Line data    Source code

       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_destruct(
      50             :         struct hw_generic *pin)
      51             : {
      52           0 :         dal_hw_gpio_destruct(&pin->base);
      53             : }
      54             : 
      55           0 : static void dal_hw_generic_destroy(
      56             :         struct hw_gpio_pin **ptr)
      57             : {
      58           0 :         struct hw_generic *generic = HW_GENERIC_FROM_BASE(*ptr);
      59             : 
      60           0 :         dal_hw_generic_destruct(generic);
      61             : 
      62           0 :         kfree(generic);
      63             : 
      64           0 :         *ptr = NULL;
      65           0 : }
      66             : 
      67           0 : static enum gpio_result set_config(
      68             :         struct hw_gpio_pin *ptr,
      69             :         const struct gpio_config_data *config_data)
      70             : {
      71           0 :         struct hw_generic *generic = HW_GENERIC_FROM_BASE(ptr);
      72             : 
      73           0 :         if (!config_data)
      74             :                 return GPIO_RESULT_INVALID_DATA;
      75             : 
      76           0 :         REG_UPDATE_2(mux,
      77             :                 GENERIC_EN, config_data->config.generic_mux.enable_output_from_mux,
      78             :                 GENERIC_SEL, config_data->config.generic_mux.mux_select);
      79             : 
      80           0 :         return GPIO_RESULT_OK;
      81             : }
      82             : 
      83             : static const struct hw_gpio_pin_funcs funcs = {
      84             :         .destroy = dal_hw_generic_destroy,
      85             :         .open = dal_hw_gpio_open,
      86             :         .get_value = dal_hw_gpio_get_value,
      87             :         .set_value = dal_hw_gpio_set_value,
      88             :         .set_config = set_config,
      89             :         .change_mode = dal_hw_gpio_change_mode,
      90             :         .close = dal_hw_gpio_close,
      91             : };
      92             : 
      93             : static void dal_hw_generic_construct(
      94             :         struct hw_generic *pin,
      95             :         enum gpio_id id,
      96             :         uint32_t en,
      97             :         struct dc_context *ctx)
      98             : {
      99           0 :         dal_hw_gpio_construct(&pin->base, id, en, ctx);
     100           0 :         pin->base.base.funcs = &funcs;
     101             : }
     102             : 
     103           0 : void dal_hw_generic_init(
     104             :         struct hw_generic **hw_generic,
     105             :         struct dc_context *ctx,
     106             :         enum gpio_id id,
     107             :         uint32_t en)
     108             : {
     109           0 :         if ((en < GPIO_DDC_LINE_MIN) || (en > GPIO_DDC_LINE_MAX)) {
     110           0 :                 ASSERT_CRITICAL(false);
     111           0 :                 *hw_generic = NULL;
     112             :         }
     113             : 
     114           0 :         *hw_generic = kzalloc(sizeof(struct hw_generic), GFP_KERNEL);
     115           0 :         if (!*hw_generic) {
     116           0 :                 ASSERT_CRITICAL(false);
     117           0 :                 return;
     118             :         }
     119             : 
     120           0 :         dal_hw_generic_construct(*hw_generic, id, en, ctx);
     121             : }
     122             : 
     123             : 
     124           0 : struct hw_gpio_pin *dal_hw_generic_get_pin(struct gpio *gpio)
     125             : {
     126           0 :         struct hw_generic *hw_generic = dal_gpio_get_generic(gpio);
     127             : 
     128           0 :         return &hw_generic->base.base;
     129             : }