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-rw-r--r--src/pc80/ide/ide.c665
1 files changed, 557 insertions, 108 deletions
diff --git a/src/pc80/ide/ide.c b/src/pc80/ide/ide.c
index 99225a2a47..f2b39427ca 100644
--- a/src/pc80/ide/ide.c
+++ b/src/pc80/ide/ide.c
@@ -1,42 +1,29 @@
-#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
- *
- *
- */
+/* Derived from Etherboot 5.1 */
-#include <arch/io.h>
-#include <console/console.h>
+#include <stdlib.h>
#include <string.h>
-#include <delay.h>
-#include <device/pci.h>
-#include <pc80/ide.h>
+#include <console/console.h>
#include <arch/io.h>
+#include <pc80/ide.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <delay.h>
+#include <arch/byteorder.h>
-#ifndef CONFIG_IDE_MAXBUS
-#define CONFIG_IDE_MAXBUS 2
-#endif
+#define BSY_SET_DURING_SPINUP 1
+
+static unsigned short ide_base[] = {
+ IDE_BASE0,
+ IDE_BASE1,
+ IDE_BASE2,
+ IDE_BASE3,
+ 0
+};
-struct controller controller;
-struct harddisk_info harddisk_info[NUM_HD];
-extern uint32_t ide_base[CONFIG_IDE_MAXBUS];
+static struct controller controllers[IDE_MAX_CONTROLLERS];
+static struct harddisk_info harddisk_info[IDE_MAX_DRIVES];
+static unsigned char ide_buffer[IDE_SECTOR_SIZE];
static int await_ide(int (*done)(struct controller *ctrl),
struct controller *ctrl, unsigned long timeout)
@@ -47,11 +34,13 @@ static int await_ide(int (*done)(struct controller *ctrl),
if (result) {
return 0;
}
- if (timeout-- <= 0) {
+ //poll_interruptions();
+ if (timeout-- <= 0) {
break;
}
- udelay(1000); /* Added to avoid spinning GRW */
+ udelay(1000); /* Added to avoid spinning GRW */
}
+ printk_info("IDE time out\n");
return -1;
}
@@ -64,6 +53,16 @@ static int not_bsy(struct controller *ctrl)
{
return !(inb(IDE_REG_STATUS(ctrl)) & IDE_STATUS_BSY);
}
+
+/* IDE drives assert BSY bit within 400 nsec when SRST is set.
+ * Use 2 msec since our tick is 1 msec */
+#define IDE_RESET_PULSE 2
+
+static int bsy(struct controller *ctrl)
+{
+ return inb(IDE_REG_STATUS(ctrl)) & IDE_STATUS_BSY;
+}
+
#if !BSY_SET_DURING_SPINUP
static int timeout(struct controller *ctrl)
{
@@ -71,26 +70,39 @@ static int timeout(struct controller *ctrl)
}
#endif
+static void print_status(struct controller *ctrl)
+{
+ printk_debug("IDE: status=%#x, err=%#x\n",
+ inb(IDE_REG_STATUS(ctrl)), inb(IDE_REG_ERROR(ctrl)));
+}
+
static int ide_software_reset(struct controller *ctrl)
{
/* Wait a little bit in case this is immediately after
* hardware reset.
*/
- udelay(2000);
+ mdelay(2);
/* 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.
*/
+ printk_debug("Waiting for ide%d to become ready for reset... ",
+ ctrl - controllers);
if (await_ide(not_bsy, ctrl, IDE_TIMEOUT) < 0) {
+ printk_debug("failed\n");
return -1;
}
+ printk_debug("ok\n");
/* Disable Interrupts and reset the ide bus */
outb(IDE_CTRL_HD15 | IDE_CTRL_SRST | IDE_CTRL_NIEN,
IDE_REG_DEVICE_CONTROL(ctrl));
- udelay(5);
+ /* If BSY bit is not asserted within 400ns, no device there */
+ if (await_ide(bsy, ctrl, IDE_RESET_PULSE) < 0) {
+ return -1;
+ }
outb(IDE_CTRL_HD15 | IDE_CTRL_NIEN, IDE_REG_DEVICE_CONTROL(ctrl));
- udelay(2000);
+ mdelay(2);
if (await_ide(not_bsy, ctrl, IDE_TIMEOUT) < 0) {
return -1;
}
@@ -112,16 +124,18 @@ static void pio_set_registers(
* The linux ide code suggests 50ms is the right
* amount of time to use here.
