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Subject[PATCH] mmc: Add driver for Freescale eSDHC controllers
From: Xie Xiaobo <X.Xie@freescale.com>

This patch adds support for the Freescale Enhanced Secure Digital
Host Controller Interface as found in some Freescale PowerPC
microprocessors (e.g. MPC837x SOCs).

Signed-off-by: Xie Xiaobo <X.Xie@freescale.com>
Signed-off-by: Konjin Lai <Konjin.Lai@freescale.com>
Signed-off-by: Joe D'Abbraccio <Joe.D'abbraccio@freescale.com>
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
---
drivers/mmc/host/Kconfig | 9 +
drivers/mmc/host/Makefile | 1 +
drivers/mmc/host/esdhc.c | 1321 +++++++++++++++++++++++++++++++++++++++++++++
drivers/mmc/host/esdhc.h | 255 +++++++++
4 files changed, 1586 insertions(+), 0 deletions(-)
create mode 100644 drivers/mmc/host/esdhc.c
create mode 100644 drivers/mmc/host/esdhc.h
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index dfa585f..941975c 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -65,6 +65,15 @@ config MMC_RICOH_MMC

If unsure, say Y.

+config MMC_ESDHC
+ tristate "Freescale Enhanced SD Host Controller Interface support"
+ depends on FSL_SOC
+ help
+ This selects the Freescale Enhanced SD Host Controller Interface
+ as found in some Freescale PowerPC microprocessors.
+
+ If unsure, say N.
+
config MMC_OMAP
tristate "TI OMAP Multimedia Card Interface support"
depends on ARCH_OMAP
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index f485328..031489f 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_MMC_IMX) += imxmmc.o
obj-$(CONFIG_MMC_SDHCI) += sdhci.o
obj-$(CONFIG_MMC_SDHCI_PCI) += sdhci-pci.o
obj-$(CONFIG_MMC_RICOH_MMC) += ricoh_mmc.o
+obj-$(CONFIG_MMC_ESDHC) += esdhc.o
obj-$(CONFIG_MMC_WBSD) += wbsd.o
obj-$(CONFIG_MMC_AU1X) += au1xmmc.o
obj-$(CONFIG_MMC_OMAP) += omap.o
diff --git a/drivers/mmc/host/esdhc.c b/drivers/mmc/host/esdhc.c
new file mode 100644
index 0000000..c97689d
--- /dev/null
+++ b/drivers/mmc/host/esdhc.c
@@ -0,0 +1,1321 @@
+/*
+ * Freescale Enhanced Secure Digital Host Controller driver.
+ *
+ * Copyright (C) 2005-2008 Pierre Ossman, All Rights Reserved.
+ * Copyright (C) 2007-2009 Freescale Semiconductor, Inc. All rights reserved.
+ * Copyright (C) 2008-2009 MontaVista Software, Inc. All rights reserved.
+ *
+ * Author: Xiaobo Xie <X.Xie@freescale.com>
+ *
+ * Derived from sdhci driver by Pierre Ossman <drzeus@drzeus.cx>
+ *
+ * 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/of.h>
+#include <linux/of_platform.h>
+#include <linux/mmc/host.h>
+#include "esdhc.h"
+
+#define DBG(fmt, args...) pr_debug("[%s] " fmt "\n", __func__, ## args)
+
+static unsigned int debug_nodma;
+module_param(debug_nodma, uint, 0444);
+MODULE_PARM_DESC(debug_nodma, "Forcefully disable DMA transfers.");
+
+static unsigned int debug_forcedma;
+module_param(debug_forcedma, uint, 0444);
+MODULE_PARM_DESC(debug_forcedma, "Forcefully enable DMA transfers.");
+
+#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 unsigned int debug_quirks;
+module_param(debug_quirks, uint, 0444);
