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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 | ||
82 | #include <linux/config.h> | |
83 | #include <linux/module.h> | |
84 | #include <linux/kernel.h> | |
85 | #include <linux/slab.h> | |
86 | #include <linux/poll.h> | |
87 | #include <linux/fs.h> | |
88 | #include <linux/devfs_fs_kernel.h> | |
89 | #include <linux/interrupt.h> | |
90 | #include <linux/delay.h> | |
91 | #include <linux/errno.h> | |
92 | #include <linux/ioport.h> | |
93 | #include <linux/netdevice.h> | |
94 | #include <linux/spinlock.h> | |
95 | #include <linux/smp_lock.h> | |
96 | #include <linux/device.h> | |
97 | ||
98 | #undef COSA_SLOW_IO /* for testing purposes only */ | |
99 | #undef REALLY_SLOW_IO | |
100 | ||
101 | #include <asm/io.h> | |
102 | #include <asm/dma.h> | |
103 | #include <asm/byteorder.h> | |
104 | ||
105 | #include <net/syncppp.h> | |
106 | #include "cosa.h" | |
107 | ||
108 | /* Maximum length of the identification string. */ | |
109 | #define COSA_MAX_ID_STRING 128 | |
110 | ||
111 | /* Maximum length of the channel name */ | |
112 | #define COSA_MAX_NAME (sizeof("cosaXXXcXXX")+1) | |
113 | ||
114 | /* Per-channel data structure */ | |
115 | ||
116 | struct channel_data { | |
117 | void *if_ptr; /* General purpose pointer (used by SPPP) */ | |
118 | int usage; /* Usage count; >0 for chrdev, -1 for netdev */ | |
119 | int num; /* Number of the channel */ | |
120 | struct cosa_data *cosa; /* Pointer to the per-card structure */ | |
121 | int txsize; /* Size of transmitted data */ | |
122 | char *txbuf; /* Transmit buffer */ | |
123 | char name[COSA_MAX_NAME]; /* channel name */ | |
124 | ||
125 | /* The HW layer interface */ | |
126 | /* routine called from the RX interrupt */ | |
127 | char *(*setup_rx)(struct channel_data *channel, int size); | |
128 | /* routine called when the RX is done (from the EOT interrupt) */ | |
129 | int (*rx_done)(struct channel_data *channel); | |
130 | /* routine called when the TX is done (from the EOT interrupt) */ | |
131 | int (*tx_done)(struct channel_data *channel, int size); | |
132 | ||
133 | /* Character device parts */ | |
134 | struct semaphore rsem, wsem; | |
135 | char *rxdata; | |
136 | int rxsize; | |
137 | wait_queue_head_t txwaitq, rxwaitq; | |
138 | int tx_status, rx_status; | |
139 | ||
140 | /* SPPP/HDLC device parts */ | |
141 | struct ppp_device pppdev; | |
142 | struct sk_buff *rx_skb, *tx_skb; | |
143 | struct net_device_stats stats; | |
144 | }; | |
145 | ||
146 | /* cosa->firmware_status bits */ | |
147 | #define COSA_FW_RESET (1<<0) /* Is the ROM monitor active? */ | |
148 | #define COSA_FW_DOWNLOAD (1<<1) /* Is the microcode downloaded? */ | |
149 | #define COSA_FW_START (1<<2) /* Is the microcode running? */ | |
150 | ||
151 | struct cosa_data { | |
152 | int num; /* Card number */ | |
153 | char name[COSA_MAX_NAME]; /* Card name - e.g "cosa0" */ | |
154 | unsigned int datareg, statusreg; /* I/O ports */ | |
155 | unsigned short irq, dma; /* IRQ and DMA number */ | |
156 | unsigned short startaddr; /* Firmware start address */ | |
157 | unsigned short busmaster; /* Use busmastering? */ | |
158 | int nchannels; /* # of channels on this card */ | |
159 | int driver_status; /* For communicating with firmware */ | |
160 | int firmware_status; /* Downloaded, reseted, etc. */ | |
161 | long int rxbitmap, txbitmap; /* Bitmap of channels who are willing to send/receive data */ | |
162 | long int rxtx; /* RX or TX in progress? */ | |
163 | int enabled; | |
164 | int usage; /* usage count */ | |
165 | int txchan, txsize, rxsize; | |
166 | struct channel_data *rxchan; | |
167 | char *bouncebuf; | |
168 | char *txbuf, *rxbuf; | |
169 | struct channel_data *chan; | |
170 | spinlock_t lock; /* For exclusive operations on this structure */ | |
171 | char id_string[COSA_MAX_ID_STRING]; /* ROM monitor ID string */ | |
172 | char *type; /* card type */ | |
173 | }; | |
174 | ||
175 | /* | |
176 | * Define this if you want all the possible ports to be autoprobed. | |
177 | * It is here but it probably is not a good idea to use this. | |
178 | */ | |
179 | /* #define COSA_ISA_AUTOPROBE 1 */ | |
180 | ||
181 | /* | |
182 | * Character device major number. 117 was allocated for us. | |
183 | * The value of 0 means to allocate a first free one. | |
184 | */ | |
185 | static int cosa_major = 117; | |
186 | ||
187 | /* | |
188 | * Encoding of the minor numbers: | |
189 | * The lowest CARD_MINOR_BITS bits means the channel on the single card, | |
190 | * the highest bits means the card number. | |
191 | */ | |
192 | #define CARD_MINOR_BITS 4 /* How many bits in minor number are reserved | |
193 | * for the single card */ | |
194 | /* | |
195 | * The following depends on CARD_MINOR_BITS. Unfortunately, the "MODULE_STRING" | |
196 | * macro doesn't like anything other than the raw number as an argument :-( | |
197 | */ | |
198 | #define MAX_CARDS 16 | |
199 | /* #define MAX_CARDS (1 << (8-CARD_MINOR_BITS)) */ | |
200 | ||
201 | #define DRIVER_RX_READY 0x0001 | |
202 | #define DRIVER_TX_READY 0x0002 | |
203 | #define DRIVER_TXMAP_SHIFT 2 | |
204 | #define DRIVER_TXMAP_MASK 0x0c /* FIXME: 0xfc for 8-channel version */ | |
205 | ||
206 | /* | |
207 | * for cosa->rxtx - indicates whether either transmit or receive is | |
208 | * in progress. These values are mean number of the bit. | |
209 | */ | |
210 | #define TXBIT 0 | |
211 | #define RXBIT 1 | |
212 | #define IRQBIT 2 | |
213 | ||
214 | #define COSA_MTU 2000 /* FIXME: I don't know this exactly */ | |
215 | ||
216 | #undef DEBUG_DATA //1 /* Dump the data read or written to the channel */ | |
217 | #undef DEBUG_IRQS //1 /* Print the message when the IRQ is received */ | |
218 | #undef DEBUG_IO //1 /* Dump the I/O traffic */ | |
219 | ||
220 | #define TX_TIMEOUT (5*HZ) | |
221 | ||
222 | /* Maybe the following should be allocated dynamically */ | |
223 | static struct cosa_data cosa_cards[MAX_CARDS]; | |
224 | static int nr_cards; | |
225 | ||
226 | #ifdef COSA_ISA_AUTOPROBE | |
227 | static int io[MAX_CARDS+1] = { 0x220, 0x228, 0x210, 0x218, 0, }; | |
228 | /* NOTE: DMA is not autoprobed!!! */ | |
229 | static int dma[MAX_CARDS+1] = { 1, 7, 1, 7, 1, 7, 1, 7, 0, }; | |
230 | #else | |
231 | static int io[MAX_CARDS+1]; | |
232 | static int dma[MAX_CARDS+1]; | |
233 | #endif | |
234 | /* IRQ can be safely autoprobed */ | |
235 | static int irq[MAX_CARDS+1] = { -1, -1, -1, -1, -1, -1, 0, }; | |
236 | ||
237 | /* for class stuff*/ | |
56b22935 | 238 | static struct class *cosa_class; |
1da177e4 LT |
239 | |
240 | #ifdef MODULE | |
241 | module_param_array(io, int, NULL, 0); | |
242 | MODULE_PARM_DESC(io, "The I/O bases of the COSA or SRP cards"); | |
243 | module_param_array(irq, int, NULL, 0); | |
244 | MODULE_PARM_DESC(irq, "The IRQ lines of the COSA or SRP cards"); | |
245 | module_param_array(dma, int, NULL, 0); | |
246 | MODULE_PARM_DESC(dma, "The DMA channels of the COSA or SRP cards"); | |
247 | ||
248 | MODULE_AUTHOR("Jan \"Yenya\" Kasprzak, <kas@fi.muni.cz>"); | |
249 | MODULE_DESCRIPTION("Modular driver for the COSA or SRP synchronous card"); | |
250 | MODULE_LICENSE("GPL"); | |
251 | #endif | |
252 | ||
253 | /* I use this mainly for testing purposes */ | |
254 | #ifdef COSA_SLOW_IO | |
255 | #define cosa_outb outb_p | |
256 | #define cosa_outw outw_p | |
257 | #define cosa_inb inb_p | |
258 | #define cosa_inw inw_p | |
259 | #else | |
260 | #define cosa_outb outb | |
261 | #define cosa_outw outw | |
262 | #define cosa_inb inb | |
263 | #define cosa_inw inw | |
264 | #endif | |
265 | ||
266 | #define is_8bit(cosa) (!(cosa->datareg & 0x08)) | |
267 | ||
268 | #define cosa_getstatus(cosa) (cosa_inb(cosa->statusreg)) | |
269 | #define cosa_putstatus(cosa, stat) (cosa_outb(stat, cosa->statusreg)) | |
270 | #define cosa_getdata16(cosa) (cosa_inw(cosa->datareg)) | |
271 | #define cosa_getdata8(cosa) (cosa_inb(cosa->datareg)) | |
272 | #define cosa_putdata16(cosa, dt) (cosa_outw(dt, cosa->datareg)) | |
273 | #define cosa_putdata8(cosa, dt) (cosa_outb(dt, cosa->datareg)) | |
274 | ||
275 | /* Initialization stuff */ | |
276 | static int cosa_probe(int ioaddr, int irq, int dma); | |
277 | ||
278 | /* HW interface */ | |
279 | static void cosa_enable_rx(struct channel_data *chan); | |
280 | static void cosa_disable_rx(struct channel_data *chan); | |
281 | static int cosa_start_tx(struct channel_data *channel, char *buf, int size); | |
282 | static void cosa_kick(struct cosa_data *cosa); | |
283 | static int cosa_dma_able(struct channel_data *chan, char *buf, int data); | |
284 | ||
285 | /* SPPP/HDLC stuff */ | |
286 | static void sppp_channel_init(struct channel_data *chan); | |
287 | static void sppp_channel_delete(struct channel_data *chan); | |
288 | static int cosa_sppp_open(struct net_device *d); | |
289 | static int cosa_sppp_close(struct net_device *d); | |
290 | static void cosa_sppp_timeout(struct net_device *d); | |
291 | static int cosa_sppp_tx(struct sk_buff *skb, struct net_device *d); | |
292 | static char *sppp_setup_rx(struct channel_data *channel, int size); | |
293 | static int sppp_rx_done(struct channel_data *channel); | |
294 | static int sppp_tx_done(struct channel_data *channel, int size); | |
295 | static int cosa_sppp_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd); | |
296 | static struct net_device_stats *cosa_net_stats(struct net_device *dev); | |
297 | ||
298 | /* Character device */ | |
