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From 73c65ac21faf1b016f8f8ddfab2dc3e58a5618f9 Mon Sep 17 00:00:00 2001
From: Alison Wang <b18965@freescale.com>
Date: Thu, 4 Aug 2011 09:59:46 +0800
Subject: [PATCH 29/52] Add eSDHC driver for MCF5441x
Add eSDHC PIO mode(read and write) and DMA mode(read and write) support.
Add card detect using extern irq.
Signed-off-by: Alison Wang <b18965@freescale.com>
---
drivers/mmc/host/Kconfig | 35 +
drivers/mmc/host/Makefile | 1 +
drivers/mmc/host/esdhc.c | 1826 +++++++++++++++++++++++++++++++++++++++++++++
drivers/mmc/host/esdhc.h | 310 ++++++++
4 files changed, 2172 insertions(+), 0 deletions(-)
create mode 100644 drivers/mmc/host/esdhc.c
create mode 100644 drivers/mmc/host/esdhc.h
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -403,6 +403,41 @@ config DETECT_USE_EXTERN_IRQ1
endchoice
+config MMC_ESDHC
+ tristate "Enhanced Secure Digital Host Controller Interface support"
+ depends on M5441X
+ help
+ This select Freescale Enhanced SD Host Controller Interface.
+ The controller is used in MCF5441x.
+ If unsure, say N.
+
+config ESDHC_FORCE_PIO
+ tristate "eSDHC force to use PIO (no DMA) mode"
+ depends on MMC_ESDHC
+ help
+ This select Freescale Enhanced SD Host Controller Interface.
+ The controller is used in MCF5441x.
+ If unsure, say N.
+
+choice
+ prompt "MMC/SD card detect "
+ depends on MMC_ESDHC
+
+config ESDHC_DETECT_USE_EXTERN_IRQ7
+ bool "based extern IRQ7"
+ depends on MMC_ESDHC
+ help
+ MMC/SD cards using esdhc controller,
+ we use the extern irq7 to detect card.
+config ESDHC_DETECT_USE_EXTERN_IRQ1
+ bool "based extern IRQ1"
+ depends on MMC_ESDHC
+ help
+ MMC/SD cards using esdhc controller,
+ we use the extern irq7 to detect card.
+
+endchoice
+
config MMC_S3C
tristate "Samsung S3C SD/MMC Card Interface support"
depends on ARCH_S3C2410
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -28,6 +28,7 @@ endif
obj-$(CONFIG_MMC_S3C) += s3cmci.o
obj-$(CONFIG_MMC_SDRICOH_CS) += sdricoh_cs.o
obj-$(CONFIG_MMC_TMIO) += tmio_mmc.o
+obj-$(CONFIG_MMC_ESDHC) += esdhc.o
obj-$(CONFIG_MMC_CB710) += cb710-mmc.o
obj-$(CONFIG_MMC_VIA_SDMMC) += via-sdmmc.o
obj-$(CONFIG_GPIOMMC) += gpiommc.o
--- /dev/null
+++ b/drivers/mmc/host/esdhc.c
@@ -0,0 +1,1826 @@
+/*
+ * drivers/mmc/host/esdhc.c
+ *
+ * Copyright (C) 2007-2011 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Author: Chenghu Wu <b16972@freescale.com>
+ * Xiaobo Xie <X.Xie@freescale.com>
+ *
+ * Freescale Enhanced Secure Digital Host Controller driver.
+ * Based on mpc837x/driver/mmc/host/esdhc.c done by Xiaobo Xie
+ * Ported to Coldfire platform by Chenghu Wu
+ *
+ * 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/module.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/highmem.h>
+#include <linux/dma-mapping.h>
+#include <linux/scatterlist.h>
+#include <linux/uaccess.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/mmc/host.h>
+
+#include <asm/dma.h>
+#include <asm/page.h>
+
+#include <linux/platform_device.h>
+#include <asm/coldfire.h>
+#include <asm/mcfsim.h>
+
+#include "esdhc.h"
+#define DRIVER_NAME "esdhc"
+
+
+#if defined(CONFIG_ESDHC_DETECT_USE_EXTERN_IRQ1)
+#define card_detect_extern_irq (64 + 1)
+#elif defined(CONFIG_ESDHC_DETECT_USE_EXTERN_IRQ7)
+#define card_detect_extern_irq (64 + 7)
+#else
+#define card_detect_extern_irq (64 + 7)
+#endif
+
+#undef ESDHC_DMA_KMALLOC
+
+#define SYS_BUSCLOCK 80000000
+#define ESDHC_DMA_SIZE 0x10000
+
+#undef MMC_ESDHC_DEBUG
+#undef MMC_ESDHC_DEBUG_REG
+
+#ifdef MMC_ESDHC_DEBUG
+#define DBG(fmt, args...) printk(KERN_INFO "[%s] " fmt "\n", __func__, ## args)
+#else
+#define DBG(fmt, args...) do {} while (0)
+#endif
+
+#ifdef MMC_ESDHC_DEBUG_REG
+static void esdhc_dumpregs(struct esdhc_host *host)
+{
+ printk(KERN_INFO "========= REGISTER DUMP ==========\n");
+
+ printk(KERN_INFO "Sysaddr: 0x%08x | Blkattr: 0x%08x\n",
+ fsl_readl(host->ioaddr + ESDHC_DMA_ADDRESS),
+ fsl_readl(host->ioaddr + ESDHC_BLOCK_ATTR));
+ printk(KERN_INFO "Argument: 0x%08x | COMMAND: 0x%08x\n",
+ fsl_readl(host->ioaddr + ESDHC_ARGUMENT),
+ fsl_readl(host->ioaddr + ESDHC_COMMAND));
+ printk(KERN_INFO "Present: 0x%08x | DMA ctl: 0x%08x\n",
+ fsl_readl(host->ioaddr + ESDHC_PRESENT_STATE),
+ fsl_readl(host->ioaddr + ESDHC_DMA_SYSCTL));
+ printk(KERN_INFO "PROCTL: 0x%08x | SYSCTL: 0x%08x\n",
+ fsl_readl(host->ioaddr + ESDHC_PROTOCOL_CONTROL),
+ fsl_readl(host->ioaddr + ESDHC_SYSTEM_CONTROL));
+ printk(KERN_INFO "Int stat: 0x%08x\n",
+ fsl_readl(host->ioaddr + ESDHC_INT_STATUS));
+ printk(KERN_INFO "Intenab: 0x%08x | Sigenab: 0x%08x\n",
+ fsl_readl(host->ioaddr + ESDHC_INT_ENABLE),
+ fsl_readl(host->ioaddr + ESDHC_SIGNAL_ENABLE));
+ printk(KERN_INFO "AC12 err: 0x%08x | Version: 0x%08x\n",
+ fsl_readl(host->ioaddr + ESDHC_ACMD12_ERR),
+ fsl_readl(host->ioaddr + ESDHC_HOST_VERSION));
+ printk(KERN_INFO "Caps: 0x%08x | Watermark: 0x%08x\n",
+ fsl_readl(host->ioaddr + ESDHC_CAPABILITIES),
+ fsl_readl(host->ioaddr + ESDHC_WML));
+ printk(KERN_INFO "MCF_INTC1_IPRH: 0x%08x | MCF_INTC1_IPRL: 0x%08x\n",
+ (unsigned int)MCF_INTC1_IPRH,
+ (unsigned int)MCF_INTC1_IPRL);
+ printk(KERN_INFO "MCF_INTC1_IMRH: 0x%08x | MCF_INTC1_IMRL: 0x%08x\n",
+ (unsigned int)MCF_INTC1_IMRH,
+ (unsigned int)MCF_INTC1_IMRL);
+ printk(KERN_INFO "MCF_INTC1_INTFRCH: 0x%08x | MCF_INTC1_INTFRCL: 0x%08x\n",
+ (unsigned int)MCF_INTC1_INTFRCH,
+ (unsigned int)MCF_INTC1_INTFRCL);
+ printk(KERN_INFO "MCF_INTC1_INTFRCH: 0x%08x | MCF_INTC1_INTFRCL: 0x%08x\n",
+ (unsigned int)MCF_INTC1_INTFRCH,
+ (unsigned int)MCF_INTC1_INTFRCL);
+ printk(KERN_INFO "MCF_INTC1_ICR63: 0x%08x | MCF_INTC0_ICR36: 0x%08x\n",
+ (unsigned int)MCF_INTC1_ICR63,
+ (unsigned int)MCF_INTC0_ICR36);
+
+ printk(KERN_INFO "==================================\n");
+}
+#else
+static void esdhc_dumpregs(struct esdhc_host *host)
+{
+ do {} while (0);
+}
+#endif
+
+
+static unsigned int debug_nodma;
+static unsigned int debug_forcedma;
+static unsigned int debug_quirks;
+
+#define ESDHC_QUIRK_CLOCK_BEFORE_RESET (1<<0)
+#define ESDHC_QUIRK_FORCE_DMA (1<<1)
+#define ESDHC_QUIRK_NO_CARD_NO_RESET (1<<2)
+#define ESDHC_QUIRK_SINGLE_POWER_WRITE (1<<3)
+
+static void esdhc_prepare_data(struct esdhc_host *, struct mmc_data *);
+static void esdhc_finish_data(struct esdhc_host *);
+static irqreturn_t esdhc_irq(int irq, void *dev_id);
+static void esdhc_send_command(struct esdhc_host *, struct mmc_command *);
+static void esdhc_finish_command(struct esdhc_host *);
+
+/*****************************************************************************\
+ * *
+ * Low level functions *
+ * *
+\*****************************************************************************/
+
+static void esdhc_reset(struct esdhc_host *host, u8 mask)
