1 /*
2 * TX4939 internal IDE driver
3 * Based on RBTX49xx patch from CELF patch archive.
4 *
5 * This file is subject to the terms and conditions of the GNU General Public
6 * License. See the file "COPYING" in the main directory of this archive
7 * for more details.
8 *
9 * (C) Copyright TOSHIBA CORPORATION 2005-2007
10 */
11
12 #include <linux/module.h>
13 #include <linux/types.h>
14 #include <linux/ide.h>
15 #include <linux/init.h>
16 #include <linux/delay.h>
17 #include <linux/platform_device.h>
18 #include <linux/io.h>
19 #include <linux/scatterlist.h>
20
21 #define MODNAME "tx4939ide"
22
23 /* ATA Shadow Registers (8-bit except for Data which is 16-bit) */
24 #define TX4939IDE_Data 0x000
25 #define TX4939IDE_Error_Feature 0x001
26 #define TX4939IDE_Sec 0x002
27 #define TX4939IDE_LBA0 0x003
28 #define TX4939IDE_LBA1 0x004
29 #define TX4939IDE_LBA2 0x005
30 #define TX4939IDE_DevHead 0x006
31 #define TX4939IDE_Stat_Cmd 0x007
32 #define TX4939IDE_AltStat_DevCtl 0x402
33 /* H/W DMA Registers */
34 #define TX4939IDE_DMA_Cmd 0x800 /* 8-bit */
35 #define TX4939IDE_DMA_Stat 0x802 /* 8-bit */
36 #define TX4939IDE_PRD_Ptr 0x804 /* 32-bit */
37 /* ATA100 CORE Registers (16-bit) */
38 #define TX4939IDE_Sys_Ctl 0xc00
39 #define TX4939IDE_Xfer_Cnt_1 0xc08
40 #define TX4939IDE_Xfer_Cnt_2 0xc0a
41 #define TX4939IDE_Sec_Cnt 0xc10
42 #define TX4939IDE_Start_Lo_Addr 0xc18
43 #define TX4939IDE_Start_Up_Addr 0xc20
44 #define TX4939IDE_Add_Ctl 0xc28
45 #define TX4939IDE_Lo_Burst_Cnt 0xc30
46 #define TX4939IDE_Up_Burst_Cnt 0xc38
47 #define TX4939IDE_PIO_Addr 0xc88
48 #define TX4939IDE_H_Rst_Tim 0xc90
49 #define TX4939IDE_Int_Ctl 0xc98
50 #define TX4939IDE_Pkt_Cmd 0xcb8
51 #define TX4939IDE_Bxfer_Cnt_Hi 0xcc0
52 #define TX4939IDE_Bxfer_Cnt_Lo 0xcc8
53 #define TX4939IDE_Dev_TErr 0xcd0
54 #define TX4939IDE_Pkt_Xfer_Ctl 0xcd8
55 #define TX4939IDE_Start_TAddr 0xce0
56
57 /* bits for Int_Ctl */
58 #define TX4939IDE_INT_ADDRERR 0x80
59 #define TX4939IDE_INT_REACHMUL 0x40
60 #define TX4939IDE_INT_DEVTIMING 0x20
61 #define TX4939IDE_INT_UDMATERM 0x10
62 #define TX4939IDE_INT_TIMER 0x08
63 #define TX4939IDE_INT_BUSERR 0x04
64 #define TX4939IDE_INT_XFEREND 0x02
65 #define TX4939IDE_INT_HOST 0x01
66
67 #define TX4939IDE_IGNORE_INTS \
68 (TX4939IDE_INT_ADDRERR | TX4939IDE_INT_REACHMUL | \
69 TX4939IDE_INT_DEVTIMING | TX4939IDE_INT_UDMATERM | \
70 TX4939IDE_INT_TIMER | TX4939IDE_INT_XFEREND)
71
72 #ifdef __BIG_ENDIAN
73 #define tx4939ide_swizzlel(a) ((a) ^ 4)
74 #define tx4939ide_swizzlew(a) ((a) ^ 6)
75 #define tx4939ide_swizzleb(a) ((a) ^ 7)
76 #else
77 #define tx4939ide_swizzlel(a) (a)
78 #define tx4939ide_swizzlew(a) (a)
79 #define tx4939ide_swizzleb(a) (a)
80 #endif
81
tx4939ide_readw(void __iomem * base,u32 reg)82 static u16 tx4939ide_readw(void __iomem *base, u32 reg)
83 {
84 return __raw_readw(base + tx4939ide_swizzlew(reg));
85 }
tx4939ide_readb(void __iomem * base,u32 reg)86 static u8 tx4939ide_readb(void __iomem *base, u32 reg)
87 {
88 return __raw_readb(base + tx4939ide_swizzleb(reg));
89 }