299 | static void chardev_channel_init(struct channel_data *chan); | |
300 | static char *chrdev_setup_rx(struct channel_data *channel, int size); | |
301 | static int chrdev_rx_done(struct channel_data *channel); | |
302 | static int chrdev_tx_done(struct channel_data *channel, int size); | |
303 | static ssize_t cosa_read(struct file *file, | |
304 | char __user *buf, size_t count, loff_t *ppos); | |
305 | static ssize_t cosa_write(struct file *file, | |
306 | const char __user *buf, size_t count, loff_t *ppos); | |
307 | static unsigned int cosa_poll(struct file *file, poll_table *poll); | |
308 | static int cosa_open(struct inode *inode, struct file *file); | |
309 | static int cosa_release(struct inode *inode, struct file *file); | |
310 | static int cosa_chardev_ioctl(struct inode *inode, struct file *file, | |
311 | unsigned int cmd, unsigned long arg); | |
312 | #ifdef COSA_FASYNC_WORKING | |
313 | static int cosa_fasync(struct inode *inode, struct file *file, int on); | |
314 | #endif | |
315 | ||
316 | static struct file_operations cosa_fops = { | |
317 | .owner = THIS_MODULE, | |
318 | .llseek = no_llseek, | |
319 | .read = cosa_read, | |
320 | .write = cosa_write, | |
321 | .poll = cosa_poll, | |
322 | .ioctl = cosa_chardev_ioctl, | |
323 | .open = cosa_open, | |
324 | .release = cosa_release, | |
325 | #ifdef COSA_FASYNC_WORKING | |
326 | .fasync = cosa_fasync, | |
327 | #endif | |
328 | }; | |
329 | ||
330 | /* Ioctls */ | |
331 | static int cosa_start(struct cosa_data *cosa, int address); | |
332 | static int cosa_reset(struct cosa_data *cosa); | |
333 | static int cosa_download(struct cosa_data *cosa, void __user *a); | |
334 | static int cosa_readmem(struct cosa_data *cosa, void __user *a); | |
335 | ||
336 | /* COSA/SRP ROM monitor */ | |
337 | static int download(struct cosa_data *cosa, const char __user *data, int addr, int len); | |
338 | static int startmicrocode(struct cosa_data *cosa, int address); | |
339 | static int readmem(struct cosa_data *cosa, char __user *data, int addr, int len); | |
340 | static int cosa_reset_and_read_id(struct cosa_data *cosa, char *id); | |
341 | ||
342 | /* Auxilliary functions */ | |
343 | static int get_wait_data(struct cosa_data *cosa); | |
344 | static int put_wait_data(struct cosa_data *cosa, int data); | |
345 | static int puthexnumber(struct cosa_data *cosa, int number); | |
346 | static void put_driver_status(struct cosa_data *cosa); | |
347 | static void put_driver_status_nolock(struct cosa_data *cosa); | |
348 | ||
349 | /* Interrupt handling */ | |
350 | static irqreturn_t cosa_interrupt(int irq, void *cosa, struct pt_regs *regs); | |
351 | ||
352 | /* I/O ops debugging */ | |
353 | #ifdef DEBUG_IO | |
354 | static void debug_data_in(struct cosa_data *cosa, int data); | |
355 | static void debug_data_out(struct cosa_data *cosa, int data); | |
356 | static void debug_data_cmd(struct cosa_data *cosa, int data); | |
357 | static void debug_status_in(struct cosa_data *cosa, int status); | |
358 | static void debug_status_out(struct cosa_data *cosa, int status); | |
359 | #endif | |
360 | ||
361 | \f | |
362 | /* ---------- Initialization stuff ---------- */ | |
363 | ||
364 | static int __init cosa_init(void) | |
365 | { | |
366 | int i, err = 0; | |
367 | ||
368 | printk(KERN_INFO "cosa v1.08 (c) 1997-2000 Jan Kasprzak <kas@fi.muni.cz>\n"); | |
369 | #ifdef CONFIG_SMP | |
370 | printk(KERN_INFO "cosa: SMP found. Please mail any success/failure reports to the author.\n"); | |
371 | #endif | |
372 | if (cosa_major > 0) { | |
373 | if (register_chrdev(cosa_major, "cosa", &cosa_fops)) { | |
374 | printk(KERN_WARNING "cosa: unable to get major %d\n", | |
375 | cosa_major); | |
376 | err = -EIO; | |
377 | goto out; | |
378 | } | |
379 | } else { | |
380 | if (!(cosa_major=register_chrdev(0, "cosa", &cosa_fops))) { | |
381 | printk(KERN_WARNING "cosa: unable to register chardev\n"); | |
382 | err = -EIO; | |
383 | goto out; | |
384 | } | |
385 | } | |
386 | for (i=0; i<MAX_CARDS; i++) | |
387 | cosa_cards[i].num = -1; | |
388 | for (i=0; io[i] != 0 && i < MAX_CARDS; i++) | |
389 | cosa_probe(io[i], irq[i], dma[i]); | |
390 | if (!nr_cards) { | |
391 | printk(KERN_WARNING "cosa: no devices found.\n"); | |
392 | unregister_chrdev(cosa_major, "cosa"); | |
393 | err = -ENODEV; | |
394 | goto out; | |
395 | } | |
396 | devfs_mk_dir("cosa"); | |
56b22935 | 397 | cosa_class = class_create(THIS_MODULE, "cosa"); |
1da177e4 LT |
398 | if (IS_ERR(cosa_class)) { |
399 | err = PTR_ERR(cosa_class); | |
400 | goto out_chrdev; | |
401 | } | |
402 | for (i=0; i<nr_cards; i++) { | |
56b22935 | 403 | class_device_create(cosa_class, MKDEV(cosa_major, i), |
1da177e4 LT |
404 | NULL, "cosa%d", i); |
405 | err = devfs_mk_cdev(MKDEV(cosa_major, i), | |
406 | S_IFCHR|S_IRUSR|S_IWUSR, | |
407 | "cosa/%d", i); | |
408 | if (err) { | |
56b22935 | 409 | class_device_destroy(cosa_class, MKDEV(cosa_major, i)); |
1da177e4 LT |
410 | goto out_chrdev; |
411 | } | |
412 | } | |
413 | err = 0; | |
414 | goto out; | |
415 | ||
416 | out_chrdev: | |
417 | unregister_chrdev(cosa_major, "cosa"); | |
418 | out: | |
419 | return err; | |
420 | } | |
421 | module_init(cosa_init); | |
422 | ||
423 | static void __exit cosa_exit(void) | |
424 | { | |
425 | struct cosa_data *cosa; | |
426 | int i; | |
427 | printk(KERN_INFO "Unloading the cosa module\n"); | |
428 | ||
429 | for (i=0; i<nr_cards; i++) { | |
56b22935 | 430 | class_device_destroy(cosa_class, MKDEV(cosa_major, i)); |
1da177e4 LT |
431 | devfs_remove("cosa/%d", i); |
432 | } | |
56b22935 | 433 | class_destroy(cosa_class); |
1da177e4 LT |
434 | devfs_remove("cosa"); |
435 | for (cosa=cosa_cards; nr_cards--; cosa++) { | |
436 | /* Clean up the per-channel data */ | |
437 | for (i=0; i<cosa->nchannels; i++) { | |
438 | /* Chardev driver has no alloc'd per-channel data */ | |
439 | sppp_channel_delete(cosa->chan+i); | |
440 | } | |
441 | /* Clean up the per-card data */ | |
442 | kfree(cosa->chan); | |
443 | kfree(cosa->bouncebuf); | |
444 | free_irq(cosa->irq, cosa); | |
445 | free_dma(cosa->dma); | |
446 | release_region(cosa->datareg,is_8bit(cosa)?2:4); | |
447 | } | |
448 | unregister_chrdev(cosa_major, "cosa"); | |
449 | } | |
450 | module_exit(cosa_exit); | |
451 | ||
452 | /* | |
453 | * This function should register all the net devices needed for the | |
454 | * single channel. | |
455 | */ | |
456 | static __inline__ void channel_init(struct channel_data *chan) | |
457 | { | |
458 | sprintf(chan->name, "cosa%dc%d", chan->cosa->num, chan->num); | |
459 | ||
460 | /* Initialize the chardev data structures */ | |
461 | chardev_channel_init(chan); | |
462 | ||
463 | /* Register the sppp interface */ | |
464 | sppp_channel_init(chan); | |
465 | } | |
466 | ||
467 | static int cosa_probe(int base, int irq, int dma) | |
468 | { | |
469 | struct cosa_data *cosa = cosa_cards+nr_cards; | |
470 | int i, err = 0; | |
471 | ||
472 | memset(cosa, 0, sizeof(struct cosa_data)); | |
473 | ||
474 | /* Checking validity of parameters: */ | |
475 | /* IRQ should be 2-7 or 10-15; negative IRQ means autoprobe */ | |
476 | if ((irq >= 0 && irq < 2) || irq > 15 || (irq < 10 && irq > 7)) { | |
477 | printk (KERN_INFO "cosa_probe: invalid IRQ %d\n", irq); | |
478 | return -1; | |
479 | } | |
480 | /* I/O address should be between 0x100 and 0x3ff and should be | |
481 | * multiple of 8. */ | |
482 | if (base < 0x100 || base > 0x3ff || base & 0x7) { | |
483 | printk (KERN_INFO "cosa_probe: invalid I/O address 0x%x\n", | |
484 | base); | |
485 | return -1; | |
486 | } | |
487 | /* DMA should be 0,1 or 3-7 */ | |
488 | if (dma < 0 || dma == 4 || dma > 7) { | |
489 | printk (KERN_INFO "cosa_probe: invalid DMA %d\n", dma); | |
490 | return -1; | |
491 | } | |
492 | /* and finally, on 16-bit COSA DMA should be 4-7 and | |
493 | * I/O base should not be multiple of 0x10 */ | |
494 | if (((base & 0x8) && dma < 4) || (!(base & 0x8) && dma > 3)) { | |
495 | printk (KERN_INFO "cosa_probe: 8/16 bit base and DMA mismatch" | |
496 | " (base=0x%x, dma=%d)\n", base, dma); | |
497 | return -1; | |
498 | } | |
499 | ||
500 | cosa->dma = dma; | |
501 | cosa->datareg = base; | |
502 | cosa->statusreg = is_8bit(cosa)?base+1:base+2; | |
503 | spin_lock_init(&cosa->lock); | |
504 | ||
505 | if (!request_region(base, is_8bit(cosa)?2:4,"cosa")) | |
506 | return -1; | |
507 | ||
508 | if (cosa_reset_and_read_id(cosa, cosa->id_string) < 0) { | |
509 | printk(KERN_DEBUG "cosa: probe at 0x%x failed.\n", base); | |
510 | err = -1; | |
511 | goto err_out; | |
512 | } | |
513 | ||
514 | /* Test the validity of identification string */ | |
515 | if (!strncmp(cosa->id_string, "SRP", 3)) | |
516 | cosa->type = "srp"; | |
517 | else if (!strncmp(cosa->id_string, "COSA", 4)) | |
518 | cosa->type = is_8bit(cosa)? "cosa8": "cosa16"; | |
519 | else { | |
520 | /* Print a warning only if we are not autoprobing */ | |
521 | #ifndef COSA_ISA_AUTOPROBE | |
522 | printk(KERN_INFO "cosa: valid signature not found at 0x%x.\n", | |
523 | base); | |
524 | #endif | |
525 | err = -1; | |
526 | goto err_out; | |
527 | } | |
528 | /* Update the name of the region now we know the type of card */ | |
529 | release_region(base, is_8bit(cosa)?2:4); | |
530 | if (!request_region(base, is_8bit(cosa)?2:4, cosa->type)) { | |
531 | printk(KERN_DEBUG "cosa: changing name at 0x%x failed.\n", base); | |
532 | return -1; | |
533 | } | |
534 | ||
535 | /* Now do IRQ autoprobe */ | |
536 | if (irq < 0) { | |
