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https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-25 12:04:46 +08:00
486a45c2a6
Not much point parsing the vbios data into a struct which is only used once to parse the data into another struct, go directly from vbios to nouveau_i2c_chan. Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
446 lines
10 KiB
C
446 lines
10 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 <linux/module.h>
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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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nv_wr32(i2c->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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nv_mask(i2c->dev, i2c->wr, 0x00000006, 4 | (state ? 2 : 0));
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i2c->data = state;
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}
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static int
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nvd0_i2c_getscl(void *data)
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{
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struct nouveau_i2c_chan *i2c = data;
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return !!(nv_rd32(i2c->dev, i2c->rd) & 0x10);
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}
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static int
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nvd0_i2c_getsda(void *data)
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{
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struct nouveau_i2c_chan *i2c = data;
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return !!(nv_rd32(i2c->dev, i2c->rd) & 0x20);
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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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static u8 *
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i2c_table(struct drm_device *dev, u8 *version)
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{
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u8 *dcb = dcb_table(dev), *i2c = NULL;
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if (dcb) {
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if (dcb[0] >= 0x15)
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i2c = ROMPTR(dev, dcb[2]);
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if (dcb[0] >= 0x30)
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i2c = ROMPTR(dev, dcb[4]);
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}
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/* early revisions had no version number, use dcb version */
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if (i2c) {
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*version = dcb[0];
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if (*version >= 0x30)
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*version = i2c[0];
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}
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return i2c;
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}
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int
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nouveau_i2c_init(struct drm_device *dev)
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{
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struct drm_nouveau_private *dev_priv = dev->dev_private;
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struct nvbios *bios = &dev_priv->vbios;
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struct nouveau_i2c_chan *port;
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u8 *i2c, *entry, legacy[2][4] = {};
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u8 version, entries, recordlen;
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int ret, i;
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INIT_LIST_HEAD(&dev_priv->i2c_ports);
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i2c = i2c_table(dev, &version);
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if (!i2c) {
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u8 *bmp = &bios->data[bios->offset];
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if (bios->type != NVBIOS_BMP)
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return -ENODEV;
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legacy[0][0] = NV_CIO_CRE_DDC_WR__INDEX;
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legacy[0][1] = NV_CIO_CRE_DDC_STATUS__INDEX;
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legacy[1][0] = NV_CIO_CRE_DDC0_WR__INDEX;
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legacy[1][1] = NV_CIO_CRE_DDC0_STATUS__INDEX;
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/* BMP (from v4.0) has i2c info in the structure, it's in a
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* fixed location on earlier VBIOS
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*/
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if (bmp[5] < 4)
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i2c = &bios->data[0x48];
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else
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i2c = &bmp[0x36];
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if (i2c[4]) legacy[0][0] = i2c[4];
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if (i2c[5]) legacy[0][1] = i2c[5];
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if (i2c[6]) legacy[1][0] = i2c[6];
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if (i2c[7]) legacy[1][1] = i2c[7];
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}
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if (i2c && version >= 0x30) {
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entry = i2c[1] + i2c;
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entries = i2c[2];
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recordlen = i2c[3];
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} else
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if (i2c) {
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entry = i2c;
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entries = 16;
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recordlen = 4;
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} else {
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entry = legacy[0];
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entries = 2;
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recordlen = 4;
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}
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for (i = 0; i < entries; i++, entry += recordlen) {
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port = kzalloc(sizeof(*port), GFP_KERNEL);
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if (port == NULL) {
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nouveau_i2c_fini(dev);
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return -ENOMEM;
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}
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port->type = entry[3];
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if (version < 0x30) {
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port->type &= 0x07;
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if (port->type == 0x07)
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port->type = 0xff;
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}
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if (port->type == 0xff) {
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kfree(port);
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continue;
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}
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switch (port->type) {
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case 0: /* NV04:NV50 */
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port->wr = entry[0];
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port->rd = entry[1];
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port->bit.setsda = nv04_i2c_setsda;
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port->bit.setscl = nv04_i2c_setscl;
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port->bit.getsda = nv04_i2c_getsda;
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port->bit.getscl = nv04_i2c_getscl;
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break;
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case 4: /* NV4E */
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port->wr = 0x600800 + entry[1];
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port->rd = port->wr;
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port->bit.setsda = nv4e_i2c_setsda;
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port->bit.setscl = nv4e_i2c_setscl;
