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1/*
2 * sdhci-pltfm.c Support for SDHCI platform devices
3 * Copyright (c) 2009 Intel Corporation
4 *
5 * Copyright (c) 2007, 2011 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 *
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
31#include <linux/err.h>
32#include <linux/module.h>
33#include <linux/of.h>
34#ifdef CONFIG_PPC
35#include <asm/machdep.h>
36#endif
37#include "sdhci-pltfm.h"
38
39static struct sdhci_ops sdhci_pltfm_ops = {
40};
41
42#ifdef CONFIG_OF
43static bool sdhci_of_wp_inverted(struct device_node *np)
44{
45 if (of_get_property(np, "sdhci,wp-inverted", NULL) ||
46 of_get_property(np, "wp-inverted", NULL))
47 return true;
48
49 /* Old device trees don't have the wp-inverted property. */
50#ifdef CONFIG_PPC
51 return machine_is(mpc837x_rdb) || machine_is(mpc837x_mds);
52#else
53 return false;
54#endif /* CONFIG_PPC */
55}
56
57void sdhci_get_of_property(struct platform_device *pdev)
58{
59 struct device_node *np = pdev->dev.of_node;
60 struct sdhci_host *host = platform_get_drvdata(pdev);
61 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
62 const __be32 *clk;
63 u32 bus_width;
64 int size;
65
66 if (of_device_is_available(np)) {
67 if (of_get_property(np, "sdhci,auto-cmd12", NULL))
68 host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12;
69
70 if (of_get_property(np, "sdhci,1-bit-only", NULL) ||
71 (of_property_read_u32(np, "bus-width", &bus_width) == 0 &&
72 bus_width == 1))
73 host->quirks |= SDHCI_QUIRK_FORCE_1_BIT_DATA;
74
75 if (sdhci_of_wp_inverted(np))
76 host->quirks |= SDHCI_QUIRK_INVERTED_WRITE_PROTECT;
77
78 if (of_device_is_compatible(np, "fsl,p2020-rev1-esdhc"))
79 host->quirks |= SDHCI_QUIRK_BROKEN_DMA;
80
81 if (of_device_is_compatible(np, "fsl,p2020-esdhc") ||
82 of_device_is_compatible(np, "fsl,p1010-esdhc") ||
83 of_device_is_compatible(np, "fsl,mpc8536-esdhc"))
84 host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
85
86 clk = of_get_property(np, "clock-frequency", &size);
87 if (clk && size == sizeof(*clk) && *clk)
88 pltfm_host->clock = be32_to_cpup(clk);
89 }
90}
91#else
92void sdhci_get_of_property(struct platform_device *pdev) {}
93#endif /* CONFIG_OF */
94EXPORT_SYMBOL_GPL(sdhci_get_of_property);
95
96struct sdhci_host *sdhci_pltfm_init(struct platform_device *pdev,
97 struct sdhci_pltfm_data *pdata)
98{
99 struct sdhci_host *host;
100 struct sdhci_pltfm_host *pltfm_host;
101 struct device_node *np = pdev->dev.of_node;
102 struct resource *iomem;
103 int ret;
104
105 iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
106 if (!iomem) {
107 ret = -ENOMEM;
108 goto err;
109 }
110
111 if (resource_size(iomem) < 0x100)
112 dev_err(&pdev->dev, "Invalid iomem size!\n");
113
114 /* Some PCI-based MFD need the parent here */
115 if (pdev->dev.parent != &platform_bus && !np)
116 host = sdhci_alloc_host(pdev->dev.parent, sizeof(*pltfm_host));
117 else
118 host = sdhci_alloc_host(&pdev->dev, sizeof(*pltfm_host));
119
120 if (IS_ERR(host)) {
121 ret = PTR_ERR(host);
122 goto err;
123 }
124
125 pltfm_host = sdhci_priv(host);
126
127 host->hw_name = dev_name(&pdev->dev);
128 if (pdata && pdata->ops)
129 host->ops = pdata->ops;
130 else
131 host->ops = &sdhci_pltfm_ops;
132 if (pdata)
133 host->quirks = pdata->quirks;
134 host->irq = platform_get_irq(pdev, 0);
135
136 if (!request_mem_region(iomem->start, resource_size(iomem),
137 mmc_hostname(host->mmc))) {
138 dev_err(&pdev->dev, "cannot request region\n");
139 ret = -EBUSY;
140 goto err_request;
