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Commit | Line | Data |
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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 | ||
1da177e4 LT |
38 | #include <linux/module.h> |
39 | #include <linux/errno.h> | |
40 | #include <linux/signal.h> | |
41 | #include <linux/sched.h> | |
42 | #include <linux/timer.h> | |
43 | #include <linux/time.h> | |
44 | #include <linux/interrupt.h> | |
1da177e4 LT |
45 | #include <linux/tty.h> |
46 | #include <linux/tty_flip.h> | |
47 | #include <linux/serial.h> | |
48 | #include <linux/major.h> | |
49 | #include <linux/string.h> | |
50 | #include <linux/fcntl.h> | |
51 | #include <linux/ptrace.h> | |
52 | #include <linux/ioport.h> | |
53 | #include <linux/mm.h> | |
87687144 | 54 | #include <linux/seq_file.h> |
1da177e4 LT |
55 | #include <linux/slab.h> |
56 | #include <linux/netdevice.h> | |
57 | #include <linux/vmalloc.h> | |
58 | #include <linux/init.h> | |
1da177e4 LT |
59 | #include <linux/delay.h> |
60 | #include <linux/ioctl.h> | |
3dd1247f | 61 | #include <linux/synclink.h> |
1da177e4 LT |
62 | |
63 | #include <asm/system.h> | |
64 | #include <asm/io.h> | |
65 | #include <asm/irq.h> | |
66 | #include <asm/dma.h> | |
67 | #include <linux/bitops.h> | |
68 | #include <asm/types.h> | |
69 | #include <linux/termios.h> | |
70 | #include <linux/workqueue.h> | |
71 | #include <linux/hdlc.h> | |
72 | ||
1da177e4 LT |
73 | #include <pcmcia/cs_types.h> |
74 | #include <pcmcia/cs.h> | |
75 | #include <pcmcia/cistpl.h> | |
76 | #include <pcmcia/cisreg.h> | |
77 | #include <pcmcia/ds.h> | |
78 | ||
af69c7f9 PF |
79 | #if defined(CONFIG_HDLC) || (defined(CONFIG_HDLC_MODULE) && defined(CONFIG_SYNCLINK_CS_MODULE)) |
80 | #define SYNCLINK_GENERIC_HDLC 1 | |
81 | #else | |
82 | #define SYNCLINK_GENERIC_HDLC 0 | |
1da177e4 LT |
83 | #endif |
84 | ||
85 | #define GET_USER(error,value,addr) error = get_user(value,addr) | |
86 | #define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0 | |
87 | #define PUT_USER(error,value,addr) error = put_user(value,addr) | |
88 | #define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0 | |
89 | ||
90 | #include <asm/uaccess.h> | |
91 | ||
1da177e4 LT |
92 | static MGSL_PARAMS default_params = { |
93 | MGSL_MODE_HDLC, /* unsigned long mode */ | |
94 | 0, /* unsigned char loopback; */ | |
95 | HDLC_FLAG_UNDERRUN_ABORT15, /* unsigned short flags; */ | |
96 | HDLC_ENCODING_NRZI_SPACE, /* unsigned char encoding; */ | |
97 | 0, /* unsigned long clock_speed; */ | |
98 | 0xff, /* unsigned char addr_filter; */ | |
99 | HDLC_CRC_16_CCITT, /* unsigned short crc_type; */ | |
100 | HDLC_PREAMBLE_LENGTH_8BITS, /* unsigned char preamble_length; */ | |
101 | HDLC_PREAMBLE_PATTERN_NONE, /* unsigned char preamble; */ | |
102 | 9600, /* unsigned long data_rate; */ | |
103 | 8, /* unsigned char data_bits; */ | |
104 | 1, /* unsigned char stop_bits; */ | |
105 | ASYNC_PARITY_NONE /* unsigned char parity; */ | |
106 | }; | |
107 | ||
108 | typedef struct | |
109 | { | |
110 | int count; | |
111 | unsigned char status; | |
112 | char data[1]; | |
113 | } RXBUF; | |
114 | ||
115 | /* The queue of BH actions to be performed */ | |
116 | ||
117 | #define BH_RECEIVE 1 | |
118 | #define BH_TRANSMIT 2 | |
119 | #define BH_STATUS 4 | |
120 | ||
121 | #define IO_PIN_SHUTDOWN_LIMIT 100 | |
122 | ||
123 | #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK)) | |
124 | ||
125 | struct _input_signal_events { | |
d12341f9 | 126 | int ri_up; |
1da177e4 LT |
127 | int ri_down; |
128 | int dsr_up; | |
129 | int dsr_down; | |
130 | int dcd_up; | |
131 | int dcd_down; | |
132 | int cts_up; | |
133 | int cts_down; | |
134 | }; | |
135 | ||
136 | ||
137 | /* | |
138 | * Device instance data structure | |
139 | */ | |
d12341f9 | 140 | |
1da177e4 | 141 | typedef struct _mgslpc_info { |
eeb46134 | 142 | struct tty_port port; |
1da177e4 LT |
143 | void *if_ptr; /* General purpose pointer (used by SPPP) */ |
144 | int magic; | |
1da177e4 | 145 | int line; |
d12341f9 | 146 | |
1da177e4 | 147 | struct mgsl_icount icount; |
d12341f9 | 148 | |
1da177e4 LT |
149 | int timeout; |
150 | int x_char; /* xon/xoff character */ | |
1da177e4 | 151 | unsigned char read_status_mask; |
d12341f9 | 152 | unsigned char ignore_status_mask; |
1da177e4 LT |
153 | |
154 | unsigned char *tx_buf; | |
155 | int tx_put; | |
156 | int tx_get; | |
157 | int tx_count; | |
158 | ||
159 | /* circular list of fixed length rx buffers */ | |
160 | ||
161 | unsigned char *rx_buf; /* memory allocated for all rx buffers */ | |
162 | int rx_buf_total_size; /* size of memory allocated for rx buffers */ | |
163 | int rx_put; /* index of next empty rx buffer */ | |
164 | int rx_get; /* index of next full rx buffer */ | |
165 | int rx_buf_size; /* size in bytes of single rx buffer */ | |
166 | int rx_buf_count; /* total number of rx buffers */ | |
167 | int rx_frame_count; /* number of full rx buffers */ | |
d12341f9 | 168 | |
1da177e4 LT |
169 | wait_queue_head_t status_event_wait_q; |
170 | wait_queue_head_t event_wait_q; | |
171 | struct timer_list tx_timer; /* HDLC transmit timeout timer */ | |
172 | struct _mgslpc_info *next_device; /* device list link */ | |
173 | ||
174 | unsigned short imra_value; | |
175 | unsigned short imrb_value; | |
176 | unsigned char pim_value; | |
177 | ||
178 | spinlock_t lock; | |
179 | struct work_struct task; /* task structure for scheduling bh */ | |
180 | ||
181 | u32 max_frame_size; | |
182 | ||
183 | u32 pending_bh; | |
184 | ||
0fab6de0 JP |
185 | bool bh_running; |
186 | bool bh_requested; | |
d12341f9 | 187 | |
1da177e4 LT |
188 | int dcd_chkcount; /* check counts to prevent */ |
189 | int cts_chkcount; /* too many IRQs if a signal */ | |
190 | int dsr_chkcount; /* is floating */ | |
191 | int ri_chkcount; | |
192 | ||
0fab6de0 JP |
193 | bool rx_enabled; |
194 | bool rx_overflow; | |
1da177e4 | 195 | |
0fab6de0 JP |
196 | bool tx_enabled; |
197 | bool tx_active; | |
198 | bool tx_aborting; | |
1da177e4 LT |
199 | u32 idle_mode; |
200 | ||
201 | int if_mode; /* serial interface selection (RS-232, v.35 etc) */ | |
202 | ||
203 | char device_name[25]; /* device instance name */ | |
204 | ||
205 | unsigned int io_base; /* base I/O address of adapter */ | |
206 | unsigned int irq_level; | |
d12341f9 | 207 | |
1da177e4 LT |
208 | MGSL_PARAMS params; /* communications parameters */ |
209 | ||
210 | unsigned char serial_signals; /* current serial signal states */ | |
211 | ||
0fab6de0 | 212 | bool irq_occurred; /* for diagnostics use */ |
1da177e4 LT |
213 | char testing_irq; |
214 | unsigned int init_error; /* startup error (DIAGS) */ | |
215 | ||
216 | char flag_buf[MAX_ASYNC_BUFFER_SIZE]; | |
0fab6de0 | 217 | bool drop_rts_on_tx_done; |
1da177e4 LT |
218 | |
219 | struct _input_signal_events input_signal_events; | |
220 | ||
221 | /* PCMCIA support */ | |
fd238232 | 222 | struct pcmcia_device *p_dev; |
1da177e4 LT |
223 | int stop; |
224 | ||
225 | /* SPPP/Cisco HDLC device parts */ | |
226 | int netcount; | |
1da177e4 LT |
227 | spinlock_t netlock; |
228 | ||
af69c7f9 | 229 | #if SYNCLINK_GENERIC_HDLC |
1da177e4 LT |
230 | struct net_device *netdev; |
231 | #endif | |
232 | ||
233 | } MGSLPC_INFO; | |
234 | ||
235 | #define MGSLPC_MAGIC 0x5402 | |
236 | ||
237 | /* | |
238 | * The size of the serial xmit buffer is 1 page, or 4096 bytes | |
239 | */ | |
240 | #define TXBUFSIZE 4096 | |
241 | ||
d12341f9 | 242 | |
1da177e4 LT |
243 | #define CHA 0x00 /* channel A offset */ |
244 | #define CHB 0x40 /* channel B offset */ | |
245 | ||
246 | /* | |
247 | * FIXME: PPC has PVR defined in asm/reg.h. For now we just undef it. | |
248 | */ | |
249 | #undef PVR | |
250 | ||
251 | #define RXFIFO 0 | |
252 | #define TXFIFO 0 | |
253 | #define STAR 0x20 | |
254 | #define CMDR 0x20 | |
255 | #define RSTA 0x21 | |
256 | #define PRE 0x21 | |
257 | #define MODE 0x22 | |
258 | #define TIMR 0x23 | |
259 | #define XAD1 0x24 | |
260 | #define XAD2 0x25 | |
261 | #define RAH1 0x26 | |
262 | #define RAH2 0x27 | |
263 | #define DAFO 0x27 | |
264 | #define RAL1 0x28 | |
265 | #define RFC 0x28 | |
266 | #define RHCR 0x29 | |
267 | #define RAL2 0x29 | |
268 | #define RBCL 0x2a | |
269 | #define XBCL 0x2a | |
270 | #define RBCH 0x2b | |
271 | #define XBCH 0x2b | |
272 | #define CCR0 0x2c | |
273 | #define CCR1 0x2d | |
274 | #define CCR2 0x2e | |
275 | #define CCR3 0x2f | |
276 | #define VSTR 0x34 | |
277 | #define BGR 0x34 | |
278 | #define RLCR 0x35 | |
279 | #define AML 0x36 | |
280 | #define AMH 0x37 | |
281 | #define GIS 0x38 | |
282 | #define IVA 0x38 | |
283 | #define IPC 0x39 | |
284 | #define ISR 0x3a | |
285 | #define IMR 0x3a | |
286 | #define PVR 0x3c | |
287 | #define PIS 0x3d | |
288 | #define PIM 0x3d | |
289 | #define PCR 0x3e | |
290 | #define CCR4 0x3f | |
d12341f9 | 291 | |
1da177e4 | 292 | // IMR/ISR |
d12341f9 | 293 | |
1da177e4 LT |
294 | #define IRQ_BREAK_ON BIT15 // rx break detected |
295 | #define IRQ_DATAOVERRUN BIT14 // receive data overflow | |
296 | #define IRQ_ALLSENT BIT13 // all sent | |
297 | #define IRQ_UNDERRUN BIT12 // transmit data underrun | |
298 | #define IRQ_TIMER BIT11 // timer interrupt | |
299 | #define IRQ_CTS BIT10 // CTS status change | |
300 | #define IRQ_TXREPEAT BIT9 // tx message repeat | |
301 | #define IRQ_TXFIFO BIT8 // transmit pool ready | |
302 | #define IRQ_RXEOM BIT7 // receive message end | |
303 | #define IRQ_EXITHUNT BIT6 // receive frame start | |
304 | #define IRQ_RXTIME BIT6 // rx char timeout | |
305 | #define IRQ_DCD BIT2 // carrier detect status change | |
306 | #define IRQ_OVERRUN BIT1 // receive frame overflow | |
307 | #define IRQ_RXFIFO BIT0 // receive pool full | |
d12341f9 | 308 | |
1da177e4 | 309 | // STAR |
d12341f9 | 310 | |
1da177e4 LT |
311 | #define XFW BIT6 // transmit FIFO write enable |
312 | #define CEC BIT2 // command executing | |
313 | #define CTS BIT1 // CTS state | |
d12341f9 | 314 | |
1da177e4 LT |
315 | #define PVR_DTR BIT0 |
316 | #define PVR_DSR BIT1 | |
317 | #define PVR_RI BIT2 | |
318 | #define PVR_AUTOCTS BIT3 | |
319 | #define PVR_RS232 0x20 /* 0010b */ | |
320 | #define PVR_V35 0xe0 /* 1110b */ | |
321 | #define PVR_RS422 0x40 /* 0100b */ | |
d12341f9 JG |
322 | |
323 | /* Register access functions */ | |
324 | ||
1da177e4 LT |
325 | #define write_reg(info, reg, val) outb((val),(info)->io_base + (reg)) |
326 | #define read_reg(info, reg) inb((info)->io_base + (reg)) | |
327 | ||
d12341f9 | 328 | #define read_reg16(info, reg) inw((info)->io_base + (reg)) |
1da177e4 | 329 | #define write_reg16(info, reg, val) outw((val), (info)->io_base + (reg)) |
d12341f9 | 330 | |
1da177e4 LT |
331 | #define set_reg_bits(info, reg, mask) \ |
332 | write_reg(info, (reg), \ | |
d12341f9 | 333 | (unsigned char) (read_reg(info, (reg)) | (mask))) |
1da177e4 LT |
334 | #define clear_reg_bits(info, reg, mask) \ |
335 | write_reg(info, (reg), \ | |
d12341f9 | 336 | (unsigned char) (read_reg(info, (reg)) & ~(mask))) |
1da177e4 LT |
337 | /* |
338 | * interrupt enable/disable routines | |
d12341f9 JG |
339 | */ |
340 | static void irq_disable(MGSLPC_INFO *info, unsigned char channel, unsigned short mask) | |
1da177e4 LT |
341 | { |
342 | if (channel == CHA) { | |
343 | info->imra_value |= mask; | |
344 | write_reg16(info, CHA + IMR, info->imra_value); | |
345 | } else { | |
346 | info->imrb_value |= mask; | |
347 | write_reg16(info, CHB + IMR, info->imrb_value); | |
348 | } | |
349 | } | |
d12341f9 | 350 | static void irq_enable(MGSLPC_INFO *info, unsigned char channel, unsigned short mask) |
1da177e4 LT |
351 | { |
352 | if (channel == CHA) { | |
353 | info->imra_value &= ~mask; | |
354 | write_reg16(info, CHA + IMR, info->imra_value); | |
355 | } else { | |
356 | info->imrb_value &= ~mask; | |
357 | write_reg16(info, CHB + IMR, info->imrb_value); | |
358 | } | |
359 | } | |
360 | ||
361 | #define port_irq_disable(info, mask) \ | |
362 | { info->pim_value |= (mask); write_reg(info, PIM, info->pim_value); } | |
363 | ||
364 | #define port_irq_enable(info, mask) \ | |
365 | { info->pim_value &= ~(mask); write_reg(info, PIM, info->pim_value); } | |
366 | ||
367 | static void rx_start(MGSLPC_INFO *info); | |
368 | static void rx_stop(MGSLPC_INFO *info); | |
369 | ||
eeb46134 | 370 | static void tx_start(MGSLPC_INFO *info, struct tty_struct *tty); |
1da177e4 LT |
371 | static void tx_stop(MGSLPC_INFO *info); |
372 | static void tx_set_idle(MGSLPC_INFO *info); | |
373 | ||
374 | static void get_signals(MGSLPC_INFO *info); | |
375 | static void set_signals(MGSLPC_INFO *info); | |
376 | ||
377 | static void reset_device(MGSLPC_INFO *info); | |
378 | ||
379 | static void hdlc_mode(MGSLPC_INFO *info); | |
380 | static void async_mode(MGSLPC_INFO *info); | |
381 | ||
382 | static void tx_timeout(unsigned long context); | |
383 | ||
eeb46134 | 384 | static int carrier_raised(struct tty_port *port); |
fcc8ac18 | 385 | static void dtr_rts(struct tty_port *port, int onoff); |
1da177e4 | 386 | |
af69c7f9 | 387 | #if SYNCLINK_GENERIC_HDLC |
1da177e4 LT |
388 | #define dev_to_port(D) (dev_to_hdlc(D)->priv) |
389 | static void hdlcdev_tx_done(MGSLPC_INFO *info); | |
390 | static void hdlcdev_rx(MGSLPC_INFO *info, char *buf, int size); | |
391 | static int hdlcdev_init(MGSLPC_INFO *info); | |
392 | static void hdlcdev_exit(MGSLPC_INFO *info); | |
393 | #endif | |
394 | ||
395 | static void trace_block(MGSLPC_INFO *info,const char* data, int count, int xmit); | |
396 | ||
0fab6de0 JP |
397 | static bool register_test(MGSLPC_INFO *info); |
398 | static bool irq_test(MGSLPC_INFO *info); | |
1da177e4 LT |
399 | static int adapter_test(MGSLPC_INFO *info); |
400 | ||
401 | static int claim_resources(MGSLPC_INFO *info); | |
402 | static void release_resources(MGSLPC_INFO *info); | |
403 | static void mgslpc_add_device(MGSLPC_INFO *info); | |
404 | static void mgslpc_remove_device(MGSLPC_INFO *info); | |
405 | ||
eeb46134 | 406 | static bool rx_get_frame(MGSLPC_INFO *info, struct tty_struct *tty); |
1da177e4 LT |
407 | static void rx_reset_buffers(MGSLPC_INFO *info); |
408 | static int rx_alloc_buffers(MGSLPC_INFO *info); | |
409 | static void rx_free_buffers(MGSLPC_INFO *info); | |
410 | ||
7d12e780 | 411 | static irqreturn_t mgslpc_isr(int irq, void *dev_id); |
1da177e4 LT |
412 | |
413 | /* | |
414 | * Bottom half interrupt handlers | |
415 | */ | |
c4028958 | 416 | static void bh_handler(struct work_struct *work); |
eeb46134 | 417 | static void bh_transmit(MGSLPC_INFO *info, struct tty_struct *tty); |
1da177e4 LT |
418 | static void bh_status(MGSLPC_INFO *info); |
419 | ||
420 | /* | |
421 | * ioctl handlers | |
422 | */ | |
423 | static int tiocmget(struct tty_struct *tty, struct file *file); | |
424 | static int tiocmset(struct tty_struct *tty, struct file *file, | |
425 | unsigned int set, unsigned int clear); | |
426 | static int get_stats(MGSLPC_INFO *info, struct mgsl_icount __user *user_icount); | |
427 | static int get_params(MGSLPC_INFO *info, MGSL_PARAMS __user *user_params); | |
eeb46134 | 428 | static int set_params(MGSLPC_INFO *info, MGSL_PARAMS __user *new_params, struct tty_struct *tty); |
1da177e4 LT |
429 | static int get_txidle(MGSLPC_INFO *info, int __user *idle_mode); |
430 | static int set_txidle(MGSLPC_INFO *info, int idle_mode); | |
eeb46134 | 431 | static int set_txenable(MGSLPC_INFO *info, int enable, struct tty_struct *tty); |
1da177e4 LT |
432 | static int tx_abort(MGSLPC_INFO *info); |
433 | static int set_rxenable(MGSLPC_INFO *info, int enable); | |
434 | static int wait_events(MGSLPC_INFO *info, int __user *mask); | |
435 | ||
436 | static MGSLPC_INFO *mgslpc_device_list = NULL; | |
437 | static int mgslpc_device_count = 0; | |
438 | ||
439 | /* | |
440 | * Set this param to non-zero to load eax with the | |
441 | * .text section address and breakpoint on module load. | |
442 | * This is useful for use with gdb and add-symbol-file command. | |
443 | */ | |
444 | static int break_on_load=0; | |
445 | ||
446 | /* | |
447 | * Driver major number, defaults to zero to get auto | |
448 | * assigned major number. May be forced as module parameter. | |
449 | */ | |
450 | static int ttymajor=0; | |
451 | ||
452 | static int debug_level = 0; | |
453 | static int maxframe[MAX_DEVICE_COUNT] = {0,}; | |
1da177e4 LT |
454 | |
455 | module_param(break_on_load, bool, 0); | |
456 | module_param(ttymajor, int, 0); | |
457 | module_param(debug_level, int, 0); | |
458 | module_param_array(maxframe, int, NULL, 0); | |
1da177e4 LT |
459 | |
460 | MODULE_LICENSE("GPL"); | |
461 | ||
462 | static char *driver_name = "SyncLink PC Card driver"; | |
a7482a2e | 463 | static char *driver_version = "$Revision: 4.34 $"; |
1da177e4 LT |
464 | |
465 | static struct tty_driver *serial_driver; | |
466 | ||
467 | /* number of characters left in xmit buffer before we ask for more */ | |
468 | #define WAKEUP_CHARS 256 | |
469 | ||
eeb46134 | 470 | static void mgslpc_change_params(MGSLPC_INFO *info, struct tty_struct *tty); |
1da177e4 LT |
471 | static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout); |
472 | ||
473 | /* PCMCIA prototypes */ | |
474 | ||
15b99ac1 | 475 | static int mgslpc_config(struct pcmcia_device *link); |
1da177e4 | 476 | static void mgslpc_release(u_long arg); |
cc3b4866 | 477 | static void mgslpc_detach(struct pcmcia_device *p_dev); |
1da177e4 | 478 | |
1da177e4 LT |
479 | /* |
480 | * 1st function defined in .text section. Calling this function in | |
481 | * init_module() followed by a breakpoint allows a remote debugger | |
482 | * (gdb) to get the .text address for the add-symbol-file command. | |
483 | * This allows remote debugging of dynamically loadable modules. | |
484 | */ | |
485 | static void* mgslpc_get_text_ptr(void) | |
486 | { | |
487 | return mgslpc_get_text_ptr; | |
488 | } | |
489 | ||
490 | /** | |
491 | * line discipline callback wrappers | |
492 | * | |
493 | * The wrappers maintain line discipline references | |
494 | * while calling into the line discipline. | |
495 | * | |
1da177e4 LT |
496 | * ldisc_receive_buf - pass receive data to line discipline |
497 | */ | |
498 | ||
1da177e4 LT |
499 | static void ldisc_receive_buf(struct tty_struct *tty, |
500 | const __u8 *data, char *flags, int count) | |
501 | { | |
502 | struct tty_ldisc *ld; | |
503 | if (!tty) | |
504 | return; | |
505 | ld = tty_ldisc_ref(tty); | |
506 | if (ld) { | |
a352def2 AC |
507 | if (ld->ops->receive_buf) |
508 | ld->ops->receive_buf(tty, data, flags, count); | |
1da177e4 LT |
509 | tty_ldisc_deref(ld); |
510 | } | |
511 | } | |
512 | ||
eeb46134 AC |
513 | static const struct tty_port_operations mgslpc_port_ops = { |
514 | .carrier_raised = carrier_raised, | |
fcc8ac18 | 515 | .dtr_rts = dtr_rts |
eeb46134 AC |
516 | }; |
517 | ||
15b99ac1 | 518 | static int mgslpc_probe(struct pcmcia_device *link) |
1da177e4 LT |
519 | { |
520 | MGSLPC_INFO *info; | |
15b99ac1 | 521 | int ret; |
fd238232 | 522 | |
1da177e4 LT |
523 | if (debug_level >= DEBUG_LEVEL_INFO) |
524 | printk("mgslpc_attach\n"); | |
fd238232 | 525 | |
dd00cc48 | 526 | info = kzalloc(sizeof(MGSLPC_INFO), GFP_KERNEL); |
1da177e4 LT |
527 | if (!info) { |
528 | printk("Error can't allocate device instance data\n"); | |
f8cfa618 | 529 | return -ENOMEM; |
1da177e4 LT |
530 | } |
531 | ||
1da177e4 | 532 | info->magic = MGSLPC_MAGIC; |
eeb46134 AC |
533 | tty_port_init(&info->port); |
534 | info->port.ops = &mgslpc_port_ops; | |
c4028958 | 535 | INIT_WORK(&info->task, bh_handler); |
1da177e4 | 536 | info->max_frame_size = 4096; |
eeb46134 AC |
537 | info->port.close_delay = 5*HZ/10; |
538 | info->port.closing_wait = 30*HZ; | |
1da177e4 LT |
539 | init_waitqueue_head(&info->status_event_wait_q); |
540 | init_waitqueue_head(&info->event_wait_q); | |
541 | spin_lock_init(&info->lock); | |
542 | spin_lock_init(&info->netlock); | |
543 | memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS)); | |
d12341f9 | 544 | info->idle_mode = HDLC_TXIDLE_FLAGS; |
1da177e4 LT |
545 | info->imra_value = 0xffff; |
546 | info->imrb_value = 0xffff; | |
547 | info->pim_value = 0xff; | |
548 | ||
fba395ee | 549 | info->p_dev = link; |
1da177e4 | 550 | link->priv = info; |
fd238232 | 551 | |
fba395ee | 552 | /* Initialize the struct pcmcia_device structure */ |
1da177e4 | 553 | |
1da177e4 | 554 | link->conf.Attributes = 0; |
1da177e4 LT |
555 | link->conf.IntType = INT_MEMORY_AND_IO; |
556 | ||
15b99ac1 DB |
