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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// 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#ifdef CONFIG_PPC
23#include <asm/machdep.h>
24#endif
25#include "sdhci-pltfm.h"
26
27unsigned int sdhci_pltfm_clk_get_max_clock(struct sdhci_host *host)
28{
29 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
30
31 return clk_get_rate(pltfm_host->clk);
32}
33EXPORT_SYMBOL_GPL(sdhci_pltfm_clk_get_max_clock);
34
35static const struct sdhci_ops sdhci_pltfm_ops = {
36 .set_clock = sdhci_set_clock,
37 .set_bus_width = sdhci_set_bus_width,
38 .reset = sdhci_reset,
39 .set_uhs_signaling = sdhci_set_uhs_signaling,
40};
41
42static bool sdhci_wp_inverted(struct device *dev)
43{
44 if (device_property_present(dev, "sdhci,wp-inverted") ||
45 device_property_present(dev, "wp-inverted"))
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
56static void sdhci_get_compatibility(struct platform_device *pdev)
57{
58 struct device *dev = &pdev->dev;
59 struct sdhci_host *host = platform_get_drvdata(pdev);
60
61 if (device_is_compatible(dev, "fsl,p2020-rev1-esdhc"))
62 host->quirks |= SDHCI_QUIRK_BROKEN_DMA;
63
64 if (device_is_compatible(dev, "fsl,p2020-esdhc") ||
65 device_is_compatible(dev, "fsl,p1010-esdhc") ||
66 device_is_compatible(dev, "fsl,t4240-esdhc") ||
67 device_is_compatible(dev, "fsl,mpc8536-esdhc"))
68 host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
69}
70
71void sdhci_get_property(struct platform_device *pdev)
72{
73 struct device *dev = &pdev->dev;
74 struct sdhci_host *host = platform_get_drvdata(pdev);
75 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
76 u32 bus_width;
77
78 if (device_property_present(dev, "sdhci,auto-cmd12"))
79 host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12;
80
81 if (device_property_present(dev, "sdhci,1-bit-only") ||
82 (device_property_read_u32(dev, "bus-width", &bus_width) == 0 &&
83 bus_width == 1))
84 host->quirks |= SDHCI_QUIRK_FORCE_1_BIT_DATA;
85
86 if (sdhci_wp_inverted(dev))
87 host->quirks |= SDHCI_QUIRK_INVERTED_WRITE_PROTECT;
88
89 if (device_property_present(dev, "broken-cd"))
90 host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION;
91
92 if (device_property_present(dev, "no-1-8-v"))
93 host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V;
94
95 sdhci_get_compatibility(pdev);
96
97 device_property_read_u32(dev, "clock-frequency", &pltfm_host->clock);
98
99 if (device_property_present(dev, "keep-power-in-suspend"))
100 host->mmc->pm_caps |= MMC_PM_KEEP_POWER;
101
102 if (device_property_read_bool(dev, "wakeup-source") ||
103 device_property_read_bool(dev, "enable-sdio-wakeup")) /* legacy */
104 host->mmc->pm_caps |= MMC_PM_WAKE_SDIO_IRQ;
105}
106EXPORT_SYMBOL_GPL(sdhci_get_property);
107
108struct sdhci_host *sdhci_pltfm_init(struct platform_device *pdev,
109 const struct sdhci_pltfm_data *pdata,
110 size_t priv_size)
111{
112 struct sdhci_host *host;
113 void __iomem *ioaddr;
114 int irq;
115
116 ioaddr = devm_platform_ioremap_resource(pdev, 0);
117 if (IS_ERR(ioaddr))
118 return ERR_CAST(ioaddr);
119
120 irq = platform_get_irq(pdev, 0);
