diff options
Diffstat (limited to 'drivers/ide/ide-taskfile.c')
| -rw-r--r-- | drivers/ide/ide-taskfile.c | 884 |
1 files changed, 884 insertions, 0 deletions
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c new file mode 100644 index 000000000000..d04f62ab5de1 --- /dev/null +++ b/drivers/ide/ide-taskfile.c @@ -0,0 +1,884 @@ +/* + * linux/drivers/ide/ide-taskfile.c Version 0.38 March 05, 2003 + * + * Copyright (C) 2000-2002 Michael Cornwell <cornwell@acm.org> + * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org> + * Copyright (C) 2001-2002 Klaus Smolin + * IBM Storage Technology Division + * Copyright (C) 2003-2004 Bartlomiej Zolnierkiewicz + * + * The big the bad and the ugly. + * + * Problems to be fixed because of BH interface or the lack therefore. + * + * Fill me in stupid !!! + * + * HOST: + * General refers to the Controller and Driver "pair". + * DATA HANDLER: + * Under the context of Linux it generally refers to an interrupt handler. + * However, it correctly describes the 'HOST' + * DATA BLOCK: + * The amount of data needed to be transfered as predefined in the + * setup of the device. + * STORAGE ATOMIC: + * The 'DATA BLOCK' associated to the 'DATA HANDLER', and can be as + * small as a single sector or as large as the entire command block + * request. + */ + +#include <linux/config.h> +#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/hdreg.h> +#include <linux/ide.h> +#include <linux/bitops.h> + +#include <asm/byteorder.h> +#include <asm/irq.h> +#include <asm/uaccess.h> +#include <asm/io.h> + +#define DEBUG_TASKFILE 0 /* unset when fixed */ + +static void ata_bswap_data (void *buffer, int wcount) +{ + u16 *p = buffer; + + while (wcount--) { + *p = *p << 8 | *p >> 8; p++; + *p = *p << 8 | *p >> 8; p++; + } +} + +static void taskfile_input_data(ide_drive_t *drive, void *buffer, u32 wcount) +{ + HWIF(drive)->ata_input_data(drive, buffer, wcount); + if (drive->bswap) + ata_bswap_data(buffer, wcount); +} + +static void taskfile_output_data(ide_drive_t *drive, void *buffer, u32 wcount) +{ + if (drive->bswap) { + ata_bswap_data(buffer, wcount); + HWIF(drive)->ata_output_data(drive, buffer, wcount); + ata_bswap_data(buffer, wcount); + } else { + HWIF(drive)->ata_output_data(drive, buffer, wcount); + } +} + +int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf) +{ + ide_task_t args; + memset(&args, 0, sizeof(ide_task_t)); + args.tfRegister[IDE_NSECTOR_OFFSET] = 0x01; + if (drive->media == ide_disk) + args.tfRegister[IDE_COMMAND_OFFSET] = WIN_IDENTIFY; + else + args.tfRegister[IDE_COMMAND_OFFSET] = WIN_PIDENTIFY; + args.command_type = IDE_DRIVE_TASK_IN; + args.data_phase = TASKFILE_IN; + args.handler = &task_in_intr; + return ide_raw_taskfile(drive, &args, buf); +} + +ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task) +{ + ide_hwif_t *hwif = HWIF(drive); + task_struct_t *taskfile = (task_struct_t *) task->tfRegister; + hob_struct_t *hobfile = (hob_struct_t *) task->hobRegister; + u8 HIHI = (drive->addressing == 1) ? 