[PATCH] pata_marvell: Marvell 6101/6145 PATA driver

This is a legacy mode PATA driver for the 6101/45 and will also drive
the SATA ports 1 & 2 in legacy mode as well if desired. Tested and
confirmed working by users. The chip supports AHCI type behaviour for
SATA and has a more advanced PATA interface as well so this driver will
get it working but not get best performance for now.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 221 insertions, 0 deletions

diff --git a/drivers/ata/pata_marvell.c b/drivers/ata/pata_marvell.c
new file mode 100644
index 000000000000..2b8e00cb7b9b
--- /dev/null
+++ b/drivers/ata/pata_marvell.c
@@ -0,0 +1,221 @@
+/*
+ *      Marvell PATA driver.
+ *
+ *      For the moment we drive the PATA port in legacy mode. That
+ *      isn't making full use of the device functionality but it is
+ *      easy to get working.
+ *
+ *      (c) 2006 Red Hat  <alan@redhat.com>
+ */
+
+#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 <linux/device.h>
+#include <scsi/scsi_host.h>
+#include <linux/libata.h>
+#include <linux/ata.h>
+
+#define DRV_NAME        "pata_marvell"
+#define DRV_VERSION     "0.0.4t"
+
+/**
+ *      marvell_pre_reset       -       check for 40/80 pin
+ *      @ap: Port
+ *
+ *      Perform the PATA port setup we need.
+ */
+
+static int marvell_pre_reset(struct ata_port *ap)
+{
+        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+        u32 devices;
+        unsigned long bar5;
+        void __iomem *barp;
+        int i;
+
+        /* Check if our port is enabled */
+
+        bar5 = pci_resource_start(pdev, 5);
+        barp = ioremap(bar5, 0x10);
+        if (barp == NULL)
+                return -ENOMEM;
+        printk("BAR5:");
+        for(i = 0; i <= 0x0F; i++)
+                printk("%02X:%02X ", i, readb(barp + i));
+        printk("\n");
+        
+        devices = readl(barp + 0x0C);
+        iounmap(barp);
+        
+        if (pdev->device == 0x6145 && ap->port_no == 0 && !(devices & 0x10))    /* PATA enable ? */
+                return -ENOENT;
+
+        /* Cable type */
+        switch(ap->port_no)
+        {
+                case 0:
+                        /* Might be backward, docs unclear */
+                        if(inb(ap->ioaddr.bmdma_addr + 1) & 1)
+                                ap->cbl = ATA_CBL_PATA80;
+                        else
+                                ap->cbl = ATA_CBL_PATA40;
+                        
+                case 1: /* Legacy SATA port */
+                        ap->cbl = ATA_CBL_SATA;
+                        break;
+        }
+        return ata_std_prereset(ap);
+}
+
+/**
+ *      marvell_error_handler - Setup and error handler
+ *      @ap: Port to handle
+ *
+ *      LOCKING:
+ *      None (inherited from caller).
+ */
+
+static void marvell_error_handler(struct ata_port *ap)
+{
+        return ata_bmdma_drive_eh(ap, marvell_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
+}
+
+/* No PIO or DMA methods needed for this device */
+
+static struct scsi_host_template marvell_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,
+        /* Use standard CHS mapping rules */
+        .bios_param             = ata_std_bios_param,
+};
+
+static const struct ata_port_operations marvell_ops = {
+        .port_disable           = ata_port_disable,
+
+        /* Task file is PCI ATA format, use helpers */
+        .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          = marvell_error_handler,
+        .post_internal_cmd      = ata_bmdma_post_internal_cmd,
+
+        /* BMDMA handling is PCI ATA format, use helpers */
+        .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,
+        .data_xfer              = ata_pio_data_xfer,
+
+        /* Timeout handling */
+        .eng_timeout            = ata_eng_timeout,
+        .irq_handler            = ata_interrupt,
+        .irq_clear              = ata_bmdma_irq_clear,
+
+        /* Generic PATA PCI ATA helpers */
+        .port_start             = ata_port_start,
+        .port_stop              = ata_port_stop,
+        .host_stop              = ata_host_stop,
+};
+
+
+/**
+ *      marvell_init_one - Register Marvell ATA PCI device with kernel services
+ *      @pdev: PCI device to register
+ *      @ent: Entry in marvell_pci_tbl matching with @pdev
+ *
+ *      Called from kernel PCI layer.
+ *
+ *      LOCKING:
+ *      Inherited from PCI layer (may sleep).
+ *
+ *      RETURNS:
+ *      Zero on success, or -ERRNO value.
+ */
+
+static int marvell_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
+{
+        static struct ata_port_info info = {
+                .sht            = &marvell_sht,
+                .flags  = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+
+                .pio_mask       = 0x1f,
+                .mwdma_mask     = 0x07,
+                .udma_mask      = 0x3f,
+
+                .port_ops       = &marvell_ops,
+        };
+        static struct ata_port_info info_sata = {
+                .sht            = &marvell_sht,
+                /* Slave possible as its magically mapped not real */
+                .flags  = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+
+                .pio_mask       = 0x1f,
+                .mwdma_mask     = 0x07,
+                .udma_mask      = 0x7f,
+
+                .port_ops       = &marvell_ops,
+        };
+        struct ata_port_info *port_info[2] = { &info, &info_sata };
+        int n_port = 2;
+        
+        if (pdev->device == 0x6101)
+                n_port = 1;
+        
+        return ata_pci_init_one(pdev, port_info, n_port);
+}
+
+static const struct pci_device_id marvell_pci_tbl[] = {
+        { PCI_DEVICE(0x11AB, 0x6101), },
+        { PCI_DEVICE(0x11AB, 0x6145), },
+        { }     /* terminate list */
+};
+
+static struct pci_driver marvell_pci_driver = {
+        .name                   = DRV_NAME,
+        .id_table               = marvell_pci_tbl,
+        .probe                  = marvell_init_one,
+        .remove                 = ata_pci_remove_one,
+};
+
+static int __init marvell_init(void)
+{
+        return pci_register_driver(&marvell_pci_driver);
+}
+
+static void __exit marvell_exit(void)
+{
+        pci_unregister_driver(&marvell_pci_driver);
+}
+
+module_init(marvell_init);
+module_exit(marvell_exit);
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("SCSI low-level driver for Marvell ATA in legacy mode");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, marvell_pci_tbl);
+MODULE_VERSION(DRV_VERSION);
+