+{
+ unsigned long timeout;
+ unsigned int sysctl;
+
+ if (host->chip->quirks & ESDHC_QUIRK_NO_CARD_NO_RESET) {
+ if (!(fsl_readl(host->ioaddr + ESDHC_PRESENT_STATE) &
+ ESDHC_CARD_PRESENT))
+ return;
+ }
+
+ timeout = fsl_readl(host->ioaddr + ESDHC_SYSTEM_CONTROL);
+ timeout = timeout | (mask << ESDHC_RESET_SHIFT);
+ fsl_writel(host->ioaddr + ESDHC_SYSTEM_CONTROL, timeout);
+
+ if (mask & ESDHC_RESET_ALL) {
+ host->clock = 0;
+ host->bus_width = 0;
+ }
+
+ /* Wait max 100 ms */
+ timeout = 100;
+
+ /* hw clears the bit when it's done */
+ sysctl = (mask << ESDHC_RESET_SHIFT);
+ while (fsl_readl(host->ioaddr + ESDHC_SYSTEM_CONTROL) & sysctl) {
+ if (timeout == 0) {
+ printk(KERN_ERR "%s: Reset 0x%x never completed.\n",
+ mmc_hostname(host->mmc), (int)mask);
+ esdhc_dumpregs(host);
+ return;
+ }
+ timeout--;
+ mdelay(1);
+ }
+}
+
+static void esdhc_init(struct esdhc_host *host)
+{
+ u32 intmask;
+ /*reset eSDHC chip*/
+ esdhc_reset(host, ESDHC_RESET_ALL);
+
+ intmask = fsl_readl(host->ioaddr + ESDHC_PRESENT_STATE);
+ intmask = intmask & 0xF7000000;
+ fsl_writel(host->ioaddr + ESDHC_PRESENT_STATE, intmask);
+
+ intmask = fsl_readl(host->ioaddr + ESDHC_SYSTEM_CONTROL);
+ intmask = intmask | ESDHC_CLOCK_INT_EN | ESDHC_CLOCK_INT_STABLE;
+ fsl_writel(host->ioaddr + ESDHC_SYSTEM_CONTROL, intmask);
+
+ intmask = fsl_readl(host->ioaddr + ESDHC_INT_STATUS);
+ fsl_writel(host->ioaddr + ESDHC_INT_STATUS, intmask);
+
+ intmask = fsl_readl(host->ioaddr + ESDHC_INT_ENABLE);
+
+ fsl_writel(host->ioaddr + ESDHC_INT_ENABLE, intmask);
+ fsl_writel(host->ioaddr + ESDHC_SIGNAL_ENABLE, intmask);
+ /* Modelo does not support */
+ /*MCF_ESDHC_SCR = MCF_ESDHC_SCR | ESDHC_DMA_SNOOP | 0xC0;*/
+
+ intmask = fsl_readl(host->ioaddr + ESDHC_PROTOCOL_CONTROL);
+ intmask &= ~ESDHC_CTRL_D3_DETEC;
+
+ fsl_writel(host->ioaddr + ESDHC_PROTOCOL_CONTROL, intmask);
+ DBG(" init %x\n", fsl_readl(host->ioaddr + ESDHC_PROTOCOL_CONTROL));
+}
+
+static void reset_regs(struct esdhc_host *host)
+{
+ u32 intmask;
+
+ intmask = fsl_readl(host->ioaddr + ESDHC_INT_STATUS);
+ fsl_writel(host->ioaddr + ESDHC_INT_STATUS, intmask);
+
+ intmask = ESDHC_INT_DATA_END_BIT | ESDHC_INT_DATA_CRC |
+ ESDHC_INT_DATA_TIMEOUT | ESDHC_INT_INDEX |
+ ESDHC_INT_END_BIT | ESDHC_INT_CRC | ESDHC_INT_TIMEOUT |
+ ESDHC_INT_DATA_AVAIL | ESDHC_INT_SPACE_AVAIL |
+ ESDHC_INT_DMA_END | ESDHC_INT_DATA_END | ESDHC_INT_RESPONSE;
+
+ fsl_writel(host->ioaddr + ESDHC_INT_ENABLE, intmask);
+ fsl_writel(host->ioaddr + ESDHC_SIGNAL_ENABLE, intmask);
+
+ if (host->bus_width == MMC_BUS_WIDTH_4) {
+ intmask = fsl_readl(host->ioaddr + ESDHC_PROTOCOL_CONTROL);
+ intmask |= ESDHC_CTRL_4BITBUS;
+ fsl_writel(host->ioaddr + ESDHC_PROTOCOL_CONTROL, intmask);
+ }
+}
+
+/*****************************************************************************
+ * *
+ * Core functions *
+ * *
+ *****************************************************************************/
+/* Return the SG's virtual address */
+static inline char *esdhc_sg_to_buffer(struct esdhc_host *host)
+{
+ DBG("cur_sg %x virt %x\n", host->cur_sg, sg_virt(host->cur_sg));
+ return sg_virt(host->cur_sg);
+}
+
+static inline int esdhc_next_sg(struct esdhc_host *host)
+{
+ /*
+ * Skip to next SG entry.
+ */
+ host->cur_sg = sg_next(host->cur_sg);
+ host->num_sg--;
+
+ /*
+ * Any entries left?
+ */
+ if (host->num_sg > 0) {
+ host->offset = 0;
+ host->remain = host->cur_sg->length;
+ }
+
+ DBG("%s: host->remain %x %x\n", __func__, host->remain, host->num_sg);
+ return host->num_sg;
+}
+
+static void esdhc_read_block_pio(struct esdhc_host *host)
+{
+ int blksize, chunk_remain;
+ u32 data;
+ char *buffer;
+ int size;
+
+ DBG("PIO reading\n");
+
+ /* Delay prevents data read error in big files */
+ udelay(100);
+
+ blksize = host->data->blksz;
+ chunk_remain = 0;
+ data = 0;
+
+ buffer = esdhc_sg_to_buffer(host) + host->offset;
+
+ while (blksize) {
+ if (chunk_remain == 0) {
+ data = fsl_readl(host->ioaddr + ESDHC_BUFFER);
+ chunk_remain = min(blksize, 4);
+ }
+
+ size = min(host->remain, chunk_remain);
+
+ chunk_remain -= size;
+ blksize -= size;
+ host->offset += size;
+ host->remain -= size;
+
+ while (size) {
+ *buffer = data & 0xFF;
+ buffer++;
+ data >>= 8;
+ size--;
+ }
+
+ if (host->remain == 0) {
+ if (esdhc_next_sg(host) == 0) {
+ BUG_ON(blksize != 0);
+ return;
+ }
+ buffer = esdhc_sg_to_buffer(host);
+ }
+ }
+}
+
+static void esdhc_write_block_pio(struct esdhc_host *host)
+{
+ int blksize, chunk_remain;
+ u32 data;
+ char *buffer;
+ int bytes, size;
+
+ DBG("PIO writing\n");
+
+ /* Delay necessary when writing large data blocks to SD card */
+ udelay(100);
+
+ blksize = host->data->blksz;
+ chunk_remain = 4;
+ data = 0;
+
+ bytes = 0;
+ buffer = esdhc_sg_to_buffer(host) + host->offset;
+
+ while (blksize) {
+ size = min(host->remain, chunk_remain);
+
+ chunk_remain -= size;
+ blksize -= size;
+ host->offset += size;
+ host->remain -= size;
+
+ while (size) {
+ data >>= 8;
+ data |= (u32)*buffer << 24;
+ buffer++;
+ size--;
+ }
+
+ if (chunk_remain == 0) {
+ fsl_writel(host->ioaddr + ESDHC_BUFFER, data);
+ chunk_remain = min(blksize, 4);
+ }
+
+ if (host->remain == 0) {
+ if (esdhc_next_sg(host) == 0) {
+ BUG_ON(blksize != 0);
+ return;
+ }
+ buffer = esdhc_sg_to_buffer(host);
+ }
+ }
+}
+
+static void esdhc_transfer_pio(struct esdhc_host *host)
+{
+ u32 mask;
+
+ BUG_ON(!host->data);
+
+ if (host->num_sg == 0)
+ return;
+
+ if (host->data->flags & MMC_DATA_READ)
+ mask = ESDHC_DATA_AVAILABLE;
+ else
+ mask = ESDHC_SPACE_AVAILABLE;
+
+ while (fsl_readl(host->ioaddr + ESDHC_PRESENT_STATE) & mask) {
+ if (host->data->flags & MMC_DATA_READ)
+ esdhc_read_block_pio(host);
+ else
+ esdhc_write_block_pio(host);
+
+ if (host->num_sg == 0)
+ break;
+ }
+
+ DBG("PIO transfer complete.\n");
+ /* Delay necessary when writing large data blocks to SD card */
+ udelay(100);
+}
+
+static void esdhc_prepare_data(struct esdhc_host *host, struct mmc_data *data)
+{
+ u8 count;
+ unsigned blkattr = 0;
+ unsigned target_timeout, current_timeout;
+ unsigned int sysctl;
+
+ WARN_ON(host->data);
+
+ if (data == NULL)
+ return;
+
+ DBG("blksz %04x blks %04x flags %08x",
+ data->blksz, data->blocks, data->flags);
+ DBG("tsac %d ms nsac %d clk",
+ data->timeout_ns / 1000000, data->timeout_clks);
+
+ /* Sanity checks */
+ BUG_ON(data->blksz * data->blocks > 524288);
+ BUG_ON(data->blksz > host->mmc->max_blk_size);
+ BUG_ON(data->blocks > 65535);
+
+ if (host->clock == 0)
+ return;
+
+ /* timeout in us */
+ target_timeout = data->timeout_ns / 1000 +
+ (data->timeout_clks * 1000000) / host->clock;
+
+ /*
+ * Figure out needed cycles.
+ * We do this in steps in order to fit inside a 32 bit int.
