| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| JiSheng Zhang | 1369 | 43.47% | 7 | 30.43% |
| Shawn Lin | 1047 | 33.25% | 2 | 8.70% |
| Yifeng Zhao | 359 | 11.40% | 2 | 8.70% |
| Liming Sun | 315 | 10.00% | 6 | 26.09% |
| Sebastian Reichel | 25 | 0.79% | 1 | 4.35% |
| Vasily Khoruzhick | 19 | 0.60% | 1 | 4.35% |
| Wei Yongjun | 7 | 0.22% | 1 | 4.35% |
| Doug Anderson | 5 | 0.16% | 1 | 4.35% |
| Yangtao Li | 2 | 0.06% | 1 | 4.35% |
| Rob Herring | 1 | 0.03% | 1 | 4.35% |
| Total | 3149 | 23 |
// SPDX-License-Identifier: GPL-2.0 /* * Driver for Synopsys DesignWare Cores Mobile Storage Host Controller * * Copyright (C) 2018 Synaptics Incorporated * * Author: Jisheng Zhang <jszhang@kernel.org> */ #include <linux/acpi.h> #include <linux/clk.h> #include <linux/dma-mapping.h> #include <linux/iopoll.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <linux/reset.h> #include <linux/sizes.h> #include "sdhci-pltfm.h" #define SDHCI_DWCMSHC_ARG2_STUFF GENMASK(31, 16) /* DWCMSHC specific Mode Select value */ #define DWCMSHC_CTRL_HS400 0x7 /* DWC IP vendor area 1 pointer */ #define DWCMSHC_P_VENDOR_AREA1 0xe8 #define DWCMSHC_AREA1_MASK GENMASK(11, 0) /* Offset inside the vendor area 1 */ #define DWCMSHC_HOST_CTRL3 0x8 #define DWCMSHC_EMMC_CONTROL 0x2c #define DWCMSHC_CARD_IS_EMMC BIT(0) #define DWCMSHC_ENHANCED_STROBE BIT(8) #define DWCMSHC_EMMC_ATCTRL 0x40 /* Rockchip specific Registers */ #define DWCMSHC_EMMC_DLL_CTRL 0x800 #define DWCMSHC_EMMC_DLL_RXCLK 0x804 #define DWCMSHC_EMMC_DLL_TXCLK 0x808 #define DWCMSHC_EMMC_DLL_STRBIN 0x80c #define DECMSHC_EMMC_DLL_CMDOUT 0x810 #define DWCMSHC_EMMC_DLL_STATUS0 0x840 #define DWCMSHC_EMMC_DLL_START BIT(0) #define DWCMSHC_EMMC_DLL_LOCKED BIT(8) #define DWCMSHC_EMMC_DLL_TIMEOUT BIT(9) #define DWCMSHC_EMMC_DLL_RXCLK_SRCSEL 29 #define DWCMSHC_EMMC_DLL_START_POINT 16 #define DWCMSHC_EMMC_DLL_INC 8 #define DWCMSHC_EMMC_DLL_BYPASS BIT(24) #define DWCMSHC_EMMC_DLL_DLYENA BIT(27) #define DLL_TXCLK_TAPNUM_DEFAULT 0x10 #define DLL_TXCLK_TAPNUM_90_DEGREES 0xA #define DLL_TXCLK_TAPNUM_FROM_SW BIT(24) #define DLL_STRBIN_TAPNUM_DEFAULT 0x8 #define DLL_STRBIN_TAPNUM_FROM_SW BIT(24) #define DLL_STRBIN_DELAY_NUM_SEL BIT(26) #define DLL_STRBIN_DELAY_NUM_OFFSET 16 #define DLL_STRBIN_DELAY_NUM_DEFAULT 0x16 #define DLL_RXCLK_NO_INVERTER 1 #define DLL_RXCLK_INVERTER 0 #define DLL_CMDOUT_TAPNUM_90_DEGREES 0x8 #define DLL_RXCLK_ORI_GATE BIT(31) #define DLL_CMDOUT_TAPNUM_FROM_SW BIT(24) #define DLL_CMDOUT_SRC_CLK_NEG BIT(28) #define DLL_CMDOUT_EN_SRC_CLK_NEG BIT(29) #define DLL_LOCK_WO_TMOUT(x) \ ((((x) & DWCMSHC_EMMC_DLL_LOCKED) == DWCMSHC_EMMC_DLL_LOCKED) && \ (((x) & DWCMSHC_EMMC_DLL_TIMEOUT) == 0)) #define RK35xx_MAX_CLKS 3 #define BOUNDARY_OK(addr, len) \ ((addr | (SZ_128M - 1)) == ((addr + len - 1) | (SZ_128M - 1))) enum dwcmshc_rk_type { DWCMSHC_RK3568, DWCMSHC_RK3588, }; struct rk35xx_priv { /* Rockchip specified optional clocks */ struct clk_bulk_data rockchip_clks[RK35xx_MAX_CLKS]; struct reset_control *reset; enum dwcmshc_rk_type devtype; u8 txclk_tapnum; }; struct dwcmshc_priv { struct clk *bus_clk; int vendor_specific_area1; /* P_VENDOR_SPECIFIC_AREA reg */ void *priv; /* pointer to SoC private stuff */ }; /* * If DMA addr spans 128MB boundary, we split the DMA transfer into two * so that each DMA transfer doesn't exceed the boundary. */ static void dwcmshc_adma_write_desc(struct sdhci_host *host, void **desc, dma_addr_t addr, int len, unsigned int cmd) { int tmplen, offset; if (likely(!len || BOUNDARY_OK(addr, len))) { sdhci_adma_write_desc(host, desc, addr, len, cmd); return; } offset = addr & (SZ_128M - 1); tmplen = SZ_128M - offset; sdhci_adma_write_desc(host, desc, addr, tmplen, cmd); addr += tmplen; len -= tmplen; sdhci_adma_write_desc(host, desc, addr, len, cmd); } static unsigned int dwcmshc_get_max_clock(struct sdhci_host *host) { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); if (pltfm_host->clk) return sdhci_pltfm_clk_get_max_clock(host); else return pltfm_host->clock; } static unsigned int rk35xx_get_max_clock(struct sdhci_host *host) { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); return clk_round_rate(pltfm_host->clk, ULONG_MAX); } static void dwcmshc_check_auto_cmd23(struct mmc_host *mmc, struct mmc_request *mrq) { struct sdhci_host *host = mmc_priv(mmc); /* * No matter V4 is enabled or not, ARGUMENT2 register is 32-bit * block count register which doesn't support stuff bits of * CMD23 argument on dwcmsch host controller. */ if (mrq->sbc && (mrq->sbc->arg & SDHCI_DWCMSHC_ARG2_STUFF)) host->flags &= ~SDHCI_AUTO_CMD23; else host->flags |= SDHCI_AUTO_CMD23; } static void dwcmshc_request(struct mmc_host *mmc, struct mmc_request *mrq) { dwcmshc_check_auto_cmd23(mmc, mrq); sdhci_request(mmc, mrq); } static void dwcmshc_set_uhs_signaling(struct sdhci_host *host, unsigned int timing) { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host); u16 ctrl, ctrl_2; ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2); /* Select Bus Speed Mode for host */ ctrl_2 &= ~SDHCI_CTRL_UHS_MASK; if ((timing == MMC_TIMING_MMC_HS200) || (timing == MMC_TIMING_UHS_SDR104)) ctrl_2 |= SDHCI_CTRL_UHS_SDR104; else if (timing == MMC_TIMING_UHS_SDR12) ctrl_2 |= SDHCI_CTRL_UHS_SDR12; else if ((timing == MMC_TIMING_UHS_SDR25) || (timing == MMC_TIMING_MMC_HS)) ctrl_2 |= SDHCI_CTRL_UHS_SDR25; else if (timing == MMC_TIMING_UHS_SDR50) ctrl_2 |= SDHCI_CTRL_UHS_SDR50; else if ((timing == MMC_TIMING_UHS_DDR50) || (timing == MMC_TIMING_MMC_DDR52)) ctrl_2 |= SDHCI_CTRL_UHS_DDR50; else if (timing == MMC_TIMING_MMC_HS400) { /* set CARD_IS_EMMC bit to enable Data Strobe for HS400 */ ctrl = sdhci_readw(host, priv->vendor_specific_area1 + DWCMSHC_EMMC_CONTROL); ctrl |= DWCMSHC_CARD_IS_EMMC; sdhci_writew(host, ctrl, priv->vendor_specific_area1 + DWCMSHC_EMMC_CONTROL); ctrl_2 |= DWCMSHC_CTRL_HS400; } sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2); } static void dwcmshc_hs400_enhanced_strobe(struct mmc_host *mmc, struct mmc_ios *ios) { u32 vendor; struct sdhci_host *host = mmc_priv(mmc); struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host); int reg = priv->vendor_specific_area1 + DWCMSHC_EMMC_CONTROL; vendor = sdhci_readl(host, reg); if (ios->enhanced_strobe) vendor |= DWCMSHC_ENHANCED_STROBE; else vendor &= ~DWCMSHC_ENHANCED_STROBE; sdhci_writel(host, vendor, reg); } static void dwcmshc_rk3568_set_clock(struct sdhci_host *host, unsigned int clock) { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct dwcmshc_priv *dwc_priv = sdhci_pltfm_priv(pltfm_host); struct rk35xx_priv *priv = dwc_priv->priv; u8 txclk_tapnum = DLL_TXCLK_TAPNUM_DEFAULT; u32 extra, reg; int err; host->mmc->actual_clock = 0; if (clock == 0) { /* Disable interface clock at initial state. */ sdhci_set_clock(host, clock); return; } /* Rockchip platform only support 375KHz for identify mode */ if (clock <= 400000) clock = 375000; err = clk_set_rate(pltfm_host->clk, clock); if (err) dev_err(mmc_dev(host->mmc), "fail to set clock %d", clock); sdhci_set_clock(host, clock); /* Disable cmd conflict check */ reg = dwc_priv->vendor_specific_area1 + DWCMSHC_HOST_CTRL3; extra = sdhci_readl(host, reg); extra &= ~BIT(0); sdhci_writel(host, extra, reg); if (clock <= 52000000) { /* * Disable DLL and reset both of sample and drive clock. * The bypass bit and start bit need to be set if DLL is not locked. */ sdhci_writel(host, DWCMSHC_EMMC_DLL_BYPASS | DWCMSHC_EMMC_DLL_START, DWCMSHC_EMMC_DLL_CTRL); sdhci_writel(host, DLL_RXCLK_ORI_GATE, DWCMSHC_EMMC_DLL_RXCLK); sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_TXCLK); sdhci_writel(host, 0, DECMSHC_EMMC_DLL_CMDOUT); /* * Before switching to hs400es mode, the driver will enable * enhanced strobe first. PHY needs to configure the parameters * of enhanced strobe first. */ extra = DWCMSHC_EMMC_DLL_DLYENA | DLL_STRBIN_DELAY_NUM_SEL | DLL_STRBIN_DELAY_NUM_DEFAULT << DLL_STRBIN_DELAY_NUM_OFFSET; sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_STRBIN); return; } /* Reset DLL */ sdhci_writel(host, BIT(1), DWCMSHC_EMMC_DLL_CTRL); udelay(1); sdhci_writel(host, 0x0, DWCMSHC_EMMC_DLL_CTRL); /* * We shouldn't set DLL_RXCLK_NO_INVERTER for identify mode but * we must set it in higher speed mode. */ extra = DWCMSHC_EMMC_DLL_DLYENA; if (priv->devtype == DWCMSHC_RK3568) extra |= DLL_RXCLK_NO_INVERTER << DWCMSHC_EMMC_DLL_RXCLK_SRCSEL; sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_RXCLK); /* Init DLL settings */ extra = 0x5 << DWCMSHC_EMMC_DLL_START_POINT | 0x2 << DWCMSHC_EMMC_DLL_INC | DWCMSHC_EMMC_DLL_START; sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_CTRL); err = readl_poll_timeout(host->ioaddr + DWCMSHC_EMMC_DLL_STATUS0, extra, DLL_LOCK_WO_TMOUT(extra), 1, 500 * USEC_PER_MSEC); if (err) { dev_err(mmc_dev(host->mmc), "DLL lock timeout!