blob: 1050fed96b2bfdc1f1e948e86a874eb03d6c9165 [file] [log] [blame]
Sonic Zhangd830d172007-08-21 13:12:31 +08001/*
2 * File: drivers/ata/pata_bf54x.c
3 * Author: Sonic Zhang <sonic.zhang@analog.com>
4 *
5 * Created:
6 * Description: PATA Driver for blackfin 54x
7 *
8 * Modified:
9 * Copyright 2007 Analog Devices Inc.
10 *
11 * Bugs: Enter bugs at http://blackfin.uclinux.org/
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, see the file COPYING, or write
25 * to the Free Software Foundation, Inc.,
26 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
27 */
28
29#include <linux/kernel.h>
30#include <linux/module.h>
31#include <linux/pci.h>
32#include <linux/init.h>
33#include <linux/blkdev.h>
34#include <linux/delay.h>
35#include <linux/device.h>
36#include <scsi/scsi_host.h>
37#include <linux/libata.h>
38#include <linux/platform_device.h>
39#include <asm/dma.h>
40#include <asm/gpio.h>
41#include <asm/portmux.h>
42
43#define DRV_NAME "pata-bf54x"
44#define DRV_VERSION "0.9"
45
46#define ATA_REG_CTRL 0x0E
47#define ATA_REG_ALTSTATUS ATA_REG_CTRL
48
49/* These are the offset of the controller's registers */
50#define ATAPI_OFFSET_CONTROL 0x00
51#define ATAPI_OFFSET_STATUS 0x04
52#define ATAPI_OFFSET_DEV_ADDR 0x08
53#define ATAPI_OFFSET_DEV_TXBUF 0x0c
54#define ATAPI_OFFSET_DEV_RXBUF 0x10
55#define ATAPI_OFFSET_INT_MASK 0x14
56#define ATAPI_OFFSET_INT_STATUS 0x18
57#define ATAPI_OFFSET_XFER_LEN 0x1c
58#define ATAPI_OFFSET_LINE_STATUS 0x20
59#define ATAPI_OFFSET_SM_STATE 0x24
60#define ATAPI_OFFSET_TERMINATE 0x28
61#define ATAPI_OFFSET_PIO_TFRCNT 0x2c
62#define ATAPI_OFFSET_DMA_TFRCNT 0x30
63#define ATAPI_OFFSET_UMAIN_TFRCNT 0x34
64#define ATAPI_OFFSET_UDMAOUT_TFRCNT 0x38
65#define ATAPI_OFFSET_REG_TIM_0 0x40
66#define ATAPI_OFFSET_PIO_TIM_0 0x44
67#define ATAPI_OFFSET_PIO_TIM_1 0x48
68#define ATAPI_OFFSET_MULTI_TIM_0 0x50
69#define ATAPI_OFFSET_MULTI_TIM_1 0x54
70#define ATAPI_OFFSET_MULTI_TIM_2 0x58
71#define ATAPI_OFFSET_ULTRA_TIM_0 0x60
72#define ATAPI_OFFSET_ULTRA_TIM_1 0x64
73#define ATAPI_OFFSET_ULTRA_TIM_2 0x68
74#define ATAPI_OFFSET_ULTRA_TIM_3 0x6c
75
76
77#define ATAPI_GET_CONTROL(base)\
78 bfin_read16(base + ATAPI_OFFSET_CONTROL)
79#define ATAPI_SET_CONTROL(base, val)\
80 bfin_write16(base + ATAPI_OFFSET_CONTROL, val)
81#define ATAPI_GET_STATUS(base)\
82 bfin_read16(base + ATAPI_OFFSET_STATUS)
83#define ATAPI_GET_DEV_ADDR(base)\
84 bfin_read16(base + ATAPI_OFFSET_DEV_ADDR)
85#define ATAPI_SET_DEV_ADDR(base, val)\
86 bfin_write16(base + ATAPI_OFFSET_DEV_ADDR, val)
87#define ATAPI_GET_DEV_TXBUF(base)\
88 bfin_read16(base + ATAPI_OFFSET_DEV_TXBUF)
89#define ATAPI_SET_DEV_TXBUF(base, val)\
90 bfin_write16(base + ATAPI_OFFSET_DEV_TXBUF, val)
91#define ATAPI_GET_DEV_RXBUF(base)\
92 bfin_read16(base + ATAPI_OFFSET_DEV_RXBUF)
93#define ATAPI_SET_DEV_RXBUF(base, val)\
94 bfin_write16(base + ATAPI_OFFSET_DEV_RXBUF, val)
95#define ATAPI_GET_INT_MASK(base)\
96 bfin_read16(base + ATAPI_OFFSET_INT_MASK)
97#define ATAPI_SET_INT_MASK(base, val)\
98 bfin_write16(base + ATAPI_OFFSET_INT_MASK, val)
99#define ATAPI_GET_INT_STATUS(base)\
100 bfin_read16(base + ATAPI_OFFSET_INT_STATUS)
101#define ATAPI_SET_INT_STATUS(base, val)\
102 bfin_write16(base + ATAPI_OFFSET_INT_STATUS, val)
103#define ATAPI_GET_XFER_LEN(base)\
104 bfin_read16(base + ATAPI_OFFSET_XFER_LEN)
105#define ATAPI_SET_XFER_LEN(base, val)\
106 bfin_write16(base + ATAPI_OFFSET_XFER_LEN, val)
107#define ATAPI_GET_LINE_STATUS(base)\
108 bfin_read16(base + ATAPI_OFFSET_LINE_STATUS)
109#define ATAPI_GET_SM_STATE(base)\
110 bfin_read16(base + ATAPI_OFFSET_SM_STATE)
111#define ATAPI_GET_TERMINATE(base)\
112 bfin_read16(base + ATAPI_OFFSET_TERMINATE)
113#define ATAPI_SET_TERMINATE(base, val)\
114 bfin_write16(base + ATAPI_OFFSET_TERMINATE, val)
115#define ATAPI_GET_PIO_TFRCNT(base)\
116 bfin_read16(base + ATAPI_OFFSET_PIO_TFRCNT)
117#define ATAPI_GET_DMA_TFRCNT(base)\
118 bfin_read16(base + ATAPI_OFFSET_DMA_TFRCNT)
119#define ATAPI_GET_UMAIN_TFRCNT(base)\
120 bfin_read16(base + ATAPI_OFFSET_UMAIN_TFRCNT)
121#define ATAPI_GET_UDMAOUT_TFRCNT(base)\
122 bfin_read16(base + ATAPI_OFFSET_UDMAOUT_TFRCNT)
123#define ATAPI_GET_REG_TIM_0(base)\
124 bfin_read16(base + ATAPI_OFFSET_REG_TIM_0)
125#define ATAPI_SET_REG_TIM_0(base, val)\
126 bfin_write16(base + ATAPI_OFFSET_REG_TIM_0, val)
127#define ATAPI_GET_PIO_TIM_0(base)\
128 bfin_read16(base + ATAPI_OFFSET_PIO_TIM_0)
129#define ATAPI_SET_PIO_TIM_0(base, val)\
130 bfin_write16(base + ATAPI_OFFSET_PIO_TIM_0, val)
131#define ATAPI_GET_PIO_TIM_1(base)\
132 bfin_read16(base + ATAPI_OFFSET_PIO_TIM_1)
133#define ATAPI_SET_PIO_TIM_1(base, val)\
134 bfin_write16(base + ATAPI_OFFSET_PIO_TIM_1, val)
135#define ATAPI_GET_MULTI_TIM_0(base)\
136 bfin_read16(base + ATAPI_OFFSET_MULTI_TIM_0)
137#define ATAPI_SET_MULTI_TIM_0(base, val)\
138 bfin_write16(base + ATAPI_OFFSET_MULTI_TIM_0, val)
139#define ATAPI_GET_MULTI_TIM_1(base)\
140 bfin_read16(base + ATAPI_OFFSET_MULTI_TIM_1)
141#define ATAPI_SET_MULTI_TIM_1(base, val)\
142 bfin_write16(base + ATAPI_OFFSET_MULTI_TIM_1, val)
143#define ATAPI_GET_MULTI_TIM_2(base)\
144 bfin_read16(base + ATAPI_OFFSET_MULTI_TIM_2)
145#define ATAPI_SET_MULTI_TIM_2(base, val)\
146 bfin_write16(base + ATAPI_OFFSET_MULTI_TIM_2, val)
147#define ATAPI_GET_ULTRA_TIM_0(base)\
148 bfin_read16(base + ATAPI_OFFSET_ULTRA_TIM_0)
149#define ATAPI_SET_ULTRA_TIM_0(base, val)\
150 bfin_write16(base + ATAPI_OFFSET_ULTRA_TIM_0, val)
151#define ATAPI_GET_ULTRA_TIM_1(base)\
152 bfin_read16(base + ATAPI_OFFSET_ULTRA_TIM_1)
153#define ATAPI_SET_ULTRA_TIM_1(base, val)\
154 bfin_write16(base + ATAPI_OFFSET_ULTRA_TIM_1, val)
155#define ATAPI_GET_ULTRA_TIM_2(base)\
156 bfin_read16(base + ATAPI_OFFSET_ULTRA_TIM_2)
157#define ATAPI_SET_ULTRA_TIM_2(base, val)\
158 bfin_write16(base + ATAPI_OFFSET_ULTRA_TIM_2, val)
159#define ATAPI_GET_ULTRA_TIM_3(base)\
160 bfin_read16(base + ATAPI_OFFSET_ULTRA_TIM_3)
161#define ATAPI_SET_ULTRA_TIM_3(base, val)\
162 bfin_write16(base + ATAPI_OFFSET_ULTRA_TIM_3, val)
163
164/**
165 * PIO Mode - Frequency compatibility
166 */
167/* mode: 0 1 2 3 4 */
168static const u32 pio_fsclk[] =
169{ 33333333, 33333333, 33333333, 33333333, 33333333 };
170
171/**
172 * MDMA Mode - Frequency compatibility
173 */
174/* mode: 0 1 2 */
175static const u32 mdma_fsclk[] = { 33333333, 33333333, 33333333 };
176
177/**
178 * UDMA Mode - Frequency compatibility
179 *
180 * UDMA5 - 100 MB/s - SCLK = 133 MHz
181 * UDMA4 - 66 MB/s - SCLK >= 80 MHz
182 * UDMA3 - 44.4 MB/s - SCLK >= 50 MHz
183 * UDMA2 - 33 MB/s - SCLK >= 40 MHz
184 */
185/* mode: 0 1 2 3 4 5 */
186static const u32 udma_fsclk[] =
187{ 33333333, 33333333, 40000000, 50000000, 80000000, 133333333 };
