/* * 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, ®U); 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[] __devinitdata = { { /* 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 __devinit 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");