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-rw-r--r--drivers/media/cec/platform/s5p/Makefile3
-rw-r--r--drivers/media/cec/platform/s5p/exynos_hdmi_cec.h34
-rw-r--r--drivers/media/cec/platform/s5p/exynos_hdmi_cecctrl.c206
-rw-r--r--drivers/media/cec/platform/s5p/regs-cec.h93
-rw-r--r--drivers/media/cec/platform/s5p/s5p_cec.c310
-rw-r--r--drivers/media/cec/platform/s5p/s5p_cec.h76
6 files changed, 722 insertions, 0 deletions
diff --git a/drivers/media/cec/platform/s5p/Makefile b/drivers/media/cec/platform/s5p/Makefile
new file mode 100644
index 000000000..92bf7b855
--- /dev/null
+++ b/drivers/media/cec/platform/s5p/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
+obj-$(CONFIG_CEC_SAMSUNG_S5P) += s5p-cec.o
+s5p-cec-y += s5p_cec.o exynos_hdmi_cecctrl.o
diff --git a/drivers/media/cec/platform/s5p/exynos_hdmi_cec.h b/drivers/media/cec/platform/s5p/exynos_hdmi_cec.h
new file mode 100644
index 000000000..325db8c43
--- /dev/null
+++ b/drivers/media/cec/platform/s5p/exynos_hdmi_cec.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* drivers/media/platform/s5p-cec/exynos_hdmi_cec.h
+ *
+ * Copyright (c) 2010, 2014 Samsung Electronics
+ * http://www.samsung.com/
+ *
+ * Header file for interface of Samsung Exynos hdmi cec hardware
+ */
+
+#ifndef _EXYNOS_HDMI_CEC_H_
+#define _EXYNOS_HDMI_CEC_H_ __FILE__
+
+#include <linux/regmap.h>
+#include "s5p_cec.h"
+
+void s5p_cec_set_divider(struct s5p_cec_dev *cec);
+void s5p_cec_enable_rx(struct s5p_cec_dev *cec);
+void s5p_cec_mask_rx_interrupts(struct s5p_cec_dev *cec);
+void s5p_cec_unmask_rx_interrupts(struct s5p_cec_dev *cec);
+void s5p_cec_mask_tx_interrupts(struct s5p_cec_dev *cec);
+void s5p_cec_unmask_tx_interrupts(struct s5p_cec_dev *cec);
+void s5p_cec_reset(struct s5p_cec_dev *cec);
+void s5p_cec_tx_reset(struct s5p_cec_dev *cec);
+void s5p_cec_rx_reset(struct s5p_cec_dev *cec);
+void s5p_cec_threshold(struct s5p_cec_dev *cec);
+void s5p_cec_copy_packet(struct s5p_cec_dev *cec, char *data,
+ size_t count, u8 retries);
+void s5p_cec_set_addr(struct s5p_cec_dev *cec, u32 addr);
+u32 s5p_cec_get_status(struct s5p_cec_dev *cec);
+void s5p_clr_pending_tx(struct s5p_cec_dev *cec);
+void s5p_clr_pending_rx(struct s5p_cec_dev *cec);
+void s5p_cec_get_rx_buf(struct s5p_cec_dev *cec, u32 size, u8 *buffer);
+
+#endif /* _EXYNOS_HDMI_CEC_H_ */
diff --git a/drivers/media/cec/platform/s5p/exynos_hdmi_cecctrl.c b/drivers/media/cec/platform/s5p/exynos_hdmi_cecctrl.c
new file mode 100644
