2 * Copyright (C) Freescale Semiconductor, Inc. 2006.
3 * Author: Jason Jin<Jason.jin@freescale.com>
4 * Zhang Wei<wei.zhang@freescale.com>
6 * SPDX-License-Identifier: GPL-2.0+
8 * with the reference on libata and ahci drvier in kernel
14 #include <asm/processor.h>
15 #include <asm/errno.h>
20 #include <linux/ctype.h>
23 static int ata_io_flush(u8 port
);
25 struct ahci_probe_ent
*probe_ent
= NULL
;
26 u16
*ataid
[AHCI_MAX_PORTS
];
28 #define writel_with_flush(a,b) do { writel(a,b); readl(b); } while (0)
31 * Some controllers limit number of blocks they can read/write at once.
32 * Contemporary SSD devices work much faster if the read/write size is aligned
33 * to a power of 2. Let's set default to 128 and allowing to be overwritten if
36 #ifndef MAX_SATA_BLOCKS_READ_WRITE
37 #define MAX_SATA_BLOCKS_READ_WRITE 0x80
40 /* Maximum timeouts for each event */
41 #define WAIT_MS_SPINUP 20000
42 #define WAIT_MS_DATAIO 5000
43 #define WAIT_MS_FLUSH 5000
44 #define WAIT_MS_LINKUP 200
46 static inline u32
ahci_port_base(u32 base
, u32 port
)
48 return base
+ 0x100 + (port
* 0x80);
52 static void ahci_setup_port(struct ahci_ioports
*port
, unsigned long base
,
53 unsigned int port_idx
)
55 base
= ahci_port_base(base
, port_idx
);
57 port
->cmd_addr
= base
;
58 port
->scr_addr
= base
+ PORT_SCR
;
62 #define msleep(a) udelay(a * 1000)
64 static void ahci_dcache_flush_range(unsigned begin
, unsigned len
)
66 const unsigned long start
= begin
;
67 const unsigned long end
= start
+ len
;
69 debug("%s: flush dcache: [%#lx, %#lx)\n", __func__
, start
, end
);
70 flush_dcache_range(start
, end
);
74 * SATA controller DMAs to physical RAM. Ensure data from the
75 * controller is invalidated from dcache; next access comes from
78 static void ahci_dcache_invalidate_range(unsigned begin
, unsigned len
)
80 const unsigned long start
= begin
;
81 const unsigned long end
= start
+ len
;
83 debug("%s: invalidate dcache: [%#lx, %#lx)\n", __func__
, start
, end
);
84 invalidate_dcache_range(start
, end
);
88 * Ensure data for SATA controller is flushed out of dcache and
89 * written to physical memory.
91 static void ahci_dcache_flush_sata_cmd(struct ahci_ioports
*pp
)
93 ahci_dcache_flush_range((unsigned long)pp
->cmd_slot
,
94 AHCI_PORT_PRIV_DMA_SZ
);
97 static int waiting_for_cmd_completed(volatile u8
*offset
,
104 for (i
= 0; ((status
= readl(offset
)) & sign
) && i
< timeout_msec
; i
++)
107 return (i
< timeout_msec
) ? 0 : -1;
110 int __weak
ahci_link_up(struct ahci_probe_ent
*probe_ent
, u8 port
)
114 u8
*port_mmio
= (u8
*)probe_ent
->port
[port
].port_mmio
;
117 * Bring up SATA link.
118 * SATA link bringup time is usually less than 1 ms; only very
119 * rarely has it taken between 1-2 ms. Never seen it above 2 ms.
