[PATCH] Use struct pointer instead of enum to set bitbang adapter

[Michael Karcher]

Signed-off-by: Michael Karcher 
---
 bitbang_spi.c |   23 ++++++-----------------
 flash.h       |   11 +++++------
 2 files changed, 11 insertions(+), 23 deletions(-)

diff --git a/bitbang_spi.c b/bitbang_spi.c
index b543fd4..9fd5542 100644
--- a/bitbang_spi.c
+++ b/bitbang_spi.c
@@ -29,45 +29,34 @@
 /* Length of half a clock period in usecs. */
 static int bitbang_spi_half_period;

-static enum bitbang_spi_master bitbang_spi_master = BITBANG_SPI_INVALID;
-
-static const struct bitbang_spi_master_entry bitbang_spi_master_table[] = {
-	{}, /* This entry corresponds to BITBANG_SPI_INVALID. */
-};
-
-const int bitbang_spi_master_count = ARRAY_SIZE(bitbang_spi_master_table);
+static struct bitbang_spi_master * bitbang_spi_master = NULL;

/* Note that CS# is active low, so val=0 means the chip is active. */
 static void bitbang_spi_set_cs(int val)
 {
-	bitbang_spi_master_table[bitbang_spi_master].set_cs(val);
+	bitbang_spi_master->set_cs(val);
 }

static void bitbang_spi_set_sck(int val)
 {
-	bitbang_spi_master_table[bitbang_spi_master].set_sck(val);
+	bitbang_spi_master->set_sck(val);
 }

static void bitbang_spi_set_mosi(int val)
 {
-	bitbang_spi_master_table[bitbang_spi_master].set_mosi(val);
+	bitbang_spi_master->set_mosi(val);
 }

static int bitbang_spi_get_miso(void)
 {
-	return bitbang_spi_master_table[bitbang_spi_master].get_miso();
+	return bitbang_spi_master->get_miso();
 }

-int bitbang_spi_init(enum bitbang_spi_master master, int halfperiod)
+int bitbang_spi_init(struct bitbang_spi_master * master, int halfperiod)
 {
    bitbang_spi_master = master;
    bitbang_spi_half_period = halfperiod;

-	if (bitbang_spi_master == BITBANG_SPI_INVALID) {
-		msg_perr("Invalid bitbang SPI master. \n"
-			 "Please report a bug at [e-mail]\n");
-		return 1;
-	}
    bitbang_spi_set_cs(1);
    bitbang_spi_set_sck(0);
    bitbang_spi_set_mosi(0);
diff --git a/flash.h b/flash.h
index c858eba..88210db 100644
--- a/flash.h
+++ b/flash.h
@@ -127,13 +127,12 @@ 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 bitbang_spi_master {
-	BITBANG_SPI_INVALID /* This must always be the last entry. */
+enum bitbang_spi_master_type {
+	BITBANG_SPI_DUMMY	/* remove as soon as there is a real entry */
 };

-extern const int bitbang_spi_master_count;
-
-struct bitbang_spi_master_entry {
+struct bitbang_spi_master {
+	enum bitbang_spi_master_type type;
    void (*set_cs) (int val);
    void (*set_sck) (int val);
    void (*set_mosi) (int val);
@@ -531,7 +530,7 @@ 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, int start, int len);

/* bitbang_spi.c */
-int bitbang_spi_init(enum bitbang_spi_master master, int halfperiod);
+int bitbang_spi_init(struct bitbang_spi_master * master, int halfperiod);
 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, int start, int len);