Commit | Line | Data |
---|---|---|
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> | |
aca25753 | 5 | * Generic HDLC port Copyright (C) 2008 Krzysztof Halasa <khc@pm.waw.pl> |
1da177e4 LT |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
20 | */ | |
21 | ||
22 | /* | |
23 | * The driver for the SRP and COSA synchronous serial cards. | |
24 | * | |
25 | * HARDWARE INFO | |
26 | * | |
27 | * Both cards are developed at the Institute of Computer Science, | |
28 | * Masaryk University (http://www.ics.muni.cz/). The hardware is | |
29 | * developed by Jiri Novotny <novotny@ics.muni.cz>. More information | |
30 | * and the photo of both cards is available at | |
31 | * http://www.pavoucek.cz/cosa.html. The card documentation, firmwares | |
32 | * and other goods can be downloaded from ftp://ftp.ics.muni.cz/pub/cosa/. | |
33 | * For Linux-specific utilities, see below in the "Software info" section. | |
34 | * If you want to order the card, contact Jiri Novotny. | |
35 | * | |
36 | * The SRP (serial port?, the Czech word "srp" means "sickle") card | |
37 | * is a 2-port intelligent (with its own 8-bit CPU) synchronous serial card | |
38 | * with V.24 interfaces up to 80kb/s each. | |
39 | * | |
40 | * The COSA (communication serial adapter?, the Czech word "kosa" means | |
41 | * "scythe") is a next-generation sync/async board with two interfaces | |
42 | * - currently any of V.24, X.21, V.35 and V.36 can be selected. | |
43 | * It has a 16-bit SAB80166 CPU and can do up to 10 Mb/s per channel. | |
44 | * The 8-channels version is in development. | |
45 | * | |
46 | * Both types have downloadable firmware and communicate via ISA DMA. | |
47 | * COSA can be also a bus-mastering device. | |
48 | * | |
49 | * SOFTWARE INFO | |
50 | * | |
51 | * The homepage of the Linux driver is at http://www.fi.muni.cz/~kas/cosa/. | |
52 | * The CVS tree of Linux driver can be viewed there, as well as the | |
53 | * firmware binaries and user-space utilities for downloading the firmware | |
54 | * into the card and setting up the card. | |
55 | * | |
56 | * The Linux driver (unlike the present *BSD drivers :-) can work even | |
57 | * for the COSA and SRP in one computer and allows each channel to work | |
aca25753 | 58 | * in one of the two modes (character or network device). |
1da177e4 LT |
59 | * |
60 | * AUTHOR | |
61 | * | |
62 | * The Linux driver was written by Jan "Yenya" Kasprzak <kas@fi.muni.cz>. | |
63 | * | |
64 | * You can mail me bugfixes and even success reports. I am especially | |
65 | * interested in the SMP and/or muliti-channel success/failure reports | |
66 | * (I wonder if I did the locking properly :-). | |
67 | * | |
68 | * THE AUTHOR USED THE FOLLOWING SOURCES WHEN PROGRAMMING THE DRIVER | |
69 | * | |
70 | * The COSA/SRP NetBSD driver by Zdenek Salvet and Ivos Cernohlavek | |
71 | * The skeleton.c by Donald Becker | |
72 | * The SDL Riscom/N2 driver by Mike Natale | |
73 | * The Comtrol Hostess SV11 driver by Alan Cox | |
74 | * The Sync PPP/Cisco HDLC layer (syncppp.c) ported to Linux by Alan Cox | |
75 | */ | |
1da177e4 | 76 | |
9cbe50d4 JP |
77 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
78 | ||
1da177e4 LT |
79 | #include <linux/module.h> |
80 | #include <linux/kernel.h> | |
d43c36dc | 81 | #include <linux/sched.h> |
1da177e4 LT |
82 | #include <linux/slab.h> |
83 | #include <linux/poll.h> | |
84 | #include <linux/fs.h> | |
1da177e4 LT |
85 | #include <linux/interrupt.h> |
86 | #include <linux/delay.h> | |
aca25753 | 87 | #include <linux/hdlc.h> |
1da177e4 LT |
88 | #include <linux/errno.h> |
89 | #include <linux/ioport.h> | |
90 | #include <linux/netdevice.h> | |
91 | #include <linux/spinlock.h> | |
6387c4be | 92 | #include <linux/mutex.h> |
1da177e4 | 93 | #include <linux/device.h> |
1da177e4 LT |
94 | #include <asm/io.h> |
95 | #include <asm/dma.h> | |
96 | #include <asm/byteorder.h> | |
97 | ||
aca25753 KH |
98 | #undef COSA_SLOW_IO /* for testing purposes only */ |
99 | ||
1da177e4 LT |
100 | #include "cosa.h" |
101 | ||
102 | /* Maximum length of the identification string. */ | |
103 | #define COSA_MAX_ID_STRING 128 | |
104 | ||
105 | /* Maximum length of the channel name */ | |
106 | #define COSA_MAX_NAME (sizeof("cosaXXXcXXX")+1) | |
107 | ||
108 | /* Per-channel data structure */ | |
109 | ||
110 | struct channel_data { | |
1da177e4 LT |
111 | int usage; /* Usage count; >0 for chrdev, -1 for netdev */ |
112 | int num; /* Number of the channel */ | |
113 | struct cosa_data *cosa; /* Pointer to the per-card structure */ | |
114 | int txsize; /* Size of transmitted data */ | |
115 | char *txbuf; /* Transmit buffer */ | |
116 | char name[COSA_MAX_NAME]; /* channel name */ | |
117 | ||
118 | /* The HW layer interface */ | |
119 | /* routine called from the RX interrupt */ | |
120 | char *(*setup_rx)(struct channel_data *channel, int size); | |
121 | /* routine called when the RX is done (from the EOT interrupt) */ | |
122 | int (*rx_done)(struct channel_data *channel); | |
123 | /* routine called when the TX is done (from the EOT interrupt) */ | |
124 | int (*tx_done)(struct channel_data *channel, int size); | |
125 | ||
126 | /* Character device parts */ | |
6387c4be MK |
127 | struct mutex rlock; |
128 | struct semaphore wsem; | |
1da177e4 LT |
129 | char *rxdata; |
130 | int rxsize; | |
131 | wait_queue_head_t txwaitq, rxwaitq; | |
132 | int tx_status, rx_status; | |
133 | ||
aca25753 KH |
134 | /* generic HDLC device parts */ |
135 | struct net_device *netdev; | |
1da177e4 | 136 | struct sk_buff *rx_skb, *tx_skb; |
1da177e4 LT |
137 | }; |
138 | ||
139 | /* cosa->firmware_status bits */ | |
140 | #define COSA_FW_RESET (1<<0) /* Is the ROM monitor active? */ | |
141 | #define COSA_FW_DOWNLOAD (1<<1) /* Is the microcode downloaded? */ | |
142 | #define COSA_FW_START (1<<2) /* Is the microcode running? */ | |
143 | ||
144 | struct cosa_data { | |
145 | int num; /* Card number */ | |
146 | char name[COSA_MAX_NAME]; /* Card name - e.g "cosa0" */ | |
147 | unsigned int datareg, statusreg; /* I/O ports */ | |
148 | unsigned short irq, dma; /* IRQ and DMA number */ | |
149 | unsigned short startaddr; /* Firmware start address */ | |
150 | unsigned short busmaster; /* Use busmastering? */ | |
151 | int nchannels; /* # of channels on this card */ | |
152 | int driver_status; /* For communicating with firmware */ | |
153 | int firmware_status; /* Downloaded, reseted, etc. */ | |
64b33619 AV |
154 | unsigned long rxbitmap, txbitmap;/* Bitmap of channels who are willing to send/receive data */ |
155 | unsigned long rxtx; /* RX or TX in progress? */ | |
1da177e4 LT |
156 | int enabled; |
157 | int usage; /* usage count */ | |
158 | int txchan, txsize, rxsize; | |
159 | struct channel_data *rxchan; | |
160 | char *bouncebuf; | |
161 | char *txbuf, *rxbuf; | |
162 | struct channel_data *chan; | |
163 | spinlock_t lock; /* For exclusive operations on this structure */ | |
164 | char id_string[COSA_MAX_ID_STRING]; /* ROM monitor ID string */ | |
165 | char *type; /* card type */ | |
166 | }; | |
167 | ||
168 | /* | |
169 | * Define this if you want all the possible ports to be autoprobed. | |
170 | * It is here but it probably is not a good idea to use this. | |
171 | */ | |
172 | /* #define COSA_ISA_AUTOPROBE 1 */ | |
173 | ||
174 | /* | |
175 | * Character device major number. 117 was allocated for us. | |
176 | * The value of 0 means to allocate a first free one. | |
177 | */ | |
15fd0cd9 | 178 | static DEFINE_MUTEX(cosa_chardev_mutex); |
1da177e4 LT |
179 | static int cosa_major = 117; |
180 | ||
181 | /* | |
182 | * Encoding of the minor numbers: | |
183 | * The lowest CARD_MINOR_BITS bits means the channel on the single card, | |
184 | * the highest bits means the card number. | |
185 | */ | |
186 | #define CARD_MINOR_BITS 4 /* How many bits in minor number are reserved | |
187 | * for the single card */ | |
188 | /* | |
189 | * The following depends on CARD_MINOR_BITS. Unfortunately, the "MODULE_STRING" | |
190 | * macro doesn't like anything other than the raw number as an argument :-( | |
191 | */ | |
192 | #define MAX_CARDS 16 | |
193 | /* #define MAX_CARDS (1 << (8-CARD_MINOR_BITS)) */ | |
194 | ||
195 | #define DRIVER_RX_READY 0x0001 | |
196 | #define DRIVER_TX_READY 0x0002 | |
197 | #define DRIVER_TXMAP_SHIFT 2 | |
198 | #define DRIVER_TXMAP_MASK 0x0c /* FIXME: 0xfc for 8-channel version */ | |
199 | ||
200 | /* | |
201 | * for cosa->rxtx - indicates whether either transmit or receive is | |
202 | * in progress. These values are mean number of the bit. | |
203 | */ | |
204 | #define TXBIT 0 | |
205 | #define RXBIT 1 | |
206 | #define IRQBIT 2 | |
207 | ||
208 | #define COSA_MTU 2000 /* FIXME: I don't know this exactly */ | |
209 | ||
210 | #undef DEBUG_DATA //1 /* Dump the data read or written to the channel */ | |
211 | #undef DEBUG_IRQS //1 /* Print the message when the IRQ is received */ | |
212 | #undef DEBUG_IO //1 /* Dump the I/O traffic */ | |
213 | ||
214 | #define TX_TIMEOUT (5*HZ) | |
215 | ||
216 | /* Maybe the following should be allocated dynamically */ | |
217 | static struct cosa_data cosa_cards[MAX_CARDS]; | |
218 | static int nr_cards; | |
219 | ||
220 | #ifdef COSA_ISA_AUTOPROBE | |
221 | static int io[MAX_CARDS+1] = { 0x220, 0x228, 0x210, 0x218, 0, }; | |
222 | /* NOTE: DMA is not autoprobed!!! */ | |
223 | static int dma[MAX_CARDS+1] = { 1, 7, 1, 7, 1, 7, 1, 7, 0, }; | |
224 | #else | |
225 | static int io[MAX_CARDS+1]; | |
226 | static int dma[MAX_CARDS+1]; | |
227 | #endif | |
228 | /* IRQ can be safely autoprobed */ | |
229 | static int irq[MAX_CARDS+1] = { -1, -1, -1, -1, -1, -1, 0, }; | |
230 | ||
231 | /* for class stuff*/ | |
56b22935 | 232 | static struct class *cosa_class; |
1da177e4 LT |
233 | |
234 | #ifdef MODULE | |
235 | module_param_array(io, int, NULL, 0); | |
236 | MODULE_PARM_DESC(io, "The I/O bases of the COSA or SRP cards"); | |
237 | module_param_array(irq, int, NULL, 0); | |
238 | MODULE_PARM_DESC(irq, "The IRQ lines of the COSA or SRP cards"); | |
239 | module_param_array(dma, int, NULL, 0); | |
