* [U-Boot-Users] Setting processor endianess for USB modules
2008-04-30 8:34 ` Markus Klotzbücher
@ 2008-05-21 18:58 ` Christian Eggers
2008-05-21 19:23 ` Wolfgang Denk
0 siblings, 1 reply; 4+ messages in thread
From: Christian Eggers @ 2008-05-21 18:58 UTC (permalink / raw)
To: u-boot
Dear Markus,
I've made I new patch with git as requested.
regards
Christian
> Dear Christian,
>
> "Christian Eggers" <ceggers@gmx.de> writes:
>
> > I've recognized that a lot of USB code in U-Boot uses the macros
> > swap_16() and swap_32() which are defined in usb.h. The behaviour
> > of the macros is controlled by the define LITTLEENDIAN.
> >
> > Is there a good reason NOT to use the macros provided in
> > asm/byteorder.h (as in the appropriate code in Linux-2.4 )?
>
> Largely not. But be carefull. Besides big and little endian CPUs we also
> have controllers that operate in big or little endian (see
> CFG_OHCI_BE_CONTROLLER), and then there are PCI controllers whose
> registers need to be accessed as little endian
> (CFG_OHCI_SWAP_REG_ACCESS).
>
> But your right, there is no real for LITTLEENDIAN.
>
> > I think that switching to these functions might be useful in order
> > to eliminate the need to use the LITTLEENDIAN define for
> > specifying the byteorder. It seems that LITTLEENDIAN is not
> > used outside the USB code.
>
> Right. Patches cleaning this up are more than welcome! Please note that
> cleaning up USB drivers under the cpu/ directory is a waste of time
> though. Boards using these drivers should be converted to use the
> generic infrastructure in drivers/usb/ instead.
>
> Best regards
>
> Markus Klotzbuecher
---
common/usb.c | 44 ++++++++++++++++++++++----------------------
common/usb_kbd.c | 11 ++++++-----
common/usb_storage.c | 28 ++++++++++------------------
3 files changed, 38 insertions(+), 45 deletions(-)
diff --git a/common/usb.c b/common/usb.c
index 2fa5254..7033c2a 100644
--- a/common/usb.c
+++ b/common/usb.c
@@ -48,6 +48,7 @@
#include <command.h>
#include <asm/processor.h>
#include <linux/ctype.h>
+#include <asm/byteorder.h>
#if defined(CONFIG_CMD_USB)
@@ -177,10 +178,10 @@ int usb_control_msg(struct usb_device *d
/* set setup command */
setup_packet.requesttype = requesttype;
setup_packet.request = request;
- setup_packet.value = swap_16(value);
- setup_packet.index = swap_16(index);
- setup_packet.length = swap_16(size);
- USB_PRINTF("usb_control_msg: request: 0x%X, requesttype: 0x%X\nvalue
0x%X index 0x%X length 0x%X\n",
+ setup_packet.value = cpu_to_le16(value);
+ setup_packet.index = cpu_to_le16(index);
+ setup_packet.length = cpu_to_le16(size);
+ USB_PRINTF("usb_control_msg: request: 0x%X, requesttype: 0x%X, value
0x%X index 0x%X length 0x%X\n",
request,requesttype,value,index,size);
dev->status=USB_ST_NOT_PROC; /*not yet processed */
@@ -300,7 +301,7 @@ int usb_parse_config(struct usb_device *
return -1;
}
memcpy(&dev->config, buffer, buffer[0]);
- dev->config.wTotalLength = swap_16(dev->config.wTotalLength);
+ le16_to_cpus(&(dev->config.wTotalLength));
dev->config.no_of_if = 0;
index = dev->config.bLength;
@@ -329,8 +330,7 @@ int usb_parse_config(struct usb_device *
dev->config.if_desc[ifno].no_of_ep++; /* found an
endpoint */
memcpy(&dev->config.if_desc[ifno].ep_desc[epno],
&buffer[index], buffer[index]);
- dev-
>config.if_desc[ifno].ep_desc[epno].wMaxPacketSize =
- swap_16(dev-
>config.if_desc[ifno].ep_desc[epno].wMaxPacketSize);
+ le16_to_cpus(&(dev-
>config.if_desc[ifno].ep_desc[epno].wMaxPacketSize));
USB_PRINTF("if %d, ep %d\n", ifno, epno);
break;
default:
@@ -413,7 +413,7 @@ int usb_get_configuration_no(struct usb_
printf("config descriptor too short (expected %i, got
%i)\n",8,result);
return -1;
}
- tmp=swap_16(config->wTotalLength);
