diff options
| -rw-r--r-- | drivers/input/mouse/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/input/mouse/cyapa_gen5.c | 391 |
2 files changed, 392 insertions, 0 deletions
diff --git a/drivers/input/mouse/Kconfig b/drivers/input/mouse/Kconfig index 2541bfa1181a..f8c29d7dc478 100644 --- a/drivers/input/mouse/Kconfig +++ b/drivers/input/mouse/Kconfig @@ -216,6 +216,7 @@ config MOUSE_BCM5974 config MOUSE_CYAPA tristate "Cypress APA I2C Trackpad support" depends on I2C + select CRC_ITU_T help This driver adds support for Cypress All Points Addressable (APA) I2C Trackpads, including the ones used in 2012 Samsung Chromebooks. diff --git a/drivers/input/mouse/cyapa_gen5.c b/drivers/input/mouse/cyapa_gen5.c index a049ae383027..442b29d87ed2 100644 --- a/drivers/input/mouse/cyapa_gen5.c +++ b/drivers/input/mouse/cyapa_gen5.c @@ -18,6 +18,7 @@ #include <linux/completion.h> #include <linux/slab.h> #include <linux/unaligned/access_ok.h> +#include <linux/crc-itu-t.h> #include "cyapa.h" @@ -264,6 +265,79 @@ struct cyapa_gen5_report_data { struct cyapa_gen5_touch_record touch_records[10]; } __packed; +struct cyapa_tsg_bin_image_head { + u8 head_size; /* Unit: bytes, including itself. */ + u8 ttda_driver_major_version; /* Reserved as 0. */ + u8 ttda_driver_minor_version; /* Reserved as 0. */ + u8 fw_major_version; + u8 fw_minor_version; + u8 fw_revision_control_number[8]; +} __packed; + +struct cyapa_tsg_bin_image_data_record { + u8 flash_array_id; + __be16 row_number; + /* The number of bytes of flash data contained in this record. */ + __be16 record_len; + /* The flash program data. */ + u8 record_data[CYAPA_TSG_FW_ROW_SIZE]; +} __packed; + +struct cyapa_tsg_bin_image { + struct cyapa_tsg_bin_image_head image_head; + struct cyapa_tsg_bin_image_data_record records[0]; +} __packed; + +struct gen5_bl_packet_start { + u8 sop; /* Start of packet, must be 01h */ + u8 cmd_code; + __le16 data_length; /* Size of data parameter start from data[0] */ +} __packed; + +struct gen5_bl_packet_end { + __le16 crc; + u8 eop; /* End of packet, must be 17h */ +} __packed; + +struct gen5_bl_cmd_head { + __le16 addr; /* Output report register address, must be 0004h */ + /* Size of packet not including output report register address */ + __le16 length; + u8 report_id; /* Bootloader output report id, must be 40h */ + u8 rsvd; /* Reserved, must be 0 */ + struct gen5_bl_packet_start packet_start; + u8 data[0]; /* Command data variable based on commands */ +} __packed; + +/* Initiate bootload command data structure. */ +struct gen5_bl_initiate_cmd_data { + /* Key must be "A5h 01h 02h 03h FFh FEh FDh 5Ah" */ + u8 key[CYAPA_TSG_BL_KEY_SIZE]; + u8 metadata_raw_parameter[CYAPA_TSG_FLASH_MAP_METADATA_SIZE]; + __le16 metadata_crc; +} __packed; + +struct gen5_bl_metadata_row_params { + __le16 size; + __le16 maximun_size; + __le32 app_start; + __le16 app_len; + __le16 app_crc; + __le32 app_entry; + __le32 upgrade_start; + __le16 upgrade_len; + __le16 entry_row_crc; + u8 