fsl-mph-dr-of.c 9.8 KB

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  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. #include <linux/kernel.h>
  8. #include <linux/platform_device.h>
  9. #include <linux/fsl_devices.h>
  10. #include <linux/err.h>
  11. #include <linux/io.h>
  12. #include <linux/of_platform.h>
  13. #include <linux/clk.h>
  14. #include <linux/module.h>
  15. #include <linux/dma-mapping.h>
  16. struct fsl_usb2_dev_data {
  17. char *dr_mode; /* controller mode */
  18. char *drivers[3]; /* drivers to instantiate for this mode */
  19. enum fsl_usb2_operating_modes op_mode; /* operating mode */
  20. };
  21. static struct fsl_usb2_dev_data dr_mode_data[] = {
  22. {
  23. .dr_mode = "host",
  24. .drivers = { "fsl-ehci", NULL, NULL, },
  25. .op_mode = FSL_USB2_DR_HOST,
  26. },
  27. {
  28. .dr_mode = "otg",
  29. .drivers = { "fsl-usb2-otg", "fsl-ehci", "fsl-usb2-udc", },
  30. .op_mode = FSL_USB2_DR_OTG,
  31. },
  32. {
  33. .dr_mode = "peripheral",
  34. .drivers = { "fsl-usb2-udc", NULL, NULL, },
  35. .op_mode = FSL_USB2_DR_DEVICE,
  36. },
  37. };
  38. static struct fsl_usb2_dev_data *get_dr_mode_data(struct device_node *np)
  39. {
  40. const unsigned char *prop;
  41. int i;
  42. prop = of_get_property(np, "dr_mode", NULL);
  43. if (prop) {
  44. for (i = 0; i < ARRAY_SIZE(dr_mode_data); i++) {
  45. if (!strcmp(prop, dr_mode_data[i].dr_mode))
  46. return &dr_mode_data[i];
  47. }
  48. }
  49. pr_warn("%pOF: Invalid 'dr_mode' property, fallback to host mode\n",
  50. np);
  51. return &dr_mode_data[0]; /* mode not specified, use host */
  52. }
  53. static enum fsl_usb2_phy_modes determine_usb_phy(const char *phy_type)
  54. {
  55. if (!phy_type)
  56. return FSL_USB2_PHY_NONE;
  57. if (!strcasecmp(phy_type, "ulpi"))
  58. return FSL_USB2_PHY_ULPI;
  59. if (!strcasecmp(phy_type, "utmi"))
  60. return FSL_USB2_PHY_UTMI;
  61. if (!strcasecmp(phy_type, "utmi_wide"))
  62. return FSL_USB2_PHY_UTMI_WIDE;
  63. if (!strcasecmp(phy_type, "utmi_dual"))
  64. return FSL_USB2_PHY_UTMI_DUAL;
  65. if (!strcasecmp(phy_type, "serial"))
  66. return FSL_USB2_PHY_SERIAL;
  67. return FSL_USB2_PHY_NONE;
  68. }
  69. static struct platform_device *fsl_usb2_device_register(
  70. struct platform_device *ofdev,
  71. struct fsl_usb2_platform_data *pdata,
  72. const char *name, int id)
  73. {
  74. struct platform_device *pdev;
  75. const struct resource *res = ofdev->resource;
  76. unsigned int num = ofdev->num_resources;
  77. int retval;
  78. pdev = platform_device_alloc(name, id);
  79. if (!pdev) {
  80. retval = -ENOMEM;
  81. goto error;
  82. }
  83. pdev->dev.parent = &ofdev->dev;
  84. pdev->dev.coherent_dma_mask = ofdev->dev.coherent_dma_mask;
  85. if (!pdev->dev.dma_mask) {
  86. pdev->dev.dma_mask = &ofdev->dev.coherent_dma_mask;
  87. } else {
  88. retval = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
  89. if (retval)
  90. goto error;
  91. }
  92. retval = platform_device_add_data(pdev, pdata, sizeof(*pdata));
  93. if (retval)
  94. goto error;
  95. if (num) {
  96. retval = platform_device_add_resources(pdev, res, num);
  97. if (retval)
  98. goto error;
  99. }
  100. retval = platform_device_add(pdev);
  101. if (retval)
  102. goto error;
  103. return pdev;
  104. error:
  105. platform_device_put(pdev);
  106. return ERR_PTR(retval);
  107. }
  108. static const struct of_device_id fsl_usb2_mph_dr_of_match[];
  109. static enum fsl_usb2_controller_ver usb_get_ver_info(struct device_node *np)
  110. {
  111. enum fsl_usb2_controller_ver ver = FSL_USB_VER_NONE;
  112. /*
  113. * returns 1 for usb controller version 1.6
  114. * returns 2 for usb controller version 2.2
  115. * returns 3 for usb controller version 2.4
  116. * returns 4 for usb controller version 2.5
  117. * returns 0 otherwise
  118. */
