tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
22enum {
23 TC6387XB_CELL_MMC,
24};
25
26struct tc6387xb {
27 void __iomem *scr;
28 struct clk *clk32k;
29 struct resource rscr;
30};
31
32static 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
48static 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
60static 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
81static 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
89static 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
98static 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
111static 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
121static 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
129static 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
141static 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, resource_size(rscr));
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);
201err_ioremap:
202 release_resource(&tc6387xb->rscr);
203err_resource:
204 clk_put(clk32k);
205err_no_clk:
206err_no_irq:
207 kfree(tc6387xb);
208 return ret;
209}
210
211static 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
227static 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
238static int __init tc6387xb_init(void)
239{
240 return platform_driver_register(&tc6387xb_platform_driver);
241}
242
243static void __exit tc6387xb_exit(void)
244{
245 platform_driver_unregister(&tc6387xb_platform_driver);
246}
247
248module_init(tc6387xb_init);
249module_exit(tc6387xb_exit);
250
251MODULE_DESCRIPTION("Toshiba TC6387XB core driver");
252MODULE_LICENSE("GPL v2");
253MODULE_AUTHOR("Ian Molton");
254MODULE_ALIAS("platform:tc6387xb");
255