240 | MODULE_PARM_DESC(dma, "The DMA channels of the COSA or SRP cards"); | |
241 | ||
242 | MODULE_AUTHOR("Jan \"Yenya\" Kasprzak, <kas@fi.muni.cz>"); | |
243 | MODULE_DESCRIPTION("Modular driver for the COSA or SRP synchronous card"); | |
244 | MODULE_LICENSE("GPL"); | |
245 | #endif | |
246 | ||
247 | /* I use this mainly for testing purposes */ | |
248 | #ifdef COSA_SLOW_IO | |
249 | #define cosa_outb outb_p | |
250 | #define cosa_outw outw_p | |
251 | #define cosa_inb inb_p | |
252 | #define cosa_inw inw_p | |
253 | #else | |
254 | #define cosa_outb outb | |
255 | #define cosa_outw outw | |
256 | #define cosa_inb inb | |
257 | #define cosa_inw inw | |
258 | #endif | |
259 | ||
260 | #define is_8bit(cosa) (!(cosa->datareg & 0x08)) | |
261 | ||
262 | #define cosa_getstatus(cosa) (cosa_inb(cosa->statusreg)) | |
263 | #define cosa_putstatus(cosa, stat) (cosa_outb(stat, cosa->statusreg)) | |
264 | #define cosa_getdata16(cosa) (cosa_inw(cosa->datareg)) | |
265 | #define cosa_getdata8(cosa) (cosa_inb(cosa->datareg)) | |
266 | #define cosa_putdata16(cosa, dt) (cosa_outw(dt, cosa->datareg)) | |
267 | #define cosa_putdata8(cosa, dt) (cosa_outb(dt, cosa->datareg)) | |
268 | ||
269 | /* Initialization stuff */ | |
270 | static int cosa_probe(int ioaddr, int irq, int dma); | |
271 | ||
272 | /* HW interface */ | |
273 | static void cosa_enable_rx(struct channel_data *chan); | |
274 | static void cosa_disable_rx(struct channel_data *chan); | |
275 | static int cosa_start_tx(struct channel_data *channel, char *buf, int size); | |
276 | static void cosa_kick(struct cosa_data *cosa); | |
277 | static int cosa_dma_able(struct channel_data *chan, char *buf, int data); | |
278 | ||
aca25753 KH |
279 | /* Network device stuff */ |
280 | static int cosa_net_attach(struct net_device *dev, unsigned short encoding, | |
281 | unsigned short parity); | |
282 | static int cosa_net_open(struct net_device *d); | |
283 | static int cosa_net_close(struct net_device *d); | |
284 | static void cosa_net_timeout(struct net_device *d); | |
d71a6749 | 285 | static netdev_tx_t cosa_net_tx(struct sk_buff *skb, struct net_device *d); |
aca25753 KH |
286 | static char *cosa_net_setup_rx(struct channel_data *channel, int size); |
287 | static int cosa_net_rx_done(struct channel_data *channel); | |
288 | static int cosa_net_tx_done(struct channel_data *channel, int size); | |
289 | static int cosa_net_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd); | |
1da177e4 LT |
290 | |
291 | /* Character device */ | |
1da177e4 LT |
292 | static char *chrdev_setup_rx(struct channel_data *channel, int size); |
293 | static int chrdev_rx_done(struct channel_data *channel); | |
294 | static int chrdev_tx_done(struct channel_data *channel, int size); | |
295 | static ssize_t cosa_read(struct file *file, | |
296 | char __user *buf, size_t count, loff_t *ppos); | |
297 | static ssize_t cosa_write(struct file *file, | |
298 | const char __user *buf, size_t count, loff_t *ppos); | |
299 | static unsigned int cosa_poll(struct file *file, poll_table *poll); | |
300 | static int cosa_open(struct inode *inode, struct file *file); | |
301 | static int cosa_release(struct inode *inode, struct file *file); | |
2395f0e8 AC |
302 | static long cosa_chardev_ioctl(struct file *file, unsigned int cmd, |
303 | unsigned long arg); | |
1da177e4 LT |
304 | #ifdef COSA_FASYNC_WORKING |
305 | static int cosa_fasync(struct inode *inode, struct file *file, int on); | |
306 | #endif | |
307 | ||
d54b1fdb | 308 | static const struct file_operations cosa_fops = { |
1da177e4 LT |
309 | .owner = THIS_MODULE, |
310 | .llseek = no_llseek, | |
311 | .read = cosa_read, | |
312 | .write = cosa_write, | |
313 | .poll = cosa_poll, | |
2395f0e8 | 314 | .unlocked_ioctl = cosa_chardev_ioctl, |
1da177e4 LT |
315 | .open = cosa_open, |
316 | .release = cosa_release, | |
317 | #ifdef COSA_FASYNC_WORKING | |
318 | .fasync = cosa_fasync, | |
319 | #endif | |
320 | }; | |
321 | ||
322 | /* Ioctls */ | |
323 | static int cosa_start(struct cosa_data *cosa, int address); | |
324 | static int cosa_reset(struct cosa_data *cosa); | |
325 | static int cosa_download(struct cosa_data *cosa, void __user *a); | |
326 | static int cosa_readmem(struct cosa_data *cosa, void __user *a); | |
327 | ||
328 | /* COSA/SRP ROM monitor */ | |
329 | static int download(struct cosa_data *cosa, const char __user *data, int addr, int len); | |
330 | static int startmicrocode(struct cosa_data *cosa, int address); | |
331 | static int readmem(struct cosa_data *cosa, char __user *data, int addr, int len); | |
332 | static int cosa_reset_and_read_id(struct cosa_data *cosa, char *id); | |
333 | ||
25985edc | 334 | /* Auxiliary functions */ |
1da177e4 LT |
335 | static int get_wait_data(struct cosa_data *cosa); |
336 | static int put_wait_data(struct cosa_data *cosa, int data); | |
337 | static int puthexnumber(struct cosa_data *cosa, int number); | |
338 | static void put_driver_status(struct cosa_data *cosa); | |
339 | static void put_driver_status_nolock(struct cosa_data *cosa); | |
340 | ||
341 | /* Interrupt handling */ | |
7d12e780 | 342 | static irqreturn_t cosa_interrupt(int irq, void *cosa); |
1da177e4 LT |
343 | |
344 | /* I/O ops debugging */ | |
345 | #ifdef DEBUG_IO | |
346 | static void debug_data_in(struct cosa_data *cosa, int data); | |
347 | static void debug_data_out(struct cosa_data *cosa, int data); | |
348 | static void debug_data_cmd(struct cosa_data *cosa, int data); | |
349 | static void debug_status_in(struct cosa_data *cosa, int status); | |
350 | static void debug_status_out(struct cosa_data *cosa, int status); | |
351 | #endif | |
352 | ||
aca25753 KH |
353 | static inline struct channel_data* dev_to_chan(struct net_device *dev) |
354 | { | |
355 | return (struct channel_data *)dev_to_hdlc(dev)->priv; | |
356 | } | |
357 | ||
1da177e4 LT |
358 | /* ---------- Initialization stuff ---------- */ |
359 | ||
360 | static int __init cosa_init(void) | |
361 | { | |
362 | int i, err = 0; | |
363 | ||
1da177e4 LT |
364 | if (cosa_major > 0) { |
365 | if (register_chrdev(cosa_major, "cosa", &cosa_fops)) { | |
9cbe50d4 | 366 | pr_warn("unable to get major %d\n", cosa_major); |
1da177e4 LT |
367 | err = -EIO; |
368 | goto out; | |
369 | } | |
370 | } else { | |
371 | if (!(cosa_major=register_chrdev(0, "cosa", &cosa_fops))) { | |
9cbe50d4 | 372 | pr_warn("unable to register chardev\n"); |
1da177e4 LT |
373 | err = -EIO; |
374 | goto out; | |
375 | } | |
376 | } | |
377 | for (i=0; i<MAX_CARDS; i++) | |
378 | cosa_cards[i].num = -1; | |
379 | for (i=0; io[i] != 0 && i < MAX_CARDS; i++) | |
380 | cosa_probe(io[i], irq[i], dma[i]); | |
381 | if (!nr_cards) { | |
9cbe50d4 | 382 | pr_warn("no devices found\n"); |
1da177e4 LT |
383 | unregister_chrdev(cosa_major, "cosa"); |
384 | err = -ENODEV; | |
385 | goto out; | |
386 | } | |
56b22935 | 387 | cosa_class = class_create(THIS_MODULE, "cosa"); |
1da177e4 LT |
388 | if (IS_ERR(cosa_class)) { |
389 | err = PTR_ERR(cosa_class); | |
390 | goto out_chrdev; | |
391 | } | |
e17da9c4 | 392 | for (i = 0; i < nr_cards; i++) |
6e05d6c4 GKH |
393 | device_create(cosa_class, NULL, MKDEV(cosa_major, i), NULL, |
394 | "cosa%d", i); | |
1da177e4 LT |
395 | err = 0; |
396 | goto out; | |
aca25753 | 397 | |
1da177e4 LT |
398 | out_chrdev: |
399 | unregister_chrdev(cosa_major, "cosa"); | |
400 | out: | |
401 | return err; | |
402 | } | |
403 | module_init(cosa_init); | |
404 | ||
405 | static void __exit cosa_exit(void) | |
406 | { | |
407 | struct cosa_data *cosa; | |
408 | int i; | |
1da177e4 | 409 | |
aca25753 | 410 | for (i = 0; i < nr_cards; i++) |
02ff82ca | 411 | device_destroy(cosa_class, MKDEV(cosa_major, i)); |
56b22935 | 412 | class_destroy(cosa_class); |
aca25753 KH |
413 | |
414 | for (cosa = cosa_cards; nr_cards--; cosa++) { | |
1da177e4 | 415 | /* Clean up the per-channel data */ |
aca25753 | 416 | for (i = 0; i < cosa->nchannels; i++) { |
1da177e4 | 417 | /* Chardev driver has no alloc'd per-channel data */ |
aca25753 KH |
418 | unregister_hdlc_device(cosa->chan[i].netdev); |
419 | free_netdev(cosa->chan[i].netdev); | |
1da177e4 LT |
420 | } |
421 | /* Clean up the per-card data */ | |
422 | kfree(cosa->chan); | |
423 | kfree(cosa->bouncebuf); | |
424 | free_irq(cosa->irq, cosa); | |
425 | free_dma(cosa->dma); | |
aca25753 | 426 | release_region(cosa->datareg, is_8bit(cosa) ? 2 : 4); |
1da177e4 LT |
427 | } |
428 | unregister_chrdev(cosa_major, "cosa"); | |
429 | } | |
430 | module_exit(cosa_exit); | |
431 | ||
991990a1 KH |
432 | static const struct net_device_ops cosa_ops = { |
433 | .ndo_open = cosa_net_open, | |
434 | .ndo_stop = cosa_net_close, | |
435 | .ndo_change_mtu = hdlc_change_mtu, | |
436 | .ndo_start_xmit = hdlc_start_xmit, | |
437 | .ndo_do_ioctl = cosa_net_ioctl, | |
438 | .ndo_tx_timeout = cosa_net_timeout, | |
439 | }; | |
440 | ||
1da177e4 LT |
441 | static int cosa_probe(int base, int irq, int dma) |
442 | { | |
443 | struct cosa_data *cosa = cosa_cards+nr_cards; | |
444 | int i, err = 0; | |
445 | ||
446 | memset(cosa, 0, sizeof(struct cosa_data)); | |
447 | ||
448 | /* Checking validity of parameters: */ | |
449 | /* IRQ should be 2-7 or 10-15; negative IRQ means autoprobe */ | |
450 | if ((irq >= 0 && irq < 2) || irq > 15 || (irq < 10 && irq > 7)) { | |
9cbe50d4 | 451 | pr_info("invalid IRQ %d\n", irq); |
1da177e4 LT |
452 | return -1; |
453 | } | |
454 | /* I/O address should be between 0x100 and 0x3ff and should be | |
455 | * multiple of 8. */ | |
456 | if (base < 0x100 || base > 0x3ff || base & 0x7) { | |
9cbe50d4 | 457 | pr_info("invalid I/O address 0x%x\n", base); |
1da177e4 LT |
458 | return -1; |
459 | } | |
460 | /* DMA should be 0,1 or 3-7 */ | |
461 | if (dma < 0 || dma == 4 || dma > 7) { | |
9cbe50d4 | 462 | pr_info("invalid DMA %d\n", dma); |
1da177e4 LT |
463 | return -1; |
464 | } | |
465 | /* and finally, on 16-bit COSA DMA should be 4-7 and | |
466 | * I/O base should not be multiple of 0x10 */ | |
467 | if (((base & 0x8) && dma < 4) || (!(base & 0x8) && dma > 3)) { | |
9cbe50d4 JP |
