forked from Minki/linux
5a6f98f5bf
Currently just a wrapper around bit algo Signed-off-by: Alex Deucher <alexdeucher@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
357 lines
8.6 KiB
C
357 lines
8.6 KiB
C
/*
|
|
* 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;
|
|
}
|
|
|
|
|
|
static 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);
|
|
}
|
|
|
|
static int radeon_i2c_xfer(struct i2c_adapter *i2c_adap,
|
|
struct i2c_msg *msgs, int num)
|
|
{
|
|
struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap);
|
|
int ret;
|
|
|
|
radeon_i2c_do_lock(i2c, 1);
|
|
if (i2c_transfer(&i2c->algo.radeon.bit_adapter, msgs, num) == num)
|
|
ret = num;
|
|
else
|
|
ret = -1;
|
|
radeon_i2c_do_lock(i2c, 0);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static u32 radeon_i2c_func(struct i2c_adapter *adap)
|
|
{
|
|
return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
|
|
}
|
|
|
|
static const struct i2c_algorithm radeon_i2c_algo = {
|
|
.master_xfer = radeon_i2c_xfer,
|
|
.functionality = radeon_i2c_func,
|
|
};
|
|
|
|
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->dev = dev;
|
|
i2c->rec = *rec;
|
|
/* set the internal bit adapter */
|
|
i2c->algo.radeon.bit_adapter.owner = THIS_MODULE;
|
|
i2c_set_adapdata(&i2c->algo.radeon.bit_adapter, i2c);
|
|
sprintf(i2c->algo.radeon.bit_adapter.name, "Radeon internal i2c bit bus %s", name);
|
|
i2c->algo.radeon.bit_adapter.algo_data = &i2c->algo.radeon.bit_data;
|
|
i2c->algo.radeon.bit_data.setsda = set_data;
|
|
i2c->algo.radeon.bit_data.setscl = set_clock;
|
|
i2c->algo.radeon.bit_data.getsda = get_data;
|
|
i2c->algo.radeon.bit_data.getscl = get_clock;
|
|
i2c->algo.radeon.bit_data.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.radeon.bit_data.timeout = 2;
|
|
i2c->algo.radeon.bit_data.data = i2c;
|
|
ret = i2c_bit_add_bus(&i2c->algo.radeon.bit_adapter);
|
|
if (ret) {
|
|
DRM_INFO("Failed to register internal bit i2c %s\n", name);
|
|
goto out_free;
|
|
}
|
|
/* set the radeon i2c adapter */
|
|
i2c->adapter.owner = THIS_MODULE;
|
|
i2c_set_adapdata(&i2c->adapter, i2c);
|
|
sprintf(i2c->adapter.name, "Radeon i2c %s", name);
|
|
i2c->adapter.algo_data = &i2c->algo.radeon;
|
|
i2c->adapter.algo = &radeon_i2c_algo;
|
|
ret = i2c_add_adapter(&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->algo.radeon.bit_adapter);
|
|
i2c_del_adapter(&i2c->adapter);
|
|
kfree(i2c);
|
|
}
|
|
|
|
void radeon_i2c_destroy_dp(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_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_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);
|
|
}
|
|
|