1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) Freescale Semiconductor, Inc. 2006.
4 * Author: Jason Jin<Jason.jin@freescale.com>
5 * Zhang Wei<wei.zhang@freescale.com>
7 * with the reference on libata and ahci drvier in kernel
9 * This driver provides a SCSI interface to SATA.
16 #include <asm/processor.h>
17 #include <linux/errno.h>
24 #include <linux/ctype.h>
26 #include <dm/device-internal.h>
29 static int ata_io_flush(struct ahci_uc_priv *uc_priv, u8 port);
31 #ifndef CONFIG_DM_SCSI
32 struct ahci_uc_priv *probe_ent = NULL;
35 #define writel_with_flush(a,b) do { writel(a,b); readl(b); } while (0)
38 * Some controllers limit number of blocks they can read/write at once.
39 * Contemporary SSD devices work much faster if the read/write size is aligned
40 * to a power of 2. Let's set default to 128 and allowing to be overwritten if
43 #ifndef MAX_SATA_BLOCKS_READ_WRITE
44 #define MAX_SATA_BLOCKS_READ_WRITE 0x80
47 /* Maximum timeouts for each event */
48 #define WAIT_MS_SPINUP 20000
49 #define WAIT_MS_DATAIO 10000
50 #define WAIT_MS_FLUSH 5000
51 #define WAIT_MS_LINKUP 200
53 __weak void __iomem *ahci_port_base(void __iomem *base, u32 port)
55 return base + 0x100 + (port * 0x80);
59 static void ahci_setup_port(struct ahci_ioports *port, void __iomem *base,
60 unsigned int port_idx)
62 base = ahci_port_base(base, port_idx);
64 port->cmd_addr = base;
65 port->scr_addr = base + PORT_SCR;
69 #define msleep(a) udelay(a * 1000)
71 static void ahci_dcache_flush_range(unsigned long begin, unsigned long len)
73 const unsigned long start = begin;
74 const unsigned long end = start + len;
76 debug("%s: flush dcache: [%#lx, %#lx)\n", __func__, start, end);
77 flush_dcache_range(start, end);
81 * SATA controller DMAs to physical RAM. Ensure data from the
82 * controller is invalidated from dcache; next access comes from
85 static void ahci_dcache_invalidate_range(unsigned long begin, unsigned long len)
87 const unsigned long start = begin;
88 const unsigned long end = start + len;
90 debug("%s: invalidate dcache: [%#lx, %#lx)\n", __func__, start, end);
91 invalidate_dcache_range(start, end);
95 * Ensure data for SATA controller is flushed out of dcache and
96 * written to physical memory.
98 static void ahci_dcache_flush_sata_cmd(struct ahci_ioports *pp)
100 ahci_dcache_flush_range((unsigned long)pp->cmd_slot,
101 AHCI_PORT_PRIV_DMA_SZ);
104 static int waiting_for_cmd_completed(void __iomem *offset,
111 for (i = 0; ((status = readl(offset)) & sign) && i < timeout_msec; i++)
114 return (i < timeout_msec) ? 0 : -1;
117 int __weak ahci_link_up(struct ahci_uc_priv *uc_priv, u8 port)
121 void __iomem *port_mmio = uc_priv->port[port].port_mmio;
124 * Bring up SATA link.
125 * SATA link bringup time is usually less than 1 ms; only very
126 * rarely has it taken between 1-2 ms. Never seen it above 2 ms.
128 while (j < WAIT_MS_LINKUP) {
129 tmp = readl(port_mmio + PORT_SCR_STAT);
130 tmp &= PORT_SCR_STAT_DET_MASK;
131 if (tmp == PORT_SCR_STAT_DET_PHYRDY)
139 #ifdef CONFIG_SUNXI_AHCI
140 /* The sunxi AHCI controller requires this undocumented setup */
141 static void sunxi_dma_init(void __iomem *port_mmio)
143 clrsetbits_le32(port_mmio + PORT_P0DMACR, 0x0000ff00, 0x00004400);
147 int ahci_reset(void __iomem *base)
150 u32 __iomem *host_ctl_reg = base + HOST_CTL;
151 u32 tmp = readl(host_ctl_reg); /* global controller reset */
153 if ((tmp & HOST_RESET) == 0)
154 writel_with_flush(tmp | HOST_RESET, host_ctl_reg);
157 * reset must complete within 1 second, or
158 * the hardware should be considered fried.
