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Remove two unneeded exports and make two symbols static in fs/mpage.c
[mirror_ubuntu-bionic-kernel.git] / drivers / char / synclinkmp.c
1 /*
2 * $Id: synclinkmp.c,v 4.38 2005/07/15 13:29:44 paulkf Exp $
3 *
4 * Device driver for Microgate SyncLink Multiport
5 * high speed multiprotocol serial adapter.
6 *
7 * written by Paul Fulghum for Microgate Corporation
8 * paulkf@microgate.com
9 *
10 * Microgate and SyncLink are trademarks of Microgate Corporation
11 *
12 * Derived from serial.c written by Theodore Ts'o and Linus Torvalds
13 * This code is released under the GNU General Public License (GPL)
14 *
15 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
16 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
25 * OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #define VERSION(ver,rel,seq) (((ver)<<16) | ((rel)<<8) | (seq))
29 #if defined(__i386__)
30 # define BREAKPOINT() asm(" int $3");
31 #else
32 # define BREAKPOINT() { }
33 #endif
34
35 #define MAX_DEVICES 12
36
37 #include <linux/module.h>
38 #include <linux/errno.h>
39 #include <linux/signal.h>
40 #include <linux/sched.h>
41 #include <linux/timer.h>
42 #include <linux/interrupt.h>
43 #include <linux/pci.h>
44 #include <linux/tty.h>
45 #include <linux/tty_flip.h>
46 #include <linux/serial.h>
47 #include <linux/major.h>
48 #include <linux/string.h>
49 #include <linux/fcntl.h>
50 #include <linux/ptrace.h>
51 #include <linux/ioport.h>
52 #include <linux/mm.h>
53 #include <linux/slab.h>
54 #include <linux/netdevice.h>
55 #include <linux/vmalloc.h>
56 #include <linux/init.h>
57 #include <linux/delay.h>
58 #include <linux/ioctl.h>
59
60 #include <asm/system.h>
61 #include <asm/io.h>
62 #include <asm/irq.h>
63 #include <asm/dma.h>
64 #include <linux/bitops.h>
65 #include <asm/types.h>
66 #include <linux/termios.h>
67 #include <linux/workqueue.h>
68 #include <linux/hdlc.h>
69 #include <linux/synclink.h>
70
71 #if defined(CONFIG_HDLC) || (defined(CONFIG_HDLC_MODULE) && defined(CONFIG_SYNCLINKMP_MODULE))
72 #define SYNCLINK_GENERIC_HDLC 1
73 #else
74 #define SYNCLINK_GENERIC_HDLC 0
75 #endif
76
77 #define GET_USER(error,value,addr) error = get_user(value,addr)
78 #define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0
79 #define PUT_USER(error,value,addr) error = put_user(value,addr)
80 #define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0
81
82 #include <asm/uaccess.h>
83
84 static MGSL_PARAMS default_params = {
85 MGSL_MODE_HDLC, /* unsigned long mode */
86 0, /* unsigned char loopback; */
87 HDLC_FLAG_UNDERRUN_ABORT15, /* unsigned short flags; */
88 HDLC_ENCODING_NRZI_SPACE, /* unsigned char encoding; */
89 0, /* unsigned long clock_speed; */
90 0xff, /* unsigned char addr_filter; */
91 HDLC_CRC_16_CCITT, /* unsigned short crc_type; */
92 HDLC_PREAMBLE_LENGTH_8BITS, /* unsigned char preamble_length; */
93 HDLC_PREAMBLE_PATTERN_NONE, /* unsigned char preamble; */
94 9600, /* unsigned long data_rate; */
95 8, /* unsigned char data_bits; */
96 1, /* unsigned char stop_bits; */
97 ASYNC_PARITY_NONE /* unsigned char parity; */
98 };
99
100 /* size in bytes of DMA data buffers */
101 #define SCABUFSIZE 1024
102 #define SCA_MEM_SIZE 0x40000
103 #define SCA_BASE_SIZE 512
104 #define SCA_REG_SIZE 16
105 #define SCA_MAX_PORTS 4
106 #define SCAMAXDESC 128
107
108 #define BUFFERLISTSIZE 4096
109
110 /* SCA-I style DMA buffer descriptor */
111 typedef struct _SCADESC
112 {
113 u16 next; /* lower l6 bits of next descriptor addr */
114 u16 buf_ptr; /* lower 16 bits of buffer addr */
115 u8 buf_base; /* upper 8 bits of buffer addr */
116 u8 pad1;
117 u16 length; /* length of buffer */
118 u8 status; /* status of buffer */
119 u8 pad2;
120 } SCADESC, *PSCADESC;
121
122 typedef struct _SCADESC_EX
123 {
124 /* device driver bookkeeping section */
125 char *virt_addr; /* virtual address of data buffer */
126 u16 phys_entry; /* lower 16-bits of physical address of this descriptor */
127 } SCADESC_EX, *PSCADESC_EX;
128
129 /* The queue of BH actions to be performed */
130
131 #define BH_RECEIVE 1
132 #define BH_TRANSMIT 2
133 #define BH_STATUS 4
134
135 #define IO_PIN_SHUTDOWN_LIMIT 100
136
137 struct _input_signal_events {
138 int ri_up;
139 int ri_down;
140 int dsr_up;
141 int dsr_down;
142 int dcd_up;
143 int dcd_down;
144 int cts_up;
145 int cts_down;
146 };
147
148 /*
149 * Device instance data structure
150 */
151 typedef struct _synclinkmp_info {
152 void *if_ptr; /* General purpose pointer (used by SPPP) */
153 int magic;
154 struct tty_port port;
155 int line;
156 unsigned short close_delay;
157 unsigned short closing_wait; /* time to wait before closing */
158
159 struct mgsl_icount icount;
160
161 int timeout;
162 int x_char; /* xon/xoff character */
163 u16 read_status_mask1; /* break detection (SR1 indications) */
164 u16 read_status_mask2; /* parity/framing/overun (SR2 indications) */
165 unsigned char ignore_status_mask1; /* break detection (SR1 indications) */
166 unsigned char ignore_status_mask2; /* parity/framing/overun (SR2 indications) */
167 unsigned char *tx_buf;
168 int tx_put;
169 int tx_get;
170 int tx_count;
171
172 wait_queue_head_t status_event_wait_q;
173 wait_queue_head_t event_wait_q;
174 struct timer_list tx_timer; /* HDLC transmit timeout timer */
175 struct _synclinkmp_info *next_device; /* device list link */
176 struct timer_list status_timer; /* input signal status check timer */
177
178 spinlock_t lock; /* spinlock for synchronizing with ISR */
179 struct work_struct task; /* task structure for scheduling bh */
180
181 u32 max_frame_size; /* as set by device config */
182
183 u32 pending_bh;
184
185 bool bh_running; /* Protection from multiple */
186 int isr_overflow;
187 bool bh_requested;
188
189 int dcd_chkcount; /* check counts to prevent */
190 int cts_chkcount; /* too many IRQs if a signal */
191 int dsr_chkcount; /* is floating */
192 int ri_chkcount;
193
194 char *buffer_list; /* virtual address of Rx & Tx buffer lists */
195 unsigned long buffer_list_phys;
196
197 unsigned int rx_buf_count; /* count of total allocated Rx buffers */
198 SCADESC *rx_buf_list; /* list of receive buffer entries */
199 SCADESC_EX rx_buf_list_ex[SCAMAXDESC]; /* list of receive buffer entries */
200 unsigned int current_rx_buf;
201
202 unsigned int tx_buf_count; /* count of total allocated Tx buffers */
203 SCADESC *tx_buf_list; /* list of transmit buffer entries */
204 SCADESC_EX tx_buf_list_ex[SCAMAXDESC]; /* list of transmit buffer entries */
205 unsigned int last_tx_buf;
206
207 unsigned char *tmp_rx_buf;
208 unsigned int tmp_rx_buf_count;
209
210 bool rx_enabled;
211 bool rx_overflow;
212
213 bool tx_enabled;
214 bool tx_active;
215 u32 idle_mode;
216
217 unsigned char ie0_value;
218 unsigned char ie1_value;
219 unsigned char ie2_value;
220 unsigned char ctrlreg_value;
221 unsigned char old_signals;
222
223 char device_name[25]; /* device instance name */
224
225 int port_count;
226 int adapter_num;
227 int port_num;
228
229 struct _synclinkmp_info *port_array[SCA_MAX_PORTS];
230
231 unsigned int bus_type; /* expansion bus type (ISA,EISA,PCI) */
232
233 unsigned int irq_level; /* interrupt level */
234 unsigned long irq_flags;
235 bool irq_requested; /* true if IRQ requested */
236
237 MGSL_PARAMS params; /* communications parameters */
238
239 unsigned char serial_signals; /* current serial signal states */
240
241 bool irq_occurred; /* for diagnostics use */
242 unsigned int init_error; /* Initialization startup error */
243
244 u32 last_mem_alloc;
245 unsigned char* memory_base; /* shared memory address (PCI only) */
246 u32 phys_memory_base;
247 int shared_mem_requested;
248
249 unsigned char* sca_base; /* HD64570 SCA Memory address */
250 u32 phys_sca_base;
251 u32 sca_offset;
252 bool sca_base_requested;
253
254 unsigned char* lcr_base; /* local config registers (PCI only) */
255 u32 phys_lcr_base;
256 u32 lcr_offset;
257 int lcr_mem_requested;
258
259 unsigned char* statctrl_base; /* status/control register memory */
260 u32 phys_statctrl_base;
261 u32 statctrl_offset;
262 bool sca_statctrl_requested;
263
264 u32 misc_ctrl_value;
265 char flag_buf[MAX_ASYNC_BUFFER_SIZE];
266 char char_buf[MAX_ASYNC_BUFFER_SIZE];
267 bool drop_rts_on_tx_done;
268
269 struct _input_signal_events input_signal_events;
270
271 /* SPPP/Cisco HDLC device parts */
272 int netcount;
273 spinlock_t netlock;
274
275 #if SYNCLINK_GENERIC_HDLC
276 struct net_device *netdev;
277 #endif
278
279 } SLMP_INFO;
280
281 #define MGSL_MAGIC 0x5401
282
283 /*
284 * define serial signal status change macros
285 */
286 #define MISCSTATUS_DCD_LATCHED (SerialSignal_DCD<<8) /* indicates change in DCD */
287 #define MISCSTATUS_RI_LATCHED (SerialSignal_RI<<8) /* indicates change in RI */
288 #define MISCSTATUS_CTS_LATCHED (SerialSignal_CTS<<8) /* indicates change in CTS */
289 #define MISCSTATUS_DSR_LATCHED (SerialSignal_DSR<<8) /* change in DSR */
290
291 /* Common Register macros */
292 #define LPR 0x00
293 #define PABR0 0x02
294 #define PABR1 0x03
295 #define WCRL 0x04
296 #define WCRM 0x05
297 #define WCRH 0x06
298 #define DPCR 0x08
299 #define DMER 0x09
300 #define ISR0 0x10
301 #define ISR1 0x11
302 #define ISR2 0x12
303 #define IER0 0x14
304 #define IER1 0x15
305 #define IER2 0x16
306 #define ITCR 0x18
307 #define INTVR 0x1a
308 #define IMVR 0x1c
309
310 /* MSCI Register macros */
311 #define TRB 0x20
312 #define TRBL 0x20
313 #define TRBH 0x21
314 #define SR0 0x22
315 #define SR1 0x23
316 #define SR2 0x24
317 #define SR3 0x25
318 #define FST 0x26
319 #define IE0 0x28
320 #define IE1 0x29
321 #define IE2 0x2a
322 #define FIE 0x2b
323 #define CMD 0x2c
324 #define MD0 0x2e
325 #define MD1 0x2f
326 #define MD2 0x30
327 #define CTL 0x31
328 #define SA0 0x32
329 #define SA1 0x33
330 #define IDL 0x34
331 #define TMC 0x35
332 #define RXS 0x36
333 #define TXS 0x37
334 #define TRC0 0x38
335 #define TRC1 0x39
336 #define RRC 0x3a
337 #define CST0 0x3c
338 #define CST1 0x3d
339
340 /* Timer Register Macros */
341 #define TCNT 0x60
342 #define TCNTL 0x60
343 #define TCNTH 0x61
344 #define TCONR 0x62
345 #define TCONRL 0x62
346 #define TCONRH 0x63
347 #define TMCS 0x64
348 #define TEPR 0x65
349
350 /* DMA Controller Register macros */
351 #define DARL 0x80
352 #define DARH 0x81
353 #define DARB 0x82
354 #define BAR 0x80
355 #define BARL 0x80
356 #define BARH 0x81
357 #define BARB 0x82
358 #define SAR 0x84
359 #define SARL 0x84
360 #define SARH 0x85
361 #define SARB 0x86
362 #define CPB 0x86
363 #define CDA 0x88
364 #define CDAL 0x88
365 #define CDAH 0x89
366 #define EDA 0x8a
367 #define EDAL 0x8a
368 #define EDAH 0x8b
369 #define BFL 0x8c
370 #define BFLL 0x8c
371 #define BFLH 0x8d
372 #define BCR 0x8e
373 #define BCRL 0x8e
374 #define BCRH 0x8f
375 #define DSR 0x90
376 #define DMR 0x91
377 #define FCT 0x93
378 #define DIR 0x94
379 #define DCMD 0x95
380
381 /* combine with timer or DMA register address */
382 #define TIMER0 0x00
383 #define TIMER1 0x08
384 #define TIMER2 0x10
385 #define TIMER3 0x18
386 #define RXDMA 0x00
387 #define TXDMA 0x20
388
389 /* SCA Command Codes */
390 #define NOOP 0x00
391 #define TXRESET 0x01
392 #define TXENABLE 0x02
393 #define TXDISABLE 0x03
394 #define TXCRCINIT 0x04
395 #define TXCRCEXCL 0x05
396 #define TXEOM 0x06
397 #define TXABORT 0x07
398 #define MPON 0x08
399 #define TXBUFCLR 0x09
400 #define RXRESET 0x11
401 #define RXENABLE 0x12
402 #define RXDISABLE 0x13
403 #define RXCRCINIT 0x14
404 #define RXREJECT 0x15
405 #define SEARCHMP 0x16
406 #define RXCRCEXCL 0x17
407 #define RXCRCCALC 0x18
408 #define CHRESET 0x21
409 #define HUNT 0x31
410
411 /* DMA command codes */
412 #define SWABORT 0x01
413 #define FEICLEAR 0x02
414
415 /* IE0 */
416 #define TXINTE BIT7
417 #define RXINTE BIT6
418 #define TXRDYE BIT1
419 #define RXRDYE BIT0
420
421 /* IE1 & SR1 */
422 #define UDRN BIT7
423 #define IDLE BIT6
424 #define SYNCD BIT4
425 #define FLGD BIT4
426 #define CCTS BIT3
427 #define CDCD BIT2
428 #define BRKD BIT1
429 #define ABTD BIT1
430 #define GAPD BIT1
431 #define BRKE BIT0
432 #define IDLD BIT0
433
434 /* IE2 & SR2 */
435 #define EOM BIT7
436 #define PMP BIT6
437 #define SHRT BIT6
438 #define PE BIT5
439 #define ABT BIT5
440 #define FRME BIT4
441 #define RBIT BIT4
442 #define OVRN BIT3
443 #define CRCE BIT2
444
445
446 /*
447 * Global linked list of SyncLink devices
448 */
449 static SLMP_INFO *synclinkmp_device_list = NULL;
450 static int synclinkmp_adapter_count = -1;
451 static int synclinkmp_device_count = 0;
452
453 /*
454 * Set this param to non-zero to load eax with the
455 * .text section address and breakpoint on module load.
456 * This is useful for use with gdb and add-symbol-file command.
457 */
458 static int break_on_load = 0;
459
460 /*
461 * Driver major number, defaults to zero to get auto
462 * assigned major number. May be forced as module parameter.
463 */
464 static int ttymajor = 0;
465
466 /*
467 * Array of user specified options for ISA adapters.
468 */
469 static int debug_level = 0;
470 static int maxframe[MAX_DEVICES] = {0,};
471
472 module_param(break_on_load, bool, 0);
473 module_param(ttymajor, int, 0);
474 module_param(debug_level, int, 0);
475 module_param_array(maxframe, int, NULL, 0);
476
477 static char *driver_name = "SyncLink MultiPort driver";
478 static char *driver_version = "$Revision: 4.38 $";
479
480 static int synclinkmp_init_one(struct pci_dev *dev,const struct pci_device_id *ent);
481 static void synclinkmp_remove_one(struct pci_dev *dev);
482
483 static struct pci_device_id synclinkmp_pci_tbl[] = {
484 { PCI_VENDOR_ID_MICROGATE, PCI_DEVICE_ID_MICROGATE_SCA, PCI_ANY_ID, PCI_ANY_ID, },
485 { 0, }, /* terminate list */
486 };
487 MODULE_DEVICE_TABLE(pci, synclinkmp_pci_tbl);
488
489 MODULE_LICENSE("GPL");
490
491 static struct pci_driver synclinkmp_pci_driver = {
492 .name = "synclinkmp",
493 .id_table = synclinkmp_pci_tbl,
494 .probe = synclinkmp_init_one,
495 .remove = __devexit_p(synclinkmp_remove_one),
496 };
497
498
499 static struct tty_driver *serial_driver;
500
501 /* number of characters left in xmit buffer before we ask for more */
502 #define WAKEUP_CHARS 256
503
504
505 /* tty callbacks */
506
507 static int open(struct tty_struct *tty, struct file * filp);
508 static void close(struct tty_struct *tty, struct file * filp);
509 static void hangup(struct tty_struct *tty);
510 static void set_termios(struct tty_struct *tty, struct ktermios *old_termios);
511
512 static int write(struct tty_struct *tty, const unsigned char *buf, int count);
513 static int put_char(struct tty_struct *tty, unsigned char ch);
514 static void send_xchar(struct tty_struct *tty, char ch);
515 static void wait_until_sent(struct tty_struct *tty, int timeout);
516 static int write_room(struct tty_struct *tty);
517 static void flush_chars(struct tty_struct *tty);
518 static void flush_buffer(struct tty_struct *tty);
519 static void tx_hold(struct tty_struct *tty);
520 static void tx_release(struct tty_struct *tty);
521
522 static int ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg);
523 static int read_proc(char *page, char **start, off_t off, int count,int *eof, void *data);
524 static int chars_in_buffer(struct tty_struct *tty);
525 static void throttle(struct tty_struct * tty);
526 static void unthrottle(struct tty_struct * tty);
527 static int set_break(struct tty_struct *tty, int break_state);
528
529 #if SYNCLINK_GENERIC_HDLC
530 #define dev_to_port(D) (dev_to_hdlc(D)->priv)
531 static void hdlcdev_tx_done(SLMP_INFO *info);
532 static void hdlcdev_rx(SLMP_INFO *info, char *buf, int size);
533 static int hdlcdev_init(SLMP_INFO *info);
534 static void hdlcdev_exit(SLMP_INFO *info);
535 #endif
536
537 /* ioctl handlers */
538
539 static int get_stats(SLMP_INFO *info, struct mgsl_icount __user *user_icount);
540 static int get_params(SLMP_INFO *info, MGSL_PARAMS __user *params);
541 static int set_params(SLMP_INFO *info, MGSL_PARAMS __user *params);
542 static int get_txidle(SLMP_INFO *info, int __user *idle_mode);
543 static int set_txidle(SLMP_INFO *info, int idle_mode);
544 static int tx_enable(SLMP_INFO *info, int enable);
545 static int tx_abort(SLMP_INFO *info);
546 static int rx_enable(SLMP_INFO *info, int enable);
547 static int modem_input_wait(SLMP_INFO *info,int arg);
548 static int wait_mgsl_event(SLMP_INFO *info, int __user *mask_ptr);
549 static int tiocmget(struct tty_struct *tty, struct file *file);
550 static int tiocmset(struct tty_struct *tty, struct file *file,
551 unsigned int set, unsigned int clear);
552 static int set_break(struct tty_struct *tty, int break_state);
553
554 static void add_device(SLMP_INFO *info);
555 static void device_init(int adapter_num, struct pci_dev *pdev);
556 static int claim_resources(SLMP_INFO *info);
557 static void release_resources(SLMP_INFO *info);
558
559 static int startup(SLMP_INFO *info);
560 static int block_til_ready(struct tty_struct *tty, struct file * filp,SLMP_INFO *info);
561 static int carrier_raised(struct tty_port *port);
562 static void shutdown(SLMP_INFO *info);
563 static void program_hw(SLMP_INFO *info);
564 static void change_params(SLMP_INFO *info);
565
566 static bool init_adapter(SLMP_INFO *info);
567 static bool register_test(SLMP_INFO *info);
568 static bool irq_test(SLMP_INFO *info);
569 static bool loopback_test(SLMP_INFO *info);
570 static int adapter_test(SLMP_INFO *info);
571 static bool memory_test(SLMP_INFO *info);
572
573 static void reset_adapter(SLMP_INFO *info);
574 static void reset_port(SLMP_INFO *info);
575 static void async_mode(SLMP_INFO *info);
576 static void hdlc_mode(SLMP_INFO *info);
577
578 static void rx_stop(SLMP_INFO *info);
579 static void rx_start(SLMP_INFO *info);
580 static void rx_reset_buffers(SLMP_INFO *info);
581 static void rx_free_frame_buffers(SLMP_INFO *info, unsigned int first, unsigned int last);
582 static bool rx_get_frame(SLMP_INFO *info);
583
584 static void tx_start(SLMP_INFO *info);
585 static void tx_stop(SLMP_INFO *info);
586 static void tx_load_fifo(SLMP_INFO *info);
587 static void tx_set_idle(SLMP_INFO *info);
588 static void tx_load_dma_buffer(SLMP_INFO *info, const char *buf, unsigned int count);
589
590 static void get_signals(SLMP_INFO *info);
591 static void set_signals(SLMP_INFO *info);
592 static void enable_loopback(SLMP_INFO *info, int enable);
593 static void set_rate(SLMP_INFO *info, u32 data_rate);
594
595 static int bh_action(SLMP_INFO *info);
596 static void bh_handler(struct work_struct *work);
597 static void bh_receive(SLMP_INFO *info);
598 static void bh_transmit(SLMP_INFO *info);
599 static void bh_status(SLMP_INFO *info);
600 static void isr_timer(SLMP_INFO *info);
601 static void isr_rxint(SLMP_INFO *info);
602 static void isr_rxrdy(SLMP_INFO *info);
603 static void isr_txint(SLMP_INFO *info);
604 static void isr_txrdy(SLMP_INFO *info);
605 static void isr_rxdmaok(SLMP_INFO *info);
606 static void isr_rxdmaerror(SLMP_INFO *info);
607 static void isr_txdmaok(SLMP_INFO *info);
608 static void isr_txdmaerror(SLMP_INFO *info);
609 static void isr_io_pin(SLMP_INFO *info, u16 status);
610
611 static int alloc_dma_bufs(SLMP_INFO *info);
612 static void free_dma_bufs(SLMP_INFO *info);
613 static int alloc_buf_list(SLMP_INFO *info);
614 static int alloc_frame_bufs(SLMP_INFO *info, SCADESC *list, SCADESC_EX *list_ex,int count);
615 static int alloc_tmp_rx_buf(SLMP_INFO *info);
616 static void free_tmp_rx_buf(SLMP_INFO *info);
617
618 static void load_pci_memory(SLMP_INFO *info, char* dest, const char* src, unsigned short count);
619 static void trace_block(SLMP_INFO *info, const char* data, int count, int xmit);
620 static void tx_timeout(unsigned long context);
621 static void status_timeout(unsigned long context);
622
623 static unsigned char read_reg(SLMP_INFO *info, unsigned char addr);
624 static void write_reg(SLMP_INFO *info, unsigned char addr, unsigned char val);
625 static u16 read_reg16(SLMP_INFO *info, unsigned char addr);
626 static void write_reg16(SLMP_INFO *info, unsigned char addr, u16 val);
627 static unsigned char read_status_reg(SLMP_INFO * info);
628 static void write_control_reg(SLMP_INFO * info);
629
630
631 static unsigned char rx_active_fifo_level = 16; // rx request FIFO activation level in bytes
632 static unsigned char tx_active_fifo_level = 16; // tx request FIFO activation level in bytes
633 static unsigned char tx_negate_fifo_level = 32; // tx request FIFO negation level in bytes
634
635 static u32 misc_ctrl_value = 0x007e4040;
636 static u32 lcr1_brdr_value = 0x00800028;
637
638 static u32 read_ahead_count = 8;
639
640 /* DPCR, DMA Priority Control
641 *
642 * 07..05 Not used, must be 0
643 * 04 BRC, bus release condition: 0=all transfers complete
644 * 1=release after 1 xfer on all channels
645 * 03 CCC, channel change condition: 0=every cycle
646 * 1=after each channel completes all xfers
647 * 02..00 PR<2..0>, priority 100=round robin
648 *
649 * 00000100 = 0x00
650 */
651 static unsigned char dma_priority = 0x04;
652
653 // Number of bytes that can be written to shared RAM
654 // in a single write operation
655 static u32 sca_pci_load_interval = 64;
656
657 /*
658 * 1st function defined in .text section. Calling this function in
659 * init_module() followed by a breakpoint allows a remote debugger
660 * (gdb) to get the .text address for the add-symbol-file command.
661 * This allows remote debugging of dynamically loadable modules.
