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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
cbdfb426 IM |
2 | /* |
3 | * Toshiba TC6387XB support | |
4 | * Copyright (c) 2005 Ian Molton | |
5 | * | |
cbdfb426 | 6 | * This file contains TC6387XB base support. |
cbdfb426 IM |
7 | */ |
8 | ||
9 | #include <linux/module.h> | |
10 | #include <linux/platform_device.h> | |
7acb706c | 11 | #include <linux/clk.h> |
cbdfb426 IM |
12 | #include <linux/err.h> |
13 | #include <linux/mfd/core.h> | |
14 | #include <linux/mfd/tmio.h> | |
15 | #include <linux/mfd/tc6387xb.h> | |
5a0e3ad6 | 16 | #include <linux/slab.h> |
cbdfb426 | 17 | |
d2432a63 IM |
18 | enum { |
19 | TC6387XB_CELL_MMC, | |
20 | }; | |
21 | ||
64e8867b IM |
22 | struct tc6387xb { |
23 | void __iomem *scr; | |
24 | struct clk *clk32k; | |
25 | struct resource rscr; | |
26 | }; | |
27 | ||
28 | static 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 | ||
cbdfb426 IM |
43 | #ifdef CONFIG_PM |
44 | static int tc6387xb_suspend(struct platform_device *dev, pm_message_t state) | |
45 | { | |
64e8867b | 46 | struct tc6387xb *tc6387xb = platform_get_drvdata(dev); |
334a41ce | 47 | struct tc6387xb_platform_data *pdata = dev_get_platdata(&dev->dev); |
cbdfb426 IM |
48 | |
49 | if (pdata && pdata->suspend) | |
50 | pdata->suspend(dev); | |
7263bd39 | 51 | clk_disable_unprepare(tc6387xb->clk32k); |
cbdfb426 IM |
52 | |
53 | return 0; | |
54 | } | |
55 | ||
56 | static int tc6387xb_resume(struct platform_device *dev) | |
57 | { | |
64e8867b | 58 | struct tc6387xb *tc6387xb = platform_get_drvdata(dev); |
334a41ce | 59 | struct tc6387xb_platform_data *pdata = dev_get_platdata(&dev->dev); |
cbdfb426 | 60 | |
7263bd39 | 61 | clk_prepare_enable(tc6387xb->clk32k); |
cbdfb426 IM |
62 | if (pdata && pdata->resume) |
63 | pdata->resume(dev); | |
64 | ||
64e8867b IM |
65 | tmio_core_mmc_resume(tc6387xb->scr + 0x200, 0, |
66 | tc6387xb_mmc_resources[0].start & 0xfffe); | |
67 | ||
cbdfb426 IM |
68 | return 0; |
69 | } | |
70 | #else | |
71 | #define tc6387xb_suspend NULL | |
72 | #define tc6387xb_resume NULL | |
73 | #endif | |
74 | ||
75 | /*--------------------------------------------------------------------------*/ | |
76 | ||
64e8867b IM |
77 | static void tc6387xb_mmc_pwr(struct platform_device *mmc, int state) |
78 | { | |
ed835136 | 79 | struct tc6387xb *tc6387xb = dev_get_drvdata(mmc->dev.parent); |
64e8867b IM |
80 | |
81 | tmio_core_mmc_pwr(tc6387xb->scr + 0x200, 0, state); | |
82 | } | |
83 | ||
84 | static void tc6387xb_mmc_clk_div(struct platform_device *mmc, int state) | |
85 | { | |
ed835136 | 86 | struct tc6387xb *tc6387xb = dev_get_drvdata(mmc->dev.parent); |
64e8867b IM |
87 | |
88 | tmio_core_mmc_clk_div(tc6387xb->scr + 0x200, 0, state); | |
89 | } | |
90 | ||
91 | ||
cbdfb426 IM |
92 | static int tc6387xb_mmc_enable(struct platform_device *mmc) |
93 | { | |
ed835136 | 94 | struct tc6387xb *tc6387xb = dev_get_drvdata(mmc->dev.parent); |
cbdfb426 | 95 | |
7263bd39 | 96 | clk_prepare_enable(tc6387xb->clk32k); |
64e8867b IM |
97 | |
98 | tmio_core_mmc_enable(tc6387xb->scr + 0x200, 0, | |
99 | tc6387xb_mmc_resources[0].start & 0xfffe); | |
cbdfb426 IM |
100 | |
101 | return 0; | |
102 | } | |
103 | ||
104 | static int tc6387xb_mmc_disable(struct platform_device *mmc) | |
105 | { | |
ed835136 | 106 | struct tc6387xb *tc6387xb = dev_get_drvdata(mmc->dev.parent); |
cbdfb426 | 107 | |
7263bd39 | 108 | clk_disable_unprepare(tc6387xb->clk32k); |
cbdfb426 IM |
109 | |
110 | return 0; | |
111 | } | |
112 | ||
4d3792e0 | 113 | static struct tmio_mmc_data tc6387xb_mmc_data = { |
f0e46cc4 | 114 | .hclk = 24000000, |
64e8867b IM |
115 | .set_pwr = tc6387xb_mmc_pwr, |
116 | .set_clk_div = tc6387xb_mmc_clk_div, | |
f0e46cc4 PZ |
117 | }; |
118 | ||
64e8867b | 119 | /*--------------------------------------------------------------------------*/ |
