2 * Driver for Blackfin on-chip ATAPI controller.
4 * Enter bugs at http://blackfin.uclinux.org/
6 * Copyright (c) 2008 Analog Devices Inc.
8 * Licensed under the GPL-2 or later.
14 #include <asm/byteorder.h>
15 #include <asm/clock.h>
17 #include <asm/errno.h>
18 #include <asm/portmux.h>
19 #include <asm/mach-common/bits/pata.h>
23 #include "pata_bfin.h"
25 static struct ata_port port[CONFIG_SYS_SATA_MAX_DEVICE];
28 * PIO Mode - Frequency compatibility
31 static const u32 pio_fsclk[] =
32 { 33333333, 33333333, 33333333, 33333333, 33333333 };
35 * MDMA Mode - Frequency compatibility
38 static const u32 mdma_fsclk[] = { 33333333, 33333333, 33333333 };
41 * UDMA Mode - Frequency compatibility
43 * UDMA5 - 100 MB/s - SCLK = 133 MHz
44 * UDMA4 - 66 MB/s - SCLK >= 80 MHz
45 * UDMA3 - 44.4 MB/s - SCLK >= 50 MHz
46 * UDMA2 - 33 MB/s - SCLK >= 40 MHz
48 /* mode: 0 1 2 3 4 5 */
49 static const u32 udma_fsclk[] =
50 { 33333333, 33333333, 40000000, 50000000, 80000000, 133333333 };
53 * Register transfer timing table
57 static const u32 reg_t0min[] = { 600, 383, 330, 180, 120 };
58 /* DIOR/DIOW to end cycle */
59 static const u32 reg_t2min[] = { 290, 290, 290, 70, 25 };
60 /* DIOR/DIOW asserted pulse width */
61 static const u32 reg_teocmin[] = { 290, 290, 290, 80, 70 };
68 static const u32 pio_t0min[] = { 600, 383, 240, 180, 120 };
69 /* Address valid to DIOR/DIORW */
70 static const u32 pio_t1min[] = { 70, 50, 30, 30, 25 };
71 /* DIOR/DIOW to end cycle */
72 static const u32 pio_t2min[] = { 165, 125, 100, 80, 70 };
73 /* DIOR/DIOW asserted pulse width */
74 static const u32 pio_teocmin[] = { 165, 125, 100, 70, 25 };
76 static const u32 pio_t4min[] = { 30, 20, 15, 10, 10 };
78 /* ******************************************************************
79 * Multiword DMA timing table
80 * ******************************************************************
84 static const u32 mdma_t0min[] = { 480, 150, 120 };
85 /* DIOR/DIOW asserted pulse width */
86 static const u32 mdma_tdmin[] = { 215, 80, 70 };
87 /* DMACK to read data released */
88 static const u32 mdma_thmin[] = { 20, 15, 10 };
89 /* DIOR/DIOW to DMACK hold */
90 static const u32 mdma_tjmin[] = { 20, 5, 5 };
91 /* DIOR negated pulse width */
92 static const u32 mdma_tkrmin[] = { 50, 50, 25 };
93 /* DIOR negated pulse width */
94 static const u32 mdma_tkwmin[] = { 215, 50, 25 };
95 /* CS[1:0] valid to DIOR/DIOW */
96 static const u32 mdma_tmmin[] = { 50, 30, 25 };
97 /* DMACK to read data released */
98 static const u32 mdma_tzmax[] = { 20, 25, 25 };
101 * Ultra DMA timing table
103 /* mode: 0 1 2 3 4 5 */
104 static const u32 udma_tcycmin[] = { 112, 73, 54, 39, 25, 17 };
105 static const u32 udma_tdvsmin[] = { 70, 48, 31, 20, 7, 5 };
106 static const u32 udma_tenvmax[] = { 70, 70, 70, 55, 55, 50 };
107 static const u32 udma_trpmin[] = { 160, 125, 100, 100, 100, 85 };
108 static const u32 udma_tmin[] = { 5, 5, 5, 5, 3, 3 };
111 static const u32 udma_tmlimin = 20;
112 static const u32 udma_tzahmin = 20;
113 static const u32 udma_tenvmin = 20;
114 static const u32 udma_tackmin = 20;
115 static const u32 udma_tssmin = 50;
117 static void msleep(int count)
121 for (i = 0; i < count; i++)
127 * Function: num_clocks_min
130 * calculate number of SCLK cycles to meet minimum timing
132 static unsigned short num_clocks_min(unsigned long tmin,
136 unsigned short result;
138 tmp = tmin * (fsclk/1000/1000) / 1000;
139 result = (unsigned short)tmp;
140 if ((tmp*1000*1000) < (tmin*(fsclk/1000)))
147 * bfin_set_piomode - Initialize host controller PATA PIO timings
148 * @ap: Port whose timings we are configuring
151 * Set PIO mode for device.
