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1da177e4 LT |
1 | /* |
2 | * linux/drivers/char/pcmcia/synclink_cs.c | |
3 | * | |
a7482a2e | 4 | * $Id: synclink_cs.c,v 4.34 2005/09/08 13:20:54 paulkf Exp $ |
1da177e4 LT |
5 | * |
6 | * Device driver for Microgate SyncLink PC Card | |
7 | * multiprotocol serial adapter. | |
8 | * | |
9 | * written by Paul Fulghum for Microgate Corporation | |
10 | * paulkf@microgate.com | |
11 | * | |
12 | * Microgate and SyncLink are trademarks of Microgate Corporation | |
13 | * | |
14 | * This code is released under the GNU General Public License (GPL) | |
15 | * | |
16 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
17 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
18 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
19 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, | |
20 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
21 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
22 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
23 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
24 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
26 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
27 | */ | |
28 | ||
29 | #define VERSION(ver,rel,seq) (((ver)<<16) | ((rel)<<8) | (seq)) | |
30 | #if defined(__i386__) | |
31 | # define BREAKPOINT() asm(" int $3"); | |
32 | #else | |
33 | # define BREAKPOINT() { } | |
34 | #endif | |
35 | ||
36 | #define MAX_DEVICE_COUNT 4 | |
37 | ||
38 | #include <linux/config.h> | |
39 | #include <linux/module.h> | |
40 | #include <linux/errno.h> | |
41 | #include <linux/signal.h> | |
42 | #include <linux/sched.h> | |
43 | #include <linux/timer.h> | |
44 | #include <linux/time.h> | |
45 | #include <linux/interrupt.h> | |
46 | #include <linux/pci.h> | |
47 | #include <linux/tty.h> | |
48 | #include <linux/tty_flip.h> | |
49 | #include <linux/serial.h> | |
50 | #include <linux/major.h> | |
51 | #include <linux/string.h> | |
52 | #include <linux/fcntl.h> | |
53 | #include <linux/ptrace.h> | |
54 | #include <linux/ioport.h> | |
55 | #include <linux/mm.h> | |
56 | #include <linux/slab.h> | |
57 | #include <linux/netdevice.h> | |
58 | #include <linux/vmalloc.h> | |
59 | #include <linux/init.h> | |
60 | #include <asm/serial.h> | |
61 | #include <linux/delay.h> | |
62 | #include <linux/ioctl.h> | |
63 | ||
64 | #include <asm/system.h> | |
65 | #include <asm/io.h> | |
66 | #include <asm/irq.h> | |
67 | #include <asm/dma.h> | |
68 | #include <linux/bitops.h> | |
69 | #include <asm/types.h> | |
70 | #include <linux/termios.h> | |
71 | #include <linux/workqueue.h> | |
72 | #include <linux/hdlc.h> | |
73 | ||
1da177e4 LT |
74 | #include <pcmcia/cs_types.h> |
75 | #include <pcmcia/cs.h> | |
76 | #include <pcmcia/cistpl.h> | |
77 | #include <pcmcia/cisreg.h> | |
78 | #include <pcmcia/ds.h> | |
79 | ||
80 | #ifdef CONFIG_HDLC_MODULE | |
81 | #define CONFIG_HDLC 1 | |
82 | #endif | |
83 | ||
84 | #define GET_USER(error,value,addr) error = get_user(value,addr) | |
85 | #define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0 | |
86 | #define PUT_USER(error,value,addr) error = put_user(value,addr) | |
87 | #define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0 | |
88 | ||
89 | #include <asm/uaccess.h> | |
90 | ||
91 | #include "linux/synclink.h" | |
92 | ||
93 | static MGSL_PARAMS default_params = { | |
94 | MGSL_MODE_HDLC, /* unsigned long mode */ | |
95 | 0, /* unsigned char loopback; */ | |
96 | HDLC_FLAG_UNDERRUN_ABORT15, /* unsigned short flags; */ | |
97 | HDLC_ENCODING_NRZI_SPACE, /* unsigned char encoding; */ | |
98 | 0, /* unsigned long clock_speed; */ | |
99 | 0xff, /* unsigned char addr_filter; */ | |
100 | HDLC_CRC_16_CCITT, /* unsigned short crc_type; */ | |
101 | HDLC_PREAMBLE_LENGTH_8BITS, /* unsigned char preamble_length; */ | |
102 | HDLC_PREAMBLE_PATTERN_NONE, /* unsigned char preamble; */ | |
103 | 9600, /* unsigned long data_rate; */ | |
104 | 8, /* unsigned char data_bits; */ | |
105 | 1, /* unsigned char stop_bits; */ | |
106 | ASYNC_PARITY_NONE /* unsigned char parity; */ | |
107 | }; | |
108 | ||
109 | typedef struct | |
110 | { | |
111 | int count; | |
112 | unsigned char status; | |
113 | char data[1]; | |
114 | } RXBUF; | |
115 | ||
116 | /* The queue of BH actions to be performed */ | |
117 | ||
118 | #define BH_RECEIVE 1 | |
119 | #define BH_TRANSMIT 2 | |
120 | #define BH_STATUS 4 | |
121 | ||
122 | #define IO_PIN_SHUTDOWN_LIMIT 100 | |
123 | ||
124 | #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK)) | |
125 | ||
126 | struct _input_signal_events { | |
127 | int ri_up; | |
128 | int ri_down; | |
129 | int dsr_up; | |
130 | int dsr_down; | |
131 | int dcd_up; | |
132 | int dcd_down; | |
133 | int cts_up; | |
134 | int cts_down; | |
135 | }; | |
136 | ||
137 | ||
138 | /* | |
139 | * Device instance data structure | |
140 | */ | |
141 | ||
142 | typedef struct _mgslpc_info { | |
143 | void *if_ptr; /* General purpose pointer (used by SPPP) */ | |
144 | int magic; | |
145 | int flags; | |
146 | int count; /* count of opens */ | |
147 | int line; | |
148 | unsigned short close_delay; | |
149 | unsigned short closing_wait; /* time to wait before closing */ | |
150 | ||
151 | struct mgsl_icount icount; | |
152 | ||
153 | struct tty_struct *tty; | |
154 | int timeout; | |
155 | int x_char; /* xon/xoff character */ | |
156 | int blocked_open; /* # of blocked opens */ | |
157 | unsigned char read_status_mask; | |
158 | unsigned char ignore_status_mask; | |
159 | ||
160 | unsigned char *tx_buf; | |
161 | int tx_put; | |
162 | int tx_get; | |
163 | int tx_count; | |
164 | ||
165 | /* circular list of fixed length rx buffers */ | |
166 | ||
167 | unsigned char *rx_buf; /* memory allocated for all rx buffers */ | |
168 | int rx_buf_total_size; /* size of memory allocated for rx buffers */ | |
169 | int rx_put; /* index of next empty rx buffer */ | |
170 | int rx_get; /* index of next full rx buffer */ | |
171 | int rx_buf_size; /* size in bytes of single rx buffer */ | |
172 | int rx_buf_count; /* total number of rx buffers */ | |
173 | int rx_frame_count; /* number of full rx buffers */ | |
174 | ||
175 | wait_queue_head_t open_wait; | |
176 | wait_queue_head_t close_wait; | |
177 | ||
178 | wait_queue_head_t status_event_wait_q; | |
179 | wait_queue_head_t event_wait_q; | |
180 | struct timer_list tx_timer; /* HDLC transmit timeout timer */ | |
181 | struct _mgslpc_info *next_device; /* device list link */ | |
182 | ||
183 | unsigned short imra_value; | |
184 | unsigned short imrb_value; | |
185 | unsigned char pim_value; | |
186 | ||
187 | spinlock_t lock; | |
188 | struct work_struct task; /* task structure for scheduling bh */ | |
189 | ||
190 | u32 max_frame_size; | |
191 | ||
192 | u32 pending_bh; | |
193 | ||
194 | int bh_running; | |
195 | int bh_requested; | |
196 | ||
197 | int dcd_chkcount; /* check counts to prevent */ | |
198 | int cts_chkcount; /* too many IRQs if a signal */ | |
199 | int dsr_chkcount; /* is floating */ | |
200 | int ri_chkcount; | |
201 | ||
202 | int rx_enabled; | |
203 | int rx_overflow; | |
204 | ||
205 | int tx_enabled; | |
206 | int tx_active; | |
207 | int tx_aborting; | |
208 | u32 idle_mode; | |
209 | ||
210 | int if_mode; /* serial interface selection (RS-232, v.35 etc) */ | |
211 | ||
212 | char device_name[25]; /* device instance name */ | |
213 | ||
214 | unsigned int io_base; /* base I/O address of adapter */ | |
215 | unsigned int irq_level; | |
216 | ||
217 | MGSL_PARAMS params; /* communications parameters */ | |
218 | ||
219 | unsigned char serial_signals; /* current serial signal states */ | |
220 | ||
221 | char irq_occurred; /* for diagnostics use */ | |
222 | char testing_irq; | |
223 | unsigned int init_error; /* startup error (DIAGS) */ | |
224 | ||
225 | char flag_buf[MAX_ASYNC_BUFFER_SIZE]; | |
226 | BOOLEAN drop_rts_on_tx_done; | |
227 | ||
228 | struct _input_signal_events input_signal_events; | |
229 | ||
230 | /* PCMCIA support */ | |
231 | dev_link_t link; | |
232 | dev_node_t node; | |
233 | int stop; | |
234 | ||
235 | /* SPPP/Cisco HDLC device parts */ | |
236 | int netcount; | |
237 | int dosyncppp; | |
238 | spinlock_t netlock; | |
239 | ||
240 | #ifdef CONFIG_HDLC | |
241 | struct net_device *netdev; | |
242 | #endif | |
243 | ||
244 | } MGSLPC_INFO; | |
245 | ||
246 | #define MGSLPC_MAGIC 0x5402 | |
247 | ||
248 | /* | |
249 | * The size of the serial xmit buffer is 1 page, or 4096 bytes | |
250 | */ | |
251 | #define TXBUFSIZE 4096 | |
252 | ||
253 | ||
254 | #define CHA 0x00 /* channel A offset */ | |
255 | #define CHB 0x40 /* channel B offset */ | |
256 | ||
257 | /* | |
258 | * FIXME: PPC has PVR defined in asm/reg.h. For now we just undef it. | |
259 | */ | |
260 | #undef PVR | |
261 | ||
262 | #define RXFIFO 0 | |
263 | #define TXFIFO 0 | |
264 | #define STAR 0x20 | |
265 | #define CMDR 0x20 | |
266 | #define RSTA 0x21 | |
267 | #define PRE 0x21 | |
268 | #define MODE 0x22 | |
269 | #define TIMR 0x23 | |
270 | #define XAD1 0x24 | |
271 | #define XAD2 0x25 | |
272 | #define RAH1 0x26 | |
273 | #define RAH2 0x27 | |
274 | #define DAFO 0x27 | |
275 | #define RAL1 0x28 | |
276 | #define RFC 0x28 | |
277 | #define RHCR 0x29 | |
278 | #define RAL2 0x29 | |
279 | #define RBCL 0x2a | |
280 | #define XBCL 0x2a | |
281 | #define RBCH 0x2b | |
282 | #define XBCH 0x2b | |
283 | #define CCR0 0x2c | |
284 | #define CCR1 0x2d | |
285 | #define CCR2 0x2e | |
286 | #define CCR3 0x2f | |
287 | #define VSTR 0x34 | |
288 | #define BGR 0x34 | |
289 | #define RLCR 0x35 | |
290 | #define AML 0x36 | |
291 | #define AMH 0x37 | |
292 | #define GIS 0x38 | |
293 | #define IVA 0x38 | |
294 | #define IPC 0x39 | |
295 | #define ISR 0x3a | |
296 | #define IMR 0x3a | |
297 | #define PVR 0x3c | |
298 | #define PIS 0x3d | |
299 | #define PIM 0x3d | |
300 | #define PCR 0x3e | |
301 | #define CCR4 0x3f | |
302 | ||
303 | // IMR/ISR | |
304 | ||
305 | #define IRQ_BREAK_ON BIT15 // rx break detected | |
306 | #define IRQ_DATAOVERRUN BIT14 // receive data overflow | |
307 | #define IRQ_ALLSENT BIT13 // all sent | |
308 | #define IRQ_UNDERRUN BIT12 // transmit data underrun | |
309 | #define IRQ_TIMER BIT11 // timer interrupt | |
310 | #define IRQ_CTS BIT10 // CTS status change | |
311 | #define IRQ_TXREPEAT BIT9 // tx message repeat | |
312 | #define IRQ_TXFIFO BIT8 // transmit pool ready | |
313 | #define IRQ_RXEOM BIT7 // receive message end | |
314 | #define IRQ_EXITHUNT BIT6 // receive frame start | |
315 | #define IRQ_RXTIME BIT6 // rx char timeout | |
316 | #define IRQ_DCD BIT2 // carrier detect status change | |
317 | #define IRQ_OVERRUN BIT1 // receive frame overflow | |
318 | #define IRQ_RXFIFO BIT0 // receive pool full | |
319 | ||
320 | // STAR | |
321 | ||
322 | #define XFW BIT6 // transmit FIFO write enable | |
323 | #define CEC BIT2 // command executing | |
324 | #define CTS BIT1 // CTS state | |
325 | ||
326 | #define PVR_DTR BIT0 | |
327 | #define PVR_DSR BIT1 | |
328 | #define PVR_RI BIT2 | |
329 | #define PVR_AUTOCTS BIT3 | |
330 | #define PVR_RS232 0x20 /* 0010b */ | |
331 | #define PVR_V35 0xe0 /* 1110b */ | |
332 | #define PVR_RS422 0x40 /* 0100b */ | |
333 | ||
334 | /* Register access functions */ | |
335 | ||
336 | #define write_reg(info, reg, val) outb((val),(info)->io_base + (reg)) | |
337 | #define read_reg(info, reg) inb((info)->io_base + (reg)) | |
338 | ||
339 | #define read_reg16(info, reg) inw((info)->io_base + (reg)) | |
340 | #define write_reg16(info, reg, val) outw((val), (info)->io_base + (reg)) | |
341 | ||
342 | #define set_reg_bits(info, reg, mask) \ | |
343 | write_reg(info, (reg), \ | |
344 | (unsigned char) (read_reg(info, (reg)) | (mask))) | |
345 | #define clear_reg_bits(info, reg, mask) \ | |
346 | write_reg(info, (reg), \ | |
347 | (unsigned char) (read_reg(info, (reg)) & ~(mask))) | |
348 | /* | |
349 | * interrupt enable/disable routines | |
350 | */ | |
351 | static void irq_disable(MGSLPC_INFO *info, unsigned char channel, unsigned short mask) | |
352 | { | |
353 | if (channel == CHA) { | |
354 | info->imra_value |= mask; | |
355 | write_reg16(info, CHA + IMR, info->imra_value); | |
356 | } else { | |
357 | info->imrb_value |= mask; | |
358 | write_reg16(info, CHB + IMR, info->imrb_value); | |
359 | } | |
360 | } | |
361 | static void irq_enable(MGSLPC_INFO *info, unsigned char channel, unsigned short mask) | |
362 | { | |
363 | if (channel == CHA) { | |
364 | info->imra_value &= ~mask; | |
365 | write_reg16(info, CHA + IMR, info->imra_value); | |
366 | } else { | |
367 | info->imrb_value &= ~mask; | |
368 | write_reg16(info, CHB + IMR, info->imrb_value); | |
369 | } | |
370 | } | |
371 | ||
372 | #define port_irq_disable(info, mask) \ | |
373 | { info->pim_value |= (mask); write_reg(info, PIM, info->pim_value); } | |
374 | ||
375 | #define port_irq_enable(info, mask) \ | |
376 | { info->pim_value &= ~(mask); write_reg(info, PIM, info->pim_value); } | |
377 | ||
378 | static void rx_start(MGSLPC_INFO *info); | |
379 | static void rx_stop(MGSLPC_INFO *info); | |
380 | ||
381 | static void tx_start(MGSLPC_INFO *info); | |
382 | static void tx_stop(MGSLPC_INFO *info); | |
383 | static void tx_set_idle(MGSLPC_INFO *info); | |
384 | ||
385 | static void get_signals(MGSLPC_INFO *info); | |
386 | static void set_signals(MGSLPC_INFO *info); | |
387 | ||
388 | static void reset_device(MGSLPC_INFO *info); | |
389 | ||
390 | static void hdlc_mode(MGSLPC_INFO *info); | |
391 | static void async_mode(MGSLPC_INFO *info); | |
392 | ||
393 | static void tx_timeout(unsigned long context); | |
394 | ||
395 | static int ioctl_common(MGSLPC_INFO *info, unsigned int cmd, unsigned long arg); | |
396 | ||
397 | #ifdef CONFIG_HDLC | |
398 | #define dev_to_port(D) (dev_to_hdlc(D)->priv) | |
399 | static void hdlcdev_tx_done(MGSLPC_INFO *info); | |
400 | static void hdlcdev_rx(MGSLPC_INFO *info, char *buf, int size); | |
401 | static int hdlcdev_init(MGSLPC_INFO *info); | |
402 | static void hdlcdev_exit(MGSLPC_INFO *info); | |
403 | #endif | |
404 | ||
405 | static void trace_block(MGSLPC_INFO *info,const char* data, int count, int xmit); | |
406 | ||
407 | static BOOLEAN register_test(MGSLPC_INFO *info); | |
408 | static BOOLEAN irq_test(MGSLPC_INFO *info); | |
409 | static int adapter_test(MGSLPC_INFO *info); | |
410 | ||
411 | static int claim_resources(MGSLPC_INFO *info); | |
412 | static void release_resources(MGSLPC_INFO *info); | |
413 | static void mgslpc_add_device(MGSLPC_INFO *info); | |
414 | static void mgslpc_remove_device(MGSLPC_INFO *info); | |
415 | ||
416 | static int rx_get_frame(MGSLPC_INFO *info); | |
417 | static void rx_reset_buffers(MGSLPC_INFO *info); | |
418 | static int rx_alloc_buffers(MGSLPC_INFO *info); | |
419 | static void rx_free_buffers(MGSLPC_INFO *info); | |
420 | ||
421 | static irqreturn_t mgslpc_isr(int irq, void *dev_id, struct pt_regs * regs); | |
422 | ||
423 | /* | |
424 | * Bottom half interrupt handlers | |
425 | */ | |
426 | static void bh_handler(void* Context); | |
427 | static void bh_transmit(MGSLPC_INFO *info); | |
428 | static void bh_status(MGSLPC_INFO *info); | |
429 | ||
430 | /* | |
431 | * ioctl handlers | |
432 | */ | |
433 | static int tiocmget(struct tty_struct *tty, struct file *file); | |
434 | static int tiocmset(struct tty_struct *tty, struct file *file, | |
435 | unsigned int set, unsigned int clear); | |
436 | static int get_stats(MGSLPC_INFO *info, struct mgsl_icount __user *user_icount); | |
437 | static int get_params(MGSLPC_INFO *info, MGSL_PARAMS __user *user_params); | |
438 | static int set_params(MGSLPC_INFO *info, MGSL_PARAMS __user *new_params); | |
439 | static int get_txidle(MGSLPC_INFO *info, int __user *idle_mode); | |
440 | static int set_txidle(MGSLPC_INFO *info, int idle_mode); | |
441 | static int set_txenable(MGSLPC_INFO *info, int enable); | |
442 | static int tx_abort(MGSLPC_INFO *info); | |
443 | static int set_rxenable(MGSLPC_INFO *info, int enable); | |
444 | static int wait_events(MGSLPC_INFO *info, int __user *mask); | |
445 | ||
446 | static MGSLPC_INFO *mgslpc_device_list = NULL; | |
447 | static int mgslpc_device_count = 0; | |
448 | ||
449 | /* | |
450 | * Set this param to non-zero to load eax with the | |
451 | * .text section address and breakpoint on module load. | |
452 | * This is useful for use with gdb and add-symbol-file command. | |
453 | */ | |
454 | static int break_on_load=0; | |
455 | ||
456 | /* | |
457 | * Driver major number, defaults to zero to get auto | |
458 | * assigned major number. May be forced as module parameter. | |
459 | */ | |
460 | static int ttymajor=0; | |
461 | ||
462 | static int debug_level = 0; | |
463 | static int maxframe[MAX_DEVICE_COUNT] = {0,}; | |
464 | static int dosyncppp[MAX_DEVICE_COUNT] = {1,1,1,1}; | |
465 | ||
466 | module_param(break_on_load, bool, 0); | |
467 | module_param(ttymajor, int, 0); | |
468 | module_param(debug_level, int, 0); | |
469 | module_param_array(maxframe, int, NULL, 0); | |
470 | module_param_array(dosyncppp, int, NULL, 0); | |
471 | ||
472 | MODULE_LICENSE("GPL"); | |
473 | ||
474 | static char *driver_name = "SyncLink PC Card driver"; | |
a7482a2e | 475 | static char *driver_version = "$Revision: 4.34 $"; |
1da177e4 LT |
476 | |
477 | static struct tty_driver *serial_driver; | |
478 | ||
479 | /* number of characters left in xmit buffer before we ask for more */ | |
480 | #define WAKEUP_CHARS 256 | |
481 | ||
482 | static void mgslpc_change_params(MGSLPC_INFO *info); | |
483 | static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout); | |
484 | ||
485 | /* PCMCIA prototypes */ | |
486 | ||
487 | static void mgslpc_config(dev_link_t *link); | |
488 | static void mgslpc_release(u_long arg); | |
489 | static int mgslpc_event(event_t event, int priority, | |
490 | event_callback_args_t *args); | |
491 | static dev_link_t *mgslpc_attach(void); | |
492 | static void mgslpc_detach(dev_link_t *); | |
493 | ||
494 | static dev_info_t dev_info = "synclink_cs"; | |
495 | static dev_link_t *dev_list = NULL; | |
496 | ||
497 | /* | |
498 | * 1st function defined in .text section. Calling this function in | |
499 | * init_module() followed by a breakpoint allows a remote debugger | |
500 | * (gdb) to get the .text address for the add-symbol-file command. | |
501 | * This allows remote debugging of dynamically loadable modules. | |
502 | */ | |
503 | static void* mgslpc_get_text_ptr(void) | |
504 | { | |
505 | return mgslpc_get_text_ptr; | |
506 | } | |
507 | ||
508 | /** | |
509 | * line discipline callback wrappers | |
510 | * | |
511 | * The wrappers maintain line discipline references | |
512 | * while calling into the line discipline. | |
513 | * | |
514 | * ldisc_flush_buffer - flush line discipline receive buffers | |
515 | * ldisc_receive_buf - pass receive data to line discipline | |
516 | */ | |
517 | ||
518 | static void ldisc_flush_buffer(struct tty_struct *tty) | |
519 | { | |
520 | struct tty_ldisc *ld = tty_ldisc_ref(tty); | |
521 | if (ld) { | |
522 | if (ld->flush_buffer) | |
523 | ld->flush_buffer(tty); | |
524 | tty_ldisc_deref(ld); | |
525 | } | |
526 | } | |
527 | ||
528 | static void ldisc_receive_buf(struct tty_struct *tty, | |
529 | const __u8 *data, char *flags, int count) | |
530 | { | |
531 | struct tty_ldisc *ld; | |
532 | if (!tty) | |
533 | return; | |
534 | ld = tty_ldisc_ref(tty); | |
535 | if (ld) { | |
536 | if (ld->receive_buf) | |
537 | ld->receive_buf(tty, data, flags, count); | |
538 | tty_ldisc_deref(ld); | |
539 | } | |
540 | } | |
541 | ||
542 | static dev_link_t *mgslpc_attach(void) | |
543 | { | |
544 | MGSLPC_INFO *info; | |
545 | dev_link_t *link; | |
546 | client_reg_t client_reg; | |
547 | int ret; | |
548 | ||
549 | if (debug_level >= DEBUG_LEVEL_INFO) | |
550 | printk("mgslpc_attach\n"); | |
551 | ||
552 | info = (MGSLPC_INFO *)kmalloc(sizeof(MGSLPC_INFO), GFP_KERNEL); | |
553 | if (!info) { | |
554 | printk("Error can't allocate device instance data\n"); | |
555 | return NULL; | |
556 | } | |
557 | ||
558 | memset(info, 0, sizeof(MGSLPC_INFO)); | |
559 | info->magic = MGSLPC_MAGIC; | |
560 | INIT_WORK(&info->task, bh_handler, info); | |
561 | info->max_frame_size = 4096; | |