188
189/**
190 * Register transfer timing table
191 */
192/* mode: 0 1 2 3 4 */
193/* Cycle Time */
194static const u32 reg_t0min[] = { 600, 383, 330, 180, 120 };
195/* DIOR/DIOW to end cycle */
196static const u32 reg_t2min[] = { 290, 290, 290, 70, 25 };
197/* DIOR/DIOW asserted pulse width */
198static const u32 reg_teocmin[] = { 290, 290, 290, 80, 70 };
199
200/**
201 * PIO timing table
202 */
203/* mode: 0 1 2 3 4 */
204/* Cycle Time */
205static const u32 pio_t0min[] = { 600, 383, 240, 180, 120 };
206/* Address valid to DIOR/DIORW */
207static const u32 pio_t1min[] = { 70, 50, 30, 30, 25 };
208/* DIOR/DIOW to end cycle */
209static const u32 pio_t2min[] = { 165, 125, 100, 80, 70 };
210/* DIOR/DIOW asserted pulse width */
211static const u32 pio_teocmin[] = { 165, 125, 100, 70, 25 };
212/* DIOW data hold */
213static const u32 pio_t4min[] = { 30, 20, 15, 10, 10 };
214
215/* ******************************************************************
216 * Multiword DMA timing table
217 * ******************************************************************
218 */
219/* mode: 0 1 2 */
220/* Cycle Time */
221static const u32 mdma_t0min[] = { 480, 150, 120 };
222/* DIOR/DIOW asserted pulse width */
223static const u32 mdma_tdmin[] = { 215, 80, 70 };
224/* DMACK to read data released */
225static const u32 mdma_thmin[] = { 20, 15, 10 };
226/* DIOR/DIOW to DMACK hold */
227static const u32 mdma_tjmin[] = { 20, 5, 5 };
228/* DIOR negated pulse width */
229static const u32 mdma_tkrmin[] = { 50, 50, 25 };
230/* DIOR negated pulse width */
231static const u32 mdma_tkwmin[] = { 215, 50, 25 };
232/* CS[1:0] valid to DIOR/DIOW */
233static const u32 mdma_tmmin[] = { 50, 30, 25 };
234/* DMACK to read data released */
235static const u32 mdma_tzmax[] = { 20, 25, 25 };
236
237/**
238 * Ultra DMA timing table
239 */
240/* mode: 0 1 2 3 4 5 */
241static const u32 udma_tcycmin[] = { 112, 73, 54, 39, 25, 17 };
242static const u32 udma_tdvsmin[] = { 70, 48, 31, 20, 7, 5 };
243static const u32 udma_tenvmax[] = { 70, 70, 70, 55, 55, 50 };
244static const u32 udma_trpmin[] = { 160, 125, 100, 100, 100, 85 };
245static const u32 udma_tmin[] = { 5, 5, 5, 5, 3, 3 };
246
247
248static const u32 udma_tmlimin = 20;
249static const u32 udma_tzahmin = 20;
250static const u32 udma_tenvmin = 20;
251static const u32 udma_tackmin = 20;
252static const u32 udma_tssmin = 50;
253
254/**
255 *
256 * Function: num_clocks_min
257 *
258 * Description:
259 * calculate number of SCLK cycles to meet minimum timing
260 */
261static unsigned short num_clocks_min(unsigned long tmin,
262 unsigned long fsclk)
263{
264 unsigned long tmp ;
265 unsigned short result;
266
267 tmp = tmin * (fsclk/1000/1000) / 1000;
268 result = (unsigned short)tmp;
269 if ((tmp*1000*1000) < (tmin*(fsclk/1000))) {
270 result++;
271 }
272
273 return result;
274}
275
276/**
277 * bfin_set_piomode - Initialize host controller PATA PIO timings
278 * @ap: Port whose timings we are configuring
279 * @adev: um
280 *
281 * Set PIO mode for device.
282 *
283 * LOCKING:
284 * None (inherited from caller).
285 */
286
287static void bfin_set_piomode(struct ata_port *ap, struct ata_device *adev)
288{
289 int mode = adev->pio_mode - XFER_PIO_0;
290 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
291 unsigned int fsclk = get_sclk();
292 unsigned short teoc_reg, t2_reg, teoc_pio;
293 unsigned short t4_reg, t2_pio, t1_reg;
294 unsigned short n0, n6, t6min = 5;
295
296 /* the most restrictive timing value is t6 and tc, the DIOW - data hold
297 * If one SCLK pulse is longer than this minimum value then register
298 * transfers cannot be supported at this frequency.
299 */
300 n6 = num_clocks_min(t6min, fsclk);
301 if (mode >= 0 && mode <= 4 && n6 >= 1) {
Bryan Wu9f24e822008-01-30 16:43:28 +0800302 dev_dbg(adev->link->ap->dev, "set piomode: mode=%d, fsclk=%ud\n", mode, fsclk);
Sonic Zhangd830d172007-08-21 13:12:31 +0800303 /* calculate the timing values for register transfers. */
304 while (mode > 0 && pio_fsclk[mode] > fsclk)
305 mode--;
306
307 /* DIOR/DIOW to end cycle time */
308 t2_reg = num_clocks_min(reg_t2min[mode], fsclk);
309 /* DIOR/DIOW asserted pulse width */
310 teoc_reg = num_clocks_min(reg_teocmin[mode], fsclk);
311 /* Cycle Time */
312 n0 = num_clocks_min(reg_t0min[mode], fsclk);
313
314 /* increase t2 until we meed the minimum cycle length */
315 if (t2_reg + teoc_reg < n0)
316 t2_reg = n0 - teoc_reg;
317
318 /* calculate the timing values for pio transfers. */
319
320 /* DIOR/DIOW to end cycle time */
321 t2_pio = num_clocks_min(pio_t2min[mode], fsclk);
322 /* DIOR/DIOW asserted pulse width */
323 teoc_pio = num_clocks_min(pio_teocmin[mode], fsclk);
324 /* Cycle Time */
325 n0 = num_clocks_min(pio_t0min[mode], fsclk);
326
327 /* increase t2 until we meed the minimum cycle length */
328 if (t2_pio + teoc_pio < n0)
329 t2_pio = n0 - teoc_pio;
330
331 /* Address valid to DIOR/DIORW */
332 t1_reg = num_clocks_min(pio_t1min[mode], fsclk);
333
334 /* DIOW data hold */
335 t4_reg = num_clocks_min(pio_t4min[mode], fsclk);
336
337 ATAPI_SET_REG_TIM_0(base, (teoc_reg<<8 | t2_reg));
338 ATAPI_SET_PIO_TIM_0(base, (t4_reg<<12 | t2_pio<<4 | t1_reg));
339 ATAPI_SET_PIO_TIM_1(base, teoc_pio);
340 if (mode > 2) {
341 ATAPI_SET_CONTROL(base,
342 ATAPI_GET_CONTROL(base) | IORDY_EN);
343 } else {
344 ATAPI_SET_CONTROL(base,
345 ATAPI_GET_CONTROL(base) & ~IORDY_EN);
346 }
347
348 /* Disable host ATAPI PIO interrupts */
349 ATAPI_SET_INT_MASK(base, ATAPI_GET_INT_MASK(base)
350 & ~(PIO_DONE_MASK | HOST_TERM_XFER_MASK));
351 SSYNC();
352 }
353}
354
355/**
356 * bfin_set_dmamode - Initialize host controller PATA DMA timings
357 * @ap: Port whose timings we are configuring
358 * @adev: um
Sonic Zhangd830d172007-08-21 13:12:31 +0800359 *
360 * Set UDMA mode for device.
361 *
362 * LOCKING:
363 * None (inherited from caller).
364 */
365
366static void bfin_set_dmamode(struct ata_port *ap, struct ata_device *adev)
367{
368 int mode;
369 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
370 unsigned long fsclk = get_sclk();
371 unsigned short tenv, tack, tcyc_tdvs, tdvs, tmli, tss, trp, tzah;
372 unsigned short tm, td, tkr, tkw, teoc, th;
373 unsigned short n0, nf, tfmin = 5;
374 unsigned short nmin, tcyc;
375
376 mode = adev->dma_mode - XFER_UDMA_0;
377 if (mode >= 0 && mode <= 5) {
Bryan Wu9f24e822008-01-30 16:43:28 +0800378 dev_dbg(adev->link->ap->dev, "set udmamode: mode=%d\n", mode);
Sonic Zhangd830d172007-08-21 13:12:31 +0800379 /* the most restrictive timing value is t6 and tc,
380 * the DIOW - data hold. If one SCLK pulse is longer
381 * than this minimum value then register
382 * transfers cannot be supported at this frequency.
