Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-11-16 09:48:16 +00:00
Code Issues Projects Releases Packages Wiki Activity
u-boot/drivers/usb/host/sl811-hcd.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

713 lines
18 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2004
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* This code is based on linux driver for sl811hs chip, source at
* drivers/usb/host/sl811.c:
*
* SL811 Host Controller Interface driver for USB.
*
* Copyright (c) 2003/06, Courage Co., Ltd.
*
* Based on:
* 1.uhci.c by Linus Torvalds, Johannes Erdfelt, Randy Dunlap,
* Georg Acher, Deti Fliegl, Thomas Sailer, Roman Weissgaerber,
* Adam Richter, Gregory P. Smith;
* 2.Original SL811 driver (hc_sl811.o) by Pei Liu <pbl@cypress.com>
* 3.Rewrited as sl811.o by Yin Aihua <yinah:couragetech.com.cn>
*/
#include <common.h>
#include <mpc8xx.h>
#include <usb.h>
#include "sl811.h"
#include "../../../board/kup/common/kup.h"
#ifdef __PPC__
# define EIEIO __asm__ volatile ("eieio")
#else
# define EIEIO /* nothing */
#endif
#define SL811_ADR (0x50000000)
#define SL811_DAT (0x50000001)
#ifdef SL811_DEBUG
static int debug = 9;
#endif
static int root_hub_devnum = 0;
static struct usb_port_status rh_status = { 0 };/* root hub port status */
static int sl811_rh_submit_urb(struct usb_device *usb_dev, unsigned long pipe,
void *data, int buf_len, struct devrequest *cmd);
static void sl811_write (__u8 index, __u8 data)
{
*(volatile unsigned char *) (SL811_ADR) = index;
EIEIO;
*(volatile unsigned char *) (SL811_DAT) = data;
EIEIO;
}
static __u8 sl811_read (__u8 index)
{
__u8 data;
*(volatile unsigned char *) (SL811_ADR) = index;
EIEIO;
data = *(volatile unsigned char *) (SL811_DAT);
EIEIO;
return (data);
}
/*
* Read consecutive bytes of data from the SL811H/SL11H buffer
*/
static void inline sl811_read_buf(__u8 offset, __u8 *buf, __u8 size)
{
*(volatile unsigned char *) (SL811_ADR) = offset;
EIEIO;
while (size--) {
*buf++ = *(volatile unsigned char *) (SL811_DAT);
EIEIO;
}
}
/*
* Write consecutive bytes of data to the SL811H/SL11H buffer
*/
static void inline sl811_write_buf(__u8 offset, __u8 *buf, __u8 size)
{
*(volatile unsigned char *) (SL811_ADR) = offset;
EIEIO;
while (size--) {
*(volatile unsigned char *) (SL811_DAT) = *buf++;
EIEIO;
}
}
int usb_init_kup4x (void)
{
volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
volatile memctl8xx_t *memctl = &immap->im_memctl;
int i;
unsigned char tmp;
memctl = &immap->im_memctl;
memctl->memc_or7 = 0xFFFF8726;
memctl->memc_br7 = 0x50000401; /* start at 0x50000000 */
/* BP 14 low = USB ON */
immap->im_cpm.cp_pbdat &= ~(BP_USB_VCC);
/* PB 14 nomal port */
immap->im_cpm.cp_pbpar &= ~(BP_USB_VCC);
/* output */
immap->im_cpm.cp_pbdir |= (BP_USB_VCC);
puts ("USB: ");
for (i = 0x10; i < 0xff; i++) {
sl811_write(i, i);
tmp = (sl811_read(i));
if (tmp != i) {
printf ("SL811 compare error index=0x%02x read=0x%02x\n", i, tmp);
return (-1);
}
}
printf ("SL811 ready\n");
return (0);
}
/*
* This function resets SL811HS controller and detects the speed of
* the connecting device
