1/* 2 * SuperH Mobile SDHI 3 * 4 * Copyright (C) 2009 Magnus Damm 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 * 10 * Based on "Compaq ASIC3 support": 11 * 12 * Copyright 2001 Compaq Computer Corporation. 13 * Copyright 2004-2005 Phil Blundell 14 * Copyright 2007-2008 OpenedHand Ltd. 15 * 16 * Authors: Phil Blundell <pb@handhelds.org>, 17 * Samuel Ortiz <sameo@openedhand.com> 18 * 19 */ 20 21#include <linux/kernel.h> 22#include <linux/clk.h> 23#include <linux/slab.h> 24#include <linux/platform_device.h> 25#include <linux/mmc/host.h> 26#include <linux/mfd/core.h> 27#include <linux/mfd/tmio.h> 28#include <linux/mfd/sh_mobile_sdhi.h> 29#include <linux/sh_dma.h> 30 31struct sh_mobile_sdhi { 32 struct clk *clk; 33 struct tmio_mmc_data mmc_data; 34 struct mfd_cell cell_mmc; 35 struct sh_dmae_slave param_tx; 36 struct sh_dmae_slave param_rx; 37 struct tmio_mmc_dma dma_priv; 38}; 39 40static struct resource sh_mobile_sdhi_resources[] = { 41 { 42 .start = 0x000, 43 .end = 0x1ff, 44 .flags = IORESOURCE_MEM, 45 }, 46 { 47 .start = 0, 48 .end = 0, 49 .flags = IORESOURCE_IRQ, 50 }, 51}; 52 53static struct mfd_cell sh_mobile_sdhi_cell = { 54 .name = "tmio-mmc", 55 .num_resources = ARRAY_SIZE(sh_mobile_sdhi_resources), 56 .resources = sh_mobile_sdhi_resources, 57}; 58 59static void sh_mobile_sdhi_set_pwr(struct platform_device *tmio, int state) 60{ 61 struct platform_device *pdev = to_platform_device(tmio->dev.parent); 62 struct sh_mobile_sdhi_info *p = pdev->dev.platform_data; 63 64 if (p && p->set_pwr) 65 p->set_pwr(pdev, state); 66} 67 68static int __init sh_mobile_sdhi_probe(struct platform_device *pdev) 69{ 70 struct sh_mobile_sdhi *priv; 71 struct tmio_mmc_data *mmc_data; 72 struct sh_mobile_sdhi_info *p = pdev->dev.platform_data; 73 struct resource *mem; 74 char clk_name[8]; 75 int ret, irq; 76 77 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 78 if (!mem) 79 dev_err(&pdev->dev, "missing MEM resource\n"); 80 81 irq = platform_get_irq(pdev, 0); 82 if (irq < 0) 83 dev_err(&pdev->dev, "missing IRQ resource\n"); 84 85 if (!mem || (irq < 0)) 86 return -EINVAL; 87 88 priv = kzalloc(sizeof(struct sh_mobile_sdhi), GFP_KERNEL); 89 if (priv == NULL) { 90 dev_err(&pdev->dev, "kzalloc failed\n"); 91 return -ENOMEM; 92 } 93 94 mmc_data = &priv->mmc_data; 95 96 snprintf(clk_name, sizeof(clk_name), "sdhi%d", pdev->id); 97 priv->clk = clk_get(&pdev->dev, clk_name); 98 if (IS_ERR(priv->clk)) { 99 dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name); 100 ret = PTR_ERR(priv->clk); 101 kfree(priv); 102 return ret; 103 } 104 105 clk_enable(priv->clk); 106 107 mmc_data->hclk = clk_get_rate(priv->clk); 108 mmc_data->set_pwr = sh_mobile_sdhi_set_pwr; 109 mmc_data->capabilities = MMC_CAP_MMC_HIGHSPEED; 110 if (p) { 111 mmc_data->flags = p->tmio_flags; 112 mmc_data->ocr_mask = p->tmio_ocr_mask; 113 } 114 115 if (p && p->dma_slave_tx >= 0 && p->dma_slave_rx >= 0) { 116 priv->param_tx.slave_id = p->dma_slave_tx; 117 priv->param_rx.slave_id = p->dma_slave_rx; 118 priv->dma_priv.chan_priv_tx = &priv->param_tx; 119 priv->dma_priv.chan_priv_rx = &priv->param_rx; 120 mmc_data->dma = &priv->dma_priv; 121 } 122 123 memcpy(&priv->cell_mmc, &sh_mobile_sdhi_cell, sizeof(priv->cell_mmc)); 124 priv->cell_mmc.driver_data = mmc_data; 125 priv->cell_mmc.platform_data = &priv->cell_mmc; 126 priv->cell_mmc.data_size = sizeof(priv->cell_mmc); 127 128 platform_set_drvdata(pdev, priv); 129 130 ret = mfd_add_devices(&pdev->dev, pdev->id, 131 &priv->cell_mmc, 1, mem, irq); 132 if (ret) { 133 clk_disable(priv->clk); 134 clk_put(priv->clk); 135 kfree(priv); 136 } 137 138 return ret; 139} 140 141static int sh_mobile_sdhi_remove(struct platform_device *pdev) 142{ 143 struct sh_mobile_sdhi *priv = platform_get_drvdata(pdev); 144 145 mfd_remove_devices(&pdev->dev); 146 clk_disable(priv->clk); 147 clk_put(priv->clk); 148 kfree(priv); 149 150 return 0; 151} 152 153static struct platform_driver sh_mobile_sdhi_driver = { 154 .driver = { 155 .name = "sh_mobile_sdhi", 156 .owner = THIS_MODULE, 157 }, 158 .probe = sh_mobile_sdhi_probe, 159 .remove = __devexit_p(sh_mobile_sdhi_remove), 160}; 161 162static int __init sh_mobile_sdhi_init(void) 163{ 164 return platform_driver_register(&sh_mobile_sdhi_driver); 165} 166 167static void __exit sh_mobile_sdhi_exit(void) 168{ 169 platform_driver_unregister(&sh_mobile_sdhi_driver); 170} 171 172module_init(sh_mobile_sdhi_init); 173module_exit(sh_mobile_sdhi_exit); 174 175MODULE_DESCRIPTION("SuperH Mobile SDHI driver"); 176MODULE_AUTHOR("Magnus Damm"); 177MODULE_LICENSE("GPL v2"); 178