diff options
| author | Masaharu Hayakawa <masaharu.hayakawa.ry@renesas.com> | 2018-06-18 14:57:50 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2018-07-16 11:21:45 +0200 |
| commit | db924bba47c8031188545c84bf943f4058b659d0 (patch) | |
| tree | 57563743707e1b0bac3a1e84ab6020c87078204f /drivers/mmc | |
| parent | ba6c7ac3a2f421635ae4446269526359d8bff721 (diff) | |
| download | linux-db924bba47c8031188545c84bf943f4058b659d0.tar.bz2 | |
mmc: tmio: add eMMC HS400 mode support
This patch adds processing for selecting HS400 mode.
Signed-off-by: Masaharu Hayakawa <masaharu.hayakawa.ry@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/tmio_mmc.h | 6 | ||||
| -rw-r--r-- | drivers/mmc/host/tmio_mmc_core.c | 47 |
2 files changed, 51 insertions, 2 deletions
diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h index e7d651352dc9..5d141f79e175 100644 --- a/drivers/mmc/host/tmio_mmc.h +++ b/drivers/mmc/host/tmio_mmc.h @@ -46,6 +46,7 @@ #define CTL_DMA_ENABLE 0xd8 #define CTL_RESET_SD 0xe0 #define CTL_VERSION 0xe2 +#define CTL_SDIF_MODE 0xe6 #define CTL_SDIO_REGS 0x100 #define CTL_CLK_AND_WAIT_CTL 0x138 #define CTL_RESET_SDIO 0x1e0 @@ -191,6 +192,11 @@ struct tmio_mmc_host { /* Tuning values: 1 for success, 0 for failure */ DECLARE_BITMAP(taps, BITS_PER_BYTE * sizeof(long)); unsigned int tap_num; + unsigned long tap_set; + + void (*prepare_hs400_tuning)(struct tmio_mmc_host *host); + void (*hs400_downgrade)(struct tmio_mmc_host *host); + void (*hs400_complete)(struct tmio_mmc_host *host); const struct tmio_mmc_dma_ops *dma_ops; }; diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c index 308029930304..416f9e078fda 100644 --- a/drivers/mmc/host/tmio_mmc_core.c +++ b/drivers/mmc/host/tmio_mmc_core.c @@ -199,6 +199,14 @@ static void tmio_mmc_set_clock(struct tmio_mmc_host *host, tmio_mmc_clk_stop(host); return; } + /* + * Both HS400 and HS200/SD104 set 200MHz, but some devices need to + * set 400MHz to distinguish the CPG settings in HS400. + */ + if (host->mmc->ios.timing == MMC_TIMING_MMC_HS400 && + host->pdata->flags & TMIO_MMC_HAVE_4TAP_HS400 && + new_clock == 200000000) + new_clock = 400000000; if (host->clk_update) clock = host->clk_update(host, new_clock) / 512; @@ -209,8 +217,13 @@ static void tmio_mmc_set_clock(struct tmio_mmc_host *host, clock <<= 1; /* 1/1 clock is option */ - if ((host->pdata->flags & TMIO_MMC_CLK_ACTUAL) && ((clk >> 22) & 0x1)) - clk |= 0xff; + if ((host->pdata->flags & TMIO_MMC_CLK_ACTUAL) && + ((clk >> 22) & 0x1)) { + if (!(host->mmc->ios.timing == MMC_TIMING_MMC_HS400)) + clk |= 0xff; + else + clk &= ~0xff; + } if (host->set_clk_div) host->set_clk_div(host->pdev, (clk >> 22) & 1); @@ -1087,6 +1100,33 @@ static int tmio_multi_io_quirk(struct mmc_card *card, return blk_size; } +static int tmio_mmc_prepare_hs400_tuning(struct mmc_host *mmc, + struct mmc_ios *ios) +{ + struct tmio_mmc_host *host = mmc_priv(mmc); + + if (host->prepare_hs400_tuning) + host->prepare_hs400_tuning(host); + + return 0; +} + +static void tmio_mmc_hs400_downgrade(struct mmc_host *mmc) +{ + struct tmio_mmc_host *host = mmc_priv(mmc); + + if (host->hs400_downgrade) + host->hs400_downgrade(host); +} + +static void tmio_mmc_hs400_complete(struct mmc_host *mmc) +{ + struct tmio_mmc_host *host = mmc_priv(mmc); + + if (host->hs400_complete) + host->hs400_complete(host); +} + static const struct mmc_host_ops tmio_mmc_ops = { .request = tmio_mmc_request, .set_ios = tmio_mmc_set_ios, @@ -1096,6 +1136,9 @@ static const struct mmc_host_ops tmio_mmc_ops = { .multi_io_quirk = tmio_multi_io_quirk, .hw_reset = tmio_mmc_hw_reset, .execute_tuning = tmio_mmc_execute_tuning, + .prepare_hs400_tuning = tmio_mmc_prepare_hs400_tuning, + .hs400_downgrade = tmio_mmc_hs400_downgrade, + .hs400_complete = tmio_mmc_hs400_complete, }; static int tmio_mmc_init_ocr(struct tmio_mmc_host *host) |