[libata] Add a bunch of PATA drivers.

The vast majority of drivers and changes are from Alan Cox.  Albert Lee
contributed and maintains pata_pdc2027x.  Adrian Bunk, Andrew Morton,
and Tejun Heo contributed various minor fixes and updates.

Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 226 insertions, 0 deletions

diff --git a/drivers/ata/pata_hpt3x3.c b/drivers/ata/pata_hpt3x3.c
new file mode 100644
index 000000000000..c93406ebf6ed
--- /dev/null
+++ b/drivers/ata/pata_hpt3x3.c
@@ -0,0 +1,226 @@
+/*
+ *      pata_hpt3x3             -       HPT3x3 driver
+ *      (c) Copyright 2005-2006 Red Hat
+ *
+ *      Was pata_hpt34x but the naming was confusing as it supported the
+ *      343 and 363 so it has been renamed.
+ *
+ *      Based on:
+ *      linux/drivers/ide/pci/hpt34x.c          Version 0.40    Sept 10, 2002
+ *      Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
+ *
+ *      May be copied or modified under the terms of the GNU General Public
+ *      License
+ */
+ 
+#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_hpt3x3"
+#define DRV_VERSION     "0.4.1"
+
+static int hpt3x3_probe_init(struct ata_port *ap)
+{
+        ap->cbl = ATA_CBL_PATA40;
+        return ata_std_prereset(ap);
+}
+
+/**
+ *      hpt3x3_probe_reset      -       reset the hpt3x3 bus
+ *      @ap: ATA port to reset
+ *
+ *      Perform the housekeeping when doing an ATA bus reeset. We just
+ *      need to force the cable type.
+ */
+
+static void hpt3x3_error_handler(struct ata_port *ap)
+{
+        return ata_bmdma_drive_eh(ap, hpt3x3_probe_init, ata_std_softreset, NULL, ata_std_postreset);
+}
+
+/**
+ *      hpt3x3_set_piomode              -       PIO setup
+ *      @ap: ATA interface
+ *      @adev: device on the interface
+ *
+ *      Set our PIO requirements. This is fairly simple on the HPT3x3 as
+ *      all we have to do is clear the MWDMA and UDMA bits then load the
+ *      mode number.
+ */
+
+static void hpt3x3_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+        u32 r1, r2;
+        int dn = 2 * ap->port_no + adev->devno;
+
+        pci_read_config_dword(pdev, 0x44, &r1);
+        pci_read_config_dword(pdev, 0x48, &r2);
+        /* Load the PIO timing number */
+        r1 &= ~(7 << (3 * dn));
+        r1 |= (adev->pio_mode - XFER_PIO_0) << (3 * dn);
+        r2 &= ~(0x11 << dn);    /* Clear MWDMA and UDMA bits */
+
+        pci_write_config_dword(pdev, 0x44, r1);
+        pci_write_config_dword(pdev, 0x48, r2);
+}
+
+/**
+ *      hpt3x3_set_dmamode              -       DMA timing setup
+ *      @ap: ATA interface
+ *      @adev: Device being configured
+ *
+ *      Set up the channel for MWDMA or UDMA modes. Much the same as with
+ *      PIO, load the mode number and then set MWDMA or UDMA flag.
+ */
+
+static void hpt3x3_set_dmamode(struct ata_port *ap, struct ata_device *adev)
+{
+        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+        u32 r1, r2;
+        int dn = 2 * ap->port_no + adev->devno;
+        int mode_num = adev->dma_mode & 0x0F;
+
+        pci_read_config_dword(pdev, 0x44, &r1);
+        pci_read_config_dword(pdev, 0x48, &r2);
+        /* Load the timing number */
+        r1 &= ~(7 << (3 * dn));
+        r1 |= (mode_num << (3 * dn));
+        r2 &= ~(0x11 << dn);    /* Clear MWDMA and UDMA bits */
+
+        if (adev->dma_mode >= XFER_UDMA_0)
+                r2 |= 0x01 << dn;       /* Ultra mode */
+        else
+                r2 |= 0x10 << dn;       /* MWDMA */
+
+        pci_write_config_dword(pdev, 0x44, r1);
+        pci_write_config_dword(pdev, 0x48, r2);
+}
+
+static struct scsi_host_template hpt3x3_sht = {
+        .module                 = THIS_MODULE,
+        .name                   = DRV_NAME,
+        .ioctl                  = ata_scsi_ioctl,
+        .queuecommand           = ata_scsi_queuecmd,
+        .can_queue              = ATA_DEF_QUEUE,
+        .this_id                = ATA_SHT_THIS_ID,