+ * The first step is the minimum timeout, which will have a
+ * minimum resolution of 6 bits:
+ * (1) 2^13*1000 > 2^22,
+ * (2) host->timeout_clk < 2^16
+ * =>
+ * (1) / (2) > 2^6
+ */
+ count = 0;
+ host->timeout_clk = host->clock/1000;
+ current_timeout = (1 << 13) * 1000 / host->timeout_clk;
+ while (current_timeout < target_timeout) {
+ count++;
+ current_timeout <<= 1;
+ if (count >= 0xF)
+ break;
+ }
+
+ if (count >= 0xF) {
+ DBG("%s:Timeout requested is too large!\n",
+ mmc_hostname(host->mmc));
+ count = 0xE;
+ }
+
+ if (data->blocks >= 0x50) {
+ DBG("%s:Blocks %x are too large!\n",
+ mmc_hostname(host->mmc),
+ data->blocks);
+ count = 0xE;
+ }
+
+ if ((data->blocks == 1) && (data->blksz >= 0x200)) {
+ DBG("%s:Blocksize %x is too large\n",
+ mmc_hostname(host->mmc),
+ data->blksz);
+ count = 0xE;
+ }
+ count = 0xE;
+
+ sysctl = fsl_readl(host->ioaddr + ESDHC_SYSTEM_CONTROL);
+ sysctl &= (~ESDHC_TIMEOUT_MASK);
+ fsl_writel(host->ioaddr + ESDHC_SYSTEM_CONTROL,
+ sysctl | (count<<ESDHC_TIMEOUT_SHIFT));
+
+ /* Data transfer*/
+ if (host->flags & ESDHC_USE_DMA) {
+ int sg_count;
+ unsigned int wml;
+ unsigned int wml_value;
+ unsigned int timeout;
+
+ /* DMA address eSDHC in Modelo must be 4 bytes aligned */
+ if ((data->sg->offset & 0x3) == 0)
+ host->offset = 0;
+ else
+ host->offset = 0x4 - (data->sg->offset & 0x3);
+
+ sg_count = dma_map_sg(mmc_dev(host->mmc), data->sg,
+ data->sg_len,
+ (data->flags & MMC_DATA_READ)
+ ? DMA_FROM_DEVICE : DMA_TO_DEVICE);
+
+ BUG_ON(sg_count != 1);
+ /* The data in SD card is little endian,
+ the SD controller is big endian */
+ if ((data->flags & MMC_DATA_WRITE) == MMC_DATA_WRITE) {
+ unsigned char *buffer = sg_virt(data->sg);
+ unsigned char *buffer_tx =
+ (unsigned char *)host->dma_tx_buf;
+ int i;
+ /* Each sector is 512 Bytes, write 0x200 sectors */
+ memset(host->dma_tx_buf, 0, ESDHC_DMA_SIZE);
+ for (i = 0; i < data->sg->length; i = i + 4) {
+ *(buffer_tx + i + 3) = *(buffer + i);
+ *(buffer_tx + i + 2) = *(buffer + i + 1);
+ *(buffer_tx + i + 1) = *(buffer + i + 2);
+ *(buffer_tx + i) = *(buffer + i + 3);
+ }
+
+ fsl_writel(host->ioaddr + ESDHC_DMA_ADDRESS,
+ (unsigned long)host->dma_tx_dmahandle);
+ } else {
+ fsl_writel(host->ioaddr + ESDHC_DMA_ADDRESS,
+ sg_dma_address(data->sg) + host->offset);
+ }
+
+ /* Disable the BRR and BWR interrupt */
+ timeout = fsl_readl(host->ioaddr + ESDHC_INT_ENABLE);
+ timeout = timeout & (~(ESDHC_INT_DATA_AVAIL |
+ ESDHC_INT_SPACE_AVAIL));
+ fsl_writel(host->ioaddr + ESDHC_INT_ENABLE, timeout);
+
+ timeout = fsl_readl(host->ioaddr + ESDHC_SIGNAL_ENABLE);
+ timeout = timeout & (~(ESDHC_INT_DATA_AVAIL |
+ ESDHC_INT_SPACE_AVAIL));
+ fsl_writel(host->ioaddr + ESDHC_SIGNAL_ENABLE, timeout);
+
+ wml_value = data->blksz / 4;
+ if (data->flags & MMC_DATA_READ) {
+ /* Read watermask level, max is 0x10*/
+ if (wml_value > 0x10)
+ wml_value = 0x10;
+ wml = (wml_value & ESDHC_WML_MASK) |
+ ((0x10 & ESDHC_WML_MASK)
+ << ESDHC_WML_WRITE_SHIFT);
+ } else {
+ if (wml_value > 0x80)
+ wml_value = 0x80;
+ wml = (0x10 & ESDHC_WML_MASK) |
+ (((wml_value) & ESDHC_WML_MASK)
+ << ESDHC_WML_WRITE_SHIFT);
+ }
+
+ fsl_writel(host->ioaddr + ESDHC_WML, wml);
+ } else {
+ unsigned long timeout;
+
+ host->cur_sg = data->sg;
+ host->num_sg = data->sg_len;
+
+ host->offset = 0;
+ host->remain = host->cur_sg->length;
+
+ timeout = fsl_readl(host->ioaddr + ESDHC_INT_ENABLE);
+ timeout = timeout | ESDHC_INT_DATA_AVAIL
+ | ESDHC_INT_SPACE_AVAIL;
+ fsl_writel(host->ioaddr + ESDHC_INT_ENABLE, timeout);
+
+ timeout = fsl_readl(host->ioaddr + ESDHC_SIGNAL_ENABLE);
+ timeout = timeout | ESDHC_INT_DATA_AVAIL
+ | ESDHC_INT_SPACE_AVAIL;
+ fsl_writel(host->ioaddr + ESDHC_SIGNAL_ENABLE, timeout);
+ }
+
+ /* We do not handle DMA boundaries */
+ blkattr = data->blksz;
+ blkattr |= (data->blocks << 16);
+ fsl_writel(host->ioaddr + ESDHC_BLOCK_ATTR, blkattr);
+ esdhc_dumpregs(host);
+}
+
+static unsigned int esdhc_set_transfer_mode(struct esdhc_host *host,
+ struct mmc_data *data)
+{
+ u32 mode = 0;
+
+ WARN_ON(host->data);
+
+ if (data == NULL)
+ return 0;
+
+ mode = ESDHC_TRNS_BLK_CNT_EN;
+ if (data->blocks > 1) {
+ if (data->flags & MMC_DATA_READ)
+ mode |= ESDHC_TRNS_MULTI | ESDHC_TRNS_ACMD12;
+ else
+ mode |= ESDHC_TRNS_MULTI;
+ }
+ if (data->flags & MMC_DATA_READ)
+ mode |= ESDHC_TRNS_READ;
+ if (host->flags & ESDHC_USE_DMA)
+ mode |= ESDHC_TRNS_DMA;
+
+ return mode;
+}
+
+static void esdhc_finish_data(struct esdhc_host *host)
+{
+ struct mmc_data *data;
+ u16 blocks;
+
+ BUG_ON(!host->data);
+
+ data = host->data;
+ host->data = NULL;
+
+ if (host->flags & ESDHC_USE_DMA) {
+ unsigned char *buffer = sg_virt(data->sg);
+ unsigned char C0, C1, C2, C3;
+ int i;
+ /* Data in SD card is little endian,
+ SD controller is big endian */
+
+ dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
+ (data->flags & MMC_DATA_READ)
+ ? DMA_FROM_DEVICE : DMA_TO_DEVICE);
+ if (((data->flags & MMC_DATA_READ) == MMC_DATA_READ)) {
+ for (i = 0; i < data->sg->length; i = i + 4) {
+ C0 = *(buffer + host->offset + i);
+ C1 = *(buffer + host->offset + i + 1);
+ C2 = *(buffer + host->offset + i + 2);
+ C3 = *(buffer + host->offset + i + 3);
+ *(buffer+i) = C3;
+ *(buffer+i+1) = C2;
+ *(buffer+i+2) = C1;
+ *(buffer+i+3) = C0;
+ }
+ }
+ }
+ /*
+ * Controller doesn't count down when in single block mode.
+ */
+ if ((data->blocks == 1) && (data->error == MMC_ERR_NONE))
+ blocks = 0;
+ else {
+ blocks = fsl_readl(host->ioaddr + ESDHC_BLOCK_ATTR) >> 16;
+ blocks = 0;
+ if (data->flags & MMC_DATA_READ)
+ data->stop = 0;
+ }
+
+ data->bytes_xfered = data->blksz * (data->blocks - blocks);
+
+ if ((data->error == MMC_ERR_NONE) && blocks) {
+ printk(KERN_ERR"%s: Controller signaled completion even "
+ "though there were blocks left.\n",
+ mmc_hostname(host->mmc));
+ data->error = MMC_ERR_FAILED;
+ }
+
+ if ((blocks == 0) && (data->error & MMC_ERR_TIMEOUT)) {
+ printk(KERN_ERR "Controller transmitted completion even "
+ "though there was a timeout error.\n");
+ data->error &= ~MMC_ERR_TIMEOUT;
+ }
+
+ if (data->stop) {
+ DBG("%s data->stop %x\n", __func__, data->stop);
+ /*
+ * The controller needs a reset of internal state machines
+ * upon error conditions.
+ */
+ if (data->error != MMC_ERR_NONE) {
+ printk("%s: The controller needs a "
+ "reset of internal state machines\n",
+ __func__);
+ esdhc_reset(host, ESDHC_RESET_CMD);
+ esdhc_reset(host, ESDHC_RESET_DATA);
+ reset_regs(host);
+ }
+
+ esdhc_send_command(host, data->stop);
+ } else
+ tasklet_schedule(&host->finish_tasklet);
+}
+
+static void esdhc_send_command(struct esdhc_host *host, struct mmc_command *cmd)
+{
+ unsigned int flags;
+ u32 mask;
+ unsigned long timeout;
+
+ WARN_ON(host->cmd);
+
+ /* Wait max 10 ms */
+ timeout = 10;
+
+ mask = ESDHC_CMD_INHIBIT;
+ if ((cmd->data != NULL) || (cmd->flags & MMC_RSP_BUSY))
+ mask |= ESDHC_DATA_INHIBIT;
+
+ /* We shouldn't wait for data inihibit for stop commands, even
+ though they might use busy signaling */
+ if (host->mrq->data && (cmd == host->mrq->data->stop))
+ mask &= ~ESDHC_DATA_INHIBIT;
+
+ while (fsl_readl(host->ioaddr + ESDHC_PRESENT_STATE) & mask) {
+ if (timeout == 0) {
+ printk(KERN_ERR "%s: Controller never released "
+ "inhibit bit(s).\n", mmc_hostname(host->mmc));
+ esdhc_dumpregs(host);
+ cmd->error = MMC_ERR_FAILED;
+ tasklet_schedule(&host->finish_tasklet);
+ return;
+ }
+ timeout--;
+ mdelay(1);
+ }
+
+ mod_timer(&host->timer, jiffies + 15 * HZ);
+
+ host->cmd = cmd;
+
+ esdhc_prepare_data(host, cmd->data);
+
+ fsl_writel(host->ioaddr + ESDHC_ARGUMENT, cmd->arg);
+
+ flags = esdhc_set_transfer_mode(host, cmd->data);
+
+ if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) {
+ printk(KERN_ERR "%s: Unsupported response type!\n",
+ mmc_hostname(host->mmc));
+ cmd->error = MMC_ERR_INVALID;
+ tasklet_schedule(&host->finish_tasklet);
+ return;
+ }
+
