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Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/upstream-linus
[linux-btrfs-devel.git] / drivers / ide / pdc202xx_new.c
blob9546fe2a93f7f5560175d590af1203e25b8821ea
1 /*
2 * Promise TX2/TX4/TX2000/133 IDE driver
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *
9 * Split from:
10 * linux/drivers/ide/pdc202xx.c Version 0.35 Mar. 30, 2002
11 * Copyright (C) 1998-2002 Andre Hedrick <andre@linux-ide.org>
12 * Copyright (C) 2005-2007 MontaVista Software, Inc.
13 * Portions Copyright (C) 1999 Promise Technology, Inc.
14 * Author: Frank Tiernan (frankt@promise.com)
15 * Released under terms of General Public License
16 */
17
18 #include <linux/module.h>
19 #include <linux/types.h>
20 #include <linux/kernel.h>
21 #include <linux/delay.h>
22 #include <linux/pci.h>
23 #include <linux/init.h>
24 #include <linux/ide.h>
25
26 #include <asm/io.h>
27
28 #ifdef CONFIG_PPC_PMAC
29 #include <asm/prom.h>
30 #include <asm/pci-bridge.h>
31 #endif
32
33 #define DRV_NAME "pdc202xx_new"
34
35 #undef DEBUG
36
37 #ifdef DEBUG
38 #define DBG(fmt, args...) printk("%s: " fmt, __func__, ## args)
39 #else
40 #define DBG(fmt, args...)
41 #endif
42
43 static u8 max_dma_rate(struct pci_dev *pdev)
44 {
45 u8 mode;
46
47 switch(pdev->device) {
48 case PCI_DEVICE_ID_PROMISE_20277:
49 case PCI_DEVICE_ID_PROMISE_20276:
50 case PCI_DEVICE_ID_PROMISE_20275:
51 case PCI_DEVICE_ID_PROMISE_20271:
52 case PCI_DEVICE_ID_PROMISE_20269:
53 mode = 4;
54 break;
55 case PCI_DEVICE_ID_PROMISE_20270:
56 case PCI_DEVICE_ID_PROMISE_20268:
57 mode = 3;
58 break;
59 default:
60 return 0;
61 }
62
63 return mode;
64 }
65
66 /**
67 * get_indexed_reg - Get indexed register
68 * @hwif: for the port address
69 * @index: index of the indexed register
70 */
71 static u8 get_indexed_reg(ide_hwif_t *hwif, u8 index)
72 {
73 u8 value;
74
75 outb(index, hwif->dma_base + 1);
76 value = inb(hwif->dma_base + 3);
77
78 DBG("index[%02X] value[%02X]\n", index, value);
79 return value;
80 }
81
82 /**
83 * set_indexed_reg - Set indexed register
84 * @hwif: for the port address
85 * @index: index of the indexed register
86 */
87 static void set_indexed_reg(ide_hwif_t *hwif, u8 index, u8 value)
88 {
89 outb(index, hwif->dma_base + 1);
90 outb(value, hwif->dma_base + 3);
91 DBG("index[%02X] value[%02X]\n", index, value);
92 }
93
94 /*
95 * ATA Timing Tables based on 133 MHz PLL output clock.
96 *
97 * If the PLL outputs 100 MHz clock, the ASIC hardware will set
98 * the timing registers automatically when "set features" command is
99 * issued to the device. However, if the PLL output clock is 133 MHz,
100 * the following tables must be used.
