1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) Freescale Semiconductor, Inc. 2006.
7 * with the reference on libata and ahci drvier in kernel
9 * This driver provides a SCSI interface to SATA.
15 #include <linux/bitops.h>
16 #include <linux/delay.h>
21 #include <asm/processor.h>
22 #include <linux/errno.h>
29 #include <linux/ctype.h>
31 #include <dm/device-internal.h>
34 static int ata_io_flush(struct ahci_uc_priv *uc_priv, u8 port);
36 #ifndef CONFIG_DM_SCSI
37 struct ahci_uc_priv *probe_ent = NULL;
40 #define writel_with_flush(a,b) do { writel(a,b); readl(b); } while (0)
43 * Some controllers limit number of blocks they can read/write at once.
44 * Contemporary SSD devices work much faster if the read/write size is aligned
45 * to a power of 2. Let's set default to 128 and allowing to be overwritten if
48 #ifndef MAX_SATA_BLOCKS_READ_WRITE
49 #define MAX_SATA_BLOCKS_READ_WRITE 0x80
52 /* Maximum timeouts for each event */
53 #define WAIT_MS_SPINUP 20000
54 #define WAIT_MS_DATAIO 10000
55 #define WAIT_MS_FLUSH 5000
56 #define WAIT_MS_LINKUP 200
58 #define AHCI_CAP_S64A BIT(31)
60 __weak void __iomem *ahci_port_base(void __iomem *base, u32 port)
62 return base + 0x100 + (port * 0x80);
65 #define msleep(a) udelay(a * 1000)
67 static void ahci_dcache_flush_range(unsigned long begin, unsigned long len)
69 const unsigned long start = begin;
70 const unsigned long end = start + len;
72 debug("%s: flush dcache: [%#lx, %#lx)\n", __func__, start, end);
73 flush_dcache_range(start, end);
77 * SATA controller DMAs to physical RAM. Ensure data from the
78 * controller is invalidated from dcache; next access comes from
81 static void ahci_dcache_invalidate_range(unsigned long begin, unsigned long len)
83 const unsigned long start = begin;
84 const unsigned long end = start + len;
86 debug("%s: invalidate dcache: [%#lx, %#lx)\n", __func__, start, end);
87 invalidate_dcache_range(start, end);
91 * Ensure data for SATA controller is flushed out of dcache and
92 * written to physical memory.
94 static void ahci_dcache_flush_sata_cmd(struct ahci_ioports *pp)
96 ahci_dcache_flush_range((unsigned long)pp->cmd_slot,
97 AHCI_PORT_PRIV_DMA_SZ);
100 static int waiting_for_cmd_completed(void __iomem *offset,
107 for (i = 0; ((status = readl(offset)) & sign) && i < timeout_msec; i++)
110 return (i < timeout_msec) ? 0 : -1;
113 int __weak ahci_link_up(struct ahci_uc_priv *uc_priv, int port)
117 void __iomem *port_mmio = uc_priv->port[port].port_mmio;
120 * Bring up SATA link.
121 * SATA link bringup time is usually less than 1 ms; only very
122 * rarely has it taken between 1-2 ms. Never seen it above 2 ms.
124 while (j < WAIT_MS_LINKUP) {
125 tmp = readl(port_mmio + PORT_SCR_STAT);
126 tmp &= PORT_SCR_STAT_DET_MASK;
127 if (tmp == PORT_SCR_STAT_DET_PHYRDY)
135 #ifdef CONFIG_SUNXI_AHCI
136 /* The sunxi AHCI controller requires this undocumented setup */
137 static void sunxi_dma_init(void __iomem *port_mmio)
139 clrsetbits_le32(port_mmio + PORT_P0DMACR, 0x0000ff00, 0x00004400);
143 int ahci_reset(void __iomem *base)
146 u32 __iomem *host_ctl_reg = base + HOST_CTL;
147 u32 tmp = readl(host_ctl_reg); /* global controller reset */
149 if ((tmp & HOST_RESET) == 0)
150 writel_with_flush(tmp | HOST_RESET, host_ctl_reg);
153 * reset must complete within 1 second, or
154 * the hardware should be considered fried.
