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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
50#ifdef CONFIG_PPC
51 return machine_is(mpc837x_rdb) || machine_is(mpc837x_mds);
52#else
53 return false;
54#endif
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
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"))
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 struct resource *iomem;
122 void __iomem *ioaddr;
123 int irq, ret;
124
125 iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
126 ioaddr = devm_ioremap_resource(&pdev->dev, iomem);
127 if (IS_ERR(ioaddr)) {
128 ret = PTR_ERR(ioaddr);
129 goto err;
130 }
131
132 irq = platform_get_irq(pdev, 0);
133 if (irq < 0) {
134 dev_err(&pdev->dev, "failed to get IRQ number\n");
135 ret = irq;
136 goto err;
137 }
138
139 host = sdhci_alloc_host(&pdev->dev,
140 sizeof(struct sdhci_pltfm_host) + priv_size);
141
142 if (IS_ERR(host)) {
143 ret = PTR_ERR(host);
144 goto err;
145 }
146
147 host->ioaddr = ioaddr;
148 host->irq = irq;
149 host->hw_name = dev_name(&pdev->dev);
150 if (pdata && pdata->ops)
151 host->ops = pdata->ops;
152 else
153 host->ops = &sdhci_pltfm_ops;
154 if (pdata) {
155 host->quirks = pdata->quirks;
156 host->quirks2 = pdata->quirks2;
157 }
158
159 platform_set_drvdata(pdev, host);
160
161 return host;
162err:
163 dev_err(&pdev->dev, "%s failed %d\n", __func__, ret);
164 return ERR_PTR(ret);
165}
166EXPORT_SYMBOL_GPL(sdhci_pltfm_init);
167
168void sdhci_pltfm_free(struct platform_device *pdev)
169{
170 struct sdhci_host *host = platform_get_drvdata(pdev);
171
172 sdhci_free_host(host);
173}
174EXPORT_SYMBOL_GPL(sdhci_pltfm_free);
175
176int sdhci_pltfm_register(struct platform_device *pdev,
177 const struct sdhci_pltfm_data *pdata,
178 size_t priv_size)
179{
180 struct sdhci_host *host;
181 int ret = 0;
182
183 host = sdhci_pltfm_init(pdev, pdata, priv_size);
184 if (IS_ERR(host))
185 return PTR_ERR(host);
186
187 sdhci_get_property(pdev);
188
189 ret = sdhci_add_host(host);
190 if (ret)
191 sdhci_pltfm_free(pdev);
192
193 return ret;
194}
195EXPORT_SYMBOL_GPL(sdhci_pltfm_register);
196
197int sdhci_pltfm_unregister(struct platform_device *pdev)
198{
199 struct sdhci_host *host = platform_get_drvdata(pdev);
200 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
201 int dead = (readl(host->ioaddr + SDHCI_INT_STATUS) == 0xffffffff);
202
203 sdhci_remove_host(host, dead);
204 clk_disable_unprepare(pltfm_host->clk);
205 sdhci_pltfm_free(pdev);
206
207 return 0;
208}
209EXPORT_SYMBOL_GPL(sdhci_pltfm_unregister);
210
211#ifdef CONFIG_PM_SLEEP
212int sdhci_pltfm_suspend(struct device *dev)
213{
214 struct sdhci_host *host = dev_get_drvdata(dev);
215 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
216 int ret;
217
218 if (host->tuning_mode != SDHCI_TUNING_MODE_3)
219 mmc_retune_needed(host->mmc);
220
221 ret = sdhci_suspend_host(host);
222 if (ret)
223 return ret;
224
225 clk_disable_unprepare(pltfm_host->clk);
226
227 return 0;
228}
229EXPORT_SYMBOL_GPL(sdhci_pltfm_suspend);
230
231int sdhci_pltfm_resume(struct device *dev)
232{
233 struct sdhci_host *host = dev_get_drvdata(dev);
234 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
235 int ret;
236
237 ret = clk_prepare_enable(pltfm_host->clk);
238 if (ret)
239 return ret;
240
241 ret = sdhci_resume_host(host);
242 if (ret)
243 clk_disable_unprepare(pltfm_host->clk);
244
245 return ret;
246}
247EXPORT_SYMBOL_GPL(sdhci_pltfm_resume);
248#endif
249
250const struct dev_pm_ops sdhci_pltfm_pmops = {
251 SET_SYSTEM_SLEEP_PM_OPS(sdhci_pltfm_suspend, sdhci_pltfm_resume)
252};
253EXPORT_SYMBOL_GPL(sdhci_pltfm_pmops);
254
255static int __init sdhci_pltfm_drv_init(void)
256{
257 pr_info("sdhci-pltfm: SDHCI platform and OF driver helper\n");
258
259 return 0;
260}
261module_init(sdhci_pltfm_drv_init);
262
263static void __exit sdhci_pltfm_drv_exit(void)
264{
265}
266module_exit(sdhci_pltfm_drv_exit);
267
268MODULE_DESCRIPTION("SDHCI platform and OF driver helper");
269MODULE_AUTHOR("Intel Corporation");
270MODULE_LICENSE("GPL v2");
271
