/* * Copyright (C) Freescale Semiconductor, Inc. 2006. * Author: Jason Jin * Zhang Wei * * SPDX-License-Identifier: GPL-2.0+ * * with the reference on libata and ahci drvier in kernel */ #include #include #include #include #include #include #include #include #include #include #include #include static int ata_io_flush(u8 port); struct ahci_probe_ent *probe_ent = NULL; u16 *ataid[AHCI_MAX_PORTS]; #define writel_with_flush(a,b) do { writel(a,b); readl(b); } while (0) /* * Some controllers limit number of blocks they can read/write at once. * Contemporary SSD devices work much faster if the read/write size is aligned * to a power of 2. Let's set default to 128 and allowing to be overwritten if * needed. */ #ifndef MAX_SATA_BLOCKS_READ_WRITE #define MAX_SATA_BLOCKS_READ_WRITE 0x80 #endif /* Maximum timeouts for each event */ #define WAIT_MS_SPINUP 20000 #define WAIT_MS_DATAIO 10000 #define WAIT_MS_FLUSH 5000 #define WAIT_MS_LINKUP 200 static inline void __iomem *ahci_port_base(void __iomem *base, u32 port) { return base + 0x100 + (port * 0x80); } static void ahci_setup_port(struct ahci_ioports *port, void __iomem *base, unsigned int port_idx) { base = ahci_port_base(base, port_idx); port->cmd_addr = base; port->scr_addr = base + PORT_SCR; } #define msleep(a) udelay(a * 1000) static void ahci_dcache_flush_range(unsigned long begin, unsigned long len) { const unsigned long start = begin; const unsigned long end = start + len; debug("%s: flush dcache: [%#lx, %#lx)\n", __func__, start, end); flush_dcache_range(start, end); } /* * SATA controller DMAs to physical RAM. Ensure data from the * controller is invalidated from dcache; next access comes from * physical RAM. */ static void ahci_dcache_invalidate_range(unsigned long begin, unsigned long len) { const unsigned long start = begin; const unsigned long end = start + len; debug("%s: invalidate dcache: [%#lx, %#lx)\n", __func__, start, end); invalidate_dcache_range(start, end); } /* * Ensure data for SATA controller is flushed out of dcache and * written to physical memory. */ static void ahci_dcache_flush_sata_cmd(struct ahci_ioports *pp) { ahci_dcache_flush_range((unsigned long)pp->cmd_slot, AHCI_PORT_PRIV_DMA_SZ); } static int waiting_for_cmd_completed(void __iomem *offset, int timeout_msec, u32 sign) { int i; u32 status; for (i = 0; ((status = readl(offset)) & sign) && i < timeout_msec; i++) msleep(1); return (i < timeout_msec) ? 0 : -1; } int __weak ahci_link_up(struct ahci_probe_ent *probe_ent, u8 port) { u32 tmp; int j = 0; void __iomem *port_mmio = probe_ent->port[port].port_mmio; /* * Bring up SATA link. * SATA link bringup time is usually less than 1 ms; only very * rarely has it taken between 1-2 ms. Never seen it above 2 ms. */ while (j < WAIT_MS_LINKUP) { tmp = readl(port_mmio + PORT_SCR_STAT); tmp &= PORT_SCR_STAT_DET_MASK; if (tmp == PORT_SCR_STAT_DET_PHYRDY) return 