drivers/usb/host/xhci-mtk.c

   1 /*
   2  * MediaTek xHCI Host Controller Driver
   3  *
   4  * Copyright (c) 2015 MediaTek Inc.
   5  * Author:
   6  *  Chunfeng Yun <chunfeng.yun@mediatek.com>
   7  *
   8  * This software is licensed under the terms of the GNU General Public
   9  * License version 2, as published by the Free Software Foundation, and
  10  * may be copied, distributed, and modified under those terms.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  */
  18
  19 #include <linux/clk.h>
  20 #include <linux/dma-mapping.h>
  21 #include <linux/iopoll.h>
  22 #include <linux/kernel.h>
  23 #include <linux/mfd/syscon.h>
  24 #include <linux/module.h>
  25 #include <linux/of.h>
  26 #include <linux/phy/phy.h>
  27 #include <linux/platform_device.h>
  28 #include <linux/pm_runtime.h>
  29 #include <linux/regmap.h>
  30 #include <linux/regulator/consumer.h>
  31
  32 #include "xhci.h"
  33 #include "xhci-mtk.h"
  34
  35 /* ip_pw_ctrl0 register */
  36 #define CTRL0_IP_SW_RST BIT(0)
  37
  38 /* ip_pw_ctrl1 register */
  39 #define CTRL1_IP_HOST_PDN       BIT(0)
  40
  41 /* ip_pw_ctrl2 register */
  42 #define CTRL2_IP_DEV_PDN        BIT(0)
  43
  44 /* ip_pw_sts1 register */
  45 #define STS1_IP_SLEEP_STS       BIT(30)
  46 #define STS1_XHCI_RST           BIT(11)
  47 #define STS1_SYS125_RST BIT(10)
  48 #define STS1_REF_RST            BIT(8)
  49 #define STS1_SYSPLL_STABLE      BIT(0)
  50
  51 /* ip_xhci_cap register */
  52 #define CAP_U3_PORT_NUM(p)      ((p) & 0xff)
  53 #define CAP_U2_PORT_NUM(p)      (((p) >> 8) & 0xff)
  54
  55 /* u3_ctrl_p register */
  56 #define CTRL_U3_PORT_HOST_SEL   BIT(2)
  57 #define CTRL_U3_PORT_PDN        BIT(1)
  58 #define CTRL_U3_PORT_DIS        BIT(0)
  59
  60 /* u2_ctrl_p register */
  61 #define CTRL_U2_PORT_HOST_SEL   BIT(2)
  62 #define CTRL_U2_PORT_PDN        BIT(1)
  63 #define CTRL_U2_PORT_DIS        BIT(0)
  64
  65 /* u2_phy_pll register */
  66 #define CTRL_U2_FORCE_PLL_STB   BIT(28)
  67
  68 #define PERI_WK_CTRL0           0x400
  69 #define UWK_CTR0_0P_LS_PE       BIT(8)  /* posedge */
  70 #define UWK_CTR0_0P_LS_NE       BIT(7)  /* negedge for 0p linestate*/
  71 #define UWK_CTL1_1P_LS_C(x)     (((x) & 0xf) << 1)
  72 #define UWK_CTL1_1P_LS_E        BIT(0)
  73
  74 #define PERI_WK_CTRL1           0x404
  75 #define UWK_CTL1_IS_C(x)        (((x) & 0xf) << 26)
  76 #define UWK_CTL1_IS_E           BIT(25)
  77 #define UWK_CTL1_0P_LS_C(x)     (((x) & 0xf) << 21)
  78 #define UWK_CTL1_0P_LS_E        BIT(20)
  79 #define UWK_CTL1_IDDIG_C(x)     (((x) & 0xf) << 11)  /* cycle debounce */
  80 #define UWK_CTL1_IDDIG_E        BIT(10) /* enable debounce */
  81 #define UWK_CTL1_IDDIG_P        BIT(9)  /* polarity */
  82 #define UWK_CTL1_0P_LS_P        BIT(7)
  83 #define UWK_CTL1_IS_P           BIT(6)  /* polarity for ip sleep */
  84
  85 enum ssusb_wakeup_src {
  86         SSUSB_WK_IP_SLEEP = 1,
  87         SSUSB_WK_LINE_STATE = 2,
  88 };
  89
  90 static int xhci_mtk_host_enable(struct xhci_hcd_mtk *mtk)
