2 * File: drivers/ata/pata_bf54x.c
3 * Author: Sonic Zhang <sonic.zhang@analog.com>
6 * Description: PATA Driver for blackfin 54x
9 * Copyright 2007 Analog Devices Inc.
11 * Bugs: Enter bugs at http://blackfin.uclinux.org/
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.
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.
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
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>
41 #include <asm/portmux.h>
43 #define DRV_NAME "pata-bf54x"
44 #define DRV_VERSION "0.9"
46 #define ATA_REG_CTRL 0x0E
47 #define ATA_REG_ALTSTATUS ATA_REG_CTRL
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
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)
165 * PIO Mode - Frequency compatibility
167 /* mode: 0 1 2 3 4 */
168 static const u32 pio_fsclk[] =
169 { 33333333, 33333333, 33333333, 33333333, 33333333 };
172 * MDMA Mode - Frequency compatibility
175 static const u32 mdma_fsclk[] = { 33333333, 33333333, 33333333 };
178 * UDMA Mode - Frequency compatibility
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
185 /* mode: 0 1 2 3 4 5 */
186 static const u32 udma_fsclk[] =
187 { 33333333, 33333333, 40000000, 50000000, 80000000, 133333333 };
190 * Register transfer timing table
192 /* mode: 0 1 2 3 4 */
194 static const u32 reg_t0min[] = { 600, 383, 330, 180, 120 };
195 /* DIOR/DIOW to end cycle */
196 static const u32 reg_t2min[] = { 290, 290, 290, 70, 25 };
197 /* DIOR/DIOW asserted pulse width */
198 static const u32 reg_teocmin[] = { 290, 290, 290, 80, 70 };
203 /* mode: 0 1 2 3 4 */
205 static const u32 pio_t0min[] = { 600, 383, 240, 180, 120 };
206 /* Address valid to DIOR/DIORW */
207 static const u32 pio_t1min[] = { 70, 50, 30, 30, 25 };
208 /* DIOR/DIOW to end cycle */
209 static const u32 pio_t2min[] = { 165, 125, 100, 80, 70 };
210 /* DIOR/DIOW asserted pulse width */
211 static const u32 pio_teocmin[] = { 165, 125, 100, 70, 25 };
213 static const u32 pio_t4min[] = { 30, 20, 15, 10, 10 };
215 /* ******************************************************************
216 * Multiword DMA timing table
217 * ******************************************************************
221 static const u32 mdma_t0min[] = { 480, 150, 120 };
222 /* DIOR/DIOW asserted pulse width */
223 static const u32 mdma_tdmin[] = { 215, 80, 70 };
224 /* DMACK to read data released */
225 static const u32 mdma_thmin[] = { 20, 15, 10 };
226 /* DIOR/DIOW to DMACK hold */
227 static const u32 mdma_tjmin[] = { 20, 5, 5 };
228 /* DIOR negated pulse width */
229 static const u32 mdma_tkrmin[] = { 50, 50, 25 };
230 /* DIOR negated pulse width */
231 static const u32 mdma_tkwmin[] = { 215, 50, 25 };
232 /* CS[1:0] valid to DIOR/DIOW */
233 static const u32 mdma_tmmin[] = { 50, 30, 25 };
234 /* DMACK to read data released */
235 static const u32 mdma_tzmax[] = { 20, 25, 25 };
238 * Ultra DMA timing table
240 /* mode: 0 1 2 3 4 5 */
241 static const u32 udma_tcycmin[] = { 112, 73, 54, 39, 25, 17 };
242 static const u32 udma_tdvsmin[] = { 70, 48, 31, 20, 7, 5 };
243 static const u32 udma_tenvmax[] = { 70, 70, 70, 55, 55, 50 };
244 static const u32 udma_trpmin[] = { 160, 125, 100, 100, 100, 85 };
245 static const u32 udma_tmin[] = { 5, 5, 5, 5, 3, 3 };
248 static const u32 udma_tmlimin = 20;
249 static const u32 udma_tzahmin = 20;
250 static const u32 udma_tenvmin = 20;
251 static const u32 udma_tackmin = 20;
252 static const u32 udma_tssmin = 50;
256 * Function: num_clocks_min
259 * calculate number of SCLK cycles to meet minimum timing
261 static unsigned short num_clocks_min(unsigned long tmin,
265 unsigned short result;
267 tmp = tmin * (fsclk/1000/1000) / 1000;
268 result = (unsigned short)tmp;
269 if ((tmp*1000*1000) < (tmin*(fsclk/1000))) {
277 * bfin_set_piomode - Initialize host controller PATA PIO timings
278 * @ap: Port whose timings we are configuring
281 * Set PIO mode for device.
284 * None (inherited from caller).
287 static void bfin_set_piomode(struct ata_port *ap, struct ata_device *adev)
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;
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.
