korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-11 12:28:41 +08:00
Code Issues Packages Projects Releases Wiki Activity

USB: r8a66597-hcd: fix usb device connection timing

Browse Source 
Fix the problem that enumeration of a USB device was slow.

Signed-off-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Yoshihiro Shimoda 2008-04-10 21:05:55 +09:00 committed by Greg Kroah-Hartman
parent 6d8791076c
commit 29fab0cd89
2 changed files with 34 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

56
drivers/usb/host/r8a66597-hcd.c
View File

@ -900,10 +900,19 @@ static void pipe_irq_disable(struct r8a66597 *r8a66597, u16 pipenum)
}
/* this function must be called with interrupt disabled */
static void r8a66597_usb_preconnect(struct r8a66597 *r8a66597, int port)
static void r8a66597_check_syssts(struct r8a66597 *r8a66597, int port,
u16 syssts)
{
r8a66597->root_hub[port].port |= (1 << USB_PORT_FEAT_CONNECTION)
| (1 << USB_PORT_FEAT_C_CONNECTION);
if (syssts == SE0) {
r8a66597_bset(r8a66597, ATTCHE, get_intenb_reg(port));
return;
}
if (syssts == FS_JSTS)
r8a66597_bset(r8a66597, HSE, get_syscfg_reg(port));
else if (syssts == LS_JSTS)
r8a66597_bclr(r8a66597, HSE, get_syscfg_reg(port));
r8a66597_write(r8a66597, ~DTCH, get_intsts_reg(port));
r8a66597_bset(r8a66597, DTCHE, get_intenb_reg(port));
}
@ -1478,13 +1487,21 @@ static void irq_pipe_nrdy(struct r8a66597 *r8a66597)
}
}
static void r8a66597_root_hub_start_polling(struct r8a66597 *r8a66597)
{
mod_timer(&r8a66597->rh_timer,
jiffies + msecs_to_jiffies(R8A66597_RH_POLL_TIME));
}
static void start_root_hub_sampling(struct r8a66597 *r8a66597, int port)
{
struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
rh->old_syssts = r8a66597_read(r8a66597, get_syssts_reg(port)) & LNST;
rh->scount = R8A66597_MAX_SAMPLING;
mod_timer(&r8a66597->rh_timer, jiffies + msecs_to_jiffies(50));
r8a66597->root_hub[port].port |= (1 << USB_PORT_FEAT_CONNECTION)
| (1 << USB_PORT_FEAT_C_CONNECTION);
r8a66597_root_hub_start_polling(r8a66597);
}
static irqreturn_t r8a66597_irq(struct usb_hcd *hcd)
@ -1571,37 +1588,28 @@ static void r8a66597_root_hub_control(struct r8a66597 *r8a66597, int port)
if ((tmp & USBRST) == USBRST) {
r8a66597_mdfy(r8a66597, UACT, USBRST | UACT,
dvstctr_reg);
mod_timer(&r8a66597->rh_timer,
jiffies + msecs_to_jiffies(50));
r8a66597_root_hub_start_polling(r8a66597);
} else
r8a66597_usb_connect(r8a66597, port);
}
if (!(rh->port & (1 << USB_PORT_FEAT_CONNECTION))) {
r8a66597_write(r8a66597, ~ATTCH, get_intsts_reg(port));
r8a66597_bset(r8a66597, ATTCHE, get_intenb_reg(port));
}
if (rh->scount > 0) {
tmp = r8a66597_read(r8a66597, get_syssts_reg(port)) & LNST;
if (tmp == rh->old_syssts) {
rh->scount--;
if (rh->scount == 0) {
if (tmp == FS_JSTS) {
r8a66597_bset(r8a66597, HSE,
get_syscfg_reg(port));
r8a66597_usb_preconnect(r8a66597, port);
} else if (tmp == LS_JSTS) {
r8a66597_bclr(r8a66597, HSE,
get_syscfg_reg(port));
r8a66597_usb_preconnect(r8a66597, port);
} else if (tmp == SE0)
r8a66597_bset(r8a66597, ATTCHE,
get_intenb_reg(port));
} else {
mod_timer(&r8a66597->rh_timer,
jiffies + msecs_to_jiffies(50));
}
if (rh->scount == 0)
r8a66597_check_syssts(r8a66597, port, tmp);
else
r8a66597_root_hub_start_polling(r8a66597);
} else {
rh->scount = R8A66597_MAX_SAMPLING;
rh->old_syssts = tmp;
mod_timer(&r8a66597->rh_timer,
jiffies + msecs_to_jiffies(50));
r8a66597_root_hub_start_polling(r8a66597);
}
}
}

3
drivers/usb/host/r8a66597.h
View File

@ -396,7 +396,8 @@
#define R8A66597_BUF_BSIZE 8
#define R8A66597_MAX_DEVICE 10
#define R8A66597_MAX_ROOT_HUB 2
#define R8A66597_MAX_SAMPLING 10
#define R8A66597_MAX_SAMPLING 5
#define R8A66597_RH_POLL_TIME 10
#define R8A66597_MAX_DMA_CHANNEL 2
#define R8A66597_PIPE_NO_DMA R8A66597_MAX_DMA_CHANNEL
#define check_bulk_or_isoc(pipenum) ((pipenum >= 1 && pipenum <= 5))