****************************************************************/
// Wait for the specified ide state
-static int
-await_ide(u8 when_done, u16 base, u16 timeout)
+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);
- u8 result = 0;
- if (when_done == BSY)
- result = status & ATA_CB_STAT_BSY;
- else if (when_done == NOT_BSY)
- result = !(status & ATA_CB_STAT_BSY);
- else if (when_done == NOT_BSY_DRQ)
- result = !(status & ATA_CB_STAT_BSY) && (status & ATA_CB_STAT_DRQ);
- else if (when_done == NOT_BSY_NOT_DRQ)
- result = !(status & ATA_CB_STAT_BSY) && !(status & ATA_CB_STAT_DRQ);
- else if (when_done == NOT_BSY_RDY)
- result = !(status & ATA_CB_STAT_BSY) && (status & ATA_CB_STAT_RDY);
-
- if (result)
+ if ((status & mask) == flags)
return status;
- if (status & ATA_CB_STAT_ERR) {
- dprintf(1, "await_ide: ERROR (TIMEOUT,BSY,!BSY,!BSY_DRQ"
- ",!BSY_!DRQ,!BSY_RDY) %d status=%x timeout=%d\n"
- , when_done, status, timeout);
+ if (rdtscll() >= end) {
+ dprintf(1, "IDE time out\n");
return -1;
}
- if (rdtscll() >= end)
- break;
}
- dprintf(1, "IDE time out\n");
- return -2;
+}
+
+// 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 __always_inline int
-pause_await_ide(u8 when_done, u16 iobase1, u16 iobase2, u16 timeout)
+pause_await_not_bsy(u16 iobase1, u16 iobase2)
{
// Wait one PIO transfer cycle.
inb(iobase2 + ATA_CB_ASTAT);
- return await_ide(when_done, iobase1, timeout);
+ return await_not_bsy(iobase1);
}
// Wait for ide state - pause for 400ns first.
static __always_inline int
-ndelay_await_ide(u8 when_done, u16 iobase1, u16 timeout)
+ndelay_await_not_bsy(u16 iobase1)
{
ndelay(400);
- return await_ide(when_done, iobase1, timeout);
+ return await_not_bsy(iobase1);
}
// Reset a drive
u16 iobase1 = GET_GLOBAL(ATA.channels[channel].iobase1);
u16 iobase2 = GET_GLOBAL(ATA.channels[channel].iobase2);
- // Reset
-
- // 8.2.1 (a) -- set SRST in DC
+ 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);
-
- // 8.2.1 (b) -- wait for BSY
- int status = await_ide(BSY, iobase1, 20);
- dprintf(6, "ata_reset(1) status=%x\n", status);
-
- // 8.2.1 (f) -- clear SRST
+ udelay(5);
outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2+ATA_CB_DC);
+ mdelay(2);
- // 8.2.1 (g) -- check for sc==sn==0x01
- // select device
- outb(slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0, iobase1+ATA_CB_DH);
- mdelay(50);
- u8 sc = inb(iobase1+ATA_CB_SC);
- u8 sn = inb(iobase1+ATA_CB_SN);
-
- // For predetermined ATA drives - wait for ready.
- if (sc==0x01 && sn==0x01) {
- u8 type=GET_GLOBAL(ATA.devices[driveid].type);
- if (type == ATA_TYPE_ATA)
- await_ide(NOT_BSY_RDY, iobase1, IDE_TIMEOUT);
+ // 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;
+ }
+ }
}
- // 8.2.1 (h) -- wait for not BSY
- status = await_ide(NOT_BSY, iobase1, IDE_TIMEOUT);
- dprintf(6, "ata_reset(2) status=%x\n", status);
+ // 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);
}
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);
- int status = inb(iobase1 + ATA_CB_STAT);
- if (status & ATA_CB_STAT_BSY)
- return -3;
-
// Disable interrupts
outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2 + ATA_CB_DC);
// Select device
- u8 device = inb(iobase1 + ATA_CB_DH);
- outb(cmd->device, iobase1 + ATA_CB_DH);
- if ((device ^ cmd->device) & (1 << 4))
- // Wait for device to become active.