index 000000000..eb981ebce
--- /dev/null
+++ b/drivers/media/cec/platform/s5p/exynos_hdmi_cecctrl.c
@@ -0,0 +1,206 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* drivers/media/platform/s5p-cec/exynos_hdmi_cecctrl.c
+ *
+ * Copyright (c) 2009, 2014 Samsung Electronics
+ * http://www.samsung.com/
+ *
+ * cec ftn file for Samsung TVOUT driver
+ */
+
+#include <linux/io.h>
+#include <linux/device.h>
+
+#include "exynos_hdmi_cec.h"
+#include "regs-cec.h"
+
+#define S5P_HDMI_FIN 24000000
+#define CEC_DIV_RATIO 320000
+
+#define CEC_MESSAGE_BROADCAST_MASK 0x0F
+#define CEC_MESSAGE_BROADCAST 0x0F
+#define CEC_FILTER_THRESHOLD 0x15
+
+void s5p_cec_set_divider(struct s5p_cec_dev *cec)
+{
+ u32 div_ratio, div_val;
+ unsigned int reg;
+
+ div_ratio = S5P_HDMI_FIN / CEC_DIV_RATIO - 1;
+
+ if (regmap_read(cec->pmu, EXYNOS_HDMI_PHY_CONTROL, &reg)) {
+ dev_err(cec->dev, "failed to read phy control\n");
+ return;
+ }
+
+ reg = (reg & ~(0x3FF << 16)) | (div_ratio << 16);
+
+ if (regmap_write(cec->pmu, EXYNOS_HDMI_PHY_CONTROL, reg)) {
+ dev_err(cec->dev, "failed to write phy control\n");
+ return;
+ }
+
+ div_val = CEC_DIV_RATIO * 0.00005 - 1;
+
+ writeb(0x0, cec->reg + S5P_CEC_DIVISOR_3);
+ writeb(0x0, cec->reg + S5P_CEC_DIVISOR_2);
+ writeb(0x0, cec->reg + S5P_CEC_DIVISOR_1);
+ writeb(div_val, cec->reg + S5P_CEC_DIVISOR_0);
+}
+
+void s5p_cec_enable_rx(struct s5p_cec_dev *cec)
+{
+ u8 reg;
+
+ reg = readb(cec->reg + S5P_CEC_RX_CTRL);
+ reg |= S5P_CEC_RX_CTRL_ENABLE;
+ writeb(reg, cec->reg + S5P_CEC_RX_CTRL);
+}
+
+void s5p_cec_mask_rx_interrupts(struct s5p_cec_dev *cec)
+{
+ u8 reg;
+
+ reg = readb(cec->reg + S5P_CEC_IRQ_MASK);
+ reg |= S5P_CEC_IRQ_RX_DONE;
+ reg |= S5P_CEC_IRQ_RX_ERROR;
+ writeb(reg, cec->reg + S5P_CEC_IRQ_MASK);
+}
+
+void s5p_cec_unmask_rx_interrupts(struct s5p_cec_dev *cec)
+{
+ u8 reg;
+
+ reg = readb(cec->reg + S5P_CEC_IRQ_MASK);
+ reg &= ~S5P_CEC_IRQ_RX_DONE;
+ reg &= ~S5P_CEC_IRQ_RX_ERROR;
+ writeb(reg, cec->reg + S5P_CEC_IRQ_MASK);
+}
+
+void s5p_cec_mask_tx_interrupts(struct s5p_cec_dev *cec)
+{
+ u8 reg;
+
+ reg = readb(cec->reg + S5P_CEC_IRQ_MASK);
+ reg |= S5P_CEC_IRQ_TX_DONE;
+ reg |= S5P_CEC_IRQ_TX_ERROR;
+ writeb(reg, cec->reg + S5P_CEC_IRQ_MASK);
+}
+
+void s5p_cec_unmask_tx_interrupts(struct s5p_cec_dev *cec)
+{
+ u8 reg;
+
+ reg = readb(cec->reg + S5P_CEC_IRQ_MASK);
+ reg &= ~S5P_CEC_IRQ_TX_DONE;
+ reg &= ~S5P_CEC_IRQ_TX_ERROR;
+ writeb(reg, cec->reg + S5P_CEC_IRQ_MASK);
+}
+
+void s5p_cec_reset(struct s5p_cec_dev *cec)
