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73fd456b2d
linux/drivers/ata/sata_promise.c
Mikael Pettersson 73fd456b2d sata_promise: ATAPI cleanup 
Here's a cleanup for yesterday's sata_promise ATAPI patch:
- add and use a symbolic constant for the altstatus register
- check return status from ata_busy_wait()
- add missing newline in a warning printk()
- update comment in pdc_issue_atapi_pkt_cmd() to clarify
  that the maybe-wait-for-INT issue cannot occur in the
  current driver, but may occur if the driver starts issuing
  ATAPI non-DMA commands as PDC packets

Signed-off-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-02-09 17:39:33 -05:00

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/*
* sata_promise.c - Promise SATA
*
* Maintained by: Jeff Garzik <jgarzik@pobox.com>
* Please ALWAYS copy linux-ide@vger.kernel.org
* on emails.
*
* Copyright 2003-2004 Red Hat, Inc.
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* 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.
*
*
* libata documentation is available via 'make {ps|pdf}docs',
* as Documentation/DocBook/libata.*
*
* Hardware information only available under NDA.
*
*/
#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/interrupt.h>
#include <linux/sched.h>
#include <linux/device.h>
#include <scsi/scsi.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_cmnd.h>
#include <linux/libata.h>
#include <asm/io.h>
#include "sata_promise.h"
#define DRV_NAME "sata_promise"
#define DRV_VERSION "1.05"
enum {
/* register offsets */
PDC_FEATURE = 0x04, /* Feature/Error reg (per port) */
PDC_SECTOR_COUNT = 0x08, /* Sector count reg (per port) */
PDC_SECTOR_NUMBER = 0x0C, /* Sector number reg (per port) */
PDC_CYLINDER_LOW = 0x10, /* Cylinder low reg (per port) */
PDC_CYLINDER_HIGH = 0x14, /* Cylinder high reg (per port) */
PDC_DEVICE = 0x18, /* Device/Head reg (per port) */
PDC_COMMAND = 0x1C, /* Command/status reg (per port) */
PDC_ALTSTATUS = 0x38, /* Alternate-status/device-control reg (per port) */
PDC_PKT_SUBMIT = 0x40, /* Command packet pointer addr */
PDC_INT_SEQMASK = 0x40, /* Mask of asserted SEQ INTs */
PDC_FLASH_CTL = 0x44, /* Flash control register */
PDC_GLOBAL_CTL = 0x48, /* Global control/status (per port) */
PDC_CTLSTAT = 0x60, /* IDE control and status (per port) */
PDC_SATA_PLUG_CSR = 0x6C, /* SATA Plug control/status reg */
PDC2_SATA_PLUG_CSR = 0x60, /* SATAII Plug control/status reg */
PDC_TBG_MODE = 0x41C, /* TBG mode (not SATAII) */
PDC_SLEW_CTL = 0x470, /* slew rate control reg (not SATAII) */
PDC_ERR_MASK = (1<<19) | (1<<20) | (1<<21) | (1<<22) |
(1<<8) | (1<<9) | (1<<10),
board_2037x = 0, /* FastTrak S150 TX2plus */
board_20319 = 1, /* FastTrak S150 TX4 */
board_20619 = 2, /* FastTrak TX4000 */
board_2057x = 3, /* SATAII150 Tx2plus */
board_40518 = 4, /* SATAII150 Tx4 */
PDC_HAS_PATA = (1 << 1), /* PDC20375/20575 has PATA */
/* Sequence counter control registers bit definitions */
PDC_SEQCNTRL_INT_MASK = (1 << 5), /* Sequence Interrupt Mask */
/* Feature register values */
PDC_FEATURE_ATAPI_PIO = 0x00, /* ATAPI data xfer by PIO */
PDC_FEATURE_ATAPI_DMA = 0x01, /* ATAPI data xfer by DMA */
/* Device/Head register values */
PDC_DEVICE_SATA = 0xE0, /* Device/Head value for SATA devices */
/* PDC_CTLSTAT bit definitions */
PDC_DMA_ENABLE = (1 << 7),
PDC_IRQ_DISABLE = (1 << 10),
