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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 #include <linux/dma-mapping.h>
 21 
 22 struct fsl_usb2_dev_data {
 23         char *dr_mode;          /* controller mode */
 24         char *drivers[3];       /* drivers to instantiate for this mode */
 25         enum fsl_usb2_operating_modes op_mode;  /* operating mode */
 26 };
 27 
 28 static struct fsl_usb2_dev_data dr_mode_data[] = {
 29         {
 30                 .dr_mode = "host",
 31                 .drivers = { "fsl-ehci", NULL, NULL, },
 32                 .op_mode = FSL_USB2_DR_HOST,
 33         },
 34         {
 35                 .dr_mode = "otg",
 36                 .drivers = { "fsl-usb2-otg", "fsl-ehci", "fsl-usb2-udc", },
 37                 .op_mode = FSL_USB2_DR_OTG,
 38         },
 39         {
 40                 .dr_mode = "peripheral",
 41                 .drivers = { "fsl-usb2-udc", NULL, NULL, },
 42                 .op_mode = FSL_USB2_DR_DEVICE,
 43         },
 44 };
 45 
 46 static struct fsl_usb2_dev_data *get_dr_mode_data(struct device_node *np)
 47 {
 48         const unsigned char *prop;
 49         int i;
 50 
 51         prop = of_get_property(np, "dr_mode", NULL);
 52         if (prop) {
 53                 for (i = 0; i < ARRAY_SIZE(dr_mode_data); i++) {
 54                         if (!strcmp(prop, dr_mode_data[i].dr_mode))
 55                                 return &dr_mode_data[i];
 56                 }
 57         }
 58         pr_warn("%s: Invalid 'dr_mode' property, fallback to host mode\n",
 59                 np->full_name);
 60         return &dr_mode_data[0]; /* mode not specified, use host */
 61 }
 62 
 63 static enum fsl_usb2_phy_modes determine_usb_phy(const char *phy_type)
 64 {
 65         if (!phy_type)
 66                 return FSL_USB2_PHY_NONE;
 67         if (!strcasecmp(phy_type, "ulpi"))
 68                 return FSL_USB2_PHY_ULPI;
 69         if (!strcasecmp(phy_type, "utmi"))
 70                 return FSL_USB2_PHY_UTMI;
 71         if (!strcasecmp(phy_type, "utmi_wide"))
 72                 return FSL_USB2_PHY_UTMI_WIDE;
 73         if (!strcasecmp(phy_type, "utmi_dual"))
 74                 return FSL_USB2_PHY_UTMI_DUAL;
 75         if (!strcasecmp(phy_type, "serial"))
 76                 return FSL_USB2_PHY_SERIAL;
 77 
 78         return FSL_USB2_PHY_NONE;
 79 }
 80 
 81 static struct platform_device *fsl_usb2_device_register(
 82                                         struct platform_device *ofdev,
 83                                         struct fsl_usb2_platform_data *pdata,
 84                                         const char *name, int id)
 85 {
 86         struct platform_device *pdev;
 87         const struct resource *res = ofdev->resource;
 88         unsigned int num = ofdev->num_resources;
 89         int retval;
 90 
 91         pdev = platform_device_alloc(name, id);
 92         if (!pdev) {
 93                 retval = -ENOMEM;
 94                 goto error;
 95         }
 96 
 97         pdev->dev.parent = &ofdev->dev;
 98 
 99         pdev->dev.coherent_dma_mask = ofdev->dev.coherent_dma_mask;
100 
101         if (!pdev->dev.dma_mask)
102                 pdev->dev.dma_mask = &ofdev->dev.coherent_dma_mask;
103         else
104                 dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
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         retval = platform_device_add(pdev);
117         if (retval)
118                 goto error;
119 
120         return pdev;
121 
122 error:
123         platform_device_put(pdev);
124         return ERR_PTR(retval);
125 }
126 
127 static const struct of_device_id fsl_usb2_mph_dr_of_match[];
128 
129 static enum fsl_usb2_controller_ver usb_get_ver_info(struct device_node *np)
130 {
131         enum fsl_usb2_controller_ver ver = FSL_USB_VER_NONE;
132 
133         /*
134          * returns 1 for usb controller version 1.6
135          * returns 2 for usb controller version 2.2
136          * returns 3 for usb controller version 2.4
137          * returns 4 for usb controller version 2.5
138          * returns 0 otherwise
139          */
140         if (of_device_is_compatible(np, "fsl-usb2-dr")) {
141                 if (of_device_is_compatible(np, "fsl-usb2-dr-v1.6"))
142                         ver = FSL_USB_VER_1_6;
143                 else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.2"))
144                         ver = FSL_USB_VER_2_2;
145                 else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.4"))
