diff options
Diffstat (limited to 'windhoek/ide/ide-iops.c')
| -rw-r--r-- | windhoek/ide/ide-iops.c | 1217 |
1 files changed, 0 insertions, 1217 deletions
diff --git a/windhoek/ide/ide-iops.c b/windhoek/ide/ide-iops.c deleted file mode 100644 index 21dbe568..00000000 --- a/windhoek/ide/ide-iops.c +++ /dev/null @@ -1,1217 +0,0 @@ -/* - * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org> - * Copyright (C) 2003 Red Hat - * - */ - -#include <linux/module.h> -#include <linux/types.h> -#include <linux/string.h> -#include <linux/kernel.h> -#include <linux/timer.h> -#include <linux/mm.h> -#include <linux/interrupt.h> -#include <linux/major.h> -#include <linux/errno.h> -#include <linux/genhd.h> -#include <linux/blkpg.h> -#include <linux/slab.h> -#include <linux/pci.h> -#include <linux/delay.h> -#include <linux/ide.h> -#include <linux/bitops.h> -#include <linux/nmi.h> - -#include <asm/byteorder.h> -#include <asm/irq.h> -#include <asm/uaccess.h> -#include <asm/io.h> - -#include "local.h" - -#include <ddekit/timer.h> - -/* - * Conventional PIO operations for ATA devices - */ - -static u8 ide_inb (unsigned long port) -{ - return (u8) inb(port); -} - -static void ide_outb (u8 val, unsigned long port) -{ - outb(val, port); -} - -/* - * MMIO operations, typically used for SATA controllers - */ - -static u8 ide_mm_inb (unsigned long port) -{ - return (u8) readb((void __iomem *) port); -} - -static void ide_mm_outb (u8 value, unsigned long port) -{ - writeb(value, (void __iomem *) port); -} - -void SELECT_DRIVE (ide_drive_t *drive) -{ - ide_hwif_t *hwif = drive->hwif; - const struct ide_port_ops *port_ops = hwif->port_ops; - ide_task_t task; - - if (port_ops && port_ops->selectproc) - port_ops->selectproc(drive); - - memset(&task, 0, sizeof(task)); - task.tf_flags = IDE_TFLAG_OUT_DEVICE; - - drive->hwif->tp_ops->tf_load(drive, &task); -} - -void SELECT_MASK(ide_drive_t *drive, int mask) -{ - const struct ide_port_ops *port_ops = drive->hwif->port_ops; - - if (port_ops && port_ops->maskproc) - port_ops->maskproc(drive, mask); -} - -void ide_exec_command(ide_hwif_t *hwif, u8 cmd) -{ - if (hwif->host_flags & IDE_HFLAG_MMIO) - writeb(cmd, (void __iomem *)hwif->io_ports.command_addr); - else - outb(cmd, hwif->io_ports.command_addr); -} -EXPORT_SYMBOL_GPL(ide_exec_command); - -u8 ide_read_status(ide_hwif_t *hwif) -{ - if (hwif->host_flags & IDE_HFLAG_MMIO) - return readb((void __iomem *)hwif->io_ports.status_addr); - else - return inb(hwif->io_ports.status_addr); -} -EXPORT_SYMBOL_GPL(ide_read_status); - -u8 ide_read_altstatus(ide_hwif_t *hwif) -{ - if (hwif->host_flags & IDE_HFLAG_MMIO) - return readb((void __iomem *)hwif->io_ports.ctl_addr); - else - return inb(hwif->io_ports.ctl_addr); -} -EXPORT_SYMBOL_GPL(ide_read_altstatus); - -void ide_set_irq(ide_hwif_t *hwif, int on) -{ - u8 ctl = ATA_DEVCTL_OBS; - - if (on == 4) { /* hack for SRST */ - ctl |= 4; - on &= ~4; - } - - ctl |= on ? 0 : 2; - - if (hwif->host_flags & IDE_HFLAG_MMIO) - writeb(ctl, (void __iomem *)hwif->io_ports.ctl_addr); - else - outb(ctl, hwif->io_ports.ctl_addr); -} -EXPORT_SYMBOL_GPL(ide_set_irq); - -void ide_tf_load(ide_drive_t *drive, ide_task_t *task) -{ - ide_hwif_t *hwif = drive->hwif; - struct ide_io_ports *io_ports = &hwif->io_ports; - struct ide_taskfile *tf = &task->tf; - void (*tf_outb)(u8 addr, unsigned long port); - u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; - u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF; - - if (mmio) - tf_outb = ide_mm_outb; - else - tf_outb = ide_outb; - - if (task->tf_flags & IDE_TFLAG_FLAGGED) - HIHI = 0xFF; - - if (task->tf_flags & IDE_TFLAG_OUT_DATA) { - u16 data = (tf->hob_data << 8) | tf->data; - - if (mmio) - writew(data, (void __iomem *)io_ports->data_addr); - else - outw(data, io_ports->data_addr); - } - - if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE) - tf_outb(tf->hob_feature, io_ports->feature_addr); - if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT) - tf_outb(tf->hob_nsect, io_ports->nsect_addr); - if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL) - tf_outb(tf->hob_lbal, io_ports->lbal_addr); - if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM) - tf_outb(tf->hob_lbam, io_ports->lbam_addr); - if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH) - tf_outb(tf->hob_lbah, io_ports->lbah_addr); - - if (task->tf_flags & IDE_TFLAG_OUT_FEATURE) - tf_outb(tf->feature, io_ports->feature_addr); - if (task->tf_flags & IDE_TFLAG_OUT_NSECT) - tf_outb(tf->nsect, io_ports->nsect_addr); - if (task->tf_flags & IDE_TFLAG_OUT_LBAL) - tf_outb(tf->lbal, io_ports->lbal_addr); - if (task->tf_flags & IDE_TFLAG_OUT_LBAM) - tf_outb(tf->lbam, io_ports->lbam_addr); - if (task->tf_flags & IDE_TFLAG_OUT_LBAH) - tf_outb(tf->lbah, io_ports->lbah_addr); - - if (task->tf_flags & IDE_TFLAG_OUT_DEVICE) - tf_outb((tf->device & HIHI) | drive->select, - io_ports->device_addr); -} -EXPORT_SYMBOL_GPL(ide_tf_load); - -void ide_tf_read(ide_drive_t *drive, ide_task_t *task) -{ - ide_hwif_t *hwif = drive->hwif; - struct ide_io_ports *io_ports = &hwif->io_ports; - struct ide_taskfile *tf = &task->tf; - void (*tf_outb)(u8 addr, unsigned long port); - u8 (*tf_inb)(unsigned long port); - u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; - - if (mmio) { - tf_outb = ide_mm_outb; - tf_inb = ide_mm_inb; - } else { - tf_outb = ide_outb; - tf_inb = ide_inb; - } - - if (task->tf_flags & IDE_TFLAG_IN_DATA) { - u16 data; - - if (mmio) - data = readw((void __iomem *)io_ports->data_addr); - else - data = inw(io_ports->data_addr); - - tf->data = data & 0xff; - tf->hob_data = (data >> 8) & 0xff; - } - - /* be sure we're looking at the low order bits */ - tf_outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr); - - if (task->tf_flags & IDE_TFLAG_IN_FEATURE) - tf->feature = tf_inb(io_ports->feature_addr); - if (task->tf_flags & IDE_TFLAG_IN_NSECT) - tf->nsect = tf_inb(io_ports->nsect_addr); - if (task->tf_flags & IDE_TFLAG_IN_LBAL) - tf->lbal = tf_inb(io_ports->lbal_addr); - if (task->tf_flags & IDE_TFLAG_IN_LBAM) - tf->lbam = tf_inb(io_ports->lbam_addr); - if (task->tf_flags & IDE_TFLAG_IN_LBAH) - tf->lbah = tf_inb(io_ports->lbah_addr); - if (task->tf_flags & IDE_TFLAG_IN_DEVICE) - tf->device = tf_inb(io_ports->device_addr); - - if (task->tf_flags & IDE_TFLAG_LBA48) { - tf_outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr); - - if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE) - tf->hob_feature = tf_inb(io_ports->feature_addr); - if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT) - tf->hob_nsect = tf_inb(io_ports->nsect_addr); - if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL) - tf->hob_lbal = tf_inb(io_ports->lbal_addr); - if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM) - tf->hob_lbam = tf_inb(io_ports->lbam_addr); - if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH) - tf->hob_lbah = tf_inb(io_ports->lbah_addr); - } -} -EXPORT_SYMBOL_GPL(ide_tf_read); - -/* - * Some localbus EIDE interfaces require a special access sequence - * when using 32-bit I/O instructions to transfer data. We call this - * the "vlb_sync" sequence, which consists of three successive reads - * of the sector count register location, with interrupts disabled - * to ensure that the reads all happen together. - */ -static void ata_vlb_sync(unsigned long port) -{ - (void)inb(port); - (void)inb(port); - (void)inb(port); -} - -/* - * This is used for most PIO data transfers *from* the IDE interface - * - * These routines will round up any request for an odd number of bytes, - * so if an odd len is specified, be sure that there's at least one - * extra byte allocated for the buffer. - */ -void ide_input_data(ide_drive_t *drive, struct request *rq, void *buf, - unsigned int len) -{ - DEBUG_MSG("drive %p, rq %p, buf %p, len %d", drive, rq, buf, len); - ide_hwif_t *hwif = drive->hwif; - struct ide_io_ports *io_ports = &hwif->io_ports; - unsigned long data_addr = io_ports->data_addr; - u8 io_32bit = drive->io_32bit; - u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; - - len++; - - DEBUG_MSG("io32bit: %d", io_32bit); - - if (io_32bit) { - unsigned long uninitialized_var(flags); - - if ((io_32bit & 2) && !mmio) { - local_irq_save(flags); - ata_vlb_sync(io_ports->nsect_addr); - } - - if (mmio) - __ide_mm_insl((void __iomem *)data_addr, buf, len / 4); - else - insl(data_addr, buf, len / 4); - - if ((io_32bit & 2) && !mmio) - local_irq_restore(flags); - - if ((len & 3) >= 2) { - if (mmio) - __ide_mm_insw((void __iomem *)data_addr, - (u8 *)buf + (len & ~3), 1); - else - insw(data_addr, (u8 *)buf + (len & ~3), 1); - } - } else { - if (mmio) - __ide_mm_insw((void __iomem *)data_addr, buf, len / 2); - else - insw(data_addr, buf, len / 2); - } -} -EXPORT_SYMBOL_GPL(ide_input_data); - -/* - * This is used for most PIO data transfers *to* the IDE interface - */ -void ide_output_data(ide_drive_t *drive, struct request *rq, void *buf, - unsigned int len) -{ - ide_hwif_t *hwif = drive->hwif; - struct ide_io_ports *io_ports = &hwif->io_ports; - unsigned long data_addr = io_ports->data_addr; - u8 io_32bit = drive->io_32bit; - u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; - - len++; - - if (io_32bit) { - unsigned long uninitialized_var(flags); - - if ((io_32bit & 2) && !mmio) { - local_irq_save(flags); - ata_vlb_sync(io_ports->nsect_addr); - } - - if (mmio) - __ide_mm_outsl((void __iomem *)data_addr, buf, len / 4); - else - outsl(data_addr, buf, len / 4); - - if ((io_32bit & 2) && !mmio) - local_irq_restore(flags); - - if ((len & 3) >= 2) { - if (mmio) - __ide_mm_outsw((void __iomem *)data_addr, - (u8 *)buf + (len & ~3), 1); - else - outsw(data_addr, (u8 *)buf + (len & ~3), 1); - } - } else { - if (mmio) - __ide_mm_outsw((void __iomem *)data_addr, buf, len / 2); - else - outsw(data_addr, buf, len / 2); - } -} -EXPORT_SYMBOL_GPL(ide_output_data); - -u8 ide_read_error(ide_drive_t *drive) -{ - ide_task_t task; - - memset(&task, 0, sizeof(task)); - task.tf_flags = IDE_TFLAG_IN_FEATURE; - - drive->hwif->tp_ops->tf_read(drive, &task); - - return task.tf.error; -} -EXPORT_SYMBOL_GPL(ide_read_error); - -void ide_read_bcount_and_ireason(ide_drive_t *drive, u16 *bcount, u8 *ireason) -{ - ide_task_t task; - - memset(&task, 0, sizeof(task)); - task.tf_flags = IDE_TFLAG_IN_LBAH | IDE_TFLAG_IN_LBAM | - IDE_TFLAG_IN_NSECT; - - drive->hwif->tp_ops->tf_read(drive, &task); - - *bcount = (task.tf.lbah << 8) | task.tf.lbam; - *ireason = task.tf.nsect & 3; -} -EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason); - -const struct ide_tp_ops default_tp_ops = { - .exec_command = ide_exec_command, - .read_status = ide_read_status, - .read_altstatus = ide_read_altstatus, - - .set_irq = ide_set_irq, - - .tf_load = ide_tf_load, - .tf_read = ide_tf_read, - - .input_data = ide_input_data, - .output_data = ide_output_data, -}; - -void ide_fix_driveid(u16 *id) -{ -#ifndef __LITTLE_ENDIAN -# ifdef __BIG_ENDIAN - int i; - - for (i = 0; i < 256; i++) - id[i] = __le16_to_cpu(id[i]); -# else -# error "Please fix <asm/byteorder.h>" -# endif -#endif -} - -/* - * ide_fixstring() cleans up and (optionally) byte-swaps a text string, - * removing leading/trailing blanks and compressing internal blanks. - * It is primarily used to tidy up the model name/number fields as - * returned by the ATA_CMD_ID_ATA[PI] commands. - */ - -void ide_fixstring (u8 *s, const int bytecount, const int byteswap) -{ - u8 *p, *end = &s[bytecount & ~1]; /* bytecount must be even */ - - if (byteswap) { - /* convert from big-endian to host byte order */ - for (p = s ; p != end ; p += 2) - be16_to_cpus((u16 *) p); - } - - /* strip leading blanks */ - p = s; - while (s != end && *s == ' ') - ++s; - /* compress internal blanks and strip trailing blanks */ - while (s != end && *s) { - if (*s++ != ' ' || (s != end && *s && *s != ' ')) - *p++ = *(s-1); - } - /* wipe out trailing garbage */ - while (p != end) - *p++ = '\0'; -} - -EXPORT_SYMBOL(ide_fixstring); - -/* - * Needed for PCI irq sharing - */ -int drive_is_ready (ide_drive_t *drive) -{ - ide_hwif_t *hwif = drive->hwif; - u8 stat = 0; - - if (drive->waiting_for_dma) - return hwif->dma_ops->dma_test_irq(drive); - - /* - * We do a passive status test under shared PCI interrupts on - * cards that truly share the ATA side interrupt, but may also share - * an interrupt with another pci card/device. We make no assumptions - * about possible isa-pnp and pci-pnp issues yet. - */ - if (hwif->io_ports.ctl_addr && - (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0) - stat = hwif->tp_ops->read_altstatus(hwif); - else - /* Note: this may clear a pending IRQ!! */ - stat = hwif->tp_ops->read_status(hwif); - - if (stat & ATA_BUSY) - /* drive busy: definitely not interrupting */ - return 0; - - /* drive ready: *might* be interrupting */ - return 1; -} - -EXPORT_SYMBOL(drive_is_ready); - -/* - * This routine busy-waits for the drive status to be not "busy". - * It then checks the status for all of the "good" bits and none - * of the "bad" bits, and if all is okay it returns 0. All other - * cases return error -- caller may then invoke ide_error(). - * - * This routine should get fixed to not hog the cpu during extra long waits.. - * That could be done by busy-waiting for the first jiffy or two, and then - * setting a timer to wake up at half second intervals thereafter, - * until timeout is achieved, before timing out. - */ -static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout, u8 *rstat) -{ - ide_hwif_t *hwif = drive->hwif; - const struct ide_tp_ops *tp_ops = hwif->tp_ops; - unsigned long flags; - int i; - u8 stat; - - udelay(1); /* spec allows drive 400ns to assert "BUSY" */ - stat = tp_ops->read_status(hwif); - - if (stat & ATA_BUSY) { - local_save_flags(flags); - local_irq_enable_in_hardirq(); - timeout += jiffies; - while ((stat = tp_ops->read_status(hwif)) & ATA_BUSY) { - if (time_after(jiffies, timeout)) { - /* - * One last read after the timeout in case - * heavy interrupt load made us not make any - * progress during the timeout.. - */ - stat = tp_ops->read_status(hwif); - if ((stat & ATA_BUSY) == 0) - break; - - local_irq_restore(flags); - *rstat = stat; - return -EBUSY; - } - } - local_irq_restore(flags); - } - /* - * Allow status to settle, then read it again. - * A few rare drives vastly violate the 400ns spec here, - * so we'll wait up to 10usec for a "good" status - * rather than expensively fail things immediately. - * This fix courtesy of Matthew Faupel & Niccolo Rigacci. - */ - for (i = 0; i < 10; i++) { - udelay(1); - stat = tp_ops->read_status(hwif); - - if (OK_STAT(stat, good, bad)) { - *rstat = stat; - return 0; - } - } - *rstat = stat; - return -EFAULT; -} - -/* - * In case of error returns error value after doing "*startstop = ide_error()". - * The caller should return the updated value of "startstop" in this case, - * "startstop" is unchanged when the function returns 0. - */ -int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout) -{ - int err; - u8 stat; - - /* bail early if we've exceeded max_failures */ - if (drive->max_failures && (drive->failures > drive->max_failures)) { - *startstop = ide_stopped; - return 1; - } - - err = __ide_wait_stat(drive, good, bad, timeout, &stat); - - if (err) { - char *s = (err == -EBUSY) ? "status timeout" : "status error"; - *startstop = ide_error(drive, s, stat); - } - - return err; -} - -EXPORT_SYMBOL(ide_wait_stat); - -/** - * ide_in_drive_list - look for drive in black/white list - * @id: drive identifier - * @table: list to inspect - * - * Look for a drive in the blacklist and the whitelist tables - * Returns 1 if the drive is found in the table. - */ - -int ide_in_drive_list(u16 *id, const struct drive_list_entry *table) -{ - for ( ; table->id_model; table++) - if ((!strcmp(table->id_model, (char *)&id[ATA_ID_PROD])) && - (!table->id_firmware || - strstr((char *)&id[ATA_ID_FW_REV], table->id_firmware))) - return 1; - return 0; -} - -EXPORT_SYMBOL_GPL(ide_in_drive_list); - -/* - * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid. - * We list them here and depend on the device side cable detection for them. - * - * Some optical devices with the buggy firmwares have the same problem. - */ -static const struct drive_list_entry ivb_list[] = { - { "QUANTUM FIREBALLlct10 05" , "A03.0900" }, - { "TSSTcorp CDDVDW SH-S202J" , "SB00" }, - { "TSSTcorp CDDVDW SH-S202J" , "SB01" }, - { "TSSTcorp CDDVDW SH-S202N" , "SB00" }, - { "TSSTcorp CDDVDW SH-S202N" , "SB01" }, - { "TSSTcorp CDDVDW SH-S202H" , "SB00" }, - { "TSSTcorp CDDVDW SH-S202H" , "SB01" }, - { "SAMSUNG SP0822N" , "WA100-10" }, - { NULL , NULL } -}; - -/* - * All hosts that use the 80c ribbon must