PDC_RESET = (1 << 11), /* HDMA reset */
PDC_COMMON_FLAGS = ATA_FLAG_NO_LEGACY |
ATA_FLAG_MMIO |
ATA_FLAG_PIO_POLLING,
/* hp->flags bits */
PDC_FLAG_GEN_II = (1 << 0),
};
struct pdc_port_priv {
u8 *pkt;
dma_addr_t pkt_dma;
};
struct pdc_host_priv {
unsigned long flags;
unsigned long port_flags[ATA_MAX_PORTS];
};
static u32 pdc_sata_scr_read (struct ata_port *ap, unsigned int sc_reg);
static void pdc_sata_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
static int pdc_ata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
static irqreturn_t pdc_interrupt (int irq, void *dev_instance);
static void pdc_eng_timeout(struct ata_port *ap);
static int pdc_port_start(struct ata_port *ap);
static void pdc_port_stop(struct ata_port *ap);
static void pdc_pata_phy_reset(struct ata_port *ap);
static void pdc_qc_prep(struct ata_queued_cmd *qc);
static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf);
static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf);
static int pdc_check_atapi_dma(struct ata_queued_cmd *qc);
static int pdc_old_check_atapi_dma(struct ata_queued_cmd *qc);
static void pdc_irq_clear(struct ata_port *ap);
static unsigned int pdc_qc_issue_prot(struct ata_queued_cmd *qc);
static void pdc_host_stop(struct ata_host *host);
static void pdc_freeze(struct ata_port *ap);
static void pdc_thaw(struct ata_port *ap);
static void pdc_error_handler(struct ata_port *ap);
static void pdc_post_internal_cmd(struct ata_queued_cmd *qc);
static struct scsi_host_template pdc_ata_sht = {
.module = THIS_MODULE,
.name = DRV_NAME,
.ioctl = ata_scsi_ioctl,
.queuecommand = ata_scsi_queuecmd,
.can_queue = ATA_DEF_QUEUE,
.this_id = ATA_SHT_THIS_ID,
.sg_tablesize = LIBATA_MAX_PRD,
.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
.emulated = ATA_SHT_EMULATED,
.use_clustering = ATA_SHT_USE_CLUSTERING,
.proc_name = DRV_NAME,
.dma_boundary = ATA_DMA_BOUNDARY,
.slave_configure = ata_scsi_slave_config,
.slave_destroy = ata_scsi_slave_destroy,
.bios_param = ata_std_bios_param,
};
static const struct ata_port_operations pdc_sata_ops = {
.port_disable = ata_port_disable,
.tf_load = pdc_tf_load_mmio,
.tf_read = ata_tf_read,
.check_status = ata_check_status,
.exec_command = pdc_exec_command_mmio,
.dev_select = ata_std_dev_select,
.check_atapi_dma = pdc_check_atapi_dma,
.qc_prep = pdc_qc_prep,
.qc_issue = pdc_qc_issue_prot,
.freeze = pdc_freeze,
.thaw = pdc_thaw,
.error_handler = pdc_error_handler,
.post_internal_cmd = pdc_post_internal_cmd,
.data_xfer = ata_mmio_data_xfer,
.irq_handler = pdc_interrupt,
.irq_clear = pdc_irq_clear,
.scr_read = pdc_sata_scr_read,
.scr_write = pdc_sata_scr_write,
.port_start = pdc_port_start,
.port_stop = pdc_port_stop,
.host_stop = pdc_host_stop,
};
/* First-generation chips need a more restrictive ->check_atapi_dma op */
static const struct ata_port_operations pdc_old_sata_ops = {
.port_disable = ata_port_disable,
.tf_load = pdc_tf_load_mmio,
.tf_read = ata_tf_read,
.check_status = ata_check_status,
.exec_command = pdc_exec_command_mmio,
.dev_select = ata_std_dev_select,
.check_atapi_dma = pdc_old_check_atapi_dma,
.qc_prep = pdc_qc_prep,
.qc_issue = pdc_qc_issue_prot,
.freeze = pdc_freeze,
.thaw = pdc_thaw,
.error_handler = pdc_error_handler,
.post_internal_cmd = pdc_post_internal_cmd,
.data_xfer = ata_mmio_data_xfer,
.irq_handler = pdc_interrupt,
.irq_clear = pdc_irq_clear,
