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linux-next/drivers/ata/pata_cmd64x.c
Jeff Garzik 85cd7251b9 [libata #pata-drivers] Trim trailing whitespace.
2006-08-31 00:03:49 -04:00

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/*
* 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);
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