300 n6 = num_clocks_min(t6min, fsclk);
301 if (mode >= 0 && mode <= 4 && n6 >= 1) {
302 pr_debug("set piomode: mode=%d, fsclk=%ud\n", mode, fsclk);
303 /* calculate the timing values for register transfers. */
304 while (mode > 0 && pio_fsclk[mode] > fsclk)
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);
312 n0 = num_clocks_min(reg_t0min[mode], fsclk);
314 /* increase t2 until we meed the minimum cycle length */
315 if (t2_reg + teoc_reg < n0)
316 t2_reg = n0 - teoc_reg;
318 /* calculate the timing values for pio transfers. */
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);
325 n0 = num_clocks_min(pio_t0min[mode], fsclk);
327 /* increase t2 until we meed the minimum cycle length */
328 if (t2_pio + teoc_pio < n0)
329 t2_pio = n0 - teoc_pio;
331 /* Address valid to DIOR/DIORW */
332 t1_reg = num_clocks_min(pio_t1min[mode], fsclk);
335 t4_reg = num_clocks_min(pio_t4min[mode], fsclk);
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);
341 ATAPI_SET_CONTROL(base,
342 ATAPI_GET_CONTROL(base) | IORDY_EN);
344 ATAPI_SET_CONTROL(base,
345 ATAPI_GET_CONTROL(base) & ~IORDY_EN);
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));
356 * bfin_set_dmamode - Initialize host controller PATA DMA timings
357 * @ap: Port whose timings we are configuring
359 * @udma: udma mode, 0 - 6
361 * Set UDMA mode for device.
364 * None (inherited from caller).
367 static void bfin_set_dmamode(struct ata_port *ap, struct ata_device *adev)
370 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
371 unsigned long fsclk = get_sclk();
372 unsigned short tenv, tack, tcyc_tdvs, tdvs, tmli, tss, trp, tzah;
373 unsigned short tm, td, tkr, tkw, teoc, th;
374 unsigned short n0, nf, tfmin = 5;
375 unsigned short nmin, tcyc;
377 mode = adev->dma_mode - XFER_UDMA_0;
378 if (mode >= 0 && mode <= 5) {
379 pr_debug("set udmamode: mode=%d\n", mode);
380 /* the most restrictive timing value is t6 and tc,
381 * the DIOW - data hold. If one SCLK pulse is longer
382 * than this minimum value then register
383 * transfers cannot be supported at this frequency.
385 while (mode > 0 && udma_fsclk[mode] > fsclk)
388 nmin = num_clocks_min(udma_tmin[mode], fsclk);
390 /* calculate the timing values for Ultra DMA. */
391 tdvs = num_clocks_min(udma_tdvsmin[mode], fsclk);
392 tcyc = num_clocks_min(udma_tcycmin[mode], fsclk);
395 /* increase tcyc - tdvs (tcyc_tdvs) until we meed
396 * the minimum cycle length
398 if (tdvs + tcyc_tdvs < tcyc)
399 tcyc_tdvs = tcyc - tdvs;
401 /* Mow assign the values required for the timing
410 tack = num_clocks_min(udma_tackmin, fsclk);
411 tss = num_clocks_min(udma_tssmin, fsclk);
412 tmli = num_clocks_min(udma_tmlimin, fsclk);
413 tzah = num_clocks_min(udma_tzahmin, fsclk);
414 trp = num_clocks_min(udma_trpmin[mode], fsclk);
415 tenv = num_clocks_min(udma_tenvmin, fsclk);
416 if (tenv <= udma_tenvmax[mode]) {
417 ATAPI_SET_ULTRA_TIM_0(base, (tenv<<8 | tack));
418 ATAPI_SET_ULTRA_TIM_1(base,
419 (tcyc_tdvs<<8 | tdvs));
420 ATAPI_SET_ULTRA_TIM_2(base, (tmli<<8 | tss));
421 ATAPI_SET_ULTRA_TIM_3(base, (trp<<8 | tzah));
423 /* Enable host ATAPI Untra DMA interrupts */
424 ATAPI_SET_INT_MASK(base,
425 ATAPI_GET_INT_MASK(base)
429 | UDMAOUT_TERM_MASK);
434 mode = adev->dma_mode - XFER_MW_DMA_0;
435 if (mode >= 0 && mode <= 2) {
436 pr_debug("set mdmamode: mode=%d\n", mode);
437 /* the most restrictive timing value is tf, the DMACK to
438 * read data released. If one SCLK pulse is longer than
439 * this maximum value then the MDMA mode
440 * cannot be supported at this frequency.
