From 29d6678fd546377459ef75cf54abeef5b969b5cf Mon Sep 17 00:00:00 2001 From: Richard Purdie Date: Fri, 27 Aug 2010 15:14:24 +0100 Subject: Major layout change to the packages directory Having one monolithic packages directory makes it hard to find things and is generally overwhelming. This commit splits it into several logical sections roughly based on function, recipes.txt gives more information about the classifications used. The opportunity is also used to switch from "packages" to "recipes" as used in OpenEmbedded as the term "packages" can be confusing to people and has many different meanings. Not all recipes have been classified yet, this is just a first pass at separating things out. Some packages are moved to meta-extras as they're no longer actively used or maintained. Signed-off-by: Richard Purdie --- ...rewrite-host-periodic-endpoint-allocation.patch | 106 +++++++++++++++++++++ 1 file changed, 106 insertions(+) create mode 100644 meta/recipes-kernel/linux/linux-omap-2.6.29/musb/0004-USB-musb-rewrite-host-periodic-endpoint-allocation.patch (limited to 'meta/recipes-kernel/linux/linux-omap-2.6.29/musb/0004-USB-musb-rewrite-host-periodic-endpoint-allocation.patch') diff --git a/meta/recipes-kernel/linux/linux-omap-2.6.29/musb/0004-USB-musb-rewrite-host-periodic-endpoint-allocation.patch b/meta/recipes-kernel/linux/linux-omap-2.6.29/musb/0004-USB-musb-rewrite-host-periodic-endpoint-allocation.patch new file mode 100644 index 0000000000..438f11cf7a --- /dev/null +++ b/meta/recipes-kernel/linux/linux-omap-2.6.29/musb/0004-USB-musb-rewrite-host-periodic-endpoint-allocation.patch @@ -0,0 +1,106 @@ +From 9ebf351bcd28a89a0b1ba8d0496fffbc72421611 Mon Sep 17 00:00:00 2001 +From: Sergei Shtylyov +Date: Tue, 24 Mar 2009 17:22:50 -0700 +Subject: [PATCH] USB: musb: rewrite host periodic endpoint allocation + +The current MUSB host code doesn't make use of all the available +FIFOs in for periodic transfers since it wrongly assumes the RX +and TX sides of any given hw_ep always share one FIFO. + +Change: use 'in_qh' and 'out_qh' fields of the 'struct musb_hw_ep' +to check the endpoint's business; get rid of the now-unused 'periodic' +array in the 'struct musb'. Also optimize a loop induction variable +in the endpoint lookup code. + +(Based on a previous patch from Ajay Kumar Gupta ) + +[ dbrownell-Rn4VEauK+AKRv+LV9MX5uipxlwaOVQ5f@public.gmane.org: clarify description and origin + of this fix; whitespace ] + +Signed-off-by: Sergei Shtylyov +Signed-off-by: David Brownell +Cc: Felipe Balbi +Signed-off-by: Greg Kroah-Hartman +--- + drivers/usb/musb/musb_core.h | 1 - + drivers/usb/musb/musb_host.c | 28 +++++++++++----------------- + 2 files changed, 11 insertions(+), 18 deletions(-) + +diff --git a/drivers/usb/musb/musb_core.h b/drivers/usb/musb/musb_core.h +index 630946a..adf1806 100644 +--- a/drivers/usb/musb/musb_core.h ++++ b/drivers/usb/musb/musb_core.h +@@ -331,7 +331,6 @@ struct musb { + struct list_head control; /* of musb_qh */ + struct list_head in_bulk; /* of musb_qh */ + struct list_head out_bulk; /* of musb_qh */ +- struct musb_qh *periodic[32]; /* tree of interrupt+iso */ + #endif + + /* called with IRQs blocked; ON/nonzero implies starting a session, +diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c +index bd1d5ae..499c431 100644 +--- a/drivers/usb/musb/musb_host.c ++++ b/drivers/usb/musb/musb_host.c +@@ -390,7 +390,6 @@ musb_giveback(struct musb_qh *qh, struct urb *urb, int status) + * de-allocated if it's tracked and allocated; + * and where we'd update the schedule tree... + */ +- musb->periodic[ep->epnum] = NULL; + kfree(qh); + qh = NULL; + break; +@@ -1760,31 +1759,27 @@ static int musb_schedule( + + /* else, periodic transfers get muxed to other endpoints */ + +- /* FIXME this doesn't consider direction, so it can only +- * work for one half of the endpoint hardware, and assumes +- * the previous cases handled all non-shared endpoints... +- */ +- +- /* we know this qh hasn't been scheduled, so all we need to do ++ /* ++ * We know this qh hasn't been scheduled, so all we need to do + * is choose which hardware endpoint to put it on ... + * + * REVISIT what we really want here is a regular schedule tree +- * like e.g. OHCI uses, but for now musb->periodic is just an +- * array of the _single_ logical endpoint associated with a +- * given physical one (identity mapping logical->physical). +- * +- * that simplistic approach makes TT scheduling a lot simpler; +- * there is none, and thus none of its complexity... ++ * like e.g. OHCI uses. + */ + best_diff = 4096; + best_end = -1; + +- for (epnum = 1; epnum < musb->nr_endpoints; epnum++) { ++ for (epnum = 1, hw_ep = musb->endpoints + 1; ++ epnum < musb->nr_endpoints; ++ epnum++, hw_ep++) { + int diff; + +- if (musb->periodic[epnum]) ++ if (is_in || hw_ep->is_shared_fifo) { ++ if (hw_ep->in_qh != NULL) ++ continue; ++ } else if (hw_ep->out_qh != NULL) + continue; +- hw_ep = &musb->endpoints[epnum]; ++ + if (hw_ep == musb->bulk_ep) + continue; + +@@ -1824,7 +1819,6 @@ static int musb_schedule( + idle = 1; + qh->mux = 0; + hw_ep = musb->endpoints + best_end; +- musb->periodic[best_end] = qh; + DBG(4, "qh %p periodic slot %d\n", qh, best_end); + success: + if (head) { +-- +1.6.0.4 + -- cgit v1.2.3-54-g00ecf