new file mode 100644
@@ -0,0 +1,43 @@
+ROM-able zImage boot from eSD
+-----------------------------
+
+An ROM-able zImage compiled with ZBOOT_ROM_SDHI may be written to eSD and
+SuperH Mobile ARM will to boot directly from the SDHI hardware block.
+
+This is achieved by the mask ROM loading the first portion of the image into
+MERAM and then jumping to it. This portion contains loader code which
+copies the entire image to SDRAM and jumps to it. From there the zImage
+boot code proceeds as normal, uncompressing the image into its final
+location and then jumping to it.
+
+This code has been tested on an mackerel board using the developer 1A eSD
+boot mode which is configured using the following jumper settings.
+
+ 8 7 6 5 4 3 2 1
+ x|x|x|x| |x|x|
+S4 -+-+-+-+-+-+-+-
+ | | | |x| | |x on
+
+The eSD card needs to be present in SDHI slot 1 (CN7).
+As such S1 and S33 also need to be configured as per
+the notes in arch/arm/mach-shmobile/board-mackerel.c.
+
+A partial zImage must be written to physical partition #1 (boot)
+of the eSD at sector 0 in vrl4 format. A utility vrl4 is supplied to
+accomplish this.
+
+e.g.
+ vrl4 < zImage | dd of=/dev/sdX bs=512 count=17
+
+A full copy of _the same_ zImage should be written to physical partition #1
+(boot) of the eSD at sector 0. This should _not_ be in vrl4 format.
+
+ vrl4 < zImage | dd of=/dev/sdX bs=512
+
+Note: The commands above assume that the physical partition has been
+switched. No such facility currently exists in the Linux Kernel.
+
+Physical partitions are described in the eSD specification. At the time of
+writing they are not the same as partitions that are typically configured
+using fdisk and visible through /proc/partitions
+
@@ -1715,17 +1715,34 @@ config ZBOOT_ROM
Say Y here if you intend to execute your compressed kernel image
(zImage) directly from ROM or flash. If unsure, say N.
+choice
+ prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
+ depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
+ default ZBOOT_ROM_NONE
+ help
+ Include experimental SD/MMC loading code in the ROM-able zImage.
+ With this enabled it is possible to write the the ROM-able zImage
+ kernel image to an MMC or SD card and boot the kernel straight
+ from the reset vector. At reset the processor Mask ROM will load
+ the first part of the the ROM-able zImage which in turn loads the
+ rest the kernel image to RAM.
+
+config ZBOOT_ROM_NONE
+ bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
+ help
+ Do not load image from SD or MMC
+
config ZBOOT_ROM_MMCIF
bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
- depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
help
- Say Y here to include experimental MMCIF loading code in the
- ROM-able zImage. With this enabled it is possible to write the
- the ROM-able zImage kernel image to an MMC card and boot the
- kernel straight from the reset vector. At reset the processor
- Mask ROM will load the first part of the the ROM-able zImage
- which in turn loads the rest the kernel image to RAM using the
- MMCIF hardware block.
+ Load image from MMCIF hardware block.
+
+config ZBOOT_ROM_SH_MOBILE_SDHI
+ bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
+ help
+ Load image from SDHI hardware block
+
+endchoice
config CMDLINE
string "Default kernel command string"
@@ -6,13 +6,19 @@
OBJS =
-# Ensure that mmcif loader code appears early in the image
+# Ensure that MMCIF loader code appears early in the image
# to minimise that number of bocks that have to be read in
# order to load it.
ifeq ($(CONFIG_ZBOOT_ROM_MMCIF),y)
-ifeq ($(CONFIG_ARCH_SH7372),y)
OBJS += mmcif-sh7372.o
endif
+
+# Ensure that SDHI loader code appears early in the image
+# to minimise that number of bocks that have to be read in
+# order to load it.
