132 lines
3.7 KiB
C
132 lines
3.7 KiB
C
/*
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* Copyright 2007-8 Advanced Micro Devices, Inc.
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* Copyright 2008 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Dave Airlie
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* Alex Deucher
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*/
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#include "drmP.h"
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#include "radeon_drm.h"
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#include "radeon_drv.h"
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static int get_clock(void *i2c_priv)
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{
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struct radeon_i2c_chan *i2c = i2c_priv;
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struct drm_radeon_private *dev_priv = i2c->dev->dev_private;
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struct radeon_i2c_bus_rec *rec = &i2c->rec;
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uint32_t val;
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val = RADEON_READ(rec->get_clk_reg);
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val &= rec->get_clk_mask;
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return (val != 0);
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}
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static int get_data(void *i2c_priv)
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{
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struct radeon_i2c_chan *i2c = i2c_priv;
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struct drm_radeon_private *dev_priv = i2c->dev->dev_private;
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struct radeon_i2c_bus_rec *rec = &i2c->rec;
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uint32_t val;
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val = RADEON_READ(rec->get_data_reg);
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val &= rec->get_data_mask;
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return (val != 0);
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}
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static void set_clock(void *i2c_priv, int clock)
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{
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struct radeon_i2c_chan *i2c = i2c_priv;
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struct drm_radeon_private *dev_priv = i2c->dev->dev_private;
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struct radeon_i2c_bus_rec *rec = &i2c->rec;
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uint32_t val;
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val = RADEON_READ(rec->put_clk_reg) & (uint32_t)~(rec->put_clk_mask);
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val |= clock ? 0 : rec->put_clk_mask;
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RADEON_WRITE(rec->put_clk_reg, val);
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}
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static void set_data(void *i2c_priv, int data)
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{
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struct radeon_i2c_chan *i2c = i2c_priv;
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struct drm_radeon_private *dev_priv = i2c->dev->dev_private;
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struct radeon_i2c_bus_rec *rec = &i2c->rec;
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uint32_t val;
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val = RADEON_READ(rec->put_data_reg) & (uint32_t)~(rec->put_data_mask);
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val |= data ? 0 : rec->put_data_mask;
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RADEON_WRITE(rec->put_data_reg, val);
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}
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struct radeon_i2c_chan *radeon_i2c_create(struct drm_device *dev,
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struct radeon_i2c_bus_rec *rec,
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const char *name)
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{
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struct radeon_i2c_chan *i2c;
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int ret;
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i2c = drm_calloc(1, sizeof(struct radeon_i2c_chan), DRM_MEM_DRIVER);
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if (i2c == NULL)
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return NULL;
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i2c->adapter.owner = THIS_MODULE;
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i2c->adapter.id = I2C_HW_B_RADEON;
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i2c->adapter.algo_data = &i2c->algo;
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i2c->dev = dev;
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i2c->algo.setsda = set_data;
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i2c->algo.setscl = set_clock;
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i2c->algo.getsda = get_data;
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i2c->algo.getscl = get_clock;
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i2c->algo.udelay = 20;
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i2c->algo.timeout = usecs_to_jiffies(2200);
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i2c->algo.data = i2c;
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i2c->rec = *rec;
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i2c_set_adapdata(&i2c->adapter, i2c);
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ret = i2c_bit_add_bus(&i2c->adapter);
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if (ret) {
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DRM_INFO("Failed to register i2c %s\n", name);
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goto out_free;
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}
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return i2c;
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out_free:
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drm_free(i2c, sizeof(struct radeon_i2c_chan), DRM_MEM_DRIVER);
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return NULL;
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}
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void radeon_i2c_destroy(struct radeon_i2c_chan *i2c)
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{
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if (!i2c)
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return;
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i2c_del_adapter(&i2c->adapter);
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drm_free(i2c, sizeof(struct radeon_i2c_chan), DRM_MEM_DRIVER);
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}
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struct drm_encoder *radeon_best_encoder(struct drm_connector *connector)
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{
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return NULL;
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}
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