| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Dong Aisheng | 2962 | 39.66% | 39 | 26.71% |
| Haibo Chen | 1544 | 20.67% | 21 | 14.38% |
| Shawn Guo | 925 | 12.38% | 20 | 13.70% |
| Wolfram Sang | 468 | 6.27% | 4 | 2.74% |
| Richard Zhu | 247 | 3.31% | 3 | 2.05% |
| Lucas Stach | 187 | 2.50% | 3 | 2.05% |
| Sascha Hauer | 173 | 2.32% | 4 | 2.74% |
| Benoît Thébaudeau | 170 | 2.28% | 5 | 3.42% |
| Fabio Estevam | 155 | 2.08% | 5 | 3.42% |
| Aaron Brice | 96 | 1.29% | 1 | 0.68% |
| Andrew Gabbasov | 88 | 1.18% | 1 | 0.68% |
| Tony Lin | 60 | 0.80% | 1 | 0.68% |
| Russell King | 60 | 0.80% | 7 | 4.79% |
| Michael Trimarchi | 52 | 0.70% | 3 | 2.05% |
| Stefan Agner | 51 | 0.68% | 4 | 2.74% |
| Ulf Hansson | 49 | 0.66% | 5 | 3.42% |
| JiSheng Zhang | 49 | 0.66% | 1 | 0.68% |
| Adrian Hunter | 34 | 0.46% | 2 | 1.37% |
| Wilson Callan | 28 | 0.37% | 1 | 0.68% |
| Linus Walleij | 20 | 0.27% | 1 | 0.68% |
| Chaotian Jing | 12 | 0.16% | 1 | 0.68% |
| Eric Bénard | 8 | 0.11% | 2 | 1.37% |
| Andrey Smirnov | 8 | 0.11% | 1 | 0.68% |
| Manuel Lauss | 5 | 0.07% | 1 | 0.68% |
| Martin Fuzzey | 4 | 0.05% | 1 | 0.68% |
| Arnd Bergmann | 3 | 0.04% | 2 | 1.37% |
| Wei Yongjun | 3 | 0.04% | 1 | 0.68% |
| Richard Zhao | 2 | 0.03% | 1 | 0.68% |
| Baolin Wang | 2 | 0.03% | 1 | 0.68% |
| Masanari Iida | 1 | 0.01% | 1 | 0.68% |
| Lars-Peter Clausen | 1 | 0.01% | 1 | 0.68% |
| Krzysztof Kozlowski | 1 | 0.01% | 1 | 0.68% |
| Axel Lin | 1 | 0.01% | 1 | 0.68% |
| Total | 7469 | 146 |
// SPDX-License-Identifier: GPL-2.0 /* * Freescale eSDHC i.MX controller driver for the platform bus. * * derived from the OF-version. * * Copyright (c) 2010 Pengutronix e.K. * Author: Wolfram Sang <kernel@pengutronix.de> */ #include <linux/io.h> #include <linux/delay.h> #include <linux/err.h> #include <linux/clk.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/pm_qos.h> #include <linux/mmc/host.h> #include <linux/mmc/mmc.h> #include <linux/mmc/sdio.h> #include <linux/mmc/slot-gpio.h> #include <linux/of.h> #include <linux/of_device.h> #include <linux/pinctrl/consumer.h> #include <linux/platform_data/mmc-esdhc-imx.h> #include <linux/pm_runtime.h> #include "sdhci-pltfm.h" #include "sdhci-esdhc.h" #include "cqhci.h" #define ESDHC_SYS_CTRL_DTOCV_MASK 0x0f #define ESDHC_CTRL_D3CD 0x08 #define ESDHC_BURST_LEN_EN_INCR (1 << 27) /* VENDOR SPEC register */ #define ESDHC_VENDOR_SPEC 0xc0 #define ESDHC_VENDOR_SPEC_SDIO_QUIRK (1 << 1) #define ESDHC_VENDOR_SPEC_VSELECT (1 << 1) #define ESDHC_VENDOR_SPEC_FRC_SDCLK_ON (1 << 8) #define ESDHC_WTMK_LVL 0x44 #define ESDHC_WTMK_DEFAULT_VAL 0x10401040 #define ESDHC_WTMK_LVL_RD_WML_MASK 0x000000FF #define ESDHC_WTMK_LVL_RD_WML_SHIFT 0 #define ESDHC_WTMK_LVL_WR_WML_MASK 0x00FF0000 #define ESDHC_WTMK_LVL_WR_WML_SHIFT 16 #define ESDHC_WTMK_LVL_WML_VAL_DEF 64 #define ESDHC_WTMK_LVL_WML_VAL_MAX 128 #define ESDHC_MIX_CTRL 0x48 #define ESDHC_MIX_CTRL_DDREN (1 << 3) #define ESDHC_MIX_CTRL_AC23EN (1 << 7) #define ESDHC_MIX_CTRL_EXE_TUNE (1 << 22) #define ESDHC_MIX_CTRL_SMPCLK_SEL (1 << 23) #define ESDHC_MIX_CTRL_AUTO_TUNE_EN (1 << 24) #define ESDHC_MIX_CTRL_FBCLK_SEL (1 << 25) #define ESDHC_MIX_CTRL_HS400_EN (1 << 26) #define ESDHC_MIX_CTRL_HS400_ES_EN (1 << 27) /* Bits 3 and 6 are not SDHCI standard definitions */ #define ESDHC_MIX_CTRL_SDHCI_MASK 0xb7 /* Tuning bits */ #define ESDHC_MIX_CTRL_TUNING_MASK 0x03c00000 /* dll control register */ #define ESDHC_DLL_CTRL 0x60 #define ESDHC_DLL_OVERRIDE_VAL_SHIFT 9 #define ESDHC_DLL_OVERRIDE_EN_SHIFT 8 /* tune control register */ #define ESDHC_TUNE_CTRL_STATUS 0x68 #define ESDHC_TUNE_CTRL_STEP 1 #define ESDHC_TUNE_CTRL_MIN 0 #define ESDHC_TUNE_CTRL_MAX ((1 << 7) - 1) /* strobe dll register */ #define ESDHC_STROBE_DLL_CTRL 0x70 #define ESDHC_STROBE_DLL_CTRL_ENABLE (1 << 0) #define ESDHC_STROBE_DLL_CTRL_RESET (1 << 1) #define ESDHC_STROBE_DLL_CTRL_SLV_DLY_TARGET_SHIFT 3 #define ESDHC_STROBE_DLL_CTRL_SLV_UPDATE_INT_DEFAULT (4 << 20) #define ESDHC_STROBE_DLL_STATUS 0x74 #define ESDHC_STROBE_DLL_STS_REF_LOCK (1 << 1) #define ESDHC_STROBE_DLL_STS_SLV_LOCK 0x1 #define ESDHC_VEND_SPEC2 0xc8 #define ESDHC_VEND_SPEC2_EN_BUSY_IRQ (1 << 8) #define ESDHC_TUNING_CTRL 0xcc #define ESDHC_STD_TUNING_EN (1 << 24) /* NOTE: the minimum valid tuning start tap for mx6sl is 1 */ #define ESDHC_TUNING_START_TAP_DEFAULT 0x1 #define ESDHC_TUNING_START_TAP_MASK 0xff #define ESDHC_TUNING_STEP_MASK 0x00070000 #define ESDHC_TUNING_STEP_SHIFT 16 /* pinctrl state */ #define ESDHC_PINCTRL_STATE_100MHZ "state_100mhz" #define ESDHC_PINCTRL_STATE_200MHZ "state_200mhz" /* * Our interpretation of the SDHCI_HOST_CONTROL register */ #define ESDHC_CTRL_4BITBUS (0x1 << 1) #define ESDHC_CTRL_8BITBUS (0x2 << 1) #define ESDHC_CTRL_BUSWIDTH_MASK (0x3 << 1) /* * There is an INT DMA ERR mismatch between eSDHC and STD SDHC SPEC: * Bit25 is used in STD SPEC, and is reserved in fsl eSDHC design, * but bit28 is used as the INT DMA ERR in fsl eSDHC design. * Define this macro DMA error INT for fsl eSDHC */ #define ESDHC_INT_VENDOR_SPEC_DMA_ERR (1 << 28) /* the address offset of CQHCI */ #define ESDHC_CQHCI_ADDR_OFFSET 0x100 /* * The CMDTYPE of the CMD register (offset 0xE) should be set to * "11" when the STOP CMD12 is issued on imx53 to abort one * open ended multi-blk IO. Otherwise the TC INT wouldn't * be generated. * In exact block transfer, the controller doesn't complete the * operations automatically as required at the end of the * transfer and remains on hold if the abort command is not sent. * As a result, the TC flag is not asserted and SW received timeout * exception. Bit1 of Vendor Spec register is used to fix it. */ #define ESDHC_FLAG_MULTIBLK_NO_INT BIT(1) /* * The flag tells that the ESDHC controller is an USDHC block that is * integrated on the i.MX6 series. */ #define ESDHC_FLAG_USDHC BIT(3) /* The IP supports manual tuning process */ #define ESDHC_FLAG_MAN_TUNING BIT(4) /* The IP supports standard tuning process */ #define ESDHC_FLAG_STD_TUNING BIT(5) /* The IP has SDHCI_CAPABILITIES_1 register */ #define ESDHC_FLAG_HAVE_CAP1 BIT(6) /* * The IP has erratum ERR004536 * uSDHC: ADMA Length Mismatch Error occurs if the AHB read