1 files changed, 311 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/i2caux/dce110/i2caux_dce110.c b/drivers/gpu/drm/amd/display/dc/i2caux/dce110/i2caux_dce110.c
new file mode 100644
index 000000000000..2a047f8ca0e9
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/i2caux/dce110/i2caux_dce110.c
@@ -0,0 +1,311 @@
+/*
+ * Copyright 2012-15 Advanced Micro Devices, Inc.
+ *
+ * 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, sublicense,
+ * 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 above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors: AMD
+ *
+ */
+
+#include "dm_services.h"
+
+/*
+ * Pre-requisites: headers required by header of this unit
+ */
+#include "include/i2caux_interface.h"
+#include "../i2caux.h"
+#include "../engine.h"
+#include "../i2c_engine.h"
+#include "../i2c_sw_engine.h"
+#include "../i2c_hw_engine.h"
+
+/*
+ * Header of this unit
+ */
+#include "i2caux_dce110.h"
+
+#include "i2c_sw_engine_dce110.h"
+#include "i2c_hw_engine_dce110.h"
+#include "aux_engine_dce110.h"
+
+/*
+ * Post-requisites: headers required by this unit
+ */
+
+/*
+ * This unit
+ */
+/*cast pointer to struct i2caux TO pointer to struct i2caux_dce110*/
+#define FROM_I2C_AUX(ptr) \
+	container_of((ptr), struct i2caux_dce110, base)
+
+static void destruct(
+	struct i2caux_dce110 *i2caux_dce110)
+{
+	dal_i2caux_destruct(&i2caux_dce110->base);
+}
+
+static void destroy(
+	struct i2caux **i2c_engine)
+{
+	struct i2caux_dce110 *i2caux_dce110 = FROM_I2C_AUX(*i2c_engine);
+
+	destruct(i2caux_dce110);
+
+	kfree(i2caux_dce110);
+
+	*i2c_engine = NULL;
+}
+
+static struct i2c_engine *acquire_i2c_hw_engine(
+	struct i2caux *i2caux,
+	struct ddc *ddc)
+{
+	struct i2caux_dce110 *i2caux_dce110 = FROM_I2C_AUX(i2caux);
+
+	struct i2c_engine *engine = NULL;
+	/* generic hw engine is not used for EDID read
+	 * It may be needed for external i2c device, like thermal chip,
+	 * TODO will be implemented when needed.
+	 * check dce80 bool non_generic for generic hw engine;
+	 */
+
+	if (!ddc)
+		return NULL;
+
+	if (ddc->hw_info.hw_supported) {
+		enum gpio_ddc_line line = dal_ddc_get_line(ddc);
+
+		if (line < GPIO_DDC_LINE_COUNT)
+			engine = i2caux->i2c_hw_engines[line];
+	}
+
+	if (!engine)
+		return NULL;
+
+	if (!i2caux_dce110->i2c_hw_buffer_in_use &&
+		engine->base.funcs->acquire(&engine->base, ddc)) {
+		i2caux_dce110->i2c_hw_buffer_in_use = true;
+		return engine;
+	}
+
+	return NULL;
+}
+
+static void release_engine(
+	struct i2caux *i2caux,
+	struct engine *engine)
+{
+	struct i2caux_dce110 *i2caux_dce110 = FROM_I2C_AUX(i2caux);
+
+	if (engine->funcs->get_engine_type(engine) ==
+		I2CAUX_ENGINE_TYPE_I2C_DDC_HW)
+		i2caux_dce110->i2c_hw_buffer_in_use = false;
+
+	dal_i2caux_release_engine(i2caux, engine);
+}
+
+static const enum gpio_ddc_line hw_ddc_lines[] = {
+	GPIO_DDC_LINE_DDC1,
+	GPIO_DDC_LINE_DDC2,
+	GPIO_DDC_LINE_DDC3,
+	GPIO_DDC_LINE_DDC4,
+	GPIO_DDC_LINE_DDC5,
+	GPIO_DDC_LINE_DDC6,
+};
+
+static const enum gpio_ddc_line hw_aux_lines[] = {
+	GPIO_DDC_LINE_DDC1,
+	GPIO_DDC_LINE_DDC2,
+	GPIO_DDC_LINE_DDC3,
+	GPIO_DDC_LINE_DDC4,
+	GPIO_DDC_LINE_DDC5,
+	GPIO_DDC_LINE_DDC6,
+};
+
+/* function table */
+static const struct i2caux_funcs i2caux_funcs = {
+	.destroy = destroy,
+	.acquire_i2c_hw_engine = acquire_i2c_hw_engine,
+	.release_engine = release_engine,
+	.acquire_i2c_sw_engine = dal_i2caux_acquire_i2c_sw_engine,
+	.acquire_aux_engine = dal_i2caux_acquire_aux_engine,
+};
+
+#include "dce/dce_11_0_d.h"
+#include "dce/dce_11_0_sh_mask.h"
+
+/* set register offset */
+#define SR(reg_name)\
+	.reg_name = mm ## reg_name
+
+/* set register offset with instance */
+#define SRI(reg_name, block, id)\
+	.reg_name = mm ## block ## id ## _ ## reg_name
+
+#define aux_regs(id)\
+[id] = {\
+	AUX_COMMON_REG_LIST(id), \
+	.AUX_RESET_MASK = AUX_CONTROL__AUX_RESET_MASK \
