path: root/drivers/mmc/sdhci.c

/*
 *  linux/drivers/mmc/sdhci.c - Secure Digital Host Controller Interface driver
 *
 *  Copyright (C) 2005-2006 Pierre Ossman, All Rights Reserved.
 *
 * 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.
 */

 /*
  * Note that PIO transfer is rather crappy atm. The buffer full/empty
  * interrupts aren't reliable so we currently transfer the entire buffer
  * directly. Patches to solve the problem are welcome.
  */

#include <linux/delay.h>
#include <linux/highmem.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>

#include <linux/mmc/host.h>
#include <linux/mmc/protocol.h>

#include <asm/scatterlist.h>

#include "sdhci.h"

#define DRIVER_NAME "sdhci"
#define DRIVER_VERSION "0.11"

#define BUGMAIL "<sdhci-devel@list.drzeus.cx>"

#ifdef CONFIG_MMC_DEBUG
#define DBG(f, x...) \
	printk(KERN_DEBUG DRIVER_NAME " [%s()]: " f, __func__,## x)
#else
#define DBG(f, x...) do { } while (0)
#endif

static const struct pci_device_id pci_ids[] __devinitdata = {
	/* handle any SD host controller */
	{PCI_DEVICE_CLASS((PCI_CLASS_SYSTEM_SDHCI << 8), 0xFFFF00)},
	{ /* end: all zeroes */ },
};

MODULE_DEVICE_TABLE(pci, pci_ids);

static void sdhci_prepare_data(struct sdhci_host *, struct mmc_data *);
static void sdhci_finish_data(struct sdhci_host *);

static void sdhci_send_command(struct sdhci_host *, struct mmc_command *);
static void sdhci_finish_command(struct sdhci_host *);

static void sdhci_dumpregs(struct sdhci_host *host)
{
	printk(KERN_DEBUG DRIVER_NAME ": ============== REGISTER DUMP ==============\n");

	printk(KERN_DEBUG DRIVER_NAME ": Sys addr: 0x%08x | Version:  0x%08x\n",
		readl(host->ioaddr + SDHCI_DMA_ADDRESS),
		readw(host->ioaddr + SDHCI_HOST_VERSION));
	printk(KERN_DEBUG DRIVER_NAME ": Blk size: 0x%08x | Blk cnt:  0x%08x\n",
		readw(host->ioaddr + SDHCI_BLOCK_SIZE),
		readw(host->ioaddr + SDHCI_BLOCK_COUNT));
	printk(KERN_DEBUG DRIVER_NAME ": Argument: 0x%08x | Trn mode: 0x%08x\n",
		readl(host->ioaddr + SDHCI_ARGUMENT),
		readw(host->ioaddr + SDHCI_TRANSFER_MODE));
	printk(KERN_DEBUG DRIVER_NAME ": Present:  0x%08x | Host ctl: 0x%08x\n",
		readl(host->ioaddr + SDHCI_PRESENT_STATE),
		readb(host->ioaddr + SDHCI_HOST_CONTROL));
	printk(KERN_DEBUG DRIVER_NAME ": Power:    0x%08x | Blk gap:  0x%08x\n",
		readb(host->ioaddr + SDHCI_POWER_CONTROL),
		readb(host->ioaddr + SDHCI_BLOCK_GAP_CONTROL));
	printk(KERN_DEBUG DRIVER_NAME ": Wake-up:  0x%08x | Clock:    0x%08x\n",
		readb(host->ioaddr + SDHCI_WALK_UP_CONTROL),
		readw(host->ioaddr + SDHCI_CLOCK_CONTROL));
	printk(KERN_DEBUG DRIVER_NAME ": Timeout:  0x%08x | Int stat: 0x%08x\n",
		readb(host->ioaddr + SDHCI_TIMEOUT_CONTROL),
		readl(host->ioaddr + SDHCI_INT_STATUS));
	printk(KERN_DEBUG DRIVER_NAME ": Int enab: 0x%08x | Sig enab: 0x%08x\n",
		readl(host->ioaddr + SDHCI_INT_ENABLE),
		readl(host->ioaddr + </