  91 {
  92         struct mu3c_ippc_regs __iomem *ippc = mtk->ippc_regs;
  93         u32 value, check_val;
  94         int ret;
  95         int i;
  96
  97         /* power on host ip */
  98         value = readl(&ippc->ip_pw_ctr1);
  99         value &= ~CTRL1_IP_HOST_PDN;
 100         writel(value, &ippc->ip_pw_ctr1);
 101
 102         /* power on and enable all u3 ports */
 103         for (i = 0; i < mtk->num_u3_ports; i++) {
 104                 value = readl(&ippc->u3_ctrl_p[i]);
 105                 value &= ~(CTRL_U3_PORT_PDN | CTRL_U3_PORT_DIS);
 106                 value |= CTRL_U3_PORT_HOST_SEL;
 107                 writel(value, &ippc->u3_ctrl_p[i]);
 108         }
 109
 110         /* power on and enable all u2 ports */
 111         for (i = 0; i < mtk->num_u2_ports; i++) {
 112                 value = readl(&ippc->u2_ctrl_p[i]);
 113                 value &= ~(CTRL_U2_PORT_PDN | CTRL_U2_PORT_DIS);
 114                 value |= CTRL_U2_PORT_HOST_SEL;
 115                 writel(value, &ippc->u2_ctrl_p[i]);
 116         }
 117
 118         /*
 119          * wait for clocks to be stable, and clock domains reset to
 120          * be inactive after power on and enable ports
 121          */
 122         check_val = STS1_SYSPLL_STABLE | STS1_REF_RST |
 123                         STS1_SYS125_RST | STS1_XHCI_RST;
 124
 125         ret = readl_poll_timeout(&ippc->ip_pw_sts1, value,
 126                           (check_val == (value & check_val)), 100, 20000);
 127         if (ret) {
 128                 dev_err(mtk->dev, "clocks are not stable (0x%x)\n", value);
 129                 return ret;
 130         }
 131
 132         return 0;
 133 }
 134
 135 static int xhci_mtk_host_disable(struct xhci_hcd_mtk *mtk)
 136 {
 137         struct mu3c_ippc_regs __iomem *ippc = mtk->ippc_regs;
 138         u32 value;
 139         int ret;
 140         int i;
 141
 142         /* power down all u3 ports */
 143         for (i = 0; i < mtk->num_u3_ports; i++) {
 144                 value = readl(&ippc->u3_ctrl_p[i]);
 145                 value |= CTRL_U3_PORT_PDN;
 146                 writel(value, &ippc->u3_ctrl_p[i]);
 147         }
 148
 149         /* power down all u2 ports */
 150         for (i = 0; i < mtk->num_u2_ports; i++) {
 151                 value = readl(&ippc->u2_ctrl_p[i]);
 152                 value |= CTRL_U2_PORT_PDN;
 153                 writel(value, &ippc->u2_ctrl_p[i]);
 154         }
 155
 156         /* power down host ip */
 157         value = readl(&ippc->ip_pw_ctr1);
 158         value |= CTRL1_IP_HOST_PDN;
 159         writel(value, &ippc->ip_pw_ctr1);
 160
 161         /* wait for host ip to sleep */
 162         ret = readl_poll_timeout(&ippc->ip_pw_sts1, value,
 163                           (value & STS1_IP_SLEEP_STS), 100, 100000);
 164         if (ret) {
 165                 dev_err(mtk->dev, "ip sleep failed!!!\n");
 166                 return ret;
 167         }
 168         return 0;
 169 }
 170
