diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/ide/ppc/pmac.c | 40 |
1 files changed, 12 insertions, 28 deletions
diff --git a/drivers/ide/ppc/pmac.c b/drivers/ide/ppc/pmac.c index cfbe5690ca8..b24e905ddcd 100644 --- a/drivers/ide/ppc/pmac.c +++ b/drivers/ide/ppc/pmac.c @@ -770,12 +770,13 @@ set_timings_udma_shasta(u32 *pio_timings, u32 *ultra_timings, u8 speed) /* * Calculate MDMA timings for all cells */ -static int +static void set_timings_mdma(ide_drive_t *drive, int intf_type, u32 *timings, u32 *timings2, - u8 speed, int drive_cycle_time) + u8 speed) { int cycleTime, accessTime = 0, recTime = 0; unsigned accessTicks, recTicks; + struct hd_driveid *id = drive->id; struct mdma_timings_t* tm = NULL; int i; @@ -785,11 +786,14 @@ set_timings_mdma(ide_drive_t *drive, int intf_type, u32 *timings, u32 *timings2, case 1: cycleTime = 150; break; case 2: cycleTime = 120; break; default: - return 1; + BUG(); + break; } - /* Adjust for drive */ - if (drive_cycle_time && drive_cycle_time > cycleTime) - cycleTime = drive_cycle_time; + + /* Check if drive provides explicit DMA cycle time */ + if ((id->field_valid & 2) && id->eide_dma_time) + cycleTime = max_t(int, id->eide_dma_time, cycleTime); + /* OHare limits according to some old Apple sources */ if ((intf_type == controller_ohare) && (cycleTime < 150)) cycleTime = 150; @@ -817,8 +821,6 @@ set_timings_mdma(ide_drive_t *drive, int intf_type, u32 *timings, u32 *timings2, break; i++; } - if (i < 0) - return 1; cycleTime = tm[i].cycleTime; accessTime = tm[i].accessTime; recTime = tm[i].recoveryTime; @@ -900,16 +902,12 @@ set_timings_mdma(ide_drive_t *drive, int intf_type, u32 *timings, u32 *timings2, printk(KERN_ERR "%s: Set MDMA timing for mode %d, reg: 0x%08x\n", drive->name, speed & 0xf, *timings); #endif - return 0; } #endif /* #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC */ /* * Speedproc. This function is called by the core to set any of the standard * DMA timing (MDMA or UDMA) to both the drive and the controller. - * You may notice we don't use this function on normal "dma check" operation, - * our dedicated function is more precise as it uses the drive provided - * cycle time value. We should probably fix this one to deal with that too... */ static int pmac_ide_tune_chipset(ide_drive_t *drive, const u8 speed) { @@ -947,7 +945,7 @@ static int pmac_ide_tune_chipset(ide_drive_t *drive, const u8 speed) case XFER_MW_DMA_2: case XFER_MW_DMA_1: case XFER_MW_DMA_0: - ret = set_timings_mdma(drive, pmif->kind, &tl[0], &tl[1], speed, 0); + set_timings_mdma(drive, pmif->kind, &tl[0], &tl[1], speed); break; case XFER_SW_DMA_2: case XFER_SW_DMA_1: @@ -1680,8 +1678,6 @@ pmac_ide_mdma_enable(ide_drive_t *drive, u16 mode) { ide_hwif_t *hwif = HWIF(drive); pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)hwif->hwif_data; - int drive_cycle_time; - struct hd_driveid *id = drive->id; u32 *timings, *timings2; u32 timing_local[2]; int ret; @@ -1690,24 +1686,12 @@ pmac_ide_mdma_enable(ide_drive_t *drive, u16 mode) timings = &pmif->timings[drive->select.b.unit & 0x01]; timings2 = &pmif->timings[(drive->select.b.unit & 0x01) + 2]; - /* Check if drive provide explicit cycle time */ - if ((id->field_valid & 2) && (id->eide_dma_time)) - drive_cycle_time = id->eide_dma_time; - else - drive_cycle_time = 0; - /* Copy timings to local image */ timing_local[0] = *timings; timing_local[1] = *timings2; /* Calculate controller timings */ - ret = set_timings_mdma( drive, pmif->kind, - &timing_local[0], - &timing_local[1], - mode, - drive_cycle_time); - if (ret) - return 0; + set_timings_mdma(drive, pmif->kind, &timing_local[0], &timing_local[1], mode); /* Set feature on drive */ printk(KERN_INFO "%s: Enabling MultiWord DMA %d\n", drive->name, mode & 0xf); |