162 tmp = readl(host_ctl_reg);
164 } while ((i > 0) && (tmp & HOST_RESET));
167 printf("controller reset failed (0x%x)\n", tmp);
174 static int ahci_host_init(struct ahci_uc_priv *uc_priv)
176 #if !defined(CONFIG_SCSI_AHCI_PLAT) && !defined(CONFIG_DM_SCSI)
177 # ifdef CONFIG_DM_PCI
178 struct udevice *dev = uc_priv->dev;
179 struct pci_child_platdata *pplat = dev_get_parent_platdata(dev);
181 pci_dev_t pdev = uc_priv->dev;
182 unsigned short vendor;
186 void __iomem *mmio = uc_priv->mmio_base;
187 u32 tmp, cap_save, cmd;
189 void __iomem *port_mmio;
192 debug("ahci_host_init: start\n");
194 cap_save = readl(mmio + HOST_CAP);
195 cap_save &= ((1 << 28) | (1 << 17));
196 cap_save |= (1 << 27); /* Staggered Spin-up. Not needed. */
198 ret = ahci_reset(uc_priv->mmio_base);
202 writel_with_flush(HOST_AHCI_EN, mmio + HOST_CTL);
203 writel(cap_save, mmio + HOST_CAP);
204 writel_with_flush(0xf, mmio + HOST_PORTS_IMPL);
206 #if !defined(CONFIG_SCSI_AHCI_PLAT) && !defined(CONFIG_DM_SCSI)
207 # ifdef CONFIG_DM_PCI
208 if (pplat->vendor == PCI_VENDOR_ID_INTEL) {
211 dm_pci_read_config16(dev, 0x92, &tmp16);
212 dm_pci_write_config16(dev, 0x92, tmp16 | 0xf);
215 pci_read_config_word(pdev, PCI_VENDOR_ID, &vendor);
217 if (vendor == PCI_VENDOR_ID_INTEL) {
219 pci_read_config_word(pdev, 0x92, &tmp16);
221 pci_write_config_word(pdev, 0x92, tmp16);
225 uc_priv->cap = readl(mmio + HOST_CAP);
226 uc_priv->port_map = readl(mmio + HOST_PORTS_IMPL);
227 port_map = uc_priv->port_map;
228 uc_priv->n_ports = (uc_priv->cap & 0x1f) + 1;
230 debug("cap 0x%x port_map 0x%x n_ports %d\n",
231 uc_priv->cap, uc_priv->port_map, uc_priv->n_ports);
233 #if !defined(CONFIG_DM_SCSI)
234 if (uc_priv->n_ports > CONFIG_SYS_SCSI_MAX_SCSI_ID)
235 uc_priv->n_ports = CONFIG_SYS_SCSI_MAX_SCSI_ID;
238 for (i = 0; i < uc_priv->n_ports; i++) {
239 if (!(port_map & (1 << i)))
241 uc_priv->port[i].port_mmio = ahci_port_base(mmio, i);
242 port_mmio = (u8 *)uc_priv->port[i].port_mmio;
243 ahci_setup_port(&uc_priv->port[i], mmio, i);
245 /* make sure port is not active */
246 tmp = readl(port_mmio + PORT_CMD);
247 if (tmp & (PORT_CMD_LIST_ON | PORT_CMD_FIS_ON |
248 PORT_CMD_FIS_RX | PORT_CMD_START)) {
249 debug("Port %d is active. Deactivating.\n", i);
250 tmp &= ~(PORT_CMD_LIST_ON | PORT_CMD_FIS_ON |
251 PORT_CMD_FIS_RX | PORT_CMD_START);
252 writel_with_flush(tmp, port_mmio + PORT_CMD);
254 /* spec says 500 msecs for each bit, so
255 * this is slightly incorrect.
260 #ifdef CONFIG_SUNXI_AHCI
261 sunxi_dma_init(port_mmio);
264 /* Add the spinup command to whatever mode bits may
265 * already be on in the command register.
