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| author | Aniruddha Tvs Rao <anrao@nvidia.com> | 2021-04-07 12:46:17 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2021-04-12 14:52:29 +0300 |
| commit | 5ec6fa5a6dc5e42a4aa782f3a81d5f08b0fac1e6 (patch) | |
| tree | b74f09f511743e0186e202abad1fe121f087a4f4 /drivers/mmc/host/sdhci-tegra.c | |
| parent | baaaf55d99ef4485d4c9e371d92809f0cbd53b85 (diff) | |
| download | linux-5ec6fa5a6dc5e42a4aa782f3a81d5f08b0fac1e6.tar.xz | |
mmc: sdhci-tegra: Add required callbacks to set/clear CQE_EN bit
CMD8 is not supported with Command Queue Enabled. Add required callback
to clear CQE_EN and CQE_INTR fields in the host controller register
before sending CMD8. Add corresponding callback in the CQHCI resume path
to re-enable CQE_EN and CQE_INTR fields.
Reported-by: Kamal Mostafa <kamal@canonical.com>
Tested-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Aniruddha Tvs Rao <anrao@nvidia.com>
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20210407094617.770495-1-jonathanh@nvidia.com
Cc: stable@vger.kernel.org # v5.10+
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/sdhci-tegra.c')
| -rw-r--r-- | drivers/mmc/host/sdhci-tegra.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c index c61f797a853f..387ce9cdbd7c 100644 --- a/drivers/mmc/host/sdhci-tegra.c +++ b/drivers/mmc/host/sdhci-tegra.c @@ -119,6 +119,10 @@ /* SDMMC CQE Base Address for Tegra Host Ver 4.1 and Higher */ #define SDHCI_TEGRA_CQE_BASE_ADDR 0xF000 +#define SDHCI_TEGRA_CQE_TRNS_MODE (SDHCI_TRNS_MULTI | \ + SDHCI_TRNS_BLK_CNT_EN | \ + SDHCI_TRNS_DMA) + struct sdhci_tegra_soc_data { const struct sdhci_pltfm_data *pdata; u64 dma_mask; @@ -1156,6 +1160,7 @@ static void tegra_sdhci_voltage_switch(struct sdhci_host *host) static void tegra_cqhci_writel(struct cqhci_host *cq_host, u32 val, int reg) { struct mmc_host *mmc = cq_host->mmc; + struct sdhci_host *host = mmc_priv(mmc); u8 ctrl; ktime_t timeout; bool timed_out; @@ -1170,6 +1175,7 @@ static void tegra_cqhci_writel(struct cqhci_host *cq_host, u32 val, int reg) */ if (reg == CQHCI_CTL && !(val & CQHCI_HALT) && cqhci_readl(cq_host, CQHCI_CTL) & CQHCI_HALT) { + sdhci_writew(host, SDHCI_TEGRA_CQE_TRNS_MODE, SDHCI_TRANSFER_MODE); sdhci_cqe_enable(mmc); writel(val, cq_host->mmio + reg); timeout = ktime_add_us(ktime_get(), 50); @@ -1205,6 +1211,7 @@ static void sdhci_tegra_update_dcmd_desc(struct mmc_host *mmc, static void sdhci_tegra_cqe_enable(struct mmc_host *mmc) { struct cqhci_host *cq_host = mmc->cqe_private; + struct sdhci_host *host = mmc_priv(mmc); u32 val; /* @@ -1218,6 +1225,7 @@ static void sdhci_tegra_cqe_enable(struct mmc_host *mmc) if (val & CQHCI_ENABLE) cqhci_writel(cq_host, (val & ~CQHCI_ENABLE), CQHCI_CFG); + sdhci_writew(host, SDHCI_TEGRA_CQE_TRNS_MODE, SDHCI_TRANSFER_MODE); sdhci_cqe_enable(mmc); if (val & CQHCI_ENABLE) cqhci_writel(cq_host, val, CQHCI_CFG); @@ -1281,12 +1289,36 @@ static void tegra_sdhci_set_timeout(struct sdhci_host *host, __sdhci_set_timeout(host, cmd); } +static void sdhci_tegra_cqe_pre_enable(struct mmc_host *mmc) +{ + struct cqhci_host *cq_host = mmc->cqe_private; + u32 reg; + + reg = cqhci_readl(cq_host, CQHCI_CFG); + reg |= CQHCI_ENABLE; + cqhci_writel(cq_host, reg, CQHCI_CFG); +} + +static void sdhci_tegra_cqe_post_disable(struct mmc_host *mmc) +{ + struct cqhci_host *cq_host = mmc->cqe_private; + struct sdhci_host *host = mmc_priv(mmc); + u32 reg; + + reg = cqhci_readl(cq_host, CQHCI_CFG); + reg &= ~CQHCI_ENABLE; + cqhci_writel(cq_host, reg, CQHCI_CFG); + sdhci_writew(host, 0x0, SDHCI_TRANSFER_MODE); +} + static const struct cqhci_host_ops sdhci_tegra_cqhci_ops = { .write_l = tegra_cqhci_writel, .enable = sdhci_tegra_cqe_enable, .disable = sdhci_cqe_disable, .dumpregs = sdhci_tegra_dumpregs, .update_dcmd_desc = sdhci_tegra_update_dcmd_desc, + .pre_enable = sdhci_tegra_cqe_pre_enable, + .post_disable = sdhci_tegra_cqe_post_disable, }; static int tegra_sdhci_set_dma_mask(struct sdhci_host *host) |