2 * Copyright (C) Freescale Semiconductor, Inc. 2006.
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
31 #include <asm/processor.h>
32 #include <asm/errno.h>
37 #include <linux/ctype.h>
40 struct ahci_probe_ent *probe_ent = NULL;
41 hd_driveid_t *ataid[AHCI_MAX_PORTS];
43 #define writel_with_flush(a,b) do { writel(a,b); readl(b); } while (0)
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)
63 #define ssleep(a) msleep(a * 1000)
65 static int waiting_for_cmd_completed(volatile u8 *offset,
72 for (i = 0; ((status = readl(offset)) & sign) && i < timeout_msec; i++)
75 return (i < timeout_msec) ? 0 : -1;
79 static int ahci_host_init(struct ahci_probe_ent *probe_ent)
81 pci_dev_t pdev = probe_ent->dev;
82 volatile u8 *mmio = (volatile u8 *)probe_ent->mmio_base;
86 volatile u8 *port_mmio;
87 unsigned short vendor;
89 cap_save = readl(mmio + HOST_CAP);
90 cap_save &= ((1 << 28) | (1 << 17));
91 cap_save |= (1 << 27);
93 /* global controller reset */
94 tmp = readl(mmio + HOST_CTL);
95 if ((tmp & HOST_RESET) == 0)
96 writel_with_flush(tmp | HOST_RESET, mmio + HOST_CTL);
98 /* reset must complete within 1 second, or
99 * the hardware should be considered fried.
103 tmp = readl(mmio + HOST_CTL);
104 if (tmp & HOST_RESET) {
105 debug("controller reset failed (0x%x)\n", tmp);
109 writel_with_flush(HOST_AHCI_EN, mmio + HOST_CTL);
110 writel(cap_save, mmio + HOST_CAP);
111 writel_with_flush(0xf, mmio + HOST_PORTS_IMPL);
113 pci_read_config_word(pdev, PCI_VENDOR_ID, &vendor);
115 if (vendor == PCI_VENDOR_ID_INTEL) {
117 pci_read_config_word(pdev, 0x92, &tmp16);
119 pci_write_config_word(pdev, 0x92, tmp16);
122 probe_ent->cap = readl(mmio + HOST_CAP);
123 probe_ent->port_map = readl(mmio + HOST_PORTS_IMPL);
124 probe_ent->n_ports = (probe_ent->cap & 0x1f) + 1;
126 debug("cap 0x%x port_map 0x%x n_ports %d\n",
127 probe_ent->cap, probe_ent->port_map, probe_ent->n_ports);
129 for (i = 0; i < probe_ent->n_ports; i++) {
130 probe_ent->port[i].port_mmio = ahci_port_base((u32) mmio, i);
131 port_mmio = (u8 *) probe_ent->port[i].port_mmio;
132 ahci_setup_port(&probe_ent->port[i], (unsigned long)mmio, i);
134 /* make sure port is not active */
135 tmp = readl(port_mmio + PORT_CMD);
136 if (tmp & (PORT_CMD_LIST_ON | PORT_CMD_FIS_ON |
137 PORT_CMD_FIS_RX | PORT_CMD_START)) {
138 tmp &= ~(PORT_CMD_LIST_ON | PORT_CMD_FIS_ON |
139 PORT_CMD_FIS_RX | PORT_CMD_START);
140 writel_with_flush(tmp, port_mmio + PORT_CMD);
142 /* spec says 500 msecs for each bit, so
143 * this is slightly incorrect.
