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-rw-r--r--drivers/media/cec/usb/Kconfig8
-rw-r--r--drivers/media/cec/usb/Makefile6
-rw-r--r--drivers/media/cec/usb/pulse8/Kconfig13
-rw-r--r--drivers/media/cec/usb/pulse8/Makefile2
-rw-r--r--drivers/media/cec/usb/pulse8/pulse8-cec.c924
-rw-r--r--drivers/media/cec/usb/rainshadow/Kconfig13
-rw-r--r--drivers/media/cec/usb/rainshadow/Makefile2
-rw-r--r--drivers/media/cec/usb/rainshadow/rainshadow-cec.c380
8 files changed, 1348 insertions, 0 deletions
diff --git a/drivers/media/cec/usb/Kconfig b/drivers/media/cec/usb/Kconfig
new file mode 100644
index 0000000000..3f3a5c7528
--- /dev/null
+++ b/drivers/media/cec/usb/Kconfig
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# USB drivers
+
+if USB_SUPPORT && TTY
+source "drivers/media/cec/usb/pulse8/Kconfig"
+source "drivers/media/cec/usb/rainshadow/Kconfig"
+endif
diff --git a/drivers/media/cec/usb/Makefile b/drivers/media/cec/usb/Makefile
new file mode 100644
index 0000000000..e4183d1bfa
--- /dev/null
+++ b/drivers/media/cec/usb/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the CEC USB device drivers.
+#
+obj-$(CONFIG_USB_PULSE8_CEC) += pulse8/
+obj-$(CONFIG_USB_RAINSHADOW_CEC) += rainshadow/
diff --git a/drivers/media/cec/usb/pulse8/Kconfig b/drivers/media/cec/usb/pulse8/Kconfig
new file mode 100644
index 0000000000..a0224ef80e
--- /dev/null
+++ b/drivers/media/cec/usb/pulse8/Kconfig
@@ -0,0 +1,13 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config USB_PULSE8_CEC
+ tristate "Pulse Eight HDMI CEC"
+ select CEC_CORE
+ select USB
+ select USB_ACM
+ select SERIO
+ select SERIO_SERPORT
+ help
+ This is a cec driver for the Pulse Eight HDMI CEC device.
+
+ To compile this driver as a module, choose M here: the
+ module will be called pulse8-cec.
diff --git a/drivers/media/cec/usb/pulse8/Makefile b/drivers/media/cec/usb/pulse8/Makefile
new file mode 100644
index 0000000000..7816c68bf9
--- /dev/null
+++ b/drivers/media/cec/usb/pulse8/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+obj-$(CONFIG_USB_PULSE8_CEC) += pulse8-cec.o
diff --git a/drivers/media/cec/usb/pulse8/pulse8-cec.c b/drivers/media/cec/usb/pulse8/pulse8-cec.c
new file mode 100644
index 0000000000..ba67587bd4
--- /dev/null
+++ b/drivers/media/cec/usb/pulse8/pulse8-cec.c
@@ -0,0 +1,924 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Pulse Eight HDMI CEC driver
+ *
+ * Copyright 2016 Hans Verkuil <hverkuil@xs4all.nl
+ */
+
+/*
+ * Notes:
+ *
+ * - Devices with firmware version < 2 do not store their configuration in
+ * EEPROM.
+ *
+ * - In autonomous mode, only messages from a TV will be acknowledged, even
+ * polling messages. Upon receiving a message from a TV, the dongle will
+ * respond to messages from any logical address.
+ *
+ * - In autonomous mode, the dongle will by default reply Feature Abort
+ * [Unrecognized Opcode] when it receives Give Device Vendor ID. It will
+ * however observe vendor ID's reported by other devices and possibly
+ * alter this behavior. When TV's (and TV's only) report that their vendor ID
+ * is LG (0x00e091), the dongle will itself reply that it has the same vendor
+ * ID, and it will respond to at least one vendor specific command.
+ *
+ * - In autonomous mode, the dongle is known to attempt wakeup if it receives
+ * <User Control Pressed> ["Power On"], ["Power] or ["Power Toggle"], or if it
+ * receives <Set Stream Path> with its own physical address. It also does this
+ * if it receives <Vendor Specific Command> [0x03 0x00] from an LG TV.
+ */
+
+#include <linux/completion.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/workqueue.h>
+#include <linux/serio.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+#include <linux/delay.h>
+
+#include <media/cec.h>
+
+MODULE_AUTHOR("Hans Verkuil <hverkuil@xs4all.nl>");
+MODULE_DESCRIPTION("Pulse Eight HDMI CEC driver");
+MODULE_LICENSE("GPL");
+
+static int debug;
+static int persistent_config;
+module_param(debug, int, 0644);
+module_param(persistent_config, int, 0644);
+MODULE_PARM_DESC(debug, "debug level (0-2)");
+MODULE_PARM_DESC(persistent_config, "read config from persistent memory (0-1)");
+
+enum pulse8_msgcodes {
+ MSGCODE_NOTHING = 0,
+ MSGCODE_PING,
+ MSGCODE_TIMEOUT_ERROR,
+ MSGCODE_HIGH_ERROR,
+ MSGCODE_LOW_ERROR,
+ MSGCODE_FRAME_START,
+ MSGCODE_FRAME_DATA,
+ MSGCODE_RECEIVE_FAILED,
+ MSGCODE_COMMAND_ACCEPTED, /* 0x08 */
+ MSGCODE_COMMAND_REJECTED,
+ MSGCODE_SET_ACK_MASK,
+ MSGCODE_TRANSMIT,
+ MSGCODE_TRANSMIT_EOM,
+ MSGCODE_TRANSMIT_IDLETIME,
+ MSGCODE_TRANSMIT_ACK_POLARITY,
+ MSGCODE_TRANSMIT_LINE_TIMEOUT,
+ MSGCODE_TRANSMIT_SUCCEEDED, /* 0x10 */
+ MSGCODE_TRANSMIT_FAILED_LINE,
+ MSGCODE_TRANSMIT_FAILED_ACK,
