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/clk.h>
15 #include <linux/err.h>
17 #include <linux/delay.h>
19 #include "ci_hdrc_imx.h"
21 #define MX25_USB_PHY_CTRL_OFFSET 0x08
22 #define MX25_BM_EXTERNAL_VBUS_DIVIDER BIT(23)
24 #define MX25_EHCI_INTERFACE_SINGLE_UNI (2 << 0)
25 #define MX25_EHCI_INTERFACE_DIFF_UNI (0 << 0)
26 #define MX25_EHCI_INTERFACE_MASK (0xf)
28 #define MX25_OTG_SIC_SHIFT 29
29 #define MX25_OTG_SIC_MASK (0x3 << MX25_OTG_SIC_SHIFT)
30 #define MX25_OTG_PM_BIT BIT(24)
31 #define MX25_OTG_PP_BIT BIT(11)
32 #define MX25_OTG_OCPOL_BIT BIT(3)
34 #define MX25_H1_SIC_SHIFT 21
35 #define MX25_H1_SIC_MASK (0x3 << MX25_H1_SIC_SHIFT)
36 #define MX25_H1_PP_BIT BIT(18)
37 #define MX25_H1_PM_BIT BIT(16)
38 #define MX25_H1_IPPUE_UP_BIT BIT(7)
39 #define MX25_H1_IPPUE_DOWN_BIT BIT(6)
40 #define MX25_H1_TLL_BIT BIT(5)
41 #define MX25_H1_USBTE_BIT BIT(4)
42 #define MX25_H1_OCPOL_BIT BIT(2)
44 #define MX27_H1_PM_BIT BIT(8)
45 #define MX27_H2_PM_BIT BIT(16)
46 #define MX27_OTG_PM_BIT BIT(24)
48 #define MX53_USB_OTG_PHY_CTRL_0_OFFSET 0x08
49 #define MX53_USB_OTG_PHY_CTRL_1_OFFSET 0x0c
50 #define MX53_USB_UH2_CTRL_OFFSET 0x14
51 #define MX53_USB_UH3_CTRL_OFFSET 0x18
52 #define MX53_BM_OVER_CUR_DIS_H1 BIT(5)
53 #define MX53_BM_OVER_CUR_DIS_OTG BIT(8)
54 #define MX53_BM_OVER_CUR_DIS_UHx BIT(30)
55 #define MX53_USB_PHYCTRL1_PLLDIV_MASK 0x3
56 #define MX53_USB_PLL_DIV_24_MHZ 0x01
58 #define MX6_BM_OVER_CUR_DIS BIT(7)
60 #define VF610_OVER_CUR_DIS BIT(7)
63 /* It's called once when probe a usb device */
64 int (*init)(struct imx_usbmisc_data *data);
65 /* It's called once after adding a usb device */
66 int (*post)(struct imx_usbmisc_data *data);
73 const struct usbmisc_ops *ops;
76 static int usbmisc_imx25_init(struct imx_usbmisc_data *data)
78 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
85 spin_lock_irqsave(&usbmisc->lock, flags);
86 switch (data->index) {
88 val = readl(usbmisc->base);
89 val &= ~(MX25_OTG_SIC_MASK | MX25_OTG_PP_BIT);
90 val |= (MX25_EHCI_INTERFACE_DIFF_UNI & MX25_EHCI_INTERFACE_MASK) << MX25_OTG_SIC_SHIFT;
91 val |= (MX25_OTG_PM_BIT | MX25_OTG_OCPOL_BIT);
92 writel(val, usbmisc->base);
95 val = readl(usbmisc->base);
96 val &= ~(MX25_H1_SIC_MASK | MX25_H1_PP_BIT | MX25_H1_IPPUE_UP_BIT);
97 val |= (MX25_EHCI_INTERFACE_SINGLE_UNI & MX25_EHCI_INTERFACE_MASK) << MX25_H1_SIC_SHIFT;
98 val |= (MX25_H1_PM_BIT | MX25_H1_OCPOL_BIT | MX25_H1_TLL_BIT |
99 MX25_H1_USBTE_BIT | MX25_H1_IPPUE_DOWN_BIT);
101 writel(val, usbmisc->base);
105 spin_unlock_irqrestore(&usbmisc->lock, flags);
110 static int usbmisc_imx25_post(struct imx_usbmisc_data *data)
112 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
121 spin_lock_irqsave(&usbmisc->lock, flags);
122 reg = usbmisc->base + MX25_USB_PHY_CTRL_OFFSET;
124 writel(val | MX25_BM_EXTERNAL_VBUS_DIVIDER, reg);
125 spin_unlock_irqrestore(&usbmisc->lock, flags);
126 usleep_range(5000, 10000); /* needed to stabilize voltage */
132 static int usbmisc_imx27_init(struct imx_usbmisc_data *data)
134 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
138 switch (data->index) {
140 val = MX27_OTG_PM_BIT;
143 val = MX27_H1_PM_BIT;
146 val = MX27_H2_PM_BIT;
152 spin_lock_irqsave(&usbmisc->lock, flags);
153 if (data->disable_oc)
154 val = readl(usbmisc->base) | val;
156 val = readl(usbmisc->base) & ~val;
157 writel(val, usbmisc->base);
158 spin_unlock_irqrestore(&usbmisc->lock, flags);
163 static int usbmisc_imx53_init(struct imx_usbmisc_data *data)
165 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
166 void __iomem *reg = NULL;
173 /* Select a 24 MHz reference clock for the PHY */
174 val = readl(usbmisc->base + MX53_USB_OTG_PHY_CTRL_1_OFFSET);
175 val &= ~MX53_USB_PHYCTRL1_PLLDIV_MASK;
176 val |= MX53_USB_PLL_DIV_24_MHZ;
177 writel(val, usbmisc->base + MX53_USB_OTG_PHY_CTRL_1_OFFSET);
179 if (data->disable_oc) {
180 spin_lock_irqsave(&usbmisc->lock, flags);
181 switch (data->index) {
183 reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_0_OFFSET;
184 val = readl(reg) | MX53_BM_OVER_CUR_DIS_OTG;
187 reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_0_OFFSET;
188 val = readl(reg) | MX53_BM_OVER_CUR_DIS_H1;
191 reg = usbmisc->base + MX53_USB_UH2_CTRL_OFFSET;
192 val = readl(reg) | MX53_BM_OVER_CUR_DIS_UHx;
195 reg = usbmisc->base + MX53_USB_UH3_CTRL_OFFSET;
196 val = readl(reg) | MX53_BM_OVER_CUR_DIS_UHx;
201 spin_unlock_irqrestore(&usbmisc->lock, flags);
207 static int usbmisc_imx6q_init(struct imx_usbmisc_data *data)
209 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
216 if (data->disable_oc) {
217 spin_lock_irqsave(&usbmisc->lock, flags);
218 reg = readl(usbmisc->base + data->index * 4);
219 writel(reg | MX6_BM_OVER_CUR_DIS,
220 usbmisc->base + data->index * 4);
221 spin_unlock_irqrestore(&usbmisc->lock, flags);
227 static int usbmisc_vf610_init(struct imx_usbmisc_data *data)
229 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
233 * Vybrid only has one misc register set, but in two different
234 * areas. These is reflected in two instances of this driver.