121 while (j
< WAIT_MS_LINKUP
) {
122 tmp
= readl(port_mmio
+ PORT_SCR_STAT
);
123 tmp
&= PORT_SCR_STAT_DET_MASK
;
124 if (tmp
== PORT_SCR_STAT_DET_PHYRDY
)
132 #ifdef CONFIG_SUNXI_AHCI
133 /* The sunxi AHCI controller requires this undocumented setup */
134 static void sunxi_dma_init(volatile u8
*port_mmio
)
136 clrsetbits_le32(port_mmio
+ PORT_P0DMACR
, 0x0000ff00, 0x00004400);
140 static int ahci_host_init(struct ahci_probe_ent
*probe_ent
)
142 #ifndef CONFIG_SCSI_AHCI_PLAT
143 pci_dev_t pdev
= probe_ent
->dev
;
145 unsigned short vendor
;
147 volatile u8
*mmio
= (volatile u8
*)probe_ent
->mmio_base
;
148 u32 tmp
, cap_save
, cmd
;
150 volatile u8
*port_mmio
;
153 debug("ahci_host_init: start\n");
155 cap_save
= readl(mmio
+ HOST_CAP
);
156 cap_save
&= ((1 << 28) | (1 << 17));
157 cap_save
|= (1 << 27); /* Staggered Spin-up. Not needed. */
159 /* global controller reset */
160 tmp
= readl(mmio
+ HOST_CTL
);
161 if ((tmp
& HOST_RESET
) == 0)
162 writel_with_flush(tmp
| HOST_RESET
, mmio
+ HOST_CTL
);
164 /* reset must complete within 1 second, or
165 * the hardware should be considered fried.
170 tmp
= readl(mmio
+ HOST_CTL
);
172 debug("controller reset failed (0x%x)\n", tmp
);
175 } while (tmp
& HOST_RESET
);
177 writel_with_flush(HOST_AHCI_EN
, mmio
+ HOST_CTL
);
178 writel(cap_save
, mmio
+ HOST_CAP
);
179 writel_with_flush(0xf, mmio
+ HOST_PORTS_IMPL
);
181 #ifndef CONFIG_SCSI_AHCI_PLAT
182 pci_read_config_word(pdev
, PCI_VENDOR_ID
, &vendor
);
184 if (vendor
== PCI_VENDOR_ID_INTEL
) {
186 pci_read_config_word(pdev
, 0x92, &tmp16
);
188 pci_write_config_word(pdev
, 0x92, tmp16
);
191 probe_ent
->cap
= readl(mmio
+ HOST_CAP
);
192 probe_ent
->port_map
= readl(mmio
+ HOST_PORTS_IMPL
);
193 port_map
= probe_ent
->port_map
;
194 probe_ent
->n_ports
= (probe_ent
->cap
& 0x1f) + 1;
196 debug("cap 0x%x port_map 0x%x n_ports %d\n",
197 probe_ent
->cap
, probe_ent
->port_map
, probe_ent
->n_ports
);
199 if (probe_ent
->n_ports
> CONFIG_SYS_SCSI_MAX_SCSI_ID
)
200 probe_ent
->n_ports
= CONFIG_SYS_SCSI_MAX_SCSI_ID
;
202 for (i
= 0; i
< probe_ent
->n_ports
; i
++) {
203 if (!(port_map
& (1 << i
)))
205 probe_ent
->port
[i
].port_mmio
= ahci_port_base((u32
) mmio
, i
);
206 port_mmio
= (u8
*) probe_ent
->port
[i
].port_mmio
;
207 ahci_setup_port(&probe_ent
->port
[i
], (unsigned long)mmio
, i
);
209 /* make sure port is not active */
210 tmp
= readl(port_mmio
+ PORT_CMD
);
211 if (tmp
& (PORT_CMD_LIST_ON
| PORT_CMD_FIS_ON
|
212 PORT_CMD_FIS_RX
| PORT_CMD_START
)) {
213 debug("Port %d is active. Deactivating.\n", i
);
214 tmp
&= ~(PORT_CMD_LIST_ON
| PORT_CMD_FIS_ON
|
215 PORT_CMD_FIS_RX
| PORT_CMD_START
);
216 writel_with_flush(tmp
, port_mmio
+ PORT_CMD
);
218 /* spec says 500 msecs for each bit, so
219 * this is slightly incorrect.
224 #ifdef CONFIG_SUNXI_AHCI
225 sunxi_dma_init(port_mmio
);
228 /* Add the spinup command to whatever mode bits may
229 * already be on in the command register.
