mmc: Use device platform_data to retrieve tmio_mmc platform bits
[linux-2.6.git] / drivers / mfd / tc6387xb.c
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 #include <linux/slab.h>
21
22 enum {
23         TC6387XB_CELL_MMC,
24 };
25
26 struct tc6387xb {
27         void __iomem *scr;
28         struct clk *clk32k;
29         struct resource rscr;
30 };
31
32 static struct resource tc6387xb_mmc_resources[] = {
33         {
34                 .start = 0x800,
35                 .end   = 0x9ff,
36                 .flags = IORESOURCE_MEM,
37         },
38         {
39                 .start = 0,
40                 .end   = 0,
41                 .flags = IORESOURCE_IRQ,
42         },
43 };
44
45 /*--------------------------------------------------------------------------*/
46
47 #ifdef CONFIG_PM
48 static int tc6387xb_suspend(struct platform_device *dev, pm_message_t state)
49 {
50         struct tc6387xb *tc6387xb = platform_get_drvdata(dev);
51         struct tc6387xb_platform_data *pdata = dev->dev.platform_data;
52
53         if (pdata && pdata->suspend)
54                 pdata->suspend(dev);
55         clk_disable(tc6387xb->clk32k);
56
57         return 0;
58 }
59
60 static int tc6387xb_resume(struct platform_device *dev)
61 {
62         struct tc6387xb *tc6387xb = platform_get_drvdata(dev);
63         struct tc6387xb_platform_data *pdata = dev->dev.platform_data;
64
65         clk_enable(tc6387xb->clk32k);
66         if (pdata && pdata->resume)
67                 pdata->resume(dev);
68
69         tmio_core_mmc_resume(tc6387xb->scr + 0x200, 0,
70                 tc6387xb_mmc_resources[0].start & 0xfffe);
71
72         return 0;
73 }
74 #else
75 #define tc6387xb_suspend  NULL
76 #define tc6387xb_resume   NULL
77 #endif
78
79 /*--------------------------------------------------------------------------*/
80
81 static void tc6387xb_mmc_pwr(struct platform_device *mmc, int state)
82 {
83         struct platform_device *dev = to_platform_device(mmc->dev.parent);
84         struct tc6387xb *tc6387xb = platform_get_drvdata(dev);
85
86         tmio_core_mmc_pwr(tc6387xb->scr + 0x200, 0, state);
87 }
88
89 static void tc6387xb_mmc_clk_div(struct platform_device *mmc, int state)
90 {
91         struct platform_device *dev = to_platform_device(mmc->dev.parent);
92         struct tc6387xb *tc6387xb = platform_get_drvdata(dev);
93
94         tmio_core_mmc_clk_div(tc6387xb->scr + 0x200, 0, state);
95 }
96
97
98 static int tc6387xb_mmc_enable(struct platform_device *mmc)
99 {
100         struct platform_device *dev      = to_platform_device(mmc->dev.parent);
101         struct tc6387xb *tc6387xb = platform_get_drvdata(dev);
102
103         clk_enable(tc6387xb->clk32k);
104
105         tmio_core_mmc_enable(tc6387xb->scr + 0x200, 0,
106                 tc6387xb_mmc_resources[0].start & 0xfffe);
107
108         return 0;
109 }
110
111 static int tc6387xb_mmc_disable(struct platform_device *mmc)
112 {
113         struct platform_device *dev      = to_platform_device(mmc->dev.parent);
114         struct tc6387xb *tc6387xb = platform_get_drvdata(dev);
115
116         clk_disable(tc6387xb->clk32k);
117
118         return 0;
119 }
120
121 static struct tmio_mmc_data tc6387xb_mmc_data = {
122         .hclk = 24000000,
123         .set_pwr = tc6387xb_mmc_pwr,
124         .set_clk_div = tc6387xb_mmc_clk_div,
125 };
126
127 /*--------------------------------------------------------------------------*/
128
129 static struct mfd_cell tc6387xb_cells[] = {
130         [TC6387XB_CELL_MMC] = {
131                 .name = "tmio-mmc",
132                 .enable = tc6387xb_mmc_enable,
133                 .disable = tc6387xb_mmc_disable,
134                 .platform_data = &tc6387xb_mmc_data,