662 */
663 static void* synclinkmp_get_text_ptr(void);
664 static void* synclinkmp_get_text_ptr(void) {return synclinkmp_get_text_ptr;}
665
666 static inline int sanity_check(SLMP_INFO *info,
667 char *name, const char *routine)
668 {
669 #ifdef SANITY_CHECK
670 static const char *badmagic =
671 "Warning: bad magic number for synclinkmp_struct (%s) in %s\n";
672 static const char *badinfo =
673 "Warning: null synclinkmp_struct for (%s) in %s\n";
674
675 if (!info) {
676 printk(badinfo, name, routine);
677 return 1;
678 }
679 if (info->magic != MGSL_MAGIC) {
680 printk(badmagic, name, routine);
681 return 1;
682 }
683 #else
684 if (!info)
685 return 1;
686 #endif
687 return 0;
688 }
689
690 /**
691 * line discipline callback wrappers
692 *
693 * The wrappers maintain line discipline references
694 * while calling into the line discipline.
695 *
696 * ldisc_receive_buf - pass receive data to line discipline
697 */
698
699 static void ldisc_receive_buf(struct tty_struct *tty,
700 const __u8 *data, char *flags, int count)
701 {
702 struct tty_ldisc *ld;
703 if (!tty)
704 return;
705 ld = tty_ldisc_ref(tty);
706 if (ld) {
707 if (ld->ops->receive_buf)
708 ld->ops->receive_buf(tty, data, flags, count);
709 tty_ldisc_deref(ld);
710 }
711 }
712
713 /* tty callbacks */
714
715 /* Called when a port is opened. Init and enable port.
716 */
717 static int open(struct tty_struct *tty, struct file *filp)
718 {
719 SLMP_INFO *info;
720 int retval, line;
721 unsigned long flags;
722
723 line = tty->index;
724 if ((line < 0) || (line >= synclinkmp_device_count)) {
725 printk("%s(%d): open with invalid line #%d.\n",
726 __FILE__,__LINE__,line);
727 return -ENODEV;
728 }
729
730 info = synclinkmp_device_list;
731 while(info && info->line != line)
732 info = info->next_device;
733 if (sanity_check(info, tty->name, "open"))
734 return -ENODEV;
735 if ( info->init_error ) {
736 printk("%s(%d):%s device is not allocated, init error=%d\n",
737 __FILE__,__LINE__,info->device_name,info->init_error);
738 return -ENODEV;
739 }
740
741 tty->driver_data = info;
742 info->port.tty = tty;
743
744 if (debug_level >= DEBUG_LEVEL_INFO)
745 printk("%s(%d):%s open(), old ref count = %d\n",
746 __FILE__,__LINE__,tty->driver->name, info->port.count);
747
748 /* If port is closing, signal caller to try again */
749 if (tty_hung_up_p(filp) || info->port.flags & ASYNC_CLOSING){
750 if (info->port.flags & ASYNC_CLOSING)
751 interruptible_sleep_on(&info->port.close_wait);
752 retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
753 -EAGAIN : -ERESTARTSYS);
754 goto cleanup;
755 }
756
757 info->port.tty->low_latency = (info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0;
758
759 spin_lock_irqsave(&info->netlock, flags);
760 if (info->netcount) {
761 retval = -EBUSY;
762 spin_unlock_irqrestore(&info->netlock, flags);
763 goto cleanup;
764 }
765 info->port.count++;
766 spin_unlock_irqrestore(&info->netlock, flags);
767
768 if (info->port.count == 1) {
769 /* 1st open on this device, init hardware */
770 retval = startup(info);
771 if (retval < 0)
772 goto cleanup;
773 }
774
775 retval = block_til_ready(tty, filp, info);
776 if (retval) {
777 if (debug_level >= DEBUG_LEVEL_INFO)
778 printk("%s(%d):%s block_til_ready() returned %d\n",
779 __FILE__,__LINE__, info->device_name, retval);
780 goto cleanup;
781 }
782
783 if (debug_level >= DEBUG_LEVEL_INFO)
784 printk("%s(%d):%s open() success\n",
785 __FILE__,__LINE__, info->device_name);
786 retval = 0;
787
788 cleanup:
789 if (retval) {
790 if (tty->count == 1)
791 info->port.tty = NULL; /* tty layer will release tty struct */
792 if(info->port.count)
793 info->port.count--;
794 }
795
796 return retval;
797 }
798
799 /* Called when port is closed. Wait for remaining data to be
800 * sent. Disable port and free resources.
801 */
802 static void close(struct tty_struct *tty, struct file *filp)
803 {
804 SLMP_INFO * info = tty->driver_data;
805
806 if (sanity_check(info, tty->name, "close"))
807 return;
808
809 if (debug_level >= DEBUG_LEVEL_INFO)
810 printk("%s(%d):%s close() entry, count=%d\n",
811 __FILE__,__LINE__, info->device_name, info->port.count);
812
813 if (tty_port_close_start(&info->port, tty, filp) == 0)
814 goto cleanup;
815
816 if (info->port.flags & ASYNC_INITIALIZED)
817 wait_until_sent(tty, info->timeout);
818
819 flush_buffer(tty);
820 tty_ldisc_flush(tty);
821 shutdown(info);
822
823 tty_port_close_end(&info->port, tty);
824 info->port.tty = NULL;
825 cleanup:
826 if (debug_level >= DEBUG_LEVEL_INFO)
827 printk("%s(%d):%s close() exit, count=%d\n", __FILE__,__LINE__,
828 tty->driver->name, info->port.count);
829 }
830
831 /* Called by tty_hangup() when a hangup is signaled.
832 * This is the same as closing all open descriptors for the port.
833 */
834 static void hangup(struct tty_struct *tty)
835 {
836 SLMP_INFO *info = tty->driver_data;
837
838 if (debug_level >= DEBUG_LEVEL_INFO)
839 printk("%s(%d):%s hangup()\n",
840 __FILE__,__LINE__, info->device_name );
841
842 if (sanity_check(info, tty->name, "hangup"))
843 return;
844
845 flush_buffer(tty);
846 shutdown(info);
847
848 info->port.count = 0;
849 info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
850 info->port.tty = NULL;
851
852 wake_up_interruptible(&info->port.open_wait);
853 }
854
855 /* Set new termios settings
856 */
857 static void set_termios(struct tty_struct *tty, struct ktermios *old_termios)
858 {
859 SLMP_INFO *info = tty->driver_data;
860 unsigned long flags;
861
862 if (debug_level >= DEBUG_LEVEL_INFO)
863 printk("%s(%d):%s set_termios()\n", __FILE__,__LINE__,
864 tty->driver->name );
865
866 change_params(info);
867
868 /* Handle transition to B0 status */
869 if (old_termios->c_cflag & CBAUD &&
870 !(tty->termios->c_cflag & CBAUD)) {
871 info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
872 spin_lock_irqsave(&info->lock,flags);
873 set_signals(info);
874 spin_unlock_irqrestore(&info->lock,flags);
875 }
876
877 /* Handle transition away from B0 status */
878 if (!(old_termios->c_cflag & CBAUD) &&
879 tty->termios->c_cflag & CBAUD) {
880 info->serial_signals |= SerialSignal_DTR;
881 if (!(tty->termios->c_cflag & CRTSCTS) ||
882 !test_bit(TTY_THROTTLED, &tty->flags)) {
883 info->serial_signals |= SerialSignal_RTS;
884 }
885 spin_lock_irqsave(&info->lock,flags);
886 set_signals(info);
887 spin_unlock_irqrestore(&info->lock,flags);
888 }
889
890 /* Handle turning off CRTSCTS */
891 if (old_termios->c_cflag & CRTSCTS &&
892 !(tty->termios->c_cflag & CRTSCTS)) {
893 tty->hw_stopped = 0;
894 tx_release(tty);
895 }
896 }
897
898 /* Send a block of data
899 *
900 * Arguments:
901 *
902 * tty pointer to tty information structure
903 * buf pointer to buffer containing send data
904 * count size of send data in bytes
905 *
906 * Return Value: number of characters written
907 */
908 static int write(struct tty_struct *tty,
909 const unsigned char *buf, int count)
910 {
911 int c, ret = 0;
912 SLMP_INFO *info = tty->driver_data;
913 unsigned long flags;
914
915 if (debug_level >= DEBUG_LEVEL_INFO)
916 printk("%s(%d):%s write() count=%d\n",
917 __FILE__,__LINE__,info->device_name,count);
918
919 if (sanity_check(info, tty->name, "write"))
920 goto cleanup;
921
922 if (!info->tx_buf)
923 goto cleanup;
924
925 if (info->params.mode == MGSL_MODE_HDLC) {
926 if (count > info->max_frame_size) {
927 ret = -EIO;
928 goto cleanup;
929 }
930 if (info->tx_active)
931 goto cleanup;
932 if (info->tx_count) {
933 /* send accumulated data from send_char() calls */
934 /* as frame and wait before accepting more data. */
935 tx_load_dma_buffer(info, info->tx_buf, info->tx_count);
936 goto start;
937 }
938 ret = info->tx_count = count;
939 tx_load_dma_buffer(info, buf, count);
940 goto start;
941 }
942
943 for (;;) {
944 c = min_t(int, count,
945 min(info->max_frame_size - info->tx_count - 1,
946 info->max_frame_size - info->tx_put));
947 if (c <= 0)
948 break;
949
950 memcpy(info->tx_buf + info->tx_put, buf, c);
951
952 spin_lock_irqsave(&info->lock,flags);
953 info->tx_put += c;
954 if (info->tx_put >= info->max_frame_size)
955 info->tx_put -= info->max_frame_size;
956 info->tx_count += c;
957 spin_unlock_irqrestore(&info->lock,flags);
958
959 buf += c;
960 count -= c;
961 ret += c;
962 }
963
964 if (info->params.mode == MGSL_MODE_HDLC) {
965 if (count) {
966 ret = info->tx_count = 0;
967 goto cleanup;
968 }
969 tx_load_dma_buffer(info, info->tx_buf, info->tx_count);
970 }
971 start:
972 if (info->tx_count && !tty->stopped && !tty->hw_stopped) {
973 spin_lock_irqsave(&info->lock,flags);
974 if (!info->tx_active)
975 tx_start(info);
976 spin_unlock_irqrestore(&info->lock,flags);
977 }
978
979 cleanup:
980 if (debug_level >= DEBUG_LEVEL_INFO)
981 printk( "%s(%d):%s write() returning=%d\n",
982 __FILE__,__LINE__,info->device_name,ret);
983 return ret;
984 }
985
986 /* Add a character to the transmit buffer.
987 */
988 static int put_char(struct tty_struct *tty, unsigned char ch)
989 {
990 SLMP_INFO *info = tty->driver_data;
991 unsigned long flags;
992 int ret = 0;
993
994 if ( debug_level >= DEBUG_LEVEL_INFO ) {
995 printk( "%s(%d):%s put_char(%d)\n",
996 __FILE__,__LINE__,info->device_name,ch);
997 }
998
999 if (sanity_check(info, tty->name, "put_char"))
1000 return 0;
1001
1002 if (!info->tx_buf)
1003 return 0;
1004
1005 spin_lock_irqsave(&info->lock,flags);
1006
1007 if ( (info->params.mode != MGSL_MODE_HDLC) ||
1008 !info->tx_active ) {
1009
1010 if (info->tx_count < info->max_frame_size - 1) {
1011 info->tx_buf[info->tx_put++] = ch;
1012 if (info->tx_put >= info->max_frame_size)
1013 info->tx_put -= info->max_frame_size;
1014 info->tx_count++;
1015 ret = 1;
1016 }
1017 }
1018
1019 spin_unlock_irqrestore(&info->lock,flags);
1020 return ret;
1021 }
1022
1023 /* Send a high-priority XON/XOFF character
1024 */
1025 static void send_xchar(struct tty_struct *tty, char ch)
1026 {
1027 SLMP_INFO *info = tty->driver_data;
1028 unsigned long flags;
1029
1030 if (debug_level >= DEBUG_LEVEL_INFO)
1031 printk("%s(%d):%s send_xchar(%d)\n",
1032 __FILE__,__LINE__, info->device_name, ch );
1033
1034 if (sanity_check(info, tty->name, "send_xchar"))
1035 return;
1036
1037 info->x_char = ch;
1038 if (ch) {
1039 /* Make sure transmit interrupts are on */
1040 spin_lock_irqsave(&info->lock,flags);
1041 if (!info->tx_enabled)
1042 tx_start(info);
1043 spin_unlock_irqrestore(&info->lock,flags);
1044 }
1045 }
1046
1047 /* Wait until the transmitter is empty.
1048 */
1049 static void wait_until_sent(struct tty_struct *tty, int timeout)
1050 {
1051 SLMP_INFO * info = tty->driver_data;
1052 unsigned long orig_jiffies, char_time;
1053
1054 if (!info )
1055 return;
1056
1057 if (debug_level >= DEBUG_LEVEL_INFO)
1058 printk("%s(%d):%s wait_until_sent() entry\n",
1059 __FILE__,__LINE__, info->device_name );
1060
1061 if (sanity_check(info, tty->name, "wait_until_sent"))
1062 return;
1063
1064 lock_kernel();
1065
1066 if (!(info->port.flags & ASYNC_INITIALIZED))
1067 goto exit;
1068
1069 orig_jiffies = jiffies;
1070
1071 /* Set check interval to 1/5 of estimated time to
1072 * send a character, and make it at least 1. The check
1073 * interval should also be less than the timeout.
1074 * Note: use tight timings here to satisfy the NIST-PCTS.
1075 */
1076
1077 if ( info->params.data_rate ) {
1078 char_time = info->timeout/(32 * 5);
1079 if (!char_time)
1080 char_time++;
1081 } else
1082 char_time = 1;
1083
1084 if (timeout)
1085 char_time = min_t(unsigned long, char_time, timeout);
1086
1087 if ( info->params.mode == MGSL_MODE_HDLC ) {
1088 while (info->tx_active) {
1089 msleep_interruptible(jiffies_to_msecs(char_time));
1090 if (signal_pending(current))
1091 break;
1092 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1093 break;
1094 }
1095 } else {
1096 //TODO: determine if there is something similar to USC16C32
1097 // TXSTATUS_ALL_SENT status
1098 while ( info->tx_active && info->tx_enabled) {
1099 msleep_interruptible(jiffies_to_msecs(char_time));
1100 if (signal_pending(current))
1101 break;
1102 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1103 break;
1104 }
1105 }
1106
1107 exit:
1108 unlock_kernel();
1109 if (debug_level >= DEBUG_LEVEL_INFO)
1110 printk("%s(%d):%s wait_until_sent() exit\n",
1111 __FILE__,__LINE__, info->device_name );
1112 }
1113
1114 /* Return the count of free bytes in transmit buffer
1115 */
1116 static int write_room(struct tty_struct *tty)
1117 {
1118 SLMP_INFO *info = tty->driver_data;
1119 int ret;
1120
1121 if (sanity_check(info, tty->name, "write_room"))
1122 return 0;
1123
1124 lock_kernel();
1125 if (info->params.mode == MGSL_MODE_HDLC) {
1126 ret = (info->tx_active) ? 0 : HDLC_MAX_FRAME_SIZE;
1127 } else {
1128 ret = info->max_frame_size - info->tx_count - 1;
1129 if (ret < 0)
1130 ret = 0;
1131 }
1132 unlock_kernel();
1133
1134 if (debug_level >= DEBUG_LEVEL_INFO)
1135 printk("%s(%d):%s write_room()=%d\n",
1136 __FILE__, __LINE__, info->device_name, ret);
1137
1138 return ret;
1139 }
1140
1141 /* enable transmitter and send remaining buffered characters
1142 */
1143 static void flush_chars(struct tty_struct *tty)
1144 {
1145 SLMP_INFO *info = tty->driver_data;
1146 unsigned long flags;
1147
1148 if ( debug_level >= DEBUG_LEVEL_INFO )
1149 printk( "%s(%d):%s flush_chars() entry tx_count=%d\n",
1150 __FILE__,__LINE__,info->device_name,info->tx_count);
1151
1152 if (sanity_check(info, tty->name, "flush_chars"))
1153 return;
1154
1155 if (info->tx_count <= 0 || tty->stopped || tty->hw_stopped ||
1156 !info->tx_buf)
1157 return;
1158
1159 if ( debug_level >= DEBUG_LEVEL_INFO )
1160 printk( "%s(%d):%s flush_chars() entry, starting transmitter\n",
1161 __FILE__,__LINE__,info->device_name );
1162
1163 spin_lock_irqsave(&info->lock,flags);
1164
1165 if (!info->tx_active) {
1166 if ( (info->params.mode == MGSL_MODE_HDLC) &&
1167 info->tx_count ) {
1168 /* operating in synchronous (frame oriented) mode */
1169 /* copy data from circular tx_buf to */
1170 /* transmit DMA buffer. */
1171 tx_load_dma_buffer(info,
1172 info->tx_buf,info->tx_count);
1173 }
1174 tx_start(info);
1175 }
1176
1177 spin_unlock_irqrestore(&info->lock,flags);
1178 }
1179
1180 /* Discard all data in the send buffer
1181 */
1182 static void flush_buffer(struct tty_struct *tty)
1183 {
1184 SLMP_INFO *info = tty->driver_data;
1185 unsigned long flags;
1186
1187 if (debug_level >= DEBUG_LEVEL_INFO)
1188 printk("%s(%d):%s flush_buffer() entry\n",
1189 __FILE__,__LINE__, info->device_name );
1190
1191 if (sanity_check(info, tty->name, "flush_buffer"))
1192 return;
1193
1194 spin_lock_irqsave(&info->lock,flags);
1195 info->tx_count = info->tx_put = info->tx_get = 0;
1196 del_timer(&info->tx_timer);
1197 spin_unlock_irqrestore(&info->lock,flags);
1198
1199 tty_wakeup(tty);
1200 }
1201
1202 /* throttle (stop) transmitter
1203 */
1204 static void tx_hold(struct tty_struct *tty)
1205 {
1206 SLMP_INFO *info = tty->driver_data;
1207 unsigned long flags;
1208
1209 if (sanity_check(info, tty->name, "tx_hold"))
1210 return;
1211
1212 if ( debug_level >= DEBUG_LEVEL_INFO )
1213 printk("%s(%d):%s tx_hold()\n",
1214 __FILE__,__LINE__,info->device_name);
1215
1216 spin_lock_irqsave(&info->lock,flags);
1217 if (info->tx_enabled)
1218 tx_stop(info);
1219 spin_unlock_irqrestore(&info->lock,flags);
1220 }
1221
1222 /* release (start) transmitter
1223 */
1224 static void tx_release(struct tty_struct *tty)
1225 {
1226 SLMP_INFO *info = tty->driver_data;
1227 unsigned long flags;
1228
1229 if (sanity_check(info, tty->name, "tx_release"))
1230 return;
1231
1232 if ( debug_level >= DEBUG_LEVEL_INFO )
1233 printk("%s(%d):%s tx_release()\n",
1234 __FILE__,__LINE__,info->device_name);
1235
1236 spin_lock_irqsave(&info->lock,flags);
1237 if (!info->tx_enabled)
1238 tx_start(info);
1239 spin_unlock_irqrestore(&info->lock,flags);
1240 }
1241
1242 /* Service an IOCTL request
1243 *
1244 * Arguments:
1245 *
1246 * tty pointer to tty instance data
1247 * file pointer to associated file object for device
1248 * cmd IOCTL command code
1249 * arg command argument/context
1250 *
1251 * Return Value: 0 if success, otherwise error code
1252 */
1253 static int do_ioctl(struct tty_struct *tty, struct file *file,
1254 unsigned int cmd, unsigned long arg)
1255 {
1256 SLMP_INFO *info = tty->driver_data;
1257 int error;
1258 struct mgsl_icount cnow; /* kernel counter temps */
1259 struct serial_icounter_struct __user *p_cuser; /* user space */
1260 unsigned long flags;
1261 void __user *argp = (void __user *)arg;
1262
1263 if (debug_level >= DEBUG_LEVEL_INFO)
1264 printk("%s(%d):%s ioctl() cmd=%08X\n", __FILE__,__LINE__,
1265 info->device_name, cmd );
1266
1267 if (sanity_check(info, tty->name, "ioctl"))
1268 return -ENODEV;
1269
1270 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
1271 (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
1272 if (tty->flags & (1 << TTY_IO_ERROR))
1273 return -EIO;
1274 }
1275
1276 switch (cmd) {
1277 case MGSL_IOCGPARAMS:
1278 return get_params(info, argp);
1279 case MGSL_IOCSPARAMS:
1280 return set_params(info, argp);
1281 case MGSL_IOCGTXIDLE:
1282 return get_txidle(info, argp);
1283 case MGSL_IOCSTXIDLE:
1284 return set_txidle(info, (int)arg);
1285 case MGSL_IOCTXENABLE:
1286 return tx_enable(info, (int)arg);
1287 case MGSL_IOCRXENABLE:
1288 return rx_enable(info, (int)arg);
1289 case MGSL_IOCTXABORT:
1290 return tx_abort(info);
1291 case MGSL_IOCGSTATS:
1292 return get_stats(info, argp);
1293 case MGSL_IOCWAITEVENT:
1294 return wait_mgsl_event(info, argp);
1295 case MGSL_IOCLOOPTXDONE:
1296 return 0; // TODO: Not supported, need to document
1297 /* Wait for modem input (DCD,RI,DSR,CTS) change
1298 * as specified by mask in arg (TIOCM_RNG/DSR/CD/CTS)
1299 */
1300 case TIOCMIWAIT:
1301 return modem_input_wait(info,(int)arg);
1302
1303 /*
1304 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1305 * Return: write counters to the user passed counter struct
1306 * NB: both 1->0 and 0->1 transitions are counted except for
1307 * RI where only 0->1 is counted.
1308 */
1309 case TIOCGICOUNT:
1310 spin_lock_irqsave(&info->lock,flags);
1311 cnow = info->icount;
1312 spin_unlock_irqrestore(&info->lock,flags);
1313 p_cuser = argp;
1314 PUT_USER(error,cnow.cts, &p_cuser->cts);
1315 if (error) return error;
1316 PUT_USER(error,cnow.dsr, &p_cuser->dsr);
1317 if (error) return error;
1318 PUT_USER(error,cnow.rng, &p_cuser->rng);
1319 if (error) return error;
1320 PUT_USER(error,cnow.dcd, &p_cuser->dcd);
1321 if (error) return error;
1322 PUT_USER(error,cnow.rx, &p_cuser->rx);
1323 if (error) return error;
1324 PUT_USER(error,cnow.tx, &p_cuser->tx);
1325 if (error) return error;
1326 PUT_USER(error,cnow.frame, &p_cuser->frame);
1327 if (error) return error;
1328 PUT_USER(error,cnow.overrun, &p_cuser->overrun);
1329 if (error) return error;
1330 PUT_USER(error,cnow.parity, &p_cuser->parity);
1331 if (error) return error;
1332 PUT_USER(error,cnow.brk, &p_cuser->brk);
1333 if (error) return error;
1334 PUT_USER(error,cnow.buf_overrun, &p_cuser->buf_overrun);
1335 if (error) return error;
1336 return 0;
1337 default:
1338 return -ENOIOCTLCMD;
1339 }
1340 return 0;
1341 }
1342
1343 static int ioctl(struct tty_struct *tty, struct file *file,
1344 unsigned int cmd, unsigned long arg)
1345 {
1346 int ret;
1347 lock_kernel();
1348 ret = do_ioctl(tty, file, cmd, arg);
1349 unlock_kernel();
1350 return ret;
1351 }
1352
1353 /*
1354 * /proc fs routines....