+{
+ u8 reg;
+
+ writeb(S5P_CEC_RX_CTRL_RESET, cec->reg + S5P_CEC_RX_CTRL);
+ writeb(S5P_CEC_TX_CTRL_RESET, cec->reg + S5P_CEC_TX_CTRL);
+
+ reg = readb(cec->reg + 0xc4);
+ reg &= ~0x1;
+ writeb(reg, cec->reg + 0xc4);
+}
+
+void s5p_cec_tx_reset(struct s5p_cec_dev *cec)
+{
+ writeb(S5P_CEC_TX_CTRL_RESET, cec->reg + S5P_CEC_TX_CTRL);
+}
+
+void s5p_cec_rx_reset(struct s5p_cec_dev *cec)
+{
+ u8 reg;
+
+ writeb(S5P_CEC_RX_CTRL_RESET, cec->reg + S5P_CEC_RX_CTRL);
+
+ reg = readb(cec->reg + 0xc4);
+ reg &= ~0x1;
+ writeb(reg, cec->reg + 0xc4);
+}
+
+void s5p_cec_threshold(struct s5p_cec_dev *cec)
+{
+ writeb(CEC_FILTER_THRESHOLD, cec->reg + S5P_CEC_RX_FILTER_TH);
+ writeb(0, cec->reg + S5P_CEC_RX_FILTER_CTRL);
+}
+
+void s5p_cec_copy_packet(struct s5p_cec_dev *cec, char *data,
+ size_t count, u8 retries)
+{
+ int i = 0;
+ u8 reg;
+
+ while (i < count) {
+ writeb(data[i], cec->reg + (S5P_CEC_TX_BUFF0 + (i * 4)));
+ i++;
+ }
+
+ writeb(count, cec->reg + S5P_CEC_TX_BYTES);
+ reg = readb(cec->reg + S5P_CEC_TX_CTRL);
+ reg |= S5P_CEC_TX_CTRL_START;
+ reg &= ~0x70;
+ reg |= retries << 4;
+
+ if ((data[0] & CEC_MESSAGE_BROADCAST_MASK) == CEC_MESSAGE_BROADCAST) {
+ dev_dbg(cec->dev, "Broadcast");
+ reg |= S5P_CEC_TX_CTRL_BCAST;
+ } else {
+ dev_dbg(cec->dev, "No Broadcast");
+ reg &= ~S5P_CEC_TX_CTRL_BCAST;
+ }
+
+ writeb(reg, cec->reg + S5P_CEC_TX_CTRL);
+ dev_dbg(cec->dev, "cec-tx: cec count (%zu): %*ph", count,
+ (int)count, data);
+}
+
+void s5p_cec_set_addr(struct s5p_cec_dev *cec, u32 addr)
+{
+ writeb(addr & 0x0F, cec->reg + S5P_CEC_LOGIC_ADDR);
+}
+
+u32 s5p_cec_get_status(struct s5p_cec_dev *cec)
+{
+ u32 status = 0;
+
+ status = readb(cec->reg + S5P_CEC_STATUS_0) & 0xf;
+ status |= (readb(cec->reg + S5P_CEC_TX_STAT1) & 0xf) << 4;
+ status |= readb(cec->reg + S5P_CEC_STATUS_1) << 8;
+ status |= readb(cec->reg + S5P_CEC_STATUS_2) << 16;
+ status |= readb(cec->reg + S5P_CEC_STATUS_3) << 24;
+
+ dev_dbg(cec->dev, "status = 0x%x!\n", status);
+
+ return status;
+}
+
+void s5p_clr_pending_tx(struct s5p_cec_dev *cec)
+{
+ writeb(S5P_CEC_IRQ_TX_DONE | S5P_CEC_IRQ_TX_ERROR,
+ cec->reg + S5P_CEC_IRQ_CLEAR);
+}
+
+void s5p_clr_pending_rx(struct s5p_cec_dev *cec)
+{
+ writeb(S5P_CEC_IRQ_RX_DONE | S5P_CEC_IRQ_RX_ERROR,
+ cec->reg + S5P_CEC_IRQ_CLEAR);
+}
+
+void s5p_cec_get_rx_buf(struct s5p_cec_dev *cec, u32 size, u8 *buffer)
+{
+ u32 i = 0;
+ char debug[40];
+
+ while (i < size) {
+ buffer[i] = readb(cec->reg + S5P_CEC_RX_BUFF0 + (i * 4));