442 while (mode > 0 && mdma_fsclk[mode] > fsclk)
445 nf = num_clocks_min(tfmin, fsclk);
447 /* calculate the timing values for Multi-word DMA. */
449 /* DIOR/DIOW asserted pulse width */
450 td = num_clocks_min(mdma_tdmin[mode], fsclk);
452 /* DIOR negated pulse width */
453 tkw = num_clocks_min(mdma_tkwmin[mode], fsclk);
456 n0 = num_clocks_min(mdma_t0min[mode], fsclk);
458 /* increase tk until we meed the minimum cycle length */
462 /* DIOR negated pulse width - read */
463 tkr = num_clocks_min(mdma_tkrmin[mode], fsclk);
464 /* CS{1:0] valid to DIOR/DIOW */
465 tm = num_clocks_min(mdma_tmmin[mode], fsclk);
466 /* DIOR/DIOW to DMACK hold */
467 teoc = num_clocks_min(mdma_tjmin[mode], fsclk);
469 th = num_clocks_min(mdma_thmin[mode], fsclk);
471 ATAPI_SET_MULTI_TIM_0(base, (tm<<8 | td));
472 ATAPI_SET_MULTI_TIM_1(base, (tkr<<8 | tkw));
473 ATAPI_SET_MULTI_TIM_2(base, (teoc<<8 | th));
475 /* Enable host ATAPI Multi DMA interrupts */
476 ATAPI_SET_INT_MASK(base, ATAPI_GET_INT_MASK(base)
477 | MULTI_DONE_MASK | MULTI_TERM_MASK);
486 * Function: wait_complete
488 * Description: Waits the interrupt from device
491 static inline void wait_complete(void __iomem *base, unsigned short mask)
493 unsigned short status;
496 #define PATA_BF54X_WAIT_TIMEOUT 10000
498 for (i = 0; i < PATA_BF54X_WAIT_TIMEOUT; i++) {
499 status = ATAPI_GET_INT_STATUS(base) & mask;
504 ATAPI_SET_INT_STATUS(base, mask);
509 * Function: write_atapi_register
511 * Description: Writes to ATA Device Resgister
515 static void write_atapi_register(void __iomem *base,
516 unsigned long ata_reg, unsigned short value)
518 /* Program the ATA_DEV_TXBUF register with write data (to be
519 * written into the device).
521 ATAPI_SET_DEV_TXBUF(base, value);
523 /* Program the ATA_DEV_ADDR register with address of the
524 * device register (0x01 to 0x0F).
526 ATAPI_SET_DEV_ADDR(base, ata_reg);
528 /* Program the ATA_CTRL register with dir set to write (1)
530 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | XFER_DIR));
532 /* ensure PIO DMA is not set */
533 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~PIO_USE_DMA));
535 /* and start the transfer */
536 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | PIO_START));
538 /* Wait for the interrupt to indicate the end of the transfer.
539 * (We need to wait on and clear rhe ATA_DEV_INT interrupt status)
541 wait_complete(base, PIO_DONE_INT);
546 * Function: read_atapi_register
548 *Description: Reads from ATA Device Resgister
552 static unsigned short read_atapi_register(void __iomem *base,
553 unsigned long ata_reg)
555 /* Program the ATA_DEV_ADDR register with address of the
556 * device register (0x01 to 0x0F).
558 ATAPI_SET_DEV_ADDR(base, ata_reg);
560 /* Program the ATA_CTRL register with dir set to read (0) and
562 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~XFER_DIR));
564 /* ensure PIO DMA is not set */
565 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~PIO_USE_DMA));
567 /* and start the transfer */
568 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | PIO_START));
570 /* Wait for the interrupt to indicate the end of the transfer.
571 * (PIO_DONE interrupt is set and it doesn't seem to matter
572 * that we don't clear it)
574 wait_complete(base, PIO_DONE_INT);
576 /* Read the ATA_DEV_RXBUF register with write data (to be
577 * written into the device).
579 return ATAPI_GET_DEV_RXBUF(base);
584 * Function: write_atapi_register_data
586 * Description: Writes to ATA Device Resgister
590 static void write_atapi_data(void __iomem *base,
591 int len, unsigned short *buf)
595 /* Set transfer length to 1 */
596 ATAPI_SET_XFER_LEN(base, 1);
598 /* Program the ATA_DEV_ADDR register with address of the
601 ATAPI_SET_DEV_ADDR(base, ATA_REG_DATA);
603 /* Program the ATA_CTRL register with dir set to write (1)
605 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | XFER_DIR));
607 /* ensure PIO DMA is not set */
608 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~PIO_USE_DMA));
610 for (i = 0; i < len; i++) {
611 /* Program the ATA_DEV_TXBUF register with write data (to be
612 * written into the device).
614 ATAPI_SET_DEV_TXBUF(base, buf[i]);
616 /* and start the transfer */
617 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | PIO_START));
619 /* Wait for the interrupt to indicate the end of the transfer.
620 * (We need to wait on and clear rhe ATA_DEV_INT
623 wait_complete(base, PIO_DONE_INT);
629 * Function: read_atapi_register_data
631 * Description: Reads from ATA Device Resgister
635 static void read_atapi_data(void __iomem *base,
636 int len, unsigned short *buf)
640 /* Set transfer length to 1 */
641 ATAPI_SET_XFER_LEN(base, 1);
643 /* Program the ATA_DEV_ADDR register with address of the
646 ATAPI_SET_DEV_ADDR(base, ATA_REG_DATA);
648 /* Program the ATA_CTRL register with dir set to read (0) and
650 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~XFER_DIR));
652 /* ensure PIO DMA is not set */
653 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~PIO_USE_DMA));
655 for (i = 0; i < len; i++) {
656 /* and start the transfer */
657 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | PIO_START));
659 /* Wait for the interrupt to indicate the end of the transfer.
660 * (PIO_DONE interrupt is set and it doesn't seem to matter
661 * that we don't clear it)
663 wait_complete(base, PIO_DONE_INT);
665 /* Read the ATA_DEV_RXBUF register with write data (to be
666 * written into the device).
668 buf[i] = ATAPI_GET_DEV_RXBUF(base);
673 * bfin_tf_load - send taskfile registers to host controller
674 * @ap: Port to which output is sent
675 * @tf: ATA taskfile register set
677 * Note: Original code is ata_tf_load().