access is slow, * when reading data from the card * This flag is also set for i.MX25 and i.MX35 in order to get * SDHCI_QUIRK_BROKEN_ADMA, but for different reasons (ADMA capability bits). */ #define ESDHC_FLAG_ERR004536 BIT(7) /* The IP supports HS200 mode */ #define ESDHC_FLAG_HS200 BIT(8) /* The IP supports HS400 mode */ #define ESDHC_FLAG_HS400 BIT(9) /* * The IP has errata ERR010450 * uSDHC: Due to the I/O timing limit, for SDR mode, SD card clock can't * exceed 150MHz, for DDR mode, SD card clock can't exceed 45MHz. */ #define ESDHC_FLAG_ERR010450 BIT(10) /* The IP supports HS400ES mode */ #define ESDHC_FLAG_HS400_ES BIT(11) /* The IP has Host Controller Interface for Command Queuing */ #define ESDHC_FLAG_CQHCI BIT(12) /* need request pmqos during low power */ #define ESDHC_FLAG_PMQOS BIT(13) struct esdhc_soc_data { u32 flags; }; static const struct esdhc_soc_data esdhc_imx25_data = { .flags = ESDHC_FLAG_ERR004536, }; static const struct esdhc_soc_data esdhc_imx35_data = { .flags = ESDHC_FLAG_ERR004536, }; static const struct esdhc_soc_data esdhc_imx51_data = { .flags = 0, }; static const struct esdhc_soc_data esdhc_imx53_data = { .flags = ESDHC_FLAG_MULTIBLK_NO_INT, }; static const struct esdhc_soc_data usdhc_imx6q_data = { .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_MAN_TUNING, }; static const struct esdhc_soc_data usdhc_imx6sl_data = { .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_ERR004536 | ESDHC_FLAG_HS200, }; static const struct esdhc_soc_data usdhc_imx6sx_data = { .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200, }; static const struct esdhc_soc_data usdhc_imx6ull_data = { .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200 | ESDHC_FLAG_ERR010450, }; static const struct esdhc_soc_data usdhc_imx7d_data = { .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200 | ESDHC_FLAG_HS400, }; static struct esdhc_soc_data usdhc_imx7ulp_data = { .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200 | ESDHC_FLAG_PMQOS | ESDHC_FLAG_HS400, }; static struct esdhc_soc_data usdhc_imx8qxp_data = { .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200 | ESDHC_FLAG_HS400 | ESDHC_FLAG_HS400_ES | ESDHC_FLAG_CQHCI, }; struct pltfm_imx_data { u32 scratchpad; struct pinctrl *pinctrl; struct pinctrl_state *pins_default; struct pinctrl_state *pins_100mhz; struct pinctrl_state *pins_200mhz; const struct esdhc_soc_data *socdata; struct esdhc_platform_data boarddata; struct clk *clk_ipg; struct clk *clk_ahb; struct clk *clk_per; unsigned int actual_clock; enum { NO_CMD_PENDING, /* no multiblock command pending */ MULTIBLK_IN_PROCESS, /* exact multiblock cmd in process */ WAIT_FOR_INT, /* sent CMD12, waiting for response INT */ } multiblock_status; u32 is_ddr; struct pm_qos_request pm_qos_req; }; static const struct platform_device_id imx_esdhc_devtype[] = { { .name = "sdhci-esdhc-imx25", .driver_data = (kernel_ulong_t) &esdhc_imx25_data, }, { .name = "sdhci-esdhc-imx35", .driver_data = (kernel_ulong_t) &esdhc_imx35_data, }, { .name = "sdhci-esdhc-imx51", .driver_data = (kernel_ulong_t) &esdhc_imx51_data, }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(platform, imx_esdhc_devtype); static const struct of_device_id imx_esdhc_dt_ids[] = { { .compatible = "fsl,imx25-esdhc", .data = &esdhc_imx25_data, }, { .compatible = "fsl,imx35-esdhc", .data = &esdhc_imx35_data, }, { .compatible = "fsl,imx51-esdhc", .data = &esdhc_imx51_data, }, { .compatible = "fsl,imx53-esdhc", .data = &esdhc_imx53_data, }, { .compatible = "fsl,imx6sx-usdhc", .data = &usdhc_imx6sx_data, }, { .compatible = "fsl,imx6sl-usdhc", .data = &usdhc_imx6sl_data, }, { .compatible = "fsl,imx6q-usdhc", .data = &usdhc_imx6q_data, }, { .compatible = "fsl,imx6ull-usdhc", .data = &usdhc_imx6ull_data, }, { .compatible = "fsl,imx7d-usdhc", .data = &usdhc_imx7d_data, }, { .compatible = "fsl,imx7ulp-usdhc", .data = &usdhc_imx7ulp_data, }, { .compatible = "fsl,imx8qxp-usdhc", .data = &usdhc_imx8qxp_data, }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, imx_esdhc_dt_ids); static inline int is_imx25_esdhc(struct pltfm_imx_data *data) { return data->socdata == &esdhc_imx25_data; } static inline int is_imx53_esdhc(struct pltfm_imx_data *data) { return data->socdata == &esdhc_imx53_data; } static inline int is_imx6q_usdhc(struct pltfm_imx_data *data) { return data->socdata == &usdhc_imx6q_data; } static inline int esdhc_is_usdhc(struct pltfm_imx_data *data) { return !!(data->socdata->flags & ESDHC_FLAG_USDHC); } static inline void esdhc_clrset_le(struct sdhci_host *host, u32 mask, u32 val, int reg) { void __iomem *base = host->ioaddr + (reg & ~0x3); u32 shift = (reg & 0x3) * 8; writel(((readl(base) & ~(mask << shift)) | (val << shift)), base); } static u32 esdhc_readl_le(struct sdhci_host *host, int reg) { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host); u32 val = readl(host->ioaddr + reg); if (unlikely(reg == SDHCI_PRESENT_STATE)) { u32 fsl_prss = val; /* save the least 20 bits */ val = fsl_prss & 0x000FFFFF; /* move dat[0-3] bits */ val |= (fsl_prss & 0x0F000000) >> 4; /* move cmd line bit */ val |= (fsl_prss & 0x00800000) << 1; } if (unlikely(reg == SDHCI_CAPABILITIES)) { /* ignore bit[0-15] as it stores cap_1 register val for mx6sl */ if (imx_data->socdata->flags & ESDHC_FLAG_HAVE_CAP1) val &= 0xffff0000; /* In FSL esdhc IC module, only bit20 is used to indicate the * ADMA2 capability of esdhc, but this bit is messed up on * some SOCs (e.g. on MX25, MX35 this bit is set, but they * don't actually support ADMA2). So set the BROKEN_ADMA * quirk on MX25/35 platforms. */ if (val & SDHCI_CAN_DO_ADMA1) { val &= ~SDHCI_CAN_DO_ADMA1; val |= SDHCI_CAN_DO_ADMA2; } } if (unlikely(reg == SDHCI_CAPABILITIES_1)) { if (esdhc_is_usdhc(imx_data)) { if (imx_data->socdata->flags & ESDHC_FLAG_HAVE_CAP1) val = readl(host->ioaddr + SDHCI_CAPABILITIES) & 0xFFFF; else /* imx6q/dl does not have cap_1 register, fake one */ val = SDHCI_SUPPORT_DDR50 | SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 | SDHCI_USE_SDR50_TUNING | (SDHCI_TUNING_MODE_3 << SDHCI_RETUNING_MODE_SHIFT); if (imx_data->socdata->flags & ESDHC_FLAG_HS400) val |= SDHCI_SUPPORT_HS400; /* * Do not advertise faster UHS modes if there are no * pinctrl states for 100MHz/200MHz. */ if (IS_ERR_OR_NULL(imx_data->pins_100mhz) || IS_ERR_OR_NULL(imx_data->pins_200mhz)) val &= ~(SDHCI_SUPPORT_SDR50 | SDHCI_SUPPORT_DDR50 | SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_HS400); } } if (unlikely(reg == SDHCI_MAX_CURRENT) && esdhc_is_usdhc(imx_data)) { val = 0; val |= 0xFF << SDHCI_MAX_CURRENT_330_SHIFT; val |= 0xFF << SDHCI_MAX_CURRENT_300_SHIFT; val |= 0xFF << SDHCI_MAX_CURRENT_180_SHIFT; } if (unlikely(reg == SDHCI_INT_STATUS)) { if (val & ESDHC_INT_VENDOR_SPEC_DMA_ERR) { val &= ~ESDHC_INT_VENDOR_SPEC_DMA_ERR; val |= SDHCI_INT_ADMA_ERROR; } /* * mask off the interrupt we get in response to the manually * sent CMD12 */ if ((imx_data->multiblock_status == WAIT_FOR_INT) && ((val & SDHCI_INT_RESPONSE) == SDHCI_INT_RESPONSE)) { val &= ~SDHCI_INT_RESPONSE; writel(SDHCI_INT_RESPONSE, host->ioaddr + SDHCI_INT_STATUS); imx_data->multiblock_status = NO_CMD_PENDING; } } return val; } static void esdhc_writel_le(struct sdhci_host *host, u32 val, int reg) { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host); u32 data; if (unlikely(reg == SDHCI_INT_ENABLE || reg == SDHCI_SIGNAL_ENABLE || reg == SDHCI_INT_STATUS)) { if ((val & SDHCI_INT_CARD_INT) && !esdhc_is_usdhc(imx_data)) { /* * Clear and then set D3CD bit to avoid missing the * card interrupt. This is an eSDHC controller problem * so we need to apply the following workaround: clear * and set D3CD bit will make eSDHC re-sample the card * interrupt. In case a card interrupt was lost, * re-sample it by the following steps. */ data = readl(host->ioaddr + SDHCI_HOST_CONTROL); data &= ~ESDHC_CTRL_D3CD; writel(data, host->ioaddr + SDHCI_HOST_CONTROL); data |= ESDHC_CTRL_D3CD; writel(data, host->ioaddr + SDHCI_HOST_CONTROL); } if (val & SDHCI_INT_ADMA_ERROR) { val &= ~SDHCI_INT_ADMA_ERROR; val |= ESDHC_INT_VENDOR_SPEC_DMA_ERR; } } if (unlikely((imx_data->socdata->flags & ESDHC_FLAG_MULTIBLK_NO_INT) && (reg == SDHCI_INT_STATUS) && (val & SDHCI_INT_DATA_END))) { u32 v; v = readl(host->ioaddr + ESDHC_VENDOR_SPEC); v &= ~ESDHC_VENDOR_SPEC_SDIO_QUIRK; writel(v, host->ioaddr + ESDHC_VENDOR_SPEC); if (imx_data->multiblock_status == MULTIBLK_IN_PROCESS) { /* send a manual CMD12 with RESPTYP=none */ data = MMC_STOP_TRANSMISSION << 24 | SDHCI_CMD_ABORTCMD << 16; writel(data, host->ioaddr + SDHCI_TRANSFER_MODE); imx_data->multiblock_status = WAIT_FOR_INT; } } writel(val, host->ioaddr + reg); } static u16 esdhc_readw_le(struct sdhci_host *host, int reg) { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host); u16 ret = 0; u32 val; if (unlikely(reg == SDHCI_HOST_VERSION)) { reg ^= 2; if (esdhc_is_usdhc(imx_data)) { /* * The usdhc register returns a wrong host version. * Correct it here. */ return SDHCI_SPEC_300; } } if (unlikely(reg == SDHCI_HOST_CONTROL2)) { val = readl(host->ioaddr + ESDHC_VENDOR_SPEC); if (val & ESDHC_VENDOR_SPEC_VSELECT) ret |= SDHCI_CTRL_VDD_180; if (esdhc_is_usdhc(imx_data)) { if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING) val = readl(host->ioaddr + ESDHC_MIX_CTRL); else if (imx_data->socdata->flags & ESDHC_FLAG_STD_TUNING) /* the std tuning bits is in ACMD12_ERR for imx6sl */ val = readl(host->ioaddr + SDHCI_AUTO_CMD_STATUS); } if (val & ESDHC_MIX_CTRL_EXE_TUNE) ret |= SDHCI_CTRL_EXEC_TUNING; if (val & ESDHC_MIX_CTRL_SMPCLK_SEL) ret |= SDHCI_CTRL_TUNED_CLK; ret &= ~SDHCI_CTRL_PRESET_VAL_ENABLE; return ret; } if (unlikely(reg == SDHCI_TRANSFER_MODE)) { if (esdhc_is_usdhc(imx_data)) { u32 m = readl(host->ioaddr + ESDHC_MIX_CTRL); ret = m & ESDHC_MIX_CTRL_SDHCI_MASK; /* Swap AC23 bit */ if (m & ESDHC_MIX_CTRL_AC23EN) { ret &= ~ESDHC_MIX_CTRL_AC23EN; ret |= SDHCI_TRNS_AUTO_CMD23; } } else { ret = readw(host->ioaddr + SDHCI_TRANSFER_MODE); } return ret; } return readw(host->ioaddr + reg); } static void esdhc_writew_le(struct sdhci_host *host, u16 val, int reg) { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host); u32 new_val = 0; switch (reg) { case SDHCI_CLOCK_CONTROL: new_val = readl(host->ioaddr + ESDHC_VENDOR_SPEC); if (val & SDHCI_CLOCK_CARD_EN) new_val |= ESDHC_VENDOR_SPEC_FRC_SDCLK_ON; else new_val &= ~ESDHC_VENDOR_SPEC_FRC_SDCLK_ON; writel(new_val, host->ioaddr + ESDHC_VENDOR_SPEC); return; case SDHCI_HOST_CONTROL2: new_val = readl(host->ioaddr + ESDHC_VENDOR_SPEC); if (val & SDHCI_CTRL_VDD_180) new_val |= ESDHC_VENDOR_SPEC_VSELECT; else new_val &= ~ESDHC_VENDOR_SPEC_VSELECT; writel(new_val, host->ioaddr + ESDHC_VENDOR_SPEC); if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING) { new_val = readl(host->ioaddr + ESDHC_MIX_CTRL); if (val & SDHCI_CTRL_TUNED_CLK) { new_val |= ESDHC_MIX_CTRL_SMPCLK_SEL; new_val |= ESDHC_MIX_CTRL_AUTO_TUNE_EN; } else { new_val &= ~ESDHC_MIX_CTRL_SMPCLK_SEL; new_val &= ~ESDHC_MIX_CTRL_AUTO_TUNE_EN; } writel(new_val , host->ioaddr + ESDHC_MIX_CTRL); } else if (imx_data->socdata->flags & ESDHC_FLAG_STD_TUNING) { u32 v = readl(host->ioaddr + SDHCI_AUTO_CMD_STATUS); u32 m = readl(host->ioaddr + ESDHC_MIX_CTRL); if (val & SDHCI_CTRL_TUNED_CLK) { v |= ESDHC_MIX_CTRL_SMPCLK_SEL; } else { v &= ~ESDHC_MIX_CTRL_SMPCLK_SEL; m &= ~ESDHC_MIX_CTRL_FBCLK_SEL; m &= ~ESDHC_MIX_CTRL_AUTO_TUNE_EN; } if (val & SDHCI_CTRL_EXEC_TUNING) { v |= ESDHC_MIX_CTRL_EXE_TUNE; m |= ESDHC_MIX_CTRL_FBCLK_SEL; m |= ESDHC_MIX_CTRL_AUTO_TUNE_EN; } else { v &= ~ESDHC_MIX_CTRL_EXE_TUNE; } writel(v, host->ioaddr + SDHCI_AUTO_CMD_STATUS); writel(m, host->ioaddr + ESDHC_MIX_CTRL); } return; case SDHCI_TRANSFER_MODE: if ((imx_data->socdata->flags & ESDHC_FLAG_MULTIBLK_NO_INT) && (host->cmd->opcode == SD_IO_RW_EXTENDED) && (host->cmd->data->blocks > 1) && (host->cmd->data->flags & MMC_DATA_READ)) { u32 v; v = readl(host->ioaddr + ESDHC_VENDOR_SPEC); v |= ESDHC_VENDOR_SPEC_SDIO_QUIRK; writel(v, host->ioaddr + ESDHC_VENDOR_SPEC); } if (esdhc_is_usdhc(imx_data)) { u32 wml; u32 m = readl(host->ioaddr + ESDHC_MIX_CTRL); /* Swap AC23 bit */ if (val & SDHCI_TRNS_AUTO_CMD23) { val &= ~SDHCI_TRNS_AUTO_CMD23; val |= ESDHC_MIX_CTRL_AC23EN; } m = val | (m & ~ESDHC_MIX_CTRL_SDHCI_MASK); writel(m, host->ioaddr + ESDHC_MIX_CTRL); /* Set