[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, 227 insertions, 0 deletions

diff --git a/drivers/ata/pata_cypress.c b/drivers/ata/pata_cypress.c
new file mode 100644
index 000000000000..322043d8cf7f
--- /dev/null
+++ b/drivers/ata/pata_cypress.c
@@ -0,0 +1,227 @@
+/*
+ * pata_cypress.c       - Cypress PATA for new ATA layer
+ *                        (C) 2006 Red Hat Inc
+ *                        Alan Cox <alan@redhat.com>
+ *
+ * Based heavily on
+ * linux/drivers/ide/pci/cy82c693.c             Version 0.40    Sep. 10, 2002
+ *
+ */
+ 
+#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_cypress"
+#define DRV_VERSION "0.1.2"
+
+/* here are the offset definitions for the registers */
+
+enum {
+        CY82_IDE_CMDREG         = 0x04,
+        CY82_IDE_ADDRSETUP      = 0x48,
+        CY82_IDE_MASTER_IOR     = 0x4C,
+        CY82_IDE_MASTER_IOW     = 0x4D,
+        CY82_IDE_SLAVE_IOR      = 0x4E,
+        CY82_IDE_SLAVE_IOW      = 0x4F,
+        CY82_IDE_MASTER_8BIT    = 0x50,
+        CY82_IDE_SLAVE_8BIT     = 0x51,
+
+        CY82_INDEX_PORT         = 0x22,
+        CY82_DATA_PORT          = 0x23,
+
+        CY82_INDEX_CTRLREG1     = 0x01,
+        CY82_INDEX_CHANNEL0     = 0x30,
+        CY82_INDEX_CHANNEL1     = 0x31,
+        CY82_INDEX_TIMEOUT      = 0x32
+};
+
+static int cy82c693_pre_reset(struct ata_port *ap)
+{
+        ap->cbl = ATA_CBL_PATA40;
+        return ata_std_prereset(ap);
+}
+
+static void cy82c693_error_handler(struct ata_port *ap)
+{
+        ata_bmdma_drive_eh(ap, cy82c693_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
+}
+
+/**
+ *      cy82c693_set_piomode    -       set initial PIO mode data
+ *      @ap: ATA interface
+ *      @adev: ATA device
+ *
+ *      Called to do the PIO mode setup.
+ */
+ 
+static void cy82c693_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+        struct ata_timing t;
+        const unsigned long T = 1000000 / 33;
+        short time_16, time_8;
+        u32 addr;
+        
+        if (ata_timing_compute(adev, adev->pio_mode, &t, T, 1) < 0) {
+                printk(KERN_ERR DRV_NAME ": mome computation failed.\n");
+                return;
+        }
+
+        time_16 = FIT(t.recover, 0, 15) | (FIT(t.active, 0, 15) << 4);
+        time_8 = FIT(t.act8b, 0, 15) | (FIT(t.rec8b, 0, 15) << 4);
+        
+        if (adev->devno == 0) {
+                pci_read_config_dword(pdev, CY82_IDE_ADDRSETUP, &addr);
+                
+                addr &= ~0x0F;  /* Mask bits */
+                addr |= FIT(t.setup, 0, 15);
+                
+                pci_write_config_dword(pdev, CY82_IDE_ADDRSETUP, addr);
+                pci_write_config_byte(pdev, CY82_IDE_MASTER_IOR, time_16);
+                pci_write_config_byte(pdev, CY82_IDE_MASTER_IOW, time_16);
+                pci_write_config_byte(pdev, CY82_IDE_MASTER_8BIT, time_8);
+        } else {
+                pci_read_config_dword(pdev, CY82_IDE_ADDRSETUP, &addr);
+                
+                addr &= ~0xF0;  /* Mask bits */
+                addr |= (FIT(t.setup, 0, 15) << 4);
+
+                pci_write_config_dword(pdev, CY82_IDE_ADDRSETUP, addr);
+                pci_write_config_byte(pdev, CY82_IDE_SLAVE_IOR, time_16);
+                pci_write_config_byte(pdev, CY82_IDE_SLAVE_IOW, time_16);
+                pci_write_config_byte(pdev, CY82_IDE_SLAVE_8BIT, time_8);
+        }
+}
+
+/**
+ *      cy82c693_set_dmamode    -       set initial DMA mode data
+ *      @ap: ATA interface
+ *      @adev: ATA device
+ *
+ *      Called to do the DMA mode setup.
+ */
+ 
+static void cy82c693_set_dmamode(struct ata_port *ap, struct ata_device *adev)
+{
+        int reg = CY82_INDEX_CHANNEL0 + ap->port_no;
+        
+        /* Be afraid, be very afraid. Magic registers  in low I/O space */
+        outb(reg, 0x22);
+        outb(adev->dma_mode - XFER_MW_DMA_0, 0x23);
+        
+        /* 0x50 gives the best behaviour on the Alpha's using this chip */
+        outb(CY82_INDEX_TIMEOUT, 0x22);
+        outb(0x50, 0x23);
+}
+
+static struct scsi_host_template cy82c693_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 cy82c693_port_ops = {
+        .port_disable   = ata_port_disable,
+        .set_piomode    = cy82c693_set_piomode,
+        .set_dmamode    = cy82c693_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  = cy82c693_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
+};      
+
+static int cy82c693_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+        static struct ata_port_info info = {
+                .sht = &cy82c693_sht,
+                .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+                .pio_mask = 0x1f,
+                .mwdma_mask = 0x07,
+                .port_ops = &cy82c693_port_ops
+        };
+        static struct ata_port_info *port_info[1] = { &info };
+        
+        /* Devfn 1 is the ATA primary. The secondary is magic and on devfn2. For the
+           moment we don't handle the secondary. FIXME */
+           
+        if (PCI_FUNC(pdev->devfn) != 1)
+                return -ENODEV;
+        
+        return ata_pci_init_one(pdev, port_info, 1);
+}
+
+static struct pci_device_id cy82c693[] = {
+        { PCI_VENDOR_ID_CONTAQ, PCI_DEVICE_ID_CONTAQ_82C693, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+        { 0, },
+};
+
+static struct pci_driver cy82c693_pci_driver = {
+        .name           = DRV_NAME,
+        .id_table       = cy82c693,
+        .probe          = cy82c693_init_one,
+        .remove         = ata_pci_remove_one
+};
+
+static int __init cy82c693_init(void)
+{
+        return pci_register_driver(&cy82c693_pci_driver);
+}
+
+
+static void __exit cy82c693_exit(void)
+{
+        pci_unregister_driver(&cy82c693_pci_driver);
+}
+
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("low-level driver for the CY82C693 PATA controller");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, cy82c693);
+MODULE_VERSION(DRV_VERSION);
+
+module_init(cy82c693_init);
+module_exit(cy82c693_exit);