diff options
Diffstat (limited to 'drivers/block/cmd646.c')
| -rw-r--r-- | drivers/block/cmd646.c | 289 |
1 files changed, 0 insertions, 289 deletions
diff --git a/drivers/block/cmd646.c b/drivers/block/cmd646.c deleted file mode 100644 index 05cf7c2bf..000000000 --- a/drivers/block/cmd646.c +++ /dev/null @@ -1,289 +0,0 @@ -/* $Id: cmd646.c,v 1.15 1999/07/23 01:48:37 davem Exp $ - * cmd646.c: Enable interrupts at initialization time on Ultra/PCI machines. - * Note, this driver is not used at all on other systems because - * there the "BIOS" has done all of the following already. - * 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@dm.cobaltmicro.com) - */ - -#include <linux/types.h> -#include <linux/pci.h> -#include <linux/delay.h> -#include <linux/hdreg.h> -#include <linux/ide.h> - -#include <asm/io.h> - -static int cmd646_config_drive_for_dma(ide_drive_t *drive) -{ - struct hd_driveid *id = drive->id; - ide_hwif_t *hwif = HWIF(drive); - - /* Even if the drive is not _currently_ in a DMA - * mode, we succeed, and we'll enable it manually - * below in cmd646_dma_onoff. - * - * This is done for disks only, CDROMs and other - * IDE devices are just too quirky. - */ - if((id != NULL) && - ((id->capability & 1) != 0) && - hwif->autodma && - (drive->media == ide_disk)) { - if(id->field_valid & 0x0004) { - if(id->dma_ultra & 0x0007) - return hwif->dmaproc(ide_dma_on, drive); - } - if(id->field_valid & 0x0002) - if((id->dma_mword & 0x0004) || (id->dma_1word & 0x0004)) - return hwif->dmaproc(ide_dma_on, drive); - } - return hwif->dmaproc(ide_dma_off_quietly, drive); -} - -/* This is fun. -DaveM */ -#define IDE_SETXFER SETFEATURES_XFER -#define IDE_SETFEATURE WIN_SETFEATURES -#define IDE_DMA2_ENABLE XFER_MW_DMA_2 -#define IDE_DMA1_ENABLE XFER_MW_DMA_1 -#define IDE_DMA0_ENABLE XFER_MW_DMA_0 -#define IDE_UDMA2_ENABLE XFER_UDMA_2 -#define IDE_UDMA1_ENABLE XFER_UDMA_1 -#define IDE_UDMA0_ENABLE XFER_UDMA_0 - -static __inline__ unsigned char dma2_bits_to_command(unsigned char bits) -{ - if(bits & 0x04) - return IDE_DMA2_ENABLE; - if(bits & 0x02) - return IDE_DMA1_ENABLE; - return IDE_DMA0_ENABLE; -} - -static __inline__ unsigned char udma2_bits_to_command(unsigned char bits) -{ - if(bits & 0x04) - return IDE_UDMA2_ENABLE; - if(bits & 0x02) - return IDE_UDMA1_ENABLE; - return IDE_UDMA0_ENABLE; -} - -static __inline__ int wait_for_ready(ide_drive_t *drive) -{ - int timeout = 100; - byte stat; - - while(--timeout) { - stat = GET_STAT(); - - printk("STAT(%2x) ", stat); - if(!(stat & BUSY_STAT)) { - if((stat & READY_STAT) || (stat & ERR_STAT)) - break; - } - udelay(100); - } - if((stat & ERR_STAT) || timeout <= 0) - return 1; - return 0; -} - -static void cmd646_do_setfeature(ide_drive_t *drive, byte command) -{ -#if 0 - (void) ide_config_drive_speed(drive, command); -#else - unsigned long flags; - byte old_select; - - save_flags(flags); - cli(); - printk("SELECT "); - old_select = IN_BYTE(IDE_SELECT_REG); - OUT_BYTE(drive->select.all, IDE_SELECT_REG); - printk("SETXFER "); - OUT_BYTE(IDE_SETXFER, IDE_FEATURE_REG); - printk("CMND "); - OUT_BYTE(command, IDE_NSECTOR_REG); - printk("wait "); - if(wait_for_ready(drive)) - goto out; - printk("SETFEATURE "); - OUT_BYTE(IDE_SETFEATURE, IDE_COMMAND_REG); - printk("wait "); - (void) wait_for_ready(drive); -out: - OUT_BYTE(old_select, IDE_SELECT_REG); - restore_flags(flags); -#endif -} - -static void cmd646_dma2_enable(ide_drive_t *drive, unsigned long dma_base) -{ - byte unit = (drive->select.b.unit & 0x01); - byte bits = (drive->id->dma_mword | drive->id->dma_1word) & 0x07; - - printk("CMD646: MDMA enable ["); - if((((drive->id->dma_mword & 0x0007) << 8) != - (drive->id->dma_mword & 0x0700))) - cmd646_do_setfeature(drive, dma2_bits_to_command(bits)); - printk("DMA_CAP "); - outb(inb(dma_base+2)|(1<<(5+unit)), dma_base+2); - printk("DONE]\n"); -} - -static void cmd646_udma_enable(ide_drive_t *drive, unsigned long dma_base) -{ - byte unit = (drive->select.b.unit & 0x01); - byte udma_ctrl, bits = drive->id->dma_ultra & 0x07; - byte