projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
ide: Add tx4939ide driver (v6)
[linux-2.6-block.git] / drivers / ide / tx4939ide.c
CommitLineData
37897989
AN		 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
82static u16 tx4939ide_readw(void __iomem *base, u32 reg)
83{
84 return __raw_readw(base + tx4939ide_swizzlew(reg));
85}
86static u8 tx4939ide_readb(void __iomem *base, u32 reg)
87{
88 return __raw_readb(base + tx4939ide_swizzleb(reg));
89}
90static void tx4939ide_writel(u32 val, void __iomem *base, u32 reg)
91{
92 __raw_writel(val, base + tx4939ide_swizzlel(reg));
93}
94static void tx4939ide_writew(u16 val, void __iomem *base, u32 reg)
95{
96 __raw_writew(val, base + tx4939ide_swizzlew(reg));
97}
98static 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
105static 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
126static 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
147static 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
172static 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
190static 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
199static 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
217static 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 */
233static 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 *table++ = bcount & 0xffff;
263 *table++ = cur_addr;
264 cur_addr += bcount;
265 cur_len -= bcount;
266 }
267 }
268
269 if (count) {
270 *(table - 2) |= 0x80000000;
271 return count;
272 }
273
274use_pio_instead:
275 printk(KERN_ERR "%s: %s\n", drive->name,
276 count ? "DMA table too small" : "empty DMA table?");
277
278 ide_destroy_dmatable(drive);
279
280 return 0; /* revert to PIO for this request */
281}
282#else
283#define tx4939ide_build_dmatable ide_build_dmatable
284#endif
285
286static int tx4939ide_dma_setup(ide_drive_t *drive)
287{
288 ide_hwif_t *hwif = drive->hwif;
289 void __iomem *base = TX4939IDE_BASE(hwif);
290 struct request *rq = hwif->hwgroup->rq;
291 u8 reading;
292 int nent;
293
294 if (rq_data_dir(rq))
295 reading = 0;
296 else
297 reading = ATA_DMA_WR;
298
299 /* fall back to PIO! */
300 nent = tx4939ide_build_dmatable(drive, rq);
301 if (!nent) {
302 ide_map_sg(drive, rq);
303 return 1;
304 }
305
306 /* PRD table */
307 tx4939ide_writel(hwif->dmatable_dma, base, TX4939IDE_PRD_Ptr);
308
309 /* specify r/w */
310 tx4939ide_writeb(reading, base, TX4939IDE_DMA_Cmd);
311
312 /* clear INTR & ERROR flags */
313 tx4939ide_clear_dma_status(base);
314
315 drive->waiting_for_dma = 1;
316
317 tx4939ide_writew(SECTOR_SIZE / 2, base, drive->dn ?
318 TX4939IDE_Xfer_Cnt_2 : TX4939IDE_Xfer_Cnt_1);
319 tx4939ide_writew(rq->nr_sectors, base, TX4939IDE_Sec_Cnt);
320 return 0;
321}
322
323static int tx4939ide_dma_end(ide_drive_t *drive)
324{
325 ide_hwif_t *hwif = drive->hwif;
326 u8 dma_stat, dma_cmd;
327 void __iomem *base = TX4939IDE_BASE(hwif);
328 u16 ctl = tx4939ide_readw(base, TX4939IDE_Int_Ctl);
329
330 drive->waiting_for_dma = 0;
331
332 /* get DMA command mode */
333 dma_cmd = tx4939ide_readb(base, TX4939IDE_DMA_Cmd);
334 /* stop DMA */
335 tx4939ide_writeb(dma_cmd & ~ATA_DMA_START, base, TX4939IDE_DMA_Cmd);
336
337 /* read and clear the INTR & ERROR bits */