267 cmd = readl(port_mmio + PORT_CMD);
268 cmd |= PORT_CMD_SPIN_UP;
269 writel_with_flush(cmd, port_mmio + PORT_CMD);
271 /* Bring up SATA link. */
272 ret = ahci_link_up(uc_priv, i);
274 printf("SATA link %d timeout.\n", i);
277 debug("SATA link ok.\n");
280 /* Clear error status */
281 tmp = readl(port_mmio + PORT_SCR_ERR);
283 writel(tmp, port_mmio + PORT_SCR_ERR);
285 debug("Spinning up device on SATA port %d... ", i);
288 while (j < WAIT_MS_SPINUP) {
289 tmp = readl(port_mmio + PORT_TFDATA);
290 if (!(tmp & (ATA_BUSY | ATA_DRQ)))
293 tmp = readl(port_mmio + PORT_SCR_STAT);
294 tmp &= PORT_SCR_STAT_DET_MASK;
295 if (tmp == PORT_SCR_STAT_DET_PHYRDY)
300 tmp = readl(port_mmio + PORT_SCR_STAT) & PORT_SCR_STAT_DET_MASK;
301 if (tmp == PORT_SCR_STAT_DET_COMINIT) {
302 debug("SATA link %d down (COMINIT received), retrying...\n", i);
307 printf("Target spinup took %d ms.\n", j);
308 if (j == WAIT_MS_SPINUP)
313 tmp = readl(port_mmio + PORT_SCR_ERR);
314 debug("PORT_SCR_ERR 0x%x\n", tmp);
315 writel(tmp, port_mmio + PORT_SCR_ERR);
317 /* ack any pending irq events for this port */
318 tmp = readl(port_mmio + PORT_IRQ_STAT);
319 debug("PORT_IRQ_STAT 0x%x\n", tmp);
321 writel(tmp, port_mmio + PORT_IRQ_STAT);
323 writel(1 << i, mmio + HOST_IRQ_STAT);
325 /* register linkup ports */
326 tmp = readl(port_mmio + PORT_SCR_STAT);
327 debug("SATA port %d status: 0x%x\n", i, tmp);
328 if ((tmp & PORT_SCR_STAT_DET_MASK) == PORT_SCR_STAT_DET_PHYRDY)
329 uc_priv->link_port_map |= (0x01 << i);
332 tmp = readl(mmio + HOST_CTL);
333 debug("HOST_CTL 0x%x\n", tmp);
334 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
335 tmp = readl(mmio + HOST_CTL);
336 debug("HOST_CTL 0x%x\n", tmp);
337 #if !defined(CONFIG_DM_SCSI)
338 #ifndef CONFIG_SCSI_AHCI_PLAT
339 # ifdef CONFIG_DM_PCI
340 dm_pci_read_config16(dev, PCI_COMMAND, &tmp16);
341 tmp |= PCI_COMMAND_MASTER;
342 dm_pci_write_config16(dev, PCI_COMMAND, tmp16);
344 pci_read_config_word(pdev, PCI_COMMAND, &tmp16);
345 tmp |= PCI_COMMAND_MASTER;
346 pci_write_config_word(pdev, PCI_COMMAND, tmp16);
354 static void ahci_print_info(struct ahci_uc_priv *uc_priv)
356 #if !defined(CONFIG_SCSI_AHCI_PLAT) && !defined(CONFIG_DM_SCSI)
357 # if defined(CONFIG_DM_PCI)
358 struct udevice *dev = uc_priv->dev;
360 pci_dev_t pdev = uc_priv->dev;
364 void __iomem *mmio = uc_priv->mmio_base;
365 u32 vers, cap, cap2, impl, speed;
369 vers = readl(mmio + HOST_VERSION);
371 cap2 = readl(mmio + HOST_CAP2);
372 impl = uc_priv->port_map;
374 speed = (cap >> 20) & 0xf;
384 #if defined(CONFIG_SCSI_AHCI_PLAT) || defined(CONFIG_DM_SCSI)
387 # ifdef CONFIG_DM_PCI
388 dm_pci_read_config16(dev, 0x0a, &cc);
390 pci_read_config_word(pdev, 0x0a, &cc);
394 else if (cc == 0x0106)
396 else if (cc == 0x0104)
401 printf("AHCI %02x%02x.%02x%02x "
402 "%u slots %u ports %s Gbps 0x%x impl %s mode\n",
407 ((cap >> 8) & 0x1f) + 1, (cap & 0x1f) + 1, speed_s, impl, scc_s);
413 cap & (1 << 31) ? "64bit " : "",
414 cap & (1 << 30) ? "ncq " : "",
415 cap & (1 << 28) ? "ilck " : "",
416 cap & (1 << 27) ? "stag " : "",
417 cap & (1 << 26) ? "pm " : "",
418 cap & (1 << 25) ? "led " : "",
419 cap & (1 << 24) ? "clo " : "",
420 cap & (1 << 19) ? "nz " : "",
421 cap & (1 << 18) ? "only " : "",
422 cap & (1 << 17) ? "pmp " : "",
423 cap & (1 << 16) ? "fbss " : "",
424 cap & (1 << 15) ? "pio " : "",
425 cap & (1 << 14) ? "slum " : "",
426 cap & (1 << 13) ? "part " : "",
427 cap & (1 << 7) ? "ccc " : "",
428 cap & (1 << 6) ? "ems " : "",
429 cap & (1 << 5) ? "sxs " : "",
