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Release 4.11 drivers/mmc/host/sh_mobile_sdhi.c

Directory: drivers/mmc/host
/*
 * 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
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Based on "Compaq ASIC3 support":
 *
 * Copyright 2001 Compaq Computer Corporation.
 * Copyright 2004-2005 Phil Blundell
 * Copyright 2007-2008 OpenedHand Ltd.
 *
 * Authors: Phil Blundell <pb@handhelds.org>,
 *          Samuel Ortiz <sameo@openedhand.com>
 *
 */

#include <linux/kernel.h>
#include <linux/clk.h>
#include <linux/slab.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/mmc/host.h>
#include <linux/mfd/tmio.h>
#include <linux/sh_dma.h>
#include <linux/delay.h>
#include <linux/pinctrl/consumer.h>
#include <linux/pinctrl/pinctrl-state.h>
#include <linux/regulator/consumer.h>

#include "tmio_mmc.h"


#define EXT_ACC           0xe4


#define SDHI_VER_GEN2_SDR50	0x490c
/* very old datasheets said 0x490c for SDR104, too. They are wrong! */

#define SDHI_VER_GEN2_SDR104	0xcb0d

#define SDHI_VER_GEN3_SD	0xcc10

#define SDHI_VER_GEN3_SDMMC	0xcd10


#define host_to_priv(host) container_of((host)->pdata, struct sh_mobile_sdhi, mmc_data)


struct sh_mobile_sdhi_scc {
	
unsigned long clk_rate;	/* clock rate for SDR104 */
	
u32 tap;		/* sampling clock position for SDR104 */
};


struct sh_mobile_sdhi_of_data {
	
unsigned long tmio_flags;
	
u32	      tmio_ocr_mask;
	
unsigned long capabilities;
	
unsigned long capabilities2;
	
enum dma_slave_buswidth dma_buswidth;
	
dma_addr_t dma_rx_offset;
	
unsigned bus_shift;
	
int scc_offset;
	
struct sh_mobile_sdhi_scc *taps;
	
int taps_num;
};


static const struct sh_mobile_sdhi_of_data of_default_cfg = {
	.tmio_flags = TMIO_MMC_HAS_IDLE_WAIT,
};


static const struct sh_mobile_sdhi_of_data of_rz_compatible = {
	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_32BIT_DATA_PORT,
	.tmio_ocr_mask	= MMC_VDD_32_33,
	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
};


static const struct sh_mobile_sdhi_of_data of_rcar_gen1_compatible = {
	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
			  TMIO_MMC_CLK_ACTUAL,
	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
};

/* Definitions for sampling clocks */

static struct sh_mobile_sdhi_scc rcar_gen2_scc_taps[] = {
	{
		.clk_rate = 156000000,
		.tap = 0x00000703,
        },
	{
		.clk_rate = 0,
		.tap = 0x00000300,
        },
};


static const struct sh_mobile_sdhi_of_data of_rcar_gen2_compatible = {
	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
			  TMIO_MMC_CLK_ACTUAL | TMIO_MMC_MIN_RCAR2,
	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
	.dma_buswidth	= DMA_SLAVE_BUSWIDTH_4_BYTES,
	.dma_rx_offset	= 0x2000,
	.scc_offset	= 0x0300,
	.taps		= rcar_gen2_scc_taps,
	.taps_num	= ARRAY_SIZE(rcar_gen2_scc_taps),
};

/* Definitions for sampling clocks */

static struct sh_mobile_sdhi_scc rcar_gen3_scc_taps[] = {
	{
		.clk_rate = 0,
		.tap = 0x00000300,
        },
};


