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30#include <linux/types.h>
31#include <linux/module.h>
32#include <linux/kernel.h>
33#include <linux/delay.h>
34#include <linux/platform_device.h>
35#include <linux/init.h>
36#include <linux/ide.h>
37#include <linux/scatterlist.h>
38
39#include <asm/mach-au1x00/au1000.h>
40#include <asm/mach-au1x00/au1xxx_dbdma.h>
41#include <asm/mach-au1x00/au1xxx_ide.h>
42
43#define DRV_NAME "au1200-ide"
44#define DRV_AUTHOR "Enrico Walther <enrico.walther@amd.com> / Pete Popov <ppopov@embeddedalley.com>"
45
46#ifndef IDE_REG_SHIFT
47#define IDE_REG_SHIFT 5
48#endif
49
50
51#define IDE_AU1XXX_BURSTMODE 1
52
53static _auide_hwif auide_hwif;
54
55#if defined(CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA)
56
57static inline void auide_insw(unsigned long port, void *addr, u32 count)
58{
59 _auide_hwif *ahwif = &auide_hwif;
60 chan_tab_t *ctp;
61 au1x_ddma_desc_t *dp;
62
63 if (!au1xxx_dbdma_put_dest(ahwif->rx_chan, virt_to_phys(addr),
64 count << 1, DDMA_FLAGS_NOIE)) {
65 printk(KERN_ERR "%s failed %d\n", __func__, __LINE__);
66 return;
67 }
68 ctp = *((chan_tab_t **)ahwif->rx_chan);
69 dp = ctp->cur_ptr;
70 while (dp->dscr_cmd0 & DSCR_CMD0_V)
71 ;
72 ctp->cur_ptr = au1xxx_ddma_get_nextptr_virt(dp);
73}
74
75static inline void auide_outsw(unsigned long port, void *addr, u32 count)
76{
77 _auide_hwif *ahwif = &auide_hwif;
78 chan_tab_t *ctp;
79 au1x_ddma_desc_t *dp;
80
81 if (!au1xxx_dbdma_put_source(ahwif->tx_chan, virt_to_phys(addr),
82 count << 1, DDMA_FLAGS_NOIE)) {
83 printk(KERN_ERR "%s failed %d\n", __func__, __LINE__);
84 return;
85 }
86 ctp = *((chan_tab_t **)ahwif->tx_chan);
87 dp = ctp->cur_ptr;
88 while (dp->dscr_cmd0 & DSCR_CMD0_V)
89 ;
90 ctp->cur_ptr = au1xxx_ddma_get_nextptr_virt(dp);
91}
92
93static void au1xxx_input_data(ide_drive_t *drive, struct ide_cmd *cmd,
94 void *buf, unsigned int len)
95{
96 auide_insw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
97}
98
99static void au1xxx_output_data(ide_drive_t *drive, struct ide_cmd *cmd,
100 void *buf, unsigned int len)
101{
102 auide_outsw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
103}
104#endif
105
106static void au1xxx_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
107{
108 int mem_sttime = 0, mem_stcfg = au_readl(MEM_STCFG2);
109
110 switch (drive->pio_mode - XFER_PIO_0) {
111 case 0:
112 mem_sttime = SBC_IDE_TIMING(PIO0);
113
114
115 mem_stcfg |= TS_MASK;
116 mem_stcfg &= ~TCSOE_MASK;
117 mem_stcfg &= ~TOECS_MASK;
118 mem_stcfg |= SBC_IDE_PIO0_TCSOE | SBC_IDE_PIO0_TOECS;
119 break;
120
121 case 1:
122 mem_sttime = SBC_IDE_TIMING(PIO1);
123
124
125 mem_stcfg |= TS_MASK;
126 mem_stcfg &= ~TCSOE_MASK;
127 mem_stcfg &= ~TOECS_MASK;
128 mem_stcfg |= SBC_IDE_PIO1_TCSOE | SBC_IDE_PIO1_TOECS;
129 break;
130
131 case 2:
132 mem_sttime = SBC_IDE_TIMING(PIO2);
133
134
135 mem_stcfg &= ~TS_MASK;
136 mem_stcfg &= ~TCSOE_MASK;
137 mem_stcfg &= ~TOECS_MASK;