 171 static int xhci_mtk_ssusb_config(struct xhci_hcd_mtk *mtk)
 172 {
 173         struct mu3c_ippc_regs __iomem *ippc = mtk->ippc_regs;
 174         u32 value;
 175
 176         /* reset whole ip */
 177         value = readl(&ippc->ip_pw_ctr0);
 178         value |= CTRL0_IP_SW_RST;
 179         writel(value, &ippc->ip_pw_ctr0);
 180         udelay(1);
 181         value = readl(&ippc->ip_pw_ctr0);
 182         value &= ~CTRL0_IP_SW_RST;
 183         writel(value, &ippc->ip_pw_ctr0);
 184
 185         /*
 186          * device ip is default power-on in fact
 187          * power down device ip, otherwise ip-sleep will fail
 188          */
 189         value = readl(&ippc->ip_pw_ctr2);
 190         value |= CTRL2_IP_DEV_PDN;
 191         writel(value, &ippc->ip_pw_ctr2);
 192
 193         value = readl(&ippc->ip_xhci_cap);
 194         mtk->num_u3_ports = CAP_U3_PORT_NUM(value);
 195         mtk->num_u2_ports = CAP_U2_PORT_NUM(value);
 196         dev_dbg(mtk->dev, "%s u2p:%d, u3p:%d\n", __func__,
 197                         mtk->num_u2_ports, mtk->num_u3_ports);
 198
 199         return xhci_mtk_host_enable(mtk);
 200 }
 201
 202 static int xhci_mtk_clks_enable(struct xhci_hcd_mtk *mtk)
 203 {
 204         int ret;
 205
 206         ret = clk_prepare_enable(mtk->sys_clk);
 207         if (ret) {
 208                 dev_err(mtk->dev, "failed to enable sys_clk\n");
 209                 goto sys_clk_err;
 210         }
 211
 212         if (mtk->wakeup_src) {
 213                 ret = clk_prepare_enable(mtk->wk_deb_p0);
 214                 if (ret) {
 215                         dev_err(mtk->dev, "failed to enable wk_deb_p0\n");
 216                         goto usb_p0_err;
 217                 }
 218
 219                 ret = clk_prepare_enable(mtk->wk_deb_p1);
 220                 if (ret) {
 221                         dev_err(mtk->dev, "failed to enable wk_deb_p1\n");
 222                         goto usb_p1_err;
 223                 }
 224         }
 225         return 0;
 226
 227 usb_p1_err:
 228         clk_disable_unprepare(mtk->wk_deb_p0);
 229 usb_p0_err:
 230         clk_disable_unprepare(mtk->sys_clk);
 231 sys_clk_err:
 232         return -EINVAL;
 233 }
 234
 235 static void xhci_mtk_clks_disable(struct xhci_hcd_mtk *mtk)
 236 {
 237         if (mtk->wakeup_src) {
 238                 clk_disable_unprepare(mtk->wk_deb_p1);
 239                 clk_disable_unprepare(mtk->wk_deb_p0);
 240         }
 241         clk_disable_unprepare(mtk->sys_clk);
 242 }
 243
 244 /* only clocks can be turn off for ip-sleep wakeup mode */
 245 static void usb_wakeup_ip_sleep_en(struct xhci_hcd_mtk *mtk)
 246 {
 247         u32 tmp;
 248         struct regmap *pericfg = mtk->pericfg;
 249
 250         regmap_read(pericfg, PERI_WK_CTRL1, &tmp);
 251         tmp &= ~UWK_CTL1_IS_P;
 252         tmp &= ~(UWK_CTL1_IS_C(0xf));
 253         tmp |= UWK_CTL1_IS_C(0x8);
 254         regmap_write(pericfg, PERI_WK_CTRL1, tmp);
 255         regmap_write(pericfg, PERI_WK_CTRL1, tmp | UWK_CTL1_IS_E);
 256
