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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Promise TX2/TX4/TX2000/133 IDE driver
4 *
5 * Split from:
6 * linux/drivers/ide/pdc202xx.c Version 0.35 Mar. 30, 2002
7 * Copyright (C) 1998-2002 Andre Hedrick <andre@linux-ide.org>
8 * Copyright (C) 2005-2007 MontaVista Software, Inc.
9 * Portions Copyright (C) 1999 Promise Technology, Inc.
10 * Author: Frank Tiernan (frankt@promise.com)
11 * Released under terms of General Public License
12 */
13
14#include <linux/module.h>
15#include <linux/types.h>
16#include <linux/kernel.h>
17#include <linux/delay.h>
18#include <linux/pci.h>
19#include <linux/init.h>
20#include <linux/ide.h>
21#include <linux/ktime.h>
22
23#include <asm/io.h>
24
25#ifdef CONFIG_PPC_PMAC
26#include <asm/prom.h>
27#endif
28
29#define DRV_NAME "pdc202xx_new"
30
31#undef DEBUG
32
33#ifdef DEBUG
34#define DBG(fmt, args...) printk("%s: " fmt, __func__, ## args)
35#else
36#define DBG(fmt, args...)
37#endif
38
39static u8 max_dma_rate(struct pci_dev *pdev)
40{
41 u8 mode;
42
43 switch(pdev->device) {
44 case PCI_DEVICE_ID_PROMISE_20277:
45 case PCI_DEVICE_ID_PROMISE_20276:
46 case PCI_DEVICE_ID_PROMISE_20275:
47 case PCI_DEVICE_ID_PROMISE_20271:
48 case PCI_DEVICE_ID_PROMISE_20269:
49 mode = 4;
50 break;
51 case PCI_DEVICE_ID_PROMISE_20270:
52 case PCI_DEVICE_ID_PROMISE_20268:
53 mode = 3;
54 break;
55 default:
56 return 0;
57 }
58
59 return mode;
60}
61
62/**
63 * get_indexed_reg - Get indexed register
64 * @hwif: for the port address
65 * @index: index of the indexed register
66 */
67static u8 get_indexed_reg(ide_hwif_t *hwif, u8 index)
68{
69 u8 value;
70
71 outb(index, hwif->dma_base + 1);
72 value = inb(hwif->dma_base + 3);
73
74 DBG("index[%02X] value[%02X]\n", index, value);
75 return value;
76}
77
78/**
79 * set_indexed_reg - Set indexed register
80 * @hwif: for the port address
81 * @index: index of the indexed register
82 */
83static void set_indexed_reg(ide_hwif_t *hwif, u8 index, u8 value)
84{
85 outb(index, hwif->dma_base + 1);
86 outb(value, hwif->dma_base + 3);
87 DBG("index[%02X] value[%02X]\n", index, value);
88}
89
90/*
91 * ATA Timing Tables based on 133 MHz PLL output clock.
92 *
93 * If the PLL outputs 100 MHz clock, the ASIC hardware will set
94 * the timing registers automatically when "set features" command is
95 * issued to the device. However, if the PLL output clock is 133 MHz,
96 * the following tables must be used.