154 * None (inherited from caller).
157 static void bfin_set_piomode(struct ata_port *ap, int pio_mode)
159 int mode = pio_mode - XFER_PIO_0;
160 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
161 unsigned int fsclk = get_sclk();
162 unsigned short teoc_reg, t2_reg, teoc_pio;
163 unsigned short t4_reg, t2_pio, t1_reg;
164 unsigned short n0, n6, t6min = 5;
166 /* the most restrictive timing value is t6 and tc, the DIOW - data hold
167 * If one SCLK pulse is longer than this minimum value then register
168 * transfers cannot be supported at this frequency.
170 n6 = num_clocks_min(t6min, fsclk);
171 if (mode >= 0 && mode <= 4 && n6 >= 1) {
172 debug("set piomode: mode=%d, fsclk=%ud\n", mode, fsclk);
173 /* calculate the timing values for register transfers. */
174 while (mode > 0 && pio_fsclk[mode] > fsclk)
177 /* DIOR/DIOW to end cycle time */
178 t2_reg = num_clocks_min(reg_t2min[mode], fsclk);
179 /* DIOR/DIOW asserted pulse width */
180 teoc_reg = num_clocks_min(reg_teocmin[mode], fsclk);
182 n0 = num_clocks_min(reg_t0min[mode], fsclk);
184 /* increase t2 until we meed the minimum cycle length */
185 if (t2_reg + teoc_reg < n0)
186 t2_reg = n0 - teoc_reg;
188 /* calculate the timing values for pio transfers. */
190 /* DIOR/DIOW to end cycle time */
191 t2_pio = num_clocks_min(pio_t2min[mode], fsclk);
192 /* DIOR/DIOW asserted pulse width */
193 teoc_pio = num_clocks_min(pio_teocmin[mode], fsclk);
195 n0 = num_clocks_min(pio_t0min[mode], fsclk);
197 /* increase t2 until we meed the minimum cycle length */
198 if (t2_pio + teoc_pio < n0)
199 t2_pio = n0 - teoc_pio;
201 /* Address valid to DIOR/DIORW */
202 t1_reg = num_clocks_min(pio_t1min[mode], fsclk);
205 t4_reg = num_clocks_min(pio_t4min[mode], fsclk);
207 ATAPI_SET_REG_TIM_0(base, (teoc_reg<<8 | t2_reg));
208 ATAPI_SET_PIO_TIM_0(base, (t4_reg<<12 | t2_pio<<4 | t1_reg));
209 ATAPI_SET_PIO_TIM_1(base, teoc_pio);
211 ATAPI_SET_CONTROL(base,
212 ATAPI_GET_CONTROL(base) | IORDY_EN);
214 ATAPI_SET_CONTROL(base,
215 ATAPI_GET_CONTROL(base) & ~IORDY_EN);
218 /* Disable host ATAPI PIO interrupts */
219 ATAPI_SET_INT_MASK(base, ATAPI_GET_INT_MASK(base)
220 & ~(PIO_DONE_MASK | HOST_TERM_XFER_MASK));
227 * Function: wait_complete
229 * Description: Waits the interrupt from device
232 static inline void wait_complete(void __iomem *base, unsigned short mask)
234 unsigned short status;
237 for (i = 0; i < PATA_BFIN_WAIT_TIMEOUT; i++) {
238 status = ATAPI_GET_INT_STATUS(base) & mask;
243 ATAPI_SET_INT_STATUS(base, mask);
248 * Function: write_atapi_register
250 * Description: Writes to ATA Device Resgister
254 static void write_atapi_register(void __iomem *base,
255 unsigned long ata_reg, unsigned short value)
257 /* Program the ATA_DEV_TXBUF register with write data (to be
258 * written into the device).
260 ATAPI_SET_DEV_TXBUF(base, value);
262 /* Program the ATA_DEV_ADDR register with address of the
263 * device register (0x01 to 0x0F).
265 ATAPI_SET_DEV_ADDR(base, ata_reg);
267 /* Program the ATA_CTRL register with dir set to write (1)
269 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | XFER_DIR));
271 /* ensure PIO DMA is not set */
272 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~PIO_USE_DMA));
274 /* and start the transfer */
275 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | PIO_START));
277 /* Wait for the interrupt to indicate the end of the transfer.