562 | info->close_delay = 5*HZ/10; | |
563 | info->closing_wait = 30*HZ; | |
564 | init_waitqueue_head(&info->open_wait); | |
565 | init_waitqueue_head(&info->close_wait); | |
566 | init_waitqueue_head(&info->status_event_wait_q); | |
567 | init_waitqueue_head(&info->event_wait_q); | |
568 | spin_lock_init(&info->lock); | |
569 | spin_lock_init(&info->netlock); | |
570 | memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS)); | |
571 | info->idle_mode = HDLC_TXIDLE_FLAGS; | |
572 | info->imra_value = 0xffff; | |
573 | info->imrb_value = 0xffff; | |
574 | info->pim_value = 0xff; | |
575 | ||
576 | link = &info->link; | |
577 | link->priv = info; | |
578 | ||
579 | /* Initialize the dev_link_t structure */ | |
580 | ||
581 | /* Interrupt setup */ | |
582 | link->irq.Attributes = IRQ_TYPE_EXCLUSIVE; | |
0c7ab676 | 583 | link->irq.IRQInfo1 = IRQ_LEVEL_ID; |
1da177e4 LT |
584 | link->irq.Handler = NULL; |
585 | ||
586 | link->conf.Attributes = 0; | |
587 | link->conf.Vcc = 50; | |
588 | link->conf.IntType = INT_MEMORY_AND_IO; | |
589 | ||
590 | /* Register with Card Services */ | |
591 | link->next = dev_list; | |
592 | dev_list = link; | |
593 | ||
594 | client_reg.dev_info = &dev_info; | |
1da177e4 LT |
595 | client_reg.Version = 0x0210; |
596 | client_reg.event_callback_args.client_data = link; | |
597 | ||
598 | ret = pcmcia_register_client(&link->handle, &client_reg); | |
599 | if (ret != CS_SUCCESS) { | |
600 | cs_error(link->handle, RegisterClient, ret); | |
601 | mgslpc_detach(link); | |
602 | return NULL; | |
603 | } | |
604 | ||
605 | mgslpc_add_device(info); | |
606 | ||
607 | return link; | |
608 | } | |
609 | ||
610 | /* Card has been inserted. | |
611 | */ | |
612 | ||
613 | #define CS_CHECK(fn, ret) \ | |
614 | do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0) | |
615 | ||
616 | static void mgslpc_config(dev_link_t *link) | |
617 | { | |
618 | client_handle_t handle = link->handle; | |
619 | MGSLPC_INFO *info = link->priv; | |
620 | tuple_t tuple; | |
621 | cisparse_t parse; | |
622 | int last_fn, last_ret; | |
623 | u_char buf[64]; | |
624 | config_info_t conf; | |
625 | cistpl_cftable_entry_t dflt = { 0 }; | |
626 | cistpl_cftable_entry_t *cfg; | |
627 | ||
628 | if (debug_level >= DEBUG_LEVEL_INFO) | |
629 | printk("mgslpc_config(0x%p)\n", link); | |
630 | ||
631 | /* read CONFIG tuple to find its configuration registers */ | |
632 | tuple.DesiredTuple = CISTPL_CONFIG; | |
633 | tuple.Attributes = 0; | |
634 | tuple.TupleData = buf; | |
635 | tuple.TupleDataMax = sizeof(buf); | |
636 | tuple.TupleOffset = 0; | |
637 | CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple)); | |
638 | CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple)); | |
639 | CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse)); | |
640 | link->conf.ConfigBase = parse.config.base; | |
641 | link->conf.Present = parse.config.rmask[0]; | |
642 | ||
643 | /* Configure card */ | |
644 | link->state |= DEV_CONFIG; | |
645 | ||
646 | /* Look up the current Vcc */ | |
647 | CS_CHECK(GetConfigurationInfo, pcmcia_get_configuration_info(handle, &conf)); | |
648 | link->conf.Vcc = conf.Vcc; | |
649 | ||
650 | /* get CIS configuration entry */ | |
651 | ||
652 | tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY; | |
653 | CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple)); | |
654 | ||
655 | cfg = &(parse.cftable_entry); | |
656 | CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple)); | |
657 | CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse)); | |
658 | ||
659 | if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg; | |
660 | if (cfg->index == 0) | |
661 | goto cs_failed; | |
662 | ||
663 | link->conf.ConfigIndex = cfg->index; | |
664 | link->conf.Attributes |= CONF_ENABLE_IRQ; | |
665 | ||
666 | /* IO window settings */ | |
667 | link->io.NumPorts1 = 0; | |
668 | if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) { | |
669 | cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io; | |
670 | link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO; | |
671 | if (!(io->flags & CISTPL_IO_8BIT)) | |
672 | link->io.Attributes1 = IO_DATA_PATH_WIDTH_16; | |
673 | if (!(io->flags & CISTPL_IO_16BIT)) | |
674 | link->io.Attributes1 = IO_DATA_PATH_WIDTH_8; | |
675 | link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK; | |
676 | link->io.BasePort1 = io->win[0].base; | |
677 | link->io.NumPorts1 = io->win[0].len; | |
678 | CS_CHECK(RequestIO, pcmcia_request_io(link->handle, &link->io)); | |
679 | } | |
680 | ||
681 | link->conf.Attributes = CONF_ENABLE_IRQ; | |
682 | link->conf.Vcc = 50; | |
683 | link->conf.IntType = INT_MEMORY_AND_IO; | |
684 | link->conf.ConfigIndex = 8; | |
685 | link->conf.Present = PRESENT_OPTION; | |
686 | ||
687 | link->irq.Attributes |= IRQ_HANDLE_PRESENT; | |
688 | link->irq.Handler = mgslpc_isr; | |
689 | link->irq.Instance = info; | |
690 | CS_CHECK(RequestIRQ, pcmcia_request_irq(link->handle, &link->irq)); | |
691 | ||
692 | CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link->handle, &link->conf)); | |
693 | ||
694 | info->io_base = link->io.BasePort1; | |
695 | info->irq_level = link->irq.AssignedIRQ; | |
696 | ||
697 | /* add to linked list of devices */ | |
698 | sprintf(info->node.dev_name, "mgslpc0"); | |
699 | info->node.major = info->node.minor = 0; | |
700 | link->dev = &info->node; | |
701 | ||
702 | printk(KERN_INFO "%s: index 0x%02x:", | |
703 | info->node.dev_name, link->conf.ConfigIndex); | |
704 | if (link->conf.Attributes & CONF_ENABLE_IRQ) | |
705 | printk(", irq %d", link->irq.AssignedIRQ); | |
706 | if (link->io.NumPorts1) | |
707 | printk(", io 0x%04x-0x%04x", link->io.BasePort1, | |
708 | link->io.BasePort1+link->io.NumPorts1-1); | |
709 | printk("\n"); | |
710 | ||
711 | link->state &= ~DEV_CONFIG_PENDING; | |
712 | return; | |
713 | ||
714 | cs_failed: | |
715 | cs_error(link->handle, last_fn, last_ret); | |
716 | mgslpc_release((u_long)link); | |
717 | } | |
718 | ||
719 | /* Card has been removed. | |
720 | * Unregister device and release PCMCIA configuration. | |
721 | * If device is open, postpone until it is closed. | |
722 | */ | |
723 | static void mgslpc_release(u_long arg) | |
724 | { | |
725 | dev_link_t *link = (dev_link_t *)arg; | |
726 | ||
727 | if (debug_level >= DEBUG_LEVEL_INFO) | |
728 | printk("mgslpc_release(0x%p)\n", link); | |
729 | ||
730 | /* Unlink the device chain */ | |
731 | link->dev = NULL; | |
732 | link->state &= ~DEV_CONFIG; | |
733 | ||
734 | pcmcia_release_configuration(link->handle); | |
735 | if (link->io.NumPorts1) | |
736 | pcmcia_release_io(link->handle, &link->io); | |
737 | if (link->irq.AssignedIRQ) | |
738 | pcmcia_release_irq(link->handle, &link->irq); | |
739 | if (link->state & DEV_STALE_LINK) | |
740 | mgslpc_detach(link); | |
741 | } | |
742 | ||
743 | static void mgslpc_detach(dev_link_t *link) | |
744 | { | |
745 | dev_link_t **linkp; | |
746 | ||
747 | if (debug_level >= DEBUG_LEVEL_INFO) | |
748 | printk("mgslpc_detach(0x%p)\n", link); | |
749 | ||
750 | /* find device */ | |
751 | for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next) | |
752 | if (*linkp == link) break; | |
753 | if (*linkp == NULL) | |
754 | return; | |
755 | ||
756 | if (link->state & DEV_CONFIG) { | |
757 | /* device is configured/active, mark it so when | |
758 | * release() is called a proper detach() occurs. | |
759 | */ | |
760 | if (debug_level >= DEBUG_LEVEL_INFO) | |
761 | printk(KERN_DEBUG "synclinkpc: detach postponed, '%s' " | |
762 | "still locked\n", link->dev->dev_name); | |
763 | link->state |= DEV_STALE_LINK; | |
764 | return; | |
765 | } | |
766 | ||
767 | /* Break the link with Card Services */ | |
768 | if (link->handle) | |
769 | pcmcia_deregister_client(link->handle); | |
770 | ||
771 | /* Unlink device structure, and free it */ | |
772 | *linkp = link->next; | |
773 | mgslpc_remove_device((MGSLPC_INFO *)link->priv); | |
774 | } | |
775 | ||
776 | static int mgslpc_event(event_t event, int priority, | |
777 | event_callback_args_t *args) | |
778 | { | |
779 | dev_link_t *link = args->client_data; | |
780 | MGSLPC_INFO *info = link->priv; | |
781 | ||
782 | if (debug_level >= DEBUG_LEVEL_INFO) | |
783 | printk("mgslpc_event(0x%06x)\n", event); | |
784 | ||
785 | switch (event) { | |
786 | case CS_EVENT_CARD_REMOVAL: | |
787 | link->state &= ~DEV_PRESENT; | |
788 | if (link->state & DEV_CONFIG) { | |
789 | ((MGSLPC_INFO *)link->priv)->stop = 1; | |
790 | mgslpc_release((u_long)link); | |
791 | } | |
792 | break; | |
793 | case CS_EVENT_CARD_INSERTION: | |
794 | link->state |= DEV_PRESENT | DEV_CONFIG_PENDING; | |
795 | mgslpc_config(link); | |
796 | break; | |
797 | case CS_EVENT_PM_SUSPEND: | |
798 | link->state |= DEV_SUSPEND; | |
799 | /* Fall through... */ | |
800 | case CS_EVENT_RESET_PHYSICAL: | |
801 | /* Mark the device as stopped, to block IO until later */ | |
802 | info->stop = 1; | |
803 | if (link->state & DEV_CONFIG) | |
804 | pcmcia_release_configuration(link->handle); | |
805 | break; | |
806 | case CS_EVENT_PM_RESUME: | |
807 | link->state &= ~DEV_SUSPEND; | |
808 | /* Fall through... */ | |
809 | case CS_EVENT_CARD_RESET: | |
810 | if (link->state & DEV_CONFIG) | |
811 | pcmcia_request_configuration(link->handle, &link->conf); | |
812 | info->stop = 0; | |
813 | break; | |
814 | } | |
815 | return 0; | |
816 | } | |
817 | ||
818 | static inline int mgslpc_paranoia_check(MGSLPC_INFO *info, | |
819 | char *name, const char *routine) | |
820 | { | |
821 | #ifdef MGSLPC_PARANOIA_CHECK | |
822 | static const char *badmagic = | |
823 | "Warning: bad magic number for mgsl struct (%s) in %s\n"; | |
824 | static const char *badinfo = | |
825 | "Warning: null mgslpc_info for (%s) in %s\n"; | |
826 | ||
827 | if (!info) { | |
828 | printk(badinfo, name, routine); | |
829 | return 1; | |
830 | } | |
831 | if (info->magic != MGSLPC_MAGIC) { | |
832 | printk(badmagic, name, routine); | |
833 | return 1; | |
834 | } | |
835 | #else | |
836 | if (!info) | |
837 | return 1; | |
838 | #endif | |
839 | return 0; | |
840 | } | |
841 | ||
842 | ||
843 | #define CMD_RXFIFO BIT7 // release current rx FIFO | |
844 | #define CMD_RXRESET BIT6 // receiver reset | |
845 | #define CMD_RXFIFO_READ BIT5 | |
846 | #define CMD_START_TIMER BIT4 | |
847 | #define CMD_TXFIFO BIT3 // release current tx FIFO | |
848 | #define CMD_TXEOM BIT1 // transmit end message | |
849 | #define CMD_TXRESET BIT0 // transmit reset | |
850 | ||
851 | static BOOLEAN wait_command_complete(MGSLPC_INFO *info, unsigned char channel) | |
852 | { | |
853 | int i = 0; | |
854 | /* wait for command completion */ | |
855 | while (read_reg(info, (unsigned char)(channel+STAR)) & BIT2) { | |
856 | udelay(1); | |
857 | if (i++ == 1000) | |
858 | return FALSE; | |
859 | } | |
860 | return TRUE; | |
861 | } | |
862 | ||
863 | static void issue_command(MGSLPC_INFO *info, unsigned char channel, unsigned char cmd) | |
864 | { | |
865 | wait_command_complete(info, channel); | |
866 | write_reg(info, (unsigned char) (channel + CMDR), cmd); | |
867 | } | |
868 | ||
869 | static void tx_pause(struct tty_struct *tty) | |
870 | { | |
871 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
872 | unsigned long flags; | |
873 | ||
874 | if (mgslpc_paranoia_check(info, tty->name, "tx_pause")) | |
875 | return; | |
876 | if (debug_level >= DEBUG_LEVEL_INFO) | |
877 | printk("tx_pause(%s)\n",info->device_name); | |
878 | ||
879 | spin_lock_irqsave(&info->lock,flags); | |
880 | if (info->tx_enabled) | |
881 | tx_stop(info); | |
882 | spin_unlock_irqrestore(&info->lock,flags); | |
883 | } | |
884 | ||
885 | static void tx_release(struct tty_struct *tty) | |
886 | { | |
887 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
888 | unsigned long flags; | |
889 | ||
890 | if (mgslpc_paranoia_check(info, tty->name, "tx_release")) | |
891 | return; | |
892 | if (debug_level >= DEBUG_LEVEL_INFO) | |
893 | printk("tx_release(%s)\n",info->device_name); | |
894 | ||
895 | spin_lock_irqsave(&info->lock,flags); | |
896 | if (!info->tx_enabled) | |
897 | tx_start(info); | |
898 | spin_unlock_irqrestore(&info->lock,flags); | |
899 | } | |
900 | ||
901 | /* Return next bottom half action to perform. | |
902 | * or 0 if nothing to do. | |
903 | */ | |
904 | static int bh_action(MGSLPC_INFO *info) | |
905 | { | |
906 | unsigned long flags; | |
907 | int rc = 0; | |
908 | ||
909 | spin_lock_irqsave(&info->lock,flags); | |
910 | ||
911 | if (info->pending_bh & BH_RECEIVE) { | |
912 | info->pending_bh &= ~BH_RECEIVE; | |
913 | rc = BH_RECEIVE; | |
914 | } else if (info->pending_bh & BH_TRANSMIT) { | |
915 | info->pending_bh &= ~BH_TRANSMIT; | |
916 | rc = BH_TRANSMIT; | |
917 | } else if (info->pending_bh & BH_STATUS) { | |
918 | info->pending_bh &= ~BH_STATUS; | |
919 | rc = BH_STATUS; | |
920 | } | |
921 | ||
922 | if (!rc) { | |
923 | /* Mark BH routine as complete */ | |
924 | info->bh_running = 0; | |
925 | info->bh_requested = 0; | |
926 | } | |
927 | ||
928 | spin_unlock_irqrestore(&info->lock,flags); | |
929 | ||
930 | return rc; | |
931 | } | |
932 | ||
933 | void bh_handler(void* Context) | |
934 | { | |
935 | MGSLPC_INFO *info = (MGSLPC_INFO*)Context; | |
936 | int action; | |
937 | ||
938 | if (!info) | |
939 | return; | |
940 | ||
941 | if (debug_level >= DEBUG_LEVEL_BH) | |
942 | printk( "%s(%d):bh_handler(%s) entry\n", | |
943 | __FILE__,__LINE__,info->device_name); | |
944 | ||
945 | info->bh_running = 1; | |
946 | ||
947 | while((action = bh_action(info)) != 0) { | |
948 | ||
949 | /* Process work item */ | |
950 | if ( debug_level >= DEBUG_LEVEL_BH ) | |
951 | printk( "%s(%d):bh_handler() work item action=%d\n", | |
952 | __FILE__,__LINE__,action); | |
953 | ||
954 | switch (action) { | |
955 | ||
956 | case BH_RECEIVE: | |
957 | while(rx_get_frame(info)); | |
958 | break; | |
959 | case BH_TRANSMIT: | |
960 | bh_transmit(info); | |
961 | break; | |
962 | case BH_STATUS: | |
963 | bh_status(info); | |
964 | break; | |
965 | default: | |
966 | /* unknown work item ID */ | |
967 | printk("Unknown work item ID=%08X!\n", action); | |
968 | break; | |
969 | } | |
970 | } | |
971 | ||
972 | if (debug_level >= DEBUG_LEVEL_BH) | |
973 | printk( "%s(%d):bh_handler(%s) exit\n", | |
974 | __FILE__,__LINE__,info->device_name); | |
975 | } | |
976 | ||
977 | void bh_transmit(MGSLPC_INFO *info) | |
978 | { | |
979 | struct tty_struct *tty = info->tty; | |
980 | if (debug_level >= DEBUG_LEVEL_BH) | |
981 | printk("bh_transmit() entry on %s\n", info->device_name); | |
982 | ||
983 | if (tty) { | |
984 | tty_wakeup(tty); | |
985 | wake_up_interruptible(&tty->write_wait); | |
986 | } | |
987 | } | |
988 | ||
989 | void bh_status(MGSLPC_INFO *info) | |
990 | { | |
991 | info->ri_chkcount = 0; | |
992 | info->dsr_chkcount = 0; | |
993 | info->dcd_chkcount = 0; | |
994 | info->cts_chkcount = 0; | |
995 | } | |
996 | ||
997 | /* eom: non-zero = end of frame */ | |
998 | static void rx_ready_hdlc(MGSLPC_INFO *info, int eom) | |
999 | { | |
1000 | unsigned char data[2]; | |
1001 | unsigned char fifo_count, read_count, i; | |
1002 | RXBUF *buf = (RXBUF*)(info->rx_buf + (info->rx_put * info->rx_buf_size)); | |
1003 | ||
1004 | if (debug_level >= DEBUG_LEVEL_ISR) | |
1005 | printk("%s(%d):rx_ready_hdlc(eom=%d)\n",__FILE__,__LINE__,eom); | |
1006 | ||
1007 | if (!info->rx_enabled) | |
1008 | return; | |
1009 | ||
1010 | if (info->rx_frame_count >= info->rx_buf_count) { | |
1011 | /* no more free buffers */ | |
1012 | issue_command(info, CHA, CMD_RXRESET); | |
1013 | info->pending_bh |= BH_RECEIVE; | |
1014 | info->rx_overflow = 1; | |
1015 | info->icount.buf_overrun++; | |
1016 | return; | |
1017 | } | |
1018 | ||
1019 | if (eom) { | |
1020 | /* end of frame, get FIFO count from RBCL register */ | |
1021 | if (!(fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f))) | |
1022 | fifo_count = 32; | |
1023 | } else | |
1024 | fifo_count = 32; | |
1025 | ||
1026 | do { | |
1027 | if (fifo_count == 1) { | |
1028 | read_count = 1; | |
1029 | data[0] = read_reg(info, CHA + RXFIFO); | |
1030 | } else { | |
1031 | read_count = 2; | |
1032 | *((unsigned short *) data) = read_reg16(info, CHA + RXFIFO); | |
1033 | } | |
1034 | fifo_count -= read_count; | |
1035 | if (!fifo_count && eom) | |
1036 | buf->status = data[--read_count]; | |
1037 | ||
1038 | for (i = 0; i < read_count; i++) { | |
1039 | if (buf->count >= info->max_frame_size) { | |
1040 | /* frame too large, reset receiver and reset current buffer */ | |
1041 | issue_command(info, CHA, CMD_RXRESET); | |
1042 | buf->count = 0; | |
1043 | return; | |
1044 | } | |
1045 | *(buf->data + buf->count) = data[i]; | |
1046 | buf->count++; | |
1047 | } | |
1048 | } while (fifo_count); | |
1049 | ||
1050 | if (eom) { | |
1051 | info->pending_bh |= BH_RECEIVE; | |
1052 | info->rx_frame_count++; | |
1053 | info->rx_put++; | |
1054 | if (info->rx_put >= info->rx_buf_count) | |
1055 | info->rx_put = 0; | |
1056 | } | |
1057 | issue_command(info, CHA, CMD_RXFIFO); | |
1058 | } | |
1059 | ||
1060 | static void rx_ready_async(MGSLPC_INFO *info, int tcd) | |
1061 | { | |
1062 | unsigned char data, status; | |
1063 | int fifo_count; | |
1064 | struct tty_struct *tty = info->tty; | |
1065 | struct mgsl_icount *icount = &info->icount; | |
1066 | ||
1067 | if (tcd) { | |
1068 | /* early termination, get FIFO count from RBCL register */ | |
1069 | fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f); | |
1070 | ||
1071 | /* Zero fifo count could mean 0 or 32 bytes available. | |
1072 | * If BIT5 of STAR is set then at least 1 byte is available. | |
1073 | */ | |
1074 | if (!fifo_count && (read_reg(info,CHA+STAR) & BIT5)) | |
1075 | fifo_count = 32; | |
1076 | } else | |
1077 | fifo_count = 32; | |
1078 | ||
1079 | /* Flush received async data to receive data buffer. */ | |
1080 | while (fifo_count) { | |
1081 | data = read_reg(info, CHA + RXFIFO); | |
1082 | status = read_reg(info, CHA + RXFIFO); | |
1083 | fifo_count -= 2; | |
1084 | ||
1085 | if (tty->flip.count >= TTY_FLIPBUF_SIZE) | |
1086 | break; | |
1087 | ||
1088 | *tty->flip.char_buf_ptr = data; | |
1089 | icount->rx++; | |
1090 | ||
1091 | *tty->flip.flag_buf_ptr = 0; | |
1092 | ||
1093 | // if no frameing/crc error then save data | |
1094 | // BIT7:parity error | |
1095 | // BIT6:framing error | |
1096 | ||
1097 | if (status & (BIT7 + BIT6)) { | |
1098 | if (status & BIT7) | |
1099 | icount->parity++; | |
1100 | else | |
1101 | icount->frame++; | |
1102 | ||
1103 | /* discard char if tty control flags say so */ | |
1104 | if (status & info->ignore_status_mask) | |
1105 | continue; | |
1106 | ||
1107 | status &= info->read_status_mask; | |
1108 | ||
1109 | if (status & BIT7) | |
1110 | *tty->flip.flag_buf_ptr = TTY_PARITY; | |
1111 | else if (status & BIT6) | |
1112 | *tty->flip.flag_buf_ptr = TTY_FRAME; | |
1113 | } | |
1114 | ||
1115 | tty->flip.flag_buf_ptr++; | |
1116 | tty->flip.char_buf_ptr++; | |
1117 | tty->flip.count++; | |
1118 | } | |
1119 | issue_command(info, CHA, CMD_RXFIFO); | |
1120 | ||
1121 | if (debug_level >= DEBUG_LEVEL_ISR) { | |
1122 | printk("%s(%d):rx_ready_async count=%d\n", | |
1123 | __FILE__,__LINE__,tty->flip.count); | |
1124 | printk("%s(%d):rx=%d brk=%d parity=%d frame=%d overrun=%d\n", | |
1125 | __FILE__,__LINE__,icount->rx,icount->brk, | |
1126 | icount->parity,icount->frame,icount->overrun); | |
1127 | } | |
1128 | ||
1129 | if (tty->flip.count) | |
1130 | tty_flip_buffer_push(tty); | |
1131 | } | |
1132 | ||
1133 | ||
1134 | static void tx_done(MGSLPC_INFO *info) | |
1135 | { | |
1136 | if (!info->tx_active) | |
1137 | return; | |
1138 | ||
1139 | info->tx_active = 0; | |
1140 | info->tx_aborting = 0; | |
1141 | ||
1142 | if (info->params.mode == MGSL_MODE_ASYNC) | |
1143 | return; | |
1144 | ||
1145 | info->tx_count = info->tx_put = info->tx_get = 0; | |
1146 | del_timer(&info->tx_timer); | |
1147 | ||
1148 | if (info->drop_rts_on_tx_done) { | |
1149 | get_signals(info); | |
1150 | if (info->serial_signals & SerialSignal_RTS) { | |
1151 | info->serial_signals &= ~SerialSignal_RTS; | |
1152 | set_signals(info); | |
1153 | } | |
1154 | info->drop_rts_on_tx_done = 0; | |
1155 | } | |
1156 | ||
1157 | #ifdef CONFIG_HDLC | |
