* A low-level PATA driver to handle a Compact Flash connected on the
* Mikrotik's RouterBoard 153 board.
*
- * Copyright (C) 2007,2008 Gabor Juhos <juhosg at openwrt.org>
+ * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org>
*
* This file was based on: drivers/ata/pata_ixp4xx_cf.c
* Copyright (C) 2006-07 Tower Technologies
#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/platform_device.h>
-
#include <linux/io.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
+#include <linux/gpio.h>
+#include <linux/platform_device.h>
#include <linux/libata.h>
#include <scsi/scsi_host.h>
-#include <asm/gpio.h>
-
#define DRV_NAME "pata-rb153-cf"
-#define DRV_VERSION "0.4.0"
+#define DRV_VERSION "0.5.0"
#define DRV_DESC "PATA driver for RouterBOARD 153 Compact Flash"
#define RB153_CF_MAXPORTS 1
#define RB153_CF_REG_DATA 0x0C00
struct rb153_cf_info {
- unsigned int irq;
void __iomem *iobase;
unsigned int gpio_line;
int frozen;
+ unsigned int irq;
};
-/* ------------------------------------------------------------------------ */
-
static inline void rb153_pata_finish_io(struct ata_port *ap)
{
struct rb153_cf_info *info = ap->host->private_data;
- ata_altstatus(ap);
+ /* FIXME: Keep previous delay. If this is merely a fence then
+ * ata_sff_sync might be sufficient. */
+ ata_sff_dma_pause(ap);
ndelay(RB153_CF_IO_DELAY);
set_irq_type(info->irq, IRQ_TYPE_LEVEL_HIGH);
}
static void rb153_pata_exec_command(struct ata_port *ap,
- const struct ata_taskfile *tf)
+ const struct ata_taskfile *tf)
{
writeb(tf->command, ap->ioaddr.command_addr);
rb153_pata_finish_io(ap);
}
-static void rb153_pata_data_xfer(struct ata_device *adev, unsigned char *buf,
- unsigned int buflen, int write_data)
+static unsigned int rb153_pata_data_xfer(struct ata_device *adev,
+ unsigned char *buf,
+ unsigned int buflen,
+ int write_data)
{
void __iomem *ioaddr = adev->link->ap->ioaddr.data_addr;
+ unsigned int t;
+ t = buflen;
if (write_data) {
- for (; buflen > 0; buflen--, buf++)
+ for (; t > 0; t--, buf++)
writeb(*buf, ioaddr);
} else {
- for (; buflen > 0; buflen--, buf++)
+ for (; t > 0; t--, buf++)
*buf = readb(ioaddr);
}
rb153_pata_finish_io(adev->link->ap);
+ return buflen;
}
static void rb153_pata_freeze(struct ata_port *ap)
if (gpio_get_value(info->gpio_line)) {
set_irq_type(info->irq, IRQ_TYPE_LEVEL_LOW);
if (!info->frozen)
- ata_interrupt(irq, dev_instance);
+ ata_sff_interrupt(irq, dev_instance);
} else {
set_irq_type(info->irq, IRQ_TYPE_LEVEL_HIGH);
}
return IRQ_HANDLED;
}
-static void rb153_pata_irq_clear(struct ata_port *ap)
-{
-}
-
-static int rb153_pata_port_start(struct ata_port *ap)
-{
- return 0;
-}
-
static struct ata_port_operations rb153_pata_port_ops = {
- .tf_load = ata_tf_load,
- .tf_read = ata_tf_read,
-
- .exec_command = rb153_pata_exec_command,
- .check_status = ata_check_status,
- .dev_select = ata_std_dev_select,
-
- .data_xfer = rb153_pata_data_xfer,
-
- .qc_prep = ata_qc_prep,
- .qc_issue = ata_qc_issue_prot,
-
