/* * Copyright (C) Freescale Semiconductor, Inc. 2006. * Author: Jason Jin * Zhang Wei * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA * * with the reference on libata and ahci drvier in kernel * */ #include #include #include #include #include #include #include #include #include #include #include struct ahci_probe_ent *probe_ent = NULL; hd_driveid_t *ataid[AHCI_MAX_PORTS]; #define writel_with_flush(a,b) do { writel(a,b); readl(b); } while (0) static inline u32 ahci_port_base(u32 base, u32 port) { return base + 0x100 + (port * 0x80); } static void ahci_setup_port(struct ahci_ioports *port, unsigned long 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) #define ssleep(a) msleep(a * 1000) static int waiting_for_cmd_completed(volatile u8 *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; } 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 volatile u8 *mmio = (volatile u8 *)probe_ent->mmio_base; u32 tmp, cap_save; int i, j; volatile u8 *port_mmio; cap_save = readl(mmio + HOST_CAP); cap_save &= ((1 << 28) | (1 << 17)); cap_save |= (1 << 27); /* global controller reset */ tmp = readl(mmio + HOST_CTL); if ((tmp & HOST_RESET) == 0) writel_with_flush(tmp | HOST_RESET, mmio + HOST_CTL); /* reset must complete within 1 second, or * the hardware should be considered fried. */ ssleep(1); tmp = readl(mmio + HOST_CTL); if (tmp & HOST_RESET) { debug("controller reset failed (0x%x)\n", tmp); return -1; } 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); 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); for (i = 0; i < probe_ent->n_ports; i++) { probe_ent->port[i].port_mmio = ahci_port_base((u32) mmio, i); port_mmio = (u8 *) probe_ent->port[i].port_mmio; ahci_setup_port(&probe_ent->port[i], (unsigned long)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)) { 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); } writel(PORT_CMD_SPIN_UP, port_mmio + PORT_CMD); j = 0; while (j < 100) { msleep(10); tmp = readl(port_mmio + PORT_SCR_STAT); if ((tmp & 0xf) == 0x3) break; j++; } 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); /* set irq mask (enables interrupts) */ writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK); /*register linkup ports */ tmp = readl(port_mmio + PORT_SCR_STAT); debug("Port %d status: 0x%x\n", i, tmp); if ((tmp & 0xf) == 0x03) 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 volatile u8 *mmio = (volatile u8 *)probe_ent->mmio_base; u32 vers, cap, impl, speed; const char *speed_s; const char *scc_s; vers = readl(mmio + HOST_VERSION); cap = probe_ent->cap; impl = probe_ent->port_map; speed = (cap >> 20) & 0xf; if (speed == 1) speed_s = "1.5"; else if (speed == 2) speed_s = "3"; 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\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 << 15) ? "pio " : "", cap & (1 << 14) ? "slum " : "", cap & (1 << 13) ? "part " : ""); } #ifndef CONFIG_SCSI_AHCI_PLAT static int ahci_init_one(pci_dev_t pdev) { u16 vendor; int rc; memset((void *)ataid, 0, sizeof(hd_driveid_t *) * AHCI_MAX_PORTS); probe_ent = malloc(sizeof(struct ahci_probe_ent)); 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 = (u32)pci_map_bar(pdev, AHCI_PCI_BAR, PCI_REGION_MEM); /* 