557 | ret = mgslpc_config(link); |
558 | if (ret) | |
559 | return ret; | |
1da177e4 LT |
560 | |
561 | mgslpc_add_device(info); | |
562 | ||
f8cfa618 | 563 | return 0; |
1da177e4 LT |
564 | } |
565 | ||
566 | /* Card has been inserted. | |
567 | */ | |
568 | ||
aaa8cfda DB |
569 | static int mgslpc_ioprobe(struct pcmcia_device *p_dev, |
570 | cistpl_cftable_entry_t *cfg, | |
571 | cistpl_cftable_entry_t *dflt, | |
572 | unsigned int vcc, | |
573 | void *priv_data) | |
574 | { | |
575 | if (cfg->io.nwin > 0) { | |
576 | p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO; | |
577 | if (!(cfg->io.flags & CISTPL_IO_8BIT)) | |
578 | p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_16; | |
579 | if (!(cfg->io.flags & CISTPL_IO_16BIT)) | |
580 | p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8; | |
581 | p_dev->io.IOAddrLines = cfg->io.flags & CISTPL_IO_LINES_MASK; | |
582 | p_dev->io.BasePort1 = cfg->io.win[0].base; | |
583 | p_dev->io.NumPorts1 = cfg->io.win[0].len; | |
584 | return pcmcia_request_io(p_dev, &p_dev->io); | |
585 | } | |
586 | return -ENODEV; | |
587 | } | |
588 | ||
15b99ac1 | 589 | static int mgslpc_config(struct pcmcia_device *link) |
1da177e4 | 590 | { |
1da177e4 | 591 | MGSLPC_INFO *info = link->priv; |
cbf624f0 | 592 | int ret; |
d12341f9 | 593 | |
1da177e4 LT |
594 | if (debug_level >= DEBUG_LEVEL_INFO) |
595 | printk("mgslpc_config(0x%p)\n", link); | |
596 | ||
cbf624f0 DB |
597 | ret = pcmcia_loop_config(link, mgslpc_ioprobe, NULL); |
598 | if (ret != 0) | |
599 | goto failed; | |
1da177e4 | 600 | |
1da177e4 | 601 | link->conf.Attributes = CONF_ENABLE_IRQ; |
1da177e4 LT |
602 | link->conf.IntType = INT_MEMORY_AND_IO; |
603 | link->conf.ConfigIndex = 8; | |
604 | link->conf.Present = PRESENT_OPTION; | |
d12341f9 | 605 | |
eb14120f | 606 | ret = pcmcia_request_irq(link, mgslpc_isr); |
cbf624f0 DB |
607 | if (ret) |
608 | goto failed; | |
609 | ret = pcmcia_request_configuration(link, &link->conf); | |
610 | if (ret) | |
611 | goto failed; | |
1da177e4 LT |
612 | |
613 | info->io_base = link->io.BasePort1; | |
eb14120f | 614 | info->irq_level = link->irq; |
1da177e4 | 615 | |
ded6a1a3 DB |
616 | dev_info(&link->dev, "index 0x%02x:", |
617 | link->conf.ConfigIndex); | |
1da177e4 | 618 | if (link->conf.Attributes & CONF_ENABLE_IRQ) |
eb14120f | 619 | printk(", irq %d", link->irq); |
1da177e4 LT |
620 | if (link->io.NumPorts1) |
621 | printk(", io 0x%04x-0x%04x", link->io.BasePort1, | |
622 | link->io.BasePort1+link->io.NumPorts1-1); | |
623 | printk("\n"); | |
15b99ac1 | 624 | return 0; |
1da177e4 | 625 | |
cbf624f0 | 626 | failed: |
1da177e4 | 627 | mgslpc_release((u_long)link); |
15b99ac1 | 628 | return -ENODEV; |
1da177e4 LT |
629 | } |
630 | ||
631 | /* Card has been removed. | |
632 | * Unregister device and release PCMCIA configuration. | |
633 | * If device is open, postpone until it is closed. | |
634 | */ | |
635 | static void mgslpc_release(u_long arg) | |
636 | { | |
e2d40963 | 637 | struct pcmcia_device *link = (struct pcmcia_device *)arg; |
1da177e4 | 638 | |
e2d40963 DB |
639 | if (debug_level >= DEBUG_LEVEL_INFO) |
640 | printk("mgslpc_release(0x%p)\n", link); | |
1da177e4 | 641 | |
e2d40963 | 642 | pcmcia_disable_device(link); |
1da177e4 LT |
643 | } |
644 | ||
fba395ee | 645 | static void mgslpc_detach(struct pcmcia_device *link) |
1da177e4 | 646 | { |
e2d40963 DB |
647 | if (debug_level >= DEBUG_LEVEL_INFO) |
648 | printk("mgslpc_detach(0x%p)\n", link); | |
cc3b4866 | 649 | |
e2d40963 DB |
650 | ((MGSLPC_INFO *)link->priv)->stop = 1; |
651 | mgslpc_release((u_long)link); | |
1da177e4 | 652 | |
e2d40963 | 653 | mgslpc_remove_device((MGSLPC_INFO *)link->priv); |
1da177e4 LT |
654 | } |
655 | ||
fba395ee | 656 | static int mgslpc_suspend(struct pcmcia_device *link) |
98e4c28b | 657 | { |
98e4c28b DB |
658 | MGSLPC_INFO *info = link->priv; |
659 | ||
98e4c28b | 660 | info->stop = 1; |
98e4c28b DB |
661 | |
662 | return 0; | |
663 | } | |
664 | ||
fba395ee | 665 | static int mgslpc_resume(struct pcmcia_device *link) |
98e4c28b | 666 | { |
98e4c28b DB |
667 | MGSLPC_INFO *info = link->priv; |
668 | ||
98e4c28b DB |
669 | info->stop = 0; |
670 | ||
671 | return 0; | |
672 | } | |
673 | ||
674 | ||
0fab6de0 | 675 | static inline bool mgslpc_paranoia_check(MGSLPC_INFO *info, |
1da177e4 LT |
676 | char *name, const char *routine) |
677 | { | |
678 | #ifdef MGSLPC_PARANOIA_CHECK | |
679 | static const char *badmagic = | |
680 | "Warning: bad magic number for mgsl struct (%s) in %s\n"; | |
681 | static const char *badinfo = | |
682 | "Warning: null mgslpc_info for (%s) in %s\n"; | |
683 | ||
684 | if (!info) { | |
685 | printk(badinfo, name, routine); | |
0fab6de0 | 686 | return true; |
1da177e4 LT |
687 | } |
688 | if (info->magic != MGSLPC_MAGIC) { | |
689 | printk(badmagic, name, routine); | |
0fab6de0 | 690 | return true; |
1da177e4 LT |
691 | } |
692 | #else | |
693 | if (!info) | |
0fab6de0 | 694 | return true; |
1da177e4 | 695 | #endif |
0fab6de0 | 696 | return false; |
1da177e4 LT |
697 | } |
698 | ||
699 | ||
700 | #define CMD_RXFIFO BIT7 // release current rx FIFO | |
701 | #define CMD_RXRESET BIT6 // receiver reset | |
702 | #define CMD_RXFIFO_READ BIT5 | |
703 | #define CMD_START_TIMER BIT4 | |
704 | #define CMD_TXFIFO BIT3 // release current tx FIFO | |
705 | #define CMD_TXEOM BIT1 // transmit end message | |
706 | #define CMD_TXRESET BIT0 // transmit reset | |
707 | ||
0fab6de0 | 708 | static bool wait_command_complete(MGSLPC_INFO *info, unsigned char channel) |
1da177e4 LT |
709 | { |
710 | int i = 0; | |
d12341f9 | 711 | /* wait for command completion */ |
1da177e4 LT |
712 | while (read_reg(info, (unsigned char)(channel+STAR)) & BIT2) { |
713 | udelay(1); | |
714 | if (i++ == 1000) | |
0fab6de0 | 715 | return false; |
1da177e4 | 716 | } |
0fab6de0 | 717 | return true; |
1da177e4 LT |
718 | } |
719 | ||
d12341f9 | 720 | static void issue_command(MGSLPC_INFO *info, unsigned char channel, unsigned char cmd) |
1da177e4 LT |
721 | { |
722 | wait_command_complete(info, channel); | |
723 | write_reg(info, (unsigned char) (channel + CMDR), cmd); | |
724 | } | |
725 | ||
726 | static void tx_pause(struct tty_struct *tty) | |
727 | { | |
728 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
729 | unsigned long flags; | |
d12341f9 | 730 | |
1da177e4 LT |
731 | if (mgslpc_paranoia_check(info, tty->name, "tx_pause")) |
732 | return; | |
733 | if (debug_level >= DEBUG_LEVEL_INFO) | |
d12341f9 JG |
734 | printk("tx_pause(%s)\n",info->device_name); |
735 | ||
1da177e4 LT |
736 | spin_lock_irqsave(&info->lock,flags); |
737 | if (info->tx_enabled) | |
738 | tx_stop(info); | |
739 | spin_unlock_irqrestore(&info->lock,flags); | |
740 | } | |
741 | ||
742 | static void tx_release(struct tty_struct *tty) | |
743 | { | |
744 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
745 | unsigned long flags; | |
d12341f9 | 746 | |
1da177e4 LT |
747 | if (mgslpc_paranoia_check(info, tty->name, "tx_release")) |
748 | return; | |
749 | if (debug_level >= DEBUG_LEVEL_INFO) | |
d12341f9 JG |
750 | printk("tx_release(%s)\n",info->device_name); |
751 | ||
1da177e4 LT |
752 | spin_lock_irqsave(&info->lock,flags); |
753 | if (!info->tx_enabled) | |
eeb46134 | 754 | tx_start(info, tty); |
1da177e4 LT |
755 | spin_unlock_irqrestore(&info->lock,flags); |
756 | } | |
757 | ||
758 | /* Return next bottom half action to perform. | |
759 | * or 0 if nothing to do. | |
760 | */ | |
761 | static int bh_action(MGSLPC_INFO *info) | |
762 | { | |
763 | unsigned long flags; | |
764 | int rc = 0; | |
d12341f9 | 765 | |
1da177e4 LT |
766 | spin_lock_irqsave(&info->lock,flags); |
767 | ||
768 | if (info->pending_bh & BH_RECEIVE) { | |
769 | info->pending_bh &= ~BH_RECEIVE; | |
770 | rc = BH_RECEIVE; | |
771 | } else if (info->pending_bh & BH_TRANSMIT) { | |
772 | info->pending_bh &= ~BH_TRANSMIT; | |
773 | rc = BH_TRANSMIT; | |
774 | } else if (info->pending_bh & BH_STATUS) { | |
775 | info->pending_bh &= ~BH_STATUS; | |
776 | rc = BH_STATUS; | |
777 | } | |
778 | ||
779 | if (!rc) { | |
780 | /* Mark BH routine as complete */ | |
0fab6de0 JP |
781 | info->bh_running = false; |
782 | info->bh_requested = false; | |
1da177e4 | 783 | } |
d12341f9 | 784 | |
1da177e4 | 785 | spin_unlock_irqrestore(&info->lock,flags); |
d12341f9 | 786 | |
1da177e4 LT |
787 | return rc; |
788 | } | |
789 | ||
c4028958 | 790 | static void bh_handler(struct work_struct *work) |
1da177e4 | 791 | { |
c4028958 | 792 | MGSLPC_INFO *info = container_of(work, MGSLPC_INFO, task); |
eeb46134 | 793 | struct tty_struct *tty; |
1da177e4 LT |
794 | int action; |
795 | ||
796 | if (!info) | |
797 | return; | |
d12341f9 | 798 | |
1da177e4 LT |
799 | if (debug_level >= DEBUG_LEVEL_BH) |
800 | printk( "%s(%d):bh_handler(%s) entry\n", | |
801 | __FILE__,__LINE__,info->device_name); | |
d12341f9 | 802 | |
0fab6de0 | 803 | info->bh_running = true; |
eeb46134 | 804 | tty = tty_port_tty_get(&info->port); |
1da177e4 LT |
805 | |
806 | while((action = bh_action(info)) != 0) { | |
d12341f9 | 807 | |
1da177e4 LT |
808 | /* Process work item */ |
809 | if ( debug_level >= DEBUG_LEVEL_BH ) | |
810 | printk( "%s(%d):bh_handler() work item action=%d\n", | |
811 | __FILE__,__LINE__,action); | |
812 | ||
813 | switch (action) { | |
d12341f9 | 814 | |
1da177e4 | 815 | case BH_RECEIVE: |
eeb46134 | 816 | while(rx_get_frame(info, tty)); |
1da177e4 LT |
817 | break; |
818 | case BH_TRANSMIT: | |
eeb46134 | 819 | bh_transmit(info, tty); |
1da177e4 LT |
820 | break; |
821 | case BH_STATUS: | |
822 | bh_status(info); | |
823 | break; | |
824 | default: | |
825 | /* unknown work item ID */ | |
826 | printk("Unknown work item ID=%08X!\n", action); | |
827 | break; | |
828 | } | |
829 | } | |
830 | ||
eeb46134 | 831 | tty_kref_put(tty); |
1da177e4 LT |
832 | if (debug_level >= DEBUG_LEVEL_BH) |
833 | printk( "%s(%d):bh_handler(%s) exit\n", | |
834 | __FILE__,__LINE__,info->device_name); | |
835 | } | |
836 | ||
eeb46134 | 837 | static void bh_transmit(MGSLPC_INFO *info, struct tty_struct *tty) |
1da177e4 | 838 | { |
1da177e4 LT |
839 | if (debug_level >= DEBUG_LEVEL_BH) |
840 | printk("bh_transmit() entry on %s\n", info->device_name); | |
841 | ||
b963a844 | 842 | if (tty) |
1da177e4 | 843 | tty_wakeup(tty); |
1da177e4 LT |
844 | } |
845 | ||
cdaad343 | 846 | static void bh_status(MGSLPC_INFO *info) |
1da177e4 LT |
847 | { |
848 | info->ri_chkcount = 0; | |
849 | info->dsr_chkcount = 0; | |
850 | info->dcd_chkcount = 0; | |
851 | info->cts_chkcount = 0; | |
852 | } | |
853 | ||
d12341f9 | 854 | /* eom: non-zero = end of frame */ |
1da177e4 LT |
855 | static void rx_ready_hdlc(MGSLPC_INFO *info, int eom) |
856 | { | |
857 | unsigned char data[2]; | |
858 | unsigned char fifo_count, read_count, i; | |
859 | RXBUF *buf = (RXBUF*)(info->rx_buf + (info->rx_put * info->rx_buf_size)); | |
860 | ||
861 | if (debug_level >= DEBUG_LEVEL_ISR) | |
862 | printk("%s(%d):rx_ready_hdlc(eom=%d)\n",__FILE__,__LINE__,eom); | |
d12341f9 | 863 | |
1da177e4 LT |
864 | if (!info->rx_enabled) |
865 | return; | |
866 | ||
867 | if (info->rx_frame_count >= info->rx_buf_count) { | |
868 | /* no more free buffers */ | |
869 | issue_command(info, CHA, CMD_RXRESET); | |
870 | info->pending_bh |= BH_RECEIVE; | |
0fab6de0 | 871 | info->rx_overflow = true; |
1da177e4 LT |
872 | info->icount.buf_overrun++; |
873 | return; | |
874 | } | |
875 | ||
876 | if (eom) { | |
d12341f9 | 877 | /* end of frame, get FIFO count from RBCL register */ |
1da177e4 LT |
878 | if (!(fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f))) |
879 | fifo_count = 32; | |
880 | } else | |
881 | fifo_count = 32; | |
d12341f9 | 882 | |
1da177e4 LT |
883 | do { |
884 | if (fifo_count == 1) { | |
885 | read_count = 1; | |
886 | data[0] = read_reg(info, CHA + RXFIFO); | |
887 | } else { | |
888 | read_count = 2; | |
889 | *((unsigned short *) data) = read_reg16(info, CHA + RXFIFO); | |
890 | } | |
891 | fifo_count -= read_count; | |
892 | if (!fifo_count && eom) | |
893 | buf->status = data[--read_count]; | |
894 | ||
895 | for (i = 0; i < read_count; i++) { | |
896 | if (buf->count >= info->max_frame_size) { | |
897 | /* frame too large, reset receiver and reset current buffer */ | |
898 | issue_command(info, CHA, CMD_RXRESET); | |
899 | buf->count = 0; | |
900 | return; | |
901 | } | |
902 | *(buf->data + buf->count) = data[i]; | |
903 | buf->count++; | |
904 | } | |
905 | } while (fifo_count); | |
906 | ||
907 | if (eom) { | |
908 | info->pending_bh |= BH_RECEIVE; | |
909 | info->rx_frame_count++; | |
910 | info->rx_put++; | |
911 | if (info->rx_put >= info->rx_buf_count) | |
912 | info->rx_put = 0; | |
913 | } | |
914 | issue_command(info, CHA, CMD_RXFIFO); | |
915 | } | |
916 | ||
eeb46134 | 917 | static void rx_ready_async(MGSLPC_INFO *info, int tcd, struct tty_struct *tty) |
1da177e4 | 918 | { |
33f0f88f | 919 | unsigned char data, status, flag; |
1da177e4 | 920 | int fifo_count; |
33f0f88f | 921 | int work = 0; |
1da177e4 LT |
922 | struct mgsl_icount *icount = &info->icount; |
923 | ||
924 | if (tcd) { | |
d12341f9 | 925 | /* early termination, get FIFO count from RBCL register */ |
1da177e4 LT |
926 | fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f); |
927 | ||
928 | /* Zero fifo count could mean 0 or 32 bytes available. | |
929 | * If BIT5 of STAR is set then at least 1 byte is available. | |
930 | */ | |
931 | if (!fifo_count && (read_reg(info,CHA+STAR) & BIT5)) | |
932 | fifo_count = 32; | |
933 | } else | |
934 | fifo_count = 32; | |
33f0f88f AC |
935 | |
936 | tty_buffer_request_room(tty, fifo_count); | |
d12341f9 | 937 | /* Flush received async data to receive data buffer. */ |
1da177e4 LT |
938 | while (fifo_count) { |
939 | data = read_reg(info, CHA + RXFIFO); | |
940 | status = read_reg(info, CHA + RXFIFO); | |
941 | fifo_count -= 2; | |
942 | ||
1da177e4 | 943 | icount->rx++; |
33f0f88f | 944 | flag = TTY_NORMAL; |
1da177e4 LT |
945 | |
946 | // if no frameing/crc error then save data | |
947 | // BIT7:parity error | |
948 | // BIT6:framing error | |
949 | ||
950 | if (status & (BIT7 + BIT6)) { | |
d12341f9 | 951 | if (status & BIT7) |
1da177e4 LT |
952 | icount->parity++; |
953 | else | |
954 | icount->frame++; | |
955 | ||
956 | /* discard char if tty control flags say so */ | |
957 | if (status & info->ignore_status_mask) | |
958 | continue; | |
d12341f9 | 959 | |
1da177e4 LT |
960 | status &= info->read_status_mask; |
961 | ||
962 | if (status & BIT7) | |
33f0f88f | 963 | flag = TTY_PARITY; |
1da177e4 | 964 | else if (status & BIT6) |
33f0f88f | 965 | flag = TTY_FRAME; |
1da177e4 | 966 | } |
33f0f88f | 967 | work += tty_insert_flip_char(tty, data, flag); |
1da177e4 LT |
968 | } |
969 | issue_command(info, CHA, CMD_RXFIFO); | |
970 | ||
971 | if (debug_level >= DEBUG_LEVEL_ISR) { | |
33f0f88f AC |
972 | printk("%s(%d):rx_ready_async", |
973 | __FILE__,__LINE__); | |
1da177e4 LT |
974 | printk("%s(%d):rx=%d brk=%d parity=%d frame=%d overrun=%d\n", |
975 | __FILE__,__LINE__,icount->rx,icount->brk, | |
976 | icount->parity,icount->frame,icount->overrun); | |
977 | } | |
d12341f9 | 978 | |
33f0f88f | 979 | if (work) |
1da177e4 LT |
980 | tty_flip_buffer_push(tty); |
981 | } | |
982 | ||
983 | ||
eeb46134 | 984 | static void tx_done(MGSLPC_INFO *info, struct tty_struct *tty) |
1da177e4 LT |
985 | { |
986 | if (!info->tx_active) | |
987 | return; | |
d12341f9 | 988 | |
0fab6de0 JP |
989 | info->tx_active = false; |
990 | info->tx_aborting = false; | |
1da177e4 LT |
991 | |
992 | if (info->params.mode == MGSL_MODE_ASYNC) | |
993 | return; | |
994 | ||
995 | info->tx_count = info->tx_put = info->tx_get = 0; | |
d12341f9 JG |
996 | del_timer(&info->tx_timer); |
997 | ||
1da177e4 LT |
998 | if (info->drop_rts_on_tx_done) { |
999 | get_signals(info); | |
1000 | if (info->serial_signals & SerialSignal_RTS) { | |
1001 | info->serial_signals &= ~SerialSignal_RTS; | |
1002 | set_signals(info); | |
1003 | } | |
0fab6de0 | 1004 | info->drop_rts_on_tx_done = false; |
1da177e4 LT |
1005 | } |
1006 | ||
af69c7f9 | 1007 | #if SYNCLINK_GENERIC_HDLC |
1da177e4 LT |
1008 | if (info->netcount) |
1009 | hdlcdev_tx_done(info); | |
d12341f9 | 1010 | else |
1da177e4 LT |
1011 | #endif |
1012 | { | |
eeb46134 | 1013 | if (tty->stopped || tty->hw_stopped) { |
1da177e4 LT |
1014 | tx_stop(info); |
1015 | return; | |
1016 | } | |
1017 | info->pending_bh |= BH_TRANSMIT; | |
1018 | } | |
1019 | } | |
1020 | ||
eeb46134 | 1021 | static void tx_ready(MGSLPC_INFO *info, struct tty_struct *tty) |
1da177e4 LT |
1022 | { |
1023 | unsigned char fifo_count = 32; | |
1024 | int c; | |
1025 | ||
1026 | if (debug_level >= DEBUG_LEVEL_ISR) | |
1027 | printk("%s(%d):tx_ready(%s)\n", __FILE__,__LINE__,info->device_name); | |
1028 | ||
1029 | if (info->params.mode == MGSL_MODE_HDLC) { | |
1030 | if (!info->tx_active) | |
1031 | return; | |
1032 | } else { | |
eeb46134 | 1033 | if (tty->stopped || tty->hw_stopped) { |
1da177e4 LT |
1034 | tx_stop(info); |
1035 | return; | |
1036 | } | |
1037 | if (!info->tx_count) | |
0fab6de0 | 1038 | info->tx_active = false; |
1da177e4 LT |
1039 | } |
1040 | ||
1041 | if (!info->tx_count) | |
1042 | return; | |
1043 | ||
1044 | while (info->tx_count && fifo_count) { | |
1045 | c = min(2, min_t(int, fifo_count, min(info->tx_count, TXBUFSIZE - info->tx_get))); | |
d12341f9 | 1046 | |
1da177e4 LT |
1047 | if (c == 1) { |
1048 | write_reg(info, CHA + TXFIFO, *(info->tx_buf + info->tx_get)); | |
1049 | } else { | |
1050 | write_reg16(info, CHA + TXFIFO, | |
1051 | *((unsigned short*)(info->tx_buf + info->tx_get))); | |
1052 | } | |
1053 | info->tx_count -= c; | |
1054 | info->tx_get = (info->tx_get + c) & (TXBUFSIZE - 1); | |
1055 | fifo_count -= c; | |
1056 | } | |
1057 | ||
1058 | if (info->params.mode == MGSL_MODE_ASYNC) { | |
1059 | if (info->tx_count < WAKEUP_CHARS) | |
1060 | info->pending_bh |= BH_TRANSMIT; | |
1061 | issue_command(info, CHA, CMD_TXFIFO); | |
1062 | } else { | |
1063 | if (info->tx_count) | |
1064 | issue_command(info, CHA, CMD_TXFIFO); | |
1065 | else | |
1066 | issue_command(info, CHA, CMD_TXFIFO + CMD_TXEOM); | |
1067 | } | |
1068 | } | |
1069 | ||
eeb46134 | 1070 | static void cts_change(MGSLPC_INFO *info, struct tty_struct *tty) |
1da177e4 LT |
1071 | { |
1072 | get_signals(info); | |
1073 | if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) | |
1074 | irq_disable(info, CHB, IRQ_CTS); | |
1075 | info->icount.cts++; | |
1076 | if (info->serial_signals & SerialSignal_CTS) | |
1077 | info->input_signal_events.cts_up++; | |
1078 | else | |
1079 | info->input_signal_events.cts_down++; | |
1080 | wake_up_interruptible(&info->status_event_wait_q); | |
1081 | wake_up_interruptible(&info->event_wait_q); | |
1082 | ||
eeb46134 AC |
1083 | if (info->port.flags & ASYNC_CTS_FLOW) { |
1084 | if (tty->hw_stopped) { | |
1da177e4 LT |
1085 | if (info->serial_signals & SerialSignal_CTS) { |
1086 | if (debug_level >= DEBUG_LEVEL_ISR) | |
1087 | printk("CTS tx start..."); | |
eeb46134 AC |
1088 | if (tty) |
1089 | tty->hw_stopped = 0; | |
1090 | tx_start(info, tty); | |
1da177e4 LT |
1091 | info->pending_bh |= BH_TRANSMIT; |
1092 | return; | |
1093 | } | |
1094 | } else { | |
1095 | if (!(info->serial_signals & SerialSignal_CTS)) { | |
1096 | if (debug_level >= DEBUG_LEVEL_ISR) | |
1097 | printk("CTS tx stop..."); | |
eeb46134 AC |
1098 | if (tty) |
1099 | tty->hw_stopped = 1; | |
1da177e4 LT |
1100 | tx_stop(info); |
1101 | } | |
1102 | } | |
1103 | } | |
1104 | info->pending_bh |= BH_STATUS; | |
1105 | } | |
1106 | ||
eeb46134 | 1107 | static void dcd_change(MGSLPC_INFO *info, struct tty_struct *tty) |
1da177e4 LT |
1108 | { |
1109 | get_signals(info); | |
1110 | if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) | |
1111 | irq_disable(info, CHB, IRQ_DCD); | |
1112 | info->icount.dcd++; | |
1113 | if (info->serial_signals & SerialSignal_DCD) { | |
1114 | info->input_signal_events.dcd_up++; | |
1115 | } | |
1116 | else | |
1117 | info->input_signal_events.dcd_down++; | |
af69c7f9 | 1118 | #if SYNCLINK_GENERIC_HDLC |
fbeff3c1 KH |
1119 | if (info->netcount) { |
1120 | if (info->serial_signals & SerialSignal_DCD) | |
1121 | netif_carrier_on(info->netdev); | |
1122 | else | |
1123 | netif_carrier_off(info->netdev); | |
1124 | } | |
1da177e4 LT |
1125 | #endif |
1126 | wake_up_interruptible(&info->status_event_wait_q); | |
1127 | wake_up_interruptible(&info->event_wait_q); | |