tx4939ide_writel(u32 val,void __iomem * base,u32 reg)90 static void tx4939ide_writel(u32 val, void __iomem *base, u32 reg)
91 {
92 __raw_writel(val, base + tx4939ide_swizzlel(reg));
93 }
tx4939ide_writew(u16 val,void __iomem * base,u32 reg)94 static void tx4939ide_writew(u16 val, void __iomem *base, u32 reg)
95 {
96 __raw_writew(val, base + tx4939ide_swizzlew(reg));
97 }
tx4939ide_writeb(u8 val,void __iomem * base,u32 reg)98 static void tx4939ide_writeb(u8 val, void __iomem *base, u32 reg)
99 {
100 __raw_writeb(val, base + tx4939ide_swizzleb(reg));
101 }
102
103 #define TX4939IDE_BASE(hwif) ((void __iomem *)(hwif)->extra_base)
104
tx4939ide_set_pio_mode(ide_drive_t * drive,const u8 pio)105 static void tx4939ide_set_pio_mode(ide_drive_t *drive, const u8 pio)
106 {
107 ide_hwif_t *hwif = drive->hwif;
108 int is_slave = drive->dn;
109 u32 mask, val;
110 u8 safe = pio;
111 ide_drive_t *pair;
112
113 pair = ide_get_pair_dev(drive);
114 if (pair)
115 safe = min(safe, ide_get_best_pio_mode(pair, 255, 4));
116 /*
117 * Update Command Transfer Mode for master/slave and Data
118 * Transfer Mode for this drive.
119 */
120 mask = is_slave ? 0x07f00000 : 0x000007f0;
121 val = ((safe << 8) | (pio << 4)) << (is_slave ? 16 : 0);
122 hwif->select_data = (hwif->select_data & ~mask) | val;
123 /* tx4939ide_tf_load_fixup() will set the Sys_Ctl register */
124 }
125
tx4939ide_set_dma_mode(ide_drive_t * drive,const u8 mode)126 static void tx4939ide_set_dma_mode(ide_drive_t *drive, const u8 mode)
127 {
128 ide_hwif_t *hwif = drive->hwif;
129 u32 mask, val;
130
131 /* Update Data Transfer Mode for this drive. */
132 if (mode >= XFER_UDMA_0)
133 val = mode - XFER_UDMA_0 + 8;
134 else
135 val = mode - XFER_MW_DMA_0 + 5;
136 if (drive->dn) {
137 mask = 0x00f00000;
138 val <<= 20;
139 } else {
140 mask = 0x000000f0;
141 val <<= 4;
142 }
143 hwif->select_data = (hwif->select_data & ~mask) | val;
144 /* tx4939ide_tf_load_fixup() will set the Sys_Ctl register */
145 }
146
tx4939ide_check_error_ints(ide_hwif_t * hwif)147 static u16 tx4939ide_check_error_ints(ide_hwif_t *hwif)
148 {
149 void __iomem *base = TX4939IDE_BASE(hwif);
150 u16 ctl = tx4939ide_readw(base, TX4939IDE_Int_Ctl);
151
152 if (ctl & TX4939IDE_INT_BUSERR) {
153 /* reset FIFO */
154 u16 sysctl = tx4939ide_readw(base, TX4939IDE_Sys_Ctl);
155
156 tx4939ide_writew(sysctl | 0x4000, base, TX4939IDE_Sys_Ctl);
157 mmiowb();
158 /* wait 12GBUSCLK (typ. 60ns @ GBUS200MHz, max 270ns) */
159 ndelay(270);
160 tx4939ide_writew(sysctl, base, TX4939IDE_Sys_Ctl);
161 }
162 if (ctl & (TX4939IDE_INT_ADDRERR |
163 TX4939IDE_INT_DEVTIMING | TX4939IDE_INT_BUSERR))
164 pr_err("%s: Error interrupt %#x (%s%s%s )\n",
165 hwif->name, ctl,
166 ctl & TX4939IDE_INT_ADDRERR ? " Address-Error" : "",
167 ctl & TX4939IDE_INT_DEVTIMING ? " DEV-Timing" : "",
168 ctl & TX4939IDE_INT_BUSERR ? " Bus-Error" : "");
169 return ctl;
170 }
171
tx4939ide_clear_irq(ide_drive_t * drive)172 static void tx4939ide_clear_irq(ide_drive_t *drive)
173 {
174 ide_hwif_t *hwif;
175 void __iomem *base;
176 u16 ctl;
177
178 /*
179 * tx4939ide_dma_test_irq() and tx4939ide_dma_end() do all job
180 * for DMA case.
