| 1 | /* $NetBSD: nouveau_subdev_gpio_base.c,v 1.1.1.1 2014/08/06 12:36:30 riastradh Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright 2011 Red Hat Inc. |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 7 | * copy of this software and associated documentation files (the "Software"), |
| 8 | * to deal in the Software without restriction, including without limitation |
| 9 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 10 | * and/or sell copies of the Software, and to permit persons to whom the |
| 11 | * Software is furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in |
| 14 | * all copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 19 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 20 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 21 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| 22 | * OTHER DEALINGS IN THE SOFTWARE. |
| 23 | * |
| 24 | * Authors: Ben Skeggs |
| 25 | */ |
| 26 | |
| 27 | #include <sys/cdefs.h> |
| 28 | __KERNEL_RCSID(0, "$NetBSD: nouveau_subdev_gpio_base.c,v 1.1.1.1 2014/08/06 12:36:30 riastradh Exp $" ); |
| 29 | |
| 30 | #include <subdev/gpio.h> |
| 31 | #include <subdev/bios.h> |
| 32 | #include <subdev/bios/gpio.h> |
| 33 | |
| 34 | static int |
| 35 | nouveau_gpio_drive(struct nouveau_gpio *gpio, |
| 36 | int idx, int line, int dir, int out) |
| 37 | { |
| 38 | return gpio->drive ? gpio->drive(gpio, line, dir, out) : -ENODEV; |
| 39 | } |
| 40 | |
| 41 | static int |
| 42 | nouveau_gpio_sense(struct nouveau_gpio *gpio, int idx, int line) |
| 43 | { |
| 44 | return gpio->sense ? gpio->sense(gpio, line) : -ENODEV; |
| 45 | } |
| 46 | |
| 47 | static int |
| 48 | nouveau_gpio_find(struct nouveau_gpio *gpio, int idx, u8 tag, u8 line, |
| 49 | struct dcb_gpio_func *func) |
| 50 | { |
| 51 | struct nouveau_bios *bios = nouveau_bios(gpio); |
| 52 | u8 ver, len; |
| 53 | u16 data; |
| 54 | |
| 55 | if (line == 0xff && tag == 0xff) |
| 56 | return -EINVAL; |
| 57 | |
| 58 | data = dcb_gpio_match(bios, idx, tag, line, &ver, &len, func); |
| 59 | if (data) |
| 60 | return 0; |
| 61 | |
| 62 | /* Apple iMac G4 NV18 */ |
| 63 | if (nv_device_match(nv_object(gpio), 0x0189, 0x10de, 0x0010)) { |
| 64 | if (tag == DCB_GPIO_TVDAC0) { |
| 65 | *func = (struct dcb_gpio_func) { |
| 66 | .func = DCB_GPIO_TVDAC0, |
| 67 | .line = 4, |
| 68 | .log[0] = 0, |
| 69 | .log[1] = 1, |
| 70 | }; |
| 71 | return 0; |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | return -ENOENT; |
| 76 | } |
| 77 | |
| 78 | static int |
| 79 | nouveau_gpio_set(struct nouveau_gpio *gpio, int idx, u8 tag, u8 line, int state) |
| 80 | { |
| 81 | struct dcb_gpio_func func; |
| 82 | int ret; |
| 83 | |
| 84 | ret = nouveau_gpio_find(gpio, idx, tag, line, &func); |
| 85 | if (ret == 0) { |
| 86 | int dir = !!(func.log[state] & 0x02); |
| 87 | int out = !!(func.log[state] & 0x01); |
| 88 | ret = nouveau_gpio_drive(gpio, idx, func.line, dir, out); |
| 89 | } |
| 90 | |
| 91 | return ret; |
| 92 | } |
| 93 | |
| 94 | static int |
| 95 | nouveau_gpio_get(struct nouveau_gpio *gpio, int idx, u8 tag, u8 line) |
| 96 | { |
| 97 | struct dcb_gpio_func func; |
| 98 | int ret; |
| 99 | |
| 100 | ret = nouveau_gpio_find(gpio, idx, tag, line, &func); |
| 101 | if (ret == 0) { |
| 102 | ret = nouveau_gpio_sense(gpio, idx, func.line); |
| 103 | if (ret >= 0) |
| 104 | ret = (ret == (func.log[1] & 1)); |
| 105 | } |
| 106 | |
| 107 | return ret; |
| 108 | } |
| 109 | |
| 110 | void |
| 111 | _nouveau_gpio_dtor(struct nouveau_object *object) |
| 112 | { |
| 113 | struct nouveau_gpio *gpio = (void *)object; |
| 114 | nouveau_event_destroy(&gpio->events); |
| 115 | nouveau_subdev_destroy(&gpio->base); |
| 116 | } |
| 117 | |
| 118 | int |
| 119 | nouveau_gpio_create_(struct nouveau_object *parent, |
| 120 | struct nouveau_object *engine, |
| 121 | struct nouveau_oclass *oclass, int lines, |
| 122 | int length, void **pobject) |
| 123 | { |
| 124 | struct nouveau_gpio *gpio; |
| 125 | int ret; |
| 126 | |
| 127 | ret = nouveau_subdev_create_(parent, engine, oclass, 0, "GPIO" , "gpio" , |
| 128 | length, pobject); |
| 129 | gpio = *pobject; |
| 130 | if (ret) |
| 131 | return ret; |
| 132 | |
| 133 | ret = nouveau_event_create(lines, &gpio->events); |
| 134 | if (ret) |
| 135 | return ret; |
| 136 | |
| 137 | gpio->find = nouveau_gpio_find; |
| 138 | gpio->set = nouveau_gpio_set; |
| 139 | gpio->get = nouveau_gpio_get; |
| 140 | return 0; |
| 141 | } |
| 142 | |
| 143 | static struct dmi_system_id gpio_reset_ids[] = { |
| 144 | { |
| 145 | .ident = "Apple Macbook 10,1" , |
| 146 | .matches = { |
| 147 | DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc." ), |
| 148 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro10,1" ), |
| 149 | } |
| 150 | }, |
| 151 | { } |
| 152 | }; |
| 153 | |
| 154 | int |
| 155 | nouveau_gpio_init(struct nouveau_gpio *gpio) |
| 156 | { |
| 157 | int ret = nouveau_subdev_init(&gpio->base); |
| 158 | if (ret == 0 && gpio->reset) { |
| 159 | if (dmi_check_system(gpio_reset_ids)) |
| 160 | gpio->reset(gpio, DCB_GPIO_UNUSED); |
| 161 | } |
| 162 | return ret; |
| 163 | } |
| 164 | |