| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Ben Dooks | 891 | 28.20% | 1 | 1.43% |
| Thomas Abraham | 746 | 23.61% | 8 | 11.43% |
| Tomasz Figa | 303 | 9.59% | 8 | 11.43% |
| Jaehoon Chung | 297 | 9.40% | 8 | 11.43% |
| Marek Szyprowski | 188 | 5.95% | 5 | 7.14% |
| Jeongbae Seo | 179 | 5.66% | 2 | 2.86% |
| Mark Brown | 163 | 5.16% | 4 | 5.71% |
| Chander Kashyap | 127 | 4.02% | 3 | 4.29% |
| Russell King | 62 | 1.96% | 5 | 7.14% |
| Adrian Hunter | 30 | 0.95% | 1 | 1.43% |
| Paul Osmialowski | 27 | 0.85% | 1 | 1.43% |
| Jingoo Han | 18 | 0.57% | 2 | 2.86% |
| Manuel Lauss | 16 | 0.51% | 1 | 1.43% |
| Seungwon Jeon | 16 | 0.51% | 1 | 1.43% |
| Sangwook Lee | 12 | 0.38% | 1 | 1.43% |
| Ulf Hansson | 11 | 0.35% | 2 | 2.86% |
| Rajeshwari Shinde | 11 | 0.35% | 1 | 1.43% |
| Thierry Reding | 10 | 0.32% | 1 | 1.43% |
| Julia Lawall | 9 | 0.28% | 1 | 1.43% |
| Bartlomiej Zolnierkiewicz | 8 | 0.25% | 1 | 1.43% |
| Kyungmin Park | 7 | 0.22% | 1 | 1.43% |
| Hyuk Lee | 7 | 0.22% | 1 | 1.43% |
| Arnd Bergmann | 3 | 0.09% | 1 | 1.43% |
| Rafael J. Wysocki | 3 | 0.09% | 1 | 1.43% |
| Tejun Heo | 3 | 0.09% | 1 | 1.43% |
| Tushar Behera | 2 | 0.06% | 1 | 1.43% |
| Baolin Wang | 2 | 0.06% | 1 | 1.43% |
| Axel Lin | 2 | 0.06% | 1 | 1.43% |
| Wonil Choi | 2 | 0.06% | 1 | 1.43% |
| Thomas Gleixner | 2 | 0.06% | 1 | 1.43% |
| Krzysztof Kozlowski | 1 | 0.03% | 1 | 1.43% |
| Gustavo A. R. Silva | 1 | 0.03% | 1 | 1.43% |
| Michał Mirosław | 1 | 0.03% | 1 | 1.43% |
| Total | 3160 | 70 |
// SPDX-License-Identifier: GPL-2.0-only /* linux/drivers/mmc/host/sdhci-s3c.c * * Copyright 2008 Openmoko Inc. * Copyright 2008 Simtec Electronics * Ben Dooks <ben@simtec.co.uk> * http://armlinux.simtec.co.uk/ * * SDHCI (HSMMC) support for Samsung SoC */ #include <linux/spinlock.h> #include <linux/delay.h> #include <linux/dma-mapping.h> #include <linux/platform_device.h> #include <linux/platform_data/mmc-sdhci-s3c.h> #include <linux/slab.h> #include <linux/clk.h> #include <linux/io.h> #include <linux/gpio.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_gpio.h> #include <linux/pm.h> #include <linux/pm_runtime.h> #include <linux/mmc/host.h> #include "sdhci.h" #define MAX_BUS_CLK (4) #define S3C_SDHCI_CONTROL2 (0x80) #define S3C_SDHCI_CONTROL3 (0x84) #define S3C64XX_SDHCI_CONTROL4 (0x8C) #define S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR BIT(31) #define S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK BIT(30) #define S3C_SDHCI_CTRL2_CDINVRXD3 BIT(29) #define S3C_SDHCI_CTRL2_SLCARDOUT BIT(28) #define S3C_SDHCI_CTRL2_FLTCLKSEL_MASK (0xf << 24) #define S3C_SDHCI_CTRL2_FLTCLKSEL_SHIFT (24) #define S3C_SDHCI_CTRL2_FLTCLKSEL(_x) ((_x) << 24) #define S3C_SDHCI_CTRL2_LVLDAT_MASK (0xff << 16) #define S3C_SDHCI_CTRL2_LVLDAT_SHIFT (16) #define S3C_SDHCI_CTRL2_LVLDAT(_x) ((_x) << 16) #define S3C_SDHCI_CTRL2_ENFBCLKTX BIT(15) #define S3C_SDHCI_CTRL2_ENFBCLKRX BIT(14) #define S3C_SDHCI_CTRL2_SDCDSEL BIT(13) #define S3C_SDHCI_CTRL2_SDSIGPC BIT(12) #define S3C_SDHCI_CTRL2_ENBUSYCHKTXSTART BIT(11) #define S3C_SDHCI_CTRL2_DFCNT_MASK (0x3 << 9) #define