[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, 505 insertions, 0 deletions

diff --git a/drivers/ata/pata_cmd64x.c b/drivers/ata/pata_cmd64x.c
new file mode 100644
index 000000000000..03284611a727
--- /dev/null
+++ b/drivers/ata/pata_cmd64x.c
@@ -0,0 +1,505 @@
+/*
+ * pata_cmd64x.c        - ATI PATA for new ATA layer
+ *                        (C) 2005 Red Hat Inc
+ *                        Alan Cox <alan@redhat.com>
+ *
+ * Based upon
+ * linux/drivers/ide/pci/cmd64x.c               Version 1.30    Sept 10, 2002
+ *
+ * cmd64x.c: Enable interrupts at initialization time on Ultra/PCI machines.
+ *           Note, this driver is not used at all on other systems because
+ *           there the "BIOS" has done all of the following already.
+ *           Due to massive hardware bugs, UltraDMA is only supported
+ *           on the 646U2 and not on the 646U.
+ *
+ * Copyright (C) 1998           Eddie C. Dost  (ecd@skynet.be)
+ * Copyright (C) 1998           David S. Miller (davem@redhat.com)
+ *
+ * Copyright (C) 1999-2002      Andre Hedrick <andre@linux-ide.org>
+ *
+ * TODO
+ *      Testing work
+ */
+ 
+#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_cmd64x"
+#define DRV_VERSION "0.2.1"
+
+/*
+ * CMD64x specific registers definition.
+ */
+ 
+enum {
+        CFR             = 0x50,
+                CFR_INTR_CH0  = 0x02,
+        CNTRL           = 0x51,
+                CNTRL_DIS_RA0 = 0x40,
+                CNTRL_DIS_RA1 = 0x80,
+                CNTRL_ENA_2ND = 0x08,
+        CMDTIM          = 0x52,
+        ARTTIM0         = 0x53,
+        DRWTIM0         = 0x54,
+        ARTTIM1         = 0x55,
+        DRWTIM1         = 0x56,
+        ARTTIM23        = 0x57,
+                ARTTIM23_DIS_RA2  = 0x04,
+                ARTTIM23_DIS_RA3  = 0x08,
+                ARTTIM23_INTR_CH1 = 0x10,
+        ARTTIM2         = 0x57,
+        ARTTIM3         = 0x57,
+        DRWTIM23        = 0x58,
+        DRWTIM2         = 0x58,
+        BRST            = 0x59,
+        DRWTIM3         = 0x5b,
+        BMIDECR0        = 0x70,
+        MRDMODE         = 0x71,
+                MRDMODE_INTR_CH0 = 0x04,
+                MRDMODE_INTR_CH1 = 0x08,
+                MRDMODE_BLK_CH0  = 0x10,
+                MRDMODE_BLK_CH1  = 0x20,
+        BMIDESR0        = 0x72,
+        UDIDETCR0       = 0x73,
+        DTPR0           = 0x74,
+        BMIDECR1        = 0x78,
+        BMIDECSR        = 0x79,
+        BMIDESR1        = 0x7A,
+        UDIDETCR1       = 0x7B,
+        DTPR1           = 0x7C
+};
+
+static int cmd64x_pre_reset(struct ata_port *ap)
+{
+        ap->cbl = ATA_CBL_PATA40;
+        return ata_std_prereset(ap);
+}
+
+static int cmd648_pre_reset(struct ata_port *ap)
+{
+        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+        u8 r;
+
+        /* Check cable detect bits */
+        pci_read_config_byte(pdev, BMIDECSR, &r);
+        if (r & (1 << ap->port_no))
+                ap->cbl = ATA_CBL_PATA80;
+        else    
+                ap->cbl = ATA_CBL_PATA40;
+                
+        return ata_std_prereset(ap);
+}
+
+static void cmd64x_error_handler(struct ata_port *ap)
+{
+        return ata_bmdma_drive_eh(ap, cmd64x_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
+}
+
+static void cmd648_error_handler(struct ata_port *ap)
+{
+        ata_bmdma_drive_eh(ap, cmd648_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
+}
+
+/**
+ *      cmd64x_set_piomode      -       set initial PIO mode data
+ *      @ap: ATA interface
+ *      @adev: ATA device
+ *
+ *      Called to do the PIO mode setup.