680 static void bfin_tf_load(struct ata_port *ap, const struct ata_taskfile *tf)
682 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
683 unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
685 if (tf->ctl != ap->last_ctl) {
686 write_atapi_register(base, ATA_REG_CTRL, tf->ctl);
687 ap->last_ctl = tf->ctl;
692 if (tf->flags & ATA_TFLAG_LBA48) {
693 write_atapi_register(base, ATA_REG_FEATURE,
695 write_atapi_register(base, ATA_REG_NSECT,
697 write_atapi_register(base, ATA_REG_LBAL, tf->hob_lbal);
698 write_atapi_register(base, ATA_REG_LBAM, tf->hob_lbam);
699 write_atapi_register(base, ATA_REG_LBAH, tf->hob_lbah);
700 pr_debug("hob: feat 0x%X nsect 0x%X, lba 0x%X "
709 write_atapi_register(base, ATA_REG_FEATURE, tf->feature);
710 write_atapi_register(base, ATA_REG_NSECT, tf->nsect);
711 write_atapi_register(base, ATA_REG_LBAL, tf->lbal);
712 write_atapi_register(base, ATA_REG_LBAM, tf->lbam);
713 write_atapi_register(base, ATA_REG_LBAH, tf->lbah);
714 pr_debug("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
722 if (tf->flags & ATA_TFLAG_DEVICE) {
723 write_atapi_register(base, ATA_REG_DEVICE, tf->device);
724 pr_debug("device 0x%X\n", tf->device);
731 * bfin_check_status - Read device status reg & clear interrupt
732 * @ap: port where the device is
734 * Note: Original code is ata_check_status().
737 static u8 bfin_check_status(struct ata_port *ap)
739 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
740 return read_atapi_register(base, ATA_REG_STATUS);
744 * bfin_tf_read - input device's ATA taskfile shadow registers
745 * @ap: Port from which input is read
746 * @tf: ATA taskfile register set for storing input
748 * Note: Original code is ata_tf_read().
751 static void bfin_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
753 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
755 tf->command = bfin_check_status(ap);
756 tf->feature = read_atapi_register(base, ATA_REG_ERR);
757 tf->nsect = read_atapi_register(base, ATA_REG_NSECT);
758 tf->lbal = read_atapi_register(base, ATA_REG_LBAL);
759 tf->lbam = read_atapi_register(base, ATA_REG_LBAM);
760 tf->lbah = read_atapi_register(base, ATA_REG_LBAH);
761 tf->device = read_atapi_register(base, ATA_REG_DEVICE);
763 if (tf->flags & ATA_TFLAG_LBA48) {
764 write_atapi_register(base, ATA_REG_CTRL, tf->ctl | ATA_HOB);
765 tf->hob_feature = read_atapi_register(base, ATA_REG_ERR);
766 tf->hob_nsect = read_atapi_register(base, ATA_REG_NSECT);
767 tf->hob_lbal = read_atapi_register(base, ATA_REG_LBAL);
768 tf->hob_lbam = read_atapi_register(base, ATA_REG_LBAM);
769 tf->hob_lbah = read_atapi_register(base, ATA_REG_LBAH);
774 * bfin_exec_command - issue ATA command to host controller
775 * @ap: port to which command is being issued
776 * @tf: ATA taskfile register set
778 * Note: Original code is ata_exec_command().
781 static void bfin_exec_command(struct ata_port *ap,
782 const struct ata_taskfile *tf)
784 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
785 pr_debug("ata%u: cmd 0x%X\n", ap->print_id, tf->command);
787 write_atapi_register(base, ATA_REG_CMD, tf->command);
792 * bfin_check_altstatus - Read device alternate status reg
793 * @ap: port where the device is
796 static u8 bfin_check_altstatus(struct ata_port *ap)
798 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
799 return read_atapi_register(base, ATA_REG_ALTSTATUS);
803 * bfin_std_dev_select - Select device 0/1 on ATA bus
804 * @ap: ATA channel to manipulate
805 * @device: ATA device (numbered from zero) to select
807 * Note: Original code is ata_std_dev_select().
810 static void bfin_std_dev_select(struct ata_port *ap, unsigned int device)
812 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
816 tmp = ATA_DEVICE_OBS;
818 tmp = ATA_DEVICE_OBS | ATA_DEV1;
820 write_atapi_register(base, ATA_REG_DEVICE, tmp);
825 * bfin_bmdma_setup - Set up IDE DMA transaction
826 * @qc: Info associated with this ATA transaction.
828 * Note: Original code is ata_bmdma_setup().
831 static void bfin_bmdma_setup(struct ata_queued_cmd *qc)
833 unsigned short config = WDSIZE_16;
834 struct scatterlist *sg;
836 pr_debug("in atapi dma setup\n");
837 /* 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);
842 ata_for_each_sg(sg, qc) {
843 set_dma_start_addr(CH_ATAPI_TX, sg_dma_address(sg));
844 set_dma_x_count(CH_ATAPI_TX, sg_dma_len(sg) >> 1);
848 /* fill the ATAPI DMA controller */
849 set_dma_config(CH_ATAPI_RX, config);
850 set_dma_x_modify(CH_ATAPI_RX, 2);
851 ata_for_each_sg(sg, qc) {
852 set_dma_start_addr(CH_ATAPI_RX, sg_dma_address(sg));
853 set_dma_x_count(CH_ATAPI_RX, sg_dma_len(sg) >> 1);
859 * bfin_bmdma_start - Start an IDE DMA transaction
860 * @qc: Info associated with this ATA transaction.
