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>
15 #include <linux/clk.h>
16 #include <linux/err.h>
17 #include <linux/mfd/core.h>
18 #include <linux/mfd/tmio.h>
19 #include <linux/mfd/tc6387xb.h>
20
21 enum {
22 TC6387XB_CELL_MMC,
23 };
24
25 #ifdef CONFIG_PM
26 static int tc6387xb_suspend(struct platform_device *dev, pm_message_t state)
27 {
28 struct clk *clk32k = platform_get_drvdata(dev);
29 struct tc6387xb_platform_data *pdata = dev->dev.platform_data;
30
31 if (pdata && pdata->suspend)
32 pdata->suspend(dev);
33 clk_disable(clk32k);
34
35 return 0;
36 }
37
38 static int tc6387xb_resume(struct platform_device *dev)
39 {
40 struct clk *clk32k = platform_get_drvdata(dev);
41 struct tc6387xb_platform_data *pdata = dev->dev.platform_data;
42
43 clk_enable(clk32k);
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);
59 struct clk *clk32k = platform_get_drvdata(dev);
60
61 clk_enable(clk32k);
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);
69 struct clk *clk32k = platform_get_drvdata(dev);
70
71 clk_disable(clk32k);
72
73 return 0;
74 }
75
76 /*--------------------------------------------------------------------------*/
77
78 static struct tmio_mmc_data tc6387xb_mmc_data = {
79 .hclk = 24000000,
80 };
81
82 static struct resource tc6387xb_mmc_resources[] = {
83 {
84 .start = 0x800,
85 .end = 0x9ff,
86 .flags = IORESOURCE_MEM,
87 },
88 {
89 .start = 0x200,
90 .end = 0x2ff,
91 .flags = IORESOURCE_MEM,
92 },
93 {
94 .start = 0,
95 .end = 0,
96 .flags = IORESOURCE_IRQ,
97 },
98 };
99
100 static struct mfd_cell tc6387xb_cells[] = {
101 [TC6387XB_CELL_MMC] = {
102 .name = "tmio-mmc",
103 .enable = tc6387xb_mmc_enable,
104 .disable = tc6387xb_mmc_disable,
105 .driver_data = &tc6387xb_mmc_data,
106 .num_resources = ARRAY_SIZE(tc6387xb_mmc_resources),
107 .resources = tc6387xb_mmc_resources,
108 },
109 };
110
111 static int tc6387xb_probe(struct platform_device *dev)
112 {
113 struct tc6387xb_platform_data *pdata = dev->dev.platform_data;
114 struct resource *iomem;
115 struct clk *clk32k;
116 int irq, ret;
117
118 iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);
119 if (!iomem) {
120 return -EINVAL;
121 }
122
123 ret = platform_get_irq(dev, 0);
124 if (ret >= 0)
125 irq = ret;
126 else
127 goto err_resource;
128
129 clk32k = clk_get(&dev->dev, "CLK_CK32K");
130 if (IS_ERR(clk32k)) {
131 ret = PTR_ERR(clk32k);
132 goto err_resource;
133 }
134 platform_set_drvdata(dev, clk32k);
135
136 if (pdata && pdata->enable)
137 pdata->enable(dev);
138
139 printk(KERN_INFO "Toshiba tc6387xb initialised\n");
140
141 tc6387xb_cells[TC6387XB_CELL_MMC].platform_data =
142 &tc6387xb_cells[TC6387XB_CELL_MMC];
143 tc6387xb_cells[TC6387XB_CELL_MMC].data_size =
144 sizeof(tc6387xb_cells[TC6387XB_CELL_MMC]);
145
146 ret = mfd_add_devices(&dev->dev, dev->id, tc6387xb_cells,
147 ARRAY_SIZE(tc6387xb_cells), iomem, irq);
148
149 if (!ret)
150 return 0;
151
152 clk_put(clk32k);
153 err_resource:
154 return ret;
155 }
156
157 static int tc6387xb_remove(struct platform_device *dev)
158 {
159 struct clk *clk32k = platform_get_drvdata(dev);
160
161 mfd_remove_devices(&dev->dev);
162 clk_disable(clk32k);
163 clk_put(clk32k);
164 platform_set_drvdata(dev, NULL);
165
166 return 0;
167 }
168
169
170 static struct platform_driver tc6387xb_platform_driver = {
171 .driver = {
172 .name = "tc6387xb",
173 },
174 .probe = tc6387xb_probe,
175 .remove = tc6387xb_remove,
176 .suspend = tc6387xb_suspend,
177 .resume = tc6387xb_resume,
178 };
179
180
181 static int __init tc6387xb_init(void)
182 {
183 return platform_driver_register(&tc6387xb_platform_driver);
184 }
185
186 static void __exit tc6387xb_exit(void)
187 {
188 platform_driver_unregister(&tc6387xb_platform_driver);
189 }
190
191 module_init(tc6387xb_init);
192 module_exit(tc6387xb_exit);
193
194 MODULE_DESCRIPTION("Toshiba TC6387XB core driver");
195 MODULE_LICENSE("GPL v2");
196 MODULE_AUTHOR("Ian Molton");
197 MODULE_ALIAS("platform:tc6387xb");
198
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