141 }
142
143 host->ioaddr = ioremap(iomem->start, resource_size(iomem));
144 if (!host->ioaddr) {
145 dev_err(&pdev->dev, "failed to remap registers\n");
146 ret = -ENOMEM;
147 goto err_remap;
148 }
149
150 platform_set_drvdata(pdev, host);
151
152 return host;
153
154err_remap:
155 release_mem_region(iomem->start, resource_size(iomem));
156err_request:
157 sdhci_free_host(host);
158err:
159 dev_err(&pdev->dev, "%s failed %d\n", __func__, ret);
160 return ERR_PTR(ret);
161}
162EXPORT_SYMBOL_GPL(sdhci_pltfm_init);
163
164void sdhci_pltfm_free(struct platform_device *pdev)
165{
166 struct sdhci_host *host = platform_get_drvdata(pdev);
167 struct resource *iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
168
169 iounmap(host->ioaddr);
170 release_mem_region(iomem->start, resource_size(iomem));
171 sdhci_free_host(host);
172 platform_set_drvdata(pdev, NULL);
173}
174EXPORT_SYMBOL_GPL(sdhci_pltfm_free);
175
176int sdhci_pltfm_register(struct platform_device *pdev,
177 struct sdhci_pltfm_data *pdata)
178{
179 struct sdhci_host *host;
180 int ret = 0;
181
182 host = sdhci_pltfm_init(pdev, pdata);
183 if (IS_ERR(host))
184 return PTR_ERR(host);
185
186 sdhci_get_of_property(pdev);
187
188 ret = sdhci_add_host(host);
189 if (ret)
190 sdhci_pltfm_free(pdev);
191
192 return ret;
193}
194EXPORT_SYMBOL_GPL(sdhci_pltfm_register);
195
196int sdhci_pltfm_unregister(struct platform_device *pdev)
197{
198 struct sdhci_host *host = platform_get_drvdata(pdev);
199 int dead = (readl(host->ioaddr + SDHCI_INT_STATUS) == 0xffffffff);
200
201 sdhci_remove_host(host, dead);
202 sdhci_pltfm_free(pdev);
203
204 return 0;
205}
206EXPORT_SYMBOL_GPL(sdhci_pltfm_unregister);
207
208#ifdef CONFIG_PM
209static int sdhci_pltfm_suspend(struct device *dev)
210{
211 struct sdhci_host *host = dev_get_drvdata(dev);
212
213 return sdhci_suspend_host(host);
214}
215
216static int sdhci_pltfm_resume(struct device *dev)
217{
218 struct sdhci_host *host = dev_get_drvdata(dev);
219
220 return sdhci_resume_host(host);
221}
222
223const struct dev_pm_ops sdhci_pltfm_pmops = {
224 .suspend = sdhci_pltfm_suspend,
225 .resume = sdhci_pltfm_resume,
226};
227EXPORT_SYMBOL_GPL(sdhci_pltfm_pmops);
228#endif /* CONFIG_PM */
229
230static int __init sdhci_pltfm_drv_init(void)
231{
232 pr_info("sdhci-pltfm: SDHCI platform and OF driver helper\n");
233
234 return 0;
235}
236module_init(sdhci_pltfm_drv_init);
237
238static void __exit sdhci_pltfm_drv_exit(void)
239{
240}
241module_exit(sdhci_pltfm_drv_exit);
242
243MODULE_DESCRIPTION("SDHCI platform and OF driver helper");
244MODULE_AUTHOR("Intel Corporation");
245MODULE_LICENSE("GPL v2");
1/*
2 * sdhci-pltfm.c Support for SDHCI platform devices
3 * Copyright (c) 2009 Intel Corporation
4 *
5 * Copyright (c) 2007, 2011 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 *
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
31#include <linux/err.h>
32#include <linux/module.h>
33#include <linux/of.h>
34#ifdef CONFIG_PPC
35#include <asm/machdep.h>
36#endif
37#include "sdhci-pltfm.h"
38
39unsigned int sdhci_pltfm_clk_get_max_clock(struct sdhci_host *host)
40{
41 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
42
43 return clk_get_rate(pltfm_host->clk);
44}
45EXPORT_SYMBOL_GPL(sdhci_pltfm_clk_get_max_clock);
46
47static const struct sdhci_ops sdhci_pltfm_ops = {
48 .set_clock = sdhci_set_clock,
49 .set_bus_width = sdhci_set_bus_width,
50 .reset = sdhci_reset,
51 .set_uhs_signaling = sdhci_set_uhs_signaling,
52};
53
54#ifdef CONFIG_OF
