1 /* 2 * Copyright 2012 Freescale Semiconductor, Inc. 3 * 4 * The code contained herein is licensed under the GNU General Public 5 * License. You may obtain a copy of the GNU General Public License 6 * Version 2 or later at the following locations: 7 * 8 * http://www.opensource.org/licenses/gpl-license.html 9 * http://www.gnu.org/copyleft/gpl.html 10 */ 11 12 #include <linux/module.h> 13 #include <linux/of_platform.h> 14 #include <linux/err.h> 15 #include <linux/io.h> 16 #include <linux/delay.h> 17 18 #include "ci_hdrc_imx.h" 19 20 #define MX25_USB_PHY_CTRL_OFFSET 0x08 21 #define MX25_BM_EXTERNAL_VBUS_DIVIDER BIT(23) 22 23 #define MX25_EHCI_INTERFACE_SINGLE_UNI (2 << 0) 24 #define MX25_EHCI_INTERFACE_DIFF_UNI (0 << 0) 25 #define MX25_EHCI_INTERFACE_MASK (0xf) 26 27 #define MX25_OTG_SIC_SHIFT 29 28 #define MX25_OTG_SIC_MASK (0x3 << MX25_OTG_SIC_SHIFT) 29 #define MX25_OTG_PM_BIT BIT(24) 30 #define MX25_OTG_PP_BIT BIT(11) 31 #define MX25_OTG_OCPOL_BIT BIT(3) 32 33 #define MX25_H1_SIC_SHIFT 21 34 #define MX25_H1_SIC_MASK (0x3 << MX25_H1_SIC_SHIFT) 35 #define MX25_H1_PP_BIT BIT(18) 36 #define MX25_H1_PM_BIT BIT(16) 37 #define MX25_H1_IPPUE_UP_BIT BIT(7) 38 #define MX25_H1_IPPUE_DOWN_BIT BIT(6) 39 #define MX25_H1_TLL_BIT BIT(5) 40 #define MX25_H1_USBTE_BIT BIT(4) 41 #define MX25_H1_OCPOL_BIT BIT(2) 42 43 #define MX27_H1_PM_BIT BIT(8) 44 #define MX27_H2_PM_BIT BIT(16) 45 #define MX27_OTG_PM_BIT BIT(24) 46 47 #define MX53_USB_OTG_PHY_CTRL_0_OFFSET 0x08 48 #define MX53_USB_OTG_PHY_CTRL_1_OFFSET 0x0c 49 #define MX53_USB_UH2_CTRL_OFFSET 0x14 50 #define MX53_USB_UH3_CTRL_OFFSET 0x18 51 #define MX53_BM_OVER_CUR_DIS_H1 BIT(5) 52 #define MX53_BM_OVER_CUR_DIS_OTG BIT(8) 53 #define MX53_BM_OVER_CUR_DIS_UHx BIT(30) 54 #define MX53_USB_PHYCTRL1_PLLDIV_MASK 0x3 55 #define MX53_USB_PLL_DIV_24_MHZ 0x01 56 57 #define MX6_BM_OVER_CUR_DIS BIT(7) 58 #define MX6_BM_WAKEUP_ENABLE BIT(10) 59 #define MX6_BM_ID_WAKEUP BIT(16) 60 #define MX6_BM_VBUS_WAKEUP BIT(17) 61 #define MX6SX_BM_DPDM_WAKEUP_EN BIT(29) 62 #define MX6_BM_WAKEUP_INTR BIT(31) 63 #define MX6_USB_OTG1_PHY_CTRL 0x18 64 /* For imx6dql, it is host-only controller, for later imx6, it is otg's */ 65 #define MX6_USB_OTG2_PHY_CTRL 0x1c 66 #define MX6SX_USB_VBUS_WAKEUP_SOURCE(v) (v << 8) 67 #define MX6SX_USB_VBUS_WAKEUP_SOURCE_VBUS MX6SX_USB_VBUS_WAKEUP_SOURCE(0) 68 #define MX6SX_USB_VBUS_WAKEUP_SOURCE_AVALID MX6SX_USB_VBUS_WAKEUP_SOURCE(1) 69 #define MX6SX_USB_VBUS_WAKEUP_SOURCE_BVALID MX6SX_USB_VBUS_WAKEUP_SOURCE(2) 70 #define MX6SX_USB_VBUS_WAKEUP_SOURCE_SESS_END MX6SX_USB_VBUS_WAKEUP_SOURCE(3) 71 72 #define VF610_OVER_CUR_DIS BIT(7) 73 74 struct usbmisc_ops { 75 /* It's called once when probe a usb device */ 76 int (*init)(struct imx_usbmisc_data *data); 77 /* It's called once after adding a usb device */ 78 int (*post)(struct imx_usbmisc_data *data); 79 /* It's called when we need to enable/disable usb wakeup */ 80 int (*set_wakeup)(struct imx_usbmisc_data *data, bool enabled); 81 }; 82 83 struct imx_usbmisc { 84 void __iomem *base; 85 spinlock_t lock; 86 const struct usbmisc_ops *ops; 87 }; 88 89 static int usbmisc_imx25_init(struct imx_usbmisc_data *data) 90 { 91 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev); 92 unsigned long flags; 93 u32 val = 0; 94 95 if (data->index > 1) 96 return -EINVAL; 97 98 spin_lock_irqsave(&usbmisc->lock, flags); 99 switch (data->index) { 100 case 0: 101 val = readl(usbmisc->base); 102 val &= ~(MX25_OTG_SIC_MASK | MX25_OTG_PP_BIT); 103 val |= (MX25_EHCI_INTERFACE_DIFF_UNI & MX25_EHCI_INTERFACE_MASK) << MX25_OTG_SIC_SHIFT; 104 val |= (MX25_OTG_PM_BIT | MX25_OTG_OCPOL_BIT); 105 writel(val, usbmisc->base); 106 break; 107 case 1: 108 val = readl(usbmisc->base); 109 val &= ~(MX25_H1_SIC_MASK | MX25_H1_PP_BIT | MX25_H1_IPPUE_UP_BIT); 110 val |= (MX25_EHCI_INTERFACE_SINGLE_UNI & MX25_EHCI_INTERFACE_MASK) << MX25_H1_SIC_SHIFT; 111 val |= (MX25_H1_PM_BIT | MX25_H1_OCPOL_BIT | MX25_H1_TLL_BIT | 112 MX25_H1_USBTE_BIT | MX25_H1_IPPUE_DOWN_BIT); 113 114 writel(val, usbmisc->base); 115 116 break; 117 } 118 spin_unlock_irqrestore(&usbmisc->lock, flags); 119 120 return 0; 121 } 122 123 static int usbmisc_imx25_post(struct imx_usbmisc_data *data) 124 { 125 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev); 126 void __iomem *reg; 127 unsigned long flags; 128 u32 val; 129 130 if (data->index > 2) 131 return -EINVAL; 132 133 if (data->evdo) { 134 spin_lock_irqsave(&usbmisc->lock, flags); 135 reg = usbmisc->base + MX25_USB_PHY_CTRL_OFFSET; 136 val = readl(reg); 137 writel(val | MX25_BM_EXTERNAL_VBUS_DIVIDER, reg); 138 spin_unlock_irqrestore(&usbmisc->lock, flags); 139 usleep_range(5000, 10000); /* needed to stabilize voltage */ 140 } 141 142 return 0; 143 } 144 145 static int usbmisc_imx27_init(struct imx_usbmisc_data *data) 146 { 147 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev); 148 unsigned long flags; 149 u32 val; 150 151 switch (data->index) { 152 case 0: 153 val = MX27_OTG_PM_BIT; 154 break; 155 case 1: 156 val = MX27_H1_PM_BIT; 157 break; 158 case 2: 159 val = MX27_H2_PM_BIT; 160 break; 161 default: 162 return -EINVAL; 163 }; 164 165 spin_lock_irqsave(&usbmisc->lock, flags); 166 if (data->disable_oc) 167 val = readl(usbmisc->base) | val; 168 else 169 val = readl(usbmisc->base) & ~val; 170 writel(val, usbmisc->base); 171 spin_unlock_irqrestore(&usbmisc->lock, flags); 172 173 return 0; 174 } 175 176 static int usbmisc_imx53_init(struct imx_usbmisc_data *data) 177 { 178 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev); 179 void __iomem *reg = NULL; 180 unsigned long flags; 181 u32 val = 0; 182 183 if (data->index > 3) 184 return -EINVAL; 185 186 /* Select a 24 MHz reference clock for the PHY */ 187 val = readl(usbmisc->base + MX53_USB_OTG_PHY_CTRL_1_OFFSET); 188 val &= ~MX53_USB_PHYCTRL1_PLLDIV_MASK; 189 val |= MX53_USB_PLL_DIV_24_MHZ; 190 writel(val, usbmisc->base + MX53_USB_OTG_PHY_CTRL_1_OFFSET); 191 192 if (data->disable_oc) { 193 spin_lock_irqsave(&usbmisc->lock, flags); 194 switch (data->index) { 195 case 0: 196 reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_0_OFFSET; 197 val = readl(reg) | MX53_BM_OVER_CUR_DIS_OTG; 198 break; 199 case 1: 200 reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_0_OFFSET; 201 val = readl(reg) | MX53_BM_OVER_CUR_DIS_H1; 202 break; 203 case 2: 204 reg = usbmisc->base + MX53_USB_UH2_CTRL_OFFSET; 205 val = readl(reg) | MX53_BM_OVER_CUR_DIS_UHx; 206 break; 207 case 3: 208 reg = usbmisc->base + MX53_USB_UH3_CTRL_OFFSET; 209 val = readl(reg) | MX53_BM_OVER_CUR_DIS_UHx; 210 break; 211 } 212 if (reg && val) 213 writel(val, reg); 