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Subject[PATCH v2 11/14] input: cyapa: add gen5 trackpad device firmware update function supported
Date
Add firmware image update function supported for gen5 trackpad device,
which its function is supplied through cyapa core update_fw interface.
TEST=test on Chomebooks.

Signed-off-by: Du, Dudley <dudl@cypress.com>
---
diff --git a/drivers/input/mouse/Kconfig b/drivers/input/mouse/Kconfig
index 6b8441f..e484569 100644
--- a/drivers/input/mouse/Kconfig
+++ b/drivers/input/mouse/Kconfig
@@ -205,7 +205,7 @@ config MOUSE_BCM5974

config MOUSE_CYAPA
tristate "Cypress APA I2C Trackpad support"
- depends on I2C
+ depends on I2C && 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 00ca3a6..e720eed 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"


@@ -856,6 +857,86 @@ out:
return -EAGAIN;
}

+static int cyapa_gen5_bl_initiate(struct cyapa *cyapa,
+ const struct firmware *fw)
+{
+ int ret = 0;
+ u16 length = 0;
+ u16 data_len = 0;
+ u16 meta_data_crc = 0;
+ u16 cmd_crc = 0;
+ u8 bl_gen5_activate[18 + CYAPA_TSG_FLASH_MAP_BLOCK_SIZE + 3];
+ int bl_gen5_activate_size = 0;
+ u8 resp_data[11];
+ int resp_len;
+ struct cyapa_tsg_bin_image *image;
+ int records_num;
+ u8 *data;
+
+ /* Try to dump all bufferred report data before send any command. */
+ cyapa_empty_pip_output_data(cyapa, NULL, NULL, NULL);
+
+ bl_gen5_activate_size = sizeof(bl_gen5_activate);
+ memset(bl_gen5_activate, 0, bl_gen5_activate_size);
+
+ /* Output Report Register Address[15:0] = 0004h */
+ bl_gen5_activate[0] = 0x04;
+ bl_gen5_activate[1] = 0x00;
+
+ /* totoal command length[15:0] */
+ length = bl_gen5_activate_size - 2;
+ put_unaligned_le16(length, &bl_gen5_activate[2]);
+ bl_gen5_activate[4] = 0x40; /* Report ID = 40h */
+ bl_gen5_activate[5] = 0x00; /* RSVD = 00h */
+
+ bl_gen5_activate[6] = GEN5_SOP_KEY; /* SOP = 01h */
+ bl_gen5_activate[7] = 0x48; /* Command Code = 48h */
+
+ /* 8 Key bytes and block size */
+ data_len = CYAPA_TSG_BL_KEY_SIZE + CYAPA_TSG_FLASH_MAP_BLOCK_SIZE;
+ /* Data Length[15:0] */
+ put_unaligned_le16(data_len, &bl_gen5_activate[8]);
+ bl_gen5_activate[10] = 0xa5; /* Key Byte 0 */
+ bl_gen5_activate[11] = 0x01;
+ bl_gen5_activate[12] = 0x02; /* . */
+ bl_gen5_activate[13] = 0x03; /* . */
+ bl_gen5_activate[14] = 0xff; /* . */
+ bl_gen5_activate[15] = 0xfe;
+ bl_gen5_activate[16] = 0xfd;
+ bl_gen5_activate[17] = 0x5a; /* Key Byte 7 */
+
+ /* 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(&bl_gen5_activate[18], data, CYAPA_TSG_FLASH_MAP_METADATA_SIZE);
+
+ meta_data_crc = crc_itu_t(0xffff, &bl_gen5_activate[18],
+ CYAPA_TSG_FLASH_MAP_METADATA_SIZE);
+ /* Meta Data CRC[15:0] */
+ put_unaligned_le16(meta_data_crc,
+ &bl_gen5_activate[18 + CYAPA_TSG_FLASH_MAP_METADATA_SIZE]);
+
+ cmd_crc = crc_itu_t(0xffff, &bl_gen5_activate[6], 4 + data_len);
+ put_unaligned_le16(cmd_crc,
+ &bl_gen5_activate[bl_gen5_activate_size - 3]); /* CRC[15:0] */
+ bl_gen5_activate[bl_gen5_activate_size - 1] = GEN5_EOP_KEY;
+
+ resp_len = sizeof(resp_data);
+ ret = cyapa_i2c_pip_cmd_irq_sync(cyapa,
+ bl_gen5_activate, sizeof(bl_gen5_activate),
+ resp_data, &resp_len, 12000,
+ cyapa_gen5_sort_tsg_pip_bl_resp_data);
+ if (ret || resp_len != GEN5_BL_INITIATE_RESP_LEN ||
+ resp_data[2] != GEN5_BL_RESP_REPORT_ID ||
+ !GEN5_CMD_COMPLETE_SUCCESS(resp_data[5]))
+ return (ret < 0) ? ret : -EAGAIN;
+
+ return 0;
+}
+
bool cyapa_gen5_sort_bl_exit_data(struct cyapa *cyapa, u8 *buf, int len)
{
if (buf == NULL || len < GEN5_RESP_LENGTH_SIZE)
@@ -902,6 +983,216 @@ static int cyapa_gen5_bl_exit(struct cyapa *cyapa)
return -EAGAIN;
}