1128 | ||
eeb46134 | 1129 | if (info->port.flags & ASYNC_CHECK_CD) { |
1da177e4 LT |
1130 | if (debug_level >= DEBUG_LEVEL_ISR) |
1131 | printk("%s CD now %s...", info->device_name, | |
1132 | (info->serial_signals & SerialSignal_DCD) ? "on" : "off"); | |
1133 | if (info->serial_signals & SerialSignal_DCD) | |
eeb46134 | 1134 | wake_up_interruptible(&info->port.open_wait); |
1da177e4 LT |
1135 | else { |
1136 | if (debug_level >= DEBUG_LEVEL_ISR) | |
1137 | printk("doing serial hangup..."); | |
eeb46134 AC |
1138 | if (tty) |
1139 | tty_hangup(tty); | |
1da177e4 LT |
1140 | } |
1141 | } | |
1142 | info->pending_bh |= BH_STATUS; | |
1143 | } | |
1144 | ||
1145 | static void dsr_change(MGSLPC_INFO *info) | |
1146 | { | |
1147 | get_signals(info); | |
1148 | if ((info->dsr_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) | |
1149 | port_irq_disable(info, PVR_DSR); | |
1150 | info->icount.dsr++; | |
1151 | if (info->serial_signals & SerialSignal_DSR) | |
1152 | info->input_signal_events.dsr_up++; | |
1153 | else | |
1154 | info->input_signal_events.dsr_down++; | |
1155 | wake_up_interruptible(&info->status_event_wait_q); | |
1156 | wake_up_interruptible(&info->event_wait_q); | |
1157 | info->pending_bh |= BH_STATUS; | |
1158 | } | |
1159 | ||
1160 | static void ri_change(MGSLPC_INFO *info) | |
1161 | { | |
1162 | get_signals(info); | |
1163 | if ((info->ri_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) | |
1164 | port_irq_disable(info, PVR_RI); | |
1165 | info->icount.rng++; | |
1166 | if (info->serial_signals & SerialSignal_RI) | |
1167 | info->input_signal_events.ri_up++; | |
1168 | else | |
1169 | info->input_signal_events.ri_down++; | |
1170 | wake_up_interruptible(&info->status_event_wait_q); | |
1171 | wake_up_interruptible(&info->event_wait_q); | |
1172 | info->pending_bh |= BH_STATUS; | |
1173 | } | |
1174 | ||
1175 | /* Interrupt service routine entry point. | |
d12341f9 | 1176 | * |
1da177e4 | 1177 | * Arguments: |
d12341f9 | 1178 | * |
1da177e4 LT |
1179 | * irq interrupt number that caused interrupt |
1180 | * dev_id device ID supplied during interrupt registration | |
1da177e4 | 1181 | */ |
a6f97b29 | 1182 | static irqreturn_t mgslpc_isr(int dummy, void *dev_id) |
1da177e4 | 1183 | { |
a6f97b29 | 1184 | MGSLPC_INFO *info = dev_id; |
eeb46134 | 1185 | struct tty_struct *tty; |
1da177e4 LT |
1186 | unsigned short isr; |
1187 | unsigned char gis, pis; | |
1188 | int count=0; | |
1189 | ||
d12341f9 | 1190 | if (debug_level >= DEBUG_LEVEL_ISR) |
a6f97b29 | 1191 | printk("mgslpc_isr(%d) entry.\n", info->irq_level); |
d12341f9 | 1192 | |
e2d40963 | 1193 | if (!(info->p_dev->_locked)) |
1da177e4 LT |
1194 | return IRQ_HANDLED; |
1195 | ||
eeb46134 AC |
1196 | tty = tty_port_tty_get(&info->port); |
1197 | ||
1da177e4 LT |
1198 | spin_lock(&info->lock); |
1199 | ||
1200 | while ((gis = read_reg(info, CHA + GIS))) { | |
d12341f9 | 1201 | if (debug_level >= DEBUG_LEVEL_ISR) |
1da177e4 LT |
1202 | printk("mgslpc_isr %s gis=%04X\n", info->device_name,gis); |
1203 | ||
1204 | if ((gis & 0x70) || count > 1000) { | |
1205 | printk("synclink_cs:hardware failed or ejected\n"); | |
1206 | break; | |
1207 | } | |
1208 | count++; | |
1209 | ||
1210 | if (gis & (BIT1 + BIT0)) { | |
1211 | isr = read_reg16(info, CHB + ISR); | |
1212 | if (isr & IRQ_DCD) | |
eeb46134 | 1213 | dcd_change(info, tty); |
1da177e4 | 1214 | if (isr & IRQ_CTS) |
eeb46134 | 1215 | cts_change(info, tty); |
1da177e4 LT |
1216 | } |
1217 | if (gis & (BIT3 + BIT2)) | |
1218 | { | |
1219 | isr = read_reg16(info, CHA + ISR); | |
1220 | if (isr & IRQ_TIMER) { | |
0fab6de0 | 1221 | info->irq_occurred = true; |
1da177e4 LT |
1222 | irq_disable(info, CHA, IRQ_TIMER); |
1223 | } | |
1224 | ||
d12341f9 | 1225 | /* receive IRQs */ |
1da177e4 LT |
1226 | if (isr & IRQ_EXITHUNT) { |
1227 | info->icount.exithunt++; | |
1228 | wake_up_interruptible(&info->event_wait_q); | |
1229 | } | |
1230 | if (isr & IRQ_BREAK_ON) { | |
1231 | info->icount.brk++; | |
eeb46134 AC |
1232 | if (info->port.flags & ASYNC_SAK) |
1233 | do_SAK(tty); | |
1da177e4 LT |
1234 | } |
1235 | if (isr & IRQ_RXTIME) { | |
1236 | issue_command(info, CHA, CMD_RXFIFO_READ); | |
1237 | } | |
1238 | if (isr & (IRQ_RXEOM + IRQ_RXFIFO)) { | |
1239 | if (info->params.mode == MGSL_MODE_HDLC) | |
d12341f9 | 1240 | rx_ready_hdlc(info, isr & IRQ_RXEOM); |
1da177e4 | 1241 | else |
eeb46134 | 1242 | rx_ready_async(info, isr & IRQ_RXEOM, tty); |
1da177e4 LT |
1243 | } |
1244 | ||
d12341f9 | 1245 | /* transmit IRQs */ |
1da177e4 LT |
1246 | if (isr & IRQ_UNDERRUN) { |
1247 | if (info->tx_aborting) | |
1248 | info->icount.txabort++; | |
1249 | else | |
1250 | info->icount.txunder++; | |
eeb46134 | 1251 | tx_done(info, tty); |
1da177e4 LT |
1252 | } |
1253 | else if (isr & IRQ_ALLSENT) { | |
1254 | info->icount.txok++; | |
eeb46134 | 1255 | tx_done(info, tty); |
1da177e4 LT |
1256 | } |
1257 | else if (isr & IRQ_TXFIFO) | |
eeb46134 | 1258 | tx_ready(info, tty); |
1da177e4 LT |
1259 | } |
1260 | if (gis & BIT7) { | |
1261 | pis = read_reg(info, CHA + PIS); | |
1262 | if (pis & BIT1) | |
1263 | dsr_change(info); | |
1264 | if (pis & BIT2) | |
1265 | ri_change(info); | |
1266 | } | |
1267 | } | |
d12341f9 JG |
1268 | |
1269 | /* Request bottom half processing if there's something | |
1da177e4 LT |
1270 | * for it to do and the bh is not already running |
1271 | */ | |
1272 | ||
1273 | if (info->pending_bh && !info->bh_running && !info->bh_requested) { | |
d12341f9 | 1274 | if ( debug_level >= DEBUG_LEVEL_ISR ) |
1da177e4 LT |
1275 | printk("%s(%d):%s queueing bh task.\n", |
1276 | __FILE__,__LINE__,info->device_name); | |
1277 | schedule_work(&info->task); | |
0fab6de0 | 1278 | info->bh_requested = true; |
1da177e4 LT |
1279 | } |
1280 | ||
1281 | spin_unlock(&info->lock); | |
eeb46134 | 1282 | tty_kref_put(tty); |
d12341f9 JG |
1283 | |
1284 | if (debug_level >= DEBUG_LEVEL_ISR) | |
1da177e4 | 1285 | printk("%s(%d):mgslpc_isr(%d)exit.\n", |
a6f97b29 | 1286 | __FILE__, __LINE__, info->irq_level); |
1da177e4 LT |
1287 | |
1288 | return IRQ_HANDLED; | |
1289 | } | |
1290 | ||
1291 | /* Initialize and start device. | |
1292 | */ | |
eeb46134 | 1293 | static int startup(MGSLPC_INFO * info, struct tty_struct *tty) |
1da177e4 LT |
1294 | { |
1295 | int retval = 0; | |
d12341f9 | 1296 | |
1da177e4 LT |
1297 | if (debug_level >= DEBUG_LEVEL_INFO) |
1298 | printk("%s(%d):startup(%s)\n",__FILE__,__LINE__,info->device_name); | |
d12341f9 | 1299 | |
eeb46134 | 1300 | if (info->port.flags & ASYNC_INITIALIZED) |
1da177e4 | 1301 | return 0; |
d12341f9 | 1302 | |
1da177e4 LT |
1303 | if (!info->tx_buf) { |
1304 | /* allocate a page of memory for a transmit buffer */ | |
1305 | info->tx_buf = (unsigned char *)get_zeroed_page(GFP_KERNEL); | |
1306 | if (!info->tx_buf) { | |
1307 | printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n", | |
1308 | __FILE__,__LINE__,info->device_name); | |
1309 | return -ENOMEM; | |
1310 | } | |
1311 | } | |
1312 | ||
1313 | info->pending_bh = 0; | |
d12341f9 | 1314 | |
a7482a2e PF |
1315 | memset(&info->icount, 0, sizeof(info->icount)); |
1316 | ||
40565f19 | 1317 | setup_timer(&info->tx_timer, tx_timeout, (unsigned long)info); |
1da177e4 LT |
1318 | |
1319 | /* Allocate and claim adapter resources */ | |
1320 | retval = claim_resources(info); | |
d12341f9 | 1321 | |
1da177e4 LT |
1322 | /* perform existance check and diagnostics */ |
1323 | if ( !retval ) | |
1324 | retval = adapter_test(info); | |
d12341f9 | 1325 | |
1da177e4 | 1326 | if ( retval ) { |
eeb46134 AC |
1327 | if (capable(CAP_SYS_ADMIN) && tty) |
1328 | set_bit(TTY_IO_ERROR, &tty->flags); | |
1da177e4 LT |
1329 | release_resources(info); |
1330 | return retval; | |
1331 | } | |
1332 | ||
1333 | /* program hardware for current parameters */ | |
eeb46134 | 1334 | mgslpc_change_params(info, tty); |
d12341f9 | 1335 | |
eeb46134 AC |
1336 | if (tty) |
1337 | clear_bit(TTY_IO_ERROR, &tty->flags); | |
1da177e4 | 1338 | |
eeb46134 | 1339 | info->port.flags |= ASYNC_INITIALIZED; |
d12341f9 | 1340 | |
1da177e4 LT |
1341 | return 0; |
1342 | } | |
1343 | ||
1344 | /* Called by mgslpc_close() and mgslpc_hangup() to shutdown hardware | |
1345 | */ | |
eeb46134 | 1346 | static void shutdown(MGSLPC_INFO * info, struct tty_struct *tty) |
1da177e4 LT |
1347 | { |
1348 | unsigned long flags; | |
d12341f9 | 1349 | |
eeb46134 | 1350 | if (!(info->port.flags & ASYNC_INITIALIZED)) |
1da177e4 LT |
1351 | return; |
1352 | ||
1353 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1354 | printk("%s(%d):mgslpc_shutdown(%s)\n", | |
1355 | __FILE__,__LINE__, info->device_name ); | |
1356 | ||
1357 | /* clear status wait queue because status changes */ | |
1358 | /* can't happen after shutting down the hardware */ | |
1359 | wake_up_interruptible(&info->status_event_wait_q); | |
1360 | wake_up_interruptible(&info->event_wait_q); | |
1361 | ||
40565f19 | 1362 | del_timer_sync(&info->tx_timer); |
1da177e4 LT |
1363 | |
1364 | if (info->tx_buf) { | |
1365 | free_page((unsigned long) info->tx_buf); | |
1366 | info->tx_buf = NULL; | |
1367 | } | |
1368 | ||
1369 | spin_lock_irqsave(&info->lock,flags); | |
1370 | ||
1371 | rx_stop(info); | |
1372 | tx_stop(info); | |
1373 | ||
1374 | /* TODO:disable interrupts instead of reset to preserve signal states */ | |
1375 | reset_device(info); | |
d12341f9 | 1376 | |
eeb46134 | 1377 | if (!tty || tty->termios->c_cflag & HUPCL) { |
1da177e4 LT |
1378 | info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS); |
1379 | set_signals(info); | |
1380 | } | |
d12341f9 | 1381 | |
1da177e4 LT |
1382 | spin_unlock_irqrestore(&info->lock,flags); |
1383 | ||
d12341f9 JG |
1384 | release_resources(info); |
1385 | ||
eeb46134 AC |
1386 | if (tty) |
1387 | set_bit(TTY_IO_ERROR, &tty->flags); | |
1da177e4 | 1388 | |
eeb46134 | 1389 | info->port.flags &= ~ASYNC_INITIALIZED; |
1da177e4 LT |
1390 | } |
1391 | ||
eeb46134 | 1392 | static void mgslpc_program_hw(MGSLPC_INFO *info, struct tty_struct *tty) |
1da177e4 LT |
1393 | { |
1394 | unsigned long flags; | |
1395 | ||
1396 | spin_lock_irqsave(&info->lock,flags); | |
d12341f9 | 1397 | |
1da177e4 LT |
1398 | rx_stop(info); |
1399 | tx_stop(info); | |
1400 | info->tx_count = info->tx_put = info->tx_get = 0; | |
d12341f9 | 1401 | |
1da177e4 LT |
1402 | if (info->params.mode == MGSL_MODE_HDLC || info->netcount) |
1403 | hdlc_mode(info); | |
1404 | else | |
1405 | async_mode(info); | |
d12341f9 | 1406 | |
1da177e4 | 1407 | set_signals(info); |
d12341f9 | 1408 | |
1da177e4 LT |
1409 | info->dcd_chkcount = 0; |
1410 | info->cts_chkcount = 0; | |
1411 | info->ri_chkcount = 0; | |
1412 | info->dsr_chkcount = 0; | |
1413 | ||
1414 | irq_enable(info, CHB, IRQ_DCD | IRQ_CTS); | |
1415 | port_irq_enable(info, (unsigned char) PVR_DSR | PVR_RI); | |
1416 | get_signals(info); | |
d12341f9 | 1417 | |
eeb46134 | 1418 | if (info->netcount || (tty && (tty->termios->c_cflag & CREAD))) |
1da177e4 | 1419 | rx_start(info); |
d12341f9 | 1420 | |
1da177e4 LT |
1421 | spin_unlock_irqrestore(&info->lock,flags); |
1422 | } | |
1423 | ||
1424 | /* Reconfigure adapter based on new parameters | |
1425 | */ | |
eeb46134 | 1426 | static void mgslpc_change_params(MGSLPC_INFO *info, struct tty_struct *tty) |
1da177e4 LT |
1427 | { |
1428 | unsigned cflag; | |
1429 | int bits_per_char; | |
1430 | ||
eeb46134 | 1431 | if (!tty || !tty->termios) |
1da177e4 | 1432 | return; |
d12341f9 | 1433 | |
1da177e4 LT |
1434 | if (debug_level >= DEBUG_LEVEL_INFO) |
1435 | printk("%s(%d):mgslpc_change_params(%s)\n", | |
1436 | __FILE__,__LINE__, info->device_name ); | |
d12341f9 | 1437 | |
eeb46134 | 1438 | cflag = tty->termios->c_cflag; |
1da177e4 LT |
1439 | |
1440 | /* if B0 rate (hangup) specified then negate DTR and RTS */ | |
1441 | /* otherwise assert DTR and RTS */ | |
1442 | if (cflag & CBAUD) | |
1443 | info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; | |
1444 | else | |
1445 | info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR); | |
d12341f9 | 1446 | |
1da177e4 | 1447 | /* byte size and parity */ |
d12341f9 | 1448 | |
1da177e4 LT |
1449 | switch (cflag & CSIZE) { |
1450 | case CS5: info->params.data_bits = 5; break; | |
1451 | case CS6: info->params.data_bits = 6; break; | |
1452 | case CS7: info->params.data_bits = 7; break; | |
1453 | case CS8: info->params.data_bits = 8; break; | |
1454 | default: info->params.data_bits = 7; break; | |
1455 | } | |
d12341f9 | 1456 | |
1da177e4 LT |
1457 | if (cflag & CSTOPB) |
1458 | info->params.stop_bits = 2; | |
1459 | else | |
1460 | info->params.stop_bits = 1; | |
1461 | ||
1462 | info->params.parity = ASYNC_PARITY_NONE; | |
1463 | if (cflag & PARENB) { | |
1464 | if (cflag & PARODD) | |
1465 | info->params.parity = ASYNC_PARITY_ODD; | |
1466 | else | |
1467 | info->params.parity = ASYNC_PARITY_EVEN; | |
1468 | #ifdef CMSPAR | |
1469 | if (cflag & CMSPAR) | |
1470 | info->params.parity = ASYNC_PARITY_SPACE; | |
1471 | #endif | |
1472 | } | |
1473 | ||
1474 | /* calculate number of jiffies to transmit a full | |
1475 | * FIFO (32 bytes) at specified data rate | |
1476 | */ | |
d12341f9 | 1477 | bits_per_char = info->params.data_bits + |
1da177e4 LT |
1478 | info->params.stop_bits + 1; |
1479 | ||
1480 | /* if port data rate is set to 460800 or less then | |
1481 | * allow tty settings to override, otherwise keep the | |
1482 | * current data rate. | |
1483 | */ | |
1484 | if (info->params.data_rate <= 460800) { | |
eeb46134 | 1485 | info->params.data_rate = tty_get_baud_rate(tty); |
1da177e4 | 1486 | } |
d12341f9 | 1487 | |
1da177e4 | 1488 | if ( info->params.data_rate ) { |
d12341f9 | 1489 | info->timeout = (32*HZ*bits_per_char) / |
1da177e4 LT |
1490 | info->params.data_rate; |
1491 | } | |
1492 | info->timeout += HZ/50; /* Add .02 seconds of slop */ | |
1493 | ||
1494 | if (cflag & CRTSCTS) | |
eeb46134 | 1495 | info->port.flags |= ASYNC_CTS_FLOW; |
1da177e4 | 1496 | else |
eeb46134 | 1497 | info->port.flags &= ~ASYNC_CTS_FLOW; |
d12341f9 | 1498 | |
1da177e4 | 1499 | if (cflag & CLOCAL) |
eeb46134 | 1500 | info->port.flags &= ~ASYNC_CHECK_CD; |
1da177e4 | 1501 | else |
eeb46134 | 1502 | info->port.flags |= ASYNC_CHECK_CD; |
1da177e4 LT |
1503 | |
1504 | /* process tty input control flags */ | |
d12341f9 | 1505 | |
1da177e4 | 1506 | info->read_status_mask = 0; |
eeb46134 | 1507 | if (I_INPCK(tty)) |
1da177e4 | 1508 | info->read_status_mask |= BIT7 | BIT6; |
eeb46134 | 1509 | if (I_IGNPAR(tty)) |
1da177e4 LT |
1510 | info->ignore_status_mask |= BIT7 | BIT6; |
1511 | ||
eeb46134 | 1512 | mgslpc_program_hw(info, tty); |
1da177e4 LT |
1513 | } |
1514 | ||
1515 | /* Add a character to the transmit buffer | |
1516 | */ | |
d7e752e2 | 1517 | static int mgslpc_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 LT |
1518 | { |
1519 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
1520 | unsigned long flags; | |
1521 | ||
1522 | if (debug_level >= DEBUG_LEVEL_INFO) { | |
1523 | printk( "%s(%d):mgslpc_put_char(%d) on %s\n", | |
1524 | __FILE__,__LINE__,ch,info->device_name); | |
1525 | } | |
1526 | ||
1527 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_put_char")) | |
d7e752e2 | 1528 | return 0; |
1da177e4 | 1529 | |
326f28e9 | 1530 | if (!info->tx_buf) |
d7e752e2 | 1531 | return 0; |
1da177e4 LT |
1532 | |
1533 | spin_lock_irqsave(&info->lock,flags); | |
d12341f9 | 1534 | |
1da177e4 LT |
1535 | if (info->params.mode == MGSL_MODE_ASYNC || !info->tx_active) { |
1536 | if (info->tx_count < TXBUFSIZE - 1) { | |
1537 | info->tx_buf[info->tx_put++] = ch; | |
1538 | info->tx_put &= TXBUFSIZE-1; | |
1539 | info->tx_count++; | |
1540 | } | |
1541 | } | |
d12341f9 | 1542 | |
1da177e4 | 1543 | spin_unlock_irqrestore(&info->lock,flags); |
d7e752e2 | 1544 | return 1; |
1da177e4 LT |
1545 | } |
1546 | ||
1547 | /* Enable transmitter so remaining characters in the | |
1548 | * transmit buffer are sent. | |
1549 | */ | |
1550 | static void mgslpc_flush_chars(struct tty_struct *tty) | |
1551 | { | |
1552 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
1553 | unsigned long flags; | |
d12341f9 | 1554 | |
1da177e4 LT |
1555 | if (debug_level >= DEBUG_LEVEL_INFO) |
1556 | printk( "%s(%d):mgslpc_flush_chars() entry on %s tx_count=%d\n", | |
1557 | __FILE__,__LINE__,info->device_name,info->tx_count); | |
d12341f9 | 1558 | |
1da177e4 LT |
1559 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_flush_chars")) |
1560 | return; | |
1561 | ||
1562 | if (info->tx_count <= 0 || tty->stopped || | |
1563 | tty->hw_stopped || !info->tx_buf) | |
1564 | return; | |
1565 | ||
1566 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1567 | printk( "%s(%d):mgslpc_flush_chars() entry on %s starting transmitter\n", | |
1568 | __FILE__,__LINE__,info->device_name); | |
1569 | ||
1570 | spin_lock_irqsave(&info->lock,flags); | |
1571 | if (!info->tx_active) | |
eeb46134 | 1572 | tx_start(info, tty); |
1da177e4 LT |
1573 | spin_unlock_irqrestore(&info->lock,flags); |
1574 | } | |
1575 | ||
1576 | /* Send a block of data | |
d12341f9 | 1577 | * |
1da177e4 | 1578 | * Arguments: |
d12341f9 | 1579 | * |
1da177e4 LT |
1580 | * tty pointer to tty information structure |
1581 | * buf pointer to buffer containing send data | |
1582 | * count size of send data in bytes | |
d12341f9 | 1583 | * |
1da177e4 LT |
1584 | * Returns: number of characters written |
1585 | */ | |
1586 | static int mgslpc_write(struct tty_struct * tty, | |
1587 | const unsigned char *buf, int count) | |
1588 | { | |
1589 | int c, ret = 0; | |
1590 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
1591 | unsigned long flags; | |
d12341f9 | 1592 | |
1da177e4 LT |
1593 | if (debug_level >= DEBUG_LEVEL_INFO) |
1594 | printk( "%s(%d):mgslpc_write(%s) count=%d\n", | |
1595 | __FILE__,__LINE__,info->device_name,count); | |
d12341f9 | 1596 | |
1da177e4 | 1597 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_write") || |
326f28e9 | 1598 | !info->tx_buf) |
1da177e4 LT |
1599 | goto cleanup; |
1600 | ||
1601 | if (info->params.mode == MGSL_MODE_HDLC) { | |
1602 | if (count > TXBUFSIZE) { | |
1603 | ret = -EIO; | |
1604 | goto cleanup; | |
1605 | } | |
1606 | if (info->tx_active) | |
1607 | goto cleanup; | |
1608 | else if (info->tx_count) | |
1609 | goto start; | |
1610 | } | |
1611 | ||
1612 | for (;;) { | |
1613 | c = min(count, | |
1614 | min(TXBUFSIZE - info->tx_count - 1, | |
1615 | TXBUFSIZE - info->tx_put)); | |
1616 | if (c <= 0) | |
1617 | break; | |
d12341f9 | 1618 | |
1da177e4 LT |
1619 | memcpy(info->tx_buf + info->tx_put, buf, c); |
1620 | ||
1621 | spin_lock_irqsave(&info->lock,flags); | |
1622 | info->tx_put = (info->tx_put + c) & (TXBUFSIZE-1); | |
1623 | info->tx_count += c; | |
1624 | spin_unlock_irqrestore(&info->lock,flags); | |
1625 | ||
1626 | buf += c; | |
1627 | count -= c; | |
1628 | ret += c; | |
1629 | } | |
1630 | start: | |
1631 | if (info->tx_count && !tty->stopped && !tty->hw_stopped) { | |
1632 | spin_lock_irqsave(&info->lock,flags); | |
1633 | if (!info->tx_active) | |
eeb46134 | 1634 | tx_start(info, tty); |
1da177e4 LT |
1635 | spin_unlock_irqrestore(&info->lock,flags); |
1636 | } | |
d12341f9 | 1637 | cleanup: |
1da177e4 LT |
1638 | if (debug_level >= DEBUG_LEVEL_INFO) |
1639 | printk( "%s(%d):mgslpc_write(%s) returning=%d\n", | |
1640 | __FILE__,__LINE__,info->device_name,ret); | |
1641 | return ret; | |
1642 | } | |
1643 | ||
1644 | /* Return the count of free bytes in transmit buffer | |
1645 | */ | |
1646 | static int mgslpc_write_room(struct tty_struct *tty) | |
1647 | { | |
1648 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
1649 | int ret; | |
d12341f9 | 1650 | |
1da177e4 LT |
1651 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_write_room")) |
1652 | return 0; | |
1653 | ||
1654 | if (info->params.mode == MGSL_MODE_HDLC) { | |
1655 | /* HDLC (frame oriented) mode */ | |
1656 | if (info->tx_active) | |
1657 | return 0; | |
1658 | else | |
1659 | return HDLC_MAX_FRAME_SIZE; | |
1660 | } else { | |
1661 | ret = TXBUFSIZE - info->tx_count - 1; | |
1662 | if (ret < 0) | |
1663 | ret = 0; | |
1664 | } | |
d12341f9 | 1665 | |
1da177e4 LT |
1666 | if (debug_level >= DEBUG_LEVEL_INFO) |
1667 | printk("%s(%d):mgslpc_write_room(%s)=%d\n", | |
1668 | __FILE__,__LINE__, info->device_name, ret); | |
1669 | return ret; | |
1670 | } | |
1671 | ||
1672 | /* Return the count of bytes in transmit buffer | |
1673 | */ | |
