diff options
author | Greg Watson <jarrah@users.sourceforge.net> | 2003-06-09 21:29:23 +0000 |
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committer | Greg Watson <jarrah@users.sourceforge.net> | 2003-06-09 21:29:23 +0000 |
commit | 032211593248d4d9a569ecfd269a2433ea5b1c7c (patch) | |
tree | 0cd5ca04ea4add897a92f4df7c6cc37730d8daf8 /src/pc80/ide | |
parent | fd958cea68e7df40c47a3a97762d2433b5a52819 (diff) |
Moved from freebios
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@862 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/pc80/ide')
-rw-r--r-- | src/pc80/ide/ide.c | 513 |
1 files changed, 513 insertions, 0 deletions
diff --git a/src/pc80/ide/ide.c b/src/pc80/ide/ide.c new file mode 100644 index 0000000000..823c5b5b6d --- /dev/null +++ b/src/pc80/ide/ide.c @@ -0,0 +1,513 @@ +#define BSY_SET_DURING_SPINUP 1 +/* + * UBL, The Universal Talkware Boot Loader + * Copyright (C) 2000 Universal Talkware Inc. + * Copyright (C) 2002 Eric Biederman + * + * 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 + * + * + */ + +#include <arch/io.h> +#include <printk.h> +#include <string.h> +#include <delay.h> +#include <pci.h> +#include <pc80/ide.h> +#include <arch/io.h> + +struct controller controller; +struct harddisk_info harddisk_info[NUM_HD]; + +static int await_ide(int (*done)(struct controller *ctrl), + struct controller *ctrl, unsigned long timeout) +{ + int result; + for(;;) { + result = done(ctrl); + if (result) { + return 0; + } + if (timeout-- <= 0) { + break; + } + udelay(1000); /* Added to avoid spinning GRW */ + } + return -1; +} + +/* The maximum time any IDE command can last 31 seconds, + * So if any IDE commands takes this long we know we have problems. + */ +#define IDE_TIMEOUT (32*1000) + +static int not_bsy(struct controller *ctrl) +{ + return !(inb(IDE_REG_STATUS(ctrl)) & IDE_STATUS_BSY); +} +#if !BSY_SET_DURING_SPINUP +static int timeout(struct controller *ctrl) +{ + return 0; +} +#endif + +static int ide_software_reset(struct controller *ctrl) +{ + /* Wait a little bit in case this is immediately after + * hardware reset. + */ + udelay(2000); + /* A software reset should not be delivered while the bsy bit + * is set. If the bsy bit does not clear in a reasonable + * amount of time give up. + */ + if (await_ide(not_bsy, ctrl, IDE_TIMEOUT) < 0) { + return -1; + } + + /* Disable Interrupts and reset the ide bus */ + outb(IDE_CTRL_HD15 | IDE_CTRL_SRST | IDE_CTRL_NIEN, + IDE_REG_DEVICE_CONTROL(ctrl)); + udelay(5); + outb(IDE_CTRL_HD15 | IDE_CTRL_NIEN, IDE_REG_DEVICE_CONTROL(ctrl)); + udelay(2000); + if (await_ide(not_bsy, ctrl, IDE_TIMEOUT) < 0) { + return -1; + } + return 0; +} + +static void pio_set_registers( + struct controller *ctrl, const struct ide_pio_command *cmd) +{ + uint8_t device; + /* Disable Interrupts */ + outb(IDE_CTRL_HD15 | IDE_CTRL_NIEN, IDE_REG_DEVICE_CONTROL(ctrl)); + + /* Possibly switch selected device */ + device = inb(IDE_REG_DEVICE(ctrl)); + outb(cmd->device, IDE_REG_DEVICE(ctrl)); + if ((device & (1UL << 4)) != (cmd->device & (1UL << 4))) { + /* Allow time for the selected drive to switch, + * The linux ide code suggests 50ms is the right + * amount of time to use here. + */ + udelay(50000); + } + outb(cmd->feature, IDE_REG_FEATURE(ctrl)); + outb(cmd->sector_count2, IDE_REG_SECTOR_COUNT(ctrl)); + outb(cmd->sector_count, IDE_REG_SECTOR_COUNT(ctrl)); + outb(cmd->lba_low2, IDE_REG_LBA_LOW(ctrl)); + outb(cmd->lba_low, IDE_REG_LBA_LOW(ctrl)); + outb(cmd->lba_mid2, IDE_REG_LBA_MID(ctrl)); + outb(cmd->lba_mid, IDE_REG_LBA_MID(ctrl)); + outb(cmd->lba_high2, IDE_REG_LBA_HIGH(ctrl)); + outb(cmd->lba_high, IDE_REG_LBA_HIGH(ctrl)); + outb(cmd->command, IDE_REG_COMMAND(ctrl)); +} + + +static int pio_non_data(struct