0xE0 : 0xEF; + + /* ALL Command Block Executions SHALL clear nIEN, unless otherwise */ + if (IDE_CONTROL_REG) { + /* clear nIEN */ + hwif->OUTB(drive->ctl, IDE_CONTROL_REG); + } + SELECT_MASK(drive, 0); + + if (drive->addressing == 1) { + hwif->OUTB(hobfile->feature, IDE_FEATURE_REG); + hwif->OUTB(hobfile->sector_count, IDE_NSECTOR_REG); + hwif->OUTB(hobfile->sector_number, IDE_SECTOR_REG); + hwif->OUTB(hobfile->low_cylinder, IDE_LCYL_REG); + hwif->OUTB(hobfile->high_cylinder, IDE_HCYL_REG); + } + + hwif->OUTB(taskfile->feature, IDE_FEATURE_REG); + hwif->OUTB(taskfile->sector_count, IDE_NSECTOR_REG); + hwif->OUTB(taskfile->sector_number, IDE_SECTOR_REG); + hwif->OUTB(taskfile->low_cylinder, IDE_LCYL_REG); + hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG); + + hwif->OUTB((taskfile->device_head & HIHI) | drive->select.all, IDE_SELECT_REG); + + if (task->handler != NULL) { + if (task->prehandler != NULL) { + hwif->OUTBSYNC(drive, taskfile->command, IDE_COMMAND_REG); + ndelay(400); /* FIXME */ + return task->prehandler(drive, task->rq); + } + ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL); + return ide_started; + } + + if (!drive->using_dma) + return ide_stopped; + + switch (taskfile->command) { + case WIN_WRITEDMA_ONCE: + case WIN_WRITEDMA: + case WIN_WRITEDMA_EXT: + case WIN_READDMA_ONCE: + case WIN_READDMA: + case WIN_READDMA_EXT: + case WIN_IDENTIFY_DMA: + if (!hwif->dma_setup(drive)) { + hwif->dma_exec_cmd(drive, taskfile->command); + hwif->dma_start(drive); + return ide_started; + } + break; + default: + if (task->handler == NULL) + return ide_stopped; + } + + return ide_stopped; +} + +EXPORT_SYMBOL(do_rw_taskfile); + +/* + * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd. + */ +ide_startstop_t set_multmode_intr (ide_drive_t *drive) +{ + ide_hwif_t *hwif = HWIF(drive); + u8 stat; + + if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) { + drive->mult_count = drive->mult_req; + } else { + drive->mult_req = drive->mult_count = 0; + drive->special.b.recalibrate = 1; + (void) ide_dump_status(drive, "set_multmode", stat); + } + return ide_stopped; +} + +/* + * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd. + */ +ide_startstop_t set_geometry_intr (ide_drive_t *drive) +{ + ide_hwif_t *hwif = HWIF(drive); + int retries = 5; + u8 stat; + + while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--) + udelay(10); + + if (OK_STAT(stat, READY_STAT, BAD_STAT)) + return ide_stopped; + + if (stat & (ERR_STAT|DRQ_STAT)) + return ide_error(drive, "set_geometry_intr", stat); + + if (HWGROUP(drive)->handler != NULL) + BUG(); + ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL); + return ide_started; +} + +/* + * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd. + */ +ide_startstop_t recal_intr (ide_drive_t *drive) +{ + ide_hwif_t *hwif = HWIF(drive); + u8 stat; + + if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT)) + return ide_error(drive, "recal_intr", stat); + return ide_stopped; +} + +/* + * Handler for commands without a data phase + */ +ide_startstop_t task_no_data_intr (ide_drive_t *drive) +{ + ide_task_t *args = HWGROUP(drive)->rq->special; + ide_hwif_t *hwif = HWIF(drive); + u8 stat; + + local_irq_enable(); + if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) { + return ide_error(drive, "task_no_data_intr", stat); + /* calls ide_end_drive_cmd */ + } + if (args) + ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG)); + + return ide_stopped; +} + +EXPORT_SYMBOL(task_no_data_intr); + +static u8 wait_drive_not_busy(ide_drive_t *drive) +{ + ide_hwif_t *hwif = HWIF(drive); + int retries = 100; + u8 stat; + + /* + * Last sector was transfered, wait until drive is ready. + * This can take up to 10 usec, but we will wait max 1 ms + * (drive_cmd_intr() waits that long). + */ + while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--) + udelay(10); + + if (!retries) + printk(KERN_ERR "%s: drive still BUSY!