+ if (!(cmd->flags & MMC_RSP_PRESENT))
+ flags |= ESDHC_CMD_RESP_NONE;
+ else if (cmd->flags & MMC_RSP_136)
+ flags |= ESDHC_CMD_RESP_LONG;
+ else if (cmd->flags & MMC_RSP_BUSY)
+ flags |= ESDHC_CMD_RESP_SHORT_BUSY;
+ else
+ flags |= ESDHC_CMD_RESP_SHORT;
+
+ if (cmd->flags & MMC_RSP_CRC)
+ flags |= ESDHC_CMD_CRC_EN;
+ if (cmd->flags & MMC_RSP_OPCODE)
+ flags |= ESDHC_CMD_INDEX_EN;
+ if (cmd->data)
+ flags |= ESDHC_CMD_DATA;
+
+ fsl_writel(host->ioaddr + ESDHC_COMMAND,
+ ESDHC_MAKE_CMD(cmd->opcode, flags));
+}
+
+static void esdhc_finish_command(struct esdhc_host *host)
+{
+ int i;
+
+ BUG_ON(host->cmd == NULL);
+
+ if (host->cmd->flags & MMC_RSP_PRESENT) {
+ if (host->cmd->flags & MMC_RSP_136) {
+ /* CRC is stripped so we need to do some shifting. */
+ for (i = 0; i < 4; i++) {
+ host->cmd->resp[i] = fsl_readl(host->ioaddr +
+ ESDHC_RESPONSE + (3-i)*4) << 8;
+ if (i != 3)
+ host->cmd->resp[i] |=
+ (fsl_readl(host->ioaddr
+ + ESDHC_RESPONSE
+ + (2-i)*4) >> 24);
+ }
+ } else
+ host->cmd->resp[0] = fsl_readl(host->ioaddr +
+ ESDHC_RESPONSE);
+ }
+
+ host->cmd->error = MMC_ERR_NONE;
+
+ if (host->cmd->data)
+ host->data = host->cmd->data;
+ else
+ tasklet_schedule(&host->finish_tasklet);
+
+ host->cmd = NULL;
+}
+
+#define MYCLOCK 1
+static void esdhc_set_clock(struct esdhc_host *host, unsigned int clock)
+{
+#if MYCLOCK
+ unsigned long sdrefclk, vco, bestmatch = -1, temp, diff;
+ int dvs, sdclkfs, outdiv;
+ int best_dvs, best_sdclkfs, best_outdiv;
+#else
+ int div, pre_div;
+ unsigned long sys_busclock = SYS_BUSCLOCK;
+#endif
+ unsigned long timeout;
+ u16 clk;
+
+ DBG("esdhc_set_clock %x\n", clock);
+ if (clock == host->clock)
+ return;
+
+ timeout = fsl_readl(host->ioaddr + ESDHC_SYSTEM_CONTROL);
+ timeout = timeout & (~ESDHC_CLOCK_MASK);
+ fsl_writel(host->ioaddr + ESDHC_SYSTEM_CONTROL, timeout);
+
+ if (clock == 0)
+ goto out;
+
+#if MYCLOCK
+ /* TC: The VCO must obtain from u-boot */
+ /*
+ * First set the outdiv3 to min 1, then walk through all to
+ * get closer value with SDCLKDIV and DIV combination
+ */
+ vco = 500000000;
+ MCF_CLOCK_PLL_DR &= 0xFFFF83FF; /* Disable SD Clock */
+
+ for (outdiv = 2; outdiv <= 32; outdiv++) {
+ sdrefclk = vco / outdiv;
+
+ for (sdclkfs = 2; sdclkfs < 257; sdclkfs <<= 1) {
+ for (dvs = 1; dvs < 17; dvs++) {
+ temp = sdrefclk / (sdclkfs * dvs);
+
+ if (temp > clock)
+ diff = temp - clock;
+ else
+ diff = clock - temp;
+
+ if (diff <= bestmatch) {
+ bestmatch = diff;
+ best_outdiv = outdiv;
+ best_sdclkfs = sdclkfs;
+ best_dvs = dvs;
+
+ if (bestmatch == 0)
+ goto end;
+ }
+ }
+ }
+ }
+
+end:
+#ifdef CONFIG_M5441X
+ best_outdiv = 3;
+ best_sdclkfs = 2;
+ best_dvs = 5;
+#endif
+ MCF_CLOCK_PLL_DR |= ((best_outdiv - 1) << 10);
+ clk = ((best_sdclkfs >> 1) << 8) | ((best_dvs - 1) << 4);
+#else
+
+ if (sys_busclock / 16 > clock) {
+ for (pre_div = 1; pre_div < 256; pre_div *= 2) {
+ if ((sys_busclock / pre_div) < (clock*16))
+ break;
+ }
+ } else
+ pre_div = 1;
+
+ for (div = 1; div <= 16; div++) {
+ if ((sys_busclock / (div*pre_div)) <= clock)
+ break;
+ }
+
+ pre_div >>= 1;
+ div -= 1;
+
+ clk = (div << ESDHC_DIVIDER_SHIFT) | (pre_div << ESDHC_PREDIV_SHIFT);
+#endif
+
+ timeout = fsl_readl(host->ioaddr + ESDHC_SYSTEM_CONTROL);
+ timeout = timeout | clk;
+
+ fsl_writel(host->ioaddr + ESDHC_SYSTEM_CONTROL, timeout);
+
+ /* Wait max 10 ms */
+ timeout = 10;
+ while (timeout) {
+ timeout--;
+ mdelay(1);
+ }
+
+ timeout = fsl_readl(host->ioaddr + ESDHC_SYSTEM_CONTROL);
+ timeout = timeout | ESDHC_CLOCK_CARD_EN;
+ fsl_writel(host->ioaddr + ESDHC_SYSTEM_CONTROL, timeout);
+
+ esdhc_dumpregs(host);
+
+out:
+ host->clock = clock;
+ if (host->clock == 0) {
+ timeout = fsl_readl(host->ioaddr + ESDHC_SYSTEM_CONTROL);
+ timeout = timeout | ESDHC_CLOCK_DEFAULT;
+ fsl_writel(host->ioaddr + ESDHC_SYSTEM_CONTROL, timeout);
+ }
+}
+
+static void esdhc_set_power(struct esdhc_host *host, unsigned short power)
+{
+ if (host->power == power)
+ return;
+
+ if (power == (unsigned short)-1)
+ host->power = power;
+}
+
+/*****************************************************************************\
+ * *
+ * MMC callbacks *
+ * *
+\*****************************************************************************/
+
+static void esdhc_request(struct mmc_host *mmc, struct mmc_request *mrq)
+{
+ struct esdhc_host *host;
+ unsigned long flags;
+
+ DBG("esdhc_request\n");
+ host = mmc_priv(mmc);
+
+ spin_lock_irqsave(&host->lock, flags);
+
+ WARN_ON(host->mrq != NULL);
+
+ host->mrq = mrq;
+
+ esdhc_send_command(host, mrq->cmd);
+
+ mmiowb();
+ spin_unlock_irqrestore(&host->lock, flags);
+}
+
+static void esdhc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+ struct esdhc_host *host;
+ unsigned long flags;
+ u32 ctrl, irq_status_ena, irq_signal_ena;
+
+ DBG("ios->power_mode %x, ios->bus_width %x\n",
+ ios->power_mode, ios->bus_width);
+ host = mmc_priv(mmc);
+
+ spin_lock_irqsave(&host->lock, flags);
+
+ /*
+ * Reset the chip on each power off.
+ * Should clear out any weird states.
+ */
+
+ if (ios->power_mode == MMC_POWER_OFF) {
+ fsl_writel(host->ioaddr + ESDHC_SIGNAL_ENABLE, 0);
+ esdhc_init(host);
+ }
+
+ esdhc_set_clock(host, ios->clock);
+
+ if (ios->power_mode == MMC_POWER_OFF)
+ esdhc_set_power(host, -1);
+ else
+ esdhc_set_power(host, ios->vdd);
+
+ ctrl = fsl_readl(host->ioaddr + ESDHC_PROTOCOL_CONTROL);
+
+ if (ios->bus_width == MMC_BUS_WIDTH_4) {
+ ctrl |= ESDHC_CTRL_4BITBUS;
+ host->bus_width = MMC_BUS_WIDTH_4;
+
+ ctrl &= ~ESDHC_CTRL_D3_DETEC;
+
+ /*when change the config of the CD,
+ * will involve card remove interrupt
+ * So try disable the card remove interrupt.
+ */
+ irq_status_ena = fsl_readl(host->ioaddr + ESDHC_INT_ENABLE);
+ irq_status_ena &= ~ESDHC_INT_CARD_REMOVE;
+ fsl_writel(host->ioaddr + ESDHC_INT_ENABLE, irq_status_ena);
+
+ irq_signal_ena = fsl_readl(host->ioaddr + ESDHC_SIGNAL_ENABLE);
+ irq_signal_ena &= ~ESDHC_INT_CARD_REMOVE;
+ fsl_writel(host->ioaddr + ESDHC_SIGNAL_ENABLE, irq_signal_ena);
+
+ DBG("host->card_insert = 0x%x\n", host->card_insert);
+
+
+ } else {
+ ctrl &= ~ESDHC_CTRL_4BITBUS;
+ host->bus_width = MMC_BUS_WIDTH_1;
+ }
+
+ fsl_writel(host->ioaddr + ESDHC_PROTOCOL_CONTROL, ctrl);
+ mmiowb();
+ spin_unlock_irqrestore(&host->lock, flags);
+
+ esdhc_dumpregs(host);
+}
+
+static int esdhc_get_ro(struct mmc_host *mmc)
+{
+ return 0;
+}
+
+static const struct mmc_host_ops esdhc_ops = {
+ .request = esdhc_request,
+ .set_ios = esdhc_set_ios,
+ .get_ro = esdhc_get_ro,
+};
+
+/*****************************************************************************\
+ * *
+ * Tasklets *
+ * *
+\*****************************************************************************/
+
+static void esdhc_tasklet_card(unsigned long param)
+{
+ struct esdhc_host *host;
+
+ host = (struct esdhc_host *)param;
+
+ spin_lock(&host->lock);
+
+ DBG("esdhc_tasklet_card\n");
+ if (!(fsl_readl(host->ioaddr + ESDHC_PRESENT_STATE) &
+ ESDHC_CARD_PRESENT)) {
+ if (host->mrq) {
+ printk(KERN_ERR "%s: Card removed during transfer!\n",
+ mmc_hostname(host->mmc));
+ printk(KERN_ERR "%s: Resetting controller.\n",
+ mmc_hostname(host->mmc));
+
+ esdhc_reset(host, ESDHC_RESET_CMD);
+ esdhc_reset(host, ESDHC_RESET_DATA);
+
+ host->mrq->cmd->error = MMC_ERR_FAILED;
+ tasklet_schedule(&host->finish_tasklet);
+ }
+ host->card_insert = 0;
+ } else {
+ esdhc_reset(host, ESDHC_INIT_CARD);
+ host->card_insert = 1;
+ }
+
+ spin_unlock(&host->lock);
+
+ mmc_detect_change(host->mmc, msecs_to_jiffies(500));
+}
+
+static void esdhc_tasklet_finish(unsigned long param)
+{
+ struct esdhc_host *host;
+ unsigned long flags;
+ struct mmc_request *mrq;
+
+ host = (struct esdhc_host *)param;
+ DBG("esdhc_tasklet_finish\n");
+
+ spin_lock_irqsave(&host->lock, flags);
+
+ del_timer(&host->timer);
+
+ mrq = host->mrq;
+
+ /*
+ * The controller needs a reset of internal state machines
+ * upon error conditions.