S3C_SDHCI_CTRL2_DFCNT_SHIFT (9) #define S3C_SDHCI_CTRL2_DFCNT_NONE (0x0 << 9) #define S3C_SDHCI_CTRL2_DFCNT_4SDCLK (0x1 << 9) #define S3C_SDHCI_CTRL2_DFCNT_16SDCLK (0x2 << 9) #define S3C_SDHCI_CTRL2_DFCNT_64SDCLK (0x3 << 9) #define S3C_SDHCI_CTRL2_ENCLKOUTHOLD BIT(8) #define S3C_SDHCI_CTRL2_RWAITMODE BIT(7) #define S3C_SDHCI_CTRL2_DISBUFRD BIT(6) #define S3C_SDHCI_CTRL2_SELBASECLK_MASK (0x3 << 4) #define S3C_SDHCI_CTRL2_SELBASECLK_SHIFT (4) #define S3C_SDHCI_CTRL2_PWRSYNC BIT(3) #define S3C_SDHCI_CTRL2_ENCLKOUTMSKCON BIT(1) #define S3C_SDHCI_CTRL2_HWINITFIN BIT(0) #define S3C_SDHCI_CTRL3_FCSEL3 BIT(31) #define S3C_SDHCI_CTRL3_FCSEL2 BIT(23) #define S3C_SDHCI_CTRL3_FCSEL1 BIT(15) #define S3C_SDHCI_CTRL3_FCSEL0 BIT(7) #define S3C_SDHCI_CTRL3_FIA3_MASK (0x7f << 24) #define S3C_SDHCI_CTRL3_FIA3_SHIFT (24) #define S3C_SDHCI_CTRL3_FIA3(_x) ((_x) << 24) #define S3C_SDHCI_CTRL3_FIA2_MASK (0x7f << 16) #define S3C_SDHCI_CTRL3_FIA2_SHIFT (16) #define S3C_SDHCI_CTRL3_FIA2(_x) ((_x) << 16) #define S3C_SDHCI_CTRL3_FIA1_MASK (0x7f << 8) #define S3C_SDHCI_CTRL3_FIA1_SHIFT (8) #define S3C_SDHCI_CTRL3_FIA1(_x) ((_x) << 8) #define S3C_SDHCI_CTRL3_FIA0_MASK (0x7f << 0) #define S3C_SDHCI_CTRL3_FIA0_SHIFT (0) #define S3C_SDHCI_CTRL3_FIA0(_x) ((_x) << 0) #define S3C64XX_SDHCI_CONTROL4_DRIVE_MASK (0x3 << 16) #define S3C64XX_SDHCI_CONTROL4_DRIVE_SHIFT (16) #define S3C64XX_SDHCI_CONTROL4_DRIVE_2mA (0x0 << 16) #define S3C64XX_SDHCI_CONTROL4_DRIVE_4mA (0x1 << 16) #define S3C64XX_SDHCI_CONTROL4_DRIVE_7mA (0x2 << 16) #define S3C64XX_SDHCI_CONTROL4_DRIVE_9mA (0x3 << 16) #define S3C64XX_SDHCI_CONTROL4_BUSY (1) /** * struct sdhci_s3c - S3C SDHCI instance * @host: The SDHCI host created * @pdev: The platform device we where created from. * @ioarea: The resource created when we claimed the IO area. * @pdata: The platform data for this controller. * @cur_clk: The index of the current bus clock. * @clk_io: The clock for the internal bus interface. * @clk_bus: The clocks that are available for the SD/MMC bus clock. */ struct sdhci_s3c { struct sdhci_host *host; struct platform_device *pdev; struct resource *ioarea; struct s3c_sdhci_platdata *pdata; int cur_clk; int ext_cd_irq; int ext_cd_gpio; struct clk *clk_io; struct clk *clk_bus[MAX_BUS_CLK]; unsigned long clk_rates[MAX_BUS_CLK]; bool no_divider; }; /** * struct sdhci_s3c_driver_data - S3C SDHCI platform specific driver data * @sdhci_quirks: sdhci host specific quirks. * * Specifies platform specific configuration of sdhci controller. * Note: A structure for driver specific platform data is used for future * expansion of its usage. */ struct sdhci_s3c_drv_data { unsigned int sdhci_quirks; bool no_divider; }; static inline struct sdhci_s3c *to_s3c(struct sdhci_host *host) { return sdhci_priv(host); } /** * sdhci_s3c_get_max_clk - callback to get maximum clock frequency. * @host: The SDHCI host instance. * * Callback to return the maximum clock rate acheivable by the controller. */ static unsigned int sdhci_s3c_get_max_clk(struct sdhci_host *host) { struct sdhci_s3c *ourhost = to_s3c(host); unsigned long rate, max = 0; int