forked from luck/tmp_suning_uos_patched
35c9b4daf4
All custom ->dma_timeout implementations call the generic one thus it is possible to have only an optional method for resetting DMA engine instead: * Add ->dma_clear method and convert hpt366, pdc202xx_old and sl82c105 host drivers to use it. * Always use ide_dma_timeout() in ide_dma_timeout_retry() and remove ->dma_timeout method. * Make ide_dma_timeout() static. There should be no functional changes caused by this patch. Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
535 lines
14 KiB
C
535 lines
14 KiB
C
/*
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* cmd64x.c: Enable interrupts at initialization time on Ultra/PCI machines.
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* Due to massive hardware bugs, UltraDMA is only supported
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* on the 646U2 and not on the 646U.
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*
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* Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be)
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* Copyright (C) 1998 David S. Miller (davem@redhat.com)
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*
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* Copyright (C) 1999-2002 Andre Hedrick <andre@linux-ide.org>
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* Copyright (C) 2007 MontaVista Software, Inc. <source@mvista.com>
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/ide.h>
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#include <linux/init.h>
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#include <asm/io.h>
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#define DRV_NAME "cmd64x"
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#define CMD_DEBUG 0
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#if CMD_DEBUG
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#define cmdprintk(x...) printk(x)
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#else
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#define cmdprintk(x...)
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#endif
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/*
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* CMD64x specific registers definition.
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*/
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#define CFR 0x50
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#define CFR_INTR_CH0 0x04
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#define CMDTIM 0x52
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#define ARTTIM0 0x53
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#define DRWTIM0 0x54
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#define ARTTIM1 0x55
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#define DRWTIM1 0x56
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#define ARTTIM23 0x57
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#define ARTTIM23_DIS_RA2 0x04
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#define ARTTIM23_DIS_RA3 0x08
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#define ARTTIM23_INTR_CH1 0x10
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#define DRWTIM2 0x58
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#define BRST 0x59
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#define DRWTIM3 0x5b
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#define BMIDECR0 0x70
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#define MRDMODE 0x71
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#define MRDMODE_INTR_CH0 0x04
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#define MRDMODE_INTR_CH1 0x08
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#define UDIDETCR0 0x73
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#define DTPR0 0x74
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#define BMIDECR1 0x78
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#define BMIDECSR 0x79
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#define UDIDETCR1 0x7B
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#define DTPR1 0x7C
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static u8 quantize_timing(int timing, int quant)
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{
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return (timing + quant - 1) / quant;
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}
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/*
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* This routine calculates active/recovery counts and then writes them into
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* the chipset registers.
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*/
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static void program_cycle_times (ide_drive_t *drive, int cycle_time, int active_time)
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{
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struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
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int clock_time = 1000 / (ide_pci_clk ? ide_pci_clk : 33);
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u8 cycle_count, active_count, recovery_count, drwtim;
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static const u8 recovery_values[] =
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{15, 15, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 0};
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static const u8 drwtim_regs[4] = {DRWTIM0, DRWTIM1, DRWTIM2, DRWTIM3};
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cmdprintk("program_cycle_times parameters: total=%d, active=%d\n",
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cycle_time, active_time);
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cycle_count = quantize_timing( cycle_time, clock_time);
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active_count = quantize_timing(active_time, clock_time);
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recovery_count = cycle_count - active_count;
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/*
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* In case we've got too long recovery phase, try to lengthen
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* the active phase
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*/
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if (recovery_count > 16) {
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active_count += recovery_count - 16;
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recovery_count = 16;
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}
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if (active_count > 16) /* shouldn't actually happen... */
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active_count = 16;
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cmdprintk("Final counts: total=%d, active=%d, recovery=%d\n",
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cycle_count, active_count, recovery_count);
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/*
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* Convert values to internal chipset representation
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*/
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recovery_count = recovery_values[recovery_count];
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active_count &= 0x0f;
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/* Program the active/recovery counts into the DRWTIM register */
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drwtim = (active_count << 4) | recovery_count;
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(void) pci_write_config_byte(dev, drwtim_regs[drive->dn], drwtim);
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cmdprintk("Write 0x%02x to reg 0x%x\n", drwtim, drwtim_regs[drive->dn]);
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}
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/*
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* This routine writes into the chipset registers
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* PIO setup/active/recovery timings.
