1 /* Copyright (c) 2011,2012 Simon Schubert <2@0x2c.org>.
2 * Modifications by Jacob Alexander 2014 <haata@kiibohd.com>
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 3 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 // ----- Local Includes -----
25 // ----- Variables -----
28 * Unfortunately we can't DMA directly to FlexRAM, so we'll have to stage here.
30 static char staging[FLASH_SECTOR_SIZE];
34 // ----- Functions -----
36 static enum dfu_status setup_write(size_t off, size_t len, void **buf)
40 if (len > sizeof(staging))
41 return (DFU_STATUS_errADDRESS);
43 // We only allow the last write to be less than one sector size.
47 return (DFU_STATUS_errADDRESS);
48 if (len != FLASH_SECTOR_SIZE) {
50 memset(staging, 0xff, sizeof(staging));
54 return (DFU_STATUS_OK);
57 static enum dfu_status finish_write( void *buf, size_t off, size_t len )
61 return (DFU_STATUS_OK);
63 target = flash_get_staging_area(off + (uintptr_t)&_app_rom, FLASH_SECTOR_SIZE);
65 return (DFU_STATUS_errADDRESS);
66 memcpy(target, buf, len);
67 if (flash_program_sector(off + (uintptr_t)&_app_rom, FLASH_SECTOR_SIZE) != 0)
68 return (DFU_STATUS_errADDRESS);
69 return (DFU_STATUS_OK);
73 static struct dfu_ctx dfu_ctx;
75 void init_usb_bootloader( int config )
77 dfu_init(setup_write, finish_write, &dfu_ctx);
82 // Enabling LED to indicate we are in the bootloader
83 GPIOA_PDDR |= (1<<19);
84 // Setup pin - A19 - See Lib/pin_map.mchck for more details on pins
85 PORTA_PCR19 = PORT_PCR_SRE | PORT_PCR_DSE | PORT_PCR_MUX(1);
86 GPIOA_PSOR |= (1<<19);
88 flash_prepare_flashing();
90 usb_init( &dfu_device );