src; for (src = 0; src < MAX_BUS_CLK; src++) { rate = ourhost->clk_rates[src]; if (rate > max) max = rate; } return max; } /** * sdhci_s3c_consider_clock - consider one the bus clocks for current setting * @ourhost: Our SDHCI instance. * @src: The source clock index. * @wanted: The clock frequency wanted. */ static unsigned int sdhci_s3c_consider_clock(struct sdhci_s3c *ourhost, unsigned int src, unsigned int wanted) { unsigned long rate; struct clk *clksrc = ourhost->clk_bus[src]; int shift; if (IS_ERR(clksrc)) return UINT_MAX; /* * If controller uses a non-standard clock division, find the best clock * speed possible with selected clock source and skip the division. */ if (ourhost->no_divider) { rate = clk_round_rate(clksrc, wanted); return wanted - rate; } rate = ourhost->clk_rates[src]; for (shift = 0; shift <= 8; ++shift) { if ((rate >> shift) <= wanted) break; } if (shift > 8) { dev_dbg(&ourhost->pdev->dev, "clk %d: rate %ld, min rate %lu > wanted %u\n", src, rate, rate / 256, wanted); return UINT_MAX; } dev_dbg(&ourhost->pdev->dev, "clk %d: rate %ld, want %d, got %ld\n", src, rate, wanted, rate >> shift); return wanted - (rate >> shift); } /** * sdhci_s3c_set_clock - callback on clock change * @host: The SDHCI host being changed * @clock: The clock rate being requested. * * When the card's clock is going to be changed, look at the new frequency * and find the best clock source to go with it. */ static void sdhci_s3c_set_clock(struct sdhci_host *host, unsigned int clock) { struct sdhci_s3c *ourhost = to_s3c(host); unsigned int best = UINT_MAX; unsigned int delta; int best_src = 0; int src; u32 ctrl; host->mmc->actual_clock = 0; /* don't bother if the clock is going off. */ if (clock == 0) { sdhci_set_clock(host, clock); return; } for (src = 0; src < MAX_BUS_CLK; src++) { delta = sdhci_s3c_consider_clock(ourhost, src, clock); if (delta < best) { best = delta; best_src = src; } } dev_dbg(&ourhost->pdev->dev, "selected source %d, clock %d, delta %d\n", best_src, clock, best); /* select the new clock source */ if (ourhost->cur_clk != best_src) { struct clk *clk = ourhost->clk_bus[best_src]; clk_prepare_enable(clk); if (ourhost->cur_clk >= 0) clk_disable_unprepare( ourhost->clk_bus[ourhost->cur_clk]); ourhost->cur_clk = best_src; host->max_clk = ourhost->clk_rates[best_src]; } /* turn clock off to card before changing clock source */ writew(0, host->ioaddr + SDHCI_CLOCK_CONTROL); ctrl = readl(host->ioaddr + S3C_SDHCI_CONTROL2); ctrl &= ~S3C_SDHCI_CTRL2_SELBASECLK_MASK; ctrl |= best_src << S3C_SDHCI_CTRL2_SELBASECLK_SHIFT; writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL2); /* reprogram default hardware configuration */ writel(S3C64XX_SDHCI_CONTROL4_DRIVE_9mA, host->ioaddr + S3C64XX_SDHCI_CONTROL4); ctrl = readl(host->ioaddr + S3C_SDHCI_CONTROL2); ctrl |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR | S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK | S3C_SDHCI_CTRL2_ENFBCLKRX | S3C_SDHCI_CTRL2_DFCNT_NONE | S3C_SDHCI_CTRL2_ENCLKOUTHOLD); writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL2); /* reconfigure