716 lines
19 KiB
C
716 lines
19 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Driver for Marvell Xenon SDHC as a platform device
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*
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* Copyright (C) 2016 Marvell, All Rights Reserved.
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*
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* Author: Hu Ziji <huziji@marvell.com>
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* Date: 2016-8-24
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*
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* Inspired by Jisheng Zhang <jszhang@marvell.com>
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* Special thanks to Video BG4 project team.
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*/
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#include <linux/acpi.h>
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#include <linux/delay.h>
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#include <linux/ktime.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/pm.h>
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#include <linux/pm_runtime.h>
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#include "sdhci-pltfm.h"
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#include "sdhci-xenon.h"
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static int xenon_enable_internal_clk(struct sdhci_host *host)
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{
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u32 reg;
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ktime_t timeout;
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reg = sdhci_readl(host, SDHCI_CLOCK_CONTROL);
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reg |= SDHCI_CLOCK_INT_EN;
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sdhci_writel(host, reg, SDHCI_CLOCK_CONTROL);
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/* Wait max 20 ms */
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timeout = ktime_add_ms(ktime_get(), 20);
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while (1) {
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bool timedout = ktime_after(ktime_get(), timeout);
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reg = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
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if (reg & SDHCI_CLOCK_INT_STABLE)
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break;
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if (timedout) {
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dev_err(mmc_dev(host->mmc), "Internal clock never stabilised.\n");
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return -ETIMEDOUT;
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}
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usleep_range(900, 1100);
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}
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return 0;
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}
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/* Set SDCLK-off-while-idle */
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static void xenon_set_sdclk_off_idle(struct sdhci_host *host,
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unsigned char sdhc_id, bool enable)
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{
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u32 reg;
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u32 mask;
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reg = sdhci_readl(host, XENON_SYS_OP_CTRL);
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/* Get the bit shift basing on the SDHC index */
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mask = (0x1 << (XENON_SDCLK_IDLEOFF_ENABLE_SHIFT + sdhc_id));
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if (enable)
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reg |= mask;
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else
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reg &= ~mask;
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sdhci_writel(host, reg, XENON_SYS_OP_CTRL);
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}
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/* Enable/Disable the Auto Clock Gating function */
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static void xenon_set_acg(struct sdhci_host *host, bool enable)
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{
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u32 reg;
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reg = sdhci_readl(host, XENON_SYS_OP_CTRL);
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if (enable)
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reg &= ~XENON_AUTO_CLKGATE_DISABLE_MASK;
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else
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reg |= XENON_AUTO_CLKGATE_DISABLE_MASK;
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sdhci_writel(host, reg, XENON_SYS_OP_CTRL);
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}
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/* Enable this SDHC */
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static void xenon_enable_sdhc(struct sdhci_host *host,
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unsigned char sdhc_id)
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{
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u32 reg;
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reg = sdhci_readl(host, XENON_SYS_OP_CTRL);
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reg |= (BIT(sdhc_id) << XENON_SLOT_ENABLE_SHIFT);
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sdhci_writel(host, reg, XENON_SYS_OP_CTRL);
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host->mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY;
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/*
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* Force to clear BUS_TEST to
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* skip bus_test_pre and bus_test_post
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*/
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host->mmc->caps &= ~MMC_CAP_BUS_WIDTH_TEST;
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}
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/* Disable this SDHC */
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static void xenon_disable_sdhc(struct sdhci_host *host,
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unsigned char sdhc_id)
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{
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u32 reg;
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reg = sdhci_readl(host, XENON_SYS_OP_CTRL);
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reg &= ~(BIT(sdhc_id) << XENON_SLOT_ENABLE_SHIFT);
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sdhci_writel(host, reg, XENON_SYS_OP_CTRL);
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}
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/* Enable Parallel Transfer Mode */
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static void xenon_enable_sdhc_parallel_tran(struct sdhci_host *host,
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unsigned char sdhc_id)
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{
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u32 reg;
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reg = sdhci_readl(host, XENON_SYS_EXT_OP_CTRL);
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reg |= BIT(sdhc_id);
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sdhci_writel(host, reg, XENON_SYS_EXT_OP_CTRL);
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}
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/* Mask command conflict error */
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static void xenon_mask_cmd_conflict_err(struct sdhci_host *host)
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{
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u32 reg;
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reg = sdhci_readl(host, XENON_SYS_EXT_OP_CTRL);
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reg |= XENON_MASK_CMD_CONFLICT_ERR;
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sdhci_writel(host, reg, XENON_SYS_EXT_OP_CTRL);
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}
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static void xenon_retune_setup(struct sdhci_host *host)
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{
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struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
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struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
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u32 reg;
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/* Disable the Re-Tuning Request functionality */
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reg = sdhci_readl(host, XENON_SLOT_RETUNING_REQ_CTRL);
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reg &= ~XENON_RETUNING_COMPATIBLE;
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sdhci_writel(host, reg, XENON_SLOT_RETUNING_REQ_CTRL);
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/* Disable the Re-tuning Interrupt */
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reg = sdhci_readl(host, SDHCI_SIGNAL_ENABLE);
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reg &= ~SDHCI_INT_RETUNE;
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sdhci_writel(host, reg, SDHCI_SIGNAL_ENABLE);
