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-rw-r--r--cpu/arm_cortexa8/mx51/Makefile2
-rw-r--r--cpu/arm_cortexa8/mx51/speed.c38
-rw-r--r--drivers/mmc/fsl_esdhc.c149
-rw-r--r--include/asm-arm/global_data.h3
-rw-r--r--include/fsl_esdhc.h27
-rw-r--r--lib_arm/board.c3
6 files changed, 173 insertions, 49 deletions
diff --git a/cpu/arm_cortexa8/mx51/Makefile b/cpu/arm_cortexa8/mx51/Makefile
index 4d82293fa0..7cfaa2c130 100644
--- a/cpu/arm_cortexa8/mx51/Makefile
+++ b/cpu/arm_cortexa8/mx51/Makefile
@@ -27,7 +27,7 @@ include $(TOPDIR)/config.mk
LIB = $(obj)lib$(SOC).a
-COBJS = soc.o clock.o iomux.o timer.o
+COBJS = soc.o clock.o iomux.o timer.o speed.o
SOBJS = lowlevel_init.o
SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c)
diff --git a/cpu/arm_cortexa8/mx51/speed.c b/cpu/arm_cortexa8/mx51/speed.c
new file mode 100644
index 0000000000..10acbbffd1
--- /dev/null
+++ b/cpu/arm_cortexa8/mx51/speed.c
@@ -0,0 +1,38 @@
+/*
+ * (C) Copyright 2000-2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
+ * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/arch/imx-regs.h>
+
+int get_clocks(void)
+{
+ DECLARE_GLOBAL_DATA_PTR;
+
+#ifdef CONFIG_FSL_ESDHC
+ gd->sdhc_clk = mxc_get_clock(MXC_IPG_PERCLK);
+#endif
+ return 0;
+}
diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c
index c6e9e6e782..e665b5ebd8 100644
--- a/drivers/mmc/fsl_esdhc.c
+++ b/drivers/mmc/fsl_esdhc.c
@@ -37,7 +37,6 @@
#include <fdt_support.h>
#include <asm/io.h>
-
DECLARE_GLOBAL_DATA_PTR;
struct fsl_esdhc {
@@ -102,7 +101,8 @@ static int esdhc_setup_data(struct mmc *mmc, struct mmc_data *data)
{
uint wml_value;
int timeout;
- struct fsl_esdhc *regs = mmc->priv;
+ struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
+ struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
wml_value = data->blocksize/4;
@@ -112,24 +112,24 @@ static int esdhc_setup_data(struct mmc *mmc, struct mmc_data *data)
wml_value = 0x100000 | wml_value;
- out_be32(&regs->dsaddr, (u32)data->dest);
+ esdhc_write32(&regs->dsaddr, (u32)data->dest);
} else {
if (wml_value > 0x80)
wml_value = 0x80;
- if ((in_be32(&regs->prsstat) & PRSSTAT_WPSPL) == 0) {
+ if ((esdhc_read32(&regs->prsstat) & PRSSTAT_WPSPL) == 0) {
printf("\nThe SD card is locked. Can not write to a locked card.\n\n");
return TIMEOUT;
}
wml_value = wml_value << 16 | 0x10;
- out_be32(&regs->dsaddr, (u32)data->src);
+ esdhc_write32(&regs->dsaddr, (u32)data->src);
}
- out_be32(&regs->wml, wml_value);
+ esdhc_write32(&regs->wml, wml_value);
- out_be32(&regs->blkattr, data->blocks << 16 | data->blocksize);
+ esdhc_write32(&regs->blkattr, data->blocks << 16 | data->blocksize);
/* Calculate the timeout period for data transactions */
- timeout = __ilog2(mmc->tran_speed/10);
+ timeout = fls(mmc->tran_speed/10) - 1;
timeout -= 13;
if (timeout > 14)
@@ -138,7 +138,7 @@ static int esdhc_setup_data(struct mmc *mmc, struct mmc_data *data)
if (timeout < 0)
timeout = 0;
- clrsetbits_be32(&regs->sysctl, SYSCTL_TIMEOUT_MASK, timeout << 16);
+ esdhc_clrsetbits32(&regs->sysctl, SYSCTL_TIMEOUT_MASK, timeout << 16);
return 0;
}
@@ -153,17 +153,20 @@ esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
{
uint xfertyp;
uint irqstat;