338 dma_stat = tx4939ide_clear_dma_status(base);
339
340 /* purge DMA mappings */
341 ide_destroy_dmatable(drive);
342 /* verify good DMA status */
343 wmb();
344
345 if ((dma_stat & (ATA_DMA_INTR | ATA_DMA_ERR | ATA_DMA_ACTIVE)) == 0 &&
346 (ctl & (TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST)) ==
347 (TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST))
348 /* INT_IDE lost... bug? */
349 return 0;
350 return ((dma_stat & (ATA_DMA_INTR | ATA_DMA_ERR | ATA_DMA_ACTIVE)) !=
351 ATA_DMA_INTR) ? 0x10 | dma_stat : 0;
352}
353
354/* returns 1 if DMA IRQ issued, 0 otherwise */
355static int tx4939ide_dma_test_irq(ide_drive_t *drive)
356{
357 ide_hwif_t *hwif = drive->hwif;
358 void __iomem *base = TX4939IDE_BASE(hwif);
359 u16 ctl, ide_int;
360 u8 dma_stat, stat;
361 int found = 0;
362
363 ctl = tx4939ide_check_error_ints(hwif);
364 ide_int = ctl & (TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST);
365 switch (ide_int) {
366 case TX4939IDE_INT_HOST:
367 /* On error, XFEREND might not be asserted. */
368 stat = tx4939ide_readb(base, TX4939IDE_AltStat_DevCtl);
369 if ((stat & (ATA_BUSY | ATA_DRQ | ATA_ERR)) == ATA_ERR)
370 found = 1;
371 else
372 /* Wait for XFEREND (Mask HOST and unmask XFEREND) */
373 ctl &= ~TX4939IDE_INT_XFEREND << 8;
374 ctl |= ide_int << 8;
375 break;
376 case TX4939IDE_INT_HOST | TX4939IDE_INT_XFEREND:
377 dma_stat = tx4939ide_readb(base, TX4939IDE_DMA_Stat);
378 if (!(dma_stat & ATA_DMA_INTR))
379 pr_warning("%s: weird interrupt status. "
380 "DMA_Stat %#02x int_ctl %#04x\n",
381 hwif->name, dma_stat, ctl);
382 found = 1;
383 break;
384 }
385 /*
386 * Do not clear XFEREND, HOST now. They will be cleared by
387 * clearing bit2 of DMA_Stat.
388 */
389 ctl &= ~ide_int;
390 tx4939ide_writew(ctl, base, TX4939IDE_Int_Ctl);
391 return found;
392}
393
394static void tx4939ide_init_hwif(ide_hwif_t *hwif)
395{
396 void __iomem *base = TX4939IDE_BASE(hwif);
397
398 /* Soft Reset */
399 tx4939ide_writew(0x8000, base, TX4939IDE_Sys_Ctl);
400 mmiowb();
401 /* at least 20 GBUSCLK (typ. 100ns @ GBUS200MHz, max 450ns) */
402 ndelay(450);
403 tx4939ide_writew(0x0000, base, TX4939IDE_Sys_Ctl);
404 /* mask some interrupts and clear all interrupts */
405 tx4939ide_writew((TX4939IDE_IGNORE_INTS << 8) | 0xff, base,
406 TX4939IDE_Int_Ctl);
407
408 tx4939ide_writew(0x0008, base, TX4939IDE_Lo_Burst_Cnt);
409 tx4939ide_writew(0, base, TX4939IDE_Up_Burst_Cnt);
410}
411
412static int tx4939ide_init_dma(ide_hwif_t *hwif, const struct ide_port_info *d)
413{
414 hwif->dma_base =
415 hwif->extra_base + tx4939ide_swizzleb(TX4939IDE_DMA_Cmd);
416 /*
417 * Note that we cannot use ATA_DMA_TABLE_OFS, ATA_DMA_STATUS
418 * for big endian.
419 */
420 return ide_allocate_dma_engine(hwif);
421}
422
423static void tx4939ide_tf_load_fixup(ide_drive_t *drive, ide_task_t *task)
424{
425 ide_hwif_t *hwif = drive->hwif;
426 void __iomem *base = TX4939IDE_BASE(hwif);
427 u16 sysctl = hwif->select_data >> (drive->dn ? 16 : 0);
428
429 /*
430 * Fix ATA100 CORE System Control Register. (The write to the
431 * Device/Head register may write wrong data to the System
432 * Control Register)
433 * While Sys_Ctl is written here, selectproc is not needed.
