1e3ec3a3dSSoren Brinkmann /* 2e3ec3a3dSSoren Brinkmann * Arasan Secure Digital Host Controller Interface. 3e3ec3a3dSSoren Brinkmann * Copyright (C) 2011 - 2012 Michal Simek <monstr@monstr.eu> 4e3ec3a3dSSoren Brinkmann * Copyright (c) 2012 Wind River Systems, Inc. 5e3ec3a3dSSoren Brinkmann * Copyright (C) 2013 Pengutronix e.K. 6e3ec3a3dSSoren Brinkmann * Copyright (C) 2013 Xilinx Inc. 7e3ec3a3dSSoren Brinkmann * 8e3ec3a3dSSoren Brinkmann * Based on sdhci-of-esdhc.c 9e3ec3a3dSSoren Brinkmann * 10e3ec3a3dSSoren Brinkmann * Copyright (c) 2007 Freescale Semiconductor, Inc. 11e3ec3a3dSSoren Brinkmann * Copyright (c) 2009 MontaVista Software, Inc. 12e3ec3a3dSSoren Brinkmann * 13e3ec3a3dSSoren Brinkmann * Authors: Xiaobo Xie <X.Xie@freescale.com> 14e3ec3a3dSSoren Brinkmann * Anton Vorontsov <avorontsov@ru.mvista.com> 15e3ec3a3dSSoren Brinkmann * 16e3ec3a3dSSoren Brinkmann * This program is free software; you can redistribute it and/or modify 17e3ec3a3dSSoren Brinkmann * it under the terms of the GNU General Public License as published by 18e3ec3a3dSSoren Brinkmann * the Free Software Foundation; either version 2 of the License, or (at 19e3ec3a3dSSoren Brinkmann * your option) any later version. 20e3ec3a3dSSoren Brinkmann */ 21e3ec3a3dSSoren Brinkmann 22e3ec3a3dSSoren Brinkmann #include <linux/module.h> 23308f3f8dSSuman Tripathi #include <linux/of_device.h> 2491aa3661SShawn Lin #include <linux/phy/phy.h> 25e3ec3a3dSSoren Brinkmann #include "sdhci-pltfm.h" 26e3ec3a3dSSoren Brinkmann 27e3ec3a3dSSoren Brinkmann #define SDHCI_ARASAN_CLK_CTRL_OFFSET 0x2c 28e3ec3a3dSSoren Brinkmann 29e3ec3a3dSSoren Brinkmann #define CLK_CTRL_TIMEOUT_SHIFT 16 30e3ec3a3dSSoren Brinkmann #define CLK_CTRL_TIMEOUT_MASK (0xf << CLK_CTRL_TIMEOUT_SHIFT) 31e3ec3a3dSSoren Brinkmann #define CLK_CTRL_TIMEOUT_MIN_EXP 13 32e3ec3a3dSSoren Brinkmann 33e3ec3a3dSSoren Brinkmann /** 34e3ec3a3dSSoren Brinkmann * struct sdhci_arasan_data 35e3ec3a3dSSoren Brinkmann * @clk_ahb: Pointer to the AHB clock 3691aa3661SShawn Lin * @phy: Pointer to the generic phy 37e3ec3a3dSSoren Brinkmann */ 38e3ec3a3dSSoren Brinkmann struct sdhci_arasan_data { 39e3ec3a3dSSoren Brinkmann struct clk *clk_ahb; 4091aa3661SShawn Lin struct phy *phy; 41e3ec3a3dSSoren Brinkmann }; 42e3ec3a3dSSoren Brinkmann 43e3ec3a3dSSoren Brinkmann static unsigned int sdhci_arasan_get_timeout_clock(struct sdhci_host *host) 44e3ec3a3dSSoren Brinkmann { 45e3ec3a3dSSoren Brinkmann u32 div; 46e3ec3a3dSSoren Brinkmann unsigned long freq; 47e3ec3a3dSSoren Brinkmann struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 48e3ec3a3dSSoren Brinkmann 49e3ec3a3dSSoren Brinkmann div = readl(host->ioaddr + SDHCI_ARASAN_CLK_CTRL_OFFSET); 50e3ec3a3dSSoren Brinkmann div = (div & CLK_CTRL_TIMEOUT_MASK) >> CLK_CTRL_TIMEOUT_SHIFT; 51e3ec3a3dSSoren Brinkmann 52e3ec3a3dSSoren Brinkmann freq = clk_get_rate(pltfm_host->clk); 53e3ec3a3dSSoren Brinkmann freq /= 1 << (CLK_CTRL_TIMEOUT_MIN_EXP + div); 