468 | pr_info("8/16 bit base and DMA mismatch (base=0x%x, dma=%d)\n", |
469 | base, dma); | |
1da177e4 LT |
470 | return -1; |
471 | } | |
472 | ||
473 | cosa->dma = dma; | |
474 | cosa->datareg = base; | |
475 | cosa->statusreg = is_8bit(cosa)?base+1:base+2; | |
476 | spin_lock_init(&cosa->lock); | |
477 | ||
478 | if (!request_region(base, is_8bit(cosa)?2:4,"cosa")) | |
479 | return -1; | |
480 | ||
481 | if (cosa_reset_and_read_id(cosa, cosa->id_string) < 0) { | |
9cbe50d4 | 482 | printk(KERN_DEBUG "probe at 0x%x failed.\n", base); |
1da177e4 LT |
483 | err = -1; |
484 | goto err_out; | |
485 | } | |
486 | ||
487 | /* Test the validity of identification string */ | |
488 | if (!strncmp(cosa->id_string, "SRP", 3)) | |
489 | cosa->type = "srp"; | |
490 | else if (!strncmp(cosa->id_string, "COSA", 4)) | |
491 | cosa->type = is_8bit(cosa)? "cosa8": "cosa16"; | |
492 | else { | |
493 | /* Print a warning only if we are not autoprobing */ | |
494 | #ifndef COSA_ISA_AUTOPROBE | |
9cbe50d4 | 495 | pr_info("valid signature not found at 0x%x\n", base); |
1da177e4 LT |
496 | #endif |
497 | err = -1; | |
498 | goto err_out; | |
499 | } | |
500 | /* Update the name of the region now we know the type of card */ | |
501 | release_region(base, is_8bit(cosa)?2:4); | |
502 | if (!request_region(base, is_8bit(cosa)?2:4, cosa->type)) { | |
9cbe50d4 | 503 | printk(KERN_DEBUG "changing name at 0x%x failed.\n", base); |
1da177e4 LT |
504 | return -1; |
505 | } | |
506 | ||
507 | /* Now do IRQ autoprobe */ | |
508 | if (irq < 0) { | |
509 | unsigned long irqs; | |
9cbe50d4 | 510 | /* pr_info("IRQ autoprobe\n"); */ |
1da177e4 LT |
511 | irqs = probe_irq_on(); |
512 | /* | |
513 | * Enable interrupt on tx buffer empty (it sure is) | |
514 | * really sure ? | |
515 | * FIXME: When this code is not used as module, we should | |
516 | * probably call udelay() instead of the interruptible sleep. | |
517 | */ | |
518 | set_current_state(TASK_INTERRUPTIBLE); | |
519 | cosa_putstatus(cosa, SR_TX_INT_ENA); | |
fb79c066 | 520 | schedule_timeout(msecs_to_jiffies(300)); |
1da177e4 LT |
521 | irq = probe_irq_off(irqs); |
522 | /* Disable all IRQs from the card */ | |
523 | cosa_putstatus(cosa, 0); | |
524 | /* Empty the received data register */ | |
525 | cosa_getdata8(cosa); | |
526 | ||
527 | if (irq < 0) { | |
9cbe50d4 | 528 | pr_info("multiple interrupts obtained (%d, board at 0x%x)\n", |
1da177e4 LT |
529 | irq, cosa->datareg); |
530 | err = -1; | |
531 | goto err_out; | |
532 | } | |
533 | if (irq == 0) { | |
9cbe50d4 | 534 | pr_info("no interrupt obtained (board at 0x%x)\n", |
1da177e4 LT |
535 | cosa->datareg); |
536 | /* return -1; */ | |
537 | } | |
538 | } | |
539 | ||
540 | cosa->irq = irq; | |
541 | cosa->num = nr_cards; | |
542 | cosa->usage = 0; | |
543 | cosa->nchannels = 2; /* FIXME: how to determine this? */ | |
544 | ||
545 | if (request_irq(cosa->irq, cosa_interrupt, 0, cosa->type, cosa)) { | |
546 | err = -1; | |
547 | goto err_out; | |
548 | } | |
549 | if (request_dma(cosa->dma, cosa->type)) { | |
550 | err = -1; | |
551 | goto err_out1; | |
552 | } | |
553 | ||
554 | cosa->bouncebuf = kmalloc(COSA_MTU, GFP_KERNEL|GFP_DMA); | |
555 | if (!cosa->bouncebuf) { | |
556 | err = -ENOMEM; | |
557 | goto err_out2; | |
558 | } | |
559 | sprintf(cosa->name, "cosa%d", cosa->num); | |
560 | ||
561 | /* Initialize the per-channel data */ | |
dd00cc48 | 562 | cosa->chan = kcalloc(cosa->nchannels, sizeof(struct channel_data), GFP_KERNEL); |
1da177e4 | 563 | if (!cosa->chan) { |
aca25753 | 564 | err = -ENOMEM; |
1da177e4 LT |
565 | goto err_out3; |
566 | } | |
aca25753 KH |
567 | |
568 | for (i = 0; i < cosa->nchannels; i++) { | |
569 | struct channel_data *chan = &cosa->chan[i]; | |
570 | ||
571 | chan->cosa = cosa; | |
572 | chan->num = i; | |
573 | sprintf(chan->name, "cosa%dc%d", chan->cosa->num, i); | |
574 | ||
575 | /* Initialize the chardev data structures */ | |
576 | mutex_init(&chan->rlock); | |
d1985508 | 577 | sema_init(&chan->wsem, 1); |
aca25753 KH |
578 | |
579 | /* Register the network interface */ | |
580 | if (!(chan->netdev = alloc_hdlcdev(chan))) { | |
9cbe50d4 | 581 | pr_warn("%s: alloc_hdlcdev failed\n", chan->name); |
a3786a5f | 582 | err = -ENOMEM; |
aca25753 KH |
583 | goto err_hdlcdev; |
584 | } | |
585 | dev_to_hdlc(chan->netdev)->attach = cosa_net_attach; | |
586 | dev_to_hdlc(chan->netdev)->xmit = cosa_net_tx; | |
991990a1 | 587 | chan->netdev->netdev_ops = &cosa_ops; |
aca25753 KH |
588 | chan->netdev->watchdog_timeo = TX_TIMEOUT; |
589 | chan->netdev->base_addr = chan->cosa->datareg; | |
590 | chan->netdev->irq = chan->cosa->irq; | |
591 | chan->netdev->dma = chan->cosa->dma; | |
e6d00693 DC |
592 | err = register_hdlc_device(chan->netdev); |
593 | if (err) { | |
9cbe50d4 JP |
594 | netdev_warn(chan->netdev, |
595 | "register_hdlc_device() failed\n"); | |
aca25753 KH |
596 | free_netdev(chan->netdev); |
597 | goto err_hdlcdev; | |
598 | } | |
1da177e4 LT |
599 | } |
600 | ||
9cbe50d4 | 601 | pr_info("cosa%d: %s (%s at 0x%x irq %d dma %d), %d channels\n", |
1da177e4 LT |
602 | cosa->num, cosa->id_string, cosa->type, |
603 | cosa->datareg, cosa->irq, cosa->dma, cosa->nchannels); | |
604 | ||
605 | return nr_cards++; | |
aca25753 KH |
606 | |
607 | err_hdlcdev: | |
608 | while (i-- > 0) { | |
609 | unregister_hdlc_device(cosa->chan[i].netdev); | |
610 | free_netdev(cosa->chan[i].netdev); | |
611 | } | |
612 | kfree(cosa->chan); | |
1da177e4 LT |
613 | err_out3: |
614 | kfree(cosa->bouncebuf); | |
615 | err_out2: | |
616 | free_dma(cosa->dma); | |
617 | err_out1: | |
618 | free_irq(cosa->irq, cosa); | |
aca25753 | 619 | err_out: |
1da177e4 | 620 | release_region(cosa->datareg,is_8bit(cosa)?2:4); |
9cbe50d4 | 621 | pr_notice("cosa%d: allocating resources failed\n", cosa->num); |
1da177e4 LT |
622 | return err; |
623 | } | |
624 | ||
625 | \f | |
aca25753 | 626 | /*---------- network device ---------- */ |
1da177e4 | 627 | |
aca25753 KH |
628 | static int cosa_net_attach(struct net_device *dev, unsigned short encoding, |
629 | unsigned short parity) | |
1da177e4 | 630 | { |
aca25753 KH |
631 | if (encoding == ENCODING_NRZ && parity == PARITY_CRC16_PR1_CCITT) |
632 | return 0; | |
633 | return -EINVAL; | |
1da177e4 LT |
634 | } |
635 | ||
aca25753 | 636 | static int cosa_net_open(struct net_device *dev) |
1da177e4 | 637 | { |
aca25753 | 638 | struct channel_data *chan = dev_to_chan(dev); |
1da177e4 LT |
639 | int err; |
640 | unsigned long flags; | |
641 | ||
642 | if (!(chan->cosa->firmware_status & COSA_FW_START)) { | |
9cbe50d4 JP |
643 | pr_notice("%s: start the firmware first (status %d)\n", |
644 | chan->cosa->name, chan->cosa->firmware_status); | |
1da177e4 LT |
645 | return -EPERM; |
646 | } | |
647 | spin_lock_irqsave(&chan->cosa->lock, flags); | |
648 | if (chan->usage != 0) { | |
9cbe50d4 JP |
649 | pr_warn("%s: cosa_net_open called with usage count %d\n", |
650 | chan->name, chan->usage); | |
1da177e4 LT |
651 | spin_unlock_irqrestore(&chan->cosa->lock, flags); |
652 | return -EBUSY; | |
653 | } | |
aca25753 KH |
654 | chan->setup_rx = cosa_net_setup_rx; |
655 | chan->tx_done = cosa_net_tx_done; | |
656 | chan->rx_done = cosa_net_rx_done; | |
657 | chan->usage = -1; | |
1da177e4 LT |
658 | chan->cosa->usage++; |
659 | spin_unlock_irqrestore(&chan->cosa->lock, flags); | |
660 | ||
aca25753 | 661 | err = hdlc_open(dev); |
1da177e4 LT |
662 | if (err) { |
663 | spin_lock_irqsave(&chan->cosa->lock, flags); | |
aca25753 | 664 | chan->usage = 0; |
1da177e4 | 665 | chan->cosa->usage--; |
1da177e4 LT |
666 | spin_unlock_irqrestore(&chan->cosa->lock, flags); |
667 | return err; | |
668 | } | |
669 | ||
aca25753 | 670 | netif_start_queue(dev); |
1da177e4 LT |
671 | cosa_enable_rx(chan); |
672 | return 0; | |
673 | } | |
674 | ||
d71a6749 SH |
675 | static netdev_tx_t cosa_net_tx(struct sk_buff *skb, |
676 | struct net_device *dev) | |
1da177e4 | 677 | { |
aca25753 | 678 | struct channel_data *chan = dev_to_chan(dev); |
1da177e4 LT |
679 | |
680 | netif_stop_queue(dev); | |
681 | ||
682 | chan->tx_skb = skb; | |
683 | cosa_start_tx(chan, skb->data, skb->len); | |
d71a6749 | 684 | return NETDEV_TX_OK; |
1da177e4 LT |
685 | } |
686 | ||
aca25753 | 687 | static void cosa_net_timeout(struct net_device *dev) |
1da177e4 | 688 | { |
aca25753 | 689 | struct channel_data *chan = dev_to_chan(dev); |
1da177e4 LT |
690 | |
691 | if (test_bit(RXBIT, &chan->cosa->rxtx)) { | |
aca25753 KH |
692 | chan->netdev->stats.rx_errors++; |
693 | chan->netdev->stats.rx_missed_errors++; | |
1da177e4 | 694 | } else { |
aca25753 KH |
695 | chan->netdev->stats.tx_errors++; |
696 | chan->netdev->stats.tx_aborted_errors++; | |
1da177e4 LT |
697 | } |
698 | cosa_kick(chan->cosa); | |
699 | if (chan->tx_skb) { | |
700 | dev_kfree_skb(chan->tx_skb); | |
701 | chan->tx_skb = NULL; | |
702 | } | |
703 | netif_wake_queue(dev); | |
704 | } | |
705 | ||
aca25753 | 706 | static int cosa_net_close(struct net_device *dev) |
1da177e4 | 707 | { |
aca25753 | 708 | struct channel_data *chan = dev_to_chan(dev); |
1da177e4 LT |
709 | unsigned long flags; |
710 | ||
aca25753 KH |
711 | netif_stop_queue(dev); |
712 | hdlc_close(dev); | |
1da177e4 LT |
713 | cosa_disable_rx(chan); |
714 | spin_lock_irqsave(&chan->cosa->lock, flags); | |
715 | if (chan->rx_skb) { | |
716 | kfree_skb(chan->rx_skb); | |
717 | chan->rx_skb = NULL; | |
718 | } | |
719 | if (chan->tx_skb) { | |
720 | kfree_skb(chan->tx_skb); | |
721 | chan->tx_skb = NULL; | |
722 | } | |
aca25753 | 723 | chan->usage = 0; |
1da177e4 LT |
724 | chan->cosa->usage--; |
725 | spin_unlock_irqrestore(&chan->cosa->lock, flags); | |
726 | return 0; | |
727 | } | |
728 | ||
aca25753 | 729 | static char *cosa_net_setup_rx(struct channel_data *chan, int size) |
1da177e4 LT |
730 | { |
731 | /* | |
732 | * We can safely fall back to non-dma-able memory, because we have | |
733 | * the cosa->bouncebuf pre-allocated. | |
734 | */ | |
fbbfb986 | 735 | kfree_skb(chan->rx_skb); |
1da177e4 LT |
736 | chan->rx_skb = dev_alloc_skb(size); |
737 | if (chan->rx_skb == NULL) { | |