537 | unsigned long irqs; | |
538 | /* printk(KERN_INFO "IRQ autoprobe\n"); */ | |
539 | irqs = probe_irq_on(); | |
540 | /* | |
541 | * Enable interrupt on tx buffer empty (it sure is) | |
542 | * really sure ? | |
543 | * FIXME: When this code is not used as module, we should | |
544 | * probably call udelay() instead of the interruptible sleep. | |
545 | */ | |
546 | set_current_state(TASK_INTERRUPTIBLE); | |
547 | cosa_putstatus(cosa, SR_TX_INT_ENA); | |
548 | schedule_timeout(30); | |
549 | irq = probe_irq_off(irqs); | |
550 | /* Disable all IRQs from the card */ | |
551 | cosa_putstatus(cosa, 0); | |
552 | /* Empty the received data register */ | |
553 | cosa_getdata8(cosa); | |
554 | ||
555 | if (irq < 0) { | |
556 | printk (KERN_INFO "cosa IRQ autoprobe: multiple interrupts obtained (%d, board at 0x%x)\n", | |
557 | irq, cosa->datareg); | |
558 | err = -1; | |
559 | goto err_out; | |
560 | } | |
561 | if (irq == 0) { | |
562 | printk (KERN_INFO "cosa IRQ autoprobe: no interrupt obtained (board at 0x%x)\n", | |
563 | cosa->datareg); | |
564 | /* return -1; */ | |
565 | } | |
566 | } | |
567 | ||
568 | cosa->irq = irq; | |
569 | cosa->num = nr_cards; | |
570 | cosa->usage = 0; | |
571 | cosa->nchannels = 2; /* FIXME: how to determine this? */ | |
572 | ||
573 | if (request_irq(cosa->irq, cosa_interrupt, 0, cosa->type, cosa)) { | |
574 | err = -1; | |
575 | goto err_out; | |
576 | } | |
577 | if (request_dma(cosa->dma, cosa->type)) { | |
578 | err = -1; | |
579 | goto err_out1; | |
580 | } | |
581 | ||
582 | cosa->bouncebuf = kmalloc(COSA_MTU, GFP_KERNEL|GFP_DMA); | |
583 | if (!cosa->bouncebuf) { | |
584 | err = -ENOMEM; | |
585 | goto err_out2; | |
586 | } | |
587 | sprintf(cosa->name, "cosa%d", cosa->num); | |
588 | ||
589 | /* Initialize the per-channel data */ | |
590 | cosa->chan = kmalloc(sizeof(struct channel_data)*cosa->nchannels, | |
591 | GFP_KERNEL); | |
592 | if (!cosa->chan) { | |
593 | err = -ENOMEM; | |
594 | goto err_out3; | |
595 | } | |
596 | memset(cosa->chan, 0, sizeof(struct channel_data)*cosa->nchannels); | |
597 | for (i=0; i<cosa->nchannels; i++) { | |
598 | cosa->chan[i].cosa = cosa; | |
599 | cosa->chan[i].num = i; | |
600 | channel_init(cosa->chan+i); | |
601 | } | |
602 | ||
603 | printk (KERN_INFO "cosa%d: %s (%s at 0x%x irq %d dma %d), %d channels\n", | |
604 | cosa->num, cosa->id_string, cosa->type, | |
605 | cosa->datareg, cosa->irq, cosa->dma, cosa->nchannels); | |
606 | ||
607 | return nr_cards++; | |
608 | err_out3: | |
609 | kfree(cosa->bouncebuf); | |
610 | err_out2: | |
611 | free_dma(cosa->dma); | |
612 | err_out1: | |
613 | free_irq(cosa->irq, cosa); | |
614 | err_out: | |
615 | release_region(cosa->datareg,is_8bit(cosa)?2:4); | |
616 | printk(KERN_NOTICE "cosa%d: allocating resources failed\n", | |
617 | cosa->num); | |
618 | return err; | |
619 | } | |
620 | ||
621 | \f | |
622 | /*---------- SPPP/HDLC netdevice ---------- */ | |
623 | ||
624 | static void cosa_setup(struct net_device *d) | |
625 | { | |
626 | d->open = cosa_sppp_open; | |
627 | d->stop = cosa_sppp_close; | |
628 | d->hard_start_xmit = cosa_sppp_tx; | |
629 | d->do_ioctl = cosa_sppp_ioctl; | |
630 | d->get_stats = cosa_net_stats; | |
631 | d->tx_timeout = cosa_sppp_timeout; | |
632 | d->watchdog_timeo = TX_TIMEOUT; | |
633 | } | |
634 | ||
635 | static void sppp_channel_init(struct channel_data *chan) | |
636 | { | |
637 | struct net_device *d; | |
638 | chan->if_ptr = &chan->pppdev; | |
639 | d = alloc_netdev(0, chan->name, cosa_setup); | |
640 | if (!d) { | |
641 | printk(KERN_WARNING "%s: alloc_netdev failed.\n", chan->name); | |
642 | return; | |
643 | } | |
644 | chan->pppdev.dev = d; | |
645 | d->base_addr = chan->cosa->datareg; | |
646 | d->irq = chan->cosa->irq; | |
647 | d->dma = chan->cosa->dma; | |
648 | d->priv = chan; | |
649 | sppp_attach(&chan->pppdev); | |
650 | if (register_netdev(d)) { | |
651 | printk(KERN_WARNING "%s: register_netdev failed.\n", d->name); | |
652 | sppp_detach(d); | |
653 | free_netdev(d); | |
654 | chan->pppdev.dev = NULL; | |
655 | return; | |
656 | } | |
657 | } | |
658 | ||
659 | static void sppp_channel_delete(struct channel_data *chan) | |
660 | { | |
661 | unregister_netdev(chan->pppdev.dev); | |
662 | sppp_detach(chan->pppdev.dev); | |
663 | free_netdev(chan->pppdev.dev); | |
664 | chan->pppdev.dev = NULL; | |
665 | } | |
666 | ||
667 | static int cosa_sppp_open(struct net_device *d) | |
668 | { | |
669 | struct channel_data *chan = d->priv; | |
670 | int err; | |
671 | unsigned long flags; | |
672 | ||
673 | if (!(chan->cosa->firmware_status & COSA_FW_START)) { | |
674 | printk(KERN_NOTICE "%s: start the firmware first (status %d)\n", | |
675 | chan->cosa->name, chan->cosa->firmware_status); | |
676 | return -EPERM; | |
677 | } | |
678 | spin_lock_irqsave(&chan->cosa->lock, flags); | |
679 | if (chan->usage != 0) { | |
680 | printk(KERN_WARNING "%s: sppp_open called with usage count %d\n", | |
681 | chan->name, chan->usage); | |
682 | spin_unlock_irqrestore(&chan->cosa->lock, flags); | |
683 | return -EBUSY; | |
684 | } | |
685 | chan->setup_rx = sppp_setup_rx; | |
686 | chan->tx_done = sppp_tx_done; | |
687 | chan->rx_done = sppp_rx_done; | |
688 | chan->usage=-1; | |
689 | chan->cosa->usage++; | |
690 | spin_unlock_irqrestore(&chan->cosa->lock, flags); | |
691 | ||
692 | err = sppp_open(d); | |
693 | if (err) { | |
694 | spin_lock_irqsave(&chan->cosa->lock, flags); | |
695 | chan->usage=0; | |
696 | chan->cosa->usage--; | |
697 | ||
698 | spin_unlock_irqrestore(&chan->cosa->lock, flags); | |
699 | return err; | |
700 | } | |
701 | ||
702 | netif_start_queue(d); | |
703 | cosa_enable_rx(chan); | |
704 | return 0; | |
705 | } | |
706 | ||
707 | static int cosa_sppp_tx(struct sk_buff *skb, struct net_device *dev) | |
708 | { | |
709 | struct channel_data *chan = dev->priv; | |
710 | ||
711 | netif_stop_queue(dev); | |
712 | ||
713 | chan->tx_skb = skb; | |
714 | cosa_start_tx(chan, skb->data, skb->len); | |
715 | return 0; | |
716 | } | |
717 | ||
718 | static void cosa_sppp_timeout(struct net_device *dev) | |
719 | { | |
720 | struct channel_data *chan = dev->priv; | |
721 | ||
722 | if (test_bit(RXBIT, &chan->cosa->rxtx)) { | |
723 | chan->stats.rx_errors++; | |
724 | chan->stats.rx_missed_errors++; | |
725 | } else { | |
726 | chan->stats.tx_errors++; | |
727 | chan->stats.tx_aborted_errors++; | |
728 | } | |
729 | cosa_kick(chan->cosa); | |
730 | if (chan->tx_skb) { | |
731 | dev_kfree_skb(chan->tx_skb); | |
732 | chan->tx_skb = NULL; | |
733 | } | |
734 | netif_wake_queue(dev); | |
735 | } | |
736 | ||
737 | static int cosa_sppp_close(struct net_device *d) | |
738 | { | |
739 | struct channel_data *chan = d->priv; | |
740 | unsigned long flags; | |
741 | ||
742 | netif_stop_queue(d); | |
743 | sppp_close(d); | |
744 | cosa_disable_rx(chan); | |
745 | spin_lock_irqsave(&chan->cosa->lock, flags); | |
746 | if (chan->rx_skb) { | |
747 | kfree_skb(chan->rx_skb); | |
748 | chan->rx_skb = NULL; | |
749 | } | |
750 | if (chan->tx_skb) { | |
751 | kfree_skb(chan->tx_skb); | |
752 | chan->tx_skb = NULL; | |
753 | } | |
754 | chan->usage=0; | |
755 | chan->cosa->usage--; | |
756 | spin_unlock_irqrestore(&chan->cosa->lock, flags); | |
757 | return 0; | |
758 | } | |
759 | ||
760 | static char *sppp_setup_rx(struct channel_data *chan, int size) | |
761 | { | |
762 | /* | |
763 | * We can safely fall back to non-dma-able memory, because we have | |
764 | * the cosa->bouncebuf pre-allocated. | |
765 | */ | |
766 | if (chan->rx_skb) | |
767 | kfree_skb(chan->rx_skb); | |
768 | chan->rx_skb = dev_alloc_skb(size); | |
769 | if (chan->rx_skb == NULL) { | |
770 | printk(KERN_NOTICE "%s: Memory squeeze, dropping packet\n", | |
771 | chan->name); | |
772 | chan->stats.rx_dropped++; | |
773 | return NULL; | |
774 | } | |
775 | chan->pppdev.dev->trans_start = jiffies; | |
776 | return skb_put(chan->rx_skb, size); | |
777 | } | |
778 | ||
779 | static int sppp_rx_done(struct channel_data *chan) | |
780 | { | |
781 | if (!chan->rx_skb) { | |
782 | printk(KERN_WARNING "%s: rx_done with empty skb!\n", | |
783 | chan->name); | |
784 | chan->stats.rx_errors++; | |
785 | chan->stats.rx_frame_errors++; | |
786 | return 0; | |
787 | } | |
788 | chan->rx_skb->protocol = htons(ETH_P_WAN_PPP); | |
789 | chan->rx_skb->dev = chan->pppdev.dev; | |
790 | chan->rx_skb->mac.raw = chan->rx_skb->data; | |
791 | chan->stats.rx_packets++; | |
792 | chan->stats.rx_bytes += chan->cosa->rxsize; | |
793 | netif_rx(chan->rx_skb); | |
794 | chan->rx_skb = NULL; | |
795 | chan->pppdev.dev->last_rx = jiffies; | |
796 | return 0; | |
797 | } | |
798 | ||
799 | /* ARGSUSED */ | |
800 | static int sppp_tx_done(struct channel_data *chan, int size) | |
801 | { | |
802 | if (!chan->tx_skb) { | |
803 | printk(KERN_WARNING "%s: tx_done with empty skb!\n", | |
804 | chan->name); | |
805 | chan->stats.tx_errors++; | |
806 | chan->stats.tx_aborted_errors++; | |
807 | return 1; | |
808 | } | |
809 | dev_kfree_skb_irq(chan->tx_skb); | |
810 | chan->tx_skb = NULL; | |
811 | chan->stats.tx_packets++; | |
812 | chan->stats.tx_bytes += size; | |
813 | netif_wake_queue(chan->pppdev.dev); | |
814 | return 1; | |
815 | } | |
816 | ||
817 | static struct net_device_stats *cosa_net_stats(struct net_device *dev) | |
818 | { | |
819 | struct channel_data *chan = dev->priv; | |
820 | return &chan->stats; | |
821 | } | |
822 | ||
823 | \f | |
824 | /*---------- Character device ---------- */ | |