158 tmp = readl(host_ctl_reg);
160 } while ((i > 0) && (tmp & HOST_RESET));
163 printf("controller reset failed (0x%x)\n", tmp);
170 static int ahci_host_init(struct ahci_uc_priv *uc_priv)
172 #if !defined(CONFIG_SCSI_AHCI_PLAT) && !defined(CONFIG_DM_SCSI)
173 struct udevice *dev = uc_priv->dev;
174 struct pci_child_plat *pplat = dev_get_parent_plat(dev);
177 void __iomem *mmio = uc_priv->mmio_base;
178 u32 tmp, cap_save, cmd;
180 void __iomem *port_mmio;
183 debug("ahci_host_init: start\n");
185 cap_save = readl(mmio + HOST_CAP);
186 cap_save &= ((1 << 28) | (1 << 17));
187 cap_save |= (1 << 27); /* Staggered Spin-up. Not needed. */
189 ret = ahci_reset(uc_priv->mmio_base);
193 writel_with_flush(HOST_AHCI_EN, mmio + HOST_CTL);
194 writel(cap_save, mmio + HOST_CAP);
195 writel_with_flush(0xf, mmio + HOST_PORTS_IMPL);
197 #if !defined(CONFIG_SCSI_AHCI_PLAT) && !defined(CONFIG_DM_SCSI)
198 if (pplat->vendor == PCI_VENDOR_ID_INTEL) {
201 dm_pci_read_config16(dev, 0x92, &tmp16);
202 dm_pci_write_config16(dev, 0x92, tmp16 | 0xf);
205 uc_priv->cap = readl(mmio + HOST_CAP);
206 uc_priv->port_map = readl(mmio + HOST_PORTS_IMPL);
207 port_map = uc_priv->port_map;
208 uc_priv->n_ports = (uc_priv->cap & 0x1f) + 1;
210 debug("cap 0x%x port_map 0x%x n_ports %d\n",
211 uc_priv->cap, uc_priv->port_map, uc_priv->n_ports);
213 #if !defined(CONFIG_DM_SCSI)
214 if (uc_priv->n_ports > CONFIG_SYS_SCSI_MAX_SCSI_ID)
215 uc_priv->n_ports = CONFIG_SYS_SCSI_MAX_SCSI_ID;
218 for (i = 0; i < uc_priv->n_ports; i++) {
219 if (!(port_map & (1 << i)))
221 uc_priv->port[i].port_mmio = ahci_port_base(mmio, i);
222 port_mmio = (u8 *)uc_priv->port[i].port_mmio;
224 /* make sure port is not active */
225 tmp = readl(port_mmio + PORT_CMD);
226 if (tmp & (PORT_CMD_LIST_ON | PORT_CMD_FIS_ON |
227 PORT_CMD_FIS_RX | PORT_CMD_START)) {
228 debug("Port %d is active. Deactivating.\n", i);
229 tmp &= ~(PORT_CMD_LIST_ON | PORT_CMD_FIS_ON |
230 PORT_CMD_FIS_RX | PORT_CMD_START);
231 writel_with_flush(tmp, port_mmio + PORT_CMD);
233 /* spec says 500 msecs for each bit, so
234 * this is slightly incorrect.
239 #ifdef CONFIG_SUNXI_AHCI
240 sunxi_dma_init(port_mmio);
243 /* Add the spinup command to whatever mode bits may
244 * already be on in the command register.
246 cmd = readl(port_mmio + PORT_CMD);
247 cmd |= PORT_CMD_SPIN_UP;
248 writel_with_flush(cmd, port_mmio + PORT_CMD);
250 /* Bring up SATA link. */
251 ret = ahci_link_up(uc_priv, i);
253 printf("SATA link %d timeout.\n", i);
256 debug("SATA link ok.\n");
259 /* Clear error status */
260 tmp = readl(port_mmio + PORT_SCR_ERR);
262 writel(tmp, port_mmio + PORT_SCR_ERR);
264 debug("Spinning up device on SATA port %d... ", i);
267 while (j < WAIT_MS_SPINUP) {
268 tmp = readl(port_mmio + PORT_TFDATA);
269 if (!(tmp & (ATA_BUSY | ATA_DRQ)))
272 tmp = readl(port_mmio + PORT_SCR_STAT);
273 tmp &= PORT_SCR_STAT_DET_MASK;
274 if (tmp == PORT_SCR_STAT_DET_PHYRDY)
279 tmp = readl(port_mmio + PORT_SCR_STAT) & PORT_SCR_STAT_DET_MASK;
280 if (tmp == PORT_SCR_STAT_DET_COMINIT) {
281 debug("SATA link %d down (COMINIT received), retrying...\n", i);
286 printf("Target spinup took %d ms.\n", j);
287 if (j == WAIT_MS_SPINUP)
292 tmp = readl(port_mmio + PORT_SCR_ERR);
293 debug("PORT_SCR_ERR 0x%x\n", tmp);
294 writel(tmp, port_mmio + PORT_SCR_ERR);
296 /* ack any pending irq events for this port */
297 tmp = readl(port_mmio + PORT_IRQ_STAT);
298 debug("PORT_IRQ_STAT 0x%x\n", tmp);
300 writel(tmp, port_mmio + PORT_IRQ_STAT);
302 writel(1 << i, mmio + HOST_IRQ_STAT);
304 /* register linkup ports */
305 tmp = readl(port_mmio + PORT_SCR_STAT);
