[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, 291 insertions, 0 deletions

diff --git a/drivers/ata/pata_cs5535.c b/drivers/ata/pata_cs5535.c
new file mode 100644
index 000000000000..69d6b4258724
--- /dev/null
+++ b/drivers/ata/pata_cs5535.c
@@ -0,0 +1,291 @@
+/*
+ * pata-cs5535.c        - CS5535 PATA for new ATA layer
+ *                        (C) 2005-2006 Red Hat Inc
+ *                        Alan Cox <alan@redhat.com>
+ *
+ * based upon cs5535.c from AMD <Jens.Altmann@amd.com> as cleaned up and
+ * made readable and Linux style by Wolfgang Zuleger <wolfgang.zuleger@gmx.de
+ * and Alexander Kiausch <alex.kiausch@t-online.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Loosely based on the piix & svwks drivers.
+ *
+ * Documentation:
+ *      Available from AMD web site.
+ * TODO
+ *      Review errata to see if serializing is neccessary
+ */
+
+#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>
+#include <asm/msr.h>
+
+#define DRV_NAME        "cs5535"
+#define DRV_VERSION     "0.2.10"
+
+/*
+ *      The Geode (Aka Athlon GX now) uses an internal MSR based
+ *      bus system for control. Demented but there you go.
+ */
+
+#define MSR_ATAC_BASE           0x51300000
+#define ATAC_GLD_MSR_CAP        (MSR_ATAC_BASE+0)
+#define ATAC_GLD_MSR_CONFIG    (MSR_ATAC_BASE+0x01)
+#define ATAC_GLD_MSR_SMI       (MSR_ATAC_BASE+0x02)
+#define ATAC_GLD_MSR_ERROR     (MSR_ATAC_BASE+0x03)
+#define ATAC_GLD_MSR_PM        (MSR_ATAC_BASE+0x04)
+#define ATAC_GLD_MSR_DIAG      (MSR_ATAC_BASE+0x05)
+#define ATAC_IO_BAR            (MSR_ATAC_BASE+0x08)
+#define ATAC_RESET             (MSR_ATAC_BASE+0x10)
+#define ATAC_CH0D0_PIO         (MSR_ATAC_BASE+0x20)
+#define ATAC_CH0D0_DMA         (MSR_ATAC_BASE+0x21)
+#define ATAC_CH0D1_PIO         (MSR_ATAC_BASE+0x22)
+#define ATAC_CH0D1_DMA         (MSR_ATAC_BASE+0x23)
+#define ATAC_PCI_ABRTERR       (MSR_ATAC_BASE+0x24)
+
+#define ATAC_BM0_CMD_PRIM      0x00
+#define ATAC_BM0_STS_PRIM      0x02
+#define ATAC_BM0_PRD           0x04
+
+#define CS5535_CABLE_DETECT    0x48
+
+#define CS5535_BAD_PIO(timings) ( (timings&~0x80000000UL)==0x00009172 )
+
+/**
+ *      cs5535_pre_reset        -       detect cable type
+ *      @ap: Port to detect on
+ *
+ *      Perform cable detection for ATA66 capable cable. Return a libata
+ *      cable type.
+ */
+
+static int cs5535_pre_reset(struct ata_port *ap)
+{
+        u8 cable;
+        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+
+        pci_read_config_byte(pdev, CS5535_CABLE_DETECT, &cable);
+        if (cable & 1)
+                ap->cbl = ATA_CBL_PATA80;
+        else
+                ap->cbl = ATA_CBL_PATA40;
+        return ata_std_prereset(ap);
+}
+
+/**
+ *      cs5535_error_handler            -       reset/probe
+ *      @ap: Port to reset
+ *
+ *      Reset and configure a port
+ */
+
+static void cs5535_error_handler(struct ata_port *ap)
+{
+        ata_bmdma_drive_eh(ap, cs5535_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
+}
+
+/**
+ *      cs5535_set_piomode              -       PIO setup
+ *      @ap: ATA interface
+ *      @adev: device on the interface
+ *
+ *      Set our PIO requirements. The CS5535 is pretty clean about all this
+ */
+
+static void cs5535_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+        static const u16 pio_timings[5] = {
+                0xF7F4, 0x53F3, 0x13F1, 0x5131, 0x1131
+        };
+        static const u16 pio_cmd_timings[5] = {
+                0xF7F4, 0x53F3, 0x13F1, 0x5131, 0x1131
+        };
+        u32 reg, dummy;
+        struct ata_device *pair = ata_dev_pair(adev);
+
+        int mode = adev->pio_mode - XFER_PIO_0;
+        int cmdmode = mode;
+
+        /* Command timing has to be for the lowest of the pair of devices */
+        if (pair) {
+                int pairmode = pair->pio_mode - XFER_PIO_0;
+                cmdmode = min(mode, pairmode);
+                /* Write the other drive timing register if it changed */