 257         regmap_read(pericfg, PERI_WK_CTRL1, &tmp);
 258         dev_dbg(mtk->dev, "%s(): WK_CTRL1[P6,E25,C26:29]=%#x\n",
 259                 __func__, tmp);
 260 }
 261
 262 static void usb_wakeup_ip_sleep_dis(struct xhci_hcd_mtk *mtk)
 263 {
 264         u32 tmp;
 265
 266         regmap_read(mtk->pericfg, PERI_WK_CTRL1, &tmp);
 267         tmp &= ~UWK_CTL1_IS_E;
 268         regmap_write(mtk->pericfg, PERI_WK_CTRL1, tmp);
 269 }
 270
 271 /*
 272 * for line-state wakeup mode, phy's power should not power-down
 273 * and only support cable plug in/out
 274 */
 275 static void usb_wakeup_line_state_en(struct xhci_hcd_mtk *mtk)
 276 {
 277         u32 tmp;
 278         struct regmap *pericfg = mtk->pericfg;
 279
 280         /* line-state of u2-port0 */
 281         regmap_read(pericfg, PERI_WK_CTRL1, &tmp);
 282         tmp &= ~UWK_CTL1_0P_LS_P;
 283         tmp &= ~(UWK_CTL1_0P_LS_C(0xf));
 284         tmp |= UWK_CTL1_0P_LS_C(0x8);
 285         regmap_write(pericfg, PERI_WK_CTRL1, tmp);
 286         regmap_read(pericfg, PERI_WK_CTRL1, &tmp);
 287         regmap_write(pericfg, PERI_WK_CTRL1, tmp | UWK_CTL1_0P_LS_E);
 288
 289         /* line-state of u2-port1 */
 290         regmap_read(pericfg, PERI_WK_CTRL0, &tmp);
 291         tmp &= ~(UWK_CTL1_1P_LS_C(0xf));
 292         tmp |= UWK_CTL1_1P_LS_C(0x8);
 293         regmap_write(pericfg, PERI_WK_CTRL0, tmp);
 294         regmap_write(pericfg, PERI_WK_CTRL0, tmp | UWK_CTL1_1P_LS_E);
 295 }
 296
 297 static void usb_wakeup_line_state_dis(struct xhci_hcd_mtk *mtk)
 298 {
 299         u32 tmp;
 300         struct regmap *pericfg = mtk->pericfg;
 301
 302         /* line-state of u2-port0 */
 303         regmap_read(pericfg, PERI_WK_CTRL1, &tmp);
 304         tmp &= ~UWK_CTL1_0P_LS_E;
 305         regmap_write(pericfg, PERI_WK_CTRL1, tmp);
 306
 307         /* line-state of u2-port1 */
 308         regmap_read(pericfg, PERI_WK_CTRL0, &tmp);
 309         tmp &= ~UWK_CTL1_1P_LS_E;
 310         regmap_write(pericfg, PERI_WK_CTRL0, tmp);
 311 }
 312
 313 static void usb_wakeup_enable(struct xhci_hcd_mtk *mtk)
 314 {
 315         if (mtk->wakeup_src == SSUSB_WK_IP_SLEEP)
 316                 usb_wakeup_ip_sleep_en(mtk);
 317         else if (mtk->wakeup_src == SSUSB_WK_LINE_STATE)
 318                 usb_wakeup_line_state_en(mtk);
 319 }
 320
 321 static void usb_wakeup_disable(struct xhci_hcd_mtk *mtk)
 322 {
 323         if (mtk->wakeup_src == SSUSB_WK_IP_SLEEP)
 324                 usb_wakeup_ip_sleep_dis(mtk);
 325         else if (mtk->wakeup_src == SSUSB_WK_LINE_STATE)
 326                 usb_wakeup_line_state_dis(mtk);
 327 }
 328
 329 static int usb_wakeup_of_property_parse(struct xhci_hcd_mtk *mtk,
 330                                 struct device_node *dn)
 331 {
 332         struct device *dev = mtk->dev;
 333
 334         /*
 335         * wakeup function is optional, so it is not an error if this property
 336         * does not exist, and in such case, no need to get relative
 337         * properties anymore.
