| // Low level ATA disk access |
| // |
| // Copyright (C) 2008 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" // pci_find_class |
| #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 "atabits.h" // ATA_CB_STAT |
| |
| #define TIMEOUT 0 |
| #define BSY 1 |
| #define NOT_BSY 2 |
| #define NOT_BSY_DRQ 3 |
| #define NOT_BSY_NOT_DRQ 4 |
| #define NOT_BSY_RDY 5 |
| |
| #define IDE_SECTOR_SIZE 512 |
| #define CDROM_SECTOR_SIZE 2048 |
| |
| #define IDE_TIMEOUT 32000 //32 seconds max for IDE ops |
| |
| struct ata_s ATA VAR16_32; |
| |
| |
| /**************************************************************** |
| * 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 |
| void |
| ata_reset(int driveid) |
| { |
| u8 channel = driveid / 2; |
| u8 slave = driveid % 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 = 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; |
| } |
| } |
| } |
| |
| // On a user-reset request, wait for RDY if it is an ATA device. |
| u8 type=GET_GLOBAL(ATA.devices[driveid].type); |
| if (type == ATA_TYPE_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); |
| } |
| |
| |
| /**************************************************************** |
| * 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 channel = driveid / 2; |
| u8 slave = driveid % 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 = 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 |
| ****************************************************************/ |
| |
| // Read and discard x number of bytes from an io channel. |
| static void |
| insx_discard(int iobase1, int bytes) |
| { |
| int count, i; |
| if (CONFIG_ATA_PIO32) { |
| count = bytes / 4; |
| for (i=0; i<count; i++) |
| inl(iobase1); |
| } else { |
| count = bytes / 2; |
| for (i=0; i<count; i++) |
| inw(iobase1); |
| } |
| } |
| |
| // Transfer 'count' blocks (of 'blocksize' bytes) to/from drive |
| // 'driveid'. If 'skipfirst' or 'skiplast' is set then the first |
| // and/or last block may be partially transferred. This function is |
| // inlined because all the callers use different forms and because the |
| // large number of parameters would consume a lot of stack space. |
| static __always_inline int |
| ata_transfer(int driveid, int iswrite, int count, int blocksize |
| , int skipfirst, int skiplast, void *buf_fl) |
| { |
| dprintf(16, "ata_transfer id=%d write=%d count=%d bs=%d" |
| " skipf=%d skipl=%d buf=%p\n" |
| , driveid, iswrite, count, blocksize |
| , skipfirst, skiplast, buf_fl); |
| |
| // Reset count of transferred data |
| SET_EBDA(sector_count, 0); |
| |
| u8 channel = driveid / 2; |
| u16 iobase1 = GET_GLOBAL(ATA.channels[channel].iobase1); |
| u16 iobase2 = GET_GLOBAL(ATA.channels[channel].iobase2); |
| int current = 0; |
| int status; |
| for (;;) { |
| int bsize = blocksize; |
| if (skipfirst && current == 0) { |
| insx_discard(iobase1, skipfirst); |
| bsize -= skipfirst; |
| } |
| if (skiplast && current == count-1) |
| bsize -= skiplast; |
| |
| if (iswrite) { |
| // Write data to controller |
| dprintf(16, "Write sector id=%d dest=%p\n", driveid, buf_fl); |
| if (CONFIG_ATA_PIO32) |
| outsl_fl(iobase1, buf_fl, bsize / 4); |
| else |
| outsw_fl(iobase1, buf_fl, bsize / 2); |
| } else { |
| // Read data from controller |
| dprintf(16, "Read sector id=%d dest=%p\n", driveid, buf_fl); |
