| /* |
| * Pulse Eight HDMI CEC driver |
| * |
| * Copyright 2016 Hans Verkuil <hverkuil@xs4all.nl |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the |
| * Free Software Foundation; either version of 2 of the License, or (at your |
| * option) any later version. See the file COPYING in the main directory of |
| * this archive for more details. |
| */ |
| |
| /* |
| * 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 (0-1)"); |
| 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, |
| 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_FRAME_EOM = 0x80, |
| MSGCODE_FRAME_ACK = 0x40, |
| }; |
| |
| #define MSGSTART 0xff |
| #define MSGEND 0xfe |
| #define MSGESC 0xfd |
| #define MSGOFFSET 3 |
| |
| #define DATA_SIZE 256 |
| |
| #define PING_PERIOD (15 * HZ) |
| |
| struct pulse8 { |
| struct device *dev; |
| struct serio *serio; |
| struct cec_adapter *adap; |
| unsigned int vers; |
| struct completion cmd_done; |
| struct work_struct work; |
| struct delayed_work ping_eeprom_work; |
| struct cec_msg rx_msg; |
| u8 data[DATA_SIZE]; |
| unsigned int len; |
| u8 buf[DATA_SIZE]; |
| unsigned int idx; |
| bool escape; |
| bool started; |
| struct mutex config_lock; |
| struct mutex write_lock; |
| bool config_pending; |
| bool restoring_config; |
| bool autonomous; |
| }; |
| |
| static void pulse8_ping_eeprom_work_handler(struct work_struct *work); |
| |
| static void pulse8_irq_work_handler(struct work_struct *work) |
| { |
| struct pulse8 *pulse8 = |
| container_of(work, struct pulse8, work); |
| |
| switch (pulse8->data[0] & 0x3f) { |
| case MSGCODE_FRAME_DATA: |
| cec_received_msg(pulse8->adap, &pulse8->rx_msg); |
| break; |
| case MSGCODE_TRANSMIT_SUCCEEDED: |
| cec_transmit_attempt_done(pulse8->adap, CEC_TX_STATUS_OK); |
| break; |
| case MSGCODE_TRANSMIT_FAILED_ACK: |
| cec_transmit_attempt_done(pulse8->adap, CEC_TX_STATUS_NACK); |
| break; |
| case MSGCODE_TRANSMIT_FAILED_LINE: |
| case MSGCODE_TRANSMIT_FAILED_TIMEOUT_DATA: |
| case MSGCODE_TRANSMIT_FAILED_TIMEOUT_LINE: |
| cec_transmit_attempt_done(pulse8->adap, CEC_TX_STATUS_ERROR); |
| break; |
| } |
| } |
| |
| static irqreturn_t pulse8_interrupt(struct serio *serio, unsigned char data, |
| unsigned int flags) |
| { |
| struct pulse8 *pulse8 = serio_get_drvdata(serio); |
| |
| 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) { |
| struct cec_msg *msg = &pulse8->rx_msg; |
| |
| if (debug) |
| dev_info(pulse8->dev, "received: %*ph\n", |
| pulse8->idx, pulse8->buf); |
| pulse8->data[0] = pulse8->buf[0]; |
| switch (pulse8->buf[0] & 0x3f) { |
| case MSGCODE_FRAME_START: |
| msg->len = 1; |
| msg->msg[0] = pulse8->buf[1]; |
| break; |
| case MSGCODE_FRAME_DATA: |
| if (msg->len == CEC_MAX_MSG_SIZE) |
| break; |
| msg->msg[msg->len++] = pulse8->buf[1]; |
| if (pulse8->buf[0] & MSGCODE_FRAME_EOM) |
| schedule_work(&pulse8->work); |
| break; |
| case MSGCODE_TRANSMIT_SUCCEEDED: |
| case MSGCODE_TRANSMIT_FAILED_LINE: |
| case MSGCODE_TRANSMIT_FAILED_ACK: |
| case MSGCODE_TRANSMIT_FAILED_TIMEOUT_DATA: |
| case MSGCODE_TRANSMIT_FAILED_TIMEOUT_LINE: |
| schedule_work(&pulse8->work); |
| break; |
| case MSGCODE_HIGH_ERROR: |
| case MSGCODE_LOW_ERROR: |
| case MSGCODE_RECEIVE_FAILED: |
| case MSGCODE_TIMEOUT_ERROR: |
| 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 void pulse8_disconnect(struct serio *serio) |
| { |
| struct pulse8 *pulse8 = serio_get_drvdata(serio); |
| |
| cec_unregister_adapter(pulse8->adap); |
| cancel_delayed_work_sync(&pulse8->ping_eeprom_work); |
| dev_info(&serio->dev, "disconnected\n"); |
| serio_close(serio); |
| serio_set_drvdata(serio, NULL); |
| kfree(pulse8); |
| } |
| |
| 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; |
| |
| /*dev_info(pulse8->dev, "transmit: %*ph\n", 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: failed %02x\n", |
| pulse8->data[0] & 0x3f); |
| 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; |
| |
| mutex_lock(&pulse8->write_lock); |
