[PATCH u-boot aspeed-dev-v2019.04 7/7] cmd: Add FSI command

[Joel Stanley]

This allows a user to issue breaks, and read and write CFAM (remote FSI)
addresses.

The master to use on the command line can be selected from the probe
command.

 # fsi probe 0
 # fsi break

Signed-off-by: Joel Stanley <joel at jms.id.au>
---
 cmd/Kconfig  |   6 ++
 cmd/Makefile |   1 +
 cmd/fsi.c    | 153 +++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 160 insertions(+)
 create mode 100644 cmd/fsi.c

diff --git a/cmd/Kconfig b/cmd/Kconfig
index 68afd06b101e..221a07eed5a6 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -692,6 +692,12 @@ config CMD_FDC
 	help
 	  The 'fdtboot' command allows booting an image from a floppy disk.
 
+config CMD_FSI
+	bool "fsi - use FSI master"
+	depends on ASPEED_FSI
+	help
+	 The 'fsi' command allows use of the FSI master present in ASPEED SoCs
+
 config CMD_FLASH
 	bool "flinfo, erase, protect"
 	default y
diff --git a/cmd/Makefile b/cmd/Makefile
index 493f241f39d6..05bc0410d5d1 100644
--- a/cmd/Makefile
+++ b/cmd/Makefile
@@ -64,6 +64,7 @@ obj-$(CONFIG_CMD_FLASH) += flash.o
 obj-$(CONFIG_CMD_FPGA) += fpga.o
 obj-$(CONFIG_CMD_FPGAD) += fpgad.o
 obj-$(CONFIG_CMD_FS_GENERIC) += fs.o
+obj-$(CONFIG_CMD_FSI) += fsi.o
 obj-$(CONFIG_CMD_FUSE) += fuse.o
 obj-$(CONFIG_CMD_GETTIME) += gettime.o
 obj-$(CONFIG_CMD_GPIO) += gpio.o
diff --git a/cmd/fsi.c b/cmd/fsi.c
new file mode 100644
index 000000000000..7dacf7957961
--- /dev/null
+++ b/cmd/fsi.c
@@ -0,0 +1,153 @@
+#include <common.h>
+#include <command.h>
+#include <aspeed_fsi.h>
+#include <dm/device.h>
+#include <dm/uclass.h>
+
+struct fsi_master_aspeed *fsi;
+
+static void do_break(void)
+{
+	debug("%s\n", __func__);
+	aspeed_fsi_break(fsi, 0);
+}
+
+static void do_status(void)
+{
+	debug("%s\n", __func__);
+	aspeed_fsi_status(fsi);
+}
+
+static void do_getcfam(int argc, char *const argv[])
+{
+	int rc;
+	uint32_t addr, val;
+
+	if (argc != 3) {
+		printf("invalid arguments to getcfam\n");
+		return;
+	}
+
+	addr = simple_strtoul(argv[2], NULL, 16);
+
+	debug("%s %08x\n", __func__, addr);
+	rc = aspeed_fsi_read(fsi, 0, addr, &val, 4);
+	if (rc) {
+		printf("error reading: %d\n", rc);
+		return;
+	}
+
+	printf("0x%08x\n", be32_to_cpu(val));
+}
+
+static void do_putcfam(int argc, char *const argv[])
+{
+	int rc;
+	uint32_t addr, val;
+
+	if (argc != 4) {
+		printf("invalid arguments to putcfam\n");
+		return;
+	}
+
+	addr = simple_strtoul(argv[2], NULL, 16);
+	val = simple_strtoul(argv[3], NULL, 16);
+
+	debug("%s %08x %08x\n", __func__, addr, val);
+	rc = aspeed_fsi_write(fsi, 0, addr, &val, 4);
+	if (rc)
+		printf("error writing: %d\n", rc);
+}
+
+static void do_divisor(int argc, char *const argv[])
+{
+	int rc;
+	uint32_t val;
+
+	if (argc == 2) {
+		rc = aspeed_fsi_divisor(fsi, 0);
+		if (rc > 0)
+			printf("divsior: %d (%d MHz)\n", rc, rc * 166);
+	} else if (argc == 3) {
+		val = simple_strtoul(argv[2], NULL, 16);
+		rc = aspeed_fsi_divisor(fsi, val);
+	} else {
+		printf("invalid arguments to divisor\n");
+		return;
+	}
+
+	if (rc < 0)
+		printf("divisor error: %d\n", rc);
+}
+
+static struct fsi_master_aspeed *do_probe(int argc, char *const argv[])
+{
+	struct udevice *dev;
+	const char *devices[] = {"fsi at 1e79b000", "fsi at 1e79b100"};
+	int rc, id;
+
+	if (argc > 3) {
+		printf("invalid arguments to probe\n");
+		return NULL;
+	}
+
+	if (argc == 2)
+		id = 0;
+	else
+		id = simple_strtoul(argv[2], NULL, 10);
+
+	if (id > 1) {
+		printf("valid devices: 0, 1\n");
+		return NULL;
+	}
+
+	rc = uclass_get_device_by_name(UCLASS_MISC, devices[id], &dev);
+	if (rc) {
+		printf("fsi device %s not found\n", devices[id]);
+		return NULL;
+	}
+	return dev_get_priv(dev);
+}
+
+
+static int do_fsi(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
+{
+
+	if (!strcmp(argv[1], "probe")) {
+		fsi = do_probe(argc, argv);
+		return 0;
+	}
+
+	if (fsi == NULL) {
+		printf("Run probe first\n");
+		return -EINVAL;
+	}
+
+	if (!strcmp(argv[1], "break"))
+		do_break();
+	else if (!strcmp(argv[1], "status"))
+		do_status();
+	else if (!strncmp(argv[1], "put", 3))
+		do_putcfam(argc, argv);
+	else if (!strncmp(argv[1], "get", 3))
+		do_getcfam(argc, argv);
+	else if (!strncmp(argv[1], "div", 3))
+		do_divisor(argc, argv);
+
+	return 0;
+}
+
+static char fsi_help_text[] =
+	"fsi probe [<n>]\n"
+	"fsi break\n"
+	"fsi getcfam <addr>\n"
+	"fsi putcfam <addr> <value>\n"
+	"fsi divisor [<divisor>]\n"
+	"fsi status\n";
+
+U_BOOT_CMD(
+	fsi, 4, 1, do_fsi,
+	"IBM FSI commands",
+	fsi_help_text
+);
+
-- 
2.23.0