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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2008-04-27 15:38:29 +0200
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2008-04-27 15:38:29 +0200
commitbdffe5d2717c41945d75b488cfaa401d166cb3dd (patch)
treef89fcb95f720a3df77e47e4eead63e15a423806a /drivers/ide
parent0d28ec7f213eee37855741410a95ec559f9fa87a (diff)
cmd640: always auto-tune PIO
* Default to tuning PIO0 and disabling prefetch prior to probing devices for CONFIG_BLK_DEV_CMD640_ENHANCED=y case. * Always auto-tune PIO. * Remove no longer used retrieve_drive_counts(). Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide')
-rw-r--r--drivers/ide/pci/cmd640.c67
1 files changed, 12 insertions, 55 deletions
diff --git a/drivers/ide/pci/cmd640.c b/drivers/ide/pci/cmd640.c
index 6e7a6faa480e..812027ddaafa 100644
--- a/drivers/ide/pci/cmd640.c
+++ b/drivers/ide/pci/cmd640.c
@@ -380,6 +380,7 @@ static void cmd640_dump_regs(void)
}
#endif
+#ifndef CONFIG_BLK_DEV_CMD640_ENHANCED
/*
* Check whether prefetch is on for a drive,
* and initialize the unmask flags for safe operation.
@@ -400,9 +401,7 @@ static void __init check_prefetch(ide_drive_t *drive, unsigned int index)
drive->no_io_32bit = 0;
}
}
-
-#ifdef CONFIG_BLK_DEV_CMD640_ENHANCED
-
+#else
/*
* Sets prefetch mode for a drive.
*/
@@ -459,34 +458,6 @@ static inline u8 pack_nibbles(u8 upper, u8 lower)
}
/*
- * This routine retrieves the initial drive timings from the chipset.
- */
-static void __init retrieve_drive_counts(unsigned int index)
-{
- u8 b;
-
- /*
- * Get the internal setup timing, and convert to clock count
- */
- b = get_cmd640_reg(arttim_regs[index]) & ~0x3f;
- switch (b) {
- case 0x00: b = 4; break;
- case 0x80: b = 3; break;
- case 0x40: b = 2; break;
- default: b = 5; break;
- }
- setup_counts[index] = b;
-
- /*
- * Get the active/recovery counts
- */
- b = get_cmd640_reg(drwtim_regs[index]);
- active_counts[index] = (b >> 4) ? (b >> 4) : 0x10;
- recovery_counts[index] = (b & 0x0f) ? (b & 0x0f) : 0x10;
-}
-
-
-/*
* This routine writes the prepared setup/active/recovery counts
* for a drive into the cmd640 chipset registers to active them.
*/
@@ -683,7 +654,6 @@ static const struct ide_port_info cmd640_port_info __initdata = {
.chipset = ide_cmd640,
.host_flags = IDE_HFLAG_SERIALIZE |
IDE_HFLAG_NO_DMA |
- IDE_HFLAG_NO_AUTOTUNE |
IDE_HFLAG_ABUSE_PREFETCH |
IDE_HFLAG_ABUSE_FAST_DEVSEL,
#ifdef CONFIG_BLK_DEV_CMD640_ENHANCED
@@ -866,29 +836,16 @@ static int __init cmd640x_init(void)
}
#ifdef CONFIG_BLK_DEV_CMD640_ENHANCED
- if (drive->autotune || ((index > 1) && second_port_toggled)) {
- /*
- * Reset timing to the slowest speed and turn off
- * prefetch. This way, the drive identify code has
- * a better chance.
- */
- setup_counts [index] = 4; /* max possible */
- active_counts [index] = 16; /* max possible */
- recovery_counts [index] = 16; /* max possible */
- program_drive_counts(drive, index);
- set_prefetch_mode(drive, index, 0);
- printk("cmd640: drive%d timings/prefetch cleared\n", index);
- } else {
- /*
- * Record timings/prefetch without changing them.
- * This preserves any prior BIOS setup.
- */
- retrieve_drive_counts (index);
- check_prefetch(drive, index);
- printk("cmd640: drive%d timings/prefetch(%s) preserved",
- index, drive->no_io_32bit ? "off" : "on");
- display_clocks(index);
- }
+ /*
+ * Reset timing to the slowest speed and turn off prefetch.
+ * This way, the drive identify code has a better chance.
+ */
+ setup_counts [index] = 4; /* max possible */
+ active_counts [index] = 16; /* max possible */
+ recovery_counts [index] = 16; /* max possible */
+ program_drive_counts(drive, index);
+ set_prefetch_mode(drive, index, 0);
+ printk("cmd640: drive%d timings/prefetch cleared\n", index);
#else
/*
* Set the drive unmask flags to match the prefetch setting