diff options
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/sdhci-msm.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c index e6efbe6f270a..8f4026f6fed4 100644 --- a/drivers/mmc/host/sdhci-msm.c +++ b/drivers/mmc/host/sdhci-msm.c @@ -226,6 +226,22 @@ static const struct sdhci_msm_offset sdhci_msm_mci_offset = { .core_ddr_config_2 = 0x1bc, }; +struct sdhci_msm_variant_ops { + u32 (*msm_readl_relaxed)(struct sdhci_host *host, u32 offset); + void (*msm_writel_relaxed)(u32 val, struct sdhci_host *host, + u32 offset); +}; + +/* + * From V5, register spaces have changed. Wrap this info in a structure + * and choose the data_structure based on version info mentioned in DT. + */ +struct sdhci_msm_variant_info { + bool mci_removed; + const struct sdhci_msm_variant_ops *var_ops; + const struct sdhci_msm_offset *offset; +}; + struct sdhci_msm_host { struct platform_device *pdev; void __iomem *core_mem; /* MSM SDCC mapped address */ @@ -245,8 +261,45 @@ struct sdhci_msm_host { wait_queue_head_t pwr_irq_wait; bool pwr_irq_flag; u32 caps_0; + bool mci_removed; + const struct sdhci_msm_variant_ops *var_ops; + const struct sdhci_msm_offset *offset; }; +/* + * APIs to read/write to vendor specific registers which were there in the + * core_mem region before MCI was removed. + */ +static u32 sdhci_msm_mci_variant_readl_relaxed(struct sdhci_host *host, + u32 offset) +{ + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); + + return readl_relaxed(msm_host->core_mem + offset); +} + +static u32 sdhci_msm_v5_variant_readl_relaxed(struct sdhci_host *host, + u32 offset) +{ + return readl_relaxed(host->ioaddr + offset); +} + +static void sdhci_msm_mci_variant_writel_relaxed(u32 val, + struct sdhci_host *host, u32 offset) +{ + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); + + writel_relaxed(val, msm_host->core_mem + offset); +} + +static void sdhci_msm_v5_variant_writel_relaxed(u32 val, + struct sdhci_host *host, u32 offset) +{ + writel_relaxed(val, host->ioaddr + offset); +} + static unsigned int msm_get_clock_rate_for_bus_mode(struct sdhci_host *host, unsigned int clock) { @@ -1481,6 +1534,28 @@ static void sdhci_msm_set_regulator_caps(struct sdhci_msm_host *msm_host) pr_debug("%s: supported caps: 0x%08x\n", mmc_hostname(mmc), caps); } +static const struct sdhci_msm_variant_ops mci_var_ops = { + .msm_readl_relaxed = sdhci_msm_mci_variant_readl_relaxed, + .msm_writel_relaxed = sdhci_msm_mci_variant_writel_relaxed, +}; + +static const struct sdhci_msm_variant_ops v5_var_ops = { + .msm_readl_relaxed = sdhci_msm_v5_variant_readl_relaxed, + .msm_writel_relaxed = sdhci_msm_v5_variant_writel_relaxed, +}; + +static const struct sdhci_msm_variant_info sdhci_msm_mci_var = { + .mci_removed = false, + .var_ops = &mci_var_ops, + .offset = &sdhci_msm_mci_offset, +}; + +static const struct sdhci_msm_variant_info sdhci_msm_v5_var = { + .mci_removed = true, + .var_ops = &v5_var_ops, + .offset = &sdhci_msm_v5_offset, +}; + static const struct of_device_id sdhci_msm_dt_match[] = { { .compatible = "qcom,sdhci-msm-v4" }, {}, |