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Release 4.10 drivers/ata/pata_cs5535.c

Directory: drivers/ata
/*
 * 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/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; }

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/** * 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); }

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/** * 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); }

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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); }

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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_SLEEP .suspend = ata_pci_device_suspend, .resume = ata_pci_device_resume, #endif }; module_pci_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);

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Directory: drivers/ata
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