.scr_read = pdc_sata_scr_read,
.scr_write = pdc_sata_scr_write,
.port_start = pdc_port_start,
.port_stop = pdc_port_stop,
.host_stop = pdc_host_stop,
};
static const struct ata_port_operations pdc_pata_ops = {
.port_disable = ata_port_disable,
.tf_load = pdc_tf_load_mmio,
.tf_read = ata_tf_read,
.check_status = ata_check_status,
.exec_command = pdc_exec_command_mmio,
.dev_select = ata_std_dev_select,
.check_atapi_dma = pdc_check_atapi_dma,
.phy_reset = pdc_pata_phy_reset,
.qc_prep = pdc_qc_prep,
.qc_issue = pdc_qc_issue_prot,
.data_xfer = ata_mmio_data_xfer,
.eng_timeout = pdc_eng_timeout,
.irq_handler = pdc_interrupt,
.irq_clear = pdc_irq_clear,
.port_start = pdc_port_start,
.port_stop = pdc_port_stop,
.host_stop = pdc_host_stop,
};
static const struct ata_port_info pdc_port_info[] = {
/* board_2037x */
{
.sht = &pdc_ata_sht,
.flags = PDC_COMMON_FLAGS,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
.udma_mask = 0x7f, /* udma0-6 ; FIXME */
.port_ops = &pdc_old_sata_ops,
},
/* board_20319 */
{
.sht = &pdc_ata_sht,
.flags = PDC_COMMON_FLAGS | ATA_FLAG_SATA,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
.udma_mask = 0x7f, /* udma0-6 ; FIXME */
.port_ops = &pdc_old_sata_ops,
},
/* board_20619 */
{
.sht = &pdc_ata_sht,
.flags = PDC_COMMON_FLAGS | ATA_FLAG_SRST | ATA_FLAG_SLAVE_POSS,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
.udma_mask = 0x7f, /* udma0-6 ; FIXME */
.port_ops = &pdc_pata_ops,
},
/* board_2057x */
{
.sht = &pdc_ata_sht,
.flags = PDC_COMMON_FLAGS,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
.udma_mask = 0x7f, /* udma0-6 ; FIXME */
.port_ops = &pdc_sata_ops,
},
/* board_40518 */
{
.sht = &pdc_ata_sht,
.flags = PDC_COMMON_FLAGS | ATA_FLAG_SATA,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
.udma_mask = 0x7f, /* udma0-6 ; FIXME */
.port_ops = &pdc_sata_ops,
},
};
static const struct pci_device_id pdc_ata_pci_tbl[] = {
{ PCI_VDEVICE(PROMISE, 0x3371), board_2037x },
{ PCI_VDEVICE(PROMISE, 0x3373), board_2037x },
{ PCI_VDEVICE(PROMISE, 0x3375), board_2037x },
{ PCI_VDEVICE(PROMISE, 0x3376), board_2037x },
{ PCI_VDEVICE(PROMISE, 0x3570), board_2057x },
{ PCI_VDEVICE(PROMISE, 0x3571), board_2057x },
{ PCI_VDEVICE(PROMISE, 0x3574), board_2057x },
{ PCI_VDEVICE(PROMISE, 0x3577), board_2057x },
{ PCI_VDEVICE(PROMISE, 0x3d73), board_2057x },
{ PCI_VDEVICE(PROMISE, 0x3d75), board_2057x },
{ PCI_VDEVICE(PROMISE, 0x3318), board_20319 },
{ PCI_VDEVICE(PROMISE, 0x3319), board_20319 },
{ PCI_VDEVICE(PROMISE, 0x3515), board_20319 },
{ PCI_VDEVICE(PROMISE, 0x3519), board_20319 },
{ PCI_VDEVICE(PROMISE, 0x3d17), board_40518 },
{ PCI_VDEVICE(PROMISE, 0x3d18), board_40518 },
{ PCI_VDEVICE(PROMISE, 0x6629), board_20619 },
{ } /* terminate list */
};
static struct pci_driver pdc_ata_pci_driver = {
.name = DRV_NAME,
.id_table = pdc_ata_pci_tbl,
.probe = pdc_ata_init_one,
.remove = ata_pci_remove_one,
};
static int pdc_port_start(struct ata_port *ap)
{
struct device *dev = ap->host->dev;
struct pdc_host_priv *hp = ap->host->private_data;
struct pdc_port_priv *pp;
int rc;
/* fix up port flags and cable type for SATA+PATA chips */
ap->flags |= hp->port_flags[ap->port_no];
if (ap->flags & ATA_FLAG_SATA)
ap->cbl = ATA_CBL_SATA;
rc = ata_port_start(ap);
if (rc)
return rc;
pp = kzalloc(sizeof(*pp), GFP_KERNEL);
if (!pp) {
rc = -ENOMEM;
goto err_out;
}