use! - * The name is derived from upper byte of word 93 and the 80c ribbon. - */ -u8 eighty_ninty_three (ide_drive_t *drive) -{ - ide_hwif_t *hwif = drive->hwif; - u16 *id = drive->id; - int ivb = ide_in_drive_list(id, ivb_list); - - if (hwif->cbl == ATA_CBL_PATA40_SHORT) - return 1; - - if (ivb) - printk(KERN_DEBUG "%s: skipping word 93 validity check\n", - drive->name); - - if (ata_id_is_sata(id) && !ivb) - return 1; - - if (hwif->cbl != ATA_CBL_PATA80 && !ivb) - goto no_80w; - - /* - * FIXME: - * - change master/slave IDENTIFY order - * - force bit13 (80c cable present) check also for !ivb devices - * (unless the slave device is pre-ATA3) - */ - if ((id[ATA_ID_HW_CONFIG] & 0x4000) || - (ivb && (id[ATA_ID_HW_CONFIG] & 0x2000))) - return 1; - -no_80w: - if (drive->dev_flags & IDE_DFLAG_UDMA33_WARNED) - return 0; - - printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, " - "limiting max speed to UDMA33\n", - drive->name, - hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host"); - - drive->dev_flags |= IDE_DFLAG_UDMA33_WARNED; - - return 0; -} - -int ide_driveid_update(ide_drive_t *drive) -{ - ide_hwif_t *hwif = drive->hwif; - const struct ide_tp_ops *tp_ops = hwif->tp_ops; - u16 *id; - unsigned long flags; - u8 stat; - - /* - * Re-read drive->id for possible DMA mode - * change (copied from ide-probe.c) - */ - - SELECT_MASK(drive, 1); - tp_ops->set_irq(hwif, 0); - msleep(50); - tp_ops->exec_command(hwif, ATA_CMD_ID_ATA); - - if (ide_busy_sleep(hwif, WAIT_WORSTCASE, 1)) { - SELECT_MASK(drive, 0); - return 0; - } - - msleep(50); /* wait for IRQ and ATA_DRQ */ - stat = tp_ops->read_status(hwif); - - if (!OK_STAT(stat, ATA_DRQ, BAD_R_STAT)) { - SELECT_MASK(drive, 0); - printk("%s: CHECK for good STATUS\n", drive->name); - return 0; - } - local_irq_save(flags); - SELECT_MASK(drive, 0); - id = kmalloc(SECTOR_SIZE, GFP_ATOMIC); - if (!id) { - local_irq_restore(flags); - return 0; - } - tp_ops->input_data(drive, NULL, id, SECTOR_SIZE); - (void)tp_ops->read_status(hwif); /* clear drive IRQ */ - local_irq_enable(); - local_irq_restore(flags); - ide_fix_driveid(id); - - drive->id[ATA_ID_UDMA_MODES] = id[ATA_ID_UDMA_MODES]; - drive->id[ATA_ID_MWDMA_MODES] = id[ATA_ID_MWDMA_MODES]; - drive->id[ATA_ID_SWDMA_MODES] = id[ATA_ID_SWDMA_MODES]; - /* anything more ? */ - - kfree(id); - - if ((drive->dev_flags & IDE_DFLAG_USING_DMA) && ide_id_dma_bug(drive)) - ide_dma_off(drive); - - return 1; -} - -int ide_config_drive_speed(ide_drive_t *drive, u8 speed) -{ - ide_hwif_t *hwif = drive->hwif; - const struct ide_tp_ops *tp_ops = hwif->tp_ops; - u16 *id = drive->id, i; - int error = 0; - u8 stat; - ide_task_t task; - -#ifdef CONFIG_BLK_DEV_IDEDMA - if (hwif->dma_ops) /* check if host supports DMA */ - hwif->dma_ops->dma_host_set(drive, 0); -#endif - - /* Skip setting PIO flow-control modes on pre-EIDE drives */ - if ((speed & 0xf8) == XFER_PIO_0 && ata_id_has_iordy(drive->id) == 0) - goto skip; - - /* - * Don't use ide_wait_cmd here - it will - * attempt to set_geometry and recalibrate, - * but for some reason these don't work at - * this point (lost interrupt). - */ - /* - * Select the drive, and issue the SETFEATURES command - */ - disable_irq_nosync(hwif->irq); - - /* - * FIXME: we race against the running IRQ here if - * this is called from non IRQ context. If we use - * disable_irq() we hang on the error path. Work - * is needed. - */ - - udelay(1); - SELECT_DRIVE(drive); - SELECT_MASK(drive, 1); - udelay(1); - tp_ops->set_irq(hwif, 0); - - memset(&task, 0, sizeof(task)); - task.tf_flags = IDE_TFLAG_OUT_FEATURE | IDE_TFLAG_OUT_NSECT; - task.tf.feature = SETFEATURES_XFER; - task.tf.nsect = speed; - - tp_ops->tf_load(drive, &task); - - tp_ops->exec_command(hwif, ATA_CMD_SET_FEATURES); - - if (drive->quirk_list == 2) - tp_ops->set_irq(hwif, 1); - - error = __ide_wait_stat(drive, drive->ready_stat, - ATA_BUSY | ATA_DRQ | ATA_ERR, - WAIT_CMD, &stat); - - SELECT_MASK(drive, 0); - - enable_irq(hwif->irq); - - if (error) { - (void) ide_dump_status(drive, "set_drive_speed_status", stat); - return error; - } - - id[ATA_ID_UDMA_MODES] &= ~0xFF00; - id[ATA_ID_MWDMA_MODES] &= ~0x0F00; - id[ATA_ID_SWDMA_MODES] &= ~0x0F00; - - skip: -#ifdef CONFIG_BLK_DEV_IDEDMA - if (speed >= XFER_SW_DMA_0 && (drive->dev_flags & IDE_DFLAG_USING_DMA)) - hwif->dma_ops->dma_host_set(drive, 1); - else if (hwif->dma_ops) /* check if host supports DMA */ - ide_dma_off_quietly(drive); -#endif - - if (speed >= XFER_UDMA_0) { - i = 1 << (speed - XFER_UDMA_0); - id[ATA_ID_UDMA_MODES] |= (i << 8 | i); - } else if (speed >= XFER_MW_DMA_0) { - i = 1 << (speed - XFER_MW_DMA_0); - id[ATA_ID_MWDMA_MODES] |= (i << 8 | i); - } else if (speed >= XFER_SW_DMA_0) { - i = 1 << (speed - XFER_SW_DMA_0); - id[ATA_ID_SWDMA_MODES] |= (i << 8 | i); - } - - if (!drive->init_speed) - drive->init_speed = speed; - drive->current_speed = speed; - return error; -} - -/* - * This should get invoked any time we exit the driver to - * wait for an interrupt response from a drive. handler() points - * at the appropriate code to handle the next interrupt, and a - * timer is started to prevent us from waiting forever in case - * something goes wrong (see the ide_timer_expiry() handler later on). - * - * See also ide_execute_command - */ -static void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, - unsigned int timeout, ide_expiry_t *expiry) -{ - ide_hwif_t *hwif = drive->hwif; - - BUG_ON(hwif->handler); - hwif->handler = handler; - hwif->expiry = expiry; - hwif->timer.expires = jiffies + timeout; - hwif->req_gen_timer = hwif->req_gen; - add_timer(&hwif->timer); -} - -void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, - unsigned int timeout, ide_expiry_t *expiry) -{ - ide_hwif_t *hwif = drive->hwif; - unsigned long flags; - - spin_lock_irqsave(&hwif->lock, flags); - __ide_set_handler(drive, handler, timeout, expiry); - spin_unlock_irqrestore(&hwif->lock, flags); -} - -EXPORT_SYMBOL(ide_set_handler); - -/** - * ide_execute_command - execute an IDE command - * @drive: IDE drive to issue the command against - * @command: command byte to write - * @handler: handler for next phase - * @timeout: timeout for command - * @expiry: handler to run on timeout - * - * Helper function to issue an IDE command. This handles the - * atomicity requirements, command timing and ensures that the - * handler and IRQ setup do not race. All IDE command kick off - * should go via this function or do equivalent locking. - */ - -void ide_execute_command(ide_drive_t *drive, u8 cmd, ide_handler_t *handler, - unsigned timeout, ide_expiry_t *expiry) -{ - ide_hwif_t *hwif = drive->hwif; - unsigned long flags; - - spin_lock_irqsave(&hwif->lock, flags); - __ide_set_handler(drive, handler, timeout, expiry); - hwif->tp_ops->exec_command(hwif, cmd); - /* - * Drive takes 400nS to respond, we must avoid the IRQ being - * serviced before that. - * - * FIXME: we could skip this delay with care on non shared devices - */ - ndelay(400); - spin_unlock_irqrestore(&hwif->lock, flags); -} -EXPORT_SYMBOL(ide_execute_command); - -void ide_execute_pkt_cmd(ide_drive_t *drive) -{ - ide_hwif_t *hwif = drive->hwif; - unsigned long flags; - - spin_lock_irqsave(&hwif->lock, flags); - hwif->tp_ops->exec_command(hwif, ATA_CMD_PACKET); - ndelay(400); - spin_unlock_irqrestore(&hwif->lock, flags); -} -EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd); - -static inline void ide_complete_drive_reset(ide_drive_t *drive, int err) -{ - struct request *rq = drive->hwif->rq; - - if (rq && blk_special_request(rq) && rq->cmd[0] == REQ_DRIVE_RESET) - ide_end_request(drive, err ? err : 1, 0); -} - -/* needed below */ -static ide_startstop_t do_reset1 (ide_drive_t *, int); - -/* - * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms - * during an atapi drive reset operation. If the drive has not yet responded, - * and we have not yet hit our maximum waiting time, then the timer is restarted - * for another 50ms. - */ -static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive) -{ - ide_hwif_t *hwif = drive->hwif; - u8 stat; - - SELECT_DRIVE(drive); - udelay (10); - stat = hwif->tp_ops->read_status(hwif); - - if (OK_STAT(stat, 0, ATA_BUSY)) - printk("%s: ATAPI reset complete\n", drive->name); - else { - if (time_before(jiffies, hwif->poll_timeout)) { - ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL); - /* continue