Merge branch 'spi' of git://git.denx.de/u-boot-x86

7 files changed, 99 insertions, 22 deletions

diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c
index db66fd31f2..26f44cb597 100644
--- a/arch/sandbox/cpu/os.c
+++ b/arch/sandbox/cpu/os.c
@@ -161,7 +161,7 @@ static struct option *long_opts;
 
 int os_parse_args(struct sandbox_state *state, int argc, char *argv[])
 {
-	struct sb_cmdline_option **sb_opt = __u_boot_sandbox_option_start;
+	struct sandbox_cmdline_option **sb_opt = __u_boot_sandbox_option_start;
 	size_t num_options = __u_boot_sandbox_option_count();
 	size_t i;
 
diff --git a/arch/sandbox/cpu/start.c b/arch/sandbox/cpu/start.c
index f1cb7930b1..1b15454784 100644
--- a/arch/sandbox/cpu/start.c
+++ b/arch/sandbox/cpu/start.c
@@ -13,7 +13,7 @@
 int sandbox_early_getopt_check(void)
 {
 	struct sandbox_state *state = state_get_current();
-	struct sb_cmdline_option **sb_opt = __u_boot_sandbox_option_start;
+	struct sandbox_cmdline_option **sb_opt = __u_boot_sandbox_option_start;
 	size_t num_options = __u_boot_sandbox_option_count();
 	size_t i;
 	int max_arg_len, max_noarg_len;
@@ -40,7 +40,7 @@ int sandbox_early_getopt_check(void)
 	max_noarg_len = max_arg_len + 7;
 
 	for (i = 0; i < num_options; ++i) {
-		struct sb_cmdline_option *opt = sb_opt[i];
+		struct sandbox_cmdline_option *opt = sb_opt[i];
 
 		/* first output the short flag if it has one */
 		if (opt->flag_short >= 0x100)
@@ -61,12 +61,12 @@ int sandbox_early_getopt_check(void)
 	os_exit(0);
 }
 
-static int sb_cmdline_cb_help(struct sandbox_state *state, const char *arg)
+static int sandbox_cmdline_cb_help(struct sandbox_state *state, const char *arg)
 {
 	/* just flag to sandbox_early_getopt_check to show usage */
 	return 1;
 }
-SB_CMDLINE_OPT_SHORT(help, 'h', 0, "Display help");
+SANDBOX_CMDLINE_OPT_SHORT(help, 'h', 0, "Display help");
 
 int sandbox_main_loop_init(void)
 {
@@ -81,19 +81,20 @@ int sandbox_main_loop_init(void)
 	return 0;
 }
 
-static int sb_cmdline_cb_command(struct sandbox_state *state, const char *arg)
+static int sandbox_cmdline_cb_command(struct sandbox_state *state,
+				      const char *arg)
 {
 	state->cmd = arg;
 	return 0;
 }
-SB_CMDLINE_OPT_SHORT(command, 'c', 1, "Execute U-Boot command");
+SANDBOX_CMDLINE_OPT_SHORT(command, 'c', 1, "Execute U-Boot command");
 
-static int sb_cmdline_cb_fdt(struct sandbox_state *state, const char *arg)
+static int sandbox_cmdline_cb_fdt(struct sandbox_state *state, const char *arg)
 {
 	state->fdt_fname = arg;
 	return 0;
 }
-SB_CMDLINE_OPT_SHORT(fdt, 'd', 1, "Specify U-Boot's control FDT");
+SANDBOX_CMDLINE_OPT_SHORT(fdt, 'd', 1, "Specify U-Boot's control FDT");
 
 int main(int argc, char *argv[])
 {
diff --git a/arch/sandbox/include/asm/config.h b/arch/sandbox/include/asm/config.h
index 7755a4deff..ec7729eb4c 100644
--- a/arch/sandbox/include/asm/config.h
+++ b/arch/sandbox/include/asm/config.h
@@ -9,4 +9,12 @@
 