825 | ||
826 | static void chardev_channel_init(struct channel_data *chan) | |
827 | { | |
828 | init_MUTEX(&chan->rsem); | |
829 | init_MUTEX(&chan->wsem); | |
830 | } | |
831 | ||
832 | static ssize_t cosa_read(struct file *file, | |
833 | char __user *buf, size_t count, loff_t *ppos) | |
834 | { | |
835 | DECLARE_WAITQUEUE(wait, current); | |
836 | unsigned long flags; | |
837 | struct channel_data *chan = file->private_data; | |
838 | struct cosa_data *cosa = chan->cosa; | |
839 | char *kbuf; | |
840 | ||
841 | if (!(cosa->firmware_status & COSA_FW_START)) { | |
842 | printk(KERN_NOTICE "%s: start the firmware first (status %d)\n", | |
843 | cosa->name, cosa->firmware_status); | |
844 | return -EPERM; | |
845 | } | |
846 | if (down_interruptible(&chan->rsem)) | |
847 | return -ERESTARTSYS; | |
848 | ||
849 | if ((chan->rxdata = kmalloc(COSA_MTU, GFP_DMA|GFP_KERNEL)) == NULL) { | |
850 | printk(KERN_INFO "%s: cosa_read() - OOM\n", cosa->name); | |
851 | up(&chan->rsem); | |
852 | return -ENOMEM; | |
853 | } | |
854 | ||
855 | chan->rx_status = 0; | |
856 | cosa_enable_rx(chan); | |
857 | spin_lock_irqsave(&cosa->lock, flags); | |
858 | add_wait_queue(&chan->rxwaitq, &wait); | |
859 | while(!chan->rx_status) { | |
860 | current->state = TASK_INTERRUPTIBLE; | |
861 | spin_unlock_irqrestore(&cosa->lock, flags); | |
862 | schedule(); | |
863 | spin_lock_irqsave(&cosa->lock, flags); | |
864 | if (signal_pending(current) && chan->rx_status == 0) { | |
865 | chan->rx_status = 1; | |
866 | remove_wait_queue(&chan->rxwaitq, &wait); | |
867 | current->state = TASK_RUNNING; | |
868 | spin_unlock_irqrestore(&cosa->lock, flags); | |
869 | up(&chan->rsem); | |
870 | return -ERESTARTSYS; | |
871 | } | |
872 | } | |
873 | remove_wait_queue(&chan->rxwaitq, &wait); | |
874 | current->state = TASK_RUNNING; | |
875 | kbuf = chan->rxdata; | |
876 | count = chan->rxsize; | |
877 | spin_unlock_irqrestore(&cosa->lock, flags); | |
878 | up(&chan->rsem); | |
879 | ||
880 | if (copy_to_user(buf, kbuf, count)) { | |
881 | kfree(kbuf); | |
882 | return -EFAULT; | |
883 | } | |
884 | kfree(kbuf); | |
885 | return count; | |
886 | } | |
887 | ||
888 | static char *chrdev_setup_rx(struct channel_data *chan, int size) | |
889 | { | |
890 | /* Expect size <= COSA_MTU */ | |
891 | chan->rxsize = size; | |
892 | return chan->rxdata; | |
893 | } | |
894 | ||
895 | static int chrdev_rx_done(struct channel_data *chan) | |
896 | { | |
897 | if (chan->rx_status) { /* Reader has died */ | |
898 | kfree(chan->rxdata); | |
899 | up(&chan->wsem); | |
900 | } | |
901 | chan->rx_status = 1; | |
902 | wake_up_interruptible(&chan->rxwaitq); | |
903 | return 1; | |
904 | } | |
905 | ||
906 | ||
907 | static ssize_t cosa_write(struct file *file, | |
908 | const char __user *buf, size_t count, loff_t *ppos) | |
909 | { | |
910 | DECLARE_WAITQUEUE(wait, current); | |
911 | struct channel_data *chan = file->private_data; | |
912 | struct cosa_data *cosa = chan->cosa; | |
913 | unsigned long flags; | |
914 | char *kbuf; | |
915 | ||
916 | if (!(cosa->firmware_status & COSA_FW_START)) { | |
917 | printk(KERN_NOTICE "%s: start the firmware first (status %d)\n", | |
918 | cosa->name, cosa->firmware_status); | |
919 | return -EPERM; | |
920 | } | |
921 | if (down_interruptible(&chan->wsem)) | |
922 | return -ERESTARTSYS; | |
923 | ||
924 | if (count > COSA_MTU) | |
925 | count = COSA_MTU; | |
926 | ||
927 | /* Allocate the buffer */ | |
928 | if ((kbuf = kmalloc(count, GFP_KERNEL|GFP_DMA)) == NULL) { | |
929 | printk(KERN_NOTICE "%s: cosa_write() OOM - dropping packet\n", | |
930 | cosa->name); | |
931 | up(&chan->wsem); | |
932 | return -ENOMEM; | |
933 | } | |
934 | if (copy_from_user(kbuf, buf, count)) { | |
935 | up(&chan->wsem); | |
936 | kfree(kbuf); | |
937 | return -EFAULT; | |
938 | } | |
939 | chan->tx_status=0; | |
940 | cosa_start_tx(chan, kbuf, count); | |
941 | ||
942 | spin_lock_irqsave(&cosa->lock, flags); | |
943 | add_wait_queue(&chan->txwaitq, &wait); | |
944 | while(!chan->tx_status) { | |
945 | current->state = TASK_INTERRUPTIBLE; | |
946 | spin_unlock_irqrestore(&cosa->lock, flags); | |
947 | schedule(); | |
948 | spin_lock_irqsave(&cosa->lock, flags); | |
949 | if (signal_pending(current) && chan->tx_status == 0) { | |
950 | chan->tx_status = 1; | |
951 | remove_wait_queue(&chan->txwaitq, &wait); | |
952 | current->state = TASK_RUNNING; | |
953 | chan->tx_status = 1; | |
954 | spin_unlock_irqrestore(&cosa->lock, flags); | |
955 | return -ERESTARTSYS; | |
956 | } | |
957 | } | |
958 | remove_wait_queue(&chan->txwaitq, &wait); | |
959 | current->state = TASK_RUNNING; | |
960 | up(&chan->wsem); | |
961 | spin_unlock_irqrestore(&cosa->lock, flags); | |
962 | kfree(kbuf); | |
963 | return count; | |
964 | } | |
965 | ||
966 | static int chrdev_tx_done(struct channel_data *chan, int size) | |
967 | { | |
968 | if (chan->tx_status) { /* Writer was interrupted */ | |
969 | kfree(chan->txbuf); | |
970 | up(&chan->wsem); | |
971 | } | |
972 | chan->tx_status = 1; | |
973 | wake_up_interruptible(&chan->txwaitq); | |
974 | return 1; | |
975 | } | |
976 | ||
977 | static unsigned int cosa_poll(struct file *file, poll_table *poll) | |
978 | { | |
979 | printk(KERN_INFO "cosa_poll is here\n"); | |
980 | return 0; | |
981 | } | |
982 | ||
983 | static int cosa_open(struct inode *inode, struct file *file) | |
984 | { | |
985 | struct cosa_data *cosa; | |
986 | struct channel_data *chan; | |
987 | unsigned long flags; | |
988 | int n; | |
989 | ||
990 | if ((n=iminor(file->f_dentry->d_inode)>>CARD_MINOR_BITS) | |
991 | >= nr_cards) | |
992 | return -ENODEV; | |
993 | cosa = cosa_cards+n; | |
994 | ||
995 | if ((n=iminor(file->f_dentry->d_inode) | |
996 | & ((1<<CARD_MINOR_BITS)-1)) >= cosa->nchannels) | |
997 | return -ENODEV; | |
998 | chan = cosa->chan + n; | |
999 | ||
1000 | file->private_data = chan; | |
1001 | ||
1002 | spin_lock_irqsave(&cosa->lock, flags); | |
1003 | ||
1004 | if (chan->usage < 0) { /* in netdev mode */ | |
1005 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1006 | return -EBUSY; | |
1007 | } | |
1008 | cosa->usage++; | |
1009 | chan->usage++; | |
1010 | ||
1011 | chan->tx_done = chrdev_tx_done; | |
1012 | chan->setup_rx = chrdev_setup_rx; | |
1013 | chan->rx_done = chrdev_rx_done; | |
1014 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1015 | return 0; | |
1016 | } | |
1017 | ||
1018 | static int cosa_release(struct inode *inode, struct file *file) | |
1019 | { | |
1020 | struct channel_data *channel = file->private_data; | |
1021 | struct cosa_data *cosa; | |
1022 | unsigned long flags; | |
1023 | ||
1024 | cosa = channel->cosa; | |
1025 | spin_lock_irqsave(&cosa->lock, flags); | |
1026 | cosa->usage--; | |
1027 | channel->usage--; | |
1028 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1029 | return 0; | |
1030 | } | |
1031 | ||
1032 | #ifdef COSA_FASYNC_WORKING | |
1033 | static struct fasync_struct *fasync[256] = { NULL, }; | |
1034 | ||
1035 | /* To be done ... */ | |
1036 | static int cosa_fasync(struct inode *inode, struct file *file, int on) | |
1037 | { | |
1038 | int port = iminor(inode); | |
1039 | int rv = fasync_helper(inode, file, on, &fasync[port]); | |
1040 | return rv < 0 ? rv : 0; | |
1041 | } | |
1042 | #endif | |
1043 | ||
1044 | \f | |
1045 | /* ---------- Ioctls ---------- */ | |
1046 | ||
1047 | /* | |
1048 | * Ioctl subroutines can safely be made inline, because they are called | |
1049 | * only from cosa_ioctl(). | |
1050 | */ | |
1051 | static inline int cosa_reset(struct cosa_data *cosa) | |
1052 | { | |
1053 | char idstring[COSA_MAX_ID_STRING]; | |
1054 | if (cosa->usage > 1) | |
1055 | printk(KERN_INFO "cosa%d: WARNING: reset requested with cosa->usage > 1 (%d). Odd things may happen.\n", | |
1056 | cosa->num, cosa->usage); | |
1057 | cosa->firmware_status &= ~(COSA_FW_RESET|COSA_FW_START); | |
1058 | if (cosa_reset_and_read_id(cosa, idstring) < 0) { | |
1059 | printk(KERN_NOTICE "cosa%d: reset failed\n", cosa->num); | |
1060 | return -EIO; | |
1061 | } | |
1062 | printk(KERN_INFO "cosa%d: resetting device: %s\n", cosa->num, | |
1063 | idstring); | |
1064 | cosa->firmware_status |= COSA_FW_RESET; | |
1065 | return 0; | |
1066 | } | |
1067 | ||
1068 | /* High-level function to download data into COSA memory. Calls download() */ | |
1069 | static inline int cosa_download(struct cosa_data *cosa, void __user *arg) | |
1070 | { | |
1071 | struct cosa_download d; | |
1072 | int i; | |
1073 | ||
1074 | if (cosa->usage > 1) | |
1075 | printk(KERN_INFO "%s: WARNING: download of microcode requested with cosa->usage > 1 (%d). Odd things may happen.\n", | |
1076 | cosa->name, cosa->usage); | |
1077 | if (!(cosa->firmware_status & COSA_FW_RESET)) { | |
1078 | printk(KERN_NOTICE "%s: reset the card first (status %d).\n", | |
1079 | cosa->name, cosa->firmware_status); | |
1080 | return -EPERM; | |
1081 | } | |
1082 | ||
1083 | if (copy_from_user(&d, arg, sizeof(d))) | |
1084 | return -EFAULT; | |
1085 | ||
1086 | if (d.addr < 0 || d.addr > COSA_MAX_FIRMWARE_SIZE) | |
1087 | return -EINVAL; | |
1088 | if (d.len < 0 || d.len > COSA_MAX_FIRMWARE_SIZE) | |
1089 | return -EINVAL; | |
1090 | ||
1091 | ||
1092 | /* If something fails, force the user to reset the card */ | |
1093 | cosa->firmware_status &= ~(COSA_FW_RESET|COSA_FW_DOWNLOAD); | |
1094 | ||
1095 | i = download(cosa, d.code, d.len, d.addr); | |
1096 | if (i < 0) { | |