121 if (irq < 0)
122 return ERR_PTR(irq);
123
124 host = sdhci_alloc_host(&pdev->dev,
125 sizeof(struct sdhci_pltfm_host) + priv_size);
126 if (IS_ERR(host)) {
127 dev_err(&pdev->dev, "%s failed %pe\n", __func__, host);
128 return ERR_CAST(host);
129 }
130
131 host->ioaddr = ioaddr;
132 host->irq = irq;
133 host->hw_name = dev_name(&pdev->dev);
134 if (pdata && pdata->ops)
135 host->ops = pdata->ops;
136 else
137 host->ops = &sdhci_pltfm_ops;
138 if (pdata) {
139 host->quirks = pdata->quirks;
140 host->quirks2 = pdata->quirks2;
141 }
142
143 platform_set_drvdata(pdev, host);
144
145 return host;
146}
147EXPORT_SYMBOL_GPL(sdhci_pltfm_init);
148
149void sdhci_pltfm_free(struct platform_device *pdev)
150{
151 struct sdhci_host *host = platform_get_drvdata(pdev);
152
153 sdhci_free_host(host);
154}
155EXPORT_SYMBOL_GPL(sdhci_pltfm_free);
156
157int sdhci_pltfm_init_and_add_host(struct platform_device *pdev,
158 const struct sdhci_pltfm_data *pdata,
159 size_t priv_size)
160{
161 struct sdhci_host *host;
162 int ret = 0;
163
164 host = sdhci_pltfm_init(pdev, pdata, priv_size);
165 if (IS_ERR(host))
166 return PTR_ERR(host);
167
168 sdhci_get_property(pdev);
169
170 ret = sdhci_add_host(host);
171 if (ret)
172 sdhci_pltfm_free(pdev);
173
174 return ret;
175}
176EXPORT_SYMBOL_GPL(sdhci_pltfm_init_and_add_host);
177
178void sdhci_pltfm_remove(struct platform_device *pdev)
179{
180 struct sdhci_host *host = platform_get_drvdata(pdev);
181 int dead = (readl(host->ioaddr + SDHCI_INT_STATUS) == 0xffffffff);
182
183 sdhci_remove_host(host, dead);
184 sdhci_pltfm_free(pdev);
185}
186EXPORT_SYMBOL_GPL(sdhci_pltfm_remove);
187
188#ifdef CONFIG_PM_SLEEP
189int sdhci_pltfm_suspend(struct device *dev)
190{
191 struct sdhci_host *host = dev_get_drvdata(dev);
192 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
193 int ret;
194
195 if (host->tuning_mode != SDHCI_TUNING_MODE_3)
196 mmc_retune_needed(host->mmc);
197
198 ret = sdhci_suspend_host(host);
199 if (ret)
200 return ret;
201
202 clk_disable_unprepare(pltfm_host->clk);
203
204 return 0;
205}
206EXPORT_SYMBOL_GPL(sdhci_pltfm_suspend);
207
208int sdhci_pltfm_resume(struct device *dev)
209{
210 struct sdhci_host *host = dev_get_drvdata(dev);
211 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
212 int ret;
213
214 ret = clk_prepare_enable(pltfm_host->clk);
215 if (ret)
216 return ret;
217
218 ret = sdhci_resume_host(host);
219 if (ret)
220 clk_disable_unprepare(pltfm_host->clk);
221
222 return ret;
223}
224EXPORT_SYMBOL_GPL(sdhci_pltfm_resume);
225#endif
226
227const struct dev_pm_ops sdhci_pltfm_pmops = {
228 SET_SYSTEM_SLEEP_PM_OPS(sdhci_pltfm_suspend, sdhci_pltfm_resume)
229};
230EXPORT_SYMBOL_GPL(sdhci_pltfm_pmops);
231
232static int __init sdhci_pltfm_drv_init(void)
233{
234 pr_info("sdhci-pltfm: SDHCI platform and OF driver helper\n");
235
236 return 0;
237}
238module_init(sdhci_pltfm_drv_init);
239
240static void __exit sdhci_pltfm_drv_exit(void)
241{
242}
243module_exit(sdhci_pltfm_drv_exit);
244
245MODULE_DESCRIPTION("SDHCI platform and OF driver helper");
246MODULE_AUTHOR("Intel Corporation");
247MODULE_LICENSE("GPL v2");