diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_i2c.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_i2c.c | 133 |
1 files changed, 62 insertions, 71 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_i2c.c b/drivers/gpu/drm/radeon/radeon_i2c.c index f007fcb1191..352110fd68f 100644 --- a/drivers/gpu/drm/radeon/radeon_i2c.c +++ b/drivers/gpu/drm/radeon/radeon_i2c.c @@ -59,6 +59,7 @@ bool radeon_ddc_probe(struct radeon_connector *radeon_connector) return false; } +/* bit banging i2c */ static void radeon_i2c_do_lock(struct radeon_i2c_chan *i2c, int lock_state) { @@ -181,6 +182,24 @@ static void set_data(void *i2c_priv, int data) WREG32(rec->en_data_reg, val); } +static int pre_xfer(struct i2c_adapter *i2c_adap) +{ + struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap); + + radeon_i2c_do_lock(i2c, 1); + + return 0; +} + +static void post_xfer(struct i2c_adapter *i2c_adap) +{ + struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap); + + radeon_i2c_do_lock(i2c, 0); +} + +/* hw i2c */ + static u32 radeon_get_i2c_prescale(struct radeon_device *rdev) { u32 sclk = radeon_get_engine_clock(rdev); @@ -757,26 +776,13 @@ done: return ret; } -static int radeon_sw_i2c_xfer(struct i2c_adapter *i2c_adap, +static int radeon_hw_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); - ret = i2c_transfer(&i2c->algo.radeon.bit_adapter, msgs, num); - radeon_i2c_do_lock(i2c, 0); - - return ret; -} - -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); struct radeon_device *rdev = i2c->dev->dev_private; struct radeon_i2c_bus_rec *rec = &i2c->rec; - int ret; + int ret = 0; switch (rdev->family) { case CHIP_R100: @@ -797,16 +803,12 @@ static int radeon_i2c_xfer(struct i2c_adapter *i2c_adap, case CHIP_RV410: case CHIP_RS400: case CHIP_RS480: - if (rec->hw_capable) - ret = r100_hw_i2c_xfer(i2c_adap, msgs, num); - else - ret = radeon_sw_i2c_xfer(i2c_adap, msgs, num); + ret = r100_hw_i2c_xfer(i2c_adap, msgs, num); break; case CHIP_RS600: case CHIP_RS690: case CHIP_RS740: /* XXX fill in hw i2c implementation */ - ret = radeon_sw_i2c_xfer(i2c_adap, msgs, num); break; case CHIP_RV515: case CHIP_R520: @@ -814,20 +816,16 @@ static int radeon_i2c_xfer(struct i2c_adapter *i2c_adap, case CHIP_RV560: case CHIP_RV570: case CHIP_R580: - if (rec->hw_capable) { - if (rec->mm_i2c) - ret = r100_hw_i2c_xfer(i2c_adap, msgs, num); - else - ret = r500_hw_i2c_xfer(i2c_adap, msgs, num); - } else - ret = radeon_sw_i2c_xfer(i2c_adap, msgs, num); + if (rec->mm_i2c) + ret = r100_hw_i2c_xfer(i2c_adap, msgs, num); + else + ret = r500_hw_i2c_xfer(i2c_adap, msgs, num); break; case CHIP_R600: case CHIP_RV610: case CHIP_RV630: case CHIP_RV670: /* XXX fill in hw i2c implementation */ - ret = radeon_sw_i2c_xfer(i2c_adap, msgs, num); break; case CHIP_RV620: case CHIP_RV635: @@ -838,7 +836,6 @@ static int radeon_i2c_xfer(struct i2c_adapter *i2c_adap, case CHIP_RV710: case CHIP_RV740: /* XXX fill in hw i2c implementation */ - ret = radeon_sw_i2c_xfer(i2c_adap, msgs, num); break; case CHIP_CEDAR: case CHIP_REDWOOD: @@ -846,7 +843,6 @@ static int radeon_i2c_xfer(struct i2c_adapter *i2c_adap, case CHIP_CYPRESS: case CHIP_HEMLOCK: /* XXX fill in hw i2c implementation */ - ret = radeon_sw_i2c_xfer(i2c_adap, msgs, num); break; default: DRM_ERROR("i2c: unhandled radeon chip\n"); @@ -857,20 +853,21 @@ static int radeon_i2c_xfer(struct i2c_adapter *i2c_adap, return ret; } -static u32 radeon_i2c_func(struct i2c_adapter *adap) +static u32 radeon_hw_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, + .master_xfer = radeon_hw_i2c_xfer, + .functionality = radeon_hw_i2c_func, }; struct radeon_i2c_chan *radeon_i2c_create(struct drm_device *dev, struct radeon_i2c_bus_rec *rec, const char *name) { + struct radeon_device *rdev = dev->dev_private; struct radeon_i2c_chan *i2c; int ret; @@ -878,37 +875,41 @@ struct radeon_i2c_chan *radeon_i2c_create(struct drm_device *dev, if (i2c == NULL) return NULL; - /* 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_ERROR("Failed to register internal bit i2c %s\n", name); - goto out_free; - } - /* set the radeon i2c adapter */ - i2c->dev = dev; i2c->rec = *rec; i2c->adapter.owner = THIS_MODULE; + i2c->dev = dev; 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_ERROR("Failed to register i2c %s\n", name); - goto out_free; + if (rec->hw_capable && + ((rdev->family <= CHIP_RS480) || + ((rdev->family >= CHIP_RV515) && (rdev->family <= CHIP_R580)))) { + /* set the radeon hw i2c adapter */ + sprintf(i2c->adapter.name, "Radeon i2c hw bus %s", name); + i2c->adapter.algo = &radeon_i2c_algo; + ret = i2c_add_adapter(&i2c->adapter); + if (ret) { + DRM_ERROR("Failed to register hw i2c %s\n", name); + goto out_free; + } + } else { + /* set the radeon bit adapter */ + sprintf(i2c->adapter.name, "Radeon i2c bit bus %s", name); + i2c->adapter.algo_data = &i2c->algo.bit; + i2c->algo.bit.pre_xfer = pre_xfer; + i2c->algo.bit.post_xfer = post_xfer; + 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.bit.timeout = 2; + i2c->algo.bit.data = i2c; + ret = i2c_bit_add_bus(&i2c->adapter); + if (ret) { + DRM_ERROR("Failed to register bit i2c %s\n", name); + goto out_free; + } } return i2c; @@ -953,16 +954,6 @@ 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); } |