306 debug("SATA port %d status: 0x%x\n", i, tmp);
307 if ((tmp & PORT_SCR_STAT_DET_MASK) == PORT_SCR_STAT_DET_PHYRDY)
308 uc_priv->link_port_map |= (0x01 << i);
311 tmp = readl(mmio + HOST_CTL);
312 debug("HOST_CTL 0x%x\n", tmp);
313 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
314 tmp = readl(mmio + HOST_CTL);
315 debug("HOST_CTL 0x%x\n", tmp);
316 #if !defined(CONFIG_DM_SCSI)
317 #ifndef CONFIG_SCSI_AHCI_PLAT
318 dm_pci_read_config16(dev, PCI_COMMAND, &tmp16);
319 tmp |= PCI_COMMAND_MASTER;
320 dm_pci_write_config16(dev, PCI_COMMAND, tmp16);
327 static void ahci_print_info(struct ahci_uc_priv *uc_priv)
329 #if !defined(CONFIG_SCSI_AHCI_PLAT) && !defined(CONFIG_DM_SCSI)
330 struct udevice *dev = uc_priv->dev;
333 void __iomem *mmio = uc_priv->mmio_base;
334 u32 vers, cap, cap2, impl, speed;
338 vers = readl(mmio + HOST_VERSION);
340 cap2 = readl(mmio + HOST_CAP2);
341 impl = uc_priv->port_map;
343 speed = (cap >> 20) & 0xf;
353 #if defined(CONFIG_SCSI_AHCI_PLAT) || defined(CONFIG_DM_SCSI)
356 dm_pci_read_config16(dev, 0x0a, &cc);
359 else if (cc == 0x0106)
361 else if (cc == 0x0104)
366 printf("AHCI %02x%02x.%02x%02x "
367 "%u slots %u ports %s Gbps 0x%x impl %s mode\n",
372 ((cap >> 8) & 0x1f) + 1, (cap & 0x1f) + 1, speed_s, impl, scc_s);
378 cap & (1 << 31) ? "64bit " : "",
379 cap & (1 << 30) ? "ncq " : "",
380 cap & (1 << 28) ? "ilck " : "",
381 cap & (1 << 27) ? "stag " : "",
382 cap & (1 << 26) ? "pm " : "",
383 cap & (1 << 25) ? "led " : "",
384 cap & (1 << 24) ? "clo " : "",
385 cap & (1 << 19) ? "nz " : "",
386 cap & (1 << 18) ? "only " : "",
387 cap & (1 << 17) ? "pmp " : "",
388 cap & (1 << 16) ? "fbss " : "",
389 cap & (1 << 15) ? "pio " : "",
390 cap & (1 << 14) ? "slum " : "",
391 cap & (1 << 13) ? "part " : "",
392 cap & (1 << 7) ? "ccc " : "",
393 cap & (1 << 6) ? "ems " : "",
394 cap & (1 << 5) ? "sxs " : "",
395 cap2 & (1 << 2) ? "apst " : "",
396 cap2 & (1 << 1) ? "nvmp " : "",
397 cap2 & (1 << 0) ? "boh " : "");
400 #if defined(CONFIG_DM_SCSI) || !defined(CONFIG_SCSI_AHCI_PLAT)
401 static int ahci_init_one(struct ahci_uc_priv *uc_priv, struct udevice *dev)
403 #if !defined(CONFIG_DM_SCSI)
410 uc_priv->host_flags = ATA_FLAG_SATA
415 uc_priv->pio_mask = 0x1f;
416 uc_priv->udma_mask = 0x7f; /*Fixme,assume to support UDMA6 */
418 #if !defined(CONFIG_DM_SCSI)
419 uc_priv->mmio_base = dm_pci_map_bar(dev, PCI_BASE_ADDRESS_5,
423 * JMicron-specific fixup:
424 * make sure we're in AHCI mode
426 dm_pci_read_config16(dev, PCI_VENDOR_ID, &vendor);
427 if (vendor == 0x197b)
428 dm_pci_write_config8(dev, 0x41, 0xa1);
430 struct scsi_plat *plat = dev_get_uclass_plat(dev);
431 uc_priv->mmio_base = (void *)plat->base;
434 debug("ahci mmio_base=0x%p\n", uc_priv->mmio_base);
435 /* initialize adapter */
436 rc = ahci_host_init(uc_priv);
440 ahci_print_info(uc_priv);
449 #define MAX_DATA_BYTE_COUNT (4*1024*1024)
451 static int ahci_fill_sg(struct ahci_uc_priv *uc_priv, u8 port,
452 unsigned char *buf, int buf_len)
454 struct ahci_ioports *pp = &(uc_priv->port[port]);
455 struct ahci_sg *ahci_sg = pp->cmd_tbl_sg;
456 phys_addr_t pa = virt_to_phys(buf);
460 sg_count = ((buf_len - 1) / MAX_DATA_BYTE_COUNT) + 1;
461 if (sg_count > AHCI_MAX_SG) {
462 printf("Error:Too much sg!\n");
466 for (i = 0; i < sg_count; i++) {
467 ahci_sg->addr = cpu_to_le32(lower_32_bits(pa));
468 ahci_sg->addr_hi = cpu_to_le32(upper_32_bits(pa));
469 if (ahci_sg->addr_hi && !(uc_priv->cap & AHCI_CAP_S64A)) {
470 printf("Error: DMA address too high\n");
473 ahci_sg->flags_size = cpu_to_le32(0x3fffff &
474 (buf_len < MAX_DATA_BYTE_COUNT ?
