1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Setup platform devices needed by the Freescale multi-port host
4 * and/or dual-role USB controller modules based on the description
5 * in flat device tree.
6 */
7
8 #include <linux/kernel.h>
9 #include <linux/platform_device.h>
10 #include <linux/fsl_devices.h>
11 #include <linux/err.h>
12 #include <linux/io.h>
13 #include <linux/of.h>
14 #include <linux/of_device.h>
15 #include <linux/clk.h>
16 #include <linux/module.h>
17 #include <linux/dma-mapping.h>
18
19 struct fsl_usb2_dev_data {
20 char *dr_mode; /* controller mode */
21 char *drivers[3]; /* drivers to instantiate for this mode */
22 enum fsl_usb2_operating_modes op_mode; /* operating mode */
23 };
24
25 static struct fsl_usb2_dev_data dr_mode_data[] = {
26 {
27 .dr_mode = "host",
28 .drivers = { "fsl-ehci", NULL, NULL, },
29 .op_mode = FSL_USB2_DR_HOST,
30 },
31 {
32 .dr_mode = "otg",
33 .drivers = { "fsl-usb2-otg", "fsl-ehci", "fsl-usb2-udc", },
34 .op_mode = FSL_USB2_DR_OTG,
35 },
36 {
37 .dr_mode = "peripheral",
38 .drivers = { "fsl-usb2-udc", NULL, NULL, },
39 .op_mode = FSL_USB2_DR_DEVICE,
40 },
41 };
42
get_dr_mode_data(struct device_node * np)43 static struct fsl_usb2_dev_data *get_dr_mode_data(struct device_node *np)
44 {
45 const unsigned char *prop;
46 int i;
47
48 prop = of_get_property(np, "dr_mode", NULL);
49 if (prop) {
50 for (i = 0; i < ARRAY_SIZE(dr_mode_data); i++) {
51 if (!strcmp(prop, dr_mode_data[i].dr_mode))
52 return &dr_mode_data[i];
53 }
54 }
55 pr_warn("%pOF: Invalid 'dr_mode' property, fallback to host mode\n",
56 np);
57 return &dr_mode_data[0]; /* mode not specified, use host */
58 }
59
determine_usb_phy(const char * phy_type)60 static enum fsl_usb2_phy_modes determine_usb_phy(const char *phy_type)
61 {
62 if (!phy_type)
63 return FSL_USB2_PHY_NONE;
64 if (!strcasecmp(phy_type, "ulpi"))
65 return FSL_USB2_PHY_ULPI;
66 if (!strcasecmp(phy_type, "utmi"))
67 return FSL_USB2_PHY_UTMI;
68 if (!strcasecmp(phy_type, "utmi_wide"))
69 return FSL_USB2_PHY_UTMI_WIDE;
70 if (!strcasecmp(phy_type, "utmi_dual"))
71 return FSL_USB2_PHY_UTMI_DUAL;
72 if (!strcasecmp(phy_type, "serial"))
73 return FSL_USB2_PHY_SERIAL;
74
75 return FSL_USB2_PHY_NONE;
76 }
77
fsl_usb2_device_register(struct platform_device * ofdev,struct fsl_usb2_platform_data * pdata,const char * name,int id)78 static struct platform_device *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
98 if (!pdev->dev.dma_mask) {
99 pdev->dev.dma_mask = &ofdev->dev.coherent_dma_mask;
100 } else {
101 retval = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
102 if (retval)
103 goto error;
104 }
105
106 retval = platform_device_add_data(pdev, pdata, sizeof(*pdata));
107 if (retval)
108 goto error;
109
110 if (num) {
111 retval = platform_device_add_resources(pdev, res, num);
112 if (retval)
113 goto error;
114 }
115
116 device_set_of_node_from_dev(&pdev->dev, &ofdev->dev);
117
118 retval = platform_device_add(pdev);
119 if (retval)
120 goto error;
121
122 return pdev;
123
124 error:
125 platform_device_put(pdev);
126 return ERR_PTR(retval);
127 }
128
129 static const struct of_device_id fsl_usb2_mph_dr_of_match[];
130
usb_get_ver_info(struct device_node * np)131 static enum fsl_usb2_controller_ver usb_get_ver_info(struct device_node *np)
132 {
133 enum fsl_usb2_controller_ver ver = FSL_USB_VER_NONE;
134
135 /*
136 * returns 1 for usb controller version 1.6
137 * returns 2 for usb controller version 2.2
138 * returns 3 for usb controller version 2.4
139 * returns 4 for usb controller version 2.5
140 * returns 0 otherwise
141 */
142 if (of_device_is_compatible(np, "fsl-usb2-dr")) {
143 if (of_device_is_compatible(np, "fsl-usb2-dr-v1.6"))
144 ver = FSL_USB_VER_1_6;
