diff options
author | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2016-02-15 15:01:48 (GMT) |
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committer | Ulf Hansson <ulf.hansson@linaro.org> | 2016-02-29 10:03:24 (GMT) |
commit | a72e8b170069e98e1f5ca2a2855ee399148a9152 (patch) | |
tree | 0c35865683fd25dbf833ceb74b6dbbabeff43a37 /drivers/mmc | |
parent | fce1442164cff51250c8f264b3757fd76f2a955b (diff) | |
download | linux-a72e8b170069e98e1f5ca2a2855ee399148a9152.tar.xz |
mmc: sdhi: Add r8a7795 support
Registers are 64bit apart, so we refactor bus_shift handling a little and set
it based on the DT compatible. Also, EXT_ACC is different. It has been tested
on a Salvator-X (Gen3) and, to check for regressions, on a Lager (Gen2).
Signed-off-by: Ai Kyuse <ai.kyuse.uw@renesas.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r-- | drivers/mmc/host/Kconfig | 2 | ||||
-rw-r--r-- | drivers/mmc/host/sh_mobile_sdhi.c | 47 |
2 files changed, 35 insertions, 14 deletions
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig index 4a35ebf..d9a9d92 100644 --- a/drivers/mmc/host/Kconfig +++ b/drivers/mmc/host/Kconfig @@ -560,7 +560,7 @@ config MMC_TMIO config MMC_SDHI tristate "SH-Mobile SDHI SD/SDIO controller support" - depends on SUPERH || ARM + depends on SUPERH || ARM || ARM64 depends on SUPERH || ARCH_SHMOBILE || COMPILE_TEST select MMC_TMIO_CORE help diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c index 557e2b9..9aa1479 100644 --- a/drivers/mmc/host/sh_mobile_sdhi.c +++ b/drivers/mmc/host/sh_mobile_sdhi.c @@ -1,6 +1,8 @@ /* * SuperH Mobile SDHI * + * Copyright (C) 2016 Sang Engineering, Wolfram Sang + * Copyright (C) 2015-16 Renesas Electronics Corporation * Copyright (C) 2009 Magnus Damm * * This program is free software; you can redistribute it and/or modify @@ -43,6 +45,7 @@ struct sh_mobile_sdhi_of_data { unsigned long capabilities2; enum dma_slave_buswidth dma_buswidth; dma_addr_t dma_rx_offset; + unsigned bus_shift; }; static const struct sh_mobile_sdhi_of_data sh_mobile_sdhi_of_cfg[] = { @@ -65,6 +68,13 @@ static const struct sh_mobile_sdhi_of_data of_rcar_gen2_compatible = { .dma_rx_offset = 0x2000, }; +static const struct sh_mobile_sdhi_of_data of_rcar_gen3_compatible = { + .tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE | + TMIO_MMC_CLK_ACTUAL | TMIO_MMC_FAST_CLK_CHG, + .capabilities = MMC_CAP_SD_HIGHSPEED, + .bus_shift = 2, +}; + static const struct of_device_id sh_mobile_sdhi_of_match[] = { { .compatible = "renesas,sdhi-shmobile" }, { .compatible = "renesas,sdhi-sh7372" }, @@ -78,6 +88,7 @@ static const struct of_device_id sh_mobile_sdhi_of_match[] = { { .compatible = "renesas,sdhi-r8a7792", .data = &of_rcar_gen2_compatible, }, { .compatible = "renesas,sdhi-r8a7793", .data = &of_rcar_gen2_compatible, }, { .compatible = "renesas,sdhi-r8a7794", .data = &of_rcar_gen2_compatible, }, + { .compatible = "renesas,sdhi-r8a7795", .data = &of_rcar_gen3_compatible, }, {}, }; MODULE_DEVICE_TABLE(of, sh_mobile_sdhi_of_match); @@ -103,6 +114,15 @@ static void sh_mobile_sdhi_sdbuf_width(struct tmio_mmc_host *host, int width) case 0xCB0D: val = (width == 32) ? 0x0000 : 0x0001; break; + case 0xCC10: /* Gen3, SD only */ + case 0xCD10: /* Gen3, SD + MMC */ + if (width == 64) + val = 0x0000; + else if (width == 32) + val = 0x0101; + else + val = 0x0001; + break; default: /* nothing to do */ return; @@ -233,16 +253,26 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev) goto eprobe; } + if (of_id && of_id->data) { + const struct sh_mobile_sdhi_of_data *of_data = of_id->data; + + mmc_data->flags |= of_data->tmio_flags; + mmc_data->capabilities |= of_data->capabilities; + mmc_data->capabilities2 |= of_data->capabilities2; + mmc_data->dma_rx_offset = of_data->dma_rx_offset; + dma_priv->dma_buswidth = of_data->dma_buswidth; + host->bus_shift = of_data->bus_shift; + } + host->dma = dma_priv; host->write16_hook = sh_mobile_sdhi_write16_hook; host->clk_enable = sh_mobile_sdhi_clk_enable; host->clk_disable = sh_mobile_sdhi_clk_disable; host->multi_io_quirk = sh_mobile_sdhi_multi_io_quirk; - /* SD control register space size is 0x100, 0x200 for bus_shift=1 */ - if (resource_size(res) > 0x100) + + /* Orginally registers were 16 bit apart, could be 32 or 64 nowadays */ + if (!host->bus_shift && resource_size(res) > 0x100) /* old way to determine the shift */ host->bus_shift = 1; - else - host->bus_shift = 0; if (mmd) *mmc_data = *mmd; @@ -274,15 +304,6 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev) */ mmc_data->flags |= TMIO_MMC_SDIO_STATUS_QUIRK; - if (of_id && of_id->data) { - const struct sh_mobile_sdhi_of_data *of_data = of_id->data; - mmc_data->flags |= of_data->tmio_flags; - mmc_data->capabilities |= of_data->capabilities; - mmc_data->capabilities2 |= of_data->capabilities2; - mmc_data->dma_rx_offset = of_data->dma_rx_offset; - dma_priv->dma_buswidth = of_data->dma_buswidth; - } - ret = tmio_mmc_host_probe(host, mmc_data); if (ret < 0) goto efree; |