Commit | Line | Data |
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1da177e4 LT |
1 | /* $Id: cosa.c,v 1.31 2000/03/08 17:47:16 kas Exp $ */ |
2 | ||
3 | /* | |
4 | * Copyright (C) 1995-1997 Jan "Yenya" Kasprzak <kas@fi.muni.cz> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | */ | |
20 | ||
21 | /* | |
22 | * The driver for the SRP and COSA synchronous serial cards. | |
23 | * | |
24 | * HARDWARE INFO | |
25 | * | |
26 | * Both cards are developed at the Institute of Computer Science, | |
27 | * Masaryk University (http://www.ics.muni.cz/). The hardware is | |
28 | * developed by Jiri Novotny <novotny@ics.muni.cz>. More information | |
29 | * and the photo of both cards is available at | |
30 | * http://www.pavoucek.cz/cosa.html. The card documentation, firmwares | |
31 | * and other goods can be downloaded from ftp://ftp.ics.muni.cz/pub/cosa/. | |
32 | * For Linux-specific utilities, see below in the "Software info" section. | |
33 | * If you want to order the card, contact Jiri Novotny. | |
34 | * | |
35 | * The SRP (serial port?, the Czech word "srp" means "sickle") card | |
36 | * is a 2-port intelligent (with its own 8-bit CPU) synchronous serial card | |
37 | * with V.24 interfaces up to 80kb/s each. | |
38 | * | |
39 | * The COSA (communication serial adapter?, the Czech word "kosa" means | |
40 | * "scythe") is a next-generation sync/async board with two interfaces | |
41 | * - currently any of V.24, X.21, V.35 and V.36 can be selected. | |
42 | * It has a 16-bit SAB80166 CPU and can do up to 10 Mb/s per channel. | |
43 | * The 8-channels version is in development. | |
44 | * | |
45 | * Both types have downloadable firmware and communicate via ISA DMA. | |
46 | * COSA can be also a bus-mastering device. | |
47 | * | |
48 | * SOFTWARE INFO | |
49 | * | |
50 | * The homepage of the Linux driver is at http://www.fi.muni.cz/~kas/cosa/. | |
51 | * The CVS tree of Linux driver can be viewed there, as well as the | |
52 | * firmware binaries and user-space utilities for downloading the firmware | |
53 | * into the card and setting up the card. | |
54 | * | |
55 | * The Linux driver (unlike the present *BSD drivers :-) can work even | |
56 | * for the COSA and SRP in one computer and allows each channel to work | |
57 | * in one of the three modes (character device, Cisco HDLC, Sync PPP). | |
58 | * | |
59 | * AUTHOR | |
60 | * | |
61 | * The Linux driver was written by Jan "Yenya" Kasprzak <kas@fi.muni.cz>. | |
62 | * | |
63 | * You can mail me bugfixes and even success reports. I am especially | |
64 | * interested in the SMP and/or muliti-channel success/failure reports | |
65 | * (I wonder if I did the locking properly :-). | |
66 | * | |
67 | * THE AUTHOR USED THE FOLLOWING SOURCES WHEN PROGRAMMING THE DRIVER | |
68 | * | |
69 | * The COSA/SRP NetBSD driver by Zdenek Salvet and Ivos Cernohlavek | |
70 | * The skeleton.c by Donald Becker | |
71 | * The SDL Riscom/N2 driver by Mike Natale | |
72 | * The Comtrol Hostess SV11 driver by Alan Cox | |
73 | * The Sync PPP/Cisco HDLC layer (syncppp.c) ported to Linux by Alan Cox | |
74 | */ | |
75 | /* | |
76 | * 5/25/1999 : Marcelo Tosatti <marcelo@conectiva.com.br> | |
77 | * fixed a deadlock in cosa_sppp_open | |
78 | */ | |
79 | \f | |
80 | /* ---------- Headers, macros, data structures ---------- */ | |
81 | ||
1da177e4 LT |
82 | #include <linux/module.h> |
83 | #include <linux/kernel.h> | |
84 | #include <linux/slab.h> | |
85 | #include <linux/poll.h> | |
86 | #include <linux/fs.h> | |
1da177e4 LT |
87 | #include <linux/interrupt.h> |
88 | #include <linux/delay.h> | |
89 | #include <linux/errno.h> | |
90 | #include <linux/ioport.h> | |
91 | #include <linux/netdevice.h> | |
92 | #include <linux/spinlock.h> | |
6387c4be | 93 | #include <linux/mutex.h> |
1da177e4 | 94 | #include <linux/device.h> |
09118107 | 95 | #include <linux/smp_lock.h> |
1da177e4 LT |
96 | |
97 | #undef COSA_SLOW_IO /* for testing purposes only */ | |
1da177e4 LT |
98 | |
99 | #include <asm/io.h> | |
100 | #include <asm/dma.h> | |
101 | #include <asm/byteorder.h> | |
102 | ||
103 | #include <net/syncppp.h> | |
104 | #include "cosa.h" | |
105 | ||
106 | /* Maximum length of the identification string. */ | |
107 | #define COSA_MAX_ID_STRING 128 | |
108 | ||
109 | /* Maximum length of the channel name */ | |
110 | #define COSA_MAX_NAME (sizeof("cosaXXXcXXX")+1) | |
111 | ||
112 | /* Per-channel data structure */ | |
113 | ||
114 | struct channel_data { | |
115 | void *if_ptr; /* General purpose pointer (used by SPPP) */ | |
116 | int usage; /* Usage count; >0 for chrdev, -1 for netdev */ | |
117 | int num; /* Number of the channel */ | |
118 | struct cosa_data *cosa; /* Pointer to the per-card structure */ | |
119 | int txsize; /* Size of transmitted data */ | |
120 | char *txbuf; /* Transmit buffer */ | |
121 | char name[COSA_MAX_NAME]; /* channel name */ | |
122 | ||
123 | /* The HW layer interface */ | |
124 | /* routine called from the RX interrupt */ | |
125 | char *(*setup_rx)(struct channel_data *channel, int size); | |
126 | /* routine called when the RX is done (from the EOT interrupt) */ | |
127 | int (*rx_done)(struct channel_data *channel); | |
128 | /* routine called when the TX is done (from the EOT interrupt) */ | |
129 | int (*tx_done)(struct channel_data *channel, int size); | |
130 | ||
131 | /* Character device parts */ | |
6387c4be MK |
132 | struct mutex rlock; |
133 | struct semaphore wsem; | |
1da177e4 LT |
134 | char *rxdata; |
135 | int rxsize; | |
136 | wait_queue_head_t txwaitq, rxwaitq; | |
137 | int tx_status, rx_status; | |
138 | ||
139 | /* SPPP/HDLC device parts */ | |
140 | struct ppp_device pppdev; | |
141 | struct sk_buff *rx_skb, *tx_skb; | |
142 | struct net_device_stats stats; | |
143 | }; | |
144 | ||
145 | /* cosa->firmware_status bits */ | |
146 | #define COSA_FW_RESET (1<<0) /* Is the ROM monitor active? */ | |
147 | #define COSA_FW_DOWNLOAD (1<<1) /* Is the microcode downloaded? */ | |
148 | #define COSA_FW_START (1<<2) /* Is the microcode running? */ | |
149 | ||
150 | struct cosa_data { | |
151 | int num; /* Card number */ | |
152 | char name[COSA_MAX_NAME]; /* Card name - e.g "cosa0" */ | |
153 | unsigned int datareg, statusreg; /* I/O ports */ | |
154 | unsigned short irq, dma; /* IRQ and DMA number */ | |
155 | unsigned short startaddr; /* Firmware start address */ | |
156 | unsigned short busmaster; /* Use busmastering? */ | |
157 | int nchannels; /* # of channels on this card */ | |
158 | int driver_status; /* For communicating with firmware */ | |
159 | int firmware_status; /* Downloaded, reseted, etc. */ | |
64b33619 AV |
160 | unsigned long rxbitmap, txbitmap;/* Bitmap of channels who are willing to send/receive data */ |
161 | unsigned long rxtx; /* RX or TX in progress? */ | |
1da177e4 LT |
162 | int enabled; |
163 | int usage; /* usage count */ | |
164 | int txchan, txsize, rxsize; | |
165 | struct channel_data *rxchan; | |
166 | char *bouncebuf; | |
167 | char *txbuf, *rxbuf; | |
168 | struct channel_data *chan; | |
169 | spinlock_t lock; /* For exclusive operations on this structure */ | |
170 | char id_string[COSA_MAX_ID_STRING]; /* ROM monitor ID string */ | |
171 | char *type; /* card type */ | |
172 | }; | |
173 | ||
174 | /* | |
175 | * Define this if you want all the possible ports to be autoprobed. | |
176 | * It is here but it probably is not a good idea to use this. | |
177 | */ | |
178 | /* #define COSA_ISA_AUTOPROBE 1 */ | |
179 | ||
180 | /* | |
181 | * Character device major number. 117 was allocated for us. | |
182 | * The value of 0 means to allocate a first free one. | |
183 | */ | |
184 | static int cosa_major = 117; | |
185 | ||
186 | /* | |
187 | * Encoding of the minor numbers: | |
188 | * The lowest CARD_MINOR_BITS bits means the channel on the single card, | |
189 | * the highest bits means the card number. | |
190 | */ | |
191 | #define CARD_MINOR_BITS 4 /* How many bits in minor number are reserved | |
192 | * for the single card */ | |
193 | /* | |
194 | * The following depends on CARD_MINOR_BITS. Unfortunately, the "MODULE_STRING" | |
195 | * macro doesn't like anything other than the raw number as an argument :-( | |
196 | */ | |
197 | #define MAX_CARDS 16 | |
198 | /* #define MAX_CARDS (1 << (8-CARD_MINOR_BITS)) */ | |
199 | ||
200 | #define DRIVER_RX_READY 0x0001 | |
201 | #define DRIVER_TX_READY 0x0002 | |
202 | #define DRIVER_TXMAP_SHIFT 2 | |
203 | #define DRIVER_TXMAP_MASK 0x0c /* FIXME: 0xfc for 8-channel version */ | |
204 | ||
205 | /* | |
206 | * for cosa->rxtx - indicates whether either transmit or receive is | |
207 | * in progress. These values are mean number of the bit. | |
208 | */ | |
209 | #define TXBIT 0 | |
210 | #define RXBIT 1 | |
211 | #define IRQBIT 2 | |
212 | ||
213 | #define COSA_MTU 2000 /* FIXME: I don't know this exactly */ | |
214 | ||
215 | #undef DEBUG_DATA //1 /* Dump the data read or written to the channel */ | |
216 | #undef DEBUG_IRQS //1 /* Print the message when the IRQ is received */ | |
217 | #undef DEBUG_IO //1 /* Dump the I/O traffic */ | |
218 | ||
219 | #define TX_TIMEOUT (5*HZ) | |
220 | ||
221 | /* Maybe the following should be allocated dynamically */ | |
222 | static struct cosa_data cosa_cards[MAX_CARDS]; | |
223 | static int nr_cards; | |
224 | ||
225 | #ifdef COSA_ISA_AUTOPROBE | |
226 | static int io[MAX_CARDS+1] = { 0x220, 0x228, 0x210, 0x218, 0, }; | |
227 | /* NOTE: DMA is not autoprobed!!! */ | |
228 | static int dma[MAX_CARDS+1] = { 1, 7, 1, 7, 1, 7, 1, 7, 0, }; | |
229 | #else | |
230 | static int io[MAX_CARDS+1]; | |
231 | static int dma[MAX_CARDS+1]; | |
232 | #endif | |
233 | /* IRQ can be safely autoprobed */ | |
234 | static int irq[MAX_CARDS+1] = { -1, -1, -1, -1, -1, -1, 0, }; | |
235 | ||
236 | /* for class stuff*/ | |
56b22935 | 237 | static struct class *cosa_class; |
1da177e4 LT |
238 | |
239 | #ifdef MODULE | |
