[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, 403 insertions, 0 deletions

diff --git a/drivers/ata/pata_qdi.c b/drivers/ata/pata_qdi.c
new file mode 100644
index 000000000000..ededb40e084d
--- /dev/null
+++ b/drivers/ata/pata_qdi.c
@@ -0,0 +1,403 @@
+/*
+ *    pata_qdi.c - QDI VLB ATA controllers
+ *      (C) 2006 Red Hat <alan@redhat.com>
+ *
+ * This driver mostly exists as a proof of concept for non PCI devices under
+ * libata. While the QDI6580 was 'neat' in 1993 it is no longer terribly
+ * useful.
+ *
+ * Tuning code written from the documentation at
+ * http://www.ryston.cz/petr/vlb/qd6500.html
+ * http://www.ryston.cz/petr/vlb/qd6580.html
+ *
+ * Probe code based on drivers/ide/legacy/qd65xx.c
+ * Rewritten from the work of Colten Edwards <pje120@cs.usask.ca> by
+ * Samuel Thibault <samuel.thibault@fnac.net>
+ */
+
+#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 <linux/platform_device.h>
+
+#define DRV_NAME "pata_qdi"
+#define DRV_VERSION "0.2.4"
+
+#define NR_HOST 4       /* Two 6580s */
+
+struct qdi_data {
+        unsigned long timing;
+        u8 clock[2];
+        u8 last;
+        int fast;
+        struct platform_device *platform_dev;
+        
+};
+
+static struct ata_host *qdi_host[NR_HOST];
+static struct qdi_data qdi_data[NR_HOST];
+static int nr_qdi_host;
+
+#ifdef MODULE
+static int probe_qdi = 1;
+#else
+static int probe_qdi;
+#endif
+
+static void qdi6500_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+        struct ata_timing t;
+        struct qdi_data *qdi = ap->host->private_data;
+        int active, recovery;
+        u8 timing;
+
+        /* Get the timing data in cycles */
+        ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);
+        
+        if (qdi->fast) {
+                active = 8 - FIT(t.active, 1, 8);
+                recovery = 18 - FIT(t.recover, 3, 18);
+        } else {
+                active = 9 - FIT(t.active, 2, 9);
+                recovery = 15 - FIT(t.recover, 0, 15);
+        }
+        timing = (recovery << 4) | active | 0x08;
+        
+        qdi->clock[adev->devno] = timing;
+
+        outb(timing, qdi->timing);      
+}
+
+static void qdi6580_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+        struct ata_timing t;
+        struct qdi_data *qdi = ap->host->private_data;
+        int active, recovery;
+        u8 timing;
+
+        /* Get the timing data in cycles */
+        ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);
+        
+        if (qdi->fast) {
+                active = 8 - FIT(t.active, 1, 8);
+                recovery = 18 - FIT(t.recover, 3, 18);
+        } else {
+                active = 9 - FIT(t.active, 2, 9);
+                recovery = 15 - FIT(t.recover, 0, 15);
+        }
+        timing = (recovery << 4) | active | 0x08;
+        
+        qdi->clock[adev->devno] = timing;
+
+        outb(timing, qdi->timing);
+        
+        /* Clear the FIFO */
+        if (adev->class != ATA_DEV_ATA)
+                outb(0x5F, (qdi->timing & 0xFFF0) + 3);
+}
+
+/**
+ *      qdi_qc_issue_prot       -       command issue
+ *      @qc: command pending
+ *
+ *      Called when the libata layer is about to issue a command. We wrap
+ *      this interface so that we can load the correct ATA timings.