54e3ec3a3dSSoren Brinkmann 55e3ec3a3dSSoren Brinkmann return freq; 56e3ec3a3dSSoren Brinkmann } 57e3ec3a3dSSoren Brinkmann 58e3ec3a3dSSoren Brinkmann static struct sdhci_ops sdhci_arasan_ops = { 591771059cSRussell King .set_clock = sdhci_set_clock, 60e3ec3a3dSSoren Brinkmann .get_max_clock = sdhci_pltfm_clk_get_max_clock, 61e3ec3a3dSSoren Brinkmann .get_timeout_clock = sdhci_arasan_get_timeout_clock, 622317f56cSRussell King .set_bus_width = sdhci_set_bus_width, 6303231f9bSRussell King .reset = sdhci_reset, 6496d7b78cSRussell King .set_uhs_signaling = sdhci_set_uhs_signaling, 65e3ec3a3dSSoren Brinkmann }; 66e3ec3a3dSSoren Brinkmann 67e3ec3a3dSSoren Brinkmann static struct sdhci_pltfm_data sdhci_arasan_pdata = { 68e3ec3a3dSSoren Brinkmann .ops = &sdhci_arasan_ops, 692d532d45SSuneel Garapati .quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN, 702d532d45SSuneel Garapati .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN | 712d532d45SSuneel Garapati SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN, 72e3ec3a3dSSoren Brinkmann }; 73e3ec3a3dSSoren Brinkmann 74e3ec3a3dSSoren Brinkmann #ifdef CONFIG_PM_SLEEP 75e3ec3a3dSSoren Brinkmann /** 76e3ec3a3dSSoren Brinkmann * sdhci_arasan_suspend - Suspend method for the driver 77e3ec3a3dSSoren Brinkmann * @dev: Address of the device structure 78e3ec3a3dSSoren Brinkmann * Returns 0 on success and error value on error 79e3ec3a3dSSoren Brinkmann * 80e3ec3a3dSSoren Brinkmann * Put the device in a low power state. 81e3ec3a3dSSoren Brinkmann */ 82e3ec3a3dSSoren Brinkmann static int sdhci_arasan_suspend(struct device *dev) 83e3ec3a3dSSoren Brinkmann { 84e3ec3a3dSSoren Brinkmann struct platform_device *pdev = to_platform_device(dev); 85e3ec3a3dSSoren Brinkmann struct sdhci_host *host = platform_get_drvdata(pdev); 86e3ec3a3dSSoren Brinkmann struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 8789211418SJisheng Zhang struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host); 88e3ec3a3dSSoren Brinkmann int ret; 89e3ec3a3dSSoren Brinkmann 90e3ec3a3dSSoren Brinkmann ret = sdhci_suspend_host(host); 91e3ec3a3dSSoren Brinkmann if (ret) 92e3ec3a3dSSoren Brinkmann return ret; 93e3ec3a3dSSoren Brinkmann 9491aa3661SShawn Lin if (!IS_ERR(sdhci_arasan->phy)) { 9591aa3661SShawn Lin ret = phy_power_off(sdhci_arasan->phy); 9691aa3661SShawn Lin if (ret) { 9791aa3661SShawn Lin dev_err(dev, "Cannot power off phy.\n"); 9891aa3661SShawn Lin sdhci_resume_host(host); 9991aa3661SShawn Lin return ret; 10091aa3661SShawn Lin } 10191aa3661SShawn Lin } 10291aa3661SShawn Lin 103e3ec3a3dSSoren Brinkmann clk_disable(pltfm_host->clk); 104e3ec3a3dSSoren Brinkmann clk_disable(sdhci_arasan->clk_ahb); 105e3ec3a3dSSoren Brinkmann 106e3ec3a3dSSoren Brinkmann return 0; 107e3ec3a3dSSoren Brinkmann } 108e3ec3a3dSSoren Brinkmann 109e3ec3a3dSSoren Brinkmann /** 110e3ec3a3dSSoren Brinkmann * sdhci_arasan_resume - Resume method for the driver 111e3ec3a3dSSoren Brinkmann * @dev: Address of the device structure 112e3ec3a3dSSoren Brinkmann * Returns 0 on success and error value on error 113e3ec3a3dSSoren Brinkmann * 114e3ec3a3dSSoren Brinkmann * Resume operation after suspend 115e3ec3a3dSSoren Brinkmann */ 116e3ec3a3dSSoren Brinkmann static int sdhci_arasan_resume(struct device *dev) 117e3ec3a3dSSoren Brinkmann { 118e3ec3a3dSSoren Brinkmann struct platform_device *pdev = to_platform_device(dev); 119e3ec3a3dSSoren Brinkmann struct sdhci_host *host = platform_get_drvdata(pdev); 120e3ec3a3dSSoren Brinkmann struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 12189211418SJisheng Zhang struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host); 122e3ec3a3dSSoren Brinkmann int ret; 123e3ec3a3dSSoren Brinkmann 124e3ec3a3dSSoren Brinkmann ret = clk_enable(sdhci_arasan->clk_ahb); 125e3ec3a3dSSoren Brinkmann if (ret) { 126e3ec3a3dSSoren Brinkmann dev_err(dev, "Cannot enable AHB clock.\n"); 127e3ec3a3dSSoren Brinkmann return ret; 128e3ec3a3dSSoren Brinkmann } 129e3ec3a3dSSoren Brinkmann 130e3ec3a3dSSoren Brinkmann ret = clk_enable(pltfm_host->clk); 131e3ec3a3dSSoren Brinkmann if (ret) { 132e3ec3a3dSSoren Brinkmann dev_err(dev, "Cannot enable SD clock.\n"); 133e3ec3a3dSSoren Brinkmann return ret; 134e3ec3a3dSSoren Brinkmann } 135e3ec3a3dSSoren Brinkmann 13691aa3661SShawn Lin if (!IS_ERR(sdhci_arasan->phy)) { 13791aa3661SShawn Lin ret = phy_power_on(sdhci_arasan->phy); 13891aa3661SShawn Lin if (ret) { 13991aa3661SShawn Lin dev_err(dev, "Cannot power on phy.\n"); 14091aa3661SShawn Lin return ret; 14191aa3661SShawn Lin } 14291aa3661SShawn Lin } 14391aa3661SShawn Lin 144e3ec3a3dSSoren Brinkmann return sdhci_resume_host(host); 145e3ec3a3dSSoren Brinkmann } 146e3ec3a3dSSoren Brinkmann #endif /* ! CONFIG_PM_SLEEP */ 147e3ec3a3dSSoren Brinkmann 148e3ec3a3dSSoren Brinkmann static SIMPLE_DEV_PM_OPS(sdhci_arasan_dev_pm_ops, sdhci_arasan_suspend, 149e3ec3a3dSSoren Brinkmann sdhci_arasan_resume); 150e3ec3a3dSSoren Brinkmann 151e3ec3a3dSSoren Brinkmann static int sdhci_arasan_probe(struct platform_device *pdev) 152e3ec3a3dSSoren Brinkmann { 153e3ec3a3dSSoren Brinkmann int ret; 154e3ec3a3dSSoren Brinkmann struct clk *clk_xin; 155e3ec3a3dSSoren Brinkmann struct sdhci_host *host; 156e3ec3a3dSSoren Brinkmann struct sdhci_pltfm_host *pltfm_host; 157e3ec3a3dSSoren Brinkmann struct sdhci_arasan_data *sdhci_arasan; 158e3ec3a3dSSoren Brinkmann 15989211418SJisheng Zhang host = sdhci_pltfm_init(pdev, &sdhci_arasan_pdata, 16089211418SJisheng Zhang sizeof(*sdhci_arasan)); 16189211418SJisheng Zhang if (IS_ERR(host)) 16289211418SJisheng Zhang return PTR_ERR(host); 16389211418SJisheng Zhang 16489211418SJisheng Zhang pltfm_host = sdhci_priv(host); 16589211418SJisheng Zhang sdhci_arasan = sdhci_pltfm_priv(pltfm_host); 166e3ec3a3dSSoren Brinkmann 167e3ec3a3dSSoren Brinkmann sdhci_arasan->clk_ahb = devm_clk_get(&pdev->dev, "clk_ahb"); 168e3ec3a3dSSoren Brinkmann if (IS_ERR(sdhci_arasan->clk_ahb)) { 169e3ec3a3dSSoren Brinkmann dev_err(&pdev->dev, "clk_ahb clock not found.