148 writel(PORT_CMD_SPIN_UP, port_mmio + PORT_CMD);
153 tmp = readl(port_mmio + PORT_SCR_STAT);
154 if ((tmp & 0xf) == 0x3)
159 tmp = readl(port_mmio + PORT_SCR_ERR);
160 debug("PORT_SCR_ERR 0x%x\n", tmp);
161 writel(tmp, port_mmio + PORT_SCR_ERR);
163 /* ack any pending irq events for this port */
164 tmp = readl(port_mmio + PORT_IRQ_STAT);
165 debug("PORT_IRQ_STAT 0x%x\n", tmp);
167 writel(tmp, port_mmio + PORT_IRQ_STAT);
169 writel(1 << i, mmio + HOST_IRQ_STAT);
171 /* set irq mask (enables interrupts) */
172 writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK);
174 /*register linkup ports */
175 tmp = readl(port_mmio + PORT_SCR_STAT);
176 debug("Port %d status: 0x%x\n", i, tmp);
177 if ((tmp & 0xf) == 0x03)
178 probe_ent->link_port_map |= (0x01 << i);
181 tmp = readl(mmio + HOST_CTL);
182 debug("HOST_CTL 0x%x\n", tmp);
183 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
184 tmp = readl(mmio + HOST_CTL);
185 debug("HOST_CTL 0x%x\n", tmp);
187 pci_read_config_word(pdev, PCI_COMMAND, &tmp16);
188 tmp |= PCI_COMMAND_MASTER;
189 pci_write_config_word(pdev, PCI_COMMAND, tmp16);
195 static void ahci_print_info(struct ahci_probe_ent *probe_ent)
197 pci_dev_t pdev = probe_ent->dev;
198 volatile u8 *mmio = (volatile u8 *)probe_ent->mmio_base;
199 u32 vers, cap, impl, speed;
204 vers = readl(mmio + HOST_VERSION);
205 cap = probe_ent->cap;
206 impl = probe_ent->port_map;
208 speed = (cap >> 20) & 0xf;
216 pci_read_config_word(pdev, 0x0a, &cc);
219 else if (cc == 0x0106)
221 else if (cc == 0x0104)
226 printf("AHCI %02x%02x.%02x%02x "
227 "%u slots %u ports %s Gbps 0x%x impl %s mode\n",
232 ((cap >> 8) & 0x1f) + 1, (cap & 0x1f) + 1, speed_s, impl, scc_s);
237 cap & (1 << 31) ? "64bit " : "",
238 cap & (1 << 30) ? "ncq " : "",
239 cap & (1 << 28) ? "ilck " : "",
240 cap & (1 << 27) ? "stag " : "",
241 cap & (1 << 26) ? "pm " : "",
242 cap & (1 << 25) ? "led " : "",
243 cap & (1 << 24) ? "clo " : "",
244 cap & (1 << 19) ? "nz " : "",
245 cap & (1 << 18) ? "only " : "",
246 cap & (1 << 17) ? "pmp " : "",
247 cap & (1 << 15) ? "pio " : "",
248 cap & (1 << 14) ? "slum " : "",
249 cap & (1 << 13) ? "part " : "");
252 static int ahci_init_one(pci_dev_t pdev)
257 memset((void *)ataid, 0, sizeof(hd_driveid_t *) * AHCI_MAX_PORTS);
259 probe_ent = malloc(sizeof(struct ahci_probe_ent));
260 memset(probe_ent, 0, sizeof(struct ahci_probe_ent));
261 probe_ent->dev = pdev;
263 probe_ent->host_flags = ATA_FLAG_SATA
268 probe_ent->pio_mask = 0x1f;
269 probe_ent->udma_mask = 0x7f; /*Fixme,assume to support UDMA6 */
271 probe_ent->mmio_base = (u32)pci_map_bar(pdev, AHCI_PCI_BAR,
275 * JMicron-specific fixup:
276 * make sure we're in AHCI mode
278 pci_read_config_word(pdev, PCI_VENDOR_ID, &vendor);
279 if (vendor == 0x197b)
280 pci_write_config_byte(pdev, 0x41, 0xa1);
282 /* initialize adapter */
283 rc = ahci_host_init(probe_ent);
287 ahci_print_info(probe_ent);
296 #define MAX_DATA_BYTE_COUNT (4*1024*1024)