+ */
+ if ((mrq->cmd->error != MMC_ERR_NONE) ||
+ (mrq->data && ((mrq->data->error != MMC_ERR_NONE) ||
+ (mrq->data->stop &&
+ (mrq->data->stop->error != MMC_ERR_NONE))))) {
+
+ /* Some controllers need this kick or reset won't work here */
+ if (host->chip->quirks & ESDHC_QUIRK_CLOCK_BEFORE_RESET) {
+ unsigned int clock;
+
+ /* This is to force an update */
+ clock = host->clock;
+ host->clock = 0;
+ esdhc_set_clock(host, clock);
+ }
+
+ if (mrq->cmd->error != MMC_ERR_TIMEOUT) {
+ esdhc_reset(host, ESDHC_RESET_CMD);
+ esdhc_reset(host, ESDHC_RESET_DATA);
+ reset_regs(host);
+ esdhc_dumpregs(host);
+ }
+ }
+
+ host->mrq = NULL;
+ host->cmd = NULL;
+ host->data = NULL;
+
+ spin_unlock_irqrestore(&host->lock, flags);
+
+ mmc_request_done(host->mmc, mrq);
+}
+
+static void esdhc_timeout_timer(unsigned long data)
+{
+ struct esdhc_host *host;
+ unsigned long flags;
+
+ host = (struct esdhc_host *)data;
+ printk(KERN_INFO "esdhc_timeout_timer\n");
+ spin_lock_irqsave(&host->lock, flags);
+
+ if (host->mrq) {
+ if (host->data) {
+ host->data->error = MMC_ERR_TIMEOUT;
+ esdhc_finish_data(host);
+ } else {
+ if (host->cmd)
+ host->cmd->error = MMC_ERR_TIMEOUT;
+ else
+ host->mrq->cmd->error = MMC_ERR_TIMEOUT;
+ tasklet_schedule(&host->finish_tasklet);
+ }
+ }
+
+ mmiowb();
+ fsl_writel(host->ioaddr + ESDHC_INT_STATUS, 0);
+ spin_unlock_irqrestore(&host->lock, flags);
+}
+
+/*****************************************************************************\
+ * *
+ * Interrupt handling *
+ * *
+\*****************************************************************************/
+
+static void esdhc_cmd_irq(struct esdhc_host *host, u32 intmask)
+{
+ BUG_ON(intmask == 0);
+
+ if (!host->cmd) {
+ printk(KERN_ERR "%s: Got command interrupt even though no "
+ "command operation was in progress.\n",
+ mmc_hostname(host->mmc));
+ esdhc_dumpregs(host);
+ return;
+ }
+
+ if (intmask & ESDHC_INT_TIMEOUT) {
+ host->cmd->error = MMC_ERR_TIMEOUT;
+ DBG("esdhc_cmd_irq MMC_ERR_TIMEOUT\n");
+ tasklet_schedule(&host->finish_tasklet);
+ } else if (intmask & ESDHC_INT_RESPONSE)
+ esdhc_finish_command(host);
+ else {
+ if (intmask & ESDHC_INT_CRC)
+ host->cmd->error = MMC_ERR_BADCRC;
+ else if (intmask & (ESDHC_INT_END_BIT | ESDHC_INT_INDEX))
+ host->cmd->error = MMC_ERR_FAILED;
+ else
+ host->cmd->error = MMC_ERR_INVALID;
+
+ tasklet_schedule(&host->finish_tasklet);
+ }
+}
+
+static void esdhc_data_irq(struct esdhc_host *host, u32 intmask)
+{
+ BUG_ON(intmask == 0);
+ if (!host->data) {
+ /*
+ * A data end interrupt is sent together with the response
+ * for the stop command.
+ */
+ if ((intmask & ESDHC_INT_DATA_END) ||
+ (intmask & ESDHC_INT_DMA_END)) {
+ return;
+ }
+ DBG("%s: Got data interrupt even though no "
+ "data operation was in progress.\n",
+ mmc_hostname(host->mmc));
+ esdhc_dumpregs(host);
+
+ return;
+ }
+
+ if (intmask & ESDHC_INT_DATA_TIMEOUT)
+ host->data->error = MMC_ERR_TIMEOUT;
+ else if (intmask & ESDHC_INT_DATA_CRC)
+ host->data->error = MMC_ERR_BADCRC;
+ else if (intmask & ESDHC_INT_DATA_END_BIT)
+ host->data->error = MMC_ERR_FAILED;
+
+ if (host->data->error != MMC_ERR_NONE) {
+ esdhc_finish_data(host);
+ } else {
+ if (intmask & (ESDHC_INT_DATA_AVAIL | ESDHC_INT_SPACE_AVAIL))
+ esdhc_transfer_pio(host);
+ /*
+ * We currently don't do anything fancy with DMA
+ * boundaries, but as we can't disable the feature
+ * we need to at least restart the transfer.
+ */
+ if (intmask & ESDHC_INT_DMA_END)
+ fsl_writel(host->ioaddr + ESDHC_DMA_ADDRESS,
+ fsl_readl(host->ioaddr + ESDHC_DMA_ADDRESS));
+ if (intmask & ESDHC_INT_DATA_END)
+ esdhc_finish_data(host);
+ }
+}
+
+static irqreturn_t esdhc_detect_irq(int irq, void *dev_id)
+{
+ irqreturn_t result;
+ struct esdhc_host *host = dev_id;
+ u8 irq_status = 0;
+
+ spin_lock(&host->lock);
+
+ irq_status = MCF_EPORT_EPPDR & 0x2;
+ DBG("***Extern IRQ %x %x %x %x %x %x\n", MCF_EPORT_EPPAR,
+ MCF_EPORT_EPDDR, MCF_EPORT_EPDR, MCF_EPORT_EPFR,
+ MCF_EPORT_EPIER, MCF_EPORT_EPPDR);
+#if defined(CONFIG_ESDHC_DETECT_USE_EXTERN_IRQ1)
+ MCF_EPORT_EPIER = MCF_EPORT_EPIER & (~MCF_EPORT_EPIER_EPIE1);
+#elif defined(CONFIG_ESDHC_DETECT_USE_EXTERN_IRQ7)
+ MCF_EPORT_EPIER = MCF_EPORT_EPIER & (~MCF_EPORT_EPIER_EPIE7);
+#else
+ MCF_EPORT_EPIER = MCF_EPORT_EPIER & (~MCF_EPORT_EPIER_EPIE7);
+#endif
+ if (irq_status == 0x0) {
+ DBG("*** Card insert interrupt Extern IRQ\n");
+ esdhc_reset(host, ESDHC_INIT_CARD);
+ host->card_insert = 1;
+ } else /*irq_status == 0x2) */{
+ DBG("*** Card removed interrupt Extern IRQ\n");
+ if (host->mrq) {
+ printk(KERN_ERR "%s: Card removed during transfer!\n",
+ mmc_hostname(host->mmc));
+ printk(KERN_ERR "%s: Resetting controller.\n",
+ mmc_hostname(host->mmc));
+
+ esdhc_reset(host, ESDHC_RESET_CMD);
+ esdhc_reset(host, ESDHC_RESET_DATA);
+
+ host->mrq->cmd->error = MMC_ERR_FAILED;
+ tasklet_schedule(&host->finish_tasklet);
+ }
+ host->card_insert = 0;
+ }
+
+ mmc_detect_change(host->mmc, msecs_to_jiffies(500));
+#if defined(CONFIG_ESDHC_DETECT_USE_EXTERN_IRQ1)
+ MCF_EPORT_EPPAR = MCF_EPORT_EPPAR | MCF_EPORT_EPPAR_EPPA1_BOTH;
+ MCF_EPORT_EPIER = MCF_EPORT_EPIER | MCF_EPORT_EPIER_EPIE1;
+ MCF_EPORT_EPFR = MCF_EPORT_EPFR | MCF_EPORT_EPFR_EPF1;
+#elif defined(CONFIG_ESDHC_DETECT_USE_EXTERN_IRQ7)
+ MCF_EPORT_EPPAR = MCF_EPORT_EPPAR | MCF_EPORT_EPPAR_EPPA7_BOTH;
+ MCF_EPORT_EPIER = MCF_EPORT_EPIER | MCF_EPORT_EPIER_EPIE7;
+ MCF_EPORT_EPFR = MCF_EPORT_EPFR | MCF_EPORT_EPFR_EPF7;
+#else
+ MCF_EPORT_EPPAR = MCF_EPORT_EPPAR | MCF_EPORT_EPPAR_EPPA7_BOTH;
+ MCF_EPORT_EPIER = MCF_EPORT_EPIER | MCF_EPORT_EPIER_EPIE7;
+ MCF_EPORT_EPFR = MCF_EPORT_EPFR | MCF_EPORT_EPFR_EPF7;
+#endif
+ DBG("***Extern IRQ return %x %x %x %x %x %x\n", MCF_EPORT_EPPAR,
+ MCF_EPORT_EPDDR, MCF_EPORT_EPDR, MCF_EPORT_EPFR,
+ MCF_EPORT_EPIER, MCF_EPORT_EPPDR);
+
+ result = IRQ_HANDLED;
+ spin_unlock(&host->lock);
+
+ return result;
+}
+
+static irqreturn_t esdhc_irq(int irq, void *dev_id)
+{
+ irqreturn_t result;
+ struct esdhc_host *host = dev_id;
+ u32 status;
+
+ spin_lock(&host->lock);
+
+ status = fsl_readl(host->ioaddr + ESDHC_INT_STATUS);
+
+ if (!status || status == 0xffffffff) {
+ result = IRQ_NONE;
+ goto out;
+ }
+
+ if (status & ESDHC_INT_CMD_MASK) {
+ fsl_writel(host->ioaddr + ESDHC_INT_STATUS,
+ status & ESDHC_INT_CMD_MASK);
+ esdhc_cmd_irq(host, status & ESDHC_INT_CMD_MASK);
+ }
+
+ if (status & ESDHC_INT_DATA_MASK) {
+ fsl_writel(host->ioaddr + ESDHC_INT_STATUS,
+ status & ESDHC_INT_DATA_MASK);
+ esdhc_data_irq(host, status & ESDHC_INT_DATA_MASK);
+ }
+
+ status &= ~(ESDHC_INT_CMD_MASK | ESDHC_INT_DATA_MASK);
+
+ if (status) {
+ printk(KERN_ERR "%s: Unexpected interrupt 0x%08x.\n",
+ mmc_hostname(host->mmc), status);
+ esdhc_dumpregs(host);
+
+ fsl_writel(host->ioaddr + ESDHC_INT_STATUS, status);
+ }
+
+ result = IRQ_HANDLED;
+
+ mmiowb();
+out:
+ spin_unlock(&host->lock);
+
+ return result;
+}
+
+/*****************************************************************************\
+ * *
+ * Suspend/resume *
+ * *
+\*****************************************************************************/
+
+#ifdef CONFIG_PM
+
+static int esdhc_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct esdhc_chip *chip;
+ int i, ret;
+
