diff options
Diffstat (limited to 'drivers/gpu/drm/ast/ast_i2c.c')
| -rw-r--r-- | drivers/gpu/drm/ast/ast_i2c.c | 151 |
1 files changed, 0 insertions, 151 deletions
diff --git a/drivers/gpu/drm/ast/ast_i2c.c b/drivers/gpu/drm/ast/ast_i2c.c deleted file mode 100644 index e5d3f7121de4..000000000000 --- a/drivers/gpu/drm/ast/ast_i2c.c +++ /dev/null @@ -1,151 +0,0 @@ -// SPDX-License-Identifier: MIT -/* - * 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. - */ - -#include <drm/drm_managed.h> -#include <drm/drm_print.h> - -#include "ast_drv.h" - -static void ast_i2c_setsda(void *i2c_priv, int data) -{ - struct ast_i2c_chan *i2c = i2c_priv; - struct ast_device *ast = to_ast_device(i2c->dev); - int i; - u8 ujcrb7, jtemp; - - for (i = 0; i < 0x10000; i++) { - ujcrb7 = ((data & 0x01) ? 0 : 1) << 2; - ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0xb7, 0xf1, ujcrb7); - jtemp = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xb7, 0x04); - if (ujcrb7 == jtemp) - break; - } -} - -static void ast_i2c_setscl(void *i2c_priv, int clock) -{ - struct ast_i2c_chan *i2c = i2c_priv; - struct ast_device *ast = to_ast_device(i2c->dev); - int i; - u8 ujcrb7, jtemp; - - for (i = 0; i < 0x10000; i++) { - ujcrb7 = ((clock & 0x01) ? 0 : 1); - ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0xb7, 0xf4, ujcrb7); - jtemp = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xb7, 0x01); - if (ujcrb7 == jtemp) - break; - } -} - -static int ast_i2c_getsda(void *i2c_priv) -{ - struct ast_i2c_chan *i2c = i2c_priv; - struct ast_device *ast = to_ast_device(i2c->dev); - uint32_t val, val2, count, pass; - - count = 0; - pass = 0; - val = (ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xb7, 0x20) >> 5) & 0x01; - do { - val2 = (ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xb7, 0x20) >> 5) & 0x01; - if (val == val2) { - pass++; - } else { - pass = 0; - val = (ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xb7, 0x20) >> 5) & 0x01; - } - } while ((pass < 5) && (count++ < 0x10000)); - - return val & 1 ? 1 : 0; -} - -static int ast_i2c_getscl(void *i2c_priv) -{ - struct ast_i2c_chan *i2c = i2c_priv; - struct ast_device *ast = to_ast_device(i2c->dev); - uint32_t val, val2, count, pass; - - count = 0; - pass = 0; - val = (ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xb7, 0x10) >> 4) & 0x01; - do { - val2 = (ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xb7, 0x10) >> 4) & 0x01; - if (val == val2) { - pass++; - } else { - pass = 0; - val = (ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xb7, 0x10) >> 4) & 0x01; - } - } while ((pass < 5) && (count++ < 0x10000)); - - return val & 1 ? 1 : 0; -} - -static void ast_i2c_release(struct drm_device *dev, void *res) -{ - struct ast_i2c_chan *i2c = res; - - i2c_del_adapter(&i2c->adapter); - kfree(i2c); -} - -struct ast_i2c_chan *ast_i2c_create(struct drm_device *dev) -{ - struct ast_i2c_chan *i2c; - int ret; - - i2c = kzalloc(sizeof(struct ast_i2c_chan), GFP_KERNEL); - if (!i2c) - return NULL; - - 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), - "AST i2c bit bus"); - i2c->adapter.algo_data = &i2c->bit; - - i2c->bit.udelay = 20; - i2c->bit.timeout = 2; - i2c->bit.data = i2c; - i2c->bit.setsda = ast_i2c_setsda; - i2c->bit.setscl = ast_i2c_setscl; - i2c->bit.getsda = ast_i2c_getsda; - i2c->bit.getscl = ast_i2c_getscl; - ret = i2c_bit_add_bus(&i2c->adapter); - if (ret) { - drm_err(dev, "Failed to register bit i2c\n"); - goto out_kfree; - } - - ret = drmm_add_action_or_reset(dev, ast_i2c_release, i2c); - if (ret) - return NULL; - return i2c; - -out_kfree: - kfree(i2c); - return NULL; -} |