1315 lines
38 KiB
C
1315 lines
38 KiB
C
/*
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* Freescale eSDHC i.MX controller driver for the platform bus.
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*
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* derived from the OF-version.
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*
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* Copyright (c) 2010 Pengutronix e.K.
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* Author: Wolfram Sang <kernel@pengutronix.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License.
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*/
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#include <linux/io.h>
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#include <linux/delay.h>
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#include <linux/err.h>
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#include <linux/clk.h>
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#include <linux/gpio.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/mmc/host.h>
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#include <linux/mmc/mmc.h>
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#include <linux/mmc/sdio.h>
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#include <linux/mmc/slot-gpio.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/of_gpio.h>
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#include <linux/pinctrl/consumer.h>
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#include <linux/platform_data/mmc-esdhc-imx.h>
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#include <linux/pm_runtime.h>
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#include "sdhci-pltfm.h"
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#include "sdhci-esdhc.h"
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#define ESDHC_CTRL_D3CD 0x08
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#define ESDHC_BURST_LEN_EN_INCR (1 << 27)
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/* VENDOR SPEC register */
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#define ESDHC_VENDOR_SPEC 0xc0
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#define ESDHC_VENDOR_SPEC_SDIO_QUIRK (1 << 1)
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#define ESDHC_VENDOR_SPEC_VSELECT (1 << 1)
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#define ESDHC_VENDOR_SPEC_FRC_SDCLK_ON (1 << 8)
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#define ESDHC_WTMK_LVL 0x44
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#define ESDHC_MIX_CTRL 0x48
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#define ESDHC_MIX_CTRL_DDREN (1 << 3)
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#define ESDHC_MIX_CTRL_AC23EN (1 << 7)
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#define ESDHC_MIX_CTRL_EXE_TUNE (1 << 22)
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#define ESDHC_MIX_CTRL_SMPCLK_SEL (1 << 23)
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#define ESDHC_MIX_CTRL_FBCLK_SEL (1 << 25)
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#define ESDHC_MIX_CTRL_HS400_EN (1 << 26)
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/* Bits 3 and 6 are not SDHCI standard definitions */
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#define ESDHC_MIX_CTRL_SDHCI_MASK 0xb7
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/* Tuning bits */
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#define ESDHC_MIX_CTRL_TUNING_MASK 0x03c00000
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/* dll control register */
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#define ESDHC_DLL_CTRL 0x60
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#define ESDHC_DLL_OVERRIDE_VAL_SHIFT 9
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#define ESDHC_DLL_OVERRIDE_EN_SHIFT 8
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/* tune control register */
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#define ESDHC_TUNE_CTRL_STATUS 0x68
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#define ESDHC_TUNE_CTRL_STEP 1
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#define ESDHC_TUNE_CTRL_MIN 0
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#define ESDHC_TUNE_CTRL_MAX ((1 << 7) - 1)
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/* strobe dll register */
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#define ESDHC_STROBE_DLL_CTRL 0x70
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#define ESDHC_STROBE_DLL_CTRL_ENABLE (1 << 0)
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#define ESDHC_STROBE_DLL_CTRL_RESET (1 << 1)
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#define ESDHC_STROBE_DLL_CTRL_SLV_DLY_TARGET_SHIFT 3
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#define ESDHC_STROBE_DLL_STATUS 0x74
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#define ESDHC_STROBE_DLL_STS_REF_LOCK (1 << 1)
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#define ESDHC_STROBE_DLL_STS_SLV_LOCK 0x1
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#define ESDHC_TUNING_CTRL 0xcc
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#define ESDHC_STD_TUNING_EN (1 << 24)
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/* NOTE: the minimum valid tuning start tap for mx6sl is 1 */
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#define ESDHC_TUNING_START_TAP 0x1
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#define ESDHC_TUNING_STEP_MASK 0x00070000
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#define ESDHC_TUNING_STEP_SHIFT 16
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/* pinctrl state */
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#define ESDHC_PINCTRL_STATE_100MHZ "state_100mhz"
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#define ESDHC_PINCTRL_STATE_200MHZ "state_200mhz"
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/*
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* Our interpretation of the SDHCI_HOST_CONTROL register
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*/
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#define ESDHC_CTRL_4BITBUS (0x1 << 1)
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#define ESDHC_CTRL_8BITBUS (0x2 << 1)
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#define ESDHC_CTRL_BUSWIDTH_MASK (0x3 << 1)
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/*
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* There is an INT DMA ERR mis-match between eSDHC and STD SDHC SPEC:
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* Bit25 is used in STD SPEC, and is reserved in fsl eSDHC design,
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* but bit28 is used as the INT DMA ERR in fsl eSDHC design.