\n", drive->name); + + return stat; +} + +static void ide_pio_sector(ide_drive_t *drive, unsigned int write) +{ + ide_hwif_t *hwif = drive->hwif; + struct scatterlist *sg = hwif->sg_table; + struct page *page; +#ifdef CONFIG_HIGHMEM + unsigned long flags; +#endif + unsigned int offset; + u8 *buf; + + page = sg[hwif->cursg].page; + offset = sg[hwif->cursg].offset + hwif->cursg_ofs * SECTOR_SIZE; + + /* get the current page and offset */ + page = nth_page(page, (offset >> PAGE_SHIFT)); + offset %= PAGE_SIZE; + +#ifdef CONFIG_HIGHMEM + local_irq_save(flags); +#endif + buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset; + + hwif->nleft--; + hwif->cursg_ofs++; + + if ((hwif->cursg_ofs * SECTOR_SIZE) == sg[hwif->cursg].length) { + hwif->cursg++; + hwif->cursg_ofs = 0; + } + + /* do the actual data transfer */ + if (write) + taskfile_output_data(drive, buf, SECTOR_WORDS); + else + taskfile_input_data(drive, buf, SECTOR_WORDS); + + kunmap_atomic(buf, KM_BIO_SRC_IRQ); +#ifdef CONFIG_HIGHMEM + local_irq_restore(flags); +#endif +} + +static void ide_pio_multi(ide_drive_t *drive, unsigned int write) +{ + unsigned int nsect; + + nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count); + while (nsect--) + ide_pio_sector(drive, write); +} + +static inline void ide_pio_datablock(ide_drive_t *drive, struct request *rq, + unsigned int write) +{ + if (rq->bio) /* fs request */ + rq->errors = 0; + + switch (drive->hwif->data_phase) { + case TASKFILE_MULTI_IN: + case TASKFILE_MULTI_OUT: + ide_pio_multi(drive, write); + break; + default: + ide_pio_sector(drive, write); + break; + } +} + +static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq, + const char *s, u8 stat) +{ + if (rq->bio) { + ide_hwif_t *hwif = drive->hwif; + int sectors = hwif->nsect - hwif->nleft; + + switch (hwif->data_phase) { + case TASKFILE_IN: + if (hwif->nleft) + break; + /* fall through */ + case TASKFILE_OUT: + sectors--; + break; + case TASKFILE_MULTI_IN: + if (hwif->nleft) + break; + /* fall through */ + case TASKFILE_MULTI_OUT: + sectors -= drive->mult_count; + default: + break; + } + + if (sectors > 0) { + ide_driver_t *drv; + + drv = *(ide_driver_t **)rq->rq_disk->private_data; + drv->end_request(drive, 1, sectors); + } + } + return ide_error(drive, s, stat); +} + +static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat) +{ + if (rq->flags & REQ_DRIVE_TASKFILE) { + ide_task_t *task = rq->special; + + if (task->tf_out_flags.all) { + u8 err = drive->hwif->INB(IDE_ERROR_REG); + ide_end_drive_cmd(drive, stat, err); + return; + } + } + + ide_end_request(drive, 1, rq->hard_nr_sectors); +} + +/* + * Handler for command with PIO data-in phase (Read/Read Multiple). + */ +ide_startstop_t task_in_intr (ide_drive_t *drive) +{ + ide_hwif_t *hwif = drive->hwif; + struct request *rq = HWGROUP(drive)->rq; + u8 stat = hwif->INB(IDE_STATUS_REG); + + /* new way for dealing with premature shared PCI interrupts */ + if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) { + if (stat & (ERR_STAT | DRQ_STAT)) + return