383 */
384 while (mode > 0 && udma_fsclk[mode] > fsclk)
385 mode--;
386
387 nmin = num_clocks_min(udma_tmin[mode], fsclk);
388 if (nmin >= 1) {
389 /* calculate the timing values for Ultra DMA. */
390 tdvs = num_clocks_min(udma_tdvsmin[mode], fsclk);
391 tcyc = num_clocks_min(udma_tcycmin[mode], fsclk);
392 tcyc_tdvs = 2;
393
394 /* increase tcyc - tdvs (tcyc_tdvs) until we meed
395 * the minimum cycle length
396 */
397 if (tdvs + tcyc_tdvs < tcyc)
398 tcyc_tdvs = tcyc - tdvs;
399
400 /* Mow assign the values required for the timing
401 * registers
402 */
403 if (tcyc_tdvs < 2)
404 tcyc_tdvs = 2;
405
406 if (tdvs < 2)
407 tdvs = 2;
408
409 tack = num_clocks_min(udma_tackmin, fsclk);
410 tss = num_clocks_min(udma_tssmin, fsclk);
411 tmli = num_clocks_min(udma_tmlimin, fsclk);
412 tzah = num_clocks_min(udma_tzahmin, fsclk);
413 trp = num_clocks_min(udma_trpmin[mode], fsclk);
414 tenv = num_clocks_min(udma_tenvmin, fsclk);
415 if (tenv <= udma_tenvmax[mode]) {
416 ATAPI_SET_ULTRA_TIM_0(base, (tenv<<8 | tack));
417 ATAPI_SET_ULTRA_TIM_1(base,
418 (tcyc_tdvs<<8 | tdvs));
419 ATAPI_SET_ULTRA_TIM_2(base, (tmli<<8 | tss));
420 ATAPI_SET_ULTRA_TIM_3(base, (trp<<8 | tzah));
421
422 /* Enable host ATAPI Untra DMA interrupts */
423 ATAPI_SET_INT_MASK(base,
424 ATAPI_GET_INT_MASK(base)
425 | UDMAIN_DONE_MASK
426 | UDMAOUT_DONE_MASK
427 | UDMAIN_TERM_MASK
428 | UDMAOUT_TERM_MASK);
429 }
430 }
431 }
432
433 mode = adev->dma_mode - XFER_MW_DMA_0;
434 if (mode >= 0 && mode <= 2) {
Bryan Wu9f24e822008-01-30 16:43:28 +0800435 dev_dbg(adev->link->ap->dev, "set mdmamode: mode=%d\n", mode);
Sonic Zhangd830d172007-08-21 13:12:31 +0800436 /* the most restrictive timing value is tf, the DMACK to
437 * read data released. If one SCLK pulse is longer than
438 * this maximum value then the MDMA mode
439 * cannot be supported at this frequency.
440 */
441 while (mode > 0 && mdma_fsclk[mode] > fsclk)
442 mode--;
443
444 nf = num_clocks_min(tfmin, fsclk);
445 if (nf >= 1) {
446 /* calculate the timing values for Multi-word DMA. */
447
448 /* DIOR/DIOW asserted pulse width */
449 td = num_clocks_min(mdma_tdmin[mode], fsclk);
450
451 /* DIOR negated pulse width */
452 tkw = num_clocks_min(mdma_tkwmin[mode], fsclk);
453
454 /* Cycle Time */
455 n0 = num_clocks_min(mdma_t0min[mode], fsclk);
456
457 /* increase tk until we meed the minimum cycle length */
458 if (tkw + td < n0)
459 tkw = n0 - td;
460
461 /* DIOR negated pulse width - read */
462 tkr = num_clocks_min(mdma_tkrmin[mode], fsclk);
463 /* CS{1:0] valid to DIOR/DIOW */
464 tm = num_clocks_min(mdma_tmmin[mode], fsclk);
465 /* DIOR/DIOW to DMACK hold */
466 teoc = num_clocks_min(mdma_tjmin[mode], fsclk);
467 /* DIOW Data hold */
468 th = num_clocks_min(mdma_thmin[mode], fsclk);
469
470 ATAPI_SET_MULTI_TIM_0(base, (tm<<8 | td));
471 ATAPI_SET_MULTI_TIM_1(base, (tkr<<8 | tkw));
472 ATAPI_SET_MULTI_TIM_2(base, (teoc<<8 | th));
473
474 /* Enable host ATAPI Multi DMA interrupts */
475 ATAPI_SET_INT_MASK(base, ATAPI_GET_INT_MASK(base)
476 | MULTI_DONE_MASK | MULTI_TERM_MASK);
477 SSYNC();
478 }
479 }
480 return;
481}
482
483/**
484 *
485 * Function: wait_complete
486 *
487 * Description: Waits the interrupt from device
488 *
489 */
490static inline void wait_complete(void __iomem *base, unsigned short mask)
491{
492 unsigned short status;
493 unsigned int i = 0;
494
495#define PATA_BF54X_WAIT_TIMEOUT 10000
496
497 for (i = 0; i < PATA_BF54X_WAIT_TIMEOUT; i++) {
498 status = ATAPI_GET_INT_STATUS(base) & mask;
499 if (status)
500 break;
501 }
502
503 ATAPI_SET_INT_STATUS(base, mask);
504}
505
506/**
507 *
508 * Function: write_atapi_register
509 *
510 * Description: Writes to ATA Device Resgister
511 *
512 */
513
514static void write_atapi_register(void __iomem *base,
515 unsigned long ata_reg, unsigned short value)
516{
517 /* Program the ATA_DEV_TXBUF register with write data (to be
518 * written into the device).
519 */
520 ATAPI_SET_DEV_TXBUF(base, value);
521
522 /* Program the ATA_DEV_ADDR register with address of the
523 * device register (0x01 to 0x0F).
524 */
525 ATAPI_SET_DEV_ADDR(base, ata_reg);
526
527 /* Program the ATA_CTRL register with dir set to write (1)
528 */
529 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | XFER_DIR));
530
531 /* ensure PIO DMA is not set */
532 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~PIO_USE_DMA));
533
534 /* and start the transfer */
535 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | PIO_START));
536
537 /* Wait for the interrupt to indicate the end of the transfer.
538 * (We need to wait on and clear rhe ATA_DEV_INT interrupt status)
539 */
540 wait_complete(base, PIO_DONE_INT);
541}
542
543/**
544 *
545 * Function: read_atapi_register
546 *
547 *Description: Reads from ATA Device Resgister
548 *
549 */
550
551static unsigned short read_atapi_register(void __iomem *base,
552 unsigned long ata_reg)
553{
554 /* Program the ATA_DEV_ADDR register with address of the
555 * device register (0x01 to 0x0F).
556 */
557 ATAPI_SET_DEV_ADDR(base, ata_reg);
558
559 /* Program the ATA_CTRL register with dir set to read (0) and
560 */
561 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~XFER_DIR));
562
563 /* ensure PIO DMA is not set */
564 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~PIO_USE_DMA));
565
566 /* and start the transfer */
567 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | PIO_START));
568
569 /* Wait for the interrupt to indicate the end of the transfer.
570 * (PIO_DONE interrupt is set and it doesn't seem to matter
571 * that we don't clear it)
572 */
573 wait_complete(base, PIO_DONE_INT);
574
575 /* Read the ATA_DEV_RXBUF register with write data (to be
576 * written into the device).
577 */
578 return ATAPI_GET_DEV_RXBUF(base);
579}
580
581/**
582 *
583 * Function: write_atapi_register_data
584 *
585 * Description: Writes to ATA Device Resgister
586 *
587 */
588
589static void write_atapi_data(void __iomem *base,
590 int len, unsigned short *buf)
591{
592 int i;
593
594 /* Set transfer length to 1 */
595 ATAPI_SET_XFER_LEN(base, 1);
596
597 /* Program the ATA_DEV_ADDR register with address of the
598 * ATA_REG_DATA
599 */
600 ATAPI_SET_DEV_ADDR(base, ATA_REG_DATA);
601
602 /* Program the ATA_CTRL register with dir set to write (1)
603 */
604 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | XFER_DIR));
605
606 /* ensure PIO DMA is not set */
607 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~PIO_USE_DMA));
608
609 for (i = 0; i < len; i++) {
610 /* Program the ATA_DEV_TXBUF register with write data (to be
611 * written into the device).
612 */
613 ATAPI_SET_DEV_TXBUF(base, buf[i]);
614
615 /* and start the transfer */
616 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | PIO_START));
617
618 /* Wait for the interrupt to indicate the end of the transfer.
619 * (We need to wait on and clear rhe ATA_DEV_INT
620 * interrupt status)
621 */
622 wait_complete(base, PIO_DONE_INT);
623 }
624}
625
626/**
627 *
628 * Function: read_atapi_register_data
629 *
630 * Description: Reads from ATA Device Resgister
631 *
632 */
633
634static void read_atapi_data(void __iomem *base,
635 int len, unsigned short *buf)
636{
637 int i;
638
639 /* Set transfer length to 1 */
640 ATAPI_SET_XFER_LEN(base, 1);
641
642 /* Program the ATA_DEV_ADDR register with address of the
643 * ATA_REG_DATA
644 */
645 ATAPI_SET_DEV_ADDR(base, ATA_REG_DATA);
646
647 /* Program the ATA_CTRL register with dir set to read (0) and
648 */
649 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~XFER_DIR));
650
651 /* ensure PIO DMA is not set */
652 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~PIO_USE_DMA));
653
654 for (i = 0; i < len; i++) {
655 /* and start the transfer */
656 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | PIO_START));
657
658 /* Wait for the interrupt to indicate the end of the transfer.
659 * (PIO_DONE interrupt is set and it doesn't seem to matter
660 * that we don't clear it)
661 */
662 wait_complete(base, PIO_DONE_INT);
663
664 /* Read the ATA_DEV_RXBUF register with write data (to be
665 * written into the device).
666 */
667 buf[i] = ATAPI_GET_DEV_RXBUF(base);
668 }
669}
670
671/**
672 * bfin_tf_load - send taskfile registers to host controller
673 * @ap: Port to which output is sent
674 * @tf: ATA taskfile register set
675 *
Tejun Heo9363c382008-04-07 22:47:16 +0900676 * Note: Original code is ata_sff_tf_load().