145 else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.2"))
146 ver = FSL_USB_VER_2_2;
147 else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.4"))
148 ver = FSL_USB_VER_2_4;
149 else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.5"))
150 ver = FSL_USB_VER_2_5;
151 else /* for previous controller versions */
152 ver = FSL_USB_VER_OLD;
153
154 if (ver > FSL_USB_VER_NONE)
155 return ver;
156 }
157
158 if (of_device_is_compatible(np, "fsl,mpc5121-usb2-dr"))
159 return FSL_USB_VER_OLD;
160
161 if (of_device_is_compatible(np, "fsl-usb2-mph")) {
162 if (of_device_is_compatible(np, "fsl-usb2-mph-v1.6"))
163 ver = FSL_USB_VER_1_6;
164 else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.2"))
165 ver = FSL_USB_VER_2_2;
166 else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.4"))
167 ver = FSL_USB_VER_2_4;
168 else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.5"))
169 ver = FSL_USB_VER_2_5;
170 else /* for previous controller versions */
171 ver = FSL_USB_VER_OLD;
172 }
173
174 return ver;
175 }
176
fsl_usb2_mph_dr_of_probe(struct platform_device * ofdev)177 static int fsl_usb2_mph_dr_of_probe(struct platform_device *ofdev)
178 {
179 struct device_node *np = ofdev->dev.of_node;
180 struct platform_device *usb_dev;
181 struct fsl_usb2_platform_data data, *pdata;
182 struct fsl_usb2_dev_data *dev_data;
183 const struct of_device_id *match;
184 const unsigned char *prop;
185 static unsigned int idx;
186 int i;
187
188 if (!of_device_is_available(np))
189 return -ENODEV;
190
191 match = of_match_device(fsl_usb2_mph_dr_of_match, &ofdev->dev);
192 if (!match)
193 return -ENODEV;
194
195 pdata = &data;
196 if (match->data)
197 memcpy(pdata, match->data, sizeof(data));
198 else
199 memset(pdata, 0, sizeof(data));
200
201 dev_data = get_dr_mode_data(np);
202
203 if (of_device_is_compatible(np, "fsl-usb2-mph")) {
204 if (of_property_present(np, "port0"))
205 pdata->port_enables |= FSL_USB2_PORT0_ENABLED;
206
207 if (of_property_present(np, "port1"))
208 pdata->port_enables |= FSL_USB2_PORT1_ENABLED;
209
210 pdata->operating_mode = FSL_USB2_MPH_HOST;
211 } else {
212 pdata->invert_drvvbus = of_property_read_bool(np, "fsl,invert-drvvbus");
213 pdata->invert_pwr_fault = of_property_read_bool(np, "fsl,invert-pwr-fault");
214
215 /* setup mode selected in the device tree */
216 pdata->operating_mode = dev_data->op_mode;
217 }
218
219 prop = of_get_property(np, "phy_type", NULL);
220 pdata->phy_mode = determine_usb_phy(prop);
221 pdata->controller_ver = usb_get_ver_info(np);
222
223 /* Activate Erratum by reading property in device tree */
224 pdata->has_fsl_erratum_a007792 =
225 of_property_read_bool(np, "fsl,usb-erratum-a007792");
226 pdata->has_fsl_erratum_a005275 =
227 of_property_read_bool(np, "fsl,usb-erratum-a005275");
228 pdata->has_fsl_erratum_a005697 =
229 of_property_read_bool(np, "fsl,usb_erratum-a005697");
230 pdata->has_fsl_erratum_a006918 =
231 of_property_read_bool(np, "fsl,usb_erratum-a006918");
232 pdata->has_fsl_erratum_14 =
233 of_property_read_bool(np, "fsl,usb_erratum-14");
234
235 /*
236 * Determine whether phy_clk_valid needs to be checked
237 * by reading property in device tree
238 */
239 pdata->check_phy_clk_valid =
240 of_property_read_bool(np, "phy-clk-valid");
241
242 if (pdata->have_sysif_regs) {
243 if (pdata->controller_ver == FSL_USB_VER_NONE) {
244 dev_warn(&ofdev->dev, "Could not get controller version\n");
245 return -ENODEV;
246 }
247 }
248
249 for (i = 0; i < ARRAY_SIZE(dev_data->drivers); i++) {
250 if (!dev_data->drivers[i])
251 continue;
252 usb_dev = fsl_usb2_device_register(ofdev, pdata,
253 dev_data->drivers[i], idx);
254 if (IS_ERR(usb_dev)) {
255 dev_err(&ofdev->dev, "Can't register usb device\n");