task_error(drive, rq, __FUNCTION__, stat); + /* No data yet, so wait for another IRQ. */ + ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL); + return ide_started; + } + + ide_pio_datablock(drive, rq, 0); + + /* If it was the last datablock check status and finish transfer. */ + if (!hwif->nleft) { + stat = wait_drive_not_busy(drive); + if (!OK_STAT(stat, 0, BAD_R_STAT)) + return task_error(drive, rq, __FUNCTION__, stat); + task_end_request(drive, rq, stat); + return ide_stopped; + } + + /* Still data left to transfer. */ + ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL); + + return ide_started; +} +EXPORT_SYMBOL(task_in_intr); + +/* + * Handler for command with PIO data-out phase (Write/Write Multiple). + */ +static ide_startstop_t task_out_intr (ide_drive_t *drive) +{ + ide_hwif_t *hwif = drive->hwif; + struct request *rq = HWGROUP(drive)->rq; + u8 stat = hwif->INB(IDE_STATUS_REG); + + if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat)) + return task_error(drive, rq, __FUNCTION__, stat); + + /* Deal with unexpected ATA data phase. */ + if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft) + return task_error(drive, rq, __FUNCTION__, stat); + + if (!hwif->nleft) { + task_end_request(drive, rq, stat); + return ide_stopped; + } + + /* Still data left to transfer. */ + ide_pio_datablock(drive, rq, 1); + ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL); + + return ide_started; +} + +ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq) +{ + ide_startstop_t startstop; + + if (ide_wait_stat(&startstop, drive, DATA_READY, + drive->bad_wstat, WAIT_DRQ)) { + printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n", + drive->name, + drive->hwif->data_phase ? "MULT" : "", + drive->addressing ? "_EXT" : ""); + return startstop; + } + + if (!drive->unmask) + local_irq_disable(); + + ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL); + ide_pio_datablock(drive, rq, 1); + + return ide_started; +} +EXPORT_SYMBOL(pre_task_out_intr); + +static int ide_diag_taskfile(ide_drive_t *drive, ide_task_t *args, unsigned long data_size, u8 *buf) +{ + struct request rq; + + memset(&rq, 0, sizeof(rq)); + rq.flags = REQ_DRIVE_TASKFILE; + rq.buffer = buf; + + /* + * (ks) We transfer currently only whole sectors. + * This is suffient for now. But, it would be great, + * if we would find a solution to transfer any size. + * To support special commands like READ LONG. + */ + if (args->command_type != IDE_DRIVE_TASK_NO_DATA) { + if (data_size == 0) + rq.nr_sectors = (args->hobRegister[IDE_NSECTOR_OFFSET] << 8) | args->tfRegister[IDE_NSECTOR_OFFSET]; + else + rq.nr_sectors = data_size / SECTOR_SIZE; + + if (!rq.nr_sectors) { + printk(KERN_ERR "%s: in/out command without data\n", + drive->name); + return -EFAULT; + } + + rq.hard_nr_sectors = rq.nr_sectors; + rq.hard_cur_sectors = rq.current_nr_sectors = rq.nr_sectors; + + if (args->command_type == IDE_DRIVE_TASK_RAW_WRITE) + rq.flags |= REQ_RW; + } + + rq.special = args; + return ide_do_drive_cmd(drive, &rq, ide_wait); +} + +int ide_raw_taskfile (ide_drive_t *drive, ide_task_t *args, u8 *buf) +{ + return ide_diag_taskfile(drive, args, 0, buf); +} + +EXPORT_SYMBOL(ide_raw_taskfile); + +int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg) +{ + ide_task_request_t *req_task; + ide_task_t args; + u8 *outbuf = NULL; + u8 *inbuf = NULL; + task_ioreg_t *argsptr = args.tfRegister; + task_ioreg_t *hobsptr = args.hobRegister; + int err = 0; + int tasksize = sizeof(struct ide_task_request_s); + int taskin = 0; + int taskout = 0; + u8 io_32bit = drive->io_32bit; + char __user *buf = (char __user *)arg; + +// printk("IDE Taskfile ...