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
15 #include <asm/processor.h>
16 #include <linux/errno.h>
22 #include <linux/ctype.h>
25 static int ata_io_flush(u8 port);
27 struct ahci_uc_priv *probe_ent = NULL;
29 #define writel_with_flush(a,b) do { writel(a,b); readl(b); } while (0)
32 * Some controllers limit number of blocks they can read/write at once.
33 * Contemporary SSD devices work much faster if the read/write size is aligned
34 * to a power of 2. Let's set default to 128 and allowing to be overwritten if
37 #ifndef MAX_SATA_BLOCKS_READ_WRITE
38 #define MAX_SATA_BLOCKS_READ_WRITE 0x80
41 /* Maximum timeouts for each event */
42 #define WAIT_MS_SPINUP 20000
43 #define WAIT_MS_DATAIO 10000
44 #define WAIT_MS_FLUSH 5000
45 #define WAIT_MS_LINKUP 200
47 __weak void __iomem *ahci_port_base(void __iomem *base, u32 port)
49 return base + 0x100 + (port * 0x80);
53 static void ahci_setup_port(struct ahci_ioports *port, void __iomem *base,
54 unsigned int port_idx)
56 base = ahci_port_base(base, port_idx);
58 port->cmd_addr = base;
59 port->scr_addr = base + PORT_SCR;
63 #define msleep(a) udelay(a * 1000)
65 static void ahci_dcache_flush_range(unsigned long begin, unsigned long len)
67 const unsigned long start = begin;
68 const unsigned long end = start + len;
70 debug("%s: flush dcache: [%#lx, %#lx)\n", __func__, start, end);
71 flush_dcache_range(start, end);
75 * SATA controller DMAs to physical RAM. Ensure data from the
76 * controller is invalidated from dcache; next access comes from
79 static void ahci_dcache_invalidate_range(unsigned long begin, unsigned long len)
81 const unsigned long start = begin;
82 const unsigned long end = start + len;
84 debug("%s: invalidate dcache: [%#lx, %#lx)\n", __func__, start, end);
85 invalidate_dcache_range(start, end);
89 * Ensure data for SATA controller is flushed out of dcache and
90 * written to physical memory.
92 static void ahci_dcache_flush_sata_cmd(struct ahci_ioports *pp)
94 ahci_dcache_flush_range((unsigned long)pp->cmd_slot,
95 AHCI_PORT_PRIV_DMA_SZ);
98 static int waiting_for_cmd_completed(void __iomem *offset,
105 for (i = 0; ((status = readl(offset)) & sign) && i < timeout_msec; i++)
108 return (i < timeout_msec) ? 0 : -1;
111 int __weak ahci_link_up(struct ahci_uc_priv *uc_priv, u8 port)
115 void __iomem *port_mmio = uc_priv->port[port].port_mmio;
118 * Bring up SATA link.
119 * SATA link bringup time is usually less than 1 ms; only very
120 * rarely has it taken between 1-2 ms. Never seen it above 2 ms.
122 while (j < WAIT_MS_LINKUP) {
123 tmp = readl(port_mmio + PORT_SCR_STAT);
124 tmp &= PORT_SCR_STAT_DET_MASK;
125 if (tmp == PORT_SCR_STAT_DET_PHYRDY)
133 #ifdef CONFIG_SUNXI_AHCI
134 /* The sunxi AHCI controller requires this undocumented setup */
135 static void sunxi_dma_init(void __iomem *port_mmio)
137 clrsetbits_le32(port_mmio + PORT_P0DMACR, 0x0000ff00, 0x00004400);
141 int ahci_reset(void __iomem *base)
144 u32 __iomem *host_ctl_reg = base + HOST_CTL;
145 u32 tmp = readl(host_ctl_reg); /* global controller reset */
147 if ((tmp & HOST_RESET) == 0)
148 writel_with_flush(tmp | HOST_RESET, host_ctl_reg);
151 * reset must complete within 1 second, or
152 * the hardware should be considered fried.