+MODULE_PARM_DESC(debug_quirks, "Force certain quirks.");
+
+static void esdhc_dumpregs(struct esdhc_host *host)
+{
+ DBG("========= REGISTER DUMP ==========");
+ DBG("Sysaddr: 0x%08x | Blkattr: 0x%08x",
+ fsl_readl(host->ioaddr + ESDHC_DMA_ADDRESS),
+ fsl_readl(host->ioaddr + ESDHC_BLOCK_ATTR));
+ DBG("Argument: 0x%08x | COMMAND: 0x%08x",
+ fsl_readl(host->ioaddr + ESDHC_ARGUMENT),
+ fsl_readl(host->ioaddr + ESDHC_COMMAND));
+ DBG("Present: 0x%08x | DMA ctl: 0x%08x",
+ fsl_readl(host->ioaddr + ESDHC_PRESENT_STATE),
+ fsl_readl(host->ioaddr + ESDHC_DMA_SYSCTL));
+ DBG("PROCTL: 0x%08x | SYSCTL: 0x%08x",
+ fsl_readl(host->ioaddr + ESDHC_PROTOCOL_CONTROL),
+ fsl_readl(host->ioaddr + ESDHC_SYSTEM_CONTROL));
+ DBG("Int stat: 0x%08x",
+ fsl_readl(host->ioaddr + ESDHC_INT_STATUS));
+ DBG("Intenab: 0x%08x | Sigenab: 0x%08x",
+ fsl_readl(host->ioaddr + ESDHC_INT_ENABLE),
+ fsl_readl(host->ioaddr + ESDHC_SIGNAL_ENABLE));
+ DBG("AC12 err: 0x%08x | Version: 0x%08x",
+ fsl_readl(host->ioaddr + ESDHC_ACMD12_ERR),
+ fsl_readl(host->ioaddr + ESDHC_HOST_VERSION));
+ DBG("Caps: 0x%08x | Watermark: 0x%08x",
+ fsl_readl(host->ioaddr + ESDHC_CAPABILITIES),
+ fsl_readl(host->ioaddr + ESDHC_WML));
+ DBG("==================================");
+}
+
+static void esdhc_reset(struct esdhc_host *host, u8 mask)
+{
+ unsigned long timeout;
+ unsigned int sysctl;
+
+ if (host->quirks & ESDHC_QUIRK_NO_CARD_NO_RESET) {
+ if (!(fsl_readl(host->ioaddr + ESDHC_PRESENT_STATE) &
+ ESDHC_CARD_PRESENT))
+ return;
+ }
+
+ setbits32(host->ioaddr + ESDHC_SYSTEM_CONTROL,
+ mask << ESDHC_RESET_SHIFT);
+
+ 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) {
+ dev_err(host->mmc->parent, "Reset 0x%x never "
+ "completed.\n", (int)mask);
+ esdhc_dumpregs(host);
+ return;
+ }
+ timeout--;
+ mdelay(1);
+ }
+}
+
+static void esdhc_init(struct esdhc_host *host)
+{
+ u32 intmask;
+
+ esdhc_reset(host, ESDHC_RESET_ALL);
+
+ setbits32(host->ioaddr + ESDHC_SYSTEM_CONTROL,
+ (ESDHC_CLOCK_INT_EN | ESDHC_CLOCK_INT_STABLE));
+
+ 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;
+
+ if (host->card_insert)
+ intmask |= ESDHC_INT_CARD_REMOVE;
+ else
+ intmask |= ESDHC_INT_CARD_INSERT;
+
+ fsl_writel(host->ioaddr + ESDHC_INT_ENABLE, intmask);
+ fsl_writel(host->ioaddr + ESDHC_SIGNAL_ENABLE, intmask);
+
+ setbits32(host->ioaddr + ESDHC_DMA_SYSCTL, ESDHC_DMA_SNOOP);
+}
+
+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;
+
+ if (host->card_insert)
+ intmask |= ESDHC_INT_CARD_REMOVE;
+ else
+ intmask |= ESDHC_INT_CARD_INSERT;
+
+ 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);
+ }
+}
+
+/* Return the SG's virtual address */
+static inline char *esdhc_sg_to_buffer(struct esdhc_host *host)
+{
+ return sg_virt(host->cur_sg);
+}
+
+static inline int esdhc_next_sg(struct esdhc_host *host)
+{
+ /* Skip to next SG entry. */
+ host->cur_sg++;
+ host->num_sg--;
+
+ /* Any entries left? */
+ if (host->num_sg > 0) {
+ host->offset = 0;
+ host->remain = host->cur_sg->length;
+ }
+
+ return host->num_sg;
+}
+
+static void esdhc_read_block_pio(struct esdhc_host *host)
+{
+ int blksize;