+ */
+
+static unsigned int qdi_qc_issue_prot(struct ata_queued_cmd *qc)
+{
+        struct ata_port *ap = qc->ap;
+        struct ata_device *adev = qc->dev;
+        struct qdi_data *qdi = ap->host->private_data;
+
+        if (qdi->clock[adev->devno] != qdi->last) {
+                if (adev->pio_mode) {
+                        qdi->last = qdi->clock[adev->devno];
+                        outb(qdi->clock[adev->devno], qdi->timing);
+                }
+        }
+        return ata_qc_issue_prot(qc);
+}
+
+static void qdi_data_xfer(struct ata_device *adev, unsigned char *buf, unsigned int buflen, int write_data)
+{
+        struct ata_port *ap = adev->ap;
+        int slop = buflen & 3;
+        
+        if (ata_id_has_dword_io(adev->id)) {
+                if (write_data)
+                        outsl(ap->ioaddr.data_addr, buf, buflen >> 2);
+                else
+                        insl(ap->ioaddr.data_addr, buf, buflen >> 2);
+        
+                if (unlikely(slop)) {
+                        u32 pad;
+                        if (write_data) {
+                                memcpy(&pad, buf + buflen - slop, slop);
+                                outl(le32_to_cpu(pad), ap->ioaddr.data_addr);
+                        } else {
+                                pad = cpu_to_le16(inl(ap->ioaddr.data_addr));
+                                memcpy(buf + buflen - slop, &pad, slop);
+                        }
+                }
+        } else
+                ata_pio_data_xfer(adev, buf, buflen, write_data);
+}
+
+static struct scsi_host_template qdi_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 qdi6500_port_ops = {
+        .port_disable   = ata_port_disable,
+        .set_piomode    = qdi6500_set_piomode,
+
+        .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  = ata_bmdma_error_handler,
+        .post_internal_cmd = ata_bmdma_post_internal_cmd,
+        
+        .qc_prep        = ata_qc_prep,
+        .qc_issue       = qdi_qc_issue_prot,
+        .eng_timeout    = ata_eng_timeout,
+        .data_xfer      = qdi_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 qdi6580_port_ops = {
+        .port_disable   = ata_port_disable,
+        .set_piomode    = qdi6580_set_piomode,
+
+        .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  = ata_bmdma_error_handler,
+        .post_internal_cmd = ata_bmdma_post_internal_cmd,
+        
+        .qc_prep        = ata_qc_prep,
+        .qc_issue       = qdi_qc_issue_prot,
+        .eng_timeout    = ata_eng_timeout,
+        .data_xfer      = qdi_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
+};      
+
+/**
+ *      qdi_init_one            -       attach a qdi interface
+ *      @type: Type to display
+ *      @io: I/O port start
+ *      @irq: interrupt line
+ *      @fast: True if on a > 33Mhz VLB
+ *
+ *      Register an ISA bus IDE interface. Such interfaces are PIO and we
+ *      assume do not support IRQ sharing.
+ */
+ 
+static __init int qdi_init_one(unsigned long port, int type, unsigned long io, int irq, int fast)
+{
+        struct ata_probe_ent ae;
+        struct platform_device *pdev;
+        int ret;
+
+        unsigned long ctrl = io + 0x206;
+
+        /*
+         *      Fill in a probe structure first of all
+         */
+
+        pdev = platform_device_register_simple(DRV_NAME, nr_qdi_host, NULL, 0);
+        if (pdev == NULL)
+                return -ENOMEM;
+        
+        memset(&ae, 0, sizeof(struct ata_probe_ent));
+        INIT_LIST_HEAD(&ae.node);
+        ae.dev = &pdev->dev;
+        
+        if (type == 6580) {
+                ae.port_ops = &qdi6580_port_ops;
+                ae.pio_mask = 0x1F;
+        } else {
+                ae.port_ops = &qdi6500_port_ops;
+                ae.pio_mask = 0x07;     /* Actually PIO3 !IORDY is possible */
+        }
+        
+        ae.sht = &qdi_sht;
+        ae.n_ports = 1;
+        ae.irq = irq;
+        ae.irq_flags = 0;
+        ae.port_flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST;
+        ae.port[0].cmd_addr = io;
+        ae.port[0].altstatus_addr = ctrl;
+        ae.port[0].ctl_addr =   ctrl;
+        ata_std_ports(&ae.port[0]);
+
+        /*
+         *      Hook in a private data structure per channel
+         */
+        ae.private_data = &qdi_data[nr_qdi_host];
+
+        qdi_data[nr_qdi_host].timing = port;
+        qdi_data[nr_qdi_host].fast = fast;
+        qdi_data[nr_qdi_host].platform_dev = pdev;
+
+        printk(KERN_INFO DRV_NAME": qd%d at 0x%lx.\n", type, io);
+        ret = ata_device_add(&ae);
+        if (ret == 0) {
+                platform_device_unregister(pdev);
+                return -ENODEV;
+        }
+                
+        qdi_host[nr_qdi_host++] = dev_get_drvdata(&pdev->dev);
+        return 0;       
+}
+
+/**
+ *      qdi_init                -       attach qdi interfaces
+ *
+ *      Attach qdi IDE interfaces by scanning the ports it may occupy.
