| // Low level ATA disk access |
| // |
| // Copyright (C) 2008,2009 Kevin O'Connor <kevin@koconnor.net> |
| // Copyright (C) 2002 MandrakeSoft S.A. |
| // |
| // This file may be distributed under the terms of the GNU LGPLv3 license. |
| |
| #include "types.h" // u8 |
| #include "ioport.h" // inb |
| #include "util.h" // dprintf |
| #include "cmos.h" // inb_cmos |
| #include "pic.h" // enable_hwirq |
| #include "biosvar.h" // GET_EBDA |
| #include "pci.h" // foreachpci |
| #include "pci_ids.h" // PCI_CLASS_STORAGE_OTHER |
| #include "pci_regs.h" // PCI_INTERRUPT_LINE |
| #include "boot.h" // add_bcv_hd |
| #include "disk.h" // struct ata_s |
| #include "ata.h" // ATA_CB_STAT |
| |
| #define IDE_TIMEOUT 32000 //32 seconds max for IDE ops |
| |
| struct ata_channel_s ATA_channels[CONFIG_MAX_ATA_INTERFACES] VAR16VISIBLE; |
| |
| |
| /**************************************************************** |
| * Helper functions |
| ****************************************************************/ |
| |
| // Wait for the specified ide state |
| static inline int |
| await_ide(u8 mask, u8 flags, u16 base, u16 timeout) |
| { |
| u64 end = calc_future_tsc(timeout); |
| for (;;) { |
| u8 status = inb(base+ATA_CB_STAT); |
| if ((status & mask) == flags) |
| return status; |
| if (rdtscll() > end) { |
| dprintf(1, "IDE time out\n"); |
| return -1; |
| } |
| } |
| } |
| |
| // Wait for the device to be not-busy. |
| static int |
| await_not_bsy(u16 base) |
| { |
| return await_ide(ATA_CB_STAT_BSY, 0, base, IDE_TIMEOUT); |
| } |
| |
| // Wait for the device to be ready. |
| static int |
| await_rdy(u16 base) |
| { |
| return await_ide(ATA_CB_STAT_RDY, ATA_CB_STAT_RDY, base, IDE_TIMEOUT); |
| } |
| |
| // Wait for ide state - pauses for one ata cycle first. |
| static inline int |
| pause_await_not_bsy(u16 iobase1, u16 iobase2) |
| { |
| // Wait one PIO transfer cycle. |
| inb(iobase2 + ATA_CB_ASTAT); |
| |
| return await_not_bsy(iobase1); |
| } |
| |
| // Wait for ide state - pause for 400ns first. |
| static inline int |
| ndelay_await_not_bsy(u16 iobase1) |
| { |
| ndelay(400); |
| return await_not_bsy(iobase1); |
| } |
| |
| // Reset a drive |
| static void |
| ata_reset(int driveid) |
| { |
| u8 ataid = GET_GLOBAL(Drives.drives[driveid].cntl_id); |
| u8 channel = ataid / 2; |
| u8 slave = ataid % 2; |
| u16 iobase1 = GET_GLOBAL(ATA_channels[channel].iobase1); |
| u16 iobase2 = GET_GLOBAL(ATA_channels[channel].iobase2); |
| |
| dprintf(6, "ata_reset driveid=%d\n", driveid); |
| // Pulse SRST |
| outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN | ATA_CB_DC_SRST, iobase2+ATA_CB_DC); |
| udelay(5); |
| outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2+ATA_CB_DC); |
| mdelay(2); |
| |
| // wait for device to become not busy. |
| int status = await_not_bsy(iobase1); |
| if (status < 0) |
| goto done; |
| if (slave) { |
| // Change device. |
| u64 end = calc_future_tsc(IDE_TIMEOUT); |
| for (;;) { |
| outb(ATA_CB_DH_DEV1, iobase1 + ATA_CB_DH); |
| status = ndelay_await_not_bsy(iobase1); |
| if (status < 0) |
| goto done; |
| if (inb(iobase1 + ATA_CB_DH) == ATA_CB_DH_DEV1) |
| break; |
| // Change drive request failed to take effect - retry. |