+ int chunk_remain;
+ u32 data;
+ char *buffer;
+ int size;
+
+ DBG("PIO reading\n");
+
+ 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;
+ int chunk_remain;
+ u32 data;
+ char *buffer;
+ int bytes, size;
+
+ DBG("PIO writing\n");
+
+ 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) {
+ writel(data, host->ioaddr + ESDHC_BUFFER);
+ 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");
+}
+
+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\n",
+ data->blksz, data->blocks, data->flags);
+ DBG("tsac %d ms nsac %d clk\n",
+ 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) {
+ dev_err(host->mmc->parent, "The SD_CLK isn't set\n");
+ 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) {
+ dev_warn(host->mmc->parent, "Too large timeout requested!\n");
+ count = 0xE;
+ }
+ if (data->blocks >= 0x50)
+ 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));
+
+ if (host->flags & ESDHC_USE_DMA) {
+ int sg_count;
+ unsigned int wml;
+ unsigned int wml_value;
+
+ 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);
+
+ fsl_writel(host->ioaddr + ESDHC_DMA_ADDRESS,
+ sg_dma_address(data->sg));
+
+ /* Disable the BRR and BWR interrupt */
+ clrbits32(host->ioaddr + ESDHC_INT_ENABLE,
+ (ESDHC_INT_DATA_AVAIL | ESDHC_INT_SPACE_AVAIL));
+ clrbits32(host->ioaddr + ESDHC_SIGNAL_ENABLE,
+ (ESDHC_INT_DATA_AVAIL | ESDHC_INT_SPACE_AVAIL));
+
+ wml_value = data->blksz/4;
+ if (data->flags & MMC_DATA_READ) {
+ 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 {
+ host->cur_sg = data->sg;
+ host->num_sg = data->sg_len;
+
+ host->offset = 0;
+ host->remain = host->cur_sg->length;
+
+ setbits32(host->ioaddr + ESDHC_INT_ENABLE,
+ (ESDHC_INT_DATA_AVAIL | ESDHC_INT_SPACE_AVAIL));
+ setbits32(host->ioaddr + ESDHC_SIGNAL_ENABLE,
+ (ESDHC_INT_DATA_AVAIL | ESDHC_INT_SPACE_AVAIL));
+ }
+
+ /* We do not handle DMA boundaries */
+ blkattr = data->blksz;
+ blkattr |= data->blocks << 16;
+ fsl_writel(host->ioaddr + ESDHC_BLOCK_ATTR, blkattr);
+}
+
+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)
+ 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_send_command(struct esdhc_host *host, struct mmc_command *cmd)
+{
+ unsigned int flags;
+ u32 mask;
+ unsigned long timeout;
+
+ WARN_ON(host->cmd);
+
+ DBG("Sending cmd (%d)", cmd->opcode);
+
+ /* 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) {
+ dev_err(host->mmc->parent, "Controller never "
+ "released inhibit bit(s).\n");
+ esdhc_dumpregs(host);
+ cmd->error = -EIO;
+ tasklet_schedule(&host->finish_tasklet);
+ return;
+ }
+ timeout--;
+ mdelay(1);
+ }
+
+ mod_timer(&host->timer, jiffies + 10 * 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)) {
+ dev_err(host->mmc->parent, "Unsupported response type!\n");
+ cmd->error = -EINVAL;
+ 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_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) {
+ dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
+ (data->flags & MMC_DATA_READ) ?
+ DMA_FROM_DEVICE : DMA_TO_DEVICE);
+ }
+
+ /*
+ * Controller doesn't count down when in single block mode.