430 cap2 & (1 << 2) ? "apst " : "",
431 cap2 & (1 << 1) ? "nvmp " : "",
432 cap2 & (1 << 0) ? "boh " : "");
435 #if defined(CONFIG_DM_SCSI) || !defined(CONFIG_SCSI_AHCI_PLAT)
436 # if defined(CONFIG_DM_PCI) || defined(CONFIG_DM_SCSI)
437 static int ahci_init_one(struct ahci_uc_priv *uc_priv, struct udevice *dev)
439 static int ahci_init_one(struct ahci_uc_priv *uc_priv, pci_dev_t dev)
442 #if !defined(CONFIG_DM_SCSI)
449 uc_priv->host_flags = ATA_FLAG_SATA
454 uc_priv->pio_mask = 0x1f;
455 uc_priv->udma_mask = 0x7f; /*Fixme,assume to support UDMA6 */
457 #if !defined(CONFIG_DM_SCSI)
459 uc_priv->mmio_base = dm_pci_map_bar(dev, PCI_BASE_ADDRESS_5,
463 * JMicron-specific fixup:
464 * make sure we're in AHCI mode
466 dm_pci_read_config16(dev, PCI_VENDOR_ID, &vendor);
467 if (vendor == 0x197b)
468 dm_pci_write_config8(dev, 0x41, 0xa1);
470 uc_priv->mmio_base = pci_map_bar(dev, PCI_BASE_ADDRESS_5,
474 * JMicron-specific fixup:
475 * make sure we're in AHCI mode
477 pci_read_config_word(dev, PCI_VENDOR_ID, &vendor);
478 if (vendor == 0x197b)
479 pci_write_config_byte(dev, 0x41, 0xa1);
482 struct scsi_platdata *plat = dev_get_uclass_platdata(dev);
483 uc_priv->mmio_base = (void *)plat->base;
486 debug("ahci mmio_base=0x%p\n", uc_priv->mmio_base);
487 /* initialize adapter */
488 rc = ahci_host_init(uc_priv);
492 ahci_print_info(uc_priv);
501 #define MAX_DATA_BYTE_COUNT (4*1024*1024)
503 static int ahci_fill_sg(struct ahci_uc_priv *uc_priv, u8 port,
504 unsigned char *buf, int buf_len)
506 struct ahci_ioports *pp = &(uc_priv->port[port]);
507 struct ahci_sg *ahci_sg = pp->cmd_tbl_sg;
511 sg_count = ((buf_len - 1) / MAX_DATA_BYTE_COUNT) + 1;
512 if (sg_count > AHCI_MAX_SG) {
513 printf("Error:Too much sg!\n");
517 for (i = 0; i < sg_count; i++) {
519 cpu_to_le32((unsigned long) buf + i * MAX_DATA_BYTE_COUNT);
520 ahci_sg->addr_hi = 0;
521 ahci_sg->flags_size = cpu_to_le32(0x3fffff &
522 (buf_len < MAX_DATA_BYTE_COUNT
524 : (MAX_DATA_BYTE_COUNT - 1)));
526 buf_len -= MAX_DATA_BYTE_COUNT;
533 static void ahci_fill_cmd_slot(struct ahci_ioports *pp, u32 opts)
535 pp->cmd_slot->opts = cpu_to_le32(opts);
536 pp->cmd_slot->status = 0;
537 pp->cmd_slot->tbl_addr = cpu_to_le32((u32)pp->cmd_tbl & 0xffffffff);
538 #ifdef CONFIG_PHYS_64BIT
539 pp->cmd_slot->tbl_addr_hi =
540 cpu_to_le32((u32)(((pp->cmd_tbl) >> 16) >> 16));
544 static int wait_spinup(void __iomem *port_mmio)
549 start = get_timer(0);
551 tf_data = readl(port_mmio + PORT_TFDATA);
552 if (!(tf_data & ATA_BUSY))
554 } while (get_timer(start) < WAIT_MS_SPINUP);
559 static int ahci_port_start(struct ahci_uc_priv *uc_priv, u8 port)
561 struct ahci_ioports *pp = &(uc_priv->port[port]);
562 void __iomem *port_mmio = pp->port_mmio;
566 debug("Enter start port: %d\n", port);
567 port_status = readl(port_mmio + PORT_SCR_STAT);
568 debug("Port %d status: %x\n", port, port_status);
569 if ((port_status & 0xf) != 0x03) {
570 printf("No Link on this port!\n");
574 mem = malloc(AHCI_PORT_PRIV_DMA_SZ + 2048);
577 printf("%s: No mem for table!\n", __func__);
581 /* Aligned to 2048-bytes */
582 mem = memalign(2048, AHCI_PORT_PRIV_DMA_SZ);
583 memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ);
586 * First item in chunk of DMA memory: 32-slot command table,
587 * 32 bytes each in size
590 (struct ahci_cmd_hdr *)(uintptr_t)virt_to_phys((void *)mem);
591 debug("cmd_slot = %p\n", pp->cmd_slot);
592 mem += (AHCI_CMD_SLOT_SZ + 224);
595 * Second item: Received-FIS area
597 pp->rx_fis = virt_to_phys((void *)mem);