1355 */
1356
1357 static inline int line_info(char *buf, SLMP_INFO *info)
1358 {
1359 char stat_buf[30];
1360 int ret;
1361 unsigned long flags;
1362
1363 ret = sprintf(buf, "%s: SCABase=%08x Mem=%08X StatusControl=%08x LCR=%08X\n"
1364 "\tIRQ=%d MaxFrameSize=%u\n",
1365 info->device_name,
1366 info->phys_sca_base,
1367 info->phys_memory_base,
1368 info->phys_statctrl_base,
1369 info->phys_lcr_base,
1370 info->irq_level,
1371 info->max_frame_size );
1372
1373 /* output current serial signal states */
1374 spin_lock_irqsave(&info->lock,flags);
1375 get_signals(info);
1376 spin_unlock_irqrestore(&info->lock,flags);
1377
1378 stat_buf[0] = 0;
1379 stat_buf[1] = 0;
1380 if (info->serial_signals & SerialSignal_RTS)
1381 strcat(stat_buf, "|RTS");
1382 if (info->serial_signals & SerialSignal_CTS)
1383 strcat(stat_buf, "|CTS");
1384 if (info->serial_signals & SerialSignal_DTR)
1385 strcat(stat_buf, "|DTR");
1386 if (info->serial_signals & SerialSignal_DSR)
1387 strcat(stat_buf, "|DSR");
1388 if (info->serial_signals & SerialSignal_DCD)
1389 strcat(stat_buf, "|CD");
1390 if (info->serial_signals & SerialSignal_RI)
1391 strcat(stat_buf, "|RI");
1392
1393 if (info->params.mode == MGSL_MODE_HDLC) {
1394 ret += sprintf(buf+ret, "\tHDLC txok:%d rxok:%d",
1395 info->icount.txok, info->icount.rxok);
1396 if (info->icount.txunder)
1397 ret += sprintf(buf+ret, " txunder:%d", info->icount.txunder);
1398 if (info->icount.txabort)
1399 ret += sprintf(buf+ret, " txabort:%d", info->icount.txabort);
1400 if (info->icount.rxshort)
1401 ret += sprintf(buf+ret, " rxshort:%d", info->icount.rxshort);
1402 if (info->icount.rxlong)
1403 ret += sprintf(buf+ret, " rxlong:%d", info->icount.rxlong);
1404 if (info->icount.rxover)
1405 ret += sprintf(buf+ret, " rxover:%d", info->icount.rxover);
1406 if (info->icount.rxcrc)
1407 ret += sprintf(buf+ret, " rxlong:%d", info->icount.rxcrc);
1408 } else {
1409 ret += sprintf(buf+ret, "\tASYNC tx:%d rx:%d",
1410 info->icount.tx, info->icount.rx);
1411 if (info->icount.frame)
1412 ret += sprintf(buf+ret, " fe:%d", info->icount.frame);
1413 if (info->icount.parity)
1414 ret += sprintf(buf+ret, " pe:%d", info->icount.parity);
1415 if (info->icount.brk)
1416 ret += sprintf(buf+ret, " brk:%d", info->icount.brk);
1417 if (info->icount.overrun)
1418 ret += sprintf(buf+ret, " oe:%d", info->icount.overrun);
1419 }
1420
1421 /* Append serial signal status to end */
1422 ret += sprintf(buf+ret, " %s\n", stat_buf+1);
1423
1424 ret += sprintf(buf+ret, "\ttxactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
1425 info->tx_active,info->bh_requested,info->bh_running,
1426 info->pending_bh);
1427
1428 return ret;
1429 }
1430
1431 /* Called to print information about devices
1432 */
1433 static int read_proc(char *page, char **start, off_t off, int count,
1434 int *eof, void *data)
1435 {
1436 int len = 0, l;
1437 off_t begin = 0;
1438 SLMP_INFO *info;
1439
1440 len += sprintf(page, "synclinkmp driver:%s\n", driver_version);
1441
1442 info = synclinkmp_device_list;
1443 while( info ) {
1444 l = line_info(page + len, info);
1445 len += l;
1446 if (len+begin > off+count)
1447 goto done;
1448 if (len+begin < off) {
1449 begin += len;
1450 len = 0;
1451 }
1452 info = info->next_device;
1453 }
1454
1455 *eof = 1;
1456 done:
1457 if (off >= len+begin)
1458 return 0;
1459 *start = page + (off-begin);
1460 return ((count < begin+len-off) ? count : begin+len-off);
1461 }
1462
1463 /* Return the count of bytes in transmit buffer
1464 */
1465 static int chars_in_buffer(struct tty_struct *tty)
1466 {
1467 SLMP_INFO *info = tty->driver_data;
1468
1469 if (sanity_check(info, tty->name, "chars_in_buffer"))
1470 return 0;
1471
1472 if (debug_level >= DEBUG_LEVEL_INFO)
1473 printk("%s(%d):%s chars_in_buffer()=%d\n",
1474 __FILE__, __LINE__, info->device_name, info->tx_count);
1475
1476 return info->tx_count;
1477 }
1478
1479 /* Signal remote device to throttle send data (our receive data)
1480 */
1481 static void throttle(struct tty_struct * tty)
1482 {
1483 SLMP_INFO *info = tty->driver_data;
1484 unsigned long flags;
1485
1486 if (debug_level >= DEBUG_LEVEL_INFO)
1487 printk("%s(%d):%s throttle() entry\n",
1488 __FILE__,__LINE__, info->device_name );
1489
1490 if (sanity_check(info, tty->name, "throttle"))
1491 return;
1492
1493 if (I_IXOFF(tty))
1494 send_xchar(tty, STOP_CHAR(tty));
1495
1496 if (tty->termios->c_cflag & CRTSCTS) {
1497 spin_lock_irqsave(&info->lock,flags);
1498 info->serial_signals &= ~SerialSignal_RTS;
1499 set_signals(info);
1500 spin_unlock_irqrestore(&info->lock,flags);
1501 }
1502 }
1503
1504 /* Signal remote device to stop throttling send data (our receive data)
1505 */
1506 static void unthrottle(struct tty_struct * tty)
1507 {
1508 SLMP_INFO *info = tty->driver_data;
1509 unsigned long flags;
1510
1511 if (debug_level >= DEBUG_LEVEL_INFO)
1512 printk("%s(%d):%s unthrottle() entry\n",
1513 __FILE__,__LINE__, info->device_name );
1514
1515 if (sanity_check(info, tty->name, "unthrottle"))
1516 return;
1517
1518 if (I_IXOFF(tty)) {
1519 if (info->x_char)
1520 info->x_char = 0;
1521 else
1522 send_xchar(tty, START_CHAR(tty));
1523 }
1524
1525 if (tty->termios->c_cflag & CRTSCTS) {
1526 spin_lock_irqsave(&info->lock,flags);
1527 info->serial_signals |= SerialSignal_RTS;
1528 set_signals(info);
1529 spin_unlock_irqrestore(&info->lock,flags);
1530 }
1531 }
1532
1533 /* set or clear transmit break condition
1534 * break_state -1=set break condition, 0=clear
1535 */
1536 static int set_break(struct tty_struct *tty, int break_state)
1537 {
1538 unsigned char RegValue;
1539 SLMP_INFO * info = tty->driver_data;
1540 unsigned long flags;
1541
1542 if (debug_level >= DEBUG_LEVEL_INFO)
1543 printk("%s(%d):%s set_break(%d)\n",
1544 __FILE__,__LINE__, info->device_name, break_state);
1545
1546 if (sanity_check(info, tty->name, "set_break"))
1547 return -EINVAL;
1548
1549 spin_lock_irqsave(&info->lock,flags);
1550 RegValue = read_reg(info, CTL);
1551 if (break_state == -1)
1552 RegValue |= BIT3;
1553 else
1554 RegValue &= ~BIT3;
1555 write_reg(info, CTL, RegValue);
1556 spin_unlock_irqrestore(&info->lock,flags);
1557 return 0;
1558 }
1559
1560 #if SYNCLINK_GENERIC_HDLC
1561
1562 /**
1563 * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
1564 * set encoding and frame check sequence (FCS) options
1565 *
1566 * dev pointer to network device structure
1567 * encoding serial encoding setting
1568 * parity FCS setting
1569 *
1570 * returns 0 if success, otherwise error code
1571 */
1572 static int hdlcdev_attach(struct net_device *dev, unsigned short encoding,
1573 unsigned short parity)
1574 {
1575 SLMP_INFO *info = dev_to_port(dev);
1576 unsigned char new_encoding;
1577 unsigned short new_crctype;
1578
1579 /* return error if TTY interface open */
1580 if (info->port.count)
1581 return -EBUSY;
1582
1583 switch (encoding)
1584 {
1585 case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break;
1586 case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break;
1587 case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break;
1588 case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break;
1589 case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break;
1590 default: return -EINVAL;
1591 }
1592
1593 switch (parity)
1594 {
1595 case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break;
1596 case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break;
1597 case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break;
1598 default: return -EINVAL;
1599 }
1600
1601 info->params.encoding = new_encoding;
1602 info->params.crc_type = new_crctype;
1603
1604 /* if network interface up, reprogram hardware */
1605 if (info->netcount)
1606 program_hw(info);
1607
1608 return 0;
1609 }
1610
1611 /**
1612 * called by generic HDLC layer to send frame
1613 *
1614 * skb socket buffer containing HDLC frame
1615 * dev pointer to network device structure
1616 *
1617 * returns 0 if success, otherwise error code
1618 */
1619 static int hdlcdev_xmit(struct sk_buff *skb, struct net_device *dev)
1620 {
1621 SLMP_INFO *info = dev_to_port(dev);
1622 unsigned long flags;
1623
1624 if (debug_level >= DEBUG_LEVEL_INFO)
1625 printk(KERN_INFO "%s:hdlc_xmit(%s)\n",__FILE__,dev->name);
1626
1627 /* stop sending until this frame completes */
1628 netif_stop_queue(dev);
1629
1630 /* copy data to device buffers */
1631 info->tx_count = skb->len;
1632 tx_load_dma_buffer(info, skb->data, skb->len);
1633
1634 /* update network statistics */
1635 dev->stats.tx_packets++;
1636 dev->stats.tx_bytes += skb->len;
1637
1638 /* done with socket buffer, so free it */
1639 dev_kfree_skb(skb);
1640
1641 /* save start time for transmit timeout detection */
1642 dev->trans_start = jiffies;
1643
1644 /* start hardware transmitter if necessary */
1645 spin_lock_irqsave(&info->lock,flags);
1646 if (!info->tx_active)
1647 tx_start(info);
1648 spin_unlock_irqrestore(&info->lock,flags);
1649
1650 return 0;
1651 }
1652
1653 /**
1654 * called by network layer when interface enabled
1655 * claim resources and initialize hardware
1656 *
1657 * dev pointer to network device structure
1658 *
1659 * returns 0 if success, otherwise error code
1660 */
1661 static int hdlcdev_open(struct net_device *dev)
1662 {
1663 SLMP_INFO *info = dev_to_port(dev);
1664 int rc;
1665 unsigned long flags;
1666
1667 if (debug_level >= DEBUG_LEVEL_INFO)
1668 printk("%s:hdlcdev_open(%s)\n",__FILE__,dev->name);
1669
1670 /* generic HDLC layer open processing */
1671 if ((rc = hdlc_open(dev)))
1672 return rc;
1673
1674 /* arbitrate between network and tty opens */
1675 spin_lock_irqsave(&info->netlock, flags);
1676 if (info->port.count != 0 || info->netcount != 0) {
1677 printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name);
1678 spin_unlock_irqrestore(&info->netlock, flags);
1679 return -EBUSY;
1680 }
1681 info->netcount=1;
1682 spin_unlock_irqrestore(&info->netlock, flags);
1683
1684 /* claim resources and init adapter */
1685 if ((rc = startup(info)) != 0) {
1686 spin_lock_irqsave(&info->netlock, flags);
1687 info->netcount=0;
1688 spin_unlock_irqrestore(&info->netlock, flags);
1689 return rc;
1690 }
1691
1692 /* assert DTR and RTS, apply hardware settings */
1693 info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
1694 program_hw(info);
1695
1696 /* enable network layer transmit */
1697 dev->trans_start = jiffies;
1698 netif_start_queue(dev);
1699
1700 /* inform generic HDLC layer of current DCD status */
1701 spin_lock_irqsave(&info->lock, flags);
1702 get_signals(info);
1703 spin_unlock_irqrestore(&info->lock, flags);
1704 if (info->serial_signals & SerialSignal_DCD)
1705 netif_carrier_on(dev);
1706 else
1707 netif_carrier_off(dev);
1708 return 0;
1709 }
1710
1711 /**
1712 * called by network layer when interface is disabled
1713 * shutdown hardware and release resources
1714 *
1715 * dev pointer to network device structure
1716 *
1717 * returns 0 if success, otherwise error code
1718 */
1719 static int hdlcdev_close(struct net_device *dev)
1720 {
1721 SLMP_INFO *info = dev_to_port(dev);
1722 unsigned long flags;
1723
1724 if (debug_level >= DEBUG_LEVEL_INFO)
1725 printk("%s:hdlcdev_close(%s)\n",__FILE__,dev->name);
1726
1727 netif_stop_queue(dev);
1728
1729 /* shutdown adapter and release resources */
1730 shutdown(info);
1731
1732 hdlc_close(dev);
1733
1734 spin_lock_irqsave(&info->netlock, flags);
1735 info->netcount=0;
1736 spin_unlock_irqrestore(&info->netlock, flags);
1737
1738 return 0;
1739 }
1740
1741 /**
1742 * called by network layer to process IOCTL call to network device
1743 *
1744 * dev pointer to network device structure
1745 * ifr pointer to network interface request structure
1746 * cmd IOCTL command code
1747 *
1748 * returns 0 if success, otherwise error code
1749 */
1750 static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1751 {
1752 const size_t size = sizeof(sync_serial_settings);
1753 sync_serial_settings new_line;
1754 sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync;
1755 SLMP_INFO *info = dev_to_port(dev);
1756 unsigned int flags;
1757
1758 if (debug_level >= DEBUG_LEVEL_INFO)
1759 printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name);
1760
1761 /* return error if TTY interface open */
1762 if (info->port.count)
1763 return -EBUSY;
1764
1765 if (cmd != SIOCWANDEV)
1766 return hdlc_ioctl(dev, ifr, cmd);
1767
1768 switch(ifr->ifr_settings.type) {
1769 case IF_GET_IFACE: /* return current sync_serial_settings */
1770
1771 ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL;
1772 if (ifr->ifr_settings.size < size) {
1773 ifr->ifr_settings.size = size; /* data size wanted */
1774 return -ENOBUFS;
1775 }
1776
1777 flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
1778 HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
1779 HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
1780 HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
1781
1782 switch (flags){
1783 case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break;
1784 case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break;
1785 case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break;
1786 case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break;
1787 default: new_line.clock_type = CLOCK_DEFAULT;
1788 }
1789
1790 new_line.clock_rate = info->params.clock_speed;
1791 new_line.loopback = info->params.loopback ? 1:0;
1792
1793 if (copy_to_user(line, &new_line, size))
1794 return -EFAULT;
1795 return 0;
1796
1797 case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */
1798
1799 if(!capable(CAP_NET_ADMIN))
1800 return -EPERM;
1801 if (copy_from_user(&new_line, line, size))
1802 return -EFAULT;
1803
1804 switch (new_line.clock_type)
1805 {
1806 case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break;
1807 case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break;
1808 case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break;
1809 case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break;
1810 case CLOCK_DEFAULT: flags = info->params.flags &
1811 (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
1812 HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
1813 HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
1814 HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break;
1815 default: return -EINVAL;
1816 }
1817
1818 if (new_line.loopback != 0 && new_line.loopback != 1)
1819 return -EINVAL;
1820
1821 info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
1822 HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
1823 HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
1824 HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
1825 info->params.flags |= flags;
1826
1827 info->params.loopback = new_line.loopback;
1828
1829 if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG))
1830 info->params.clock_speed = new_line.clock_rate;
1831 else
1832 info->params.clock_speed = 0;
1833
1834 /* if network interface up, reprogram hardware */
1835 if (info->netcount)
1836 program_hw(info);
1837 return 0;
1838
1839 default:
1840 return hdlc_ioctl(dev, ifr, cmd);
1841 }
1842 }
1843
1844 /**
1845 * called by network layer when transmit timeout is detected
1846 *
1847 * dev pointer to network device structure
1848 */
1849 static void hdlcdev_tx_timeout(struct net_device *dev)
1850 {
1851 SLMP_INFO *info = dev_to_port(dev);
1852 unsigned long flags;
1853
1854 if (debug_level >= DEBUG_LEVEL_INFO)
1855 printk("hdlcdev_tx_timeout(%s)\n",dev->name);
1856
1857 dev->stats.tx_errors++;
1858 dev->stats.tx_aborted_errors++;
1859
1860 spin_lock_irqsave(&info->lock,flags);
1861 tx_stop(info);
1862 spin_unlock_irqrestore(&info->lock,flags);
1863
1864 netif_wake_queue(dev);
1865 }
1866
1867 /**
1868 * called by device driver when transmit completes
1869 * reenable network layer transmit if stopped
1870 *
1871 * info pointer to device instance information
1872 */
1873 static void hdlcdev_tx_done(SLMP_INFO *info)
1874 {
1875 if (netif_queue_stopped(info->netdev))
1876 netif_wake_queue(info->netdev);
1877 }
1878
1879 /**
1880 * called by device driver when frame received
1881 * pass frame to network layer
1882 *
1883 * info pointer to device instance information
1884 * buf pointer to buffer contianing frame data
1885 * size count of data bytes in buf
1886 */
1887 static void hdlcdev_rx(SLMP_INFO *info, char *buf, int size)
1888 {
1889 struct sk_buff *skb = dev_alloc_skb(size);
1890 struct net_device *dev = info->netdev;
1891
1892 if (debug_level >= DEBUG_LEVEL_INFO)
1893 printk("hdlcdev_rx(%s)\n",dev->name);
1894
1895 if (skb == NULL) {
1896 printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n",
1897 dev->name);
1898 dev->stats.rx_dropped++;
1899 return;
1900 }
1901
1902 memcpy(skb_put(skb, size), buf, size);
1903
1904 skb->protocol = hdlc_type_trans(skb, dev);
1905
1906 dev->stats.rx_packets++;
1907 dev->stats.rx_bytes += size;
1908
1909 netif_rx(skb);
1910 }
1911
1912 static const struct net_device_ops hdlcdev_ops = {
1913 .ndo_open = hdlcdev_open,
1914 .ndo_stop = hdlcdev_close,
1915 .ndo_change_mtu = hdlc_change_mtu,
1916 .ndo_start_xmit = hdlc_start_xmit,
1917 .ndo_do_ioctl = hdlcdev_ioctl,
1918 .ndo_tx_timeout = hdlcdev_tx_timeout,
1919 };
1920
1921 /**
1922 * called by device driver when adding device instance
1923 * do generic HDLC initialization
1924 *
1925 * info pointer to device instance information
1926 *
1927 * returns 0 if success, otherwise error code
1928 */
1929 static int hdlcdev_init(SLMP_INFO *info)
1930 {
1931 int rc;
1932 struct net_device *dev;
1933 hdlc_device *hdlc;
1934
1935 /* allocate and initialize network and HDLC layer objects */
1936
1937 if (!(dev = alloc_hdlcdev(info))) {
1938 printk(KERN_ERR "%s:hdlc device allocation failure\n",__FILE__);
1939 return -ENOMEM;
1940 }
1941
1942 /* for network layer reporting purposes only */
1943 dev->mem_start = info->phys_sca_base;
1944 dev->mem_end = info->phys_sca_base + SCA_BASE_SIZE - 1;
1945 dev->irq = info->irq_level;
1946
1947 /* network layer callbacks and settings */
1948 dev->netdev_ops = &hdlcdev_ops;
1949 dev->watchdog_timeo = 10 * HZ;
1950 dev->tx_queue_len = 50;
1951
1952 /* generic HDLC layer callbacks and settings */
1953 hdlc = dev_to_hdlc(dev);
1954 hdlc->attach = hdlcdev_attach;
1955 hdlc->xmit = hdlcdev_xmit;
1956
1957 /* register objects with HDLC layer */
1958 if ((rc = register_hdlc_device(dev))) {
1959 printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__);
1960 free_netdev(dev);
1961 return rc;
1962 }
1963
1964 info->netdev = dev;
1965 return 0;
1966 }
1967
1968 /**
1969 * called by device driver when removing device instance
1970 * do generic HDLC cleanup
1971 *
1972 * info pointer to device instance information
1973 */
1974 static void hdlcdev_exit(SLMP_INFO *info)
1975 {
1976 unregister_hdlc_device(info->netdev);
1977 free_netdev(info->netdev);
1978 info->netdev = NULL;
1979 }
1980
1981 #endif /* CONFIG_HDLC */
1982
1983
1984 /* Return next bottom half action to perform.
1985 * Return Value: BH action code or 0 if nothing to do.
1986 */
1987 static int bh_action(SLMP_INFO *info)
1988 {
1989 unsigned long flags;
1990 int rc = 0;
1991
1992 spin_lock_irqsave(&info->lock,flags);
1993
1994 if (info->pending_bh & BH_RECEIVE) {
1995 info->pending_bh &= ~BH_RECEIVE;
1996 rc = BH_RECEIVE;
1997 } else if (info->pending_bh & BH_TRANSMIT) {
1998 info->pending_bh &= ~BH_TRANSMIT;
1999 rc = BH_TRANSMIT;
2000 } else if (info->pending_bh & BH_STATUS) {
2001 info->pending_bh &= ~BH_STATUS;
2002 rc = BH_STATUS;
2003 }
2004
2005 if (!rc) {
2006 /* Mark BH routine as complete */
2007 info->bh_running = false;
2008 info->bh_requested = false;
2009 }
2010
2011 spin_unlock_irqrestore(&info->lock,flags);
2012
2013 return rc;
2014 }
2015
2016 /* Perform bottom half processing of work items queued by ISR.