9cbe50d4 | 738 | pr_notice("%s: Memory squeeze, dropping packet\n", chan->name); |
aca25753 | 739 | chan->netdev->stats.rx_dropped++; |
1da177e4 LT |
740 | return NULL; |
741 | } | |
aca25753 | 742 | chan->netdev->trans_start = jiffies; |
1da177e4 LT |
743 | return skb_put(chan->rx_skb, size); |
744 | } | |
745 | ||
aca25753 | 746 | static int cosa_net_rx_done(struct channel_data *chan) |
1da177e4 LT |
747 | { |
748 | if (!chan->rx_skb) { | |
9cbe50d4 | 749 | pr_warn("%s: rx_done with empty skb!\n", chan->name); |
aca25753 KH |
750 | chan->netdev->stats.rx_errors++; |
751 | chan->netdev->stats.rx_frame_errors++; | |
1da177e4 LT |
752 | return 0; |
753 | } | |
aca25753 KH |
754 | chan->rx_skb->protocol = hdlc_type_trans(chan->rx_skb, chan->netdev); |
755 | chan->rx_skb->dev = chan->netdev; | |
2f7826c0 | 756 | skb_reset_mac_header(chan->rx_skb); |
aca25753 KH |
757 | chan->netdev->stats.rx_packets++; |
758 | chan->netdev->stats.rx_bytes += chan->cosa->rxsize; | |
1da177e4 LT |
759 | netif_rx(chan->rx_skb); |
760 | chan->rx_skb = NULL; | |
1da177e4 LT |
761 | return 0; |
762 | } | |
763 | ||
764 | /* ARGSUSED */ | |
aca25753 | 765 | static int cosa_net_tx_done(struct channel_data *chan, int size) |
1da177e4 LT |
766 | { |
767 | if (!chan->tx_skb) { | |
9cbe50d4 | 768 | pr_warn("%s: tx_done with empty skb!\n", chan->name); |
aca25753 KH |
769 | chan->netdev->stats.tx_errors++; |
770 | chan->netdev->stats.tx_aborted_errors++; | |
1da177e4 LT |
771 | return 1; |
772 | } | |
773 | dev_kfree_skb_irq(chan->tx_skb); | |
774 | chan->tx_skb = NULL; | |
aca25753 KH |
775 | chan->netdev->stats.tx_packets++; |
776 | chan->netdev->stats.tx_bytes += size; | |
777 | netif_wake_queue(chan->netdev); | |
1da177e4 LT |
778 | return 1; |
779 | } | |
780 | ||
1da177e4 LT |
781 | /*---------- Character device ---------- */ |
782 | ||
1da177e4 LT |
783 | static ssize_t cosa_read(struct file *file, |
784 | char __user *buf, size_t count, loff_t *ppos) | |
785 | { | |
786 | DECLARE_WAITQUEUE(wait, current); | |
787 | unsigned long flags; | |
788 | struct channel_data *chan = file->private_data; | |
789 | struct cosa_data *cosa = chan->cosa; | |
790 | char *kbuf; | |
791 | ||
792 | if (!(cosa->firmware_status & COSA_FW_START)) { | |
9cbe50d4 JP |
793 | pr_notice("%s: start the firmware first (status %d)\n", |
794 | cosa->name, cosa->firmware_status); | |
1da177e4 LT |
795 | return -EPERM; |
796 | } | |
6387c4be | 797 | if (mutex_lock_interruptible(&chan->rlock)) |
1da177e4 LT |
798 | return -ERESTARTSYS; |
799 | ||
1d5d1fdc JP |
800 | chan->rxdata = kmalloc(COSA_MTU, GFP_DMA|GFP_KERNEL); |
801 | if (chan->rxdata == NULL) { | |
6387c4be | 802 | mutex_unlock(&chan->rlock); |
1da177e4 LT |
803 | return -ENOMEM; |
804 | } | |
805 | ||
806 | chan->rx_status = 0; | |
807 | cosa_enable_rx(chan); | |
808 | spin_lock_irqsave(&cosa->lock, flags); | |
809 | add_wait_queue(&chan->rxwaitq, &wait); | |
640462cb | 810 | while (!chan->rx_status) { |
2c45015a | 811 | set_current_state(TASK_INTERRUPTIBLE); |
1da177e4 LT |
812 | spin_unlock_irqrestore(&cosa->lock, flags); |
813 | schedule(); | |
814 | spin_lock_irqsave(&cosa->lock, flags); | |
815 | if (signal_pending(current) && chan->rx_status == 0) { | |
816 | chan->rx_status = 1; | |
817 | remove_wait_queue(&chan->rxwaitq, &wait); | |
2c45015a | 818 | __set_current_state(TASK_RUNNING); |
1da177e4 | 819 | spin_unlock_irqrestore(&cosa->lock, flags); |
6387c4be | 820 | mutex_unlock(&chan->rlock); |
1da177e4 LT |
821 | return -ERESTARTSYS; |
822 | } | |
823 | } | |
824 | remove_wait_queue(&chan->rxwaitq, &wait); | |
2c45015a | 825 | __set_current_state(TASK_RUNNING); |
1da177e4 LT |
826 | kbuf = chan->rxdata; |
827 | count = chan->rxsize; | |
828 | spin_unlock_irqrestore(&cosa->lock, flags); | |
6387c4be | 829 | mutex_unlock(&chan->rlock); |
1da177e4 LT |
830 | |
831 | if (copy_to_user(buf, kbuf, count)) { | |
832 | kfree(kbuf); | |
833 | return -EFAULT; | |
834 | } | |
835 | kfree(kbuf); | |
836 | return count; | |
837 | } | |
838 | ||
839 | static char *chrdev_setup_rx(struct channel_data *chan, int size) | |
840 | { | |
841 | /* Expect size <= COSA_MTU */ | |
842 | chan->rxsize = size; | |
843 | return chan->rxdata; | |
844 | } | |
845 | ||
846 | static int chrdev_rx_done(struct channel_data *chan) | |
847 | { | |
848 | if (chan->rx_status) { /* Reader has died */ | |
849 | kfree(chan->rxdata); | |
850 | up(&chan->wsem); | |
851 | } | |
852 | chan->rx_status = 1; | |
853 | wake_up_interruptible(&chan->rxwaitq); | |
854 | return 1; | |
855 | } | |
856 | ||
857 | ||
858 | static ssize_t cosa_write(struct file *file, | |
859 | const char __user *buf, size_t count, loff_t *ppos) | |
860 | { | |
861 | DECLARE_WAITQUEUE(wait, current); | |
862 | struct channel_data *chan = file->private_data; | |
863 | struct cosa_data *cosa = chan->cosa; | |
864 | unsigned long flags; | |
865 | char *kbuf; | |
866 | ||
867 | if (!(cosa->firmware_status & COSA_FW_START)) { | |
9cbe50d4 JP |
868 | pr_notice("%s: start the firmware first (status %d)\n", |
869 | cosa->name, cosa->firmware_status); | |
1da177e4 LT |
870 | return -EPERM; |
871 | } | |
872 | if (down_interruptible(&chan->wsem)) | |
873 | return -ERESTARTSYS; | |
874 | ||
875 | if (count > COSA_MTU) | |
876 | count = COSA_MTU; | |
877 | ||
878 | /* Allocate the buffer */ | |
1d5d1fdc JP |
879 | kbuf = kmalloc(count, GFP_KERNEL|GFP_DMA); |
880 | if (kbuf == NULL) { | |
1da177e4 LT |
881 | up(&chan->wsem); |
882 | return -ENOMEM; | |
883 | } | |
884 | if (copy_from_user(kbuf, buf, count)) { | |
885 | up(&chan->wsem); | |
886 | kfree(kbuf); | |
887 | return -EFAULT; | |
888 | } | |
889 | chan->tx_status=0; | |
890 | cosa_start_tx(chan, kbuf, count); | |
891 | ||
892 | spin_lock_irqsave(&cosa->lock, flags); | |
893 | add_wait_queue(&chan->txwaitq, &wait); | |
640462cb | 894 | while (!chan->tx_status) { |
2c45015a | 895 | set_current_state(TASK_INTERRUPTIBLE); |
1da177e4 LT |
896 | spin_unlock_irqrestore(&cosa->lock, flags); |
897 | schedule(); | |
898 | spin_lock_irqsave(&cosa->lock, flags); | |
899 | if (signal_pending(current) && chan->tx_status == 0) { | |
900 | chan->tx_status = 1; | |
901 | remove_wait_queue(&chan->txwaitq, &wait); | |
2c45015a | 902 | __set_current_state(TASK_RUNNING); |
1da177e4 LT |
903 | chan->tx_status = 1; |
904 | spin_unlock_irqrestore(&cosa->lock, flags); | |
40be261d | 905 | up(&chan->wsem); |
1da177e4 LT |
906 | return -ERESTARTSYS; |
907 | } | |
908 | } | |
909 | remove_wait_queue(&chan->txwaitq, &wait); | |
2c45015a | 910 | __set_current_state(TASK_RUNNING); |
1da177e4 LT |
911 | up(&chan->wsem); |
912 | spin_unlock_irqrestore(&cosa->lock, flags); | |
913 | kfree(kbuf); | |
914 | return count; | |
915 | } | |
916 | ||
917 | static int chrdev_tx_done(struct channel_data *chan, int size) | |
918 | { | |
919 | if (chan->tx_status) { /* Writer was interrupted */ | |
920 | kfree(chan->txbuf); | |
921 | up(&chan->wsem); | |
922 | } | |
923 | chan->tx_status = 1; | |
924 | wake_up_interruptible(&chan->txwaitq); | |
925 | return 1; | |
926 | } | |
927 | ||
928 | static unsigned int cosa_poll(struct file *file, poll_table *poll) | |
929 | { | |
9cbe50d4 | 930 | pr_info("cosa_poll is here\n"); |
1da177e4 LT |
931 | return 0; |
932 | } | |
933 | ||
934 | static int cosa_open(struct inode *inode, struct file *file) | |
935 | { | |
936 | struct cosa_data *cosa; | |
937 | struct channel_data *chan; | |
938 | unsigned long flags; | |
939 | int n; | |
09118107 | 940 | int ret = 0; |
1da177e4 | 941 | |
15fd0cd9 | 942 | mutex_lock(&cosa_chardev_mutex); |
496ad9aa | 943 | if ((n=iminor(file_inode(file))>>CARD_MINOR_BITS) |
09118107 JC |
944 | >= nr_cards) { |
945 | ret = -ENODEV; | |
946 | goto out; | |
947 | } | |
1da177e4 LT |
948 | cosa = cosa_cards+n; |
949 | ||
496ad9aa | 950 | if ((n=iminor(file_inode(file)) |
09118107 JC |
951 | & ((1<<CARD_MINOR_BITS)-1)) >= cosa->nchannels) { |
952 | ret = -ENODEV; | |
953 | goto out; | |
954 | } | |
1da177e4 LT |
955 | chan = cosa->chan + n; |
956 | ||
957 | file->private_data = chan; | |
958 | ||
959 | spin_lock_irqsave(&cosa->lock, flags); | |
960 | ||
961 | if (chan->usage < 0) { /* in netdev mode */ | |
962 | spin_unlock_irqrestore(&cosa->lock, flags); | |
09118107 JC |
963 | ret = -EBUSY; |
964 | goto out; | |
1da177e4 LT |
965 | } |
966 | cosa->usage++; | |
967 | chan->usage++; | |
968 | ||
969 | chan->tx_done = chrdev_tx_done; | |
970 | chan->setup_rx = chrdev_setup_rx; | |
971 | chan->rx_done = chrdev_rx_done; | |
972 | spin_unlock_irqrestore(&cosa->lock, flags); | |
09118107 | 973 | out: |
15fd0cd9 | 974 | mutex_unlock(&cosa_chardev_mutex); |
09118107 | 975 | return ret; |
1da177e4 LT |
976 | } |
977 | ||
978 | static int cosa_release(struct inode *inode, struct file *file) | |
979 | { | |
980 | struct channel_data *channel = file->private_data; | |
981 | struct cosa_data *cosa; | |
982 | unsigned long flags; | |
983 | ||
984 | cosa = channel->cosa; | |
985 | spin_lock_irqsave(&cosa->lock, flags); | |
986 | cosa->usage--; | |
987 | channel->usage--; | |
988 | spin_unlock_irqrestore(&cosa->lock, flags); | |
989 | return 0; | |
990 | } | |
991 | ||
992 | #ifdef COSA_FASYNC_WORKING | |
993 | static struct fasync_struct *fasync[256] = { NULL, }; | |
994 | ||
995 | /* To be done ... */ | |
996 | static int cosa_fasync(struct inode *inode, struct file *file, int on) | |
997 | { | |
998 | int port = iminor(inode); | |
60aa4924 JC |
999 | |
1000 | return fasync_helper(inode, file, on, &fasync[port]); | |
1da177e4 LT |
1001 | } |
1002 | #endif | |
1003 | ||
1004 | \f | |
1005 | /* ---------- Ioctls ---------- */ | |
1006 | ||
1007 | /* | |
1008 | * Ioctl subroutines can safely be made inline, because they are called | |
1009 | * only from cosa_ioctl(). | |
1010 | */ | |
1011 | static inline int cosa_reset(struct cosa_data *cosa) | |
1012 | { | |
1013 | char idstring[COSA_MAX_ID_STRING]; | |
1014 | if (cosa->usage > 1) | |
9cbe50d4 | 1015 | pr_info("cosa%d: WARNING: reset requested with cosa->usage > 1 (%d). Odd things may happen.\n", |
1da177e4 LT |
1016 | cosa->num, cosa->usage); |