1097 | printk(KERN_NOTICE "cosa%d: microcode download failed: %d\n", | |
1098 | cosa->num, i); | |
1099 | return -EIO; | |
1100 | } | |
1101 | printk(KERN_INFO "cosa%d: downloading microcode - 0x%04x bytes at 0x%04x\n", | |
1102 | cosa->num, d.len, d.addr); | |
1103 | cosa->firmware_status |= COSA_FW_RESET|COSA_FW_DOWNLOAD; | |
1104 | return 0; | |
1105 | } | |
1106 | ||
1107 | /* High-level function to read COSA memory. Calls readmem() */ | |
1108 | static inline int cosa_readmem(struct cosa_data *cosa, void __user *arg) | |
1109 | { | |
1110 | struct cosa_download d; | |
1111 | int i; | |
1112 | ||
1113 | if (cosa->usage > 1) | |
1114 | printk(KERN_INFO "cosa%d: WARNING: readmem requested with " | |
1115 | "cosa->usage > 1 (%d). Odd things may happen.\n", | |
1116 | cosa->num, cosa->usage); | |
1117 | if (!(cosa->firmware_status & COSA_FW_RESET)) { | |
1118 | printk(KERN_NOTICE "%s: reset the card first (status %d).\n", | |
1119 | cosa->name, cosa->firmware_status); | |
1120 | return -EPERM; | |
1121 | } | |
1122 | ||
1123 | if (copy_from_user(&d, arg, sizeof(d))) | |
1124 | return -EFAULT; | |
1125 | ||
1126 | /* If something fails, force the user to reset the card */ | |
1127 | cosa->firmware_status &= ~COSA_FW_RESET; | |
1128 | ||
1129 | i = readmem(cosa, d.code, d.len, d.addr); | |
1130 | if (i < 0) { | |
1131 | printk(KERN_NOTICE "cosa%d: reading memory failed: %d\n", | |
1132 | cosa->num, i); | |
1133 | return -EIO; | |
1134 | } | |
1135 | printk(KERN_INFO "cosa%d: reading card memory - 0x%04x bytes at 0x%04x\n", | |
1136 | cosa->num, d.len, d.addr); | |
1137 | cosa->firmware_status |= COSA_FW_RESET; | |
1138 | return 0; | |
1139 | } | |
1140 | ||
1141 | /* High-level function to start microcode. Calls startmicrocode(). */ | |
1142 | static inline int cosa_start(struct cosa_data *cosa, int address) | |
1143 | { | |
1144 | int i; | |
1145 | ||
1146 | if (cosa->usage > 1) | |
1147 | printk(KERN_INFO "cosa%d: WARNING: start microcode requested with cosa->usage > 1 (%d). Odd things may happen.\n", | |
1148 | cosa->num, cosa->usage); | |
1149 | ||
1150 | if ((cosa->firmware_status & (COSA_FW_RESET|COSA_FW_DOWNLOAD)) | |
1151 | != (COSA_FW_RESET|COSA_FW_DOWNLOAD)) { | |
1152 | printk(KERN_NOTICE "%s: download the microcode and/or reset the card first (status %d).\n", | |
1153 | cosa->name, cosa->firmware_status); | |
1154 | return -EPERM; | |
1155 | } | |
1156 | cosa->firmware_status &= ~COSA_FW_RESET; | |
1157 | if ((i=startmicrocode(cosa, address)) < 0) { | |
1158 | printk(KERN_NOTICE "cosa%d: start microcode at 0x%04x failed: %d\n", | |
1159 | cosa->num, address, i); | |
1160 | return -EIO; | |
1161 | } | |
1162 | printk(KERN_INFO "cosa%d: starting microcode at 0x%04x\n", | |
1163 | cosa->num, address); | |
1164 | cosa->startaddr = address; | |
1165 | cosa->firmware_status |= COSA_FW_START; | |
1166 | return 0; | |
1167 | } | |
1168 | ||
1169 | /* Buffer of size at least COSA_MAX_ID_STRING is expected */ | |
1170 | static inline int cosa_getidstr(struct cosa_data *cosa, char __user *string) | |
1171 | { | |
1172 | int l = strlen(cosa->id_string)+1; | |
1173 | if (copy_to_user(string, cosa->id_string, l)) | |
1174 | return -EFAULT; | |
1175 | return l; | |
1176 | } | |
1177 | ||
1178 | /* Buffer of size at least COSA_MAX_ID_STRING is expected */ | |
1179 | static inline int cosa_gettype(struct cosa_data *cosa, char __user *string) | |
1180 | { | |
1181 | int l = strlen(cosa->type)+1; | |
1182 | if (copy_to_user(string, cosa->type, l)) | |
1183 | return -EFAULT; | |
1184 | return l; | |
1185 | } | |
1186 | ||
1187 | static int cosa_ioctl_common(struct cosa_data *cosa, | |
1188 | struct channel_data *channel, unsigned int cmd, unsigned long arg) | |
1189 | { | |
1190 | void __user *argp = (void __user *)arg; | |
1191 | switch(cmd) { | |
1192 | case COSAIORSET: /* Reset the device */ | |
1193 | if (!capable(CAP_NET_ADMIN)) | |
1194 | return -EACCES; | |
1195 | return cosa_reset(cosa); | |
1196 | case COSAIOSTRT: /* Start the firmware */ | |
1197 | if (!capable(CAP_SYS_RAWIO)) | |
1198 | return -EACCES; | |
1199 | return cosa_start(cosa, arg); | |
1200 | case COSAIODOWNLD: /* Download the firmware */ | |
1201 | if (!capable(CAP_SYS_RAWIO)) | |
1202 | return -EACCES; | |
1203 | ||
1204 | return cosa_download(cosa, argp); | |
1205 | case COSAIORMEM: | |
1206 | if (!capable(CAP_SYS_RAWIO)) | |
1207 | return -EACCES; | |
1208 | return cosa_readmem(cosa, argp); | |
1209 | case COSAIORTYPE: | |
1210 | return cosa_gettype(cosa, argp); | |
1211 | case COSAIORIDSTR: | |
1212 | return cosa_getidstr(cosa, argp); | |
1213 | case COSAIONRCARDS: | |
1214 | return nr_cards; | |
1215 | case COSAIONRCHANS: | |
1216 | return cosa->nchannels; | |
1217 | case COSAIOBMSET: | |
1218 | if (!capable(CAP_SYS_RAWIO)) | |
1219 | return -EACCES; | |
1220 | if (is_8bit(cosa)) | |
1221 | return -EINVAL; | |
1222 | if (arg != COSA_BM_OFF && arg != COSA_BM_ON) | |
1223 | return -EINVAL; | |
1224 | cosa->busmaster = arg; | |
1225 | return 0; | |
1226 | case COSAIOBMGET: | |
1227 | return cosa->busmaster; | |
1228 | } | |
1229 | return -ENOIOCTLCMD; | |
1230 | } | |
1231 | ||
1232 | static int cosa_sppp_ioctl(struct net_device *dev, struct ifreq *ifr, | |
1233 | int cmd) | |
1234 | { | |
1235 | int rv; | |
1236 | struct channel_data *chan = dev->priv; | |
1237 | rv = cosa_ioctl_common(chan->cosa, chan, cmd, (unsigned long)ifr->ifr_data); | |
1238 | if (rv == -ENOIOCTLCMD) { | |
1239 | return sppp_do_ioctl(dev, ifr, cmd); | |
1240 | } | |
1241 | return rv; | |
1242 | } | |
1243 | ||
1244 | static int cosa_chardev_ioctl(struct inode *inode, struct file *file, | |
1245 | unsigned int cmd, unsigned long arg) | |
1246 | { | |
1247 | struct channel_data *channel = file->private_data; | |
1248 | struct cosa_data *cosa = channel->cosa; | |
1249 | return cosa_ioctl_common(cosa, channel, cmd, arg); | |
1250 | } | |
1251 | ||
1252 | \f | |
1253 | /*---------- HW layer interface ---------- */ | |
1254 | ||
1255 | /* | |
1256 | * The higher layer can bind itself to the HW layer by setting the callbacks | |
1257 | * in the channel_data structure and by using these routines. | |
1258 | */ | |
1259 | static void cosa_enable_rx(struct channel_data *chan) | |
1260 | { | |
1261 | struct cosa_data *cosa = chan->cosa; | |
1262 | ||
1263 | if (!test_and_set_bit(chan->num, &cosa->rxbitmap)) | |
1264 | put_driver_status(cosa); | |
1265 | } | |
1266 | ||
1267 | static void cosa_disable_rx(struct channel_data *chan) | |
1268 | { | |
1269 | struct cosa_data *cosa = chan->cosa; | |
1270 | ||
1271 | if (test_and_clear_bit(chan->num, &cosa->rxbitmap)) | |
1272 | put_driver_status(cosa); | |
1273 | } | |
1274 | ||
1275 | /* | |
1276 | * FIXME: This routine probably should check for cosa_start_tx() called when | |
1277 | * the previous transmit is still unfinished. In this case the non-zero | |
1278 | * return value should indicate to the caller that the queuing(sp?) up | |
1279 | * the transmit has failed. | |
1280 | */ | |
1281 | static int cosa_start_tx(struct channel_data *chan, char *buf, int len) | |
1282 | { | |
1283 | struct cosa_data *cosa = chan->cosa; | |
1284 | unsigned long flags; | |
1285 | #ifdef DEBUG_DATA | |
1286 | int i; | |
1287 | ||
1288 | printk(KERN_INFO "cosa%dc%d: starting tx(0x%x)", chan->cosa->num, | |
1289 | chan->num, len); | |
1290 | for (i=0; i<len; i++) | |
1291 | printk(" %02x", buf[i]&0xff); | |
1292 | printk("\n"); | |
1293 | #endif | |
1294 | spin_lock_irqsave(&cosa->lock, flags); | |
1295 | chan->txbuf = buf; | |
1296 | chan->txsize = len; | |
1297 | if (len > COSA_MTU) | |
1298 | chan->txsize = COSA_MTU; | |
1299 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1300 | ||
1301 | /* Tell the firmware we are ready */ | |
1302 | set_bit(chan->num, &cosa->txbitmap); | |
1303 | put_driver_status(cosa); | |
1304 | ||
1305 | return 0; | |
1306 | } | |
1307 | ||
1308 | static void put_driver_status(struct cosa_data *cosa) | |
1309 | { | |
1310 | unsigned long flags; | |
1311 | int status; | |
1312 | ||
1313 | spin_lock_irqsave(&cosa->lock, flags); | |
1314 | ||
1315 | status = (cosa->rxbitmap ? DRIVER_RX_READY : 0) | |
1316 | | (cosa->txbitmap ? DRIVER_TX_READY : 0) | |
1317 | | (cosa->txbitmap? ~(cosa->txbitmap<<DRIVER_TXMAP_SHIFT) | |
1318 | &DRIVER_TXMAP_MASK : 0); | |
1319 | if (!cosa->rxtx) { | |
1320 | if (cosa->rxbitmap|cosa->txbitmap) { | |
1321 | if (!cosa->enabled) { | |
1322 | cosa_putstatus(cosa, SR_RX_INT_ENA); | |
1323 | #ifdef DEBUG_IO | |
1324 | debug_status_out(cosa, SR_RX_INT_ENA); | |
1325 | #endif | |
1326 | cosa->enabled = 1; | |
1327 | } | |
1328 | } else if (cosa->enabled) { | |
1329 | cosa->enabled = 0; | |
1330 | cosa_putstatus(cosa, 0); | |
1331 | #ifdef DEBUG_IO | |
1332 | debug_status_out(cosa, 0); | |
1333 | #endif | |
1334 | } | |
1335 | cosa_putdata8(cosa, status); | |
1336 | #ifdef DEBUG_IO | |
1337 | debug_data_cmd(cosa, status); | |
1338 | #endif | |
1339 | } | |
1340 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1341 | } | |
1342 | ||
1343 | static void put_driver_status_nolock(struct cosa_data *cosa) | |
1344 | { | |
1345 | int status; | |
1346 | ||
1347 | status = (cosa->rxbitmap ? DRIVER_RX_READY : 0) | |
1348 | | (cosa->txbitmap ? DRIVER_TX_READY : 0) | |
1349 | | (cosa->txbitmap? ~(cosa->txbitmap<<DRIVER_TXMAP_SHIFT) | |
1350 | &DRIVER_TXMAP_MASK : 0); | |
1351 | ||
1352 | if (cosa->rxbitmap|cosa->txbitmap) { | |
1353 | cosa_putstatus(cosa, SR_RX_INT_ENA); | |
1354 | #ifdef DEBUG_IO | |
