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Message-Id: <1422016530-24071-1-git-send-email-dusonlin@emc.com.tw>
Date: Fri, 23 Jan 2015 20:35:30 +0800
From: Duson Lin <dusonlin@....com.tw>
To: linux-kernel@...r.kernel.org, linux-input@...r.kernel.org,
dmitry.torokhov@...il.com
Cc: phoenix@....com.tw, Duson Lin <dusonlin@....com.tw>
Subject: [PATCH] Input: elan_i2c - Compare signature metadata before update fw
To match different firmware file format, we replace original firmware file size
checking with the signature metadata comparison when update firmware, If failed,
the update will be aborted.
Signed-off-by: Duson Lin <dusonlin@....com.tw>
---
drivers/input/mouse/elan_i2c.h | 6 +++---
drivers/input/mouse/elan_i2c_core.c | 23 +++++++++++++----------
drivers/input/mouse/elan_i2c_i2c.c | 1 -
drivers/input/mouse/elan_i2c_smbus.c | 1 -
4 files changed, 16 insertions(+), 15 deletions(-)
diff --git a/drivers/input/mouse/elan_i2c.h b/drivers/input/mouse/elan_i2c.h
index 2e83862..e100c1b 100644
--- a/drivers/input/mouse/elan_i2c.h
+++ b/drivers/input/mouse/elan_i2c.h
@@ -4,7 +4,6 @@
* Copyright (c) 2013 ELAN Microelectronics Corp.
*
* Author: 林政維 (Duson Lin) <dusonlin@....com.tw>
- * Version: 1.5.5
*
* Based on cyapa driver:
* copyright (c) 2011-2012 Cypress Semiconductor, Inc.
@@ -33,8 +32,9 @@
#define ETP_FW_IAP_PAGE_ERR (1 << 5)
#define ETP_FW_IAP_INTF_ERR (1 << 4)
#define ETP_FW_PAGE_SIZE 64
-#define ETP_FW_PAGE_COUNT 768
-#define ETP_FW_SIZE (ETP_FW_PAGE_SIZE * ETP_FW_PAGE_COUNT)
+#define ETP_FW_VAILDPAGE_COUNT 768
+#define ETP_FW_SIGNATURE_SIZE 6
+#define ETP_FW_SIGNATURE_ADDRESS 0xBFFA
struct i2c_client;
struct completion;
diff --git a/drivers/input/mouse/elan_i2c_core.c b/drivers/input/mouse/elan_i2c_core.c
index 0cb2be4..16f9584 100644
--- a/drivers/input/mouse/elan_i2c_core.c
+++ b/drivers/input/mouse/elan_i2c_core.c
@@ -4,7 +4,7 @@
* Copyright (c) 2013 ELAN Microelectronics Corp.
*
* Author: 林政維 (Duson Lin) <dusonlin@....com.tw>
- * Version: 1.5.5
+ * Version: 1.5.6
*
* Based on cyapa driver:
* copyright (c) 2011-2012 Cypress Semiconductor, Inc.
@@ -40,7 +40,7 @@
#include "elan_i2c.h"
#define DRIVER_NAME "elan_i2c"
-#define ELAN_DRIVER_VERSION "1.5.5"
+#define ELAN_DRIVER_VERSION "1.5.6"
#define ETP_PRESSURE_OFFSET 25
#define ETP_MAX_PRESSURE 255
#define ETP_FWIDTH_REDUCE 90
@@ -312,7 +312,7 @@ static int __elan_update_firmware(struct elan_tp_data *data,
iap_start_addr = get_unaligned_le16(&fw->data[ETP_IAP_START_ADDR * 2]);
boot_page_count = (iap_start_addr * 2) / ETP_FW_PAGE_SIZE;
- for (i = boot_page_count; i < ETP_FW_PAGE_COUNT; i++) {
+ for (i = boot_page_count; i < ETP_FW_VAILDPAGE_COUNT; i++) {
u16 checksum = 0;
const u8 *page = &fw->data[i * ETP_FW_PAGE_SIZE];
@@ -434,10 +434,11 @@ static ssize_t elan_sysfs_update_fw(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct elan_tp_data *data = i2c_get_clientdata(client);
+ struct elan_tp_data *data = dev_get_drvdata(dev);
const struct firmware *fw;
int error;
+ const u8 *fw_signature;
+ static const u8 signature[] = {0xAA, 0x55, 0xCC, 0x33, 0xFF, 0xFF};
error = request_firmware(&fw, ETP_FW_NAME, dev);
if (error) {
@@ -446,10 +447,12 @@ static ssize_t elan_sysfs_update_fw(struct device *dev,
return error;
}
- /* Firmware must be exactly PAGE_NUM * PAGE_SIZE bytes */
- if (fw->size != ETP_FW_SIZE) {
- dev_err(dev, "invalid firmware size = %zu, expected %d.\n",
- fw->size, ETP_FW_SIZE);
+ /* Firmware file must match signature data */
+ fw_signature = &fw->data[ETP_FW_SIGNATURE_ADDRESS];
+ if (memcmp(fw_signature, signature, sizeof(signature)) != 0) {
+ dev_err(dev, "signature mismatch (expected %*ph, got %*ph)\n",
+ (int)sizeof(signature), signature,
+ (int)sizeof(signature), fw_signature);
error = -EBADF;
goto out_release_fw;
}
@@ -464,7 +467,7 @@ static ssize_t elan_sysfs_update_fw(struct device *dev,
out_release_fw:
release_firmware(fw);
- return error ?: count;
+ return error?: count;
}
static ssize_t calibrate_store(struct device *dev,
diff --git a/drivers/input/mouse/elan_i2c_i2c.c b/drivers/input/mouse/elan_i2c_i2c.c
index 97d4937..029941f 100644
--- a/drivers/input/mouse/elan_i2c_i2c.c
+++ b/drivers/input/mouse/elan_i2c_i2c.c
@@ -4,7 +4,6 @@
* Copyright (c) 2013 ELAN Microelectronics Corp.
*
* Author: 林政維 (Duson Lin) <dusonlin@....com.tw>
- * Version: 1.5.5
*
* Based on cyapa driver:
* copyright (c) 2011-2012 Cypress Semiconductor, Inc.
diff --git a/drivers/input/mouse/elan_i2c_smbus.c b/drivers/input/mouse/elan_i2c_smbus.c
index 359bf85..5cd4a05 100644
--- a/drivers/input/mouse/elan_i2c_smbus.c
+++ b/drivers/input/mouse/elan_i2c_smbus.c
@@ -4,7 +4,6 @@
* Copyright (c) 2013 ELAN Microelectronics Corp.
*
* Author: 林政維 (Duson Lin) <dusonlin@....com.tw>
- * Version: 1.5.5
*
* Based on cyapa driver:
* copyright (c) 2011-2012 Cypress Semiconductor, Inc.
--
1.7.10.4
--
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