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* Define this macro DMA error INT for fsl eSDHC
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*/
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#define ESDHC_INT_VENDOR_SPEC_DMA_ERR (1 << 28)
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/*
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* The CMDTYPE of the CMD register (offset 0xE) should be set to
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* "11" when the STOP CMD12 is issued on imx53 to abort one
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* open ended multi-blk IO. Otherwise the TC INT wouldn't
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* be generated.
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* In exact block transfer, the controller doesn't complete the
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* operations automatically as required at the end of the
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* transfer and remains on hold if the abort command is not sent.
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* As a result, the TC flag is not asserted and SW received timeout
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* exeception. Bit1 of Vendor Spec registor is used to fix it.
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*/
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#define ESDHC_FLAG_MULTIBLK_NO_INT BIT(1)
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/*
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* The flag enables the workaround for ESDHC errata ENGcm07207 which
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* affects i.MX25 and i.MX35.
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*/
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#define ESDHC_FLAG_ENGCM07207 BIT(2)
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/*
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* The flag tells that the ESDHC controller is an USDHC block that is
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* integrated on the i.MX6 series.
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*/
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#define ESDHC_FLAG_USDHC BIT(3)
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/* The IP supports manual tuning process */
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#define ESDHC_FLAG_MAN_TUNING BIT(4)
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/* The IP supports standard tuning process */
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#define ESDHC_FLAG_STD_TUNING BIT(5)
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/* The IP has SDHCI_CAPABILITIES_1 register */
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#define ESDHC_FLAG_HAVE_CAP1 BIT(6)
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/*
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* The IP has errata ERR004536
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* uSDHC: ADMA Length Mismatch Error occurs if the AHB read access is slow,
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* when reading data from the card
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*/
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#define ESDHC_FLAG_ERR004536 BIT(7)
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/* The IP supports HS200 mode */
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#define ESDHC_FLAG_HS200 BIT(8)
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/* The IP supports HS400 mode */
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#define ESDHC_FLAG_HS400 BIT(9)
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/* A higher clock ferquency than this rate requires strobell dll control */
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#define ESDHC_STROBE_DLL_CLK_FREQ 100000000
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struct esdhc_soc_data {
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u32 flags;
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};
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static struct esdhc_soc_data esdhc_imx25_data = {
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.flags = ESDHC_FLAG_ENGCM07207,
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};
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static struct esdhc_soc_data esdhc_imx35_data = {
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.flags = ESDHC_FLAG_ENGCM07207,
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};
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static struct esdhc_soc_data esdhc_imx51_data = {
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.flags = 0,
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};
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static struct esdhc_soc_data esdhc_imx53_data = {
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.flags = ESDHC_FLAG_MULTIBLK_NO_INT,
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};
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static struct esdhc_soc_data usdhc_imx6q_data = {
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.flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_MAN_TUNING,
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};
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static struct esdhc_soc_data usdhc_imx6sl_data = {
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.flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING
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| ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_ERR004536
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| ESDHC_FLAG_HS200,
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};
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static struct esdhc_soc_data usdhc_imx6sx_data = {
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.flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING
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| ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200,
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};
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static struct esdhc_soc_data usdhc_imx7d_data = {
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.flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING
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| ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200
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| ESDHC_FLAG_HS400,
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};
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struct pltfm_imx_data {
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u32 scratchpad;
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struct pinctrl *pinctrl;
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struct pinctrl_state *pins_default;
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struct pinctrl_state *pins_100mhz;
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struct pinctrl_state *pins_200mhz;
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const struct esdhc_soc_data *socdata;
