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/*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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;
}
__critical while (!ao_intflash_dma_done)
ao_sleep(&ao_intflash_dma_done);
}
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;
ao_xmemcpy(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;
}
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