dt-bindings: mtd: ingenic: Use standard ecc-engine property
[linux/fpc-iii.git] / drivers / ide / au1xxx-ide.c
blob4d181a918d72907ae9e08700b68e8b0859d7727e
1 /*
2 * BRIEF MODULE DESCRIPTION
3 * AMD Alchemy Au1xxx IDE interface routines over the Static Bus
5 * Copyright (c) 2003-2005 AMD, Personal Connectivity Solutions
7 * This program is free software; you can redistribute it and/or modify it under
8 * the terms of the GNU General Public License as published by the Free Software
9 * Foundation; either version 2 of the License, or (at your option) any later
10 * version.
12 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
13 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
14 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR
15 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
16 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
17 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
18 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
19 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
20 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
21 * POSSIBILITY OF SUCH DAMAGE.
23 * You should have received a copy of the GNU General Public License along with
24 * this program; if not, write to the Free Software Foundation, Inc.,
25 * 675 Mass Ave, Cambridge, MA 02139, USA.
27 * Note: for more information, please refer "AMD Alchemy Au1200/Au1550 IDE
28 * Interface and Linux Device Driver" Application Note.
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>
39 #include <asm/mach-au1x00/au1000.h>
40 #include <asm/mach-au1x00/au1xxx_dbdma.h>
41 #include <asm/mach-au1x00/au1xxx_ide.h>
43 #define DRV_NAME "au1200-ide"
44 #define DRV_AUTHOR "Enrico Walther <enrico.walther@amd.com> / Pete Popov <ppopov@embeddedalley.com>"
46 #ifndef IDE_REG_SHIFT
47 #define IDE_REG_SHIFT 5
48 #endif
50 /* enable the burstmode in the dbdma */
51 #define IDE_AU1XXX_BURSTMODE 1
53 static _auide_hwif auide_hwif;
55 #if defined(CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA)
57 static inline void auide_insw(unsigned long port, void *addr, u32 count)
59 _auide_hwif *ahwif = &auide_hwif;
60 chan_tab_t *ctp;
61 au1x_ddma_desc_t *dp;
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;
68 ctp = *((chan_tab_t **)ahwif->rx_chan);
69 dp = ctp->cur_ptr;
70 while (dp->dscr_cmd0 & DSCR_CMD0_V)
72 ctp->cur_ptr = au1xxx_ddma_get_nextptr_virt(dp);
75 static inline void auide_outsw(unsigned long port, void *addr, u32 count)
77 _auide_hwif *ahwif = &auide_hwif;
78 chan_tab_t *ctp;
79 au1x_ddma_desc_t *dp;
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;
86 ctp = *((chan_tab_t **)ahwif->tx_chan);
87 dp = ctp->cur_ptr;
88 while (dp->dscr_cmd0 & DSCR_CMD0_V)
90 ctp->cur_ptr = au1xxx_ddma_get_nextptr_virt(dp);
93 static void au1xxx_input_data(ide_drive_t *drive, struct ide_cmd *cmd,
94 void *buf, unsigned int len)
96 auide_insw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
99 static void au1xxx_output_data(ide_drive_t *drive, struct ide_cmd *cmd,
100 void *buf, unsigned int len)
102 auide_outsw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
104 #endif
106 static void au1xxx_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
108 int mem_sttime = 0, mem_stcfg = au_readl(MEM_STCFG2);
110 switch (drive->pio_mode - XFER_PIO_0) {
111 case 0:
112 mem_sttime = SBC_IDE_TIMING(PIO0);
114 /* set configuration for RCS2# */
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;
121 case 1:
122 mem_sttime = SBC_IDE_TIMING(PIO1);
124 /* set configuration for RCS2# */
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;
131 case 2:
132 mem_sttime = SBC_IDE_TIMING(PIO2);
134 /* set configuration for RCS2# */
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;
141 case 3:
142 mem_sttime = SBC_IDE_TIMING(PIO3);
144 /* set configuration for RCS2# */
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;
150 break;