156 tmp = readl(host_ctl_reg);
158 } while ((i > 0) && (tmp & HOST_RESET));
161 printf("controller reset failed (0x%x)\n", tmp);
168 static int ahci_host_init(struct ahci_uc_priv *probe_ent)
170 #if !defined(CONFIG_SCSI_AHCI_PLAT) && !defined(CONFIG_DM_SCSI)
171 # ifdef CONFIG_DM_PCI
172 struct udevice *dev = probe_ent->dev;
173 struct pci_child_platdata *pplat = dev_get_parent_platdata(dev);
175 pci_dev_t pdev = probe_ent->dev;
176 unsigned short vendor;
180 void __iomem *mmio = probe_ent->mmio_base;
181 u32 tmp, cap_save, cmd;
183 void __iomem *port_mmio;
186 debug("ahci_host_init: start\n");
188 cap_save = readl(mmio + HOST_CAP);
189 cap_save &= ((1 << 28) | (1 << 17));
190 cap_save |= (1 << 27); /* Staggered Spin-up. Not needed. */
192 ret = ahci_reset(probe_ent->mmio_base);
196 writel_with_flush(HOST_AHCI_EN, mmio + HOST_CTL);
197 writel(cap_save, mmio + HOST_CAP);
198 writel_with_flush(0xf, mmio + HOST_PORTS_IMPL);
200 #if !defined(CONFIG_SCSI_AHCI_PLAT) && !defined(CONFIG_DM_SCSI)
201 # ifdef CONFIG_DM_PCI
202 if (pplat->vendor == PCI_VENDOR_ID_INTEL) {
205 dm_pci_read_config16(dev, 0x92, &tmp16);
206 dm_pci_write_config16(dev, 0x92, tmp16 | 0xf);
209 pci_read_config_word(pdev, PCI_VENDOR_ID, &vendor);
211 if (vendor == PCI_VENDOR_ID_INTEL) {
213 pci_read_config_word(pdev, 0x92, &tmp16);
215 pci_write_config_word(pdev, 0x92, tmp16);
219 probe_ent->cap = readl(mmio + HOST_CAP);
220 probe_ent->port_map = readl(mmio + HOST_PORTS_IMPL);
221 port_map = probe_ent->port_map;
222 probe_ent->n_ports = (probe_ent->cap & 0x1f) + 1;
224 debug("cap 0x%x port_map 0x%x n_ports %d\n",
225 probe_ent->cap, probe_ent->port_map, probe_ent->n_ports);
227 if (probe_ent->n_ports > CONFIG_SYS_SCSI_MAX_SCSI_ID)
228 probe_ent->n_ports = CONFIG_SYS_SCSI_MAX_SCSI_ID;
230 for (i = 0; i < probe_ent->n_ports; i++) {
231 if (!(port_map & (1 << i)))
233 probe_ent->port[i].port_mmio = ahci_port_base(mmio, i);
234 port_mmio = (u8 *) probe_ent->port[i].port_mmio;
235 ahci_setup_port(&probe_ent->port[i], mmio, i);
237 /* make sure port is not active */
238 tmp = readl(port_mmio + PORT_CMD);
239 if (tmp & (PORT_CMD_LIST_ON | PORT_CMD_FIS_ON |
240 PORT_CMD_FIS_RX | PORT_CMD_START)) {
241 debug("Port %d is active. Deactivating.\n", i);
242 tmp &= ~(PORT_CMD_LIST_ON | PORT_CMD_FIS_ON |
243 PORT_CMD_FIS_RX | PORT_CMD_START);
244 writel_with_flush(tmp, port_mmio + PORT_CMD);
246 /* spec says 500 msecs for each bit, so
247 * this is slightly incorrect.
252 #ifdef CONFIG_SUNXI_AHCI
253 sunxi_dma_init(port_mmio);
256 /* Add the spinup command to whatever mode bits may
257 * already be on in the command register.
