[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, 423 insertions, 0 deletions

diff --git a/drivers/ata/pata_pdc202xx_old.c b/drivers/ata/pata_pdc202xx_old.c
new file mode 100644
index 000000000000..6cb52b0e7696
--- /dev/null
+++ b/drivers/ata/pata_pdc202xx_old.c
@@ -0,0 +1,423 @@
+/*
+ * pata_pdc202xx_old.c  - Promise PDC202xx PATA for new ATA layer
+ *                        (C) 2005 Red Hat Inc
+ *                        Alan Cox <alan@redhat.com>
+ *
+ * Based in part on linux/drivers/ide/pci/pdc202xx_old.c
+ *
+ * First cut with LBA48/ATAPI
+ *
+ * TODO:
+ *      Channel interlock/reset on both required ?
+ */
+ 
+#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_pdc202xx_old"
+#define DRV_VERSION "0.2.1"
+
+/**
+ *      pdc2024x_pre_reset              -       probe begin
+ *      @ap: ATA port
+ *
+ *      Set up cable type and use generic probe init
+ */
+ 
+static int pdc2024x_pre_reset(struct ata_port *ap)
+{
+        ap->cbl = ATA_CBL_PATA40;
+        return ata_std_prereset(ap);
+}
+
+
+static void pdc2024x_error_handler(struct ata_port *ap)
+{
+        ata_bmdma_drive_eh(ap, pdc2024x_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
+}
+
+
+static int pdc2026x_pre_reset(struct ata_port *ap)
+{
+        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+        u16 cis;
+        
+        pci_read_config_word(pdev, 0x50, &cis);
+        if (cis & (1 << (10 + ap->port_no)))
+                ap->cbl = ATA_CBL_PATA80;
+        else
+                ap->cbl = ATA_CBL_PATA40;
+
+        return ata_std_prereset(ap);
+}
+
+static void pdc2026x_error_handler(struct ata_port *ap)
+{
+        ata_bmdma_drive_eh(ap, pdc2026x_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
+}
+
+/**
+ *      pdc_configure_piomode   -       set chip PIO timing
+ *      @ap: ATA interface
+ *      @adev: ATA device
+ *      @pio: PIO mode
+ *
+ *      Called to do the PIO mode setup. Our timing registers are shared
+ *      so a configure_dmamode call will undo any work we do here and vice
+ *      versa
+ */
+ 
+static void pdc_configure_piomode(struct ata_port *ap, struct ata_device *adev, int pio)
+{
+        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+        int port = 0x60 + 4 * ap->port_no + 2 * adev->devno;
+        static u16 pio_timing[5] = {
+                0x0913, 0x050C , 0x0308, 0x0206, 0x0104
+        };
+        u8 r_ap, r_bp;
+
+        pci_read_config_byte(pdev, port, &r_ap);
+        pci_read_config_byte(pdev, port + 1, &r_bp);
+        r_ap &= ~0x3F;  /* Preserve ERRDY_EN, SYNC_IN */
+        r_bp &= ~0x07;
+        r_ap |= (pio_timing[pio] >> 8);
+        r_bp |= (pio_timing[pio] & 0xFF);
+        
+        if (ata_pio_need_iordy(adev))
+                r_ap |= 0x20;   /* IORDY enable */
+        if (adev->class == ATA_DEV_ATA)
+                r_ap |= 0x10;   /* FIFO enable */
+        pci_write_config_byte(pdev, port, r_ap);
+        pci_write_config_byte(pdev, port + 1, r_bp);
+}
+
+/**
+ *      pdc_set_piomode -       set initial PIO mode data
+ *      @ap: ATA interface
+ *      @adev: ATA device
+ *
+ *      Called to do the PIO mode setup. Our timing registers are shared
+ *      but we want to set the PIO timing by default.
+ */
+ 
+static void pdc_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+        pdc_configure_piomode(ap, adev, adev->pio_mode - XFER_PIO_0);
+}
+
+/**
+ *      pdc_configure_dmamode   -       set DMA mode in chip
+ *      @ap: ATA interface
+ *      @adev: ATA device
+ *
+ *      Load DMA cycle times into the chip ready for a DMA transfer
+ *      to occur.
