228 lines
6.4 KiB
C
228 lines
6.4 KiB
C
/*
|
|
* pata-cs5535.c - CS5535 PATA for new ATA layer
|
|
* (C) 2005-2006 Red Hat Inc
|
|
* Alan Cox <alan@lxorguk.ukuu.org.uk>
|
|
*
|
|
* based upon cs5535.c from AMD <Jens.Altmann@amd.com> as cleaned up and
|
|
* made readable and Linux style by Wolfgang Zuleger <wolfgang.zuleger@gmx.de>
|
|
* and Alexander Kiausch <alex.kiausch@t-online.de>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
* Loosely based on the piix & svwks drivers.
|
|
*
|
|
* Documentation:
|
|
* Available from AMD web site.
|
|
* TODO
|
|
* Review errata to see if serializing is necessary
|
|
*/
|
|
|
|
#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 <asm/msr.h>
|
|
|
|
#define DRV_NAME "pata_cs5535"
|
|
#define DRV_VERSION "0.2.12"
|
|
|
|
/*
|
|
* The Geode (Aka Athlon GX now) uses an internal MSR based
|
|
* bus system for control. Demented but there you go.
|
|
*/
|
|
|
|
#define MSR_ATAC_BASE 0x51300000
|
|
#define ATAC_GLD_MSR_CAP (MSR_ATAC_BASE+0)
|
|
#define ATAC_GLD_MSR_CONFIG (MSR_ATAC_BASE+0x01)
|
|
#define ATAC_GLD_MSR_SMI (MSR_ATAC_BASE+0x02)
|
|
#define ATAC_GLD_MSR_ERROR (MSR_ATAC_BASE+0x03)
|
|
#define ATAC_GLD_MSR_PM (MSR_ATAC_BASE+0x04)
|
|
#define ATAC_GLD_MSR_DIAG (MSR_ATAC_BASE+0x05)
|
|
#define ATAC_IO_BAR (MSR_ATAC_BASE+0x08)
|
|
#define ATAC_RESET (MSR_ATAC_BASE+0x10)
|
|
#define ATAC_CH0D0_PIO (MSR_ATAC_BASE+0x20)
|
|
#define ATAC_CH0D0_DMA (MSR_ATAC_BASE+0x21)
|
|
#define ATAC_CH0D1_PIO (MSR_ATAC_BASE+0x22)
|
|
#define ATAC_CH0D1_DMA (MSR_ATAC_BASE+0x23)
|
|
#define ATAC_PCI_ABRTERR (MSR_ATAC_BASE+0x24)
|
|
|
|
#define ATAC_BM0_CMD_PRIM 0x00
|
|
#define ATAC_BM0_STS_PRIM 0x02
|
|
#define ATAC_BM0_PRD 0x04
|
|
|
|
#define CS5535_CABLE_DETECT 0x48
|
|
|
|
/**
|
|
* cs5535_cable_detect - detect cable type
|
|
* @ap: Port to detect on
|
|
*
|
|
* Perform cable detection for ATA66 capable cable. Return a libata
|
|
* cable type.
|
|
*/
|
|
|
|
static int cs5535_cable_detect(struct ata_port *ap)
|
|
{
|
|
u8 cable;
|
|
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
|
|
|
|
pci_read_config_byte(pdev, CS5535_CABLE_DETECT, &cable);
|
|
if (cable & 1)
|
|
return ATA_CBL_PATA80;
|
|
else
|
|
return ATA_CBL_PATA40;
|
|
}
|
|
|
|
/**
|
|
* cs5535_set_piomode - PIO setup
|
|
* @ap: ATA interface
|
|
* @adev: device on the interface
|
|
*
|
|
* Set our PIO requirements. The CS5535 is pretty clean about all this
|
|
*/
|
|
|
|
static void cs5535_set_piomode(struct ata_port *ap, struct ata_device *adev)
|
|
{
|
|
static const u16 pio_timings[5] = {
|
|
0xF7F4, 0xF173, 0x8141, 0x5131, 0x1131
|
|
};
|
|
static const u16 pio_cmd_timings[5] = {
|
|
0xF7F4, 0x53F3, 0x13F1, 0x5131, 0x1131
|
|
};
|
|
u32 reg, dummy;
|
|
struct ata_device *pair = ata_dev_pair(adev);
|
|
|
|
int mode = adev->pio_mode - XFER_PIO_0;
|
|
int cmdmode = mode;
|
|
|
|
/* Command timing has to be for the lowest of the pair of devices */
|
|
if (pair) {
|
|
int pairmode = pair->pio_mode - XFER_PIO_0;
|
|
cmdmode = min(mode, pairmode);
|
|
/* Write the other drive timing register if it changed */
|
|
if (cmdmode < pairmode)
|
|
wrmsr(ATAC_CH0D0_PIO + 2 * pair->devno,
|
|
pio_cmd_timings[cmdmode] << 16 | pio_timings[pairmode], 0);
|
|
}
|
|
