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c020c9a8ca
This makes it easier to see how this is working, and lets us transfer the EDID in blocks of 16 bytes. The primary reason for this change is because debug logs are rather hard to read with the hundreds of single-byte auxch transactions that occur. Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
320 lines
7.3 KiB
C
320 lines
7.3 KiB
C
/*
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* Copyright 2009 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Ben Skeggs
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*/
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#include "drmP.h"
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#include "nouveau_drv.h"
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#include "nouveau_i2c.h"
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#include "nouveau_hw.h"
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static void
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nv04_i2c_setscl(void *data, int state)
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{
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struct nouveau_i2c_chan *i2c = data;
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struct drm_device *dev = i2c->dev;
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uint8_t val;
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val = (NVReadVgaCrtc(dev, 0, i2c->wr) & 0xd0) | (state ? 0x20 : 0);
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NVWriteVgaCrtc(dev, 0, i2c->wr, val | 0x01);
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}
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static void
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nv04_i2c_setsda(void *data, int state)
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{
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struct nouveau_i2c_chan *i2c = data;
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struct drm_device *dev = i2c->dev;
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uint8_t val;
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val = (NVReadVgaCrtc(dev, 0, i2c->wr) & 0xe0) | (state ? 0x10 : 0);
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NVWriteVgaCrtc(dev, 0, i2c->wr, val | 0x01);
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}
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static int
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nv04_i2c_getscl(void *data)
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{
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struct nouveau_i2c_chan *i2c = data;
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struct drm_device *dev = i2c->dev;
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return !!(NVReadVgaCrtc(dev, 0, i2c->rd) & 4);
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}
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static int
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nv04_i2c_getsda(void *data)
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{
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struct nouveau_i2c_chan *i2c = data;
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struct drm_device *dev = i2c->dev;
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return !!(NVReadVgaCrtc(dev, 0, i2c->rd) & 8);
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}
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static void
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nv4e_i2c_setscl(void *data, int state)
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{
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struct nouveau_i2c_chan *i2c = data;
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struct drm_device *dev = i2c->dev;
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uint8_t val;
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val = (nv_rd32(dev, i2c->wr) & 0xd0) | (state ? 0x20 : 0);
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nv_wr32(dev, i2c->wr, val | 0x01);
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}
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static void
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nv4e_i2c_setsda(void *data, int state)
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{
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struct nouveau_i2c_chan *i2c = data;
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struct drm_device *dev = i2c->dev;
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uint8_t val;
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val = (nv_rd32(dev, i2c->wr) & 0xe0) | (state ? 0x10 : 0);
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nv_wr32(dev, i2c->wr, val | 0x01);
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}
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static int
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nv4e_i2c_getscl(void *data)
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{
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struct nouveau_i2c_chan *i2c = data;
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struct drm_device *dev = i2c->dev;
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return !!((nv_rd32(dev, i2c->rd) >> 16) & 4);
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}
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static int
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nv4e_i2c_getsda(void *data)
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{
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struct nouveau_i2c_chan *i2c = data;
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struct drm_device *dev = i2c->dev;
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return !!((nv_rd32(dev, i2c->rd) >> 16) & 8);
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}
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static int
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nv50_i2c_getscl(void *data)
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{
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struct nouveau_i2c_chan *i2c = data;
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struct drm_device *dev = i2c->dev;
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return !!(nv_rd32(dev, i2c->rd) & 1);
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}
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static int
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nv50_i2c_getsda(void *data)
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{
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struct nouveau_i2c_chan *i2c = data;
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struct drm_device *dev = i2c->dev;
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return !!(nv_rd32(dev, i2c->rd) & 2);
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}
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static void
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nv50_i2c_setscl(void *data, int state)
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{
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struct nouveau_i2c_chan *i2c = data;
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struct drm_device *dev = i2c->dev;
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nv_wr32(dev, i2c->wr, 4 | (i2c->data ? 2 : 0) | (state ? 1 : 0));
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}
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static void
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nv50_i2c_setsda(void *data, int state)
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{
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struct nouveau_i2c_chan *i2c = data;
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struct drm_device *dev = i2c->dev;
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nv_wr32(dev, i2c->wr,
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(nv_rd32(dev, i2c->rd) & 1) | 4 | (state ? 2 : 0));
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i2c->data = state;
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}
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static const uint32_t nv50_i2c_port[] = {
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0x00e138, 0x00e150, 0x00e168, 0x00e180,
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0x00e254, 0x00e274, 0x00e764, 0x00e780,
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0x00e79c, 0x00e7b8
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};
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#define NV50_I2C_PORTS ARRAY_SIZE(nv50_i2c_port)
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int
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nouveau_i2c_init(struct drm_device *dev, struct dcb_i2c_entry *entry, int index)
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{
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struct drm_nouveau_private *dev_priv = dev->dev_private;
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struct nouveau_i2c_chan *i2c;
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int ret;
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if (entry->chan)
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return -EEXIST;
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if (dev_priv->card_type == NV_50 && entry->read >= NV50_I2C_PORTS) {
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NV_ERROR(dev, "unknown i2c port %d\n", entry->read);
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return -EINVAL;
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}
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i2c = kzalloc(sizeof(*i2c), GFP_KERNEL);