97 */
98static struct pio_timing {
99 u8 reg0c, reg0d, reg13;
100} pio_timings [] = {
101 { 0xfb, 0x2b, 0xac }, /* PIO mode 0, IORDY off, Prefetch off */
102 { 0x46, 0x29, 0xa4 }, /* PIO mode 1, IORDY off, Prefetch off */
103 { 0x23, 0x26, 0x64 }, /* PIO mode 2, IORDY off, Prefetch off */
104 { 0x27, 0x0d, 0x35 }, /* PIO mode 3, IORDY on, Prefetch off */
105 { 0x23, 0x09, 0x25 }, /* PIO mode 4, IORDY on, Prefetch off */
106};
107
108static struct mwdma_timing {
109 u8 reg0e, reg0f;
110} mwdma_timings [] = {
111 { 0xdf, 0x5f }, /* MWDMA mode 0 */
112 { 0x6b, 0x27 }, /* MWDMA mode 1 */
113 { 0x69, 0x25 }, /* MWDMA mode 2 */
114};
115
116static struct udma_timing {
117 u8 reg10, reg11, reg12;
118} udma_timings [] = {
119 { 0x4a, 0x0f, 0xd5 }, /* UDMA mode 0 */
120 { 0x3a, 0x0a, 0xd0 }, /* UDMA mode 1 */
121 { 0x2a, 0x07, 0xcd }, /* UDMA mode 2 */
122 { 0x1a, 0x05, 0xcd }, /* UDMA mode 3 */
123 { 0x1a, 0x03, 0xcd }, /* UDMA mode 4 */
124 { 0x1a, 0x02, 0xcb }, /* UDMA mode 5 */
125 { 0x1a, 0x01, 0xcb }, /* UDMA mode 6 */
126};
127
128static void pdcnew_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
129{
130 struct pci_dev *dev = to_pci_dev(hwif->dev);
131 u8 adj = (drive->dn & 1) ? 0x08 : 0x00;
132 const u8 speed = drive->dma_mode;
133
134 /*
135 * IDE core issues SETFEATURES_XFER to the drive first (thanks to
136 * IDE_HFLAG_POST_SET_MODE in ->host_flags). PDC202xx hardware will
137 * automatically set the timing registers based on 100 MHz PLL output.
138 *
139 * As we set up the PLL to output 133 MHz for UltraDMA/133 capable
140 * chips, we must override the default register settings...
141 */
142 if (max_dma_rate(dev) == 4) {
143 u8 mode = speed & 0x07;
144
145 if (speed >= XFER_UDMA_0) {
146 set_indexed_reg(hwif, 0x10 + adj,
147 udma_timings[mode].reg10);
148 set_indexed_reg(hwif, 0x11 + adj,
149 udma_timings[mode].reg11);
150 set_indexed_reg(hwif, 0x12 + adj,
151 udma_timings[mode].reg12);
152 } else {
153 set_indexed_reg(hwif, 0x0e + adj,
154 mwdma_timings[mode].reg0e);
155 set_indexed_reg(hwif, 0x0f + adj,
156 mwdma_timings[mode].reg0f);
157 }
158 } else if (speed == XFER_UDMA_2) {
159 /* Set tHOLD bit to 0 if using UDMA mode 2 */
160 u8 tmp = get_indexed_reg(hwif, 0x10 + adj);
161
162 set_indexed_reg(hwif, 0x10 + adj, tmp & 0x7f);
163 }
164}
165
166static void pdcnew_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
167{
168 struct pci_dev *dev = to_pci_dev(hwif->dev);
169 u8 adj = (drive->dn & 1) ? 0x08 : 0x00;
170 const u8 pio = drive->pio_mode - XFER_PIO_0;
171
172 if (max_dma_rate(dev) == 4) {
173 set_indexed_reg(hwif, 0x0c + adj, pio_timings[pio].reg0c);
174 set_indexed_reg(hwif, 0x0d + adj, pio_timings[pio].reg0d);
175 set_indexed_reg(hwif, 0x13 + adj, pio_timings[pio].reg13);
176 }
177}
178
179static u8 pdcnew_cable_detect(ide_hwif_t *hwif)
180{
181 if (get_indexed_reg(hwif, 0x0b) & 0x04)
182 return ATA_CBL_PATA40;
183 else
184 return ATA_CBL_PATA80;
185}
186
187static void pdcnew_reset(ide_drive_t *drive)
188{
189 /*
190 * Deleted this because it is redundant from the caller.