1017 | cosa->firmware_status &= ~(COSA_FW_RESET|COSA_FW_START); | |
1018 | if (cosa_reset_and_read_id(cosa, idstring) < 0) { | |
9cbe50d4 | 1019 | pr_notice("cosa%d: reset failed\n", cosa->num); |
1da177e4 LT |
1020 | return -EIO; |
1021 | } | |
9cbe50d4 | 1022 | pr_info("cosa%d: resetting device: %s\n", cosa->num, idstring); |
1da177e4 LT |
1023 | cosa->firmware_status |= COSA_FW_RESET; |
1024 | return 0; | |
1025 | } | |
1026 | ||
1027 | /* High-level function to download data into COSA memory. Calls download() */ | |
1028 | static inline int cosa_download(struct cosa_data *cosa, void __user *arg) | |
1029 | { | |
1030 | struct cosa_download d; | |
1031 | int i; | |
1032 | ||
1033 | if (cosa->usage > 1) | |
9cbe50d4 | 1034 | pr_info("%s: WARNING: download of microcode requested with cosa->usage > 1 (%d). Odd things may happen.\n", |
1da177e4 LT |
1035 | cosa->name, cosa->usage); |
1036 | if (!(cosa->firmware_status & COSA_FW_RESET)) { | |
9cbe50d4 JP |
1037 | pr_notice("%s: reset the card first (status %d)\n", |
1038 | cosa->name, cosa->firmware_status); | |
1da177e4 LT |
1039 | return -EPERM; |
1040 | } | |
1041 | ||
1042 | if (copy_from_user(&d, arg, sizeof(d))) | |
1043 | return -EFAULT; | |
1044 | ||
1045 | if (d.addr < 0 || d.addr > COSA_MAX_FIRMWARE_SIZE) | |
1046 | return -EINVAL; | |
1047 | if (d.len < 0 || d.len > COSA_MAX_FIRMWARE_SIZE) | |
1048 | return -EINVAL; | |
1049 | ||
1050 | ||
1051 | /* If something fails, force the user to reset the card */ | |
1052 | cosa->firmware_status &= ~(COSA_FW_RESET|COSA_FW_DOWNLOAD); | |
1053 | ||
1054 | i = download(cosa, d.code, d.len, d.addr); | |
1055 | if (i < 0) { | |
9cbe50d4 JP |
1056 | pr_notice("cosa%d: microcode download failed: %d\n", |
1057 | cosa->num, i); | |
1da177e4 LT |
1058 | return -EIO; |
1059 | } | |
9cbe50d4 | 1060 | pr_info("cosa%d: downloading microcode - 0x%04x bytes at 0x%04x\n", |
1da177e4 LT |
1061 | cosa->num, d.len, d.addr); |
1062 | cosa->firmware_status |= COSA_FW_RESET|COSA_FW_DOWNLOAD; | |
1063 | return 0; | |
1064 | } | |
1065 | ||
1066 | /* High-level function to read COSA memory. Calls readmem() */ | |
1067 | static inline int cosa_readmem(struct cosa_data *cosa, void __user *arg) | |
1068 | { | |
1069 | struct cosa_download d; | |
1070 | int i; | |
1071 | ||
1072 | if (cosa->usage > 1) | |
9cbe50d4 | 1073 | pr_info("cosa%d: WARNING: readmem requested with cosa->usage > 1 (%d). Odd things may happen.\n", |
1da177e4 LT |
1074 | cosa->num, cosa->usage); |
1075 | if (!(cosa->firmware_status & COSA_FW_RESET)) { | |
9cbe50d4 JP |
1076 | pr_notice("%s: reset the card first (status %d)\n", |
1077 | cosa->name, cosa->firmware_status); | |
1da177e4 LT |
1078 | return -EPERM; |
1079 | } | |
1080 | ||
1081 | if (copy_from_user(&d, arg, sizeof(d))) | |
1082 | return -EFAULT; | |
1083 | ||
1084 | /* If something fails, force the user to reset the card */ | |
1085 | cosa->firmware_status &= ~COSA_FW_RESET; | |
1086 | ||
1087 | i = readmem(cosa, d.code, d.len, d.addr); | |
1088 | if (i < 0) { | |
9cbe50d4 | 1089 | pr_notice("cosa%d: reading memory failed: %d\n", cosa->num, i); |
1da177e4 LT |
1090 | return -EIO; |
1091 | } | |
9cbe50d4 | 1092 | pr_info("cosa%d: reading card memory - 0x%04x bytes at 0x%04x\n", |
1da177e4 LT |
1093 | cosa->num, d.len, d.addr); |
1094 | cosa->firmware_status |= COSA_FW_RESET; | |
1095 | return 0; | |
1096 | } | |
1097 | ||
1098 | /* High-level function to start microcode. Calls startmicrocode(). */ | |
1099 | static inline int cosa_start(struct cosa_data *cosa, int address) | |
1100 | { | |
1101 | int i; | |
1102 | ||
1103 | if (cosa->usage > 1) | |
9cbe50d4 | 1104 | pr_info("cosa%d: WARNING: start microcode requested with cosa->usage > 1 (%d). Odd things may happen.\n", |
1da177e4 LT |
1105 | cosa->num, cosa->usage); |
1106 | ||
1107 | if ((cosa->firmware_status & (COSA_FW_RESET|COSA_FW_DOWNLOAD)) | |
1108 | != (COSA_FW_RESET|COSA_FW_DOWNLOAD)) { | |
9cbe50d4 JP |
1109 | pr_notice("%s: download the microcode and/or reset the card first (status %d)\n", |
1110 | cosa->name, cosa->firmware_status); | |
1da177e4 LT |
1111 | return -EPERM; |
1112 | } | |
1113 | cosa->firmware_status &= ~COSA_FW_RESET; | |
1114 | if ((i=startmicrocode(cosa, address)) < 0) { | |
9cbe50d4 JP |
1115 | pr_notice("cosa%d: start microcode at 0x%04x failed: %d\n", |
1116 | cosa->num, address, i); | |
1da177e4 LT |
1117 | return -EIO; |
1118 | } | |
9cbe50d4 | 1119 | pr_info("cosa%d: starting microcode at 0x%04x\n", cosa->num, address); |
1da177e4 LT |
1120 | cosa->startaddr = address; |
1121 | cosa->firmware_status |= COSA_FW_START; | |
1122 | return 0; | |
1123 | } | |
1124 | ||
1125 | /* Buffer of size at least COSA_MAX_ID_STRING is expected */ | |
1126 | static inline int cosa_getidstr(struct cosa_data *cosa, char __user *string) | |
1127 | { | |
1128 | int l = strlen(cosa->id_string)+1; | |
1129 | if (copy_to_user(string, cosa->id_string, l)) | |
1130 | return -EFAULT; | |
1131 | return l; | |
1132 | } | |
1133 | ||
1134 | /* Buffer of size at least COSA_MAX_ID_STRING is expected */ | |
1135 | static inline int cosa_gettype(struct cosa_data *cosa, char __user *string) | |
1136 | { | |
1137 | int l = strlen(cosa->type)+1; | |
1138 | if (copy_to_user(string, cosa->type, l)) | |
1139 | return -EFAULT; | |
1140 | return l; | |
1141 | } | |
1142 | ||
1143 | static int cosa_ioctl_common(struct cosa_data *cosa, | |
1144 | struct channel_data *channel, unsigned int cmd, unsigned long arg) | |
1145 | { | |
1146 | void __user *argp = (void __user *)arg; | |
640462cb | 1147 | switch (cmd) { |
1da177e4 LT |
1148 | case COSAIORSET: /* Reset the device */ |
1149 | if (!capable(CAP_NET_ADMIN)) | |
1150 | return -EACCES; | |
1151 | return cosa_reset(cosa); | |
1152 | case COSAIOSTRT: /* Start the firmware */ | |
1153 | if (!capable(CAP_SYS_RAWIO)) | |
1154 | return -EACCES; | |
1155 | return cosa_start(cosa, arg); | |
1156 | case COSAIODOWNLD: /* Download the firmware */ | |
1157 | if (!capable(CAP_SYS_RAWIO)) | |
1158 | return -EACCES; | |
1159 | ||
1160 | return cosa_download(cosa, argp); | |
1161 | case COSAIORMEM: | |
1162 | if (!capable(CAP_SYS_RAWIO)) | |
1163 | return -EACCES; | |
1164 | return cosa_readmem(cosa, argp); | |
1165 | case COSAIORTYPE: | |
1166 | return cosa_gettype(cosa, argp); | |
1167 | case COSAIORIDSTR: | |
1168 | return cosa_getidstr(cosa, argp); | |
1169 | case COSAIONRCARDS: | |
1170 | return nr_cards; | |
1171 | case COSAIONRCHANS: | |
1172 | return cosa->nchannels; | |
1173 | case COSAIOBMSET: | |
1174 | if (!capable(CAP_SYS_RAWIO)) | |
1175 | return -EACCES; | |
1176 | if (is_8bit(cosa)) | |
1177 | return -EINVAL; | |
1178 | if (arg != COSA_BM_OFF && arg != COSA_BM_ON) | |
1179 | return -EINVAL; | |
1180 | cosa->busmaster = arg; | |
1181 | return 0; | |
1182 | case COSAIOBMGET: | |
1183 | return cosa->busmaster; | |
1184 | } | |
1185 | return -ENOIOCTLCMD; | |
1186 | } | |
1187 | ||
aca25753 | 1188 | static int cosa_net_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
1da177e4 LT |
1189 | { |
1190 | int rv; | |
aca25753 KH |
1191 | struct channel_data *chan = dev_to_chan(dev); |
1192 | rv = cosa_ioctl_common(chan->cosa, chan, cmd, | |
1193 | (unsigned long)ifr->ifr_data); | |
1194 | if (rv != -ENOIOCTLCMD) | |
1195 | return rv; | |
1196 | return hdlc_ioctl(dev, ifr, cmd); | |
1da177e4 LT |
1197 | } |
1198 | ||
2395f0e8 AC |
1199 | static long cosa_chardev_ioctl(struct file *file, unsigned int cmd, |
1200 | unsigned long arg) | |
1da177e4 LT |
1201 | { |
1202 | struct channel_data *channel = file->private_data; | |
2395f0e8 AC |
1203 | struct cosa_data *cosa; |
1204 | long ret; | |
1205 | ||
15fd0cd9 | 1206 | mutex_lock(&cosa_chardev_mutex); |
2395f0e8 AC |
1207 | cosa = channel->cosa; |
1208 | ret = cosa_ioctl_common(cosa, channel, cmd, arg); | |
15fd0cd9 | 1209 | mutex_unlock(&cosa_chardev_mutex); |
2395f0e8 | 1210 | return ret; |
1da177e4 LT |
1211 | } |
1212 | ||
1213 | \f | |
1214 | /*---------- HW layer interface ---------- */ | |
1215 | ||
1216 | /* | |
1217 | * The higher layer can bind itself to the HW layer by setting the callbacks | |
1218 | * in the channel_data structure and by using these routines. | |
1219 | */ | |
1220 | static void cosa_enable_rx(struct channel_data *chan) | |
1221 | { | |
1222 | struct cosa_data *cosa = chan->cosa; | |
1223 | ||
1224 | if (!test_and_set_bit(chan->num, &cosa->rxbitmap)) | |
1225 | put_driver_status(cosa); | |
1226 | } | |
1227 | ||
1228 | static void cosa_disable_rx(struct channel_data *chan) | |
1229 | { | |
1230 | struct cosa_data *cosa = chan->cosa; | |
1231 | ||
1232 | if (test_and_clear_bit(chan->num, &cosa->rxbitmap)) | |
1233 | put_driver_status(cosa); | |
1234 | } | |
1235 | ||
1236 | /* | |
1237 | * FIXME: This routine probably should check for cosa_start_tx() called when | |
1238 | * the previous transmit is still unfinished. In this case the non-zero | |
1239 | * return value should indicate to the caller that the queuing(sp?) up | |
1240 | * the transmit has failed. | |
1241 | */ | |
1242 | static int cosa_start_tx(struct channel_data *chan, char *buf, int len) | |
1243 | { | |
1244 | struct cosa_data *cosa = chan->cosa; | |
1245 | unsigned long flags; | |
1246 | #ifdef DEBUG_DATA | |
1247 | int i; | |
1248 | ||
9cbe50d4 JP |
1249 | pr_info("cosa%dc%d: starting tx(0x%x)", |
1250 | chan->cosa->num, chan->num, len); | |
1da177e4 | 1251 | for (i=0; i<len; i++) |
9cbe50d4 JP |
1252 | pr_cont(" %02x", buf[i]&0xff); |
1253 | pr_cont("\n"); | |
1da177e4 LT |
1254 | #endif |
1255 | spin_lock_irqsave(&cosa->lock, flags); | |
1256 | chan->txbuf = buf; | |
1257 | chan->txsize = len; | |
1258 | if (len > COSA_MTU) | |
1259 | chan->txsize = COSA_MTU; | |
1260 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1261 | ||
1262 | /* Tell the firmware we are ready */ | |
1263 | set_bit(chan->num, &cosa->txbitmap); | |
1264 | put_driver_status(cosa); | |
1265 | ||
1266 | return 0; | |
1267 | } | |
1268 | ||
1269 | static void put_driver_status(struct cosa_data *cosa) | |
1270 | { | |
1271 | unsigned long flags; | |