278 * (We need to wait on and clear rhe ATA_DEV_INT interrupt status)
280 wait_complete(base, PIO_DONE_INT);
285 * Function: read_atapi_register
287 *Description: Reads from ATA Device Resgister
291 static unsigned short read_atapi_register(void __iomem *base,
292 unsigned long ata_reg)
294 /* Program the ATA_DEV_ADDR register with address of the
295 * device register (0x01 to 0x0F).
297 ATAPI_SET_DEV_ADDR(base, ata_reg);
299 /* Program the ATA_CTRL register with dir set to read (0) and
301 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~XFER_DIR));
303 /* ensure PIO DMA is not set */
304 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~PIO_USE_DMA));
306 /* and start the transfer */
307 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | PIO_START));
309 /* Wait for the interrupt to indicate the end of the transfer.
310 * (PIO_DONE interrupt is set and it doesn't seem to matter
311 * that we don't clear it)
313 wait_complete(base, PIO_DONE_INT);
315 /* Read the ATA_DEV_RXBUF register with write data (to be
316 * written into the device).
318 return ATAPI_GET_DEV_RXBUF(base);
323 * Function: write_atapi_register_data
325 * Description: Writes to ATA Device Resgister
329 static void write_atapi_data(void __iomem *base,
330 int len, unsigned short *buf)
334 /* Set transfer length to 1 */
335 ATAPI_SET_XFER_LEN(base, 1);
337 /* Program the ATA_DEV_ADDR register with address of the
340 ATAPI_SET_DEV_ADDR(base, ATA_REG_DATA);
342 /* Program the ATA_CTRL register with dir set to write (1)
344 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | XFER_DIR));
346 /* ensure PIO DMA is not set */
347 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~PIO_USE_DMA));
349 for (i = 0; i < len; i++) {
350 /* Program the ATA_DEV_TXBUF register with write data (to be
351 * written into the device).
353 ATAPI_SET_DEV_TXBUF(base, buf[i]);
355 /* and start the transfer */
356 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | PIO_START));
358 /* Wait for the interrupt to indicate the end of the transfer.
359 * (We need to wait on and clear rhe ATA_DEV_INT
362 wait_complete(base, PIO_DONE_INT);
368 * Function: read_atapi_register_data
370 * Description: Reads from ATA Device Resgister
374 static void read_atapi_data(void __iomem *base,
375 int len, unsigned short *buf)
379 /* Set transfer length to 1 */
380 ATAPI_SET_XFER_LEN(base, 1);
382 /* Program the ATA_DEV_ADDR register with address of the
385 ATAPI_SET_DEV_ADDR(base, ATA_REG_DATA);
387 /* Program the ATA_CTRL register with dir set to read (0) and
389 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~XFER_DIR));
391 /* ensure PIO DMA is not set */
392 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) & ~PIO_USE_DMA));
394 for (i = 0; i < len; i++) {
395 /* and start the transfer */
396 ATAPI_SET_CONTROL(base, (ATAPI_GET_CONTROL(base) | PIO_START));
398 /* Wait for the interrupt to indicate the end of the transfer.
399 * (PIO_DONE interrupt is set and it doesn't seem to matter
400 * that we don't clear it)
402 wait_complete(base, PIO_DONE_INT);
404 /* Read the ATA_DEV_RXBUF register with write data (to be
405 * written into the device).
407 buf[i] = ATAPI_GET_DEV_RXBUF(base);
412 * bfin_check_status - Read device status reg & clear interrupt
413 * @ap: port where the device is
415 * Note: Original code is ata_check_status().
418 static u8 bfin_check_status(struct ata_port *ap)
420 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
421 return read_atapi_register(base, ATA_REG_STATUS);
425 * bfin_check_altstatus - Read device alternate status reg
426 * @ap: port where the device is
429 static u8 bfin_check_altstatus(struct ata_port *ap)
431 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
432 return read_atapi_register(base, ATA_REG_ALTSTATUS);
436 * bfin_ata_busy_wait - Wait for a port status register
437 * @ap: Port to wait for.
438 * @bits: bits that must be clear
439 * @max: number of 10uS waits to perform
441 * Waits up to max*10 microseconds for the selected bits in the port's
442 * status register to be cleared.
443 * Returns final value of status register.
446 * Inherited from caller.
