1 /*
2 * io.c
3 *
4 * DSP-BIOS Bridge driver support functions for TI OMAP processors.
5 *
6 * IO manager interface: Manages IO between CHNL and msg_ctrl.
7 *
8 * Copyright (C) 2005-2006 Texas Instruments, Inc.
9 *
10 * This package is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 *
14 * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
16 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
17 */
18 #include <linux/types.h>
19
20 /* ----------------------------------- Host OS */
21 #include <dspbridge/host_os.h>
22
23 /* ----------------------------------- DSP/BIOS Bridge */
24 #include <dspbridge/dbdefs.h>
25
26 /* ----------------------------------- Platform Manager */
27 #include <dspbridge/dev.h>
28
29 /* ----------------------------------- This */
30 #include <ioobj.h>
31 #include <dspbridge/io.h>
32
33 /*
34 * ======== io_create ========
35 * Purpose:
36 * Create an IO manager object, responsible for managing IO between
37 * CHNL and msg_ctrl
38 */
io_create(struct io_mgr ** io_man,struct dev_object * hdev_obj,const struct io_attrs * mgr_attrts)39 int io_create(struct io_mgr **io_man, struct dev_object *hdev_obj,
40 const struct io_attrs *mgr_attrts)
41 {
42 struct bridge_drv_interface *intf_fxns;
43 struct io_mgr *hio_mgr = NULL;
44 struct io_mgr_ *pio_mgr = NULL;
45 int status = 0;
46
47 *io_man = NULL;
48
49 /* A memory base of 0 implies no memory base: */
50 if ((mgr_attrts->shm_base != 0) && (mgr_attrts->sm_length == 0))
51 status = -EINVAL;
52
53 if (mgr_attrts->word_size == 0)
54 status = -EINVAL;
55
56 if (!status) {
57 dev_get_intf_fxns(hdev_obj, &intf_fxns);
58
59 /* Let Bridge channel module finish the create: */
60 status = (*intf_fxns->io_create) (&hio_mgr, hdev_obj,
61 mgr_attrts);
62
63 if (!status) {
64 pio_mgr = (struct io_mgr_ *)hio_mgr;
65 pio_mgr->intf_fxns = intf_fxns;
66 pio_mgr->dev_obj = hdev_obj;
67
68 /* Return the new channel manager handle: */
69 *io_man = hio_mgr;
70 }
71 }
72
73 return status;
74 }
75
76 /*
77 * ======== io_destroy ========
78 * Purpose:
79 * Delete IO manager.
80 */
io_destroy(struct io_mgr * hio_mgr)81 int io_destroy(struct io_mgr *hio_mgr)
82 {
83 struct bridge_drv_interface *intf_fxns;
84 struct io_mgr_ *pio_mgr = (struct io_mgr_ *)hio_mgr;
85 int status;
86
87 intf_fxns = pio_mgr->intf_fxns;
88
89 /* Let Bridge channel module destroy the io_mgr: */
90 status = (*intf_fxns->io_destroy) (hio_mgr);
91
92 return status;
93 }
94