393 lines
9.9 KiB
C
393 lines
9.9 KiB
C
/*
|
|
* pata_pdc202xx_old.c - Promise PDC202xx PATA for new ATA layer
|
|
* (C) 2005 Red Hat Inc
|
|
* Alan Cox <alan@lxorguk.ukuu.org.uk>
|
|
* (C) 2007,2009,2010 Bartlomiej Zolnierkiewicz
|
|
*
|
|
* Based in part on linux/drivers/ide/pci/pdc202xx_old.c
|
|
*
|
|
* First cut with LBA48/ATAPI
|
|
*
|
|
* TODO:
|
|
* Channel interlock/reset on both required ?
|
|
*/
|
|
|
|
#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>
|
|
|
|
#define DRV_NAME "pata_pdc202xx_old"
|
|
#define DRV_VERSION "0.4.3"
|
|
|
|
static int pdc2026x_cable_detect(struct ata_port *ap)
|
|
{
|
|
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
|
|
u16 cis;
|
|
|
|
pci_read_config_word(pdev, 0x50, &cis);
|
|
if (cis & (1 << (10 + ap->port_no)))
|
|
return ATA_CBL_PATA40;
|
|
return ATA_CBL_PATA80;
|
|
}
|
|
|
|
static void pdc202xx_exec_command(struct ata_port *ap,
|
|
const struct ata_taskfile *tf)
|
|
{
|
|
DPRINTK("ata%u: cmd 0x%X\n", ap->print_id, tf->command);
|
|
|
|
iowrite8(tf->command, ap->ioaddr.command_addr);
|
|
ndelay(400);
|
|
}
|
|
|
|
static bool pdc202xx_irq_check(struct ata_port *ap)
|
|
{
|
|
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
|
|
unsigned long master = pci_resource_start(pdev, 4);
|
|
u8 sc1d = inb(master + 0x1d);
|
|
|
|
if (ap->port_no) {
|
|
/*
|
|
* bit 7: error, bit 6: interrupting,
|
|
* bit 5: FIFO full, bit 4: FIFO empty
|
|
*/
|
|
return sc1d & 0x40;
|
|
} else {
|
|
/*
|
|
* bit 3: error, bit 2: interrupting,
|
|
* bit 1: FIFO full, bit 0: FIFO empty
|
|
*/
|
|
return sc1d & 0x04;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pdc202xx_configure_piomode - set chip PIO timing
|
|
* @ap: ATA interface
|
|
* @adev: ATA device
|
|
* @pio: PIO mode
|
|
*
|
|
* Called to do the PIO mode setup. Our timing registers are shared
|
|
* so a configure_dmamode call will undo any work we do here and vice
|
|
* versa
|
|
*/
|
|
|
|
static void pdc202xx_configure_piomode(struct ata_port *ap, struct ata_device *adev, int pio)
|
|
{
|
|
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
|
|
int port = 0x60 + 8 * ap->port_no + 4 * adev->devno;
|
|
static u16 pio_timing[5] = {
|
|
0x0913, 0x050C , 0x0308, 0x0206, 0x0104
|
|
};
|
|
u8 r_ap, r_bp;
|
|
|
|
pci_read_config_byte(pdev, port, &r_ap);
|
|
pci_read_config_byte(pdev, port + 1, &r_bp);
|
|
r_ap &= ~0x3F; /* Preserve ERRDY_EN, SYNC_IN */
|
|
r_bp &= ~0x1F;
|
|
r_ap |= (pio_timing[pio] >> 8);
|
|
r_bp |= (pio_timing[pio] & 0xFF);
|
|
|
|
if (ata_pio_need_iordy(adev))
|
|
r_ap |= 0x20; /* IORDY enable */
|
|
if (adev->class == ATA_DEV_ATA)
|
|
r_ap |= 0x10; /* FIFO enable */
|
|
pci_write_config_byte(pdev, port, r_ap);
|
|
pci_write_config_byte(pdev, port + 1, r_bp);
|
|
}
|
|
|
|
/**
|
|
* pdc202xx_set_piomode - set initial PIO mode data
|
|
* @ap: ATA interface
|
|
* @adev: ATA device
|
|
*
|
|
* Called to do the PIO mode setup. Our timing registers are shared
|
|
* but we want to set the PIO timing by default.