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*/
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static void cmd64x_tune_pio(ide_drive_t *drive, const u8 pio)
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{
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ide_hwif_t *hwif = drive->hwif;
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struct pci_dev *dev = to_pci_dev(hwif->dev);
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struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio);
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unsigned int cycle_time;
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u8 setup_count, arttim = 0;
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static const u8 setup_values[] = {0x40, 0x40, 0x40, 0x80, 0, 0xc0};
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static const u8 arttim_regs[4] = {ARTTIM0, ARTTIM1, ARTTIM23, ARTTIM23};
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cycle_time = ide_pio_cycle_time(drive, pio);
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program_cycle_times(drive, cycle_time, t->active);
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setup_count = quantize_timing(t->setup,
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1000 / (ide_pci_clk ? ide_pci_clk : 33));
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/*
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* The primary channel has individual address setup timing registers
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* for each drive and the hardware selects the slowest timing itself.
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* The secondary channel has one common register and we have to select
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* the slowest address setup timing ourselves.
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*/
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if (hwif->channel) {
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ide_drive_t *pair = ide_get_pair_dev(drive);
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drive->drive_data = setup_count;
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if (pair)
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setup_count = max_t(u8, setup_count, pair->drive_data);
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}
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if (setup_count > 5) /* shouldn't actually happen... */
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setup_count = 5;
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cmdprintk("Final address setup count: %d\n", setup_count);
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/*
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* Program the address setup clocks into the ARTTIM registers.
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* Avoid clearing the secondary channel's interrupt bit.
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*/
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(void) pci_read_config_byte (dev, arttim_regs[drive->dn], &arttim);
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if (hwif->channel)
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arttim &= ~ARTTIM23_INTR_CH1;
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arttim &= ~0xc0;
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arttim |= setup_values[setup_count];
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(void) pci_write_config_byte(dev, arttim_regs[drive->dn], arttim);
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cmdprintk("Write 0x%02x to reg 0x%x\n", arttim, arttim_regs[drive->dn]);
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}
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/*
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* Attempts to set drive's PIO mode.
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* Special cases are 8: prefetch off, 9: prefetch on (both never worked)
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*/
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static void cmd64x_set_pio_mode(ide_drive_t *drive, const u8 pio)
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{
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/*
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* Filter out the prefetch control values
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* to prevent PIO5 from being programmed
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*/
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if (pio == 8 || pio == 9)
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return;
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cmd64x_tune_pio(drive, pio);
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}
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static void cmd64x_set_dma_mode(ide_drive_t *drive, const u8 speed)
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{
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ide_hwif_t *hwif = drive->hwif;
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struct pci_dev *dev = to_pci_dev(hwif->dev);
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u8 unit = drive->dn & 0x01;
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u8 regU = 0, pciU = hwif->channel ? UDIDETCR1 : UDIDETCR0;
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if (speed >= XFER_SW_DMA_0) {
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(void) pci_read_config_byte(dev, pciU, ®U);
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regU &= ~(unit ? 0xCA : 0x35);
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}
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switch(speed) {
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case XFER_UDMA_5:
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regU |= unit ? 0x0A : 0x05;
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break;
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case XFER_UDMA_4:
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regU |= unit ? 0x4A : 0x15;
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break;
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case XFER_UDMA_3:
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regU |= unit ? 0x8A : 0x25;
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break;
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case XFER_UDMA_2:
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regU |= unit ? 0x42 : 0x11;
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break;
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case XFER_UDMA_1:
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regU |= unit ? 0x82 : 0x21;
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break;
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case XFER_UDMA_0:
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regU |= unit ? 0xC2 : 0x31;
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break;
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case XFER_MW_DMA_2:
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program_cycle_times(drive, 120, 70);
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break;
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case XFER_MW_DMA_1:
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program_cycle_times(drive, 150, 80);
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break;
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case XFER_MW_DMA_0:
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program_cycle_times(drive, 480, 215);
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break;
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}
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if (speed >= XFER_SW_DMA_0)
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(void) pci_write_config_byte(dev, pciU, regU);
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}
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static int cmd648_dma_end(ide_drive_t *drive)
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{
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ide_hwif_t *hwif = drive->hwif;
