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Magnus Damma87d5632009-10-02 02:22:09 +00001/*
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 Heo5a0e3ad2010-03-24 17:04:11 +090023#include <linux/slab.h>
Magnus Damma87d5632009-10-02 02:22:09 +000024#include <linux/platform_device.h>
Magnus Damm3c49e812010-02-22 13:37:09 +090025#include <linux/mmc/host.h>
Magnus Damma87d5632009-10-02 02:22:09 +000026#include <linux/mfd/core.h>
27#include <linux/mfd/tmio.h>
Magnus Dammbe9cd7b2009-11-27 04:31:27 +000028#include <linux/mfd/sh_mobile_sdhi.h>
Guennadi Liakhovetski056676d2010-05-19 18:34:16 +000029#include <linux/sh_dma.h>
Magnus Damma87d5632009-10-02 02:22:09 +000030
31struct sh_mobile_sdhi {
32 struct clk *clk;
33 struct tmio_mmc_data mmc_data;
34 struct mfd_cell cell_mmc;
Guennadi Liakhovetski056676d2010-05-19 18:34:16 +000035 struct sh_dmae_slave param_tx;
36 struct sh_dmae_slave param_rx;
37 struct tmio_mmc_dma dma_priv;
Magnus Damma87d5632009-10-02 02:22:09 +000038};
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
Magnus Dammbe9cd7b2009-11-27 04:31:27 +000059static 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
Arnd Hannemann998283e2010-08-24 17:27:00 +020068static int sh_mobile_sdhi_get_cd(struct platform_device *tmio)
69{
70 struct platform_device *pdev = to_platform_device(tmio->dev.parent);
71 struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
72
73 if (p && p->get_cd)
74 return p->get_cd(pdev);
75 else
76 return -ENOSYS;
77}
78
Paul Mundt25ab9982010-09-16 17:14:40 +090079static int __devinit sh_mobile_sdhi_probe(struct platform_device *pdev)
Magnus Damma87d5632009-10-02 02:22:09 +000080{
81 struct sh_mobile_sdhi *priv;
Guennadi Liakhovetski056676d2010-05-19 18:34:16 +000082 struct tmio_mmc_data *mmc_data;
83 struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
Magnus Damma87d5632009-10-02 02:22:09 +000084 struct resource *mem;
85 char clk_name[8];
86 int ret, irq;
87
88 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
89 if (!mem)
90 dev_err(&pdev->dev, "missing MEM resource\n");
91
92 irq = platform_get_irq(pdev, 0);
93 if (irq < 0)
94 dev_err(&pdev->dev, "missing IRQ resource\n");
95
96 if (!mem || (irq < 0))
97 return -EINVAL;
98
99 priv = kzalloc(sizeof(struct sh_mobile_sdhi), GFP_KERNEL);
100 if (priv == NULL) {
101 dev_err(&pdev->dev, "kzalloc failed\n");
102 return -ENOMEM;
103 }
104
Guennadi Liakhovetski056676d2010-05-19 18:34:16 +0000105 mmc_data = &priv->mmc_data;
106
Magnus Damma87d5632009-10-02 02:22:09 +0000107 snprintf(clk_name, sizeof(clk_name), "sdhi%d", pdev->id);
108 priv->clk = clk_get(&pdev->dev, clk_name);
109 if (IS_ERR(priv->clk)) {
110 dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
111 ret = PTR_ERR(priv->clk);
112 kfree(priv);
113 return ret;
114 }
115
116 clk_enable(priv->clk);
117
Guennadi Liakhovetski056676d2010-05-19 18:34:16 +0000118 mmc_data->hclk = clk_get_rate(priv->clk);
119 mmc_data->set_pwr = sh_mobile_sdhi_set_pwr;
Arnd Hannemann998283e2010-08-24 17:27:00 +0200120 mmc_data->get_cd = sh_mobile_sdhi_get_cd;
Guennadi Liakhovetski056676d2010-05-19 18:34:16 +0000121 mmc_data->capabilities = MMC_CAP_MMC_HIGHSPEED;
Guennadi Liakhovetskibb0fe532010-05-19 18:37:36 +0000122 if (p) {
Guennadi Liakhovetskif87c20a2010-05-19 18:36:08 +0000123 mmc_data->flags = p->tmio_flags;
Guennadi Liakhovetskibb0fe532010-05-19 18:37:36 +0000124 mmc_data->ocr_mask = p->tmio_ocr_mask;
Arnd Hannemann998283e2010-08-24 17:27:00 +0200125 mmc_data->capabilities |= p->tmio_caps;
Guennadi Liakhovetskibb0fe532010-05-19 18:37:36 +0000126 }
Guennadi Liakhovetski056676d2010-05-19 18:34:16 +0000127
Yusuke Godaf1334fb2010-08-30 11:50:19 +0100128 /*
129 * All SDHI blocks support 2-byte and larger block sizes in 4-bit
130 * bus width mode.
