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RT-AC66 3.0.0.4.374.130 core
[tomato.git] / release / src-rt-6.x / linux / linux-2.6 / drivers / net / tokenring / abyss.c
blob1bdd3beefbe54cf17121d1296e5d18dbfed3ac04
1 /*
2 * abyss.c: Network driver for the Madge Smart 16/4 PCI Mk2 token ring card.
3 *
4 * Written 1999-2000 by Adam Fritzler
5 *
6 * This software may be used and distributed according to the terms
7 * of the GNU General Public License, incorporated herein by reference.
8 *
9 * This driver module supports the following cards:
10 * - Madge Smart 16/4 PCI Mk2
11 *
12 * Maintainer(s):
13 * AF Adam Fritzler mid@auk.cx
14 *
15 * Modification History:
16 * 30-Dec-99 AF Split off from the tms380tr driver.
17 * 22-Jan-00 AF Updated to use indirect read/writes
18 * 23-Nov-00 JG New PCI API, cleanups
19 *
20 *
21 * TODO:
22 * 1. See if we can use MMIO instead of inb/outb/inw/outw
23 * 2. Add support for Mk1 (has AT24 attached to the PCI
24 * config registers)
25 *
26 */
27
28 #include <linux/module.h>
29 #include <linux/kernel.h>
30 #include <linux/errno.h>
31 #include <linux/pci.h>
32 #include <linux/init.h>
33 #include <linux/netdevice.h>
34 #include <linux/trdevice.h>
35
36 #include <asm/system.h>
37 #include <asm/io.h>
38 #include <asm/irq.h>
39
40 #include "tms380tr.h"
41 #include "abyss.h" /* Madge-specific constants */
42
43 static char version[] __devinitdata =
44 "abyss.c: v1.02 23/11/2000 by Adam Fritzler\n";
45
46 #define ABYSS_IO_EXTENT 64
47
48 static struct pci_device_id abyss_pci_tbl[] = {
49 { PCI_VENDOR_ID_MADGE, PCI_DEVICE_ID_MADGE_MK2,
50 PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_TOKEN_RING << 8, 0x00ffffff, },
51 { } /* Terminating entry */
52 };
53 MODULE_DEVICE_TABLE(pci, abyss_pci_tbl);
54
55 MODULE_LICENSE("GPL");
56
57 static int abyss_open(struct net_device *dev);
58 static int abyss_close(struct net_device *dev);
59 static void abyss_enable(struct net_device *dev);
60 static int abyss_chipset_init(struct net_device *dev);
61 static void abyss_read_eeprom(struct net_device *dev);
62 static unsigned short abyss_setnselout_pins(struct net_device *dev);
63
64 static void at24_writedatabyte(unsigned long regaddr, unsigned char byte);
65 static int at24_sendfullcmd(unsigned long regaddr, unsigned char cmd, unsigned char addr);
66 static int at24_sendcmd(unsigned long regaddr, unsigned char cmd);
67 static unsigned char at24_readdatabit(unsigned long regaddr);
68 static unsigned char at24_readdatabyte(unsigned long regaddr);
69 static int at24_waitforack(unsigned long regaddr);
70 static int at24_waitfornack(unsigned long regaddr);
71 static void at24_setlines(unsigned long regaddr, unsigned char clock, unsigned char data);
72 static void at24_start(unsigned long regaddr);
73 static unsigned char at24_readb(unsigned long regaddr, unsigned char addr);
74
75 static unsigned short abyss_sifreadb(struct net_device *dev, unsigned short reg)
76 {
77 return inb(dev->base_addr + reg);
78 }
79
80 static unsigned short abyss_sifreadw(struct net_device *dev, unsigned short reg)
81 {
82 return inw(dev->base_addr + reg);
83 }
84
85 static void abyss_sifwriteb(struct net_device *dev, unsigned short val, unsigned short reg)