- volatile struct fsl_esdhc *regs = mmc->priv;
+ struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
+ volatile struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
- out_be32(&regs->irqstat, -1);
+ esdhc_write32(&regs->irqstat, -1);
sync();
/* Wait for the bus to be idle */
- while ((in_be32(&regs->prsstat) & PRSSTAT_CICHB) ||
- (in_be32(&regs->prsstat) & PRSSTAT_CIDHB));
+ while ((esdhc_read32(&regs->prsstat) & PRSSTAT_CICHB) ||
+ (esdhc_read32(&regs->prsstat) & PRSSTAT_CIDHB))
+ ;
- while (in_be32(&regs->prsstat) & PRSSTAT_DLA);
+ while (esdhc_read32(&regs->prsstat) & PRSSTAT_DLA)
+ ;
/* Wait at least 8 SD clock cycles before the next command */
/*
@@ -185,14 +188,15 @@ esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
xfertyp = esdhc_xfertyp(cmd, data);
/* Send the command */
- out_be32(&regs->cmdarg, cmd->cmdarg);
- out_be32(&regs->xfertyp, xfertyp);
+ esdhc_write32(&regs->cmdarg, cmd->cmdarg);
+ esdhc_write32(&regs->xfertyp, xfertyp);
/* Wait for the command to complete */
- while (!(in_be32(&regs->irqstat) & IRQSTAT_CC));
+ while (!(esdhc_read32(&regs->irqstat) & IRQSTAT_CC))
+ ;
- irqstat = in_be32(&regs->irqstat);
- out_be32(&regs->irqstat, irqstat);
+ irqstat = esdhc_read32(&regs->irqstat);
+ esdhc_write32(&regs->irqstat, irqstat);
if (irqstat & CMD_ERR)
return COMM_ERR;
@@ -204,21 +208,21 @@ esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
if (cmd->resp_type & MMC_RSP_136) {
u32 cmdrsp3, cmdrsp2, cmdrsp1, cmdrsp0;
- cmdrsp3 = in_be32(&regs->cmdrsp3);
- cmdrsp2 = in_be32(&regs->cmdrsp2);
- cmdrsp1 = in_be32(&regs->cmdrsp1);
- cmdrsp0 = in_be32(&regs->cmdrsp0);
+ cmdrsp3 = esdhc_read32(&regs->cmdrsp3);
+ cmdrsp2 = esdhc_read32(&regs->cmdrsp2);
+ cmdrsp1 = esdhc_read32(&regs->cmdrsp1);
+ cmdrsp0 = esdhc_read32(&regs->cmdrsp0);
cmd->response[0] = (cmdrsp3 << 8) | (cmdrsp2 >> 24);
cmd->response[1] = (cmdrsp2 << 8) | (cmdrsp1 >> 24);
cmd->response[2] = (cmdrsp1 << 8) | (cmdrsp0 >> 24);
cmd->response[3] = (cmdrsp0 << 8);
} else
- cmd->response[0] = in_be32(&regs->cmdrsp0);
+ cmd->response[0] = esdhc_read32(&regs->cmdrsp0);
/* Wait until all of the blocks are transferred */
if (data) {
do {
- irqstat = in_be32(&regs->irqstat);
+ irqstat = esdhc_read32(&regs->irqstat);
if (irqstat & DATA_ERR)
return COMM_ERR;
@@ -226,10 +230,10 @@ esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
if (irqstat & IRQSTAT_DTOE)
return TIMEOUT;
} while (!(irqstat & IRQSTAT_TC) &&
- (in_be32(&regs->prsstat) & PRSSTAT_DLA));
+ (esdhc_read32(&regs->prsstat) & PRSSTAT_DLA));
}
- out_be32(&regs->irqstat, -1);
+ esdhc_write32(&regs->irqstat, -1);
return 0;
}
@@ -238,9 +242,13 @@ void set_sysctl(struct mmc *mmc, uint clock)
{
int sdhc_clk = gd->sdhc_clk;
int div, pre_div;
- volatile struct fsl_esdhc *regs = mmc->priv;
+ struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
+ volatile struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
uint clk;
+ if (clock < mmc->f_min)
+ clock = mmc->f_min;
+
if (sdhc_clk / 16 > clock) {
for (pre_div = 2; pre_div < 256; pre_div *= 2)
if ((sdhc_clk / pre_div) <= (clock * 16))
@@ -257,67 +265,105 @@ void set_sysctl(struct mmc *mmc, uint clock)
clk = (pre_div << 8) | (div << 4);
