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@@ -0,0 +1,1005 @@
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+/*
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+ * drivers/block/mg_disk.c
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+ *
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+ * Support for the mGine m[g]flash IO mode.
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+ * Based on legacy hd.c
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+ *
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+ * (c) 2008 mGine Co.,LTD
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+ * (c) 2008 unsik Kim <donari75@gmail.com>
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 as
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+ * published by the Free Software Foundation.
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+ */
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+
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+#include <linux/kernel.h>
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+#include <linux/module.h>
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+#include <linux/fs.h>
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+#include <linux/blkdev.h>
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+#include <linux/hdreg.h>
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+#include <linux/libata.h>
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+#include <linux/interrupt.h>
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+#include <linux/delay.h>
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+#include <linux/platform_device.h>
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+#include <linux/gpio.h>
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+#include <linux/mg_disk.h>
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+
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+#define MG_RES_SEC (CONFIG_MG_DISK_RES << 1)
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+
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+static void mg_request(struct request_queue *);
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+
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+static void mg_dump_status(const char *msg, unsigned int stat,
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+ struct mg_host *host)
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+{
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+ char *name = MG_DISK_NAME;
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+ struct request *req;
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+
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+ if (host->breq) {
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+ req = elv_next_request(host->breq);
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+ if (req)
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+ name = req->rq_disk->disk_name;
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+ }
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+
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+ printk(KERN_ERR "%s: %s: status=0x%02x { ", name, msg, stat & 0xff);
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+ if (stat & MG_REG_STATUS_BIT_BUSY)
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+ printk("Busy ");
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+ if (stat & MG_REG_STATUS_BIT_READY)
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+ printk("DriveReady ");
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+ if (stat & MG_REG_STATUS_BIT_WRITE_FAULT)
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+ printk("WriteFault ");
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+ if (stat & MG_REG_STATUS_BIT_SEEK_DONE)
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+ printk("SeekComplete ");
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+ if (stat & MG_REG_STATUS_BIT_DATA_REQ)
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+ printk("DataRequest ");
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+ if (stat & MG_REG_STATUS_BIT_CORRECTED_ERROR)
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+ printk("CorrectedError ");
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+ if (stat & MG_REG_STATUS_BIT_ERROR)
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+ printk("Error ");
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+ printk("}\n");
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+ if ((stat & MG_REG_STATUS_BIT_ERROR) == 0) {
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+ host->error = 0;
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+ } else {
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+ host->error = inb((unsigned long)host->dev_base + MG_REG_ERROR);
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+ printk(KERN_ERR "%s: %s: error=0x%02x { ", name, msg,
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+ host->error & 0xff);
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+ if (host->error & MG_REG_ERR_BBK)
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+ printk("BadSector ");
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+ if (host->error & MG_REG_ERR_UNC)
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+ printk("UncorrectableError ");
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+ if (host->error & MG_REG_ERR_IDNF)
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+ printk("SectorIdNotFound ");
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+ if (host->error & MG_REG_ERR_ABRT)
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+ printk("DriveStatusError ");
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+ if (host->error & MG_REG_ERR_AMNF)
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+ printk("AddrMarkNotFound ");
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+ printk("}");
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+ if (host->error &
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+ (MG_REG_ERR_BBK | MG_REG_ERR_UNC |
