/*
* 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.h"
/**
* radeon_ddc_probe
*
*/
bool radeon_ddc_probe(struct radeon_connector *radeon_connector)
{
u8 out_buf[] = { 0x0, 0x0};
u8 buf[2];
int ret;
struct i2c_msg msgs[] = {
{
.addr = 0x50,
.flags = 0,
.len = 1,
.buf = out_buf,
},
{
.addr = 0x50,
.flags = I2C_M_RD,
.len = 1,
.buf = buf,
}
};
ret = i2c_transfer(&radeon_connector->ddc_bus->adapter, msgs, 2);
if (ret == 2)
return true;
return false;
}
void radeon_i2c_do_lock(struct radeon_i2c_chan *i2c, int lock_state)
{
struct radeon_device *rdev = i2c->dev->dev_private;
struct radeon_i2c_bus_rec *rec = &i2c->rec;
uint32_t temp;
/* RV410 appears to have a bug where the hw i2c in reset
* holds the i2c port in a bad state - switch hw i2c away before
* doing DDC - do this for all r200s/r300s/r400s for safety sake
*/
if (rec->hw_capable) {
if ((rdev->family >= CHIP_R200) && !ASIC_IS_AVIVO(rdev)) {
if (rec->a_clk_reg == RADEON_GPIO_MONID) {
WREG32(RADEON_DVI_I2C_CNTL_0, (RADEON_I2C_SOFT_RST |
R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1)));
} else {
WREG32(RADEON_DVI_I2C_CNTL_0, (RADEON_I2C_SOFT_RST |
R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3)));
}
}
}
/* clear the output pin values */
temp = RREG32(rec->a_clk_reg) & ~rec->a_clk_mask;
WREG32(rec->a_clk_reg, temp);
temp = RREG32(rec->a_data_reg) & ~rec->a_data_mask;
WREG32(rec->a_data_reg, temp);
/* set the pins to input */
temp = RREG32(rec->en_clk_reg) & ~rec->en_clk_mask;
WREG32(rec->en_clk_reg, temp);
temp = RREG32(rec->en_data_reg) & ~rec->en_data_mask;
WREG32(rec->en_data_reg, temp);
/* mask the gpio pins for software use */
temp = RREG32(rec->mask_clk_reg);
if (lock_state)
temp |= rec->mask_clk_mask;
else
temp &= ~rec->mask_clk_mask;
WREG32(rec->mask_clk_reg, temp);
temp = RREG32(rec->mask_clk_reg);
temp = RREG32(rec->mask_data_reg);
if (lock_state)
temp |= rec->mask_data_mask;
else
temp &= ~rec->mask_data_mask;
WREG32(rec->mask_data_reg, temp);
temp = RREG32(rec->mask_data_reg);
}
static int get_clock(void *i2c_priv)
{
struct radeon_i2c_chan *i2c = i2c_priv;
struct radeon_device *rdev = i2c->dev->dev_private;
struct radeon_i2c_bus_rec *rec = &i2c->rec;
uint32_t val;
/* read the value off the pin */
val = RREG32(rec->y_clk_reg);
val &= rec->y_clk_mask;
return (val != 0);
}
static int get_data(void *i2c_priv)
{
struct radeon_i2c_chan *i2c = i2c_priv;
struct radeon_device *rdev = i2c->dev->dev_private;
struct radeon_i2c_bus_rec *rec = &i2c->rec;
uint32_t val;
/* read the value off the pin */
val = RREG32(rec->y_data_reg);
val &= rec->y_data_mask;
return (val != 0);
}
static void set_clock(void *i2c_priv, int clock)
{
struct radeon_i2c_chan *i2c = i2c_priv;
struct radeon_device *rdev = i2c->dev->dev_private;
struct radeon_i2c_bus_rec *rec = &i2c->rec;
uint32_t val;
/* set pin direction */