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_MIN_RCAR2,
	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
	.bus_shift	= 2,
	.scc_offset	= 0x1000,
	.taps		= rcar_gen3_scc_taps,
	.taps_num	= ARRAY_SIZE(rcar_gen3_scc_taps),
};


static const struct of_device_id sh_mobile_sdhi_of_match[] = {
	{ .compatible = "renesas,sdhi-shmobile" },
	{ .compatible = "renesas,sdhi-sh73a0", .data = &of_default_cfg, },
	{ .compatible = "renesas,sdhi-r8a73a4", .data = &of_default_cfg, },
	{ .compatible = "renesas,sdhi-r8a7740", .data = &of_default_cfg, },
	{ .compatible = "renesas,sdhi-r7s72100", .data = &of_rz_compatible, },
	{ .compatible = "renesas,sdhi-r8a7778", .data = &of_rcar_gen1_compatible, },
	{ .compatible = "renesas,sdhi-r8a7779", .data = &of_rcar_gen1_compatible, },
	{ .compatible = "renesas,sdhi-r8a7790", .data = &of_rcar_gen2_compatible, },
	{ .compatible = "renesas,sdhi-r8a7791", .data = &of_rcar_gen2_compatible, },
	{ .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, },
	{ .compatible = "renesas,sdhi-r8a7796", .data = &of_rcar_gen3_compatible, },
	{},
};
MODULE_DEVICE_TABLE(of, sh_mobile_sdhi_of_match);


struct sh_mobile_sdhi {
	
struct clk *clk;
	
struct clk *clk_cd;
	
struct tmio_mmc_data mmc_data;
	
struct tmio_mmc_dma dma_priv;
	
struct pinctrl *pinctrl;
	

struct pinctrl_state *pins_default, *pins_uhs;
	
void __iomem *scc_ctl;
};


static void sh_mobile_sdhi_sdbuf_width(struct tmio_mmc_host *host, int width) { u32 val; /* * see also * sh_mobile_sdhi_of_data :: dma_buswidth */ switch (sd_ctrl_read16(host, CTL_VERSION)) { case SDHI_VER_GEN2_SDR50: val = (width == 32) ? 0x0001 : 0x0000; break; case SDHI_VER_GEN2_SDR104: val = (width == 32) ? 0x0000 : 0x0001; break; case SDHI_VER_GEN3_SD: case SDHI_VER_GEN3_SDMMC: if (width == 64) val = 0x0000; else if (width == 32) val = 0x0101; else val = 0x0001; break; default: /* nothing to do */ return; } sd_ctrl_write16(host, EXT_ACC, val); }

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static int sh_mobile_sdhi_clk_enable(struct tmio_mmc_host *host) { struct mmc_host *mmc = host->mmc; struct sh_mobile_sdhi *priv = host_to_priv(host); int ret = clk_prepare_enable(priv->clk); if (ret < 0) return ret; ret = clk_prepare_enable(priv->clk_cd); if (ret < 0) { clk_disable_unprepare(priv->clk); return ret; } /* * The clock driver may not know what maximum frequency * actually works, so it should be set with the max-frequency * property which will already have been read to f_max. If it * was missing, assume the current frequency is the maximum. */ if (!mmc->f_max) mmc->f_max = clk_get_rate(priv->clk); /* * Minimum frequency is the minimum input clock frequency * divided by our maximum divider. */ mmc->f_min = max(clk_round_rate(priv->clk, 1) / 512, 1L); /* enable 16bit data access on SDBUF as default */ sh_mobile_sdhi_sdbuf_width(host, 16); return 0; }

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static unsigned int sh_mobile_sdhi_clk_update(struct tmio_mmc_host *host, unsigned int new_clock) { struct sh_mobile_sdhi *priv = host_to_priv(host); unsigned int freq, diff, best_freq = 0, diff_min = ~0; int i, ret; /* tested only on RCar Gen2+ currently; may work for others */ if (!(host->pdata->flags & TMIO_MMC_MIN_RCAR2)) return clk_get_rate(priv->clk); /* * We want the bus clock to be as close as possible to, but no * greater than, new_clock. As we can divide by 1 << i for * any i in [0, 9] we want the input clock to be as close as * possible, but no greater than, new_clock << i. */ for (i = min(9, ilog2(UINT_MAX / new_clock)); i >= 0; i--) { freq = clk_round_rate(priv->clk, new_clock << i); if (freq > (new_clock << i)) { /* Too fast; look for a slightly slower option */ freq = clk_round_rate(priv->clk, (new_clock << i) / 4 * 3); if (freq > (new_clock << i)) continue; } diff = new_clock - (freq >> i); if (diff <= diff_min) { best_freq = freq; diff_min = diff; } } ret = clk_set_rate(priv->clk, best_freq); return ret == 0 ? best_freq : clk_get_rate(priv->clk); }