236 if (data->index >= 1)
239 if (data->disable_oc) {
240 reg = readl(usbmisc->base);
241 writel(reg | VF610_OVER_CUR_DIS, usbmisc->base);
247 static const struct usbmisc_ops imx25_usbmisc_ops = {
248 .init = usbmisc_imx25_init,
249 .post = usbmisc_imx25_post,
252 static const struct usbmisc_ops imx27_usbmisc_ops = {
253 .init = usbmisc_imx27_init,
256 static const struct usbmisc_ops imx53_usbmisc_ops = {
257 .init = usbmisc_imx53_init,
260 static const struct usbmisc_ops imx6q_usbmisc_ops = {
261 .init = usbmisc_imx6q_init,
264 static const struct usbmisc_ops vf610_usbmisc_ops = {
265 .init = usbmisc_vf610_init,
268 int imx_usbmisc_init(struct imx_usbmisc_data *data)
270 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
272 if (!usbmisc->ops->init)
274 return usbmisc->ops->init(data);
276 EXPORT_SYMBOL_GPL(imx_usbmisc_init);
278 int imx_usbmisc_init_post(struct imx_usbmisc_data *data)
280 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
282 if (!usbmisc->ops->post)
284 return usbmisc->ops->post(data);
286 EXPORT_SYMBOL_GPL(imx_usbmisc_init_post);
288 static const struct of_device_id usbmisc_imx_dt_ids[] = {
290 .compatible = "fsl,imx25-usbmisc",
291 .data = &imx25_usbmisc_ops,
294 .compatible = "fsl,imx35-usbmisc",
295 .data = &imx25_usbmisc_ops,
298 .compatible = "fsl,imx27-usbmisc",
299 .data = &imx27_usbmisc_ops,
302 .compatible = "fsl,imx51-usbmisc",
303 .data = &imx53_usbmisc_ops,
306 .compatible = "fsl,imx53-usbmisc",
307 .data = &imx53_usbmisc_ops,
310 .compatible = "fsl,imx6q-usbmisc",
311 .data = &imx6q_usbmisc_ops,
314 .compatible = "fsl,vf610-usbmisc",
315 .data = &vf610_usbmisc_ops,
319 MODULE_DEVICE_TABLE(of, usbmisc_imx_dt_ids);
321 static int usbmisc_imx_probe(struct platform_device *pdev)
323 struct resource *res;
324 struct imx_usbmisc *data;
326 struct of_device_id *tmp_dev;
328 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
332 spin_lock_init(&data->lock);
334 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
335 data->base = devm_ioremap_resource(&pdev->dev, res);
336 if (IS_ERR(data->base))
337 return PTR_ERR(data->base);
339 data->clk = devm_clk_get(&pdev->dev, NULL);
340 if (IS_ERR(data->clk)) {
342 "failed to get clock, err=%ld\n", PTR_ERR(data->clk));
343 return PTR_ERR(data->clk);
346 ret = clk_prepare_enable(data->clk);
349 "clk_prepare_enable failed, err=%d\n", ret);
353 tmp_dev = (struct of_device_id *)
354 of_match_device(usbmisc_imx_dt_ids, &pdev->dev);
355 data->ops = (const struct usbmisc_ops *)tmp_dev->data;
356 platform_set_drvdata(pdev, data);
361 static int usbmisc_imx_remove(struct platform_device *pdev)
363 struct imx_usbmisc *usbmisc = dev_get_drvdata(&pdev->dev);
364 clk_disable_unprepare(usbmisc->clk);
368 static struct platform_driver usbmisc_imx_driver = {
369 .probe = usbmisc_imx_probe,
370 .remove = usbmisc_imx_remove,
372 .name = "usbmisc_imx",
373 .of_match_table = usbmisc_imx_dt_ids,
377 module_platform_driver(usbmisc_imx_driver);
379 MODULE_ALIAS("platform:usbmisc-imx");
380 MODULE_LICENSE("GPL v2");
381 MODULE_DESCRIPTION("driver for imx usb non-core registers");
382 MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");