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struct esdhc_platform_data boarddata;
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struct clk *clk_ipg;
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struct clk *clk_ahb;
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struct clk *clk_per;
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enum {
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NO_CMD_PENDING, /* no multiblock command pending*/
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MULTIBLK_IN_PROCESS, /* exact multiblock cmd in process */
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WAIT_FOR_INT, /* sent CMD12, waiting for response INT */
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} multiblock_status;
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u32 is_ddr;
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};
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static const struct platform_device_id imx_esdhc_devtype[] = {
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{
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.name = "sdhci-esdhc-imx25",
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.driver_data = (kernel_ulong_t) &esdhc_imx25_data,
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}, {
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.name = "sdhci-esdhc-imx35",
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.driver_data = (kernel_ulong_t) &esdhc_imx35_data,
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}, {
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.name = "sdhci-esdhc-imx51",
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.driver_data = (kernel_ulong_t) &esdhc_imx51_data,
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}, {
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/* sentinel */
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}
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};
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MODULE_DEVICE_TABLE(platform, imx_esdhc_devtype);
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static const struct of_device_id imx_esdhc_dt_ids[] = {
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{ .compatible = "fsl,imx25-esdhc", .data = &esdhc_imx25_data, },
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{ .compatible = "fsl,imx35-esdhc", .data = &esdhc_imx35_data, },
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{ .compatible = "fsl,imx51-esdhc", .data = &esdhc_imx51_data, },
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{ .compatible = "fsl,imx53-esdhc", .data = &esdhc_imx53_data, },
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{ .compatible = "fsl,imx6sx-usdhc", .data = &usdhc_imx6sx_data, },
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{ .compatible = "fsl,imx6sl-usdhc", .data = &usdhc_imx6sl_data, },
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{ .compatible = "fsl,imx6q-usdhc", .data = &usdhc_imx6q_data, },
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{ .compatible = "fsl,imx7d-usdhc", .data = &usdhc_imx7d_data, },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, imx_esdhc_dt_ids);
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static inline int is_imx25_esdhc(struct pltfm_imx_data *data)
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{
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return data->socdata == &esdhc_imx25_data;
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}
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static inline int is_imx53_esdhc(struct pltfm_imx_data *data)
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{
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return data->socdata == &esdhc_imx53_data;
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}
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static inline int is_imx6q_usdhc(struct pltfm_imx_data *data)
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{
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return data->socdata == &usdhc_imx6q_data;
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}
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static inline int esdhc_is_usdhc(struct pltfm_imx_data *data)
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{
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return !!(data->socdata->flags & ESDHC_FLAG_USDHC);
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}
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static inline void esdhc_clrset_le(struct sdhci_host *host, u32 mask, u32 val, int reg)
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{
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void __iomem *base = host->ioaddr + (reg & ~0x3);
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u32 shift = (reg & 0x3) * 8;
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writel(((readl(base) & ~(mask << shift)) | (val << shift)), base);
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}
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static u32 esdhc_readl_le(struct sdhci_host *host, int reg)
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{
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struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
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struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
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u32 val = readl(host->ioaddr + reg);
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if (unlikely(reg == SDHCI_PRESENT_STATE)) {
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u32 fsl_prss = val;
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/* save the least 20 bits */
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val = fsl_prss & 0x000FFFFF;
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/* move dat[0-3] bits */
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val |= (fsl_prss & 0x0F000000) >> 4;
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/* move cmd line bit */
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val |= (fsl_prss & 0x00800000) << 1;
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}
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if (unlikely(reg == SDHCI_CAPABILITIES)) {
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/* ignore bit[0-15] as it stores cap_1 register val for mx6sl */
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if (imx_data->socdata->flags & ESDHC_FLAG_HAVE_CAP1)
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val &= 0xffff0000;
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/* In FSL esdhc IC module, only bit20 is used to indicate the
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* ADMA2 capability of esdhc, but this bit is messed up on
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* some SOCs (e.g. on MX25, MX35 this bit is set, but they
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* don't actually support ADMA2). So set the BROKEN_ADMA
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* uirk on MX25/35 platforms.