1158 | if (info->netcount) | |
1159 | hdlcdev_tx_done(info); | |
1160 | else | |
1161 | #endif | |
1162 | { | |
1163 | if (info->tty->stopped || info->tty->hw_stopped) { | |
1164 | tx_stop(info); | |
1165 | return; | |
1166 | } | |
1167 | info->pending_bh |= BH_TRANSMIT; | |
1168 | } | |
1169 | } | |
1170 | ||
1171 | static void tx_ready(MGSLPC_INFO *info) | |
1172 | { | |
1173 | unsigned char fifo_count = 32; | |
1174 | int c; | |
1175 | ||
1176 | if (debug_level >= DEBUG_LEVEL_ISR) | |
1177 | printk("%s(%d):tx_ready(%s)\n", __FILE__,__LINE__,info->device_name); | |
1178 | ||
1179 | if (info->params.mode == MGSL_MODE_HDLC) { | |
1180 | if (!info->tx_active) | |
1181 | return; | |
1182 | } else { | |
1183 | if (info->tty->stopped || info->tty->hw_stopped) { | |
1184 | tx_stop(info); | |
1185 | return; | |
1186 | } | |
1187 | if (!info->tx_count) | |
1188 | info->tx_active = 0; | |
1189 | } | |
1190 | ||
1191 | if (!info->tx_count) | |
1192 | return; | |
1193 | ||
1194 | while (info->tx_count && fifo_count) { | |
1195 | c = min(2, min_t(int, fifo_count, min(info->tx_count, TXBUFSIZE - info->tx_get))); | |
1196 | ||
1197 | if (c == 1) { | |
1198 | write_reg(info, CHA + TXFIFO, *(info->tx_buf + info->tx_get)); | |
1199 | } else { | |
1200 | write_reg16(info, CHA + TXFIFO, | |
1201 | *((unsigned short*)(info->tx_buf + info->tx_get))); | |
1202 | } | |
1203 | info->tx_count -= c; | |
1204 | info->tx_get = (info->tx_get + c) & (TXBUFSIZE - 1); | |
1205 | fifo_count -= c; | |
1206 | } | |
1207 | ||
1208 | if (info->params.mode == MGSL_MODE_ASYNC) { | |
1209 | if (info->tx_count < WAKEUP_CHARS) | |
1210 | info->pending_bh |= BH_TRANSMIT; | |
1211 | issue_command(info, CHA, CMD_TXFIFO); | |
1212 | } else { | |
1213 | if (info->tx_count) | |
1214 | issue_command(info, CHA, CMD_TXFIFO); | |
1215 | else | |
1216 | issue_command(info, CHA, CMD_TXFIFO + CMD_TXEOM); | |
1217 | } | |
1218 | } | |
1219 | ||
1220 | static void cts_change(MGSLPC_INFO *info) | |
1221 | { | |
1222 | get_signals(info); | |
1223 | if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) | |
1224 | irq_disable(info, CHB, IRQ_CTS); | |
1225 | info->icount.cts++; | |
1226 | if (info->serial_signals & SerialSignal_CTS) | |
1227 | info->input_signal_events.cts_up++; | |
1228 | else | |
1229 | info->input_signal_events.cts_down++; | |
1230 | wake_up_interruptible(&info->status_event_wait_q); | |
1231 | wake_up_interruptible(&info->event_wait_q); | |
1232 | ||
1233 | if (info->flags & ASYNC_CTS_FLOW) { | |
1234 | if (info->tty->hw_stopped) { | |
1235 | if (info->serial_signals & SerialSignal_CTS) { | |
1236 | if (debug_level >= DEBUG_LEVEL_ISR) | |
1237 | printk("CTS tx start..."); | |
1238 | if (info->tty) | |
1239 | info->tty->hw_stopped = 0; | |
1240 | tx_start(info); | |
1241 | info->pending_bh |= BH_TRANSMIT; | |
1242 | return; | |
1243 | } | |
1244 | } else { | |
1245 | if (!(info->serial_signals & SerialSignal_CTS)) { | |
1246 | if (debug_level >= DEBUG_LEVEL_ISR) | |
1247 | printk("CTS tx stop..."); | |
1248 | if (info->tty) | |
1249 | info->tty->hw_stopped = 1; | |
1250 | tx_stop(info); | |
1251 | } | |
1252 | } | |
1253 | } | |
1254 | info->pending_bh |= BH_STATUS; | |
1255 | } | |
1256 | ||
1257 | static void dcd_change(MGSLPC_INFO *info) | |
1258 | { | |
1259 | get_signals(info); | |
1260 | if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) | |
1261 | irq_disable(info, CHB, IRQ_DCD); | |
1262 | info->icount.dcd++; | |
1263 | if (info->serial_signals & SerialSignal_DCD) { | |
1264 | info->input_signal_events.dcd_up++; | |
1265 | } | |
1266 | else | |
1267 | info->input_signal_events.dcd_down++; | |
1268 | #ifdef CONFIG_HDLC | |
1269 | if (info->netcount) | |
1270 | hdlc_set_carrier(info->serial_signals & SerialSignal_DCD, info->netdev); | |
1271 | #endif | |
1272 | wake_up_interruptible(&info->status_event_wait_q); | |
1273 | wake_up_interruptible(&info->event_wait_q); | |
1274 | ||
1275 | if (info->flags & ASYNC_CHECK_CD) { | |
1276 | if (debug_level >= DEBUG_LEVEL_ISR) | |
1277 | printk("%s CD now %s...", info->device_name, | |
1278 | (info->serial_signals & SerialSignal_DCD) ? "on" : "off"); | |
1279 | if (info->serial_signals & SerialSignal_DCD) | |
1280 | wake_up_interruptible(&info->open_wait); | |
1281 | else { | |
1282 | if (debug_level >= DEBUG_LEVEL_ISR) | |
1283 | printk("doing serial hangup..."); | |
1284 | if (info->tty) | |
1285 | tty_hangup(info->tty); | |
1286 | } | |
1287 | } | |
1288 | info->pending_bh |= BH_STATUS; | |
1289 | } | |
1290 | ||
1291 | static void dsr_change(MGSLPC_INFO *info) | |
1292 | { | |
1293 | get_signals(info); | |
1294 | if ((info->dsr_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) | |
1295 | port_irq_disable(info, PVR_DSR); | |
1296 | info->icount.dsr++; | |
1297 | if (info->serial_signals & SerialSignal_DSR) | |
1298 | info->input_signal_events.dsr_up++; | |
1299 | else | |
1300 | info->input_signal_events.dsr_down++; | |
1301 | wake_up_interruptible(&info->status_event_wait_q); | |
1302 | wake_up_interruptible(&info->event_wait_q); | |
1303 | info->pending_bh |= BH_STATUS; | |
1304 | } | |
1305 | ||
1306 | static void ri_change(MGSLPC_INFO *info) | |
1307 | { | |
1308 | get_signals(info); | |
1309 | if ((info->ri_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) | |
1310 | port_irq_disable(info, PVR_RI); | |
1311 | info->icount.rng++; | |
1312 | if (info->serial_signals & SerialSignal_RI) | |
1313 | info->input_signal_events.ri_up++; | |
1314 | else | |
1315 | info->input_signal_events.ri_down++; | |
1316 | wake_up_interruptible(&info->status_event_wait_q); | |
1317 | wake_up_interruptible(&info->event_wait_q); | |
1318 | info->pending_bh |= BH_STATUS; | |
1319 | } | |
1320 | ||
1321 | /* Interrupt service routine entry point. | |
1322 | * | |
1323 | * Arguments: | |
1324 | * | |
1325 | * irq interrupt number that caused interrupt | |
1326 | * dev_id device ID supplied during interrupt registration | |
1327 | * regs interrupted processor context | |
1328 | */ | |
1329 | static irqreturn_t mgslpc_isr(int irq, void *dev_id, struct pt_regs * regs) | |
1330 | { | |
1331 | MGSLPC_INFO * info = (MGSLPC_INFO *)dev_id; | |
1332 | unsigned short isr; | |
1333 | unsigned char gis, pis; | |
1334 | int count=0; | |
1335 | ||
1336 | if (debug_level >= DEBUG_LEVEL_ISR) | |
1337 | printk("mgslpc_isr(%d) entry.\n", irq); | |
1338 | if (!info) | |
1339 | return IRQ_NONE; | |
1340 | ||
1341 | if (!(info->link.state & DEV_CONFIG)) | |
1342 | return IRQ_HANDLED; | |
1343 | ||
1344 | spin_lock(&info->lock); | |
1345 | ||
1346 | while ((gis = read_reg(info, CHA + GIS))) { | |
1347 | if (debug_level >= DEBUG_LEVEL_ISR) | |
1348 | printk("mgslpc_isr %s gis=%04X\n", info->device_name,gis); | |
1349 | ||
1350 | if ((gis & 0x70) || count > 1000) { | |
1351 | printk("synclink_cs:hardware failed or ejected\n"); | |
1352 | break; | |
1353 | } | |
1354 | count++; | |
1355 | ||
1356 | if (gis & (BIT1 + BIT0)) { | |
1357 | isr = read_reg16(info, CHB + ISR); | |
1358 | if (isr & IRQ_DCD) | |
1359 | dcd_change(info); | |
1360 | if (isr & IRQ_CTS) | |
1361 | cts_change(info); | |
1362 | } | |
1363 | if (gis & (BIT3 + BIT2)) | |
1364 | { | |
1365 | isr = read_reg16(info, CHA + ISR); | |
1366 | if (isr & IRQ_TIMER) { | |
1367 | info->irq_occurred = 1; | |
1368 | irq_disable(info, CHA, IRQ_TIMER); | |
1369 | } | |
1370 | ||
1371 | /* receive IRQs */ | |
1372 | if (isr & IRQ_EXITHUNT) { | |
1373 | info->icount.exithunt++; | |
1374 | wake_up_interruptible(&info->event_wait_q); | |
1375 | } | |
1376 | if (isr & IRQ_BREAK_ON) { | |
1377 | info->icount.brk++; | |
1378 | if (info->flags & ASYNC_SAK) | |
1379 | do_SAK(info->tty); | |
1380 | } | |
1381 | if (isr & IRQ_RXTIME) { | |
1382 | issue_command(info, CHA, CMD_RXFIFO_READ); | |
1383 | } | |
1384 | if (isr & (IRQ_RXEOM + IRQ_RXFIFO)) { | |
1385 | if (info->params.mode == MGSL_MODE_HDLC) | |
1386 | rx_ready_hdlc(info, isr & IRQ_RXEOM); | |
1387 | else | |
1388 | rx_ready_async(info, isr & IRQ_RXEOM); | |
1389 | } | |
1390 | ||
1391 | /* transmit IRQs */ | |
1392 | if (isr & IRQ_UNDERRUN) { | |
1393 | if (info->tx_aborting) | |
1394 | info->icount.txabort++; | |
1395 | else | |
1396 | info->icount.txunder++; | |
1397 | tx_done(info); | |
1398 | } | |
1399 | else if (isr & IRQ_ALLSENT) { | |
1400 | info->icount.txok++; | |
1401 | tx_done(info); | |
1402 | } | |
1403 | else if (isr & IRQ_TXFIFO) | |
1404 | tx_ready(info); | |
1405 | } | |
1406 | if (gis & BIT7) { | |
1407 | pis = read_reg(info, CHA + PIS); | |
1408 | if (pis & BIT1) | |
1409 | dsr_change(info); | |
1410 | if (pis & BIT2) | |
1411 | ri_change(info); | |
1412 | } | |
1413 | } | |
1414 | ||
1415 | /* Request bottom half processing if there's something | |
1416 | * for it to do and the bh is not already running | |
1417 | */ | |
1418 | ||
1419 | if (info->pending_bh && !info->bh_running && !info->bh_requested) { | |
1420 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
1421 | printk("%s(%d):%s queueing bh task.\n", | |
1422 | __FILE__,__LINE__,info->device_name); | |
1423 | schedule_work(&info->task); | |
1424 | info->bh_requested = 1; | |
1425 | } | |
1426 | ||
1427 | spin_unlock(&info->lock); | |
1428 | ||
1429 | if (debug_level >= DEBUG_LEVEL_ISR) | |
1430 | printk("%s(%d):mgslpc_isr(%d)exit.\n", | |
1431 | __FILE__,__LINE__,irq); | |
1432 | ||
1433 | return IRQ_HANDLED; | |
1434 | } | |
1435 | ||
1436 | /* Initialize and start device. | |
1437 | */ | |
1438 | static int startup(MGSLPC_INFO * info) | |
1439 | { | |
1440 | int retval = 0; | |
1441 | ||
1442 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1443 | printk("%s(%d):startup(%s)\n",__FILE__,__LINE__,info->device_name); | |
1444 | ||
1445 | if (info->flags & ASYNC_INITIALIZED) | |
1446 | return 0; | |
1447 | ||
1448 | if (!info->tx_buf) { | |
1449 | /* allocate a page of memory for a transmit buffer */ | |
1450 | info->tx_buf = (unsigned char *)get_zeroed_page(GFP_KERNEL); | |
1451 | if (!info->tx_buf) { | |
1452 | printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n", | |
1453 | __FILE__,__LINE__,info->device_name); | |
1454 | return -ENOMEM; | |
1455 | } | |
1456 | } | |
1457 | ||
1458 | info->pending_bh = 0; | |
1459 | ||
a7482a2e PF |
1460 | memset(&info->icount, 0, sizeof(info->icount)); |
1461 | ||
1da177e4 LT |
1462 | init_timer(&info->tx_timer); |
1463 | info->tx_timer.data = (unsigned long)info; | |
1464 | info->tx_timer.function = tx_timeout; | |
1465 | ||
1466 | /* Allocate and claim adapter resources */ | |
1467 | retval = claim_resources(info); | |
1468 | ||
1469 | /* perform existance check and diagnostics */ | |
1470 | if ( !retval ) | |
1471 | retval = adapter_test(info); | |
1472 | ||
1473 | if ( retval ) { | |
1474 | if (capable(CAP_SYS_ADMIN) && info->tty) | |
1475 | set_bit(TTY_IO_ERROR, &info->tty->flags); | |
1476 | release_resources(info); | |
1477 | return retval; | |
1478 | } | |
1479 | ||
1480 | /* program hardware for current parameters */ | |
1481 | mgslpc_change_params(info); | |
1482 | ||
1483 | if (info->tty) | |
1484 | clear_bit(TTY_IO_ERROR, &info->tty->flags); | |
1485 | ||
1486 | info->flags |= ASYNC_INITIALIZED; | |
1487 | ||
1488 | return 0; | |
1489 | } | |
1490 | ||
1491 | /* Called by mgslpc_close() and mgslpc_hangup() to shutdown hardware | |
1492 | */ | |
1493 | static void shutdown(MGSLPC_INFO * info) | |
1494 | { | |
1495 | unsigned long flags; | |
1496 | ||
1497 | if (!(info->flags & ASYNC_INITIALIZED)) | |
1498 | return; | |
1499 | ||
1500 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1501 | printk("%s(%d):mgslpc_shutdown(%s)\n", | |
1502 | __FILE__,__LINE__, info->device_name ); | |
1503 | ||
1504 | /* clear status wait queue because status changes */ | |
1505 | /* can't happen after shutting down the hardware */ | |
1506 | wake_up_interruptible(&info->status_event_wait_q); | |
1507 | wake_up_interruptible(&info->event_wait_q); | |
1508 | ||
1509 | del_timer(&info->tx_timer); | |
1510 | ||
1511 | if (info->tx_buf) { | |
1512 | free_page((unsigned long) info->tx_buf); | |
1513 | info->tx_buf = NULL; | |
1514 | } | |
1515 | ||
1516 | spin_lock_irqsave(&info->lock,flags); | |
1517 | ||
1518 | rx_stop(info); | |
1519 | tx_stop(info); | |
1520 | ||
1521 | /* TODO:disable interrupts instead of reset to preserve signal states */ | |
1522 | reset_device(info); | |
1523 | ||
1524 | if (!info->tty || info->tty->termios->c_cflag & HUPCL) { | |
1525 | info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS); | |
1526 | set_signals(info); | |
1527 | } | |
1528 | ||
1529 | spin_unlock_irqrestore(&info->lock,flags); | |
1530 | ||
1531 | release_resources(info); | |
1532 | ||
1533 | if (info->tty) | |
1534 | set_bit(TTY_IO_ERROR, &info->tty->flags); | |
1535 | ||
1536 | info->flags &= ~ASYNC_INITIALIZED; | |
1537 | } | |
1538 | ||
1539 | static void mgslpc_program_hw(MGSLPC_INFO *info) | |
1540 | { | |
1541 | unsigned long flags; | |
1542 | ||
1543 | spin_lock_irqsave(&info->lock,flags); | |
1544 | ||
1545 | rx_stop(info); | |
1546 | tx_stop(info); | |
1547 | info->tx_count = info->tx_put = info->tx_get = 0; | |
1548 | ||
1549 | if (info->params.mode == MGSL_MODE_HDLC || info->netcount) | |
1550 | hdlc_mode(info); | |
1551 | else | |
1552 | async_mode(info); | |
1553 | ||
1554 | set_signals(info); | |
1555 | ||
1556 | info->dcd_chkcount = 0; | |
1557 | info->cts_chkcount = 0; | |
1558 | info->ri_chkcount = 0; | |
1559 | info->dsr_chkcount = 0; | |
1560 | ||
1561 | irq_enable(info, CHB, IRQ_DCD | IRQ_CTS); | |
1562 | port_irq_enable(info, (unsigned char) PVR_DSR | PVR_RI); | |
1563 | get_signals(info); | |
1564 | ||
1565 | if (info->netcount || info->tty->termios->c_cflag & CREAD) | |
1566 | rx_start(info); | |
1567 | ||
1568 | spin_unlock_irqrestore(&info->lock,flags); | |
1569 | } | |
1570 | ||
1571 | /* Reconfigure adapter based on new parameters | |
1572 | */ | |
1573 | static void mgslpc_change_params(MGSLPC_INFO *info) | |
1574 | { | |
1575 | unsigned cflag; | |
1576 | int bits_per_char; | |
1577 | ||
1578 | if (!info->tty || !info->tty->termios) | |
1579 | return; | |
1580 | ||
1581 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1582 | printk("%s(%d):mgslpc_change_params(%s)\n", | |
1583 | __FILE__,__LINE__, info->device_name ); | |
1584 | ||
1585 | cflag = info->tty->termios->c_cflag; | |
1586 | ||
1587 | /* if B0 rate (hangup) specified then negate DTR and RTS */ | |
1588 | /* otherwise assert DTR and RTS */ | |
1589 | if (cflag & CBAUD) | |
1590 | info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; | |
1591 | else | |
1592 | info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR); | |
1593 | ||
1594 | /* byte size and parity */ | |
1595 | ||
1596 | switch (cflag & CSIZE) { | |
1597 | case CS5: info->params.data_bits = 5; break; | |
1598 | case CS6: info->params.data_bits = 6; break; | |
1599 | case CS7: info->params.data_bits = 7; break; | |
1600 | case CS8: info->params.data_bits = 8; break; | |
1601 | default: info->params.data_bits = 7; break; | |
1602 | } | |
1603 | ||
1604 | if (cflag & CSTOPB) | |
1605 | info->params.stop_bits = 2; | |
1606 | else | |
1607 | info->params.stop_bits = 1; | |
1608 | ||
1609 | info->params.parity = ASYNC_PARITY_NONE; | |
1610 | if (cflag & PARENB) { | |
1611 | if (cflag & PARODD) | |
1612 | info->params.parity = ASYNC_PARITY_ODD; | |
1613 | else | |
1614 | info->params.parity = ASYNC_PARITY_EVEN; | |
1615 | #ifdef CMSPAR | |
1616 | if (cflag & CMSPAR) | |
1617 | info->params.parity = ASYNC_PARITY_SPACE; | |
1618 | #endif | |
1619 | } | |
1620 | ||
1621 | /* calculate number of jiffies to transmit a full | |
1622 | * FIFO (32 bytes) at specified data rate | |
1623 | */ | |
1624 | bits_per_char = info->params.data_bits + | |
1625 | info->params.stop_bits + 1; | |
1626 | ||
1627 | /* if port data rate is set to 460800 or less then | |
1628 | * allow tty settings to override, otherwise keep the | |
1629 | * current data rate. | |
1630 | */ | |
1631 | if (info->params.data_rate <= 460800) { | |
1632 | info->params.data_rate = tty_get_baud_rate(info->tty); | |
1633 | } | |
1634 | ||
1635 | if ( info->params.data_rate ) { | |
1636 | info->timeout = (32*HZ*bits_per_char) / | |
1637 | info->params.data_rate; | |
1638 | } | |
1639 | info->timeout += HZ/50; /* Add .02 seconds of slop */ | |
1640 | ||
1641 | if (cflag & CRTSCTS) | |
1642 | info->flags |= ASYNC_CTS_FLOW; | |
1643 | else | |
1644 | info->flags &= ~ASYNC_CTS_FLOW; | |
1645 | ||
1646 | if (cflag & CLOCAL) | |
1647 | info->flags &= ~ASYNC_CHECK_CD; | |
1648 | else | |
1649 | info->flags |= ASYNC_CHECK_CD; | |
1650 | ||
1651 | /* process tty input control flags */ | |
1652 | ||
1653 | info->read_status_mask = 0; | |
1654 | if (I_INPCK(info->tty)) | |
1655 | info->read_status_mask |= BIT7 | BIT6; | |
1656 | if (I_IGNPAR(info->tty)) | |
1657 | info->ignore_status_mask |= BIT7 | BIT6; | |
1658 | ||
1659 | mgslpc_program_hw(info); | |
1660 | } | |
1661 | ||
1662 | /* Add a character to the transmit buffer | |
1663 | */ | |
1664 | static void mgslpc_put_char(struct tty_struct *tty, unsigned char ch) | |
1665 | { | |
1666 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
1667 | unsigned long flags; | |
1668 | ||
1669 | if (debug_level >= DEBUG_LEVEL_INFO) { | |
1670 | printk( "%s(%d):mgslpc_put_char(%d) on %s\n", | |
1671 | __FILE__,__LINE__,ch,info->device_name); | |
1672 | } | |
1673 | ||
1674 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_put_char")) | |
1675 | return; | |
1676 | ||
1677 | if (!tty || !info->tx_buf) | |
1678 | return; | |
1679 | ||
1680 | spin_lock_irqsave(&info->lock,flags); | |
1681 | ||
1682 | if (info->params.mode == MGSL_MODE_ASYNC || !info->tx_active) { | |
1683 | if (info->tx_count < TXBUFSIZE - 1) { | |
1684 | info->tx_buf[info->tx_put++] = ch; | |
1685 | info->tx_put &= TXBUFSIZE-1; | |
1686 | info->tx_count++; | |
1687 | } | |
1688 | } | |
1689 | ||
1690 | spin_unlock_irqrestore(&info->lock,flags); | |
1691 | } | |
1692 | ||
1693 | /* Enable transmitter so remaining characters in the | |
1694 | * transmit buffer are sent. | |
1695 | */ | |
1696 | static void mgslpc_flush_chars(struct tty_struct *tty) | |
1697 | { | |
1698 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
1699 | unsigned long flags; | |
1700 | ||
1701 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1702 | printk( "%s(%d):mgslpc_flush_chars() entry on %s tx_count=%d\n", | |
1703 | __FILE__,__LINE__,info->device_name,info->tx_count); | |
1704 | ||
1705 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_flush_chars")) | |
1706 | return; | |
1707 | ||
1708 | if (info->tx_count <= 0 || tty->stopped || | |
1709 | tty->hw_stopped || !info->tx_buf) | |
1710 | return; | |
1711 | ||
1712 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1713 | printk( "%s(%d):mgslpc_flush_chars() entry on %s starting transmitter\n", | |
1714 | __FILE__,__LINE__,info->device_name); | |
1715 | ||
1716 | spin_lock_irqsave(&info->lock,flags); | |
1717 | if (!info->tx_active) | |
1718 | tx_start(info); | |
1719 | spin_unlock_irqrestore(&info->lock,flags); | |
1720 | } | |
1721 | ||
1722 | /* Send a block of data | |
1723 | * | |
1724 | * Arguments: | |
1725 | * | |
1726 | * tty pointer to tty information structure | |
1727 | * buf pointer to buffer containing send data | |
1728 | * count size of send data in bytes | |
1729 | * | |
1730 | * Returns: number of characters written | |
1731 | */ | |
1732 | static int mgslpc_write(struct tty_struct * tty, | |
1733 | const unsigned char *buf, int count) | |
1734 | { | |
1735 | int c, ret = 0; | |
1736 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
1737 | unsigned long flags; | |
1738 | ||
1739 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1740 | printk( "%s(%d):mgslpc_write(%s) count=%d\n", | |
1741 | __FILE__,__LINE__,info->device_name,count); | |
1742 | ||
1743 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_write") || | |
1744 | !tty || !info->tx_buf) | |
1745 | goto cleanup; | |
1746 | ||
1747 | if (info->params.mode == MGSL_MODE_HDLC) { | |
1748 | if (count > TXBUFSIZE) { | |
1749 | ret = -EIO; | |
1750 | goto cleanup; | |
1751 | } | |
1752 | if (info->tx_active) | |
1753 | goto cleanup; | |