0; udelay(1000); j++; } return 1; } #ifdef CONFIG_SUNXI_AHCI /* The sunxi AHCI controller requires this undocumented setup */ static void sunxi_dma_init(void __iomem *port_mmio) { clrsetbits_le32(port_mmio + PORT_P0DMACR, 0x0000ff00, 0x00004400); } #endif int ahci_reset(void __iomem *base) { int i = 1000; u32 __iomem *host_ctl_reg = base + HOST_CTL; u32 tmp = readl(host_ctl_reg); /* global controller reset */ if ((tmp & HOST_RESET) == 0) writel_with_flush(tmp | HOST_RESET, host_ctl_reg); /* * reset must complete within 1 second, or * the hardware should be considered fried. */ do { udelay(1000); tmp = readl(host_ctl_reg); i--; } while ((i > 0) && (tmp & HOST_RESET)); if (i == 0) { printf("controller reset failed (0x%x)\n", tmp); return -1; } return 0; } static int ahci_host_init(struct ahci_probe_ent *probe_ent) { #ifndef CONFIG_SCSI_AHCI_PLAT pci_dev_t pdev = probe_ent->dev; u16 tmp16; unsigned short vendor; #endif void __iomem *mmio = probe_ent->mmio_base; u32 tmp, cap_save, cmd; int i, j, ret; void __iomem *port_mmio; u32 port_map; debug("ahci_host_init: start\n"); cap_save = readl(mmio + HOST_CAP); cap_save &= ((1 << 28) | (1 << 17)); cap_save |= (1 << 27); /* Staggered Spin-up. Not needed. */ ret = ahci_reset(probe_ent->mmio_base); if (ret) return ret; writel_with_flush(HOST_AHCI_EN, mmio + HOST_CTL); writel(cap_save, mmio + HOST_CAP); writel_with_flush(0xf, mmio + HOST_PORTS_IMPL); #ifndef CONFIG_SCSI_AHCI_PLAT pci_read_config_word(pdev, PCI_VENDOR_ID, &vendor); if (vendor == PCI_VENDOR_ID_INTEL) { u16 tmp16; pci_read_config_word(pdev, 0x92, &tmp16); tmp16 |= 0xf; pci_write_config_word(pdev, 0x92, tmp16); } #endif probe_ent->cap = readl(mmio + HOST_CAP); probe_ent->port_map = readl(mmio + HOST_PORTS_IMPL); port_map = probe_ent->port_map; probe_ent->n_ports = (probe_ent->cap & 0x1f) + 1; debug("cap 0x%x port_map 0x%x n_ports %d\n", probe_ent->cap, probe_ent->port_map, probe_ent->n_ports); if (probe_ent->n_ports > CONFIG_SYS_SCSI_MAX_SCSI_ID) probe_ent->n_ports = CONFIG_SYS_SCSI_MAX_SCSI_ID; for (i = 0; i < probe_ent->n_ports; i++) { if (!(port_map & (1 << i))) continue; probe_ent->port[i].port_mmio = ahci_port_base(mmio, i); port_mmio = (u8 *) probe_ent->port[i].port_mmio; ahci_setup_port(&probe_ent->port[i], mmio, i); /* make sure port is not active */ tmp = readl(port_mmio + PORT_CMD); if (tmp & (PORT_CMD_LIST_ON | PORT_CMD_FIS_ON | PORT_CMD_FIS_RX | PORT_CMD_START)) { debug("Port %d is active. Deactivating.\n", i); tmp &= ~(PORT_CMD_LIST_ON | PORT_CMD_FIS_ON | PORT_CMD_FIS_RX | PORT_CMD_START); writel_with_flush(tmp, port_mmio + PORT_CMD); /* spec says 500 msecs for each bit, so * this is slightly incorrect. */ msleep(500); } #ifdef CONFIG_SUNXI_AHCI sunxi_dma_init(port_mmio); #endif /* Add the spinup command to whatever mode bits may * already be on in the command register. */ cmd = readl(port_mmio + PORT_CMD); cmd |= PORT_CMD_SPIN_UP; writel_with_flush(cmd, port_mmio + PORT_CMD); /* Bring up SATA link. */ ret = ahci_link_up(probe_ent, i); if (ret) { printf("SATA link %d timeout.