+ifeq ($(CONFIG_ZBOOT_ROM_SH_MOBILE_SDHI),y)
+OBJS += sdhi-shmobile.o
+OBJS += sdhi-sh7372.o
endif
AFLAGS_head.o += -DTEXT_OFFSET=$(TEXT_OFFSET)
@@ -25,14 +25,14 @@
/* load board-specific initialization code */
#include <mach/zboot.h>
-#ifdef CONFIG_ZBOOT_ROM_MMCIF
- /* Load image from MMC */
- adr sp, __tmp_stack + 128
+#if defined(CONFIG_ZBOOT_ROM_MMCIF) || defined(CONFIG_ZBOOT_ROM_SH_MOBILE_SDHI)
+ /* Load image from MMC/SD */
+ adr sp, __tmp_stack + 256
ldr r0, __image_start
ldr r1, __image_end
subs r1, r1, r0
ldr r0, __load_base
- bl mmcif_loader
+ bl mmc_loader
/* Jump to loaded code */
ldr r0, __loaded
@@ -51,9 +51,9 @@ __loaded:
.long __continue
.align
__tmp_stack:
- .space 128
+ .space 256
__continue:
-#endif /* CONFIG_ZBOOT_ROM_MMCIF */
+#endif /* CONFIG_ZBOOT_ROM_MMC || CONFIG_ZBOOT_ROM_SH_MOBILE_SDHI */
b 1f
__atags:@ tag #1
@@ -40,7 +40,7 @@
* to an MMC card
* # dd if=vrl4.out of=/dev/sdx bs=512 seek=1
*/
-asmlinkage void mmcif_loader(unsigned char *buf, unsigned long len)
+asmlinkage void mmc_loader(unsigned char *buf, unsigned long len)
{
mmc_init_progress();
mmc_update_progress(MMC_PROGRESS_ENTER);
new file mode 100644
@@ -0,0 +1,95 @@
+/*
+ * SuperH Mobile SDHI
+ *
+ * Copyright (C) 2010 Magnus Damm
+ * Copyright (C) 2010 Kuninori Morimoto
+ * Copyright (C) 2010 Simon Horman
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Parts inspired by u-boot
+ */
+
+#include <linux/io.h>
+#include <mach/mmc.h>
+#include <linux/mmc/boot.h>
+#include <linux/mmc/tmio.h>
+
+#include "sdhi-shmobile.h"
+
+#define PORT179CR 0xe60520b3
+#define PORT180CR 0xe60520b4
+#define PORT181CR 0xe60520b5
+#define PORT182CR 0xe60520b6
+#define PORT183CR 0xe60520b7
+#define PORT184CR 0xe60520b8
+
+#define SMSTPCR3 0xe615013c
+
+#define CR_INPUT_ENABLE 0x10
+#define CR_FUNCTION1 0x01
+
+#define SDHI1_BASE (void __iomem *)0xe6860000
+#define SDHI_BASE SDHI1_BASE
+
+/* SuperH Mobile SDHI loader
+ *
+ * loads the zImage from an SD card starting from block 0
+ * on physical partition 1
+ *
+ * The image must be start with a vrl4 header and
+ * the zImage must start at offset 512 of the image. That is,
+ * at block 1 (=byte 512) of physical partition 1
+ *
+ * Use the following line to write the vrl4 formated zImage
+ * to an SD card
+ * # dd if=vrl4.out of=/dev/sdx bs=512
+ */
+asmlinkage void mmc_loader(unsigned short *buf, unsigned long len)
+{
+ int high_capacity;
+
+ mmc_init_progress();
+
