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
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/au1xxx.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 /* enable the burstmode in the dbdma */
47 #define IDE_AU1XXX_BURSTMODE 1
49 static _auide_hwif auide_hwif;
51 #if defined(CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA)
53 void auide_insw(unsigned long port, void *addr, u32 count)
55 _auide_hwif *ahwif = &auide_hwif;
59 if(!put_dest_flags(ahwif->rx_chan, (void*)addr, count << 1,
61 printk(KERN_ERR "%s failed %d\n", __func__, __LINE__);
64 ctp = *((chan_tab_t **)ahwif->rx_chan);
66 while (dp->dscr_cmd0 & DSCR_CMD0_V)
68 ctp->cur_ptr = au1xxx_ddma_get_nextptr_virt(dp);
71 void auide_outsw(unsigned long port, void *addr, u32 count)
73 _auide_hwif *ahwif = &auide_hwif;
77 if(!put_source_flags(ahwif->tx_chan, (void*)addr,
78 count << 1, DDMA_FLAGS_NOIE)) {
79 printk(KERN_ERR "%s failed %d\n", __func__, __LINE__);
82 ctp = *((chan_tab_t **)ahwif->tx_chan);
84 while (dp->dscr_cmd0 & DSCR_CMD0_V)
86 ctp->cur_ptr = au1xxx_ddma_get_nextptr_virt(dp);
89 static void au1xxx_input_data(ide_drive_t *drive, struct request *rq,
90 void *buf, unsigned int len)
92 auide_insw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
95 static void au1xxx_output_data(ide_drive_t *drive, struct request *rq,
96 void *buf, unsigned int len)
98 auide_outsw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
102 static void au1xxx_set_pio_mode(ide_drive_t *drive, const u8 pio)
104 int mem_sttime = 0, mem_stcfg = au_readl(MEM_STCFG2);
109 mem_sttime = SBC_IDE_TIMING(PIO0);
111 /* set configuration for RCS2# */
112 mem_stcfg |= TS_MASK;
113 mem_stcfg &= ~TCSOE_MASK;
114 mem_stcfg &= ~TOECS_MASK;
115 mem_stcfg |= SBC_IDE_PIO0_TCSOE | SBC_IDE_PIO0_TOECS;
119 mem_sttime = SBC_IDE_TIMING(PIO1);
121 /* set configuration for RCS2# */
122 mem_stcfg |= TS_MASK;
123 mem_stcfg &= ~TCSOE_MASK;
124 mem_stcfg &= ~TOECS_MASK;
125 mem_stcfg |= SBC_IDE_PIO1_TCSOE | SBC_IDE_PIO1_TOECS;
129 mem_sttime = SBC_IDE_TIMING(PIO2);
131 /* set configuration for RCS2# */
132 mem_stcfg &= ~TS_MASK;
133 mem_stcfg &= ~TCSOE_MASK;
134 mem_stcfg &= ~TOECS_MASK;
135 mem_stcfg |= SBC_IDE_PIO2_TCSOE | SBC_IDE_PIO2_TOECS;
139 mem_sttime = SBC_IDE_TIMING(PIO3);
141 /* set configuration for RCS2# */
142 mem_stcfg &= ~TS_MASK;
143 mem_stcfg &= ~TCSOE_MASK;
144 mem_stcfg &= ~TOECS_MASK;
145 mem_stcfg |= SBC_IDE_PIO3_TCSOE | SBC_IDE_PIO3_TOECS;
150 mem_sttime = SBC_IDE_TIMING(PIO4);
152 /* set configuration for RCS2# */
153 mem_stcfg &= ~TS_MASK;
154 mem_stcfg &= ~TCSOE_MASK;
155 mem_stcfg &= ~TOECS_MASK;
156 mem_stcfg |= SBC_IDE_PIO4_TCSOE | SBC_IDE_PIO4_TOECS;
160 au_writel(mem_sttime,MEM_STTIME2);
161 au_writel(mem_stcfg,MEM_STCFG2);
164 static void auide_set_dma_mode(ide_drive_t *drive, const u8 speed)
166 int mem_sttime = 0, mem_stcfg = au_readl(MEM_STCFG2);
169 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
171 mem_sttime = SBC_IDE_TIMING(MDMA2);
173 /* set configuration for RCS2# */
174 mem_stcfg &= ~TS_MASK;
175 mem_stcfg &= ~TCSOE_MASK;
176 mem_stcfg &= ~TOECS_MASK;
177 mem_stcfg |= SBC_IDE_MDMA2_TCSOE | SBC_IDE_MDMA2_TOECS;
181 mem_sttime = SBC_IDE_TIMING(MDMA1);
