2 * Copyright (C) Freescale Semiconductor, Inc. 2006. All rights reserved.
3 * Author: Jason Jin<Jason.jin@freescale.com>
4 * Zhang Wei<wei.zhang@freescale.com>
6 * See file CREDITS for list of people who contributed to this
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of
12 * the License, or (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24 * with the reference on libata and ahci drvier in kernel
29 #ifdef CONFIG_SCSI_AHCI
33 #include <asm/processor.h>
34 #include <asm/errno.h>
39 #include <linux/ctype.h>
42 struct ahci_probe_ent
*probe_ent
= NULL
;
43 hd_driveid_t
*ataid
[AHCI_MAX_PORTS
];
45 #define writel_with_flush(a,b) do { writel(a,b); readl(b); } while (0)
48 static inline u32
ahci_port_base(u32 base
, u32 port
)
50 return base
+ 0x100 + (port
* 0x80);
54 static void ahci_setup_port(struct ahci_ioports
*port
, unsigned long base
,
55 unsigned int port_idx
)
57 base
= ahci_port_base(base
, port_idx
);
59 port
->cmd_addr
= base
;
60 port
->scr_addr
= base
+ PORT_SCR
;
64 #define msleep(a) udelay(a * 1000)
65 #define ssleep(a) msleep(a * 1000)
67 static int waiting_for_cmd_completed(volatile u8
*offset
,
74 for (i
= 0; ((status
= readl(offset
)) & sign
) && i
< timeout_msec
; i
++)
77 return (i
< timeout_msec
) ? 0 : -1;
81 static int ahci_host_init(struct ahci_probe_ent
*probe_ent
)
83 pci_dev_t pdev
= probe_ent
->dev
;
84 volatile u8
*mmio
= (volatile u8
*)probe_ent
->mmio_base
;
88 volatile u8
*port_mmio
;
89 unsigned short vendor
;
91 cap_save
= readl(mmio
+ HOST_CAP
);
92 cap_save
&= ((1 << 28) | (1 << 17));
93 cap_save
|= (1 << 27);
95 /* global controller reset */
96 tmp
= readl(mmio
+ HOST_CTL
);
97 if ((tmp
& HOST_RESET
) == 0)
98 writel_with_flush(tmp
| HOST_RESET
, mmio
+ HOST_CTL
);
100 /* reset must complete within 1 second, or
101 * the hardware should be considered fried.
105 tmp
= readl(mmio
+ HOST_CTL
);
106 if (tmp
& HOST_RESET
) {
107 debug("controller reset failed (0x%x)\n", tmp
);
111 writel_with_flush(HOST_AHCI_EN
, mmio
+ HOST_CTL
);
112 writel(cap_save
, mmio
+ HOST_CAP
);
113 writel_with_flush(0xf, mmio
+ HOST_PORTS_IMPL
);
115 pci_read_config_word(pdev
, PCI_VENDOR_ID
, &vendor
);
117 if (vendor
== PCI_VENDOR_ID_INTEL
) {
119 pci_read_config_word(pdev
, 0x92, &tmp16
);
121 pci_write_config_word(pdev
, 0x92, tmp16
);
124 probe_ent
->cap
= readl(mmio
+ HOST_CAP
);
125 probe_ent
->port_map
= readl(mmio
+ HOST_PORTS_IMPL
);
126 probe_ent
->n_ports
= (probe_ent
->cap
& 0x1f) + 1;
128 debug("cap 0x%x port_map 0x%x n_ports %d\n",
129 probe_ent
->cap
, probe_ent
->port_map
, probe_ent
->n_ports
);
131 for (i
= 0; i
< probe_ent
->n_ports
; i
++) {
132 probe_ent
->port
[i
].port_mmio
= ahci_port_base((u32
) mmio
, i
);
133 port_mmio
= (u8
*) probe_ent
->port
[i
].port_mmio
;
134 ahci_setup_port(&probe_ent
->port
[i
], (unsigned long)mmio
, i
);
136 /* make sure port is not active */
137 tmp
= readl(port_mmio
+ PORT_CMD
);
138 if (tmp
& (PORT_CMD_LIST_ON
| PORT_CMD_FIS_ON
|
139 PORT_CMD_FIS_RX
| PORT_CMD_START
)) {
140 tmp
&= ~(PORT_CMD_LIST_ON
| PORT_CMD_FIS_ON
|
141 PORT_CMD_FIS_RX
| PORT_CMD_START
);
142 writel_with_flush(tmp
, port_mmio
+ PORT_CMD
);
144 /* spec says 500 msecs for each bit, so
145 * this is slightly incorrect.