+ chip = platform_get_drvdata(pdev);
+ if (!chip)
+ return 0;
+
+ DBG("Suspending...");
+
+ for (i = 0; i < chip->num_slots; i++) {
+ if (!chip->hosts[i])
+ continue;
+ ret = mmc_suspend_host(chip->hosts[i]->mmc);
+ if (ret) {
+ for (i--; i >= 0; i--)
+ mmc_resume_host(chip->hosts[i]->mmc);
+ return ret;
+ }
+ }
+
+ for (i = 0; i < chip->num_slots; i++) {
+ if (!chip->hosts[i])
+ continue;
+ free_irq(chip->hosts[i]->irq, chip->hosts[i]);
+ }
+
+ return 0;
+}
+
+static int esdhc_resume(struct platform_device *pdev)
+{
+ struct esdhc_chip *chip;
+ int i, ret;
+
+ chip = platform_get_drvdata(pdev);
+ if (!chip)
+ return 0;
+
+ DBG("Resuming...");
+
+ for (i = 0; i < chip->num_slots; i++) {
+ if (!chip->hosts[i])
+ continue;
+ ret = request_irq(chip->hosts[i]->irq, esdhc_irq,
+ IRQF_SHARED, chip->hosts[i]->slot_descr,
+ chip->hosts[i]);
+ if (ret)
+ return ret;
+ esdhc_init(chip->hosts[i]);
+ mmiowb();
+ ret = mmc_resume_host(chip->hosts[i]->mmc);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+#else
+
+#define esdhc_suspend NULL
+#define esdhc_resume NULL
+
+#endif
+
+/*****************************************************************************\
+ * *
+ * Device probing/removal *
+ * *
+\*****************************************************************************/
+
+static int esdhc_probe_slot(struct platform_device *pdev, int slot)
+{
+ int ret;
+ unsigned int version;
+ struct esdhc_chip *chip;
+ struct mmc_host *mmc;
+ struct esdhc_host *host;
+ struct resource *res;
+
+ unsigned int caps;
+
+ chip = platform_get_drvdata(pdev);
+ BUG_ON(!chip);
+
+ mmc = mmc_alloc_host(sizeof(struct esdhc_host), &(pdev->dev));
+ if (!mmc) {
+ printk(KERN_ERR "%s mmc_alloc_host failed %x\n",
+ __func__, (unsigned int)mmc);
+ return -ENOMEM;
+ }
+
+ host = mmc_priv(mmc);
+ host->mmc = mmc;
+
+ host->chip = chip;
+ chip->hosts[slot] = host;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (res == NULL) {
+ printk(KERN_ERR "%s platform_get_resource MEM failed %x\n",
+ __func__, (unsigned int)res);
+ goto free;
+ }
+
+ host->addr = res->start;
+ host->size = res->end - res->start + 1;
+
+ host->irq = platform_get_irq(pdev, 0);
+ if (host->irq <= 0) {
+ printk(KERN_ERR "%s platform_get_irq failed %x\n",
+ __func__, host->irq);
+ goto free;
+ }
+
+ printk(KERN_INFO "slot %d at 0x%08lx, irq %d\n",
+ slot, host->addr, host->irq);
+
+ snprintf(host->slot_descr, 20, "esdhc:slot%d", slot);
+
+ ret = (int)request_mem_region(host->addr, host->size, DRIVER_NAME);
+ if (!ret) {
+ ret = -EBUSY;
+ printk(KERN_INFO "%s request_mem_region failed %x\n",
+ __func__, (unsigned int)res);
+ goto release;
+ }
+
+ host->ioaddr = ioremap_nocache(host->addr, host->size);
+ if (!host->ioaddr) {
+ ret = -ENOMEM;
+ printk(KERN_INFO "%s ioremap_nocache failed %x\n",
+ __func__, (unsigned int)host->ioaddr);
+ goto release;
+ }
+
+ esdhc_reset(host, ESDHC_RESET_ALL);
+
+ version = fsl_readl(host->ioaddr + ESDHC_HOST_VERSION);
+ if ((version & 1) != 0x01)
+ printk(KERN_INFO "%s: Unknown controller version (%d). "
+ "You may experience problems.\n", host->slot_descr,
+ version);
+
+ caps = fsl_readl(host->ioaddr + ESDHC_CAPABILITIES);
+ printk(KERN_INFO "%s caps %x %x\n",
+ __func__, caps, (unsigned int)MCF_ESDHC_HOSTCAPBLT);
+
+#if defined(CONFIG_ESDHC_FORCE_PIO)
+ debug_nodma = 1;
+#endif
+ if (debug_nodma)
+ DBG("DMA forced off\n");
+ else if (debug_forcedma) {
+ DBG("DMA forced on\n");
+ host->flags |= ESDHC_USE_DMA;
+ } else if (chip->quirks & ESDHC_QUIRK_FORCE_DMA) {
+ DBG("Controller force DMA capability\n");
+ host->flags |= ESDHC_USE_DMA;
+ } else if (!(caps & ESDHC_CAN_DO_DMA))
+ DBG("Controller doesn't have DMA capability\n");
+ else {
+ host->flags |= ESDHC_USE_DMA;
+ DBG("Controller have DMA capability\n");
+ }
+
+ /*
+ * Set host parameters.
+ */
+#ifdef CONFIG_MPC5441X
+ host->max_clk = 17000000;
+#else
+ host->max_clk = 25000000;
+#endif
+
+ /* if 4 bit , freq can be 50MHz */
+ mmc->ops = &esdhc_ops;
+ mmc->f_min = 400000;
+ mmc->f_max = min((int)host->max_clk, 50000000);
+
+ mmc->caps = MMC_CAP_4_BIT_DATA;
+
+ mmc->ocr_avail = 0;
+ if (caps & ESDHC_CAN_VDD_330)
+ mmc->ocr_avail |= MMC_VDD_32_33|MMC_VDD_33_34;
+ if (caps & ESDHC_CAN_VDD_300)
+ mmc->ocr_avail |= MMC_VDD_29_30|MMC_VDD_30_31;
+ if (caps & ESDHC_CAN_VDD_180)
+ mmc->ocr_avail |= MMC_VDD_165_195;
+
+ if (mmc->ocr_avail == 0) {
+ printk(KERN_INFO "%s: Hardware doesn't report any "
+ "support voltages.\n", host->slot_descr);
+ ret = -ENODEV;
+ goto unmap;
+ }
+
+ spin_lock_init(&host->lock);
+
+ /*
+ * Maximum number of segments. Hardware cannot do scatter lists.
+ */
+ if (host->flags & ESDHC_USE_DMA)
+ mmc->max_segs = 1;
+ else
+ mmc->max_segs = 16;
+
+ /*
+ * Maximum number of sectors in one transfer. Limited by DMA boundary
+ * size (512KiB).
+ */
+ mmc->max_req_size = 524288;
+
+ /*
+ * Maximum segment size. Could be one segment with the maximum number
+ * of bytes.
+ */
+ mmc->max_seg_size = mmc->max_req_size;
+
+ /*
+ * Maximum block size. This varies from controller to controller and
+ * is specified in the capabilities register.
+ */
+ mmc->max_blk_size = (caps & ESDHC_MAX_BLOCK_MASK) >>
+ ESDHC_MAX_BLOCK_SHIFT;
+ if (mmc->max_blk_size > 3) {
+ printk(KERN_INFO "%s: Invalid maximum block size.\n",
+ host->slot_descr);
+ ret = -ENODEV;
+ goto unmap;
+ }
+ mmc->max_blk_size = 512 << mmc->max_blk_size;
+
+ /*
+ * Maximum block count.
+ */
+ mmc->max_blk_count = /*65535*/0x80;
+
+ /*
+ * Init tasklets.
+ */
+ tasklet_init(&host->card_tasklet,
+ esdhc_tasklet_card, (unsigned long)host);
+ tasklet_init(&host->finish_tasklet,
+ esdhc_tasklet_finish, (unsigned long)host);
+
+ setup_timer(&host->timer, esdhc_timeout_timer, (unsigned long)host);
+
+ esdhc_init(host);
+
+ esdhc_dumpregs(host);
+
+ ret = request_irq(host->irq, esdhc_irq, IRQF_DISABLED,
+ host->slot_descr, host);
+ if (ret) {
+ printk(KERN_INFO "%s: request irq fail %x\n", __func__, ret);
+ goto untasklet;
+ }
+
+ ret = request_irq(card_detect_extern_irq,
+ esdhc_detect_irq, IRQF_DISABLED,
+ host->slot_descr, host);
+ if (ret) {
+ printk(KERN_INFO "%s: request irq fail %x\n", __func__, ret);
+ goto untasklet1;
+ }
+
+ mmiowb();
+
+ ret = mmc_add_host(mmc);
+ if (ret) {
+ printk(KERN_INFO "%s: mmc_add_host fail %x\n", __func__, ret);
+ goto unaddhost;
+ }
+
+ printk(KERN_INFO "%s: ESDHC at 0x%08lx irq %d %s\n", mmc_hostname(mmc),
+ host->addr, host->irq,
+ (host->flags & ESDHC_USE_DMA) ? "DMA" : "PIO");
+
+#ifdef ESDHC_DMA_KMALLOC
+ host->dma_tx_buf = kmalloc(ESDHC_DMA_SIZE, GFP_DMA);
+ host->dma_tx_dmahandle = virt_to_phys(host->dma_tx_buf);
+#else
+ host->dma_tx_buf = dma_alloc_coherent(NULL, ESDHC_DMA_SIZE,
+ &host->dma_tx_dmahandle, GFP_DMA|GFP_KERNEL);
+#endif
+
+ if (((unsigned int)host->dma_tx_buf == 0) ||
+ ((unsigned int)host->dma_tx_dmahandle == 0))
+ printk(KERN_ERR "%s DMA alloc error\n", __func__);
+
+ return 0;
+
+unaddhost:
+ free_irq(card_detect_extern_irq, host);
+untasklet1:
+ free_irq(host->irq, host);
+untasklet:
+ tasklet_kill(&host->card_tasklet);
+ tasklet_kill(&host->finish_tasklet);
+unmap:
+ iounmap(host->ioaddr);
+release:
+ release_mem_region(host->addr, host->size);
+free:
+ mmc_free_host(mmc);
+
+ return ret;
