This is the bitbanging SPI driver infrastructure

If you want support for a particular piece of hardware, just fill in
a few functions in spi_bitbang_master_table. That's it.
On top of this, the RayeR SPI flasher should be supportable in ~20 LOC.

Tested, trace looks OK.

Corresponding to flashrom svn r736.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>

1 files changed, 23 insertions, 0 deletions

diff --git a/flash.h b/flash.h
index 8e0ad7f..376204a 100644
--- a/flash.h
+++ b/flash.h
@@ -145,6 +145,21 @@ uint32_t chip_readl(const chipaddr addr);
 void chip_readn(uint8_t *buf, const chipaddr addr, size_t len);
 void programmer_delay(int usecs);
 
+enum spi_bitbang_master {
+	SPI_BITBANG_INVALID /* This must always be the last entry. */
+};
+
+extern const int spi_bitbang_master_count;
+
+extern enum spi_bitbang_master spi_bitbang_master;
+
+struct spi_bitbang_master_entry {
+	void (*set_cs) (int val);
+	void (*set_sck) (int val);
+	void (*set_mosi) (int val);
+	int (*get_miso) (void);
+};
+
 #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
 
 enum chipbustype {
@@ -444,6 +459,14 @@ int ft2232_spi_send_command(unsigned int writecnt, unsigned int readcnt, const u
 int ft2232_spi_read(struct flashchip *flash, uint8_t *buf, int start, int len);
 int ft2232_spi_write_256(struct flashchip *flash, uint8_t *buf);
 
+/* bitbang_spi.c */
+extern int bitbang_half_period;
+extern const struct spi_bitbang_master_entry spi_bitbang_master_table[];
+int bitbang_spi_init(void);
+int bitbang_spi_send_command(unsigned int writecnt, unsigned int readcnt, const unsigned char *writearr, unsigned char *readarr);
+int bitbang_spi_read(struct flashchip *flash, uint8_t *buf, int start, int len);
+int bitbang_spi_write_256(struct flashchip *flash, uint8_t *buf);
+
 /* flashrom.c */
 extern char *programmer_param;
 extern int verbose;