the controller for new clock rate */ ctrl = (S3C_SDHCI_CTRL3_FCSEL1 | S3C_SDHCI_CTRL3_FCSEL0); if (clock < 25 * 1000000) ctrl |= (S3C_SDHCI_CTRL3_FCSEL3 | S3C_SDHCI_CTRL3_FCSEL2); writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL3); sdhci_set_clock(host, clock); } /** * sdhci_s3c_get_min_clock - callback to get minimal supported clock value * @host: The SDHCI host being queried * * To init mmc host properly a minimal clock value is needed. For high system * bus clock's values the standard formula gives values out of allowed range. * The clock still can be set to lower values, if clock source other then * system bus is selected. */ static unsigned int sdhci_s3c_get_min_clock(struct sdhci_host *host) { struct sdhci_s3c *ourhost = to_s3c(host); unsigned long rate, min = ULONG_MAX; int src; for (src = 0; src < MAX_BUS_CLK; src++) { rate = ourhost->clk_rates[src] / 256; if (!rate) continue; if (rate < min) min = rate; } return min; } /* sdhci_cmu_get_max_clk - callback to get maximum clock frequency.*/ static unsigned int sdhci_cmu_get_max_clock(struct sdhci_host *host) { struct sdhci_s3c *ourhost = to_s3c(host); unsigned long rate, max = 0; int src; for (src = 0; src < MAX_BUS_CLK; src++) { struct clk *clk; clk = ourhost->clk_bus[src]; if (IS_ERR(clk)) continue; rate = clk_round_rate(clk, ULONG_MAX); if (rate > max) max = rate; } return max; } /* sdhci_cmu_get_min_clock - callback to get minimal supported clock value. */ static unsigned int sdhci_cmu_get_min_clock(struct sdhci_host *host) { struct sdhci_s3c *ourhost = to_s3c(host); unsigned long rate, min = ULONG_MAX; int src; for (src = 0; src < MAX_BUS_CLK; src++) { struct clk *clk; clk = ourhost->clk_bus[src]; if (IS_ERR(clk)) continue; rate = clk_round_rate(clk, 0); if (rate < min) min = rate; } return min; } /* sdhci_cmu_set_clock - callback on clock change.*/ static void sdhci_cmu_set_clock(struct sdhci_host *host, unsigned int clock) { struct sdhci_s3c *ourhost = to_s3c(host); struct device *dev = &ourhost->pdev->dev; unsigned long timeout; u16 clk = 0; int ret; host->mmc->actual_clock = 0; /* If the clock is going off, set to 0 at clock control register */ if (clock == 0) { sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL); return; } sdhci_s3c_set_clock(host, clock); /* Reset SD Clock Enable */ clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL); clk &= ~SDHCI_CLOCK_CARD_EN; sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); ret = clk_set_rate(ourhost->clk_bus[ourhost->cur_clk], clock); if (ret != 0) { dev_err(dev, "%s: failed to set clock rate %uHz\n", mmc_hostname(host->mmc), clock); return; } clk = SDHCI_CLOCK_INT_EN; sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); /* Wait max 20 ms */ timeout = 20; while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL)) & SDHCI_CLOCK_INT_STABLE)) { if (timeout == 0) { dev_err(dev, "%s: Internal clock never stabilised.