Index: b/drivers/ide/cmd64x.c
===================================================================
--- a/drivers/ide/cmd64x.c
+++ b/drivers/ide/cmd64x.c
@@ -7,6 +7,7 @@
  * Copyright (C) 1998		David S. Miller (davem@redhat.com)
  *
  * Copyright (C) 1999-2002	Andre Hedrick <andre@linux-ide.org>
+ * Copyright (C) 2007-2010	Bartlomiej Zolnierkiewicz
  * Copyright (C) 2007,2009	MontaVista Software, Inc. <source@mvista.com>
  */
 
@@ -50,72 +51,45 @@
 #define UDIDETCR1	0x7B
 #define DTPR1		0x7C
 
-static u8 quantize_timing(int timing, int quant)
-{
-	return (timing + quant - 1) / quant;
-}
-
-/*
- * This routine calculates active/recovery counts and then writes them into
- * the chipset registers.
- */
-static void program_cycle_times (ide_drive_t *drive, int cycle_time, int active_time)
+static void cmd64x_program_timings(ide_drive_t *drive, u8 mode)
 {
+	ide_hwif_t *hwif = drive->hwif;
 	struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
-	int clock_time = 1000 / (ide_pci_clk ? ide_pci_clk : 33);
-	u8  cycle_count, active_count, recovery_count, drwtim;
+	int bus_speed = ide_pci_clk ? ide_pci_clk : 33;
+	const unsigned long T = 1000000 / bus_speed;
 	static const u8 recovery_values[] =
 		{15, 15, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 0};
+	static const u8 setup_values[] = {0x40, 0x40, 0x40, 0x80, 0, 0xc0};
+	static const u8 arttim_regs[4] = {ARTTIM0, ARTTIM1, ARTTIM23, ARTTIM23};
 	static const u8 drwtim_regs[4] = {DRWTIM0, DRWTIM1, DRWTIM2, DRWTIM3};
+	struct ide_timing t;
+	u8 arttim = 0;
 
-	cycle_count	= quantize_timing( cycle_time, clock_time);
-	active_count	= quantize_timing(active_time, clock_time);
-	recovery_count	= cycle_count - active_count;
+	ide_timing_compute(drive, mode, &t, T, 0);
 
 	/*
 	 * In case we've got too long recovery phase, try to lengthen
 	 * the active phase
 	 */
-	if (recovery_count > 16) {
-		active_count += recovery_count - 16;
-		recovery_count = 16;
+	if (t.recover > 16) {
+		t.active += t.recover - 16;
+		t.recover = 16;
 	}
-	if (active_count > 16)		/* shouldn't actually happen... */
-	 	active_count = 16;
+	if (t.active > 16)		/* shouldn't actually happen... */
+		t.active = 16;
 
 	/*
 	 * Convert values to internal chipset representation
 	 */
-	recovery_count = recovery_values[recovery_count];
- 	active_count  &= 0x0f;
+	t.recover = recovery_values[t.recover];
+	t.active &= 0x0f;
 
 	/* Program the active/recovery counts into the DRWTIM register */
-	drwtim = (active_count << 4) | recovery_count;
-	(void) pci_write_config_byte(dev, drwtim_regs[drive->dn], drwtim);
-}
+	pci_write_config_byte(dev, drwtim_regs[drive->dn],
+			      (t.active << 4) | t.recover);
 
-/*
- * This routine writes into the chipset registers
- * PIO setup/active/recovery timings.
- */
-static void cmd64x_tune_pio(ide_drive_t *drive, const u8 pio)
-{
-	ide_hwif_t *hwif	= drive->hwif;
-	struct pci_dev *dev	= to_pci_dev(hwif->dev);
-	struct ide_timing *t	= ide_timing_find_mode(XFER_PIO_0 + pio);
-	unsigned long setup_count;
-	unsigned int cycle_time;
-	u8 arttim = 0;
-
-	static const u8 setup_values[] = {0x40, 0x40, 0x40, 0x80, 0, 0xc0};
-	static const u8 arttim_regs[4] = {ARTTIM0, ARTTIM1, ARTTIM23, ARTTIM23};
-
-	cycle_time = ide_pio_cycle_time(drive, pio);
-
-	program_cycle_times(drive, cycle_time, t->active);
-
-	setup_count = quantize_timing(t->setup,
-			1000 / (ide_pci_clk ? ide_pci_clk : 33));
+	if (mode >= XFER_SW_DMA_0)
+		return;
 
 	/*
 	 * The primary channel has individual address setup timing registers
@@ -126,15 +100,15 @@ static void cmd64x_tune_pio(ide_drive_t
 	if (hwif->channel) {
 		ide_drive_t *pair = ide_get_pair_dev(drive);
 
-		ide_set_drivedata(drive, (void *)setup_count);
+		ide_set_drivedata(drive, (void *)(unsigned long)t.setup);
 
 		if (pair)
-			setup_count = max_t(u8, setup_count,
+			t.setup = max_t(u8, t.setup,
 					(unsigned long)ide_get_drivedata(pair));
 	}
 
-	if (setup_count > 5)		/* shouldn't actually happen... */
-		setup_count = 5;
+	if (t.setup > 5)		/* shouldn't actually happen... */
+		t.setup = 5;
 
 	/*
 	 * Program the address setup clocks into the ARTTIM registers.
@@ -144,7 +118,7 @@ static void cmd64x_tune_pio(ide_drive_t
 	if (hwif->channel)
 		arttim &= ~ARTTIM23_INTR_CH1;
 	arttim &= ~0xc0;
-	arttim |= setup_values[setup_count];
+	arttim |= setup_values[t.setup];
 	(void) pci_write_config_byte(dev, arttim_regs[drive->dn], arttim);
 }
 
@@ -162,7 +136,7 @@ static void cmd64x_set_pio_mode(ide_driv
 	if (pio == 8 || pio == 9)
 		return;
 
-	cmd64x_tune_pio(drive, pio);
+	cmd64x_program_timings(drive, XFER_PIO_0 + pio);
 }
 
 static void cmd64x_set_dma_mode(ide_drive_t *drive, const u8 speed)
@@ -197,13 +171,9 @@ static void cmd64x_set_dma_mode(ide_driv
 		regU |= unit ? 0xC2 : 0x31;
 		break;
 	case XFER_MW_DMA_2:
-		program_cycle_times(drive, 120, 70);
-		break;
 	case XFER_MW_DMA_1:
-		program_cycle_times(drive, 150, 80);
-		break;
 	case XFER_MW_DMA_0:
-		program_cycle_times(drive, 480, 215);
+		cmd64x_program_timings(drive, speed);
 		break;
 	}
 
@@ -471,6 +441,6 @@ static void __exit cmd64x_ide_exit(void)
 module_init(cmd64x_ide_init);
 module_exit(cmd64x_ide_exit);
 
-MODULE_AUTHOR("Eddie Dost, David Miller, Andre Hedrick");
+MODULE_AUTHOR("Eddie Dost, David Miller, Andre Hedrick, Bartlomiej Zolnierkiewicz");
 MODULE_DESCRIPTION("PCI driver module for CMD64x IDE");
 MODULE_LICENSE("GPL");
