233 lines
6.3 KiB
C
233 lines
6.3 KiB
C
/*
|
|
* Copyright (C) 1998-2000 Andreas S. Krebs (akrebs@altavista.net), Maintainer
|
|
* Copyright (C) 1998-2002 Andre Hedrick <andre@linux-ide.org>, Integrator
|
|
* Copyright (C) 2007-2011 Bartlomiej Zolnierkiewicz
|
|
*
|
|
* CYPRESS CY82C693 chipset IDE controller
|
|
*
|
|
* The CY82C693 chipset is used on Digital's PC-Alpha 164SX boards.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/types.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/ide.h>
|
|
#include <linux/init.h>
|
|
|
|
#include <asm/io.h>
|
|
|
|
#define DRV_NAME "cy82c693"
|
|
|
|
/*
|
|
* NOTE: the value for busmaster timeout is tricky and I got it by
|
|
* trial and error! By using a to low value will cause DMA timeouts
|
|
* and drop IDE performance, and by using a to high value will cause
|
|
* audio playback to scatter.
|
|
* If you know a better value or how to calc it, please let me know.
|
|
*/
|
|
|
|
/* twice the value written in cy82c693ub datasheet */
|
|
#define BUSMASTER_TIMEOUT 0x50
|
|
/*
|
|
* the value above was tested on my machine and it seems to work okay
|
|
*/
|
|
|
|
/* here are the offset definitions for the registers */
|
|
#define CY82_IDE_CMDREG 0x04
|
|
#define CY82_IDE_ADDRSETUP 0x48
|
|
#define CY82_IDE_MASTER_IOR 0x4C
|
|
#define CY82_IDE_MASTER_IOW 0x4D
|
|
#define CY82_IDE_SLAVE_IOR 0x4E
|
|
#define CY82_IDE_SLAVE_IOW 0x4F
|
|
#define CY82_IDE_MASTER_8BIT 0x50
|
|
#define CY82_IDE_SLAVE_8BIT 0x51
|
|
|
|
#define CY82_INDEX_PORT 0x22
|
|
#define CY82_DATA_PORT 0x23
|
|
|
|
#define CY82_INDEX_CHANNEL0 0x30
|
|
#define CY82_INDEX_CHANNEL1 0x31
|
|
#define CY82_INDEX_TIMEOUT 0x32
|
|
|
|
/*
|
|
* set DMA mode a specific channel for CY82C693
|
|
*/
|
|
|
|
static void cy82c693_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
|
|
{
|
|
const u8 mode = drive->dma_mode;
|
|
u8 single = (mode & 0x10) >> 4, index = 0, data = 0;
|
|
|
|
index = hwif->channel ? CY82_INDEX_CHANNEL1 : CY82_INDEX_CHANNEL0;
|
|
|
|
data = (mode & 3) | (single << 2);
|
|
|
|
outb(index, CY82_INDEX_PORT);
|
|
outb(data, CY82_DATA_PORT);
|
|
|
|
/*
|
|
* note: below we set the value for Bus Master IDE TimeOut Register
|
|
* I'm not absolutely sure what this does, but it solved my problem
|
|
* with IDE DMA and sound, so I now can play sound and work with
|
|
* my IDE driver at the same time :-)
|
|
*
|
|
* If you know the correct (best) value for this register please
|
|
* let me know - ASK
|
|
*/
|
|
|
|
data = BUSMASTER_TIMEOUT;
|
|
outb(CY82_INDEX_TIMEOUT, CY82_INDEX_PORT);
|
|
outb(data, CY82_DATA_PORT);
|
|
}
|
|
|
|
static void cy82c693_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
|
|
{
|
|
struct pci_dev *dev = to_pci_dev(hwif->dev);
|
|
int bus_speed = ide_pci_clk ? ide_pci_clk : 33;
|
|
const unsigned long T = 1000000 / bus_speed;
|
|
unsigned int addrCtrl;
|
|
struct ide_timing t;
|
|
u8 time_16, time_8;
|
|
|
|
/* select primary or secondary channel */
|
|
if (drive->dn > 1) { /* drive is on the secondary channel */
|
|
dev = pci_get_slot(dev->bus, dev->devfn+1);
|
|
if (!dev) {
|
|
printk(KERN_ERR "%s: tune_drive: "
|
|
"Cannot find secondary interface!\n",
|
|
drive->name);
|
|
return;
|
|
}
|
|
}
|
|
|
|
ide_timing_compute(drive, drive->pio_mode, &t, T, 1);
|
|
|
|
time_16 = clamp_val(t.recover - 1, 0, 15) |
|
|
(clamp_val(t.active - 1, 0, 15) << 4);
|
|
time_8 = clamp_val(t.act8b - 1, 0, 15) |
|
|
(clamp_val(t.rec8b - 1, 0, 15) << 4);
|
|
|
|
/* now let's write the clocks registers */
|
|
if ((drive->dn & 1) == 0) {
|
|
/*
|
|
* set master drive
|
|
* address setup control register
|
|
* is 32 bit !!!
