Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 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> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 23 | #include <linux/slab.h> |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 24 | #include <linux/platform_device.h> |
Magnus Damm | 3c49e81 | 2010-02-22 13:37:09 +0900 | [diff] [blame] | 25 | #include <linux/mmc/host.h> |
Guennadi Liakhovetski | 42051e8 | 2011-03-14 09:52:33 +0100 | [diff] [blame] | 26 | #include <linux/mmc/sh_mobile_sdhi.h> |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 27 | #include <linux/mfd/tmio.h> |
Guennadi Liakhovetski | 056676d | 2010-05-19 18:34:16 +0000 | [diff] [blame] | 28 | #include <linux/sh_dma.h> |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 29 | |
Guennadi Liakhovetski | 42051e8 | 2011-03-14 09:52:33 +0100 | [diff] [blame] | 30 | #include "tmio_mmc.h" |
| 31 | |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 32 | struct sh_mobile_sdhi { |
| 33 | struct clk *clk; |
| 34 | struct tmio_mmc_data mmc_data; |
Guennadi Liakhovetski | 056676d | 2010-05-19 18:34:16 +0000 | [diff] [blame] | 35 | struct sh_dmae_slave param_tx; |
| 36 | struct sh_dmae_slave param_rx; |
| 37 | struct tmio_mmc_dma dma_priv; |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 38 | }; |
| 39 | |
Guennadi Liakhovetski | 42051e8 | 2011-03-14 09:52:33 +0100 | [diff] [blame] | 40 | static void sh_mobile_sdhi_set_pwr(struct platform_device *pdev, int state) |
Magnus Damm | be9cd7b | 2009-11-27 04:31:27 +0000 | [diff] [blame] | 41 | { |
Magnus Damm | be9cd7b | 2009-11-27 04:31:27 +0000 | [diff] [blame] | 42 | struct sh_mobile_sdhi_info *p = pdev->dev.platform_data; |
| 43 | |
| 44 | if (p && p->set_pwr) |
| 45 | p->set_pwr(pdev, state); |
| 46 | } |
| 47 | |
Guennadi Liakhovetski | 42051e8 | 2011-03-14 09:52:33 +0100 | [diff] [blame] | 48 | static int sh_mobile_sdhi_get_cd(struct platform_device *pdev) |
Arnd Hannemann | 998283e | 2010-08-24 17:27:00 +0200 | [diff] [blame] | 49 | { |
Arnd Hannemann | 998283e | 2010-08-24 17:27:00 +0200 | [diff] [blame] | 50 | struct sh_mobile_sdhi_info *p = pdev->dev.platform_data; |
| 51 | |
| 52 | if (p && p->get_cd) |
| 53 | return p->get_cd(pdev); |
| 54 | else |
| 55 | return -ENOSYS; |
| 56 | } |
| 57 | |
Paul Mundt | 25ab998 | 2010-09-16 17:14:40 +0900 | [diff] [blame] | 58 | static int __devinit sh_mobile_sdhi_probe(struct platform_device *pdev) |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 59 | { |
| 60 | struct sh_mobile_sdhi *priv; |
Guennadi Liakhovetski | 056676d | 2010-05-19 18:34:16 +0000 | [diff] [blame] | 61 | struct tmio_mmc_data *mmc_data; |
| 62 | struct sh_mobile_sdhi_info *p = pdev->dev.platform_data; |
Guennadi Liakhovetski | 42051e8 | 2011-03-14 09:52:33 +0100 | [diff] [blame] | 63 | struct tmio_mmc_host *host; |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 64 | char clk_name[8]; |
Magnus Damm | d6a1f86 | 2011-05-06 11:02:45 +0000 | [diff] [blame] | 65 | int i, irq, ret; |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 66 | |
| 67 | priv = kzalloc(sizeof(struct sh_mobile_sdhi), GFP_KERNEL); |
| 68 | if (priv == NULL) { |
| 69 | dev_err(&pdev->dev, "kzalloc failed\n"); |
| 70 | return -ENOMEM; |
| 71 | } |
| 72 | |
Guennadi Liakhovetski | 056676d | 2010-05-19 18:34:16 +0000 | [diff] [blame] | 73 | mmc_data = &priv->mmc_data; |
Guennadi Liakhovetski | 2595880 | 2011-05-11 16:51:15 +0000 | [diff] [blame] | 74 | p->pdata = mmc_data; |
Guennadi Liakhovetski | 056676d | 2010-05-19 18:34:16 +0000 | [diff] [blame] | 75 | |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 76 | snprintf(clk_name, sizeof(clk_name), "sdhi%d", pdev->id); |
| 77 | priv->clk = clk_get(&pdev->dev, clk_name); |