+ mmc_update_progress(MMC_PROGRESS_ENTER);
+ /* Initialise SDHI1 */
+ /* PORT184CR: GPIO_FN_SDHICMD1 Control */
+ __raw_writeb(CR_FUNCTION1, PORT184CR);
+ /* PORT179CR: GPIO_FN_SDHICLK1 Control */
+ __raw_writeb(CR_INPUT_ENABLE|CR_FUNCTION1, PORT179CR);
+ /* PORT181CR: GPIO_FN_SDHID1_3 Control */
+ __raw_writeb(CR_FUNCTION1, PORT183CR);
+ /* PORT182CR: GPIO_FN_SDHID1_2 Control */
+ __raw_writeb(CR_FUNCTION1, PORT182CR);
+ /* PORT183CR: GPIO_FN_SDHID1_1 Control */
+ __raw_writeb(CR_FUNCTION1, PORT181CR);
+ /* PORT180CR: GPIO_FN_SDHID1_0 Control */
+ __raw_writeb(CR_FUNCTION1, PORT180CR);
+
+ /* Enable clock to SDHI1 hardware block */
+ __raw_writel(__raw_readl(SMSTPCR3) & ~(1 << 13), SMSTPCR3);
+
+ /* setup SDHI hardware */
+ mmc_update_progress(MMC_PROGRESS_INIT);
+ high_capacity = sdhi_boot_init(SDHI_BASE);
+ if (high_capacity < 0)
+ goto err;
+
+ mmc_update_progress(MMC_PROGRESS_LOAD);
+ /* load kernel */
+ if (sdhi_boot_do_read(SDHI_BASE, high_capacity,
+ 0, /* Kernel is at block 1 */
+ (len + TMIO_BBS - 1) / TMIO_BBS, buf))
+ goto err;
+
+ /* Disable clock to SDHI1 hardware block */
+ __raw_writel(__raw_readl(SMSTPCR3) & (1 << 13), SMSTPCR3);
+
+ mmc_update_progress(MMC_PROGRESS_DONE);
+
+ return;
+err:
+ for(;;);
+}
new file mode 100644
@@ -0,0 +1,449 @@
+/*
+ * SuperH Mobile SDHI
+ *
+ * Copyright (C) 2010 Magnus Damm
+ * Copyright (C) 2010 Kuninori Morimoto
+ * Copyright (C) 2010 Simon Horman
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Parts inspired by u-boot
+ */
+
+#include <linux/io.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/core.h>
+#include <linux/mmc/mmc.h>
+#include <linux/mmc/sd.h>
+#include <linux/mmc/tmio.h>
+#include <mach/sdhi.h>
+
+#define OCR_FASTBOOT (1<<29)
+#define OCR_HCS (1<<30)
+#define OCR_BUSY (1<<31)
+
+#define RESP_CMD12 0x00000030
+
+static inline u16 sd_ctrl_read16(void __iomem *base, int addr)
+{
+ return __raw_readw(base + addr);
+}
+
+static inline u32 sd_ctrl_read32(void __iomem *base, int addr)
+{
+ return __raw_readw(base + addr) |
+ __raw_readw(base + addr + 2) << 16;
+}
+
+static inline void sd_ctrl_write16(void __iomem *base, int addr, u16 val)
+{
+ __raw_writew(val, base + addr);
+}
+
+static inline void sd_ctrl_write32(void __iomem *base, int addr, u32 val)
+{
+ __raw_writew(val, base + addr);
+ __raw_writew(val >> 16, base + addr + 2);
+}
+
+#define ALL_ERROR (TMIO_STAT_CMD_IDX_ERR | TMIO_STAT_CRCFAIL | \