+ tmp = le16_to_cpu(config->wTotalLength);
if (tmp > USB_BUFSIZ) {
USB_PRINTF("usb_get_configuration_no: failed to get descriptor - too
long: %d\n",
@@ -816,10 +816,10 @@ int usb_new_device(struct usb_device *de
return 1;
}
/* correct le values */
- dev->descriptor.bcdUSB=swap_16(dev->descriptor.bcdUSB);
- dev->descriptor.idVendor=swap_16(dev->descriptor.idVendor);
- dev->descriptor.idProduct=swap_16(dev->descriptor.idProduct);
- dev->descriptor.bcdDevice=swap_16(dev->descriptor.bcdDevice);
+ le16_to_cpus(&dev->descriptor.bcdUSB);
+ le16_to_cpus(&dev->descriptor.idVendor);
+ le16_to_cpus(&dev->descriptor.idProduct);
+ le16_to_cpus(&dev->descriptor.bcdDevice);
/* only support for one config for now */
usb_get_configuration_no(dev,&tmpbuf[0],0);
usb_parse_config(dev,&tmpbuf[0],0);
@@ -979,8 +979,8 @@ static int hub_port_reset(struct usb_dev
USB_HUB_PRINTF("get_port_status failed status %lX\n",dev-
>status);
return -1;
}
- portstatus = swap_16(portsts.wPortStatus);
- portchange = swap_16(portsts.wPortChange);
+ portstatus = le16_to_cpu(portsts.wPortStatus);
+ portchange = le16_to_cpu(portsts.wPortChange);
USB_HUB_PRINTF("portstatus %x, change %x, %s\n", portstatus
,portchange,
portstatus&(1<<USB_PORT_FEAT_LOWSPEED) ? "Low
Speed" : "High Speed");
USB_HUB_PRINTF("STAT_C_CONNECTION = %d
STAT_CONNECTION = %d USB_PORT_STAT_ENABLE %d\n",
@@ -1024,8 +1024,8 @@ void usb_hub_port_connect_change(struct
return;
}
- portstatus = swap_16(portsts.wPortStatus);
- portchange = swap_16(portsts.wPortChange);
+ portstatus = le16_to_cpu(portsts.wPortStatus);
+ portchange = le16_to_cpu(portsts.wPortChange);
USB_HUB_PRINTF("portstatus %x, change %x, %s\n", portstatus, portchange,
portstatus&(1<<USB_PORT_FEAT_LOWSPEED) ? "Low Speed" : "High
Speed");
@@ -1099,7 +1099,7 @@ int usb_hub_configure(struct usb_device
}
memcpy((unsigned char *)&hub->desc,buffer,descriptor->bLength);
/* adjust 16bit values */
- hub->desc.wHubCharacteristics=swap_16(descriptor->wHubCharacteristics);
+ hub->desc.wHubCharacteristics = le16_to_cpu(descriptor->wHubCharacteristics);
/* set the bitmap */
bitmap=(unsigned char *)&hub->desc.DeviceRemovable[0];
memset(bitmap,0xff,(USB_MAXCHILDREN+1+7)/8); /* devices not removable by
default */
@@ -1161,11 +1161,11 @@ int usb_hub_configure(struct usb_device
}
hubsts = (struct usb_hub_status *)buffer;
USB_HUB_PRINTF("get_hub_status returned status %X, change %X\n",
- swap_16(hubsts->wHubStatus),swap_16(hubsts->wHubChange));
+ le16_to_cpu(hubsts->wHubStatus),le16_to_cpu(hubsts->wHubChange));
USB_HUB_PRINTF("local power source is %s\n",
- (swap_16(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ?
"lost (inactive)" : "good");
+ (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER)
? "lost (inactive)" : "good");
USB_HUB_PRINTF("%sover-current condition exists\n",
- (swap_16(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? ""
: "no ");
+ (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT)
? "" : "no ");
usb_hub_power_on(hub);
for (i = 0; i < dev->maxchild; i++) {
struct usb_port_status portsts;
@@ -1175,8 +1175,8 @@ int usb_hub_configure(struct usb_device
USB_HUB_PRINTF("get_port_status failed\n");
continue;
}
- portstatus = swap_16(portsts.wPortStatus);
- portchange = swap_16(portsts.wPortChange);
+ portstatus = le16_to_cpu(portsts.wPortStatus);
+ portchange = le16_to_cpu(portsts.wPortChange);
USB_HUB_PRINTF("Port %d Status %X Change
%X\n",i+1,portstatus,portchange);
if (portchange & USB_PORT_STAT_C_CONNECTION) {
USB_HUB_PRINTF("port %d connection change\n", i + 1);
diff --git a/common/usb_kbd.c b/common/usb_kbd.c
index 1703b23..f54c527 100644
--- a/common/usb_kbd.c
+++ b/common/usb_kbd.c
@@ -26,6 +26,7 @@
*/
#include <common.h>
#include <devices.h>