2017 */
2018 static void bh_handler(struct work_struct *work)
2019 {
2020 SLMP_INFO *info = container_of(work, SLMP_INFO, task);
2021 int action;
2022
2023 if (!info)
2024 return;
2025
2026 if ( debug_level >= DEBUG_LEVEL_BH )
2027 printk( "%s(%d):%s bh_handler() entry\n",
2028 __FILE__,__LINE__,info->device_name);
2029
2030 info->bh_running = true;
2031
2032 while((action = bh_action(info)) != 0) {
2033
2034 /* Process work item */
2035 if ( debug_level >= DEBUG_LEVEL_BH )
2036 printk( "%s(%d):%s bh_handler() work item action=%d\n",
2037 __FILE__,__LINE__,info->device_name, action);
2038
2039 switch (action) {
2040
2041 case BH_RECEIVE:
2042 bh_receive(info);
2043 break;
2044 case BH_TRANSMIT:
2045 bh_transmit(info);
2046 break;
2047 case BH_STATUS:
2048 bh_status(info);
2049 break;
2050 default:
2051 /* unknown work item ID */
2052 printk("%s(%d):%s Unknown work item ID=%08X!\n",
2053 __FILE__,__LINE__,info->device_name,action);
2054 break;
2055 }
2056 }
2057
2058 if ( debug_level >= DEBUG_LEVEL_BH )
2059 printk( "%s(%d):%s bh_handler() exit\n",
2060 __FILE__,__LINE__,info->device_name);
2061 }
2062
2063 static void bh_receive(SLMP_INFO *info)
2064 {
2065 if ( debug_level >= DEBUG_LEVEL_BH )
2066 printk( "%s(%d):%s bh_receive()\n",
2067 __FILE__,__LINE__,info->device_name);
2068
2069 while( rx_get_frame(info) );
2070 }
2071
2072 static void bh_transmit(SLMP_INFO *info)
2073 {
2074 struct tty_struct *tty = info->port.tty;
2075
2076 if ( debug_level >= DEBUG_LEVEL_BH )
2077 printk( "%s(%d):%s bh_transmit() entry\n",
2078 __FILE__,__LINE__,info->device_name);
2079
2080 if (tty)
2081 tty_wakeup(tty);
2082 }
2083
2084 static void bh_status(SLMP_INFO *info)
2085 {
2086 if ( debug_level >= DEBUG_LEVEL_BH )
2087 printk( "%s(%d):%s bh_status() entry\n",
2088 __FILE__,__LINE__,info->device_name);
2089
2090 info->ri_chkcount = 0;
2091 info->dsr_chkcount = 0;
2092 info->dcd_chkcount = 0;
2093 info->cts_chkcount = 0;
2094 }
2095
2096 static void isr_timer(SLMP_INFO * info)
2097 {
2098 unsigned char timer = (info->port_num & 1) ? TIMER2 : TIMER0;
2099
2100 /* IER2<7..4> = timer<3..0> interrupt enables (0=disabled) */
2101 write_reg(info, IER2, 0);
2102
2103 /* TMCS, Timer Control/Status Register
2104 *
2105 * 07 CMF, Compare match flag (read only) 1=match
2106 * 06 ECMI, CMF Interrupt Enable: 0=disabled
2107 * 05 Reserved, must be 0
2108 * 04 TME, Timer Enable
2109 * 03..00 Reserved, must be 0
2110 *
2111 * 0000 0000
2112 */
2113 write_reg(info, (unsigned char)(timer + TMCS), 0);
2114
2115 info->irq_occurred = true;
2116
2117 if ( debug_level >= DEBUG_LEVEL_ISR )
2118 printk("%s(%d):%s isr_timer()\n",
2119 __FILE__,__LINE__,info->device_name);
2120 }
2121
2122 static void isr_rxint(SLMP_INFO * info)
2123 {
2124 struct tty_struct *tty = info->port.tty;
2125 struct mgsl_icount *icount = &info->icount;
2126 unsigned char status = read_reg(info, SR1) & info->ie1_value & (FLGD + IDLD + CDCD + BRKD);
2127 unsigned char status2 = read_reg(info, SR2) & info->ie2_value & OVRN;
2128
2129 /* clear status bits */
2130 if (status)
2131 write_reg(info, SR1, status);
2132
2133 if (status2)
2134 write_reg(info, SR2, status2);
2135
2136 if ( debug_level >= DEBUG_LEVEL_ISR )
2137 printk("%s(%d):%s isr_rxint status=%02X %02x\n",
2138 __FILE__,__LINE__,info->device_name,status,status2);
2139
2140 if (info->params.mode == MGSL_MODE_ASYNC) {
2141 if (status & BRKD) {
2142 icount->brk++;
2143
2144 /* process break detection if tty control
2145 * is not set to ignore it
2146 */
2147 if ( tty ) {
2148 if (!(status & info->ignore_status_mask1)) {
2149 if (info->read_status_mask1 & BRKD) {
2150 tty_insert_flip_char(tty, 0, TTY_BREAK);
2151 if (info->port.flags & ASYNC_SAK)
2152 do_SAK(tty);
2153 }
2154 }
2155 }
2156 }
2157 }
2158 else {
2159 if (status & (FLGD|IDLD)) {
2160 if (status & FLGD)
2161 info->icount.exithunt++;
2162 else if (status & IDLD)
2163 info->icount.rxidle++;
2164 wake_up_interruptible(&info->event_wait_q);
2165 }
2166 }
2167
2168 if (status & CDCD) {
2169 /* simulate a common modem status change interrupt
2170 * for our handler
2171 */
2172 get_signals( info );
2173 isr_io_pin(info,
2174 MISCSTATUS_DCD_LATCHED|(info->serial_signals&SerialSignal_DCD));
2175 }
2176 }
2177
2178 /*
2179 * handle async rx data interrupts
2180 */
2181 static void isr_rxrdy(SLMP_INFO * info)
2182 {
2183 u16 status;
2184 unsigned char DataByte;
2185 struct tty_struct *tty = info->port.tty;
2186 struct mgsl_icount *icount = &info->icount;
2187
2188 if ( debug_level >= DEBUG_LEVEL_ISR )
2189 printk("%s(%d):%s isr_rxrdy\n",
2190 __FILE__,__LINE__,info->device_name);
2191
2192 while((status = read_reg(info,CST0)) & BIT0)
2193 {
2194 int flag = 0;
2195 bool over = false;
2196 DataByte = read_reg(info,TRB);
2197
2198 icount->rx++;
2199
2200 if ( status & (PE + FRME + OVRN) ) {
2201 printk("%s(%d):%s rxerr=%04X\n",
2202 __FILE__,__LINE__,info->device_name,status);
2203
2204 /* update error statistics */
2205 if (status & PE)
2206 icount->parity++;
2207 else if (status & FRME)
2208 icount->frame++;
2209 else if (status & OVRN)
2210 icount->overrun++;
2211
2212 /* discard char if tty control flags say so */
2213 if (status & info->ignore_status_mask2)
2214 continue;
2215
2216 status &= info->read_status_mask2;
2217
2218 if ( tty ) {
2219 if (status & PE)
2220 flag = TTY_PARITY;
2221 else if (status & FRME)
2222 flag = TTY_FRAME;
2223 if (status & OVRN) {
2224 /* Overrun is special, since it's
2225 * reported immediately, and doesn't
2226 * affect the current character
2227 */
2228 over = true;
2229 }
2230 }
2231 } /* end of if (error) */
2232
2233 if ( tty ) {
2234 tty_insert_flip_char(tty, DataByte, flag);
2235 if (over)
2236 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
2237 }
2238 }
2239
2240 if ( debug_level >= DEBUG_LEVEL_ISR ) {
2241 printk("%s(%d):%s rx=%d brk=%d parity=%d frame=%d overrun=%d\n",
2242 __FILE__,__LINE__,info->device_name,
2243 icount->rx,icount->brk,icount->parity,
2244 icount->frame,icount->overrun);
2245 }
2246
2247 if ( tty )
2248 tty_flip_buffer_push(tty);
2249 }
2250
2251 static void isr_txeom(SLMP_INFO * info, unsigned char status)
2252 {
2253 if ( debug_level >= DEBUG_LEVEL_ISR )
2254 printk("%s(%d):%s isr_txeom status=%02x\n",
2255 __FILE__,__LINE__,info->device_name,status);
2256
2257 write_reg(info, TXDMA + DIR, 0x00); /* disable Tx DMA IRQs */
2258 write_reg(info, TXDMA + DSR, 0xc0); /* clear IRQs and disable DMA */
2259 write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
2260
2261 if (status & UDRN) {
2262 write_reg(info, CMD, TXRESET);
2263 write_reg(info, CMD, TXENABLE);
2264 } else
2265 write_reg(info, CMD, TXBUFCLR);
2266
2267 /* disable and clear tx interrupts */
2268 info->ie0_value &= ~TXRDYE;
2269 info->ie1_value &= ~(IDLE + UDRN);
2270 write_reg16(info, IE0, (unsigned short)((info->ie1_value << 8) + info->ie0_value));
2271 write_reg(info, SR1, (unsigned char)(UDRN + IDLE));
2272
2273 if ( info->tx_active ) {
2274 if (info->params.mode != MGSL_MODE_ASYNC) {
2275 if (status & UDRN)
2276 info->icount.txunder++;
2277 else if (status & IDLE)
2278 info->icount.txok++;
2279 }
2280
2281 info->tx_active = false;
2282 info->tx_count = info->tx_put = info->tx_get = 0;
2283
2284 del_timer(&info->tx_timer);
2285
2286 if (info->params.mode != MGSL_MODE_ASYNC && info->drop_rts_on_tx_done ) {
2287 info->serial_signals &= ~SerialSignal_RTS;
2288 info->drop_rts_on_tx_done = false;
2289 set_signals(info);
2290 }
2291
2292 #if SYNCLINK_GENERIC_HDLC
2293 if (info->netcount)
2294 hdlcdev_tx_done(info);
2295 else
2296 #endif
2297 {
2298 if (info->port.tty && (info->port.tty->stopped || info->port.tty->hw_stopped)) {
2299 tx_stop(info);
2300 return;
2301 }
2302 info->pending_bh |= BH_TRANSMIT;
2303 }
2304 }
2305 }
2306
2307
2308 /*
2309 * handle tx status interrupts
2310 */
2311 static void isr_txint(SLMP_INFO * info)
2312 {
2313 unsigned char status = read_reg(info, SR1) & info->ie1_value & (UDRN + IDLE + CCTS);
2314
2315 /* clear status bits */
2316 write_reg(info, SR1, status);
2317
2318 if ( debug_level >= DEBUG_LEVEL_ISR )
2319 printk("%s(%d):%s isr_txint status=%02x\n",
2320 __FILE__,__LINE__,info->device_name,status);
2321
2322 if (status & (UDRN + IDLE))
2323 isr_txeom(info, status);
2324
2325 if (status & CCTS) {
2326 /* simulate a common modem status change interrupt
2327 * for our handler
2328 */
2329 get_signals( info );
2330 isr_io_pin(info,
2331 MISCSTATUS_CTS_LATCHED|(info->serial_signals&SerialSignal_CTS));
2332
2333 }
2334 }
2335
2336 /*
2337 * handle async tx data interrupts
2338 */
2339 static void isr_txrdy(SLMP_INFO * info)
2340 {
2341 if ( debug_level >= DEBUG_LEVEL_ISR )
2342 printk("%s(%d):%s isr_txrdy() tx_count=%d\n",
2343 __FILE__,__LINE__,info->device_name,info->tx_count);
2344
2345 if (info->params.mode != MGSL_MODE_ASYNC) {
2346 /* disable TXRDY IRQ, enable IDLE IRQ */
2347 info->ie0_value &= ~TXRDYE;
2348 info->ie1_value |= IDLE;
2349 write_reg16(info, IE0, (unsigned short)((info->ie1_value << 8) + info->ie0_value));
2350 return;
2351 }
2352
2353 if (info->port.tty && (info->port.tty->stopped || info->port.tty->hw_stopped)) {
2354 tx_stop(info);
2355 return;
2356 }
2357
2358 if ( info->tx_count )
2359 tx_load_fifo( info );
2360 else {
2361 info->tx_active = false;
2362 info->ie0_value &= ~TXRDYE;
2363 write_reg(info, IE0, info->ie0_value);
2364 }
2365
2366 if (info->tx_count < WAKEUP_CHARS)
2367 info->pending_bh |= BH_TRANSMIT;
2368 }
2369
2370 static void isr_rxdmaok(SLMP_INFO * info)
2371 {
2372 /* BIT7 = EOT (end of transfer)
2373 * BIT6 = EOM (end of message/frame)
2374 */
2375 unsigned char status = read_reg(info,RXDMA + DSR) & 0xc0;
2376
2377 /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */
2378 write_reg(info, RXDMA + DSR, (unsigned char)(status | 1));
2379
2380 if ( debug_level >= DEBUG_LEVEL_ISR )
2381 printk("%s(%d):%s isr_rxdmaok(), status=%02x\n",
2382 __FILE__,__LINE__,info->device_name,status);
2383
2384 info->pending_bh |= BH_RECEIVE;
2385 }
2386
2387 static void isr_rxdmaerror(SLMP_INFO * info)
2388 {
2389 /* BIT5 = BOF (buffer overflow)
2390 * BIT4 = COF (counter overflow)
2391 */
2392 unsigned char status = read_reg(info,RXDMA + DSR) & 0x30;
2393
2394 /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */
2395 write_reg(info, RXDMA + DSR, (unsigned char)(status | 1));
2396
2397 if ( debug_level >= DEBUG_LEVEL_ISR )
2398 printk("%s(%d):%s isr_rxdmaerror(), status=%02x\n",
2399 __FILE__,__LINE__,info->device_name,status);
2400
2401 info->rx_overflow = true;
2402 info->pending_bh |= BH_RECEIVE;
2403 }
2404
2405 static void isr_txdmaok(SLMP_INFO * info)
2406 {
2407 unsigned char status_reg1 = read_reg(info, SR1);
2408
2409 write_reg(info, TXDMA + DIR, 0x00); /* disable Tx DMA IRQs */
2410 write_reg(info, TXDMA + DSR, 0xc0); /* clear IRQs and disable DMA */
2411 write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
2412
2413 if ( debug_level >= DEBUG_LEVEL_ISR )
2414 printk("%s(%d):%s isr_txdmaok(), status=%02x\n",
2415 __FILE__,__LINE__,info->device_name,status_reg1);
2416
2417 /* program TXRDY as FIFO empty flag, enable TXRDY IRQ */
2418 write_reg16(info, TRC0, 0);
2419 info->ie0_value |= TXRDYE;
2420 write_reg(info, IE0, info->ie0_value);
2421 }
2422
2423 static void isr_txdmaerror(SLMP_INFO * info)
2424 {
2425 /* BIT5 = BOF (buffer overflow)
2426 * BIT4 = COF (counter overflow)
2427 */
2428 unsigned char status = read_reg(info,TXDMA + DSR) & 0x30;
2429
2430 /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */
2431 write_reg(info, TXDMA + DSR, (unsigned char)(status | 1));
2432
2433 if ( debug_level >= DEBUG_LEVEL_ISR )
2434 printk("%s(%d):%s isr_txdmaerror(), status=%02x\n",
2435 __FILE__,__LINE__,info->device_name,status);
2436 }
2437
2438 /* handle input serial signal changes
2439 */
2440 static void isr_io_pin( SLMP_INFO *info, u16 status )
2441 {
2442 struct mgsl_icount *icount;
2443
2444 if ( debug_level >= DEBUG_LEVEL_ISR )
2445 printk("%s(%d):isr_io_pin status=%04X\n",
2446 __FILE__,__LINE__,status);
2447
2448 if (status & (MISCSTATUS_CTS_LATCHED | MISCSTATUS_DCD_LATCHED |
2449 MISCSTATUS_DSR_LATCHED | MISCSTATUS_RI_LATCHED) ) {
2450 icount = &info->icount;
2451 /* update input line counters */
2452 if (status & MISCSTATUS_RI_LATCHED) {
2453 icount->rng++;
2454 if ( status & SerialSignal_RI )
2455 info->input_signal_events.ri_up++;
2456 else
2457 info->input_signal_events.ri_down++;
2458 }
2459 if (status & MISCSTATUS_DSR_LATCHED) {
2460 icount->dsr++;
2461 if ( status & SerialSignal_DSR )
2462 info->input_signal_events.dsr_up++;
2463 else
2464 info->input_signal_events.dsr_down++;
2465 }
2466 if (status & MISCSTATUS_DCD_LATCHED) {
2467 if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) {
2468 info->ie1_value &= ~CDCD;
2469 write_reg(info, IE1, info->ie1_value);
2470 }
2471 icount->dcd++;
2472 if (status & SerialSignal_DCD) {
2473 info->input_signal_events.dcd_up++;
2474 } else
2475 info->input_signal_events.dcd_down++;
2476 #if SYNCLINK_GENERIC_HDLC
2477 if (info->netcount) {
2478 if (status & SerialSignal_DCD)
2479 netif_carrier_on(info->netdev);
2480 else
2481 netif_carrier_off(info->netdev);
2482 }
2483 #endif
2484 }
2485 if (status & MISCSTATUS_CTS_LATCHED)
2486 {
2487 if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) {
2488 info->ie1_value &= ~CCTS;
2489 write_reg(info, IE1, info->ie1_value);
2490 }
2491 icount->cts++;
2492 if ( status & SerialSignal_CTS )
2493 info->input_signal_events.cts_up++;
2494 else
2495 info->input_signal_events.cts_down++;
2496 }
2497 wake_up_interruptible(&info->status_event_wait_q);
2498 wake_up_interruptible(&info->event_wait_q);
2499
2500 if ( (info->port.flags & ASYNC_CHECK_CD) &&
2501 (status & MISCSTATUS_DCD_LATCHED) ) {
2502 if ( debug_level >= DEBUG_LEVEL_ISR )
2503 printk("%s CD now %s...", info->device_name,
2504 (status & SerialSignal_DCD) ? "on" : "off");
2505 if (status & SerialSignal_DCD)
2506 wake_up_interruptible(&info->port.open_wait);
2507 else {
2508 if ( debug_level >= DEBUG_LEVEL_ISR )
2509 printk("doing serial hangup...");
2510 if (info->port.tty)
2511 tty_hangup(info->port.tty);
2512 }
2513 }
2514
2515 if ( (info->port.flags & ASYNC_CTS_FLOW) &&
2516 (status & MISCSTATUS_CTS_LATCHED) ) {
2517 if ( info->port.tty ) {
2518 if (info->port.tty->hw_stopped) {
2519 if (status & SerialSignal_CTS) {
2520 if ( debug_level >= DEBUG_LEVEL_ISR )
2521 printk("CTS tx start...");
2522 info->port.tty->hw_stopped = 0;
2523 tx_start(info);
2524 info->pending_bh |= BH_TRANSMIT;
2525 return;
2526 }
2527 } else {
2528 if (!(status & SerialSignal_CTS)) {
2529 if ( debug_level >= DEBUG_LEVEL_ISR )
2530 printk("CTS tx stop...");
2531 info->port.tty->hw_stopped = 1;
2532 tx_stop(info);
2533 }
2534 }
2535 }
2536 }
2537 }
2538
2539 info->pending_bh |= BH_STATUS;
2540 }
2541
2542 /* Interrupt service routine entry point.
2543 *
2544 * Arguments:
2545 * irq interrupt number that caused interrupt
2546 * dev_id device ID supplied during interrupt registration
2547 * regs interrupted processor context
2548 */
2549 static irqreturn_t synclinkmp_interrupt(int dummy, void *dev_id)
2550 {
2551 SLMP_INFO *info = dev_id;
2552 unsigned char status, status0, status1=0;
2553 unsigned char dmastatus, dmastatus0, dmastatus1=0;
2554 unsigned char timerstatus0, timerstatus1=0;
2555 unsigned char shift;
2556 unsigned int i;
2557 unsigned short tmp;
2558
2559 if ( debug_level >= DEBUG_LEVEL_ISR )
2560 printk(KERN_DEBUG "%s(%d): synclinkmp_interrupt(%d)entry.\n",
2561 __FILE__, __LINE__, info->irq_level);
2562
2563 spin_lock(&info->lock);
2564
2565 for(;;) {
2566
2567 /* get status for SCA0 (ports 0-1) */
2568 tmp = read_reg16(info, ISR0); /* get ISR0 and ISR1 in one read */
2569 status0 = (unsigned char)tmp;
2570 dmastatus0 = (unsigned char)(tmp>>8);
2571 timerstatus0 = read_reg(info, ISR2);
2572
2573 if ( debug_level >= DEBUG_LEVEL_ISR )
2574 printk(KERN_DEBUG "%s(%d):%s status0=%02x, dmastatus0=%02x, timerstatus0=%02x\n",
2575 __FILE__, __LINE__, info->device_name,
2576 status0, dmastatus0, timerstatus0);
2577
2578 if (info->port_count == 4) {
2579 /* get status for SCA1 (ports 2-3) */
2580 tmp = read_reg16(info->port_array[2], ISR0);
2581 status1 = (unsigned char)tmp;
2582 dmastatus1 = (unsigned char)(tmp>>8);
2583 timerstatus1 = read_reg(info->port_array[2], ISR2);
2584
2585 if ( debug_level >= DEBUG_LEVEL_ISR )
2586 printk("%s(%d):%s status1=%02x, dmastatus1=%02x, timerstatus1=%02x\n",
2587 __FILE__,__LINE__,info->device_name,
2588 status1,dmastatus1,timerstatus1);
2589 }
2590
2591 if (!status0 && !dmastatus0 && !timerstatus0 &&
2592 !status1 && !dmastatus1 && !timerstatus1)
2593 break;
2594
2595 for(i=0; i < info->port_count ; i++) {
2596 if (info->port_array[i] == NULL)
2597 continue;
2598 if (i < 2) {
2599 status = status0;
2600 dmastatus = dmastatus0;
2601 } else {
2602 status = status1;
2603 dmastatus = dmastatus1;
2604 }
2605
2606 shift = i & 1 ? 4 :0;
2607
2608 if (status & BIT0 << shift)
2609 isr_rxrdy(info->port_array[i]);
2610 if (status & BIT1 << shift)
2611 isr_txrdy(info->port_array[i]);
2612 if (status & BIT2 << shift)
2613 isr_rxint(info->port_array[i]);
2614 if (status & BIT3 << shift)
2615 isr_txint(info->port_array[i]);
2616
2617 if (dmastatus & BIT0 << shift)
2618 isr_rxdmaerror(info->port_array[i]);
2619 if (dmastatus & BIT1 << shift)
2620 isr_rxdmaok(info->port_array[i]);
2621 if (dmastatus & BIT2 << shift)
2622 isr_txdmaerror(info->port_array[i]);
2623 if (dmastatus & BIT3 << shift)
2624 isr_txdmaok(info->port_array[i]);
2625 }
2626
2627 if (timerstatus0 & (BIT5 | BIT4))
2628 isr_timer(info->port_array[0]);
2629 if (timerstatus0 & (BIT7 | BIT6))
2630 isr_timer(info->port_array[1]);
2631 if (timerstatus1 & (BIT5 | BIT4))
2632 isr_timer(info->port_array[2]);
2633 if (timerstatus1 & (BIT7 | BIT6))
2634 isr_timer(info->port_array[3]);
2635 }
2636
2637 for(i=0; i < info->port_count ; i++) {
2638 SLMP_INFO * port = info->port_array[i];
2639
2640 /* Request bottom half processing if there's something
2641 * for it to do and the bh is not already running.
2642 *
2643 * Note: startup adapter diags require interrupts.
2644 * do not request bottom half processing if the
2645 * device is not open in a normal mode.
2646 */
2647 if ( port && (port->port.count || port->netcount) &&
2648 port->pending_bh && !port->bh_running &&
2649 !port->bh_requested ) {
2650 if ( debug_level >= DEBUG_LEVEL_ISR )
2651 printk("%s(%d):%s queueing bh task.\n",
2652 __FILE__,__LINE__,port->device_name);
2653 schedule_work(&port->task);
2654 port->bh_requested = true;
2655 }
2656 }
2657
2658 spin_unlock(&info->lock);
2659
2660 if ( debug_level >= DEBUG_LEVEL_ISR )
2661 printk(KERN_DEBUG "%s(%d):synclinkmp_interrupt(%d)exit.\n",
2662 __FILE__, __LINE__, info->irq_level);
2663 return IRQ_HANDLED;
2664 }
2665
2666 /* Initialize and start device.
2667 */
2668 static int startup(SLMP_INFO * info)
2669 {
2670 if ( debug_level >= DEBUG_LEVEL_INFO )
2671 printk("%s(%d):%s tx_releaseup()\n",__FILE__,__LINE__,info->device_name);
2672
2673 if (info->port.flags & ASYNC_INITIALIZED)
2674 return 0;
2675
2676 if (!info->tx_buf) {
2677 info->tx_buf = kmalloc(info->max_frame_size, GFP_KERNEL);
2678 if (!info->tx_buf) {
2679 printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n",
2680 __FILE__,__LINE__,info->device_name);
2681 return -ENOMEM;
2682 }
2683 }
2684
2685 info->pending_bh = 0;
2686
2687 memset(&info->icount, 0, sizeof(info->icount));
2688
2689 /* program hardware for current parameters */
2690 reset_port(info);
2691
2692 change_params(info);
2693
2694 mod_timer(&info->status_timer, jiffies + msecs_to_jiffies(10));
2695
2696 if (info->port.tty)
2697 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
2698
2699 info->port.flags |= ASYNC_INITIALIZED;
2700
2701 return 0;
2702 }
2703
2704 /* Called by close() and hangup() to shutdown hardware
2705 */
2706 static void shutdown(SLMP_INFO * info)
2707 {
2708 unsigned long flags;
2709
2710 if (!(info->port.flags & ASYNC_INITIALIZED))
2711 return;
2712
2713 if (debug_level >= DEBUG_LEVEL_INFO)
2714 printk("%s(%d):%s synclinkmp_shutdown()\n",
2715 __FILE__,__LINE__, info->device_name );
2716
2717 /* clear status wait queue because status changes */
2718 /* can't happen after shutting down the hardware */
2719 wake_up_interruptible(&info->status_event_wait_q);
2720 wake_up_interruptible(&info->event_wait_q);
2721
2722 del_timer(&info->tx_timer);
2723 del_timer(&info->status_timer);
2724
2725 kfree(info->tx_buf);
2726 info->tx_buf = NULL;
2727
2728 spin_lock_irqsave(&info->lock,flags);
2729
2730 reset_port(info);
2731
2732 if (!info->port.tty || info->port.tty->termios->c_cflag & HUPCL) {
2733 info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS);
2734 set_signals(info);
2735 }
2736
2737 spin_unlock_irqrestore(&info->lock,flags);
2738
2739 if (info->port.tty)
2740 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
2741
2742 info->port.flags &= ~ASYNC_INITIALIZED;
2743 }
2744
2745 static void program_hw(SLMP_INFO *info)
2746 {
2747 unsigned long flags;
2748
2749 spin_lock_irqsave(&info->lock,flags);
2750
2751 rx_stop(info);
2752 tx_stop(info);
2753
2754 info->tx_count = info->tx_put = info->tx_get = 0;
2755
2756 if (info->params.mode == MGSL_MODE_HDLC || info->netcount)
2757 hdlc_mode(info);
2758 else
2759 async_mode(info);
2760
2761 set_signals(info);
2762
2763 info->dcd_chkcount = 0;
2764 info->cts_chkcount = 0;
2765 info->ri_chkcount = 0;
2766 info->dsr_chkcount = 0;
2767
2768 info->ie1_value |= (CDCD|CCTS);
2769 write_reg(info, IE1, info->ie1_value);
2770
2771 get_signals(info);
2772
2773 if (info->netcount || (info->port.tty && info->port.tty->termios->c_cflag & CREAD) )
2774 rx_start(info);
2775
2776 spin_unlock_irqrestore(&info->lock,flags);
2777 }
2778
2779 /* Reconfigure adapter based on new parameters
2780 */
2781 static void change_params(SLMP_INFO *info)
2782 {
2783 unsigned cflag;
2784 int bits_per_char;
2785
2786 if (!info->port.tty || !info->port.tty->termios)
2787 return;
2788
2789 if (debug_level >= DEBUG_LEVEL_INFO)
2790 printk("%s(%d):%s change_params()\n",
2791 __FILE__,__LINE__, info->device_name );
2792
2793 cflag = info->port.tty->termios->c_cflag;
2794
2795 /* if B0 rate (hangup) specified then negate DTR and RTS */
2796 /* otherwise assert DTR and RTS */
2797 if (cflag & CBAUD)
2798 info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
2799 else
2800 info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
2801
2802 /* byte size and parity */
2803
2804 switch (cflag & CSIZE) {
2805 case CS5: info->params.data_bits = 5; break;
2806 case CS6: info->params.data_bits = 6; break;
2807 case CS7: info->params.data_bits = 7; break;
2808 case CS8: info->params.data_bits = 8; break;
2809 /* Never happens, but GCC is too dumb to figure it out */
2810 default: info->params.data_bits = 7; break;
2811 }
2812
2813 if (cflag & CSTOPB)
2814 info->params.stop_bits = 2;
2815 else
2816 info->params.stop_bits = 1;
2817
2818 info->params.parity = ASYNC_PARITY_NONE;
2819 if (cflag & PARENB) {
2820 if (cflag & PARODD)
2821 info->params.parity = ASYNC_PARITY_ODD;
2822 else
2823 info->params.parity = ASYNC_PARITY_EVEN;
2824 #ifdef CMSPAR
2825 if (cflag & CMSPAR)
2826 info->params.parity = ASYNC_PARITY_SPACE;
2827 #endif
2828 }
2829
2830 /* calculate number of jiffies to transmit a full
2831 * FIFO (32 bytes) at specified data rate
2832 */
2833 bits_per_char = info->params.data_bits +
2834 info->params.stop_bits + 1;
2835
2836 /* if port data rate is set to 460800 or less then
2837 * allow tty settings to override, otherwise keep the
2838 * current data rate.
2839 */
2840 if (info->params.data_rate <= 460800) {
2841 info->params.data_rate = tty_get_baud_rate(info->port.tty);
2842 }
2843
2844 if ( info->params.data_rate ) {
2845 info->timeout = (32*HZ*bits_per_char) /
2846 info->params.data_rate;
2847 }
2848 info->timeout += HZ/50; /* Add .02 seconds of slop */
2849
2850 if (cflag & CRTSCTS)
2851 info->port.flags |= ASYNC_CTS_FLOW;
2852 else
2853 info->port.flags &= ~ASYNC_CTS_FLOW;
2854
2855 if (cflag & CLOCAL)
2856 info->port.flags &= ~ASYNC_CHECK_CD;
2857 else
2858 info->port.flags |= ASYNC_CHECK_CD;
2859
2860 /* process tty input control flags */
2861
2862 info->read_status_mask2 = OVRN;
2863 if (I_INPCK(info->port.tty))
2864 info->read_status_mask2 |= PE | FRME;
2865 if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))
2866 info->read_status_mask1 |= BRKD;
2867 if (I_IGNPAR(info->port.tty))
2868 info->ignore_status_mask2 |= PE | FRME;
2869 if (I_IGNBRK(info->port.tty)) {
2870 info->ignore_status_mask1 |= BRKD;
2871 /* If ignoring parity and break indicators, ignore
2872 * overruns too. (For real raw support).