+ */
+ 
+static void pdc_set_dmamode(struct ata_port *ap, struct ata_device *adev)
+{
+        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+        int port = 0x60 + 4 * ap->port_no + 2 * adev->devno;
+        static u8 udma_timing[6][2] = {
+                { 0x60, 0x03 }, /* 33 Mhz Clock */
+                { 0x40, 0x02 },
+                { 0x20, 0x01 },
+                { 0x40, 0x02 }, /* 66 Mhz Clock */
+                { 0x20, 0x01 },
+                { 0x20, 0x01 }          
+        };
+        u8 r_bp, r_cp;
+        
+        pci_read_config_byte(pdev, port + 1, &r_bp);
+        pci_read_config_byte(pdev, port + 2, &r_cp);
+        
+        r_bp &= ~0xF0;
+        r_cp &= ~0x0F;
+        
+        if (adev->dma_mode >= XFER_UDMA_0) {
+                int speed = adev->dma_mode - XFER_UDMA_0;
+                r_bp |= udma_timing[speed][0];
+                r_cp |= udma_timing[speed][1];
+                
+        } else {
+                int speed = adev->dma_mode - XFER_MW_DMA_0;
+                r_bp |= 0x60;
+                r_cp |= (5 - speed);
+        }
+        pci_write_config_byte(pdev, port + 1, r_bp);
+        pci_write_config_byte(pdev, port + 2, r_cp);
+        
+}
+
+/**
+ *      pdc2026x_bmdma_start            -       DMA engine begin
+ *      @qc: ATA command
+ *
+ *      In UDMA3 or higher we have to clock switch for the duration of the
+ *      DMA transfer sequence.
+ */
+ 
+static void pdc2026x_bmdma_start(struct ata_queued_cmd *qc)
+{
+        struct ata_port *ap = qc->ap;
+        struct ata_device *adev = qc->dev;
+        struct ata_taskfile *tf = &qc->tf;
+        int sel66 = ap->port_no ? 0x08: 0x02;
+
+        unsigned long master = ap->host->ports[0]->ioaddr.bmdma_addr;
+        unsigned long clock = master + 0x11;
+        unsigned long atapi_reg = master + 0x20 + (4 * ap->port_no);
+        
+        u32 len;
+        
+        /* Check we keep host level locking here */
+        if (adev->dma_mode >= XFER_UDMA_2)
+                outb(inb(clock) | sel66, clock);
+        else
+                outb(inb(clock) & ~sel66, clock);
+
+        /* The DMA clocks may have been trashed by a reset. FIXME: make conditional 
+           and move to qc_issue ? */
+        pdc_set_dmamode(ap, qc->dev);
+
+        /* Cases the state machine will not complete correctly without help */
+        if ((tf->flags & ATA_TFLAG_LBA48) ||  tf->protocol == ATA_PROT_ATAPI_DMA)
+        {
+                if (tf->flags & ATA_TFLAG_LBA48)
+                        len = qc->nsect * 512;
+                else
+                        len = qc->nbytes;
+                
+                if (tf->flags & ATA_TFLAG_WRITE)
+                        len |= 0x06000000;
+                else
+                        len |= 0x05000000;
+                        
+                outl(len, atapi_reg);
+        }
+        
+        /* Activate DMA */      
+        ata_bmdma_start(qc);
+}
+
+/**
+ *      pdc2026x_bmdma_end              -       DMA engine stop
+ *      @qc: ATA command
+ *
+ *      After a DMA completes we need to put the clock back to 33MHz for
+ *      PIO timings.
+ */
+ 
+static void pdc2026x_bmdma_stop(struct ata_queued_cmd *qc)
+{
+        struct ata_port *ap = qc->ap;
+        struct ata_device *adev = qc->dev;
+        struct ata_taskfile *tf = &qc->tf;
+        
+        int sel66 = ap->port_no ? 0x08: 0x02;
+        /* The clock bits are in the same register for both channels */
+        unsigned long master = ap->host->ports[0]->ioaddr.bmdma_addr;
+        unsigned long clock = master + 0x11;
+        unsigned long atapi_reg = master + 0x20 + (4 * ap->port_no);
+        
+        /* Cases the state machine will not complete correctly */
+        if (tf->protocol == ATA_PROT_ATAPI_DMA || ( tf->flags & ATA_TFLAG_LBA48)) {
+                outl(0, atapi_reg);
+                outb(inb(clock) & ~sel66, clock);
+        }
+        /* Check we keep host level locking here */
+        /* Flip back to 33Mhz for PIO */
+        if (adev->dma_mode >= XFER_UDMA_2)
+                outb(inb(clock) & ~sel66, clock);
+
+        ata_bmdma_stop(qc);
+}
+
+/**
+ *      pdc2026x_dev_config     -       device setup hook
+ *      @ap: ATA port
+ *      @adev: newly found device
+ *
+ *      Perform chip specific early setup. We need to lock the transfer
+ *      sizes to 8bit to avoid making the state engine on the 2026x cards
+ *      barf.
