Pull bugzilla-7465 into release branch

[powerpc.git] / drivers / ide / pci / slc90e66.c

diff --git a/drivers/ide/pci/slc90e66.c b/drivers/ide/pci/slc90e66.c
index 2663ddb..852ccb3 100644 (file)
--- a/drivers/ide/pci/slc90e66.c
+++ b/drivers/ide/pci/slc90e66.c
@@ -1,8 +1,8 @@
 /*
- *  linux/drivers/ide/pci/slc90e66.c   Version 0.13    December 30, 2006
+ *  linux/drivers/ide/pci/slc90e66.c   Version 0.14    February 8, 2007
  *
  *  Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
- *  Copyright (C) 2006 MontaVista Software, Inc. <source@mvista.com>
+ *  Copyright (C) 2006-2007 MontaVista Software, Inc. <source@mvista.com>
  *
  * This is a look-alike variation of the ICH0 PIIX4 Ultra-66,
  * but this keeps the ISA-Bridge and slots alive.
@@ -57,11 +57,7 @@ static u8 slc90e66_dma_2_pio (u8 xfer_rate) {
        }
 }
 
-/*
- *  Based on settings done by AMI BIOS
- *  (might be useful if drive is not registered in CMOS for any reason).
- */
-static void slc90e66_tune_drive (ide_drive_t *drive, u8 pio)
+static void slc90e66_tune_pio (ide_drive_t *drive, u8 pio)
 {
        ide_hwif_t *hwif        = HWIF(drive);
        struct pci_dev *dev     = hwif->pci_dev;
@@ -80,7 +76,6 @@ static void slc90e66_tune_drive (ide_drive_t *drive, u8 pio)
                                        { 2, 1 },
                                        { 2, 3 }, };
 
-       pio = ide_get_best_pio_mode(drive, pio, 4, NULL);
        spin_lock_irqsave(&ide_lock, flags);
        pci_read_config_word(dev, master_port, &master_data);
 
@@ -94,19 +89,20 @@ static void slc90e66_tune_drive (ide_drive_t *drive, u8 pio)
                master_data |=  0x4000;
                master_data &= ~0x0070;
                if (pio > 1) {
-                       /* enable PPE, IE and TIME */
-                       master_data = master_data | (control << 4);
+                       /* Set PPE, IE and TIME */
+                       master_data |= control << 4;
                }
                pci_read_config_byte(dev, slave_port, &slave_data);
-               slave_data = slave_data & (hwif->channel ? 0x0f : 0xf0);
-               slave_data = slave_data | (((timings[pio][0] << 2) | timings[pio][1]) << (hwif->channel ? 4 : 0));
+               slave_data &= hwif->channel ? 0x0f : 0xf0;
+               slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) <<
+                              (hwif->channel ? 4 : 0);
        } else {
                master_data &= ~0x3307;
                if (pio > 1) {
                        /* enable PPE, IE and TIME */
-                       master_data = master_data | control;
+                       master_data |= control;
                }
-               master_data = master_data | (timings[pio][0] << 12) | (timings[pio][1] << 8);
+               master_data |= (timings[pio][0] << 12) | (timings[pio][1] << 8);
        }
        pci_write_config_word(dev, master_port, master_data);
        if (is_slave)
@@ -114,6 +110,13 @@ static void slc90e66_tune_drive (ide_drive_t *drive, u8 pio)
        spin_unlock_irqrestore(&ide_lock, flags);
 }
 
+static void slc90e66_tune_drive (ide_drive_t *drive, u8 pio)
+{
+       pio = ide_get_best_pio_mode(drive, pio, 4, NULL);
+       slc90e66_tune_pio(drive, pio);
+       (void) ide_config_drive_speed(drive, XFER_PIO_0 + pio);
+}
+
 static int slc90e66_tune_chipset (ide_drive_t *drive, u8 xferspeed)
 {
        ide_hwif_t *hwif        = HWIF(drive);
@@ -162,8 +165,8 @@ static int slc90e66_tune_chipset (ide_drive_t *drive, u8 xferspeed)
                        pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
        }
 
-       slc90e66_tune_drive(drive, slc90e66_dma_2_pio(speed));
-       return (ide_config_drive_speed(drive, speed));
+       slc90e66_tune_pio(drive, slc90e66_dma_2_pio(speed));
+       return ide_config_drive_speed(drive, speed);
 }
 
 static int slc90e66_config_drive_for_dma (ide_drive_t *drive)
@@ -179,26 +182,15 @@ static int slc90e66_config_drive_for_dma (ide_drive_t *drive)
 
 static int slc90e66_config_drive_xfer_rate (ide_drive_t *drive)
 {
-       ide_hwif_t *hwif        = HWIF(drive);
-       struct hd_driveid *id   = drive->id;
-
        drive->init_speed = 0;
 
-       if ((id->capability & 1) && drive->autodma) {
-
-               if (ide_use_dma(drive) && slc90e66_config_drive_for_dma(drive))
-                       return hwif->ide_dma_on(drive);
+       if (ide_use_dma(drive) && slc90e66_config_drive_for_dma(drive))
+               return 0;
 
-               goto fast_ata_pio;
+       if (ide_use_fast_pio(drive))
+               slc90e66_tune_drive(drive, 255);
 
-       } else if ((id->capability & 8) || (id->field_valid & 2)) {
-fast_ata_pio:
-               (void) hwif->speedproc(drive, XFER_PIO_0 +
-                                      ide_get_best_pio_mode(drive, 255, 4, NULL));
-               return hwif->ide_dma_off_quietly(drive);
-       }
-       /* IORDY not supported */
-       return 0;
+       return -1;
 }
 
 static void __devinit init_hwif_slc90e66 (ide_hwif_t *hwif)