181 */
182 if (drive->waiting_for_dma)
183 return;
184 hwif = drive->hwif;
185 base = TX4939IDE_BASE(hwif);
186 ctl = tx4939ide_check_error_ints(hwif);
187 tx4939ide_writew(ctl, base, TX4939IDE_Int_Ctl);
188 }
189
tx4939ide_cable_detect(ide_hwif_t * hwif)190 static u8 tx4939ide_cable_detect(ide_hwif_t *hwif)
191 {
192 void __iomem *base = TX4939IDE_BASE(hwif);
193
194 return tx4939ide_readw(base, TX4939IDE_Sys_Ctl) & 0x2000 ?
195 ATA_CBL_PATA40 : ATA_CBL_PATA80;
196 }
197
198 #ifdef __BIG_ENDIAN
tx4939ide_dma_host_set(ide_drive_t * drive,int on)199 static void tx4939ide_dma_host_set(ide_drive_t *drive, int on)
200 {
201 ide_hwif_t *hwif = drive->hwif;
202 u8 unit = drive->dn;
203 void __iomem *base = TX4939IDE_BASE(hwif);
204 u8 dma_stat = tx4939ide_readb(base, TX4939IDE_DMA_Stat);
205
206 if (on)
207 dma_stat |= (1 << (5 + unit));
208 else
209 dma_stat &= ~(1 << (5 + unit));
210
211 tx4939ide_writeb(dma_stat, base, TX4939IDE_DMA_Stat);
212 }
213 #else
214 #define tx4939ide_dma_host_set ide_dma_host_set
215 #endif
216
tx4939ide_clear_dma_status(void __iomem * base)217 static u8 tx4939ide_clear_dma_status(void __iomem *base)
218 {
219 u8 dma_stat;
220
221 /* read DMA status for INTR & ERROR flags */
222 dma_stat = tx4939ide_readb(base, TX4939IDE_DMA_Stat);
223 /* clear INTR & ERROR flags */
224 tx4939ide_writeb(dma_stat | ATA_DMA_INTR | ATA_DMA_ERR, base,
225 TX4939IDE_DMA_Stat);
226 /* recover intmask cleared by writing to bit2 of DMA_Stat */
227 tx4939ide_writew(TX4939IDE_IGNORE_INTS << 8, base, TX4939IDE_Int_Ctl);
228 return dma_stat;
229 }
230
231 #ifdef __BIG_ENDIAN
232 /* custom ide_build_dmatable to handle swapped layout */
tx4939ide_build_dmatable(ide_drive_t * drive,struct request * rq)233 static int tx4939ide_build_dmatable(ide_drive_t *drive, struct request *rq)
234 {
235 ide_hwif_t *hwif = drive->hwif;
236 u32 *table = (u32 *)hwif->dmatable_cpu;
237 unsigned int count = 0;
238 int i;
239 struct scatterlist *sg;
240
241 hwif->sg_nents = ide_build_sglist(drive, rq);
242 if (hwif->sg_nents == 0)
243 return 0;
244
245 for_each_sg(hwif->sg_table, sg, hwif->sg_nents, i) {
246 u32 cur_addr, cur_len, bcount;
247
248 cur_addr = sg_dma_address(sg);
249 cur_len = sg_dma_len(sg);
250
251 /*
252 * Fill in the DMA table, without crossing any 64kB boundaries.
253 */
254
255 while (cur_len) {
256 if (count++ >= PRD_ENTRIES)
257 goto use_pio_instead;
258
259 bcount = 0x10000 - (cur_addr & 0xffff);
260 if (bcount > cur_len)
261 bcount = cur_len;
262 /*
263 * This workaround for zero count seems required.
