beginning of SPI support

board/pcm038/pcm038.c

@@ -27,9 +27,11 @@
 #include <fec.h>
 #include <asm/arch/gpio.h>
 #include <asm/armlinux.h>
+#include <asm/mach-types.h>
 #include <partition.h>
 #include <fs.h>
 #include <fcntl.h>
+#include <spi/spi.h>
 
 static struct device_d cfi_dev = {
 	.name     = "cfi_flash",
@@ -61,6 +63,21 @@ static struct device_d fec_dev = {
 	.type     = DEVICE_TYPE_ETHER,
 };
 
+static struct device_d spi_dev = {
+	.name     = "imx_spi",
+	.id       = "spi0",
+	.map_base = 0x1000e000,
+};
+
+static struct spi_board_info pcm038_spi_board_info[] = {
+	{
+		.name = "mc13783",
+		.max_speed_hz = 3000000,
+		.bus_num = 0,
+		.chip_select = 0,
+	}
+};
+
 static int pcm038_devices_init(void)
 {
 	int i;
@@ -96,6 +113,9 @@ static int pcm038_devices_init(void)
 	register_device(&cfi_dev);
 	register_device(&sdram_dev);
 	register_device(&fec_dev);
+	register_device(&spi_dev);
+
+	spi_register_boardinfo(pcm038_spi_board_info, ARRAY_SIZE(pcm038_spi_board_info));
 
 	dev_add_partition(&cfi_dev, 0x00000, 0x20000, PARTITION_FIXED, "self");
 	dev_add_partition(&cfi_dev, 0x20000, 0x20000, PARTITION_FIXED, "env");

drivers/Kconfig

@@ -2,6 +2,7 @@ menu "Drivers                       "
 
 source "drivers/serial/Kconfig"
 source "drivers/net/Kconfig"
+source "drivers/spi/Kconfig"
 
 menu "flash drivers                 "
 

drivers/Makefile

@@ -1,6 +1,7 @@
 obj-y	+= net/
 obj-y	+= serial/
 obj-y	+= nand/
+obj-$(CONFIG_SPI) += spi/
 obj-$(CONFIG_DRIVER_CFI_OLD) += cfi_flash.o
 obj-$(CONFIG_DRIVER_CFI_NEW) += cfi_flash_new.o
 obj-$(CONFIG_DRIVER_CFI_INTEL) += cfi_flash_intel.o

drivers/spi/Kconfig

@@ -0,0 +1,14 @@
+menu "SPI drivers                   "
+
+config SPI
+	bool
+	default y
+
+config DRIVER_SPI_IMX
+	bool "i.MX SPI Master driver"
+	depends on ARCH_IMX
+
+config DRIVER_SPI_MC13783
+	bool "MC13783 a.k.a. PMIC driver"
+
+endmenu

drivers/spi/Makefile

@@ -0,0 +1,4 @@
+obj-y += spi.o
+obj-$(CONFIG_DRIVER_SPI_IMX) += imx_spi.o
+
+obj-$(CONFIG_DRIVER_SPI_MC13783) += mc13783.o

drivers/spi/imx_spi.c

@@ -0,0 +1,30 @@
+#include <common.h>
+#include <init.h>
+#include <driver.h>
+#include <spi/spi.h>
+#include <xfuncs.h>
+
+static int imx_spi_probe(struct device_d *dev)
+{
+	struct spi_master *master;
+
+	master = xmalloc(sizeof(struct spi_master));
+
+	spi_register_master(master);
+
+	return 0;
+}
+
+static struct driver_d imx_spi_driver = {
+	.name  = "imx_spi",
+	.probe = imx_spi_probe,
+};
+
+static int imx_spi_init(void)
+{
+        register_driver(&imx_spi_driver);
+        return 0;
+}
+
+device_initcall(imx_spi_init);
+

drivers/spi/mc13783.c

@@ -0,0 +1,27 @@
+#include <common.h>
+#include <init.h>
+#include <driver.h>
+#include <spi/spi.h>
+#include <xfuncs.h>
+
+static int pmic_probe(struct device_d *dev)
+{
+	printf("%s\n", __FUNCTION__);
+
+	return 0;
+}
+
+static struct driver_d pmic_driver = {
+	.name  = "mc13783",
+	.probe = pmic_probe,
+};
+
+static int pmic_init(void)
+{
+	printf("%s\n", __FUNCTION__);
+        register_driver(&pmic_driver);
+        return 0;
+}
+
+device_initcall(pmic_init);
+

drivers/spi/spi.c

@@ -0,0 +1,14 @@
+#include <common.h>
+#include <spi/spi.h>
+
+int spi_register_boardinfo(struct spi_board_info *info, int num)
+{
+	printf("%s\n", __FUNCTION__);
+	return 0;
+}
+
+int spi_register_master(struct spi_master *master)
+{
+	printf("%s\n", __FUNCTION__);
+	return 0;
+}

include/spi/spi.h

@@ -0,0 +1,35 @@
+#ifndef __INCLUDE_SPI_H
+#define __INCLUDE_SPI_H
+
+struct spi_board_info {
+	char	*name;
+	int 	max_speed_hz;
+	int	bus_num;
+	int	chip_select;
+};
+
+struct spi_master {
+};
+
+struct spi_transfer {
+	/* it's ok if tx_buf == rx_buf (right?)
+	 * for MicroWire, one buffer must be null
+	 * buffers must work with dma_*map_single() calls, unless
+	 *   spi_message.is_dma_mapped reports a pre-existing mapping
+	 */
+	const void	*tx_buf;
+	void		*rx_buf;
+	unsigned	len;
+
+	unsigned	cs_change:1;
+	u8		bits_per_word;
+	u16		delay_usecs;
+	u32		speed_hz;
+
+	struct list_head transfer_list;
+};
+
+int spi_register_boardinfo(struct spi_board_info *info, int num);
+int spi_register_master(struct spi_master *master);
+
+#endif /* __INCLUDE_SPI_H */