From: Javen Xu <redacted>

This patch adds support for loading firmware. Download some parameters
for RTL8261C_CG.

Signed-off-by: Javen Xu <redacted>
---
Changes in v2:
 - remove __pack, struct rtl8261x_fw_header and rtl8261x_fw_entry will not pad
 - reverse xmas tree for some definition
 - add explanation on rtl_phy_write_mmd_bits()

Changes in v3:
 - add struct rtl8261x_priv

Changes in v4:
 - add struct device *dev

Changes in v5:
 - no changes

Changes in v6:
 - replace rtl_phy_write_mmd_bits with phy_modify_mmd, keep mdio lock
 - check msb and lsb at the beginning of rtl8261x_fw_execute_entry()
 - add comments on rtl8261x_config_init()

Changes in v7:
 - no changes
---
 drivers/net/phy/realtek/realtek_main.c | 220 +++++++++++++++++++++++++
 1 file changed, 220 insertions(+)

diff --git a/drivers/net/phy/realtek/realtek_main.c b/drivers/net/phy/realtek/realtek_main.c
index ef3700894ebf..bf7bc19fb44c 100644
--- a/drivers/net/phy/realtek/realtek_main.c
+++ b/drivers/net/phy/realtek/realtek_main.c

@@ -8,7 +8,9 @@
  * Copyright (c) 2004 Freescale Semiconductor, Inc.
  */
 #include <linux/bitops.h>
+#include <linux/crc32.h>
 #include <linux/ethtool_netlink.h>
+#include <linux/firmware.h>
 #include <linux/of.h>
 #include <linux/phy.h>
 #include <linux/pm_wakeirq.h>

@@ -281,6 +283,42 @@
 					 RTL8261X_INT_ALDPS_CHG | \
 					 RTL8261X_INT_JABBER)
 
+#define FW_MAIN_MAGIC			0x52544C38
+#define FW_SUB_MAGIC_8261C		0x32363143
+#define RTL8261X_POLL_TIMEOUT_MS	100
+
+#define RTL8261C_CE_FW_NAME	"rtl_nic/rtl8261c.bin"
+MODULE_FIRMWARE(RTL8261C_CE_FW_NAME);
+
+enum rtl8261x_fw_op {
+	OP_WRITE = 0x00,	/* Write */
+	OP_POLL  = 0x02,	/* Polling */
+};
+
+struct rtl8261x_fw_header {
+	__le32 main_magic;	/* Main magic number 0x52544C38 ("RTL8") */
+	__le32 sub_magic;	/* Sub magic number */
+	__le16 version_major;	/* Major version */
+	__le16 version_minor;	/* Minor version */
+	__le16 num_entries;	/* Number of entries */
+	__le16 reserved;	/* Reserved */
+	__le32 crc32;		/* CRC32 checksum */
+};
+
+struct rtl8261x_fw_entry {
+	__u8  type;		/* Operation type (OP_*) */
+	__u8  dev;		/* MMD device */
+	__le16 addr;		/* Register address */
+	__u8  msb;		/* MSB bit position */
+	__u8  lsb;		/* LSB bit position */
+	__le16 value;		/* Value to write/compare */
+	__le16 timeout_ms;	/* Poll timeout in milliseconds */
+	__u8  poll_set;		/* Poll for set (1) or clear (0) */
+	__u8  reserved;		/* Reserved */
+};