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author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2008-06-15 21:00:22 +0200 |
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committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2008-06-15 21:00:22 +0200 |
commit | 21bd33a656a60daadc475ce330272f4410ae27b7 (patch) | |
tree | 863d48760628ee3b599e9843307cb4e4efd81ce1 /drivers/ide | |
parent | f361037631ba547ea88adf8d2359d810c1b2605a (diff) | |
download | kernel_samsung_tuna-21bd33a656a60daadc475ce330272f4410ae27b7.zip kernel_samsung_tuna-21bd33a656a60daadc475ce330272f4410ae27b7.tar.gz kernel_samsung_tuna-21bd33a656a60daadc475ce330272f4410ae27b7.tar.bz2 |
opti621: use PCI clock value provided by controller
Use PCI clock value provided by controller instead of depending on
a default (or user supplied) value.
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>
Diffstat (limited to 'drivers/ide')
-rw-r--r-- | drivers/ide/pci/opti621.c | 42 |
1 files changed, 22 insertions, 20 deletions
diff --git a/drivers/ide/pci/opti621.c b/drivers/ide/pci/opti621.c index 65f1807..7547fa2 100644 --- a/drivers/ide/pci/opti621.c +++ b/drivers/ide/pci/opti621.c @@ -193,11 +193,10 @@ typedef struct pio_clocks_s { int recovery_time; /* Recovery time (clocks) */ } pio_clocks_t; -static void compute_clocks(int pio, pio_clocks_t *clks) +static void compute_clocks(int pio, pio_clocks_t *clks, int bus_speed) { if (pio != PIO_NOT_EXIST) { int adr_setup, data_pls; - int bus_speed = ide_pci_clk ? ide_pci_clk : system_bus_clock(); adr_setup = ide_pio_timings[pio].setup_time; data_pls = ide_pio_timings[pio].active_time; @@ -234,7 +233,7 @@ static void opti621_set_pio_mode(ide_drive_t *drive, const u8 pio) u8 pio1 = 0, pio2 = 0; pio_clocks_t first, second; int ax, drdy; - u8 cycle1, cycle2, misc; + u8 cycle1, cycle2, misc, clk; ide_hwif_t *hwif = HWIF(drive); /* sets drive->drive_data for both drives */ @@ -242,8 +241,26 @@ static void opti621_set_pio_mode(ide_drive_t *drive, const u8 pio) pio1 = hwif->drives[0].drive_data; pio2 = hwif->drives[1].drive_data; - compute_clocks(pio1, &first); - compute_clocks(pio2, &second); + spin_lock_irqsave(&opti621_lock, flags); + + reg_base = hwif->io_ports.data_addr; + + /* allow Register-B */ + outb(0xc0, reg_base + CNTRL_REG); + /* hmm, setupvic.exe does this ;-) */ + outb(0xff, reg_base + 5); + /* if reads 0xff, adapter not exist? */ + (void)inb(reg_base + CNTRL_REG); + /* if reads 0xc0, no interface exist? */ + read_reg(CNTRL_REG); + + /* check CLK speed */ + clk = read_reg(STRAP_REG) & 1; + + 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); /* ax = max(a1,a2) */ ax = (first.address_time < second.address_time) ? second.address_time : first.address_time; @@ -266,21 +283,6 @@ static void opti621_set_pio_mode(ide_drive_t *drive, const u8 pio) second.recovery_time, drdy); #endif - spin_lock_irqsave(&opti621_lock, flags); - - reg_base = hwif->io_ports.data_addr; - - /* allow Register-B */ - outb(0xc0, reg_base + CNTRL_REG); - /* hmm, setupvic.exe does this ;-) */ - outb(0xff, reg_base + 5); - /* if reads 0xff, adapter not exist? */ - (void)inb(reg_base + CNTRL_REG); - /* if reads 0xc0, no interface exist? */ - read_reg(CNTRL_REG); - /* read version, probably 0 */ - read_reg(STRAP_REG); - /* program primary drive */ /* select Index-0 for Register-A */ write_reg(0, MISC_REG); |