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