+ */
+ 
+static void pdc2026x_dev_config(struct ata_port *ap, struct ata_device *adev)
+{
+        adev->max_sectors = 256;
+}
+
+static struct scsi_host_template pdc_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 pdc2024x_port_ops = {
+        .port_disable   = ata_port_disable,
+        .set_piomode    = pdc_set_piomode,
+        .set_dmamode    = pdc_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  = pdc2024x_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,
+        .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 struct ata_port_operations pdc2026x_port_ops = {
+        .port_disable   = ata_port_disable,
+        .set_piomode    = pdc_set_piomode,
+        .set_dmamode    = pdc_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,
+        .dev_config     = pdc2026x_dev_config,
+
+        .freeze         = ata_bmdma_freeze,
+        .thaw           = ata_bmdma_thaw,
+        .error_handler  = pdc2026x_error_handler,
+        .post_internal_cmd = ata_bmdma_post_internal_cmd,
+
+        .bmdma_setup    = ata_bmdma_setup,
+        .bmdma_start    = pdc2026x_bmdma_start,
+        .bmdma_stop     = pdc2026x_bmdma_stop,
+        .bmdma_status   = ata_bmdma_status,
+
+        .qc_prep        = ata_qc_prep,
+        .qc_issue       = ata_qc_issue_prot,
+        .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 pdc_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+        static struct ata_port_info info[3] = {
+                {
+                        .sht = &pdc_sht,
+                        .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+                        .pio_mask = 0x1f,
+                        .mwdma_mask = 0x07,
+                        .udma_mask = ATA_UDMA2,
+                        .port_ops = &pdc2024x_port_ops
+                }, 
+                {
+                        .sht = &pdc_sht,
+                        .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+                        .pio_mask = 0x1f,
+                        .mwdma_mask = 0x07,
+                        .udma_mask = ATA_UDMA4,
+                        .port_ops = &pdc2026x_port_ops
+                },
+                {
+                        .sht = &pdc_sht,
+                        .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+                        .pio_mask = 0x1f,
+                        .mwdma_mask = 0x07,
+                        .udma_mask = ATA_UDMA5,
+                        .port_ops = &pdc2026x_port_ops
+                }
+                
+        };
+        static struct ata_port_info *port_info[2];
+
+        port_info[0] = port_info[1] = &info[id->driver_data];
+        
+        if (dev->device == PCI_DEVICE_ID_PROMISE_20265) {
+                struct pci_dev *bridge = dev->bus->self;
+                /* Don't grab anything behind a Promise I2O RAID */
+                if (bridge && bridge->vendor == PCI_VENDOR_ID_INTEL) {
+                        if( bridge->device == PCI_DEVICE_ID_INTEL_I960)
+                                return -ENODEV;
+                        if( bridge->device == PCI_DEVICE_ID_INTEL_I960RM)
+                                return -ENODEV;
+                }
+        }
+        return ata_pci_init_one(dev, port_info, 2);
+}
+
+static struct pci_device_id pdc[] = {
+        { PCI_DEVICE(PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20246), 0},
+        { PCI_DEVICE(PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20262), 1},
+        { PCI_DEVICE(PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20263), 1},
+        { PCI_DEVICE(PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20265), 2},
+        { PCI_DEVICE(PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20267), 2},
+        { 0, },
+};
+
+static struct pci_driver pdc_pci_driver = {
+        .name           = DRV_NAME,
+        .id_table       = pdc,
+        .probe          = pdc_init_one,
+        .remove         = ata_pci_remove_one
+};
+
+static int __init pdc_init(void)
+{
+        return pci_register_driver(&pdc_pci_driver);
+}
+
+
+static void __exit pdc_exit(void)
+{
+        pci_unregister_driver(&pdc_pci_driver);
+}
+
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("low-level driver for Promise 2024x and 20262-20267");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, pdc);
+MODULE_VERSION(DRV_VERSION);
+
+module_init(pdc_init);
+module_exit(pdc_exit);