pp->pkt = dma_alloc_coherent(dev, 128, &pp->pkt_dma, GFP_KERNEL);
if (!pp->pkt) {
rc = -ENOMEM;
goto err_out_kfree;
}
ap->private_data = pp;
/* fix up PHYMODE4 align timing */
if ((hp->flags & PDC_FLAG_GEN_II) && sata_scr_valid(ap)) {
void __iomem *mmio = (void __iomem *) ap->ioaddr.scr_addr;
unsigned int tmp;
tmp = readl(mmio + 0x014);
tmp = (tmp & ~3) | 1; /* set bits 1:0 = 0:1 */
writel(tmp, mmio + 0x014);
}
return 0;
err_out_kfree:
kfree(pp);
err_out:
ata_port_stop(ap);
return rc;
}
static void pdc_port_stop(struct ata_port *ap)
{
struct device *dev = ap->host->dev;
struct pdc_port_priv *pp = ap->private_data;
ap->private_data = NULL;
dma_free_coherent(dev, 128, pp->pkt, pp->pkt_dma);
kfree(pp);
ata_port_stop(ap);
}
static void pdc_host_stop(struct ata_host *host)
{
struct pdc_host_priv *hp = host->private_data;
ata_pci_host_stop(host);
kfree(hp);
}
static void pdc_reset_port(struct ata_port *ap)
{
void __iomem *mmio = (void __iomem *) ap->ioaddr.cmd_addr + PDC_CTLSTAT;
unsigned int i;
u32 tmp;
for (i = 11; i > 0; i--) {
tmp = readl(mmio);
if (tmp & PDC_RESET)
break;
udelay(100);
tmp |= PDC_RESET;
writel(tmp, mmio);
}
tmp &= ~PDC_RESET;
writel(tmp, mmio);
readl(mmio); /* flush */
}
static void pdc_pata_cbl_detect(struct ata_port *ap)
{
u8 tmp;
void __iomem *mmio = (void __iomem *) ap->ioaddr.cmd_addr + PDC_CTLSTAT + 0x03;
tmp = readb(mmio);
if (tmp & 0x01) {
ap->cbl = ATA_CBL_PATA40;
ap->udma_mask &= ATA_UDMA_MASK_40C;
} else
ap->cbl = ATA_CBL_PATA80;
}
static void pdc_pata_phy_reset(struct ata_port *ap)
{
pdc_pata_cbl_detect(ap);
pdc_reset_port(ap);
ata_port_probe(ap);
ata_bus_reset(ap);
}
static u32 pdc_sata_scr_read (struct ata_port *ap, unsigned int sc_reg)
{
if (sc_reg > SCR_CONTROL || ap->cbl != ATA_CBL_SATA)
return 0xffffffffU;
return readl((void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4));
}
static void pdc_sata_scr_write (struct ata_port *ap, unsigned int sc_reg,
u32 val)
{
if (sc_reg > SCR_CONTROL || ap->cbl != ATA_CBL_SATA)
return;
writel(val, (void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4));
}
static void pdc_atapi_dma_pkt(struct ata_taskfile *tf,
dma_addr_t sg_table,
unsigned int cdb_len, u8 *cdb,
u8 *buf)
{
u32 *buf32 = (u32 *) buf;
/* set control bits (byte 0), zero delay seq id (byte 3),
* and seq id (byte 2)
*/
if (!(tf->flags & ATA_TFLAG_WRITE))
buf32[0] = cpu_to_le32(PDC_PKT_READ);
else
buf32[0] = 0;
buf32[1] = cpu_to_le32(sg_table); /* S/G table addr */
buf32[2] = 0; /* no next-packet */
/* we can represent cdb lengths 2/4/6/8/10/12/14/16 */
BUG_ON(cdb_len & ~0x1E);
buf[12] = (((cdb_len >> 1) & 7) << 5) | ATA_REG_DATA | PDC_LAST_REG;
memcpy(buf+13, cdb, cdb_len);
}
static void pdc_qc_prep(struct ata_queued_cmd *qc)
{
struct pdc_port_priv *pp = qc->ap->private_data;
unsigned int i;
VPRINTK("ENTER\n");
switch (qc->tf.protocol) {
case ATA_PROT_DMA:
ata_qc_prep(qc);
/* fall through */
case ATA_PROT_NODATA:
i = pdc_pkt_header(&qc->tf, qc->ap->prd_dma,
qc->dev->devno, pp->pkt);
if (qc->tf.flags & ATA_TFLAG_LBA48)
i = pdc_prep_lba48(&qc->tf, pp->pkt, i);
else
i = pdc_prep_lba28(&qc->tf, pp->pkt, i);
pdc_pkt_footer(&qc->tf, pp->pkt, i);
break;
case ATA_PROT_ATAPI:
case ATA_PROT_ATAPI_NODATA:
ata_qc_prep(qc);
break;
case ATA_PROT_ATAPI_DMA:
ata_qc_prep(qc);
pdc_atapi_dma_pkt(&qc->tf, qc->ap->prd_dma, qc->dev->cdb_len, qc->cdb, pp->pkt);
break;