231 cmd
= readl(port_mmio
+ PORT_CMD
);
232 cmd
|= PORT_CMD_FIS_RX
;
233 cmd
|= PORT_CMD_SPIN_UP
;
234 writel_with_flush(cmd
, port_mmio
+ PORT_CMD
);
236 /* Bring up SATA link. */
237 ret
= ahci_link_up(probe_ent
, i
);
239 printf("SATA link %d timeout.\n", i
);
242 debug("SATA link ok.\n");
245 /* Clear error status */
246 tmp
= readl(port_mmio
+ PORT_SCR_ERR
);
248 writel(tmp
, port_mmio
+ PORT_SCR_ERR
);
250 debug("Spinning up device on SATA port %d... ", i
);
253 while (j
< WAIT_MS_SPINUP
) {
254 tmp
= readl(port_mmio
+ PORT_TFDATA
);
255 if (!(tmp
& (ATA_BUSY
| ATA_DRQ
)))
258 tmp
= readl(port_mmio
+ PORT_SCR_STAT
);
259 tmp
&= PORT_SCR_STAT_DET_MASK
;
260 if (tmp
== PORT_SCR_STAT_DET_PHYRDY
)
265 tmp
= readl(port_mmio
+ PORT_SCR_STAT
) & PORT_SCR_STAT_DET_MASK
;
266 if (tmp
== PORT_SCR_STAT_DET_COMINIT
) {
267 debug("SATA link %d down (COMINIT received), retrying...\n", i
);
272 printf("Target spinup took %d ms.\n", j
);
273 if (j
== WAIT_MS_SPINUP
)
278 tmp
= readl(port_mmio
+ PORT_SCR_ERR
);
279 debug("PORT_SCR_ERR 0x%x\n", tmp
);
280 writel(tmp
, port_mmio
+ PORT_SCR_ERR
);
282 /* ack any pending irq events for this port */
283 tmp
= readl(port_mmio
+ PORT_IRQ_STAT
);
284 debug("PORT_IRQ_STAT 0x%x\n", tmp
);
286 writel(tmp
, port_mmio
+ PORT_IRQ_STAT
);
288 writel(1 << i
, mmio
+ HOST_IRQ_STAT
);
290 /* set irq mask (enables interrupts) */
291 writel(DEF_PORT_IRQ
, port_mmio
+ PORT_IRQ_MASK
);
293 /* register linkup ports */
294 tmp
= readl(port_mmio
+ PORT_SCR_STAT
);
295 debug("SATA port %d status: 0x%x\n", i
, tmp
);
296 if ((tmp
& PORT_SCR_STAT_DET_MASK
) == PORT_SCR_STAT_DET_PHYRDY
)
297 probe_ent
->link_port_map
|= (0x01 << i
);
300 tmp
= readl(mmio
+ HOST_CTL
);
301 debug("HOST_CTL 0x%x\n", tmp
);
302 writel(tmp
| HOST_IRQ_EN
, mmio
+ HOST_CTL
);
303 tmp
= readl(mmio
+ HOST_CTL
);
304 debug("HOST_CTL 0x%x\n", tmp
);
305 #ifndef CONFIG_SCSI_AHCI_PLAT
306 pci_read_config_word(pdev
, PCI_COMMAND
, &tmp16
);
307 tmp
|= PCI_COMMAND_MASTER
;
308 pci_write_config_word(pdev
, PCI_COMMAND
, tmp16
);
314 static void ahci_print_info(struct ahci_probe_ent
*probe_ent
)
316 #ifndef CONFIG_SCSI_AHCI_PLAT
317 pci_dev_t pdev
= probe_ent
->dev
;
320 volatile u8
*mmio
= (volatile u8
*)probe_ent
->mmio_base
;
321 u32 vers
, cap
, cap2
, impl
, speed
;
325 vers
= readl(mmio
+ HOST_VERSION
);
326 cap
= probe_ent
->cap
;
327 cap2
= readl(mmio
+ HOST_CAP2
);
328 impl
= probe_ent
->port_map
;
330 speed
= (cap
>> 20) & 0xf;
340 #ifdef CONFIG_SCSI_AHCI_PLAT
343 pci_read_config_word(pdev
, 0x0a, &cc
);
346 else if (cc
== 0x0106)
348 else if (cc
== 0x0104)
353 printf("AHCI %02x%02x.%02x%02x "
354 "%u slots %u ports %s Gbps 0x%x impl %s mode\n",
359 ((cap