476 (MAX_DATA_BYTE_COUNT - 1)));
478 buf_len -= MAX_DATA_BYTE_COUNT;
479 pa += MAX_DATA_BYTE_COUNT;
485 static void ahci_fill_cmd_slot(struct ahci_ioports *pp, u32 opts)
487 phys_addr_t pa = virt_to_phys((void *)pp->cmd_tbl);
489 pp->cmd_slot->opts = cpu_to_le32(opts);
490 pp->cmd_slot->status = 0;
491 pp->cmd_slot->tbl_addr = cpu_to_le32(lower_32_bits(pa));
492 #ifdef CONFIG_PHYS_64BIT
493 pp->cmd_slot->tbl_addr_hi = cpu_to_le32(upper_32_bits(pa));
497 static int wait_spinup(void __iomem *port_mmio)
502 start = get_timer(0);
504 tf_data = readl(port_mmio + PORT_TFDATA);
505 if (!(tf_data & ATA_BUSY))
507 } while (get_timer(start) < WAIT_MS_SPINUP);
512 static int ahci_port_start(struct ahci_uc_priv *uc_priv, u8 port)
514 struct ahci_ioports *pp = &(uc_priv->port[port]);
515 void __iomem *port_mmio = pp->port_mmio;
520 debug("Enter start port: %d\n", port);
521 port_status = readl(port_mmio + PORT_SCR_STAT);
522 debug("Port %d status: %x\n", port, port_status);
523 if ((port_status & 0xf) != 0x03) {
524 printf("No Link on this port!\n");
528 mem = memalign(2048, AHCI_PORT_PRIV_DMA_SZ);
531 printf("%s: No mem for table!\n", __func__);
534 memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ);
537 * First item in chunk of DMA memory: 32-slot command table,
538 * 32 bytes each in size
541 (struct ahci_cmd_hdr *)(uintptr_t)virt_to_phys((void *)mem);
542 debug("cmd_slot = %p\n", pp->cmd_slot);
543 mem += (AHCI_CMD_SLOT_SZ + 224);
546 * Second item: Received-FIS area
548 pp->rx_fis = virt_to_phys((void *)mem);
549 mem += AHCI_RX_FIS_SZ;
552 * Third item: data area for storing a single command
553 * and its scatter-gather table
555 pp->cmd_tbl = virt_to_phys((void *)mem);
556 debug("cmd_tbl_dma = %lx\n", pp->cmd_tbl);
558 mem += AHCI_CMD_TBL_HDR;
560 (struct ahci_sg *)(uintptr_t)virt_to_phys((void *)mem);
562 dma_addr = (ulong)pp->cmd_slot;
563 writel_with_flush(dma_addr, port_mmio + PORT_LST_ADDR);
564 writel_with_flush(dma_addr >> 32, port_mmio + PORT_LST_ADDR_HI);
565 dma_addr = (ulong)pp->rx_fis;
566 writel_with_flush(dma_addr, port_mmio + PORT_FIS_ADDR);
567 writel_with_flush(dma_addr >> 32, port_mmio + PORT_FIS_ADDR_HI);
569 #ifdef CONFIG_SUNXI_AHCI
570 sunxi_dma_init(port_mmio);
573 writel_with_flush(PORT_CMD_ICC_ACTIVE | PORT_CMD_FIS_RX |
574 PORT_CMD_POWER_ON | PORT_CMD_SPIN_UP |
575 PORT_CMD_START, port_mmio + PORT_CMD);
577 debug("Exit start port %d\n", port);
580 * Make sure interface is not busy based on error and status
581 * information from task file data register before proceeding
583 return wait_spinup(port_mmio);
