Implement hard SPI driver on MPC8349EMDS

This patch implements the fsl_spi driver on the MPC8349EMDS evaluation board.
This board has an ST M25P40 4Mbit EEPROM on its SPI bus

Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>

diff --git a/board/freescale/mpc8349emds/mpc8349emds.c b/board/freescale/mpc8349emds/mpc8349emds.c
index 3d72eb7d894d7c723a9c89304e004103e97e13a7..3fb2a458eee33f73886807d9f00064d0a2b64874 100644 (file)
--- a/board/freescale/mpc8349emds/mpc8349emds.c
+++ b/board/freescale/mpc8349emds/mpc8349emds.c
@@ -27,6 +27,7 @@
 #include <mpc83xx.h>
 #include <asm/mpc8349_pci.h>
 #include <i2c.h>
+#include <spi.h>
 #include <spd.h>
 #include <miiphy.h>
 #if defined(CONFIG_SPD_EEPROM)
@@ -251,6 +252,34 @@ void sdram_init(void)
 }
 #endif
 
+/*
+ * The following are used to control the SPI chip selects for the SPI command.
+ */
+#ifdef CONFIG_HARD_SPI
+
+#define SPI_CS_MASK    0x80000000
+
+void spi_eeprom_chipsel(int cs)
+{
+       volatile gpio83xx_t *iopd = &((immap_t *)CFG_IMMR)->gpio[0];
+
+       if(cs)
+               iopd->dat &= ~SPI_CS_MASK;
+       else
+               iopd->dat |=  SPI_CS_MASK;
+}
+
+/*
+ * The SPI command uses this table of functions for controlling the SPI
+ * chip selects.
+ */
+spi_chipsel_type spi_chipsel[] = {
+       spi_eeprom_chipsel,
+};
+int spi_chipsel_cnt = sizeof(spi_chipsel) / sizeof(spi_chipsel[0]);
+
+#endif /* CONFIG_HARD_SPI */
+
 #if defined(CONFIG_OF_BOARD_SETUP)
 void ft_board_setup(void *blob, bd_t *bd)
 {

diff --git a/include/configs/MPC8349EMDS.h b/include/configs/MPC8349EMDS.h
index 437a9a5f7bfb1b7afcdf48be5d05010ca177109d..584c59de486dca9155a5985c16f4df0b5d24922b 100644 (file)
--- a/include/configs/MPC8349EMDS.h
+++ b/include/configs/MPC8349EMDS.h
@@ -355,6 +355,16 @@
 #define CFG_I2C_OFFSET         0x3000
 #define CFG_I2C2_OFFSET                0x3100
 
+/* SPI */
+#define CONFIG_HARD_SPI                        /* SPI with hardware support*/
+#undef CONFIG_SOFT_SPI                 /* SPI bit-banged */
+#define CONFIG_FSL_SPI
+
+/* GPIOs.  Used as SPI chip selects */
+#define CFG_GPIO1_PRELIM
+#define CFG_GPIO1_DIR          0xC0000000  /* SPI CS on 0, LED on 1 */
+#define CFG_GPIO1_DAT          0xC0000000  /* Both are active LOW */
+
 /* TSEC */
 #define CFG_TSEC1_OFFSET 0x24000
 #define CFG_TSEC1 (CFG_IMMR+CFG_TSEC1_OFFSET)