nios2: convert altera sysid to driver model
Convert altera sysid to driver model with misc uclass.
Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Acked-by: Chin Liang See <clsee@altera.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 031b4d8..101a619 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -13,6 +13,13 @@
set of generic read, write and ioctl methods may be used to
access the device.
+config ALTERA_SYSID
+ bool "Altera Sysid support"
+ depends on MISC
+ help
+ Select this to enable a sysid for Altera devices. Please find
+ details on the "Embedded Peripherals IP User Guide" of Altera.
+
config CMD_CROS_EC
bool "Enable crosec command"
depends on CROS_EC
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 7e76b12..aa137f5 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -7,6 +7,7 @@
obj-$(CONFIG_MISC) += misc-uclass.o
obj-$(CONFIG_ALI152X) += ali512x.o
+obj-$(CONFIG_ALTERA_SYSID) += altera_sysid.o
obj-$(CONFIG_DS4510) += ds4510.o
obj-$(CONFIG_CBMEM_CONSOLE) += cbmem_console.o
obj-$(CONFIG_CROS_EC) += cros_ec.o
diff --git a/drivers/misc/altera_sysid.c b/drivers/misc/altera_sysid.c
new file mode 100644
index 0000000..249b273
--- /dev/null
+++ b/drivers/misc/altera_sysid.c
@@ -0,0 +1,101 @@
+/*
+ * (C) Copyright 2004, Psyent Corporation <www.psyent.com>
+ * Scott McNutt <smcnutt@psyent.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <command.h>
+#include <dm.h>
+#include <errno.h>
+#include <misc.h>
+#include <linux/time.h>
+#include <asm/io.h>
+
+struct altera_sysid_regs {
+ u32 id; /* The system build id */
+ u32 timestamp; /* Timestamp */
+};
+
+struct altera_sysid_platdata {
+ struct altera_sysid_regs *regs;
+};
+
+void display_sysid(void)
+{
+ struct udevice *dev;
+ u32 sysid[2];
+ struct tm t;
+ char asc[32];
+ time_t stamp;
+ int ret;
+
+ /* the first misc device will be used */
+ ret = uclass_first_device(UCLASS_MISC, &dev);
+ if (ret)
+ return;
+ if (!dev)
+ return;
+ ret = misc_read(dev, 0, &sysid, sizeof(sysid));
+ if (ret)
+ return;
+
+ stamp = sysid[1];
+ localtime_r(&stamp, &t);
+ asctime_r(&t, asc);
+ printf("SYSID: %08x, %s", sysid[0], asc);
+}
+
+int do_sysid(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ display_sysid();
+ return 0;
+}
+
+U_BOOT_CMD(
+ sysid, 1, 1, do_sysid,
+ "display Nios-II system id",
+ ""
+);
+
+static int altera_sysid_read(struct udevice *dev,
+ int offset, void *buf, int size)
+{
+ struct altera_sysid_platdata *plat = dev->platdata;
+ struct altera_sysid_regs *const regs = plat->regs;
+ u32 *sysid = buf;
+
+ sysid[0] = readl(®s->id);
+ sysid[1] = readl(®s->timestamp);
+
+ return 0;
+}
+
+static int altera_sysid_ofdata_to_platdata(struct udevice *dev)
+{
+ struct altera_sysid_platdata *plat = dev_get_platdata(dev);
+
+ plat->regs = ioremap(dev_get_addr(dev),
+ sizeof(struct altera_sysid_regs));
+
+ return 0;
+}
+
+static const struct misc_ops altera_sysid_ops = {
+ .read = altera_sysid_read,
+};
+
+static const struct udevice_id altera_sysid_ids[] = {
+ { .compatible = "altr,sysid-1.0", },
+ { }
+};
+
+U_BOOT_DRIVER(altera_sysid) = {
+ .name = "altera_sysid",
+ .id = UCLASS_MISC,
+ .of_match = altera_sysid_ids,
+ .ofdata_to_platdata = altera_sysid_ofdata_to_platdata,
+ .platdata_auto_alloc_size = sizeof(struct altera_sysid_platdata),
+ .ops = &altera_sysid_ops,
+};