1754 | else if (info->tx_count) | |
1755 | goto start; | |
1756 | } | |
1757 | ||
1758 | for (;;) { | |
1759 | c = min(count, | |
1760 | min(TXBUFSIZE - info->tx_count - 1, | |
1761 | TXBUFSIZE - info->tx_put)); | |
1762 | if (c <= 0) | |
1763 | break; | |
1764 | ||
1765 | memcpy(info->tx_buf + info->tx_put, buf, c); | |
1766 | ||
1767 | spin_lock_irqsave(&info->lock,flags); | |
1768 | info->tx_put = (info->tx_put + c) & (TXBUFSIZE-1); | |
1769 | info->tx_count += c; | |
1770 | spin_unlock_irqrestore(&info->lock,flags); | |
1771 | ||
1772 | buf += c; | |
1773 | count -= c; | |
1774 | ret += c; | |
1775 | } | |
1776 | start: | |
1777 | if (info->tx_count && !tty->stopped && !tty->hw_stopped) { | |
1778 | spin_lock_irqsave(&info->lock,flags); | |
1779 | if (!info->tx_active) | |
1780 | tx_start(info); | |
1781 | spin_unlock_irqrestore(&info->lock,flags); | |
1782 | } | |
1783 | cleanup: | |
1784 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1785 | printk( "%s(%d):mgslpc_write(%s) returning=%d\n", | |
1786 | __FILE__,__LINE__,info->device_name,ret); | |
1787 | return ret; | |
1788 | } | |
1789 | ||
1790 | /* Return the count of free bytes in transmit buffer | |
1791 | */ | |
1792 | static int mgslpc_write_room(struct tty_struct *tty) | |
1793 | { | |
1794 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
1795 | int ret; | |
1796 | ||
1797 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_write_room")) | |
1798 | return 0; | |
1799 | ||
1800 | if (info->params.mode == MGSL_MODE_HDLC) { | |
1801 | /* HDLC (frame oriented) mode */ | |
1802 | if (info->tx_active) | |
1803 | return 0; | |
1804 | else | |
1805 | return HDLC_MAX_FRAME_SIZE; | |
1806 | } else { | |
1807 | ret = TXBUFSIZE - info->tx_count - 1; | |
1808 | if (ret < 0) | |
1809 | ret = 0; | |
1810 | } | |
1811 | ||
1812 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1813 | printk("%s(%d):mgslpc_write_room(%s)=%d\n", | |
1814 | __FILE__,__LINE__, info->device_name, ret); | |
1815 | return ret; | |
1816 | } | |
1817 | ||
1818 | /* Return the count of bytes in transmit buffer | |
1819 | */ | |
1820 | static int mgslpc_chars_in_buffer(struct tty_struct *tty) | |
1821 | { | |
1822 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
1823 | int rc; | |
1824 | ||
1825 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1826 | printk("%s(%d):mgslpc_chars_in_buffer(%s)\n", | |
1827 | __FILE__,__LINE__, info->device_name ); | |
1828 | ||
1829 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_chars_in_buffer")) | |
1830 | return 0; | |
1831 | ||
1832 | if (info->params.mode == MGSL_MODE_HDLC) | |
1833 | rc = info->tx_active ? info->max_frame_size : 0; | |
1834 | else | |
1835 | rc = info->tx_count; | |
1836 | ||
1837 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1838 | printk("%s(%d):mgslpc_chars_in_buffer(%s)=%d\n", | |
1839 | __FILE__,__LINE__, info->device_name, rc); | |
1840 | ||
1841 | return rc; | |
1842 | } | |
1843 | ||
1844 | /* Discard all data in the send buffer | |
1845 | */ | |
1846 | static void mgslpc_flush_buffer(struct tty_struct *tty) | |
1847 | { | |
1848 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
1849 | unsigned long flags; | |
1850 | ||
1851 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1852 | printk("%s(%d):mgslpc_flush_buffer(%s) entry\n", | |
1853 | __FILE__,__LINE__, info->device_name ); | |
1854 | ||
1855 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_flush_buffer")) | |
1856 | return; | |
1857 | ||
1858 | spin_lock_irqsave(&info->lock,flags); | |
1859 | info->tx_count = info->tx_put = info->tx_get = 0; | |
1860 | del_timer(&info->tx_timer); | |
1861 | spin_unlock_irqrestore(&info->lock,flags); | |
1862 | ||
1863 | wake_up_interruptible(&tty->write_wait); | |
1864 | tty_wakeup(tty); | |
1865 | } | |
1866 | ||
1867 | /* Send a high-priority XON/XOFF character | |
1868 | */ | |
1869 | static void mgslpc_send_xchar(struct tty_struct *tty, char ch) | |
1870 | { | |
1871 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
1872 | unsigned long flags; | |
1873 | ||
1874 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1875 | printk("%s(%d):mgslpc_send_xchar(%s,%d)\n", | |
1876 | __FILE__,__LINE__, info->device_name, ch ); | |
1877 | ||
1878 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_send_xchar")) | |
1879 | return; | |
1880 | ||
1881 | info->x_char = ch; | |
1882 | if (ch) { | |
1883 | spin_lock_irqsave(&info->lock,flags); | |
1884 | if (!info->tx_enabled) | |
1885 | tx_start(info); | |
1886 | spin_unlock_irqrestore(&info->lock,flags); | |
1887 | } | |
1888 | } | |
1889 | ||
1890 | /* Signal remote device to throttle send data (our receive data) | |
1891 | */ | |
1892 | static void mgslpc_throttle(struct tty_struct * tty) | |
1893 | { | |
1894 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
1895 | unsigned long flags; | |
1896 | ||
1897 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1898 | printk("%s(%d):mgslpc_throttle(%s) entry\n", | |
1899 | __FILE__,__LINE__, info->device_name ); | |
1900 | ||
1901 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_throttle")) | |
1902 | return; | |
1903 | ||
1904 | if (I_IXOFF(tty)) | |
1905 | mgslpc_send_xchar(tty, STOP_CHAR(tty)); | |
1906 | ||
1907 | if (tty->termios->c_cflag & CRTSCTS) { | |
1908 | spin_lock_irqsave(&info->lock,flags); | |
1909 | info->serial_signals &= ~SerialSignal_RTS; | |
1910 | set_signals(info); | |
1911 | spin_unlock_irqrestore(&info->lock,flags); | |
1912 | } | |
1913 | } | |
1914 | ||
1915 | /* Signal remote device to stop throttling send data (our receive data) | |
1916 | */ | |
1917 | static void mgslpc_unthrottle(struct tty_struct * tty) | |
1918 | { | |
1919 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
1920 | unsigned long flags; | |
1921 | ||
1922 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1923 | printk("%s(%d):mgslpc_unthrottle(%s) entry\n", | |
1924 | __FILE__,__LINE__, info->device_name ); | |
1925 | ||
1926 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_unthrottle")) | |
1927 | return; | |
1928 | ||
1929 | if (I_IXOFF(tty)) { | |
1930 | if (info->x_char) | |
1931 | info->x_char = 0; | |
1932 | else | |
1933 | mgslpc_send_xchar(tty, START_CHAR(tty)); | |
1934 | } | |
1935 | ||
1936 | if (tty->termios->c_cflag & CRTSCTS) { | |
1937 | spin_lock_irqsave(&info->lock,flags); | |
1938 | info->serial_signals |= SerialSignal_RTS; | |
1939 | set_signals(info); | |
1940 | spin_unlock_irqrestore(&info->lock,flags); | |
1941 | } | |
1942 | } | |
1943 | ||
1944 | /* get the current serial statistics | |
1945 | */ | |
1946 | static int get_stats(MGSLPC_INFO * info, struct mgsl_icount __user *user_icount) | |
1947 | { | |
1948 | int err; | |
1949 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1950 | printk("get_params(%s)\n", info->device_name); | |
a7482a2e PF |
1951 | if (!user_icount) { |
1952 | memset(&info->icount, 0, sizeof(info->icount)); | |
1953 | } else { | |
1954 | COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount)); | |
1955 | if (err) | |
1956 | return -EFAULT; | |
1957 | } | |
1da177e4 LT |
1958 | return 0; |
1959 | } | |
1960 | ||
1961 | /* get the current serial parameters | |
1962 | */ | |
1963 | static int get_params(MGSLPC_INFO * info, MGSL_PARAMS __user *user_params) | |
1964 | { | |
1965 | int err; | |
1966 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1967 | printk("get_params(%s)\n", info->device_name); | |
1968 | COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS)); | |
1969 | if (err) | |
1970 | return -EFAULT; | |
1971 | return 0; | |
1972 | } | |
1973 | ||
1974 | /* set the serial parameters | |
1975 | * | |
1976 | * Arguments: | |
1977 | * | |
1978 | * info pointer to device instance data | |
1979 | * new_params user buffer containing new serial params | |
1980 | * | |
1981 | * Returns: 0 if success, otherwise error code | |
1982 | */ | |
1983 | static int set_params(MGSLPC_INFO * info, MGSL_PARAMS __user *new_params) | |
1984 | { | |
1985 | unsigned long flags; | |
1986 | MGSL_PARAMS tmp_params; | |
1987 | int err; | |
1988 | ||
1989 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1990 | printk("%s(%d):set_params %s\n", __FILE__,__LINE__, | |
1991 | info->device_name ); | |
1992 | COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS)); | |
1993 | if (err) { | |
1994 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
1995 | printk( "%s(%d):set_params(%s) user buffer copy failed\n", | |
1996 | __FILE__,__LINE__,info->device_name); | |
1997 | return -EFAULT; | |
1998 | } | |
1999 | ||
2000 | spin_lock_irqsave(&info->lock,flags); | |
2001 | memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS)); | |
2002 | spin_unlock_irqrestore(&info->lock,flags); | |
2003 | ||
2004 | mgslpc_change_params(info); | |
2005 | ||
2006 | return 0; | |
2007 | } | |
2008 | ||
2009 | static int get_txidle(MGSLPC_INFO * info, int __user *idle_mode) | |
2010 | { | |
2011 | int err; | |
2012 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2013 | printk("get_txidle(%s)=%d\n", info->device_name, info->idle_mode); | |
2014 | COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int)); | |
2015 | if (err) | |
2016 | return -EFAULT; | |
2017 | return 0; | |
2018 | } | |
2019 | ||
2020 | static int set_txidle(MGSLPC_INFO * info, int idle_mode) | |
2021 | { | |
2022 | unsigned long flags; | |
2023 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2024 | printk("set_txidle(%s,%d)\n", info->device_name, idle_mode); | |
2025 | spin_lock_irqsave(&info->lock,flags); | |
2026 | info->idle_mode = idle_mode; | |
2027 | tx_set_idle(info); | |
2028 | spin_unlock_irqrestore(&info->lock,flags); | |
2029 | return 0; | |
2030 | } | |
2031 | ||
2032 | static int get_interface(MGSLPC_INFO * info, int __user *if_mode) | |
2033 | { | |
2034 | int err; | |
2035 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2036 | printk("get_interface(%s)=%d\n", info->device_name, info->if_mode); | |
2037 | COPY_TO_USER(err,if_mode, &info->if_mode, sizeof(int)); | |
2038 | if (err) | |
2039 | return -EFAULT; | |
2040 | return 0; | |
2041 | } | |
2042 | ||
2043 | static int set_interface(MGSLPC_INFO * info, int if_mode) | |
2044 | { | |
2045 | unsigned long flags; | |
2046 | unsigned char val; | |
2047 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2048 | printk("set_interface(%s,%d)\n", info->device_name, if_mode); | |
2049 | spin_lock_irqsave(&info->lock,flags); | |
2050 | info->if_mode = if_mode; | |
2051 | ||
2052 | val = read_reg(info, PVR) & 0x0f; | |
2053 | switch (info->if_mode) | |
2054 | { | |
2055 | case MGSL_INTERFACE_RS232: val |= PVR_RS232; break; | |
2056 | case MGSL_INTERFACE_V35: val |= PVR_V35; break; | |
2057 | case MGSL_INTERFACE_RS422: val |= PVR_RS422; break; | |
2058 | } | |
2059 | write_reg(info, PVR, val); | |
2060 | ||
2061 | spin_unlock_irqrestore(&info->lock,flags); | |
2062 | return 0; | |
2063 | } | |
2064 | ||
2065 | static int set_txenable(MGSLPC_INFO * info, int enable) | |
2066 | { | |
2067 | unsigned long flags; | |
2068 | ||
2069 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2070 | printk("set_txenable(%s,%d)\n", info->device_name, enable); | |
2071 | ||
2072 | spin_lock_irqsave(&info->lock,flags); | |
2073 | if (enable) { | |
2074 | if (!info->tx_enabled) | |
2075 | tx_start(info); | |
2076 | } else { | |
2077 | if (info->tx_enabled) | |
2078 | tx_stop(info); | |
2079 | } | |
2080 | spin_unlock_irqrestore(&info->lock,flags); | |
2081 | return 0; | |
2082 | } | |
2083 | ||
2084 | static int tx_abort(MGSLPC_INFO * info) | |
2085 | { | |
2086 | unsigned long flags; | |
2087 | ||
2088 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2089 | printk("tx_abort(%s)\n", info->device_name); | |
2090 | ||
2091 | spin_lock_irqsave(&info->lock,flags); | |
2092 | if (info->tx_active && info->tx_count && | |
2093 | info->params.mode == MGSL_MODE_HDLC) { | |
2094 | /* clear data count so FIFO is not filled on next IRQ. | |
2095 | * This results in underrun and abort transmission. | |
2096 | */ | |
2097 | info->tx_count = info->tx_put = info->tx_get = 0; | |
2098 | info->tx_aborting = TRUE; | |
2099 | } | |
2100 | spin_unlock_irqrestore(&info->lock,flags); | |
2101 | return 0; | |
2102 | } | |
2103 | ||
2104 | static int set_rxenable(MGSLPC_INFO * info, int enable) | |
2105 | { | |
2106 | unsigned long flags; | |
2107 | ||
2108 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2109 | printk("set_rxenable(%s,%d)\n", info->device_name, enable); | |
2110 | ||
2111 | spin_lock_irqsave(&info->lock,flags); | |
2112 | if (enable) { | |
2113 | if (!info->rx_enabled) | |
2114 | rx_start(info); | |
2115 | } else { | |
2116 | if (info->rx_enabled) | |
2117 | rx_stop(info); | |
2118 | } | |
2119 | spin_unlock_irqrestore(&info->lock,flags); | |
2120 | return 0; | |
2121 | } | |
2122 | ||
2123 | /* wait for specified event to occur | |
2124 | * | |
2125 | * Arguments: info pointer to device instance data | |
2126 | * mask pointer to bitmask of events to wait for | |
2127 | * Return Value: 0 if successful and bit mask updated with | |
2128 | * of events triggerred, | |
2129 | * otherwise error code | |
2130 | */ | |
2131 | static int wait_events(MGSLPC_INFO * info, int __user *mask_ptr) | |
2132 | { | |
2133 | unsigned long flags; | |
2134 | int s; | |
2135 | int rc=0; | |
2136 | struct mgsl_icount cprev, cnow; | |
2137 | int events; | |
2138 | int mask; | |
2139 | struct _input_signal_events oldsigs, newsigs; | |
2140 | DECLARE_WAITQUEUE(wait, current); | |
2141 | ||
2142 | COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int)); | |
2143 | if (rc) | |
2144 | return -EFAULT; | |
2145 | ||
2146 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2147 | printk("wait_events(%s,%d)\n", info->device_name, mask); | |
2148 | ||
2149 | spin_lock_irqsave(&info->lock,flags); | |
2150 | ||
2151 | /* return immediately if state matches requested events */ | |
2152 | get_signals(info); | |
2153 | s = info->serial_signals; | |
2154 | events = mask & | |
2155 | ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) + | |
2156 | ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) + | |
2157 | ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) + | |
2158 | ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) ); | |
2159 | if (events) { | |
2160 | spin_unlock_irqrestore(&info->lock,flags); | |
2161 | goto exit; | |
2162 | } | |
2163 | ||
2164 | /* save current irq counts */ | |
2165 | cprev = info->icount; | |
2166 | oldsigs = info->input_signal_events; | |
2167 | ||
2168 | if ((info->params.mode == MGSL_MODE_HDLC) && | |
2169 | (mask & MgslEvent_ExitHuntMode)) | |
2170 | irq_enable(info, CHA, IRQ_EXITHUNT); | |
2171 | ||
2172 | set_current_state(TASK_INTERRUPTIBLE); | |
2173 | add_wait_queue(&info->event_wait_q, &wait); | |
2174 | ||
2175 | spin_unlock_irqrestore(&info->lock,flags); | |
2176 | ||
2177 | ||
2178 | for(;;) { | |
2179 | schedule(); | |
2180 | if (signal_pending(current)) { | |
2181 | rc = -ERESTARTSYS; | |
2182 | break; | |
2183 | } | |
2184 | ||
2185 | /* get current irq counts */ | |
2186 | spin_lock_irqsave(&info->lock,flags); | |
2187 | cnow = info->icount; | |
2188 | newsigs = info->input_signal_events; | |
2189 | set_current_state(TASK_INTERRUPTIBLE); | |
2190 | spin_unlock_irqrestore(&info->lock,flags); | |
2191 | ||
2192 | /* if no change, wait aborted for some reason */ | |
2193 | if (newsigs.dsr_up == oldsigs.dsr_up && | |
2194 | newsigs.dsr_down == oldsigs.dsr_down && | |
2195 | newsigs.dcd_up == oldsigs.dcd_up && | |
2196 | newsigs.dcd_down == oldsigs.dcd_down && | |
2197 | newsigs.cts_up == oldsigs.cts_up && | |
2198 | newsigs.cts_down == oldsigs.cts_down && | |
2199 | newsigs.ri_up == oldsigs.ri_up && | |
2200 | newsigs.ri_down == oldsigs.ri_down && | |
2201 | cnow.exithunt == cprev.exithunt && | |
2202 | cnow.rxidle == cprev.rxidle) { | |
2203 | rc = -EIO; | |
2204 | break; | |
2205 | } | |
2206 | ||
2207 | events = mask & | |
2208 | ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) + | |
2209 | (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) + | |
2210 | (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) + | |
2211 | (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) + | |
2212 | (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) + | |
2213 | (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) + | |
2214 | (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) + | |
2215 | (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) + | |
2216 | (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) + | |
2217 | (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) ); | |
2218 | if (events) | |
2219 | break; | |
2220 | ||
2221 | cprev = cnow; | |
2222 | oldsigs = newsigs; | |
2223 | } | |
2224 | ||
2225 | remove_wait_queue(&info->event_wait_q, &wait); | |
2226 | set_current_state(TASK_RUNNING); | |
2227 | ||
2228 | if (mask & MgslEvent_ExitHuntMode) { | |
2229 | spin_lock_irqsave(&info->lock,flags); | |
2230 | if (!waitqueue_active(&info->event_wait_q)) | |
2231 | irq_disable(info, CHA, IRQ_EXITHUNT); | |
2232 | spin_unlock_irqrestore(&info->lock,flags); | |
2233 | } | |
2234 | exit: | |
2235 | if (rc == 0) | |
2236 | PUT_USER(rc, events, mask_ptr); | |
2237 | return rc; | |
2238 | } | |
2239 | ||
2240 | static int modem_input_wait(MGSLPC_INFO *info,int arg) | |
2241 | { | |
2242 | unsigned long flags; | |
2243 | int rc; | |
2244 | struct mgsl_icount cprev, cnow; | |
2245 | DECLARE_WAITQUEUE(wait, current); | |
2246 | ||
2247 | /* save current irq counts */ | |
2248 | spin_lock_irqsave(&info->lock,flags); | |
2249 | cprev = info->icount; | |
2250 | add_wait_queue(&info->status_event_wait_q, &wait); | |
2251 | set_current_state(TASK_INTERRUPTIBLE); | |
2252 | spin_unlock_irqrestore(&info->lock,flags); | |
2253 | ||
2254 | for(;;) { | |
2255 | schedule(); | |
2256 | if (signal_pending(current)) { | |
2257 | rc = -ERESTARTSYS; | |
2258 | break; | |
2259 | } | |
2260 | ||
2261 | /* get new irq counts */ | |
2262 | spin_lock_irqsave(&info->lock,flags); | |
2263 | cnow = info->icount; | |
2264 | set_current_state(TASK_INTERRUPTIBLE); | |
2265 | spin_unlock_irqrestore(&info->lock,flags); | |
2266 | ||
2267 | /* if no change, wait aborted for some reason */ | |
2268 | if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && | |
2269 | cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) { | |
2270 | rc = -EIO; | |
2271 | break; | |
2272 | } | |
2273 | ||
2274 | /* check for change in caller specified modem input */ | |
2275 | if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) || | |
2276 | (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) || | |
2277 | (arg & TIOCM_CD && cnow.dcd != cprev.dcd) || | |
2278 | (arg & TIOCM_CTS && cnow.cts != cprev.cts)) { | |
2279 | rc = 0; | |
2280 | break; | |
2281 | } | |
2282 | ||
2283 | cprev = cnow; | |
2284 | } | |
2285 | remove_wait_queue(&info->status_event_wait_q, &wait); | |
2286 | set_current_state(TASK_RUNNING); | |
2287 | return rc; | |
2288 | } | |
2289 | ||
2290 | /* return the state of the serial control and status signals | |
2291 | */ | |
2292 | static int tiocmget(struct tty_struct *tty, struct file *file) | |
2293 | { | |
2294 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
2295 | unsigned int result; | |
2296 | unsigned long flags; | |
2297 | ||
2298 | spin_lock_irqsave(&info->lock,flags); | |
2299 | get_signals(info); | |
2300 | spin_unlock_irqrestore(&info->lock,flags); | |
2301 | ||
2302 | result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS:0) + | |
2303 | ((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR:0) + | |
2304 | ((info->serial_signals & SerialSignal_DCD) ? TIOCM_CAR:0) + | |
2305 | ((info->serial_signals & SerialSignal_RI) ? TIOCM_RNG:0) + | |
2306 | ((info->serial_signals & SerialSignal_DSR) ? TIOCM_DSR:0) + | |
2307 | ((info->serial_signals & SerialSignal_CTS) ? TIOCM_CTS:0); | |
2308 | ||
2309 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2310 | printk("%s(%d):%s tiocmget() value=%08X\n", | |
2311 | __FILE__,__LINE__, info->device_name, result ); | |
2312 | return result; | |
2313 | } | |
2314 | ||
2315 | /* set modem control signals (DTR/RTS) | |