146                         ver = FSL_USB_VER_2_4;
147                 else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.5"))
148                         ver = FSL_USB_VER_2_5;
149                 else /* for previous controller versions */
150                         ver = FSL_USB_VER_OLD;
151 
152                 if (ver > FSL_USB_VER_NONE)
153                         return ver;
154         }
155 
156         if (of_device_is_compatible(np, "fsl,mpc5121-usb2-dr"))
157                 return FSL_USB_VER_OLD;
158 
159         if (of_device_is_compatible(np, "fsl-usb2-mph")) {
160                 if (of_device_is_compatible(np, "fsl-usb2-mph-v1.6"))
161                         ver = FSL_USB_VER_1_6;
162                 else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.2"))
163                         ver = FSL_USB_VER_2_2;
164                 else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.4"))
165                         ver = FSL_USB_VER_2_4;
166                 else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.5"))
167                         ver = FSL_USB_VER_2_5;
168                 else /* for previous controller versions */
169                         ver = FSL_USB_VER_OLD;
170         }
171 
172         return ver;
173 }
174 
175 static int fsl_usb2_mph_dr_of_probe(struct platform_device *ofdev)
176 {
177         struct device_node *np = ofdev->dev.of_node;
178         struct platform_device *usb_dev;
179         struct fsl_usb2_platform_data data, *pdata;
180         struct fsl_usb2_dev_data *dev_data;
181         const struct of_device_id *match;
182         const unsigned char *prop;
183         static unsigned int idx;
184         int i;
185 
186         if (!of_device_is_available(np))
187                 return -ENODEV;
188 
189         match = of_match_device(fsl_usb2_mph_dr_of_match, &ofdev->dev);
190         if (!match)
191                 return -ENODEV;
192 
193         pdata = &data;
194         if (match->data)
195                 memcpy(pdata, match->data, sizeof(data));
196         else
197                 memset(pdata, 0, sizeof(data));
198 
199         dev_data = get_dr_mode_data(np);
200 
201         if (of_device_is_compatible(np, "fsl-usb2-mph")) {
202                 if (of_get_property(np, "port0", NULL))
203                         pdata->port_enables |= FSL_USB2_PORT0_ENABLED;
204 
205                 if (of_get_property(np, "port1", NULL))
206                         pdata->port_enables |= FSL_USB2_PORT1_ENABLED;
207 
208                 pdata->operating_mode = FSL_USB2_MPH_HOST;
209         } else {
210                 if (of_get_property(np, "fsl,invert-drvvbus", NULL))
211                         pdata->invert_drvvbus = 1;
212 
213                 if (of_get_property(np, "fsl,invert-pwr-fault", NULL))
214                         pdata->invert_pwr_fault = 1;
215 
216                 /* setup mode selected in the device tree */
217                 pdata->operating_mode = dev_data->op_mode;
218         }
219 
220         prop = of_get_property(np, "phy_type", NULL);
221         pdata->phy_mode = determine_usb_phy(prop);
222         pdata->controller_ver = usb_get_ver_info(np);
223 
224         /* Activate Erratum by reading property in device tree */
225         if (of_get_property(np, "fsl,usb-erratum-a007792", NULL))
226                 pdata->has_fsl_erratum_a007792 = 1;
227         else
228                 pdata->has_fsl_erratum_a007792 = 0;
229         if (of_get_property(np, "fsl,usb-erratum-a005275", NULL))
230                 pdata->has_fsl_erratum_a005275 = 1;
231         else
232                 pdata->has_fsl_erratum_a005275 = 0;
233 
234         /*
235          * Determine whether phy_clk_valid needs to be checked
236          * by reading property in device tree
237          */
238         if (of_get_property(np, "phy-clk-valid", NULL))
239                 pdata->check_phy_clk_valid = 1;
240         else
241                 pdata->check_phy_clk_valid = 0;
242 
243         if (pdata->have_sysif_regs) {
244                 if (pdata->controller_ver == FSL_USB_VER_NONE) {
245                         dev_warn(&ofdev->dev, "Could not get controller version\n");
246                         return -ENODEV;
247                 }
248         }
249 
250         for (i = 0; i < ARRAY_SIZE(dev_data->drivers); i++) {
251                 if (!dev_data->drivers[i])
252                         continue;
253                 usb_dev = fsl_usb2_device_register(ofdev, pdata,
254                                         dev_data->drivers[i], idx);
