xref: /openbmc/linux/drivers/mmc/host/toshsd.c (revision 372a12ed9d99c02f105278a9b75f0cb176d15cc1)

/*
 *  Toshiba PCI Secure Digital Host Controller Interface driver
 *
 *  Copyright (C) 2014 Ondrej Zary
 *  Copyright (C) 2007 Richard Betts, All Rights Reserved.
 *
 *	Based on asic3_mmc.c, copyright (c) 2005 SDG Systems, LLC and,
 *	sdhci.c, copyright (C) 2005-2006 Pierre Ossman
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or (at
 * your option) any later version.
 */

#include <linux/delay.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/scatterlist.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/mmc/host.h>
#include <linux/mmc/mmc.h>

#include "toshsd.h"

#define DRIVER_NAME "toshsd"

static const struct pci_device_id pci_ids[] = {
	{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA, 0x0805) },
	{ /* end: all zeroes */ },
};

MODULE_DEVICE_TABLE(pci, pci_ids);

static void toshsd_init(struct toshsd_host *host)
{
	/* enable clock */
	pci_write_config_byte(host->pdev, SD_PCICFG_CLKSTOP,
					SD_PCICFG_CLKSTOP_ENABLE_ALL);
	pci_write_config_byte(host->pdev, SD_PCICFG_CARDDETECT, 2);

	/* reset */
	iowrite16(0, host->ioaddr + SD_SOFTWARERESET); /* assert */
	mdelay(2);
	iowrite16(1, host->ioaddr + SD_SOFTWARERESET); /* deassert */
	mdelay(2);

	/* Clear card registers */
	iowrite16(0, host->ioaddr + SD_CARDCLOCKCTRL);
	iowrite32(0, host->ioaddr + SD_CARDSTATUS);
	iowrite32(0, host->ioaddr + SD_ERRORSTATUS0);
	iowrite16(0, host->ioaddr + SD_STOPINTERNAL);

	/* SDIO clock? */
	iowrite16(0x100, host->ioaddr + SDIO_BASE + SDIO_CLOCKNWAITCTRL);

	/* enable LED */
	pci_write_config_byte(host->pdev, SD_PCICFG_SDLED_ENABLE1,
					SD_PCICFG_LED_ENABLE1_START);
	pci_write_config_byte(host->pdev, SD_PCICFG_SDLED_ENABLE2,
					SD_PCICFG_LED_ENABLE2_START);

	/* set interrupt masks */
	iowrite32(~(u32)(SD_CARD_RESP_END | SD_CARD_RW_END
			| SD_CARD_CARD_REMOVED_0 | SD_CARD_CARD_INSERTED_0
			| SD_BUF_READ_ENABLE | SD_BUF_WRITE_ENABLE
			| SD_BUF_CMD_TIMEOUT),
			host->ioaddr + SD_INTMASKCARD);

	iowrite16(0x1000, host->ioaddr + SD_TRANSACTIONCTRL);
}

/* Set MMC clock / power.
 * Note: This controller uses a simple divider scheme therefore it cannot run
 * SD/MMC cards at full speed (24/20MHz). HCLK (=33MHz PCI clock?) is too high
 * and the next slowest is 16MHz (div=2).
 */
static void __toshsd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
{
	struct toshsd_host *host = mmc_priv(mmc);

	if (ios->clock) {
		u16 clk;
		int div = 1;

		while (ios->clock < HCLK / div)
			div *= 2;

		clk = div >> 2;

		if (div == 1) { /* disable the divider */
			pci_write_config_byte(host->pdev, SD_PCICFG_CLKMODE,
					      SD_PCICFG_CLKMODE_DIV_DISABLE);
			clk |= SD_CARDCLK_DIV_DISABLE;
		} else
			pci_write_config_byte(host->pdev, SD_PCICFG_CLKMODE, 0);

		clk |= SD_CARDCLK_ENABLE_CLOCK;
		iowrite16(clk, host->ioaddr + SD_CARDCLOCKCTRL);

		mdelay(10);
	} else
		iowrite16(0, host->ioaddr + SD_CARDCLOCKCTRL);