55static bool sdhci_of_wp_inverted(struct device_node *np)
56{
57 if (of_get_property(np, "sdhci,wp-inverted", NULL) ||
58 of_get_property(np, "wp-inverted", NULL))
59 return true;
60
61 /* Old device trees don't have the wp-inverted property. */
62#ifdef CONFIG_PPC
63 return machine_is(mpc837x_rdb) || machine_is(mpc837x_mds);
64#else
65 return false;
66#endif /* CONFIG_PPC */
67}
68
69void sdhci_get_of_property(struct platform_device *pdev)
70{
71 struct device_node *np = pdev->dev.of_node;
72 struct sdhci_host *host = platform_get_drvdata(pdev);
73 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
74 u32 bus_width;
75
76 if (of_get_property(np, "sdhci,auto-cmd12", NULL))
77 host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12;
78
79 if (of_get_property(np, "sdhci,1-bit-only", NULL) ||
80 (of_property_read_u32(np, "bus-width", &bus_width) == 0 &&
81 bus_width == 1))
82 host->quirks |= SDHCI_QUIRK_FORCE_1_BIT_DATA;
83
84 if (sdhci_of_wp_inverted(np))
85 host->quirks |= SDHCI_QUIRK_INVERTED_WRITE_PROTECT;
86
87 if (of_get_property(np, "broken-cd", NULL))
88 host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION;
89
90 if (of_get_property(np, "no-1-8-v", NULL))
91 host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V;
92
93 if (of_device_is_compatible(np, "fsl,p2020-rev1-esdhc"))
94 host->quirks |= SDHCI_QUIRK_BROKEN_DMA;
95
96 if (of_device_is_compatible(np, "fsl,p2020-esdhc") ||
97 of_device_is_compatible(np, "fsl,p1010-esdhc") ||
98 of_device_is_compatible(np, "fsl,t4240-esdhc") ||
99 of_device_is_compatible(np, "fsl,mpc8536-esdhc"))
100 host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
101
102 of_property_read_u32(np, "clock-frequency", &pltfm_host->clock);
103
104 if (of_find_property(np, "keep-power-in-suspend", NULL))
105 host->mmc->pm_caps |= MMC_PM_KEEP_POWER;
106
107 if (of_property_read_bool(np, "wakeup-source") ||
108 of_property_read_bool(np, "enable-sdio-wakeup")) /* legacy */
109 host->mmc->pm_caps |= MMC_PM_WAKE_SDIO_IRQ;
110}
111#else
112void sdhci_get_of_property(struct platform_device *pdev) {}
113#endif /* CONFIG_OF */
114EXPORT_SYMBOL_GPL(sdhci_get_of_property);
115
116struct sdhci_host *sdhci_pltfm_init(struct platform_device *pdev,
117 const struct sdhci_pltfm_data *pdata,
118 size_t priv_size)
119{
120 struct sdhci_host *host;
121 struct resource *iomem;
122 int ret;
123
124 iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
125 if (!iomem) {
126 ret = -ENOMEM;
127 goto err;
128 }
129
130 if (resource_size(iomem) < 0x100)
131 dev_err(&pdev->dev, "Invalid iomem size!\n");
132
133 host = sdhci_alloc_host(&pdev->dev,
134 sizeof(struct sdhci_pltfm_host) + priv_size);
135
136 if (IS_ERR(host)) {
137 ret = PTR_ERR(host);
138 goto err;
139 }
140
141 host->hw_name = dev_name(&pdev->dev);
142 if (pdata && pdata->ops)
143 host->ops = pdata->ops;
144 else
145 host->ops = &sdhci_pltfm_ops;
146 if (pdata) {
147 host->quirks = pdata->quirks;
148 host->quirks2 = pdata->quirks2;
149 }
150
151 host->irq = platform_get_irq(pdev, 0);
152
153 if (!request_mem_region(iomem->start, resource_size(iomem),
154 mmc_hostname(host->mmc))) {
155 dev_err(&pdev->dev, "cannot request region\n");
156 ret = -EBUSY;
157 goto err_request;
158 }
159
160 host->ioaddr = ioremap(iomem->start, resource_size(iomem));
161 if (!host->ioaddr) {
162 dev_err(&pdev->dev, "failed to remap registers\n");
163 ret = -ENOMEM;
164 goto err_remap;
165 }
166
167 /*
168 * Some platforms need to probe the controller to be able to
169 * determine which caps should be used.