191 */
192 printk(KERN_WARNING "pdc202xx_new: %s channel reset.\n",
193 drive->hwif->channel ? "Secondary" : "Primary");
194}
195
196/**
197 * read_counter - Read the byte count registers
198 * @dma_base: for the port address
199 */
200static long read_counter(u32 dma_base)
201{
202 u32 pri_dma_base = dma_base, sec_dma_base = dma_base + 0x08;
203 u8 cnt0, cnt1, cnt2, cnt3;
204 long count = 0, last;
205 int retry = 3;
206
207 do {
208 last = count;
209
210 /* Read the current count */
211 outb(0x20, pri_dma_base + 0x01);
212 cnt0 = inb(pri_dma_base + 0x03);
213 outb(0x21, pri_dma_base + 0x01);
214 cnt1 = inb(pri_dma_base + 0x03);
215 outb(0x20, sec_dma_base + 0x01);
216 cnt2 = inb(sec_dma_base + 0x03);
217 outb(0x21, sec_dma_base + 0x01);
218 cnt3 = inb(sec_dma_base + 0x03);
219
220 count = (cnt3 << 23) | (cnt2 << 15) | (cnt1 << 8) | cnt0;
221
222 /*
223 * The 30-bit decrementing counter is read in 4 pieces.
224 * Incorrect value may be read when the most significant bytes
225 * are changing...
226 */
227 } while (retry-- && (((last ^ count) & 0x3fff8000) || last < count));
228
229 DBG("cnt0[%02X] cnt1[%02X] cnt2[%02X] cnt3[%02X]\n",
230 cnt0, cnt1, cnt2, cnt3);
231
232 return count;
233}
234
235/**
236 * detect_pll_input_clock - Detect the PLL input clock in Hz.
237 * @dma_base: for the port address
238 * E.g. 16949000 on 33 MHz PCI bus, i.e. half of the PCI clock.
239 */
240static long detect_pll_input_clock(unsigned long dma_base)
241{
242 ktime_t start_time, end_time;
243 long start_count, end_count;
244 long pll_input, usec_elapsed;
245 u8 scr1;
246
247 start_count = read_counter(dma_base);
248 start_time = ktime_get();
249
250 /* Start the test mode */
251 outb(0x01, dma_base + 0x01);
252 scr1 = inb(dma_base + 0x03);
253 DBG("scr1[%02X]\n", scr1);
254 outb(scr1 | 0x40, dma_base + 0x03);
255
256 /* Let the counter run for 10 ms. */
257 mdelay(10);
258
259 end_count = read_counter(dma_base);
260 end_time = ktime_get();
261
262 /* Stop the test mode */
263 outb(0x01, dma_base + 0x01);
264 scr1 = inb(dma_base + 0x03);
265 DBG("scr1[%02X]\n", scr1);
266 outb(scr1 & ~0x40, dma_base + 0x03);
267
268 /*
269 * Calculate the input clock in Hz
270 * (the clock counter is 30 bit wide and counts down)
271 */
272 usec_elapsed = ktime_us_delta(end_time, start_time);
273 pll_input = ((start_count - end_count) & 0x3fffffff) / 10 *
274 (10000000 / usec_elapsed);
275
276 DBG("start[%ld] end[%ld]\n", start_count, end_count);
277
278 return pll_input;
279}
280
281#ifdef CONFIG_PPC_PMAC
282static void apple_kiwi_init(struct pci_dev *pdev)
283{
284 struct device_node *np = pci_device_to_OF_node(pdev);
285 u8 conf;
286
287 if (np == NULL || !of_device_is_compatible(np, "kiwi-root"))
288 return;
289
290 if (pdev->revision >= 0x03) {
291 /* Setup chip magic config stuff (from darwin) */
292 pci_read_config_byte (pdev, 0x40, &conf);
293 pci_write_config_byte(pdev, 0x40, (conf | 0x01));
294 }
295}
296#endif /* CONFIG_PPC_PMAC */
297
298static int init_chipset_pdcnew(struct pci_dev *dev)
299{
300 const char *name = DRV_NAME;
301 unsigned long dma_base = pci_resource_start(dev, 4);
302 unsigned long sec_dma_base = dma_base + 0x08;
303 long pll_input, pll_output, ratio;
304 int f, r;
305 u8 pll_ctl0, pll_ctl1;
306
307 if (dma_base == 0)
308 return -EFAULT;
309
310#ifdef CONFIG_PPC_PMAC
311 apple_kiwi_init(dev);
312#endif
313
314 /* Calculate the required PLL output frequency */
315 switch(max_dma_rate(dev)) {
316 case 4: /* it's 133 MHz for Ultra133 chips */
317 pll_output = 133333333;
318 break;
319 case 3: /* and 100 MHz for Ultra100 chips */
320 default:
321 pll_output = 100000000;
322 break;
323 }
324
325 /*
326 * Detect PLL input clock.
