New patch to review for coreboot: drivers/i2c/ovXXXX:[WIP] Add generic i2c driver for OV cameras

[Rizwan Qureshi]

Rizwan Qureshi ([e-mail]) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/18066

-gerrit

commit 00da8147898b3f0d56615b7d61afc4e068aab200
Author: Rizwan Qureshi 
Date:   Mon Jan 9 22:58:04 2017 +0530

drivers/i2c/ovXXXX:[WIP] Add generic i2c driver for OV cameras

Add generic i2c driver for OV cameras

Change-Id: I64afc42b898c866f81ed00bbca99e191f7d48c5a
    Signed-off-by: Rizwan Qureshi 
---
 src/drivers/i2c/ovXXXX/Kconfig      |   2 +
 src/drivers/i2c/ovXXXX/Makefile.inc |   1 +
 src/drivers/i2c/ovXXXX/chip.h       |  55 ++++++++++++++++++
 src/drivers/i2c/ovXXXX/ovXXXX.c     | 112 ++++++++++++++++++++++++++++++++++++
 4 files changed, 170 insertions(+)

diff --git a/src/drivers/i2c/ovXXXX/Kconfig b/src/drivers/i2c/ovXXXX/Kconfig
new file mode 100644
index 0000000..a853428
--- /dev/null
+++ b/src/drivers/i2c/ovXXXX/Kconfig
@@ -0,0 +1,2 @@
+config DRIVERS_I2C_OVXXXX
+	bool
diff --git a/src/drivers/i2c/ovXXXX/Makefile.inc b/src/drivers/i2c/ovXXXX/Makefile.inc
new file mode 100644
index 0000000..70e2d16
--- /dev/null
+++ b/src/drivers/i2c/ovXXXX/Makefile.inc
@@ -0,0 +1 @@
+ramstage-$(CONFIG_DRIVERS_I2C_OVXXXX) += ovXXXX.c
diff --git a/src/drivers/i2c/ovXXXX/chip.h b/src/drivers/i2c/ovXXXX/chip.h
new file mode 100644
index 0000000..ec86bca
--- /dev/null
+++ b/src/drivers/i2c/ovXXXX/chip.h
@@ -0,0 +1,55 @@
+#include <arch/acpi_device.h>
+
+#define MAX_SSDB_BUF 94
+
+typedef union {
+	uint8_t ssdb_arr[MAX_SSDB_BUF];
+	struct {
+		uint8_t version;
+		uint8_t sensor_card_sku;
+		uint8_t csi2_data_stream_interface[16];
+		uint16_t bdf_value;
+		uint32_t dphy_link_en_fuses;
+		uint32_t lanes_clock_division;
+		uint8_t link_used;
+		uint8_t lanes_used;
+		uint32_t csi_rx_dly_cnt_termen_clane;
+		uint32_t csi_rx_dly_cnt_settle_clane;
+		uint32_t csi_rx_dly_cnt_termen_dlane0;
+		uint32_t csi_rx_dly_cnt_settle_dlane0;
+		uint32_t csi_rx_dly_cnt_termen_dlane1;
+		uint32_t csi_rx_dly_cnt_settle_dlane1;
+		uint32_t csi_rx_dly_cnt_termen_dlane2;
+		uint32_t csi_rx_dly_cnt_settle_dlane2;
+		uint32_t csi_rx_dly_cnt_termen_dlane3;
+		uint32_t csi_rx_dly_cnt_settle_dlane3;
+		uint32_t max_lane_speed;
+		uint8_t sensor_calibration_file_index;
+		uint8_t sensor_calibration_file_index_mbz[3];
+		uint8_t rom_type;
+		uint8_t vcm_type;
+		uint8_t platform;
+		uint8_t platform_sub;
+		uint8_t flash_support;
+		uint8_t privacy_led;
+		uint8_t degree;		/* Camera module rotation */
+		uint8_t mipi_define;
+		uint32_t mclk;
+		uint8_t control_logic_id;
+		uint8_t mipi_data_format;
+		uint8_t silicon_version;
+		uint8_t customer_id;
+	}ssdb;
+}__attribute__((packed))ovXXXX_ssdb;
+
+struct drivers_i2c_ovXXXX_config {
+
+	/* I2C Bus Frequency in Hertz (default 400kHz) */
+	unsigned bus_speed;
+	ovXXXX_ssdb buf;
+	uint8_t vcm_addr;
+	uint8_t eeprom0_addr;
+	const char acpi_hid[8];
+	const char acpi_name[5];
+	uint64_t acpi_uid;