+ */
+ 
+static void cmd64x_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;
+        const u8 setup_data[] = { 0x40, 0x40, 0x40, 0x80, 0x00 };
+        
+        u8 reg;
+        
+        /* Port layout is not logical so use a table */
+        const u8 arttim_port[2][2] = { 
+                { ARTTIM0, ARTTIM1 },
+                { ARTTIM23, ARTTIM23 }
+        };
+        const u8 drwtim_port[2][2] = {
+                { DRWTIM0, DRWTIM1 },
+                { DRWTIM2, DRWTIM3 }
+        };
+        
+        int arttim = arttim_port[ap->port_no][adev->devno];
+        int drwtim = drwtim_port[ap->port_no][adev->devno];
+        
+        
+        if (ata_timing_compute(adev, adev->pio_mode, &t, T, 0) < 0) {
+                printk(KERN_ERR DRV_NAME ": mode computation failed.\n");
+                return;
+        }
+        if (ap->port_no) {
+                /* Slave has shared address setup */
+                struct ata_device *pair = ata_dev_pair(adev);
+                
+                if (pair) {
+                        struct ata_timing tp;
+                        ata_timing_compute(pair, pair->pio_mode, &tp, T, 0);
+                        ata_timing_merge(&t, &tp, &t, ATA_TIMING_SETUP);
+                }
+        }
+        
+        printk(KERN_DEBUG DRV_NAME ": active %d recovery %d setup %d.\n",
+                t.active, t.recover, t.setup);
+        if (t.recover > 16) {
+                t.active += t.recover - 16;
+                t.recover = 16;
+        }
+        if (t.active > 16)
+                t.active = 16;
+                
+        /* Now convert the clocks into values we can actually stuff into
+           the chip */
+           
+        if (t.recover > 1)
+                t.recover--;
+        else
+                t.recover = 15;
+        
+        if (t.setup > 4)
+                t.setup = 0xC0;
+        else
+                t.setup = setup_data[t.setup];
+                
+        t.active &= 0x0F;       /* 0 = 16 */
+        
+        /* Load setup timing */
+        pci_read_config_byte(pdev, arttim, &reg);
+        reg &= 0x3F;
+        reg |= t.setup;
+        pci_write_config_byte(pdev, arttim, reg);
+        
+        /* Load active/recovery */
+        pci_write_config_byte(pdev, drwtim, (t.active << 4) | t.recover);       
+}
+
+/**
+ *      cmd64x_set_dmamode      -       set initial DMA mode data
+ *      @ap: ATA interface
+ *      @adev: ATA device
+ *
+ *      Called to do the DMA mode setup.
+ */
+ 
+static void cmd64x_set_dmamode(struct ata_port *ap, struct ata_device *adev)
+{
+        static const u8 udma_data[] = {
+                0x31, 0x21, 0x11, 0x25, 0x15, 0x05
+        };
+        static const u8 mwdma_data[] = { 
+                0x30, 0x20, 0x10
+        };
+        
+        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+        u8 regU, regD;
+
+        int pciU = UDIDETCR0 + 8 * ap->port_no;
+        int pciD = BMIDESR0 + 8 * ap->port_no;
+        int shift = 2 * adev->devno;
+        
+        pci_read_config_byte(pdev, pciD, &regD);
+        pci_read_config_byte(pdev, pciU, &regU);
+
+        regD &= ~(0x20 << shift);
+        regU &= ~(0x35 << shift);
+        
+        if (adev->dma_mode >= XFER_UDMA_0)
+                regU |= udma_data[adev->dma_mode - XFER_UDMA_0] << shift;
+        else
+                regD |= mwdma_data[adev->dma_mode - XFER_MW_DMA_0] << shift;
+
+        regD |= 0x20 << adev->devno;
+
+        pci_write_config_byte(pdev, pciU, regU);
+        pci_write_config_byte(pdev, pciD, regD);
+}
+
+/**
+ *      cmd648_dma_stop -       DMA stop callback
+ *      @qc: Command in progress
+ *
+ *      DMA has completed.
+ */
+
+static void cmd648_bmdma_stop(struct ata_queued_cmd *qc)
+{
+        struct ata_port *ap = qc->ap;
+        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+        u8 dma_intr;
+        int dma_reg = ap->port_no ? ARTTIM23_INTR_CH1 : CFR_INTR_CH0;
+        int dma_mask = ap->port_no ? ARTTIM2 : CFR;
+        
+        ata_bmdma_stop(qc);
+        
+        pci_read_config_byte(pdev, dma_reg, &dma_intr);
+        pci_write_config_byte(pdev, dma_reg, dma_intr | dma_mask);
+}
+                
+/**
+ *      cmd646r1_dma_stop       -       DMA stop callback
+ *      @qc: Command in progress
+ *
+ *      Stub for now while investigating the r1 quirk in the old driver.