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reg = sdhci_readl(host, SDHCI_INT_ENABLE);
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reg &= ~SDHCI_INT_RETUNE;
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sdhci_writel(host, reg, SDHCI_INT_ENABLE);
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/* Force to use Tuning Mode 1 */
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host->tuning_mode = SDHCI_TUNING_MODE_1;
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/* Set re-tuning period */
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host->tuning_count = 1 << (priv->tuning_count - 1);
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}
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/*
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* Operations inside struct sdhci_ops
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*/
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/* Recover the Register Setting cleared during SOFTWARE_RESET_ALL */
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static void xenon_reset_exit(struct sdhci_host *host,
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unsigned char sdhc_id, u8 mask)
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{
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/* Only SOFTWARE RESET ALL will clear the register setting */
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if (!(mask & SDHCI_RESET_ALL))
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return;
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/* Disable tuning request and auto-retuning again */
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xenon_retune_setup(host);
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/*
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* The ACG should be turned off at the early init time, in order
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* to solve a possible issues with the 1.8V regulator stabilization.
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* The feature is enabled in later stage.
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*/
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xenon_set_acg(host, false);
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xenon_set_sdclk_off_idle(host, sdhc_id, false);
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xenon_mask_cmd_conflict_err(host);
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}
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static void xenon_reset(struct sdhci_host *host, u8 mask)
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{
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struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
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struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
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sdhci_reset(host, mask);
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xenon_reset_exit(host, priv->sdhc_id, mask);
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}
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/*
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* Xenon defines different values for HS200 and HS400
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* in Host_Control_2
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*/
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static void xenon_set_uhs_signaling(struct sdhci_host *host,
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unsigned int timing)
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{
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u16 ctrl_2;
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ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
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/* Select Bus Speed Mode for host */
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ctrl_2 &= ~SDHCI_CTRL_UHS_MASK;
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if (timing == MMC_TIMING_MMC_HS200)
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ctrl_2 |= XENON_CTRL_HS200;
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else if (timing == MMC_TIMING_UHS_SDR104)
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ctrl_2 |= SDHCI_CTRL_UHS_SDR104;
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else if (timing == MMC_TIMING_UHS_SDR12)
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ctrl_2 |= SDHCI_CTRL_UHS_SDR12;
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else if (timing == MMC_TIMING_UHS_SDR25)
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ctrl_2 |= SDHCI_CTRL_UHS_SDR25;
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else if (timing == MMC_TIMING_UHS_SDR50)
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ctrl_2 |= SDHCI_CTRL_UHS_SDR50;
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else if ((timing == MMC_TIMING_UHS_DDR50) ||
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(timing == MMC_TIMING_MMC_DDR52))
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ctrl_2 |= SDHCI_CTRL_UHS_DDR50;
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else if (timing == MMC_TIMING_MMC_HS400)
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ctrl_2 |= XENON_CTRL_HS400;
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sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
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}
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static void xenon_set_power(struct sdhci_host *host, unsigned char mode,
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unsigned short vdd)
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{
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struct mmc_host *mmc = host->mmc;
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u8 pwr = host->pwr;
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sdhci_set_power_noreg(host, mode, vdd);
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if (host->pwr == pwr)
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return;
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if (host->pwr == 0)
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vdd = 0;
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if (!IS_ERR(mmc->supply.vmmc))
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mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd);
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}
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static void xenon_voltage_switch(struct sdhci_host *host)
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{
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/* Wait for 5ms after set 1.8V signal enable bit */
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usleep_range(5000, 5500);
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}
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static unsigned int xenon_get_max_clock(struct sdhci_host *host)
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{
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struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
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if (pltfm_host->clk)
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return sdhci_pltfm_clk_get_max_clock(host);
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else
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return pltfm_host->clock;
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}
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static const struct sdhci_ops sdhci_xenon_ops = {
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.voltage_switch = xenon_voltage_switch,
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.set_clock = sdhci_set_clock,
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.set_power = xenon_set_power,
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.set_bus_width = sdhci_set_bus_width,
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.reset = xenon_reset,
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.set_uhs_signaling = xenon_set_uhs_signaling,
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.get_max_clock = xenon_get_max_clock,
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};
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static const struct sdhci_pltfm_data sdhci_xenon_pdata = {
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.ops = &sdhci_xenon_ops,
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.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
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SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER |
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SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
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};
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/*
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* Xenon Specific Operations in mmc_host_ops
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*/
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static void xenon_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
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{
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struct sdhci_host *host = mmc_priv(mmc);
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struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
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struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
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u32 reg;
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/*
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* HS400/HS200/eMMC HS doesn't have Preset Value register.
