337 lines
7.6 KiB
C
337 lines
7.6 KiB
C
/*
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* Copyright 2007 Jérôme Glisse
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* Copyright 2007 Alex Deucher
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* Copyright 2007 Dave Airlie
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation on the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NON-INFRINGEMENT. IN NO EVENT SHALL ATI, VA LINUX SYSTEMS AND/OR
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* THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include "radeon_ms.h"
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static int get_clock(void *data)
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{
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struct radeon_ms_i2c *i2c = data;
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struct drm_radeon_private *dev_priv = i2c->drm_dev->dev_private;
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int v;
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switch (i2c->reg) {
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case VIPPAD_EN:
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v = MMIO_R(VIPPAD_Y);
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if ((REG_G(VIPPAD_Y, VIPPAD_Y_VHAD, v) & 2)) {
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v = 1;
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} else {
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v = 0;
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}
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break;
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case VIPPAD1_EN:
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v = MMIO_R(VIPPAD1_Y);
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if ((REG_G(VIPPAD1_Y, VIPPAD_Y_DVODATA, v) & 8)) {
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v = 1;
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} else {
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v = 0;
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}
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break;
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case GPIO_DDC1:
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v = MMIO_R(GPIO_DDC1);
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if ((GPIO_DDC1__DDC1_CLK_INPUT & v)) {
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v = 1;
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} else {
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v = 0;
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}
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break;
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case GPIO_DDC2:
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v = MMIO_R(GPIO_DDC2);
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if ((GPIO_DDC2__DDC2_CLK_INPUT & v)) {
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v = 1;
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} else {
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v = 0;
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}
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break;
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case GPIO_MONID:
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v = MMIO_R(GPIO_MONID);
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if ((GPIO_MONID__GPIO_MONID_1_INPUT & v)) {
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v = 1;
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} else {
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v = 0;
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}
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break;
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case GPIO_CRT2_DDC:
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v = MMIO_R(GPIO_CRT2_DDC);
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if ((GPIO_CRT2_DDC__CRT2_DDC_CLK_INPUT & v)) {
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v = 1;
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} else {
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v = 0;
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}
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break;
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default:
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v = 0;
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break;
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}
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return v;
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}
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static int get_data(void *data)
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{
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struct radeon_ms_i2c *i2c = data;
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struct drm_radeon_private *dev_priv = i2c->drm_dev->dev_private;
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int v;
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switch (i2c->reg) {
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case VIPPAD_EN:
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v = MMIO_R(VIPPAD_Y);
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if ((REG_G(VIPPAD_Y, VIPPAD_Y_VHAD, v) & 1)) {
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v = 1;
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} else {
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v = 0;
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}
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break;
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case VIPPAD1_EN:
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v = MMIO_R(VIPPAD1_Y);
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if ((REG_G(VIPPAD1_Y, VIPPAD_Y_DVODATA, v) & 4)) {
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v = 1;
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} else {
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v = 0;
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}
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break;
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case GPIO_DDC1:
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v = MMIO_R(GPIO_DDC1);
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if ((GPIO_DDC1__DDC1_DATA_INPUT & v)) {
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v = 1;
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} else {
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v = 0;
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}
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break;
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case GPIO_DDC2:
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v = MMIO_R(GPIO_DDC2);
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if ((GPIO_DDC2__DDC2_DATA_INPUT & v)) {
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v = 1;
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} else {
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v = 0;
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}
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break;
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case GPIO_MONID:
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v = MMIO_R(GPIO_MONID);
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if ((GPIO_MONID__GPIO_MONID_0_INPUT & v)) {
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v = 1;
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} else {
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v = 0;
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}
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break;
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case GPIO_CRT2_DDC:
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v = MMIO_R(GPIO_CRT2_DDC);
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if ((GPIO_CRT2_DDC__CRT2_DDC_DATA_INPUT & v)) {
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v = 1;
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} else {
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v = 0;
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}
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break;
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default:
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v = 0;
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break;
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}
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return v;
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}
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static void set_clock(void *i2c_priv, int clock)
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{
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struct radeon_ms_i2c *i2c = i2c_priv;
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struct drm_radeon_private *dev_priv = i2c->drm_dev->dev_private;
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int v, line;
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v = MMIO_R(i2c->reg);
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switch (i2c->reg) {
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case VIPPAD_EN:
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line = REG_G(VIPPAD_EN, VIPPAD_EN_VHAD, v) & ~2;
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v &= ~VIPPAD_EN__VIPPAD_EN_VHAD__MASK;
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if (!clock) {
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v |= REG_S(VIPPAD_EN, VIPPAD_EN_VHAD, line | 2);
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} else {
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v |= REG_S(VIPPAD_EN, VIPPAD_EN_VHAD, line);
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}
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break;
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case VIPPAD1_EN:
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line = REG_G(VIPPAD1_EN, VIPPAD_EN_DVODATA, v) & ~8;
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v &= ~VIPPAD1_EN__VIPPAD_EN_DVODATA__MASK;
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if (!clock) {
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v |= REG_S(VIPPAD1_EN, VIPPAD_EN_DVODATA, line | 8);
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} else {
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v |= REG_S(VIPPAD1_EN, VIPPAD_EN_DVODATA, line);
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}
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break;
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case GPIO_DDC1:
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v &= ~GPIO_DDC1__DDC1_CLK_OUT_EN;
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if (!clock) {
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v |= GPIO_DDC1__DDC1_CLK_OUT_EN;