434 */
435 tx4939ide_writew(sysctl, base, TX4939IDE_Sys_Ctl);
436}
437
438#ifdef __BIG_ENDIAN
439
440static u8 tx4939ide_read_sff_dma_status(ide_hwif_t *hwif)
441{
442 void __iomem *base = TX4939IDE_BASE(hwif);
443
444 return tx4939ide_readb(base, TX4939IDE_DMA_Stat);
445}
446
447/* custom iops (independent from SWAP_IO_SPACE) */
448static u8 tx4939ide_inb(unsigned long port)
449{
450 return __raw_readb((void __iomem *)port);
451}
452
453static void tx4939ide_outb(u8 value, unsigned long port)
454{
455 __raw_writeb(value, (void __iomem *)port);
456}
457
458static void tx4939ide_tf_load(ide_drive_t *drive, ide_task_t *task)
459{
460 ide_hwif_t *hwif = drive->hwif;
461 struct ide_io_ports *io_ports = &hwif->io_ports;
462 struct ide_taskfile *tf = &task->tf;
463 u8 HIHI = task->tf_flags & IDE_TFLAG_LBA48 ? 0xE0 : 0xEF;
464
465 if (task->tf_flags & IDE_TFLAG_FLAGGED)
466 HIHI = 0xFF;
467
468 if (task->tf_flags & IDE_TFLAG_OUT_DATA) {
469 u16 data = (tf->hob_data << 8) | tf->data;
470
471 /* no endian swap */
472 __raw_writew(data, (void __iomem *)io_ports->data_addr);
473 }
474
475 if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
476 tx4939ide_outb(tf->hob_feature, io_ports->feature_addr);
477 if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
478 tx4939ide_outb(tf->hob_nsect, io_ports->nsect_addr);
479 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
480 tx4939ide_outb(tf->hob_lbal, io_ports->lbal_addr);
481 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
482 tx4939ide_outb(tf->hob_lbam, io_ports->lbam_addr);
483 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
484 tx4939ide_outb(tf->hob_lbah, io_ports->lbah_addr);
485
486 if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
487 tx4939ide_outb(tf->feature, io_ports->feature_addr);
488 if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
489 tx4939ide_outb(tf->nsect, io_ports->nsect_addr);
490 if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
491 tx4939ide_outb(tf->lbal, io_ports->lbal_addr);
492 if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
493 tx4939ide_outb(tf->lbam, io_ports->lbam_addr);
494 if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
495 tx4939ide_outb(tf->lbah, io_ports->lbah_addr);
496
497 if (task->tf_flags & IDE_TFLAG_OUT_DEVICE) {
498 tx4939ide_outb((tf->device & HIHI) | drive->select,
499 io_ports->device_addr);
500 tx4939ide_tf_load_fixup(drive, task);
501 }
502}
503
504static void tx4939ide_tf_read(ide_drive_t *drive, ide_task_t *task)
505{
506 ide_hwif_t *hwif = drive->hwif;
507 struct ide_io_ports *io_ports = &hwif->io_ports;
508 struct ide_taskfile *tf = &task->tf;
509
510 if (task->tf_flags & IDE_TFLAG_IN_DATA) {
511 u16 data;
512
513 /* no endian swap */
514 data = __raw_readw((void __iomem *)io_ports->data_addr);
515 tf->data = data & 0xff;
516 tf->hob_data = (data >> 8) & 0xff;
517 }
518
519 /* be sure we're looking at the low order bits */
520 tx4939ide_outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr);
521
522 if (task->tf_flags & IDE_TFLAG_IN_FEATURE)
523 tf->feature = tx4939ide_inb(io_ports->feature_addr);
524 if (task->tf_flags & IDE_TFLAG_IN_NSECT)
525 tf->nsect = tx4939ide_inb(io_ports->nsect_addr);
526 if (task->tf_flags & IDE_TFLAG_IN_LBAL)
527 tf->lbal = tx4939ide_inb(io_ports->lbal_addr);
528 if (task->tf_flags & IDE_TFLAG_IN_LBAM)
529 tf->lbam = tx4939ide_inb(io_ports->lbam_addr);
530 if (task->tf_flags & IDE_TFLAG_IN_LBAH)