2316 | */ | |
2317 | static int tiocmset(struct tty_struct *tty, struct file *file, | |
2318 | unsigned int set, unsigned int clear) | |
2319 | { | |
2320 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
2321 | unsigned long flags; | |
2322 | ||
2323 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2324 | printk("%s(%d):%s tiocmset(%x,%x)\n", | |
2325 | __FILE__,__LINE__,info->device_name, set, clear); | |
2326 | ||
2327 | if (set & TIOCM_RTS) | |
2328 | info->serial_signals |= SerialSignal_RTS; | |
2329 | if (set & TIOCM_DTR) | |
2330 | info->serial_signals |= SerialSignal_DTR; | |
2331 | if (clear & TIOCM_RTS) | |
2332 | info->serial_signals &= ~SerialSignal_RTS; | |
2333 | if (clear & TIOCM_DTR) | |
2334 | info->serial_signals &= ~SerialSignal_DTR; | |
2335 | ||
2336 | spin_lock_irqsave(&info->lock,flags); | |
2337 | set_signals(info); | |
2338 | spin_unlock_irqrestore(&info->lock,flags); | |
2339 | ||
2340 | return 0; | |
2341 | } | |
2342 | ||
2343 | /* Set or clear transmit break condition | |
2344 | * | |
2345 | * Arguments: tty pointer to tty instance data | |
2346 | * break_state -1=set break condition, 0=clear | |
2347 | */ | |
2348 | static void mgslpc_break(struct tty_struct *tty, int break_state) | |
2349 | { | |
2350 | MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; | |
2351 | unsigned long flags; | |
2352 | ||
2353 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2354 | printk("%s(%d):mgslpc_break(%s,%d)\n", | |
2355 | __FILE__,__LINE__, info->device_name, break_state); | |
2356 | ||
2357 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_break")) | |
2358 | return; | |
2359 | ||
2360 | spin_lock_irqsave(&info->lock,flags); | |
2361 | if (break_state == -1) | |
2362 | set_reg_bits(info, CHA+DAFO, BIT6); | |
2363 | else | |
2364 | clear_reg_bits(info, CHA+DAFO, BIT6); | |
2365 | spin_unlock_irqrestore(&info->lock,flags); | |
2366 | } | |
2367 | ||
2368 | /* Service an IOCTL request | |
2369 | * | |
2370 | * Arguments: | |
2371 | * | |
2372 | * tty pointer to tty instance data | |
2373 | * file pointer to associated file object for device | |
2374 | * cmd IOCTL command code | |
2375 | * arg command argument/context | |
2376 | * | |
2377 | * Return Value: 0 if success, otherwise error code | |
2378 | */ | |
2379 | static int mgslpc_ioctl(struct tty_struct *tty, struct file * file, | |
2380 | unsigned int cmd, unsigned long arg) | |
2381 | { | |
2382 | MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; | |
2383 | ||
2384 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2385 | printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__,__LINE__, | |
2386 | info->device_name, cmd ); | |
2387 | ||
2388 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_ioctl")) | |
2389 | return -ENODEV; | |
2390 | ||
2391 | if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && | |
2392 | (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) { | |
2393 | if (tty->flags & (1 << TTY_IO_ERROR)) | |
2394 | return -EIO; | |
2395 | } | |
2396 | ||
2397 | return ioctl_common(info, cmd, arg); | |
2398 | } | |
2399 | ||
2400 | int ioctl_common(MGSLPC_INFO *info, unsigned int cmd, unsigned long arg) | |
2401 | { | |
2402 | int error; | |
2403 | struct mgsl_icount cnow; /* kernel counter temps */ | |
2404 | struct serial_icounter_struct __user *p_cuser; /* user space */ | |
2405 | void __user *argp = (void __user *)arg; | |
2406 | unsigned long flags; | |
2407 | ||
2408 | switch (cmd) { | |
2409 | case MGSL_IOCGPARAMS: | |
2410 | return get_params(info, argp); | |
2411 | case MGSL_IOCSPARAMS: | |
2412 | return set_params(info, argp); | |
2413 | case MGSL_IOCGTXIDLE: | |
2414 | return get_txidle(info, argp); | |
2415 | case MGSL_IOCSTXIDLE: | |
2416 | return set_txidle(info, (int)arg); | |
2417 | case MGSL_IOCGIF: | |
2418 | return get_interface(info, argp); | |
2419 | case MGSL_IOCSIF: | |
2420 | return set_interface(info,(int)arg); | |
2421 | case MGSL_IOCTXENABLE: | |
2422 | return set_txenable(info,(int)arg); | |
2423 | case MGSL_IOCRXENABLE: | |
2424 | return set_rxenable(info,(int)arg); | |
2425 | case MGSL_IOCTXABORT: | |
2426 | return tx_abort(info); | |
2427 | case MGSL_IOCGSTATS: | |
2428 | return get_stats(info, argp); | |
2429 | case MGSL_IOCWAITEVENT: | |
2430 | return wait_events(info, argp); | |
2431 | case TIOCMIWAIT: | |
2432 | return modem_input_wait(info,(int)arg); | |
2433 | case TIOCGICOUNT: | |
2434 | spin_lock_irqsave(&info->lock,flags); | |
2435 | cnow = info->icount; | |
2436 | spin_unlock_irqrestore(&info->lock,flags); | |
2437 | p_cuser = argp; | |
2438 | PUT_USER(error,cnow.cts, &p_cuser->cts); | |
2439 | if (error) return error; | |
2440 | PUT_USER(error,cnow.dsr, &p_cuser->dsr); | |
2441 | if (error) return error; | |
2442 | PUT_USER(error,cnow.rng, &p_cuser->rng); | |
2443 | if (error) return error; | |
2444 | PUT_USER(error,cnow.dcd, &p_cuser->dcd); | |
2445 | if (error) return error; | |
2446 | PUT_USER(error,cnow.rx, &p_cuser->rx); | |
2447 | if (error) return error; | |
2448 | PUT_USER(error,cnow.tx, &p_cuser->tx); | |
2449 | if (error) return error; | |
2450 | PUT_USER(error,cnow.frame, &p_cuser->frame); | |
2451 | if (error) return error; | |
2452 | PUT_USER(error,cnow.overrun, &p_cuser->overrun); | |
2453 | if (error) return error; | |
2454 | PUT_USER(error,cnow.parity, &p_cuser->parity); | |
2455 | if (error) return error; | |
2456 | PUT_USER(error,cnow.brk, &p_cuser->brk); | |
2457 | if (error) return error; | |
2458 | PUT_USER(error,cnow.buf_overrun, &p_cuser->buf_overrun); | |
2459 | if (error) return error; | |
2460 | return 0; | |
2461 | default: | |
2462 | return -ENOIOCTLCMD; | |
2463 | } | |
2464 | return 0; | |
2465 | } | |
2466 | ||
2467 | /* Set new termios settings | |
2468 | * | |
2469 | * Arguments: | |
2470 | * | |
2471 | * tty pointer to tty structure | |
2472 | * termios pointer to buffer to hold returned old termios | |
2473 | */ | |
2474 | static void mgslpc_set_termios(struct tty_struct *tty, struct termios *old_termios) | |
2475 | { | |
2476 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
2477 | unsigned long flags; | |
2478 | ||
2479 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2480 | printk("%s(%d):mgslpc_set_termios %s\n", __FILE__,__LINE__, | |
2481 | tty->driver->name ); | |
2482 | ||
2483 | /* just return if nothing has changed */ | |
2484 | if ((tty->termios->c_cflag == old_termios->c_cflag) | |
2485 | && (RELEVANT_IFLAG(tty->termios->c_iflag) | |
2486 | == RELEVANT_IFLAG(old_termios->c_iflag))) | |
2487 | return; | |
2488 | ||
2489 | mgslpc_change_params(info); | |
2490 | ||
2491 | /* Handle transition to B0 status */ | |
2492 | if (old_termios->c_cflag & CBAUD && | |
2493 | !(tty->termios->c_cflag & CBAUD)) { | |
2494 | info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR); | |
2495 | spin_lock_irqsave(&info->lock,flags); | |
2496 | set_signals(info); | |
2497 | spin_unlock_irqrestore(&info->lock,flags); | |
2498 | } | |
2499 | ||
2500 | /* Handle transition away from B0 status */ | |
2501 | if (!(old_termios->c_cflag & CBAUD) && | |
2502 | tty->termios->c_cflag & CBAUD) { | |
2503 | info->serial_signals |= SerialSignal_DTR; | |
2504 | if (!(tty->termios->c_cflag & CRTSCTS) || | |
2505 | !test_bit(TTY_THROTTLED, &tty->flags)) { | |
2506 | info->serial_signals |= SerialSignal_RTS; | |
2507 | } | |
2508 | spin_lock_irqsave(&info->lock,flags); | |
2509 | set_signals(info); | |
2510 | spin_unlock_irqrestore(&info->lock,flags); | |
2511 | } | |
2512 | ||
2513 | /* Handle turning off CRTSCTS */ | |
2514 | if (old_termios->c_cflag & CRTSCTS && | |
2515 | !(tty->termios->c_cflag & CRTSCTS)) { | |
2516 | tty->hw_stopped = 0; | |
2517 | tx_release(tty); | |
2518 | } | |
2519 | } | |
2520 | ||
2521 | static void mgslpc_close(struct tty_struct *tty, struct file * filp) | |
2522 | { | |
2523 | MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; | |
2524 | ||
2525 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_close")) | |
2526 | return; | |
2527 | ||
2528 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2529 | printk("%s(%d):mgslpc_close(%s) entry, count=%d\n", | |
2530 | __FILE__,__LINE__, info->device_name, info->count); | |
2531 | ||
2532 | if (!info->count) | |
2533 | return; | |
2534 | ||
2535 | if (tty_hung_up_p(filp)) | |
2536 | goto cleanup; | |
2537 | ||
2538 | if ((tty->count == 1) && (info->count != 1)) { | |
2539 | /* | |
2540 | * tty->count is 1 and the tty structure will be freed. | |
2541 | * info->count should be one in this case. | |
2542 | * if it's not, correct it so that the port is shutdown. | |
2543 | */ | |
2544 | printk("mgslpc_close: bad refcount; tty->count is 1, " | |
2545 | "info->count is %d\n", info->count); | |
2546 | info->count = 1; | |
2547 | } | |
2548 | ||
2549 | info->count--; | |
2550 | ||
2551 | /* if at least one open remaining, leave hardware active */ | |
2552 | if (info->count) | |
2553 | goto cleanup; | |
2554 | ||
2555 | info->flags |= ASYNC_CLOSING; | |
2556 | ||
2557 | /* set tty->closing to notify line discipline to | |
2558 | * only process XON/XOFF characters. Only the N_TTY | |
2559 | * discipline appears to use this (ppp does not). | |
2560 | */ | |
2561 | tty->closing = 1; | |
2562 | ||
2563 | /* wait for transmit data to clear all layers */ | |
2564 | ||
2565 | if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE) { | |
2566 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2567 | printk("%s(%d):mgslpc_close(%s) calling tty_wait_until_sent\n", | |
2568 | __FILE__,__LINE__, info->device_name ); | |
2569 | tty_wait_until_sent(tty, info->closing_wait); | |
2570 | } | |
2571 | ||
2572 | if (info->flags & ASYNC_INITIALIZED) | |
2573 | mgslpc_wait_until_sent(tty, info->timeout); | |
2574 | ||
2575 | if (tty->driver->flush_buffer) | |
2576 | tty->driver->flush_buffer(tty); | |
2577 | ||
2578 | ldisc_flush_buffer(tty); | |
2579 | ||
2580 | shutdown(info); | |
2581 | ||
2582 | tty->closing = 0; | |
2583 | info->tty = NULL; | |
2584 | ||
2585 | if (info->blocked_open) { | |
2586 | if (info->close_delay) { | |
2587 | msleep_interruptible(jiffies_to_msecs(info->close_delay)); | |
2588 | } | |
2589 | wake_up_interruptible(&info->open_wait); | |
2590 | } | |
2591 | ||
2592 | info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); | |
2593 | ||
2594 | wake_up_interruptible(&info->close_wait); | |
2595 | ||
2596 | cleanup: | |
2597 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2598 | printk("%s(%d):mgslpc_close(%s) exit, count=%d\n", __FILE__,__LINE__, | |
2599 | tty->driver->name, info->count); | |
2600 | } | |
2601 | ||
2602 | /* Wait until the transmitter is empty. | |
2603 | */ | |
2604 | static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout) | |
2605 | { | |
2606 | MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; | |
2607 | unsigned long orig_jiffies, char_time; | |
2608 | ||
2609 | if (!info ) | |
2610 | return; | |
2611 | ||
2612 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2613 | printk("%s(%d):mgslpc_wait_until_sent(%s) entry\n", | |
2614 | __FILE__,__LINE__, info->device_name ); | |
2615 | ||
2616 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_wait_until_sent")) | |
2617 | return; | |
2618 | ||
2619 | if (!(info->flags & ASYNC_INITIALIZED)) | |
2620 | goto exit; | |
2621 | ||
2622 | orig_jiffies = jiffies; | |
2623 | ||
2624 | /* Set check interval to 1/5 of estimated time to | |
2625 | * send a character, and make it at least 1. The check | |
2626 | * interval should also be less than the timeout. | |
2627 | * Note: use tight timings here to satisfy the NIST-PCTS. | |
2628 | */ | |
2629 | ||
2630 | if ( info->params.data_rate ) { | |
2631 | char_time = info->timeout/(32 * 5); | |
2632 | if (!char_time) | |
2633 | char_time++; | |
2634 | } else | |
2635 | char_time = 1; | |
2636 | ||
2637 | if (timeout) | |
2638 | char_time = min_t(unsigned long, char_time, timeout); | |
2639 | ||
2640 | if (info->params.mode == MGSL_MODE_HDLC) { | |
2641 | while (info->tx_active) { | |
2642 | msleep_interruptible(jiffies_to_msecs(char_time)); | |
2643 | if (signal_pending(current)) | |
2644 | break; | |
2645 | if (timeout && time_after(jiffies, orig_jiffies + timeout)) | |
2646 | break; | |
2647 | } | |
2648 | } else { | |
2649 | while ((info->tx_count || info->tx_active) && | |
2650 | info->tx_enabled) { | |
2651 | msleep_interruptible(jiffies_to_msecs(char_time)); | |
2652 | if (signal_pending(current)) | |
2653 | break; | |
2654 | if (timeout && time_after(jiffies, orig_jiffies + timeout)) | |
2655 | break; | |
2656 | } | |
2657 | } | |
2658 | ||
2659 | exit: | |
2660 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2661 | printk("%s(%d):mgslpc_wait_until_sent(%s) exit\n", | |
2662 | __FILE__,__LINE__, info->device_name ); | |
2663 | } | |
2664 | ||
2665 | /* Called by tty_hangup() when a hangup is signaled. | |
2666 | * This is the same as closing all open files for the port. | |
2667 | */ | |
2668 | static void mgslpc_hangup(struct tty_struct *tty) | |
2669 | { | |
2670 | MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; | |
2671 | ||
2672 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2673 | printk("%s(%d):mgslpc_hangup(%s)\n", | |
2674 | __FILE__,__LINE__, info->device_name ); | |
2675 | ||
2676 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_hangup")) | |
2677 | return; | |
2678 | ||
2679 | mgslpc_flush_buffer(tty); | |
2680 | shutdown(info); | |
2681 | ||
2682 | info->count = 0; | |
2683 | info->flags &= ~ASYNC_NORMAL_ACTIVE; | |
2684 | info->tty = NULL; | |
2685 | ||
2686 | wake_up_interruptible(&info->open_wait); | |
2687 | } | |
2688 | ||
2689 | /* Block the current process until the specified port | |
2690 | * is ready to be opened. | |
2691 | */ | |
2692 | static int block_til_ready(struct tty_struct *tty, struct file *filp, | |
2693 | MGSLPC_INFO *info) | |
2694 | { | |
2695 | DECLARE_WAITQUEUE(wait, current); | |
2696 | int retval; | |
2697 | int do_clocal = 0, extra_count = 0; | |
2698 | unsigned long flags; | |
2699 | ||
2700 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2701 | printk("%s(%d):block_til_ready on %s\n", | |
2702 | __FILE__,__LINE__, tty->driver->name ); | |
2703 | ||
2704 | if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){ | |
2705 | /* nonblock mode is set or port is not enabled */ | |
2706 | /* just verify that callout device is not active */ | |
2707 | info->flags |= ASYNC_NORMAL_ACTIVE; | |
2708 | return 0; | |
2709 | } | |
2710 | ||
2711 | if (tty->termios->c_cflag & CLOCAL) | |
2712 | do_clocal = 1; | |
2713 | ||
2714 | /* Wait for carrier detect and the line to become | |
2715 | * free (i.e., not in use by the callout). While we are in | |
2716 | * this loop, info->count is dropped by one, so that | |
2717 | * mgslpc_close() knows when to free things. We restore it upon | |
2718 | * exit, either normal or abnormal. | |
2719 | */ | |
2720 | ||
2721 | retval = 0; | |
2722 | add_wait_queue(&info->open_wait, &wait); | |
2723 | ||
2724 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2725 | printk("%s(%d):block_til_ready before block on %s count=%d\n", | |
2726 | __FILE__,__LINE__, tty->driver->name, info->count ); | |
2727 | ||
2728 | spin_lock_irqsave(&info->lock, flags); | |
2729 | if (!tty_hung_up_p(filp)) { | |
2730 | extra_count = 1; | |
2731 | info->count--; | |
2732 | } | |
2733 | spin_unlock_irqrestore(&info->lock, flags); | |
2734 | info->blocked_open++; | |
2735 | ||
2736 | while (1) { | |
2737 | if ((tty->termios->c_cflag & CBAUD)) { | |
2738 | spin_lock_irqsave(&info->lock,flags); | |
2739 | info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; | |
2740 | set_signals(info); | |
2741 | spin_unlock_irqrestore(&info->lock,flags); | |
2742 | } | |
2743 | ||
2744 | set_current_state(TASK_INTERRUPTIBLE); | |
2745 | ||
2746 | if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)){ | |
2747 | retval = (info->flags & ASYNC_HUP_NOTIFY) ? | |
2748 | -EAGAIN : -ERESTARTSYS; | |
2749 | break; | |
2750 | } | |
2751 | ||
2752 | spin_lock_irqsave(&info->lock,flags); | |
2753 | get_signals(info); | |
2754 | spin_unlock_irqrestore(&info->lock,flags); | |
2755 | ||
2756 | if (!(info->flags & ASYNC_CLOSING) && | |
2757 | (do_clocal || (info->serial_signals & SerialSignal_DCD)) ) { | |
2758 | break; | |
2759 | } | |
2760 | ||
2761 | if (signal_pending(current)) { | |
2762 | retval = -ERESTARTSYS; | |
2763 | break; | |
2764 | } | |
2765 | ||
2766 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2767 | printk("%s(%d):block_til_ready blocking on %s count=%d\n", | |
2768 | __FILE__,__LINE__, tty->driver->name, info->count ); | |
2769 | ||
2770 | schedule(); | |
2771 | } | |
2772 | ||
2773 | set_current_state(TASK_RUNNING); | |
2774 | remove_wait_queue(&info->open_wait, &wait); | |
2775 | ||
2776 | if (extra_count) | |
2777 | info->count++; | |
2778 | info->blocked_open--; | |
2779 | ||
2780 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2781 | printk("%s(%d):block_til_ready after blocking on %s count=%d\n", | |
2782 | __FILE__,__LINE__, tty->driver->name, info->count ); | |
2783 | ||
2784 | if (!retval) | |
2785 | info->flags |= ASYNC_NORMAL_ACTIVE; | |
2786 | ||
2787 | return retval; | |
2788 | } | |
2789 | ||
2790 | static int mgslpc_open(struct tty_struct *tty, struct file * filp) | |
2791 | { | |
2792 | MGSLPC_INFO *info; | |
2793 | int retval, line; | |
2794 | unsigned long flags; | |
2795 | ||
2796 | /* verify range of specified line number */ | |
2797 | line = tty->index; | |
2798 | if ((line < 0) || (line >= mgslpc_device_count)) { | |
2799 | printk("%s(%d):mgslpc_open with invalid line #%d.\n", | |
2800 | __FILE__,__LINE__,line); | |
2801 | return -ENODEV; | |
2802 | } | |
2803 | ||
2804 | /* find the info structure for the specified line */ | |
2805 | info = mgslpc_device_list; | |
2806 | while(info && info->line != line) | |
2807 | info = info->next_device; | |
2808 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_open")) | |
2809 | return -ENODEV; | |
2810 | ||
2811 | tty->driver_data = info; | |
2812 | info->tty = tty; | |
2813 | ||
2814 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2815 | printk("%s(%d):mgslpc_open(%s), old ref count = %d\n", | |
2816 | __FILE__,__LINE__,tty->driver->name, info->count); | |
2817 | ||
2818 | /* If port is closing, signal caller to try again */ | |
2819 | if (tty_hung_up_p(filp) || info->flags & ASYNC_CLOSING){ | |
2820 | if (info->flags & ASYNC_CLOSING) | |
2821 | interruptible_sleep_on(&info->close_wait); | |
2822 | retval = ((info->flags & ASYNC_HUP_NOTIFY) ? | |
2823 | -EAGAIN : -ERESTARTSYS); | |
2824 | goto cleanup; | |
2825 | } | |
2826 | ||
2827 | info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0; | |
2828 | ||
2829 | spin_lock_irqsave(&info->netlock, flags); | |
2830 | if (info->netcount) { | |
2831 | retval = -EBUSY; | |
2832 | spin_unlock_irqrestore(&info->netlock, flags); | |
2833 | goto cleanup; | |
2834 | } | |
2835 | info->count++; | |
2836 | spin_unlock_irqrestore(&info->netlock, flags); | |
2837 | ||
2838 | if (info->count == 1) { | |
2839 | /* 1st open on this device, init hardware */ | |
2840 | retval = startup(info); | |
2841 | if (retval < 0) | |
2842 | goto cleanup; | |
2843 | } | |
2844 | ||
2845 | retval = block_til_ready(tty, filp, info); | |
2846 | if (retval) { | |
2847 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2848 | printk("%s(%d):block_til_ready(%s) returned %d\n", | |
2849 | __FILE__,__LINE__, info->device_name, retval); | |
2850 | goto cleanup; | |
2851 | } | |
2852 | ||
2853 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2854 | printk("%s(%d):mgslpc_open(%s) success\n", | |
2855 | __FILE__,__LINE__, info->device_name); | |
2856 | retval = 0; | |
2857 | ||
2858 | cleanup: | |
2859 | if (retval) { | |
2860 | if (tty->count == 1) | |
2861 | info->tty = NULL; /* tty layer will release tty struct */ | |
2862 | if(info->count) | |
2863 | info->count--; | |
2864 | } | |
2865 | ||
2866 | return retval; | |
2867 | } | |
2868 | ||
2869 | /* | |
2870 | * /proc fs routines.... | |
2871 | */ | |
2872 | ||
2873 | static inline int line_info(char *buf, MGSLPC_INFO *info) | |
2874 | { | |
2875 | char stat_buf[30]; | |
