diff options
Diffstat (limited to 'drivers/ide/ide-iops.c')
| -rw-r--r-- | drivers/ide/ide-iops.c | 536 |
1 files changed, 0 insertions, 536 deletions
diff --git a/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c deleted file mode 100644 index f2be127ee96e..000000000000 --- a/drivers/ide/ide-iops.c +++ /dev/null @@ -1,536 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * 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 <linux/uaccess.h> -#include <asm/io.h> - -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); -} - -u8 ide_read_error(ide_drive_t *drive) -{ - struct ide_taskfile tf; - - drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_ERROR); - - return tf.error; -} -EXPORT_SYMBOL_GPL(ide_read_error); - -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); - -/* - * 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. - */ -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; - bool irqs_threaded = force_irqthreads; - int i; - u8 stat; - - udelay(1); /* spec allows drive 400ns to assert "BUSY" */ - stat = tp_ops->read_status(hwif); - - if (stat & ATA_BUSY) { - if (!irqs_threaded) { - 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; - - if (!irqs_threaded) - local_irq_restore(flags); - *rstat = stat; - return -EBUSY; - } - } - if (!irqs_threaded) - 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. - * Some optical devices with the buggy firmwares have the same problem. - */ -static const struct drive_list_entry ivb_list[] = { - { "QUANTUM FIREBALLlct10 05" , "A03.0900" }, - { "QUANTUM FIREBALLlct20 30" , "APL.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_SATA || 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) - return 1; - - if (ivb) { - const char *model = (char *)&id[ATA_ID_PROD]; - - if (strstr(model, "TSSTcorp CDDVDW SH-S202")) { - /* - * These ATAPI devices always report 80c cable - * so we have to depend on the host in this case. - */ - if (hwif->cbl == ATA_CBL_PATA80) - return 1; - } else { - /* Depend on the device side cable detection. */ - if (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; -} - -static const char *nien_quirk_list[] = { - "QUANTUM FIREBALLlct08 08", - "QUANTUM FIREBALLP KA6.4", - "QUANTUM FIREBALLP KA9.1", - "QUANTUM FIREBALLP KX13.6", - "QUANTUM FIREBALLP KX20.5", - "QUANTUM FIREBALLP KX27.3", - "QUANTUM FIREBALLP LM20.4", - "QUANTUM FIREBALLP LM20.5", - "FUJITSU MHZ2160BH G2", - NULL -}; - -void ide_check_nien_quirk_list(ide_drive_t *drive) -{ - const char **list, *m = (char *)&drive->id[ATA_ID_PROD]; - - for (list = nien_quirk_list; *list != NULL; list++) - if (strstr(m, *list) != NULL) { - drive->dev_flags |= IDE_DFLAG_NIEN_QUIRK; - return; - } -} - -int ide_driveid_update(ide_drive_t *drive) -{ - u16 *id; - int rc; - - id = kmalloc(SECTOR_SIZE, GFP_ATOMIC); - if (id == NULL) - return 0; - - SELECT_MASK(drive, 1); - rc = ide_dev_read_id(drive, ATA_CMD_ID_ATA, id, 1); - SELECT_MASK(drive, 0); - - if (rc) - goto out_err; - - 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]; - drive->id[ATA_ID_CFA_MODES] = id[ATA_ID_CFA_MODES]; - /* anything more ? */ - - kfree(id); - - return 1; -out_err: - if (rc == 2) - printk(KERN_ERR "%s: %s: bad status\n", drive->name, __func__); - kfree(id); - return 0; -} - -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; - struct ide_taskfile tf; - u16 *id = drive->id, i; - int error = 0; - u8 stat; - -#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). - */ - - udelay(1); - tp_ops->dev_select(drive); - SELECT_MASK(drive, 1); - udelay(1); - tp_ops->write_devctl(hwif, ATA_NIEN | ATA_DEVCTL_OBS); - - memset(&tf, 0, sizeof(tf)); - tf.feature = SETFEATURES_XFER; - tf.nsect = speed; - - tp_ops->tf_load(drive, &tf, IDE_VALID_FEATURE | IDE_VALID_NSECT); - - tp_ops->exec_command(hwif, ATA_CMD_SET_FEATURES); - - if (drive->dev_flags & IDE_DFLAG_NIEN_QUIRK) - tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS); - - error = __ide_wait_stat(drive, drive->ready_stat, - ATA_BUSY | ATA_DRQ | ATA_ERR, - WAIT_CMD, &stat); - - SELECT_MASK(drive, 0); - - if (error) { - (void) ide_dump_status(drive, "set_drive_speed_status", stat); - return error; - } - - if (speed >= XFER_SW_DMA_0) { - id[ATA_ID_UDMA_MODES] &= ~0xFF00; - id[ATA_ID_MWDMA_MODES] &= ~0x0700; - id[ATA_ID_SWDMA_MODES] &= ~0x0700; - if (ata_id_is_cfa(id)) - id[ATA_ID_CFA_MODES] &= ~0x0E00; - } else if (ata_id_is_cfa(id)) - id[ATA_ID_CFA_MODES] &= ~0x01C0; - - 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 (ata_id_is_cfa(id) && speed >= XFER_MW_DMA_3) { - i = speed - XFER_MW_DMA_2; - id[ATA_ID_CFA_MODES] |= i << 9; - } 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); - } else if (ata_id_is_cfa(id) && speed >= XFER_PIO_5) { - i = speed - XFER_PIO_4; - id[ATA_ID_CFA_MODES] |= i << 6; - } - - 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 - */ -void __ide_set_handler(ide_drive_t *drive, ide_handler_t *handler, - unsigned int timeout) -{ - ide_hwif_t *hwif = drive->hwif; - - BUG_ON(hwif->handler); - hwif->handler = handler; - 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_hwif_t *hwif = drive->hwif; - unsigned long flags; - - spin_lock_irqsave(&hwif->lock, flags); - __ide_set_handler(drive, handler, timeout); - 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 - * @cmd: command - * @handler: handler for next phase - * @timeout: timeout for command - * - * 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, struct ide_cmd *cmd, - ide_handler_t *handler, unsigned timeout) -{ - ide_hwif_t *hwif = drive->hwif; - unsigned long flags; - - spin_lock_irqsave(&hwif->lock, flags); - if ((cmd->protocol != ATAPI_PROT_DMA && - cmd->protocol != ATAPI_PROT_PIO) || - (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT)) - __ide_set_handler(drive, handler, timeout); - hwif->tp_ops->exec_command(hwif, cmd->tf.command); - /* - * 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); -} - -/* - * 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_nmi_watchdog(); - } - return -EBUSY; -} |