*
* Return: 0 = no device attached; 1 = USB device attached
*/
static int sl811_hc_reset(void)
{
int status ;
sl811_write(SL811_CTRL2, SL811_CTL2_HOST | SL811_12M_HI);
sl811_write(SL811_CTRL1, SL811_CTRL1_RESET);
mdelay(20);
/* Disable hardware SOF generation, clear all irq status. */
sl811_write(SL811_CTRL1, 0);
mdelay(2);
sl811_write(SL811_INTRSTS, 0xff);
status = sl811_read(SL811_INTRSTS);
if (status & SL811_INTR_NOTPRESENT) {
/* Device is not present */
PDEBUG(0, "Device not present\n");
rh_status.wPortStatus &= ~(USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE);
rh_status.wPortChange |= USB_PORT_STAT_C_CONNECTION;
sl811_write(SL811_INTR, SL811_INTR_INSRMV);
return 0;
}
/* Send SOF to address 0, endpoint 0. */
sl811_write(SL811_LEN_B, 0);
sl811_write(SL811_PIDEP_B, PIDEP(USB_PID_SOF, 0));
sl811_write(SL811_DEV_B, 0x00);
sl811_write(SL811_SOFLOW, SL811_12M_LOW);
if (status & SL811_INTR_SPEED_FULL) {
/* full speed device connect directly to root hub */
PDEBUG (0, "Full speed Device attached\n");
sl811_write(SL811_CTRL1, SL811_CTRL1_RESET);
mdelay(20);
sl811_write(SL811_CTRL2, SL811_CTL2_HOST | SL811_12M_HI);
sl811_write(SL811_CTRL1, SL811_CTRL1_SOF);
/* start the SOF or EOP */
sl811_write(SL811_CTRL_B, SL811_USB_CTRL_ARM);
rh_status.wPortStatus |= USB_PORT_STAT_CONNECTION;
rh_status.wPortStatus &= ~USB_PORT_STAT_LOW_SPEED;
mdelay(2);
sl811_write(SL811_INTRSTS, 0xff);
} else {
/* slow speed device connect directly to root-hub */
PDEBUG(0, "Low speed Device attached\n");
sl811_write(SL811_CTRL1, SL811_CTRL1_RESET);
mdelay(20);
sl811_write(SL811_CTRL2, SL811_CTL2_HOST | SL811_CTL2_DSWAP | SL811_12M_HI);
sl811_write(SL811_CTRL1, SL811_CTRL1_SPEED_LOW | SL811_CTRL1_SOF);
/* start the SOF or EOP */
sl811_write(SL811_CTRL_B, SL811_USB_CTRL_ARM);
rh_status.wPortStatus |= USB_PORT_STAT_CONNECTION | USB_PORT_STAT_LOW_SPEED;
mdelay(2);
sl811_write(SL811_INTRSTS, 0xff);
}
rh_status.wPortChange |= USB_PORT_STAT_C_CONNECTION;
sl811_write(SL811_INTR, /*SL811_INTR_INSRMV*/SL811_INTR_DONE_A);
return 1;
}
int usb_lowlevel_init(int index, enum usb_init_type init, void **controller)
{
root_hub_devnum = 0;
sl811_hc_reset();
return 0;
}
int usb_lowlevel_stop(int index)
{
sl811_hc_reset();
return 0;
}
static int calc_needed_buswidth(int bytes, int need_preamble)
{
return !need_preamble ? bytes * 8 + 256 : 8 * 8 * bytes + 2048;
}
static int sl811_send_packet(struct usb_device *dev, unsigned long pipe, __u8 *buffer, int len)
{
__u8 ctrl = SL811_USB_CTRL_ARM | SL811_USB_CTRL_ENABLE;
__u16 status = 0;
int err = 0, time_start = get_timer(0);
int need_preamble = !(rh_status.wPortStatus & USB_PORT_STAT_LOW_SPEED) &&
(dev->speed == USB_SPEED_LOW);
if (len > 239)
return -1;
if (usb_pipeout(pipe))
ctrl |= SL811_USB_CTRL_DIR_OUT;
if (usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe)))
ctrl |= SL811_USB_CTRL_TOGGLE_1;
if (need_preamble)
ctrl |= SL811_USB_CTRL_PREAMBLE;
sl811_write(SL811_INTRSTS, 0xff);
while (err < 3) {
sl811_write(SL811_ADDR_A, 0x10);
sl811_write(SL811_LEN_A, len);
if (usb_pipeout(pipe) && len)
