[U-Boot] [PATCH 2/4] mmc: Implement card detection.

Thierry Reding
2011-12-05T08:23:42Z

Check for card detect each time an MMC/SD device is initialized. If card
detection is not implemented, this code behaves as before and continues
assuming a card is present. If no card is detected, has_init is reset
for the MMC/SD device (to force initialization next time) and an error
is returned.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
---
drivers/mmc/arm_pl180_mmci.c | 1 +
drivers/mmc/bfin_sdh.c | 1 +
drivers/mmc/davinci_mmc.c | 1 +
drivers/mmc/ftsdc010_esdhc.c | 1 +
drivers/mmc/gen_atmel_mci.c | 1 +
drivers/mmc/mmc.c | 18 ++++++++++++++++++
drivers/mmc/mmc_spi.c | 1 +
drivers/mmc/mxcmmc.c | 1 +
drivers/mmc/mxsmmc.c | 1 +
drivers/mmc/omap_hsmmc.c | 1 +
drivers/mmc/pxa_mmc_gen.c | 1 +
drivers/mmc/s5p_mmc.c | 1 +
drivers/mmc/sdhci.c | 1 +
drivers/mmc/sh_mmcif.c | 1 +
include/mmc.h | 2 ++
15 files changed, 33 insertions(+), 0 deletions(-)

diff --git a/drivers/mmc/arm_pl180_mmci.c b/drivers/mmc/arm_pl180_mmci.c
index e6467a2..09d443e 100644
--- a/drivers/mmc/arm_pl180_mmci.c
+++ b/drivers/mmc/arm_pl180_mmci.c
@@ -385,6 +385,7 @@ static int arm_pl180_mmci_host_init(struct mmc *dev)
dev->send_cmd = host_request;
dev->set_ios = host_set_ios;
dev->init = mmc_host_reset;
+ dev->getcd = NULL;
dev->host_caps = 0;
dev->voltages = VOLTAGE_WINDOW_MMC;
dev->f_min = dev->clock;
diff --git a/drivers/mmc/bfin_sdh.c b/drivers/mmc/bfin_sdh.c
index bc9057f..08fc5c1 100644
--- a/drivers/mmc/bfin_sdh.c
+++ b/drivers/mmc/bfin_sdh.c
@@ -250,6 +250,7 @@ int bfin_mmc_init(bd_t *bis)
mmc->send_cmd = bfin_sdh_request;
mmc->set_ios = bfin_sdh_set_ios;
mmc->init = bfin_sdh_init;
+ mmc->getcd = NULL;
mmc->host_caps = MMC_MODE_4BIT;

mmc->voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
diff --git a/drivers/mmc/davinci_mmc.c b/drivers/mmc/davinci_mmc.c
index ce96736..ee8f261 100644
--- a/drivers/mmc/davinci_mmc.c
+++ b/drivers/mmc/davinci_mmc.c
@@ -387,6 +387,7 @@ int davinci_mmc_init(bd_t *bis, struct davinci_mmc *host)
mmc->send_cmd = dmmc_send_cmd;
mmc->set_ios = dmmc_set_ios;
mmc->init = dmmc_init;
+ mmc->getcd = NULL;

mmc->f_min = 200000;
mmc->f_max = 25000000;
diff --git a/drivers/mmc/ftsdc010_esdhc.c b/drivers/mmc/ftsdc010_esdhc.c
index e38dd87..0eb7196 100644
--- a/drivers/mmc/ftsdc010_esdhc.c
+++ b/drivers/mmc/ftsdc010_esdhc.c
@@ -645,6 +645,7 @@ int ftsdc010_mmc_init(int dev_index)
mmc->send_cmd = ftsdc010_request;
mmc->set_ios = ftsdc010_set_ios;
mmc->init = ftsdc010_core_init;
+ mmc->getcd = NULL;

mmc->voltages = MMC_VDD_32_33 | MMC_VDD_33_34;

diff --git a/drivers/mmc/gen_atmel_mci.c b/drivers/mmc/gen_atmel_mci.c
index f346b24..4968c5e 100644
--- a/drivers/mmc/gen_atmel_mci.c
+++ b/drivers/mmc/gen_atmel_mci.c
@@ -337,6 +337,7 @@ int atmel_mci_init(void *regs)
mmc->send_cmd = mci_send_cmd;
mmc->set_ios = mci_set_ios;
mmc->init = mci_init;
+ mmc->getcd = NULL;

/* need to be able to pass these in on a board by board basis */
mmc->voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 936259f..cf06d05 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -674,6 +674,18 @@ int mmc_switch_part(int dev_num, unsigned int part_num)
| (part_num & PART_ACCESS_MASK));
}

+int mmc_getcd(struct mmc *mmc)
+{
+ int cd;
+
+ cd = board_mmc_getcd(mmc);
+
+ if ((cd < 0) && mmc->getcd)
+ cd = mmc->getcd(mmc);
+
+ return cd;
+}
+
int sd_switch(struct mmc *mmc, int mode, int group, u8 value, u8 *resp)
{
struct mmc_cmd cmd;
@@ -1192,6 +1204,12 @@ int mmc_init(struct mmc *mmc)
{
int err, retry = 3;