*/
- udelay(50000);
+ mdelay(50);
}
outb(cmd->feature, IDE_REG_FEATURE(ctrl));
- outb(cmd->sector_count2, IDE_REG_SECTOR_COUNT(ctrl));
+ if (cmd->command == IDE_CMD_READ_SECTORS_EXT) {
+ outb(cmd->sector_count2, IDE_REG_SECTOR_COUNT(ctrl));
+ outb(cmd->lba_low2, IDE_REG_LBA_LOW(ctrl));
+ outb(cmd->lba_mid2, IDE_REG_LBA_MID(ctrl));
+ outb(cmd->lba_high2, IDE_REG_LBA_HIGH(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));
}
@@ -135,6 +149,7 @@ static int pio_non_data(struct controller *ctrl, const struct ide_pio_command *c
}
pio_set_registers(ctrl, cmd);
+ udelay(1);
if (await_ide(not_bsy, ctrl, IDE_TIMEOUT) < 0) {
return -1;
}
@@ -142,7 +157,8 @@ static int pio_non_data(struct controller *ctrl, const struct ide_pio_command *c
return 0;
}
-static int pio_data_in(struct controller *ctrl, const struct ide_pio_command *cmd,
+static int pio_data_in(struct controller *ctrl,
+ const struct ide_pio_command *cmd,
void *buffer, size_t bytes)
{
unsigned int status;
@@ -155,16 +171,125 @@ static int pio_data_in(struct controller *ctrl, const struct ide_pio_command *cm
/* How do I tell if INTRQ is asserted? */
pio_set_registers(ctrl, cmd);
+ udelay(1);
if (await_ide(not_bsy, ctrl, IDE_TIMEOUT) < 0) {
return -1;
}
status = inb(IDE_REG_STATUS(ctrl));
if (!(status & IDE_STATUS_DRQ)) {
+ print_status(ctrl);
return -1;
}
insw(IDE_REG_DATA(ctrl), buffer, bytes/2);
status = inb(IDE_REG_STATUS(ctrl));
- if (status & IDE_STATUS_ERR) {
+ if (status & IDE_STATUS_DRQ) {
+ print_status(ctrl);
+ return -1;
+ }
+ return 0;
+}
+
+#ifdef __BIG_ENDIAN
+static int pio_data_in_sw(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);
+ udelay(1);
+ if (await_ide(not_bsy, ctrl, IDE_TIMEOUT) < 0) {
+ return -1;
+ }
+ status = inb(IDE_REG_STATUS(ctrl));
+ if (!(status & IDE_STATUS_DRQ)) {
+ print_status(ctrl);
+ return -1;
+ }
+ insw_ns(IDE_REG_DATA(ctrl), buffer, bytes/2);
+ status = inb(IDE_REG_STATUS(ctrl));
+ if (status & IDE_STATUS_DRQ) {
+ print_status(ctrl);
+ return -1;
+ }
+ return 0;
+}
+#endif /* __BIG_ENDIAN */
+
+static int pio_packet(struct harddisk_info *info, int in,
+ const void *packet, int packet_len,
+ void *buffer, int buffer_len)
+{
+ unsigned int status;
+ struct ide_pio_command cmd;
+
+ memset(&cmd, 0, sizeof(cmd));
+
+ /* Wait until the busy bit is clear */
+ if (await_ide(not_bsy, info->ctrl, IDE_TIMEOUT) < 0) {
+ return -1;
+ }
+
+ /* Issue a PACKET command */
+ cmd.lba_mid = (uint8_t) buffer_len;
+ cmd.lba_high = (uint8_t) (buffer_len >> 8);
+ cmd.device = IDE_DH_DEFAULT | info->slave;
+ cmd.command = IDE_CMD_PACKET;
+ pio_set_registers(info->ctrl, &cmd);
+ udelay(1);
+ if (await_ide(not_bsy, info->ctrl, IDE_TIMEOUT) < 0) {
+ return -1;
+ }
+ status = inb(IDE_REG_STATUS(info->ctrl));
+ if (!(status & IDE_STATUS_DRQ)) {
+ printk_debug("no drq after PACKET\n");
+ print_status(info->ctrl);
+ return -1;
+ }
+
+ /* Send the packet */
+#ifdef __BIG_ENDIAN
