Initial import

1 files changed, 448 insertions, 0 deletions

diff --git a/drivers/ide/cmd64x.c b/drivers/ide/cmd64x.c
new file mode 100644
index 000000000..b127ed60c
--- /dev/null
+++ b/drivers/ide/cmd64x.c
@@ -0,0 +1,448 @@
+/*
+ * cmd64x.c: Enable interrupts at initialization time on Ultra/PCI machines.
+ *           Due to massive hardware bugs, UltraDMA is only supported
+ *           on the 646U2 and not on the 646U.
+ *
+ * Copyright (C) 1998		Eddie C. Dost  (ecd@skynet.be)
+ * 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>
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+
+#define DRV_NAME "cmd64x"
+
+/*
+ * CMD64x specific registers definition.
+ */
+#define CFR		0x50
+#define   CFR_INTR_CH0		0x04
+
+#define	CMDTIM		0x52
+#define	ARTTIM0		0x53
+#define	DRWTIM0		0x54
+#define ARTTIM1 	0x55
+#define DRWTIM1		0x56
+#define ARTTIM23	0x57
+#define   ARTTIM23_DIS_RA2	0x04
+#define   ARTTIM23_DIS_RA3	0x08
+#define   ARTTIM23_INTR_CH1	0x10
+#define DRWTIM2		0x58
+#define BRST		0x59
+#define DRWTIM3		0x5b
+
+#define BMIDECR0	0x70
+#define MRDMODE		0x71
+#define   MRDMODE_INTR_CH0	0x04
+#define   MRDMODE_INTR_CH1	0x08
+#define UDIDETCR0	0x73
+#define DTPR0		0x74
+#define BMIDECR1	0x78
+#define BMIDECSR	0x79
+#define UDIDETCR1	0x7B
+#define DTPR1		0x7C
+
+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 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;
+
+	ide_timing_compute(drive, mode, &t, T, 0);
+
+	/*
+	 * In case we've got too long recovery phase, try to lengthen
+	 * the active phase
+	 */
+	if (t.recover > 16) {
+		t.active += t.recover - 16;
+		t.recover = 16;
+	}
+	if (t.active > 16)		/* shouldn't actually happen... */
+		t.active = 16;
+
+	/*
+	 * Convert values to internal chipset representation
+	 */
+	t.recover = recovery_values[t.recover];
+	t.active &= 0x0f;
+
+	/* Program the active/recovery counts into the DRWTIM register */
+	pci_write_config_byte(dev, drwtim_regs[drive->dn],
+			      (t.active << 4) | t.recover);
+
+	/*
+	 * The primary channel has individual address setup timing registers
+	 * for each drive and the hardware selects the slowest timing itself.
+	 * The secondary channel has one common register and we have to select
+	 * the slowest address setup timing ourselves.
+	 */
+	if (hwif->channel) {
+		ide_drive_t *pair = ide_get_pair_dev(drive);
+
+		if (pair) {
+			struct ide_timing tp;
+
+			ide_timing_compute(pair, pair->pio_mode, &tp, T, 0);
+			ide_timing_merge(&t, &tp, &t, IDE_TIMING_SETUP);
+			if (pair->dma_mode) {
+				ide_timing_compute(pair, pair->dma_mode,
+						&tp, T, 0);
+				ide_timing_merge(&tp, &t, &t, IDE_TIMING_SETUP);
+			}
+		}
+	}
+
+	if (t.setup > 5)		/* shouldn't actually happen... */
+		t.setup = 5;
+
+	/*
+	 * Program the address setup clocks into the ARTTIM registers.
+	 * Avoid clearing the secondary channel's interrupt bit.
+	 */
+	(void) pci_read_config_byte (dev, arttim_regs[drive->dn], &arttim);
+	if (hwif->channel)
+		arttim &= ~ARTTIM23_INTR_CH1;
+	arttim &= ~0xc0;
+	arttim |= setup_values[t.setup];
+	(void) pci_write_config_byte(dev, arttim_regs[drive->dn], arttim);
+}
+
+/*
+ * Attempts to set drive's PIO mode.