| 78 | if (IS_ERR(priv->clk)) { |
| 79 | dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name); |
| 80 | ret = PTR_ERR(priv->clk); |
Guennadi Liakhovetski | 42051e8 | 2011-03-14 09:52:33 +0100 | [diff] [blame] | 81 | goto eclkget; |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 82 | } |
| 83 | |
| 84 | clk_enable(priv->clk); |
| 85 | |
Guennadi Liakhovetski | 056676d | 2010-05-19 18:34:16 +0000 | [diff] [blame] | 86 | mmc_data->hclk = clk_get_rate(priv->clk); |
| 87 | mmc_data->set_pwr = sh_mobile_sdhi_set_pwr; |
Arnd Hannemann | 998283e | 2010-08-24 17:27:00 +0200 | [diff] [blame] | 88 | mmc_data->get_cd = sh_mobile_sdhi_get_cd; |
Guennadi Liakhovetski | 056676d | 2010-05-19 18:34:16 +0000 | [diff] [blame] | 89 | mmc_data->capabilities = MMC_CAP_MMC_HIGHSPEED; |
Guennadi Liakhovetski | bb0fe53 | 2010-05-19 18:37:36 +0000 | [diff] [blame] | 90 | if (p) { |
Guennadi Liakhovetski | f87c20a | 2010-05-19 18:36:08 +0000 | [diff] [blame] | 91 | mmc_data->flags = p->tmio_flags; |
Guennadi Liakhovetski | bb0fe53 | 2010-05-19 18:37:36 +0000 | [diff] [blame] | 92 | mmc_data->ocr_mask = p->tmio_ocr_mask; |
Arnd Hannemann | 998283e | 2010-08-24 17:27:00 +0200 | [diff] [blame] | 93 | mmc_data->capabilities |= p->tmio_caps; |
Guennadi Liakhovetski | 42051e8 | 2011-03-14 09:52:33 +0100 | [diff] [blame] | 94 | |
Guennadi Liakhovetski | 3e71337 | 2011-05-24 12:24:07 +0200 | [diff] [blame^] | 95 | if (p->dma_slave_tx > 0 && p->dma_slave_rx > 0) { |
Guennadi Liakhovetski | 42051e8 | 2011-03-14 09:52:33 +0100 | [diff] [blame] | 96 | priv->param_tx.slave_id = p->dma_slave_tx; |
| 97 | priv->param_rx.slave_id = p->dma_slave_rx; |
| 98 | priv->dma_priv.chan_priv_tx = &priv->param_tx; |
| 99 | priv->dma_priv.chan_priv_rx = &priv->param_rx; |
| 100 | priv->dma_priv.alignment_shift = 1; /* 2-byte alignment */ |
| 101 | mmc_data->dma = &priv->dma_priv; |
| 102 | } |
Guennadi Liakhovetski | bb0fe53 | 2010-05-19 18:37:36 +0000 | [diff] [blame] | 103 | } |
Guennadi Liakhovetski | 056676d | 2010-05-19 18:34:16 +0000 | [diff] [blame] | 104 | |
Yusuke Goda | f1334fb | 2010-08-30 11:50:19 +0100 | [diff] [blame] | 105 | /* |
| 106 | * All SDHI blocks support 2-byte and larger block sizes in 4-bit |
| 107 | * bus width mode. |
| 108 | */ |
| 109 | mmc_data->flags |= TMIO_MMC_BLKSZ_2BYTES; |
| 110 | |
Arnd Hannemann | 23b6607 | 2010-12-28 23:22:32 +0100 | [diff] [blame] | 111 | /* |
| 112 | * All SDHI blocks support SDIO IRQ signalling. |
| 113 | */ |
| 114 | mmc_data->flags |= TMIO_MMC_SDIO_IRQ; |
| 115 | |
Guennadi Liakhovetski | 42051e8 | 2011-03-14 09:52:33 +0100 | [diff] [blame] | 116 | ret = tmio_mmc_host_probe(&host, pdev, mmc_data); |
| 117 | if (ret < 0) |
| 118 | goto eprobe; |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 119 | |
Magnus Damm | d6a1f86 | 2011-05-06 11:02:45 +0000 | [diff] [blame] | 120 | for (i = 0; i < 3; i++) { |
| 121 | irq = platform_get_irq(pdev, i); |
| 122 | if (irq < 0) { |
| 123 | if (i) { |
| 124 | continue; |
| 125 | } else { |
| 126 | ret = irq; |
| 127 | goto eirq; |
| 128 | } |
| 129 | } |
| 130 | ret = request_irq(irq, tmio_mmc_irq, 0, |
| 131 | dev_name(&pdev->dev), host); |
| 132 | if (ret) { |
| 133 | while (i--) { |
| 134 | irq = platform_get_irq(pdev, i); |
| 135 | if (irq >= 0) |
| 136 | free_irq(irq, host); |
| 137 | } |
| 138 | goto eirq; |
| 139 | } |
Magnus Damm | 8e7bfdb | 2011-05-06 11:02:33 +0000 | [diff] [blame] | 140 | } |
Magnus Damm | 1f7d681 | 2011-05-06 11:02:41 +0000 | [diff] [blame] | 141 | dev_info(&pdev->dev, "%s base at 0x%08lx clock rate %u MHz\n", |
| 142 | mmc_hostname(host->mmc), (unsigned long) |
| 143 | (platform_get_resource(pdev,IORESOURCE_MEM, 0)->start), |
