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drm/radeon/kms: add radeon i2c algo

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Currently just a wrapper around bit algo

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Alex Deucher
2009-12-22 15:04:48 -05:00
committed by Dave Airlie
parent 5ff5571767
commit 5a6f98f5bf
5 changed files with 102 additions and 72 deletions
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91
drivers/gpu/drm/radeon/radeon_i2c.c
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@@ -59,7 +59,7 @@ bool radeon_ddc_probe(struct radeon_connector *radeon_connector)
}
void radeon_i2c_do_lock(struct radeon_i2c_chan *i2c, int lock_state)
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;
@@ -168,6 +168,32 @@ static void set_data(void *i2c_priv, int data)
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)
@@ -179,21 +205,34 @@ struct radeon_i2c_chan *radeon_i2c_create(struct drm_device *dev,
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;
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.bit.timeout = 2;
i2c->algo.bit.data = i2c;
i2c->rec = *rec;
ret = i2c_bit_add_bus(&i2c->adapter);
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;
@@ -237,8 +276,16 @@ out_free:
}
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;
@@ -252,10 +299,10 @@ 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)
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];
@@ -286,10 +333,10 @@ void radeon_i2c_sw_get_byte(struct radeon_i2c_chan *i2c_bus,
}
}
void radeon_i2c_sw_put_byte(struct radeon_i2c_chan *i2c_bus,
u8 slave_addr,
u8 addr,
u8 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 = {