240 | module_param_array(io, int, NULL, 0); | |
241 | MODULE_PARM_DESC(io, "The I/O bases of the COSA or SRP cards"); | |
242 | module_param_array(irq, int, NULL, 0); | |
243 | MODULE_PARM_DESC(irq, "The IRQ lines of the COSA or SRP cards"); | |
244 | module_param_array(dma, int, NULL, 0); | |
245 | MODULE_PARM_DESC(dma, "The DMA channels of the COSA or SRP cards"); | |
246 | ||
247 | MODULE_AUTHOR("Jan \"Yenya\" Kasprzak, <kas@fi.muni.cz>"); | |
248 | MODULE_DESCRIPTION("Modular driver for the COSA or SRP synchronous card"); | |
249 | MODULE_LICENSE("GPL"); | |
250 | #endif | |
251 | ||
252 | /* I use this mainly for testing purposes */ | |
253 | #ifdef COSA_SLOW_IO | |
254 | #define cosa_outb outb_p | |
255 | #define cosa_outw outw_p | |
256 | #define cosa_inb inb_p | |
257 | #define cosa_inw inw_p | |
258 | #else | |
259 | #define cosa_outb outb | |
260 | #define cosa_outw outw | |
261 | #define cosa_inb inb | |
262 | #define cosa_inw inw | |
263 | #endif | |
264 | ||
265 | #define is_8bit(cosa) (!(cosa->datareg & 0x08)) | |
266 | ||
267 | #define cosa_getstatus(cosa) (cosa_inb(cosa->statusreg)) | |
268 | #define cosa_putstatus(cosa, stat) (cosa_outb(stat, cosa->statusreg)) | |
269 | #define cosa_getdata16(cosa) (cosa_inw(cosa->datareg)) | |
270 | #define cosa_getdata8(cosa) (cosa_inb(cosa->datareg)) | |
271 | #define cosa_putdata16(cosa, dt) (cosa_outw(dt, cosa->datareg)) | |
272 | #define cosa_putdata8(cosa, dt) (cosa_outb(dt, cosa->datareg)) | |
273 | ||
274 | /* Initialization stuff */ | |
275 | static int cosa_probe(int ioaddr, int irq, int dma); | |
276 | ||
277 | /* HW interface */ | |
278 | static void cosa_enable_rx(struct channel_data *chan); | |
279 | static void cosa_disable_rx(struct channel_data *chan); | |
280 | static int cosa_start_tx(struct channel_data *channel, char *buf, int size); | |
281 | static void cosa_kick(struct cosa_data *cosa); | |
282 | static int cosa_dma_able(struct channel_data *chan, char *buf, int data); | |
283 | ||
284 | /* SPPP/HDLC stuff */ | |
285 | static void sppp_channel_init(struct channel_data *chan); | |
286 | static void sppp_channel_delete(struct channel_data *chan); | |
287 | static int cosa_sppp_open(struct net_device *d); | |
288 | static int cosa_sppp_close(struct net_device *d); | |
289 | static void cosa_sppp_timeout(struct net_device *d); | |
290 | static int cosa_sppp_tx(struct sk_buff *skb, struct net_device *d); | |
291 | static char *sppp_setup_rx(struct channel_data *channel, int size); | |
292 | static int sppp_rx_done(struct channel_data *channel); | |
293 | static int sppp_tx_done(struct channel_data *channel, int size); | |
294 | static int cosa_sppp_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd); | |
295 | static struct net_device_stats *cosa_net_stats(struct net_device *dev); | |
296 | ||
297 | /* Character device */ | |
298 | static void chardev_channel_init(struct channel_data *chan); | |
299 | static char *chrdev_setup_rx(struct channel_data *channel, int size); | |
300 | static int chrdev_rx_done(struct channel_data *channel); | |
301 | static int chrdev_tx_done(struct channel_data *channel, int size); | |
302 | static ssize_t cosa_read(struct file *file, | |
303 | char __user *buf, size_t count, loff_t *ppos); | |
304 | static ssize_t cosa_write(struct file *file, | |
305 | const char __user *buf, size_t count, loff_t *ppos); | |
306 | static unsigned int cosa_poll(struct file *file, poll_table *poll); | |
307 | static int cosa_open(struct inode *inode, struct file *file); | |
308 | static int cosa_release(struct inode *inode, struct file *file); | |
309 | static int cosa_chardev_ioctl(struct inode *inode, struct file *file, | |
310 | unsigned int cmd, unsigned long arg); | |
311 | #ifdef COSA_FASYNC_WORKING | |
312 | static int cosa_fasync(struct inode *inode, struct file *file, int on); | |
313 | #endif | |
314 | ||
d54b1fdb | 315 | static const struct file_operations cosa_fops = { |
1da177e4 LT |
316 | .owner = THIS_MODULE, |
317 | .llseek = no_llseek, | |
318 | .read = cosa_read, | |
319 | .write = cosa_write, | |
320 | .poll = cosa_poll, | |
321 | .ioctl = cosa_chardev_ioctl, | |
322 | .open = cosa_open, | |
323 | .release = cosa_release, | |
324 | #ifdef COSA_FASYNC_WORKING | |
325 | .fasync = cosa_fasync, | |
326 | #endif | |
327 | }; | |
328 | ||
329 | /* Ioctls */ | |
330 | static int cosa_start(struct cosa_data *cosa, int address); | |
331 | static int cosa_reset(struct cosa_data *cosa); | |
332 | static int cosa_download(struct cosa_data *cosa, void __user *a); | |
333 | static int cosa_readmem(struct cosa_data *cosa, void __user *a); | |
334 | ||
335 | /* COSA/SRP ROM monitor */ | |
336 | static int download(struct cosa_data *cosa, const char __user *data, int addr, int len); | |
337 | static int startmicrocode(struct cosa_data *cosa, int address); | |
338 | static int readmem(struct cosa_data *cosa, char __user *data, int addr, int len); | |
339 | static int cosa_reset_and_read_id(struct cosa_data *cosa, char *id); | |
340 | ||
341 | /* Auxilliary functions */ | |
342 | static int get_wait_data(struct cosa_data *cosa); | |
343 | static int put_wait_data(struct cosa_data *cosa, int data); | |
344 | static int puthexnumber(struct cosa_data *cosa, int number); | |
345 | static void put_driver_status(struct cosa_data *cosa); | |
346 | static void put_driver_status_nolock(struct cosa_data *cosa); | |
347 | ||
348 | /* Interrupt handling */ | |
7d12e780 | 349 | static irqreturn_t cosa_interrupt(int irq, void *cosa); |
1da177e4 LT |
350 | |
351 | /* I/O ops debugging */ | |
352 | #ifdef DEBUG_IO | |
353 | static void debug_data_in(struct cosa_data *cosa, int data); | |
354 | static void debug_data_out(struct cosa_data *cosa, int data); | |
355 | static void debug_data_cmd(struct cosa_data *cosa, int data); | |
356 | static void debug_status_in(struct cosa_data *cosa, int status); | |
357 | static void debug_status_out(struct cosa_data *cosa, int status); | |
358 | #endif | |
359 | ||
360 | \f | |
361 | /* ---------- Initialization stuff ---------- */ | |
362 | ||
363 | static int __init cosa_init(void) | |
364 | { | |
365 | int i, err = 0; | |
366 | ||
367 | printk(KERN_INFO "cosa v1.08 (c) 1997-2000 Jan Kasprzak <kas@fi.muni.cz>\n"); | |
368 | #ifdef CONFIG_SMP | |
369 | printk(KERN_INFO "cosa: SMP found. Please mail any success/failure reports to the author.\n"); | |
370 | #endif | |
371 | if (cosa_major > 0) { | |
372 | if (register_chrdev(cosa_major, "cosa", &cosa_fops)) { | |
373 | printk(KERN_WARNING "cosa: unable to get major %d\n", | |
374 | cosa_major); | |
375 | err = -EIO; | |
376 | goto out; | |
377 | } | |
378 | } else { | |
379 | if (!(cosa_major=register_chrdev(0, "cosa", &cosa_fops))) { | |
380 | printk(KERN_WARNING "cosa: unable to register chardev\n"); | |
381 | err = -EIO; | |
382 | goto out; | |
383 | } | |
384 | } | |
385 | for (i=0; i<MAX_CARDS; i++) | |
386 | cosa_cards[i].num = -1; | |
387 | for (i=0; io[i] != 0 && i < MAX_CARDS; i++) | |
388 | cosa_probe(io[i], irq[i], dma[i]); | |
389 | if (!nr_cards) { | |
390 | printk(KERN_WARNING "cosa: no devices found.\n"); | |
391 | unregister_chrdev(cosa_major, "cosa"); | |
392 | err = -ENODEV; | |
393 | goto out; | |
394 | } | |
56b22935 | 395 | cosa_class = class_create(THIS_MODULE, "cosa"); |
1da177e4 LT |
396 | if (IS_ERR(cosa_class)) { |
397 | err = PTR_ERR(cosa_class); | |
398 | goto out_chrdev; | |
399 | } | |
400 | for (i=0; i<nr_cards; i++) { | |
02ff82ca | 401 | device_create(cosa_class, NULL, MKDEV(cosa_major, i), "cosa%d", i); |
1da177e4 LT |
402 | } |
403 | err = 0; | |
404 | goto out; | |
405 | ||
406 | out_chrdev: | |
407 | unregister_chrdev(cosa_major, "cosa"); | |
408 | out: | |
409 | return err; | |
410 | } | |
411 | module_init(cosa_init); | |
412 | ||
413 | static void __exit cosa_exit(void) | |
414 | { | |
415 | struct cosa_data *cosa; | |
416 | int i; | |
417 | printk(KERN_INFO "Unloading the cosa module\n"); | |
418 | ||
8ab5e4c1 | 419 | for (i=0; i<nr_cards; i++) |
02ff82ca | 420 | device_destroy(cosa_class, MKDEV(cosa_major, i)); |
56b22935 | 421 | class_destroy(cosa_class); |
1da177e4 LT |
422 | for (cosa=cosa_cards; nr_cards--; cosa++) { |
423 | /* Clean up the per-channel data */ | |
424 | for (i=0; i<cosa->nchannels; i++) { | |
425 | /* Chardev driver has no alloc'd per-channel data */ | |
426 | sppp_channel_delete(cosa->chan+i); | |
427 | } | |
428 | /* Clean up the per-card data */ | |
429 | kfree(cosa->chan); | |
430 | kfree(cosa->bouncebuf); | |
431 | free_irq(cosa->irq, cosa); | |
432 | free_dma(cosa->dma); | |
433 | release_region(cosa->datareg,is_8bit(cosa)?2:4); | |
434 | } | |
435 | unregister_chrdev(cosa_major, "cosa"); | |
436 | } | |
437 | module_exit(cosa_exit); | |
438 | ||
439 | /* | |
440 | * This function should register all the net devices needed for the | |
441 | * single channel. | |
442 | */ | |
443 | static __inline__ void channel_init(struct channel_data *chan) | |
444 | { | |
445 | sprintf(chan->name, "cosa%dc%d", chan->cosa->num, chan->num); | |
446 | ||
447 | /* Initialize the chardev data structures */ | |
448 | chardev_channel_init(chan); | |
449 | ||
450 | /* Register the sppp interface */ | |
451 | sppp_channel_init(chan); | |
452 | } | |
453 | ||
454 | static int cosa_probe(int base, int irq, int dma) | |
455 | { | |
456 | struct cosa_data *cosa = cosa_cards+nr_cards; | |
457 | int i, err = 0; | |
458 | ||
459 | memset(cosa, 0, sizeof(struct cosa_data)); | |
460 | ||
461 | /* Checking validity of parameters: */ | |
462 | /* IRQ should be 2-7 or 10-15; negative IRQ means autoprobe */ | |
463 | if ((irq >= 0 && irq < 2) || irq > 15 || (irq < 10 && irq > 7)) { | |
464 | printk (KERN_INFO "cosa_probe: invalid IRQ %d\n", irq); | |
465 | return -1; | |
466 | } | |
467 | /* I/O address should be between 0x100 and 0x3ff and should be | |
468 | * multiple of 8. */ | |
469 | if (base < 0x100 || base > 0x3ff || base & 0x7) { | |