+ MSGCODE_TRANSMIT_FAILED_TIMEOUT_DATA,
+ MSGCODE_TRANSMIT_FAILED_TIMEOUT_LINE,
+ MSGCODE_FIRMWARE_VERSION,
+ MSGCODE_START_BOOTLOADER,
+ MSGCODE_GET_BUILDDATE,
+ MSGCODE_SET_CONTROLLED, /* 0x18 */
+ MSGCODE_GET_AUTO_ENABLED,
+ MSGCODE_SET_AUTO_ENABLED,
+ MSGCODE_GET_DEFAULT_LOGICAL_ADDRESS,
+ MSGCODE_SET_DEFAULT_LOGICAL_ADDRESS,
+ MSGCODE_GET_LOGICAL_ADDRESS_MASK,
+ MSGCODE_SET_LOGICAL_ADDRESS_MASK,
+ MSGCODE_GET_PHYSICAL_ADDRESS,
+ MSGCODE_SET_PHYSICAL_ADDRESS, /* 0x20 */
+ MSGCODE_GET_DEVICE_TYPE,
+ MSGCODE_SET_DEVICE_TYPE,
+ MSGCODE_GET_HDMI_VERSION, /* Removed in FW >= 10 */
+ MSGCODE_SET_HDMI_VERSION,
+ MSGCODE_GET_OSD_NAME,
+ MSGCODE_SET_OSD_NAME,
+ MSGCODE_WRITE_EEPROM,
+ MSGCODE_GET_ADAPTER_TYPE, /* 0x28 */
+ MSGCODE_SET_ACTIVE_SOURCE,
+ MSGCODE_GET_AUTO_POWER_ON, /* New for FW >= 10 */
+ MSGCODE_SET_AUTO_POWER_ON,
+
+ MSGCODE_FRAME_EOM = 0x80,
+ MSGCODE_FRAME_ACK = 0x40,
+};
+
+static const char * const pulse8_msgnames[] = {
+ "NOTHING",
+ "PING",
+ "TIMEOUT_ERROR",
+ "HIGH_ERROR",
+ "LOW_ERROR",
+ "FRAME_START",
+ "FRAME_DATA",
+ "RECEIVE_FAILED",
+ "COMMAND_ACCEPTED",
+ "COMMAND_REJECTED",
+ "SET_ACK_MASK",
+ "TRANSMIT",
+ "TRANSMIT_EOM",
+ "TRANSMIT_IDLETIME",
+ "TRANSMIT_ACK_POLARITY",
+ "TRANSMIT_LINE_TIMEOUT",
+ "TRANSMIT_SUCCEEDED",
+ "TRANSMIT_FAILED_LINE",
+ "TRANSMIT_FAILED_ACK",
+ "TRANSMIT_FAILED_TIMEOUT_DATA",
+ "TRANSMIT_FAILED_TIMEOUT_LINE",
+ "FIRMWARE_VERSION",
+ "START_BOOTLOADER",
+ "GET_BUILDDATE",
+ "SET_CONTROLLED",
+ "GET_AUTO_ENABLED",
+ "SET_AUTO_ENABLED",
+ "GET_DEFAULT_LOGICAL_ADDRESS",
+ "SET_DEFAULT_LOGICAL_ADDRESS",
+ "GET_LOGICAL_ADDRESS_MASK",
+ "SET_LOGICAL_ADDRESS_MASK",
+ "GET_PHYSICAL_ADDRESS",
+ "SET_PHYSICAL_ADDRESS",
+ "GET_DEVICE_TYPE",
+ "SET_DEVICE_TYPE",
+ "GET_HDMI_VERSION",
+ "SET_HDMI_VERSION",
+ "GET_OSD_NAME",
+ "SET_OSD_NAME",
+ "WRITE_EEPROM",
+ "GET_ADAPTER_TYPE",
+ "SET_ACTIVE_SOURCE",
+ "GET_AUTO_POWER_ON",
+ "SET_AUTO_POWER_ON",
+};
+
+static const char *pulse8_msgname(u8 cmd)
+{
+ static char unknown_msg[5];
+
+ if ((cmd & 0x3f) < ARRAY_SIZE(pulse8_msgnames))
+ return pulse8_msgnames[cmd & 0x3f];
+ snprintf(unknown_msg, sizeof(unknown_msg), "0x%02x", cmd);
+ return unknown_msg;
+}
+
+#define MSGSTART 0xff
+#define MSGEND 0xfe
+#define MSGESC 0xfd
+#define MSGOFFSET 3
+
+#define DATA_SIZE 256
+
+#define PING_PERIOD (15 * HZ)
+
+#define NUM_MSGS 8
+
+struct pulse8 {
+ struct device *dev;
+ struct serio *serio;
+ struct cec_adapter *adap;
+ unsigned int vers;
+
+ struct delayed_work ping_eeprom_work;
+
+ struct work_struct irq_work;
+ struct cec_msg rx_msg[NUM_MSGS];
+ unsigned int rx_msg_cur_idx, rx_msg_num;
+ /* protect rx_msg_cur_idx and rx_msg_num */
+ spinlock_t msg_lock;
+ u8 new_rx_msg[CEC_MAX_MSG_SIZE];
+ u8 new_rx_msg_len;
+
+ struct work_struct tx_work;
+ u32 tx_done_status;
+ u32 tx_signal_free_time;
+ struct cec_msg tx_msg;
+ bool tx_msg_is_bcast;
+
+ struct completion cmd_done;
+ u8 data[DATA_SIZE];
+ unsigned int len;
+ u8 buf[DATA_SIZE];
+ unsigned int idx;
+ bool escape;
+ bool started;
+
+ /* locks access to the adapter */
+ struct mutex lock;
+ bool config_pending;
+ bool restoring_config;
+ bool autonomous;
+};
+
+static int pulse8_send(struct serio *serio, const u8 *command, u8 cmd_len)
+{
+ int err = 0;
+
+ err = serio_write(serio, MSGSTART);
+ if (err)
+ return err;
+ for (; !err && cmd_len; command++, cmd_len--) {
+ if (*command >= MSGESC) {
+ err = serio_write(serio, MSGESC);
+ if (!err)
+ err = serio_write(serio, *command - MSGOFFSET);
+ } else {
+ err = serio_write(serio, *command);
+ }
+ }
+ if (!err)
+ err = serio_write(serio, MSGEND);
+
+ return err;
+}
+
+static int pulse8_send_and_wait_once(struct pulse8 *pulse8,
+ const u8 *cmd, u8 cmd_len,
+ u8 response, u8 size)
+{
+ int err;
+
+ if (debug > 1)
+ dev_info(pulse8->dev, "transmit %s: %*ph\n",
+ pulse8_msgname(cmd[0]), cmd_len, cmd);
+ init_completion(&pulse8->cmd_done);
+
+ err = pulse8_send(pulse8->serio, cmd, cmd_len);
+ if (err)
+ return err;
+
+ if (!wait_for_completion_timeout(&pulse8->cmd_done, HZ))
+ return -ETIMEDOUT;
+ if ((pulse8->data[0] & 0x3f) == MSGCODE_COMMAND_REJECTED &&
+ cmd[0] != MSGCODE_SET_CONTROLLED &&
+ cmd[0] != MSGCODE_SET_AUTO_ENABLED &&
+ cmd[0] != MSGCODE_GET_BUILDDATE)
+ return -ENOTTY;
+ if (response &&
+ ((pulse8->data[0] & 0x3f) != response || pulse8->len < size + 1)) {
+ dev_info(pulse8->dev, "transmit %s failed with %s\n",
+ pulse8_msgname(cmd[0]),
+ pulse8_msgname(pulse8->data[0]));
+ return -EIO;
+ }
+ return 0;
+}
+
+static int pulse8_send_and_wait(struct pulse8 *pulse8,
+ const u8 *cmd, u8 cmd_len, u8 response, u8 size)
+{
+ u8 cmd_sc[2];
+ int err;
+
+ err = pulse8_send_and_wait_once(pulse8, cmd, cmd_len, response, size);
+ if (err != -ENOTTY)