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*/
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if (val & SDHCI_CAN_DO_ADMA1) {
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val &= ~SDHCI_CAN_DO_ADMA1;
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val |= SDHCI_CAN_DO_ADMA2;
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}
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}
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if (unlikely(reg == SDHCI_CAPABILITIES_1)) {
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if (esdhc_is_usdhc(imx_data)) {
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if (imx_data->socdata->flags & ESDHC_FLAG_HAVE_CAP1)
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val = readl(host->ioaddr + SDHCI_CAPABILITIES) & 0xFFFF;
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else
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/* imx6q/dl does not have cap_1 register, fake one */
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val = SDHCI_SUPPORT_DDR50 | SDHCI_SUPPORT_SDR104
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| SDHCI_SUPPORT_SDR50
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| SDHCI_USE_SDR50_TUNING;
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if (imx_data->socdata->flags & ESDHC_FLAG_HS400)
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val |= SDHCI_SUPPORT_HS400;
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}
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}
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if (unlikely(reg == SDHCI_MAX_CURRENT) && esdhc_is_usdhc(imx_data)) {
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val = 0;
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val |= 0xFF << SDHCI_MAX_CURRENT_330_SHIFT;
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val |= 0xFF << SDHCI_MAX_CURRENT_300_SHIFT;
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val |= 0xFF << SDHCI_MAX_CURRENT_180_SHIFT;
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}
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if (unlikely(reg == SDHCI_INT_STATUS)) {
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if (val & ESDHC_INT_VENDOR_SPEC_DMA_ERR) {
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val &= ~ESDHC_INT_VENDOR_SPEC_DMA_ERR;
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val |= SDHCI_INT_ADMA_ERROR;
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}
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/*
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* mask off the interrupt we get in response to the manually
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* sent CMD12
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*/
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if ((imx_data->multiblock_status == WAIT_FOR_INT) &&
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((val & SDHCI_INT_RESPONSE) == SDHCI_INT_RESPONSE)) {
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val &= ~SDHCI_INT_RESPONSE;
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writel(SDHCI_INT_RESPONSE, host->ioaddr +
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SDHCI_INT_STATUS);
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imx_data->multiblock_status = NO_CMD_PENDING;
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}
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}
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return val;
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}
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static void esdhc_writel_le(struct sdhci_host *host, u32 val, int reg)
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{
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struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
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struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
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u32 data;
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if (unlikely(reg == SDHCI_INT_ENABLE || reg == SDHCI_SIGNAL_ENABLE)) {
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if ((val & SDHCI_INT_CARD_INT) && !esdhc_is_usdhc(imx_data)) {
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/*
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* Clear and then set D3CD bit to avoid missing the
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* card interrupt. This is a eSDHC controller problem
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* so we need to apply the following workaround: clear
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* and set D3CD bit will make eSDHC re-sample the card
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* interrupt. In case a card interrupt was lost,
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* re-sample it by the following steps.
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*/
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data = readl(host->ioaddr + SDHCI_HOST_CONTROL);
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data &= ~ESDHC_CTRL_D3CD;
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writel(data, host->ioaddr + SDHCI_HOST_CONTROL);
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data |= ESDHC_CTRL_D3CD;
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writel(data, host->ioaddr + SDHCI_HOST_CONTROL);
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}
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if (val & SDHCI_INT_ADMA_ERROR) {
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val &= ~SDHCI_INT_ADMA_ERROR;
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val |= ESDHC_INT_VENDOR_SPEC_DMA_ERR;
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}
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}
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if (unlikely((imx_data->socdata->flags & ESDHC_FLAG_MULTIBLK_NO_INT)
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&& (reg == SDHCI_INT_STATUS)
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&& (val & SDHCI_INT_DATA_END))) {
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u32 v;
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v = readl(host->ioaddr + ESDHC_VENDOR_SPEC);
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v &= ~ESDHC_VENDOR_SPEC_SDIO_QUIRK;
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writel(v, host->ioaddr + ESDHC_VENDOR_SPEC);
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if (imx_data->multiblock_status == MULTIBLK_IN_PROCESS)
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{
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/* send a manual CMD12 with RESPTYP=none */
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data = MMC_STOP_TRANSMISSION << 24 |
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SDHCI_CMD_ABORTCMD << 16;
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writel(data, host->ioaddr + SDHCI_TRANSFER_MODE);
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imx_data->multiblock_status = WAIT_FOR_INT;
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}
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}
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writel(val, host->ioaddr + reg);
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}
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static u16 esdhc_readw_le(struct sdhci_host *host, int reg)
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{
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struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
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struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
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u16 ret = 0;
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u32 val;
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if (unlikely(reg == SDHCI_HOST_VERSION)) {
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reg ^= 2;
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if (esdhc_is_usdhc(imx_data)) {
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/*
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* The usdhc register returns a wrong host version.
