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@@ -2,6 +2,7 @@
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* linux/drivers/ide/pci/cs5535.c
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*
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* Copyright (C) 2004-2005 Advanced Micro Devices, Inc.
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+ * Copyright (C) 2007 Bartlomiej Zolnierkiewicz
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*
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* History:
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* 09/20/2005 - Jaya Kumar <jayakumar.ide@gmail.com>
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@@ -83,14 +84,17 @@ static void cs5535_set_speed(ide_drive_t *drive, u8 speed)
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/* Set the PIO timings */
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if ((speed & XFER_MODE) == XFER_PIO) {
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- u8 pioa;
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- u8 piob;
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- u8 cmd;
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+ ide_drive_t *pair = &drive->hwif->drives[drive->dn ^ 1];
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+ u8 cmd, pioa;
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- pioa = speed - XFER_PIO_0;
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- piob = ide_get_best_pio_mode(&(drive->hwif->drives[!unit]),
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- 255, 4);
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- cmd = pioa < piob ? pioa : piob;
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+ cmd = pioa = speed - XFER_PIO_0;
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+
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+ if (pair->present) {
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+ u8 piob = ide_get_best_pio_mode(pair, 255, 4);
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+
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+ if (piob < cmd)
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+ cmd = piob;
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+ }
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/* Write the speed of the current drive */
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reg = (cs5535_pio_cmd_timings[cmd] << 16) |
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@@ -116,7 +120,7 @@ static void cs5535_set_speed(ide_drive_t *drive, u8 speed)
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reg &= 0x80000000UL; /* Preserve the PIO format bit */
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- if (speed >= XFER_UDMA_0 && speed <= XFER_UDMA_7)
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+ if (speed >= XFER_UDMA_0 && speed <= XFER_UDMA_4)
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reg |= cs5535_udma_timings[speed - XFER_UDMA_0];
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else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2)
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reg |= cs5535_mwdma_timings[speed - XFER_MW_DMA_0];
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@@ -151,32 +155,22 @@ static int cs5535_set_drive(ide_drive_t *drive, u8 speed)
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*
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* A callback from the upper layers for PIO-only tuning.
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*/
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-static void cs5535_tuneproc(ide_drive_t *drive, u8 xferspeed)
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+static void cs5535_tuneproc(ide_drive_t *drive, u8 pio)
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{
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- u8 modes[] = { XFER_PIO_0, XFER_PIO_1, XFER_PIO_2, XFER_PIO_3,
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- XFER_PIO_4 };
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-
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- /* cs5535 max pio is pio 4, best_pio will check the blacklist.
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- i think we don't need to rate_filter the incoming xferspeed
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- since we know we're only going to choose pio */
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- xferspeed = ide_get_best_pio_mode(drive, xferspeed, 4);
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- ide_config_drive_speed(drive, modes[xferspeed]);
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- cs5535_set_speed(drive, xferspeed);
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+ pio = ide_get_best_pio_mode(drive, pio, 4);
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+ ide_config_drive_speed(drive, XFER_PIO_0 + pio);
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+ cs5535_set_speed(drive, XFER_PIO_0 + pio);
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}
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static int cs5535_dma_check(ide_drive_t *drive)
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{
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- u8 speed;
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-
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drive->init_speed = 0;
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if (ide_tune_dma(drive))
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return 0;
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- if (ide_use_fast_pio(drive)) {
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- speed = ide_get_best_pio_mode(drive, 255, 4);
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- cs5535_set_drive(drive, speed);
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- }
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+ if (ide_use_fast_pio(drive))
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+ cs5535_tuneproc(drive, 255);
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return -1;
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}
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