Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Thomas Zimmermann | 345 | 49.36% | 22 | 84.62% |
Dave Airlie | 344 | 49.21% | 1 | 3.85% |
Julia Lemire | 7 | 1.00% | 1 | 3.85% |
Sam Ravnborg | 2 | 0.29% | 1 | 3.85% |
Javier Martinez Canillas | 1 | 0.14% | 1 | 3.85% |
Total | 699 | 26 |
/* * Copyright 2012 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, sub license, 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 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 NON-INFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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. * * The above copyright notice and this permission notice (including the * next paragraph) shall be included in all copies or substantial portions * of the Software. * */ /* * Authors: Dave Airlie <airlied@redhat.com> */ #include <linux/export.h> #include <linux/i2c-algo-bit.h> #include <linux/i2c.h> #include <linux/pci.h> #include <drm/drm_managed.h> #include "mgag200_ddc.h" #include "mgag200_drv.h" struct mgag200_ddc { struct mga_device *mdev; int data; int clock; struct i2c_algo_bit_data bit; struct i2c_adapter adapter; }; static int mga_i2c_read_gpio(struct mga_device *mdev) { WREG8(DAC_INDEX, MGA1064_GEN_IO_DATA); return RREG8(DAC_DATA); } static void mga_i2c_set_gpio(struct mga_device *mdev, int mask, int val) { int tmp; WREG8(DAC_INDEX, MGA1064_GEN_IO_CTL); tmp = (RREG8(DAC_DATA) & mask) | val; WREG_DAC(MGA1064_GEN_IO_CTL, tmp); WREG_DAC(MGA1064_GEN_IO_DATA, 0); } static inline void mga_i2c_set(struct mga_device *mdev, int mask, int state) { if (state) state = 0; else state = mask; mga_i2c_set_gpio(mdev, ~mask, state); } static void mgag200_ddc_algo_bit_data_setsda(void *data, int state) { struct mgag200_ddc *ddc = data; mga_i2c_set(ddc->mdev, ddc->data, state); } static void mgag200_ddc_algo_bit_data_setscl(void *data, int state) { struct mgag200_ddc *ddc = data; mga_i2c_set(ddc->mdev, ddc->clock, state); } static int mgag200_ddc_algo_bit_data_getsda(void *data) { struct mgag200_ddc *ddc = data; return (mga_i2c_read_gpio(ddc->mdev) & ddc->data) ? 1 : 0; } static int mgag200_ddc_algo_bit_data_getscl(void *data) { struct mgag200_ddc *ddc = data; return (mga_i2c_read_gpio(ddc->mdev) & ddc->clock) ? 1 : 0; } static int mgag200_ddc_algo_bit_data_pre_xfer(struct i2c_adapter *adapter) { struct mgag200_ddc *ddc = i2c_get_adapdata(adapter); struct mga_device *mdev = ddc->mdev; /* * Protect access to I/O registers from concurrent modesetting * by acquiring the I/O-register lock. */ mutex_lock(&mdev->rmmio_lock); return 0; } static void mgag200_ddc_algo_bit_data_post_xfer(struct i2c_adapter *adapter) { struct mgag200_ddc *ddc = i2c_get_adapdata(adapter); struct mga_device *mdev = ddc->mdev; mutex_unlock(&mdev->rmmio_lock); } static void mgag200_ddc_release(struct drm_device *dev, void *res) { struct mgag200_ddc *ddc = res; i2c_del_adapter(&ddc->adapter); } struct i2c_adapter *mgag200_ddc_create(struct mga_device *mdev) { struct drm_device *dev = &mdev->base; const struct mgag200_device_info *info = mdev->info; struct mgag200_ddc *ddc; struct i2c_algo_bit_data *bit; struct i2c_adapter *adapter; int ret; ddc = drmm_kzalloc(dev, sizeof(*ddc), GFP_KERNEL); if (!ddc) return ERR_PTR(-ENOMEM); WREG_DAC(MGA1064_GEN_IO_CTL2, 1); WREG_DAC(MGA1064_GEN_IO_DATA, 0xff); WREG_DAC(MGA1064_GEN_IO_CTL, 0); ddc->mdev = mdev; ddc->data = BIT(info->i2c.data_bit); ddc->clock = BIT(info->i2c.clock_bit); bit = &ddc->bit; bit->data = ddc; bit->setsda = mgag200_ddc_algo_bit_data_setsda; bit->setscl = mgag200_ddc_algo_bit_data_setscl; bit->getsda = mgag200_ddc_algo_bit_data_getsda; bit->getscl = mgag200_ddc_algo_bit_data_getscl; bit->pre_xfer = mgag200_ddc_algo_bit_data_pre_xfer; bit->post_xfer = mgag200_ddc_algo_bit_data_post_xfer; bit->udelay = 10; bit->timeout = usecs_to_jiffies(2200); adapter = &ddc->adapter; adapter->owner = THIS_MODULE; adapter->algo_data = bit; adapter->dev.parent = dev->dev; snprintf(adapter->name, sizeof(adapter->name), "Matrox DDC bus"); i2c_set_adapdata(adapter, ddc); ret = i2c_bit_add_bus(adapter); if (ret) return ERR_PTR(ret); ret = drmm_add_action_or_reset(dev, mgag200_ddc_release, ddc); if (ret) return ERR_PTR(ret); return adapter; }
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