| 0,0 → 1,209 |
|---|
| /* |
| * Copyright 2007-8 Advanced Micro Devices, Inc. |
| * Copyright 2008 Red Hat Inc. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| * |
| * Authors: Dave Airlie |
| * Alex Deucher |
| */ |
| #include "drmP.h" |
| #include "radeon_drm.h" |
| #include "radeon.h" |
| |
| /** |
| * radeon_ddc_probe |
| * |
| */ |
| bool radeon_ddc_probe(struct radeon_connector *radeon_connector) |
| { |
| u8 out_buf[] = { 0x0, 0x0}; |
| u8 buf[2]; |
| int ret; |
| struct i2c_msg msgs[] = { |
| { |
| .addr = 0x50, |
| .flags = 0, |
| .len = 1, |
| .buf = out_buf, |
| }, |
| { |
| .addr = 0x50, |
| .flags = I2C_M_RD, |
| .len = 1, |
| .buf = buf, |
| } |
| }; |
| |
| ret = i2c_transfer(&radeon_connector->ddc_bus->adapter, msgs, 2); |
| if (ret == 2) |
| return true; |
| |
| return false; |
| } |
| |
| |
| void radeon_i2c_do_lock(struct radeon_connector *radeon_connector, int lock_state) |
| { |
| struct radeon_device *rdev = radeon_connector->base.dev->dev_private; |
| 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 (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); |
| } |
| |
| temp = RREG32(rec->mask_clk_reg); |
| if (lock_state) |
| temp |= rec->mask_clk_mask; |
| else |
| temp &= ~rec->mask_clk_mask; |
| WREG32(rec->mask_clk_reg, temp); |
| temp = RREG32(rec->mask_clk_reg); |
| |
| temp = RREG32(rec->mask_data_reg); |
| if (lock_state) |
| temp |= rec->mask_data_mask; |
| else |
| temp &= ~rec->mask_data_mask; |
| WREG32(rec->mask_data_reg, temp); |
| temp = RREG32(rec->mask_data_reg); |
| } |
| |
| static int get_clock(void *i2c_priv) |
| { |
| struct radeon_i2c_chan *i2c = i2c_priv; |
| struct radeon_device *rdev = i2c->dev->dev_private; |
| struct radeon_i2c_bus_rec *rec = &i2c->rec; |
| uint32_t val; |
| |
| val = RREG32(rec->get_clk_reg); |
| val &= rec->get_clk_mask; |
| |
| return (val != 0); |
| } |
| |
| |
| static int get_data(void *i2c_priv) |
| { |
| struct radeon_i2c_chan *i2c = i2c_priv; |
| struct radeon_device *rdev = i2c->dev->dev_private; |
| struct radeon_i2c_bus_rec *rec = &i2c->rec; |
| uint32_t val; |
| |
| val = RREG32(rec->get_data_reg); |
| val &= rec->get_data_mask; |
| return (val != 0); |
| } |
| |
| static void set_clock(void *i2c_priv, int clock) |
| { |
| struct radeon_i2c_chan *i2c = i2c_priv; |
| struct radeon_device *rdev = i2c->dev->dev_private; |
| 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); |
| } |
| |
| static void set_data(void *i2c_priv, int data) |
| { |
| struct radeon_i2c_chan *i2c = i2c_priv; |
| struct radeon_device *rdev = i2c->dev->dev_private; |
| 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); |
| } |
| |
| struct radeon_i2c_chan *radeon_i2c_create(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->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; |
| /* 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->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); |
| goto out_free; |
| } |
| |
| return i2c; |
| out_free: |
| kfree(i2c); |
| return NULL; |
| |
| } |
| |
| void radeon_i2c_destroy(struct radeon_i2c_chan *i2c) |
| { |
| if (!i2c) |
| return; |
| |
| i2c_del_adapter(&i2c->adapter); |
| kfree(i2c); |
| } |
| |
| struct drm_encoder *radeon_best_encoder(struct drm_connector *connector) |
| { |
| return NULL; |
| } |