+ */
+ if (data->blocks == 1 && data->error == 0)
+ blocks = 0;
+ else
+ blocks = fsl_readl(host->ioaddr + ESDHC_BLOCK_ATTR) >> 16;
+
+ data->bytes_xfered = data->blksz * (data->blocks - blocks);
+
+ if (data->error == 0 && blocks) {
+ dev_err(host->mmc->parent, "Controller signalled completion "
+ "even though there were blocks left.\n");
+ data->error = -EIO;
+ }
+
+ if (blocks == 0 && data->error == -ETIMEDOUT) {
+ dev_err(host->mmc->parent, "Controller transmitted completion "
+ "even though there were timeout error.\n");
+ data->error = 0;
+ }
+
+ DBG("Ending data transfer (%d bytes)\n", data->bytes_xfered);
+
+ if (data->stop) {
+ /*
+ * The controller needs a reset of internal state machines
+ * upon error conditions.
+ */
+ if (data->error != 0) {
+ 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_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 = 0;
+
+ DBG("Ending cmd (%d)", host->cmd->opcode);
+
+ if (host->cmd->data)
+ host->data = host->cmd->data;
+ else
+ tasklet_schedule(&host->finish_tasklet);
+
+ host->cmd = NULL;
+}
+
+static void esdhc_set_clock(struct esdhc_host *host, unsigned int clock)
+{
+ int pre_div;
+ int div;
+ u16 clk;
+ unsigned long timeout;
+
+ if (clock == host->clock)
+ return;
+
+ clrbits32(host->ioaddr + ESDHC_SYSTEM_CONTROL, ESDHC_CLOCK_MASK);
+
+ if (clock == 0)
+ goto out;
+
+ if (host->max_clk / 16 > clock) {
+ for (pre_div = 1; pre_div < 256; pre_div *= 2) {
+ if ((host->max_clk / pre_div) < (clock*16))
+ break;
+ }
+ } else {
+ pre_div = 1;
+ }
+
+ for (div = 1; div <= 16; div++) {
+ if ((host->max_clk / (div * pre_div)) <= clock)
+ break;
+ }
+
+ pre_div >>= 1;
+ div -= 1;
+
+ clk = (div << ESDHC_DIVIDER_SHIFT) | (pre_div << ESDHC_PREDIV_SHIFT);
+ setbits32(host->ioaddr + ESDHC_SYSTEM_CONTROL, clk);
+
+ /* Wait max 10 ms */
+ timeout = 10;
+ while (timeout) {
+ timeout--;
+ mdelay(1);
+ }
+
+ setbits32(host->ioaddr + ESDHC_SYSTEM_CONTROL, ESDHC_CLOCK_CARD_EN);
+ esdhc_dumpregs(host);
+
+out:
+ host->clock = clock;
+ if (host->clock == 0)
+ setbits32(host->ioaddr + ESDHC_SYSTEM_CONTROL,
+ ESDHC_CLOCK_DEFAULT);
+}
+
+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;
+}
+
+static void esdhc_request(struct mmc_host *mmc, struct mmc_request *mrq)
+{
+ struct esdhc_host *host = mmc_priv(mmc);
+ unsigned long flags;
+
+ spin_lock_irqsave(&host->lock, flags);
+
+ WARN_ON(host->mrq != NULL);
+
+ host->mrq = mrq;
+
+ if (!(fsl_readl(host->ioaddr + ESDHC_PRESENT_STATE) &
+ ESDHC_CARD_PRESENT)) {
+ host->mrq->cmd->error = -ETIMEDOUT;
+ tasklet_schedule(&host->finish_tasklet);
+ } else {
+ 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 = mmc_priv(mmc);
+ unsigned long flags;
+ u32 ctrl;
+
+ 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;
+ } 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);
+}
+
+static int esdhc_get_ro(struct mmc_host *mmc)
+{
+ struct esdhc_host *host = mmc_priv(mmc);