2876 | int ret; | |
2877 | unsigned long flags; | |
2878 | ||
2879 | ret = sprintf(buf, "%s:io:%04X irq:%d", | |
2880 | info->device_name, info->io_base, info->irq_level); | |
2881 | ||
2882 | /* output current serial signal states */ | |
2883 | spin_lock_irqsave(&info->lock,flags); | |
2884 | get_signals(info); | |
2885 | spin_unlock_irqrestore(&info->lock,flags); | |
2886 | ||
2887 | stat_buf[0] = 0; | |
2888 | stat_buf[1] = 0; | |
2889 | if (info->serial_signals & SerialSignal_RTS) | |
2890 | strcat(stat_buf, "|RTS"); | |
2891 | if (info->serial_signals & SerialSignal_CTS) | |
2892 | strcat(stat_buf, "|CTS"); | |
2893 | if (info->serial_signals & SerialSignal_DTR) | |
2894 | strcat(stat_buf, "|DTR"); | |
2895 | if (info->serial_signals & SerialSignal_DSR) | |
2896 | strcat(stat_buf, "|DSR"); | |
2897 | if (info->serial_signals & SerialSignal_DCD) | |
2898 | strcat(stat_buf, "|CD"); | |
2899 | if (info->serial_signals & SerialSignal_RI) | |
2900 | strcat(stat_buf, "|RI"); | |
2901 | ||
2902 | if (info->params.mode == MGSL_MODE_HDLC) { | |
2903 | ret += sprintf(buf+ret, " HDLC txok:%d rxok:%d", | |
2904 | info->icount.txok, info->icount.rxok); | |
2905 | if (info->icount.txunder) | |
2906 | ret += sprintf(buf+ret, " txunder:%d", info->icount.txunder); | |
2907 | if (info->icount.txabort) | |
2908 | ret += sprintf(buf+ret, " txabort:%d", info->icount.txabort); | |
2909 | if (info->icount.rxshort) | |
2910 | ret += sprintf(buf+ret, " rxshort:%d", info->icount.rxshort); | |
2911 | if (info->icount.rxlong) | |
2912 | ret += sprintf(buf+ret, " rxlong:%d", info->icount.rxlong); | |
2913 | if (info->icount.rxover) | |
2914 | ret += sprintf(buf+ret, " rxover:%d", info->icount.rxover); | |
2915 | if (info->icount.rxcrc) | |
2916 | ret += sprintf(buf+ret, " rxcrc:%d", info->icount.rxcrc); | |
2917 | } else { | |
2918 | ret += sprintf(buf+ret, " ASYNC tx:%d rx:%d", | |
2919 | info->icount.tx, info->icount.rx); | |
2920 | if (info->icount.frame) | |
2921 | ret += sprintf(buf+ret, " fe:%d", info->icount.frame); | |
2922 | if (info->icount.parity) | |
2923 | ret += sprintf(buf+ret, " pe:%d", info->icount.parity); | |
2924 | if (info->icount.brk) | |
2925 | ret += sprintf(buf+ret, " brk:%d", info->icount.brk); | |
2926 | if (info->icount.overrun) | |
2927 | ret += sprintf(buf+ret, " oe:%d", info->icount.overrun); | |
2928 | } | |
2929 | ||
2930 | /* Append serial signal status to end */ | |
2931 | ret += sprintf(buf+ret, " %s\n", stat_buf+1); | |
2932 | ||
2933 | ret += sprintf(buf+ret, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n", | |
2934 | info->tx_active,info->bh_requested,info->bh_running, | |
2935 | info->pending_bh); | |
2936 | ||
2937 | return ret; | |
2938 | } | |
2939 | ||
2940 | /* Called to print information about devices | |
2941 | */ | |
2942 | static int mgslpc_read_proc(char *page, char **start, off_t off, int count, | |
2943 | int *eof, void *data) | |
2944 | { | |
2945 | int len = 0, l; | |
2946 | off_t begin = 0; | |
2947 | MGSLPC_INFO *info; | |
2948 | ||
2949 | len += sprintf(page, "synclink driver:%s\n", driver_version); | |
2950 | ||
2951 | info = mgslpc_device_list; | |
2952 | while( info ) { | |
2953 | l = line_info(page + len, info); | |
2954 | len += l; | |
2955 | if (len+begin > off+count) | |
2956 | goto done; | |
2957 | if (len+begin < off) { | |
2958 | begin += len; | |
2959 | len = 0; | |
2960 | } | |
2961 | info = info->next_device; | |
2962 | } | |
2963 | ||
2964 | *eof = 1; | |
2965 | done: | |
2966 | if (off >= len+begin) | |
2967 | return 0; | |
2968 | *start = page + (off-begin); | |
2969 | return ((count < begin+len-off) ? count : begin+len-off); | |
2970 | } | |
2971 | ||
2972 | int rx_alloc_buffers(MGSLPC_INFO *info) | |
2973 | { | |
2974 | /* each buffer has header and data */ | |
2975 | info->rx_buf_size = sizeof(RXBUF) + info->max_frame_size; | |
2976 | ||
2977 | /* calculate total allocation size for 8 buffers */ | |
2978 | info->rx_buf_total_size = info->rx_buf_size * 8; | |
2979 | ||
2980 | /* limit total allocated memory */ | |
2981 | if (info->rx_buf_total_size > 0x10000) | |
2982 | info->rx_buf_total_size = 0x10000; | |
2983 | ||
2984 | /* calculate number of buffers */ | |
2985 | info->rx_buf_count = info->rx_buf_total_size / info->rx_buf_size; | |
2986 | ||
2987 | info->rx_buf = kmalloc(info->rx_buf_total_size, GFP_KERNEL); | |
2988 | if (info->rx_buf == NULL) | |
2989 | return -ENOMEM; | |
2990 | ||
2991 | rx_reset_buffers(info); | |
2992 | return 0; | |
2993 | } | |
2994 | ||
2995 | void rx_free_buffers(MGSLPC_INFO *info) | |
2996 | { | |
735d5661 | 2997 | kfree(info->rx_buf); |
1da177e4 LT |
2998 | info->rx_buf = NULL; |
2999 | } | |
3000 | ||
3001 | int claim_resources(MGSLPC_INFO *info) | |
3002 | { | |
3003 | if (rx_alloc_buffers(info) < 0 ) { | |
3004 | printk( "Cant allocate rx buffer %s\n", info->device_name); | |
3005 | release_resources(info); | |
3006 | return -ENODEV; | |
3007 | } | |
3008 | return 0; | |
3009 | } | |
3010 | ||
3011 | void release_resources(MGSLPC_INFO *info) | |
3012 | { | |
3013 | if (debug_level >= DEBUG_LEVEL_INFO) | |
3014 | printk("release_resources(%s)\n", info->device_name); | |
3015 | rx_free_buffers(info); | |
3016 | } | |
3017 | ||
3018 | /* Add the specified device instance data structure to the | |
3019 | * global linked list of devices and increment the device count. | |
3020 | * | |
3021 | * Arguments: info pointer to device instance data | |
3022 | */ | |
3023 | void mgslpc_add_device(MGSLPC_INFO *info) | |
3024 | { | |
3025 | info->next_device = NULL; | |
3026 | info->line = mgslpc_device_count; | |
3027 | sprintf(info->device_name,"ttySLP%d",info->line); | |
3028 | ||
3029 | if (info->line < MAX_DEVICE_COUNT) { | |
3030 | if (maxframe[info->line]) | |
3031 | info->max_frame_size = maxframe[info->line]; | |
3032 | info->dosyncppp = dosyncppp[info->line]; | |
3033 | } | |
3034 | ||
3035 | mgslpc_device_count++; | |
3036 | ||
3037 | if (!mgslpc_device_list) | |
3038 | mgslpc_device_list = info; | |
3039 | else { | |
3040 | MGSLPC_INFO *current_dev = mgslpc_device_list; | |
3041 | while( current_dev->next_device ) | |
3042 | current_dev = current_dev->next_device; | |
3043 | current_dev->next_device = info; | |
3044 | } | |
3045 | ||
3046 | if (info->max_frame_size < 4096) | |
3047 | info->max_frame_size = 4096; | |
3048 | else if (info->max_frame_size > 65535) | |
3049 | info->max_frame_size = 65535; | |
3050 | ||
3051 | printk( "SyncLink PC Card %s:IO=%04X IRQ=%d\n", | |
3052 | info->device_name, info->io_base, info->irq_level); | |
3053 | ||
3054 | #ifdef CONFIG_HDLC | |
3055 | hdlcdev_init(info); | |
3056 | #endif | |
3057 | } | |
3058 | ||
3059 | void mgslpc_remove_device(MGSLPC_INFO *remove_info) | |
3060 | { | |
3061 | MGSLPC_INFO *info = mgslpc_device_list; | |
3062 | MGSLPC_INFO *last = NULL; | |
3063 | ||
3064 | while(info) { | |
3065 | if (info == remove_info) { | |
3066 | if (last) | |
3067 | last->next_device = info->next_device; | |
3068 | else | |
3069 | mgslpc_device_list = info->next_device; | |
3070 | #ifdef CONFIG_HDLC | |
3071 | hdlcdev_exit(info); | |
3072 | #endif | |
3073 | release_resources(info); | |
3074 | kfree(info); | |
3075 | mgslpc_device_count--; | |
3076 | return; | |
3077 | } | |
3078 | last = info; | |
3079 | info = info->next_device; | |
3080 | } | |
3081 | } | |
3082 | ||
4af48c8c DB |
3083 | static struct pcmcia_device_id mgslpc_ids[] = { |
3084 | PCMCIA_DEVICE_MANF_CARD(0x02c5, 0x0050), | |
3085 | PCMCIA_DEVICE_NULL | |
3086 | }; | |
3087 | MODULE_DEVICE_TABLE(pcmcia, mgslpc_ids); | |
3088 | ||
1da177e4 LT |
3089 | static struct pcmcia_driver mgslpc_driver = { |
3090 | .owner = THIS_MODULE, | |
3091 | .drv = { | |
3092 | .name = "synclink_cs", | |
3093 | }, | |
3094 | .attach = mgslpc_attach, | |
1e212f36 | 3095 | .event = mgslpc_event, |
1da177e4 | 3096 | .detach = mgslpc_detach, |
4af48c8c | 3097 | .id_table = mgslpc_ids, |
1da177e4 LT |
3098 | }; |
3099 | ||
3100 | static struct tty_operations mgslpc_ops = { | |
3101 | .open = mgslpc_open, | |
3102 | .close = mgslpc_close, | |
3103 | .write = mgslpc_write, | |
3104 | .put_char = mgslpc_put_char, | |
3105 | .flush_chars = mgslpc_flush_chars, | |
3106 | .write_room = mgslpc_write_room, | |
3107 | .chars_in_buffer = mgslpc_chars_in_buffer, | |
3108 | .flush_buffer = mgslpc_flush_buffer, | |
3109 | .ioctl = mgslpc_ioctl, | |
3110 | .throttle = mgslpc_throttle, | |
3111 | .unthrottle = mgslpc_unthrottle, | |
3112 | .send_xchar = mgslpc_send_xchar, | |
3113 | .break_ctl = mgslpc_break, | |
3114 | .wait_until_sent = mgslpc_wait_until_sent, | |
3115 | .read_proc = mgslpc_read_proc, | |
3116 | .set_termios = mgslpc_set_termios, | |
3117 | .stop = tx_pause, | |
3118 | .start = tx_release, | |
3119 | .hangup = mgslpc_hangup, | |
3120 | .tiocmget = tiocmget, | |
3121 | .tiocmset = tiocmset, | |
3122 | }; | |
3123 | ||
3124 | static void synclink_cs_cleanup(void) | |
3125 | { | |
3126 | int rc; | |
3127 | ||
3128 | printk("Unloading %s: version %s\n", driver_name, driver_version); | |
3129 | ||
3130 | while(mgslpc_device_list) | |
3131 | mgslpc_remove_device(mgslpc_device_list); | |
3132 | ||
3133 | if (serial_driver) { | |
3134 | if ((rc = tty_unregister_driver(serial_driver))) | |
3135 | printk("%s(%d) failed to unregister tty driver err=%d\n", | |
3136 | __FILE__,__LINE__,rc); | |
3137 | put_tty_driver(serial_driver); | |
3138 | } | |
3139 | ||
3140 | pcmcia_unregister_driver(&mgslpc_driver); | |
3141 | BUG_ON(dev_list != NULL); | |
3142 | } | |
3143 | ||
3144 | static int __init synclink_cs_init(void) | |
3145 | { | |
3146 | int rc; | |
3147 | ||
3148 | if (break_on_load) { | |
3149 | mgslpc_get_text_ptr(); | |
3150 | BREAKPOINT(); | |
3151 | } | |
3152 | ||
3153 | printk("%s %s\n", driver_name, driver_version); | |
3154 | ||
3155 | if ((rc = pcmcia_register_driver(&mgslpc_driver)) < 0) | |
3156 | return rc; | |
3157 | ||
3158 | serial_driver = alloc_tty_driver(MAX_DEVICE_COUNT); | |
3159 | if (!serial_driver) { | |
3160 | rc = -ENOMEM; | |
3161 | goto error; | |
3162 | } | |
3163 | ||
3164 | /* Initialize the tty_driver structure */ | |
3165 | ||
3166 | serial_driver->owner = THIS_MODULE; | |
3167 | serial_driver->driver_name = "synclink_cs"; | |
3168 | serial_driver->name = "ttySLP"; | |
3169 | serial_driver->major = ttymajor; | |
3170 | serial_driver->minor_start = 64; | |
3171 | serial_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
3172 | serial_driver->subtype = SERIAL_TYPE_NORMAL; | |
3173 | serial_driver->init_termios = tty_std_termios; | |
3174 | serial_driver->init_termios.c_cflag = | |
3175 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
3176 | serial_driver->flags = TTY_DRIVER_REAL_RAW; | |
3177 | tty_set_operations(serial_driver, &mgslpc_ops); | |
3178 | ||
3179 | if ((rc = tty_register_driver(serial_driver)) < 0) { | |
3180 | printk("%s(%d):Couldn't register serial driver\n", | |
3181 | __FILE__,__LINE__); | |
3182 | put_tty_driver(serial_driver); | |
3183 | serial_driver = NULL; | |
3184 | goto error; | |
3185 | } | |
3186 | ||
3187 | printk("%s %s, tty major#%d\n", | |
3188 | driver_name, driver_version, | |
3189 | serial_driver->major); | |
3190 | ||
3191 | return 0; | |
3192 | ||
3193 | error: | |
3194 | synclink_cs_cleanup(); | |
3195 | return rc; | |
3196 | } | |
3197 | ||
3198 | static void __exit synclink_cs_exit(void) | |
3199 | { | |
3200 | synclink_cs_cleanup(); | |
3201 | } | |
3202 | ||
3203 | module_init(synclink_cs_init); | |
3204 | module_exit(synclink_cs_exit); | |
3205 | ||
3206 | static void mgslpc_set_rate(MGSLPC_INFO *info, unsigned char channel, unsigned int rate) | |
3207 | { | |
3208 | unsigned int M, N; | |
3209 | unsigned char val; | |
3210 | ||
3211 | /* note:standard BRG mode is broken in V3.2 chip | |
3212 | * so enhanced mode is always used | |
3213 | */ | |
3214 | ||
3215 | if (rate) { | |
3216 | N = 3686400 / rate; | |
3217 | if (!N) | |
3218 | N = 1; | |
3219 | N >>= 1; | |
3220 | for (M = 1; N > 64 && M < 16; M++) | |
3221 | N >>= 1; | |
3222 | N--; | |
3223 | ||
3224 | /* BGR[5..0] = N | |
3225 | * BGR[9..6] = M | |
3226 | * BGR[7..0] contained in BGR register | |
3227 | * BGR[9..8] contained in CCR2[7..6] | |
3228 | * divisor = (N+1)*2^M | |
3229 | * | |
3230 | * Note: M *must* not be zero (causes asymetric duty cycle) | |
3231 | */ | |
3232 | write_reg(info, (unsigned char) (channel + BGR), | |
3233 | (unsigned char) ((M << 6) + N)); | |
3234 | val = read_reg(info, (unsigned char) (channel + CCR2)) & 0x3f; | |
3235 | val |= ((M << 4) & 0xc0); | |
3236 | write_reg(info, (unsigned char) (channel + CCR2), val); | |
3237 | } | |
3238 | } | |
3239 | ||
3240 | /* Enabled the AUX clock output at the specified frequency. | |
3241 | */ | |
3242 | static void enable_auxclk(MGSLPC_INFO *info) | |
3243 | { | |
3244 | unsigned char val; | |
3245 | ||
3246 | /* MODE | |
3247 | * | |
3248 | * 07..06 MDS[1..0] 10 = transparent HDLC mode | |
3249 | * 05 ADM Address Mode, 0 = no addr recognition | |
3250 | * 04 TMD Timer Mode, 0 = external | |
3251 | * 03 RAC Receiver Active, 0 = inactive | |
3252 | * 02 RTS 0=RTS active during xmit, 1=RTS always active | |
3253 | * 01 TRS Timer Resolution, 1=512 | |
3254 | * 00 TLP Test Loop, 0 = no loop | |
3255 | * | |
3256 | * 1000 0010 | |
3257 | */ | |
3258 | val = 0x82; | |
3259 | ||
3260 | /* channel B RTS is used to enable AUXCLK driver on SP505 */ | |
3261 | if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed) | |
3262 | val |= BIT2; | |
3263 | write_reg(info, CHB + MODE, val); | |
3264 | ||
3265 | /* CCR0 | |
3266 | * | |
3267 | * 07 PU Power Up, 1=active, 0=power down | |
3268 | * 06 MCE Master Clock Enable, 1=enabled | |
3269 | * 05 Reserved, 0 | |
3270 | * 04..02 SC[2..0] Encoding | |
3271 | * 01..00 SM[1..0] Serial Mode, 00=HDLC | |
3272 | * | |
3273 | * 11000000 | |
3274 | */ | |
3275 | write_reg(info, CHB + CCR0, 0xc0); | |
3276 | ||
3277 | /* CCR1 | |
3278 | * | |
3279 | * 07 SFLG Shared Flag, 0 = disable shared flags | |
3280 | * 06 GALP Go Active On Loop, 0 = not used | |
3281 | * 05 GLP Go On Loop, 0 = not used | |
3282 | * 04 ODS Output Driver Select, 1=TxD is push-pull output | |
3283 | * 03 ITF Interframe Time Fill, 0=mark, 1=flag | |
3284 | * 02..00 CM[2..0] Clock Mode | |
3285 | * | |
3286 | * 0001 0111 | |
3287 | */ | |
3288 | write_reg(info, CHB + CCR1, 0x17); | |
3289 | ||
3290 | /* CCR2 (Channel B) | |
3291 | * | |
3292 | * 07..06 BGR[9..8] Baud rate bits 9..8 | |
3293 | * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value | |
3294 | * 04 SSEL Clock source select, 1=submode b | |
3295 | * 03 TOE 0=TxCLK is input, 1=TxCLK is output | |
3296 | * 02 RWX Read/Write Exchange 0=disabled | |
3297 | * 01 C32, CRC select, 0=CRC-16, 1=CRC-32 | |
3298 | * 00 DIV, data inversion 0=disabled, 1=enabled | |
3299 | * | |
3300 | * 0011 1000 | |
3301 | */ | |
3302 | if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed) | |
3303 | write_reg(info, CHB + CCR2, 0x38); | |
3304 | else | |
3305 | write_reg(info, CHB + CCR2, 0x30); | |
3306 | ||
3307 | /* CCR4 | |
3308 | * | |
3309 | * 07 MCK4 Master Clock Divide by 4, 1=enabled | |
3310 | * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled | |
3311 | * 05 TST1 Test Pin, 0=normal operation | |
3312 | * 04 ICD Ivert Carrier Detect, 1=enabled (active low) | |
3313 | * 03..02 Reserved, must be 0 | |
3314 | * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes | |
3315 | * | |
3316 | * 0101 0000 | |
3317 | */ | |
3318 | write_reg(info, CHB + CCR4, 0x50); | |
3319 | ||
3320 | /* if auxclk not enabled, set internal BRG so | |
3321 | * CTS transitions can be detected (requires TxC) | |
3322 | */ | |
3323 | if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed) | |
3324 | mgslpc_set_rate(info, CHB, info->params.clock_speed); | |
3325 | else | |
3326 | mgslpc_set_rate(info, CHB, 921600); | |
3327 | } | |
3328 | ||
3329 | static void loopback_enable(MGSLPC_INFO *info) | |
3330 | { | |
3331 | unsigned char val; | |
3332 | ||
3333 | /* CCR1:02..00 CM[2..0] Clock Mode = 111 (clock mode 7) */ | |
3334 | val = read_reg(info, CHA + CCR1) | (BIT2 + BIT1 + BIT0); | |
3335 | write_reg(info, CHA + CCR1, val); | |
3336 | ||
3337 | /* CCR2:04 SSEL Clock source select, 1=submode b */ | |
3338 | val = read_reg(info, CHA + CCR2) | (BIT4 + BIT5); | |
3339 | write_reg(info, CHA + CCR2, val); | |
3340 | ||
3341 | /* set LinkSpeed if available, otherwise default to 2Mbps */ | |
3342 | if (info->params.clock_speed) | |
3343 | mgslpc_set_rate(info, CHA, info->params.clock_speed); | |
3344 | else | |
3345 | mgslpc_set_rate(info, CHA, 1843200); | |
3346 | ||
3347 | /* MODE:00 TLP Test Loop, 1=loopback enabled */ | |
3348 | val = read_reg(info, CHA + MODE) | BIT0; | |
3349 | write_reg(info, CHA + MODE, val); | |
3350 | } | |
3351 | ||
3352 | void hdlc_mode(MGSLPC_INFO *info) | |
3353 | { | |
3354 | unsigned char val; | |
3355 | unsigned char clkmode, clksubmode; | |
3356 | ||
3357 | /* disable all interrupts */ | |
3358 | irq_disable(info, CHA, 0xffff); | |
3359 | irq_disable(info, CHB, 0xffff); | |
3360 | port_irq_disable(info, 0xff); | |
3361 | ||
3362 | /* assume clock mode 0a, rcv=RxC xmt=TxC */ | |
3363 | clkmode = clksubmode = 0; | |
3364 | if (info->params.flags & HDLC_FLAG_RXC_DPLL | |
3365 | && info->params.flags & HDLC_FLAG_TXC_DPLL) { | |
3366 | /* clock mode 7a, rcv = DPLL, xmt = DPLL */ | |
3367 | clkmode = 7; | |
3368 | } else if (info->params.flags & HDLC_FLAG_RXC_BRG | |
3369 | && info->params.flags & HDLC_FLAG_TXC_BRG) { | |
3370 | /* clock mode 7b, rcv = BRG, xmt = BRG */ | |
3371 | clkmode = 7; | |
3372 | clksubmode = 1; | |
3373 | } else if (info->params.flags & HDLC_FLAG_RXC_DPLL) { | |
3374 | if (info->params.flags & HDLC_FLAG_TXC_BRG) { | |
3375 | /* clock mode 6b, rcv = DPLL, xmt = BRG/16 */ | |
3376 | clkmode = 6; | |
3377 | clksubmode = 1; | |
3378 | } else { | |
3379 | /* clock mode 6a, rcv = DPLL, xmt = TxC */ | |
3380 | clkmode = 6; | |
3381 | } | |
3382 | } else if (info->params.flags & HDLC_FLAG_TXC_BRG) { | |
3383 | /* clock mode 0b, rcv = RxC, xmt = BRG */ | |
3384 | clksubmode = 1; | |
3385 | } | |
3386 | ||
3387 | /* MODE | |
3388 | * | |
3389 | * 07..06 MDS[1..0] 10 = transparent HDLC mode | |
3390 | * 05 ADM Address Mode, 0 = no addr recognition | |
3391 | * 04 TMD Timer Mode, 0 = external | |
3392 | * 03 RAC Receiver Active, 0 = inactive | |
3393 | * 02 RTS 0=RTS active during xmit, 1=RTS always active | |
3394 | * 01 TRS Timer Resolution, 1=512 | |
3395 | * 00 TLP Test Loop, 0 = no loop | |
3396 | * | |
3397 | * 1000 0010 | |
3398 | */ | |
3399 | val = 0x82; | |
3400 | if (info->params.loopback) | |
3401 | val |= BIT0; | |
3402 | ||
3403 | /* preserve RTS state */ | |
3404 | if (info->serial_signals & SerialSignal_RTS) | |
3405 | val |= BIT2; | |
3406 | write_reg(info, CHA + MODE, val); | |
3407 | ||
3408 | /* CCR0 | |
3409 | * | |
3410 | * 07 PU Power Up, 1=active, 0=power down | |
3411 | * 06 MCE Master Clock Enable, 1=enabled | |
3412 | * 05 Reserved, 0 | |
3413 | * 04..02 SC[2..0] Encoding | |
3414 | * 01..00 SM[1..0] Serial Mode, 00=HDLC | |
3415 | * | |
3416 | * 11000000 | |
3417 | */ | |
3418 | val = 0xc0; | |
3419 | switch (info->params.encoding) | |
3420 | { | |
3421 | case HDLC_ENCODING_NRZI: | |
3422 | val |= BIT3; | |
3423 | break; | |
3424 | case HDLC_ENCODING_BIPHASE_SPACE: | |
3425 | val |= BIT4; | |
3426 | break; // FM0 | |
3427 | case HDLC_ENCODING_BIPHASE_MARK: | |
3428 | val |= BIT4 + BIT2; | |
3429 | break; // FM1 | |
3430 | case HDLC_ENCODING_BIPHASE_LEVEL: | |
3431 | val |= BIT4 + BIT3; | |
3432 | break; // Manchester | |
3433 | } | |
3434 | write_reg(info, CHA + CCR0, val); | |
3435 | ||
3436 | /* CCR1 | |
3437 | * | |
3438 | * 07 SFLG Shared Flag, 0 = disable shared flags | |
3439 | * 06 GALP Go Active On Loop, 0 = not used | |
3440 | * 05 GLP Go On Loop, 0 = not used | |
3441 | * 04 ODS Output Driver Select, 1=TxD is push-pull output | |
3442 | * 03 ITF Interframe Time Fill, 0=mark, 1=flag | |
3443 | * 02..00 CM[2..0] Clock Mode | |
3444 | * | |
3445 | * 0001 0000 | |
3446 | */ | |
3447 | val = 0x10 + clkmode; | |
3448 | write_reg(info, CHA + CCR1, val); | |
3449 | ||
3450 | /* CCR2 | |
3451 | * | |