470 | printk (KERN_INFO "cosa_probe: invalid I/O address 0x%x\n", | |
471 | base); | |
472 | return -1; | |
473 | } | |
474 | /* DMA should be 0,1 or 3-7 */ | |
475 | if (dma < 0 || dma == 4 || dma > 7) { | |
476 | printk (KERN_INFO "cosa_probe: invalid DMA %d\n", dma); | |
477 | return -1; | |
478 | } | |
479 | /* and finally, on 16-bit COSA DMA should be 4-7 and | |
480 | * I/O base should not be multiple of 0x10 */ | |
481 | if (((base & 0x8) && dma < 4) || (!(base & 0x8) && dma > 3)) { | |
482 | printk (KERN_INFO "cosa_probe: 8/16 bit base and DMA mismatch" | |
483 | " (base=0x%x, dma=%d)\n", base, dma); | |
484 | return -1; | |
485 | } | |
486 | ||
487 | cosa->dma = dma; | |
488 | cosa->datareg = base; | |
489 | cosa->statusreg = is_8bit(cosa)?base+1:base+2; | |
490 | spin_lock_init(&cosa->lock); | |
491 | ||
492 | if (!request_region(base, is_8bit(cosa)?2:4,"cosa")) | |
493 | return -1; | |
494 | ||
495 | if (cosa_reset_and_read_id(cosa, cosa->id_string) < 0) { | |
496 | printk(KERN_DEBUG "cosa: probe at 0x%x failed.\n", base); | |
497 | err = -1; | |
498 | goto err_out; | |
499 | } | |
500 | ||
501 | /* Test the validity of identification string */ | |
502 | if (!strncmp(cosa->id_string, "SRP", 3)) | |
503 | cosa->type = "srp"; | |
504 | else if (!strncmp(cosa->id_string, "COSA", 4)) | |
505 | cosa->type = is_8bit(cosa)? "cosa8": "cosa16"; | |
506 | else { | |
507 | /* Print a warning only if we are not autoprobing */ | |
508 | #ifndef COSA_ISA_AUTOPROBE | |
509 | printk(KERN_INFO "cosa: valid signature not found at 0x%x.\n", | |
510 | base); | |
511 | #endif | |
512 | err = -1; | |
513 | goto err_out; | |
514 | } | |
515 | /* Update the name of the region now we know the type of card */ | |
516 | release_region(base, is_8bit(cosa)?2:4); | |
517 | if (!request_region(base, is_8bit(cosa)?2:4, cosa->type)) { | |
518 | printk(KERN_DEBUG "cosa: changing name at 0x%x failed.\n", base); | |
519 | return -1; | |
520 | } | |
521 | ||
522 | /* Now do IRQ autoprobe */ | |
523 | if (irq < 0) { | |
524 | unsigned long irqs; | |
525 | /* printk(KERN_INFO "IRQ autoprobe\n"); */ | |
526 | irqs = probe_irq_on(); | |
527 | /* | |
528 | * Enable interrupt on tx buffer empty (it sure is) | |
529 | * really sure ? | |
530 | * FIXME: When this code is not used as module, we should | |
531 | * probably call udelay() instead of the interruptible sleep. | |
532 | */ | |
533 | set_current_state(TASK_INTERRUPTIBLE); | |
534 | cosa_putstatus(cosa, SR_TX_INT_ENA); | |
535 | schedule_timeout(30); | |
536 | irq = probe_irq_off(irqs); | |
537 | /* Disable all IRQs from the card */ | |
538 | cosa_putstatus(cosa, 0); | |
539 | /* Empty the received data register */ | |
540 | cosa_getdata8(cosa); | |
541 | ||
542 | if (irq < 0) { | |
543 | printk (KERN_INFO "cosa IRQ autoprobe: multiple interrupts obtained (%d, board at 0x%x)\n", | |
544 | irq, cosa->datareg); | |
545 | err = -1; | |
546 | goto err_out; | |
547 | } | |
548 | if (irq == 0) { | |
549 | printk (KERN_INFO "cosa IRQ autoprobe: no interrupt obtained (board at 0x%x)\n", | |
550 | cosa->datareg); | |
551 | /* return -1; */ | |
552 | } | |
553 | } | |
554 | ||
555 | cosa->irq = irq; | |
556 | cosa->num = nr_cards; | |
557 | cosa->usage = 0; | |
558 | cosa->nchannels = 2; /* FIXME: how to determine this? */ | |
559 | ||
560 | if (request_irq(cosa->irq, cosa_interrupt, 0, cosa->type, cosa)) { | |
561 | err = -1; | |
562 | goto err_out; | |
563 | } | |
564 | if (request_dma(cosa->dma, cosa->type)) { | |
565 | err = -1; | |
566 | goto err_out1; | |
567 | } | |
568 | ||
569 | cosa->bouncebuf = kmalloc(COSA_MTU, GFP_KERNEL|GFP_DMA); | |
570 | if (!cosa->bouncebuf) { | |
571 | err = -ENOMEM; | |
572 | goto err_out2; | |
573 | } | |
574 | sprintf(cosa->name, "cosa%d", cosa->num); | |
575 | ||
576 | /* Initialize the per-channel data */ | |
dd00cc48 | 577 | cosa->chan = kcalloc(cosa->nchannels, sizeof(struct channel_data), GFP_KERNEL); |
1da177e4 LT |
578 | if (!cosa->chan) { |
579 | err = -ENOMEM; | |
580 | goto err_out3; | |
581 | } | |
1da177e4 LT |
582 | for (i=0; i<cosa->nchannels; i++) { |
583 | cosa->chan[i].cosa = cosa; | |
584 | cosa->chan[i].num = i; | |
585 | channel_init(cosa->chan+i); | |
586 | } | |
587 | ||
588 | printk (KERN_INFO "cosa%d: %s (%s at 0x%x irq %d dma %d), %d channels\n", | |
589 | cosa->num, cosa->id_string, cosa->type, | |
590 | cosa->datareg, cosa->irq, cosa->dma, cosa->nchannels); | |
591 | ||
592 | return nr_cards++; | |
593 | err_out3: | |
594 | kfree(cosa->bouncebuf); | |
595 | err_out2: | |
596 | free_dma(cosa->dma); | |
597 | err_out1: | |
598 | free_irq(cosa->irq, cosa); | |
599 | err_out: | |
600 | release_region(cosa->datareg,is_8bit(cosa)?2:4); | |
601 | printk(KERN_NOTICE "cosa%d: allocating resources failed\n", | |
602 | cosa->num); | |
603 | return err; | |
604 | } | |
605 | ||
606 | \f | |
607 | /*---------- SPPP/HDLC netdevice ---------- */ | |
608 | ||
609 | static void cosa_setup(struct net_device *d) | |
610 | { | |
611 | d->open = cosa_sppp_open; | |
612 | d->stop = cosa_sppp_close; | |
613 | d->hard_start_xmit = cosa_sppp_tx; | |
614 | d->do_ioctl = cosa_sppp_ioctl; | |
615 | d->get_stats = cosa_net_stats; | |
616 | d->tx_timeout = cosa_sppp_timeout; | |
617 | d->watchdog_timeo = TX_TIMEOUT; | |
618 | } | |
619 | ||
620 | static void sppp_channel_init(struct channel_data *chan) | |
621 | { | |
622 | struct net_device *d; | |
623 | chan->if_ptr = &chan->pppdev; | |
624 | d = alloc_netdev(0, chan->name, cosa_setup); | |
625 | if (!d) { | |
626 | printk(KERN_WARNING "%s: alloc_netdev failed.\n", chan->name); | |
627 | return; | |
628 | } | |
629 | chan->pppdev.dev = d; | |
630 | d->base_addr = chan->cosa->datareg; | |
631 | d->irq = chan->cosa->irq; | |
632 | d->dma = chan->cosa->dma; | |
4951704b | 633 | d->ml_priv = chan; |
1da177e4 LT |
634 | sppp_attach(&chan->pppdev); |
635 | if (register_netdev(d)) { | |
636 | printk(KERN_WARNING "%s: register_netdev failed.\n", d->name); | |
637 | sppp_detach(d); | |
638 | free_netdev(d); | |
639 | chan->pppdev.dev = NULL; | |
640 | return; | |
641 | } | |
642 | } | |
643 | ||
644 | static void sppp_channel_delete(struct channel_data *chan) | |
645 | { | |
646 | unregister_netdev(chan->pppdev.dev); | |
647 | sppp_detach(chan->pppdev.dev); | |
648 | free_netdev(chan->pppdev.dev); | |
649 | chan->pppdev.dev = NULL; | |
650 | } | |
651 | ||
652 | static int cosa_sppp_open(struct net_device *d) | |
653 | { | |
4951704b | 654 | struct channel_data *chan = d->ml_priv; |
1da177e4 LT |
655 | int err; |
656 | unsigned long flags; | |
657 | ||
658 | if (!(chan->cosa->firmware_status & COSA_FW_START)) { | |
659 | printk(KERN_NOTICE "%s: start the firmware first (status %d)\n", | |
660 | chan->cosa->name, chan->cosa->firmware_status); | |
661 | return -EPERM; | |
662 | } | |
663 | spin_lock_irqsave(&chan->cosa->lock, flags); | |
664 | if (chan->usage != 0) { | |
665 | printk(KERN_WARNING "%s: sppp_open called with usage count %d\n", | |
666 | chan->name, chan->usage); | |
667 | spin_unlock_irqrestore(&chan->cosa->lock, flags); | |
668 | return -EBUSY; | |
669 | } | |
670 | chan->setup_rx = sppp_setup_rx; | |
671 | chan->tx_done = sppp_tx_done; | |
672 | chan->rx_done = sppp_rx_done; | |
673 | chan->usage=-1; | |
674 | chan->cosa->usage++; | |
675 | spin_unlock_irqrestore(&chan->cosa->lock, flags); | |
676 | ||
677 | err = sppp_open(d); | |
678 | if (err) { | |
679 | spin_lock_irqsave(&chan->cosa->lock, flags); | |
680 | chan->usage=0; | |
681 | chan->cosa->usage--; | |
682 | ||
683 | spin_unlock_irqrestore(&chan->cosa->lock, flags); | |
684 | return err; | |
685 | } | |
686 | ||
687 | netif_start_queue(d); | |
688 | cosa_enable_rx(chan); | |
689 | return 0; | |
690 | } | |
691 | ||
692 | static int cosa_sppp_tx(struct sk_buff *skb, struct net_device *dev) | |
693 | { | |
4951704b | 694 | struct channel_data *chan = dev->ml_priv; |
1da177e4 LT |
695 | |
696 | netif_stop_queue(dev); | |
697 | ||
698 | chan->tx_skb = skb; | |
699 | cosa_start_tx(chan, skb->data, skb->len); | |
700 | return 0; | |
701 | } | |
702 | ||
703 | static void cosa_sppp_timeout(struct net_device *dev) | |
704 | { | |
4951704b | 705 | struct channel_data *chan = dev->ml_priv; |
1da177e4 LT |
706 | |
707 | if (test_bit(RXBIT, &chan->cosa->rxtx)) { | |
708 | chan->stats.rx_errors++; | |
709 | chan->stats.rx_missed_errors++; | |
710 | } else { | |
711 | chan->stats.tx_errors++; | |
712 | chan->stats.tx_aborted_errors++; | |
713 | } | |
714 | cosa_kick(chan->cosa); | |
715 | if (chan->tx_skb) { | |
716 | dev_kfree_skb(chan->tx_skb); | |
717 | chan->tx_skb = NULL; | |
718 | } | |
719 | netif_wake_queue(dev); | |
720 | } | |
721 | ||
722 | static int cosa_sppp_close(struct net_device *d) | |
723 | { | |
4951704b | 724 | struct channel_data *chan = d->ml_priv; |
1da177e4 LT |
725 | unsigned long flags; |
726 | ||
727 | netif_stop_queue(d); | |
728 | sppp_close(d); | |
729 | cosa_disable_rx(chan); | |
730 | spin_lock_irqsave(&chan->cosa->lock, flags); | |
731 | if (chan->rx_skb) { | |
732 | kfree_skb(chan->rx_skb); | |
733 | chan->rx_skb = NULL; | |
734 | } | |
735 | if (chan->tx_skb) { | |
736 | kfree_skb(chan->tx_skb); | |
737 | chan->tx_skb = NULL; | |
738 | } | |
739 | chan->usage=0; | |
740 | chan->cosa->usage--; | |
741 | spin_unlock_irqrestore(&chan->cosa->lock, flags); | |
742 | return 0; | |
743 | } | |
744 | ||
745 | static char *sppp_setup_rx(struct channel_data *chan, int size) | |
746 | { | |
747 | /* | |
748 | * We can safely fall back to non-dma-able memory, because we have | |
749 | * the cosa->bouncebuf pre-allocated. | |
750 | */ | |
751 | if (chan->rx_skb) | |
752 | kfree_skb(chan->rx_skb); | |
753 | chan->rx_skb = dev_alloc_skb(size); | |
754 | if (chan->rx_skb == NULL) { | |
755 | printk(KERN_NOTICE "%s: Memory squeeze, dropping packet\n", | |
756 | chan->name); | |
757 | chan->stats.rx_dropped++; | |