|
|
*/
|
|
|
|
static void pdc202xx_set_piomode(struct ata_port *ap, struct ata_device *adev)
|
|
{
|
|
pdc202xx_configure_piomode(ap, adev, adev->pio_mode - XFER_PIO_0);
|
|
}
|
|
|
|
/**
|
|
* pdc202xx_configure_dmamode - set DMA mode in chip
|
|
* @ap: ATA interface
|
|
* @adev: ATA device
|
|
*
|
|
* Load DMA cycle times into the chip ready for a DMA transfer
|
|
* to occur.
|
|
*/
|
|
|
|
static void pdc202xx_set_dmamode(struct ata_port *ap, struct ata_device *adev)
|
|
{
|
|
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
|
|
int port = 0x60 + 8 * ap->port_no + 4 * adev->devno;
|
|
static u8 udma_timing[6][2] = {
|
|
{ 0x60, 0x03 }, /* 33 Mhz Clock */
|
|
{ 0x40, 0x02 },
|
|
{ 0x20, 0x01 },
|
|
{ 0x40, 0x02 }, /* 66 Mhz Clock */
|
|
{ 0x20, 0x01 },
|
|
{ 0x20, 0x01 }
|
|
};
|
|
static u8 mdma_timing[3][2] = {
|
|
{ 0xe0, 0x0f },
|
|
{ 0x60, 0x04 },
|
|
{ 0x60, 0x03 },
|
|
};
|
|
u8 r_bp, r_cp;
|
|
|
|
pci_read_config_byte(pdev, port + 1, &r_bp);
|
|
pci_read_config_byte(pdev, port + 2, &r_cp);
|
|
|
|
r_bp &= ~0xE0;
|
|
r_cp &= ~0x0F;
|
|
|
|
if (adev->dma_mode >= XFER_UDMA_0) {
|
|
int speed = adev->dma_mode - XFER_UDMA_0;
|
|
r_bp |= udma_timing[speed][0];
|
|
r_cp |= udma_timing[speed][1];
|
|
|
|
} else {
|
|
int speed = adev->dma_mode - XFER_MW_DMA_0;
|
|
r_bp |= mdma_timing[speed][0];
|
|
r_cp |= mdma_timing[speed][1];
|
|
}
|
|
pci_write_config_byte(pdev, port + 1, r_bp);
|
|
pci_write_config_byte(pdev, port + 2, r_cp);
|
|
|
|
}
|
|
|
|
/**
|
|
* pdc2026x_bmdma_start - DMA engine begin
|
|
* @qc: ATA command
|
|
*
|
|
* In UDMA3 or higher we have to clock switch for the duration of the
|
|
* DMA transfer sequence.
|
|
*
|
|
* Note: The host lock held by the libata layer protects
|
|
* us from two channels both trying to set DMA bits at once
|
|
*/
|
|
|
|
static void pdc2026x_bmdma_start(struct ata_queued_cmd *qc)
|
|
{
|
|
struct ata_port *ap = qc->ap;
|
|
struct ata_device *adev = qc->dev;
|
|
struct ata_taskfile *tf = &qc->tf;
|
|
int sel66 = ap->port_no ? 0x08: 0x02;
|
|
|
|
void __iomem *master = ap->host->ports[0]->ioaddr.bmdma_addr;
|
|
void __iomem *clock = master + 0x11;
|
|
void __iomem *atapi_reg = master + 0x20 + (4 * ap->port_no);
|
|
|
|
u32 len;
|
|
|
|
/* Check we keep host level locking here */
|
|
if (adev->dma_mode > XFER_UDMA_2)
|
|
iowrite8(ioread8(clock) | sel66, clock);
|
|
else
|
|
iowrite8(ioread8(clock) & ~sel66, clock);
|
|
|
|
/* The DMA clocks may have been trashed by a reset. FIXME: make conditional
|
|
and move to qc_issue ? */
|
|
pdc202xx_set_dmamode(ap, qc->dev);
|
|
|
|
/* Cases the state machine will not complete correctly without help */
|
|
if ((tf->flags & ATA_TFLAG_LBA48) || tf->protocol == ATAPI_PROT_DMA) {
|
|
len = qc->nbytes / 2;
|
|
|
|
if (tf->flags & ATA_TFLAG_WRITE)
|
|
len |= 0x06000000;
|
|
else
|
|
len |= 0x05000000;
|
|
|
|
iowrite32(len, atapi_reg);
|
|
}
|
|
|
|
/* Activate DMA */
|
|
ata_bmdma_start(qc);
|
|
}
|
|
|
|
/**
|
|
* pdc2026x_bmdma_end - DMA engine stop
|
|
* @qc: ATA command
|
|
*
|
|
* After a DMA completes we need to put the clock back to 33MHz for
|
|
* PIO timings.