587 static int ahci_device_data_io(struct ahci_uc_priv *uc_priv, u8 port, u8 *fis,
588 int fis_len, u8 *buf, int buf_len, u8 is_write)
591 struct ahci_ioports *pp = &(uc_priv->port[port]);
592 void __iomem *port_mmio = pp->port_mmio;
597 debug("Enter %s: for port %d\n", __func__, port);
599 if (port > uc_priv->n_ports) {
600 printf("Invalid port number %d\n", port);
604 port_status = readl(port_mmio + PORT_SCR_STAT);
605 if ((port_status & 0xf) != 0x03) {
606 debug("No Link on port %d!\n", port);
610 memcpy((unsigned char *)pp->cmd_tbl, fis, fis_len);
612 sg_count = ahci_fill_sg(uc_priv, port, buf, buf_len);
613 opts = (fis_len >> 2) | (sg_count << 16) | (is_write << 6);
614 ahci_fill_cmd_slot(pp, opts);
616 ahci_dcache_flush_sata_cmd(pp);
617 ahci_dcache_flush_range((unsigned long)buf, (unsigned long)buf_len);
619 writel_with_flush(1, port_mmio + PORT_CMD_ISSUE);
621 if (waiting_for_cmd_completed(port_mmio + PORT_CMD_ISSUE,
622 WAIT_MS_DATAIO, 0x1)) {
623 printf("timeout exit!\n");
627 ahci_dcache_invalidate_range((unsigned long)buf,
628 (unsigned long)buf_len);
629 debug("%s: %d byte transferred.\n", __func__,
630 le32_to_cpu(pp->cmd_slot->status));
635 static char *ata_id_strcpy(u16 *target, u16 *src, int len)
638 for (i = 0; i < len / 2; i++)
639 target[i] = swab16(src[i]);
640 return (char *)target;
644 * SCSI INQUIRY command operation.
646 static int ata_scsiop_inquiry(struct ahci_uc_priv *uc_priv,
647 struct scsi_cmd *pccb)
649 static const u8 hdr[] = {
652 0x5, /* claim SPC-3 version compatibility */
658 ALLOC_CACHE_ALIGN_BUFFER(u16, tmpid, ATA_ID_WORDS);
661 /* Clean ccb data buffer */
662 memset(pccb->pdata, 0, pccb->datalen);
664 memcpy(pccb->pdata, hdr, sizeof(hdr));
666 if (pccb->datalen <= 35)
669 memset(fis, 0, sizeof(fis));
670 /* Construct the FIS */
671 fis[0] = 0x27; /* Host to device FIS. */
672 fis[1] = 1 << 7; /* Command FIS. */
673 fis[2] = ATA_CMD_ID_ATA; /* Command byte. */
675 /* Read id from sata */
678 if (ahci_device_data_io(uc_priv, port, (u8 *)&fis, sizeof(fis),
679 (u8 *)tmpid, ATA_ID_WORDS * 2, 0)) {
680 debug("scsi_ahci: SCSI inquiry command failure.\n");
684 if (!uc_priv->ataid[port]) {
685 uc_priv->ataid[port] = malloc(ATA_ID_WORDS * 2);
686 if (!uc_priv->ataid[port]) {
687 printf("%s: No memory for ataid[port]\n", __func__);
692 idbuf = uc_priv->ataid[port];
694 memcpy(idbuf, tmpid, ATA_ID_WORDS * 2);
695 ata_swap_buf_le16(idbuf, ATA_ID_WORDS);
697 memcpy(&pccb->pdata[8], "ATA ", 8);
698 ata_id_strcpy((u16 *)&pccb->pdata[16], &idbuf[ATA_ID_PROD], 16);
699 ata_id_strcpy((u16 *)&pccb->pdata[32], &idbuf[ATA_ID_FW_REV], 4);
709 * SCSI READ10/WRITE10 command operation.
