Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / board / compulab / common / eeprom.c

diff --git a/qemu/roms/u-boot/board/compulab/common/eeprom.c b/qemu/roms/u-boot/board/compulab/common/eeprom.c
new file mode 100644 (file)
index 0000000..5aa3dbd
--- /dev/null
+++ b/qemu/roms/u-boot/board/compulab/common/eeprom.c
@@ -0,0 +1,121 @@
+/*
+ * (C) Copyright 2011 CompuLab, Ltd. <www.compulab.co.il>
+ *
+ * Authors: Nikita Kiryanov <nikita@compulab.co.il>
+ *         Igor Grinberg <grinberg@compulab.co.il>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <i2c.h>
+
+#define EEPROM_LAYOUT_VER_OFFSET       44
+#define BOARD_SERIAL_OFFSET            20
+#define BOARD_SERIAL_OFFSET_LEGACY     8
+#define BOARD_REV_OFFSET               0
+#define BOARD_REV_OFFSET_LEGACY                6
+#define BOARD_REV_SIZE                 2
+#define MAC_ADDR_OFFSET                        4
+#define MAC_ADDR_OFFSET_LEGACY         0
+
+#define LAYOUT_INVALID 0
+#define LAYOUT_LEGACY  0xff
+
+static int cl_eeprom_layout; /* Implicitly LAYOUT_INVALID */
+
+static int cl_eeprom_read(uint offset, uchar *buf, int len)
+{
+       return i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, offset,
+                       CONFIG_SYS_I2C_EEPROM_ADDR_LEN, buf, len);
+}
+
+static int cl_eeprom_setup_layout(void)
+{
+       int res;
+
+       if (cl_eeprom_layout != LAYOUT_INVALID)
+               return 0;
+
+       res = cl_eeprom_read(EEPROM_LAYOUT_VER_OFFSET,
+                            (uchar *)&cl_eeprom_layout, 1);
+       if (res) {
+               cl_eeprom_layout = LAYOUT_INVALID;
+               return res;
+       }
+
+       if (cl_eeprom_layout == 0 || cl_eeprom_layout >= 0x20)
+               cl_eeprom_layout = LAYOUT_LEGACY;
+
+       return 0;
+}
+
+void get_board_serial(struct tag_serialnr *serialnr)
+{
+       u32 serial[2];
+       uint offset;
+
+       memset(serialnr, 0, sizeof(*serialnr));
+
+       if (cl_eeprom_setup_layout())
+               return;
+
+       offset = (cl_eeprom_layout != LAYOUT_LEGACY) ?
+               BOARD_SERIAL_OFFSET : BOARD_SERIAL_OFFSET_LEGACY;
+
+       if (cl_eeprom_read(offset, (uchar *)serial, 8))
+               return;
+
+       if (serial[0] != 0xffffffff && serial[1] != 0xffffffff) {
+               serialnr->low = serial[0];
+               serialnr->high = serial[1];
+       }
+}
+
+/*
+ * Routine: cl_eeprom_read_mac_addr
+ * Description: read mac address and store it in buf.
+ */
+int cl_eeprom_read_mac_addr(uchar *buf)
+{
+       uint offset;
+
+       if (cl_eeprom_setup_layout())
+               return 0;
+
+       offset = (cl_eeprom_layout != LAYOUT_LEGACY) ?
+                       MAC_ADDR_OFFSET : MAC_ADDR_OFFSET_LEGACY;
+
+       return cl_eeprom_read(offset, buf, 6);
+}
+
+/*
+ * Routine: cl_eeprom_get_board_rev
+ * Description: read system revision from eeprom
+ */
+u32 cl_eeprom_get_board_rev(void)
+{
+       u32 rev = 0;
+       char str[5]; /* Legacy representation can contain at most 4 digits */
+       uint offset = BOARD_REV_OFFSET_LEGACY;
+
+       if (cl_eeprom_setup_layout())
+               return 0;
+
+       if (cl_eeprom_layout != LAYOUT_LEGACY)
+               offset = BOARD_REV_OFFSET;
+
+       if (cl_eeprom_read(offset, (uchar *)&rev, BOARD_REV_SIZE))
+               return 0;
+
+       /*
+        * Convert legacy syntactic representation to semantic
+        * representation. i.e. for rev 1.00: 0x100 --> 0x64
+        */
+       if (cl_eeprom_layout == LAYOUT_LEGACY) {
+               sprintf(str, "%x", rev);
+               rev = simple_strtoul(str, NULL, 10);
+       }
+
+       return rev;
+};