\n"); + + req_task = kmalloc(tasksize, GFP_KERNEL); + if (req_task == NULL) return -ENOMEM; + memset(req_task, 0, tasksize); + if (copy_from_user(req_task, buf, tasksize)) { + kfree(req_task); + return -EFAULT; + } + + taskout = (int) req_task->out_size; + taskin = (int) req_task->in_size; + + if (taskout) { + int outtotal = tasksize; + outbuf = kmalloc(taskout, GFP_KERNEL); + if (outbuf == NULL) { + err = -ENOMEM; + goto abort; + } + memset(outbuf, 0, taskout); + if (copy_from_user(outbuf, buf + outtotal, taskout)) { + err = -EFAULT; + goto abort; + } + } + + if (taskin) { + int intotal = tasksize + taskout; + inbuf = kmalloc(taskin, GFP_KERNEL); + if (inbuf == NULL) { + err = -ENOMEM; + goto abort; + } + memset(inbuf, 0, taskin); + if (copy_from_user(inbuf, buf + intotal, taskin)) { + err = -EFAULT; + goto abort; + } + } + + memset(&args, 0, sizeof(ide_task_t)); + memcpy(argsptr, req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE); + memcpy(hobsptr, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE); + + args.tf_in_flags = req_task->in_flags; + args.tf_out_flags = req_task->out_flags; + args.data_phase = req_task->data_phase; + args.command_type = req_task->req_cmd; + + drive->io_32bit = 0; + switch(req_task->data_phase) { + case TASKFILE_OUT_DMAQ: + case TASKFILE_OUT_DMA: + err = ide_diag_taskfile(drive, &args, taskout, outbuf); + break; + case TASKFILE_IN_DMAQ: + case TASKFILE_IN_DMA: + err = ide_diag_taskfile(drive, &args, taskin, inbuf); + break; + case TASKFILE_MULTI_OUT: + if (!drive->mult_count) { + /* (hs): give up if multcount is not set */ + printk(KERN_ERR "%s: %s Multimode Write " \ + "multcount is not set\n", + drive->name, __FUNCTION__); + err = -EPERM; + goto abort; + } + /* fall through */ + case TASKFILE_OUT: + args.prehandler = &pre_task_out_intr; + args.handler = &task_out_intr; + err = ide_diag_taskfile(drive, &args, taskout, outbuf); + break; + case TASKFILE_MULTI_IN: + if (!drive->mult_count) { + /* (hs): give up if multcount is not set */ + printk(KERN_ERR "%s: %s Multimode Read failure " \ + "multcount is not set\n", + drive->name, __FUNCTION__); + err = -EPERM; + goto abort; + } + /* fall through */ + case TASKFILE_IN: + args.handler = &task_in_intr; + err = ide_diag_taskfile(drive, &args, taskin, inbuf); + break; + case TASKFILE_NO_DATA: + args.handler = &task_no_data_intr; + err = ide_diag_taskfile(drive, &args, 0, NULL); + break; + default: + err = -EFAULT; + goto abort; + } + + memcpy(req_task->io_ports, &(args.tfRegister), HDIO_DRIVE_TASK_HDR_SIZE); + memcpy(req_task->hob_ports, &(args.hobRegister), HDIO_DRIVE_HOB_HDR_SIZE); + req_task->in_flags = args.tf_in_flags; + req_task->out_flags = args.tf_out_flags; + + if (copy_to_user(buf, req_task, tasksize)) { + err = -EFAULT; + goto abort; + } + if (taskout) { + int outtotal = tasksize; + if (copy_to_user(buf + outtotal, outbuf, taskout)) { + err = -EFAULT; + goto abort; + } + } + if (taskin) { + int intotal = tasksize + taskout; + if (copy_to_user(buf + intotal, inbuf, taskin)) { + err = -EFAULT; + goto abort; + } + } +abort: + kfree(req_task); + if (outbuf != NULL) + kfree(outbuf); + if (inbuf != NULL) + kfree(inbuf); + +// printk("IDE Taskfile ioctl ended. rc = %i\n", err); + + drive->io_32bit = io_32bit; + + return err; +} + +int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf) +{ + struct request rq; + u8 buffer[4]; + + if (!buf) + buf = buffer; + memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors); + ide_init_drive_cmd(&rq); + rq.buffer = buf; + *buf++ = cmd; + *buf++ = nsect; + *buf++ = feature; + *buf++ = sectors; + return ide_do_drive_cmd(drive, &rq, ide_wait); +} + +/* + * FIXME : this needs to map into at taskfile. <andre@linux-ide.org> + */ +int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg) +{ + int err = 0; + u8 args[4], *argbuf = args; + u8 xfer_rate = 0; + int argsize = 4; + ide_task_t tfargs; + + if (NULL == (void *) arg) { + struct request rq; + ide_init_drive_cmd(&rq); + return ide_do_drive_cmd(drive, &rq, ide_wait); + } + + if (copy_from_user(args, (void __user *)arg, 4)) + return -EFAULT; + + memset(&tfargs, 0, sizeof(ide_task_t)); + tfargs.tfRegister[IDE_FEATURE_OFFSET] = args[2]; + tfargs.tfRegister[IDE_NSECTOR_OFFSET] = args[3]; + tfargs.tfRegister[IDE_SECTOR_OFFSET] = args[1]; + tfargs.tfRegister[IDE_LCYL_OFFSET] = 0x00; + tfargs.tfRegister[IDE_HCYL_OFFSET] = 0x00; + tfargs.tfRegister[IDE_SELECT_OFFSET] = 0x00; + tfargs.tfRegister[IDE_COMMAND_OFFSET] = args[0]; + + if (args[3]) { + argsize = 4 + (SECTOR_WORDS * 4 * args[3]); + argbuf = kmalloc(argsize, GFP_KERNEL); + if (argbuf == NULL) + return -ENOMEM; + memcpy(argbuf, args, 4); + } + if (set_transfer(drive, &tfargs)) { + xfer_rate = args[1]; + if (ide_ata66_check(drive, &tfargs)) + goto abort; + } + + err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf); + + if (!err && xfer_rate) { + /* active-retuning-calls future */ + ide_set_xfer_rate(drive, xfer_rate); + ide_driveid_update(drive); + } +abort: + if (copy_to_user((void __user *)arg, argbuf, argsize)) + err = -EFAULT; + if (argsize > 4) + kfree(argbuf); + return err; +} + +static int ide_wait_cmd_task(ide_drive_t *drive, u8 *buf) +{ + struct request rq; + + ide_init_drive_cmd(&rq); + rq.flags = REQ_DRIVE_TASK; + rq.buffer = buf; + return ide_do_drive_cmd(drive, &rq, ide_wait); +} + +/* + * FIXME : this needs to map into at taskfile. <andre@linux-ide.org> + */ +int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg) +{ + void __user *p = (void __user *)arg; + int err = 0; + u8 args[7], *argbuf = args; + int argsize = 7; + + if (copy_from_user(args, p, 7)) + return -EFAULT; + err = ide_wait_cmd_task(drive, argbuf); + if (copy_to_user(p, argbuf, argsize)) + err = -EFAULT; + return err; +} + +/* + * NOTICE: This is additions from IBM to provide a discrete interface, + * for selective taskregister access operations. Nice JOB Klaus!!! + * Glad to be able to work and co-develop this with you and IBM. + */ +ide_startstop_t flagged_taskfile (ide_drive_t *drive, ide_task_t *task) +{ + ide_hwif_t *hwif = HWIF(drive); + task_struct_t *taskfile = (task_struct_t *) task->tfRegister; + hob_struct_t *hobfile = (hob_struct_t *) task->hobRegister; +#if DEBUG_TASKFILE + u8 status; +#endif + + if (task->data_phase == TASKFILE_MULTI_IN || + task->data_phase == TASKFILE_MULTI_OUT) { + if (!drive->mult_count) { + printk(KERN_ERR "%s: multimode not set!