758 | return NULL; | |
759 | } | |
760 | chan->pppdev.dev->trans_start = jiffies; | |
761 | return skb_put(chan->rx_skb, size); | |
762 | } | |
763 | ||
764 | static int sppp_rx_done(struct channel_data *chan) | |
765 | { | |
766 | if (!chan->rx_skb) { | |
767 | printk(KERN_WARNING "%s: rx_done with empty skb!\n", | |
768 | chan->name); | |
769 | chan->stats.rx_errors++; | |
770 | chan->stats.rx_frame_errors++; | |
771 | return 0; | |
772 | } | |
773 | chan->rx_skb->protocol = htons(ETH_P_WAN_PPP); | |
774 | chan->rx_skb->dev = chan->pppdev.dev; | |
2f7826c0 | 775 | skb_reset_mac_header(chan->rx_skb); |
1da177e4 LT |
776 | chan->stats.rx_packets++; |
777 | chan->stats.rx_bytes += chan->cosa->rxsize; | |
778 | netif_rx(chan->rx_skb); | |
779 | chan->rx_skb = NULL; | |
780 | chan->pppdev.dev->last_rx = jiffies; | |
781 | return 0; | |
782 | } | |
783 | ||
784 | /* ARGSUSED */ | |
785 | static int sppp_tx_done(struct channel_data *chan, int size) | |
786 | { | |
787 | if (!chan->tx_skb) { | |
788 | printk(KERN_WARNING "%s: tx_done with empty skb!\n", | |
789 | chan->name); | |
790 | chan->stats.tx_errors++; | |
791 | chan->stats.tx_aborted_errors++; | |
792 | return 1; | |
793 | } | |
794 | dev_kfree_skb_irq(chan->tx_skb); | |
795 | chan->tx_skb = NULL; | |
796 | chan->stats.tx_packets++; | |
797 | chan->stats.tx_bytes += size; | |
798 | netif_wake_queue(chan->pppdev.dev); | |
799 | return 1; | |
800 | } | |
801 | ||
802 | static struct net_device_stats *cosa_net_stats(struct net_device *dev) | |
803 | { | |
4951704b | 804 | struct channel_data *chan = dev->ml_priv; |
1da177e4 LT |
805 | return &chan->stats; |
806 | } | |
807 | ||
808 | \f | |
809 | /*---------- Character device ---------- */ | |
810 | ||
811 | static void chardev_channel_init(struct channel_data *chan) | |
812 | { | |
6387c4be | 813 | mutex_init(&chan->rlock); |
1da177e4 LT |
814 | init_MUTEX(&chan->wsem); |
815 | } | |
816 | ||
817 | static ssize_t cosa_read(struct file *file, | |
818 | char __user *buf, size_t count, loff_t *ppos) | |
819 | { | |
820 | DECLARE_WAITQUEUE(wait, current); | |
821 | unsigned long flags; | |
822 | struct channel_data *chan = file->private_data; | |
823 | struct cosa_data *cosa = chan->cosa; | |
824 | char *kbuf; | |
825 | ||
826 | if (!(cosa->firmware_status & COSA_FW_START)) { | |
827 | printk(KERN_NOTICE "%s: start the firmware first (status %d)\n", | |
828 | cosa->name, cosa->firmware_status); | |
829 | return -EPERM; | |
830 | } | |
6387c4be | 831 | if (mutex_lock_interruptible(&chan->rlock)) |
1da177e4 LT |
832 | return -ERESTARTSYS; |
833 | ||
834 | if ((chan->rxdata = kmalloc(COSA_MTU, GFP_DMA|GFP_KERNEL)) == NULL) { | |
835 | printk(KERN_INFO "%s: cosa_read() - OOM\n", cosa->name); | |
6387c4be | 836 | mutex_unlock(&chan->rlock); |
1da177e4 LT |
837 | return -ENOMEM; |
838 | } | |
839 | ||
840 | chan->rx_status = 0; | |
841 | cosa_enable_rx(chan); | |
842 | spin_lock_irqsave(&cosa->lock, flags); | |
843 | add_wait_queue(&chan->rxwaitq, &wait); | |
844 | while(!chan->rx_status) { | |
845 | current->state = TASK_INTERRUPTIBLE; | |
846 | spin_unlock_irqrestore(&cosa->lock, flags); | |
847 | schedule(); | |
848 | spin_lock_irqsave(&cosa->lock, flags); | |
849 | if (signal_pending(current) && chan->rx_status == 0) { | |
850 | chan->rx_status = 1; | |
851 | remove_wait_queue(&chan->rxwaitq, &wait); | |
852 | current->state = TASK_RUNNING; | |
853 | spin_unlock_irqrestore(&cosa->lock, flags); | |
6387c4be | 854 | mutex_unlock(&chan->rlock); |
1da177e4 LT |
855 | return -ERESTARTSYS; |
856 | } | |
857 | } | |
858 | remove_wait_queue(&chan->rxwaitq, &wait); | |
859 | current->state = TASK_RUNNING; | |
860 | kbuf = chan->rxdata; | |
861 | count = chan->rxsize; | |
862 | spin_unlock_irqrestore(&cosa->lock, flags); | |
6387c4be | 863 | mutex_unlock(&chan->rlock); |
1da177e4 LT |
864 | |
865 | if (copy_to_user(buf, kbuf, count)) { | |
866 | kfree(kbuf); | |
867 | return -EFAULT; | |
868 | } | |
869 | kfree(kbuf); | |
870 | return count; | |
871 | } | |
872 | ||
873 | static char *chrdev_setup_rx(struct channel_data *chan, int size) | |
874 | { | |
875 | /* Expect size <= COSA_MTU */ | |
876 | chan->rxsize = size; | |
877 | return chan->rxdata; | |
878 | } | |
879 | ||
880 | static int chrdev_rx_done(struct channel_data *chan) | |
881 | { | |
882 | if (chan->rx_status) { /* Reader has died */ | |
883 | kfree(chan->rxdata); | |
884 | up(&chan->wsem); | |
885 | } | |
886 | chan->rx_status = 1; | |
887 | wake_up_interruptible(&chan->rxwaitq); | |
888 | return 1; | |
889 | } | |
890 | ||
891 | ||
892 | static ssize_t cosa_write(struct file *file, | |
893 | const char __user *buf, size_t count, loff_t *ppos) | |
894 | { | |
895 | DECLARE_WAITQUEUE(wait, current); | |
896 | struct channel_data *chan = file->private_data; | |
897 | struct cosa_data *cosa = chan->cosa; | |
898 | unsigned long flags; | |
899 | char *kbuf; | |
900 | ||
901 | if (!(cosa->firmware_status & COSA_FW_START)) { | |
902 | printk(KERN_NOTICE "%s: start the firmware first (status %d)\n", | |
903 | cosa->name, cosa->firmware_status); | |
904 | return -EPERM; | |
905 | } | |
906 | if (down_interruptible(&chan->wsem)) | |
907 | return -ERESTARTSYS; | |
908 | ||
909 | if (count > COSA_MTU) | |
910 | count = COSA_MTU; | |
911 | ||
912 | /* Allocate the buffer */ | |
913 | if ((kbuf = kmalloc(count, GFP_KERNEL|GFP_DMA)) == NULL) { | |
914 | printk(KERN_NOTICE "%s: cosa_write() OOM - dropping packet\n", | |
915 | cosa->name); | |
916 | up(&chan->wsem); | |
917 | return -ENOMEM; | |
918 | } | |
919 | if (copy_from_user(kbuf, buf, count)) { | |
920 | up(&chan->wsem); | |
921 | kfree(kbuf); | |
922 | return -EFAULT; | |
923 | } | |
924 | chan->tx_status=0; | |
925 | cosa_start_tx(chan, kbuf, count); | |
926 | ||
927 | spin_lock_irqsave(&cosa->lock, flags); | |
928 | add_wait_queue(&chan->txwaitq, &wait); | |
929 | while(!chan->tx_status) { | |
930 | current->state = TASK_INTERRUPTIBLE; | |
931 | spin_unlock_irqrestore(&cosa->lock, flags); | |
932 | schedule(); | |
933 | spin_lock_irqsave(&cosa->lock, flags); | |
934 | if (signal_pending(current) && chan->tx_status == 0) { | |
935 | chan->tx_status = 1; | |
936 | remove_wait_queue(&chan->txwaitq, &wait); | |
937 | current->state = TASK_RUNNING; | |
938 | chan->tx_status = 1; | |
939 | spin_unlock_irqrestore(&cosa->lock, flags); | |
940 | return -ERESTARTSYS; | |
941 | } | |
942 | } | |
943 | remove_wait_queue(&chan->txwaitq, &wait); | |
944 | current->state = TASK_RUNNING; | |
945 | up(&chan->wsem); | |
946 | spin_unlock_irqrestore(&cosa->lock, flags); | |
947 | kfree(kbuf); | |
948 | return count; | |
949 | } | |
950 | ||
951 | static int chrdev_tx_done(struct channel_data *chan, int size) | |
952 | { | |
953 | if (chan->tx_status) { /* Writer was interrupted */ | |
954 | kfree(chan->txbuf); | |
955 | up(&chan->wsem); | |
956 | } | |
957 | chan->tx_status = 1; | |
958 | wake_up_interruptible(&chan->txwaitq); | |
959 | return 1; | |
960 | } | |
961 | ||
962 | static unsigned int cosa_poll(struct file *file, poll_table *poll) | |
963 | { | |
964 | printk(KERN_INFO "cosa_poll is here\n"); | |
965 | return 0; | |
966 | } | |
967 | ||
968 | static int cosa_open(struct inode *inode, struct file *file) | |
969 | { | |
970 | struct cosa_data *cosa; | |
971 | struct channel_data *chan; | |
972 | unsigned long flags; | |
973 | int n; | |
09118107 | 974 | int ret = 0; |
1da177e4 | 975 | |
09118107 | 976 | lock_kernel(); |
f04538c3 | 977 | if ((n=iminor(file->f_path.dentry->d_inode)>>CARD_MINOR_BITS) |
09118107 JC |
978 | >= nr_cards) { |
979 | ret = -ENODEV; | |
980 | goto out; | |
981 | } | |
1da177e4 LT |
982 | cosa = cosa_cards+n; |
983 | ||
f04538c3 | 984 | if ((n=iminor(file->f_path.dentry->d_inode) |
09118107 JC |
985 | & ((1<<CARD_MINOR_BITS)-1)) >= cosa->nchannels) { |
986 | ret = -ENODEV; | |
987 | goto out; | |
988 | } | |
1da177e4 LT |
989 | chan = cosa->chan + n; |
990 | ||
991 | file->private_data = chan; | |
992 | ||
993 | spin_lock_irqsave(&cosa->lock, flags); | |
994 | ||
995 | if (chan->usage < 0) { /* in netdev mode */ | |
996 | spin_unlock_irqrestore(&cosa->lock, flags); | |
09118107 JC |
997 | ret = -EBUSY; |
998 | goto out; | |
1da177e4 LT |
999 | } |
1000 | cosa->usage++; | |
1001 | chan->usage++; | |
1002 | ||
1003 | chan->tx_done = chrdev_tx_done; | |
1004 | chan->setup_rx = chrdev_setup_rx; | |
1005 | chan->rx_done = chrdev_rx_done; | |
1006 | spin_unlock_irqrestore(&cosa->lock, flags); | |
09118107 JC |
1007 | out: |
1008 | unlock_kernel(); | |
1009 | return ret; | |
1da177e4 LT |
1010 | } |
1011 | ||
1012 | static int cosa_release(struct inode *inode, struct file *file) | |
1013 | { | |
1014 | struct channel_data *channel = file->private_data; | |
1015 | struct cosa_data *cosa; | |
1016 | unsigned long flags; | |
1017 | ||
1018 | cosa = channel->cosa; | |
1019 | spin_lock_irqsave(&cosa->lock, flags); | |
1020 | cosa->usage--; | |
1021 | channel->usage--; | |
1022 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1023 | return 0; | |
1024 | } | |
1025 | ||
1026 | #ifdef COSA_FASYNC_WORKING | |
1027 | static struct fasync_struct *fasync[256] = { NULL, }; | |
1028 | ||
1029 | /* To be done ... */ | |
1030 | static int cosa_fasync(struct inode *inode, struct file *file, int on) | |
1031 | { | |
1032 | int port = iminor(inode); | |
1033 | int rv = fasync_helper(inode, file, on, &fasync[port]); | |
1034 | return rv < 0 ? rv : 0; | |
1035 | } | |
1036 | #endif | |
1037 | ||
1038 | \f | |
1039 | /* ---------- Ioctls ---------- */ | |
1040 | ||
1041 | /* | |
1042 | * Ioctl subroutines can safely be made inline, because they are called | |
1043 | * only from cosa_ioctl(). | |
1044 | */ | |
1045 | static inline int cosa_reset(struct cosa_data *cosa) | |
1046 | { | |
1047 | char idstring[COSA_MAX_ID_STRING]; | |
1048 | if (cosa->usage > 1) | |