327 * On some systems, where PCI bus is running at non-standard clock rate
328 * (e.g. 25 or 40 MHz), we have to adjust the cycle time.
329 * PDC20268 and newer chips employ PLL circuit to help correct timing
330 * registers setting.
331 */
332 pll_input = detect_pll_input_clock(dma_base);
333 printk(KERN_INFO "%s %s: PLL input clock is %ld kHz\n",
334 name, pci_name(dev), pll_input / 1000);
335
336 /* Sanity check */
337 if (unlikely(pll_input < 5000000L || pll_input > 70000000L)) {
338 printk(KERN_ERR "%s %s: Bad PLL input clock %ld Hz, giving up!"
339 "\n", name, pci_name(dev), pll_input);
340 goto out;
341 }
342
343#ifdef DEBUG
344 DBG("pll_output is %ld Hz\n", pll_output);
345
346 /* Show the current clock value of PLL control register
347 * (maybe already configured by the BIOS)
348 */
349 outb(0x02, sec_dma_base + 0x01);
350 pll_ctl0 = inb(sec_dma_base + 0x03);
351 outb(0x03, sec_dma_base + 0x01);
352 pll_ctl1 = inb(sec_dma_base + 0x03);
353
354 DBG("pll_ctl[%02X][%02X]\n", pll_ctl0, pll_ctl1);
355#endif
356
357 /*
358 * Calculate the ratio of F, R and NO
359 * POUT = (F + 2) / (( R + 2) * NO)
360 */
361 ratio = pll_output / (pll_input / 1000);
362 if (ratio < 8600L) { /* 8.6x */
363 /* Using NO = 0x01, R = 0x0d */
364 r = 0x0d;
365 } else if (ratio < 12900L) { /* 12.9x */
366 /* Using NO = 0x01, R = 0x08 */
367 r = 0x08;
368 } else if (ratio < 16100L) { /* 16.1x */
369 /* Using NO = 0x01, R = 0x06 */
370 r = 0x06;
371 } else if (ratio < 64000L) { /* 64x */
372 r = 0x00;
373 } else {
374 /* Invalid ratio */
375 printk(KERN_ERR "%s %s: Bad ratio %ld, giving up!\n",
376 name, pci_name(dev), ratio);
377 goto out;
378 }
379
380 f = (ratio * (r + 2)) / 1000 - 2;
381
382 DBG("F[%d] R[%d] ratio*1000[%ld]\n", f, r, ratio);
383
384 if (unlikely(f < 0 || f > 127)) {
385 /* Invalid F */
386 printk(KERN_ERR "%s %s: F[%d] invalid!\n",
387 name, pci_name(dev), f);
388 goto out;
389 }
390
391 pll_ctl0 = (u8) f;
392 pll_ctl1 = (u8) r;
393
394 DBG("Writing pll_ctl[%02X][%02X]\n", pll_ctl0, pll_ctl1);
395
396 outb(0x02, sec_dma_base + 0x01);
397 outb(pll_ctl0, sec_dma_base + 0x03);
398 outb(0x03, sec_dma_base + 0x01);
399 outb(pll_ctl1, sec_dma_base + 0x03);
400
401 /* Wait the PLL circuit to be stable */
402 mdelay(30);
403
404#ifdef DEBUG
405 /*
406 * Show the current clock value of PLL control register
407 */
408 outb(0x02, sec_dma_base + 0x01);
409 pll_ctl0 = inb(sec_dma_base + 0x03);
410 outb(0x03, sec_dma_base + 0x01);
411 pll_ctl1 = inb(sec_dma_base + 0x03);
412
413 DBG("pll_ctl[%02X][%02X]\n", pll_ctl0, pll_ctl1);
414#endif
415
416 out:
417 return 0;
418}
419
420static struct pci_dev *pdc20270_get_dev2(struct pci_dev *dev)
421{
422 struct pci_dev *dev2;
423
424 dev2 = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn) + 1,
425 PCI_FUNC(dev->devfn)));
426
427 if (dev2 &&
428 dev2->vendor == dev->vendor &&
429 dev2->device == dev->device) {
430
431 if (dev2->irq != dev->irq) {
432 dev2->irq = dev->irq;
433 printk(KERN_INFO DRV_NAME " %s: PCI config space "
434 "interrupt fixed\n", pci_name(dev));
435 }
436
437 return dev2;
438 }
439
440 return NULL;
441}
442
443static const struct ide_port_ops pdcnew_port_ops = {
444 .set_pio_mode = pdcnew_set_pio_mode,
445 .set_dma_mode = pdcnew_set_dma_mode,
446 .resetproc = pdcnew_reset,
447 .cable_detect = pdcnew_cable_detect,
