+/*
+ * 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;
+}
projects / fw / altos / blobdiff