| if (rdtscll() > end) { |
| dprintf(1, "ata_reset slave time out\n"); |
| goto done; |
| } |
| } |
| } else { |
| // QEMU doesn't reset dh on reset, so set it explicitly. |
| outb(ATA_CB_DH_DEV0, iobase1 + ATA_CB_DH); |
| } |
| |
| // On a user-reset request, wait for RDY if it is an ATA device. |
| u8 type=GET_GLOBAL(Drives.drives[driveid].type); |
| if (type == DTYPE_ATA) |
| status = await_rdy(iobase1); |
| |
| done: |
| // Enable interrupts |
| outb(ATA_CB_DC_HD15, iobase2+ATA_CB_DC); |
| |
| dprintf(6, "ata_reset exit status=%x\n", status); |
| } |
| |
| static int |
| isready(int driveid) |
| { |
| // Read the status from controller |
| u8 ataid = GET_GLOBAL(Drives.drives[driveid].cntl_id); |
| u8 channel = ataid / 2; |
| u16 iobase1 = GET_GLOBAL(ATA_channels[channel].iobase1); |
| u8 status = inb(iobase1 + ATA_CB_STAT); |
| if ((status & (ATA_CB_STAT_BSY|ATA_CB_STAT_RDY)) == ATA_CB_STAT_RDY) |
| return DISK_RET_SUCCESS; |
| return DISK_RET_ENOTREADY; |
| } |
| |
| static int |
| process_ata_misc_op(struct disk_op_s *op) |
| { |
| if (!CONFIG_ATA) |
| return 0; |
| |
| switch (op->command) { |
| case CMD_RESET: |
| ata_reset(op->driveid); |
| return DISK_RET_SUCCESS; |
| case CMD_ISREADY: |
| return isready(op->driveid); |
| case CMD_FORMAT: |
| case CMD_VERIFY: |
| case CMD_SEEK: |
| return DISK_RET_SUCCESS; |
| default: |
| op->count = 0; |
| return DISK_RET_EPARAM; |
| } |
| } |
| |
| |
| /**************************************************************** |
| * ATA send command |
| ****************************************************************/ |
| |
| struct ata_pio_command { |
| u8 feature; |
| u8 sector_count; |
| u8 lba_low; |
| u8 lba_mid; |
| u8 lba_high; |
| u8 device; |
| u8 command; |
| |
| u8 sector_count2; |
| u8 lba_low2; |
| u8 lba_mid2; |
| u8 lba_high2; |
| }; |
| |
| // Send an ata command to the drive. |
| static int |
| send_cmd(int driveid, struct ata_pio_command *cmd) |
| { |
| u8 ataid = GET_GLOBAL(Drives.drives[driveid].cntl_id); |
| u8 channel = ataid / 2; |
| u8 slave = ataid % 2; |
| u16 iobase1 = GET_GLOBAL(ATA_channels[channel].iobase1); |
| u16 iobase2 = GET_GLOBAL(ATA_channels[channel].iobase2); |
| |
| // Disable interrupts |
| outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2 + ATA_CB_DC); |
| |
| // Select device |
| int status = await_not_bsy(iobase1); |
| if (status < 0) |
| return status; |
| u8 newdh = ((cmd->device & ~ATA_CB_DH_DEV1) |
| | (slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0)); |
| u8 olddh = inb(iobase1 + ATA_CB_DH); |
| outb(newdh, iobase1 + ATA_CB_DH); |
| if ((olddh ^ newdh) & (1<<4)) { |
| // Was a device change - wait for device to become not busy. |
| status = ndelay_await_not_bsy(iobase1); |
| if (status < 0) |
| return status; |
| } |
| |
| if (cmd->command & 0x04) { |
| outb(0x00, iobase1 + ATA_CB_FR); |
| outb(cmd->sector_count2, iobase1 + ATA_CB_SC); |
| outb(cmd->lba_low2, iobase1 + ATA_CB_SN); |
| outb(cmd->lba_mid2, iobase1 + ATA_CB_CL); |
| outb(cmd->lba_high2, iobase1 + ATA_CB_CH); |
| } |
| outb(cmd->feature, iobase1 + ATA_CB_FR); |
| outb(cmd->sector_count, iobase1 + ATA_CB_SC); |
| outb(cmd->lba_low, iobase1 + ATA_CB_SN); |