2873 */
2874 if (I_IGNPAR(info->port.tty))
2875 info->ignore_status_mask2 |= OVRN;
2876 }
2877
2878 program_hw(info);
2879 }
2880
2881 static int get_stats(SLMP_INFO * info, struct mgsl_icount __user *user_icount)
2882 {
2883 int err;
2884
2885 if (debug_level >= DEBUG_LEVEL_INFO)
2886 printk("%s(%d):%s get_params()\n",
2887 __FILE__,__LINE__, info->device_name);
2888
2889 if (!user_icount) {
2890 memset(&info->icount, 0, sizeof(info->icount));
2891 } else {
2892 COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount));
2893 if (err)
2894 return -EFAULT;
2895 }
2896
2897 return 0;
2898 }
2899
2900 static int get_params(SLMP_INFO * info, MGSL_PARAMS __user *user_params)
2901 {
2902 int err;
2903 if (debug_level >= DEBUG_LEVEL_INFO)
2904 printk("%s(%d):%s get_params()\n",
2905 __FILE__,__LINE__, info->device_name);
2906
2907 COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS));
2908 if (err) {
2909 if ( debug_level >= DEBUG_LEVEL_INFO )
2910 printk( "%s(%d):%s get_params() user buffer copy failed\n",
2911 __FILE__,__LINE__,info->device_name);
2912 return -EFAULT;
2913 }
2914
2915 return 0;
2916 }
2917
2918 static int set_params(SLMP_INFO * info, MGSL_PARAMS __user *new_params)
2919 {
2920 unsigned long flags;
2921 MGSL_PARAMS tmp_params;
2922 int err;
2923
2924 if (debug_level >= DEBUG_LEVEL_INFO)
2925 printk("%s(%d):%s set_params\n",
2926 __FILE__,__LINE__,info->device_name );
2927 COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS));
2928 if (err) {
2929 if ( debug_level >= DEBUG_LEVEL_INFO )
2930 printk( "%s(%d):%s set_params() user buffer copy failed\n",
2931 __FILE__,__LINE__,info->device_name);
2932 return -EFAULT;
2933 }
2934
2935 spin_lock_irqsave(&info->lock,flags);
2936 memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS));
2937 spin_unlock_irqrestore(&info->lock,flags);
2938
2939 change_params(info);
2940
2941 return 0;
2942 }
2943
2944 static int get_txidle(SLMP_INFO * info, int __user *idle_mode)
2945 {
2946 int err;
2947
2948 if (debug_level >= DEBUG_LEVEL_INFO)
2949 printk("%s(%d):%s get_txidle()=%d\n",
2950 __FILE__,__LINE__, info->device_name, info->idle_mode);
2951
2952 COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int));
2953 if (err) {
2954 if ( debug_level >= DEBUG_LEVEL_INFO )
2955 printk( "%s(%d):%s get_txidle() user buffer copy failed\n",
2956 __FILE__,__LINE__,info->device_name);
2957 return -EFAULT;
2958 }
2959
2960 return 0;
2961 }
2962
2963 static int set_txidle(SLMP_INFO * info, int idle_mode)
2964 {
2965 unsigned long flags;
2966
2967 if (debug_level >= DEBUG_LEVEL_INFO)
2968 printk("%s(%d):%s set_txidle(%d)\n",
2969 __FILE__,__LINE__,info->device_name, idle_mode );
2970
2971 spin_lock_irqsave(&info->lock,flags);
2972 info->idle_mode = idle_mode;
2973 tx_set_idle( info );
2974 spin_unlock_irqrestore(&info->lock,flags);
2975 return 0;
2976 }
2977
2978 static int tx_enable(SLMP_INFO * info, int enable)
2979 {
2980 unsigned long flags;
2981
2982 if (debug_level >= DEBUG_LEVEL_INFO)
2983 printk("%s(%d):%s tx_enable(%d)\n",
2984 __FILE__,__LINE__,info->device_name, enable);
2985
2986 spin_lock_irqsave(&info->lock,flags);
2987 if ( enable ) {
2988 if ( !info->tx_enabled ) {
2989 tx_start(info);
2990 }
2991 } else {
2992 if ( info->tx_enabled )
2993 tx_stop(info);
2994 }
2995 spin_unlock_irqrestore(&info->lock,flags);
2996 return 0;
2997 }
2998
2999 /* abort send HDLC frame
3000 */
3001 static int tx_abort(SLMP_INFO * info)
3002 {
3003 unsigned long flags;
3004
3005 if (debug_level >= DEBUG_LEVEL_INFO)
3006 printk("%s(%d):%s tx_abort()\n",
3007 __FILE__,__LINE__,info->device_name);
3008
3009 spin_lock_irqsave(&info->lock,flags);
3010 if ( info->tx_active && info->params.mode == MGSL_MODE_HDLC ) {
3011 info->ie1_value &= ~UDRN;
3012 info->ie1_value |= IDLE;
3013 write_reg(info, IE1, info->ie1_value); /* disable tx status interrupts */
3014 write_reg(info, SR1, (unsigned char)(IDLE + UDRN)); /* clear pending */
3015
3016 write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */
3017 write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
3018
3019 write_reg(info, CMD, TXABORT);
3020 }
3021 spin_unlock_irqrestore(&info->lock,flags);
3022 return 0;
3023 }
3024
3025 static int rx_enable(SLMP_INFO * info, int enable)
3026 {
3027 unsigned long flags;
3028
3029 if (debug_level >= DEBUG_LEVEL_INFO)
3030 printk("%s(%d):%s rx_enable(%d)\n",
3031 __FILE__,__LINE__,info->device_name,enable);
3032
3033 spin_lock_irqsave(&info->lock,flags);
3034 if ( enable ) {
3035 if ( !info->rx_enabled )
3036 rx_start(info);
3037 } else {
3038 if ( info->rx_enabled )
3039 rx_stop(info);
3040 }
3041 spin_unlock_irqrestore(&info->lock,flags);
3042 return 0;
3043 }
3044
3045 /* wait for specified event to occur
3046 */
3047 static int wait_mgsl_event(SLMP_INFO * info, int __user *mask_ptr)
3048 {
3049 unsigned long flags;
3050 int s;
3051 int rc=0;
3052 struct mgsl_icount cprev, cnow;
3053 int events;
3054 int mask;
3055 struct _input_signal_events oldsigs, newsigs;
3056 DECLARE_WAITQUEUE(wait, current);
3057
3058 COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int));
3059 if (rc) {
3060 return -EFAULT;
3061 }
3062
3063 if (debug_level >= DEBUG_LEVEL_INFO)
3064 printk("%s(%d):%s wait_mgsl_event(%d)\n",
3065 __FILE__,__LINE__,info->device_name,mask);
3066
3067 spin_lock_irqsave(&info->lock,flags);
3068
3069 /* return immediately if state matches requested events */
3070 get_signals(info);
3071 s = info->serial_signals;
3072
3073 events = mask &
3074 ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) +
3075 ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) +
3076 ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) +
3077 ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) );
3078 if (events) {
3079 spin_unlock_irqrestore(&info->lock,flags);
3080 goto exit;
3081 }
3082
3083 /* save current irq counts */
3084 cprev = info->icount;
3085 oldsigs = info->input_signal_events;
3086
3087 /* enable hunt and idle irqs if needed */
3088 if (mask & (MgslEvent_ExitHuntMode+MgslEvent_IdleReceived)) {
3089 unsigned char oldval = info->ie1_value;
3090 unsigned char newval = oldval +
3091 (mask & MgslEvent_ExitHuntMode ? FLGD:0) +
3092 (mask & MgslEvent_IdleReceived ? IDLD:0);
3093 if ( oldval != newval ) {
3094 info->ie1_value = newval;
3095 write_reg(info, IE1, info->ie1_value);
3096 }
3097 }
3098
3099 set_current_state(TASK_INTERRUPTIBLE);
3100 add_wait_queue(&info->event_wait_q, &wait);
3101
3102 spin_unlock_irqrestore(&info->lock,flags);
3103
3104 for(;;) {
3105 schedule();
3106 if (signal_pending(current)) {
3107 rc = -ERESTARTSYS;
3108 break;
3109 }
3110
3111 /* get current irq counts */
3112 spin_lock_irqsave(&info->lock,flags);
3113 cnow = info->icount;
3114 newsigs = info->input_signal_events;
3115 set_current_state(TASK_INTERRUPTIBLE);
3116 spin_unlock_irqrestore(&info->lock,flags);
3117
3118 /* if no change, wait aborted for some reason */
3119 if (newsigs.dsr_up == oldsigs.dsr_up &&
3120 newsigs.dsr_down == oldsigs.dsr_down &&
3121 newsigs.dcd_up == oldsigs.dcd_up &&
3122 newsigs.dcd_down == oldsigs.dcd_down &&
3123 newsigs.cts_up == oldsigs.cts_up &&
3124 newsigs.cts_down == oldsigs.cts_down &&
3125 newsigs.ri_up == oldsigs.ri_up &&
3126 newsigs.ri_down == oldsigs.ri_down &&
3127 cnow.exithunt == cprev.exithunt &&
3128 cnow.rxidle == cprev.rxidle) {
3129 rc = -EIO;
3130 break;
3131 }
3132
3133 events = mask &
3134 ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) +
3135 (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) +
3136 (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) +
3137 (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) +
3138 (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) +
3139 (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) +
3140 (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) +
3141 (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) +
3142 (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) +
3143 (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) );
3144 if (events)
3145 break;
3146
3147 cprev = cnow;
3148 oldsigs = newsigs;
3149 }
3150
3151 remove_wait_queue(&info->event_wait_q, &wait);
3152 set_current_state(TASK_RUNNING);
3153
3154
3155 if (mask & (MgslEvent_ExitHuntMode + MgslEvent_IdleReceived)) {
3156 spin_lock_irqsave(&info->lock,flags);
3157 if (!waitqueue_active(&info->event_wait_q)) {
3158 /* disable enable exit hunt mode/idle rcvd IRQs */
3159 info->ie1_value &= ~(FLGD|IDLD);
3160 write_reg(info, IE1, info->ie1_value);
3161 }
3162 spin_unlock_irqrestore(&info->lock,flags);
3163 }
3164 exit:
3165 if ( rc == 0 )
3166 PUT_USER(rc, events, mask_ptr);
3167
3168 return rc;
3169 }
3170
3171 static int modem_input_wait(SLMP_INFO *info,int arg)
3172 {
3173 unsigned long flags;
3174 int rc;
3175 struct mgsl_icount cprev, cnow;
3176 DECLARE_WAITQUEUE(wait, current);
3177
3178 /* save current irq counts */
3179 spin_lock_irqsave(&info->lock,flags);
3180 cprev = info->icount;
3181 add_wait_queue(&info->status_event_wait_q, &wait);
3182 set_current_state(TASK_INTERRUPTIBLE);
3183 spin_unlock_irqrestore(&info->lock,flags);
3184
3185 for(;;) {
3186 schedule();
3187 if (signal_pending(current)) {
3188 rc = -ERESTARTSYS;
3189 break;
3190 }
3191
3192 /* get new irq counts */
3193 spin_lock_irqsave(&info->lock,flags);
3194 cnow = info->icount;
3195 set_current_state(TASK_INTERRUPTIBLE);
3196 spin_unlock_irqrestore(&info->lock,flags);
3197
3198 /* if no change, wait aborted for some reason */
3199 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
3200 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
3201 rc = -EIO;
3202 break;
3203 }
3204
3205 /* check for change in caller specified modem input */
3206 if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) ||
3207 (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) ||
3208 (arg & TIOCM_CD && cnow.dcd != cprev.dcd) ||
3209 (arg & TIOCM_CTS && cnow.cts != cprev.cts)) {
3210 rc = 0;
3211 break;
3212 }
3213
3214 cprev = cnow;
3215 }
3216 remove_wait_queue(&info->status_event_wait_q, &wait);
3217 set_current_state(TASK_RUNNING);
3218 return rc;
3219 }
3220
3221 /* return the state of the serial control and status signals
3222 */
3223 static int tiocmget(struct tty_struct *tty, struct file *file)
3224 {
3225 SLMP_INFO *info = tty->driver_data;
3226 unsigned int result;
3227 unsigned long flags;
3228
3229 spin_lock_irqsave(&info->lock,flags);
3230 get_signals(info);
3231 spin_unlock_irqrestore(&info->lock,flags);
3232
3233 result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS:0) +
3234 ((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR:0) +
3235 ((info->serial_signals & SerialSignal_DCD) ? TIOCM_CAR:0) +
3236 ((info->serial_signals & SerialSignal_RI) ? TIOCM_RNG:0) +
3237 ((info->serial_signals & SerialSignal_DSR) ? TIOCM_DSR:0) +
3238 ((info->serial_signals & SerialSignal_CTS) ? TIOCM_CTS:0);
3239
3240 if (debug_level >= DEBUG_LEVEL_INFO)
3241 printk("%s(%d):%s tiocmget() value=%08X\n",
3242 __FILE__,__LINE__, info->device_name, result );
3243 return result;
3244 }
3245
3246 /* set modem control signals (DTR/RTS)
3247 */
3248 static int tiocmset(struct tty_struct *tty, struct file *file,
3249 unsigned int set, unsigned int clear)
3250 {
3251 SLMP_INFO *info = tty->driver_data;
3252 unsigned long flags;
3253
3254 if (debug_level >= DEBUG_LEVEL_INFO)
3255 printk("%s(%d):%s tiocmset(%x,%x)\n",
3256 __FILE__,__LINE__,info->device_name, set, clear);
3257
3258 if (set & TIOCM_RTS)
3259 info->serial_signals |= SerialSignal_RTS;
3260 if (set & TIOCM_DTR)
3261 info->serial_signals |= SerialSignal_DTR;
3262 if (clear & TIOCM_RTS)
3263 info->serial_signals &= ~SerialSignal_RTS;
3264 if (clear & TIOCM_DTR)
3265 info->serial_signals &= ~SerialSignal_DTR;
3266
3267 spin_lock_irqsave(&info->lock,flags);
3268 set_signals(info);
3269 spin_unlock_irqrestore(&info->lock,flags);
3270
3271 return 0;
3272 }
3273
3274 static int carrier_raised(struct tty_port *port)
3275 {
3276 SLMP_INFO *info = container_of(port, SLMP_INFO, port);
3277 unsigned long flags;
3278
3279 spin_lock_irqsave(&info->lock,flags);
3280 get_signals(info);
3281 spin_unlock_irqrestore(&info->lock,flags);
3282
3283 return (info->serial_signals & SerialSignal_DCD) ? 1 : 0;
3284 }
3285
3286 static void raise_dtr_rts(struct tty_port *port)
3287 {
3288 SLMP_INFO *info = container_of(port, SLMP_INFO, port);
3289 unsigned long flags;
3290
3291 spin_lock_irqsave(&info->lock,flags);
3292 info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
3293 set_signals(info);
3294 spin_unlock_irqrestore(&info->lock,flags);
3295 }
3296
3297 /* Block the current process until the specified port is ready to open.
3298 */
3299 static int block_til_ready(struct tty_struct *tty, struct file *filp,
3300 SLMP_INFO *info)
3301 {
3302 DECLARE_WAITQUEUE(wait, current);
3303 int retval;
3304 bool do_clocal = false;
3305 bool extra_count = false;
3306 unsigned long flags;
3307 int cd;
3308 struct tty_port *port = &info->port;
3309
3310 if (debug_level >= DEBUG_LEVEL_INFO)
3311 printk("%s(%d):%s block_til_ready()\n",
3312 __FILE__,__LINE__, tty->driver->name );
3313
3314 if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
3315 /* nonblock mode is set or port is not enabled */
3316 /* just verify that callout device is not active */
3317 port->flags |= ASYNC_NORMAL_ACTIVE;
3318 return 0;
3319 }
3320
3321 if (tty->termios->c_cflag & CLOCAL)
3322 do_clocal = true;
3323
3324 /* Wait for carrier detect and the line to become
3325 * free (i.e., not in use by the callout). While we are in
3326 * this loop, port->count is dropped by one, so that
3327 * close() knows when to free things. We restore it upon
3328 * exit, either normal or abnormal.
3329 */
3330
3331 retval = 0;
3332 add_wait_queue(&port->open_wait, &wait);
3333
3334 if (debug_level >= DEBUG_LEVEL_INFO)
3335 printk("%s(%d):%s block_til_ready() before block, count=%d\n",
3336 __FILE__,__LINE__, tty->driver->name, port->count );
3337
3338 spin_lock_irqsave(&info->lock, flags);
3339 if (!tty_hung_up_p(filp)) {
3340 extra_count = true;
3341 port->count--;
3342 }
3343 spin_unlock_irqrestore(&info->lock, flags);
3344 port->blocked_open++;
3345
3346 while (1) {
3347 if (tty->termios->c_cflag & CBAUD)
3348 tty_port_raise_dtr_rts(port);
3349
3350 set_current_state(TASK_INTERRUPTIBLE);
3351
3352 if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)){
3353 retval = (port->flags & ASYNC_HUP_NOTIFY) ?
3354 -EAGAIN : -ERESTARTSYS;
3355 break;
3356 }
3357
3358 cd = tty_port_carrier_raised(port);
3359
3360 if (!(port->flags & ASYNC_CLOSING) && (do_clocal || cd))
3361 break;
3362
3363 if (signal_pending(current)) {
3364 retval = -ERESTARTSYS;
3365 break;
3366 }
3367
3368 if (debug_level >= DEBUG_LEVEL_INFO)
3369 printk("%s(%d):%s block_til_ready() count=%d\n",
3370 __FILE__,__LINE__, tty->driver->name, port->count );
3371
3372 schedule();
3373 }
3374
3375 set_current_state(TASK_RUNNING);
3376 remove_wait_queue(&port->open_wait, &wait);
3377
3378 if (extra_count)
3379 port->count++;
3380 port->blocked_open--;
3381
3382 if (debug_level >= DEBUG_LEVEL_INFO)
3383 printk("%s(%d):%s block_til_ready() after, count=%d\n",
3384 __FILE__,__LINE__, tty->driver->name, port->count );
3385
3386 if (!retval)
3387 port->flags |= ASYNC_NORMAL_ACTIVE;
3388
3389 return retval;
3390 }
3391
3392 static int alloc_dma_bufs(SLMP_INFO *info)
3393 {
3394 unsigned short BuffersPerFrame;
3395 unsigned short BufferCount;
3396
3397 // Force allocation to start at 64K boundary for each port.
3398 // This is necessary because *all* buffer descriptors for a port
3399 // *must* be in the same 64K block. All descriptors on a port
3400 // share a common 'base' address (upper 8 bits of 24 bits) programmed
3401 // into the CBP register.
3402 info->port_array[0]->last_mem_alloc = (SCA_MEM_SIZE/4) * info->port_num;
3403
3404 /* Calculate the number of DMA buffers necessary to hold the */
3405 /* largest allowable frame size. Note: If the max frame size is */
3406 /* not an even multiple of the DMA buffer size then we need to */
3407 /* round the buffer count per frame up one. */
3408
3409 BuffersPerFrame = (unsigned short)(info->max_frame_size/SCABUFSIZE);
3410 if ( info->max_frame_size % SCABUFSIZE )
3411 BuffersPerFrame++;
3412
3413 /* calculate total number of data buffers (SCABUFSIZE) possible
3414 * in one ports memory (SCA_MEM_SIZE/4) after allocating memory
3415 * for the descriptor list (BUFFERLISTSIZE).
3416 */
3417 BufferCount = (SCA_MEM_SIZE/4 - BUFFERLISTSIZE)/SCABUFSIZE;
3418
3419 /* limit number of buffers to maximum amount of descriptors */
3420 if (BufferCount > BUFFERLISTSIZE/sizeof(SCADESC))
3421 BufferCount = BUFFERLISTSIZE/sizeof(SCADESC);
3422
3423 /* use enough buffers to transmit one max size frame */
3424 info->tx_buf_count = BuffersPerFrame + 1;
3425
3426 /* never use more than half the available buffers for transmit */
3427 if (info->tx_buf_count > (BufferCount/2))
3428 info->tx_buf_count = BufferCount/2;
3429
3430 if (info->tx_buf_count > SCAMAXDESC)
3431 info->tx_buf_count = SCAMAXDESC;
3432
3433 /* use remaining buffers for receive */
3434 info->rx_buf_count = BufferCount - info->tx_buf_count;
3435
3436 if (info->rx_buf_count > SCAMAXDESC)
3437 info->rx_buf_count = SCAMAXDESC;
3438
3439 if ( debug_level >= DEBUG_LEVEL_INFO )
3440 printk("%s(%d):%s Allocating %d TX and %d RX DMA buffers.\n",
3441 __FILE__,__LINE__, info->device_name,
3442 info->tx_buf_count,info->rx_buf_count);
3443
3444 if ( alloc_buf_list( info ) < 0 ||
3445 alloc_frame_bufs(info,
3446 info->rx_buf_list,
3447 info->rx_buf_list_ex,
3448 info->rx_buf_count) < 0 ||
3449 alloc_frame_bufs(info,
3450 info->tx_buf_list,
3451 info->tx_buf_list_ex,
3452 info->tx_buf_count) < 0 ||
3453 alloc_tmp_rx_buf(info) < 0 ) {
3454 printk("%s(%d):%s Can't allocate DMA buffer memory\n",
3455 __FILE__,__LINE__, info->device_name);
3456 return -ENOMEM;
3457 }
3458
3459 rx_reset_buffers( info );
3460
3461 return 0;
3462 }
3463
3464 /* Allocate DMA buffers for the transmit and receive descriptor lists.
3465 */
3466 static int alloc_buf_list(SLMP_INFO *info)
3467 {
3468 unsigned int i;
3469
3470 /* build list in adapter shared memory */
3471 info->buffer_list = info->memory_base + info->port_array[0]->last_mem_alloc;
3472 info->buffer_list_phys = info->port_array[0]->last_mem_alloc;
3473 info->port_array[0]->last_mem_alloc += BUFFERLISTSIZE;
3474
3475 memset(info->buffer_list, 0, BUFFERLISTSIZE);
3476
3477 /* Save virtual address pointers to the receive and */
3478 /* transmit buffer lists. (Receive 1st). These pointers will */
3479 /* be used by the processor to access the lists. */
3480 info->rx_buf_list = (SCADESC *)info->buffer_list;
3481
3482 info->tx_buf_list = (SCADESC *)info->buffer_list;
3483 info->tx_buf_list += info->rx_buf_count;
3484
3485 /* Build links for circular buffer entry lists (tx and rx)
3486 *
3487 * Note: links are physical addresses read by the SCA device
3488 * to determine the next buffer entry to use.
3489 */
3490
3491 for ( i = 0; i < info->rx_buf_count; i++ ) {
3492 /* calculate and store physical address of this buffer entry */
3493 info->rx_buf_list_ex[i].phys_entry =
3494 info->buffer_list_phys + (i * sizeof(SCABUFSIZE));
3495
3496 /* calculate and store physical address of */
3497 /* next entry in cirular list of entries */
3498 info->rx_buf_list[i].next = info->buffer_list_phys;
3499 if ( i < info->rx_buf_count - 1 )
3500 info->rx_buf_list[i].next += (i + 1) * sizeof(SCADESC);
3501
3502 info->rx_buf_list[i].length = SCABUFSIZE;
3503 }
3504
3505 for ( i = 0; i < info->tx_buf_count; i++ ) {
3506 /* calculate and store physical address of this buffer entry */
3507 info->tx_buf_list_ex[i].phys_entry = info->buffer_list_phys +
3508 ((info->rx_buf_count + i) * sizeof(SCADESC));
3509
3510 /* calculate and store physical address of */
3511 /* next entry in cirular list of entries */
3512
3513 info->tx_buf_list[i].next = info->buffer_list_phys +
3514 info->rx_buf_count * sizeof(SCADESC);
3515
3516 if ( i < info->tx_buf_count - 1 )
3517 info->tx_buf_list[i].next += (i + 1) * sizeof(SCADESC);
3518 }
3519
3520 return 0;
3521 }
3522
3523 /* Allocate the frame DMA buffers used by the specified buffer list.
3524 */
3525 static int alloc_frame_bufs(SLMP_INFO *info, SCADESC *buf_list,SCADESC_EX *buf_list_ex,int count)
3526 {
3527 int i;
3528 unsigned long phys_addr;
3529
3530 for ( i = 0; i < count; i++ ) {
3531 buf_list_ex[i].virt_addr = info->memory_base + info->port_array[0]->last_mem_alloc;
3532 phys_addr = info->port_array[0]->last_mem_alloc;
3533 info->port_array[0]->last_mem_alloc += SCABUFSIZE;
3534
3535 buf_list[i].buf_ptr = (unsigned short)phys_addr;
3536 buf_list[i].buf_base = (unsigned char)(phys_addr >> 16);
3537 }
3538
3539 return 0;
3540 }
3541
3542 static void free_dma_bufs(SLMP_INFO *info)
3543 {
3544 info->buffer_list = NULL;
3545 info->rx_buf_list = NULL;
3546 info->tx_buf_list = NULL;
3547 }
3548
3549 /* allocate buffer large enough to hold max_frame_size.
3550 * This buffer is used to pass an assembled frame to the line discipline.