+ sprintf(debug + i * 2, "%02x ", buffer[i]);
+ i++;
+ }
+ dev_dbg(cec->dev, "cec-rx: cec size(%d): %s", size, debug);
+}
diff --git a/drivers/media/cec/platform/s5p/regs-cec.h b/drivers/media/cec/platform/s5p/regs-cec.h
new file mode 100644
index 000000000..447f71702
--- /dev/null
+++ b/drivers/media/cec/platform/s5p/regs-cec.h
@@ -0,0 +1,93 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* drivers/media/platform/s5p-cec/regs-cec.h
+ *
+ * Copyright (c) 2010 Samsung Electronics
+ * http://www.samsung.com/
+ *
+ * register header file for Samsung TVOUT driver
+ */
+
+#ifndef __EXYNOS_REGS__H
+#define __EXYNOS_REGS__H
+
+/*
+ * Register part
+ */
+#define S5P_CEC_STATUS_0 (0x0000)
+#define S5P_CEC_STATUS_1 (0x0004)
+#define S5P_CEC_STATUS_2 (0x0008)
+#define S5P_CEC_STATUS_3 (0x000C)
+#define S5P_CEC_IRQ_MASK (0x0010)
+#define S5P_CEC_IRQ_CLEAR (0x0014)
+#define S5P_CEC_LOGIC_ADDR (0x0020)
+#define S5P_CEC_DIVISOR_0 (0x0030)
+#define S5P_CEC_DIVISOR_1 (0x0034)
+#define S5P_CEC_DIVISOR_2 (0x0038)
+#define S5P_CEC_DIVISOR_3 (0x003C)
+
+#define S5P_CEC_TX_CTRL (0x0040)
+#define S5P_CEC_TX_BYTES (0x0044)
+#define S5P_CEC_TX_STAT0 (0x0060)
+#define S5P_CEC_TX_STAT1 (0x0064)
+#define S5P_CEC_TX_BUFF0 (0x0080)
+#define S5P_CEC_TX_BUFF1 (0x0084)
+#define S5P_CEC_TX_BUFF2 (0x0088)
+#define S5P_CEC_TX_BUFF3 (0x008C)
+#define S5P_CEC_TX_BUFF4 (0x0090)
+#define S5P_CEC_TX_BUFF5 (0x0094)
+#define S5P_CEC_TX_BUFF6 (0x0098)
+#define S5P_CEC_TX_BUFF7 (0x009C)
+#define S5P_CEC_TX_BUFF8 (0x00A0)
+#define S5P_CEC_TX_BUFF9 (0x00A4)
+#define S5P_CEC_TX_BUFF10 (0x00A8)
+#define S5P_CEC_TX_BUFF11 (0x00AC)
+#define S5P_CEC_TX_BUFF12 (0x00B0)
+#define S5P_CEC_TX_BUFF13 (0x00B4)
+#define S5P_CEC_TX_BUFF14 (0x00B8)
+#define S5P_CEC_TX_BUFF15 (0x00BC)
+
+#define S5P_CEC_RX_CTRL (0x00C0)
+#define S5P_CEC_RX_STAT0 (0x00E0)
+#define S5P_CEC_RX_STAT1 (0x00E4)
+#define S5P_CEC_RX_BUFF0 (0x0100)
+#define S5P_CEC_RX_BUFF1 (0x0104)
+#define S5P_CEC_RX_BUFF2 (0x0108)
+#define S5P_CEC_RX_BUFF3 (0x010C)
+#define S5P_CEC_RX_BUFF4 (0x0110)
+#define S5P_CEC_RX_BUFF5 (0x0114)
+#define S5P_CEC_RX_BUFF6 (0x0118)
+#define S5P_CEC_RX_BUFF7 (0x011C)
+#define S5P_CEC_RX_BUFF8 (0x0120)
+#define S5P_CEC_RX_BUFF9 (0x0124)
+#define S5P_CEC_RX_BUFF10 (0x0128)
+#define S5P_CEC_RX_BUFF11 (0x012C)
+#define S5P_CEC_RX_BUFF12 (0x0130)
+#define S5P_CEC_RX_BUFF13 (0x0134)
+#define S5P_CEC_RX_BUFF14 (0x0138)
+#define S5P_CEC_RX_BUFF15 (0x013C)
+
+#define S5P_CEC_RX_FILTER_CTRL (0x0180)
