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a3456a2d RR |
1 | /* |
2 | * sdhci-pltfm.c Support for SDHCI platform devices | |
3 | * Copyright (c) 2009 Intel Corporation | |
4 | * | |
38576af1 SG |
5 | * Copyright (c) 2007 Freescale Semiconductor, Inc. |
6 | * Copyright (c) 2009 MontaVista Software, Inc. | |
7 | * | |
8 | * Authors: Xiaobo Xie <X.Xie@freescale.com> | |
9 | * Anton Vorontsov <avorontsov@ru.mvista.com> | |
10 | * | |
a3456a2d RR |
11 | * This program is free software; you can redistribute it and/or modify |
12 | * it under the terms of the GNU General Public License version 2 as | |
13 | * published by the Free Software Foundation. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | */ | |
24 | ||
25 | /* Supports: | |
26 | * SDHCI platform devices | |
27 | * | |
28 | * Inspired by sdhci-pci.c, by Pierre Ossman | |
29 | */ | |
30 | ||
85d6509d | 31 | #include <linux/err.h> |
88b47679 | 32 | #include <linux/module.h> |
38576af1 SG |
33 | #include <linux/of.h> |
34 | #ifdef CONFIG_PPC | |
35 | #include <asm/machdep.h> | |
36 | #endif | |
515033f9 | 37 | #include "sdhci-pltfm.h" |
a3456a2d | 38 | |
a3456a2d RR |
39 | static struct sdhci_ops sdhci_pltfm_ops = { |
40 | }; | |
41 | ||
38576af1 SG |
42 | #ifdef CONFIG_OF |
43 | static bool sdhci_of_wp_inverted(struct device_node *np) | |
44 | { | |
45 | if (of_get_property(np, "sdhci,wp-inverted", NULL)) | |
46 | return true; | |
47 | ||
48 | /* Old device trees don't have the wp-inverted property. */ | |
49 | #ifdef CONFIG_PPC | |
50 | return machine_is(mpc837x_rdb) || machine_is(mpc837x_mds); | |
51 | #else | |
52 | return false; | |
53 | #endif /* CONFIG_PPC */ | |
54 | } | |
55 | ||
56 | void sdhci_get_of_property(struct platform_device *pdev) | |
57 | { | |
58 | struct device_node *np = pdev->dev.of_node; | |
59 | struct sdhci_host *host = platform_get_drvdata(pdev); | |
60 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); | |
61 | const __be32 *clk; | |
62 | int size; | |
63 | ||
64 | if (of_device_is_available(np)) { | |
65 | if (of_get_property(np, "sdhci,auto-cmd12", NULL)) | |
66 | host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12; | |
67 | ||
68 | if (of_get_property(np, "sdhci,1-bit-only", NULL)) | |
69 | host->quirks |= SDHCI_QUIRK_FORCE_1_BIT_DATA; | |
70 | ||
71 | if (sdhci_of_wp_inverted(np)) | |
72 | host->quirks |= SDHCI_QUIRK_INVERTED_WRITE_PROTECT; | |
73 | ||
74 | clk = of_get_property(np, "clock-frequency", &size); | |
75 | if (clk && size == sizeof(*clk) && *clk) | |
76 | pltfm_host->clock = be32_to_cpup(clk); | |
77 | } | |
78 | } | |
79 | #else | |
80 | void sdhci_get_of_property(struct platform_device *pdev) {} | |
81 | #endif /* CONFIG_OF */ | |
f0de8369 | 82 | EXPORT_SYMBOL_GPL(sdhci_get_of_property); |
38576af1 | 83 | |
85d6509d SG |
84 | struct sdhci_host *sdhci_pltfm_init(struct platform_device *pdev, |
85 | struct sdhci_pltfm_data *pdata) | |
a3456a2d RR |
86 | { |
87 | struct sdhci_host *host; | |
4b711cb1 | 88 | struct sdhci_pltfm_host *pltfm_host; |
a4d2177f | 89 | struct device_node *np = pdev->dev.of_node; |
a3456a2d RR |
90 | struct resource *iomem; |
91 | int ret; | |
92 | ||
a3456a2d RR |
93 | iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
94 | if (!iomem) { | |
95 | ret = -ENOMEM; | |
96 | goto err; | |
97 | } | |
98 | ||
e632c45a | 99 | if (resource_size(iomem) < 0x100) |
85d6509d | 100 | dev_err(&pdev->dev, "Invalid iomem size!\n"); |
a3456a2d | 101 | |
4b711cb1 | 102 | /* Some PCI-based MFD need the parent here */ |
a4d2177f | 103 | if (pdev->dev.parent != &platform_bus && !np) |
4b711cb1 | 104 | host = sdhci_alloc_host(pdev->dev.parent, sizeof(*pltfm_host)); |
a3456a2d | 105 | else |
4b711cb1 | 106 | host = sdhci_alloc_host(&pdev->dev, sizeof(*pltfm_host)); |
a3456a2d RR |
107 | |
108 | if (IS_ERR(host)) { | |
109 | ret = PTR_ERR(host); | |
110 | goto err; | |
111 | } | |
112 | ||
4b711cb1 WS |
113 | pltfm_host = sdhci_priv(host); |
114 | ||
85d6509d | 115 | host->hw_name = dev_name(&pdev->dev); |
a7626b7a AV |
116 | if (pdata && pdata->ops) |
117 | host->ops = pdata->ops; | |