264 * (standard ide_build_dmatable does it too)
265 */
266 if (bcount == 0x10000)
267 bcount = 0x8000;
268 *table++ = bcount & 0xffff;
269 *table++ = cur_addr;
270 cur_addr += bcount;
271 cur_len -= bcount;
272 }
273 }
274
275 if (count) {
276 *(table - 2) |= 0x80000000;
277 return count;
278 }
279
280 use_pio_instead:
281 printk(KERN_ERR "%s: %s\n", drive->name,
282 count ? "DMA table too small" : "empty DMA table?");
283
284 ide_destroy_dmatable(drive);
285
286 return 0; /* revert to PIO for this request */
287 }
288 #else
289 #define tx4939ide_build_dmatable ide_build_dmatable
290 #endif
291
tx4939ide_dma_setup(ide_drive_t * drive)292 static int tx4939ide_dma_setup(ide_drive_t *drive)
293 {
294 ide_hwif_t *hwif = drive->hwif;
295 void __iomem *base = TX4939IDE_BASE(hwif);
296 struct request *rq = hwif->rq;
297 u8 reading;
298 int nent;
299
300 if (rq_data_dir(rq))
301 reading = 0;
302 else
303 reading = ATA_DMA_WR;
304
305 /* fall back to PIO! */
306 nent = tx4939ide_build_dmatable(drive, rq);
307 if (!nent) {
308 ide_map_sg(drive, rq);
309 return 1;
310 }
311
312 /* PRD table */
313 tx4939ide_writel(hwif->dmatable_dma, base, TX4939IDE_PRD_Ptr);
314
315 /* specify r/w */
316 tx4939ide_writeb(reading, base, TX4939IDE_DMA_Cmd);
317
318 /* clear INTR & ERROR flags */
319 tx4939ide_clear_dma_status(base);
320
321 drive->waiting_for_dma = 1;
322
323 tx4939ide_writew(SECTOR_SIZE / 2, base, drive->dn ?
324 TX4939IDE_Xfer_Cnt_2 : TX4939IDE_Xfer_Cnt_1);
325 tx4939ide_writew(rq->nr_sectors, base, TX4939IDE_Sec_Cnt);
326 return 0;
327 }
328
tx4939ide_dma_end(ide_drive_t * drive)329 static int tx4939ide_dma_end(ide_drive_t *drive)
330 {
331 ide_hwif_t *hwif = drive->hwif;
332 u8 dma_stat, dma_cmd;
333 void __iomem *base = TX4939IDE_BASE(hwif);
334 u16 ctl = tx4939ide_readw(base, TX4939IDE_Int_Ctl);
335
336 drive->waiting_for_dma = 0;
337
338 /* get DMA command mode */
339 dma_cmd = tx4939ide_readb(base, TX4939IDE_DMA_Cmd);
340 /* stop DMA */
341 tx4939ide_writeb(dma_cmd & ~ATA_DMA_START, base, TX4939IDE_DMA_Cmd);
342
343 /* read and clear the INTR & ERROR bits */
344 dma_stat = tx4939ide_clear_dma_status(base);
345
346 /* purge DMA mappings */
347 ide_destroy_dmatable(drive);
348 /* verify good DMA status */
349 wmb();
350
351 if ((dma_stat & (ATA_DMA_INTR | ATA_DMA_ERR | ATA_DMA_ACTIVE)) == 0 &&
352 (ctl & (TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST)) ==
353 (TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST))
354 /* INT_IDE lost... bug? */
355 return 0;
356 return ((dma_stat & (ATA_DMA_INTR | ATA_DMA_ERR | ATA_DMA_ACTIVE)) !=
357 ATA_DMA_INTR) ? 0x10 | dma_stat : 0;
358 }
359
360 /* returns 1 if DMA IRQ issued, 0 otherwise */
tx4939ide_dma_test_irq(ide_drive_t * drive)361 static int tx4939ide_dma_test_irq(ide_drive_t *drive)
362 {
363 ide_hwif_t *hwif = drive->hwif;
364 void __iomem *base = TX4939IDE_BASE(hwif);
365 u16 ctl, ide_int;
366 u8 dma_stat, stat;
367 int found = 0;
368
369 ctl = tx4939ide_check_error_ints(hwif);
370 ide_int = ctl & (TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST);
371 switch (ide_int) {
372 case TX4939IDE_INT_HOST:
373 /* On error, XFEREND might not be asserted. */
374 stat = tx4939ide_readb(base, TX4939IDE_AltStat_DevCtl);
375 if ((stat & (ATA_BUSY | ATA_DRQ | ATA_ERR)) == ATA_ERR)
376 found = 1;
377 else
378 /* Wait for XFEREND (Mask HOST and unmask XFEREND) */
379 ctl &= ~TX4939IDE_INT_XFEREND << 8;
380 ctl |= ide_int << 8;
381 break;
382 case TX4939IDE_INT_HOST | TX4939IDE_INT_XFEREND:
383 dma_stat = tx4939ide_readb(base, TX4939IDE_DMA_Stat);
384 if (!(dma_stat & ATA_DMA_INTR))
385 pr_warning("%s: weird interrupt status. "
386 "DMA_Stat %#02x int_ctl %#04x\n",
387 hwif->name, dma_stat, ctl);
388 found = 1;
389 break;
390 }
391 /*
392 * Do not clear XFEREND, HOST now. They will be cleared by
393 * clearing bit2 of DMA_Stat.