+#define S5P_CEC_RX_FILTER_TH (0x0184)
+
+/*
+ * Bit definition part
+ */
+#define S5P_CEC_IRQ_TX_DONE (1<<0)
+#define S5P_CEC_IRQ_TX_ERROR (1<<1)
+#define S5P_CEC_IRQ_RX_DONE (1<<4)
+#define S5P_CEC_IRQ_RX_ERROR (1<<5)
+
+#define S5P_CEC_TX_CTRL_START (1<<0)
+#define S5P_CEC_TX_CTRL_BCAST (1<<1)
+#define S5P_CEC_TX_CTRL_RETRY (0x04<<4)
+#define S5P_CEC_TX_CTRL_RESET (1<<7)
+
+#define S5P_CEC_RX_CTRL_ENABLE (1<<0)
+#define S5P_CEC_RX_CTRL_RESET (1<<7)
+
+#define S5P_CEC_LOGIC_ADDR_MASK (0xF)
+
+/* PMU Registers for PHY */
+#define EXYNOS_HDMI_PHY_CONTROL 0x700
+
+#endif /* __EXYNOS_REGS__H */
diff --git a/drivers/media/cec/platform/s5p/s5p_cec.c b/drivers/media/cec/platform/s5p/s5p_cec.c
new file mode 100644
index 000000000..0a30e7acd
--- /dev/null
+++ b/drivers/media/cec/platform/s5p/s5p_cec.c
@@ -0,0 +1,310 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* drivers/media/platform/s5p-cec/s5p_cec.c
+ *
+ * Samsung S5P CEC driver
+ *
+ * Copyright (c) 2014 Samsung Electronics Co., Ltd.
+ *
+ * This driver is based on the "cec interface driver for exynos soc" by
+ * SangPil Moon.
+ */
+
+#include <linux/clk.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/timer.h>
+#include <linux/workqueue.h>
+#include <media/cec.h>
+#include <media/cec-notifier.h>
+
+#include "exynos_hdmi_cec.h"
+#include "regs-cec.h"
+#include "s5p_cec.h"
+
+#define CEC_NAME "s5p-cec"
+
+static int debug;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "debug level (0-2)");
+
+static int s5p_cec_adap_enable(struct cec_adapter *adap, bool enable)
+{
+ int ret;
+ struct s5p_cec_dev *cec = cec_get_drvdata(adap);
+
+ if (enable) {
+ ret = pm_runtime_resume_and_get(cec->dev);
+ if (ret < 0)
+ return ret;
+
+ s5p_cec_reset(cec);
+
+ s5p_cec_set_divider(cec);
+ s5p_cec_threshold(cec);
+
+ s5p_cec_unmask_tx_interrupts(cec);
+ s5p_cec_unmask_rx_interrupts(cec);
+ s5p_cec_enable_rx(cec);
+ } else {
+ s5p_cec_mask_tx_interrupts(cec);
+ s5p_cec_mask_rx_interrupts(cec);
+ pm_runtime_put(cec->dev);
+ }
+
+ return 0;
+}
+
+static int s5p_cec_adap_log_addr(struct cec_adapter *adap, u8 addr)
+{
+ struct s5p_cec_dev *cec = cec_get_drvdata(adap);
+
+ s5p_cec_set_addr(cec, addr);
+ return 0;
+}
+
+static int s5p_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
+ u32 signal_free_time, struct cec_msg *msg)
+{
+ struct s5p_cec_dev *cec = cec_get_drvdata(adap);
+
+ /*
+ * Unclear if 0 retries are allowed by the hardware, so have 1 as
+ * the minimum.