101 */
102 static struct pio_timing {
103 u8 reg0c, reg0d, reg13;
104 } pio_timings [] = {
105 { 0xfb, 0x2b, 0xac }, /* PIO mode 0, IORDY off, Prefetch off */
106 { 0x46, 0x29, 0xa4 }, /* PIO mode 1, IORDY off, Prefetch off */
107 { 0x23, 0x26, 0x64 }, /* PIO mode 2, IORDY off, Prefetch off */
108 { 0x27, 0x0d, 0x35 }, /* PIO mode 3, IORDY on, Prefetch off */
109 { 0x23, 0x09, 0x25 }, /* PIO mode 4, IORDY on, Prefetch off */
110 };
111
112 static struct mwdma_timing {
113 u8 reg0e, reg0f;
114 } mwdma_timings [] = {
115 { 0xdf, 0x5f }, /* MWDMA mode 0 */
116 { 0x6b, 0x27 }, /* MWDMA mode 1 */
117 { 0x69, 0x25 }, /* MWDMA mode 2 */
118 };
119
120 static struct udma_timing {
121 u8 reg10, reg11, reg12;
122 } udma_timings [] = {
123 { 0x4a, 0x0f, 0xd5 }, /* UDMA mode 0 */
124 { 0x3a, 0x0a, 0xd0 }, /* UDMA mode 1 */
125 { 0x2a, 0x07, 0xcd }, /* UDMA mode 2 */
126 { 0x1a, 0x05, 0xcd }, /* UDMA mode 3 */
127 { 0x1a, 0x03, 0xcd }, /* UDMA mode 4 */
128 { 0x1a, 0x02, 0xcb }, /* UDMA mode 5 */
129 { 0x1a, 0x01, 0xcb }, /* UDMA mode 6 */
130 };
131
132 static void pdcnew_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
133 {
134 struct pci_dev *dev = to_pci_dev(hwif->dev);
135 u8 adj = (drive->dn & 1) ? 0x08 : 0x00;
136 const u8 speed = drive->dma_mode;
137
138 /*
139 * IDE core issues SETFEATURES_XFER to the drive first (thanks to
140 * IDE_HFLAG_POST_SET_MODE in ->host_flags). PDC202xx hardware will
141 * automatically set the timing registers based on 100 MHz PLL output.
142 *
143 * As we set up the PLL to output 133 MHz for UltraDMA/133 capable
144 * chips, we must override the default register settings...
145 */
146 if (max_dma_rate(dev) == 4) {
147 u8 mode = speed & 0x07;
148
149 if (speed >= XFER_UDMA_0) {
150 set_indexed_reg(hwif, 0x10 + adj,
151 udma_timings[mode].reg10);
152 set_indexed_reg(hwif, 0x11 + adj,
153 udma_timings[mode].reg11);
154 set_indexed_reg(hwif, 0x12 + adj,
155 udma_timings[mode].reg12);
156 } else {
157 set_indexed_reg(hwif, 0x0e + adj,
158 mwdma_timings[mode].reg0e);
159 set_indexed_reg(hwif, 0x0f + adj,
160 mwdma_timings[mode].reg0f);
161 }
162 } else if (speed == XFER_UDMA_2) {
163 /* Set tHOLD bit to 0 if using UDMA mode 2 */
164 u8 tmp = get_indexed_reg(hwif, 0x10 + adj);
165
166 set_indexed_reg(hwif, 0x10 + adj, tmp & 0x7f);
167 }
168 }
169
170 static void pdcnew_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
171 {
172 struct pci_dev *dev = to_pci_dev(hwif->dev);
173 u8 adj = (drive->dn & 1) ? 0x08 : 0x00;
174 const u8 pio = drive->pio_mode - XFER_PIO_0;
175
176 if (max_dma_rate(dev) == 4) {
177 set_indexed_reg(hwif, 0x0c + adj, pio_timings[pio].reg0c);
178 set_indexed_reg(hwif, 0x0d + adj, pio_timings[pio].reg0d);
179 set_indexed_reg(hwif, 0x13 + adj, pio_timings[pio].reg13);
180 }
181 }
182
183 static u8 pdcnew_cable_detect(ide_hwif_t *hwif)
184 {
185 if (get_indexed_reg(hwif, 0x0b) & 0x04)
186 return ATA_CBL_PATA40;
187 else
188 return ATA_CBL_PATA80;
189 }
190
191 static void pdcnew_reset(ide_drive_t *drive)
192 {
193 /*
194 * Deleted this because it is redundant from the caller.
195 */
196 printk(KERN_WARNING "pdc202xx_new: %s channel reset.\n",
197 drive->hwif->channel ? "Secondary" : "Primary");
198 }
199
200 /**
201 * read_counter - Read the byte count registers
202 * @dma_base: for the port address
203 */
204 static long read_counter(u32 dma_base)
205 {
206 u32 pri_dma_base = dma_base, sec_dma_base = dma_base + 0x08;
207 u8 cnt0, cnt1, cnt2, cnt3;
208 long count = 0, last;
209 int retry = 3;
210
211 do {
212 last = count;
213
214 /* Read the current count */
215 outb(0x20, pri_dma_base + 0x01);
216 cnt0 = inb(pri_dma_base + 0x03);
217 outb(0x21, pri_dma_base + 0x01);
218 cnt1 = inb(pri_dma_base + 0x03);
219 outb(0x20, sec_dma_base + 0x01);
220 cnt2 = inb(sec_dma_base + 0x03);
221 outb(0x21, sec_dma_base + 0x01);
222 cnt3 = inb(sec_dma_base + 0x03);
223
224 count = (cnt3 << 23) | (cnt2 << 15) | (cnt1 << 8) | cnt0;
225
226 /*
227 * The 30-bit decrementing counter is read in 4 pieces.