1272 | int status; | |
1273 | ||
1274 | spin_lock_irqsave(&cosa->lock, flags); | |
1275 | ||
1276 | status = (cosa->rxbitmap ? DRIVER_RX_READY : 0) | |
1277 | | (cosa->txbitmap ? DRIVER_TX_READY : 0) | |
1278 | | (cosa->txbitmap? ~(cosa->txbitmap<<DRIVER_TXMAP_SHIFT) | |
1279 | &DRIVER_TXMAP_MASK : 0); | |
1280 | if (!cosa->rxtx) { | |
1281 | if (cosa->rxbitmap|cosa->txbitmap) { | |
1282 | if (!cosa->enabled) { | |
1283 | cosa_putstatus(cosa, SR_RX_INT_ENA); | |
1284 | #ifdef DEBUG_IO | |
1285 | debug_status_out(cosa, SR_RX_INT_ENA); | |
1286 | #endif | |
1287 | cosa->enabled = 1; | |
1288 | } | |
1289 | } else if (cosa->enabled) { | |
1290 | cosa->enabled = 0; | |
1291 | cosa_putstatus(cosa, 0); | |
1292 | #ifdef DEBUG_IO | |
1293 | debug_status_out(cosa, 0); | |
1294 | #endif | |
1295 | } | |
1296 | cosa_putdata8(cosa, status); | |
1297 | #ifdef DEBUG_IO | |
1298 | debug_data_cmd(cosa, status); | |
1299 | #endif | |
1300 | } | |
1301 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1302 | } | |
1303 | ||
1304 | static void put_driver_status_nolock(struct cosa_data *cosa) | |
1305 | { | |
1306 | int status; | |
1307 | ||
1308 | status = (cosa->rxbitmap ? DRIVER_RX_READY : 0) | |
1309 | | (cosa->txbitmap ? DRIVER_TX_READY : 0) | |
1310 | | (cosa->txbitmap? ~(cosa->txbitmap<<DRIVER_TXMAP_SHIFT) | |
1311 | &DRIVER_TXMAP_MASK : 0); | |
1312 | ||
1313 | if (cosa->rxbitmap|cosa->txbitmap) { | |
1314 | cosa_putstatus(cosa, SR_RX_INT_ENA); | |
1315 | #ifdef DEBUG_IO | |
1316 | debug_status_out(cosa, SR_RX_INT_ENA); | |
1317 | #endif | |
1318 | cosa->enabled = 1; | |
1319 | } else { | |
1320 | cosa_putstatus(cosa, 0); | |
1321 | #ifdef DEBUG_IO | |
1322 | debug_status_out(cosa, 0); | |
1323 | #endif | |
1324 | cosa->enabled = 0; | |
1325 | } | |
1326 | cosa_putdata8(cosa, status); | |
1327 | #ifdef DEBUG_IO | |
1328 | debug_data_cmd(cosa, status); | |
1329 | #endif | |
1330 | } | |
1331 | ||
1332 | /* | |
1333 | * The "kickme" function: When the DMA times out, this is called to | |
1334 | * clean up the driver status. | |
1335 | * FIXME: Preliminary support, the interface is probably wrong. | |
1336 | */ | |
1337 | static void cosa_kick(struct cosa_data *cosa) | |
1338 | { | |
1339 | unsigned long flags, flags1; | |
1340 | char *s = "(probably) IRQ"; | |
1341 | ||
1342 | if (test_bit(RXBIT, &cosa->rxtx)) | |
1343 | s = "RX DMA"; | |
1344 | if (test_bit(TXBIT, &cosa->rxtx)) | |
1345 | s = "TX DMA"; | |
1346 | ||
9cbe50d4 | 1347 | pr_info("%s: %s timeout - restarting\n", cosa->name, s); |
1da177e4 LT |
1348 | spin_lock_irqsave(&cosa->lock, flags); |
1349 | cosa->rxtx = 0; | |
1350 | ||
1351 | flags1 = claim_dma_lock(); | |
1352 | disable_dma(cosa->dma); | |
1353 | clear_dma_ff(cosa->dma); | |
1354 | release_dma_lock(flags1); | |
1355 | ||
1356 | /* FIXME: Anything else? */ | |
1357 | udelay(100); | |
1358 | cosa_putstatus(cosa, 0); | |
1359 | udelay(100); | |
1360 | (void) cosa_getdata8(cosa); | |
1361 | udelay(100); | |
1362 | cosa_putdata8(cosa, 0); | |
1363 | udelay(100); | |
1364 | put_driver_status_nolock(cosa); | |
1365 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1366 | } | |
1367 | ||
1368 | /* | |
1369 | * Check if the whole buffer is DMA-able. It means it is below the 16M of | |
1370 | * physical memory and doesn't span the 64k boundary. For now it seems | |
1371 | * SKB's never do this, but we'll check this anyway. | |
1372 | */ | |
1373 | static int cosa_dma_able(struct channel_data *chan, char *buf, int len) | |
1374 | { | |
1375 | static int count; | |
1376 | unsigned long b = (unsigned long)buf; | |
1377 | if (b+len >= MAX_DMA_ADDRESS) | |
1378 | return 0; | |
1379 | if ((b^ (b+len)) & 0x10000) { | |
1380 | if (count++ < 5) | |
9cbe50d4 | 1381 | pr_info("%s: packet spanning a 64k boundary\n", |
1da177e4 LT |
1382 | chan->name); |
1383 | return 0; | |
1384 | } | |
1385 | return 1; | |
1386 | } | |
1387 | ||
1388 | \f | |
1389 | /* ---------- The SRP/COSA ROM monitor functions ---------- */ | |
1390 | ||
1391 | /* | |
1392 | * Downloading SRP microcode: say "w" to SRP monitor, it answers by "w=", | |
1393 | * drivers need to say 4-digit hex number meaning start address of the microcode | |
1394 | * separated by a single space. Monitor replies by saying " =". Now driver | |
1395 | * has to write 4-digit hex number meaning the last byte address ended | |
1396 | * by a single space. Monitor has to reply with a space. Now the download | |
1397 | * begins. After the download monitor replies with "\r\n." (CR LF dot). | |
1398 | */ | |
1399 | static int download(struct cosa_data *cosa, const char __user *microcode, int length, int address) | |
1400 | { | |
1401 | int i; | |
1402 | ||
1403 | if (put_wait_data(cosa, 'w') == -1) return -1; | |
1404 | if ((i=get_wait_data(cosa)) != 'w') { printk("dnld: 0x%04x\n",i); return -2;} | |
1405 | if (get_wait_data(cosa) != '=') return -3; | |
1406 | ||
1407 | if (puthexnumber(cosa, address) < 0) return -4; | |
1408 | if (put_wait_data(cosa, ' ') == -1) return -10; | |
1409 | if (get_wait_data(cosa) != ' ') return -11; | |
1410 | if (get_wait_data(cosa) != '=') return -12; | |
1411 | ||
1412 | if (puthexnumber(cosa, address+length-1) < 0) return -13; | |
1413 | if (put_wait_data(cosa, ' ') == -1) return -18; | |
1414 | if (get_wait_data(cosa) != ' ') return -19; | |
1415 | ||
1416 | while (length--) { | |
1417 | char c; | |
1418 | #ifndef SRP_DOWNLOAD_AT_BOOT | |
1419 | if (get_user(c, microcode)) | |
1420 | return -23; /* ??? */ | |
1421 | #else | |
1422 | c = *microcode; | |
1423 | #endif | |
1424 | if (put_wait_data(cosa, c) == -1) | |
1425 | return -20; | |
1426 | microcode++; | |
1427 | } | |
1428 | ||
1429 | if (get_wait_data(cosa) != '\r') return -21; | |
1430 | if (get_wait_data(cosa) != '\n') return -22; | |
1431 | if (get_wait_data(cosa) != '.') return -23; | |
1432 | #if 0 | |
1433 | printk(KERN_DEBUG "cosa%d: download completed.\n", cosa->num); | |
1434 | #endif | |
1435 | return 0; | |
1436 | } | |
1437 | ||
1438 | ||
1439 | /* | |
1440 | * Starting microcode is done via the "g" command of the SRP monitor. | |
1441 | * The chat should be the following: "g" "g=" "<addr><CR>" | |
1442 | * "<CR><CR><LF><CR><LF>". | |
1443 | */ | |
1444 | static int startmicrocode(struct cosa_data *cosa, int address) | |
1445 | { | |
1446 | if (put_wait_data(cosa, 'g') == -1) return -1; | |
1447 | if (get_wait_data(cosa) != 'g') return -2; | |
1448 | if (get_wait_data(cosa) != '=') return -3; | |
1449 | ||
1450 | if (puthexnumber(cosa, address) < 0) return -4; | |
1451 | if (put_wait_data(cosa, '\r') == -1) return -5; | |
1452 | ||
1453 | if (get_wait_data(cosa) != '\r') return -6; | |
1454 | if (get_wait_data(cosa) != '\r') return -7; | |
1455 | if (get_wait_data(cosa) != '\n') return -8; | |
1456 | if (get_wait_data(cosa) != '\r') return -9; | |
1457 | if (get_wait_data(cosa) != '\n') return -10; | |
1458 | #if 0 | |
1459 | printk(KERN_DEBUG "cosa%d: microcode started\n", cosa->num); | |
1460 | #endif | |
1461 | return 0; | |
1462 | } | |
1463 | ||
1464 | /* | |
1465 | * Reading memory is done via the "r" command of the SRP monitor. | |
1466 | * The chat is the following "r" "r=" "<addr> " " =" "<last_byte> " " " | |
1467 | * Then driver can read the data and the conversation is finished | |
1468 | * by SRP monitor sending "<CR><LF>." (dot at the end). | |
1469 | * | |
1470 | * This routine is not needed during the normal operation and serves | |
1471 | * for debugging purposes only. | |
1472 | */ | |
1473 | static int readmem(struct cosa_data *cosa, char __user *microcode, int length, int address) | |
1474 | { | |
1475 | if (put_wait_data(cosa, 'r') == -1) return -1; | |
1476 | if ((get_wait_data(cosa)) != 'r') return -2; | |
1477 | if ((get_wait_data(cosa)) != '=') return -3; | |
1478 | ||
1479 | if (puthexnumber(cosa, address) < 0) return -4; | |
1480 | if (put_wait_data(cosa, ' ') == -1) return -5; | |
1481 | if (get_wait_data(cosa) != ' ') return -6; | |
1482 | if (get_wait_data(cosa) != '=') return -7; | |
1483 | ||
1484 | if (puthexnumber(cosa, address+length-1) < 0) return -8; | |
1485 | if (put_wait_data(cosa, ' ') == -1) return -9; | |
1486 | if (get_wait_data(cosa) != ' ') return -10; | |
1487 | ||
1488 | while (length--) { | |
1489 | char c; | |
1490 | int i; | |
1491 | if ((i=get_wait_data(cosa)) == -1) { | |
9cbe50d4 | 1492 | pr_info("0x%04x bytes remaining\n", length); |
1da177e4 LT |
1493 | return -11; |
1494 | } | |
1495 | c=i; | |
1496 | #if 1 | |
1497 | if (put_user(c, microcode)) | |
1498 | return -23; /* ??? */ | |
1499 | #else | |
1500 | *microcode = c; | |
1501 | #endif | |
1502 | microcode++; | |
1503 | } | |
1504 | ||
1505 | if (get_wait_data(cosa) != '\r') return -21; | |
1506 | if (get_wait_data(cosa) != '\n') return -22; | |
1507 | if (get_wait_data(cosa) != '.') return -23; | |
1508 | #if 0 | |
1509 | printk(KERN_DEBUG "cosa%d: readmem completed.\n", cosa->num); | |
1510 | #endif | |
1511 | return 0; | |
1512 | } | |
1513 | ||
1514 | /* | |
1515 | * This function resets the device and reads the initial prompt | |
1516 | * of the device's ROM monitor. | |
1517 | */ | |
1518 | static int cosa_reset_and_read_id(struct cosa_data *cosa, char *idstring) | |
1519 | { | |
1520 | int i=0, id=0, prev=0, curr=0; | |
1521 | ||
1522 | /* Reset the card ... */ | |
1523 | cosa_putstatus(cosa, 0); | |
1524 | cosa_getdata8(cosa); | |
1525 | cosa_putstatus(cosa, SR_RST); | |
1da177e4 | 1526 | msleep(500); |
1da177e4 LT |
1527 | /* Disable all IRQs from the card */ |
1528 | cosa_putstatus(cosa, 0); | |
1529 | ||
1530 | /* | |
1531 | * Try to read the ID string. The card then prints out the | |
1532 | * identification string ended by the "\n\x2e". | |
1533 | * | |
1534 | * The following loop is indexed through i (instead of id) | |
1535 | * to avoid looping forever when for any reason | |
1536 | * the port returns '\r', '\n' or '\x2e' permanently. | |
1537 | */ | |
1538 | for (i=0; i<COSA_MAX_ID_STRING-1; i++, prev=curr) { | |
1539 | if ((curr = get_wait_data(cosa)) == -1) { | |
1540 | return -1; | |
1541 | } | |