>> 8) & 0x1f) + 1, (cap
& 0x1f) + 1, speed_s
, impl
, scc_s
);
365 cap
& (1 << 31) ? "64bit " : "",
366 cap
& (1 << 30) ? "ncq " : "",
367 cap
& (1 << 28) ? "ilck " : "",
368 cap
& (1 << 27) ? "stag " : "",
369 cap
& (1 << 26) ? "pm " : "",
370 cap
& (1 << 25) ? "led " : "",
371 cap
& (1 << 24) ? "clo " : "",
372 cap
& (1 << 19) ? "nz " : "",
373 cap
& (1 << 18) ? "only " : "",
374 cap
& (1 << 17) ? "pmp " : "",
375 cap
& (1 << 16) ? "fbss " : "",
376 cap
& (1 << 15) ? "pio " : "",
377 cap
& (1 << 14) ? "slum " : "",
378 cap
& (1 << 13) ? "part " : "",
379 cap
& (1 << 7) ? "ccc " : "",
380 cap
& (1 << 6) ? "ems " : "",
381 cap
& (1 << 5) ? "sxs " : "",
382 cap2
& (1 << 2) ? "apst " : "",
383 cap2
& (1 << 1) ? "nvmp " : "",
384 cap2
& (1 << 0) ? "boh " : "");
387 #ifndef CONFIG_SCSI_AHCI_PLAT
388 static int ahci_init_one(pci_dev_t pdev
)
393 probe_ent
= malloc(sizeof(struct ahci_probe_ent
));
395 printf("%s: No memory for probe_ent\n", __func__
);
399 memset(probe_ent
, 0, sizeof(struct ahci_probe_ent
));
400 probe_ent
->dev
= pdev
;
402 probe_ent
->host_flags
= ATA_FLAG_SATA
407 probe_ent
->pio_mask
= 0x1f;
408 probe_ent
->udma_mask
= 0x7f; /*Fixme,assume to support UDMA6 */
410 pci_read_config_dword(pdev
, PCI_BASE_ADDRESS_5
, &probe_ent
->mmio_base
);
411 debug("ahci mmio_base=0x%08x\n", probe_ent
->mmio_base
);
414 * JMicron-specific fixup:
415 * make sure we're in AHCI mode
417 pci_read_config_word(pdev
, PCI_VENDOR_ID
, &vendor
);
418 if (vendor
== 0x197b)
419 pci_write_config_byte(pdev
, 0x41, 0xa1);
421 /* initialize adapter */
422 rc
= ahci_host_init(probe_ent
);
426 ahci_print_info(probe_ent
);
435 #define MAX_DATA_BYTE_COUNT (4*1024*1024)
437 static int ahci_fill_sg(u8 port
, unsigned char *buf
, int buf_len
)
439 struct ahci_ioports
*pp
= &(probe_ent
->port
[port
]);
440 struct ahci_sg
*ahci_sg
= pp
->cmd_tbl_sg
;
444 sg_count
= ((buf_len
- 1) / MAX_DATA_BYTE_COUNT
) + 1;
445 if (sg_count
> AHCI_MAX_SG
) {
446 printf("Error:Too much sg!\n");
450 for (i
= 0; i
< sg_count
; i
++) {
452 cpu_to_le32((u32
) buf
+ i
* MAX_DATA_BYTE_COUNT
);
453 ahci_sg
->addr_hi
= 0;
454 ahci_sg
->flags_size
= cpu_to_le32(0x3fffff &
455 (buf_len
< MAX_DATA_BYTE_COUNT
457 : (MAX_DATA_BYTE_COUNT
- 1)));
459 buf_len
-= MAX_DATA_BYTE_COUNT
;
466 static void ahci_fill_cmd_slot(struct ahci_ioports
*pp
, u32 opts
)
468 pp
->cmd_slot
->opts
= cpu_to_le32(opts
);
469 pp
->cmd_slot
->status
= 0;
470 pp
->cmd_slot
->tbl_addr
= cpu_to_le32(pp
->cmd_tbl
& 0xffffffff);
471 pp
->cmd_slot
->tbl_addr_hi
= 0;
475 #ifdef CONFIG_AHCI_SETFEATURES_XFER
476 static void ahci_set_feature(u8 port
)
478 struct ahci_ioports
*pp
= &(probe_ent
->port
[port
]);
479 volatile u8
*port_mmio
