+++ /dev/null
-/*
- * pata_qdi.c - QDI VLB ATA controllers
- * (C) 2006 Red Hat
- *
- * 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@ens-lyon.org>
- */
-
-#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 "0.3.1"
-
-#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 - clamp_val(t.active, 1, 8);
- recovery = 18 - clamp_val(t.recover, 3, 18);
- } else {
- active = 9 - clamp_val(t.active, 2, 9);
- recovery = 15 - clamp_val(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 - clamp_val(t.active, 1, 8);
- recovery = 18 - clamp_val(t.recover, 3, 18);
- } else {
- active = 9 - clamp_val(t.active, 2, 9);
- recovery = 15 - clamp_val(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 - 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(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_sff_qc_issue(qc);
-}
-
-static unsigned int qdi_data_xfer(struct ata_device *dev, unsigned char *buf,
- unsigned int buflen, int rw)
-{
- if (ata_id_has_dword_io(dev->id)) {
- struct ata_port *ap = dev->link->ap;
- int slop = buflen & 3;
-
- if (rw == READ)
- ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
- else
- iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
-
- if (unlikely(slop)) {
- __le32 pad;
- if (rw == READ) {
- pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr));
- memcpy(buf + buflen - slop, &pad, slop);
- } else {
- memcpy(&pad, buf + buflen - slop, slop);
- iowrite32(le32_to_cpu(pad), ap->ioaddr.data_addr);
- }
- buflen += 4 - slop;
- }
- } else
- buflen = ata_sff_data_xfer(dev, buf, buflen, rw);
-
- return buflen;
-}
-
-static struct scsi_host_template qdi_sht = {
- ATA_PIO_SHT(DRV_NAME),
-};
-
-static struct ata_port_operations qdi6500_port_ops = {
- .inherits = &ata_sff_port_ops,
- .qc_issue = qdi_qc_issue,
- .sff_data_xfer = qdi_data_xfer,
- .cable_detect = ata_cable_40wire,
- .set_piomode = qdi6500_set_piomode,
-};
-
-static struct ata_port_operations qdi6580_port_ops = {
- .inherits = &qdi6500_port_ops,
- .set_piomode = qdi6580_set_piomode,
-};
-
-/**
- * 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)
-{
- unsigned long ctl = io + 0x206;
- struct platform_device *pdev;
- struct ata_host *host;
- struct ata_port *ap;
- void __iomem *io_addr, *ctl_addr;
- int ret;
-
- /*
- * Fill in a probe structure first of all
- */
-
- pdev = platform_device_register_simple(DRV_NAME, nr_qdi_host, NULL, 0);
- if (IS_ERR(pdev))
- return PTR_ERR(pdev);
-
- ret = -ENOMEM;
- io_addr = devm_ioport_map(&pdev->dev, io, 8);
- ctl_addr = devm_ioport_map(&pdev->dev, ctl, 1);
- if (!io_addr || !ctl_addr)
- goto fail;
-
- ret = -ENOMEM;
- host = ata_host_alloc(&pdev->dev, 1);
- if (!host)
- goto fail;
- ap = host->ports[0];
-
- if (type == 6580) {
- ap->ops = &qdi6580_port_ops;
- ap->pio_mask = ATA_PIO4;
- ap->flags |= ATA_FLAG_SLAVE_POSS;
- } else {
- ap->ops = &qdi6500_port_ops;
- ap->pio_mask = ATA_PIO2; /* Actually PIO3 !IORDY is possible */
- ap->flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_NO_IORDY;
- }
-
- ap->ioaddr.cmd_addr = io_addr;
- ap->ioaddr.altstatus_addr = ctl_addr;
- ap->ioaddr.ctl_addr = ctl_addr;
- ata_sff_std_ports(&ap->ioaddr);
-
- ata_port_desc(ap, "cmd %lx ctl %lx", io, ctl);
-
- /*
- * Hook in a private data structure per channel
- */
- ap->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);
-
- /* activate */
- ret = ata_host_activate(host, irq, ata_sff_interrupt, 0, &qdi_sht);
- if (ret)
- goto fail;
-
- qdi_host[nr_qdi_host++] = dev_get_drvdata(&pdev->dev);
- return 0;
-
- fail:
- platform_device_unregister(pdev);
- return ret;
-}
-
-/**
- * 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;
- }
- if (qdi_init_one(port, 6500, ide_port[r & 0x01], ide_irq[r & 0x01], r & 0x04) == 0)
- ct++;
- }
- 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 */
- if (qdi_init_one(port, 6580, ide_port[r & 0x01], ide_irq[r & 0x01], r & 0x04) == 0)
- ct++;
- } else {
- /* Dual channel mode */
- if (qdi_init_one(port, 6580, 0x1F0, 14, r & 0x04) == 0)
- ct++;
- if (qdi_init_one(port + 2, 6580, 0x170, 15, r & 0x04) == 0)
- ct++;
- }
- }
- }
- }
- 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_detach(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);
-
projects / karo-tx-linux.git / commitdiff