2 * Copyright 2012 Freescale Semiconductor, Inc.
4 * The code contained herein is licensed under the GNU General Public
5 * License. You may obtain a copy of the GNU General Public License
6 * Version 2 or later at the following locations:
8 * http://www.opensource.org/licenses/gpl-license.html
9 * http://www.gnu.org/copyleft/gpl.html
12 #include <linux/module.h>
13 #include <linux/of_platform.h>
14 #include <linux/err.h>
16 #include <linux/delay.h>
18 #include "ci_hdrc_imx.h"
20 #define MX25_USB_PHY_CTRL_OFFSET 0x08
21 #define MX25_BM_EXTERNAL_VBUS_DIVIDER BIT(23)
23 #define MX25_EHCI_INTERFACE_SINGLE_UNI (2 << 0)
24 #define MX25_EHCI_INTERFACE_DIFF_UNI (0 << 0)
25 #define MX25_EHCI_INTERFACE_MASK (0xf)
27 #define MX25_OTG_SIC_SHIFT 29
28 #define MX25_OTG_SIC_MASK (0x3 << MX25_OTG_SIC_SHIFT)
29 #define MX25_OTG_PM_BIT BIT(24)
30 #define MX25_OTG_PP_BIT BIT(11)
31 #define MX25_OTG_OCPOL_BIT BIT(3)
33 #define MX25_H1_SIC_SHIFT 21
34 #define MX25_H1_SIC_MASK (0x3 << MX25_H1_SIC_SHIFT)
35 #define MX25_H1_PP_BIT BIT(18)
36 #define MX25_H1_PM_BIT BIT(16)
37 #define MX25_H1_IPPUE_UP_BIT BIT(7)
38 #define MX25_H1_IPPUE_DOWN_BIT BIT(6)
39 #define MX25_H1_TLL_BIT BIT(5)
40 #define MX25_H1_USBTE_BIT BIT(4)
41 #define MX25_H1_OCPOL_BIT BIT(2)
43 #define MX27_H1_PM_BIT BIT(8)
44 #define MX27_H2_PM_BIT BIT(16)
45 #define MX27_OTG_PM_BIT BIT(24)
47 #define MX53_USB_OTG_PHY_CTRL_0_OFFSET 0x08
48 #define MX53_USB_OTG_PHY_CTRL_1_OFFSET 0x0c
49 #define MX53_USB_UH2_CTRL_OFFSET 0x14
50 #define MX53_USB_UH3_CTRL_OFFSET 0x18
51 #define MX53_BM_OVER_CUR_DIS_H1 BIT(5)
52 #define MX53_BM_OVER_CUR_DIS_OTG BIT(8)
53 #define MX53_BM_OVER_CUR_DIS_UHx BIT(30)
54 #define MX53_USB_PHYCTRL1_PLLDIV_MASK 0x3
55 #define MX53_USB_PLL_DIV_24_MHZ 0x01
57 #define MX6_BM_OVER_CUR_DIS BIT(7)
59 #define VF610_OVER_CUR_DIS BIT(7)
62 /* It's called once when probe a usb device */
63 int (*init)(struct imx_usbmisc_data *data);
64 /* It's called once after adding a usb device */
65 int (*post)(struct imx_usbmisc_data *data);
71 const struct usbmisc_ops *ops;
74 static int usbmisc_imx25_init(struct imx_usbmisc_data *data)
76 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
83 spin_lock_irqsave(&usbmisc->lock, flags);
84 switch (data->index) {
86 val = readl(usbmisc->base);
87 val &= ~(MX25_OTG_SIC_MASK | MX25_OTG_PP_BIT);
88 val |= (MX25_EHCI_INTERFACE_DIFF_UNI & MX25_EHCI_INTERFACE_MASK) << MX25_OTG_SIC_SHIFT;
89 val |= (MX25_OTG_PM_BIT | MX25_OTG_OCPOL_BIT);
90 writel(val, usbmisc->base);
93 val = readl(usbmisc->base);
94 val &= ~(MX25_H1_SIC_MASK | MX25_H1_PP_BIT | MX25_H1_IPPUE_UP_BIT);
95 val |= (MX25_EHCI_INTERFACE_SINGLE_UNI & MX25_EHCI_INTERFACE_MASK) << MX25_H1_SIC_SHIFT;
96 val |= (MX25_H1_PM_BIT | MX25_H1_OCPOL_BIT | MX25_H1_TLL_BIT |
97 MX25_H1_USBTE_BIT | MX25_H1_IPPUE_DOWN_BIT);
99 writel(val, usbmisc->base);
103 spin_unlock_irqrestore(&usbmisc->lock, flags);
108 static int usbmisc_imx25_post(struct imx_usbmisc_data *data)
110 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
119 spin_lock_irqsave(&usbmisc->lock, flags);
120 reg = usbmisc->base + MX25_USB_PHY_CTRL_OFFSET;
122 writel(val | MX25_BM_EXTERNAL_VBUS_DIVIDER, reg);
123 spin_unlock_irqrestore(&usbmisc->lock, flags);
124 usleep_range(5000, 10000); /* needed to stabilize voltage */
130 static int usbmisc_imx27_init(struct imx_usbmisc_data *data)
132 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
136 switch (data->index) {
138 val = MX27_OTG_PM_BIT;
141 val = MX27_H1_PM_BIT;
144 val = MX27_H2_PM_BIT;
150 spin_lock_irqsave(&usbmisc->lock, flags);
151 if (data->disable_oc)
152 val = readl(usbmisc->base) | val;
154 val = readl(usbmisc->base) & ~val;
155 writel(val, usbmisc->base);
156 spin_unlock_irqrestore(&usbmisc->lock, flags);
161 static int usbmisc_imx53_init(struct imx_usbmisc_data *data)
163 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
164 void __iomem *reg = NULL;
171 /* Select a 24 MHz reference clock for the PHY */
172 val = readl(usbmisc->base + MX53_USB_OTG_PHY_CTRL_1_OFFSET);
173 val &= ~MX53_USB_PHYCTRL1_PLLDIV_MASK;
174 val |= MX53_USB_PLL_DIV_24_MHZ;