\n", drive->name); + return ide_stopped; + } + } + + /* + * (ks) Check taskfile in/out flags. + * If set, then execute as it is defined. + * If not set, then define default settings. + * The default values are: + * write and read all taskfile registers (except data) + * write and read the hob registers (sector,nsector,lcyl,hcyl) + */ + if (task->tf_out_flags.all == 0) { + task->tf_out_flags.all = IDE_TASKFILE_STD_OUT_FLAGS; + if (drive->addressing == 1) + task->tf_out_flags.all |= (IDE_HOB_STD_OUT_FLAGS << 8); + } + + if (task->tf_in_flags.all == 0) { + task->tf_in_flags.all = IDE_TASKFILE_STD_IN_FLAGS; + if (drive->addressing == 1) + task->tf_in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8); + } + + /* ALL Command Block Executions SHALL clear nIEN, unless otherwise */ + if (IDE_CONTROL_REG) + /* clear nIEN */ + hwif->OUTB(drive->ctl, IDE_CONTROL_REG); + SELECT_MASK(drive, 0); + +#if DEBUG_TASKFILE + status = hwif->INB(IDE_STATUS_REG); + if (status & 0x80) { + printk("flagged_taskfile -> Bad status. Status = %02x. wait 100 usec ...\n", status); + udelay(100); + status = hwif->INB(IDE_STATUS_REG); + printk("flagged_taskfile -> Status = %02x\n", status); + } +#endif + + if (task->tf_out_flags.b.data) { + u16 data = taskfile->data + (hobfile->data << 8); + hwif->OUTW(data, IDE_DATA_REG); + } + + /* (ks) send hob registers first */ + if (task->tf_out_flags.b.nsector_hob) + hwif->OUTB(hobfile->sector_count, IDE_NSECTOR_REG); + if (task->tf_out_flags.b.sector_hob) + hwif->OUTB(hobfile->sector_number, IDE_SECTOR_REG); + if (task->tf_out_flags.b.lcyl_hob) + hwif->OUTB(hobfile->low_cylinder, IDE_LCYL_REG); + if (task->tf_out_flags.b.hcyl_hob) + hwif->OUTB(hobfile->high_cylinder, IDE_HCYL_REG); + + /* (ks) Send now the standard registers */ + if (task->tf_out_flags.b.error_feature) + hwif->OUTB(taskfile->feature, IDE_FEATURE_REG); + /* refers to number of sectors to transfer */ + if (task->tf_out_flags.b.nsector) + hwif->OUTB(taskfile->sector_count, IDE_NSECTOR_REG); + /* refers to sector offset or start sector */ + if (task->tf_out_flags.b.sector) + hwif->OUTB(taskfile->sector_number, IDE_SECTOR_REG); + if (task->tf_out_flags.b.lcyl) + hwif->OUTB(taskfile->low_cylinder, IDE_LCYL_REG); + if (task->tf_out_flags.b.hcyl) + hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG); + + /* + * (ks) In the flagged taskfile approch, we will use all specified + * registers and the register value will not be changed, except the + * select bit (master/slave) in the drive_head register. We must make + * sure that the desired drive is selected. + */ + hwif->OUTB(taskfile->device_head | drive->select.all, IDE_SELECT_REG); + switch(task->data_phase) { + + case TASKFILE_OUT_DMAQ: + case TASKFILE_OUT_DMA: + case TASKFILE_IN_DMAQ: + case TASKFILE_IN_DMA: + hwif->dma_setup(drive); + hwif->dma_exec_cmd(drive, taskfile->command); + hwif->dma_start(drive); + break; + + default: + if (task->handler == NULL) + return ide_stopped; + + /* Issue the command */ + if (task->prehandler) { + hwif->OUTBSYNC(drive, taskfile->command, IDE_COMMAND_REG); + ndelay(400); /* FIXME */ + return task->prehandler(drive, task->rq); + } + ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL); + } + + return ide_started; +} |