+ * Special cases are 8: prefetch off, 9: prefetch on (both never worked)
+ */
+
+static void cmd64x_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	const u8 pio = drive->pio_mode - XFER_PIO_0;
+
+	/*
+	 * Filter out the prefetch control values
+	 * to prevent PIO5 from being programmed
+	 */
+	if (pio == 8 || pio == 9)
+		return;
+
+	cmd64x_program_timings(drive, XFER_PIO_0 + pio);
+}
+
+static void cmd64x_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	u8 unit			= drive->dn & 0x01;
+	u8 regU = 0, pciU	= hwif->channel ? UDIDETCR1 : UDIDETCR0;
+	const u8 speed		= drive->dma_mode;
+
+	pci_read_config_byte(dev, pciU, &regU);
+	regU &= ~(unit ? 0xCA : 0x35);
+
+	switch(speed) {
+	case XFER_UDMA_5:
+		regU |= unit ? 0x0A : 0x05;
+		break;
+	case XFER_UDMA_4:
+		regU |= unit ? 0x4A : 0x15;
+		break;
+	case XFER_UDMA_3:
+		regU |= unit ? 0x8A : 0x25;
+		break;
+	case XFER_UDMA_2:
+		regU |= unit ? 0x42 : 0x11;
+		break;
+	case XFER_UDMA_1:
+		regU |= unit ? 0x82 : 0x21;
+		break;
+	case XFER_UDMA_0:
+		regU |= unit ? 0xC2 : 0x31;
+		break;
+	case XFER_MW_DMA_2:
+	case XFER_MW_DMA_1:
+	case XFER_MW_DMA_0:
+		cmd64x_program_timings(drive, speed);
+		break;
+	}
+
+	pci_write_config_byte(dev, pciU, regU);
+}
+
+static void cmd648_clear_irq(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif	= drive->hwif;
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	unsigned long base	= pci_resource_start(dev, 4);
+	u8  irq_mask		= hwif->channel ? MRDMODE_INTR_CH1 :
+						  MRDMODE_INTR_CH0;
+	u8  mrdmode		= inb(base + 1);
+
+	/* clear the interrupt bit */
+	outb((mrdmode & ~(MRDMODE_INTR_CH0 | MRDMODE_INTR_CH1)) | irq_mask,
+	     base + 1);
+}
+
+static void cmd64x_clear_irq(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif	= drive->hwif;
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	int irq_reg		= hwif->channel ? ARTTIM23 : CFR;
+	u8  irq_mask		= hwif->channel ? ARTTIM23_INTR_CH1 :
+						  CFR_INTR_CH0;
+	u8  irq_stat		= 0;
+
+	(void) pci_read_config_byte(dev, irq_reg, &irq_stat);
+	/* clear the interrupt bit */
+	(void) pci_write_config_byte(dev, irq_reg, irq_stat | irq_mask);
+}
+
+static int cmd648_test_irq(ide_hwif_t *hwif)
+{
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	unsigned long base	= pci_resource_start(dev, 4);
+	u8 irq_mask		= hwif->channel ? MRDMODE_INTR_CH1 :
+						  MRDMODE_INTR_CH0;
+	u8 mrdmode		= inb(base + 1);
+
+	pr_debug("%s: mrdmode: 0x%02x irq_mask: 0x%02x\n",
+		 hwif->name, mrdmode, irq_mask);
+
+	return (mrdmode & irq_mask) ? 1 : 0;
+}
+
+static int cmd64x_test_irq(ide_hwif_t *hwif)
+{
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	int irq_reg		= hwif->channel ? ARTTIM23 : CFR;
+	u8  irq_mask		= hwif->channel ? ARTTIM23_INTR_CH1 :
+						  CFR_INTR_CH0;
+	u8  irq_stat		= 0;
+
+	(void) pci_read_config_byte(dev, irq_reg, &irq_stat);
+
+	pr_debug("%s: irq_stat: 0x%02x irq_mask: 0x%02x\n",
+		 hwif->name, irq_stat, irq_mask);
+
+	return (irq_stat & irq_mask) ? 1 : 0;
+}
+
+/*
+ * ASUS P55T2P4D with CMD646 chipset revision 0x01 requires the old
+ * event order for DMA transfers.
