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Date: Sat, 16 Feb 2008 21:26:47 +0100
From: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To: linux-ide@...r.kernel.org
Cc: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
linux-kernel@...r.kernel.org
Subject: [PATCH 3/9] cmd640: remove cmd_drives[]
* Pass 'ide_drive_t *drive' to check_prefetch(), set_prefetch_mode(),
program_drive_counts() and cmd640_set_mode().
* Remove no longer needed cmd_drives[].
* Inline setup_device_ptrs() helper in cmd640x_init().
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
---
drivers/ide/pci/cmd640.c | 67 ++++++++++++++++++-----------------------------
1 file changed, 27 insertions(+), 40 deletions(-)
Index: b/drivers/ide/pci/cmd640.c
===================================================================
--- a/drivers/ide/pci/cmd640.c
+++ b/drivers/ide/pci/cmd640.c
@@ -185,7 +185,6 @@ static DEFINE_SPINLOCK(cmd640_lock);
* These are initialized to point at the devices we control
*/
static ide_hwif_t *cmd_hwif0, *cmd_hwif1;
-static ide_drive_t *cmd_drives[4];
/*
* Interface to access cmd640x registers
@@ -386,9 +385,8 @@ static void cmd640_dump_regs (void)
* Check whether prefetch is on for a drive,
* and initialize the unmask flags for safe operation.
*/
-static void __init check_prefetch (unsigned int index)
+static void __init check_prefetch(ide_drive_t *drive, unsigned int index)
{
- ide_drive_t *drive = cmd_drives[index];
u8 b = get_cmd640_reg(prefetch_regs[index]);
if (b & prefetch_masks[index]) { /* is prefetch off? */
@@ -404,28 +402,13 @@ static void __init check_prefetch (unsig
}
}
-/*
- * Figure out which devices we control
- */
-static void __init setup_device_ptrs (void)
-{
- cmd_hwif0 = &ide_hwifs[0];
- cmd_hwif1 = &ide_hwifs[1];
-
- cmd_drives[0] = &cmd_hwif0->drives[0];
- cmd_drives[1] = &cmd_hwif0->drives[1];
- cmd_drives[2] = &cmd_hwif1->drives[0];
- cmd_drives[3] = &cmd_hwif1->drives[1];
-}
-
#ifdef CONFIG_BLK_DEV_CMD640_ENHANCED
/*
* Sets prefetch mode for a drive.
*/
-static void set_prefetch_mode (unsigned int index, int mode)
+static void set_prefetch_mode(ide_drive_t *drive, unsigned int index, int mode)
{
- ide_drive_t *drive = cmd_drives[index];
unsigned long flags;
int reg = prefetch_regs[index];
u8 b;
@@ -508,7 +491,7 @@ static void __init retrieve_drive_counts
* This routine writes the prepared setup/active/recovery counts
* for a drive into the cmd640 chipset registers to active them.
*/
-static void program_drive_counts (unsigned int index)
+static void program_drive_counts(ide_drive_t *drive, unsigned int index)
{
unsigned long flags;
u8 setup_count = setup_counts[index];
@@ -522,8 +505,11 @@ static void program_drive_counts (unsign
* so we merge the timings, using the slowest value for each timing.