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+ MG_REG_ERR_IDNF | MG_REG_ERR_AMNF)) {
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+ if (host->breq) {
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+ req = elv_next_request(host->breq);
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+ if (req)
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+ printk(", sector=%ld", req->sector);
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+ }
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+
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+ }
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+ printk("\n");
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+ }
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+}
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+
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+static unsigned int mg_wait(struct mg_host *host, u32 expect, u32 msec)
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+{
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+ u8 status;
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+ unsigned long expire, cur_jiffies;
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+ struct mg_drv_data *prv_data = host->dev->platform_data;
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+
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+ host->error = MG_ERR_NONE;
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+ expire = jiffies + msecs_to_jiffies(msec);
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+
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+ status = inb((unsigned long)host->dev_base + MG_REG_STATUS);
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+
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+ do {
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+ cur_jiffies = jiffies;
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+ if (status & MG_REG_STATUS_BIT_BUSY) {
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+ if (expect == MG_REG_STATUS_BIT_BUSY)
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+ break;
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+ } else {
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+ /* Check the error condition! */
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+ if (status & MG_REG_STATUS_BIT_ERROR) {
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+ mg_dump_status("mg_wait", status, host);
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+ break;
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+ }
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+
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+ if (expect == MG_STAT_READY)
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+ if (MG_READY_OK(status))
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+ break;
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+
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+ if (expect == MG_REG_STATUS_BIT_DATA_REQ)
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+ if (status & MG_REG_STATUS_BIT_DATA_REQ)
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+ break;
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+ }
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+ if (!msec) {
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+ mg_dump_status("not ready", status, host);
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+ return MG_ERR_INV_STAT;
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+ }
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+ if (prv_data->use_polling)
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+ msleep(1);
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+
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+ status = inb((unsigned long)host->dev_base + MG_REG_STATUS);
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+ } while (time_before(cur_jiffies, expire));
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+
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+ if (time_after_eq(cur_jiffies, expire) && msec)
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+ host->error = MG_ERR_TIMEOUT;
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+
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+ return host->error;
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+}
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+
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+static unsigned int mg_wait_rstout(u32 rstout, u32 msec)
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+{
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+ unsigned long expire;
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+
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+ expire = jiffies + msecs_to_jiffies(msec);
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+ while (time_before(jiffies, expire)) {
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+ if (gpio_get_value(rstout) == 1)
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+ return MG_ERR_NONE;
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+ msleep(10);
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+ }
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+
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+ return MG_ERR_RSTOUT;
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+}
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+
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+static void mg_unexpected_intr(struct mg_host *host)
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+{
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+ u32 status = inb((unsigned long)host->dev_base + MG_REG_STATUS);
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+
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+ mg_dump_status("mg_unexpected_intr", status, host);
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+}
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+