+ TMIO_STAT_STOPBIT_ERR | TMIO_STAT_DATATIMEOUT | \
+ TMIO_STAT_RXOVERFLOW | TMIO_STAT_TXUNDERRUN | \
+ TMIO_STAT_CMDTIMEOUT | TMIO_STAT_ILL_ACCESS | \
+ TMIO_STAT_ILL_FUNC)
+
+static int sdhi_intr(void __iomem *base)
+{
+ unsigned long state = sd_ctrl_read32(base, CTL_STATUS);
+
+ if (state & ALL_ERROR) {
+ sd_ctrl_write32(base, CTL_STATUS, ~ALL_ERROR);
+ sd_ctrl_write32(base, CTL_IRQ_MASK,
+ ALL_ERROR |
+ sd_ctrl_read32(base, CTL_IRQ_MASK));
+ return -EINVAL;
+ }
+ if (state & TMIO_STAT_CMDRESPEND) {
+ sd_ctrl_write32(base, CTL_STATUS, ~TMIO_STAT_CMDRESPEND);
+ sd_ctrl_write32(base, CTL_IRQ_MASK,
+ TMIO_STAT_CMDRESPEND |
+ sd_ctrl_read32(base, CTL_IRQ_MASK));
+ return 0;
+ }
+ if (state & TMIO_STAT_RXRDY) {
+ sd_ctrl_write32(base, CTL_STATUS, ~TMIO_STAT_RXRDY);
+ sd_ctrl_write32(base, CTL_IRQ_MASK,
+ TMIO_STAT_RXRDY | TMIO_STAT_TXUNDERRUN |
+ sd_ctrl_read32(base, CTL_IRQ_MASK));
+ return 0;
+ }
+ if (state & TMIO_STAT_DATAEND) {
+ sd_ctrl_write32(base, CTL_STATUS, ~TMIO_STAT_DATAEND);
+ sd_ctrl_write32(base, CTL_IRQ_MASK,
+ TMIO_STAT_DATAEND |
+ sd_ctrl_read32(base, CTL_IRQ_MASK));
+ return 0;
+ }
+
+ return -EAGAIN;
+}
+
+static int sdhi_boot_wait_resp_end(void __iomem *base)
+{
+ int err = -EAGAIN, timeout = 10000000;
+
+ while (timeout--) {
+ err = sdhi_intr(base);
+ if (err != -EAGAIN)
+ break;
+ udelay(1);
+ }
+
+ return err;
+}
+
+/* SDHI_CLK_CTRL */
+#define CLK_MMC_ENABLE (1 << 8)
+#define CLK_MMC_INIT (1 << 6) /* clk / 256 */
+
+static void sdhi_boot_mmc_clk_stop(void __iomem *base)
+{
+ sd_ctrl_write16(base, CTL_CLK_AND_WAIT_CTL, 0x0000);
+ msleep(10);
+ sd_ctrl_write16(base, CTL_SD_CARD_CLK_CTL, ~CLK_MMC_ENABLE &
+ sd_ctrl_read16(base, CTL_SD_CARD_CLK_CTL));
+ msleep(10);
+}
+
+static void sdhi_boot_mmc_clk_start(void __iomem *base)
+{
+ sd_ctrl_write16(base, CTL_SD_CARD_CLK_CTL, CLK_MMC_ENABLE |
+ sd_ctrl_read16(base, CTL_SD_CARD_CLK_CTL));
+ msleep(10);
+ sd_ctrl_write16(base, CTL_CLK_AND_WAIT_CTL, CLK_MMC_ENABLE);
+ msleep(10);
+}
+
+static void sdhi_boot_reset(void __iomem *base)
+{
+ sd_ctrl_write16(base, CTL_RESET_SD, 0x0000);
+ msleep(10);
+ sd_ctrl_write16(base, CTL_RESET_SD, 0x0001);
+ msleep(10);
+}
+
+/* Set MMC clock / power.
+ * Note: This controller uses a simple divider scheme therefore it cannot
+ * run a MMC card at full speed (20MHz). The max clock is 24MHz on SD, but as
+ * MMC wont run that fast, it has to be clocked at 12MHz which is the next
+ * slowest setting.
