nv10.c

  1/*
  2 * Copyright (C) 2009 Francisco Jerez.
  3 * All Rights Reserved.
  4 *
  5 * Permission is hereby granted, free of charge, to any person obtaining
  6 * a copy of this software and associated documentation files (the
  7 * "Software"), to deal in the Software without restriction, including
  8 * without limitation the rights to use, copy, modify, merge, publish,
  9 * distribute, sublicense, and/or sell copies of the Software, and to
 10 * permit persons to whom the Software is furnished to do so, subject to
 11 * the following conditions:
 12 *
 13 * The above copyright notice and this permission notice (including the
 14 * next paragraph) shall be included in all copies or substantial
 15 * portions of the Software.
 16 *
 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 20 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
 21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 24 *
 25 */
 26#include "priv.h"
 27
 28static int
 29nv10_gpio_sense(struct nvkm_gpio *gpio, int line)
 30{
 31	struct nvkm_device *device = gpio->subdev.device;
 32	if (line < 2) {
 33		line = line * 16;
 34		line = nvkm_rd32(device, 0x600818) >> line;
 35		return !!(line & 0x0100);
 36	} else
 37	if (line < 10) {
 38		line = (line - 2) * 4;
 39		line = nvkm_rd32(device, 0x60081c) >> line;
 40		return !!(line & 0x04);
 41	} else
 42	if (line < 14) {
 43		line = (line - 10) * 4;
 44		line = nvkm_rd32(device, 0x600850) >> line;
 45		return !!(line & 0x04);
 46	}
 47
 48	return -EINVAL;
 49}
 50
 51static int
 52nv10_gpio_drive(struct nvkm_gpio *gpio, int line, int dir, int out)
 53{
 54	struct nvkm_device *device = gpio->subdev.device;
 55	u32 reg, mask, data;
 56
 57	if (line < 2) {
 58		line = line * 16;
 59		reg  = 0x600818;
 60		mask = 0x00000011;
 61		data = (dir << 4) | out;
 62	} else
 63	if (line < 10) {
 64		line = (line - 2) * 4;
 65		reg  = 0x60081c;
 66		mask = 0x00000003;
 67		data = (dir << 1) | out;
 68	} else
 69	if (line < 14) {
 70		line = (line - 10) * 4;
 71		reg  = 0x600850;
 72		mask = 0x00000003;
 73		data = (dir << 1) | out;
 74	} else {
 75		return -EINVAL;
 76	}
 77
 78	nvkm_mask(device, reg, mask << line, data << line);
 79	return 0;
 80}
 81
 82static void
 83nv10_gpio_intr_stat(struct nvkm_gpio *gpio, u32 *hi, u32 *lo)
 84{
 85	struct nvkm_device *device = gpio->subdev.device;
 86	u32 intr = nvkm_rd32(device, 0x001104);
 87	u32 stat = nvkm_rd32(device, 0x001144) & intr;
 88	*lo = (stat & 0xffff0000) >> 16;
 89	*hi = (stat & 0x0000ffff);
 90	nvkm_wr32(device, 0x001104, intr);
 91}
 92
 93static void
 94nv10_gpio_intr_mask(struct nvkm_gpio *gpio, u32 type, u32 mask, u32 data)
 95{
 96	struct nvkm_device *device = gpio->subdev.device;
 97	u32 inte = nvkm_rd32(device, 0x001144);
 98	if (type & NVKM_GPIO_LO)
 99		inte = (inte & ~(mask << 16)) | (data << 16);
100	if (type & NVKM_GPIO_HI)
101		inte = (inte & ~mask) | data;
102	nvkm_wr32(device, 0x001144, inte);
103}
104
105static const struct nvkm_gpio_func
106nv10_gpio = {
107	.lines = 16,
108	.intr_stat = nv10_gpio_intr_stat,
109	.intr_mask = nv10_gpio_intr_mask,
110	.drive = nv10_gpio_drive,
111	.sense = nv10_gpio_sense,
112};
113
114int
115nv10_gpio_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
116	      struct nvkm_gpio **pgpio)
117{
118	return nvkm_gpio_new_(&nv10_gpio, device, type, inst, pgpio);
119}