862 * Note: Original code is ata_bmdma_start().
865 static void bfin_bmdma_start(struct ata_queued_cmd *qc)
867 struct ata_port *ap = qc->ap;
868 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
869 struct scatterlist *sg;
871 pr_debug("in atapi dma start\n");
872 if (!(ap->udma_mask || ap->mwdma_mask))
875 /* start ATAPI DMA controller*/
876 if (qc->tf.flags & ATA_TFLAG_WRITE) {
878 * On blackfin arch, uncacheable memory is not
879 * allocated with flag GFP_DMA. DMA buffer from
880 * common kenel code should be flushed if WB
881 * data cache is enabled. Otherwise, this loop
882 * is an empty loop and optimized out.
884 ata_for_each_sg(sg, qc) {
885 flush_dcache_range(sg_dma_address(sg),
886 sg_dma_address(sg) + sg_dma_len(sg));
888 enable_dma(CH_ATAPI_TX);
889 pr_debug("enable udma write\n");
891 /* Send ATA DMA write command */
892 bfin_exec_command(ap, &qc->tf);
894 /* set ATA DMA write direction */
895 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base)
898 enable_dma(CH_ATAPI_RX);
899 pr_debug("enable udma read\n");
901 /* Send ATA DMA read command */
902 bfin_exec_command(ap, &qc->tf);
904 /* set ATA DMA read direction */
905 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base)
909 /* Reset all transfer count */
910 ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) | TFRCNT_RST);
912 /* Set transfer length to buffer len */
913 ata_for_each_sg(sg, qc) {
914 ATAPI_SET_XFER_LEN(base, (sg_dma_len(sg) >> 1));
917 /* Enable ATA DMA operation*/
919 ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base)
922 ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base)
927 * bfin_bmdma_stop - Stop IDE DMA transfer
928 * @qc: Command we are ending DMA for
931 static void bfin_bmdma_stop(struct ata_queued_cmd *qc)
933 struct ata_port *ap = qc->ap;
934 struct scatterlist *sg;
936 pr_debug("in atapi dma stop\n");
937 if (!(ap->udma_mask || ap->mwdma_mask))
940 /* stop ATAPI DMA controller*/
941 if (qc->tf.flags & ATA_TFLAG_WRITE)
942 disable_dma(CH_ATAPI_TX);
944 disable_dma(CH_ATAPI_RX);
945 if (ap->hsm_task_state & HSM_ST_LAST) {
947 * On blackfin arch, uncacheable memory is not
948 * allocated with flag GFP_DMA. DMA buffer from
949 * common kenel code should be invalidated if
950 * data cache is enabled. Otherwise, this loop
951 * is an empty loop and optimized out.
953 ata_for_each_sg(sg, qc) {
954 invalidate_dcache_range(
964 * bfin_devchk - PATA device presence detection
965 * @ap: ATA channel to examine
966 * @device: Device to examine (starting at zero)
968 * Note: Original code is ata_devchk().
971 static unsigned int bfin_devchk(struct ata_port *ap,
974 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
977 bfin_std_dev_select(ap, device);
979 write_atapi_register(base, ATA_REG_NSECT, 0x55);
980 write_atapi_register(base, ATA_REG_LBAL, 0xaa);
982 write_atapi_register(base, ATA_REG_NSECT, 0xaa);
983 write_atapi_register(base, ATA_REG_LBAL, 0x55);
985 write_atapi_register(base, ATA_REG_NSECT, 0x55);
986 write_atapi_register(base, ATA_REG_LBAL, 0xaa);
988 nsect = read_atapi_register(base, ATA_REG_NSECT);
989 lbal = read_atapi_register(base, ATA_REG_LBAL);
991 if ((nsect == 0x55) && (lbal == 0xaa))
992 return 1; /* we found a device */
994 return 0; /* nothing found */
998 * bfin_bus_post_reset - PATA device post reset
1000 * Note: Original code is ata_bus_post_reset().
1003 static void bfin_bus_post_reset(struct ata_port *ap, unsigned int devmask)
1005 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
1006 unsigned int dev0 = devmask & (1 << 0);
1007 unsigned int dev1 = devmask & (1 << 1);
1008 unsigned long timeout;
1010 /* if device 0 was found in ata_devchk, wait for its
1014 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
1016 /* if device 1 was found in ata_devchk, wait for
1017 * register access, then wait for BSY to clear
1019 timeout = jiffies + ATA_TMOUT_BOOT;
1023 bfin_std_dev_select(ap, 1);
1024 nsect = read_atapi_register(base, ATA_REG_NSECT);
1025 lbal = read_atapi_register(base, ATA_REG_LBAL);
1026 if ((nsect == 1) && (lbal == 1))
1028 if (time_after(jiffies, timeout)) {
1032 msleep(50); /* give drive a breather */
1035 ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
1037 /* is all this really necessary? */
1038 bfin_std_dev_select(ap, 0);
1040 bfin_std_dev_select(ap, 1);
1042 bfin_std_dev_select(ap, 0);
1046 * bfin_bus_softreset - PATA device software reset
1048 * Note: Original code is ata_bus_softreset().
