1 /*
2 * Copyright 2011 Red Hat Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * Authors: Ben Skeggs
23 */
24 #include "priv.h"
25
26 #include <core/option.h>
27 #include <core/notify.h>
28
29 static int
nvkm_gpio_drive(struct nvkm_gpio * gpio,int idx,int line,int dir,int out)30 nvkm_gpio_drive(struct nvkm_gpio *gpio, int idx, int line, int dir, int out)
31 {
32 return gpio->func->drive(gpio, line, dir, out);
33 }
34
35 static int
nvkm_gpio_sense(struct nvkm_gpio * gpio,int idx,int line)36 nvkm_gpio_sense(struct nvkm_gpio *gpio, int idx, int line)
37 {
38 return gpio->func->sense(gpio, line);
39 }
40
41 void
nvkm_gpio_reset(struct nvkm_gpio * gpio,u8 func)42 nvkm_gpio_reset(struct nvkm_gpio *gpio, u8 func)
43 {
44 if (gpio->func->reset)
45 gpio->func->reset(gpio, func);
46 }
47
48 int
nvkm_gpio_find(struct nvkm_gpio * gpio,int idx,u8 tag,u8 line,struct dcb_gpio_func * func)49 nvkm_gpio_find(struct nvkm_gpio *gpio, int idx, u8 tag, u8 line,
50 struct dcb_gpio_func *func)
51 {
52 struct nvkm_device *device = gpio->subdev.device;
53 struct nvkm_bios *bios = device->bios;
54 u8 ver, len;
55 u16 data;
56
57 if (line == 0xff && tag == 0xff)
58 return -EINVAL;
59
60 data = dcb_gpio_match(bios, idx, tag, line, &ver, &len, func);
61 if (data)
62 return 0;
63
64 /* Apple iMac G4 NV18 */
65 if (device->quirk && device->quirk->tv_gpio) {
66 if (tag == DCB_GPIO_TVDAC0) {
67 *func = (struct dcb_gpio_func) {
68 .func = DCB_GPIO_TVDAC0,
69 .line = device->quirk->tv_gpio,
70 .log[0] = 0,
71 .log[1] = 1,
72 };
73 return 0;
74 }
75 }
76
77 return -ENOENT;
78 }
79
80 int
nvkm_gpio_set(struct nvkm_gpio * gpio,int idx,u8 tag,u8 line,int state)81 nvkm_gpio_set(struct nvkm_gpio *gpio, int idx, u8 tag, u8 line, int state)
82 {
83 struct dcb_gpio_func func;
84 int ret;
85
86 ret = nvkm_gpio_find(gpio, idx, tag, line, &func);
87 if (ret == 0) {
88 int dir = !!(func.log[state] & 0x02);
89 int out = !!(func.log[state] & 0x01);
90 ret = nvkm_gpio_drive(gpio, idx, func.line, dir, out);
91 }
92
93 return ret;
94 }
95
96 int
nvkm_gpio_get(struct nvkm_gpio * gpio,int idx,u8 tag,u8 line)97 nvkm_gpio_get(struct nvkm_gpio *gpio, int idx, u8 tag, u8 line)
98 {
99 struct dcb_gpio_func func;
100 int ret;
101
102 ret = nvkm_gpio_find(gpio, idx, tag, line, &func);
103 if (ret == 0) {
104 ret = nvkm_gpio_sense(gpio, idx, func.line);
105 if (ret >= 0)
106 ret = (ret == (func.log[1] & 1));
107 }
108
109 return ret;
110 }
111
112 static void
nvkm_gpio_intr_fini(struct nvkm_event * event,int type,int index)113 nvkm_gpio_intr_fini(struct nvkm_event *event, int type, int index)
114 {
115 struct nvkm_gpio *gpio = container_of(event, typeof(*gpio), event);
116 gpio->func->intr_mask(gpio, type, 1 << index, 0);
117 }
118
119 static void
nvkm_gpio_intr_init(struct nvkm_event * event,int type,int index)120 nvkm_gpio_intr_init(struct nvkm_event *event, int type, int index)
121 {
122 struct nvkm_gpio *gpio = container_of(event, typeof(*gpio), event);
123 gpio->func->intr_mask(gpio, type, 1 << index, 1 << index);
124 }
125
126 static int
nvkm_gpio_intr_ctor(struct nvkm_object * object,void * data,u32 size,struct nvkm_notify * notify)127 nvkm_gpio_intr_ctor(struct nvkm_object *object, void *data, u32 size,
128 struct nvkm_notify *notify)
129 {
130 struct nvkm_gpio_ntfy_req *req = data;
131 if (!WARN_ON(size != sizeof(*req))) {
132 notify->size = sizeof(struct nvkm_gpio_ntfy_rep);
133 notify->types = req->mask;