| err = pulse8_send_and_wait_once(pulse8, cmd, cmd_len, response, size); |
| |
| if (err == -ENOTTY) { |
| 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) |
| goto unlock; |
| err = pulse8_send_and_wait_once(pulse8, cmd, cmd_len, |
| response, size); |
| } |
| |
| unlock: |
| mutex_unlock(&pulse8->write_lock); |
| return err == -ENOTTY ? -EIO : err; |
| } |
| |
| 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; |
| struct tm tm; |
| time_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]; |
| time_to_tm(date, 0, &tm); |
| dev_info(pulse8->dev, "Firmware build date %04ld.%02d.%02d %02d:%02d:%02d\n", |
| tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, |
| tm.tm_hour, tm.tm_min, tm.tm_sec); |
| |
| 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"); |
| |
| 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)); |
| |
| 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; |
| strncpy(log_addrs->osd_name, data, 13); |
| 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 int pulse8_cec_adap_enable(struct cec_adapter *adap, bool enable) |
| { |
| struct pulse8 *pulse8 = cec_get_drvdata(adap); |
| u8 cmd[16]; |
| int err; |
| |
| cmd[0] = MSGCODE_SET_CONTROLLED; |
| cmd[1] = enable; |
| err = pulse8_send_and_wait(pulse8, cmd, 2, |
| MSGCODE_COMMAND_ACCEPTED, 1); |
| 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->config_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; |
| |
| 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; |
| strncpy(cmd + 1, adap->log_addrs.osd_name, 13); |
| if (osd_len < 4) { |
| memset(osd_str + osd_len, ' ', 4 - osd_len); |
| osd_len = 4; |
| osd_str[osd_len] = '\0'; |
| strcpy(adap->log_addrs.osd_name, osd_str); |
| } |
| 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->config_lock); |
| return 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); |
| u8 cmd[2]; |
| unsigned int i; |
| int err; |
| |
| cmd[0] = MSGCODE_TRANSMIT_IDLETIME; |
| cmd[1] = 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); |
| 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) { |
| cmd[0] = msg->len == 2 ? MSGCODE_TRANSMIT_EOM : |
| MSGCODE_TRANSMIT; |
| cmd[1] = msg->msg[1]; |
| err = pulse8_send_and_wait(pulse8, cmd, 2, |
| MSGCODE_COMMAND_ACCEPTED, 1); |
| for (i = 0; !err && i + 2 < msg->len; i++) { |
| cmd[0] = (i + 2 == msg->len - 1) ? |
| MSGCODE_TRANSMIT_EOM : MSGCODE_TRANSMIT; |
| cmd[1] = msg->msg[i + 2]; |
| err = pulse8_send_and_wait(pulse8, cmd, 2, |
| MSGCODE_COMMAND_ACCEPTED, 1); |
| } |
| } |
| |
| return err; |
| } |
| |
| static int pulse8_received(struct cec_adapter *adap, struct cec_msg *msg) |
| { |
| return -ENOMSG; |
| } |
| |
| 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, |
| .received = pulse8_received, |
| }; |
| |
| 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) |
| goto free_device; |
| |
| pulse8->dev = &serio->dev; |
| serio_set_drvdata(serio, pulse8); |
| INIT_WORK(&pulse8->work, pulse8_irq_work_handler); |
| mutex_init(&pulse8->write_lock); |
| mutex_init(&pulse8->config_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; |
| } |
| |
| INIT_DELAYED_WORK(&pulse8->ping_eeprom_work, |
| pulse8_ping_eeprom_work_handler); |
| schedule_delayed_work(&pulse8->ping_eeprom_work, PING_PERIOD); |
| |
| return 0; |
| |
| close_serio: |
| serio_close(serio); |
| delete_adap: |
| cec_delete_adapter(pulse8->adap); |
| serio_set_drvdata(serio, NULL); |
| free_device: |
| kfree(pulse8); |
| return err; |
| } |
| |
| 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; |
| |
| schedule_delayed_work(&pulse8->ping_eeprom_work, PING_PERIOD); |
| cmd = MSGCODE_PING; |
| pulse8_send_and_wait(pulse8, &cmd, 1, |
| MSGCODE_COMMAND_ACCEPTED, 0); |
| |
| if (pulse8->vers < 2) |
| return; |
| |
| mutex_lock(&pulse8->config_lock); |
| 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; |
| } |
| mutex_unlock(&pulse8->config_lock); |
| } |
| |
| static 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); |