nokia_fw.c
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/*
* This file is part of hci_h4p bluetooth driver
*
* Copyright (C) 2005, 2006 Nokia Corporation.
*
* Contact: Ville Tervo <ville.tervo@nokia.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/firmware.h>
#include <linux/clk.h>
#include <net/bluetooth/bluetooth.h>
#include "hci_h4p.h"
#define FW_NAME_TI1271_PRELE "ti1273_prele.bin"
#define FW_NAME_TI1271_LE "ti1273_le.bin"
#define FW_NAME_TI1271 "ti1273.bin"
#define FW_NAME_BCM2048 "bcmfw.bin"
#define FW_NAME_CSR "bc4fw.bin"
static int fw_pos;
/* Firmware handling */
static int hci_h4p_open_firmware(struct hci_h4p_info *info,
const struct firmware **fw_entry)
{
int err;
fw_pos = 0;
BT_DBG("Opening firmware man_id 0x%.2x ver_id 0x%.2x",
info->man_id, info->ver_id);
switch (info->man_id) {
case H4P_ID_TI1271:
switch (info->ver_id) {
case 0xe1:
err = request_firmware(fw_entry, FW_NAME_TI1271_PRELE,
info->dev);
break;
case 0xd1:
case 0xf1:
err = request_firmware(fw_entry, FW_NAME_TI1271_LE,
info->dev);
break;
default:
err = request_firmware(fw_entry, FW_NAME_TI1271,
info->dev);
}
break;
case H4P_ID_CSR:
err = request_firmware(fw_entry, FW_NAME_CSR, info->dev);
break;
case H4P_ID_BCM2048:
err = request_firmware(fw_entry, FW_NAME_BCM2048, info->dev);
break;
default:
dev_err(info->dev, "Invalid chip type\n");
*fw_entry = NULL;
err = -EINVAL;
}
return err;
}
static void hci_h4p_close_firmware(const struct firmware *fw_entry)
{
release_firmware(fw_entry);
}
/* Read fw. Return length of the command. If no more commands in
* fw 0 is returned. In error case return value is negative.
*/
static int hci_h4p_read_fw_cmd(struct hci_h4p_info *info, struct sk_buff **skb,
const struct firmware *fw_entry, gfp_t how)
{
unsigned int cmd_len;
if (fw_pos >= fw_entry->size)
return 0;
if (fw_pos + 2 > fw_entry->size) {
dev_err(info->dev, "Corrupted firmware image 1\n");
return -EMSGSIZE;
}
cmd_len = fw_entry->data[fw_pos++];
cmd_len += fw_entry->data[fw_pos++] << 8;
if (cmd_len == 0)
return 0;
if (fw_pos + cmd_len > fw_entry->size) {
dev_err(info->dev, "Corrupted firmware image 2\n");
return -EMSGSIZE;
}
*skb = bt_skb_alloc(cmd_len, how);
if (!*skb) {
dev_err(info->dev, "Cannot reserve memory for buffer\n");
return -ENOMEM;
}
memcpy(skb_put(*skb, cmd_len), &fw_entry->data[fw_pos], cmd_len);
fw_pos += cmd_len;
return (*skb)->len;
}
int hci_h4p_read_fw(struct hci_h4p_info *info, struct sk_buff_head *fw_queue)
{
const struct firmware *fw_entry = NULL;
struct sk_buff *skb = NULL;
int err;
err = hci_h4p_open_firmware(info, &fw_entry);
if (err < 0 || !fw_entry)
goto err_clean;
while ((err = hci_h4p_read_fw_cmd(info, &skb, fw_entry, GFP_KERNEL))) {
if (err < 0 || !skb)
goto err_clean;
skb_queue_tail(fw_queue, skb);
}
/* Chip detection code does neg and alive stuff
* discard two first skbs */
skb = skb_dequeue(fw_queue);
if (!skb) {
err = -EMSGSIZE;
goto err_clean;
}
kfree_skb(skb);
skb = skb_dequeue(fw_queue);
if (!skb) {
err = -EMSGSIZE;
goto err_clean;
}
kfree_skb(skb);
err_clean:
hci_h4p_close_firmware(fw_entry);
return err;
}
int hci_h4p_send_fw(struct hci_h4p_info *info, struct sk_buff_head *fw_queue)
{
int err;
switch (info->man_id) {
case H4P_ID_CSR:
err = hci_h4p_bc4_send_fw(info, fw_queue);
break;
case H4P_ID_TI1271:
err = hci_h4p_ti1273_send_fw(info, fw_queue);
break;
case H4P_ID_BCM2048:
err = hci_h4p_bcm_send_fw(info, fw_queue);
break;
default:
dev_err(info->dev, "Don't know how to send firmware\n");
err = -EINVAL;
}
return err;
}
void hci_h4p_parse_fw_event(struct hci_h4p_info *info, struct sk_buff *skb)
{
switch (info->man_id) {
case H4P_ID_CSR:
hci_h4p_bc4_parse_fw_event(info, skb);
break;
case H4P_ID_TI1271:
hci_h4p_ti1273_parse_fw_event(info, skb);
break;
case H4P_ID_BCM2048:
hci_h4p_bcm_parse_fw_event(info, skb);
break;
default:
dev_err(info->dev, "Don't know how to parse fw event\n");
info->fw_error = -EINVAL;
}
return;
}
MODULE_FIRMWARE(FW_NAME_TI1271_PRELE);
MODULE_FIRMWARE(FW_NAME_TI1271_LE);
MODULE_FIRMWARE(FW_NAME_TI1271);
MODULE_FIRMWARE(FW_NAME_BCM2048);
MODULE_FIRMWARE(FW_NAME_CSR);