default:
break;
}
}
static void pdc_freeze(struct ata_port *ap)
{
void __iomem *mmio = (void __iomem *) ap->ioaddr.cmd_addr;
u32 tmp;
tmp = readl(mmio + PDC_CTLSTAT);
tmp |= PDC_IRQ_DISABLE;
tmp &= ~PDC_DMA_ENABLE;
writel(tmp, mmio + PDC_CTLSTAT);
readl(mmio + PDC_CTLSTAT); /* flush */
}
static void pdc_thaw(struct ata_port *ap)
{
void __iomem *mmio = (void __iomem *) ap->ioaddr.cmd_addr;
u32 tmp;
/* clear IRQ */
readl(mmio + PDC_INT_SEQMASK);
/* turn IRQ back on */
tmp = readl(mmio + PDC_CTLSTAT);
tmp &= ~PDC_IRQ_DISABLE;
writel(tmp, mmio + PDC_CTLSTAT);
readl(mmio + PDC_CTLSTAT); /* flush */
}
static void pdc_error_handler(struct ata_port *ap)
{
ata_reset_fn_t hardreset;
if (!(ap->pflags & ATA_PFLAG_FROZEN))
pdc_reset_port(ap);
hardreset = NULL;
if (sata_scr_valid(ap))
hardreset = sata_std_hardreset;
/* perform recovery */
ata_do_eh(ap, ata_std_prereset, ata_std_softreset, hardreset,
ata_std_postreset);
}
static void pdc_post_internal_cmd(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
if (qc->flags & ATA_QCFLAG_FAILED)
qc->err_mask |= AC_ERR_OTHER;
/* make DMA engine forget about the failed command */
if (qc->err_mask)
pdc_reset_port(ap);
}
static void pdc_eng_timeout(struct ata_port *ap)
{
struct ata_host *host = ap->host;
u8 drv_stat;
struct ata_queued_cmd *qc;
unsigned long flags;
DPRINTK("ENTER\n");
spin_lock_irqsave(&host->lock, flags);
qc = ata_qc_from_tag(ap, ap->active_tag);
switch (qc->tf.protocol) {
case ATA_PROT_DMA:
case ATA_PROT_NODATA:
ata_port_printk(ap, KERN_ERR, "command timeout\n");
drv_stat = ata_wait_idle(ap);
qc->err_mask |= __ac_err_mask(drv_stat);
break;
default:
drv_stat = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
ata_port_printk(ap, KERN_ERR,
"unknown timeout, cmd 0x%x stat 0x%x\n",
qc->tf.command, drv_stat);
qc->err_mask |= ac_err_mask(drv_stat);
break;
}
spin_unlock_irqrestore(&host->lock, flags);
ata_eh_qc_complete(qc);
DPRINTK("EXIT\n");
}
static inline unsigned int pdc_host_intr( struct ata_port *ap,
struct ata_queued_cmd *qc)
{
unsigned int handled = 0;
u32 tmp;
void __iomem *mmio = (void __iomem *) ap->ioaddr.cmd_addr + PDC_GLOBAL_CTL;
tmp = readl(mmio);
if (tmp & PDC_ERR_MASK) {
qc->err_mask |= AC_ERR_DEV;
pdc_reset_port(ap);
}
switch (qc->tf.protocol) {
case ATA_PROT_DMA:
case ATA_PROT_NODATA:
case ATA_PROT_ATAPI_DMA:
qc->err_mask |= ac_err_mask(ata_wait_idle(ap));
ata_qc_complete(qc);
handled = 1;
break;
default:
ap->stats.idle_irq++;
break;
}
return handled;
}
static void pdc_irq_clear(struct ata_port *ap)
{
struct ata_host *host = ap->host;
void __iomem *mmio = host->mmio_base;
readl(mmio + PDC_INT_SEQMASK);
}
static irqreturn_t pdc_interrupt (int irq, void *dev_instance)
{
struct ata_host *host = dev_instance;
struct ata_port *ap;
u32 mask = 0;
unsigned int i, tmp;
unsigned int handled = 0;
void __iomem *mmio_base;
VPRINTK("ENTER\n");
if (!host || !host->mmio_base) {
VPRINTK("QUICK EXIT\n");
return IRQ_NONE;
}
mmio_base = host->mmio_base;
/* reading should also clear interrupts */
mask = readl(mmio_base + PDC_INT_SEQMASK);
if (mask == 0xffffffff) {
VPRINTK("QUICK EXIT 2\n");
return IRQ_NONE;
}
spin_lock(&host->lock);
mask &= 0xffff; /* only 16 tags possible */
if (!mask) {
VPRINTK("QUICK EXIT 3\n");
goto done_irq;
}
writel(mask, mmio_base + PDC_INT_SEQMASK);
for (i = 0; i < host->n_ports; i++) {
VPRINTK("port %u\n", i);