150 writel(PORT_CMD_SPIN_UP
, port_mmio
+ PORT_CMD
);
155 tmp
= readl(port_mmio
+ PORT_SCR_STAT
);
156 if ((tmp
& 0xf) == 0x3)
161 tmp
= readl(port_mmio
+ PORT_SCR_ERR
);
162 debug("PORT_SCR_ERR 0x%x\n", tmp
);
163 writel(tmp
, port_mmio
+ PORT_SCR_ERR
);
165 /* ack any pending irq events for this port */
166 tmp
= readl(port_mmio
+ PORT_IRQ_STAT
);
167 debug("PORT_IRQ_STAT 0x%x\n", tmp
);
169 writel(tmp
, port_mmio
+ PORT_IRQ_STAT
);
171 writel(1 << i
, mmio
+ HOST_IRQ_STAT
);
173 /* set irq mask (enables interrupts) */
174 writel(DEF_PORT_IRQ
, port_mmio
+ PORT_IRQ_MASK
);
176 /*register linkup ports */
177 tmp
= readl(port_mmio
+ PORT_SCR_STAT
);
178 debug("Port %d status: 0x%x\n", i
, tmp
);
179 if ((tmp
& 0xf) == 0x03)
180 probe_ent
->link_port_map
|= (0x01 << i
);
183 tmp
= readl(mmio
+ HOST_CTL
);
184 debug("HOST_CTL 0x%x\n", tmp
);
185 writel(tmp
| HOST_IRQ_EN
, mmio
+ HOST_CTL
);
186 tmp
= readl(mmio
+ HOST_CTL
);
187 debug("HOST_CTL 0x%x\n", tmp
);
189 pci_read_config_word(pdev
, PCI_COMMAND
, &tmp16
);
190 tmp
|= PCI_COMMAND_MASTER
;
191 pci_write_config_word(pdev
, PCI_COMMAND
, tmp16
);
197 static void ahci_print_info(struct ahci_probe_ent
*probe_ent
)
199 pci_dev_t pdev
= probe_ent
->dev
;
200 volatile u8
*mmio
= (volatile u8
*)probe_ent
->mmio_base
;
201 u32 vers
, cap
, impl
, speed
;
206 vers
= readl(mmio
+ HOST_VERSION
);
207 cap
= probe_ent
->cap
;
208 impl
= probe_ent
->port_map
;
210 speed
= (cap
>> 20) & 0xf;
218 pci_read_config_word(pdev
, 0x0a, &cc
);
221 else if (cc
== 0x0106)
223 else if (cc
== 0x0104)
228 printf("AHCI %02x%02x.%02x%02x "
229 "%u slots %u ports %s Gbps 0x%x impl %s mode\n",
234 ((cap
>> 8) & 0x1f) + 1, (cap
& 0x1f) + 1, speed_s
, impl
, scc_s
);
239 cap
& (1 << 31) ? "64bit " : "",
240 cap
& (1 << 30) ? "ncq " : "",
241 cap
& (1 << 28) ? "ilck " : "",
242 cap
& (1 << 27) ? "stag " : "",
243 cap
& (1 << 26) ? "pm " : "",
244 cap
& (1 << 25) ? "led " : "",
245 cap
& (1 << 24) ? "clo " : "",
246 cap
& (1 << 19) ? "nz " : "",
247 cap
& (1 << 18) ? "only " : "",
248 cap
& (1 << 17) ? "pmp " : "",
249 cap
& (1 << 15) ? "pio " : "",
250 cap
& (1 << 14) ? "slum " : "",
251 cap
& (1 << 13) ? "part " : "");
254 static int ahci_init_one(pci_dev_t pdev
)
260 memset((void *)ataid
, 0, sizeof(hd_driveid_t
*) * AHCI_MAX_PORTS
);
262 probe_ent
= malloc(sizeof(struct ahci_probe_ent
));
263 memset(probe_ent
, 0, sizeof(struct ahci_probe_ent
));
264 probe_ent
->dev
= pdev
;
266 pci_read_config_dword(pdev
, AHCI_PCI_BAR
, &iobase
);
269 probe_ent
->host_flags
= ATA_FLAG_SATA
274 probe_ent
->pio_mask
= 0x1f;
275 probe_ent
->udma_mask
= 0x7f; /*Fixme,assume to support UDMA6 */
277 probe_ent
->mmio_base
= iobase
;
280 * JMicron-specific fixup:
