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a87d5638 MD |
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> | |
5a0e3ad6 | 23 | #include <linux/slab.h> |
a87d5638 | 24 | #include <linux/platform_device.h> |
3c49e810 | 25 | #include <linux/mmc/host.h> |
a87d5638 MD |
26 | #include <linux/mfd/core.h> |
27 | #include <linux/mfd/tmio.h> | |
be9cd7b6 | 28 | #include <linux/mfd/sh_mobile_sdhi.h> |
a87d5638 MD |
29 | |
30 | struct sh_mobile_sdhi { | |
31 | struct clk *clk; | |
32 | struct tmio_mmc_data mmc_data; | |
33 | struct mfd_cell cell_mmc; | |
34 | }; | |
35 | ||
36 | static struct resource sh_mobile_sdhi_resources[] = { | |
37 | { | |
38 | .start = 0x000, | |
39 | .end = 0x1ff, | |
40 | .flags = IORESOURCE_MEM, | |
41 | }, | |
42 | { | |
43 | .start = 0, | |
44 | .end = 0, | |
45 | .flags = IORESOURCE_IRQ, | |
46 | }, | |
47 | }; | |
48 | ||
49 | static struct mfd_cell sh_mobile_sdhi_cell = { | |
50 | .name = "tmio-mmc", | |
51 | .num_resources = ARRAY_SIZE(sh_mobile_sdhi_resources), | |
52 | .resources = sh_mobile_sdhi_resources, | |
53 | }; | |
54 | ||
be9cd7b6 MD |
55 | static void sh_mobile_sdhi_set_pwr(struct platform_device *tmio, int state) |
56 | { | |
57 | struct platform_device *pdev = to_platform_device(tmio->dev.parent); | |
58 | struct sh_mobile_sdhi_info *p = pdev->dev.platform_data; | |
59 | ||
60 | if (p && p->set_pwr) | |
61 | p->set_pwr(pdev, state); | |
62 | } | |
63 | ||
a87d5638 MD |
64 | static int __init sh_mobile_sdhi_probe(struct platform_device *pdev) |
65 | { | |
66 | struct sh_mobile_sdhi *priv; | |
67 | struct resource *mem; | |
68 | char clk_name[8]; | |
69 | int ret, irq; | |
70 | ||
71 | mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
72 | if (!mem) | |
73 | dev_err(&pdev->dev, "missing MEM resource\n"); | |
74 | ||
75 | irq = platform_get_irq(pdev, 0); | |
76 | if (irq < 0) | |
77 | dev_err(&pdev->dev, "missing IRQ resource\n"); | |
78 | ||
79 | if (!mem || (irq < 0)) | |
80 | return -EINVAL; | |
81 | ||
82 | priv = kzalloc(sizeof(struct sh_mobile_sdhi), GFP_KERNEL); | |
83 | if (priv == NULL) { | |
84 | dev_err(&pdev->dev, "kzalloc failed\n"); | |
85 | return -ENOMEM; | |
86 | } | |
87 | ||
88 | snprintf(clk_name, sizeof(clk_name), "sdhi%d", pdev->id); | |
89 | priv->clk = clk_get(&pdev->dev, clk_name); | |
90 | if (IS_ERR(priv->clk)) { | |
91 | dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name); | |
92 | ret = PTR_ERR(priv->clk); | |
93 | kfree(priv); | |
94 | return ret; | |
95 | } | |
96 | ||
97 | clk_enable(priv->clk); | |
98 | ||
3c49e810 | 99 | priv->mmc_data.hclk = clk_get_rate(priv->clk); |
be9cd7b6 | 100 | priv->mmc_data.set_pwr = sh_mobile_sdhi_set_pwr; |
3c49e810 | 101 | priv->mmc_data.capabilities = MMC_CAP_MMC_HIGHSPEED; |
a87d5638 MD |
102 | |
103 | memcpy(&priv->cell_mmc, &sh_mobile_sdhi_cell, sizeof(priv->cell_mmc)); | |
104 | priv->cell_mmc.driver_data = &priv->mmc_data; | |
105 | priv->cell_mmc.platform_data = &priv->cell_mmc; | |
106 | priv->cell_mmc.data_size = sizeof(priv->cell_mmc); | |
107 | ||
108 | platform_set_drvdata(pdev, priv); | |
109 | ||
110 | ret = mfd_add_devices(&pdev->dev, pdev->id, | |
111 | &priv->cell_mmc, 1, mem, irq); | |
112 | if (ret) { | |
113 | clk_disable(priv->clk); | |
114 | clk_put(priv->clk); | |
115 | kfree(priv); | |
116 | } | |
117 | ||
118 | return ret; | |
119 | } | |
120 | ||
121 | static int sh_mobile_sdhi_remove(struct platform_device *pdev) | |
122 | { | |
123 | struct sh_mobile_sdhi *priv = platform_get_drvdata(pdev); | |
124 | ||
125 | mfd_remove_devices(&pdev->dev); | |
126 | clk_disable(priv->clk); | |
127 | clk_put(priv->clk); | |
128 | kfree(priv); | |
129 | ||
130 | return 0; | |
131 | } | |
132 | ||
133 | static struct platform_driver sh_mobile_sdhi_driver = { | |
134 | .driver = { | |
135 | .name = "sh_mobile_sdhi", | |
136 | .owner = THIS_MODULE, | |
137 | }, | |
138 | .probe = sh_mobile_sdhi_probe, | |
139 | .remove = __devexit_p(sh_mobile_sdhi_remove), | |
140 | }; | |
141 | ||
142 | static int __init sh_mobile_sdhi_init(void) | |
143 | { | |
144 | return platform_driver_register(&sh_mobile_sdhi_driver); | |
145 | } | |
146 | ||
147 | static void __exit sh_mobile_sdhi_exit(void) | |
148 | { | |
149 | platform_driver_unregister(&sh_mobile_sdhi_driver); | |
150 | } | |
151 | ||
152 | module_init(sh_mobile_sdhi_init); | |
153 | module_exit(sh_mobile_sdhi_exit); | |
154 | ||
155 | MODULE_DESCRIPTION("SuperH Mobile SDHI driver"); | |
156 | MODULE_AUTHOR("Magnus Damm"); | |
157 | MODULE_LICENSE("GPL v2"); |