polling */ - return ide_started; - } - /* end of polling */ - hwif->polling = 0; - printk("%s: ATAPI reset timed-out, status=0x%02x\n", - drive->name, stat); - /* do it the old fashioned way */ - return do_reset1(drive, 1); - } - /* done polling */ - hwif->polling = 0; - ide_complete_drive_reset(drive, 0); - return ide_stopped; -} - -static void ide_reset_report_error(ide_hwif_t *hwif, u8 err) -{ - static const char *err_master_vals[] = - { NULL, "passed", "formatter device error", - "sector buffer error", "ECC circuitry error", - "controlling MPU error" }; - - u8 err_master = err & 0x7f; - - printk(KERN_ERR "%s: reset: master: ", hwif->name); - if (err_master && err_master < 6) - printk(KERN_CONT "%s", err_master_vals[err_master]); - else - printk(KERN_CONT "error (0x%02x?)", err); - if (err & 0x80) - printk(KERN_CONT "; slave: failed"); - printk(KERN_CONT "\n"); -} - -/* - * reset_pollfunc() gets invoked to poll the interface for completion every 50ms - * during an ide reset operation. If the drives have not yet responded, - * and we have not yet hit our maximum waiting time, then the timer is restarted - * for another 50ms. - */ -static ide_startstop_t reset_pollfunc (ide_drive_t *drive) -{ - ide_hwif_t *hwif = drive->hwif; - const struct ide_port_ops *port_ops = hwif->port_ops; - u8 tmp; - int err = 0; - - if (port_ops && port_ops->reset_poll) { - err = port_ops->reset_poll(drive); - if (err) { - printk(KERN_ERR "%s: host reset_poll failure for %s.\n", - hwif->name, drive->name); - goto out; - } - } - - tmp = hwif->tp_ops->read_status(hwif); - - if (!OK_STAT(tmp, 0, ATA_BUSY)) { - if (time_before(jiffies, hwif->poll_timeout)) { - ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL); - /* continue polling */ - return ide_started; - } - printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp); - drive->failures++; - err = -EIO; - } else { - tmp = ide_read_error(drive); - - if (tmp == 1) { - printk(KERN_INFO "%s: reset: success\n", hwif->name); - drive->failures = 0; - } else { - ide_reset_report_error(hwif, tmp); - drive->failures++; - err = -EIO; - } - } -out: - hwif->polling = 0; /* done polling */ - ide_complete_drive_reset(drive, err); - return ide_stopped; -} - -static void ide_disk_pre_reset(ide_drive_t *drive) -{ - int legacy = (drive->id[ATA_ID_CFS_ENABLE_2] & 0x0400) ? 0 : 1; - - drive->special.all = 0; - drive->special.b.set_geometry = legacy; - drive->special.b.recalibrate = legacy; - - drive->mult_count = 0; - drive->dev_flags &= ~IDE_DFLAG_PARKED; - - if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0 && - (drive->dev_flags & IDE_DFLAG_USING_DMA) == 0) - drive->mult_req = 0; - - if (drive->mult_req != drive->mult_count) - drive->special.b.set_multmode = 1; -} - -static void pre_reset(ide_drive_t *drive) -{ - const struct ide_port_ops *port_ops = drive->hwif->port_ops; - - if (drive->media == ide_disk) - ide_disk_pre_reset(drive); - else - drive->dev_flags |= IDE_DFLAG_POST_RESET; - - if (drive->dev_flags & IDE_DFLAG_USING_DMA) { - if (drive->crc_count) - ide_check_dma_crc(drive); - else - ide_dma_off(drive); - } - - if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0) { - if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0) { - drive->dev_flags &= ~IDE_DFLAG_UNMASK; - drive->io_32bit = 0; - } - return; - } - - if (port_ops && port_ops->pre_reset) - port_ops->pre_reset(drive); - - if (drive->current_speed != 0xff) - drive->desired_speed = drive->current_speed; - drive->current_speed = 0xff; -} - -/* - * do_reset1() attempts to recover a confused drive by resetting it. - * Unfortunately, resetting a disk drive actually resets all devices on - * the same interface, so it can really be thought of as resetting the - * interface rather than resetting the drive. - * - * ATAPI devices have their own reset mechanism which allows them to be - * individually reset without clobbering other devices on the same interface. - * - * Unfortunately, the IDE interface does not generate an interrupt to let - * us know when the reset operation has finished, so we must poll for this. - * Equally poor, though, is the fact that this may a very