[PATCH 1/2] staging/gdm72xx: usb_boot: replace firmware upgrade API
Macpaul Lin
macpaul at gmail.com
Wed Sep 12 09:49:23 UTC 2012
1. Replace file I/O of reading firmware by request_firmware().
2. Coding style clean up.
Signed-off-by: Macpaul Lin <macpaul at gmail.com>
Cc: Paul Stewart <pstew at chromium.org>
Cc: Ben Chan <benchan at chromium.org>
Cc: Sage Ahn <syahn at gctsemi.com>
Cc: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
---
drivers/staging/gdm72xx/usb_boot.c | 207 ++++++++++++++++++-------------------
1 file changed, 99 insertions(+), 108 deletions(-)
diff --git a/drivers/staging/gdm72xx/usb_boot.c b/drivers/staging/gdm72xx/usb_boot.c
index e3dbd5a..e1cd017 100644
--- a/drivers/staging/gdm72xx/usb_boot.c
+++ b/drivers/staging/gdm72xx/usb_boot.c
@@ -18,25 +18,29 @@
#include <linux/usb.h>
#include <linux/unistd.h>
#include <linux/slab.h>
+#include <linux/firmware.h>
#include <asm/byteorder.h>
#include "gdm_usb.h"
#include "usb_boot.h"
-#define DN_KERNEL_MAGIC_NUMBER 0x10760001
-#define DN_ROOTFS_MAGIC_NUMBER 0x10760002
+#define DN_KERNEL_MAGIC_NUMBER 0x10760001
+#define DN_ROOTFS_MAGIC_NUMBER 0x10760002
-#define DOWNLOAD_SIZE 1024
+#define DOWNLOAD_SIZE 1024
-#define DH2B(x) __cpu_to_be32(x)
-#define DL2H(x) __le32_to_cpu(x)
+#define DH2B(x) __cpu_to_be32(x)
+#define DL2H(x) __le32_to_cpu(x)
-#define MIN(a, b) ((a) > (b) ? (b) : (a))
+#define MIN(a, b) ((a) > (b) ? (b) : (a))
#define MAX_IMG_CNT 16
-#define UIMG_PATH "/lib/firmware/gdm72xx/gdmuimg.bin"
-#define KERN_PATH "/lib/firmware/gdm72xx/zImage"
-#define FS_PATH "/lib/firmware/gdm72xx/ramdisk.jffs2"
+
+#define FW_DIR "gdm72xx/"
+
+#define FW_UIMG "gdmuimg.bin"
+#define FW_KERN "zImage"
+#define FW_FS "ramdisk.jffs2"
struct dn_header {
u32 magic_num;
@@ -44,23 +48,23 @@ struct dn_header {
};
struct img_header {
- u32 magic_code;
- u32 count;
- u32 len;
- u32 offset[MAX_IMG_CNT];
+ u32 magic_code;
+ u32 count;
+ u32 len;
+ u32 offset[MAX_IMG_CNT];
char hostname[32];
char date[32];
};
struct fw_info {
- u32 id;
- u32 len;
- u32 kernel_len;
- u32 rootfs_len;
- u32 kernel_offset;
- u32 rootfs_offset;
- u32 fw_ver;
- u32 mac_ver;
+ u32 id;
+ u32 len;
+ u32 kernel_len;
+ u32 rootfs_len;
+ u32 kernel_offset;
+ u32 rootfs_offset;
+ u32 fw_ver;
+ u32 mac_ver;
char hostname[32];
char userid[16];
char date[32];
@@ -107,13 +111,13 @@ static int gdm_wibro_recv(struct usb_device *usbdev, void *data, int len)
return 0;
}
-static int download_image(struct usb_device *usbdev, struct file *filp,
- loff_t *pos, u32 img_len, u32 magic_num)
+static int download_image(struct usb_device *usbdev,
+ const struct firmware *firm,
+ loff_t pos, u32 img_len, u32 magic_num)
{
struct dn_header h;
int ret = 0;
u32 size;
- int len, readn;
size = (img_len + DOWNLOAD_SIZE - 1) & ~(DOWNLOAD_SIZE - 1);
h.magic_num = DH2B(magic_num);
@@ -123,43 +127,43 @@ static int download_image(struct usb_device *usbdev, struct file *filp,
if (ret < 0)
goto out;
- readn = 0;
- while ((len = filp->f_op->read(filp, tx_buf, DOWNLOAD_SIZE, pos))) {
-
- if (len < 0) {
- ret = -1;
+ while (img_len > 0) {
+ if (img_len > DOWNLOAD_SIZE) {