- clrsetbits_be32(&regs->sysctl, SYSCTL_CLOCK_MASK, clk);
+ /* On imx the clock must be stopped before changing frequency */
+ if (cfg->clk_enable)
+ esdhc_clrbits32(&regs->sysctl, SYSCTL_CKEN);
+
+ esdhc_clrsetbits32(&regs->sysctl, SYSCTL_CLOCK_MASK, clk);
udelay(10000);
- setbits_be32(&regs->sysctl, SYSCTL_PEREN);
+ clk = SYSCTL_PEREN;
+ /* On imx systems the clock must be explicitely enabled */
+ if (cfg->clk_enable)
+ clk |= SYSCTL_CKEN;
+
+ esdhc_setbits32(&regs->sysctl, clk);
}
static void esdhc_set_ios(struct mmc *mmc)
{
- struct fsl_esdhc *regs = mmc->priv;
+ struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
+ struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
/* Set the clock speed */
set_sysctl(mmc, mmc->clock);
/* Set the bus width */
- clrbits_be32(&regs->proctl, PROCTL_DTW_4 | PROCTL_DTW_8);
+ esdhc_clrbits32(&regs->proctl, PROCTL_DTW_4 | PROCTL_DTW_8);
if (mmc->bus_width == 4)
- setbits_be32(&regs->proctl, PROCTL_DTW_4);
+ esdhc_setbits32(&regs->proctl, PROCTL_DTW_4);
else if (mmc->bus_width == 8)
- setbits_be32(&regs->proctl, PROCTL_DTW_8);
+ esdhc_setbits32(&regs->proctl, PROCTL_DTW_8);
+
}
static int esdhc_init(struct mmc *mmc)
{
- struct fsl_esdhc *regs = mmc->priv;
+ struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
+ struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
int timeout = 1000;
+ int ret = 0;
+ u8 card_absent;
/* Enable cache snooping */
- out_be32(&regs->scr, 0x00000040);
+ if (cfg && !cfg->no_snoop)
+ esdhc_write32(&regs->scr, 0x00000040);
+
+ /* Reset the entire host controller */
+ esdhc_write32(&regs->sysctl, SYSCTL_RSTA);
+
+ /* Wait until the controller is available */
+ while ((esdhc_read32(&regs->sysctl) & SYSCTL_RSTA) && --timeout)
+ udelay(1000);
- out_be32(&regs->sysctl, SYSCTL_HCKEN | SYSCTL_IPGEN);
+ esdhc_write32(&regs->sysctl, SYSCTL_HCKEN | SYSCTL_IPGEN);
/* Set the initial clock speed */
set_sysctl(mmc, 400000);
/* Disable the BRR and BWR bits in IRQSTAT */
- clrbits_be32(&regs->irqstaten, IRQSTATEN_BRR | IRQSTATEN_BWR);
+ esdhc_clrbits32(&regs->irqstaten, IRQSTATEN_BRR | IRQSTATEN_BWR);
/* Put the PROCTL reg back to the default */
- out_be32(&regs->proctl, PROCTL_INIT);
+ esdhc_write32(&regs->proctl, PROCTL_INIT);
- while (!(in_be32(&regs->prsstat) & PRSSTAT_CINS) && --timeout)
- udelay(1000);
+ /* Set timout to the maximum value */
+ esdhc_clrsetbits32(&regs->sysctl, SYSCTL_TIMEOUT_MASK, 14 << 16);
- if (timeout <= 0)
- return NO_CARD_ERR;
+ /* Check if there is a callback for detecting the card */
+ if (board_mmc_getcd(&card_absent, mmc)) {
+ timeout = 1000;
+ while (!(esdhc_read32(&regs->prsstat) & PRSSTAT_CINS) &&
+ --timeout)
+ udelay(1000);
- return 0;
+ if (timeout <= 0)
+ ret = NO_CARD_ERR;
+ } else {
+ if (card_absent)
+ ret = NO_CARD_ERR;
+ }
+
+ return ret;
}
-static int esdhc_initialize(bd_t *bis)
+int fsl_esdhc_initialize(bd_t *bis, struct fsl_esdhc_cfg *cfg)
{
- struct fsl_esdhc *regs = (struct fsl_esdhc *)CONFIG_SYS_FSL_ESDHC_ADDR;
+ struct fsl_esdhc *regs;
struct mmc *mmc;
u32 caps;
+ if (!cfg)
+ return -1;
+
mmc = malloc(sizeof(struct mmc));
sprintf(mmc->name, "FSL_ESDHC");
- mmc->priv = regs;
+ regs = (struct fsl_esdhc *)cfg->esdhc_base;