 338         */
 339         of_property_read_u32(dn, "mediatek,wakeup-src", &mtk->wakeup_src);
 340         if (!mtk->wakeup_src)
 341                 return 0;
 342
 343         mtk->wk_deb_p0 = devm_clk_get(dev, "wakeup_deb_p0");
 344         if (IS_ERR(mtk->wk_deb_p0)) {
 345                 dev_err(dev, "fail to get wakeup_deb_p0\n");
 346                 return PTR_ERR(mtk->wk_deb_p0);
 347         }
 348
 349         mtk->wk_deb_p1 = devm_clk_get(dev, "wakeup_deb_p1");
 350         if (IS_ERR(mtk->wk_deb_p1)) {
 351                 dev_err(dev, "fail to get wakeup_deb_p1\n");
 352                 return PTR_ERR(mtk->wk_deb_p1);
 353         }
 354
 355         mtk->pericfg = syscon_regmap_lookup_by_phandle(dn,
 356                                                 "mediatek,syscon-wakeup");
 357         if (IS_ERR(mtk->pericfg)) {
 358                 dev_err(dev, "fail to get pericfg regs\n");
 359                 return PTR_ERR(mtk->pericfg);
 360         }
 361
 362         return 0;
 363 }
 364
 365 static int xhci_mtk_setup(struct usb_hcd *hcd);
 366 static const struct xhci_driver_overrides xhci_mtk_overrides __initconst = {
 367         .extra_priv_size = sizeof(struct xhci_hcd),
 368         .reset = xhci_mtk_setup,
 369 };
 370
 371 static struct hc_driver __read_mostly xhci_mtk_hc_driver;
 372
 373 static int xhci_mtk_phy_init(struct xhci_hcd_mtk *mtk)
 374 {
 375         int i;
 376         int ret;
 377
 378         for (i = 0; i < mtk->num_phys; i++) {
 379                 ret = phy_init(mtk->phys[i]);
 380                 if (ret)
 381                         goto exit_phy;
 382         }
 383         return 0;
 384
 385 exit_phy:
 386         for (; i > 0; i--)
 387                 phy_exit(mtk->phys[i - 1]);
 388
 389         return ret;
 390 }
 391
 392 static int xhci_mtk_phy_exit(struct xhci_hcd_mtk *mtk)
 393 {
 394         int i;
 395
 396         for (i = 0; i < mtk->num_phys; i++)
 397                 phy_exit(mtk->phys[i]);
 398
 399         return 0;
 400 }
 401
 402 static int xhci_mtk_phy_power_on(struct xhci_hcd_mtk *mtk)
 403 {
 404         int i;
 405         int ret;
 406
 407         for (i = 0; i < mtk->num_phys; i++) {
 408                 ret = phy_power_on(mtk->phys[i]);
 409                 if (ret)
 410                         goto power_off_phy;
 411         }
 412         return 0;
 413
 414 power_off_phy:
 415         for (; i > 0; i--)
 416                 phy_power_off(mtk->phys[i - 1]);
 417
 418         return ret;
 419 }
 420
 421 static void xhci_mtk_phy_power_off(struct xhci_hcd_mtk *mtk)
 422 {
 423         unsigned int i;
 424
 425         for (i = 0; i < mtk->num_phys; i++)
 426                 phy_power_off(mtk->phys[i]);
 427 }
 428
 429 static int xhci_mtk_ldos_enable(struct xhci_hcd_mtk *mtk)
 430 {
 431         int ret;
 432
 433         ret = regulator_enable(mtk->vbus);
 434         if (ret) {
 435                 dev_err(mtk->dev, "failed to enable vbus\n");
 436                 return ret;
 437         }
 438
 439         ret = regulator_enable(mtk->vusb33);
 440         if (ret) {
 441                 dev_err(mtk->dev, "failed to enable vusb33\n");
 442                 regulator_disable(mtk->vbus);
 443                 return ret;
 444         }
 445         return 0;
 446 }
 447
 448 static void xhci_mtk_ldos_disable(struct xhci_hcd_mtk *mtk)
 449 {
 450         regulator_disable(mtk->vbus);
 451         regulator_disable(mtk->vusb33);
 452 }
 453
 454 static void xhci_mtk_quirks(struct device *dev, struct xhci_hcd *xhci)
 455 {
 456         struct usb_hcd *hcd = xhci_to_hcd(xhci);
 457         struct xhci_hcd_mtk *mtk = hcd_to_mtk(hcd);
 458
 459         /*
 460          * As of now platform drivers don't provide MSI support so we ensure
 461          * here that the generic code does not try to make a pci_dev from our
 462          * dev struct in order to setup MSI
 463          */
 464         xhci->quirks |= XHCI_PLAT;
 465         xhci->quirks |= XHCI_MTK_HOST;
 466         /*
 467          * MTK host controller gives a spurious successful event after a
 468          * short transfer. Ignore it.