= (volatile u8
*)pp
->port_mmio
;
480 u32 cmd_fis_len
= 5; /* five dwords */
484 memset(fis
, 0, sizeof(fis
));
487 fis
[2] = ATA_CMD_SET_FEATURES
;
488 fis
[3] = SETFEATURES_XFER
;
489 fis
[12] = __ilog2(probe_ent
->udma_mask
+ 1) + 0x40 - 0x01;
491 memcpy((unsigned char *)pp
->cmd_tbl
, fis
, sizeof(fis
));
492 ahci_fill_cmd_slot(pp
, cmd_fis_len
);
493 ahci_dcache_flush_sata_cmd(pp
);
494 writel(1, port_mmio
+ PORT_CMD_ISSUE
);
495 readl(port_mmio
+ PORT_CMD_ISSUE
);
497 if (waiting_for_cmd_completed(port_mmio
+ PORT_CMD_ISSUE
,
498 WAIT_MS_DATAIO
, 0x1)) {
499 printf("set feature error on port %d!\n", port
);
505 static int ahci_port_start(u8 port
)
507 struct ahci_ioports
*pp
= &(probe_ent
->port
[port
]);
508 volatile u8
*port_mmio
= (volatile u8
*)pp
->port_mmio
;
512 debug("Enter start port: %d\n", port
);
513 port_status
= readl(port_mmio
+ PORT_SCR_STAT
);
514 debug("Port %d status: %x\n", port
, port_status
);
515 if ((port_status
& 0xf) != 0x03) {
516 printf("No Link on this port!\n");
520 mem
= (u32
) malloc(AHCI_PORT_PRIV_DMA_SZ
+ 2048);
523 printf("%s: No mem for table!\n", __func__
);
527 mem
= (mem
+ 0x800) & (~0x7ff); /* Aligned to 2048-bytes */
528 memset((u8
*) mem
, 0, AHCI_PORT_PRIV_DMA_SZ
);
531 * First item in chunk of DMA memory: 32-slot command table,
532 * 32 bytes each in size
535 (struct ahci_cmd_hdr
*)(uintptr_t)virt_to_phys((void *)mem
);
536 debug("cmd_slot = 0x%x\n", (unsigned)pp
->cmd_slot
);
537 mem
+= (AHCI_CMD_SLOT_SZ
+ 224);
540 * Second item: Received-FIS area
542 pp
->rx_fis
= virt_to_phys((void *)mem
);
543 mem
+= AHCI_RX_FIS_SZ
;
546 * Third item: data area for storing a single command
547 * and its scatter-gather table
549 pp
->cmd_tbl
= virt_to_phys((void *)mem
);
550 debug("cmd_tbl_dma = 0x%x\n", pp
->cmd_tbl
);
552 mem
+= AHCI_CMD_TBL_HDR
;
554 (struct ahci_sg
*)(uintptr_t)virt_to_phys((void *)mem
);
556 writel_with_flush((u32
) pp
->cmd_slot
, port_mmio
+ PORT_LST_ADDR
);
558 writel_with_flush(pp
->rx_fis
, port_mmio
+ PORT_FIS_ADDR
);
560 #ifdef CONFIG_SUNXI_AHCI
561 sunxi_dma_init(port_mmio
);
564 writel_with_flush(PORT_CMD_ICC_ACTIVE
| PORT_CMD_FIS_RX
|
565 PORT_CMD_POWER_ON
| PORT_CMD_SPIN_UP
|
566 PORT_CMD_START
, port_mmio
+ PORT_CMD
);
568 debug("Exit start port %d\n", port
);
574 static int ahci_device_data_io(u8 port
, u8
*fis
, int fis_len
, u8
*buf
,
575 int buf_len
, u8 is_write
)
578 struct ahci_ioports
*pp
= &(probe_ent
->port
[port
]);
579 volatile u8
*port_mmio
= (volatile u8
*)pp
->port_mmio
;
584 debug("Enter %s: for port %d\n", __func__
, port
);
586 if (port
> probe_ent
->n_ports
) {
587 printf("Invalid port number %d\n", port
);
591 port_status
= readl(port_mmio