448 static inline u8 bfin_ata_busy_wait(struct ata_port *ap, unsigned int bits,
449 unsigned int max, u8 usealtstatus)
456 status = bfin_check_altstatus(ap);
458 status = bfin_check_status(ap);
460 } while (status != 0xff && (status & bits) && (max > 0));
466 * bfin_ata_busy_sleep - sleep until BSY clears, or timeout
467 * @ap: port containing status register to be polled
468 * @tmout_pat: impatience timeout in msecs
469 * @tmout: overall timeout in msecs
471 * Sleep until ATA Status register bit BSY clears,
472 * or a timeout occurs.
475 * 0 on success, -errno otherwise.
477 static int bfin_ata_busy_sleep(struct ata_port *ap,
478 long tmout_pat, unsigned long tmout)
482 status = bfin_ata_busy_wait(ap, ATA_BUSY, 300, 0);
483 while (status != 0xff && (status & ATA_BUSY) && tmout_pat > 0) {
486 status = bfin_ata_busy_wait(ap, ATA_BUSY, 3, 0);
489 if (status != 0xff && (status & ATA_BUSY))
490 printf("port is slow to respond, please be patient "
491 "(Status 0x%x)\n", status);
493 while (status != 0xff && (status & ATA_BUSY) && tmout_pat > 0) {
496 status = bfin_check_status(ap);
502 if (status & ATA_BUSY) {
503 printf("port failed to respond "
504 "(%lu secs, Status 0x%x)\n",
505 DIV_ROUND_UP(tmout, 1000), status);
513 * bfin_dev_select - Select device 0/1 on ATA bus
514 * @ap: ATA channel to manipulate
515 * @device: ATA device (numbered from zero) to select
517 * Note: Original code is ata_sff_dev_select().
520 static void bfin_dev_select(struct ata_port *ap, unsigned int device)
522 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
527 tmp = ATA_DEVICE_OBS;
529 tmp = ATA_DEVICE_OBS | ATA_DEV1;
531 write_atapi_register(base, ATA_REG_DEVICE, tmp);
536 * bfin_devchk - PATA device presence detection
537 * @ap: ATA channel to examine
538 * @device: Device to examine (starting at zero)
540 * Note: Original code is ata_devchk().
543 static unsigned int bfin_devchk(struct ata_port *ap,
546 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
549 bfin_dev_select(ap, device);
551 write_atapi_register(base, ATA_REG_NSECT, 0x55);
552 write_atapi_register(base, ATA_REG_LBAL, 0xaa);
554 write_atapi_register(base, ATA_REG_NSECT, 0xaa);
555 write_atapi_register(base, ATA_REG_LBAL, 0x55);
557 write_atapi_register(base, ATA_REG_NSECT, 0x55);
558 write_atapi_register(base, ATA_REG_LBAL, 0xaa);
560 nsect = read_atapi_register(base, ATA_REG_NSECT);
561 lbal = read_atapi_register(base, ATA_REG_LBAL);
563 if ((nsect == 0x55) && (lbal == 0xaa))
564 return 1; /* we found a device */
566 return 0; /* nothing found */
570 * bfin_bus_post_reset - PATA device post reset
572 * Note: Original code is ata_bus_post_reset().
575 static void bfin_bus_post_reset(struct ata_port *ap, unsigned int devmask)
577 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
578 unsigned int dev0 = devmask & (1 << 0);
579 unsigned int dev1 = devmask & (1 << 1);
582 /* if device 0 was found in ata_devchk, wait for its
586 bfin_ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
588 /* if device 1 was found in ata_devchk, wait for
589 * register access, then wait for BSY to clear
591 deadline = ATA_TMOUT_BOOT;
595 bfin_dev_select(ap, 1);
596 nsect = read_atapi_register(base, ATA_REG_NSECT);
597 lbal = read_atapi_register(base, ATA_REG_LBAL);
598 if ((nsect == 1) && (lbal == 1))
604 msleep(50); /* give drive a breather */
608 bfin_ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
610 /* is all this really necessary? */
611 bfin_dev_select(ap, 0);
613 bfin_dev_select(ap, 1);
615 bfin_dev_select(ap, 0);
619 * bfin_bus_softreset - PATA device software reset
621 * Note: Original code is ata_bus_softreset().
624 static unsigned int bfin_bus_softreset(struct ata_port *ap,
625 unsigned int devmask)
627 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
629 /* software reset. causes dev0 to be selected */
630 write_atapi_register(base, ATA_REG_CTRL, ap->ctl_reg);
632 write_atapi_register(base, ATA_REG_CTRL, ap->ctl_reg | ATA_SRST);
634 write_atapi_register(base, ATA_REG_CTRL, ap->ctl_reg);
636 /* spec mandates ">= 2ms" before checking status.