+ */
+ s5p_cec_copy_packet(cec, msg->msg, msg->len, max(1, attempts - 1));
+ return 0;
+}
+
+static irqreturn_t s5p_cec_irq_handler(int irq, void *priv)
+{
+ struct s5p_cec_dev *cec = priv;
+ u32 status = 0;
+
+ status = s5p_cec_get_status(cec);
+
+ dev_dbg(cec->dev, "irq received\n");
+
+ if (status & CEC_STATUS_TX_DONE) {
+ if (status & CEC_STATUS_TX_NACK) {
+ dev_dbg(cec->dev, "CEC_STATUS_TX_NACK set\n");
+ cec->tx = STATE_NACK;
+ } else if (status & CEC_STATUS_TX_ERROR) {
+ dev_dbg(cec->dev, "CEC_STATUS_TX_ERROR set\n");
+ cec->tx = STATE_ERROR;
+ } else {
+ dev_dbg(cec->dev, "CEC_STATUS_TX_DONE\n");
+ cec->tx = STATE_DONE;
+ }
+ s5p_clr_pending_tx(cec);
+ }
+
+ if (status & CEC_STATUS_RX_DONE) {
+ if (status & CEC_STATUS_RX_ERROR) {
+ dev_dbg(cec->dev, "CEC_STATUS_RX_ERROR set\n");
+ s5p_cec_rx_reset(cec);
+ s5p_cec_enable_rx(cec);
+ } else {
+ dev_dbg(cec->dev, "CEC_STATUS_RX_DONE set\n");
+ if (cec->rx != STATE_IDLE)
+ dev_dbg(cec->dev, "Buffer overrun (worker did not process previous message)\n");
+ cec->rx = STATE_BUSY;
+ cec->msg.len = status >> 24;
+ if (cec->msg.len > CEC_MAX_MSG_SIZE)
+ cec->msg.len = CEC_MAX_MSG_SIZE;
+ cec->msg.rx_status = CEC_RX_STATUS_OK;
+ s5p_cec_get_rx_buf(cec, cec->msg.len,
+ cec->msg.msg);
+ cec->rx = STATE_DONE;
+ s5p_cec_enable_rx(cec);
+ }
+ /* Clear interrupt pending bit */
+ s5p_clr_pending_rx(cec);
+ }
+ return IRQ_WAKE_THREAD;
+}
+
+static irqreturn_t s5p_cec_irq_handler_thread(int irq, void *priv)
+{
+ struct s5p_cec_dev *cec = priv;
+
+ dev_dbg(cec->dev, "irq processing thread\n");
+ switch (cec->tx) {
+ case STATE_DONE:
+ cec_transmit_done(cec->adap, CEC_TX_STATUS_OK, 0, 0, 0, 0);
+ cec->tx = STATE_IDLE;
+ break;
+ case STATE_NACK:
+ cec_transmit_done(cec->adap,
+ CEC_TX_STATUS_MAX_RETRIES | CEC_TX_STATUS_NACK,
+ 0, 1, 0, 0);
+ cec->tx = STATE_IDLE;
+ break;
+ case STATE_ERROR:
+ cec_transmit_done(cec->adap,
+ CEC_TX_STATUS_MAX_RETRIES | CEC_TX_STATUS_ERROR,
+ 0, 0, 0, 1);
+ cec->tx = STATE_IDLE;
+ break;
+ case STATE_BUSY:
+ dev_err(cec->dev, "state set to busy, this should not occur here\n");
+ break;
+ default:
+ break;
+ }
+
+ switch (cec->rx) {
+ case STATE_DONE:
+ cec_received_msg(cec->adap, &cec->msg);
+ cec->rx = STATE_IDLE;
+ break;
+ default:
+ break;
+ }
+
+ return IRQ_HANDLED;
+}
+
+static const struct cec_adap_ops s5p_cec_adap_ops = {
+ .adap_enable = s5p_cec_adap_enable,
+ .adap_log_addr = s5p_cec_adap_log_addr,
+ .adap_transmit = s5p_cec_adap_transmit,