  119. if (of_device_is_compatible(np, "fsl-usb2-dr")) {
  120. if (of_device_is_compatible(np, "fsl-usb2-dr-v1.6"))
  121. ver = FSL_USB_VER_1_6;
  122. else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.2"))
  123. ver = FSL_USB_VER_2_2;
  124. else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.4"))
  125. ver = FSL_USB_VER_2_4;
  126. else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.5"))
  127. ver = FSL_USB_VER_2_5;
  128. else /* for previous controller versions */
  129. ver = FSL_USB_VER_OLD;
  130. if (ver > FSL_USB_VER_NONE)
  131. return ver;
  132. }
  133. if (of_device_is_compatible(np, "fsl,mpc5121-usb2-dr"))
  134. return FSL_USB_VER_OLD;
  135. if (of_device_is_compatible(np, "fsl-usb2-mph")) {
  136. if (of_device_is_compatible(np, "fsl-usb2-mph-v1.6"))
  137. ver = FSL_USB_VER_1_6;
  138. else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.2"))
  139. ver = FSL_USB_VER_2_2;
  140. else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.4"))
  141. ver = FSL_USB_VER_2_4;
  142. else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.5"))
  143. ver = FSL_USB_VER_2_5;
  144. else /* for previous controller versions */
  145. ver = FSL_USB_VER_OLD;
  146. }
  147. return ver;
  148. }
  149. static int fsl_usb2_mph_dr_of_probe(struct platform_device *ofdev)
  150. {
  151. struct device_node *np = ofdev->dev.of_node;
  152. struct platform_device *usb_dev;
  153. struct fsl_usb2_platform_data data, *pdata;
  154. struct fsl_usb2_dev_data *dev_data;
  155. const struct of_device_id *match;
  156. const unsigned char *prop;
  157. static unsigned int idx;
  158. int i;
  159. if (!of_device_is_available(np))
  160. return -ENODEV;
  161. match = of_match_device(fsl_usb2_mph_dr_of_match, &ofdev->dev);
  162. if (!match)
  163. return -ENODEV;
  164. pdata = &data;
  165. if (match->data)
  166. memcpy(pdata, match->data, sizeof(data));
  167. else
  168. memset(pdata, 0, sizeof(data));
  169. dev_data = get_dr_mode_data(np);
  170. if (of_device_is_compatible(np, "fsl-usb2-mph")) {
  171. if (of_get_property(np, "port0", NULL))
  172. pdata->port_enables |= FSL_USB2_PORT0_ENABLED;
  173. if (of_get_property(np, "port1", NULL))
  174. pdata->port_enables |= FSL_USB2_PORT1_ENABLED;
  175. pdata->operating_mode = FSL_USB2_MPH_HOST;
  176. } else {
  177. if (of_get_property(np, "fsl,invert-drvvbus", NULL))
  178. pdata->invert_drvvbus = 1;
  179. if (of_get_property(np, "fsl,invert-pwr-fault", NULL))
  180. pdata->invert_pwr_fault = 1;
  181. /* setup mode selected in the device tree */
  182. pdata->operating_mode = dev_data->op_mode;
  183. }
  184. prop = of_get_property(np, "phy_type", NULL);
  185. pdata->phy_mode = determine_usb_phy(prop);
  186. pdata->controller_ver = usb_get_ver_info(np);
  187. /* Activate Erratum by reading property in device tree */
  188. pdata->has_fsl_erratum_a007792 =
  189. of_property_read_bool(np, "fsl,usb-erratum-a007792");
  190. pdata->has_fsl_erratum_a005275 =
  191. of_property_read_bool(np, "fsl,usb-erratum-a005275");
  192. pdata->has_fsl_erratum_a005697 =
  193. of_property_read_bool(np, "fsl,usb_erratum-a005697");
  194. pdata->has_fsl_erratum_a006918 =
  195. of_property_read_bool(np, "fsl,usb_erratum-a006918");
  196. pdata->has_fsl_erratum_14 =
  197. of_property_read_bool(np, "fsl,usb_erratum-14");
  198. /*
  199. * Determine whether phy_clk_valid needs to be checked
  200. * by reading property in device tree
  201. */
  202. pdata->check_phy_clk_valid =
  203. of_property_read_bool(np, "phy-clk-valid");
  204. if (pdata->have_sysif_regs) {
  205. if (pdata->controller_ver == FSL_USB_VER_NONE) {
  206. dev_warn(&ofdev->dev, "Could not get controller version\n");
  207. return -ENODEV;
  208. }
  209. }
  210. for (i = 0; i < ARRAY_SIZE(dev_data->drivers); i++) {
  211. if (!dev_data->drivers[i])
  212. continue;