\n", mmc_hostname(host->mmc)); return; } timeout--; mdelay(1); } clk |= SDHCI_CLOCK_CARD_EN; sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); } static struct sdhci_ops sdhci_s3c_ops = { .get_max_clock = sdhci_s3c_get_max_clk, .set_clock = sdhci_s3c_set_clock, .get_min_clock = sdhci_s3c_get_min_clock, .set_bus_width = sdhci_set_bus_width, .reset = sdhci_reset, .set_uhs_signaling = sdhci_set_uhs_signaling, }; #ifdef CONFIG_OF static int sdhci_s3c_parse_dt(struct device *dev, struct sdhci_host *host, struct s3c_sdhci_platdata *pdata) { struct device_node *node = dev->of_node; u32 max_width; /* if the bus-width property is not specified, assume width as 1 */ if (of_property_read_u32(node, "bus-width", &max_width)) max_width = 1; pdata->max_width = max_width; /* get the card detection method */ if (of_get_property(node, "broken-cd", NULL)) { pdata->cd_type = S3C_SDHCI_CD_NONE; return 0; } if (of_get_property(node, "non-removable", NULL)) { pdata->cd_type = S3C_SDHCI_CD_PERMANENT; return 0; } if (of_get_named_gpio(node, "cd-gpios", 0)) return 0; /* assuming internal card detect that will be configured by pinctrl */ pdata->cd_type = S3C_SDHCI_CD_INTERNAL; return 0; } #else static int sdhci_s3c_parse_dt(struct device *dev, struct sdhci_host *host, struct s3c_sdhci_platdata *pdata) { return -EINVAL; } #endif static const struct of_device_id sdhci_s3c_dt_match[]; static inline struct sdhci_s3c_drv_data *sdhci_s3c_get_driver_data( struct platform_device *pdev) { #ifdef CONFIG_OF if (pdev->dev.of_node) { const struct of_device_id *match; match = of_match_node(sdhci_s3c_dt_match, pdev->dev.of_node); return (struct sdhci_s3c_drv_data *)match->data; } #endif return (struct sdhci_s3c_drv_data *) platform_get_device_id(pdev)->driver_data; } static int sdhci_s3c_probe(struct platform_device *pdev) { struct s3c_sdhci_platdata *pdata; struct sdhci_s3c_drv_data *drv_data; struct device *dev = &pdev->dev; struct sdhci_host *host; struct sdhci_s3c *sc; struct resource *res; int ret, irq, ptr, clks; if (!pdev->dev.platform_data && !pdev->dev.of_node) { dev_err(dev, "no device data specified\n"); return -ENOENT; } irq = platform_get_irq(pdev, 0); if (irq < 0) return irq; host = sdhci_alloc_host(dev, sizeof(struct sdhci_s3c)); if (IS_ERR(host)) { dev_err(dev, "sdhci_alloc_host() failed\n"); return PTR_ERR(host); } sc = sdhci_priv(host); pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) { ret = -ENOMEM; goto err_pdata_io_clk; } if (pdev->dev.of_node) { ret = sdhci_s3c_parse_dt(&pdev->dev, host, pdata); if (ret) goto err_pdata_io_clk; } else { memcpy(pdata, pdev->dev.platform_data, sizeof(*pdata)); sc->ext_cd_gpio = -1; /* invalid gpio number */ } drv_data = sdhci_s3c_get_driver_data(pdev); sc->host = host; sc->pdev = pdev; sc->pdata = pdata; sc->cur_clk = -1; platform_set_drvdata(pdev, host); sc->clk_io = devm_clk_get(dev, "hsmmc"); if (IS_ERR(sc->clk_io)) { dev_err(dev, "failed to get io clock\n"); ret = PTR_ERR(sc->clk_io); goto err_pdata_io_clk; } /* enable the local io clock and keep it running for the moment. */ clk_prepare_enable(sc->clk_io); for (clks = 0, ptr = 0; ptr < MAX_BUS_CLK; ptr++) { char name[14]; snprintf(name, 14, "mmc_busclk.