root/drivers/gpu/drm/amd/display/dc/gpio/hw_generic.c

DEFINITIONS

1. dal_hw_generic_construct
2. dal_hw_generic_destruct
3. destroy
4. set_config
5. construct
6. dal_hw_generic_init
7. dal_hw_generic_get_pin

   1 /*
   2  * Copyright 2012-15 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Authors: AMD
  23  *
  24  */
  25 
  26 #include <linux/slab.h>
  27 
  28 #include "dm_services.h"
  29 
  30 #include "include/gpio_interface.h"
  31 #include "include/gpio_types.h"
  32 #include "hw_gpio.h"
  33 #include "hw_generic.h"
  34 
  35 #include "reg_helper.h"
  36 #include "generic_regs.h"
  37 
  38 #undef FN
  39 #define FN(reg_name, field_name) \
  40         generic->shifts->field_name, generic->masks->field_name
  41 
  42 #define CTX \
  43         generic->base.base.ctx
  44 #define REG(reg)\
  45         (generic->regs->reg)
  46 
  47 struct gpio;
  48 
  49 static void dal_hw_generic_construct(
  50         struct hw_generic *pin,
  51         enum gpio_id id,
  52         uint32_t en,
  53         struct dc_context *ctx)
  54 {
  55         dal_hw_gpio_construct(&pin->base, id, en, ctx);
  56 }
  57 
  58 static void dal_hw_generic_destruct(
  59         struct hw_generic *pin)
  60 {
  61         dal_hw_gpio_destruct(&pin->base);
  62 }
  63 
  64 static void destroy(
  65         struct hw_gpio_pin **ptr)
  66 {
  67         struct hw_generic *generic = HW_GENERIC_FROM_BASE(*ptr);
  68 
  69         dal_hw_generic_destruct(generic);
  70 
  71         kfree(generic);
  72 
  73         *ptr = NULL;
  74 }
  75 
  76 static enum gpio_result set_config(
  77         struct hw_gpio_pin *ptr,
  78         const struct gpio_config_data *config_data)
  79 {
  80         struct hw_generic *generic = HW_GENERIC_FROM_BASE(ptr);
  81 
  82         if (!config_data)
  83                 return GPIO_RESULT_INVALID_DATA;
  84 
  85         REG_UPDATE_2(mux,
  86                 GENERIC_EN, config_data->config.generic_mux.enable_output_from_mux,
  87                 GENERIC_SEL, config_data->config.generic_mux.mux_select);
  88 
  89         return GPIO_RESULT_OK;
  90 }
  91 
  92 static const struct hw_gpio_pin_funcs funcs = {
  93         .destroy = destroy,
  94         .open = dal_hw_gpio_open,
  95         .get_value = dal_hw_gpio_get_value,
  96         .set_value = dal_hw_gpio_set_value,
  97         .set_config = set_config,
  98         .change_mode = dal_hw_gpio_change_mode,
  99         .close = dal_hw_gpio_close,
 100 };
 101 
 102 static void construct(
 103         struct hw_generic *generic,
 104         enum gpio_id id,
 105         uint32_t en,
 106         struct dc_context *ctx)
 107 {
 108         dal_hw_generic_construct(generic, id, en, ctx);
 109         generic->base.base.funcs = &funcs;
 110 }
 111 
 112 void dal_hw_generic_init(
 113         struct hw_generic **hw_generic,
 114         struct dc_context *ctx,
 115         enum gpio_id id,
 116         uint32_t en)
 117 {
 118         if ((en < GPIO_DDC_LINE_MIN) || (en > GPIO_DDC_LINE_MAX)) {
 119                 ASSERT_CRITICAL(false);
 120                 *hw_generic = NULL;
 121         }
 122 
 123         *hw_generic = kzalloc(sizeof(struct hw_generic), GFP_KERNEL);
 124         if (!*hw_generic) {
 125                 ASSERT_CRITICAL(false);
 126                 return;
 127         }
 128 
 129         construct(*hw_generic, id, en, ctx);
 130 }
 131 
 132 
 133 struct hw_gpio_pin *dal_hw_generic_get_pin(struct gpio *gpio)
 134 {
 135         struct hw_generic *hw_generic = dal_gpio_get_generic(gpio);
 136 
 137         return &hw_generic->base.base;
 138 }