Sonic Zhangd830d172007-08-21 13:12:31 +0800677 */
678
679static void bfin_tf_load(struct ata_port *ap, const struct ata_taskfile *tf)
680{
681 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
682 unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
683
684 if (tf->ctl != ap->last_ctl) {
685 write_atapi_register(base, ATA_REG_CTRL, tf->ctl);
686 ap->last_ctl = tf->ctl;
687 ata_wait_idle(ap);
688 }
689
690 if (is_addr) {
691 if (tf->flags & ATA_TFLAG_LBA48) {
692 write_atapi_register(base, ATA_REG_FEATURE,
693 tf->hob_feature);
694 write_atapi_register(base, ATA_REG_NSECT,
695 tf->hob_nsect);
696 write_atapi_register(base, ATA_REG_LBAL, tf->hob_lbal);
697 write_atapi_register(base, ATA_REG_LBAM, tf->hob_lbam);
698 write_atapi_register(base, ATA_REG_LBAH, tf->hob_lbah);
Sonic Zhangf9204112008-01-30 16:43:26 +0800699 dev_dbg(ap->dev, "hob: feat 0x%X nsect 0x%X, lba 0x%X "
Sonic Zhangd830d172007-08-21 13:12:31 +0800700 "0x%X 0x%X\n",
701 tf->hob_feature,
702 tf->hob_nsect,
703 tf->hob_lbal,
704 tf->hob_lbam,
705 tf->hob_lbah);
706 }
707
708 write_atapi_register(base, ATA_REG_FEATURE, tf->feature);
709 write_atapi_register(base, ATA_REG_NSECT, tf->nsect);
710 write_atapi_register(base, ATA_REG_LBAL, tf->lbal);
711 write_atapi_register(base, ATA_REG_LBAM, tf->lbam);
712 write_atapi_register(base, ATA_REG_LBAH, tf->lbah);
Sonic Zhangf9204112008-01-30 16:43:26 +0800713 dev_dbg(ap->dev, "feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
Sonic Zhangd830d172007-08-21 13:12:31 +0800714 tf->feature,
715 tf->nsect,
716 tf->lbal,
717 tf->lbam,
718 tf->lbah);
719 }
720
721 if (tf->flags & ATA_TFLAG_DEVICE) {
722 write_atapi_register(base, ATA_REG_DEVICE, tf->device);
Sonic Zhangf9204112008-01-30 16:43:26 +0800723 dev_dbg(ap->dev, "device 0x%X\n", tf->device);
Sonic Zhangd830d172007-08-21 13:12:31 +0800724 }
725
726 ata_wait_idle(ap);
727}
728
729/**
730 * bfin_check_status - Read device status reg & clear interrupt
731 * @ap: port where the device is
732 *
733 * Note: Original code is ata_check_status().
734 */
735
736static u8 bfin_check_status(struct ata_port *ap)
737{
738 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
739 return read_atapi_register(base, ATA_REG_STATUS);
740}
741
742/**
743 * bfin_tf_read - input device's ATA taskfile shadow registers
744 * @ap: Port from which input is read
745 * @tf: ATA taskfile register set for storing input
746 *
Tejun Heo9363c382008-04-07 22:47:16 +0900747 * Note: Original code is ata_sff_tf_read().
Sonic Zhangd830d172007-08-21 13:12:31 +0800748 */
749
750static void bfin_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
751{
752 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
753
754 tf->command = bfin_check_status(ap);
755 tf->feature = read_atapi_register(base, ATA_REG_ERR);
756 tf->nsect = read_atapi_register(base, ATA_REG_NSECT);
757 tf->lbal = read_atapi_register(base, ATA_REG_LBAL);
758 tf->lbam = read_atapi_register(base, ATA_REG_LBAM);
759 tf->lbah = read_atapi_register(base, ATA_REG_LBAH);
760 tf->device = read_atapi_register(base, ATA_REG_DEVICE);
761
762 if (tf->flags & ATA_TFLAG_LBA48) {
763 write_atapi_register(base, ATA_REG_CTRL, tf->ctl | ATA_HOB);
764 tf->hob_feature = read_atapi_register(base, ATA_REG_ERR);
765 tf->hob_nsect = read_atapi_register(base, ATA_REG_NSECT);
766 tf->hob_lbal = read_atapi_register(base, ATA_REG_LBAL);
767 tf->hob_lbam = read_atapi_register(base, ATA_REG_LBAM);
768 tf->hob_lbah = read_atapi_register(base, ATA_REG_LBAH);
769 }
770}
771
772/**
773 * bfin_exec_command - issue ATA command to host controller
774 * @ap: port to which command is being issued
775 * @tf: ATA taskfile register set
776 *
Tejun Heo9363c382008-04-07 22:47:16 +0900777 * Note: Original code is ata_sff_exec_command().
Sonic Zhangd830d172007-08-21 13:12:31 +0800778 */
779
780static void bfin_exec_command(struct ata_port *ap,
781 const struct ata_taskfile *tf)
782{
783 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
Sonic Zhangf9204112008-01-30 16:43:26 +0800784 dev_dbg(ap->dev, "ata%u: cmd 0x%X\n", ap->print_id, tf->command);
Sonic Zhangd830d172007-08-21 13:12:31 +0800785
786 write_atapi_register(base, ATA_REG_CMD, tf->command);
Tejun Heo9363c382008-04-07 22:47:16 +0900787 ata_sff_pause(ap);
Sonic Zhangd830d172007-08-21 13:12:31 +0800788}
789
790/**
791 * bfin_check_altstatus - Read device alternate status reg
792 * @ap: port where the device is
793 */
794
795static u8 bfin_check_altstatus(struct ata_port *ap)
796{
797 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
798 return read_atapi_register(base, ATA_REG_ALTSTATUS);
799}
800
801/**
Tejun Heo9363c382008-04-07 22:47:16 +0900802 * bfin_dev_select - Select device 0/1 on ATA bus
Sonic Zhangd830d172007-08-21 13:12:31 +0800803 * @ap: ATA channel to manipulate
804 * @device: ATA device (numbered from zero) to select
805 *
Tejun Heo9363c382008-04-07 22:47:16 +0900806 * Note: Original code is ata_sff_dev_select().
Sonic Zhangd830d172007-08-21 13:12:31 +0800807 */
808
Tejun Heo9363c382008-04-07 22:47:16 +0900809static void bfin_dev_select(struct ata_port *ap, unsigned int device)
Sonic Zhangd830d172007-08-21 13:12:31 +0800810{
811 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
812 u8 tmp;
813
814 if (device == 0)
815 tmp = ATA_DEVICE_OBS;
816 else
817 tmp = ATA_DEVICE_OBS | ATA_DEV1;
818
819 write_atapi_register(base, ATA_REG_DEVICE, tmp);
Tejun Heo9363c382008-04-07 22:47:16 +0900820 ata_sff_pause(ap);
Sonic Zhangd830d172007-08-21 13:12:31 +0800821}
822
823/**
824 * bfin_bmdma_setup - Set up IDE DMA transaction
825 * @qc: Info associated with this ATA transaction.
826 *
827 * Note: Original code is ata_bmdma_setup().
828 */
829
830static void bfin_bmdma_setup(struct ata_queued_cmd *qc)
831{
832 unsigned short config = WDSIZE_16;
833 struct scatterlist *sg;
Tejun Heoff2aeb12007-12-05 16:43:11 +0900834 unsigned int si;
Sonic Zhangd830d172007-08-21 13:12:31 +0800835
Sonic Zhangf9204112008-01-30 16:43:26 +0800836 dev_dbg(qc->ap->dev, "in atapi dma setup\n");
Sonic Zhangd830d172007-08-21 13:12:31 +0800837 /* Program the ATA_CTRL register with dir */
838 if (qc->tf.flags & ATA_TFLAG_WRITE) {
839 /* fill the ATAPI DMA controller */
840 set_dma_config(CH_ATAPI_TX, config);
841 set_dma_x_modify(CH_ATAPI_TX, 2);
Tejun Heoff2aeb12007-12-05 16:43:11 +0900842 for_each_sg(qc->sg, sg, qc->n_elem, si) {
Sonic Zhangd830d172007-08-21 13:12:31 +0800843 set_dma_start_addr(CH_ATAPI_TX, sg_dma_address(sg));
844 set_dma_x_count(CH_ATAPI_TX, sg_dma_len(sg) >> 1);
845 }
846 } else {
847 config |= WNR;
848 /* fill the ATAPI DMA controller */
849 set_dma_config(CH_ATAPI_RX, config);
850 set_dma_x_modify(CH_ATAPI_RX, 2);
Tejun Heoff2aeb12007-12-05 16:43:11 +0900851 for_each_sg(qc->sg, sg, qc->n_elem, si) {
Sonic Zhangd830d172007-08-21 13:12:31 +0800852 set_dma_start_addr(CH_ATAPI_RX, sg_dma_address(sg));
853 set_dma_x_count(CH_ATAPI_RX, sg_dma_len(sg) >> 1);
854 }
855 }
856}
857
858/**
859 * bfin_bmdma_start - Start an IDE DMA transaction
860 * @qc: Info associated with this ATA transaction.
861 *
862 * Note: Original code is ata_bmdma_start().
863 */
864
865static void bfin_bmdma_start(struct ata_queued_cmd *qc)
866{
867 struct ata_port *ap = qc->ap;
868 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
869 struct scatterlist *sg;
Tejun Heoff2aeb12007-12-05 16:43:11 +0900870 unsigned int si;
Sonic Zhangd830d172007-08-21 13:12:31 +0800871
Sonic Zhangf9204112008-01-30 16:43:26 +0800872 dev_dbg(qc->ap->dev, "in atapi dma start\n");
Sonic Zhangd830d172007-08-21 13:12:31 +0800873 if (!(ap->udma_mask || ap->mwdma_mask))
874 return;
875
876 /* start ATAPI DMA controller*/
877 if (qc->tf.flags & ATA_TFLAG_WRITE) {
878 /*
879 * On blackfin arch, uncacheable memory is not
880 * allocated with flag GFP_DMA. DMA buffer from
881 * common kenel code should be flushed if WB
882 * data cache is enabled. Otherwise, this loop
883 * is an empty loop and optimized out.