1051 static unsigned int bfin_bus_softreset(struct ata_port *ap,
1052 unsigned int devmask)
1054 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
1056 /* software reset. causes dev0 to be selected */
1057 write_atapi_register(base, ATA_REG_CTRL, ap->ctl);
1059 write_atapi_register(base, ATA_REG_CTRL, ap->ctl | ATA_SRST);
1061 write_atapi_register(base, ATA_REG_CTRL, ap->ctl);
1063 /* spec mandates ">= 2ms" before checking status.
1064 * We wait 150ms, because that was the magic delay used for
1065 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
1066 * between when the ATA command register is written, and then
1067 * status is checked. Because waiting for "a while" before
1068 * checking status is fine, post SRST, we perform this magic
1069 * delay here as well.
1071 * Old drivers/ide uses the 2mS rule and then waits for ready
1075 /* Before we perform post reset processing we want to see if
1076 * the bus shows 0xFF because the odd clown forgets the D7
1077 * pulldown resistor.
1079 if (bfin_check_status(ap) == 0xFF)
1082 bfin_bus_post_reset(ap, devmask);
1088 * bfin_std_softreset - reset host port via ATA SRST
1089 * @ap: port to reset
1090 * @classes: resulting classes of attached devices
1092 * Note: Original code is ata_std_softreset().
1095 static int bfin_std_softreset(struct ata_link *link, unsigned int *classes,
1096 unsigned long deadline)
1098 struct ata_port *ap = link->ap;
1099 unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
1100 unsigned int devmask = 0, err_mask;
1103 if (ata_link_offline(link)) {
1104 classes[0] = ATA_DEV_NONE;
1108 /* 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);
1114 /* select device 0 again */
1115 bfin_std_dev_select(ap, 0);
1117 /* issue bus reset */
1118 err_mask = bfin_bus_softreset(ap, devmask);
1120 ata_port_printk(ap, KERN_ERR, "SRST failed (err_mask=0x%x)\n",
1125 /* determine by signature whether we have ATA or ATAPI devices */
1126 classes[0] = ata_dev_try_classify(&ap->link.device[0],
1127 devmask & (1 << 0), &err);
1128 if (slave_possible && err != 0x81)
1129 classes[1] = ata_dev_try_classify(&ap->link.device[1],
1130 devmask & (1 << 1), &err);
1137 * bfin_bmdma_status - Read IDE DMA status
1138 * @ap: Port associated with this ATA transaction.
1141 static unsigned char bfin_bmdma_status(struct ata_port *ap)
1143 unsigned char host_stat = 0;
1144 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
1145 unsigned short int_status = ATAPI_GET_INT_STATUS(base);
1147 if (ATAPI_GET_STATUS(base) & (MULTI_XFER_ON|ULTRA_XFER_ON)) {
1148 host_stat |= ATA_DMA_ACTIVE;
1150 if (int_status & (MULTI_DONE_INT|UDMAIN_DONE_INT|UDMAOUT_DONE_INT)) {
1151 host_stat |= ATA_DMA_INTR;
1153 if (int_status & (MULTI_TERM_INT|UDMAIN_TERM_INT|UDMAOUT_TERM_INT)) {
1154 host_stat |= ATA_DMA_ERR;
1161 * bfin_data_xfer - Transfer data by PIO
1162 * @adev: device for this I/O
1164 * @buflen: buffer length
1165 * @write_data: read/write
1167 * Note: Original code is ata_data_xfer().
1170 static void bfin_data_xfer(struct ata_device *adev, unsigned char *buf,
1171 unsigned int buflen, int write_data)
1173 struct ata_port *ap = adev->link->ap;
1174 unsigned int words = buflen >> 1;
1175 unsigned short *buf16 = (u16 *) buf;
1176 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
1178 /* Transfer multiple of 2 bytes */
1180 write_atapi_data(base, words, buf16);
1182 read_atapi_data(base, words, buf16);
1185 /* Transfer trailing 1 byte, if any. */
1186 if (unlikely(buflen & 0x01)) {
1187 unsigned short align_buf[1] = { 0 };
1188 unsigned char *trailing_buf = buf + buflen - 1;
1191 memcpy(align_buf, trailing_buf, 1);
1192 write_atapi_data(base, 1, align_buf);
1194 read_atapi_data(base, 1, align_buf);
1195 memcpy(trailing_buf, align_buf, 1);
1201 * bfin_irq_clear - Clear ATAPI interrupt.
1202 * @ap: Port associated with this ATA transaction.
1204 * Note: Original code is ata_bmdma_irq_clear().
1207 static void bfin_irq_clear(struct ata_port *ap)
1209 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
1211 pr_debug("in atapi irq clear\n");
1213 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);
1219 * bfin_irq_on - Enable interrupts on a port.
1220 * @ap: Port on which interrupts are enabled.
1222 * Note: Original code is ata_irq_on().
