ide: add support for CFA specified transfer modes (take 3)

Add support for the CompactFlash specific PIO modes 5/6 and MWDMA modes 3/4.

Since there were no PIO5 capable hard drives produced and one would also need
66 MHz IDE clock to actually get the difference WRT the address setup timings
programmed, I decided to simply replace the old non-standard PIO mode 5 timings
with the CFA specified ones.

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: stf_xl@wp.pl
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

5 files changed, 40 insertions, 10 deletions

diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
index f9c91752f275..a0b8cab1d9a6 100644
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -261,6 +261,14 @@ static unsigned int ide_get_mode_mask(ide_drive_t *drive, u8 base, u8 req_mode)
                 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
diff --git a/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c
index 0e62698146b6..0caca342802d 100644
--- a/drivers/ide/ide-iops.c
+++ b/drivers/ide/ide-iops.c
@@ -306,6 +306,7 @@ int ide_driveid_update(ide_drive_t *drive)
         drive->id[ATA_ID_UDMA_MODES]  = id[ATA_ID_UDMA_MODES];
         drive->id[ATA_ID_MWDMA_MODES] = id[ATA_ID_MWDMA_MODES];
         drive->id[ATA_ID_SWDMA_MODES] = id[ATA_ID_SWDMA_MODES];
+        drive->id[ATA_ID_CFA_MODES]   = id[ATA_ID_CFA_MODES];
         /* anything more ? */
 
         kfree(id);
@@ -390,7 +391,10 @@ int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
                 id[ATA_ID_UDMA_MODES]  &= ~0xFF00;
                 id[ATA_ID_MWDMA_MODES] &= ~0x0700;
                 id[ATA_ID_SWDMA_MODES] &= ~0x0700;
-        }
+                if (ata_id_is_cfa(id))
+                        id[ATA_ID_CFA_MODES] &= ~0x0E00;
+        } else  if (ata_id_is_cfa(id))
+                id[ATA_ID_CFA_MODES] &= ~0x01C0;
 
  skip:
 #ifdef CONFIG_BLK_DEV_IDEDMA
@@ -403,12 +407,18 @@ int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
         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)
diff --git a/drivers/ide/ide-timings.c b/drivers/ide/ide-timings.c
index 81f527af8fae..001a56365be5 100644
--- a/drivers/ide/ide-timings.c
+++ b/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 *drive, u8 pio)
                 /* 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 *drive, u8 speed,
 
                 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];
diff --git a/drivers/ide/ide-xfer-mode.c b/drivers/ide/ide-xfer-mode.c
index 6910f6a257e8..af44be9d546c 100644
--- a/drivers/ide/ide-xfer-mode.c
+++ b/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 *drive, u8 mode_wanted, u8 max_mode)
                 }
 
                 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, u8 rate)
 
         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);
diff --git a/drivers/ide/sl82c105.c b/drivers/ide/sl82c105.c
index d6f8977191c8..b0a460625335 100644
--- a/drivers/ide/sl82c105.c
+++ b/drivers/ide/sl82c105.c
@@ -61,7 +61,8 @@ static unsigned int get_pio_timings(ide_drive_t *drive, u8 pio)
         if (cmd_off == 0)
                 cmd_off = 1;
 
-        if (pio > 2 || ata_id_has_iordy(drive->id))
+        if ((pio > 2 || ata_id_has_iordy(drive->id)) &&
+            !(pio > 4 && ata_id_is_cfa(drive->id)))
                 iordy = 0x40;
 
         return (cmd_on - 1) << 8 | (cmd_off - 1) | iordy;