+}
+
+#define hw_engine_regs(id)\
+{\
+		I2C_HW_ENGINE_COMMON_REG_LIST(id) \
+}
+
+static const struct dce110_aux_registers dce110_aux_regs[] = {
+		aux_regs(0),
+		aux_regs(1),
+		aux_regs(2),
+		aux_regs(3),
+		aux_regs(4),
+		aux_regs(5)
+};
+
+static const struct dce110_i2c_hw_engine_registers i2c_hw_engine_regs[] = {
+		hw_engine_regs(1),
+		hw_engine_regs(2),
+		hw_engine_regs(3),
+		hw_engine_regs(4),
+		hw_engine_regs(5),
+		hw_engine_regs(6)
+};
+
+static const struct dce110_i2c_hw_engine_shift i2c_shift = {
+		I2C_COMMON_MASK_SH_LIST_DCE110(__SHIFT)
+};
+
+static const struct dce110_i2c_hw_engine_mask i2c_mask = {
+		I2C_COMMON_MASK_SH_LIST_DCE110(_MASK)
+};
+
+void dal_i2caux_dce110_construct(
+	struct i2caux_dce110 *i2caux_dce110,
+	struct dc_context *ctx,
+	const struct dce110_aux_registers aux_regs[],
+	const struct dce110_i2c_hw_engine_registers i2c_hw_engine_regs[],
+	const struct dce110_i2c_hw_engine_shift *i2c_shift,
+	const struct dce110_i2c_hw_engine_mask *i2c_mask)
+{
+	uint32_t i = 0;
+	uint32_t reference_frequency = 0;
+	bool use_i2c_sw_engine = false;
+	struct i2caux *base = NULL;
+	/*TODO: For CZ bring up, if dal_i2caux_get_reference_clock
+	 * does not return 48KHz, we need hard coded for 48Khz.
+	 * Some BIOS setting incorrect cause this
+	 * For production, we always get value from BIOS*/
+	reference_frequency =
+		dal_i2caux_get_reference_clock(ctx->dc_bios) >> 1;
+
+	base = &i2caux_dce110->base;
+
+	dal_i2caux_construct(base, ctx);
+
+	i2caux_dce110->base.funcs = &i2caux_funcs;
+	i2caux_dce110->i2c_hw_buffer_in_use = false;
+	/* Create I2C engines (DDC lines per connector)
+	 * different I2C/AUX usage cases, DDC, Generic GPIO, AUX.
+	 */
+	do {
+		enum gpio_ddc_line line_id = hw_ddc_lines[i];
+
+		struct i2c_hw_engine_dce110_create_arg hw_arg_dce110;
+
+		if (use_i2c_sw_engine) {
+			struct i2c_sw_engine_dce110_create_arg sw_arg;
+
+			sw_arg.engine_id = i;
+			sw_arg.default_speed = base->default_i2c_sw_speed;
+			sw_arg.ctx = ctx;
+			base->i2c_sw_engines[line_id] =
+				dal_i2c_sw_engine_dce110_create(&sw_arg);
+		}
+
+		hw_arg_dce110.engine_id = i;
+		hw_arg_dce110.reference_frequency = reference_frequency;
+		hw_arg_dce110.default_speed = base->default_i2c_hw_speed;
+		hw_arg_dce110.ctx = ctx;
+		hw_arg_dce110.regs = &i2c_hw_engine_regs[i];
+		hw_arg_dce110.i2c_shift = i2c_shift;
+		hw_arg_dce110.i2c_mask = i2c_mask;
+
+		base->i2c_hw_engines[line_id] =
+			dal_i2c_hw_engine_dce110_create(&hw_arg_dce110);
+
+		++i;
+	} while (i < ARRAY_SIZE(hw_ddc_lines));
+
+	/* Create AUX engines for all lines which has assisted HW AUX
+	 * 'i' (loop counter) used as DDC/AUX engine_id */
+
+	i = 0;
+
+	do {
+		enum gpio_ddc_line line_id = hw_aux_lines[i];
+
+		struct aux_engine_dce110_init_data aux_init_data;
+
+		aux_init_data.engine_id = i;
+		aux_init_data.timeout_period = base->aux_timeout_period;
+		aux_init_data.ctx = ctx;
+		aux_init_data.regs = &aux_regs[i];
+
+		base->aux_engines[line_id] =
+			dal_aux_engine_dce110_create(&aux_init_data);
+
+		++i;
+	} while (i < ARRAY_SIZE(hw_aux_lines));
+
+	/*TODO Generic I2C SW and HW*/
+}
+
+/*
+ * dal_i2caux_dce110_create
+ *
+ * @brief
+ * public interface to allocate memory for DCE11 I2CAUX
+ *
+ * @param
+ * struct adapter_service *as - [in]
+ * struct dc_context *ctx - [in]
+ *
+ * @return
+ * pointer to the base struct of DCE11 I2CAUX
+ */
+struct i2caux *dal_i2caux_dce110_create(
+	struct dc_context *ctx)
+{
+	struct i2caux_dce110 *i2caux_dce110 =
+		kzalloc(sizeof(struct i2caux_dce110), GFP_KERNEL);
+
+	if (!i2caux_dce110) {
+		ASSERT_CRITICAL(false);
+		return NULL;
+	}
+
+	dal_i2caux_dce110_construct(i2caux_dce110,
+				    ctx,
+				    dce110_aux_regs,
+				    i2c_hw_engine_regs,
+				    &i2c_shift,
+				    &i2c_mask);
+	return &i2caux_dce110->base;
+}