+}
+
+static void esdhc_remove_slot(struct platform_device *pdev, int slot)
+{
+ struct esdhc_chip *chip;
+ struct mmc_host *mmc;
+ struct esdhc_host *host;
+
+ chip = platform_get_drvdata(pdev);
+ host = chip->hosts[slot];
+ mmc = host->mmc;
+
+ chip->hosts[slot] = NULL;
+
+ mmc_remove_host(mmc);
+
+ esdhc_reset(host, ESDHC_RESET_ALL);
+
+ free_irq(card_detect_extern_irq, host);
+
+ free_irq(host->irq, host);
+
+ del_timer_sync(&host->timer);
+
+ tasklet_kill(&host->card_tasklet);
+ tasklet_kill(&host->finish_tasklet);
+
+ iounmap(host->ioaddr);
+
+ release_mem_region(host->addr, host->size);
+
+ mmc_free_host(mmc);
+ DBG("%s: Exit....\n", __func__);
+}
+
+static int __init esdhc_probe(struct platform_device *pdev)
+{
+ int ret, i;
+ u8 slots;
+ struct esdhc_chip *chip;
+
+ BUG_ON(pdev == NULL);
+
+ /* Slew Rate */
+ MCF_GPIO_SRCR_SDHC = 3;
+ MCF_GPIO_SRCR_IRQ0 = 3;
+
+ /* Port Configuration */
+ MCF_GPIO_PAR_ESDHCH = 0xFF; /* DAT[3:0] */
+ MCF_GPIO_PAR_ESDHCL = 0x0F; /* CMD, CLK */
+
+ MCF_ESDHC_VSR = 2; /* disabled adma and set 3.0V */
+
+ MCF_INTC2_ICR31 = 2; /* SDHC irqstat */
+#if defined(CONFIG_ESDHC_DETECT_USE_EXTERN_IRQ1)
+ /*this is irq1 hardware work round*/
+ MCF_GPIO_PAR_IRQ0H |= 0x3;
+
+ MCF_EPORT_EPPAR = MCF_EPORT_EPPAR | MCF_EPORT_EPPAR_EPPA1_BOTH;
+ MCF_EPORT_EPIER = MCF_EPORT_EPIER | MCF_EPORT_EPIER_EPIE1;
+
+ MCF_INTC0_ICR1 = 7; /* IRQ1 */
+ DBG("MCF_INTC0_ICR1 %x MCF_EPORT_EPPAR %x "
+ "MCF_EPORT_EPFR %x MCF_EPORT_EPIER %x "
+ "MCF_INTC0_IMRL %x MCF_INTC0_INTFRCL %x "
+ "MCF_INTC0_IPRL %x\n",
+ MCF_INTC0_ICR1, MCF_EPORT_EPPAR, MCF_EPORT_EPFR,
+ MCF_EPORT_EPIER, MCF_INTC0_IMRL, MCF_INTC0_INTFRCL,
+ MCF_INTC0_IPRL);
+#elif defined(CONFIG_ESDHC_DETECT_USE_EXTERN_IRQ7)
+ MCF_GPIO_PAR_IRQ0H |= MCF_GPIO_PAR_IRQH_IRQ7;
+
+ MCF_EPORT_EPPAR = MCF_EPORT_EPPAR | MCF_EPORT_EPPAR_EPPA7_BOTH;
+ MCF_EPORT_EPIER = MCF_EPORT_EPIER | MCF_EPORT_EPIER_EPIE7;
+
+ MCF_INTC0_ICR7 = 2; /* IRQ7 */
+ DBG("MCF_INTC0_ICR7 %x MCF_EPORT_EPPAR %x\n",
+ MCF_INTC0_ICR7, MCF_EPORT_EPPAR);
+#else
+ MCF_GPIO_PAR_IRQ0H |= MCF_GPIO_PAR_IRQH_IRQ7;
+
+ MCF_EPORT_EPPAR = MCF_EPORT_EPPAR | MCF_EPORT_EPPAR_EPPA7_BOTH;
+ MCF_EPORT_EPIER = MCF_EPORT_EPIER | MCF_EPORT_EPIER_EPIE7;
+
+ MCF_INTC0_ICR7 = 2; /* IRQ7 */
+ DBG("MCF_INTC0_ICR1 %x MCF_EPORT_EPPAR %x\n",
+ MCF_INTC0_ICR7, MCF_EPORT_EPPAR);
+#endif
+
+ slots = ESDHC_SLOTS_NUMBER;
+ DBG("found %d slot(s)\n", slots);
+ if (slots == 0) {
+ printk(KERN_INFO "%s: slot err %d\n", __func__, slots);
+ return -ENODEV;
+ }
+
+ chip = kmalloc(sizeof(struct esdhc_chip) +
+ sizeof(struct esdhc_host *) * slots, GFP_KERNEL);
+ if (!chip) {
+ ret = -ENOMEM;
+ printk(KERN_ERR "%s: kmalloc fail %x\n", __func__,
+ (unsigned int)chip);
+ goto err;
+ }
+
+ memset(chip, 0,
+ sizeof(struct esdhc_chip) +
+ sizeof(struct esdhc_host *) * slots);
+
+ chip->pdev = pdev;
+ chip->quirks = ESDHC_QUIRK_NO_CARD_NO_RESET;
+
+ if (debug_quirks)
+ chip->quirks = debug_quirks;
+
+ chip->num_slots = slots;
+ platform_set_drvdata(pdev, chip);
+
+ for (i = 0; i < slots; i++) {
+ ret = esdhc_probe_slot(pdev, i);
+ if (ret) {
+ for (i--; i >= 0; i--)
+ esdhc_remove_slot(pdev, i);
+ goto free;
+ }
+ }
+
+ return 0;
+
+free:
+ platform_set_drvdata(pdev, NULL);
+ kfree(chip);
+
+err:
+ return ret;
+}
+
+static int esdhc_remove(struct platform_device *pdev)
+{
+ int i;
+ struct esdhc_chip *chip;
+
+ chip = platform_get_drvdata(pdev);
+
+ if (chip) {
+ for (i = 0; i < chip->num_slots; i++)
+ esdhc_remove_slot(pdev, i);
+
+ platform_set_drvdata(pdev, NULL);
+
+ kfree(chip);
+ }
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+static struct platform_driver esdhc_driver = {
+ .probe = esdhc_probe,
+ .remove = esdhc_remove,
+ .suspend = esdhc_suspend,
+ .resume = esdhc_resume,
+ .driver = {
+ .name = DRIVER_NAME,
+ .owner = THIS_MODULE,
+ },
+};
+
+/*****************************************************************************\
+ * *
+ * Driver init/exit *
+ * *
+\*****************************************************************************/
+
+static int __init esdhc_drv_init(void)
+{
+ printk(KERN_INFO DRIVER_NAME
+ ": Freescale Enhanced Secure Digital Host"
+ " Controller driver\n");
+
+ return platform_driver_register(&esdhc_driver);
+}
+
+static void __exit esdhc_drv_exit(void)
+{
+ printk(KERN_INFO DRIVER_NAME
+ ": Freescale Enhanced Secure Digital Host"
+ " Controller driver exit\n");
+ platform_driver_unregister(&esdhc_driver);
+}
+
+module_init(esdhc_drv_init);
+module_exit(esdhc_drv_exit);
+
+module_param(debug_nodma, uint, 0444);
+module_param(debug_forcedma, uint, 0444);
+module_param(debug_quirks, uint, 0444);
+
+MODULE_AUTHOR("Chenghu Wu<b16972@freescale.com>");
+MODULE_DESCRIPTION("Enhanced Secure Digital Host Controller driver");
+MODULE_LICENSE("GPL");
+
+MODULE_PARM_DESC(debug_nodma, "Forcefully disable DMA transfers.");
+MODULE_PARM_DESC(debug_forcedma, "Forcefully enable DMA transfers.");
+MODULE_PARM_DESC(debug_quirks, "Force certain quirks.");
--- /dev/null
+++ b/drivers/mmc/host/esdhc.h
@@ -0,0 +1,310 @@
+/*
+ * Copyright (C) 2008-2011 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Author: Chenghu Wu <b16972@freescale.com>
+ * Xiaobo Xie <X.Xie@freescale.com>
+ *
+ * Based on mpc837x/driver/mmc/host/esdhc.c done by Xiaobo Xie
+ * Ported to Coldfire platform by Chenghu Wu
+ *
+ * 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.
+ */
+#ifndef ESDHC_H
+#define ESDHC_H
+
+#define MMC_ERR_NONE 0
+#define MMC_ERR_TIMEOUT 1
+#define MMC_ERR_BADCRC 2
+#define MMC_ERR_FIFO 3
+#define MMC_ERR_FAILED 4
+#define MMC_ERR_INVALID 5
+
+#define MCF_CLOCK_PLL_DR (*(volatile unsigned long *)(0xFC0C0004))
+#define MCF_ESDHC_HOSTCAPBLT (*(volatile unsigned long *)(0xFC0CC040))
+#define MCF_ESDHC_ADMAESR (*(volatile unsigned long *)(0xFC0CC054))
+#define MCF_ESDHC_ADMASAR (*(volatile unsigned long *)(0xFC0CC058))
+#define MCF_ESDHC_VSR (*(volatile unsigned long *)(0xFC0CC0C0))
+#define MCF_ESDHC_HOSTVER (*(volatile unsigned long *)(0xFC0CC0FC))
+/*
+ * Controller registers (Big Endian)
+ */
+
+#define MCF_GPIO_PAR_SDHC_DATA3 0x20
+#define MCF_GPIO_PAR_SDHC_DATA2 0x10
+#define MCF_GPIO_PAR_SDHC_DATA1 0x08
+#define MCF_GPIO_PAR_SDHC_DATA0 0x04
+#define MCF_GPIO_PAR_SDHC_CMD 0x02
+#define MCF_GPIO_PAR_SDHC_CLK 0x01
+
+
+#define MCF_GPIO_SRCR_SDHC_LOWEST 0x00
+#define MCF_GPIO_SRCR_SDHC_LOWE 0x01
+#define MCF_GPIO_SRCR_SDHC_HIGH 0x02
+#define MCF_GPIO_SRCR_SDHC_HIGHEST 0x03
+
+
+#define MCF_GPIO_PCRL_SDHC_DATA3 0x80
+#define MCF_GPIO_PCRL_SDHC_DATA2 0x40
+#define MCF_GPIO_PCRL_SDHC_DATA1 0x20
+#define MCF_GPIO_PCRL_SDHC_DATA0 0x10
+#define MCF_GPIO_PCRL_SDHC_CMD 0x08
+#define MCF_GPIO_PCRL_SDHC_CLK 0x04
+
+#define MCF_INT_SDHC 63
+/* DMA System Address Register */
+#define ESDHC_DMA_ADDRESS 0x00
+
+/* Block Attributes Register */
+#define ESDHC_BLOCK_ATTR 0x04
+#define ESDHC_BLOCK_SIZE_MASK 0x00000fff
+#define ESDHC_BLCOK_CNT_MASK 0xffff0000
+#define ESDHC_MAKE_BLKSZ(dma, blksz) (((dma & 0x7) << 12) | (blksz & 0xFFF))
+
+/* Command Argument */
+#define ESDHC_ARGUMENT 0x08
+
+/* Transfer Type Register */
+#define ESDHC_COMMAND 0x0C
+
+#define ESDHC_TRNS_DMA 0x00000001
+#define ESDHC_TRNS_BLK_CNT_EN 0x00000002
+#define ESDHC_TRNS_ACMD12 0x00000004