| outb(cmd->lba_mid, iobase1 + ATA_CB_CL); |
| outb(cmd->lba_high, iobase1 + ATA_CB_CH); |
| outb(cmd->command, iobase1 + ATA_CB_CMD); |
| |
| status = ndelay_await_not_bsy(iobase1); |
| if (status < 0) |
| return status; |
| |
| if (status & ATA_CB_STAT_ERR) { |
| dprintf(6, "send_cmd : read error (status=%02x err=%02x)\n" |
| , status, inb(iobase1 + ATA_CB_ERR)); |
| return -4; |
| } |
| if (!(status & ATA_CB_STAT_DRQ)) { |
| dprintf(6, "send_cmd : DRQ not set (status %02x)\n", status); |
| return -5; |
| } |
| |
| return 0; |
| } |
| |
| |
| /**************************************************************** |
| * ATA transfers |
| ****************************************************************/ |
| |
| // Transfer 'op->count' blocks (of 'blocksize' bytes) to/from drive |
| // 'op->driveid'. |
| static int |
| ata_transfer(struct disk_op_s *op, int iswrite, int blocksize) |
| { |
| dprintf(16, "ata_transfer id=%d write=%d count=%d bs=%d buf=%p\n" |
| , op->driveid, iswrite, op->count, blocksize, op->buf_fl); |
| |
| u8 ataid = GET_GLOBAL(Drives.drives[op->driveid].cntl_id); |
| u8 channel = ataid / 2; |
| u16 iobase1 = GET_GLOBAL(ATA_channels[channel].iobase1); |
| u16 iobase2 = GET_GLOBAL(ATA_channels[channel].iobase2); |
| int count = op->count; |
| void *buf_fl = op->buf_fl; |
| int status; |
| for (;;) { |
| if (iswrite) { |
| // Write data to controller |
| dprintf(16, "Write sector id=%d dest=%p\n", op->driveid, buf_fl); |
| if (CONFIG_ATA_PIO32) |
| outsl_fl(iobase1, buf_fl, blocksize / 4); |
| else |
| outsw_fl(iobase1, buf_fl, blocksize / 2); |
| } else { |
| // Read data from controller |
| dprintf(16, "Read sector id=%d dest=%p\n", op->driveid, buf_fl); |
| if (CONFIG_ATA_PIO32) |
| insl_fl(iobase1, buf_fl, blocksize / 4); |
| else |
| insw_fl(iobase1, buf_fl, blocksize / 2); |
| } |
| buf_fl += blocksize; |
| |
| status = pause_await_not_bsy(iobase1, iobase2); |
| if (status < 0) { |
| // Error |
| op->count -= count; |
| return status; |
| } |
| |
| count--; |
| if (!count) |
| break; |
| status &= (ATA_CB_STAT_BSY | ATA_CB_STAT_DRQ | ATA_CB_STAT_ERR); |
| if (status != ATA_CB_STAT_DRQ) { |
| dprintf(6, "ata_transfer : more sectors left (status %02x)\n" |
| , status); |
| op->count -= count; |
| return -6; |
| } |
| } |
| |
| status &= (ATA_CB_STAT_BSY | ATA_CB_STAT_DF | ATA_CB_STAT_DRQ |
| | ATA_CB_STAT_ERR); |
| if (!iswrite) |
| status &= ~ATA_CB_STAT_DF; |
| if (status != 0) { |
| dprintf(6, "ata_transfer : no sectors left (status %02x)\n", status); |
| return -7; |
| } |
| |
| // Enable interrupts |
| outb(ATA_CB_DC_HD15, iobase2+ATA_CB_DC); |
| return 0; |
| } |
| |
| |
| /**************************************************************** |
| * ATA hard drive functions |
| ****************************************************************/ |
| |
| // Read/write count blocks from a harddrive. |
| static int |
| ata_cmd_data(struct disk_op_s *op, int iswrite, int command) |
| { |
| u64 lba = op->lba; |
| |
| struct ata_pio_command cmd; |
| memset(&cmd, 0, sizeof(cmd)); |
| |
| cmd.command = command; |
| if (op->count >= (1<<8) || lba + op->count >= (1<<28)) { |
| cmd.sector_count2 = op->count >> 8; |
