[U-Boot] [PATCH v5 1/2] common: usb_storage: Make common function for usb_stor_read/usb_stor_write
Rajesh Bhagat
rajesh.bhagat at nxp.com
Mon Jun 13 06:03:13 CEST 2016
Performs code cleanup by making common function for usb_stor_read/
usb_stor_write. Currently only difference in these fucntions is call
to usb_read_10/usb_write_10 scsi commands.
Signed-off-by: Rajesh Bhagat <rajesh.bhagat at nxp.com>
---
Changes in v5:
- Converts USB_STOR_OPERATION_FUNC macro to a function
- Corrects the multi line comment accroding to coding style
- Renames variable to dev to remove code duplication
Changes in v4:
- Adds code to make common function for read/write
common/usb_storage.c | 129 +++++++++++++++----------------------------------
1 files changed, 40 insertions(+), 89 deletions(-)
diff --git a/common/usb_storage.c b/common/usb_storage.c
index 7e6e52d..f060637 100644
--- a/common/usb_storage.c
+++ b/common/usb_storage.c
@@ -1104,12 +1104,22 @@ static void usb_bin_fixup(struct usb_device_descriptor descriptor,
}
#endif /* CONFIG_USB_BIN_FIXUP */
+#define USB_STOR_OP_TYPE (is_write ? "write" : "read")
+static int usb_stor_operation(ccb *srb, struct us_data *ss, unsigned long start,
+ unsigned short blocks, bool is_write)
+{
+ return is_write ? usb_write_10(srb, ss, start, blocks) :
+ usb_read_10(srb, ss, start, blocks);
+}
+
#ifdef CONFIG_BLK
-static unsigned long usb_stor_read(struct udevice *dev, lbaint_t blknr,
- lbaint_t blkcnt, void *buffer)
+static unsigned long usb_stor_read_write(struct udevice *dev, lbaint_t blknr,
+ lbaint_t blkcnt, const void *buffer,
+ bool is_write)
#else
-static unsigned long usb_stor_read(struct blk_desc *block_dev, lbaint_t blknr,
- lbaint_t blkcnt, void *buffer)
+static unsigned long usb_stor_read_write(struct blk_desc *block_dev,
+ lbaint_t blknr, lbaint_t blkcnt,
+ const void *buffer, bool is_write)
#endif
{
lbaint_t start, blks;
@@ -1129,9 +1139,9 @@ static unsigned long usb_stor_read(struct blk_desc *block_dev, lbaint_t blknr,
#ifdef CONFIG_BLK
block_dev = dev_get_uclass_platdata(dev);
udev = dev_get_parent_priv(dev_get_parent(dev));
- debug("\nusb_read: udev %d\n", block_dev->devnum);
+ debug("\nusb_%s: udev %d\n", USB_STOR_OP_TYPE, block_dev->devnum);
#else
- debug("\nusb_read: udev %d\n", block_dev->devnum);
+ debug("\nusb_%s: udev %d\n", USB_STOR_OP_TYPE, block_dev->devnum);
udev = usb_dev_desc[block_dev->devnum].priv;
if (!udev) {
debug("%s: No device\n", __func__);
@@ -1146,11 +1156,15 @@ static unsigned long usb_stor_read(struct blk_desc *block_dev, lbaint_t blknr,
start = blknr;
blks = blkcnt;
- debug("\nusb_read: dev %d startblk " LBAF ", blccnt " LBAF " buffer %"
- PRIxPTR "\n", block_dev->devnum, start, blks, buf_addr);
+ debug("\nusb_%s: dev %d startblk " LBAF ", blccnt " LBAF " buffer %"
+ PRIxPTR "\n", USB_STOR_OP_TYPE, block_dev->devnum, start, blks,
+ buf_addr);
do {
- /* XXX need some comment here */
+ /*
+ * If read/write fails retry for max retry count else
+ * return with number of blocks written successfully.