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+static irqreturn_t mg_irq(int irq, void *dev_id)
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+{
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+ struct mg_host *host = dev_id;
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+ void (*handler)(struct mg_host *) = host->mg_do_intr;
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+
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+ host->mg_do_intr = 0;
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+ del_timer(&host->timer);
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+ if (!handler)
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+ handler = mg_unexpected_intr;
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+ handler(host);
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+ return IRQ_HANDLED;
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+}
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+
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+static int mg_get_disk_id(struct mg_host *host)
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+{
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+ u32 i;
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+ s32 err;
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+ const u16 *id = host->id;
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+ struct mg_drv_data *prv_data = host->dev->platform_data;
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+ char fwrev[ATA_ID_FW_REV_LEN + 1];
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+ char model[ATA_ID_PROD_LEN + 1];
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+ char serial[ATA_ID_SERNO_LEN + 1];
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+
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+ if (!prv_data->use_polling)
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+ outb(MG_REG_CTRL_INTR_DISABLE,
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+ (unsigned long)host->dev_base +
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+ MG_REG_DRV_CTRL);
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+
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+ outb(MG_CMD_ID, (unsigned long)host->dev_base + MG_REG_COMMAND);
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+ err = mg_wait(host, MG_REG_STATUS_BIT_DATA_REQ, MG_TMAX_WAIT_RD_DRQ);
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+ if (err)
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+ return err;
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+
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+ for (i = 0; i < (MG_SECTOR_SIZE >> 1); i++)
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+ host->id[i] = le16_to_cpu(inw((unsigned long)host->dev_base +
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+ MG_BUFF_OFFSET + i * 2));
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+
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+ outb(MG_CMD_RD_CONF, (unsigned long)host->dev_base + MG_REG_COMMAND);
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+ err = mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD);
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+ if (err)
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+ return err;
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+
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+ if ((id[ATA_ID_FIELD_VALID] & 1) == 0)
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+ return MG_ERR_TRANSLATION;
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+
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+ host->n_sectors = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
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+ host->cyls = id[ATA_ID_CYLS];
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+ host->heads = id[ATA_ID_HEADS];
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+ host->sectors = id[ATA_ID_SECTORS];
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+
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+ if (MG_RES_SEC && host->heads && host->sectors) {
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+ /* modify cyls, n_sectors */
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+ host->cyls = (host->n_sectors - MG_RES_SEC) /
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+ host->heads / host->sectors;
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+ host->nres_sectors = host->n_sectors - host->cyls *
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+ host->heads * host->sectors;
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+ host->n_sectors -= host->nres_sectors;
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+ }
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+
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+ ata_id_c_string(id, fwrev, ATA_ID_FW_REV, sizeof(fwrev));
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+ ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
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+ ata_id_c_string(id, serial, ATA_ID_SERNO, sizeof(serial));
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+ printk(KERN_INFO "mg_disk: model: %s\n", model);
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+ printk(KERN_INFO "mg_disk: firm: %.8s\n", fwrev);
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+ printk(KERN_INFO "mg_disk: serial: %s\n", serial);
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+ printk(KERN_INFO "mg_disk: %d + reserved %d sectors\n",
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+ host->n_sectors, host->nres_sectors);
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+
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+ if (!prv_data->use_polling)
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+ outb(MG_REG_CTRL_INTR_ENABLE, (unsigned long)host->dev_base +
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+ MG_REG_DRV_CTRL);
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+
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+ return err;