\n"); 170278d0962SShawn Lin ret = PTR_ERR(sdhci_arasan->clk_ahb); 171278d0962SShawn Lin goto err_pltfm_free; 172e3ec3a3dSSoren Brinkmann } 173e3ec3a3dSSoren Brinkmann 174e3ec3a3dSSoren Brinkmann clk_xin = devm_clk_get(&pdev->dev, "clk_xin"); 175e3ec3a3dSSoren Brinkmann if (IS_ERR(clk_xin)) { 176e3ec3a3dSSoren Brinkmann dev_err(&pdev->dev, "clk_xin clock not found.\n"); 177278d0962SShawn Lin ret = PTR_ERR(clk_xin); 178278d0962SShawn Lin goto err_pltfm_free; 179e3ec3a3dSSoren Brinkmann } 180e3ec3a3dSSoren Brinkmann 181e3ec3a3dSSoren Brinkmann ret = clk_prepare_enable(sdhci_arasan->clk_ahb); 182e3ec3a3dSSoren Brinkmann if (ret) { 183e3ec3a3dSSoren Brinkmann dev_err(&pdev->dev, "Unable to enable AHB clock.\n"); 184278d0962SShawn Lin goto err_pltfm_free; 185e3ec3a3dSSoren Brinkmann } 186e3ec3a3dSSoren Brinkmann 187e3ec3a3dSSoren Brinkmann ret = clk_prepare_enable(clk_xin); 188e3ec3a3dSSoren Brinkmann if (ret) { 189e3ec3a3dSSoren Brinkmann dev_err(&pdev->dev, "Unable to enable SD clock.\n"); 190e3ec3a3dSSoren Brinkmann goto clk_dis_ahb; 191e3ec3a3dSSoren Brinkmann } 192e3ec3a3dSSoren Brinkmann 193e3ec3a3dSSoren Brinkmann sdhci_get_of_property(pdev); 194e3ec3a3dSSoren Brinkmann pltfm_host->clk = clk_xin; 195e3ec3a3dSSoren Brinkmann 19616b23787SMichal Simek ret = mmc_of_parse(host->mmc); 19716b23787SMichal Simek if (ret) { 19816b23787SMichal Simek dev_err(&pdev->dev, "parsing dt failed (%u)\n", ret); 19916b23787SMichal Simek goto clk_disable_all; 20016b23787SMichal Simek } 20116b23787SMichal Simek 20291aa3661SShawn Lin sdhci_arasan->phy = ERR_PTR(-ENODEV); 20391aa3661SShawn Lin if (of_device_is_compatible(pdev->dev.of_node, 20491aa3661SShawn Lin "arasan,sdhci-5.1")) { 20591aa3661SShawn Lin sdhci_arasan->phy = devm_phy_get(&pdev->dev, 20691aa3661SShawn Lin "phy_arasan"); 20791aa3661SShawn Lin if (IS_ERR(sdhci_arasan->phy)) { 20891aa3661SShawn Lin ret = PTR_ERR(sdhci_arasan->phy); 20991aa3661SShawn Lin dev_err(&pdev->dev, "No phy for arasan,sdhci-5.1.\n"); 21091aa3661SShawn Lin goto clk_disable_all; 21191aa3661SShawn Lin } 21291aa3661SShawn Lin 21391aa3661SShawn Lin ret = phy_init(sdhci_arasan->phy); 21491aa3661SShawn Lin if (ret < 0) { 21591aa3661SShawn Lin dev_err(&pdev->dev, "phy_init err.\n"); 21691aa3661SShawn Lin goto clk_disable_all; 21791aa3661SShawn Lin } 21891aa3661SShawn Lin 21991aa3661SShawn Lin ret = phy_power_on(sdhci_arasan->phy); 22091aa3661SShawn Lin if (ret < 0) { 22191aa3661SShawn Lin dev_err(&pdev->dev, "phy_power_on err.