kernel-ark/drivers/ata/pata_qdi.c
Alan Cox f834e49f1a libata: Add a host flag to indicate lack of IORDY capability
This is the first preparation to doing the !IORDY cases properly.  Further
diffs will then add the needed logic to do it right.

Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: Tejun Heo <htejun@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-02-15 18:04:01 -05:00

416 lines
9.8 KiB
C

/*
* 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)
iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
else
ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
if (unlikely(slop)) {
u32 pad;
if (write_data) {
memcpy(&pad, buf + buflen - slop, slop);
pad = le32_to_cpu(pad);
iowrite32(pad, ap->ioaddr.data_addr);
} else {
pad = ioread32(ap->ioaddr.data_addr);
pad = cpu_to_le32(pad);
memcpy(buf + buflen - slop, &pad, slop);
}
}
} else
ata_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,
.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,
.slave_destroy = ata_scsi_slave_destroy,
.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,
.data_xfer = qdi_data_xfer,
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
.irq_on = ata_irq_on,
.irq_ack = ata_irq_ack,
.port_start = ata_port_start,
};
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,
.data_xfer = qdi_data_xfer,
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
.irq_on = ata_irq_on,
.irq_ack = ata_irq_ack,
.port_start = ata_port_start,
};
/**
* 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;
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, io + 0x206, 1);
if (!io_addr || !ctl_addr)
goto fail;
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;
ae.port_flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST;
} else {
ae.port_ops = &qdi6500_port_ops;
ae.pio_mask = 0x07; /* Actually PIO3 !IORDY is possible */
ae.port_flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST |
ATA_FLAG_NO_IORDY;
}
ae.sht = &qdi_sht;
ae.n_ports = 1;
ae.irq = irq;
ae.irq_flags = 0;
ae.port[0].cmd_addr = io_addr;
ae.port[0].altstatus_addr = ctl_addr;
ae.port[0].ctl_addr = ctl_addr;
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 = -ENODEV;
if (!ata_device_add(&ae))
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;
}
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_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);