 #define CONFIG_SANDBOX_ARCH
 
+/* Used by drivers/spi/sandbox_spi.c and arch/sandbox/include/asm/state.h */
+#ifndef CONFIG_SANDBOX_SPI_MAX_BUS
+#define CONFIG_SANDBOX_SPI_MAX_BUS 1
+#endif
+#ifndef CONFIG_SANDBOX_SPI_MAX_CS
+#define CONFIG_SANDBOX_SPI_MAX_CS 10
+#endif
+
 #endif
diff --git a/arch/sandbox/include/asm/getopt.h b/arch/sandbox/include/asm/getopt.h
index 685883cd3f..3048c2cc30 100644
--- a/arch/sandbox/include/asm/getopt.h
+++ b/arch/sandbox/include/asm/getopt.h
@@ -18,7 +18,7 @@ struct sandbox_state;
  * consumer code should focus on the macros below and
  * the callback function.
  */
-struct sb_cmdline_option {
+struct sandbox_cmdline_option {
 	/* The long flag name: "help" for "--help" */
 	const char *flag;
 	/* The (optional) short flag name: "h" for "-h" */
@@ -35,18 +35,19 @@ struct sb_cmdline_option {
  * Internal macro to expand the lower macros into the necessary
  * magic junk that makes this all work.
  */
-#define _SB_CMDLINE_OPT(f, s, ha, h) \
-	static struct sb_cmdline_option sb_cmdline_option_##f = { \
+#define _SANDBOX_CMDLINE_OPT(f, s, ha, h) \
+	static struct sandbox_cmdline_option sandbox_cmdline_option_##f = { \
 		.flag = #f, \
 		.flag_short = s, \
 		.help = h, \
 		.has_arg = ha, \
-		.callback = sb_cmdline_cb_##f, \
+		.callback = sandbox_cmdline_cb_##f, \
 	}; \
 	/* Ppointer to the struct in a special section for the linker script */ \
 	static __attribute__((section(".u_boot_sandbox_getopt"), used)) \
-		struct sb_cmdline_option *sb_cmdline_option_##f##_ptr = \
-		&sb_cmdline_option_##f
+		struct sandbox_cmdline_option \
+			*sandbox_cmdline_option_##f##_ptr = \
+			&sandbox_cmdline_option_##f
 
 /**
  * Macros for end code to declare new command line flags.
@@ -56,16 +57,16 @@ struct sb_cmdline_option {
  * @param h   The help string displayed when showing --help
  *
  * This invocation:
- *   SB_CMDLINE_OPT(foo, 0, "The foo arg");
+ *   SANDBOX_CMDLINE_OPT(foo, 0, "The foo arg");
  * Will create a new flag named "--foo" (no short option) that takes
  * no argument.  If the user specifies "--foo", then the callback func
- * sb_cmdline_cb_foo() will automatically be called.
+ * sandbox_cmdline_cb_foo() will automatically be called.
  */
-#define SB_CMDLINE_OPT(f, ha, h) _SB_CMDLINE_OPT(f, 0, ha, h)
+#define SANDBOX_CMDLINE_OPT(f, ha, h) _SANDBOX_CMDLINE_OPT(f, 0, ha, h)
 /*
  * Same as above, but @s is used to specify a short flag e.g.
- *   SB_CMDLINE_OPT(foo, 'f', 0, "The foo arg");
+ *   SANDBOX_CMDLINE_OPT(foo, 'f', 0, "The foo arg");
  */
-#define SB_CMDLINE_OPT_SHORT(f, s, ha, h) _SB_CMDLINE_OPT(f, s, ha, h)
+#define SANDBOX_CMDLINE_OPT_SHORT(f, s, ha, h) _SANDBOX_CMDLINE_OPT(f, s, ha, h)
 
 #endif
diff --git a/arch/sandbox/include/asm/sections.h b/arch/sandbox/include/asm/sections.h
index 4c378600b0..fbc1bd11a3 100644
--- a/arch/sandbox/include/asm/sections.h
+++ b/arch/sandbox/include/asm/sections.h
@@ -11,9 +11,9 @@
 