| if (CONFIG_ATA_PIO32) |
| insl_fl(iobase1, buf_fl, bsize / 4); |
| else |
| insw_fl(iobase1, buf_fl, bsize / 2); |
| } |
| buf_fl += bsize; |
| |
| if (skiplast && current == count-1) |
| insx_discard(iobase1, skiplast); |
| |
| status = pause_await_not_bsy(iobase1, iobase2); |
| if (status < 0) |
| // Error |
| return status; |
| |
| current++; |
| SET_EBDA(sector_count, current); |
| if (current == 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); |
| 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; |
| } |
| |
| static noinline int |
| ata_transfer_disk(const struct disk_op_s *op) |
| { |
| return ata_transfer(op->driveid, op->command == ATA_CMD_WRITE_SECTORS |
| , op->count, IDE_SECTOR_SIZE, 0, 0, op->buf_fl); |
| } |
| |
| static noinline int |
| ata_transfer_cdrom(const struct disk_op_s *op) |
| { |
| return ata_transfer(op->driveid, 0, op->count, CDROM_SECTOR_SIZE |
| , 0, 0, op->buf_fl); |
| } |
| |
| static noinline int |
| ata_transfer_cdemu(const struct disk_op_s *op, int before, int after) |
| { |
| int vcount = op->count * 4 - before - after; |
| int ret = ata_transfer(op->driveid, 0, op->count, CDROM_SECTOR_SIZE |
| , before*512, after*512, op->buf_fl); |
| if (ret) { |
| SET_EBDA(sector_count, 0); |
| return ret; |
| } |
| SET_EBDA(sector_count, vcount); |
| return 0; |
| } |
| |
| |
| /**************************************************************** |
| * ATA hard drive functions |
| ****************************************************************/ |
| |
| static int |
| send_cmd_disk(const struct disk_op_s *op) |
| { |
| u64 lba = op->lba; |
| |
| struct ata_pio_command cmd; |
| memset(&cmd, 0, sizeof(cmd)); |
| |
| cmd.command = op->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; |
| |
| return send_cmd(op->driveid, &cmd); |
| } |
| |
| // Read/write count blocks from a harddrive. |
| int |
| ata_cmd_data(struct disk_op_s *op) |
| { |
| int ret = send_cmd_disk(op); |
| if (ret) |
| return ret; |
| return ata_transfer_disk(op); |
| } |
| |
| |
| /**************************************************************** |
| * ATAPI functions |
| ****************************************************************/ |
| |
| // Low-level atapi command transmit function. |
| static int |
| send_atapi_cmd(int driveid, u8 *cmdbuf, u8 cmdlen, u16 blocksize) |
| { |
| u8 channel = driveid / 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; |
| } |
| |
| // Low-level cdrom read atapi command transmit function. |
| static int |
| send_cmd_cdrom(const 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); |
| |
| return send_atapi_cmd(op->driveid, atacmd, sizeof(atacmd) |
| , CDROM_SECTOR_SIZE); |
| } |
| |
| // Read sectors from the cdrom. |
| int |
| cdrom_read(struct disk_op_s *op) |
| { |
| int ret = send_cmd_cdrom(op); |
| if (ret) |
| return ret; |
| |
| return ata_transfer_cdrom(op); |
| } |
| |
| // Pretend the cdrom has 512 byte sectors (instead of 2048) and read |
| // sectors. |
| int |
| cdrom_read_512(struct disk_op_s *op) |
| { |
| u32 vlba = op->lba; |
| u32 vcount = op->count; |
| u32 lba = op->lba = vlba / 4; |
| u32 velba = vlba + vcount - 1; |
| u32 elba = velba / 4; |
| op->count = elba - lba + 1; |
| int before = vlba % 4; |
| int after = 3 - (velba % 4); |
| |