+};
diff --git a/src/drivers/i2c/ovXXXX/ovXXXX.c b/src/drivers/i2c/ovXXXX/ovXXXX.c
new file mode 100644
index 0000000..cf9c6fb
--- /dev/null
+++ b/src/drivers/i2c/ovXXXX/ovXXXX.c
@@ -0,0 +1,112 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2016 Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <arch/acpi.h>
+#include <arch/acpi_device.h>
+#include <arch/acpigen.h>
+#include <console/console.h>
+#include <device/i2c.h>
+#include <device/device.h>
+#include <device/path.h>
+#include <stdint.h>
+#include <string.h>
+#include "chip.h"
+
+#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
+
+static void ovXXXX_fill_ssdt(struct device *dev)
+{
+	struct drivers_i2c_ovXXXX_config *config = dev->chip_info;
+	const char *scope = acpi_device_scope(dev);
+	struct acpi_i2c i2c = {
+		.address = dev->path.i2c.device,
+		.mode_10bit = dev->path.i2c.mode_10bit,
+		.speed = config->bus_speed ? : I2C_SPEED_FAST,
+		.resource = scope,
+	};
+	struct acpi_i2c i2c_vcm = {
+		.address = config->vcm_addr,
+		.mode_10bit = dev->path.i2c.mode_10bit,
+		.speed = config->bus_speed ? : I2C_SPEED_FAST,
+		.resource = scope,
+	};
+
+	if (!dev->enabled || !scope)
+		return;
+
+	/* Device */
+	acpigen_write_scope(scope);
+	acpigen_write_device(acpi_device_name(dev));
+	acpigen_write_name_string("_HID", config->acpi_hid);
+	acpigen_write_name_integer("_UID", config->acpi_uid);
+	acpigen_write_name_string("_DDN", dev->chip_ops->name);
+	acpigen_write_STA(ACPI_STATUS_DEVICE_ALL_ON);
+
+	/* Resources */
+//	acpigen_write_method("_CRS", 0)
+	acpigen_write_name("_CRS");
+	acpigen_write_resourcetemplate_header();
+	acpi_device_write_i2c(&i2c);
+	acpi_device_write_i2c(&i2c_vcm);
+/*
+	int i;
+	for (i = 0; i < 4; i++) {
+		struct acpi_i2c i2c_eeprom = {
+			.address = config->eeprom0_addr + i,
+			.mode_10bit = dev->path.i2c.mode_10bit,
+			.speed = config->bus_speed ? : I2C_SPEED_FAST,
+			.resource = scope,
+		};
+		acpi_device_write_i2c(&i2c_eeprom);
+	}
+*/
+	acpigen_write_resourcetemplate_footer();
+
+	/* Device Properties */
+	acpigen_write_method_serialized("SSDB",0);
+	acpigen_write_return_byte_buffer((uint8_t *)&config->buf,
+					MAX_SSDB_BUF);
+	acpigen_pop_len(); /* Method */
+	acpigen_pop_len(); /* Device */
+	acpigen_pop_len(); /* Scope */
+
+}
+
+static const char *ovXXXX_acpi_name(struct device *dev)
+{
+	struct drivers_i2c_ovXXXX_config *config = dev->chip_info;
+	return config->acpi_name;
+}
+#endif
+
+static struct device_operations ovXXXX_ops = {
+	.read_resources		  = DEVICE_NOOP,
+	.set_resources		  = DEVICE_NOOP,
+	.enable_resources	  = DEVICE_NOOP,
+#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
+	.acpi_name                = &ovXXXX_acpi_name,
+	.acpi_fill_ssdt_generator = &ovXXXX_fill_ssdt,
+#endif
+};
+
+static void ovXXXX_enable(struct device *dev)
+{
+	dev->ops = &ovXXXX_ops;
+}
+
+struct chip_operations drivers_i2c_ovXXXX_ops = {
+	CHIP_NAME("OV CAMERA")
+	.enable_dev = &ovXXXX_enable
+};