\n", i); continue; } else { debug("SATA link ok.\n"); } /* Clear error status */ tmp = readl(port_mmio + PORT_SCR_ERR); if (tmp) writel(tmp, port_mmio + PORT_SCR_ERR); debug("Spinning up device on SATA port %d... ", i); j = 0; while (j < WAIT_MS_SPINUP) { tmp = readl(port_mmio + PORT_TFDATA); if (!(tmp & (ATA_BUSY | ATA_DRQ))) break; udelay(1000); tmp = readl(port_mmio + PORT_SCR_STAT); tmp &= PORT_SCR_STAT_DET_MASK; if (tmp == PORT_SCR_STAT_DET_PHYRDY) break; j++; } tmp = readl(port_mmio + PORT_SCR_STAT) & PORT_SCR_STAT_DET_MASK; if (tmp == PORT_SCR_STAT_DET_COMINIT) { debug("SATA link %d down (COMINIT received), retrying...\n", i); i--; continue; } printf("Target spinup took %d ms.\n", j); if (j == WAIT_MS_SPINUP) debug("timeout.\n"); else debug("ok.\n"); tmp = readl(port_mmio + PORT_SCR_ERR); debug("PORT_SCR_ERR 0x%x\n", tmp); writel(tmp, port_mmio + PORT_SCR_ERR); /* ack any pending irq events for this port */ tmp = readl(port_mmio + PORT_IRQ_STAT); debug("PORT_IRQ_STAT 0x%x\n", tmp); if (tmp) writel(tmp, port_mmio + PORT_IRQ_STAT); writel(1 << i, mmio + HOST_IRQ_STAT); /* register linkup ports */ tmp = readl(port_mmio + PORT_SCR_STAT); debug("SATA port %d status: 0x%x\n", i, tmp); if ((tmp & PORT_SCR_STAT_DET_MASK) == PORT_SCR_STAT_DET_PHYRDY) probe_ent->link_port_map |= (0x01 << i); } tmp = readl(mmio + HOST_CTL); debug("HOST_CTL 0x%x\n", tmp); writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL); tmp = readl(mmio + HOST_CTL); debug("HOST_CTL 0x%x\n", tmp); #ifndef CONFIG_SCSI_AHCI_PLAT pci_read_config_word(pdev, PCI_COMMAND, &tmp16); tmp |= PCI_COMMAND_MASTER; pci_write_config_word(pdev, PCI_COMMAND, tmp16); #endif return 0; } static void ahci_print_info(struct ahci_probe_ent *probe_ent) { #ifndef CONFIG_SCSI_AHCI_PLAT pci_dev_t pdev = probe_ent->dev; u16 cc; #endif void __iomem *mmio = probe_ent->mmio_base; u32 vers, cap, cap2, impl, speed; const char *speed_s; const char *scc_s; vers = readl(mmio + HOST_VERSION); cap = probe_ent->cap; cap2 = readl(mmio + HOST_CAP2); impl = probe_ent->port_map; speed = (cap >> 20) & 0xf; if (speed == 1) speed_s = "1.5"; else if (speed == 2) speed_s = "3"; else if (speed == 3) speed_s = "6"; else speed_s = "?"; #ifdef CONFIG_SCSI_AHCI_PLAT scc_s = "SATA"; #else pci_read_config_word(pdev, 0x0a, &cc); if (cc == 0x0101) scc_s = "IDE"; else if (cc == 0x0106) scc_s = "SATA"; else if (cc == 0x0104) scc_s = "RAID"; else scc_s = "unknown"; #endif printf("AHCI %02x%02x.