214 spin_unlock_irqrestore(&usbmisc->lock, flags); 215 } 216 217 return 0; 218 } 219 220 static int usbmisc_imx6q_set_wakeup 221 (struct imx_usbmisc_data *data, bool enabled) 222 { 223 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev); 224 unsigned long flags; 225 u32 val; 226 u32 wakeup_setting = (MX6_BM_WAKEUP_ENABLE | 227 MX6_BM_VBUS_WAKEUP | MX6_BM_ID_WAKEUP); 228 int ret = 0; 229 230 if (data->index > 3) 231 return -EINVAL; 232 233 spin_lock_irqsave(&usbmisc->lock, flags); 234 val = readl(usbmisc->base + data->index * 4); 235 if (enabled) { 236 val |= wakeup_setting; 237 writel(val, usbmisc->base + data->index * 4); 238 } else { 239 if (val & MX6_BM_WAKEUP_INTR) 240 pr_debug("wakeup int at ci_hdrc.%d\n", data->index); 241 val &= ~wakeup_setting; 242 writel(val, usbmisc->base + data->index * 4); 243 } 244 spin_unlock_irqrestore(&usbmisc->lock, flags); 245 246 return ret; 247 } 248 249 static int usbmisc_imx6q_init(struct imx_usbmisc_data *data) 250 { 251 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev); 252 unsigned long flags; 253 u32 reg; 254 255 if (data->index > 3) 256 return -EINVAL; 257 258 if (data->disable_oc) { 259 spin_lock_irqsave(&usbmisc->lock, flags); 260 reg = readl(usbmisc->base + data->index * 4); 261 writel(reg | MX6_BM_OVER_CUR_DIS, 262 usbmisc->base + data->index * 4); 263 spin_unlock_irqrestore(&usbmisc->lock, flags); 264 } 265 266 usbmisc_imx6q_set_wakeup(data, false); 267 268 return 0; 269 } 270 271 static int usbmisc_imx6sx_init(struct imx_usbmisc_data *data) 272 { 273 void __iomem *reg = NULL; 274 unsigned long flags; 275 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev); 276 u32 val; 277 278 usbmisc_imx6q_init(data); 279 280 if (data->index == 0 || data->index == 1) { 281 reg = usbmisc->base + MX6_USB_OTG1_PHY_CTRL + data->index * 4; 282 spin_lock_irqsave(&usbmisc->lock, flags); 283 /* Set vbus wakeup source as bvalid */ 284 val = readl(reg); 285 writel(val | MX6SX_USB_VBUS_WAKEUP_SOURCE_BVALID, reg); 286 /* 287 * Disable dp/dm wakeup in device mode when vbus is 288 * not there. 289 */ 290 val = readl(usbmisc->base + data->index * 4); 291 writel(val & ~MX6SX_BM_DPDM_WAKEUP_EN, 292 usbmisc->base + data->index * 4); 293 spin_unlock_irqrestore(&usbmisc->lock, flags); 294 } 295 296 return 0; 297 } 298 299 static int usbmisc_vf610_init(struct imx_usbmisc_data *data) 300 { 301 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev); 302 u32 reg; 303 304 /* 305 * Vybrid only has one misc register set, but in two different 306 * areas. These is reflected in two instances of this driver. 307 */ 308 if (data->index >= 1) 309 return -EINVAL; 310 311 if (data->disable_oc) { 312 reg = readl(usbmisc->base); 313 writel(reg | VF610_OVER_CUR_DIS, usbmisc->base); 314 } 315 316 return 0; 317 } 318 319 static const struct usbmisc_ops imx25_usbmisc_ops = { 320 .init = usbmisc_imx25_init, 321 .post = usbmisc_imx25_post, 322 }; 323 324 static const struct usbmisc_ops imx27_usbmisc_ops = { 325 .init = usbmisc_imx27_init, 326 }; 327 328 static const struct usbmisc_ops imx53_usbmisc_ops = { 329 .init = usbmisc_imx53_init, 330 }; 331 332 static const struct usbmisc_ops imx6q_usbmisc_ops = { 333 .set_wakeup = usbmisc_imx6q_set_wakeup, 334 .init = usbmisc_imx6q_init, 335 }; 336 337 static const struct