259 cmd = readl(port_mmio + PORT_CMD);
260 cmd |= PORT_CMD_SPIN_UP;
261 writel_with_flush(cmd, port_mmio + PORT_CMD);
263 /* Bring up SATA link. */
264 ret = ahci_link_up(probe_ent, i);
266 printf("SATA link %d timeout.\n", i);
269 debug("SATA link ok.\n");
272 /* Clear error status */
273 tmp = readl(port_mmio + PORT_SCR_ERR);
275 writel(tmp, port_mmio + PORT_SCR_ERR);
277 debug("Spinning up device on SATA port %d... ", i);
280 while (j < WAIT_MS_SPINUP) {
281 tmp = readl(port_mmio + PORT_TFDATA);
282 if (!(tmp & (ATA_BUSY | ATA_DRQ)))
285 tmp = readl(port_mmio + PORT_SCR_STAT);
286 tmp &= PORT_SCR_STAT_DET_MASK;
287 if (tmp == PORT_SCR_STAT_DET_PHYRDY)
292 tmp = readl(port_mmio + PORT_SCR_STAT) & PORT_SCR_STAT_DET_MASK;
293 if (tmp == PORT_SCR_STAT_DET_COMINIT) {
294 debug("SATA link %d down (COMINIT received), retrying...\n", i);
299 printf("Target spinup took %d ms.\n", j);
300 if (j == WAIT_MS_SPINUP)
305 tmp = readl(port_mmio + PORT_SCR_ERR);
306 debug("PORT_SCR_ERR 0x%x\n", tmp);
307 writel(tmp, port_mmio + PORT_SCR_ERR);
309 /* ack any pending irq events for this port */
310 tmp = readl(port_mmio + PORT_IRQ_STAT);
311 debug("PORT_IRQ_STAT 0x%x\n", tmp);
313 writel(tmp, port_mmio + PORT_IRQ_STAT);
315 writel(1 << i, mmio + HOST_IRQ_STAT);
317 /* register linkup ports */
318 tmp = readl(port_mmio + PORT_SCR_STAT);
319 debug("SATA port %d status: 0x%x\n", i, tmp);
320 if ((tmp & PORT_SCR_STAT_DET_MASK) == PORT_SCR_STAT_DET_PHYRDY)
321 probe_ent->link_port_map |= (0x01 << i);
324 tmp = readl(mmio + HOST_CTL);
325 debug("HOST_CTL 0x%x\n", tmp);
326 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
327 tmp = readl(mmio + HOST_CTL);
328 debug("HOST_CTL 0x%x\n", tmp);
329 #if !defined(CONFIG_DM_SCSI)
330 #ifndef CONFIG_SCSI_AHCI_PLAT
331 # ifdef CONFIG_DM_PCI
332 dm_pci_read_config16(dev, PCI_COMMAND, &tmp16);
333 tmp |= PCI_COMMAND_MASTER;
334 dm_pci_write_config16(dev, PCI_COMMAND, tmp16);
336 pci_read_config_word(pdev, PCI_COMMAND, &tmp16);
337 tmp |= PCI_COMMAND_MASTER;
338 pci_write_config_word(pdev, PCI_COMMAND, tmp16);
346 static void ahci_print_info(struct ahci_uc_priv *probe_ent)
348 #if !defined(CONFIG_SCSI_AHCI_PLAT) && !defined(CONFIG_DM_SCSI)
349 # if defined(CONFIG_DM_PCI)
350 struct udevice *dev = probe_ent->dev;
352 pci_dev_t pdev = probe_ent->dev;
356 void __iomem *mmio = probe_ent->mmio_base;
357 u32 vers, cap, cap2, impl, speed;
361 vers = readl(mmio + HOST_VERSION);
362 cap = probe_ent->cap;
363 cap2 = readl(mmio + HOST_CAP2);
364 impl = probe_ent->port_map;
366 speed = (cap >> 20) & 0xf;
376 #if defined(CONFIG_SCSI_AHCI_PLAT) || defined(CONFIG_DM_SCSI)
379 # ifdef CONFIG_DM_PCI
380 dm_pci_read_config16(dev, 0x0a, &cc);
382 pci_read_config_word(pdev, 0x0a, &cc);
386 else if (cc == 0x0106)
388 else if (cc == 0x0104)
393 printf("AHCI %02x%02x.%02x%02x "
394 "%u slots %u ports %s Gbps 0x%x impl %s mode\n",
399 ((cap >> 8) & 0x1f) + 1, (cap & 0x1f) + 1, speed_s, impl, scc_s);
405 cap & (1 << 31) ? "64bit " : "",
406 cap & (1 << 30) ? "ncq " : "",
407 cap & (1 << 28) ? "ilck " : "",
408 cap & (1 << 27) ? "stag " : "",