+ outsw_ns(IDE_REG_DATA(info->ctrl), packet, packet_len/2);
+#else /* __BIG_ENDIAN */
+ outsw(IDE_REG_DATA(info->ctrl), packet, packet_len/2);
+#endif /* __BIG_ENDIAN */
+
+ if (await_ide(not_bsy, info->ctrl, IDE_TIMEOUT) < 0) {
+ return -1;
+ }
+ status = inb(IDE_REG_STATUS(info->ctrl));
+ if (buffer_len == 0) {
+ if (status & IDE_STATUS_DRQ) {
+ printk_debug("drq after non-data command\n");
+ print_status(info->ctrl);
+ return -1;
+ }
+ return 0;
+ }
+
+ if (!(status & IDE_STATUS_DRQ)) {
+ printk_debug("no drq after sending packet\n");
+ print_status(info->ctrl);
+ return -1;
+ }
+
+#ifdef __BIG_ENDIAN
+ insw_ns(IDE_REG_DATA(info->ctrl), buffer, buffer_len/2);
+#else /* __BIG_ENDIAN */
+ insw(IDE_REG_DATA(info->ctrl), buffer, buffer_len/2);
+#endif /* __BIG_ENDIAN */
+
+ status = inb(IDE_REG_STATUS(info->ctrl));
+ if (status & IDE_STATUS_DRQ) {
+ printk_debug("drq after insw\n");
+ print_status(info->ctrl);
return -1;
}
return 0;
@@ -181,6 +306,8 @@ static inline int ide_read_sector_chs(
memset(&cmd, 0, sizeof(cmd));
cmd.sector_count = 1;
+ //printk_debug("ide_read_sector_chs: sector= %ld.\n",sector);
+
track = sector / info->sectors_per_track;
/* Sector number */
offset = 1 + (sector % info->sectors_per_track);
@@ -193,7 +320,11 @@ static inline int ide_read_sector_chs(
info->slave |
IDE_DH_CHS;
cmd.command = IDE_CMD_READ_SECTORS;
+#ifdef __BIG_ENDIAN
+ return pio_data_in_sw(info->ctrl, &cmd, buffer, IDE_SECTOR_SIZE);
+#else /* __BIG_ENDIAN */
return pio_data_in(info->ctrl, &cmd, buffer, IDE_SECTOR_SIZE);
+#endif /* __BIG_ENDIAN */
}
static inline int ide_read_sector_lba(
@@ -211,7 +342,12 @@ static inline int ide_read_sector_lba(
info->slave |
IDE_DH_LBA;
cmd.command = IDE_CMD_READ_SECTORS;
+ //printk_debug("%s: sector= %ld, device command= 0x%x.\n",__FUNCTION__,(unsigned long) sector, cmd.device);
+#ifdef __BIG_ENDIAN
+ return pio_data_in_sw(info->ctrl, &cmd, buffer, IDE_SECTOR_SIZE);
+#else /* __BIG_ENDIAN */
return pio_data_in(info->ctrl, &cmd, buffer, IDE_SECTOR_SIZE);
+#endif /* __BIG_ENDIAN */
}
static inline int ide_read_sector_lba48(
@@ -219,6 +355,7 @@ static inline int ide_read_sector_lba48(
{
struct ide_pio_command cmd;
memset(&cmd, 0, sizeof(cmd));
+ //printk_debug("ide_read_sector_lba48: sector= %ld.\n",(unsigned long) sector);
cmd.sector_count = 1;
cmd.lba_low = sector & 0xff;
@@ -229,31 +366,79 @@ static inline int ide_read_sector_lba48(
cmd.lba_high2 = (sector >> 40) & 0xff;
cmd.device = info->slave | IDE_DH_LBA;
cmd.command = IDE_CMD_READ_SECTORS_EXT;
+#ifdef __BIG_ENDIAN
+ return pio_data_in_sw(info->ctrl, &cmd, buffer, IDE_SECTOR_SIZE);
+#else /* __BIG_ENDIAN */
return pio_data_in(info->ctrl, &cmd, buffer, IDE_SECTOR_SIZE);
+#endif /* __BIG_ENDIAN */
}
-int ide_read(int driveno, unsigned int sector, void *buf)
+static inline int ide_read_sector_packet(
+ struct harddisk_info *info, void *buffer, sector_t sector)
{
- struct harddisk_info *info;
- int result;
+ char packet[12];