+ */
+
+static int cmd646_1_dma_end(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	u8 dma_stat = 0, dma_cmd = 0;
+
+	/* get DMA status */
+	dma_stat = inb(hwif->dma_base + ATA_DMA_STATUS);
+	/* read DMA command state */
+	dma_cmd = inb(hwif->dma_base + ATA_DMA_CMD);
+	/* stop DMA */
+	outb(dma_cmd & ~1, hwif->dma_base + ATA_DMA_CMD);
+	/* clear the INTR & ERROR bits */
+	outb(dma_stat | 6, hwif->dma_base + ATA_DMA_STATUS);
+	/* verify good DMA status */
+	return (dma_stat & 7) != 4;
+}
+
+static int init_chipset_cmd64x(struct pci_dev *dev)
+{
+	u8 mrdmode = 0;
+
+	/* Set a good latency timer and cache line size value. */
+	(void) pci_write_config_byte(dev, PCI_LATENCY_TIMER, 64);
+	/* FIXME: pci_set_master() to ensure a good latency timer value */
+
+	/*
+	 * Enable interrupts, select MEMORY READ LINE for reads.
+	 *
+	 * NOTE: although not mentioned in the PCI0646U specs,
+	 * bits 0-1 are write only and won't be read back as
+	 * set or not -- PCI0646U2 specs clarify this point.
+	 */
+	(void) pci_read_config_byte (dev, MRDMODE, &mrdmode);
+	mrdmode &= ~0x30;
+	(void) pci_write_config_byte(dev, MRDMODE, (mrdmode | 0x02));
+
+	return 0;
+}
+
+static u8 cmd64x_cable_detect(ide_hwif_t *hwif)
+{
+	struct pci_dev  *dev	= to_pci_dev(hwif->dev);
+	u8 bmidecsr = 0, mask	= hwif->channel ? 0x02 : 0x01;
+
+	switch (dev->device) {
+	case PCI_DEVICE_ID_CMD_648:
+	case PCI_DEVICE_ID_CMD_649:
+ 		pci_read_config_byte(dev, BMIDECSR, &bmidecsr);
+		return (bmidecsr & mask) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
+	default:
+		return ATA_CBL_PATA40;
+	}
+}
+
+static const struct ide_port_ops cmd64x_port_ops = {
+	.set_pio_mode		= cmd64x_set_pio_mode,
+	.set_dma_mode		= cmd64x_set_dma_mode,
+	.clear_irq		= cmd64x_clear_irq,
+	.test_irq		= cmd64x_test_irq,
+	.cable_detect		= cmd64x_cable_detect,
+};
+
+static const struct ide_port_ops cmd648_port_ops = {
+	.set_pio_mode		= cmd64x_set_pio_mode,
+	.set_dma_mode		= cmd64x_set_dma_mode,
+	.clear_irq		= cmd648_clear_irq,
+	.test_irq		= cmd648_test_irq,
+	.cable_detect		= cmd64x_cable_detect,
+};
+
+static const struct ide_dma_ops cmd646_rev1_dma_ops = {
+	.dma_host_set		= ide_dma_host_set,
+	.dma_setup		= ide_dma_setup,
+	.dma_start		= ide_dma_start,
+	.dma_end		= cmd646_1_dma_end,
+	.dma_test_irq		= ide_dma_test_irq,
+	.dma_lost_irq		= ide_dma_lost_irq,
+	.dma_timer_expiry	= ide_dma_sff_timer_expiry,
+	.dma_sff_read_status	= ide_dma_sff_read_status,
+};
+
+static const struct ide_port_info cmd64x_chipsets[] = {
+	{	/* 0: CMD643 */
+		.name		= DRV_NAME,
+		.init_chipset	= init_chipset_cmd64x,
+		.enablebits	= {{0x00,0x00,0x00}, {0x51,0x08,0x08}},
+		.port_ops	= &cmd64x_port_ops,
+		.host_flags	= IDE_HFLAG_CLEAR_SIMPLEX |
+				  IDE_HFLAG_ABUSE_PREFETCH |
+				  IDE_HFLAG_SERIALIZE,
+		.pio_mask	= ATA_PIO5,
+		.mwdma_mask	= ATA_MWDMA2,
+		.udma_mask	= 0x00, /* no udma */
+	},
+	{	/* 1: CMD646 */
+		.name		= DRV_NAME,
+		.init_chipset	= init_chipset_cmd64x,
+		.enablebits	= {{0x51,0x04,0x04}, {0x51,0x08,0x08}},