+ return err;
+
+ cmd_sc[0] = MSGCODE_SET_CONTROLLED;
+ cmd_sc[1] = 1;
+ err = pulse8_send_and_wait_once(pulse8, cmd_sc, 2,
+ MSGCODE_COMMAND_ACCEPTED, 1);
+ if (!err)
+ err = pulse8_send_and_wait_once(pulse8, cmd, cmd_len,
+ response, size);
+ return err == -ENOTTY ? -EIO : err;
+}
+
+static void pulse8_tx_work_handler(struct work_struct *work)
+{
+ struct pulse8 *pulse8 = container_of(work, struct pulse8, tx_work);
+ struct cec_msg *msg = &pulse8->tx_msg;
+ unsigned int i;
+ u8 cmd[2];
+ int err;
+
+ if (msg->len == 0)
+ return;
+
+ mutex_lock(&pulse8->lock);
+ cmd[0] = MSGCODE_TRANSMIT_IDLETIME;
+ cmd[1] = pulse8->tx_signal_free_time;
+ err = pulse8_send_and_wait(pulse8, cmd, 2,
+ MSGCODE_COMMAND_ACCEPTED, 1);
+ cmd[0] = MSGCODE_TRANSMIT_ACK_POLARITY;
+ cmd[1] = cec_msg_is_broadcast(msg);
+ pulse8->tx_msg_is_bcast = cec_msg_is_broadcast(msg);
+ if (!err)
+ err = pulse8_send_and_wait(pulse8, cmd, 2,
+ MSGCODE_COMMAND_ACCEPTED, 1);
+ cmd[0] = msg->len == 1 ? MSGCODE_TRANSMIT_EOM : MSGCODE_TRANSMIT;
+ cmd[1] = msg->msg[0];
+ if (!err)
+ err = pulse8_send_and_wait(pulse8, cmd, 2,
+ MSGCODE_COMMAND_ACCEPTED, 1);
+ if (!err && msg->len > 1) {
+ for (i = 1; !err && i < msg->len; i++) {
+ cmd[0] = ((i == msg->len - 1)) ?
+ MSGCODE_TRANSMIT_EOM : MSGCODE_TRANSMIT;
+ cmd[1] = msg->msg[i];
+ err = pulse8_send_and_wait(pulse8, cmd, 2,
+ MSGCODE_COMMAND_ACCEPTED, 1);
+ }
+ }
+ if (err && debug)
+ dev_info(pulse8->dev, "%s(0x%02x) failed with error %d for msg %*ph\n",
+ pulse8_msgname(cmd[0]), cmd[1],
+ err, msg->len, msg->msg);
+ msg->len = 0;
+ mutex_unlock(&pulse8->lock);
+ if (err)
+ cec_transmit_attempt_done(pulse8->adap, CEC_TX_STATUS_ERROR);
+}
+
+static void pulse8_irq_work_handler(struct work_struct *work)
+{
+ struct pulse8 *pulse8 =
+ container_of(work, struct pulse8, irq_work);
+ unsigned long flags;
+ u32 status;
+
+ spin_lock_irqsave(&pulse8->msg_lock, flags);
+ while (pulse8->rx_msg_num) {
+ spin_unlock_irqrestore(&pulse8->msg_lock, flags);
+ if (debug)
+ dev_info(pulse8->dev, "adap received %*ph\n",
+ pulse8->rx_msg[pulse8->rx_msg_cur_idx].len,
+ pulse8->rx_msg[pulse8->rx_msg_cur_idx].msg);
+ cec_received_msg(pulse8->adap,
+ &pulse8->rx_msg[pulse8->rx_msg_cur_idx]);
+ spin_lock_irqsave(&pulse8->msg_lock, flags);
+ if (pulse8->rx_msg_num)
+ pulse8->rx_msg_num--;
+ pulse8->rx_msg_cur_idx =
+ (pulse8->rx_msg_cur_idx + 1) % NUM_MSGS;
+ }
+ spin_unlock_irqrestore(&pulse8->msg_lock, flags);
+
+ mutex_lock(&pulse8->lock);
+ status = pulse8->tx_done_status;
+ pulse8->tx_done_status = 0;
+ mutex_unlock(&pulse8->lock);
+ if (status)
+ cec_transmit_attempt_done(pulse8->adap, status);
+}
+
+static irqreturn_t pulse8_interrupt(struct serio *serio, unsigned char data,
+ unsigned int flags)
+{
+ struct pulse8 *pulse8 = serio_get_drvdata(serio);
+ unsigned long irq_flags;
+ unsigned int idx;
+
+ if (!pulse8->started && data != MSGSTART)
+ return IRQ_HANDLED;
+ if (data == MSGESC) {
+ pulse8->escape = true;
+ return IRQ_HANDLED;
+ }
+ if (pulse8->escape) {
+ data += MSGOFFSET;
+ pulse8->escape = false;
+ } else if (data == MSGEND) {
+ u8 msgcode = pulse8->buf[0];
+
+ if (debug > 1)
+ dev_info(pulse8->dev, "received %s: %*ph\n",
+ pulse8_msgname(msgcode),
+ pulse8->idx, pulse8->buf);
+ switch (msgcode & 0x3f) {
+ case MSGCODE_FRAME_START:
+ /*
+ * Test if we are receiving a new msg when a previous
+ * message is still pending.
+ */
+ if (!(msgcode & MSGCODE_FRAME_EOM)) {
+ pulse8->new_rx_msg_len = 1;
+ pulse8->new_rx_msg[0] = pulse8->buf[1];
+ break;
+ }
+ fallthrough;
+ case MSGCODE_FRAME_DATA:
+ if (pulse8->new_rx_msg_len < CEC_MAX_MSG_SIZE)
+ pulse8->new_rx_msg[pulse8->new_rx_msg_len++] =
+ pulse8->buf[1];
+ if (!(msgcode & MSGCODE_FRAME_EOM))
+ break;
+
+ spin_lock_irqsave(&pulse8->msg_lock, irq_flags);
+ idx = (pulse8->rx_msg_cur_idx + pulse8->rx_msg_num) %
+ NUM_MSGS;
+ if (pulse8->rx_msg_num == NUM_MSGS) {
+ dev_warn(pulse8->dev,
+ "message queue is full, dropping %*ph\n",
+ pulse8->new_rx_msg_len,
+ pulse8->new_rx_msg);
+ spin_unlock_irqrestore(&pulse8->msg_lock,
+ irq_flags);
+ pulse8->new_rx_msg_len = 0;
+ break;
+ }
+ pulse8->rx_msg_num++;
+ memcpy(pulse8->rx_msg[idx].msg, pulse8->new_rx_msg,
+ pulse8->new_rx_msg_len);
+ pulse8->rx_msg[idx].len = pulse8->new_rx_msg_len;
+ spin_unlock_irqrestore(&pulse8->msg_lock, irq_flags);
+ schedule_work(&pulse8->irq_work);
+ pulse8->new_rx_msg_len = 0;
+ break;
+ case MSGCODE_TRANSMIT_SUCCEEDED:
+ WARN_ON(pulse8->tx_done_status);
+ pulse8->tx_done_status = CEC_TX_STATUS_OK;
+ schedule_work(&pulse8->irq_work);
+ break;
+ case MSGCODE_TRANSMIT_FAILED_ACK:
+ /*
+ * A NACK for a broadcast message makes no sense, these
+ * seem to be spurious messages and are skipped.