1674 | static int mgslpc_chars_in_buffer(struct tty_struct *tty) | |
1675 | { | |
1676 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
1677 | int rc; | |
d12341f9 | 1678 | |
1da177e4 LT |
1679 | if (debug_level >= DEBUG_LEVEL_INFO) |
1680 | printk("%s(%d):mgslpc_chars_in_buffer(%s)\n", | |
1681 | __FILE__,__LINE__, info->device_name ); | |
d12341f9 | 1682 | |
1da177e4 LT |
1683 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_chars_in_buffer")) |
1684 | return 0; | |
d12341f9 | 1685 | |
1da177e4 LT |
1686 | if (info->params.mode == MGSL_MODE_HDLC) |
1687 | rc = info->tx_active ? info->max_frame_size : 0; | |
1688 | else | |
1689 | rc = info->tx_count; | |
1690 | ||
1691 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1692 | printk("%s(%d):mgslpc_chars_in_buffer(%s)=%d\n", | |
1693 | __FILE__,__LINE__, info->device_name, rc); | |
d12341f9 | 1694 | |
1da177e4 LT |
1695 | return rc; |
1696 | } | |
1697 | ||
1698 | /* Discard all data in the send buffer | |
1699 | */ | |
1700 | static void mgslpc_flush_buffer(struct tty_struct *tty) | |
1701 | { | |
1702 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
1703 | unsigned long flags; | |
d12341f9 | 1704 | |
1da177e4 LT |
1705 | if (debug_level >= DEBUG_LEVEL_INFO) |
1706 | printk("%s(%d):mgslpc_flush_buffer(%s) entry\n", | |
1707 | __FILE__,__LINE__, info->device_name ); | |
d12341f9 | 1708 | |
1da177e4 LT |
1709 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_flush_buffer")) |
1710 | return; | |
d12341f9 JG |
1711 | |
1712 | spin_lock_irqsave(&info->lock,flags); | |
1da177e4 | 1713 | info->tx_count = info->tx_put = info->tx_get = 0; |
d12341f9 | 1714 | del_timer(&info->tx_timer); |
1da177e4 LT |
1715 | spin_unlock_irqrestore(&info->lock,flags); |
1716 | ||
1717 | wake_up_interruptible(&tty->write_wait); | |
1718 | tty_wakeup(tty); | |
1719 | } | |
1720 | ||
1721 | /* Send a high-priority XON/XOFF character | |
1722 | */ | |
1723 | static void mgslpc_send_xchar(struct tty_struct *tty, char ch) | |
1724 | { | |
1725 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
1726 | unsigned long flags; | |
1727 | ||
1728 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1729 | printk("%s(%d):mgslpc_send_xchar(%s,%d)\n", | |
1730 | __FILE__,__LINE__, info->device_name, ch ); | |
d12341f9 | 1731 | |
1da177e4 LT |
1732 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_send_xchar")) |
1733 | return; | |
1734 | ||
1735 | info->x_char = ch; | |
1736 | if (ch) { | |
1737 | spin_lock_irqsave(&info->lock,flags); | |
1738 | if (!info->tx_enabled) | |
eeb46134 | 1739 | tx_start(info, tty); |
1da177e4 LT |
1740 | spin_unlock_irqrestore(&info->lock,flags); |
1741 | } | |
1742 | } | |
1743 | ||
1744 | /* Signal remote device to throttle send data (our receive data) | |
1745 | */ | |
1746 | static void mgslpc_throttle(struct tty_struct * tty) | |
1747 | { | |
1748 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
1749 | unsigned long flags; | |
d12341f9 | 1750 | |
1da177e4 LT |
1751 | if (debug_level >= DEBUG_LEVEL_INFO) |
1752 | printk("%s(%d):mgslpc_throttle(%s) entry\n", | |
1753 | __FILE__,__LINE__, info->device_name ); | |
1754 | ||
1755 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_throttle")) | |
1756 | return; | |
d12341f9 | 1757 | |
1da177e4 LT |
1758 | if (I_IXOFF(tty)) |
1759 | mgslpc_send_xchar(tty, STOP_CHAR(tty)); | |
d12341f9 | 1760 | |
1da177e4 LT |
1761 | if (tty->termios->c_cflag & CRTSCTS) { |
1762 | spin_lock_irqsave(&info->lock,flags); | |
1763 | info->serial_signals &= ~SerialSignal_RTS; | |
1764 | set_signals(info); | |
1765 | spin_unlock_irqrestore(&info->lock,flags); | |
1766 | } | |
1767 | } | |
1768 | ||
1769 | /* Signal remote device to stop throttling send data (our receive data) | |
1770 | */ | |
1771 | static void mgslpc_unthrottle(struct tty_struct * tty) | |
1772 | { | |
1773 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
1774 | unsigned long flags; | |
d12341f9 | 1775 | |
1da177e4 LT |
1776 | if (debug_level >= DEBUG_LEVEL_INFO) |
1777 | printk("%s(%d):mgslpc_unthrottle(%s) entry\n", | |
1778 | __FILE__,__LINE__, info->device_name ); | |
1779 | ||
1780 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_unthrottle")) | |
1781 | return; | |
d12341f9 | 1782 | |
1da177e4 LT |
1783 | if (I_IXOFF(tty)) { |
1784 | if (info->x_char) | |
1785 | info->x_char = 0; | |
1786 | else | |
1787 | mgslpc_send_xchar(tty, START_CHAR(tty)); | |
1788 | } | |
d12341f9 | 1789 | |
1da177e4 LT |
1790 | if (tty->termios->c_cflag & CRTSCTS) { |
1791 | spin_lock_irqsave(&info->lock,flags); | |
1792 | info->serial_signals |= SerialSignal_RTS; | |
1793 | set_signals(info); | |
1794 | spin_unlock_irqrestore(&info->lock,flags); | |
1795 | } | |
1796 | } | |
1797 | ||
1798 | /* get the current serial statistics | |
1799 | */ | |
1800 | static int get_stats(MGSLPC_INFO * info, struct mgsl_icount __user *user_icount) | |
1801 | { | |
1802 | int err; | |
1803 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1804 | printk("get_params(%s)\n", info->device_name); | |
a7482a2e PF |
1805 | if (!user_icount) { |
1806 | memset(&info->icount, 0, sizeof(info->icount)); | |
1807 | } else { | |
1808 | COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount)); | |
1809 | if (err) | |
1810 | return -EFAULT; | |
1811 | } | |
1da177e4 LT |
1812 | return 0; |
1813 | } | |
1814 | ||
1815 | /* get the current serial parameters | |
1816 | */ | |
1817 | static int get_params(MGSLPC_INFO * info, MGSL_PARAMS __user *user_params) | |
1818 | { | |
1819 | int err; | |
1820 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1821 | printk("get_params(%s)\n", info->device_name); | |
1822 | COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS)); | |
1823 | if (err) | |
1824 | return -EFAULT; | |
1825 | return 0; | |
1826 | } | |
1827 | ||
1828 | /* set the serial parameters | |
d12341f9 | 1829 | * |
1da177e4 | 1830 | * Arguments: |
d12341f9 | 1831 | * |
1da177e4 LT |
1832 | * info pointer to device instance data |
1833 | * new_params user buffer containing new serial params | |
1834 | * | |
1835 | * Returns: 0 if success, otherwise error code | |
1836 | */ | |
eeb46134 | 1837 | static int set_params(MGSLPC_INFO * info, MGSL_PARAMS __user *new_params, struct tty_struct *tty) |
1da177e4 LT |
1838 | { |
1839 | unsigned long flags; | |
1840 | MGSL_PARAMS tmp_params; | |
1841 | int err; | |
d12341f9 | 1842 | |
1da177e4 LT |
1843 | if (debug_level >= DEBUG_LEVEL_INFO) |
1844 | printk("%s(%d):set_params %s\n", __FILE__,__LINE__, | |
1845 | info->device_name ); | |
1846 | COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS)); | |
1847 | if (err) { | |
1848 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
1849 | printk( "%s(%d):set_params(%s) user buffer copy failed\n", | |
1850 | __FILE__,__LINE__,info->device_name); | |
1851 | return -EFAULT; | |
1852 | } | |
d12341f9 | 1853 | |
1da177e4 LT |
1854 | spin_lock_irqsave(&info->lock,flags); |
1855 | memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS)); | |
1856 | spin_unlock_irqrestore(&info->lock,flags); | |
d12341f9 | 1857 | |
eeb46134 | 1858 | mgslpc_change_params(info, tty); |
d12341f9 | 1859 | |
1da177e4 LT |
1860 | return 0; |
1861 | } | |
1862 | ||
1863 | static int get_txidle(MGSLPC_INFO * info, int __user *idle_mode) | |
1864 | { | |
1865 | int err; | |
1866 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1867 | printk("get_txidle(%s)=%d\n", info->device_name, info->idle_mode); | |
1868 | COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int)); | |
1869 | if (err) | |
1870 | return -EFAULT; | |
1871 | return 0; | |
1872 | } | |
1873 | ||
1874 | static int set_txidle(MGSLPC_INFO * info, int idle_mode) | |
1875 | { | |
1876 | unsigned long flags; | |
1877 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1878 | printk("set_txidle(%s,%d)\n", info->device_name, idle_mode); | |
1879 | spin_lock_irqsave(&info->lock,flags); | |
1880 | info->idle_mode = idle_mode; | |
1881 | tx_set_idle(info); | |
1882 | spin_unlock_irqrestore(&info->lock,flags); | |
1883 | return 0; | |
1884 | } | |
1885 | ||
1886 | static int get_interface(MGSLPC_INFO * info, int __user *if_mode) | |
1887 | { | |
1888 | int err; | |
1889 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1890 | printk("get_interface(%s)=%d\n", info->device_name, info->if_mode); | |
1891 | COPY_TO_USER(err,if_mode, &info->if_mode, sizeof(int)); | |
1892 | if (err) | |
1893 | return -EFAULT; | |
1894 | return 0; | |
1895 | } | |
1896 | ||
1897 | static int set_interface(MGSLPC_INFO * info, int if_mode) | |
1898 | { | |
1899 | unsigned long flags; | |
1900 | unsigned char val; | |
1901 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1902 | printk("set_interface(%s,%d)\n", info->device_name, if_mode); | |
1903 | spin_lock_irqsave(&info->lock,flags); | |
1904 | info->if_mode = if_mode; | |
1905 | ||
1906 | val = read_reg(info, PVR) & 0x0f; | |
1907 | switch (info->if_mode) | |
1908 | { | |
1909 | case MGSL_INTERFACE_RS232: val |= PVR_RS232; break; | |
1910 | case MGSL_INTERFACE_V35: val |= PVR_V35; break; | |
1911 | case MGSL_INTERFACE_RS422: val |= PVR_RS422; break; | |
1912 | } | |
1913 | write_reg(info, PVR, val); | |
1914 | ||
1915 | spin_unlock_irqrestore(&info->lock,flags); | |
1916 | return 0; | |
1917 | } | |
1918 | ||
eeb46134 | 1919 | static int set_txenable(MGSLPC_INFO * info, int enable, struct tty_struct *tty) |
1da177e4 LT |
1920 | { |
1921 | unsigned long flags; | |
d12341f9 | 1922 | |
1da177e4 LT |
1923 | if (debug_level >= DEBUG_LEVEL_INFO) |
1924 | printk("set_txenable(%s,%d)\n", info->device_name, enable); | |
d12341f9 | 1925 | |
1da177e4 LT |
1926 | spin_lock_irqsave(&info->lock,flags); |
1927 | if (enable) { | |
1928 | if (!info->tx_enabled) | |
eeb46134 | 1929 | tx_start(info, tty); |
1da177e4 LT |
1930 | } else { |
1931 | if (info->tx_enabled) | |
1932 | tx_stop(info); | |
1933 | } | |
1934 | spin_unlock_irqrestore(&info->lock,flags); | |
1935 | return 0; | |
1936 | } | |
1937 | ||
1938 | static int tx_abort(MGSLPC_INFO * info) | |
1939 | { | |
1940 | unsigned long flags; | |
d12341f9 | 1941 | |
1da177e4 LT |
1942 | if (debug_level >= DEBUG_LEVEL_INFO) |
1943 | printk("tx_abort(%s)\n", info->device_name); | |
d12341f9 | 1944 | |
1da177e4 LT |
1945 | spin_lock_irqsave(&info->lock,flags); |
1946 | if (info->tx_active && info->tx_count && | |
1947 | info->params.mode == MGSL_MODE_HDLC) { | |
1948 | /* clear data count so FIFO is not filled on next IRQ. | |
1949 | * This results in underrun and abort transmission. | |
1950 | */ | |
1951 | info->tx_count = info->tx_put = info->tx_get = 0; | |
0fab6de0 | 1952 | info->tx_aborting = true; |
1da177e4 LT |
1953 | } |
1954 | spin_unlock_irqrestore(&info->lock,flags); | |
1955 | return 0; | |
1956 | } | |
1957 | ||
1958 | static int set_rxenable(MGSLPC_INFO * info, int enable) | |
1959 | { | |
1960 | unsigned long flags; | |
d12341f9 | 1961 | |
1da177e4 LT |
1962 | if (debug_level >= DEBUG_LEVEL_INFO) |
1963 | printk("set_rxenable(%s,%d)\n", info->device_name, enable); | |
d12341f9 | 1964 | |
1da177e4 LT |
1965 | spin_lock_irqsave(&info->lock,flags); |
1966 | if (enable) { | |
1967 | if (!info->rx_enabled) | |
1968 | rx_start(info); | |
1969 | } else { | |
1970 | if (info->rx_enabled) | |
1971 | rx_stop(info); | |
1972 | } | |
1973 | spin_unlock_irqrestore(&info->lock,flags); | |
1974 | return 0; | |
1975 | } | |
1976 | ||
1977 | /* wait for specified event to occur | |
d12341f9 | 1978 | * |
1da177e4 LT |
1979 | * Arguments: info pointer to device instance data |
1980 | * mask pointer to bitmask of events to wait for | |
1981 | * Return Value: 0 if successful and bit mask updated with | |
1982 | * of events triggerred, | |
1983 | * otherwise error code | |
1984 | */ | |
1985 | static int wait_events(MGSLPC_INFO * info, int __user *mask_ptr) | |
1986 | { | |
1987 | unsigned long flags; | |
1988 | int s; | |
1989 | int rc=0; | |
1990 | struct mgsl_icount cprev, cnow; | |
1991 | int events; | |
1992 | int mask; | |
1993 | struct _input_signal_events oldsigs, newsigs; | |
1994 | DECLARE_WAITQUEUE(wait, current); | |
1995 | ||
1996 | COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int)); | |
1997 | if (rc) | |
1998 | return -EFAULT; | |
d12341f9 | 1999 | |
1da177e4 LT |
2000 | if (debug_level >= DEBUG_LEVEL_INFO) |
2001 | printk("wait_events(%s,%d)\n", info->device_name, mask); | |
2002 | ||
2003 | spin_lock_irqsave(&info->lock,flags); | |
2004 | ||
2005 | /* return immediately if state matches requested events */ | |
2006 | get_signals(info); | |
2007 | s = info->serial_signals; | |
2008 | events = mask & | |
2009 | ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) + | |
2010 | ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) + | |
2011 | ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) + | |
2012 | ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) ); | |
2013 | if (events) { | |
2014 | spin_unlock_irqrestore(&info->lock,flags); | |
2015 | goto exit; | |
2016 | } | |
2017 | ||
2018 | /* save current irq counts */ | |
2019 | cprev = info->icount; | |
2020 | oldsigs = info->input_signal_events; | |
d12341f9 | 2021 | |
1da177e4 LT |
2022 | if ((info->params.mode == MGSL_MODE_HDLC) && |
2023 | (mask & MgslEvent_ExitHuntMode)) | |
2024 | irq_enable(info, CHA, IRQ_EXITHUNT); | |
d12341f9 | 2025 | |
1da177e4 LT |
2026 | set_current_state(TASK_INTERRUPTIBLE); |
2027 | add_wait_queue(&info->event_wait_q, &wait); | |
d12341f9 | 2028 | |
1da177e4 | 2029 | spin_unlock_irqrestore(&info->lock,flags); |
d12341f9 JG |
2030 | |
2031 | ||
1da177e4 LT |
2032 | for(;;) { |
2033 | schedule(); | |
2034 | if (signal_pending(current)) { | |
2035 | rc = -ERESTARTSYS; | |
2036 | break; | |
2037 | } | |
d12341f9 | 2038 | |
1da177e4 LT |
2039 | /* get current irq counts */ |
2040 | spin_lock_irqsave(&info->lock,flags); | |
2041 | cnow = info->icount; | |
2042 | newsigs = info->input_signal_events; | |
2043 | set_current_state(TASK_INTERRUPTIBLE); | |
2044 | spin_unlock_irqrestore(&info->lock,flags); | |
2045 | ||
2046 | /* if no change, wait aborted for some reason */ | |
2047 | if (newsigs.dsr_up == oldsigs.dsr_up && | |
2048 | newsigs.dsr_down == oldsigs.dsr_down && | |
2049 | newsigs.dcd_up == oldsigs.dcd_up && | |
2050 | newsigs.dcd_down == oldsigs.dcd_down && | |
2051 | newsigs.cts_up == oldsigs.cts_up && | |
2052 | newsigs.cts_down == oldsigs.cts_down && | |
2053 | newsigs.ri_up == oldsigs.ri_up && | |
2054 | newsigs.ri_down == oldsigs.ri_down && | |
2055 | cnow.exithunt == cprev.exithunt && | |
2056 | cnow.rxidle == cprev.rxidle) { | |
2057 | rc = -EIO; | |
2058 | break; | |
2059 | } | |
2060 | ||
2061 | events = mask & | |
2062 | ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) + | |
2063 | (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) + | |
2064 | (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) + | |
2065 | (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) + | |
2066 | (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) + | |
2067 | (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) + | |
2068 | (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) + | |
2069 | (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) + | |
2070 | (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) + | |
2071 | (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) ); | |
2072 | if (events) | |
2073 | break; | |
d12341f9 | 2074 | |
1da177e4 LT |
2075 | cprev = cnow; |
2076 | oldsigs = newsigs; | |
2077 | } | |
d12341f9 | 2078 | |
1da177e4 LT |
2079 | remove_wait_queue(&info->event_wait_q, &wait); |
2080 | set_current_state(TASK_RUNNING); | |
2081 | ||
2082 | if (mask & MgslEvent_ExitHuntMode) { | |
2083 | spin_lock_irqsave(&info->lock,flags); | |
2084 | if (!waitqueue_active(&info->event_wait_q)) | |
2085 | irq_disable(info, CHA, IRQ_EXITHUNT); | |
2086 | spin_unlock_irqrestore(&info->lock,flags); | |
2087 | } | |
2088 | exit: | |
2089 | if (rc == 0) | |
2090 | PUT_USER(rc, events, mask_ptr); | |
2091 | return rc; | |
2092 | } | |
2093 | ||
2094 | static int modem_input_wait(MGSLPC_INFO *info,int arg) | |
2095 | { | |
2096 | unsigned long flags; | |
2097 | int rc; | |
2098 | struct mgsl_icount cprev, cnow; | |
2099 | DECLARE_WAITQUEUE(wait, current); | |
2100 | ||
2101 | /* save current irq counts */ | |
2102 | spin_lock_irqsave(&info->lock,flags); | |
2103 | cprev = info->icount; | |
2104 | add_wait_queue(&info->status_event_wait_q, &wait); | |
2105 | set_current_state(TASK_INTERRUPTIBLE); | |
2106 | spin_unlock_irqrestore(&info->lock,flags); | |
2107 | ||
2108 | for(;;) { | |
2109 | schedule(); | |
2110 | if (signal_pending(current)) { | |
2111 | rc = -ERESTARTSYS; | |
2112 | break; | |
2113 | } | |
2114 | ||
2115 | /* get new irq counts */ | |
2116 | spin_lock_irqsave(&info->lock,flags); | |
2117 | cnow = info->icount; | |
2118 | set_current_state(TASK_INTERRUPTIBLE); | |
2119 | spin_unlock_irqrestore(&info->lock,flags); | |
2120 | ||
2121 | /* if no change, wait aborted for some reason */ | |
2122 | if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && | |
2123 | cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) { | |
2124 | rc = -EIO; | |
2125 | break; | |
2126 | } | |
2127 | ||
2128 | /* check for change in caller specified modem input */ | |
2129 | if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) || | |
2130 | (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) || | |
2131 | (arg & TIOCM_CD && cnow.dcd != cprev.dcd) || | |
2132 | (arg & TIOCM_CTS && cnow.cts != cprev.cts)) { | |
2133 | rc = 0; | |
2134 | break; | |
2135 | } | |
2136 | ||
2137 | cprev = cnow; | |
2138 | } | |
2139 | remove_wait_queue(&info->status_event_wait_q, &wait); | |
2140 | set_current_state(TASK_RUNNING); | |
2141 | return rc; | |
2142 | } | |
2143 | ||
2144 | /* return the state of the serial control and status signals | |
2145 | */ | |
2146 | static int tiocmget(struct tty_struct *tty, struct file *file) | |
2147 | { | |
2148 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
2149 | unsigned int result; | |
2150 | unsigned long flags; | |
2151 | ||
2152 | spin_lock_irqsave(&info->lock,flags); | |
2153 | get_signals(info); | |
2154 | spin_unlock_irqrestore(&info->lock,flags); | |
2155 | ||
2156 | result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS:0) + | |
2157 | ((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR:0) + | |
2158 | ((info->serial_signals & SerialSignal_DCD) ? TIOCM_CAR:0) + | |
2159 | ((info->serial_signals & SerialSignal_RI) ? TIOCM_RNG:0) + | |
2160 | ((info->serial_signals & SerialSignal_DSR) ? TIOCM_DSR:0) + | |
2161 | ((info->serial_signals & SerialSignal_CTS) ? TIOCM_CTS:0); | |
2162 | ||
2163 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2164 | printk("%s(%d):%s tiocmget() value=%08X\n", | |
2165 | __FILE__,__LINE__, info->device_name, result ); | |
2166 | return result; | |
2167 | } | |
2168 | ||
2169 | /* set modem control signals (DTR/RTS) | |
2170 | */ | |
2171 | static int tiocmset(struct tty_struct *tty, struct file *file, | |
2172 | unsigned int set, unsigned int clear) | |
2173 | { | |
2174 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
2175 | unsigned long flags; | |
2176 | ||
2177 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2178 | printk("%s(%d):%s tiocmset(%x,%x)\n", | |
2179 | __FILE__,__LINE__,info->device_name, set, clear); | |
2180 | ||
2181 | if (set & TIOCM_RTS) | |
2182 | info->serial_signals |= SerialSignal_RTS; | |
2183 | if (set & TIOCM_DTR) | |
2184 | info->serial_signals |= SerialSignal_DTR; | |
2185 | if (clear & TIOCM_RTS) | |
2186 | info->serial_signals &= ~SerialSignal_RTS; | |
2187 | if (clear & TIOCM_DTR) | |
2188 | info->serial_signals &= ~SerialSignal_DTR; | |
2189 | ||
2190 | spin_lock_irqsave(&info->lock,flags); | |
2191 | set_signals(info); | |
2192 | spin_unlock_irqrestore(&info->lock,flags); | |
2193 | ||
2194 | return 0; | |
2195 | } | |
2196 | ||
2197 | /* Set or clear transmit break condition | |
2198 | * | |
2199 | * Arguments: tty pointer to tty instance data | |
2200 | * break_state -1=set break condition, 0=clear | |
2201 | */ | |
9e98966c | 2202 | static int mgslpc_break(struct tty_struct *tty, int break_state) |
1da177e4 LT |
2203 | { |
2204 | MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; | |
2205 | unsigned long flags; | |
d12341f9 | 2206 | |
1da177e4 LT |
2207 | if (debug_level >= DEBUG_LEVEL_INFO) |
