| /* |
| * 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> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License. |
| */ |
| |
| #include <linux/io.h> |
| #include <linux/delay.h> |
| #include <linux/err.h> |
| #include <linux/clk.h> |
| #include <linux/gpio.h> |
| #include <linux/module.h> |
| #include <linux/slab.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/of_gpio.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" |
| |
| #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_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) |
| /* 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_STATUS 0x74 |
| #define ESDHC_STROBE_DLL_STS_REF_LOCK (1 << 1) |
| #define ESDHC_STROBE_DLL_STS_SLV_LOCK 0x1 |
| |
| #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 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) |
| |
| /* A clock frequency higher than this rate requires strobe dll control */ |
| #define ESDHC_STROBE_DLL_CLK_FREQ 100000000 |
| |
| struct esdhc_soc_data { |
| u32 flags; |
| }; |
| |
| static struct esdhc_soc_data esdhc_imx25_data = { |
| .flags = ESDHC_FLAG_ERR004536, |
| }; |
| |
| static struct esdhc_soc_data esdhc_imx35_data = { |
| .flags = ESDHC_FLAG_ERR004536, |
| }; |
| |
| static struct esdhc_soc_data esdhc_imx51_data = { |
| .flags = 0, |
| }; |
| |
| static struct esdhc_soc_data esdhc_imx53_data = { |
| .flags = ESDHC_FLAG_MULTIBLK_NO_INT, |
| }; |
| |
| static struct esdhc_soc_data usdhc_imx6q_data = { |
| .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_MAN_TUNING, |
| }; |
| |
| static 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 struct esdhc_soc_data usdhc_imx6sx_data = { |
| .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING |
| | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200, |
| }; |
| |
| static 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, |
| }; |
| |
| 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; |
| }; |
| |
| 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,imx7d-usdhc", .data = &usdhc_imx7d_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; |
| } |
| } |
| |
| 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_ACMD12_ERR); |
| } |
| |
| 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_ACMD12_ERR); |
| 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_ACMD12_ERR); |
| 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 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); |
| } 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 (clock == 0) { |
| host->mmc->actual_clock = 0; |
| |
| 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); |
| } |
| 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); |
| |
| 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 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 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. |
| * So when the CLK is higher than 100MHz, each clock cycle is short enough, |
| * host should configure the delay target. |
| */ |
| static void esdhc_set_strobe_dll(struct sdhci_host *host) |
| { |
| u32 v; |
| |
| if (host->mmc->actual_clock > ESDHC_STROBE_DLL_CLK_FREQ) { |
| /* 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); |
| /* |
| * enable strobe dll ctrl and adjust the delay target |
| * for the uSDHC loopback read clock |
| */ |
| v = ESDHC_STROBE_DLL_CTRL_ENABLE | |
| (7 << ESDHC_STROBE_DLL_CTRL_SLV_DLY_TARGET_SHIFT); |
| writel(v, host->ioaddr + ESDHC_STROBE_DLL_CTRL); |
| /* wait 1us to make sure strobe dll status register stable */ |
| udelay(1); |
| 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_ACMD12_ERR); |
| ctrl &= ~ESDHC_MIX_CTRL_SMPCLK_SEL; |
| writel(ctrl, host->ioaddr + SDHCI_ACMD12_ERR); |
| } |
| } |
| } |
| |
| 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_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 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, |
| }; |
| |
| 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); |
| |
| 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); |
| } |
| } |
| } |
| |
| #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; |
| |
| boarddata->wp_gpio = of_get_named_gpio(np, "wp-gpios", 0); |
| if (gpio_is_valid(boarddata->wp_gpio)) |
| 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)) |
| boarddata->support_vsel = false; |
| else |
| boarddata->support_vsel = true; |
| |
| if (of_property_read_u32(np, "fsl,delay-line", &boarddata->delay_line)) |
| boarddata->delay_line = 0; |
| |
| mmc_of_parse_voltage(np, &host->ocr_mask); |
| |
| /* sdr50 and sdr104 need work on 1.8v signal voltage */ |
| if ((boarddata->support_vsel) && 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); |
| if (IS_ERR(imx_data->pins_100mhz) || |
| IS_ERR(imx_data->pins_200mhz)) { |
| dev_warn(mmc_dev(host->mmc), |
| "could not get ultra high speed state, work on normal mode\n"); |
| /* |
| * fall back to not supporting uhs by specifying no |
| * 1.8v quirk |
| */ |
| host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V; |
| } |
| } else { |
| host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V; |
| } |
| |
| /* 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_gpio_request_ro(host->mmc, boarddata->wp_gpio); |
| 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_gpio_request_cd(host->mmc, boarddata->cd_gpio, 0); |
| 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; |
| 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; |
| |
| 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; |
| 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_ACMD12_ERR); |
| writel(0x0, host->ioaddr + ESDHC_TUNE_CTRL_STATUS); |
| } |
| |
| 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 (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; |
| |
| 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: |
| 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); |
| |
| 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); |
| |
| 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); |
| |
| /* re-initialize hw state in case it's lost in low power mode */ |
| sdhci_esdhc_imx_hwinit(host); |
| |
| return sdhci_resume_host(host); |
| } |
| #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; |
| |
| ret = sdhci_runtime_suspend_host(host); |
| if (ret) |
| return ret; |
| |
| if (host->tuning_mode != SDHCI_TUNING_MODE_3) |
| mmc_retune_needed(host->mmc); |
| |
| if (!sdhci_sdio_irq_enabled(host)) { |
| 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); |
| |
| 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; |
| |
| err = clk_prepare_enable(imx_data->clk_ahb); |
| if (err) |
| return err; |
| |
| if (!sdhci_sdio_irq_enabled(host)) { |
| 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); |
| if (err) |
| goto disable_ipg_clk; |
| |
| return 0; |
| |
| disable_ipg_clk: |
| if (!sdhci_sdio_irq_enabled(host)) |
| clk_disable_unprepare(imx_data->clk_ipg); |
| disable_per_clk: |
| if (!sdhci_sdio_irq_enabled(host)) |
| clk_disable_unprepare(imx_data->clk_per); |
| disable_ahb_clk: |
| clk_disable_unprepare(imx_data->clk_ahb); |
| 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"); |