diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/Makefile | 2 | ||||
| -rw-r--r-- | drivers/ahci.c | 706 |
2 files changed, 707 insertions, 1 deletions
diff --git a/drivers/Makefile b/drivers/Makefile index 9be95c7..25e1622 100644 --- a/drivers/Makefile +++ b/drivers/Makefile @@ -44,7 +44,7 @@ OBJS = 3c589.o 5701rls.o ali512x.o \ serial.o serial_max3100.o \ serial_pl010.o serial_pl011.o serial_xuartlite.o \ sl811_usb.o sm501.o smc91111.o smiLynxEM.o \ - status_led.o sym53c8xx.o \ + status_led.o sym53c8xx.o ahci.o \ ti_pci1410a.o tigon3.o tsec.o \ usbdcore.o usbdcore_ep0.o usbdcore_omap1510.o usbtty.o \ videomodes.o w83c553f.o \ diff --git a/drivers/ahci.c b/drivers/ahci.c new file mode 100644 index 0000000..828498d --- /dev/null +++ b/drivers/ahci.c @@ -0,0 +1,706 @@ +/* + * Copyright (C) Freescale Semiconductor, Inc. 2006. All rights reserved. + * Author: Jason Jin<Jason.jin@freescale.com> + * Zhang Wei<wei.zhang@freescale.com> + * + * 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 <common.h> + +#ifdef CONFIG_SCSI_AHCI + +#include <command.h> +#include <pci.h> +#include <asm/processor.h> +#include <asm/errno.h> +#include <asm/io.h> +#include <malloc.h> +#include <scsi.h> +#include <ata.h> +#include <linux/ctype.h> +#include <ahci.h> + +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) +{ + pci_dev_t pdev = probe_ent->dev; + volatile u8 *mmio = (volatile u8 *)probe_ent->mmio_base; + u32 tmp, cap_save; + u16 tmp16; + int i, j; + volatile u8* port_mmio; + unsigned short vendor; + + 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); + + 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); + } + + 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); + + pci_read_config_word(pdev, PCI_COMMAND, &tmp16); + tmp |= PCI_COMMAND_MASTER; + pci_write_config_word(pdev, PCI_COMMAND, tmp16); + + return 0; +} + + +static void ahci_print_info(struct ahci_probe_ent *probe_ent) +{ + pci_dev_t pdev = probe_ent->dev; + volatile u8* mmio = (volatile u8 *)probe_ent->mmio_base; + u32 vers, cap, impl, speed; + const char *speed_s; + u16 cc; + 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 = "?"; + + 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"; + + 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 " : "" + ); +} + + +static int ahci_init_one (pci_dev_t pdev) +{ + u32 iobase, vendor; + int rc; + + memset((void *)ataid, 0, sizeof(hd_driveid_t *) * AHCI_MAX_PORTS); + + probe_ent = malloc(sizeof(probe_ent)); + memset(probe_ent, 0, sizeof(probe_ent)); + probe_ent->dev = pdev; + + pci_read_config_dword(pdev, AHCI_PCI_BAR, &iobase); + iobase &= ~0xf; + + 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 = iobase; + + /* 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; +} + + +#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 = 0x%x\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] = le16_to_cpu(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) +{ + u64 lba = 0; + u32 len = 0; + u8 fis[20]; + + lba = (((u64)pccb->cmd[2]) << 24) | (((u64)pccb->cmd[3]) << 16) + | (((u64)pccb->cmd[4]) << 8) | ((u64)pccb->cmd[5]); + 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) +{ + u8 buf[8]; + + 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; + } + + memset(buf, 0, 8); + + *(u32 *)buf = le32_to_cpu(ataid[pccb->target]->lba_capacity); + + buf[6] = 512 >> 8; + buf[7] = 512 & 0xff; + + memcpy(pccb->pdata, buf, 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_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; + + ahci_init_one(busdevfunc); + + linkmap = probe_ent->link_port_map; + + for(i = 0; i < CFG_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); + } + } +} + + +void scsi_bus_reset(void) +{ +/*Not implement*/ +} + + +void scsi_print_error(ccb *pccb) +{ +/*The ahci error info can be read in the ahci driver*/ +} +#endif |