86 {
87 outb(val, dev->base_addr + reg);
88 }
89
90 static void abyss_sifwritew(struct net_device *dev, unsigned short val, unsigned short reg)
91 {
92 outw(val, dev->base_addr + reg);
93 }
94
95 static int __devinit abyss_attach(struct pci_dev *pdev, const struct pci_device_id *ent)
96 {
97 static int versionprinted;
98 struct net_device *dev;
99 struct net_local *tp;
100 int i, ret, pci_irq_line;
101 unsigned long pci_ioaddr;
102
103 if (versionprinted++ == 0)
104 printk("%s", version);
105
106 if (pci_enable_device(pdev))
107 return -EIO;
108
109 /* Remove I/O space marker in bit 0. */
110 pci_irq_line = pdev->irq;
111 pci_ioaddr = pci_resource_start (pdev, 0);
112
113 /* At this point we have found a valid card. */
114
115 dev = alloc_trdev(sizeof(struct net_local));
116 if (!dev)
117 return -ENOMEM;
118
119 SET_MODULE_OWNER(dev);
120
121 if (!request_region(pci_ioaddr, ABYSS_IO_EXTENT, dev->name)) {
122 ret = -EBUSY;
123 goto err_out_trdev;
124 }
125
126 ret = request_irq(pdev->irq, tms380tr_interrupt, IRQF_SHARED,
127 dev->name, dev);
128 if (ret)
129 goto err_out_region;
130
131 dev->base_addr = pci_ioaddr;
132 dev->irq = pci_irq_line;
133
134 printk("%s: Madge Smart 16/4 PCI Mk2 (Abyss)\n", dev->name);
135 printk("%s: IO: %#4lx IRQ: %d\n",
136 dev->name, pci_ioaddr, dev->irq);
137 /*
138 * The TMS SIF registers lay 0x10 above the card base address.
139 */
140 dev->base_addr += 0x10;
141
142 ret = tmsdev_init(dev, &pdev->dev);
143 if (ret) {
144 printk("%s: unable to get memory for dev->priv.\n",
145 dev->name);
146 goto err_out_irq;
147 }
148
149 abyss_read_eeprom(dev);
150
151 printk("%s: Ring Station Address: ", dev->name);
152 printk("%2.2x", dev->dev_addr[0]);
153 for (i = 1; i < 6; i++)
154 printk(":%2.2x", dev->dev_addr[i]);
155 printk("\n");
156
157 tp = netdev_priv(dev);
158 tp->setnselout = abyss_setnselout_pins;
159 tp->sifreadb = abyss_sifreadb;
160 tp->sifreadw = abyss_sifreadw;
161 tp->sifwriteb = abyss_sifwriteb;
162 tp->sifwritew = abyss_sifwritew;
163
164 memcpy(tp->ProductID, "Madge PCI 16/4 Mk2", PROD_ID_SIZE + 1);
165
166 dev->open = abyss_open;
167 dev->stop = abyss_close;
168
169 pci_set_drvdata(pdev, dev);
170 SET_NETDEV_DEV(dev, &pdev->dev);
171
172 ret = register_netdev(dev);
173 if (ret)
174 goto err_out_tmsdev;
175 return 0;
176
177 err_out_tmsdev:
178 pci_set_drvdata(pdev, NULL);
179 tmsdev_term(dev);
180 err_out_irq:
181 free_irq(pdev->irq, dev);
182 err_out_region:
183 release_region(pci_ioaddr, ABYSS_IO_EXTENT);
184 err_out_trdev:
185 free_netdev(dev);
186 return ret;
187 }
188
189 static unsigned short abyss_setnselout_pins(struct net_device *dev)
190 {
191 unsigned short val = 0;
192 struct net_local *tp = netdev_priv(dev);
193
194 if(tp->DataRate == SPEED_4)
195 val |= 0x01; /* Set 4Mbps */
196 else
197 val |= 0x00; /* Set 16Mbps */
198
199 return val;
200 }
201
202 /*
203 * The following Madge boards should use this code:
204 * - Smart 16/4 PCI Mk2 (Abyss)
205 * - Smart 16/4 PCI Mk1 (PCI T)
206 * - Smart 16/4 Client Plus PnP (Big Apple)
207 * - Smart 16/4 Cardbus Mk2
208 *
209 * These access an Atmel AT24 SEEPROM using their glue chip registers.
