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path: root/drivers/gpu/drm/radeon/radeon_i2c.c
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Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_i2c.c')
-rw-r--r--drivers/gpu/drm/radeon/radeon_i2c.c182
1 files changed, 141 insertions, 41 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_i2c.c b/drivers/gpu/drm/radeon/radeon_i2c.c
index dd438d32e5c..da3da1e89d0 100644
--- a/drivers/gpu/drm/radeon/radeon_i2c.c
+++ b/drivers/gpu/drm/radeon/radeon_i2c.c
@@ -59,35 +59,43 @@ bool radeon_ddc_probe(struct radeon_connector *radeon_connector)
}
-void radeon_i2c_do_lock(struct radeon_connector *radeon_connector, int lock_state)
+void radeon_i2c_do_lock(struct radeon_i2c_chan *i2c, int lock_state)
{
- struct radeon_device *rdev = radeon_connector->base.dev->dev_private;
+ struct radeon_device *rdev = i2c->dev->dev_private;
+ struct radeon_i2c_bus_rec *rec = &i2c->rec;
uint32_t temp;
- struct radeon_i2c_bus_rec *rec = &radeon_connector->ddc_bus->rec;
/* 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 ((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)));
+ 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)));
+ }
}
}
- if (lock_state) {
- temp = RREG32(rec->a_clk_reg);
- temp &= ~(rec->a_clk_mask);
- WREG32(rec->a_clk_reg, temp);
-
- temp = RREG32(rec->a_data_reg);
- temp &= ~(rec->a_data_mask);
- WREG32(rec->a_data_reg, temp);
- }
+ /* 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;
@@ -112,8 +120,9 @@ static int get_clock(void *i2c_priv)
struct radeon_i2c_bus_rec *rec = &i2c->rec;
uint32_t val;
- val = RREG32(rec->get_clk_reg);
- val &= rec->get_clk_mask;
+ /* read the value off the pin */
+ val = RREG32(rec->y_clk_reg);
+ val &= rec->y_clk_mask;
return (val != 0);
}
@@ -126,8 +135,10 @@ static int get_data(void *i2c_priv)
struct radeon_i2c_bus_rec *rec = &i2c->rec;
uint32_t val;
- val = RREG32(rec->get_data_reg);
- val &= rec->get_data_mask;
+ /* read the value off the pin */
+ val = RREG32(rec->y_data_reg);
+ val &= rec->y_data_mask;
+
return (val != 0);
}
@@ -138,9 +149,10 @@ static void set_clock(void *i2c_priv, int clock)
struct radeon_i2c_bus_rec *rec = &i2c->rec;
uint32_t val;
- val = RREG32(rec->put_clk_reg) & (uint32_t)~(rec->put_clk_mask);
- val |= clock ? 0 : rec->put_clk_mask;
- WREG32(rec->put_clk_reg, 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)
@@ -150,14 +162,15 @@ static void set_data(void *i2c_priv, int data)
struct radeon_i2c_bus_rec *rec = &i2c->rec;
uint32_t val;
- val = RREG32(rec->put_data_reg) & (uint32_t)~(rec->put_data_mask);
- val |= data ? 0 : rec->put_data_mask;
- WREG32(rec->put_data_reg, 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_bus_rec *rec,
+ const char *name)
{
struct radeon_i2c_chan *i2c;
int ret;
@@ -167,20 +180,19 @@ struct radeon_i2c_chan *radeon_i2c_create(struct drm_device *dev,
return NULL;
i2c->adapter.owner = THIS_MODULE;
- i2c->adapter.algo_data = &i2c->algo;
i2c->dev = dev;
- i2c->algo.setsda = set_data;
- i2c->algo.setscl = set_clock;
- i2c->algo.getsda = get_data;
- i2c->algo.getscl = get_clock;
- i2c->algo.udelay = 20;
+ 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.timeout = 2;
- i2c->algo.data = i2c;
+ i2c->algo.bit.timeout = 2;
+ i2c->algo.bit.data = i2c;
i2c->rec = *rec;
- i2c_set_adapdata(&i2c->adapter, i2c);
-
ret = i2c_bit_add_bus(&i2c->adapter);
if (ret) {
DRM_INFO("Failed to register i2c %s\n", name);
@@ -194,6 +206,38 @@ out_free:
}
+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)
@@ -207,3 +251,59 @@ 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);
+}
+
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-22 23:36:37 +0000