ide-pmac: remove pmac_ide_do_setfeature() (take 2)

Use ide_config_drive_speed() instead of pmac_ide_do_setfeature() and remove
the latter, also  ide-iops.c::__ide_wait_stat() could be static again.

Since for IDE PMAC host driver IDE_CONTROL_REG is always true, device's
->quirk_list is always zero and ->ide_dma_host_{on,off} are nops than
the only changes in behavior are:

* if PIO mode is set then ->dma_off_queitly is called to disable DMA

* if setting transfer mode fails ide_dump_status() is called to dump status

v2:
* IDE PMAC controllers allow separate PIO and DMA timings and PPC userland
  depends on this fact, and calls "hdparm -p" without calling "hdparm -d".

  Therefore to compensate for DMA being disabled by ide_config_drive_speed()
  for PIO modes:

  - add IDE_HFLAG_SET_PIO_MODE_KEEP_DMA flag and set it in PMAC host driver

  - add handling of the new flag to ide-io.c::do_special()

Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
parent 3b2d0093
......@@ -836,9 +836,17 @@ static ide_startstop_t do_special (ide_drive_t *drive)
if (set_pio_mode_abuse(drive->hwif, req_pio)) {
if (hwif->set_pio_mode)
hwif->set_pio_mode(drive, req_pio);
} else
} else {
int keep_dma = drive->using_dma;
ide_set_pio(drive, req_pio);
if (hwif->host_flags & IDE_HFLAG_SET_PIO_MODE_KEEP_DMA) {
if (keep_dma)
hwif->ide_dma_on(drive);
}
}
return ide_stopped;
} else {
if (drive->media == ide_disk)
......
......@@ -483,7 +483,7 @@ EXPORT_SYMBOL(drive_is_ready);
* setting a timer to wake up at half second intervals thereafter,
* until timeout is achieved, before timing out.
*/
int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout, u8 *rstat)
static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout, u8 *rstat)
{
ide_hwif_t *hwif = drive->hwif;
unsigned long flags;
......
......@@ -529,81 +529,6 @@ pmac_outbsync(ide_drive_t *drive, u8 value, unsigned long port)
tmp = readl(PMAC_IDE_REG(IDE_TIMING_CONFIG));
}
/*
* Send the SET_FEATURE IDE command to the drive and update drive->id with
* the new state. We currently don't use the generic routine as it used to
* cause various trouble, especially with older mediabays.
* This code is sometimes triggering a spurrious interrupt though, I need
* to sort that out sooner or later and see if I can finally get the
* common version to work properly in all cases
*/
static int
pmac_ide_do_setfeature(ide_drive_t *drive, u8 command)
{
ide_hwif_t *hwif = HWIF(drive);
int result;
u8 stat;
disable_irq_nosync(hwif->irq);
udelay(1);
SELECT_DRIVE(drive);
SELECT_MASK(drive, 0);
udelay(1);
hwif->OUTB(drive->ctl | 2, IDE_CONTROL_REG);
hwif->OUTB(command, IDE_NSECTOR_REG);
hwif->OUTB(SETFEATURES_XFER, IDE_FEATURE_REG);
hwif->OUTBSYNC(drive, WIN_SETFEATURES, IDE_COMMAND_REG);
result = __ide_wait_stat(drive, drive->ready_stat,
BUSY_STAT|DRQ_STAT|ERR_STAT,
WAIT_CMD, &stat);
if (result)
printk(KERN_ERR "%s: pmac_ide_do_setfeature disk not ready "
"after SET_FEATURE !\n", drive->name);
SELECT_MASK(drive, 0);
if (result == 0) {
drive->id->dma_ultra &= ~0xFF00;
drive->id->dma_mword &= ~0x0F00;
drive->id->dma_1word &= ~0x0F00;
switch(command) {
case XFER_UDMA_7:
drive->id->dma_ultra |= 0x8080; break;
case XFER_UDMA_6:
drive->id->dma_ultra |= 0x4040; break;
case XFER_UDMA_5:
drive->id->dma_ultra |= 0x2020; break;
case XFER_UDMA_4:
drive->id->dma_ultra |= 0x1010; break;
case XFER_UDMA_3:
drive->id->dma_ultra |= 0x0808; break;
case XFER_UDMA_2:
drive->id->dma_ultra |= 0x0404; break;
case XFER_UDMA_1:
drive->id->dma_ultra |= 0x0202; break;
case XFER_UDMA_0:
drive->id->dma_ultra |= 0x0101; break;
case XFER_MW_DMA_2:
drive->id->dma_mword |= 0x0404; break;
case XFER_MW_DMA_1:
drive->id->dma_mword |= 0x0202; break;
case XFER_MW_DMA_0:
drive->id->dma_mword |= 0x0101; break;
case XFER_SW_DMA_2:
drive->id->dma_1word |= 0x0404; break;
case XFER_SW_DMA_1:
drive->id->dma_1word |= 0x0202; break;
case XFER_SW_DMA_0:
drive->id->dma_1word |= 0x0101; break;
default: break;
}
if (!drive->init_speed)
drive->init_speed = command;
drive->current_speed = command;
}
enable_irq(hwif->irq);
return result;
}
/*
* Old tuning functions (called on hdparm -p), sets up drive PIO timings
*/
......@@ -685,7 +610,7 @@ pmac_ide_set_pio_mode(ide_drive_t *drive, const u8 pio)
drive->name, pio, *timings);
#endif
if (pmac_ide_do_setfeature(drive, XFER_PIO_0 + pio))
if (ide_config_drive_speed(drive, XFER_PIO_0 + pio))
return;
pmac_ide_do_update_timings(drive);
......@@ -948,7 +873,7 @@ static int pmac_ide_tune_chipset(ide_drive_t *drive, const u8 speed)
if (ret)
return ret;
ret = pmac_ide_do_setfeature(drive, speed);
ret = ide_config_drive_speed(drive, speed);
if (ret)
return ret;
......@@ -1218,6 +1143,7 @@ pmac_ide_setup_device(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif)
hwif->cbl = pmif->cable_80 ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
hwif->drives[0].unmask = 1;
hwif->drives[1].unmask = 1;
hwif->host_flags = IDE_HFLAG_SET_PIO_MODE_KEEP_DMA;
hwif->pio_mask = ATA_PIO4;
hwif->set_pio_mode = pmac_ide_set_pio_mode;
if (pmif->kind == controller_un_ata6
......
......@@ -1153,7 +1153,6 @@ extern void SELECT_MASK(ide_drive_t *, int);
extern void QUIRK_LIST(ide_drive_t *);
extern int drive_is_ready(ide_drive_t *);
int __ide_wait_stat(ide_drive_t *, u8, u8, unsigned long);
/*
* taskfile io for disks for now...and builds request from ide_ioctl
......@@ -1253,6 +1252,11 @@ enum {
IDE_HFLAG_ABUSE_FAST_DEVSEL = (1 << 5),
/* use 100-102 and 200-202 PIO values to set DMA modes */
IDE_HFLAG_ABUSE_DMA_MODES = (1 << 6),
/*
* keep DMA setting when programming PIO mode, may be used only
* for hosts which have separate PIO and DMA timings (ie. PMAC)
*/
IDE_HFLAG_SET_PIO_MODE_KEEP_DMA = (1 << 7),
};
typedef struct ide_pci_device_s {
......
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