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1/*
2 * Setup platform devices needed by the Freescale multi-port host
3 * and/or dual-role USB controller modules based on the description
4 * in flat device tree.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
10 */
11
12#include <linux/kernel.h>
13#include <linux/platform_device.h>
14#include <linux/fsl_devices.h>
15#include <linux/err.h>
16#include <linux/io.h>
17#include <linux/of_platform.h>
18#include <linux/clk.h>
19#include <linux/module.h>
20
21struct fsl_usb2_dev_data {
22 char *dr_mode; /* controller mode */
23 char *drivers[3]; /* drivers to instantiate for this mode */
24 enum fsl_usb2_operating_modes op_mode; /* operating mode */
25};
26
27struct fsl_usb2_dev_data dr_mode_data[] __devinitdata = {
28 {
29 .dr_mode = "host",
30 .drivers = { "fsl-ehci", NULL, NULL, },
31 .op_mode = FSL_USB2_DR_HOST,
32 },
33 {
34 .dr_mode = "otg",
35 .drivers = { "fsl-usb2-otg", "fsl-ehci", "fsl-usb2-udc", },
36 .op_mode = FSL_USB2_DR_OTG,
37 },
38 {
39 .dr_mode = "peripheral",
40 .drivers = { "fsl-usb2-udc", NULL, NULL, },
41 .op_mode = FSL_USB2_DR_DEVICE,
42 },
43};
44
45struct fsl_usb2_dev_data * __devinit get_dr_mode_data(struct device_node *np)
46{
47 const unsigned char *prop;
48 int i;
49
50 prop = of_get_property(np, "dr_mode", NULL);
51 if (prop) {
52 for (i = 0; i < ARRAY_SIZE(dr_mode_data); i++) {
53 if (!strcmp(prop, dr_mode_data[i].dr_mode))
54 return &dr_mode_data[i];
55 }
56 }
57 pr_warn("%s: Invalid 'dr_mode' property, fallback to host mode\n",
58 np->full_name);
59 return &dr_mode_data[0]; /* mode not specified, use host */
60}
61
62static enum fsl_usb2_phy_modes __devinit determine_usb_phy(const char *phy_type)
63{
64 if (!phy_type)
65 return FSL_USB2_PHY_NONE;
66 if (!strcasecmp(phy_type, "ulpi"))
67 return FSL_USB2_PHY_ULPI;
68 if (!strcasecmp(phy_type, "utmi"))
69 return FSL_USB2_PHY_UTMI;
70 if (!strcasecmp(phy_type, "utmi_wide"))
71 return FSL_USB2_PHY_UTMI_WIDE;
72 if (!strcasecmp(phy_type, "serial"))
73 return FSL_USB2_PHY_SERIAL;
74
75 return FSL_USB2_PHY_NONE;
76}
77
78struct platform_device * __devinit fsl_usb2_device_register(
79 struct platform_device *ofdev,
80 struct fsl_usb2_platform_data *pdata,
81 const char *name, int id)
82{
83 struct platform_device *pdev;
84 const struct resource *res = ofdev->resource;
85 unsigned int num = ofdev->num_resources;
86 int retval;
87
88 pdev = platform_device_alloc(name, id);
89 if (!pdev) {
90 retval = -ENOMEM;
91 goto error;
92 }
93
94 pdev->dev.parent = &ofdev->dev;
95
96 pdev->dev.coherent_dma_mask = ofdev->dev.coherent_dma_mask;
97 *pdev->dev.dma_mask = *ofdev->dev.dma_mask;
98
99 retval = platform_device_add_data(pdev, pdata, sizeof(*pdata));
100 if (retval)
101 goto error;
102
103 if (num) {
104 retval = platform_device_add_resources(pdev, res, num);
105 if (retval)
106 goto error;
107 }
108
109 retval = platform_device_add(pdev);
110 if (retval)
111 goto error;
112
113 return pdev;
114
115error:
116 platform_device_put(pdev);
117 return ERR_PTR(retval);
118}
119
120static const struct of_device_id fsl_usb2_mph_dr_of_match[];
121
122static int usb_get_ver_info(struct device_node *np)
123{
124 int ver = -1;