 469          */
 470         xhci->quirks |= XHCI_SPURIOUS_SUCCESS;
 471         if (mtk->lpm_support)
 472                 xhci->quirks |= XHCI_LPM_SUPPORT;
 473 }
 474
 475 /* called during probe() after chip reset completes */
 476 static int xhci_mtk_setup(struct usb_hcd *hcd)
 477 {
 478         struct xhci_hcd_mtk *mtk = hcd_to_mtk(hcd);
 479         int ret;
 480
 481         if (usb_hcd_is_primary_hcd(hcd)) {
 482                 ret = xhci_mtk_ssusb_config(mtk);
 483                 if (ret)
 484                         return ret;
 485                 ret = xhci_mtk_sch_init(mtk);
 486                 if (ret)
 487                         return ret;
 488         }
 489
 490         return xhci_gen_setup(hcd, xhci_mtk_quirks);
 491 }
 492
 493 static int xhci_mtk_probe(struct platform_device *pdev)
 494 {
 495         struct device *dev = &pdev->dev;
 496         struct device_node *node = dev->of_node;
 497         struct xhci_hcd_mtk *mtk;
 498         const struct hc_driver *driver;
 499         struct xhci_hcd *xhci;
 500         struct resource *res;
 501         struct usb_hcd *hcd;
 502         struct phy *phy;
 503         int phy_num;
 504         int ret = -ENODEV;
 505         int irq;
 506
 507         if (usb_disabled())
 508                 return -ENODEV;
 509
 510         driver = &xhci_mtk_hc_driver;
 511         mtk = devm_kzalloc(dev, sizeof(*mtk), GFP_KERNEL);
 512         if (!mtk)
 513                 return -ENOMEM;
 514
 515         mtk->dev = dev;
 516         mtk->vbus = devm_regulator_get(dev, "vbus");
 517         if (IS_ERR(mtk->vbus)) {
 518                 dev_err(dev, "fail to get vbus\n");
 519                 return PTR_ERR(mtk->vbus);
 520         }
 521
 522         mtk->vusb33 = devm_regulator_get(dev, "vusb33");
 523         if (IS_ERR(mtk->vusb33)) {
 524                 dev_err(dev, "fail to get vusb33\n");
 525                 return PTR_ERR(mtk->vusb33);
 526         }
 527
 528         mtk->sys_clk = devm_clk_get(dev, "sys_ck");
 529         if (IS_ERR(mtk->sys_clk)) {
 530                 dev_err(dev, "fail to get sys_ck\n");
 531                 return PTR_ERR(mtk->sys_clk);
 532         }
 533
 534         mtk->lpm_support = of_property_read_bool(node, "usb3-lpm-capable");
 535
 536         ret = usb_wakeup_of_property_parse(mtk, node);
 537         if (ret)
 538                 return ret;
 539
 540         mtk->num_phys = of_count_phandle_with_args(node,
 541                         "phys", "#phy-cells");
 542         if (mtk->num_phys > 0) {
 543                 mtk->phys = devm_kcalloc(dev, mtk->num_phys,
 544                                         sizeof(*mtk->phys), GFP_KERNEL);
 545                 if (!mtk->phys)
 546                         return -ENOMEM;
 547         } else {
 548                 mtk->num_phys = 0;
 549         }
 550         pm_runtime_enable(dev);
 551         pm_runtime_get_sync(dev);
 552         device_enable_async_suspend(dev);
 553
 554         ret = xhci_mtk_ldos_enable(mtk);
 555         if (ret)
 556                 goto disable_pm;
 557
 558         ret = xhci_mtk_clks_enable(mtk);
 559         if (ret)
 560                 goto disable_ldos;
 561
 562         irq = platform_get_irq(pdev, 0);
 563         if (irq < 0) {
 564                 ret = irq;
 565                 goto disable_clk;
 566         }
 567
 568         /* Initialize dma_mask and coherent_dma_mask to 32-bits */
 569         ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
 570         if (ret)
 571                 goto disable_clk;
 572
 573         if (!dev->dma_mask)
 574                 dev->dma_mask = &dev->coherent_dma_mask;
 575         else
 576                 dma_set_mask(dev, DMA_BIT_MASK(32));
 577
 578         hcd = usb_create_hcd(driver, dev, dev_name(dev));
 579         if (!hcd) {
 580                 ret = -ENOMEM;
 581                 goto disable_clk;
 582         }
 583
 584         /*
 585          * USB 2.0 roothub is stored in the platform_device.