sl811_write_buf(0x10, buffer, len);
if (!(rh_status.wPortStatus & USB_PORT_STAT_LOW_SPEED) &&
sl811_read(SL811_SOFCNTDIV)*64 < calc_needed_buswidth(len, need_preamble))
ctrl |= SL811_USB_CTRL_SOF;
else
ctrl &= ~SL811_USB_CTRL_SOF;
sl811_write(SL811_CTRL_A, ctrl);
while (!(sl811_read(SL811_INTRSTS) & SL811_INTR_DONE_A)) {
if (5*CONFIG_SYS_HZ < get_timer(time_start)) {
printf("USB transmit timed out\n");
return -USB_ST_CRC_ERR;
}
}
sl811_write(SL811_INTRSTS, 0xff);
status = sl811_read(SL811_STS_A);
if (status & SL811_USB_STS_ACK) {
int remainder = sl811_read(SL811_CNT_A);
if (remainder) {
PDEBUG(0, "usb transfer remainder = %d\n", remainder);
len -= remainder;
}
if (usb_pipein(pipe) && len)
sl811_read_buf(0x10, buffer, len);
return len;
}
if ((status & SL811_USB_STS_NAK) == SL811_USB_STS_NAK)
continue;
PDEBUG(0, "usb transfer error %#x\n", (int)status);
err++;
}
err = 0;
if (status & SL811_USB_STS_ERROR)
err |= USB_ST_BUF_ERR;
if (status & SL811_USB_STS_TIMEOUT)
err |= USB_ST_CRC_ERR;
if (status & SL811_USB_STS_STALL)
err |= USB_ST_STALLED;
return -err;
}
int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
int len)
{
int dir_out = usb_pipeout(pipe);
int ep = usb_pipeendpoint(pipe);
int max = usb_maxpacket(dev, pipe);
int done = 0;
PDEBUG(7, "dev = %ld pipe = %ld buf = %p size = %d dir_out = %d\n",
usb_pipedevice(pipe), usb_pipeendpoint(pipe), buffer, len, dir_out);
dev->status = 0;
sl811_write(SL811_DEV_A, usb_pipedevice(pipe));
sl811_write(SL811_PIDEP_A, PIDEP(!dir_out ? USB_PID_IN : USB_PID_OUT, ep));
while (done < len) {
int res = sl811_send_packet(dev, pipe, (__u8*)buffer+done,
max > len - done ? len - done : max);
if (res < 0) {
dev->status = -res;
return res;
}
if (!dir_out && res < max) /* short packet */
break;
done += res;
usb_dotoggle(dev, ep, dir_out);
}
dev->act_len = done;
return 0;
}
int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
int len,struct devrequest *setup)
{
int done = 0;
int devnum = usb_pipedevice(pipe);
int ep = usb_pipeendpoint(pipe);
dev->status = 0;
if (devnum == root_hub_devnum)
return sl811_rh_submit_urb(dev, pipe, buffer, len, setup);
PDEBUG(7, "dev = %d pipe = %ld buf = %p size = %d rt = %#x req = %#x bus = %i\n",
devnum, ep, buffer, len, (int)setup->requesttype,
(int)setup->request, sl811_read(SL811_SOFCNTDIV)*64);
sl811_write(SL811_DEV_A, devnum);
sl811_write(SL811_PIDEP_A, PIDEP(USB_PID_SETUP, ep));
/* setup phase */
usb_settoggle(dev, ep, 1, 0);
if (sl811_send_packet(dev, usb_sndctrlpipe(dev, ep),
(__u8*)setup, sizeof(*setup)) == sizeof(*setup)) {
int dir_in = usb_pipein(pipe);
int max = usb_maxpacket(dev, pipe);
/* data phase */
sl811_write(SL811_PIDEP_A,
PIDEP(dir_in ? USB_PID_IN : USB_PID_OUT, ep));
usb_settoggle(dev, ep, usb_pipeout(pipe), 1);
while (done < len) {
int res = sl811_send_packet(dev, pipe, (__u8*)buffer+done,
max > len - done ? len - done : max);
if (res < 0) {
PDEBUG(0, "status data failed!\n");
dev->status = -res;
return 0;
}
done += res;
usb_dotoggle(dev, ep, usb_pipeout(pipe));
if (dir_in && res < max) /* short packet */
break;
}
/* status phase */
