From shimoda.yoshihiro@renesas.com Thu Apr 10 05:06:25 2008 From: Yoshihiro Shimoda Date: Thu, 10 Apr 2008 21:05:47 +0900 Subject: USB: r8a66597-hcd: fix interrupt transfer interval To: gregkh@suse.de Cc: linux-usb@vger.kernel.org Message-ID: <47FE029B.4040703@renesas.com> This driver ignored the value of bInterval and revised the problem that performed interrupt transfer. ASIX USB Ethernet adapter comes to work with this host controller by applying this patch. Signed-off-by: Yoshihiro Shimoda Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/r8a66597-hcd.c | 77 ++++++++++++++++++++++++++++++++++------ drivers/usb/host/r8a66597.h | 3 + 2 files changed, 70 insertions(+), 10 deletions(-) --- a/drivers/usb/host/r8a66597-hcd.c +++ b/drivers/usb/host/r8a66597-hcd.c @@ -46,7 +46,7 @@ MODULE_LICENSE("GPL"); MODULE_AUTHOR("Yoshihiro Shimoda"); MODULE_ALIAS("platform:r8a66597_hcd"); -#define DRIVER_VERSION "29 May 2007" +#define DRIVER_VERSION "10 Apr 2008" static const char hcd_name[] = "r8a66597_hcd"; @@ -577,13 +577,9 @@ static void pipe_buffer_setting(struct r PIPEBUF); r8a66597_write(r8a66597, make_devsel(info->address) | info->maxpacket, PIPEMAXP); - if (info->interval) - info->interval--; r8a66597_write(r8a66597, info->interval, PIPEPERI); } - - /* this function must be called with interrupt disabled */ static void pipe_setting(struct r8a66597 *r8a66597, struct r8a66597_td *td) { @@ -825,6 +821,25 @@ static void disable_r8a66597_pipe_all(st dev->dma_map = 0; } +static unsigned long get_timer_interval(struct urb *urb, __u8 interval) +{ + __u8 i; + unsigned long time = 1; + + if (usb_pipeisoc(urb->pipe)) + return 0; + + if (get_r8a66597_usb_speed(urb->dev->speed) == HSMODE) { + for (i = 0; i < (interval - 1); i++) + time *= 2; + time = time * 125 / 1000; /* uSOF -> msec */ + } else { + time = interval; + } + + return time; +} + /* this function must be called with interrupt disabled */ static void init_pipe_info(struct r8a66597 *r8a66597, struct urb *urb, struct usb_host_endpoint *hep, @@ -840,7 +855,16 @@ static void init_pipe_info(struct r8a665 & USB_ENDPOINT_XFERTYPE_MASK); info.bufnum = get_bufnum(info.pipenum); info.buf_bsize = get_buf_bsize(info.pipenum); - info.interval = ep->bInterval; + if (info.type == R8A66597_BULK) { + info.interval = 0; + info.timer_interval = 0; + } else { + if (ep->bInterval > IITV) + info.interval = IITV; + else + info.interval = ep->bInterval ? ep->bInterval - 1 : 0; + info.timer_interval = get_timer_interval(urb, ep->bInterval); + } if (ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK) info.dir_in = 1; else @@ -1582,6 +1606,29 @@ static void r8a66597_root_hub_control(st } } +static void r8a66597_interval_timer(unsigned long _r8a66597) +{ + struct r8a66597 *r8a66597 = (struct r8a66597 *)_r8a66597; + unsigned long flags; + u16 pipenum; + struct r8a66597_td *td; + + spin_lock_irqsave(&r8a66597->lock, flags); + + for (pipenum = 0; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) { + if (!(r8a66597->interval_map & (1 << pipenum))) + continue; + if (timer_pending(&r8a66597->interval_timer[pipenum])) + continue; + + td = r8a66597_get_td(r8a66597, pipenum); + if (td) + start_transfer(r8a66597, td); + } + + spin_unlock_irqrestore(&r8a66597->lock, flags); +} + static void r8a66597_td_timer(unsigned long _r8a66597) { struct r8a66597 *r8a66597 = (struct r8a66597 *)_r8a66597; @@ -1763,10 +1810,17 @@ static int r8a66597_urb_enqueue(struct u urb->hcpriv = td; if (request) { - ret = start_transfer(r8a66597, td); - if (ret < 0) { - list_del(&td->queue); - kfree(td); + if (td->pipe->info.timer_interval) { + r8a66597->interval_map |= 1 << td->pipenum; + mod_timer(&r8a66597->interval_timer[td->pipenum], + jiffies + msecs_to_jiffies( + td->pipe->info.timer_interval)); + } else { + ret = start_transfer(r8a66597, td); + if (ret < 0) { + list_del(&td->queue); + kfree(td); + } } } else set_td_timer(r8a66597, td); @@ -2192,6 +2246,9 @@ static int __init r8a66597_probe(struct init_timer(&r8a66597->td_timer[i]); r8a66597->td_timer[i].function = r8a66597_td_timer; r8a66597->td_timer[i].data = (unsigned long)r8a66597; + setup_timer(&r8a66597->interval_timer[i], + r8a66597_interval_timer, + (unsigned long)r8a66597); } INIT_LIST_HEAD(&r8a66597->child_device); --- a/drivers/usb/host/r8a66597.h +++ b/drivers/usb/host/r8a66597.h @@ -404,6 +404,7 @@ #define make_devsel(addr) (addr << 12) struct r8a66597_pipe_info { + unsigned long timer_interval; u16 pipenum; u16 address; /* R8A66597 HCD usb address */ u16 epnum; @@ -478,9 +479,11 @@ struct r8a66597 { struct timer_list rh_timer; struct timer_list td_timer[R8A66597_MAX_NUM_PIPE]; + struct timer_list interval_timer[R8A66597_MAX_NUM_PIPE]; unsigned short address_map; unsigned short timeout_map; + unsigned short interval_map; unsigned char pipe_cnt[R8A66597_MAX_NUM_PIPE]; unsigned char dma_map;