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Linux/drivers/usb/host/fsl-mph-dr-of.c

  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 
 21 struct 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 
 27 static struct fsl_usb2_dev_data dr_mode_data[] = {
 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 
 45 static struct fsl_usb2_dev_data *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 
 62 static enum fsl_usb2_phy_modes 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, "utmi_dual"))
 73                 return FSL_USB2_PHY_UTMI_DUAL;
 74         if (!strcasecmp(phy_type, "serial"))
 75                 return FSL_USB2_PHY_SERIAL;
 76 
 77         return FSL_USB2_PHY_NONE;
 78 }
 79 
 80 static struct platform_device *fsl_usb2_device_register(
 81                                         struct platform_device *ofdev,
 82                                         struct fsl_usb2_platform_data *pdata,
 83                                         const char *name, int id)
 84 {
 85         struct platform_device *pdev;
 86         const struct resource *res = ofdev->resource;
 87         unsigned int num = ofdev->num_resources;
 88         int retval;
 89 
 90         pdev = platform_device_alloc(name, id);
 91         if (!pdev) {
 92                 retval = -ENOMEM;
 93                 goto error;
 94         }
 95 
 96         pdev->dev.parent = &ofdev->dev;
 97 
 98         pdev->dev.coherent_dma_mask = ofdev->dev.coherent_dma_mask;
 99         *pdev->dev.dma_mask = *ofdev->dev.dma_mask;
100 
101         retval = platform_device_add_data(pdev, pdata, sizeof(*pdata));
102         if (retval)
103                 goto error;
104 
105         if (num) {
106                 retval = platform_device_add_resources(pdev, res, num);
107                 if (retval)
108                         goto error;
109         }
110 
111         retval = platform_device_add(pdev);
112         if (retval)
113                 goto error;
114 
115         return pdev;
116 
117 error:
118         platform_device_put(pdev);
119         return ERR_PTR(retval);
120 }
121 
122 static const struct of_device_id fsl_usb2_mph_dr_of_match[];
123 
124 static enum fsl_usb2_controller_ver usb_get_ver_info(struct device_node *np)
125 {
126         enum fsl_usb2_controller_ver ver = FSL_USB_VER_NONE;
127 
128         /*
129          * returns 1 for usb controller version 1.6
130          * returns 2 for usb controller version 2.2
131          * returns 3 for usb controller version 2.4
132          * returns 4 for usb controller version 2.5
133          * returns 0 otherwise
134          */
135         if (of_device_is_compatible(np, "fsl-usb2-dr")) {
136                 if (of_device_is_compatible(np, "fsl-usb2-dr-v1.6"))
137                         ver = FSL_USB_VER_1_6;
138                 else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.2"))
139                         ver = FSL_USB_VER_2_2;
140                 else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.4"))
141                         ver = FSL_USB_VER_2_4;
142                 else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.5"))
143                         ver = FSL_USB_VER_2_5;
144                 else /* for previous controller versions */
145                         ver = FSL_USB_VER_OLD;
146 
147                 if (ver > FSL_USB_VER_NONE)
148                         return ver;
149         }
150 
151         if (of_device_is_compatible(np, "fsl,mpc5121-usb2-dr"))
152                 return FSL_USB_VER_OLD;
153 
154         if (of_device_is_compatible(np, "fsl-usb2-mph")) {
155                 if (of_device_is_compatible(np, "fsl-usb2-mph-v1.6"))
156                         ver = FSL_USB_VER_1_6;
157                 else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.2"))
158                         ver = FSL_USB_VER_2_2;
159                 else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.4"))
160                         ver = FSL_USB_VER_2_4;