| cmd.lba_low2 = lba >> 24; |
| cmd.lba_mid2 = lba >> 32; |
| cmd.lba_high2 = lba >> 40; |
| |
| cmd.command |= 0x04; |
| lba &= 0xffffff; |
| } |
| |
| cmd.feature = 0; |
| cmd.sector_count = op->count; |
| cmd.lba_low = lba; |
| cmd.lba_mid = lba >> 8; |
| cmd.lba_high = lba >> 16; |
| cmd.device = ((lba >> 24) & 0xf) | ATA_CB_DH_LBA; |
| |
| int ret = send_cmd(op->driveid, &cmd); |
| if (ret) |
| return ret; |
| return ata_transfer(op, iswrite, DISK_SECTOR_SIZE); |
| } |
| |
| int |
| process_ata_op(struct disk_op_s *op) |
| { |
| if (!CONFIG_ATA) |
| return 0; |
| |
| int ret; |
| switch (op->command) { |
| case CMD_READ: |
| ret = ata_cmd_data(op, 0, ATA_CMD_READ_SECTORS); |
| break; |
| case CMD_WRITE: |
| ret = ata_cmd_data(op, 1, ATA_CMD_WRITE_SECTORS); |
| break; |
| default: |
| return process_ata_misc_op(op); |
| } |
| if (ret) |
| return DISK_RET_EBADTRACK; |
| return DISK_RET_SUCCESS; |
| } |
| |
| |
| /**************************************************************** |
| * ATAPI functions |
| ****************************************************************/ |
| |
| // Low-level atapi command transmit function. |
| static int |
| send_atapi_cmd(int driveid, u8 *cmdbuf, u8 cmdlen, u16 blocksize) |
| { |
| u8 ataid = GET_GLOBAL(Drives.drives[driveid].cntl_id); |
| u8 channel = ataid / 2; |
| u16 iobase1 = GET_GLOBAL(ATA_channels[channel].iobase1); |
| u16 iobase2 = GET_GLOBAL(ATA_channels[channel].iobase2); |
| |
| struct ata_pio_command cmd; |
| cmd.sector_count = 0; |
| cmd.feature = 0; |
| cmd.lba_low = 0; |
| cmd.lba_mid = blocksize; |
| cmd.lba_high = blocksize >> 8; |
| cmd.device = 0; |
| cmd.command = ATA_CMD_PACKET; |
| |
| int ret = send_cmd(driveid, &cmd); |
| if (ret) |
| return ret; |
| |
| // Send command to device |
| outsw_fl(iobase1, MAKE_FLATPTR(GET_SEG(SS), cmdbuf), cmdlen / 2); |
| |
| int status = pause_await_not_bsy(iobase1, iobase2); |
| if (status < 0) |
| return status; |
| |
| if (status & ATA_CB_STAT_ERR) { |
| u8 err = inb(iobase1 + ATA_CB_ERR); |
| // skip "Not Ready" |
| if (err != 0x20) |
| dprintf(6, "send_atapi_cmd : read error (status=%02x err=%02x)\n" |
| , status, err); |
| return -2; |
| } |
| if (!(status & ATA_CB_STAT_DRQ)) { |
| dprintf(6, "send_atapi_cmd : DRQ not set (status %02x)\n", status); |
| return -3; |
| } |
| |
| return 0; |
| } |
| |
| // Read sectors from the cdrom. |
| int |
| cdrom_read(struct disk_op_s *op) |
| { |
| u8 atacmd[12]; |
| memset(atacmd, 0, sizeof(atacmd)); |
| atacmd[0]=0x28; // READ command |
| atacmd[7]=(op->count & 0xff00) >> 8; // Sectors |
| atacmd[8]=(op->count & 0x00ff); |
| atacmd[2]=(op->lba & 0xff000000) >> 24; // LBA |
| atacmd[3]=(op->lba & 0x00ff0000) >> 16; |
| atacmd[4]=(op->lba & 0x0000ff00) >> 8; |
| atacmd[5]=(op->lba & 0x000000ff); |
| |
| int ret = send_atapi_cmd(op->driveid, atacmd, sizeof(atacmd) |
| , CDROM_SECTOR_SIZE); |
| if (ret) |
| return ret; |
| |
| return ata_transfer(op, 0, CDROM_SECTOR_SIZE); |
| } |
| |
| int |
| process_atapi_op(struct disk_op_s *op) |
| { |
| int ret; |
| switch (op->command) { |
| case CMD_READ: |
| ret = cdrom_read(op); |
| break; |
| case CMD_FORMAT: |
| case CMD_WRITE: |
| return DISK_RET_EWRITEPROTECT; |