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static void sh_mobile_sdhi_clk_disable(struct tmio_mmc_host *host) { struct sh_mobile_sdhi *priv = host_to_priv(host); clk_disable_unprepare(priv->clk); clk_disable_unprepare(priv->clk_cd); }

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static int sh_mobile_sdhi_card_busy(struct mmc_host *mmc) { struct tmio_mmc_host *host = mmc_priv(mmc); return !(sd_ctrl_read16_and_16_as_32(host, CTL_STATUS) & TMIO_STAT_DAT0); }

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static int sh_mobile_sdhi_start_signal_voltage_switch(struct mmc_host *mmc, struct mmc_ios *ios) { struct tmio_mmc_host *host = mmc_priv(mmc); struct sh_mobile_sdhi *priv = host_to_priv(host); struct pinctrl_state *pin_state; int ret; switch (ios->signal_voltage) { case MMC_SIGNAL_VOLTAGE_330: pin_state = priv->pins_default; break; case MMC_SIGNAL_VOLTAGE_180: pin_state = priv->pins_uhs; break; default: return -EINVAL; } /* * If anything is missing, assume signal voltage is fixed at * 3.3V and succeed/fail accordingly. */ if (IS_ERR(priv->pinctrl) || IS_ERR(pin_state)) return ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330 ? 0 : -EINVAL; ret = mmc_regulator_set_vqmmc(host->mmc, ios); if (ret) return ret; return pinctrl_select_state(priv->pinctrl, pin_state); }

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/* SCC registers */ #define SH_MOBILE_SDHI_SCC_DTCNTL 0x000 #define SH_MOBILE_SDHI_SCC_TAPSET 0x002 #define SH_MOBILE_SDHI_SCC_DT2FF 0x004 #define SH_MOBILE_SDHI_SCC_CKSEL 0x006 #define SH_MOBILE_SDHI_SCC_RVSCNTL 0x008 #define SH_MOBILE_SDHI_SCC_RVSREQ 0x00A /* Definitions for values the SH_MOBILE_SDHI_SCC_DTCNTL register */ #define SH_MOBILE_SDHI_SCC_DTCNTL_TAPEN BIT(0) #define SH_MOBILE_SDHI_SCC_DTCNTL_TAPNUM_SHIFT 16 #define SH_MOBILE_SDHI_SCC_DTCNTL_TAPNUM_MASK 0xff /* Definitions for values the SH_MOBILE_SDHI_SCC_CKSEL register */ #define SH_MOBILE_SDHI_SCC_CKSEL_DTSEL BIT(0) /* Definitions for values the SH_MOBILE_SDHI_SCC_RVSCNTL register */ #define SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN BIT(0) /* Definitions for values the SH_MOBILE_SDHI_SCC_RVSREQ register */ #define SH_MOBILE_SDHI_SCC_RVSREQ_RVSERR BIT(2)
static inline u32 sd_scc_read32(struct tmio_mmc_host *host, struct sh_mobile_sdhi *priv, int addr) { return readl(priv->scc_ctl + (addr << host->bus_shift)); }

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static inline void sd_scc_write32(struct tmio_mmc_host *host, struct sh_mobile_sdhi *priv, int addr, u32 val) { writel(val, priv->scc_ctl + (addr << host->bus_shift)); }

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static unsigned int sh_mobile_sdhi_init_tuning(struct tmio_mmc_host *host) { struct sh_mobile_sdhi *priv; priv = host_to_priv(host); /* set sampling clock selection range */ sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_DTCNTL, 0x8 << SH_MOBILE_SDHI_SCC_DTCNTL_TAPNUM_SHIFT); /* Initialize SCC */ sd_ctrl_write32_as_16_and_16(host, CTL_STATUS, 0x0); sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_DTCNTL, SH_MOBILE_SDHI_SCC_DTCNTL_TAPEN | sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_DTCNTL)); sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN & sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_CKSEL, SH_MOBILE_SDHI_SCC_CKSEL_DTSEL | sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_CKSEL)); sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN | sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL, ~SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN & sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL)); sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_DT2FF, host->scc_tappos); /* Read TAPNUM */ return (sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_DTCNTL) >> SH_MOBILE_SDHI_SCC_DTCNTL_TAPNUM_SHIFT) & SH_MOBILE_SDHI_SCC_DTCNTL_TAPNUM_MASK; }