+		.port_ops	= &cmd648_port_ops,
+		.host_flags	= IDE_HFLAG_ABUSE_PREFETCH |
+				  IDE_HFLAG_SERIALIZE,
+		.pio_mask	= ATA_PIO5,
+		.mwdma_mask	= ATA_MWDMA2,
+		.udma_mask	= ATA_UDMA2,
+	},
+	{	/* 2: CMD648 */
+		.name		= DRV_NAME,
+		.init_chipset	= init_chipset_cmd64x,
+		.enablebits	= {{0x51,0x04,0x04}, {0x51,0x08,0x08}},
+		.port_ops	= &cmd648_port_ops,
+		.host_flags	= IDE_HFLAG_ABUSE_PREFETCH,
+		.pio_mask	= ATA_PIO5,
+		.mwdma_mask	= ATA_MWDMA2,
+		.udma_mask	= ATA_UDMA4,
+	},
+	{	/* 3: CMD649 */
+		.name		= DRV_NAME,
+		.init_chipset	= init_chipset_cmd64x,
+		.enablebits	= {{0x51,0x04,0x04}, {0x51,0x08,0x08}},
+		.port_ops	= &cmd648_port_ops,
+		.host_flags	= IDE_HFLAG_ABUSE_PREFETCH,
+		.pio_mask	= ATA_PIO5,
+		.mwdma_mask	= ATA_MWDMA2,
+		.udma_mask	= ATA_UDMA5,
+	}
+};
+
+static int cmd64x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	struct ide_port_info d;
+	u8 idx = id->driver_data;
+
+	d = cmd64x_chipsets[idx];
+
+	if (idx == 1) {
+		/*
+		 * UltraDMA only supported on PCI646U and PCI646U2, which
+		 * correspond to revisions 0x03, 0x05 and 0x07 respectively.
+		 * Actually, although the CMD tech support people won't
+		 * tell me the details, the 0x03 revision cannot support
+		 * UDMA correctly without hardware modifications, and even
+		 * then it only works with Quantum disks due to some
+		 * hold time assumptions in the 646U part which are fixed
+		 * in the 646U2.
+		 *
+		 * So we only do UltraDMA on revision 0x05 and 0x07 chipsets.
+		 */
+		if (dev->revision < 5) {
+			d.udma_mask = 0x00;
+			/*
+			 * The original PCI0646 didn't have the primary
+			 * channel enable bit, it appeared starting with
+			 * PCI0646U (i.e. revision ID 3).
+			 */
+			if (dev->revision < 3) {
+				d.enablebits[0].reg = 0;
+				d.port_ops = &cmd64x_port_ops;
+				if (dev->revision == 1)
+					d.dma_ops = &cmd646_rev1_dma_ops;
+			}
+		}
+	}
+
+	return ide_pci_init_one(dev, &d, NULL);
+}
+
+static const struct pci_device_id cmd64x_pci_tbl[] = {
+	{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_643), 0 },
+	{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_646), 1 },
+	{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_648), 2 },
+	{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_649), 3 },
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, cmd64x_pci_tbl);
+
+static struct pci_driver cmd64x_pci_driver = {
+	.name		= "CMD64x_IDE",
+	.id_table	= cmd64x_pci_tbl,
+	.probe		= cmd64x_init_one,
+	.remove		= ide_pci_remove,
+	.suspend	= ide_pci_suspend,
+	.resume		= ide_pci_resume,
+};
+
+static int __init cmd64x_ide_init(void)
+{
+	return ide_pci_register_driver(&cmd64x_pci_driver);
+}
+
+static void __exit cmd64x_ide_exit(void)
+{
+	pci_unregister_driver(&cmd64x_pci_driver);
+}
+
+module_init(cmd64x_ide_init);
+module_exit(cmd64x_ide_exit);
+
+MODULE_AUTHOR("Eddie Dost, David Miller, Andre Hedrick, Bartlomiej Zolnierkiewicz");
+MODULE_DESCRIPTION("PCI driver module for CMD64x IDE");
+MODULE_LICENSE("GPL");