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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * sdhci-pltfm.c Support for SDHCI platform devices
4 * Copyright (c) 2009 Intel Corporation
5 *
6 * Copyright (c) 2007, 2011 Freescale Semiconductor, Inc.
7 * Copyright (c) 2009 MontaVista Software, Inc.
8 *
9 * Authors: Xiaobo Xie <X.Xie@freescale.com>
10 * Anton Vorontsov <avorontsov@ru.mvista.com>
11 */
12
13/* Supports:
14 * SDHCI platform devices
15 *
16 * Inspired by sdhci-pci.c, by Pierre Ossman
17 */
18
19#include <linux/err.h>
20#include <linux/module.h>
21#include <linux/property.h>
22#include <linux/of.h>
23#ifdef CONFIG_PPC
24#include <asm/machdep.h>
25#endif
26#include "sdhci-pltfm.h"
27
28unsigned int sdhci_pltfm_clk_get_max_clock(struct sdhci_host *host)
29{
30 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
31
32 return clk_get_rate(pltfm_host->clk);
33}
34EXPORT_SYMBOL_GPL(sdhci_pltfm_clk_get_max_clock);
35
36static const struct sdhci_ops sdhci_pltfm_ops = {
37 .set_clock = sdhci_set_clock,
38 .set_bus_width = sdhci_set_bus_width,
39 .reset = sdhci_reset,
40 .set_uhs_signaling = sdhci_set_uhs_signaling,
41};
42
43static bool sdhci_wp_inverted(struct device *dev)
44{
45 if (device_property_present(dev, "sdhci,wp-inverted") ||
46 device_property_present(dev, "wp-inverted"))
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
57#ifdef CONFIG_OF
58static void sdhci_get_compatibility(struct platform_device *pdev)
59{
60 struct sdhci_host *host = platform_get_drvdata(pdev);
61 struct device_node *np = pdev->dev.of_node;
62
63 if (!np)
64 return;
65
66 if (of_device_is_compatible(np, "fsl,p2020-rev1-esdhc"))
67 host->quirks |= SDHCI_QUIRK_BROKEN_DMA;
68
69 if (of_device_is_compatible(np, "fsl,p2020-esdhc") ||
70 of_device_is_compatible(np, "fsl,p1010-esdhc") ||
71 of_device_is_compatible(np, "fsl,t4240-esdhc") ||
72 of_device_is_compatible(np, "fsl,mpc8536-esdhc"))
73 host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
74}
75#else
76void sdhci_get_compatibility(struct platform_device *pdev) {}
77#endif /* CONFIG_OF */
78
79void sdhci_get_property(struct platform_device *pdev)
80{
81 struct device *dev = &pdev->dev;
82 struct sdhci_host *host = platform_get_drvdata(pdev);
83 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
84 u32 bus_width;
85
86 if (device_property_present(dev, "sdhci,auto-cmd12"))
87 host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12;
88
89 if (device_property_present(dev, "sdhci,1-bit-only") ||
90 (device_property_read_u32(dev, "bus-width", &bus_width) == 0 &&
91 bus_width == 1))
92 host->quirks |= SDHCI_QUIRK_FORCE_1_BIT_DATA;
93
94 if (sdhci_wp_inverted(dev))
95 host->quirks |= SDHCI_QUIRK_INVERTED_WRITE_PROTECT;
96
97 if (device_property_present(dev, "broken-cd"))
98 host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION;
99
100 if (device_property_present(dev, "no-1-8-v"))
101 host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V;
102
103 sdhci_get_compatibility(pdev);
104
105 device_property_read_u32(dev, "clock-frequency", &pltfm_host->clock);
106
107 if (device_property_present(dev, "keep-power-in-suspend"))
108 host->mmc->pm_caps |= MMC_PM_KEEP_POWER;
109
110 if (device_property_read_bool(dev, "wakeup-source") ||
111 device_property_read_bool(dev, "enable-sdio-wakeup")) /* legacy */
112 host->mmc->pm_caps |= MMC_PM_WAKE_SDIO_IRQ;
113}
114EXPORT_SYMBOL_GPL(sdhci_get_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 void __iomem *ioaddr;
122 int irq, ret;
123