170 */
171 if (host->ops && host->ops->platform_init)
172 host->ops->platform_init(host);
173
174 platform_set_drvdata(pdev, host);
175
176 return host;
177
178err_remap:
179 release_mem_region(iomem->start, resource_size(iomem));
180err_request:
181 sdhci_free_host(host);
182err:
183 dev_err(&pdev->dev, "%s failed %d\n", __func__, ret);
184 return ERR_PTR(ret);
185}
186EXPORT_SYMBOL_GPL(sdhci_pltfm_init);
187
188void sdhci_pltfm_free(struct platform_device *pdev)
189{
190 struct sdhci_host *host = platform_get_drvdata(pdev);
191 struct resource *iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
192
193 iounmap(host->ioaddr);
194 release_mem_region(iomem->start, resource_size(iomem));
195 sdhci_free_host(host);
196}
197EXPORT_SYMBOL_GPL(sdhci_pltfm_free);
198
199int sdhci_pltfm_register(struct platform_device *pdev,
200 const struct sdhci_pltfm_data *pdata,
201 size_t priv_size)
202{
203 struct sdhci_host *host;
204 int ret = 0;
205
206 host = sdhci_pltfm_init(pdev, pdata, priv_size);
207 if (IS_ERR(host))
208 return PTR_ERR(host);
209
210 sdhci_get_of_property(pdev);
211
212 ret = sdhci_add_host(host);
213 if (ret)
214 sdhci_pltfm_free(pdev);
215
216 return ret;
217}
218EXPORT_SYMBOL_GPL(sdhci_pltfm_register);
219
220int sdhci_pltfm_unregister(struct platform_device *pdev)
221{
222 struct sdhci_host *host = platform_get_drvdata(pdev);
223 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
224 int dead = (readl(host->ioaddr + SDHCI_INT_STATUS) == 0xffffffff);
225
226 sdhci_remove_host(host, dead);
227 clk_disable_unprepare(pltfm_host->clk);
228 sdhci_pltfm_free(pdev);
229
230 return 0;
231}
232EXPORT_SYMBOL_GPL(sdhci_pltfm_unregister);
233
234#ifdef CONFIG_PM
235int sdhci_pltfm_suspend(struct device *dev)
236{
237 struct sdhci_host *host = dev_get_drvdata(dev);
238
239 return sdhci_suspend_host(host);
240}
241EXPORT_SYMBOL_GPL(sdhci_pltfm_suspend);
242
243int sdhci_pltfm_resume(struct device *dev)
244{
245 struct sdhci_host *host = dev_get_drvdata(dev);
246
247 return sdhci_resume_host(host);
248}
249EXPORT_SYMBOL_GPL(sdhci_pltfm_resume);
250
251const struct dev_pm_ops sdhci_pltfm_pmops = {
252 .suspend = sdhci_pltfm_suspend,
253 .resume = sdhci_pltfm_resume,
254};
255EXPORT_SYMBOL_GPL(sdhci_pltfm_pmops);
256#endif /* CONFIG_PM */
257
258static int __init sdhci_pltfm_drv_init(void)
259{
260 pr_info("sdhci-pltfm: SDHCI platform and OF driver helper\n");
261
262 return 0;
263}
264module_init(sdhci_pltfm_drv_init);
265
266static void __exit sdhci_pltfm_drv_exit(void)
267{
268}
269module_exit(sdhci_pltfm_drv_exit);
270
271MODULE_DESCRIPTION("SDHCI platform and OF driver helper");
272MODULE_AUTHOR("Intel Corporation");
273MODULE_LICENSE("GPL v2");