| dprintf(16, "cdrom_read_512: id=%d vlba=%d vcount=%d buf=%p lba=%d elba=%d" |
| " count=%d before=%d after=%d\n" |
| , op->driveid, vlba, vcount, op->buf_fl, lba, elba |
| , op->count, before, after); |
| |
| int ret = send_cmd_cdrom(op); |
| if (ret) |
| return ret; |
| |
| return ata_transfer_cdemu(op, before, after); |
| } |
| |
| // 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; |
| |
| return ata_transfer(driveid, 0, 1, length, 0, 0, buf_fl); |
| } |
| |
| |
| /**************************************************************** |
| * Disk geometry translation |
| ****************************************************************/ |
| |
| static u8 |
| get_translation(int driveid) |
| { |
| if (! CONFIG_COREBOOT) { |
| // Emulators pass in the translation info via nvram. |
| u8 channel = driveid / 2; |
| u8 translation = inb_cmos(CMOS_BIOS_DISKTRANSFLAG + channel/2); |
| translation >>= 2 * (driveid % 4); |
| translation &= 0x03; |
| return translation; |
| } |
| |
| // On COREBOOT, use a heuristic to determine translation type. |
| u16 heads = GET_GLOBAL(ATA.devices[driveid].pchs.heads); |
| u16 cylinders = GET_GLOBAL(ATA.devices[driveid].pchs.cylinders); |
| u16 spt = GET_GLOBAL(ATA.devices[driveid].pchs.spt); |
| |
| if (cylinders <= 1024 && heads <= 16 && spt <= 63) |
| return ATA_TRANSLATION_NONE; |
| if (cylinders * heads <= 131072) |
| return ATA_TRANSLATION_LARGE; |
| return ATA_TRANSLATION_LBA; |
| } |
| |
| static void |
| setup_translation(int driveid) |
| { |
| u8 translation = get_translation(driveid); |
| SET_GLOBAL(ATA.devices[driveid].translation, translation); |
| |
| u8 channel = driveid / 2; |
| u8 slave = driveid % 2; |
| u16 heads = GET_GLOBAL(ATA.devices[driveid].pchs.heads); |
| u16 cylinders = GET_GLOBAL(ATA.devices[driveid].pchs.cylinders); |
| u16 spt = GET_GLOBAL(ATA.devices[driveid].pchs.spt); |
| u64 sectors = GET_GLOBAL(ATA.devices[driveid].sectors); |
| |
| dprintf(1, "ata%d-%d: PCHS=%u/%d/%d translation=" |
| , channel, slave, cylinders, heads, spt); |
| switch (translation) { |
| case ATA_TRANSLATION_NONE: |
| dprintf(1, "none"); |
| break; |
| case ATA_TRANSLATION_LBA: |
| dprintf(1, "lba"); |
| spt = 63; |
| if (sectors > 63*255*1024) { |
| heads = 255; |
| cylinders = 1024; |
| break; |
| } |
| u32 sect = (u32)sectors / 63; |
| heads = sect / 1024; |
| if (heads>128) |
| heads = 255; |
| else if (heads>64) |
| heads = 128; |
| else if (heads>32) |
| heads = 64; |
| else if (heads>16) |
| heads = 32; |
| else |
| heads = 16; |
| cylinders = sect / heads; |
| break; |
| case ATA_TRANSLATION_RECHS: |
| dprintf(1, "r-echs"); |
| // Take care not to overflow |
| if (heads==16) { |
| if (cylinders>61439) |
| cylinders=61439; |
| heads=15; |
| cylinders = (u16)((u32)(cylinders)*16/15); |
| } |
| // then go through the large bitshift process |
| case ATA_TRANSLATION_LARGE: |
| if (translation == ATA_TRANSLATION_LARGE) |
| dprintf(1, "large"); |
| while (cylinders > 1024) { |
| cylinders >>= 1; |
| heads <<= 1; |
| |
| // If we max out the head count |
| if (heads > 127) |
| break; |
| } |
| break; |
| } |
| // clip to 1024 cylinders in lchs |
| if (cylinders > 1024) |
| cylinders = 1024; |
| dprintf(1, " LCHS=%d/%d/%d\n", cylinders, heads, spt); |
| |
| SET_GLOBAL(ATA.devices[driveid].lchs.heads, heads); |
| SET_GLOBAL(ATA.devices[driveid].lchs.cylinders, cylinders); |