134 notify->index = req->line;
135 return 0;
136 }
137 return -EINVAL;
138 }
139
140 static const struct nvkm_event_func
141 nvkm_gpio_intr_func = {
142 .ctor = nvkm_gpio_intr_ctor,
143 .init = nvkm_gpio_intr_init,
144 .fini = nvkm_gpio_intr_fini,
145 };
146
147 static void
nvkm_gpio_intr(struct nvkm_subdev * subdev)148 nvkm_gpio_intr(struct nvkm_subdev *subdev)
149 {
150 struct nvkm_gpio *gpio = nvkm_gpio(subdev);
151 u32 hi, lo, i;
152
153 gpio->func->intr_stat(gpio, &hi, &lo);
154
155 for (i = 0; (hi | lo) && i < gpio->func->lines; i++) {
156 struct nvkm_gpio_ntfy_rep rep = {
157 .mask = (NVKM_GPIO_HI * !!(hi & (1 << i))) |
158 (NVKM_GPIO_LO * !!(lo & (1 << i))),
159 };
160 nvkm_event_send(&gpio->event, rep.mask, i, &rep, sizeof(rep));
161 }
162 }
163
164 static int
nvkm_gpio_fini(struct nvkm_subdev * subdev,bool suspend)165 nvkm_gpio_fini(struct nvkm_subdev *subdev, bool suspend)
166 {
167 struct nvkm_gpio *gpio = nvkm_gpio(subdev);
168 u32 mask = (1ULL << gpio->func->lines) - 1;
169
170 gpio->func->intr_mask(gpio, NVKM_GPIO_TOGGLED, mask, 0);
171 gpio->func->intr_stat(gpio, &mask, &mask);
172 return 0;
173 }
174
175 static const struct dmi_system_id gpio_reset_ids[] = {
176 {
177 .ident = "Apple Macbook 10,1",
178 .matches = {
179 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
180 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro10,1"),
181 }
182 },
183 { }
184 };
185
186 static enum dcb_gpio_func_name power_checks[] = {
187 DCB_GPIO_THERM_EXT_POWER_EVENT,
188 DCB_GPIO_POWER_ALERT,
189 DCB_GPIO_EXT_POWER_LOW,
190 };
191
192 static int
nvkm_gpio_init(struct nvkm_subdev * subdev)193 nvkm_gpio_init(struct nvkm_subdev *subdev)
194 {
195 struct nvkm_gpio *gpio = nvkm_gpio(subdev);
196 struct dcb_gpio_func func;
197 int ret;
198 int i;
199
200 if (dmi_check_system(gpio_reset_ids))
201 nvkm_gpio_reset(gpio, DCB_GPIO_UNUSED);
202
203 if (nvkm_boolopt(subdev->device->cfgopt, "NvPowerChecks", true)) {
204 for (i = 0; i < ARRAY_SIZE(power_checks); ++i) {
205 ret = nvkm_gpio_find(gpio, 0, power_checks[i],
206 DCB_GPIO_UNUSED, &func);
207 if (ret)
208 continue;
209
210 ret = nvkm_gpio_get(gpio, 0, func.func, func.line);
211 if (!ret)
212 continue;
213
214 nvkm_error(&gpio->subdev,
215 "GPU is missing power, check its power "
216 "cables. Boot with "
217 "nouveau.config=NvPowerChecks=0 to "
218 "disable.\n");
219 return -EINVAL;
220 }
221 }
222
223 return 0;
224 }
225
226 static void *
nvkm_gpio_dtor(struct nvkm_subdev * subdev)227 nvkm_gpio_dtor(struct nvkm_subdev *subdev)
228 {
229 struct nvkm_gpio *gpio = nvkm_gpio(subdev);
230 nvkm_event_fini(&gpio->event);
231 return gpio;
232 }
233
234 static const struct nvkm_subdev_func
235 nvkm_gpio = {
236 .dtor = nvkm_gpio_dtor,
237 .init = nvkm_gpio_init,
238 .fini = nvkm_gpio_fini,
239 .intr = nvkm_gpio_intr,
240 };
241
242 int
nvkm_gpio_new_(const struct nvkm_gpio_func * func,struct nvkm_device * device,enum nvkm_subdev_type type,int inst,struct nvkm_gpio ** pgpio)243 nvkm_gpio_new_(const struct nvkm_gpio_func *func, struct nvkm_device *device,
244 enum nvkm_subdev_type type, int inst, struct nvkm_gpio **pgpio)
245 {
246 struct nvkm_gpio *gpio;
247
248 if (!(gpio = *pgpio = kzalloc(sizeof(*gpio), GFP_KERNEL)))
249 return -ENOMEM;
250
251 nvkm_subdev_ctor(&nvkm_gpio, device, type, inst, &gpio->subdev);
252 gpio->func = func;
253
254 return nvkm_event_init(&nvkm_gpio_intr_func, 2, func->lines,
255 &gpio->event);
256 }
257