124 ioaddr = devm_platform_ioremap_resource(pdev, 0);
125 if (IS_ERR(ioaddr)) {
126 ret = PTR_ERR(ioaddr);
127 goto err;
128 }
129
130 irq = platform_get_irq(pdev, 0);
131 if (irq < 0) {
132 ret = irq;
133 goto err;
134 }
135
136 host = sdhci_alloc_host(&pdev->dev,
137 sizeof(struct sdhci_pltfm_host) + priv_size);
138
139 if (IS_ERR(host)) {
140 ret = PTR_ERR(host);
141 goto err;
142 }
143
144 host->ioaddr = ioaddr;
145 host->irq = irq;
146 host->hw_name = dev_name(&pdev->dev);
147 if (pdata && pdata->ops)
148 host->ops = pdata->ops;
149 else
150 host->ops = &sdhci_pltfm_ops;
151 if (pdata) {
152 host->quirks = pdata->quirks;
153 host->quirks2 = pdata->quirks2;
154 }
155
156 platform_set_drvdata(pdev, host);
157
158 return host;
159err:
160 dev_err(&pdev->dev, "%s failed %d\n", __func__, ret);
161 return ERR_PTR(ret);
162}
163EXPORT_SYMBOL_GPL(sdhci_pltfm_init);
164
165void sdhci_pltfm_free(struct platform_device *pdev)
166{
167 struct sdhci_host *host = platform_get_drvdata(pdev);
168
169 sdhci_free_host(host);
170}
171EXPORT_SYMBOL_GPL(sdhci_pltfm_free);
172
173int sdhci_pltfm_register(struct platform_device *pdev,
174 const struct sdhci_pltfm_data *pdata,
175 size_t priv_size)
176{
177 struct sdhci_host *host;
178 int ret = 0;
179
180 host = sdhci_pltfm_init(pdev, pdata, priv_size);
181 if (IS_ERR(host))
182 return PTR_ERR(host);
183
184 sdhci_get_property(pdev);
185
186 ret = sdhci_add_host(host);
187 if (ret)
188 sdhci_pltfm_free(pdev);
189
190 return ret;
191}
192EXPORT_SYMBOL_GPL(sdhci_pltfm_register);
193
194int sdhci_pltfm_unregister(struct platform_device *pdev)
195{
196 struct sdhci_host *host = platform_get_drvdata(pdev);
197 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
198 int dead = (readl(host->ioaddr + SDHCI_INT_STATUS) == 0xffffffff);
199
200 sdhci_remove_host(host, dead);
201 clk_disable_unprepare(pltfm_host->clk);
202 sdhci_pltfm_free(pdev);
203
204 return 0;
205}
206EXPORT_SYMBOL_GPL(sdhci_pltfm_unregister);
207
208#ifdef CONFIG_PM_SLEEP
209int sdhci_pltfm_suspend(struct device *dev)
210{
211 struct sdhci_host *host = dev_get_drvdata(dev);
212 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
213 int ret;
214
215 if (host->tuning_mode != SDHCI_TUNING_MODE_3)
216 mmc_retune_needed(host->mmc);
217
218 ret = sdhci_suspend_host(host);
219 if (ret)
220 return ret;
221
222 clk_disable_unprepare(pltfm_host->clk);
223
224 return 0;
225}
226EXPORT_SYMBOL_GPL(sdhci_pltfm_suspend);
227
228int sdhci_pltfm_resume(struct device *dev)
229{
230 struct sdhci_host *host = dev_get_drvdata(dev);
231 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
232 int ret;
233
234 ret = clk_prepare_enable(pltfm_host->clk);
235 if (ret)
236 return ret;
237
238 ret = sdhci_resume_host(host);
239 if (ret)
240 clk_disable_unprepare(pltfm_host->clk);
241
242 return ret;
243}
244EXPORT_SYMBOL_GPL(sdhci_pltfm_resume);
245#endif
246
247const struct dev_pm_ops sdhci_pltfm_pmops = {
248 SET_SYSTEM_SLEEP_PM_OPS(sdhci_pltfm_suspend, sdhci_pltfm_resume)
249};
250EXPORT_SYMBOL_GPL(sdhci_pltfm_pmops);
251
252static int __init sdhci_pltfm_drv_init(void)
253{
254 pr_info("sdhci-pltfm: SDHCI platform and OF driver helper\n");
255
256 return 0;
257}
258module_init(sdhci_pltfm_drv_init);
259
260static void __exit sdhci_pltfm_drv_exit(void)
261{
262}
263module_exit(sdhci_pltfm_drv_exit);
264
265MODULE_DESCRIPTION("SDHCI platform and OF driver helper");
266MODULE_AUTHOR("Intel Corporation");
267MODULE_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");