2208 | printk("%s(%d):mgslpc_break(%s,%d)\n", | |
2209 | __FILE__,__LINE__, info->device_name, break_state); | |
d12341f9 | 2210 | |
1da177e4 | 2211 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_break")) |
9e98966c | 2212 | return -EINVAL; |
1da177e4 LT |
2213 | |
2214 | spin_lock_irqsave(&info->lock,flags); | |
2215 | if (break_state == -1) | |
2216 | set_reg_bits(info, CHA+DAFO, BIT6); | |
d12341f9 | 2217 | else |
1da177e4 LT |
2218 | clear_reg_bits(info, CHA+DAFO, BIT6); |
2219 | spin_unlock_irqrestore(&info->lock,flags); | |
9e98966c | 2220 | return 0; |
1da177e4 LT |
2221 | } |
2222 | ||
2223 | /* Service an IOCTL request | |
d12341f9 | 2224 | * |
1da177e4 | 2225 | * Arguments: |
d12341f9 | 2226 | * |
1da177e4 LT |
2227 | * tty pointer to tty instance data |
2228 | * file pointer to associated file object for device | |
2229 | * cmd IOCTL command code | |
2230 | * arg command argument/context | |
d12341f9 | 2231 | * |
1da177e4 LT |
2232 | * Return Value: 0 if success, otherwise error code |
2233 | */ | |
2234 | static int mgslpc_ioctl(struct tty_struct *tty, struct file * file, | |
2235 | unsigned int cmd, unsigned long arg) | |
2236 | { | |
2237 | MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; | |
eeb46134 AC |
2238 | int error; |
2239 | struct mgsl_icount cnow; /* kernel counter temps */ | |
2240 | struct serial_icounter_struct __user *p_cuser; /* user space */ | |
2241 | void __user *argp = (void __user *)arg; | |
2242 | unsigned long flags; | |
d12341f9 | 2243 | |
1da177e4 LT |
2244 | if (debug_level >= DEBUG_LEVEL_INFO) |
2245 | printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__,__LINE__, | |
2246 | info->device_name, cmd ); | |
d12341f9 | 2247 | |
1da177e4 LT |
2248 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_ioctl")) |
2249 | return -ENODEV; | |
2250 | ||
2251 | if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && | |
2252 | (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) { | |
2253 | if (tty->flags & (1 << TTY_IO_ERROR)) | |
2254 | return -EIO; | |
2255 | } | |
2256 | ||
1da177e4 LT |
2257 | switch (cmd) { |
2258 | case MGSL_IOCGPARAMS: | |
2259 | return get_params(info, argp); | |
2260 | case MGSL_IOCSPARAMS: | |
eeb46134 | 2261 | return set_params(info, argp, tty); |
1da177e4 LT |
2262 | case MGSL_IOCGTXIDLE: |
2263 | return get_txidle(info, argp); | |
2264 | case MGSL_IOCSTXIDLE: | |
2265 | return set_txidle(info, (int)arg); | |
2266 | case MGSL_IOCGIF: | |
2267 | return get_interface(info, argp); | |
2268 | case MGSL_IOCSIF: | |
2269 | return set_interface(info,(int)arg); | |
2270 | case MGSL_IOCTXENABLE: | |
eeb46134 | 2271 | return set_txenable(info,(int)arg, tty); |
1da177e4 LT |
2272 | case MGSL_IOCRXENABLE: |
2273 | return set_rxenable(info,(int)arg); | |
2274 | case MGSL_IOCTXABORT: | |
2275 | return tx_abort(info); | |
2276 | case MGSL_IOCGSTATS: | |
2277 | return get_stats(info, argp); | |
2278 | case MGSL_IOCWAITEVENT: | |
2279 | return wait_events(info, argp); | |
2280 | case TIOCMIWAIT: | |
2281 | return modem_input_wait(info,(int)arg); | |
2282 | case TIOCGICOUNT: | |
2283 | spin_lock_irqsave(&info->lock,flags); | |
2284 | cnow = info->icount; | |
2285 | spin_unlock_irqrestore(&info->lock,flags); | |
2286 | p_cuser = argp; | |
2287 | PUT_USER(error,cnow.cts, &p_cuser->cts); | |
2288 | if (error) return error; | |
2289 | PUT_USER(error,cnow.dsr, &p_cuser->dsr); | |
2290 | if (error) return error; | |
2291 | PUT_USER(error,cnow.rng, &p_cuser->rng); | |
2292 | if (error) return error; | |
2293 | PUT_USER(error,cnow.dcd, &p_cuser->dcd); | |
2294 | if (error) return error; | |
2295 | PUT_USER(error,cnow.rx, &p_cuser->rx); | |
2296 | if (error) return error; | |
2297 | PUT_USER(error,cnow.tx, &p_cuser->tx); | |
2298 | if (error) return error; | |
2299 | PUT_USER(error,cnow.frame, &p_cuser->frame); | |
2300 | if (error) return error; | |
2301 | PUT_USER(error,cnow.overrun, &p_cuser->overrun); | |
2302 | if (error) return error; | |
2303 | PUT_USER(error,cnow.parity, &p_cuser->parity); | |
2304 | if (error) return error; | |
2305 | PUT_USER(error,cnow.brk, &p_cuser->brk); | |
2306 | if (error) return error; | |
2307 | PUT_USER(error,cnow.buf_overrun, &p_cuser->buf_overrun); | |
2308 | if (error) return error; | |
2309 | return 0; | |
2310 | default: | |
2311 | return -ENOIOCTLCMD; | |
2312 | } | |
2313 | return 0; | |
2314 | } | |
2315 | ||
2316 | /* Set new termios settings | |
d12341f9 | 2317 | * |
1da177e4 | 2318 | * Arguments: |
d12341f9 | 2319 | * |
1da177e4 LT |
2320 | * tty pointer to tty structure |
2321 | * termios pointer to buffer to hold returned old termios | |
2322 | */ | |
606d099c | 2323 | static void mgslpc_set_termios(struct tty_struct *tty, struct ktermios *old_termios) |
1da177e4 LT |
2324 | { |
2325 | MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data; | |
2326 | unsigned long flags; | |
d12341f9 | 2327 | |
1da177e4 LT |
2328 | if (debug_level >= DEBUG_LEVEL_INFO) |
2329 | printk("%s(%d):mgslpc_set_termios %s\n", __FILE__,__LINE__, | |
2330 | tty->driver->name ); | |
d12341f9 | 2331 | |
1da177e4 LT |
2332 | /* just return if nothing has changed */ |
2333 | if ((tty->termios->c_cflag == old_termios->c_cflag) | |
d12341f9 | 2334 | && (RELEVANT_IFLAG(tty->termios->c_iflag) |
1da177e4 LT |
2335 | == RELEVANT_IFLAG(old_termios->c_iflag))) |
2336 | return; | |
2337 | ||
eeb46134 | 2338 | mgslpc_change_params(info, tty); |
1da177e4 LT |
2339 | |
2340 | /* Handle transition to B0 status */ | |
2341 | if (old_termios->c_cflag & CBAUD && | |
2342 | !(tty->termios->c_cflag & CBAUD)) { | |
2343 | info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR); | |
2344 | spin_lock_irqsave(&info->lock,flags); | |
2345 | set_signals(info); | |
2346 | spin_unlock_irqrestore(&info->lock,flags); | |
2347 | } | |
d12341f9 | 2348 | |
1da177e4 LT |
2349 | /* Handle transition away from B0 status */ |
2350 | if (!(old_termios->c_cflag & CBAUD) && | |
2351 | tty->termios->c_cflag & CBAUD) { | |
2352 | info->serial_signals |= SerialSignal_DTR; | |
d12341f9 | 2353 | if (!(tty->termios->c_cflag & CRTSCTS) || |
1da177e4 LT |
2354 | !test_bit(TTY_THROTTLED, &tty->flags)) { |
2355 | info->serial_signals |= SerialSignal_RTS; | |
2356 | } | |
2357 | spin_lock_irqsave(&info->lock,flags); | |
2358 | set_signals(info); | |
2359 | spin_unlock_irqrestore(&info->lock,flags); | |
2360 | } | |
d12341f9 | 2361 | |
1da177e4 LT |
2362 | /* Handle turning off CRTSCTS */ |
2363 | if (old_termios->c_cflag & CRTSCTS && | |
2364 | !(tty->termios->c_cflag & CRTSCTS)) { | |
2365 | tty->hw_stopped = 0; | |
2366 | tx_release(tty); | |
2367 | } | |
2368 | } | |
2369 | ||
2370 | static void mgslpc_close(struct tty_struct *tty, struct file * filp) | |
2371 | { | |
2372 | MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; | |
eeb46134 | 2373 | struct tty_port *port = &info->port; |
1da177e4 LT |
2374 | |
2375 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_close")) | |
2376 | return; | |
d12341f9 | 2377 | |
1da177e4 LT |
2378 | if (debug_level >= DEBUG_LEVEL_INFO) |
2379 | printk("%s(%d):mgslpc_close(%s) entry, count=%d\n", | |
eeb46134 | 2380 | __FILE__,__LINE__, info->device_name, port->count); |
1da177e4 | 2381 | |
eeb46134 | 2382 | WARN_ON(!port->count); |
d12341f9 | 2383 | |
eeb46134 | 2384 | if (tty_port_close_start(port, tty, filp) == 0) |
1da177e4 | 2385 | goto cleanup; |
d12341f9 | 2386 | |
eeb46134 | 2387 | if (port->flags & ASYNC_INITIALIZED) |
1da177e4 LT |
2388 | mgslpc_wait_until_sent(tty, info->timeout); |
2389 | ||
978e595f | 2390 | mgslpc_flush_buffer(tty); |
1da177e4 | 2391 | |
978e595f | 2392 | tty_ldisc_flush(tty); |
eeb46134 AC |
2393 | shutdown(info, tty); |
2394 | ||
2395 | tty_port_close_end(port, tty); | |
2396 | tty_port_tty_set(port, NULL); | |
d12341f9 | 2397 | cleanup: |
1da177e4 LT |
2398 | if (debug_level >= DEBUG_LEVEL_INFO) |
2399 | printk("%s(%d):mgslpc_close(%s) exit, count=%d\n", __FILE__,__LINE__, | |
eeb46134 | 2400 | tty->driver->name, port->count); |
1da177e4 LT |
2401 | } |
2402 | ||
2403 | /* Wait until the transmitter is empty. | |
2404 | */ | |
2405 | static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout) | |
2406 | { | |
2407 | MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; | |
2408 | unsigned long orig_jiffies, char_time; | |
2409 | ||
2410 | if (!info ) | |
2411 | return; | |
2412 | ||
2413 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2414 | printk("%s(%d):mgslpc_wait_until_sent(%s) entry\n", | |
2415 | __FILE__,__LINE__, info->device_name ); | |
d12341f9 | 2416 | |
1da177e4 LT |
2417 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_wait_until_sent")) |
2418 | return; | |
2419 | ||
eeb46134 | 2420 | if (!(info->port.flags & ASYNC_INITIALIZED)) |
1da177e4 | 2421 | goto exit; |
d12341f9 | 2422 | |
1da177e4 | 2423 | orig_jiffies = jiffies; |
d12341f9 | 2424 | |
1da177e4 LT |
2425 | /* Set check interval to 1/5 of estimated time to |
2426 | * send a character, and make it at least 1. The check | |
2427 | * interval should also be less than the timeout. | |
2428 | * Note: use tight timings here to satisfy the NIST-PCTS. | |
d12341f9 JG |
2429 | */ |
2430 | ||
1da177e4 LT |
2431 | if ( info->params.data_rate ) { |
2432 | char_time = info->timeout/(32 * 5); | |
2433 | if (!char_time) | |
2434 | char_time++; | |
2435 | } else | |
2436 | char_time = 1; | |
d12341f9 | 2437 | |
1da177e4 LT |
2438 | if (timeout) |
2439 | char_time = min_t(unsigned long, char_time, timeout); | |
d12341f9 | 2440 | |
1da177e4 LT |
2441 | if (info->params.mode == MGSL_MODE_HDLC) { |
2442 | while (info->tx_active) { | |
2443 | msleep_interruptible(jiffies_to_msecs(char_time)); | |
2444 | if (signal_pending(current)) | |
2445 | break; | |
2446 | if (timeout && time_after(jiffies, orig_jiffies + timeout)) | |
2447 | break; | |
2448 | } | |
2449 | } else { | |
2450 | while ((info->tx_count || info->tx_active) && | |
2451 | info->tx_enabled) { | |
2452 | msleep_interruptible(jiffies_to_msecs(char_time)); | |
2453 | if (signal_pending(current)) | |
2454 | break; | |
2455 | if (timeout && time_after(jiffies, orig_jiffies + timeout)) | |
2456 | break; | |
2457 | } | |
2458 | } | |
d12341f9 | 2459 | |
1da177e4 LT |
2460 | exit: |
2461 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2462 | printk("%s(%d):mgslpc_wait_until_sent(%s) exit\n", | |
2463 | __FILE__,__LINE__, info->device_name ); | |
2464 | } | |
2465 | ||
2466 | /* Called by tty_hangup() when a hangup is signaled. | |
2467 | * This is the same as closing all open files for the port. | |
2468 | */ | |
2469 | static void mgslpc_hangup(struct tty_struct *tty) | |
2470 | { | |
2471 | MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data; | |
d12341f9 | 2472 | |
1da177e4 LT |
2473 | if (debug_level >= DEBUG_LEVEL_INFO) |
2474 | printk("%s(%d):mgslpc_hangup(%s)\n", | |
2475 | __FILE__,__LINE__, info->device_name ); | |
d12341f9 | 2476 | |
1da177e4 LT |
2477 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_hangup")) |
2478 | return; | |
2479 | ||
2480 | mgslpc_flush_buffer(tty); | |
eeb46134 AC |
2481 | shutdown(info, tty); |
2482 | tty_port_hangup(&info->port); | |
1da177e4 LT |
2483 | } |
2484 | ||
eeb46134 | 2485 | static int carrier_raised(struct tty_port *port) |
1da177e4 | 2486 | { |
eeb46134 AC |
2487 | MGSLPC_INFO *info = container_of(port, MGSLPC_INFO, port); |
2488 | unsigned long flags; | |
d12341f9 | 2489 | |
eeb46134 AC |
2490 | spin_lock_irqsave(&info->lock,flags); |
2491 | get_signals(info); | |
2492 | spin_unlock_irqrestore(&info->lock,flags); | |
d12341f9 | 2493 | |
eeb46134 AC |
2494 | if (info->serial_signals & SerialSignal_DCD) |
2495 | return 1; | |
2496 | return 0; | |
2497 | } | |
d12341f9 | 2498 | |
fcc8ac18 | 2499 | static void dtr_rts(struct tty_port *port, int onoff) |
eeb46134 AC |
2500 | { |
2501 | MGSLPC_INFO *info = container_of(port, MGSLPC_INFO, port); | |
2502 | unsigned long flags; | |
d12341f9 | 2503 | |
eeb46134 | 2504 | spin_lock_irqsave(&info->lock,flags); |
fcc8ac18 AC |
2505 | if (onoff) |
2506 | info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; | |
2507 | else | |
2508 | info->serial_signals &= ~SerialSignal_RTS + SerialSignal_DTR; | |
eeb46134 AC |
2509 | set_signals(info); |
2510 | spin_unlock_irqrestore(&info->lock,flags); | |
1da177e4 LT |
2511 | } |
2512 | ||
eeb46134 | 2513 | |
1da177e4 LT |
2514 | static int mgslpc_open(struct tty_struct *tty, struct file * filp) |
2515 | { | |
2516 | MGSLPC_INFO *info; | |
eeb46134 | 2517 | struct tty_port *port; |
1da177e4 LT |
2518 | int retval, line; |
2519 | unsigned long flags; | |
2520 | ||
d12341f9 | 2521 | /* verify range of specified line number */ |
1da177e4 LT |
2522 | line = tty->index; |
2523 | if ((line < 0) || (line >= mgslpc_device_count)) { | |
2524 | printk("%s(%d):mgslpc_open with invalid line #%d.\n", | |
2525 | __FILE__,__LINE__,line); | |
2526 | return -ENODEV; | |
2527 | } | |
2528 | ||
2529 | /* find the info structure for the specified line */ | |
2530 | info = mgslpc_device_list; | |
2531 | while(info && info->line != line) | |
2532 | info = info->next_device; | |
2533 | if (mgslpc_paranoia_check(info, tty->name, "mgslpc_open")) | |
2534 | return -ENODEV; | |
d12341f9 | 2535 | |
eeb46134 | 2536 | port = &info->port; |
1da177e4 | 2537 | tty->driver_data = info; |
eeb46134 | 2538 | tty_port_tty_set(port, tty); |
d12341f9 | 2539 | |
1da177e4 LT |
2540 | if (debug_level >= DEBUG_LEVEL_INFO) |
2541 | printk("%s(%d):mgslpc_open(%s), old ref count = %d\n", | |
eeb46134 | 2542 | __FILE__,__LINE__,tty->driver->name, port->count); |
1da177e4 LT |
2543 | |
2544 | /* If port is closing, signal caller to try again */ | |
eeb46134 AC |
2545 | if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING){ |
2546 | if (port->flags & ASYNC_CLOSING) | |
2547 | interruptible_sleep_on(&port->close_wait); | |
2548 | retval = ((port->flags & ASYNC_HUP_NOTIFY) ? | |
1da177e4 LT |
2549 | -EAGAIN : -ERESTARTSYS); |
2550 | goto cleanup; | |
2551 | } | |
d12341f9 | 2552 | |
eeb46134 | 2553 | tty->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0; |
1da177e4 LT |
2554 | |
2555 | spin_lock_irqsave(&info->netlock, flags); | |
2556 | if (info->netcount) { | |
2557 | retval = -EBUSY; | |
2558 | spin_unlock_irqrestore(&info->netlock, flags); | |
2559 | goto cleanup; | |
2560 | } | |
eeb46134 AC |
2561 | spin_lock(&port->lock); |
2562 | port->count++; | |
2563 | spin_unlock(&port->lock); | |
1da177e4 LT |
2564 | spin_unlock_irqrestore(&info->netlock, flags); |
2565 | ||
eeb46134 | 2566 | if (port->count == 1) { |
1da177e4 | 2567 | /* 1st open on this device, init hardware */ |
eeb46134 | 2568 | retval = startup(info, tty); |
1da177e4 LT |
2569 | if (retval < 0) |
2570 | goto cleanup; | |
2571 | } | |
2572 | ||
eeb46134 | 2573 | retval = tty_port_block_til_ready(&info->port, tty, filp); |
1da177e4 LT |
2574 | if (retval) { |
2575 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2576 | printk("%s(%d):block_til_ready(%s) returned %d\n", | |
2577 | __FILE__,__LINE__, info->device_name, retval); | |
2578 | goto cleanup; | |
2579 | } | |
2580 | ||
2581 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2582 | printk("%s(%d):mgslpc_open(%s) success\n", | |
2583 | __FILE__,__LINE__, info->device_name); | |
2584 | retval = 0; | |
d12341f9 JG |
2585 | |
2586 | cleanup: | |
1da177e4 LT |
2587 | return retval; |
2588 | } | |
2589 | ||
2590 | /* | |
2591 | * /proc fs routines.... | |
2592 | */ | |
2593 | ||
87687144 | 2594 | static inline void line_info(struct seq_file *m, MGSLPC_INFO *info) |
1da177e4 LT |
2595 | { |
2596 | char stat_buf[30]; | |
1da177e4 LT |
2597 | unsigned long flags; |
2598 | ||
87687144 | 2599 | seq_printf(m, "%s:io:%04X irq:%d", |
1da177e4 LT |
2600 | info->device_name, info->io_base, info->irq_level); |
2601 | ||
2602 | /* output current serial signal states */ | |
2603 | spin_lock_irqsave(&info->lock,flags); | |
2604 | get_signals(info); | |
2605 | spin_unlock_irqrestore(&info->lock,flags); | |
d12341f9 | 2606 | |
1da177e4 LT |
2607 | stat_buf[0] = 0; |
2608 | stat_buf[1] = 0; | |
2609 | if (info->serial_signals & SerialSignal_RTS) | |
2610 | strcat(stat_buf, "|RTS"); | |
2611 | if (info->serial_signals & SerialSignal_CTS) | |
2612 | strcat(stat_buf, "|CTS"); | |
2613 | if (info->serial_signals & SerialSignal_DTR) | |
2614 | strcat(stat_buf, "|DTR"); | |
2615 | if (info->serial_signals & SerialSignal_DSR) | |
2616 | strcat(stat_buf, "|DSR"); | |
2617 | if (info->serial_signals & SerialSignal_DCD) | |
2618 | strcat(stat_buf, "|CD"); | |
2619 | if (info->serial_signals & SerialSignal_RI) | |
2620 | strcat(stat_buf, "|RI"); | |
2621 | ||
2622 | if (info->params.mode == MGSL_MODE_HDLC) { | |
87687144 | 2623 | seq_printf(m, " HDLC txok:%d rxok:%d", |
1da177e4 LT |
2624 | info->icount.txok, info->icount.rxok); |
2625 | if (info->icount.txunder) | |
87687144 | 2626 | seq_printf(m, " txunder:%d", info->icount.txunder); |
1da177e4 | 2627 | if (info->icount.txabort) |
87687144 | 2628 | seq_printf(m, " txabort:%d", info->icount.txabort); |
1da177e4 | 2629 | if (info->icount.rxshort) |
87687144 | 2630 | seq_printf(m, " rxshort:%d", info->icount.rxshort); |
1da177e4 | 2631 | if (info->icount.rxlong) |
87687144 | 2632 | seq_printf(m, " rxlong:%d", info->icount.rxlong); |
1da177e4 | 2633 | if (info->icount.rxover) |
87687144 | 2634 | seq_printf(m, " rxover:%d", info->icount.rxover); |
1da177e4 | 2635 | if (info->icount.rxcrc) |
87687144 | 2636 | seq_printf(m, " rxcrc:%d", info->icount.rxcrc); |
1da177e4 | 2637 | } else { |
87687144 | 2638 | seq_printf(m, " ASYNC tx:%d rx:%d", |
1da177e4 LT |
2639 | info->icount.tx, info->icount.rx); |
2640 | if (info->icount.frame) | |
87687144 | 2641 | seq_printf(m, " fe:%d", info->icount.frame); |
1da177e4 | 2642 | if (info->icount.parity) |
87687144 | 2643 | seq_printf(m, " pe:%d", info->icount.parity); |
1da177e4 | 2644 | if (info->icount.brk) |
87687144 | 2645 | seq_printf(m, " brk:%d", info->icount.brk); |
1da177e4 | 2646 | if (info->icount.overrun) |
87687144 | 2647 | seq_printf(m, " oe:%d", info->icount.overrun); |
1da177e4 | 2648 | } |
d12341f9 | 2649 | |
1da177e4 | 2650 | /* Append serial signal status to end */ |
87687144 | 2651 | seq_printf(m, " %s\n", stat_buf+1); |
d12341f9 | 2652 | |
87687144 | 2653 | seq_printf(m, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n", |
1da177e4 LT |
2654 | info->tx_active,info->bh_requested,info->bh_running, |
2655 | info->pending_bh); | |
1da177e4 LT |
2656 | } |
2657 | ||
2658 | /* Called to print information about devices | |
2659 | */ | |
87687144 | 2660 | static int mgslpc_proc_show(struct seq_file *m, void *v) |
1da177e4 | 2661 | { |
1da177e4 | 2662 | MGSLPC_INFO *info; |
d12341f9 | 2663 | |
87687144 | 2664 | seq_printf(m, "synclink driver:%s\n", driver_version); |
d12341f9 | 2665 | |
1da177e4 LT |
2666 | info = mgslpc_device_list; |
2667 | while( info ) { | |
87687144 | 2668 | line_info(m, info); |
1da177e4 LT |
2669 | info = info->next_device; |
2670 | } | |
87687144 AD |
2671 | return 0; |
2672 | } | |
1da177e4 | 2673 | |
87687144 AD |
2674 | static int mgslpc_proc_open(struct inode *inode, struct file *file) |
2675 | { | |
2676 | return single_open(file, mgslpc_proc_show, NULL); | |
1da177e4 LT |
2677 | } |
2678 | ||
87687144 AD |
2679 | static const struct file_operations mgslpc_proc_fops = { |
2680 | .owner = THIS_MODULE, | |
2681 | .open = mgslpc_proc_open, | |
2682 | .read = seq_read, | |
2683 | .llseek = seq_lseek, | |
2684 | .release = single_release, | |
2685 | }; | |
2686 | ||
cdaad343 | 2687 | static int rx_alloc_buffers(MGSLPC_INFO *info) |
1da177e4 LT |
2688 | { |
2689 | /* each buffer has header and data */ | |
2690 | info->rx_buf_size = sizeof(RXBUF) + info->max_frame_size; | |
2691 | ||
2692 | /* calculate total allocation size for 8 buffers */ | |
2693 | info->rx_buf_total_size = info->rx_buf_size * 8; | |
2694 | ||
2695 | /* limit total allocated memory */ | |
2696 | if (info->rx_buf_total_size > 0x10000) | |
2697 | info->rx_buf_total_size = 0x10000; | |
2698 | ||
2699 | /* calculate number of buffers */ | |
2700 | info->rx_buf_count = info->rx_buf_total_size / info->rx_buf_size; | |
2701 | ||
2702 | info->rx_buf = kmalloc(info->rx_buf_total_size, GFP_KERNEL); | |
2703 | if (info->rx_buf == NULL) | |
2704 | return -ENOMEM; | |
2705 | ||
2706 | rx_reset_buffers(info); | |
2707 | return 0; | |
2708 | } | |