+ static uint8_t cdbuffer[CDROM_SECTOR_SIZE];
+ static struct harddisk_info *last_disk = 0;
+ static sector_t last_sector = (sector_t) -1;
+ uint8_t *buf;
+ uint32_t hw_sector;
+
+ //printk_debug("sector=%Ld\n", sector);
+
+ if (info->hw_sector_size == CDROM_SECTOR_SIZE) {
+ buf = cdbuffer;
+ hw_sector = sector >> 2;
+ } else {
+ buf = buffer;
+ hw_sector = sector;
+ }
- if (driveno > NUM_HD-1)
- return -1;
+ if (buf==buffer || info != last_disk || hw_sector != last_sector) {
+ //printk_debug("hw_sector=%u\n", hw_sector);
+ memset(packet, 0, sizeof packet);
+ packet[0] = 0x28; /* READ */
+ packet[2] = hw_sector >> 24;
+ packet[3] = hw_sector >> 16;
+ packet[4] = hw_sector >> 8;
+ packet[5] = hw_sector >> 0;
+ packet[7] = 0;
+ packet[8] = 1; /* length */
+
+ if (pio_packet(info, 1, packet, sizeof packet,
+ buf, info->hw_sector_size) != 0) {
+ printk_debug("read error\n");
+ return -1;
+ }
+ last_disk = info;
+ last_sector = hw_sector;
+ }
- info = &harddisk_info[driveno];
+ if (buf != buffer)
+ memcpy(buffer, &cdbuffer[(sector & 3) << 9], IDE_SECTOR_SIZE);
+ return 0;
+}
+int ide_read(int drive, sector_t sector, void *buffer)
+{
+ struct harddisk_info *info = &harddisk_info[drive];
+ int result;
+
+ //printk_debug("drive=%d, sector=%ld\n",drive,(unsigned long) sector);
/* 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);
+ result = ide_read_sector_chs(info, buffer, sector);
}
else if (info->address_mode == ADDRESS_MODE_LBA) {
- result = ide_read_sector_lba(info, buf, sector);
+ result = ide_read_sector_lba(info, buffer, sector);
}
else if (info->address_mode == ADDRESS_MODE_LBA48) {
- result = ide_read_sector_lba48(info, buf, sector);
+ result = ide_read_sector_lba48(info, buffer, sector);
+ }
+ else if (info->address_mode == ADDRESS_MODE_PACKET) {
+ result = ide_read_sector_packet(info, buffer, sector);
}
else {
result = -1;
@@ -261,11 +446,11 @@ int ide_read(int driveno, unsigned int sector, void *buf)
return result;
}
-static int init_drive(struct harddisk_info *info, struct controller *ctrl, int slave, int drive)
+static int init_drive(struct harddisk_info *info, struct controller *ctrl,
+ int slave, int drive, unsigned char *buffer, int ident_command)
{
uint16_t* drive_info;
struct ide_pio_command cmd;
- unsigned char disk_buffer[DISK_BUFFER_SIZE];
int i;
info->ctrl = ctrl;
@@ -276,15 +461,16 @@ static int init_drive(struct harddisk_info *info, struct controller *ctrl, int s
info->sectors = 0ul;
info->drive_exists = 0;
info->slave_absent = 0;
+ info->removable = 0;
+ info->hw_sector_size = IDE_SECTOR_SIZE;
info->slave = slave?IDE_DH_SLAVE: IDE_DH_MASTER;
- info->basedrive = drive & 1;
- printk_info("Testing for disk %d\n", drive);
+ printk_debug("Testing for hd%c\n", 'a'+drive);
/* 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);
+ mdelay(50);
/* Test to see if the drive registers exist,
* In many cases this quickly rules out a missing drive.