+ memcpy(tx_buf, firm->data + pos, DOWNLOAD_SIZE);
+ ret = gdm_wibro_send(usbdev, tx_buf, DOWNLOAD_SIZE);
+ } else { /* the last chuch of data */
+ memcpy(tx_buf, firm->data + pos, img_len);
+ ret = gdm_wibro_send(usbdev, tx_buf, img_len);
goto out;
}
- readn += len;
- ret = gdm_wibro_send(usbdev, tx_buf, DOWNLOAD_SIZE);
+ img_len -= DOWNLOAD_SIZE;
+ pos += DOWNLOAD_SIZE;
+
if (ret < 0)
goto out;
- if (readn >= img_len)
- break;
}
- if (readn < img_len) {
- printk(KERN_ERR "gdmwm: Cannot read to the requested size. "
- "Read = %d Requested = %d\n", readn, img_len);
- ret = -EIO;
- }
out:
-
return ret;
}
int usb_boot(struct usb_device *usbdev, u16 pid)
{
int i, ret = 0;
- struct file *filp = NULL;
- struct inode *inode = NULL;
- static mm_segment_t fs;
struct img_header hdr;
struct fw_info fw_info;
loff_t pos = 0;
- char *img_name = UIMG_PATH;
- int len;
+ char *img_name = FW_DIR FW_UIMG;
+ const struct firmware *firm;
+
+ ret = request_firmware(&firm, img_name, &usbdev->dev);
+ if (ret < 0) {
+ printk(KERN_ERR
+ "requesting firmware %s failed with error %d\n",
+ img_name, ret);
+ return ret;
+ }
tx_buf = kmalloc(DOWNLOAD_SIZE, GFP_KERNEL);
if (tx_buf == NULL) {
@@ -167,29 +171,12 @@ int usb_boot(struct usb_device *usbdev, u16 pid)
return -ENOMEM;
}
- fs = get_fs();
- set_fs(get_ds());
-
- filp = filp_open(img_name, O_RDONLY | O_LARGEFILE, 0);
- if (IS_ERR(filp)) {
- printk(KERN_ERR "Can't find %s.\n", img_name);
- ret = PTR_ERR(filp);
- goto restore_fs;
- }
-
- inode = filp->f_dentry->d_inode;
- if (!S_ISREG(inode->i_mode)) {
- printk(KERN_ERR "Invalid file type: %s\n", img_name);
- ret = -EINVAL;
- goto out;
- }
-
- len = filp->f_op->read(filp, (u8 *)&hdr, sizeof(hdr), &pos);
- if (len != sizeof(hdr)) {
+ if (firm->size < sizeof(hdr)) {
printk(KERN_ERR "gdmwm: Cannot read the image info.\n");
ret = -EIO;
goto out;
}
+ memcpy((u8 *)&hdr, firm->data, sizeof(hdr));
array_le32_to_cpu((u32 *)&hdr, 19);
#if 0
@@ -217,13 +204,12 @@ int usb_boot(struct usb_device *usbdev, u16 pid)
}
pos = hdr.offset[i];
- len = filp->f_op->read(filp, (u8 *)&fw_info, sizeof(fw_info),
- &pos);
- if (len != sizeof(fw_info)) {
+ if (firm->size < sizeof(fw_info) + pos) {
printk(KERN_ERR "gdmwm: Cannot read the FW info.\n");
ret = -EIO;
goto out;
}
+ memcpy((u8 *)&fw_info, firm->data + pos, sizeof(fw_info));
array_le32_to_cpu((u32 *)&fw_info, 8);
#if 0
@@ -239,14 +225,23 @@ int usb_boot(struct usb_device *usbdev, u16 pid)
continue;
pos = hdr.offset[i] + fw_info.kernel_offset;
- ret = download_image(usbdev, filp, &pos, fw_info.kernel_len,
- DN_KERNEL_MAGIC_NUMBER);
+ if (firm->size < fw_info.kernel_len + pos) {
+ printk(KERN_ERR "gdmwm: Kernel FW is too small.\n");
+ goto out;
+ }
+
+ ret = download_image(usbdev, firm, pos,
+ fw_info.kernel_len, DN_KERNEL_MAGIC_NUMBER);
if (ret < 0)
goto out;
printk(KERN_INFO "GCT: Kernel download success.\n");
pos = hdr.offset[i] + fw_info.rootfs_offset;
- ret = download_image(usbdev, filp, &pos, fw_info.rootfs_len,
+ if (firm->size < fw_info.rootfs_len + pos) {
+ printk(KERN_ERR "gdmwm: Filesystem FW is too small.\n");
+ goto out;
+ }