+ */
+ if (pulse8->tx_msg_is_bcast)
+ break;
+ WARN_ON(pulse8->tx_done_status);
+ pulse8->tx_done_status = CEC_TX_STATUS_NACK;
+ schedule_work(&pulse8->irq_work);
+ break;
+ case MSGCODE_TRANSMIT_FAILED_LINE:
+ case MSGCODE_TRANSMIT_FAILED_TIMEOUT_DATA:
+ case MSGCODE_TRANSMIT_FAILED_TIMEOUT_LINE:
+ WARN_ON(pulse8->tx_done_status);
+ pulse8->tx_done_status = CEC_TX_STATUS_ERROR;
+ schedule_work(&pulse8->irq_work);
+ break;
+ case MSGCODE_HIGH_ERROR:
+ case MSGCODE_LOW_ERROR:
+ case MSGCODE_RECEIVE_FAILED:
+ case MSGCODE_TIMEOUT_ERROR:
+ pulse8->new_rx_msg_len = 0;
+ break;
+ case MSGCODE_COMMAND_ACCEPTED:
+ case MSGCODE_COMMAND_REJECTED:
+ default:
+ if (pulse8->idx == 0)
+ break;
+ memcpy(pulse8->data, pulse8->buf, pulse8->idx);
+ pulse8->len = pulse8->idx;
+ complete(&pulse8->cmd_done);
+ break;
+ }
+ pulse8->idx = 0;
+ pulse8->started = false;
+ return IRQ_HANDLED;
+ } else if (data == MSGSTART) {
+ pulse8->idx = 0;
+ pulse8->started = true;
+ return IRQ_HANDLED;
+ }
+
+ if (pulse8->idx >= DATA_SIZE) {
+ dev_dbg(pulse8->dev,
+ "throwing away %d bytes of garbage\n", pulse8->idx);
+ pulse8->idx = 0;
+ }
+ pulse8->buf[pulse8->idx++] = data;
+ return IRQ_HANDLED;
+}
+
+static int pulse8_cec_adap_enable(struct cec_adapter *adap, bool enable)
+{
+ struct pulse8 *pulse8 = cec_get_drvdata(adap);
+ u8 cmd[16];
+ int err;
+
+ mutex_lock(&pulse8->lock);
+ cmd[0] = MSGCODE_SET_CONTROLLED;
+ cmd[1] = enable;
+ err = pulse8_send_and_wait(pulse8, cmd, 2,
+ MSGCODE_COMMAND_ACCEPTED, 1);
+ if (!enable) {
+ pulse8->rx_msg_num = 0;
+ pulse8->tx_done_status = 0;
+ }
+ mutex_unlock(&pulse8->lock);
+ return enable ? err : 0;
+}
+
+static int pulse8_cec_adap_log_addr(struct cec_adapter *adap, u8 log_addr)
+{
+ struct pulse8 *pulse8 = cec_get_drvdata(adap);
+ u16 mask = 0;
+ u16 pa = adap->phys_addr;
+ u8 cmd[16];
+ int err = 0;
+
+ mutex_lock(&pulse8->lock);
+ if (log_addr != CEC_LOG_ADDR_INVALID)
+ mask = 1 << log_addr;
+ cmd[0] = MSGCODE_SET_ACK_MASK;
+ cmd[1] = mask >> 8;
+ cmd[2] = mask & 0xff;
+ err = pulse8_send_and_wait(pulse8, cmd, 3,
+ MSGCODE_COMMAND_ACCEPTED, 0);
+ if ((err && mask != 0) || pulse8->restoring_config)
+ goto unlock;
+
+ cmd[0] = MSGCODE_SET_AUTO_ENABLED;
+ cmd[1] = log_addr == CEC_LOG_ADDR_INVALID ? 0 : 1;
+ err = pulse8_send_and_wait(pulse8, cmd, 2,
+ MSGCODE_COMMAND_ACCEPTED, 0);
+ if (err)
+ goto unlock;
+ pulse8->autonomous = cmd[1];
+ if (log_addr == CEC_LOG_ADDR_INVALID)
+ goto unlock;
+
+ cmd[0] = MSGCODE_SET_DEVICE_TYPE;
+ cmd[1] = adap->log_addrs.primary_device_type[0];
+ err = pulse8_send_and_wait(pulse8, cmd, 2,
+ MSGCODE_COMMAND_ACCEPTED, 0);
+ if (err)
+ goto unlock;
+
+ switch (adap->log_addrs.primary_device_type[0]) {
+ case CEC_OP_PRIM_DEVTYPE_TV:
+ mask = CEC_LOG_ADDR_MASK_TV;
+ break;
+ case CEC_OP_PRIM_DEVTYPE_RECORD:
+ mask = CEC_LOG_ADDR_MASK_RECORD;
+ break;
+ case CEC_OP_PRIM_DEVTYPE_TUNER:
+ mask = CEC_LOG_ADDR_MASK_TUNER;
+ break;
+ case CEC_OP_PRIM_DEVTYPE_PLAYBACK:
+ mask = CEC_LOG_ADDR_MASK_PLAYBACK;
+ break;
+ case CEC_OP_PRIM_DEVTYPE_AUDIOSYSTEM:
+ mask = CEC_LOG_ADDR_MASK_AUDIOSYSTEM;
+ break;
+ case CEC_OP_PRIM_DEVTYPE_SWITCH:
+ mask = CEC_LOG_ADDR_MASK_UNREGISTERED;
+ break;
+ case CEC_OP_PRIM_DEVTYPE_PROCESSOR:
+ mask = CEC_LOG_ADDR_MASK_SPECIFIC;
+ break;
+ default:
+ mask = 0;
+ break;
+ }
+ cmd[0] = MSGCODE_SET_LOGICAL_ADDRESS_MASK;
+ cmd[1] = mask >> 8;
+ cmd[2] = mask & 0xff;
+ err = pulse8_send_and_wait(pulse8, cmd, 3,
+ MSGCODE_COMMAND_ACCEPTED, 0);
+ if (err)
+ goto unlock;
+
+ cmd[0] = MSGCODE_SET_DEFAULT_LOGICAL_ADDRESS;
+ cmd[1] = log_addr;
+ err = pulse8_send_and_wait(pulse8, cmd, 2,
+ MSGCODE_COMMAND_ACCEPTED, 0);
+ if (err)
+ goto unlock;
+
+ cmd[0] = MSGCODE_SET_PHYSICAL_ADDRESS;
+ cmd[1] = pa >> 8;
+ cmd[2] = pa & 0xff;
+ err = pulse8_send_and_wait(pulse8, cmd, 3,
+ MSGCODE_COMMAND_ACCEPTED, 0);
+ if (err)
+ goto unlock;
+
+ if (pulse8->vers < 10) {
+ cmd[0] = MSGCODE_SET_HDMI_VERSION;
+ cmd[1] = adap->log_addrs.cec_version;
+ err = pulse8_send_and_wait(pulse8, cmd, 2,
+ MSGCODE_COMMAND_ACCEPTED, 0);
+ if (err)
+ goto unlock;
+ }
+
+ if (adap->log_addrs.osd_name[0]) {
+ size_t osd_len = strlen(adap->log_addrs.osd_name);
+ char *osd_str = cmd + 1;
+
+ cmd[0] = MSGCODE_SET_OSD_NAME;
+ strscpy(cmd + 1, adap->log_addrs.osd_name, sizeof(cmd) - 1);
+ if (osd_len < 4) {
+ memset(osd_str + osd_len, ' ', 4 - osd_len);
+ osd_len = 4;
+ osd_str[osd_len] = '\0';
+ strscpy(adap->log_addrs.osd_name, osd_str,
+ sizeof(adap->log_addrs.osd_name));
+ }
+ err = pulse8_send_and_wait(pulse8, cmd, 1 + osd_len,
+ MSGCODE_COMMAND_ACCEPTED, 0);
+ if (err)
+ goto unlock;
+ }
+
+unlock:
+ if (pulse8->restoring_config)
+ pulse8->restoring_config = false;
