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31#include <linux/err.h>
32#include <linux/module.h>
33#include <linux/property.h>
34#include <linux/of.h>
35#ifdef CONFIG_PPC
36#include <asm/machdep.h>
37#endif
38#include "sdhci-pltfm.h"
39
40unsigned int sdhci_pltfm_clk_get_max_clock(struct sdhci_host *host)
41{
42 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
43
44 return clk_get_rate(pltfm_host->clk);
45}
46EXPORT_SYMBOL_GPL(sdhci_pltfm_clk_get_max_clock);
47
48static const struct sdhci_ops sdhci_pltfm_ops = {
49 .set_clock = sdhci_set_clock,
50 .set_bus_width = sdhci_set_bus_width,
51 .reset = sdhci_reset,
52 .set_uhs_signaling = sdhci_set_uhs_signaling,
53};
54
55static bool sdhci_wp_inverted(struct device *dev)
56{
57 if (device_property_present(dev, "sdhci,wp-inverted") ||
58 device_property_present(dev, "wp-inverted"))
59 return true;
60
61
62#ifdef CONFIG_PPC
63 return machine_is(mpc837x_rdb) || machine_is(mpc837x_mds);
64#else
65 return false;
66#endif
67}
68
69#ifdef CONFIG_OF
70static void sdhci_get_compatibility(struct platform_device *pdev)
71{
72 struct sdhci_host *host = platform_get_drvdata(pdev);
73 struct device_node *np = pdev->dev.of_node;
74
75 if (!np)
76 return;
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,t4240-esdhc") ||
84 of_device_is_compatible(np, "fsl,mpc8536-esdhc"))
85 host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
86}
87#else
88void sdhci_get_compatibility(struct platform_device *pdev) {}
89#endif
90
91void sdhci_get_property(struct platform_device *pdev)
92{
93 struct device *dev = &pdev->dev;
94 struct sdhci_host *host = platform_get_drvdata(pdev);
95 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
96 u32 bus_width;
97
98 if (device_property_present(dev, "sdhci,auto-cmd12"))
99 host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12;
100
101 if (device_property_present(dev, "sdhci,1-bit-only") ||
102 (device_property_read_u32(dev, "bus-width", &bus_width) == 0 &&
103 bus_width == 1))
104 host->quirks |= SDHCI_QUIRK_FORCE_1_BIT_DATA;
105
106 if (sdhci_wp_inverted(dev))
107 host->quirks |= SDHCI_QUIRK_INVERTED_WRITE_PROTECT;
108
109 if (device_property_present(dev, "broken-cd"))
110 host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION;
111
112 if (device_property_present(dev, "no-1-8-v"))
113 host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V;
114
115 sdhci_get_compatibility(pdev);
116
117 device_property_read_u32(dev, "clock-frequency", &pltfm_host->clock);
118
119 if (device_property_present(dev, "keep-power-in-suspend"))
120 host->mmc->pm_caps |= MMC_PM_KEEP_POWER;
121
122 if (device_property_read_bool(dev, "wakeup-source") ||
123 device_property_read_bool(dev, "enable-sdio-wakeup"))
124 host->mmc->pm_caps |= MMC_PM_WAKE_SDIO_IRQ;
125}
126EXPORT_SYMBOL_GPL(sdhci_get_property);
127
128struct sdhci_host *sdhci_pltfm_init(struct platform_device *pdev,
129 const struct sdhci_pltfm_data *pdata,
130 size_t priv_size)
131{
132 struct sdhci_host *host;
133 struct resource *iomem;
134 void __iomem *ioaddr;
135 int irq, ret;
136
137 iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
138 ioaddr = devm_ioremap_resource(&pdev->dev, iomem);
139 if (IS_ERR(ioaddr)) {
140 ret = PTR_ERR(ioaddr);
141 goto err;
142 }
143