298 static int ahci_fill_sg(u8 port, unsigned char *buf, int buf_len)
300 struct ahci_ioports *pp = &(probe_ent->port[port]);
301 struct ahci_sg *ahci_sg = pp->cmd_tbl_sg;
305 sg_count = ((buf_len - 1) / MAX_DATA_BYTE_COUNT) + 1;
306 if (sg_count > AHCI_MAX_SG) {
307 printf("Error:Too much sg!\n");
311 for (i = 0; i < sg_count; i++) {
313 cpu_to_le32((u32) buf + i * MAX_DATA_BYTE_COUNT);
314 ahci_sg->addr_hi = 0;
315 ahci_sg->flags_size = cpu_to_le32(0x3fffff &
316 (buf_len < MAX_DATA_BYTE_COUNT
318 : (MAX_DATA_BYTE_COUNT - 1)));
320 buf_len -= MAX_DATA_BYTE_COUNT;
327 static void ahci_fill_cmd_slot(struct ahci_ioports *pp, u32 opts)
329 pp->cmd_slot->opts = cpu_to_le32(opts);
330 pp->cmd_slot->status = 0;
331 pp->cmd_slot->tbl_addr = cpu_to_le32(pp->cmd_tbl & 0xffffffff);
332 pp->cmd_slot->tbl_addr_hi = 0;
336 static void ahci_set_feature(u8 port)
338 struct ahci_ioports *pp = &(probe_ent->port[port]);
339 volatile u8 *port_mmio = (volatile u8 *)pp->port_mmio;
340 u32 cmd_fis_len = 5; /* five dwords */
347 fis[2] = ATA_CMD_SETF;
348 fis[3] = SETFEATURES_XFER;
349 fis[12] = __ilog2(probe_ent->udma_mask + 1) + 0x40 - 0x01;
351 memcpy((unsigned char *)pp->cmd_tbl, fis, 20);
352 ahci_fill_cmd_slot(pp, cmd_fis_len);
353 writel(1, port_mmio + PORT_CMD_ISSUE);
354 readl(port_mmio + PORT_CMD_ISSUE);
356 if (waiting_for_cmd_completed(port_mmio + PORT_CMD_ISSUE, 150, 0x1)) {
357 printf("set feature error!\n");
362 static int ahci_port_start(u8 port)
364 struct ahci_ioports *pp = &(probe_ent->port[port]);
365 volatile u8 *port_mmio = (volatile u8 *)pp->port_mmio;
369 debug("Enter start port: %d\n", port);
370 port_status = readl(port_mmio + PORT_SCR_STAT);
371 debug("Port %d status: %x\n", port, port_status);
372 if ((port_status & 0xf) != 0x03) {
373 printf("No Link on this port!\n");
377 mem = (u32) malloc(AHCI_PORT_PRIV_DMA_SZ + 2048);
380 printf("No mem for table!\n");
384 mem = (mem + 0x800) & (~0x7ff); /* Aligned to 2048-bytes */
385 memset((u8 *) mem, 0, AHCI_PORT_PRIV_DMA_SZ);
388 * First item in chunk of DMA memory: 32-slot command table,
389 * 32 bytes each in size
391 pp->cmd_slot = (struct ahci_cmd_hdr *)mem;
392 debug("cmd_slot = 0x%x\n", pp->cmd_slot);
393 mem += (AHCI_CMD_SLOT_SZ + 224);
396 * Second item: Received-FIS area
399 mem += AHCI_RX_FIS_SZ;
402 * Third item: data area for storing a single command
403 * and its scatter-gather table
406 debug("cmd_tbl_dma = 0x%x\n", pp->cmd_tbl);
408 mem += AHCI_CMD_TBL_HDR;
409 pp->cmd_tbl_sg = (struct ahci_sg *)mem;
411 writel_with_flush((u32) pp->cmd_slot, port_mmio + PORT_LST_ADDR);
413 writel_with_flush(pp->rx_fis, port_mmio + PORT_FIS_ADDR);
415 writel_with_flush(PORT_CMD_ICC_ACTIVE | PORT_CMD_FIS_RX |
416 PORT_CMD_POWER_ON | PORT_CMD_SPIN_UP |
417 PORT_CMD_START, port_mmio + PORT_CMD);
419 debug("Exit start port %d\n", port);
425 static int get_ahci_device_data(u8 port, u8 *fis, int fis_len, u8 *buf,
429 struct ahci_ioports *pp = &(probe_ent->port[port]);