+ else
+ pulse8->config_pending = true;
+ mutex_unlock(&pulse8->lock);
+ return log_addr == CEC_LOG_ADDR_INVALID ? 0 : err;
+}
+
+static int pulse8_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
+ u32 signal_free_time, struct cec_msg *msg)
+{
+ struct pulse8 *pulse8 = cec_get_drvdata(adap);
+
+ pulse8->tx_msg = *msg;
+ if (debug)
+ dev_info(pulse8->dev, "adap transmit %*ph\n",
+ msg->len, msg->msg);
+ pulse8->tx_signal_free_time = signal_free_time;
+ schedule_work(&pulse8->tx_work);
+ return 0;
+}
+
+static void pulse8_cec_adap_free(struct cec_adapter *adap)
+{
+ struct pulse8 *pulse8 = cec_get_drvdata(adap);
+
+ cancel_delayed_work_sync(&pulse8->ping_eeprom_work);
+ cancel_work_sync(&pulse8->irq_work);
+ cancel_work_sync(&pulse8->tx_work);
+ kfree(pulse8);
+}
+
+static const struct cec_adap_ops pulse8_cec_adap_ops = {
+ .adap_enable = pulse8_cec_adap_enable,
+ .adap_log_addr = pulse8_cec_adap_log_addr,
+ .adap_transmit = pulse8_cec_adap_transmit,
+ .adap_free = pulse8_cec_adap_free,
+};
+
+static void pulse8_disconnect(struct serio *serio)
+{
+ struct pulse8 *pulse8 = serio_get_drvdata(serio);
+
+ cec_unregister_adapter(pulse8->adap);
+ serio_set_drvdata(serio, NULL);
+ serio_close(serio);
+}
+
+static int pulse8_setup(struct pulse8 *pulse8, struct serio *serio,
+ struct cec_log_addrs *log_addrs, u16 *pa)
+{
+ u8 *data = pulse8->data + 1;
+ u8 cmd[2];
+ int err;
+ time64_t date;
+
+ pulse8->vers = 0;
+
+ cmd[0] = MSGCODE_FIRMWARE_VERSION;
+ err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 2);
+ if (err)
+ return err;
+ pulse8->vers = (data[0] << 8) | data[1];
+ dev_info(pulse8->dev, "Firmware version %04x\n", pulse8->vers);
+ if (pulse8->vers < 2) {
+ *pa = CEC_PHYS_ADDR_INVALID;
+ return 0;
+ }
+
+ cmd[0] = MSGCODE_GET_BUILDDATE;
+ err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 4);
+ if (err)
+ return err;
+ date = (data[0] << 24) | (data[1] << 16) | (data[2] << 8) | data[3];
+ dev_info(pulse8->dev, "Firmware build date %ptT\n", &date);
+
+ dev_dbg(pulse8->dev, "Persistent config:\n");
+ cmd[0] = MSGCODE_GET_AUTO_ENABLED;
+ err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 1);
+ if (err)
+ return err;
+ pulse8->autonomous = data[0];
+ dev_dbg(pulse8->dev, "Autonomous mode: %s",
+ data[0] ? "on" : "off");
+
+ if (pulse8->vers >= 10) {
+ cmd[0] = MSGCODE_GET_AUTO_POWER_ON;
+ err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 1);
+ if (!err)
+ dev_dbg(pulse8->dev, "Auto Power On: %s",
+ data[0] ? "on" : "off");
+ }
+
+ cmd[0] = MSGCODE_GET_DEVICE_TYPE;
+ err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 1);
+ if (err)
+ return err;
+ log_addrs->primary_device_type[0] = data[0];
+ dev_dbg(pulse8->dev, "Primary device type: %d\n", data[0]);
+ switch (log_addrs->primary_device_type[0]) {
+ case CEC_OP_PRIM_DEVTYPE_TV:
+ log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_TV;
+ log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_TV;
+ break;
+ case CEC_OP_PRIM_DEVTYPE_RECORD:
+ log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_RECORD;
+ log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_RECORD;
+ break;
+ case CEC_OP_PRIM_DEVTYPE_TUNER:
+ log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_TUNER;
+ log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_TUNER;
+ break;
+ case CEC_OP_PRIM_DEVTYPE_PLAYBACK:
+ log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_PLAYBACK;
+ log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_PLAYBACK;
+ break;
+ case CEC_OP_PRIM_DEVTYPE_AUDIOSYSTEM:
+ log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_PLAYBACK;
+ log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_AUDIOSYSTEM;
+ break;
+ case CEC_OP_PRIM_DEVTYPE_SWITCH:
+ log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_UNREGISTERED;
+ log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_SWITCH;
+ break;
+ case CEC_OP_PRIM_DEVTYPE_PROCESSOR:
+ log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_SPECIFIC;
+ log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_SWITCH;
+ break;
+ default:
+ log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_UNREGISTERED;
+ log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_SWITCH;
+ dev_info(pulse8->dev, "Unknown Primary Device Type: %d\n",
+ log_addrs->primary_device_type[0]);
+ break;
+ }
+
+ cmd[0] = MSGCODE_GET_LOGICAL_ADDRESS_MASK;
+ err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 2);
+ if (err)
+ return err;
+ log_addrs->log_addr_mask = (data[0] << 8) | data[1];
+ dev_dbg(pulse8->dev, "Logical address ACK mask: %x\n",
+ log_addrs->log_addr_mask);
+ if (log_addrs->log_addr_mask)
+ log_addrs->num_log_addrs = 1;
+