409 cap & (1 << 26) ? "pm " : "",
410 cap & (1 << 25) ? "led " : "",
411 cap & (1 << 24) ? "clo " : "",
412 cap & (1 << 19) ? "nz " : "",
413 cap & (1 << 18) ? "only " : "",
414 cap & (1 << 17) ? "pmp " : "",
415 cap & (1 << 16) ? "fbss " : "",
416 cap & (1 << 15) ? "pio " : "",
417 cap & (1 << 14) ? "slum " : "",
418 cap & (1 << 13) ? "part " : "",
419 cap & (1 << 7) ? "ccc " : "",
420 cap & (1 << 6) ? "ems " : "",
421 cap & (1 << 5) ? "sxs " : "",
422 cap2 & (1 << 2) ? "apst " : "",
423 cap2 & (1 << 1) ? "nvmp " : "",
424 cap2 & (1 << 0) ? "boh " : "");
427 #ifndef CONFIG_SCSI_AHCI_PLAT
428 # if defined(CONFIG_DM_PCI) || defined(CONFIG_DM_SCSI)
429 static int ahci_init_one(struct udevice *dev)
431 static int ahci_init_one(pci_dev_t dev)
434 #if !defined(CONFIG_DM_SCSI)
439 probe_ent = malloc(sizeof(struct ahci_uc_priv));
441 printf("%s: No memory for probe_ent\n", __func__);
445 memset(probe_ent, 0, sizeof(struct ahci_uc_priv));
446 probe_ent->dev = dev;
448 probe_ent->host_flags = ATA_FLAG_SATA
453 probe_ent->pio_mask = 0x1f;
454 probe_ent->udma_mask = 0x7f; /*Fixme,assume to support UDMA6 */
456 #if !defined(CONFIG_DM_SCSI)
458 probe_ent->mmio_base = dm_pci_map_bar(dev, PCI_BASE_ADDRESS_5,
462 * JMicron-specific fixup:
463 * make sure we're in AHCI mode
465 dm_pci_read_config16(dev, PCI_VENDOR_ID, &vendor);
466 if (vendor == 0x197b)
467 dm_pci_write_config8(dev, 0x41, 0xa1);
469 probe_ent->mmio_base = pci_map_bar(dev, PCI_BASE_ADDRESS_5,
473 * JMicron-specific fixup:
474 * make sure we're in AHCI mode
476 pci_read_config_word(dev, PCI_VENDOR_ID, &vendor);
477 if (vendor == 0x197b)
478 pci_write_config_byte(dev, 0x41, 0xa1);
481 struct scsi_platdata *plat = dev_get_uclass_platdata(dev);
482 probe_ent->mmio_base = (void *)plat->base;
485 debug("ahci mmio_base=0x%p\n", probe_ent->mmio_base);
486 /* initialize adapter */
487 rc = ahci_host_init(probe_ent);
491 ahci_print_info(probe_ent);
500 #define MAX_DATA_BYTE_COUNT (4*1024*1024)
502 static int ahci_fill_sg(u8 port, unsigned char *buf, int buf_len)
504 struct ahci_ioports *pp = &(probe_ent->port[port]);
505 struct ahci_sg *ahci_sg = pp->cmd_tbl_sg;
509 sg_count = ((buf_len - 1) / MAX_DATA_BYTE_COUNT) + 1;
510 if (sg_count > AHCI_MAX_SG) {
511 printf("Error:Too much sg!\n");
515 for (i = 0; i < sg_count; i++) {
517 cpu_to_le32((unsigned long) buf + i * MAX_DATA_BYTE_COUNT);
518 ahci_sg->addr_hi = 0;
519 ahci_sg->flags_size = cpu_to_le32(0x3fffff &
520 (buf_len < MAX_DATA_BYTE_COUNT
522 : (MAX_DATA_BYTE_COUNT - 1)));
524 buf_len -= MAX_DATA_BYTE_COUNT;
531 static void ahci_fill_cmd_slot(struct ahci_ioports *pp, u32 opts)
533 pp->cmd_slot->opts = cpu_to_le32(opts);
534 pp->cmd_slot->status = 0;
535 pp->cmd_slot->tbl_addr = cpu_to_le32((u32)pp->cmd_tbl & 0xffffffff);
536 #ifdef CONFIG_PHYS_64BIT
537 pp->cmd_slot->tbl_addr_hi =
538 cpu_to_le32((u32)(((pp->cmd_tbl) >> 16) >> 16));
542 static int wait_spinup(void __iomem *port_mmio)
547 start = get_timer(0);
549 tf_data = readl(port_mmio + PORT_TFDATA);
550 if (!(tf_data & ATA_BUSY))
552 } while (get_timer(start) < WAIT_MS_SPINUP);