 586          * Swap it with mtk HCD.
 587          */
 588         mtk->hcd = platform_get_drvdata(pdev);
 589         platform_set_drvdata(pdev, mtk);
 590
 591         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 592         hcd->regs = devm_ioremap_resource(dev, res);
 593         if (IS_ERR(hcd->regs)) {
 594                 ret = PTR_ERR(hcd->regs);
 595                 goto put_usb2_hcd;
 596         }
 597         hcd->rsrc_start = res->start;
 598         hcd->rsrc_len = resource_size(res);
 599
 600         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 601         mtk->ippc_regs = devm_ioremap_resource(dev, res);
 602         if (IS_ERR(mtk->ippc_regs)) {
 603                 ret = PTR_ERR(mtk->ippc_regs);
 604                 goto put_usb2_hcd;
 605         }
 606
 607         for (phy_num = 0; phy_num < mtk->num_phys; phy_num++) {
 608                 phy = devm_of_phy_get_by_index(dev, node, phy_num);
 609                 if (IS_ERR(phy)) {
 610                         ret = PTR_ERR(phy);
 611                         goto put_usb2_hcd;
 612                 }
 613                 mtk->phys[phy_num] = phy;
 614         }
 615
 616         ret = xhci_mtk_phy_init(mtk);
 617         if (ret)
 618                 goto put_usb2_hcd;
 619
 620         ret = xhci_mtk_phy_power_on(mtk);
 621         if (ret)
 622                 goto exit_phys;
 623
 624         device_init_wakeup(dev, true);
 625
 626         xhci = hcd_to_xhci(hcd);
 627         xhci->main_hcd = hcd;
 628         xhci->shared_hcd = usb_create_shared_hcd(driver, dev,
 629                         dev_name(dev), hcd);
 630         if (!xhci->shared_hcd) {
 631                 ret = -ENOMEM;
 632                 goto power_off_phys;
 633         }
 634
 635         ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
 636         if (ret)
 637                 goto put_usb3_hcd;
 638
 639         if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
 640                 xhci->shared_hcd->can_do_streams = 1;
 641
 642         ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
 643         if (ret)
 644                 goto dealloc_usb2_hcd;
 645
 646         return 0;
 647
 648 dealloc_usb2_hcd:
 649         usb_remove_hcd(hcd);
 650
 651 put_usb3_hcd:
 652         xhci_mtk_sch_exit(mtk);
 653         usb_put_hcd(xhci->shared_hcd);
 654
 655 power_off_phys:
 656         xhci_mtk_phy_power_off(mtk);
 657         device_init_wakeup(dev, false);
 658
 659 exit_phys:
 660         xhci_mtk_phy_exit(mtk);
 661
 662 put_usb2_hcd:
 663         usb_put_hcd(hcd);
 664
 665 disable_clk:
 666         xhci_mtk_clks_disable(mtk);
 667
 668 disable_ldos:
 669         xhci_mtk_ldos_disable(mtk);
 670
 671 disable_pm:
 672         pm_runtime_put_sync(dev);
 673         pm_runtime_disable(dev);
 674         return ret;
 675 }
 676
 677 static int xhci_mtk_remove(struct platform_device *dev)
 678 {
 679         struct xhci_hcd_mtk *mtk = platform_get_drvdata(dev);
 680         struct usb_hcd  *hcd = mtk->hcd;
 681         struct xhci_hcd *xhci = hcd_to_xhci(hcd);
 682
 683         usb_remove_hcd(xhci->shared_hcd);
 684         xhci_mtk_phy_power_off(mtk);
 685         xhci_mtk_phy_exit(mtk);
 686         device_init_wakeup(&dev->dev, false);
 687
 688         usb_remove_hcd(hcd);
 689         usb_put_hcd(xhci->shared_hcd);
 690         usb_put_hcd(hcd);
 691         xhci_mtk_sch_exit(mtk);
 692         xhci_mtk_clks_disable(mtk);
 693         xhci_mtk_ldos_disable(mtk);
 694         pm_runtime_put_sync(&dev->dev);
 695         pm_runtime_disable(&dev->dev);
 696
 697         return 0;
 698 }
 699
 700 /*
 701  * if ip sleep fails, and all clocks are disabled, access register will hang
 702  * AHB bus, so stop polling roothubs to avoid regs access on bus suspend.
