![Eric Anholt](/assets/img/avatar_default.png)
It hasn't been used in ages, and having the user tell your how much memory is being freed at free time is a recipe for disaster even if it was ever used. Signed-off-by: Eric Anholt <eric@anholt.net>
210 lines
5.3 KiB
C
210 lines
5.3 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.h"
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/**
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* radeon_ddc_probe
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*
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*/
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bool radeon_ddc_probe(struct radeon_connector *radeon_connector)
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{
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u8 out_buf[] = { 0x0, 0x0};
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u8 buf[2];
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int ret;
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struct i2c_msg msgs[] = {
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{
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.addr = 0x50,
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.flags = 0,
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.len = 1,
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.buf = out_buf,
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},
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{
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.addr = 0x50,
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.flags = I2C_M_RD,
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.len = 1,
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.buf = buf,
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}
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};
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ret = i2c_transfer(&radeon_connector->ddc_bus->adapter, msgs, 2);
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if (ret == 2)
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return true;
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return false;
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}
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void radeon_i2c_do_lock(struct radeon_connector *radeon_connector, int lock_state)
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{
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struct radeon_device *rdev = radeon_connector->base.dev->dev_private;
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uint32_t temp;
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struct radeon_i2c_bus_rec *rec = &radeon_connector->ddc_bus->rec;
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/* RV410 appears to have a bug where the hw i2c in reset
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* holds the i2c port in a bad state - switch hw i2c away before
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* doing DDC - do this for all r200s/r300s/r400s for safety sake
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*/
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if ((rdev->family >= CHIP_R200) && !ASIC_IS_AVIVO(rdev)) {
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if (rec->a_clk_reg == RADEON_GPIO_MONID) {
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WREG32(RADEON_DVI_I2C_CNTL_0, (RADEON_I2C_SOFT_RST |
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R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1)));
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} else {
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WREG32(RADEON_DVI_I2C_CNTL_0, (RADEON_I2C_SOFT_RST |
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R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3)));
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}
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}
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if (lock_state) {
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temp = RREG32(rec->a_clk_reg);
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temp &= ~(rec->a_clk_mask);
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WREG32(rec->a_clk_reg, temp);
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temp = RREG32(rec->a_data_reg);
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temp &= ~(rec->a_data_mask);
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WREG32(rec->a_data_reg, temp);
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}
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temp = RREG32(rec->mask_clk_reg);
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if (lock_state)
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temp |= rec->mask_clk_mask;
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else
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temp &= ~rec->mask_clk_mask;
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WREG32(rec->mask_clk_reg, temp);
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temp = RREG32(rec->mask_clk_reg);
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temp = RREG32(rec->mask_data_reg);
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if (lock_state)
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temp |= rec->mask_data_mask;
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else
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temp &= ~rec->mask_data_mask;
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WREG32(rec->mask_data_reg, temp);
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temp = RREG32(rec->mask_data_reg);
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}
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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 radeon_device *rdev = 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 = RREG32(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 radeon_device *rdev = 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 = RREG32(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 radeon_device *rdev = 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 = RREG32(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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WREG32(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 radeon_device *rdev = 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 = RREG32(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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WREG32(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 = kzalloc(sizeof(struct radeon_i2c_chan), GFP_KERNEL);
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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.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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/* vesa says 2.2 ms is enough, 1 jiffy doesn't seem to always
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* make this, 2 jiffies is a lot more reliable */
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i2c->algo.timeout = 2;
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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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kfree(i2c);
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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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kfree(i2c);
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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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