3551 */
3552 static int alloc_tmp_rx_buf(SLMP_INFO *info)
3553 {
3554 info->tmp_rx_buf = kmalloc(info->max_frame_size, GFP_KERNEL);
3555 if (info->tmp_rx_buf == NULL)
3556 return -ENOMEM;
3557 return 0;
3558 }
3559
3560 static void free_tmp_rx_buf(SLMP_INFO *info)
3561 {
3562 kfree(info->tmp_rx_buf);
3563 info->tmp_rx_buf = NULL;
3564 }
3565
3566 static int claim_resources(SLMP_INFO *info)
3567 {
3568 if (request_mem_region(info->phys_memory_base,SCA_MEM_SIZE,"synclinkmp") == NULL) {
3569 printk( "%s(%d):%s mem addr conflict, Addr=%08X\n",
3570 __FILE__,__LINE__,info->device_name, info->phys_memory_base);
3571 info->init_error = DiagStatus_AddressConflict;
3572 goto errout;
3573 }
3574 else
3575 info->shared_mem_requested = true;
3576
3577 if (request_mem_region(info->phys_lcr_base + info->lcr_offset,128,"synclinkmp") == NULL) {
3578 printk( "%s(%d):%s lcr mem addr conflict, Addr=%08X\n",
3579 __FILE__,__LINE__,info->device_name, info->phys_lcr_base);
3580 info->init_error = DiagStatus_AddressConflict;
3581 goto errout;
3582 }
3583 else
3584 info->lcr_mem_requested = true;
3585
3586 if (request_mem_region(info->phys_sca_base + info->sca_offset,SCA_BASE_SIZE,"synclinkmp") == NULL) {
3587 printk( "%s(%d):%s sca mem addr conflict, Addr=%08X\n",
3588 __FILE__,__LINE__,info->device_name, info->phys_sca_base);
3589 info->init_error = DiagStatus_AddressConflict;
3590 goto errout;
3591 }
3592 else
3593 info->sca_base_requested = true;
3594
3595 if (request_mem_region(info->phys_statctrl_base + info->statctrl_offset,SCA_REG_SIZE,"synclinkmp") == NULL) {
3596 printk( "%s(%d):%s stat/ctrl mem addr conflict, Addr=%08X\n",
3597 __FILE__,__LINE__,info->device_name, info->phys_statctrl_base);
3598 info->init_error = DiagStatus_AddressConflict;
3599 goto errout;
3600 }
3601 else
3602 info->sca_statctrl_requested = true;
3603
3604 info->memory_base = ioremap_nocache(info->phys_memory_base,
3605 SCA_MEM_SIZE);
3606 if (!info->memory_base) {
3607 printk( "%s(%d):%s Cant map shared memory, MemAddr=%08X\n",
3608 __FILE__,__LINE__,info->device_name, info->phys_memory_base );
3609 info->init_error = DiagStatus_CantAssignPciResources;
3610 goto errout;
3611 }
3612
3613 info->lcr_base = ioremap_nocache(info->phys_lcr_base, PAGE_SIZE);
3614 if (!info->lcr_base) {
3615 printk( "%s(%d):%s Cant map LCR memory, MemAddr=%08X\n",
3616 __FILE__,__LINE__,info->device_name, info->phys_lcr_base );
3617 info->init_error = DiagStatus_CantAssignPciResources;
3618 goto errout;
3619 }
3620 info->lcr_base += info->lcr_offset;
3621
3622 info->sca_base = ioremap_nocache(info->phys_sca_base, PAGE_SIZE);
3623 if (!info->sca_base) {
3624 printk( "%s(%d):%s Cant map SCA memory, MemAddr=%08X\n",
3625 __FILE__,__LINE__,info->device_name, info->phys_sca_base );
3626 info->init_error = DiagStatus_CantAssignPciResources;
3627 goto errout;
3628 }
3629 info->sca_base += info->sca_offset;
3630
3631 info->statctrl_base = ioremap_nocache(info->phys_statctrl_base,
3632 PAGE_SIZE);
3633 if (!info->statctrl_base) {
3634 printk( "%s(%d):%s Cant map SCA Status/Control memory, MemAddr=%08X\n",
3635 __FILE__,__LINE__,info->device_name, info->phys_statctrl_base );
3636 info->init_error = DiagStatus_CantAssignPciResources;
3637 goto errout;
3638 }
3639 info->statctrl_base += info->statctrl_offset;
3640
3641 if ( !memory_test(info) ) {
3642 printk( "%s(%d):Shared Memory Test failed for device %s MemAddr=%08X\n",
3643 __FILE__,__LINE__,info->device_name, info->phys_memory_base );
3644 info->init_error = DiagStatus_MemoryError;
3645 goto errout;
3646 }
3647
3648 return 0;
3649
3650 errout:
3651 release_resources( info );
3652 return -ENODEV;
3653 }
3654
3655 static void release_resources(SLMP_INFO *info)
3656 {
3657 if ( debug_level >= DEBUG_LEVEL_INFO )
3658 printk( "%s(%d):%s release_resources() entry\n",
3659 __FILE__,__LINE__,info->device_name );
3660
3661 if ( info->irq_requested ) {
3662 free_irq(info->irq_level, info);
3663 info->irq_requested = false;
3664 }
3665
3666 if ( info->shared_mem_requested ) {
3667 release_mem_region(info->phys_memory_base,SCA_MEM_SIZE);
3668 info->shared_mem_requested = false;
3669 }
3670 if ( info->lcr_mem_requested ) {
3671 release_mem_region(info->phys_lcr_base + info->lcr_offset,128);
3672 info->lcr_mem_requested = false;
3673 }
3674 if ( info->sca_base_requested ) {
3675 release_mem_region(info->phys_sca_base + info->sca_offset,SCA_BASE_SIZE);
3676 info->sca_base_requested = false;
3677 }
3678 if ( info->sca_statctrl_requested ) {
3679 release_mem_region(info->phys_statctrl_base + info->statctrl_offset,SCA_REG_SIZE);
3680 info->sca_statctrl_requested = false;
3681 }
3682
3683 if (info->memory_base){
3684 iounmap(info->memory_base);
3685 info->memory_base = NULL;
3686 }
3687
3688 if (info->sca_base) {
3689 iounmap(info->sca_base - info->sca_offset);
3690 info->sca_base=NULL;
3691 }
3692
3693 if (info->statctrl_base) {
3694 iounmap(info->statctrl_base - info->statctrl_offset);
3695 info->statctrl_base=NULL;
3696 }
3697
3698 if (info->lcr_base){
3699 iounmap(info->lcr_base - info->lcr_offset);
3700 info->lcr_base = NULL;
3701 }
3702
3703 if ( debug_level >= DEBUG_LEVEL_INFO )
3704 printk( "%s(%d):%s release_resources() exit\n",
3705 __FILE__,__LINE__,info->device_name );
3706 }
3707
3708 /* Add the specified device instance data structure to the
3709 * global linked list of devices and increment the device count.
3710 */
3711 static void add_device(SLMP_INFO *info)
3712 {
3713 info->next_device = NULL;
3714 info->line = synclinkmp_device_count;
3715 sprintf(info->device_name,"ttySLM%dp%d",info->adapter_num,info->port_num);
3716
3717 if (info->line < MAX_DEVICES) {
3718 if (maxframe[info->line])
3719 info->max_frame_size = maxframe[info->line];
3720 }
3721
3722 synclinkmp_device_count++;
3723
3724 if ( !synclinkmp_device_list )
3725 synclinkmp_device_list = info;
3726 else {
3727 SLMP_INFO *current_dev = synclinkmp_device_list;
3728 while( current_dev->next_device )
3729 current_dev = current_dev->next_device;
3730 current_dev->next_device = info;
3731 }
3732
3733 if ( info->max_frame_size < 4096 )
3734 info->max_frame_size = 4096;
3735 else if ( info->max_frame_size > 65535 )
3736 info->max_frame_size = 65535;
3737
3738 printk( "SyncLink MultiPort %s: "
3739 "Mem=(%08x %08X %08x %08X) IRQ=%d MaxFrameSize=%u\n",
3740 info->device_name,
3741 info->phys_sca_base,
3742 info->phys_memory_base,
3743 info->phys_statctrl_base,
3744 info->phys_lcr_base,
3745 info->irq_level,
3746 info->max_frame_size );
3747
3748 #if SYNCLINK_GENERIC_HDLC
3749 hdlcdev_init(info);
3750 #endif
3751 }
3752
3753 static const struct tty_port_operations port_ops = {
3754 .carrier_raised = carrier_raised,
3755 .raise_dtr_rts = raise_dtr_rts,
3756 };
3757
3758 /* Allocate and initialize a device instance structure
3759 *
3760 * Return Value: pointer to SLMP_INFO if success, otherwise NULL
3761 */
3762 static SLMP_INFO *alloc_dev(int adapter_num, int port_num, struct pci_dev *pdev)
3763 {
3764 SLMP_INFO *info;
3765
3766 info = kzalloc(sizeof(SLMP_INFO),
3767 GFP_KERNEL);
3768
3769 if (!info) {
3770 printk("%s(%d) Error can't allocate device instance data for adapter %d, port %d\n",
3771 __FILE__,__LINE__, adapter_num, port_num);
3772 } else {
3773 tty_port_init(&info->port);
3774 info->port.ops = &port_ops;
3775 info->magic = MGSL_MAGIC;
3776 INIT_WORK(&info->task, bh_handler);
3777 info->max_frame_size = 4096;
3778 info->port.close_delay = 5*HZ/10;
3779 info->port.closing_wait = 30*HZ;
3780 init_waitqueue_head(&info->status_event_wait_q);
3781 init_waitqueue_head(&info->event_wait_q);
3782 spin_lock_init(&info->netlock);
3783 memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS));
3784 info->idle_mode = HDLC_TXIDLE_FLAGS;
3785 info->adapter_num = adapter_num;
3786 info->port_num = port_num;
3787
3788 /* Copy configuration info to device instance data */
3789 info->irq_level = pdev->irq;
3790 info->phys_lcr_base = pci_resource_start(pdev,0);
3791 info->phys_sca_base = pci_resource_start(pdev,2);
3792 info->phys_memory_base = pci_resource_start(pdev,3);
3793 info->phys_statctrl_base = pci_resource_start(pdev,4);
3794
3795 /* Because veremap only works on page boundaries we must map
3796 * a larger area than is actually implemented for the LCR
3797 * memory range. We map a full page starting at the page boundary.
3798 */
3799 info->lcr_offset = info->phys_lcr_base & (PAGE_SIZE-1);
3800 info->phys_lcr_base &= ~(PAGE_SIZE-1);
3801
3802 info->sca_offset = info->phys_sca_base & (PAGE_SIZE-1);
3803 info->phys_sca_base &= ~(PAGE_SIZE-1);
3804
3805 info->statctrl_offset = info->phys_statctrl_base & (PAGE_SIZE-1);
3806 info->phys_statctrl_base &= ~(PAGE_SIZE-1);
3807
3808 info->bus_type = MGSL_BUS_TYPE_PCI;
3809 info->irq_flags = IRQF_SHARED;
3810
3811 setup_timer(&info->tx_timer, tx_timeout, (unsigned long)info);
3812 setup_timer(&info->status_timer, status_timeout,
3813 (unsigned long)info);
3814
3815 /* Store the PCI9050 misc control register value because a flaw
3816 * in the PCI9050 prevents LCR registers from being read if
3817 * BIOS assigns an LCR base address with bit 7 set.
3818 *
3819 * Only the misc control register is accessed for which only
3820 * write access is needed, so set an initial value and change
3821 * bits to the device instance data as we write the value
3822 * to the actual misc control register.
3823 */
3824 info->misc_ctrl_value = 0x087e4546;
3825
3826 /* initial port state is unknown - if startup errors
3827 * occur, init_error will be set to indicate the
3828 * problem. Once the port is fully initialized,
3829 * this value will be set to 0 to indicate the
3830 * port is available.
3831 */
3832 info->init_error = -1;
3833 }
3834
3835 return info;
3836 }
3837
3838 static void device_init(int adapter_num, struct pci_dev *pdev)
3839 {
3840 SLMP_INFO *port_array[SCA_MAX_PORTS];
3841 int port;
3842
3843 /* allocate device instances for up to SCA_MAX_PORTS devices */
3844 for ( port = 0; port < SCA_MAX_PORTS; ++port ) {
3845 port_array[port] = alloc_dev(adapter_num,port,pdev);
3846 if( port_array[port] == NULL ) {
3847 for ( --port; port >= 0; --port )
3848 kfree(port_array[port]);
3849 return;
3850 }
3851 }
3852
3853 /* give copy of port_array to all ports and add to device list */
3854 for ( port = 0; port < SCA_MAX_PORTS; ++port ) {
3855 memcpy(port_array[port]->port_array,port_array,sizeof(port_array));
3856 add_device( port_array[port] );
3857 spin_lock_init(&port_array[port]->lock);
3858 }
3859
3860 /* Allocate and claim adapter resources */
3861 if ( !claim_resources(port_array[0]) ) {
3862
3863 alloc_dma_bufs(port_array[0]);
3864
3865 /* copy resource information from first port to others */
3866 for ( port = 1; port < SCA_MAX_PORTS; ++port ) {
3867 port_array[port]->lock = port_array[0]->lock;
3868 port_array[port]->irq_level = port_array[0]->irq_level;
3869 port_array[port]->memory_base = port_array[0]->memory_base;
3870 port_array[port]->sca_base = port_array[0]->sca_base;
3871 port_array[port]->statctrl_base = port_array[0]->statctrl_base;
3872 port_array[port]->lcr_base = port_array[0]->lcr_base;
3873 alloc_dma_bufs(port_array[port]);
3874 }
3875
3876 if ( request_irq(port_array[0]->irq_level,
3877 synclinkmp_interrupt,
3878 port_array[0]->irq_flags,
3879 port_array[0]->device_name,
3880 port_array[0]) < 0 ) {
3881 printk( "%s(%d):%s Cant request interrupt, IRQ=%d\n",
3882 __FILE__,__LINE__,
3883 port_array[0]->device_name,
3884 port_array[0]->irq_level );
3885 }
3886 else {
3887 port_array[0]->irq_requested = true;
3888 adapter_test(port_array[0]);
3889 }
3890 }
3891 }
3892
3893 static const struct tty_operations ops = {
3894 .open = open,
3895 .close = close,
3896 .write = write,
3897 .put_char = put_char,
3898 .flush_chars = flush_chars,
3899 .write_room = write_room,
3900 .chars_in_buffer = chars_in_buffer,
3901 .flush_buffer = flush_buffer,
3902 .ioctl = ioctl,
3903 .throttle = throttle,
3904 .unthrottle = unthrottle,
3905 .send_xchar = send_xchar,
3906 .break_ctl = set_break,
3907 .wait_until_sent = wait_until_sent,
3908 .read_proc = read_proc,
3909 .set_termios = set_termios,
3910 .stop = tx_hold,
3911 .start = tx_release,
3912 .hangup = hangup,
3913 .tiocmget = tiocmget,
3914 .tiocmset = tiocmset,
3915 };
3916
3917
3918 static void synclinkmp_cleanup(void)
3919 {
3920 int rc;
3921 SLMP_INFO *info;
3922 SLMP_INFO *tmp;
3923
3924 printk("Unloading %s %s\n", driver_name, driver_version);
3925
3926 if (serial_driver) {
3927 if ((rc = tty_unregister_driver(serial_driver)))
3928 printk("%s(%d) failed to unregister tty driver err=%d\n",
3929 __FILE__,__LINE__,rc);
3930 put_tty_driver(serial_driver);
3931 }
3932
3933 /* reset devices */
3934 info = synclinkmp_device_list;
3935 while(info) {
3936 reset_port(info);
3937 info = info->next_device;
3938 }
3939
3940 /* release devices */
3941 info = synclinkmp_device_list;
3942 while(info) {
3943 #if SYNCLINK_GENERIC_HDLC
3944 hdlcdev_exit(info);
3945 #endif
3946 free_dma_bufs(info);
3947 free_tmp_rx_buf(info);
3948 if ( info->port_num == 0 ) {
3949 if (info->sca_base)
3950 write_reg(info, LPR, 1); /* set low power mode */
3951 release_resources(info);
3952 }
3953 tmp = info;
3954 info = info->next_device;
3955 kfree(tmp);
3956 }
3957
3958 pci_unregister_driver(&synclinkmp_pci_driver);
3959 }
3960
3961 /* Driver initialization entry point.
3962 */
3963
3964 static int __init synclinkmp_init(void)
3965 {
3966 int rc;
3967
3968 if (break_on_load) {
3969 synclinkmp_get_text_ptr();
3970 BREAKPOINT();
3971 }
3972
3973 printk("%s %s\n", driver_name, driver_version);
3974
3975 if ((rc = pci_register_driver(&synclinkmp_pci_driver)) < 0) {
3976 printk("%s:failed to register PCI driver, error=%d\n",__FILE__,rc);
3977 return rc;
3978 }
3979
3980 serial_driver = alloc_tty_driver(128);
3981 if (!serial_driver) {
3982 rc = -ENOMEM;
3983 goto error;
3984 }
3985
3986 /* Initialize the tty_driver structure */
3987
3988 serial_driver->owner = THIS_MODULE;
3989 serial_driver->driver_name = "synclinkmp";
3990 serial_driver->name = "ttySLM";
3991 serial_driver->major = ttymajor;
3992 serial_driver->minor_start = 64;
3993 serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
3994 serial_driver->subtype = SERIAL_TYPE_NORMAL;
3995 serial_driver->init_termios = tty_std_termios;
3996 serial_driver->init_termios.c_cflag =
3997 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
3998 serial_driver->init_termios.c_ispeed = 9600;
3999 serial_driver->init_termios.c_ospeed = 9600;
4000 serial_driver->flags = TTY_DRIVER_REAL_RAW;
4001 tty_set_operations(serial_driver, &ops);
4002 if ((rc = tty_register_driver(serial_driver)) < 0) {
4003 printk("%s(%d):Couldn't register serial driver\n",
4004 __FILE__,__LINE__);
4005 put_tty_driver(serial_driver);
4006 serial_driver = NULL;
4007 goto error;
4008 }
4009
4010 printk("%s %s, tty major#%d\n",
4011 driver_name, driver_version,
4012 serial_driver->major);
4013
4014 return 0;
4015
4016 error:
4017 synclinkmp_cleanup();
4018 return rc;
4019 }
4020
4021 static void __exit synclinkmp_exit(void)
4022 {
4023 synclinkmp_cleanup();
4024 }
4025
4026 module_init(synclinkmp_init);
4027 module_exit(synclinkmp_exit);
4028
4029 /* Set the port for internal loopback mode.
4030 * The TxCLK and RxCLK signals are generated from the BRG and
4031 * the TxD is looped back to the RxD internally.
4032 */
4033 static void enable_loopback(SLMP_INFO *info, int enable)
4034 {
4035 if (enable) {
4036 /* MD2 (Mode Register 2)
4037 * 01..00 CNCT<1..0> Channel Connection 11=Local Loopback
4038 */
4039 write_reg(info, MD2, (unsigned char)(read_reg(info, MD2) | (BIT1 + BIT0)));
4040
4041 /* degate external TxC clock source */
4042 info->port_array[0]->ctrlreg_value |= (BIT0 << (info->port_num * 2));
4043 write_control_reg(info);
4044
4045 /* RXS/TXS (Rx/Tx clock source)
4046 * 07 Reserved, must be 0
4047 * 06..04 Clock Source, 100=BRG
4048 * 03..00 Clock Divisor, 0000=1
4049 */
4050 write_reg(info, RXS, 0x40);
4051 write_reg(info, TXS, 0x40);
4052
4053 } else {
4054 /* MD2 (Mode Register 2)
4055 * 01..00 CNCT<1..0> Channel connection, 0=normal
4056 */
4057 write_reg(info, MD2, (unsigned char)(read_reg(info, MD2) & ~(BIT1 + BIT0)));
4058
4059 /* RXS/TXS (Rx/Tx clock source)
4060 * 07 Reserved, must be 0
4061 * 06..04 Clock Source, 000=RxC/TxC Pin
4062 * 03..00 Clock Divisor, 0000=1
4063 */
4064 write_reg(info, RXS, 0x00);
4065 write_reg(info, TXS, 0x00);
4066 }
4067
4068 /* set LinkSpeed if available, otherwise default to 2Mbps */
4069 if (info->params.clock_speed)
4070 set_rate(info, info->params.clock_speed);
4071 else
4072 set_rate(info, 3686400);
4073 }
4074
4075 /* Set the baud rate register to the desired speed
4076 *
4077 * data_rate data rate of clock in bits per second
4078 * A data rate of 0 disables the AUX clock.
4079 */
4080 static void set_rate( SLMP_INFO *info, u32 data_rate )
4081 {
4082 u32 TMCValue;
4083 unsigned char BRValue;
4084 u32 Divisor=0;
4085
4086 /* fBRG = fCLK/(TMC * 2^BR)
4087 */
4088 if (data_rate != 0) {
4089 Divisor = 14745600/data_rate;
4090 if (!Divisor)
4091 Divisor = 1;
4092
4093 TMCValue = Divisor;
4094
4095 BRValue = 0;
4096 if (TMCValue != 1 && TMCValue != 2) {
4097 /* BRValue of 0 provides 50/50 duty cycle *only* when
4098 * TMCValue is 1 or 2. BRValue of 1 to 9 always provides
4099 * 50/50 duty cycle.
4100 */
4101 BRValue = 1;
4102 TMCValue >>= 1;
4103 }
4104
4105 /* while TMCValue is too big for TMC register, divide
4106 * by 2 and increment BR exponent.
4107 */
4108 for(; TMCValue > 256 && BRValue < 10; BRValue++)
4109 TMCValue >>= 1;
4110
4111 write_reg(info, TXS,
4112 (unsigned char)((read_reg(info, TXS) & 0xf0) | BRValue));
4113 write_reg(info, RXS,
4114 (unsigned char)((read_reg(info, RXS) & 0xf0) | BRValue));
4115 write_reg(info, TMC, (unsigned char)TMCValue);
4116 }
4117 else {
4118 write_reg(info, TXS,0);
4119 write_reg(info, RXS,0);
4120 write_reg(info, TMC, 0);
4121 }
4122 }
4123
4124 /* Disable receiver
4125 */
4126 static void rx_stop(SLMP_INFO *info)
4127 {
4128 if (debug_level >= DEBUG_LEVEL_ISR)
4129 printk("%s(%d):%s rx_stop()\n",
4130 __FILE__,__LINE__, info->device_name );
4131
4132 write_reg(info, CMD, RXRESET);
4133
4134 info->ie0_value &= ~RXRDYE;
4135 write_reg(info, IE0, info->ie0_value); /* disable Rx data interrupts */
4136
4137 write_reg(info, RXDMA + DSR, 0); /* disable Rx DMA */
4138 write_reg(info, RXDMA + DCMD, SWABORT); /* reset/init Rx DMA */
4139 write_reg(info, RXDMA + DIR, 0); /* disable Rx DMA interrupts */
4140
4141 info->rx_enabled = false;
4142 info->rx_overflow = false;
4143 }
4144
4145 /* enable the receiver
4146 */
4147 static void rx_start(SLMP_INFO *info)
4148 {
4149 int i;
4150
4151 if (debug_level >= DEBUG_LEVEL_ISR)
4152 printk("%s(%d):%s rx_start()\n",
4153 __FILE__,__LINE__, info->device_name );
4154
4155 write_reg(info, CMD, RXRESET);
4156
4157 if ( info->params.mode == MGSL_MODE_HDLC ) {
4158 /* HDLC, disabe IRQ on rxdata */
4159 info->ie0_value &= ~RXRDYE;
4160 write_reg(info, IE0, info->ie0_value);
4161
4162 /* Reset all Rx DMA buffers and program rx dma */
4163 write_reg(info, RXDMA + DSR, 0); /* disable Rx DMA */
4164 write_reg(info, RXDMA + DCMD, SWABORT); /* reset/init Rx DMA */
4165
4166 for (i = 0; i < info->rx_buf_count; i++) {
4167 info->rx_buf_list[i].status = 0xff;
4168
4169 // throttle to 4 shared memory writes at a time to prevent
4170 // hogging local bus (keep latency time for DMA requests low).
4171 if (!(i % 4))
4172 read_status_reg(info);
4173 }
4174 info->current_rx_buf = 0;
4175
4176 /* set current/1st descriptor address */
4177 write_reg16(info, RXDMA + CDA,
4178 info->rx_buf_list_ex[0].phys_entry);
4179
4180 /* set new last rx descriptor address */
4181 write_reg16(info, RXDMA + EDA,
4182 info->rx_buf_list_ex[info->rx_buf_count - 1].phys_entry);
4183
4184 /* set buffer length (shared by all rx dma data buffers) */
4185 write_reg16(info, RXDMA + BFL, SCABUFSIZE);
4186
4187 write_reg(info, RXDMA + DIR, 0x60); /* enable Rx DMA interrupts (EOM/BOF) */
4188 write_reg(info, RXDMA + DSR, 0xf2); /* clear Rx DMA IRQs, enable Rx DMA */
4189 } else {
4190 /* async, enable IRQ on rxdata */
4191 info->ie0_value |= RXRDYE;
4192 write_reg(info, IE0, info->ie0_value);
4193 }
4194
4195 write_reg(info, CMD, RXENABLE);
4196
4197 info->rx_overflow = false;
4198 info->rx_enabled = true;
4199 }
4200
4201 /* Enable the transmitter and send a transmit frame if
4202 * one is loaded in the DMA buffers.