281 * make sure we're in AHCI mode
283 pci_read_config_word(pdev
, PCI_VENDOR_ID
, &vendor
);
284 if (vendor
== 0x197b)
285 pci_write_config_byte(pdev
, 0x41, 0xa1);
287 /* initialize adapter */
288 rc
= ahci_host_init(probe_ent
);
292 ahci_print_info(probe_ent
);
301 #define MAX_DATA_BYTE_COUNT (4*1024*1024)
303 static int ahci_fill_sg(u8 port
, unsigned char *buf
, int buf_len
)
305 struct ahci_ioports
*pp
= &(probe_ent
->port
[port
]);
306 struct ahci_sg
*ahci_sg
= pp
->cmd_tbl_sg
;
310 sg_count
= ((buf_len
- 1) / MAX_DATA_BYTE_COUNT
) + 1;
311 if (sg_count
> AHCI_MAX_SG
) {
312 printf("Error:Too much sg!\n");
316 for (i
= 0; i
< sg_count
; i
++) {
318 cpu_to_le32((u32
) buf
+ i
* MAX_DATA_BYTE_COUNT
);
319 ahci_sg
->addr_hi
= 0;
320 ahci_sg
->flags_size
= cpu_to_le32(0x3fffff &
321 (buf_len
< MAX_DATA_BYTE_COUNT
323 : (MAX_DATA_BYTE_COUNT
- 1)));
325 buf_len
-= MAX_DATA_BYTE_COUNT
;
332 static void ahci_fill_cmd_slot(struct ahci_ioports
*pp
, u32 opts
)
334 pp
->cmd_slot
->opts
= cpu_to_le32(opts
);
335 pp
->cmd_slot
->status
= 0;
336 pp
->cmd_slot
->tbl_addr
= cpu_to_le32(pp
->cmd_tbl
& 0xffffffff);
337 pp
->cmd_slot
->tbl_addr_hi
= 0;
341 static void ahci_set_feature(u8 port
)
343 struct ahci_ioports
*pp
= &(probe_ent
->port
[port
]);
344 volatile u8
*port_mmio
= (volatile u8
*)pp
->port_mmio
;
345 u32 cmd_fis_len
= 5; /* five dwords */
352 fis
[2] = ATA_CMD_SETF
;
353 fis
[3] = SETFEATURES_XFER
;
354 fis
[12] = __ilog2(probe_ent
->udma_mask
+ 1) + 0x40 - 0x01;
356 memcpy((unsigned char *)pp
->cmd_tbl
, fis
, 20);
357 ahci_fill_cmd_slot(pp
, cmd_fis_len
);
358 writel(1, port_mmio
+ PORT_CMD_ISSUE
);
359 readl(port_mmio
+ PORT_CMD_ISSUE
);
361 if (waiting_for_cmd_completed(port_mmio
+ PORT_CMD_ISSUE
, 150, 0x1)) {
362 printf("set feature error!\n");
367 static int ahci_port_start(u8 port
)
369 struct ahci_ioports
*pp
= &(probe_ent
->port
[port
]);
370 volatile u8
*port_mmio
= (volatile u8
*)pp
->port_mmio
;
374 debug("Enter start port: %d\n", port
);
375 port_status
= readl(port_mmio
+ PORT_SCR_STAT
);
376 debug("Port %d status: %x\n", port
, port_status
);
377 if ((port_status
& 0xf) != 0x03) {
378 printf("No Link on this port!\n");
382 mem
= (u32
) malloc(AHCI_PORT_PRIV_DMA_SZ
+ 2048);
385 printf("No mem for table!\n");
389 mem
= (mem
+ 0x800) & (~0x7ff); /* Aligned to 2048-bytes */
390 memset((u8
*) mem
, 0, AHCI_PORT_PRIV_DMA_SZ
);
393 * First item in chunk of DMA memory: 32-slot command table,
394 * 32 bytes each in size
396 pp
->cmd_slot
= (struct ahci_cmd_hdr
*)mem
;
397 debug("cmd_slot = 0x%x\n", pp
->cmd_slot
);
398 mem
+= (AHCI_CMD_SLOT_SZ
+ 224);
401 * Second item: Received-FIS area
404 mem
+= AHCI_RX_FIS_SZ
;
407 * Third item: data area for storing a single command