\n"); 22291aa3661SShawn Lin goto err_phy_power; 22391aa3661SShawn Lin } 22491aa3661SShawn Lin } 22591aa3661SShawn Lin 226e3ec3a3dSSoren Brinkmann ret = sdhci_add_host(host); 227b1df9de7SMike Looijmans if (ret) 22891aa3661SShawn Lin goto err_add_host; 229e3ec3a3dSSoren Brinkmann 230e3ec3a3dSSoren Brinkmann return 0; 231e3ec3a3dSSoren Brinkmann 23291aa3661SShawn Lin err_add_host: 23391aa3661SShawn Lin if (!IS_ERR(sdhci_arasan->phy)) 23491aa3661SShawn Lin phy_power_off(sdhci_arasan->phy); 23591aa3661SShawn Lin err_phy_power: 23691aa3661SShawn Lin if (!IS_ERR(sdhci_arasan->phy)) 23791aa3661SShawn Lin phy_exit(sdhci_arasan->phy); 238e3ec3a3dSSoren Brinkmann clk_disable_all: 239e3ec3a3dSSoren Brinkmann clk_disable_unprepare(clk_xin); 240e3ec3a3dSSoren Brinkmann clk_dis_ahb: 241e3ec3a3dSSoren Brinkmann clk_disable_unprepare(sdhci_arasan->clk_ahb); 242278d0962SShawn Lin err_pltfm_free: 243278d0962SShawn Lin sdhci_pltfm_free(pdev); 244e3ec3a3dSSoren Brinkmann return ret; 245e3ec3a3dSSoren Brinkmann } 246e3ec3a3dSSoren Brinkmann 247e3ec3a3dSSoren Brinkmann static int sdhci_arasan_remove(struct platform_device *pdev) 248e3ec3a3dSSoren Brinkmann { 2490c7fe32eSJisheng Zhang int ret; 250e3ec3a3dSSoren Brinkmann struct sdhci_host *host = platform_get_drvdata(pdev); 251e3ec3a3dSSoren Brinkmann struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); 25289211418SJisheng Zhang struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host); 25389211418SJisheng Zhang struct clk *clk_ahb = sdhci_arasan->clk_ahb; 254e3ec3a3dSSoren Brinkmann 25591aa3661SShawn Lin if (!IS_ERR(sdhci_arasan->phy)) { 25691aa3661SShawn Lin phy_power_off(sdhci_arasan->phy); 25791aa3661SShawn Lin phy_exit(sdhci_arasan->phy); 25891aa3661SShawn Lin } 25991aa3661SShawn Lin 2600c7fe32eSJisheng Zhang ret = sdhci_pltfm_unregister(pdev); 2610c7fe32eSJisheng Zhang 26289211418SJisheng Zhang clk_disable_unprepare(clk_ahb); 263e3ec3a3dSSoren Brinkmann 2640c7fe32eSJisheng Zhang return ret; 265e3ec3a3dSSoren Brinkmann } 266e3ec3a3dSSoren Brinkmann 267e3ec3a3dSSoren Brinkmann static const struct of_device_id sdhci_arasan_of_match[] = { 268e3ec3a3dSSoren Brinkmann { .compatible = "arasan,sdhci-8.9a" }, 269da795ec2SShawn Lin { .compatible = "arasan,sdhci-5.1" }, 270308f3f8dSSuman Tripathi { .compatible = "arasan,sdhci-4.9a" }, 271e3ec3a3dSSoren Brinkmann { } 272e3ec3a3dSSoren Brinkmann }; 273e3ec3a3dSSoren Brinkmann MODULE_DEVICE_TABLE(of, sdhci_arasan_of_match); 274e3ec3a3dSSoren Brinkmann 275e3ec3a3dSSoren Brinkmann static struct platform_driver sdhci_arasan_driver = { 276e3ec3a3dSSoren Brinkmann .driver = { 277e3ec3a3dSSoren Brinkmann .name = "sdhci-arasan", 278e3ec3a3dSSoren Brinkmann .of_match_table = sdhci_arasan_of_match, 279e3ec3a3dSSoren Brinkmann .pm = &sdhci_arasan_dev_pm_ops, 280e3ec3a3dSSoren Brinkmann }, 281e3ec3a3dSSoren Brinkmann .probe = sdhci_arasan_probe, 282e3ec3a3dSSoren Brinkmann .remove = sdhci_arasan_remove, 283e3ec3a3dSSoren Brinkmann }; 284e3ec3a3dSSoren Brinkmann 285e3ec3a3dSSoren Brinkmann module_platform_driver(sdhci_arasan_driver); 286e3ec3a3dSSoren Brinkmann 287e3ec3a3dSSoren Brinkmann MODULE_DESCRIPTION("Driver for the Arasan SDHCI Controller"); 288e3ec3a3dSSoren Brinkmann MODULE_AUTHOR("Soeren Brinkmann <soren.brinkmann@xilinx.com>"); 289e3ec3a3dSSoren Brinkmann MODULE_LICENSE("GPL"); 290