 #include <asm-generic/sections.h>
 
-struct sb_cmdline_option;
+struct sandbox_cmdline_option;
 
-extern struct sb_cmdline_option *__u_boot_sandbox_option_start[],
+extern struct sandbox_cmdline_option *__u_boot_sandbox_option_start[],
 	*__u_boot_sandbox_option_end[];
 
 static inline size_t __u_boot_sandbox_option_count(void)
diff --git a/arch/sandbox/include/asm/spi.h b/arch/sandbox/include/asm/spi.h
new file mode 100644
index 0000000000..49b4a0f103
--- /dev/null
+++ b/arch/sandbox/include/asm/spi.h
@@ -0,0 +1,58 @@
+/*
+ * Simulate a SPI port and clients (see README.sandbox for details)
+ *
+ * Copyright (c) 2011-2013 The Chromium OS Authors.
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef __ASM_SPI_H__
+#define __ASM_SPI_H__
+
+#include <linux/types.h>
+
+/*
+ * The interface between the SPI bus and the SPI client.  The bus will
+ * instantiate a client, and that then call into it via these entry
+ * points.  These should be enough for the client to emulate the SPI
+ * device just like the real hardware.
+ */
+struct sandbox_spi_emu_ops {
+	/* The bus wants to instantiate a new client, so setup everything */
+	int (*setup)(void **priv, const char *spec);
+	/* The bus is done with us, so break things down */
+	void (*free)(void *priv);
+	/* The CS has been "activated" -- we won't worry about low/high */
+	void (*cs_activate)(void *priv);
+	/* The CS has been "deactivated" -- we won't worry about low/high */
+	void (*cs_deactivate)(void *priv);
+	/* The client is rx-ing bytes from the bus, so it should tx some */
+	int (*xfer)(void *priv, const u8 *rx, u8 *tx, uint bytes);
+};
+
+/*
+ * There are times when the data lines are allowed to tristate.  What
+ * is actually sensed on the line depends on the hardware.  It could
+ * always be 0xFF/0x00 (if there are pull ups/downs), or things could
+ * float and so we'd get garbage back.  This func encapsulates that
+ * scenario so we can worry about the details here.
+ */
+static inline void sandbox_spi_tristate(u8 *buf, uint len)
+{
+	/* XXX: make this into a user config option ? */
+	memset(buf, 0xff, len);
+}
+
+/*
+ * Extract the bus/cs from the spi spec and return the start of the spi
+ * client spec.  If the bus/cs are invalid for the current config, then
+ * it returns NULL.
+ *
+ * Example: arg="0:1:foo" will set bus to 0, cs to 1, and return "foo"
+ */
+const char *sandbox_spi_parse_spec(const char *arg, unsigned long *bus,
+				   unsigned long *cs);
+
+#endif
diff --git a/arch/sandbox/include/asm/state.h b/arch/sandbox/include/asm/state.h
index 093c81d918..a38820bdee 100644
--- a/arch/sandbox/include/asm/state.h
+++ b/arch/sandbox/include/asm/state.h
@@ -15,6 +15,11 @@ enum exit_type_id {
 	STATE_EXIT_POWER_OFF,
 };
 
+struct sandbox_spi_info {
+	const char *spec;
+	const struct sandbox_spi_emu_ops *ops;
+};
+
 /* The complete state of the test system */
 struct sandbox_state {
 	const char *cmd;		/* Command to execute */
@@ -23,6 +28,10 @@ struct sandbox_state {
 	const char *parse_err;		/* Error to report from parsing */
 	int argc;			/* Program arguments */
 	char **argv;
+
+	/* Pointer to information for each SPI bus/cs */
+	struct sandbox_spi_info spi[CONFIG_SANDBOX_SPI_MAX_BUS]
+					[CONFIG_SANDBOX_SPI_MAX_CS];
 };
 
 /**