448};
449
450#define DECLARE_PDCNEW_DEV(udma) \
451 { \
452 .name = DRV_NAME, \
453 .init_chipset = init_chipset_pdcnew, \
454 .port_ops = &pdcnew_port_ops, \
455 .host_flags = IDE_HFLAG_POST_SET_MODE | \
456 IDE_HFLAG_ERROR_STOPS_FIFO | \
457 IDE_HFLAG_OFF_BOARD, \
458 .pio_mask = ATA_PIO4, \
459 .mwdma_mask = ATA_MWDMA2, \
460 .udma_mask = udma, \
461 }
462
463static const struct ide_port_info pdcnew_chipsets[] = {
464 /* 0: PDC202{68,70} */ DECLARE_PDCNEW_DEV(ATA_UDMA5),
465 /* 1: PDC202{69,71,75,76,77} */ DECLARE_PDCNEW_DEV(ATA_UDMA6),
466};
467
468/**
469 * pdc202new_init_one - called when a pdc202xx is found
470 * @dev: the pdc202new device
471 * @id: the matching pci id
472 *
473 * Called when the PCI registration layer (or the IDE initialization)
474 * finds a device matching our IDE device tables.
475 */
476
477static int pdc202new_init_one(struct pci_dev *dev, const struct pci_device_id *id)
478{
479 const struct ide_port_info *d = &pdcnew_chipsets[id->driver_data];
480 struct pci_dev *bridge = dev->bus->self;
481
482 if (dev->device == PCI_DEVICE_ID_PROMISE_20270 && bridge &&
483 bridge->vendor == PCI_VENDOR_ID_DEC &&
484 bridge->device == PCI_DEVICE_ID_DEC_21150) {
485 struct pci_dev *dev2;
486
487 if (PCI_SLOT(dev->devfn) & 2)
488 return -ENODEV;
489
490 dev2 = pdc20270_get_dev2(dev);
491
492 if (dev2) {
493 int ret = ide_pci_init_two(dev, dev2, d, NULL);
494 if (ret < 0)
495 pci_dev_put(dev2);
496 return ret;
497 }
498 }
499
500 if (dev->device == PCI_DEVICE_ID_PROMISE_20276 && bridge &&
501 bridge->vendor == PCI_VENDOR_ID_INTEL &&
502 (bridge->device == PCI_DEVICE_ID_INTEL_I960 ||
503 bridge->device == PCI_DEVICE_ID_INTEL_I960RM)) {
504 printk(KERN_INFO DRV_NAME " %s: attached to I2O RAID controller,"
505 " skipping\n", pci_name(dev));
506 return -ENODEV;
507 }
508
509 return ide_pci_init_one(dev, d, NULL);
510}
511
512static void pdc202new_remove(struct pci_dev *dev)
513{
514 struct ide_host *host = pci_get_drvdata(dev);
515 struct pci_dev *dev2 = host->dev[1] ? to_pci_dev(host->dev[1]) : NULL;
516
517 ide_pci_remove(dev);
518 pci_dev_put(dev2);
519}
520
521static const struct pci_device_id pdc202new_pci_tbl[] = {
522 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20268), 0 },
523 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20269), 1 },
524 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20270), 0 },
525 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20271), 1 },
526 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20275), 1 },
527 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20276), 1 },
528 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20277), 1 },
529 { 0, },
530};
531MODULE_DEVICE_TABLE(pci, pdc202new_pci_tbl);
532
533static struct pci_driver pdc202new_pci_driver = {
534 .name = "Promise_IDE",
535 .id_table = pdc202new_pci_tbl,
536 .probe = pdc202new_init_one,
537 .remove = pdc202new_remove,
538 .suspend = ide_pci_suspend,
539 .resume = ide_pci_resume,
540};
541
542static int __init pdc202new_ide_init(void)
543{
544 return ide_pci_register_driver(&pdc202new_pci_driver);
545}
546
547static void __exit pdc202new_ide_exit(void)
548{
549 pci_unregister_driver(&pdc202new_pci_driver);
550}
551
552module_init(pdc202new_ide_init);
553module_exit(pdc202new_ide_exit);
554
555MODULE_AUTHOR("Andre Hedrick, Frank Tiernan");
