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cbdfb426 IM |
1 | /* |
2 | * Toshiba TC6387XB support | |
3 | * Copyright (c) 2005 Ian Molton | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License version 2 as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This file contains TC6387XB base support. | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <linux/module.h> | |
14 | #include <linux/platform_device.h> | |
7acb706c | 15 | #include <linux/clk.h> |
cbdfb426 IM |
16 | #include <linux/err.h> |
17 | #include <linux/mfd/core.h> | |
18 | #include <linux/mfd/tmio.h> | |
19 | #include <linux/mfd/tc6387xb.h> | |
20 | ||
d2432a63 IM |
21 | enum { |
22 | TC6387XB_CELL_MMC, | |
23 | }; | |
24 | ||
cbdfb426 IM |
25 | #ifdef CONFIG_PM |
26 | static int tc6387xb_suspend(struct platform_device *dev, pm_message_t state) | |
27 | { | |
7acb706c IM |
28 | struct clk *clk32k = platform_get_drvdata(dev); |
29 | struct tc6387xb_platform_data *pdata = dev->dev.platform_data; | |
cbdfb426 IM |
30 | |
31 | if (pdata && pdata->suspend) | |
32 | pdata->suspend(dev); | |
7acb706c | 33 | clk_disable(clk32k); |
cbdfb426 IM |
34 | |
35 | return 0; | |
36 | } | |
37 | ||
38 | static int tc6387xb_resume(struct platform_device *dev) | |
39 | { | |
7acb706c IM |
40 | struct clk *clk32k = platform_get_drvdata(dev); |
41 | struct tc6387xb_platform_data *pdata = dev->dev.platform_data; | |
cbdfb426 | 42 | |
7acb706c | 43 | clk_enable(clk32k); |
cbdfb426 IM |
44 | if (pdata && pdata->resume) |
45 | pdata->resume(dev); | |
46 | ||
47 | return 0; | |
48 | } | |
49 | #else | |
50 | #define tc6387xb_suspend NULL | |
51 | #define tc6387xb_resume NULL | |
52 | #endif | |
53 | ||
54 | /*--------------------------------------------------------------------------*/ | |
55 | ||
56 | static int tc6387xb_mmc_enable(struct platform_device *mmc) | |
57 | { | |
58 | struct platform_device *dev = to_platform_device(mmc->dev.parent); | |
7acb706c | 59 | struct clk *clk32k = platform_get_drvdata(dev); |
cbdfb426 | 60 | |
7acb706c | 61 | clk_enable(clk32k); |
cbdfb426 IM |
62 | |
63 | return 0; | |
64 | } | |
65 | ||
66 | static int tc6387xb_mmc_disable(struct platform_device *mmc) | |
67 | { | |
68 | struct platform_device *dev = to_platform_device(mmc->dev.parent); | |
7acb706c | 69 | struct clk *clk32k = platform_get_drvdata(dev); |
cbdfb426 | 70 | |
7acb706c | 71 | clk_disable(clk32k); |
cbdfb426 IM |
72 | |
73 | return 0; | |
74 | } | |
75 | ||
76 | /*--------------------------------------------------------------------------*/ | |
77 | ||
78 | static struct resource tc6387xb_mmc_resources[] = { | |
79 | { | |
80 | .start = 0x800, | |
81 | .end = 0x9ff, | |
82 | .flags = IORESOURCE_MEM, | |
83 | }, | |
84 | { | |
85 | .start = 0x200, | |
86 | .end = 0x2ff, | |
87 | .flags = IORESOURCE_MEM, | |
88 | }, | |
89 | { | |
90 | .start = 0, | |
91 | .end = 0, | |
92 | .flags = IORESOURCE_IRQ, | |
93 | }, | |
94 | }; | |
95 | ||
96 | static struct mfd_cell tc6387xb_cells[] = { | |
d2432a63 | 97 | [TC6387XB_CELL_MMC] = { |
cbdfb426 IM |