637 * We wait 150ms, because that was the magic delay used for
638 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
639 * between when the ATA command register is written, and then
640 * status is checked. Because waiting for "a while" before
641 * checking status is fine, post SRST, we perform this magic
642 * delay here as well.
644 * Old drivers/ide uses the 2mS rule and then waits for ready
648 /* Before we perform post reset processing we want to see if
649 * the bus shows 0xFF because the odd clown forgets the D7
652 if (bfin_check_status(ap) == 0xFF)
655 bfin_bus_post_reset(ap, devmask);
661 * bfin_softreset - reset host port via ATA SRST
664 * Note: Original code is ata_sff_softreset().
667 static int bfin_softreset(struct ata_port *ap)
669 unsigned int err_mask;
673 /* determine if device 0/1 are present.
674 * only one device is supported on one port by now.
676 if (bfin_devchk(ap, 0))
677 ap->dev_mask |= (1 << 0);
678 else if (bfin_devchk(ap, 1))
679 ap->dev_mask |= (1 << 1);
683 /* select device 0 again */
684 bfin_dev_select(ap, 0);
686 /* issue bus reset */
687 err_mask = bfin_bus_softreset(ap, ap->dev_mask);
689 printf("SRST failed (err_mask=0x%x)\n",
699 * bfin_irq_clear - Clear ATAPI interrupt.
700 * @ap: Port associated with this ATA transaction.
702 * Note: Original code is ata_sff_irq_clear().
705 static void bfin_irq_clear(struct ata_port *ap)
707 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
709 ATAPI_SET_INT_STATUS(base, ATAPI_GET_INT_STATUS(base)|ATAPI_DEV_INT
710 | MULTI_DONE_INT | UDMAIN_DONE_INT | UDMAOUT_DONE_INT
711 | MULTI_TERM_INT | UDMAIN_TERM_INT | UDMAOUT_TERM_INT);
714 static u8 bfin_wait_for_irq(struct ata_port *ap, unsigned int max)
716 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
719 if (ATAPI_GET_INT_STATUS(base) & (ATAPI_DEV_INT
720 | MULTI_DONE_INT | UDMAIN_DONE_INT | UDMAOUT_DONE_INT
721 | MULTI_TERM_INT | UDMAIN_TERM_INT | UDMAOUT_TERM_INT)) {
732 * bfin_ata_reset_port - initialize BFIN ATAPI port.
735 static int bfin_ata_reset_port(struct ata_port *ap)
737 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
739 unsigned short status;
741 /* Disable all ATAPI interrupts */
742 ATAPI_SET_INT_MASK(base, 0);
745 /* Assert the RESET signal 25us*/
746 ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) | DEV_RST);
749 /* Negate the RESET signal for 2ms*/
750 ATAPI_SET_CONTROL(base, ATAPI_GET_CONTROL(base) & ~DEV_RST);
753 /* Wait on Busy flag to clear */
756 status = read_atapi_register(base, ATA_REG_STATUS);
757 } while (--count && (status & ATA_BUSY));
759 /* Enable only ATAPI Device interrupt */
760 ATAPI_SET_INT_MASK(base, 1);
768 * Function: bfin_config_atapi_gpio
770 * Description: Configures the ATAPI pins for use
773 static int bfin_config_atapi_gpio(struct ata_port *ap)
775 const unsigned short pins[] = {
776 P_ATAPI_RESET, P_ATAPI_DIOR, P_ATAPI_DIOW, P_ATAPI_CS0,
777 P_ATAPI_CS1, P_ATAPI_DMACK, P_ATAPI_DMARQ, P_ATAPI_INTRQ,
778 P_ATAPI_IORDY, P_ATAPI_D0A, P_ATAPI_D1A, P_ATAPI_D2A,
779 P_ATAPI_D3A, P_ATAPI_D4A, P_ATAPI_D5A, P_ATAPI_D6A,
780 P_ATAPI_D7A, P_ATAPI_D8A, P_ATAPI_D9A, P_ATAPI_D10A,
781 P_ATAPI_D11A, P_ATAPI_D12A, P_ATAPI_D13A, P_ATAPI_D14A,
782 P_ATAPI_D15A, P_ATAPI_A0A, P_ATAPI_A1A, P_ATAPI_A2A, 0,
785 peripheral_request_list(pins, "pata_bfin");
791 * bfin_atapi_probe - attach a bfin atapi interface
792 * @pdev: platform device
794 * Register a bfin atapi interface.