+ cmd[0] = MSGCODE_GET_PHYSICAL_ADDRESS;
+ err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 1);
+ if (err)
+ return err;
+ *pa = (data[0] << 8) | data[1];
+ dev_dbg(pulse8->dev, "Physical address: %x.%x.%x.%x\n",
+ cec_phys_addr_exp(*pa));
+
+ log_addrs->cec_version = CEC_OP_CEC_VERSION_1_4;
+ if (pulse8->vers < 10) {
+ cmd[0] = MSGCODE_GET_HDMI_VERSION;
+ err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 1);
+ if (err)
+ return err;
+ log_addrs->cec_version = data[0];
+ dev_dbg(pulse8->dev, "CEC version: %d\n", log_addrs->cec_version);
+ }
+
+ cmd[0] = MSGCODE_GET_OSD_NAME;
+ err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 0);
+ if (err)
+ return err;
+ strscpy(log_addrs->osd_name, data, sizeof(log_addrs->osd_name));
+ dev_dbg(pulse8->dev, "OSD name: %s\n", log_addrs->osd_name);
+
+ return 0;
+}
+
+static int pulse8_apply_persistent_config(struct pulse8 *pulse8,
+ struct cec_log_addrs *log_addrs,
+ u16 pa)
+{
+ int err;
+
+ err = cec_s_log_addrs(pulse8->adap, log_addrs, false);
+ if (err)
+ return err;
+
+ cec_s_phys_addr(pulse8->adap, pa, false);
+
+ return 0;
+}
+
+static void pulse8_ping_eeprom_work_handler(struct work_struct *work)
+{
+ struct pulse8 *pulse8 =
+ container_of(work, struct pulse8, ping_eeprom_work.work);
+ u8 cmd;
+
+ mutex_lock(&pulse8->lock);
+ cmd = MSGCODE_PING;
+ if (pulse8_send_and_wait(pulse8, &cmd, 1,
+ MSGCODE_COMMAND_ACCEPTED, 0)) {
+ dev_warn(pulse8->dev, "failed to ping EEPROM\n");
+ goto unlock;
+ }
+
+ if (pulse8->vers < 2)
+ goto unlock;
+
+ if (pulse8->config_pending && persistent_config) {
+ dev_dbg(pulse8->dev, "writing pending config to EEPROM\n");
+ cmd = MSGCODE_WRITE_EEPROM;
+ if (pulse8_send_and_wait(pulse8, &cmd, 1,
+ MSGCODE_COMMAND_ACCEPTED, 0))
+ dev_info(pulse8->dev, "failed to write pending config to EEPROM\n");
+ else
+ pulse8->config_pending = false;
+ }
+unlock:
+ schedule_delayed_work(&pulse8->ping_eeprom_work, PING_PERIOD);
+ mutex_unlock(&pulse8->lock);
+}
+
+static int pulse8_connect(struct serio *serio, struct serio_driver *drv)
+{
+ u32 caps = CEC_CAP_DEFAULTS | CEC_CAP_PHYS_ADDR | CEC_CAP_MONITOR_ALL;
+ struct pulse8 *pulse8;
+ int err = -ENOMEM;
+ struct cec_log_addrs log_addrs = {};
+ u16 pa = CEC_PHYS_ADDR_INVALID;
+
+ pulse8 = kzalloc(sizeof(*pulse8), GFP_KERNEL);
+
+ if (!pulse8)
+ return -ENOMEM;
+
+ pulse8->serio = serio;
+ pulse8->adap = cec_allocate_adapter(&pulse8_cec_adap_ops, pulse8,
+ dev_name(&serio->dev), caps, 1);
+ err = PTR_ERR_OR_ZERO(pulse8->adap);
+ if (err < 0) {
+ kfree(pulse8);
+ return err;
+ }
+
+ pulse8->dev = &serio->dev;
+ serio_set_drvdata(serio, pulse8);
+ INIT_WORK(&pulse8->irq_work, pulse8_irq_work_handler);
+ INIT_WORK(&pulse8->tx_work, pulse8_tx_work_handler);
+ INIT_DELAYED_WORK(&pulse8->ping_eeprom_work,
+ pulse8_ping_eeprom_work_handler);
+ mutex_init(&pulse8->lock);
+ spin_lock_init(&pulse8->msg_lock);
+ pulse8->config_pending = false;
+
+ err = serio_open(serio, drv);
+ if (err)
+ goto delete_adap;
+
+ err = pulse8_setup(pulse8, serio, &log_addrs, &pa);
+ if (err)
+ goto close_serio;
+
+ err = cec_register_adapter(pulse8->adap, &serio->dev);
+ if (err < 0)
+ goto close_serio;
+
+ pulse8->dev = &pulse8->adap->devnode.dev;
+
+ if (persistent_config && pulse8->autonomous) {
+ err = pulse8_apply_persistent_config(pulse8, &log_addrs, pa);
+ if (err)
+ goto close_serio;
+ pulse8->restoring_config = true;
+ }
+
+ schedule_delayed_work(&pulse8->ping_eeprom_work, PING_PERIOD);
+
+ return 0;
+
+close_serio:
+ pulse8->serio = NULL;
+ serio_set_drvdata(serio, NULL);
+ serio_close(serio);
+delete_adap:
+ cec_delete_adapter(pulse8->adap);
+ return err;
+}
+
+static const struct serio_device_id pulse8_serio_ids[] = {
+ {
+ .type = SERIO_RS232,
+ .proto = SERIO_PULSE8_CEC,
+ .id = SERIO_ANY,
+ .extra = SERIO_ANY,
+ },
+ { 0 }
+};
+
+MODULE_DEVICE_TABLE(serio, pulse8_serio_ids);
+
+static struct serio_driver pulse8_drv = {
+ .driver = {
+ .name = "pulse8-cec",
+ },
+ .description = "Pulse Eight HDMI CEC driver",
+ .id_table = pulse8_serio_ids,
+ .interrupt = pulse8_interrupt,
+ .connect = pulse8_connect,
+ .disconnect = pulse8_disconnect,
+};
+
+module_serio_driver(pulse8_drv);
diff --git a/drivers/media/cec/usb/rainshadow/Kconfig b/drivers/media/cec/usb/rainshadow/Kconfig
new file mode 100644
index 0000000000..c9ef2c192b
--- /dev/null
+++ b/drivers/media/cec/usb/rainshadow/Kconfig
@@ -0,0 +1,13 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config USB_RAINSHADOW_CEC
+ tristate "RainShadow Tech HDMI CEC"
+ select CEC_CORE
+ select USB
+ select USB_ACM
+ select SERIO
+ select SERIO_SERPORT
+ help
+ This is a cec driver for the RainShadow Tech HDMI CEC device.