138 mem_stcfg |= SBC_IDE_PIO2_TCSOE | SBC_IDE_PIO2_TOECS;
139 break;
140
141 case 3:
142 mem_sttime = SBC_IDE_TIMING(PIO3);
143
144
145 mem_stcfg &= ~TS_MASK;
146 mem_stcfg &= ~TCSOE_MASK;
147 mem_stcfg &= ~TOECS_MASK;
148 mem_stcfg |= SBC_IDE_PIO3_TCSOE | SBC_IDE_PIO3_TOECS;
149
150 break;
151
152 case 4:
153 mem_sttime = SBC_IDE_TIMING(PIO4);
154
155
156 mem_stcfg &= ~TS_MASK;
157 mem_stcfg &= ~TCSOE_MASK;
158 mem_stcfg &= ~TOECS_MASK;
159 mem_stcfg |= SBC_IDE_PIO4_TCSOE | SBC_IDE_PIO4_TOECS;
160 break;
161 }
162
163 au_writel(mem_sttime,MEM_STTIME2);
164 au_writel(mem_stcfg,MEM_STCFG2);
165}
166
167static void auide_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
168{
169 int mem_sttime = 0, mem_stcfg = au_readl(MEM_STCFG2);
170
171 switch (drive->dma_mode) {
172#ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
173 case XFER_MW_DMA_2:
174 mem_sttime = SBC_IDE_TIMING(MDMA2);
175
176
177 mem_stcfg &= ~TS_MASK;
178 mem_stcfg &= ~TCSOE_MASK;
179 mem_stcfg &= ~TOECS_MASK;
180 mem_stcfg |= SBC_IDE_MDMA2_TCSOE | SBC_IDE_MDMA2_TOECS;
181
182 break;
183 case XFER_MW_DMA_1:
184 mem_sttime = SBC_IDE_TIMING(MDMA1);
185
186
187 mem_stcfg &= ~TS_MASK;
188 mem_stcfg &= ~TCSOE_MASK;
189 mem_stcfg &= ~TOECS_MASK;
190 mem_stcfg |= SBC_IDE_MDMA1_TCSOE | SBC_IDE_MDMA1_TOECS;
191
192 break;
193 case XFER_MW_DMA_0:
194 mem_sttime = SBC_IDE_TIMING(MDMA0);
195
196
197 mem_stcfg |= TS_MASK;
198 mem_stcfg &= ~TCSOE_MASK;
199 mem_stcfg &= ~TOECS_MASK;
200 mem_stcfg |= SBC_IDE_MDMA0_TCSOE | SBC_IDE_MDMA0_TOECS;
201
202 break;
203#endif
204 }
205
206 au_writel(mem_sttime,MEM_STTIME2);
207 au_writel(mem_stcfg,MEM_STCFG2);
208}
209
210
211
212
213
214#ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
215static int auide_build_dmatable(ide_drive_t *drive, struct ide_cmd *cmd)
216{
217 ide_hwif_t *hwif = drive->hwif;
218 _auide_hwif *ahwif = &auide_hwif;
219 struct scatterlist *sg;
220 int i = cmd->sg_nents, count = 0;
221 int iswrite = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
222
223
224 ahwif->drive = drive;
225
226
227 sg = hwif->sg_table;
228 while (i && sg_dma_len(sg)) {
229 u32 cur_addr;
230 u32 cur_len;
231
232 cur_addr = sg_dma_address(sg);
233 cur_len = sg_dma_len(sg);
234
235 while (cur_len) {
236 u32 flags = DDMA_FLAGS_NOIE;
237 unsigned int tc = (cur_len < 0xfe00)? cur_len: 0xfe00;
238
239 if (++count >= PRD_ENTRIES) {
240 printk(KERN_WARNING "%s: DMA table too small\n",
241 drive->name);
242 return 0;
243 }
244
245
246 if (1==i)
247 flags = DDMA_FLAGS_IE;
248 else
249 flags = DDMA_FLAGS_NOIE;
250
251 if (iswrite) {
252 if (!au1xxx_dbdma_put_source(ahwif->tx_chan,
253 sg_phys(sg), tc, flags)) {
254 printk(KERN_ERR "%s failed %d\n",
255 __func__, __LINE__);
256 }
257 } else {
258 if (!au1xxx_dbdma_put_dest(ahwif->rx_chan,
259 sg_phys(sg), tc, flags)) {
260 printk(KERN_ERR "%s failed %d\n",
261 __func__, __LINE__);
262 }
263 }
264
265 cur_addr += tc;