557 static int ahci_port_start(struct ahci_uc_priv *probe_ent, u8 port)
559 struct ahci_ioports *pp = &(probe_ent->port[port]);
560 void __iomem *port_mmio = pp->port_mmio;
564 debug("Enter start port: %d\n", port);
565 port_status = readl(port_mmio + PORT_SCR_STAT);
566 debug("Port %d status: %x\n", port, port_status);
567 if ((port_status & 0xf) != 0x03) {
568 printf("No Link on this port!\n");
572 mem = malloc(AHCI_PORT_PRIV_DMA_SZ + 2048);
575 printf("%s: No mem for table!\n", __func__);
579 /* Aligned to 2048-bytes */
580 mem = memalign(2048, AHCI_PORT_PRIV_DMA_SZ);
581 memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ);
584 * First item in chunk of DMA memory: 32-slot command table,
585 * 32 bytes each in size
588 (struct ahci_cmd_hdr *)(uintptr_t)virt_to_phys((void *)mem);
589 debug("cmd_slot = %p\n", pp->cmd_slot);
590 mem += (AHCI_CMD_SLOT_SZ + 224);
593 * Second item: Received-FIS area
595 pp->rx_fis = virt_to_phys((void *)mem);
596 mem += AHCI_RX_FIS_SZ;
599 * Third item: data area for storing a single command
600 * and its scatter-gather table
602 pp->cmd_tbl = virt_to_phys((void *)mem);
603 debug("cmd_tbl_dma = %lx\n", pp->cmd_tbl);
605 mem += AHCI_CMD_TBL_HDR;
607 (struct ahci_sg *)(uintptr_t)virt_to_phys((void *)mem);
609 writel_with_flush((unsigned long)pp->cmd_slot,
610 port_mmio + PORT_LST_ADDR);
612 writel_with_flush(pp->rx_fis, port_mmio + PORT_FIS_ADDR);
614 #ifdef CONFIG_SUNXI_AHCI
615 sunxi_dma_init(port_mmio);
618 writel_with_flush(PORT_CMD_ICC_ACTIVE | PORT_CMD_FIS_RX |
619 PORT_CMD_POWER_ON | PORT_CMD_SPIN_UP |
620 PORT_CMD_START, port_mmio + PORT_CMD);
622 debug("Exit start port %d\n", port);
625 * Make sure interface is not busy based on error and status
626 * information from task file data register before proceeding
628 return wait_spinup(port_mmio);
632 static int ahci_device_data_io(u8 port, u8 *fis, int fis_len, u8 *buf,
633 int buf_len, u8 is_write)
636 struct ahci_ioports *pp = &(probe_ent->port[port]);
637 void __iomem *port_mmio = pp->port_mmio;
642 debug("Enter %s: for port %d\n", __func__, port);
644 if (port > probe_ent->n_ports) {
645 printf("Invalid port number %d\n", port);
649 port_status = readl(port_mmio + PORT_SCR_STAT);
650 if ((port_status & 0xf) != 0x03) {
651 debug("No Link on port %d!\n", port);
655 memcpy((unsigned char *)pp->cmd_tbl, fis, fis_len);
657 sg_count = ahci_fill_sg(port, buf, buf_len);
658 opts = (fis_len >> 2) | (sg_count << 16) | (is_write << 6);
659 ahci_fill_cmd_slot(pp, opts);
661 ahci_dcache_flush_sata_cmd(pp);
662 ahci_dcache_flush_range((unsigned long)buf, (unsigned long)buf_len);
664 writel_with_flush(1, port_mmio + PORT_CMD_ISSUE);
666 if (waiting_for_cmd_completed(port_mmio + PORT_CMD_ISSUE,
667 WAIT_MS_DATAIO, 0x1)) {
668 printf("timeout exit!\n");
672 ahci_dcache_invalidate_range((unsigned long)buf,
673 (unsigned long)buf_len);
674 debug("%s: %d byte transferred.\n", __func__, pp->cmd_slot->status);
680 static char *ata_id_strcpy(u16 *target, u16 *src, int len)
683 for (i = 0; i < len / 2; i++)
684 target[i] = swab16(src[i]);
685 return (char *)target;
689 * SCSI INQUIRY command operation.