- mdelay(50);
+ 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->lba_high, iobase1 + ATA_CB_CH);
outb(cmd->command, iobase1 + ATA_CB_CMD);
- status = ndelay_await_ide(NOT_BSY_DRQ, iobase1, IDE_TIMEOUT);
+ status = ndelay_await_not_bsy(iobase1);
if (status < 0)
return status;
if (status & ATA_CB_STAT_ERR) {
- dprintf(6, "send_cmd : read error\n");
+ 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"
- , (unsigned) status);
+ dprintf(6, "send_cmd : DRQ not set (status %02x)\n", status);
return -5;
}
if (skiplast && current == count-1)
insx_discard(mode, iobase1, skiplast);
- status = pause_await_ide(NOT_BSY, iobase1, iobase2, IDE_TIMEOUT);
+ status = pause_await_not_bsy(iobase1, iobase2);
if (status < 0)
// Error
return status;
SET_EBDA(sector_count, current);
if (current == count)
break;
- status &= (ATA_CB_STAT_BSY | ATA_CB_STAT_RDY | ATA_CB_STAT_DRQ
- | ATA_CB_STAT_ERR);
- if (status != (ATA_CB_STAT_RDY | ATA_CB_STAT_DRQ)) {
+ 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"
- , (unsigned) status);
+ , status);
return -6;
}
}
- status &= (ATA_CB_STAT_BSY | ATA_CB_STAT_RDY | ATA_CB_STAT_DF
- | ATA_CB_STAT_DRQ | ATA_CB_STAT_ERR);
+ 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 != ATA_CB_STAT_RDY ) {
- dprintf(6, "ata_transfer : no sectors left (status %02x)\n"
- , (unsigned) status);
+ if (status != 0) {
+ dprintf(6, "ata_transfer : no sectors left (status %02x)\n", status);
return -7;
}
static noinline int
send_cmd_disk(const struct disk_op_s *op)
{
- u8 slave = op->driveid % 2;
u64 lba = op->lba;
struct ata_pio_command cmd;
cmd.lba_low = lba;
cmd.lba_mid = lba >> 8;
cmd.lba_high = lba >> 16;
- cmd.device = ((slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0)
- | ((lba >> 24) & 0xf) | ATA_CB_DH_LBA);
+ cmd.device = ((lba >> 24) & 0xf) | ATA_CB_DH_LBA;
return send_cmd(op->driveid, &cmd);
}
send_atapi_cmd(int driveid, u8 *cmdbuf, u8 cmdlen, u16 blocksize)
{
u8 channel = driveid / 2;
- u8 slave = driveid % 2;
u16 iobase1 = GET_GLOBAL(ATA.channels[channel].iobase1);
u16 iobase2 = GET_GLOBAL(ATA.channels[channel].iobase2);
cmd.lba_low = 0;
cmd.lba_mid = blocksize;
cmd.lba_high = blocksize >> 8;
- cmd.device = slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0;
+ cmd.device = 0;
cmd.command = ATA_CMD_PACKET;
int ret = send_cmd(driveid, &cmd);
// Send command to device
outsw_fl(iobase1, MAKE_FLATPTR(GET_SEG(SS), cmdbuf), cmdlen / 2);
- int status = pause_await_ide(NOT_BSY_DRQ, iobase1, iobase2, IDE_TIMEOUT);
+ int status = pause_await_not_bsy(iobase1, iobase2);
if (status < 0)
return status;
+ if (status & ATA_CB_STAT_ERR) {
+ dprintf(6, "send_atapi_cmd : read error (status=%02x err=%02x)\n"
+ , status, inb(iobase1 + ATA_CB_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;
}
return version;
}
-static void
+static int
init_drive_atapi(int driveid)
{
- SET_GLOBAL(ATA.devices[driveid].type, ATA_TYPE_ATAPI);
-
- // Temporary values to do the transfer
- SET_GLOBAL(ATA.devices[driveid].device,ATA_DEVICE_CDROM);
- SET_GLOBAL(ATA.devices[driveid].mode, ATA_MODE_PIO16);
-
- // Now we send a IDENTIFY command to ATAPI device
+ // Send an IDENTIFY_DEVICE_PACKET command to device
u8 buffer[0x0200];
memset(buffer, 0, sizeof(buffer));
struct disk_op_s dop;
dop.count = 1;
dop.lba = 1;
dop.buf_fl = MAKE_FLATPTR(GET_SEG(SS), buffer);
- u16 ret = ata_cmd_data(&dop);
- if (ret != 0)
- BX_PANIC("ata-detect: Failed to detect ATAPI device\n");
+ int ret = ata_cmd_data(&dop);
+ if (ret)
+ return ret;
+
+ // Success - setup as ATAPI.