| 144 | mmc_data->hclk / 1000000); |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 145 | |
Guennadi Liakhovetski | 42051e8 | 2011-03-14 09:52:33 +0100 | [diff] [blame] | 146 | return ret; |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 147 | |
Magnus Damm | 8e7bfdb | 2011-05-06 11:02:33 +0000 | [diff] [blame] | 148 | eirq: |
| 149 | tmio_mmc_host_remove(host); |
Guennadi Liakhovetski | 42051e8 | 2011-03-14 09:52:33 +0100 | [diff] [blame] | 150 | eprobe: |
| 151 | clk_disable(priv->clk); |
| 152 | clk_put(priv->clk); |
| 153 | eclkget: |
| 154 | kfree(priv); |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 155 | return ret; |
| 156 | } |
| 157 | |
| 158 | static int sh_mobile_sdhi_remove(struct platform_device *pdev) |
| 159 | { |
Guennadi Liakhovetski | 42051e8 | 2011-03-14 09:52:33 +0100 | [diff] [blame] | 160 | struct mmc_host *mmc = platform_get_drvdata(pdev); |
| 161 | struct tmio_mmc_host *host = mmc_priv(mmc); |
| 162 | struct sh_mobile_sdhi *priv = container_of(host->pdata, struct sh_mobile_sdhi, mmc_data); |
Guennadi Liakhovetski | 2595880 | 2011-05-11 16:51:15 +0000 | [diff] [blame] | 163 | struct sh_mobile_sdhi_info *p = pdev->dev.platform_data; |
Magnus Damm | d6a1f86 | 2011-05-06 11:02:45 +0000 | [diff] [blame] | 164 | int i, irq; |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 165 | |
Guennadi Liakhovetski | 2595880 | 2011-05-11 16:51:15 +0000 | [diff] [blame] | 166 | p->pdata = NULL; |
| 167 | |
Guennadi Liakhovetski | 742a0c7 | 2011-05-27 16:54:05 +0200 | [diff] [blame] | 168 | tmio_mmc_host_remove(host); |
| 169 | |
Magnus Damm | d6a1f86 | 2011-05-06 11:02:45 +0000 | [diff] [blame] | 170 | for (i = 0; i < 3; i++) { |
| 171 | irq = platform_get_irq(pdev, i); |
| 172 | if (irq >= 0) |
| 173 | free_irq(irq, host); |
| 174 | } |
| 175 | |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 176 | clk_disable(priv->clk); |
| 177 | clk_put(priv->clk); |
| 178 | kfree(priv); |
| 179 | |
| 180 | return 0; |
| 181 | } |
| 182 | |
Guennadi Liakhovetski | e6ee718 | 2011-05-05 16:13:12 +0000 | [diff] [blame] | 183 | static const struct dev_pm_ops tmio_mmc_dev_pm_ops = { |
| 184 | .suspend = tmio_mmc_host_suspend, |
| 185 | .resume = tmio_mmc_host_resume, |
Guennadi Liakhovetski | 2595880 | 2011-05-11 16:51:15 +0000 | [diff] [blame] | 186 | .runtime_suspend = tmio_mmc_host_runtime_suspend, |
| 187 | .runtime_resume = tmio_mmc_host_runtime_resume, |
Guennadi Liakhovetski | e6ee718 | 2011-05-05 16:13:12 +0000 | [diff] [blame] | 188 | }; |
| 189 | |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 190 | static struct platform_driver sh_mobile_sdhi_driver = { |
| 191 | .driver = { |
| 192 | .name = "sh_mobile_sdhi", |
| 193 | .owner = THIS_MODULE, |
Guennadi Liakhovetski | e6ee718 | 2011-05-05 16:13:12 +0000 | [diff] [blame] | 194 | .pm = &tmio_mmc_dev_pm_ops, |
Magnus Damm | a87d563 | 2009-10-02 02:22:09 +0000 | [diff] [blame] | 195 | }, |
| 196 | .probe = sh_mobile_sdhi_probe, |
| 197 | .remove = __devexit_p(sh_mobile_sdhi_remove), |
| 198 | }; |
| 199 | |
| 200 | static int __init sh_mobile_sdhi_init(void) |
| 201 | { |
| 202 | return platform_driver_register(&sh_mobile_sdhi_driver); |
| 203 | } |
| 204 | |
| 205 | static void __exit sh_mobile_sdhi_exit(void) |
| 206 | { |
| 207 | platform_driver_unregister(&sh_mobile_sdhi_driver); |
| 208 | } |
| 209 | |
| 210 | module_init(sh_mobile_sdhi_init); |
| 211 | module_exit(sh_mobile_sdhi_exit); |
| 212 | |
| 213 | MODULE_DESCRIPTION("SuperH Mobile SDHI driver"); |
| 214 | MODULE_AUTHOR("Magnus Damm"); |
| 215 | MODULE_LICENSE("GPL v2"); |
Guennadi Liakhovetski | 42051e8 | 2011-03-14 09:52:33 +0100 | [diff] [blame] | 216 | MODULE_ALIAS("platform:sh_mobile_sdhi"); |