210 *
211 */
212 static void at24_writedatabyte(unsigned long regaddr, unsigned char byte)
213 {
214 int i;
215
216 for (i = 0; i < 8; i++) {
217 at24_setlines(regaddr, 0, (byte >> (7-i))&0x01);
218 at24_setlines(regaddr, 1, (byte >> (7-i))&0x01);
219 at24_setlines(regaddr, 0, (byte >> (7-i))&0x01);
220 }
221 }
222
223 static int at24_sendfullcmd(unsigned long regaddr, unsigned char cmd, unsigned char addr)
224 {
225 if (at24_sendcmd(regaddr, cmd)) {
226 at24_writedatabyte(regaddr, addr);
227 return at24_waitforack(regaddr);
228 }
229 return 0;
230 }
231
232 static int at24_sendcmd(unsigned long regaddr, unsigned char cmd)
233 {
234 int i;
235
236 for (i = 0; i < 10; i++) {
237 at24_start(regaddr);
238 at24_writedatabyte(regaddr, cmd);
239 if (at24_waitforack(regaddr))
240 return 1;
241 }
242 return 0;
243 }
244
245 static unsigned char at24_readdatabit(unsigned long regaddr)
246 {
247 unsigned char val;
248
249 at24_setlines(regaddr, 0, 1);
250 at24_setlines(regaddr, 1, 1);
251 val = (inb(regaddr) & AT24_DATA)?1:0;
252 at24_setlines(regaddr, 1, 1);
253 at24_setlines(regaddr, 0, 1);
254 return val;
255 }
256
257 static unsigned char at24_readdatabyte(unsigned long regaddr)
258 {
259 unsigned char data = 0;
260 int i;
261
262 for (i = 0; i < 8; i++) {
263 data <<= 1;
264 data |= at24_readdatabit(regaddr);
265 }
266
267 return data;
268 }
269
270 static int at24_waitforack(unsigned long regaddr)
271 {
272 int i;
273
274 for (i = 0; i < 10; i++) {
275 if ((at24_readdatabit(regaddr) & 0x01) == 0x00)
276 return 1;
277 }
278 return 0;
279 }
280
281 static int at24_waitfornack(unsigned long regaddr)
282 {
283 int i;
284 for (i = 0; i < 10; i++) {
285 if ((at24_readdatabit(regaddr) & 0x01) == 0x01)
286 return 1;
287 }
288 return 0;
289 }
290
291 static void at24_setlines(unsigned long regaddr, unsigned char clock, unsigned char data)
292 {
293 unsigned char val = AT24_ENABLE;
294 if (clock)
295 val |= AT24_CLOCK;
296 if (data)
297 val |= AT24_DATA;
298
299 outb(val, regaddr);
300 tms380tr_wait(20); /* Very necessary. */
301 }
302
303 static void at24_start(unsigned long regaddr)
304 {
305 at24_setlines(regaddr, 0, 1);
306 at24_setlines(regaddr, 1, 1);
307 at24_setlines(regaddr, 1, 0);
308 at24_setlines(regaddr, 0, 1);
309 }
310
311 static unsigned char at24_readb(unsigned long regaddr, unsigned char addr)
312 {
313 unsigned char data = 0xff;
314
315 if (at24_sendfullcmd(regaddr, AT24_WRITE, addr)) {
316 if (at24_sendcmd(regaddr, AT24_READ)) {
317 data = at24_readdatabyte(regaddr);
318 if (!at24_waitfornack(regaddr))
319 data = 0xff;
320 }
321 }
322 return data;
323 }
324
325
326 /*
327 * Enable basic functions of the Madge chipset needed
328 * for initialization.
329 */
330 static void abyss_enable(struct net_device *dev)
331 {
332 unsigned char reset_reg;
333 unsigned long ioaddr;
334
335 ioaddr = dev->base_addr;
336 reset_reg = inb(ioaddr + PCIBM2_RESET_REG);
337 reset_reg |= PCIBM2_RESET_REG_CHIP_NRES;
338 outb(reset_reg, ioaddr + PCIBM2_RESET_REG);
339 tms380tr_wait(100);
340 }
341
342 /*
343 * Enable the functions of the Madge chipset needed for
344 * full working order.