long time to complete, - * (up to 30 seconds worstcase). So, instead of busy-waiting here for it, - * we set a timer to poll at 50ms intervals. - */ -static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi) -{ - ide_hwif_t *hwif = drive->hwif; - struct ide_io_ports *io_ports = &hwif->io_ports; - const struct ide_tp_ops *tp_ops = hwif->tp_ops; - const struct ide_port_ops *port_ops; - ide_drive_t *tdrive; - unsigned long flags, timeout; - int i; - DEFINE_WAIT(wait); - - spin_lock_irqsave(&hwif->lock, flags); - - /* We must not reset with running handlers */ - BUG_ON(hwif->handler != NULL); - - /* For an ATAPI device, first try an ATAPI SRST. */ - if (drive->media != ide_disk && !do_not_try_atapi) { - pre_reset(drive); - SELECT_DRIVE(drive); - udelay (20); - tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET); - ndelay(400); - hwif->poll_timeout = jiffies + WAIT_WORSTCASE; - hwif->polling = 1; - __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL); - spin_unlock_irqrestore(&hwif->lock, flags); - return ide_started; - } - - /* We must not disturb devices in the IDE_DFLAG_PARKED state. */ - do { - unsigned long now; - - prepare_to_wait(&ide_park_wq, &wait, TASK_UNINTERRUPTIBLE); - timeout = jiffies; - ide_port_for_each_dev(i, tdrive, hwif) { - if (tdrive->dev_flags & IDE_DFLAG_PRESENT && - tdrive->dev_flags & IDE_DFLAG_PARKED && - time_after(tdrive->sleep, timeout)) - timeout = tdrive->sleep; - } - - now = jiffies; - if (time_before_eq(timeout, now)) - break; - - spin_unlock_irqrestore(&hwif->lock, flags); - timeout = schedule_timeout_uninterruptible(timeout - now); - spin_lock_irqsave(&hwif->lock, flags); - } while (timeout); - finish_wait(&ide_park_wq, &wait); - - /* - * First, reset any device state data we were maintaining - * for any of the drives on this interface. - */ - ide_port_for_each_dev(i, tdrive, hwif) - pre_reset(tdrive); - - if (io_ports->ctl_addr == 0) { - spin_unlock_irqrestore(&hwif->lock, flags); - ide_complete_drive_reset(drive, -ENXIO); - return ide_stopped; - } - - /* - * Note that we also set nIEN while resetting the device, - * to mask unwanted interrupts from the interface during the reset. - * However, due to the design of PC hardware, this will cause an - * immediate interrupt due to the edge transition it produces. - * This single interrupt gives us a "fast poll" for drives that - * recover from reset very quickly, saving us the first 50ms wait time. - * - * TODO: add ->softreset method and stop abusing ->set_irq - */ - /* set SRST and nIEN */ - tp_ops->set_irq(hwif, 4); - /* more than enough time */ - udelay(10); - /* clear SRST, leave nIEN (unless device is on the quirk list) */ - tp_ops->set_irq(hwif, drive->quirk_list == 2); - /* more than enough time */ - udelay(10); - hwif->poll_timeout = jiffies + WAIT_WORSTCASE; - hwif->polling = 1; - __ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL); - - /* - * Some weird controller like resetting themselves to a strange - * state when the disks are reset this way. At least, the Winbond - * 553 documentation says that - */ - port_ops = hwif->port_ops; - if (port_ops && port_ops->resetproc) - port_ops->resetproc(drive); - - spin_unlock_irqrestore(&hwif->lock, flags); - return ide_started; -} - -/* - * ide_do_reset() is the entry point to the drive/interface reset code. - */ - -ide_startstop_t ide_do_reset (ide_drive_t *drive) -{ - return do_reset1(drive, 0); -} - -EXPORT_SYMBOL(ide_do_reset); - -/* - * ide_wait_not_busy() waits for the currently selected device on the hwif - * to report a non-busy status, see comments in ide_probe_port(). - */ -int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout) -{ - u8 stat = 0; - - while(timeout--) { - /* - * Turn this into a schedule() sleep once I'm sure - * about locking issues (2.5 work ?). - */ - mdelay(1); - stat = hwif->tp_ops->read_status(hwif); - if ((stat & ATA_BUSY) == 0) - return 0; - /* - * Assume a value of 0xff means nothing is connected to - * the interface and it doesn't implement the pull-down - * resistor on D7. - */ - if (stat == 0xff) - return -ENODEV; - touch_softlockup_watchdog(); - touch_nmi_watchdog(); - } - return -EBUSY; -} |