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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 | ||
64e8867b IM |
25 | struct tc6387xb { |
26 | void __iomem *scr; | |
27 | struct clk *clk32k; | |
28 | struct resource rscr; | |
29 | }; | |
30 | ||
31 | static struct resource tc6387xb_mmc_resources[] = { | |
32 | { | |
33 | .start = 0x800, | |
34 | .end = 0x9ff, | |
35 | .flags = IORESOURCE_MEM, | |
36 | }, | |
37 | { | |
38 | .start = 0, | |
39 | .end = 0, | |
40 | .flags = IORESOURCE_IRQ, | |
41 | }, | |
42 | }; | |
43 | ||
44 | /*--------------------------------------------------------------------------*/ | |
45 | ||
cbdfb426 IM |
46 | #ifdef CONFIG_PM |
47 | static int tc6387xb_suspend(struct platform_device *dev, pm_message_t state) | |
48 | { | |
64e8867b | 49 | struct tc6387xb *tc6387xb = platform_get_drvdata(dev); |
7acb706c | 50 | struct tc6387xb_platform_data *pdata = dev->dev.platform_data; |
cbdfb426 IM |
51 | |
52 | if (pdata && pdata->suspend) | |
53 | pdata->suspend(dev); | |
64e8867b | 54 | clk_disable(tc6387xb->clk32k); |
cbdfb426 IM |
55 | |
56 | return 0; | |
57 | } | |
58 | ||
59 | static int tc6387xb_resume(struct platform_device *dev) | |
60 | { | |
64e8867b | 61 | struct tc6387xb *tc6387xb = platform_get_drvdata(dev); |
7acb706c | 62 | struct tc6387xb_platform_data *pdata = dev->dev.platform_data; |
cbdfb426 | 63 | |
64e8867b | 64 | clk_enable(tc6387xb->clk32k); |
cbdfb426 IM |
65 | if (pdata && pdata->resume) |
66 | pdata->resume(dev); | |
67 | ||
64e8867b IM |
68 | tmio_core_mmc_resume(tc6387xb->scr + 0x200, 0, |
69 | tc6387xb_mmc_resources[0].start & 0xfffe); | |
70 | ||
cbdfb426 IM |
71 | return 0; |
72 | } | |
73 | #else | |
74 | #define tc6387xb_suspend NULL | |
75 | #define tc6387xb_resume NULL | |
76 | #endif | |
77 | ||
78 | /*--------------------------------------------------------------------------*/ | |
79 | ||
64e8867b IM |
80 | static void tc6387xb_mmc_pwr(struct platform_device *mmc, int state) |
81 | { | |
82 | struct platform_device *dev = to_platform_device(mmc->dev.parent); | |
83 | struct tc6387xb *tc6387xb = platform_get_drvdata(dev); | |
84 | ||
85 | tmio_core_mmc_pwr(tc6387xb->scr + 0x200, 0, state); | |
86 | } | |
87 | ||
88 | static void tc6387xb_mmc_clk_div(struct platform_device *mmc, int state) | |
89 | { | |
90 | struct platform_device *dev = to_platform_device(mmc->dev.parent); | |
91 | struct tc6387xb *tc6387xb = platform_get_drvdata(dev); | |
92 | ||
93 | tmio_core_mmc_clk_div(tc6387xb->scr + 0x200, 0, state); | |
94 | } | |
95 | ||
96 | ||
cbdfb426 IM |
97 | static int tc6387xb_mmc_enable(struct platform_device *mmc) |
98 | { | |
99 | struct platform_device *dev = to_platform_device(mmc->dev.parent); | |
64e8867b | 100 | struct tc6387xb *tc6387xb = platform_get_drvdata(dev); |
cbdfb426 | 101 | |
64e8867b IM |
102 | clk_enable(tc6387xb->clk32k); |
103 | ||
104 | tmio_core_mmc_enable(tc6387xb->scr + 0x200, 0, | |
105 | tc6387xb_mmc_resources[0].start & 0xfffe); | |
cbdfb426 IM |
106 | |
107 | return 0; | |
108 | } | |
109 | ||
110 | static int tc6387xb_mmc_disable(struct platform_device *mmc) | |
111 | { | |
112 | struct platform_device *dev = to_platform_device(mmc->dev.parent); | |
64e8867b | 113 | struct tc6387xb *tc6387xb = platform_get_drvdata(dev); |
cbdfb426 | 114 | |
64e8867b | 115 | clk_disable(tc6387xb->clk32k); |
cbdfb426 IM |
116 | |
117 | return 0; | |
118 | } | |
119 | ||
4d3792e0 | 120 | static struct tmio_mmc_data tc6387xb_mmc_data = { |
f0e46cc4 | 121 | .hclk = 24000000, |
64e8867b IM |
122 | .set_pwr = tc6387xb_mmc_pwr, |
123 | .set_clk_div = tc6387xb_mmc_clk_div, | |
f0e46cc4 PZ |
124 | }; |
125 | ||
64e8867b | 126 | /*--------------------------------------------------------------------------*/ |
cbdfb426 IM |
127 | |
128 | static struct mfd_cell tc6387xb_cells[] = { | |
d2432a63 | 129 | [TC6387XB_CELL_MMC] = { |
cbdfb426 IM |
130 | .name = "tmio-mmc", |
131 | .enable = tc6387xb_mmc_enable, | |
132 | .disable = tc6387xb_mmc_disable, | |