watermark levels for PIO access to maximum value * (128 words) to accommodate full 512 bytes buffer. * For DMA access restore the levels to default value. */ m = readl(host->ioaddr + ESDHC_WTMK_LVL); if (val & SDHCI_TRNS_DMA) wml = ESDHC_WTMK_LVL_WML_VAL_DEF; else wml = ESDHC_WTMK_LVL_WML_VAL_MAX; m &= ~(ESDHC_WTMK_LVL_RD_WML_MASK | ESDHC_WTMK_LVL_WR_WML_MASK); m |= (wml << ESDHC_WTMK_LVL_RD_WML_SHIFT) | (wml << ESDHC_WTMK_LVL_WR_WML_SHIFT); writel(m, host->ioaddr + ESDHC_WTMK_LVL); } else { /* * Postpone this write, we must do it together with a * command write that is down below. */ imx_data->scratchpad = val; } return; case SDHCI_COMMAND: if (host->cmd->opcode == MMC_STOP_TRANSMISSION) val |= SDHCI_CMD_ABORTCMD; if ((host->cmd->opcode == MMC_SET_BLOCK_COUNT) && (imx_data->socdata->flags & ESDHC_FLAG_MULTIBLK_NO_INT)) imx_data->multiblock_status = MULTIBLK_IN_PROCESS; if (esdhc_is_usdhc(imx_data)) writel(val << 16, host->ioaddr + SDHCI_TRANSFER_MODE); else writel(val << 16 | imx_data->scratchpad, host->ioaddr + SDHCI_TRANSFER_MODE); return; case SDHCI_BLOCK_SIZE: val &= ~SDHCI_MAKE_BLKSZ(0x7, 0); break; } esdhc_clrset_le(host, 0xffff, val, reg); } static u8 esdhc_readb_le(struct sdhci_host *host, int reg) { u8 ret; u32 val; switch (reg) { case SDHCI_HOST_CONTROL: val = readl(host->ioaddr + reg); ret = val & SDHCI_CTRL_LED; ret |= (val >> 5) & SDHCI_CTRL_DMA_MASK; ret |= (val & ESDHC_CTRL_4BITBUS); ret |= (val & ESDHC_CTRL_8BITBUS) << 3; return ret; } return readb(host->ioaddr + reg); } static void esdhc_writeb_le(struct sdhci_host *host, u8 val, int reg) { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host); u32 new_val = 0; u32 mask; switch (reg) { case SDHCI_POWER_CONTROL: /* * FSL put some DMA bits here * If your board has a regulator, code should be here */ return; case SDHCI_HOST_CONTROL: /* FSL messed up here, so we need to manually compose it. */ new_val = val & SDHCI_CTRL_LED; /* ensure the endianness */ new_val |= ESDHC_HOST_CONTROL_LE; /* bits 8&9 are reserved on mx25 */ if (!is_imx25_esdhc(imx_data)) { /* DMA mode bits are shifted */ new_val |= (val & SDHCI_CTRL_DMA_MASK) << 5; } /* * Do not touch buswidth bits here. This is done in * esdhc_pltfm_bus_width. * Do not touch the D3CD bit either which is used for the * SDIO interrupt erratum workaround. */ mask = 0xffff & ~(ESDHC_CTRL_BUSWIDTH_MASK | ESDHC_CTRL_D3CD); esdhc_clrset_le(host, mask, new_val, reg); return; case SDHCI_SOFTWARE_RESET: if (val & SDHCI_RESET_DATA) new_val = readl(host->ioaddr + SDHCI_HOST_CONTROL); break; } esdhc_clrset_le(host, 0xff, val, reg); if (reg == SDHCI_SOFTWARE_RESET) { if (val & SDHCI_RESET_ALL) { /* * The esdhc has a design violation to SDHC spec which * tells that software reset should not affect card * detection circuit. But esdhc clears its SYSCTL * register bits [0..2] during the software reset. This * will stop those clocks that card detection circuit * relies on. To work around it, we turn the clocks on * back to keep card detection circuit functional. */ esdhc_clrset_le(host, 0x7, 0x7, ESDHC_SYSTEM_CONTROL); /* * The reset on usdhc fails to clear MIX_CTRL register. * Do it manually here. */ if (esdhc_is_usdhc(imx_data)) { /* * the tuning bits should be kept during reset */ new_val = readl(host->ioaddr + ESDHC_MIX_CTRL); writel(new_val & ESDHC_MIX_CTRL_TUNING_MASK, host->ioaddr + ESDHC_MIX_CTRL); imx_data->is_ddr = 0; } } else if (val & SDHCI_RESET_DATA) { /* * The eSDHC DAT line software reset clears at least the * data transfer width on i.MX25, so make sure that the * Host Control register is unaffected. */ esdhc_clrset_le(host, 0xff, new_val, SDHCI_HOST_CONTROL); } } } static unsigned int esdhc_pltfm_get_max_clock(struct sdhci_host *host) { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); return pltfm_host->clock; } static unsigned int esdhc_pltfm_get_min_clock(struct sdhci_host *host) { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); return pltfm_host->clock / 256 / 16; } static inline void esdhc_pltfm_set_clock(struct sdhci_host *host, unsigned int clock) { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host); unsigned int host_clock = pltfm_host->clock; int ddr_pre_div = imx_data->is_ddr ? 2 : 1; int pre_div = 1; int div = 1; u32 temp, val; if (esdhc_is_usdhc(imx_data)) { val = readl(host->ioaddr + ESDHC_VENDOR_SPEC); writel(val & ~ESDHC_VENDOR_SPEC_FRC_SDCLK_ON, host->ioaddr + ESDHC_VENDOR_SPEC); } if (clock == 0) { host->mmc->actual_clock = 0; return; } /* For i.MX53 eSDHCv3, SYSCTL.SDCLKFS may not be set to 0. */ if (is_imx53_esdhc(imx_data)) { /* * According to the i.MX53 reference manual, if DLLCTRL[10] can * be set, then the controller is eSDHCv3, else it is eSDHCv2. */ val = readl(host->ioaddr + ESDHC_DLL_CTRL); writel(val | BIT(10), host->ioaddr + ESDHC_DLL_CTRL); temp = readl(host->ioaddr + ESDHC_DLL_CTRL); writel(val, host->ioaddr + ESDHC_DLL_CTRL); if (temp & BIT(10)) pre_div = 2; } temp = sdhci_readl(host, ESDHC_SYSTEM_CONTROL); temp &= ~(ESDHC_CLOCK_IPGEN | ESDHC_CLOCK_HCKEN | ESDHC_CLOCK_PEREN | ESDHC_CLOCK_MASK); sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL); if (imx_data->socdata->flags & ESDHC_FLAG_ERR010450) { unsigned int max_clock; max_clock = imx_data->is_ddr ? 45000000 : 150000000; clock = min(clock, max_clock); } while (host_clock / (16 * pre_div * ddr_pre_div) > clock && pre_div < 256) pre_div *= 2; while (host_clock / (div * pre_div * ddr_pre_div) > clock && div < 16) div++; host->mmc->actual_clock = host_clock / (div * pre_div * ddr_pre_div); dev_dbg(mmc_dev(host->mmc), "desired SD clock: %d, actual: %d\n", clock, host->mmc->actual_clock); pre_div >>= 1; div--; temp = sdhci_readl(host, ESDHC_SYSTEM_CONTROL); temp |= (ESDHC_CLOCK_IPGEN | ESDHC_CLOCK_HCKEN | ESDHC_CLOCK_PEREN | (div << ESDHC_DIVIDER_SHIFT) | (pre_div << ESDHC_PREDIV_SHIFT)); sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL); if (esdhc_is_usdhc(imx_data)) { val = readl(host->ioaddr + ESDHC_VENDOR_SPEC); writel(val | ESDHC_VENDOR_SPEC_FRC_SDCLK_ON, host->ioaddr + ESDHC_VENDOR_SPEC); } mdelay(1); } static unsigned int esdhc_pltfm_get_ro(struct sdhci_host *host) { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host); struct esdhc_platform_data *boarddata = &imx_data->boarddata; switch (boarddata->wp_type) { case ESDHC_WP_GPIO: return mmc_gpio_get_ro(host->mmc); case ESDHC_WP_CONTROLLER: return !