usbmisc_ops vf610_usbmisc_ops = { 338 .init = usbmisc_vf610_init, 339 }; 340 341 static const struct usbmisc_ops imx6sx_usbmisc_ops = { 342 .set_wakeup = usbmisc_imx6q_set_wakeup, 343 .init = usbmisc_imx6sx_init, 344 }; 345 346 int imx_usbmisc_init(struct imx_usbmisc_data *data) 347 { 348 struct imx_usbmisc *usbmisc; 349 350 if (!data) 351 return 0; 352 353 usbmisc = dev_get_drvdata(data->dev); 354 if (!usbmisc->ops->init) 355 return 0; 356 return usbmisc->ops->init(data); 357 } 358 EXPORT_SYMBOL_GPL(imx_usbmisc_init); 359 360 int imx_usbmisc_init_post(struct imx_usbmisc_data *data) 361 { 362 struct imx_usbmisc *usbmisc; 363 364 if (!data) 365 return 0; 366 367 usbmisc = dev_get_drvdata(data->dev); 368 if (!usbmisc->ops->post) 369 return 0; 370 return usbmisc->ops->post(data); 371 } 372 EXPORT_SYMBOL_GPL(imx_usbmisc_init_post); 373 374 int imx_usbmisc_set_wakeup(struct imx_usbmisc_data *data, bool enabled) 375 { 376 struct imx_usbmisc *usbmisc; 377 378 if (!data) 379 return 0; 380 381 usbmisc = dev_get_drvdata(data->dev); 382 if (!usbmisc->ops->set_wakeup) 383 return 0; 384 return usbmisc->ops->set_wakeup(data, enabled); 385 } 386 EXPORT_SYMBOL_GPL(imx_usbmisc_set_wakeup); 387 388 static const struct of_device_id usbmisc_imx_dt_ids[] = { 389 { 390 .compatible = "fsl,imx25-usbmisc", 391 .data = &imx25_usbmisc_ops, 392 }, 393 { 394 .compatible = "fsl,imx35-usbmisc", 395 .data = &imx25_usbmisc_ops, 396 }, 397 { 398 .compatible = "fsl,imx27-usbmisc", 399 .data = &imx27_usbmisc_ops, 400 }, 401 { 402 .compatible = "fsl,imx51-usbmisc", 403 .data = &imx53_usbmisc_ops, 404 }, 405 { 406 .compatible = "fsl,imx53-usbmisc", 407 .data = &imx53_usbmisc_ops, 408 }, 409 { 410 .compatible = "fsl,imx6q-usbmisc", 411 .data = &imx6q_usbmisc_ops, 412 }, 413 { 414 .compatible = "fsl,vf610-usbmisc", 415 .data = &vf610_usbmisc_ops, 416 }, 417 { 418 .compatible = "fsl,imx6sx-usbmisc", 419 .data = &imx6sx_usbmisc_ops, 420 }, 421 { /* sentinel */ } 422 }; 423 MODULE_DEVICE_TABLE(of, usbmisc_imx_dt_ids); 424 425 static int usbmisc_imx_probe(struct platform_device *pdev) 426 { 427 struct resource *res; 428 struct imx_usbmisc *data; 429 struct of_device_id *tmp_dev; 430 431 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); 432 if (!data) 433 return -ENOMEM; 434 435 spin_lock_init(&data->lock); 436 437 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 438 data->base = devm_ioremap_resource(&pdev->dev, res); 439 if (IS_ERR(data->base)) 440 return PTR_ERR(data->base); 441 442 tmp_dev = (struct of_device_id *) 443 of_match_device(usbmisc_imx_dt_ids, &pdev->dev); 444 data->ops = (const struct usbmisc_ops *)tmp_dev->data; 445 platform_set_drvdata(pdev, data); 446 447 return 0; 448 } 449 450 static int usbmisc_imx_remove(struct platform_device *pdev) 451 { 452 return 0; 453 } 454 455 static struct platform_driver usbmisc_imx_driver = { 456 .probe = usbmisc_imx_probe, 457 .remove = usbmisc_imx_remove, 458 .driver = { 459 .name = "usbmisc_imx", 460 .of_match_table = usbmisc_imx_dt_ids, 461 }, 462 }; 463 464 module_platform_driver(usbmisc_imx_driver); 465 466 MODULE_ALIAS("platform:usbmisc-imx"); 467 MODULE_LICENSE("GPL v2"); 468 MODULE_DESCRIPTION("driver for imx usb non-core registers"); 469 MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>"); 470