+#define ESDHC_TRNS_READ 0x00000010
+#define ESDHC_TRNS_MULTI 0x00000020
+
+#define ESDHC_CMD_RESP_MASK 0x00030000
+#define ESDHC_CMD_CRC_EN 0x00080000
+#define ESDHC_CMD_INDEX_EN 0x00100000
+#define ESDHC_CMD_DATA 0x00200000
+#define ESDHC_CMD_TYPE_MASK 0x00c00000
+#define ESDHC_CMD_INDEX 0x3f000000
+
+#define ESDHC_CMD_RESP_NONE 0x00000000
+#define ESDHC_CMD_RESP_LONG 0x00010000
+#define ESDHC_CMD_RESP_SHORT 0x00020000
+#define ESDHC_CMD_RESP_SHORT_BUSY 0x00030000
+
+#define ESDHC_MAKE_CMD(c, f) (((c & 0xff) << 24) | (f & 0xfb0037))
+
+/* Response Register */
+#define ESDHC_RESPONSE 0x10
+
+/* Buffer Data Port Register */
+#define ESDHC_BUFFER 0x20
+
+/* Present State Register */
+#define ESDHC_PRESENT_STATE 0x24
+#define ESDHC_CMD_INHIBIT 0x00000001
+#define ESDHC_DATA_INHIBIT 0x00000002
+#define ESDHC_DOING_WRITE 0x00000100
+#define ESDHC_DOING_READ 0x00000200
+#define ESDHC_SPACE_AVAILABLE 0x00000400
+#define ESDHC_DATA_AVAILABLE 0x00000800
+#define ESDHC_CARD_PRESENT 0x00010000
+#define ESDHC_WRITE_PROTECT 0x00080000
+
+/* Protocol control Register */
+#define ESDHC_PROTOCOL_CONTROL 0x28
+
+#define ESDHC_CTRL_BUS_MASK 0x00000006
+#define ESDHC_CTRL_4BITBUS 0x00000002
+#define ESDHC_CTRL_D3_DETEC 0x00000008
+#define ESDHC_CTRL_DTCT_EN 0x00000080
+#define ESDHC_CTRL_DTCT_STATUS 0x00000040
+#define ESDHC_CTRL_WU_CRM 0x04000000
+#define ESDHC_CTRL_WU_CINS 0x02000000
+#define ESDHC_CTRL_WU_CINT 0x01000000
+
+/* System Control Register */
+#define ESDHC_SYSTEM_CONTROL 0x2C
+
+#define ESDHC_CLOCK_MASK 0x0000fff0
+#define ESDHC_CLOCK_DEFAULT 0x00008000
+#define ESDHC_PREDIV_SHIFT 8
+#define ESDHC_DIVIDER_SHIFT 4
+#define ESDHC_CLOCK_CARD_EN 0x00000004
+#define ESDHC_CLOCK_INT_STABLE 0x00000002
+#define ESDHC_CLOCK_INT_EN 0x00000001
+
+#define ESDHC_TIMEOUT_MASK 0x000f0000
+#define ESDHC_TIMEOUT_SHIFT 16
+
+#define ESDHC_RESET_SHIFT 24
+#define ESDHC_RESET_ALL 0x01
+#define ESDHC_RESET_CMD 0x02
+#define ESDHC_RESET_DATA 0x04
+#define ESDHC_INIT_CARD 0x08
+
+/* Interrupt Register */
+#define ESDHC_INT_STATUS 0x30
+#define ESDHC_INT_ENABLE 0x34
+#define ESDHC_SIGNAL_ENABLE 0x38
+
+#define ESDHC_INT_RESPONSE 0x00000001
+#define ESDHC_INT_DATA_END 0x00000002
+#define ESDHC_INT_DMA_END 0x00000008
+#define ESDHC_INT_SPACE_AVAIL 0x00000010
+#define ESDHC_INT_DATA_AVAIL 0x00000020
+#define ESDHC_INT_CARD_INSERT 0x00000040
+#define ESDHC_INT_CARD_REMOVE 0x00000080
+#define ESDHC_INT_CARD_INT 0x00000100
+
+#define ESDHC_INT_TIMEOUT 0x00010000
+#define ESDHC_INT_CRC 0x00020000
+#define ESDHC_INT_END_BIT 0x00040000
+#define ESDHC_INT_INDEX 0x00080000
+#define ESDHC_INT_DATA_TIMEOUT 0x00100000
+#define ESDHC_INT_DATA_CRC 0x00200000
+#define ESDHC_INT_DATA_END_BIT 0x00400000
+#define ESDHC_INT_ACMD12ERR 0x01000000
+#define ESDHC_INT_DMAERR 0x10000000
+
+#define ESDHC_INT_NORMAL_MASK 0x00007FFF
+#define ESDHC_INT_ERROR_MASK 0xFFFF8000
+
+#define ESDHC_INT_CMD_MASK (ESDHC_INT_RESPONSE | ESDHC_INT_TIMEOUT | \
+ ESDHC_INT_CRC | ESDHC_INT_END_BIT | ESDHC_INT_INDEX)
+#define ESDHC_INT_DATA_MASK (ESDHC_INT_DATA_END | ESDHC_INT_DMA_END | \
+ ESDHC_INT_DATA_AVAIL | ESDHC_INT_SPACE_AVAIL | \
+ ESDHC_INT_DATA_TIMEOUT | ESDHC_INT_DATA_CRC | \
+ ESDHC_INT_DATA_END_BIT)
+
+#define ESDHC_INT_INSERT_MASK (ESDHC_INT_DATA_END_BIT | ESDHC_INT_DATA_CRC | \
+ ESDHC_INT_DATA_TIMEOUT | ESDHC_INT_INDEX | \
+ ESDHC_INT_END_BIT | ESDHC_INT_CRC | ESDHC_INT_TIMEOUT | \
+ ESDHC_INT_DATA_AVAIL | ESDHC_INT_SPACE_AVAIL | \
+ ESDHC_INT_DMA_END | ESDHC_INT_DATA_END | \
+ ESDHC_INT_RESPONSE | ESDHC_INT_CARD_REMOVE)
+
+#define ESDHC_INT_REMOVE_MASK (ESDHC_INT_DATA_END_BIT | ESDHC_INT_DATA_CRC | \
+ ESDHC_INT_DATA_TIMEOUT | ESDHC_INT_INDEX | \
+ ESDHC_INT_END_BIT | ESDHC_INT_CRC | ESDHC_INT_TIMEOUT | \
+ ESDHC_INT_DATA_AVAIL | ESDHC_INT_SPACE_AVAIL | \
+ ESDHC_INT_DMA_END | ESDHC_INT_DATA_END | \
+ ESDHC_INT_RESPONSE | ESDHC_INT_CARD_INSERT)
+
+/* Auto CMD12 Error Status Register */
+#define ESDHC_ACMD12_ERR 0x3C
+
+/* 3E-3F reserved */
+/* Host Controller Capabilities */
+#define ESDHC_CAPABILITIES 0x40
+
+#define ESDHC_MAX_BLOCK_MASK 0x00070000
+#define ESDHC_MAX_BLOCK_SHIFT 16
+#define ESDHC_CAN_DO_HISPD 0x00200000
+#define ESDHC_CAN_DO_DMA 0x00400000
+#define ESDHC_CAN_DO_SUSPEND 0x00800000
+#define ESDHC_CAN_VDD_330 0x01000000
+#define ESDHC_CAN_VDD_300 0x02000000
+#define ESDHC_CAN_VDD_180 0x04000000
+
+/* Watermark Level Register */
+#define ESDHC_WML 0x44
+#define ESDHC_WML_MASK 0xff
+#define ESDHC_WML_READ_SHIFT 0
+#define ESDHC_WML_WRITE_SHIFT 16
+
+/* 45-4F reserved for more caps and max curren*/
+
+/* Force Event Register */
+#define ESDHC_FORCE_EVENT 0x50
+
+/* 54-FB reserved */
+
+/* Host Controller Version Register */
+#define ESDHC_HOST_VERSION 0xFC
+
+#define ESDHC_VENDOR_VER_MASK 0xFF00
+#define ESDHC_VENDOR_VER_SHIFT 8
+#define ESDHC_SPEC_VER_MASK 0x00FF
+#define ESDHC_SPEC_VER_SHIFT 0
+
+#define ESDHC_DMA_SYSCTL 0x40C
+#define ESDHC_DMA_SNOOP 0x00000040
+
+#define ESDHC_SLOTS_NUMBER 1
+
+/* The SCCR[SDHCCM] Register */
+#define MPC837X_SCCR_OFFS 0xA08
+#define MPC837X_SDHCCM_MASK 0x0c000000
+#define MPC837X_SDHCCM_SHIFT 26
+
+#define esdhc_readl(addr) \
+ ({ unsigned int __v = (*(volatile unsigned int *) (addr)); __v; })
+
+#define esdhc_writel(b, addr) (void)((*(volatile unsigned int *) (addr)) = (b))
+
+static inline u32 fsl_readl(unsigned __iomem *addr)
+{
+ u32 val;
+ /*val = inl(addr);*/
+ val = esdhc_readl(addr);
+ return val;
+}
+
+static inline void fsl_writel(unsigned __iomem *addr, u32 val)
+{
+ /*outl(val, addr);*/
+ esdhc_writel(val, addr);
+}
+
+#define setbits32(_addr, _v) outl((_addr), inl(_addr) | (_v))
+#define clrbits32(_addr, _v) outl((_addr), inl(_addr) & ~(_v))
+
+struct esdhc_chip;
+
+struct esdhc_host {
+ struct esdhc_chip *chip;
+ struct mmc_host *mmc; /* MMC structure */
+
+ spinlock_t lock; /* Mutex */
+
+ int flags; /* Host attributes */
+#define ESDHC_USE_DMA (1<<0)
+
+ unsigned int max_clk; /* Max possible freq (MHz) */
+ unsigned int timeout_clk; /* Timeout freq (KHz) */
+
+ unsigned int clock; /* Current clock (MHz) */
+ unsigned short power; /* Current voltage */
+ unsigned short bus_width; /* current bus width */
+
+ struct mmc_request *mrq; /* Current request */
+ struct mmc_command *cmd; /* Current command */
+ struct mmc_data *data; /* Current data request */
+
+ struct scatterlist *cur_sg; /* We're working on this */
+ int num_sg; /* Entries left */
+ int offset; /* Offset into current sg */
+ int remain; /* Bytes left in current */
+
+ char slot_descr[20]; /* Name for reservations */
+
+ int card_insert;
+
+ int irq; /* Device IRQ */
+ unsigned long addr; /* Bus address */
+ unsigned int size; /* IO size */
+ void __iomem *ioaddr; /* Mapped address */
+
+ struct tasklet_struct card_tasklet; /* Tasklet structures */
+ struct tasklet_struct finish_tasklet;
+
+ struct timer_list timer; /* Timer for timeouts */
+ void *dma_tx_buf;
+ dma_addr_t dma_tx_dmahandle;
+};
+
+struct esdhc_chip {
+ struct platform_device *pdev;
+
+ unsigned long quirks;
+
+ int num_slots; /* Slots on controller */
+ struct esdhc_host *hosts[0]; /* Pointers to hosts */
+};
+
+#endif
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