598 mem += AHCI_RX_FIS_SZ;
601 * Third item: data area for storing a single command
602 * and its scatter-gather table
604 pp->cmd_tbl = virt_to_phys((void *)mem);
605 debug("cmd_tbl_dma = %lx\n", pp->cmd_tbl);
607 mem += AHCI_CMD_TBL_HDR;
609 (struct ahci_sg *)(uintptr_t)virt_to_phys((void *)mem);
611 writel_with_flush((unsigned long)pp->cmd_slot,
612 port_mmio + PORT_LST_ADDR);
614 writel_with_flush(pp->rx_fis, port_mmio + PORT_FIS_ADDR);
616 #ifdef CONFIG_SUNXI_AHCI
617 sunxi_dma_init(port_mmio);
620 writel_with_flush(PORT_CMD_ICC_ACTIVE | PORT_CMD_FIS_RX |
621 PORT_CMD_POWER_ON | PORT_CMD_SPIN_UP |
622 PORT_CMD_START, port_mmio + PORT_CMD);
624 debug("Exit start port %d\n", port);
627 * Make sure interface is not busy based on error and status
628 * information from task file data register before proceeding
630 return wait_spinup(port_mmio);
634 static int ahci_device_data_io(struct ahci_uc_priv *uc_priv, u8 port, u8 *fis,
635 int fis_len, u8 *buf, int buf_len, u8 is_write)
638 struct ahci_ioports *pp = &(uc_priv->port[port]);
639 void __iomem *port_mmio = pp->port_mmio;
644 debug("Enter %s: for port %d\n", __func__, port);
646 if (port > uc_priv->n_ports) {
647 printf("Invalid port number %d\n", port);
651 port_status = readl(port_mmio + PORT_SCR_STAT);
652 if ((port_status & 0xf) != 0x03) {
653 debug("No Link on port %d!\n", port);
657 memcpy((unsigned char *)pp->cmd_tbl, fis, fis_len);
659 sg_count = ahci_fill_sg(uc_priv, port, buf, buf_len);
660 opts = (fis_len >> 2) | (sg_count << 16) | (is_write << 6);
661 ahci_fill_cmd_slot(pp, opts);
663 ahci_dcache_flush_sata_cmd(pp);
664 ahci_dcache_flush_range((unsigned long)buf, (unsigned long)buf_len);
666 writel_with_flush(1, port_mmio + PORT_CMD_ISSUE);
668 if (waiting_for_cmd_completed(port_mmio + PORT_CMD_ISSUE,
669 WAIT_MS_DATAIO, 0x1)) {
670 printf("timeout exit!\n");
674 ahci_dcache_invalidate_range((unsigned long)buf,
675 (unsigned long)buf_len);
676 debug("%s: %d byte transferred.\n", __func__, pp->cmd_slot->status);
682 static char *ata_id_strcpy(u16 *target, u16 *src, int len)
685 for (i = 0; i < len / 2; i++)
686 target[i] = swab16(src[i]);
687 return (char *)target;
691 * SCSI INQUIRY command operation.
693 static int ata_scsiop_inquiry(struct ahci_uc_priv *uc_priv,
694 struct scsi_cmd *pccb)
696 static const u8 hdr[] = {
699 0x5, /* claim SPC-3 version compatibility */
705 ALLOC_CACHE_ALIGN_BUFFER(u16, tmpid, ATA_ID_WORDS);
708 /* Clean ccb data buffer */
709 memset(pccb->pdata, 0, pccb->datalen);
711 memcpy(pccb->pdata, hdr, sizeof(hdr));
713 if (pccb->datalen <= 35)
716 memset(fis, 0, sizeof(fis));
717 /* Construct the FIS */
718 fis[0] = 0x27; /* Host to device FIS. */
719 fis[1] = 1 << 7; /* Command FIS. */
720 fis[2] = ATA_CMD_ID_ATA; /* Command byte. */
722 /* Read id from sata */
725 if (ahci_device_data_io(uc_priv, port, (u8 *)&fis, sizeof(fis),
726 (u8 *)tmpid, ATA_ID_WORDS * 2, 0)) {
727 debug("scsi_ahci: SCSI inquiry command failure.\n");
731 if (!uc_priv->ataid[port]) {
732 uc_priv->ataid[port] = malloc(ATA_ID_WORDS * 2);
733 if (!uc_priv->ataid[port]) {
734 printf("%s: No memory for ataid[port]\n", __func__);
739 idbuf = uc_priv->ataid[port];
741 memcpy(idbuf, tmpid, ATA_ID_WORDS * 2);
742 ata_swap_buf_le16(idbuf, ATA_ID_WORDS);
744 memcpy(&pccb->pdata[8], "ATA ", 8);
745 ata_id_strcpy((u16 *)&pccb->pdata[16], &idbuf[ATA_ID_PROD], 16);
746 ata_id_strcpy((u16 *)&pccb->pdata[32], &idbuf[ATA_ID_FW_REV], 4);
756 * SCSI READ10/WRITE10 command operation.