+ .inherits = &ata_sff_port_ops,
+ .sff_exec_command = rb153_pata_exec_command,
+ .sff_data_xfer = rb153_pata_data_xfer,
.freeze = rb153_pata_freeze,
.thaw = rb153_pata_thaw,
- .error_handler = ata_bmdma_error_handler,
- .cable_detect = ata_cable_40wire,
-
- .irq_handler = rb153_pata_irq_handler,
- .irq_clear = rb153_pata_irq_clear,
- .irq_on = ata_irq_on,
-
- .port_start = rb153_pata_port_start,
};
-/* ------------------------------------------------------------------------ */
-
static struct scsi_host_template rb153_pata_sht = {
- .module = THIS_MODULE,
- .name = DRV_NAME,
- .ioctl = ata_scsi_ioctl,
- .queuecommand = ata_scsi_queuecmd,
- .slave_configure = ata_scsi_slave_config,
- .slave_destroy = ata_scsi_slave_destroy,
- .bios_param = ata_std_bios_param,
- .proc_name = DRV_NAME,
-
- .can_queue = ATA_DEF_QUEUE,
- .this_id = ATA_SHT_THIS_ID,
- .sg_tablesize = LIBATA_MAX_PRD,
- .dma_boundary = ATA_DMA_BOUNDARY,
- .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
- .emulated = ATA_SHT_EMULATED,
- .use_clustering = ATA_SHT_USE_CLUSTERING,
+ ATA_PIO_SHT(DRV_NAME),
};
-/* ------------------------------------------------------------------------ */
-
-static void rb153_pata_setup_port(struct ata_port *ap,
- struct rb153_cf_info *info, unsigned long raw_cmd)
+static void rb153_pata_setup_port(struct ata_host *ah)
{
- ap->ioaddr.cmd_addr = info->iobase + RB153_CF_REG_CMD;
+ struct rb153_cf_info *info = ah->private_data;
+ struct ata_port *ap;
+
+ ap = ah->ports[0];
+
+ ap->ops = &rb153_pata_port_ops;
+ ap->pio_mask = 0x1f; /* PIO4 */
+ ap->flags = ATA_FLAG_NO_LEGACY | ATA_FLAG_MMIO;
+
+ ap->ioaddr.cmd_addr = info->iobase + RB153_CF_REG_CMD;
ap->ioaddr.ctl_addr = info->iobase + RB153_CF_REG_CTRL;
ap->ioaddr.altstatus_addr = info->iobase + RB153_CF_REG_CTRL;
- ata_std_ports(&ap->ioaddr);
-
- ap->ioaddr.data_addr = info->iobase + RB153_CF_REG_DATA;
+ ata_sff_std_ports(&ap->ioaddr);
- ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", raw_cmd,
- raw_cmd + RB153_CF_REG_CTRL);
+ ap->ioaddr.data_addr = info->iobase + RB153_CF_REG_DATA;
}
static __devinit int rb153_pata_driver_probe(struct platform_device *pdev)
int gpio;
struct resource *res;
struct ata_host *ah;
- struct ata_port *ap;
struct rb153_cf_info *info;
int ret;
return ret;
}
- /* allocate host */
ah = ata_host_alloc(&pdev->dev, RB153_CF_MAXPORTS);
if (!ah)
return -ENOMEM;
goto err_free_gpio;
}
- ap = ah->ports[0];
-
- ap->ops = &rb153_pata_port_ops;
- ap->pio_mask = 0x1f; /* PIO4 */
- ap->flags = ATA_FLAG_NO_LEGACY | ATA_FLAG_MMIO;
-
- rb153_pata_setup_port(ap, info, res->start);
+ rb153_pata_setup_port(ah);
ret = ata_host_activate(ah, irq, rb153_pata_irq_handler,
IRQF_TRIGGER_LOW, &rb153_pata_sht);
platform_driver_unregister(&rb153_pata_platform_driver);
}
-MODULE_AUTHOR("Gabor Juhos <juhosg at openwrt.org>");
+MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
MODULE_DESCRIPTION(DRV_DESC);
MODULE_VERSION(DRV_VERSION);
MODULE_LICENSE("GPL v2");
projects / openwrt.git / blobdiff