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unsigned long base = hwif->dma_base - (hwif->channel * 8);
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int err = ide_dma_end(drive);
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u8 irq_mask = hwif->channel ? MRDMODE_INTR_CH1 :
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MRDMODE_INTR_CH0;
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u8 mrdmode = inb(base + 1);
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/* clear the interrupt bit */
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outb((mrdmode & ~(MRDMODE_INTR_CH0 | MRDMODE_INTR_CH1)) | irq_mask,
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base + 1);
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return err;
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}
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static int cmd64x_dma_end(ide_drive_t *drive)
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{
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ide_hwif_t *hwif = drive->hwif;
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struct pci_dev *dev = to_pci_dev(hwif->dev);
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int irq_reg = hwif->channel ? ARTTIM23 : CFR;
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u8 irq_mask = hwif->channel ? ARTTIM23_INTR_CH1 :
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CFR_INTR_CH0;
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u8 irq_stat = 0;
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int err = ide_dma_end(drive);
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(void) pci_read_config_byte(dev, irq_reg, &irq_stat);
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/* clear the interrupt bit */
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(void) pci_write_config_byte(dev, irq_reg, irq_stat | irq_mask);
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return err;
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}
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static int cmd648_dma_test_irq(ide_drive_t *drive)
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{
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ide_hwif_t *hwif = drive->hwif;
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unsigned long base = hwif->dma_base - (hwif->channel * 8);
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u8 irq_mask = hwif->channel ? MRDMODE_INTR_CH1 :
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MRDMODE_INTR_CH0;
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u8 dma_stat = inb(hwif->dma_base + ATA_DMA_STATUS);
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u8 mrdmode = inb(base + 1);
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#ifdef DEBUG
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printk("%s: dma_stat: 0x%02x mrdmode: 0x%02x irq_mask: 0x%02x\n",
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drive->name, dma_stat, mrdmode, irq_mask);
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#endif
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if (!(mrdmode & irq_mask))
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return 0;
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/* return 1 if INTR asserted */
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if (dma_stat & 4)
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return 1;
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return 0;
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}
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static int cmd64x_dma_test_irq(ide_drive_t *drive)
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{
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ide_hwif_t *hwif = drive->hwif;
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struct pci_dev *dev = to_pci_dev(hwif->dev);
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int irq_reg = hwif->channel ? ARTTIM23 : CFR;
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u8 irq_mask = hwif->channel ? ARTTIM23_INTR_CH1 :
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CFR_INTR_CH0;
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u8 dma_stat = inb(hwif->dma_base + ATA_DMA_STATUS);
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u8 irq_stat = 0;
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(void) pci_read_config_byte(dev, irq_reg, &irq_stat);
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#ifdef DEBUG
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printk("%s: dma_stat: 0x%02x irq_stat: 0x%02x irq_mask: 0x%02x\n",
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drive->name, dma_stat, irq_stat, irq_mask);
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#endif
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if (!(irq_stat & irq_mask))
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return 0;
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/* return 1 if INTR asserted */
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if (dma_stat & 4)
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return 1;
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return 0;
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}
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/*
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* ASUS P55T2P4D with CMD646 chipset revision 0x01 requires the old
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* event order for DMA transfers.
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*/
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static int cmd646_1_dma_end(ide_drive_t *drive)
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{
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ide_hwif_t *hwif = drive->hwif;
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u8 dma_stat = 0, dma_cmd = 0;
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drive->waiting_for_dma = 0;
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/* get DMA status */
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dma_stat = inb(hwif->dma_base + ATA_DMA_STATUS);
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/* read DMA command state */
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dma_cmd = inb(hwif->dma_base + ATA_DMA_CMD);
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/* stop DMA */
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outb(dma_cmd & ~1, hwif->dma_base + ATA_DMA_CMD);
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/* clear the INTR & ERROR bits */
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outb(dma_stat | 6, hwif->dma_base + ATA_DMA_STATUS);
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/* and free any DMA resources */
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ide_destroy_dmatable(drive);
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/* verify good DMA status */
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return (dma_stat & 7) != 4;
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}
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static int init_chipset_cmd64x(struct pci_dev *dev)
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{
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u8 mrdmode = 0;
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/* Set a good latency timer and cache line size value. */
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(void) pci_write_config_byte(dev, PCI_LATENCY_TIMER, 64);
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/* FIXME: pci_set_master() to ensure a good latency timer value */
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/*
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* Enable interrupts, select MEMORY READ LINE for reads.
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*
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* NOTE: although not mentioned in the PCI0646U specs,
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* bits 0-1 are write only and won't be read back as
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* set or not -- PCI0646U2 specs clarify this point.