266 cur_len -= tc;
267 }
268 sg = sg_next(sg);
269 i--;
270 }
271
272 if (count)
273 return 1;
274
275 return 0;
276}
277
278static int auide_dma_end(ide_drive_t *drive)
279{
280 return 0;
281}
282
283static void auide_dma_start(ide_drive_t *drive )
284{
285}
286
287
288static int auide_dma_setup(ide_drive_t *drive, struct ide_cmd *cmd)
289{
290 if (auide_build_dmatable(drive, cmd) == 0)
291 return 1;
292
293 return 0;
294}
295
296static int auide_dma_test_irq(ide_drive_t *drive)
297{
298
299
300
301 drive->waiting_for_dma++;
302 if (drive->waiting_for_dma >= DMA_WAIT_TIMEOUT) {
303 printk(KERN_WARNING "%s: timeout waiting for ddma to complete\n",
304 drive->name);
305 return 1;
306 }
307 udelay(10);
308 return 0;
309}
310
311static void auide_dma_host_set(ide_drive_t *drive, int on)
312{
313}
314
315static void auide_ddma_tx_callback(int irq, void *param)
316{
317}
318
319static void auide_ddma_rx_callback(int irq, void *param)
320{
321}
322#endif
323
324static void auide_init_dbdma_dev(dbdev_tab_t *dev, u32 dev_id, u32 tsize,
325 u32 devwidth, u32 flags, u32 regbase)
326{
327 dev->dev_id = dev_id;
328 dev->dev_physaddr = CPHYSADDR(regbase);
329 dev->dev_intlevel = 0;
330 dev->dev_intpolarity = 0;
331 dev->dev_tsize = tsize;
332 dev->dev_devwidth = devwidth;
333 dev->dev_flags = flags;
334}
335
336#ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
337static const struct ide_dma_ops au1xxx_dma_ops = {
338 .dma_host_set = auide_dma_host_set,
339 .dma_setup = auide_dma_setup,
340 .dma_start = auide_dma_start,
341 .dma_end = auide_dma_end,
342 .dma_test_irq = auide_dma_test_irq,
343 .dma_lost_irq = ide_dma_lost_irq,
344};
345
346static int auide_ddma_init(ide_hwif_t *hwif, const struct ide_port_info *d)
347{
348 _auide_hwif *auide = &auide_hwif;
349 dbdev_tab_t source_dev_tab, target_dev_tab;
350 u32 dev_id, tsize, devwidth, flags;
351
352 dev_id = hwif->ddma_id;
353
354 tsize = 8;
355 devwidth = 32;
356
357#ifdef IDE_AU1XXX_BURSTMODE
358 flags = DEV_FLAGS_SYNC | DEV_FLAGS_BURSTABLE;
359#else
360 flags = DEV_FLAGS_SYNC;
361#endif
362
363
364 auide_init_dbdma_dev(&source_dev_tab, dev_id, tsize, devwidth,
365 DEV_FLAGS_OUT | flags, auide->regbase);
366 auide->tx_dev_id = au1xxx_ddma_add_device( &source_dev_tab );
367
368 auide_init_dbdma_dev(&source_dev_tab, dev_id, tsize, devwidth,
369 DEV_FLAGS_IN | flags, auide->regbase);
370 auide->rx_dev_id = au1xxx_ddma_add_device( &source_dev_tab );
371
372
373 auide_init_dbdma_dev(&target_dev_tab, (u32)DSCR_CMD0_ALWAYS, tsize,
374 devwidth, DEV_FLAGS_ANYUSE, auide->regbase);
375 auide->target_dev_id = au1xxx_ddma_add_device(&target_dev_tab);
376
377
378 auide->tx_chan = au1xxx_dbdma_chan_alloc(auide->target_dev_id,
379 auide->tx_dev_id,
380 auide_ddma_tx_callback,
381 (void*)auide);
382
383
384 auide->rx_chan = au1xxx_dbdma_chan_alloc(auide->rx_dev_id,
385 auide->target_dev_id,
386 auide_ddma_rx_callback,
387 (void*)auide);