+ unsigned long flags;
+ int present;
+
+ spin_lock_irqsave(&host->lock, flags);
+
+ present = fsl_readl(host->ioaddr + ESDHC_PRESENT_STATE);
+
+ spin_unlock_irqrestore(&host->lock, flags);
+
+ /* esdhc is different form sdhc */
+ return present & ESDHC_WRITE_PROTECT;
+}
+
+static const struct mmc_host_ops esdhc_ops = {
+ .request = esdhc_request,
+ .set_ios = esdhc_set_ios,
+ .get_ro = esdhc_get_ro,
+};
+
+static void esdhc_tasklet_card(unsigned long param)
+{
+ struct esdhc_host *host = (struct esdhc_host *)param;
+ unsigned long flags;
+
+ spin_lock_irqsave(&host->lock, flags);
+
+ if (!(fsl_readl(host->ioaddr + ESDHC_PRESENT_STATE) &
+ ESDHC_CARD_PRESENT)) {
+ if (host->mrq) {
+ dev_err(host->mmc->parent,
+ "Card removed during transfer! "
+ "Resetting the controller.\n");
+
+ esdhc_reset(host, ESDHC_RESET_CMD);
+ esdhc_reset(host, ESDHC_RESET_DATA);
+
+ host->mrq->cmd->error = -EIO;
+ tasklet_schedule(&host->finish_tasklet);
+ }
+ host->card_insert = 0;
+ } else {
+ esdhc_reset(host, ESDHC_INIT_CARD);
+ host->card_insert = 1;
+ }
+
+ spin_unlock_irqrestore(&host->lock, flags);
+
+ mmc_detect_change(host->mmc, msecs_to_jiffies(500));
+}
+
+static void esdhc_tasklet_finish(unsigned long param)
+{
+ struct esdhc_host *host = (struct esdhc_host *)param;
+ unsigned long flags;
+ struct mmc_request *mrq;
+
+ spin_lock_irqsave(&host->lock, flags);
+
+ del_timer(&host->timer);
+
+ mrq = host->mrq;
+
+ DBG("Ending request, cmd (%d)", mrq->cmd->opcode);
+
+ /*
+ * The controller needs a reset of internal state machines
+ * upon error conditions.
+ */
+ if ((mrq->cmd->error != 0) ||
+ (mrq->data && ((mrq->data->error != 0) ||
+ (mrq->data->stop &&
+ (mrq->data->stop->error != 0))))) {
+
+ /* Some controllers need this kick or reset won't work here */
+ if (host->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);
+ }
+
+ /* Spec says we should do both at the same time, but Ricoh
+ controllers do not like that. */
+ if (mrq->cmd->error != -ETIMEDOUT) {
+ 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;
+
+ mmiowb();
+ spin_unlock_irqrestore(&host->lock, flags);
+
+ mmc_request_done(host->mmc, mrq);
+}
+
+static void esdhc_timeout_timer(unsigned long data)
+{
+ struct esdhc_host *host = (struct esdhc_host *)data;
+ unsigned long flags;
+
+ spin_lock_irqsave(&host->lock, flags);
+
+ if (host->mrq) {
+ dev_err(host->mmc->parent, "Timeout waiting for hardware "
+ "interrupt.\n");
+ esdhc_dumpregs(host);
+
+ if (host->data) {
+ host->data->error = -ETIMEDOUT;
+ esdhc_finish_data(host);
+ } else {
+ if (host->cmd)
+ host->cmd->error = -ETIMEDOUT;
+ else
+ host->mrq->cmd->error = -ETIMEDOUT;
+
+ tasklet_schedule(&host->finish_tasklet);
+ }
+ }
+
+ mmiowb();
+ spin_unlock_irqrestore(&host->lock, flags);
+}
+
+static void esdhc_cmd_irq(struct esdhc_host *host, u32 intmask)
+{
+ BUG_ON(intmask == 0);
+
+ if (!host->cmd) {