711 static int ata_scsiop_read_write(struct ahci_uc_priv *uc_priv,
712 struct scsi_cmd *pccb, u8 is_write)
717 u8 *user_buffer = pccb->pdata;
718 u32 user_buffer_size = pccb->datalen;
720 /* Retrieve the base LBA number from the ccb structure. */
721 if (pccb->cmd[0] == SCSI_READ16) {
722 memcpy(&lba, pccb->cmd + 2, 8);
723 lba = be64_to_cpu(lba);
726 memcpy(&temp, pccb->cmd + 2, 4);
727 lba = be32_to_cpu(temp);
731 * Retrieve the base LBA number and the block count from
734 * For 10-byte and 16-byte SCSI R/W commands, transfer
735 * length 0 means transfer 0 block of data.
736 * However, for ATA R/W commands, sector count 0 means
737 * 256 or 65536 sectors, not 0 sectors as in SCSI.
739 * WARNING: one or two older ATA drives treat 0 as 0...
741 if (pccb->cmd[0] == SCSI_READ16)
742 blocks = (((u16)pccb->cmd[13]) << 8) | ((u16) pccb->cmd[14]);
744 blocks = (((u16)pccb->cmd[7]) << 8) | ((u16) pccb->cmd[8]);
746 debug("scsi_ahci: %s %u blocks starting from lba 0x" LBAFU "\n",
747 is_write ? "write" : "read", blocks, lba);
750 memset(fis, 0, sizeof(fis));
751 fis[0] = 0x27; /* Host to device FIS. */
752 fis[1] = 1 << 7; /* Command FIS. */
753 /* Command byte (read/write). */
754 fis[2] = is_write ? ATA_CMD_WRITE_EXT : ATA_CMD_READ_EXT;
757 u16 now_blocks; /* number of blocks per iteration */
758 u32 transfer_size; /* number of bytes per iteration */
760 now_blocks = min((u16)MAX_SATA_BLOCKS_READ_WRITE, blocks);
762 transfer_size = ATA_SECT_SIZE * now_blocks;
763 if (transfer_size > user_buffer_size) {
764 printf("scsi_ahci: Error: buffer too small.\n");
769 * LBA48 SATA command but only use 32bit address range within
770 * that (unless we've enabled 64bit LBA support). The next
771 * smaller command range (28bit) is too small.
773 fis[4] = (lba >> 0) & 0xff;
774 fis[5] = (lba >> 8) & 0xff;
775 fis[6] = (lba >> 16) & 0xff;
776 fis[7] = 1 << 6; /* device reg: set LBA mode */
777 fis[8] = ((lba >> 24) & 0xff);
778 #ifdef CONFIG_SYS_64BIT_LBA
779 if (pccb->cmd[0] == SCSI_READ16) {
780 fis[9] = ((lba >> 32) & 0xff);
781 fis[10] = ((lba >> 40) & 0xff);
785 fis[3] = 0xe0; /* features */
787 /* Block (sector) count */
788 fis[12] = (now_blocks >> 0) & 0xff;
789 fis[13] = (now_blocks >> 8) & 0xff;
791 /* Read/Write from ahci */
792 if (ahci_device_data_io(uc_priv, pccb->target, (u8 *)&fis,
793 sizeof(fis), user_buffer, transfer_size,
795 debug("scsi_ahci: SCSI %s10 command failure.\n",
796 is_write ? "WRITE" : "READ");
800 /* If this transaction is a write, do a following flush.
801 * Writes in u-boot are so rare, and the logic to know when is
802 * the last write and do a flush only there is sufficiently
803 * difficult. Just do a flush after every write. This incurs,
804 * usually, one extra flush when the rare writes do happen.
807 if (-EIO == ata_io_flush(uc_priv, pccb->target))
810 user_buffer += transfer_size;
811 user_buffer_size -= transfer_size;
812 blocks -= now_blocks;
821 * SCSI READ CAPACITY10 command operation.
823 static int ata_scsiop_read_capacity10(struct ahci_uc_priv *uc_priv,
824 struct scsi_cmd *pccb)
830 if (!uc_priv->ataid[pccb->target]) {
831 printf("scsi_ahci: SCSI READ CAPACITY10 command failure. "
833 "\tPlease run SCSI command INQUIRY first!\n");
837 cap64 = ata_id_n_sectors(uc_priv->ataid[pccb->target]);
838 if (cap64 > 0x100000000ULL)
841 cap = cpu_to_be32(cap64);
842 memcpy(pccb->pdata, &cap, sizeof(cap));
844 block_size = cpu_to_be32((u32)512);
845 memcpy(&pccb->pdata[4], &block_size, 4);
852 * SCSI READ CAPACITY16 command operation.
