[U-Boot] [PATCH 8/9] mxs: Fix MMC reset to avoid write errors and timeout in iMX23

Otavio Salvador
2013-01-22T01:47:28Z

This does the same reset mask as done in v3.7 Linux kernel code; it
fixed the saveenv command in mx23evk.

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
---
drivers/mmc/mxsmmc.c | 16 +++++++++++-----
1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/drivers/mmc/mxsmmc.c b/drivers/mmc/mxsmmc.c
index 618659e..0a3f0c4 100644
--- a/drivers/mmc/mxsmmc.c
+++ b/drivers/mmc/mxsmmc.c
@@ -354,11 +354,17 @@ static int mxsmmc_init(struct mmc *mmc)
/* Reset SSP */
mxs_reset_block(&ssp_regs->hw_ssp_ctrl0_reg);

- /* 8 bits word length in MMC mode */
- clrsetbits_le32(&ssp_regs->hw_ssp_ctrl1,
- SSP_CTRL1_SSP_MODE_MASK | SSP_CTRL1_WORD_LENGTH_MASK |
- SSP_CTRL1_DMA_ENABLE,
- SSP_CTRL1_SSP_MODE_SD_MMC | SSP_CTRL1_WORD_LENGTH_EIGHT_BITS);
+ /* Reset MMC */
+ writel(SSP_CTRL1_SSP_MODE_SD_MMC |
+ SSP_CTRL1_WORD_LENGTH_EIGHT_BITS |
+ SSP_CTRL1_DMA_ENABLE |
+ SSP_CTRL1_POLARITY |
+ SSP_CTRL1_RECV_TIMEOUT_IRQ_EN |
+ SSP_CTRL1_DATA_CRC_IRQ_EN |
+ SSP_CTRL1_DATA_TIMEOUT_IRQ_EN |
+ SSP_CTRL1_RESP_TIMEOUT_IRQ_EN |
+ SSP_CTRL1_RESP_ERR_IRQ_EN,
+ &ssp_regs->hw_ssp_ctrl1_set);

/* Set initial bit clock 400 KHz */
mxs_set_ssp_busclock(priv->id, 400);
--
1.8.1