1355 | debug_status_out(cosa, SR_RX_INT_ENA); | |
1356 | #endif | |
1357 | cosa->enabled = 1; | |
1358 | } else { | |
1359 | cosa_putstatus(cosa, 0); | |
1360 | #ifdef DEBUG_IO | |
1361 | debug_status_out(cosa, 0); | |
1362 | #endif | |
1363 | cosa->enabled = 0; | |
1364 | } | |
1365 | cosa_putdata8(cosa, status); | |
1366 | #ifdef DEBUG_IO | |
1367 | debug_data_cmd(cosa, status); | |
1368 | #endif | |
1369 | } | |
1370 | ||
1371 | /* | |
1372 | * The "kickme" function: When the DMA times out, this is called to | |
1373 | * clean up the driver status. | |
1374 | * FIXME: Preliminary support, the interface is probably wrong. | |
1375 | */ | |
1376 | static void cosa_kick(struct cosa_data *cosa) | |
1377 | { | |
1378 | unsigned long flags, flags1; | |
1379 | char *s = "(probably) IRQ"; | |
1380 | ||
1381 | if (test_bit(RXBIT, &cosa->rxtx)) | |
1382 | s = "RX DMA"; | |
1383 | if (test_bit(TXBIT, &cosa->rxtx)) | |
1384 | s = "TX DMA"; | |
1385 | ||
1386 | printk(KERN_INFO "%s: %s timeout - restarting.\n", cosa->name, s); | |
1387 | spin_lock_irqsave(&cosa->lock, flags); | |
1388 | cosa->rxtx = 0; | |
1389 | ||
1390 | flags1 = claim_dma_lock(); | |
1391 | disable_dma(cosa->dma); | |
1392 | clear_dma_ff(cosa->dma); | |
1393 | release_dma_lock(flags1); | |
1394 | ||
1395 | /* FIXME: Anything else? */ | |
1396 | udelay(100); | |
1397 | cosa_putstatus(cosa, 0); | |
1398 | udelay(100); | |
1399 | (void) cosa_getdata8(cosa); | |
1400 | udelay(100); | |
1401 | cosa_putdata8(cosa, 0); | |
1402 | udelay(100); | |
1403 | put_driver_status_nolock(cosa); | |
1404 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1405 | } | |
1406 | ||
1407 | /* | |
1408 | * Check if the whole buffer is DMA-able. It means it is below the 16M of | |
1409 | * physical memory and doesn't span the 64k boundary. For now it seems | |
1410 | * SKB's never do this, but we'll check this anyway. | |
1411 | */ | |
1412 | static int cosa_dma_able(struct channel_data *chan, char *buf, int len) | |
1413 | { | |
1414 | static int count; | |
1415 | unsigned long b = (unsigned long)buf; | |
1416 | if (b+len >= MAX_DMA_ADDRESS) | |
1417 | return 0; | |
1418 | if ((b^ (b+len)) & 0x10000) { | |
1419 | if (count++ < 5) | |
1420 | printk(KERN_INFO "%s: packet spanning a 64k boundary\n", | |
1421 | chan->name); | |
1422 | return 0; | |
1423 | } | |
1424 | return 1; | |
1425 | } | |
1426 | ||
1427 | \f | |
1428 | /* ---------- The SRP/COSA ROM monitor functions ---------- */ | |
1429 | ||
1430 | /* | |
1431 | * Downloading SRP microcode: say "w" to SRP monitor, it answers by "w=", | |
1432 | * drivers need to say 4-digit hex number meaning start address of the microcode | |
1433 | * separated by a single space. Monitor replies by saying " =". Now driver | |
1434 | * has to write 4-digit hex number meaning the last byte address ended | |
1435 | * by a single space. Monitor has to reply with a space. Now the download | |
1436 | * begins. After the download monitor replies with "\r\n." (CR LF dot). | |
1437 | */ | |
1438 | static int download(struct cosa_data *cosa, const char __user *microcode, int length, int address) | |
1439 | { | |
1440 | int i; | |
1441 | ||
1442 | if (put_wait_data(cosa, 'w') == -1) return -1; | |
1443 | if ((i=get_wait_data(cosa)) != 'w') { printk("dnld: 0x%04x\n",i); return -2;} | |
1444 | if (get_wait_data(cosa) != '=') return -3; | |
1445 | ||
1446 | if (puthexnumber(cosa, address) < 0) return -4; | |
1447 | if (put_wait_data(cosa, ' ') == -1) return -10; | |
1448 | if (get_wait_data(cosa) != ' ') return -11; | |
1449 | if (get_wait_data(cosa) != '=') return -12; | |
1450 | ||
1451 | if (puthexnumber(cosa, address+length-1) < 0) return -13; | |
1452 | if (put_wait_data(cosa, ' ') == -1) return -18; | |
1453 | if (get_wait_data(cosa) != ' ') return -19; | |
1454 | ||
1455 | while (length--) { | |
1456 | char c; | |
1457 | #ifndef SRP_DOWNLOAD_AT_BOOT | |
1458 | if (get_user(c, microcode)) | |
1459 | return -23; /* ??? */ | |
1460 | #else | |
1461 | c = *microcode; | |
1462 | #endif | |
1463 | if (put_wait_data(cosa, c) == -1) | |
1464 | return -20; | |
1465 | microcode++; | |
1466 | } | |
1467 | ||
1468 | if (get_wait_data(cosa) != '\r') return -21; | |
1469 | if (get_wait_data(cosa) != '\n') return -22; | |
1470 | if (get_wait_data(cosa) != '.') return -23; | |
1471 | #if 0 | |
1472 | printk(KERN_DEBUG "cosa%d: download completed.\n", cosa->num); | |
1473 | #endif | |
1474 | return 0; | |
1475 | } | |
1476 | ||
1477 | ||
1478 | /* | |
1479 | * Starting microcode is done via the "g" command of the SRP monitor. | |
1480 | * The chat should be the following: "g" "g=" "<addr><CR>" | |
1481 | * "<CR><CR><LF><CR><LF>". | |
1482 | */ | |
1483 | static int startmicrocode(struct cosa_data *cosa, int address) | |
1484 | { | |
1485 | if (put_wait_data(cosa, 'g') == -1) return -1; | |
1486 | if (get_wait_data(cosa) != 'g') return -2; | |
1487 | if (get_wait_data(cosa) != '=') return -3; | |
1488 | ||
1489 | if (puthexnumber(cosa, address) < 0) return -4; | |
1490 | if (put_wait_data(cosa, '\r') == -1) return -5; | |
1491 | ||
1492 | if (get_wait_data(cosa) != '\r') return -6; | |
1493 | if (get_wait_data(cosa) != '\r') return -7; | |
1494 | if (get_wait_data(cosa) != '\n') return -8; | |
1495 | if (get_wait_data(cosa) != '\r') return -9; | |
1496 | if (get_wait_data(cosa) != '\n') return -10; | |
1497 | #if 0 | |
1498 | printk(KERN_DEBUG "cosa%d: microcode started\n", cosa->num); | |
1499 | #endif | |
1500 | return 0; | |
1501 | } | |
1502 | ||
1503 | /* | |
1504 | * Reading memory is done via the "r" command of the SRP monitor. | |
1505 | * The chat is the following "r" "r=" "<addr> " " =" "<last_byte> " " " | |
1506 | * Then driver can read the data and the conversation is finished | |
1507 | * by SRP monitor sending "<CR><LF>." (dot at the end). | |
1508 | * | |
1509 | * This routine is not needed during the normal operation and serves | |
1510 | * for debugging purposes only. | |
1511 | */ | |
1512 | static int readmem(struct cosa_data *cosa, char __user *microcode, int length, int address) | |
1513 | { | |
1514 | if (put_wait_data(cosa, 'r') == -1) return -1; | |
1515 | if ((get_wait_data(cosa)) != 'r') return -2; | |
1516 | if ((get_wait_data(cosa)) != '=') return -3; | |
1517 | ||
1518 | if (puthexnumber(cosa, address) < 0) return -4; | |
1519 | if (put_wait_data(cosa, ' ') == -1) return -5; | |
1520 | if (get_wait_data(cosa) != ' ') return -6; | |
1521 | if (get_wait_data(cosa) != '=') return -7; | |
1522 | ||
1523 | if (puthexnumber(cosa, address+length-1) < 0) return -8; | |
1524 | if (put_wait_data(cosa, ' ') == -1) return -9; | |
1525 | if (get_wait_data(cosa) != ' ') return -10; | |
1526 | ||
1527 | while (length--) { | |
1528 | char c; | |
1529 | int i; | |
1530 | if ((i=get_wait_data(cosa)) == -1) { | |
1531 | printk (KERN_INFO "cosa: 0x%04x bytes remaining\n", | |
1532 | length); | |
1533 | return -11; | |
1534 | } | |
1535 | c=i; | |
1536 | #if 1 | |
1537 | if (put_user(c, microcode)) | |
1538 | return -23; /* ??? */ | |
1539 | #else | |
1540 | *microcode = c; | |
1541 | #endif | |
1542 | microcode++; | |
1543 | } | |
1544 | ||
1545 | if (get_wait_data(cosa) != '\r') return -21; | |
1546 | if (get_wait_data(cosa) != '\n') return -22; | |
1547 | if (get_wait_data(cosa) != '.') return -23; | |
1548 | #if 0 | |
1549 | printk(KERN_DEBUG "cosa%d: readmem completed.\n", cosa->num); | |
1550 | #endif | |
1551 | return 0; | |
1552 | } | |
1553 | ||
1554 | /* | |
1555 | * This function resets the device and reads the initial prompt | |
1556 | * of the device's ROM monitor. | |
1557 | */ | |
1558 | static int cosa_reset_and_read_id(struct cosa_data *cosa, char *idstring) | |
1559 | { | |
1560 | int i=0, id=0, prev=0, curr=0; | |
1561 | ||
1562 | /* Reset the card ... */ | |
1563 | cosa_putstatus(cosa, 0); | |
1564 | cosa_getdata8(cosa); | |
1565 | cosa_putstatus(cosa, SR_RST); | |
1566 | #ifdef MODULE | |
1567 | msleep(500); | |
1568 | #else | |
1569 | udelay(5*100000); | |
1570 | #endif | |
1571 | /* Disable all IRQs from the card */ | |
1572 | cosa_putstatus(cosa, 0); | |
1573 | ||
1574 | /* | |
1575 | * Try to read the ID string. The card then prints out the | |
1576 | * identification string ended by the "\n\x2e". | |
1577 | * | |
1578 | * The following loop is indexed through i (instead of id) | |
1579 | * to avoid looping forever when for any reason | |
1580 | * the port returns '\r', '\n' or '\x2e' permanently. | |
1581 | */ | |
1582 | for (i=0; i<COSA_MAX_ID_STRING-1; i++, prev=curr) { | |
1583 | if ((curr = get_wait_data(cosa)) == -1) { | |
1584 | return -1; | |
1585 | } | |
1586 | curr &= 0xff; | |
1587 | if (curr != '\r' && curr != '\n' && curr != 0x2e) | |
1588 | idstring[id++] = curr; | |
1589 | if (curr == 0x2e && prev == '\n') | |
1590 | break; | |
1591 | } | |
1592 | /* Perhaps we should fail when i==COSA_MAX_ID_STRING-1 ? */ | |
1593 | idstring[id] = '\0'; | |
1594 | return id; | |
1595 | } | |
1596 | ||
1597 | \f | |
1598 | /* ---------- Auxiliary routines for COSA/SRP monitor ---------- */ | |
1599 | ||
1600 | /* | |
1601 | * This routine gets the data byte from the card waiting for the SR_RX_RDY | |
1602 | * bit to be set in a loop. It should be used in the exceptional cases | |
1603 | * only (for example when resetting the card or downloading the firmware. | |
1604 | */ | |
1605 | static int get_wait_data(struct cosa_data *cosa) | |
1606 | { | |
1607 | int retries = 1000; | |
1608 | ||