+
+ To compile this driver as a module, choose M here: the
+ module will be called rainshadow-cec.
diff --git a/drivers/media/cec/usb/rainshadow/Makefile b/drivers/media/cec/usb/rainshadow/Makefile
new file mode 100644
index 0000000000..47b33c574c
--- /dev/null
+++ b/drivers/media/cec/usb/rainshadow/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+obj-$(CONFIG_USB_RAINSHADOW_CEC) += rainshadow-cec.o
diff --git a/drivers/media/cec/usb/rainshadow/rainshadow-cec.c b/drivers/media/cec/usb/rainshadow/rainshadow-cec.c
new file mode 100644
index 0000000000..ee870ea1a8
--- /dev/null
+++ b/drivers/media/cec/usb/rainshadow/rainshadow-cec.c
@@ -0,0 +1,380 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * RainShadow Tech HDMI CEC driver
+ *
+ * Copyright 2016 Hans Verkuil <hverkuil@xs4all.nl
+ */
+
+/*
+ * Notes:
+ *
+ * The higher level protocols are currently disabled. This can be added
+ * later, similar to how this is done for the Pulse Eight CEC driver.
+ *
+ * Documentation of the protocol is available here:
+ *
+ * http://rainshadowtech.com/doc/HDMICECtoUSBandRS232v2.0.pdf
+ */
+
+#include <linux/completion.h>
+#include <linux/ctype.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/serio.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/time.h>
+#include <linux/workqueue.h>
+
+#include <media/cec.h>
+
+MODULE_AUTHOR("Hans Verkuil <hverkuil@xs4all.nl>");
+MODULE_DESCRIPTION("RainShadow Tech HDMI CEC driver");
+MODULE_LICENSE("GPL");
+
+#define DATA_SIZE 256
+
+struct rain {
+ struct device *dev;
+ struct serio *serio;
+ struct cec_adapter *adap;
+ struct completion cmd_done;
+ struct work_struct work;
+
+ /* Low-level ringbuffer, collecting incoming characters */
+ char buf[DATA_SIZE];
+ unsigned int buf_rd_idx;
+ unsigned int buf_wr_idx;
+ unsigned int buf_len;
+ spinlock_t buf_lock;
+
+ /* command buffer */
+ char cmd[DATA_SIZE];
+ unsigned int cmd_idx;
+ bool cmd_started;
+
+ /* reply to a command, only used to store the firmware version */
+ char cmd_reply[DATA_SIZE];
+
+ struct mutex write_lock;
+};
+
+static void rain_process_msg(struct rain *rain)
+{
+ struct cec_msg msg = {};
+ const char *cmd = rain->cmd + 3;
+ int stat = -1;
+
+ for (; *cmd; cmd++) {
+ if (!isxdigit(*cmd))
+ continue;
+ if (isxdigit(cmd[0]) && isxdigit(cmd[1])) {
+ if (msg.len == CEC_MAX_MSG_SIZE)
+ break;
+ if (hex2bin(msg.msg + msg.len, cmd, 1))
+ continue;
+ msg.len++;
+ cmd++;
+ continue;
+ }
+ if (!cmd[1])
+ stat = hex_to_bin(cmd[0]);
+ break;
+ }
+
+ if (rain->cmd[0] == 'R') {
+ if (stat == 1 || stat == 2)
+ cec_received_msg(rain->adap, &msg);
+ return;
+ }
+
+ switch (stat) {
+ case 1:
+ cec_transmit_attempt_done(rain->adap, CEC_TX_STATUS_OK);
+ break;
+ case 2:
+ cec_transmit_attempt_done(rain->adap, CEC_TX_STATUS_NACK);
+ break;
+ default:
+ cec_transmit_attempt_done(rain->adap, CEC_TX_STATUS_LOW_DRIVE);
+ break;
+ }
+}
+
+static void rain_irq_work_handler(struct work_struct *work)
+{
+ struct rain *rain =
+ container_of(work, struct rain, work);
+
+ while (true) {
+ unsigned long flags;
+ char data;
+
+ spin_lock_irqsave(&rain->buf_lock, flags);
+ if (!rain->buf_len) {
+ spin_unlock_irqrestore(&rain->buf_lock, flags);
+ break;
+ }
+
+ data = rain->buf[rain->buf_rd_idx];
+ rain->buf_len--;
+ rain->buf_rd_idx = (rain->buf_rd_idx + 1) & 0xff;
+
+ spin_unlock_irqrestore(&rain->buf_lock, flags);
+
+ if (!rain->cmd_started && data != '?')