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* However, sdhci_set_ios will read HS400/HS200 Preset register.
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* Disable Preset Value register for HS400/HS200.
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* eMMC HS with preset_enabled set will trigger a bug in
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* get_preset_value().
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*/
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if ((ios->timing == MMC_TIMING_MMC_HS400) ||
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(ios->timing == MMC_TIMING_MMC_HS200) ||
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(ios->timing == MMC_TIMING_MMC_HS)) {
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host->preset_enabled = false;
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host->quirks2 |= SDHCI_QUIRK2_PRESET_VALUE_BROKEN;
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host->flags &= ~SDHCI_PV_ENABLED;
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reg = sdhci_readw(host, SDHCI_HOST_CONTROL2);
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reg &= ~SDHCI_CTRL_PRESET_VAL_ENABLE;
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sdhci_writew(host, reg, SDHCI_HOST_CONTROL2);
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} else {
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host->quirks2 &= ~SDHCI_QUIRK2_PRESET_VALUE_BROKEN;
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}
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sdhci_set_ios(mmc, ios);
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xenon_phy_adj(host, ios);
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if (host->clock > XENON_DEFAULT_SDCLK_FREQ)
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xenon_set_sdclk_off_idle(host, priv->sdhc_id, true);
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}
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static int xenon_start_signal_voltage_switch(struct mmc_host *mmc,
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struct mmc_ios *ios)
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{
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struct sdhci_host *host = mmc_priv(mmc);
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/*
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* Before SD/SDIO set signal voltage, SD bus clock should be
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* disabled. However, sdhci_set_clock will also disable the Internal
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* clock in mmc_set_signal_voltage().
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* If Internal clock is disabled, the 3.3V/1.8V bit can not be updated.
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* Thus here manually enable internal clock.
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*
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* After switch completes, it is unnecessary to disable internal clock,
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* since keeping internal clock active obeys SD spec.
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*/
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xenon_enable_internal_clk(host);
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xenon_soc_pad_ctrl(host, ios->signal_voltage);
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/*
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* If Vqmmc is fixed on platform, vqmmc regulator should be unavailable.
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* Thus SDHCI_CTRL_VDD_180 bit might not work then.
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* Skip the standard voltage switch to avoid any issue.
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*/
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if (PTR_ERR(mmc->supply.vqmmc) == -ENODEV)
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return 0;
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return sdhci_start_signal_voltage_switch(mmc, ios);
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}
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/*
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* Update card type.
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* priv->init_card_type will be used in PHY timing adjustment.
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*/
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static void xenon_init_card(struct mmc_host *mmc, struct mmc_card *card)
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{
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struct sdhci_host *host = mmc_priv(mmc);
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struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
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struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
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/* Update card type*/
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priv->init_card_type = card->type;
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}
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static int xenon_execute_tuning(struct mmc_host *mmc, u32 opcode)
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{
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struct sdhci_host *host = mmc_priv(mmc);
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if (host->timing == MMC_TIMING_UHS_DDR50 ||
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host->timing == MMC_TIMING_MMC_DDR52)
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return 0;
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/*
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* Currently force Xenon driver back to support mode 1 only,
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* even though Xenon might claim to support mode 2 or mode 3.