228 * Incorrect value may be read when the most significant bytes
229 * are changing...
230 */
231 } while (retry-- && (((last ^ count) & 0x3fff8000) || last < count));
232
233 DBG("cnt0[%02X] cnt1[%02X] cnt2[%02X] cnt3[%02X]\n",
234 cnt0, cnt1, cnt2, cnt3);
235
236 return count;
237 }
238
239 /**
240 * detect_pll_input_clock - Detect the PLL input clock in Hz.
241 * @dma_base: for the port address
242 * E.g. 16949000 on 33 MHz PCI bus, i.e. half of the PCI clock.
243 */
244 static long detect_pll_input_clock(unsigned long dma_base)
245 {
246 struct timeval start_time, end_time;
247 long start_count, end_count;
248 long pll_input, usec_elapsed;
249 u8 scr1;
250
251 start_count = read_counter(dma_base);
252 do_gettimeofday(&start_time);
253
254 /* Start the test mode */
255 outb(0x01, dma_base + 0x01);
256 scr1 = inb(dma_base + 0x03);
257 DBG("scr1[%02X]\n", scr1);
258 outb(scr1 | 0x40, dma_base + 0x03);
259
260 /* Let the counter run for 10 ms. */
261 mdelay(10);
262
263 end_count = read_counter(dma_base);
264 do_gettimeofday(&end_time);
265
266 /* Stop the test mode */
267 outb(0x01, dma_base + 0x01);
268 scr1 = inb(dma_base + 0x03);
269 DBG("scr1[%02X]\n", scr1);
270 outb(scr1 & ~0x40, dma_base + 0x03);
271
272 /*
273 * Calculate the input clock in Hz
274 * (the clock counter is 30 bit wide and counts down)
275 */
276 usec_elapsed = (end_time.tv_sec - start_time.tv_sec) * 1000000 +
277 (end_time.tv_usec - start_time.tv_usec);
278 pll_input = ((start_count - end_count) & 0x3fffffff) / 10 *
279 (10000000 / usec_elapsed);
280
281 DBG("start[%ld] end[%ld]\n", start_count, end_count);
282
283 return pll_input;
284 }
285
286 #ifdef CONFIG_PPC_PMAC
287 static void apple_kiwi_init(struct pci_dev *pdev)
288 {
289 struct device_node *np = pci_device_to_OF_node(pdev);
290 u8 conf;
291
292 if (np == NULL || !of_device_is_compatible(np, "kiwi-root"))
293 return;
294
295 if (pdev->revision >= 0x03) {
296 /* Setup chip magic config stuff (from darwin) */
297 pci_read_config_byte (pdev, 0x40, &conf);
298 pci_write_config_byte(pdev, 0x40, (conf | 0x01));
299 }
300 }
301 #endif /* CONFIG_PPC_PMAC */
302
303 static int init_chipset_pdcnew(struct pci_dev *dev)
304 {
305 const char *name = DRV_NAME;
306 unsigned long dma_base = pci_resource_start(dev, 4);
307 unsigned long sec_dma_base = dma_base + 0x08;
308 long pll_input, pll_output, ratio;
309 int f, r;
310 u8 pll_ctl0, pll_ctl1;
311
312 if (dma_base == 0)
313 return -EFAULT;
314
315 #ifdef CONFIG_PPC_PMAC
316 apple_kiwi_init(dev);
317 #endif
318
319 /* Calculate the required PLL output frequency */
320 switch(max_dma_rate(dev)) {
321 case 4: /* it's 133 MHz for Ultra133 chips */
322 pll_output = 133333333;
323 break;
324 case 3: /* and 100 MHz for Ultra100 chips */
325 default:
326 pll_output = 100000000;
327 break;
328 }
329
330 /*
331 * Detect PLL input clock.
332 * On some systems, where PCI bus is running at non-standard clock rate
333 * (e.g. 25 or 40 MHz), we have to adjust the cycle time.
334 * PDC20268 and newer chips employ PLL circuit to help correct timing
335 * registers setting.