854 static int ata_scsiop_read_capacity16(struct ahci_uc_priv *uc_priv,
855 struct scsi_cmd *pccb)
860 if (!uc_priv->ataid[pccb->target]) {
861 printf("scsi_ahci: SCSI READ CAPACITY16 command failure. "
863 "\tPlease run SCSI command INQUIRY first!\n");
867 cap = ata_id_n_sectors(uc_priv->ataid[pccb->target]);
868 cap = cpu_to_be64(cap);
869 memcpy(pccb->pdata, &cap, sizeof(cap));
871 block_size = cpu_to_be64((u64)512);
872 memcpy(&pccb->pdata[8], &block_size, 8);
879 * SCSI TEST UNIT READY command operation.
881 static int ata_scsiop_test_unit_ready(struct ahci_uc_priv *uc_priv,
882 struct scsi_cmd *pccb)
884 return (uc_priv->ataid[pccb->target]) ? 0 : -EPERM;
888 static int ahci_scsi_exec(struct udevice *dev, struct scsi_cmd *pccb)
890 struct ahci_uc_priv *uc_priv;
891 #ifdef CONFIG_DM_SCSI
892 uc_priv = dev_get_uclass_priv(dev->parent);
898 switch (pccb->cmd[0]) {
901 ret = ata_scsiop_read_write(uc_priv, pccb, 0);
904 ret = ata_scsiop_read_write(uc_priv, pccb, 1);
906 case SCSI_RD_CAPAC10:
907 ret = ata_scsiop_read_capacity10(uc_priv, pccb);
909 case SCSI_RD_CAPAC16:
910 ret = ata_scsiop_read_capacity16(uc_priv, pccb);
913 ret = ata_scsiop_test_unit_ready(uc_priv, pccb);
916 ret = ata_scsiop_inquiry(uc_priv, pccb);
919 printf("Unsupport SCSI command 0x%02x\n", pccb->cmd[0]);
924 debug("SCSI command 0x%02x ret errno %d\n", pccb->cmd[0], ret);
931 static int ahci_start_ports(struct ahci_uc_priv *uc_priv)
936 linkmap = uc_priv->link_port_map;
938 for (i = 0; i < uc_priv->n_ports; i++) {
939 if (((linkmap >> i) & 0x01)) {
940 if (ahci_port_start(uc_priv, (u8) i)) {
941 printf("Can not start port %d\n", i);
950 #ifndef CONFIG_DM_SCSI
951 void scsi_low_level_init(int busdevfunc)
953 struct ahci_uc_priv *uc_priv;
955 #ifndef CONFIG_SCSI_AHCI_PLAT
956 probe_ent = calloc(1, sizeof(struct ahci_uc_priv));
958 printf("%s: No memory for uc_priv\n", __func__);
965 ret = dm_pci_bus_find_bdf(busdevfunc, &dev);
968 ahci_init_one(uc_priv, dev);
973 ahci_start_ports(uc_priv);
977 #ifndef CONFIG_SCSI_AHCI_PLAT
978 int ahci_init_one_dm(struct udevice *dev)
980 struct ahci_uc_priv *uc_priv = dev_get_uclass_priv(dev);
982 return ahci_init_one(uc_priv, dev);
986 int ahci_start_ports_dm(struct udevice *dev)
988 struct ahci_uc_priv *uc_priv = dev_get_uclass_priv(dev);
990 return ahci_start_ports(uc_priv);
993 #ifdef CONFIG_SCSI_AHCI_PLAT
994 static int ahci_init_common(struct ahci_uc_priv *uc_priv, void __iomem *base)
998 uc_priv->host_flags = ATA_FLAG_SATA
1002 | ATA_FLAG_NO_ATAPI;
1003 uc_priv->pio_mask = 0x1f;
1004 uc_priv->udma_mask = 0x7f; /*Fixme,assume to support UDMA6 */
1006 uc_priv->mmio_base = base;
1008 /* initialize adapter */
1009 rc = ahci_host_init(uc_priv);
1013 ahci_print_info(uc_priv);
1015 rc = ahci_start_ports(uc_priv);
1021 #ifndef CONFIG_DM_SCSI
1022 int ahci_init(void __iomem *base)
1024 struct ahci_uc_priv *uc_priv;
1026 probe_ent = malloc(sizeof(struct ahci_uc_priv));
1028 printf("%s: No memory for uc_priv\n", __func__);
1032 uc_priv = probe_ent;
1033 memset(uc_priv, 0, sizeof(struct ahci_uc_priv));
1035 return ahci_init_common(uc_priv, base);
1039 int ahci_init_dm(struct udevice *dev, void __iomem *base)
1041 struct ahci_uc_priv *uc_priv = dev_get_uclass_priv(dev);
1043 return ahci_init_common(uc_priv, base);
1046 void __weak scsi_init(void)
1050 #endif /* CONFIG_SCSI_AHCI_PLAT */
1053 * In the general case of generic rotating media it makes sense to have a
1054 * flush capability. It probably even makes sense in the case of SSDs because
1055 * one cannot always know for sure what kind of internal cache/flush mechanism
1056 * is embodied therein. At first it was planned to invoke this after the last
1057 * write to disk and before rebooting. In practice, knowing, a priori, which
1058 * is the last write is difficult. Because writing to the disk in u-boot is
1059 * very rare, this flush command will be invoked after every block write.