| SET_GLOBAL(ATA.devices[driveid].lchs.spt, spt); |
| } |
| |
| |
| /**************************************************************** |
| * ATA detect and init |
| ****************************************************************/ |
| |
| // 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 = ATA.devices[driveid].model; |
| int maxsize = ARRAY_SIZE(ATA.devices[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; |
| |
| // Extract ATA/ATAPI version. |
| u16 ataversion = buffer[80]; |
| u8 version; |
| for (version=15; version>0; version--) |
| if (ataversion & (1<<version)) |
| break; |
| ATA.devices[driveid].version = version; |
| |
| // Common flags. |
| SET_GLOBAL(ATA.devices[driveid].removable, (buffer[0] & 0x80) ? 1 : 0); |
| } |
| |
| static int |
| init_drive_atapi(int driveid) |
| { |
| // Send an IDENTIFY_DEVICE_PACKET command to device |
| u16 buffer[256]; |
| memset(buffer, 0, sizeof(buffer)); |
| struct disk_op_s dop; |
| dop.driveid = driveid; |
| dop.command = ATA_CMD_IDENTIFY_DEVICE_PACKET; |
| dop.count = 1; |
| dop.lba = 1; |
| dop.buf_fl = MAKE_FLATPTR(GET_SEG(SS), buffer); |
| int ret = ata_cmd_data(&dop); |
| if (ret) |
| return ret; |
| |
| // Success - setup as ATAPI. |
| extract_identify(driveid, buffer); |
| SET_GLOBAL(ATA.devices[driveid].type, ATA_TYPE_ATAPI); |
| SET_GLOBAL(ATA.devices[driveid].device, (buffer[0] >> 8) & 0x1f); |
| SET_GLOBAL(ATA.devices[driveid].blksize, CDROM_SECTOR_SIZE); |
| |
| // fill cdidmap |
| u8 cdcount = GET_GLOBAL(ATA.cdcount); |
| SET_GLOBAL(ATA.idmap[1][cdcount], driveid); |
| SET_GLOBAL(ATA.cdcount, cdcount+1); |
| |
| // Report drive info to user. |
| u8 channel = driveid / 2; |
| u8 slave = driveid % 2; |
| printf("ata%d-%d: %s ATAPI-%d %s\n", channel, slave |
| , ATA.devices[driveid].model, ATA.devices[driveid].version |
| , (ATA.devices[driveid].device == ATA_DEVICE_CDROM |
| ? "CD-Rom/DVD-Rom" : "Device")); |
| |
| return 0; |
| } |
| |
| static int |
| init_drive_ata(int driveid) |
| { |
| // Send an IDENTIFY_DEVICE command to device |
| u16 buffer[256]; |
| memset(buffer, 0, sizeof(buffer)); |
| struct disk_op_s dop; |
| dop.driveid = driveid; |
| dop.command = ATA_CMD_IDENTIFY_DEVICE; |
| dop.count = 1; |
| dop.lba = 1; |
| dop.buf_fl = MAKE_FLATPTR(GET_SEG(SS), buffer); |
| int ret = ata_cmd_data(&dop); |
| if (ret) |
| return ret; |
| |
| // Success - setup as ATA. |
| extract_identify(driveid, buffer); |
| SET_GLOBAL(ATA.devices[driveid].type, ATA_TYPE_ATA); |
| SET_GLOBAL(ATA.devices[driveid].device, ATA_DEVICE_HD); |
| SET_GLOBAL(ATA.devices[driveid].blksize, IDE_SECTOR_SIZE); |
| |
| SET_GLOBAL(ATA.devices[driveid].pchs.cylinders, buffer[1]); |
| SET_GLOBAL(ATA.devices[driveid].pchs.heads, buffer[3]); |
| SET_GLOBAL(ATA.devices[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(ATA.devices[driveid].sectors, sectors); |
| |
| // Setup disk geometry translation. |
| setup_translation(driveid); |
| |
| // Report drive info to user. |
| u8 channel = driveid / 2; |
| u8 slave = driveid % 2; |
| char *model = ATA.devices[driveid].model; |
| printf("ata%d-%d: %s ATA-%d Hard-Disk ", channel, slave, model |
| , ATA.devices[driveid].version); |
| u64 sizeinmb = sectors >> 11; |
| if (sizeinmb < (1 << 16)) |
| printf("(%u MiBytes)\n", (u32)sizeinmb); |
| else |