(readl(host->ioaddr + SDHCI_PRESENT_STATE) & SDHCI_WRITE_PROTECT); case ESDHC_WP_NONE: break; } return -ENOSYS; } static void esdhc_pltfm_set_bus_width(struct sdhci_host *host, int width) { u32 ctrl; switch (width) { case MMC_BUS_WIDTH_8: ctrl = ESDHC_CTRL_8BITBUS; break; case MMC_BUS_WIDTH_4: ctrl = ESDHC_CTRL_4BITBUS; break; default: ctrl = 0; break; } esdhc_clrset_le(host, ESDHC_CTRL_BUSWIDTH_MASK, ctrl, SDHCI_HOST_CONTROL); } static int usdhc_execute_tuning(struct mmc_host *mmc, u32 opcode) { struct sdhci_host *host = mmc_priv(mmc); /* * i.MX uSDHC internally already uses a fixed optimized timing for * DDR50, normally does not require tuning for DDR50 mode. */ if (host->timing == MMC_TIMING_UHS_DDR50) return 0; return sdhci_execute_tuning(mmc, opcode); } static void esdhc_prepare_tuning(struct sdhci_host *host, u32 val) { u32 reg; /* FIXME: delay a bit for card to be ready for next tuning due to errors */ mdelay(1); reg = readl(host->ioaddr + ESDHC_MIX_CTRL); reg |= ESDHC_MIX_CTRL_EXE_TUNE | ESDHC_MIX_CTRL_SMPCLK_SEL | ESDHC_MIX_CTRL_FBCLK_SEL; writel(reg, host->ioaddr + ESDHC_MIX_CTRL); writel(val << 8, host->ioaddr + ESDHC_TUNE_CTRL_STATUS); dev_dbg(mmc_dev(host->mmc), "tuning with delay 0x%x ESDHC_TUNE_CTRL_STATUS 0x%x\n", val, readl(host->ioaddr + ESDHC_TUNE_CTRL_STATUS)); } static void esdhc_post_tuning(struct sdhci_host *host) { u32 reg; reg = readl(host->ioaddr + ESDHC_MIX_CTRL); reg &= ~ESDHC_MIX_CTRL_EXE_TUNE; reg |= ESDHC_MIX_CTRL_AUTO_TUNE_EN; writel(reg, host->ioaddr + ESDHC_MIX_CTRL); } static int esdhc_executing_tuning(struct sdhci_host *host, u32 opcode) { int min, max, avg, ret; /* find the mininum delay first which can pass tuning */ min = ESDHC_TUNE_CTRL_MIN; while (min < ESDHC_TUNE_CTRL_MAX) { esdhc_prepare_tuning(host, min); if (!mmc_send_tuning(host->mmc, opcode, NULL)) break; min += ESDHC_TUNE_CTRL_STEP; } /* find the maxinum delay which can not pass tuning */ max = min + ESDHC_TUNE_CTRL_STEP; while (max < ESDHC_TUNE_CTRL_MAX) { esdhc_prepare_tuning(host, max); if (mmc_send_tuning(host->mmc, opcode, NULL)) { max -= ESDHC_TUNE_CTRL_STEP; break; } max += ESDHC_TUNE_CTRL_STEP; } /* use average delay to get the best timing */ avg = (min + max) / 2; esdhc_prepare_tuning(host, avg); ret = mmc_send_tuning(host->mmc, opcode, NULL); esdhc_post_tuning(host); dev_dbg(mmc_dev(host->mmc), "tuning %s at 0x%x ret %d\n", ret ? "failed" : "passed", avg, ret); return ret; } static void esdhc_hs400_enhanced_strobe(struct mmc_host *mmc, struct mmc_ios *ios) { struct sdhci_host *host = mmc_priv(mmc); u32 m; m = readl(host->ioaddr + ESDHC_MIX_CTRL); if (ios->enhanced_strobe) m |= ESDHC_MIX_CTRL_HS400_ES_EN; else m &= ~ESDHC_MIX_CTRL_HS400_ES_EN; writel(m, host->ioaddr + ESDHC_MIX_CTRL); } static int esdhc_change_pinstate(struct sdhci_host *host, unsigned int uhs) { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host); struct pinctrl_state *pinctrl; dev_dbg(mmc_dev(host->mmc), "change pinctrl state for uhs %d\n", uhs); if (IS_ERR(imx_data->pinctrl) || IS_ERR(imx_data->pins_default) || IS_ERR(imx_data->pins_100mhz) || IS_ERR(imx_data->pins_200mhz)) return -EINVAL; switch (uhs) { case MMC_TIMING_UHS_SDR50: case MMC_TIMING_UHS_DDR50: pinctrl = imx_data->pins_100mhz; break; case MMC_TIMING_UHS_SDR104: case MMC_TIMING_MMC_HS200: case MMC_TIMING_MMC_HS400: pinctrl = imx_data->pins_200mhz; break; default: /* back to default state for other legacy timing */ pinctrl = imx_data->pins_default; } return pinctrl_select_state(imx_data->pinctrl, pinctrl); } /* * For HS400 eMMC, there is a data_strobe line. This signal is generated * by the device and used for data output and CRC status response output * in HS400 mode. The frequency of this signal follows the frequency of * CLK generated by host. The host receives the data which is aligned to the * edge of data_strobe line. Due to the time delay between CLK line and * data_strobe line, if the delay time is larger than one clock cycle, * then CLK and data_strobe line will be misaligned, read error shows up. */ static void esdhc_set_strobe_dll(struct sdhci_host *host) { u32 v; /* disable clock before enabling strobe dll */ writel(readl(host->ioaddr + ESDHC_VENDOR_SPEC) & ~ESDHC_VENDOR_SPEC_FRC_SDCLK_ON, host->ioaddr + ESDHC_VENDOR_SPEC); /* force a reset on strobe dll */ writel(ESDHC_STROBE_DLL_CTRL_RESET, host->ioaddr + ESDHC_STROBE_DLL_CTRL); /* clear the reset bit on strobe dll before any setting */ writel(0, host->ioaddr + ESDHC_STROBE_DLL_CTRL); /* * enable strobe dll ctrl and adjust the delay target * for the uSDHC loopback read clock */ v = ESDHC_STROBE_DLL_CTRL_ENABLE | ESDHC_STROBE_DLL_CTRL_SLV_UPDATE_INT_DEFAULT | (7 << ESDHC_STROBE_DLL_CTRL_SLV_DLY_TARGET_SHIFT); writel(v, host->ioaddr + ESDHC_STROBE_DLL_CTRL); /* wait 5us to make sure strobe dll status register stable */ udelay(5); v = readl(host->ioaddr + ESDHC_STROBE_DLL_STATUS); if (!(v & ESDHC_STROBE_DLL_STS_REF_LOCK)) dev_warn(mmc_dev(host->mmc), "warning! HS400 strobe DLL status REF not lock!\n"); if (!(v & ESDHC_STROBE_DLL_STS_SLV_LOCK)) dev_warn(mmc_dev(host->mmc), "warning! HS400 strobe DLL status SLV not lock!