135                 .pdata_size    = sizeof(tc6387xb_mmc_data),
136                 .num_resources = ARRAY_SIZE(tc6387xb_mmc_resources),
137                 .resources = tc6387xb_mmc_resources,
138         },
139 };
140
141 static int __devinit tc6387xb_probe(struct platform_device *dev)
142 {
143         struct tc6387xb_platform_data *pdata = dev->dev.platform_data;
144         struct resource *iomem, *rscr;
145         struct clk *clk32k;
146         struct tc6387xb *tc6387xb;
147         int irq, ret;
148
149         iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);
150         if (!iomem) {
151                 return -EINVAL;
152         }
153
154         tc6387xb = kzalloc(sizeof *tc6387xb, GFP_KERNEL);
155         if (!tc6387xb)
156                 return -ENOMEM;
157
158         ret  = platform_get_irq(dev, 0);
159         if (ret >= 0)
160                 irq = ret;
161         else
162                 goto err_no_irq;
163
164         clk32k = clk_get(&dev->dev, "CLK_CK32K");
165         if (IS_ERR(clk32k)) {
166                 ret = PTR_ERR(clk32k);
167                 goto err_no_clk;
168         }
169
170         rscr = &tc6387xb->rscr;
171         rscr->name = "tc6387xb-core";
172         rscr->start = iomem->start;
173         rscr->end = iomem->start + 0xff;
174         rscr->flags = IORESOURCE_MEM;
175
176         ret = request_resource(iomem, rscr);
177         if (ret)
178                 goto err_resource;
179
180         tc6387xb->scr = ioremap(rscr->start, rscr->end - rscr->start + 1);
181         if (!tc6387xb->scr) {
182                 ret = -ENOMEM;
183                 goto err_ioremap;
184         }
185
186         tc6387xb->clk32k = clk32k;
187         platform_set_drvdata(dev, tc6387xb);
188
189         if (pdata && pdata->enable)
190                 pdata->enable(dev);
191
192         printk(KERN_INFO "Toshiba tc6387xb initialised\n");
193
194         ret = mfd_add_devices(&dev->dev, dev->id, tc6387xb_cells,
195                               ARRAY_SIZE(tc6387xb_cells), iomem, irq);
196
197         if (!ret)
198                 return 0;
199
200         iounmap(tc6387xb->scr);
201 err_ioremap:
202         release_resource(&tc6387xb->rscr);
203 err_resource:
204         clk_put(clk32k);
205 err_no_clk:
206 err_no_irq:
207         kfree(tc6387xb);
208         return ret;
209 }
210
211 static int __devexit tc6387xb_remove(struct platform_device *dev)
212 {
213         struct tc6387xb *tc6387xb = platform_get_drvdata(dev);
214
215         mfd_remove_devices(&dev->dev);
216         iounmap(tc6387xb->scr);
217         release_resource(&tc6387xb->rscr);
218         clk_disable(tc6387xb->clk32k);
219         clk_put(tc6387xb->clk32k);
220         platform_set_drvdata(dev, NULL);
221         kfree(tc6387xb);
222
223         return 0;
224 }
225
226
227 static struct platform_driver tc6387xb_platform_driver = {
228         .driver = {
229                 .name           = "tc6387xb",
230         },
231         .probe          = tc6387xb_probe,
232         .remove         = __devexit_p(tc6387xb_remove),
233         .suspend        = tc6387xb_suspend,
234         .resume         = tc6387xb_resume,
235 };
236
237
238 static int __init tc6387xb_init(void)
239 {
240         return platform_driver_register(&tc6387xb_platform_driver);
241 }
242
243 static void __exit tc6387xb_exit(void)
244 {
245         platform_driver_unregister(&tc6387xb_platform_driver);
246 }
247
248 module_init(tc6387xb_init);
249 module_exit(tc6387xb_exit);
250
251 MODULE_DESCRIPTION("Toshiba TC6387XB core driver");
252 MODULE_LICENSE("GPL v2");
253 MODULE_AUTHOR("Ian Molton");
254 MODULE_ALIAS("platform:tc6387xb");
255