345 */
346 static int abyss_chipset_init(struct net_device *dev)
347 {
348 unsigned char reset_reg;
349 unsigned long ioaddr;
350
351 ioaddr = dev->base_addr;
352
353 reset_reg = inb(ioaddr + PCIBM2_RESET_REG);
354
355 reset_reg |= PCIBM2_RESET_REG_CHIP_NRES;
356 outb(reset_reg, ioaddr + PCIBM2_RESET_REG);
357
358 reset_reg &= ~(PCIBM2_RESET_REG_CHIP_NRES |
359 PCIBM2_RESET_REG_FIFO_NRES |
360 PCIBM2_RESET_REG_SIF_NRES);
361 outb(reset_reg, ioaddr + PCIBM2_RESET_REG);
362
363 tms380tr_wait(100);
364
365 reset_reg |= PCIBM2_RESET_REG_CHIP_NRES;
366 outb(reset_reg, ioaddr + PCIBM2_RESET_REG);
367
368 reset_reg |= PCIBM2_RESET_REG_SIF_NRES;
369 outb(reset_reg, ioaddr + PCIBM2_RESET_REG);
370
371 reset_reg |= PCIBM2_RESET_REG_FIFO_NRES;
372 outb(reset_reg, ioaddr + PCIBM2_RESET_REG);
373
374 outb(PCIBM2_INT_CONTROL_REG_SINTEN |
375 PCIBM2_INT_CONTROL_REG_PCI_ERR_ENABLE,
376 ioaddr + PCIBM2_INT_CONTROL_REG);
377
378 outb(30, ioaddr + PCIBM2_FIFO_THRESHOLD);
379
380 return 0;
381 }
382
383 static inline void abyss_chipset_close(struct net_device *dev)
384 {
385 unsigned long ioaddr;
386
387 ioaddr = dev->base_addr;
388 outb(0, ioaddr + PCIBM2_RESET_REG);
389 }
390
391 /*
392 * Read configuration data from the AT24 SEEPROM on Madge cards.
393 *
394 */
395 static void abyss_read_eeprom(struct net_device *dev)
396 {
397 struct net_local *tp;
398 unsigned long ioaddr;
399 unsigned short val;
400 int i;
401
402 tp = netdev_priv(dev);
403 ioaddr = dev->base_addr;
404
405 /* Must enable glue chip first */
406 abyss_enable(dev);
407
408 val = at24_readb(ioaddr + PCIBM2_SEEPROM_REG,
409 PCIBM2_SEEPROM_RING_SPEED);
410 tp->DataRate = val?SPEED_4:SPEED_16; /* set open speed */
411 printk("%s: SEEPROM: ring speed: %dMb/sec\n", dev->name, tp->DataRate);
412
413 val = at24_readb(ioaddr + PCIBM2_SEEPROM_REG,
414 PCIBM2_SEEPROM_RAM_SIZE) * 128;
415 printk("%s: SEEPROM: adapter RAM: %dkb\n", dev->name, val);
416
417 dev->addr_len = 6;
418 for (i = 0; i < 6; i++)
419 dev->dev_addr[i] = at24_readb(ioaddr + PCIBM2_SEEPROM_REG,
420 PCIBM2_SEEPROM_BIA+i);
421 }
422
423 static int abyss_open(struct net_device *dev)
424 {
425 abyss_chipset_init(dev);
426 tms380tr_open(dev);
427 return 0;
428 }
429
430 static int abyss_close(struct net_device *dev)
431 {
432 tms380tr_close(dev);
433 abyss_chipset_close(dev);
434 return 0;
435 }
436
437 static void __devexit abyss_detach (struct pci_dev *pdev)
438 {
439 struct net_device *dev = pci_get_drvdata(pdev);
440
441 BUG_ON(!dev);
442 unregister_netdev(dev);
443 release_region(dev->base_addr-0x10, ABYSS_IO_EXTENT);
444 free_irq(dev->irq, dev);
445 tmsdev_term(dev);
446 free_netdev(dev);
447 pci_set_drvdata(pdev, NULL);
448 }
449
450 static struct pci_driver abyss_driver = {
451 .name = "abyss",
452 .id_table = abyss_pci_tbl,
453 .probe = abyss_attach,
454 .remove = __devexit_p(abyss_detach),
455 };
456
457 static int __init abyss_init (void)
458 {
459 return pci_register_driver(&abyss_driver);
460 }
461
462 static void __exit abyss_rmmod (void)
463 {
464 pci_unregister_driver (&abyss_driver);
465 }
466
467 module_init(abyss_init);
468 module_exit(abyss_rmmod);
469
Tomato firmware and modifications.