183 /* set configuration for RCS2# */
184 mem_stcfg &= ~TS_MASK;
185 mem_stcfg &= ~TCSOE_MASK;
186 mem_stcfg &= ~TOECS_MASK;
187 mem_stcfg |= SBC_IDE_MDMA1_TCSOE | SBC_IDE_MDMA1_TOECS;
191 mem_sttime = SBC_IDE_TIMING(MDMA0);
193 /* set configuration for RCS2# */
194 mem_stcfg |= TS_MASK;
195 mem_stcfg &= ~TCSOE_MASK;
196 mem_stcfg &= ~TOECS_MASK;
197 mem_stcfg |= SBC_IDE_MDMA0_TCSOE | SBC_IDE_MDMA0_TOECS;
203 au_writel(mem_sttime,MEM_STTIME2);
204 au_writel(mem_stcfg,MEM_STCFG2);
208 * Multi-Word DMA + DbDMA functions
211 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
212 static int auide_build_dmatable(ide_drive_t *drive)
214 int i, iswrite, count = 0;
215 ide_hwif_t *hwif = drive->hwif;
216 struct request *rq = hwif->rq;
217 _auide_hwif *ahwif = &auide_hwif;
218 struct scatterlist *sg;
220 iswrite = (rq_data_dir(rq) == WRITE);
221 /* Save for interrupt context */
222 ahwif->drive = drive;
224 hwif->sg_nents = i = ide_build_sglist(drive, rq);
229 /* fill the descriptors */
231 while (i && sg_dma_len(sg)) {
235 cur_addr = sg_dma_address(sg);
236 cur_len = sg_dma_len(sg);
239 u32 flags = DDMA_FLAGS_NOIE;
240 unsigned int tc = (cur_len < 0xfe00)? cur_len: 0xfe00;
242 if (++count >= PRD_ENTRIES) {
243 printk(KERN_WARNING "%s: DMA table too small\n",
245 goto use_pio_instead;
248 /* Lets enable intr for the last descriptor only */
250 flags = DDMA_FLAGS_IE;
252 flags = DDMA_FLAGS_NOIE;
255 if(!put_source_flags(ahwif->tx_chan,
258 printk(KERN_ERR "%s failed %d\n",
263 if(!put_dest_flags(ahwif->rx_chan,
266 printk(KERN_ERR "%s failed %d\n",
282 ide_destroy_dmatable(drive);
284 return 0; /* revert to PIO for this request */
287 static int auide_dma_end(ide_drive_t *drive)
289 ide_destroy_dmatable(drive);
294 static void auide_dma_start(ide_drive_t *drive )
299 static void auide_dma_exec_cmd(ide_drive_t *drive, u8 command)
301 /* issue cmd to drive */
302 ide_execute_command(drive, command, &ide_dma_intr,
306 static int auide_dma_setup(ide_drive_t *drive)
308 struct request *rq = drive->hwif->rq;
310 if (!auide_build_dmatable(drive)) {
311 ide_map_sg(drive, rq);
315 drive->waiting_for_dma = 1;
319 static int auide_dma_test_irq(ide_drive_t *drive)
321 /* If dbdma didn't execute the STOP command yet, the
322 * active bit is still set
324 drive->waiting_for_dma++;
325 if (drive->waiting_for_dma >= DMA_WAIT_TIMEOUT) {
326 printk(KERN_WARNING "%s: timeout waiting for ddma to \
327 complete\n", drive->name);
334 static void auide_dma_host_set(ide_drive_t *drive, int on)
338 static void auide_ddma_tx_callback(int irq, void *param)
340 _auide_hwif *ahwif = (_auide_hwif*)param;
341 ahwif->drive->waiting_for_dma = 0;
344 static void auide_ddma_rx_callback(int irq, void *param)
346 _auide_hwif *ahwif = (_auide_hwif*)param;
347 ahwif->drive->waiting_for_dma = 0;
350 #endif /* end CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA */
352 static void auide_init_dbdma_dev(dbdev_tab_t *dev, u32 dev_id, u32 tsize, u32 devwidth, u32 flags)
354 dev->dev_id = dev_id;
355 dev->dev_physaddr = (u32)IDE_PHYS_ADDR;
356 dev->dev_intlevel = 0;
357 dev->dev_intpolarity = 0;
358 dev->dev_tsize = tsize;
359 dev->dev_devwidth = devwidth;
360 dev->dev_flags = flags;