sl811_write(SL811_PIDEP_A,
PIDEP(!dir_in ? USB_PID_IN : USB_PID_OUT, ep));
usb_settoggle(dev, ep, !usb_pipeout(pipe), 1);
if (sl811_send_packet(dev,
!dir_in ? usb_rcvctrlpipe(dev, ep) :
usb_sndctrlpipe(dev, ep),
0, 0) < 0) {
PDEBUG(0, "status phase failed!\n");
dev->status = -1;
}
} else {
PDEBUG(0, "setup phase failed!\n");
dev->status = -1;
}
dev->act_len = done;
return done;
}
int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
int len, int interval)
{
PDEBUG(0, "dev = %p pipe = %#lx buf = %p size = %d int = %d\n", dev, pipe,
buffer, len, interval);
return -1;
}
/*
* SL811 Virtual Root Hub
*/
/* Device descriptor */
static __u8 sl811_rh_dev_des[] =
{
0x12, /* __u8 bLength; */
0x01, /* __u8 bDescriptorType; Device */
0x10, /* __u16 bcdUSB; v1.1 */
0x01,
0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */
0x00, /* __u8 bDeviceSubClass; */
0x00, /* __u8 bDeviceProtocol; */
0x08, /* __u8 bMaxPacketSize0; 8 Bytes */
0x00, /* __u16 idVendor; */
0x00,
0x00, /* __u16 idProduct; */
0x00,
0x00, /* __u16 bcdDevice; */
0x00,
0x00, /* __u8 iManufacturer; */
0x02, /* __u8 iProduct; */
0x01, /* __u8 iSerialNumber; */
0x01 /* __u8 bNumConfigurations; */
};
/* Configuration descriptor */
static __u8 sl811_rh_config_des[] =
{
0x09, /* __u8 bLength; */
0x02, /* __u8 bDescriptorType; Configuration */
0x19, /* __u16 wTotalLength; */
0x00,
0x01, /* __u8 bNumInterfaces; */
0x01, /* __u8 bConfigurationValue; */
0x00, /* __u8 iConfiguration; */
0x40, /* __u8 bmAttributes;
Bit 7: Bus-powered, 6: Self-powered, 5 Remote-wakwup,
4..0: resvd */
0x00, /* __u8 MaxPower; */
/* interface */
0x09, /* __u8 if_bLength; */
0x04, /* __u8 if_bDescriptorType; Interface */
0x00, /* __u8 if_bInterfaceNumber; */
0x00, /* __u8 if_bAlternateSetting; */
0x01, /* __u8 if_bNumEndpoints; */
0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */
0x00, /* __u8 if_bInterfaceSubClass; */
0x00, /* __u8 if_bInterfaceProtocol; */
0x00, /* __u8 if_iInterface; */
/* endpoint */
0x07, /* __u8 ep_bLength; */
0x05, /* __u8 ep_bDescriptorType; Endpoint */
0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */
0x03, /* __u8 ep_bmAttributes; Interrupt */
0x08, /* __u16 ep_wMaxPacketSize; */
0x00,
0xff /* __u8 ep_bInterval; 255 ms */
};
/* root hub class descriptor*/
static __u8 sl811_rh_hub_des[] =
{
0x09, /* __u8 bLength; */
0x29, /* __u8 bDescriptorType; Hub-descriptor */
0x01, /* __u8 bNbrPorts; */
0x00, /* __u16 wHubCharacteristics; */
0x00,
0x50, /* __u8 bPwrOn2pwrGood; 2ms */
0x00, /* __u8 bHubContrCurrent; 0 mA */
0xfc, /* __u8 DeviceRemovable; *** 7 Ports max *** */
0xff /* __u8 PortPwrCtrlMask; *** 7 ports max *** */
};
/*
* helper routine for returning string descriptors in UTF-16LE
* input can actually be ISO-8859-1; ASCII is its 7-bit subset
*/
static int ascii2utf (char *s, u8 *utf, int utfmax)
{
int retval;
for (retval = 0; *s && utfmax > 1; utfmax -= 2, retval += 2) {
*utf++ = *s++;
*utf++ = 0;
}
return retval;
}
/*
* root_hub_string is used by each host controller's root hub code,
* so that they're identified consistently throughout the system.
