e6bf74f06f
Remove OUT modifier which makes no sense for linux kernel Signed-off-by: Nishanth Menon <nm@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
143 lines
3.2 KiB
C
143 lines
3.2 KiB
C
/*
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* io.c
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*
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* DSP-BIOS Bridge driver support functions for TI OMAP processors.
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*
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* IO manager interface: Manages IO between CHNL and msg_ctrl.
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*
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* Copyright (C) 2005-2006 Texas Instruments, Inc.
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*
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* This package is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#include <linux/types.h>
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/* ----------------------------------- Host OS */
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#include <dspbridge/host_os.h>
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/* ----------------------------------- DSP/BIOS Bridge */
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#include <dspbridge/dbdefs.h>
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/* ----------------------------------- Trace & Debug */
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#include <dspbridge/dbc.h>
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/* ----------------------------------- OS Adaptation Layer */
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#include <dspbridge/cfg.h>
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/* ----------------------------------- Platform Manager */
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#include <dspbridge/dev.h>
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/* ----------------------------------- This */
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#include <ioobj.h>
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#include <dspbridge/iodefs.h>
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#include <dspbridge/io.h>
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/* ----------------------------------- Globals */
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static u32 refs;
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/*
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* ======== io_create ========
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* Purpose:
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* Create an IO manager object, responsible for managing IO between
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* CHNL and msg_ctrl
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*/
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int io_create(struct io_mgr **io_man, struct dev_object *hdev_obj,
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const struct io_attrs *mgr_attrts)
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{
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struct bridge_drv_interface *intf_fxns;
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struct io_mgr *hio_mgr = NULL;
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struct io_mgr_ *pio_mgr = NULL;
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int status = 0;
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DBC_REQUIRE(refs > 0);
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DBC_REQUIRE(io_man != NULL);
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DBC_REQUIRE(mgr_attrts != NULL);
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*io_man = NULL;
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/* A memory base of 0 implies no memory base: */
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if ((mgr_attrts->shm_base != 0) && (mgr_attrts->usm_length == 0))
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status = -EINVAL;
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if (mgr_attrts->word_size == 0)
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status = -EINVAL;
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if (DSP_SUCCEEDED(status)) {
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dev_get_intf_fxns(hdev_obj, &intf_fxns);
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/* Let Bridge channel module finish the create: */
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status = (*intf_fxns->pfn_io_create) (&hio_mgr, hdev_obj,
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mgr_attrts);
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if (DSP_SUCCEEDED(status)) {
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pio_mgr = (struct io_mgr_ *)hio_mgr;
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pio_mgr->intf_fxns = intf_fxns;
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pio_mgr->hdev_obj = hdev_obj;
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/* Return the new channel manager handle: */
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*io_man = hio_mgr;
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}
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}
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return status;
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}
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/*
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* ======== io_destroy ========
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* Purpose:
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* Delete IO manager.
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*/
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int io_destroy(struct io_mgr *hio_mgr)
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{
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struct bridge_drv_interface *intf_fxns;
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struct io_mgr_ *pio_mgr = (struct io_mgr_ *)hio_mgr;
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int status;
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DBC_REQUIRE(refs > 0);
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intf_fxns = pio_mgr->intf_fxns;
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/* Let Bridge channel module destroy the io_mgr: */
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status = (*intf_fxns->pfn_io_destroy) (hio_mgr);
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return status;
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}
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/*
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* ======== io_exit ========
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* Purpose:
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* Discontinue usage of the IO module.
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*/
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void io_exit(void)
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{
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DBC_REQUIRE(refs > 0);
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refs--;
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DBC_ENSURE(refs >= 0);
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}
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/*
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* ======== io_init ========
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* Purpose:
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* Initialize the IO module's private state.
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*/
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bool io_init(void)
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{
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bool ret = true;
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DBC_REQUIRE(refs >= 0);
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if (ret)
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refs++;
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DBC_ENSURE((ret && (refs > 0)) || (!ret && (refs >= 0)));
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return ret;
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}
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