2 * Copyright 2012-15 Advanced Micro Devices, Inc.
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:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
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.
26 #include "dm_services.h"
28 #include "include/gpio_interface.h"
29 #include "include/gpio_types.h"
33 #include "reg_helper.h"
34 #include "gpio_regs.h"
38 #define FN(reg_name, field_name) \
39 ddc->shifts->field_name, ddc->masks->field_name
48 static void dal_hw_ddc_destruct(
51 dal_hw_gpio_destruct(&pin->base);
54 static void dal_hw_ddc_destroy(
55 struct hw_gpio_pin **ptr)
57 struct hw_ddc *pin = HW_DDC_FROM_BASE(*ptr);
59 dal_hw_ddc_destruct(pin);
66 static enum gpio_result set_config(
67 struct hw_gpio_pin *ptr,
68 const struct gpio_config_data *config_data)
70 struct hw_ddc *ddc = HW_DDC_FROM_BASE(ptr);
71 struct hw_gpio *hw_gpio = NULL;
73 uint32_t ddc_data_pd_en = 0;
74 uint32_t ddc_clk_pd_en = 0;
75 uint32_t aux_pad_mode = 0;
79 if (hw_gpio == NULL) {
80 ASSERT_CRITICAL(false);
81 return GPIO_RESULT_NULL_HANDLE;
84 regval = REG_GET_3(gpio.MASK_reg,
85 DC_GPIO_DDC1DATA_PD_EN, &ddc_data_pd_en,
86 DC_GPIO_DDC1CLK_PD_EN, &ddc_clk_pd_en,
87 AUX_PAD1_MODE, &aux_pad_mode);
89 switch (config_data->config.ddc.type) {
90 case GPIO_DDC_CONFIG_TYPE_MODE_I2C:
91 /* On plug-in, there is a transient level on the pad
92 * which must be discharged through the internal pull-down.
93 * Enable internal pull-down, 2.5msec discharge time
94 * is required for detection of AUX mode */
95 if (hw_gpio->base.en != GPIO_DDC_LINE_VIP_PAD) {
96 if (!ddc_data_pd_en || !ddc_clk_pd_en) {
98 REG_SET_2(gpio.MASK_reg, regval,
99 DC_GPIO_DDC1DATA_PD_EN, 1,
100 DC_GPIO_DDC1CLK_PD_EN, 1);
102 if (config_data->type ==
103 GPIO_CONFIG_TYPE_I2C_AUX_DUAL_MODE)
107 uint32_t sda_pd_dis = 0;
108 uint32_t scl_pd_dis = 0;
110 REG_GET_2(gpio.MASK_reg,
111 DC_GPIO_SDA_PD_DIS, &sda_pd_dis,
112 DC_GPIO_SCL_PD_DIS, &scl_pd_dis);
115 REG_SET(gpio.MASK_reg, regval,
116 DC_GPIO_SDA_PD_DIS, 0);
118 if (config_data->type ==
119 GPIO_CONFIG_TYPE_I2C_AUX_DUAL_MODE)
124 REG_SET(gpio.MASK_reg, regval,
125 DC_GPIO_SCL_PD_DIS, 1);
127 if (config_data->type ==
128 GPIO_CONFIG_TYPE_I2C_AUX_DUAL_MODE)
134 /* let pins to get de-asserted
135 * before setting pad to I2C mode */
136 if (config_data->config.ddc.data_en_bit_present ||
137 config_data->config.ddc.clock_en_bit_present)
138 /* [anaumov] in DAL2, there was
139 * dc_service_delay_in_microseconds(2000); */