+ PORT_SCR_STAT
);
592 if ((port_status
& 0xf) != 0x03) {
593 debug("No Link on port %d!\n", port
);
597 memcpy((unsigned char *)pp
->cmd_tbl
, fis
, fis_len
);
599 sg_count
= ahci_fill_sg(port
, buf
, buf_len
);
600 opts
= (fis_len
>> 2) | (sg_count
<< 16) | (is_write
<< 6);
601 ahci_fill_cmd_slot(pp
, opts
);
603 ahci_dcache_flush_sata_cmd(pp
);
604 ahci_dcache_flush_range((unsigned)buf
, (unsigned)buf_len
);
606 writel_with_flush(1, port_mmio
+ PORT_CMD_ISSUE
);
608 if (waiting_for_cmd_completed(port_mmio
+ PORT_CMD_ISSUE
,
609 WAIT_MS_DATAIO
, 0x1)) {
610 printf("timeout exit!\n");
614 ahci_dcache_invalidate_range((unsigned)buf
, (unsigned)buf_len
);
615 debug("%s: %d byte transferred.\n", __func__
, pp
->cmd_slot
->status
);
621 static char *ata_id_strcpy(u16
*target
, u16
*src
, int len
)
624 for (i
= 0; i
< len
/ 2; i
++)
625 target
[i
] = swab16(src
[i
]);
626 return (char *)target
;
630 * SCSI INQUIRY command operation.
632 static int ata_scsiop_inquiry(ccb
*pccb
)
634 static const u8 hdr
[] = {
637 0x5, /* claim SPC-3 version compatibility */
643 ALLOC_CACHE_ALIGN_BUFFER(u16
, tmpid
, ATA_ID_WORDS
);
646 /* Clean ccb data buffer */
647 memset(pccb
->pdata
, 0, pccb
->datalen
);
649 memcpy(pccb
->pdata
, hdr
, sizeof(hdr
));
651 if (pccb
->datalen
<= 35)
654 memset(fis
, 0, sizeof(fis
));
655 /* Construct the FIS */
656 fis
[0] = 0x27; /* Host to device FIS. */
657 fis
[1] = 1 << 7; /* Command FIS. */
658 fis
[2] = ATA_CMD_ID_ATA
; /* Command byte. */
660 /* Read id from sata */
663 if (ahci_device_data_io(port
, (u8
*) &fis
, sizeof(fis
), (u8
*)tmpid
,
664 ATA_ID_WORDS
* 2, 0)) {
665 debug("scsi_ahci: SCSI inquiry command failure.\n");
670 ataid
[port
] = malloc(ATA_ID_WORDS
* 2);
672 printf("%s: No memory for ataid[port]\n", __func__
);
679 memcpy(idbuf
, tmpid
, ATA_ID_WORDS
* 2);
680 ata_swap_buf_le16(idbuf
, ATA_ID_WORDS
);
682 memcpy(&pccb
->pdata
[8], "ATA ", 8);
683 ata_id_strcpy((u16
*)&pccb
->pdata
[16], &idbuf
[ATA_ID_PROD
], 16);
684 ata_id_strcpy((u16
*)&pccb
->pdata
[32], &idbuf
[ATA_ID_FW_REV
], 4);
694 * SCSI READ10/WRITE10 command operation.
696 static int ata_scsiop_read_write(ccb
*pccb
, u8 is_write
)
701 u8
*user_buffer
= pccb
->pdata
;
702 u32 user_buffer_size
= pccb
->datalen
;
704 /* Retrieve the base LBA number from the ccb structure. */
705 memcpy(&lba
, pccb
->cmd
+ 2, sizeof(lba
));
706 lba
= be32_to_cpu(lba
);
709 * And the number of blocks.
711 * For 10-byte and 16-byte SCSI R/W commands, transfer
712 * length 0 means transfer 0 block of data.
713 * However, for ATA R/W commands, sector count 0 means
714 * 256 or 65536 sectors, not 0 sectors as in SCSI.
716 * WARNING: one or two older ATA drives treat 0 as 0...