	switch (ios->power_mode) {
	case MMC_POWER_OFF:
		pci_write_config_byte(host->pdev, SD_PCICFG_POWER1,
					SD_PCICFG_PWR1_OFF);
		mdelay(1);
		break;
	case MMC_POWER_UP:
		break;
	case MMC_POWER_ON:
		pci_write_config_byte(host->pdev, SD_PCICFG_POWER1,
					SD_PCICFG_PWR1_33V);
		pci_write_config_byte(host->pdev, SD_PCICFG_POWER2,
					SD_PCICFG_PWR2_AUTO);
		mdelay(20);
		break;
	}

	switch (ios->bus_width) {
	case MMC_BUS_WIDTH_1:
		iowrite16(SD_CARDOPT_REQUIRED | SD_CARDOPT_DATA_RESP_TIMEOUT(14)
				| SD_CARDOPT_C2_MODULE_ABSENT
				| SD_CARDOPT_DATA_XFR_WIDTH_1,
				host->ioaddr + SD_CARDOPTIONSETUP);
		break;
	case MMC_BUS_WIDTH_4:
		iowrite16(SD_CARDOPT_REQUIRED | SD_CARDOPT_DATA_RESP_TIMEOUT(14)
				| SD_CARDOPT_C2_MODULE_ABSENT
				| SD_CARDOPT_DATA_XFR_WIDTH_4,
				host->ioaddr + SD_CARDOPTIONSETUP);
		break;
	}
}

static void toshsd_set_led(struct toshsd_host *host, unsigned char state)
{
	iowrite16(state, host->ioaddr + SDIO_BASE + SDIO_LEDCTRL);
}

static void toshsd_finish_request(struct toshsd_host *host)
{
	struct mmc_request *mrq = host->mrq;

	/* Write something to end the command */
	host->mrq = NULL;
	host->cmd = NULL;
	host->data = NULL;

	toshsd_set_led(host, 0);
	mmc_request_done(host->mmc, mrq);
}

static irqreturn_t toshsd_thread_irq(int irq, void *dev_id)
{
	struct toshsd_host *host = dev_id;
	struct mmc_data *data = host->data;
	struct sg_mapping_iter *sg_miter = &host->sg_miter;
	unsigned short *buf;
	int count;
	unsigned long flags;

	if (!data) {
		dev_warn(&host->pdev->dev, "Spurious Data IRQ\n");
		if (host->cmd) {
			host->cmd->error = -EIO;
			toshsd_finish_request(host);
		}
		return IRQ_NONE;
	}
	spin_lock_irqsave(&host->lock, flags);

	if (!sg_miter_next(sg_miter))
		goto done;

	buf = sg_miter->addr;

	/* Ensure we dont read more than one block. The chip will interrupt us
	 * When the next block is available.
	 */
	count = sg_miter->length;
	if (count > data->blksz)
		count = data->blksz;

	dev_dbg(&host->pdev->dev, "count: %08x, flags %08x\n", count,
		data->flags);

	/* Transfer the data */
	if (data->flags & MMC_DATA_READ)
		ioread32_rep(host->ioaddr + SD_DATAPORT, buf, count >> 2);
	else
		iowrite32_rep(host->ioaddr + SD_DATAPORT, buf, count >> 2);

	sg_miter->consumed = count;
	sg_miter_stop(sg_miter);

done:
	spin_unlock_irqrestore(&host->lock, flags);

	return IRQ_HANDLED;
}

static void toshsd_cmd_irq(struct toshsd_host *host)
{
	struct mmc_command *cmd = host->cmd;
	u8 *buf;
	u16 data;

	if (!host->cmd) {
		dev_warn(&host->pdev->dev, "Spurious CMD irq\n");
		return;
	}
	buf = (u8 *)cmd->resp;
	host->cmd = NULL;