%d", ptr); sc->clk_bus[ptr] = devm_clk_get(dev, name); if (IS_ERR(sc->clk_bus[ptr])) continue; clks++; sc->clk_rates[ptr] = clk_get_rate(sc->clk_bus[ptr]); dev_info(dev, "clock source %d: %s (%ld Hz)\n", ptr, name, sc->clk_rates[ptr]); } if (clks == 0) { dev_err(dev, "failed to find any bus clocks\n"); ret = -ENOENT; goto err_no_busclks; } res = platform_get_resource(pdev, IORESOURCE_MEM, 0); host->ioaddr = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(host->ioaddr)) { ret = PTR_ERR(host->ioaddr); goto err_req_regs; } /* Ensure we have minimal gpio selected CMD/CLK/Detect */ if (pdata->cfg_gpio) pdata->cfg_gpio(pdev, pdata->max_width); host->hw_name = "samsung-hsmmc"; host->ops = &sdhci_s3c_ops; host->quirks = 0; host->quirks2 = 0; host->irq = irq; /* Setup quirks for the controller */ host->quirks |= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC; host->quirks |= SDHCI_QUIRK_NO_HISPD_BIT; if (drv_data) { host->quirks |= drv_data->sdhci_quirks; sc->no_divider = drv_data->no_divider; } #ifndef CONFIG_MMC_SDHCI_S3C_DMA /* we currently see overruns on errors, so disable the SDMA * support as well. */ host->quirks |= SDHCI_QUIRK_BROKEN_DMA; #endif /* CONFIG_MMC_SDHCI_S3C_DMA */ /* It seems we do not get an DATA transfer complete on non-busy * transfers, not sure if this is a problem with this specific * SDHCI block, or a missing configuration that needs to be set. */ host->quirks |= SDHCI_QUIRK_NO_BUSY_IRQ; /* This host supports the Auto CMD12 */ host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12; /* Samsung SoCs need BROKEN_ADMA_ZEROLEN_DESC */ host->quirks |= SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC; if (pdata->cd_type == S3C_SDHCI_CD_NONE || pdata->cd_type == S3C_SDHCI_CD_PERMANENT) host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION; if (pdata->cd_type == S3C_SDHCI_CD_PERMANENT) host->mmc->caps = MMC_CAP_NONREMOVABLE; switch (pdata->max_width) { case 8: host->mmc->caps |= MMC_CAP_8_BIT_DATA; /* Fall through */ case 4: host->mmc->caps |= MMC_CAP_4_BIT_DATA; break; } if (pdata->pm_caps) host->mmc->pm_caps |= pdata->pm_caps; host->quirks |= (SDHCI_QUIRK_32BIT_DMA_ADDR | SDHCI_QUIRK_32BIT_DMA_SIZE); /* HSMMC on Samsung SoCs uses SDCLK as timeout clock */ host->quirks |= SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK; /* * If controller does not have internal clock divider, * we can use overriding functions instead of default. */ if (sc->no_divider) { sdhci_s3c_ops.set_clock = sdhci_cmu_set_clock; sdhci_s3c_ops.get_min_clock = sdhci_cmu_get_min_clock; sdhci_s3c_ops.get_max_clock = sdhci_cmu_get_max_clock; } /* It supports additional host capabilities if needed */ if (pdata->host_caps) host->mmc->caps |= pdata->host_caps; if (pdata->host_caps2) host->mmc->caps2 |= pdata->host_caps2; pm_runtime_enable(&pdev->dev); pm_runtime_set_autosuspend_delay(&pdev->dev, 50); pm_runtime_use_autosuspend(&pdev->dev); pm_suspend_ignore_children(&pdev->dev, 1); ret = mmc_of_parse(host->mmc); if (ret) goto err_req_regs; ret = sdhci_add_host(host); if (ret) goto err_req_regs; #ifdef CONFIG_PM if (pdata->cd_type != S3C_SDHCI_CD_INTERNAL) clk_disable_unprepare(sc->clk_io); #endif