394 */
395 ctl &= ~ide_int;
396 tx4939ide_writew(ctl, base, TX4939IDE_Int_Ctl);
397 return found;
398 }
399
400 #ifdef __BIG_ENDIAN
tx4939ide_dma_sff_read_status(ide_hwif_t * hwif)401 static u8 tx4939ide_dma_sff_read_status(ide_hwif_t *hwif)
402 {
403 void __iomem *base = TX4939IDE_BASE(hwif);
404
405 return tx4939ide_readb(base, TX4939IDE_DMA_Stat);
406 }
407 #else
408 #define tx4939ide_dma_sff_read_status ide_dma_sff_read_status
409 #endif
410
tx4939ide_init_hwif(ide_hwif_t * hwif)411 static void tx4939ide_init_hwif(ide_hwif_t *hwif)
412 {
413 void __iomem *base = TX4939IDE_BASE(hwif);
414
415 /* Soft Reset */
416 tx4939ide_writew(0x8000, base, TX4939IDE_Sys_Ctl);
417 mmiowb();
418 /* at least 20 GBUSCLK (typ. 100ns @ GBUS200MHz, max 450ns) */
419 ndelay(450);
420 tx4939ide_writew(0x0000, base, TX4939IDE_Sys_Ctl);
421 /* mask some interrupts and clear all interrupts */
422 tx4939ide_writew((TX4939IDE_IGNORE_INTS << 8) | 0xff, base,
423 TX4939IDE_Int_Ctl);
424
425 tx4939ide_writew(0x0008, base, TX4939IDE_Lo_Burst_Cnt);
426 tx4939ide_writew(0, base, TX4939IDE_Up_Burst_Cnt);
427 }
428
tx4939ide_init_dma(ide_hwif_t * hwif,const struct ide_port_info * d)429 static int tx4939ide_init_dma(ide_hwif_t *hwif, const struct ide_port_info *d)
430 {
431 hwif->dma_base =
432 hwif->extra_base + tx4939ide_swizzleb(TX4939IDE_DMA_Cmd);
433 /*
434 * Note that we cannot use ATA_DMA_TABLE_OFS, ATA_DMA_STATUS
435 * for big endian.
436 */
437 return ide_allocate_dma_engine(hwif);
438 }
439
tx4939ide_tf_load_fixup(ide_drive_t * drive,ide_task_t * task)440 static void tx4939ide_tf_load_fixup(ide_drive_t *drive, ide_task_t *task)
441 {
442 ide_hwif_t *hwif = drive->hwif;
443 void __iomem *base = TX4939IDE_BASE(hwif);
444 u16 sysctl = hwif->select_data >> (drive->dn ? 16 : 0);
445
446 /*
447 * Fix ATA100 CORE System Control Register. (The write to the
448 * Device/Head register may write wrong data to the System
449 * Control Register)
450 * While Sys_Ctl is written here, selectproc is not needed.