131 */
132 mmc_data->flags |= TMIO_MMC_BLKSZ_2BYTES;
133
Arnd Hannemann23b66072010-12-28 23:22:32 +0100134 /*
135 * All SDHI blocks support SDIO IRQ signalling.
136 */
137 mmc_data->flags |= TMIO_MMC_SDIO_IRQ;
138
Guennadi Liakhovetski056676d2010-05-19 18:34:16 +0000139 if (p && p->dma_slave_tx >= 0 && p->dma_slave_rx >= 0) {
140 priv->param_tx.slave_id = p->dma_slave_tx;
141 priv->param_rx.slave_id = p->dma_slave_rx;
142 priv->dma_priv.chan_priv_tx = &priv->param_tx;
143 priv->dma_priv.chan_priv_rx = &priv->param_rx;
Guennadi Liakhovetski39a65a02010-11-23 17:24:19 +0100144 priv->dma_priv.alignment_shift = 1; /* 2-byte alignment */
Guennadi Liakhovetski056676d2010-05-19 18:34:16 +0000145 mmc_data->dma = &priv->dma_priv;
146 }
Magnus Damma87d5632009-10-02 02:22:09 +0000147
148 memcpy(&priv->cell_mmc, &sh_mobile_sdhi_cell, sizeof(priv->cell_mmc));
Guennadi Liakhovetski056676d2010-05-19 18:34:16 +0000149 priv->cell_mmc.driver_data = mmc_data;
Magnus Damma87d5632009-10-02 02:22:09 +0000150 priv->cell_mmc.platform_data = &priv->cell_mmc;
151 priv->cell_mmc.data_size = sizeof(priv->cell_mmc);
152
153 platform_set_drvdata(pdev, priv);
154
155 ret = mfd_add_devices(&pdev->dev, pdev->id,
156 &priv->cell_mmc, 1, mem, irq);
157 if (ret) {
158 clk_disable(priv->clk);
159 clk_put(priv->clk);
160 kfree(priv);
161 }
162
163 return ret;
164}
165
166static int sh_mobile_sdhi_remove(struct platform_device *pdev)
167{
168 struct sh_mobile_sdhi *priv = platform_get_drvdata(pdev);
169
170 mfd_remove_devices(&pdev->dev);
171 clk_disable(priv->clk);
172 clk_put(priv->clk);
173 kfree(priv);
174
175 return 0;
176}
177
178static struct platform_driver sh_mobile_sdhi_driver = {
179 .driver = {
180 .name = "sh_mobile_sdhi",
181 .owner = THIS_MODULE,
182 },
183 .probe = sh_mobile_sdhi_probe,
184 .remove = __devexit_p(sh_mobile_sdhi_remove),
185};
186
187static int __init sh_mobile_sdhi_init(void)
188{
189 return platform_driver_register(&sh_mobile_sdhi_driver);
190}
191
192static void __exit sh_mobile_sdhi_exit(void)
193{
194 platform_driver_unregister(&sh_mobile_sdhi_driver);
195}
196
197module_init(sh_mobile_sdhi_init);
198module_exit(sh_mobile_sdhi_exit);
199
200MODULE_DESCRIPTION("SuperH Mobile SDHI driver");
201MODULE_AUTHOR("Magnus Damm");
202MODULE_LICENSE("GPL v2");