*/
static int usb_root_hub_string (int id, int serial, char *type, __u8 *data, int len)
{
char buf [30];
/* assert (len > (2 * (sizeof (buf) + 1)));
assert (strlen (type) <= 8);*/
/* language ids */
if (id == 0) {
*data++ = 4; *data++ = 3; /* 4 bytes data */
*data++ = 0; *data++ = 0; /* some language id */
return 4;
/* serial number */
} else if (id == 1) {
sprintf (buf, "%#x", serial);
/* product description */
} else if (id == 2) {
sprintf (buf, "USB %s Root Hub", type);
/* id 3 == vendor description */
/* unsupported IDs --> "stall" */
} else
return 0;
ascii2utf (buf, data + 2, len - 2);
data [0] = 2 + strlen(buf) * 2;
data [1] = 3;
return data [0];
}
/* helper macro */
#define OK(x) len = (x); break
/*
* This function handles all USB request to the the virtual root hub
*/
static int sl811_rh_submit_urb(struct usb_device *usb_dev, unsigned long pipe,
void *data, int buf_len, struct devrequest *cmd)
{
__u8 data_buf[16];
__u8 *bufp = data_buf;
int len = 0;
int status = 0;
__u16 bmRType_bReq;
__u16 wValue = le16_to_cpu (cmd->value);
__u16 wLength = le16_to_cpu (cmd->length);
#ifdef SL811_DEBUG
__u16 wIndex = le16_to_cpu (cmd->index);
#endif
if (usb_pipeint(pipe)) {
PDEBUG(0, "interrupt transfer unimplemented!\n");
return 0;
}
bmRType_bReq = cmd->requesttype | (cmd->request << 8);
PDEBUG(5, "submit rh urb, req = %d(%x) val = %#x index = %#x len=%d\n",
bmRType_bReq, bmRType_bReq, wValue, wIndex, wLength);
/* Request Destination:
without flags: Device,
USB_RECIP_INTERFACE: interface,
USB_RECIP_ENDPOINT: endpoint,
USB_TYPE_CLASS means HUB here,
USB_RECIP_OTHER | USB_TYPE_CLASS almost ever means HUB_PORT here
*/
switch (bmRType_bReq) {
case RH_GET_STATUS:
*(__u16 *)bufp = cpu_to_le16(1);
OK(2);
case RH_GET_STATUS | USB_RECIP_INTERFACE:
*(__u16 *)bufp = cpu_to_le16(0);
OK(2);
case RH_GET_STATUS | USB_RECIP_ENDPOINT:
*(__u16 *)bufp = cpu_to_le16(0);
OK(2);
case RH_GET_STATUS | USB_TYPE_CLASS:
*(__u32 *)bufp = cpu_to_le32(0);
OK(4);
case RH_GET_STATUS | USB_RECIP_OTHER | USB_TYPE_CLASS:
*(__u32 *)bufp = cpu_to_le32(rh_status.wPortChange<<16 | rh_status.wPortStatus);
OK(4);
case RH_CLEAR_FEATURE | USB_RECIP_ENDPOINT:
switch (wValue) {
case 1:
OK(0);
}
break;
case RH_CLEAR_FEATURE | USB_TYPE_CLASS:
switch (wValue) {
case C_HUB_LOCAL_POWER:
OK(0);
case C_HUB_OVER_CURRENT:
OK(0);
}
break;