2709 | ||
cdaad343 | 2710 | static void rx_free_buffers(MGSLPC_INFO *info) |
1da177e4 | 2711 | { |
735d5661 | 2712 | kfree(info->rx_buf); |
1da177e4 LT |
2713 | info->rx_buf = NULL; |
2714 | } | |
2715 | ||
cdaad343 | 2716 | static int claim_resources(MGSLPC_INFO *info) |
1da177e4 LT |
2717 | { |
2718 | if (rx_alloc_buffers(info) < 0 ) { | |
2719 | printk( "Cant allocate rx buffer %s\n", info->device_name); | |
2720 | release_resources(info); | |
2721 | return -ENODEV; | |
d12341f9 | 2722 | } |
1da177e4 LT |
2723 | return 0; |
2724 | } | |
2725 | ||
cdaad343 | 2726 | static void release_resources(MGSLPC_INFO *info) |
1da177e4 LT |
2727 | { |
2728 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2729 | printk("release_resources(%s)\n", info->device_name); | |
2730 | rx_free_buffers(info); | |
2731 | } | |
2732 | ||
2733 | /* Add the specified device instance data structure to the | |
2734 | * global linked list of devices and increment the device count. | |
d12341f9 | 2735 | * |
1da177e4 LT |
2736 | * Arguments: info pointer to device instance data |
2737 | */ | |
cdaad343 | 2738 | static void mgslpc_add_device(MGSLPC_INFO *info) |
1da177e4 LT |
2739 | { |
2740 | info->next_device = NULL; | |
2741 | info->line = mgslpc_device_count; | |
2742 | sprintf(info->device_name,"ttySLP%d",info->line); | |
d12341f9 | 2743 | |
1da177e4 LT |
2744 | if (info->line < MAX_DEVICE_COUNT) { |
2745 | if (maxframe[info->line]) | |
2746 | info->max_frame_size = maxframe[info->line]; | |
1da177e4 LT |
2747 | } |
2748 | ||
2749 | mgslpc_device_count++; | |
d12341f9 | 2750 | |
1da177e4 LT |
2751 | if (!mgslpc_device_list) |
2752 | mgslpc_device_list = info; | |
d12341f9 | 2753 | else { |
1da177e4 LT |
2754 | MGSLPC_INFO *current_dev = mgslpc_device_list; |
2755 | while( current_dev->next_device ) | |
2756 | current_dev = current_dev->next_device; | |
2757 | current_dev->next_device = info; | |
2758 | } | |
d12341f9 | 2759 | |
1da177e4 LT |
2760 | if (info->max_frame_size < 4096) |
2761 | info->max_frame_size = 4096; | |
2762 | else if (info->max_frame_size > 65535) | |
2763 | info->max_frame_size = 65535; | |
d12341f9 | 2764 | |
1da177e4 LT |
2765 | printk( "SyncLink PC Card %s:IO=%04X IRQ=%d\n", |
2766 | info->device_name, info->io_base, info->irq_level); | |
2767 | ||
af69c7f9 | 2768 | #if SYNCLINK_GENERIC_HDLC |
1da177e4 LT |
2769 | hdlcdev_init(info); |
2770 | #endif | |
2771 | } | |
2772 | ||
cdaad343 | 2773 | static void mgslpc_remove_device(MGSLPC_INFO *remove_info) |
1da177e4 LT |
2774 | { |
2775 | MGSLPC_INFO *info = mgslpc_device_list; | |
2776 | MGSLPC_INFO *last = NULL; | |
2777 | ||
2778 | while(info) { | |
2779 | if (info == remove_info) { | |
2780 | if (last) | |
2781 | last->next_device = info->next_device; | |
2782 | else | |
2783 | mgslpc_device_list = info->next_device; | |
af69c7f9 | 2784 | #if SYNCLINK_GENERIC_HDLC |
1da177e4 LT |
2785 | hdlcdev_exit(info); |
2786 | #endif | |
2787 | release_resources(info); | |
2788 | kfree(info); | |
2789 | mgslpc_device_count--; | |
2790 | return; | |
2791 | } | |
2792 | last = info; | |
2793 | info = info->next_device; | |
2794 | } | |
2795 | } | |
2796 | ||
4af48c8c DB |
2797 | static struct pcmcia_device_id mgslpc_ids[] = { |
2798 | PCMCIA_DEVICE_MANF_CARD(0x02c5, 0x0050), | |
2799 | PCMCIA_DEVICE_NULL | |
2800 | }; | |
2801 | MODULE_DEVICE_TABLE(pcmcia, mgslpc_ids); | |
2802 | ||
1da177e4 LT |
2803 | static struct pcmcia_driver mgslpc_driver = { |
2804 | .owner = THIS_MODULE, | |
2805 | .drv = { | |
2806 | .name = "synclink_cs", | |
2807 | }, | |
15b99ac1 | 2808 | .probe = mgslpc_probe, |
cc3b4866 | 2809 | .remove = mgslpc_detach, |
4af48c8c | 2810 | .id_table = mgslpc_ids, |
98e4c28b DB |
2811 | .suspend = mgslpc_suspend, |
2812 | .resume = mgslpc_resume, | |
1da177e4 LT |
2813 | }; |
2814 | ||
b68e31d0 | 2815 | static const struct tty_operations mgslpc_ops = { |
1da177e4 LT |
2816 | .open = mgslpc_open, |
2817 | .close = mgslpc_close, | |
2818 | .write = mgslpc_write, | |
2819 | .put_char = mgslpc_put_char, | |
2820 | .flush_chars = mgslpc_flush_chars, | |
2821 | .write_room = mgslpc_write_room, | |
2822 | .chars_in_buffer = mgslpc_chars_in_buffer, | |
2823 | .flush_buffer = mgslpc_flush_buffer, | |
2824 | .ioctl = mgslpc_ioctl, | |
2825 | .throttle = mgslpc_throttle, | |
2826 | .unthrottle = mgslpc_unthrottle, | |
2827 | .send_xchar = mgslpc_send_xchar, | |
2828 | .break_ctl = mgslpc_break, | |
2829 | .wait_until_sent = mgslpc_wait_until_sent, | |
1da177e4 LT |
2830 | .set_termios = mgslpc_set_termios, |
2831 | .stop = tx_pause, | |
2832 | .start = tx_release, | |
2833 | .hangup = mgslpc_hangup, | |
2834 | .tiocmget = tiocmget, | |
2835 | .tiocmset = tiocmset, | |
87687144 | 2836 | .proc_fops = &mgslpc_proc_fops, |
1da177e4 LT |
2837 | }; |
2838 | ||
2839 | static void synclink_cs_cleanup(void) | |
2840 | { | |
2841 | int rc; | |
2842 | ||
2843 | printk("Unloading %s: version %s\n", driver_name, driver_version); | |
2844 | ||
2845 | while(mgslpc_device_list) | |
2846 | mgslpc_remove_device(mgslpc_device_list); | |
2847 | ||
2848 | if (serial_driver) { | |
2849 | if ((rc = tty_unregister_driver(serial_driver))) | |
2850 | printk("%s(%d) failed to unregister tty driver err=%d\n", | |
2851 | __FILE__,__LINE__,rc); | |
2852 | put_tty_driver(serial_driver); | |
2853 | } | |
2854 | ||
2855 | pcmcia_unregister_driver(&mgslpc_driver); | |
1da177e4 LT |
2856 | } |
2857 | ||
2858 | static int __init synclink_cs_init(void) | |
2859 | { | |
2860 | int rc; | |
2861 | ||
2862 | if (break_on_load) { | |
2863 | mgslpc_get_text_ptr(); | |
2864 | BREAKPOINT(); | |
2865 | } | |
2866 | ||
2867 | printk("%s %s\n", driver_name, driver_version); | |
2868 | ||
2869 | if ((rc = pcmcia_register_driver(&mgslpc_driver)) < 0) | |
2870 | return rc; | |
2871 | ||
2872 | serial_driver = alloc_tty_driver(MAX_DEVICE_COUNT); | |
2873 | if (!serial_driver) { | |
2874 | rc = -ENOMEM; | |
2875 | goto error; | |
2876 | } | |
2877 | ||
2878 | /* Initialize the tty_driver structure */ | |
d12341f9 | 2879 | |
1da177e4 LT |
2880 | serial_driver->owner = THIS_MODULE; |
2881 | serial_driver->driver_name = "synclink_cs"; | |
2882 | serial_driver->name = "ttySLP"; | |
2883 | serial_driver->major = ttymajor; | |
2884 | serial_driver->minor_start = 64; | |
2885 | serial_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
2886 | serial_driver->subtype = SERIAL_TYPE_NORMAL; | |
2887 | serial_driver->init_termios = tty_std_termios; | |
2888 | serial_driver->init_termios.c_cflag = | |
2889 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
2890 | serial_driver->flags = TTY_DRIVER_REAL_RAW; | |
2891 | tty_set_operations(serial_driver, &mgslpc_ops); | |
2892 | ||
2893 | if ((rc = tty_register_driver(serial_driver)) < 0) { | |
2894 | printk("%s(%d):Couldn't register serial driver\n", | |
2895 | __FILE__,__LINE__); | |
2896 | put_tty_driver(serial_driver); | |
2897 | serial_driver = NULL; | |
2898 | goto error; | |
2899 | } | |
d12341f9 | 2900 | |
1da177e4 LT |
2901 | printk("%s %s, tty major#%d\n", |
2902 | driver_name, driver_version, | |
2903 | serial_driver->major); | |
d12341f9 | 2904 | |
1da177e4 LT |
2905 | return 0; |
2906 | ||
2907 | error: | |
2908 | synclink_cs_cleanup(); | |
2909 | return rc; | |
2910 | } | |
2911 | ||
d12341f9 | 2912 | static void __exit synclink_cs_exit(void) |
1da177e4 LT |
2913 | { |
2914 | synclink_cs_cleanup(); | |
2915 | } | |
2916 | ||
2917 | module_init(synclink_cs_init); | |
2918 | module_exit(synclink_cs_exit); | |
2919 | ||
2920 | static void mgslpc_set_rate(MGSLPC_INFO *info, unsigned char channel, unsigned int rate) | |
2921 | { | |
2922 | unsigned int M, N; | |
2923 | unsigned char val; | |
2924 | ||
d12341f9 JG |
2925 | /* note:standard BRG mode is broken in V3.2 chip |
2926 | * so enhanced mode is always used | |
1da177e4 LT |
2927 | */ |
2928 | ||
2929 | if (rate) { | |
2930 | N = 3686400 / rate; | |
2931 | if (!N) | |
2932 | N = 1; | |
2933 | N >>= 1; | |
2934 | for (M = 1; N > 64 && M < 16; M++) | |
2935 | N >>= 1; | |
2936 | N--; | |
2937 | ||
2938 | /* BGR[5..0] = N | |
2939 | * BGR[9..6] = M | |
2940 | * BGR[7..0] contained in BGR register | |
2941 | * BGR[9..8] contained in CCR2[7..6] | |
2942 | * divisor = (N+1)*2^M | |
2943 | * | |
2944 | * Note: M *must* not be zero (causes asymetric duty cycle) | |
d12341f9 | 2945 | */ |
1da177e4 LT |
2946 | write_reg(info, (unsigned char) (channel + BGR), |
2947 | (unsigned char) ((M << 6) + N)); | |
2948 | val = read_reg(info, (unsigned char) (channel + CCR2)) & 0x3f; | |
2949 | val |= ((M << 4) & 0xc0); | |
2950 | write_reg(info, (unsigned char) (channel + CCR2), val); | |
2951 | } | |
2952 | } | |
2953 | ||
2954 | /* Enabled the AUX clock output at the specified frequency. | |
2955 | */ | |
2956 | static void enable_auxclk(MGSLPC_INFO *info) | |
2957 | { | |
2958 | unsigned char val; | |
d12341f9 | 2959 | |
1da177e4 LT |
2960 | /* MODE |
2961 | * | |
2962 | * 07..06 MDS[1..0] 10 = transparent HDLC mode | |
2963 | * 05 ADM Address Mode, 0 = no addr recognition | |
2964 | * 04 TMD Timer Mode, 0 = external | |
2965 | * 03 RAC Receiver Active, 0 = inactive | |
2966 | * 02 RTS 0=RTS active during xmit, 1=RTS always active | |
2967 | * 01 TRS Timer Resolution, 1=512 | |
2968 | * 00 TLP Test Loop, 0 = no loop | |
2969 | * | |
2970 | * 1000 0010 | |
d12341f9 | 2971 | */ |
1da177e4 | 2972 | val = 0x82; |
d12341f9 JG |
2973 | |
2974 | /* channel B RTS is used to enable AUXCLK driver on SP505 */ | |
1da177e4 LT |
2975 | if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed) |
2976 | val |= BIT2; | |
2977 | write_reg(info, CHB + MODE, val); | |
d12341f9 | 2978 | |
1da177e4 LT |
2979 | /* CCR0 |
2980 | * | |
2981 | * 07 PU Power Up, 1=active, 0=power down | |
2982 | * 06 MCE Master Clock Enable, 1=enabled | |
2983 | * 05 Reserved, 0 | |
2984 | * 04..02 SC[2..0] Encoding | |
2985 | * 01..00 SM[1..0] Serial Mode, 00=HDLC | |
2986 | * | |
2987 | * 11000000 | |
d12341f9 | 2988 | */ |
1da177e4 | 2989 | write_reg(info, CHB + CCR0, 0xc0); |
d12341f9 | 2990 | |
1da177e4 LT |
2991 | /* CCR1 |
2992 | * | |
2993 | * 07 SFLG Shared Flag, 0 = disable shared flags | |
2994 | * 06 GALP Go Active On Loop, 0 = not used | |
2995 | * 05 GLP Go On Loop, 0 = not used | |
2996 | * 04 ODS Output Driver Select, 1=TxD is push-pull output | |
2997 | * 03 ITF Interframe Time Fill, 0=mark, 1=flag | |
2998 | * 02..00 CM[2..0] Clock Mode | |
2999 | * | |
3000 | * 0001 0111 | |
d12341f9 | 3001 | */ |
1da177e4 | 3002 | write_reg(info, CHB + CCR1, 0x17); |
d12341f9 | 3003 | |
1da177e4 LT |
3004 | /* CCR2 (Channel B) |
3005 | * | |
3006 | * 07..06 BGR[9..8] Baud rate bits 9..8 | |
3007 | * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value | |
3008 | * 04 SSEL Clock source select, 1=submode b | |
3009 | * 03 TOE 0=TxCLK is input, 1=TxCLK is output | |
3010 | * 02 RWX Read/Write Exchange 0=disabled | |
3011 | * 01 C32, CRC select, 0=CRC-16, 1=CRC-32 | |
3012 | * 00 DIV, data inversion 0=disabled, 1=enabled | |
3013 | * | |
3014 | * 0011 1000 | |
d12341f9 | 3015 | */ |
1da177e4 LT |
3016 | if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed) |
3017 | write_reg(info, CHB + CCR2, 0x38); | |
3018 | else | |
3019 | write_reg(info, CHB + CCR2, 0x30); | |
d12341f9 | 3020 | |
1da177e4 LT |
3021 | /* CCR4 |
3022 | * | |
3023 | * 07 MCK4 Master Clock Divide by 4, 1=enabled | |
3024 | * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled | |
3025 | * 05 TST1 Test Pin, 0=normal operation | |
3026 | * 04 ICD Ivert Carrier Detect, 1=enabled (active low) | |
3027 | * 03..02 Reserved, must be 0 | |
3028 | * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes | |
3029 | * | |
3030 | * 0101 0000 | |
d12341f9 | 3031 | */ |
1da177e4 | 3032 | write_reg(info, CHB + CCR4, 0x50); |
d12341f9 | 3033 | |
1da177e4 LT |
3034 | /* if auxclk not enabled, set internal BRG so |
3035 | * CTS transitions can be detected (requires TxC) | |
d12341f9 | 3036 | */ |
1da177e4 LT |
3037 | if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed) |
3038 | mgslpc_set_rate(info, CHB, info->params.clock_speed); | |
3039 | else | |
3040 | mgslpc_set_rate(info, CHB, 921600); | |
3041 | } | |
3042 | ||
d12341f9 | 3043 | static void loopback_enable(MGSLPC_INFO *info) |
1da177e4 LT |
3044 | { |
3045 | unsigned char val; | |
d12341f9 JG |
3046 | |
3047 | /* CCR1:02..00 CM[2..0] Clock Mode = 111 (clock mode 7) */ | |
1da177e4 LT |
3048 | val = read_reg(info, CHA + CCR1) | (BIT2 + BIT1 + BIT0); |
3049 | write_reg(info, CHA + CCR1, val); | |
d12341f9 JG |
3050 | |
3051 | /* CCR2:04 SSEL Clock source select, 1=submode b */ | |
1da177e4 LT |
3052 | val = read_reg(info, CHA + CCR2) | (BIT4 + BIT5); |
3053 | write_reg(info, CHA + CCR2, val); | |
d12341f9 JG |
3054 | |
3055 | /* set LinkSpeed if available, otherwise default to 2Mbps */ | |
1da177e4 LT |
3056 | if (info->params.clock_speed) |
3057 | mgslpc_set_rate(info, CHA, info->params.clock_speed); | |
3058 | else | |
3059 | mgslpc_set_rate(info, CHA, 1843200); | |
d12341f9 JG |
3060 | |
3061 | /* MODE:00 TLP Test Loop, 1=loopback enabled */ | |
1da177e4 LT |
3062 | val = read_reg(info, CHA + MODE) | BIT0; |
3063 | write_reg(info, CHA + MODE, val); | |
3064 | } | |
3065 | ||
cdaad343 | 3066 | static void hdlc_mode(MGSLPC_INFO *info) |
1da177e4 LT |
3067 | { |
3068 | unsigned char val; | |
3069 | unsigned char clkmode, clksubmode; | |
3070 | ||
d12341f9 | 3071 | /* disable all interrupts */ |
1da177e4 LT |
3072 | irq_disable(info, CHA, 0xffff); |
3073 | irq_disable(info, CHB, 0xffff); | |
3074 | port_irq_disable(info, 0xff); | |
d12341f9 JG |
3075 | |
3076 | /* assume clock mode 0a, rcv=RxC xmt=TxC */ | |
1da177e4 LT |
3077 | clkmode = clksubmode = 0; |
3078 | if (info->params.flags & HDLC_FLAG_RXC_DPLL | |
3079 | && info->params.flags & HDLC_FLAG_TXC_DPLL) { | |
d12341f9 | 3080 | /* clock mode 7a, rcv = DPLL, xmt = DPLL */ |
1da177e4 LT |
3081 | clkmode = 7; |
3082 | } else if (info->params.flags & HDLC_FLAG_RXC_BRG | |
3083 | && info->params.flags & HDLC_FLAG_TXC_BRG) { | |
d12341f9 | 3084 | /* clock mode 7b, rcv = BRG, xmt = BRG */ |
1da177e4 LT |
3085 | clkmode = 7; |
3086 | clksubmode = 1; | |
3087 | } else if (info->params.flags & HDLC_FLAG_RXC_DPLL) { | |
3088 | if (info->params.flags & HDLC_FLAG_TXC_BRG) { | |
d12341f9 | 3089 | /* clock mode 6b, rcv = DPLL, xmt = BRG/16 */ |
1da177e4 LT |
3090 | clkmode = 6; |
3091 | clksubmode = 1; | |
3092 | } else { | |
d12341f9 | 3093 | /* clock mode 6a, rcv = DPLL, xmt = TxC */ |
1da177e4 LT |
3094 | clkmode = 6; |
3095 | } | |
3096 | } else if (info->params.flags & HDLC_FLAG_TXC_BRG) { | |
d12341f9 | 3097 | /* clock mode 0b, rcv = RxC, xmt = BRG */ |
1da177e4 LT |
3098 | clksubmode = 1; |
3099 | } | |
d12341f9 | 3100 | |
1da177e4 LT |
3101 | /* MODE |
3102 | * | |
3103 | * 07..06 MDS[1..0] 10 = transparent HDLC mode | |
3104 | * 05 ADM Address Mode, 0 = no addr recognition | |
3105 | * 04 TMD Timer Mode, 0 = external | |
3106 | * 03 RAC Receiver Active, 0 = inactive | |
3107 | * 02 RTS 0=RTS active during xmit, 1=RTS always active | |
3108 | * 01 TRS Timer Resolution, 1=512 | |
3109 | * 00 TLP Test Loop, 0 = no loop | |
3110 | * | |
3111 | * 1000 0010 | |
d12341f9 | 3112 | */ |
1da177e4 LT |
3113 | val = 0x82; |
3114 | if (info->params.loopback) | |
3115 | val |= BIT0; | |
d12341f9 JG |
3116 | |
3117 | /* preserve RTS state */ | |
1da177e4 LT |
3118 | if (info->serial_signals & SerialSignal_RTS) |
3119 | val |= BIT2; | |
3120 | write_reg(info, CHA + MODE, val); | |
d12341f9 | 3121 | |
1da177e4 LT |
3122 | /* CCR0 |
3123 | * | |
3124 | * 07 PU Power Up, 1=active, 0=power down | |
3125 | * 06 MCE Master Clock Enable, 1=enabled | |
3126 | * 05 Reserved, 0 | |
3127 | * 04..02 SC[2..0] Encoding | |
3128 | * 01..00 SM[1..0] Serial Mode, 00=HDLC | |
3129 | * | |
3130 | * 11000000 | |
d12341f9 | 3131 | */ |
1da177e4 LT |
3132 | val = 0xc0; |
3133 | switch (info->params.encoding) | |
3134 | { | |
3135 | case HDLC_ENCODING_NRZI: | |
3136 | val |= BIT3; | |
3137 | break; | |
3138 | case HDLC_ENCODING_BIPHASE_SPACE: | |
3139 | val |= BIT4; | |
3140 | break; // FM0 | |
3141 | case HDLC_ENCODING_BIPHASE_MARK: | |
3142 | val |= BIT4 + BIT2; | |
3143 | break; // FM1 | |
3144 | case HDLC_ENCODING_BIPHASE_LEVEL: | |
3145 | val |= BIT4 + BIT3; | |
3146 | break; // Manchester | |
3147 | } | |
3148 | write_reg(info, CHA + CCR0, val); | |
d12341f9 | 3149 | |
1da177e4 LT |
3150 | /* CCR1 |
3151 | * | |
3152 | * 07 SFLG Shared Flag, 0 = disable shared flags | |
3153 | * 06 GALP Go Active On Loop, 0 = not used | |
3154 | * 05 GLP Go On Loop, 0 = not used | |
3155 | * 04 ODS Output Driver Select, 1=TxD is push-pull output | |
3156 | * 03 ITF Interframe Time Fill, 0=mark, 1=flag | |
3157 | * 02..00 CM[2..0] Clock Mode | |
3158 | * | |
3159 | * 0001 0000 | |
d12341f9 | 3160 | */ |
1da177e4 LT |
3161 | val = 0x10 + clkmode; |
3162 | write_reg(info, CHA + CCR1, val); | |
d12341f9 | 3163 | |
1da177e4 LT |
3164 | /* CCR2 |
3165 | * | |
3166 | * 07..06 BGR[9..8] Baud rate bits 9..8 | |
3167 | * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value | |
3168 | * 04 SSEL Clock source select, 1=submode b | |
3169 | * 03 TOE 0=TxCLK is input, 0=TxCLK is input | |
3170 | * 02 RWX Read/Write Exchange 0=disabled | |
3171 | * 01 C32, CRC select, 0=CRC-16, 1=CRC-32 | |
3172 | * 00 DIV, data inversion 0=disabled, 1=enabled | |
3173 | * | |
3174 | * 0000 0000 | |
d12341f9 | 3175 | */ |
1da177e4 LT |
3176 | val = 0x00; |
3177 | if (clkmode == 2 || clkmode == 3 || clkmode == 6 | |
3178 | || clkmode == 7 || (clkmode == 0 && clksubmode == 1)) | |
3179 | val |= BIT5; | |
3180 | if (clksubmode) | |
3181 | val |= BIT4; | |
3182 | if (info->params.crc_type == HDLC_CRC_32_CCITT) | |
3183 | val |= BIT1; | |
3184 | if (info->params.encoding == HDLC_ENCODING_NRZB) | |
3185 | val |= BIT0; | |
3186 | write_reg(info, CHA + CCR2, val); | |
d12341f9 | 3187 | |
1da177e4 LT |
3188 | /* CCR3 |
3189 | * | |
3190 | * 07..06 PRE[1..0] Preamble count 00=1, 01=2, 10=4, 11=8 | |
3191 | * 05 EPT Enable preamble transmission, 1=enabled | |
3192 | * 04 RADD Receive address pushed to FIFO, 0=disabled | |
3193 | * 03 CRL CRC Reset Level, 0=FFFF | |
3194 | * 02 RCRC Rx CRC 0=On 1=Off | |
3195 | * 01 TCRC Tx CRC 0=On 1=Off | |
3196 | * 00 PSD DPLL Phase Shift Disable | |
3197 | * | |
3198 | * 0000 0000 | |
d12341f9 | 3199 | */ |
1da177e4 LT |
3200 | val = 0x00; |
3201 | if (info->params.crc_type == HDLC_CRC_NONE) | |
3202 | val |= BIT2 + BIT1; | |
3203 | if (info->params.preamble != HDLC_PREAMBLE_PATTERN_NONE) | |
3204 | val |= BIT5; | |
3205 | switch (info->params.preamble_length) | |
3206 | { | |
3207 | case HDLC_PREAMBLE_LENGTH_16BITS: | |
3208 | val |= BIT6; | |
3209 | break; | |
3210 | case HDLC_PREAMBLE_LENGTH_32BITS: | |
3211 | val |= BIT6; | |
3212 | break; | |
3213 | case HDLC_PREAMBLE_LENGTH_64BITS: | |
3214 | val |= BIT7 + BIT6; | |
3215 | break; | |
3216 | } | |
3217 | write_reg(info, CHA + CCR3, val); | |
d12341f9 JG |
3218 | |
3219 | /* PRE - Preamble pattern */ | |
1da177e4 LT |
3220 | val = 0; |
3221 | switch (info->params.preamble) | |
3222 | { | |
3223 | case HDLC_PREAMBLE_PATTERN_FLAGS: val = 0x7e; break; | |
3224 | case HDLC_PREAMBLE_PATTERN_10: val = 0xaa; break; | |
3225 | case HDLC_PREAMBLE_PATTERN_01: val = 0x55; break; | |
3226 | case HDLC_PREAMBLE_PATTERN_ONES: val = 0xff; break; | |
3227 | } | |
3228 | write_reg(info, CHA + PRE, val); | |
d12341f9 | 3229 | |
1da177e4 LT |
3230 | /* CCR4 |
3231 | * | |
3232 | * 07 MCK4 Master Clock Divide by 4, 1=enabled | |
3233 | * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled | |
3234 | * 05 TST1 Test Pin, 0=normal operation | |
3235 | * 04 ICD Ivert Carrier Detect, 1=enabled (active low) | |
3236 | * 03..02 Reserved, must be 0 | |
3237 | * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes | |
3238 | * | |
3239 | * 0101 0000 | |
d12341f9 | 3240 | */ |
1da177e4 LT |
3241 | val = 0x50; |
3242 | write_reg(info, CHA + CCR4, val); | |
3243 | if (info->params.flags & HDLC_FLAG_RXC_DPLL) | |
3244 | mgslpc_set_rate(info, CHA, info->params.clock_speed * 16); | |
3245 | else | |
3246 | mgslpc_set_rate(info, CHA, info->params.clock_speed); | |
d12341f9 | 3247 | |
1da177e4 LT |
3248 | /* RLCR Receive length check register |
3249 | * | |
3250 | * 7 1=enable receive length check | |
3251 | * 6..0 Max frame length = (RL + 1) * 32 | |
d12341f9 | 3252 | */ |