+#include <asm/byteorder.h>
#ifdef CONFIG_USB_KEYBOARD
@@ -475,14 +476,14 @@ static int fetch_item(unsigned char *sta
break;
case 2:
if ((end - start) >= 2) {
- item->data.u16 = swap_16((unsigned
short *)start);
+ item->data.u16 = le16_to_cpu((unsigned
short *)start);
start+=2;
return item->size;
}
case 3:
item->size++;
if ((end - start) >= 4) {
- item->data.u32 = swap_32((unsigned
long *)start);
+ item->data.u32 = le32_to_cpu((unsigned
long *)start);
start+=4;
return item->size;
}
@@ -705,15 +706,15 @@ static int usb_kbd_get_hid_desc(struct u
}
index=head->bLength;
config=(struct usb_config_descriptor *)&buffer[0];
- len=swap_16(config->wTotalLength);
+ len=le16_to_cpu(config->wTotalLength);
/* Ok the first entry must be a configuration entry, now process the others */
head=(struct usb_descriptor_header *)&buffer[index];
while(index+1 < len) {
if(head->bDescriptorType==USB_DT_HID) {
printf("HID desc found\n");
memcpy(&usb_kbd_hid_desc,&buffer[index],buffer[index]);
-
usb_kbd_hid_desc.bcdHID=swap_16(usb_kbd_hid_desc.bcdHID);
-
usb_kbd_hid_desc.wDescriptorLength=swap_16(usb_kbd_hid_desc.wDescriptorLength);
+ le16_to_cpus(&usb_kbd_hid_desc.bcdHID);
+ le16_to_cpus(&usb_kbd_hid_desc.wDescriptorLength);
usb_kbd_display_hid(&usb_kbd_hid_desc);
len=0;
break;
diff --git a/common/usb_storage.c b/common/usb_storage.c
index 7c08f95..2ca4721 100644
--- a/common/usb_storage.c
+++ b/common/usb_storage.c
@@ -52,6 +52,7 @@
#include <common.h>
#include <command.h>
+#include <asm/byteorder.h>
#include <asm/processor.h>
@@ -474,9 +475,9 @@ int usb_stor_BBB_comdat(ccb *srb, struct
/* always OUT to the ep */
pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
- cbw.dCBWSignature = swap_32(CBWSIGNATURE);
- cbw.dCBWTag = swap_32(CBWTag++);
- cbw.dCBWDataTransferLength = swap_32(srb->datalen);
+ cbw.dCBWSignature = cpu_to_le32(CBWSIGNATURE);
+ cbw.dCBWTag = cpu_to_le32(CBWTag++);
+ cbw.dCBWDataTransferLength = cpu_to_le32(srb->datalen);
cbw.bCBWFlags = (dir_in? CBWFLAGS_IN : CBWFLAGS_OUT);
cbw.bCBWLUN = srb->lun;
cbw.bCDBLength = srb->cmdlen;
@@ -692,14 +693,14 @@ int usb_stor_BBB_transport(ccb *srb, str
printf("\n");
#endif
/* misuse pipe to get the residue */
- pipe = swap_32(csw.dCSWDataResidue);
+ pipe = le32_to_cpu(csw.dCSWDataResidue);
if (pipe == 0 && srb->datalen != 0 && srb->datalen - data_actlen != 0)
pipe = srb->datalen - data_actlen;
- if (CSWSIGNATURE != swap_32(csw.dCSWSignature)) {
+ if (CSWSIGNATURE != le32_to_cpu(csw.dCSWSignature)) {
USB_STOR_PRINTF("!CSWSIGNATURE\n");
usb_stor_BBB_reset(us);
return USB_STOR_TRANSPORT_FAILED;
- } else if ((CBWTag - 1) != swap_32(csw.dCSWTag)) {
+ } else if ((CBWTag - 1) != le32_to_cpu(csw.dCSWTag)) {
USB_STOR_PRINTF("!Tag\n");
usb_stor_BBB_reset(us);
return USB_STOR_TRANSPORT_FAILED;
@@ -1222,18 +1223,9 @@ int usb_stor_get_info(struct usb_device
if(cap[0]>(0x200000 * 10)) /* greater than 10 GByte */
cap[0]>>=16;
#endif
-#ifdef LITTLEENDIAN
- cap[0] = ((unsigned long)(
- (((unsigned long)(cap[0]) & (unsigned long)0x000000ffUL) << 24) |
- (((unsigned long)(cap[0]) & (unsigned long)0x0000ff00UL) << 8) |
- (((unsigned long)(cap[0]) & (unsigned long)0x00ff0000UL) >> 8) |
- (((unsigned long)(cap[0]) & (unsigned long)0xff000000UL) >> 24) ));
- cap[1] = ((unsigned long)(
- (((unsigned long)(cap[1]) & (unsigned long)0x000000ffUL) << 24) |
- (((unsigned long)(cap[1]) & (unsigned long)0x0000ff00UL) << 8) |
- (((unsigned long)(cap[1]) & (unsigned long)0x00ff0000UL) >> 8) |
- (((unsigned long)(cap[1]) & (unsigned long)0xff000000UL) >> 24) ));
-#endif
+ cap[0] = cpu_to_be32(cap[0]);
+ cap[1] = cpu_to_be32(cap[1]);
+
/* this assumes bigendian! */
cap[0] += 1;
capacity = &cap[0];
--
1.4.3.4
^ permalink raw reply related [flat|nested] 4+ messages in thread