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+}
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+
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+
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+static int mg_disk_init(struct mg_host *host)
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+{
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+ struct mg_drv_data *prv_data = host->dev->platform_data;
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+ s32 err;
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+ u8 init_status;
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+
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+ /* hdd rst low */
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+ gpio_set_value(host->rst, 0);
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+ err = mg_wait(host, MG_REG_STATUS_BIT_BUSY, MG_TMAX_RST_TO_BUSY);
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+ if (err)
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+ return err;
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+
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+ /* hdd rst high */
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+ gpio_set_value(host->rst, 1);
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+ err = mg_wait(host, MG_STAT_READY, MG_TMAX_HDRST_TO_RDY);
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+ if (err)
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+ return err;
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+
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+ /* soft reset on */
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+ outb(MG_REG_CTRL_RESET |
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+ (prv_data->use_polling ? MG_REG_CTRL_INTR_DISABLE :
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+ MG_REG_CTRL_INTR_ENABLE),
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+ (unsigned long)host->dev_base + MG_REG_DRV_CTRL);
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+ err = mg_wait(host, MG_REG_STATUS_BIT_BUSY, MG_TMAX_RST_TO_BUSY);
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+ if (err)
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+ return err;
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+
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+ /* soft reset off */
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+ outb(prv_data->use_polling ? MG_REG_CTRL_INTR_DISABLE :
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+ MG_REG_CTRL_INTR_ENABLE,
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+ (unsigned long)host->dev_base + MG_REG_DRV_CTRL);
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+ err = mg_wait(host, MG_STAT_READY, MG_TMAX_SWRST_TO_RDY);
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+ if (err)
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+ return err;
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+
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+ init_status = inb((unsigned long)host->dev_base + MG_REG_STATUS) & 0xf;
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+
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+ if (init_status == 0xf)
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+ return MG_ERR_INIT_STAT;
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+
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+ return err;
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+}
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+
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+static void mg_bad_rw_intr(struct mg_host *host)
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+{
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+ struct request *req = elv_next_request(host->breq);
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+ if (req != NULL)
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+ if (++req->errors >= MG_MAX_ERRORS ||
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+ host->error == MG_ERR_TIMEOUT)
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+ end_request(req, 0);
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+}
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+
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+static unsigned int mg_out(struct mg_host *host,
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+ unsigned int sect_num,
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+ unsigned int sect_cnt,
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+ unsigned int cmd,
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+ void (*intr_addr)(struct mg_host *))
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+{
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+ struct mg_drv_data *prv_data = host->dev->platform_data;
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+
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+ if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD))
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+ return host->error;
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+
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+ if (!prv_data->use_polling) {
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+ host->mg_do_intr = intr_addr;
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+ mod_timer(&host->timer, jiffies + 3 * HZ);
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+ }
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+ if (MG_RES_SEC)
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+ sect_num += MG_RES_SEC;
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+ outb((u8)sect_cnt, (unsigned long)host->dev_base + MG_REG_SECT_CNT);
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+ outb((u8)sect_num, (unsigned long)host->dev_base + MG_REG_SECT_NUM);
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+ outb((u8)(sect_num >> 8), (unsigned long)host->dev_base +
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+ MG_REG_CYL_LOW);
