diff options
Diffstat (limited to 'linux-core/nv50_i2c.c')
| -rw-r--r-- | linux-core/nv50_i2c.c | 48 |
1 files changed, 46 insertions, 2 deletions
diff --git a/linux-core/nv50_i2c.c b/linux-core/nv50_i2c.c index cf55645b..e90a4cee 100644 --- a/linux-core/nv50_i2c.c +++ b/linux-core/nv50_i2c.c @@ -28,18 +28,62 @@ #include "nv50_i2c.h" +static uint32_t nv50_i2c_port(int index) +{ + uint32_t port = 0; + + switch (index) { + case 0: + port = NV50_PCONNECTOR_I2C_PORT_0; + break; + case 1: + port = NV50_PCONNECTOR_I2C_PORT_1; + break; + case 2: + port = NV50_PCONNECTOR_I2C_PORT_2; + break; + case 3: + port = NV50_PCONNECTOR_I2C_PORT_3; + break; + case 4: + port = NV50_PCONNECTOR_I2C_PORT_4; + break; + case 5: + port = NV50_PCONNECTOR_I2C_PORT_5; + break; + default: + break; + } + + if (!port) { + DRM_ERROR("Invalid i2c port, returning 0.\n"); + BUG(); + } + + return port; +} + static void nv50_i2c_set_bits(struct nv50_i2c_channel *chan, int clock_high, int data_high) { struct drm_nouveau_private *dev_priv = chan->dev->dev_private; + uint32_t port = nv50_i2c_port(chan->index); - NV_WRITE(NV50_PCONNECTOR_I2C_PORT(chan->index), 4 | (data_high << 1) | clock_high); + if (!port) + return; + + NV_WRITE(port, 4 | (data_high << 1) | clock_high); } static void nv50_i2c_get_bits(struct nv50_i2c_channel *chan, int *clock_high, int *data_high) { struct drm_nouveau_private *dev_priv = chan->dev->dev_private; + uint32_t port = nv50_i2c_port(chan->index); + uint32_t val; + + if (!port) + return; - uint32_t val = NV_READ(NV50_PCONNECTOR_I2C_PORT(chan->index)); + val = NV_READ(port); if (val & 1) *clock_high = 1; |