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opti621: program devices timings separately in ->set_pio_mode 

* Set drive->drive_data to 'pio + XFER_PIO_0' instead of 'pio',
  then simplify selecting maximum adress setup timing.

* Remove no longer needed compute_pios() and opti621_port_init_devs().

* Program devices timings separately in ->set_pio_mode.

Based on a bugreport from Juergen Kosel & inspired by pata_opti.c code.

Tested-by: Juergen Kosel <juergen.kosel@gmx.de>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2008-06-15 21:00:22 +02:00
parent 21bd33a656
commit 6c987183fc
1 changed files with 15 additions and 65 deletions
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80
drivers/ide/pci/opti621.c
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@ -115,34 +115,6 @@ static int reg_base;
static DEFINE_SPINLOCK(opti621_lock);
/* there are stored pio numbers from other calls of opti621_set_pio_mode */
static void compute_pios(ide_drive_t *drive, const u8 pio)
/* Store values into drive->drive_data
* second_contr - 0 for primary controller, 1 for secondary
* slave_drive - 0 -> pio is for master, 1 -> pio is for slave
* pio - PIO mode for selected drive (for other we don't know)
*/
{
int d;
ide_hwif_t *hwif = HWIF(drive);
drive->drive_data = pio;
for (d = 0; d < 2; ++d) {
drive = &hwif->drives[d];
if (drive->present) {
if (drive->drive_data == PIO_DONT_KNOW)
drive->drive_data = ide_get_best_pio_mode(drive, 255, 3);
#ifdef OPTI621_DEBUG
printk("%s: Selected PIO mode %d\n",
drive->name, drive->drive_data);
#endif
} else {
drive->drive_data = PIO_NOT_EXIST;
}
}
}
static int cmpt_clk(int time, int bus_speed)
/* Returns (rounded up) time in clocks for time in ns,
* with bus_speed in MHz.
@ -226,20 +198,19 @@ static void compute_clocks(int pio, pio_clocks_t *clks, int bus_speed)
static void opti621_set_pio_mode(ide_drive_t *drive, const u8 pio)
{
/* primary and secondary drives share some registers,
* so we have to program both drives
*/
ide_hwif_t *hwif = drive->hwif;
ide_drive_t *pair = ide_get_paired_drive(drive);
unsigned long flags;
u8 pio1 = 0, pio2 = 0;
pio_clocks_t first, second;
int ax, drdy;
u8 cycle1, cycle2, misc, clk;
ide_hwif_t *hwif = HWIF(drive);
u8 cycle1, misc, clk, addr_pio = pio;
/* sets drive->drive_data for both drives */
compute_pios(drive, pio);
pio1 = hwif->drives[0].drive_data;
pio2 = hwif->drives[1].drive_data;
drive->drive_data = XFER_PIO_0 + pio;
if (pair->present) {
if (pair->drive_data && pair->drive_data < drive->drive_data)
addr_pio = pair->drive_data - XFER_PIO_0;
}
spin_lock_irqsave(&opti621_lock, flags);
@ -259,8 +230,8 @@ static void opti621_set_pio_mode(ide_drive_t *drive, const u8 pio)
printk(KERN_INFO "%s: CLK = %d MHz\n", hwif->name, clk ? 25 : 33);
compute_clocks(pio1, &first, clk ? 25 : 33);
compute_clocks(pio2, &second, clk ? 25 : 33);
compute_clocks(pio, &first, clk ? 25 : 33);
compute_clocks(addr_pio, &second, clk ? 25 : 33);
/* ax = max(a1,a2) */
ax = (first.address_time < second.address_time) ? second.address_time : first.address_time;
@ -268,37 +239,23 @@ static void opti621_set_pio_mode(ide_drive_t *drive, const u8 pio)
drdy = 2; /* DRDY is default 2 (by OPTi Databook) */
cycle1 = ((first.data_time-1)<<4) | (first.recovery_time-2);
cycle2 = ((second.data_time-1)<<4) | (second.recovery_time-2);
misc = ((ax - 1) << 4) | ((drdy - 2) << 1);
#ifdef OPTI621_DEBUG
printk("%s: master: address: %d, data: %d, "
printk("%s: address: %d, data: %d, "
"recovery: %d, drdy: %d [clk]\n",
hwif->name, ax, first.data_time,
drive->name, ax, first.data_time,
first.recovery_time, drdy);
printk("%s: slave: address: %d, data: %d, "
"recovery: %d, drdy: %d [clk]\n",
hwif->name, ax, second.data_time,
second.recovery_time, drdy);
#endif
/* program primary drive */
/* select Index-0 for Register-A */
write_reg(0, MISC_REG);
/* select Index-0/1 for Register-A/B */
write_reg(drive->select.b.unit, MISC_REG);
/* set read cycle timings */
write_reg(cycle1, READ_REG);
/* set write cycle timings */
write_reg(cycle1, WRITE_REG);
/* program secondary drive */
/* select Index-1 for Register-B */
write_reg(1, MISC_REG);
/* set read cycle timings */
write_reg(cycle2, READ_REG);
/* set write cycle timings */
write_reg(cycle2, WRITE_REG);
/* use Register-A for drive 0 */
/* use Register-B for drive 1 */
write_reg(0x85, CNTRL_REG);
@ -310,14 +267,7 @@ static void opti621_set_pio_mode(ide_drive_t *drive, const u8 pio)
spin_unlock_irqrestore(&opti621_lock, flags);
}
static void __devinit opti621_port_init_devs(ide_hwif_t *hwif)
{
hwif->drives[0].drive_data = PIO_DONT_KNOW;
hwif->drives[1].drive_data = PIO_DONT_KNOW;
}
static const struct ide_port_ops opti621_port_ops = {
.port_init_devs = opti621_port_init_devs,
.set_pio_mode = opti621_set_pio_mode,
};