691 static int ata_scsiop_inquiry(struct ahci_uc_priv *uc_priv,
692 struct scsi_cmd *pccb)
694 static const u8 hdr[] = {
697 0x5, /* claim SPC-3 version compatibility */
703 ALLOC_CACHE_ALIGN_BUFFER(u16, tmpid, ATA_ID_WORDS);
706 /* Clean ccb data buffer */
707 memset(pccb->pdata, 0, pccb->datalen);
709 memcpy(pccb->pdata, hdr, sizeof(hdr));
711 if (pccb->datalen <= 35)
714 memset(fis, 0, sizeof(fis));
715 /* Construct the FIS */
716 fis[0] = 0x27; /* Host to device FIS. */
717 fis[1] = 1 << 7; /* Command FIS. */
718 fis[2] = ATA_CMD_ID_ATA; /* Command byte. */
720 /* Read id from sata */
723 if (ahci_device_data_io(port, (u8 *) &fis, sizeof(fis), (u8 *)tmpid,
724 ATA_ID_WORDS * 2, 0)) {
725 debug("scsi_ahci: SCSI inquiry command failure.\n");
729 if (!uc_priv->ataid[port]) {
730 uc_priv->ataid[port] = malloc(ATA_ID_WORDS * 2);
731 if (!uc_priv->ataid[port]) {
732 printf("%s: No memory for ataid[port]\n", __func__);
737 idbuf = uc_priv->ataid[port];
739 memcpy(idbuf, tmpid, ATA_ID_WORDS * 2);
740 ata_swap_buf_le16(idbuf, ATA_ID_WORDS);
742 memcpy(&pccb->pdata[8], "ATA ", 8);
743 ata_id_strcpy((u16 *)&pccb->pdata[16], &idbuf[ATA_ID_PROD], 16);
744 ata_id_strcpy((u16 *)&pccb->pdata[32], &idbuf[ATA_ID_FW_REV], 4);
754 * SCSI READ10/WRITE10 command operation.
756 static int ata_scsiop_read_write(struct scsi_cmd *pccb, u8 is_write)
761 u8 *user_buffer = pccb->pdata;
762 u32 user_buffer_size = pccb->datalen;
764 /* Retrieve the base LBA number from the ccb structure. */
765 if (pccb->cmd[0] == SCSI_READ16) {
766 memcpy(&lba, pccb->cmd + 2, 8);
767 lba = be64_to_cpu(lba);
770 memcpy(&temp, pccb->cmd + 2, 4);
771 lba = be32_to_cpu(temp);
775 * Retrieve the base LBA number and the block count from
778 * For 10-byte and 16-byte SCSI R/W commands, transfer
779 * length 0 means transfer 0 block of data.
780 * However, for ATA R/W commands, sector count 0 means
781 * 256 or 65536 sectors, not 0 sectors as in SCSI.
783 * WARNING: one or two older ATA drives treat 0 as 0...
785 if (pccb->cmd[0] == SCSI_READ16)
786 blocks = (((u16)pccb->cmd[13]) << 8) | ((u16) pccb->cmd[14]);
788 blocks = (((u16)pccb->cmd[7]) << 8) | ((u16) pccb->cmd[8]);
790 debug("scsi_ahci: %s %u blocks starting from lba 0x" LBAFU "\n",
791 is_write ? "write" : "read", blocks, lba);
794 memset(fis, 0, sizeof(fis));
795 fis[0] = 0x27; /* Host to device FIS. */
796 fis[1] = 1 << 7; /* Command FIS. */
797 /* Command byte (read/write). */
798 fis[2] = is_write ? ATA_CMD_WRITE_EXT : ATA_CMD_READ_EXT;
801 u16 now_blocks; /* number of blocks per iteration */
802 u32 transfer_size; /* number of bytes per iteration */
804 now_blocks = min((u16)MAX_SATA_BLOCKS_READ_WRITE, blocks);
806 transfer_size = ATA_SECT_SIZE * now_blocks;
807 if (transfer_size > user_buffer_size) {
808 printf("scsi_ahci: Error: buffer too small.\n");
813 * LBA48 SATA command but only use 32bit address range within
814 * that (unless we've enabled 64bit LBA support). The next
815 * smaller command range (28bit) is too small.
