NET: Add Vitesse VSC7385 firmware uploading

The Vitesse VSC7385 is a 5-port switch found on the Freescale MPC8349E-mITX
and other boards.  A small firwmare must be uploaded to its on-board memory
before it can be enabled.  This patch adds the code which uploads firmware
(but not the firmware itself).

Previously, this feature was provided by a U-Boot application that was
made available only on Freescale BSPs.  The VSC7385 firmware must still
be obtained separately, but at least there is no longer a need for a separate
application.

Signed-off-by: Timur Tabi <timur@freescale.com>
Acked-by: Ben Warren <biggerbadderben@gmail.com>

1 files changed, 101 insertions, 0 deletions

diff --git a/drivers/net/vsc7385.c b/drivers/net/vsc7385.c
new file mode 100644
index 000000000..f440ce07e
--- /dev/null
+++ b/drivers/net/vsc7385.c
@@ -0,0 +1,101 @@
+/*
+ * Vitesse 7385 Switch Firmware Upload
+ *
+ * Author: Timur Tabi <timur@freescale.com>
+ *
+ * Copyright 2008 Freescale Semiconductor, Inc.  This file is licensed
+ * under the terms of the GNU General Public License version 2.  This
+ * program is licensed "as is" without any warranty of any kind, whether
+ * express or implied.
+ *
+ * This module uploads proprietary firmware for the Vitesse VSC7385 5-port
+ * switch.
+ */
+
+#include <config.h>
+
+#ifdef CONFIG_VSC7385_ENET
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/errno.h>
+
+/*
+ * Upload a Vitesse VSC7385 firmware image to the hardware
+ *
+ * This function takes a pointer to a VSC7385 firmware image and a size, and
+ * uploads that firmware to the VSC7385.
+ *
+ * This firmware is typically located at a board-specific flash address,
+ * and the size is typically 8KB.
+ *
+ * The firmware is Vitesse proprietary.
+ *
+ * Further details on the register information can be obtained from Vitesse.
+ */
+int vsc7385_upload_firmware(void *firmware, unsigned int size)
+{
+	u8 *fw = firmware;
+	unsigned int i;
+
+	u32 *gloreset = (u32 *) (CFG_VSC7385_BASE + 0x1c050);
+	u32 *icpu_ctrl = (u32 *) (CFG_VSC7385_BASE + 0x1c040);
+	u32 *icpu_addr = (u32 *) (CFG_VSC7385_BASE + 0x1c044);
+	u32 *icpu_data = (u32 *) (CFG_VSC7385_BASE + 0x1c048);
+	u32 *icpu_rom_map = (u32 *) (CFG_VSC7385_BASE + 0x1c070);
+#ifdef DEBUG
+	u32 *chipid = (u32 *) (CFG_VSC7385_BASE + 0x1c060);
+#endif
+
+	out_be32(gloreset, 3);
+	udelay(200);
+
+	out_be32(icpu_ctrl, 0x8E);
+	udelay(20);
+
+	out_be32(icpu_rom_map, 1);
+	udelay(20);
+
+        /* Write the firmware to I-RAM */
+	out_be32(icpu_addr, 0);
+	udelay(20);
+
+	for (i = 0; i < size; i++) {
+		out_be32(icpu_data, fw[i]);
+		udelay(20);
+		if (ctrlc())
+			return -EINTR;
+	}
+
+	/* Read back and compare */
+	out_be32(icpu_addr, 0);
+	udelay(20);
+
+	for (i = 0; i < size; i++) {
+		u8 value;
+
+		value = (u8) in_be32(icpu_data);
+		udelay(20);
+		if (value != fw[i]) {
+			debug("VSC7385: Upload mismatch: address 0x%x, "
+                              "read value 0x%x, image value 0x%x\n",
+                              i, value, fw[i]);
+
+			return -EIO;
+		}
+		if (ctrlc())
+			break;
+	}
+
+	out_be32(icpu_ctrl, 0x0B);
+	udelay(20);
+
+#ifdef DEBUG
+	printf("VSC7385: Chip ID is %08x\n", in_be32(chipid));
+	udelay(20);
+#endif
+
+	return 0;
+}
+
+#endif