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9#include <linux/module.h>
10#include <linux/platform_device.h>
11#include <linux/clk.h>
12#include <linux/err.h>
13#include <linux/mfd/core.h>
14#include <linux/mfd/tmio.h>
15#include <linux/mfd/tc6387xb.h>
16#include <linux/slab.h>
17
18enum {
19 TC6387XB_CELL_MMC,
20};
21
22struct tc6387xb {
23 void __iomem *scr;
24 struct clk *clk32k;
25 struct resource rscr;
26};
27
28static const struct resource tc6387xb_mmc_resources[] = {
29 {
30 .start = 0x800,
31 .end = 0x9ff,
32 .flags = IORESOURCE_MEM,
33 },
34 {
35 .start = 0,
36 .end = 0,
37 .flags = IORESOURCE_IRQ,
38 },
39};
40
41
42
43#ifdef CONFIG_PM
44static int tc6387xb_suspend(struct platform_device *dev, pm_message_t state)
45{
46 struct tc6387xb *tc6387xb = platform_get_drvdata(dev);
47 struct tc6387xb_platform_data *pdata = dev_get_platdata(&dev->dev);
48
49 if (pdata && pdata->suspend)
50 pdata->suspend(dev);
51 clk_disable_unprepare(tc6387xb->clk32k);
52
53 return 0;
54}
55
56static int tc6387xb_resume(struct platform_device *dev)
57{
58 struct tc6387xb *tc6387xb = platform_get_drvdata(dev);
59 struct tc6387xb_platform_data *pdata = dev_get_platdata(&dev->dev);
60
61 clk_prepare_enable(tc6387xb->clk32k);
62 if (pdata && pdata->resume)
63 pdata->resume(dev);
64
65 tmio_core_mmc_resume(tc6387xb->scr + 0x200, 0,
66 tc6387xb_mmc_resources[0].start & 0xfffe);
67
68 return 0;
69}
70#else
71#define tc6387xb_suspend NULL
72#define tc6387xb_resume NULL
73#endif
74
75
76
77static void tc6387xb_mmc_pwr(struct platform_device *mmc, int state)
78{
79 struct tc6387xb *tc6387xb = dev_get_drvdata(mmc->dev.parent);
80
81 tmio_core_mmc_pwr(tc6387xb->scr + 0x200, 0, state);
82}
83
84static void tc6387xb_mmc_clk_div(struct platform_device *mmc, int state)
85{
86 struct tc6387xb *tc6387xb = dev_get_drvdata(mmc->dev.parent);
87
88 tmio_core_mmc_clk_div(tc6387xb->scr + 0x200, 0, state);
89}
90
91
92static int tc6387xb_mmc_enable(struct platform_device *mmc)
93{
94 struct tc6387xb *tc6387xb = dev_get_drvdata(mmc->dev.parent);
95
96 clk_prepare_enable(tc6387xb->clk32k);
97
98 tmio_core_mmc_enable(tc6387xb->scr + 0x200, 0,
99 tc6387xb_mmc_resources[0].start & 0xfffe);
100
101 return 0;
102}
103
104static int tc6387xb_mmc_disable(struct platform_device *mmc)
105{
106 struct tc6387xb *tc6387xb = dev_get_drvdata(mmc->dev.parent);
107
108 clk_disable_unprepare(tc6387xb->clk32k);
109
110 return 0;
111}
112
113static struct tmio_mmc_data tc6387xb_mmc_data = {
114 .hclk = 24000000,
115 .set_pwr = tc6387xb_mmc_pwr,
116 .set_clk_div = tc6387xb_mmc_clk_div,
117};
118
119
120
121static const struct mfd_cell tc6387xb_cells[] = {
122 [TC6387XB_CELL_MMC] = {
123 .name = "tmio-mmc",
124 .enable = tc6387xb_mmc_enable,
125 .disable = tc6387xb_mmc_disable,
126 .platform_data = &tc6387xb_mmc_data,
127 .pdata_size = sizeof(tc6387xb_mmc_data),
128 .num_resources = ARRAY_SIZE(tc6387xb_mmc_resources),
129 .resources = tc6387xb_mmc_resources,
130 },
131};
132
133static int tc6387xb_probe(struct platform_device *dev)
134{
135 struct tc6387xb_platform_data *pdata = dev_get_platdata(&dev->dev);
136 struct resource *iomem, *rscr;
137 struct clk *clk32k;
138 struct tc6387xb *tc6387xb;
139 int irq, ret;
140
141 iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);
142 if (!iomem)
143 return -EINVAL;
144
145 tc6387xb = kzalloc(sizeof(*tc6387xb), GFP_KERNEL);
146 if (!tc6387xb)
147 return -ENOMEM;
148
149 ret = platform_get_irq(dev, 0);
150 if (ret >= 0)
151 irq = ret;
152 else
153 goto err_no_irq;
154
155 clk32k = clk_get(&dev->dev, "CLK_CK32K");
156 if (IS_ERR(clk32k)) {
157 ret = PTR_ERR(clk32k);
158 goto err_no_clk;
159 }
160
161 rscr = &tc6387xb->rscr;
162 rscr->name = "tc6387xb-core";
163 rscr->start = iomem->start;
164 rscr->end = iomem->start + 0xff;
165 rscr->flags = IORESOURCE_MEM;
166
167 ret = request_resource(iomem, rscr);
168 if (ret)
169 goto err_resource;
170
171 tc6387xb->scr = ioremap(rscr->start, resource_size(rscr));
172 if (!tc6387xb->scr) {
173 ret = -ENOMEM;
174 goto err_ioremap;
175 }
176
177 tc6387xb->clk32k = clk32k;
178 platform_set_drvdata(dev, tc6387xb);
179
180 if (pdata && pdata->enable)
181 pdata->enable(dev);
182
183 dev_info(&dev->dev, "Toshiba tc6387xb initialised\n");
184
185 ret = mfd_add_devices(&dev->dev, dev->id, tc6387xb_cells,
186 ARRAY_SIZE(tc6387xb_cells), iomem, irq, NULL);
187
188 if (!ret)
189 return 0;
190
191 iounmap(tc6387xb->scr);
192err_ioremap:
193 release_resource(&tc6387xb->rscr);
194err_resource:
195 clk_put(clk32k);
196err_no_clk:
197err_no_irq:
198 kfree(tc6387xb);
199 return ret;
200}
201
202static int tc6387xb_remove(struct platform_device *dev)
203{
204 struct tc6387xb *tc6387xb = platform_get_drvdata(dev);
205
206 mfd_remove_devices(&dev->dev);
207 iounmap(tc6387xb->scr);
208 release_resource(&tc6387xb->rscr);
209 clk_disable_unprepare(tc6387xb->clk32k);
210 clk_put(tc6387xb->clk32k);
211 kfree(tc6387xb);
212
213 return 0;
214}
215
216
217static struct platform_driver tc6387xb_platform_driver = {
218 .driver = {
219 .name = "tc6387xb",
220 },
221 .probe = tc6387xb_probe,
222 .remove = tc6387xb_remove,
223 .suspend = tc6387xb_suspend,
224 .resume = tc6387xb_resume,
225};
226
227module_platform_driver(tc6387xb_platform_driver);
228
229MODULE_DESCRIPTION("Toshiba TC6387XB core driver");
230MODULE_LICENSE("GPL v2");
231MODULE_AUTHOR("Ian Molton");
232MODULE_ALIAS("platform:tc6387xb");
233
234