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* Correct it here.
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*/
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return SDHCI_SPEC_300;
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}
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}
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if (unlikely(reg == SDHCI_HOST_CONTROL2)) {
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val = readl(host->ioaddr + ESDHC_VENDOR_SPEC);
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if (val & ESDHC_VENDOR_SPEC_VSELECT)
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ret |= SDHCI_CTRL_VDD_180;
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if (esdhc_is_usdhc(imx_data)) {
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if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING)
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val = readl(host->ioaddr + ESDHC_MIX_CTRL);
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else if (imx_data->socdata->flags & ESDHC_FLAG_STD_TUNING)
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/* the std tuning bits is in ACMD12_ERR for imx6sl */
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val = readl(host->ioaddr + SDHCI_ACMD12_ERR);
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}
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if (val & ESDHC_MIX_CTRL_EXE_TUNE)
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ret |= SDHCI_CTRL_EXEC_TUNING;
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if (val & ESDHC_MIX_CTRL_SMPCLK_SEL)
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ret |= SDHCI_CTRL_TUNED_CLK;
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|
|
|
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;
|
|
else
|
|
new_val &= ~ESDHC_MIX_CTRL_SMPCLK_SEL;
|
|
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);
|
|
u32 tuning_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;
|
|
}
|
|
|
|
if (val & SDHCI_CTRL_EXEC_TUNING) {
|
|
v |= ESDHC_MIX_CTRL_EXE_TUNE;
|
|
m |= ESDHC_MIX_CTRL_FBCLK_SEL;
|
|
tuning_ctrl = readl(host->ioaddr + ESDHC_TUNING_CTRL);
|
|
tuning_ctrl |= ESDHC_STD_TUNING_EN | ESDHC_TUNING_START_TAP;
|
|
if (imx_data->boarddata.tuning_step) {
|
|
tuning_ctrl &= ~ESDHC_TUNING_STEP_MASK;
|
|
tuning_ctrl |= imx_data->boarddata.tuning_step << ESDHC_TUNING_STEP_SHIFT;
|
|
}
|
|
writel(tuning_ctrl, host->ioaddr + ESDHC_TUNING_CTRL);
|
|
} 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 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;
|
|
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 errata workaround.
|
|
*/
|
|
mask = 0xffff & ~(ESDHC_CTRL_BUSWIDTH_MASK | ESDHC_CTRL_D3CD);
|
|
|
|
esdhc_clrset_le(host, mask, new_val, reg);
|
|
return;
|
|
}
|
|
esdhc_clrset_le(host, 0xff, val, reg);
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
if ((reg == SDHCI_SOFTWARE_RESET) && (val & 1)) {
|
|
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;
|
|
}
|
|
}
|
|
}
|
|
|
|
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 pre_div = 2;
|
|
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;
|
|
}
|
|
|
|
if (esdhc_is_usdhc(imx_data) && !imx_data->is_ddr)
|
|
pre_div = 1;
|
|
|
|
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 / pre_div / 16 > clock && pre_div < 256)
|
|
pre_div *= 2;
|
|
|
|
while (host_clock / pre_div / div > clock && div < 16)
|
|
div++;
|
|
|
|
host->mmc->actual_clock = host_clock / pre_div / div;
|
|
dev_dbg(mmc_dev(host->mmc), "desired SD clock: %d, actual: %d\n",
|
|
clock, host->mmc->actual_clock);
|
|
|
|
if (imx_data->is_ddr)
|
|
pre_div >>= 2;
|
|
else
|
|
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),
|
|
"tunning 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;
|
|
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), "tunning %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:
|
|
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. Host receive 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 misaligned, read error shows up.