408 * and its scatter-gather table
411 debug("cmd_tbl_dma = 0x%x\n", pp
->cmd_tbl
);
413 mem
+= AHCI_CMD_TBL_HDR
;
414 pp
->cmd_tbl_sg
= (struct ahci_sg
*)mem
;
416 writel_with_flush((u32
) pp
->cmd_slot
, port_mmio
+ PORT_LST_ADDR
);
418 writel_with_flush(pp
->rx_fis
, port_mmio
+ PORT_FIS_ADDR
);
420 writel_with_flush(PORT_CMD_ICC_ACTIVE
| PORT_CMD_FIS_RX
|
421 PORT_CMD_POWER_ON
| PORT_CMD_SPIN_UP
|
422 PORT_CMD_START
, port_mmio
+ PORT_CMD
);
424 debug("Exit start port %d\n", port
);
430 static int get_ahci_device_data(u8 port
, u8
*fis
, int fis_len
, u8
*buf
,
434 struct ahci_ioports
*pp
= &(probe_ent
->port
[port
]);
435 volatile u8
*port_mmio
= (volatile u8
*)pp
->port_mmio
;
440 debug("Enter get_ahci_device_data: for port %d\n", port
);
442 if (port
> probe_ent
->n_ports
) {
443 printf("Invaild port number %d\n", port
);
447 port_status
= readl(port_mmio
+ PORT_SCR_STAT
);
448 if ((port_status
& 0xf) != 0x03) {
449 debug("No Link on port %d!\n", port
);
453 memcpy((unsigned char *)pp
->cmd_tbl
, fis
, fis_len
);
455 sg_count
= ahci_fill_sg(port
, buf
, buf_len
);
456 opts
= (fis_len
>> 2) | (sg_count
<< 16);
457 ahci_fill_cmd_slot(pp
, opts
);
459 writel_with_flush(1, port_mmio
+ PORT_CMD_ISSUE
);
461 if (waiting_for_cmd_completed(port_mmio
+ PORT_CMD_ISSUE
, 150, 0x1)) {
462 printf("timeout exit!\n");
465 debug("get_ahci_device_data: %d byte transferred.\n",
466 pp
->cmd_slot
->status
);
472 static char *ata_id_strcpy(u16
*target
, u16
*src
, int len
)
475 for (i
= 0; i
< len
/ 2; i
++)
476 target
[i
] = le16_to_cpu(src
[i
]);
477 return (char *)target
;
481 static void dump_ataid(hd_driveid_t
*ataid
)
483 debug("(49)ataid->capability = 0x%x\n", ataid
->capability
);
484 debug("(53)ataid->field_valid =0x%x\n", ataid
->field_valid
);
485 debug("(63)ataid->dma_mword = 0x%x\n", ataid
->dma_mword
);
486 debug("(64)ataid->eide_pio_modes = 0x%x\n", ataid
->eide_pio_modes
);
487 debug("(75)ataid->queue_depth = 0x%x\n", ataid
->queue_depth
);
488 debug("(80)ataid->major_rev_num = 0x%x\n", ataid
->major_rev_num
);
489 debug("(81)ataid->minor_rev_num = 0x%x\n", ataid
->minor_rev_num
);
490 debug("(82)ataid->command_set_1 = 0x%x\n", ataid
->command_set_1
);
491 debug("(83)ataid->command_set_2 = 0x%x\n", ataid
->command_set_2
);
492 debug("(84)ataid->cfsse = 0x%x\n", ataid
->cfsse
);
493 debug("(85)ataid->cfs_enable_1 = 0x%x\n", ataid
->cfs_enable_1
);
494 debug("(86)ataid->cfs_enable_2 = 0x%x\n", ataid
->cfs_enable_2
);
495 debug("(87)ataid->csf_default = 0x%x\n", ataid
->csf_default
);
496 debug("(88)ataid->dma_ultra = 0x%x\n", ataid
->dma_ultra
);
497 debug("(93)ataid->hw_config = 0x%x\n", ataid
->hw_config
);
502 * SCSI INQUIRY command operation.
