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-rw-r--r--drivers/ide/cmd64x.c452
1 files changed, 452 insertions, 0 deletions
diff --git a/drivers/ide/cmd64x.c b/drivers/ide/cmd64x.c
new file mode 100644
index 000000000..943bf944b
--- /dev/null
+++ b/drivers/ide/cmd64x.c
@@ -0,0 +1,452 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * 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;
+
+ if (drive->dn >= ARRAY_SIZE(drwtim_regs))
+ return;
+
+ 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");
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