controller *ctrl, const struct ide_pio_command *cmd) +{ + /* Wait until the busy bit is clear */ + if (await_ide(not_bsy, ctrl, IDE_TIMEOUT) < 0) { + return -1; + } + + pio_set_registers(ctrl, cmd); + if (await_ide(not_bsy, ctrl, IDE_TIMEOUT) < 0) { + return -1; + } + /* FIXME is there more error checking I could do here? */ + return 0; +} + +static int pio_data_in(struct controller *ctrl, const struct ide_pio_command *cmd, + void *buffer, size_t bytes) +{ + unsigned int status; + + /* FIXME handle commands with multiple blocks */ + /* Wait until the busy bit is clear */ + if (await_ide(not_bsy, ctrl, IDE_TIMEOUT) < 0) { + return -1; + } + + /* How do I tell if INTRQ is asserted? */ + pio_set_registers(ctrl, cmd); + if (await_ide(not_bsy, ctrl, IDE_TIMEOUT) < 0) { + return -1; + } + status = inb(IDE_REG_STATUS(ctrl)); + if (!(status & IDE_STATUS_DRQ)) { + return -1; + } + insw(IDE_REG_DATA(ctrl), buffer, bytes/2); + status = inb(IDE_REG_STATUS(ctrl)); + if (status & IDE_STATUS_ERR) { + return -1; + } + return 0; +} + +static inline int ide_read_sector_chs( + struct harddisk_info *info, void *buffer, unsigned long sector) +{ + struct ide_pio_command cmd; + unsigned int track; + unsigned int offset; + unsigned int cylinder; + + memset(&cmd, 0, sizeof(cmd)); + cmd.sector_count = 1; + + track = sector / info->sectors_per_track; + /* Sector number */ + offset = 1 + (sector % info->sectors_per_track); + cylinder = track / info->heads; + cmd.lba_low = offset; + cmd.lba_mid = cylinder & 0xff; + cmd.lba_high = (cylinder >> 8) & 0xff; + cmd.device = IDE_DH_DEFAULT | + IDE_DH_HEAD(track % info->heads) | + info->slave | + IDE_DH_CHS; + cmd.command = IDE_CMD_READ_SECTORS; + return pio_data_in(info->ctrl, &cmd, buffer, IDE_SECTOR_SIZE); +} + +static inline int ide_read_sector_lba( + struct harddisk_info *info, void *buffer, unsigned long sector) +{ + struct ide_pio_command cmd; + memset(&cmd, 0, sizeof(cmd)); + + cmd.sector_count = 1; + cmd.lba_low = sector & 0xff; + cmd.lba_mid = (sector >> 8) & 0xff; + cmd.lba_high = (sector >> 16) & 0xff; + cmd.device = IDE_DH_DEFAULT | + ((sector >> 24) & 0x0f) | + info->slave | + IDE_DH_LBA; + cmd.command = IDE_CMD_READ_SECTORS; + return pio_data_in(info->ctrl, &cmd, buffer, IDE_SECTOR_SIZE); +} + +static inline int ide_read_sector_lba48( + struct harddisk_info *info, void *buffer, sector_t sector) +{ + struct ide_pio_command cmd; + memset(&cmd, 0, sizeof(cmd)); + + cmd.sector_count = 1; + cmd.lba_low = sector & 0xff; + cmd.lba_mid = (sector >> 8) & 0xff; + cmd.lba_high = (sector >> 16) & 0xff; + cmd.lba_low2 = (sector >> 24) & 0xff; + cmd.lba_mid2 = (sector >> 32) & 0xff; + cmd.lba_high2 = (sector >> 40) & 0xff; + cmd.device = info->slave | IDE_DH_LBA; + cmd.command = IDE_CMD_READ_SECTORS_EXT; + return pio_data_in(info->ctrl, &cmd, buffer, IDE_SECTOR_SIZE); +} + +int ide_read_sector(int driveno, void * buf, unsigned int sector, + int byte_offset, int n_bytes) +{ + struct harddisk_info *info = &harddisk_info[driveno]; + int result; + + /* Report the buffer is empty */ + if (sector > info->sectors) { + return -1; + } + if (info->address_mode == ADDRESS_MODE_CHS) { + result = ide_read_sector_chs(info, buf, sector); + } + else if (info->address_mode == ADDRESS_MODE_LBA) { + result = ide_read_sector_lba(info, buf, sector); + } + else if (info->address_mode == ADDRESS_MODE_LBA48) { + result = ide_read_sector_lba48(info, buf, sector); + } + else { + result = -1; + } + return result; +} + +static int init_drive(struct harddisk_info *info, struct controller *ctrl, int slave, int basedrive) +{ + uint16_t* drive_info; + struct ide_pio_command cmd; + unsigned char disk_buffer[DISK_BUFFER_SIZE]; + int i; + + info->ctrl = ctrl; + info->heads = 