* A low-level PATA driver to handle a Compact Flash connected on the
* Mikrotik's RouterBoard 153 board.
*
- * Copyright (C) 2007 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
* their RouterBoard 1xx and 5xx series devices. The original Mikrotik code
* seems not to have a license.
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
*
*/
#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 "0.1"
+#define DRV_VERSION "0.5.0"
#define DRV_DESC "PATA driver for RouterBOARD 153 Compact Flash"
#define RB153_CF_MAXPORTS 1
struct rb153_cf_info {
void __iomem *iobase;
unsigned int gpio_line;
- int error;
+ int frozen;
+ unsigned int irq;
};
-/* ------------------------------------------------------------------------ */
-
static inline void rb153_pata_finish_io(struct ata_port *ap)
{
- struct ata_host *ah = ap->host;
+ 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(ah->irq, IRQ_TYPE_LEVEL_HIGH);
+ 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)
{
- struct ata_port *ap = adev->ap;
- unsigned int i;
+ void __iomem *ioaddr = adev->link->ap->ioaddr.data_addr;
+ unsigned int t;
+ t = buflen;
if (write_data) {
- for (i = 0; i < buflen; i++)
- writeb(buf[i], ap->ioaddr.data_addr);
+ for (; t > 0; t--, buf++)
+ writeb(*buf, ioaddr);
} else {
- for (; buflen > 0; buflen--)
- buf[i] = readb(ap->ioaddr.data_addr);
+ for (; t > 0; t--, buf++)
+ *buf = readb(ioaddr);
}
- rb153_pata_finish_io(ap);
+ rb153_pata_finish_io(adev->link->ap);
+ return buflen;
+}
+
+static void rb153_pata_freeze(struct ata_port *ap)
+{
+ struct rb153_cf_info *info = ap->host->private_data;
+
+ info->frozen = 1;
}
static void rb153_pata_thaw(struct ata_port *ap)
{
struct rb153_cf_info *info = ap->host->private_data;
- info->error = 0;
+ info->frozen = 0;
}
static irqreturn_t rb153_pata_irq_handler(int irq, void *dev_instance)
struct rb153_cf_info *info = ah->private_data;
if (gpio_get_value(info->gpio_line)) {
- set_irq_type(ah->irq, IRQ_TYPE_LEVEL_LOW);
- if (!info->error)
- ata_interrupt(irq, dev_instance);
+ set_irq_type(info->irq, IRQ_TYPE_LEVEL_LOW);
+ if (!info->frozen)
+ ata_sff_interrupt(irq, dev_instance);
} else {
- set_irq_type(ah->irq, IRQ_TYPE_LEVEL_HIGH);
+ 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 = {
- .port_disable = ata_port_disable,
-
- .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,
-
- .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_ports(struct ata_host *ah)
+static void rb153_pata_setup_port(struct ata_host *ah)
{
struct rb153_cf_info *info = ah->private_data;
struct ata_port *ap;
- struct ata_ioports *iop;
ap = ah->ports[0];
- iop = &ap->ioaddr;
ap->ops = &rb153_pata_port_ops;
ap->pio_mask = 0x1f; /* PIO4 */
- ap->flags |= ATA_FLAG_MMIO | ATA_FLAG_NO_LEGACY;
+ 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;
- iop->cmd_addr = info->iobase + RB153_CF_REG_CMD;
- iop->ctl_addr = info->iobase + RB153_CF_REG_CTRL;
- iop->altstatus_addr = info->iobase + RB153_CF_REG_CTRL;
- iop->data_addr = info->iobase + RB153_CF_REG_DATA;
+ ata_sff_std_ports(&ap->ioaddr);
- ata_std_ports(iop);
+ ap->ioaddr.data_addr = info->iobase + RB153_CF_REG_DATA;
}
static __devinit int rb153_pata_driver_probe(struct platform_device *pdev)
return ret;
}
- /* allocate host */
ah = ata_host_alloc(&pdev->dev, RB153_CF_MAXPORTS);
if (!ah)
return -ENOMEM;
return -ENOMEM;
ah->private_data = info;
+ info->gpio_line = gpio;
+ info->irq = irq;
info->iobase = devm_ioremap_nocache(&pdev->dev, res->start,
res->end - res->start + 1);
goto err_free_gpio;
}
- rb153_pata_setup_ports(ah);
+ rb153_pata_setup_port(ah);
- ret = ata_host_activate(ah, irq, ata_interrupt, IRQF_TRIGGER_HIGH,
- &rb153_pata_sht);
+ ret = ata_host_activate(ah, irq, rb153_pata_irq_handler,
+ IRQF_TRIGGER_LOW, &rb153_pata_sht);
if (ret)
goto err_free_gpio;
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");
+MODULE_LICENSE("GPL v2");
module_init(rb153_pata_module_init);
module_exit(rb153_pata_module_exit);
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