797 * Platform devices are expected to contain 2 resources per port:
799 * - I/O Base (IORESOURCE_IO)
800 * - IRQ (IORESOURCE_IRQ)
803 static int bfin_ata_probe_port(struct ata_port *ap)
805 if (bfin_config_atapi_gpio(ap)) {
806 printf("Requesting Peripherals faild\n");
810 if (bfin_ata_reset_port(ap)) {
811 printf("Fail to reset ATAPI device\n");
815 if (ap->ata_mode >= XFER_PIO_0 && ap->ata_mode <= XFER_PIO_4)
816 bfin_set_piomode(ap, ap->ata_mode);
818 printf("Given ATA data transfer mode is not supported.\n");
825 #define ATA_SECTOR_WORDS (ATA_SECT_SIZE/2)
827 static void bfin_ata_identify(struct ata_port *ap, int dev)
829 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
831 static u16 iobuf[ATA_SECTOR_WORDS];
833 hd_driveid_t *iop = (hd_driveid_t *)iobuf;
835 memset(iobuf, 0, sizeof(iobuf));
837 if (!(ap->dev_mask & (1 << dev)))
840 debug("port=%d dev=%d\n", ap->port_no, dev);
842 bfin_dev_select(ap, dev);
845 /* Device Identify Command */
846 write_atapi_register(base, ATA_REG_CMD, ATA_CMD_ID_ATA);
847 bfin_check_altstatus(ap);
850 status = bfin_ata_busy_wait(ap, ATA_BUSY, 1000, 0);
851 if (status & ATA_ERR) {
852 printf("\ndevice not responding\n");
853 ap->dev_mask &= ~(1 << dev);
857 read_atapi_data(base, ATA_SECTOR_WORDS, iobuf);
859 ata_swap_buf_le16(iobuf, ATA_SECTOR_WORDS);
861 /* we require LBA and DMA support (bits 8 & 9 of word 49) */
862 if (!ata_id_has_dma(iobuf) || !ata_id_has_lba(iobuf))
863 printf("ata%u: no dma/lba\n", ap->port_no);
869 n_sectors = ata_id_n_sectors(iobuf);
871 if (n_sectors == 0) {
872 ap->dev_mask &= ~(1 << dev);
876 ata_id_c_string(iobuf, (unsigned char *)sata_dev_desc[ap->port_no].revision,
877 ATA_ID_FW_REV, sizeof(sata_dev_desc[ap->port_no].revision));
878 ata_id_c_string(iobuf, (unsigned char *)sata_dev_desc[ap->port_no].vendor,
879 ATA_ID_PROD, sizeof(sata_dev_desc[ap->port_no].vendor));
880 ata_id_c_string(iobuf, (unsigned char *)sata_dev_desc[ap->port_no].product,
881 ATA_ID_SERNO, sizeof(sata_dev_desc[ap->port_no].product));
883 if ((iop->config & 0x0080) == 0x0080)
884 sata_dev_desc[ap->port_no].removable = 1;
886 sata_dev_desc[ap->port_no].removable = 0;
888 sata_dev_desc[ap->port_no].lba = (u32) n_sectors;
889 debug("lba=0x%lx\n", sata_dev_desc[ap->port_no].lba);
892 if (iop->command_set_2 & 0x0400)
893 sata_dev_desc[ap->port_no].lba48 = 1;
895 sata_dev_desc[ap->port_no].lba48 = 0;
899 sata_dev_desc[ap->port_no].type = DEV_TYPE_HARDDISK;
900 sata_dev_desc[ap->port_no].blksz = ATA_SECT_SIZE;
901 sata_dev_desc[ap->port_no].log2blksz =
902 LOG2(sata_dev_desc[ap->port_no].blksz);
903 sata_dev_desc[ap->port_no].lun = 0; /* just to fill something in... */
905 printf("PATA device#%d %s is found on ata port#%d.\n",
906 ap->port_no%PATA_DEV_NUM_PER_PORT,
907 sata_dev_desc[ap->port_no].vendor,
908 ap->port_no/PATA_DEV_NUM_PER_PORT);
911 static void bfin_ata_set_Feature_cmd(struct ata_port *ap, int dev)
913 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
916 if (!(ap->dev_mask & (1 << dev)))
919 bfin_dev_select(ap, dev);
921 write_atapi_register(base, ATA_REG_FEATURE, SETFEATURES_XFER);
922 write_atapi_register(base, ATA_REG_NSECT, ap->ata_mode);
923 write_atapi_register(base, ATA_REG_LBAL, 0);
924 write_atapi_register(base, ATA_REG_LBAM, 0);
925 write_atapi_register(base, ATA_REG_LBAH, 0);
927 write_atapi_register(base, ATA_REG_DEVICE, ATA_DEVICE_OBS);
928 write_atapi_register(base, ATA_REG_CMD, ATA_CMD_SET_FEATURES);
933 status = bfin_ata_busy_wait(ap, ATA_BUSY, 5000, 0);
934 if ((status & (ATA_BUSY | ATA_ERR))) {
935 printf("Error : status 0x%02x\n", status);
936 ap->dev_mask &= ~(1 << dev);
940 int scan_sata(int dev)
942 /* dev is the index of each ata device in the system. one PATA port
943 * contains 2 devices. one element in scan_done array indicates one
944 * PATA port. device connected to one PATA port is selected by
945 * bfin_dev_select() before access.