@@ -305,22 +491,19 @@ static int init_drive(struct harddisk_info *info, struct controller *ctrl, int s
return 1;
}
}
-
- printk_info("Probing for disk %d\n", drive);
+ printk_debug("Probing for hd%c\n", 'a'+drive);
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;
+ cmd.command = ident_command;
-
- if (pio_data_in(ctrl, &cmd, disk_buffer, IDE_SECTOR_SIZE) < 0) {
+ if (pio_data_in(ctrl, &cmd, 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;
+ drive_info = (uint16_t *)buffer;
if (drive_info[2] == 0x37C8) {
/* If the response is incomplete spin up the drive... */
memset(&cmd, 0, sizeof(cmd));
@@ -338,8 +521,8 @@ static int init_drive(struct harddisk_info *info, struct controller *ctrl, int s
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) {
+ cmd.command = ident_command;
+ if (pio_data_in(ctrl, &cmd, buffer, IDE_SECTOR_SIZE) < 0) {
/* If the command didn't work give up on the drive. */
return 1;
}
@@ -360,19 +543,23 @@ static int init_drive(struct harddisk_info *info, struct controller *ctrl, int s
info->drive_exists = 1;
/* See if LBA is supported */
- if (drive_info[49] & (1 << 9)) {
+ if (ident_command == IDE_CMD_IDENTIFY_PACKET_DEVICE) {
+ info->address_mode = ADDRESS_MODE_PACKET;
+ info->removable = 1; /* XXX */
+ } else if (drive_info[49] & (1 << 9)) {
info->address_mode = ADDRESS_MODE_LBA;
info->sectors = (drive_info[61] << 16) | (drive_info[60]);
+ printk_debug("LBA mode, sectors=%Ld\n", info->sectors);
/* 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);
+ printk_debug("LBA48 mode, sectors=%Ld\n", info->sectors);
}
} else {
info->address_mode = ADDRESS_MODE_CHS;
@@ -383,16 +570,17 @@ static int init_drive(struct harddisk_info *info, struct controller *ctrl, int s
info->sectors_per_track *
info->heads *
info->cylinders;
- printk_info("%s sectors_per_track=[%d], heads=[%d], cylinders=[%d]\n",
- __FUNCTION__,
+ printk_debug("CHS mode, sectors_per_track=[%d], heads=[%d], cylinders=[%d]\n",
info->sectors_per_track,
info->heads,
info->cylinders);
+ printk_debug("sectors=%Ld\n", info->sectors);
}
/* 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))) {
@@ -407,16 +595,95 @@ static int init_drive(struct harddisk_info *info, struct controller *ctrl, int s
return 1;
}
}
- printk_info("disk%d %dk cap: %hx\n",
- info->basedrive,
- (unsigned long)(info->sectors >> 1),
- drive_info[49]);
+
+ /* Some extra steps for older drives.. */
+ if (info->address_mode != ADDRESS_MODE_PACKET) {
+ /* Initialize drive parameters
+ * This is an obsolete command (disappeared as of ATA-6)
+ * but old drives need it before accessing media. */
+ memset(&cmd, 0, sizeof(cmd));
+ cmd.device = IDE_DH_DEFAULT | IDE_DH_HEAD(drive_info[3] - 1)
+ | info->slave;
+ cmd.sector_count = drive_info[6];
+ cmd.command = IDE_CMD_INITIALIZE_DRIVE_PARAMETERS;
+ printk_debug("Init device params... ");
+ if (pio_non_data(ctrl, &cmd) < 0)
+ printk_debug("failed (ok for newer drives)\n");
+ else
+ printk_debug("ok\n");
+ }
+
+ printk_info("hd%c: %s",
+ 'a'+drive,
+ (info->address_mode==ADDRESS_MODE_CHS) ? "CHS" :
+ (info->address_mode==ADDRESS_MODE_LBA) ? "LBA" :
+ (info->address_mode==ADDRESS_MODE_LBA48) ? "LBA48" :
+ (info->address_mode==ADDRESS_MODE_PACKET) ? "ATAPI" : "???");
+
+ if (info->sectors > (10LL*1000*1000*1000/512))
+ printk_info(" %uGB", (unsigned) (info->sectors / (1000*1000*1000/512)));
+ else if (info->sectors > (10*1000*1000/512))
+ printk_info(" %uMB", (unsigned) (info->sectors / (1000*1000/512)));
+ else if (info->sectors > 0)
+ printk_info(" %uKB", (unsigned) (info->sectors / 2));
+ printk_info(": %s\n", info->model_number);
+
+ return 0;
+}
+
+/* Experimental floating bus detection
+ * As Eric mentions, we get stuck when the bus has no drive
+ * and floating high. To avoid this, try some heuristics.