1609 | while (--retries) { | |
1610 | /* read data and return them */ | |
1611 | if (cosa_getstatus(cosa) & SR_RX_RDY) { | |
1612 | short r; | |
1613 | r = cosa_getdata8(cosa); | |
1614 | #if 0 | |
1615 | printk(KERN_INFO "cosa: get_wait_data returning after %d retries\n", 999-retries); | |
1616 | #endif | |
1617 | return r; | |
1618 | } | |
1619 | /* sleep if not ready to read */ | |
1620 | set_current_state(TASK_INTERRUPTIBLE); | |
1621 | schedule_timeout(1); | |
1622 | } | |
1623 | printk(KERN_INFO "cosa: timeout in get_wait_data (status 0x%x)\n", | |
1624 | cosa_getstatus(cosa)); | |
1625 | return -1; | |
1626 | } | |
1627 | ||
1628 | /* | |
1629 | * This routine puts the data byte to the card waiting for the SR_TX_RDY | |
1630 | * bit to be set in a loop. It should be used in the exceptional cases | |
1631 | * only (for example when resetting the card or downloading the firmware). | |
1632 | */ | |
1633 | static int put_wait_data(struct cosa_data *cosa, int data) | |
1634 | { | |
1635 | int retries = 1000; | |
1636 | while (--retries) { | |
1637 | /* read data and return them */ | |
1638 | if (cosa_getstatus(cosa) & SR_TX_RDY) { | |
1639 | cosa_putdata8(cosa, data); | |
1640 | #if 0 | |
1641 | printk(KERN_INFO "Putdata: %d retries\n", 999-retries); | |
1642 | #endif | |
1643 | return 0; | |
1644 | } | |
1645 | #if 0 | |
1646 | /* sleep if not ready to read */ | |
1647 | current->state = TASK_INTERRUPTIBLE; | |
1648 | schedule_timeout(1); | |
1649 | #endif | |
1650 | } | |
1651 | printk(KERN_INFO "cosa%d: timeout in put_wait_data (status 0x%x)\n", | |
1652 | cosa->num, cosa_getstatus(cosa)); | |
1653 | return -1; | |
1654 | } | |
1655 | ||
1656 | /* | |
1657 | * The following routine puts the hexadecimal number into the SRP monitor | |
1658 | * and verifies the proper echo of the sent bytes. Returns 0 on success, | |
1659 | * negative number on failure (-1,-3,-5,-7) means that put_wait_data() failed, | |
1660 | * (-2,-4,-6,-8) means that reading echo failed. | |
1661 | */ | |
1662 | static int puthexnumber(struct cosa_data *cosa, int number) | |
1663 | { | |
1664 | char temp[5]; | |
1665 | int i; | |
1666 | ||
1667 | /* Well, I should probably replace this by something faster. */ | |
1668 | sprintf(temp, "%04X", number); | |
1669 | for (i=0; i<4; i++) { | |
1670 | if (put_wait_data(cosa, temp[i]) == -1) { | |
1671 | printk(KERN_NOTICE "cosa%d: puthexnumber failed to write byte %d\n", | |
1672 | cosa->num, i); | |
1673 | return -1-2*i; | |
1674 | } | |
1675 | if (get_wait_data(cosa) != temp[i]) { | |
1676 | printk(KERN_NOTICE "cosa%d: puthexhumber failed to read echo of byte %d\n", | |
1677 | cosa->num, i); | |
1678 | return -2-2*i; | |
1679 | } | |
1680 | } | |
1681 | return 0; | |
1682 | } | |
1683 | ||
1684 | \f | |
1685 | /* ---------- Interrupt routines ---------- */ | |
1686 | ||
1687 | /* | |
1688 | * There are three types of interrupt: | |
1689 | * At the beginning of transmit - this handled is in tx_interrupt(), | |
1690 | * at the beginning of receive - it is in rx_interrupt() and | |
1691 | * at the end of transmit/receive - it is the eot_interrupt() function. | |
1692 | * These functions are multiplexed by cosa_interrupt() according to the | |
1693 | * COSA status byte. I have moved the rx/tx/eot interrupt handling into | |
1694 | * separate functions to make it more readable. These functions are inline, | |
1695 | * so there should be no overhead of function call. | |
1696 | * | |
1697 | * In the COSA bus-master mode, we need to tell the card the address of a | |
1698 | * buffer. Unfortunately, COSA may be too slow for us, so we must busy-wait. | |
1699 | * It's time to use the bottom half :-( | |
1700 | */ | |
1701 | ||
1702 | /* | |
1703 | * Transmit interrupt routine - called when COSA is willing to obtain | |
1704 | * data from the OS. The most tricky part of the routine is selection | |
1705 | * of channel we (OS) want to send packet for. For SRP we should probably | |
1706 | * use the round-robin approach. The newer COSA firmwares have a simple | |
1707 | * flow-control - in the status word has bits 2 and 3 set to 1 means that the | |
1708 | * channel 0 or 1 doesn't want to receive data. | |
1709 | * | |
1710 | * It seems there is a bug in COSA firmware (need to trace it further): | |
1711 | * When the driver status says that the kernel has no more data for transmit | |
1712 | * (e.g. at the end of TX DMA) and then the kernel changes its mind | |
1713 | * (e.g. new packet is queued to hard_start_xmit()), the card issues | |
1714 | * the TX interrupt but does not mark the channel as ready-to-transmit. | |
1715 | * The fix seems to be to push the packet to COSA despite its request. | |
1716 | * We first try to obey the card's opinion, and then fall back to forced TX. | |
1717 | */ | |
1718 | static inline void tx_interrupt(struct cosa_data *cosa, int status) | |
1719 | { | |
1720 | unsigned long flags, flags1; | |
1721 | #ifdef DEBUG_IRQS | |
1722 | printk(KERN_INFO "cosa%d: SR_DOWN_REQUEST status=0x%04x\n", | |
1723 | cosa->num, status); | |
1724 | #endif | |
1725 | spin_lock_irqsave(&cosa->lock, flags); | |
1726 | set_bit(TXBIT, &cosa->rxtx); | |
1727 | if (!test_bit(IRQBIT, &cosa->rxtx)) { | |
1728 | /* flow control, see the comment above */ | |
1729 | int i=0; | |
1730 | if (!cosa->txbitmap) { | |
1731 | printk(KERN_WARNING "%s: No channel wants data " | |
1732 | "in TX IRQ. Expect DMA timeout.", | |
1733 | cosa->name); | |
1734 | put_driver_status_nolock(cosa); | |
1735 | clear_bit(TXBIT, &cosa->rxtx); | |
1736 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1737 | return; | |
1738 | } | |
1739 | while(1) { | |
1740 | cosa->txchan++; | |
1741 | i++; | |
1742 | if (cosa->txchan >= cosa->nchannels) | |
1743 | cosa->txchan = 0; | |
1744 | if (!(cosa->txbitmap & (1<<cosa->txchan))) | |
1745 | continue; | |
1746 | if (~status & (1 << (cosa->txchan+DRIVER_TXMAP_SHIFT))) | |
1747 | break; | |
1748 | /* in second pass, accept first ready-to-TX channel */ | |
1749 | if (i > cosa->nchannels) { | |
1750 | /* Can be safely ignored */ | |
1751 | #ifdef DEBUG_IRQS | |
1752 | printk(KERN_DEBUG "%s: Forcing TX " | |
1753 | "to not-ready channel %d\n", | |
1754 | cosa->name, cosa->txchan); | |
1755 | #endif | |
1756 | break; | |
1757 | } | |
1758 | } | |
1759 | ||
1760 | cosa->txsize = cosa->chan[cosa->txchan].txsize; | |
1761 | if (cosa_dma_able(cosa->chan+cosa->txchan, | |
1762 | cosa->chan[cosa->txchan].txbuf, cosa->txsize)) { | |
1763 | cosa->txbuf = cosa->chan[cosa->txchan].txbuf; | |
1764 | } else { | |
1765 | memcpy(cosa->bouncebuf, cosa->chan[cosa->txchan].txbuf, | |
1766 | cosa->txsize); | |
1767 | cosa->txbuf = cosa->bouncebuf; | |
1768 | } | |
1769 | } | |
1770 | ||
1771 | if (is_8bit(cosa)) { | |
1772 | if (!test_bit(IRQBIT, &cosa->rxtx)) { | |
1773 | cosa_putstatus(cosa, SR_TX_INT_ENA); | |
1774 | cosa_putdata8(cosa, ((cosa->txchan << 5) & 0xe0)| | |
1775 | ((cosa->txsize >> 8) & 0x1f)); | |
1776 | #ifdef DEBUG_IO | |
1777 | debug_status_out(cosa, SR_TX_INT_ENA); | |
1778 | debug_data_out(cosa, ((cosa->txchan << 5) & 0xe0)| | |
1779 | ((cosa->txsize >> 8) & 0x1f)); | |
1780 | debug_data_in(cosa, cosa_getdata8(cosa)); | |
1781 | #else | |
1782 | cosa_getdata8(cosa); | |
1783 | #endif | |
1784 | set_bit(IRQBIT, &cosa->rxtx); | |
1785 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1786 | return; | |
1787 | } else { | |
1788 | clear_bit(IRQBIT, &cosa->rxtx); | |
1789 | cosa_putstatus(cosa, 0); | |
1790 | cosa_putdata8(cosa, cosa->txsize&0xff); | |
1791 | #ifdef DEBUG_IO | |
1792 | debug_status_out(cosa, 0); | |
1793 | debug_data_out(cosa, cosa->txsize&0xff); | |
1794 | #endif | |
1795 | } | |
1796 | } else { | |
1797 | cosa_putstatus(cosa, SR_TX_INT_ENA); | |
1798 | cosa_putdata16(cosa, ((cosa->txchan<<13) & 0xe000) | |
1799 | | (cosa->txsize & 0x1fff)); | |
1800 | #ifdef DEBUG_IO | |
1801 | debug_status_out(cosa, SR_TX_INT_ENA); | |
1802 | debug_data_out(cosa, ((cosa->txchan<<13) & 0xe000) | |
1803 | | (cosa->txsize & 0x1fff)); | |
1804 | debug_data_in(cosa, cosa_getdata8(cosa)); | |
1805 | debug_status_out(cosa, 0); | |
1806 | #else | |
1807 | cosa_getdata8(cosa); | |
1808 | #endif | |
1809 | cosa_putstatus(cosa, 0); | |
1810 | } | |
1811 | ||
1812 | if (cosa->busmaster) { | |
1813 | unsigned long addr = virt_to_bus(cosa->txbuf); | |
1814 | int count=0; | |
1815 | printk(KERN_INFO "busmaster IRQ\n"); | |
1816 | while (!(cosa_getstatus(cosa)&SR_TX_RDY)) { | |
1817 | count++; | |
1818 | udelay(10); | |
1819 | if (count > 1000) break; | |
1820 | } | |
1821 | printk(KERN_INFO "status %x\n", cosa_getstatus(cosa)); | |
1822 | printk(KERN_INFO "ready after %d loops\n", count); | |
1823 | cosa_putdata16(cosa, (addr >> 16)&0xffff); | |
1824 | ||
1825 | count = 0; | |
1826 | while (!(cosa_getstatus(cosa)&SR_TX_RDY)) { | |
1827 | count++; | |
1828 | if (count > 1000) break; | |
1829 | udelay(10); | |
1830 | } | |
1831 | printk(KERN_INFO "ready after %d loops\n", count); | |
1832 | cosa_putdata16(cosa, addr &0xffff); | |
1833 | flags1 = claim_dma_lock(); | |
1834 | set_dma_mode(cosa->dma, DMA_MODE_CASCADE); | |
1835 | enable_dma(cosa->dma); | |
1836 | release_dma_lock(flags1); | |
1837 | } else { | |
1838 | /* start the DMA */ | |
1839 | flags1 = claim_dma_lock(); | |
1840 | disable_dma(cosa->dma); | |
1841 | clear_dma_ff(cosa->dma); | |
1842 | set_dma_mode(cosa->dma, DMA_MODE_WRITE); | |
1843 | set_dma_addr(cosa->dma, virt_to_bus(cosa->txbuf)); | |