4203 */
4204 static void tx_start(SLMP_INFO *info)
4205 {
4206 if (debug_level >= DEBUG_LEVEL_ISR)
4207 printk("%s(%d):%s tx_start() tx_count=%d\n",
4208 __FILE__,__LINE__, info->device_name,info->tx_count );
4209
4210 if (!info->tx_enabled ) {
4211 write_reg(info, CMD, TXRESET);
4212 write_reg(info, CMD, TXENABLE);
4213 info->tx_enabled = true;
4214 }
4215
4216 if ( info->tx_count ) {
4217
4218 /* If auto RTS enabled and RTS is inactive, then assert */
4219 /* RTS and set a flag indicating that the driver should */
4220 /* negate RTS when the transmission completes. */
4221
4222 info->drop_rts_on_tx_done = false;
4223
4224 if (info->params.mode != MGSL_MODE_ASYNC) {
4225
4226 if ( info->params.flags & HDLC_FLAG_AUTO_RTS ) {
4227 get_signals( info );
4228 if ( !(info->serial_signals & SerialSignal_RTS) ) {
4229 info->serial_signals |= SerialSignal_RTS;
4230 set_signals( info );
4231 info->drop_rts_on_tx_done = true;
4232 }
4233 }
4234
4235 write_reg16(info, TRC0,
4236 (unsigned short)(((tx_negate_fifo_level-1)<<8) + tx_active_fifo_level));
4237
4238 write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */
4239 write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
4240
4241 /* set TX CDA (current descriptor address) */
4242 write_reg16(info, TXDMA + CDA,
4243 info->tx_buf_list_ex[0].phys_entry);
4244
4245 /* set TX EDA (last descriptor address) */
4246 write_reg16(info, TXDMA + EDA,
4247 info->tx_buf_list_ex[info->last_tx_buf].phys_entry);
4248
4249 /* enable underrun IRQ */
4250 info->ie1_value &= ~IDLE;
4251 info->ie1_value |= UDRN;
4252 write_reg(info, IE1, info->ie1_value);
4253 write_reg(info, SR1, (unsigned char)(IDLE + UDRN));
4254
4255 write_reg(info, TXDMA + DIR, 0x40); /* enable Tx DMA interrupts (EOM) */
4256 write_reg(info, TXDMA + DSR, 0xf2); /* clear Tx DMA IRQs, enable Tx DMA */
4257
4258 mod_timer(&info->tx_timer, jiffies +
4259 msecs_to_jiffies(5000));
4260 }
4261 else {
4262 tx_load_fifo(info);
4263 /* async, enable IRQ on txdata */
4264 info->ie0_value |= TXRDYE;
4265 write_reg(info, IE0, info->ie0_value);
4266 }
4267
4268 info->tx_active = true;
4269 }
4270 }
4271
4272 /* stop the transmitter and DMA
4273 */
4274 static void tx_stop( SLMP_INFO *info )
4275 {
4276 if (debug_level >= DEBUG_LEVEL_ISR)
4277 printk("%s(%d):%s tx_stop()\n",
4278 __FILE__,__LINE__, info->device_name );
4279
4280 del_timer(&info->tx_timer);
4281
4282 write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */
4283 write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */
4284
4285 write_reg(info, CMD, TXRESET);
4286
4287 info->ie1_value &= ~(UDRN + IDLE);
4288 write_reg(info, IE1, info->ie1_value); /* disable tx status interrupts */
4289 write_reg(info, SR1, (unsigned char)(IDLE + UDRN)); /* clear pending */
4290
4291 info->ie0_value &= ~TXRDYE;
4292 write_reg(info, IE0, info->ie0_value); /* disable tx data interrupts */
4293
4294 info->tx_enabled = false;
4295 info->tx_active = false;
4296 }
4297
4298 /* Fill the transmit FIFO until the FIFO is full or
4299 * there is no more data to load.
4300 */
4301 static void tx_load_fifo(SLMP_INFO *info)
4302 {
4303 u8 TwoBytes[2];
4304
4305 /* do nothing is now tx data available and no XON/XOFF pending */
4306
4307 if ( !info->tx_count && !info->x_char )
4308 return;
4309
4310 /* load the Transmit FIFO until FIFOs full or all data sent */
4311
4312 while( info->tx_count && (read_reg(info,SR0) & BIT1) ) {
4313
4314 /* there is more space in the transmit FIFO and */
4315 /* there is more data in transmit buffer */
4316
4317 if ( (info->tx_count > 1) && !info->x_char ) {
4318 /* write 16-bits */
4319 TwoBytes[0] = info->tx_buf[info->tx_get++];
4320 if (info->tx_get >= info->max_frame_size)
4321 info->tx_get -= info->max_frame_size;
4322 TwoBytes[1] = info->tx_buf[info->tx_get++];
4323 if (info->tx_get >= info->max_frame_size)
4324 info->tx_get -= info->max_frame_size;
4325
4326 write_reg16(info, TRB, *((u16 *)TwoBytes));
4327
4328 info->tx_count -= 2;
4329 info->icount.tx += 2;
4330 } else {
4331 /* only 1 byte left to transmit or 1 FIFO slot left */
4332
4333 if (info->x_char) {
4334 /* transmit pending high priority char */
4335 write_reg(info, TRB, info->x_char);
4336 info->x_char = 0;
4337 } else {
4338 write_reg(info, TRB, info->tx_buf[info->tx_get++]);
4339 if (info->tx_get >= info->max_frame_size)
4340 info->tx_get -= info->max_frame_size;
4341 info->tx_count--;
4342 }
4343 info->icount.tx++;
4344 }
4345 }
4346 }
4347
4348 /* Reset a port to a known state
4349 */
4350 static void reset_port(SLMP_INFO *info)
4351 {
4352 if (info->sca_base) {
4353
4354 tx_stop(info);
4355 rx_stop(info);
4356
4357 info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS);
4358 set_signals(info);
4359
4360 /* disable all port interrupts */
4361 info->ie0_value = 0;
4362 info->ie1_value = 0;
4363 info->ie2_value = 0;
4364 write_reg(info, IE0, info->ie0_value);
4365 write_reg(info, IE1, info->ie1_value);
4366 write_reg(info, IE2, info->ie2_value);
4367
4368 write_reg(info, CMD, CHRESET);
4369 }
4370 }
4371
4372 /* Reset all the ports to a known state.
4373 */
4374 static void reset_adapter(SLMP_INFO *info)
4375 {
4376 int i;
4377
4378 for ( i=0; i < SCA_MAX_PORTS; ++i) {
4379 if (info->port_array[i])
4380 reset_port(info->port_array[i]);
4381 }
4382 }
4383
4384 /* Program port for asynchronous communications.
4385 */
4386 static void async_mode(SLMP_INFO *info)
4387 {
4388
4389 unsigned char RegValue;
4390
4391 tx_stop(info);
4392 rx_stop(info);
4393
4394 /* MD0, Mode Register 0
4395 *
4396 * 07..05 PRCTL<2..0>, Protocol Mode, 000=async
4397 * 04 AUTO, Auto-enable (RTS/CTS/DCD)
4398 * 03 Reserved, must be 0
4399 * 02 CRCCC, CRC Calculation, 0=disabled
4400 * 01..00 STOP<1..0> Stop bits (00=1,10=2)
4401 *
4402 * 0000 0000
4403 */
4404 RegValue = 0x00;
4405 if (info->params.stop_bits != 1)
4406 RegValue |= BIT1;
4407 write_reg(info, MD0, RegValue);
4408
4409 /* MD1, Mode Register 1
4410 *
4411 * 07..06 BRATE<1..0>, bit rate, 00=1/1 01=1/16 10=1/32 11=1/64
4412 * 05..04 TXCHR<1..0>, tx char size, 00=8 bits,01=7,10=6,11=5
4413 * 03..02 RXCHR<1..0>, rx char size
4414 * 01..00 PMPM<1..0>, Parity mode, 00=none 10=even 11=odd
4415 *
4416 * 0100 0000
4417 */
4418 RegValue = 0x40;
4419 switch (info->params.data_bits) {
4420 case 7: RegValue |= BIT4 + BIT2; break;
4421 case 6: RegValue |= BIT5 + BIT3; break;
4422 case 5: RegValue |= BIT5 + BIT4 + BIT3 + BIT2; break;
4423 }
4424 if (info->params.parity != ASYNC_PARITY_NONE) {
4425 RegValue |= BIT1;
4426 if (info->params.parity == ASYNC_PARITY_ODD)
4427 RegValue |= BIT0;
4428 }
4429 write_reg(info, MD1, RegValue);
4430
4431 /* MD2, Mode Register 2
4432 *
4433 * 07..02 Reserved, must be 0
4434 * 01..00 CNCT<1..0> Channel connection, 00=normal 11=local loopback
4435 *
4436 * 0000 0000
4437 */
4438 RegValue = 0x00;
4439 if (info->params.loopback)
4440 RegValue |= (BIT1 + BIT0);
4441 write_reg(info, MD2, RegValue);
4442
4443 /* RXS, Receive clock source
4444 *
4445 * 07 Reserved, must be 0
4446 * 06..04 RXCS<2..0>, clock source, 000=RxC Pin, 100=BRG, 110=DPLL
4447 * 03..00 RXBR<3..0>, rate divisor, 0000=1
4448 */
4449 RegValue=BIT6;
4450 write_reg(info, RXS, RegValue);
4451
4452 /* TXS, Transmit clock source
4453 *
4454 * 07 Reserved, must be 0
4455 * 06..04 RXCS<2..0>, clock source, 000=TxC Pin, 100=BRG, 110=Receive Clock
4456 * 03..00 RXBR<3..0>, rate divisor, 0000=1
4457 */
4458 RegValue=BIT6;
4459 write_reg(info, TXS, RegValue);
4460
4461 /* Control Register
4462 *
4463 * 6,4,2,0 CLKSEL<3..0>, 0 = TcCLK in, 1 = Auxclk out
4464 */
4465 info->port_array[0]->ctrlreg_value |= (BIT0 << (info->port_num * 2));
4466 write_control_reg(info);
4467
4468 tx_set_idle(info);
4469
4470 /* RRC Receive Ready Control 0
4471 *
4472 * 07..05 Reserved, must be 0
4473 * 04..00 RRC<4..0> Rx FIFO trigger active 0x00 = 1 byte
4474 */
4475 write_reg(info, RRC, 0x00);
4476
4477 /* TRC0 Transmit Ready Control 0
4478 *
4479 * 07..05 Reserved, must be 0
4480 * 04..00 TRC<4..0> Tx FIFO trigger active 0x10 = 16 bytes
4481 */
4482 write_reg(info, TRC0, 0x10);
4483
4484 /* TRC1 Transmit Ready Control 1
4485 *
4486 * 07..05 Reserved, must be 0
4487 * 04..00 TRC<4..0> Tx FIFO trigger inactive 0x1e = 31 bytes (full-1)
4488 */
4489 write_reg(info, TRC1, 0x1e);
4490
4491 /* CTL, MSCI control register
4492 *
4493 * 07..06 Reserved, set to 0
4494 * 05 UDRNC, underrun control, 0=abort 1=CRC+flag (HDLC/BSC)
4495 * 04 IDLC, idle control, 0=mark 1=idle register
4496 * 03 BRK, break, 0=off 1 =on (async)
4497 * 02 SYNCLD, sync char load enable (BSC) 1=enabled
4498 * 01 GOP, go active on poll (LOOP mode) 1=enabled
4499 * 00 RTS, RTS output control, 0=active 1=inactive
4500 *
4501 * 0001 0001
4502 */
4503 RegValue = 0x10;
4504 if (!(info->serial_signals & SerialSignal_RTS))
4505 RegValue |= 0x01;
4506 write_reg(info, CTL, RegValue);
4507
4508 /* enable status interrupts */
4509 info->ie0_value |= TXINTE + RXINTE;
4510 write_reg(info, IE0, info->ie0_value);
4511
4512 /* enable break detect interrupt */
4513 info->ie1_value = BRKD;
4514 write_reg(info, IE1, info->ie1_value);
4515
4516 /* enable rx overrun interrupt */
4517 info->ie2_value = OVRN;
4518 write_reg(info, IE2, info->ie2_value);
4519
4520 set_rate( info, info->params.data_rate * 16 );
4521 }
4522
4523 /* Program the SCA for HDLC communications.
4524 */
4525 static void hdlc_mode(SLMP_INFO *info)
4526 {
4527 unsigned char RegValue;
4528 u32 DpllDivisor;
4529
4530 // Can't use DPLL because SCA outputs recovered clock on RxC when
4531 // DPLL mode selected. This causes output contention with RxC receiver.
4532 // Use of DPLL would require external hardware to disable RxC receiver
4533 // when DPLL mode selected.
4534 info->params.flags &= ~(HDLC_FLAG_TXC_DPLL + HDLC_FLAG_RXC_DPLL);
4535
4536 /* disable DMA interrupts */
4537 write_reg(info, TXDMA + DIR, 0);
4538 write_reg(info, RXDMA + DIR, 0);
4539
4540 /* MD0, Mode Register 0
4541 *
4542 * 07..05 PRCTL<2..0>, Protocol Mode, 100=HDLC
4543 * 04 AUTO, Auto-enable (RTS/CTS/DCD)
4544 * 03 Reserved, must be 0
4545 * 02 CRCCC, CRC Calculation, 1=enabled
4546 * 01 CRC1, CRC selection, 0=CRC-16,1=CRC-CCITT-16
4547 * 00 CRC0, CRC initial value, 1 = all 1s
4548 *
4549 * 1000 0001
4550 */
4551 RegValue = 0x81;
4552 if (info->params.flags & HDLC_FLAG_AUTO_CTS)
4553 RegValue |= BIT4;
4554 if (info->params.flags & HDLC_FLAG_AUTO_DCD)
4555 RegValue |= BIT4;
4556 if (info->params.crc_type == HDLC_CRC_16_CCITT)
4557 RegValue |= BIT2 + BIT1;
4558 write_reg(info, MD0, RegValue);
4559
4560 /* MD1, Mode Register 1
4561 *
4562 * 07..06 ADDRS<1..0>, Address detect, 00=no addr check
4563 * 05..04 TXCHR<1..0>, tx char size, 00=8 bits
4564 * 03..02 RXCHR<1..0>, rx char size, 00=8 bits
4565 * 01..00 PMPM<1..0>, Parity mode, 00=no parity
4566 *
4567 * 0000 0000
4568 */
4569 RegValue = 0x00;
4570 write_reg(info, MD1, RegValue);
4571
4572 /* MD2, Mode Register 2
4573 *
4574 * 07 NRZFM, 0=NRZ, 1=FM
4575 * 06..05 CODE<1..0> Encoding, 00=NRZ
4576 * 04..03 DRATE<1..0> DPLL Divisor, 00=8
4577 * 02 Reserved, must be 0
4578 * 01..00 CNCT<1..0> Channel connection, 0=normal
4579 *
4580 * 0000 0000
4581 */
4582 RegValue = 0x00;
4583 switch(info->params.encoding) {
4584 case HDLC_ENCODING_NRZI: RegValue |= BIT5; break;
4585 case HDLC_ENCODING_BIPHASE_MARK: RegValue |= BIT7 + BIT5; break; /* aka FM1 */
4586 case HDLC_ENCODING_BIPHASE_SPACE: RegValue |= BIT7 + BIT6; break; /* aka FM0 */
4587 case HDLC_ENCODING_BIPHASE_LEVEL: RegValue |= BIT7; break; /* aka Manchester */
4588 #if 0
4589 case HDLC_ENCODING_NRZB: /* not supported */
4590 case HDLC_ENCODING_NRZI_MARK: /* not supported */
4591 case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: /* not supported */
4592 #endif
4593 }
4594 if ( info->params.flags & HDLC_FLAG_DPLL_DIV16 ) {
4595 DpllDivisor = 16;
4596 RegValue |= BIT3;
4597 } else if ( info->params.flags & HDLC_FLAG_DPLL_DIV8 ) {
4598 DpllDivisor = 8;
4599 } else {
4600 DpllDivisor = 32;
4601 RegValue |= BIT4;
4602 }
4603 write_reg(info, MD2, RegValue);
4604
4605
4606 /* RXS, Receive clock source
4607 *
4608 * 07 Reserved, must be 0
4609 * 06..04 RXCS<2..0>, clock source, 000=RxC Pin, 100=BRG, 110=DPLL
4610 * 03..00 RXBR<3..0>, rate divisor, 0000=1
4611 */
4612 RegValue=0;
4613 if (info->params.flags & HDLC_FLAG_RXC_BRG)
4614 RegValue |= BIT6;
4615 if (info->params.flags & HDLC_FLAG_RXC_DPLL)
4616 RegValue |= BIT6 + BIT5;
4617 write_reg(info, RXS, RegValue);
4618
4619 /* TXS, Transmit clock source
4620 *
4621 * 07 Reserved, must be 0
4622 * 06..04 RXCS<2..0>, clock source, 000=TxC Pin, 100=BRG, 110=Receive Clock
4623 * 03..00 RXBR<3..0>, rate divisor, 0000=1
4624 */
4625 RegValue=0;
4626 if (info->params.flags & HDLC_FLAG_TXC_BRG)
4627 RegValue |= BIT6;
4628 if (info->params.flags & HDLC_FLAG_TXC_DPLL)
4629 RegValue |= BIT6 + BIT5;
4630 write_reg(info, TXS, RegValue);
4631
4632 if (info->params.flags & HDLC_FLAG_RXC_DPLL)
4633 set_rate(info, info->params.clock_speed * DpllDivisor);
4634 else
4635 set_rate(info, info->params.clock_speed);
4636
4637 /* GPDATA (General Purpose I/O Data Register)
4638 *
4639 * 6,4,2,0 CLKSEL<3..0>, 0 = TcCLK in, 1 = Auxclk out
4640 */
4641 if (info->params.flags & HDLC_FLAG_TXC_BRG)
4642 info->port_array[0]->ctrlreg_value |= (BIT0 << (info->port_num * 2));
4643 else
4644 info->port_array[0]->ctrlreg_value &= ~(BIT0 << (info->port_num * 2));
4645 write_control_reg(info);
4646
4647 /* RRC Receive Ready Control 0
4648 *
4649 * 07..05 Reserved, must be 0
4650 * 04..00 RRC<4..0> Rx FIFO trigger active
4651 */
4652 write_reg(info, RRC, rx_active_fifo_level);
4653
4654 /* TRC0 Transmit Ready Control 0
4655 *
4656 * 07..05 Reserved, must be 0
4657 * 04..00 TRC<4..0> Tx FIFO trigger active
4658 */
4659 write_reg(info, TRC0, tx_active_fifo_level);
4660
4661 /* TRC1 Transmit Ready Control 1
4662 *
4663 * 07..05 Reserved, must be 0
4664 * 04..00 TRC<4..0> Tx FIFO trigger inactive 0x1f = 32 bytes (full)
4665 */
4666 write_reg(info, TRC1, (unsigned char)(tx_negate_fifo_level - 1));
4667
4668 /* DMR, DMA Mode Register
4669 *
4670 * 07..05 Reserved, must be 0
4671 * 04 TMOD, Transfer Mode: 1=chained-block
4672 * 03 Reserved, must be 0
4673 * 02 NF, Number of Frames: 1=multi-frame
4674 * 01 CNTE, Frame End IRQ Counter enable: 0=disabled
4675 * 00 Reserved, must be 0
4676 *
4677 * 0001 0100
4678 */
4679 write_reg(info, TXDMA + DMR, 0x14);
4680 write_reg(info, RXDMA + DMR, 0x14);
4681
4682 /* Set chain pointer base (upper 8 bits of 24 bit addr) */
4683 write_reg(info, RXDMA + CPB,
4684 (unsigned char)(info->buffer_list_phys >> 16));
4685
4686 /* Set chain pointer base (upper 8 bits of 24 bit addr) */
4687 write_reg(info, TXDMA + CPB,
4688 (unsigned char)(info->buffer_list_phys >> 16));
4689
4690 /* enable status interrupts. other code enables/disables
4691 * the individual sources for these two interrupt classes.
4692 */
4693 info->ie0_value |= TXINTE + RXINTE;
4694 write_reg(info, IE0, info->ie0_value);
4695
4696 /* CTL, MSCI control register
4697 *
4698 * 07..06 Reserved, set to 0
4699 * 05 UDRNC, underrun control, 0=abort 1=CRC+flag (HDLC/BSC)
4700 * 04 IDLC, idle control, 0=mark 1=idle register
4701 * 03 BRK, break, 0=off 1 =on (async)
4702 * 02 SYNCLD, sync char load enable (BSC) 1=enabled
4703 * 01 GOP, go active on poll (LOOP mode) 1=enabled
4704 * 00 RTS, RTS output control, 0=active 1=inactive
4705 *
4706 * 0001 0001
4707 */
4708 RegValue = 0x10;
4709 if (!(info->serial_signals & SerialSignal_RTS))
4710 RegValue |= 0x01;
4711 write_reg(info, CTL, RegValue);
4712
4713 /* preamble not supported ! */
4714
4715 tx_set_idle(info);
4716 tx_stop(info);
4717 rx_stop(info);
4718
4719 set_rate(info, info->params.clock_speed);
4720
4721 if (info->params.loopback)
4722 enable_loopback(info,1);
4723 }
4724
4725 /* Set the transmit HDLC idle mode
4726 */
4727 static void tx_set_idle(SLMP_INFO *info)
4728 {
4729 unsigned char RegValue = 0xff;
4730
4731 /* Map API idle mode to SCA register bits */
4732 switch(info->idle_mode) {
4733 case HDLC_TXIDLE_FLAGS: RegValue = 0x7e; break;
4734 case HDLC_TXIDLE_ALT_ZEROS_ONES: RegValue = 0xaa; break;
4735 case HDLC_TXIDLE_ZEROS: RegValue = 0x00; break;
4736 case HDLC_TXIDLE_ONES: RegValue = 0xff; break;
4737 case HDLC_TXIDLE_ALT_MARK_SPACE: RegValue = 0xaa; break;
4738 case HDLC_TXIDLE_SPACE: RegValue = 0x00; break;
4739 case HDLC_TXIDLE_MARK: RegValue = 0xff; break;
4740 }
4741
4742 write_reg(info, IDL, RegValue);
4743 }
4744
4745 /* Query the adapter for the state of the V24 status (input) signals.
4746 */
4747 static void get_signals(SLMP_INFO *info)
4748 {
4749 u16 status = read_reg(info, SR3);
4750 u16 gpstatus = read_status_reg(info);
4751 u16 testbit;
4752
4753 /* clear all serial signals except DTR and RTS */
4754 info->serial_signals &= SerialSignal_DTR + SerialSignal_RTS;
4755
4756 /* set serial signal bits to reflect MISR */
4757
4758 if (!(status & BIT3))
4759 info->serial_signals |= SerialSignal_CTS;
4760
4761 if ( !(status & BIT2))
4762 info->serial_signals |= SerialSignal_DCD;
4763
4764 testbit = BIT1 << (info->port_num * 2); // Port 0..3 RI is GPDATA<1,3,5,7>
4765 if (!(gpstatus & testbit))
4766 info->serial_signals |= SerialSignal_RI;
4767
4768 testbit = BIT0 << (info->port_num * 2); // Port 0..3 DSR is GPDATA<0,2,4,6>
4769 if (!(gpstatus & testbit))
4770 info->serial_signals |= SerialSignal_DSR;
4771 }
4772
4773 /* Set the state of DTR and RTS based on contents of
4774 * serial_signals member of device context.
4775 */
4776 static void set_signals(SLMP_INFO *info)
4777 {
4778 unsigned char RegValue;
4779 u16 EnableBit;
4780
4781 RegValue = read_reg(info, CTL);
4782 if (info->serial_signals & SerialSignal_RTS)
4783 RegValue &= ~BIT0;
4784 else
4785 RegValue |= BIT0;
4786 write_reg(info, CTL, RegValue);
4787
4788 // Port 0..3 DTR is ctrl reg <1,3,5,7>
4789 EnableBit = BIT1 << (info->port_num*2);
4790 if (info->serial_signals & SerialSignal_DTR)
4791 info->port_array[0]->ctrlreg_value &= ~EnableBit;
4792 else
4793 info->port_array[0]->ctrlreg_value |= EnableBit;
4794 write_control_reg(info);
4795 }
4796
4797 /*******************/
4798 /* DMA Buffer Code */
4799 /*******************/
4800
4801 /* Set the count for all receive buffers to SCABUFSIZE
4802 * and set the current buffer to the first buffer. This effectively
4803 * makes all buffers free and discards any data in buffers.
4804 */
4805 static void rx_reset_buffers(SLMP_INFO *info)
4806 {
4807 rx_free_frame_buffers(info, 0, info->rx_buf_count - 1);
4808 }
4809
4810 /* Free the buffers used by a received frame
4811 *
4812 * info pointer to device instance data
4813 * first index of 1st receive buffer of frame
4814 * last index of last receive buffer of frame
4815 */
4816 static void rx_free_frame_buffers(SLMP_INFO *info, unsigned int first, unsigned int last)
4817 {
4818 bool done = false;
4819
4820 while(!done) {
4821 /* reset current buffer for reuse */
4822 info->rx_buf_list[first].status = 0xff;
4823
4824 if (first == last) {
4825 done = true;
4826 /* set new last rx descriptor address */
4827 write_reg16(info, RXDMA + EDA, info->rx_buf_list_ex[first].phys_entry);
4828 }
4829
4830 first++;
4831 if (first == info->rx_buf_count)
4832 first = 0;
4833 }
4834
4835 /* set current buffer to next buffer after last buffer of frame */
4836 info->current_rx_buf = first;
4837 }
4838
4839 /* Return a received frame from the receive DMA buffers.
4840 * Only frames received without errors are returned.
4841 *
4842 * Return Value: true if frame returned, otherwise false
4843 */
4844 static bool rx_get_frame(SLMP_INFO *info)
4845 {
4846 unsigned int StartIndex, EndIndex; /* index of 1st and last buffers of Rx frame */
4847 unsigned short status;
4848 unsigned int framesize = 0;
4849 bool ReturnCode = false;
4850 unsigned long flags;
4851 struct tty_struct *tty = info->port.tty;
4852 unsigned char addr_field = 0xff;
4853 SCADESC *desc;
4854 SCADESC_EX *desc_ex;
4855
4856 CheckAgain:
4857 /* assume no frame returned, set zero length */
4858 framesize = 0;
4859 addr_field = 0xff;
4860
4861 /*
4862 * current_rx_buf points to the 1st buffer of the next available
4863 * receive frame. To find the last buffer of the frame look for
4864 * a non-zero status field in the buffer entries. (The status
4865 * field is set by the 16C32 after completing a receive frame.