161                 else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.5"))
162                         ver = FSL_USB_VER_2_5;
163                 else /* for previous controller versions */
164                         ver = FSL_USB_VER_OLD;
165         }
166 
167         return ver;
168 }
169 
170 static int fsl_usb2_mph_dr_of_probe(struct platform_device *ofdev)
171 {
172         struct device_node *np = ofdev->dev.of_node;
173         struct platform_device *usb_dev;
174         struct fsl_usb2_platform_data data, *pdata;
175         struct fsl_usb2_dev_data *dev_data;
176         const struct of_device_id *match;
177         const unsigned char *prop;
178         static unsigned int idx;
179         int i;
180 
181         if (!of_device_is_available(np))
182                 return -ENODEV;
183 
184         match = of_match_device(fsl_usb2_mph_dr_of_match, &ofdev->dev);
185         if (!match)
186                 return -ENODEV;
187 
188         pdata = &data;
189         if (match->data)
190                 memcpy(pdata, match->data, sizeof(data));
191         else
192                 memset(pdata, 0, sizeof(data));
193 
194         dev_data = get_dr_mode_data(np);
195 
196         if (of_device_is_compatible(np, "fsl-usb2-mph")) {
197                 if (of_get_property(np, "port0", NULL))
198                         pdata->port_enables |= FSL_USB2_PORT0_ENABLED;
199 
200                 if (of_get_property(np, "port1", NULL))
201                         pdata->port_enables |= FSL_USB2_PORT1_ENABLED;
202 
203                 pdata->operating_mode = FSL_USB2_MPH_HOST;
204         } else {
205                 if (of_get_property(np, "fsl,invert-drvvbus", NULL))
206                         pdata->invert_drvvbus = 1;
207 
208                 if (of_get_property(np, "fsl,invert-pwr-fault", NULL))
209                         pdata->invert_pwr_fault = 1;
210 
211                 /* setup mode selected in the device tree */
212                 pdata->operating_mode = dev_data->op_mode;
213         }
214 
215         prop = of_get_property(np, "phy_type", NULL);
216         pdata->phy_mode = determine_usb_phy(prop);
217         pdata->controller_ver = usb_get_ver_info(np);
218 
219         /* Activate Erratum by reading property in device tree */
220         if (of_get_property(np, "fsl,usb-erratum-a007792", NULL))
221                 pdata->has_fsl_erratum_a007792 = 1;
222         else
223                 pdata->has_fsl_erratum_a007792 = 0;
224         if (of_get_property(np, "fsl,usb-erratum-a005275", NULL))
225                 pdata->has_fsl_erratum_a005275 = 1;
226         else
227                 pdata->has_fsl_erratum_a005275 = 0;
228 
229         /*
230          * Determine whether phy_clk_valid needs to be checked
231          * by reading property in device tree
232          */
233         if (of_get_property(np, "phy-clk-valid", NULL))
234                 pdata->check_phy_clk_valid = 1;
235         else
236                 pdata->check_phy_clk_valid = 0;
237 
238         if (pdata->have_sysif_regs) {
239                 if (pdata->controller_ver == FSL_USB_VER_NONE) {
240                         dev_warn(&ofdev->dev, "Could not get controller version\n");
241                         return -ENODEV;
242                 }
243         }
244 
245         for (i = 0; i < ARRAY_SIZE(dev_data->drivers); i++) {
246                 if (!dev_data->drivers[i])
247                         continue;
248                 usb_dev = fsl_usb2_device_register(ofdev, pdata,
249                                         dev_data->drivers[i], idx);
250                 if (IS_ERR(usb_dev)) {
251                         dev_err(&ofdev->dev, "Can't register usb device\n");
252                         return PTR_ERR(usb_dev);
253                 }
254         }
255         idx++;
256         return 0;
257 }
258 
259 static int __unregister_subdev(struct device *dev, void *d)
260 {
261         platform_device_unregister(to_platform_device(dev));
262         return 0;
263 }
264 
265 static int fsl_usb2_mph_dr_of_remove(struct platform_device *ofdev)