|
|
* So when the CLK is higher than 100MHz, each clock cycle is short enough,
|
|
* host should config 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) {
|
|
/* 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_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;
|
|
esdhc_set_strobe_dll(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);
|
|
|
|
return esdhc_is_usdhc(imx_data) ? 1 << 28 : 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 */
|
|
sdhci_writeb(host, 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,
|
|
.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,
|
|
};
|
|
|
|
#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);
|
|
|
|
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 needs 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 support uhs by specify 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 (!IS_ERR_VALUE(mmc_gpio_get_cd(host->mmc)))
|
|
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);
|
|
clk_prepare_enable(imx_data->clk_per);
|
|
clk_prepare_enable(imx_data->clk_ipg);
|
|
clk_prepare_enable(imx_data->clk_ahb);
|
|
|
|
imx_data->pinctrl = devm_pinctrl_get(&pdev->dev);
|
|
if (IS_ERR(imx_data->pinctrl)) {
|
|
err = PTR_ERR(imx_data->pinctrl);
|
|
goto disable_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");
|
|
|
|
host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
|
|
|
|
if (imx_data->socdata->flags & ESDHC_FLAG_ENGCM07207)
|
|
/* Fix errata ENGcm07207 present on i.MX25 and i.MX35 */
|
|
host->quirks |= SDHCI_QUIRK_NO_MULTIBLOCK
|
|
| SDHCI_QUIRK_BROKEN_ADMA;
|
|
|
|
/*
|
|
* The imx6q ROM code will change the default watermark level setting
|
|
* to something insane. Change it back here.
|
|
*/
|
|
if (esdhc_is_usdhc(imx_data)) {
|
|
writel(0x10401040, host->ioaddr + ESDHC_WTMK_LVL);
|
|
|
|
host->quirks2 |= SDHCI_QUIRK2_PRESET_VALUE_BROKEN;
|
|
host->mmc->caps |= MMC_CAP_1_8V_DDR;
|
|
|
|
/*
|
|
* ROM code will change the bit burst_length_enable setting
|
|
* to zero if this usdhc is choosed 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 usefully 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);
|
|
|
|
if (!(imx_data->socdata->flags & ESDHC_FLAG_HS200))
|
|
host->quirks2 |= SDHCI_QUIRK2_BROKEN_HS200;
|
|
|
|
/*
|
|
* errata 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);
|
|
}
|
|
|
|
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_STD_TUNING)
|
|
writel(readl(host->ioaddr + ESDHC_TUNING_CTRL) |
|
|
ESDHC_STD_TUNING_EN | ESDHC_TUNING_START_TAP,
|
|
host->ioaddr + ESDHC_TUNING_CTRL);
|
|
|
|
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_clk;
|
|
|
|
err = sdhci_add_host(host);
|
|
if (err)
|
|
goto disable_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_clk:
|
|
clk_disable_unprepare(imx_data->clk_per);
|
|
clk_disable_unprepare(imx_data->clk_ipg);
|
|
clk_disable_unprepare(imx_data->clk_ahb);
|
|
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
|
|
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 (!sdhci_sdio_irq_enabled(host)) {
|
|
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);
|
|
|
|
if (!sdhci_sdio_irq_enabled(host)) {
|
|
clk_prepare_enable(imx_data->clk_per);
|
|
clk_prepare_enable(imx_data->clk_ipg);
|
|
}
|
|
clk_prepare_enable(imx_data->clk_ahb);
|
|
|
|
return sdhci_runtime_resume_host(host);
|
|
}
|
|
#endif
|
|
|
|
static const struct dev_pm_ops sdhci_esdhc_pmops = {
|
|
SET_SYSTEM_SLEEP_PM_OPS(sdhci_pltfm_suspend, sdhci_pltfm_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");
|