padding[36]; /* Padding data must be 0 */ + __le16 metadata_crc; /* CRC starts at offset of 60 */ +} __packed; + +/* Bootload program and verify row command data structure */ +struct gen5_bl_flash_row_head { + u8 flash_array_id; + __le16 flash_row_id; + u8 flash_data[0]; +} __packed; + struct gen5_app_cmd_head { __le16 addr; /* Output report register address, must be 0004h */ /* Size of packet not including output report register address */ @@ -297,6 +371,10 @@ struct gen5_app_get_parameter_data { #define GEN5_DEV_UNINIT_SLEEP_TIME(cyapa) \ (((cyapa)->dev_sleep_time) == UNINIT_SLEEP_TIME) + +static u8 cyapa_gen5_bl_cmd_key[] = { 0xa5, 0x01, 0x02, 0x03, + 0xff, 0xfe, 0xfd, 0x5a }; + static int cyapa_gen5_initialize(struct cyapa *cyapa) { struct cyapa_gen5_cmd_states *gen5_pip = &cyapa->cmd_states.gen5; @@ -618,6 +696,22 @@ static bool cyapa_gen5_sort_tsg_pip_app_resp_data(struct cyapa *cyapa, return false; } +static bool cyapa_gen5_sort_application_launch_data(struct cyapa *cyapa, + u8 *buf, int len) +{ + if (buf == NULL || len < GEN5_RESP_LENGTH_SIZE) + return false; + + /* + * After reset or power on, trackpad device always sets to 0x00 0x00 + * to indicate a reset or power on event. + */ + if (buf[0] == 0 && buf[1] == 0) + return true; + + return false; +} + static bool cyapa_gen5_sort_hid_descriptor_data(struct cyapa *cyapa, u8 *buf, int len) { @@ -923,6 +1017,80 @@ static int cyapa_gen5_state_parse(struct cyapa *cyapa, u8 *reg_data, int len) return -EAGAIN; } +static int cyapa_gen5_bl_initiate(struct cyapa *cyapa, + const struct firmware *fw) +{ + struct cyapa_tsg_bin_image *image; + struct gen5_bl_cmd_head *bl_cmd_head; + struct gen5_bl_packet_start *bl_packet_start; + struct gen5_bl_initiate_cmd_data *cmd_data; + struct gen5_bl_packet_end *bl_packet_end; + u8 cmd[CYAPA_TSG_MAX_CMD_SIZE]; + int cmd_len; + u16 cmd_data_len; + u16 cmd_crc = 0; + u16 meta_data_crc = 0; + u8 resp_data[11]; + int resp_len; + int records_num; + u8 *data; + int error; + + /* Try to dump all buffered report data before any send command. */ + cyapa_empty_pip_output_data(cyapa, NULL, NULL, NULL); + + memset(cmd, 0, CYAPA_TSG_MAX_CMD_SIZE); + bl_cmd_head = (struct gen5_bl_cmd_head *)cmd; + cmd_data_len = CYAPA_TSG_BL_KEY_SIZE + CYAPA_TSG_FLASH_MAP_BLOCK_SIZE; + cmd_len = sizeof(struct gen5_bl_cmd_head) + cmd_data_len + + sizeof(struct gen5_bl_packet_end); + + put_unaligned_le16(GEN5_OUTPUT_REPORT_ADDR, &bl_cmd_head->addr); + put_unaligned_le16(cmd_len - 2, &bl_cmd_head->length); + bl_cmd_head->report_id = GEN5_BL_CMD_REPORT_ID; + + bl_packet_start = &bl_cmd_head->packet_start; + bl_packet_start->sop = GEN5_SOP_KEY; + bl_packet_start->cmd_code = GEN5_BL_CMD_INITIATE_BL; + /* 8 key bytes and 128 bytes block size */ + put_unaligned_le16(cmd_data_len, &bl_packet_start->data_length); + + cmd_data = (struct gen5_bl_initiate_cmd_data *)bl_cmd_head->data; + memcpy(cmd_data->key, cyapa_gen5_bl_cmd_key, CYAPA_TSG_BL_KEY_SIZE); + + /* Copy 60 bytes Meta Data Row Parameters */ + image = (struct cyapa_tsg_bin_image *)fw->data; + records_num = (fw->size - sizeof(struct cyapa_tsg_bin_image_head)) / + sizeof(struct cyapa_tsg_bin_image_data_record); + /* APP_INTEGRITY row is always the last row block */ + data = image->records[records_num - 1].record_data; + memcpy(cmd_data->metadata_raw_parameter, data, + CYAPA_TSG_FLASH_MAP_METADATA_SIZE); + + meta_data_crc = crc_itu_t(0xffff, cmd_data->metadata_raw_parameter, + CYAPA_TSG_FLASH_MAP_METADATA_SIZE); + put_unaligned_le16(meta_data_crc, &cmd_data->metadata_crc); + + bl_packet_end = (struct gen5_bl_packet_end *)(bl_cmd_head->data + + cmd_data_len); + cmd_crc = crc_itu_t(0xffff, (u8 *)bl_packet_start, + sizeof(struct gen5_bl_packet_start) + cmd_data_len); + put_unaligned_le16(cmd_crc, &bl_packet_end->crc); + bl_packet_end->eop = GEN5_EOP_KEY; + + resp_len = sizeof(resp_data); + error = cyapa_i2c_pip_cmd_irq_sync(cyapa, + cmd, cmd_len, + resp_data, &resp_len, 12000, + cyapa_gen5_sort_tsg_pip_bl_resp_data, true); + if (error || resp_len != GEN5_BL_INITIATE_RESP_LEN || + resp_data[2] != GEN5_BL_RESP_REPORT_ID || + !GEN5_CMD_COMPLETE_SUCCESS(resp_data[5])) + return error ? error : -EAGAIN; + + return 0; +} + static bool cyapa_gen5_sort_bl_exit_data(struct cyapa *cyapa, u8 *buf, int len) { if (buf == NULL || len < GEN5_RESP_LENGTH_SIZE) @@ -973,6 +1141,219 @@ static int cyapa_gen5_bl_exit(struct cyapa *cyapa) return -ENODEV; } +static int cyapa_gen5_bl_enter(struct cyapa *cyapa) +{ + u8 cmd[] = { 0x04, 0x00, 0x05, 0x00, 0x2F, 0x00, 0x01 }; + u8 resp_data[2]; + int resp_len; + int error; + + error = cyapa_poll_state(cyapa, 500); + if (error < 0) + return error; + if (cyapa->gen != CYAPA_GEN5) + return -EINVAL; + + /* Already in Gen5 BL. Skipping exit. */ + if (cyapa->state == CYAPA_STATE_GEN5_BL) + return 0; + + if (cyapa->state != CYAPA_STATE_GEN5_APP) + return -EAGAIN; + + /* Try to dump all buffered report data before any send command. */ + cyapa_empty_pip_output_data(cyapa, NULL, NULL, NULL); + + /* + * Send bootloader enter command to trackpad device, + * after enter bootloader, the response data is two bytes of 0x00 0x00. + */ + resp_len = sizeof(resp_data); + memset(resp_data, 0, resp_len); + error = cyapa_i2c_pip_cmd_irq_sync(cyapa, + cmd, sizeof(cmd), + resp_data, &resp_len, + 5000, cyapa_gen5_sort_application_launch_data, + true); + if (error || resp_data[0] != 0x00 || resp_data[1] != 0x00) + return error < 0 ? error : -EAGAIN; + + cyapa->operational = false; + cyapa->state = CYAPA_STATE_GEN5_BL; + return 0; +} + +static int cyapa_gen5_check_fw(struct cyapa *cyapa, const struct firmware *fw) +{ + struct device *dev = &cyapa->client->dev; + struct gen5_bl_metadata_row_params metadata; + struct cyapa_tsg_bin_image *image; + int flash_records_count; + u16 app_crc = 0; + u16 app_integrity_crc = 0; + u16 row_num; + u8 *data; + int record_index; + int i; + + image = (struct cyapa_tsg_bin_image *)fw->data; + flash_records_count = (fw->size - + sizeof(struct cyapa_tsg_bin_image_head)) / + sizeof(struct cyapa_tsg_bin_image_data_record); + + /* APP_INTEGRITY row is always the last row block, + * and the row id must be 0x01ff */ + row_num = get_unaligned_be16( + &image->records[flash_records_count - 1].row_number); + if (image->records[flash_records_count - 1].flash_array_id != 0x00 && + row_num != 0x01ff) { + dev_err(dev, "%s: invalid app_integrity data.