val = RREG32(rec->en_clk_reg) & ~rec->en_clk_mask;
val |= clock ? 0 : rec->en_clk_mask;
WREG32(rec->en_clk_reg, val);
}
static void set_data(void *i2c_priv, int data)
{
struct radeon_i2c_chan *i2c = i2c_priv;
struct radeon_device *rdev = i2c->dev->dev_private;
struct radeon_i2c_bus_rec *rec = &i2c->rec;
uint32_t val;
/* set pin direction */
val = RREG32(rec->en_data_reg) & ~rec->en_data_mask;
val |= data ? 0 : rec->en_data_mask;
WREG32(rec->en_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 = kzalloc(sizeof(struct radeon_i2c_chan), GFP_KERNEL);
if (i2c == NULL)
return NULL;
i2c->adapter.owner = THIS_MODULE;
i2c->dev = dev;
i2c_set_adapdata(&i2c->adapter, i2c);
i2c->adapter.algo_data = &i2c->algo.bit;
i2c->algo.bit.setsda = set_data;
i2c->algo.bit.setscl = set_clock;
i2c->algo.bit.getsda = get_data;
i2c->algo.bit.getscl = get_clock;
i2c->algo.bit.udelay = 20;
/* vesa says 2.2 ms is enough, 1 jiffy doesn't seem to always
* make this, 2 jiffies is a lot more reliable */
i2c->algo.bit.timeout = 2;
i2c->algo.bit.data = i2c;
i2c->rec = *rec;
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:
kfree(i2c);
return NULL;
}
struct radeon_i2c_chan *radeon_i2c_create_dp(struct drm_device *dev,
struct radeon_i2c_bus_rec *rec,
const char *name)
{
struct radeon_i2c_chan *i2c;
int ret;
i2c = kzalloc(sizeof(struct radeon_i2c_chan), GFP_KERNEL);
if (i2c == NULL)
return NULL;
i2c->rec = *rec;
i2c->adapter.owner = THIS_MODULE;
i2c->dev = dev;
i2c_set_adapdata(&i2c->adapter, i2c);
i2c->adapter.algo_data = &i2c->algo.dp;
i2c->algo.dp.aux_ch = radeon_dp_i2c_aux_ch;
i2c->algo.dp.address = 0;
ret = i2c_dp_aux_add_bus(&i2c->adapter);
if (ret) {
DRM_INFO("Failed to register i2c %s\n", name);
goto out_free;
}
return i2c;
out_free:
kfree(i2c);
return NULL;
}
void radeon_i2c_destroy(struct radeon_i2c_chan *i2c)
{
if (!i2c)
return;
i2c_del_adapter(&i2c->adapter);
kfree(i2c);
}
struct drm_encoder *radeon_best_encoder(struct drm_connector *connector)
{
return NULL;
}
void radeon_i2c_sw_get_byte(struct radeon_i2c_chan *i2c_bus,
u8 slave_addr,
u8 addr,
u8 *val)
{
u8 out_buf[2];
u8 in_buf[2];
struct i2c_msg msgs[] = {
{
.addr = slave_addr,
.flags = 0,
.len = 1,
.buf = out_buf,
},
{
.addr = slave_addr,
.flags = I2C_M_RD,
.len = 1,
.buf = in_buf,
}
};
out_buf[0] = addr;
out_buf[1] = 0;
if (i2c_transfer(&i2c_bus->adapter, msgs, 2) == 2) {
*val = in_buf[0];
DRM_DEBUG("val = 0x%02x\n", *val);
} else {
DRM_ERROR("i2c 0x%02x 0x%02x read failed\n",
addr, *val);
}
}
void radeon_i2c_sw_put_byte(struct radeon_i2c_chan *i2c_bus,
u8 slave_addr,
u8 addr,
u8 val)
{
uint8_t out_buf[2];
struct i2c_msg msg = {
.addr = slave_addr,
.flags = 0,
.len = 2,
.buf = out_buf,
};
out_buf[0] = addr;
out_buf[1] = val;
if (i2c_transfer(&i2c_bus->adapter, &msg, 1) != 1)
DRM_ERROR("i2c 0x%02x 0x%02x write failed\n",
addr, val);
}