| default: |
| return process_ata_misc_op(op); |
| } |
| if (ret) |
| return DISK_RET_EBADTRACK; |
| return DISK_RET_SUCCESS; |
| } |
| |
| // Send a simple atapi command to a drive. |
| int |
| ata_cmd_packet(int driveid, u8 *cmdbuf, u8 cmdlen |
| , u32 length, void *buf_fl) |
| { |
| int ret = send_atapi_cmd(driveid, cmdbuf, cmdlen, length); |
| if (ret) |
| return ret; |
| |
| struct disk_op_s dop; |
| memset(&dop, 0, sizeof(dop)); |
| dop.driveid = driveid; |
| dop.count = 1; |
| dop.buf_fl = buf_fl; |
| |
| return ata_transfer(&dop, 0, length); |
| } |
| |
| |
| /**************************************************************** |
| * ATA detect and init |
| ****************************************************************/ |
| |
| // Extract the ATA/ATAPI version info. |
| static int |
| extract_version(u16 *buffer) |
| { |
| // Extract ATA/ATAPI version. |
| u16 ataversion = buffer[80]; |
| u8 version; |
| for (version=15; version>0; version--) |
| if (ataversion & (1<<version)) |
| break; |
| return version; |
| } |
| |
| // Extract common information from IDENTIFY commands. |
| static void |
| extract_identify(int driveid, u16 *buffer) |
| { |
| dprintf(3, "Identify w0=%x w2=%x\n", buffer[0], buffer[2]); |
| |
| // Read model name |
| char *model = Drives.drives[driveid].model; |
| int maxsize = ARRAY_SIZE(Drives.drives[driveid].model); |
| int i; |
| for (i=0; i<maxsize/2; i++) { |
| u16 v = buffer[27+i]; |
| model[i*2] = v >> 8; |
| model[i*2+1] = v & 0xff; |
| } |
| model[maxsize-1] = 0x00; |
| |
| // Trim trailing spaces from model name. |
| for (i=maxsize-2; i>0 && model[i] == 0x20; i--) |
| model[i] = 0x00; |
| |
| // Common flags. |
| SET_GLOBAL(Drives.drives[driveid].removable, (buffer[0] & 0x80) ? 1 : 0); |
| SET_GLOBAL(Drives.drives[driveid].cntl_info, extract_version(buffer)); |
| } |
| |
| void |
| describe_atapi(int driveid) |
| { |
| u8 ataid = Drives.drives[driveid].cntl_id; |
| u8 channel = ataid / 2; |
| u8 slave = ataid % 2; |
| u8 version = Drives.drives[driveid].cntl_info; |
| int iscd = Drives.drives[driveid].floppy_type; |
| printf("ata%d-%d: %s ATAPI-%d %s", channel, slave |
| , Drives.drives[driveid].model, version |
| , (iscd ? "CD-Rom/DVD-Rom" : "Device")); |
| } |
| |
| static int |
| init_drive_atapi(int driveid, u16 *buffer) |
| { |
| // Send an IDENTIFY_DEVICE_PACKET command to device |
| memset(buffer, 0, DISK_SECTOR_SIZE); |
| struct disk_op_s dop; |
| memset(&dop, 0, sizeof(dop)); |
| dop.driveid = driveid; |
| dop.count = 1; |
| dop.lba = 1; |
| dop.buf_fl = MAKE_FLATPTR(GET_SEG(SS), buffer); |
| int ret = ata_cmd_data(&dop, 0, ATA_CMD_IDENTIFY_DEVICE_PACKET); |
| if (ret) |
| return ret; |
| |
| // Success - setup as ATAPI. |
| extract_identify(driveid, buffer); |
| SET_GLOBAL(Drives.drives[driveid].type, DTYPE_ATAPI); |
| SET_GLOBAL(Drives.drives[driveid].blksize, CDROM_SECTOR_SIZE); |
| SET_GLOBAL(Drives.drives[driveid].sectors, (u64)-1); |
| u8 iscd = ((buffer[0] >> 8) & 0x1f) == 0x05; |
| SET_GLOBAL(Drives.drives[driveid].floppy_type, iscd); |
| |
| // fill cdidmap |
| if (iscd) |
| map_cd_drive(driveid); |
| |
| return 0; |
| } |
| |
| void |
| describe_ata(int driveid) |
| { |