+ if (mmc_getcd(mmc) == 0) {
+ mmc->has_init = 0;
+ printf("MMC: no card present\n");
+ return NO_CARD_ERR;
+ }
+
if (mmc->has_init)
return 0;

diff --git a/drivers/mmc/mmc_spi.c b/drivers/mmc/mmc_spi.c
index 49fb9e0..de43a85 100644
--- a/drivers/mmc/mmc_spi.c
+++ b/drivers/mmc/mmc_spi.c
@@ -272,6 +272,7 @@ struct mmc *mmc_spi_init(uint bus, uint cs, uint speed, uint mode)
mmc->send_cmd = mmc_spi_request;
mmc->set_ios = mmc_spi_set_ios;
mmc->init = mmc_spi_init_p;
+ mmc->getcd = NULL;
mmc->host_caps = MMC_MODE_SPI;

mmc->voltages = MMC_SPI_VOLTAGE;
diff --git a/drivers/mmc/mxcmmc.c b/drivers/mmc/mxcmmc.c
index ab1fc82..8afb221 100644
--- a/drivers/mmc/mxcmmc.c
+++ b/drivers/mmc/mxcmmc.c
@@ -500,6 +500,7 @@ static int mxcmci_initialize(bd_t *bis)
mmc->send_cmd = mxcmci_request;
mmc->set_ios = mxcmci_set_ios;
mmc->init = mxcmci_init;
+ mmc->getcd = NULL;
mmc->host_caps = MMC_MODE_4BIT;

host->base = (struct mxcmci_regs *)CONFIG_MXC_MCI_REGS_BASE;
diff --git a/drivers/mmc/mxsmmc.c b/drivers/mmc/mxsmmc.c
index 2a9949e..5f87a1e 100644
--- a/drivers/mmc/mxsmmc.c
+++ b/drivers/mmc/mxsmmc.c
@@ -329,6 +329,7 @@ int mxsmmc_initialize(bd_t *bis, int id, int (*wp)(int))
mmc->send_cmd = mxsmmc_send_cmd;
mmc->set_ios = mxsmmc_set_ios;
mmc->init = mxsmmc_init;
+ mmc->getcd = NULL;
mmc->priv = priv;

mmc->voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
diff --git a/drivers/mmc/omap_hsmmc.c b/drivers/mmc/omap_hsmmc.c
index c38b9e6..ef64e37 100644
--- a/drivers/mmc/omap_hsmmc.c
+++ b/drivers/mmc/omap_hsmmc.c
@@ -472,6 +472,7 @@ int omap_mmc_init(int dev_index)
mmc->send_cmd = mmc_send_cmd;
mmc->set_ios = mmc_set_ios;
mmc->init = mmc_init_setup;
+ mmc->getcd = NULL;

switch (dev_index) {
case 0:
diff --git a/drivers/mmc/pxa_mmc_gen.c b/drivers/mmc/pxa_mmc_gen.c
index 28e37b4..979e0da 100644
--- a/drivers/mmc/pxa_mmc_gen.c
+++ b/drivers/mmc/pxa_mmc_gen.c
@@ -411,6 +411,7 @@ int pxa_mmc_register(int card_index)
mmc->send_cmd = pxa_mmc_request;
mmc->set_ios = pxa_mmc_set_ios;
mmc->init = pxa_mmc_init;
+ mmc->getcd = NULL;

mmc->voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
mmc->f_max = PXAMMC_MAX_SPEED;
diff --git a/drivers/mmc/s5p_mmc.c b/drivers/mmc/s5p_mmc.c
index 7786ecf..4ae3aaf 100644
--- a/drivers/mmc/s5p_mmc.c
+++ b/drivers/mmc/s5p_mmc.c
@@ -463,6 +463,7 @@ static int s5p_mmc_initialize(int dev_index, int bus_width)
mmc->send_cmd = mmc_send_cmd;
mmc->set_ios = mmc_set_ios;
mmc->init = mmc_core_init;
+ mmc->getcd = NULL;

mmc->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
if (bus_width == 8)
diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
index fce0ef0..fc904b5 100644
--- a/drivers/mmc/sdhci.c
+++ b/drivers/mmc/sdhci.c
@@ -390,6 +390,7 @@ int add_sdhci(struct sdhci_host *host, u32 max_clk, u32 min_clk)
mmc->send_cmd = sdhci_send_command;
mmc->set_ios = sdhci_set_ios;
mmc->init = sdhci_init;
+ mmc->getcd = NULL;

caps = sdhci_readl(host, SDHCI_CAPABILITIES);
#ifdef CONFIG_MMC_SDMA
diff --git a/drivers/mmc/sh_mmcif.c b/drivers/mmc/sh_mmcif.c
index 567e2cb..2835e24 100644
--- a/drivers/mmc/sh_mmcif.c
+++ b/drivers/mmc/sh_mmcif.c
@@ -598,6 +598,7 @@ int mmcif_mmc_init(void)
mmc->send_cmd = sh_mmcif_request;
mmc->set_ios = sh_mmcif_set_ios;
mmc->init = sh_mmcif_init;
+ mmc->getcd = NULL;
host->regs = (struct sh_mmcif_regs *)CONFIG_SH_MMCIF_ADDR;
host->clk = CONFIG_SH_MMCIF_CLK;
mmc->priv = host;
diff --git a/include/mmc.h b/include/mmc.h
index a850174..8744604 100644
--- a/include/mmc.h
+++ b/include/mmc.h
@@ -302,6 +302,7 @@ struct mmc {
struct mmc_cmd *cmd, struct mmc_data *data);
void (*set_ios)(struct mmc *mmc);
int (*init)(struct mmc *mmc);
+ int (*getcd)(struct mmc *mmc);
uint b_max;
};

@@ -316,6 +317,7 @@ void print_mmc_devices(char separator);
int get_mmc_num(void);
int board_mmc_getcd(struct mmc *mmc);
int mmc_switch_part(int dev_num, unsigned int part_num);
+int mmc_getcd(struct mmc *mmc);

#ifdef CONFIG_GENERIC_MMC
int atmel_mci_init(void *regs);
--
1.7.7.4