152 case 4:
153 mem_sttime = SBC_IDE_TIMING(PIO4);
155 /* set configuration for RCS2# */
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;
163 au_writel(mem_sttime,MEM_STTIME2);
164 au_writel(mem_stcfg,MEM_STCFG2);
167 static void auide_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
169 int mem_sttime = 0, mem_stcfg = au_readl(MEM_STCFG2);
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);
176 /* set configuration for RCS2# */
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;
182 break;
183 case XFER_MW_DMA_1:
184 mem_sttime = SBC_IDE_TIMING(MDMA1);
186 /* set configuration for RCS2# */
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;
192 break;
193 case XFER_MW_DMA_0:
194 mem_sttime = SBC_IDE_TIMING(MDMA0);
196 /* set configuration for RCS2# */
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;
202 break;
203 #endif
206 au_writel(mem_sttime,MEM_STTIME2);
207 au_writel(mem_stcfg,MEM_STCFG2);
211 * Multi-Word DMA + DbDMA functions
214 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
215 static int auide_build_dmatable(ide_drive_t *drive, struct ide_cmd *cmd)
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);
223 /* Save for interrupt context */
224 ahwif->drive = drive;
226 /* fill the descriptors */
227 sg = hwif->sg_table;
228 while (i && sg_dma_len(sg)) {
229 u32 cur_addr;
230 u32 cur_len;
232 cur_addr = sg_dma_address(sg);
233 cur_len = sg_dma_len(sg);
235 while (cur_len) {
236 u32 flags = DDMA_FLAGS_NOIE;
237 unsigned int tc = (cur_len < 0xfe00)? cur_len: 0xfe00;
239 if (++count >= PRD_ENTRIES) {
240 printk(KERN_WARNING "%s: DMA table too small\n",
241 drive->name);
242 return 0;
245 /* Lets enable intr for the last descriptor only */
246 if (1==i)
247 flags = DDMA_FLAGS_IE;
248 else
249 flags = DDMA_FLAGS_NOIE;
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__);
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__);
265 cur_addr += tc;
266 cur_len -= tc;
268 sg = sg_next(sg);
269 i--;
272 if (count)
273 return 1;
275 return 0; /* revert to PIO for this request */
278 static int auide_dma_end(ide_drive_t *drive)
280 return 0;
283 static void auide_dma_start(ide_drive_t *drive )
288 static int auide_dma_setup(ide_drive_t *drive, struct ide_cmd *cmd)
290 if (auide_build_dmatable(drive, cmd) == 0)
291 return 1;
293 return 0;
296 static int auide_dma_test_irq(ide_drive_t *drive)
298 /* If dbdma didn't execute the STOP command yet, the
299 * active bit is still set
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;
307 udelay(10);
308 return 0;
311 static void auide_dma_host_set(ide_drive_t *drive, int on)
315 static void auide_ddma_tx_callback(int irq, void *param)
319 static void auide_ddma_rx_callback(int irq, void *param)
322 #endif /* end CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA */
324 static void auide_init_dbdma_dev(dbdev_tab_t *dev, u32 dev_id, u32 tsize,
325 u32 devwidth, u32 flags, u32 regbase)
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;
336 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
337 static 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,
346 static int auide_ddma_init(ide_hwif_t *hwif, const struct ide_port_info *d)
348 _auide_hwif *auide = &auide_hwif;
349 dbdev_tab_t source_dev_tab, target_dev_tab;
350 u32 dev_id, tsize, devwidth, flags;
352 dev_id = hwif->ddma_id;
354 tsize = 8; /* 1 */
355 devwidth = 32; /* 16 */
357 #ifdef IDE_AU1XXX_BURSTMODE
358 flags = DEV_FLAGS_SYNC | DEV_FLAGS_BURSTABLE;
359 #else
360 flags = DEV_FLAGS_SYNC;
361 #endif
363 /* setup dev_tab for tx channel */
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 );
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 );
372 /* We also need to add a target device for the DMA */
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);
377 /* Get a channel for TX */
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);
383 /* Get a channel for RX */