718 blocks
= (((u16
)pccb
->cmd
[7]) << 8) | ((u16
) pccb
->cmd
[8]);
720 debug("scsi_ahci: %s %d blocks starting from lba 0x%x\n",
721 is_write
? "write" : "read", (unsigned)lba
, blocks
);
724 memset(fis
, 0, sizeof(fis
));
725 fis
[0] = 0x27; /* Host to device FIS. */
726 fis
[1] = 1 << 7; /* Command FIS. */
727 /* Command byte (read/write). */
728 fis
[2] = is_write
? ATA_CMD_WRITE_EXT
: ATA_CMD_READ_EXT
;
731 u16 now_blocks
; /* number of blocks per iteration */
732 u32 transfer_size
; /* number of bytes per iteration */
734 now_blocks
= min(MAX_SATA_BLOCKS_READ_WRITE
, blocks
);
736 transfer_size
= ATA_SECT_SIZE
* now_blocks
;
737 if (transfer_size
> user_buffer_size
) {
738 printf("scsi_ahci: Error: buffer too small.\n");
742 /* LBA48 SATA command but only use 32bit address range within
743 * that. The next smaller command range (28bit) is too small.
745 fis
[4] = (lba
>> 0) & 0xff;
746 fis
[5] = (lba
>> 8) & 0xff;
747 fis
[6] = (lba
>> 16) & 0xff;
748 fis
[7] = 1 << 6; /* device reg: set LBA mode */
749 fis
[8] = ((lba
>> 24) & 0xff);
750 fis
[3] = 0xe0; /* features */
752 /* Block (sector) count */
753 fis
[12] = (now_blocks
>> 0) & 0xff;
754 fis
[13] = (now_blocks
>> 8) & 0xff;
756 /* Read/Write from ahci */
757 if (ahci_device_data_io(pccb
->target
, (u8
*) &fis
, sizeof(fis
),
758 user_buffer
, user_buffer_size
,
760 debug("scsi_ahci: SCSI %s10 command failure.\n",
761 is_write
? "WRITE" : "READ");
765 /* If this transaction is a write, do a following flush.
766 * Writes in u-boot are so rare, and the logic to know when is
767 * the last write and do a flush only there is sufficiently
768 * difficult. Just do a flush after every write. This incurs,
769 * usually, one extra flush when the rare writes do happen.
772 if (-EIO
== ata_io_flush(pccb
->target
))
775 user_buffer
+= transfer_size
;
776 user_buffer_size
-= transfer_size
;
777 blocks
-= now_blocks
;
786 * SCSI READ CAPACITY10 command operation.
788 static int ata_scsiop_read_capacity10(ccb
*pccb
)
794 if (!ataid
[pccb
->target
]) {
795 printf("scsi_ahci: SCSI READ CAPACITY10 command failure. "
797 "\tPlease run SCSI commmand INQUIRY firstly!\n");
801 cap64
= ata_id_n_sectors(ataid
[pccb
->target
]);
802 if (cap64
> 0x100000000ULL
)
805 cap
= cpu_to_be32(cap64
);
806 memcpy(pccb
->pdata
, &cap
, sizeof(cap
));
808 block_size
= cpu_to_be32((u32
)512);
809 memcpy(&pccb
->pdata
[4], &block_size
, 4);
816 * SCSI READ CAPACITY16 command operation.
818 static int ata_scsiop_read_capacity16(ccb
*pccb
)
823 if (!ataid
[pccb
->target
]) {
824 printf("scsi_ahci: SCSI READ CAPACITY16 command failure. "
826 "\tPlease run SCSI commmand INQUIRY firstly!\n");
830 cap
= ata_id_n_sectors(ataid
[pccb
->target
]);
831 cap
= cpu_to_be64(cap
);
832 memcpy(pccb
->pdata
, &cap
, sizeof(cap
));
834 block_size
= cpu_to_be64((u64
)512);
835 memcpy(&pccb
->pdata
[8], &block_size
, 8);
842 * SCSI TEST UNIT READY command operation.