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((u32) 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(pp->cmd_tbl & 0xffffffff); pp->cmd_slot->tbl_addr_hi = 0; } static void ahci_set_feature(u8 port) { struct ahci_ioports *pp = &(probe_ent->port[port]); volatile u8 *port_mmio = (volatile u8 *)pp->port_mmio; u32 cmd_fis_len = 5; /* five dwords */ u8 fis[20]; /*set feature */ memset(fis, 0, 20); fis[0] = 0x27; fis[1] = 1 << 7; fis[2] = ATA_CMD_SETF; fis[3] = SETFEATURES_XFER; fis[12] = __ilog2(probe_ent->udma_mask + 1) + 0x40 - 0x01; memcpy((unsigned char *)pp->cmd_tbl, fis, 20); ahci_fill_cmd_slot(pp, cmd_fis_len); writel(1, port_mmio + PORT_CMD_ISSUE); readl(port_mmio + PORT_CMD_ISSUE); if (waiting_for_cmd_completed(port_mmio + PORT_CMD_ISSUE, 150, 0x1)) { printf("set feature error!\n"); } } static int ahci_port_start(u8 port) { struct ahci_ioports *pp = &(probe_ent->port[port]); volatile u8 *port_mmio = (volatile u8 *)pp->port_mmio; u32 port_status; u32 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 = (u32) malloc(AHCI_PORT_PRIV_DMA_SZ + 2048); if (!mem) { free(pp); printf("No mem for table!\n"); return -ENOMEM; } mem = (mem + 0x800) & (~0x7ff); /* Aligned to 2048-bytes */ memset((u8 *) 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 *)mem; debug("cmd_slot = %p\n", pp->cmd_slot); mem += (AHCI_CMD_SLOT_SZ + 224); /* * Second item: Received-FIS area */ pp->rx_fis = mem; mem += AHCI_RX_FIS_SZ; /* * Third item: data area for storing a single command * and its scatter-gather table */ pp->cmd_tbl = mem; debug("cmd_tbl_dma = 0x%x\n", pp->cmd_tbl); mem += AHCI_CMD_TBL_HDR; pp->cmd_tbl_sg = (struct ahci_sg *)mem; writel_with_flush((u32) pp->cmd_slot, port_mmio + PORT_LST_ADDR); writel_with_flush(pp->rx_fis, port_mmio + PORT_FIS_ADDR); 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); return 0; } static int get_ahci_device_data(u8 port, u8 *fis, int fis_len, u8 *buf, int buf_len) { struct ahci_ioports *pp = &(probe_ent->port[port]); volatile u8 *port_mmio = (volatile u8 *)pp->port_mmio; u32 opts; u32 port_status; int sg_count; debug("Enter get_ahci_device_data: for port %d\n", port); if (port > probe_ent->n_ports) { printf("Invaild 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); ahci_fill_cmd_slot(pp, opts); writel_with_flush(1, port_mmio + PORT_CMD_ISSUE); if (waiting_for_cmd_completed(port_mmio + PORT_CMD_ISSUE, 150, 0x1)) { printf("timeout exit!\n"); return -1; } debug("get_ahci_device_data: %d byte transferred.\n", 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; } static void dump_ataid(hd_driveid_t *ataid) { debug("(49)ataid->capability = 0x%x\n", ataid->capability); debug("(53)ataid->field_valid =0x%x\n", ataid->field_valid); debug("(63)ataid->dma_mword = 0x%x\n", ataid->dma_mword); debug("(64)ataid->eide_pio_modes = 0x%x\n", ataid->eide_pio_modes); debug("(75)ataid->queue_depth = 0x%x\n", ataid->queue_depth); debug("(80)ataid->major_rev_num = 0x%x\n", ataid->major_rev_num); debug("(81)ataid->minor_rev_num = 0x%x\n", ataid->minor_rev_num); debug("(82)ataid->command_set_1 = 0x%x\n", ataid->command_set_1); debug("(83)ataid->command_set_2 = 0x%x\n", ataid->command_set_2); debug("(84)ataid->cfsse = 