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static void sh_mobile_sdhi_prepare_tuning(struct tmio_mmc_host *host, unsigned long tap) { struct sh_mobile_sdhi *priv = host_to_priv(host); /* Set sampling clock position */ sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TAPSET, tap); }

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#define SH_MOBILE_SDHI_MAX_TAP 3
static int sh_mobile_sdhi_select_tuning(struct tmio_mmc_host *host) { struct sh_mobile_sdhi *priv = host_to_priv(host); unsigned long tap_cnt; /* counter of tuning success */ unsigned long tap_set; /* tap position */ unsigned long tap_start;/* start position of tuning success */ unsigned long tap_end; /* end position of tuning success */ unsigned long ntap; /* temporary counter of tuning success */ unsigned long i; /* Clear SCC_RVSREQ */ sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSREQ, 0); /* * Find the longest consecutive run of successful probes. If that * is more than SH_MOBILE_SDHI_MAX_TAP probes long then use the * center index as the tap. */ tap_cnt = 0; ntap = 0; tap_start = 0; tap_end = 0; for (i = 0; i < host->tap_num * 2; i++) { if (test_bit(i, host->taps)) ntap++; else { if (ntap > tap_cnt) { tap_start = i - ntap; tap_end = i - 1; tap_cnt = ntap; } ntap = 0; } } if (ntap > tap_cnt) { tap_start = i - ntap; tap_end = i - 1; tap_cnt = ntap; } if (tap_cnt >= SH_MOBILE_SDHI_MAX_TAP) tap_set = (tap_start + tap_end) / 2 % host->tap_num; else return -EIO; /* Set SCC */ sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TAPSET, tap_set); /* Enable auto re-tuning */ sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL, SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN | sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL)); return 0; }

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static bool sh_mobile_sdhi_check_scc_error(struct tmio_mmc_host *host) { struct sh_mobile_sdhi *priv = host_to_priv(host); /* Check SCC error */ if (sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL) & SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN && sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSREQ) & SH_MOBILE_SDHI_SCC_RVSREQ_RVSERR) { /* Clear SCC error */ sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSREQ, 0); return true; } return false; }

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static void sh_mobile_sdhi_hw_reset(struct tmio_mmc_host *host) { struct sh_mobile_sdhi *priv; priv = host_to_priv(host); /* Reset SCC */ sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN & sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_CKSEL, ~SH_MOBILE_SDHI_SCC_CKSEL_DTSEL & sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_CKSEL)); sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN | sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL, ~SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN & sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL)); sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL, ~SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN & sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL)); }

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static int sh_mobile_sdhi_wait_idle(struct tmio_mmc_host *host) { int timeout = 1000; while (--timeout && !(sd_ctrl_read16_and_16_as_32(host, CTL_STATUS) & TMIO_STAT_SCLKDIVEN)) udelay(1); if (!timeout) { dev_warn(&host->pdev->dev, "timeout waiting for SD bus idle\n"); return -EBUSY; } return 0; }

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static int sh_mobile_sdhi_write16_hook(struct tmio_mmc_host *host, int addr) { switch (addr) { case CTL_SD_CMD: case CTL_STOP_INTERNAL_ACTION: case CTL_XFER_BLK_COUNT: case CTL_SD_CARD_CLK_CTL: case CTL_SD_XFER_LEN: case CTL_SD_MEM_CARD_OPT: case CTL_TRANSACTION_CTL: case CTL_DMA_ENABLE: case EXT_ACC: return sh_mobile_sdhi_wait_idle(host); } return 0; }

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static int sh_mobile_sdhi_multi_io_quirk(struct mmc_card *card, unsigned int direction, int blk_size) { /* * In Renesas controllers, when performing a * multiple block read of one or two blocks, * depending on the timing with which the * response register is read, the response * value may not be read properly. * Use single block read for this HW bug */ if ((direction == MMC_DATA_READ) && blk_size == 2) return 1; return blk_size; }