98 | .name = "tmio-mmc", |
99 | .enable = tc6387xb_mmc_enable, | |
100 | .disable = tc6387xb_mmc_disable, | |
101 | .num_resources = ARRAY_SIZE(tc6387xb_mmc_resources), | |
102 | .resources = tc6387xb_mmc_resources, | |
103 | }, | |
104 | }; | |
105 | ||
106 | static int tc6387xb_probe(struct platform_device *dev) | |
107 | { | |
7acb706c | 108 | struct tc6387xb_platform_data *pdata = dev->dev.platform_data; |
cbdfb426 | 109 | struct resource *iomem; |
7acb706c | 110 | struct clk *clk32k; |
cbdfb426 IM |
111 | int irq, ret; |
112 | ||
113 | iomem = platform_get_resource(dev, IORESOURCE_MEM, 0); | |
114 | if (!iomem) { | |
7acb706c | 115 | return -EINVAL; |
cbdfb426 IM |
116 | } |
117 | ||
118 | ret = platform_get_irq(dev, 0); | |
119 | if (ret >= 0) | |
120 | irq = ret; | |
121 | else | |
122 | goto err_resource; | |
123 | ||
7acb706c IM |
124 | clk32k = clk_get(&dev->dev, "CLK_CK32K"); |
125 | if (IS_ERR(clk32k)) { | |
126 | ret = PTR_ERR(clk32k); | |
127 | goto err_resource; | |
128 | } | |
129 | platform_set_drvdata(dev, clk32k); | |
130 | ||
131 | if (pdata && pdata->enable) | |
132 | pdata->enable(dev); | |
cbdfb426 IM |
133 | |
134 | printk(KERN_INFO "Toshiba tc6387xb initialised\n"); | |
135 | ||
d2432a63 IM |
136 | tc6387xb_cells[TC6387XB_CELL_MMC].platform_data = |
137 | &tc6387xb_cells[TC6387XB_CELL_MMC]; | |
138 | tc6387xb_cells[TC6387XB_CELL_MMC].data_size = | |
139 | sizeof(tc6387xb_cells[TC6387XB_CELL_MMC]); | |
140 | ||
56bf2bda SO |
141 | ret = mfd_add_devices(&dev->dev, dev->id, tc6387xb_cells, |
142 | ARRAY_SIZE(tc6387xb_cells), iomem, irq); | |
cbdfb426 IM |
143 | |
144 | if (!ret) | |
145 | return 0; | |
146 | ||
7acb706c | 147 | clk_put(clk32k); |
cbdfb426 IM |
148 | err_resource: |
149 | return ret; | |
150 | } | |
151 | ||
152 | static int tc6387xb_remove(struct platform_device *dev) | |
153 | { | |
7acb706c | 154 | struct clk *clk32k = platform_get_drvdata(dev); |
cbdfb426 | 155 | |
7acb706c IM |
156 | mfd_remove_devices(&dev->dev); |
157 | clk_disable(clk32k); | |
158 | clk_put(clk32k); | |
159 | platform_set_drvdata(dev, NULL); | |
cbdfb426 IM |
160 | |
161 | return 0; | |
162 | } | |
163 | ||
164 | ||
165 | static struct platform_driver tc6387xb_platform_driver = { | |
166 | .driver = { | |
167 | .name = "tc6387xb", | |
168 | }, | |
169 | .probe = tc6387xb_probe, | |
170 | .remove = tc6387xb_remove, | |
171 | .suspend = tc6387xb_suspend, | |
172 | .resume = tc6387xb_resume, | |
173 | }; | |
174 | ||
175 | ||
176 | static int __init tc6387xb_init(void) | |
177 | { | |
178 | return platform_driver_register(&tc6387xb_platform_driver); | |
179 | } | |
180 | ||
181 | static void __exit tc6387xb_exit(void) | |
182 | { | |
183 | platform_driver_unregister(&tc6387xb_platform_driver); | |
184 | } | |
185 | ||
186 | module_init(tc6387xb_init); | |
187 | module_exit(tc6387xb_exit); | |
188 | ||
189 | MODULE_DESCRIPTION("Toshiba TC6387XB core driver"); | |
190 | MODULE_LICENSE("GPL v2"); | |
191 | MODULE_AUTHOR("Ian Molton"); | |
192 | MODULE_ALIAS("platform:tc6387xb"); |