Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755080AbaKSIl4 (ORCPT ); Wed, 19 Nov 2014 03:41:56 -0500 Received: from mail-pa0-f51.google.com ([209.85.220.51]:38937 "EHLO mail-pa0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751314AbaKSIlx (ORCPT ); Wed, 19 Nov 2014 03:41:53 -0500 From: Dudley Du To: dmitry.torokhov@gmail.com, rydberg@euromail.se Cc: Dudley Du , bleung@google.com, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v11 16/19] input: cyapa: add gen5 trackpad device read firmware image function support Date: Wed, 19 Nov 2014 16:37:48 +0800 Message-Id: <1416386271-28167-17-git-send-email-dudley.dulixin@gmail.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1416386271-28167-1-git-send-email-dudley.dulixin@gmail.com> References: <1416386271-28167-1-git-send-email-dudley.dulixin@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add read firmware image function supported for gen5 trackpad device, it can be used through debugfs read_fw interface. TEST=test on Chromebooks. Signed-off-by: Dudley Du --- drivers/input/mouse/cyapa.h | 1 + drivers/input/mouse/cyapa_gen5.c | 155 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 156 insertions(+) diff --git a/drivers/input/mouse/cyapa.h b/drivers/input/mouse/cyapa.h index ceed843..b6e1b22 100644 --- a/drivers/input/mouse/cyapa.h +++ b/drivers/input/mouse/cyapa.h @@ -305,6 +305,7 @@ struct cyapa { /* Buffer to store firmware read using debugfs */ struct mutex debugfs_mutex; + struct cyapa_tsg_bin_image_head fw_img_head; u8 *fw_image; size_t fw_image_size; diff --git a/drivers/input/mouse/cyapa_gen5.c b/drivers/input/mouse/cyapa_gen5.c index 51bdf06..aee3e57 100644 --- a/drivers/input/mouse/cyapa_gen5.c +++ b/drivers/input/mouse/cyapa_gen5.c @@ -1210,6 +1210,154 @@ static int cyapa_gen5_write_fw_block(struct cyapa *cyapa, return 0; } +static int cyapa_gen5_read_fw_bytes(struct cyapa *cyapa, u16 row_num, u8 *data) +{ + u8 cmd[16]; + size_t cmd_len; + u8 resp_data[CYAPA_TSG_FW_ROW_SIZE / 2 + GEN5_MIN_BL_RESP_LENGTH]; + int resp_len; + u16 offset; + u16 cmd_crc; + struct cyapa_tsg_bin_image_data_record *fw_img_record; + int error; + + fw_img_record = (struct cyapa_tsg_bin_image_data_record *)data; + + cmd[0] = 0x04; /* Register address */ + cmd[1] = 0x00; + cmd[2] = 0x0e; + cmd[3] = 0x00; + cmd[4] = 0x40; /* Report id 40h */ + cmd[5] = 0x00; + cmd[6] = GEN5_SOP_KEY; + cmd[7] = 0x3d; /* Read application image command code */ + cmd[8] = 0x03; + cmd[9] = 0x00; + offset = row_num * CYAPA_TSG_FW_ROW_SIZE - + CYAPA_TSG_START_OF_APPLICATION; + put_unaligned_le16(offset, &cmd[10]); + cmd[12] = CYAPA_TSG_IMG_READ_SIZE; + cmd_crc = crc_itu_t(0xffff, &cmd[6], 7); + put_unaligned_le16(cmd_crc, &cmd[13]); /* CRC[15:0] */ + cmd[15] = GEN5_EOP_KEY; /* EOP = 17h */ + cmd_len = 16; + + resp_len = CYAPA_TSG_IMG_READ_SIZE + GEN5_MIN_BL_RESP_LENGTH; + error = cyapa_i2c_pip_cmd_irq_sync(cyapa, + cmd, cmd_len, + resp_data, &resp_len, + 50, cyapa_gen5_sort_tsg_pip_bl_resp_data, true); + if (resp_len != (CYAPA_TSG_IMG_READ_SIZE + GEN5_MIN_BL_RESP_LENGTH) || + error || resp_data[2] != GEN5_BL_RESP_REPORT_ID || + !GEN5_CMD_COMPLETE_SUCCESS(resp_data[5])) + return error ? error : -EAGAIN; + + /* Copy first 64 bytes in the row. */ + memcpy(&fw_img_record->record_data[0], &resp_data[8], + CYAPA_TSG_IMG_READ_SIZE); + + if (row_num == CYAPA_TSG_IMG_APP_INTEGRITY_ROW_NUM) { + /* Last row's rest 64 bytes are bootloader metadata, + * it's not allowed to be read out, will respond with error. */ + memset(&fw_img_record->record_data[CYAPA_TSG_IMG_READ_SIZE], + 0, CYAPA_TSG_IMG_READ_SIZE); + goto skip_last_row; + } + + /* Read next 64 bytes in the row. */ + offset = offset + CYAPA_TSG_IMG_READ_SIZE; + put_unaligned_le16(offset, &cmd[10]); + cmd_crc = crc_itu_t(0xffff, &cmd[6], 7); + put_unaligned_le16(cmd_crc, &cmd[13]); /* CRC[15:0] */ + 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 (resp_len != (CYAPA_TSG_IMG_READ_SIZE + GEN5_MIN_BL_RESP_LENGTH) || + error || resp_data[2] != GEN5_BL_RESP_REPORT_ID || + !GEN5_CMD_COMPLETE_SUCCESS(resp_data[5])) + return error ? error : -EAGAIN; + + /* Copy last 64 bytes in the row. */ + memcpy(&fw_img_record->record_data[CYAPA_TSG_IMG_READ_SIZE], + &resp_data[8], CYAPA_TSG_IMG_READ_SIZE); + +skip_last_row: + fw_img_record->flash_array_id = 0; + put_unaligned_be16(row_num, &fw_img_record->row_number); + put_unaligned_be16(CYAPA_TSG_FW_ROW_SIZE, &fw_img_record->record_len); + + return 0; +} + +static int cyapa_gen5_read_fw(struct cyapa *cyapa) +{ + int fw_img_head_size; + int fw_img_record_size; + int fw_img_size; + int row_index; + int array_index; + u32 img_start; + u16 img_len; + u16 img_start_row; + u16 img_end_row; + struct cyapa_tsg_bin_image_data_record app_integrity; + u8 *record_data; + int error; + + error = cyapa_gen5_bl_enter(cyapa); + if (error) + return error; + + cyapa_empty_pip_output_data(cyapa, NULL, NULL, NULL); + + fw_img_head_size = sizeof(struct cyapa_tsg_bin_image_head); + fw_img_record_size = sizeof(struct cyapa_tsg_bin_image_data_record); + + /* Read app integrity block data. */ + row_index = CYAPA_TSG_IMG_APP_INTEGRITY_ROW_NUM; + error = cyapa_gen5_read_fw_bytes(cyapa, + row_index, (u8 *)&app_integrity); + if (error) + return error; + img_start = get_unaligned_le32(&app_integrity.record_data[16]); + img_len = get_unaligned_le16(&app_integrity.record_data[20]); + if ((img_start + img_len) % CYAPA_TSG_FW_ROW_SIZE) + return -EINVAL; + img_start_row = img_start / CYAPA_TSG_FW_ROW_SIZE; + img_end_row = (img_start + img_len) / CYAPA_TSG_FW_ROW_SIZE - 1; + + /* Allocate memory for image. */ + fw_img_size = fw_img_head_size + + (img_end_row - img_start_row + 2) * fw_img_record_size; + cyapa->fw_image = cyapa->fw_image ? cyapa->fw_image : + devm_kzalloc(&cyapa->client->dev, fw_img_size, GFP_KERNEL); + if (!cyapa->fw_image) + return -ENOMEM; + + /* Set image head data. */ + memcpy(cyapa->fw_image, &cyapa->fw_img_head, fw_img_head_size); + + /* Read image blocks. */ + for (row_index = img_start_row, array_index = 0; + row_index <= img_end_row; + row_index++, array_index++) { + record_data = &cyapa->fw_image[fw_img_head_size + + array_index * fw_img_record_size]; + error = cyapa_gen5_read_fw_bytes(cyapa, row_index, record_data); + if (error) + return error; + } + + /* Append last app integrity block data. */ + record_data = &cyapa->fw_image[fw_img_head_size + + array_index * fw_img_record_size]; + memcpy(record_data, &app_integrity, fw_img_record_size); + + cyapa->fw_image_size = fw_img_size; + return 0; +} + static int cyapa_gen5_do_fw_update(struct cyapa *cyapa, const struct firmware *fw) { @@ -2288,6 +2436,11 @@ static int cyapa_gen5_get_query_data(struct cyapa *cyapa) if (error || resp_len < sizeof(resp_data)) return error ? error : -EIO; + cyapa->fw_img_head.head_size = + sizeof(struct cyapa_tsg_bin_image_head) - 1; + memcpy(&cyapa->fw_img_head.ttda_driver_major_version, + &resp_data[5], cyapa->fw_img_head.head_size); + product_family = get_unaligned_le16(&resp_data[7]); if ((product_family & GEN5_PRODUCT_FAMILY_MASK) != GEN5_PRODUCT_FAMILY_TRACKPAD) @@ -2622,6 +2775,8 @@ const struct cyapa_dev_ops cyapa_gen5_ops = { .show_baseline = cyapa_gen5_show_baseline, .calibrate_store = cyapa_gen5_do_calibrate, + .read_fw = cyapa_gen5_read_fw, + .initialize = cyapa_gen5_initialize, .state_parse = cyapa_gen5_state_parse, -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/