1da177e4 | 3253 | write_reg(info, CHA + RLCR, 0); |
d12341f9 | 3254 | |
1da177e4 LT |
3255 | /* XBCH Transmit Byte Count High |
3256 | * | |
3257 | * 07 DMA mode, 0 = interrupt driven | |
3258 | * 06 NRM, 0=ABM (ignored) | |
3259 | * 05 CAS Carrier Auto Start | |
3260 | * 04 XC Transmit Continuously (ignored) | |
3261 | * 03..00 XBC[10..8] Transmit byte count bits 10..8 | |
3262 | * | |
3263 | * 0000 0000 | |
d12341f9 | 3264 | */ |
1da177e4 LT |
3265 | val = 0x00; |
3266 | if (info->params.flags & HDLC_FLAG_AUTO_DCD) | |
3267 | val |= BIT5; | |
3268 | write_reg(info, CHA + XBCH, val); | |
3269 | enable_auxclk(info); | |
3270 | if (info->params.loopback || info->testing_irq) | |
3271 | loopback_enable(info); | |
3272 | if (info->params.flags & HDLC_FLAG_AUTO_CTS) | |
3273 | { | |
3274 | irq_enable(info, CHB, IRQ_CTS); | |
d12341f9 | 3275 | /* PVR[3] 1=AUTO CTS active */ |
1da177e4 LT |
3276 | set_reg_bits(info, CHA + PVR, BIT3); |
3277 | } else | |
3278 | clear_reg_bits(info, CHA + PVR, BIT3); | |
3279 | ||
3280 | irq_enable(info, CHA, | |
3281 | IRQ_RXEOM + IRQ_RXFIFO + IRQ_ALLSENT + | |
3282 | IRQ_UNDERRUN + IRQ_TXFIFO); | |
3283 | issue_command(info, CHA, CMD_TXRESET + CMD_RXRESET); | |
3284 | wait_command_complete(info, CHA); | |
3285 | read_reg16(info, CHA + ISR); /* clear pending IRQs */ | |
d12341f9 | 3286 | |
1da177e4 LT |
3287 | /* Master clock mode enabled above to allow reset commands |
3288 | * to complete even if no data clocks are present. | |
3289 | * | |
3290 | * Disable master clock mode for normal communications because | |
3291 | * V3.2 of the ESCC2 has a bug that prevents the transmit all sent | |
3292 | * IRQ when in master clock mode. | |
3293 | * | |
3294 | * Leave master clock mode enabled for IRQ test because the | |
3295 | * timer IRQ used by the test can only happen in master clock mode. | |
d12341f9 | 3296 | */ |
1da177e4 LT |
3297 | if (!info->testing_irq) |
3298 | clear_reg_bits(info, CHA + CCR0, BIT6); | |
3299 | ||
3300 | tx_set_idle(info); | |
3301 | ||
3302 | tx_stop(info); | |
3303 | rx_stop(info); | |
3304 | } | |
3305 | ||
cdaad343 | 3306 | static void rx_stop(MGSLPC_INFO *info) |
1da177e4 LT |
3307 | { |
3308 | if (debug_level >= DEBUG_LEVEL_ISR) | |
3309 | printk("%s(%d):rx_stop(%s)\n", | |
3310 | __FILE__,__LINE__, info->device_name ); | |
d12341f9 JG |
3311 | |
3312 | /* MODE:03 RAC Receiver Active, 0=inactive */ | |
1da177e4 LT |
3313 | clear_reg_bits(info, CHA + MODE, BIT3); |
3314 | ||
0fab6de0 JP |
3315 | info->rx_enabled = false; |
3316 | info->rx_overflow = false; | |
1da177e4 LT |
3317 | } |
3318 | ||
cdaad343 | 3319 | static void rx_start(MGSLPC_INFO *info) |
1da177e4 LT |
3320 | { |
3321 | if (debug_level >= DEBUG_LEVEL_ISR) | |
3322 | printk("%s(%d):rx_start(%s)\n", | |
3323 | __FILE__,__LINE__, info->device_name ); | |
3324 | ||
3325 | rx_reset_buffers(info); | |
0fab6de0 JP |
3326 | info->rx_enabled = false; |
3327 | info->rx_overflow = false; | |
1da177e4 | 3328 | |
d12341f9 | 3329 | /* MODE:03 RAC Receiver Active, 1=active */ |
1da177e4 LT |
3330 | set_reg_bits(info, CHA + MODE, BIT3); |
3331 | ||
0fab6de0 | 3332 | info->rx_enabled = true; |
1da177e4 LT |
3333 | } |
3334 | ||
eeb46134 | 3335 | static void tx_start(MGSLPC_INFO *info, struct tty_struct *tty) |
1da177e4 LT |
3336 | { |
3337 | if (debug_level >= DEBUG_LEVEL_ISR) | |
3338 | printk("%s(%d):tx_start(%s)\n", | |
3339 | __FILE__,__LINE__, info->device_name ); | |
d12341f9 | 3340 | |
1da177e4 LT |
3341 | if (info->tx_count) { |
3342 | /* If auto RTS enabled and RTS is inactive, then assert */ | |
3343 | /* RTS and set a flag indicating that the driver should */ | |
3344 | /* negate RTS when the transmission completes. */ | |
0fab6de0 | 3345 | info->drop_rts_on_tx_done = false; |
1da177e4 LT |
3346 | |
3347 | if (info->params.flags & HDLC_FLAG_AUTO_RTS) { | |
3348 | get_signals(info); | |
3349 | if (!(info->serial_signals & SerialSignal_RTS)) { | |
3350 | info->serial_signals |= SerialSignal_RTS; | |
3351 | set_signals(info); | |
0fab6de0 | 3352 | info->drop_rts_on_tx_done = true; |
1da177e4 LT |
3353 | } |
3354 | } | |
3355 | ||
3356 | if (info->params.mode == MGSL_MODE_ASYNC) { | |
3357 | if (!info->tx_active) { | |
0fab6de0 | 3358 | info->tx_active = true; |
eeb46134 | 3359 | tx_ready(info, tty); |
1da177e4 LT |
3360 | } |
3361 | } else { | |
0fab6de0 | 3362 | info->tx_active = true; |
eeb46134 | 3363 | tx_ready(info, tty); |
40565f19 JS |
3364 | mod_timer(&info->tx_timer, jiffies + |
3365 | msecs_to_jiffies(5000)); | |
1da177e4 LT |
3366 | } |
3367 | } | |
3368 | ||
3369 | if (!info->tx_enabled) | |
0fab6de0 | 3370 | info->tx_enabled = true; |
1da177e4 LT |
3371 | } |
3372 | ||
cdaad343 | 3373 | static void tx_stop(MGSLPC_INFO *info) |
1da177e4 LT |
3374 | { |
3375 | if (debug_level >= DEBUG_LEVEL_ISR) | |
3376 | printk("%s(%d):tx_stop(%s)\n", | |
3377 | __FILE__,__LINE__, info->device_name ); | |
d12341f9 JG |
3378 | |
3379 | del_timer(&info->tx_timer); | |
1da177e4 | 3380 | |
0fab6de0 JP |
3381 | info->tx_enabled = false; |
3382 | info->tx_active = false; | |
1da177e4 LT |
3383 | } |
3384 | ||
3385 | /* Reset the adapter to a known state and prepare it for further use. | |
3386 | */ | |
cdaad343 | 3387 | static void reset_device(MGSLPC_INFO *info) |
1da177e4 | 3388 | { |
d12341f9 | 3389 | /* power up both channels (set BIT7) */ |
1da177e4 LT |
3390 | write_reg(info, CHA + CCR0, 0x80); |
3391 | write_reg(info, CHB + CCR0, 0x80); | |
3392 | write_reg(info, CHA + MODE, 0); | |
3393 | write_reg(info, CHB + MODE, 0); | |
d12341f9 JG |
3394 | |
3395 | /* disable all interrupts */ | |
1da177e4 LT |
3396 | irq_disable(info, CHA, 0xffff); |
3397 | irq_disable(info, CHB, 0xffff); | |
3398 | port_irq_disable(info, 0xff); | |
d12341f9 | 3399 | |
1da177e4 LT |
3400 | /* PCR Port Configuration Register |
3401 | * | |
3402 | * 07..04 DEC[3..0] Serial I/F select outputs | |
3403 | * 03 output, 1=AUTO CTS control enabled | |
3404 | * 02 RI Ring Indicator input 0=active | |
3405 | * 01 DSR input 0=active | |
3406 | * 00 DTR output 0=active | |
3407 | * | |
3408 | * 0000 0110 | |
d12341f9 | 3409 | */ |
1da177e4 | 3410 | write_reg(info, PCR, 0x06); |
d12341f9 | 3411 | |
1da177e4 LT |
3412 | /* PVR Port Value Register |
3413 | * | |
3414 | * 07..04 DEC[3..0] Serial I/F select (0000=disabled) | |
3415 | * 03 AUTO CTS output 1=enabled | |
3416 | * 02 RI Ring Indicator input | |
3417 | * 01 DSR input | |
3418 | * 00 DTR output (1=inactive) | |
3419 | * | |
3420 | * 0000 0001 | |
3421 | */ | |
3422 | // write_reg(info, PVR, PVR_DTR); | |
d12341f9 | 3423 | |
1da177e4 LT |
3424 | /* IPC Interrupt Port Configuration |
3425 | * | |
3426 | * 07 VIS 1=Masked interrupts visible | |
3427 | * 06..05 Reserved, 0 | |
3428 | * 04..03 SLA Slave address, 00 ignored | |
3429 | * 02 CASM Cascading Mode, 1=daisy chain | |
3430 | * 01..00 IC[1..0] Interrupt Config, 01=push-pull output, active low | |
3431 | * | |
3432 | * 0000 0101 | |
d12341f9 | 3433 | */ |
1da177e4 LT |
3434 | write_reg(info, IPC, 0x05); |
3435 | } | |
3436 | ||
cdaad343 | 3437 | static void async_mode(MGSLPC_INFO *info) |
1da177e4 LT |
3438 | { |
3439 | unsigned char val; | |
3440 | ||
d12341f9 | 3441 | /* disable all interrupts */ |
1da177e4 LT |
3442 | irq_disable(info, CHA, 0xffff); |
3443 | irq_disable(info, CHB, 0xffff); | |
3444 | port_irq_disable(info, 0xff); | |
d12341f9 | 3445 | |
1da177e4 LT |
3446 | /* MODE |
3447 | * | |
3448 | * 07 Reserved, 0 | |
3449 | * 06 FRTS RTS State, 0=active | |
3450 | * 05 FCTS Flow Control on CTS | |
3451 | * 04 FLON Flow Control Enable | |
3452 | * 03 RAC Receiver Active, 0 = inactive | |
3453 | * 02 RTS 0=Auto RTS, 1=manual RTS | |
3454 | * 01 TRS Timer Resolution, 1=512 | |
3455 | * 00 TLP Test Loop, 0 = no loop | |
3456 | * | |
3457 | * 0000 0110 | |
d12341f9 | 3458 | */ |
1da177e4 LT |
3459 | val = 0x06; |
3460 | if (info->params.loopback) | |
3461 | val |= BIT0; | |
d12341f9 JG |
3462 | |
3463 | /* preserve RTS state */ | |
1da177e4 LT |
3464 | if (!(info->serial_signals & SerialSignal_RTS)) |
3465 | val |= BIT6; | |
3466 | write_reg(info, CHA + MODE, val); | |
d12341f9 | 3467 | |
1da177e4 LT |
3468 | /* CCR0 |
3469 | * | |
3470 | * 07 PU Power Up, 1=active, 0=power down | |
3471 | * 06 MCE Master Clock Enable, 1=enabled | |
3472 | * 05 Reserved, 0 | |
3473 | * 04..02 SC[2..0] Encoding, 000=NRZ | |
3474 | * 01..00 SM[1..0] Serial Mode, 11=Async | |
3475 | * | |
3476 | * 1000 0011 | |
d12341f9 | 3477 | */ |
1da177e4 | 3478 | write_reg(info, CHA + CCR0, 0x83); |
d12341f9 | 3479 | |
1da177e4 LT |
3480 | /* CCR1 |
3481 | * | |
3482 | * 07..05 Reserved, 0 | |
3483 | * 04 ODS Output Driver Select, 1=TxD is push-pull output | |
3484 | * 03 BCR Bit Clock Rate, 1=16x | |
3485 | * 02..00 CM[2..0] Clock Mode, 111=BRG | |
3486 | * | |
3487 | * 0001 1111 | |
d12341f9 | 3488 | */ |
1da177e4 | 3489 | write_reg(info, CHA + CCR1, 0x1f); |
d12341f9 | 3490 | |
1da177e4 LT |
3491 | /* CCR2 (channel A) |
3492 | * | |
3493 | * 07..06 BGR[9..8] Baud rate bits 9..8 | |
3494 | * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value | |
3495 | * 04 SSEL Clock source select, 1=submode b | |
3496 | * 03 TOE 0=TxCLK is input, 0=TxCLK is input | |
3497 | * 02 RWX Read/Write Exchange 0=disabled | |
3498 | * 01 Reserved, 0 | |
3499 | * 00 DIV, data inversion 0=disabled, 1=enabled | |
3500 | * | |
3501 | * 0001 0000 | |
d12341f9 | 3502 | */ |
1da177e4 | 3503 | write_reg(info, CHA + CCR2, 0x10); |
d12341f9 | 3504 | |
1da177e4 LT |
3505 | /* CCR3 |
3506 | * | |
3507 | * 07..01 Reserved, 0 | |
3508 | * 00 PSD DPLL Phase Shift Disable | |
3509 | * | |
3510 | * 0000 0000 | |
d12341f9 | 3511 | */ |
1da177e4 | 3512 | write_reg(info, CHA + CCR3, 0); |
d12341f9 | 3513 | |
1da177e4 LT |
3514 | /* CCR4 |
3515 | * | |
3516 | * 07 MCK4 Master Clock Divide by 4, 1=enabled | |
3517 | * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled | |
3518 | * 05 TST1 Test Pin, 0=normal operation | |
3519 | * 04 ICD Ivert Carrier Detect, 1=enabled (active low) | |
3520 | * 03..00 Reserved, must be 0 | |
3521 | * | |
3522 | * 0101 0000 | |
d12341f9 | 3523 | */ |
1da177e4 LT |
3524 | write_reg(info, CHA + CCR4, 0x50); |
3525 | mgslpc_set_rate(info, CHA, info->params.data_rate * 16); | |
d12341f9 | 3526 | |
1da177e4 LT |
3527 | /* DAFO Data Format |
3528 | * | |
3529 | * 07 Reserved, 0 | |
3530 | * 06 XBRK transmit break, 0=normal operation | |
3531 | * 05 Stop bits (0=1, 1=2) | |
3532 | * 04..03 PAR[1..0] Parity (01=odd, 10=even) | |
3533 | * 02 PAREN Parity Enable | |
3534 | * 01..00 CHL[1..0] Character Length (00=8, 01=7) | |
3535 | * | |
d12341f9 | 3536 | */ |
1da177e4 LT |
3537 | val = 0x00; |
3538 | if (info->params.data_bits != 8) | |
3539 | val |= BIT0; /* 7 bits */ | |
3540 | if (info->params.stop_bits != 1) | |
3541 | val |= BIT5; | |
3542 | if (info->params.parity != ASYNC_PARITY_NONE) | |
3543 | { | |
3544 | val |= BIT2; /* Parity enable */ | |
3545 | if (info->params.parity == ASYNC_PARITY_ODD) | |
3546 | val |= BIT3; | |
3547 | else | |
3548 | val |= BIT4; | |
3549 | } | |
3550 | write_reg(info, CHA + DAFO, val); | |
d12341f9 | 3551 | |
1da177e4 LT |
3552 | /* RFC Rx FIFO Control |
3553 | * | |
3554 | * 07 Reserved, 0 | |
3555 | * 06 DPS, 1=parity bit not stored in data byte | |
3556 | * 05 DXS, 0=all data stored in FIFO (including XON/XOFF) | |
3557 | * 04 RFDF Rx FIFO Data Format, 1=status byte stored in FIFO | |
3558 | * 03..02 RFTH[1..0], rx threshold, 11=16 status + 16 data byte | |
3559 | * 01 Reserved, 0 | |
3560 | * 00 TCDE Terminate Char Detect Enable, 0=disabled | |
3561 | * | |
3562 | * 0101 1100 | |
d12341f9 | 3563 | */ |
1da177e4 | 3564 | write_reg(info, CHA + RFC, 0x5c); |
d12341f9 | 3565 | |
1da177e4 LT |
3566 | /* RLCR Receive length check register |
3567 | * | |
3568 | * Max frame length = (RL + 1) * 32 | |
d12341f9 | 3569 | */ |
1da177e4 | 3570 | write_reg(info, CHA + RLCR, 0); |
d12341f9 | 3571 | |
1da177e4 LT |
3572 | /* XBCH Transmit Byte Count High |
3573 | * | |
3574 | * 07 DMA mode, 0 = interrupt driven | |
3575 | * 06 NRM, 0=ABM (ignored) | |
3576 | * 05 CAS Carrier Auto Start | |
3577 | * 04 XC Transmit Continuously (ignored) | |
3578 | * 03..00 XBC[10..8] Transmit byte count bits 10..8 | |
3579 | * | |
3580 | * 0000 0000 | |
d12341f9 | 3581 | */ |
1da177e4 LT |
3582 | val = 0x00; |
3583 | if (info->params.flags & HDLC_FLAG_AUTO_DCD) | |
3584 | val |= BIT5; | |
3585 | write_reg(info, CHA + XBCH, val); | |
3586 | if (info->params.flags & HDLC_FLAG_AUTO_CTS) | |
3587 | irq_enable(info, CHA, IRQ_CTS); | |
d12341f9 JG |
3588 | |
3589 | /* MODE:03 RAC Receiver Active, 1=active */ | |
1da177e4 LT |
3590 | set_reg_bits(info, CHA + MODE, BIT3); |
3591 | enable_auxclk(info); | |
3592 | if (info->params.flags & HDLC_FLAG_AUTO_CTS) { | |
3593 | irq_enable(info, CHB, IRQ_CTS); | |
d12341f9 | 3594 | /* PVR[3] 1=AUTO CTS active */ |
1da177e4 LT |
3595 | set_reg_bits(info, CHA + PVR, BIT3); |
3596 | } else | |
3597 | clear_reg_bits(info, CHA + PVR, BIT3); | |
3598 | irq_enable(info, CHA, | |
3599 | IRQ_RXEOM + IRQ_RXFIFO + IRQ_BREAK_ON + IRQ_RXTIME + | |
3600 | IRQ_ALLSENT + IRQ_TXFIFO); | |
3601 | issue_command(info, CHA, CMD_TXRESET + CMD_RXRESET); | |
3602 | wait_command_complete(info, CHA); | |
3603 | read_reg16(info, CHA + ISR); /* clear pending IRQs */ | |
3604 | } | |
3605 | ||
3606 | /* Set the HDLC idle mode for the transmitter. | |
3607 | */ | |
cdaad343 | 3608 | static void tx_set_idle(MGSLPC_INFO *info) |
1da177e4 | 3609 | { |
d12341f9 | 3610 | /* Note: ESCC2 only supports flags and one idle modes */ |
1da177e4 LT |
3611 | if (info->idle_mode == HDLC_TXIDLE_FLAGS) |
3612 | set_reg_bits(info, CHA + CCR1, BIT3); | |
3613 | else | |
3614 | clear_reg_bits(info, CHA + CCR1, BIT3); | |
3615 | } | |
3616 | ||
3617 | /* get state of the V24 status (input) signals. | |
3618 | */ | |
cdaad343 | 3619 | static void get_signals(MGSLPC_INFO *info) |
1da177e4 LT |
3620 | { |
3621 | unsigned char status = 0; | |
d12341f9 JG |
3622 | |
3623 | /* preserve DTR and RTS */ | |
1da177e4 LT |
3624 | info->serial_signals &= SerialSignal_DTR + SerialSignal_RTS; |
3625 | ||
3626 | if (read_reg(info, CHB + VSTR) & BIT7) | |
3627 | info->serial_signals |= SerialSignal_DCD; | |
3628 | if (read_reg(info, CHB + STAR) & BIT1) | |
3629 | info->serial_signals |= SerialSignal_CTS; | |
3630 | ||
3631 | status = read_reg(info, CHA + PVR); | |
3632 | if (!(status & PVR_RI)) | |
3633 | info->serial_signals |= SerialSignal_RI; | |
3634 | if (!(status & PVR_DSR)) | |
3635 | info->serial_signals |= SerialSignal_DSR; | |
3636 | } | |
3637 | ||
3638 | /* Set the state of DTR and RTS based on contents of | |
3639 | * serial_signals member of device extension. | |
3640 | */ | |
cdaad343 | 3641 | static void set_signals(MGSLPC_INFO *info) |
1da177e4 LT |
3642 | { |
3643 | unsigned char val; | |
3644 | ||
3645 | val = read_reg(info, CHA + MODE); | |
3646 | if (info->params.mode == MGSL_MODE_ASYNC) { | |
3647 | if (info->serial_signals & SerialSignal_RTS) | |
3648 | val &= ~BIT6; | |
3649 | else | |
3650 | val |= BIT6; | |
3651 | } else { | |
3652 | if (info->serial_signals & SerialSignal_RTS) | |
3653 | val |= BIT2; | |
3654 | else | |
3655 | val &= ~BIT2; | |
3656 | } | |
3657 | write_reg(info, CHA + MODE, val); | |
3658 | ||
3659 | if (info->serial_signals & SerialSignal_DTR) | |
3660 | clear_reg_bits(info, CHA + PVR, PVR_DTR); | |
3661 | else | |
3662 | set_reg_bits(info, CHA + PVR, PVR_DTR); | |
3663 | } | |
3664 | ||
cdaad343 | 3665 | static void rx_reset_buffers(MGSLPC_INFO *info) |
1da177e4 LT |
3666 | { |
3667 | RXBUF *buf; | |
3668 | int i; | |
3669 | ||
3670 | info->rx_put = 0; | |
3671 | info->rx_get = 0; | |
3672 | info->rx_frame_count = 0; | |
3673 | for (i=0 ; i < info->rx_buf_count ; i++) { | |
3674 | buf = (RXBUF*)(info->rx_buf + (i * info->rx_buf_size)); | |
3675 | buf->status = buf->count = 0; | |
3676 | } | |
3677 | } | |
3678 | ||
3679 | /* Attempt to return a received HDLC frame | |
3680 | * Only frames received without errors are returned. | |
3681 | * | |
0fab6de0 | 3682 | * Returns true if frame returned, otherwise false |
1da177e4 | 3683 | */ |
eeb46134 | 3684 | static bool rx_get_frame(MGSLPC_INFO *info, struct tty_struct *tty) |
1da177e4 LT |
3685 | { |
3686 | unsigned short status; | |
3687 | RXBUF *buf; | |
3688 | unsigned int framesize = 0; | |
3689 | unsigned long flags; | |
0fab6de0 | 3690 | bool return_frame = false; |
d12341f9 | 3691 | |
1da177e4 | 3692 | if (info->rx_frame_count == 0) |
0fab6de0 | 3693 | return false; |
1da177e4 LT |
3694 | |
3695 | buf = (RXBUF*)(info->rx_buf + (info->rx_get * info->rx_buf_size)); | |
3696 | ||
3697 | status = buf->status; | |
3698 | ||
3699 | /* 07 VFR 1=valid frame | |
3700 | * 06 RDO 1=data overrun | |
3701 | * 05 CRC 1=OK, 0=error | |
3702 | * 04 RAB 1=frame aborted | |
3703 | */ | |
3704 | if ((status & 0xf0) != 0xA0) { | |
3705 | if (!(status & BIT7) || (status & BIT4)) | |
3706 | info->icount.rxabort++; | |
3707 | else if (status & BIT6) | |
3708 | info->icount.rxover++; | |
3709 | else if (!(status & BIT5)) { | |
3710 | info->icount.rxcrc++; | |
3711 | if (info->params.crc_type & HDLC_CRC_RETURN_EX) | |
0fab6de0 | 3712 | return_frame = true; |
1da177e4 LT |
3713 | } |
3714 | framesize = 0; | |
af69c7f9 | 3715 | #if SYNCLINK_GENERIC_HDLC |
1da177e4 | 3716 | { |
198191c4 KH |
3717 | info->netdev->stats.rx_errors++; |
3718 | info->netdev->stats.rx_frame_errors++; | |
1da177e4 LT |
3719 | } |
3720 | #endif | |
3721 | } else | |
0fab6de0 | 3722 | return_frame = true; |
1da177e4 LT |
3723 | |
3724 | if (return_frame) | |
3725 | framesize = buf->count; | |
3726 | ||
3727 | if (debug_level >= DEBUG_LEVEL_BH) | |
3728 | printk("%s(%d):rx_get_frame(%s) status=%04X size=%d\n", | |
3729 | __FILE__,__LINE__,info->device_name,status,framesize); | |
d12341f9 | 3730 | |
1da177e4 | 3731 | if (debug_level >= DEBUG_LEVEL_DATA) |
d12341f9 JG |
3732 | trace_block(info, buf->data, framesize, 0); |
3733 | ||
1da177e4 LT |
3734 | if (framesize) { |
3735 | if ((info->params.crc_type & HDLC_CRC_RETURN_EX && | |
3736 | framesize+1 > info->max_frame_size) || | |
3737 | framesize > info->max_frame_size) | |
3738 | info->icount.rxlong++; | |
3739 | else { | |
3740 | if (status & BIT5) | |
3741 | info->icount.rxok++; | |
3742 | ||
3743 | if (info->params.crc_type & HDLC_CRC_RETURN_EX) { | |
3744 | *(buf->data + framesize) = status & BIT5 ? RX_OK:RX_CRC_ERROR; | |
3745 | ++framesize; | |
3746 | } | |
3747 | ||
af69c7f9 | 3748 | #if SYNCLINK_GENERIC_HDLC |
1da177e4 LT |
3749 | if (info->netcount) |
3750 | hdlcdev_rx(info, buf->data, framesize); | |
3751 | else | |
3752 | #endif | |
3753 | ldisc_receive_buf(tty, buf->data, info->flag_buf, framesize); | |
3754 | } | |
3755 | } | |
3756 | ||
3757 | spin_lock_irqsave(&info->lock,flags); | |
3758 | buf->status = buf->count = 0; | |
3759 | info->rx_frame_count--; | |
3760 | info->rx_get++; | |
3761 | if (info->rx_get >= info->rx_buf_count) | |
3762 | info->rx_get = 0; | |
3763 | spin_unlock_irqrestore(&info->lock,flags); | |
3764 | ||
0fab6de0 | 3765 | return true; |
1da177e4 LT |
3766 | } |
3767 | ||
0fab6de0 | 3768 | static bool register_test(MGSLPC_INFO *info) |
1da177e4 | 3769 | { |
d12341f9 | 3770 | static unsigned char patterns[] = |
1da177e4 | 3771 | { 0x00, 0xff, 0xaa, 0x55, 0x69, 0x96, 0x0f }; |
fe971071 | 3772 | static unsigned int count = ARRAY_SIZE(patterns); |
1da177e4 | 3773 | unsigned int i; |
0fab6de0 | 3774 | bool rc = true; |
1da177e4 LT |
3775 | unsigned long flags; |
3776 | ||
3777 | spin_lock_irqsave(&info->lock,flags); | |
3778 | reset_device(info); | |
3779 | ||
3780 | for (i = 0; i < count; i++) { | |
3781 | write_reg(info, XAD1, patterns[i]); | |
3782 | write_reg(info, XAD2, patterns[(i + 1) % count]); | |
fe971071 | 3783 | if ((read_reg(info, XAD1) != patterns[i]) || |
1da177e4 | 3784 | (read_reg(info, XAD2) != patterns[(i + 1) % count])) { |
0fab6de0 | 3785 | rc = false; |
1da177e4 LT |
3786 | break; |
3787 | } | |
3788 | } | |
3789 | ||
3790 | spin_unlock_irqrestore(&info->lock,flags); | |
3791 | return rc; | |
3792 | } | |
3793 | ||
0fab6de0 | 3794 | static bool irq_test(MGSLPC_INFO *info) |
1da177e4 LT |
3795 | { |
3796 | unsigned long end_time; | |
3797 | unsigned long flags; | |
3798 | ||
3799 | spin_lock_irqsave(&info->lock,flags); | |
3800 | reset_device(info); | |
3801 | ||
0fab6de0 | 3802 | info->testing_irq = true; |
1da177e4 LT |