+
+ mmc->priv = cfg;
mmc->send_cmd = esdhc_send_cmd;
mmc->set_ios = esdhc_set_ios;
mmc->init = esdhc_init;
@@ -346,9 +392,15 @@ static int esdhc_initialize(bd_t *bis)
int fsl_esdhc_mmc_init(bd_t *bis)
{
- return esdhc_initialize(bis);
+ struct fsl_esdhc_cfg *cfg;
+
+ cfg = malloc(sizeof(struct fsl_esdhc_cfg));
+ memset(cfg, 0, sizeof(struct fsl_esdhc_cfg));
+ cfg->esdhc_base = CONFIG_SYS_FSL_ESDHC_ADDR;
+ return fsl_esdhc_initialize(bis, cfg);
}
+#ifdef CONFIG_OF_LIBFDT
void fdt_fixup_esdhc(void *blob, bd_t *bd)
{
const char *compat = "fsl,esdhc";
@@ -365,3 +417,4 @@ out:
do_fixup_by_compat(blob, compat, "status", status,
strlen(status) + 1, 1);
}
+#endif
diff --git a/include/asm-arm/global_data.h b/include/asm-arm/global_data.h
index 8115a24b78..02cfe4584a 100644
--- a/include/asm-arm/global_data.h
+++ b/include/asm-arm/global_data.h
@@ -44,6 +44,9 @@ typedef struct global_data {
#ifdef CONFIG_VFD
unsigned char vfd_type; /* display type */
#endif
+#ifdef CONFIG_FSL_ESDHC
+ unsigned long sdhc_clk;
+#endif
#if 0
unsigned long cpu_clk; /* CPU clock in Hz! */
unsigned long bus_clk;
diff --git a/include/fsl_esdhc.h b/include/fsl_esdhc.h
index eac6a2bd48..01b7dec188 100644
--- a/include/fsl_esdhc.h
+++ b/include/fsl_esdhc.h
@@ -27,12 +27,15 @@
#define __FSL_ESDHC_H__
#include <asm/errno.h>
+#include <asm/byteorder.h>
/* FSL eSDHC-specific constants */
#define SYSCTL 0x0002e02c
#define SYSCTL_INITA 0x08000000
#define SYSCTL_TIMEOUT_MASK 0x000f0000
#define SYSCTL_CLOCK_MASK 0x0000fff0
+#define SYSCTL_RSTA 0x01000000
+#define SYSCTL_CKEN 0x00000008
#define SYSCTL_PEREN 0x00000004
#define SYSCTL_HCKEN 0x00000002
#define SYSCTL_IPGEN 0x00000001
@@ -142,8 +145,32 @@
#define ESDHC_HOSTCAPBLT_DMAS 0x00400000
#define ESDHC_HOSTCAPBLT_HSS 0x00200000
+struct fsl_esdhc_cfg {
+ u32 esdhc_base;
+ u32 no_snoop;
+ u32 clk_enable;
+};
+
+/* Select the correct accessors depending on endianess */
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define esdhc_read32 in_le32
+#define esdhc_write32 out_le32
+#define esdhc_clrsetbits32 clrsetbits_le32
+#define esdhc_clrbits32 clrbits_le32
+#define esdhc_setbits32 setbits_le32
+#elif __BYTE_ORDER == __BIG_ENDIAN
+#define esdhc_read32 in_be32
+#define esdhc_write32 out_be32
+#define esdhc_clrsetbits32 clrsetbits_be32
+#define esdhc_clrbits32 clrbits_be32
+#define esdhc_setbits32 setbits_be32
+#else
+#error "Endianess is not defined: please fix to continue"
+#endif
+
#ifdef CONFIG_FSL_ESDHC
int fsl_esdhc_mmc_init(bd_t *bis);
+int fsl_esdhc_initialize(bd_t *bis, struct fsl_esdhc_cfg *cfg);
void fdt_fixup_esdhc(void *blob, bd_t *bd);
#else
static inline int fsl_esdhc_mmc_init(bd_t *bis) { return -ENOSYS; }
diff --git a/lib_arm/board.c b/lib_arm/board.c
index e148739152..f5660a985b 100644
--- a/lib_arm/board.c
+++ b/lib_arm/board.c
@@ -243,6 +243,9 @@ init_fnc_t *init_sequence[] = {
interrupt_init, /* set up exceptions */
#endif
timer_init, /* initialize timer */
+#ifdef CONFIG_FSL_ESDHC
+ get_clocks,
+#endif
env_init, /* initialize environment */
init_baudrate, /* initialze baudrate settings */
serial_init, /* serial communications setup */
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