1049 | printk(KERN_INFO "cosa%d: WARNING: reset requested with cosa->usage > 1 (%d). Odd things may happen.\n", | |
1050 | cosa->num, cosa->usage); | |
1051 | cosa->firmware_status &= ~(COSA_FW_RESET|COSA_FW_START); | |
1052 | if (cosa_reset_and_read_id(cosa, idstring) < 0) { | |
1053 | printk(KERN_NOTICE "cosa%d: reset failed\n", cosa->num); | |
1054 | return -EIO; | |
1055 | } | |
1056 | printk(KERN_INFO "cosa%d: resetting device: %s\n", cosa->num, | |
1057 | idstring); | |
1058 | cosa->firmware_status |= COSA_FW_RESET; | |
1059 | return 0; | |
1060 | } | |
1061 | ||
1062 | /* High-level function to download data into COSA memory. Calls download() */ | |
1063 | static inline int cosa_download(struct cosa_data *cosa, void __user *arg) | |
1064 | { | |
1065 | struct cosa_download d; | |
1066 | int i; | |
1067 | ||
1068 | if (cosa->usage > 1) | |
1069 | printk(KERN_INFO "%s: WARNING: download of microcode requested with cosa->usage > 1 (%d). Odd things may happen.\n", | |
1070 | cosa->name, cosa->usage); | |
1071 | if (!(cosa->firmware_status & COSA_FW_RESET)) { | |
1072 | printk(KERN_NOTICE "%s: reset the card first (status %d).\n", | |
1073 | cosa->name, cosa->firmware_status); | |
1074 | return -EPERM; | |
1075 | } | |
1076 | ||
1077 | if (copy_from_user(&d, arg, sizeof(d))) | |
1078 | return -EFAULT; | |
1079 | ||
1080 | if (d.addr < 0 || d.addr > COSA_MAX_FIRMWARE_SIZE) | |
1081 | return -EINVAL; | |
1082 | if (d.len < 0 || d.len > COSA_MAX_FIRMWARE_SIZE) | |
1083 | return -EINVAL; | |
1084 | ||
1085 | ||
1086 | /* If something fails, force the user to reset the card */ | |
1087 | cosa->firmware_status &= ~(COSA_FW_RESET|COSA_FW_DOWNLOAD); | |
1088 | ||
1089 | i = download(cosa, d.code, d.len, d.addr); | |
1090 | if (i < 0) { | |
1091 | printk(KERN_NOTICE "cosa%d: microcode download failed: %d\n", | |
1092 | cosa->num, i); | |
1093 | return -EIO; | |
1094 | } | |
1095 | printk(KERN_INFO "cosa%d: downloading microcode - 0x%04x bytes at 0x%04x\n", | |
1096 | cosa->num, d.len, d.addr); | |
1097 | cosa->firmware_status |= COSA_FW_RESET|COSA_FW_DOWNLOAD; | |
1098 | return 0; | |
1099 | } | |
1100 | ||
1101 | /* High-level function to read COSA memory. Calls readmem() */ | |
1102 | static inline int cosa_readmem(struct cosa_data *cosa, void __user *arg) | |
1103 | { | |
1104 | struct cosa_download d; | |
1105 | int i; | |
1106 | ||
1107 | if (cosa->usage > 1) | |
1108 | printk(KERN_INFO "cosa%d: WARNING: readmem requested with " | |
1109 | "cosa->usage > 1 (%d). Odd things may happen.\n", | |
1110 | cosa->num, cosa->usage); | |
1111 | if (!(cosa->firmware_status & COSA_FW_RESET)) { | |
1112 | printk(KERN_NOTICE "%s: reset the card first (status %d).\n", | |
1113 | cosa->name, cosa->firmware_status); | |
1114 | return -EPERM; | |
1115 | } | |
1116 | ||
1117 | if (copy_from_user(&d, arg, sizeof(d))) | |
1118 | return -EFAULT; | |
1119 | ||
1120 | /* If something fails, force the user to reset the card */ | |
1121 | cosa->firmware_status &= ~COSA_FW_RESET; | |
1122 | ||
1123 | i = readmem(cosa, d.code, d.len, d.addr); | |
1124 | if (i < 0) { | |
1125 | printk(KERN_NOTICE "cosa%d: reading memory failed: %d\n", | |
1126 | cosa->num, i); | |
1127 | return -EIO; | |
1128 | } | |
1129 | printk(KERN_INFO "cosa%d: reading card memory - 0x%04x bytes at 0x%04x\n", | |
1130 | cosa->num, d.len, d.addr); | |
1131 | cosa->firmware_status |= COSA_FW_RESET; | |
1132 | return 0; | |
1133 | } | |
1134 | ||
1135 | /* High-level function to start microcode. Calls startmicrocode(). */ | |
1136 | static inline int cosa_start(struct cosa_data *cosa, int address) | |
1137 | { | |
1138 | int i; | |
1139 | ||
1140 | if (cosa->usage > 1) | |
1141 | printk(KERN_INFO "cosa%d: WARNING: start microcode requested with cosa->usage > 1 (%d). Odd things may happen.\n", | |
1142 | cosa->num, cosa->usage); | |
1143 | ||
1144 | if ((cosa->firmware_status & (COSA_FW_RESET|COSA_FW_DOWNLOAD)) | |
1145 | != (COSA_FW_RESET|COSA_FW_DOWNLOAD)) { | |
1146 | printk(KERN_NOTICE "%s: download the microcode and/or reset the card first (status %d).\n", | |
1147 | cosa->name, cosa->firmware_status); | |
1148 | return -EPERM; | |
1149 | } | |
1150 | cosa->firmware_status &= ~COSA_FW_RESET; | |
1151 | if ((i=startmicrocode(cosa, address)) < 0) { | |
1152 | printk(KERN_NOTICE "cosa%d: start microcode at 0x%04x failed: %d\n", | |
1153 | cosa->num, address, i); | |
1154 | return -EIO; | |
1155 | } | |
1156 | printk(KERN_INFO "cosa%d: starting microcode at 0x%04x\n", | |
1157 | cosa->num, address); | |
1158 | cosa->startaddr = address; | |
1159 | cosa->firmware_status |= COSA_FW_START; | |
1160 | return 0; | |
1161 | } | |
1162 | ||
1163 | /* Buffer of size at least COSA_MAX_ID_STRING is expected */ | |
1164 | static inline int cosa_getidstr(struct cosa_data *cosa, char __user *string) | |
1165 | { | |
1166 | int l = strlen(cosa->id_string)+1; | |
1167 | if (copy_to_user(string, cosa->id_string, l)) | |
1168 | return -EFAULT; | |
1169 | return l; | |
1170 | } | |
1171 | ||
1172 | /* Buffer of size at least COSA_MAX_ID_STRING is expected */ | |
1173 | static inline int cosa_gettype(struct cosa_data *cosa, char __user *string) | |
1174 | { | |
1175 | int l = strlen(cosa->type)+1; | |
1176 | if (copy_to_user(string, cosa->type, l)) | |
1177 | return -EFAULT; | |
1178 | return l; | |
1179 | } | |
1180 | ||
1181 | static int cosa_ioctl_common(struct cosa_data *cosa, | |
1182 | struct channel_data *channel, unsigned int cmd, unsigned long arg) | |
1183 | { | |
1184 | void __user *argp = (void __user *)arg; | |
1185 | switch(cmd) { | |
1186 | case COSAIORSET: /* Reset the device */ | |
1187 | if (!capable(CAP_NET_ADMIN)) | |
1188 | return -EACCES; | |
1189 | return cosa_reset(cosa); | |
1190 | case COSAIOSTRT: /* Start the firmware */ | |
1191 | if (!capable(CAP_SYS_RAWIO)) | |
1192 | return -EACCES; | |
1193 | return cosa_start(cosa, arg); | |
1194 | case COSAIODOWNLD: /* Download the firmware */ | |
1195 | if (!capable(CAP_SYS_RAWIO)) | |
1196 | return -EACCES; | |
1197 | ||
1198 | return cosa_download(cosa, argp); | |
1199 | case COSAIORMEM: | |
1200 | if (!capable(CAP_SYS_RAWIO)) | |
1201 | return -EACCES; | |
1202 | return cosa_readmem(cosa, argp); | |
1203 | case COSAIORTYPE: | |
1204 | return cosa_gettype(cosa, argp); | |
1205 | case COSAIORIDSTR: | |
1206 | return cosa_getidstr(cosa, argp); | |
1207 | case COSAIONRCARDS: | |
1208 | return nr_cards; | |
1209 | case COSAIONRCHANS: | |
1210 | return cosa->nchannels; | |
1211 | case COSAIOBMSET: | |
1212 | if (!capable(CAP_SYS_RAWIO)) | |
1213 | return -EACCES; | |
1214 | if (is_8bit(cosa)) | |
1215 | return -EINVAL; | |
1216 | if (arg != COSA_BM_OFF && arg != COSA_BM_ON) | |
1217 | return -EINVAL; | |
1218 | cosa->busmaster = arg; | |
1219 | return 0; | |
1220 | case COSAIOBMGET: | |
1221 | return cosa->busmaster; | |
1222 | } | |
1223 | return -ENOIOCTLCMD; | |
1224 | } | |
1225 | ||
1226 | static int cosa_sppp_ioctl(struct net_device *dev, struct ifreq *ifr, | |
1227 | int cmd) | |
1228 | { | |
1229 | int rv; | |
4951704b | 1230 | struct channel_data *chan = dev->ml_priv; |
1da177e4 LT |
1231 | rv = cosa_ioctl_common(chan->cosa, chan, cmd, (unsigned long)ifr->ifr_data); |
1232 | if (rv == -ENOIOCTLCMD) { | |
1233 | return sppp_do_ioctl(dev, ifr, cmd); | |
1234 | } | |
1235 | return rv; | |
1236 | } | |
1237 | ||
1238 | static int cosa_chardev_ioctl(struct inode *inode, struct file *file, | |
1239 | unsigned int cmd, unsigned long arg) | |
1240 | { | |
1241 | struct channel_data *channel = file->private_data; | |
1242 | struct cosa_data *cosa = channel->cosa; | |
1243 | return cosa_ioctl_common(cosa, channel, cmd, arg); | |
1244 | } | |
1245 | ||
1246 | \f | |
1247 | /*---------- HW layer interface ---------- */ | |
1248 | ||
1249 | /* | |
1250 | * The higher layer can bind itself to the HW layer by setting the callbacks | |
1251 | * in the channel_data structure and by using these routines. | |
1252 | */ | |
1253 | static void cosa_enable_rx(struct channel_data *chan) | |
1254 | { | |
1255 | struct cosa_data *cosa = chan->cosa; | |
1256 | ||
1257 | if (!test_and_set_bit(chan->num, &cosa->rxbitmap)) | |
1258 | put_driver_status(cosa); | |
1259 | } | |
1260 | ||
1261 | static void cosa_disable_rx(struct channel_data *chan) | |
1262 | { | |
1263 | struct cosa_data *cosa = chan->cosa; | |
1264 | ||
1265 | if (test_and_clear_bit(chan->num, &cosa->rxbitmap)) | |
1266 | put_driver_status(cosa); | |
1267 | } | |
1268 | ||
1269 | /* | |
1270 | * FIXME: This routine probably should check for cosa_start_tx() called when | |
1271 | * the previous transmit is still unfinished. In this case the non-zero | |
1272 | * return value should indicate to the caller that the queuing(sp?) up | |
1273 | * the transmit has failed. | |
1274 | */ | |
1275 | static int cosa_start_tx(struct channel_data *chan, char *buf, int len) | |
1276 | { | |
1277 | struct cosa_data *cosa = chan->cosa; | |
1278 | unsigned long flags; | |
1279 | #ifdef DEBUG_DATA | |
1280 | int i; | |
1281 | ||
1282 | printk(KERN_INFO "cosa%dc%d: starting tx(0x%x)", chan->cosa->num, | |
1283 | chan->num, len); | |
1284 | for (i=0; i<len; i++) | |
1285 | printk(" %02x", buf[i]&0xff); | |
1286 | printk("\n"); | |
1287 | #endif | |
1288 | spin_lock_irqsave(&cosa->lock, flags); | |
1289 | chan->txbuf = buf; | |
1290 | chan->txsize = len; | |
1291 | if (len > COSA_MTU) | |
1292 | chan->txsize = COSA_MTU; | |
1293 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1294 | ||
1295 | /* Tell the firmware we are ready */ | |
1296 | set_bit(chan->num, &cosa->txbitmap); | |
1297 | put_driver_status(cosa); | |
1298 | ||
1299 | return 0; | |
1300 | } | |
1301 | ||
1302 | static void put_driver_status(struct cosa_data *cosa) | |
1303 | { | |
1304 | unsigned long flags; | |
1305 | int status; | |
1306 | ||
1307 | spin_lock_irqsave(&cosa->lock, flags); | |
1308 | ||
1309 | status = (cosa->rxbitmap ? DRIVER_RX_READY : 0) | |
