1 /*
2 * dspdrv.c
3 *
4 * DSP-BIOS Bridge driver support functions for TI OMAP processors.
5 *
6 * Interface to allocate and free bridge resources.
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
19 /* ----------------------------------- Host OS */
20 #include <linux/types.h>
21 #include <dspbridge/host_os.h>
22
23 /* ----------------------------------- DSP/BIOS Bridge */
24 #include <dspbridge/dbdefs.h>
25
26 /* ----------------------------------- Trace & Debug */
27 #include <dspbridge/dbc.h>
28
29 /* ----------------------------------- Platform Manager */
30 #include <dspbridge/drv.h>
31 #include <dspbridge/dev.h>
32 #include <dspbridge/dspapi.h>
33
34 /* ----------------------------------- Resource Manager */
35 #include <dspbridge/mgr.h>
36
37 /* ----------------------------------- This */
38 #include <dspbridge/dspdrv.h>
39
40 /*
41 * ======== dsp_init ========
42 * Allocates bridge resources. Loads a base image onto DSP, if specified.
43 */
dsp_init(u32 * init_status)44 u32 dsp_init(u32 *init_status)
45 {
46 char dev_node[MAXREGPATHLENGTH] = "TIOMAP1510";
47 int status = -EPERM;
48 struct drv_object *drv_obj = NULL;
49 u32 device_node;
50 u32 device_node_string;
51
52 if (!api_init())
53 goto func_cont;
54
55 status = drv_create(&drv_obj);
56 if (status) {
57 api_exit();
58 goto func_cont;
59 }
60
61 /* End drv_create */
62 /* Request Resources */
63 status = drv_request_resources((u32) &dev_node, &device_node_string);
64 if (!status) {
65 /* Attempt to Start the Device */
66 status = dev_start_device((struct cfg_devnode *)
67 device_node_string);
68 if (status)
69 (void)drv_release_resources
70 ((u32) device_node_string, drv_obj);
71 } else {
72 dev_dbg(bridge, "%s: drv_request_resources Failed\n", __func__);
73 status = -EPERM;
74 }
75
76 /* Unwind whatever was loaded */
77 if (status) {
78 /* irrespective of the status of dev_remove_device we conitinue
79 * unloading. Get the Driver Object iterate through and remove.
80 * Reset the status to E_FAIL to avoid going through
81 * api_init_complete2. */
82 for (device_node = drv_get_first_dev_extension();
83 device_node != 0;
84 device_node = drv_get_next_dev_extension(device_node)) {
85 (void)dev_remove_device((struct cfg_devnode *)
86 device_node);
87 (void)drv_release_resources((u32) device_node, drv_obj);
88 }
89 /* Remove the Driver Object */
90 (void)drv_destroy(drv_obj);
91 drv_obj = NULL;
92 api_exit();
93 dev_dbg(bridge, "%s: Logical device failed init\n", __func__);
94 } /* Unwinding the loaded drivers */
95 func_cont:
96 /* Attempt to Start the Board */
97 if (!status) {
98 /* BRD_AutoStart could fail if the dsp execuetable is not the
99 * correct one. We should not propagate that error
100 * into the device loader. */
101 (void)api_init_complete2();
102 } else {
103 dev_dbg(bridge, "%s: Failed\n", __func__);
104 } /* End api_init_complete2 */
105 DBC_ENSURE((!status && drv_obj != NULL) ||
106 (status && drv_obj == NULL));
107 *init_status = status;
108 /* Return the Driver Object */
109 return (u32) drv_obj;
110 }
111
112 /*
113 * ======== dsp_deinit ========
114 * Frees the resources allocated for bridge.
115 */
dsp_deinit(u32 device_context)116 bool dsp_deinit(u32 device_context)
117 {
118 bool ret = true;
119 u32 device_node;
120 struct mgr_object *mgr_obj = NULL;
121 struct drv_data *drv_datap = dev_get_drvdata(bridge);
122
123 while ((device_node = drv_get_first_dev_extension()) != 0) {
124 (void)dev_remove_device((struct cfg_devnode *)device_node);
125
126 (void)drv_release_resources((u32) device_node,
127 (struct drv_object *)device_context);
128 }
129
130 (void)drv_destroy((struct drv_object *)device_context);
131
132 /* Get the Manager Object from driver data
133 * MGR Destroy will unload the DCD dll */
134 if (drv_datap && drv_datap->mgr_object) {
135 mgr_obj = drv_datap->mgr_object;
136 (void)mgr_destroy(mgr_obj);
137 } else {
138 pr_err("%s: Failed to retrieve the object handle\n", __func__);
139 }
140
141 api_exit();
142
143 return ret;
144 }
145