1225 static unsigned char bfin_irq_on(struct ata_port *ap)
1227 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
1230 pr_debug("in atapi irq on\n");
1231 ap->ctl &= ~ATA_NIEN;
1232 ap->last_ctl = ap->ctl;
1234 write_atapi_register(base, ATA_REG_CTRL, ap->ctl);
1235 tmp = ata_wait_idle(ap);
1243 * bfin_bmdma_freeze - Freeze DMA controller port
1244 * @ap: port to freeze
1246 * Note: Original code is ata_bmdma_freeze().
1249 static void bfin_bmdma_freeze(struct ata_port *ap)
1251 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
1253 pr_debug("in atapi dma freeze\n");
1254 ap->ctl |= ATA_NIEN;
1255 ap->last_ctl = ap->ctl;
1257 write_atapi_register(base, ATA_REG_CTRL, ap->ctl);
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.
1269 * bfin_bmdma_thaw - Thaw DMA controller port
1272 * Note: Original code is ata_bmdma_thaw().
1275 void bfin_bmdma_thaw(struct ata_port *ap)
1277 bfin_check_status(ap);
1283 * bfin_std_postreset - standard postreset callback
1284 * @ap: the target ata_port
1285 * @classes: classes of attached devices
1287 * Note: Original code is ata_std_postreset().
1290 static void bfin_std_postreset(struct ata_link *link, unsigned int *classes)
1292 struct ata_port *ap = link->ap;
1293 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
1295 /* re-enable interrupts */
1298 /* is double-select really necessary? */
1299 if (classes[0] != ATA_DEV_NONE)
1300 bfin_std_dev_select(ap, 1);
1301 if (classes[1] != ATA_DEV_NONE)
1302 bfin_std_dev_select(ap, 0);
1304 /* bail out if no device is present */
1305 if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
1309 /* set up device control */
1310 write_atapi_register(base, ATA_REG_CTRL, ap->ctl);
1314 * bfin_error_handler - Stock error handler for DMA controller
1315 * @ap: port to handle error for
1318 static void bfin_error_handler(struct ata_port *ap)
1320 ata_bmdma_drive_eh(ap, ata_std_prereset, bfin_std_softreset, NULL,
1321 bfin_std_postreset);
1324 static void bfin_port_stop(struct ata_port *ap)
1326 pr_debug("in atapi port stop\n");
1327 if (ap->udma_mask != 0 || ap->mwdma_mask != 0) {
1328 free_dma(CH_ATAPI_RX);
1329 free_dma(CH_ATAPI_TX);
1333 static int bfin_port_start(struct ata_port *ap)
1335 pr_debug("in atapi port start\n");
1336 if (!(ap->udma_mask || ap->mwdma_mask))
1339 if (request_dma(CH_ATAPI_RX, "BFIN ATAPI RX DMA") >= 0) {
1340 if (request_dma(CH_ATAPI_TX,
1341 "BFIN ATAPI TX DMA") >= 0)
1344 free_dma(CH_ATAPI_RX);
1349 dev_err(ap->dev, "Unable to request ATAPI DMA!"
1350 " Continue in PIO mode.\n");
1355 static struct scsi_host_template bfin_sht = {
1356 .module = THIS_MODULE,
1358 .ioctl = ata_scsi_ioctl,
1359 .queuecommand = ata_scsi_queuecmd,
1360 .can_queue = ATA_DEF_QUEUE,
1361 .this_id = ATA_SHT_THIS_ID,
1362 .sg_tablesize = SG_NONE,
1363 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
1364 .emulated = ATA_SHT_EMULATED,
1365 .use_clustering = ATA_SHT_USE_CLUSTERING,
1366 .proc_name = DRV_NAME,
1367 .dma_boundary = ATA_DMA_BOUNDARY,
1368 .slave_configure = ata_scsi_slave_config,
1369 .slave_destroy = ata_scsi_slave_destroy,
1370 .bios_param = ata_std_bios_param,
1372 .resume = ata_scsi_device_resume,
1373 .suspend = ata_scsi_device_suspend,
1377 static const struct ata_port_operations bfin_pata_ops = {
1378 .set_piomode = bfin_set_piomode,
1379 .set_dmamode = bfin_set_dmamode,
1381 .tf_load = bfin_tf_load,
1382 .tf_read = bfin_tf_read,
1383 .exec_command = bfin_exec_command,
1384 .check_status = bfin_check_status,
1385 .check_altstatus = bfin_check_altstatus,
1386 .dev_select = bfin_std_dev_select,
1388 .bmdma_setup = bfin_bmdma_setup,
1389 .bmdma_start = bfin_bmdma_start,
1390 .bmdma_stop = bfin_bmdma_stop,
1391 .bmdma_status = bfin_bmdma_status,
1392 .data_xfer = bfin_data_xfer,
1394 .qc_prep = ata_noop_qc_prep,
1395 .qc_issue = ata_qc_issue_prot,
1397 .freeze = bfin_bmdma_freeze,
1398 .thaw = bfin_bmdma_thaw,
1399 .error_handler = bfin_error_handler,
1400 .post_internal_cmd = bfin_bmdma_stop,
1402 .irq_handler = ata_interrupt,
1403 .irq_clear = bfin_irq_clear,
1404 .irq_on = bfin_irq_on,
1406 .port_start = bfin_port_start,
1407 .port_stop = bfin_port_stop,
1410 static struct ata_port_info bfin_port_info[] = {
1413 .flags = ATA_FLAG_SLAVE_POSS
1415 | ATA_FLAG_NO_LEGACY,
1416 .pio_mask = 0x1f, /* pio0-4 */
1419 .port_ops = &bfin_pata_ops,
1424 * bfin_reset_controller - initialize BF54x ATAPI controller.