\n"); return; } extra = 0x1 << 16 | /* tune clock stop en */ 0x3 << 17 | /* pre-change delay */ 0x3 << 19; /* post-change delay */ sdhci_writel(host, extra, dwc_priv->vendor_specific_area1 + DWCMSHC_EMMC_ATCTRL); if (host->mmc->ios.timing == MMC_TIMING_MMC_HS200 || host->mmc->ios.timing == MMC_TIMING_MMC_HS400) txclk_tapnum = priv->txclk_tapnum; if ((priv->devtype == DWCMSHC_RK3588) && host->mmc->ios.timing == MMC_TIMING_MMC_HS400) { txclk_tapnum = DLL_TXCLK_TAPNUM_90_DEGREES; extra = DLL_CMDOUT_SRC_CLK_NEG | DLL_CMDOUT_EN_SRC_CLK_NEG | DWCMSHC_EMMC_DLL_DLYENA | DLL_CMDOUT_TAPNUM_90_DEGREES | DLL_CMDOUT_TAPNUM_FROM_SW; sdhci_writel(host, extra, DECMSHC_EMMC_DLL_CMDOUT); } extra = DWCMSHC_EMMC_DLL_DLYENA | DLL_TXCLK_TAPNUM_FROM_SW | DLL_RXCLK_NO_INVERTER << DWCMSHC_EMMC_DLL_RXCLK_SRCSEL | txclk_tapnum; sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_TXCLK); extra = DWCMSHC_EMMC_DLL_DLYENA | DLL_STRBIN_TAPNUM_DEFAULT | DLL_STRBIN_TAPNUM_FROM_SW; sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_STRBIN); } static void rk35xx_sdhci_reset(struct sdhci_host *host, u8 mask) { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct dwcmshc_priv *dwc_priv = sdhci_pltfm_priv(pltfm_host); struct rk35xx_priv *priv = dwc_priv->priv; if (mask & SDHCI_RESET_ALL && priv->reset) { reset_control_assert(priv->reset); udelay(1); reset_control_deassert(priv->reset); } sdhci_reset(host, mask); } static const struct sdhci_ops sdhci_dwcmshc_ops = { .set_clock = sdhci_set_clock, .set_bus_width = sdhci_set_bus_width, .set_uhs_signaling = dwcmshc_set_uhs_signaling, .get_max_clock = dwcmshc_get_max_clock, .reset = sdhci_reset, .adma_write_desc = dwcmshc_adma_write_desc, }; static const struct sdhci_ops sdhci_dwcmshc_rk35xx_ops = { .set_clock = dwcmshc_rk3568_set_clock, .set_bus_width = sdhci_set_bus_width, .set_uhs_signaling = dwcmshc_set_uhs_signaling, .get_max_clock = rk35xx_get_max_clock, .reset = rk35xx_sdhci_reset, .adma_write_desc = dwcmshc_adma_write_desc, }; static const struct sdhci_pltfm_data sdhci_dwcmshc_pdata = { .ops = &sdhci_dwcmshc_ops, .quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN, .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN, }; #ifdef CONFIG_ACPI static const struct sdhci_pltfm_data sdhci_dwcmshc_bf3_pdata = { .ops = &sdhci_dwcmshc_ops, .quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN, .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN | SDHCI_QUIRK2_ACMD23_BROKEN, }; #endif static const struct sdhci_pltfm_data sdhci_dwcmshc_rk35xx_pdata = { .ops = &sdhci_dwcmshc_rk35xx_ops, .quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN | SDHCI_QUIRK_BROKEN_TIMEOUT_VAL, .