+};
+
+static int s5p_cec_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device *hdmi_dev;
+ struct s5p_cec_dev *cec;
+ bool needs_hpd = of_property_read_bool(pdev->dev.of_node, "needs-hpd");
+ int ret;
+
+ hdmi_dev = cec_notifier_parse_hdmi_phandle(dev);
+
+ if (IS_ERR(hdmi_dev))
+ return PTR_ERR(hdmi_dev);
+
+ cec = devm_kzalloc(&pdev->dev, sizeof(*cec), GFP_KERNEL);
+ if (!cec)
+ return -ENOMEM;
+
+ cec->dev = dev;
+
+ cec->irq = platform_get_irq(pdev, 0);
+ if (cec->irq < 0)
+ return cec->irq;
+
+ ret = devm_request_threaded_irq(dev, cec->irq, s5p_cec_irq_handler,
+ s5p_cec_irq_handler_thread, 0, pdev->name, cec);
+ if (ret)
+ return ret;
+
+ cec->clk = devm_clk_get(dev, "hdmicec");
+ if (IS_ERR(cec->clk))
+ return PTR_ERR(cec->clk);
+
+ cec->pmu = syscon_regmap_lookup_by_phandle(dev->of_node,
+ "samsung,syscon-phandle");
+ if (IS_ERR(cec->pmu))
+ return -EPROBE_DEFER;
+
+ cec->reg = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(cec->reg))
+ return PTR_ERR(cec->reg);
+
+ cec->adap = cec_allocate_adapter(&s5p_cec_adap_ops, cec, CEC_NAME,
+ CEC_CAP_DEFAULTS | (needs_hpd ? CEC_CAP_NEEDS_HPD : 0) |
+ CEC_CAP_CONNECTOR_INFO, 1);
+ ret = PTR_ERR_OR_ZERO(cec->adap);
+ if (ret)
+ return ret;
+
+ cec->notifier = cec_notifier_cec_adap_register(hdmi_dev, NULL,
+ cec->adap);
+ if (!cec->notifier) {
+ ret = -ENOMEM;
+ goto err_delete_adapter;
+ }
+
+ ret = cec_register_adapter(cec->adap, &pdev->dev);
+ if (ret)
+ goto err_notifier;
+
+ platform_set_drvdata(pdev, cec);
+ pm_runtime_enable(dev);
+
+ dev_dbg(dev, "successfully probed\n");
+ return 0;
+
+err_notifier:
+ cec_notifier_cec_adap_unregister(cec->notifier, cec->adap);
+
+err_delete_adapter:
+ cec_delete_adapter(cec->adap);
+ return ret;
+}
+
+static int s5p_cec_remove(struct platform_device *pdev)
+{
+ struct s5p_cec_dev *cec = platform_get_drvdata(pdev);
+
+ cec_notifier_cec_adap_unregister(cec->notifier, cec->adap);
+ cec_unregister_adapter(cec->adap);
+ pm_runtime_disable(&pdev->dev);
+ return 0;
+}
+
+static int __maybe_unused s5p_cec_runtime_suspend(struct device *dev)
+{
+ struct s5p_cec_dev *cec = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(cec->clk);
+ return 0;
+}
+
+static int __maybe_unused s5p_cec_runtime_resume(struct device *dev)
+{
+ struct s5p_cec_dev *cec = dev_get_drvdata(dev);
+ int ret;
+
+ ret = clk_prepare_enable(cec->clk);
+ if (ret < 0)
+ return ret;
+ return 0;
+}
+
+static const struct dev_pm_ops s5p_cec_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