|
|
*
|
|
* Note: The host lock held by the libata layer protects
|
|
* us from two channels both trying to set DMA bits at once
|
|
*/
|
|
|
|
static void pdc2026x_bmdma_stop(struct ata_queued_cmd *qc)
|
|
{
|
|
struct ata_port *ap = qc->ap;
|
|
struct ata_device *adev = qc->dev;
|
|
struct ata_taskfile *tf = &qc->tf;
|
|
|
|
int sel66 = ap->port_no ? 0x08: 0x02;
|
|
/* The clock bits are in the same register for both channels */
|
|
void __iomem *master = ap->host->ports[0]->ioaddr.bmdma_addr;
|
|
void __iomem *clock = master + 0x11;
|
|
void __iomem *atapi_reg = master + 0x20 + (4 * ap->port_no);
|
|
|
|
/* Cases the state machine will not complete correctly */
|
|
if (tf->protocol == ATAPI_PROT_DMA || (tf->flags & ATA_TFLAG_LBA48)) {
|
|
iowrite32(0, atapi_reg);
|
|
iowrite8(ioread8(clock) & ~sel66, clock);
|
|
}
|
|
/* Flip back to 33Mhz for PIO */
|
|
if (adev->dma_mode > XFER_UDMA_2)
|
|
iowrite8(ioread8(clock) & ~sel66, clock);
|
|
ata_bmdma_stop(qc);
|
|
pdc202xx_set_piomode(ap, adev);
|
|
}
|
|
|
|
/**
|
|
* pdc2026x_dev_config - device setup hook
|
|
* @adev: newly found device
|
|
*
|
|
* Perform chip specific early setup. We need to lock the transfer
|
|
* sizes to 8bit to avoid making the state engine on the 2026x cards
|
|
* barf.
|
|
*/
|
|
|
|
static void pdc2026x_dev_config(struct ata_device *adev)
|
|
{
|
|
adev->max_sectors = 256;
|
|
}
|
|
|
|
static int pdc2026x_port_start(struct ata_port *ap)
|
|
{
|
|
void __iomem *bmdma = ap->ioaddr.bmdma_addr;
|
|
if (bmdma) {
|
|
/* Enable burst mode */
|
|
u8 burst = ioread8(bmdma + 0x1f);
|
|
iowrite8(burst | 0x01, bmdma + 0x1f);
|
|
}
|
|
return ata_bmdma_port_start(ap);
|
|
}
|
|
|
|
/**
|
|
* pdc2026x_check_atapi_dma - Check whether ATAPI DMA can be supported for this command
|
|
* @qc: Metadata associated with taskfile to check
|
|
*
|
|
* Just say no - not supported on older Promise.
|
|
*
|
|
* LOCKING:
|
|
* None (inherited from caller).