+static int cyapa_gen5_bl_enter(struct cyapa *cyapa)
+{
+ int ret;
+ u8 cmd[] = { 0x04, 0x00, 0x05, 0x00, 0x2F, 0x00, 0x01 };
+ u8 resp_data[2];
+ int resp_len;
+
+ if (cyapa->input) {
+ cyapa_disable_irq(cyapa);
+ input_unregister_device(cyapa->input);
+ cyapa->input = NULL;
+ }
+ cyapa_enable_irq(cyapa);
+
+ ret = cyapa_poll_state(cyapa, 500);
+ if (ret < 0)
+ return ret;
+ 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 bufferred report data before send any 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);
+ ret = cyapa_i2c_pip_cmd_irq_sync(cyapa,
+ cmd, sizeof(cmd),
+ resp_data, &resp_len,
+ 5000, cyapa_gen5_sort_application_launch_data);
+ if (ret || resp_data[0] != 0x00 || resp_data[1] != 0x00)
+ return (ret < 0) ? ret : -EAGAIN;
+
+ cyapa->state = CYAPA_STATE_GEN5_BL;
+ return 0;
+}
+
+static int cyapa_gen5_check_fw(struct cyapa *cyapa, const struct firmware *fw)
+{
+ int i;
+ struct cyapa_tsg_bin_image *image;
+ int flash_records_count;
+ u16 expected_app_crc;
+ u16 expected_app_integrity_crc;
+ u16 app_crc = 0;
+ u16 app_integrity_crc = 0;
+ u16 row_num;
+ u8 *data;
+ u32 app_start;
+ u16 app_len;
+ u32 img_start;
+ u16 img_len;
+ int record_index;
+ struct device *dev = &cyapa->client->dev;
+
+ 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: invaid app_integrity data.\n", __func__);
+ return -EINVAL;
+ }
+ data = image->records[flash_records_count - 1].record_data;
+ app_start = get_unaligned_le32(&data[4]);
+ app_len = get_unaligned_le16(&data[8]);
+ expected_app_crc = get_unaligned_le16(&data[10]);
+ img_start = get_unaligned_le32(&data[16]);
+ img_len = get_unaligned_le16(&data[20]);
+ expected_app_integrity_crc = get_unaligned_le16(&data[60]);
+
+ if ((app_start + app_len + img_start + img_len) %
+ CYAPA_TSG_FW_ROW_SIZE) {
+ dev_err(dev, "%s: invaid 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 != expected_app_integrity_crc) {
+ dev_err(dev, "%s: invaid app_integrity crc.\n", __func__);
+ return -EINVAL;
+ }
+
+ /*
+ * verify application image CRC
+ */
+ record_index = 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 < (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 != expected_app_crc) {
+ dev_err(dev, "%s: invaid 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)
+{
+ u8 flash_array_id;
+ u16 flash_row_id;
+ u16 record_len;
+ u8 *record_data;
+ u8 cmd[144]; /* 13 + 128+ 3 */
+ u16 cmd_len;
+ u16 data_len;
+ u16 crc;
+ u8 resp_data[11];
+ int resp_len;
+ int ret;
+
+ 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;
+
+ cmd_len = sizeof(cmd) - 2; /* not include 2 bytes regisetr address. */
+ memset(cmd, 0, cmd_len + 2);
+ cmd[0] = 0x04; /* register address */
+ cmd[1] = 0x00;
+
+ put_unaligned_le16(cmd_len, &cmd[2]);
+ cmd[4] = 0x40; /* report id 40h */
+ cmd[5] = 0x00;
+
+ cmd[6] = GEN5_SOP_KEY; /* SOP = 01h */
+ cmd[7] = 0x39; /* command code = 39h */
+ /* 1 (Flash Array ID) + 2 (Flash Row ID) + 128 (flash data) */
+ data_len = 3 + record_len;
+ put_unaligned_le16(data_len, &cmd[8]);
+ cmd[10] = flash_array_id; /* Flash Array ID = 00h */
+ put_unaligned_le16(flash_row_id, &cmd[11]);
+
+ memcpy(&cmd[13], record_data, record_len);
+ crc = crc_itu_t(0xffff, &cmd[6], 4 + data_len);
+ put_unaligned_le16(crc, &cmd[2 + cmd_len - 3]);
+ cmd[2 + cmd_len - 1] = GEN5_EOP_KEY;
+
+ resp_len = sizeof(resp_data);
+ ret = cyapa_i2c_pip_cmd_irq_sync(cyapa,
+ cmd, sizeof(cmd),
+ resp_data, &resp_len,
+ 500, cyapa_gen5_sort_tsg_pip_bl_resp_data);
+ if (ret || resp_len != GEN5_BL_BLOCK_WRITE_RESP_LEN ||
+ resp_data[2] != GEN5_BL_RESP_REPORT_ID ||
+ !GEN5_CMD_COMPLETE_SUCCESS(resp_data[5]))
+ return ret < 0 ? ret : -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 *image =
+ (struct cyapa_tsg_bin_image *)fw->data;
+ struct cyapa_tsg_bin_image_data_record *flash_record;
+ int flash_records_count;
+ int i;
+ int ret;
+
+ /* Try to dump all bufferred data if exists before send commands. */
+ 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];
+ ret = cyapa_gen5_write_fw_block(cyapa, flash_record);
+ if (ret) {
+ dev_err(dev, "%s: Gen5 FW update aborted, %d\n",
+ __func__, ret);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
static int cyapa_gen5_change_power_state(struct cyapa *cyapa, u8 power_state)
{
int ret;
@@ -1568,11 +1859,11 @@ static void cyapa_gen5_irq_handler(struct cyapa *cyapa)
}

const struct cyapa_dev_ops cyapa_gen5_ops = {
+ cyapa_gen5_check_fw,
+ cyapa_gen5_bl_enter,
NULL,
- NULL,
- NULL,
- NULL,
- NULL,
+ cyapa_gen5_bl_initiate,
+ cyapa_gen5_do_fw_update,
NULL,
NULL,

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