2 * Copyright 2010 Red Hat Inc.
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5 * copy of this software and associated documentation files (the "Software"),
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9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
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15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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26 #include "nouveau_drv.h"
27 #include "nouveau_hw.h"
30 nv50_gpio_location(struct dcb_gpio_entry *gpio, uint32_t *reg, uint32_t *shift)
32 const uint32_t nv50_gpio_reg[4] = { 0xe104, 0xe108, 0xe280, 0xe284 };
37 *reg = nv50_gpio_reg[gpio->line >> 3];
38 *shift = (gpio->line & 7) << 2;
43 nv50_gpio_get(struct drm_device *dev, enum dcb_gpio_tag tag)
45 struct dcb_gpio_entry *gpio;
48 gpio = nouveau_bios_gpio_entry(dev, tag);
52 if (nv50_gpio_location(gpio, &r, &s))
55 v = nv_rd32(dev, r) >> (s + 2);
56 return ((v & 1) == (gpio->state[1] & 1));
60 nv50_gpio_set(struct drm_device *dev, enum dcb_gpio_tag tag, int state)
62 struct dcb_gpio_entry *gpio;
65 gpio = nouveau_bios_gpio_entry(dev, tag);
69 if (nv50_gpio_location(gpio, &r, &s))
72 v = nv_rd32(dev, r) & ~(0x3 << s);
73 v |= (gpio->state[state] ^ 2) << s;
79 nv50_gpio_irq_enable(struct drm_device *dev, enum dcb_gpio_tag tag, bool on)
81 struct dcb_gpio_entry *gpio;
84 gpio = nouveau_bios_gpio_entry(dev, tag);
86 NV_ERROR(dev, "gpio tag 0x%02x not found\n", tag);
90 reg = gpio->line < 16 ? 0xe050 : 0xe070;
91 mask = 0x00010001 << (gpio->line & 0xf);
93 nv_wr32(dev, reg + 4, mask);
94 nv_mask(dev, reg + 0, mask, on ? mask : 0);
98 nv50_gpio_init(struct drm_device *dev)
100 struct drm_nouveau_private *dev_priv = dev->dev_private;
102 /* disable, and ack any pending gpio interrupts */
103 nv_wr32(dev, 0xe050, 0x00000000);
104 nv_wr32(dev, 0xe054, 0xffffffff);
105 if (dev_priv->chipset >= 0x90) {
106 nv_wr32(dev, 0xe070, 0x00000000);
107 nv_wr32(dev, 0xe074, 0xffffffff);