+ */
+
+static void cmd646r1_bmdma_stop(struct ata_queued_cmd *qc)
+{
+        ata_bmdma_stop(qc);
+}
+                
+static struct scsi_host_template cmd64x_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 cmd64x_port_ops = {
+        .port_disable   = ata_port_disable,
+        .set_piomode    = cmd64x_set_piomode,
+        .set_dmamode    = cmd64x_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  = cmd64x_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 struct ata_port_operations cmd646r1_port_ops = {
+        .port_disable   = ata_port_disable,
+        .set_piomode    = cmd64x_set_piomode,
+        .set_dmamode    = cmd64x_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  = cmd64x_error_handler,
+        .post_internal_cmd = ata_bmdma_post_internal_cmd,
+
+        .bmdma_setup    = ata_bmdma_setup,
+        .bmdma_start    = ata_bmdma_start,
+        .bmdma_stop     = cmd646r1_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 struct ata_port_operations cmd648_port_ops = {
+        .port_disable   = ata_port_disable,
+        .set_piomode    = cmd64x_set_piomode,
+        .set_dmamode    = cmd64x_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  = cmd648_error_handler,
+        .post_internal_cmd = ata_bmdma_post_internal_cmd,
+
+        .bmdma_setup    = ata_bmdma_setup,
+        .bmdma_start    = ata_bmdma_start,
+        .bmdma_stop     = cmd648_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 cmd64x_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+        u32 class_rev;
+        
+        static struct ata_port_info cmd_info[6] = {
+                {       /* CMD 643 - no UDMA */
+                        .sht = &cmd64x_sht,
+                        .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+                        .pio_mask = 0x1f,
+                        .mwdma_mask = 0x07,
+                        .port_ops = &cmd64x_port_ops
+                },
+                {       /* CMD 646 with broken UDMA */
+                        .sht = &cmd64x_sht,
+                        .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+                        .pio_mask = 0x1f,
+                        .mwdma_mask = 0x07,
+                        .port_ops = &cmd64x_port_ops
+                },
+                {       /* CMD 646 with working UDMA */
+                        .sht = &cmd64x_sht,
+                        .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+                        .pio_mask = 0x1f,
+                        .mwdma_mask = 0x07,
+                        .udma_mask = ATA_UDMA1,
+                        .port_ops = &cmd64x_port_ops
+                },
+                {       /* CMD 646 rev 1  */
+                        .sht = &cmd64x_sht,
+                        .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+                        .pio_mask = 0x1f,
+                        .mwdma_mask = 0x07,
+                        .port_ops = &cmd646r1_port_ops
+                },
+                {       /* CMD 648 */
+                        .sht = &cmd64x_sht,
+                        .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+                        .pio_mask = 0x1f,
+                        .mwdma_mask = 0x07,
+                        .udma_mask = ATA_UDMA2,
+                        .port_ops = &cmd648_port_ops
+                },
+                {       /* CMD 649 */
+                        .sht = &cmd64x_sht,
+                        .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+                        .pio_mask = 0x1f,
+                        .mwdma_mask = 0x07,
+                        .udma_mask = ATA_UDMA3,
+                        .port_ops = &cmd648_port_ops
+                }
+        };
+        static struct ata_port_info *port_info[2], *info;
+        u8 mrdmode;
+        
+        info = &cmd_info[id->driver_data];
+        
+        pci_read_config_dword(pdev, PCI_CLASS_REVISION, &class_rev);
+        class_rev &= 0xFF;
+        
+        if (id->driver_data == 0)       /* 643 */
+                ata_pci_clear_simplex(pdev);
+        
+        if (pdev->device == PCI_DEVICE_ID_CMD_646) {
+                /* Does UDMA work ? */
+                if (class_rev > 4)
+                        info = &cmd_info[2];
+                /* Early rev with other problems ? */
+                else if (class_rev == 1)
+                        info = &cmd_info[3];
+        }
+
+        pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 64);
+        pci_read_config_byte(pdev, MRDMODE, &mrdmode);
+        mrdmode &= ~ 0x30;      /* IRQ set up */
+        mrdmode |= 0x02;        /* Memory read line enable */
+        pci_write_config_byte(pdev, MRDMODE, mrdmode);
+        
+        /* Force PIO 0 here.. */
+        
+        /* PPC specific fixup copied from old driver */
+#ifdef CONFIG_PPC
+        pci_write_config_byte(pdev, UDIDETCR0, 0xF0);
+#endif
+        
+        port_info[0] = port_info[1] = info;
+        return ata_pci_init_one(pdev, port_info, 2);
+}
+
+static struct pci_device_id cmd64x[] = {
+        { PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_CMD_643, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+        { PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_CMD_646, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
+        { PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_CMD_648, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4},
+        { PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_CMD_649, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 5},
+        { 0, },
+};
+
+static struct pci_driver cmd64x_pci_driver = {
+        .name           = DRV_NAME,
+        .id_table       = cmd64x,
+        .probe          = cmd64x_init_one,
+        .remove         = ata_pci_remove_one
+};
+
+static int __init cmd64x_init(void)
+{
+        return pci_register_driver(&cmd64x_pci_driver);
+}
+
+
+static void __exit cmd64x_exit(void)
+{
+        pci_unregister_driver(&cmd64x_pci_driver);
+}
+
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("low-level driver for CMD64x series PATA controllers");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, cmd64x);
+MODULE_VERSION(DRV_VERSION);
+
+module_init(cmd64x_init);
+module_exit(cmd64x_exit);