430 volatile u8 *port_mmio = (volatile u8 *)pp->port_mmio;
435 debug("Enter get_ahci_device_data: for port %d\n", port);
437 if (port > probe_ent->n_ports) {
438 printf("Invaild port number %d\n", port);
442 port_status = readl(port_mmio + PORT_SCR_STAT);
443 if ((port_status & 0xf) != 0x03) {
444 debug("No Link on port %d!\n", port);
448 memcpy((unsigned char *)pp->cmd_tbl, fis, fis_len);
450 sg_count = ahci_fill_sg(port, buf, buf_len);
451 opts = (fis_len >> 2) | (sg_count << 16);
452 ahci_fill_cmd_slot(pp, opts);
454 writel_with_flush(1, port_mmio + PORT_CMD_ISSUE);
456 if (waiting_for_cmd_completed(port_mmio + PORT_CMD_ISSUE, 150, 0x1)) {
457 printf("timeout exit!\n");
460 debug("get_ahci_device_data: %d byte transferred.\n",
461 pp->cmd_slot->status);
467 static char *ata_id_strcpy(u16 *target, u16 *src, int len)
470 for (i = 0; i < len / 2; i++)
471 target[i] = le16_to_cpu(src[i]);
472 return (char *)target;
476 static void dump_ataid(hd_driveid_t *ataid)
478 debug("(49)ataid->capability = 0x%x\n", ataid->capability);
479 debug("(53)ataid->field_valid =0x%x\n", ataid->field_valid);
480 debug("(63)ataid->dma_mword = 0x%x\n", ataid->dma_mword);
481 debug("(64)ataid->eide_pio_modes = 0x%x\n", ataid->eide_pio_modes);
482 debug("(75)ataid->queue_depth = 0x%x\n", ataid->queue_depth);
483 debug("(80)ataid->major_rev_num = 0x%x\n", ataid->major_rev_num);
484 debug("(81)ataid->minor_rev_num = 0x%x\n", ataid->minor_rev_num);
485 debug("(82)ataid->command_set_1 = 0x%x\n", ataid->command_set_1);
486 debug("(83)ataid->command_set_2 = 0x%x\n", ataid->command_set_2);
487 debug("(84)ataid->cfsse = 0x%x\n", ataid->cfsse);
488 debug("(85)ataid->cfs_enable_1 = 0x%x\n", ataid->cfs_enable_1);
489 debug("(86)ataid->cfs_enable_2 = 0x%x\n", ataid->cfs_enable_2);
490 debug("(87)ataid->csf_default = 0x%x\n", ataid->csf_default);
491 debug("(88)ataid->dma_ultra = 0x%x\n", ataid->dma_ultra);
492 debug("(93)ataid->hw_config = 0x%x\n", ataid->hw_config);
497 * SCSI INQUIRY command operation.
499 static int ata_scsiop_inquiry(ccb *pccb)
504 0x5, /* claim SPC-3 version compatibility */
512 /* Clean ccb data buffer */
513 memset(pccb->pdata, 0, pccb->datalen);
515 memcpy(pccb->pdata, hdr, sizeof(hdr));
517 if (pccb->datalen <= 35)
521 /* Construct the FIS */
522 fis[0] = 0x27; /* Host to device FIS. */
523 fis[1] = 1 << 7; /* Command FIS. */
524 fis[2] = ATA_CMD_IDENT; /* Command byte. */
526 /* Read id from sata */
528 if (!(tmpid = malloc(sizeof(hd_driveid_t))))
531 if (get_ahci_device_data(port, (u8 *) & fis, 20,
532 tmpid, sizeof(hd_driveid_t))) {
533 debug("scsi_ahci: SCSI inquiry command failure.\n");
539 ataid[port] = (hd_driveid_t *) tmpid;
541 memcpy(&pccb->pdata[8], "ATA ", 8);
542 ata_id_strcpy((u16 *) &pccb->pdata[16], (u16 *)ataid[port]->model, 16);
543 ata_id_strcpy((u16 *) &pccb->pdata[32], (u16 *)ataid[port]->fw_rev, 4);
545 dump_ataid(ataid[port]);
551 * SCSI READ10 command operation.
