diff options
| author | Weijun Yang <Weijun.Yang@csr.com> | 2015-04-27 11:15:14 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2015-06-01 10:06:49 +0300 |
| commit | a1b0b977d2b2b9248ae26df0c7987d1696028309 (patch) | |
| tree | 112e135d7e6dcaa3ba2ef124ad90a0f4e586b68b /drivers/mmc/host/sdhci-sirf.c | |
| parent | d1ba44a4232aa6a95c19b394df53b07b0d61c9c8 (diff) | |
| download | linux-a1b0b977d2b2b9248ae26df0c7987d1696028309.tar.xz | |
mmc: sdhci-sirf: fake version and capbility registers
chips have some issues for version and capbility registers, here we fake
them.
Signed-off-by: Weijun Yang <Weijun.Yang@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/sdhci-sirf.c')
| -rw-r--r-- | drivers/mmc/host/sdhci-sirf.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-sirf.c b/drivers/mmc/host/sdhci-sirf.c index 2201f76b539d..0110bae25b7e 100644 --- a/drivers/mmc/host/sdhci-sirf.c +++ b/drivers/mmc/host/sdhci-sirf.c @@ -43,6 +43,39 @@ static void sdhci_sirf_set_bus_width(struct sdhci_host *host, int width) sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); } +static u32 sdhci_sirf_readl_le(struct sdhci_host *host, int reg) +{ + u32 val = readl(host->ioaddr + reg); + + if (unlikely((reg == SDHCI_CAPABILITIES_1) && + (host->mmc->caps & MMC_CAP_UHS_SDR50))) { + /* fake CAP_1 register */ + val = SDHCI_SUPPORT_SDR50 | SDHCI_USE_SDR50_TUNING; + } + + if (unlikely(reg == SDHCI_SLOT_INT_STATUS)) { + u32 prss = val; + /* fake chips as V3.0 host conreoller */ + prss &= ~(0xFF << 16); + val = prss | (SDHCI_SPEC_300 << 16); + } + return val; +} + +static u16 sdhci_sirf_readw_le(struct sdhci_host *host, int reg) +{ + u16 ret = 0; + + ret = readw(host->ioaddr + reg); + + if (unlikely(reg == SDHCI_HOST_VERSION)) { + ret = readw(host->ioaddr + SDHCI_HOST_VERSION); + ret |= SDHCI_SPEC_300; + } + + return ret; +} + static int sdhci_sirf_execute_tuning(struct sdhci_host *host, u32 opcode) { int tuning_seq_cnt = 3; @@ -113,6 +146,8 @@ retry: } static struct sdhci_ops sdhci_sirf_ops = { + .read_l = sdhci_sirf_readl_le, + .read_w = sdhci_sirf_readw_le, .platform_execute_tuning = sdhci_sirf_execute_tuning, .set_clock = sdhci_set_clock, .get_max_clock = sdhci_pltfm_clk_get_max_clock, |