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[PATCH 1/2] libata: Add another column to the ata_timing table.

To: linux-ide@vger.kernel.org
Subject: [PATCH 1/2] libata: Add another column to the ata_timing table.
From: David Daney <ddaney@caviumnetworks.com>
Date: Thu, 15 Jan 2009 12:57:32 -0800
Cc: linux-mips@linux-mips.org, David Daney <ddaney@caviumnetworks.com>
In-reply-to: <496FA2E9.9030403@caviumnetworks.com>
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <496FA2E9.9030403@caviumnetworks.com>
Sender: linux-mips-bounce@linux-mips.org
The forthcoming OCTEON SOC Compact Flash driver needs an additional
timing value that was not available in the ata_timing table.  I add a
new column for dmack_hold time.  The values were obtained from the
Compact Flash specification Rev 4.1.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
---
 drivers/ata/libata-core.c |   72 +++++++++++++++++++++++----------------------
 include/linux/libata.h    |    9 ++++--
 2 files changed, 43 insertions(+), 38 deletions(-)

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 71218d7..8fe0012 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3029,33 +3029,33 @@ int sata_set_spd(struct ata_link *link)
  */
 
 static const struct ata_timing ata_timing[] = {
-/*     { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960,   0 }, */
-       { XFER_PIO_0,     70, 290, 240, 600, 165, 150, 600,   0 },
-       { XFER_PIO_1,     50, 290,  93, 383, 125, 100, 383,   0 },
-       { XFER_PIO_2,     30, 290,  40, 330, 100,  90, 240,   0 },
-       { XFER_PIO_3,     30,  80,  70, 180,  80,  70, 180,   0 },
-       { XFER_PIO_4,     25,  70,  25, 120,  70,  25, 120,   0 },
-       { XFER_PIO_5,     15,  65,  25, 100,  65,  25, 100,   0 },
-       { XFER_PIO_6,     10,  55,  20,  80,  55,  20,  80,   0 },
-
-       { XFER_SW_DMA_0, 120,   0,   0,   0, 480, 480, 960,   0 },
-       { XFER_SW_DMA_1,  90,   0,   0,   0, 240, 240, 480,   0 },
-       { XFER_SW_DMA_2,  60,   0,   0,   0, 120, 120, 240,   0 },
-
-       { XFER_MW_DMA_0,  60,   0,   0,   0, 215, 215, 480,   0 },
-       { XFER_MW_DMA_1,  45,   0,   0,   0,  80,  50, 150,   0 },
-       { XFER_MW_DMA_2,  25,   0,   0,   0,  70,  25, 120,   0 },
-       { XFER_MW_DMA_3,  25,   0,   0,   0,  65,  25, 100,   0 },
-       { XFER_MW_DMA_4,  25,   0,   0,   0,  55,  20,  80,   0 },
-
-/*     { XFER_UDMA_SLOW,  0,   0,   0,   0,   0,   0,   0, 150 }, */
-       { XFER_UDMA_0,     0,   0,   0,   0,   0,   0,   0, 120 },
-       { XFER_UDMA_1,     0,   0,   0,   0,   0,   0,   0,  80 },
-       { XFER_UDMA_2,     0,   0,   0,   0,   0,   0,   0,  60 },
-       { XFER_UDMA_3,     0,   0,   0,   0,   0,   0,   0,  45 },
-       { XFER_UDMA_4,     0,   0,   0,   0,   0,   0,   0,  30 },
-       { XFER_UDMA_5,     0,   0,   0,   0,   0,   0,   0,  20 },
-       { XFER_UDMA_6,     0,   0,   0,   0,   0,   0,   0,  15 },
+/*     { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 0,  960,   0 }, */
+       { XFER_PIO_0,     70, 290, 240, 600, 165, 150, 0,  600,   0 },
+       { XFER_PIO_1,     50, 290,  93, 383, 125, 100, 0,  383,   0 },
+       { XFER_PIO_2,     30, 290,  40, 330, 100,  90, 0,  240,   0 },
+       { XFER_PIO_3,     30,  80,  70, 180,  80,  70, 0,  180,   0 },
+       { XFER_PIO_4,     25,  70,  25, 120,  70,  25, 0,  120,   0 },
+       { XFER_PIO_5,     15,  65,  25, 100,  65,  25, 0,  100,   0 },
+       { XFER_PIO_6,     10,  55,  20,  80,  55,  20, 0,   80,   0 },
+
+       { XFER_SW_DMA_0, 120,   0,   0,   0, 480, 480, 50, 960,   0 },
+       { XFER_SW_DMA_1,  90,   0,   0,   0, 240, 240, 30, 480,   0 },
+       { XFER_SW_DMA_2,  60,   0,   0,   0, 120, 120, 20, 240,   0 },
+
+       { XFER_MW_DMA_0,  60,   0,   0,   0, 215, 215, 20, 480,   0 },
+       { XFER_MW_DMA_1,  45,   0,   0,   0,  80,  50, 5,  150,   0 },
+       { XFER_MW_DMA_2,  25,   0,   0,   0,  70,  25, 5,  120,   0 },
+       { XFER_MW_DMA_3,  25,   0,   0,   0,  65,  25, 5,  100,   0 },
+       { XFER_MW_DMA_4,  25,   0,   0,   0,  55,  20, 5,   80,   0 },
+
+/*     { XFER_UDMA_SLOW,  0,   0,   0,   0,   0,   0, 0,    0, 150 }, */
+       { XFER_UDMA_0,     0,   0,   0,   0,   0,   0, 0,    0, 120 },
+       { XFER_UDMA_1,     0,   0,   0,   0,   0,   0, 0,    0,  80 },
+       { XFER_UDMA_2,     0,   0,   0,   0,   0,   0, 0,    0,  60 },
+       { XFER_UDMA_3,     0,   0,   0,   0,   0,   0, 0,    0,  45 },
+       { XFER_UDMA_4,     0,   0,   0,   0,   0,   0, 0,    0,  30 },
+       { XFER_UDMA_5,     0,   0,   0,   0,   0,   0, 0,    0,  20 },
+       { XFER_UDMA_6,     0,   0,   0,   0,   0,   0, 0,    0,  15 },
 