0x%x\n", ataid->cfsse); debug("(85)ataid->cfs_enable_1 = 0x%x\n", ataid->cfs_enable_1); debug("(86)ataid->cfs_enable_2 = 0x%x\n", ataid->cfs_enable_2); debug("(87)ataid->csf_default = 0x%x\n", ataid->csf_default); debug("(88)ataid->dma_ultra = 0x%x\n", ataid->dma_ultra); debug("(93)ataid->hw_config = 0x%x\n", ataid->hw_config); } /* * SCSI INQUIRY command operation. */ static int ata_scsiop_inquiry(ccb *pccb) { u8 hdr[] = { 0, 0, 0x5, /* claim SPC-3 version compatibility */ 2, 95 - 4, }; u8 fis[20]; u8 *tmpid; 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, 20); /* Construct the FIS */ fis[0] = 0x27; /* Host to device FIS. */ fis[1] = 1 << 7; /* Command FIS. */ fis[2] = ATA_CMD_IDENT; /* Command byte. */ /* Read id from sata */ port = pccb->target; if (!(tmpid = malloc(sizeof(hd_driveid_t)))) return -ENOMEM; if (get_ahci_device_data(port, (u8 *) & fis, 20, tmpid, sizeof(hd_driveid_t))) { debug("scsi_ahci: SCSI inquiry command failure.\n"); return -EIO; } if (ataid[port]) free(ataid[port]); ataid[port] = (hd_driveid_t *) tmpid; memcpy(&pccb->pdata[8], "ATA ", 8); ata_id_strcpy((u16 *) &pccb->pdata[16], (u16 *)ataid[port]->model, 16); ata_id_strcpy((u16 *) &pccb->pdata[32], (u16 *)ataid[port]->fw_rev, 4); dump_ataid(ataid[port]); return 0; } /* * SCSI READ10 command operation. */ static int ata_scsiop_read10(ccb * pccb) { u32 len = 0; u8 fis[20]; len = (((u32) pccb->cmd[7]) << 8) | ((u32) pccb->cmd[8]); /* 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 (!len) return 0; memset(fis, 0, 20); /* Construct the FIS */ fis[0] = 0x27; /* Host to device FIS. */ fis[1] = 1 << 7; /* Command FIS. */ fis[2] = ATA_CMD_RD_DMA; /* Command byte. */ /* LBA address, only support LBA28 in this driver */ fis[4] = pccb->cmd[5]; fis[5] = pccb->cmd[4]; fis[6] = pccb->cmd[3]; fis[7] = (pccb->cmd[2] & 0x0f) | 0xe0; /* Sector Count */ fis[12] = pccb->cmd[8]; fis[13] = pccb->cmd[7]; /* Read from ahci */ if (get_ahci_device_data(pccb->target, (u8 *) & fis, 20, pccb->pdata, pccb->datalen)) { debug("scsi_ahci: SCSI READ10 command failure.\n"); return -EIO; } return 0; } /* * SCSI READ CAPACITY10 command operation. */ static int ata_scsiop_read_capacity10(ccb *pccb) { u32 cap; if (!ataid[pccb->target]) { printf("scsi_ahci: SCSI READ CAPACITY10 command failure. " "\tNo ATA info!\n" "\tPlease run SCSI commmand INQUIRY firstly!\n"); return -EPERM; } cap = le32_to_cpu(ataid[pccb->target]->lba_capacity); memcpy(pccb->pdata, &cap, sizeof(cap)); pccb->pdata[4] = pccb->pdata[5] = 0; pccb->pdata[6] = 512 >> 8; pccb->pdata[7] = 512 & 0xff; 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_READ10: ret = ata_scsiop_read10(pccb); break; case SCSI_RD_CAPAC: ret = ata_scsiop_read_capacity10(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; } ahci_set_feature((u8) i); } } } #ifdef CONFIG_SCSI_AHCI_PLAT int ahci_init(u32 base) { int i, rc = 0; u32 linkmap; memset(ataid, 0, sizeof(ataid)); probe_ent = malloc(sizeof(struct ahci_probe_ent)); 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; } ahci_set_feature((u8) i); } } err_out: return rc; } #endif void scsi_bus_reset(void) { /*Not implement*/ } void scsi_print_error(ccb * pccb) { /*The ahci error info can be read in the ahci driver*/ }