556MODULE_DESCRIPTION("PCI driver module for Promise PDC20268 and higher");
557MODULE_LICENSE("GPL");
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#include <linux/ktime.h>
26
27#include <asm/io.h>
28
29#ifdef CONFIG_PPC_PMAC
30#include <asm/prom.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
43static 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 */
71static 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 */
87static 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 */
102static 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
112static 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
120static 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
132static 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
170static 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
183static 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
191static 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 */
204static 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 */
244static long detect_pll_input_clock(unsigned long dma_base)
245{
246 ktime_t 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 start_time = ktime_get();
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 end_time = ktime_get();
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 = ktime_us_delta(end_time, start_time);
277 pll_input = ((start_count - end_count) & 0x3fffffff) / 10 *
278 (10000000 / usec_elapsed);
279
280 DBG("start[%ld] end[%ld]\n", start_count, end_count);
281
282 return pll_input;
283}
284
285#ifdef CONFIG_PPC_PMAC
286static void apple_kiwi_init(struct pci_dev *pdev)
287{
288 struct device_node *np = pci_device_to_OF_node(pdev);
289 u8 conf;
290
291 if (np == NULL || !of_device_is_compatible(np, "kiwi-root"))
292 return;
293
294 if (pdev->revision >= 0x03) {
295 /* Setup chip magic config stuff (from darwin) */
296 pci_read_config_byte (pdev, 0x40, &conf);
297 pci_write_config_byte(pdev, 0x40, (conf | 0x01));
298 }
299}
300#endif /* CONFIG_PPC_PMAC */
301
302static int init_chipset_pdcnew(struct pci_dev *dev)
303{
304 const char *name = DRV_NAME;
305 unsigned long dma_base = pci_resource_start(dev, 4);
306 unsigned long sec_dma_base = dma_base + 0x08;
307 long pll_input, pll_output, ratio;
308 int f, r;
309 u8 pll_ctl0, pll_ctl1;
310
311 if (dma_base == 0)
312 return -EFAULT;
313
314#ifdef CONFIG_PPC_PMAC
315 apple_kiwi_init(dev);
316#endif
317
318 /* Calculate the required PLL output frequency */
319 switch(max_dma_rate(dev)) {
320 case 4: /* it's 133 MHz for Ultra133 chips */
321 pll_output = 133333333;
322 break;
323 case 3: /* and 100 MHz for Ultra100 chips */
324 default:
325 pll_output = 100000000;
326 break;
327 }
328
329 /*
330 * Detect PLL input clock.
331 * On some systems, where PCI bus is running at non-standard clock rate
332 * (e.g. 25 or 40 MHz), we have to adjust the cycle time.
333 * PDC20268 and newer chips employ PLL circuit to help correct timing
334 * registers setting.
335 */
336 pll_input = detect_pll_input_clock(dma_base);
337 printk(KERN_INFO "%s %s: PLL input clock is %ld kHz\n",
338 name, pci_name(dev), pll_input / 1000);
339
340 /* Sanity check */
341 if (unlikely(pll_input < 5000000L || pll_input > 70000000L)) {
342 printk(KERN_ERR "%s %s: Bad PLL input clock %ld Hz, giving up!"