	if (cmd->flags & MMC_RSP_PRESENT && cmd->flags & MMC_RSP_136) {
		/* R2 */
		buf[12] = 0xff;
		data = ioread16(host->ioaddr + SD_RESPONSE0);
		buf[13] = data & 0xff;
		buf[14] = data >> 8;
		data = ioread16(host->ioaddr + SD_RESPONSE1);
		buf[15] = data & 0xff;
		buf[8] = data >> 8;
		data = ioread16(host->ioaddr + SD_RESPONSE2);
		buf[9] = data & 0xff;
		buf[10] = data >> 8;
		data = ioread16(host->ioaddr + SD_RESPONSE3);
		buf[11] = data & 0xff;
		buf[4] = data >> 8;
		data = ioread16(host->ioaddr + SD_RESPONSE4);
		buf[5] = data & 0xff;
		buf[6] = data >> 8;
		data = ioread16(host->ioaddr + SD_RESPONSE5);
		buf[7] = data & 0xff;
		buf[0] = data >> 8;
		data = ioread16(host->ioaddr + SD_RESPONSE6);
		buf[1] = data & 0xff;
		buf[2] = data >> 8;
		data = ioread16(host->ioaddr + SD_RESPONSE7);
		buf[3] = data & 0xff;
	} else if (cmd->flags & MMC_RSP_PRESENT) {
		/* R1, R1B, R3, R6, R7 */
		data = ioread16(host->ioaddr + SD_RESPONSE0);
		buf[0] = data & 0xff;
		buf[1] = data >> 8;
		data = ioread16(host->ioaddr + SD_RESPONSE1);
		buf[2] = data & 0xff;
		buf[3] = data >> 8;
	}

	dev_dbg(&host->pdev->dev, "Command IRQ complete %d %d %x\n",
		cmd->opcode, cmd->error, cmd->flags);

	/* If there is data to handle we will
	 * finish the request in the mmc_data_end_irq handler.*/
	if (host->data)
		return;

	toshsd_finish_request(host);
}

static void toshsd_data_end_irq(struct toshsd_host *host)
{
	struct mmc_data *data = host->data;

	host->data = NULL;

	if (!data) {
		dev_warn(&host->pdev->dev, "Spurious data end IRQ\n");
		return;
	}

	if (data->error == 0)
		data->bytes_xfered = data->blocks * data->blksz;
	else
		data->bytes_xfered = 0;

	dev_dbg(&host->pdev->dev, "Completed data request xfr=%d\n",
		data->bytes_xfered);

	iowrite16(0, host->ioaddr + SD_STOPINTERNAL);

	toshsd_finish_request(host);
}

static irqreturn_t toshsd_irq(int irq, void *dev_id)
{
	struct toshsd_host *host = dev_id;
	u32 int_reg, int_mask, int_status, detail;
	int error = 0, ret = IRQ_HANDLED;

	spin_lock(&host->lock);
	int_status = ioread32(host->ioaddr + SD_CARDSTATUS);
	int_mask = ioread32(host->ioaddr + SD_INTMASKCARD);
	int_reg = int_status & ~int_mask & ~IRQ_DONT_CARE_BITS;

	dev_dbg(&host->pdev->dev, "IRQ status:%x mask:%x\n",
		int_status, int_mask);

	/* nothing to do: it's not our IRQ */
	if (!int_reg) {
		ret = IRQ_NONE;
		goto irq_end;
	}

	if (int_reg & SD_BUF_CMD_TIMEOUT) {
		error = -ETIMEDOUT;
		dev_dbg(&host->pdev->dev, "Timeout\n");
	} else if (int_reg & SD_BUF_CRC_ERR) {
		error = -EILSEQ;
		dev_err(&host->pdev->dev, "BadCRC\n");
	} else if (int_reg & (SD_BUF_ILLEGAL_ACCESS
				| SD_BUF_CMD_INDEX_ERR
				| SD_BUF_STOP_BIT_END_ERR
				| SD_BUF_OVERFLOW
				| SD_BUF_UNDERFLOW
				| SD_BUF_DATA_TIMEOUT)) {
		dev_err(&host->pdev->dev, "Buffer status error: { %s%s%s%s%s%s}\n",
			int_reg & SD_BUF_ILLEGAL_ACCESS ? "ILLEGAL_ACC " : "",
			int_reg & SD_BUF_CMD_INDEX_ERR ? "CMD_INDEX " : "",
			int_reg & SD_BUF_STOP_BIT_END_ERR ? "STOPBIT_END " : "",
			int_reg & SD_BUF_OVERFLOW ? "OVERFLOW " : "",
			int_reg & SD_BUF_UNDERFLOW ? "UNDERFLOW " : "",
			int_reg & SD_BUF_DATA_TIMEOUT ? "DATA_TIMEOUT " : "");