+ dev_err(host->mmc->parent, "Got command interrupt even "
+ "though no command operation was in progress.\n");
+ esdhc_dumpregs(host);
+ return;
+ }
+
+ if (intmask & ESDHC_INT_TIMEOUT) {
+ host->cmd->error = -ETIMEDOUT;
+ tasklet_schedule(&host->finish_tasklet);
+ } else if (intmask & ESDHC_INT_RESPONSE) {
+ esdhc_finish_command(host);
+ } else {
+ if (intmask & ESDHC_INT_CRC)
+ host->cmd->error = -EILSEQ;
+ else if (intmask & (ESDHC_INT_END_BIT | ESDHC_INT_INDEX))
+ host->cmd->error = -EIO;
+ else
+ host->cmd->error = -EINVAL;
+
+ 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;
+
+ dev_err(host->mmc->parent, "Got data interrupt even though "
+ "no data operation was in progress.\n");
+ esdhc_dumpregs(host);
+ return;
+ }
+
+ if (intmask & ESDHC_INT_DATA_TIMEOUT)
+ host->data->error = -ETIMEDOUT;
+ else if (intmask & ESDHC_INT_DATA_CRC)
+ host->data->error = -EILSEQ;
+ else if (intmask & ESDHC_INT_DATA_END_BIT)
+ host->data->error = -EIO;
+
+ if (host->data->error != 0) {
+ 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_irq(int irq, void *dev_id)
+{
+ struct esdhc_host *host = dev_id;
+ irqreturn_t result;
+ u32 status;
+
+ spin_lock_irq(&host->lock);
+
+ status = fsl_readl(host->ioaddr + ESDHC_INT_STATUS);
+
+ if (!status || status == 0xffffffff) {
+ result = IRQ_NONE;
+ goto out;
+ }
+
+ if (status & (ESDHC_INT_CARD_INSERT | ESDHC_INT_CARD_REMOVE)) {
+ if (status & ESDHC_INT_CARD_INSERT) {
+ if (fsl_readl(host->ioaddr + ESDHC_PRESENT_STATE) &
+ ESDHC_CARD_PRESENT) {
+ DBG("*** got card-insert interrupt");
+ fsl_writel(host->ioaddr + ESDHC_INT_ENABLE,
+ ESDHC_INT_INSERT_MASK);
+ fsl_writel(host->ioaddr + ESDHC_SIGNAL_ENABLE,
+ ESDHC_INT_INSERT_MASK);
+ }
+ }
+ if (status & ESDHC_INT_CARD_REMOVE) {
+ if (!(fsl_readl(host->ioaddr + ESDHC_PRESENT_STATE) &
+ ESDHC_CARD_PRESENT)) {
+ DBG("*** got card-remove interrupt");
+ fsl_writel(host->ioaddr + ESDHC_INT_ENABLE,
+ ESDHC_INT_REMOVE_MASK);
+ fsl_writel(host->ioaddr + ESDHC_SIGNAL_ENABLE,
+ ESDHC_INT_REMOVE_MASK);
+ }
+ }
+
+ tasklet_schedule(&host->card_tasklet);
+ }
+
+ status &= ~(ESDHC_INT_CARD_INSERT | ESDHC_INT_CARD_REMOVE);
+
+ 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) {
+ dev_err(host->mmc->parent, "Unexpected interrupt 0x%08x.\n",
+ status);
+ esdhc_dumpregs(host);
+ fsl_writel(host->ioaddr + ESDHC_INT_STATUS, status);
+ }
+
+ result = IRQ_HANDLED;
+
+ mmiowb();
+out:
+ spin_unlock_irq(&host->lock);
+
+ return result;
+}
+
+#ifdef CONFIG_PM
+
+static int esdhc_suspend(struct of_device *ofdev, pm_message_t state)
+{
+ struct esdhc_host *host = dev_get_drvdata(&ofdev->dev);
+ int ret;
+
+ DBG("Suspending...");
+
+ ret = mmc_suspend_host(host->mmc, state);
+ if (ret)
+ return ret;
+
+ disable_irq(host->irq);
+ return 0;
+}
+
+static int esdhc_resume(struct of_device *ofdev)
+{
+ struct esdhc_host *host = dev_get_drvdata(&ofdev->dev);
+ int ret;
+
+ DBG("Resuming...");
+
+ esdhc_init(host);