| u8 ataid = Drives.drives[driveid].cntl_id; |
| u8 channel = ataid / 2; |
| u8 slave = ataid % 2; |
| u64 sectors = Drives.drives[driveid].sectors; |
| u8 version = Drives.drives[driveid].cntl_info; |
| char *model = Drives.drives[driveid].model; |
| printf("ata%d-%d: %s ATA-%d Hard-Disk", channel, slave, model, version); |
| u64 sizeinmb = sectors >> 11; |
| if (sizeinmb < (1 << 16)) |
| printf(" (%u MiBytes)", (u32)sizeinmb); |
| else |
| printf(" (%u GiBytes)", (u32)(sizeinmb >> 10)); |
| } |
| |
| static int |
| init_drive_ata(int driveid, u16 *buffer) |
| { |
| // Send an IDENTIFY_DEVICE command to device |
| memset(buffer, 0, DISK_SECTOR_SIZE); |
| struct disk_op_s dop; |
| memset(&dop, 0, sizeof(dop)); |
| dop.driveid = driveid; |
| dop.count = 1; |
| dop.lba = 1; |
| dop.buf_fl = MAKE_FLATPTR(GET_SEG(SS), buffer); |
| int ret = ata_cmd_data(&dop, 0, ATA_CMD_IDENTIFY_DEVICE); |
| if (ret) |
| return ret; |
| |
| // Success - setup as ATA. |
| extract_identify(driveid, buffer); |
| SET_GLOBAL(Drives.drives[driveid].type, DTYPE_ATA); |
| SET_GLOBAL(Drives.drives[driveid].blksize, DISK_SECTOR_SIZE); |
| |
| SET_GLOBAL(Drives.drives[driveid].pchs.cylinders, buffer[1]); |
| SET_GLOBAL(Drives.drives[driveid].pchs.heads, buffer[3]); |
| SET_GLOBAL(Drives.drives[driveid].pchs.spt, buffer[6]); |
| |
| u64 sectors; |
| if (buffer[83] & (1 << 10)) // word 83 - lba48 support |
| sectors = *(u64*)&buffer[100]; // word 100-103 |
| else |
| sectors = *(u32*)&buffer[60]; // word 60 and word 61 |
| SET_GLOBAL(Drives.drives[driveid].sectors, sectors); |
| |
| // Setup disk geometry translation. |
| setup_translation(driveid); |
| |
| // Register with bcv system. |
| add_bcv_internal(driveid); |
| |
| return 0; |
| } |
| |
| static int |
| powerup_await_non_bsy(u16 base, u64 end) |
| { |
| u8 orstatus = 0; |
| u8 status; |
| for (;;) { |
| status = inb(base+ATA_CB_STAT); |
| if (!(status & ATA_CB_STAT_BSY)) |
| break; |
| orstatus |= status; |
| if (orstatus == 0xff) { |
| dprintf(1, "powerup IDE floating\n"); |
| return orstatus; |
| } |
| if (rdtscll() > end) { |
| dprintf(1, "powerup IDE time out\n"); |
| return -1; |
| } |
| } |
| dprintf(6, "powerup iobase=%x st=%x\n", base, status); |
| return status; |
| } |
| |
| static void |
| ata_detect() |
| { |
| // Device detection |
| u64 end = calc_future_tsc(IDE_TIMEOUT); |
| int ataid, last_reset_ataid=-1; |
| for (ataid=0; ataid<CONFIG_MAX_ATA_INTERFACES*2; ataid++) { |
| u8 channel = ataid / 2; |
| u8 slave = ataid % 2; |
| |
| u16 iobase1 = GET_GLOBAL(ATA_channels[channel].iobase1); |
| if (!iobase1) |
| break; |
| |
| // Wait for not-bsy. |
| int status = powerup_await_non_bsy(iobase1, end); |
| if (status < 0) |
| continue; |
| u8 newdh = slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0; |
| outb(newdh, iobase1+ATA_CB_DH); |
| ndelay(400); |
| status = powerup_await_non_bsy(iobase1, end); |
| if (status < 0) |
| continue; |
| |
| // Check if ioport registers look valid. |
| outb(newdh, iobase1+ATA_CB_DH); |
| u8 dh = inb(iobase1+ATA_CB_DH); |
| outb(0x55, iobase1+ATA_CB_SC); |
| outb(0xaa, iobase1+ATA_CB_SN); |
| u8 sc = inb(iobase1+ATA_CB_SC); |
| u8 sn = inb(iobase1+ATA_CB_SN); |