		detail = ioread32(host->ioaddr + SD_ERRORSTATUS0);
		dev_err(&host->pdev->dev, "detail error status { %s%s%s%s%s%s%s%s%s%s%s%s%s}\n",
			detail & SD_ERR0_RESP_CMD_ERR ? "RESP_CMD " : "",
			detail & SD_ERR0_RESP_NON_CMD12_END_BIT_ERR ? "RESP_END_BIT " : "",
			detail & SD_ERR0_RESP_CMD12_END_BIT_ERR ? "RESP_END_BIT " : "",
			detail & SD_ERR0_READ_DATA_END_BIT_ERR ? "READ_DATA_END_BIT " : "",
			detail & SD_ERR0_WRITE_CRC_STATUS_END_BIT_ERR ? "WRITE_CMD_END_BIT " : "",
			detail & SD_ERR0_RESP_NON_CMD12_CRC_ERR ? "RESP_CRC " : "",
			detail & SD_ERR0_RESP_CMD12_CRC_ERR ? "RESP_CRC " : "",
			detail & SD_ERR0_READ_DATA_CRC_ERR ? "READ_DATA_CRC " : "",
			detail & SD_ERR0_WRITE_CMD_CRC_ERR ? "WRITE_CMD_CRC " : "",
			detail & SD_ERR1_NO_CMD_RESP ? "NO_CMD_RESP " : "",
			detail & SD_ERR1_TIMEOUT_READ_DATA ? "READ_DATA_TIMEOUT " : "",
			detail & SD_ERR1_TIMEOUT_CRS_STATUS ? "CRS_STATUS_TIMEOUT " : "",
			detail & SD_ERR1_TIMEOUT_CRC_BUSY ? "CRC_BUSY_TIMEOUT " : "");
		error = -EIO;
	}

	if (error) {
		if (host->cmd)
			host->cmd->error = error;

		if (error == -ETIMEDOUT) {
			iowrite32(int_status &
				  ~(SD_BUF_CMD_TIMEOUT | SD_CARD_RESP_END),
				  host->ioaddr + SD_CARDSTATUS);
		} else {
			toshsd_init(host);
			__toshsd_set_ios(host->mmc, &host->mmc->ios);
			goto irq_end;
		}
	}

	/* Card insert/remove. The mmc controlling code is stateless. */
	if (int_reg & (SD_CARD_CARD_INSERTED_0 | SD_CARD_CARD_REMOVED_0)) {
		iowrite32(int_status &
			  ~(SD_CARD_CARD_REMOVED_0 | SD_CARD_CARD_INSERTED_0),
			  host->ioaddr + SD_CARDSTATUS);

		if (int_reg & SD_CARD_CARD_INSERTED_0)
			toshsd_init(host);

		mmc_detect_change(host->mmc, 1);
	}

	/* Data transfer */
	if (int_reg & (SD_BUF_READ_ENABLE | SD_BUF_WRITE_ENABLE)) {
		iowrite32(int_status &
			  ~(SD_BUF_WRITE_ENABLE | SD_BUF_READ_ENABLE),
			  host->ioaddr + SD_CARDSTATUS);

		ret = IRQ_WAKE_THREAD;
		goto irq_end;
	}

	/* Command completion */
	if (int_reg & SD_CARD_RESP_END) {
		iowrite32(int_status & ~(SD_CARD_RESP_END),
			  host->ioaddr + SD_CARDSTATUS);
		toshsd_cmd_irq(host);
	}

	/* Data transfer completion */
	if (int_reg & SD_CARD_RW_END) {
		iowrite32(int_status & ~(SD_CARD_RW_END),
			  host->ioaddr + SD_CARDSTATUS);
		toshsd_data_end_irq(host);
	}
irq_end:
	spin_unlock(&host->lock);
	return ret;
}

static void toshsd_start_cmd(struct toshsd_host *host, struct mmc_command *cmd)
{
	struct mmc_data *data = host->data;
	int c = cmd->opcode;

	dev_dbg(&host->pdev->dev, "Command opcode: %d\n", cmd->opcode);

	if (cmd->opcode == MMC_STOP_TRANSMISSION) {
		iowrite16(SD_STOPINT_ISSUE_CMD12,
			  host->ioaddr + SD_STOPINTERNAL);

		cmd->resp[0] = cmd->opcode;
		cmd->resp[1] = 0;
		cmd->resp[2] = 0;
		cmd->resp[3] = 0;

		toshsd_finish_request(host);
		return;
	}

	switch (mmc_resp_type(cmd)) {
	case MMC_RSP_NONE:
		c |= SD_CMD_RESP_TYPE_NONE;
		break;