f0e46cc4 | 133 | .driver_data = &tc6387xb_mmc_data, |
cbdfb426 IM |
134 | .num_resources = ARRAY_SIZE(tc6387xb_mmc_resources), |
135 | .resources = tc6387xb_mmc_resources, | |
136 | }, | |
137 | }; | |
138 | ||
139 | static int tc6387xb_probe(struct platform_device *dev) | |
140 | { | |
7acb706c | 141 | struct tc6387xb_platform_data *pdata = dev->dev.platform_data; |
64e8867b | 142 | struct resource *iomem, *rscr; |
7acb706c | 143 | struct clk *clk32k; |
64e8867b | 144 | struct tc6387xb *tc6387xb; |
cbdfb426 IM |
145 | int irq, ret; |
146 | ||
147 | iomem = platform_get_resource(dev, IORESOURCE_MEM, 0); | |
148 | if (!iomem) { | |
7acb706c | 149 | return -EINVAL; |
cbdfb426 IM |
150 | } |
151 | ||
64e8867b IM |
152 | tc6387xb = kzalloc(sizeof *tc6387xb, GFP_KERNEL); |
153 | if (!tc6387xb) | |
154 | return -ENOMEM; | |
155 | ||
cbdfb426 IM |
156 | ret = platform_get_irq(dev, 0); |
157 | if (ret >= 0) | |
158 | irq = ret; | |
159 | else | |
64e8867b | 160 | goto err_no_irq; |
cbdfb426 | 161 | |
7acb706c IM |
162 | clk32k = clk_get(&dev->dev, "CLK_CK32K"); |
163 | if (IS_ERR(clk32k)) { | |
164 | ret = PTR_ERR(clk32k); | |
64e8867b IM |
165 | goto err_no_clk; |
166 | } | |
167 | ||
168 | rscr = &tc6387xb->rscr; | |
169 | rscr->name = "tc6387xb-core"; | |
170 | rscr->start = iomem->start; | |
171 | rscr->end = iomem->start + 0xff; | |
172 | rscr->flags = IORESOURCE_MEM; | |
173 | ||
174 | ret = request_resource(iomem, rscr); | |
175 | if (ret) | |
7acb706c | 176 | goto err_resource; |
64e8867b IM |
177 | |
178 | tc6387xb->scr = ioremap(rscr->start, rscr->end - rscr->start + 1); | |
179 | if (!tc6387xb->scr) { | |
180 | ret = -ENOMEM; | |
181 | goto err_ioremap; | |
7acb706c | 182 | } |
64e8867b IM |
183 | |
184 | tc6387xb->clk32k = clk32k; | |
185 | platform_set_drvdata(dev, tc6387xb); | |
7acb706c IM |
186 | |
187 | if (pdata && pdata->enable) | |
188 | pdata->enable(dev); | |
cbdfb426 IM |
189 | |
190 | printk(KERN_INFO "Toshiba tc6387xb initialised\n"); | |
191 | ||
d2432a63 IM |
192 | tc6387xb_cells[TC6387XB_CELL_MMC].platform_data = |
193 | &tc6387xb_cells[TC6387XB_CELL_MMC]; | |
194 | tc6387xb_cells[TC6387XB_CELL_MMC].data_size = | |
195 | sizeof(tc6387xb_cells[TC6387XB_CELL_MMC]); | |
196 | ||
56bf2bda SO |
197 | ret = mfd_add_devices(&dev->dev, dev->id, tc6387xb_cells, |
198 | ARRAY_SIZE(tc6387xb_cells), iomem, irq); | |
cbdfb426 IM |
199 | |
200 | if (!ret) | |
201 | return 0; | |
202 | ||
64e8867b IM |
203 | err_ioremap: |
204 | release_resource(&tc6387xb->rscr); | |
cbdfb426 | 205 | err_resource: |
64e8867b IM |
206 | clk_put(clk32k); |
207 | err_no_clk: | |
208 | err_no_irq: | |
209 | kfree(tc6387xb); | |
cbdfb426 IM |
210 | return ret; |
211 | } | |
212 | ||
213 | static int tc6387xb_remove(struct platform_device *dev) | |
214 | { | |
7acb706c | 215 | struct clk *clk32k = platform_get_drvdata(dev); |
cbdfb426 | 216 | |
7acb706c IM |
217 | mfd_remove_devices(&dev->dev); |
218 | clk_disable(clk32k); | |
219 | clk_put(clk32k); | |
220 | platform_set_drvdata(dev, NULL); | |
cbdfb426 IM |
221 | |
222 | return 0; | |
223 | } | |
224 | ||
225 | ||
226 | static struct platform_driver tc6387xb_platform_driver = { | |
227 | .driver = { | |
228 | .name = "tc6387xb", | |
229 | }, | |
230 | .probe = tc6387xb_probe, | |
231 | .remove = tc6387xb_remove, | |
232 | .suspend = tc6387xb_suspend, | |
233 | .resume = tc6387xb_resume, | |
234 | }; | |
235 | ||
236 | ||
237 | static int __init tc6387xb_init(void) | |
238 | { | |
239 | return platform_driver_register(&tc6387xb_platform_driver); | |
240 | } | |
241 | ||
242 | static void __exit tc6387xb_exit(void) | |
243 | { | |
244 | platform_driver_unregister(&tc6387xb_platform_driver); | |
245 | } | |
246 | ||
247 | module_init(tc6387xb_init); | |
248 | module_exit(tc6387xb_exit); | |
249 | ||
250 | MODULE_DESCRIPTION("Toshiba TC6387XB core driver"); | |
251 | MODULE_LICENSE("GPL v2"); | |
252 | MODULE_AUTHOR("Ian Molton"); | |
253 | MODULE_ALIAS("platform:tc6387xb"); | |
64e8867b | 254 |