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static void sh_mobile_sdhi_enable_dma(struct tmio_mmc_host *host, bool enable) { sd_ctrl_write16(host, CTL_DMA_ENABLE, enable ? 2 : 0); /* enable 32bit access if DMA mode if possibile */ sh_mobile_sdhi_sdbuf_width(host, enable ? 32 : 16); }

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Kuninori Morimoto39100.00%2100.00%
Total39100.00%2100.00%


static int sh_mobile_sdhi_probe(struct platform_device *pdev) { const struct sh_mobile_sdhi_of_data *of_data = of_device_get_match_data(&pdev->dev); struct sh_mobile_sdhi *priv; struct tmio_mmc_data *mmc_data; struct tmio_mmc_data *mmd = pdev->dev.platform_data; struct tmio_mmc_host *host; struct resource *res; int irq, ret, i; struct tmio_mmc_dma *dma_priv; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) return -EINVAL; priv = devm_kzalloc(&pdev->dev, sizeof(struct sh_mobile_sdhi), GFP_KERNEL); if (!priv) return -ENOMEM; mmc_data = &priv->mmc_data; dma_priv = &priv->dma_priv; priv->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(priv->clk)) { ret = PTR_ERR(priv->clk); dev_err(&pdev->dev, "cannot get clock: %d\n", ret); goto eprobe; } /* * Some controllers provide a 2nd clock just to run the internal card * detection logic. Unfortunately, the existing driver architecture does * not support a separation of clocks for runtime PM usage. When * native hotplug is used, the tmio driver assumes that the core * must continue to run for card detect to stay active, so we cannot * disable it. * Additionally, it is prohibited to supply a clock to the core but not * to the card detect circuit. That leaves us with if separate clocks * are presented, we must treat them both as virtually 1 clock. */ priv->clk_cd = devm_clk_get(&pdev->dev, "cd"); if (IS_ERR(priv->clk_cd)) priv->clk_cd = NULL; priv->pinctrl = devm_pinctrl_get(&pdev->dev); if (!IS_ERR(priv->pinctrl)) { priv->pins_default = pinctrl_lookup_state(priv->pinctrl, PINCTRL_STATE_DEFAULT); priv->pins_uhs = pinctrl_lookup_state(priv->pinctrl, "state_uhs"); } host = tmio_mmc_host_alloc(pdev); if (!host) { ret = -ENOMEM; goto eprobe; } if (of_data) { mmc_data->flags |= of_data->tmio_flags; mmc_data->ocr_mask = of_data->tmio_ocr_mask; 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_update = sh_mobile_sdhi_clk_update; host->clk_disable = sh_mobile_sdhi_clk_disable; host->multi_io_quirk = sh_mobile_sdhi_multi_io_quirk; /* SDR speeds are only available on Gen2+ */ if (mmc_data->flags & TMIO_MMC_MIN_RCAR2) { /* card_busy caused issues on r8a73a4 (pre-Gen2) CD-less SDHI */ host->card_busy = sh_mobile_sdhi_card_busy; host->start_signal_voltage_switch = sh_mobile_sdhi_start_signal_voltage_switch; } /* 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; if (mmd) *mmc_data = *mmd; dma_priv->filter = shdma_chan_filter; dma_priv->enable = sh_mobile_sdhi_enable_dma; mmc_data->alignment_shift = 1; /* 2-byte alignment */ mmc_data->capabilities |= MMC_CAP_MMC_HIGHSPEED; /* * All SDHI blocks support 2-byte and larger block sizes in 4-bit * bus width mode. */ mmc_data->flags |= TMIO_MMC_BLKSZ_2BYTES; /* * All SDHI blocks support SDIO IRQ signalling. */ mmc_data->flags |= TMIO_MMC_SDIO_IRQ; /* * All SDHI have CMD12 controll bit */ mmc_data->flags |= TMIO_MMC_HAVE_CMD12_CTRL; /* All SDHI have SDIO status bits which must be 1 */ mmc_data->flags |= TMIO_MMC_SDIO_STATUS_SETBITS; ret = tmio_mmc_host_probe(host, mmc_data); if (ret < 0) goto efree; /* Enable tuning iff we have an SCC and a supported mode */ if (of_data && of_data->scc_offset && (host->mmc->caps & MMC_CAP_UHS_SDR104 || host->mmc->caps2 & MMC_CAP2_HS200_1_8V_SDR)) { const struct sh_mobile_sdhi_scc *taps = of_data->taps; bool hit = false; host->mmc->caps |= MMC_CAP_HW_RESET; for (i = 0; i < of_data->taps_num; i++) { if (taps[i].clk_rate == 0 || taps[i].clk_rate == host->mmc->f_max) { host->scc_tappos = taps->tap; hit = true; break; } } if (!hit) dev_warn(&host->pdev->dev, "Unknown clock rate for SDR104\n"); priv->scc_ctl = host->ctl + of_data->scc_offset; host->init_tuning = sh_mobile_sdhi_init_tuning; host->prepare_tuning = sh_mobile_sdhi_prepare_tuning; host->select_tuning = sh_mobile_sdhi_select_tuning; host->check_scc_error = sh_mobile_sdhi_check_scc_error; host->hw_reset = sh_mobile_sdhi_hw_reset; } i = 0; while (1) { irq = platform_get_irq(pdev, i); if (irq < 0) break; i++; ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_irq, 0, dev_name(&pdev->dev), host); if (ret) goto eirq; } /* There must be at least one IRQ source */ if (!i) { ret = irq; goto eirq; } dev_info(&pdev->dev, "%s base at 0x%08lx max clock rate %u MHz\n", mmc_hostname(host->mmc), (unsigned long) (platform_get_resource(pdev, IORESOURCE_MEM, 0)->start), host->mmc->f_max / 1000000); return ret; eirq: tmio_mmc_host_remove(host); efree: tmio_mmc_host_free(host); eprobe: return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Wolfram Sang20024.60%1020.00%
Magnus Damm15719.31%612.00%
Simon Horman14718.08%24.00%
Kuninori Morimoto12415.25%1326.00%
Guennadi Liakhovetski12014.76%1224.00%
Chris Brandt384.67%24.00%
Shinobu Uehara121.48%24.00%
Ben Hutchings70.86%12.00%
Wei Yongjun50.62%12.00%
Arnd Hannemann30.37%12.00%
Total813100.00%50100.00%