3452 | * 07..06 BGR[9..8] Baud rate bits 9..8 | |
3453 | * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value | |
3454 | * 04 SSEL Clock source select, 1=submode b | |
3455 | * 03 TOE 0=TxCLK is input, 0=TxCLK is input | |
3456 | * 02 RWX Read/Write Exchange 0=disabled | |
3457 | * 01 C32, CRC select, 0=CRC-16, 1=CRC-32 | |
3458 | * 00 DIV, data inversion 0=disabled, 1=enabled | |
3459 | * | |
3460 | * 0000 0000 | |
3461 | */ | |
3462 | val = 0x00; | |
3463 | if (clkmode == 2 || clkmode == 3 || clkmode == 6 | |
3464 | || clkmode == 7 || (clkmode == 0 && clksubmode == 1)) | |
3465 | val |= BIT5; | |
3466 | if (clksubmode) | |
3467 | val |= BIT4; | |
3468 | if (info->params.crc_type == HDLC_CRC_32_CCITT) | |
3469 | val |= BIT1; | |
3470 | if (info->params.encoding == HDLC_ENCODING_NRZB) | |
3471 | val |= BIT0; | |
3472 | write_reg(info, CHA + CCR2, val); | |
3473 | ||
3474 | /* CCR3 | |
3475 | * | |
3476 | * 07..06 PRE[1..0] Preamble count 00=1, 01=2, 10=4, 11=8 | |
3477 | * 05 EPT Enable preamble transmission, 1=enabled | |
3478 | * 04 RADD Receive address pushed to FIFO, 0=disabled | |
3479 | * 03 CRL CRC Reset Level, 0=FFFF | |
3480 | * 02 RCRC Rx CRC 0=On 1=Off | |
3481 | * 01 TCRC Tx CRC 0=On 1=Off | |
3482 | * 00 PSD DPLL Phase Shift Disable | |
3483 | * | |
3484 | * 0000 0000 | |
3485 | */ | |
3486 | val = 0x00; | |
3487 | if (info->params.crc_type == HDLC_CRC_NONE) | |
3488 | val |= BIT2 + BIT1; | |
3489 | if (info->params.preamble != HDLC_PREAMBLE_PATTERN_NONE) | |
3490 | val |= BIT5; | |
3491 | switch (info->params.preamble_length) | |
3492 | { | |
3493 | case HDLC_PREAMBLE_LENGTH_16BITS: | |
3494 | val |= BIT6; | |
3495 | break; | |
3496 | case HDLC_PREAMBLE_LENGTH_32BITS: | |
3497 | val |= BIT6; | |
3498 | break; | |
3499 | case HDLC_PREAMBLE_LENGTH_64BITS: | |
3500 | val |= BIT7 + BIT6; | |
3501 | break; | |
3502 | } | |
3503 | write_reg(info, CHA + CCR3, val); | |
3504 | ||
3505 | /* PRE - Preamble pattern */ | |
3506 | val = 0; | |
3507 | switch (info->params.preamble) | |
3508 | { | |
3509 | case HDLC_PREAMBLE_PATTERN_FLAGS: val = 0x7e; break; | |
3510 | case HDLC_PREAMBLE_PATTERN_10: val = 0xaa; break; | |
3511 | case HDLC_PREAMBLE_PATTERN_01: val = 0x55; break; | |
3512 | case HDLC_PREAMBLE_PATTERN_ONES: val = 0xff; break; | |
3513 | } | |
3514 | write_reg(info, CHA + PRE, val); | |
3515 | ||
3516 | /* CCR4 | |
3517 | * | |
3518 | * 07 MCK4 Master Clock Divide by 4, 1=enabled | |
3519 | * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled | |
3520 | * 05 TST1 Test Pin, 0=normal operation | |
3521 | * 04 ICD Ivert Carrier Detect, 1=enabled (active low) | |
3522 | * 03..02 Reserved, must be 0 | |
3523 | * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes | |
3524 | * | |
3525 | * 0101 0000 | |
3526 | */ | |
3527 | val = 0x50; | |
3528 | write_reg(info, CHA + CCR4, val); | |
3529 | if (info->params.flags & HDLC_FLAG_RXC_DPLL) | |
3530 | mgslpc_set_rate(info, CHA, info->params.clock_speed * 16); | |
3531 | else | |
3532 | mgslpc_set_rate(info, CHA, info->params.clock_speed); | |
3533 | ||
3534 | /* RLCR Receive length check register | |
3535 | * | |
3536 | * 7 1=enable receive length check | |
3537 | * 6..0 Max frame length = (RL + 1) * 32 | |
3538 | */ | |
3539 | write_reg(info, CHA + RLCR, 0); | |
3540 | ||
3541 | /* XBCH Transmit Byte Count High | |
3542 | * | |
3543 | * 07 DMA mode, 0 = interrupt driven | |
3544 | * 06 NRM, 0=ABM (ignored) | |
3545 | * 05 CAS Carrier Auto Start | |
3546 | * 04 XC Transmit Continuously (ignored) | |
3547 | * 03..00 XBC[10..8] Transmit byte count bits 10..8 | |
3548 | * | |
3549 | * 0000 0000 | |
3550 | */ | |
3551 | val = 0x00; | |
3552 | if (info->params.flags & HDLC_FLAG_AUTO_DCD) | |
3553 | val |= BIT5; | |
3554 | write_reg(info, CHA + XBCH, val); | |
3555 | enable_auxclk(info); | |
3556 | if (info->params.loopback || info->testing_irq) | |
3557 | loopback_enable(info); | |
3558 | if (info->params.flags & HDLC_FLAG_AUTO_CTS) | |
3559 | { | |
3560 | irq_enable(info, CHB, IRQ_CTS); | |
3561 | /* PVR[3] 1=AUTO CTS active */ | |
3562 | set_reg_bits(info, CHA + PVR, BIT3); | |
3563 | } else | |
3564 | clear_reg_bits(info, CHA + PVR, BIT3); | |
3565 | ||
3566 | irq_enable(info, CHA, | |
3567 | IRQ_RXEOM + IRQ_RXFIFO + IRQ_ALLSENT + | |
3568 | IRQ_UNDERRUN + IRQ_TXFIFO); | |
3569 | issue_command(info, CHA, CMD_TXRESET + CMD_RXRESET); | |
3570 | wait_command_complete(info, CHA); | |
3571 | read_reg16(info, CHA + ISR); /* clear pending IRQs */ | |
3572 | ||
3573 | /* Master clock mode enabled above to allow reset commands | |
3574 | * to complete even if no data clocks are present. | |
3575 | * | |
3576 | * Disable master clock mode for normal communications because | |
3577 | * V3.2 of the ESCC2 has a bug that prevents the transmit all sent | |
3578 | * IRQ when in master clock mode. | |
3579 | * | |
3580 | * Leave master clock mode enabled for IRQ test because the | |
3581 | * timer IRQ used by the test can only happen in master clock mode. | |
3582 | */ | |
3583 | if (!info->testing_irq) | |
3584 | clear_reg_bits(info, CHA + CCR0, BIT6); | |
3585 | ||
3586 | tx_set_idle(info); | |
3587 | ||
3588 | tx_stop(info); | |
3589 | rx_stop(info); | |
3590 | } | |
3591 | ||
3592 | void rx_stop(MGSLPC_INFO *info) | |
3593 | { | |
3594 | if (debug_level >= DEBUG_LEVEL_ISR) | |
3595 | printk("%s(%d):rx_stop(%s)\n", | |
3596 | __FILE__,__LINE__, info->device_name ); | |
3597 | ||
3598 | /* MODE:03 RAC Receiver Active, 0=inactive */ | |
3599 | clear_reg_bits(info, CHA + MODE, BIT3); | |
3600 | ||
3601 | info->rx_enabled = 0; | |
3602 | info->rx_overflow = 0; | |
3603 | } | |
3604 | ||
3605 | void rx_start(MGSLPC_INFO *info) | |
3606 | { | |
3607 | if (debug_level >= DEBUG_LEVEL_ISR) | |
3608 | printk("%s(%d):rx_start(%s)\n", | |
3609 | __FILE__,__LINE__, info->device_name ); | |
3610 | ||
3611 | rx_reset_buffers(info); | |
3612 | info->rx_enabled = 0; | |
3613 | info->rx_overflow = 0; | |
3614 | ||
3615 | /* MODE:03 RAC Receiver Active, 1=active */ | |
3616 | set_reg_bits(info, CHA + MODE, BIT3); | |
3617 | ||
3618 | info->rx_enabled = 1; | |
3619 | } | |
3620 | ||
3621 | void tx_start(MGSLPC_INFO *info) | |
3622 | { | |
3623 | if (debug_level >= DEBUG_LEVEL_ISR) | |
3624 | printk("%s(%d):tx_start(%s)\n", | |
3625 | __FILE__,__LINE__, info->device_name ); | |
3626 | ||
3627 | if (info->tx_count) { | |
3628 | /* If auto RTS enabled and RTS is inactive, then assert */ | |
3629 | /* RTS and set a flag indicating that the driver should */ | |
3630 | /* negate RTS when the transmission completes. */ | |
3631 | info->drop_rts_on_tx_done = 0; | |
3632 | ||
3633 | if (info->params.flags & HDLC_FLAG_AUTO_RTS) { | |
3634 | get_signals(info); | |
3635 | if (!(info->serial_signals & SerialSignal_RTS)) { | |
3636 | info->serial_signals |= SerialSignal_RTS; | |
3637 | set_signals(info); | |
3638 | info->drop_rts_on_tx_done = 1; | |
3639 | } | |
3640 | } | |
3641 | ||
3642 | if (info->params.mode == MGSL_MODE_ASYNC) { | |
3643 | if (!info->tx_active) { | |
3644 | info->tx_active = 1; | |
3645 | tx_ready(info); | |
3646 | } | |
3647 | } else { | |
3648 | info->tx_active = 1; | |
3649 | tx_ready(info); | |
3650 | info->tx_timer.expires = jiffies + msecs_to_jiffies(5000); | |
3651 | add_timer(&info->tx_timer); | |
3652 | } | |
3653 | } | |
3654 | ||
3655 | if (!info->tx_enabled) | |
3656 | info->tx_enabled = 1; | |
3657 | } | |
3658 | ||
3659 | void tx_stop(MGSLPC_INFO *info) | |
3660 | { | |
3661 | if (debug_level >= DEBUG_LEVEL_ISR) | |
3662 | printk("%s(%d):tx_stop(%s)\n", | |
3663 | __FILE__,__LINE__, info->device_name ); | |
3664 | ||
3665 | del_timer(&info->tx_timer); | |
3666 | ||
3667 | info->tx_enabled = 0; | |
3668 | info->tx_active = 0; | |
3669 | } | |
3670 | ||
3671 | /* Reset the adapter to a known state and prepare it for further use. | |
3672 | */ | |
3673 | void reset_device(MGSLPC_INFO *info) | |
3674 | { | |
3675 | /* power up both channels (set BIT7) */ | |
3676 | write_reg(info, CHA + CCR0, 0x80); | |
3677 | write_reg(info, CHB + CCR0, 0x80); | |
3678 | write_reg(info, CHA + MODE, 0); | |
3679 | write_reg(info, CHB + MODE, 0); | |
3680 | ||
3681 | /* disable all interrupts */ | |
3682 | irq_disable(info, CHA, 0xffff); | |
3683 | irq_disable(info, CHB, 0xffff); | |
3684 | port_irq_disable(info, 0xff); | |
3685 | ||
3686 | /* PCR Port Configuration Register | |
3687 | * | |
3688 | * 07..04 DEC[3..0] Serial I/F select outputs | |
3689 | * 03 output, 1=AUTO CTS control enabled | |
3690 | * 02 RI Ring Indicator input 0=active | |
3691 | * 01 DSR input 0=active | |
3692 | * 00 DTR output 0=active | |
3693 | * | |
3694 | * 0000 0110 | |
3695 | */ | |
3696 | write_reg(info, PCR, 0x06); | |
3697 | ||
3698 | /* PVR Port Value Register | |
3699 | * | |
3700 | * 07..04 DEC[3..0] Serial I/F select (0000=disabled) | |
3701 | * 03 AUTO CTS output 1=enabled | |
3702 | * 02 RI Ring Indicator input | |
3703 | * 01 DSR input | |
3704 | * 00 DTR output (1=inactive) | |
3705 | * | |
3706 | * 0000 0001 | |
3707 | */ | |
3708 | // write_reg(info, PVR, PVR_DTR); | |
3709 | ||
3710 | /* IPC Interrupt Port Configuration | |
3711 | * | |
3712 | * 07 VIS 1=Masked interrupts visible | |
3713 | * 06..05 Reserved, 0 | |
3714 | * 04..03 SLA Slave address, 00 ignored | |
3715 | * 02 CASM Cascading Mode, 1=daisy chain | |
3716 | * 01..00 IC[1..0] Interrupt Config, 01=push-pull output, active low | |
3717 | * | |
3718 | * 0000 0101 | |
3719 | */ | |
3720 | write_reg(info, IPC, 0x05); | |
3721 | } | |
3722 | ||
3723 | void async_mode(MGSLPC_INFO *info) | |
3724 | { | |
3725 | unsigned char val; | |
3726 | ||
3727 | /* disable all interrupts */ | |
3728 | irq_disable(info, CHA, 0xffff); | |
3729 | irq_disable(info, CHB, 0xffff); | |
3730 | port_irq_disable(info, 0xff); | |
3731 | ||
3732 | /* MODE | |
3733 | * | |
3734 | * 07 Reserved, 0 | |
3735 | * 06 FRTS RTS State, 0=active | |
3736 | * 05 FCTS Flow Control on CTS | |
3737 | * 04 FLON Flow Control Enable | |
3738 | * 03 RAC Receiver Active, 0 = inactive | |
3739 | * 02 RTS 0=Auto RTS, 1=manual RTS | |
3740 | * 01 TRS Timer Resolution, 1=512 | |
3741 | * 00 TLP Test Loop, 0 = no loop | |
3742 | * | |
3743 | * 0000 0110 | |
3744 | */ | |
3745 | val = 0x06; | |
3746 | if (info->params.loopback) | |
3747 | val |= BIT0; | |
3748 | ||
3749 | /* preserve RTS state */ | |
3750 | if (!(info->serial_signals & SerialSignal_RTS)) | |
3751 | val |= BIT6; | |
3752 | write_reg(info, CHA + MODE, val); | |
3753 | ||
3754 | /* CCR0 | |
3755 | * | |
3756 | * 07 PU Power Up, 1=active, 0=power down | |
3757 | * 06 MCE Master Clock Enable, 1=enabled | |
3758 | * 05 Reserved, 0 | |
3759 | * 04..02 SC[2..0] Encoding, 000=NRZ | |
3760 | * 01..00 SM[1..0] Serial Mode, 11=Async | |
3761 | * | |
3762 | * 1000 0011 | |
3763 | */ | |
3764 | write_reg(info, CHA + CCR0, 0x83); | |
3765 | ||
3766 | /* CCR1 | |
3767 | * | |
3768 | * 07..05 Reserved, 0 | |
3769 | * 04 ODS Output Driver Select, 1=TxD is push-pull output | |
3770 | * 03 BCR Bit Clock Rate, 1=16x | |
3771 | * 02..00 CM[2..0] Clock Mode, 111=BRG | |
3772 | * | |
3773 | * 0001 1111 | |
3774 | */ | |
3775 | write_reg(info, CHA + CCR1, 0x1f); | |
3776 | ||
3777 | /* CCR2 (channel A) | |
3778 | * | |
3779 | * 07..06 BGR[9..8] Baud rate bits 9..8 | |
3780 | * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value | |
3781 | * 04 SSEL Clock source select, 1=submode b | |
3782 | * 03 TOE 0=TxCLK is input, 0=TxCLK is input | |
3783 | * 02 RWX Read/Write Exchange 0=disabled | |
3784 | * 01 Reserved, 0 | |
3785 | * 00 DIV, data inversion 0=disabled, 1=enabled | |
3786 | * | |
3787 | * 0001 0000 | |
3788 | */ | |
3789 | write_reg(info, CHA + CCR2, 0x10); | |
3790 | ||
3791 | /* CCR3 | |
3792 | * | |
3793 | * 07..01 Reserved, 0 | |
3794 | * 00 PSD DPLL Phase Shift Disable | |
3795 | * | |
3796 | * 0000 0000 | |
3797 | */ | |
3798 | write_reg(info, CHA + CCR3, 0); | |
3799 | ||
3800 | /* CCR4 | |
3801 | * | |
3802 | * 07 MCK4 Master Clock Divide by 4, 1=enabled | |
3803 | * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled | |
3804 | * 05 TST1 Test Pin, 0=normal operation | |
3805 | * 04 ICD Ivert Carrier Detect, 1=enabled (active low) | |
3806 | * 03..00 Reserved, must be 0 | |
3807 | * | |
3808 | * 0101 0000 | |
3809 | */ | |
3810 | write_reg(info, CHA + CCR4, 0x50); | |
3811 | mgslpc_set_rate(info, CHA, info->params.data_rate * 16); | |
3812 | ||
3813 | /* DAFO Data Format | |
3814 | * | |
3815 | * 07 Reserved, 0 | |
3816 | * 06 XBRK transmit break, 0=normal operation | |
3817 | * 05 Stop bits (0=1, 1=2) | |
3818 | * 04..03 PAR[1..0] Parity (01=odd, 10=even) | |
3819 | * 02 PAREN Parity Enable | |
3820 | * 01..00 CHL[1..0] Character Length (00=8, 01=7) | |
3821 | * | |
3822 | */ | |
3823 | val = 0x00; | |
3824 | if (info->params.data_bits != 8) | |
3825 | val |= BIT0; /* 7 bits */ | |
3826 | if (info->params.stop_bits != 1) | |
3827 | val |= BIT5; | |
3828 | if (info->params.parity != ASYNC_PARITY_NONE) | |
3829 | { | |
3830 | val |= BIT2; /* Parity enable */ | |
3831 | if (info->params.parity == ASYNC_PARITY_ODD) | |
3832 | val |= BIT3; | |
3833 | else | |
3834 | val |= BIT4; | |
3835 | } | |
3836 | write_reg(info, CHA + DAFO, val); | |
3837 | ||
3838 | /* RFC Rx FIFO Control | |
3839 | * | |
3840 | * 07 Reserved, 0 | |
3841 | * 06 DPS, 1=parity bit not stored in data byte | |
3842 | * 05 DXS, 0=all data stored in FIFO (including XON/XOFF) | |
3843 | * 04 RFDF Rx FIFO Data Format, 1=status byte stored in FIFO | |
3844 | * 03..02 RFTH[1..0], rx threshold, 11=16 status + 16 data byte | |
3845 | * 01 Reserved, 0 | |
3846 | * 00 TCDE Terminate Char Detect Enable, 0=disabled | |
3847 | * | |
3848 | * 0101 1100 | |
3849 | */ | |
3850 | write_reg(info, CHA + RFC, 0x5c); | |
3851 | ||
3852 | /* RLCR Receive length check register | |
3853 | * | |
3854 | * Max frame length = (RL + 1) * 32 | |
3855 | */ | |
3856 | write_reg(info, CHA + RLCR, 0); | |
3857 | ||
3858 | /* XBCH Transmit Byte Count High | |
3859 | * | |
3860 | * 07 DMA mode, 0 = interrupt driven | |
3861 | * 06 NRM, 0=ABM (ignored) | |
3862 | * 05 CAS Carrier Auto Start | |
3863 | * 04 XC Transmit Continuously (ignored) | |
3864 | * 03..00 XBC[10..8] Transmit byte count bits 10..8 | |
3865 | * | |
3866 | * 0000 0000 | |
3867 | */ | |
3868 | val = 0x00; | |
3869 | if (info->params.flags & HDLC_FLAG_AUTO_DCD) | |
3870 | val |= BIT5; | |
3871 | write_reg(info, CHA + XBCH, val); | |
3872 | if (info->params.flags & HDLC_FLAG_AUTO_CTS) | |
3873 | irq_enable(info, CHA, IRQ_CTS); | |
3874 | ||
3875 | /* MODE:03 RAC Receiver Active, 1=active */ | |
3876 | set_reg_bits(info, CHA + MODE, BIT3); | |
3877 | enable_auxclk(info); | |
3878 | if (info->params.flags & HDLC_FLAG_AUTO_CTS) { | |
3879 | irq_enable(info, CHB, IRQ_CTS); | |
3880 | /* PVR[3] 1=AUTO CTS active */ | |
3881 | set_reg_bits(info, CHA + PVR, BIT3); | |
3882 | } else | |
3883 | clear_reg_bits(info, CHA + PVR, BIT3); | |
3884 | irq_enable(info, CHA, | |
3885 | IRQ_RXEOM + IRQ_RXFIFO + IRQ_BREAK_ON + IRQ_RXTIME + | |
3886 | IRQ_ALLSENT + IRQ_TXFIFO); | |
3887 | issue_command(info, CHA, CMD_TXRESET + CMD_RXRESET); | |
3888 | wait_command_complete(info, CHA); | |
3889 | read_reg16(info, CHA + ISR); /* clear pending IRQs */ | |
3890 | } | |
3891 | ||
3892 | /* Set the HDLC idle mode for the transmitter. | |
3893 | */ | |
3894 | void tx_set_idle(MGSLPC_INFO *info) | |
3895 | { | |
3896 | /* Note: ESCC2 only supports flags and one idle modes */ | |
3897 | if (info->idle_mode == HDLC_TXIDLE_FLAGS) | |
3898 | set_reg_bits(info, CHA + CCR1, BIT3); | |
3899 | else | |
3900 | clear_reg_bits(info, CHA + CCR1, BIT3); | |
3901 | } | |
3902 | ||
3903 | /* get state of the V24 status (input) signals. | |
3904 | */ | |
3905 | void get_signals(MGSLPC_INFO *info) | |
3906 | { | |
3907 | unsigned char status = 0; | |
3908 | ||
3909 | /* preserve DTR and RTS */ | |
3910 | info->serial_signals &= SerialSignal_DTR + SerialSignal_RTS; | |
3911 | ||
3912 | if (read_reg(info, CHB + VSTR) & BIT7) | |
3913 | info->serial_signals |= SerialSignal_DCD; | |
3914 | if (read_reg(info, CHB + STAR) & BIT1) | |
3915 | info->serial_signals |= SerialSignal_CTS; | |
3916 | ||
3917 | status = read_reg(info, CHA + PVR); | |
3918 | if (!(status & PVR_RI)) | |
3919 | info->serial_signals |= SerialSignal_RI; | |
3920 | if (!(status & PVR_DSR)) | |
3921 | info->serial_signals |= SerialSignal_DSR; | |
3922 | } | |
3923 | ||
3924 | /* Set the state of DTR and RTS based on contents of | |
3925 | * serial_signals member of device extension. | |
3926 | */ | |
3927 | void set_signals(MGSLPC_INFO *info) | |
3928 | { | |
3929 | unsigned char val; | |
3930 | ||
3931 | val = read_reg(info, CHA + MODE); | |
3932 | if (info->params.mode == MGSL_MODE_ASYNC) { | |
3933 | if (info->serial_signals & SerialSignal_RTS) | |
3934 | val &= ~BIT6; | |
3935 | else | |
3936 | val |= BIT6; | |
3937 | } else { | |
3938 | if (info->serial_signals & SerialSignal_RTS) | |
3939 | val |= BIT2; | |
3940 | else | |
3941 | val &= ~BIT2; | |
3942 | } | |
3943 | write_reg(info, CHA + MODE, val); | |
3944 | ||
3945 | if (info->serial_signals & SerialSignal_DTR) | |
3946 | clear_reg_bits(info, CHA + PVR, PVR_DTR); | |
3947 | else | |
3948 | set_reg_bits(info, CHA + PVR, PVR_DTR); | |
3949 | } | |
3950 | ||
3951 | void rx_reset_buffers(MGSLPC_INFO *info) | |
3952 | { | |
3953 | RXBUF *buf; | |
3954 | int i; | |
3955 | ||
3956 | info->rx_put = 0; | |
3957 | info->rx_get = 0; | |
3958 | info->rx_frame_count = 0; | |
3959 | for (i=0 ; i < info->rx_buf_count ; i++) { | |
3960 | buf = (RXBUF*)(info->rx_buf + (i * info->rx_buf_size)); | |
3961 | buf->status = buf->count = 0; | |
3962 | } | |
3963 | } | |
3964 | ||
3965 | /* Attempt to return a received HDLC frame | |
3966 | * Only frames received without errors are returned. | |
3967 | * | |
3968 | * Returns 1 if frame returned, otherwise 0 | |
3969 | */ | |
3970 | int rx_get_frame(MGSLPC_INFO *info) | |
3971 | { | |
3972 | unsigned short status; | |
3973 | RXBUF *buf; | |
3974 | unsigned int framesize = 0; | |
3975 | unsigned long flags; | |
3976 | struct tty_struct *tty = info->tty; | |
3977 | int return_frame = 0; | |
3978 | ||
3979 | if (info->rx_frame_count == 0) | |
3980 | return 0; | |
3981 | ||
3982 | buf = (RXBUF*)(info->rx_buf + (info->rx_get * info->rx_buf_size)); | |
3983 | ||
3984 | status = buf->status; | |
3985 | ||
3986 | /* 07 VFR 1=valid frame | |
3987 | * 06 RDO 1=data overrun | |
3988 | * 05 CRC 1=OK, 0=error | |
3989 | * 04 RAB 1=frame aborted | |
3990 | */ | |
3991 | if ((status & 0xf0) != 0xA0) { | |
3992 | if (!(status & BIT7) || (status & BIT4)) | |
3993 | info->icount.rxabort++; | |
3994 | else if (status & BIT6) | |
3995 | info->icount.rxover++; | |
3996 | else if (!(status & BIT5)) { | |
3997 | info->icount.rxcrc++; | |
3998 | if (info->params.crc_type & HDLC_CRC_RETURN_EX) | |
3999 | return_frame = 1; | |
4000 | } | |
4001 | framesize = 0; | |
4002 | #ifdef CONFIG_HDLC | |
4003 | { | |
4004 | struct net_device_stats *stats = hdlc_stats(info->netdev); | |
4005 | stats->rx_errors++; | |
4006 | stats->rx_frame_errors++; | |
4007 | } | |
4008 | #endif | |
4009 | } else | |
4010 | return_frame = 1; | |
4011 | ||
4012 | if (return_frame) | |
4013 | framesize = buf->count; | |
4014 | ||
4015 | if (debug_level >= DEBUG_LEVEL_BH) | |
4016 | printk("%s(%d):rx_get_frame(%s) status=%04X size=%d\n", | |
4017 | __FILE__,__LINE__,info->device_name,status,framesize); | |
4018 | ||
4019 | if (debug_level >= DEBUG_LEVEL_DATA) | |
4020 | trace_block(info, buf->data, framesize, 0); | |
4021 | ||
4022 | if (framesize) { | |
4023 | if ((info->params.crc_type & HDLC_CRC_RETURN_EX && | |
4024 | framesize+1 > info->max_frame_size) || | |
4025 | framesize > info->max_frame_size) | |
4026 | info->icount.rxlong++; | |
4027 | else { | |
4028 | if (status & BIT5) | |
4029 | info->icount.rxok++; | |
4030 | ||
4031 | if (info->params.crc_type & HDLC_CRC_RETURN_EX) { | |
4032 | *(buf->data + framesize) = status & BIT5 ? RX_OK:RX_CRC_ERROR; | |
4033 | ++framesize; | |
4034 | } | |
4035 | ||
4036 | #ifdef CONFIG_HDLC | |
4037 | if (info->netcount) | |
4038 | hdlcdev_rx(info, buf->data, framesize); | |
4039 | else | |
4040 | #endif | |