451 */
452 tx4939ide_writew(sysctl, base, TX4939IDE_Sys_Ctl);
453 }
454
455 #ifdef __BIG_ENDIAN
456
457 /* custom iops (independent from SWAP_IO_SPACE) */
tx4939ide_inb(unsigned long port)458 static u8 tx4939ide_inb(unsigned long port)
459 {
460 return __raw_readb((void __iomem *)port);
461 }
462
tx4939ide_outb(u8 value,unsigned long port)463 static void tx4939ide_outb(u8 value, unsigned long port)
464 {
465 __raw_writeb(value, (void __iomem *)port);
466 }
467
tx4939ide_tf_load(ide_drive_t * drive,ide_task_t * task)468 static void tx4939ide_tf_load(ide_drive_t *drive, ide_task_t *task)
469 {
470 ide_hwif_t *hwif = drive->hwif;
471 struct ide_io_ports *io_ports = &hwif->io_ports;
472 struct ide_taskfile *tf = &task->tf;
473 u8 HIHI = task->tf_flags & IDE_TFLAG_LBA48 ? 0xE0 : 0xEF;
474
475 if (task->tf_flags & IDE_TFLAG_FLAGGED)
476 HIHI = 0xFF;
477
478 if (task->tf_flags & IDE_TFLAG_OUT_DATA) {
479 u16 data = (tf->hob_data << 8) | tf->data;
480
481 /* no endian swap */
482 __raw_writew(data, (void __iomem *)io_ports->data_addr);
483 }
484
485 if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
486 tx4939ide_outb(tf->hob_feature, io_ports->feature_addr);
487 if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
488 tx4939ide_outb(tf->hob_nsect, io_ports->nsect_addr);
489 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
490 tx4939ide_outb(tf->hob_lbal, io_ports->lbal_addr);
491 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
492 tx4939ide_outb(tf->hob_lbam, io_ports->lbam_addr);
493 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
494 tx4939ide_outb(tf->hob_lbah, io_ports->lbah_addr);
495
496 if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
497 tx4939ide_outb(tf->feature, io_ports->feature_addr);
498 if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
499 tx4939ide_outb(tf->nsect, io_ports->nsect_addr);
500 if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
501 tx4939ide_outb(tf->lbal, io_ports->lbal_addr);
502 if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
503 tx4939ide_outb(tf->lbam, io_ports->lbam_addr);
504 if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
505 tx4939ide_outb(tf->lbah, io_ports->lbah_addr);
506
507 if (task->tf_flags & IDE_TFLAG_OUT_DEVICE) {
508 tx4939ide_outb((tf->device & HIHI) | drive->select,
509 io_ports->device_addr);
510 tx4939ide_tf_load_fixup(drive, task);
511 }
512 }
513
tx4939ide_tf_read(ide_drive_t * drive,ide_task_t * task)514 static void tx4939ide_tf_read(ide_drive_t *drive, ide_task_t *task)
515 {
516 ide_hwif_t *hwif = drive->hwif;
517 struct ide_io_ports *io_ports = &hwif->io_ports;
518 struct ide_taskfile *tf = &task->tf;
519
520 if (task->tf_flags & IDE_TFLAG_IN_DATA) {
521 u16 data;
522
523 /* no endian swap */
524 data = __raw_readw((void __iomem *)io_ports->data_addr);
525 tf->data = data & 0xff;
526 tf->hob_data = (data >> 8) & 0xff;
527 }
528
529 /* be sure we're looking at the low order bits */
530 tx4939ide_outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr);
531
532 if (task->tf_flags & IDE_TFLAG_IN_FEATURE)
533 tf->feature = tx4939ide_inb(io_ports->feature_addr);
534 if (task->tf_flags & IDE_TFLAG_IN_NSECT)
535 tf->nsect = tx4939ide_inb(io_ports->nsect_addr);
536 if (task->tf_flags & IDE_TFLAG_IN_LBAL)
537 tf->lbal = tx4939ide_inb(io_ports->lbal_addr);
538 if (task->tf_flags & IDE_TFLAG_IN_LBAM)
539 tf->lbam = tx4939ide_inb(io_ports->lbam_addr);
540 if (task->tf_flags & IDE_TFLAG_IN_LBAH)
541 tf->lbah = tx4939ide_inb(io_ports->lbah_addr);
542 if (task->tf_flags & IDE_TFLAG_IN_DEVICE)
543 tf->device = tx4939ide_inb(io_ports->device_addr);