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+ outb((u8)(sect_num >> 16), (unsigned long)host->dev_base +
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+ MG_REG_CYL_HIGH);
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+ outb((u8)((sect_num >> 24) | MG_REG_HEAD_LBA_MODE),
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+ (unsigned long)host->dev_base + MG_REG_DRV_HEAD);
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+ outb(cmd, (unsigned long)host->dev_base + MG_REG_COMMAND);
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+ return MG_ERR_NONE;
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+}
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+
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+static void mg_read(struct request *req)
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+{
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+ u32 remains, j;
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+ struct mg_host *host = req->rq_disk->private_data;
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+
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+ remains = req->nr_sectors;
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+
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+ if (mg_out(host, req->sector, req->nr_sectors, MG_CMD_RD, 0) !=
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+ MG_ERR_NONE)
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+ mg_bad_rw_intr(host);
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+
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+ MG_DBG("requested %d sects (from %ld), buffer=0x%p\n",
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+ remains, req->sector, req->buffer);
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+
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+ while (remains) {
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+ if (mg_wait(host, MG_REG_STATUS_BIT_DATA_REQ,
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+ MG_TMAX_WAIT_RD_DRQ) != MG_ERR_NONE) {
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+ mg_bad_rw_intr(host);
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+ return;
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+ }
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+ for (j = 0; j < MG_SECTOR_SIZE >> 1; j++) {
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+ *(u16 *)req->buffer =
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+ inw((unsigned long)host->dev_base +
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+ MG_BUFF_OFFSET + (j << 1));
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+ req->buffer += 2;
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+ }
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+
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+ req->sector++;
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+ req->errors = 0;
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+ remains = --req->nr_sectors;
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+ --req->current_nr_sectors;
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+
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+ if (req->current_nr_sectors <= 0) {
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+ MG_DBG("remain : %d sects\n", remains);
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+ end_request(req, 1);
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+ if (remains > 0)
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+ req = elv_next_request(host->breq);
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+ }
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+
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+ outb(MG_CMD_RD_CONF, (unsigned long)host->dev_base +
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+ MG_REG_COMMAND);
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+ }
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+}
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+
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+static void mg_write(struct request *req)
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+{
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+ u32 remains, j;
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+ struct mg_host *host = req->rq_disk->private_data;
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+
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+ remains = req->nr_sectors;
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+
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+ if (mg_out(host, req->sector, req->nr_sectors, MG_CMD_WR, 0) !=
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+ MG_ERR_NONE) {
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+ mg_bad_rw_intr(host);
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+ return;
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+ }
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+
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+
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+ MG_DBG("requested %d sects (from %ld), buffer=0x%p\n",
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+ remains, req->sector, req->buffer);
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+ while (remains) {
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+ if (mg_wait(host, MG_REG_STATUS_BIT_DATA_REQ,
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+ MG_TMAX_WAIT_WR_DRQ) != MG_ERR_NONE) {
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+ mg_bad_rw_intr(host);
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+ return;
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+ }
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+ for (j = 0; j < MG_SECTOR_SIZE >> 1; j++) {
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+ outw(*(u16 *)req->buffer,
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|
|
+ (unsigned long)host->dev_base +
|
|
|
+ MG_BUFF_OFFSET + (j << 1));
|
|
|
+ req->buffer += 2;
|
|
|
+ }
|
|
|
