1 files changed, 118 insertions, 0 deletions
diff --git a/firmware/zpu/usrp2p/spi_flash.h b/firmware/zpu/usrp2p/spi_flash.h
new file mode 100644
index 000000000..8a8facdca
--- /dev/null
+++ b/firmware/zpu/usrp2p/spi_flash.h
@@ -0,0 +1,118 @@
+/* -*- c -*- */
+/*
+ * Copyright 2009 Free Software Foundation, Inc.
+ * Copyright 2009-2011 Ettus Research LLC
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef INCLUDED_SPI_FLASH_H
+#define INCLUDED_SPI_FLASH_H
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdbool.h>
+
+#define SPI_FLASH_PAGE_SIZE	256
+#define SPI_SS_FLASH 1
+
+#define SPIF_PUSH_RISE   0             // push tx data on rising edge of SCLK
+#define SPIF_PUSH_FALL   SPI_CTRL_TXNEG        // push tx data on falling edge of SCLK
+#define SPIF_LATCH_RISE  0             // latch rx data on rising edge of SCLK
+#define SPIF_LATCH_FALL  SPI_CTRL_RXNEG        // latch rx data on falling edge of SCLK
+
+void spif_init(void);
+void spif_wait(void);
+
+uint32_t spif_transact(bool readback, int slave, uint32_t data, int length, uint32_t flags);
+
+uint32_t spi_flash_rdid(void);	/* Read ID */
+uint32_t spi_flash_rdsr(void);	/* Read Status Register */
+
+size_t spi_flash_log2_memory_size(void);
+size_t spi_flash_log2_sector_size(void);
+size_t spi_flash_sector_size(void);
+size_t spi_flash_memory_size(void);
+
+void spi_flash_read(uint32_t flash_addr,  size_t nbytes, void *buf);
+
+/*
+ * Erase all sectors that fall within the interval [flash_addr, flash_addr + nbytes).
+ * Erasing sets the memory to ones.
+ */
+void spi_flash_erase(uint32_t flash_addr, size_t nbytes);
+
+/*
+ * Program the flash.
+ * The area must have been erased prior to programming.
+ */
+bool spi_flash_program(uint32_t flash_addr, size_t nbytes, const void *buf);
+
+/*
+ * --- asynchronous routines ---
+ */
+
+/*
+ * Is the erasing or programming done?
+ */
+bool spi_flash_done_p(void);
+
+/*
+ * Wait for erasing or programming to complete
+ */
+void spi_flash_wait(void);
+
+/*
+ * Start the erase process on a single sector.
+ * (It takes between 1 and 3 seconds to erase a 64KB sector)
+ */
+void spi_flash_erase_sector_start(uint32_t flash_addr);
+
+/*
+ * Start the programming process within a single page.
+ * nbytes must be between 1 and 256.
+ * (It takes between 1.4 and 5 ms to program a page -> 640 ms for 64KB)
+ */
+bool spi_flash_page_program_start(uint32_t flash_addr, size_t nbytes, const void *buf);
+
+
+/*
+ * --- high-level async erase ---
+ */
+
+typedef struct {
+  uint32_t	first;
+  uint32_t	last;
+  uint32_t	current;
+} spi_flash_async_state_t;
+
+/*
+ * Start to erase all sectors that fall within the interval [flash_addr, flash_addr + nbytes).
+ * Erasing sets the memory to ones.
+ *
+ * Initializes s and begins the process.  Call spi_flash_async_erase_poll
+ * to test for completion and advance state machine.
+ */
+void spi_flash_async_erase_start(spi_flash_async_state_t *s,
+				 uint32_t flash_addr, size_t nbytes);
+
+/*
+ * Poll for aysnc flash erase completion.
+ * Returns true when the erase has completed.
+ * (This should be called at something >= 4 Hz.  It takes 1 to 3 seconds to
+ * erase each 64KB sector).
+ */
+bool spi_flash_async_erase_poll(spi_flash_async_state_t *s);
+
+
+#endif /* INCLUDED_SPI_FLASH_H */