*/
if (index > 1) {
- unsigned int mate;
- if (cmd_drives[mate = index ^ 1]->present) {
+ ide_hwif_t *hwif = drive->hwif;
+ ide_drive_t *peer = &hwif->drives[!drive->select.b.unit];
+ unsigned int mate = index ^ 1;
+
+ if (peer->present) {
if (setup_count < setup_counts[mate])
setup_count = setup_counts[mate];
if (active_count < active_counts[mate])
@@ -562,7 +548,8 @@ static void program_drive_counts (unsign
/*
* Set a specific pio_mode for a drive
*/
-static void cmd640_set_mode (unsigned int index, u8 pio_mode, unsigned int cycle_time)
+static void cmd640_set_mode(ide_drive_t *drive, unsigned int index,
+ u8 pio_mode, unsigned int cycle_time)
{
int setup_time, active_time, recovery_time, clock_time;
u8 setup_count, active_count, recovery_count, recovery_count2, cycle_count;
@@ -611,7 +598,7 @@ static void cmd640_set_mode (unsigned in
* 1) this is the wrong place to do it (proper is do_special() in ide.c)
* 2) in practice this is rarely, if ever, necessary
*/
- program_drive_counts (index);
+ program_drive_counts(drive, index);
}
static void cmd640_set_pio_mode(ide_drive_t *drive, const u8 pio)
@@ -619,13 +606,6 @@ static void cmd640_set_pio_mode(ide_driv
unsigned int index = 0, cycle_time;
u8 b;
- while (drive != cmd_drives[index]) {
- if (++index > 3) {
- printk(KERN_ERR "%s: bad news in %s\n",
- drive->name, __FUNCTION__);
- return;
- }
- }
switch (pio) {
case 6: /* set fast-devsel off */
case 7: /* set fast-devsel on */
@@ -638,13 +618,13 @@ static void cmd640_set_pio_mode(ide_driv
case 8: /* set prefetch off */
case 9: /* set prefetch on */
- set_prefetch_mode(index, pio & 1);
+ set_prefetch_mode(drive, index, pio & 1);
printk("%s: %sabled cmd640 prefetch\n", drive->name, (pio & 1) ? "en" : "dis");
return;
}
cycle_time = ide_pio_cycle_time(drive, pio);
- cmd640_set_mode(index, pio, cycle_time);
+ cmd640_set_mode(drive, index, pio, cycle_time);
printk("%s: selected cmd640 PIO mode%d (%dns)",
drive->name, pio, cycle_time);
@@ -764,11 +744,12 @@ static int __init cmd640x_init(void)
printk(KERN_INFO "cmd640: buggy cmd640%c interface on %s, config=0x%02x"
"\n", 'a' + cmd640_chip_version - 1, bus_type, cfr);
+ cmd_hwif0 = &ide_hwifs[0];
+ cmd_hwif1 = &ide_hwifs[1];
+
/*
* Initialize data for primary port
*/
- setup_device_ptrs ();
-
oldnoprobe = cmd_hwif0->noprobe;
ide_init_port_hw(cmd_hwif0, &hw[0]);
cmd_hwif0->noprobe = oldnoprobe;
@@ -840,7 +821,13 @@ static int __init cmd640x_init(void)
* Do not unnecessarily disturb any prior BIOS setup of these.
*/
for (index = 0; index < (2 + (second_port_cmd640 << 1)); index++) {
- ide_drive_t *drive = cmd_drives[index];
+ ide_drive_t *drive;
+
+ if (index > 1)
+ drive = &cmd_hwif1->drives[index & 1];
+ else
+ drive = &cmd_hwif0->drives[index & 1];
+
#ifdef CONFIG_BLK_DEV_CMD640_ENHANCED
if (drive->autotune || ((index > 1) && second_port_toggled)) {
/*
@@ -850,8 +837,8 @@ static int __init cmd640x_init(void)
setup_counts [index] = 4; /* max possible */
active_counts [index] = 16; /* max possible */
recovery_counts [index] = 16; /* max possible */
- program_drive_counts (index);
- set_prefetch_mode (index, 0);
+ program_drive_counts(drive, index);
+ set_prefetch_mode(drive, index, 0);
printk("cmd640: drive%d timings/prefetch cleared\n", index);
} else {
/*
@@ -859,7 +846,7 @@ static int __init cmd640x_init(void)
* This preserves any prior BIOS setup.
*/
retrieve_drive_counts (index);
- check_prefetch (index);
+ check_prefetch(drive, index);
printk("cmd640: drive%d timings/prefetch(%s) preserved",
index, drive->no_io_32bit ? "off" : "on");
display_clocks(index);
@@ -868,7 +855,7 @@ static int __init cmd640x_init(void)
/*
* Set the drive unmask flags to match the prefetch setting
*/
- check_prefetch (index);
+ check_prefetch(drive, index);
printk("cmd640: drive%d timings/prefetch(%s) preserved\n",
index, drive->no_io_32bit ? "off" : "on");
#endif /* CONFIG_BLK_DEV_CMD640_ENHANCED */
--
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