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if (i2c == NULL)
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return -ENOMEM;
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switch (entry->port_type) {
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case 0:
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i2c->bit.setsda = nv04_i2c_setsda;
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i2c->bit.setscl = nv04_i2c_setscl;
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i2c->bit.getsda = nv04_i2c_getsda;
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i2c->bit.getscl = nv04_i2c_getscl;
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i2c->rd = entry->read;
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i2c->wr = entry->write;
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break;
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case 4:
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i2c->bit.setsda = nv4e_i2c_setsda;
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i2c->bit.setscl = nv4e_i2c_setscl;
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i2c->bit.getsda = nv4e_i2c_getsda;
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i2c->bit.getscl = nv4e_i2c_getscl;
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i2c->rd = 0x600800 + entry->read;
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i2c->wr = 0x600800 + entry->write;
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break;
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case 5:
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i2c->bit.setsda = nv50_i2c_setsda;
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i2c->bit.setscl = nv50_i2c_setscl;
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i2c->bit.getsda = nv50_i2c_getsda;
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i2c->bit.getscl = nv50_i2c_getscl;
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i2c->rd = nv50_i2c_port[entry->read];
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i2c->wr = i2c->rd;
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break;
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case 6:
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i2c->rd = entry->read;
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i2c->wr = entry->write;
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break;
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default:
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NV_ERROR(dev, "DCB I2C port type %d unknown\n",
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entry->port_type);
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kfree(i2c);
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return -EINVAL;
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}
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snprintf(i2c->adapter.name, sizeof(i2c->adapter.name),
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"nouveau-%s-%d", pci_name(dev->pdev), index);
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i2c->adapter.owner = THIS_MODULE;
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i2c->adapter.dev.parent = &dev->pdev->dev;
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i2c->dev = dev;
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i2c_set_adapdata(&i2c->adapter, i2c);
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if (entry->port_type < 6) {
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i2c->adapter.algo_data = &i2c->bit;
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i2c->bit.udelay = 40;
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i2c->bit.timeout = usecs_to_jiffies(5000);
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i2c->bit.data = i2c;
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ret = i2c_bit_add_bus(&i2c->adapter);
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} else {
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i2c->adapter.algo = &nouveau_dp_i2c_algo;
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ret = i2c_add_adapter(&i2c->adapter);
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}
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if (ret) {
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NV_ERROR(dev, "Failed to register i2c %d\n", index);
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kfree(i2c);
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return ret;
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}
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entry->chan = i2c;
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return 0;
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}
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void
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nouveau_i2c_fini(struct drm_device *dev, struct dcb_i2c_entry *entry)
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{
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if (!entry->chan)
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return;
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i2c_del_adapter(&entry->chan->adapter);
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kfree(entry->chan);
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entry->chan = NULL;
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}
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struct nouveau_i2c_chan *
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nouveau_i2c_find(struct drm_device *dev, int index)
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{
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struct drm_nouveau_private *dev_priv = dev->dev_private;
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struct dcb_i2c_entry *i2c = &dev_priv->vbios.dcb.i2c[index];
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if (index >= DCB_MAX_NUM_I2C_ENTRIES)
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return NULL;
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if (dev_priv->chipset >= NV_50 && (i2c->entry & 0x00000100)) {
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uint32_t reg = 0xe500, val;
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if (i2c->port_type == 6) {
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reg += i2c->read * 0x50;
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val = 0x2002;
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} else {
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reg += ((i2c->entry & 0x1e00) >> 9) * 0x50;
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val = 0xe001;
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}
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nv_wr32(dev, reg, (nv_rd32(dev, reg) & ~0xf003) | val);
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}
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if (!i2c->chan && nouveau_i2c_init(dev, i2c, index))
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return NULL;
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return i2c->chan;
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}
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bool
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nouveau_probe_i2c_addr(struct nouveau_i2c_chan *i2c, int addr)
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{
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uint8_t buf[] = { 0 };
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struct i2c_msg msgs[] = {
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{
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.addr = addr,
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.flags = 0,
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.len = 1,
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.buf = buf,
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},
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{
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.addr = addr,
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.flags = I2C_M_RD,
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.len = 1,
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.buf = buf,
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}
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};
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return i2c_transfer(&i2c->adapter, msgs, 2) == 2;
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}
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int
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nouveau_i2c_identify(struct drm_device *dev, const char *what,
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struct i2c_board_info *info, int index)
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{
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struct nouveau_i2c_chan *i2c = nouveau_i2c_find(dev, index);
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int i;
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NV_DEBUG(dev, "Probing %ss on I2C bus: %d\n", what, index);
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for (i = 0; info[i].addr; i++) {
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if (nouveau_probe_i2c_addr(i2c, info[i].addr)) {
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NV_INFO(dev, "Detected %s: %s\n", what, info[i].type);
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return i;
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}
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}
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NV_DEBUG(dev, "No devices found.\n");
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return -ENODEV;
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}
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