/* Write the drive timing register */
|
|
wrmsr(ATAC_CH0D0_PIO + 2 * adev->devno,
|
|
pio_cmd_timings[cmdmode] << 16 | pio_timings[mode], 0);
|
|
|
|
/* Set the PIO "format 1" bit in the DMA timing register */
|
|
rdmsr(ATAC_CH0D0_DMA + 2 * adev->devno, reg, dummy);
|
|
wrmsr(ATAC_CH0D0_DMA + 2 * adev->devno, reg | 0x80000000UL, 0);
|
|
}
|
|
|
|
/**
|
|
* cs5535_set_dmamode - DMA timing setup
|
|
* @ap: ATA interface
|
|
* @adev: Device being configured
|
|
*
|
|
*/
|
|
|
|
static void cs5535_set_dmamode(struct ata_port *ap, struct ata_device *adev)
|
|
{
|
|
static const u32 udma_timings[5] = {
|
|
0x7F7436A1, 0x7F733481, 0x7F723261, 0x7F713161, 0x7F703061
|
|
};
|
|
static const u32 mwdma_timings[3] = {
|
|
0x7F0FFFF3, 0x7F035352, 0x7F024241
|
|
};
|
|
u32 reg, dummy;
|
|
int mode = adev->dma_mode;
|
|
|
|
rdmsr(ATAC_CH0D0_DMA + 2 * adev->devno, reg, dummy);
|
|
reg &= 0x80000000UL;
|
|
if (mode >= XFER_UDMA_0)
|
|
reg |= udma_timings[mode - XFER_UDMA_0];
|
|
else
|
|
reg |= mwdma_timings[mode - XFER_MW_DMA_0];
|
|
wrmsr(ATAC_CH0D0_DMA + 2 * adev->devno, reg, 0);
|
|
}
|
|
|
|
static struct scsi_host_template cs5535_sht = {
|
|
ATA_BMDMA_SHT(DRV_NAME),
|
|
};
|
|
|
|
static struct ata_port_operations cs5535_port_ops = {
|
|
.inherits = &ata_bmdma_port_ops,
|
|
.cable_detect = cs5535_cable_detect,
|
|
.set_piomode = cs5535_set_piomode,
|
|
.set_dmamode = cs5535_set_dmamode,
|
|
};
|
|
|
|
/**
|
|
* cs5535_init_one - Initialise a CS5530
|
|
* @dev: PCI device
|
|
* @id: Entry in match table
|
|
*
|
|
* Install a driver for the newly found CS5530 companion chip. Most of
|
|
* this is just housekeeping. We have to set the chip up correctly and
|
|
* turn off various bits of emulation magic.
|
|
*/
|
|
|
|
static int cs5535_init_one(struct pci_dev *dev, const struct pci_device_id *id)
|
|
{
|
|
static const struct ata_port_info info = {
|
|
.flags = ATA_FLAG_SLAVE_POSS,
|
|
.pio_mask = ATA_PIO4,
|
|
.mwdma_mask = ATA_MWDMA2,
|
|
.udma_mask = ATA_UDMA4,
|
|
.port_ops = &cs5535_port_ops
|
|
};
|
|
const struct ata_port_info *ppi[] = { &info, &ata_dummy_port_info };
|
|
|
|
return ata_pci_bmdma_init_one(dev, ppi, &cs5535_sht, NULL, 0);
|
|
}
|
|
|
|
static const struct pci_device_id cs5535[] = {
|
|
{ PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_CS5535_IDE), },
|
|
{ PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_CS5535_IDE), },
|
|
|
|
{ },
|
|
};
|
|
|
|
static struct pci_driver cs5535_pci_driver = {
|
|
.name = DRV_NAME,
|
|
.id_table = cs5535,
|
|
.probe = cs5535_init_one,
|
|
.remove = ata_pci_remove_one,
|
|
#ifdef CONFIG_PM
|
|
.suspend = ata_pci_device_suspend,
|
|
.resume = ata_pci_device_resume,
|
|
#endif
|
|
};
|
|
|
|
static int __init cs5535_init(void)
|
|
{
|
|
return pci_register_driver(&cs5535_pci_driver);
|
|
}
|
|
|
|
static void __exit cs5535_exit(void)
|
|
{
|
|
pci_unregister_driver(&cs5535_pci_driver);
|
|
}
|
|
|
|
MODULE_AUTHOR("Alan Cox, Jens Altmann, Wolfgan Zuleger, Alexander Kiausch");
|
|
MODULE_DESCRIPTION("low-level driver for the NS/AMD 5535");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DEVICE_TABLE(pci, cs5535);
|
|
MODULE_VERSION(DRV_VERSION);
|
|
|
|
module_init(cs5535_init);
|
|
module_exit(cs5535_exit);
|