3803 | hdlc_mode(info); |
3804 | ||
0fab6de0 | 3805 | info->irq_occurred = false; |
1da177e4 LT |
3806 | |
3807 | /* init hdlc mode */ | |
3808 | ||
3809 | irq_enable(info, CHA, IRQ_TIMER); | |
3810 | write_reg(info, CHA + TIMR, 0); /* 512 cycles */ | |
3811 | issue_command(info, CHA, CMD_START_TIMER); | |
3812 | ||
3813 | spin_unlock_irqrestore(&info->lock,flags); | |
3814 | ||
3815 | end_time=100; | |
3816 | while(end_time-- && !info->irq_occurred) { | |
3817 | msleep_interruptible(10); | |
3818 | } | |
d12341f9 | 3819 | |
0fab6de0 | 3820 | info->testing_irq = false; |
1da177e4 LT |
3821 | |
3822 | spin_lock_irqsave(&info->lock,flags); | |
3823 | reset_device(info); | |
3824 | spin_unlock_irqrestore(&info->lock,flags); | |
d12341f9 | 3825 | |
0fab6de0 | 3826 | return info->irq_occurred; |
1da177e4 LT |
3827 | } |
3828 | ||
cdaad343 | 3829 | static int adapter_test(MGSLPC_INFO *info) |
1da177e4 LT |
3830 | { |
3831 | if (!register_test(info)) { | |
3832 | info->init_error = DiagStatus_AddressFailure; | |
3833 | printk( "%s(%d):Register test failure for device %s Addr=%04X\n", | |
3834 | __FILE__,__LINE__,info->device_name, (unsigned short)(info->io_base) ); | |
3835 | return -ENODEV; | |
3836 | } | |
3837 | ||
3838 | if (!irq_test(info)) { | |
3839 | info->init_error = DiagStatus_IrqFailure; | |
3840 | printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n", | |
3841 | __FILE__,__LINE__,info->device_name, (unsigned short)(info->irq_level) ); | |
3842 | return -ENODEV; | |
3843 | } | |
3844 | ||
3845 | if (debug_level >= DEBUG_LEVEL_INFO) | |
3846 | printk("%s(%d):device %s passed diagnostics\n", | |
3847 | __FILE__,__LINE__,info->device_name); | |
3848 | return 0; | |
3849 | } | |
3850 | ||
cdaad343 | 3851 | static void trace_block(MGSLPC_INFO *info,const char* data, int count, int xmit) |
1da177e4 LT |
3852 | { |
3853 | int i; | |
3854 | int linecount; | |
3855 | if (xmit) | |
3856 | printk("%s tx data:\n",info->device_name); | |
3857 | else | |
3858 | printk("%s rx data:\n",info->device_name); | |
d12341f9 | 3859 | |
1da177e4 LT |
3860 | while(count) { |
3861 | if (count > 16) | |
3862 | linecount = 16; | |
3863 | else | |
3864 | linecount = count; | |
d12341f9 | 3865 | |
1da177e4 LT |
3866 | for(i=0;i<linecount;i++) |
3867 | printk("%02X ",(unsigned char)data[i]); | |
3868 | for(;i<17;i++) | |
3869 | printk(" "); | |
3870 | for(i=0;i<linecount;i++) { | |
3871 | if (data[i]>=040 && data[i]<=0176) | |
3872 | printk("%c",data[i]); | |
3873 | else | |
3874 | printk("."); | |
3875 | } | |
3876 | printk("\n"); | |
d12341f9 | 3877 | |
1da177e4 LT |
3878 | data += linecount; |
3879 | count -= linecount; | |
3880 | } | |
3881 | } | |
3882 | ||
3883 | /* HDLC frame time out | |
3884 | * update stats and do tx completion processing | |
3885 | */ | |
cdaad343 | 3886 | static void tx_timeout(unsigned long context) |
1da177e4 LT |
3887 | { |
3888 | MGSLPC_INFO *info = (MGSLPC_INFO*)context; | |
3889 | unsigned long flags; | |
d12341f9 | 3890 | |
1da177e4 LT |
3891 | if ( debug_level >= DEBUG_LEVEL_INFO ) |
3892 | printk( "%s(%d):tx_timeout(%s)\n", | |
3893 | __FILE__,__LINE__,info->device_name); | |
3894 | if(info->tx_active && | |
3895 | info->params.mode == MGSL_MODE_HDLC) { | |
3896 | info->icount.txtimeout++; | |
3897 | } | |
3898 | spin_lock_irqsave(&info->lock,flags); | |
0fab6de0 | 3899 | info->tx_active = false; |
1da177e4 LT |
3900 | info->tx_count = info->tx_put = info->tx_get = 0; |
3901 | ||
3902 | spin_unlock_irqrestore(&info->lock,flags); | |
d12341f9 | 3903 | |
af69c7f9 | 3904 | #if SYNCLINK_GENERIC_HDLC |
1da177e4 LT |
3905 | if (info->netcount) |
3906 | hdlcdev_tx_done(info); | |
3907 | else | |
3908 | #endif | |
eeb46134 AC |
3909 | { |
3910 | struct tty_struct *tty = tty_port_tty_get(&info->port); | |
3911 | bh_transmit(info, tty); | |
3912 | tty_kref_put(tty); | |
3913 | } | |
1da177e4 LT |
3914 | } |
3915 | ||
af69c7f9 | 3916 | #if SYNCLINK_GENERIC_HDLC |
1da177e4 LT |
3917 | |
3918 | /** | |
3919 | * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.) | |
3920 | * set encoding and frame check sequence (FCS) options | |
3921 | * | |
3922 | * dev pointer to network device structure | |
3923 | * encoding serial encoding setting | |
3924 | * parity FCS setting | |
3925 | * | |
3926 | * returns 0 if success, otherwise error code | |
3927 | */ | |
3928 | static int hdlcdev_attach(struct net_device *dev, unsigned short encoding, | |
3929 | unsigned short parity) | |
3930 | { | |
3931 | MGSLPC_INFO *info = dev_to_port(dev); | |
eeb46134 | 3932 | struct tty_struct *tty; |
1da177e4 LT |
3933 | unsigned char new_encoding; |
3934 | unsigned short new_crctype; | |
3935 | ||
3936 | /* return error if TTY interface open */ | |
eeb46134 | 3937 | if (info->port.count) |
1da177e4 LT |
3938 | return -EBUSY; |
3939 | ||
3940 | switch (encoding) | |
3941 | { | |
3942 | case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break; | |
3943 | case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break; | |
3944 | case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break; | |
3945 | case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break; | |
3946 | case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break; | |
3947 | default: return -EINVAL; | |
3948 | } | |
3949 | ||
3950 | switch (parity) | |
3951 | { | |
3952 | case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break; | |
3953 | case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break; | |
3954 | case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break; | |
3955 | default: return -EINVAL; | |
3956 | } | |
3957 | ||
3958 | info->params.encoding = new_encoding; | |
53b3531b | 3959 | info->params.crc_type = new_crctype; |
1da177e4 LT |
3960 | |
3961 | /* if network interface up, reprogram hardware */ | |
eeb46134 AC |
3962 | if (info->netcount) { |
3963 | tty = tty_port_tty_get(&info->port); | |
3964 | mgslpc_program_hw(info, tty); | |
3965 | tty_kref_put(tty); | |
3966 | } | |
1da177e4 LT |
3967 | |
3968 | return 0; | |
3969 | } | |
3970 | ||
3971 | /** | |
3972 | * called by generic HDLC layer to send frame | |
3973 | * | |
3974 | * skb socket buffer containing HDLC frame | |
3975 | * dev pointer to network device structure | |
1da177e4 | 3976 | */ |
4c5d502d SH |
3977 | static netdev_tx_t hdlcdev_xmit(struct sk_buff *skb, |
3978 | struct net_device *dev) | |
1da177e4 LT |
3979 | { |
3980 | MGSLPC_INFO *info = dev_to_port(dev); | |
1da177e4 LT |
3981 | unsigned long flags; |
3982 | ||
3983 | if (debug_level >= DEBUG_LEVEL_INFO) | |
3984 | printk(KERN_INFO "%s:hdlc_xmit(%s)\n",__FILE__,dev->name); | |
3985 | ||
3986 | /* stop sending until this frame completes */ | |
3987 | netif_stop_queue(dev); | |
3988 | ||
3989 | /* copy data to device buffers */ | |
d626f62b | 3990 | skb_copy_from_linear_data(skb, info->tx_buf, skb->len); |
1da177e4 LT |
3991 | info->tx_get = 0; |
3992 | info->tx_put = info->tx_count = skb->len; | |
3993 | ||
3994 | /* update network statistics */ | |
198191c4 KH |
3995 | dev->stats.tx_packets++; |
3996 | dev->stats.tx_bytes += skb->len; | |
1da177e4 LT |
3997 | |
3998 | /* done with socket buffer, so free it */ | |
3999 | dev_kfree_skb(skb); | |
4000 | ||
4001 | /* save start time for transmit timeout detection */ | |
4002 | dev->trans_start = jiffies; | |
4003 | ||
4004 | /* start hardware transmitter if necessary */ | |
4005 | spin_lock_irqsave(&info->lock,flags); | |
eeb46134 AC |
4006 | if (!info->tx_active) { |
4007 | struct tty_struct *tty = tty_port_tty_get(&info->port); | |
4008 | tx_start(info, tty); | |
4009 | tty_kref_put(tty); | |
4010 | } | |
1da177e4 LT |
4011 | spin_unlock_irqrestore(&info->lock,flags); |
4012 | ||
4c5d502d | 4013 | return NETDEV_TX_OK; |
1da177e4 LT |
4014 | } |
4015 | ||
4016 | /** | |
4017 | * called by network layer when interface enabled | |
4018 | * claim resources and initialize hardware | |
4019 | * | |
4020 | * dev pointer to network device structure | |
4021 | * | |
4022 | * returns 0 if success, otherwise error code | |
4023 | */ | |
4024 | static int hdlcdev_open(struct net_device *dev) | |
4025 | { | |
4026 | MGSLPC_INFO *info = dev_to_port(dev); | |
eeb46134 | 4027 | struct tty_struct *tty; |
1da177e4 LT |
4028 | int rc; |
4029 | unsigned long flags; | |
4030 | ||
4031 | if (debug_level >= DEBUG_LEVEL_INFO) | |
4032 | printk("%s:hdlcdev_open(%s)\n",__FILE__,dev->name); | |
4033 | ||
4034 | /* generic HDLC layer open processing */ | |
4035 | if ((rc = hdlc_open(dev))) | |
4036 | return rc; | |
4037 | ||
4038 | /* arbitrate between network and tty opens */ | |
4039 | spin_lock_irqsave(&info->netlock, flags); | |
eeb46134 | 4040 | if (info->port.count != 0 || info->netcount != 0) { |
1da177e4 LT |
4041 | printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name); |
4042 | spin_unlock_irqrestore(&info->netlock, flags); | |
4043 | return -EBUSY; | |
4044 | } | |
4045 | info->netcount=1; | |
4046 | spin_unlock_irqrestore(&info->netlock, flags); | |
4047 | ||
eeb46134 | 4048 | tty = tty_port_tty_get(&info->port); |
1da177e4 | 4049 | /* claim resources and init adapter */ |
eeb46134 AC |
4050 | if ((rc = startup(info, tty)) != 0) { |
4051 | tty_kref_put(tty); | |
1da177e4 LT |
4052 | spin_lock_irqsave(&info->netlock, flags); |
4053 | info->netcount=0; | |
4054 | spin_unlock_irqrestore(&info->netlock, flags); | |
4055 | return rc; | |
4056 | } | |
1da177e4 LT |
4057 | /* assert DTR and RTS, apply hardware settings */ |
4058 | info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; | |
eeb46134 AC |
4059 | mgslpc_program_hw(info, tty); |
4060 | tty_kref_put(tty); | |
1da177e4 LT |
4061 | |
4062 | /* enable network layer transmit */ | |
4063 | dev->trans_start = jiffies; | |
4064 | netif_start_queue(dev); | |
4065 | ||
4066 | /* inform generic HDLC layer of current DCD status */ | |
4067 | spin_lock_irqsave(&info->lock, flags); | |
4068 | get_signals(info); | |
4069 | spin_unlock_irqrestore(&info->lock, flags); | |
fbeff3c1 KH |
4070 | if (info->serial_signals & SerialSignal_DCD) |
4071 | netif_carrier_on(dev); | |
4072 | else | |
4073 | netif_carrier_off(dev); | |
1da177e4 LT |
4074 | return 0; |
4075 | } | |
4076 | ||
4077 | /** | |
4078 | * called by network layer when interface is disabled | |
4079 | * shutdown hardware and release resources | |
4080 | * | |
4081 | * dev pointer to network device structure | |
4082 | * | |
4083 | * returns 0 if success, otherwise error code | |
4084 | */ | |
4085 | static int hdlcdev_close(struct net_device *dev) | |
4086 | { | |
4087 | MGSLPC_INFO *info = dev_to_port(dev); | |
eeb46134 | 4088 | struct tty_struct *tty = tty_port_tty_get(&info->port); |
1da177e4 LT |
4089 | unsigned long flags; |
4090 | ||
4091 | if (debug_level >= DEBUG_LEVEL_INFO) | |
4092 | printk("%s:hdlcdev_close(%s)\n",__FILE__,dev->name); | |
4093 | ||
4094 | netif_stop_queue(dev); | |
4095 | ||
4096 | /* shutdown adapter and release resources */ | |
eeb46134 AC |
4097 | shutdown(info, tty); |
4098 | tty_kref_put(tty); | |
1da177e4 LT |
4099 | hdlc_close(dev); |
4100 | ||
4101 | spin_lock_irqsave(&info->netlock, flags); | |
4102 | info->netcount=0; | |
4103 | spin_unlock_irqrestore(&info->netlock, flags); | |
4104 | ||
4105 | return 0; | |
4106 | } | |
4107 | ||
4108 | /** | |
4109 | * called by network layer to process IOCTL call to network device | |
4110 | * | |
4111 | * dev pointer to network device structure | |
4112 | * ifr pointer to network interface request structure | |
4113 | * cmd IOCTL command code | |
4114 | * | |
4115 | * returns 0 if success, otherwise error code | |
4116 | */ | |
4117 | static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
4118 | { | |
4119 | const size_t size = sizeof(sync_serial_settings); | |
4120 | sync_serial_settings new_line; | |
4121 | sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync; | |
4122 | MGSLPC_INFO *info = dev_to_port(dev); | |
4123 | unsigned int flags; | |
4124 | ||
4125 | if (debug_level >= DEBUG_LEVEL_INFO) | |
4126 | printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name); | |
4127 | ||
4128 | /* return error if TTY interface open */ | |
eeb46134 | 4129 | if (info->port.count) |
1da177e4 LT |
4130 | return -EBUSY; |
4131 | ||
4132 | if (cmd != SIOCWANDEV) | |
4133 | return hdlc_ioctl(dev, ifr, cmd); | |
4134 | ||
4135 | switch(ifr->ifr_settings.type) { | |
4136 | case IF_GET_IFACE: /* return current sync_serial_settings */ | |
4137 | ||
4138 | ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL; | |
4139 | if (ifr->ifr_settings.size < size) { | |
4140 | ifr->ifr_settings.size = size; /* data size wanted */ | |
4141 | return -ENOBUFS; | |
4142 | } | |
4143 | ||
4144 | flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | | |
4145 | HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | | |
4146 | HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | | |
4147 | HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); | |
4148 | ||
4149 | switch (flags){ | |
4150 | case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break; | |
4151 | case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break; | |
4152 | case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break; | |
4153 | case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break; | |
4154 | default: new_line.clock_type = CLOCK_DEFAULT; | |
4155 | } | |
4156 | ||
4157 | new_line.clock_rate = info->params.clock_speed; | |
4158 | new_line.loopback = info->params.loopback ? 1:0; | |
4159 | ||
4160 | if (copy_to_user(line, &new_line, size)) | |
4161 | return -EFAULT; | |
4162 | return 0; | |
4163 | ||
4164 | case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */ | |
4165 | ||
4166 | if(!capable(CAP_NET_ADMIN)) | |
4167 | return -EPERM; | |
4168 | if (copy_from_user(&new_line, line, size)) | |
4169 | return -EFAULT; | |
4170 | ||
4171 | switch (new_line.clock_type) | |
4172 | { | |
4173 | case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break; | |
4174 | case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break; | |
4175 | case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break; | |
4176 | case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break; | |
4177 | case CLOCK_DEFAULT: flags = info->params.flags & | |
4178 | (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | | |
4179 | HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | | |
4180 | HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | | |
4181 | HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break; | |
4182 | default: return -EINVAL; | |
4183 | } | |
4184 | ||
4185 | if (new_line.loopback != 0 && new_line.loopback != 1) | |
4186 | return -EINVAL; | |
4187 | ||
4188 | info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | | |
4189 | HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | | |
4190 | HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | | |
4191 | HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); | |
4192 | info->params.flags |= flags; | |
4193 | ||
4194 | info->params.loopback = new_line.loopback; | |
4195 | ||
4196 | if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG)) | |
4197 | info->params.clock_speed = new_line.clock_rate; | |
4198 | else | |
4199 | info->params.clock_speed = 0; | |
4200 | ||
4201 | /* if network interface up, reprogram hardware */ | |
eeb46134 AC |
4202 | if (info->netcount) { |
4203 | struct tty_struct *tty = tty_port_tty_get(&info->port); | |
4204 | mgslpc_program_hw(info, tty); | |
4205 | tty_kref_put(tty); | |
4206 | } | |
1da177e4 LT |
4207 | return 0; |
4208 | ||
4209 | default: | |
4210 | return hdlc_ioctl(dev, ifr, cmd); | |
4211 | } | |
4212 | } | |
4213 | ||
4214 | /** | |
4215 | * called by network layer when transmit timeout is detected | |
4216 | * | |
4217 | * dev pointer to network device structure | |
4218 | */ | |
4219 | static void hdlcdev_tx_timeout(struct net_device *dev) | |
4220 | { | |
4221 | MGSLPC_INFO *info = dev_to_port(dev); | |
1da177e4 LT |
4222 | unsigned long flags; |
4223 | ||
4224 | if (debug_level >= DEBUG_LEVEL_INFO) | |
4225 | printk("hdlcdev_tx_timeout(%s)\n",dev->name); | |
4226 | ||
198191c4 KH |
4227 | dev->stats.tx_errors++; |
4228 | dev->stats.tx_aborted_errors++; | |
1da177e4 LT |
4229 | |
4230 | spin_lock_irqsave(&info->lock,flags); | |
4231 | tx_stop(info); | |
4232 | spin_unlock_irqrestore(&info->lock,flags); | |
4233 | ||
4234 | netif_wake_queue(dev); | |
4235 | } | |
4236 | ||
4237 | /** | |
4238 | * called by device driver when transmit completes | |
4239 | * reenable network layer transmit if stopped | |
4240 | * | |
4241 | * info pointer to device instance information | |
4242 | */ | |
4243 | static void hdlcdev_tx_done(MGSLPC_INFO *info) | |
4244 | { | |
4245 | if (netif_queue_stopped(info->netdev)) | |
4246 | netif_wake_queue(info->netdev); | |
4247 | } | |
4248 | ||
4249 | /** | |
4250 | * called by device driver when frame received | |
4251 | * pass frame to network layer | |
4252 | * | |
4253 | * info pointer to device instance information | |
4254 | * buf pointer to buffer contianing frame data | |
4255 | * size count of data bytes in buf | |
4256 | */ | |
4257 | static void hdlcdev_rx(MGSLPC_INFO *info, char *buf, int size) | |
4258 | { | |
4259 | struct sk_buff *skb = dev_alloc_skb(size); | |
4260 | struct net_device *dev = info->netdev; | |
1da177e4 LT |
4261 | |
4262 | if (debug_level >= DEBUG_LEVEL_INFO) | |
4263 | printk("hdlcdev_rx(%s)\n",dev->name); | |
4264 | ||
4265 | if (skb == NULL) { | |
4266 | printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n", dev->name); | |
198191c4 | 4267 | dev->stats.rx_dropped++; |
1da177e4 LT |
4268 | return; |
4269 | } | |
4270 | ||
198191c4 | 4271 | memcpy(skb_put(skb, size), buf, size); |
1da177e4 | 4272 | |
198191c4 | 4273 | skb->protocol = hdlc_type_trans(skb, dev); |
1da177e4 | 4274 | |
198191c4 KH |
4275 | dev->stats.rx_packets++; |
4276 | dev->stats.rx_bytes += size; | |
1da177e4 LT |
4277 | |
4278 | netif_rx(skb); | |
1da177e4 LT |
4279 | } |
4280 | ||
991990a1 KH |
4281 | static const struct net_device_ops hdlcdev_ops = { |
4282 | .ndo_open = hdlcdev_open, | |
4283 | .ndo_stop = hdlcdev_close, | |
4284 | .ndo_change_mtu = hdlc_change_mtu, | |
4285 | .ndo_start_xmit = hdlc_start_xmit, | |
4286 | .ndo_do_ioctl = hdlcdev_ioctl, | |
4287 | .ndo_tx_timeout = hdlcdev_tx_timeout, | |
4288 | }; | |
4289 | ||
1da177e4 LT |
4290 | /** |
4291 | * called by device driver when adding device instance | |
4292 | * do generic HDLC initialization | |
4293 | * | |
4294 | * info pointer to device instance information | |
4295 | * | |
4296 | * returns 0 if success, otherwise error code | |
4297 | */ | |
4298 | static int hdlcdev_init(MGSLPC_INFO *info) | |
4299 | { | |
4300 | int rc; | |
4301 | struct net_device *dev; | |
4302 | hdlc_device *hdlc; | |
4303 | ||
4304 | /* allocate and initialize network and HDLC layer objects */ | |
4305 | ||
4306 | if (!(dev = alloc_hdlcdev(info))) { | |
4307 | printk(KERN_ERR "%s:hdlc device allocation failure\n",__FILE__); | |
4308 | return -ENOMEM; | |
4309 | } | |
4310 | ||
4311 | /* for network layer reporting purposes only */ | |
4312 | dev->base_addr = info->io_base; | |
4313 | dev->irq = info->irq_level; | |
4314 | ||
4315 | /* network layer callbacks and settings */ | |
991990a1 KH |
4316 | dev->netdev_ops = &hdlcdev_ops; |
4317 | dev->watchdog_timeo = 10 * HZ; | |
1da177e4 LT |
4318 | dev->tx_queue_len = 50; |
4319 | ||
4320 | /* generic HDLC layer callbacks and settings */ | |
4321 | hdlc = dev_to_hdlc(dev); | |
4322 | hdlc->attach = hdlcdev_attach; | |
4323 | hdlc->xmit = hdlcdev_xmit; | |
4324 | ||
4325 | /* register objects with HDLC layer */ | |
4326 | if ((rc = register_hdlc_device(dev))) { | |
4327 | printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__); | |
4328 | free_netdev(dev); | |
4329 | return rc; | |
4330 | } | |
4331 | ||
4332 | info->netdev = dev; | |
4333 | return 0; | |
4334 | } | |
4335 | ||
4336 | /** | |
4337 | * called by device driver when removing device instance | |
4338 | * do generic HDLC cleanup | |
4339 | * | |
4340 | * info pointer to device instance information | |
4341 | */ | |
4342 | static void hdlcdev_exit(MGSLPC_INFO *info) | |
4343 | { | |
4344 | unregister_hdlc_device(info->netdev); | |
4345 | free_netdev(info->netdev); | |
4346 | info->netdev = NULL; | |
4347 | } | |
4348 | ||
4349 | #endif /* CONFIG_HDLC */ | |
4350 |