| printf("(%u GiBytes)\n", (u32)(sizeinmb >> 10)); |
| |
| // Register with bcv system. |
| add_bcv_hd(driveid, model); |
| |
| 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 driveid, last_reset_driveid=-1; |
| for(driveid=0; driveid<CONFIG_MAX_ATA_DEVICES; driveid++) { |
| u8 channel = driveid / 2; |
| u8 slave = driveid % 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); |
| 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 drive=%d sc=%x sn=%x dh=%x\n" |
| , driveid, sc, sn, dh); |
| if (sc != 0x55 || sn != 0xaa || dh != newdh) |
| continue; |
| |
| // reset the channel |
| if (slave && driveid == last_reset_driveid + 1) { |
| // The drive was just reset - no need to reset it again. |
| } else { |
| ata_reset(driveid); |
| last_reset_driveid = driveid; |
| } |
| |
| // check for ATAPI |
| int ret = init_drive_atapi(driveid); |
| if (!ret) |
| // Found an ATAPI drive. |
| continue; |
| |
| 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. |
| init_drive_ata(driveid); |
| } |
| |
| printf("\n"); |
| } |
| |
| static void |
| ata_init() |
| { |
| memset(&ATA, 0, sizeof(ATA)); |
| |
| // hdidmap and cdidmap init. |
| u8 device; |
| for (device=0; device < CONFIG_MAX_ATA_DEVICES; device++) { |
| SET_GLOBAL(ATA.idmap[0][device], CONFIG_MAX_ATA_DEVICES); |
| SET_GLOBAL(ATA.idmap[1][device], CONFIG_MAX_ATA_DEVICES); |
| } |
| |
| // 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 |
| hard_drive_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); |
| } |
| |
| |
| /**************************************************************** |
| * Drive mapping |
| ****************************************************************/ |
| |
| // Fill in Fixed Disk Parameter Table (located in ebda). |
| static void |
| fill_fdpt(int driveid) |
| { |
| if (driveid > 1) |
| return; |
| |
| u16 nlc = GET_GLOBAL(ATA.devices[driveid].lchs.cylinders); |
| u16 nlh = GET_GLOBAL(ATA.devices[driveid].lchs.heads); |
| u16 nlspt = GET_GLOBAL(ATA.devices[driveid].lchs.spt); |
| |
| u16 npc = GET_GLOBAL(ATA.devices[driveid].pchs.cylinders); |
| u16 nph = GET_GLOBAL(ATA.devices[driveid].pchs.heads); |
| u16 npspt = GET_GLOBAL(ATA.devices[driveid].pchs.spt); |
| |
| struct fdpt_s *fdpt = &get_ebda_ptr()->fdpt[driveid]; |
| fdpt->precompensation = 0xffff; |
| fdpt->drive_control_byte = 0xc0 | ((nph > 8) << 3); |
| fdpt->landing_zone = npc; |
| fdpt->cylinders = nlc; |
| fdpt->heads = nlh; |
| fdpt->sectors = nlspt; |
| |
| if (nlc == npc && nlh == nph && nlspt == npspt) |
| // no logical CHS mapping used, just physical CHS |
| // use Standard Fixed Disk Parameter Table (FDPT) |
| return; |
| |
| // complies with Phoenix style Translated Fixed Disk Parameter |
| // Table (FDPT) |
| fdpt->phys_cylinders = npc; |
| fdpt->phys_heads = nph; |
| fdpt->phys_sectors = npspt; |
| fdpt->a0h_signature = 0xa0; |
| |
| // Checksum structure. |
| u8 sum = checksum(fdpt, sizeof(*fdpt)-1); |
| fdpt->checksum = -sum; |
| } |
| |
| // Map a drive (that was registered via add_bcv_hd) |
| void |
| map_drive(int driveid) |
| { |
| // fill hdidmap |
| u8 hdcount = GET_BDA(hdcount); |
| dprintf(3, "Mapping driveid %d to %d\n", driveid, hdcount); |
| SET_GLOBAL(ATA.idmap[0][hdcount], driveid); |
| SET_BDA(hdcount, hdcount + 1); |
| |
| // Fill "fdpt" structure. |
| fill_fdpt(hdcount); |
| } |