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author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-10-11 23:54:00 +0200 |
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committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-10-11 23:54:00 +0200 |
commit | 26bcb879c03254545a19c6700fe5bcef6f21e7b1 (patch) | |
tree | dc35f1a7d7860fe0de268ff92189ff0884b689d3 /drivers/ide/pci/cmd64x.c | |
parent | 842c19ad6fc0dbd9ac9d2f8527466201802934cf (diff) | |
download | linux-3.10-26bcb879c03254545a19c6700fe5bcef6f21e7b1.tar.gz linux-3.10-26bcb879c03254545a19c6700fe5bcef6f21e7b1.tar.bz2 linux-3.10-26bcb879c03254545a19c6700fe5bcef6f21e7b1.zip |
ide: add ide_set{_max}_pio() (take 4)
* Add IDE_HFLAG_ABUSE_{PREFETCH,FAST_DEVSEL,DMA_MODES} flags
and set them in ht6560, cmd640, cmd64x and sc1200 host drivers.
* Add set_pio_mode_abuse() for checking if host driver has a non-standard
->tuneproc() implementation and use it in do_special().
* Add ide_set_pio() for setting PIO mode (it uses hwif->pio_mask to find
the maximum PIO mode supported by the host), also add ide_set_max_pio()
wrapper for ide_set_pio() to use for auto-tuning. Convert users of
->tuneproc to use ide_set{_max}_pio() where possible. This leaves only
do_special(), set_using_pio(), ide_hwif_restore() and ide_set_pio() as
a direct users of ->tuneproc.
* Remove no longer needed ide_get_best_pio_mode() calls and printk-s
reporting PIO mode selected from ->tuneproc implementations.
* Rename ->tuneproc hook to ->set_pio_mode and make 'pio' argument const.
* Remove stale comment from ide_config_drive_speed().
v2:
* Fix "ata_" prefix (Noticed by Jeff).
v3:
* Minor cleanups/fixups per Sergei's suggestions.
v4:
* Fix compile problem in drivers/ide/pci/cmd640.c
(Noticed by Andrew Morton).
* Improve some ->set_pio_mode comments.
Reviewed-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide/pci/cmd64x.c')
-rw-r--r-- | drivers/ide/pci/cmd64x.c | 39 |
1 files changed, 19 insertions, 20 deletions
diff --git a/drivers/ide/pci/cmd64x.c b/drivers/ide/pci/cmd64x.c index 5fe50a234ce..85f5e42eb83 100644 --- a/drivers/ide/pci/cmd64x.c +++ b/drivers/ide/pci/cmd64x.c @@ -214,28 +214,25 @@ static void program_cycle_times (ide_drive_t *drive, int cycle_time, int active_ } /* - * This routine selects drive's best PIO mode and writes into the chipset - * registers setup/active/recovery timings. + * This routine writes into the chipset registers + * PIO setup/active/recovery timings. */ -static u8 cmd64x_tune_pio (ide_drive_t *drive, u8 mode_wanted) +static void cmd64x_tune_pio(ide_drive_t *drive, const u8 pio) { ide_hwif_t *hwif = HWIF(drive); struct pci_dev *dev = hwif->pci_dev; unsigned int cycle_time; - u8 pio_mode, setup_count, arttim = 0; + u8 setup_count, arttim = 0; + static const u8 setup_values[] = {0x40, 0x40, 0x40, 0x80, 0, 0xc0}; static const u8 arttim_regs[4] = {ARTTIM0, ARTTIM1, ARTTIM23, ARTTIM23}; - pio_mode = ide_get_best_pio_mode(drive, mode_wanted, 5); - cycle_time = ide_pio_cycle_time(drive, pio_mode); - - cmdprintk("%s: PIO mode wanted %d, selected %d (%d ns)\n", - drive->name, mode_wanted, pio_mode, cycle_time); + cycle_time = ide_pio_cycle_time(drive, pio); program_cycle_times(drive, cycle_time, - ide_pio_timings[pio_mode].active_time); + ide_pio_timings[pio].active_time); - setup_count = quantize_timing(ide_pio_timings[pio_mode].setup_time, + setup_count = quantize_timing(ide_pio_timings[pio].setup_time, 1000 / system_bus_clock()); /* @@ -266,16 +263,14 @@ static u8 cmd64x_tune_pio (ide_drive_t *drive, u8 mode_wanted) arttim |= setup_values[setup_count]; (void) pci_write_config_byte(dev, arttim_regs[drive->dn], arttim); cmdprintk("Write 0x%02x to reg 0x%x\n", arttim, arttim_regs[drive->dn]); - - return pio_mode; } /* * Attempts to set drive's PIO mode. - * Special cases are 8: prefetch off, 9: prefetch on (both never worked), - * and 255: auto-select best mode (used at boot time). + * Special cases are 8: prefetch off, 9: prefetch on (both never worked) */ -static void cmd64x_tune_drive (ide_drive_t *drive, u8 pio) + +static void cmd64x_set_pio_mode(ide_drive_t *drive, const u8 pio) { /* * Filter out the prefetch control values @@ -284,7 +279,7 @@ static void cmd64x_tune_drive (ide_drive_t *drive, u8 pio) if (pio == 8 || pio == 9) return; - pio = cmd64x_tune_pio(drive, pio); + cmd64x_tune_pio(drive, pio); (void) ide_config_drive_speed(drive, XFER_PIO_0 + pio); } @@ -334,7 +329,7 @@ static int cmd64x_tune_chipset(ide_drive_t *drive, const u8 speed) case XFER_PIO_2: case XFER_PIO_1: case XFER_PIO_0: - (void) cmd64x_tune_pio(drive, speed - XFER_PIO_0); + cmd64x_tune_pio(drive, speed - XFER_PIO_0); break; default: return 1; @@ -352,7 +347,7 @@ static int cmd64x_config_drive_for_dma (ide_drive_t *drive) return 0; if (ide_use_fast_pio(drive)) - cmd64x_tune_drive(drive, 255); + ide_set_max_pio(drive); return -1; } @@ -536,7 +531,7 @@ static void __devinit init_hwif_cmd64x(ide_hwif_t *hwif) pci_read_config_byte(dev, PCI_REVISION_ID, &rev); - hwif->tuneproc = &cmd64x_tune_drive; + hwif->set_pio_mode = &cmd64x_set_pio_mode; hwif->speedproc = &cmd64x_tune_chipset; hwif->drives[0].autotune = hwif->drives[1].autotune = 1; @@ -620,6 +615,7 @@ static ide_pci_device_t cmd64x_chipsets[] __devinitdata = { .autodma = AUTODMA, .enablebits = {{0x00,0x00,0x00}, {0x51,0x08,0x08}}, .bootable = ON_BOARD, + .host_flags = IDE_HFLAG_ABUSE_PREFETCH, .pio_mask = ATA_PIO5, .udma_mask = 0x00, /* no udma */ },{ /* 1 */ @@ -630,6 +626,7 @@ static ide_pci_device_t cmd64x_chipsets[] __devinitdata = { .autodma = AUTODMA, .enablebits = {{0x51,0x04,0x04}, {0x51,0x08,0x08}}, .bootable = ON_BOARD, + .host_flags = IDE_HFLAG_ABUSE_PREFETCH, .pio_mask = ATA_PIO5, .udma_mask = 0x07, /* udma0-2 */ },{ /* 2 */ @@ -640,6 +637,7 @@ static ide_pci_device_t cmd64x_chipsets[] __devinitdata = { .autodma = AUTODMA, .enablebits = {{0x51,0x04,0x04}, {0x51,0x08,0x08}}, .bootable = ON_BOARD, + .host_flags = IDE_HFLAG_ABUSE_PREFETCH, .pio_mask = ATA_PIO5, .udma_mask = 0x1f, /* udma0-4 */ },{ /* 3 */ @@ -650,6 +648,7 @@ static ide_pci_device_t cmd64x_chipsets[] __devinitdata = { .autodma = AUTODMA, .enablebits = {{0x51,0x04,0x04}, {0x51,0x08,0x08}}, .bootable = ON_BOARD, + .host_flags = IDE_HFLAG_ABUSE_PREFETCH, .pio_mask = ATA_PIO5, .udma_mask = 0x3f, /* udma0-5 */ } |