ap = host->ports[i];
tmp = mask & (1 << (i + 1));
if (tmp && ap &&
!(ap->flags & ATA_FLAG_DISABLED)) {
struct ata_queued_cmd *qc;
qc = ata_qc_from_tag(ap, ap->active_tag);
if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)))
handled += pdc_host_intr(ap, qc);
}
}
VPRINTK("EXIT\n");
done_irq:
spin_unlock(&host->lock);
return IRQ_RETVAL(handled);
}
static inline void pdc_packet_start(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
struct pdc_port_priv *pp = ap->private_data;
unsigned int port_no = ap->port_no;
u8 seq = (u8) (port_no + 1);
VPRINTK("ENTER, ap %p\n", ap);
writel(0x00000001, ap->host->mmio_base + (seq * 4));
readl(ap->host->mmio_base + (seq * 4)); /* flush */
pp->pkt[2] = seq;
wmb(); /* flush PRD, pkt writes */
writel(pp->pkt_dma, (void __iomem *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT);
readl((void __iomem *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT); /* flush */
}
static unsigned int pdc_wait_for_drq(struct ata_port *ap)
{
void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
unsigned int i;
unsigned int status;
/* Following pdc-ultra's WaitForDrq() we loop here until BSY
* is clear and DRQ is set in altstatus. We could possibly call
* ata_busy_wait() and loop until DRQ is set, but since we don't
* know how much time a call to ata_busy_wait() took, we don't
* know when to time out the outer loop.
*/
for(i = 0; i < 1000; ++i) {
status = readb(port_mmio + PDC_ALTSTATUS);
if (status == 0xFF)
break;
if (status & ATA_BUSY)
;
else if (status & (ATA_DRQ | ATA_ERR))
break;
mdelay(1);
}
if (i >= 1000)
ata_port_printk(ap, KERN_WARNING, "%s timed out\n", __FUNCTION__);
return status;
}
static unsigned int pdc_wait_on_busy(struct ata_port *ap)
{
unsigned int status = ata_busy_wait(ap, ATA_BUSY, 1000);
if (status != 0xff && (status & ATA_BUSY))
ata_port_printk(ap, KERN_WARNING, "%s timed out\n", __FUNCTION__);
return status;
}
static void pdc_issue_atapi_pkt_cmd(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
void __iomem *host_mmio = ap->host->mmio_base;
unsigned int nbytes;
unsigned int tmp;
writeb(0x00, port_mmio + PDC_CTLSTAT); /* route drive INT to SEQ 0 */
writeb(PDC_SEQCNTRL_INT_MASK, host_mmio + 0); /* but mask SEQ 0 INT */
/* select drive */
if (sata_scr_valid(ap)) {
tmp = PDC_DEVICE_SATA;
} else {
tmp = ATA_DEVICE_OBS;
if (qc->dev->devno != 0)
tmp |= ATA_DEV1;
}
writeb(tmp, port_mmio + PDC_DEVICE);
pdc_wait_on_busy(ap);
writeb(0x00, port_mmio + PDC_SECTOR_COUNT);
writeb(0x00, port_mmio + PDC_SECTOR_NUMBER);
/* set feature and byte counter registers */
if (qc->tf.protocol != ATA_PROT_ATAPI_DMA) {
tmp = PDC_FEATURE_ATAPI_PIO;
/* set byte counter register to real transfer byte count */
nbytes = qc->nbytes;
if (!nbytes)
nbytes = qc->nsect << 9;
if (nbytes > 0xffff)
nbytes = 0xffff;
} else {
tmp = PDC_FEATURE_ATAPI_DMA;
/* set byte counter register to 0 */
nbytes = 0;
}
writeb(tmp, port_mmio + PDC_FEATURE);
writeb(nbytes & 0xFF, port_mmio + PDC_CYLINDER_LOW);
writeb((nbytes >> 8) & 0xFF, port_mmio + PDC_CYLINDER_HIGH);
/* send ATAPI packet command 0xA0 */
writeb(ATA_CMD_PACKET, port_mmio + PDC_COMMAND);
/* pdc_qc_issue_prot() currently sends ATAPI PIO packets back
* to libata. If we start handling those packets ourselves,
* then we must busy-wait for INT (CTLSTAT bit 27) at this point
* if the device has ATA_DFLAG_CDB_INTR set.