+ req->sector++;
|
|
|
+ remains = --req->nr_sectors;
|
|
|
+ --req->current_nr_sectors;
|
|
|
+
|
|
|
+ if (req->current_nr_sectors <= 0) {
|
|
|
+ MG_DBG("remain : %d sects\n", remains);
|
|
|
+ end_request(req, 1);
|
|
|
+ if (remains > 0)
|
|
|
+ req = elv_next_request(host->breq);
|
|
|
+ }
|
|
|
+
|
|
|
+ outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base +
|
|
|
+ MG_REG_COMMAND);
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static void mg_read_intr(struct mg_host *host)
|
|
|
+{
|
|
|
+ u32 i;
|
|
|
+ struct request *req;
|
|
|
+
|
|
|
+ /* check status */
|
|
|
+ do {
|
|
|
+ i = inb((unsigned long)host->dev_base + MG_REG_STATUS);
|
|
|
+ if (i & MG_REG_STATUS_BIT_BUSY)
|
|
|
+ break;
|
|
|
+ if (!MG_READY_OK(i))
|
|
|
+ break;
|
|
|
+ if (i & MG_REG_STATUS_BIT_DATA_REQ)
|
|
|
+ goto ok_to_read;
|
|
|
+ } while (0);
|
|
|
+ mg_dump_status("mg_read_intr", i, host);
|
|
|
+ mg_bad_rw_intr(host);
|
|
|
+ mg_request(host->breq);
|
|
|
+ return;
|
|
|
+
|
|
|
+ok_to_read:
|
|
|
+ /* get current segment of request */
|
|
|
+ req = elv_next_request(host->breq);
|
|
|
+
|
|
|
+ /* read 1 sector */
|
|
|
+ for (i = 0; i < MG_SECTOR_SIZE >> 1; i++) {
|
|
|
+ *(u16 *)req->buffer =
|
|
|
+ inw((unsigned long)host->dev_base + MG_BUFF_OFFSET +
|
|
|
+ (i << 1));
|
|
|
+ req->buffer += 2;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* manipulate request */
|
|
|
+ MG_DBG("sector %ld, remaining=%ld, buffer=0x%p\n",
|
|
|
+ req->sector, req->nr_sectors - 1, req->buffer);
|
|
|
+
|
|
|
+ req->sector++;
|
|
|
+ req->errors = 0;
|
|
|
+ i = --req->nr_sectors;
|
|
|
+ --req->current_nr_sectors;
|
|
|
+
|
|
|
+ /* let know if current segment done */
|
|
|
+ if (req->current_nr_sectors <= 0)
|
|
|
+ end_request(req, 1);
|
|
|
+
|
|
|
+ /* set handler if read remains */
|
|
|
+ if (i > 0) {
|
|
|
+ host->mg_do_intr = mg_read_intr;
|
|
|
+ mod_timer(&host->timer, jiffies + 3 * HZ);
|
|
|
+ }
|
|
|
+
|
|
|
+ /* send read confirm */
|
|
|
+ outb(MG_CMD_RD_CONF, (unsigned long)host->dev_base + MG_REG_COMMAND);
|
|
|
+
|
|
|
+ /* goto next request */
|
|
|
+ if (!i)
|
|
|
+ mg_request(host->breq);
|
|
|
+}
|
|
|
+
|
|
|
+static void mg_write_intr(struct mg_host *host)
|
|
|
+{
|
|
|
+ u32 i, j;
|
|
|
+ u16 *buff;
|
|
|
+ struct request *req;
|
|
|
+
|
|
|
+ /* get current segment of request */
|
|
|
+ req = elv_next_request(host->breq);
|
|
|
+
|
|
|
+ /* check status */
|
|
|
+ do {
|
|
|
+ i = inb((unsigned long)host->dev_base + MG_REG_STATUS);
|
|
|
+ if (i & MG_REG_STATUS_BIT_BUSY)
|
|
|
+ break;
|
|
|
+ if (!MG_READY_OK(i))
|
|
|
+ break;
|
|
|
+ if ((req->nr_sectors <= 1) || (i & MG_REG_STATUS_BIT_DATA_REQ))
|
|
|
+ goto ok_to_write;
|
|
|
+ } while (0);
|
|
|
+ mg_dump_status("mg_write_intr", i, host);
|
|
|
+ mg_bad_rw_intr(host);
|
|
|
+ mg_request(host->breq);
|
|
|
+ return;
|
|
|
+
|
|
|
+ok_to_write:
|
|
|
+ /* manipulate request */
|
|
|
+ req->sector++;
|
|
|
+ i = --req->nr_sectors;
|
|
|
+ --req->current_nr_sectors;
|
|
|
+ req->buffer += MG_SECTOR_SIZE;
|
|
|
+
|
|
|
+ /* let know if current segment or all done */
|
|
|
+ if (!i || (req->bio && req->current_nr_sectors <= 0))
|
|
|
+ end_request(req, 1);
|
|
|
+
|
|
|
+ /* write 1 sector and set handler if remains */
|
|
|
+ if (i > 0) {
|
|
|
+ buff = (u16 *)req->buffer;
|
|
|
+ for (j = 0; j < MG_STORAGE_BUFFER_SIZE >> 1; j++) {
|
|
|
+ outw(*buff, (unsigned long)host->dev_base +
|
|
|
+ MG_BUFF_OFFSET + (j << 1));
|
|
|
+ buff++;
|
|
|
+ }
|
|
|
+ MG_DBG("sector %ld, remaining=%ld, buffer=0x%p\n",
|
|
|
+ req->sector, req->nr_sectors, req->buffer);
|
|
|
+ host->mg_do_intr = mg_write_intr;
|
|
|
+ mod_timer(&host->timer, jiffies + 3 * HZ);
|
|
|
+ }
|
|
|
+
|
|
|
+ /* send write confirm */
|
|
|
+ outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base + MG_REG_COMMAND);
|
|
|
+
|
|
|
+ if (!i)
|
|
|
+ mg_request(host->breq);
|
|
|
+}
|
|
|
+
|
|
|
+void mg_times_out(unsigned long data)
|
|
|
+{
|
|
|
+ struct mg_host *host = (struct mg_host *)data;
|
|
|
+ char *name;
|
|
|
+ struct request *req;
|
|
|
+
|
|
|
+ req = elv_next_request(host->breq);
|
|
|
+ if (!req)
|
|
|
+ return;
|
|
|
+
|
|
|
+ host->mg_do_intr = NULL;
|
|
|
+
|
|
|
+ name = req->rq_disk->disk_name;
|
|
|
+ printk(KERN_DEBUG "%s: timeout\n", name);
|
|
|
+
|
|
|
+ host->error = MG_ERR_TIMEOUT;
|
|
|
+ mg_bad_rw_intr(host);
|
|
|
+
|
|
|
+ mg_request(host->breq);
|
|
|
+}
|
|
|
+
|
|
|
+static void mg_request_poll(struct request_queue *q)
|
|
|
+{
|
|
|
+ struct request *req;
|
|
|
+ struct mg_host *host;
|
|
|
+
|
|
|
+ while ((req = elv_next_request(q)) != NULL) {
|
|
|
+ host = req->rq_disk->private_data;
|
|
|
+ if (blk_fs_request(req)) {
|
|
|
+ switch (rq_data_dir(req)) {
|
|
|
+ case READ:
|
|
|
+ mg_read(req);
|
|
|
+ break;
|
|
|
+ case WRITE:
|
|
|
+ mg_write(req);
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ printk(KERN_WARNING "%s:%d unknown command\n",
|
|
|
+ __func__, __LINE__);
|
|
|
+ end_request(req, 0);
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static unsigned int mg_issue_req(struct request *req,
|
|
|
+ struct mg_host *host,
|
|
|
+ unsigned int sect_num,
|
|
|
+ unsigned int sect_cnt)
|
|
|
+{
|
|
|
+ u16 *buff;
|
|
|
+ u32 i;
|
|
|
+
|
|
|
+ switch (rq_data_dir(req)) {
|
|
|
+ case READ:
|
|
|
+ if (mg_out(host, sect_num, sect_cnt, MG_CMD_RD, &mg_read_intr)
|
|
|
+ != MG_ERR_NONE) {
|
|
|
+ mg_bad_rw_intr(host);
|
|
|
+ return host->error;
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ case WRITE:
|
|
|
+ /* TODO : handler */
|
|
|
+ outb(MG_REG_CTRL_INTR_DISABLE,
|
|
|
+ (unsigned long)host->dev_base +
|
|
|
+ MG_REG_DRV_CTRL);
|
|
|
+ if (mg_out(host, sect_num, sect_cnt, MG_CMD_WR, &mg_write_intr)
|
|
|
+ != MG_ERR_NONE) {
|
|
|
+ mg_bad_rw_intr(host);
|
|
|
+ return host->error;
|
|
|
+ }
|
|
|
+ del_timer(&host->timer);
|
|
|
+ mg_wait(host, MG_REG_STATUS_BIT_DATA_REQ, MG_TMAX_WAIT_WR_DRQ);
|
|
|
+ outb(MG_REG_CTRL_INTR_ENABLE, (unsigned long)host->dev_base +
|
|
|
+ MG_REG_DRV_CTRL);
|
|
|
+ if (host->error) {
|
|
|
+ mg_bad_rw_intr(host);
|
|
|
+ return host->error;
