X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=blobdiff_plain;f=src%2Fcc1111%2Fao_intflash.c;fp=src%2Fcc1111%2Fao_intflash.c;h=d76d954e16a071f2cf7f924fd8ac676964f0673e;hp=0000000000000000000000000000000000000000;hb=9513be7f9d3d0b0ec29f6487fa9dc8f1ac24d0de;hpb=3bfe8df44b575ca430ffaa051e20faa955a06c03

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;
+}