1061 static int ata_io_flush(struct ahci_uc_priv *uc_priv, u8 port)
1064 struct ahci_ioports *pp = &(uc_priv->port[port]);
1065 void __iomem *port_mmio = pp->port_mmio;
1066 u32 cmd_fis_len = 5; /* five dwords */
1068 /* Preset the FIS */
1070 fis[0] = 0x27; /* Host to device FIS. */
1071 fis[1] = 1 << 7; /* Command FIS. */
1072 fis[2] = ATA_CMD_FLUSH_EXT;
1074 memcpy((unsigned char *)pp->cmd_tbl, fis, 20);
1075 ahci_fill_cmd_slot(pp, cmd_fis_len);
1076 ahci_dcache_flush_sata_cmd(pp);
1077 writel_with_flush(1, port_mmio + PORT_CMD_ISSUE);
1079 if (waiting_for_cmd_completed(port_mmio + PORT_CMD_ISSUE,
1080 WAIT_MS_FLUSH, 0x1)) {
1081 debug("scsi_ahci: flush command timeout on port %d.\n", port);
1088 static int ahci_scsi_bus_reset(struct udevice *dev)
1090 /* Not implemented */
1095 #ifdef CONFIG_DM_SCSI
1096 int ahci_bind_scsi(struct udevice *ahci_dev, struct udevice **devp)
1098 struct udevice *dev;
1101 ret = device_bind_driver(ahci_dev, "ahci_scsi", "ahci_scsi", &dev);
1109 int ahci_probe_scsi(struct udevice *ahci_dev, ulong base)
1111 struct ahci_uc_priv *uc_priv;
1112 struct scsi_plat *uc_plat;
1113 struct udevice *dev;
1116 device_find_first_child(ahci_dev, &dev);
1119 uc_plat = dev_get_uclass_plat(dev);
1120 uc_plat->base = base;
1121 uc_plat->max_lun = 1;
1122 uc_plat->max_id = 2;
1124 uc_priv = dev_get_uclass_priv(ahci_dev);
1125 ret = ahci_init_one(uc_priv, dev);
1128 ret = ahci_start_ports(uc_priv);
1133 * scsi_scan_dev() scans devices up-to the number of max_id.
1134 * Update max_id if the number of detected ports exceeds max_id.
1135 * This allows SCSI to scan all detected ports.
1137 uc_plat->max_id = max_t(unsigned long, uc_priv->n_ports,
1139 /* If port count is less than max_id, update max_id */
1140 if (uc_priv->n_ports < uc_plat->max_id)
1141 uc_plat->max_id = uc_priv->n_ports;
1146 int ahci_probe_scsi_pci(struct udevice *ahci_dev)
1151 base = (ulong)dm_pci_map_bar(ahci_dev, PCI_BASE_ADDRESS_5,
1156 * Right now, we have only one quirk here, which is not enough to
1157 * introduce a new Kconfig option to select this. Once we have more
1158 * quirks in this AHCI code, we should add a Kconfig option for
1161 dm_pci_read_config16(ahci_dev, PCI_VENDOR_ID, &vendor);
1162 dm_pci_read_config16(ahci_dev, PCI_DEVICE_ID, &device);
1164 if (vendor == PCI_VENDOR_ID_CAVIUM &&
1165 device == PCI_DEVICE_ID_CAVIUM_SATA)
1166 base = (uintptr_t)dm_pci_map_bar(ahci_dev, PCI_BASE_ADDRESS_0,
1168 return ahci_probe_scsi(ahci_dev, base);
1171 struct scsi_ops scsi_ops = {
1172 .exec = ahci_scsi_exec,
1173 .bus_reset = ahci_scsi_bus_reset,
1176 U_BOOT_DRIVER(ahci_scsi) = {
1177 .name = "ahci_scsi",
1182 int scsi_exec(struct udevice *dev, struct scsi_cmd *pccb)
1184 return ahci_scsi_exec(dev, pccb);
1187 __weak int scsi_bus_reset(struct udevice *dev)
1189 return ahci_scsi_bus_reset(dev);