\n"); } static void esdhc_reset_tuning(struct sdhci_host *host) { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host); u32 ctrl; /* Reset the tuning circuit */ if (esdhc_is_usdhc(imx_data)) { if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING) { ctrl = readl(host->ioaddr + ESDHC_MIX_CTRL); ctrl &= ~ESDHC_MIX_CTRL_SMPCLK_SEL; ctrl &= ~ESDHC_MIX_CTRL_FBCLK_SEL; writel(ctrl, host->ioaddr + ESDHC_MIX_CTRL); writel(0, host->ioaddr + ESDHC_TUNE_CTRL_STATUS); } else if (imx_data->socdata->flags & ESDHC_FLAG_STD_TUNING) { ctrl = readl(host->ioaddr + SDHCI_AUTO_CMD_STATUS); ctrl &= ~ESDHC_MIX_CTRL_SMPCLK_SEL; writel(ctrl, host->ioaddr + SDHCI_AUTO_CMD_STATUS); } } } static void esdhc_set_uhs_signaling(struct sdhci_host *host, unsigned timing) { u32 m; struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host); struct esdhc_platform_data *boarddata = &imx_data->boarddata; /* disable ddr mode and disable HS400 mode */ m = readl(host->ioaddr + ESDHC_MIX_CTRL); m &= ~(ESDHC_MIX_CTRL_DDREN | ESDHC_MIX_CTRL_HS400_EN); imx_data->is_ddr = 0; switch (timing) { case MMC_TIMING_UHS_SDR12: case MMC_TIMING_UHS_SDR25: case MMC_TIMING_UHS_SDR50: case MMC_TIMING_UHS_SDR104: case MMC_TIMING_MMC_HS: case MMC_TIMING_MMC_HS200: writel(m, host->ioaddr + ESDHC_MIX_CTRL); break; case MMC_TIMING_UHS_DDR50: case MMC_TIMING_MMC_DDR52: m |= ESDHC_MIX_CTRL_DDREN; writel(m, host->ioaddr + ESDHC_MIX_CTRL); imx_data->is_ddr = 1; if (boarddata->delay_line) { u32 v; v = boarddata->delay_line << ESDHC_DLL_OVERRIDE_VAL_SHIFT | (1 << ESDHC_DLL_OVERRIDE_EN_SHIFT); if (is_imx53_esdhc(imx_data)) v <<= 1; writel(v, host->ioaddr + ESDHC_DLL_CTRL); } break; case MMC_TIMING_MMC_HS400: m |= ESDHC_MIX_CTRL_DDREN | ESDHC_MIX_CTRL_HS400_EN; writel(m, host->ioaddr + ESDHC_MIX_CTRL); imx_data->is_ddr = 1; /* update clock after enable DDR for strobe DLL lock */ host->ops->set_clock(host, host->clock); esdhc_set_strobe_dll(host); break; case MMC_TIMING_LEGACY: default: esdhc_reset_tuning(host); break; } esdhc_change_pinstate(host, timing); } static void esdhc_reset(struct sdhci_host *host, u8 mask) { sdhci_reset(host, mask); sdhci_writel(host, host->ier, SDHCI_INT_ENABLE); sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE); } static unsigned int esdhc_get_max_timeout_count(struct sdhci_host *host) { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host); /* Doc Erratum: the uSDHC actual maximum timeout count is 1 << 29 */ return esdhc_is_usdhc(imx_data) ? 1 << 29 : 1 << 27; } static void esdhc_set_timeout(struct sdhci_host *host, struct mmc_command *cmd) { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host); /* use maximum timeout counter */ esdhc_clrset_le(host, ESDHC_SYS_CTRL_DTOCV_MASK, esdhc_is_usdhc(imx_data) ? 0xF : 0xE, SDHCI_TIMEOUT_CONTROL); } static u32 esdhc_cqhci_irq(struct sdhci_host *host, u32 intmask) { int cmd_error = 0; int data_error = 0; if (!sdhci_cqe_irq(host, intmask, &cmd_error, &data_error)) return intmask; cqhci_irq(host->mmc, intmask, cmd_error, data_error); return 0; } static struct sdhci_ops sdhci_esdhc_ops = { .read_l = esdhc_readl_le, .read_w = esdhc_readw_le, .read_b = esdhc_readb_le, .write_l = esdhc_writel_le, .write_w = esdhc_writew_le, .write_b = esdhc_writeb_le, .set_clock = esdhc_pltfm_set_clock, .get_max_clock = esdhc_pltfm_get_max_clock, .get_min_clock = esdhc_pltfm_get_min_clock, .get_max_timeout_count = esdhc_get_max_timeout_count, .get_ro = esdhc_pltfm_get_ro, .set_timeout = esdhc_set_timeout, .set_bus_width = esdhc_pltfm_set_bus_width, .set_uhs_signaling = esdhc_set_uhs_signaling, .reset = esdhc_reset, .irq = esdhc_cqhci_irq, }; static const struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = { .quirks = ESDHC_DEFAULT_QUIRKS | SDHCI_QUIRK_NO_HISPD_BIT | SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC | SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC | SDHCI_QUIRK_BROKEN_CARD_DETECTION, .ops = &sdhci_esdhc_ops, }; static void sdhci_esdhc_imx_hwinit(struct sdhci_host *host) { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host); int tmp; if (esdhc_is_usdhc(imx_data)) { /* * The imx6q ROM code will change the default watermark * level setting to something insane. Change it back here. */ writel(ESDHC_WTMK_DEFAULT_VAL, host->ioaddr + ESDHC_WTMK_LVL); /* * ROM code will change the bit burst_length_enable setting * to zero if this usdhc is chosen to boot system. Change * it back here, otherwise it will impact the performance a * lot. This bit is used to enable/disable the burst length * for the external AHB2AXI bridge. It's useful especially * for INCR transfer because without burst length indicator, * the AHB2AXI bridge does not know the burst length in * advance. And without burst length indicator, AHB INCR * transfer can only be converted to singles on the AXI side. */ writel(readl(host->ioaddr + SDHCI_HOST_CONTROL) | ESDHC_BURST_LEN_EN_INCR, host->ioaddr + SDHCI_HOST_CONTROL); /* * erratum ESDHC_FLAG_ERR004536 fix for MX6Q TO1.2 and MX6DL * TO1.1, it's harmless for MX6SL */ writel(readl(host->ioaddr + 0x6c) & ~BIT(7), host->ioaddr + 0x6c); /* disable DLL_CTRL delay line settings */ writel(0x0, host->ioaddr + ESDHC_DLL_CTRL); /* * For the case of command with busy, if set the bit * ESDHC_VEND_SPEC2_EN_BUSY_IRQ, USDHC will generate a * transfer complete interrupt when busy is deasserted. * When CQHCI use DCMD to send a CMD need R1b respons, * CQHCI require to set ESDHC_VEND_SPEC2_EN_BUSY_IRQ, * otherwise DCMD will always meet timeout waiting for * hardware interrupt issue. */ if (imx_data->socdata->flags & ESDHC_FLAG_CQHCI) { tmp = readl(host->ioaddr + ESDHC_VEND_SPEC2); tmp |= ESDHC_VEND_SPEC2_EN_BUSY_IRQ; writel(tmp, host->ioaddr + ESDHC_VEND_SPEC2); host->quirks &= ~SDHCI_QUIRK_NO_BUSY_IRQ; } if (imx_data->socdata->flags & ESDHC_FLAG_STD_TUNING) { tmp = readl(host->ioaddr + ESDHC_TUNING_CTRL); tmp |= ESDHC_STD_TUNING_EN | ESDHC_TUNING_START_TAP_DEFAULT; if (imx_data->boarddata.tuning_start_tap) { tmp &= ~ESDHC_TUNING_START_TAP_MASK; tmp |= imx_data->boarddata.tuning_start_tap; } if (imx_data->boarddata.tuning_step) { tmp &= ~ESDHC_TUNING_STEP_MASK; tmp |= imx_data->boarddata.tuning_step << ESDHC_TUNING_STEP_SHIFT; } writel(tmp, host->ioaddr + ESDHC_TUNING_CTRL); } else if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING) { /* * ESDHC_STD_TUNING_EN may be configed in bootloader * or ROM code, so clear this bit here to make sure * the manual tuning can work. */ tmp = readl(host->ioaddr + ESDHC_TUNING_CTRL); tmp &= ~ESDHC_STD_TUNING_EN; writel(tmp, host->ioaddr + ESDHC_TUNING_CTRL); } } } static void esdhc_cqe_enable(struct mmc_host *mmc) { struct sdhci_host *host = mmc_priv(mmc); struct cqhci_host *cq_host = mmc->cqe_private; u32 reg; u16 mode; int count = 10; /* * CQE gets stuck if it sees Buffer Read Enable bit set, which can be * the case after tuning, so ensure the buffer is drained. */ reg = sdhci_readl(host, SDHCI_PRESENT_STATE); while (reg & SDHCI_DATA_AVAILABLE) { sdhci_readl(host, SDHCI_BUFFER); reg = sdhci_readl(host, SDHCI_PRESENT_STATE); if (count-- == 0) { dev_warn(mmc_dev(host->mmc), "CQE may get stuck because the Buffer Read Enable bit is set\n"); break; } mdelay(1); } /* * Runtime resume will reset the entire host controller, which * will also clear the DMAEN/BCEN of register ESDHC_MIX_CTRL. * Here set DMAEN and BCEN when enable CMDQ. */ mode = sdhci_readw(host, SDHCI_TRANSFER_MODE); if (host->flags & SDHCI_REQ_USE_DMA) mode |= SDHCI_TRNS_DMA; if (!