%02x%02x " "%u slots %u ports %s Gbps 0x%x impl %s mode\n", (vers >> 24) & 0xff, (vers >> 16) & 0xff, (vers >> 8) & 0xff, vers & 0xff, ((cap >> 8) & 0x1f) + 1, (cap & 0x1f) + 1, speed_s, impl, scc_s); printf("flags: " "%s%s%s%s%s%s%s" "%s%s%s%s%s%s%s" "%s%s%s%s%s%s\n", cap & (1 << 31) ? "64bit " : "", cap & (1 << 30) ? "ncq " : "", cap & (1 << 28) ? "ilck " : "", cap & (1 << 27) ? "stag " : "", cap & (1 << 26) ? "pm " : "", cap & (1 << 25) ? "led " : "", cap & (1 << 24) ? "clo " : "", cap & (1 << 19) ? "nz " : "", cap & (1 << 18) ? "only " : "", cap & (1 << 17) ? "pmp " : "", cap & (1 << 16) ? "fbss " : "", cap & (1 << 15) ? "pio " : "", cap & (1 << 14) ? "slum " : "", cap & (1 << 13) ? "part " : "", cap & (1 << 7) ? "ccc " : "", cap & (1 << 6) ? "ems " : "", cap & (1 << 5) ? "sxs " : "", cap2 & (1 << 2) ? "apst " : "", cap2 & (1 << 1) ? "nvmp " : "", cap2 & (1 << 0) ? "boh " : ""); } #ifndef CONFIG_SCSI_AHCI_PLAT static int ahci_init_one(pci_dev_t pdev) { u16 vendor; int rc; probe_ent = malloc(sizeof(struct ahci_probe_ent)); if (!probe_ent) { printf("%s: No memory for probe_ent\n", __func__); return -ENOMEM; } memset(probe_ent, 0, sizeof(struct ahci_probe_ent)); probe_ent->dev = pdev; probe_ent->host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA | ATA_FLAG_NO_ATAPI; probe_ent->pio_mask = 0x1f; probe_ent->udma_mask = 0x7f; /*Fixme,assume to support UDMA6 */ probe_ent->mmio_base = pci_map_bar(pdev, PCI_BASE_ADDRESS_5, PCI_REGION_MEM); debug("ahci mmio_base=0x%p\n", probe_ent->mmio_base); /* Take from kernel: * JMicron-specific fixup: * make sure we're in AHCI mode */ pci_read_config_word(pdev, PCI_VENDOR_ID, &vendor); if (vendor == 0x197b) pci_write_config_byte(pdev, 0x41, 0xa1); /* initialize adapter */ rc = ahci_host_init(probe_ent); if (rc) goto err_out; ahci_print_info(probe_ent); return 0; err_out: return rc; } #endif #define MAX_DATA_BYTE_COUNT (4*1024*1024) static int ahci_fill_sg(u8 port, unsigned char *buf, int buf_len) { struct ahci_ioports *pp = &(probe_ent->port[port]); struct ahci_sg *ahci_sg = pp->cmd_tbl_sg; u32 sg_count; int i; sg_count = ((buf_len - 1) / MAX_DATA_BYTE_COUNT) + 1; if (sg_count > AHCI_MAX_SG) { printf("Error:Too much sg!\n"); return -1; } for (i = 0; i < sg_count; i++) { ahci_sg->addr = cpu_to_le32((unsigned long) buf + i * MAX_DATA_BYTE_COUNT); ahci_sg->addr_hi = 0; ahci_sg->flags_size = cpu_to_le32(0x3fffff & (buf_len < MAX_DATA_BYTE_COUNT ? (buf_len - 1) : (MAX_DATA_BYTE_COUNT - 1))); ahci_sg++; buf_len -= MAX_DATA_BYTE_COUNT; } return sg_count; } static void ahci_fill_cmd_slot(struct ahci_ioports *pp, u32 opts) { pp->cmd_slot->opts = cpu_to_le32(opts); pp->cmd_slot->status = 0; pp->cmd_slot->tbl_addr = cpu_to_le32((u32)pp->cmd_tbl & 0xffffffff); #ifdef CONFIG_PHYS_64BIT pp->cmd_slot->tbl_addr_hi = cpu_to_le32((u32)(((pp->cmd_tbl) >> 16) >> 16)); #endif } static int wait_spinup(void __iomem *port_mmio) { ulong start; u32 tf_data; start = get_timer(0); do { tf_data = readl(port_mmio + PORT_TFDATA); if (!