ide: introduce CONFIG_BLK_DEV_IDEDMA_SFF option

[safe/jmp/linux-2.6] / drivers / ide / ide-dma.c

diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
index 782e5da..d0e7b53 100644 (file)
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -1,15 +1,13 @@
 /*
- *  linux/drivers/ide/ide-dma.c                Version 4.10    June 9, 2000
+ *  Copyright (C) 1995-1998   Mark Lord
+ *  Copyright (C) 1999-2000   Andre Hedrick <andre@linux-ide.org>
+ *  Copyright (C) 2004, 2007  Bartlomiej Zolnierkiewicz
  *
- *  Copyright (c) 1999-2000    Andre Hedrick <andre@linux-ide.org>
  *  May be copied or modified under the terms of the GNU General Public License
  */
 
 /*
  *  Special Thanks to Mark for his Six years of work.
- *
- *  Copyright (c) 1995-1998  Mark Lord
- *  May be copied or modified under the terms of the GNU General Public License
  */
 
 /*
@@ -85,6 +83,7 @@
 #include <linux/ide.h>
 #include <linux/delay.h>
 #include <linux/scatterlist.h>
+#include <linux/dma-mapping.h>
 
 #include <asm/io.h>
 #include <asm/irq.h>
@@ -148,7 +147,8 @@ ide_startstop_t ide_dma_intr (ide_drive_t *drive)
        u8 stat = 0, dma_stat = 0;
 
        dma_stat = HWIF(drive)->ide_dma_end(drive);
-       stat = HWIF(drive)->INB(IDE_STATUS_REG);        /* get drive status */
+       stat = ide_read_status(drive);
+
        if (OK_STAT(stat,DRIVE_READY,drive->bad_wstat|DRQ_STAT)) {
                if (!dma_stat) {
                        struct request *rq = HWGROUP(drive)->rq;
@@ -169,36 +169,36 @@ static int ide_dma_good_drive(ide_drive_t *drive)
        return ide_in_drive_list(drive->id, drive_whitelist);
 }
 
-#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
 /**
  *     ide_build_sglist        -       map IDE scatter gather for DMA I/O
  *     @drive: the drive to build the DMA table for
  *     @rq: the request holding the sg list
  *
- *     Perform the PCI mapping magic necessary to access the source or
- *     target buffers of a request via PCI DMA. The lower layers of the
+ *     Perform the DMA mapping magic necessary to access the source or
+ *     target buffers of a request via DMA.  The lower layers of the
  *     kernel provide the necessary cache management so that we can
- *     operate in a portable fashion
+ *     operate in a portable fashion.
  */
 
 int ide_build_sglist(ide_drive_t *drive, struct request *rq)
 {
        ide_hwif_t *hwif = HWIF(drive);
-       struct pci_dev *pdev = to_pci_dev(hwif->dev);
        struct scatterlist *sg = hwif->sg_table;
 
        ide_map_sg(drive, rq);
 
        if (rq_data_dir(rq) == READ)
-               hwif->sg_dma_direction = PCI_DMA_FROMDEVICE;
+               hwif->sg_dma_direction = DMA_FROM_DEVICE;
        else
-               hwif->sg_dma_direction = PCI_DMA_TODEVICE;
+               hwif->sg_dma_direction = DMA_TO_DEVICE;
 
-       return pci_map_sg(pdev, sg, hwif->sg_nents, hwif->sg_dma_direction);
+       return dma_map_sg(hwif->dev, sg, hwif->sg_nents,
+                         hwif->sg_dma_direction);
 }
 
 EXPORT_SYMBOL_GPL(ide_build_sglist);
 
+#ifdef CONFIG_BLK_DEV_IDEDMA_SFF
 /**
  *     ide_build_dmatable      -       build IDE DMA table
  *
@@ -293,6 +293,7 @@ use_pio_instead:
 }
 
 EXPORT_SYMBOL_GPL(ide_build_dmatable);
+#endif
 
 /**
  *     ide_destroy_dmatable    -       clean up DMA mapping
@@ -308,14 +309,14 @@ EXPORT_SYMBOL_GPL(ide_build_dmatable);
 void ide_destroy_dmatable (ide_drive_t *drive)
 {
        ide_hwif_t *hwif = drive->hwif;
-       struct pci_dev *pdev = to_pci_dev(hwif->dev);
 
-       pci_unmap_sg(pdev, hwif->sg_table, hwif->sg_nents,
+       dma_unmap_sg(hwif->dev, hwif->sg_table, hwif->sg_nents,
                     hwif->sg_dma_direction);
 }
 
 EXPORT_SYMBOL_GPL(ide_destroy_dmatable);
 
+#ifdef CONFIG_BLK_DEV_IDEDMA_SFF
 /**
  *     config_drive_for_dma    -       attempt to activate IDE DMA
  *     @drive: the drive to place in DMA mode
@@ -423,7 +424,7 @@ void ide_dma_host_set(ide_drive_t *drive, int on)
 }
 
 EXPORT_SYMBOL_GPL(ide_dma_host_set);
-#endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
+#endif /* CONFIG_BLK_DEV_IDEDMA_SFF  */
 
 /**
  *     ide_dma_off_quietly     -       Generic DMA kill
@@ -473,7 +474,7 @@ void ide_dma_on(ide_drive_t *drive)
        drive->hwif->dma_host_set(drive, 1);
 }
 
-#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
+#ifdef CONFIG_BLK_DEV_IDEDMA_SFF
 /**
  *     ide_dma_setup   -       begin a DMA phase
  *     @drive: target device
@@ -590,7 +591,7 @@ static int __ide_dma_test_irq(ide_drive_t *drive)
 }
 #else
 static inline int config_drive_for_dma(ide_drive_t *drive) { return 0; }
-#endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
+#endif /* CONFIG_BLK_DEV_IDEDMA_SFF */
 
 int __ide_dma_bad_drive (ide_drive_t *drive)
 {
@@ -819,7 +820,27 @@ int ide_set_dma(ide_drive_t *drive)
        return 0;
 }
 
-#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
+void ide_check_dma_crc(ide_drive_t *drive)
+{
+       u8 mode;
+
+       ide_dma_off_quietly(drive);
+       drive->crc_count = 0;
+       mode = drive->current_speed;
+       /*
+        * Don't try non Ultra-DMA modes without iCRC's.  Force the
+        * device to PIO and make the user enable SWDMA/MWDMA modes.
+        */
+       if (mode > XFER_UDMA_0 && mode <= XFER_UDMA_7)
+               mode--;
+       else
+               mode = XFER_PIO_4;
+       ide_set_xfer_rate(drive, mode);
+       if (drive->current_speed >= XFER_SW_DMA_0)
+               ide_dma_on(drive);
+}
+
+#ifdef CONFIG_BLK_DEV_IDEDMA_SFF
 void ide_dma_lost_irq (ide_drive_t *drive)
 {
        printk("%s: DMA interrupt recovery\n", drive->name);
@@ -981,4 +1002,4 @@ void ide_setup_dma(ide_hwif_t *hwif, unsigned long base)
 }
 
 EXPORT_SYMBOL_GPL(ide_setup_dma);
-#endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
+#endif /* CONFIG_BLK_DEV_IDEDMA_SFF */