+ */
+static int sdhi_boot_mmc_set_ios(void __iomem *base, struct mmc_ios *ios)
+{
+ if (sd_ctrl_read32(base, CTL_STATUS) & TMIO_STAT_CMD_BUSY)
+ return -EBUSY;
+
+ if (ios->clock)
+ sd_ctrl_write16(base, CTL_SD_CARD_CLK_CTL,
+ ios->clock | CLK_MMC_ENABLE);
+
+ /* Power sequence - OFF -> ON -> UP */
+ switch (ios->power_mode) {
+ case MMC_POWER_OFF: /* power down SD bus */
+ sdhi_boot_mmc_clk_stop(base);
+ break;
+ case MMC_POWER_ON: /* power up SD bus */
+ break;
+ case MMC_POWER_UP: /* start bus clock */
+ sdhi_boot_mmc_clk_start(base);
+ break;
+ }
+
+ switch (ios->bus_width) {
+ case MMC_BUS_WIDTH_1:
+ sd_ctrl_write16(base, CTL_SD_MEM_CARD_OPT, 0x80e0);
+ break;
+ case MMC_BUS_WIDTH_4:
+ sd_ctrl_write16(base, CTL_SD_MEM_CARD_OPT, 0x00e0);
+ break;
+ }
+
+ /* Let things settle. delay taken from winCE driver */
+ udelay(140);
+
+ return 0;
+}
+
+/* These are the bitmasks the tmio chip requires to implement the MMC response
+ * types. Note that R1 and R6 are the same in this scheme. */
+#define RESP_NONE 0x0300
+#define RESP_R1 0x0400
+#define RESP_R1B 0x0500
+#define RESP_R2 0x0600
+#define RESP_R3 0x0700
+#define DATA_PRESENT 0x0800
+#define TRANSFER_READ 0x1000
+
+static int sdhi_boot_request(void __iomem *base, struct mmc_command *cmd)
+{
+ int err, c = cmd->opcode;
+
+ switch (mmc_resp_type(cmd)) {
+ case MMC_RSP_NONE: c |= RESP_NONE; break;
+ case MMC_RSP_R1: c |= RESP_R1; break;
+ case MMC_RSP_R1B: c |= RESP_R1B; break;
+ case MMC_RSP_R2: c |= RESP_R2; break;
+ case MMC_RSP_R3: c |= RESP_R3; break;
+ default:
+ return -EINVAL;
+ }
+
+ /* No interrupts so this may not be cleared */
+ sd_ctrl_write32(base, CTL_STATUS, ~TMIO_STAT_CMDRESPEND);
+
+ sd_ctrl_write32(base, CTL_IRQ_MASK, TMIO_STAT_CMDRESPEND |
+ sd_ctrl_read32(base, CTL_IRQ_MASK));
+ sd_ctrl_write32(base, CTL_ARG_REG, cmd->arg);
+ sd_ctrl_write16(base, CTL_SD_CMD, c);
+
+
+ sd_ctrl_write32(base, CTL_IRQ_MASK,
+ ~(TMIO_STAT_CMDRESPEND | ALL_ERROR) &
+ sd_ctrl_read32(base, CTL_IRQ_MASK));
+
+ err = sdhi_boot_wait_resp_end(base);
+ if (err)
+ return err;
+
+ cmd->resp[0] = sd_ctrl_read32(base, CTL_RESPONSE);
+
+ return 0;
+}
+
+static int sdhi_boot_do_read_single(void __iomem *base, int high_capacity,
+ unsigned long block, unsigned short *buf)
+{
+ int err, i;
+
+ /* CMD17 - Read */
+ {
+ struct mmc_command cmd;
+
+ cmd.opcode = MMC_READ_SINGLE_BLOCK | \
+ TRANSFER_READ | DATA_PRESENT;
+ if (high_capacity)
+ cmd.arg = block;
+ else
+ cmd.arg = block * TMIO_BBS;
+ cmd.flags = MMC_RSP_R1;
+ err = sdhi_boot_request(base, &cmd);
+ if (err)
+ return err;
+ }
+
+ sd_ctrl_write32(base, CTL_IRQ_MASK,