336 */
337 pll_input = detect_pll_input_clock(dma_base);
338 printk(KERN_INFO "%s %s: PLL input clock is %ld kHz\n",
339 name, pci_name(dev), pll_input / 1000);
340
341 /* Sanity check */
342 if (unlikely(pll_input < 5000000L || pll_input > 70000000L)) {
343 printk(KERN_ERR "%s %s: Bad PLL input clock %ld Hz, giving up!"
344 "\n", name, pci_name(dev), pll_input);
345 goto out;
346 }
347
348 #ifdef DEBUG
349 DBG("pll_output is %ld Hz\n", pll_output);
350
351 /* Show the current clock value of PLL control register
352 * (maybe already configured by the BIOS)
353 */
354 outb(0x02, sec_dma_base + 0x01);
355 pll_ctl0 = inb(sec_dma_base + 0x03);
356 outb(0x03, sec_dma_base + 0x01);
357 pll_ctl1 = inb(sec_dma_base + 0x03);
358
359 DBG("pll_ctl[%02X][%02X]\n", pll_ctl0, pll_ctl1);
360 #endif
361
362 /*
363 * Calculate the ratio of F, R and NO
364 * POUT = (F + 2) / (( R + 2) * NO)
365 */
366 ratio = pll_output / (pll_input / 1000);
367 if (ratio < 8600L) { /* 8.6x */
368 /* Using NO = 0x01, R = 0x0d */
369 r = 0x0d;
370 } else if (ratio < 12900L) { /* 12.9x */
371 /* Using NO = 0x01, R = 0x08 */
372 r = 0x08;
373 } else if (ratio < 16100L) { /* 16.1x */
374 /* Using NO = 0x01, R = 0x06 */
375 r = 0x06;
376 } else if (ratio < 64000L) { /* 64x */
377 r = 0x00;
378 } else {
379 /* Invalid ratio */
380 printk(KERN_ERR "%s %s: Bad ratio %ld, giving up!\n",
381 name, pci_name(dev), ratio);
382 goto out;
383 }
384
385 f = (ratio * (r + 2)) / 1000 - 2;
386
387 DBG("F[%d] R[%d] ratio*1000[%ld]\n", f, r, ratio);
388
389 if (unlikely(f < 0 || f > 127)) {
390 /* Invalid F */
391 printk(KERN_ERR "%s %s: F[%d] invalid!\n",
392 name, pci_name(dev), f);
393 goto out;
394 }
395
396 pll_ctl0 = (u8) f;
397 pll_ctl1 = (u8) r;
398
399 DBG("Writing pll_ctl[%02X][%02X]\n", pll_ctl0, pll_ctl1);
400
401 outb(0x02, sec_dma_base + 0x01);
402 outb(pll_ctl0, sec_dma_base + 0x03);
403 outb(0x03, sec_dma_base + 0x01);
404 outb(pll_ctl1, sec_dma_base + 0x03);
405
406 /* Wait the PLL circuit to be stable */
407 mdelay(30);
408
409 #ifdef DEBUG
410 /*
411 * Show the current clock value of PLL control register
412 */
413 outb(0x02, sec_dma_base + 0x01);
414 pll_ctl0 = inb(sec_dma_base + 0x03);
415 outb(0x03, sec_dma_base + 0x01);
416 pll_ctl1 = inb(sec_dma_base + 0x03);
417
418 DBG("pll_ctl[%02X][%02X]\n", pll_ctl0, pll_ctl1);
419 #endif
420
421 out:
422 return 0;
423 }
424
425 static struct pci_dev * __devinit pdc20270_get_dev2(struct pci_dev *dev)
426 {
427 struct pci_dev *dev2;
428
429 dev2 = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn) + 1,
430 PCI_FUNC(dev->devfn)));
431
432 if (dev2 &&
433 dev2->vendor == dev->vendor &&
434 dev2->device == dev->device) {
435
436 if (dev2->irq != dev->irq) {
437 dev2->irq = dev->irq;
438 printk(KERN_INFO DRV_NAME " %s: PCI config space "
439 "interrupt fixed\n", pci_name(dev));
440 }
441
442 return dev2;
443 }
444
445 return NULL;
446 }
447
448 static const struct ide_port_ops pdcnew_port_ops = {
449 .set_pio_mode = pdcnew_set_pio_mode,
450 .set_dma_mode = pdcnew_set_dma_mode,
451 .resetproc = pdcnew_reset,
452 .cable_detect = pdcnew_cable_detect,
453 };
454
455 #define DECLARE_PDCNEW_DEV(udma) \
456 { \
457 .name = DRV_NAME, \
458 .init_chipset = init_chipset_pdcnew, \
459 .port_ops = &pdcnew_port_ops, \
460 .host_flags = IDE_HFLAG_POST_SET_MODE | \
461 IDE_HFLAG_ERROR_STOPS_FIFO | \
462 IDE_HFLAG_OFF_BOARD, \
463 .pio_mask = ATA_PIO4, \
464 .mwdma_mask = ATA_MWDMA2, \
465 .udma_mask = udma, \
466 }
467
468 static const struct ide_port_info pdcnew_chipsets[] __devinitdata = {
469 /* 0: PDC202{68,70} */ DECLARE_PDCNEW_DEV(ATA_UDMA5),
470 /* 1: PDC202{69,71,75,76,77} */ DECLARE_PDCNEW_DEV(ATA_UDMA6),
471 };
472
473 /**
474 * pdc202new_init_one - called when a pdc202xx is found
475 * @dev: the pdc202new device
476 * @id: the matching pci id
477 *
478 * Called when the PCI registration layer (or the IDE initialization)
479 * finds a device matching our IDE device tables.