884 */
Tejun Heoff2aeb12007-12-05 16:43:11 +0900885 for_each_sg(qc->sg, sg, qc->n_elem, si) {
Sonic Zhangd830d172007-08-21 13:12:31 +0800886 flush_dcache_range(sg_dma_address(sg),
887 sg_dma_address(sg) + sg_dma_len(sg));
888 }
889 enable_dma(CH_ATAPI_TX);
Sonic Zhangf9204112008-01-30 16:43:26 +0800890 dev_dbg(qc->ap->dev, "enable udma write\n");
Sonic Zhangd830d172007-08-21 13:12:31 +0800891
892 /* Send ATA DMA write command */
893 bfin_exec_command(ap, &qc->tf);
894
895 /* set ATA DMA write direction */
896 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base)
897 | XFER_DIR));
898 } else {
899 enable_dma(CH_ATAPI_RX);
Sonic Zhangf9204112008-01-30 16:43:26 +0800900 dev_dbg(qc->ap->dev, "enable udma read\n");
Sonic Zhangd830d172007-08-21 13:12:31 +0800901
902 /* Send ATA DMA read command */
903 bfin_exec_command(ap, &qc->tf);
904
905 /* set ATA DMA read direction */
906 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base)
907 & ~XFER_DIR));
908 }
909
910 /* Reset all transfer count */
911 ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) | TFRCNT_RST);
912
Sonic Zhangb6e7b442008-05-12 12:12:16 +0800913 /* Set ATAPI state machine contorl in terminate sequence */
914 ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) | END_ON_TERM);
915
916 /* Set transfer length to buffer len */
Tejun Heoff2aeb12007-12-05 16:43:11 +0900917 for_each_sg(qc->sg, sg, qc->n_elem, si) {
Sonic Zhangd830d172007-08-21 13:12:31 +0800918 ATAPI_SET_XFER_LEN(base, (sg_dma_len(sg) >> 1));
919 }
920
921 /* Enable ATA DMA operation*/
922 if (ap->udma_mask)
923 ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base)
924 | ULTRA_START);
925 else
926 ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base)
927 | MULTI_START);
928}
929
930/**
931 * bfin_bmdma_stop - Stop IDE DMA transfer
932 * @qc: Command we are ending DMA for
933 */
934
935static void bfin_bmdma_stop(struct ata_queued_cmd *qc)
936{
937 struct ata_port *ap = qc->ap;
938 struct scatterlist *sg;
Tejun Heoff2aeb12007-12-05 16:43:11 +0900939 unsigned int si;
Sonic Zhangd830d172007-08-21 13:12:31 +0800940
Sonic Zhangf9204112008-01-30 16:43:26 +0800941 dev_dbg(qc->ap->dev, "in atapi dma stop\n");
Sonic Zhangd830d172007-08-21 13:12:31 +0800942 if (!(ap->udma_mask || ap->mwdma_mask))
943 return;
944
945 /* stop ATAPI DMA controller*/
946 if (qc->tf.flags & ATA_TFLAG_WRITE)
947 disable_dma(CH_ATAPI_TX);
948 else {
949 disable_dma(CH_ATAPI_RX);
950 if (ap->hsm_task_state & HSM_ST_LAST) {
951 /*
952 * On blackfin arch, uncacheable memory is not
953 * allocated with flag GFP_DMA. DMA buffer from
954 * common kenel code should be invalidated if
955 * data cache is enabled. Otherwise, this loop
956 * is an empty loop and optimized out.
957 */
Tejun Heoff2aeb12007-12-05 16:43:11 +0900958 for_each_sg(qc->sg, sg, qc->n_elem, si) {
Sonic Zhangd830d172007-08-21 13:12:31 +0800959 invalidate_dcache_range(
960 sg_dma_address(sg),
961 sg_dma_address(sg)
962 + sg_dma_len(sg));
963 }
964 }
965 }
966}
967
968/**
969 * bfin_devchk - PATA device presence detection
970 * @ap: ATA channel to examine
971 * @device: Device to examine (starting at zero)
972 *
973 * Note: Original code is ata_devchk().
974 */
975
976static unsigned int bfin_devchk(struct ata_port *ap,
977 unsigned int device)
978{
979 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
980 u8 nsect, lbal;
981
Tejun Heo9363c382008-04-07 22:47:16 +0900982 bfin_dev_select(ap, device);
Sonic Zhangd830d172007-08-21 13:12:31 +0800983
984 write_atapi_register(base, ATA_REG_NSECT, 0x55);
985 write_atapi_register(base, ATA_REG_LBAL, 0xaa);
986
987 write_atapi_register(base, ATA_REG_NSECT, 0xaa);
988 write_atapi_register(base, ATA_REG_LBAL, 0x55);
989
990 write_atapi_register(base, ATA_REG_NSECT, 0x55);
991 write_atapi_register(base, ATA_REG_LBAL, 0xaa);
992
993 nsect = read_atapi_register(base, ATA_REG_NSECT);
994 lbal = read_atapi_register(base, ATA_REG_LBAL);
995
996 if ((nsect == 0x55) && (lbal == 0xaa))
997 return 1; /* we found a device */
998
999 return 0; /* nothing found */
1000}
1001
1002/**
1003 * bfin_bus_post_reset - PATA device post reset
1004 *
1005 * Note: Original code is ata_bus_post_reset().
1006 */
1007
1008static void bfin_bus_post_reset(struct ata_port *ap, unsigned int devmask)
1009{
1010 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
1011 unsigned int dev0 = devmask & (1 << 0);
1012 unsigned int dev1 = devmask & (1 << 1);
Tejun Heo341c2c92008-05-20 02:17:51 +09001013 unsigned long deadline;
Sonic Zhangd830d172007-08-21 13:12:31 +08001014
1015 /* if device 0 was found in ata_devchk, wait for its
1016 * BSY bit to clear
1017 */
1018 if (dev0)
Tejun Heo9363c382008-04-07 22:47:16 +09001019 ata_sff_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
Sonic Zhangd830d172007-08-21 13:12:31 +08001020
1021 /* if device 1 was found in ata_devchk, wait for
1022 * register access, then wait for BSY to clear
1023 */
Tejun Heo341c2c92008-05-20 02:17:51 +09001024 deadline = ata_deadline(jiffies, ATA_TMOUT_BOOT);
Sonic Zhangd830d172007-08-21 13:12:31 +08001025 while (dev1) {
1026 u8 nsect, lbal;
1027
Tejun Heo9363c382008-04-07 22:47:16 +09001028 bfin_dev_select(ap, 1);
Sonic Zhangd830d172007-08-21 13:12:31 +08001029 nsect = read_atapi_register(base, ATA_REG_NSECT);
1030 lbal = read_atapi_register(base, ATA_REG_LBAL);
1031 if ((nsect == 1) && (lbal == 1))
1032 break;
Tejun Heo341c2c92008-05-20 02:17:51 +09001033 if (time_after(jiffies, deadline)) {
Sonic Zhangd830d172007-08-21 13:12:31 +08001034 dev1 = 0;
1035 break;
1036 }
1037 msleep(50); /* give drive a breather */
1038 }
1039 if (dev1)
Tejun Heo9363c382008-04-07 22:47:16 +09001040 ata_sff_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
Sonic Zhangd830d172007-08-21 13:12:31 +08001041
1042 /* is all this really necessary? */
Tejun Heo9363c382008-04-07 22:47:16 +09001043 bfin_dev_select(ap, 0);
Sonic Zhangd830d172007-08-21 13:12:31 +08001044 if (dev1)
Tejun Heo9363c382008-04-07 22:47:16 +09001045 bfin_dev_select(ap, 1);
Sonic Zhangd830d172007-08-21 13:12:31 +08001046 if (dev0)
Tejun Heo9363c382008-04-07 22:47:16 +09001047 bfin_dev_select(ap, 0);
Sonic Zhangd830d172007-08-21 13:12:31 +08001048}
1049
1050/**
1051 * bfin_bus_softreset - PATA device software reset
1052 *
1053 * Note: Original code is ata_bus_softreset().
1054 */
1055
1056static unsigned int bfin_bus_softreset(struct ata_port *ap,
1057 unsigned int devmask)
1058{
1059 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
1060
1061 /* software reset. causes dev0 to be selected */
1062 write_atapi_register(base, ATA_REG_CTRL, ap->ctl);
1063 udelay(20);
1064 write_atapi_register(base, ATA_REG_CTRL, ap->ctl | ATA_SRST);
1065 udelay(20);
1066 write_atapi_register(base, ATA_REG_CTRL, ap->ctl);
1067
1068 /* spec mandates ">= 2ms" before checking status.
1069 * We wait 150ms, because that was the magic delay used for
1070 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
1071 * between when the ATA command register is written, and then
1072 * status is checked. Because waiting for "a while" before
1073 * checking status is fine, post SRST, we perform this magic
1074 * delay here as well.
1075 *
1076 * Old drivers/ide uses the 2mS rule and then waits for ready
1077 */
1078 msleep(150);
1079
1080 /* Before we perform post reset processing we want to see if
1081 * the bus shows 0xFF because the odd clown forgets the D7
1082 * pulldown resistor.
1083 */
1084 if (bfin_check_status(ap) == 0xFF)
1085 return 0;
1086
1087 bfin_bus_post_reset(ap, devmask);
1088
1089 return 0;
1090}
1091
1092/**
Tejun Heo9363c382008-04-07 22:47:16 +09001093 * bfin_softreset - reset host port via ATA SRST
Sonic Zhangd830d172007-08-21 13:12:31 +08001094 * @ap: port to reset
1095 * @classes: resulting classes of attached devices
1096 *
Tejun Heo9363c382008-04-07 22:47:16 +09001097 * Note: Original code is ata_sff_softreset().
Sonic Zhangd830d172007-08-21 13:12:31 +08001098 */
1099
Tejun Heo9363c382008-04-07 22:47:16 +09001100static int bfin_softreset(struct ata_link *link, unsigned int *classes,
1101 unsigned long deadline)
Sonic Zhangd830d172007-08-21 13:12:31 +08001102{
Sonic Zhang858c9c402007-10-16 16:43:27 +08001103 struct ata_port *ap = link->ap;
Sonic Zhangd830d172007-08-21 13:12:31 +08001104 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
1105 unsigned int devmask = 0, err_mask;
1106 u8 err;
1107
Sonic Zhangd830d172007-08-21 13:12:31 +08001108 /* determine if device 0/1 are present */
1109 if (bfin_devchk(ap, 0))
1110 devmask |= (1 << 0);
1111 if (slave_possible && bfin_devchk(ap, 1))
1112 devmask |= (1 << 1);
1113
1114 /* select device 0 again */
Tejun Heo9363c382008-04-07 22:47:16 +09001115 bfin_dev_select(ap, 0);
Sonic Zhangd830d172007-08-21 13:12:31 +08001116
1117 /* issue bus reset */
1118 err_mask = bfin_bus_softreset(ap, devmask);
1119 if (err_mask) {
1120 ata_port_printk(ap, KERN_ERR, "SRST failed (err_mask=0x%x)\n",
1121 err_mask);
1122 return -EIO;
1123 }
1124
1125 /* determine by signature whether we have ATA or ATAPI devices */
Tejun Heo9363c382008-04-07 22:47:16 +09001126 classes[0] = ata_sff_dev_classify(&ap->link.device[0],
Sonic Zhang858c9c402007-10-16 16:43:27 +08001127 devmask & (1 << 0), &err);
Sonic Zhangd830d172007-08-21 13:12:31 +08001128 if (slave_possible && err != 0x81)
Tejun Heo9363c382008-04-07 22:47:16 +09001129 classes[1] = ata_sff_dev_classify(&ap->link.device[1],
Sonic Zhang858c9c402007-10-16 16:43:27 +08001130 devmask & (1 << 1), &err);
Sonic Zhangd830d172007-08-21 13:12:31 +08001131
Sonic Zhangd830d172007-08-21 13:12:31 +08001132 return 0;
1133}
1134
1135/**
1136 * bfin_bmdma_status - Read IDE DMA status
1137 * @ap: Port associated with this ATA transaction.
