include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit...
[linux-3.10.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                 .driver_data = &tc6387xb_mmc_data,
135                 .num_resources = ARRAY_SIZE(tc6387xb_mmc_resources),
136                 .resources = tc6387xb_mmc_resources,
137         },
138 };
139
140 static int tc6387xb_probe(struct platform_device *dev)
141 {
142         struct tc6387xb_platform_data *pdata = dev->dev.platform_data;
143         struct resource *iomem, *rscr;
144         struct clk *clk32k;
145         struct tc6387xb *tc6387xb;
146         int irq, ret;
147
148         iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);
149         if (!iomem) {
150                 return -EINVAL;
151         }
152
153         tc6387xb = kzalloc(sizeof *tc6387xb, GFP_KERNEL);
154         if (!tc6387xb)
155                 return -ENOMEM;
156
157         ret  = platform_get_irq(dev, 0);
158         if (ret >= 0)
159                 irq = ret;
160         else
161                 goto err_no_irq;
162
163         clk32k = clk_get(&dev->dev, "CLK_CK32K");
164         if (IS_ERR(clk32k)) {
165                 ret = PTR_ERR(clk32k);
166                 goto err_no_clk;
167         }
168
169         rscr = &tc6387xb->rscr;
170         rscr->name = "tc6387xb-core";
171         rscr->start = iomem->start;
172         rscr->end = iomem->start + 0xff;
173         rscr->flags = IORESOURCE_MEM;
174
175         ret = request_resource(iomem, rscr);
176         if (ret)
177                 goto err_resource;
178
179         tc6387xb->scr = ioremap(rscr->start, rscr->end - rscr->start + 1);
180         if (!tc6387xb->scr) {
181                 ret = -ENOMEM;
182                 goto err_ioremap;
183         }
184
185         tc6387xb->clk32k = clk32k;
186         platform_set_drvdata(dev, tc6387xb);
187
188         if (pdata && pdata->enable)
189                 pdata->enable(dev);
190
191         printk(KERN_INFO "Toshiba tc6387xb initialised\n");
192
193         tc6387xb_cells[TC6387XB_CELL_MMC].platform_data =
194                 &tc6387xb_cells[TC6387XB_CELL_MMC];
195         tc6387xb_cells[TC6387XB_CELL_MMC].data_size =
196                 sizeof(tc6387xb_cells[TC6387XB_CELL_MMC]);
197
198         ret = mfd_add_devices(&dev->dev, dev->id, tc6387xb_cells,
199                               ARRAY_SIZE(tc6387xb_cells), iomem, irq);
200
201         if (!ret)
202                 return 0;
203
204 err_ioremap:
205         release_resource(&tc6387xb->rscr);
206 err_resource:
207         clk_put(clk32k);
208 err_no_clk:
209 err_no_irq:
210         kfree(tc6387xb);
211         return ret;
212 }
213
214 static int tc6387xb_remove(struct platform_device *dev)
215 {
216         struct clk *clk32k = platform_get_drvdata(dev);
217
218         mfd_remove_devices(&dev->dev);
219         clk_disable(clk32k);
220         clk_put(clk32k);
221         platform_set_drvdata(dev, NULL);
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         = 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