Michal Nazarewicz | e538dfd | 2011-08-30 17:11:19 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Provides code common for host and device side USB. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License as |
| 6 | * published by the Free Software Foundation, version 2. |
| 7 | * |
| 8 | * If either host side (ie. CONFIG_USB=y) or device side USB stack |
| 9 | * (ie. CONFIG_USB_GADGET=y) is compiled in the kernel, this module is |
| 10 | * compiled-in as well. Otherwise, if either of the two stacks is |
| 11 | * compiled as module, this file is compiled as module as well. |
| 12 | */ |
| 13 | |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/module.h> |
Michael Grzeschik | 1c9af65 | 2013-06-13 17:59:55 +0300 | [diff] [blame] | 16 | #include <linux/of.h> |
Michal Nazarewicz | e538dfd | 2011-08-30 17:11:19 +0200 | [diff] [blame] | 17 | #include <linux/usb/ch9.h> |
Michael Grzeschik | 1c9af65 | 2013-06-13 17:59:55 +0300 | [diff] [blame] | 18 | #include <linux/usb/of.h> |
Felipe Balbi | 7009bdd7 | 2013-03-07 10:45:56 +0200 | [diff] [blame] | 19 | #include <linux/usb/otg.h> |
| 20 | |
| 21 | const char *usb_otg_state_string(enum usb_otg_state state) |
| 22 | { |
| 23 | static const char *const names[] = { |
| 24 | [OTG_STATE_A_IDLE] = "a_idle", |
| 25 | [OTG_STATE_A_WAIT_VRISE] = "a_wait_vrise", |
| 26 | [OTG_STATE_A_WAIT_BCON] = "a_wait_bcon", |
| 27 | [OTG_STATE_A_HOST] = "a_host", |
| 28 | [OTG_STATE_A_SUSPEND] = "a_suspend", |
| 29 | [OTG_STATE_A_PERIPHERAL] = "a_peripheral", |
| 30 | [OTG_STATE_A_WAIT_VFALL] = "a_wait_vfall", |
| 31 | [OTG_STATE_A_VBUS_ERR] = "a_vbus_err", |
| 32 | [OTG_STATE_B_IDLE] = "b_idle", |
| 33 | [OTG_STATE_B_SRP_INIT] = "b_srp_init", |
| 34 | [OTG_STATE_B_PERIPHERAL] = "b_peripheral", |
| 35 | [OTG_STATE_B_WAIT_ACON] = "b_wait_acon", |
| 36 | [OTG_STATE_B_HOST] = "b_host", |
| 37 | }; |
| 38 | |
| 39 | if (state < 0 || state >= ARRAY_SIZE(names)) |
| 40 | return "UNDEFINED"; |
| 41 | |
| 42 | return names[state]; |
| 43 | } |
| 44 | EXPORT_SYMBOL_GPL(usb_otg_state_string); |
Michal Nazarewicz | e538dfd | 2011-08-30 17:11:19 +0200 | [diff] [blame] | 45 | |
Felipe Balbi | 1494a1f | 2013-06-30 13:56:45 +0300 | [diff] [blame] | 46 | static const char *const speed_names[] = { |
| 47 | [USB_SPEED_UNKNOWN] = "UNKNOWN", |
| 48 | [USB_SPEED_LOW] = "low-speed", |
| 49 | [USB_SPEED_FULL] = "full-speed", |
| 50 | [USB_SPEED_HIGH] = "high-speed", |
| 51 | [USB_SPEED_WIRELESS] = "wireless", |
| 52 | [USB_SPEED_SUPER] = "super-speed", |
| 53 | }; |
| 54 | |
Michal Nazarewicz | e538dfd | 2011-08-30 17:11:19 +0200 | [diff] [blame] | 55 | const char *usb_speed_string(enum usb_device_speed speed) |
| 56 | { |
Felipe Balbi | 1494a1f | 2013-06-30 13:56:45 +0300 | [diff] [blame] | 57 | if (speed < 0 || speed >= ARRAY_SIZE(speed_names)) |
Michal Nazarewicz | e538dfd | 2011-08-30 17:11:19 +0200 | [diff] [blame] | 58 | speed = USB_SPEED_UNKNOWN; |
Felipe Balbi | 1494a1f | 2013-06-30 13:56:45 +0300 | [diff] [blame] | 59 | return speed_names[speed]; |
Michal Nazarewicz | e538dfd | 2011-08-30 17:11:19 +0200 | [diff] [blame] | 60 | } |
| 61 | EXPORT_SYMBOL_GPL(usb_speed_string); |
| 62 | |
Felipe Balbi | d1e3d75 | 2013-01-24 22:29:48 +0200 | [diff] [blame] | 63 | const char *usb_state_string(enum usb_device_state state) |
| 64 | { |
| 65 | static const char *const names[] = { |
| 66 | [USB_STATE_NOTATTACHED] = "not attached", |
| 67 | [USB_STATE_ATTACHED] = "attached", |
| 68 | [USB_STATE_POWERED] = "powered", |
| 69 | [USB_STATE_RECONNECTING] = "reconnecting", |