|
|
|
+ }
|
|
|
+ buff = (u16 *)req->buffer;
|
|
|
+ for (i = 0; i < MG_SECTOR_SIZE >> 1; i++) {
|
|
|
+ outw(*buff, (unsigned long)host->dev_base +
|
|
|
+ MG_BUFF_OFFSET + (i << 1));
|
|
|
+ buff++;
|
|
|
+ }
|
|
|
+ mod_timer(&host->timer, jiffies + 3 * HZ);
|
|
|
+ outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base +
|
|
|
+ MG_REG_COMMAND);
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ printk(KERN_WARNING "%s:%d unknown command\n",
|
|
|
+ __func__, __LINE__);
|
|
|
+ end_request(req, 0);
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ return MG_ERR_NONE;
|
|
|
+}
|
|
|
+
|
|
|
+/* This function also called from IRQ context */
|
|
|
+static void mg_request(struct request_queue *q)
|
|
|
+{
|
|
|
+ struct request *req;
|
|
|
+ struct mg_host *host;
|
|
|
+ u32 sect_num, sect_cnt;
|
|
|
+
|
|
|
+ while (1) {
|
|
|
+ req = elv_next_request(q);
|
|
|
+ if (!req)
|
|
|
+ return;
|
|
|
+
|
|
|
+ host = req->rq_disk->private_data;
|
|
|
+
|
|
|
+ /* check unwanted request call */
|
|
|
+ if (host->mg_do_intr)
|
|
|
+ return;
|
|
|
+
|
|
|
+ del_timer(&host->timer);
|
|
|
+
|
|
|
+ sect_num = req->sector;
|
|
|
+ /* deal whole segments */
|
|
|
+ sect_cnt = req->nr_sectors;
|
|
|
+
|
|
|
+ /* sanity check */
|
|
|
+ if (sect_num >= get_capacity(req->rq_disk) ||
|
|
|
+ ((sect_num + sect_cnt) >
|
|
|
+ get_capacity(req->rq_disk))) {
|
|
|
+ printk(KERN_WARNING
|
|
|
+ "%s: bad access: sector=%d, count=%d\n",
|
|
|
+ req->rq_disk->disk_name,
|
|
|
+ sect_num, sect_cnt);
|
|
|
+ end_request(req, 0);
|
|
|
+ continue;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (!blk_fs_request(req))
|
|
|
+ return;
|
|
|
+
|
|
|
+ if (!mg_issue_req(req, host, sect_num, sect_cnt))
|
|
|
+ return;
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static int mg_getgeo(struct block_device *bdev, struct hd_geometry *geo)
|
|
|
+{
|
|
|
+ struct mg_host *host = bdev->bd_disk->private_data;
|
|
|
+
|
|
|
+ geo->cylinders = (unsigned short)host->cyls;
|
|
|
+ geo->heads = (unsigned char)host->heads;
|
|
|
+ geo->sectors = (unsigned char)host->sectors;
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static struct block_device_operations mg_disk_ops = {
|
|
|
+ .getgeo = mg_getgeo
|
|
|
+};
|
|
|
+
|
|
|
+static int mg_suspend(struct platform_device *plat_dev, pm_message_t state)
|
|
|
+{
|
|
|
+ struct mg_drv_data *prv_data = plat_dev->dev.platform_data;
|
|
|
+ struct mg_host *host = prv_data->host;
|
|
|
+
|
|
|
+ if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD))
|
|
|
+ return -EIO;
|
|
|
+
|
|
|
+ if (!prv_data->use_polling)
|
|
|
+ outb(MG_REG_CTRL_INTR_DISABLE,
|
|
|
+ (unsigned long)host->dev_base +
|
|
|
+ MG_REG_DRV_CTRL);
|
|
|
+
|
|
|
+ outb(MG_CMD_SLEEP, (unsigned long)host->dev_base + MG_REG_COMMAND);
|
|
|
+ /* wait until mflash deep sleep */
|
|
|
+ msleep(1);
|
|
|
+
|
|
|
+ if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD)) {
|
|
|
+ if (!prv_data->use_polling)
|
|
|
+ outb(MG_REG_CTRL_INTR_ENABLE,
|
|
|
+ (unsigned long)host->dev_base +
|
|
|
+ MG_REG_DRV_CTRL);
|
|
|
+ return -EIO;
|
|
|
+ }
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static int mg_resume(struct platform_device *plat_dev)
|
|
|
+{
|
|
|
+ struct mg_drv_data *prv_data = plat_dev->dev.platform_data;
|
|
|
+ struct mg_host *host = prv_data->host;
|
|
|
+
|
|
|
+ if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD))
|
|
|
+ return -EIO;
|
|
|
+
|
|
|
+ outb(MG_CMD_WAKEUP, (unsigned long)host->dev_base + MG_REG_COMMAND);
|
|
|
+ /* wait until mflash wakeup */
|
|
|
+ msleep(1);
|
|
|
+
|
|
|
+ if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD))
|
|
|
+ return -EIO;
|
|
|
+
|
|
|
+ if (!prv_data->use_polling)
|
|
|
+ outb(MG_REG_CTRL_INTR_ENABLE, (unsigned long)host->dev_base +
|
|
|
+ MG_REG_DRV_CTRL);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static int mg_probe(struct platform_device *plat_dev)
|
|
|
+{
|
|
|
+ struct mg_host *host;
|
|
|
+ struct resource *rsc;
|
|
|
+ struct mg_drv_data *prv_data = plat_dev->dev.platform_data;
|
|
|
+ int err = 0;
|
|
|
+
|
|
|
+ if (!prv_data) {
|
|
|
+ printk(KERN_ERR "%s:%d fail (no driver_data)\n",
|
|
|
+ __func__, __LINE__);
|
|
|
+ err = -EINVAL;
|
|
|
+ goto probe_err;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* alloc mg_host */
|
|
|
+ host = kzalloc(sizeof(struct mg_host), GFP_KERNEL);
|
|
|
+ if (!host) {
|
|
|
+ printk(KERN_ERR "%s:%d fail (no memory for mg_host)\n",
|
|
|
+ __func__, __LINE__);
|
|
|
+ err = -ENOMEM;
|
|
|
+ goto probe_err;
|
|
|
+ }
|
|
|
+ host->major = MG_DISK_MAJ;
|
|
|
+
|
|
|
+ /* link each other */
|
|
|
+ prv_data->host = host;
|
|
|
+ host->dev = &plat_dev->dev;
|
|
|
+
|
|
|
+ /* io remap */
|
|
|
+ rsc = platform_get_resource(plat_dev, IORESOURCE_MEM, 0);
|
|
|
+ if (!rsc) {
|
|
|
+ printk(KERN_ERR "%s:%d platform_get_resource fail\n",
|
|
|
+ __func__, __LINE__);
|
|
|
+ err = -EINVAL;
|
|
|
+ goto probe_err_2;
|
|
|
+ }
|
|
|
+ host->dev_base = ioremap(rsc->start , rsc->end + 1);
|
|
|
+ if (!host->dev_base) {
|
|
|
+ printk(KERN_ERR "%s:%d ioremap fail\n",
|
|
|
+ __func__, __LINE__);
|
|
|
+ err = -EIO;
|
|
|
+ goto probe_err_2;
|
|
|
+ }
|
|
|
+ MG_DBG("dev_base = 0x%x\n", (u32)host->dev_base);
|
|
|
+
|
|
|
+ /* get reset pin */
|
|
|
+ rsc = platform_get_resource_byname(plat_dev, IORESOURCE_IO,
|
|
|
+ MG_RST_PIN);
|
|
|
+ if (!rsc) {
|
|
|
+ printk(KERN_ERR "%s:%d get reset pin fail\n",
|
|
|
+ __func__, __LINE__);
|
|
|
+ err = -EIO;
|
|
|
+ goto probe_err_3;
|
|
|
+ }
|
|
|
+ host->rst = rsc->start;
|
|
|
+
|
|
|
+ /* init rst pin */
|
|
|
+ err = gpio_request(host->rst, MG_RST_PIN);
|
|
|
+ if (err)
|
|
|
+ goto probe_err_3;
|
|
|
+ gpio_direction_output(host->rst, 1);
|
|
|
+
|
|
|
+ /* reset out pin */
|
|
|
+ if (!(prv_data->dev_attr & MG_DEV_MASK))
|
|
|
+ goto probe_err_3a;
|
|
|
+
|
|
|
+ if (prv_data->dev_attr != MG_BOOT_DEV) {
|
|
|
+ rsc = platform_get_resource_byname(plat_dev, IORESOURCE_IO,
|
|
|
+ MG_RSTOUT_PIN);
|
|
|
+ if (!rsc) {
|
|
|
+ printk(KERN_ERR "%s:%d get reset-out pin fail\n",
|
|
|
+ __func__, __LINE__);