(tf_data & ATA_BUSY)) return 0; } while (get_timer(start) < WAIT_MS_SPINUP); return -ETIMEDOUT; } static int ahci_port_start(u8 port) { struct ahci_ioports *pp = &(probe_ent->port[port]); void __iomem *port_mmio = pp->port_mmio; u32 port_status; void __iomem *mem; debug("Enter start port: %d\n", port); port_status = readl(port_mmio + PORT_SCR_STAT); debug("Port %d status: %x\n", port, port_status); if ((port_status & 0xf) != 0x03) { printf("No Link on this port!\n"); return -1; } mem = malloc(AHCI_PORT_PRIV_DMA_SZ + 2048); if (!mem) { free(pp); printf("%s: No mem for table!\n", __func__); return -ENOMEM; } /* Aligned to 2048-bytes */ mem = memalign(2048, AHCI_PORT_PRIV_DMA_SZ); memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ); /* * First item in chunk of DMA memory: 32-slot command table, * 32 bytes each in size */ pp->cmd_slot = (struct ahci_cmd_hdr *)(uintptr_t)virt_to_phys((void *)mem); debug("cmd_slot = %p\n", pp->cmd_slot); mem += (AHCI_CMD_SLOT_SZ + 224); /* * Second item: Received-FIS area */ pp->rx_fis = virt_to_phys((void *)mem); mem += AHCI_RX_FIS_SZ; /* * Third item: data area for storing a single command * and its scatter-gather table */ pp->cmd_tbl = virt_to_phys((void *)mem); debug("cmd_tbl_dma = %lx\n", pp->cmd_tbl); mem += AHCI_CMD_TBL_HDR; pp->cmd_tbl_sg = (struct ahci_sg *)(uintptr_t)virt_to_phys((void *)mem); writel_with_flush((unsigned long)pp->cmd_slot, port_mmio + PORT_LST_ADDR); writel_with_flush(pp->rx_fis, port_mmio + PORT_FIS_ADDR); #ifdef CONFIG_SUNXI_AHCI sunxi_dma_init(port_mmio); #endif writel_with_flush(PORT_CMD_ICC_ACTIVE | PORT_CMD_FIS_RX | PORT_CMD_POWER_ON | PORT_CMD_SPIN_UP | PORT_CMD_START, port_mmio + PORT_CMD); debug("Exit start port %d\n", port); /* * Make sure interface is not busy based on error and status * information from task file data register before proceeding */ return wait_spinup(port_mmio); } static int ahci_device_data_io(u8 port, u8 *fis, int fis_len, u8 *buf, int buf_len, u8 is_write) { struct ahci_ioports *pp = &(probe_ent->port[port]); void __iomem *port_mmio = pp->port_mmio; u32 opts; u32 port_status; int sg_count; debug("Enter %s: for port %d\n", __func__, port); if (port > probe_ent->n_ports) { printf("Invalid port number %d\n", port); return -1; } port_status = readl(port_mmio + PORT_SCR_STAT); if ((port_status & 0xf) != 0x03) { debug("No Link on port %d!\n", port); return -1; } memcpy((unsigned char *)pp->cmd_tbl, fis, fis_len); sg_count = ahci_fill_sg(port, buf, buf_len); opts = (fis_len >> 2) | (sg_count << 16) | (is_write << 6); ahci_fill_cmd_slot(pp, opts); ahci_dcache_flush_sata_cmd(pp); ahci_dcache_flush_range((unsigned long)buf, (unsigned long)buf_len); writel_with_flush(1, port_mmio + PORT_CMD_ISSUE); if (waiting_for_cmd_completed(port_mmio + PORT_CMD_ISSUE, WAIT_MS_DATAIO, 0x1)) { printf("timeout exit!\n"); return -1; } ahci_dcache_invalidate_range((unsigned long)buf, (unsigned long)buf_len); debug("%s: %d byte transferred.