363 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
364 static const struct ide_dma_ops au1xxx_dma_ops = {
365 .dma_host_set = auide_dma_host_set,
366 .dma_setup = auide_dma_setup,
367 .dma_exec_cmd = auide_dma_exec_cmd,
368 .dma_start = auide_dma_start,
369 .dma_end = auide_dma_end,
370 .dma_test_irq = auide_dma_test_irq,
371 .dma_lost_irq = ide_dma_lost_irq,
372 .dma_timeout = ide_dma_timeout,
375 static int auide_ddma_init(ide_hwif_t *hwif, const struct ide_port_info *d)
377 _auide_hwif *auide = &auide_hwif;
378 dbdev_tab_t source_dev_tab, target_dev_tab;
379 u32 dev_id, tsize, devwidth, flags;
381 dev_id = IDE_DDMA_REQ;
384 devwidth = 32; /* 16 */
386 #ifdef IDE_AU1XXX_BURSTMODE
387 flags = DEV_FLAGS_SYNC | DEV_FLAGS_BURSTABLE;
389 flags = DEV_FLAGS_SYNC;
392 /* setup dev_tab for tx channel */
393 auide_init_dbdma_dev( &source_dev_tab,
395 tsize, devwidth, DEV_FLAGS_OUT | flags);
396 auide->tx_dev_id = au1xxx_ddma_add_device( &source_dev_tab );
398 auide_init_dbdma_dev( &source_dev_tab,
400 tsize, devwidth, DEV_FLAGS_IN | flags);
401 auide->rx_dev_id = au1xxx_ddma_add_device( &source_dev_tab );
403 /* We also need to add a target device for the DMA */
404 auide_init_dbdma_dev( &target_dev_tab,
405 (u32)DSCR_CMD0_ALWAYS,
406 tsize, devwidth, DEV_FLAGS_ANYUSE);
407 auide->target_dev_id = au1xxx_ddma_add_device(&target_dev_tab);
409 /* Get a channel for TX */
410 auide->tx_chan = au1xxx_dbdma_chan_alloc(auide->target_dev_id,
412 auide_ddma_tx_callback,
415 /* Get a channel for RX */
416 auide->rx_chan = au1xxx_dbdma_chan_alloc(auide->rx_dev_id,
417 auide->target_dev_id,
418 auide_ddma_rx_callback,
421 auide->tx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->tx_chan,
423 auide->rx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->rx_chan,
426 /* FIXME: check return value */
427 (void)ide_allocate_dma_engine(hwif);
429 au1xxx_dbdma_start( auide->tx_chan );
430 au1xxx_dbdma_start( auide->rx_chan );
435 static int auide_ddma_init(ide_hwif_t *hwif, const struct ide_port_info *d)
437 _auide_hwif *auide = &auide_hwif;
438 dbdev_tab_t source_dev_tab;
441 #ifdef IDE_AU1XXX_BURSTMODE
442 flags = DEV_FLAGS_SYNC | DEV_FLAGS_BURSTABLE;
444 flags = DEV_FLAGS_SYNC;
447 /* setup dev_tab for tx channel */
448 auide_init_dbdma_dev( &source_dev_tab,
449 (u32)DSCR_CMD0_ALWAYS,
450 8, 32, DEV_FLAGS_OUT | flags);
451 auide->tx_dev_id = au1xxx_ddma_add_device( &source_dev_tab );
453 auide_init_dbdma_dev( &source_dev_tab,
454 (u32)DSCR_CMD0_ALWAYS,
455 8, 32, DEV_FLAGS_IN | flags);
456 auide->rx_dev_id = au1xxx_ddma_add_device( &source_dev_tab );
458 /* Get a channel for TX */
459 auide->tx_chan = au1xxx_dbdma_chan_alloc(DSCR_CMD0_ALWAYS,
464 /* Get a channel for RX */
465 auide->rx_chan = au1xxx_dbdma_chan_alloc(auide->rx_dev_id,
470 auide->tx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->tx_chan,
472 auide->rx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->rx_chan,
475 au1xxx_dbdma_start( auide->tx_chan );
476 au1xxx_dbdma_start( auide->rx_chan );
482 static void auide_setup_ports(hw_regs_t *hw, _auide_hwif *ahwif)
485 unsigned long *ata_regs = hw->io_ports_array;
488 for (i = 0; i < 8; i++)
489 *ata_regs++ = ahwif->regbase + (i << IDE_REG_SHIFT);
