diff options
Diffstat (limited to 'drivers/ide')
| -rw-r--r-- | drivers/ide/pci/cs5535.c | 40 |
1 files changed, 17 insertions, 23 deletions
diff --git a/drivers/ide/pci/cs5535.c b/drivers/ide/pci/cs5535.c index 9bd526db03cf..082ca7da2cbc 100644 --- a/drivers/ide/pci/cs5535.c +++ b/drivers/ide/pci/cs5535.c @@ -2,6 +2,7 @@ * linux/drivers/ide/pci/cs5535.c * * Copyright (C) 2004-2005 Advanced Micro Devices, Inc. + * Copyright (C) 2007 Bartlomiej Zolnierkiewicz * * History: * 09/20/2005 - Jaya Kumar <jayakumar.ide@gmail.com> @@ -83,14 +84,17 @@ static void cs5535_set_speed(ide_drive_t *drive, u8 speed) /* Set the PIO timings */ if ((speed & XFER_MODE) == XFER_PIO) { - u8 pioa; - u8 piob; - u8 cmd; + ide_drive_t *pair = &drive->hwif->drives[drive->dn ^ 1]; + u8 cmd, pioa; - pioa = speed - XFER_PIO_0; - piob = ide_get_best_pio_mode(&(drive->hwif->drives[!unit]), - 255, 4); - cmd = pioa < piob ? pioa : piob; + cmd = pioa = speed - XFER_PIO_0; + + if (pair->present) { + u8 piob = ide_get_best_pio_mode(pair, 255, 4); + + if (piob < cmd) + cmd = piob; + } /* Write the speed of the current drive */ reg = (cs5535_pio_cmd_timings[cmd] << 16) | @@ -151,32 +155,22 @@ static int cs5535_set_drive(ide_drive_t *drive, u8 speed) * * A callback from the upper layers for PIO-only tuning. */ -static void cs5535_tuneproc(ide_drive_t *drive, u8 xferspeed) +static void cs5535_tuneproc(ide_drive_t *drive, u8 pio) { - u8 modes[] = { XFER_PIO_0, XFER_PIO_1, XFER_PIO_2, XFER_PIO_3, - XFER_PIO_4 }; - - /* cs5535 max pio is pio 4, best_pio will check the blacklist. - i think we don't need to rate_filter the incoming xferspeed - since we know we're only going to choose pio */ - xferspeed = ide_get_best_pio_mode(drive, xferspeed, 4); - ide_config_drive_speed(drive, modes[xferspeed]); - cs5535_set_speed(drive, xferspeed); + pio = ide_get_best_pio_mode(drive, pio, 4); + ide_config_drive_speed(drive, XFER_PIO_0 + pio); + cs5535_set_speed(drive, XFER_PIO_0 + pio); } static int cs5535_dma_check(ide_drive_t *drive) { - u8 speed; - drive->init_speed = 0; if (ide_tune_dma(drive)) return 0; - if (ide_use_fast_pio(drive)) { - speed = ide_get_best_pio_mode(drive, 255, 4); - cs5535_set_drive(drive, speed); - } + if (ide_use_fast_pio(drive)) + cs5535_tuneproc(drive, 255); return -1; } |