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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> |
056676da | 29 | #include <linux/sh_dma.h> |
a87d5638 MD |
30 | |
31 | struct sh_mobile_sdhi { | |
32 | struct clk *clk; | |
33 | struct tmio_mmc_data mmc_data; | |
34 | struct mfd_cell cell_mmc; | |
056676da GL |
35 | struct sh_dmae_slave param_tx; |
36 | struct sh_dmae_slave param_rx; | |
37 | struct tmio_mmc_dma dma_priv; | |
a87d5638 MD |
38 | }; |
39 | ||
40 | static 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 | ||
53 | static 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 | ||
be9cd7b6 MD |
59 | static 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 | ||
a87d5638 MD |
68 | static int __init sh_mobile_sdhi_probe(struct platform_device *pdev) |
69 | { | |
70 | struct sh_mobile_sdhi *priv; | |
056676da GL |
71 | struct tmio_mmc_data *mmc_data; |
72 | struct sh_mobile_sdhi_info *p = pdev->dev.platform_data; | |
a87d5638 MD |
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 | ||
056676da GL |
94 | mmc_data = &priv->mmc_data; |
95 | ||
a87d5638 MD |
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 | ||
056676da GL |
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; | |
f87c20a9 GL |
110 | if (p) |
111 | mmc_data->flags = p->tmio_flags; | |
056676da GL |
112 | |
113 | if (p && p->dma_slave_tx >= 0 && p->dma_slave_rx >= 0) { | |
114 | priv->param_tx.slave_id = p->dma_slave_tx; | |
115 | priv->param_rx.slave_id = p->dma_slave_rx; | |
116 | priv->dma_priv.chan_priv_tx = &priv->param_tx; | |
117 | priv->dma_priv.chan_priv_rx = &priv->param_rx; | |
118 | mmc_data->dma = &priv->dma_priv; | |
119 | } | |
a87d5638 MD |
120 | |
121 | memcpy(&priv->cell_mmc, &sh_mobile_sdhi_cell, sizeof(priv->cell_mmc)); | |
056676da | 122 | priv->cell_mmc.driver_data = mmc_data; |
a87d5638 MD |
123 | priv->cell_mmc.platform_data = &priv->cell_mmc; |
124 | priv->cell_mmc.data_size = sizeof(priv->cell_mmc); | |
125 | ||
126 | platform_set_drvdata(pdev, priv); | |
127 | ||
128 | ret = mfd_add_devices(&pdev->dev, pdev->id, | |
129 | &priv->cell_mmc, 1, mem, irq); | |
130 | if (ret) { | |
131 | clk_disable(priv->clk); | |
132 | clk_put(priv->clk); | |
133 | kfree(priv); | |
134 | } | |
135 | ||
136 | return ret; | |
137 | } | |
138 | ||
139 | static int sh_mobile_sdhi_remove(struct platform_device *pdev) | |
140 | { | |
141 | struct sh_mobile_sdhi *priv = platform_get_drvdata(pdev); | |
142 | ||
143 | mfd_remove_devices(&pdev->dev); | |
144 | clk_disable(priv->clk); | |
145 | clk_put(priv->clk); | |
146 | kfree(priv); | |
147 | ||
148 | return 0; | |
149 | } | |
150 | ||
151 | static struct platform_driver sh_mobile_sdhi_driver = { | |
152 | .driver = { | |
153 | .name = "sh_mobile_sdhi", | |
154 | .owner = THIS_MODULE, | |
155 | }, | |
156 | .probe = sh_mobile_sdhi_probe, | |
157 | .remove = __devexit_p(sh_mobile_sdhi_remove), | |
158 | }; | |
159 | ||
160 | static int __init sh_mobile_sdhi_init(void) | |
161 | { | |
162 | return platform_driver_register(&sh_mobile_sdhi_driver); | |
163 | } | |
164 | ||
165 | static void __exit sh_mobile_sdhi_exit(void) | |
166 | { | |
167 | platform_driver_unregister(&sh_mobile_sdhi_driver); | |
168 | } | |
169 | ||
170 | module_init(sh_mobile_sdhi_init); | |
171 | module_exit(sh_mobile_sdhi_exit); | |
172 | ||
173 | MODULE_DESCRIPTION("SuperH Mobile SDHI driver"); | |
174 | MODULE_AUTHOR("Magnus Damm"); | |
175 | MODULE_LICENSE("GPL v2"); |