388
389 auide->tx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->tx_chan,
390 NUM_DESCRIPTORS);
391 auide->rx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->rx_chan,
392 NUM_DESCRIPTORS);
393
394
395 (void)ide_allocate_dma_engine(hwif);
396
397 au1xxx_dbdma_start( auide->tx_chan );
398 au1xxx_dbdma_start( auide->rx_chan );
399
400 return 0;
401}
402#else
403static int auide_ddma_init(ide_hwif_t *hwif, const struct ide_port_info *d)
404{
405 _auide_hwif *auide = &auide_hwif;
406 dbdev_tab_t source_dev_tab;
407 int flags;
408
409#ifdef IDE_AU1XXX_BURSTMODE
410 flags = DEV_FLAGS_SYNC | DEV_FLAGS_BURSTABLE;
411#else
412 flags = DEV_FLAGS_SYNC;
413#endif
414
415
416 auide_init_dbdma_dev(&source_dev_tab, (u32)DSCR_CMD0_ALWAYS, 8, 32,
417 DEV_FLAGS_OUT | flags, auide->regbase);
418 auide->tx_dev_id = au1xxx_ddma_add_device( &source_dev_tab );
419
420 auide_init_dbdma_dev(&source_dev_tab, (u32)DSCR_CMD0_ALWAYS, 8, 32,
421 DEV_FLAGS_IN | flags, auide->regbase);
422 auide->rx_dev_id = au1xxx_ddma_add_device( &source_dev_tab );
423
424
425 auide->tx_chan = au1xxx_dbdma_chan_alloc(DSCR_CMD0_ALWAYS,
426 auide->tx_dev_id,
427 NULL,
428 (void*)auide);
429
430
431 auide->rx_chan = au1xxx_dbdma_chan_alloc(auide->rx_dev_id,
432 DSCR_CMD0_ALWAYS,
433 NULL,
434 (void*)auide);
435
436 auide->tx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->tx_chan,
437 NUM_DESCRIPTORS);
438 auide->rx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->rx_chan,
439 NUM_DESCRIPTORS);
440
441 au1xxx_dbdma_start( auide->tx_chan );
442 au1xxx_dbdma_start( auide->rx_chan );
443
444 return 0;
445}
446#endif
447
448static void auide_setup_ports(struct ide_hw *hw, _auide_hwif *ahwif)
449{
450 int i;
451 unsigned long *ata_regs = hw->io_ports_array;
452
453
454 for (i = 0; i < 8; i++)
455 *ata_regs++ = ahwif->regbase + (i << IDE_REG_SHIFT);
456
457
458 *ata_regs = ahwif->regbase + (14 << IDE_REG_SHIFT);
459}
460
461#ifdef CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA
462static const struct ide_tp_ops au1xxx_tp_ops = {
463 .exec_command = ide_exec_command,
464 .read_status = ide_read_status,
465 .read_altstatus = ide_read_altstatus,
466 .write_devctl = ide_write_devctl,
467
468 .dev_select = ide_dev_select,
469 .tf_load = ide_tf_load,
470 .tf_read = ide_tf_read,
471
472 .input_data = au1xxx_input_data,
473 .output_data = au1xxx_output_data,
474};
475#endif
476
477static const struct ide_port_ops au1xxx_port_ops = {
478 .set_pio_mode = au1xxx_set_pio_mode,
479 .set_dma_mode = auide_set_dma_mode,
480};
481
482static const struct ide_port_info au1xxx_port_info = {
483 .init_dma = auide_ddma_init,
484#ifdef CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA
485 .tp_ops = &au1xxx_tp_ops,
486#endif
487 .port_ops = &au1xxx_port_ops,
488#ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
489 .dma_ops = &au1xxx_dma_ops,
490#endif
491 .host_flags = IDE_HFLAG_POST_SET_MODE |
