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mxs: mmc: Allow overriding default card detect implementation
Some MXS based boards do not implement the card-detect signal. Allow user to specify alternate card-detect implementation. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Otavio Salvador <otavio@ossystems.com.br> Cc: Fabio Estevam <fabio.estevam@freescale.com> Cc: Stefano Babic <sbabic@denx.de>
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parent
8000d8a826
commit
90bc2bf297
6 changed files with 19 additions and 7 deletions
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@ -31,7 +31,7 @@ int mxs_wait_mask_clr(struct mxs_register_32 *reg,
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uint32_t mask,
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unsigned int timeout);
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int mxsmmc_initialize(bd_t *bis, int id, int (*wp)(int));
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int mxsmmc_initialize(bd_t *bis, int id, int (*wp)(int), int (*cd)(int));
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#ifdef CONFIG_SPL_BUILD
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@ -69,7 +69,7 @@ int board_init(void)
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#ifdef CONFIG_CMD_MMC
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int board_mmc_init(bd_t *bis)
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{
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return mxsmmc_initialize(bis, 0, NULL);
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return mxsmmc_initialize(bis, 0, NULL, NULL);
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}
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#endif
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@ -93,7 +93,7 @@ int board_mmc_init(bd_t *bis)
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/* Turn on the power to the card. */
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gpio_direction_output(MX28_PAD_PWM3__GPIO_3_28, 0);
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return mxsmmc_initialize(bis, 0, m28_mmc_wp);
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return mxsmmc_initialize(bis, 0, m28_mmc_wp, NULL);
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}
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#endif
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@ -94,7 +94,7 @@ int board_mmc_init(bd_t *bis)
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/* Configure MMC0 Power Enable */
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gpio_direction_output(MX28_PAD_PWM3__GPIO_3_28, 0);
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return mxsmmc_initialize(bis, 0, mx28evk_mmc_wp);
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return mxsmmc_initialize(bis, 0, mx28evk_mmc_wp, NULL);
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}
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#endif
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@ -78,7 +78,7 @@ int dram_init(void)
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#ifdef CONFIG_CMD_MMC
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int board_mmc_init(bd_t *bis)
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{
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return mxsmmc_initialize(bis, 0, NULL);
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return mxsmmc_initialize(bis, 0, NULL, NULL);
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}
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#endif
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@ -49,12 +49,23 @@ struct mxsmmc_priv {
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struct mxs_ssp_regs *regs;
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uint32_t buswidth;
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int (*mmc_is_wp)(int);
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int (*mmc_cd)(int);
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struct mxs_dma_desc *desc;
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};
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#define MXSMMC_MAX_TIMEOUT 10000
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#define MXSMMC_SMALL_TRANSFER 512
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static int mxsmmc_cd(struct mxsmmc_priv *priv)
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{
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struct mxs_ssp_regs *ssp_regs = priv->regs;
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if (priv->mmc_cd)
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return priv->mmc_cd(priv->id);
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return !(readl(&ssp_regs->hw_ssp_status) & SSP_STATUS_CARD_DETECT);
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}
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static int mxsmmc_send_cmd_pio(struct mxsmmc_priv *priv, struct mmc_data *data)
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{
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struct mxs_ssp_regs *ssp_regs = priv->regs;
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@ -166,7 +177,7 @@ mxsmmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
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}
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/* See if card is present */
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if (readl(&ssp_regs->hw_ssp_status) & SSP_STATUS_CARD_DETECT) {
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if (!mxsmmc_cd(priv)) {
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printf("MMC%d: No card detected!\n", mmc->block_dev.dev);
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return NO_CARD_ERR;
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}
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@ -357,7 +368,7 @@ static int mxsmmc_init(struct mmc *mmc)
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return 0;
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}
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int mxsmmc_initialize(bd_t *bis, int id, int (*wp)(int))
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int mxsmmc_initialize(bd_t *bis, int id, int (*wp)(int), int (*cd)(int))
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{
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struct mmc *mmc = NULL;
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struct mxsmmc_priv *priv = NULL;
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@ -395,6 +406,7 @@ int mxsmmc_initialize(bd_t *bis, int id, int (*wp)(int))
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return ret;
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priv->mmc_is_wp = wp;
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priv->mmc_cd = cd;
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priv->id = id;
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priv->regs = mxs_ssp_regs_by_bus(id);
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