0u; + info->cylinders = 0u; + info->sectors_per_track = 0u; + info->address_mode = IDE_DH_CHS; + info->sectors = 0ul; + info->drive_exists = 0; + info->slave_absent = 0; + info->slave = slave?IDE_DH_SLAVE: IDE_DH_MASTER; + info->basedrive = basedrive; + + printk_info("Testing for disk %d\n", info->basedrive); + + /* Select the drive that we are testing */ + outb(IDE_DH_DEFAULT | IDE_DH_HEAD(0) | IDE_DH_CHS | info->slave, + IDE_REG_DEVICE(ctrl)); + udelay(50000); + + /* Test to see if the drive registers exist, + * In many cases this quickly rules out a missing drive. + */ + for(i = 0; i < 4; i++) { + outb(0xaa + i, (ctrl->cmd_base) + 2 + i); + } + for(i = 0; i < 4; i++) { + if (inb((ctrl->cmd_base) + 2 + i) != 0xaa + i) { + return 1; + } + } + for(i = 0; i < 4; i++) { + outb(0x55 + i, (ctrl->cmd_base) + 2 + i); + } + for(i = 0; i < 4; i++) { + if (inb((ctrl->cmd_base) + 2 + i) != 0x55 + i) { + return 1; + } + } + + printk_info("Probing for disk %d\n", info->basedrive); + + memset(&cmd, 0, sizeof(cmd)); + cmd.device = IDE_DH_DEFAULT | IDE_DH_HEAD(0) | IDE_DH_CHS | info->slave; + cmd.command = IDE_CMD_IDENTIFY_DEVICE; + + + if (pio_data_in(ctrl, &cmd, disk_buffer, IDE_SECTOR_SIZE) < 0) { + /* Well, if that command didn't work, we probably don't have drive. */ + return 1; + } + + + /* Now suck the data out */ + drive_info = (uint16_t *)disk_buffer; + if (drive_info[2] == 0x37C8) { + /* If the response is incomplete spin up the drive... */ + memset(&cmd, 0, sizeof(cmd)); + cmd.device = IDE_DH_DEFAULT | IDE_DH_HEAD(0) | IDE_DH_CHS | + info->slave; + cmd.feature = IDE_FEATURE_STANDBY_SPINUP_DRIVE; + if (pio_non_data(ctrl, &cmd) < 0) { + /* If the command doesn't work give up on the drive */ + return 1; + } + + } + if ((drive_info[2] == 0x37C8) || (drive_info[2] == 0x8C73)) { + /* The response is incomplete retry the drive info command */ + memset(&cmd, 0, sizeof(cmd)); + cmd.device = IDE_DH_DEFAULT | IDE_DH_HEAD(0) | IDE_DH_CHS | + info->slave; + cmd.command = IDE_CMD_IDENTIFY_DEVICE; + if(pio_data_in(ctrl, &cmd, disk_buffer, IDE_SECTOR_SIZE) < 0) { + /* If the command didn't work give up on the drive. */ + return 1; + } + } + if ((drive_info[2] != 0x37C8) && + (drive_info[2] != 0x738C) && + (drive_info[2] != 0x8C73) && + (drive_info[2] != 0xC837) && + (drive_info[2] != 0x0000)) { + printk_info("Invalid IDE Configuration: %hx\n", drive_info[2]); + return 1; + } + for(i = 27; i < 47; i++) { + info->model_number[((i-27)<< 1)] = (drive_info[i] >> 8) & 0xff; + info->model_number[((i-27)<< 1)+1] = drive_info[i] & 0xff; + } + info->model_number[40] = '\0'; + info->drive_exists = 1; + + /* See if LBA is supported */ + if (drive_info[49] & (1 << 9)) { + info->address_mode = ADDRESS_MODE_LBA; + info->sectors = (drive_info[61] << 16) | (drive_info[60]); + /* Enable LBA48 mode if it is present */ + if (drive_info[83] & (1 <<10)) { + /* Should LBA48 depend on LBA? */ + printk_info("LBA48 mode\n"); + info->address_mode = ADDRESS_MODE_LBA48; + info->sectors = + (((sector_t)drive_info[103]) << 48) | + (((sector_t)drive_info[102]) << 32) | + (((sector_t)drive_info[101]) << 16) | + (((sector_t)drive_info[100]) << 0); + } + } else { + info->address_mode = ADDRESS_MODE_CHS; + info->heads = drive_info[3]; + info->cylinders = drive_info[1]; + info->sectors_per_track = drive_info[6]; + info->sectors = + info->sectors_per_track * + info->heads * + info->cylinders; + printk_info("%s sectors_per_track=[%d], heads=[%d], cylinders=[%d]\n", + __FUNCTION__, + info->sectors_per_track, + info->heads, + info->cylinders); + } + /* See if we have a slave */ + if (!info->slave && (((drive_info[93] >> 14) & 3) == 1)) { + info->slave_absent = !