1// SPDX-License-Identifier: GPL-2.0+
  2/*
  3 * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
  4 * All rights reserved.
  5 *
  6 * File: baseband.c
  7 *
  8 * Purpose: Implement functions to access baseband
  9 *
 10 * Author: Yiching Chen
 11 *
 12 * Date: May 20, 2004
 13 *
 14 * Functions:
 15 *
 16 * Revision History:
 17 *
 18 */
 19
 20#include <linux/compiler.h>
 21#include "firmware.h"
 22#include "usbpipe.h"
 23
 24#define FIRMWARE_VERSION	0x133		/* version 1.51 */
 25#define FIRMWARE_NAME		"vntwusb.fw"
 26
 27#define FIRMWARE_CHUNK_SIZE	0x400
 28
 29int vnt_download_firmware(struct vnt_private *priv)
 30{
 31	struct device *dev = &priv->usb->dev;
 32	const struct firmware *fw;
 33	void *buffer = NULL;
 34	u16 length;
 35	int ii;
 36	int ret = 0;
 37
 38	dev_dbg(dev, "---->Download firmware\n");
 39
 40	ret = request_firmware(&fw, FIRMWARE_NAME, dev);
 41	if (ret) {
 42		dev_err(dev, "firmware file %s request failed (%d)\n",
 43			FIRMWARE_NAME, ret);
 44		goto end;
 45	}
 46
 47	buffer = kmalloc(FIRMWARE_CHUNK_SIZE, GFP_KERNEL);
 48	if (!buffer) {
 49		ret = -ENOMEM;
 50		goto free_fw;
 51	}
 52
 53	for (ii = 0; ii < fw->size; ii += FIRMWARE_CHUNK_SIZE) {
 54		length = min_t(int, fw->size - ii, FIRMWARE_CHUNK_SIZE);
 55		memcpy(buffer, fw->data + ii, length);
 56
 57		ret = vnt_control_out(priv, 0, 0x1200 + ii, 0x0000, length,
 58				      buffer);
 59		if (ret)
 60			goto free_buffer;
 61
 62		dev_dbg(dev, "Download firmware...%d %zu\n", ii, fw->size);
 63	}
 64
 65free_buffer:
 66	kfree(buffer);
 67free_fw:
 68	release_firmware(fw);
 69end:
 70	return ret;
 71}
 72MODULE_FIRMWARE(FIRMWARE_NAME);
 73
 74int vnt_firmware_branch_to_sram(struct vnt_private *priv)
 75{
 76	dev_dbg(&priv->usb->dev, "---->Branch to Sram\n");
 77
 78	return vnt_control_out(priv, 1, 0x1200, 0x0000, 0, NULL);
 79}
 80
 81int vnt_check_firmware_version(struct vnt_private *priv)
 82{
 83	int ret = 0;
 84
 85	ret = vnt_control_in(priv, MESSAGE_TYPE_READ, 0,
 86			     MESSAGE_REQUEST_VERSION, 2,
 87			     (u8 *)&priv->firmware_version);
 88	if (ret) {
 89		dev_dbg(&priv->usb->dev,
 90			"Could not get firmware version: %d.\n", ret);
 91		goto end;
 92	}
 93
 94	dev_dbg(&priv->usb->dev, "Firmware Version [%04x]\n",
 95		priv->firmware_version);
 96
 97	if (priv->firmware_version == 0xFFFF) {
 98		dev_dbg(&priv->usb->dev, "In Loader.\n");
 99		ret = -EINVAL;
100		goto end;
101	}
102
103	if (priv->firmware_version < FIRMWARE_VERSION) {
104		/* branch to loader for download new firmware */
105		ret = vnt_firmware_branch_to_sram(priv);
106		if (ret) {
107			dev_dbg(&priv->usb->dev,
108				"Could not branch to SRAM: %d.\n", ret);
109		} else {
110			ret = -EINVAL;
111		}
112	}
113
114end:
115	return ret;
116}