255                 if (IS_ERR(usb_dev)) {
256                         dev_err(&ofdev->dev, "Can't register usb device\n");
257                         return PTR_ERR(usb_dev);
258                 }
259         }
260         idx++;
261         return 0;
262 }
263 
264 static int __unregister_subdev(struct device *dev, void *d)
265 {
266         platform_device_unregister(to_platform_device(dev));
267         return 0;
268 }
269 
270 static int fsl_usb2_mph_dr_of_remove(struct platform_device *ofdev)
271 {
272         device_for_each_child(&ofdev->dev, NULL, __unregister_subdev);
273         return 0;
274 }
275 
276 #ifdef CONFIG_PPC_MPC512x
277 
278 #define USBGENCTRL              0x200           /* NOTE: big endian */
279 #define GC_WU_INT_CLR           (1 << 5)        /* Wakeup int clear */
280 #define GC_ULPI_SEL             (1 << 4)        /* ULPI i/f select (usb0 only)*/
281 #define GC_PPP                  (1 << 3)        /* Inv. Port Power Polarity */
282 #define GC_PFP                  (1 << 2)        /* Inv. Power Fault Polarity */
283 #define GC_WU_ULPI_EN           (1 << 1)        /* Wakeup on ULPI event */
284 #define GC_WU_IE                (1 << 1)        /* Wakeup interrupt enable */
285 
286 #define ISIPHYCTRL              0x204           /* NOTE: big endian */
287 #define PHYCTRL_PHYE            (1 << 4)        /* On-chip UTMI PHY enable */
288 #define PHYCTRL_BSENH           (1 << 3)        /* Bit Stuff Enable High */
289 #define PHYCTRL_BSEN            (1 << 2)        /* Bit Stuff Enable */
290 #define PHYCTRL_LSFE            (1 << 1)        /* Line State Filter Enable */
291 #define PHYCTRL_PXE             (1 << 0)        /* PHY oscillator enable */
292 
293 int fsl_usb2_mpc5121_init(struct platform_device *pdev)
294 {
295         struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
296         struct clk *clk;
297         int err;
298 
299         clk = devm_clk_get(pdev->dev.parent, "ipg");
300         if (IS_ERR(clk)) {
301                 dev_err(&pdev->dev, "failed to get clk\n");
302                 return PTR_ERR(clk);
303         }
304         err = clk_prepare_enable(clk);
305         if (err) {
306                 dev_err(&pdev->dev, "failed to enable clk\n");
307                 return err;
308         }
309         pdata->clk = clk;
310 
311         if (pdata->phy_mode == FSL_USB2_PHY_UTMI_WIDE) {
312                 u32 reg = 0;
313 
314                 if (pdata->invert_drvvbus)
315                         reg |= GC_PPP;
316 
317                 if (pdata->invert_pwr_fault)
318                         reg |= GC_PFP;
319 
320                 out_be32(pdata->regs + ISIPHYCTRL, PHYCTRL_PHYE | PHYCTRL_PXE);
321                 out_be32(pdata->regs + USBGENCTRL, reg);
322         }
323         return 0;
324 }
325 
326 static void fsl_usb2_mpc5121_exit(struct platform_device *pdev)
327 {
328         struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
329 
330         pdata->regs = NULL;
331 
332         if (pdata->clk)
333                 clk_disable_unprepare(pdata->clk);
334 }
335 
336 static struct fsl_usb2_platform_data fsl_usb2_mpc5121_pd = {
337         .big_endian_desc = 1,
338         .big_endian_mmio = 1,
339         .es = 1,
340         .have_sysif_regs = 0,
341         .le_setup_buf = 1,
342         .init = fsl_usb2_mpc5121_init,
343         .exit = fsl_usb2_mpc5121_exit,
344 };
345 #endif /* CONFIG_PPC_MPC512x */
346 
347 static struct fsl_usb2_platform_data fsl_usb2_mpc8xxx_pd = {
348         .have_sysif_regs = 1,
349 };
350 
351 static const struct of_device_id fsl_usb2_mph_dr_of_match[] = {
352         { .compatible = "fsl-usb2-mph", .data = &fsl_usb2_mpc8xxx_pd, },
353         { .compatible = "fsl-usb2-dr", .data = &fsl_usb2_mpc8xxx_pd, },
354 #ifdef CONFIG_PPC_MPC512x
355         { .compatible = "fsl,mpc5121-usb2-dr", .data = &fsl_usb2_mpc5121_pd, },
356 #endif
357         {},
358 };
359 MODULE_DEVICE_TABLE(of, fsl_usb2_mph_dr_of_match);
360 
361 static struct platform_driver fsl_usb2_mph_dr_driver = {
362         .driver = {
363                 .name = "fsl-usb2-mph-dr",
364                 .of_match_table = fsl_usb2_mph_dr_of_match,
365         },
366         .probe  = fsl_usb2_mph_dr_of_probe,
367         .remove = fsl_usb2_mph_dr_of_remove,
368 };
369 
370 module_platform_driver(fsl_usb2_mph_dr_driver);
371 
372 MODULE_DESCRIPTION("FSL MPH DR OF devices driver");
373 MODULE_AUTHOR("Anatolij Gustschin <agust@denx.de>");
374 MODULE_LICENSE("GPL");
375 

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