4866 */
4867 StartIndex = EndIndex = info->current_rx_buf;
4868
4869 for ( ;; ) {
4870 desc = &info->rx_buf_list[EndIndex];
4871 desc_ex = &info->rx_buf_list_ex[EndIndex];
4872
4873 if (desc->status == 0xff)
4874 goto Cleanup; /* current desc still in use, no frames available */
4875
4876 if (framesize == 0 && info->params.addr_filter != 0xff)
4877 addr_field = desc_ex->virt_addr[0];
4878
4879 framesize += desc->length;
4880
4881 /* Status != 0 means last buffer of frame */
4882 if (desc->status)
4883 break;
4884
4885 EndIndex++;
4886 if (EndIndex == info->rx_buf_count)
4887 EndIndex = 0;
4888
4889 if (EndIndex == info->current_rx_buf) {
4890 /* all buffers have been 'used' but none mark */
4891 /* the end of a frame. Reset buffers and receiver. */
4892 if ( info->rx_enabled ){
4893 spin_lock_irqsave(&info->lock,flags);
4894 rx_start(info);
4895 spin_unlock_irqrestore(&info->lock,flags);
4896 }
4897 goto Cleanup;
4898 }
4899
4900 }
4901
4902 /* check status of receive frame */
4903
4904 /* frame status is byte stored after frame data
4905 *
4906 * 7 EOM (end of msg), 1 = last buffer of frame
4907 * 6 Short Frame, 1 = short frame
4908 * 5 Abort, 1 = frame aborted
4909 * 4 Residue, 1 = last byte is partial
4910 * 3 Overrun, 1 = overrun occurred during frame reception
4911 * 2 CRC, 1 = CRC error detected
4912 *
4913 */
4914 status = desc->status;
4915
4916 /* ignore CRC bit if not using CRC (bit is undefined) */
4917 /* Note:CRC is not save to data buffer */
4918 if (info->params.crc_type == HDLC_CRC_NONE)
4919 status &= ~BIT2;
4920
4921 if (framesize == 0 ||
4922 (addr_field != 0xff && addr_field != info->params.addr_filter)) {
4923 /* discard 0 byte frames, this seems to occur sometime
4924 * when remote is idling flags.
4925 */
4926 rx_free_frame_buffers(info, StartIndex, EndIndex);
4927 goto CheckAgain;
4928 }
4929
4930 if (framesize < 2)
4931 status |= BIT6;
4932
4933 if (status & (BIT6+BIT5+BIT3+BIT2)) {
4934 /* received frame has errors,
4935 * update counts and mark frame size as 0
4936 */
4937 if (status & BIT6)
4938 info->icount.rxshort++;
4939 else if (status & BIT5)
4940 info->icount.rxabort++;
4941 else if (status & BIT3)
4942 info->icount.rxover++;
4943 else
4944 info->icount.rxcrc++;
4945
4946 framesize = 0;
4947 #if SYNCLINK_GENERIC_HDLC
4948 {
4949 info->netdev->stats.rx_errors++;
4950 info->netdev->stats.rx_frame_errors++;
4951 }
4952 #endif
4953 }
4954
4955 if ( debug_level >= DEBUG_LEVEL_BH )
4956 printk("%s(%d):%s rx_get_frame() status=%04X size=%d\n",
4957 __FILE__,__LINE__,info->device_name,status,framesize);
4958
4959 if ( debug_level >= DEBUG_LEVEL_DATA )
4960 trace_block(info,info->rx_buf_list_ex[StartIndex].virt_addr,
4961 min_t(int, framesize,SCABUFSIZE),0);
4962
4963 if (framesize) {
4964 if (framesize > info->max_frame_size)
4965 info->icount.rxlong++;
4966 else {
4967 /* copy dma buffer(s) to contiguous intermediate buffer */
4968 int copy_count = framesize;
4969 int index = StartIndex;
4970 unsigned char *ptmp = info->tmp_rx_buf;
4971 info->tmp_rx_buf_count = framesize;
4972
4973 info->icount.rxok++;
4974
4975 while(copy_count) {
4976 int partial_count = min(copy_count,SCABUFSIZE);
4977 memcpy( ptmp,
4978 info->rx_buf_list_ex[index].virt_addr,
4979 partial_count );
4980 ptmp += partial_count;
4981 copy_count -= partial_count;
4982
4983 if ( ++index == info->rx_buf_count )
4984 index = 0;
4985 }
4986
4987 #if SYNCLINK_GENERIC_HDLC
4988 if (info->netcount)
4989 hdlcdev_rx(info,info->tmp_rx_buf,framesize);
4990 else
4991 #endif
4992 ldisc_receive_buf(tty,info->tmp_rx_buf,
4993 info->flag_buf, framesize);
4994 }
4995 }
4996 /* Free the buffers used by this frame. */
4997 rx_free_frame_buffers( info, StartIndex, EndIndex );
4998
4999 ReturnCode = true;
5000
5001 Cleanup:
5002 if ( info->rx_enabled && info->rx_overflow ) {
5003 /* Receiver is enabled, but needs to restarted due to
5004 * rx buffer overflow. If buffers are empty, restart receiver.
5005 */
5006 if (info->rx_buf_list[EndIndex].status == 0xff) {
5007 spin_lock_irqsave(&info->lock,flags);
5008 rx_start(info);
5009 spin_unlock_irqrestore(&info->lock,flags);
5010 }
5011 }
5012
5013 return ReturnCode;
5014 }
5015
5016 /* load the transmit DMA buffer with data
5017 */
5018 static void tx_load_dma_buffer(SLMP_INFO *info, const char *buf, unsigned int count)
5019 {
5020 unsigned short copy_count;
5021 unsigned int i = 0;
5022 SCADESC *desc;
5023 SCADESC_EX *desc_ex;
5024
5025 if ( debug_level >= DEBUG_LEVEL_DATA )
5026 trace_block(info,buf, min_t(int, count,SCABUFSIZE), 1);
5027
5028 /* Copy source buffer to one or more DMA buffers, starting with
5029 * the first transmit dma buffer.
5030 */
5031 for(i=0;;)
5032 {
5033 copy_count = min_t(unsigned short,count,SCABUFSIZE);
5034
5035 desc = &info->tx_buf_list[i];
5036 desc_ex = &info->tx_buf_list_ex[i];
5037
5038 load_pci_memory(info, desc_ex->virt_addr,buf,copy_count);
5039
5040 desc->length = copy_count;
5041 desc->status = 0;
5042
5043 buf += copy_count;
5044 count -= copy_count;
5045
5046 if (!count)
5047 break;
5048
5049 i++;
5050 if (i >= info->tx_buf_count)
5051 i = 0;
5052 }
5053
5054 info->tx_buf_list[i].status = 0x81; /* set EOM and EOT status */
5055 info->last_tx_buf = ++i;
5056 }
5057
5058 static bool register_test(SLMP_INFO *info)
5059 {
5060 static unsigned char testval[] = {0x00, 0xff, 0xaa, 0x55, 0x69, 0x96};
5061 static unsigned int count = ARRAY_SIZE(testval);
5062 unsigned int i;
5063 bool rc = true;
5064 unsigned long flags;
5065
5066 spin_lock_irqsave(&info->lock,flags);
5067 reset_port(info);
5068
5069 /* assume failure */
5070 info->init_error = DiagStatus_AddressFailure;
5071
5072 /* Write bit patterns to various registers but do it out of */
5073 /* sync, then read back and verify values. */
5074
5075 for (i = 0 ; i < count ; i++) {
5076 write_reg(info, TMC, testval[i]);
5077 write_reg(info, IDL, testval[(i+1)%count]);
5078 write_reg(info, SA0, testval[(i+2)%count]);
5079 write_reg(info, SA1, testval[(i+3)%count]);
5080
5081 if ( (read_reg(info, TMC) != testval[i]) ||
5082 (read_reg(info, IDL) != testval[(i+1)%count]) ||
5083 (read_reg(info, SA0) != testval[(i+2)%count]) ||
5084 (read_reg(info, SA1) != testval[(i+3)%count]) )
5085 {
5086 rc = false;
5087 break;
5088 }
5089 }
5090
5091 reset_port(info);
5092 spin_unlock_irqrestore(&info->lock,flags);
5093
5094 return rc;
5095 }
5096
5097 static bool irq_test(SLMP_INFO *info)
5098 {
5099 unsigned long timeout;
5100 unsigned long flags;
5101
5102 unsigned char timer = (info->port_num & 1) ? TIMER2 : TIMER0;
5103
5104 spin_lock_irqsave(&info->lock,flags);
5105 reset_port(info);
5106
5107 /* assume failure */
5108 info->init_error = DiagStatus_IrqFailure;
5109 info->irq_occurred = false;
5110
5111 /* setup timer0 on SCA0 to interrupt */
5112
5113 /* IER2<7..4> = timer<3..0> interrupt enables (1=enabled) */
5114 write_reg(info, IER2, (unsigned char)((info->port_num & 1) ? BIT6 : BIT4));
5115
5116 write_reg(info, (unsigned char)(timer + TEPR), 0); /* timer expand prescale */
5117 write_reg16(info, (unsigned char)(timer + TCONR), 1); /* timer constant */
5118
5119
5120 /* TMCS, Timer Control/Status Register
5121 *
5122 * 07 CMF, Compare match flag (read only) 1=match
5123 * 06 ECMI, CMF Interrupt Enable: 1=enabled
5124 * 05 Reserved, must be 0
5125 * 04 TME, Timer Enable
5126 * 03..00 Reserved, must be 0
5127 *
5128 * 0101 0000
5129 */
5130 write_reg(info, (unsigned char)(timer + TMCS), 0x50);
5131
5132 spin_unlock_irqrestore(&info->lock,flags);
5133
5134 timeout=100;
5135 while( timeout-- && !info->irq_occurred ) {
5136 msleep_interruptible(10);
5137 }
5138
5139 spin_lock_irqsave(&info->lock,flags);
5140 reset_port(info);
5141 spin_unlock_irqrestore(&info->lock,flags);
5142
5143 return info->irq_occurred;
5144 }
5145
5146 /* initialize individual SCA device (2 ports)
5147 */
5148 static bool sca_init(SLMP_INFO *info)
5149 {
5150 /* set wait controller to single mem partition (low), no wait states */
5151 write_reg(info, PABR0, 0); /* wait controller addr boundary 0 */
5152 write_reg(info, PABR1, 0); /* wait controller addr boundary 1 */
5153 write_reg(info, WCRL, 0); /* wait controller low range */
5154 write_reg(info, WCRM, 0); /* wait controller mid range */
5155 write_reg(info, WCRH, 0); /* wait controller high range */
5156
5157 /* DPCR, DMA Priority Control
5158 *
5159 * 07..05 Not used, must be 0
5160 * 04 BRC, bus release condition: 0=all transfers complete
5161 * 03 CCC, channel change condition: 0=every cycle
5162 * 02..00 PR<2..0>, priority 100=round robin
5163 *
5164 * 00000100 = 0x04
5165 */
5166 write_reg(info, DPCR, dma_priority);
5167
5168 /* DMA Master Enable, BIT7: 1=enable all channels */
5169 write_reg(info, DMER, 0x80);
5170
5171 /* enable all interrupt classes */
5172 write_reg(info, IER0, 0xff); /* TxRDY,RxRDY,TxINT,RxINT (ports 0-1) */
5173 write_reg(info, IER1, 0xff); /* DMIB,DMIA (channels 0-3) */
5174 write_reg(info, IER2, 0xf0); /* TIRQ (timers 0-3) */
5175
5176 /* ITCR, interrupt control register
5177 * 07 IPC, interrupt priority, 0=MSCI->DMA
5178 * 06..05 IAK<1..0>, Acknowledge cycle, 00=non-ack cycle
5179 * 04 VOS, Vector Output, 0=unmodified vector
5180 * 03..00 Reserved, must be 0
5181 */
5182 write_reg(info, ITCR, 0);
5183
5184 return true;
5185 }
5186
5187 /* initialize adapter hardware
5188 */
5189 static bool init_adapter(SLMP_INFO *info)
5190 {
5191 int i;
5192
5193 /* Set BIT30 of Local Control Reg 0x50 to reset SCA */
5194 volatile u32 *MiscCtrl = (u32 *)(info->lcr_base + 0x50);
5195 u32 readval;
5196
5197 info->misc_ctrl_value |= BIT30;
5198 *MiscCtrl = info->misc_ctrl_value;
5199
5200 /*
5201 * Force at least 170ns delay before clearing
5202 * reset bit. Each read from LCR takes at least
5203 * 30ns so 10 times for 300ns to be safe.
5204 */
5205 for(i=0;i<10;i++)
5206 readval = *MiscCtrl;
5207
5208 info->misc_ctrl_value &= ~BIT30;
5209 *MiscCtrl = info->misc_ctrl_value;
5210
5211 /* init control reg (all DTRs off, all clksel=input) */
5212 info->ctrlreg_value = 0xaa;
5213 write_control_reg(info);
5214
5215 {
5216 volatile u32 *LCR1BRDR = (u32 *)(info->lcr_base + 0x2c);
5217 lcr1_brdr_value &= ~(BIT5 + BIT4 + BIT3);
5218
5219 switch(read_ahead_count)
5220 {
5221 case 16:
5222 lcr1_brdr_value |= BIT5 + BIT4 + BIT3;
5223 break;
5224 case 8:
5225 lcr1_brdr_value |= BIT5 + BIT4;
5226 break;
5227 case 4:
5228 lcr1_brdr_value |= BIT5 + BIT3;
5229 break;
5230 case 0:
5231 lcr1_brdr_value |= BIT5;
5232 break;
5233 }
5234
5235 *LCR1BRDR = lcr1_brdr_value;
5236 *MiscCtrl = misc_ctrl_value;
5237 }
5238
5239 sca_init(info->port_array[0]);
5240 sca_init(info->port_array[2]);
5241
5242 return true;
5243 }
5244
5245 /* Loopback an HDLC frame to test the hardware
5246 * interrupt and DMA functions.
5247 */
5248 static bool loopback_test(SLMP_INFO *info)
5249 {
5250 #define TESTFRAMESIZE 20
5251
5252 unsigned long timeout;
5253 u16 count = TESTFRAMESIZE;
5254 unsigned char buf[TESTFRAMESIZE];
5255 bool rc = false;
5256 unsigned long flags;
5257
5258 struct tty_struct *oldtty = info->port.tty;
5259 u32 speed = info->params.clock_speed;
5260
5261 info->params.clock_speed = 3686400;
5262 info->port.tty = NULL;
5263
5264 /* assume failure */
5265 info->init_error = DiagStatus_DmaFailure;
5266
5267 /* build and send transmit frame */
5268 for (count = 0; count < TESTFRAMESIZE;++count)
5269 buf[count] = (unsigned char)count;
5270
5271 memset(info->tmp_rx_buf,0,TESTFRAMESIZE);
5272
5273 /* program hardware for HDLC and enabled receiver */
5274 spin_lock_irqsave(&info->lock,flags);
5275 hdlc_mode(info);
5276 enable_loopback(info,1);
5277 rx_start(info);
5278 info->tx_count = count;
5279 tx_load_dma_buffer(info,buf,count);
5280 tx_start(info);
5281 spin_unlock_irqrestore(&info->lock,flags);
5282
5283 /* wait for receive complete */
5284 /* Set a timeout for waiting for interrupt. */
5285 for ( timeout = 100; timeout; --timeout ) {
5286 msleep_interruptible(10);
5287
5288 if (rx_get_frame(info)) {
5289 rc = true;
5290 break;
5291 }
5292 }
5293
5294 /* verify received frame length and contents */
5295 if (rc &&
5296 ( info->tmp_rx_buf_count != count ||
5297 memcmp(buf, info->tmp_rx_buf,count))) {
5298 rc = false;
5299 }
5300
5301 spin_lock_irqsave(&info->lock,flags);
5302 reset_adapter(info);
5303 spin_unlock_irqrestore(&info->lock,flags);
5304
5305 info->params.clock_speed = speed;
5306 info->port.tty = oldtty;
5307
5308 return rc;
5309 }
5310
5311 /* Perform diagnostics on hardware
5312 */
5313 static int adapter_test( SLMP_INFO *info )
5314 {
5315 unsigned long flags;
5316 if ( debug_level >= DEBUG_LEVEL_INFO )
5317 printk( "%s(%d):Testing device %s\n",
5318 __FILE__,__LINE__,info->device_name );
5319
5320 spin_lock_irqsave(&info->lock,flags);
5321 init_adapter(info);
5322 spin_unlock_irqrestore(&info->lock,flags);
5323
5324 info->port_array[0]->port_count = 0;
5325
5326 if ( register_test(info->port_array[0]) &&
5327 register_test(info->port_array[1])) {
5328
5329 info->port_array[0]->port_count = 2;
5330
5331 if ( register_test(info->port_array[2]) &&
5332 register_test(info->port_array[3]) )
5333 info->port_array[0]->port_count += 2;
5334 }
5335 else {
5336 printk( "%s(%d):Register test failure for device %s Addr=%08lX\n",
5337 __FILE__,__LINE__,info->device_name, (unsigned long)(info->phys_sca_base));
5338 return -ENODEV;
5339 }
5340
5341 if ( !irq_test(info->port_array[0]) ||
5342 !irq_test(info->port_array[1]) ||
5343 (info->port_count == 4 && !irq_test(info->port_array[2])) ||
5344 (info->port_count == 4 && !irq_test(info->port_array[3]))) {
5345 printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n",
5346 __FILE__,__LINE__,info->device_name, (unsigned short)(info->irq_level) );
5347 return -ENODEV;
5348 }
5349
5350 if (!loopback_test(info->port_array[0]) ||
5351 !loopback_test(info->port_array[1]) ||
5352 (info->port_count == 4 && !loopback_test(info->port_array[2])) ||
5353 (info->port_count == 4 && !loopback_test(info->port_array[3]))) {
5354 printk( "%s(%d):DMA test failure for device %s\n",
5355 __FILE__,__LINE__,info->device_name);
5356 return -ENODEV;
5357 }
5358
5359 if ( debug_level >= DEBUG_LEVEL_INFO )
5360 printk( "%s(%d):device %s passed diagnostics\n",
5361 __FILE__,__LINE__,info->device_name );
5362
5363 info->port_array[0]->init_error = 0;
5364 info->port_array[1]->init_error = 0;
5365 if ( info->port_count > 2 ) {
5366 info->port_array[2]->init_error = 0;
5367 info->port_array[3]->init_error = 0;
5368 }
5369
5370 return 0;
5371 }
5372
5373 /* Test the shared memory on a PCI adapter.
5374 */
5375 static bool memory_test(SLMP_INFO *info)
5376 {
5377 static unsigned long testval[] = { 0x0, 0x55555555, 0xaaaaaaaa,
5378 0x66666666, 0x99999999, 0xffffffff, 0x12345678 };
5379 unsigned long count = ARRAY_SIZE(testval);
5380 unsigned long i;
5381 unsigned long limit = SCA_MEM_SIZE/sizeof(unsigned long);
5382 unsigned long * addr = (unsigned long *)info->memory_base;
5383
5384 /* Test data lines with test pattern at one location. */
5385
5386 for ( i = 0 ; i < count ; i++ ) {
5387 *addr = testval[i];
5388 if ( *addr != testval[i] )
5389 return false;
5390 }
5391
5392 /* Test address lines with incrementing pattern over */
5393 /* entire address range. */
5394
5395 for ( i = 0 ; i < limit ; i++ ) {
5396 *addr = i * 4;
5397 addr++;
5398 }
5399
5400 addr = (unsigned long *)info->memory_base;
5401
5402 for ( i = 0 ; i < limit ; i++ ) {
5403 if ( *addr != i * 4 )
5404 return false;
5405 addr++;
5406 }
5407
5408 memset( info->memory_base, 0, SCA_MEM_SIZE );
5409 return true;
5410 }
5411
5412 /* Load data into PCI adapter shared memory.
5413 *
5414 * The PCI9050 releases control of the local bus
5415 * after completing the current read or write operation.
5416 *
5417 * While the PCI9050 write FIFO not empty, the
5418 * PCI9050 treats all of the writes as a single transaction
5419 * and does not release the bus. This causes DMA latency problems
5420 * at high speeds when copying large data blocks to the shared memory.
5421 *
5422 * This function breaks a write into multiple transations by
5423 * interleaving a read which flushes the write FIFO and 'completes'
5424 * the write transation. This allows any pending DMA request to gain control
5425 * of the local bus in a timely fasion.
5426 */
5427 static void load_pci_memory(SLMP_INFO *info, char* dest, const char* src, unsigned short count)
5428 {
5429 /* A load interval of 16 allows for 4 32-bit writes at */
5430 /* 136ns each for a maximum latency of 542ns on the local bus.*/
5431
5432 unsigned short interval = count / sca_pci_load_interval;
5433 unsigned short i;
5434
5435 for ( i = 0 ; i < interval ; i++ )
5436 {
5437 memcpy(dest, src, sca_pci_load_interval);
5438 read_status_reg(info);
5439 dest += sca_pci_load_interval;
5440 src += sca_pci_load_interval;
5441 }
5442
5443 memcpy(dest, src, count % sca_pci_load_interval);
5444 }
5445
5446 static void trace_block(SLMP_INFO *info,const char* data, int count, int xmit)
5447 {
5448 int i;
5449 int linecount;
5450 if (xmit)
5451 printk("%s tx data:\n",info->device_name);
5452 else
5453 printk("%s rx data:\n",info->device_name);
5454
5455 while(count) {
5456 if (count > 16)
5457 linecount = 16;
5458 else
5459 linecount = count;
5460
5461 for(i=0;i<linecount;i++)
5462 printk("%02X ",(unsigned char)data[i]);
5463 for(;i<17;i++)
5464 printk(" ");
5465 for(i=0;i<linecount;i++) {
5466 if (data[i]>=040 && data[i]<=0176)
5467 printk("%c",data[i]);
5468 else
5469 printk(".");
5470 }
5471 printk("\n");
5472
5473 data += linecount;
5474 count -= linecount;
5475 }
5476 } /* end of trace_block() */
5477
5478 /* called when HDLC frame times out
5479 * update stats and do tx completion processing
5480 */
5481 static void tx_timeout(unsigned long context)
5482 {
5483 SLMP_INFO *info = (SLMP_INFO*)context;
5484 unsigned long flags;
5485
5486 if ( debug_level >= DEBUG_LEVEL_INFO )
5487 printk( "%s(%d):%s tx_timeout()\n",
5488 __FILE__,__LINE__,info->device_name);
5489 if(info->tx_active && info->params.mode == MGSL_MODE_HDLC) {
5490 info->icount.txtimeout++;
5491 }
5492 spin_lock_irqsave(&info->lock,flags);
5493 info->tx_active = false;
5494 info->tx_count = info->tx_put = info->tx_get = 0;
5495
5496 spin_unlock_irqrestore(&info->lock,flags);
5497
5498 #if SYNCLINK_GENERIC_HDLC
5499 if (info->netcount)
5500 hdlcdev_tx_done(info);
5501 else
5502 #endif
5503 bh_transmit(info);
5504 }
5505
5506 /* called to periodically check the DSR/RI modem signal input status
5507 */
5508 static void status_timeout(unsigned long context)
5509 {
5510 u16 status = 0;
5511 SLMP_INFO *info = (SLMP_INFO*)context;
5512 unsigned long flags;
5513 unsigned char delta;
5514
5515
5516 spin_lock_irqsave(&info->lock,flags);
5517 get_signals(info);
5518 spin_unlock_irqrestore(&info->lock,flags);
5519
5520 /* check for DSR/RI state change */
5521
5522 delta = info->old_signals ^ info->serial_signals;
5523 info->old_signals = info->serial_signals;
5524
5525 if (delta & SerialSignal_DSR)
5526 status |= MISCSTATUS_DSR_LATCHED|(info->serial_signals&SerialSignal_DSR);
5527
5528 if (delta & SerialSignal_RI)
5529 status |= MISCSTATUS_RI_LATCHED|(info->serial_signals&SerialSignal_RI);
5530
5531 if (delta & SerialSignal_DCD)
5532 status |= MISCSTATUS_DCD_LATCHED|(info->serial_signals&SerialSignal_DCD);
5533
5534 if (delta & SerialSignal_CTS)
5535 status |= MISCSTATUS_CTS_LATCHED|(info->serial_signals&SerialSignal_CTS);
5536
5537 if (status)
5538 isr_io_pin(info,status);
5539
5540 mod_timer(&info->status_timer, jiffies + msecs_to_jiffies(10));
5541 }
5542
5543
5544 /* Register Access Routines -
5545 * All registers are memory mapped
5546 */
5547 #define CALC_REGADDR() \
5548 unsigned char * RegAddr = (unsigned char*)(info->sca_base + Addr); \
5549 if (info->port_num > 1) \
5550 RegAddr += 256; /* port 0-1 SCA0, 2-3 SCA1 */ \
5551 if ( info->port_num & 1) { \
5552 if (Addr > 0x7f) \
5553 RegAddr += 0x40; /* DMA access */ \
5554 else if (Addr > 0x1f && Addr < 0x60) \
5555 RegAddr += 0x20; /* MSCI access */ \
5556 }
5557
5558
5559 static unsigned char read_reg(SLMP_INFO * info, unsigned char Addr)
5560 {
5561 CALC_REGADDR();
5562 return *RegAddr;
5563 }
5564 static void write_reg(SLMP_INFO * info, unsigned char Addr, unsigned char Value)
5565 {
5566 CALC_REGADDR();
5567 *RegAddr = Value;
5568 }
5569
5570 static u16 read_reg16(SLMP_INFO * info, unsigned char Addr)
5571 {
5572 CALC_REGADDR();
5573 return *((u16 *)RegAddr);
5574 }
5575
5576 static void write_reg16(SLMP_INFO * info, unsigned char Addr, u16 Value)
5577 {
5578 CALC_REGADDR();
5579 *((u16 *)RegAddr) = Value;
5580 }
5581
5582 static unsigned char read_status_reg(SLMP_INFO * info)
5583 {
5584 unsigned char *RegAddr = (unsigned char *)info->statctrl_base;
5585 return *RegAddr;
5586 }
5587
5588 static void write_control_reg(SLMP_INFO * info)
5589 {
5590 unsigned char *RegAddr = (unsigned char *)info->statctrl_base;
5591 *RegAddr = info->port_array[0]->ctrlreg_value;
5592 }
5593
5594
5595 static int __devinit synclinkmp_init_one (struct pci_dev *dev,
5596 const struct pci_device_id *ent)
5597 {
5598 if (pci_enable_device(dev)) {
5599 printk("error enabling pci device %p\n", dev);
5600 return -EIO;
5601 }
5602 device_init( ++synclinkmp_adapter_count, dev );
5603 return 0;
5604 }
5605
5606 static void __devexit synclinkmp_remove_one (struct pci_dev *dev)
5607 {
5608 }
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