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/*
* Copyright 2007-8 Advanced Micro Devices, Inc.
* Copyright 2008 Red Hat Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: Dave Airlie
* Alex Deucher
*/
#include "drmP.h"
#include "radeon_drm.h"
#include "radeon_drv.h"
void radeon_i2c_do_lock(struct radeon_connector *radeon_connector, int lock_state)
{
struct drm_radeon_private *dev_priv = radeon_connector->base.dev->dev_private;
uint32_t temp;
struct radeon_i2c_bus_rec *rec = &radeon_connector->ddc_bus->rec;
if (lock_state) {
temp = RADEON_READ(rec->a_clk_reg);
temp &= ~(rec->a_clk_mask);
RADEON_WRITE(rec->a_clk_reg, temp);
temp = RADEON_READ(rec->a_data_reg);
temp &= ~(rec->a_data_mask);
RADEON_WRITE(rec->a_data_reg, temp);
}
temp = RADEON_READ(rec->mask_clk_reg);
if (lock_state)
temp |= rec->mask_clk_mask;
else
temp &= ~rec->mask_clk_mask;
RADEON_WRITE(rec->mask_clk_reg, temp);
temp = RADEON_READ(rec->mask_clk_reg);
temp = RADEON_READ(rec->mask_data_reg);
if (lock_state)
temp |= rec->mask_data_mask;
else
temp &= ~rec->mask_data_mask;
RADEON_WRITE(rec->mask_data_reg, temp);
temp = RADEON_READ(rec->mask_data_reg);
}
static int get_clock(void *i2c_priv)
{
struct radeon_i2c_chan *i2c = i2c_priv;
struct drm_radeon_private *dev_priv = i2c->dev->dev_private;
struct radeon_i2c_bus_rec *rec = &i2c->rec;
uint32_t val;
val = RADEON_READ(rec->get_clk_reg);
val &= rec->get_clk_mask;
return (val != 0);
}
static int get_data(void *i2c_priv)
{
struct radeon_i2c_chan *i2c = i2c_priv;
struct drm_radeon_private *dev_priv = i2c->dev->dev_private;
struct radeon_i2c_bus_rec *rec = &i2c->rec;
uint32_t val;
val = RADEON_READ(rec->get_data_reg);
val &= rec->get_data_mask;
return (val != 0);
}
static void set_clock(void *i2c_priv, int clock)
{
struct radeon_i2c_chan *i2c = i2c_priv;
struct drm_radeon_private *dev_priv = i2c->dev->dev_private;
struct radeon_i2c_bus_rec *rec = &i2c->rec;
uint32_t val;
val = RADEON_READ(rec->put_clk_reg) & (uint32_t)~(rec->put_clk_mask);
val |= clock ? 0 : rec->put_clk_mask;
RADEON_WRITE(rec->put_clk_reg, val);
}
static void set_data(void *i2c_priv, int data)
{
struct radeon_i2c_chan *i2c = i2c_priv;
struct drm_radeon_private *dev_priv = i2c->dev->dev_private;
struct radeon_i2c_bus_rec *rec = &i2c->rec;
uint32_t val;
val = RADEON_READ(rec->put_data_reg) & (uint32_t)~(rec->put_data_mask);
val |= data ? 0 : rec->put_data_mask;
RADEON_WRITE(rec->put_data_reg, val);
}
struct radeon_i2c_chan *radeon_i2c_create(struct drm_device *dev,
struct radeon_i2c_bus_rec *rec,
const char *name)
{
struct radeon_i2c_chan *i2c;
int ret;
i2c = drm_calloc(1, sizeof(struct radeon_i2c_chan), DRM_MEM_DRIVER);
if (i2c == NULL)
return NULL;
i2c->adapter.owner = THIS_MODULE;
i2c->adapter.id = I2C_HW_B_RADEON;
i2c->adapter.algo_data = &i2c->algo;
i2c->dev = dev;
i2c->algo.setsda = set_data;
i2c->algo.setscl = set_clock;
i2c->algo.getsda = get_data;
i2c->algo.getscl = get_clock;
i2c->algo.udelay = 20;
i2c->algo.timeout = usecs_to_jiffies(2200);
i2c->algo.data = i2c;
i2c->rec = *rec;
i2c_set_adapdata(&i2c->adapter, i2c);
ret = i2c_bit_add_bus(&i2c->adapter);
if (ret) {
DRM_INFO("Failed to register i2c %s\n", name);
goto out_free;
}
return i2c;
out_free:
drm_free(i2c, sizeof(struct radeon_i2c_chan), DRM_MEM_DRIVER);
return NULL;
}
void radeon_i2c_destroy(struct radeon_i2c_chan *i2c)
{
if (!i2c)
return;
i2c_del_adapter(&i2c->adapter);
drm_free(i2c, sizeof(struct radeon_i2c_chan), DRM_MEM_DRIVER);
}
struct drm_encoder *radeon_best_encoder(struct drm_connector *connector)
{
return NULL;
}
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