758 static int ata_scsiop_read_write(struct ahci_uc_priv *uc_priv,
759 struct scsi_cmd *pccb, u8 is_write)
764 u8 *user_buffer = pccb->pdata;
765 u32 user_buffer_size = pccb->datalen;
767 /* Retrieve the base LBA number from the ccb structure. */
768 if (pccb->cmd[0] == SCSI_READ16) {
769 memcpy(&lba, pccb->cmd + 2, 8);
770 lba = be64_to_cpu(lba);
773 memcpy(&temp, pccb->cmd + 2, 4);
774 lba = be32_to_cpu(temp);
778 * Retrieve the base LBA number and the block count from
781 * For 10-byte and 16-byte SCSI R/W commands, transfer
782 * length 0 means transfer 0 block of data.
783 * However, for ATA R/W commands, sector count 0 means
784 * 256 or 65536 sectors, not 0 sectors as in SCSI.
786 * WARNING: one or two older ATA drives treat 0 as 0...
788 if (pccb->cmd[0] == SCSI_READ16)
789 blocks = (((u16)pccb->cmd[13]) << 8) | ((u16) pccb->cmd[14]);
791 blocks = (((u16)pccb->cmd[7]) << 8) | ((u16) pccb->cmd[8]);
793 debug("scsi_ahci: %s %u blocks starting from lba 0x" LBAFU "\n",
794 is_write ? "write" : "read", blocks, lba);
797 memset(fis, 0, sizeof(fis));
798 fis[0] = 0x27; /* Host to device FIS. */
799 fis[1] = 1 << 7; /* Command FIS. */
800 /* Command byte (read/write). */
801 fis[2] = is_write ? ATA_CMD_WRITE_EXT : ATA_CMD_READ_EXT;
804 u16 now_blocks; /* number of blocks per iteration */
805 u32 transfer_size; /* number of bytes per iteration */
807 now_blocks = min((u16)MAX_SATA_BLOCKS_READ_WRITE, blocks);
809 transfer_size = ATA_SECT_SIZE * now_blocks;
810 if (transfer_size > user_buffer_size) {
811 printf("scsi_ahci: Error: buffer too small.\n");
816 * LBA48 SATA command but only use 32bit address range within
817 * that (unless we've enabled 64bit LBA support). The next
818 * smaller command range (28bit) is too small.
820 fis[4] = (lba >> 0) & 0xff;
821 fis[5] = (lba >> 8) & 0xff;
822 fis[6] = (lba >> 16) & 0xff;
823 fis[7] = 1 << 6; /* device reg: set LBA mode */
824 fis[8] = ((lba >> 24) & 0xff);
825 #ifdef CONFIG_SYS_64BIT_LBA
826 if (pccb->cmd[0] == SCSI_READ16) {
827 fis[9] = ((lba >> 32) & 0xff);
828 fis[10] = ((lba >> 40) & 0xff);
832 fis[3] = 0xe0; /* features */
834 /* Block (sector) count */
835 fis[12] = (now_blocks >> 0) & 0xff;
836 fis[13] = (now_blocks >> 8) & 0xff;
838 /* Read/Write from ahci */
839 if (ahci_device_data_io(uc_priv, pccb->target, (u8 *)&fis,
840 sizeof(fis), user_buffer, transfer_size,
842 debug("scsi_ahci: SCSI %s10 command failure.\n",
843 is_write ? "WRITE" : "READ");
847 /* If this transaction is a write, do a following flush.
848 * Writes in u-boot are so rare, and the logic to know when is
849 * the last write and do a flush only there is sufficiently
850 * difficult. Just do a flush after every write. This incurs,
851 * usually, one extra flush when the rare writes do happen.
854 if (-EIO == ata_io_flush(uc_priv, pccb->target))
857 user_buffer += transfer_size;
858 user_buffer_size -= transfer_size;
859 blocks -= now_blocks;
868 * SCSI READ CAPACITY10 command operation.
