From: Sergei Shtylyov <sshtylyov@ru.mvista.com>
To: bzolnier@gmail.com
Cc: linux-ide@vger.kernel.org, stf_xl@wp.pl
Subject: [PATCH 2/2] ide: add support for CFA specified transfer modes (take 2)
Date: Sat, 7 Mar 2009 21:09:47 +0400 [thread overview]
Message-ID: <200903072009.47157.sshtylyov@ru.mvista.com> (raw)
Add support for the CompactFlash specific PIO modes 5/6 and MWDMA modes 3/4.
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
---
Did two changes after Bart's review:
- fixed wrong mask in ide_config_drive_speed();
- clarified comment in ide_pio_cycle_time().
This patch is against the current pata-2.6 series. Since there were no PIO5
capable hard drives produced and you also need 66 MHz input clock to actually
get the difference WRT the setup timing programmed, I decided to simply replace
the old non-standard PIO mode 5 timings with CFA specified ones.
Phew, hopefully I haven't overlooked anything -- quite a lot had to be changed.
Stanislaw, please give it a try -- I don't have any CF hardware now.
drivers/ide/ide-dma.c | 8 ++++++++
drivers/ide/ide-iops.c | 8 ++++++++
drivers/ide/ide-timings.c | 12 ++++++++++--
drivers/ide/ide-xfer-mode.c | 15 +++++++++------
4 files changed, 35 insertions(+), 8 deletions(-)
Index: linux-2.6/drivers/ide/ide-dma.c
===================================================================
--- linux-2.6.orig/drivers/ide/ide-dma.c
+++ linux-2.6/drivers/ide/ide-dma.c
@@ -261,6 +261,14 @@ static unsigned int ide_get_mode_mask(id
break;
case XFER_MW_DMA_0:
mask = id[ATA_ID_MWDMA_MODES];
+
+ /* Also look for the CF specific MWDMA modes... */
+ if (ata_id_is_cfa(id) && (id[ATA_ID_CFA_MODES] & 0x38)) {
+ u8 mode = ((id[ATA_ID_CFA_MODES] & 0x38) >> 3) - 1;
+
+ mask |= ((2 << mode) - 1) << 3;
+ }
+
if (port_ops && port_ops->mdma_filter)
mask &= port_ops->mdma_filter(drive);
else
Index: linux-2.6/drivers/ide/ide-iops.c
===================================================================
--- linux-2.6.orig/drivers/ide/ide-iops.c
+++ linux-2.6/drivers/ide/ide-iops.c
@@ -389,6 +389,8 @@ int ide_config_drive_speed(ide_drive_t *
id[ATA_ID_UDMA_MODES] &= ~0xFF00;
id[ATA_ID_MWDMA_MODES] &= ~0x0F00;
id[ATA_ID_SWDMA_MODES] &= ~0x0F00;
+ if (ata_id_is_cfa(id))
+ id[ATA_ID_CFA_MODES] &= ~0x0FC0;
skip:
#ifdef CONFIG_BLK_DEV_IDEDMA
@@ -401,12 +403,18 @@ int ide_config_drive_speed(ide_drive_t *
if (speed >= XFER_UDMA_0) {
i = 1 << (speed - XFER_UDMA_0);
id[ATA_ID_UDMA_MODES] |= (i << 8 | i);
+ } else if (ata_id_is_cfa(id) && speed >= XFER_MW_DMA_3) {
+ i = speed - XFER_MW_DMA_2;
+ id[ATA_ID_CFA_MODES] |= i << 9;
} else if (speed >= XFER_MW_DMA_0) {
i = 1 << (speed - XFER_MW_DMA_0);
id[ATA_ID_MWDMA_MODES] |= (i << 8 | i);
} else if (speed >= XFER_SW_DMA_0) {
i = 1 << (speed - XFER_SW_DMA_0);
id[ATA_ID_SWDMA_MODES] |= (i << 8 | i);
+ } else if (ata_id_is_cfa(id) && speed >= XFER_PIO_5) {
+ i = speed - XFER_PIO_4;
+ id[ATA_ID_CFA_MODES] |= i << 6;
}
if (!drive->init_speed)
Index: linux-2.6/drivers/ide/ide-timings.c
===================================================================
--- linux-2.6.orig/drivers/ide/ide-timings.c
+++ linux-2.6/drivers/ide/ide-timings.c
@@ -43,6 +43,8 @@ static struct ide_timing ide_timing[] =
{ XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 },
{ XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 },
+ { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 },
+ { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 },
{ XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 },
{ XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 },
{ XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 },
@@ -51,7 +53,8 @@ static struct ide_timing ide_timing[] =
{ XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 },
{ XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 },
- { XFER_PIO_5, 20, 50, 30, 100, 50, 30, 100, 0 },
+ { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 },
+ { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 },
{ XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 },
{ XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 },
@@ -90,6 +93,10 @@ u16 ide_pio_cycle_time(ide_drive_t *driv
/* conservative "downgrade" for all pre-ATA2 drives */
if (pio < 3 && cycle < t->cycle)
cycle = 0; /* use standard timing */
+
+ /* Use the standard timing for the CF specific modes too */
+ if (pio > 4 && ata_id_is_cfa(id))
+ cycle = 0;
}
return cycle ? cycle : t->cycle;
@@ -161,7 +168,8 @@ int ide_timing_compute(ide_drive_t *driv
if (speed <= XFER_PIO_2)
p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO];
- else if (speed <= XFER_PIO_5)
+ else if ((speed <= XFER_PIO_4) ||
+ (speed == XFER_PIO_5 && !ata_id_is_cfa(id)))
p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO_IORDY];
else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2)
p.cycle = id[ATA_ID_EIDE_DMA_MIN];
Index: linux-2.6/drivers/ide/ide-xfer-mode.c
===================================================================
--- linux-2.6.orig/drivers/ide/ide-xfer-mode.c
+++ linux-2.6/drivers/ide/ide-xfer-mode.c
@@ -9,11 +9,11 @@ static const char *udma_str[] =
{ "UDMA/16", "UDMA/25", "UDMA/33", "UDMA/44",
"UDMA/66", "UDMA/100", "UDMA/133", "UDMA7" };
static const char *mwdma_str[] =
- { "MWDMA0", "MWDMA1", "MWDMA2" };
+ { "MWDMA0", "MWDMA1", "MWDMA2", "MWDMA3", "MWDMA4" };
static const char *swdma_str[] =
{ "SWDMA0", "SWDMA1", "SWDMA2" };
static const char *pio_str[] =
- { "PIO0", "PIO1", "PIO2", "PIO3", "PIO4", "PIO5" };
+ { "PIO0", "PIO1", "PIO2", "PIO3", "PIO4", "PIO5", "PIO6" };
/**
* ide_xfer_verbose - return IDE mode names
@@ -30,11 +30,11 @@ const char *ide_xfer_verbose(u8 mode)
if (mode >= XFER_UDMA_0 && mode <= XFER_UDMA_7)
s = udma_str[i];
- else if (mode >= XFER_MW_DMA_0 && mode <= XFER_MW_DMA_2)
+ else if (mode >= XFER_MW_DMA_0 && mode <= XFER_MW_DMA_4)
s = mwdma_str[i];
else if (mode >= XFER_SW_DMA_0 && mode <= XFER_SW_DMA_2)
s = swdma_str[i];
- else if (mode >= XFER_PIO_0 && mode <= XFER_PIO_5)
+ else if (mode >= XFER_PIO_0 && mode <= XFER_PIO_6)
s = pio_str[i & 0x7];
else if (mode == XFER_PIO_SLOW)
s = "PIO SLOW";
@@ -79,7 +79,10 @@ u8 ide_get_best_pio_mode(ide_drive_t *dr
}
if (id[ATA_ID_FIELD_VALID] & 2) { /* ATA2? */
- if (ata_id_has_iordy(id)) {
+ if (ata_id_is_cfa(id) && (id[ATA_ID_CFA_MODES] & 7))
+ pio_mode = 4 + min_t(int, 2,
+ id[ATA_ID_CFA_MODES] & 7);
+ else if (ata_id_has_iordy(id)) {
if (id[ATA_ID_PIO_MODES] & 7) {
overridden = 0;
if (id[ATA_ID_PIO_MODES] & 4)
@@ -239,7 +242,7 @@ int ide_set_xfer_rate(ide_drive_t *drive
BUG_ON(rate < XFER_PIO_0);
- if (rate >= XFER_PIO_0 && rate <= XFER_PIO_5)
+ if (rate >= XFER_PIO_0 && rate <= XFER_PIO_6)
return ide_set_pio_mode(drive, rate);
return ide_set_dma_mode(drive, rate);
next reply other threads:[~2009-03-07 17:09 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-07 17:09 Sergei Shtylyov [this message]
2009-03-07 21:12 ` [PATCH 2/2] ide: add support for CFA specified transfer modes (take 2) Sergei Shtylyov
2009-03-08 16:43 ` Bartlomiej Zolnierkiewicz
2009-03-08 21:05 ` Sergei Shtylyov
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