+ * This is based on a paper on Phoenix website. --ts1 */
+static int ide_bus_floating(struct controller *ctrl)
+{
+ unsigned long timeout;
+ unsigned char status;
+
+ /* Test 1: if status reads 0xff, probably no device is present
+ * on the bus. Repeat this for 20msec. */
+ timeout = 20;
+ status = 0;
+ do {
+ /* Take logical OR to avoid chattering */
+ status |= inb(IDE_REG_STATUS(ctrl));
+ /* If it makes 0xff, it's possible to be floating,
+ * do test2 to ensure. */
+ if (status == 0xff)
+ goto test2;
+ /* If BSY bit is not set, it's harmless to continue probing. */
+ if ((status & IDE_STATUS_BSY) == 0)
+ return 0;
+ udelay(1000);
+ } while (timeout > 0);
+ /* Timed out. Logical ORed status didn't make 0xFF.
+ * We have something there. */
return 0;
+
+test2:
+ /* Test 2: write something to registers, then read back and
+ * compare. Note that ATA spec inhibits this while BSY is set,
+ * but for many drives this works. This is a confirmation step anyway.
+ */
+ outb(0xaa, ctrl->cmd_base + 2);
+ outb(0x55, ctrl->cmd_base + 3);
+ outb(0xff, ctrl->cmd_base + 4);
+ if (inb(ctrl->cmd_base+2) == 0xaa
+ && inb(ctrl->cmd_base+3) == 0x55
+ && inb(ctrl->cmd_base+4) == 0xff) {
+ /* We have some registers there.
+ * Though this does not mean it is not a NIC or something... */
+ return 0;
+ }
+
+ /* Status port is 0xFF, and other registers are not there.
+ * Most certainly this bus is floating. */
+ printk_info("Detected floating bus\n");
+ return 1;
}
-static int init_controller(struct controller *ctrl, int num)
+static int init_controller(struct controller *ctrl, int drive, unsigned char *buffer)
{
- int drive;
struct harddisk_info *info;
/* Put the drives ide channel in a know state and wait
@@ -451,6 +718,10 @@ static int init_controller(struct controller *ctrl, int num)
return -1;
}
#endif
+ /* ts1: Try some heuristics to avoid waiting for floating bus */
+ if (ide_bus_floating(ctrl))
+ return -1;
+
if (ide_software_reset(ctrl) < 0) {
return -1;
}
@@ -465,51 +736,229 @@ static int init_controller(struct controller *ctrl, int num)
*/
/* Now initialize the individual drives */
- drive = num * 2; /* 2 drives per controller */
info = &harddisk_info[drive];
- init_drive(info, ctrl, 0, drive);
-
- /* at the moment this only works for the first drive */
-#if 0
+ init_drive(info, ctrl, 0, drive, buffer, IDE_CMD_IDENTIFY_DEVICE);
+ if (!info->drive_exists)
+ init_drive(info, ctrl, 0, drive, buffer,
+ IDE_CMD_IDENTIFY_PACKET_DEVICE);
if (info->drive_exists && !info->slave_absent) {
drive++;
info++;
- init_drive(info, ctrl, 1, drive);
+ init_drive(info, ctrl, 1, drive, buffer,
+ IDE_CMD_IDENTIFY_DEVICE);
+ if (!info->drive_exists)
+ init_drive(info, ctrl, 1, drive, buffer,
+ IDE_CMD_IDENTIFY_PACKET_DEVICE);
}
-#endif
return 0;
}
-int ide_init(void)
+static int
+atapi_request_sense(struct harddisk_info *info, uint8_t *asc, uint8_t *ascq)
{
- int index;
- int drives = 0;
+ uint8_t packet[12];
+ uint8_t buf[18];