553 static int ata_scsiop_read10(ccb * pccb)
559 lba = (((u64) pccb->cmd[2]) << 24) | (((u64) pccb->cmd[3]) << 16)
560 | (((u64) pccb->cmd[4]) << 8) | ((u64) pccb->cmd[5]);
561 len = (((u32) pccb->cmd[7]) << 8) | ((u32) pccb->cmd[8]);
563 /* For 10-byte and 16-byte SCSI R/W commands, transfer
564 * length 0 means transfer 0 block of data.
565 * However, for ATA R/W commands, sector count 0 means
566 * 256 or 65536 sectors, not 0 sectors as in SCSI.
568 * WARNING: one or two older ATA drives treat 0 as 0...
574 /* Construct the FIS */
575 fis[0] = 0x27; /* Host to device FIS. */
576 fis[1] = 1 << 7; /* Command FIS. */
577 fis[2] = ATA_CMD_RD_DMA; /* Command byte. */
579 /* LBA address, only support LBA28 in this driver */
580 fis[4] = pccb->cmd[5];
581 fis[5] = pccb->cmd[4];
582 fis[6] = pccb->cmd[3];
583 fis[7] = (pccb->cmd[2] & 0x0f) | 0xe0;
586 fis[12] = pccb->cmd[8];
587 fis[13] = pccb->cmd[7];
590 if (get_ahci_device_data(pccb->target, (u8 *) & fis, 20,
591 pccb->pdata, pccb->datalen)) {
592 debug("scsi_ahci: SCSI READ10 command failure.\n");
601 * SCSI READ CAPACITY10 command operation.
603 static int ata_scsiop_read_capacity10(ccb *pccb)
607 if (!ataid[pccb->target]) {
608 printf("scsi_ahci: SCSI READ CAPACITY10 command failure. "
610 "\tPlease run SCSI commmand INQUIRY firstly!\n");
614 cap = le32_to_cpu(ataid[pccb->target]->lba_capacity);
615 memcpy(pccb->pdata, &cap, sizeof(cap));
617 pccb->pdata[4] = pccb->pdata[5] = 0;
618 pccb->pdata[6] = 512 >> 8;
619 pccb->pdata[7] = 512 & 0xff;
626 * SCSI TEST UNIT READY command operation.
628 static int ata_scsiop_test_unit_ready(ccb *pccb)
630 return (ataid[pccb->target]) ? 0 : -EPERM;
634 int scsi_exec(ccb *pccb)
638 switch (pccb->cmd[0]) {
640 ret = ata_scsiop_read10(pccb);
643 ret = ata_scsiop_read_capacity10(pccb);
646 ret = ata_scsiop_test_unit_ready(pccb);
649 ret = ata_scsiop_inquiry(pccb);
652 printf("Unsupport SCSI command 0x%02x\n", pccb->cmd[0]);
657 debug("SCSI command 0x%02x ret errno %d\n", pccb->cmd[0], ret);
665 void scsi_low_level_init(int busdevfunc)
670 ahci_init_one(busdevfunc);
672 linkmap = probe_ent->link_port_map;
674 for (i = 0; i < CONFIG_SYS_SCSI_MAX_SCSI_ID; i++) {
675 if (((linkmap >> i) & 0x01)) {
676 if (ahci_port_start((u8) i)) {
677 printf("Can not start port %d\n", i);
680 ahci_set_feature((u8) i);
686 void scsi_bus_reset(void)
692 void scsi_print_error(ccb * pccb)
694 /*The ahci error info can be read in the ahci driver*/