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* It requires more time to test mode 2/mode 3 on more platforms.
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*/
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if (host->tuning_mode != SDHCI_TUNING_MODE_1)
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xenon_retune_setup(host);
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return sdhci_execute_tuning(mmc, opcode);
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}
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static void xenon_enable_sdio_irq(struct mmc_host *mmc, int enable)
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{
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struct sdhci_host *host = mmc_priv(mmc);
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struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
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struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
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u32 reg;
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u8 sdhc_id = priv->sdhc_id;
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sdhci_enable_sdio_irq(mmc, enable);
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if (enable) {
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/*
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* Set SDIO Card Inserted indication
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* to enable detecting SDIO async irq.
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*/
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reg = sdhci_readl(host, XENON_SYS_CFG_INFO);
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reg |= (1 << (sdhc_id + XENON_SLOT_TYPE_SDIO_SHIFT));
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sdhci_writel(host, reg, XENON_SYS_CFG_INFO);
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} else {
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/* Clear SDIO Card Inserted indication */
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reg = sdhci_readl(host, XENON_SYS_CFG_INFO);
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reg &= ~(1 << (sdhc_id + XENON_SLOT_TYPE_SDIO_SHIFT));
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sdhci_writel(host, reg, XENON_SYS_CFG_INFO);
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}
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}
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static void xenon_replace_mmc_host_ops(struct sdhci_host *host)
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{
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host->mmc_host_ops.set_ios = xenon_set_ios;
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host->mmc_host_ops.start_signal_voltage_switch =
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xenon_start_signal_voltage_switch;
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host->mmc_host_ops.init_card = xenon_init_card;
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host->mmc_host_ops.execute_tuning = xenon_execute_tuning;
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host->mmc_host_ops.enable_sdio_irq = xenon_enable_sdio_irq;
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}
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/*
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* Parse Xenon specific DT properties:
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* sdhc-id: the index of current SDHC.
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* Refer to XENON_SYS_CFG_INFO register
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* tun-count: the interval between re-tuning
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*/
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static int xenon_probe_params(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct sdhci_host *host = platform_get_drvdata(pdev);
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struct mmc_host *mmc = host->mmc;
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struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
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struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
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u32 sdhc_id, nr_sdhc;
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u32 tuning_count;
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/* Disable HS200 on Armada AP806 */
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if (priv->hw_version == XENON_AP806)
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host->quirks2 |= SDHCI_QUIRK2_BROKEN_HS200;
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sdhc_id = 0x0;
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if (!device_property_read_u32(dev, "marvell,xenon-sdhc-id", &sdhc_id)) {
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nr_sdhc = sdhci_readl(host, XENON_SYS_CFG_INFO);
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nr_sdhc &= XENON_NR_SUPPORTED_SLOT_MASK;
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if (unlikely(sdhc_id > nr_sdhc)) {
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dev_err(mmc_dev(mmc), "SDHC Index %d exceeds Number of SDHCs %d\n",
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sdhc_id, nr_sdhc);
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return -EINVAL;
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}
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}
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priv->sdhc_id = sdhc_id;
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tuning_count = XENON_DEF_TUNING_COUNT;
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if (!device_property_read_u32(dev, "marvell,xenon-tun-count",
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&tuning_count)) {
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if (unlikely(tuning_count >= XENON_TMR_RETUN_NO_PRESENT)) {
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dev_err(mmc_dev(mmc), "Wrong Re-tuning Count. Set default value %d\n",
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XENON_DEF_TUNING_COUNT);
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tuning_count = XENON_DEF_TUNING_COUNT;
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}
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}
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priv->tuning_count = tuning_count;
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return xenon_phy_parse_params(dev, host);
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}
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static int xenon_sdhc_prepare(struct sdhci_host *host)
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{
|
|
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
|
|
struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
|
|
u8 sdhc_id = priv->sdhc_id;
|
|
|
|
/* Enable SDHC */
|
|
xenon_enable_sdhc(host, sdhc_id);
|
|
|
|
/* Enable ACG */
|
|
xenon_set_acg(host, true);
|
|
|
|
/* Enable Parallel Transfer Mode */
|
|
xenon_enable_sdhc_parallel_tran(host, sdhc_id);
|
|
|
|
/* Disable SDCLK-Off-While-Idle before card init */
|
|
xenon_set_sdclk_off_idle(host, sdhc_id, false);
|
|
|
|
xenon_mask_cmd_conflict_err(host);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void xenon_sdhc_unprepare(struct sdhci_host *host)
|
|
{
|
|
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
|
|
struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
|
|
u8 sdhc_id = priv->sdhc_id;
|
|
|
|
/* disable SDHC */
|
|
xenon_disable_sdhc(host, sdhc_id);
|
|
}
|
|
|
|
static int xenon_probe(struct platform_device *pdev)
|
|
{
|
|
struct sdhci_pltfm_host *pltfm_host;
|
|
struct device *dev = &pdev->dev;
|
|
struct sdhci_host *host;
|
|
struct xenon_priv *priv;
|
|
int err;
|
|
|
|
host = sdhci_pltfm_init(pdev, &sdhci_xenon_pdata,
|
|
sizeof(struct xenon_priv));
|
|
if (IS_ERR(host))
|
|
return PTR_ERR(host);
|
|
|
|
pltfm_host = sdhci_priv(host);
|
|
priv = sdhci_pltfm_priv(pltfm_host);
|
|
|
|
priv->hw_version = (unsigned long)device_get_match_data(&pdev->dev);
|
|
|
|
/*
|
|
* Link Xenon specific mmc_host_ops function,
|
|
* to replace standard ones in sdhci_ops.