+ int i;
- /* Intialize the harddisk_info structures */
- memset(harddisk_info, 0, sizeof(harddisk_info));
+ memset(packet, 0, sizeof packet);
+ packet[0] = 0x03; /* REQUEST SENSE */
+ packet[4] = sizeof buf;
+ if (pio_packet(info, 1, packet, sizeof packet, buf, sizeof buf) != 0)
+ return -1;
- for(index = 0; index < CONFIG_IDE_MAXBUS; index++) {
- /* IDE normal pci mode */
- uint32_t cmd_base, ctrl_base;
- cmd_base = ide_base[index];
- ctrl_base = cmd_base + IDE_REG_EXTENDED_OFFSET;
- controller.cmd_base = (cmd_base & ~3);
- controller.ctrl_base = (ctrl_base & ~3);
+ for (i = 0; i < sizeof buf; i++)
+ printk_debug("%02x ", buf[i]);
+ printk_debug("\n");
- printk_info("init_controller %d at (%x, %x)\n", index, controller.cmd_base, controller.ctrl_base);
+ if (asc)
+ *asc = buf[12];
+ if (ascq)
+ *ascq = buf[13];
+ return 0;
+}
- if (init_controller(&controller, index) < 0) {
- /* nothing behind the controller */
- continue;
+static int atapi_detect_medium(struct harddisk_info *info)
+{
+ uint8_t packet[12];
+ uint8_t buf[8];
+ uint32_t block_len, sectors;
+ unsigned long timeout;
+ uint8_t asc, ascq;
+ int in_progress;
+
+ memset(packet, 0, sizeof packet);
+ packet[0] = 0x25; /* READ CAPACITY */
+
+ /* Retry READ CAPACITY for 5 seconds unless MEDIUM NOT PRESENT
+ * is reported by the drive. If the drive reports "IN PROGRESS",
+ * 30 seconds is added. */
+ timeout = 5000;
+ in_progress = 0;
+ while (timeout > 0) {
+ if (pio_packet(info, 1, packet, sizeof packet, buf, sizeof buf)
+ == 0)
+ goto ok;
+
+ if (atapi_request_sense(info, &asc, &ascq) == 0) {
+ if (asc == 0x3a) { /* MEDIUM NOT PRESENT */
+ printk_debug("Device reports MEDIUM NOT PRESENT\n");
+ return -1;
+ }
+
+ if (asc == 0x04 && ascq == 0x01 && !in_progress) {
+ /* IN PROGRESS OF BECOMING READY */
+ printk_info("Waiting for drive to detect "
+ "the medium... ");
+ /* Allow 30 seconds more */
+ timeout = 30000;
+ in_progress = 1;
+ }
}
- drives++;
- /*
- * break here to avoid lengthy timeout probing for
- * disks on second controller
- */
- break;
+
+ udelay(1000);
}
+ printk_debug("read capacity failed\n");
+ return -1;
+ok:
+
+ block_len = (uint32_t) buf[4] << 24
+ | (uint32_t) buf[5] << 16
+ | (uint32_t) buf[6] << 8
+ | (uint32_t) buf[7] << 0;
+ printk_debug("block_len=%u\n", block_len);
+ if (block_len != IDE_SECTOR_SIZE && block_len != CDROM_SECTOR_SIZE) {
+ printk_info("Unsupported sector size %u\n", block_len);
+ return -1;
+ }
+ info->hw_sector_size = block_len;
+
+ sectors = (uint32_t) buf[0] << 24
+ | (uint32_t) buf[1] << 16
+ | (uint32_t) buf[2] << 8
+ | (uint32_t) buf[3] << 0;
+
+ printk_debug("sectors=%u\n", sectors);
+ if (info->hw_sector_size == CDROM_SECTOR_SIZE)
+ sectors <<= 2; /* # of sectors in 512-byte "soft" sector */
+ if (sectors != info->sectors)
+ printk_info("%uMB medium detected\n", sectors>>(20-9));
+ info->sectors = sectors;
+ return 0;
+}
- return drives > 0 ? 0 : -1;