144 irq = platform_get_irq(pdev, 0);
145 if (irq < 0) {
146 dev_err(&pdev->dev, "failed to get IRQ number\n");
147 ret = irq;
148 goto err;
149 }
150
151 host = sdhci_alloc_host(&pdev->dev,
152 sizeof(struct sdhci_pltfm_host) + priv_size);
153
154 if (IS_ERR(host)) {
155 ret = PTR_ERR(host);
156 goto err;
157 }
158
159 host->ioaddr = ioaddr;
160 host->irq = irq;
161 host->hw_name = dev_name(&pdev->dev);
162 if (pdata && pdata->ops)
163 host->ops = pdata->ops;
164 else
165 host->ops = &sdhci_pltfm_ops;
166 if (pdata) {
167 host->quirks = pdata->quirks;
168 host->quirks2 = pdata->quirks2;
169 }
170
171 platform_set_drvdata(pdev, host);
172
173 return host;
174err:
175 dev_err(&pdev->dev, "%s failed %d\n", __func__, ret);
176 return ERR_PTR(ret);
177}
178EXPORT_SYMBOL_GPL(sdhci_pltfm_init);
179
180void sdhci_pltfm_free(struct platform_device *pdev)
181{
182 struct sdhci_host *host = platform_get_drvdata(pdev);
183
184 sdhci_free_host(host);
185}
186EXPORT_SYMBOL_GPL(sdhci_pltfm_free);
187
188int sdhci_pltfm_register(struct platform_device *pdev,
189 const struct sdhci_pltfm_data *pdata,
190 size_t priv_size)
191{
192 struct sdhci_host *host;
193 int ret = 0;
194
195 host = sdhci_pltfm_init(pdev, pdata, priv_size);
196 if (IS_ERR(host))
197 return PTR_ERR(host);
198
199 sdhci_get_property(pdev);
200
201 ret = sdhci_add_host(host);
202 if (ret)
203 sdhci_pltfm_free(pdev);
204
205 return ret;
206}
207EXPORT_SYMBOL_GPL(sdhci_pltfm_register);
208
209int sdhci_pltfm_unregister(struct platform_device *pdev)
210{
211 struct sdhci_host *host = platform_get_drvdata(pdev);
212 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
213 int dead = (readl(host->ioaddr + SDHCI_INT_STATUS) == 0xffffffff);
214
215 sdhci_remove_host(host, dead);
216 clk_disable_unprepare(pltfm_host->clk);
217 sdhci_pltfm_free(pdev);
218
219 return 0;
220}
221EXPORT_SYMBOL_GPL(sdhci_pltfm_unregister);
222
223#ifdef CONFIG_PM_SLEEP
224int sdhci_pltfm_suspend(struct device *dev)
225{
226 struct sdhci_host *host = dev_get_drvdata(dev);
227 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
228 int ret;
229
230 if (host->tuning_mode != SDHCI_TUNING_MODE_3)
231 mmc_retune_needed(host->mmc);
232
233 ret = sdhci_suspend_host(host);
234 if (ret)
235 return ret;
236
237 clk_disable_unprepare(pltfm_host->clk);
238
239 return 0;
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 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
247 int ret;
248
249 ret = clk_prepare_enable(pltfm_host->clk);
250 if (ret)
251 return ret;
252
253 ret = sdhci_resume_host(host);
254 if (ret)
255 clk_disable_unprepare(pltfm_host->clk);
256
257 return ret;
258}
259EXPORT_SYMBOL_GPL(sdhci_pltfm_resume);
260#endif
261
262const struct dev_pm_ops sdhci_pltfm_pmops = {
263 SET_SYSTEM_SLEEP_PM_OPS(sdhci_pltfm_suspend, sdhci_pltfm_resume)
264};
265EXPORT_SYMBOL_GPL(sdhci_pltfm_pmops);
266
267static int __init sdhci_pltfm_drv_init(void)
268{
269 pr_info("sdhci-pltfm: SDHCI platform and OF driver helper\n");
270
271 return 0;
272}
273module_init(sdhci_pltfm_drv_init);
274
275static void __exit sdhci_pltfm_drv_exit(void)
276{
277}
278module_exit(sdhci_pltfm_drv_exit);
279
280MODULE_DESCRIPTION("SDHCI platform and OF driver helper");
281MODULE_AUTHOR("Intel Corporation");
282MODULE_LICENSE("GPL v2");
283
