fcec570b27
This enables initialization of external tmds chips on pre-atom and mac systems. Macs are untested. Also, some macs have single link tmds chips while others have dual link tmds chips. We need to figure out which ones have which. This gets external TMDS working on my RS485 and RV380. Signed-off-by: Alex Deucher <alexdeucher@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
270 lines
6.3 KiB
C
270 lines
6.3 KiB
C
/*
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* Copyright 2007-8 Advanced Micro Devices, Inc.
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* Copyright 2008 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: Dave Airlie
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* Alex Deucher
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*/
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#include "drmP.h"
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#include "radeon_drm.h"
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#include "radeon.h"
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/**
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* radeon_ddc_probe
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*
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*/
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bool radeon_ddc_probe(struct radeon_connector *radeon_connector)
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{
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u8 out_buf[] = { 0x0, 0x0};
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u8 buf[2];
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int ret;
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struct i2c_msg msgs[] = {
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{
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.addr = 0x50,
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.flags = 0,
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.len = 1,
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.buf = out_buf,
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},
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{
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.addr = 0x50,
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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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ret = i2c_transfer(&radeon_connector->ddc_bus->adapter, msgs, 2);
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if (ret == 2)
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return true;
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return false;
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}
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void radeon_i2c_do_lock(struct radeon_i2c_chan *i2c, int lock_state)
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{
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struct radeon_device *rdev = i2c->dev->dev_private;
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struct radeon_i2c_bus_rec *rec = &i2c->rec;
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uint32_t temp;
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/* RV410 appears to have a bug where the hw i2c in reset
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* holds the i2c port in a bad state - switch hw i2c away before
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* doing DDC - do this for all r200s/r300s/r400s for safety sake
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*/
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if ((rdev->family >= CHIP_R200) && !ASIC_IS_AVIVO(rdev)) {
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if (rec->a_clk_reg == RADEON_GPIO_MONID) {
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WREG32(RADEON_DVI_I2C_CNTL_0, (RADEON_I2C_SOFT_RST |
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R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1)));
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} else {
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WREG32(RADEON_DVI_I2C_CNTL_0, (RADEON_I2C_SOFT_RST |
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R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3)));
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}
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}
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/* clear the output pin values */
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temp = RREG32(rec->a_clk_reg) & ~rec->a_clk_mask;
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WREG32(rec->a_clk_reg, temp);
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temp = RREG32(rec->a_data_reg) & ~rec->a_data_mask;
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WREG32(rec->a_data_reg, temp);
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/* mask the gpio pins for software use */
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temp = RREG32(rec->mask_clk_reg);
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if (lock_state)
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temp |= rec->mask_clk_mask;
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else
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temp &= ~rec->mask_clk_mask;
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WREG32(rec->mask_clk_reg, temp);
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temp = RREG32(rec->mask_clk_reg);
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temp = RREG32(rec->mask_data_reg);
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if (lock_state)
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temp |= rec->mask_data_mask;
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else
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temp &= ~rec->mask_data_mask;
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WREG32(rec->mask_data_reg, temp);
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temp = RREG32(rec->mask_data_reg);
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}
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static int get_clock(void *i2c_priv)
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{
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struct radeon_i2c_chan *i2c = i2c_priv;
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struct radeon_device *rdev = i2c->dev->dev_private;
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struct radeon_i2c_bus_rec *rec = &i2c->rec;
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uint32_t val;
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/* read the value off the pin */
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val = RREG32(rec->y_clk_reg);
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val &= rec->y_clk_mask;
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return (val != 0);
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}
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static int get_data(void *i2c_priv)
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{
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struct radeon_i2c_chan *i2c = i2c_priv;
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struct radeon_device *rdev = i2c->dev->dev_private;
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struct radeon_i2c_bus_rec *rec = &i2c->rec;
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uint32_t val;
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/* read the value off the pin */
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val = RREG32(rec->y_data_reg);
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val &= rec->y_data_mask;
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return (val != 0);
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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_i2c_chan *i2c = i2c_priv;
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struct radeon_device *rdev = i2c->dev->dev_private;
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struct radeon_i2c_bus_rec *rec = &i2c->rec;
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uint32_t val;
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/* set pin direction */
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val = RREG32(rec->en_clk_reg) & ~rec->en_clk_mask;
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val |= clock ? 0 : rec->en_clk_mask;
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WREG32(rec->en_clk_reg, val);
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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_i2c_chan *i2c = i2c_priv;
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struct radeon_device *rdev = i2c->dev->dev_private;
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struct radeon_i2c_bus_rec *rec = &i2c->rec;
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uint32_t val;
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/* set pin direction */
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val = RREG32(rec->en_data_reg) & ~rec->en_data_mask;
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val |= data ? 0 : rec->en_data_mask;
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WREG32(rec->en_data_reg, val);
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}
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struct radeon_i2c_chan *radeon_i2c_create(struct drm_device *dev,
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struct radeon_i2c_bus_rec *rec,
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const char *name)
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{
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struct radeon_i2c_chan *i2c;
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int ret;
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i2c = kzalloc(sizeof(struct radeon_i2c_chan), GFP_KERNEL);
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if (i2c == NULL)
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return NULL;
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i2c->adapter.owner = THIS_MODULE;
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i2c->adapter.algo_data = &i2c->algo;
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i2c->dev = 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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/* vesa says 2.2 ms is enough, 1 jiffy doesn't seem to always
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* make this, 2 jiffies is a lot more reliable */
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i2c->algo.timeout = 2;
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i2c->algo.data = i2c;
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i2c->rec = *rec;
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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("Failed to register i2c %s\n", name);
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goto out_free;
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}
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return i2c;
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out_free:
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kfree(i2c);
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return NULL;
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}
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void radeon_i2c_destroy(struct radeon_i2c_chan *i2c)
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{
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if (!i2c)
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return;
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i2c_del_adapter(&i2c->adapter);
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kfree(i2c);
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}
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struct drm_encoder *radeon_best_encoder(struct drm_connector *connector)
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{
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return NULL;
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}
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void radeon_i2c_sw_get_byte(struct radeon_i2c_chan *i2c_bus,
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u8 slave_addr,
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u8 addr,
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u8 *val)
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{
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u8 out_buf[2];
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u8 in_buf[2];
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struct i2c_msg msgs[] = {
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{
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.addr = slave_addr,
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.flags = 0,
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.len = 1,
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.buf = out_buf,
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},
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{
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.addr = slave_addr,
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.flags = I2C_M_RD,
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.len = 1,
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.buf = in_buf,
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}
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};
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out_buf[0] = addr;
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out_buf[1] = 0;
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if (i2c_transfer(&i2c_bus->adapter, msgs, 2) == 2) {
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*val = in_buf[0];
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DRM_DEBUG("val = 0x%02x\n", *val);
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} else {
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DRM_ERROR("i2c 0x%02x 0x%02x read failed\n",
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addr, *val);
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}
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}
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void radeon_i2c_sw_put_byte(struct radeon_i2c_chan *i2c_bus,
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u8 slave_addr,
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u8 addr,
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u8 val)
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{
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uint8_t out_buf[2];
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struct i2c_msg msg = {
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.addr = slave_addr,
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.flags = 0,
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.len = 2,
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.buf = out_buf,
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};
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out_buf[0] = addr;
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out_buf[1] = val;
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if (i2c_transfer(&i2c_bus->adapter, &msg, 1) != 1)
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DRM_ERROR("i2c 0x%02x 0x%02x write failed\n",
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addr, val);
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}
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