4041 | ldisc_receive_buf(tty, buf->data, info->flag_buf, framesize); | |
4042 | } | |
4043 | } | |
4044 | ||
4045 | spin_lock_irqsave(&info->lock,flags); | |
4046 | buf->status = buf->count = 0; | |
4047 | info->rx_frame_count--; | |
4048 | info->rx_get++; | |
4049 | if (info->rx_get >= info->rx_buf_count) | |
4050 | info->rx_get = 0; | |
4051 | spin_unlock_irqrestore(&info->lock,flags); | |
4052 | ||
4053 | return 1; | |
4054 | } | |
4055 | ||
4056 | BOOLEAN register_test(MGSLPC_INFO *info) | |
4057 | { | |
4058 | static unsigned char patterns[] = | |
4059 | { 0x00, 0xff, 0xaa, 0x55, 0x69, 0x96, 0x0f }; | |
4060 | static unsigned int count = sizeof(patterns) / sizeof(patterns[0]); | |
4061 | unsigned int i; | |
4062 | BOOLEAN rc = TRUE; | |
4063 | unsigned long flags; | |
4064 | ||
4065 | spin_lock_irqsave(&info->lock,flags); | |
4066 | reset_device(info); | |
4067 | ||
4068 | for (i = 0; i < count; i++) { | |
4069 | write_reg(info, XAD1, patterns[i]); | |
4070 | write_reg(info, XAD2, patterns[(i + 1) % count]); | |
4071 | if ((read_reg(info, XAD1) != patterns[i]) || | |
4072 | (read_reg(info, XAD2) != patterns[(i + 1) % count])) { | |
4073 | rc = FALSE; | |
4074 | break; | |
4075 | } | |
4076 | } | |
4077 | ||
4078 | spin_unlock_irqrestore(&info->lock,flags); | |
4079 | return rc; | |
4080 | } | |
4081 | ||
4082 | BOOLEAN irq_test(MGSLPC_INFO *info) | |
4083 | { | |
4084 | unsigned long end_time; | |
4085 | unsigned long flags; | |
4086 | ||
4087 | spin_lock_irqsave(&info->lock,flags); | |
4088 | reset_device(info); | |
4089 | ||
4090 | info->testing_irq = TRUE; | |
4091 | hdlc_mode(info); | |
4092 | ||
4093 | info->irq_occurred = FALSE; | |
4094 | ||
4095 | /* init hdlc mode */ | |
4096 | ||
4097 | irq_enable(info, CHA, IRQ_TIMER); | |
4098 | write_reg(info, CHA + TIMR, 0); /* 512 cycles */ | |
4099 | issue_command(info, CHA, CMD_START_TIMER); | |
4100 | ||
4101 | spin_unlock_irqrestore(&info->lock,flags); | |
4102 | ||
4103 | end_time=100; | |
4104 | while(end_time-- && !info->irq_occurred) { | |
4105 | msleep_interruptible(10); | |
4106 | } | |
4107 | ||
4108 | info->testing_irq = FALSE; | |
4109 | ||
4110 | spin_lock_irqsave(&info->lock,flags); | |
4111 | reset_device(info); | |
4112 | spin_unlock_irqrestore(&info->lock,flags); | |
4113 | ||
4114 | return info->irq_occurred ? TRUE : FALSE; | |
4115 | } | |
4116 | ||
4117 | int adapter_test(MGSLPC_INFO *info) | |
4118 | { | |
4119 | if (!register_test(info)) { | |
4120 | info->init_error = DiagStatus_AddressFailure; | |
4121 | printk( "%s(%d):Register test failure for device %s Addr=%04X\n", | |
4122 | __FILE__,__LINE__,info->device_name, (unsigned short)(info->io_base) ); | |
4123 | return -ENODEV; | |
4124 | } | |
4125 | ||
4126 | if (!irq_test(info)) { | |
4127 | info->init_error = DiagStatus_IrqFailure; | |
4128 | printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n", | |
4129 | __FILE__,__LINE__,info->device_name, (unsigned short)(info->irq_level) ); | |
4130 | return -ENODEV; | |
4131 | } | |
4132 | ||
4133 | if (debug_level >= DEBUG_LEVEL_INFO) | |
4134 | printk("%s(%d):device %s passed diagnostics\n", | |
4135 | __FILE__,__LINE__,info->device_name); | |
4136 | return 0; | |
4137 | } | |
4138 | ||
4139 | void trace_block(MGSLPC_INFO *info,const char* data, int count, int xmit) | |
4140 | { | |
4141 | int i; | |
4142 | int linecount; | |
4143 | if (xmit) | |
4144 | printk("%s tx data:\n",info->device_name); | |
4145 | else | |
4146 | printk("%s rx data:\n",info->device_name); | |
4147 | ||
4148 | while(count) { | |
4149 | if (count > 16) | |
4150 | linecount = 16; | |
4151 | else | |
4152 | linecount = count; | |
4153 | ||
4154 | for(i=0;i<linecount;i++) | |
4155 | printk("%02X ",(unsigned char)data[i]); | |
4156 | for(;i<17;i++) | |
4157 | printk(" "); | |
4158 | for(i=0;i<linecount;i++) { | |
4159 | if (data[i]>=040 && data[i]<=0176) | |
4160 | printk("%c",data[i]); | |
4161 | else | |
4162 | printk("."); | |
4163 | } | |
4164 | printk("\n"); | |
4165 | ||
4166 | data += linecount; | |
4167 | count -= linecount; | |
4168 | } | |
4169 | } | |
4170 | ||
4171 | /* HDLC frame time out | |
4172 | * update stats and do tx completion processing | |
4173 | */ | |
4174 | void tx_timeout(unsigned long context) | |
4175 | { | |
4176 | MGSLPC_INFO *info = (MGSLPC_INFO*)context; | |
4177 | unsigned long flags; | |
4178 | ||
4179 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
4180 | printk( "%s(%d):tx_timeout(%s)\n", | |
4181 | __FILE__,__LINE__,info->device_name); | |
4182 | if(info->tx_active && | |
4183 | info->params.mode == MGSL_MODE_HDLC) { | |
4184 | info->icount.txtimeout++; | |
4185 | } | |
4186 | spin_lock_irqsave(&info->lock,flags); | |
4187 | info->tx_active = 0; | |
4188 | info->tx_count = info->tx_put = info->tx_get = 0; | |
4189 | ||
4190 | spin_unlock_irqrestore(&info->lock,flags); | |
4191 | ||
4192 | #ifdef CONFIG_HDLC | |
4193 | if (info->netcount) | |
4194 | hdlcdev_tx_done(info); | |
4195 | else | |
4196 | #endif | |
4197 | bh_transmit(info); | |
4198 | } | |
4199 | ||
4200 | #ifdef CONFIG_HDLC | |
4201 | ||
4202 | /** | |
4203 | * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.) | |
4204 | * set encoding and frame check sequence (FCS) options | |
4205 | * | |
4206 | * dev pointer to network device structure | |
4207 | * encoding serial encoding setting | |
4208 | * parity FCS setting | |
4209 | * | |
4210 | * returns 0 if success, otherwise error code | |
4211 | */ | |
4212 | static int hdlcdev_attach(struct net_device *dev, unsigned short encoding, | |
4213 | unsigned short parity) | |
4214 | { | |
4215 | MGSLPC_INFO *info = dev_to_port(dev); | |
4216 | unsigned char new_encoding; | |
4217 | unsigned short new_crctype; | |
4218 | ||
4219 | /* return error if TTY interface open */ | |
4220 | if (info->count) | |
4221 | return -EBUSY; | |
4222 | ||
4223 | switch (encoding) | |
4224 | { | |
4225 | case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break; | |
4226 | case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break; | |
4227 | case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break; | |
4228 | case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break; | |
4229 | case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break; | |
4230 | default: return -EINVAL; | |
4231 | } | |
4232 | ||
4233 | switch (parity) | |
4234 | { | |
4235 | case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break; | |
4236 | case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break; | |
4237 | case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break; | |
4238 | default: return -EINVAL; | |
4239 | } | |
4240 | ||
4241 | info->params.encoding = new_encoding; | |
4242 | info->params.crc_type = new_crctype;; | |
4243 | ||
4244 | /* if network interface up, reprogram hardware */ | |
4245 | if (info->netcount) | |
4246 | mgslpc_program_hw(info); | |
4247 | ||
4248 | return 0; | |
4249 | } | |
4250 | ||
4251 | /** | |
4252 | * called by generic HDLC layer to send frame | |
4253 | * | |
4254 | * skb socket buffer containing HDLC frame | |
4255 | * dev pointer to network device structure | |
4256 | * | |
4257 | * returns 0 if success, otherwise error code | |
4258 | */ | |
4259 | static int hdlcdev_xmit(struct sk_buff *skb, struct net_device *dev) | |
4260 | { | |
4261 | MGSLPC_INFO *info = dev_to_port(dev); | |
4262 | struct net_device_stats *stats = hdlc_stats(dev); | |
4263 | unsigned long flags; | |
4264 | ||
4265 | if (debug_level >= DEBUG_LEVEL_INFO) | |
4266 | printk(KERN_INFO "%s:hdlc_xmit(%s)\n",__FILE__,dev->name); | |
4267 | ||
4268 | /* stop sending until this frame completes */ | |
4269 | netif_stop_queue(dev); | |
4270 | ||
4271 | /* copy data to device buffers */ | |
4272 | memcpy(info->tx_buf, skb->data, skb->len); | |
4273 | info->tx_get = 0; | |
4274 | info->tx_put = info->tx_count = skb->len; | |
4275 | ||
4276 | /* update network statistics */ | |
4277 | stats->tx_packets++; | |
4278 | stats->tx_bytes += skb->len; | |
4279 | ||
4280 | /* done with socket buffer, so free it */ | |
4281 | dev_kfree_skb(skb); | |
4282 | ||
4283 | /* save start time for transmit timeout detection */ | |
4284 | dev->trans_start = jiffies; | |
4285 | ||
4286 | /* start hardware transmitter if necessary */ | |
4287 | spin_lock_irqsave(&info->lock,flags); | |
4288 | if (!info->tx_active) | |
4289 | tx_start(info); | |
4290 | spin_unlock_irqrestore(&info->lock,flags); | |
4291 | ||
4292 | return 0; | |
4293 | } | |
4294 | ||
4295 | /** | |
4296 | * called by network layer when interface enabled | |
4297 | * claim resources and initialize hardware | |
4298 | * | |
4299 | * dev pointer to network device structure | |
4300 | * | |
4301 | * returns 0 if success, otherwise error code | |
4302 | */ | |
4303 | static int hdlcdev_open(struct net_device *dev) | |
4304 | { | |
4305 | MGSLPC_INFO *info = dev_to_port(dev); | |
4306 | int rc; | |
4307 | unsigned long flags; | |
4308 | ||
4309 | if (debug_level >= DEBUG_LEVEL_INFO) | |
4310 | printk("%s:hdlcdev_open(%s)\n",__FILE__,dev->name); | |
4311 | ||
4312 | /* generic HDLC layer open processing */ | |
4313 | if ((rc = hdlc_open(dev))) | |
4314 | return rc; | |
4315 | ||
4316 | /* arbitrate between network and tty opens */ | |
4317 | spin_lock_irqsave(&info->netlock, flags); | |
4318 | if (info->count != 0 || info->netcount != 0) { | |
4319 | printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name); | |
4320 | spin_unlock_irqrestore(&info->netlock, flags); | |
4321 | return -EBUSY; | |
4322 | } | |
4323 | info->netcount=1; | |
4324 | spin_unlock_irqrestore(&info->netlock, flags); | |
4325 | ||
4326 | /* claim resources and init adapter */ | |
4327 | if ((rc = startup(info)) != 0) { | |
4328 | spin_lock_irqsave(&info->netlock, flags); | |
4329 | info->netcount=0; | |
4330 | spin_unlock_irqrestore(&info->netlock, flags); | |
4331 | return rc; | |
4332 | } | |
4333 | ||
4334 | /* assert DTR and RTS, apply hardware settings */ | |
4335 | info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; | |
4336 | mgslpc_program_hw(info); | |
4337 | ||
4338 | /* enable network layer transmit */ | |
4339 | dev->trans_start = jiffies; | |
4340 | netif_start_queue(dev); | |
4341 | ||
4342 | /* inform generic HDLC layer of current DCD status */ | |
4343 | spin_lock_irqsave(&info->lock, flags); | |
4344 | get_signals(info); | |
4345 | spin_unlock_irqrestore(&info->lock, flags); | |
4346 | hdlc_set_carrier(info->serial_signals & SerialSignal_DCD, dev); | |
4347 | ||
4348 | return 0; | |
4349 | } | |
4350 | ||
4351 | /** | |
4352 | * called by network layer when interface is disabled | |
4353 | * shutdown hardware and release resources | |
4354 | * | |
4355 | * dev pointer to network device structure | |
4356 | * | |
4357 | * returns 0 if success, otherwise error code | |
4358 | */ | |
4359 | static int hdlcdev_close(struct net_device *dev) | |
4360 | { | |
4361 | MGSLPC_INFO *info = dev_to_port(dev); | |
4362 | unsigned long flags; | |
4363 | ||
4364 | if (debug_level >= DEBUG_LEVEL_INFO) | |
4365 | printk("%s:hdlcdev_close(%s)\n",__FILE__,dev->name); | |
4366 | ||
4367 | netif_stop_queue(dev); | |
4368 | ||
4369 | /* shutdown adapter and release resources */ | |
4370 | shutdown(info); | |
4371 | ||
4372 | hdlc_close(dev); | |
4373 | ||
4374 | spin_lock_irqsave(&info->netlock, flags); | |
4375 | info->netcount=0; | |
4376 | spin_unlock_irqrestore(&info->netlock, flags); | |
4377 | ||
4378 | return 0; | |
4379 | } | |
4380 | ||
4381 | /** | |
4382 | * called by network layer to process IOCTL call to network device | |
4383 | * | |
4384 | * dev pointer to network device structure | |
4385 | * ifr pointer to network interface request structure | |
4386 | * cmd IOCTL command code | |
4387 | * | |
4388 | * returns 0 if success, otherwise error code | |
4389 | */ | |
4390 | static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
4391 | { | |
4392 | const size_t size = sizeof(sync_serial_settings); | |
4393 | sync_serial_settings new_line; | |
4394 | sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync; | |
4395 | MGSLPC_INFO *info = dev_to_port(dev); | |
4396 | unsigned int flags; | |
4397 | ||
4398 | if (debug_level >= DEBUG_LEVEL_INFO) | |
4399 | printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name); | |
4400 | ||
4401 | /* return error if TTY interface open */ | |
4402 | if (info->count) | |
4403 | return -EBUSY; | |
4404 | ||
4405 | if (cmd != SIOCWANDEV) | |
4406 | return hdlc_ioctl(dev, ifr, cmd); | |
4407 | ||
4408 | switch(ifr->ifr_settings.type) { | |
4409 | case IF_GET_IFACE: /* return current sync_serial_settings */ | |
4410 | ||
4411 | ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL; | |
4412 | if (ifr->ifr_settings.size < size) { | |
4413 | ifr->ifr_settings.size = size; /* data size wanted */ | |
4414 | return -ENOBUFS; | |
4415 | } | |
4416 | ||
4417 | flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | | |
4418 | HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | | |
4419 | HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | | |
4420 | HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); | |
4421 | ||
4422 | switch (flags){ | |
4423 | case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break; | |
4424 | case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break; | |
4425 | case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break; | |
4426 | case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break; | |
4427 | default: new_line.clock_type = CLOCK_DEFAULT; | |
4428 | } | |
4429 | ||
4430 | new_line.clock_rate = info->params.clock_speed; | |
4431 | new_line.loopback = info->params.loopback ? 1:0; | |
4432 | ||
4433 | if (copy_to_user(line, &new_line, size)) | |
4434 | return -EFAULT; | |
4435 | return 0; | |
4436 | ||
4437 | case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */ | |
4438 | ||
4439 | if(!capable(CAP_NET_ADMIN)) | |
4440 | return -EPERM; | |
4441 | if (copy_from_user(&new_line, line, size)) | |
4442 | return -EFAULT; | |
4443 | ||
4444 | switch (new_line.clock_type) | |
4445 | { | |
4446 | case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break; | |
4447 | case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break; | |
4448 | case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break; | |
4449 | case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break; | |
4450 | case CLOCK_DEFAULT: flags = info->params.flags & | |
4451 | (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | | |
4452 | HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | | |
4453 | HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | | |
4454 | HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break; | |
4455 | default: return -EINVAL; | |
4456 | } | |
4457 | ||
4458 | if (new_line.loopback != 0 && new_line.loopback != 1) | |
4459 | return -EINVAL; | |
4460 | ||
4461 | info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | | |
4462 | HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | | |
4463 | HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | | |
4464 | HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); | |
4465 | info->params.flags |= flags; | |
4466 | ||
4467 | info->params.loopback = new_line.loopback; | |
4468 | ||
4469 | if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG)) | |
4470 | info->params.clock_speed = new_line.clock_rate; | |
4471 | else | |
4472 | info->params.clock_speed = 0; | |
4473 | ||
4474 | /* if network interface up, reprogram hardware */ | |
4475 | if (info->netcount) | |
4476 | mgslpc_program_hw(info); | |
4477 | return 0; | |
4478 | ||
4479 | default: | |
4480 | return hdlc_ioctl(dev, ifr, cmd); | |
4481 | } | |
4482 | } | |
4483 | ||
4484 | /** | |
4485 | * called by network layer when transmit timeout is detected | |
4486 | * | |
4487 | * dev pointer to network device structure | |
4488 | */ | |
4489 | static void hdlcdev_tx_timeout(struct net_device *dev) | |
4490 | { | |
4491 | MGSLPC_INFO *info = dev_to_port(dev); | |
4492 | struct net_device_stats *stats = hdlc_stats(dev); | |
4493 | unsigned long flags; | |
4494 | ||
4495 | if (debug_level >= DEBUG_LEVEL_INFO) | |
4496 | printk("hdlcdev_tx_timeout(%s)\n",dev->name); | |
4497 | ||
4498 | stats->tx_errors++; | |
4499 | stats->tx_aborted_errors++; | |
4500 | ||
4501 | spin_lock_irqsave(&info->lock,flags); | |
4502 | tx_stop(info); | |
4503 | spin_unlock_irqrestore(&info->lock,flags); | |
4504 | ||
4505 | netif_wake_queue(dev); | |
4506 | } | |
4507 | ||
4508 | /** | |
4509 | * called by device driver when transmit completes | |
4510 | * reenable network layer transmit if stopped | |
4511 | * | |
4512 | * info pointer to device instance information | |
4513 | */ | |
4514 | static void hdlcdev_tx_done(MGSLPC_INFO *info) | |
4515 | { | |
4516 | if (netif_queue_stopped(info->netdev)) | |
4517 | netif_wake_queue(info->netdev); | |
4518 | } | |
4519 | ||
4520 | /** | |
4521 | * called by device driver when frame received | |
4522 | * pass frame to network layer | |
4523 | * | |
4524 | * info pointer to device instance information | |
4525 | * buf pointer to buffer contianing frame data | |
4526 | * size count of data bytes in buf | |
4527 | */ | |
4528 | static void hdlcdev_rx(MGSLPC_INFO *info, char *buf, int size) | |
4529 | { | |
4530 | struct sk_buff *skb = dev_alloc_skb(size); | |
4531 | struct net_device *dev = info->netdev; | |
4532 | struct net_device_stats *stats = hdlc_stats(dev); | |
4533 | ||
4534 | if (debug_level >= DEBUG_LEVEL_INFO) | |
4535 | printk("hdlcdev_rx(%s)\n",dev->name); | |
4536 | ||
4537 | if (skb == NULL) { | |
4538 | printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n", dev->name); | |
4539 | stats->rx_dropped++; | |
4540 | return; | |
4541 | } | |
4542 | ||
4543 | memcpy(skb_put(skb, size),buf,size); | |
4544 | ||
4545 | skb->protocol = hdlc_type_trans(skb, info->netdev); | |
4546 | ||
4547 | stats->rx_packets++; | |
4548 | stats->rx_bytes += size; | |
4549 | ||
4550 | netif_rx(skb); | |
4551 | ||
4552 | info->netdev->last_rx = jiffies; | |
4553 | } | |
4554 | ||
4555 | /** | |
4556 | * called by device driver when adding device instance | |
4557 | * do generic HDLC initialization | |
4558 | * | |
4559 | * info pointer to device instance information | |
4560 | * | |
4561 | * returns 0 if success, otherwise error code | |
4562 | */ | |
4563 | static int hdlcdev_init(MGSLPC_INFO *info) | |
4564 | { | |
4565 | int rc; | |
4566 | struct net_device *dev; | |
4567 | hdlc_device *hdlc; | |
4568 | ||
4569 | /* allocate and initialize network and HDLC layer objects */ | |
4570 | ||
4571 | if (!(dev = alloc_hdlcdev(info))) { | |
4572 | printk(KERN_ERR "%s:hdlc device allocation failure\n",__FILE__); | |
4573 | return -ENOMEM; | |
4574 | } | |
4575 | ||
4576 | /* for network layer reporting purposes only */ | |
4577 | dev->base_addr = info->io_base; | |
4578 | dev->irq = info->irq_level; | |
4579 | ||
4580 | /* network layer callbacks and settings */ | |
4581 | dev->do_ioctl = hdlcdev_ioctl; | |
4582 | dev->open = hdlcdev_open; | |
4583 | dev->stop = hdlcdev_close; | |
4584 | dev->tx_timeout = hdlcdev_tx_timeout; | |
4585 | dev->watchdog_timeo = 10*HZ; | |
4586 | dev->tx_queue_len = 50; | |
4587 | ||
4588 | /* generic HDLC layer callbacks and settings */ | |
4589 | hdlc = dev_to_hdlc(dev); | |
4590 | hdlc->attach = hdlcdev_attach; | |
4591 | hdlc->xmit = hdlcdev_xmit; | |
4592 | ||
4593 | /* register objects with HDLC layer */ | |
4594 | if ((rc = register_hdlc_device(dev))) { | |
4595 | printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__); | |
4596 | free_netdev(dev); | |
4597 | return rc; | |
4598 | } | |
4599 | ||
4600 | info->netdev = dev; | |
4601 | return 0; | |
4602 | } | |
4603 | ||
4604 | /** | |
4605 | * called by device driver when removing device instance | |
4606 | * do generic HDLC cleanup | |
4607 | * | |
4608 | * info pointer to device instance information | |
4609 | */ | |
4610 | static void hdlcdev_exit(MGSLPC_INFO *info) | |
4611 | { | |
4612 | unregister_hdlc_device(info->netdev); | |
4613 | free_netdev(info->netdev); | |
4614 | info->netdev = NULL; | |
4615 | } | |
4616 | ||
4617 | #endif /* CONFIG_HDLC */ | |
4618 |