static int sh_mobile_sdhi_remove(struct platform_device *pdev) { struct mmc_host *mmc = platform_get_drvdata(pdev); struct tmio_mmc_host *host = mmc_priv(mmc); tmio_mmc_host_remove(host); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Magnus Damm2358.97%133.33%
Guennadi Liakhovetski1641.03%266.67%
Total39100.00%3100.00%

static const struct dev_pm_ops tmio_mmc_dev_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume) SET_RUNTIME_PM_OPS(tmio_mmc_host_runtime_suspend, tmio_mmc_host_runtime_resume, NULL) }; static struct platform_driver sh_mobile_sdhi_driver = { .driver = { .name = "sh_mobile_sdhi", .pm = &tmio_mmc_dev_pm_ops, .of_match_table = sh_mobile_sdhi_of_match, }, .probe = sh_mobile_sdhi_probe, .remove = sh_mobile_sdhi_remove, }; module_platform_driver(sh_mobile_sdhi_driver); MODULE_DESCRIPTION("SuperH Mobile SDHI driver"); MODULE_AUTHOR("Magnus Damm"); MODULE_LICENSE("GPL v2"); MODULE_ALIAS("platform:sh_mobile_sdhi");

Overall Contributors

PersonTokensPropCommitsCommitProp
Simon Horman114136.69%33.45%
Wolfram Sang54017.36%2022.99%
Kuninori Morimoto47415.24%2326.44%
Guennadi Liakhovetski2728.75%1517.24%
Magnus Damm2588.30%66.90%
Ben Hutchings2016.46%22.30%
Chris Brandt1203.86%33.45%
Geert Uytterhoeven391.25%11.15%
Shinobu Uehara190.61%44.60%
Ulf Hansson140.45%22.30%
Ai Kyuse130.42%11.15%
Wei Yongjun50.16%11.15%
Tejun Heo30.10%11.15%
Paul Gortmaker30.10%11.15%
Arnd Hannemann30.10%11.15%
Laurent Pinchart20.06%11.15%
Axel Lin20.06%11.15%
Rafael J. Wysocki10.03%11.15%
Total3110100.00%87100.00%
Directory: drivers/mmc/host
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