	case MMC_RSP_R1:
		c |= SD_CMD_RESP_TYPE_EXT_R1;
		break;
	case MMC_RSP_R1B:
		c |= SD_CMD_RESP_TYPE_EXT_R1B;
		break;
	case MMC_RSP_R2:
		c |= SD_CMD_RESP_TYPE_EXT_R2;
		break;
	case MMC_RSP_R3:
		c |= SD_CMD_RESP_TYPE_EXT_R3;
		break;

	default:
		dev_err(&host->pdev->dev, "Unknown response type %d\n",
			mmc_resp_type(cmd));
		break;
	}

	host->cmd = cmd;

	if (cmd->opcode == MMC_APP_CMD)
		c |= SD_CMD_TYPE_ACMD;

	if (cmd->opcode == MMC_GO_IDLE_STATE)
		c |= (3 << 8);  /* removed from ipaq-asic3.h for some reason */

	if (data) {
		c |= SD_CMD_DATA_PRESENT;

		if (data->blocks > 1) {
			iowrite16(SD_STOPINT_AUTO_ISSUE_CMD12,
				  host->ioaddr + SD_STOPINTERNAL);
			c |= SD_CMD_MULTI_BLOCK;
		}

		if (data->flags & MMC_DATA_READ)
			c |= SD_CMD_TRANSFER_READ;

		/* MMC_DATA_WRITE does not require a bit to be set */
	}

	/* Send the command */
	iowrite32(cmd->arg, host->ioaddr + SD_ARG0);
	iowrite16(c, host->ioaddr + SD_CMD);
}

static void toshsd_start_data(struct toshsd_host *host, struct mmc_data *data)
{
	unsigned int flags = SG_MITER_ATOMIC;

	dev_dbg(&host->pdev->dev, "setup data transfer: blocksize %08x  nr_blocks %d, offset: %08x\n",
		data->blksz, data->blocks, data->sg->offset);

	host->data = data;

	if (data->flags & MMC_DATA_READ)
		flags |= SG_MITER_TO_SG;
	else
		flags |= SG_MITER_FROM_SG;

	sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags);

	/* Set transfer length and blocksize */
	iowrite16(data->blocks, host->ioaddr + SD_BLOCKCOUNT);
	iowrite16(data->blksz, host->ioaddr + SD_CARDXFERDATALEN);
}

/* Process requests from the MMC layer */
static void toshsd_request(struct mmc_host *mmc, struct mmc_request *mrq)
{
	struct toshsd_host *host = mmc_priv(mmc);
	unsigned long flags;

	/* abort if card not present */
	if (!(ioread16(host->ioaddr + SD_CARDSTATUS) & SD_CARD_PRESENT_0)) {
		mrq->cmd->error = -ENOMEDIUM;
		mmc_request_done(mmc, mrq);
		return;
	}

	spin_lock_irqsave(&host->lock, flags);

	WARN_ON(host->mrq != NULL);

	host->mrq = mrq;

	if (mrq->data)
		toshsd_start_data(host, mrq->data);

	toshsd_set_led(host, 1);

	toshsd_start_cmd(host, mrq->cmd);

	spin_unlock_irqrestore(&host->lock, flags);
}

static void toshsd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
{
	struct toshsd_host *host = mmc_priv(mmc);
	unsigned long flags;

	spin_lock_irqsave(&host->lock, flags);
	__toshsd_set_ios(mmc, ios);
	spin_unlock_irqrestore(&host->lock, flags);
}

static int toshsd_get_ro(struct mmc_host *mmc)
{
	struct toshsd_host *host = mmc_priv(mmc);

	/* active low */
	return !(ioread16(host->ioaddr + SD_CARDSTATUS) & SD_CARD_WRITE_PROTECT);
}

static int toshsd_get_cd(struct mmc_host *mmc)
{
	struct toshsd_host *host = mmc_priv(mmc);

	return !!(ioread16(host->ioaddr + SD_CARDSTATUS) & SD_CARD_PRESENT_0);
}

static struct mmc_host_ops toshsd_ops = {
	.request = toshsd_request,
	.set_ios = toshsd_set_ios,
	.get_ro = toshsd_get_ro,
	.get_cd = toshsd_get_cd,
};


static void toshsd_powerdown(struct toshsd_host *host)
{
	/* mask all interrupts */
	iowrite32(0xffffffff, host->ioaddr + SD_INTMASKCARD);
	/* disable card clock */
	iowrite16(0x000, host->ioaddr + SDIO_BASE + SDIO_CLOCKNWAITCTRL);
	iowrite16(0, host->ioaddr + SD_CARDCLOCKCTRL);
	/* power down card */
	pci_write_config_byte(host->pdev, SD_PCICFG_POWER1, SD_PCICFG_PWR1_OFF);
	/* disable clock */
	pci_write_config_byte(host->pdev, SD_PCICFG_CLKSTOP, 0);
}