+ SET_GLOBAL(ATA.devices[driveid].type, ATA_TYPE_ATAPI);
u8 type = buffer[1] & 0x1f;
u8 removable = (buffer[0] & 0x80) ? 1 : 0;
printf(" ATAPI-%d CD-Rom/DVD-Rom\n", version);
else
printf(" ATAPI-%d Device\n", version);
+
+ return 0;
}
static void
SET_GLOBAL(ATA.devices[driveid].lchs.spt, spt);
}
-static void
+static int
init_drive_ata(int driveid)
{
- SET_GLOBAL(ATA.devices[driveid].type, ATA_TYPE_ATA);
-
- // Temporary values to do the transfer
- SET_GLOBAL(ATA.devices[driveid].device, ATA_DEVICE_HD);
- SET_GLOBAL(ATA.devices[driveid].mode, ATA_MODE_PIO16);
-
- // Now we send a IDENTIFY command to ATA device
+ // Send an IDENTIFY_DEVICE command to device
u8 buffer[0x0200];
memset(buffer, 0, sizeof(buffer));
struct disk_op_s dop;
dop.count = 1;
dop.lba = 1;
dop.buf_fl = MAKE_FLATPTR(GET_SEG(SS), buffer);
- u16 ret = ata_cmd_data(&dop);
+ int ret = ata_cmd_data(&dop);
if (ret)
- BX_PANIC("ata-detect: Failed to detect ATA device\n");
+ return ret;
+
+ // Success - setup as ATA.
+ SET_GLOBAL(ATA.devices[driveid].type, ATA_TYPE_ATA);
u8 removable = (buffer[0] & 0x80) ? 1 : 0;
u8 mode = buffer[48*2] ? ATA_MODE_PIO32 : ATA_MODE_PIO16;
else
printf(" ATA-%d Hard-Disk (%u GiBytes)\n", version
, (u32)(sizeinmb >> 10));
-}
-static void
-init_drive_unknown(int driveid)
-{
- SET_GLOBAL(ATA.devices[driveid].type, ATA_TYPE_UNKNOWN);
-
- u8 channel = driveid / 2;
- u8 slave = driveid % 2;
- printf("ata%d %s: Unknown device\n", channel, slave ? " slave" : "master");
+ return 0;
}
static void
ata_detect()
{
// Device detection
- int driveid;
+ int driveid, last_reset_driveid;
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);
- u16 iobase2 = GET_GLOBAL(ATA.channels[channel].iobase2);
if (!iobase1)
break;
- // Disable interrupts
- outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2+ATA_CB_DC);
-
// Look for device
outb(slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0, iobase1+ATA_CB_DH);
- mdelay(50);
outb(0x55, iobase1+ATA_CB_SC);
outb(0xaa, iobase1+ATA_CB_SN);
outb(0xaa, iobase1+ATA_CB_SC);
outb(0x55, iobase1+ATA_CB_SC);
outb(0xaa, iobase1+ATA_CB_SN);
- // If we found something
+ // Check if ioport registers look valid.
u8 sc = inb(iobase1+ATA_CB_SC);
u8 sn = inb(iobase1+ATA_CB_SN);
- dprintf(6, "ata_detect(1) drive=%d sc=%x sn=%x\n", driveid, sc, sn);
-
+ dprintf(6, "ata_detect drive=%d sc=%x sn=%x\n", driveid, sc, sn);
if (sc != 0x55 || sn != 0xaa)
continue;
// reset the channel
- ata_reset(driveid);
+ 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 ATA or ATAPI
- outb(slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0, iobase1+ATA_CB_DH);
- mdelay(50);
- sc = inb(iobase1+ATA_CB_SC);
- sn = inb(iobase1+ATA_CB_SN);
- dprintf(6, "ata_detect(2) drive=%d sc=%x sn=%x\n", driveid, sc, sn);
- if (sc!=0x01 || sn!=0x01) {
- init_drive_unknown(driveid);
+ // check for ATAPI
+ int ret = init_drive_atapi(driveid);
+ if (!ret)
+ // Found an ATAPI drive.
continue;
- }
- u8 cl = inb(iobase1+ATA_CB_CL);
- u8 ch = inb(iobase1+ATA_CB_CH);
+
u8 st = inb(iobase1+ATA_CB_STAT);
- dprintf(6, "ata_detect(3) drive=%d sc=%x sn=%x cl=%x ch=%x st=%x\n"
- , driveid, sc, sn, cl, ch, st);
-
- if (cl==0x14 && ch==0xeb)
- init_drive_atapi(driveid);
- else if (cl==0x00 && ch==0x00 && st!=0x00)
- init_drive_ata(driveid);
- else if (cl==0xff && ch==0xff)
- // None
+ if (!st)
+ // Status not set - can't be a valid drive.
continue;
- else
- init_drive_unknown(driveid);
+
+ // Wait for RDY.
+ ret = await_rdy(iobase1);
+ if (ret < 0)
+ continue;
+
+ // check for ATA.
+ init_drive_ata(driveid);
}
printf("\n");
projects / seabios.git / commitdiff