1310 | | (cosa->txbitmap ? DRIVER_TX_READY : 0) | |
1311 | | (cosa->txbitmap? ~(cosa->txbitmap<<DRIVER_TXMAP_SHIFT) | |
1312 | &DRIVER_TXMAP_MASK : 0); | |
1313 | if (!cosa->rxtx) { | |
1314 | if (cosa->rxbitmap|cosa->txbitmap) { | |
1315 | if (!cosa->enabled) { | |
1316 | cosa_putstatus(cosa, SR_RX_INT_ENA); | |
1317 | #ifdef DEBUG_IO | |
1318 | debug_status_out(cosa, SR_RX_INT_ENA); | |
1319 | #endif | |
1320 | cosa->enabled = 1; | |
1321 | } | |
1322 | } else if (cosa->enabled) { | |
1323 | cosa->enabled = 0; | |
1324 | cosa_putstatus(cosa, 0); | |
1325 | #ifdef DEBUG_IO | |
1326 | debug_status_out(cosa, 0); | |
1327 | #endif | |
1328 | } | |
1329 | cosa_putdata8(cosa, status); | |
1330 | #ifdef DEBUG_IO | |
1331 | debug_data_cmd(cosa, status); | |
1332 | #endif | |
1333 | } | |
1334 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1335 | } | |
1336 | ||
1337 | static void put_driver_status_nolock(struct cosa_data *cosa) | |
1338 | { | |
1339 | int status; | |
1340 | ||
1341 | status = (cosa->rxbitmap ? DRIVER_RX_READY : 0) | |
1342 | | (cosa->txbitmap ? DRIVER_TX_READY : 0) | |
1343 | | (cosa->txbitmap? ~(cosa->txbitmap<<DRIVER_TXMAP_SHIFT) | |
1344 | &DRIVER_TXMAP_MASK : 0); | |
1345 | ||
1346 | if (cosa->rxbitmap|cosa->txbitmap) { | |
1347 | cosa_putstatus(cosa, SR_RX_INT_ENA); | |
1348 | #ifdef DEBUG_IO | |
1349 | debug_status_out(cosa, SR_RX_INT_ENA); | |
1350 | #endif | |
1351 | cosa->enabled = 1; | |
1352 | } else { | |
1353 | cosa_putstatus(cosa, 0); | |
1354 | #ifdef DEBUG_IO | |
1355 | debug_status_out(cosa, 0); | |
1356 | #endif | |
1357 | cosa->enabled = 0; | |
1358 | } | |
1359 | cosa_putdata8(cosa, status); | |
1360 | #ifdef DEBUG_IO | |
1361 | debug_data_cmd(cosa, status); | |
1362 | #endif | |
1363 | } | |
1364 | ||
1365 | /* | |
1366 | * The "kickme" function: When the DMA times out, this is called to | |
1367 | * clean up the driver status. | |
1368 | * FIXME: Preliminary support, the interface is probably wrong. | |
1369 | */ | |
1370 | static void cosa_kick(struct cosa_data *cosa) | |
1371 | { | |
1372 | unsigned long flags, flags1; | |
1373 | char *s = "(probably) IRQ"; | |
1374 | ||
1375 | if (test_bit(RXBIT, &cosa->rxtx)) | |
1376 | s = "RX DMA"; | |
1377 | if (test_bit(TXBIT, &cosa->rxtx)) | |
1378 | s = "TX DMA"; | |
1379 | ||
1380 | printk(KERN_INFO "%s: %s timeout - restarting.\n", cosa->name, s); | |
1381 | spin_lock_irqsave(&cosa->lock, flags); | |
1382 | cosa->rxtx = 0; | |
1383 | ||
1384 | flags1 = claim_dma_lock(); | |
1385 | disable_dma(cosa->dma); | |
1386 | clear_dma_ff(cosa->dma); | |
1387 | release_dma_lock(flags1); | |
1388 | ||
1389 | /* FIXME: Anything else? */ | |
1390 | udelay(100); | |
1391 | cosa_putstatus(cosa, 0); | |
1392 | udelay(100); | |
1393 | (void) cosa_getdata8(cosa); | |
1394 | udelay(100); | |
1395 | cosa_putdata8(cosa, 0); | |
1396 | udelay(100); | |
1397 | put_driver_status_nolock(cosa); | |
1398 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1399 | } | |
1400 | ||
1401 | /* | |
1402 | * Check if the whole buffer is DMA-able. It means it is below the 16M of | |
1403 | * physical memory and doesn't span the 64k boundary. For now it seems | |
1404 | * SKB's never do this, but we'll check this anyway. | |
1405 | */ | |
1406 | static int cosa_dma_able(struct channel_data *chan, char *buf, int len) | |
1407 | { | |
1408 | static int count; | |
1409 | unsigned long b = (unsigned long)buf; | |
1410 | if (b+len >= MAX_DMA_ADDRESS) | |
1411 | return 0; | |
1412 | if ((b^ (b+len)) & 0x10000) { | |
1413 | if (count++ < 5) | |
1414 | printk(KERN_INFO "%s: packet spanning a 64k boundary\n", | |
1415 | chan->name); | |
1416 | return 0; | |
1417 | } | |
1418 | return 1; | |
1419 | } | |
1420 | ||
1421 | \f | |
1422 | /* ---------- The SRP/COSA ROM monitor functions ---------- */ | |
1423 | ||
1424 | /* | |
1425 | * Downloading SRP microcode: say "w" to SRP monitor, it answers by "w=", | |
1426 | * drivers need to say 4-digit hex number meaning start address of the microcode | |
1427 | * separated by a single space. Monitor replies by saying " =". Now driver | |
1428 | * has to write 4-digit hex number meaning the last byte address ended | |
1429 | * by a single space. Monitor has to reply with a space. Now the download | |
1430 | * begins. After the download monitor replies with "\r\n." (CR LF dot). | |
1431 | */ | |
1432 | static int download(struct cosa_data *cosa, const char __user *microcode, int length, int address) | |
1433 | { | |
1434 | int i; | |
1435 | ||
1436 | if (put_wait_data(cosa, 'w') == -1) return -1; | |
1437 | if ((i=get_wait_data(cosa)) != 'w') { printk("dnld: 0x%04x\n",i); return -2;} | |
1438 | if (get_wait_data(cosa) != '=') return -3; | |
1439 | ||
1440 | if (puthexnumber(cosa, address) < 0) return -4; | |
1441 | if (put_wait_data(cosa, ' ') == -1) return -10; | |
1442 | if (get_wait_data(cosa) != ' ') return -11; | |
1443 | if (get_wait_data(cosa) != '=') return -12; | |
1444 | ||
1445 | if (puthexnumber(cosa, address+length-1) < 0) return -13; | |
1446 | if (put_wait_data(cosa, ' ') == -1) return -18; | |
1447 | if (get_wait_data(cosa) != ' ') return -19; | |
1448 | ||
1449 | while (length--) { | |
1450 | char c; | |
1451 | #ifndef SRP_DOWNLOAD_AT_BOOT | |
1452 | if (get_user(c, microcode)) | |
1453 | return -23; /* ??? */ | |
1454 | #else | |
1455 | c = *microcode; | |
1456 | #endif | |
1457 | if (put_wait_data(cosa, c) == -1) | |
1458 | return -20; | |
1459 | microcode++; | |
1460 | } | |
1461 | ||
1462 | if (get_wait_data(cosa) != '\r') return -21; | |
1463 | if (get_wait_data(cosa) != '\n') return -22; | |
1464 | if (get_wait_data(cosa) != '.') return -23; | |
1465 | #if 0 | |
1466 | printk(KERN_DEBUG "cosa%d: download completed.\n", cosa->num); | |
1467 | #endif | |
1468 | return 0; | |
1469 | } | |
1470 | ||
1471 | ||
1472 | /* | |
1473 | * Starting microcode is done via the "g" command of the SRP monitor. | |
1474 | * The chat should be the following: "g" "g=" "<addr><CR>" | |
1475 | * "<CR><CR><LF><CR><LF>". | |
1476 | */ | |
1477 | static int startmicrocode(struct cosa_data *cosa, int address) | |
1478 | { | |
1479 | if (put_wait_data(cosa, 'g') == -1) return -1; | |
1480 | if (get_wait_data(cosa) != 'g') return -2; | |
1481 | if (get_wait_data(cosa) != '=') return -3; | |
1482 | ||
1483 | if (puthexnumber(cosa, address) < 0) return -4; | |
1484 | if (put_wait_data(cosa, '\r') == -1) return -5; | |
1485 | ||
1486 | if (get_wait_data(cosa) != '\r') return -6; | |
1487 | if (get_wait_data(cosa) != '\r') return -7; | |
1488 | if (get_wait_data(cosa) != '\n') return -8; | |
1489 | if (get_wait_data(cosa) != '\r') return -9; | |
1490 | if (get_wait_data(cosa) != '\n') return -10; | |
1491 | #if 0 | |
1492 | printk(KERN_DEBUG "cosa%d: microcode started\n", cosa->num); | |
1493 | #endif | |
1494 | return 0; | |
1495 | } | |
1496 | ||
1497 | /* | |
1498 | * Reading memory is done via the "r" command of the SRP monitor. | |
1499 | * The chat is the following "r" "r=" "<addr> " " =" "<last_byte> " " " | |
1500 | * Then driver can read the data and the conversation is finished | |
1501 | * by SRP monitor sending "<CR><LF>." (dot at the end). | |
1502 | * | |
1503 | * This routine is not needed during the normal operation and serves | |
1504 | * for debugging purposes only. | |
1505 | */ | |
1506 | static int readmem(struct cosa_data *cosa, char __user *microcode, int length, int address) | |
1507 | { | |
1508 | if (put_wait_data(cosa, 'r') == -1) return -1; | |
1509 | if ((get_wait_data(cosa)) != 'r') return -2; | |
1510 | if ((get_wait_data(cosa)) != '=') return -3; | |
1511 | ||
1512 | if (puthexnumber(cosa, address) < 0) return -4; | |
1513 | if (put_wait_data(cosa, ' ') == -1) return -5; | |
1514 | if (get_wait_data(cosa) != ' ') return -6; | |
1515 | if (get_wait_data(cosa) != '=') return -7; | |
1516 | ||
1517 | if (puthexnumber(cosa, address+length-1) < 0) return -8; | |
1518 | if (put_wait_data(cosa, ' ') == -1) return -9; | |
1519 | if (get_wait_data(cosa) != ' ') return -10; | |
1520 | ||
1521 | while (length--) { | |
1522 | char c; | |
1523 | int i; | |
1524 | if ((i=get_wait_data(cosa)) == -1) { | |
1525 | printk (KERN_INFO "cosa: 0x%04x bytes remaining\n", | |
1526 | length); | |
1527 | return -11; | |
1528 | } | |
1529 | c=i; | |
1530 | #if 1 | |
1531 | if (put_user(c, microcode)) | |
1532 | return -23; /* ??? */ | |
1533 | #else | |
1534 | *microcode = c; | |
1535 | #endif | |
1536 | microcode++; | |
1537 | } | |
1538 | ||
1539 | if (get_wait_data(cosa) != '\r') return -21; | |
1540 | if (get_wait_data(cosa) != '\n') return -22; | |
1541 | if (get_wait_data(cosa) != '.') return -23; | |
1542 | #if 0 | |
1543 | printk(KERN_DEBUG "cosa%d: readmem completed.\n", cosa->num); | |
1544 | #endif | |
1545 | return 0; | |
1546 | } | |
1547 | ||
1548 | /* | |
1549 | * This function resets the device and reads the initial prompt | |
1550 | * of the device's ROM monitor. | |
1551 | */ | |
1552 | static int cosa_reset_and_read_id(struct cosa_data *cosa, char *idstring) | |
1553 | { | |
1554 | int i=0, id=0, prev=0, curr=0; | |
1555 | ||
1556 | /* Reset the card ... */ | |
1557 | cosa_putstatus(cosa, 0); | |
1558 | cosa_getdata8(cosa); | |
1559 | cosa_putstatus(cosa, SR_RST); | |
1560 | #ifdef MODULE | |
1561 | msleep(500); | |
1562 | #else | |
1563 | udelay(5*100000); | |
1564 | #endif | |
1565 | /* Disable all IRQs from the card */ | |
1566 | cosa_putstatus(cosa, 0); | |
1567 | ||
1568 | /* | |
1569 | * Try to read the ID string. The card then prints out the | |
1570 | * identification string ended by the "\n\x2e". | |
1571 | * | |
1572 | * The following loop is indexed through i (instead of id) | |
1573 | * to avoid looping forever when for any reason | |
1574 | * the port returns '\r', '\n' or '\x2e' permanently. | |
1575 | */ | |
1576 | for (i=0; i<COSA_MAX_ID_STRING-1; i++, prev=curr) { | |
1577 | if ((curr = get_wait_data(cosa)) == -1) { | |