+ ~(TMIO_STAT_DATAEND | TMIO_STAT_RXRDY |
+ TMIO_STAT_TXUNDERRUN) &
+ sd_ctrl_read32(base, CTL_IRQ_MASK));
+ err = sdhi_boot_wait_resp_end(base);
+ if (err)
+ return err;
+
+ sd_ctrl_write16(base, CTL_SD_XFER_LEN, TMIO_BBS);
+ for (i = 0; i < TMIO_BBS / sizeof(*buf); i++)
+ *buf++ = sd_ctrl_read16(base, RESP_CMD12);
+
+ err = sdhi_boot_wait_resp_end(base);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+int sdhi_boot_do_read(void __iomem *base, int high_capacity,
+ unsigned long offset, unsigned short count,
+ unsigned short *buf)
+{
+ unsigned long i;
+ int err = 0;
+
+ for (i = 0; i < count; i++) {
+ err = sdhi_boot_do_read_single(base, high_capacity, offset + i,
+ buf + (i * TMIO_BBS /
+ sizeof(*buf)));
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+#define VOLTAGES (MMC_VDD_32_33 | MMC_VDD_33_34)
+
+int sdhi_boot_init(void __iomem *base)
+{
+ bool sd_v2 = false, sd_v1_0 = false;
+ unsigned short cid;
+ int err, high_capacity = 0;
+
+ sdhi_boot_mmc_clk_stop(base);
+ sdhi_boot_reset(base);
+
+ /* mmc0: clock 400000Hz busmode 1 powermode 2 cs 0 Vdd 21 width 0 timing 0 */
+ {
+ struct mmc_ios ios;
+ ios.power_mode = MMC_POWER_ON;
+ ios.bus_width = MMC_BUS_WIDTH_1;
+ ios.clock = CLK_MMC_INIT;
+ err = sdhi_boot_mmc_set_ios(base, &ios);
+ if (err)
+ return err;
+ }
+
+ /* CMD0 */
+ {
+ struct mmc_command cmd;
+ msleep(1);
+ cmd.opcode = MMC_GO_IDLE_STATE;
+ cmd.arg = 0;
+ cmd.flags = MMC_RSP_NONE;
+ err = sdhi_boot_request(base, &cmd);
+ if (err)
+ return err;
+ msleep(2);
+ }
+
+ /* CMD8 - Test for SD version 2 */
+ {
+ struct mmc_command cmd;
+ cmd.opcode = SD_SEND_IF_COND;
+ cmd.arg = (VOLTAGES != 0) << 8 | 0xaa;
+ cmd.flags = MMC_RSP_R1;
+ err = sdhi_boot_request(base, &cmd); /* Ignore error */
+ if ((cmd.resp[0] & 0xff) == 0xaa)
+ sd_v2 = true;
+ }
+
+ /* CMD55 - Get OCR (SD) */
+ {
+ int timeout = 1000;
+ struct mmc_command cmd;
+
+ cmd.arg = 0;
+
+ do {
+ cmd.opcode = MMC_APP_CMD;
+ cmd.flags = MMC_RSP_R1;
+ cmd.arg = 0;
+ err = sdhi_boot_request(base, &cmd);
+ if (err)
+ break;
+
+ cmd.opcode = SD_APP_OP_COND;
+ cmd.flags = MMC_RSP_R3;
+ cmd.arg = (VOLTAGES & 0xff8000);
+ if (sd_v2)
+ cmd.arg |= OCR_HCS;
+ cmd.arg |= OCR_FASTBOOT;
+ err = sdhi_boot_request(base, &cmd);
+ if (err)
+ break;
+
+ msleep(1);
+ } while((!(cmd.resp[0] & OCR_BUSY)) && --timeout);
+
+ if (!err && timeout) {
+ if (!sd_v2)
+ sd_v1_0 = true;
+ high_capacity = (cmd.resp[0] & OCR_HCS) == OCR_HCS;
+ }
+ }
+
+ /* CMD1 - Get OCR (MMC) */
+ if (!sd_v2 && !sd_v1_0) {
+ int timeout = 1000;
+ struct mmc_command cmd;
+
+ do {
+ cmd.opcode = MMC_SEND_OP_COND;