udma_timing_bits; - - printk("CMD646: UDMA enable ["); - if(((drive->id->dma_ultra & 0x0007) << 8) != - (drive->id->dma_ultra & 0x0700)) - cmd646_do_setfeature(drive, udma2_bits_to_command(bits)); - - /* Enable DMA and UltraDMA */ - printk("DMA_CAP "); - outb(inb(dma_base+2)|(1<<(5+unit)), dma_base+2); - - udma_ctrl = inb(dma_base + 3); - - /* Put this channel into UDMA mode. */ - printk("UDMA_CTRL "); - udma_ctrl |= (1 << unit); - - /* Set UDMA2 usable timings. */ - if(bits & 0x04) - udma_timing_bits = 0x10; - else if(bits & 0x02) - udma_timing_bits = 0x20; - else - udma_timing_bits = 0x30; - udma_ctrl &= ~(0x30 << (unit * 2)); - udma_ctrl |= (udma_timing_bits << (unit * 2)); - - outb(udma_ctrl, dma_base+3); - printk("DONE]\n"); -} - -static int cmd646_dma_onoff(ide_drive_t *drive, int enable) -{ - if(enable) { - ide_hwif_t *hwif = HWIF(drive); - unsigned long dma_base = hwif->dma_base; - struct hd_driveid *id = drive->id; - unsigned int class_rev; - - /* UltraDMA only supported on PCI646U and PCI646U2, - * which correspond to revisions 0x03 and 0x05 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 chipsets. - */ - pci_read_config_dword(hwif->pci_dev, - PCI_CLASS_REVISION, - &class_rev); - class_rev &= 0xff; - if((class_rev == 0x05) && - (id->field_valid & 0x0004) && - (id->dma_ultra & 0x07)) { - /* UltraDMA modes. */ - cmd646_udma_enable(drive, dma_base); - } else { - /* Normal MultiWord DMA modes. */ - cmd646_dma2_enable(drive, dma_base); - } - } - drive->using_dma = enable; - return 0; -} - -static int cmd646_dmaproc(ide_dma_action_t func, ide_drive_t *drive) -{ - if(func == ide_dma_check) - return cmd646_config_drive_for_dma(drive); - else if(func == ide_dma_on || func == ide_dma_off || func == ide_dma_off_quietly) - return cmd646_dma_onoff(drive, (func == ide_dma_on)); - - /* Other cases are done by generic IDE-DMA code. */ - return ide_dmaproc(func, drive); -} - -/* - * ASUS P55T2P4D with CMD646 chipset revision 0x01 requires the old - * event order for DMA transfers. - */ -static int cmd646_1_dmaproc(ide_dma_action_t func, ide_drive_t *drive) -{ - ide_hwif_t *hwif = HWIF(drive); - unsigned long dma_base = hwif->dma_base; - byte dma_stat; - - if (func == ide_dma_end) { - drive->waiting_for_dma = 0; - dma_stat = inb(dma_base+2); /* get DMA status */ - outb(inb(dma_base)&~1, dma_base); /* stop DMA */ - outb(dma_stat|6, dma_base+2); /* clear the INTR & ERROR bits */ - return (dma_stat & 7) != 4; /* verify good DMA status */ - } - - /* Other cases are done by generic IDE-DMA code. */ - return cmd646_dmaproc(func, drive); -} - -void __init ide_init_cmd646 (ide_hwif_t *hwif) -{ - struct pci_dev *dev = hwif->pci_dev; - unsigned char mrdmode; - unsigned int class_rev; - - pci_read_config_dword(hwif->pci_dev, PCI_CLASS_REVISION, &class_rev); - class_rev &= 0xff; - - hwif->chipset = ide_cmd646; - - /* Set a good latency timer and cache line size value. */ - (void) pci_write_config_byte(dev, PCI_LATENCY_TIMER, 64); -#ifdef __sparc_v9__ - (void) pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 0x10); -#endif - - /* Setup interrupts. */ - (void) pci_read_config_byte(dev, 0x71, &mrdmode); - mrdmode &= ~(0x30); - (void) pci_write_config_byte(dev, 0x71, mrdmode); - - /* Use MEMORY READ LINE for reads. - * NOTE: Although not mentioned in the PCI0646U specs, - * these bits are write only and won't be read - * back as set or not. The PCI0646U2 specs clarify - * this point. - */ - (void) pci_write_config_byte(dev, 0x71, mrdmode | 0x02); - - /* Set reasonable active/recovery/address-setup values. */ - (void) pci_write_config_byte(dev, 0x53, 0x40); - (void) pci_write_config_byte(dev, 0x54, 0x3f); - (void) pci_write_config_byte(dev, 0x55, 0x40); - (void) pci_write_config_byte(dev, 0x56, 0x3f); - (void) pci_write_config_byte(dev, 0x57, 0x5c); - (void) pci_write_config_byte(dev, 0x58, 0x3f); - (void) pci_write_config_byte(dev, 0x5b, 0x3f); - - if (hwif->dma_base) { - if (class_rev == 0x01) { - hwif->dmaproc = &cmd646_1_dmaproc; - } else { - hwif->dmaproc = &cmd646_dmaproc; - } - } -} |