125
126 /*
127 * returns 1 for usb controller version 1.6
128 * returns 2 for usb controller version 2.2
129 * returns 0 otherwise
130 */
131 if (of_device_is_compatible(np, "fsl-usb2-dr")) {
132 if (of_device_is_compatible(np, "fsl-usb2-dr-v1.6"))
133 ver = FSL_USB_VER_1_6;
134 else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.2"))
135 ver = FSL_USB_VER_2_2;
136 else /* for previous controller versions */
137 ver = FSL_USB_VER_OLD;
138
139 if (ver > -1)
140 return ver;
141 }
142
143 if (of_device_is_compatible(np, "fsl-usb2-mph")) {
144 if (of_device_is_compatible(np, "fsl-usb2-mph-v1.6"))
145 ver = FSL_USB_VER_1_6;
146 else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.2"))
147 ver = FSL_USB_VER_2_2;
148 else /* for previous controller versions */
149 ver = FSL_USB_VER_OLD;
150 }
151
152 return ver;
153}
154
155static int __devinit fsl_usb2_mph_dr_of_probe(struct platform_device *ofdev)
156{
157 struct device_node *np = ofdev->dev.of_node;
158 struct platform_device *usb_dev;
159 struct fsl_usb2_platform_data data, *pdata;
160 struct fsl_usb2_dev_data *dev_data;
161 const struct of_device_id *match;
162 const unsigned char *prop;
163 static unsigned int idx;
164 int i;
165
166 if (!of_device_is_available(np))
167 return -ENODEV;
168
169 match = of_match_device(fsl_usb2_mph_dr_of_match, &ofdev->dev);
170 if (!match)
171 return -ENODEV;
172
173 pdata = &data;
174 if (match->data)
175 memcpy(pdata, match->data, sizeof(data));
176 else
177 memset(pdata, 0, sizeof(data));
178
179 dev_data = get_dr_mode_data(np);
180
181 if (of_device_is_compatible(np, "fsl-usb2-mph")) {
182 if (of_get_property(np, "port0", NULL))
183 pdata->port_enables |= FSL_USB2_PORT0_ENABLED;
184
185 if (of_get_property(np, "port1", NULL))
186 pdata->port_enables |= FSL_USB2_PORT1_ENABLED;
187
188 pdata->operating_mode = FSL_USB2_MPH_HOST;
189 } else {
190 if (of_get_property(np, "fsl,invert-drvvbus", NULL))
191 pdata->invert_drvvbus = 1;
192
193 if (of_get_property(np, "fsl,invert-pwr-fault", NULL))
194 pdata->invert_pwr_fault = 1;
195
196 /* setup mode selected in the device tree */
197 pdata->operating_mode = dev_data->op_mode;
198 }
199
200 prop = of_get_property(np, "phy_type", NULL);
201 pdata->phy_mode = determine_usb_phy(prop);
202 pdata->controller_ver = usb_get_ver_info(np);
203
204 if (pdata->have_sysif_regs) {
205 if (pdata->controller_ver < 0) {
206 dev_warn(&ofdev->dev, "Could not get controller version\n");
207 return -ENODEV;
208 }
209 }
210
211 for (i = 0; i < ARRAY_SIZE(dev_data->drivers); i++) {
212 if (!dev_data->drivers[i])
213 continue;
214 usb_dev = fsl_usb2_device_register(ofdev, pdata,
215 dev_data->drivers[i], idx);
216 if (IS_ERR(usb_dev)) {
217 dev_err(&ofdev->dev, "Can't register usb device\n");
218 return PTR_ERR(usb_dev);
219 }
220 }
221 idx++;
222 return 0;
223}
224
225static int __devexit __unregister_subdev(struct device *dev, void *d)
226{
227 platform_device_unregister(to_platform_device(dev));
228 return 0;
229}
230
231static int __devexit fsl_usb2_mph_dr_of_remove(struct platform_device *ofdev)
232{
233 device_for_each_child(&ofdev->dev, NULL, __unregister_subdev);
234 return 0;
235}
236
237#ifdef CONFIG_PPC_MPC512x
