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sata_promise: separate SATA and PATA ops 

This patch changes sata_promise so that the PATA ports
on TX2plus chips are bound to the pdc_pata_ops structure.
This means that operations called from the SATA ops
structures don't need any SATA-vs-PATA tests any more.
Instead, operations that depend on a port being SATA or
PATA are separated into different procedures.

* pdc_cable_type() is split into a PATA version and a
  SATA version
* pdc_error_handler() is split into a PATA version and a
  SATA version, that both call a common version after
  setting up the `hardreset' function pointer
* pdc_old_check_atapi_dma() is now only used for SATAI
  ports, so is renamed to pdc_old_sata_check_atapi_dma()
  and simplified
* pdc_sata_scr_{read,write}() are now only used for SATA
  ports, so their is-not-SATA tests are removed
* pdc_port_start() is split into three procedures: a wrapper
  which performs the ->ops adjustment on TX2plus PATA ports,
  a procedure with the common code, and a procedure with
  the SATA-specific code (this bit might be cleaned up by
  Tejun's new init model)

Tested on 20619, 20575, and 20775 chips.

Signed-off-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Mikael Pettersson 2007-03-11 21:20:43 +01:00 committed by Jeff Garzik
parent 799331fda0
commit 724114a573
1 changed files with 66 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

107
drivers/ata/sata_promise.c
View File

@ -45,7 +45,7 @@
#include "sata_promise.h"
#define DRV_NAME "sata_promise"
#define DRV_VERSION "2.02"
#define DRV_VERSION "2.03"
enum {
@ -124,14 +124,16 @@ 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 int pdc_old_sata_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_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_pata_error_handler(struct ata_port *ap);
static void pdc_sata_error_handler(struct ata_port *ap);
static void pdc_post_internal_cmd(struct ata_queued_cmd *qc);
static int pdc_cable_detect(struct ata_port *ap);
static int pdc_pata_cable_detect(struct ata_port *ap);
static int pdc_sata_cable_detect(struct ata_port *ap);
static struct scsi_host_template pdc_ata_sht = {
.module = THIS_MODULE,
@ -164,9 +166,9 @@ static const struct ata_port_operations pdc_sata_ops = {
.qc_issue = pdc_qc_issue_prot,
.freeze = pdc_freeze,
.thaw = pdc_thaw,
.error_handler = pdc_error_handler,
.error_handler = pdc_sata_error_handler,
.post_internal_cmd = pdc_post_internal_cmd,
.cable_detect = pdc_cable_detect,
.cable_detect = pdc_sata_cable_detect,
.data_xfer = ata_data_xfer,
.irq_handler = pdc_interrupt,
.irq_clear = pdc_irq_clear,
@ -186,15 +188,15 @@ static const struct ata_port_operations pdc_old_sata_ops = {
.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,
.check_atapi_dma = pdc_old_sata_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,
.error_handler = pdc_sata_error_handler,
.post_internal_cmd = pdc_post_internal_cmd,
.cable_detect = pdc_cable_detect,
.cable_detect = pdc_sata_cable_detect,
.data_xfer = ata_data_xfer,
.irq_handler = pdc_interrupt,
.irq_clear = pdc_irq_clear,
@ -219,9 +221,9 @@ static const struct ata_port_operations pdc_pata_ops = {
.qc_issue = pdc_qc_issue_prot,
.freeze = pdc_freeze,
.thaw = pdc_thaw,
.error_handler = pdc_error_handler,
.error_handler = pdc_pata_error_handler,
.post_internal_cmd = pdc_post_internal_cmd,
.cable_detect = pdc_cable_detect,
.cable_detect = pdc_pata_cable_detect,
.data_xfer = ata_data_xfer,
.irq_handler = pdc_interrupt,
.irq_clear = pdc_irq_clear,
@ -316,18 +318,12 @@ static struct pci_driver pdc_ata_pci_driver = {
};
static int pdc_port_start(struct ata_port *ap)
static int pdc_common_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;
@ -342,8 +338,20 @@ static int pdc_port_start(struct ata_port *ap)
ap->private_data = pp;
return 0;
}
static int pdc_sata_port_start(struct ata_port *ap)
{
struct pdc_host_priv *hp = ap->host->private_data;
int rc;
rc = pdc_common_port_start(ap);
if (rc)
return rc;
/* fix up PHYMODE4 align timing */
if ((hp->flags & PDC_FLAG_GEN_II) && sata_scr_valid(ap)) {
if (hp->flags & PDC_FLAG_GEN_II) {
void __iomem *mmio = (void __iomem *) ap->ioaddr.scr_addr;
unsigned int tmp;
@ -355,6 +363,21 @@ static int pdc_port_start(struct ata_port *ap)
return 0;
}
static int pdc_port_start(struct ata_port *ap)
{
struct pdc_host_priv *hp = ap->host->private_data;
/* 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;
return pdc_sata_port_start(ap);
} else {
ap->ops = &pdc_pata_ops;
return pdc_common_port_start(ap);
}
}
static void pdc_reset_port(struct ata_port *ap)
{
void __iomem *mmio = ap->ioaddr.cmd_addr + PDC_CTLSTAT;
@ -377,23 +400,25 @@ static void pdc_reset_port(struct ata_port *ap)
readl(mmio); /* flush */
}
static int pdc_cable_detect(struct ata_port *ap)
static int pdc_pata_cable_detect(struct ata_port *ap)
{
u8 tmp;
void __iomem *mmio = (void __iomem *) ap->ioaddr.cmd_addr + PDC_CTLSTAT + 0x03;
if (!sata_scr_valid(ap)) {
tmp = readb(mmio);
if (tmp & 0x01)
return ATA_CBL_PATA40;
return ATA_CBL_PATA80;
}
tmp = readb(mmio);
if (tmp & 0x01)
return ATA_CBL_PATA40;
return ATA_CBL_PATA80;
}
static int pdc_sata_cable_detect(struct ata_port *ap)
{
return ATA_CBL_SATA;
}
static u32 pdc_sata_scr_read (struct ata_port *ap, unsigned int sc_reg)
{
if (sc_reg > SCR_CONTROL || ap->cbl != ATA_CBL_SATA)
if (sc_reg > SCR_CONTROL)
return 0xffffffffU;
return readl(ap->ioaddr.scr_addr + (sc_reg * 4));
}
@ -402,7 +427,7 @@ 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)
{
if (sc_reg > SCR_CONTROL || ap->cbl != ATA_CBL_SATA)
if (sc_reg > SCR_CONTROL)
return;
writel(val, ap->ioaddr.scr_addr + (sc_reg * 4));
}
@ -558,22 +583,26 @@ static void pdc_thaw(struct ata_port *ap)
readl(mmio + PDC_CTLSTAT); /* flush */
}
static void pdc_error_handler(struct ata_port *ap)
static void pdc_common_error_handler(struct ata_port *ap, ata_reset_fn_t hardreset)
{
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_pata_error_handler(struct ata_port *ap)
{
pdc_common_error_handler(ap, NULL);
}
static void pdc_sata_error_handler(struct ata_port *ap)
{
pdc_common_error_handler(ap, sata_std_hardreset);
}
static void pdc_post_internal_cmd(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
@ -763,14 +792,10 @@ static int pdc_check_atapi_dma(struct ata_queued_cmd *qc)
return pio;
}
static int pdc_old_check_atapi_dma(struct ata_queued_cmd *qc)
static int pdc_old_sata_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);
return 1;
}
static void pdc_ata_setup_port(struct ata_ioports *port, void __iomem *base,