+ cmd.arg = VOLTAGES | OCR_HCS;
+ cmd.flags = MMC_RSP_R3;
+ err = sdhi_boot_request(base, &cmd);
+ if (err)
+ return err;
+
+ msleep(1);
+ } while((!(cmd.resp[0] & OCR_BUSY)) && --timeout);
+
+ if (!timeout)
+ return -EAGAIN;
+
+ high_capacity = (cmd.resp[0] & OCR_HCS) == OCR_HCS;
+ }
+
+ /* CMD2 - Get CID */
+ {
+ struct mmc_command cmd;
+ cmd.opcode = MMC_ALL_SEND_CID;
+ cmd.arg = 0;
+ cmd.flags = MMC_RSP_R2;
+ err = sdhi_boot_request(base, &cmd);
+ if (err)
+ return err;
+ }
+
+ /* CMD3
+ * MMC: Set the relative address
+ * SD: Get the relative address
+ * Also puts the card into the standby state
+ */
+ {
+ struct mmc_command cmd;
+ cmd.opcode = MMC_SET_RELATIVE_ADDR;
+ cmd.arg = 0;
+ cmd.flags = MMC_RSP_R1;
+ err = sdhi_boot_request(base, &cmd);
+ if (err)
+ return err;
+ cid = cmd.resp[0] >> 16;
+ }
+
+ /* CMD9 - Get CSD */
+ {
+ struct mmc_command cmd;
+ cmd.opcode = MMC_SEND_CSD;
+ cmd.arg = cid << 16;
+ cmd.flags = MMC_RSP_R2;
+ err = sdhi_boot_request(base, &cmd);
+ if (err)
+ return err;
+ }
+
+ /* CMD7 - Select the card */
+ {
+ struct mmc_command cmd;
+ cmd.opcode = MMC_SELECT_CARD;
+ //cmd.arg = rca << 16;
+ cmd.arg = cid << 16;
+ //cmd.flags = MMC_RSP_R1B;
+ cmd.flags = MMC_RSP_R1;
+ err = sdhi_boot_request(base, &cmd);
+ if (err)
+ return err;
+ }
+
+ /* CMD16 - Set the block size */
+ {
+ struct mmc_command cmd;
+ cmd.opcode = MMC_SET_BLOCKLEN;
+ cmd.arg = TMIO_BBS;
+ cmd.flags = MMC_RSP_R1;
+ err = sdhi_boot_request(base, &cmd);
+ if (err)
+ return err;
+ }
+
+ return high_capacity;
+}
new file mode 100644
@@ -0,0 +1,11 @@
+#ifndef SDHI_MOBILE_H
+#define SDHI_MOBILE_H
+
+#include <linux/compiler.h>
+
+int sdhi_boot_do_read(void __iomem *base, int high_capacity,
+ unsigned long offset, unsigned short count,
+ unsigned short *buf);
+int sdhi_boot_init(void __iomem *base);
+
+#endif
new file mode 100644
@@ -0,0 +1,21 @@
+#ifndef SDHI_SH7372_H
+#define SDHI_SH7372_H
+
+#define SDGENCNTA 0xfe40009c
+
+/* The countdown of SDGENCNTA is controlled by
+ * ZB3D2CLK which runs at 149.5MHz.
+ * That is 149.5ticks/us. Approximate this as 150ticks/us.
+ */
+static void udelay(int us)
+{
+ __raw_writel(us * 150, SDGENCNTA);
+ while(__raw_readl(SDGENCNTA)) ;
+}
+
+static void msleep(int ms)
+{
+ udelay(ms * 1000);
+}
+
+#endif
new file mode 100644
@@ -0,0 +1,16 @@
+#ifndef SDHI_H
+#define SDHI_H
+
+/**************************************************
+ *
+ * CPU specific settings
+ *
+ **************************************************/
+
+#ifdef CONFIG_ARCH_SH7372
+#include "mach/sdhi-sh7372.h"
+#else
+#error "unsupported CPU."
+#endif
+
+#endif /* SDHI_H */