return 0; err_req_regs: pm_runtime_disable(&pdev->dev); err_no_busclks: clk_disable_unprepare(sc->clk_io); err_pdata_io_clk: sdhci_free_host(host); return ret; } static int sdhci_s3c_remove(struct platform_device *pdev) { struct sdhci_host *host = platform_get_drvdata(pdev); struct sdhci_s3c *sc = sdhci_priv(host); if (sc->ext_cd_irq) free_irq(sc->ext_cd_irq, sc); #ifdef CONFIG_PM if (sc->pdata->cd_type != S3C_SDHCI_CD_INTERNAL) clk_prepare_enable(sc->clk_io); #endif sdhci_remove_host(host, 1); pm_runtime_dont_use_autosuspend(&pdev->dev); pm_runtime_disable(&pdev->dev); clk_disable_unprepare(sc->clk_io); sdhci_free_host(host); return 0; } #ifdef CONFIG_PM_SLEEP static int sdhci_s3c_suspend(struct device *dev) { struct sdhci_host *host = dev_get_drvdata(dev); if (host->tuning_mode != SDHCI_TUNING_MODE_3) mmc_retune_needed(host->mmc); return sdhci_suspend_host(host); } static int sdhci_s3c_resume(struct device *dev) { struct sdhci_host *host = dev_get_drvdata(dev); return sdhci_resume_host(host); } #endif #ifdef CONFIG_PM static int sdhci_s3c_runtime_suspend(struct device *dev) { struct sdhci_host *host = dev_get_drvdata(dev); struct sdhci_s3c *ourhost = to_s3c(host); struct clk *busclk = ourhost->clk_io; int ret; ret = sdhci_runtime_suspend_host(host); if (host->tuning_mode != SDHCI_TUNING_MODE_3) mmc_retune_needed(host->mmc); if (ourhost->cur_clk >= 0) clk_disable_unprepare(ourhost->clk_bus[ourhost->cur_clk]); clk_disable_unprepare(busclk); return ret; } static int sdhci_s3c_runtime_resume(struct device *dev) { struct sdhci_host *host = dev_get_drvdata(dev); struct sdhci_s3c *ourhost = to_s3c(host); struct clk *busclk = ourhost->clk_io; int ret; clk_prepare_enable(busclk); if (ourhost->cur_clk >= 0) clk_prepare_enable(ourhost->clk_bus[ourhost->cur_clk]); ret = sdhci_runtime_resume_host(host, 0); return ret; } #endif static const struct dev_pm_ops sdhci_s3c_pmops = { SET_SYSTEM_SLEEP_PM_OPS(sdhci_s3c_suspend, sdhci_s3c_resume) SET_RUNTIME_PM_OPS(sdhci_s3c_runtime_suspend, sdhci_s3c_runtime_resume, NULL) }; static const struct platform_device_id sdhci_s3c_driver_ids[] = { { .name = "s3c-sdhci", .driver_data = (kernel_ulong_t)NULL, }, { } }; MODULE_DEVICE_TABLE(platform, sdhci_s3c_driver_ids); #ifdef CONFIG_OF static struct sdhci_s3c_drv_data exynos4_sdhci_drv_data = { .no_divider = true, }; static const struct of_device_id sdhci_s3c_dt_match[] = { { .compatible = "samsung,s3c6410-sdhci", }, { .compatible = "samsung,exynos4210-sdhci", .data = &exynos4_sdhci_drv_data }, {}, }; MODULE_DEVICE_TABLE(of, sdhci_s3c_dt_match); #endif static struct platform_driver sdhci_s3c_driver = { .probe = sdhci_s3c_probe, .remove = sdhci_s3c_remove, .id_table = sdhci_s3c_driver_ids, .driver = { .name = "s3c-sdhci", .of_match_table = of_match_ptr(sdhci_s3c_dt_match), .pm = &sdhci_s3c_pmops, }, }; module_platform_driver(sdhci_s3c_driver); MODULE_DESCRIPTION("Samsung SDHCI (HSMMC) glue"); MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>"); MODULE_LICENSE("GPL v2"); MODULE_ALIAS("platform:s3c-sdhci");
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