+ continue;
+
+ switch (data) {
+ case '\r':
+ rain->cmd[rain->cmd_idx] = '\0';
+ dev_dbg(rain->dev, "received: %s\n", rain->cmd);
+ if (!memcmp(rain->cmd, "REC", 3) ||
+ !memcmp(rain->cmd, "STA", 3)) {
+ rain_process_msg(rain);
+ } else {
+ strscpy(rain->cmd_reply, rain->cmd,
+ sizeof(rain->cmd_reply));
+ complete(&rain->cmd_done);
+ }
+ rain->cmd_idx = 0;
+ rain->cmd_started = false;
+ break;
+
+ case '\n':
+ rain->cmd_idx = 0;
+ rain->cmd_started = false;
+ break;
+
+ case '?':
+ rain->cmd_idx = 0;
+ rain->cmd_started = true;
+ break;
+
+ default:
+ if (rain->cmd_idx >= DATA_SIZE - 1) {
+ dev_dbg(rain->dev,
+ "throwing away %d bytes of garbage\n", rain->cmd_idx);
+ rain->cmd_idx = 0;
+ }
+ rain->cmd[rain->cmd_idx++] = data;
+ break;
+ }
+ }
+}
+
+static irqreturn_t rain_interrupt(struct serio *serio, unsigned char data,
+ unsigned int flags)
+{
+ struct rain *rain = serio_get_drvdata(serio);
+
+ if (rain->buf_len == DATA_SIZE) {
+ dev_warn_once(rain->dev, "buffer overflow\n");
+ return IRQ_HANDLED;
+ }
+ spin_lock(&rain->buf_lock);
+ rain->buf_len++;
+ rain->buf[rain->buf_wr_idx] = data;
+ rain->buf_wr_idx = (rain->buf_wr_idx + 1) & 0xff;
+ spin_unlock(&rain->buf_lock);
+ schedule_work(&rain->work);
+ return IRQ_HANDLED;
+}
+
+static void rain_disconnect(struct serio *serio)
+{
+ struct rain *rain = serio_get_drvdata(serio);
+
+ cancel_work_sync(&rain->work);
+ cec_unregister_adapter(rain->adap);
+ dev_info(&serio->dev, "disconnected\n");
+ serio_close(serio);
+ serio_set_drvdata(serio, NULL);
+ kfree(rain);
+}
+
+static int rain_send(struct rain *rain, const char *command)
+{
+ int err = serio_write(rain->serio, '!');
+
+ dev_dbg(rain->dev, "send: %s\n", command);
+ while (!err && *command)
+ err = serio_write(rain->serio, *command++);
+ if (!err)
+ err = serio_write(rain->serio, '~');
+
+ return err;
+}
+
+static int rain_send_and_wait(struct rain *rain,
+ const char *cmd, const char *reply)
+{
+ int err;
+
+ init_completion(&rain->cmd_done);
+
+ mutex_lock(&rain->write_lock);
+ err = rain_send(rain, cmd);
+ if (err)
+ goto err;
+
+ if (!wait_for_completion_timeout(&rain->cmd_done, HZ)) {
+ err = -ETIMEDOUT;
+ goto err;
+ }
+ if (reply && strncmp(rain->cmd_reply, reply, strlen(reply))) {
+ dev_dbg(rain->dev,
+ "transmit of '%s': received '%s' instead of '%s'\n",
+ cmd, rain->cmd_reply, reply);
+ err = -EIO;
+ }
+err:
+ mutex_unlock(&rain->write_lock);
+ return err;
+}
+
+static int rain_setup(struct rain *rain, struct serio *serio,
+ struct cec_log_addrs *log_addrs, u16 *pa)
+{
+ int err;
+
+ err = rain_send_and_wait(rain, "R", "REV");
+ if (err)
+ return err;
+ dev_info(rain->dev, "Firmware version %s\n", rain->cmd_reply + 4);
+
+ err = rain_send_and_wait(rain, "Q 1", "QTY");
+ if (err)
+ return err;
+ err = rain_send_and_wait(rain, "c0000", "CFG");
+ if (err)
+ return err;
+ return rain_send_and_wait(rain, "A F 0000", "ADR");
+}
+
+static int rain_cec_adap_enable(struct cec_adapter *adap, bool enable)
+{
+ return 0;
+}
+
+static int rain_cec_adap_log_addr(struct cec_adapter *adap, u8 log_addr)
+{
+ struct rain *rain = cec_get_drvdata(adap);
+ u8 cmd[16];
+
+ if (log_addr == CEC_LOG_ADDR_INVALID)
+ log_addr = CEC_LOG_ADDR_UNREGISTERED;
+ snprintf(cmd, sizeof(cmd), "A %x", log_addr);
+ return rain_send_and_wait(rain, cmd, "ADR");
+}
+
+static int rain_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
+ u32 signal_free_time, struct cec_msg *msg)
+{
+ struct rain *rain = cec_get_drvdata(adap);
+ char cmd[2 * CEC_MAX_MSG_SIZE + 16];
+ unsigned int i;
+ int err;
+
+ if (msg->len == 1) {
+ snprintf(cmd, sizeof(cmd), "x%x", cec_msg_destination(msg));
+ } else {
+ char hex[3];
+
+ snprintf(cmd, sizeof(cmd), "x%x %02x ",
+ cec_msg_destination(msg), msg->msg[1]);
+ for (i = 2; i < msg->len; i++) {
+ snprintf(hex, sizeof(hex), "%02x", msg->msg[i]);
+ strlcat(cmd, hex, sizeof(cmd));
+ }
+ }
+ mutex_lock(&rain->write_lock);
+ err = rain_send(rain, cmd);
+ mutex_unlock(&rain->write_lock);
+ return err;
+}
+
+static const struct cec_adap_ops rain_cec_adap_ops = {
+ .adap_enable = rain_cec_adap_enable,
+ .adap_log_addr = rain_cec_adap_log_addr,
+ .adap_transmit = rain_cec_adap_transmit,
+};
+
+static int rain_connect(struct serio *serio, struct serio_driver *drv)
+{
+ u32 caps = CEC_CAP_DEFAULTS | CEC_CAP_PHYS_ADDR | CEC_CAP_MONITOR_ALL;
+ struct rain *rain;
+ int err = -ENOMEM;
+ struct cec_log_addrs log_addrs = {};
+ u16 pa = CEC_PHYS_ADDR_INVALID;
+
+ rain = kzalloc(sizeof(*rain), GFP_KERNEL);
+
+ if (!rain)
+ return -ENOMEM;
+
+ rain->serio = serio;
+ rain->adap = cec_allocate_adapter(&rain_cec_adap_ops, rain,
+ dev_name(&serio->dev), caps, 1);
+ err = PTR_ERR_OR_ZERO(rain->adap);
+ if (err < 0)
+ goto free_device;
+
+ rain->dev = &serio->dev;
+ serio_set_drvdata(serio, rain);
+ INIT_WORK(&rain->work, rain_irq_work_handler);
+ mutex_init(&rain->write_lock);
+ spin_lock_init(&rain->buf_lock);
+
+ err = serio_open(serio, drv);
+ if (err)
+ goto delete_adap;
+
+ err = rain_setup(rain, serio, &log_addrs, &pa);
+ if (err)
+ goto close_serio;
+
+ err = cec_register_adapter(rain->adap, &serio->dev);
+ if (err < 0)
+ goto close_serio;
+
+ rain->dev = &rain->adap->devnode.dev;
+ return 0;
+
+close_serio:
+ serio_close(serio);
+delete_adap:
+ cec_delete_adapter(rain->adap);
+ serio_set_drvdata(serio, NULL);
+free_device:
+ kfree(rain);
+ return err;
+}
+
+static const struct serio_device_id rain_serio_ids[] = {
+ {
+ .type = SERIO_RS232,
+ .proto = SERIO_RAINSHADOW_CEC,
+ .id = SERIO_ANY,
+ .extra = SERIO_ANY,
+ },
+ { 0 }
+};
+
+MODULE_DEVICE_TABLE(serio, rain_serio_ids);
+
+static struct serio_driver rain_drv = {
+ .driver = {
+ .name = "rainshadow-cec",
+ },
+ .description = "RainShadow Tech HDMI CEC driver",
+ .id_table = rain_serio_ids,
+ .interrupt = rain_interrupt,
+ .connect = rain_connect,
+ .disconnect = rain_disconnect,
+};
+
+module_serio_driver(rain_drv);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-30 04:54:02 +0000