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);
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);
394 /* FIXME: check return value */
395 (void)ide_allocate_dma_engine(hwif);
397 au1xxx_dbdma_start( auide->tx_chan );
398 au1xxx_dbdma_start( auide->rx_chan );
400 return 0;
402 #else
403 static int auide_ddma_init(ide_hwif_t *hwif, const struct ide_port_info *d)
405 _auide_hwif *auide = &auide_hwif;
406 dbdev_tab_t source_dev_tab;
407 int flags;
409 #ifdef IDE_AU1XXX_BURSTMODE
410 flags = DEV_FLAGS_SYNC | DEV_FLAGS_BURSTABLE;
411 #else
412 flags = DEV_FLAGS_SYNC;
413 #endif
415 /* setup dev_tab for tx channel */
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 );
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 );
424 /* Get a channel for TX */
425 auide->tx_chan = au1xxx_dbdma_chan_alloc(DSCR_CMD0_ALWAYS,
426 auide->tx_dev_id,
427 NULL,
428 (void*)auide);
430 /* Get a channel for RX */
431 auide->rx_chan = au1xxx_dbdma_chan_alloc(auide->rx_dev_id,
432 DSCR_CMD0_ALWAYS,
433 NULL,
434 (void*)auide);
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);
441 au1xxx_dbdma_start( auide->tx_chan );
442 au1xxx_dbdma_start( auide->rx_chan );
444 return 0;
446 #endif
448 static void auide_setup_ports(struct ide_hw *hw, _auide_hwif *ahwif)
450 int i;
451 unsigned long *ata_regs = hw->io_ports_array;
453 /* FIXME? */
454 for (i = 0; i < 8; i++)
455 *ata_regs++ = ahwif->regbase + (i << IDE_REG_SHIFT);
457 /* set the Alternative Status register */
458 *ata_regs = ahwif->regbase + (14 << IDE_REG_SHIFT);
461 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA
462 static 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,
468 .dev_select = ide_dev_select,
469 .tf_load = ide_tf_load,
470 .tf_read = ide_tf_read,
472 .input_data = au1xxx_input_data,
473 .output_data = au1xxx_output_data,
475 #endif
477 static const struct ide_port_ops au1xxx_port_ops = {
478 .set_pio_mode = au1xxx_set_pio_mode,
479 .set_dma_mode = auide_set_dma_mode,
482 static 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,
501 static int au_ide_probe(struct platform_device *dev)
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 };
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
515 memset(&auide_hwif, 0, sizeof(_auide_hwif));
516 ahwif->irq = platform_get_irq(dev, 0);
518 res = platform_get_resource(dev, IORESOURCE_MEM, 0);
520 if (res == NULL) {
521 pr_debug("%s %d: no base address\n", DRV_NAME, dev->id);
522 ret = -ENODEV;
523 goto out;
525 if (ahwif->irq < 0) {
526 pr_debug("%s %d: no IRQ\n", DRV_NAME, dev->id);
527 ret = -ENODEV;
528 goto out;
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;
537 ahwif->regbase = (u32)ioremap(res->start, resource_size(res));
538 if (ahwif->regbase == 0) {
539 ret = -ENOMEM;
540 goto out;
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;
549 ahwif->ddma_id = res->start;
551 memset(&hw, 0, sizeof(hw));
552 auide_setup_ports(&hw, ahwif);
553 hw.irq = ahwif->irq;
554 hw.dev = &dev->dev;
556 ret = ide_host_add(&au1xxx_port_info, hws, 1, &host);
557 if (ret)
558 goto out;
560 auide_hwif.hwif = host->ports[0];
562 platform_set_drvdata(dev, host);
564 printk(KERN_INFO "Au1xxx IDE(builtin) configured for %s\n", mode );
566 out:
567 return ret;
570 static int au_ide_remove(struct platform_device *dev)
572 struct resource *res;
573 struct ide_host *host = platform_get_drvdata(dev);
574 _auide_hwif *ahwif = &auide_hwif;
576 ide_host_remove(host);
578 iounmap((void *)ahwif->regbase);
580 res = platform_get_resource(dev, IORESOURCE_MEM, 0);
581 release_mem_region(res->start, resource_size(res));
583 return 0;
586 static struct platform_driver au1200_ide_driver = {
587 .driver = {
588 .name = "au1200-ide",
590 .probe = au_ide_probe,
591 .remove = au_ide_remove,
594 module_platform_driver(au1200_ide_driver);
596 MODULE_LICENSE("GPL");
597 MODULE_DESCRIPTION("AU1200 IDE driver");