817 fis[4] = (lba >> 0) & 0xff;
818 fis[5] = (lba >> 8) & 0xff;
819 fis[6] = (lba >> 16) & 0xff;
820 fis[7] = 1 << 6; /* device reg: set LBA mode */
821 fis[8] = ((lba >> 24) & 0xff);
822 #ifdef CONFIG_SYS_64BIT_LBA
823 if (pccb->cmd[0] == SCSI_READ16) {
824 fis[9] = ((lba >> 32) & 0xff);
825 fis[10] = ((lba >> 40) & 0xff);
829 fis[3] = 0xe0; /* features */
831 /* Block (sector) count */
832 fis[12] = (now_blocks >> 0) & 0xff;
833 fis[13] = (now_blocks >> 8) & 0xff;
835 /* Read/Write from ahci */
836 if (ahci_device_data_io(pccb->target, (u8 *) &fis, sizeof(fis),
837 user_buffer, transfer_size,
839 debug("scsi_ahci: SCSI %s10 command failure.\n",
840 is_write ? "WRITE" : "READ");
844 /* If this transaction is a write, do a following flush.
845 * Writes in u-boot are so rare, and the logic to know when is
846 * the last write and do a flush only there is sufficiently
847 * difficult. Just do a flush after every write. This incurs,
848 * usually, one extra flush when the rare writes do happen.
851 if (-EIO == ata_io_flush(pccb->target))
854 user_buffer += transfer_size;
855 user_buffer_size -= transfer_size;
856 blocks -= now_blocks;
865 * SCSI READ CAPACITY10 command operation.
867 static int ata_scsiop_read_capacity10(struct ahci_uc_priv *uc_priv,
868 struct scsi_cmd *pccb)
874 if (!uc_priv->ataid[pccb->target]) {
875 printf("scsi_ahci: SCSI READ CAPACITY10 command failure. "
877 "\tPlease run SCSI command INQUIRY first!\n");
881 cap64 = ata_id_n_sectors(uc_priv->ataid[pccb->target]);
882 if (cap64 > 0x100000000ULL)
885 cap = cpu_to_be32(cap64);
886 memcpy(pccb->pdata, &cap, sizeof(cap));
888 block_size = cpu_to_be32((u32)512);
889 memcpy(&pccb->pdata[4], &block_size, 4);
896 * SCSI READ CAPACITY16 command operation.
898 static int ata_scsiop_read_capacity16(struct ahci_uc_priv *uc_priv,
899 struct scsi_cmd *pccb)
904 if (!uc_priv->ataid[pccb->target]) {
905 printf("scsi_ahci: SCSI READ CAPACITY16 command failure. "
907 "\tPlease run SCSI command INQUIRY first!\n");
911 cap = ata_id_n_sectors(uc_priv->ataid[pccb->target]);
912 cap = cpu_to_be64(cap);
913 memcpy(pccb->pdata, &cap, sizeof(cap));
915 block_size = cpu_to_be64((u64)512);
916 memcpy(&pccb->pdata[8], &block_size, 8);
923 * SCSI TEST UNIT READY command operation.