1138 */
1139
1140static unsigned char bfin_bmdma_status(struct ata_port *ap)
1141{
1142 unsigned char host_stat = 0;
1143 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
1144 unsigned short int_status = ATAPI_GET_INT_STATUS(base);
1145
Sonic Zhang30d849c2008-01-30 16:43:27 +08001146 if (ATAPI_GET_STATUS(base) & (MULTI_XFER_ON|ULTRA_XFER_ON))
sonic zhangdc86f6d2007-11-26 17:50:56 +08001147 host_stat |= ATA_DMA_ACTIVE;
Sonic Zhang30d849c2008-01-30 16:43:27 +08001148 if (int_status & (MULTI_DONE_INT|UDMAIN_DONE_INT|UDMAOUT_DONE_INT|
1149 ATAPI_DEV_INT))
sonic zhangdc86f6d2007-11-26 17:50:56 +08001150 host_stat |= ATA_DMA_INTR;
Sonic Zhang30d849c2008-01-30 16:43:27 +08001151 if (int_status & (MULTI_TERM_INT|UDMAIN_TERM_INT|UDMAOUT_TERM_INT))
1152 host_stat |= ATA_DMA_ERR|ATA_DMA_INTR;
Sonic Zhangd830d172007-08-21 13:12:31 +08001153
Sonic Zhangf9204112008-01-30 16:43:26 +08001154 dev_dbg(ap->dev, "ATAPI: host_stat=0x%x\n", host_stat);
1155
Sonic Zhangd830d172007-08-21 13:12:31 +08001156 return host_stat;
1157}
1158
1159/**
1160 * bfin_data_xfer - Transfer data by PIO
1161 * @adev: device for this I/O
1162 * @buf: data buffer
1163 * @buflen: buffer length
1164 * @write_data: read/write
1165 *
Tejun Heo9363c382008-04-07 22:47:16 +09001166 * Note: Original code is ata_sff_data_xfer().
Sonic Zhangd830d172007-08-21 13:12:31 +08001167 */
1168
Tejun Heo55dba312007-12-05 16:43:07 +09001169static unsigned int bfin_data_xfer(struct ata_device *dev, unsigned char *buf,
1170 unsigned int buflen, int rw)
Sonic Zhangd830d172007-08-21 13:12:31 +08001171{
Tejun Heo55dba312007-12-05 16:43:07 +09001172 struct ata_port *ap = dev->link->ap;
Sonic Zhangd830d172007-08-21 13:12:31 +08001173 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
Tejun Heo55dba312007-12-05 16:43:07 +09001174 unsigned int words = buflen >> 1;
1175 unsigned short *buf16 = (u16 *)buf;
Sonic Zhangd830d172007-08-21 13:12:31 +08001176
1177 /* Transfer multiple of 2 bytes */
Tejun Heo55dba312007-12-05 16:43:07 +09001178 if (rw == READ)
Sonic Zhangd830d172007-08-21 13:12:31 +08001179 read_atapi_data(base, words, buf16);
Tejun Heo55dba312007-12-05 16:43:07 +09001180 else
1181 write_atapi_data(base, words, buf16);
Sonic Zhangd830d172007-08-21 13:12:31 +08001182
1183 /* Transfer trailing 1 byte, if any. */
1184 if (unlikely(buflen & 0x01)) {
1185 unsigned short align_buf[1] = { 0 };
1186 unsigned char *trailing_buf = buf + buflen - 1;
1187
Tejun Heo55dba312007-12-05 16:43:07 +09001188 if (rw == READ) {
Sonic Zhangd830d172007-08-21 13:12:31 +08001189 read_atapi_data(base, 1, align_buf);
1190 memcpy(trailing_buf, align_buf, 1);
Tejun Heo55dba312007-12-05 16:43:07 +09001191 } else {
1192 memcpy(align_buf, trailing_buf, 1);
1193 write_atapi_data(base, 1, align_buf);
Sonic Zhangd830d172007-08-21 13:12:31 +08001194 }
Tejun Heo55dba312007-12-05 16:43:07 +09001195 words++;
Sonic Zhangd830d172007-08-21 13:12:31 +08001196 }
Tejun Heo55dba312007-12-05 16:43:07 +09001197
1198 return words << 1;
Sonic Zhangd830d172007-08-21 13:12:31 +08001199}
1200
1201/**
1202 * bfin_irq_clear - Clear ATAPI interrupt.
1203 * @ap: Port associated with this ATA transaction.
1204 *
Tejun Heo9363c382008-04-07 22:47:16 +09001205 * Note: Original code is ata_sff_irq_clear().
Sonic Zhangd830d172007-08-21 13:12:31 +08001206 */
1207
1208static void bfin_irq_clear(struct ata_port *ap)
1209{
1210 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
1211
Sonic Zhangf9204112008-01-30 16:43:26 +08001212 dev_dbg(ap->dev, "in atapi irq clear\n");
Sonic Zhang858c9c402007-10-16 16:43:27 +08001213 ATAPI_SET_INT_STATUS(base, ATAPI_GET_INT_STATUS(base)|ATAPI_DEV_INT
1214 | MULTI_DONE_INT | UDMAIN_DONE_INT | UDMAOUT_DONE_INT
1215 | MULTI_TERM_INT | UDMAIN_TERM_INT | UDMAOUT_TERM_INT);
Sonic Zhangd830d172007-08-21 13:12:31 +08001216}
1217
1218/**
1219 * bfin_irq_on - Enable interrupts on a port.
1220 * @ap: Port on which interrupts are enabled.
1221 *
Tejun Heo9363c382008-04-07 22:47:16 +09001222 * Note: Original code is ata_sff_irq_on().
Sonic Zhangd830d172007-08-21 13:12:31 +08001223 */
1224
1225static unsigned char bfin_irq_on(struct ata_port *ap)
1226{
1227 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
1228 u8 tmp;
1229
Sonic Zhangf9204112008-01-30 16:43:26 +08001230 dev_dbg(ap->dev, "in atapi irq on\n");
Sonic Zhangd830d172007-08-21 13:12:31 +08001231 ap->ctl &= ~ATA_NIEN;
1232 ap->last_ctl = ap->ctl;
1233
1234 write_atapi_register(base, ATA_REG_CTRL, ap->ctl);
1235 tmp = ata_wait_idle(ap);
1236
1237 bfin_irq_clear(ap);
1238
1239 return tmp;
1240}
1241
1242/**
Tejun Heo9363c382008-04-07 22:47:16 +09001243 * bfin_freeze - Freeze DMA controller port
Sonic Zhangd830d172007-08-21 13:12:31 +08001244 * @ap: port to freeze
1245 *
Tejun Heo9363c382008-04-07 22:47:16 +09001246 * Note: Original code is ata_sff_freeze().
Sonic Zhangd830d172007-08-21 13:12:31 +08001247 */
1248
Tejun Heo9363c382008-04-07 22:47:16 +09001249static void bfin_freeze(struct ata_port *ap)
Sonic Zhangd830d172007-08-21 13:12:31 +08001250{
1251 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
1252
Sonic Zhangf9204112008-01-30 16:43:26 +08001253 dev_dbg(ap->dev, "in atapi dma freeze\n");
Sonic Zhangd830d172007-08-21 13:12:31 +08001254 ap->ctl |= ATA_NIEN;
1255 ap->last_ctl = ap->ctl;
1256
1257 write_atapi_register(base, ATA_REG_CTRL, ap->ctl);
1258
1259 /* Under certain circumstances, some controllers raise IRQ on
1260 * ATA_NIEN manipulation. Also, many controllers fail to mask
1261 * previously pending IRQ on ATA_NIEN assertion. Clear it.
1262 */
Tejun Heo5682ed32008-04-07 22:47:16 +09001263 ap->ops->sff_check_status(ap);
Sonic Zhangd830d172007-08-21 13:12:31 +08001264
1265 bfin_irq_clear(ap);
1266}
1267
1268/**
Tejun Heo9363c382008-04-07 22:47:16 +09001269 * bfin_thaw - Thaw DMA controller port
Sonic Zhangd830d172007-08-21 13:12:31 +08001270 * @ap: port to thaw
1271 *
Tejun Heo9363c382008-04-07 22:47:16 +09001272 * Note: Original code is ata_sff_thaw().
Sonic Zhangd830d172007-08-21 13:12:31 +08001273 */
1274
Tejun Heo9363c382008-04-07 22:47:16 +09001275void bfin_thaw(struct ata_port *ap)
Sonic Zhangd830d172007-08-21 13:12:31 +08001276{
Sonic Zhang65c0d4e2008-04-25 17:19:25 +08001277 dev_dbg(ap->dev, "in atapi dma thaw\n");
Sonic Zhangd830d172007-08-21 13:12:31 +08001278 bfin_check_status(ap);
Sonic Zhangd830d172007-08-21 13:12:31 +08001279 bfin_irq_on(ap);
1280}
1281
1282/**
Tejun Heo9363c382008-04-07 22:47:16 +09001283 * bfin_postreset - standard postreset callback
Sonic Zhangd830d172007-08-21 13:12:31 +08001284 * @ap: the target ata_port
1285 * @classes: classes of attached devices
1286 *
Tejun Heo9363c382008-04-07 22:47:16 +09001287 * Note: Original code is ata_sff_postreset().