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN | SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN, }; static int dwcmshc_rk35xx_init(struct sdhci_host *host, struct dwcmshc_priv *dwc_priv) { int err; struct rk35xx_priv *priv = dwc_priv->priv; priv->reset = devm_reset_control_array_get_optional_exclusive(mmc_dev(host->mmc)); if (IS_ERR(priv->reset)) { err = PTR_ERR(priv->reset); dev_err(mmc_dev(host->mmc), "failed to get reset control %d\n", err); return err; } priv->rockchip_clks[0].id = "axi"; priv->rockchip_clks[1].id = "block"; priv->rockchip_clks[2].id = "timer"; err = devm_clk_bulk_get_optional(mmc_dev(host->mmc), RK35xx_MAX_CLKS, priv->rockchip_clks); if (err) { dev_err(mmc_dev(host->mmc), "failed to get clocks %d\n", err); return err; } err = clk_bulk_prepare_enable(RK35xx_MAX_CLKS, priv->rockchip_clks); if (err) { dev_err(mmc_dev(host->mmc), "failed to enable clocks %d\n", err); return err; } if (of_property_read_u8(mmc_dev(host->mmc)->of_node, "rockchip,txclk-tapnum", &priv->txclk_tapnum)) priv->txclk_tapnum = DLL_TXCLK_TAPNUM_DEFAULT; /* Disable cmd conflict check */ sdhci_writel(host, 0x0, dwc_priv->vendor_specific_area1 + DWCMSHC_HOST_CTRL3); /* Reset previous settings */ sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_TXCLK); sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_STRBIN); return 0; } static void dwcmshc_rk35xx_postinit(struct sdhci_host *host, struct dwcmshc_priv *dwc_priv) { /* * Don't support highspeed bus mode with low clk speed as we * cannot use DLL for this condition. */ if (host->mmc->f_max <= 52000000) { dev_info(mmc_dev(host->mmc), "Disabling HS200/HS400, frequency too low (%d)\n", host->mmc->f_max); host->mmc->caps2 &= ~(MMC_CAP2_HS200 | MMC_CAP2_HS400); host->mmc->caps &= ~(MMC_CAP_3_3V_DDR | MMC_CAP_1_8V_DDR); } } static const struct of_device_id sdhci_dwcmshc_dt_ids[] = { { .compatible = "rockchip,rk3588-dwcmshc", .data = &sdhci_dwcmshc_rk35xx_pdata, }, { .compatible = "rockchip,rk3568-dwcmshc", .data = &sdhci_dwcmshc_rk35xx_pdata, }, { .compatible = "snps,dwcmshc-sdhci", .data = &sdhci_dwcmshc_pdata, }, {}, }; MODULE_DEVICE_TABLE(of, sdhci_dwcmshc_dt_ids); #ifdef CONFIG_ACPI static const struct acpi_device_id sdhci_dwcmshc_acpi_ids[] = { { .id = "MLNXBF30", .driver_data = (kernel_ulong_t)&sdhci_dwcmshc_bf3_pdata, }, {} }; MODULE_DEVICE_TABLE(acpi, sdhci_dwcmshc_acpi_ids); #endif static int dwcmshc_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct sdhci_pltfm_host *pltfm_host; struct sdhci_host *host; struct dwcmshc_priv *priv; struct rk35xx_priv *rk_priv = NULL; const struct sdhci_pltfm_data *pltfm_data; int err; u32 extra; pltfm_data = device_get_match_data(&pdev->dev); if (!pltfm_data) { dev_err(&pdev->dev, "Error: No device match data found\n"); return -ENODEV; } host = sdhci_pltfm_init(pdev, pltfm_data, sizeof(struct dwcmshc_priv)); if (IS_ERR(host)) return PTR_ERR(host); /* * extra adma table cnt for cross 128M boundary handling. */ extra = DIV_ROUND_UP_ULL(dma_get_required_mask(dev), SZ_128M); if (extra > SDHCI_MAX_SEGS) extra = SDHCI_MAX_SEGS; host->adma_table_cnt += extra; pltfm_host = sdhci_priv(host); priv = sdhci_pltfm_priv(pltfm_host); if (dev->of_node) { pltfm_host->clk = devm_clk_get(dev, "core"); if (IS_ERR(pltfm_host->clk)) { err = PTR_ERR(pltfm_host->clk); dev_err(dev, "failed to get core clk: %d\n", err); goto free_pltfm; } err = clk_prepare_enable(pltfm_host->clk); if (err) goto free_pltfm; priv->bus_clk = devm_clk_get(dev, "bus"); if (!IS_ERR(priv->bus_clk)) clk_prepare_enable(priv->bus_clk); } err = mmc_of_parse(host->mmc); if (err) goto err_clk; sdhci_get_of_property(pdev); priv->vendor_specific_area1 = sdhci_readl(host, DWCMSHC_P_VENDOR_AREA1) & DWCMSHC_AREA1_MASK; host->mmc_host_ops.request = dwcmshc_request; host->mmc_host_ops.hs400_enhanced_strobe = dwcmshc_hs400_enhanced_strobe; if (pltfm_data == &sdhci_dwcmshc_rk35xx_pdata) { rk_priv = devm_kzalloc(&pdev->dev, sizeof(struct rk35xx_priv), GFP_KERNEL); if (!rk_priv) { err = -ENOMEM; goto err_clk; } if (of_device_is_compatible(pdev->dev.of_node, "rockchip,rk3588-dwcmshc")) rk_priv->devtype = DWCMSHC_RK3588; else rk_priv->devtype = DWCMSHC_RK3568; priv->priv = rk_priv; err = dwcmshc_rk35xx_init(host, priv); if (err) goto err_clk; } #ifdef CONFIG_ACPI if (pltfm_data == &sdhci_dwcmshc_bf3_pdata) sdhci_enable_v4_mode(host); #endif host->mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY; pm_runtime_get_noresume(dev); pm_runtime_set_active(dev); pm_runtime_enable(dev); err = sdhci_setup_host(host); if (err) goto err_rpm; if (rk_priv) dwcmshc_rk35xx_postinit(host, priv); err = __sdhci_add_host(host); if (err) goto err_setup_host; pm_runtime_put(dev); return 0; err_setup_host: sdhci_cleanup_host(host); err_rpm: pm_runtime_disable(dev); pm_runtime_put_noidle(dev); err_clk: clk_disable_unprepare(pltfm_host->clk); clk_disable_unprepare(priv->bus_clk); if (rk_priv) clk_bulk_disable_unprepare(RK35xx_MAX_CLKS, rk_priv->rockchip_clks); free_pltfm: sdhci_pltfm_free(pdev); return err; } static void dwcmshc_remove(struct platform_device *pdev) { struct sdhci_host *host = platform_get_drvdata(pdev); struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host); struct rk35xx_priv *rk_priv = priv->priv; sdhci_remove_host(host, 0); clk_disable_unprepare(pltfm_host->clk); clk_disable_unprepare(priv->bus_clk); if (rk_priv) clk_bulk_disable_unprepare(RK35xx_MAX_CLKS, rk_priv->rockchip_clks); sdhci_pltfm_free(pdev); } #ifdef CONFIG_PM_SLEEP static int dwcmshc_suspend(struct device *dev) { struct sdhci_host *host = dev_get_drvdata(dev); struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host); struct rk35xx_priv *rk_priv = priv->priv; int ret; pm_runtime_resume(dev); ret = sdhci_suspend_host(host); if (ret) return ret; clk_disable_unprepare(pltfm_host->clk); if (!IS_ERR(priv->bus_clk)) clk_disable_unprepare(priv->bus_clk); if (rk_priv) clk_bulk_disable_unprepare(RK35xx_MAX_CLKS, rk_priv->rockchip_clks); return ret; } static int dwcmshc_resume(struct device *dev) { struct sdhci_host *host = dev_get_drvdata(dev); struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host); struct rk35xx_priv *rk_priv = priv->priv; int ret; ret = clk_prepare_enable(pltfm_host->clk); if (ret) return ret; if (!IS_ERR(priv->bus_clk)) { ret = clk_prepare_enable(priv->bus_clk); if (ret) goto disable_clk; } if (rk_priv) { ret = clk_bulk_prepare_enable(RK35xx_MAX_CLKS, rk_priv->rockchip_clks); if (ret) goto disable_bus_clk; } ret = sdhci_resume_host(host); if (ret) goto disable_rockchip_clks; return 0; disable_rockchip_clks: if (rk_priv) clk_bulk_disable_unprepare(RK35xx_MAX_CLKS, rk_priv->rockchip_clks); disable_bus_clk: if (!IS_ERR(priv->bus_clk)) clk_disable_unprepare(priv->bus_clk); disable_clk: clk_disable_unprepare(pltfm_host->clk); return ret; } #endif #ifdef CONFIG_PM static void dwcmshc_enable_card_clk(struct sdhci_host *host) { u16 ctrl; ctrl = sdhci_readw(host, SDHCI_CLOCK_CONTROL); if ((ctrl & SDHCI_CLOCK_INT_EN) && !(ctrl & SDHCI_CLOCK_CARD_EN)) { ctrl |= SDHCI_CLOCK_CARD_EN; sdhci_writew(host, ctrl, SDHCI_CLOCK_CONTROL); } } static void dwcmshc_disable_card_clk(struct sdhci_host *host) { u16 ctrl; ctrl = sdhci_readw(host, SDHCI_CLOCK_CONTROL); if (ctrl & SDHCI_CLOCK_CARD_EN) { ctrl &= ~SDHCI_CLOCK_CARD_EN; sdhci_writew(host, ctrl, SDHCI_CLOCK_CONTROL); } } static int dwcmshc_runtime_suspend(struct device *dev) { struct sdhci_host *host = dev_get_drvdata(dev); dwcmshc_disable_card_clk(host); return 0; } static int dwcmshc_runtime_resume(struct device *dev) { struct sdhci_host *host = dev_get_drvdata(dev); dwcmshc_enable_card_clk(host); return 0; } #endif static const struct dev_pm_ops dwcmshc_pmops = { SET_SYSTEM_SLEEP_PM_OPS(dwcmshc_suspend, dwcmshc_resume) SET_RUNTIME_PM_OPS(dwcmshc_runtime_suspend, dwcmshc_runtime_resume, NULL) }; static struct platform_driver sdhci_dwcmshc_driver = { .driver = { .name = "sdhci-dwcmshc", .probe_type = PROBE_PREFER_ASYNCHRONOUS, .of_match_table = sdhci_dwcmshc_dt_ids, .acpi_match_table = ACPI_PTR(sdhci_dwcmshc_acpi_ids), .pm = &dwcmshc_pmops, }, .probe = dwcmshc_probe, .remove_new = dwcmshc_remove, }; module_platform_driver(sdhci_dwcmshc_driver); MODULE_DESCRIPTION("SDHCI platform driver for Synopsys DWC MSHC"); MODULE_AUTHOR("Jisheng Zhang <jszhang@kernel.org>"); MODULE_LICENSE("GPL v2");
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