diff options
Diffstat (limited to 'src/cc1111/ao_intflash.c')
| -rw-r--r-- | src/cc1111/ao_intflash.c | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/src/cc1111/ao_intflash.c b/src/cc1111/ao_intflash.c new file mode 100644 index 00000000..d76d954e --- /dev/null +++ b/src/cc1111/ao_intflash.c @@ -0,0 +1,209 @@ +/* + * Copyright © 2011 Anthony Towns <aj@erisian.com.au> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. + */ + +#include "ao.h" +#include "cc1111.h" + +#define ENDOFCODE (CODESIZE) +#define AO_INTFLASH_BLOCK 1024 +#define AO_INTFLASH_BLOCKS ((0x8000 - ENDOFCODE)/AO_INTFLASH_BLOCK) +#define AO_INTFLASH_SIZE (AO_INTFLASH_BLOCK * AO_INTFLASH_BLOCKS) +#define AO_INTFLASH_LOCATION (0x8000 - AO_INTFLASH_SIZE) + +/* + * 21000 * 24e6 + * FWT = ------------ + * 16e9 + * + * = 31.5 + * + * Round up and use 32 + */ + +#define FLASH_TIMING 0x20 + +#if AO_INTFLASH_BLOCKS < 2 +#error "Too few pages" +#endif + +#if AO_INFTLASH_LOCATION % 1024 != 0 +#error "Pages aren't aligned properly" +#endif + +__xdata __at(AO_INTFLASH_LOCATION) uint8_t ao_intflash[AO_INTFLASH_SIZE]; + +/* Total bytes of available storage */ +__pdata uint32_t ao_storage_total = sizeof(ao_intflash); + +/* Block size - device is erased in these units. */ +__pdata uint32_t ao_storage_block = AO_INTFLASH_BLOCK; + +/* Byte offset of config block. Will be ao_storage_block bytes long */ +__pdata uint32_t ao_storage_config = sizeof(ao_intflash) - AO_INTFLASH_BLOCK; + +/* Storage unit size - device reads and writes must be within blocks of this size. */ +__pdata uint16_t ao_storage_unit = AO_INTFLASH_BLOCK; + +__xdata static uint8_t ao_intflash_dma_done; +static uint8_t ao_intflash_dma; + +/* + * The internal flash chip is arranged in 1kB sectors; the + * chip cannot erase in units smaller than that. + * + * Writing happens in units of 2 bytes and + * can only change bits from 1 to 0. So, you can rewrite + * the same contents, or append to an existing page easily enough + */ + +/* + * Erase the specified sector + */ +uint8_t +ao_storage_erase(uint32_t pos) __reentrant +{ + uint16_t addr; + + if (pos >= ao_storage_total || pos + ao_storage_block > ao_storage_total) + return 0; + + addr = ((uint16_t)(ao_intflash + pos) >> 1); + + FADDRH = addr >> 8; + FADDRL = addr; + + __critical { + _asm + .even + orl _FCTL, #FCTL_ERASE; ; FCTL |= FCTL_ERASE + nop ; Required, see datasheet. + _endasm; + } + + return 1; +} + +/* + * Write to flash + */ + +static void +ao_intflash_write_aligned(uint16_t pos, __xdata void *d, uint16_t len) __reentrant +{ + pos = ((uint16_t) ao_intflash + pos) >> 1; + + ao_dma_set_transfer(ao_intflash_dma, + d, + &FWDATAXADDR, + len, + DMA_CFG0_WORDSIZE_8 | + DMA_CFG0_TMODE_SINGLE | + DMA_CFG0_TRIGGER_FLASH, + DMA_CFG1_SRCINC_1 | + DMA_CFG1_DESTINC_0 | + DMA_CFG1_PRIORITY_HIGH); + + FADDRH = pos >> 8; + FADDRL = pos; + + ao_dma_start(ao_intflash_dma); + + __critical { + _asm + .even + orl _FCTL, #FCTL_WRITE; ; FCTL |= FCTL_WRITE + nop + _endasm; + } +} + +static void +ao_intflash_write_byte(uint16_t pos, uint8_t byte) __reentrant +{ + static __xdata uint8_t b[2]; + + if (pos & 1) { + b[0] = 0xff; + b[1] = byte; + } else { + b[0] = byte; + b[1] = 0xff; + } + ao_intflash_write_aligned(pos, b, 2); +} + +uint8_t +ao_storage_device_write(uint32_t pos32, __xdata void *v, uint16_t len) __reentrant +{ + uint16_t pos = pos32; + __xdata uint8_t *d = v; + uint8_t oddlen; + + if (pos >= ao_storage_total || pos + len > ao_storage_total) + return 0; + if (len == 0) + return 1; + + if (pos & 1) { + ao_intflash_write_byte(pos++, *d++); + len--; + } + oddlen = len & 1; + len -= oddlen; + if (len) + ao_intflash_write_aligned(pos, d, len); + if (oddlen) + ao_intflash_write_byte(pos + len, d[len]); + + return 1; +} + +/* + * Read from flash + */ +uint8_t +ao_storage_device_read(uint32_t pos, __xdata void *d, uint16_t len) __reentrant +{ + if (pos >= ao_storage_total || pos + len > ao_storage_total) + return 0; + memcpy(d, ao_intflash+pos, len); + return 1; +} + +void +ao_storage_flush(void) __reentrant +{ +} + +void +ao_storage_setup(void) +{ +} + +void +ao_storage_device_info(void) __reentrant +{ + printf ("Using internal flash, starting at 0x%04x\n", AO_INTFLASH_LOCATION); +} + +void +ao_storage_device_init(void) +{ + ao_intflash_dma = ao_dma_alloc(&ao_intflash_dma_done); + + FWT = FLASH_TIMING; +} |