  213. usb_dev = fsl_usb2_device_register(ofdev, pdata,
  214. dev_data->drivers[i], idx);
  215. if (IS_ERR(usb_dev)) {
  216. dev_err(&ofdev->dev, "Can't register usb device\n");
  217. return PTR_ERR(usb_dev);
  218. }
  219. }
  220. idx++;
  221. return 0;
  222. }
  223. static int __unregister_subdev(struct device *dev, void *d)
  224. {
  225. platform_device_unregister(to_platform_device(dev));
  226. return 0;
  227. }
  228. static int fsl_usb2_mph_dr_of_remove(struct platform_device *ofdev)
  229. {
  230. device_for_each_child(&ofdev->dev, NULL, __unregister_subdev);
  231. return 0;
  232. }
  233. #ifdef CONFIG_PPC_MPC512x
  234. #define USBGENCTRL 0x200 /* NOTE: big endian */
  235. #define GC_WU_INT_CLR (1 << 5) /* Wakeup int clear */
  236. #define GC_ULPI_SEL (1 << 4) /* ULPI i/f select (usb0 only)*/
  237. #define GC_PPP (1 << 3) /* Inv. Port Power Polarity */
  238. #define GC_PFP (1 << 2) /* Inv. Power Fault Polarity */
  239. #define GC_WU_ULPI_EN (1 << 1) /* Wakeup on ULPI event */
  240. #define GC_WU_IE (1 << 1) /* Wakeup interrupt enable */
  241. #define ISIPHYCTRL 0x204 /* NOTE: big endian */
  242. #define PHYCTRL_PHYE (1 << 4) /* On-chip UTMI PHY enable */
  243. #define PHYCTRL_BSENH (1 << 3) /* Bit Stuff Enable High */
  244. #define PHYCTRL_BSEN (1 << 2) /* Bit Stuff Enable */
  245. #define PHYCTRL_LSFE (1 << 1) /* Line State Filter Enable */
  246. #define PHYCTRL_PXE (1 << 0) /* PHY oscillator enable */
  247. int fsl_usb2_mpc5121_init(struct platform_device *pdev)
  248. {
  249. struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
  250. struct clk *clk;
  251. int err;
  252. clk = devm_clk_get(pdev->dev.parent, "ipg");
  253. if (IS_ERR(clk)) {
  254. dev_err(&pdev->dev, "failed to get clk\n");
  255. return PTR_ERR(clk);
  256. }
  257. err = clk_prepare_enable(clk);
  258. if (err) {
  259. dev_err(&pdev->dev, "failed to enable clk\n");
  260. return err;
  261. }
  262. pdata->clk = clk;
  263. if (pdata->phy_mode == FSL_USB2_PHY_UTMI_WIDE) {
  264. u32 reg = 0;
  265. if (pdata->invert_drvvbus)
  266. reg |= GC_PPP;
  267. if (pdata->invert_pwr_fault)
  268. reg |= GC_PFP;
  269. out_be32(pdata->regs + ISIPHYCTRL, PHYCTRL_PHYE | PHYCTRL_PXE);
  270. out_be32(pdata->regs + USBGENCTRL, reg);
  271. }
  272. return 0;
  273. }
  274. static void fsl_usb2_mpc5121_exit(struct platform_device *pdev)
  275. {
  276. struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
  277. pdata->regs = NULL;
  278. if (pdata->clk)
  279. clk_disable_unprepare(pdata->clk);
  280. }
  281. static struct fsl_usb2_platform_data fsl_usb2_mpc5121_pd = {
  282. .big_endian_desc = 1,
  283. .big_endian_mmio = 1,
  284. .es = 1,
  285. .have_sysif_regs = 0,
  286. .le_setup_buf = 1,
  287. .init = fsl_usb2_mpc5121_init,
  288. .exit = fsl_usb2_mpc5121_exit,
  289. };
  290. #endif /* CONFIG_PPC_MPC512x */
  291. static struct fsl_usb2_platform_data fsl_usb2_mpc8xxx_pd = {
  292. .have_sysif_regs = 1,
  293. };
  294. static const struct of_device_id fsl_usb2_mph_dr_of_match[] = {
  295. { .compatible = "fsl-usb2-mph", .data = &fsl_usb2_mpc8xxx_pd, },
  296. { .compatible = "fsl-usb2-dr", .data = &fsl_usb2_mpc8xxx_pd, },
  297. #ifdef CONFIG_PPC_MPC512x
  298. { .compatible = "fsl,mpc5121-usb2-dr", .data = &fsl_usb2_mpc5121_pd, },
  299. #endif
  300. {},
  301. };
  302. MODULE_DEVICE_TABLE(of, fsl_usb2_mph_dr_of_match);
  303. static struct platform_driver fsl_usb2_mph_dr_driver = {
  304. .driver = {
  305. .name = "fsl-usb2-mph-dr",
  306. .of_match_table = fsl_usb2_mph_dr_of_match,
  307. },
  308. .probe = fsl_usb2_mph_dr_of_probe,
  309. .remove = fsl_usb2_mph_dr_of_remove,
  310. };
  311. module_platform_driver(fsl_usb2_mph_dr_driver);
  312. MODULE_DESCRIPTION("FSL MPH DR OF devices driver");
  313. MODULE_AUTHOR("Anatolij Gustschin <agust@denx.de>");
  314. MODULE_LICENSE("GPL");