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port->bit.getsda = nv4e_i2c_getsda;
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port->bit.getscl = nv4e_i2c_getscl;
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break;
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case 5: /* NV50- */
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port->wr = entry[0] & 0x0f;
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if (dev_priv->card_type < NV_D0) {
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if (port->wr >= ARRAY_SIZE(nv50_i2c_port))
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break;
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port->wr = nv50_i2c_port[port->wr];
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port->rd = port->wr;
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port->bit.getsda = nv50_i2c_getsda;
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port->bit.getscl = nv50_i2c_getscl;
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} else {
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port->wr = 0x00d014 + (port->wr * 0x20);
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port->rd = port->wr;
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port->bit.getsda = nvd0_i2c_getsda;
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port->bit.getscl = nvd0_i2c_getscl;
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}
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port->bit.setsda = nv50_i2c_setsda;
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port->bit.setscl = nv50_i2c_setscl;
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break;
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case 6: /* NV50- DP AUX */
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port->wr = entry[0];
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port->rd = port->wr;
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port->adapter.algo = &nouveau_dp_i2c_algo;
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break;
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default:
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break;
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}
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if (!port->adapter.algo && !port->wr) {
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NV_ERROR(dev, "I2C%d: type %d index %x/%x unknown\n",
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i, port->type, port->wr, port->rd);
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kfree(port);
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continue;
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}
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snprintf(port->adapter.name, sizeof(port->adapter.name),
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"nouveau-%s-%d", pci_name(dev->pdev), i);
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port->adapter.owner = THIS_MODULE;
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port->adapter.dev.parent = &dev->pdev->dev;
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port->dev = dev;
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port->index = i;
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port->dcb = ROM32(entry[0]);
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i2c_set_adapdata(&port->adapter, i2c);
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if (port->adapter.algo != &nouveau_dp_i2c_algo) {
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port->adapter.algo_data = &port->bit;
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port->bit.udelay = 40;
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port->bit.timeout = usecs_to_jiffies(5000);
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port->bit.data = port;
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ret = i2c_bit_add_bus(&port->adapter);
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} else {
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port->adapter.algo = &nouveau_dp_i2c_algo;
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ret = i2c_add_adapter(&port->adapter);
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}
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if (ret) {
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NV_ERROR(dev, "I2C%d: failed register: %d\n", i, ret);
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kfree(port);
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continue;
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}
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list_add_tail(&port->head, &dev_priv->i2c_ports);
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}
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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)
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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 *port, *tmp;
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list_for_each_entry_safe(port, tmp, &dev_priv->i2c_ports, head) {
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i2c_del_adapter(&port->adapter);
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kfree(port);
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}
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}
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struct nouveau_i2c_chan *
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nouveau_i2c_find(struct drm_device *dev, u8 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 *port;
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if (index == NV_I2C_DEFAULT(0) ||
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index == NV_I2C_DEFAULT(1)) {
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u8 version, *i2c = i2c_table(dev, &version);
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if (i2c && version >= 0x30) {
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if (index == NV_I2C_DEFAULT(0))
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index = (i2c[4] & 0x0f);
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else
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index = (i2c[4] & 0xf0) >> 4;
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} else {
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index = 2;
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}
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}
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list_for_each_entry(port, &dev_priv->i2c_ports, head) {
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if (port->index == index)
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break;
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}
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if (&port->head == &dev_priv->i2c_ports)
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return NULL;
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if (dev_priv->card_type >= NV_50 && (port->dcb & 0x00000100)) {
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u32 reg = 0x00e500, val;
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if (port->type == 6) {
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reg += port->rd * 0x50;
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val = 0x2002;
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} else {
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reg += ((port->dcb & 0x1e00) >> 9) * 0x50;
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val = 0xe001;
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}
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/* nfi, but neither auxch or i2c work if it's 1 */
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nv_mask(dev, reg + 0x0c, 0x00000001, 0x00000000);
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/* nfi, but switches auxch vs normal i2c */
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nv_mask(dev, reg + 0x00, 0x0000f003, val);
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}
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return port;
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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,
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bool (*match)(struct nouveau_i2c_chan *,
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struct i2c_board_info *),
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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; i2c && info[i].addr; i++) {
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if (nouveau_probe_i2c_addr(i2c, info[i].addr) &&
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(!match || match(i2c, &info[i]))) {
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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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