+ SET_RUNTIME_PM_OPS(s5p_cec_runtime_suspend, s5p_cec_runtime_resume,
+ NULL)
+};
+
+static const struct of_device_id s5p_cec_match[] = {
+ {
+ .compatible = "samsung,s5p-cec",
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, s5p_cec_match);
+
+static struct platform_driver s5p_cec_pdrv = {
+ .probe = s5p_cec_probe,
+ .remove = s5p_cec_remove,
+ .driver = {
+ .name = CEC_NAME,
+ .of_match_table = s5p_cec_match,
+ .pm = &s5p_cec_pm_ops,
+ },
+};
+
+module_platform_driver(s5p_cec_pdrv);
+
+MODULE_AUTHOR("Kamil Debski <kamil@wypas.org>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Samsung S5P CEC driver");
diff --git a/drivers/media/cec/platform/s5p/s5p_cec.h b/drivers/media/cec/platform/s5p/s5p_cec.h
new file mode 100644
index 000000000..34d033b20
--- /dev/null
+++ b/drivers/media/cec/platform/s5p/s5p_cec.h
@@ -0,0 +1,76 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* drivers/media/platform/s5p-cec/s5p_cec.h
+ *
+ * Samsung S5P HDMI CEC driver
+ *
+ * Copyright (c) 2014 Samsung Electronics Co., Ltd.
+ */
+
+#ifndef _S5P_CEC_H_
+#define _S5P_CEC_H_ __FILE__
+
+#include <linux/clk.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/timer.h>
+#include <linux/workqueue.h>
+#include <media/cec.h>
+
+#include "exynos_hdmi_cec.h"
+#include "regs-cec.h"
+#include "s5p_cec.h"
+
+#define CEC_NAME "s5p-cec"
+
+#define CEC_STATUS_TX_RUNNING (1 << 0)
+#define CEC_STATUS_TX_TRANSFERRING (1 << 1)
+#define CEC_STATUS_TX_DONE (1 << 2)
+#define CEC_STATUS_TX_ERROR (1 << 3)
+#define CEC_STATUS_TX_NACK (1 << 4)
+#define CEC_STATUS_TX_BYTES (0xFF << 8)
+#define CEC_STATUS_RX_RUNNING (1 << 16)
+#define CEC_STATUS_RX_RECEIVING (1 << 17)
+#define CEC_STATUS_RX_DONE (1 << 18)
+#define CEC_STATUS_RX_ERROR (1 << 19)
+#define CEC_STATUS_RX_BCAST (1 << 20)
+#define CEC_STATUS_RX_BYTES (0xFF << 24)
+
+#define CEC_WORKER_TX_DONE (1 << 0)
+#define CEC_WORKER_RX_MSG (1 << 1)
+
+/* CEC Rx buffer size */
+#define CEC_RX_BUFF_SIZE 16
+/* CEC Tx buffer size */
+#define CEC_TX_BUFF_SIZE 16
+
+enum cec_state {
+ STATE_IDLE,
+ STATE_BUSY,
+ STATE_DONE,
+ STATE_NACK,
+ STATE_ERROR
+};
+
+struct cec_notifier;
+
+struct s5p_cec_dev {
+ struct cec_adapter *adap;
+ struct clk *clk;
+ struct device *dev;
+ struct mutex lock;
+ struct regmap *pmu;
+ struct cec_notifier *notifier;
+ int irq;
+ void __iomem *reg;
+
+ enum cec_state rx;
+ enum cec_state tx;
+ struct cec_msg msg;
+};
+
+#endif /* _S5P_CEC_H_ */