\n", __func__, pp->cmd_slot->status); return 0; } static char *ata_id_strcpy(u16 *target, u16 *src, int len) { int i; for (i = 0; i < len / 2; i++) target[i] = swab16(src[i]); return (char *)target; } /* * SCSI INQUIRY command operation. */ static int ata_scsiop_inquiry(ccb *pccb) { static const u8 hdr[] = { 0, 0, 0x5, /* claim SPC-3 version compatibility */ 2, 95 - 4, }; u8 fis[20]; u16 *idbuf; ALLOC_CACHE_ALIGN_BUFFER(u16, tmpid, ATA_ID_WORDS); u8 port; /* Clean ccb data buffer */ memset(pccb->pdata, 0, pccb->datalen); memcpy(pccb->pdata, hdr, sizeof(hdr)); if (pccb->datalen <= 35) return 0; memset(fis, 0, sizeof(fis)); /* Construct the FIS */ fis[0] = 0x27; /* Host to device FIS. */ fis[1] = 1 << 7; /* Command FIS. */ fis[2] = ATA_CMD_ID_ATA; /* Command byte. */ /* Read id from sata */ port = pccb->target; if (ahci_device_data_io(port, (u8 *) &fis, sizeof(fis), (u8 *)tmpid, ATA_ID_WORDS * 2, 0)) { debug("scsi_ahci: SCSI inquiry command failure.\n"); return -EIO; } if (!ataid[port]) { ataid[port] = malloc(ATA_ID_WORDS * 2); if (!ataid[port]) { printf("%s: No memory for ataid[port]\n", __func__); return -ENOMEM; } } idbuf = ataid[port]; memcpy(idbuf, tmpid, ATA_ID_WORDS * 2); ata_swap_buf_le16(idbuf, ATA_ID_WORDS); memcpy(&pccb->pdata[8], "ATA ", 8); ata_id_strcpy((u16 *)&pccb->pdata[16], &idbuf[ATA_ID_PROD], 16); ata_id_strcpy((u16 *)&pccb->pdata[32], &idbuf[ATA_ID_FW_REV], 4); #ifdef DEBUG ata_dump_id(idbuf); #endif return 0; } /* * SCSI READ10/WRITE10 command operation. */ static int ata_scsiop_read_write(ccb *pccb, u8 is_write) { lbaint_t lba = 0; u16 blocks = 0; u8 fis[20]; u8 *user_buffer = pccb->pdata; u32 user_buffer_size = pccb->datalen; /* Retrieve the base LBA number from the ccb structure. */ if (pccb->cmd[0] == SCSI_READ16) { memcpy(&lba, pccb->cmd + 2, 8); lba = be64_to_cpu(lba); } else { u32 temp; memcpy(&temp, pccb->cmd + 2, 4); lba = be32_to_cpu(temp); } /* * Retrieve the base LBA number and the block count from * the ccb structure. * * For 10-byte and 16-byte SCSI R/W commands, transfer * length 0 means transfer 0 block of data. * However, for ATA R/W commands, sector count 0 means * 256 or 65536 sectors, not 0 sectors as in SCSI. * * WARNING: one or two older ATA drives treat 0 as 0... */ if (pccb->cmd[0] == SCSI_READ16) blocks = (((u16)pccb->cmd[13]) << 8) | ((u16) pccb->cmd[14]); else blocks = (((u16)pccb->cmd[7]) << 8) | ((u16) pccb->cmd[8]); debug("scsi_ahci: %s %u blocks starting from lba 0x" LBAFU "\n", is_write ? "write" : "read", blocks, lba); /* Preset the FIS */ memset(fis, 0, sizeof(fis)); fis[0] = 0x27; /* Host to device FIS. */ fis[1] = 1 << 7; /* Command FIS. */ /* Command byte (read/write). */ fis[2] = is_write ? ATA_CMD_WRITE_EXT : ATA_CMD_READ_EXT; while (blocks) { u16 now_blocks; /* number of blocks per iteration */ u32 transfer_size; /* number of bytes per iteration */ now_blocks = min((u16)MAX_SATA_BLOCKS_READ_WRITE, blocks); transfer_size = ATA_SECT_SIZE * now_blocks; if (transfer_size > user_buffer_size) { printf("scsi_ahci: Error: buffer too small.