947 struct ata_port *ap = &port[dev];
948 static int scan_done[(CONFIG_SYS_SATA_MAX_DEVICE+1)/PATA_DEV_NUM_PER_PORT];
950 if (scan_done[dev/PATA_DEV_NUM_PER_PORT])
953 /* Check for attached device */
954 if (!bfin_ata_probe_port(ap)) {
955 if (bfin_softreset(ap)) {
956 /* soft reset failed, try a hard one */
957 bfin_ata_reset_port(ap);
958 if (bfin_softreset(ap))
959 scan_done[dev/PATA_DEV_NUM_PER_PORT] = 1;
961 scan_done[dev/PATA_DEV_NUM_PER_PORT] = 1;
964 if (scan_done[dev/PATA_DEV_NUM_PER_PORT]) {
965 /* Probe device and set xfer mode */
966 bfin_ata_identify(ap, dev%PATA_DEV_NUM_PER_PORT);
967 bfin_ata_set_Feature_cmd(ap, dev%PATA_DEV_NUM_PER_PORT);
968 init_part(&sata_dev_desc[dev]);
972 printf("PATA device#%d is not present on ATA port#%d.\n",
973 ap->port_no%PATA_DEV_NUM_PER_PORT,
974 ap->port_no/PATA_DEV_NUM_PER_PORT);
979 int init_sata(int dev)
981 struct ata_port *ap = &port[dev];
990 switch (dev/PATA_DEV_NUM_PER_PORT) {
992 ap->ioaddr.ctl_addr = ATAPI_CONTROL;
993 ap->ata_mode = CONFIG_BFIN_ATA_MODE;
996 printf("Tried to scan unknown port %d.\n", dev);
1000 if (ap->ata_mode < XFER_PIO_0 || ap->ata_mode > XFER_PIO_4) {
1001 ap->ata_mode = XFER_PIO_4;
1002 printf("DMA mode is not supported. Set to PIO mode 4.\n");
1006 ap->ctl_reg = 0x8; /*Default value of control reg */
1012 int reset_sata(int dev)
1017 /* Read up to 255 sectors
1019 * Returns sectors read
1021 static u8 do_one_read(struct ata_port *ap, u64 blknr, u8 blkcnt, u16 *buffer,
1024 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
1029 if (!(bfin_check_status(ap) & ATA_DRDY)) {
1030 printf("Device ata%d not ready\n", ap->port_no);
1034 /* Set up transfer */
1037 /* write high bits */
1038 write_atapi_register(base, ATA_REG_NSECT, 0);
1039 write_atapi_register(base, ATA_REG_LBAL, (blknr >> 24) & 0xFF);
1040 write_atapi_register(base, ATA_REG_LBAM, (blknr >> 32) & 0xFF);
1041 write_atapi_register(base, ATA_REG_LBAH, (blknr >> 40) & 0xFF);
1044 write_atapi_register(base, ATA_REG_NSECT, blkcnt);
1045 write_atapi_register(base, ATA_REG_LBAL, (blknr >> 0) & 0xFF);
1046 write_atapi_register(base, ATA_REG_LBAM, (blknr >> 8) & 0xFF);
1047 write_atapi_register(base, ATA_REG_LBAH, (blknr >> 16) & 0xFF);
1051 write_atapi_register(base, ATA_REG_DEVICE, ATA_LBA);
1052 write_atapi_register(base, ATA_REG_CMD, ATA_CMD_PIO_READ_EXT);
1056 write_atapi_register(base, ATA_REG_DEVICE, ATA_LBA | ((blknr >> 24) & 0xF));
1057 write_atapi_register(base, ATA_REG_CMD, ATA_CMD_PIO_READ);
1059 status = bfin_ata_busy_wait(ap, ATA_BUSY, 500000, 1);
1061 if (status & (ATA_BUSY | ATA_ERR)) {
1062 printf("Device %d not responding status 0x%x.\n", ap->port_no, status);
1063 err = read_atapi_register(base, ATA_REG_ERR);
1064 printf("Error reg = 0x%x\n", err);
1069 if (bfin_wait_for_irq(ap, 500)) {
1070 printf("ata%u irq failed\n", ap->port_no);
