From 8d91c1e411f55d7ea91b1183a2e9f8088fb4d5be Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Tue, 15 Dec 2015 14:52:16 -0300 Subject: Linux-libre 4.3.2-gnu --- drivers/staging/ozwpan/ozusbsvc.c | 263 -------------------------------------- 1 file changed, 263 deletions(-) delete mode 100644 drivers/staging/ozwpan/ozusbsvc.c (limited to 'drivers/staging/ozwpan/ozusbsvc.c') diff --git a/drivers/staging/ozwpan/ozusbsvc.c b/drivers/staging/ozwpan/ozusbsvc.c deleted file mode 100644 index bf15dc301..000000000 --- a/drivers/staging/ozwpan/ozusbsvc.c +++ /dev/null @@ -1,263 +0,0 @@ -/* ----------------------------------------------------------------------------- - * Copyright (c) 2011 Ozmo Inc - * Released under the GNU General Public License Version 2 (GPLv2). - * - * This file provides protocol independent part of the implementation of the USB - * service for a PD. - * The implementation of this service is split into two parts the first of which - * is protocol independent and the second contains protocol specific details. - * This split is to allow alternative protocols to be defined. - * The implementation of this service uses ozhcd.c to implement a USB HCD. - * ----------------------------------------------------------------------------- - */ - -#include -#include -#include -#include -#include -#include -#include -#include "ozdbg.h" -#include "ozprotocol.h" -#include "ozeltbuf.h" -#include "ozpd.h" -#include "ozproto.h" -#include "ozusbif.h" -#include "ozhcd.h" -#include "ozusbsvc.h" - -/* - * This is called once when the driver is loaded to initialise the USB service. - * Context: process - */ -int oz_usb_init(void) -{ - return oz_hcd_init(); -} - -/* - * This is called once when the driver is unloaded to terminate the USB service. - * Context: process - */ -void oz_usb_term(void) -{ - oz_hcd_term(); -} - -/* - * This is called when the USB service is started or resumed for a PD. - * Context: softirq - */ -int oz_usb_start(struct oz_pd *pd, int resume) -{ - int rc = 0; - struct oz_usb_ctx *usb_ctx; - struct oz_usb_ctx *old_ctx; - - if (resume) { - oz_dbg(ON, "USB service resumed\n"); - return 0; - } - oz_dbg(ON, "USB service started\n"); - /* Create a USB context in case we need one. If we find the PD already - * has a USB context then we will destroy it. - */ - usb_ctx = kzalloc(sizeof(struct oz_usb_ctx), GFP_ATOMIC); - if (usb_ctx == NULL) - return -ENOMEM; - atomic_set(&usb_ctx->ref_count, 1); - usb_ctx->pd = pd; - usb_ctx->stopped = 0; - /* Install the USB context if the PD doesn't already have one. - * If it does already have one then destroy the one we have just - * created. - */ - spin_lock_bh(&pd->app_lock[OZ_APPID_USB]); - old_ctx = pd->app_ctx[OZ_APPID_USB]; - if (old_ctx == NULL) - pd->app_ctx[OZ_APPID_USB] = usb_ctx; - oz_usb_get(pd->app_ctx[OZ_APPID_USB]); - spin_unlock_bh(&pd->app_lock[OZ_APPID_USB]); - if (old_ctx) { - oz_dbg(ON, "Already have USB context\n"); - kfree(usb_ctx); - usb_ctx = old_ctx; - } else if (usb_ctx) { - /* Take a reference to the PD. This will be released when - * the USB context is destroyed. - */ - oz_pd_get(pd); - } - /* If we already had a USB context and had obtained a port from - * the USB HCD then just reset the port. If we didn't have a port - * then report the arrival to the USB HCD so we get one. - */ - if (usb_ctx->hport) { - oz_hcd_pd_reset(usb_ctx, usb_ctx->hport); - } else { - usb_ctx->hport = oz_hcd_pd_arrived(usb_ctx); - if (usb_ctx->hport == NULL) { - oz_dbg(ON, "USB hub returned null port\n"); - spin_lock_bh(&pd->app_lock[OZ_APPID_USB]); - pd->app_ctx[OZ_APPID_USB] = NULL; - spin_unlock_bh(&pd->app_lock[OZ_APPID_USB]); - oz_usb_put(usb_ctx); - rc = -1; - } - } - oz_usb_put(usb_ctx); - return rc; -} - -/* - * This is called when the USB service is stopped or paused for a PD. - * Context: softirq or process - */ -void oz_usb_stop(struct oz_pd *pd, int pause) -{ - struct oz_usb_ctx *usb_ctx; - - if (pause) { - oz_dbg(ON, "USB service paused\n"); - return; - } - spin_lock_bh(&pd->app_lock[OZ_APPID_USB]); - usb_ctx = (struct oz_usb_ctx *) pd->app_ctx[OZ_APPID_USB]; - pd->app_ctx[OZ_APPID_USB] = NULL; - spin_unlock_bh(&pd->app_lock[OZ_APPID_USB]); - if (usb_ctx) { - struct timespec ts, now; - - getnstimeofday(&ts); - oz_dbg(ON, "USB service stopping...\n"); - usb_ctx->stopped = 1; - /* At this point the reference count on the usb context should - * be 2 - one from when we created it and one from the hcd - * which claims a reference. Since stopped = 1 no one else - * should get in but someone may already be in. So wait - * until they leave but timeout after 1 second. - */ - while ((atomic_read(&usb_ctx->ref_count) > 2)) { - getnstimeofday(&now); - /*Approx 1 Sec. this is not perfect calculation*/ - if (now.tv_sec != ts.tv_sec) - break; - } - oz_dbg(ON, "USB service stopped\n"); - oz_hcd_pd_departed(usb_ctx->hport); - /* Release the reference taken in oz_usb_start. - */ - oz_usb_put(usb_ctx); - } -} - -/* - * This increments the reference count of the context area for a specific PD. - * This ensures this context area does not disappear while still in use. - * Context: softirq - */ -void oz_usb_get(void *hpd) -{ - struct oz_usb_ctx *usb_ctx = (struct oz_usb_ctx *)hpd; - - atomic_inc(&usb_ctx->ref_count); -} - -/* - * This decrements the reference count of the context area for a specific PD - * and destroys the context area if the reference count becomes zero. - * Context: irq or process - */ -void oz_usb_put(void *hpd) -{ - struct oz_usb_ctx *usb_ctx = (struct oz_usb_ctx *)hpd; - - if (atomic_dec_and_test(&usb_ctx->ref_count)) { - oz_dbg(ON, "Dealloc USB context\n"); - oz_pd_put(usb_ctx->pd); - kfree(usb_ctx); - } -} - -/* - * Context: softirq - */ -int oz_usb_heartbeat(struct oz_pd *pd) -{ - struct oz_usb_ctx *usb_ctx; - int rc = 0; - - spin_lock_bh(&pd->app_lock[OZ_APPID_USB]); - usb_ctx = (struct oz_usb_ctx *) pd->app_ctx[OZ_APPID_USB]; - if (usb_ctx) - oz_usb_get(usb_ctx); - spin_unlock_bh(&pd->app_lock[OZ_APPID_USB]); - if (usb_ctx == NULL) - return rc; - if (usb_ctx->stopped) - goto done; - if (usb_ctx->hport) - if (oz_hcd_heartbeat(usb_ctx->hport)) - rc = 1; -done: - oz_usb_put(usb_ctx); - return rc; -} - -/* - * Context: softirq - */ -int oz_usb_stream_create(void *hpd, u8 ep_num) -{ - struct oz_usb_ctx *usb_ctx = (struct oz_usb_ctx *)hpd; - struct oz_pd *pd = usb_ctx->pd; - - oz_dbg(ON, "%s: (0x%x)\n", __func__, ep_num); - if (pd->mode & OZ_F_ISOC_NO_ELTS) { - oz_isoc_stream_create(pd, ep_num); - } else { - oz_pd_get(pd); - if (oz_elt_stream_create(&pd->elt_buff, ep_num, - 4*pd->max_tx_size)) { - oz_pd_put(pd); - return -1; - } - } - return 0; -} - -/* - * Context: softirq - */ -int oz_usb_stream_delete(void *hpd, u8 ep_num) -{ - struct oz_usb_ctx *usb_ctx = (struct oz_usb_ctx *)hpd; - - if (usb_ctx) { - struct oz_pd *pd = usb_ctx->pd; - - if (pd) { - oz_dbg(ON, "%s: (0x%x)\n", __func__, ep_num); - if (pd->mode & OZ_F_ISOC_NO_ELTS) { - oz_isoc_stream_delete(pd, ep_num); - } else { - if (oz_elt_stream_delete(&pd->elt_buff, ep_num)) - return -1; - oz_pd_put(pd); - } - } - } - return 0; -} - -/* - * Context: softirq or process - */ -void oz_usb_request_heartbeat(void *hpd) -{ - struct oz_usb_ctx *usb_ctx = (struct oz_usb_ctx *)hpd; - - if (usb_ctx && usb_ctx->pd) - oz_pd_request_heartbeat(usb_ctx->pd); -} -- cgit v1.2.3-54-g00ecf