\n"); return -EIO; } /* * LBA48 SATA command but only use 32bit address range within * that (unless we've enabled 64bit LBA support). The next * smaller command range (28bit) is too small. */ fis[4] = (lba >> 0) & 0xff; fis[5] = (lba >> 8) & 0xff; fis[6] = (lba >> 16) & 0xff; fis[7] = 1 << 6; /* device reg: set LBA mode */ fis[8] = ((lba >> 24) & 0xff); #ifdef CONFIG_SYS_64BIT_LBA if (pccb->cmd[0] == SCSI_READ16) { fis[9] = ((lba >> 32) & 0xff); fis[10] = ((lba >> 40) & 0xff); } #endif fis[3] = 0xe0; /* features */ /* Block (sector) count */ fis[12] = (now_blocks >> 0) & 0xff; fis[13] = (now_blocks >> 8) & 0xff; /* Read/Write from ahci */ if (ahci_device_data_io(pccb->target, (u8 *) &fis, sizeof(fis), user_buffer, transfer_size, is_write)) { debug("scsi_ahci: SCSI %s10 command failure.\n", is_write ? "WRITE" : "READ"); return -EIO; } /* If this transaction is a write, do a following flush. * Writes in u-boot are so rare, and the logic to know when is * the last write and do a flush only there is sufficiently * difficult. Just do a flush after every write. This incurs, * usually, one extra flush when the rare writes do happen. */ if (is_write) { if (-EIO == ata_io_flush(pccb->target)) return -EIO; } user_buffer += transfer_size; user_buffer_size -= transfer_size; blocks -= now_blocks; lba += now_blocks; } return 0; } /* * SCSI READ CAPACITY10 command operation. */ static int ata_scsiop_read_capacity10(ccb *pccb) { u32 cap; u64 cap64; u32 block_size; if (!ataid[pccb->target]) { printf("scsi_ahci: SCSI READ CAPACITY10 command failure. " "\tNo ATA info!\n" "\tPlease run SCSI command INQUIRY firstly!\n"); return -EPERM; } cap64 = ata_id_n_sectors(ataid[pccb->target]); if (cap64 > 0x100000000ULL) cap64 = 0xffffffff; cap = cpu_to_be32(cap64); memcpy(pccb->pdata, &cap, sizeof(cap)); block_size = cpu_to_be32((u32)512); memcpy(&pccb->pdata[4], &block_size, 4); return 0; } /* * SCSI READ CAPACITY16 command operation. */ static int ata_scsiop_read_capacity16(ccb *pccb) { u64 cap; u64 block_size; if (!ataid[pccb->target]) { printf("scsi_ahci: SCSI READ CAPACITY16 command failure. " "\tNo ATA info!\n" "\tPlease run SCSI command INQUIRY firstly!\n"); return -EPERM; } cap = ata_id_n_sectors(ataid[pccb->target]); cap = cpu_to_be64(cap); memcpy(pccb->pdata, &cap, sizeof(cap)); block_size = cpu_to_be64((u64)512); memcpy(&pccb->pdata[8], &block_size, 8); return 0; } /* * SCSI TEST UNIT READY command operation. */ static int ata_scsiop_test_unit_ready(ccb *pccb) { return (ataid[pccb->target]) ? 