drivers/gpu/drm/nouveau/nv50_gpio.c

   1 /*
   2  * Copyright 2010 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
  25 #include <linux/dmi.h>
  26 #include <drm/drmP.h>
  27 #include "nouveau_drv.h"
  28 #include "nouveau_hw.h"
  29 #include "nouveau_gpio.h"
  30
  31 #include "nv50_display.h"
  32
  33 static int
  34 nv50_gpio_location(int line, u32 *reg, u32 *shift)
  35 {
  36         const uint32_t nv50_gpio_reg[4] = { 0xe104, 0xe108, 0xe280, 0xe284 };
  37
  38         if (line >= 32)
  39                 return -EINVAL;
  40
  41         *reg = nv50_gpio_reg[line >> 3];
  42         *shift = (line & 7) << 2;
  43         return 0;
  44 }
  45
  46 int
  47 nv50_gpio_drive(struct drm_device *dev, int line, int dir, int out)
  48 {
  49         u32 reg, shift;
  50
  51         if (nv50_gpio_location(line, &reg, &shift))
  52                 return -EINVAL;
  53
  54         nv_mask(dev, reg, 7 << shift, (((dir ^ 1) << 1) | out) << shift);
  55         return 0;
  56 }
  57
  58 int
  59 nv50_gpio_sense(struct drm_device *dev, int line)
  60 {
  61         u32 reg, shift;
  62
  63         if (nv50_gpio_location(line, &reg, &shift))
  64                 return -EINVAL;
  65
  66         return !!(nv_rd32(dev, reg) & (4 << shift));
  67 }
  68
  69 void
  70 nv50_gpio_irq_enable(struct drm_device *dev, int line, bool on)
  71 {
  72         u32 reg  = line < 16 ? 0xe050 : 0xe070;
  73         u32 mask = 0x00010001 << (line & 0xf);
  74
  75         nv_wr32(dev, reg + 4, mask);
  76         nv_mask(dev, reg + 0, mask, on ? mask : 0);
  77 }
  78
  79 int
  80 nvd0_gpio_drive(struct drm_device *dev, int line, int dir, int out)
  81 {
  82         u32 data = ((dir ^ 1) << 13) | (out << 12);
  83         nv_mask(dev, 0x00d610 + (line * 4), 0x00003000, data);
  84         nv_mask(dev, 0x00d604, 0x00000001, 0x00000001); /* update? */
  85         return 0;
  86 }
  87
  88 int
  89 nvd0_gpio_sense(struct drm_device *dev, int line)
  90 {
  91         return !!(nv_rd32(dev, 0x00d610 + (line * 4)) & 0x00004000);
  92 }
  93
  94 static void
  95 nv50_gpio_isr(struct drm_device *dev)
  96 {
  97         struct drm_nouveau_private *dev_priv = dev->dev_private;
  98         u32 intr0, intr1 = 0;
  99         u32 hi, lo;
 100
 101         intr0 = nv_rd32(dev, 0xe054) & nv_rd32(dev, 0xe050);
 102         if (dev_priv->chipset >= 0x90)
 103                 intr1 = nv_rd32(dev, 0xe074) & nv_rd32(dev, 0xe070);
 104
 105         hi = (intr0 & 0x0000ffff) | (intr1 << 16);
 106         lo = (intr0 >> 16) | (intr1 & 0xffff0000);
 107         nouveau_gpio_isr(dev, 0, hi | lo);
 108
 109         nv_wr32(dev, 0xe054, intr0);
 110         if (dev_priv->chipset >= 0x90)
 111                 nv_wr32(dev, 0xe074, intr1);
 112 }
 113
 114 static struct dmi_system_id gpio_reset_ids[] = {
 115         {
 116                 .ident = "Apple Macbook 10,1",
 117                 .matches = {
 118                         DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
 119                         DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro10,1"),
 120                 }
 121         },
 122         { }
 123 };
 124
 125 int
 126 nv50_gpio_init(struct drm_device *dev)
 127 {
 128         struct drm_nouveau_private *dev_priv = dev->dev_private;
 129
 130         /* initialise gpios and routing to vbios defaults */
 131         if (dmi_check_system(gpio_reset_ids))
 132                 nouveau_gpio_reset(dev);
 133
 134         /* disable, and ack any pending gpio interrupts */
 135         nv_wr32(dev, 0xe050, 0x00000000);
 136         nv_wr32(dev, 0xe054, 0xffffffff);
 137         if (dev_priv->chipset >= 0x90) {
 138                 nv_wr32(dev, 0xe070, 0x00000000);
 139                 nv_wr32(dev, 0xe074, 0xffffffff);
 140         }
 141
 142         nouveau_irq_register(dev, 21, nv50_gpio_isr);
 143         return 0;
 144 }
 145
 146 void
 147 nv50_gpio_fini(struct drm_device *dev)
 148 {
 149         struct drm_nouveau_private *dev_priv = dev->dev_private;
 150
 151         nv_wr32(dev, 0xe050, 0x00000000);
 152         if (dev_priv->chipset >= 0x90)
 153                 nv_wr32(dev, 0xe070, 0x00000000);
 154         nouveau_irq_unregister(dev, 21);
 155 }