diff options
Diffstat (limited to 'drivers/gpu/drm/mgag200/mgag200_i2c.c')
| -rw-r--r-- | drivers/gpu/drm/mgag200/mgag200_i2c.c | 129 |
1 files changed, 0 insertions, 129 deletions
diff --git a/drivers/gpu/drm/mgag200/mgag200_i2c.c b/drivers/gpu/drm/mgag200/mgag200_i2c.c deleted file mode 100644 index 423eb302be7e..000000000000 --- a/drivers/gpu/drm/mgag200/mgag200_i2c.c +++ /dev/null @@ -1,129 +0,0 @@ -/* - * 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 "mgag200_drv.h" - -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 mga_gpio_setsda(void *data, int state) -{ - struct mga_i2c_chan *i2c = data; - struct mga_device *mdev = to_mga_device(i2c->dev); - mga_i2c_set(mdev, i2c->data, state); -} - -static void mga_gpio_setscl(void *data, int state) -{ - struct mga_i2c_chan *i2c = data; - struct mga_device *mdev = to_mga_device(i2c->dev); - mga_i2c_set(mdev, i2c->clock, state); -} - -static int mga_gpio_getsda(void *data) -{ - struct mga_i2c_chan *i2c = data; - struct mga_device *mdev = to_mga_device(i2c->dev); - return (mga_i2c_read_gpio(mdev) & i2c->data) ? 1 : 0; -} - -static int mga_gpio_getscl(void *data) -{ - struct mga_i2c_chan *i2c = data; - struct mga_device *mdev = to_mga_device(i2c->dev); - return (mga_i2c_read_gpio(mdev) & i2c->clock) ? 1 : 0; -} - -static void mgag200_i2c_release(void *res) -{ - struct mga_i2c_chan *i2c = res; - - i2c_del_adapter(&i2c->adapter); -} - -int mgag200_i2c_init(struct mga_device *mdev, struct mga_i2c_chan *i2c) -{ - struct drm_device *dev = &mdev->base; - const struct mgag200_device_info *info = mdev->info; - int ret; - - WREG_DAC(MGA1064_GEN_IO_CTL2, 1); - WREG_DAC(MGA1064_GEN_IO_DATA, 0xff); - WREG_DAC(MGA1064_GEN_IO_CTL, 0); - - i2c->data = BIT(info->i2c.data_bit); - i2c->clock = BIT(info->i2c.clock_bit); - i2c->adapter.owner = THIS_MODULE; - i2c->adapter.dev.parent = dev->dev; - i2c->dev = dev; - i2c_set_adapdata(&i2c->adapter, i2c); - snprintf(i2c->adapter.name, sizeof(i2c->adapter.name), "mga i2c"); - - i2c->adapter.algo_data = &i2c->bit; - - i2c->bit.udelay = 10; - i2c->bit.timeout = 2; - i2c->bit.data = i2c; - i2c->bit.setsda = mga_gpio_setsda; - i2c->bit.setscl = mga_gpio_setscl; - i2c->bit.getsda = mga_gpio_getsda; - i2c->bit.getscl = mga_gpio_getscl; - - ret = i2c_bit_add_bus(&i2c->adapter); - if (ret) - return ret; - - return devm_add_action_or_reset(dev->dev, mgag200_i2c_release, i2c); -} |