1578 | return -1; | |
1579 | } | |
1580 | curr &= 0xff; | |
1581 | if (curr != '\r' && curr != '\n' && curr != 0x2e) | |
1582 | idstring[id++] = curr; | |
1583 | if (curr == 0x2e && prev == '\n') | |
1584 | break; | |
1585 | } | |
1586 | /* Perhaps we should fail when i==COSA_MAX_ID_STRING-1 ? */ | |
1587 | idstring[id] = '\0'; | |
1588 | return id; | |
1589 | } | |
1590 | ||
1591 | \f | |
1592 | /* ---------- Auxiliary routines for COSA/SRP monitor ---------- */ | |
1593 | ||
1594 | /* | |
1595 | * This routine gets the data byte from the card waiting for the SR_RX_RDY | |
1596 | * bit to be set in a loop. It should be used in the exceptional cases | |
1597 | * only (for example when resetting the card or downloading the firmware. | |
1598 | */ | |
1599 | static int get_wait_data(struct cosa_data *cosa) | |
1600 | { | |
1601 | int retries = 1000; | |
1602 | ||
1603 | while (--retries) { | |
1604 | /* read data and return them */ | |
1605 | if (cosa_getstatus(cosa) & SR_RX_RDY) { | |
1606 | short r; | |
1607 | r = cosa_getdata8(cosa); | |
1608 | #if 0 | |
1609 | printk(KERN_INFO "cosa: get_wait_data returning after %d retries\n", 999-retries); | |
1610 | #endif | |
1611 | return r; | |
1612 | } | |
1613 | /* sleep if not ready to read */ | |
3173c890 | 1614 | schedule_timeout_interruptible(1); |
1da177e4 LT |
1615 | } |
1616 | printk(KERN_INFO "cosa: timeout in get_wait_data (status 0x%x)\n", | |
1617 | cosa_getstatus(cosa)); | |
1618 | return -1; | |
1619 | } | |
1620 | ||
1621 | /* | |
1622 | * This routine puts the data byte to the card waiting for the SR_TX_RDY | |
1623 | * bit to be set in a loop. It should be used in the exceptional cases | |
1624 | * only (for example when resetting the card or downloading the firmware). | |
1625 | */ | |
1626 | static int put_wait_data(struct cosa_data *cosa, int data) | |
1627 | { | |
1628 | int retries = 1000; | |
1629 | while (--retries) { | |
1630 | /* read data and return them */ | |
1631 | if (cosa_getstatus(cosa) & SR_TX_RDY) { | |
1632 | cosa_putdata8(cosa, data); | |
1633 | #if 0 | |
1634 | printk(KERN_INFO "Putdata: %d retries\n", 999-retries); | |
1635 | #endif | |
1636 | return 0; | |
1637 | } | |
1638 | #if 0 | |
1639 | /* sleep if not ready to read */ | |
3173c890 | 1640 | schedule_timeout_interruptible(1); |
1da177e4 LT |
1641 | #endif |
1642 | } | |
1643 | printk(KERN_INFO "cosa%d: timeout in put_wait_data (status 0x%x)\n", | |
1644 | cosa->num, cosa_getstatus(cosa)); | |
1645 | return -1; | |
1646 | } | |
1647 | ||
1648 | /* | |
1649 | * The following routine puts the hexadecimal number into the SRP monitor | |
1650 | * and verifies the proper echo of the sent bytes. Returns 0 on success, | |
1651 | * negative number on failure (-1,-3,-5,-7) means that put_wait_data() failed, | |
1652 | * (-2,-4,-6,-8) means that reading echo failed. | |
1653 | */ | |
1654 | static int puthexnumber(struct cosa_data *cosa, int number) | |
1655 | { | |
1656 | char temp[5]; | |
1657 | int i; | |
1658 | ||
1659 | /* Well, I should probably replace this by something faster. */ | |
1660 | sprintf(temp, "%04X", number); | |
1661 | for (i=0; i<4; i++) { | |
1662 | if (put_wait_data(cosa, temp[i]) == -1) { | |
1663 | printk(KERN_NOTICE "cosa%d: puthexnumber failed to write byte %d\n", | |
1664 | cosa->num, i); | |
1665 | return -1-2*i; | |
1666 | } | |
1667 | if (get_wait_data(cosa) != temp[i]) { | |
1668 | printk(KERN_NOTICE "cosa%d: puthexhumber failed to read echo of byte %d\n", | |
1669 | cosa->num, i); | |
1670 | return -2-2*i; | |
1671 | } | |
1672 | } | |
1673 | return 0; | |
1674 | } | |
1675 | ||
1676 | \f | |
1677 | /* ---------- Interrupt routines ---------- */ | |
1678 | ||
1679 | /* | |
1680 | * There are three types of interrupt: | |
1681 | * At the beginning of transmit - this handled is in tx_interrupt(), | |
1682 | * at the beginning of receive - it is in rx_interrupt() and | |
1683 | * at the end of transmit/receive - it is the eot_interrupt() function. | |
1684 | * These functions are multiplexed by cosa_interrupt() according to the | |
1685 | * COSA status byte. I have moved the rx/tx/eot interrupt handling into | |
1686 | * separate functions to make it more readable. These functions are inline, | |
1687 | * so there should be no overhead of function call. | |
1688 | * | |
1689 | * In the COSA bus-master mode, we need to tell the card the address of a | |
1690 | * buffer. Unfortunately, COSA may be too slow for us, so we must busy-wait. | |
1691 | * It's time to use the bottom half :-( | |
1692 | */ | |
1693 | ||
1694 | /* | |
1695 | * Transmit interrupt routine - called when COSA is willing to obtain | |
1696 | * data from the OS. The most tricky part of the routine is selection | |
1697 | * of channel we (OS) want to send packet for. For SRP we should probably | |
1698 | * use the round-robin approach. The newer COSA firmwares have a simple | |
1699 | * flow-control - in the status word has bits 2 and 3 set to 1 means that the | |
1700 | * channel 0 or 1 doesn't want to receive data. | |
1701 | * | |
1702 | * It seems there is a bug in COSA firmware (need to trace it further): | |
1703 | * When the driver status says that the kernel has no more data for transmit | |
1704 | * (e.g. at the end of TX DMA) and then the kernel changes its mind | |
1705 | * (e.g. new packet is queued to hard_start_xmit()), the card issues | |
1706 | * the TX interrupt but does not mark the channel as ready-to-transmit. | |
1707 | * The fix seems to be to push the packet to COSA despite its request. | |
1708 | * We first try to obey the card's opinion, and then fall back to forced TX. | |
1709 | */ | |
1710 | static inline void tx_interrupt(struct cosa_data *cosa, int status) | |
1711 | { | |
1712 | unsigned long flags, flags1; | |
1713 | #ifdef DEBUG_IRQS | |
1714 | printk(KERN_INFO "cosa%d: SR_DOWN_REQUEST status=0x%04x\n", | |
1715 | cosa->num, status); | |
1716 | #endif | |
1717 | spin_lock_irqsave(&cosa->lock, flags); | |
1718 | set_bit(TXBIT, &cosa->rxtx); | |
1719 | if (!test_bit(IRQBIT, &cosa->rxtx)) { | |
1720 | /* flow control, see the comment above */ | |
1721 | int i=0; | |
1722 | if (!cosa->txbitmap) { | |
1723 | printk(KERN_WARNING "%s: No channel wants data " | |
1724 | "in TX IRQ. Expect DMA timeout.", | |
1725 | cosa->name); | |
1726 | put_driver_status_nolock(cosa); | |
1727 | clear_bit(TXBIT, &cosa->rxtx); | |
1728 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1729 | return; | |
1730 | } | |
1731 | while(1) { | |
1732 | cosa->txchan++; | |
1733 | i++; | |
1734 | if (cosa->txchan >= cosa->nchannels) | |
1735 | cosa->txchan = 0; | |
1736 | if (!(cosa->txbitmap & (1<<cosa->txchan))) | |
1737 | continue; | |
1738 | if (~status & (1 << (cosa->txchan+DRIVER_TXMAP_SHIFT))) | |
1739 | break; | |
1740 | /* in second pass, accept first ready-to-TX channel */ | |
1741 | if (i > cosa->nchannels) { | |
1742 | /* Can be safely ignored */ | |
1743 | #ifdef DEBUG_IRQS | |
1744 | printk(KERN_DEBUG "%s: Forcing TX " | |
1745 | "to not-ready channel %d\n", | |
1746 | cosa->name, cosa->txchan); | |
1747 | #endif | |
1748 | break; | |
1749 | } | |
1750 | } | |
1751 | ||
1752 | cosa->txsize = cosa->chan[cosa->txchan].txsize; | |
1753 | if (cosa_dma_able(cosa->chan+cosa->txchan, | |
1754 | cosa->chan[cosa->txchan].txbuf, cosa->txsize)) { | |
1755 | cosa->txbuf = cosa->chan[cosa->txchan].txbuf; | |
1756 | } else { | |
1757 | memcpy(cosa->bouncebuf, cosa->chan[cosa->txchan].txbuf, | |
1758 | cosa->txsize); | |
1759 | cosa->txbuf = cosa->bouncebuf; | |
1760 | } | |
1761 | } | |
1762 | ||
1763 | if (is_8bit(cosa)) { | |
1764 | if (!test_bit(IRQBIT, &cosa->rxtx)) { | |
1765 | cosa_putstatus(cosa, SR_TX_INT_ENA); | |
1766 | cosa_putdata8(cosa, ((cosa->txchan << 5) & 0xe0)| | |
1767 | ((cosa->txsize >> 8) & 0x1f)); | |
1768 | #ifdef DEBUG_IO | |
1769 | debug_status_out(cosa, SR_TX_INT_ENA); | |
1770 | debug_data_out(cosa, ((cosa->txchan << 5) & 0xe0)| | |
1771 | ((cosa->txsize >> 8) & 0x1f)); | |
1772 | debug_data_in(cosa, cosa_getdata8(cosa)); | |
1773 | #else | |
1774 | cosa_getdata8(cosa); | |
1775 | #endif | |
1776 | set_bit(IRQBIT, &cosa->rxtx); | |
1777 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1778 | return; | |
1779 | } else { | |
1780 | clear_bit(IRQBIT, &cosa->rxtx); | |
1781 | cosa_putstatus(cosa, 0); | |
1782 | cosa_putdata8(cosa, cosa->txsize&0xff); | |
1783 | #ifdef DEBUG_IO | |
1784 | debug_status_out(cosa, 0); | |
1785 | debug_data_out(cosa, cosa->txsize&0xff); | |
1786 | #endif | |
1787 | } | |
1788 | } else { | |
1789 | cosa_putstatus(cosa, SR_TX_INT_ENA); | |
1790 | cosa_putdata16(cosa, ((cosa->txchan<<13) & 0xe000) | |
1791 | | (cosa->txsize & 0x1fff)); | |
1792 | #ifdef DEBUG_IO | |
1793 | debug_status_out(cosa, SR_TX_INT_ENA); | |
1794 | debug_data_out(cosa, ((cosa->txchan<<13) & 0xe000) | |
1795 | | (cosa->txsize & 0x1fff)); | |
1796 | debug_data_in(cosa, cosa_getdata8(cosa)); | |
1797 | debug_status_out(cosa, 0); | |
1798 | #else | |
1799 | cosa_getdata8(cosa); | |
1800 | #endif | |
1801 | cosa_putstatus(cosa, 0); | |
1802 | } | |
1803 | ||
1804 | if (cosa->busmaster) { | |
1805 | unsigned long addr = virt_to_bus(cosa->txbuf); | |
1806 | int count=0; | |
1807 | printk(KERN_INFO "busmaster IRQ\n"); | |
1808 | while (!(cosa_getstatus(cosa)&SR_TX_RDY)) { | |
1809 | count++; | |
1810 | udelay(10); | |
1811 | if (count > 1000) break; | |
1812 | } | |
1813 | printk(KERN_INFO "status %x\n", cosa_getstatus(cosa)); | |
1814 | printk(KERN_INFO "ready after %d loops\n", count); | |
1815 | cosa_putdata16(cosa, (addr >> 16)&0xffff); | |
1816 | ||
1817 | count = 0; | |
1818 | while (!(cosa_getstatus(cosa)&SR_TX_RDY)) { | |
1819 | count++; | |
1820 | if (count > 1000) break; | |
1821 | udelay(10); | |
1822 | } | |
1823 | printk(KERN_INFO "ready after %d loops\n", count); | |
1824 | cosa_putdata16(cosa, addr &0xffff); | |
