diff options
| author | Angelo Dureghello <angelo@sysam.it> | 2019-01-19 10:40:38 +0100 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2019-01-26 08:13:56 -0500 |
| commit | 1f15cb8f5b1b675426a7072d6c978e1c415c94c8 (patch) | |
| tree | 9bb48d3921148079b4073e97a13c74f6d03665dc /drivers/mmc | |
| parent | 293a172b67230e14c43f2b7a8b6f302b1d03ca4e (diff) | |
drivers: esdhc: add support for ColdFire mcf5441x family
This patch has been tested on the mcf54415-based stmark2
board. The eSDHC driver works reliably using DMA mode.
Signed-off-by: Angelo Dureghello <angelo@sysam.it>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/fsl_esdhc.c | 43 |
1 files changed, 42 insertions, 1 deletions
diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c index 84637313e0..b8171ba08b 100644 --- a/drivers/mmc/fsl_esdhc.c +++ b/drivers/mmc/fsl_esdhc.c @@ -384,6 +384,25 @@ static void check_and_invalidate_dcache_range invalidate_dcache_range(start, end); } +#ifdef CONFIG_MCF5441x +/* + * Swaps 32-bit words to little-endian byte order. + */ +static inline void sd_swap_dma_buff(struct mmc_data *data) +{ + int i, size = data->blocksize >> 2; + u32 *buffer = (u32 *)data->dest; + u32 sw; + + while (data->blocks--) { + for (i = 0; i < size; i++) { + sw = __sw32(*buffer); + *buffer++ = sw; + } + } +} +#endif + /* * Sends a command out on the bus. Takes the mmc pointer, * a command pointer, and an optional data pointer. @@ -546,8 +565,12 @@ static int esdhc_send_cmd_common(struct fsl_esdhc_priv *priv, struct mmc *mmc, * cache-fill during the DMA operations such as the * speculative pre-fetching etc. */ - if (data->flags & MMC_DATA_READ) + if (data->flags & MMC_DATA_READ) { check_and_invalidate_dcache_range(cmd, data); +#ifdef CONFIG_MCF5441x + sd_swap_dma_buff(data); +#endif + } #endif } @@ -1029,8 +1052,12 @@ static int esdhc_init_common(struct fsl_esdhc_priv *priv, struct mmc *mmc) /* Disable the BRR and BWR bits in IRQSTAT */ esdhc_clrbits32(®s->irqstaten, IRQSTATEN_BRR | IRQSTATEN_BWR); +#ifdef CONFIG_MCF5441x + esdhc_write32(®s->proctl, PROCTL_INIT | PROCTL_D3CD); +#else /* Put the PROCTL reg back to the default */ esdhc_write32(®s->proctl, PROCTL_INIT); +#endif /* Set timout to the maximum value */ esdhc_clrsetbits32(®s->sysctl, SYSCTL_TIMEOUT_MASK, 14 << 16); @@ -1138,6 +1165,11 @@ static int fsl_esdhc_init(struct fsl_esdhc_priv *priv, if (ret) return ret; +#ifdef CONFIG_MCF5441x + /* ColdFire, using SDHC_DATA[3] for card detection */ + esdhc_write32(®s->proctl, PROCTL_INIT | PROCTL_D3CD); +#endif + #ifndef CONFIG_FSL_USDHC esdhc_setbits32(®s->sysctl, SYSCTL_PEREN | SYSCTL_HCKEN | SYSCTL_IPGEN | SYSCTL_CKEN); @@ -1162,6 +1194,15 @@ static int fsl_esdhc_init(struct fsl_esdhc_priv *priv, voltage_caps = 0; caps = esdhc_read32(®s->hostcapblt); +#ifdef CONFIG_MCF5441x + /* + * MCF5441x RM declares in more points that sdhc clock speed must + * never exceed 25 Mhz. From this, the HS bit needs to be disabled + * from host capabilities. + */ + caps &= ~ESDHC_HOSTCAPBLT_HSS; +#endif + #ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC135 caps = caps & ~(ESDHC_HOSTCAPBLT_SRS | ESDHC_HOSTCAPBLT_VS18 | ESDHC_HOSTCAPBLT_VS30); |