|
|
*/
|
|
xenon_replace_mmc_host_ops(host);
|
|
|
|
if (dev->of_node) {
|
|
pltfm_host->clk = devm_clk_get(&pdev->dev, "core");
|
|
if (IS_ERR(pltfm_host->clk)) {
|
|
err = PTR_ERR(pltfm_host->clk);
|
|
dev_err(&pdev->dev, "Failed to setup input clk: %d\n", err);
|
|
goto free_pltfm;
|
|
}
|
|
err = clk_prepare_enable(pltfm_host->clk);
|
|
if (err)
|
|
goto free_pltfm;
|
|
|
|
priv->axi_clk = devm_clk_get(&pdev->dev, "axi");
|
|
if (IS_ERR(priv->axi_clk)) {
|
|
err = PTR_ERR(priv->axi_clk);
|
|
if (err == -EPROBE_DEFER)
|
|
goto err_clk;
|
|
} else {
|
|
err = clk_prepare_enable(priv->axi_clk);
|
|
if (err)
|
|
goto err_clk;
|
|
}
|
|
}
|
|
|
|
err = mmc_of_parse(host->mmc);
|
|
if (err)
|
|
goto err_clk_axi;
|
|
|
|
sdhci_get_property(pdev);
|
|
|
|
xenon_set_acg(host, false);
|
|
|
|
/* Xenon specific parameters parse */
|
|
err = xenon_probe_params(pdev);
|
|
if (err)
|
|
goto err_clk_axi;
|
|
|
|
err = xenon_sdhc_prepare(host);
|
|
if (err)
|
|
goto err_clk_axi;
|
|
|
|
pm_runtime_get_noresume(&pdev->dev);
|
|
pm_runtime_set_active(&pdev->dev);
|
|
pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
|
|
pm_runtime_use_autosuspend(&pdev->dev);
|
|
pm_runtime_enable(&pdev->dev);
|
|
pm_suspend_ignore_children(&pdev->dev, 1);
|
|
|
|
err = sdhci_add_host(host);
|
|
if (err)
|
|
goto remove_sdhc;
|
|
|
|
pm_runtime_put_autosuspend(&pdev->dev);
|
|
|
|
return 0;
|
|
|
|
remove_sdhc:
|
|
pm_runtime_disable(&pdev->dev);
|
|
pm_runtime_put_noidle(&pdev->dev);
|
|
xenon_sdhc_unprepare(host);
|
|
err_clk_axi:
|
|
clk_disable_unprepare(priv->axi_clk);
|
|
err_clk:
|
|
clk_disable_unprepare(pltfm_host->clk);
|
|
free_pltfm:
|
|
sdhci_pltfm_free(pdev);
|
|
return err;
|
|
}
|
|
|
|
static int xenon_remove(struct platform_device *pdev)
|
|
{
|
|
struct sdhci_host *host = platform_get_drvdata(pdev);
|
|
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
|
|
struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
|
|
|
|
pm_runtime_get_sync(&pdev->dev);
|
|
pm_runtime_disable(&pdev->dev);
|
|
pm_runtime_put_noidle(&pdev->dev);
|
|
|
|
sdhci_remove_host(host, 0);
|
|
|
|
xenon_sdhc_unprepare(host);
|
|
clk_disable_unprepare(priv->axi_clk);
|
|
clk_disable_unprepare(pltfm_host->clk);
|
|
|
|
sdhci_pltfm_free(pdev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int xenon_suspend(struct device *dev)
|
|
{
|
|
struct sdhci_host *host = dev_get_drvdata(dev);
|
|
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
|
|
struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
|
|
int ret;
|
|
|
|
ret = pm_runtime_force_suspend(dev);
|
|
|
|
priv->restore_needed = true;
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_PM
|
|
static int xenon_runtime_suspend(struct device *dev)
|
|
{
|
|