492 IDE_HFLAG_NO_IO_32BIT |
493 IDE_HFLAG_UNMASK_IRQS,
494 .pio_mask = ATA_PIO4,
495#ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
496 .mwdma_mask = ATA_MWDMA2,
497#endif
498 .chipset = ide_au1xxx,
499};
500
501static int au_ide_probe(struct platform_device *dev)
502{
503 _auide_hwif *ahwif = &auide_hwif;
504 struct resource *res;
505 struct ide_host *host;
506 int ret = 0;
507 struct ide_hw hw, *hws[] = { &hw };
508
509#if defined(CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA)
510 char *mode = "MWDMA2";
511#elif defined(CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA)
512 char *mode = "PIO+DDMA(offload)";
513#endif
514
515 memset(&auide_hwif, 0, sizeof(_auide_hwif));
516 ahwif->irq = platform_get_irq(dev, 0);
517
518 res = platform_get_resource(dev, IORESOURCE_MEM, 0);
519
520 if (res == NULL) {
521 pr_debug("%s %d: no base address\n", DRV_NAME, dev->id);
522 ret = -ENODEV;
523 goto out;
524 }
525 if (ahwif->irq < 0) {
526 pr_debug("%s %d: no IRQ\n", DRV_NAME, dev->id);
527 ret = -ENODEV;
528 goto out;
529 }
530
531 if (!request_mem_region(res->start, resource_size(res), dev->name)) {
532 pr_debug("%s: request_mem_region failed\n", DRV_NAME);
533 ret = -EBUSY;
534 goto out;
535 }
536
537 ahwif->regbase = (u32)ioremap(res->start, resource_size(res));
538 if (ahwif->regbase == 0) {
539 ret = -ENOMEM;
540 goto out;
541 }
542
543 res = platform_get_resource(dev, IORESOURCE_DMA, 0);
544 if (!res) {
545 pr_debug("%s: no DDMA ID resource\n", DRV_NAME);
546 ret = -ENODEV;
547 goto out;
548 }
549 ahwif->ddma_id = res->start;
550
551 memset(&hw, 0, sizeof(hw));
552 auide_setup_ports(&hw, ahwif);
553 hw.irq = ahwif->irq;
554 hw.dev = &dev->dev;
555
556 ret = ide_host_add(&au1xxx_port_info, hws, 1, &host);
557 if (ret)
558 goto out;
559
560 auide_hwif.hwif = host->ports[0];
561
562 platform_set_drvdata(dev, host);
563
564 printk(KERN_INFO "Au1xxx IDE(builtin) configured for %s\n", mode );
565
566 out:
567 return ret;
568}
569
570static int au_ide_remove(struct platform_device *dev)
571{
572 struct resource *res;
573 struct ide_host *host = platform_get_drvdata(dev);
574 _auide_hwif *ahwif = &auide_hwif;
575
576 ide_host_remove(host);
577
578 iounmap((void *)ahwif->regbase);
579
580 res = platform_get_resource(dev, IORESOURCE_MEM, 0);
581 release_mem_region(res->start, resource_size(res));
582
583 return 0;
584}
585
586static struct platform_driver au1200_ide_driver = {
587 .driver = {
588 .name = "au1200-ide",
589 .owner = THIS_MODULE,
590 },
591 .probe = au_ide_probe,
592 .remove = au_ide_remove,
593};
594
595static int __init au_ide_init(void)
596{
597 return platform_driver_register(&au1200_ide_driver);
598}
599
600static void __exit au_ide_exit(void)
601{
602 platform_driver_unregister(&au1200_ide_driver);
603}
604
605MODULE_LICENSE("GPL");
606MODULE_DESCRIPTION("AU1200 IDE driver");
607
608module_init(au_ide_init);
609module_exit(au_ide_exit);
610