1825 | flags1 = claim_dma_lock(); | |
1826 | set_dma_mode(cosa->dma, DMA_MODE_CASCADE); | |
1827 | enable_dma(cosa->dma); | |
1828 | release_dma_lock(flags1); | |
1829 | } else { | |
1830 | /* start the DMA */ | |
1831 | flags1 = claim_dma_lock(); | |
1832 | disable_dma(cosa->dma); | |
1833 | clear_dma_ff(cosa->dma); | |
1834 | set_dma_mode(cosa->dma, DMA_MODE_WRITE); | |
1835 | set_dma_addr(cosa->dma, virt_to_bus(cosa->txbuf)); | |
1836 | set_dma_count(cosa->dma, cosa->txsize); | |
1837 | enable_dma(cosa->dma); | |
1838 | release_dma_lock(flags1); | |
1839 | } | |
1840 | cosa_putstatus(cosa, SR_TX_DMA_ENA|SR_USR_INT_ENA); | |
1841 | #ifdef DEBUG_IO | |
1842 | debug_status_out(cosa, SR_TX_DMA_ENA|SR_USR_INT_ENA); | |
1843 | #endif | |
1844 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1845 | } | |
1846 | ||
1847 | static inline void rx_interrupt(struct cosa_data *cosa, int status) | |
1848 | { | |
1849 | unsigned long flags; | |
1850 | #ifdef DEBUG_IRQS | |
1851 | printk(KERN_INFO "cosa%d: SR_UP_REQUEST\n", cosa->num); | |
1852 | #endif | |
1853 | ||
1854 | spin_lock_irqsave(&cosa->lock, flags); | |
1855 | set_bit(RXBIT, &cosa->rxtx); | |
1856 | ||
1857 | if (is_8bit(cosa)) { | |
1858 | if (!test_bit(IRQBIT, &cosa->rxtx)) { | |
1859 | set_bit(IRQBIT, &cosa->rxtx); | |
1860 | put_driver_status_nolock(cosa); | |
1861 | cosa->rxsize = cosa_getdata8(cosa) <<8; | |
1862 | #ifdef DEBUG_IO | |
1863 | debug_data_in(cosa, cosa->rxsize >> 8); | |
1864 | #endif | |
1865 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1866 | return; | |
1867 | } else { | |
1868 | clear_bit(IRQBIT, &cosa->rxtx); | |
1869 | cosa->rxsize |= cosa_getdata8(cosa) & 0xff; | |
1870 | #ifdef DEBUG_IO | |
1871 | debug_data_in(cosa, cosa->rxsize & 0xff); | |
1872 | #endif | |
1873 | #if 0 | |
1874 | printk(KERN_INFO "cosa%d: receive rxsize = (0x%04x).\n", | |
1875 | cosa->num, cosa->rxsize); | |
1876 | #endif | |
1877 | } | |
1878 | } else { | |
1879 | cosa->rxsize = cosa_getdata16(cosa); | |
1880 | #ifdef DEBUG_IO | |
1881 | debug_data_in(cosa, cosa->rxsize); | |
1882 | #endif | |
1883 | #if 0 | |
1884 | printk(KERN_INFO "cosa%d: receive rxsize = (0x%04x).\n", | |
1885 | cosa->num, cosa->rxsize); | |
1886 | #endif | |
1887 | } | |
1888 | if (((cosa->rxsize & 0xe000) >> 13) >= cosa->nchannels) { | |
1889 | printk(KERN_WARNING "%s: rx for unknown channel (0x%04x)\n", | |
1890 | cosa->name, cosa->rxsize); | |
1891 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1892 | goto reject; | |
1893 | } | |
1894 | cosa->rxchan = cosa->chan + ((cosa->rxsize & 0xe000) >> 13); | |
1895 | cosa->rxsize &= 0x1fff; | |
1896 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1897 | ||
1898 | cosa->rxbuf = NULL; | |
1899 | if (cosa->rxchan->setup_rx) | |
1900 | cosa->rxbuf = cosa->rxchan->setup_rx(cosa->rxchan, cosa->rxsize); | |
1901 | ||
1902 | if (!cosa->rxbuf) { | |
1903 | reject: /* Reject the packet */ | |
1904 | printk(KERN_INFO "cosa%d: rejecting packet on channel %d\n", | |
1905 | cosa->num, cosa->rxchan->num); | |
1906 | cosa->rxbuf = cosa->bouncebuf; | |
1907 | } | |
1908 | ||
1909 | /* start the DMA */ | |
1910 | flags = claim_dma_lock(); | |
1911 | disable_dma(cosa->dma); | |
1912 | clear_dma_ff(cosa->dma); | |
1913 | set_dma_mode(cosa->dma, DMA_MODE_READ); | |
1914 | if (cosa_dma_able(cosa->rxchan, cosa->rxbuf, cosa->rxsize & 0x1fff)) { | |
1915 | set_dma_addr(cosa->dma, virt_to_bus(cosa->rxbuf)); | |
1916 | } else { | |
1917 | set_dma_addr(cosa->dma, virt_to_bus(cosa->bouncebuf)); | |
1918 | } | |
1919 | set_dma_count(cosa->dma, (cosa->rxsize&0x1fff)); | |
1920 | enable_dma(cosa->dma); | |
1921 | release_dma_lock(flags); | |
1922 | spin_lock_irqsave(&cosa->lock, flags); | |
1923 | cosa_putstatus(cosa, SR_RX_DMA_ENA|SR_USR_INT_ENA); | |
1924 | if (!is_8bit(cosa) && (status & SR_TX_RDY)) | |
1925 | cosa_putdata8(cosa, DRIVER_RX_READY); | |
1926 | #ifdef DEBUG_IO | |
1927 | debug_status_out(cosa, SR_RX_DMA_ENA|SR_USR_INT_ENA); | |
1928 | if (!is_8bit(cosa) && (status & SR_TX_RDY)) | |
1929 | debug_data_cmd(cosa, DRIVER_RX_READY); | |
1930 | #endif | |
1931 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1932 | } | |
1933 | ||
1934 | static inline void eot_interrupt(struct cosa_data *cosa, int status) | |
1935 | { | |
1936 | unsigned long flags, flags1; | |
1937 | spin_lock_irqsave(&cosa->lock, flags); | |
1938 | flags1 = claim_dma_lock(); | |
1939 | disable_dma(cosa->dma); | |
1940 | clear_dma_ff(cosa->dma); | |
1941 | release_dma_lock(flags1); | |
1942 | if (test_bit(TXBIT, &cosa->rxtx)) { | |
1943 | struct channel_data *chan = cosa->chan+cosa->txchan; | |
1944 | if (chan->tx_done) | |
1945 | if (chan->tx_done(chan, cosa->txsize)) | |
1946 | clear_bit(chan->num, &cosa->txbitmap); | |
1947 | } else if (test_bit(RXBIT, &cosa->rxtx)) { | |
1948 | #ifdef DEBUG_DATA | |
1949 | { | |
1950 | int i; | |
1951 | printk(KERN_INFO "cosa%dc%d: done rx(0x%x)", cosa->num, | |
1952 | cosa->rxchan->num, cosa->rxsize); | |
1953 | for (i=0; i<cosa->rxsize; i++) | |
1954 | printk (" %02x", cosa->rxbuf[i]&0xff); | |
1955 | printk("\n"); | |
1956 | } | |
1957 | #endif | |
1958 | /* Packet for unknown channel? */ | |
1959 | if (cosa->rxbuf == cosa->bouncebuf) | |
1960 | goto out; | |
1961 | if (!cosa_dma_able(cosa->rxchan, cosa->rxbuf, cosa->rxsize)) | |
1962 | memcpy(cosa->rxbuf, cosa->bouncebuf, cosa->rxsize); | |
1963 | if (cosa->rxchan->rx_done) | |
1964 | if (cosa->rxchan->rx_done(cosa->rxchan)) | |
1965 | clear_bit(cosa->rxchan->num, &cosa->rxbitmap); | |
1966 | } else { | |
1967 | printk(KERN_NOTICE "cosa%d: unexpected EOT interrupt\n", | |
1968 | cosa->num); | |
1969 | } | |
1970 | /* | |
1971 | * Clear the RXBIT, TXBIT and IRQBIT (the latest should be | |
1972 | * cleared anyway). We should do it as soon as possible | |
1973 | * so that we can tell the COSA we are done and to give it a time | |
1974 | * for recovery. | |
1975 | */ | |
1976 | out: | |
1977 | cosa->rxtx = 0; | |
1978 | put_driver_status_nolock(cosa); | |
1979 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1980 | } | |
1981 | ||
7d12e780 | 1982 | static irqreturn_t cosa_interrupt(int irq, void *cosa_) |
1da177e4 LT |
1983 | { |
1984 | unsigned status; | |
1985 | int count = 0; | |
1986 | struct cosa_data *cosa = cosa_; | |
1987 | again: | |
1988 | status = cosa_getstatus(cosa); | |
1989 | #ifdef DEBUG_IRQS | |
1990 | printk(KERN_INFO "cosa%d: got IRQ, status 0x%02x\n", cosa->num, | |
1991 | status & 0xff); | |
1992 | #endif | |
1993 | #ifdef DEBUG_IO | |
1994 | debug_status_in(cosa, status); | |
1995 | #endif | |
1996 | switch (status & SR_CMD_FROM_SRP_MASK) { | |
1997 | case SR_DOWN_REQUEST: | |
1998 | tx_interrupt(cosa, status); | |
1999 | break; | |
2000 | case SR_UP_REQUEST: | |
2001 | rx_interrupt(cosa, status); | |
2002 | break; | |
2003 | case SR_END_OF_TRANSFER: | |
2004 | eot_interrupt(cosa, status); | |
2005 | break; | |
2006 | default: | |
2007 | /* We may be too fast for SRP. Try to wait a bit more. */ | |
2008 | if (count++ < 100) { | |
2009 | udelay(100); | |
2010 | goto again; | |
2011 | } | |
2012 | printk(KERN_INFO "cosa%d: unknown status 0x%02x in IRQ after %d retries\n", | |
2013 | cosa->num, status & 0xff, count); | |
2014 | } | |
2015 | #ifdef DEBUG_IRQS | |
2016 | if (count) | |
2017 | printk(KERN_INFO "%s: %d-times got unknown status in IRQ\n", | |
2018 | cosa->name, count); | |
2019 | else | |
2020 | printk(KERN_INFO "%s: returning from IRQ\n", cosa->name); | |
2021 | #endif | |
2022 | return IRQ_HANDLED; | |
2023 | } | |
2024 | ||
2025 | \f | |
2026 | /* ---------- I/O debugging routines ---------- */ | |
2027 | /* | |
2028 | * These routines can be used to monitor COSA/SRP I/O and to printk() | |
2029 | * the data being transferred on the data and status I/O port in a | |
2030 | * readable way. | |
2031 | */ | |
2032 | ||
2033 | #ifdef DEBUG_IO | |
2034 | static void debug_status_in(struct cosa_data *cosa, int status) | |
2035 | { | |
2036 | char *s; | |
2037 | switch(status & SR_CMD_FROM_SRP_MASK) { | |
2038 | case SR_UP_REQUEST: | |
2039 | s = "RX_REQ"; | |
2040 | break; | |
2041 | case SR_DOWN_REQUEST: | |
2042 | s = "TX_REQ"; | |
2043 | break; | |
2044 | case SR_END_OF_TRANSFER: | |
2045 | s = "ET_REQ"; | |
2046 | break; | |
2047 | default: | |
2048 | s = "NO_REQ"; | |
2049 | break; | |
2050 | } | |
2051 | printk(KERN_INFO "%s: IO: status -> 0x%02x (%s%s%s%s)\n", | |
2052 | cosa->name, | |
2053 | status, | |
2054 | status & SR_USR_RQ ? "USR_RQ|":"", | |
2055 | status & SR_TX_RDY ? "TX_RDY|":"", | |
2056 | status & SR_RX_RDY ? "RX_RDY|":"", | |
2057 | s); | |
2058 | } | |
2059 | ||
2060 | static void debug_status_out(struct cosa_data *cosa, int status) | |
2061 | { | |
2062 | printk(KERN_INFO "%s: IO: status <- 0x%02x (%s%s%s%s%s%s)\n", | |
2063 | cosa->name, | |
2064 | status, | |
2065 | status & SR_RX_DMA_ENA ? "RXDMA|":"!rxdma|", | |
2066 | status & SR_TX_DMA_ENA ? "TXDMA|":"!txdma|", | |
2067 | status & SR_RST ? "RESET|":"", | |
2068 | status & SR_USR_INT_ENA ? "USRINT|":"!usrint|", | |
2069 | status & SR_TX_INT_ENA ? "TXINT|":"!txint|", | |
2070 | status & SR_RX_INT_ENA ? "RXINT":"!rxint"); | |
2071 | } | |
2072 | ||
2073 | static void debug_data_in(struct cosa_data *cosa, int data) | |
2074 | { | |
2075 | printk(KERN_INFO "%s: IO: data -> 0x%04x\n", cosa->name, data); | |
2076 | } | |
2077 | ||
2078 | static void debug_data_out(struct cosa_data *cosa, int data) | |
2079 | { | |
2080 | printk(KERN_INFO "%s: IO: data <- 0x%04x\n", cosa->name, data); | |
2081 | } | |
2082 | ||
2083 | static void debug_data_cmd(struct cosa_data *cosa, int data) | |
2084 | { | |
2085 | printk(KERN_INFO "%s: IO: data <- 0x%04x (%s|%s)\n", | |
2086 | cosa->name, data, | |
2087 | data & SR_RDY_RCV ? "RX_RDY" : "!rx_rdy", | |
2088 | data & SR_RDY_SND ? "TX_RDY" : "!tx_rdy"); | |
2089 | } | |
2090 | #endif | |
2091 | ||
2092 | /* EOF -- this file has not been truncated */ |