case RH_CLEAR_FEATURE | USB_RECIP_OTHER | USB_TYPE_CLASS:
switch (wValue) {
case USB_PORT_FEAT_ENABLE:
rh_status.wPortStatus &= ~USB_PORT_STAT_ENABLE;
OK(0);
case USB_PORT_FEAT_SUSPEND:
rh_status.wPortStatus &= ~USB_PORT_STAT_SUSPEND;
OK(0);
case USB_PORT_FEAT_POWER:
rh_status.wPortStatus &= ~USB_PORT_STAT_POWER;
OK(0);
case USB_PORT_FEAT_C_CONNECTION:
rh_status.wPortChange &= ~USB_PORT_STAT_C_CONNECTION;
OK(0);
case USB_PORT_FEAT_C_ENABLE:
rh_status.wPortChange &= ~USB_PORT_STAT_C_ENABLE;
OK(0);
case USB_PORT_FEAT_C_SUSPEND:
rh_status.wPortChange &= ~USB_PORT_STAT_C_SUSPEND;
OK(0);
case USB_PORT_FEAT_C_OVER_CURRENT:
rh_status.wPortChange &= ~USB_PORT_STAT_C_OVERCURRENT;
OK(0);
case USB_PORT_FEAT_C_RESET:
rh_status.wPortChange &= ~USB_PORT_STAT_C_RESET;
OK(0);
}
break;
case RH_SET_FEATURE | USB_RECIP_OTHER | USB_TYPE_CLASS:
switch (wValue) {
case USB_PORT_FEAT_SUSPEND:
rh_status.wPortStatus |= USB_PORT_STAT_SUSPEND;
OK(0);
case USB_PORT_FEAT_RESET:
rh_status.wPortStatus |= USB_PORT_STAT_RESET;
rh_status.wPortChange = 0;
rh_status.wPortChange |= USB_PORT_STAT_C_RESET;
rh_status.wPortStatus &= ~USB_PORT_STAT_RESET;
rh_status.wPortStatus |= USB_PORT_STAT_ENABLE;
OK(0);
case USB_PORT_FEAT_POWER:
rh_status.wPortStatus |= USB_PORT_STAT_POWER;
OK(0);
case USB_PORT_FEAT_ENABLE:
rh_status.wPortStatus |= USB_PORT_STAT_ENABLE;
OK(0);
}
break;
case RH_SET_ADDRESS:
root_hub_devnum = wValue;
OK(0);
case RH_GET_DESCRIPTOR:
switch ((wValue & 0xff00) >> 8) {
case USB_DT_DEVICE:
len = sizeof(sl811_rh_dev_des);
bufp = sl811_rh_dev_des;
OK(len);
case USB_DT_CONFIG:
len = sizeof(sl811_rh_config_des);
bufp = sl811_rh_config_des;
OK(len);
case USB_DT_STRING:
len = usb_root_hub_string(wValue & 0xff, (int)(long)0, "SL811HS", data, wLength);
if (len > 0) {
bufp = data;
OK(len);
}
default:
status = -32;
}
break;
case RH_GET_DESCRIPTOR | USB_TYPE_CLASS:
len = sizeof(sl811_rh_hub_des);
bufp = sl811_rh_hub_des;
OK(len);
case RH_GET_CONFIGURATION:
bufp[0] = 0x01;
OK(1);
case RH_SET_CONFIGURATION:
OK(0);
default:
PDEBUG(1, "unsupported root hub command\n");
status = -32;
}
len = min(len, buf_len);
if (data != bufp)
memcpy(data, bufp, len);
PDEBUG(5, "len = %d, status = %d\n", len, status);
usb_dev->status = status;
usb_dev->act_len = len;
return status == 0 ? len : status;
}
Reference in a new issue View git blame Copy permalink