1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 /* 39 * bt_control_csr.c 40 * 41 * Adapter to use CSR-based chipsets with BTstack 42 * 43 */ 44 45 #include "bt_control_csr.h" 46 47 #include <stddef.h> /* NULL */ 48 #include <stdio.h> 49 #include <string.h> /* memcpy */ 50 51 #include "btstack_control.h" 52 #include "btstack_debug.h" 53 #include "btstack_util.h" 54 #include "hci_transport.h" 55 56 // minimal CSR init script to configure PSKEYs and activate them 57 static const uint8_t init_script[] = { 58 // Set ANA_Freq PSKEY to 26MHz 59 0x01, 0x00, 0xFC, 0x13, 0xc2, 0x02, 0x00, 0x09, 0x00, 0x01, 0x00, 0x03, 0x70, 0x00, 0x00, 0xfe, 0x01, 0x01, 0x00, 0x00, 0x00, 0x90, 0x65, 60 // Set HCI_NOP_DISABLE 61 0x01, 0x00, 0xFC, 0x13, 0xc2, 0x02, 0x00, 0x09, 0x00, 0x01, 0x00, 0x03, 0x70, 0x00, 0x00, 0xf2, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 62 // Set UART baudrate to 115200 63 0x01, 0x00, 0xFC, 0x15, 0xc2, 0x02, 0x00, 0x0a, 0x00, 0x02, 0x00, 0x03, 0x70, 0x00, 0x00, 0xea, 0x01, 0x02, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0xc2, 64 // WarmReset 65 0x01, 0x00, 0xFC, 0x13, 0xc2, 0x02, 0x00, 0x09, 0x00, 0x03, 0x0e, 0x02, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 66 }; 67 static const uint16_t init_script_size = sizeof(init_script); 68 69 // 70 static uint32_t init_script_offset = 0; 71 static hci_transport_config_uart_t * hci_transport_config_uart = NULL; 72 73 static void chipset_init(void * config){ 74 init_script_offset = 0; 75 hci_transport_config_uart = NULL; 76 // check for hci_transport_config_uart_t 77 if (!config) return; 78 if (((hci_transport_config_t*)config)->type != HCI_TRANSPORT_CONFIG_UART) return; 79 hci_transport_config_uart = (hci_transport_config_uart_t*) config; 80 } 81 82 static void chipset_set_baudrate_command(uint32_t baudrate, uint8_t *hci_cmd_buffer){ 83 } 84 85 // set requested baud rate 86 static void update_init_script_command(uint8_t *hci_cmd_buffer){ 87 uint16_t varid = READ_BT_16(hci_cmd_buffer, 10); 88 if (varid != 0x7003) return; 89 uint16_t key = READ_BT_16(hci_cmd_buffer, 14); 90 if (key != 0x01ea) return; 91 92 // check for baud rate 93 if (!hci_transport_config_uart) return; 94 uint32_t baudrate = hci_transport_config_uart->baudrate_main; 95 if (baudrate == 0){ 96 baudrate = hci_transport_config_uart->baudrate_init; 97 } 98 // uint32_t is stored as 2 x uint16_t with most important 16 bits first 99 bt_store_16(hci_cmd_buffer, 20, baudrate >> 16); 100 bt_store_16(hci_cmd_buffer, 22, baudrate & 0xffff); 101 } 102 103 static btstack_chipset_result_t chipset_next_command(uint8_t * hci_cmd_buffer){ 104 105 if (init_script_offset >= init_script_size) { 106 return BTSTACK_CHIPSET_DONE; 107 } 108 109 // init script is stored with the HCI Command Packet Type 110 init_script_offset++; 111 // copy command header 112 memcpy(&hci_cmd_buffer[0], (uint8_t *) &init_script[init_script_offset], 3); 113 init_script_offset += 3; 114 int payload_len = hci_cmd_buffer[2]; 115 // copy command payload 116 memcpy(&hci_cmd_buffer[3], (uint8_t *) &init_script[init_script_offset], payload_len); 117 118 // support for on-the-fly configuration updates 119 update_init_script_command(hci_cmd_buffer); 120 121 init_script_offset += payload_len; 122 123 // support for warm boot command 124 uint16_t varid = READ_BT_16(hci_cmd_buffer, 10); 125 log_info("csr: varid 0x%04x", varid); 126 if (varid == 0x4002){ 127 return BTSTACK_CHIPSET_WARMSTART_REQUIRED; 128 } 129 130 return BTSTACK_CHIPSET_VALID_COMMAND; 131 } 132 133 134 static const btstack_chipset_t btstack_chipset_bcm = { 135 "BCM", 136 chipset_init, 137 chipset_next_command, 138 chipset_set_baudrate_command, 139 NULL, // chipset_set_bd_addr_command not supported or implemented 140 }; 141 142 // MARK: public API 143 const btstack_chipset_t * btstack_chipset_csr_instance(void){ 144 return &btstack_chipset_bcm; 145 } 146