Sonic Zhangd830d172007-08-21 13:12:31 +08001288 */
1289
Tejun Heo9363c382008-04-07 22:47:16 +09001290static void bfin_postreset(struct ata_link *link, unsigned int *classes)
Sonic Zhangd830d172007-08-21 13:12:31 +08001291{
Sonic Zhang858c9c402007-10-16 16:43:27 +08001292 struct ata_port *ap = link->ap;
Sonic Zhangd830d172007-08-21 13:12:31 +08001293 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
1294
1295 /* re-enable interrupts */
1296 bfin_irq_on(ap);
1297
1298 /* is double-select really necessary? */
1299 if (classes[0] != ATA_DEV_NONE)
Tejun Heo9363c382008-04-07 22:47:16 +09001300 bfin_dev_select(ap, 1);
Sonic Zhangd830d172007-08-21 13:12:31 +08001301 if (classes[1] != ATA_DEV_NONE)
Tejun Heo9363c382008-04-07 22:47:16 +09001302 bfin_dev_select(ap, 0);
Sonic Zhangd830d172007-08-21 13:12:31 +08001303
1304 /* bail out if no device is present */
1305 if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
1306 return;
1307 }
1308
1309 /* set up device control */
1310 write_atapi_register(base, ATA_REG_CTRL, ap->ctl);
1311}
1312
Sonic Zhangd830d172007-08-21 13:12:31 +08001313static void bfin_port_stop(struct ata_port *ap)
1314{
Sonic Zhangf9204112008-01-30 16:43:26 +08001315 dev_dbg(ap->dev, "in atapi port stop\n");
Sonic Zhangd830d172007-08-21 13:12:31 +08001316 if (ap->udma_mask != 0 || ap->mwdma_mask != 0) {
1317 free_dma(CH_ATAPI_RX);
1318 free_dma(CH_ATAPI_TX);
1319 }
1320}
1321
1322static int bfin_port_start(struct ata_port *ap)
1323{
Sonic Zhangf9204112008-01-30 16:43:26 +08001324 dev_dbg(ap->dev, "in atapi port start\n");
Sonic Zhangd830d172007-08-21 13:12:31 +08001325 if (!(ap->udma_mask || ap->mwdma_mask))
1326 return 0;
1327
1328 if (request_dma(CH_ATAPI_RX, "BFIN ATAPI RX DMA") >= 0) {
1329 if (request_dma(CH_ATAPI_TX,
1330 "BFIN ATAPI TX DMA") >= 0)
1331 return 0;
1332
1333 free_dma(CH_ATAPI_RX);
1334 }
1335
1336 ap->udma_mask = 0;
1337 ap->mwdma_mask = 0;
1338 dev_err(ap->dev, "Unable to request ATAPI DMA!"
1339 " Continue in PIO mode.\n");
1340
1341 return 0;
1342}
1343
Sonic Zhang65c0d4e2008-04-25 17:19:25 +08001344static unsigned int bfin_ata_host_intr(struct ata_port *ap,
1345 struct ata_queued_cmd *qc)
1346{
1347 struct ata_eh_info *ehi = &ap->link.eh_info;
1348 u8 status, host_stat = 0;
1349
1350 VPRINTK("ata%u: protocol %d task_state %d\n",
1351 ap->print_id, qc->tf.protocol, ap->hsm_task_state);
1352
1353 /* Check whether we are expecting interrupt in this state */
1354 switch (ap->hsm_task_state) {
1355 case HSM_ST_FIRST:
1356 /* Some pre-ATAPI-4 devices assert INTRQ
1357 * at this state when ready to receive CDB.
1358 */
1359
1360 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
1361 * The flag was turned on only for atapi devices.
1362 * No need to check is_atapi_taskfile(&qc->tf) again.
1363 */
1364 if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
1365 goto idle_irq;
1366 break;
1367 case HSM_ST_LAST:
1368 if (qc->tf.protocol == ATA_PROT_DMA ||
1369 qc->tf.protocol == ATAPI_PROT_DMA) {
1370 /* check status of DMA engine */
1371 host_stat = ap->ops->bmdma_status(ap);
1372 VPRINTK("ata%u: host_stat 0x%X\n",
1373 ap->print_id, host_stat);
1374
1375 /* if it's not our irq... */
1376 if (!(host_stat & ATA_DMA_INTR))
1377 goto idle_irq;
1378
1379 /* before we do anything else, clear DMA-Start bit */
1380 ap->ops->bmdma_stop(qc);
1381
1382 if (unlikely(host_stat & ATA_DMA_ERR)) {
1383 /* error when transfering data to/from memory */
1384 qc->err_mask |= AC_ERR_HOST_BUS;
1385 ap->hsm_task_state = HSM_ST_ERR;
1386 }
1387 }
1388 break;
1389 case HSM_ST:
1390 break;
1391 default:
1392 goto idle_irq;
1393 }
1394
1395 /* check altstatus */
1396 status = ap->ops->sff_check_altstatus(ap);
1397 if (status & ATA_BUSY)
1398 goto busy_ata;
1399
1400 /* check main status, clearing INTRQ */
1401 status = ap->ops->sff_check_status(ap);
1402 if (unlikely(status & ATA_BUSY))
1403 goto busy_ata;
1404
1405 /* ack bmdma irq events */
1406 ap->ops->sff_irq_clear(ap);
1407
1408 ata_sff_hsm_move(ap, qc, status, 0);
1409
1410 if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA ||
1411 qc->tf.protocol == ATAPI_PROT_DMA))
1412 ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat);
1413
1414busy_ata:
1415 return 1; /* irq handled */
1416
1417idle_irq:
1418 ap->stats.idle_irq++;
1419
1420#ifdef ATA_IRQ_TRAP
1421 if ((ap->stats.idle_irq % 1000) == 0) {
1422 ap->ops->irq_ack(ap, 0); /* debug trap */
1423 ata_port_printk(ap, KERN_WARNING, "irq trap\n");
1424 return 1;
1425 }
1426#endif
1427 return 0; /* irq not handled */
1428}
1429
1430static irqreturn_t bfin_ata_interrupt(int irq, void *dev_instance)
1431{
1432 struct ata_host *host = dev_instance;
1433 unsigned int i;
1434 unsigned int handled = 0;
1435 unsigned long flags;
1436
1437 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
1438 spin_lock_irqsave(&host->lock, flags);
1439
1440 for (i = 0; i < host->n_ports; i++) {
1441 struct ata_port *ap;
1442
1443 ap = host->ports[i];
1444 if (ap &&
1445 !(ap->flags & ATA_FLAG_DISABLED)) {
1446 struct ata_queued_cmd *qc;
1447
1448 qc = ata_qc_from_tag(ap, ap->link.active_tag);
1449 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) &&
1450 (qc->flags & ATA_QCFLAG_ACTIVE))
1451 handled |= bfin_ata_host_intr(ap, qc);
1452 }
1453 }
1454
1455 spin_unlock_irqrestore(&host->lock, flags);
1456
1457 return IRQ_RETVAL(handled);
1458}
1459
1460
Sonic Zhangd830d172007-08-21 13:12:31 +08001461static struct scsi_host_template bfin_sht = {
Tejun Heo68d1d072008-03-25 12:22:49 +09001462 ATA_BASE_SHT(DRV_NAME),
Sonic Zhangd830d172007-08-21 13:12:31 +08001463 .sg_tablesize = SG_NONE,
Sonic Zhangd830d172007-08-21 13:12:31 +08001464 .dma_boundary = ATA_DMA_BOUNDARY,
Sonic Zhangd830d172007-08-21 13:12:31 +08001465};
1466
Sonic Zhang65c0d4e2008-04-25 17:19:25 +08001467static struct ata_port_operations bfin_pata_ops = {
Tejun Heo029cfd62008-03-25 12:22:49 +09001468 .inherits = &ata_sff_port_ops,
1469
Sonic Zhangd830d172007-08-21 13:12:31 +08001470 .set_piomode = bfin_set_piomode,
1471 .set_dmamode = bfin_set_dmamode,
1472
Tejun Heo5682ed32008-04-07 22:47:16 +09001473 .sff_tf_load = bfin_tf_load,
1474 .sff_tf_read = bfin_tf_read,
1475 .sff_exec_command = bfin_exec_command,
1476 .sff_check_status = bfin_check_status,
1477 .sff_check_altstatus = bfin_check_altstatus,
1478 .sff_dev_select = bfin_dev_select,
Sonic Zhangd830d172007-08-21 13:12:31 +08001479
1480 .bmdma_setup = bfin_bmdma_setup,
1481 .bmdma_start = bfin_bmdma_start,
1482 .bmdma_stop = bfin_bmdma_stop,
1483 .bmdma_status = bfin_bmdma_status,
Tejun Heo5682ed32008-04-07 22:47:16 +09001484 .sff_data_xfer = bfin_data_xfer,
Sonic Zhangd830d172007-08-21 13:12:31 +08001485
1486 .qc_prep = ata_noop_qc_prep,
Sonic Zhangd830d172007-08-21 13:12:31 +08001487
Tejun Heo9363c382008-04-07 22:47:16 +09001488 .freeze = bfin_freeze,
1489 .thaw = bfin_thaw,
1490 .softreset = bfin_softreset,
1491 .postreset = bfin_postreset,
Sonic Zhangd830d172007-08-21 13:12:31 +08001492
Tejun Heo5682ed32008-04-07 22:47:16 +09001493 .sff_irq_clear = bfin_irq_clear,
1494 .sff_irq_on = bfin_irq_on,
Sonic Zhangd830d172007-08-21 13:12:31 +08001495
1496 .port_start = bfin_port_start,
1497 .port_stop = bfin_port_stop,
1498};
1499
1500static struct ata_port_info bfin_port_info[] = {
1501 {
Sonic Zhangd830d172007-08-21 13:12:31 +08001502 .flags = ATA_FLAG_SLAVE_POSS
1503 | ATA_FLAG_MMIO
1504 | ATA_FLAG_NO_LEGACY,
1505 .pio_mask = 0x1f, /* pio0-4 */
1506 .mwdma_mask = 0,
Sonic Zhangd830d172007-08-21 13:12:31 +08001507 .udma_mask = 0,
Sonic Zhangd830d172007-08-21 13:12:31 +08001508 .port_ops = &bfin_pata_ops,
1509 },
1510};
1511
1512/**
1513 * bfin_reset_controller - initialize BF54x ATAPI controller.