343 "\n", name, pci_name(dev), pll_input);
344 goto out;
345 }
346
347#ifdef DEBUG
348 DBG("pll_output is %ld Hz\n", pll_output);
349
350 /* Show the current clock value of PLL control register
351 * (maybe already configured by the BIOS)
352 */
353 outb(0x02, sec_dma_base + 0x01);
354 pll_ctl0 = inb(sec_dma_base + 0x03);
355 outb(0x03, sec_dma_base + 0x01);
356 pll_ctl1 = inb(sec_dma_base + 0x03);
357
358 DBG("pll_ctl[%02X][%02X]\n", pll_ctl0, pll_ctl1);
359#endif
360
361 /*
362 * Calculate the ratio of F, R and NO
363 * POUT = (F + 2) / (( R + 2) * NO)
364 */
365 ratio = pll_output / (pll_input / 1000);
366 if (ratio < 8600L) { /* 8.6x */
367 /* Using NO = 0x01, R = 0x0d */
368 r = 0x0d;
369 } else if (ratio < 12900L) { /* 12.9x */
370 /* Using NO = 0x01, R = 0x08 */
371 r = 0x08;
372 } else if (ratio < 16100L) { /* 16.1x */
373 /* Using NO = 0x01, R = 0x06 */
374 r = 0x06;
375 } else if (ratio < 64000L) { /* 64x */
376 r = 0x00;
377 } else {
378 /* Invalid ratio */
379 printk(KERN_ERR "%s %s: Bad ratio %ld, giving up!\n",
380 name, pci_name(dev), ratio);
381 goto out;
382 }
383
384 f = (ratio * (r + 2)) / 1000 - 2;
385
386 DBG("F[%d] R[%d] ratio*1000[%ld]\n", f, r, ratio);
387
388 if (unlikely(f < 0 || f > 127)) {
389 /* Invalid F */
390 printk(KERN_ERR "%s %s: F[%d] invalid!\n",
391 name, pci_name(dev), f);
392 goto out;
393 }
394
395 pll_ctl0 = (u8) f;
396 pll_ctl1 = (u8) r;
397
398 DBG("Writing pll_ctl[%02X][%02X]\n", pll_ctl0, pll_ctl1);
399
400 outb(0x02, sec_dma_base + 0x01);
401 outb(pll_ctl0, sec_dma_base + 0x03);
402 outb(0x03, sec_dma_base + 0x01);
403 outb(pll_ctl1, sec_dma_base + 0x03);
404
405 /* Wait the PLL circuit to be stable */
406 mdelay(30);
407
408#ifdef DEBUG
409 /*
410 * Show the current clock value of PLL control register
411 */
412 outb(0x02, sec_dma_base + 0x01);
413 pll_ctl0 = inb(sec_dma_base + 0x03);
414 outb(0x03, sec_dma_base + 0x01);
415 pll_ctl1 = inb(sec_dma_base + 0x03);
416
417 DBG("pll_ctl[%02X][%02X]\n", pll_ctl0, pll_ctl1);
418#endif
419
420 out:
421 return 0;
422}
423
424static struct pci_dev *pdc20270_get_dev2(struct pci_dev *dev)
425{
426 struct pci_dev *dev2;
427
428 dev2 = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn) + 1,
429 PCI_FUNC(dev->devfn)));
430
431 if (dev2 &&
432 dev2->vendor == dev->vendor &&
433 dev2->device == dev->device) {
434
435 if (dev2->irq != dev->irq) {
436 dev2->irq = dev->irq;
437 printk(KERN_INFO DRV_NAME " %s: PCI config space "
438 "interrupt fixed\n", pci_name(dev));
439 }
440
441 return dev2;
442 }
443
444 return NULL;
445}
446
447static const struct ide_port_ops pdcnew_port_ops = {
448 .set_pio_mode = pdcnew_set_pio_mode,
449 .set_dma_mode = pdcnew_set_dma_mode,
450 .resetproc = pdcnew_reset,
451 .cable_detect = pdcnew_cable_detect,
452};
453
454#define DECLARE_PDCNEW_DEV(udma) \
455 { \
456 .name = DRV_NAME, \
457 .init_chipset = init_chipset_pdcnew, \
458 .port_ops = &pdcnew_port_ops, \
459 .host_flags = IDE_HFLAG_POST_SET_MODE | \
460 IDE_HFLAG_ERROR_STOPS_FIFO | \
461 IDE_HFLAG_OFF_BOARD, \
462 .pio_mask = ATA_PIO4, \
463 .mwdma_mask = ATA_MWDMA2, \
464 .udma_mask = udma, \
465 }
466
467static const struct ide_port_info pdcnew_chipsets[] = {
468 /* 0: PDC202{68,70} */ DECLARE_PDCNEW_DEV(ATA_UDMA5),
469 /* 1: PDC202{69,71,75,76,77} */ DECLARE_PDCNEW_DEV(ATA_UDMA6),
470};
471
472/**
473 * pdc202new_init_one - called when a pdc202xx is found
474 * @dev: the pdc202new device
475 * @id: the matching pci id
476 *
477 * Called when the PCI registration layer (or the IDE initialization)
478 * finds a device matching our IDE device tables.
