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-rw-r--r--drivers/ata/pata_atiixp.c287
1 files changed, 287 insertions, 0 deletions
diff --git a/drivers/ata/pata_atiixp.c b/drivers/ata/pata_atiixp.c
new file mode 100644
index 0000000..0e2cde8
--- /dev/null
+++ b/drivers/ata/pata_atiixp.c
@@ -0,0 +1,287 @@
+/*
+ * pata_atiixp.c - ATI PATA for new ATA layer
+ * (C) 2005 Red Hat Inc
+ *
+ * Based on
+ *
+ * linux/drivers/ide/pci/atiixp.c Version 0.01-bart2 Feb. 26, 2004
+ *
+ * Copyright (C) 2003 ATI Inc. <hyu@ati.com>
+ * Copyright (C) 2004 Bartlomiej Zolnierkiewicz
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/blkdev.h>
+#include <linux/delay.h>
+#include <scsi/scsi_host.h>
+#include <linux/libata.h>
+
+#define DRV_NAME "pata_atiixp"
+#define DRV_VERSION "0.4.6"
+
+enum {
+ ATIIXP_IDE_PIO_TIMING = 0x40,
+ ATIIXP_IDE_MWDMA_TIMING = 0x44,
+ ATIIXP_IDE_PIO_CONTROL = 0x48,
+ ATIIXP_IDE_PIO_MODE = 0x4a,
+ ATIIXP_IDE_UDMA_CONTROL = 0x54,
+ ATIIXP_IDE_UDMA_MODE = 0x56
+};
+
+static int atiixp_pre_reset(struct ata_link *link, unsigned long deadline)
+{
+ struct ata_port *ap = link->ap;
+ static const struct pci_bits atiixp_enable_bits[] = {
+ { 0x48, 1, 0x01, 0x00 },
+ { 0x48, 1, 0x08, 0x00 }
+ };
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+
+ if (!pci_test_config_bits(pdev, &atiixp_enable_bits[ap->port_no]))
+ return -ENOENT;
+
+ return ata_sff_prereset(link, deadline);
+}
+
+static int atiixp_cable_detect(struct ata_port *ap)
+{
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ u8 udma;
+
+ /* Hack from drivers/ide/pci. Really we want to know how to do the
+ raw detection not play follow the bios mode guess */
+ pci_read_config_byte(pdev, ATIIXP_IDE_UDMA_MODE + ap->port_no, &udma);
+ if ((udma & 0x07) >= 0x04 || (udma & 0x70) >= 0x40)
+ return ATA_CBL_PATA80;
+ return ATA_CBL_PATA40;
+}
+
+/**
+ * atiixp_set_pio_timing - set initial PIO mode data
+ * @ap: ATA interface
+ * @adev: ATA device
+ *
+ * Called by both the pio and dma setup functions to set the controller
+ * timings for PIO transfers. We must load both the mode number and
+ * timing values into the controller.
+ */
+
+static void atiixp_set_pio_timing(struct ata_port *ap, struct ata_device *adev, int pio)
+{
+ static u8 pio_timings[5] = { 0x5D, 0x47, 0x34, 0x22, 0x20 };
+
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ int dn = 2 * ap->port_no + adev->devno;
+
+ /* Check this is correct - the order is odd in both drivers */
+ int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1);
+ u16 pio_mode_data, pio_timing_data;
+
+ pci_read_config_word(pdev, ATIIXP_IDE_PIO_MODE, &pio_mode_data);
+ pio_mode_data &= ~(0x7 << (4 * dn));
+ pio_mode_data |= pio << (4 * dn);
+ pci_write_config_word(pdev, ATIIXP_IDE_PIO_MODE, pio_mode_data);
+
+ pci_read_config_word(pdev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data);
+ pio_timing_data &= ~(0xFF << timing_shift);
+ pio_timing_data |= (pio_timings[pio] << timing_shift);
+ pci_write_config_word(pdev, ATIIXP_IDE_PIO_TIMING, pio_timing_data);
+}
+
+/**
+ * atiixp_set_piomode - set initial PIO mode data
+ * @ap: ATA interface
+ * @adev: ATA device
+ *
+ * Called to do the PIO mode setup. We use a shared helper for this
+ * as the DMA setup must also adjust the PIO timing information.
+ */
+
+static void atiixp_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+ atiixp_set_pio_timing(ap, adev, adev->pio_mode - XFER_PIO_0);
+}
+
+/**
+ * atiixp_set_dmamode - set initial DMA mode data
+ * @ap: ATA interface
+ * @adev: ATA device
+ *
+ * Called to do the DMA mode setup. We use timing tables for most
+ * modes but must tune an appropriate PIO mode to match.