118 | else | |
119 | host->ops = &sdhci_pltfm_ops; | |
120 | if (pdata) | |
121 | host->quirks = pdata->quirks; | |
a3456a2d RR |
122 | host->irq = platform_get_irq(pdev, 0); |
123 | ||
124 | if (!request_mem_region(iomem->start, resource_size(iomem), | |
125 | mmc_hostname(host->mmc))) { | |
126 | dev_err(&pdev->dev, "cannot request region\n"); | |
127 | ret = -EBUSY; | |
128 | goto err_request; | |
129 | } | |
130 | ||
131 | host->ioaddr = ioremap(iomem->start, resource_size(iomem)); | |
132 | if (!host->ioaddr) { | |
133 | dev_err(&pdev->dev, "failed to remap registers\n"); | |
134 | ret = -ENOMEM; | |
135 | goto err_remap; | |
136 | } | |
137 | ||
a3456a2d RR |
138 | platform_set_drvdata(pdev, host); |
139 | ||
85d6509d | 140 | return host; |
a3456a2d | 141 | |
a3456a2d RR |
142 | err_remap: |
143 | release_mem_region(iomem->start, resource_size(iomem)); | |
144 | err_request: | |
145 | sdhci_free_host(host); | |
146 | err: | |
85d6509d SG |
147 | dev_err(&pdev->dev, "%s failed %d\n", __func__, ret); |
148 | return ERR_PTR(ret); | |
a3456a2d | 149 | } |
f0de8369 | 150 | EXPORT_SYMBOL_GPL(sdhci_pltfm_init); |
a3456a2d | 151 | |
85d6509d | 152 | void sdhci_pltfm_free(struct platform_device *pdev) |
a3456a2d RR |
153 | { |
154 | struct sdhci_host *host = platform_get_drvdata(pdev); | |
155 | struct resource *iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
a3456a2d | 156 | |
a3456a2d RR |
157 | iounmap(host->ioaddr); |
158 | release_mem_region(iomem->start, resource_size(iomem)); | |
159 | sdhci_free_host(host); | |
160 | platform_set_drvdata(pdev, NULL); | |
85d6509d | 161 | } |
f0de8369 | 162 | EXPORT_SYMBOL_GPL(sdhci_pltfm_free); |
a3456a2d | 163 | |
85d6509d SG |
164 | int sdhci_pltfm_register(struct platform_device *pdev, |
165 | struct sdhci_pltfm_data *pdata) | |
166 | { | |
167 | struct sdhci_host *host; | |
168 | int ret = 0; | |
169 | ||
170 | host = sdhci_pltfm_init(pdev, pdata); | |
171 | if (IS_ERR(host)) | |
172 | return PTR_ERR(host); | |
173 | ||
38576af1 SG |
174 | sdhci_get_of_property(pdev); |
175 | ||
85d6509d SG |
176 | ret = sdhci_add_host(host); |
177 | if (ret) | |
178 | sdhci_pltfm_free(pdev); | |
179 | ||
180 | return ret; | |
a3456a2d | 181 | } |
f0de8369 | 182 | EXPORT_SYMBOL_GPL(sdhci_pltfm_register); |
a3456a2d | 183 | |
85d6509d SG |
184 | int sdhci_pltfm_unregister(struct platform_device *pdev) |
185 | { | |
186 | struct sdhci_host *host = platform_get_drvdata(pdev); | |
187 | int dead = (readl(host->ioaddr + SDHCI_INT_STATUS) == 0xffffffff); | |
188 | ||
189 | sdhci_remove_host(host, dead); | |
190 | sdhci_pltfm_free(pdev); | |
191 | ||
192 | return 0; | |
193 | } | |
f0de8369 | 194 | EXPORT_SYMBOL_GPL(sdhci_pltfm_unregister); |
515033f9 | 195 | |
be8ae09d | 196 | #ifdef CONFIG_PM |
29495aa0 | 197 | static int sdhci_pltfm_suspend(struct device *dev) |
be8ae09d | 198 | { |
29495aa0 | 199 | struct sdhci_host *host = dev_get_drvdata(dev); |
be8ae09d | 200 | |
29495aa0 | 201 | return sdhci_suspend_host(host); |
be8ae09d GC |
202 | } |
203 | ||
29495aa0 | 204 | static int sdhci_pltfm_resume(struct device *dev) |
be8ae09d | 205 | { |
29495aa0 | 206 | struct sdhci_host *host = dev_get_drvdata(dev); |
be8ae09d GC |
207 | |
208 | return sdhci_resume_host(host); | |
209 | } | |
29495aa0 ML |
210 | |
211 | const struct dev_pm_ops sdhci_pltfm_pmops = { | |
212 | .suspend = sdhci_pltfm_suspend, | |
213 | .resume = sdhci_pltfm_resume, | |
214 | }; | |
215 | EXPORT_SYMBOL_GPL(sdhci_pltfm_pmops); | |
be8ae09d | 216 | #endif /* CONFIG_PM */ |
f0de8369 SG |
217 | |
218 | static int __init sdhci_pltfm_drv_init(void) | |
219 | { | |
220 | pr_info("sdhci-pltfm: SDHCI platform and OF driver helper\n"); | |
221 | ||
222 | return 0; | |
223 | } | |
224 | module_init(sdhci_pltfm_drv_init); | |
225 | ||
226 | static void __exit sdhci_pltfm_drv_exit(void) | |
227 | { | |
228 | } | |
229 | module_exit(sdhci_pltfm_drv_exit); | |
230 | ||
231 | MODULE_DESCRIPTION("SDHCI platform and OF driver helper"); | |
232 | MODULE_AUTHOR("Intel Corporation"); | |
233 | MODULE_LICENSE("GPL v2"); |