*/
pdc_wait_for_drq(ap);
/* now the device only waits for the CDB */
}
static unsigned int pdc_qc_issue_prot(struct ata_queued_cmd *qc)
{
switch (qc->tf.protocol) {
case ATA_PROT_ATAPI_DMA:
pdc_issue_atapi_pkt_cmd(qc);
/*FALLTHROUGH*/
case ATA_PROT_DMA:
case ATA_PROT_NODATA:
pdc_packet_start(qc);
return 0;
default:
break;
}
return ata_qc_issue_prot(qc);
}
static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
{
WARN_ON (tf->protocol == ATA_PROT_DMA ||
tf->protocol == ATA_PROT_NODATA);
ata_tf_load(ap, tf);
}
static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
{
WARN_ON (tf->protocol == ATA_PROT_DMA ||
tf->protocol == ATA_PROT_NODATA);
ata_exec_command(ap, tf);
}
static int pdc_check_atapi_dma(struct ata_queued_cmd *qc)
{
u8 *scsicmd = qc->scsicmd->cmnd;
int pio = 1; /* atapi dma off by default */
/* Whitelist commands that may use DMA. */
switch (scsicmd[0]) {
case WRITE_12:
case WRITE_10:
case WRITE_6:
case READ_12:
case READ_10:
case READ_6:
case 0xad: /* READ_DVD_STRUCTURE */
case 0xbe: /* READ_CD */
pio = 0;
}
/* -45150 (FFFF4FA2) to -1 (FFFFFFFF) shall use PIO mode */
if (scsicmd[0] == WRITE_10) {
unsigned int lba;
lba = (scsicmd[2] << 24) | (scsicmd[3] << 16) | (scsicmd[4] << 8) | scsicmd[5];
if (lba >= 0xFFFF4FA2)
pio = 1;
}
return pio;
}
static int pdc_old_check_atapi_dma(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
/* First generation chips cannot use ATAPI DMA on SATA ports */
if (sata_scr_valid(ap))
return 1;
return pdc_check_atapi_dma(qc);
}
static void pdc_ata_setup_port(struct ata_ioports *port, unsigned long base)
{
port->cmd_addr = base;
port->data_addr = base;
port->feature_addr =
port->error_addr = base + 0x4;
port->nsect_addr = base + 0x8;
port->lbal_addr = base + 0xc;
port->lbam_addr = base + 0x10;
port->lbah_addr = base + 0x14;
port->device_addr = base + 0x18;
port->command_addr =
port->status_addr = base + 0x1c;
port->altstatus_addr =
port->ctl_addr = base + 0x38;
}
static void pdc_host_init(unsigned int chip_id, struct ata_probe_ent *pe)
{
void __iomem *mmio = pe->mmio_base;
struct pdc_host_priv *hp = pe->private_data;
int hotplug_offset;
u32 tmp;
if (hp->flags & PDC_FLAG_GEN_II)
hotplug_offset = PDC2_SATA_PLUG_CSR;
else
hotplug_offset = PDC_SATA_PLUG_CSR;
/*
* Except for the hotplug stuff, this is voodoo from the
* Promise driver. Label this entire section
* "TODO: figure out why we do this"
*/
/* enable BMR_BURST, maybe change FIFO_SHD to 8 dwords */
tmp = readl(mmio + PDC_FLASH_CTL);
tmp |= 0x02000; /* bit 13 (enable bmr burst) */
if (!(hp->flags & PDC_FLAG_GEN_II))
tmp |= 0x10000; /* bit 16 (fifo threshold at 8 dw) */
writel(tmp, mmio + PDC_FLASH_CTL);
/* clear plug/unplug flags for all ports */
tmp = readl(mmio + hotplug_offset);
writel(tmp | 0xff, mmio + hotplug_offset);
/* mask plug/unplug ints */
tmp = readl(mmio + hotplug_offset);
writel(tmp | 0xff0000, mmio + hotplug_offset);
/* don't initialise TBG or SLEW on 2nd generation chips */
if (hp->flags & PDC_FLAG_GEN_II)
return;
/* reduce TBG clock to 133 Mhz. */
tmp = readl(mmio + PDC_TBG_MODE);
tmp &= ~0x30000; /* clear bit 17, 16*/
tmp |= 0x10000; /* set bit 17:16 = 0:1 */
writel(tmp, mmio + PDC_TBG_MODE);
readl(mmio + PDC_TBG_MODE); /* flush */
msleep(10);
/* adjust slew rate control register. */
tmp = readl(mmio + PDC_SLEW_CTL);
tmp &= 0xFFFFF03F; /* clear bit 11 ~ 6 */
tmp |= 0x00000900; /* set bit 11-9 = 100b , bit 8-6 = 100 */
writel(tmp, mmio + PDC_SLEW_CTL);
}
static int pdc_ata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
{
static int printed_version;
struct ata_probe_ent *probe_ent = NULL;