+ enable_irq(host->irq);
+ mmiowb();
+
+ ret = mmc_resume_host(host->mmc);
+ if (ret)
+ return ret;
+ return 0;
+}
+
+#else
+
+#define esdhc_suspend NULL
+#define esdhc_resume NULL
+
+#endif /* CONFIG_PM */
+
+static int __devinit esdhc_probe(struct of_device *ofdev,
+ const struct of_device_id *match)
+{
+ struct device_node *np = ofdev->node;
+ struct esdhc_host *host;
+ struct mmc_host *mmc;
+ struct resource res;
+ unsigned int version;
+ unsigned int caps;
+ const u32 *clk;
+ int size;
+ int ret;
+
+ mmc = mmc_alloc_host(sizeof(struct esdhc_host), &ofdev->dev);
+ if (!mmc)
+ return -ENOMEM;
+
+ host = mmc_priv(mmc);
+ host->mmc = mmc;
+ dev_set_drvdata(&ofdev->dev, host);
+
+ ret = of_address_to_resource(np, 0, &res);
+ if (ret)
+ goto err_no_addr;
+
+ host->addr = res.start;
+ host->size = res.end - res.start + 1;
+
+ if (!request_mem_region(host->addr, host->size,
+ dev_name(&ofdev->dev))) {
+ ret = -EBUSY;
+ goto err_addr_request;
+ }
+
+ host->ioaddr = ioremap_nocache(host->addr, host->size);
+ if (!host->ioaddr) {
+ ret = -ENOMEM;
+ goto err_addr_map;
+ }
+
+ host->irq = irq_of_parse_and_map(np, 0);
+ if (!host->irq) {
+ ret = -EINVAL;
+ goto err_no_irq;
+ }
+
+ esdhc_reset(host, ESDHC_RESET_ALL);
+
+ version = fsl_readl(host->ioaddr + ESDHC_HOST_VERSION);
+ if (version != 0x01) {
+ dev_err(host->mmc->parent, "Unknown controller version "
+ "(%d). You may experience problems.\n", version);
+ }
+
+
+ host->quirks = ESDHC_QUIRK_NO_CARD_NO_RESET;
+ if (debug_quirks)
+ host->quirks = debug_quirks;
+
+ caps = fsl_readl(host->ioaddr + ESDHC_CAPABILITIES);
+
+ if (debug_nodma) {
+ DBG("DMA forced off\n");
+ } else if (debug_forcedma) {
+ DBG("DMA forced on\n");
+ host->flags |= ESDHC_USE_DMA;
+ } else if (host->quirks & ESDHC_QUIRK_FORCE_DMA) {
+ 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;
+ }
+
+ clk = of_get_property(np, "clock-frequency", &size);
+ if (!clk || size != sizeof(*clk) || !*clk) {
+ ret = -EINVAL;
+ goto err_no_clk;
+ }
+ host->max_clk = *clk;
+
+ /*
+ * Set host parameters.
+ */
+ mmc->ops = &esdhc_ops;
+ mmc->f_min = 400000;
+ mmc->f_max = min((int)*clk, 50000000);
+ mmc->caps = MMC_CAP_4_BIT_DATA;
+
+ if (caps & ESDHC_CAN_DO_HISPD)
+ mmc->caps |= MMC_CAP_SD_HIGHSPEED;
+
+ 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) {
+ dev_err(host->mmc->parent, "Hardware doesn't report any "
+ "support voltages.\n");
+ ret = -ENODEV;
+ goto err_no_ocr;
+ }
+
+ spin_lock_init(&host->lock);
+
+ /*
+ * Maximum number of segments. Hardware cannot do scatter lists.
+ */
+ if (host->flags & ESDHC_USE_DMA)
+ mmc->max_hw_segs = 1;
+ else
+ mmc->max_hw_segs = 16;
+ mmc->max_phys_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) {
+ dev_err(host->mmc->parent, "Invalid maximum block size.\n");
+ ret = -ENODEV;
+ goto err_blk_size;
+ }
+ mmc->max_blk_size = 512 << mmc->max_blk_size;
+
+ /*
+ * Maximum block count.