1844 | set_dma_count(cosa->dma, cosa->txsize); | |
1845 | enable_dma(cosa->dma); | |
1846 | release_dma_lock(flags1); | |
1847 | } | |
1848 | cosa_putstatus(cosa, SR_TX_DMA_ENA|SR_USR_INT_ENA); | |
1849 | #ifdef DEBUG_IO | |
1850 | debug_status_out(cosa, SR_TX_DMA_ENA|SR_USR_INT_ENA); | |
1851 | #endif | |
1852 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1853 | } | |
1854 | ||
1855 | static inline void rx_interrupt(struct cosa_data *cosa, int status) | |
1856 | { | |
1857 | unsigned long flags; | |
1858 | #ifdef DEBUG_IRQS | |
1859 | printk(KERN_INFO "cosa%d: SR_UP_REQUEST\n", cosa->num); | |
1860 | #endif | |
1861 | ||
1862 | spin_lock_irqsave(&cosa->lock, flags); | |
1863 | set_bit(RXBIT, &cosa->rxtx); | |
1864 | ||
1865 | if (is_8bit(cosa)) { | |
1866 | if (!test_bit(IRQBIT, &cosa->rxtx)) { | |
1867 | set_bit(IRQBIT, &cosa->rxtx); | |
1868 | put_driver_status_nolock(cosa); | |
1869 | cosa->rxsize = cosa_getdata8(cosa) <<8; | |
1870 | #ifdef DEBUG_IO | |
1871 | debug_data_in(cosa, cosa->rxsize >> 8); | |
1872 | #endif | |
1873 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1874 | return; | |
1875 | } else { | |
1876 | clear_bit(IRQBIT, &cosa->rxtx); | |
1877 | cosa->rxsize |= cosa_getdata8(cosa) & 0xff; | |
1878 | #ifdef DEBUG_IO | |
1879 | debug_data_in(cosa, cosa->rxsize & 0xff); | |
1880 | #endif | |
1881 | #if 0 | |
1882 | printk(KERN_INFO "cosa%d: receive rxsize = (0x%04x).\n", | |
1883 | cosa->num, cosa->rxsize); | |
1884 | #endif | |
1885 | } | |
1886 | } else { | |
1887 | cosa->rxsize = cosa_getdata16(cosa); | |
1888 | #ifdef DEBUG_IO | |
1889 | debug_data_in(cosa, cosa->rxsize); | |
1890 | #endif | |
1891 | #if 0 | |
1892 | printk(KERN_INFO "cosa%d: receive rxsize = (0x%04x).\n", | |
1893 | cosa->num, cosa->rxsize); | |
1894 | #endif | |
1895 | } | |
1896 | if (((cosa->rxsize & 0xe000) >> 13) >= cosa->nchannels) { | |
1897 | printk(KERN_WARNING "%s: rx for unknown channel (0x%04x)\n", | |
1898 | cosa->name, cosa->rxsize); | |
1899 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1900 | goto reject; | |
1901 | } | |
1902 | cosa->rxchan = cosa->chan + ((cosa->rxsize & 0xe000) >> 13); | |
1903 | cosa->rxsize &= 0x1fff; | |
1904 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1905 | ||
1906 | cosa->rxbuf = NULL; | |
1907 | if (cosa->rxchan->setup_rx) | |
1908 | cosa->rxbuf = cosa->rxchan->setup_rx(cosa->rxchan, cosa->rxsize); | |
1909 | ||
1910 | if (!cosa->rxbuf) { | |
1911 | reject: /* Reject the packet */ | |
1912 | printk(KERN_INFO "cosa%d: rejecting packet on channel %d\n", | |
1913 | cosa->num, cosa->rxchan->num); | |
1914 | cosa->rxbuf = cosa->bouncebuf; | |
1915 | } | |
1916 | ||
1917 | /* start the DMA */ | |
1918 | flags = claim_dma_lock(); | |
1919 | disable_dma(cosa->dma); | |
1920 | clear_dma_ff(cosa->dma); | |
1921 | set_dma_mode(cosa->dma, DMA_MODE_READ); | |
1922 | if (cosa_dma_able(cosa->rxchan, cosa->rxbuf, cosa->rxsize & 0x1fff)) { | |
1923 | set_dma_addr(cosa->dma, virt_to_bus(cosa->rxbuf)); | |
1924 | } else { | |
1925 | set_dma_addr(cosa->dma, virt_to_bus(cosa->bouncebuf)); | |
1926 | } | |
1927 | set_dma_count(cosa->dma, (cosa->rxsize&0x1fff)); | |
1928 | enable_dma(cosa->dma); | |
1929 | release_dma_lock(flags); | |
1930 | spin_lock_irqsave(&cosa->lock, flags); | |
1931 | cosa_putstatus(cosa, SR_RX_DMA_ENA|SR_USR_INT_ENA); | |
1932 | if (!is_8bit(cosa) && (status & SR_TX_RDY)) | |
1933 | cosa_putdata8(cosa, DRIVER_RX_READY); | |
1934 | #ifdef DEBUG_IO | |
1935 | debug_status_out(cosa, SR_RX_DMA_ENA|SR_USR_INT_ENA); | |
1936 | if (!is_8bit(cosa) && (status & SR_TX_RDY)) | |
1937 | debug_data_cmd(cosa, DRIVER_RX_READY); | |
1938 | #endif | |
1939 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1940 | } | |
1941 | ||
1942 | static inline void eot_interrupt(struct cosa_data *cosa, int status) | |
1943 | { | |
1944 | unsigned long flags, flags1; | |
1945 | spin_lock_irqsave(&cosa->lock, flags); | |
1946 | flags1 = claim_dma_lock(); | |
1947 | disable_dma(cosa->dma); | |
1948 | clear_dma_ff(cosa->dma); | |
1949 | release_dma_lock(flags1); | |
1950 | if (test_bit(TXBIT, &cosa->rxtx)) { | |
1951 | struct channel_data *chan = cosa->chan+cosa->txchan; | |
1952 | if (chan->tx_done) | |
1953 | if (chan->tx_done(chan, cosa->txsize)) | |
1954 | clear_bit(chan->num, &cosa->txbitmap); | |
1955 | } else if (test_bit(RXBIT, &cosa->rxtx)) { | |
1956 | #ifdef DEBUG_DATA | |
1957 | { | |
1958 | int i; | |
1959 | printk(KERN_INFO "cosa%dc%d: done rx(0x%x)", cosa->num, | |
1960 | cosa->rxchan->num, cosa->rxsize); | |
1961 | for (i=0; i<cosa->rxsize; i++) | |
1962 | printk (" %02x", cosa->rxbuf[i]&0xff); | |
1963 | printk("\n"); | |
1964 | } | |
1965 | #endif | |
1966 | /* Packet for unknown channel? */ | |
1967 | if (cosa->rxbuf == cosa->bouncebuf) | |
1968 | goto out; | |
1969 | if (!cosa_dma_able(cosa->rxchan, cosa->rxbuf, cosa->rxsize)) | |
1970 | memcpy(cosa->rxbuf, cosa->bouncebuf, cosa->rxsize); | |
1971 | if (cosa->rxchan->rx_done) | |
1972 | if (cosa->rxchan->rx_done(cosa->rxchan)) | |
1973 | clear_bit(cosa->rxchan->num, &cosa->rxbitmap); | |
1974 | } else { | |
1975 | printk(KERN_NOTICE "cosa%d: unexpected EOT interrupt\n", | |
1976 | cosa->num); | |
1977 | } | |
1978 | /* | |
1979 | * Clear the RXBIT, TXBIT and IRQBIT (the latest should be | |
1980 | * cleared anyway). We should do it as soon as possible | |
1981 | * so that we can tell the COSA we are done and to give it a time | |
1982 | * for recovery. | |
1983 | */ | |
1984 | out: | |
1985 | cosa->rxtx = 0; | |
1986 | put_driver_status_nolock(cosa); | |
1987 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1988 | } | |
1989 | ||
1990 | static irqreturn_t cosa_interrupt(int irq, void *cosa_, struct pt_regs *regs) | |
1991 | { | |
1992 | unsigned status; | |
1993 | int count = 0; | |
1994 | struct cosa_data *cosa = cosa_; | |
1995 | again: | |
1996 | status = cosa_getstatus(cosa); | |
1997 | #ifdef DEBUG_IRQS | |
1998 | printk(KERN_INFO "cosa%d: got IRQ, status 0x%02x\n", cosa->num, | |
1999 | status & 0xff); | |
2000 | #endif | |
2001 | #ifdef DEBUG_IO | |
2002 | debug_status_in(cosa, status); | |
2003 | #endif | |
2004 | switch (status & SR_CMD_FROM_SRP_MASK) { | |
2005 | case SR_DOWN_REQUEST: | |
2006 | tx_interrupt(cosa, status); | |
2007 | break; | |
2008 | case SR_UP_REQUEST: | |
2009 | rx_interrupt(cosa, status); | |
2010 | break; | |
2011 | case SR_END_OF_TRANSFER: | |
2012 | eot_interrupt(cosa, status); | |
2013 | break; | |
2014 | default: | |
2015 | /* We may be too fast for SRP. Try to wait a bit more. */ | |
2016 | if (count++ < 100) { | |
2017 | udelay(100); | |
2018 | goto again; | |
2019 | } | |
2020 | printk(KERN_INFO "cosa%d: unknown status 0x%02x in IRQ after %d retries\n", | |
2021 | cosa->num, status & 0xff, count); | |
2022 | } | |
2023 | #ifdef DEBUG_IRQS | |
2024 | if (count) | |
2025 | printk(KERN_INFO "%s: %d-times got unknown status in IRQ\n", | |
2026 | cosa->name, count); | |
2027 | else | |
2028 | printk(KERN_INFO "%s: returning from IRQ\n", cosa->name); | |
2029 | #endif | |
2030 | return IRQ_HANDLED; | |
2031 | } | |
2032 | ||
2033 | \f | |
2034 | /* ---------- I/O debugging routines ---------- */ | |
2035 | /* | |
2036 | * These routines can be used to monitor COSA/SRP I/O and to printk() | |
2037 | * the data being transferred on the data and status I/O port in a | |
2038 | * readable way. | |
2039 | */ | |
2040 | ||
2041 | #ifdef DEBUG_IO | |
2042 | static void debug_status_in(struct cosa_data *cosa, int status) | |
2043 | { | |
2044 | char *s; | |
2045 | switch(status & SR_CMD_FROM_SRP_MASK) { | |
2046 | case SR_UP_REQUEST: | |
2047 | s = "RX_REQ"; | |
2048 | break; | |
2049 | case SR_DOWN_REQUEST: | |
2050 | s = "TX_REQ"; | |
2051 | break; | |
2052 | case SR_END_OF_TRANSFER: | |
2053 | s = "ET_REQ"; | |
2054 | break; | |
2055 | default: | |
2056 | s = "NO_REQ"; | |
2057 | break; | |
2058 | } | |
2059 | printk(KERN_INFO "%s: IO: status -> 0x%02x (%s%s%s%s)\n", | |
2060 | cosa->name, | |
2061 | status, | |
2062 | status & SR_USR_RQ ? "USR_RQ|":"", | |
2063 | status & SR_TX_RDY ? "TX_RDY|":"", | |
2064 | status & SR_RX_RDY ? "RX_RDY|":"", | |
2065 | s); | |
2066 | } | |
2067 | ||
2068 | static void debug_status_out(struct cosa_data *cosa, int status) | |
2069 | { | |
2070 | printk(KERN_INFO "%s: IO: status <- 0x%02x (%s%s%s%s%s%s)\n", | |
2071 | cosa->name, | |
2072 | status, | |
2073 | status & SR_RX_DMA_ENA ? "RXDMA|":"!rxdma|", | |
2074 | status & SR_TX_DMA_ENA ? "TXDMA|":"!txdma|", | |
2075 | status & SR_RST ? "RESET|":"", | |
2076 | status & SR_USR_INT_ENA ? "USRINT|":"!usrint|", | |
2077 | status & SR_TX_INT_ENA ? "TXINT|":"!txint|", | |
2078 | status & SR_RX_INT_ENA ? "RXINT":"!rxint"); | |
2079 | } | |
2080 | ||
2081 | static void debug_data_in(struct cosa_data *cosa, int data) | |
2082 | { | |
2083 | printk(KERN_INFO "%s: IO: data -> 0x%04x\n", cosa->name, data); | |
2084 | } | |
2085 | ||
2086 | static void debug_data_out(struct cosa_data *cosa, int data) | |
2087 | { | |
2088 | printk(KERN_INFO "%s: IO: data <- 0x%04x\n", cosa->name, data); | |
2089 | } | |
2090 | ||
2091 | static void debug_data_cmd(struct cosa_data *cosa, int data) | |
2092 | { | |
2093 | printk(KERN_INFO "%s: IO: data <- 0x%04x (%s|%s)\n", | |
2094 | cosa->name, data, | |
2095 | data & SR_RDY_RCV ? "RX_RDY" : "!rx_rdy", | |
2096 | data & SR_RDY_SND ? "TX_RDY" : "!tx_rdy"); | |
2097 | } | |
2098 | #endif | |
2099 | ||
2100 | /* EOF -- this file has not been truncated */ |