+                if (cmdmode < pairmode)
+                        wrmsr(ATAC_CH0D0_PIO + 2 * pair->devno,
+                                pio_cmd_timings[cmdmode] << 16 | pio_timings[pairmode], 0);
+        }
+        /* Write the drive timing register */
+        wrmsr(ATAC_CH0D0_PIO + 2 * adev->devno,
+                pio_cmd_timings[cmdmode] << 16 | pio_timings[mode], 0);
+
+        /* Set the PIO "format 1" bit in the DMA timing register */
+        rdmsr(ATAC_CH0D0_DMA + 2 * adev->devno, reg, dummy);
+        wrmsr(ATAC_CH0D0_DMA + 2 * adev->devno, reg | 0x80000000UL, 0);
+}
+
+/**
+ *      cs5535_set_dmamode              -       DMA timing setup
+ *      @ap: ATA interface
+ *      @adev: Device being configured
+ *
+ */
+
+static void cs5535_set_dmamode(struct ata_port *ap, struct ata_device *adev)
+{
+        static const u32 udma_timings[5] = {
+                0x7F7436A1, 0x7F733481, 0x7F723261, 0x7F713161, 0x7F703061
+        };
+        static const u32 mwdma_timings[3] = {
+                0x7F0FFFF3, 0x7F035352, 0x7F024241
+        };
+        u32 reg, dummy;
+        int mode = adev->dma_mode;
+
+        rdmsr(ATAC_CH0D0_DMA + 2 * adev->devno, reg, dummy);
+        reg &= 0x80000000UL;
+        if (mode >= XFER_UDMA_0)
+                reg |= udma_timings[mode - XFER_UDMA_0];
+        else
+                reg |= mwdma_timings[mode - XFER_MW_DMA_0];
+        wrmsr(ATAC_CH0D0_DMA + 2 * adev->devno, reg, 0);
+}
+
+static struct scsi_host_template cs5535_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 cs5535_port_ops = {
+        .port_disable   = ata_port_disable,
+        .set_piomode    = cs5535_set_piomode,
+        .set_dmamode    = cs5535_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  = cs5535_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
+};
+
+/**
+ *      cs5535_init_one         -       Initialise a CS5530
+ *      @dev: PCI device
+ *      @id: Entry in match table
+ *
+ *      Install a driver for the newly found CS5530 companion chip. Most of
+ *      this is just housekeeping. We have to set the chip up correctly and
+ *      turn off various bits of emulation magic.
+ */
+
+static int cs5535_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+        static struct ata_port_info info = {
+                .sht = &cs5535_sht,
+                .flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST,
+                .pio_mask = 0x1f,
+                .mwdma_mask = 0x07,
+                .udma_mask = 0x1f,
+                .port_ops = &cs5535_port_ops
+        };
+        struct ata_port_info *ports[1] = { &info };
+
+        u32 timings, dummy;
+
+        /* Check the BIOS set the initial timing clock. If not set the
+           timings for PIO0 */
+        rdmsr(ATAC_CH0D0_PIO, timings, dummy);
+        if (CS5535_BAD_PIO(timings))
+                wrmsr(ATAC_CH0D0_PIO, 0xF7F4F7F4UL, 0);
+        rdmsr(ATAC_CH0D1_PIO, timings, dummy);
+        if (CS5535_BAD_PIO(timings))
+                wrmsr(ATAC_CH0D1_PIO, 0xF7F4F7F4UL, 0);
+        return ata_pci_init_one(dev, ports, 1);
+}
+
+static struct pci_device_id cs5535[] = {
+        { PCI_DEVICE(PCI_VENDOR_ID_NS, 0x002D), },
+        { 0, },
+};
+
+static struct pci_driver cs5535_pci_driver = {
+        .name           = DRV_NAME,
+        .id_table       = cs5535,
+        .probe          = cs5535_init_one,
+        .remove         = ata_pci_remove_one
+};
+
+static int __init cs5535_init(void)
+{
+        return pci_register_driver(&cs5535_pci_driver);
+}
+
+
+static void __exit cs5535_exit(void)
+{
+        pci_unregister_driver(&cs5535_pci_driver);
+}
+
+
+MODULE_AUTHOR("Alan Cox, Jens Altmann, Wolfgan Zuleger, Alexander Kiausch");
+MODULE_DESCRIPTION("low-level driver for the NS/AMD 5530");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, cs5535);
+MODULE_VERSION(DRV_VERSION);
+
+module_init(cs5535_init);
+module_exit(cs5535_exit);