531 tf->lbah = tx4939ide_inb(io_ports->lbah_addr);
532 if (task->tf_flags & IDE_TFLAG_IN_DEVICE)
533 tf->device = tx4939ide_inb(io_ports->device_addr);
534
535 if (task->tf_flags & IDE_TFLAG_LBA48) {
536 tx4939ide_outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr);
537
538 if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
539 tf->hob_feature =
540 tx4939ide_inb(io_ports->feature_addr);
541 if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
542 tf->hob_nsect = tx4939ide_inb(io_ports->nsect_addr);
543 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
544 tf->hob_lbal = tx4939ide_inb(io_ports->lbal_addr);
545 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
546 tf->hob_lbam = tx4939ide_inb(io_ports->lbam_addr);
547 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
548 tf->hob_lbah = tx4939ide_inb(io_ports->lbah_addr);
549 }
550}
551
552static void tx4939ide_input_data_swap(ide_drive_t *drive, struct request *rq,
553 void *buf, unsigned int len)
554{
555 unsigned long port = drive->hwif->io_ports.data_addr;
556 unsigned short *ptr = buf;
557 unsigned int count = (len + 1) / 2;
558
559 while (count--)
560 *ptr++ = cpu_to_le16(__raw_readw((void __iomem *)port));
561 __ide_flush_dcache_range((unsigned long)buf, count * 2);
562}
563
564static void tx4939ide_output_data_swap(ide_drive_t *drive, struct request *rq,
565 void *buf, unsigned int len)
566{
567 unsigned long port = drive->hwif->io_ports.data_addr;
568 unsigned short *ptr = buf;
569 unsigned int count = (len + 1) / 2;
570
571 while (count--) {
572 __raw_writew(le16_to_cpu(*ptr), (void __iomem *)port);
573 ptr++;
574 }
575 __ide_flush_dcache_range((unsigned long)buf, count * 2);
576}
577
578static const struct ide_tp_ops tx4939ide_tp_ops = {
579 .exec_command = ide_exec_command,
580 .read_status = ide_read_status,
581 .read_altstatus = ide_read_altstatus,
582 .read_sff_dma_status = tx4939ide_read_sff_dma_status,
583
584 .set_irq = ide_set_irq,
585
586 .tf_load = tx4939ide_tf_load,
587 .tf_read = tx4939ide_tf_read,
588
589 .input_data = tx4939ide_input_data_swap,
590 .output_data = tx4939ide_output_data_swap,
591};
592
593#else /* __LITTLE_ENDIAN */
594
595static void tx4939ide_tf_load(ide_drive_t *drive, ide_task_t *task)
596{
597 ide_tf_load(drive, task);
598 if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
599 tx4939ide_tf_load_fixup(drive, task);
600}
601
602static const struct ide_tp_ops tx4939ide_tp_ops = {
603 .exec_command = ide_exec_command,
604 .read_status = ide_read_status,
605 .read_altstatus = ide_read_altstatus,
606 .read_sff_dma_status = ide_read_sff_dma_status,
607
608 .set_irq = ide_set_irq,
609
610 .tf_load = tx4939ide_tf_load,
611 .tf_read = ide_tf_read,
612
613 .input_data = ide_input_data,
614 .output_data = ide_output_data,
615};
616
617#endif /* __LITTLE_ENDIAN */
618
619static const struct ide_port_ops tx4939ide_port_ops = {
620 .set_pio_mode = tx4939ide_set_pio_mode,
621 .set_dma_mode = tx4939ide_set_dma_mode,
622 .clear_irq = tx4939ide_clear_irq,
623 .cable_detect = tx4939ide_cable_detect,
624};
625
626static const struct ide_dma_ops tx4939ide_dma_ops = {
627 .dma_host_set = tx4939ide_dma_host_set,
628 .dma_setup = tx4939ide_dma_setup,
629 .dma_exec_cmd = ide_dma_exec_cmd,
630 .dma_start = ide_dma_start,
631 .dma_end = tx4939ide_dma_end,
632 .dma_test_irq = tx4939ide_dma_test_irq,
633 .dma_lost_irq = ide_dma_lost_irq,
634 .dma_timeout = ide_dma_timeout,
635};
636