1542 | curr &= 0xff; | |
1543 | if (curr != '\r' && curr != '\n' && curr != 0x2e) | |
1544 | idstring[id++] = curr; | |
1545 | if (curr == 0x2e && prev == '\n') | |
1546 | break; | |
1547 | } | |
1548 | /* Perhaps we should fail when i==COSA_MAX_ID_STRING-1 ? */ | |
1549 | idstring[id] = '\0'; | |
1550 | return id; | |
1551 | } | |
1552 | ||
1553 | \f | |
1554 | /* ---------- Auxiliary routines for COSA/SRP monitor ---------- */ | |
1555 | ||
1556 | /* | |
1557 | * This routine gets the data byte from the card waiting for the SR_RX_RDY | |
1558 | * bit to be set in a loop. It should be used in the exceptional cases | |
1559 | * only (for example when resetting the card or downloading the firmware. | |
1560 | */ | |
1561 | static int get_wait_data(struct cosa_data *cosa) | |
1562 | { | |
1563 | int retries = 1000; | |
1564 | ||
1565 | while (--retries) { | |
1566 | /* read data and return them */ | |
1567 | if (cosa_getstatus(cosa) & SR_RX_RDY) { | |
1568 | short r; | |
1569 | r = cosa_getdata8(cosa); | |
1570 | #if 0 | |
9cbe50d4 JP |
1571 | pr_info("get_wait_data returning after %d retries\n", |
1572 | 999-retries); | |
1da177e4 LT |
1573 | #endif |
1574 | return r; | |
1575 | } | |
1576 | /* sleep if not ready to read */ | |
3173c890 | 1577 | schedule_timeout_interruptible(1); |
1da177e4 | 1578 | } |
9cbe50d4 | 1579 | pr_info("timeout in get_wait_data (status 0x%x)\n", |
1da177e4 LT |
1580 | cosa_getstatus(cosa)); |
1581 | return -1; | |
1582 | } | |
1583 | ||
1584 | /* | |
1585 | * This routine puts the data byte to the card waiting for the SR_TX_RDY | |
1586 | * bit to be set in a loop. It should be used in the exceptional cases | |
1587 | * only (for example when resetting the card or downloading the firmware). | |
1588 | */ | |
1589 | static int put_wait_data(struct cosa_data *cosa, int data) | |
1590 | { | |
1591 | int retries = 1000; | |
1592 | while (--retries) { | |
1593 | /* read data and return them */ | |
1594 | if (cosa_getstatus(cosa) & SR_TX_RDY) { | |
1595 | cosa_putdata8(cosa, data); | |
1596 | #if 0 | |
9cbe50d4 | 1597 | pr_info("Putdata: %d retries\n", 999-retries); |
1da177e4 LT |
1598 | #endif |
1599 | return 0; | |
1600 | } | |
1601 | #if 0 | |
1602 | /* sleep if not ready to read */ | |
3173c890 | 1603 | schedule_timeout_interruptible(1); |
1da177e4 LT |
1604 | #endif |
1605 | } | |
9cbe50d4 | 1606 | pr_info("cosa%d: timeout in put_wait_data (status 0x%x)\n", |
1da177e4 LT |
1607 | cosa->num, cosa_getstatus(cosa)); |
1608 | return -1; | |
1609 | } | |
1610 | ||
1611 | /* | |
1612 | * The following routine puts the hexadecimal number into the SRP monitor | |
1613 | * and verifies the proper echo of the sent bytes. Returns 0 on success, | |
1614 | * negative number on failure (-1,-3,-5,-7) means that put_wait_data() failed, | |
1615 | * (-2,-4,-6,-8) means that reading echo failed. | |
1616 | */ | |
1617 | static int puthexnumber(struct cosa_data *cosa, int number) | |
1618 | { | |
1619 | char temp[5]; | |
1620 | int i; | |
1621 | ||
1622 | /* Well, I should probably replace this by something faster. */ | |
1623 | sprintf(temp, "%04X", number); | |
1624 | for (i=0; i<4; i++) { | |
1625 | if (put_wait_data(cosa, temp[i]) == -1) { | |
9cbe50d4 JP |
1626 | pr_notice("cosa%d: puthexnumber failed to write byte %d\n", |
1627 | cosa->num, i); | |
1da177e4 LT |
1628 | return -1-2*i; |
1629 | } | |
1630 | if (get_wait_data(cosa) != temp[i]) { | |
9cbe50d4 JP |
1631 | pr_notice("cosa%d: puthexhumber failed to read echo of byte %d\n", |
1632 | cosa->num, i); | |
1da177e4 LT |
1633 | return -2-2*i; |
1634 | } | |
1635 | } | |
1636 | return 0; | |
1637 | } | |
1638 | ||
1639 | \f | |
1640 | /* ---------- Interrupt routines ---------- */ | |
1641 | ||
1642 | /* | |
1643 | * There are three types of interrupt: | |
1644 | * At the beginning of transmit - this handled is in tx_interrupt(), | |
1645 | * at the beginning of receive - it is in rx_interrupt() and | |
1646 | * at the end of transmit/receive - it is the eot_interrupt() function. | |
1647 | * These functions are multiplexed by cosa_interrupt() according to the | |
1648 | * COSA status byte. I have moved the rx/tx/eot interrupt handling into | |
1649 | * separate functions to make it more readable. These functions are inline, | |
1650 | * so there should be no overhead of function call. | |
1651 | * | |
1652 | * In the COSA bus-master mode, we need to tell the card the address of a | |
1653 | * buffer. Unfortunately, COSA may be too slow for us, so we must busy-wait. | |
1654 | * It's time to use the bottom half :-( | |
1655 | */ | |
1656 | ||
1657 | /* | |
1658 | * Transmit interrupt routine - called when COSA is willing to obtain | |
1659 | * data from the OS. The most tricky part of the routine is selection | |
1660 | * of channel we (OS) want to send packet for. For SRP we should probably | |
1661 | * use the round-robin approach. The newer COSA firmwares have a simple | |
1662 | * flow-control - in the status word has bits 2 and 3 set to 1 means that the | |
1663 | * channel 0 or 1 doesn't want to receive data. | |
1664 | * | |
1665 | * It seems there is a bug in COSA firmware (need to trace it further): | |
1666 | * When the driver status says that the kernel has no more data for transmit | |
1667 | * (e.g. at the end of TX DMA) and then the kernel changes its mind | |
1668 | * (e.g. new packet is queued to hard_start_xmit()), the card issues | |
1669 | * the TX interrupt but does not mark the channel as ready-to-transmit. | |
1670 | * The fix seems to be to push the packet to COSA despite its request. | |
1671 | * We first try to obey the card's opinion, and then fall back to forced TX. | |
1672 | */ | |
1673 | static inline void tx_interrupt(struct cosa_data *cosa, int status) | |
1674 | { | |
1675 | unsigned long flags, flags1; | |
1676 | #ifdef DEBUG_IRQS | |
9cbe50d4 | 1677 | pr_info("cosa%d: SR_DOWN_REQUEST status=0x%04x\n", cosa->num, status); |
1da177e4 LT |
1678 | #endif |
1679 | spin_lock_irqsave(&cosa->lock, flags); | |
1680 | set_bit(TXBIT, &cosa->rxtx); | |
1681 | if (!test_bit(IRQBIT, &cosa->rxtx)) { | |
1682 | /* flow control, see the comment above */ | |
1683 | int i=0; | |
1684 | if (!cosa->txbitmap) { | |
9cbe50d4 | 1685 | pr_warn("%s: No channel wants data in TX IRQ. Expect DMA timeout.\n", |
1da177e4 LT |
1686 | cosa->name); |
1687 | put_driver_status_nolock(cosa); | |
1688 | clear_bit(TXBIT, &cosa->rxtx); | |
1689 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1690 | return; | |
1691 | } | |
640462cb | 1692 | while (1) { |
1da177e4 LT |
1693 | cosa->txchan++; |
1694 | i++; | |
1695 | if (cosa->txchan >= cosa->nchannels) | |
1696 | cosa->txchan = 0; | |
1697 | if (!(cosa->txbitmap & (1<<cosa->txchan))) | |
1698 | continue; | |
1699 | if (~status & (1 << (cosa->txchan+DRIVER_TXMAP_SHIFT))) | |
1700 | break; | |
1701 | /* in second pass, accept first ready-to-TX channel */ | |
1702 | if (i > cosa->nchannels) { | |
1703 | /* Can be safely ignored */ | |
1704 | #ifdef DEBUG_IRQS | |
1705 | printk(KERN_DEBUG "%s: Forcing TX " | |
1706 | "to not-ready channel %d\n", | |
1707 | cosa->name, cosa->txchan); | |
1708 | #endif | |
1709 | break; | |
1710 | } | |
1711 | } | |
1712 | ||
1713 | cosa->txsize = cosa->chan[cosa->txchan].txsize; | |
1714 | if (cosa_dma_able(cosa->chan+cosa->txchan, | |
1715 | cosa->chan[cosa->txchan].txbuf, cosa->txsize)) { | |
1716 | cosa->txbuf = cosa->chan[cosa->txchan].txbuf; | |
1717 | } else { | |
1718 | memcpy(cosa->bouncebuf, cosa->chan[cosa->txchan].txbuf, | |
1719 | cosa->txsize); | |
1720 | cosa->txbuf = cosa->bouncebuf; | |
1721 | } | |
1722 | } | |
1723 | ||
1724 | if (is_8bit(cosa)) { | |
1725 | if (!test_bit(IRQBIT, &cosa->rxtx)) { | |
1726 | cosa_putstatus(cosa, SR_TX_INT_ENA); | |
1727 | cosa_putdata8(cosa, ((cosa->txchan << 5) & 0xe0)| | |
1728 | ((cosa->txsize >> 8) & 0x1f)); | |
1729 | #ifdef DEBUG_IO | |
1730 | debug_status_out(cosa, SR_TX_INT_ENA); | |
1731 | debug_data_out(cosa, ((cosa->txchan << 5) & 0xe0)| | |
1732 | ((cosa->txsize >> 8) & 0x1f)); | |
1733 | debug_data_in(cosa, cosa_getdata8(cosa)); | |
1734 | #else | |
1735 | cosa_getdata8(cosa); | |
1736 | #endif | |
1737 | set_bit(IRQBIT, &cosa->rxtx); | |
1738 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1739 | return; | |
1740 | } else { | |
1741 | clear_bit(IRQBIT, &cosa->rxtx); | |
1742 | cosa_putstatus(cosa, 0); | |
1743 | cosa_putdata8(cosa, cosa->txsize&0xff); | |
1744 | #ifdef DEBUG_IO | |
1745 | debug_status_out(cosa, 0); | |
1746 | debug_data_out(cosa, cosa->txsize&0xff); | |
1747 | #endif | |
1748 | } | |
1749 | } else { | |
1750 | cosa_putstatus(cosa, SR_TX_INT_ENA); | |
1751 | cosa_putdata16(cosa, ((cosa->txchan<<13) & 0xe000) | |
1752 | | (cosa->txsize & 0x1fff)); | |
1753 | #ifdef DEBUG_IO | |
1754 | debug_status_out(cosa, SR_TX_INT_ENA); | |
1755 | debug_data_out(cosa, ((cosa->txchan<<13) & 0xe000) | |
1756 | | (cosa->txsize & 0x1fff)); | |
1757 | debug_data_in(cosa, cosa_getdata8(cosa)); | |
1758 | debug_status_out(cosa, 0); | |
1759 | #else | |
1760 | cosa_getdata8(cosa); | |
1761 | #endif | |
1762 | cosa_putstatus(cosa, 0); | |
1763 | } | |
1764 | ||
1765 | if (cosa->busmaster) { | |
1766 | unsigned long addr = virt_to_bus(cosa->txbuf); | |
1767 | int count=0; | |
9cbe50d4 | 1768 | pr_info("busmaster IRQ\n"); |
1da177e4 LT |
1769 | while (!(cosa_getstatus(cosa)&SR_TX_RDY)) { |
1770 | count++; | |
1771 | udelay(10); | |
1772 | if (count > 1000) break; | |
1773 | } | |
9cbe50d4 JP |
1774 | pr_info("status %x\n", cosa_getstatus(cosa)); |
1775 | pr_info("ready after %d loops\n", count); | |
1da177e4 LT |
1776 | cosa_putdata16(cosa, (addr >> 16)&0xffff); |
1777 | ||
1778 | count = 0; | |
1779 | while (!(cosa_getstatus(cosa)&SR_TX_RDY)) { | |
1780 | count++; | |
1781 | if (count > 1000) break; | |
1782 | udelay(10); | |
1783 | } | |
9cbe50d4 | 1784 | pr_info("ready after %d loops\n", count); |
1da177e4 LT |
1785 | cosa_putdata16(cosa, addr &0xffff); |
1786 | flags1 = claim_dma_lock(); | |
1787 | set_dma_mode(cosa->dma, DMA_MODE_CASCADE); | |
1788 | enable_dma(cosa->dma); | |
