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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 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, NULL); |
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 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 = tc6387xb_remove, |
233 | .suspend = tc6387xb_suspend, |
234 | .resume = tc6387xb_resume, |
235 | }; |
236 | |
237 | module_platform_driver(tc6387xb_platform_driver); |
238 | |
239 | MODULE_DESCRIPTION("Toshiba TC6387XB core driver"); |
240 | MODULE_LICENSE("GPL v2"); |
241 | MODULE_AUTHOR("Ian Molton"); |
242 | MODULE_ALIAS("platform:tc6387xb"); |
243 | |
244 |
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