925 static int ata_scsiop_test_unit_ready(struct ahci_uc_priv *uc_priv,
926 struct scsi_cmd *pccb)
928 return (uc_priv->ataid[pccb->target]) ? 0 : -EPERM;
932 int scsi_exec(struct scsi_cmd *pccb)
934 struct ahci_uc_priv *uc_priv = probe_ent;
937 switch (pccb->cmd[0]) {
940 ret = ata_scsiop_read_write(pccb, 0);
943 ret = ata_scsiop_read_write(pccb, 1);
945 case SCSI_RD_CAPAC10:
946 ret = ata_scsiop_read_capacity10(uc_priv, pccb);
948 case SCSI_RD_CAPAC16:
949 ret = ata_scsiop_read_capacity16(uc_priv, pccb);
952 ret = ata_scsiop_test_unit_ready(uc_priv, pccb);
955 ret = ata_scsiop_inquiry(uc_priv, pccb);
958 printf("Unsupport SCSI command 0x%02x\n", pccb->cmd[0]);
963 debug("SCSI command 0x%02x ret errno %d\n", pccb->cmd[0], ret);
970 #if defined(CONFIG_DM_SCSI)
971 void scsi_low_level_init(int busdevfunc, struct udevice *dev)
973 void scsi_low_level_init(int busdevfunc)
979 #ifndef CONFIG_SCSI_AHCI_PLAT
980 # if defined(CONFIG_DM_PCI)
984 ret = dm_pci_bus_find_bdf(busdevfunc, &dev);
988 # elif defined(CONFIG_DM_SCSI)
991 ahci_init_one(busdevfunc);
995 linkmap = probe_ent->link_port_map;
997 for (i = 0; i < CONFIG_SYS_SCSI_MAX_SCSI_ID; i++) {
998 if (((linkmap >> i) & 0x01)) {
999 if (ahci_port_start(probe_ent, (u8) i)) {
1000 printf("Can not start port %d\n", i);
1007 #ifdef CONFIG_SCSI_AHCI_PLAT
1008 int ahci_init(void __iomem *base)
1013 probe_ent = malloc(sizeof(struct ahci_uc_priv));
1015 printf("%s: No memory for probe_ent\n", __func__);
1019 memset(probe_ent, 0, sizeof(struct ahci_uc_priv));
1021 probe_ent->host_flags = ATA_FLAG_SATA
1022 | ATA_FLAG_NO_LEGACY
1025 | ATA_FLAG_NO_ATAPI;
1026 probe_ent->pio_mask = 0x1f;
1027 probe_ent->udma_mask = 0x7f; /*Fixme,assume to support UDMA6 */
1029 probe_ent->mmio_base = base;
1031 /* initialize adapter */
1032 rc = ahci_host_init(probe_ent);
1036 ahci_print_info(probe_ent);
1038 linkmap = probe_ent->link_port_map;
1040 for (i = 0; i < CONFIG_SYS_SCSI_MAX_SCSI_ID; i++) {
1041 if (((linkmap >> i) & 0x01)) {
1042 if (ahci_port_start(probe_ent, (u8) i)) {
1043 printf("Can not start port %d\n", i);
1052 void __weak scsi_init(void)
1059 * In the general case of generic rotating media it makes sense to have a
1060 * flush capability. It probably even makes sense in the case of SSDs because
1061 * one cannot always know for sure what kind of internal cache/flush mechanism
1062 * is embodied therein. At first it was planned to invoke this after the last
1063 * write to disk and before rebooting. In practice, knowing, a priori, which
1064 * is the last write is difficult. Because writing to the disk in u-boot is
1065 * very rare, this flush command will be invoked after every block write.
1067 static int ata_io_flush(u8 port)
1070 struct ahci_ioports *pp = &(probe_ent->port[port]);
1071 void __iomem *port_mmio = pp->port_mmio;
1072 u32 cmd_fis_len = 5; /* five dwords */
1074 /* Preset the FIS */
1076 fis[0] = 0x27; /* Host to device FIS. */
1077 fis[1] = 1 << 7; /* Command FIS. */
1078 fis[2] = ATA_CMD_FLUSH_EXT;
1080 memcpy((unsigned char *)pp->cmd_tbl, fis, 20);
1081 ahci_fill_cmd_slot(pp, cmd_fis_len);
1082 ahci_dcache_flush_sata_cmd(pp);
1083 writel_with_flush(1, port_mmio + PORT_CMD_ISSUE);
1085 if (waiting_for_cmd_completed(port_mmio + PORT_CMD_ISSUE,
1086 WAIT_MS_FLUSH, 0x1)) {
1087 debug("scsi_ahci: flush command timeout on port %d.\n", port);
1095 __weak void scsi_bus_reset(void)