479 */
480
481static int pdc202new_init_one(struct pci_dev *dev, const struct pci_device_id *id)
482{
483 const struct ide_port_info *d = &pdcnew_chipsets[id->driver_data];
484 struct pci_dev *bridge = dev->bus->self;
485
486 if (dev->device == PCI_DEVICE_ID_PROMISE_20270 && bridge &&
487 bridge->vendor == PCI_VENDOR_ID_DEC &&
488 bridge->device == PCI_DEVICE_ID_DEC_21150) {
489 struct pci_dev *dev2;
490
491 if (PCI_SLOT(dev->devfn) & 2)
492 return -ENODEV;
493
494 dev2 = pdc20270_get_dev2(dev);
495
496 if (dev2) {
497 int ret = ide_pci_init_two(dev, dev2, d, NULL);
498 if (ret < 0)
499 pci_dev_put(dev2);
500 return ret;
501 }
502 }
503
504 if (dev->device == PCI_DEVICE_ID_PROMISE_20276 && bridge &&
505 bridge->vendor == PCI_VENDOR_ID_INTEL &&
506 (bridge->device == PCI_DEVICE_ID_INTEL_I960 ||
507 bridge->device == PCI_DEVICE_ID_INTEL_I960RM)) {
508 printk(KERN_INFO DRV_NAME " %s: attached to I2O RAID controller,"
509 " skipping\n", pci_name(dev));
510 return -ENODEV;
511 }
512
513 return ide_pci_init_one(dev, d, NULL);
514}
515
516static void pdc202new_remove(struct pci_dev *dev)
517{
518 struct ide_host *host = pci_get_drvdata(dev);
519 struct pci_dev *dev2 = host->dev[1] ? to_pci_dev(host->dev[1]) : NULL;
520
521 ide_pci_remove(dev);
522 pci_dev_put(dev2);
523}
524
525static const struct pci_device_id pdc202new_pci_tbl[] = {
526 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20268), 0 },
527 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20269), 1 },
528 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20270), 0 },
529 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20271), 1 },
530 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20275), 1 },
531 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20276), 1 },
532 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20277), 1 },
533 { 0, },
534};
535MODULE_DEVICE_TABLE(pci, pdc202new_pci_tbl);
536
537static struct pci_driver pdc202new_pci_driver = {
538 .name = "Promise_IDE",
539 .id_table = pdc202new_pci_tbl,
540 .probe = pdc202new_init_one,
541 .remove = pdc202new_remove,
542 .suspend = ide_pci_suspend,
543 .resume = ide_pci_resume,
544};
545
546static int __init pdc202new_ide_init(void)
547{
548 return ide_pci_register_driver(&pdc202new_pci_driver);
549}
550
551static void __exit pdc202new_ide_exit(void)
552{
553 pci_unregister_driver(&pdc202new_pci_driver);
554}
555
556module_init(pdc202new_ide_init);
557module_exit(pdc202new_ide_exit);
558
559MODULE_AUTHOR("Andre Hedrick, Frank Tiernan");
560MODULE_DESCRIPTION("PCI driver module for Promise PDC20268 and higher");
561MODULE_LICENSE("GPL");