 703  * and no need to check whether ip sleep failed or not; this will cause SPM
 704  * to wake up system immediately after system suspend complete if ip sleep
 705  * fails, it is what we wanted.
 706  */
 707 static int __maybe_unused xhci_mtk_suspend(struct device *dev)
 708 {
 709         struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev);
 710         struct usb_hcd *hcd = mtk->hcd;
 711         struct xhci_hcd *xhci = hcd_to_xhci(hcd);
 712
 713         xhci_dbg(xhci, "%s: stop port polling\n", __func__);
 714         clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
 715         del_timer_sync(&hcd->rh_timer);
 716         clear_bit(HCD_FLAG_POLL_RH, &xhci->shared_hcd->flags);
 717         del_timer_sync(&xhci->shared_hcd->rh_timer);
 718
 719         xhci_mtk_host_disable(mtk);
 720         xhci_mtk_phy_power_off(mtk);
 721         xhci_mtk_clks_disable(mtk);
 722         usb_wakeup_enable(mtk);
 723         return 0;
 724 }
 725
 726 static int __maybe_unused xhci_mtk_resume(struct device *dev)
 727 {
 728         struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev);
 729         struct usb_hcd *hcd = mtk->hcd;
 730         struct xhci_hcd *xhci = hcd_to_xhci(hcd);
 731
 732         usb_wakeup_disable(mtk);
 733         xhci_mtk_clks_enable(mtk);
 734         xhci_mtk_phy_power_on(mtk);
 735         xhci_mtk_host_enable(mtk);
 736
 737         xhci_dbg(xhci, "%s: restart port polling\n", __func__);
 738         set_bit(HCD_FLAG_POLL_RH, &xhci->shared_hcd->flags);
 739         usb_hcd_poll_rh_status(xhci->shared_hcd);
 740         set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
 741         usb_hcd_poll_rh_status(hcd);
 742         return 0;
 743 }
 744
 745 static const struct dev_pm_ops xhci_mtk_pm_ops = {
 746         SET_SYSTEM_SLEEP_PM_OPS(xhci_mtk_suspend, xhci_mtk_resume)
 747 };
 748 #define DEV_PM_OPS IS_ENABLED(CONFIG_PM) ? &xhci_mtk_pm_ops : NULL
 749
 750 #ifdef CONFIG_OF
 751 static const struct of_device_id mtk_xhci_of_match[] = {
 752         { .compatible = "mediatek,mt8173-xhci"},
 753         { },
 754 };
 755 MODULE_DEVICE_TABLE(of, mtk_xhci_of_match);
 756 #endif
 757
 758 static struct platform_driver mtk_xhci_driver = {
 759         .probe  = xhci_mtk_probe,
 760         .remove = xhci_mtk_remove,
 761         .driver = {
 762                 .name = "xhci-mtk",
 763                 .pm = DEV_PM_OPS,
 764                 .of_match_table = of_match_ptr(mtk_xhci_of_match),
 765         },
 766 };
 767 MODULE_ALIAS("platform:xhci-mtk");
 768
 769 static int __init xhci_mtk_init(void)
 770 {
 771         xhci_init_driver(&xhci_mtk_hc_driver, &xhci_mtk_overrides);
 772         return platform_driver_register(&mtk_xhci_driver);
 773 }
 774 module_init(xhci_mtk_init);
 775
 776 static void __exit xhci_mtk_exit(void)
 777 {
 778         platform_driver_unregister(&mtk_xhci_driver);
 779 }
 780 module_exit(xhci_mtk_exit);
 781
 782 MODULE_AUTHOR("Chunfeng Yun <chunfeng.yun@mediatek.com>");
 783 MODULE_DESCRIPTION("MediaTek xHCI Host Controller Driver");
 784 MODULE_LICENSE("GPL v2");