266 {
267         device_for_each_child(&ofdev->dev, NULL, __unregister_subdev);
268         return 0;
269 }
270 
271 #ifdef CONFIG_PPC_MPC512x
272 
273 #define USBGENCTRL              0x200           /* NOTE: big endian */
274 #define GC_WU_INT_CLR           (1 << 5)        /* Wakeup int clear */
275 #define GC_ULPI_SEL             (1 << 4)        /* ULPI i/f select (usb0 only)*/
276 #define GC_PPP                  (1 << 3)        /* Inv. Port Power Polarity */
277 #define GC_PFP                  (1 << 2)        /* Inv. Power Fault Polarity */
278 #define GC_WU_ULPI_EN           (1 << 1)        /* Wakeup on ULPI event */
279 #define GC_WU_IE                (1 << 1)        /* Wakeup interrupt enable */
280 
281 #define ISIPHYCTRL              0x204           /* NOTE: big endian */
282 #define PHYCTRL_PHYE            (1 << 4)        /* On-chip UTMI PHY enable */
283 #define PHYCTRL_BSENH           (1 << 3)        /* Bit Stuff Enable High */
284 #define PHYCTRL_BSEN            (1 << 2)        /* Bit Stuff Enable */
285 #define PHYCTRL_LSFE            (1 << 1)        /* Line State Filter Enable */
286 #define PHYCTRL_PXE             (1 << 0)        /* PHY oscillator enable */
287 
288 int fsl_usb2_mpc5121_init(struct platform_device *pdev)
289 {
290         struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
291         struct clk *clk;
292         int err;
293 
294         clk = devm_clk_get(pdev->dev.parent, "ipg");
295         if (IS_ERR(clk)) {
296                 dev_err(&pdev->dev, "failed to get clk\n");
297                 return PTR_ERR(clk);
298         }
299         err = clk_prepare_enable(clk);
300         if (err) {
301                 dev_err(&pdev->dev, "failed to enable clk\n");
302                 return err;
303         }
304         pdata->clk = clk;
305 
306         if (pdata->phy_mode == FSL_USB2_PHY_UTMI_WIDE) {
307                 u32 reg = 0;
308 
309                 if (pdata->invert_drvvbus)
310                         reg |= GC_PPP;
311 
312                 if (pdata->invert_pwr_fault)
313                         reg |= GC_PFP;
314 
315                 out_be32(pdata->regs + ISIPHYCTRL, PHYCTRL_PHYE | PHYCTRL_PXE);
316                 out_be32(pdata->regs + USBGENCTRL, reg);
317         }
318         return 0;
319 }
320 
321 static void fsl_usb2_mpc5121_exit(struct platform_device *pdev)
322 {
323         struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
324 
325         pdata->regs = NULL;
326 
327         if (pdata->clk)
328                 clk_disable_unprepare(pdata->clk);
329 }
330 
331 static struct fsl_usb2_platform_data fsl_usb2_mpc5121_pd = {
332         .big_endian_desc = 1,
333         .big_endian_mmio = 1,
334         .es = 1,
335         .have_sysif_regs = 0,
336         .le_setup_buf = 1,
337         .init = fsl_usb2_mpc5121_init,
338         .exit = fsl_usb2_mpc5121_exit,
339 };
340 #endif /* CONFIG_PPC_MPC512x */
341 
342 static struct fsl_usb2_platform_data fsl_usb2_mpc8xxx_pd = {
343         .have_sysif_regs = 1,
344 };
345 
346 static const struct of_device_id fsl_usb2_mph_dr_of_match[] = {
347         { .compatible = "fsl-usb2-mph", .data = &fsl_usb2_mpc8xxx_pd, },
348         { .compatible = "fsl-usb2-dr", .data = &fsl_usb2_mpc8xxx_pd, },
349 #ifdef CONFIG_PPC_MPC512x
350         { .compatible = "fsl,mpc5121-usb2-dr", .data = &fsl_usb2_mpc5121_pd, },
351 #endif
352         {},
353 };
354 MODULE_DEVICE_TABLE(of, fsl_usb2_mph_dr_of_match);
355 
356 static struct platform_driver fsl_usb2_mph_dr_driver = {
357         .driver = {
358                 .name = "fsl-usb2-mph-dr",
359                 .of_match_table = fsl_usb2_mph_dr_of_match,
360         },
361         .probe  = fsl_usb2_mph_dr_of_probe,
362         .remove = fsl_usb2_mph_dr_of_remove,
363 };
364 
365 module_platform_driver(fsl_usb2_mph_dr_driver);
366 
367 MODULE_DESCRIPTION("FSL MPH DR OF devices driver");
368 MODULE_AUTHOR("Anatolij Gustschin <agust@denx.de>");
369 MODULE_LICENSE("GPL");
370 

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