\n", __func__); + return -EINVAL; + } + data = image->records[flash_records_count - 1].record_data; + + metadata.app_start = get_unaligned_le32(&data[4]); + metadata.app_len = get_unaligned_le16(&data[8]); + metadata.app_crc = get_unaligned_le16(&data[10]); + metadata.upgrade_start = get_unaligned_le32(&data[16]); + metadata.upgrade_len = get_unaligned_le16(&data[20]); + metadata.metadata_crc = get_unaligned_le16(&data[60]); + + if ((metadata.app_start + metadata.app_len + + metadata.upgrade_start + metadata.upgrade_len) % + CYAPA_TSG_FW_ROW_SIZE) { + dev_err(dev, "%s: invalid image alignment.\n", __func__); + return -EINVAL; + } + + /* Verify app_integrity crc */ + app_integrity_crc = crc_itu_t(0xffff, data, + CYAPA_TSG_APP_INTEGRITY_SIZE); + if (app_integrity_crc != metadata.metadata_crc) { + dev_err(dev, "%s: invalid app_integrity crc.\n", __func__); + return -EINVAL; + } + + /* + * Verify application image CRC + */ + record_index = metadata.app_start / CYAPA_TSG_FW_ROW_SIZE - + CYAPA_TSG_IMG_START_ROW_NUM; + data = (u8 *)&image->records[record_index].record_data; + app_crc = crc_itu_t(0xffff, data, CYAPA_TSG_FW_ROW_SIZE); + for (i = 1; i < (metadata.app_len / CYAPA_TSG_FW_ROW_SIZE); i++) { + data = (u8 *)&image->records[++record_index].record_data; + app_crc = crc_itu_t(app_crc, data, CYAPA_TSG_FW_ROW_SIZE); + } + + if (app_crc != metadata.app_crc) { + dev_err(dev, "%s: invalid firmware app crc check.\n", __func__); + return -EINVAL; + } + + return 0; +} + +static int cyapa_gen5_write_fw_block(struct cyapa *cyapa, + struct cyapa_tsg_bin_image_data_record *flash_record) +{ + struct gen5_bl_cmd_head *bl_cmd_head; + struct gen5_bl_packet_start *bl_packet_start; + struct gen5_bl_flash_row_head *flash_row_head; + struct gen5_bl_packet_end *bl_packet_end; + u8 cmd[CYAPA_TSG_MAX_CMD_SIZE]; + u16 cmd_len; + u8 flash_array_id; + u16 flash_row_id; + u16 record_len; + u8 *record_data; + u16 data_len; + u16 crc; + u8 resp_data[11]; + int resp_len; + int error; + + flash_array_id = flash_record->flash_array_id; + flash_row_id = get_unaligned_be16(&flash_record->row_number); + record_len = get_unaligned_be16(&flash_record->record_len); + record_data = flash_record->record_data; + + memset(cmd, 0, CYAPA_TSG_MAX_CMD_SIZE); + bl_cmd_head = (struct gen5_bl_cmd_head *)cmd; + bl_packet_start = &bl_cmd_head->packet_start; + cmd_len = sizeof(struct gen5_bl_cmd_head) + + sizeof(struct gen5_bl_flash_row_head) + + CYAPA_TSG_FLASH_MAP_BLOCK_SIZE + + sizeof(struct gen5_bl_packet_end); + + put_unaligned_le16(GEN5_OUTPUT_REPORT_ADDR, &bl_cmd_head->addr); + /* Don't include 