#ifdef CONFIG_PM_SLEEP
static int toshsd_pm_suspend(struct device *dev)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	struct toshsd_host *host = pci_get_drvdata(pdev);

	toshsd_powerdown(host);

	pci_save_state(pdev);
	pci_enable_wake(pdev, PCI_D3hot, 0);
	pci_disable_device(pdev);
	pci_set_power_state(pdev, PCI_D3hot);

	return 0;
}

static int toshsd_pm_resume(struct device *dev)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	struct toshsd_host *host = pci_get_drvdata(pdev);
	int ret;

	pci_set_power_state(pdev, PCI_D0);
	pci_restore_state(pdev);
	ret = pci_enable_device(pdev);
	if (ret)
		return ret;

	toshsd_init(host);

	return 0;
}
#endif /* CONFIG_PM_SLEEP */

static int toshsd_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	int ret;
	struct toshsd_host *host;
	struct mmc_host *mmc;
	resource_size_t base;

	ret = pci_enable_device(pdev);
	if (ret)
		return ret;

	mmc = mmc_alloc_host(sizeof(struct toshsd_host), &pdev->dev);
	if (!mmc) {
		ret = -ENOMEM;
		goto err;
	}

	host = mmc_priv(mmc);
	host->mmc = mmc;

	host->pdev = pdev;
	pci_set_drvdata(pdev, host);

	ret = pci_request_regions(pdev, DRIVER_NAME);
	if (ret)
		goto free;

	host->ioaddr = pci_iomap(pdev, 0, 0);
	if (!host->ioaddr) {
		ret = -ENOMEM;
		goto release;
	}

	/* Set MMC host parameters */
	mmc->ops = &toshsd_ops;
	mmc->caps = MMC_CAP_4_BIT_DATA;
	mmc->ocr_avail = MMC_VDD_32_33;

	mmc->f_min = HCLK / 512;
	mmc->f_max = HCLK;

	spin_lock_init(&host->lock);

	toshsd_init(host);

	ret = request_threaded_irq(pdev->irq, toshsd_irq, toshsd_thread_irq,
				   IRQF_SHARED, DRIVER_NAME, host);
	if (ret)
		goto unmap;

	mmc_add_host(mmc);

	base = pci_resource_start(pdev, 0);
	dev_dbg(&pdev->dev, "MMIO %pa, IRQ %d\n", &base, pdev->irq);

	pm_suspend_ignore_children(&pdev->dev, 1);

	return 0;

unmap:
	pci_iounmap(pdev, host->ioaddr);
release:
	pci_release_regions(pdev);
free:
	mmc_free_host(mmc);
	pci_set_drvdata(pdev, NULL);
err:
	pci_disable_device(pdev);
	return ret;
}

static void toshsd_remove(struct pci_dev *pdev)
{
	struct toshsd_host *host = pci_get_drvdata(pdev);

	mmc_remove_host(host->mmc);
	toshsd_powerdown(host);
	free_irq(pdev->irq, host);
	pci_iounmap(pdev, host->ioaddr);
	pci_release_regions(pdev);
	mmc_free_host(host->mmc);
	pci_set_drvdata(pdev, NULL);
	pci_disable_device(pdev);
}

static const struct dev_pm_ops toshsd_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(toshsd_pm_suspend, toshsd_pm_resume)
};

static struct pci_driver toshsd_driver = {
	.name = DRIVER_NAME,
	.id_table = pci_ids,
	.probe = toshsd_probe,
	.remove = toshsd_remove,
	.driver.pm = &toshsd_pm_ops,
};

module_pci_driver(toshsd_driver);

MODULE_AUTHOR("Ondrej Zary, Richard Betts");
MODULE_DESCRIPTION("Toshiba PCI Secure Digital Host Controller Interface driver");
MODULE_LICENSE("GPL");