+ */
retry = 2;
srb->pdata = (unsigned char *)buf_addr;
if (blks > USB_MAX_XFER_BLK)
@@ -1162,8 +1176,8 @@ retry_it:
usb_show_progress();
srb->datalen = block_dev->blksz * smallblks;
srb->pdata = (unsigned char *)buf_addr;
- if (usb_read_10(srb, ss, start, smallblks)) {
- debug("Read ERROR\n");
+ if (usb_stor_operation(srb, ss, start, smallblks, is_write)) {
+ debug("%s ERROR\n", USB_STOR_OP_TYPE);
usb_request_sense(srb, ss);
if (retry--)
goto retry_it;
@@ -1176,9 +1190,9 @@ retry_it:
} while (blks != 0);
ss->flags &= ~USB_READY;
- debug("usb_read: end startblk " LBAF
+ debug("usb_%s: end startblk " LBAF
", blccnt %x buffer %" PRIxPTR "\n",
- start, smallblks, buf_addr);
+ USB_STOR_OP_TYPE, start, smallblks, buf_addr);
usb_disable_asynch(0); /* asynch transfer allowed */
if (blkcnt >= USB_MAX_XFER_BLK)
@@ -1186,90 +1200,27 @@ retry_it:
return blkcnt;
}
+
#ifdef CONFIG_BLK
-static unsigned long usb_stor_write(struct udevice *dev, lbaint_t blknr,
- lbaint_t blkcnt, const void *buffer)
+static unsigned long usb_stor_read(struct udevice *dev, lbaint_t blknr,
+ lbaint_t blkcnt, void *buffer)
#else
-static unsigned long usb_stor_write(struct blk_desc *block_dev, lbaint_t blknr,
- lbaint_t blkcnt, const void *buffer)
+static unsigned long usb_stor_read(struct blk_desc *dev, lbaint_t blknr,
+ lbaint_t blkcnt, void *buffer)
#endif
{
- lbaint_t start, blks;
- uintptr_t buf_addr;
- unsigned short smallblks;
- struct usb_device *udev;
- struct us_data *ss;
- int retry;
- ccb *srb = &usb_ccb;
-#ifdef CONFIG_BLK
- struct blk_desc *block_dev;
-#endif
-
- if (blkcnt == 0)
- return 0;
+ return usb_stor_read_write(dev, blknr, blkcnt, buffer, false);
+}
- /* Setup device */
#ifdef CONFIG_BLK
- block_dev = dev_get_uclass_platdata(dev);
- udev = dev_get_parent_priv(dev_get_parent(dev));
- debug("\nusb_read: udev %d\n", block_dev->devnum);
+static unsigned long usb_stor_write(struct udevice *dev, lbaint_t blknr,
+ lbaint_t blkcnt, const void *buffer)
#else
- debug("\nusb_read: udev %d\n", block_dev->devnum);
- udev = usb_dev_desc[block_dev->devnum].priv;
- if (!udev) {
- debug("%s: No device\n", __func__);
- return 0;
- }
+static unsigned long usb_stor_write(struct blk_desc *dev, lbaint_t blknr,
+ lbaint_t blkcnt, const void *buffer)
#endif
- ss = (struct us_data *)udev->privptr;
-
- usb_disable_asynch(1); /* asynch transfer not allowed */
-
- srb->lun = block_dev->lun;
- buf_addr = (uintptr_t)buffer;
- start = blknr;
- blks = blkcnt;
-
- debug("\nusb_write: dev %d startblk " LBAF ", blccnt " LBAF " buffer %"
- PRIxPTR "\n", block_dev->devnum, start, blks, buf_addr);
-
- do {
- /* If write fails retry for max retry count else
- * return with number of blocks written successfully.
- */
- retry = 2;
- srb->pdata = (unsigned char *)buf_addr;
- if (blks > USB_MAX_XFER_BLK)
- smallblks = USB_MAX_XFER_BLK;
- else
- smallblks = (unsigned short) blks;
-retry_it:
- if (smallblks == USB_MAX_XFER_BLK)
- usb_show_progress();
- srb->datalen = block_dev->blksz * smallblks;
- srb->pdata = (unsigned char *)buf_addr;
- if (usb_write_10(srb, ss, start, smallblks)) {
- debug("Write ERROR\n");
- usb_request_sense(srb, ss);
- if (retry--)
- goto retry_it;
- blkcnt -= blks;
- break;
- }
- start += smallblks;
- blks -= smallblks;
- buf_addr += srb->datalen;
- } while (blks != 0);
- ss->flags &= ~USB_READY;
-
- debug("usb_write: end startblk " LBAF ", blccnt %x buffer %"
- PRIxPTR "\n", start, smallblks, buf_addr);
-
- usb_disable_asynch(0); /* asynch transfer allowed */
- if (blkcnt >= USB_MAX_XFER_BLK)
- debug("\n");
- return blkcnt;
-
+{
+ return usb_stor_read_write(dev, blknr, blkcnt, buffer, true);
}
/* Probe to see if a new device is actually a Storage device */
--
1.7.7.4
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