142 /* set the I2C pad mode */
143 /* read the register again,
144 * some bits may have been changed */
145 REG_UPDATE(gpio.MASK_reg,
149 if (ddc->regs->dc_gpio_aux_ctrl_5 != 0) {
150 REG_UPDATE(dc_gpio_aux_ctrl_5, DDC_PAD_I2CMODE, 1);
152 //set DC_IO_aux_rxsel = 2'b01
153 if (ddc->regs->phy_aux_cntl != 0) {
154 REG_UPDATE(phy_aux_cntl, AUX_PAD_RXSEL, 1);
156 return GPIO_RESULT_OK;
157 case GPIO_DDC_CONFIG_TYPE_MODE_AUX:
158 /* set the AUX pad mode */
160 REG_SET(gpio.MASK_reg, regval,
163 if (ddc->regs->dc_gpio_aux_ctrl_5 != 0) {
164 REG_UPDATE(dc_gpio_aux_ctrl_5,
168 return GPIO_RESULT_OK;
169 case GPIO_DDC_CONFIG_TYPE_POLL_FOR_CONNECT:
170 if ((hw_gpio->base.en >= GPIO_DDC_LINE_DDC1) &&
171 (hw_gpio->base.en <= GPIO_DDC_LINE_DDC_VGA)) {
172 REG_UPDATE_3(ddc_setup,
173 DC_I2C_DDC1_ENABLE, 1,
174 DC_I2C_DDC1_EDID_DETECT_ENABLE, 1,
175 DC_I2C_DDC1_EDID_DETECT_MODE, 0);
176 return GPIO_RESULT_OK;
179 case GPIO_DDC_CONFIG_TYPE_POLL_FOR_DISCONNECT:
180 if ((hw_gpio->base.en >= GPIO_DDC_LINE_DDC1) &&
181 (hw_gpio->base.en <= GPIO_DDC_LINE_DDC_VGA)) {
182 REG_UPDATE_3(ddc_setup,
183 DC_I2C_DDC1_ENABLE, 1,
184 DC_I2C_DDC1_EDID_DETECT_ENABLE, 1,
185 DC_I2C_DDC1_EDID_DETECT_MODE, 1);
186 return GPIO_RESULT_OK;
189 case GPIO_DDC_CONFIG_TYPE_DISABLE_POLLING:
190 if ((hw_gpio->base.en >= GPIO_DDC_LINE_DDC1) &&
191 (hw_gpio->base.en <= GPIO_DDC_LINE_DDC_VGA)) {
192 REG_UPDATE_2(ddc_setup,
193 DC_I2C_DDC1_ENABLE, 0,
194 DC_I2C_DDC1_EDID_DETECT_ENABLE, 0);
195 return GPIO_RESULT_OK;
202 return GPIO_RESULT_NON_SPECIFIC_ERROR;
205 static const struct hw_gpio_pin_funcs funcs = {
206 .destroy = dal_hw_ddc_destroy,
207 .open = dal_hw_gpio_open,
208 .get_value = dal_hw_gpio_get_value,
209 .set_value = dal_hw_gpio_set_value,
210 .set_config = set_config,
211 .change_mode = dal_hw_gpio_change_mode,
212 .close = dal_hw_gpio_close,
215 static void dal_hw_ddc_construct(
219 struct dc_context *ctx)
221 dal_hw_gpio_construct(&ddc->base, id, en, ctx);
222 ddc->base.base.funcs = &funcs;
225 void dal_hw_ddc_init(
226 struct hw_ddc **hw_ddc,
227 struct dc_context *ctx,
231 if ((en < GPIO_DDC_LINE_MIN) || (en > GPIO_DDC_LINE_MAX)) {
232 ASSERT_CRITICAL(false);
236 *hw_ddc = kzalloc(sizeof(struct hw_ddc), GFP_KERNEL);
238 ASSERT_CRITICAL(false);
242 dal_hw_ddc_construct(*hw_ddc, id, en, ctx);
245 struct hw_gpio_pin *dal_hw_ddc_get_pin(struct gpio *gpio)
247 struct hw_ddc *hw_ddc = dal_gpio_get_ddc(gpio);
249 return &hw_ddc->base.base;