491 /* set the Alternative Status register */
492 *ata_regs = ahwif->regbase + (14 << IDE_REG_SHIFT);
495 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA
496 static const struct ide_tp_ops au1xxx_tp_ops = {
497 .exec_command = ide_exec_command,
498 .read_status = ide_read_status,
499 .read_altstatus = ide_read_altstatus,
501 .set_irq = ide_set_irq,
503 .tf_load = ide_tf_load,
504 .tf_read = ide_tf_read,
506 .input_data = au1xxx_input_data,
507 .output_data = au1xxx_output_data,
511 static const struct ide_port_ops au1xxx_port_ops = {
512 .set_pio_mode = au1xxx_set_pio_mode,
513 .set_dma_mode = auide_set_dma_mode,
516 static const struct ide_port_info au1xxx_port_info = {
517 .init_dma = auide_ddma_init,
518 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA
519 .tp_ops = &au1xxx_tp_ops,
521 .port_ops = &au1xxx_port_ops,
522 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
523 .dma_ops = &au1xxx_dma_ops,
525 .host_flags = IDE_HFLAG_POST_SET_MODE |
526 IDE_HFLAG_NO_IO_32BIT |
527 IDE_HFLAG_UNMASK_IRQS,
528 .pio_mask = ATA_PIO4,
529 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
530 .mwdma_mask = ATA_MWDMA2,
534 static int au_ide_probe(struct platform_device *dev)
536 _auide_hwif *ahwif = &auide_hwif;
537 struct resource *res;
538 struct ide_host *host;
540 hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
542 #if defined(CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA)
543 char *mode = "MWDMA2";
544 #elif defined(CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA)
545 char *mode = "PIO+DDMA(offload)";
548 memset(&auide_hwif, 0, sizeof(_auide_hwif));
549 ahwif->irq = platform_get_irq(dev, 0);
551 res = platform_get_resource(dev, IORESOURCE_MEM, 0);
554 pr_debug("%s %d: no base address\n", DRV_NAME, dev->id);
558 if (ahwif->irq < 0) {
559 pr_debug("%s %d: no IRQ\n", DRV_NAME, dev->id);
564 if (!request_mem_region(res->start, res->end - res->start + 1,
566 pr_debug("%s: request_mem_region failed\n", DRV_NAME);
571 ahwif->regbase = (u32)ioremap(res->start, res->end - res->start + 1);
572 if (ahwif->regbase == 0) {
577 memset(&hw, 0, sizeof(hw));
578 auide_setup_ports(&hw, ahwif);
581 hw.chipset = ide_au1xxx;
583 ret = ide_host_add(&au1xxx_port_info, hws, &host);
587 auide_hwif.hwif = host->ports[0];
589 platform_set_drvdata(dev, host);
591 printk(KERN_INFO "Au1xxx IDE(builtin) configured for %s\n", mode );
597 static int au_ide_remove(struct platform_device *dev)
599 struct resource *res;
600 struct ide_host *host = platform_get_drvdata(dev);
601 _auide_hwif *ahwif = &auide_hwif;
603 ide_host_remove(host);
605 iounmap((void *)ahwif->regbase);
607 res = platform_get_resource(dev, IORESOURCE_MEM, 0);
608 release_mem_region(res->start, res->end - res->start + 1);
613 static struct platform_driver au1200_ide_driver = {
615 .name = "au1200-ide",
616 .owner = THIS_MODULE,
618 .probe = au_ide_probe,
619 .remove = au_ide_remove,
622 static int __init au_ide_init(void)
624 return platform_driver_register(&au1200_ide_driver);
627 static void __exit au_ide_exit(void)
629 platform_driver_unregister(&au1200_ide_driver);
632 MODULE_LICENSE("GPL");
633 MODULE_DESCRIPTION("AU1200 IDE driver");
635 module_init(au_ide_init);
636 module_exit(au_ide_exit);