|
|
*/
|
|
pci_read_config_dword(dev, CY82_IDE_ADDRSETUP, &addrCtrl);
|
|
|
|
addrCtrl &= (~0xF);
|
|
addrCtrl |= clamp_val(t.setup - 1, 0, 15);
|
|
pci_write_config_dword(dev, CY82_IDE_ADDRSETUP, addrCtrl);
|
|
|
|
/* now let's set the remaining registers */
|
|
pci_write_config_byte(dev, CY82_IDE_MASTER_IOR, time_16);
|
|
pci_write_config_byte(dev, CY82_IDE_MASTER_IOW, time_16);
|
|
pci_write_config_byte(dev, CY82_IDE_MASTER_8BIT, time_8);
|
|
} else {
|
|
/*
|
|
* set slave drive
|
|
* address setup control register
|
|
* is 32 bit !!!
|
|
*/
|
|
pci_read_config_dword(dev, CY82_IDE_ADDRSETUP, &addrCtrl);
|
|
|
|
addrCtrl &= (~0xF0);
|
|
addrCtrl |= (clamp_val(t.setup - 1, 0, 15) << 4);
|
|
pci_write_config_dword(dev, CY82_IDE_ADDRSETUP, addrCtrl);
|
|
|
|
/* now let's set the remaining registers */
|
|
pci_write_config_byte(dev, CY82_IDE_SLAVE_IOR, time_16);
|
|
pci_write_config_byte(dev, CY82_IDE_SLAVE_IOW, time_16);
|
|
pci_write_config_byte(dev, CY82_IDE_SLAVE_8BIT, time_8);
|
|
}
|
|
if (drive->dn > 1)
|
|
pci_dev_put(dev);
|
|
}
|
|
|
|
static void __devinit init_iops_cy82c693(ide_hwif_t *hwif)
|
|
{
|
|
static ide_hwif_t *primary;
|
|
struct pci_dev *dev = to_pci_dev(hwif->dev);
|
|
|
|
if (PCI_FUNC(dev->devfn) == 1)
|
|
primary = hwif;
|
|
else {
|
|
hwif->mate = primary;
|
|
hwif->channel = 1;
|
|
}
|
|
}
|
|
|
|
static const struct ide_port_ops cy82c693_port_ops = {
|
|
.set_pio_mode = cy82c693_set_pio_mode,
|
|
.set_dma_mode = cy82c693_set_dma_mode,
|
|
};
|
|
|
|
static const struct ide_port_info cy82c693_chipset __devinitdata = {
|
|
.name = DRV_NAME,
|
|
.init_iops = init_iops_cy82c693,
|
|
.port_ops = &cy82c693_port_ops,
|
|
.host_flags = IDE_HFLAG_SINGLE,
|
|
.pio_mask = ATA_PIO4,
|
|
.swdma_mask = ATA_SWDMA2,
|
|
.mwdma_mask = ATA_MWDMA2,
|
|
};
|
|
|
|
static int __devinit cy82c693_init_one(struct pci_dev *dev, const struct pci_device_id *id)
|
|
{
|
|
struct pci_dev *dev2;
|
|
int ret = -ENODEV;
|
|
|
|
/* CY82C693 is more than only a IDE controller.
|
|
Function 1 is primary IDE channel, function 2 - secondary. */
|
|
if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE &&
|
|
PCI_FUNC(dev->devfn) == 1) {
|
|
dev2 = pci_get_slot(dev->bus, dev->devfn + 1);
|
|
ret = ide_pci_init_two(dev, dev2, &cy82c693_chipset, NULL);
|
|
if (ret)
|
|
pci_dev_put(dev2);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static void __devexit cy82c693_remove(struct pci_dev *dev)
|
|
{
|
|
struct ide_host *host = pci_get_drvdata(dev);
|
|
struct pci_dev *dev2 = host->dev[1] ? to_pci_dev(host->dev[1]) : NULL;
|
|
|
|
ide_pci_remove(dev);
|
|
pci_dev_put(dev2);
|
|
}
|
|
|
|
static const struct pci_device_id cy82c693_pci_tbl[] = {
|
|
{ PCI_VDEVICE(CONTAQ, PCI_DEVICE_ID_CONTAQ_82C693), 0 },
|
|
{ 0, },
|
|
};
|
|
MODULE_DEVICE_TABLE(pci, cy82c693_pci_tbl);
|
|
|
|
static struct pci_driver cy82c693_pci_driver = {
|
|
.name = "Cypress_IDE",
|
|
.id_table = cy82c693_pci_tbl,
|
|
.probe = cy82c693_init_one,
|
|
.remove = __devexit_p(cy82c693_remove),
|
|
.suspend = ide_pci_suspend,
|
|
.resume = ide_pci_resume,
|
|
};
|
|
|
|
static int __init cy82c693_ide_init(void)
|
|
{
|
|
return ide_pci_register_driver(&cy82c693_pci_driver);
|
|
}
|
|
|
|
static void __exit cy82c693_ide_exit(void)
|
|
{
|
|
pci_unregister_driver(&cy82c693_pci_driver);
|
|
}
|
|
|
|
module_init(cy82c693_ide_init);
|
|
module_exit(cy82c693_ide_exit);
|
|
|
|
MODULE_AUTHOR("Andreas Krebs, Andre Hedrick, Bartlomiej Zolnierkiewicz");
|
|
MODULE_DESCRIPTION("PCI driver module for the Cypress CY82C693 IDE");
|
|
MODULE_LICENSE("GPL");
|