cbdfb426 | 120 | |
afb580a9 | 121 | static const struct mfd_cell tc6387xb_cells[] = { |
d2432a63 | 122 | [TC6387XB_CELL_MMC] = { |
cbdfb426 IM |
123 | .name = "tmio-mmc", |
124 | .enable = tc6387xb_mmc_enable, | |
125 | .disable = tc6387xb_mmc_disable, | |
ec71974f SO |
126 | .platform_data = &tc6387xb_mmc_data, |
127 | .pdata_size = sizeof(tc6387xb_mmc_data), | |
cbdfb426 IM |
128 | .num_resources = ARRAY_SIZE(tc6387xb_mmc_resources), |
129 | .resources = tc6387xb_mmc_resources, | |
130 | }, | |
131 | }; | |
132 | ||
f791be49 | 133 | static int tc6387xb_probe(struct platform_device *dev) |
cbdfb426 | 134 | { |
334a41ce | 135 | struct tc6387xb_platform_data *pdata = dev_get_platdata(&dev->dev); |
64e8867b | 136 | struct resource *iomem, *rscr; |
7acb706c | 137 | struct clk *clk32k; |
64e8867b | 138 | struct tc6387xb *tc6387xb; |
cbdfb426 IM |
139 | int irq, ret; |
140 | ||
141 | iomem = platform_get_resource(dev, IORESOURCE_MEM, 0); | |
d5ce79ff | 142 | if (!iomem) |
7acb706c | 143 | return -EINVAL; |
cbdfb426 | 144 | |
d5ce79ff | 145 | tc6387xb = kzalloc(sizeof(*tc6387xb), GFP_KERNEL); |
64e8867b IM |
146 | if (!tc6387xb) |
147 | return -ENOMEM; | |
148 | ||
cbdfb426 IM |
149 | ret = platform_get_irq(dev, 0); |
150 | if (ret >= 0) | |
151 | irq = ret; | |
152 | else | |
64e8867b | 153 | goto err_no_irq; |
cbdfb426 | 154 | |
7acb706c IM |
155 | clk32k = clk_get(&dev->dev, "CLK_CK32K"); |
156 | if (IS_ERR(clk32k)) { | |
157 | ret = PTR_ERR(clk32k); | |
64e8867b IM |
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) | |
7acb706c | 169 | goto err_resource; |
64e8867b | 170 | |
28f65c11 | 171 | tc6387xb->scr = ioremap(rscr->start, resource_size(rscr)); |
64e8867b IM |
172 | if (!tc6387xb->scr) { |
173 | ret = -ENOMEM; | |
174 | goto err_ioremap; | |
7acb706c | 175 | } |
64e8867b IM |
176 | |
177 | tc6387xb->clk32k = clk32k; | |
178 | platform_set_drvdata(dev, tc6387xb); | |
7acb706c IM |
179 | |
180 | if (pdata && pdata->enable) | |
181 | pdata->enable(dev); | |
cbdfb426 | 182 | |
d5ce79ff | 183 | dev_info(&dev->dev, "Toshiba tc6387xb initialised\n"); |
cbdfb426 | 184 | |
56bf2bda | 185 | ret = mfd_add_devices(&dev->dev, dev->id, tc6387xb_cells, |
0848c94f | 186 | ARRAY_SIZE(tc6387xb_cells), iomem, irq, NULL); |
cbdfb426 IM |
187 | |
188 | if (!ret) | |
189 | return 0; | |
190 | ||
08b877b8 | 191 | iounmap(tc6387xb->scr); |
64e8867b IM |
192 | err_ioremap: |
193 | release_resource(&tc6387xb->rscr); | |
cbdfb426 | 194 | err_resource: |
64e8867b IM |
195 | clk_put(clk32k); |
196 | err_no_clk: | |
197 | err_no_irq: | |
198 | kfree(tc6387xb); | |
cbdfb426 IM |
199 | return ret; |
200 | } | |
201 | ||
4740f73f | 202 | static int tc6387xb_remove(struct platform_device *dev) |
cbdfb426 | 203 | { |
08b877b8 | 204 | struct tc6387xb *tc6387xb = platform_get_drvdata(dev); |
cbdfb426 | 205 | |
7acb706c | 206 | mfd_remove_devices(&dev->dev); |
08b877b8 AL |
207 | iounmap(tc6387xb->scr); |
208 | release_resource(&tc6387xb->rscr); | |
7263bd39 | 209 | clk_disable_unprepare(tc6387xb->clk32k); |
08b877b8 | 210 | clk_put(tc6387xb->clk32k); |
08b877b8 | 211 | kfree(tc6387xb); |
cbdfb426 IM |
212 | |
213 | return 0; | |
214 | } | |
215 | ||
216 | ||
217 | static struct platform_driver tc6387xb_platform_driver = { | |
218 | .driver = { | |
219 | .name = "tc6387xb", | |
220 | }, | |
221 | .probe = tc6387xb_probe, | |
84449216 | 222 | .remove = tc6387xb_remove, |
cbdfb426 IM |
223 | .suspend = tc6387xb_suspend, |
224 | .resume = tc6387xb_resume, | |
225 | }; | |
226 | ||
65349d60 | 227 | module_platform_driver(tc6387xb_platform_driver); |
cbdfb426 IM |
228 | |
229 | MODULE_DESCRIPTION("Toshiba TC6387XB core driver"); | |
230 | MODULE_LICENSE("GPL v2"); | |
231 | MODULE_AUTHOR("Ian Molton"); | |
232 | MODULE_ALIAS("platform:tc6387xb"); | |
64e8867b | 233 |