1074 status = bfin_check_status(ap);
1075 if (status & ATA_ERR) {
1076 err = read_atapi_register(base, ATA_REG_ERR);
1077 printf("ata%u error %d\n", ap->port_no, err);
1082 /* Read one sector */
1083 read_atapi_data(base, ATA_SECTOR_WORDS, buffer);
1084 buffer += ATA_SECTOR_WORDS;
1091 ulong sata_read(int dev, ulong block, lbaint_t blkcnt, void *buff)
1093 struct ata_port *ap = &port[dev];
1095 u16 *buffer = (u16 *) buff;
1097 u64 blknr = (u64) block;
1098 unsigned char lba48 = 0;
1101 if (blknr > 0xfffffff) {
1102 if (!sata_dev_desc[dev].lba48) {
1103 printf("Drive doesn't support 48-bit addressing\n");
1106 /* more than 28 bits used, use 48bit mode */
1110 bfin_dev_select(ap, dev%PATA_DEV_NUM_PER_PORT);
1112 while (blkcnt > 0) {
1119 status = do_one_read(ap, blknr, sread, buffer, lba48);
1120 if (status != sread) {
1121 printf("Read failed\n");
1128 buffer += sread * ATA_SECTOR_WORDS;
1133 ulong sata_write(int dev, ulong block, lbaint_t blkcnt, const void *buff)
1135 struct ata_port *ap = &port[dev];
1136 void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
1138 u16 *buffer = (u16 *) buff;
1139 unsigned char status = 0;
1140 u64 blknr = (u64) block;
1142 unsigned char lba48 = 0;
1144 if (blknr > 0xfffffff) {
1145 if (!sata_dev_desc[dev].lba48) {
1146 printf("Drive doesn't support 48-bit addressing\n");
1149 /* more than 28 bits used, use 48bit mode */
1154 bfin_dev_select(ap, dev%PATA_DEV_NUM_PER_PORT);
1156 while (blkcnt-- > 0) {
1157 status = bfin_ata_busy_wait(ap, ATA_BUSY, 50000, 0);
1158 if (status & ATA_BUSY) {
1159 printf("ata%u failed to respond\n", ap->port_no);
1164 /* write high bits */
1165 write_atapi_register(base, ATA_REG_NSECT, 0);
1166 write_atapi_register(base, ATA_REG_LBAL,
1167 (blknr >> 24) & 0xFF);
1168 write_atapi_register(base, ATA_REG_LBAM,
1169 (blknr >> 32) & 0xFF);
1170 write_atapi_register(base, ATA_REG_LBAH,
1171 (blknr >> 40) & 0xFF);
1174 write_atapi_register(base, ATA_REG_NSECT, 1);
1175 write_atapi_register(base, ATA_REG_LBAL, (blknr >> 0) & 0xFF);
1176 write_atapi_register(base, ATA_REG_LBAM, (blknr >> 8) & 0xFF);
1177 write_atapi_register(base, ATA_REG_LBAH, (blknr >> 16) & 0xFF);
1180 write_atapi_register(base, ATA_REG_DEVICE, ATA_LBA);
1181 write_atapi_register(base, ATA_REG_CMD,
1182 ATA_CMD_PIO_WRITE_EXT);
1186 write_atapi_register(base, ATA_REG_DEVICE,
1187 ATA_LBA | ((blknr >> 24) & 0xF));
1188 write_atapi_register(base, ATA_REG_CMD,
1192 /*may take up to 5 sec */
1193 status = bfin_ata_busy_wait(ap, ATA_BUSY, 50000, 0);
1194 if ((status & (ATA_DRQ | ATA_BUSY | ATA_ERR)) != ATA_DRQ) {
1195 printf("Error no DRQ dev %d blk %ld: sts 0x%02x\n",
1196 ap->port_no, (ulong) blknr, status);
1200 write_atapi_data(base, ATA_SECTOR_WORDS, buffer);
1201 bfin_check_altstatus(ap);
1206 buffer += ATA_SECTOR_WORDS;