struct pdc_host_priv *hp;
unsigned long base;
void __iomem *mmio_base;
unsigned int board_idx = (unsigned int) ent->driver_data;
int pci_dev_busy = 0;
int rc;
u8 tmp;
if (!printed_version++)
dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
rc = pci_enable_device(pdev);
if (rc)
return rc;
rc = pci_request_regions(pdev, DRV_NAME);
if (rc) {
pci_dev_busy = 1;
goto err_out;
}
rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
if (rc)
goto err_out_regions;
rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
if (rc)
goto err_out_regions;
probe_ent = kzalloc(sizeof(*probe_ent), GFP_KERNEL);
if (probe_ent == NULL) {
rc = -ENOMEM;
goto err_out_regions;
}
probe_ent->dev = pci_dev_to_dev(pdev);
INIT_LIST_HEAD(&probe_ent->node);
mmio_base = pci_iomap(pdev, 3, 0);
if (mmio_base == NULL) {
rc = -ENOMEM;
goto err_out_free_ent;
}
base = (unsigned long) mmio_base;
hp = kzalloc(sizeof(*hp), GFP_KERNEL);
if (hp == NULL) {
rc = -ENOMEM;
goto err_out_free_ent;
}
probe_ent->private_data = hp;
probe_ent->sht = pdc_port_info[board_idx].sht;
probe_ent->port_flags = pdc_port_info[board_idx].flags;
probe_ent->pio_mask = pdc_port_info[board_idx].pio_mask;
probe_ent->mwdma_mask = pdc_port_info[board_idx].mwdma_mask;
probe_ent->udma_mask = pdc_port_info[board_idx].udma_mask;
probe_ent->port_ops = pdc_port_info[board_idx].port_ops;
probe_ent->irq = pdev->irq;
probe_ent->irq_flags = IRQF_SHARED;
probe_ent->mmio_base = mmio_base;
pdc_ata_setup_port(&probe_ent->port[0], base + 0x200);
pdc_ata_setup_port(&probe_ent->port[1], base + 0x280);
probe_ent->port[0].scr_addr = base + 0x400;
probe_ent->port[1].scr_addr = base + 0x500;
/* notice 4-port boards */
switch (board_idx) {
case board_40518:
hp->flags |= PDC_FLAG_GEN_II;
/* Fall through */
case board_20319:
probe_ent->n_ports = 4;
pdc_ata_setup_port(&probe_ent->port[2], base + 0x300);
pdc_ata_setup_port(&probe_ent->port[3], base + 0x380);
probe_ent->port[2].scr_addr = base + 0x600;
probe_ent->port[3].scr_addr = base + 0x700;
break;
case board_2057x:
hp->flags |= PDC_FLAG_GEN_II;
/* Fall through */
case board_2037x:
/* TX2plus boards also have a PATA port */
tmp = readb(mmio_base + PDC_FLASH_CTL+1);
if (!(tmp & 0x80)) {
probe_ent->n_ports = 3;
pdc_ata_setup_port(&probe_ent->port[2], base + 0x300);
hp->port_flags[2] = ATA_FLAG_SLAVE_POSS;
printk(KERN_INFO DRV_NAME " PATA port found\n");
} else
probe_ent->n_ports = 2;
hp->port_flags[0] = ATA_FLAG_SATA;
hp->port_flags[1] = ATA_FLAG_SATA;
break;
case board_20619:
probe_ent->n_ports = 4;
pdc_ata_setup_port(&probe_ent->port[2], base + 0x300);
pdc_ata_setup_port(&probe_ent->port[3], base + 0x380);
probe_ent->port[2].scr_addr = base + 0x600;
probe_ent->port[3].scr_addr = base + 0x700;
break;
default:
BUG();
break;
}
pci_set_master(pdev);
/* initialize adapter */
pdc_host_init(board_idx, probe_ent);
/* FIXME: Need any other frees than hp? */
if (!ata_device_add(probe_ent))
kfree(hp);
kfree(probe_ent);
return 0;
err_out_free_ent:
kfree(probe_ent);
err_out_regions:
pci_release_regions(pdev);
err_out:
if (!pci_dev_busy)
pci_disable_device(pdev);
return rc;
}
static int __init pdc_ata_init(void)
{
return pci_register_driver(&pdc_ata_pci_driver);
}
static void __exit pdc_ata_exit(void)
{
pci_unregister_driver(&pdc_ata_pci_driver);
}
MODULE_AUTHOR("Jeff Garzik");
MODULE_DESCRIPTION("Promise ATA TX2/TX4/TX4000 low-level driver");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, pdc_ata_pci_tbl);
MODULE_VERSION(DRV_VERSION);
module_init(pdc_ata_init);
module_exit(pdc_ata_exit);
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