870 static int ata_scsiop_read_capacity10(struct ahci_uc_priv *uc_priv,
871 struct scsi_cmd *pccb)
877 if (!uc_priv->ataid[pccb->target]) {
878 printf("scsi_ahci: SCSI READ CAPACITY10 command failure. "
880 "\tPlease run SCSI command INQUIRY first!\n");
884 cap64 = ata_id_n_sectors(uc_priv->ataid[pccb->target]);
885 if (cap64 > 0x100000000ULL)
888 cap = cpu_to_be32(cap64);
889 memcpy(pccb->pdata, &cap, sizeof(cap));
891 block_size = cpu_to_be32((u32)512);
892 memcpy(&pccb->pdata[4], &block_size, 4);
899 * SCSI READ CAPACITY16 command operation.
901 static int ata_scsiop_read_capacity16(struct ahci_uc_priv *uc_priv,
902 struct scsi_cmd *pccb)
907 if (!uc_priv->ataid[pccb->target]) {
908 printf("scsi_ahci: SCSI READ CAPACITY16 command failure. "
910 "\tPlease run SCSI command INQUIRY first!\n");
914 cap = ata_id_n_sectors(uc_priv->ataid[pccb->target]);
915 cap = cpu_to_be64(cap);
916 memcpy(pccb->pdata, &cap, sizeof(cap));
918 block_size = cpu_to_be64((u64)512);
919 memcpy(&pccb->pdata[8], &block_size, 8);
926 * SCSI TEST UNIT READY command operation.
928 static int ata_scsiop_test_unit_ready(struct ahci_uc_priv *uc_priv,
929 struct scsi_cmd *pccb)
931 return (uc_priv->ataid[pccb->target]) ? 0 : -EPERM;
935 static int ahci_scsi_exec(struct udevice *dev, struct scsi_cmd *pccb)
937 struct ahci_uc_priv *uc_priv;
938 #ifdef CONFIG_DM_SCSI
939 uc_priv = dev_get_uclass_priv(dev->parent);
945 switch (pccb->cmd[0]) {
948 ret = ata_scsiop_read_write(uc_priv, pccb, 0);
951 ret = ata_scsiop_read_write(uc_priv, pccb, 1);
953 case SCSI_RD_CAPAC10:
954 ret = ata_scsiop_read_capacity10(uc_priv, pccb);
956 case SCSI_RD_CAPAC16:
957 ret = ata_scsiop_read_capacity16(uc_priv, pccb);
960 ret = ata_scsiop_test_unit_ready(uc_priv, pccb);
963 ret = ata_scsiop_inquiry(uc_priv, pccb);
966 printf("Unsupport SCSI command 0x%02x\n", pccb->cmd[0]);
971 debug("SCSI command 0x%02x ret errno %d\n", pccb->cmd[0], ret);
978 static int ahci_start_ports(struct ahci_uc_priv *uc_priv)
983 linkmap = uc_priv->link_port_map;
985 for (i = 0; i < uc_priv->n_ports; i++) {
986 if (((linkmap >> i) & 0x01)) {
987 if (ahci_port_start(uc_priv, (u8) i)) {
988 printf("Can not start port %d\n", i);
997 #ifndef CONFIG_DM_SCSI
998 void scsi_low_level_init(int busdevfunc)
1000 struct ahci_uc_priv *uc_priv;
1002 #ifndef CONFIG_SCSI_AHCI_PLAT
1003 probe_ent = calloc(1, sizeof(struct ahci_uc_priv));
1005 printf("%s: No memory for uc_priv\n", __func__);
1008 uc_priv = probe_ent;
1009 # if defined(CONFIG_DM_PCI)
1010 struct udevice *dev;
1013 ret = dm_pci_bus_find_bdf(busdevfunc, &dev);
1016 ahci_init_one(uc_priv, dev);
1018 ahci_init_one(uc_priv, busdevfunc);
1021 uc_priv = probe_ent;
1024 ahci_start_ports(uc_priv);
1028 #ifndef CONFIG_SCSI_AHCI_PLAT
1029 # if defined(CONFIG_DM_PCI) || defined(CONFIG_DM_SCSI)
1030 int ahci_init_one_dm(struct udevice *dev)
1032 struct ahci_uc_priv *uc_priv = dev_get_uclass_priv(dev);
1034 return ahci_init_one(uc_priv, dev);
1039 int ahci_start_ports_dm(struct udevice *dev)
1041 struct ahci_uc_priv *uc_priv = dev_get_uclass_priv(dev);
1043 return ahci_start_ports(uc_priv);
1046 #ifdef CONFIG_SCSI_AHCI_PLAT
1047 static int ahci_init_common(struct ahci_uc_priv *uc_priv, void __iomem *base)
1051 uc_priv->host_flags = ATA_FLAG_SATA
1052 | ATA_FLAG_NO_LEGACY
1055 | ATA_FLAG_NO_ATAPI;
1056 uc_priv->pio_mask = 0x1f;
