1 /* Copyright (c) 2010, Code Aurora Forum. All rights reserved. 2 * 3 * This program is free software; you can redistribute it and/or modify 4 * it under the terms of the GNU General Public License version 2 and 5 * only version 2 as published by the Free Software Foundation. 6 */ 7 8 #include <linux/module.h> 9 #include <linux/platform_device.h> 10 #include <linux/pm_runtime.h> 11 #include <linux/usb/msm_hsusb_hw.h> 12 #include <linux/usb/ulpi.h> 13 #include <linux/usb/gadget.h> 14 #include <linux/usb/chipidea.h> 15 16 #include "ci.h" 17 18 #define MSM_USB_BASE (ci->hw_bank.abs) 19 20 static void ci_hdrc_msm_notify_event(struct ci_hdrc *ci, unsigned event) 21 { 22 struct device *dev = ci->gadget.dev.parent; 23 24 switch (event) { 25 case CI_HDRC_CONTROLLER_RESET_EVENT: 26 dev_dbg(dev, "CI_HDRC_CONTROLLER_RESET_EVENT received\n"); 27 writel(0, USB_AHBBURST); 28 /* use AHB transactor, allow posted data writes */ 29 writel(0x8, USB_AHBMODE); 30 usb_phy_init(ci->usb_phy); 31 break; 32 case CI_HDRC_CONTROLLER_STOPPED_EVENT: 33 dev_dbg(dev, "CI_HDRC_CONTROLLER_STOPPED_EVENT received\n"); 34 /* 35 * Put the phy in non-driving mode. Otherwise host 36 * may not detect soft-disconnection. 37 */ 38 usb_phy_notify_disconnect(ci->usb_phy, USB_SPEED_UNKNOWN); 39 break; 40 default: 41 dev_dbg(dev, "unknown ci_hdrc event\n"); 42 break; 43 } 44 } 45 46 static struct ci_hdrc_platform_data ci_hdrc_msm_platdata = { 47 .name = "ci_hdrc_msm", 48 .capoffset = DEF_CAPOFFSET, 49 .flags = CI_HDRC_REGS_SHARED | 50 CI_HDRC_DISABLE_STREAMING, 51 52 .notify_event = ci_hdrc_msm_notify_event, 53 }; 54 55 static int ci_hdrc_msm_probe(struct platform_device *pdev) 56 { 57 struct platform_device *plat_ci; 58 struct usb_phy *phy; 59 60 dev_dbg(&pdev->dev, "ci_hdrc_msm_probe\n"); 61 62 /* 63 * OTG(PHY) driver takes care of PHY initialization, clock management, 64 * powering up VBUS, mapping of registers address space and power 65 * management. 66 */ 67 phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0); 68 if (IS_ERR(phy)) 69 return PTR_ERR(phy); 70 71 ci_hdrc_msm_platdata.usb_phy = phy; 72 73 plat_ci = ci_hdrc_add_device(&pdev->dev, 74 pdev->resource, pdev->num_resources, 75 &ci_hdrc_msm_platdata); 76 if (IS_ERR(plat_ci)) { 77 dev_err(&pdev->dev, "ci_hdrc_add_device failed!\n"); 78 return PTR_ERR(plat_ci); 79 } 80 81 platform_set_drvdata(pdev, plat_ci); 82 83 pm_runtime_no_callbacks(&pdev->dev); 84 pm_runtime_enable(&pdev->dev); 85 86 return 0; 87 } 88 89 static int ci_hdrc_msm_remove(struct platform_device *pdev) 90 { 91 struct platform_device *plat_ci = platform_get_drvdata(pdev); 92 93 pm_runtime_disable(&pdev->dev); 94 ci_hdrc_remove_device(plat_ci); 95 96 return 0; 97 } 98 99 static const struct of_device_id msm_ci_dt_match[] = { 100 { .compatible = "qcom,ci-hdrc", }, 101 { } 102 }; 103 MODULE_DEVICE_TABLE(of, msm_ci_dt_match); 104 105 static struct platform_driver ci_hdrc_msm_driver = { 106 .probe = ci_hdrc_msm_probe, 107 .remove = ci_hdrc_msm_remove, 108 .driver = { 109 .name = "msm_hsusb", 110 .of_match_table = msm_ci_dt_match, 111 }, 112 }; 113 114 module_platform_driver(ci_hdrc_msm_driver); 115 116 MODULE_ALIAS("platform:msm_hsusb"); 117 MODULE_ALIAS("platform:ci13xxx_msm"); 118 MODULE_LICENSE("GPL v2"); 119