diff options
Diffstat (limited to 'drivers/media/cec/usb')
| -rw-r--r-- | drivers/media/cec/usb/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/media/cec/usb/Makefile | 6 | ||||
| -rw-r--r-- | drivers/media/cec/usb/pulse8/Kconfig | 13 | ||||
| -rw-r--r-- | drivers/media/cec/usb/pulse8/Makefile | 2 | ||||
| -rw-r--r-- | drivers/media/cec/usb/pulse8/pulse8-cec.c | 924 | ||||
| -rw-r--r-- | drivers/media/cec/usb/rainshadow/Kconfig | 13 | ||||
| -rw-r--r-- | drivers/media/cec/usb/rainshadow/Makefile | 2 | ||||
| -rw-r--r-- | drivers/media/cec/usb/rainshadow/rainshadow-cec.c | 380 |
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 000000000..3f3a5c752 --- /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 000000000..e4183d1bf --- /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 000000000..a0224ef80 --- /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 000000000..7816c68bf --- /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 000000000..ba67587bd --- /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 000000000..c9ef2c192 --- /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 000000000..47b33c574 --- /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 000000000..ee870ea1a --- /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); |