1789 | release_dma_lock(flags1); | |
1790 | } else { | |
1791 | /* start the DMA */ | |
1792 | flags1 = claim_dma_lock(); | |
1793 | disable_dma(cosa->dma); | |
1794 | clear_dma_ff(cosa->dma); | |
1795 | set_dma_mode(cosa->dma, DMA_MODE_WRITE); | |
1796 | set_dma_addr(cosa->dma, virt_to_bus(cosa->txbuf)); | |
1797 | set_dma_count(cosa->dma, cosa->txsize); | |
1798 | enable_dma(cosa->dma); | |
1799 | release_dma_lock(flags1); | |
1800 | } | |
1801 | cosa_putstatus(cosa, SR_TX_DMA_ENA|SR_USR_INT_ENA); | |
1802 | #ifdef DEBUG_IO | |
1803 | debug_status_out(cosa, SR_TX_DMA_ENA|SR_USR_INT_ENA); | |
1804 | #endif | |
1805 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1806 | } | |
1807 | ||
1808 | static inline void rx_interrupt(struct cosa_data *cosa, int status) | |
1809 | { | |
1810 | unsigned long flags; | |
1811 | #ifdef DEBUG_IRQS | |
9cbe50d4 | 1812 | pr_info("cosa%d: SR_UP_REQUEST\n", cosa->num); |
1da177e4 LT |
1813 | #endif |
1814 | ||
1815 | spin_lock_irqsave(&cosa->lock, flags); | |
1816 | set_bit(RXBIT, &cosa->rxtx); | |
1817 | ||
1818 | if (is_8bit(cosa)) { | |
1819 | if (!test_bit(IRQBIT, &cosa->rxtx)) { | |
1820 | set_bit(IRQBIT, &cosa->rxtx); | |
1821 | put_driver_status_nolock(cosa); | |
1822 | cosa->rxsize = cosa_getdata8(cosa) <<8; | |
1823 | #ifdef DEBUG_IO | |
1824 | debug_data_in(cosa, cosa->rxsize >> 8); | |
1825 | #endif | |
1826 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1827 | return; | |
1828 | } else { | |
1829 | clear_bit(IRQBIT, &cosa->rxtx); | |
1830 | cosa->rxsize |= cosa_getdata8(cosa) & 0xff; | |
1831 | #ifdef DEBUG_IO | |
1832 | debug_data_in(cosa, cosa->rxsize & 0xff); | |
1833 | #endif | |
1834 | #if 0 | |
9cbe50d4 | 1835 | pr_info("cosa%d: receive rxsize = (0x%04x)\n", |
1da177e4 LT |
1836 | cosa->num, cosa->rxsize); |
1837 | #endif | |
1838 | } | |
1839 | } else { | |
1840 | cosa->rxsize = cosa_getdata16(cosa); | |
1841 | #ifdef DEBUG_IO | |
1842 | debug_data_in(cosa, cosa->rxsize); | |
1843 | #endif | |
1844 | #if 0 | |
9cbe50d4 | 1845 | pr_info("cosa%d: receive rxsize = (0x%04x)\n", |
1da177e4 LT |
1846 | cosa->num, cosa->rxsize); |
1847 | #endif | |
1848 | } | |
1849 | if (((cosa->rxsize & 0xe000) >> 13) >= cosa->nchannels) { | |
9cbe50d4 | 1850 | pr_warn("%s: rx for unknown channel (0x%04x)\n", |
1da177e4 LT |
1851 | cosa->name, cosa->rxsize); |
1852 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1853 | goto reject; | |
1854 | } | |
1855 | cosa->rxchan = cosa->chan + ((cosa->rxsize & 0xe000) >> 13); | |
1856 | cosa->rxsize &= 0x1fff; | |
1857 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1858 | ||
1859 | cosa->rxbuf = NULL; | |
1860 | if (cosa->rxchan->setup_rx) | |
1861 | cosa->rxbuf = cosa->rxchan->setup_rx(cosa->rxchan, cosa->rxsize); | |
1862 | ||
1863 | if (!cosa->rxbuf) { | |
1864 | reject: /* Reject the packet */ | |
9cbe50d4 | 1865 | pr_info("cosa%d: rejecting packet on channel %d\n", |
1da177e4 LT |
1866 | cosa->num, cosa->rxchan->num); |
1867 | cosa->rxbuf = cosa->bouncebuf; | |
1868 | } | |
1869 | ||
1870 | /* start the DMA */ | |
1871 | flags = claim_dma_lock(); | |
1872 | disable_dma(cosa->dma); | |
1873 | clear_dma_ff(cosa->dma); | |
1874 | set_dma_mode(cosa->dma, DMA_MODE_READ); | |
1875 | if (cosa_dma_able(cosa->rxchan, cosa->rxbuf, cosa->rxsize & 0x1fff)) { | |
1876 | set_dma_addr(cosa->dma, virt_to_bus(cosa->rxbuf)); | |
1877 | } else { | |
1878 | set_dma_addr(cosa->dma, virt_to_bus(cosa->bouncebuf)); | |
1879 | } | |
1880 | set_dma_count(cosa->dma, (cosa->rxsize&0x1fff)); | |
1881 | enable_dma(cosa->dma); | |
1882 | release_dma_lock(flags); | |
1883 | spin_lock_irqsave(&cosa->lock, flags); | |
1884 | cosa_putstatus(cosa, SR_RX_DMA_ENA|SR_USR_INT_ENA); | |
1885 | if (!is_8bit(cosa) && (status & SR_TX_RDY)) | |
1886 | cosa_putdata8(cosa, DRIVER_RX_READY); | |
1887 | #ifdef DEBUG_IO | |
1888 | debug_status_out(cosa, SR_RX_DMA_ENA|SR_USR_INT_ENA); | |
1889 | if (!is_8bit(cosa) && (status & SR_TX_RDY)) | |
1890 | debug_data_cmd(cosa, DRIVER_RX_READY); | |
1891 | #endif | |
1892 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1893 | } | |
1894 | ||
1895 | static inline void eot_interrupt(struct cosa_data *cosa, int status) | |
1896 | { | |
1897 | unsigned long flags, flags1; | |
1898 | spin_lock_irqsave(&cosa->lock, flags); | |
1899 | flags1 = claim_dma_lock(); | |
1900 | disable_dma(cosa->dma); | |
1901 | clear_dma_ff(cosa->dma); | |
1902 | release_dma_lock(flags1); | |
1903 | if (test_bit(TXBIT, &cosa->rxtx)) { | |
1904 | struct channel_data *chan = cosa->chan+cosa->txchan; | |
1905 | if (chan->tx_done) | |
1906 | if (chan->tx_done(chan, cosa->txsize)) | |
1907 | clear_bit(chan->num, &cosa->txbitmap); | |
1908 | } else if (test_bit(RXBIT, &cosa->rxtx)) { | |
1909 | #ifdef DEBUG_DATA | |
1910 | { | |
1911 | int i; | |
9cbe50d4 JP |
1912 | pr_info("cosa%dc%d: done rx(0x%x)", |
1913 | cosa->num, cosa->rxchan->num, cosa->rxsize); | |
1da177e4 | 1914 | for (i=0; i<cosa->rxsize; i++) |
9cbe50d4 JP |
1915 | pr_cont(" %02x", cosa->rxbuf[i]&0xff); |
1916 | pr_cont("\n"); | |
1da177e4 LT |
1917 | } |
1918 | #endif | |
1919 | /* Packet for unknown channel? */ | |
1920 | if (cosa->rxbuf == cosa->bouncebuf) | |
1921 | goto out; | |
1922 | if (!cosa_dma_able(cosa->rxchan, cosa->rxbuf, cosa->rxsize)) | |
1923 | memcpy(cosa->rxbuf, cosa->bouncebuf, cosa->rxsize); | |
1924 | if (cosa->rxchan->rx_done) | |
1925 | if (cosa->rxchan->rx_done(cosa->rxchan)) | |
1926 | clear_bit(cosa->rxchan->num, &cosa->rxbitmap); | |
1927 | } else { | |
9cbe50d4 | 1928 | pr_notice("cosa%d: unexpected EOT interrupt\n", cosa->num); |
1da177e4 LT |
1929 | } |
1930 | /* | |
1931 | * Clear the RXBIT, TXBIT and IRQBIT (the latest should be | |
1932 | * cleared anyway). We should do it as soon as possible | |
1933 | * so that we can tell the COSA we are done and to give it a time | |
1934 | * for recovery. | |
1935 | */ | |
1936 | out: | |
1937 | cosa->rxtx = 0; | |
1938 | put_driver_status_nolock(cosa); | |
1939 | spin_unlock_irqrestore(&cosa->lock, flags); | |
1940 | } | |
1941 | ||
7d12e780 | 1942 | static irqreturn_t cosa_interrupt(int irq, void *cosa_) |
1da177e4 LT |
1943 | { |
1944 | unsigned status; | |
1945 | int count = 0; | |
1946 | struct cosa_data *cosa = cosa_; | |
1947 | again: | |
1948 | status = cosa_getstatus(cosa); | |
1949 | #ifdef DEBUG_IRQS | |
9cbe50d4 | 1950 | pr_info("cosa%d: got IRQ, status 0x%02x\n", cosa->num, status & 0xff); |
1da177e4 LT |
1951 | #endif |
1952 | #ifdef DEBUG_IO | |
1953 | debug_status_in(cosa, status); | |
1954 | #endif | |
1955 | switch (status & SR_CMD_FROM_SRP_MASK) { | |
1956 | case SR_DOWN_REQUEST: | |
1957 | tx_interrupt(cosa, status); | |
1958 | break; | |
1959 | case SR_UP_REQUEST: | |
1960 | rx_interrupt(cosa, status); | |
1961 | break; | |
1962 | case SR_END_OF_TRANSFER: | |
1963 | eot_interrupt(cosa, status); | |
1964 | break; | |
1965 | default: | |
1966 | /* We may be too fast for SRP. Try to wait a bit more. */ | |
1967 | if (count++ < 100) { | |
1968 | udelay(100); | |
1969 | goto again; | |
1970 | } | |
9cbe50d4 | 1971 | pr_info("cosa%d: unknown status 0x%02x in IRQ after %d retries\n", |
1da177e4 LT |
1972 | cosa->num, status & 0xff, count); |
1973 | } | |
1974 | #ifdef DEBUG_IRQS | |
1975 | if (count) | |
9cbe50d4 | 1976 | pr_info("%s: %d-times got unknown status in IRQ\n", |
1da177e4 LT |
1977 | cosa->name, count); |
1978 | else | |
9cbe50d4 | 1979 | pr_info("%s: returning from IRQ\n", cosa->name); |
1da177e4 LT |
1980 | #endif |
1981 | return IRQ_HANDLED; | |
1982 | } | |
1983 | ||
1984 | \f | |
1985 | /* ---------- I/O debugging routines ---------- */ | |
1986 | /* | |
1987 | * These routines can be used to monitor COSA/SRP I/O and to printk() | |
1988 | * the data being transferred on the data and status I/O port in a | |
1989 | * readable way. | |
1990 | */ | |
1991 | ||
1992 | #ifdef DEBUG_IO | |
1993 | static void debug_status_in(struct cosa_data *cosa, int status) | |
1994 | { | |
1995 | char *s; | |
640462cb | 1996 | switch (status & SR_CMD_FROM_SRP_MASK) { |
1da177e4 LT |
1997 | case SR_UP_REQUEST: |
1998 | s = "RX_REQ"; | |
1999 | break; | |
2000 | case SR_DOWN_REQUEST: | |
2001 | s = "TX_REQ"; | |
2002 | break; | |
2003 | case SR_END_OF_TRANSFER: | |
2004 | s = "ET_REQ"; | |
2005 | break; | |
2006 | default: | |
2007 | s = "NO_REQ"; | |
2008 | break; | |
2009 | } | |
9cbe50d4 | 2010 | pr_info("%s: IO: status -> 0x%02x (%s%s%s%s)\n", |
1da177e4 LT |
2011 | cosa->name, |
2012 | status, | |
9cbe50d4 JP |
2013 | status & SR_USR_RQ ? "USR_RQ|" : "", |
2014 | status & SR_TX_RDY ? "TX_RDY|" : "", | |
2015 | status & SR_RX_RDY ? "RX_RDY|" : "", | |
1da177e4 LT |
2016 | s); |
2017 | } | |
2018 | ||
2019 | static void debug_status_out(struct cosa_data *cosa, int status) | |
2020 | { | |
9cbe50d4 | 2021 | pr_info("%s: IO: status <- 0x%02x (%s%s%s%s%s%s)\n", |
1da177e4 LT |
2022 | cosa->name, |
2023 | status, | |
9cbe50d4 JP |
2024 | status & SR_RX_DMA_ENA ? "RXDMA|" : "!rxdma|", |
2025 | status & SR_TX_DMA_ENA ? "TXDMA|" : "!txdma|", | |
2026 | status & SR_RST ? "RESET|" : "", | |
2027 | status & SR_USR_INT_ENA ? "USRINT|" : "!usrint|", | |
2028 | status & SR_TX_INT_ENA ? "TXINT|" : "!txint|", | |
2029 | status & SR_RX_INT_ENA ? "RXINT" : "!rxint"); | |
1da177e4 LT |
2030 | } |
2031 | ||
2032 | static void debug_data_in(struct cosa_data *cosa, int data) | |
2033 | { | |
9cbe50d4 | 2034 | pr_info("%s: IO: data -> 0x%04x\n", cosa->name, data); |
1da177e4 LT |
2035 | } |
2036 | ||
2037 | static void debug_data_out(struct cosa_data *cosa, int data) | |
2038 | { | |
9cbe50d4 | 2039 | pr_info("%s: IO: data <- 0x%04x\n", cosa->name, data); |
1da177e4 LT |
2040 | } |
2041 | ||
2042 | static void debug_data_cmd(struct cosa_data *cosa, int data) | |
2043 | { | |
9cbe50d4 | 2044 | pr_info("%s: IO: data <- 0x%04x (%s|%s)\n", |
1da177e4 LT |
2045 | cosa->name, data, |
2046 | data & SR_RDY_RCV ? "RX_RDY" : "!rx_rdy", | |
2047 | data & SR_RDY_SND ? "TX_RDY" : "!tx_rdy"); | |
2048 | } | |
2049 | #endif | |
2050 | ||
2051 | /* EOF -- this file has not been truncated */ |