struct sdhci_host *host = dev_get_drvdata(dev);
|
|
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
|
|
struct xenon_priv *priv = 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);
|
|
|
|
clk_disable_unprepare(pltfm_host->clk);
|
|
/*
|
|
* Need to update the priv->clock here, or when runtime resume
|
|
* back, phy don't aware the clock change and won't adjust phy
|
|
* which will cause cmd err
|
|
*/
|
|
priv->clock = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int xenon_runtime_resume(struct device *dev)
|
|
{
|
|
struct sdhci_host *host = dev_get_drvdata(dev);
|
|
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
|
|
struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
|
|
int ret;
|
|
|
|
ret = clk_prepare_enable(pltfm_host->clk);
|
|
if (ret) {
|
|
dev_err(dev, "can't enable mainck\n");
|
|
return ret;
|
|
}
|
|
|
|
if (priv->restore_needed) {
|
|
ret = xenon_sdhc_prepare(host);
|
|
if (ret)
|
|
goto out;
|
|
priv->restore_needed = false;
|
|
}
|
|
|
|
ret = sdhci_runtime_resume_host(host, 0);
|
|
if (ret)
|
|
goto out;
|
|
return 0;
|
|
out:
|
|
clk_disable_unprepare(pltfm_host->clk);
|
|
return ret;
|
|
}
|
|
#endif /* CONFIG_PM */
|
|
|
|
static const struct dev_pm_ops sdhci_xenon_dev_pm_ops = {
|
|
SET_SYSTEM_SLEEP_PM_OPS(xenon_suspend,
|
|
pm_runtime_force_resume)
|
|
SET_RUNTIME_PM_OPS(xenon_runtime_suspend,
|
|
xenon_runtime_resume,
|
|
NULL)
|
|
};
|
|
|
|
static const struct of_device_id sdhci_xenon_dt_ids[] = {
|
|
{ .compatible = "marvell,armada-ap806-sdhci", .data = (void *)XENON_AP806},
|
|
{ .compatible = "marvell,armada-ap807-sdhci", .data = (void *)XENON_AP807},
|
|
{ .compatible = "marvell,armada-cp110-sdhci", .data = (void *)XENON_CP110},
|
|
{ .compatible = "marvell,armada-3700-sdhci", .data = (void *)XENON_A3700},
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(of, sdhci_xenon_dt_ids);
|
|
|
|
#ifdef CONFIG_ACPI
|
|
static const struct acpi_device_id sdhci_xenon_acpi_ids[] = {
|
|
{ .id = "MRVL0002", XENON_AP806},
|
|
{ .id = "MRVL0003", XENON_AP807},
|
|
{ .id = "MRVL0004", XENON_CP110},
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(acpi, sdhci_xenon_acpi_ids);
|
|
#endif
|
|
|
|
static struct platform_driver sdhci_xenon_driver = {
|
|
.driver = {
|
|
.name = "xenon-sdhci",
|
|
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
|
|
.of_match_table = sdhci_xenon_dt_ids,
|
|
.acpi_match_table = ACPI_PTR(sdhci_xenon_acpi_ids),
|
|
.pm = &sdhci_xenon_dev_pm_ops,
|
|
},
|
|
.probe = xenon_probe,
|
|
.remove = xenon_remove,
|
|
};
|
|
|
|
module_platform_driver(sdhci_xenon_driver);
|
|
|
|
MODULE_DESCRIPTION("SDHCI platform driver for Marvell Xenon SDHC");
|
|
MODULE_AUTHOR("Hu Ziji <huziji@marvell.com>");
|
|
MODULE_LICENSE("GPL v2");
|