504 static int ata_scsiop_inquiry(ccb
*pccb
)
509 0x5, /* claim SPC-3 version compatibility */
517 /* Clean ccb data buffer */
518 memset(pccb
->pdata
, 0, pccb
->datalen
);
520 memcpy(pccb
->pdata
, hdr
, sizeof(hdr
));
522 if (pccb
->datalen
<= 35)
526 /* Construct the FIS */
527 fis
[0] = 0x27; /* Host to device FIS. */
528 fis
[1] = 1 << 7; /* Command FIS. */
529 fis
[2] = ATA_CMD_IDENT
; /* Command byte. */
531 /* Read id from sata */
533 if (!(tmpid
= malloc(sizeof(hd_driveid_t
))))
536 if (get_ahci_device_data(port
, (u8
*) & fis
, 20,
537 tmpid
, sizeof(hd_driveid_t
))) {
538 debug("scsi_ahci: SCSI inquiry command failure.\n");
544 ataid
[port
] = (hd_driveid_t
*) tmpid
;
546 memcpy(&pccb
->pdata
[8], "ATA ", 8);
547 ata_id_strcpy((u16
*) &pccb
->pdata
[16], (u16
*)ataid
[port
]->model
, 16);
548 ata_id_strcpy((u16
*) &pccb
->pdata
[32], (u16
*)ataid
[port
]->fw_rev
, 4);
550 dump_ataid(ataid
[port
]);
556 * SCSI READ10 command operation.
558 static int ata_scsiop_read10(ccb
* pccb
)
564 lba
= (((u64
) pccb
->cmd
[2]) << 24) | (((u64
) pccb
->cmd
[3]) << 16)
565 | (((u64
) pccb
->cmd
[4]) << 8) | ((u64
) pccb
->cmd
[5]);
566 len
= (((u32
) pccb
->cmd
[7]) << 8) | ((u32
) pccb
->cmd
[8]);
568 /* For 10-byte and 16-byte SCSI R/W commands, transfer
569 * length 0 means transfer 0 block of data.
570 * However, for ATA R/W commands, sector count 0 means
571 * 256 or 65536 sectors, not 0 sectors as in SCSI.
573 * WARNING: one or two older ATA drives treat 0 as 0...
579 /* Construct the FIS */
580 fis
[0] = 0x27; /* Host to device FIS. */
581 fis
[1] = 1 << 7; /* Command FIS. */
582 fis
[2] = ATA_CMD_RD_DMA
; /* Command byte. */
584 /* LBA address, only support LBA28 in this driver */
585 fis
[4] = pccb
->cmd
[5];
586 fis
[5] = pccb
->cmd
[4];
587 fis
[6] = pccb
->cmd
[3];
588 fis
[7] = (pccb
->cmd
[2] & 0x0f) | 0xe0;
591 fis
[12] = pccb
->cmd
[8];
592 fis
[13] = pccb
->cmd
[7];
595 if (get_ahci_device_data(pccb
->target
, (u8
*) & fis
, 20,
596 pccb
->pdata
, pccb
->datalen
)) {
597 debug("scsi_ahci: SCSI READ10 command failure.\n");
606 * SCSI READ CAPACITY10 command operation.
608 static int ata_scsiop_read_capacity10(ccb
*pccb
)
612 if (!ataid
[pccb
->target
]) {
613 printf("scsi_ahci: SCSI READ CAPACITY10 command failure. "
615 "\tPlease run SCSI commmand INQUIRY firstly!\n");
621 *(u32
*) buf
= le32_to_cpu(ataid
[pccb
->target
]->lba_capacity
);
626 memcpy(pccb
->pdata
, buf
, 8);
633 * SCSI TEST UNIT READY command operation.
635 static int ata_scsiop_test_unit_ready(ccb
*pccb
)
637 return (ataid
[pccb
->target
]) ? 0 : -EPERM
;
641 int scsi_exec(ccb
*pccb
)
645 switch (pccb
->cmd
[0]) {
647 ret
= ata_scsiop_read10(pccb
);
650 ret
= ata_scsiop_read_capacity10(pccb
);
653 ret
= ata_scsiop_test_unit_ready(pccb
);
656 ret
= ata_scsiop_inquiry(pccb
);
659 printf("Unsupport SCSI command 0x%02x\n", pccb
->cmd
[0]);
664 debug("SCSI command 0x%02x ret errno %d\n", pccb
->cmd
[0], ret
);
672 void scsi_low_level_init(int busdevfunc
)
677 ahci_init_one(busdevfunc
);
679 linkmap
= probe_ent
->link_port_map
;
681 for (i
= 0; i
< CFG_SCSI_MAX_SCSI_ID
; i
++) {
682 if (((linkmap
>> i
) & 0x01)) {
683 if (ahci_port_start((u8
) i
)) {
684 printf("Can not start port %d\n", i
);
687 ahci_set_feature((u8
) i
);
693 void scsi_bus_reset(void)
699 void scsi_print_error(ccb
* pccb
)
701 /*The ahci error info can be read in the ahci driver*/