480 */
481
482 static int __devinit pdc202new_init_one(struct pci_dev *dev, const struct pci_device_id *id)
483 {
484 const struct ide_port_info *d = &pdcnew_chipsets[id->driver_data];
485 struct pci_dev *bridge = dev->bus->self;
486
487 if (dev->device == PCI_DEVICE_ID_PROMISE_20270 && bridge &&
488 bridge->vendor == PCI_VENDOR_ID_DEC &&
489 bridge->device == PCI_DEVICE_ID_DEC_21150) {
490 struct pci_dev *dev2;
491
492 if (PCI_SLOT(dev->devfn) & 2)
493 return -ENODEV;
494
495 dev2 = pdc20270_get_dev2(dev);
496
497 if (dev2) {
498 int ret = ide_pci_init_two(dev, dev2, d, NULL);
499 if (ret < 0)
500 pci_dev_put(dev2);
501 return ret;
502 }
503 }
504
505 if (dev->device == PCI_DEVICE_ID_PROMISE_20276 && bridge &&
506 bridge->vendor == PCI_VENDOR_ID_INTEL &&
507 (bridge->device == PCI_DEVICE_ID_INTEL_I960 ||
508 bridge->device == PCI_DEVICE_ID_INTEL_I960RM)) {
509 printk(KERN_INFO DRV_NAME " %s: attached to I2O RAID controller,"
510 " skipping\n", pci_name(dev));
511 return -ENODEV;
512 }
513
514 return ide_pci_init_one(dev, d, NULL);
515 }
516
517 static void __devexit pdc202new_remove(struct pci_dev *dev)
518 {
519 struct ide_host *host = pci_get_drvdata(dev);
520 struct pci_dev *dev2 = host->dev[1] ? to_pci_dev(host->dev[1]) : NULL;
521
522 ide_pci_remove(dev);
523 pci_dev_put(dev2);
524 }
525
526 static const struct pci_device_id pdc202new_pci_tbl[] = {
527 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20268), 0 },
528 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20269), 1 },
529 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20270), 0 },
530 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20271), 1 },
531 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20275), 1 },
532 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20276), 1 },
533 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20277), 1 },
534 { 0, },
535 };
536 MODULE_DEVICE_TABLE(pci, pdc202new_pci_tbl);
537
538 static struct pci_driver pdc202new_pci_driver = {
539 .name = "Promise_IDE",
540 .id_table = pdc202new_pci_tbl,
541 .probe = pdc202new_init_one,
542 .remove = __devexit_p(pdc202new_remove),
543 .suspend = ide_pci_suspend,
544 .resume = ide_pci_resume,
545 };
546
547 static int __init pdc202new_ide_init(void)
548 {
549 return ide_pci_register_driver(&pdc202new_pci_driver);
550 }
551
552 static void __exit pdc202new_ide_exit(void)
553 {
554 pci_unregister_driver(&pdc202new_pci_driver);
555 }
556
557 module_init(pdc202new_ide_init);
558 module_exit(pdc202new_ide_exit);
559
560 MODULE_AUTHOR("Andre Hedrick, Frank Tiernan");
561 MODULE_DESCRIPTION("PCI driver module for Promise PDC20268 and higher");
562 MODULE_LICENSE("GPL");
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