+ */
+ 
+static __init int qdi_init(void)
+{
+        unsigned long flags;
+        static const unsigned long qd_port[2] = { 0x30, 0xB0 };
+        static const unsigned long ide_port[2] = { 0x170, 0x1F0 };
+        static const int ide_irq[2] = { 14, 15 };
+        
+        int ct = 0;
+        int i;
+        
+        if (probe_qdi == 0)
+                return -ENODEV;
+        
+        /*
+         *      Check each possible QD65xx base address
+         */
+        
+        for (i = 0; i < 2; i++) {
+                unsigned long port = qd_port[i];
+                u8 r, res;
+                
+                
+                if (request_region(port, 2, "pata_qdi")) {
+                        /* Check for a card */
+                        local_irq_save(flags);
+                        r = inb_p(port);
+                        outb_p(0x19, port);
+                        res = inb_p(port);
+                        outb_p(r, port);
+                        local_irq_restore(flags);
+                
+                        /* Fail */
+                        if (res == 0x19)
+                        {
+                                release_region(port, 2);
+                                continue;
+                        }
+                        
+                        /* Passes the presence test */
+                        r = inb_p(port + 1);    /* Check port agrees with port set */
+                        if ((r & 2) >> 1 != i) {
+                                release_region(port, 2);
+                                continue;
+                        }
+
+                        /* Check card type */                   
+                        if ((r & 0xF0) == 0xC0) {
+                                /* QD6500: single channel */
+                                if (r & 8) {
+                                        /* Disabled ? */
+                                        release_region(port, 2);
+                                        continue;
+                                }
+                                ct += qdi_init_one(port, 6500, ide_port[r & 0x01], ide_irq[r & 0x01], r & 0x04);
+                        }
+                        if (((r & 0xF0) == 0xA0) || (r & 0xF0) == 0x50) {
+                                /* QD6580: dual channel */
+                                if (!request_region(port + 2 , 2, "pata_qdi"))
+                                {
+                                        release_region(port, 2);
+                                        continue;
+                                }
+                                res = inb(port + 3);
+                                if (res & 1) {
+                                        /* Single channel mode */
+                                        ct += qdi_init_one(port, 6580, ide_port[r & 0x01], ide_irq[r & 0x01], r & 0x04);
+                                } else {
+                                        /* Dual channel mode */
+                                        ct += qdi_init_one(port, 6580, 0x1F0, 14, r & 0x04);
+                                        ct += qdi_init_one(port + 2, 6580, 0x170, 15, r & 0x04);
+                                }
+                        }
+                }
+        }
+        if (ct != 0)
+                return 0;
+        return -ENODEV;
+}
+
+static __exit void qdi_exit(void)
+{
+        int i;
+
+        for (i = 0; i < nr_qdi_host; i++) {
+                ata_host_remove(qdi_host[i]);
+                /* Free the control resource. The 6580 dual channel has the resources
+                 * claimed as a pair of 2 byte resources so we need no special cases...
+                 */
+                release_region(qdi_data[i].timing, 2);
+                platform_device_unregister(qdi_data[i].platform_dev);
+        }       
+}
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("low-level driver for qdi ATA");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);
+
+module_init(qdi_init);
+module_exit(qdi_exit);
+
+module_param(probe_qdi, int, 0);
+