+ ret = download_image(usbdev, firm, pos, fw_info.rootfs_len,
DN_ROOTFS_MAGIC_NUMBER);
if (ret < 0)
goto out;
@@ -260,10 +255,8 @@ int usb_boot(struct usb_device *usbdev, u16 pid)
ret = -EINVAL;
}
out:
- filp_close(filp, NULL);
-
-restore_fs:
- set_fs(fs);
+ release_firmware(firm);
+ firm = NULL;
kfree(tx_buf);
return ret;
}
@@ -293,38 +286,27 @@ out:
return ret;
}
-static int em_download_image(struct usb_device *usbdev, char *path,
+static int em_download_image(struct usb_device *usbdev, char *img_name,
char *type_string)
{
- struct file *filp;
- struct inode *inode;
- static mm_segment_t fs;
char *buf = NULL;
loff_t pos = 0;
int ret = 0;
- int len, readn = 0;
+ int len = 0;
+ int img_len = 0;
+ const struct firmware *firm;
#if defined(GDM7205_PADDING)
const int pad_size = GDM7205_PADDING;
#else
const int pad_size = 0;
#endif
- fs = get_fs();
- set_fs(get_ds());
-
- filp = filp_open(path, O_RDONLY | O_LARGEFILE, 0);
- if (IS_ERR(filp)) {
- printk(KERN_ERR "Can't find %s.\n", path);
- set_fs(fs);
- ret = -ENOENT;
- goto restore_fs;
- }
-
- inode = filp->f_dentry->d_inode;
- if (!S_ISREG(inode->i_mode)) {
- printk(KERN_ERR "Invalid file type: %s\n", path);
- ret = -EINVAL;
- goto out;
+ ret = request_firmware(&firm, img_name, &usbdev->dev);
+ if (ret < 0) {
+ printk(KERN_ERR
+ "requesting firmware %s failed with error %d\n",
+ img_name, ret);
+ return ret;
}
buf = kmalloc(DOWNLOAD_CHUCK + pad_size, GFP_KERNEL);
@@ -338,15 +320,25 @@ static int em_download_image(struct usb_device *usbdev, char *path,
if (ret < 0)
goto out;
- while ((len = filp->f_op->read(filp, buf+pad_size, DOWNLOAD_CHUCK,
- &pos))) {
- if (len < 0) {
- ret = -1;
- goto out;
+ img_len = firm->size;
+
+ if (img_len <= 0) {
+ ret = -1;
+ goto out;
+ }
+
+ while (img_len > 0) {
+ if (img_len > DOWNLOAD_CHUCK) {
+ memcpy(buf+pad_size, firm->data + pos, DOWNLOAD_CHUCK);
+ ret = gdm_wibro_send(usbdev, buf, len+pad_size);
+ } else { /* the last chuch of data */
+ memcpy(buf+pad_size, firm->data + pos, img_len);
+ ret = gdm_wibro_send(usbdev, buf, len+pad_size);
}
- readn += len;
- ret = gdm_wibro_send(usbdev, buf, len+pad_size);
+ img_len -= DOWNLOAD_CHUCK;
+ pos += DOWNLOAD_CHUCK;
+
if (ret < 0)
goto out;
@@ -360,11 +352,8 @@ static int em_download_image(struct usb_device *usbdev, char *path,
goto out;
out:
- filp_close(filp, NULL);
-
-restore_fs:
- set_fs(fs);
-
+ release_firmware(firm);
+ firm = NULL;
kfree(buf);
return ret;
@@ -382,13 +371,15 @@ static int em_fw_reset(struct usb_device *usbdev)
int usb_emergency(struct usb_device *usbdev)
{
int ret;
+ char *kern_name = FW_DIR FW_KERN;
+ char *fs_name = FW_DIR FW_FS;
- ret = em_download_image(usbdev, KERN_PATH, KERNEL_TYPE_STRING);
+ ret = em_download_image(usbdev, kern_name, KERNEL_TYPE_STRING);
if (ret < 0)
goto out;
printk(KERN_INFO "GCT Emergency: Kernel download success.\n");
- ret = em_download_image(usbdev, FS_PATH, FS_TYPE_STRING);
+ ret = em_download_image(usbdev, fs_name, FS_TYPE_STRING);
if (ret < 0)
goto out;
printk(KERN_INFO "GCT Emergency: Filesystem download success.\n");
--
1.7.11.2.138.g2b53359
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