175 writel(val, usbmisc->base + MX53_USB_OTG_PHY_CTRL_1_OFFSET);
177 if (data->disable_oc) {
178 spin_lock_irqsave(&usbmisc->lock, flags);
179 switch (data->index) {
181 reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_0_OFFSET;
182 val = readl(reg) | MX53_BM_OVER_CUR_DIS_OTG;
185 reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_0_OFFSET;
186 val = readl(reg) | MX53_BM_OVER_CUR_DIS_H1;
189 reg = usbmisc->base + MX53_USB_UH2_CTRL_OFFSET;
190 val = readl(reg) | MX53_BM_OVER_CUR_DIS_UHx;
193 reg = usbmisc->base + MX53_USB_UH3_CTRL_OFFSET;
194 val = readl(reg) | MX53_BM_OVER_CUR_DIS_UHx;
199 spin_unlock_irqrestore(&usbmisc->lock, flags);
205 static int usbmisc_imx6q_init(struct imx_usbmisc_data *data)
207 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
214 if (data->disable_oc) {
215 spin_lock_irqsave(&usbmisc->lock, flags);
216 reg = readl(usbmisc->base + data->index * 4);
217 writel(reg | MX6_BM_OVER_CUR_DIS,
218 usbmisc->base + data->index * 4);
219 spin_unlock_irqrestore(&usbmisc->lock, flags);
225 static int usbmisc_vf610_init(struct imx_usbmisc_data *data)
227 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
231 * Vybrid only has one misc register set, but in two different
232 * areas. These is reflected in two instances of this driver.
234 if (data->index >= 1)
237 if (data->disable_oc) {
238 reg = readl(usbmisc->base);
239 writel(reg | VF610_OVER_CUR_DIS, usbmisc->base);
245 static const struct usbmisc_ops imx25_usbmisc_ops = {
246 .init = usbmisc_imx25_init,
247 .post = usbmisc_imx25_post,
250 static const struct usbmisc_ops imx27_usbmisc_ops = {
251 .init = usbmisc_imx27_init,
254 static const struct usbmisc_ops imx53_usbmisc_ops = {
255 .init = usbmisc_imx53_init,
258 static const struct usbmisc_ops imx6q_usbmisc_ops = {
259 .init = usbmisc_imx6q_init,
262 static const struct usbmisc_ops vf610_usbmisc_ops = {
263 .init = usbmisc_vf610_init,
266 int imx_usbmisc_init(struct imx_usbmisc_data *data)
268 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
270 if (!usbmisc->ops->init)
272 return usbmisc->ops->init(data);
274 EXPORT_SYMBOL_GPL(imx_usbmisc_init);
276 int imx_usbmisc_init_post(struct imx_usbmisc_data *data)
278 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
280 if (!usbmisc->ops->post)
282 return usbmisc->ops->post(data);
284 EXPORT_SYMBOL_GPL(imx_usbmisc_init_post);
286 static const struct of_device_id usbmisc_imx_dt_ids[] = {
288 .compatible = "fsl,imx25-usbmisc",
289 .data = &imx25_usbmisc_ops,
292 .compatible = "fsl,imx35-usbmisc",
293 .data = &imx25_usbmisc_ops,
296 .compatible = "fsl,imx27-usbmisc",
297 .data = &imx27_usbmisc_ops,
300 .compatible = "fsl,imx51-usbmisc",
301 .data = &imx53_usbmisc_ops,
304 .compatible = "fsl,imx53-usbmisc",
305 .data = &imx53_usbmisc_ops,
308 .compatible = "fsl,imx6q-usbmisc",
309 .data = &imx6q_usbmisc_ops,
312 .compatible = "fsl,vf610-usbmisc",
313 .data = &vf610_usbmisc_ops,
317 MODULE_DEVICE_TABLE(of, usbmisc_imx_dt_ids);
319 static int usbmisc_imx_probe(struct platform_device *pdev)
321 struct resource *res;
322 struct imx_usbmisc *data;
323 struct of_device_id *tmp_dev;
325 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
329 spin_lock_init(&data->lock);
331 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
332 data->base = devm_ioremap_resource(&pdev->dev, res);
333 if (IS_ERR(data->base))
334 return PTR_ERR(data->base);
336 tmp_dev = (struct of_device_id *)
337 of_match_device(usbmisc_imx_dt_ids, &pdev->dev);
338 data->ops = (const struct usbmisc_ops *)tmp_dev->data;
339 platform_set_drvdata(pdev, data);
344 static int usbmisc_imx_remove(struct platform_device *pdev)
349 static struct platform_driver usbmisc_imx_driver = {
350 .probe = usbmisc_imx_probe,
351 .remove = usbmisc_imx_remove,
353 .name = "usbmisc_imx",
354 .of_match_table = usbmisc_imx_dt_ids,
358 module_platform_driver(usbmisc_imx_driver);
360 MODULE_ALIAS("platform:usbmisc-imx");
361 MODULE_LICENSE("GPL v2");
362 MODULE_DESCRIPTION("driver for imx usb non-core registers");
363 MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");