2 bytes register address */ + put_unaligned_le16(cmd_len - 2, &bl_cmd_head->length); + bl_cmd_head->report_id = GEN5_BL_CMD_REPORT_ID; + bl_packet_start->sop = GEN5_SOP_KEY; + bl_packet_start->cmd_code = GEN5_BL_CMD_PROGRAM_VERIFY_ROW; + + /* 1 (Flash Array ID) + 2 (Flash Row ID) + 128 (flash data) */ + data_len = sizeof(struct gen5_bl_flash_row_head) + record_len; + put_unaligned_le16(data_len, &bl_packet_start->data_length); + + flash_row_head = (struct gen5_bl_flash_row_head *)bl_cmd_head->data; + flash_row_head->flash_array_id = flash_array_id; + put_unaligned_le16(flash_row_id, &flash_row_head->flash_row_id); + memcpy(flash_row_head->flash_data, record_data, record_len); + + bl_packet_end = (struct gen5_bl_packet_end *)(bl_cmd_head->data + + data_len); + crc = crc_itu_t(0xffff, (u8 *)bl_packet_start, + sizeof(struct gen5_bl_packet_start) + data_len); + put_unaligned_le16(crc, &bl_packet_end->crc); + bl_packet_end->eop = GEN5_EOP_KEY; + + resp_len = sizeof(resp_data); + error = cyapa_i2c_pip_cmd_irq_sync(cyapa, cmd, cmd_len, + resp_data, &resp_len, + 500, cyapa_gen5_sort_tsg_pip_bl_resp_data, true); + if (error || resp_len != GEN5_BL_BLOCK_WRITE_RESP_LEN || + resp_data[2] != GEN5_BL_RESP_REPORT_ID || + !GEN5_CMD_COMPLETE_SUCCESS(resp_data[5])) + return error < 0 ? error : -EAGAIN; + + return 0; +} + +static int cyapa_gen5_do_fw_update(struct cyapa *cyapa, + const struct firmware *fw) +{ + struct device *dev = &cyapa->client->dev; + struct cyapa_tsg_bin_image_data_record *flash_record; + struct cyapa_tsg_bin_image *image = + (struct cyapa_tsg_bin_image *)fw->data; + int flash_records_count; + int i; + int error; + + cyapa_empty_pip_output_data(cyapa, NULL, NULL, NULL); + + flash_records_count = + (fw->size - sizeof(struct cyapa_tsg_bin_image_head)) / + sizeof(struct cyapa_tsg_bin_image_data_record); + /* + * The last flash row 0x01ff has been written through bl_initiate + * command, so DO NOT write flash 0x01ff to trackpad device. + */ + for (i = 0; i < (flash_records_count - 1); i++) { + flash_record = &image->records[i]; + error = cyapa_gen5_write_fw_block(cyapa, flash_record); + if (error) { + dev_err(dev, "%s: Gen5 FW update aborted: %d\n", + __func__, error); + return error; + } + } + + return 0; +} + static int cyapa_gen5_change_power_state(struct cyapa *cyapa, u8 power_state) { u8 cmd[8] = { 0x04, 0x00, 0x06, 0x00, 0x2f, 0x00, 0x08, 0x01 }; @@ -1665,7 +2046,17 @@ static int cyapa_gen5_irq_handler(struct cyapa *cyapa) return 0; } +static int cyapa_gen5_bl_activate(struct cyapa *cyapa) { return 0; } +static int cyapa_gen5_bl_deactivate(struct cyapa *cyapa) { return 0; } + const struct cyapa_dev_ops cyapa_gen5_ops = { + .check_fw = cyapa_gen5_check_fw, + .bl_enter = cyapa_gen5_bl_enter, + .bl_initiate = cyapa_gen5_bl_initiate, + .update_fw = cyapa_gen5_do_fw_update, + .bl_activate = cyapa_gen5_bl_activate, + .bl_deactivate = cyapa_gen5_bl_deactivate, + .initialize = cyapa_gen5_initialize, .state_parse = cyapa_gen5_state_parse, |