|
|
|
+ err = -EIO;
|
|
|
+ goto probe_err_3a;
|
|
|
+ }
|
|
|
+ host->rstout = rsc->start;
|
|
|
+ err = gpio_request(host->rstout, MG_RSTOUT_PIN);
|
|
|
+ if (err)
|
|
|
+ goto probe_err_3a;
|
|
|
+ gpio_direction_input(host->rstout);
|
|
|
+ }
|
|
|
+
|
|
|
+ /* disk reset */
|
|
|
+ if (prv_data->dev_attr == MG_STORAGE_DEV) {
|
|
|
+ /* If POR seq. not yet finised, wait */
|
|
|
+ err = mg_wait_rstout(host->rstout, MG_TMAX_RSTOUT);
|
|
|
+ if (err)
|
|
|
+ goto probe_err_3b;
|
|
|
+ err = mg_disk_init(host);
|
|
|
+ if (err) {
|
|
|
+ printk(KERN_ERR "%s:%d fail (err code : %d)\n",
|
|
|
+ __func__, __LINE__, err);
|
|
|
+ err = -EIO;
|
|
|
+ goto probe_err_3b;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /* get irq resource */
|
|
|
+ if (!prv_data->use_polling) {
|
|
|
+ host->irq = platform_get_irq(plat_dev, 0);
|
|
|
+ if (host->irq == -ENXIO) {
|
|
|
+ err = host->irq;
|
|
|
+ goto probe_err_3b;
|
|
|
+ }
|
|
|
+ err = request_irq(host->irq, mg_irq,
|
|
|
+ IRQF_DISABLED | IRQF_TRIGGER_RISING,
|
|
|
+ MG_DEV_NAME, host);
|
|
|
+ if (err) {
|
|
|
+ printk(KERN_ERR "%s:%d fail (request_irq err=%d)\n",
|
|
|
+ __func__, __LINE__, err);
|
|
|
+ goto probe_err_3b;
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /* get disk id */
|
|
|
+ err = mg_get_disk_id(host);
|
|
|
+ if (err) {
|
|
|
+ printk(KERN_ERR "%s:%d fail (err code : %d)\n",
|
|
|
+ __func__, __LINE__, err);
|
|
|
+ err = -EIO;
|
|
|
+ goto probe_err_4;
|
|
|
+ }
|
|
|
+
|
|
|
+ err = register_blkdev(host->major, MG_DISK_NAME);
|
|
|
+ if (err < 0) {
|
|
|
+ printk(KERN_ERR "%s:%d register_blkdev fail (err code : %d)\n",
|
|
|
+ __func__, __LINE__, err);
|
|
|
+ goto probe_err_4;
|
|
|
+ }
|
|
|
+ if (!host->major)
|
|
|
+ host->major = err;
|
|
|
+
|
|
|
+ spin_lock_init(&host->lock);
|
|
|
+
|
|
|
+ if (prv_data->use_polling)
|
|
|
+ host->breq = blk_init_queue(mg_request_poll, &host->lock);
|
|
|
+ else
|
|
|
+ host->breq = blk_init_queue(mg_request, &host->lock);
|
|
|
+
|
|
|
+ if (!host->breq) {
|
|
|
+ err = -ENOMEM;
|
|
|
+ printk(KERN_ERR "%s:%d (blk_init_queue) fail\n",
|
|
|
+ __func__, __LINE__);
|
|
|
+ goto probe_err_5;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* mflash is random device, thanx for the noop */
|
|
|
+ elevator_exit(host->breq->elevator);
|
|
|
+ err = elevator_init(host->breq, "noop");
|
|
|
+ if (err) {
|
|
|
+ printk(KERN_ERR "%s:%d (elevator_init) fail\n",
|
|
|
+ __func__, __LINE__);
|
|
|
+ goto probe_err_6;
|
|
|
+ }
|
|
|
+ blk_queue_max_sectors(host->breq, MG_MAX_SECTS);
|
|
|
+ blk_queue_hardsect_size(host->breq, MG_SECTOR_SIZE);
|
|
|
+
|
|
|
+ init_timer(&host->timer);
|
|
|
+ host->timer.function = mg_times_out;
|
|
|
+ host->timer.data = (unsigned long)host;
|
|
|
+
|
|
|
+ host->gd = alloc_disk(MG_DISK_MAX_PART);
|
|
|
+ if (!host->gd) {
|
|
|
+ printk(KERN_ERR "%s:%d (alloc_disk) fail\n",
|
|
|
+ __func__, __LINE__);
|
|
|
+ err = -ENOMEM;
|
|
|
+ goto probe_err_7;
|
|
|
+ }
|
|
|
+ host->gd->major = host->major;
|
|
|
+ host->gd->first_minor = 0;
|
|
|
+ host->gd->fops = &mg_disk_ops;
|
|
|
+ host->gd->queue = host->breq;
|
|
|
+ host->gd->private_data = host;
|
|
|
+ sprintf(host->gd->disk_name, MG_DISK_NAME"a");
|
|
|
+
|
|
|
+ set_capacity(host->gd, host->n_sectors);
|
|
|
+
|
|
|
+ add_disk(host->gd);
|
|
|
+
|
|
|
+ return err;
|
|
|
+
|
|
|
+probe_err_7:
|
|
|
+ del_timer_sync(&host->timer);
|
|
|
+probe_err_6:
|
|
|
+ blk_cleanup_queue(host->breq);
|
|
|
+probe_err_5:
|
|
|
+ unregister_blkdev(MG_DISK_MAJ, MG_DISK_NAME);
|
|
|
+probe_err_4:
|
|
|
+ if (!prv_data->use_polling)
|
|
|
+ free_irq(host->irq, host);
|
|
|
+probe_err_3b:
|
|
|
+ gpio_free(host->rstout);
|
|
|
+probe_err_3a:
|
|
|
+ gpio_free(host->rst);
|
|
|
+probe_err_3:
|
|
|
+ iounmap(host->dev_base);
|
|
|
+probe_err_2:
|
|
|
+ kfree(host);
|
|
|
+probe_err:
|
|
|
+ return err;
|
|
|
+}
|
|
|
+
|
|
|
+static int mg_remove(struct platform_device *plat_dev)
|
|
|
+{
|
|
|
+ struct mg_drv_data *prv_data = plat_dev->dev.platform_data;
|
|
|
+ struct mg_host *host = prv_data->host;
|
|
|
+ int err = 0;
|
|
|
+
|
|
|
+ /* delete timer */
|
|
|
+ del_timer_sync(&host->timer);
|
|
|
+
|
|
|
+ /* remove disk */
|
|
|
+ if (host->gd) {
|
|
|
+ del_gendisk(host->gd);
|
|
|
+ put_disk(host->gd);
|
|
|
+ }
|
|
|
+ /* remove queue */
|
|
|
+ if (host->breq)
|
|
|
+ blk_cleanup_queue(host->breq);
|
|
|
+
|
|
|
+ /* unregister blk device */
|
|
|
+ unregister_blkdev(host->major, MG_DISK_NAME);
|
|
|
+
|
|
|
+ /* free irq */
|
|
|
+ if (!prv_data->use_polling)
|
|
|
+ free_irq(host->irq, host);
|
|
|
+
|
|
|
+ /* free reset-out pin */
|
|
|
+ if (prv_data->dev_attr != MG_BOOT_DEV)
|
|
|
+ gpio_free(host->rstout);
|
|
|
+
|
|
|
+ /* free rst pin */
|
|
|
+ if (host->rst)
|
|
|
+ gpio_free(host->rst);
|
|
|
+
|
|
|
+ /* unmap io */
|
|
|
+ if (host->dev_base)
|
|
|
+ iounmap(host->dev_base);
|
|
|
+
|
|
|
+ /* free mg_host */
|
|
|
+ kfree(host);
|
|
|
+
|
|
|
+ return err;
|
|
|
+}
|
|
|
+
|
|
|
+static struct platform_driver mg_disk_driver = {
|
|
|
+ .probe = mg_probe,
|
|
|
+ .remove = mg_remove,
|
|
|
+ .suspend = mg_suspend,
|
|
|
+ .resume = mg_resume,
|
|
|
+ .driver = {
|
|
|
+ .name = MG_DEV_NAME,
|
|
|
+ .owner = THIS_MODULE,
|
|
|
+ }
|
|
|
+};
|
|
|
+
|
|
|
+/****************************************************************************
|
|
|
+ *
|
|
|
+ * Module stuff
|
|
|
+ *
|
|
|
+ ****************************************************************************/
|
|
|
+
|
|
|
+static int __init mg_init(void)
|
|
|
+{
|
|
|
+ printk(KERN_INFO "mGine mflash driver, (c) 2008 mGine Co.\n");
|
|
|
+ return platform_driver_register(&mg_disk_driver);
|
|
|
+}
|
|
|
+
|
|
|
+static void __exit mg_exit(void)
|
|
|
+{
|
|
|
+ printk(KERN_INFO "mflash driver : bye bye\n");
|
|
|
+ platform_driver_unregister(&mg_disk_driver);
|
|
|
+}
|
|
|
+
|
|
|
+module_init(mg_init);
|
|
|
+module_exit(mg_exit);
|
|
|
+
|
|
|
+MODULE_LICENSE("GPL");
|
|
|
+MODULE_AUTHOR("unsik Kim <donari75@gmail.com>");
|
|
|
+MODULE_DESCRIPTION("mGine m[g]flash device driver");
|
Linus Torvalds