+static int detect_medium(struct harddisk_info *info)
+{
+ if (info->address_mode == ADDRESS_MODE_PACKET) {
+ if (atapi_detect_medium(info) != 0)
+ return -1;
+ } else {
+ printk_debug("not implemented for non-ATAPI device\n");
+ return -1;
+ }
+ return 0;
+}
+
+static int find_ide_controller_compat(struct controller *ctrl, int index)
+{
+ if (index >= IDE_MAX_CONTROLLERS)
+ return -1;
+ ctrl->cmd_base = ide_base[index];
+ ctrl->ctrl_base = ide_base[index] + IDE_REG_EXTENDED_OFFSET;
+ return 0;
+}
+
+static int find_ide_controller(struct controller *ctrl, int ctrl_index)
+{
+ int pci_index;
+ struct device *dev = 0;
+ unsigned int mask;
+ unsigned int prog_if;
+
+ /* A PCI IDE controller has two channels (pri, sec) */
+ pci_index = ctrl_index >> 1;
+
+ for (;;) {
+ /* Find a IDE storage class device */
+ dev = dev_find_class(0x010100, dev);
+ if (!dev) {
+ printk_debug("PCI IDE #%d not found\n", pci_index);
+ return -1;
+ }
+
+ if (pci_index-- == 0)
+ break;
+ }
+
+ prog_if = dev->class & 0xff;
+ printk_debug("found PCI IDE controller %04x:%04x prog_if=%#x\n",
+ dev->vendor, dev->device, prog_if);
+
+ /* See how this controller is configured */
+ mask = (ctrl_index & 1) ? 4 : 1;
+ printk_debug("%s channel: ", (ctrl_index & 1) ? "secodary" : "primary");
+ if (prog_if & mask) {
+ printk_debug("native PCI mode\n");
+ if ((ctrl_index & 1) == 0) {
+ /* Primary channel */
+ ctrl->cmd_base = pci_read_config32(dev, PCI_BASE_ADDRESS_0);
+ ctrl->ctrl_base = pci_read_config32(dev, PCI_BASE_ADDRESS_1);
+ } else {
+ /* Secondary channel */
+ ctrl->cmd_base = pci_read_config32(dev, PCI_BASE_ADDRESS_2);
+ ctrl->ctrl_base = pci_read_config32(dev, PCI_BASE_ADDRESS_3);
+ }
+ ctrl->cmd_base &= ~3;
+ ctrl->ctrl_base &= ~3;
+ } else {
+ printk_debug("compatibility mode\n");
+ if (find_ide_controller_compat(ctrl, ctrl_index) != 0)
+ return -1;
+ }
+ printk_debug("cmd_base=%#x ctrl_base=%#x\n", ctrl->cmd_base, ctrl->ctrl_base);
+ return 0;
}
+
+int ide_probe(int drive)
+{
+ struct controller *ctrl;
+ int ctrl_index;
+ struct harddisk_info *info;
+
+ if (drive >= IDE_MAX_DRIVES) {
+ printk_info("Unsupported drive number\n");
+ return -1;
+ }
+
+ /* A controller has two drives (master, slave) */
+ ctrl_index = drive >> 1;
+
+ ctrl = &controllers[ctrl_index];
+ if (ctrl->cmd_base == 0) {
+ if (find_ide_controller(ctrl, ctrl_index) != 0) {
+ printk_info("IDE channel %d not found\n", ctrl_index);
+ return -1;
+ }
+ if (init_controller(ctrl, drive & ~1, ide_buffer) != 0) {
+ printk_info("No drive detected on IDE channel %d\n",
+ ctrl_index);
+ return -1;
+ }
+ }
+ info = &harddisk_info[drive];
+ if (!info->drive_exists) {
+ printk_info("Drive %d does not exist\n", drive);
+ return -1;
+ }
+
+ if (info->removable) {
+ if (detect_medium(info) != 0) {
+ printk_info("Media detection failed\n");
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+/* vim:set sts=8 sw=8: */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-28 06:25:30 +0000