0 : -EPERM; } int scsi_exec(ccb *pccb) { int ret; switch (pccb->cmd[0]) { case SCSI_READ16: case SCSI_READ10: ret = ata_scsiop_read_write(pccb, 0); break; case SCSI_WRITE10: ret = ata_scsiop_read_write(pccb, 1); break; case SCSI_RD_CAPAC10: ret = ata_scsiop_read_capacity10(pccb); break; case SCSI_RD_CAPAC16: ret = ata_scsiop_read_capacity16(pccb); break; case SCSI_TST_U_RDY: ret = ata_scsiop_test_unit_ready(pccb); break; case SCSI_INQUIRY: ret = ata_scsiop_inquiry(pccb); break; default: printf("Unsupport SCSI command 0x%02x\n", pccb->cmd[0]); return false; } if (ret) { debug("SCSI command 0x%02x ret errno %d\n", pccb->cmd[0], ret); return false; } return true; } void scsi_low_level_init(int busdevfunc) { int i; u32 linkmap; #ifndef CONFIG_SCSI_AHCI_PLAT ahci_init_one(busdevfunc); #endif linkmap = probe_ent->link_port_map; for (i = 0; i < CONFIG_SYS_SCSI_MAX_SCSI_ID; i++) { if (((linkmap >> i) & 0x01)) { if (ahci_port_start((u8) i)) { printf("Can not start port %d\n", i); continue; } } } } #ifdef CONFIG_SCSI_AHCI_PLAT int ahci_init(void __iomem *base) { int i, rc = 0; u32 linkmap; probe_ent = malloc(sizeof(struct ahci_probe_ent)); if (!probe_ent) { printf("%s: No memory for probe_ent\n", __func__); return -ENOMEM; } memset(probe_ent, 0, sizeof(struct ahci_probe_ent)); probe_ent->host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA | ATA_FLAG_NO_ATAPI; probe_ent->pio_mask = 0x1f; probe_ent->udma_mask = 0x7f; /*Fixme,assume to support UDMA6 */ probe_ent->mmio_base = base; /* initialize adapter */ rc = ahci_host_init(probe_ent); if (rc) goto err_out; ahci_print_info(probe_ent); linkmap = probe_ent->link_port_map; for (i = 0; i < CONFIG_SYS_SCSI_MAX_SCSI_ID; i++) { if (((linkmap >> i) & 0x01)) { if (ahci_port_start((u8) i)) { printf("Can not start port %d\n", i); continue; } } } err_out: return rc; } void __weak scsi_init(void) { } #endif /* * In the general case of generic rotating media it makes sense to have a * flush capability. It probably even makes sense in the case of SSDs because * one cannot always know for sure what kind of internal cache/flush mechanism * is embodied therein. At first it was planned to invoke this after the last * write to disk and before rebooting. In practice, knowing, a priori, which * is the last write is difficult. Because writing to the disk in u-boot is * very rare, this flush command will be invoked after every block write. */ static int ata_io_flush(u8 port) { u8 fis[20]; struct ahci_ioports *pp = &(probe_ent->port[port]); void __iomem *port_mmio = pp->port_mmio; u32 cmd_fis_len = 5; /* five dwords */ /* Preset the FIS */ memset(fis, 0, 20); fis[0] = 0x27; /* Host to device FIS. */ fis[1] = 1 << 7; /* Command FIS. */ fis[2] = ATA_CMD_FLUSH_EXT; memcpy((unsigned char *)pp->cmd_tbl, fis, 20); ahci_fill_cmd_slot(pp, cmd_fis_len); writel_with_flush(1, port_mmio + PORT_CMD_ISSUE); if (waiting_for_cmd_completed(port_mmio + PORT_CMD_ISSUE, WAIT_MS_FLUSH, 0x1)) { debug("scsi_ahci: flush command timeout on port %d.\n", port); return -EIO; } return 0; } __weak void scsi_bus_reset(void) { /*Not implement*/ } void scsi_print_error(ccb * pccb) { /*The ahci error info can be read in the ahci driver*/ }