        { 0xFF }
 };
@@ -3065,14 +3065,15 @@ static const struct ata_timing ata_timing[] = {
 
 static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing 
*q, int T, int UT)
 {
-       q->setup   = EZ(t->setup   * 1000,  T);
-       q->act8b   = EZ(t->act8b   * 1000,  T);
-       q->rec8b   = EZ(t->rec8b   * 1000,  T);
-       q->cyc8b   = EZ(t->cyc8b   * 1000,  T);
-       q->active  = EZ(t->active  * 1000,  T);
-       q->recover = EZ(t->recover * 1000,  T);
-       q->cycle   = EZ(t->cycle   * 1000,  T);
-       q->udma    = EZ(t->udma    * 1000, UT);
+       q->setup        = EZ(t->setup      * 1000,  T);
+       q->act8b        = EZ(t->act8b      * 1000,  T);
+       q->rec8b        = EZ(t->rec8b      * 1000,  T);
+       q->cyc8b        = EZ(t->cyc8b      * 1000,  T);
+       q->active       = EZ(t->active     * 1000,  T);
+       q->recover      = EZ(t->recover    * 1000,  T);
+       q->dmack_hold   = EZ(t->dmack_hold * 1000,  T);
+       q->cycle        = EZ(t->cycle      * 1000,  T);
+       q->udma         = EZ(t->udma       * 1000, UT);
 }
 
 void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
@@ -3084,6 +3085,7 @@ void ata_timing_merge(const struct ata_timing *a, const 
struct ata_timing *b,
        if (what & ATA_TIMING_CYC8B  ) m->cyc8b   = max(a->cyc8b,   b->cyc8b);
        if (what & ATA_TIMING_ACTIVE ) m->active  = max(a->active,  b->active);
        if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
+       if (what & ATA_TIMING_DMACK_HOLD) m->dmack_hold = max(a->dmack_hold, 
b->dmack_hold);
        if (what & ATA_TIMING_CYCLE  ) m->cycle   = max(a->cycle,   b->cycle);
        if (what & ATA_TIMING_UDMA   ) m->udma    = max(a->udma,    b->udma);
 }
diff --git a/include/linux/libata.h b/include/linux/libata.h
index b6b8a7f..9c308b4 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -401,12 +401,14 @@ enum {
                                  ATA_TIMING_CYC8B,
        ATA_TIMING_ACTIVE       = (1 << 4),
        ATA_TIMING_RECOVER      = (1 << 5),
-       ATA_TIMING_CYCLE        = (1 << 6),
-       ATA_TIMING_UDMA         = (1 << 7),
+       ATA_TIMING_DMACK_HOLD   = (1 << 6),
+       ATA_TIMING_CYCLE        = (1 << 7),
+       ATA_TIMING_UDMA         = (1 << 8),
        ATA_TIMING_ALL          = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
                                  ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
                                  ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
-                                 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
+                                 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE |
+                                 ATA_TIMING_UDMA,
 };
 
 enum ata_xfer_mask {
@@ -866,6 +868,7 @@ struct ata_timing {
        unsigned short cyc8b;           /* t0 for 8-bit I/O */
        unsigned short active;          /* t2 or tD */
        unsigned short recover;         /* t2i or tK */
+       unsigned short dmack_hold;      /* tj */
        unsigned short cycle;           /* t0 */
        unsigned short udma;            /* t2CYCTYP/2 */
 };
-- 
1.5.6.6


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