4 * DSP-BIOS Bridge driver support functions for TI OMAP processors.
6 * DSP API channel interface: multiplexes data streams through the single
7 * physical link managed by a Bridge Bridge driver.
9 * Copyright (C) 2005-2006 Texas Instruments, Inc.
11 * This package is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
15 * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
17 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 #include <linux/types.h>
21 /* ----------------------------------- Host OS */
22 #include <dspbridge/host_os.h>
24 /* ----------------------------------- DSP/BIOS Bridge */
25 #include <dspbridge/dbdefs.h>
27 /* ----------------------------------- Trace & Debug */
28 #include <dspbridge/dbc.h>
30 /* ----------------------------------- OS Adaptation Layer */
31 #include <dspbridge/sync.h>
33 /* ----------------------------------- Platform Manager */
34 #include <dspbridge/proc.h>
35 #include <dspbridge/dev.h>
37 /* ----------------------------------- Others */
38 #include <dspbridge/chnlpriv.h>
41 /* ----------------------------------- This */
42 #include <dspbridge/chnl.h>
44 /* ----------------------------------- Globals */
48 * ======== chnl_create ========
50 * Create a channel manager object, responsible for opening new channels
51 * and closing old ones for a given 'Bridge board.
53 int chnl_create(struct chnl_mgr **channel_mgr,
54 struct dev_object *hdev_obj,
55 const struct chnl_mgrattrs *mgr_attrts)
58 struct chnl_mgr *hchnl_mgr;
59 struct chnl_mgr_ *chnl_mgr_obj = NULL;
61 DBC_REQUIRE(refs > 0);
62 DBC_REQUIRE(channel_mgr != NULL);
63 DBC_REQUIRE(mgr_attrts != NULL);
68 if ((0 < mgr_attrts->max_channels) &&
69 (mgr_attrts->max_channels <= CHNL_MAXCHANNELS))
71 else if (mgr_attrts->max_channels == 0)
76 if (mgr_attrts->word_size == 0)
80 status = dev_get_chnl_mgr(hdev_obj, &hchnl_mgr);
81 if (!status && hchnl_mgr != NULL)
87 struct bridge_drv_interface *intf_fxns;
88 dev_get_intf_fxns(hdev_obj, &intf_fxns);
89 /* Let Bridge channel module finish the create: */
90 status = (*intf_fxns->chnl_create) (&hchnl_mgr, hdev_obj,
93 /* Fill in DSP API channel module's fields of the
94 * chnl_mgr structure */
95 chnl_mgr_obj = (struct chnl_mgr_ *)hchnl_mgr;
96 chnl_mgr_obj->intf_fxns = intf_fxns;
97 /* Finally, return the new channel manager handle: */
98 *channel_mgr = hchnl_mgr;
102 DBC_ENSURE(status || chnl_mgr_obj);
108 * ======== chnl_destroy ========
110 * Close all open channels, and destroy the channel manager.
112 int chnl_destroy(struct chnl_mgr *hchnl_mgr)
114 struct chnl_mgr_ *chnl_mgr_obj = (struct chnl_mgr_ *)hchnl_mgr;
115 struct bridge_drv_interface *intf_fxns;
118 DBC_REQUIRE(refs > 0);
121 intf_fxns = chnl_mgr_obj->intf_fxns;
122 /* Let Bridge channel module destroy the chnl_mgr: */
123 status = (*intf_fxns->chnl_destroy) (hchnl_mgr);
132 * ======== chnl_exit ========
134 * Discontinue usage of the CHNL module.
138 DBC_REQUIRE(refs > 0);
142 DBC_ENSURE(refs >= 0);
146 * ======== chnl_init ========
148 * Initialize the CHNL module's private state.
154 DBC_REQUIRE(refs >= 0);
159 DBC_ENSURE((ret && (refs > 0)) || (!ret && (refs >= 0)));