(host->quirks2 & SDHCI_QUIRK2_SUPPORT_SINGLE)) mode |= SDHCI_TRNS_BLK_CNT_EN; sdhci_writew(host, mode, SDHCI_TRANSFER_MODE); /* * Though Runtime resume reset the entire host controller, * but do not impact the CQHCI side, need to clear the * HALT bit, avoid CQHCI stuck in the first request when * system resume back. */ cqhci_writel(cq_host, 0, CQHCI_CTL); if (cqhci_readl(cq_host, CQHCI_CTL) && CQHCI_HALT) dev_err(mmc_dev(host->mmc), "failed to exit halt state when enable CQE\n"); sdhci_cqe_enable(mmc); } static void esdhc_sdhci_dumpregs(struct mmc_host *mmc) { sdhci_dumpregs(mmc_priv(mmc)); } static const struct cqhci_host_ops esdhc_cqhci_ops = { .enable = esdhc_cqe_enable, .disable = sdhci_cqe_disable, .dumpregs = esdhc_sdhci_dumpregs, }; #ifdef CONFIG_OF static int sdhci_esdhc_imx_probe_dt(struct platform_device *pdev, struct sdhci_host *host, struct pltfm_imx_data *imx_data) { struct device_node *np = pdev->dev.of_node; struct esdhc_platform_data *boarddata = &imx_data->boarddata; int ret; if (of_get_property(np, "fsl,wp-controller", NULL)) boarddata->wp_type = ESDHC_WP_CONTROLLER; /* * If we have this property, then activate WP check. * Retrieveing and requesting the actual WP GPIO will happen * in the call to mmc_of_parse(). */ if (of_property_read_bool(np, "wp-gpios")) boarddata->wp_type = ESDHC_WP_GPIO; of_property_read_u32(np, "fsl,tuning-step", &boarddata->tuning_step); of_property_read_u32(np, "fsl,tuning-start-tap", &boarddata->tuning_start_tap); if (of_find_property(np, "no-1-8-v", NULL)) host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V; if (of_property_read_u32(np, "fsl,delay-line", &boarddata->delay_line)) boarddata->delay_line = 0; mmc_of_parse_voltage(np, &host->ocr_mask); if (esdhc_is_usdhc(imx_data) && !IS_ERR(imx_data->pins_default)) { imx_data->pins_100mhz = pinctrl_lookup_state(imx_data->pinctrl, ESDHC_PINCTRL_STATE_100MHZ); imx_data->pins_200mhz = pinctrl_lookup_state(imx_data->pinctrl, ESDHC_PINCTRL_STATE_200MHZ); } /* call to generic mmc_of_parse to support additional capabilities */ ret = mmc_of_parse(host->mmc); if (ret) return ret; if (mmc_gpio_get_cd(host->mmc) >= 0) host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION; return 0; } #else static inline int sdhci_esdhc_imx_probe_dt(struct platform_device *pdev, struct sdhci_host *host, struct pltfm_imx_data *imx_data) { return -ENODEV; } #endif static int sdhci_esdhc_imx_probe_nondt(struct platform_device *pdev, struct sdhci_host *host, struct pltfm_imx_data *imx_data) { struct esdhc_platform_data *boarddata = &imx_data->boarddata; int err; if (!host->mmc->parent->platform_data) { dev_err(mmc_dev(host->mmc), "no board data!\n"); return -EINVAL; } imx_data->boarddata = *((struct esdhc_platform_data *) host->mmc->parent->platform_data); /* write_protect */ if (boarddata->wp_type == ESDHC_WP_GPIO) { err = mmc_gpiod_request_ro(host->mmc, "wp", 0, 0, NULL); if (err) { dev_err(mmc_dev(host->mmc), "failed to request write-protect gpio!\n"); return err; } host->mmc->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH; } /* card_detect */ switch (boarddata->cd_type) { case ESDHC_CD_GPIO: err = mmc_gpiod_request_cd(host->mmc, "cd", 0, false, 0, NULL); if (err) { dev_err(mmc_dev(host->mmc), "failed to request card-detect gpio!\n"); return err; } /* fall through */ case ESDHC_CD_CONTROLLER: /* we have a working card_detect back */ host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION; break; case ESDHC_CD_PERMANENT: host->mmc->caps |= MMC_CAP_NONREMOVABLE; break; case ESDHC_CD_NONE: break; } switch (boarddata->max_bus_width) { case 8: host->mmc->caps |= MMC_CAP_8_BIT_DATA | MMC_CAP_4_BIT_DATA; break; case 4: host->mmc->caps |= MMC_CAP_4_BIT_DATA; break; case 1: default: host->quirks |= SDHCI_QUIRK_FORCE_1_BIT_DATA; break; } return 0; } static int sdhci_esdhc_imx_probe(struct platform_device *pdev) { const struct of_device_id *of_id = of_match_device(imx_esdhc_dt_ids, &pdev->dev); struct sdhci_pltfm_host *pltfm_host; struct sdhci_host *host; struct cqhci_host *cq_host; int err; struct pltfm_imx_data *imx_data; host = sdhci_pltfm_init(pdev, &sdhci_esdhc_imx_pdata, sizeof(*imx_data)); if (IS_ERR(host)) return PTR_ERR(host); pltfm_host = sdhci_priv(host); imx_data = sdhci_pltfm_priv(pltfm_host); imx_data->socdata = of_id ? of_id->data : (struct esdhc_soc_data *) pdev->id_entry->driver_data; if (imx_data->socdata->flags & ESDHC_FLAG_PMQOS) pm_qos_add_request(&imx_data->pm_qos_req, PM_QOS_CPU_DMA_LATENCY, 0); imx_data->clk_ipg = devm_clk_get(&pdev->dev, "ipg"); if (IS_ERR(imx_data->clk_ipg)) { err = PTR_ERR(imx_data->clk_ipg); goto free_sdhci; } imx_data->clk_ahb = devm_clk_get(&pdev->dev, "ahb"); if (IS_ERR(imx_data->clk_ahb)) { err = PTR_ERR(imx_data->clk_ahb); goto free_sdhci; } imx_data->clk_per = devm_clk_get(&pdev->dev, "per"); if (IS_ERR(imx_data->clk_per)) { err = PTR_ERR(imx_data->clk_per); goto free_sdhci; } pltfm_host->clk = imx_data->clk_per; pltfm_host->clock = clk_get_rate(pltfm_host->clk); err = clk_prepare_enable(imx_data->clk_per); if (err) goto free_sdhci; err = clk_prepare_enable(imx_data->clk_ipg); if (err) goto disable_per_clk; err = clk_prepare_enable(imx_data->clk_ahb); if (err) goto disable_ipg_clk; imx_data->pinctrl = devm_pinctrl_get(&pdev->dev); if (IS_ERR(imx_data->pinctrl)) { err = PTR_ERR(imx_data->pinctrl); goto disable_ahb_clk; } imx_data->pins_default = pinctrl_lookup_state(imx_data->pinctrl, PINCTRL_STATE_DEFAULT); if (IS_ERR(imx_data->pins_default)) dev_warn(mmc_dev(host->mmc), "could not get default state\n"); if (esdhc_is_usdhc(imx_data)) { host->quirks2 |= SDHCI_QUIRK2_PRESET_VALUE_BROKEN; host->mmc->caps |= MMC_CAP_1_8V_DDR | MMC_CAP_3_3V_DDR; if (!