238
239#define USBGENCTRL 0x200 /* NOTE: big endian */
240#define GC_WU_INT_CLR (1 << 5) /* Wakeup int clear */
241#define GC_ULPI_SEL (1 << 4) /* ULPI i/f select (usb0 only)*/
242#define GC_PPP (1 << 3) /* Inv. Port Power Polarity */
243#define GC_PFP (1 << 2) /* Inv. Power Fault Polarity */
244#define GC_WU_ULPI_EN (1 << 1) /* Wakeup on ULPI event */
245#define GC_WU_IE (1 << 1) /* Wakeup interrupt enable */
246
247#define ISIPHYCTRL 0x204 /* NOTE: big endian */
248#define PHYCTRL_PHYE (1 << 4) /* On-chip UTMI PHY enable */
249#define PHYCTRL_BSENH (1 << 3) /* Bit Stuff Enable High */
250#define PHYCTRL_BSEN (1 << 2) /* Bit Stuff Enable */
251#define PHYCTRL_LSFE (1 << 1) /* Line State Filter Enable */
252#define PHYCTRL_PXE (1 << 0) /* PHY oscillator enable */
253
254int fsl_usb2_mpc5121_init(struct platform_device *pdev)
255{
256 struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
257 struct clk *clk;
258 char clk_name[10];
259 int base, clk_num;
260
261 base = pdev->resource->start & 0xf000;
262 if (base == 0x3000)
263 clk_num = 1;
264 else if (base == 0x4000)
265 clk_num = 2;
266 else
267 return -ENODEV;
268
269 snprintf(clk_name, sizeof(clk_name), "usb%d_clk", clk_num);
270 clk = clk_get(&pdev->dev, clk_name);
271 if (IS_ERR(clk)) {
272 dev_err(&pdev->dev, "failed to get clk\n");
273 return PTR_ERR(clk);
274 }
275
276 clk_enable(clk);
277 pdata->clk = clk;
278
279 if (pdata->phy_mode == FSL_USB2_PHY_UTMI_WIDE) {
280 u32 reg = 0;
281
282 if (pdata->invert_drvvbus)
283 reg |= GC_PPP;
284
285 if (pdata->invert_pwr_fault)
286 reg |= GC_PFP;
287
288 out_be32(pdata->regs + ISIPHYCTRL, PHYCTRL_PHYE | PHYCTRL_PXE);
289 out_be32(pdata->regs + USBGENCTRL, reg);
290 }
291 return 0;
292}
293
294static void fsl_usb2_mpc5121_exit(struct platform_device *pdev)
295{
296 struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
297
298 pdata->regs = NULL;
299
300 if (pdata->clk) {
301 clk_disable(pdata->clk);
302 clk_put(pdata->clk);
303 }
304}
305
306static struct fsl_usb2_platform_data fsl_usb2_mpc5121_pd = {
307 .big_endian_desc = 1,
308 .big_endian_mmio = 1,
309 .es = 1,
310 .have_sysif_regs = 0,
311 .le_setup_buf = 1,
312 .init = fsl_usb2_mpc5121_init,
313 .exit = fsl_usb2_mpc5121_exit,
314};
315#endif /* CONFIG_PPC_MPC512x */
316
317static struct fsl_usb2_platform_data fsl_usb2_mpc8xxx_pd = {
318 .have_sysif_regs = 1,
319};
320
321static const struct of_device_id fsl_usb2_mph_dr_of_match[] = {
322 { .compatible = "fsl-usb2-mph", .data = &fsl_usb2_mpc8xxx_pd, },
323 { .compatible = "fsl-usb2-dr", .data = &fsl_usb2_mpc8xxx_pd, },
324#ifdef CONFIG_PPC_MPC512x
325 { .compatible = "fsl,mpc5121-usb2-dr", .data = &fsl_usb2_mpc5121_pd, },
326#endif
327 {},
328};
329
330static struct platform_driver fsl_usb2_mph_dr_driver = {
331 .driver = {
332 .name = "fsl-usb2-mph-dr",
333 .owner = THIS_MODULE,
334 .of_match_table = fsl_usb2_mph_dr_of_match,
335 },
336 .probe = fsl_usb2_mph_dr_of_probe,
337 .remove = __devexit_p(fsl_usb2_mph_dr_of_remove),
338};
339
340module_platform_driver(fsl_usb2_mph_dr_driver);
341
342MODULE_DESCRIPTION("FSL MPH DR OF devices driver");
343MODULE_AUTHOR("Anatolij Gustschin <agust@denx.de>");
344MODULE_LICENSE("GPL");