| dprintf(6, "ata_detect ataid=%d sc=%x sn=%x dh=%x\n" |
| , ataid, sc, sn, dh); |
| if (sc != 0x55 || sn != 0xaa || dh != newdh) |
| continue; |
| |
| // Prepare new driveid. |
| u8 driveid = GET_GLOBAL(Drives.drivecount); |
| if (driveid >= ARRAY_SIZE(Drives.drives)) |
| break; |
| memset(&Drives.drives[driveid], 0, sizeof(Drives.drives[0])); |
| Drives.drives[driveid].cntl_id = ataid; |
| |
| // reset the channel |
| if (slave && ataid == last_reset_ataid + 1) { |
| // The drive was just reset - no need to reset it again. |
| } else { |
| ata_reset(driveid); |
| last_reset_ataid = ataid; |
| } |
| |
| // check for ATAPI |
| u16 buffer[256]; |
| int ret = init_drive_atapi(driveid, buffer); |
| if (ret) { |
| // Didn't find an ATAPI drive - look for ATA drive. |
| u8 st = inb(iobase1+ATA_CB_STAT); |
| if (!st) |
| // Status not set - can't be a valid drive. |
| continue; |
| |
| // Wait for RDY. |
| ret = await_rdy(iobase1); |
| if (ret < 0) |
| continue; |
| |
| // check for ATA. |
| ret = init_drive_ata(driveid, buffer); |
| if (ret) |
| // No ATA drive found |
| continue; |
| } |
| SET_GLOBAL(Drives.drivecount, driveid+1); |
| |
| // Report drive info to user. |
| describe_drive(driveid); |
| printf("\n"); |
| |
| u16 resetresult = buffer[93]; |
| dprintf(6, "ata_detect resetresult=%04x\n", resetresult); |
| if (!slave && (resetresult & 0xdf61) == 0x4041) |
| // resetresult looks valid and device 0 is responding to |
| // device 1 requests - device 1 must not be present - skip |
| // detection. |
| ataid++; |
| } |
| |
| printf("\n"); |
| } |
| |
| static void |
| ata_init() |
| { |
| // Scan PCI bus for ATA adapters |
| int count=0; |
| int bdf, max; |
| foreachpci(bdf, max) { |
| if (pci_config_readw(bdf, PCI_CLASS_DEVICE) != PCI_CLASS_STORAGE_IDE) |
| continue; |
| if (count >= ARRAY_SIZE(ATA_channels)) |
| break; |
| |
| u8 irq = pci_config_readb(bdf, PCI_INTERRUPT_LINE); |
| SET_GLOBAL(ATA_channels[count].irq, irq); |
| SET_GLOBAL(ATA_channels[count].pci_bdf, bdf); |
| |
| u8 prog_if = pci_config_readb(bdf, PCI_CLASS_PROG); |
| u32 port1, port2; |
| |
| if (prog_if & 1) { |
| port1 = pci_config_readl(bdf, PCI_BASE_ADDRESS_0) & ~3; |
| port2 = pci_config_readl(bdf, PCI_BASE_ADDRESS_1) & ~3; |
| } else { |
| port1 = 0x1f0; |
| port2 = 0x3f0; |
| } |
| SET_GLOBAL(ATA_channels[count].iobase1, port1); |
| SET_GLOBAL(ATA_channels[count].iobase2, port2); |
| dprintf(1, "ATA controller %d at %x/%x (dev %x prog_if %x)\n" |
| , count, port1, port2, bdf, prog_if); |
| count++; |
| |
| if (prog_if & 4) { |
| port1 = pci_config_readl(bdf, PCI_BASE_ADDRESS_2) & ~3; |
| port2 = pci_config_readl(bdf, PCI_BASE_ADDRESS_3) & ~3; |
| } else { |
| port1 = 0x170; |
| port2 = 0x370; |
| } |
| dprintf(1, "ATA controller %d at %x/%x (dev %x prog_if %x)\n" |
| , count, port1, port2, bdf, prog_if); |
| SET_GLOBAL(ATA_channels[count].iobase1, port1); |
| SET_GLOBAL(ATA_channels[count].iobase2, port2); |
| count++; |
| } |
| } |
| |
| void |
| ata_setup() |
| { |
| if (!CONFIG_ATA) |
| return; |
| |
| dprintf(3, "init hard drives\n"); |
| ata_init(); |
| ata_detect(); |
| |
| SET_BDA(disk_control_byte, 0xc0); |
| |
| enable_hwirq(14, entry_76); |
| } |