544
545 if (task->tf_flags & IDE_TFLAG_LBA48) {
546 tx4939ide_outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr);
547
548 if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
549 tf->hob_feature =
550 tx4939ide_inb(io_ports->feature_addr);
551 if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
552 tf->hob_nsect = tx4939ide_inb(io_ports->nsect_addr);
553 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
554 tf->hob_lbal = tx4939ide_inb(io_ports->lbal_addr);
555 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
556 tf->hob_lbam = tx4939ide_inb(io_ports->lbam_addr);
557 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
558 tf->hob_lbah = tx4939ide_inb(io_ports->lbah_addr);
559 }
560 }
561
tx4939ide_input_data_swap(ide_drive_t * drive,struct request * rq,void * buf,unsigned int len)562 static void tx4939ide_input_data_swap(ide_drive_t *drive, struct request *rq,
563 void *buf, unsigned int len)
564 {
565 unsigned long port = drive->hwif->io_ports.data_addr;
566 unsigned short *ptr = buf;
567 unsigned int count = (len + 1) / 2;
568
569 while (count--)
570 *ptr++ = cpu_to_le16(__raw_readw((void __iomem *)port));
571 __ide_flush_dcache_range((unsigned long)buf, roundup(len, 2));
572 }
573
tx4939ide_output_data_swap(ide_drive_t * drive,struct request * rq,void * buf,unsigned int len)574 static void tx4939ide_output_data_swap(ide_drive_t *drive, struct request *rq,
575 void *buf, unsigned int len)
576 {
577 unsigned long port = drive->hwif->io_ports.data_addr;
578 unsigned short *ptr = buf;
579 unsigned int count = (len + 1) / 2;
580
581 while (count--) {
582 __raw_writew(le16_to_cpu(*ptr), (void __iomem *)port);
583 ptr++;
584 }
585 __ide_flush_dcache_range((unsigned long)buf, roundup(len, 2));
586 }
587
588 static const struct ide_tp_ops tx4939ide_tp_ops = {
589 .exec_command = ide_exec_command,
590 .read_status = ide_read_status,
591 .read_altstatus = ide_read_altstatus,
592
593 .set_irq = ide_set_irq,
594
595 .tf_load = tx4939ide_tf_load,
596 .tf_read = tx4939ide_tf_read,
597
598 .input_data = tx4939ide_input_data_swap,
599 .output_data = tx4939ide_output_data_swap,
600 };
601
602 #else /* __LITTLE_ENDIAN */
603
tx4939ide_tf_load(ide_drive_t * drive,ide_task_t * task)604 static void tx4939ide_tf_load(ide_drive_t *drive, ide_task_t *task)
605 {
606 ide_tf_load(drive, task);
607 if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
608 tx4939ide_tf_load_fixup(drive, task);
609 }
610
611 static const struct ide_tp_ops tx4939ide_tp_ops = {
612 .exec_command = ide_exec_command,
613 .read_status = ide_read_status,
614 .read_altstatus = ide_read_altstatus,
615
616 .set_irq = ide_set_irq,
617
618 .tf_load = tx4939ide_tf_load,
619 .tf_read = ide_tf_read,
620
621 .input_data = ide_input_data,
622 .output_data = ide_output_data,
623 };
624
625 #endif /* __LITTLE_ENDIAN */
626
627 static const struct ide_port_ops tx4939ide_port_ops = {
628 .set_pio_mode = tx4939ide_set_pio_mode,
629 .set_dma_mode = tx4939ide_set_dma_mode,
630 .clear_irq = tx4939ide_clear_irq,
631 .cable_detect = tx4939ide_cable_detect,
632 };
633
634 static const struct ide_dma_ops tx4939ide_dma_ops = {
635 .dma_host_set = tx4939ide_dma_host_set,
636 .dma_setup = tx4939ide_dma_setup,
637 .dma_exec_cmd = ide_dma_exec_cmd,
638 .dma_start = ide_dma_start,
639 .dma_end = tx4939ide_dma_end,
640 .dma_test_irq = tx4939ide_dma_test_irq,
641 .dma_lost_irq = ide_dma_lost_irq,
642 .dma_timeout = ide_dma_timeout,
643 .dma_sff_read_status = tx4939ide_dma_sff_read_status,
644 };
645
646 static const struct ide_port_info tx4939ide_port_info __initdata = {