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*/
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(void) pci_read_config_byte (dev, MRDMODE, &mrdmode);
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mrdmode &= ~0x30;
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(void) pci_write_config_byte(dev, MRDMODE, (mrdmode | 0x02));
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return 0;
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}
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static u8 cmd64x_cable_detect(ide_hwif_t *hwif)
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{
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struct pci_dev *dev = to_pci_dev(hwif->dev);
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u8 bmidecsr = 0, mask = hwif->channel ? 0x02 : 0x01;
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switch (dev->device) {
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case PCI_DEVICE_ID_CMD_648:
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case PCI_DEVICE_ID_CMD_649:
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pci_read_config_byte(dev, BMIDECSR, &bmidecsr);
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return (bmidecsr & mask) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
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default:
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return ATA_CBL_PATA40;
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}
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}
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static const struct ide_port_ops cmd64x_port_ops = {
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.set_pio_mode = cmd64x_set_pio_mode,
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.set_dma_mode = cmd64x_set_dma_mode,
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.cable_detect = cmd64x_cable_detect,
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};
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static const struct ide_dma_ops cmd64x_dma_ops = {
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.dma_host_set = ide_dma_host_set,
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.dma_setup = ide_dma_setup,
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.dma_start = ide_dma_start,
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.dma_end = cmd64x_dma_end,
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.dma_test_irq = cmd64x_dma_test_irq,
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.dma_lost_irq = ide_dma_lost_irq,
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.dma_timer_expiry = ide_dma_sff_timer_expiry,
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.dma_sff_read_status = ide_dma_sff_read_status,
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};
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static const struct ide_dma_ops cmd646_rev1_dma_ops = {
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.dma_host_set = ide_dma_host_set,
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.dma_setup = ide_dma_setup,
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.dma_start = ide_dma_start,
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.dma_end = cmd646_1_dma_end,
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.dma_test_irq = ide_dma_test_irq,
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.dma_lost_irq = ide_dma_lost_irq,
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.dma_timer_expiry = ide_dma_sff_timer_expiry,
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.dma_sff_read_status = ide_dma_sff_read_status,
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};
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static const struct ide_dma_ops cmd648_dma_ops = {
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.dma_host_set = ide_dma_host_set,
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.dma_setup = ide_dma_setup,
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.dma_start = ide_dma_start,
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.dma_end = cmd648_dma_end,
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.dma_test_irq = cmd648_dma_test_irq,
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.dma_lost_irq = ide_dma_lost_irq,
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.dma_timer_expiry = ide_dma_sff_timer_expiry,
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.dma_sff_read_status = ide_dma_sff_read_status,
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};
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static const struct ide_port_info cmd64x_chipsets[] __devinitdata = {
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{ /* 0: CMD643 */
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.name = DRV_NAME,
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.init_chipset = init_chipset_cmd64x,
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.enablebits = {{0x00,0x00,0x00}, {0x51,0x08,0x08}},
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.port_ops = &cmd64x_port_ops,
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.dma_ops = &cmd64x_dma_ops,
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.host_flags = IDE_HFLAG_CLEAR_SIMPLEX |
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IDE_HFLAG_ABUSE_PREFETCH,
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.pio_mask = ATA_PIO5,
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.mwdma_mask = ATA_MWDMA2,
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.udma_mask = 0x00, /* no udma */
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},
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{ /* 1: CMD646 */
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.name = DRV_NAME,
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.init_chipset = init_chipset_cmd64x,
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.enablebits = {{0x51,0x04,0x04}, {0x51,0x08,0x08}},
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.port_ops = &cmd64x_port_ops,
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.dma_ops = &cmd648_dma_ops,
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.host_flags = IDE_HFLAG_SERIALIZE |
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IDE_HFLAG_ABUSE_PREFETCH,
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.pio_mask = ATA_PIO5,
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.mwdma_mask = ATA_MWDMA2,
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.udma_mask = ATA_UDMA2,
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},
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{ /* 2: CMD648 */
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.name = DRV_NAME,
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.init_chipset = init_chipset_cmd64x,
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.enablebits = {{0x51,0x04,0x04}, {0x51,0x08,0x08}},
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.port_ops = &cmd64x_port_ops,
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.dma_ops = &cmd648_dma_ops,
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.host_flags = IDE_HFLAG_ABUSE_PREFETCH,
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.pio_mask = ATA_PIO5,
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.mwdma_mask = ATA_MWDMA2,
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.udma_mask = ATA_UDMA4,
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},
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{ /* 3: CMD649 */
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.name = DRV_NAME,
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.init_chipset = init_chipset_cmd64x,
|
|
.enablebits = {{0x51,0x04,0x04}, {0x51,0x08,0x08}},
|
|
.port_ops = &cmd64x_port_ops,
|
|
.dma_ops = &cmd648_dma_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;
|
|
if (dev->revision == 1)
|
|
d.dma_ops = &cmd646_rev1_dma_ops;
|
|
else
|
|
d.dma_ops = &cmd64x_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");
|
|
MODULE_DESCRIPTION("PCI driver module for CMD64x IDE");
|
|
MODULE_LICENSE("GPL");
|