(imx_data->socdata->flags & ESDHC_FLAG_HS200)) host->quirks2 |= SDHCI_QUIRK2_BROKEN_HS200; /* clear tuning bits in case ROM has set it already */ writel(0x0, host->ioaddr + ESDHC_MIX_CTRL); writel(0x0, host->ioaddr + SDHCI_AUTO_CMD_STATUS); writel(0x0, host->ioaddr + ESDHC_TUNE_CTRL_STATUS); /* * Link usdhc specific mmc_host_ops execute_tuning function, * to replace the standard one in sdhci_ops. */ host->mmc_host_ops.execute_tuning = usdhc_execute_tuning; } if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING) sdhci_esdhc_ops.platform_execute_tuning = esdhc_executing_tuning; if (imx_data->socdata->flags & ESDHC_FLAG_ERR004536) host->quirks |= SDHCI_QUIRK_BROKEN_ADMA; if (imx_data->socdata->flags & ESDHC_FLAG_HS400) host->quirks2 |= SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400; if (imx_data->socdata->flags & ESDHC_FLAG_HS400_ES) { host->mmc->caps2 |= MMC_CAP2_HS400_ES; host->mmc_host_ops.hs400_enhanced_strobe = esdhc_hs400_enhanced_strobe; } if (imx_data->socdata->flags & ESDHC_FLAG_CQHCI) { host->mmc->caps2 |= MMC_CAP2_CQE | MMC_CAP2_CQE_DCMD; cq_host = devm_kzalloc(&pdev->dev, sizeof(*cq_host), GFP_KERNEL); if (!cq_host) { err = -ENOMEM; goto disable_ahb_clk; } cq_host->mmio = host->ioaddr + ESDHC_CQHCI_ADDR_OFFSET; cq_host->ops = &esdhc_cqhci_ops; err = cqhci_init(cq_host, host->mmc, false); if (err) goto disable_ahb_clk; } if (of_id) err = sdhci_esdhc_imx_probe_dt(pdev, host, imx_data); else err = sdhci_esdhc_imx_probe_nondt(pdev, host, imx_data); if (err) goto disable_ahb_clk; host->tuning_delay = 1; sdhci_esdhc_imx_hwinit(host); err = sdhci_add_host(host); if (err) goto disable_ahb_clk; pm_runtime_set_active(&pdev->dev); pm_runtime_set_autosuspend_delay(&pdev->dev, 50); pm_runtime_use_autosuspend(&pdev->dev); pm_suspend_ignore_children(&pdev->dev, 1); pm_runtime_enable(&pdev->dev); return 0; disable_ahb_clk: clk_disable_unprepare(imx_data->clk_ahb); disable_ipg_clk: clk_disable_unprepare(imx_data->clk_ipg); disable_per_clk: clk_disable_unprepare(imx_data->clk_per); free_sdhci: if (imx_data->socdata->flags & ESDHC_FLAG_PMQOS) pm_qos_remove_request(&imx_data->pm_qos_req); sdhci_pltfm_free(pdev); return err; } static int sdhci_esdhc_imx_remove(struct platform_device *pdev) { struct sdhci_host *host = platform_get_drvdata(pdev); struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host); int dead = (readl(host->ioaddr + SDHCI_INT_STATUS) == 0xffffffff); pm_runtime_get_sync(&pdev->dev); pm_runtime_disable(&pdev->dev); pm_runtime_put_noidle(&pdev->dev); sdhci_remove_host(host, dead); clk_disable_unprepare(imx_data->clk_per); clk_disable_unprepare(imx_data->clk_ipg); clk_disable_unprepare(imx_data->clk_ahb); if (imx_data->socdata->flags & ESDHC_FLAG_PMQOS) pm_qos_remove_request(&imx_data->pm_qos_req); sdhci_pltfm_free(pdev); return 0; } #ifdef CONFIG_PM_SLEEP static int sdhci_esdhc_suspend(struct device *dev) { struct sdhci_host *host = dev_get_drvdata(dev); int ret; if (host->mmc->caps2 & MMC_CAP2_CQE) { ret = cqhci_suspend(host->mmc); if (ret) return ret; } if (host->tuning_mode != SDHCI_TUNING_MODE_3) mmc_retune_needed(host->mmc); return sdhci_suspend_host(host); } static int sdhci_esdhc_resume(struct device *dev) { struct sdhci_host *host = dev_get_drvdata(dev); int ret; /* re-initialize hw state in case it's lost in low power mode */ sdhci_esdhc_imx_hwinit(host); ret = sdhci_resume_host(host); if (ret) return ret; if (host->mmc->caps2 & MMC_CAP2_CQE) ret = cqhci_resume(host->mmc); return ret; } #endif #ifdef CONFIG_PM static int sdhci_esdhc_runtime_suspend(struct device *dev) { struct sdhci_host *host = dev_get_drvdata(dev); struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host); int ret; if (host->mmc->caps2 & MMC_CAP2_CQE) { ret = cqhci_suspend(host->mmc); if (ret) return ret; } ret = sdhci_runtime_suspend_host(host); if (ret) return ret; if (host->tuning_mode != SDHCI_TUNING_MODE_3) mmc_retune_needed(host->mmc); imx_data->actual_clock = host->mmc->actual_clock; esdhc_pltfm_set_clock(host, 0); clk_disable_unprepare(imx_data->clk_per); clk_disable_unprepare(imx_data->clk_ipg); clk_disable_unprepare(imx_data->clk_ahb); if (imx_data->socdata->flags & ESDHC_FLAG_PMQOS) pm_qos_remove_request(&imx_data->pm_qos_req); return ret; } static int sdhci_esdhc_runtime_resume(struct device *dev) { struct sdhci_host *host = dev_get_drvdata(dev); struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host); int err; if (imx_data->socdata->flags & ESDHC_FLAG_PMQOS) pm_qos_add_request(&imx_data->pm_qos_req, PM_QOS_CPU_DMA_LATENCY, 0); err = clk_prepare_enable(imx_data->clk_ahb); if (err) goto remove_pm_qos_request; err = clk_prepare_enable(imx_data->clk_per); if (err) goto disable_ahb_clk; err = clk_prepare_enable(imx_data->clk_ipg); if (err) goto disable_per_clk; esdhc_pltfm_set_clock(host, imx_data->actual_clock); err = sdhci_runtime_resume_host(host, 0); if (err) goto disable_ipg_clk; if (host->mmc->caps2 & MMC_CAP2_CQE) err = cqhci_resume(host->mmc); return err; disable_ipg_clk: clk_disable_unprepare(imx_data->clk_ipg); disable_per_clk: clk_disable_unprepare(imx_data->clk_per); disable_ahb_clk: clk_disable_unprepare(imx_data->clk_ahb); remove_pm_qos_request: if (imx_data->socdata->flags & ESDHC_FLAG_PMQOS) pm_qos_remove_request(&imx_data->pm_qos_req); return err; } #endif static const struct dev_pm_ops sdhci_esdhc_pmops = { SET_SYSTEM_SLEEP_PM_OPS(sdhci_esdhc_suspend, sdhci_esdhc_resume) SET_RUNTIME_PM_OPS(sdhci_esdhc_runtime_suspend, sdhci_esdhc_runtime_resume, NULL) }; static struct platform_driver sdhci_esdhc_imx_driver = { .driver = { .name = "sdhci-esdhc-imx", .of_match_table = imx_esdhc_dt_ids, .pm = &sdhci_esdhc_pmops, }, .id_table = imx_esdhc_devtype, .probe = sdhci_esdhc_imx_probe, .remove = sdhci_esdhc_imx_remove, }; module_platform_driver(sdhci_esdhc_imx_driver); MODULE_DESCRIPTION("SDHCI driver for Freescale i.MX eSDHC"); MODULE_AUTHOR("Wolfram Sang <kernel@pengutronix.de>"); MODULE_LICENSE("GPL v2");
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with Cregit http://github.com/cregit/cregit
Version 2.0-RC1