Revision e2f455927b42767ecea5a4eb9bb740686e74c18b authored by Mark Brown on 27 February 2014, 11:26:07 UTC, committed by Mark Brown on 27 February 2014, 11:26:07 UTC
ASoC: Fixes for v3.14 A few fixes, all driver speccific ones. The DaVinci ones aren't as clear as they should be from the subject lines on the commits but they fix issues which will prevent correct operation in some use cases and only affect that particular driver so are reasonably safe. # gpg: Signature made Wed 19 Feb 2014 13:23:13 KST using RSA key ID 7EA229BD # gpg: Good signature from "Mark Brown <broonie@sirena.org.uk>" # gpg: aka "Mark Brown <broonie@debian.org>" # gpg: aka "Mark Brown <broonie@kernel.org>" # gpg: aka "Mark Brown <broonie@tardis.ed.ac.uk>" # gpg: aka "Mark Brown <broonie@linaro.org>" # gpg: aka "Mark Brown <Mark.Brown@linaro.org>"
pata_sch.c
/*
* pata_sch.c - Intel SCH PATA controllers
*
* Copyright (c) 2008 Alek Du <alek.du@intel.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License 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; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
/*
* Supports:
* Intel SCH (AF82US15W, AF82US15L, AF82UL11L) chipsets -- see spec at:
* http://download.intel.com/design/chipsets/embedded/datashts/319537.pdf
*/
#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 <linux/device.h>
#include <scsi/scsi_host.h>
#include <linux/libata.h>
#include <linux/dmi.h>
#define DRV_NAME "pata_sch"
#define DRV_VERSION "0.2"
/* see SCH datasheet page 351 */
enum {
D0TIM = 0x80, /* Device 0 Timing Register */
D1TIM = 0x84, /* Device 1 Timing Register */
PM = 0x07, /* PIO Mode Bit Mask */
MDM = (0x03 << 8), /* Multi-word DMA Mode Bit Mask */
UDM = (0x07 << 16), /* Ultra DMA Mode Bit Mask */
PPE = (1 << 30), /* Prefetch/Post Enable */
USD = (1 << 31), /* Use Synchronous DMA */
};
static int sch_init_one(struct pci_dev *pdev,
const struct pci_device_id *ent);
static void sch_set_piomode(struct ata_port *ap, struct ata_device *adev);
static void sch_set_dmamode(struct ata_port *ap, struct ata_device *adev);
static const struct pci_device_id sch_pci_tbl[] = {
/* Intel SCH PATA Controller */
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_SCH_IDE), 0 },
{ } /* terminate list */
};
static struct pci_driver sch_pci_driver = {
.name = DRV_NAME,
.id_table = sch_pci_tbl,
.probe = sch_init_one,
.remove = ata_pci_remove_one,
#ifdef CONFIG_PM
.suspend = ata_pci_device_suspend,
.resume = ata_pci_device_resume,
#endif
};
static struct scsi_host_template sch_sht = {
ATA_BMDMA_SHT(DRV_NAME),
};
static struct ata_port_operations sch_pata_ops = {
.inherits = &ata_bmdma_port_ops,
.cable_detect = ata_cable_unknown,
.set_piomode = sch_set_piomode,
.set_dmamode = sch_set_dmamode,
};
static struct ata_port_info sch_port_info = {
.flags = ATA_FLAG_SLAVE_POSS,
.pio_mask = ATA_PIO4,
.mwdma_mask = ATA_MWDMA2,
.udma_mask = ATA_UDMA5,
.port_ops = &sch_pata_ops,
};
MODULE_AUTHOR("Alek Du <alek.du@intel.com>");
MODULE_DESCRIPTION("SCSI low-level driver for Intel SCH PATA controllers");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, sch_pci_tbl);
MODULE_VERSION(DRV_VERSION);
/**
* sch_set_piomode - Initialize host controller PATA PIO timings
* @ap: Port whose timings we are configuring
* @adev: ATA device
*
* Set PIO mode for device, in host controller PCI config space.
*
* LOCKING:
* None (inherited from caller).
*/
static void sch_set_piomode(struct ata_port *ap, struct ata_device *adev)
{
unsigned int pio = adev->pio_mode - XFER_PIO_0;
struct pci_dev *dev = to_pci_dev(ap->host->dev);
unsigned int port = adev->devno ? D1TIM : D0TIM;
unsigned int data;
pci_read_config_dword(dev, port, &data);
/* see SCH datasheet page 351 */
/* set PIO mode */
data &= ~(PM | PPE);
data |= pio;
/* enable PPE for block device */
if (adev->class == ATA_DEV_ATA)
data |= PPE;
pci_write_config_dword(dev, port, data);
}
/**
* sch_set_dmamode - Initialize host controller PATA DMA timings
* @ap: Port whose timings we are configuring
* @adev: ATA device
*
* Set MW/UDMA mode for device, in host controller PCI config space.
*
* LOCKING:
* None (inherited from caller).
*/
static void sch_set_dmamode(struct ata_port *ap, struct ata_device *adev)
{
unsigned int dma_mode = adev->dma_mode;
struct pci_dev *dev = to_pci_dev(ap->host->dev);
unsigned int port = adev->devno ? D1TIM : D0TIM;
unsigned int data;
pci_read_config_dword(dev, port, &data);
/* see SCH datasheet page 351 */
if (dma_mode >= XFER_UDMA_0) {
/* enable Synchronous DMA mode */
data |= USD;
data &= ~UDM;
data |= (dma_mode - XFER_UDMA_0) << 16;
} else { /* must be MWDMA mode, since we masked SWDMA already */
data &= ~(USD | MDM);
data |= (dma_mode - XFER_MW_DMA_0) << 8;
}
pci_write_config_dword(dev, port, data);
}
/**
* sch_init_one - Register SCH ATA PCI device with kernel services
* @pdev: PCI device to register
* @ent: Entry in sch_pci_tbl matching with @pdev
*
* LOCKING:
* Inherited from PCI layer (may sleep).
*
* RETURNS:
* Zero on success, or -ERRNO value.
*/
static int sch_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
{
const struct ata_port_info *ppi[] = { &sch_port_info, NULL };
ata_print_version_once(&pdev->dev, DRV_VERSION);
return ata_pci_bmdma_init_one(pdev, ppi, &sch_sht, NULL, 0);
}
module_pci_driver(sch_pci_driver);
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