| 70 | [USB_STATE_UNAUTHENTICATED] = "unauthenticated", |
| 71 | [USB_STATE_DEFAULT] = "default", |
Peter Chen | f9076e2 | 2014-04-09 14:48:58 +0800 | [diff] [blame] | 72 | [USB_STATE_ADDRESS] = "addressed", |
Felipe Balbi | d1e3d75 | 2013-01-24 22:29:48 +0200 | [diff] [blame] | 73 | [USB_STATE_CONFIGURED] = "configured", |
| 74 | [USB_STATE_SUSPENDED] = "suspended", |
| 75 | }; |
| 76 | |
| 77 | if (state < 0 || state >= ARRAY_SIZE(names)) |
| 78 | return "UNKNOWN"; |
| 79 | |
| 80 | return names[state]; |
| 81 | } |
| 82 | EXPORT_SYMBOL_GPL(usb_state_string); |
| 83 | |
Michael Grzeschik | 1c9af65 | 2013-06-13 17:59:55 +0300 | [diff] [blame] | 84 | #ifdef CONFIG_OF |
| 85 | static const char *const usb_dr_modes[] = { |
| 86 | [USB_DR_MODE_UNKNOWN] = "", |
| 87 | [USB_DR_MODE_HOST] = "host", |
| 88 | [USB_DR_MODE_PERIPHERAL] = "peripheral", |
| 89 | [USB_DR_MODE_OTG] = "otg", |
| 90 | }; |
| 91 | |
| 92 | /** |
| 93 | * of_usb_get_dr_mode - Get dual role mode for given device_node |
| 94 | * @np: Pointer to the given device_node |
| 95 | * |
| 96 | * The function gets phy interface string from property 'dr_mode', |
| 97 | * and returns the correspondig enum usb_dr_mode |
| 98 | */ |
| 99 | enum usb_dr_mode of_usb_get_dr_mode(struct device_node *np) |
| 100 | { |
| 101 | const char *dr_mode; |
| 102 | int err, i; |
| 103 | |
| 104 | err = of_property_read_string(np, "dr_mode", &dr_mode); |
| 105 | if (err < 0) |
| 106 | return USB_DR_MODE_UNKNOWN; |
| 107 | |
| 108 | for (i = 0; i < ARRAY_SIZE(usb_dr_modes); i++) |
| 109 | if (!strcmp(dr_mode, usb_dr_modes[i])) |
| 110 | return i; |
| 111 | |
| 112 | return USB_DR_MODE_UNKNOWN; |
| 113 | } |
| 114 | EXPORT_SYMBOL_GPL(of_usb_get_dr_mode); |
Felipe Balbi | 1494a1f | 2013-06-30 13:56:45 +0300 | [diff] [blame] | 115 | |
| 116 | /** |
| 117 | * of_usb_get_maximum_speed - Get maximum requested speed for a given USB |
| 118 | * controller. |
| 119 | * @np: Pointer to the given device_node |
| 120 | * |
| 121 | * The function gets the maximum speed string from property "maximum-speed", |
| 122 | * and returns the corresponding enum usb_device_speed. |
| 123 | */ |
| 124 | enum usb_device_speed of_usb_get_maximum_speed(struct device_node *np) |
| 125 | { |
| 126 | const char *maximum_speed; |
| 127 | int err; |
| 128 | int i; |
| 129 | |
| 130 | err = of_property_read_string(np, "maximum-speed", &maximum_speed); |
| 131 | if (err < 0) |
| 132 | return USB_SPEED_UNKNOWN; |
| 133 | |
| 134 | for (i = 0; i < ARRAY_SIZE(speed_names); i++) |
| 135 | if (strcmp(maximum_speed, speed_names[i]) == 0) |
| 136 | return i; |
| 137 | |
| 138 | return USB_SPEED_UNKNOWN; |
| 139 | } |
| 140 | EXPORT_SYMBOL_GPL(of_usb_get_maximum_speed); |
| 141 | |
Peter Chen | 05f8b35 | 2014-08-19 09:51:55 +0800 | [diff] [blame] | 142 | /** |
| 143 | * of_usb_host_tpl_support - to get if Targeted Peripheral List is supported |
| 144 | * for given targeted hosts (non-PC hosts) |
| 145 | * @np: Pointer to the given device_node |
| 146 | * |
| 147 | * The function gets if the targeted hosts support TPL or not |
| 148 | */ |
| 149 | bool of_usb_host_tpl_support(struct device_node *np) |
| 150 | { |
| 151 | if (of_find_property(np, "tpl-support", NULL)) |
| 152 | return true; |
| 153 | |
| 154 | return false; |
| 155 | } |
| 156 | EXPORT_SYMBOL_GPL(of_usb_host_tpl_support); |
Michael Grzeschik | 1c9af65 | 2013-06-13 17:59:55 +0300 | [diff] [blame] | 157 | #endif |
| 158 | |
Michal Nazarewicz | e538dfd | 2011-08-30 17:11:19 +0200 | [diff] [blame] | 159 | MODULE_LICENSE("GPL"); |