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
 27#include "drmP.h"
 28#include "nouveau_drv.h"
 29#include "nouveau_hw.h"
 30#include "nouveau_gpio.h"
 31
 32int
 33nv10_gpio_sense(struct drm_device *dev, int line)
 34{
 35	if (line < 2) {
 36		line = line * 16;
 37		line = NVReadCRTC(dev, 0, NV_PCRTC_GPIO) >> line;
 38		return !!(line & 0x0100);
 39	} else
 40	if (line < 10) {
 41		line = (line - 2) * 4;
 42		line = NVReadCRTC(dev, 0, NV_PCRTC_GPIO_EXT) >> line;
 43		return !!(line & 0x04);
 44	} else
 45	if (line < 14) {
 46		line = (line - 10) * 4;
 47		line = NVReadCRTC(dev, 0, NV_PCRTC_850) >> line;
 48		return !!(line & 0x04);
 49	}
 50
 51	return -EINVAL;
 52}
 53
 54int
 55nv10_gpio_drive(struct drm_device *dev, int line, int dir, int out)
 56{
 57	u32 reg, mask, data;
 58
 59	if (line < 2) {
 60		line = line * 16;
 61		reg  = NV_PCRTC_GPIO;
 62		mask = 0x00000011;
 63		data = (dir << 4) | out;
 64	} else
 65	if (line < 10) {
 66		line = (line - 2) * 4;
 67		reg  = NV_PCRTC_GPIO_EXT;
 68		mask = 0x00000003;
 69		data = (dir << 1) | out;
 70	} else
 71	if (line < 14) {
 72		line = (line - 10) * 4;
 73		reg  = NV_PCRTC_850;
 74		mask = 0x00000003;
 75		data = (dir << 1) | out;
 76	} else {
 77		return -EINVAL;
 78	}
 79
 80	mask = NVReadCRTC(dev, 0, reg) & ~(mask << line);
 81	NVWriteCRTC(dev, 0, reg, mask | (data << line));
 82	return 0;
 83}
 84
 85void
 86nv10_gpio_irq_enable(struct drm_device *dev, int line, bool on)
 87{
 88	u32 mask = 0x00010001 << line;
 89
 90	nv_wr32(dev, 0x001104, mask);
 91	nv_mask(dev, 0x001144, mask, on ? mask : 0);
 92}
 93
 94static void
 95nv10_gpio_isr(struct drm_device *dev)
 96{
 97	u32 intr = nv_rd32(dev, 0x1104);
 98	u32 hi = (intr & 0x0000ffff) >> 0;
 99	u32 lo = (intr & 0xffff0000) >> 16;
100
101	nouveau_gpio_isr(dev, 0, hi | lo);
102
103	nv_wr32(dev, 0x001104, intr);
104}
105
106int
107nv10_gpio_init(struct drm_device *dev)
108{
109	nv_wr32(dev, 0x001140, 0x00000000);
110	nv_wr32(dev, 0x001100, 0xffffffff);
111	nv_wr32(dev, 0x001144, 0x00000000);
112	nv_wr32(dev, 0x001104, 0xffffffff);
113	nouveau_irq_register(dev, 28, nv10_gpio_isr); /* PBUS */
114	return 0;
115}
116
117void
118nv10_gpio_fini(struct drm_device *dev)
119{
120	nv_wr32(dev, 0x001140, 0x00000000);
121	nv_wr32(dev, 0x001144, 0x00000000);
122	nouveau_irq_unregister(dev, 28);
123}