1057 uc_priv->udma_mask = 0x7f; /*Fixme,assume to support UDMA6 */
1059 uc_priv->mmio_base = base;
1061 /* initialize adapter */
1062 rc = ahci_host_init(uc_priv);
1066 ahci_print_info(uc_priv);
1068 rc = ahci_start_ports(uc_priv);
1074 #ifndef CONFIG_DM_SCSI
1075 int ahci_init(void __iomem *base)
1077 struct ahci_uc_priv *uc_priv;
1079 probe_ent = malloc(sizeof(struct ahci_uc_priv));
1081 printf("%s: No memory for uc_priv\n", __func__);
1085 uc_priv = probe_ent;
1086 memset(uc_priv, 0, sizeof(struct ahci_uc_priv));
1088 return ahci_init_common(uc_priv, base);
1092 int ahci_init_dm(struct udevice *dev, void __iomem *base)
1094 struct ahci_uc_priv *uc_priv = dev_get_uclass_priv(dev);
1096 return ahci_init_common(uc_priv, base);
1099 void __weak scsi_init(void)
1103 #endif /* CONFIG_SCSI_AHCI_PLAT */
1106 * In the general case of generic rotating media it makes sense to have a
1107 * flush capability. It probably even makes sense in the case of SSDs because
1108 * one cannot always know for sure what kind of internal cache/flush mechanism
1109 * is embodied therein. At first it was planned to invoke this after the last
1110 * write to disk and before rebooting. In practice, knowing, a priori, which
1111 * is the last write is difficult. Because writing to the disk in u-boot is
1112 * very rare, this flush command will be invoked after every block write.
1114 static int ata_io_flush(struct ahci_uc_priv *uc_priv, u8 port)
1117 struct ahci_ioports *pp = &(uc_priv->port[port]);
1118 void __iomem *port_mmio = pp->port_mmio;
1119 u32 cmd_fis_len = 5; /* five dwords */
1121 /* Preset the FIS */
1123 fis[0] = 0x27; /* Host to device FIS. */
1124 fis[1] = 1 << 7; /* Command FIS. */
1125 fis[2] = ATA_CMD_FLUSH_EXT;
1127 memcpy((unsigned char *)pp->cmd_tbl, fis, 20);
1128 ahci_fill_cmd_slot(pp, cmd_fis_len);
1129 ahci_dcache_flush_sata_cmd(pp);
1130 writel_with_flush(1, port_mmio + PORT_CMD_ISSUE);
1132 if (waiting_for_cmd_completed(port_mmio + PORT_CMD_ISSUE,
1133 WAIT_MS_FLUSH, 0x1)) {
1134 debug("scsi_ahci: flush command timeout on port %d.\n", port);
1141 static int ahci_scsi_bus_reset(struct udevice *dev)
1143 /* Not implemented */
1148 #ifdef CONFIG_DM_SCSI
1149 int ahci_bind_scsi(struct udevice *ahci_dev, struct udevice **devp)
1151 struct udevice *dev;
1154 ret = device_bind_driver(ahci_dev, "ahci_scsi", "ahci_scsi", &dev);
1162 int ahci_probe_scsi(struct udevice *ahci_dev, ulong base)
1164 struct ahci_uc_priv *uc_priv;
1165 struct scsi_platdata *uc_plat;
1166 struct udevice *dev;
1169 device_find_first_child(ahci_dev, &dev);
1172 uc_plat = dev_get_uclass_platdata(dev);
1173 uc_plat->base = base;
1174 uc_plat->max_lun = 1;
1175 uc_plat->max_id = 2;
1177 uc_priv = dev_get_uclass_priv(ahci_dev);
1178 ret = ahci_init_one(uc_priv, dev);
1181 ret = ahci_start_ports(uc_priv);
1188 #ifdef CONFIG_DM_PCI
1189 int ahci_probe_scsi_pci(struct udevice *ahci_dev)
1193 base = (ulong)dm_pci_map_bar(ahci_dev, PCI_BASE_ADDRESS_5,
1196 return ahci_probe_scsi(ahci_dev, base);
1200 struct scsi_ops scsi_ops = {
1201 .exec = ahci_scsi_exec,
1202 .bus_reset = ahci_scsi_bus_reset,
1205 U_BOOT_DRIVER(ahci_scsi) = {
1206 .name = "ahci_scsi",
1211 int scsi_exec(struct udevice *dev, struct scsi_cmd *pccb)
1213 return ahci_scsi_exec(dev, pccb);
1216 __weak int scsi_bus_reset(struct udevice *dev)
1218 return ahci_scsi_bus_reset(dev);