|
|
*
|
|
* RETURNS: 0 when ATAPI DMA can be used
|
|
* 1 otherwise
|
|
*/
|
|
|
|
static int pdc2026x_check_atapi_dma(struct ata_queued_cmd *qc)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static struct scsi_host_template pdc202xx_sht = {
|
|
ATA_BMDMA_SHT(DRV_NAME),
|
|
};
|
|
|
|
static struct ata_port_operations pdc2024x_port_ops = {
|
|
.inherits = &ata_bmdma_port_ops,
|
|
|
|
.cable_detect = ata_cable_40wire,
|
|
.set_piomode = pdc202xx_set_piomode,
|
|
.set_dmamode = pdc202xx_set_dmamode,
|
|
|
|
.sff_exec_command = pdc202xx_exec_command,
|
|
.sff_irq_check = pdc202xx_irq_check,
|
|
};
|
|
|
|
static struct ata_port_operations pdc2026x_port_ops = {
|
|
.inherits = &pdc2024x_port_ops,
|
|
|
|
.check_atapi_dma = pdc2026x_check_atapi_dma,
|
|
.bmdma_start = pdc2026x_bmdma_start,
|
|
.bmdma_stop = pdc2026x_bmdma_stop,
|
|
|
|
.cable_detect = pdc2026x_cable_detect,
|
|
.dev_config = pdc2026x_dev_config,
|
|
|
|
.port_start = pdc2026x_port_start,
|
|
|
|
.sff_exec_command = pdc202xx_exec_command,
|
|
.sff_irq_check = pdc202xx_irq_check,
|
|
};
|
|
|
|
static int pdc202xx_init_one(struct pci_dev *dev, const struct pci_device_id *id)
|
|
{
|
|
static const struct ata_port_info info[3] = {
|
|
{
|
|
.flags = ATA_FLAG_SLAVE_POSS,
|
|
.pio_mask = ATA_PIO4,
|
|
.mwdma_mask = ATA_MWDMA2,
|
|
.udma_mask = ATA_UDMA2,
|
|
.port_ops = &pdc2024x_port_ops
|
|
},
|
|
{
|
|
.flags = ATA_FLAG_SLAVE_POSS,
|
|
.pio_mask = ATA_PIO4,
|
|
.mwdma_mask = ATA_MWDMA2,
|
|
.udma_mask = ATA_UDMA4,
|
|
.port_ops = &pdc2026x_port_ops
|
|
},
|
|
{
|
|
.flags = ATA_FLAG_SLAVE_POSS,
|
|
.pio_mask = ATA_PIO4,
|
|
.mwdma_mask = ATA_MWDMA2,
|
|
.udma_mask = ATA_UDMA5,
|
|
.port_ops = &pdc2026x_port_ops
|
|
}
|
|
|
|
};
|
|
const struct ata_port_info *ppi[] = { &info[id->driver_data], NULL };
|
|
|
|
if (dev->device == PCI_DEVICE_ID_PROMISE_20265) {
|
|
struct pci_dev *bridge = dev->bus->self;
|
|
/* Don't grab anything behind a Promise I2O RAID */
|
|
if (bridge && bridge->vendor == PCI_VENDOR_ID_INTEL) {
|
|
if (bridge->device == PCI_DEVICE_ID_INTEL_I960)
|
|
return -ENODEV;
|
|
if (bridge->device == PCI_DEVICE_ID_INTEL_I960RM)
|
|
return -ENODEV;
|
|
}
|
|
}
|
|
return ata_pci_bmdma_init_one(dev, ppi, &pdc202xx_sht, NULL, 0);
|
|
}
|
|
|
|
static const struct pci_device_id pdc202xx[] = {
|
|
{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20246), 0 },
|
|
{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20262), 1 },
|
|
{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20263), 1 },
|
|
{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20265), 2 },
|
|
{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20267), 2 },
|
|
|
|
{ },
|
|
};
|
|
|
|
static struct pci_driver pdc202xx_pci_driver = {
|
|
.name = DRV_NAME,
|
|
.id_table = pdc202xx,
|
|
.probe = pdc202xx_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(pdc202xx_pci_driver);
|
|
|
|
MODULE_AUTHOR("Alan Cox");
|
|
MODULE_DESCRIPTION("low-level driver for Promise 2024x and 20262-20267");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DEVICE_TABLE(pci, pdc202xx);
|
|
MODULE_VERSION(DRV_VERSION);
|