+ */
+ mmc->max_blk_count = 65535;
+
+ /*
+ * 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);
+
+#ifdef CONFIG_MMC_DEBUG
+ esdhc_dumpregs(host);
+#endif
+
+ ret = request_irq(host->irq, esdhc_irq, IRQF_SHARED,
+ mmc_hostname(mmc), host);
+ if (ret)
+ goto err_request_irq;
+
+ mmiowb();
+
+ mmc_add_host(mmc);
+
+ dev_info(host->mmc->parent, "probed at 0x%08lx, irq %d, %s\n",
+ host->addr, host->irq,
+ (host->flags & ESDHC_USE_DMA) ? "DMA" : "PIO");
+
+ return 0;
+
+err_request_irq:
+ tasklet_kill(&host->card_tasklet);
+ tasklet_kill(&host->finish_tasklet);
+err_blk_size:
+err_no_ocr:
+err_no_clk:
+ irq_dispose_mapping(host->irq);
+err_no_irq:
+ iounmap(host->ioaddr);
+err_addr_map:
+ release_mem_region(host->addr, host->size);
+err_addr_request:
+err_no_addr:
+ mmc_free_host(mmc);
+ return ret;
+}
+
+static int __devexit esdhc_remove(struct of_device *ofdev)
+{
+
+ struct esdhc_host *host = dev_get_drvdata(&ofdev->dev);
+ struct mmc_host *mmc = host->mmc;
+
+ mmc_remove_host(mmc);
+
+ esdhc_reset(host, ESDHC_RESET_ALL);
+
+ free_irq(host->irq, host);
+ irq_dispose_mapping(host->irq);
+
+ 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);
+ return 0;
+}
+
+static const struct of_device_id fsl_esdhc_match[] = {
+ { .compatible = "fsl,esdhc", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, fsl_esdhc_match);
+
+static struct of_platform_driver esdhc_driver = {
+ .driver.name = "esdhc",
+ .match_table = fsl_esdhc_match,
+ .probe = esdhc_probe,
+ .remove = __devexit_p(esdhc_remove),
+ .suspend = esdhc_suspend,
+ .resume = esdhc_resume,
+};
+
+static int __init esdhc_drv_init(void)
+{
+ pr_info("%s: Freescale Enhanced Secure Digital Host Controller\n",
+ esdhc_driver.driver.name);
+ return of_register_platform_driver(&esdhc_driver);
+}
+module_init(esdhc_drv_init);
+
+static void __exit esdhc_drv_exit(void)
+{
+ of_unregister_platform_driver(&esdhc_driver);
+}
+module_exit(esdhc_drv_exit);
+
+MODULE_DESCRIPTION("Enhanced Secure Digital Host Controller driver");
+MODULE_AUTHOR("Xiaobo Xie <X.Xie@freescale.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/mmc/host/esdhc.h b/drivers/mmc/host/esdhc.h
new file mode 100644
index 0000000..0e259c6
--- /dev/null
+++ b/drivers/mmc/host/esdhc.h
@@ -0,0 +1,255 @@
+/*
+ * Freescale Enhanced Secure Digital Host Controller driver.
+ *
+ * Copyright (C) 2005-2008 Pierre Ossman, All Rights Reserved.
+ * Copyright (C) 2007-2009 Freescale Semiconductor, Inc. All rights reserved.
+ * Copyright (C) 2008-2009 MontaVista Software, Inc. All rights reserved.
+ *
+ * Author: Xiaobo Xie <X.Xie@freescale.com>
+ *
+ * Derived from sdhci driver by Pierre Ossman <drzeus@drzeus.cx>
+ *
+ * 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 __MMC_HOST_ESDHC_H
+#define __MMC_HOST_ESDHC_H
+
+#include <linux/io.h>
+
+/*
+ * Controller registers (Big Endian)
+ */
+/* 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
+
+static inline u32 fsl_readl(void __iomem *addr)
+{
+ return in_be32(addr);
+}
+
+static inline void fsl_writel(void __iomem *addr, u32 val)
+{
+ out_be32(addr, val);
+}
+
+struct mmc_host;
+
+struct esdhc_host {
+ struct mmc_host *mmc; /* MMC structure */
+
+ spinlock_t lock; /* Mutex */
+
+ unsigned long quirks; /* Host quirks */
+ 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 */
+
+ 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 */
+};
+
+#endif /* __MMC_HOST_ESDHC_H */
--
1.5.6.5

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  Last update: 2009-01-14 20:49    [from the cache]
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