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      1 /*	$NetBSD: amdgpu_hw_generic.c,v 1.2 2021/12/18 23:45:04 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2012-15 Advanced Micro Devices, Inc.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included in
     14  * all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     22  * OTHER DEALINGS IN THE SOFTWARE.
     23  *
     24  * Authors: AMD
     25  *
     26  */
     27 
     28 #include <sys/cdefs.h>
     29 __KERNEL_RCSID(0, "$NetBSD: amdgpu_hw_generic.c,v 1.2 2021/12/18 23:45:04 riastradh Exp $");
     30 
     31 #include <linux/slab.h>
     32 
     33 #include "dm_services.h"
     34 
     35 #include "include/gpio_interface.h"
     36 #include "include/gpio_types.h"
     37 #include "hw_gpio.h"
     38 #include "hw_generic.h"
     39 
     40 #include "reg_helper.h"
     41 #include "generic_regs.h"
     42 
     43 #undef FN
     44 #define FN(reg_name, field_name) \
     45 	generic->shifts->field_name, generic->masks->field_name
     46 
     47 #define CTX \
     48 	generic->base.base.ctx
     49 #define REG(reg)\
     50 	(generic->regs->reg)
     51 
     52 struct gpio;
     53 
     54 static void dal_hw_generic_destruct(
     55 	struct hw_generic *pin)
     56 {
     57 	dal_hw_gpio_destruct(&pin->base);
     58 }
     59 
     60 static void dal_hw_generic_destroy(
     61 	struct hw_gpio_pin **ptr)
     62 {
     63 	struct hw_generic *generic = HW_GENERIC_FROM_BASE(*ptr);
     64 
     65 	dal_hw_generic_destruct(generic);
     66 
     67 	kfree(generic);
     68 
     69 	*ptr = NULL;
     70 }
     71 
     72 static enum gpio_result set_config(
     73 	struct hw_gpio_pin *ptr,
     74 	const struct gpio_config_data *config_data)
     75 {
     76 	struct hw_generic *generic = HW_GENERIC_FROM_BASE(ptr);
     77 
     78 	if (!config_data)
     79 		return GPIO_RESULT_INVALID_DATA;
     80 
     81 	REG_UPDATE_2(mux,
     82 		GENERIC_EN, config_data->config.generic_mux.enable_output_from_mux,
     83 		GENERIC_SEL, config_data->config.generic_mux.mux_select);
     84 
     85 	return GPIO_RESULT_OK;
     86 }
     87 
     88 static const struct hw_gpio_pin_funcs funcs = {
     89 	.destroy = dal_hw_generic_destroy,
     90 	.open = dal_hw_gpio_open,
     91 	.get_value = dal_hw_gpio_get_value,
     92 	.set_value = dal_hw_gpio_set_value,
     93 	.set_config = set_config,
     94 	.change_mode = dal_hw_gpio_change_mode,
     95 	.close = dal_hw_gpio_close,
     96 };
     97 
     98 static void dal_hw_generic_construct(
     99 	struct hw_generic *pin,
    100 	enum gpio_id id,
    101 	uint32_t en,
    102 	struct dc_context *ctx)
    103 {
    104 	dal_hw_gpio_construct(&pin->base, id, en, ctx);
    105 	pin->base.base.funcs = &funcs;
    106 }
    107 
    108 void dal_hw_generic_init(
    109 	struct hw_generic **hw_generic,
    110 	struct dc_context *ctx,
    111 	enum gpio_id id,
    112 	uint32_t en)
    113 {
    114 	if ((en < GPIO_DDC_LINE_MIN) || (en > GPIO_DDC_LINE_MAX)) {
    115 		ASSERT_CRITICAL(false);
    116 		*hw_generic = NULL;
    117 	}
    118 
    119 	*hw_generic = kzalloc(sizeof(struct hw_generic), GFP_KERNEL);
    120 	if (!*hw_generic) {
    121 		ASSERT_CRITICAL(false);
    122 		return;
    123 	}
    124 
    125 	dal_hw_generic_construct(*hw_generic, id, en, ctx);
    126 }
    127 
    128 
    129 struct hw_gpio_pin *dal_hw_generic_get_pin(struct gpio *gpio)
    130 {
    131 	struct hw_generic *hw_generic = dal_gpio_get_generic(gpio);
    132 
    133 	return &hw_generic->base.base;
    134 }
    135