637static const struct ide_port_info tx4939ide_port_info __initdata = {
638 .init_hwif = tx4939ide_init_hwif,
639 .init_dma = tx4939ide_init_dma,
640 .port_ops = &tx4939ide_port_ops,
641 .dma_ops = &tx4939ide_dma_ops,
642 .tp_ops = &tx4939ide_tp_ops,
643 .host_flags = IDE_HFLAG_MMIO,
644 .pio_mask = ATA_PIO4,
645 .mwdma_mask = ATA_MWDMA2,
646 .udma_mask = ATA_UDMA5,
647};
648
649static int __init tx4939ide_probe(struct platform_device *pdev)
650{
651 hw_regs_t hw;
652 hw_regs_t *hws[] = { &hw, NULL, NULL, NULL };
653 struct ide_host *host;
654 struct resource *res;
655 int irq, ret;
656 unsigned long mapbase;
657
658 irq = platform_get_irq(pdev, 0);
659 if (irq < 0)
660 return -ENODEV;
661 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
662 if (!res)
663 return -ENODEV;
664
665 if (!devm_request_mem_region(&pdev->dev, res->start,
666 res->end - res->start + 1, "tx4938ide"))
667 return -EBUSY;
668 mapbase = (unsigned long)devm_ioremap(&pdev->dev, res->start,
669 res->end - res->start + 1);
670 if (!mapbase)
671 return -EBUSY;
672 memset(&hw, 0, sizeof(hw));
673 hw.io_ports.data_addr =
674 mapbase + tx4939ide_swizzlew(TX4939IDE_Data);
675 hw.io_ports.error_addr =
676 mapbase + tx4939ide_swizzleb(TX4939IDE_Error_Feature);
677 hw.io_ports.nsect_addr =
678 mapbase + tx4939ide_swizzleb(TX4939IDE_Sec);
679 hw.io_ports.lbal_addr =
680 mapbase + tx4939ide_swizzleb(TX4939IDE_LBA0);
681 hw.io_ports.lbam_addr =
682 mapbase + tx4939ide_swizzleb(TX4939IDE_LBA1);
683 hw.io_ports.lbah_addr =
684 mapbase + tx4939ide_swizzleb(TX4939IDE_LBA2);
685 hw.io_ports.device_addr =
686 mapbase + tx4939ide_swizzleb(TX4939IDE_DevHead);
687 hw.io_ports.command_addr =
688 mapbase + tx4939ide_swizzleb(TX4939IDE_Stat_Cmd);
689 hw.io_ports.ctl_addr =
690 mapbase + tx4939ide_swizzleb(TX4939IDE_AltStat_DevCtl);
691 hw.irq = irq;
692 hw.dev = &pdev->dev;
693
694 pr_info("TX4939 IDE interface (base %#lx, irq %d)\n", mapbase, irq);
695 host = ide_host_alloc(&tx4939ide_port_info, hws);
696 if (!host)
697 return -ENOMEM;
698 /* use extra_base for base address of the all registers */
699 host->ports[0]->extra_base = mapbase;
700 ret = ide_host_register(host, &tx4939ide_port_info, hws);
701 if (ret) {
702 ide_host_free(host);
703 return ret;
704 }
705 platform_set_drvdata(pdev, host);
706 return 0;
707}
708
709static int __exit tx4939ide_remove(struct platform_device *pdev)
710{
711 struct ide_host *host = platform_get_drvdata(pdev);
712
713 ide_host_remove(host);
714 return 0;
715}
716
717#ifdef CONFIG_PM
718static int tx4939ide_resume(struct platform_device *dev)
719{
720 struct ide_host *host = platform_get_drvdata(dev);
721 ide_hwif_t *hwif = host->ports[0];
722
723 tx4939ide_init_hwif(hwif);
724 return 0;
725}
726#else
727#define tx4939ide_resume NULL
728#endif
729
730static struct platform_driver tx4939ide_driver = {
731 .driver = {
732 .name = MODNAME,
733 .owner = THIS_MODULE,
734 },
735 .remove = __exit_p(tx4939ide_remove),
736 .resume = tx4939ide_resume,
737};
738
739static int __init tx4939ide_init(void)
740{
741 return platform_driver_probe(&tx4939ide_driver, tx4939ide_probe);
742}
743
744static void __exit tx4939ide_exit(void)
745{
746 platform_driver_unregister(&tx4939ide_driver);
747}
748
749module_init(tx4939ide_init);
750module_exit(tx4939ide_exit);
751
752MODULE_DESCRIPTION("TX4939 internal IDE driver");
753MODULE_LICENSE("GPL");
754MODULE_ALIAS("platform:tx4939ide");
Linux 6.x block layer and io_uring tree(s)