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Commit 29fab0cd authored by Yoshihiro Shimoda's avatar Yoshihiro Shimoda Committed by Greg Kroah-Hartman
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USB: r8a66597-hcd: fix usb device connection timing 



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

Signed-off-by: default avatarYoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 6d879107

drivers/usb/host/r8a66597-hcd.c

+32 −24
Original line number Diff line number Diff line
@@ -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);

		}

	}

}

drivers/usb/host/r8a66597.h

+2 −1
Original line number Diff line number Diff line
@@ -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))