(drive_info[93] & (1 << 5)); + } + /* See if we need to put the device in CFA power mode 1 */ + if ((drive_info[160] & ((1 << 15) | (1 << 13)| (1 << 12))) == + ((1 << 15) | (1 << 13)| (1 << 12))) { + memset(&cmd, 0, sizeof(cmd)); + cmd.device = IDE_DH_DEFAULT | IDE_DH_HEAD(0) | IDE_DH_CHS | info->slave; + cmd.feature = IDE_FEATURE_CFA_ENABLE_POWER_MODE1; + if (pio_non_data(ctrl, &cmd) < 0) { + /* If I need to power up the drive, and I can't + * give up. + */ + printk_info("Cannot power up CFA device\n"); + return 1; + } + } + printk_info("disk%d %dk cap: %hx\n", + info->basedrive, + (unsigned long)(info->sectors >> 1), + drive_info[49]); + return 0; +} + +static int init_controller(struct controller *ctrl, int basedrive) +{ + struct harddisk_info *info; + + /* Put the drives ide channel in a know state and wait + * for the drives to spinup. + * + * In practice IDE disks tend not to respond to commands until + * they have spun up. This makes IDE hard to deal with + * immediately after power up, as the delays can be quite + * long, so we must be very careful here. + * + * There are two pathological cases that must be dealt with: + * + * - The BSY bit not being set while the IDE drives spin up. + * In this cases only a hard coded delay will work. As + * I have not reproduced it, and this is out of spec for + * IDE drives the work around can be enabled by setting + * BSY_SET_DURING_SPINUP to 0. + * + * - The BSY bit floats high when no drives are plugged in. + * This case will not be detected except by timing out but + * we avoid the problems by only probing devices we are + * supposed to boot from. If we don't do the probe we + * will not experience the problem. + * + * So speed wise I am only slow if the BSY bit is not set + * or not reported by the IDE controller during spinup, which + * is quite rare. + * + */ +#if !BSY_SET_DURING_SPINUP + if (await_ide(timeout, ctrl, IDE_TIMEOUT) < 0) { + return -1; + } +#endif + if (ide_software_reset(ctrl) < 0) { + return -1; + } + + /* Note: I have just done a software reset. It may be + * reasonable to just read the boot time signatures + * off of the drives to see if they are present. + * + * For now I will go with just sending commands to the drives + * and assuming filtering out missing drives by detecting registers + * that won't set and commands that fail to execute properly. + */ + + /* Now initialize the individual drives */ + info = &harddisk_info[basedrive]; + init_drive(info, ctrl, 0, basedrive & 1); + + /* at the moment this only works for the first drive */ +#if 0 + if (info->drive_exists && !info->slave_absent) { + basedrive++; + info++; + init_drive(info, ctrl, 1, basedrive & 1); + } +#endif + + return 0; +} + +int ide_init(void) +{ + int index; + int drives = 0; + + /* Intialize the harddisk_info structures */ + memset(harddisk_info, 0, sizeof(harddisk_info)); + + for(index = 0; index < 1; index++) { +#if 0 + /* IDE normal pci mode */ + unsigned cmd_reg, ctrl_reg; + uint32_t cmd_base, ctrl_base; + if (index < 2) { + cmd_reg = PCI_BASE_ADDRESS_0; + ctrl_reg = PCI_BASE_ADDRESS_1; + } else { + cmd_reg = PCI_BASE_ADDRESS_2; + ctrl_reg = PCI_BASE_ADDRESS_3; + } + pcibios_read_config_dword(0, 0, cmd_reg, &cmd_base); + pcibios_read_config_dword(0, 0, ctrl_reg, &ctrl_base); + controller.cmd_base = cmd_base & ~3; + controller.ctrl_base = ctrl_base & ~3; + +#endif + uint16_t base; + base = (index < 1)?IDE_BASE0:IDE_BASE1; + controller.cmd_base = base; + controller.ctrl_base = base + IDE_REG_EXTENDED_OFFSET; + + printk_info("init_controller %d at (%x, %x)\n", index, controller.cmd_base, controller.ctrl_base); + + if (init_controller(&controller, index << 1) < 0) { + /* nothing behind the controller */ + continue; + } + drives++; + } + + return drives > 0 ? 0 : -1; +} |