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mmc: sdhi: Add r8a7795 support

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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>
This commit is contained in:
Wolfram Sang 2016-02-15 16:01:48 +01:00 committed by Ulf Hansson
parent fce1442164
commit a72e8b1700
3 changed files with 36 additions and 14 deletions
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1
Documentation/devicetree/bindings/mmc/tmio_mmc.txt
View File

@ -22,6 +22,7 @@ Required properties:
"renesas,sdhi-r8a7792" - SDHI IP on R8A7792 SoC
"renesas,sdhi-r8a7793" - SDHI IP on R8A7793 SoC
"renesas,sdhi-r8a7794" - SDHI IP on R8A7794 SoC
"renesas,sdhi-r8a7795" - SDHI IP on R8A7795 SoC
Optional properties:
- toshiba,mmc-wrprotect-disable: write-protect detection is unavailable

2
drivers/mmc/host/Kconfig
View File

@ -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

47
drivers/mmc/host/sh_mobile_sdhi.c
View File

@ -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;