647 .init_hwif = tx4939ide_init_hwif,
648 .init_dma = tx4939ide_init_dma,
649 .port_ops = &tx4939ide_port_ops,
650 .dma_ops = &tx4939ide_dma_ops,
651 .tp_ops = &tx4939ide_tp_ops,
652 .host_flags = IDE_HFLAG_MMIO,
653 .pio_mask = ATA_PIO4,
654 .mwdma_mask = ATA_MWDMA2,
655 .udma_mask = ATA_UDMA5,
656 .chipset = ide_generic,
657 };
658
tx4939ide_probe(struct platform_device * pdev)659 static int __init tx4939ide_probe(struct platform_device *pdev)
660 {
661 hw_regs_t hw;
662 hw_regs_t *hws[] = { &hw, NULL, NULL, NULL };
663 struct ide_host *host;
664 struct resource *res;
665 int irq, ret;
666 unsigned long mapbase;
667
668 irq = platform_get_irq(pdev, 0);
669 if (irq < 0)
670 return -ENODEV;
671 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
672 if (!res)
673 return -ENODEV;
674
675 if (!devm_request_mem_region(&pdev->dev, res->start,
676 res->end - res->start + 1, "tx4938ide"))
677 return -EBUSY;
678 mapbase = (unsigned long)devm_ioremap(&pdev->dev, res->start,
679 res->end - res->start + 1);
680 if (!mapbase)
681 return -EBUSY;
682 memset(&hw, 0, sizeof(hw));
683 hw.io_ports.data_addr =
684 mapbase + tx4939ide_swizzlew(TX4939IDE_Data);
685 hw.io_ports.error_addr =
686 mapbase + tx4939ide_swizzleb(TX4939IDE_Error_Feature);
687 hw.io_ports.nsect_addr =
688 mapbase + tx4939ide_swizzleb(TX4939IDE_Sec);
689 hw.io_ports.lbal_addr =
690 mapbase + tx4939ide_swizzleb(TX4939IDE_LBA0);
691 hw.io_ports.lbam_addr =
692 mapbase + tx4939ide_swizzleb(TX4939IDE_LBA1);
693 hw.io_ports.lbah_addr =
694 mapbase + tx4939ide_swizzleb(TX4939IDE_LBA2);
695 hw.io_ports.device_addr =
696 mapbase + tx4939ide_swizzleb(TX4939IDE_DevHead);
697 hw.io_ports.command_addr =
698 mapbase + tx4939ide_swizzleb(TX4939IDE_Stat_Cmd);
699 hw.io_ports.ctl_addr =
700 mapbase + tx4939ide_swizzleb(TX4939IDE_AltStat_DevCtl);
701 hw.irq = irq;
702 hw.dev = &pdev->dev;
703
704 pr_info("TX4939 IDE interface (base %#lx, irq %d)\n", mapbase, irq);
705 host = ide_host_alloc(&tx4939ide_port_info, hws);
706 if (!host)
707 return -ENOMEM;
708 /* use extra_base for base address of the all registers */
709 host->ports[0]->extra_base = mapbase;
710 ret = ide_host_register(host, &tx4939ide_port_info, hws);
711 if (ret) {
712 ide_host_free(host);
713 return ret;
714 }
715 platform_set_drvdata(pdev, host);
716 return 0;
717 }
718
tx4939ide_remove(struct platform_device * pdev)719 static int __exit tx4939ide_remove(struct platform_device *pdev)
720 {
721 struct ide_host *host = platform_get_drvdata(pdev);
722
723 ide_host_remove(host);
724 return 0;
725 }
726
727 #ifdef CONFIG_PM
tx4939ide_resume(struct platform_device * dev)728 static int tx4939ide_resume(struct platform_device *dev)
729 {
730 struct ide_host *host = platform_get_drvdata(dev);
731 ide_hwif_t *hwif = host->ports[0];
732
733 tx4939ide_init_hwif(hwif);
734 return 0;
735 }
736 #else
737 #define tx4939ide_resume NULL
738 #endif
739
740 static struct platform_driver tx4939ide_driver = {
741 .driver = {
742 .name = MODNAME,
743 .owner = THIS_MODULE,
744 },
745 .remove = __exit_p(tx4939ide_remove),
746 .resume = tx4939ide_resume,
747 };
748
tx4939ide_init(void)749 static int __init tx4939ide_init(void)
750 {
751 return platform_driver_probe(&tx4939ide_driver, tx4939ide_probe);
752 }
753
tx4939ide_exit(void)754 static void __exit tx4939ide_exit(void)
755 {
756 platform_driver_unregister(&tx4939ide_driver);
757 }
758
759 module_init(tx4939ide_init);
760 module_exit(tx4939ide_exit);
761
762 MODULE_DESCRIPTION("TX4939 internal IDE driver");
763 MODULE_LICENSE("GPL");
764 MODULE_ALIAS("platform:tx4939ide");
765