diff options
Diffstat (limited to 'drivers/gpu/drm/mgag200/mgag200_i2c.c')
| -rw-r--r-- | drivers/gpu/drm/mgag200/mgag200_i2c.c | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/drivers/gpu/drm/mgag200/mgag200_i2c.c b/drivers/gpu/drm/mgag200/mgag200_i2c.c deleted file mode 100644 index 77d1c4771786..000000000000 --- a/drivers/gpu/drm/mgag200/mgag200_i2c.c +++ /dev/null @@ -1,158 +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.h> -#include <linux/i2c-algo-bit.h> -#include <drm/drmP.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 = i2c->dev->dev_private; - 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 = i2c->dev->dev_private; - mga_i2c_set(mdev, i2c->clock, state); -} - -static int mga_gpio_getsda(void *data) -{ - struct mga_i2c_chan *i2c = data; - struct mga_device *mdev = i2c->dev->dev_private; - 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 = i2c->dev->dev_private; - return (mga_i2c_read_gpio(mdev) & i2c->clock) ? 1 : 0; -} - -struct mga_i2c_chan *mgag200_i2c_create(struct drm_device *dev) -{ - struct mga_device *mdev = dev->dev_private; - struct mga_i2c_chan *i2c; - int ret; - int data, clock; - - WREG_DAC(MGA1064_GEN_IO_CTL2, 1); - WREG_DAC(MGA1064_GEN_IO_DATA, 0xff); - WREG_DAC(MGA1064_GEN_IO_CTL, 0); - - switch (mdev->type) { - case G200_SE_A: - case G200_SE_B: - case G200_EV: - case G200_WB: - case G200_EW3: - data = 1; - clock = 2; - break; - case G200_EH: - case G200_EH3: - case G200_ER: - data = 2; - clock = 1; - break; - default: - data = 2; - clock = 8; - break; - } - - i2c = kzalloc(sizeof(struct mga_i2c_chan), GFP_KERNEL); - if (!i2c) - return NULL; - - i2c->data = data; - i2c->clock = clock; - i2c->adapter.owner = THIS_MODULE; - i2c->adapter.class = I2C_CLASS_DDC; - i2c->adapter.dev.parent = &dev->pdev->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) { - kfree(i2c); - i2c = NULL; - } - return i2c; -} - -void mgag200_i2c_destroy(struct mga_i2c_chan *i2c) -{ - if (!i2c) - return; - i2c_del_adapter(&i2c->adapter); - kfree(i2c); -} - |