+        .sg_tablesize           = LIBATA_MAX_PRD,
+        .max_sectors            = ATA_MAX_SECTORS,
+        .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
+        .emulated               = ATA_SHT_EMULATED,
+        .use_clustering         = ATA_SHT_USE_CLUSTERING,
+        .proc_name              = DRV_NAME,
+        .dma_boundary           = ATA_DMA_BOUNDARY,
+        .slave_configure        = ata_scsi_slave_config,
+        .bios_param             = ata_std_bios_param,
+};
+
+static struct ata_port_operations hpt3x3_port_ops = {
+        .port_disable   = ata_port_disable,
+        .set_piomode    = hpt3x3_set_piomode,
+        .set_dmamode    = hpt3x3_set_dmamode,
+        .mode_filter    = ata_pci_default_filter,
+
+        .tf_load        = ata_tf_load,
+        .tf_read        = ata_tf_read,
+        .check_status   = ata_check_status,
+        .exec_command   = ata_exec_command,
+        .dev_select     = ata_std_dev_select,
+
+        .freeze         = ata_bmdma_freeze,
+        .thaw           = ata_bmdma_thaw,
+        .error_handler  = hpt3x3_error_handler,
+        .post_internal_cmd = ata_bmdma_post_internal_cmd,
+
+        .bmdma_setup    = ata_bmdma_setup,
+        .bmdma_start    = ata_bmdma_start,
+        .bmdma_stop     = ata_bmdma_stop,
+        .bmdma_status   = ata_bmdma_status,
+
+        .qc_prep        = ata_qc_prep,
+        .qc_issue       = ata_qc_issue_prot,
+        .eng_timeout    = ata_eng_timeout,
+        .data_xfer      = ata_pio_data_xfer,
+
+        .irq_handler    = ata_interrupt,
+        .irq_clear      = ata_bmdma_irq_clear,
+
+        .port_start     = ata_port_start,
+        .port_stop      = ata_port_stop,
+        .host_stop      = ata_host_stop
+};
+
+/**
+ *      hpt3x3_init_one         -       Initialise an HPT343/363
+ *      @dev: PCI device
+ *      @id: Entry in match table
+ *
+ *      Perform basic initialisation. The chip has a quirk that it won't
+ *      function unless it is at XX00. The old ATA driver touched this up
+ *      but we leave it for pci quirks to do properly.
+ */
+
+static int hpt3x3_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+        static struct ata_port_info info = {
+                .sht = &hpt3x3_sht,
+                .flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST,
+                .pio_mask = 0x1f,
+                .mwdma_mask = 0x07,
+                .udma_mask = 0x07,
+                .port_ops = &hpt3x3_port_ops
+        };
+        static struct ata_port_info *port_info[2] = { &info, &info };
+        u16 cmd;
+
+        /* Initialize the board */
+        pci_write_config_word(dev, 0x80, 0x00);
+        /* Check if it is a 343 or a 363. 363 has COMMAND_MEMORY set */
+        pci_read_config_word(dev, PCI_COMMAND, &cmd);
+        if (cmd & PCI_COMMAND_MEMORY)
+                pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0xF0);
+        else
+                pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x20);
+
+        /* Now kick off ATA set up */
+        return ata_pci_init_one(dev, port_info, 2);
+}
+
+static struct pci_device_id hpt3x3[] = {
+        { PCI_DEVICE(PCI_VENDOR_ID_TTI, PCI_DEVICE_ID_TTI_HPT343), },
+        { 0, },
+};
+
+static struct pci_driver hpt3x3_pci_driver = {
+        .name           = DRV_NAME,
+        .id_table       = hpt3x3,
+        .probe          = hpt3x3_init_one,
+        .remove         = ata_pci_remove_one
+};
+
+static int __init hpt3x3_init(void)
+{
+        return pci_register_driver(&hpt3x3_pci_driver);
+}
+
+
+static void __exit hpt3x3_exit(void)
+{
+        pci_unregister_driver(&hpt3x3_pci_driver);
+}
+
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("low-level driver for the Highpoint HPT343/363");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, hpt3x3);
+MODULE_VERSION(DRV_VERSION);
+
+module_init(hpt3x3_init);
+module_exit(hpt3x3_exit);