844 static int ata_scsiop_test_unit_ready(ccb
*pccb
)
846 return (ataid
[pccb
->target
]) ? 0 : -EPERM
;
850 int scsi_exec(ccb
*pccb
)
854 switch (pccb
->cmd
[0]) {
856 ret
= ata_scsiop_read_write(pccb
, 0);
859 ret
= ata_scsiop_read_write(pccb
, 1);
861 case SCSI_RD_CAPAC10
:
862 ret
= ata_scsiop_read_capacity10(pccb
);
864 case SCSI_RD_CAPAC16
:
865 ret
= ata_scsiop_read_capacity16(pccb
);
868 ret
= ata_scsiop_test_unit_ready(pccb
);
871 ret
= ata_scsiop_inquiry(pccb
);
874 printf("Unsupport SCSI command 0x%02x\n", pccb
->cmd
[0]);
879 debug("SCSI command 0x%02x ret errno %d\n", pccb
->cmd
[0], ret
);
887 void scsi_low_level_init(int busdevfunc
)
892 #ifndef CONFIG_SCSI_AHCI_PLAT
893 ahci_init_one(busdevfunc
);
896 linkmap
= probe_ent
->link_port_map
;
898 for (i
= 0; i
< CONFIG_SYS_SCSI_MAX_SCSI_ID
; i
++) {
899 if (((linkmap
>> i
) & 0x01)) {
900 if (ahci_port_start((u8
) i
)) {
901 printf("Can not start port %d\n", i
);
904 #ifdef CONFIG_AHCI_SETFEATURES_XFER
905 ahci_set_feature((u8
) i
);
911 #ifdef CONFIG_SCSI_AHCI_PLAT
912 int ahci_init(u32 base
)
917 probe_ent
= malloc(sizeof(struct ahci_probe_ent
));
919 printf("%s: No memory for probe_ent\n", __func__
);
923 memset(probe_ent
, 0, sizeof(struct ahci_probe_ent
));
925 probe_ent
->host_flags
= ATA_FLAG_SATA
930 probe_ent
->pio_mask
= 0x1f;
931 probe_ent
->udma_mask
= 0x7f; /*Fixme,assume to support UDMA6 */
933 probe_ent
->mmio_base
= base
;
935 /* initialize adapter */
936 rc
= ahci_host_init(probe_ent
);
940 ahci_print_info(probe_ent
);
942 linkmap
= probe_ent
->link_port_map
;
944 for (i
= 0; i
< CONFIG_SYS_SCSI_MAX_SCSI_ID
; i
++) {
945 if (((linkmap
>> i
) & 0x01)) {
946 if (ahci_port_start((u8
) i
)) {
947 printf("Can not start port %d\n", i
);
950 #ifdef CONFIG_AHCI_SETFEATURES_XFER
951 ahci_set_feature((u8
) i
);
959 void __weak
scsi_init(void)
966 * In the general case of generic rotating media it makes sense to have a
967 * flush capability. It probably even makes sense in the case of SSDs because
968 * one cannot always know for sure what kind of internal cache/flush mechanism
969 * is embodied therein. At first it was planned to invoke this after the last
970 * write to disk and before rebooting. In practice, knowing, a priori, which
971 * is the last write is difficult. Because writing to the disk in u-boot is
972 * very rare, this flush command will be invoked after every block write.
974 static int ata_io_flush(u8 port
)
977 struct ahci_ioports
*pp
= &(probe_ent
->port
[port
]);
978 volatile u8
*port_mmio
= (volatile u8
*)pp
->port_mmio
;
979 u32 cmd_fis_len
= 5; /* five dwords */
983 fis
[0] = 0x27; /* Host to device FIS. */
984 fis
[1] = 1 << 7; /* Command FIS. */
985 fis
[2] = ATA_CMD_FLUSH_EXT
;
987 memcpy((unsigned char *)pp
->cmd_tbl
, fis
, 20);
988 ahci_fill_cmd_slot(pp
, cmd_fis_len
);
989 writel_with_flush(1, port_mmio
+ PORT_CMD_ISSUE
);
991 if (waiting_for_cmd_completed(port_mmio
+ PORT_CMD_ISSUE
,
992 WAIT_MS_FLUSH
, 0x1)) {
993 debug("scsi_ahci: flush command timeout on port %d.\n", port
);
1001 void scsi_bus_reset(void)
1007 void scsi_print_error(ccb
* pccb
)
1009 /*The ahci error info can be read in the ahci driver*/