1427 static int bfin_reset_controller(struct ata_host *host)
1429 void __iomem *base = (void __iomem *)host->ports[0]->ioaddr.ctl_addr;
1431 unsigned short status;
1433 /* Disable all ATAPI interrupts */
1434 ATAPI_SET_INT_MASK(base, 0);
1437 /* Assert the RESET signal 25us*/
1438 ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) | DEV_RST);
1441 /* Negate the RESET signal for 2ms*/
1442 ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) & ~DEV_RST);
1445 /* Wait on Busy flag to clear */
1448 status = read_atapi_register(base, ATA_REG_STATUS);
1449 } while (count-- && (status & ATA_BUSY));
1451 /* Enable only ATAPI Device interrupt */
1452 ATAPI_SET_INT_MASK(base, 1);
1459 * atapi_io_port - define atapi peripheral port pins.
1461 static unsigned short atapi_io_port[] = {
1475 * bfin_atapi_probe - attach a bfin atapi interface
1476 * @pdev: platform device
1478 * Register a bfin atapi interface.
1481 * Platform devices are expected to contain 2 resources per port:
1483 * - I/O Base (IORESOURCE_IO)
1484 * - IRQ (IORESOURCE_IRQ)
1487 static int __devinit bfin_atapi_probe(struct platform_device *pdev)
1490 struct resource *res;
1491 struct ata_host *host;
1492 unsigned int fsclk = get_sclk();
1494 const struct ata_port_info *ppi[] =
1495 { &bfin_port_info[board_idx], NULL };
1498 * Simple resource validation ..
1500 if (unlikely(pdev->num_resources != 2)) {
1501 dev_err(&pdev->dev, "invalid number of resources\n");
1506 * Get the register base first
1508 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1512 while (bfin_port_info[board_idx].udma_mask > 0 &&
1513 udma_fsclk[udma_mode] > fsclk) {
1515 bfin_port_info[board_idx].udma_mask >>= 1;
1519 * Now that that's out of the way, wire up the port..
1521 host = ata_host_alloc_pinfo(&pdev->dev, ppi, 1);
1525 host->ports[0]->ioaddr.ctl_addr = (void *)res->start;
1527 if (peripheral_request_list(atapi_io_port, "atapi-io-port")) {
1528 dev_err(&pdev->dev, "Requesting Peripherals faild\n");
1532 if (bfin_reset_controller(host)) {
1533 peripheral_free_list(atapi_io_port);
1534 dev_err(&pdev->dev, "Fail to reset ATAPI device\n");
1538 if (ata_host_activate(host, platform_get_irq(pdev, 0),
1539 ata_interrupt, IRQF_SHARED, &bfin_sht) != 0) {
1540 peripheral_free_list(atapi_io_port);
1541 dev_err(&pdev->dev, "Fail to attach ATAPI device\n");
1549 * bfin_atapi_remove - unplug a bfin atapi interface
1550 * @pdev: platform device
1552 * A bfin atapi device has been unplugged. Perform the needed
1553 * cleanup. Also called on module unload for any active devices.
1555 static int __devexit bfin_atapi_remove(struct platform_device *pdev)
1557 struct device *dev = &pdev->dev;
1558 struct ata_host *host = dev_get_drvdata(dev);
1560 ata_host_detach(host);
1562 peripheral_free_list(atapi_io_port);
1568 int bfin_atapi_suspend(struct platform_device *pdev, pm_message_t state)
1573 int bfin_atapi_resume(struct platform_device *pdev)
1579 static struct platform_driver bfin_atapi_driver = {
1580 .probe = bfin_atapi_probe,
1581 .remove = __devexit_p(bfin_atapi_remove),
1584 .owner = THIS_MODULE,
1586 .suspend = bfin_atapi_suspend,
1587 .resume = bfin_atapi_resume,
1592 #define ATAPI_MODE_SIZE 10
1593 static char bfin_atapi_mode[ATAPI_MODE_SIZE];
1595 static int __init bfin_atapi_init(void)
1597 pr_info("register bfin atapi driver\n");
1599 switch(bfin_atapi_mode[0]) {
1605 bfin_port_info[0].mwdma_mask = ATA_MWDMA2;
1608 bfin_port_info[0].udma_mask = ATA_UDMA5;
1611 return platform_driver_register(&bfin_atapi_driver);
1614 static void __exit bfin_atapi_exit(void)
1616 platform_driver_unregister(&bfin_atapi_driver);
1619 module_init(bfin_atapi_init);
1620 module_exit(bfin_atapi_exit);
1624 * udma/UDMA (default)
1627 module_param_string(bfin_atapi_mode, bfin_atapi_mode, ATAPI_MODE_SIZE, 0);
1629 MODULE_AUTHOR("Sonic Zhang <sonic.zhang@analog.com>");
1630 MODULE_DESCRIPTION("PATA driver for blackfin 54x ATAPI controller");
1631 MODULE_LICENSE("GPL");
1632 MODULE_VERSION(DRV_VERSION);