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}
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break;
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case GPIO_DDC2:
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v &= ~GPIO_DDC2__DDC2_CLK_OUT_EN;
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if (!clock) {
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v |= GPIO_DDC2__DDC2_CLK_OUT_EN;
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}
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break;
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case GPIO_MONID:
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v &= ~GPIO_MONID__GPIO_MONID_1_OUT_EN;
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if (!clock) {
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v |= GPIO_MONID__GPIO_MONID_1_OUT_EN;
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}
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break;
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case GPIO_CRT2_DDC:
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v &= ~GPIO_CRT2_DDC__CRT2_DDC_CLK_OUT_EN;
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if (!clock) {
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v |= GPIO_CRT2_DDC__CRT2_DDC_CLK_OUT_EN;
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}
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break;
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default:
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return;
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}
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MMIO_W(i2c->reg, v);
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}
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static void set_data(void *i2c_priv, int data)
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{
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struct radeon_ms_i2c *i2c = i2c_priv;
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struct drm_radeon_private *dev_priv = i2c->drm_dev->dev_private;
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int v, line;
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v = MMIO_R(i2c->reg);
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switch (i2c->reg) {
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case VIPPAD_EN:
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line = REG_G(VIPPAD_EN, VIPPAD_EN_VHAD, v) & ~1;
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v &= ~VIPPAD_EN__VIPPAD_EN_VHAD__MASK;
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if (!data) {
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v |= REG_S(VIPPAD_EN, VIPPAD_EN_VHAD, line | 1);
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} else {
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v |= REG_S(VIPPAD_EN, VIPPAD_EN_VHAD, line);
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}
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break;
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case VIPPAD1_EN:
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line = REG_G(VIPPAD1_EN, VIPPAD_EN_DVODATA, v) & ~4;
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v &= ~VIPPAD1_EN__VIPPAD_EN_DVODATA__MASK;
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if (!data) {
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v |= REG_S(VIPPAD1_EN, VIPPAD_EN_DVODATA, line | 4);
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} else {
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v |= REG_S(VIPPAD1_EN, VIPPAD_EN_DVODATA, line);
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}
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break;
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case GPIO_DDC1:
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v &= ~GPIO_DDC1__DDC1_DATA_OUT_EN;
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if (!data) {
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v |= GPIO_DDC1__DDC1_DATA_OUT_EN;
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}
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break;
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case GPIO_DDC2:
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v &= ~GPIO_DDC2__DDC2_DATA_OUT_EN;
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if (!data) {
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v |= GPIO_DDC2__DDC2_DATA_OUT_EN;
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}
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break;
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case GPIO_MONID:
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v &= ~GPIO_MONID__GPIO_MONID_0_OUT_EN;
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if (!data) {
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v |= GPIO_MONID__GPIO_MONID_0_OUT_EN;
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}
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break;
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case GPIO_CRT2_DDC:
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v &= ~GPIO_CRT2_DDC__CRT2_DDC_DATA_OUT_EN;
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if (!data) {
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v |= GPIO_CRT2_DDC__CRT2_DDC_DATA_OUT_EN;
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}
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break;
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default:
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return;
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}
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MMIO_W(i2c->reg, v);
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}
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/**
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* radeon_ms_i2c_create - instantiate an radeon i2c bus on specified GPIO reg
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* @dev: DRM device
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* @output: driver specific output device
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* @reg: GPIO reg to use
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* @name: name for this bus
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*
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* Creates and registers a new i2c bus with the Linux i2c layer, for use
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* in output probing and control (e.g. DDC or SDVO control functions).
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*
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*/
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struct radeon_ms_i2c *radeon_ms_i2c_create(struct drm_device *dev,
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const uint32_t reg,
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const char *name)
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{
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struct radeon_ms_i2c *i2c;
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int ret;
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i2c = drm_alloc(sizeof(struct radeon_ms_i2c), DRM_MEM_DRIVER);
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if (i2c == NULL) {
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return NULL;
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}
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memset(i2c, 0, sizeof(struct radeon_ms_i2c));
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i2c->drm_dev = dev;
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i2c->reg = reg;
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snprintf(i2c->adapter.name, I2C_NAME_SIZE, "radeon-%s", name);
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i2c->adapter.owner = THIS_MODULE;
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/* fixme need to take a look at what its needed for */
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i2c->adapter.id = I2C_HW_B_RADEON;
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i2c->adapter.algo_data = &i2c->algo;
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i2c->adapter.dev.parent = &dev->pdev->dev;
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i2c->algo.setsda = set_data;
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i2c->algo.setscl = set_clock;
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i2c->algo.getsda = get_data;
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i2c->algo.getscl = get_clock;
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i2c->algo.udelay = 20;
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i2c->algo.timeout = usecs_to_jiffies(2200);
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i2c->algo.data = i2c;
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i2c_set_adapdata(&i2c->adapter, i2c);
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ret = i2c_bit_add_bus(&i2c->adapter);
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if(ret) {
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DRM_INFO("[radeon_ms] failed to register I2C '%s' bus (0x%X)\n",
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i2c->adapter.name, reg);
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goto out_free;
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}
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DRM_INFO("[radeon_ms] registered I2C '%s' bus (0x%X)\n",
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i2c->adapter.name, reg);
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return i2c;
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out_free:
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drm_free(i2c, sizeof(struct radeon_ms_i2c), DRM_MEM_DRIVER);
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return NULL;
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}
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/**
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* radeon_ms_i2c_destroy - unregister and free i2c bus resources
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* @output: channel to free
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*
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* Unregister the adapter from the i2c layer, then free the structure.
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*/
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void radeon_ms_i2c_destroy(struct radeon_ms_i2c *i2c)
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{
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if (i2c == NULL) {
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return;
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}
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i2c_del_adapter(&i2c->adapter);
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drm_free(i2c, sizeof(struct radeon_ms_i2c), DRM_MEM_DRIVER);
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}
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