1514 */
1515
1516static int bfin_reset_controller(struct ata_host *host)
1517{
1518 void __iomem *base = (void __iomem *)host->ports[0]->ioaddr.ctl_addr;
1519 int count;
1520 unsigned short status;
1521
1522 /* Disable all ATAPI interrupts */
1523 ATAPI_SET_INT_MASK(base, 0);
1524 SSYNC();
1525
1526 /* Assert the RESET signal 25us*/
1527 ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) | DEV_RST);
1528 udelay(30);
1529
1530 /* Negate the RESET signal for 2ms*/
1531 ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) & ~DEV_RST);
1532 msleep(2);
1533
1534 /* Wait on Busy flag to clear */
1535 count = 10000000;
1536 do {
1537 status = read_atapi_register(base, ATA_REG_STATUS);
Roel Kluinf9d42492008-04-25 11:37:54 +08001538 } while (--count && (status & ATA_BUSY));
Sonic Zhangd830d172007-08-21 13:12:31 +08001539
1540 /* Enable only ATAPI Device interrupt */
1541 ATAPI_SET_INT_MASK(base, 1);
1542 SSYNC();
1543
1544 return (!count);
1545}
1546
1547/**
1548 * atapi_io_port - define atapi peripheral port pins.
1549 */
1550static unsigned short atapi_io_port[] = {
1551 P_ATAPI_RESET,
1552 P_ATAPI_DIOR,
1553 P_ATAPI_DIOW,
1554 P_ATAPI_CS0,
1555 P_ATAPI_CS1,
1556 P_ATAPI_DMACK,
1557 P_ATAPI_DMARQ,
1558 P_ATAPI_INTRQ,
1559 P_ATAPI_IORDY,
1560 0
1561};
1562
1563/**
1564 * bfin_atapi_probe - attach a bfin atapi interface
1565 * @pdev: platform device
1566 *
1567 * Register a bfin atapi interface.
1568 *
1569 *
1570 * Platform devices are expected to contain 2 resources per port:
1571 *
1572 * - I/O Base (IORESOURCE_IO)
1573 * - IRQ (IORESOURCE_IRQ)
1574 *
1575 */
1576static int __devinit bfin_atapi_probe(struct platform_device *pdev)
1577{
1578 int board_idx = 0;
1579 struct resource *res;
1580 struct ata_host *host;
sonic zhangf88c4802007-11-27 12:47:39 +08001581 unsigned int fsclk = get_sclk();
1582 int udma_mode = 5;
Sonic Zhangd830d172007-08-21 13:12:31 +08001583 const struct ata_port_info *ppi[] =
1584 { &bfin_port_info[board_idx], NULL };
1585
1586 /*
1587 * Simple resource validation ..
1588 */
1589 if (unlikely(pdev->num_resources != 2)) {
1590 dev_err(&pdev->dev, "invalid number of resources\n");
1591 return -EINVAL;
1592 }
1593
1594 /*
1595 * Get the register base first
1596 */
1597 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1598 if (res == NULL)
1599 return -EINVAL;
1600
Andrew Mortoned722d32008-01-10 14:33:08 -08001601 while (bfin_port_info[board_idx].udma_mask > 0 &&
1602 udma_fsclk[udma_mode] > fsclk) {
sonic zhangf88c4802007-11-27 12:47:39 +08001603 udma_mode--;
1604 bfin_port_info[board_idx].udma_mask >>= 1;
1605 }
1606
Sonic Zhangd830d172007-08-21 13:12:31 +08001607 /*
1608 * Now that that's out of the way, wire up the port..
1609 */
1610 host = ata_host_alloc_pinfo(&pdev->dev, ppi, 1);
1611 if (!host)
1612 return -ENOMEM;
1613
1614 host->ports[0]->ioaddr.ctl_addr = (void *)res->start;
1615
1616 if (peripheral_request_list(atapi_io_port, "atapi-io-port")) {
1617 dev_err(&pdev->dev, "Requesting Peripherals faild\n");
1618 return -EFAULT;
1619 }
1620
1621 if (bfin_reset_controller(host)) {
1622 peripheral_free_list(atapi_io_port);
1623 dev_err(&pdev->dev, "Fail to reset ATAPI device\n");
1624 return -EFAULT;
1625 }
1626
1627 if (ata_host_activate(host, platform_get_irq(pdev, 0),
Sonic Zhang65c0d4e2008-04-25 17:19:25 +08001628 bfin_ata_interrupt, IRQF_SHARED, &bfin_sht) != 0) {
Sonic Zhangd830d172007-08-21 13:12:31 +08001629 peripheral_free_list(atapi_io_port);
1630 dev_err(&pdev->dev, "Fail to attach ATAPI device\n");
1631 return -ENODEV;
1632 }
1633
Sonic Zhang67e3e222008-09-22 14:47:10 -07001634 dev_set_drvdata(&pdev->dev, host);
1635
Sonic Zhangd830d172007-08-21 13:12:31 +08001636 return 0;
1637}
1638
1639/**
1640 * bfin_atapi_remove - unplug a bfin atapi interface
1641 * @pdev: platform device
1642 *
1643 * A bfin atapi device has been unplugged. Perform the needed
1644 * cleanup. Also called on module unload for any active devices.
1645 */
1646static int __devexit bfin_atapi_remove(struct platform_device *pdev)
1647{
1648 struct device *dev = &pdev->dev;
1649 struct ata_host *host = dev_get_drvdata(dev);
1650
1651 ata_host_detach(host);
Sonic Zhang67e3e222008-09-22 14:47:10 -07001652 dev_set_drvdata(&pdev->dev, NULL);
Sonic Zhangd830d172007-08-21 13:12:31 +08001653
1654 peripheral_free_list(atapi_io_port);
1655
1656 return 0;
1657}
1658
1659#ifdef CONFIG_PM
Sonic Zhang67e3e222008-09-22 14:47:10 -07001660static int bfin_atapi_suspend(struct platform_device *pdev, pm_message_t state)
Sonic Zhangd830d172007-08-21 13:12:31 +08001661{
Sonic Zhang67e3e222008-09-22 14:47:10 -07001662 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1663 if (host)
1664 return ata_host_suspend(host, state);
1665 else
1666 return 0;
Sonic Zhangd830d172007-08-21 13:12:31 +08001667}
1668
Sonic Zhang67e3e222008-09-22 14:47:10 -07001669static int bfin_atapi_resume(struct platform_device *pdev)
Sonic Zhangd830d172007-08-21 13:12:31 +08001670{
Sonic Zhang67e3e222008-09-22 14:47:10 -07001671 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1672 int ret;
1673
1674 if (host) {
1675 ret = bfin_reset_controller(host);
1676 if (ret) {
1677 printk(KERN_ERR DRV_NAME ": Error during HW init\n");
1678 return ret;
1679 }
1680 ata_host_resume(host);
1681 }
1682
Sonic Zhangd830d172007-08-21 13:12:31 +08001683 return 0;
1684}
Sonic Zhang67e3e222008-09-22 14:47:10 -07001685#else
1686#define bfin_atapi_suspend NULL
1687#define bfin_atapi_resume NULL
Sonic Zhangd830d172007-08-21 13:12:31 +08001688#endif
1689
1690static struct platform_driver bfin_atapi_driver = {
1691 .probe = bfin_atapi_probe,
1692 .remove = __devexit_p(bfin_atapi_remove),
Sonic Zhang67e3e222008-09-22 14:47:10 -07001693 .suspend = bfin_atapi_suspend,
1694 .resume = bfin_atapi_resume,
Sonic Zhangd830d172007-08-21 13:12:31 +08001695 .driver = {
1696 .name = DRV_NAME,
1697 .owner = THIS_MODULE,
Sonic Zhangd830d172007-08-21 13:12:31 +08001698 },
1699};
1700
Sonic Zhang858c9c402007-10-16 16:43:27 +08001701#define ATAPI_MODE_SIZE 10
1702static char bfin_atapi_mode[ATAPI_MODE_SIZE];
1703
Sonic Zhangd830d172007-08-21 13:12:31 +08001704static int __init bfin_atapi_init(void)
1705{
1706 pr_info("register bfin atapi driver\n");
Sonic Zhang858c9c402007-10-16 16:43:27 +08001707
1708 switch(bfin_atapi_mode[0]) {
1709 case 'p':
1710 case 'P':
1711 break;
1712 case 'm':
1713 case 'M':
1714 bfin_port_info[0].mwdma_mask = ATA_MWDMA2;
1715 break;
1716 default:
1717 bfin_port_info[0].udma_mask = ATA_UDMA5;
1718 };
1719
Sonic Zhangd830d172007-08-21 13:12:31 +08001720 return platform_driver_register(&bfin_atapi_driver);
1721}
1722
1723static void __exit bfin_atapi_exit(void)
1724{
1725 platform_driver_unregister(&bfin_atapi_driver);
1726}
1727
1728module_init(bfin_atapi_init);
1729module_exit(bfin_atapi_exit);
Sonic Zhang858c9c402007-10-16 16:43:27 +08001730/*
1731 * ATAPI mode:
1732 * pio/PIO
1733 * udma/UDMA (default)
1734 * mwdma/MWDMA
1735 */
1736module_param_string(bfin_atapi_mode, bfin_atapi_mode, ATAPI_MODE_SIZE, 0);
Sonic Zhangd830d172007-08-21 13:12:31 +08001737
1738MODULE_AUTHOR("Sonic Zhang <sonic.zhang@analog.com>");
1739MODULE_DESCRIPTION("PATA driver for blackfin 54x ATAPI controller");
1740MODULE_LICENSE("GPL");
1741MODULE_VERSION(DRV_VERSION);
Kay Sievers458622f2008-04-18 13:41:57 -07001742MODULE_ALIAS("platform:" DRV_NAME);