+ */
+
+static void atiixp_set_dmamode(struct ata_port *ap, struct ata_device *adev)
+{
+ static u8 mwdma_timings[5] = { 0x77, 0x21, 0x20 };
+
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ int dma = adev->dma_mode;
+ int dn = 2 * ap->port_no + adev->devno;
+ int wanted_pio;
+
+ if (adev->dma_mode >= XFER_UDMA_0) {
+ u16 udma_mode_data;
+
+ dma -= XFER_UDMA_0;
+
+ pci_read_config_word(pdev, ATIIXP_IDE_UDMA_MODE, &udma_mode_data);
+ udma_mode_data &= ~(0x7 << (4 * dn));
+ udma_mode_data |= dma << (4 * dn);
+ pci_write_config_word(pdev, ATIIXP_IDE_UDMA_MODE, udma_mode_data);
+ } else {
+ u16 mwdma_timing_data;
+ /* Check this is correct - the order is odd in both drivers */
+ int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1);
+
+ dma -= XFER_MW_DMA_0;
+
+ pci_read_config_word(pdev, ATIIXP_IDE_MWDMA_TIMING, &mwdma_timing_data);
+ mwdma_timing_data &= ~(0xFF << timing_shift);
+ mwdma_timing_data |= (mwdma_timings[dma] << timing_shift);
+ pci_write_config_word(pdev, ATIIXP_IDE_MWDMA_TIMING, mwdma_timing_data);
+ }
+ /*
+ * We must now look at the PIO mode situation. We may need to
+ * adjust the PIO mode to keep the timings acceptable
+ */
+ if (adev->dma_mode >= XFER_MW_DMA_2)
+ wanted_pio = 4;
+ else if (adev->dma_mode == XFER_MW_DMA_1)
+ wanted_pio = 3;
+ else if (adev->dma_mode == XFER_MW_DMA_0)
+ wanted_pio = 0;
+ else BUG();
+
+ if (adev->pio_mode != wanted_pio)
+ atiixp_set_pio_timing(ap, adev, wanted_pio);
+}
+
+/**
+ * atiixp_bmdma_start - DMA start callback
+ * @qc: Command in progress
+ *
+ * When DMA begins we need to ensure that the UDMA control
+ * register for the channel is correctly set.
+ *
+ * Note: The host lock held by the libata layer protects
+ * us from two channels both trying to set DMA bits at once
+ */
+
+static void atiixp_bmdma_start(struct ata_queued_cmd *qc)
+{
+ struct ata_port *ap = qc->ap;
+ struct ata_device *adev = qc->dev;
+
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ int dn = (2 * ap->port_no) + adev->devno;
+ u16 tmp16;
+
+ pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
+ if (ata_using_udma(adev))
+ tmp16 |= (1 << dn);
+ else
+ tmp16 &= ~(1 << dn);
+ pci_write_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
+ ata_bmdma_start(qc);
+}
+
+/**
+ * atiixp_dma_stop - DMA stop callback
+ * @qc: Command in progress
+ *
+ * DMA has completed. Clear the UDMA flag as the next operations will
+ * be PIO ones not UDMA data transfer.
+ *
+ * Note: The host lock held by the libata layer protects
+ * us from two channels both trying to set DMA bits at once
+ */
+
+static void atiixp_bmdma_stop(struct ata_queued_cmd *qc)
+{
+ struct ata_port *ap = qc->ap;
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ int dn = (2 * ap->port_no) + qc->dev->devno;
+ u16 tmp16;
+
+ pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
+ tmp16 &= ~(1 << dn);
+ pci_write_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
+ ata_bmdma_stop(qc);
+}
+
+static struct scsi_host_template atiixp_sht = {
+ ATA_BMDMA_SHT(DRV_NAME),
+ .sg_tablesize = LIBATA_DUMB_MAX_PRD,
+};
+
+static struct ata_port_operations atiixp_port_ops = {
+ .inherits = &ata_bmdma_port_ops,
+
+ .qc_prep = ata_sff_dumb_qc_prep,
+ .bmdma_start = atiixp_bmdma_start,
+ .bmdma_stop = atiixp_bmdma_stop,
+
+ .cable_detect = atiixp_cable_detect,
+ .set_piomode = atiixp_set_piomode,
+ .set_dmamode = atiixp_set_dmamode,
+ .prereset = atiixp_pre_reset,
+};
+
+static int atiixp_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+ static const struct ata_port_info info = {
+ .flags = ATA_FLAG_SLAVE_POSS,
+ .pio_mask = 0x1f,
+ .mwdma_mask = 0x06, /* No MWDMA0 support */
+ .udma_mask = 0x3F,
+ .port_ops = &atiixp_port_ops
+ };
+ const struct ata_port_info *ppi[] = { &info, NULL };
+ return ata_pci_sff_init_one(dev, ppi, &atiixp_sht, NULL);
+}
+
+static const struct pci_device_id atiixp[] = {
+ { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP200_IDE), },
+ { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP300_IDE), },
+ { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP400_IDE), },
+ { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP600_IDE), },
+ { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP700_IDE), },
+
+ { },
+};
+
+static struct pci_driver atiixp_pci_driver = {
+ .name = DRV_NAME,
+ .id_table = atiixp,
+ .probe = atiixp_init_one,
+ .remove = ata_pci_remove_one,
+#ifdef CONFIG_PM
+ .resume = ata_pci_device_resume,
+ .suspend = ata_pci_device_suspend,
+#endif
+};
+
+static int __init atiixp_init(void)
+{
+ return pci_register_driver(&atiixp_pci_driver);
+}
+
+
+static void __exit atiixp_exit(void)
+{
+ pci_unregister_driver(&atiixp_pci_driver);
+}
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("low-level driver for ATI IXP200/300/400");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, atiixp);
+MODULE_VERSION(DRV_VERSION);
+
+module_init(atiixp_init);
+module_exit(atiixp_exit);
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