drm/radeon/kms: add radeon i2c algo
Currently just a wrapper around bit algo
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/radeon_i2c.c b/drivers/gpu/drm/radeon/radeon_i2c.c
index da3da1e..75b090f 100644
--- a/drivers/gpu/drm/radeon/radeon_i2c.c
+++ b/drivers/gpu/drm/radeon/radeon_i2c.c
@@ -59,7 +59,7 @@
}
-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 @@
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 @@
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;
@@ -237,11 +276,19 @@
}
-
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);
@@ -252,10 +299,10 @@
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_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 = {