256 return PTR_ERR(usb_dev);
257 }
258 }
259 idx++;
260 return 0;
261 }
262
__unregister_subdev(struct device * dev,void * d)263 static int __unregister_subdev(struct device *dev, void *d)
264 {
265 platform_device_unregister(to_platform_device(dev));
266 return 0;
267 }
268
fsl_usb2_mph_dr_of_remove(struct platform_device * ofdev)269 static void fsl_usb2_mph_dr_of_remove(struct platform_device *ofdev)
270 {
271 device_for_each_child(&ofdev->dev, NULL, __unregister_subdev);
272 }
273
274 #ifdef CONFIG_PPC_MPC512x
275
276 #define USBGENCTRL 0x200 /* NOTE: big endian */
277 #define GC_WU_INT_CLR (1 << 5) /* Wakeup int clear */
278 #define GC_ULPI_SEL (1 << 4) /* ULPI i/f select (usb0 only)*/
279 #define GC_PPP (1 << 3) /* Inv. Port Power Polarity */
280 #define GC_PFP (1 << 2) /* Inv. Power Fault Polarity */
281 #define GC_WU_ULPI_EN (1 << 1) /* Wakeup on ULPI event */
282 #define GC_WU_IE (1 << 1) /* Wakeup interrupt enable */
283
284 #define ISIPHYCTRL 0x204 /* NOTE: big endian */
285 #define PHYCTRL_PHYE (1 << 4) /* On-chip UTMI PHY enable */
286 #define PHYCTRL_BSENH (1 << 3) /* Bit Stuff Enable High */
287 #define PHYCTRL_BSEN (1 << 2) /* Bit Stuff Enable */
288 #define PHYCTRL_LSFE (1 << 1) /* Line State Filter Enable */
289 #define PHYCTRL_PXE (1 << 0) /* PHY oscillator enable */
290
fsl_usb2_mpc5121_init(struct platform_device * pdev)291 static int fsl_usb2_mpc5121_init(struct platform_device *pdev)
292 {
293 struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
294 struct clk *clk;
295 int err;
296
297 clk = devm_clk_get(pdev->dev.parent, "ipg");
298 if (IS_ERR(clk)) {
299 dev_err(&pdev->dev, "failed to get clk\n");
300 return PTR_ERR(clk);
301 }
302 err = clk_prepare_enable(clk);
303 if (err) {
304 dev_err(&pdev->dev, "failed to enable clk\n");
305 return err;
306 }
307 pdata->clk = clk;
308
309 if (pdata->phy_mode == FSL_USB2_PHY_UTMI_WIDE) {
310 u32 reg = 0;
311
312 if (pdata->invert_drvvbus)
313 reg |= GC_PPP;
314
315 if (pdata->invert_pwr_fault)
316 reg |= GC_PFP;
317
318 out_be32(pdata->regs + ISIPHYCTRL, PHYCTRL_PHYE | PHYCTRL_PXE);
319 out_be32(pdata->regs + USBGENCTRL, reg);
320 }
321 return 0;
322 }
323
fsl_usb2_mpc5121_exit(struct platform_device * pdev)324 static void fsl_usb2_mpc5121_exit(struct platform_device *pdev)
325 {
326 struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
327
328 pdata->regs = NULL;
329
330 if (pdata->clk)
331 clk_disable_unprepare(pdata->clk);
332 }
333
334 static struct fsl_usb2_platform_data fsl_usb2_mpc5121_pd = {
335 .big_endian_desc = 1,
336 .big_endian_mmio = 1,
337 .es = 1,
338 .have_sysif_regs = 0,
339 .le_setup_buf = 1,
340 .init = fsl_usb2_mpc5121_init,
341 .exit = fsl_usb2_mpc5121_exit,
342 };
343 #endif /* CONFIG_PPC_MPC512x */
344
345 static struct fsl_usb2_platform_data fsl_usb2_mpc8xxx_pd = {
346 .have_sysif_regs = 1,
347 };
348
349 static const struct of_device_id fsl_usb2_mph_dr_of_match[] = {
350 { .compatible = "fsl-usb2-mph", .data = &fsl_usb2_mpc8xxx_pd, },
351 { .compatible = "fsl-usb2-dr", .data = &fsl_usb2_mpc8xxx_pd, },
352 #ifdef CONFIG_PPC_MPC512x
353 { .compatible = "fsl,mpc5121-usb2-dr", .data = &fsl_usb2_mpc5121_pd, },
354 #endif
355 {},
356 };
357 MODULE_DEVICE_TABLE(of, fsl_usb2_mph_dr_of_match);
358
359 static struct platform_driver fsl_usb2_mph_dr_driver = {
360 .driver = {
361 .name = "fsl-usb2-mph-dr",
362 .of_match_table = fsl_usb2_mph_dr_of_match,
363 },
364 .probe = fsl_usb2_mph_dr_of_probe,
365 .remove_new = fsl_usb2_mph_dr_of_remove,
366 };
367
368 module_platform_driver(fsl_usb2_mph_dr_driver);
369
370 MODULE_DESCRIPTION("FSL MPH DR OF devices driver");
371 MODULE_AUTHOR("Anatolij Gustschin <agust@denx.de>");
372 MODULE_LICENSE("GPL");
373