mirror of
https://github.com/bluekitchen/btstack.git
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120 lines
4.2 KiB
C
120 lines
4.2 KiB
C
/*
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* Copyright (C) 2009-2012 by Matthias Ringwald
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holders nor the names of
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* 4. Any redistribution, use, or modification is done solely for
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* personal benefit and not for any commercial purpose or for
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* monetary gain.
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*
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* THIS SOFTWARE IS PROVIDED BY MATTHIAS RINGWALD AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS
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* RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Please inquire about commercial licensing options at contact@bluekitchen-gmbh.com
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*
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*/
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/*
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* bt_control_bcm.c
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*
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* Adapter to use Broadcom-based chipsets with BTstack
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*/
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#include "btstack_config.h"
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#include <stddef.h> /* NULL */
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#include <stdio.h>
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#include <string.h> /* memcpy */
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#include "btstack_control.h"
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#include "btstack_debug.h"
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#include "btstack_chipset_bcm.h"
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// actual init script provided by separate bt_firmware_image.c from WICED SDK
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extern const uint8_t brcm_patchram_buf[];
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extern const int brcm_patch_ram_length;
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extern const char brcm_patch_version[];
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//
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static uint32_t init_script_offset;
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static int send_download_command;
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static void chipset_init(const void * config){
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log_info("Broadcom init script %s, len %u", brcm_patch_version, brcm_patch_ram_length);
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init_script_offset = 0;
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send_download_command = 1;
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}
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// @note: Broadcom chips require higher UART clock for baud rate > 3000000 -> limit baud rate in hci.c
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static void chipset_set_baudrate_command(uint32_t baudrate, uint8_t *hci_cmd_buffer){
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hci_cmd_buffer[0] = 0x18;
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hci_cmd_buffer[1] = 0xfc;
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hci_cmd_buffer[2] = 0x06;
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hci_cmd_buffer[3] = 0x00;
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hci_cmd_buffer[4] = 0x00;
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little_endian_store_32(hci_cmd_buffer, 5, baudrate);
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}
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// @note: bd addr has to be set after sending init script (it might just get re-set)
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static void chipset_set_bd_addr_command(bd_addr_t addr, uint8_t *hci_cmd_buffer){
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hci_cmd_buffer[0] = 0x01;
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hci_cmd_buffer[1] = 0xfc;
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hci_cmd_buffer[2] = 0x06;
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reverse_bd_addr(addr, &hci_cmd_buffer[3]);
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}
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static btstack_chipset_result_t chipset_next_command(uint8_t * hci_cmd_buffer){
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// send download firmware command
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if (send_download_command){
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send_download_command = 0;
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hci_cmd_buffer[0] = 0x2e;
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hci_cmd_buffer[1] = 0xfc;
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hci_cmd_buffer[2] = 0x00;
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return BTSTACK_CHIPSET_VALID_COMMAND;
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}
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if (init_script_offset >= brcm_patch_ram_length) {
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return BTSTACK_CHIPSET_DONE;
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}
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int cmd_len = 3 + brcm_patchram_buf[init_script_offset+2];
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memcpy(&hci_cmd_buffer[0], &brcm_patchram_buf[init_script_offset], cmd_len);
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init_script_offset += cmd_len;
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return BTSTACK_CHIPSET_VALID_COMMAND;
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}
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static const btstack_chipset_t btstack_chipset_bcm = {
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"BCM",
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chipset_init,
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chipset_next_command,
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chipset_set_baudrate_command,
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chipset_set_bd_addr_command,
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};
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// MARK: public API
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const btstack_chipset_t * btstack_chipset_bcm_instance(void){
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return &btstack_chipset_bcm;
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}
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