Commit c305a19a authored by Luis Carlos Cobo's avatar Luis Carlos Cobo Committed by John W. Linville
Browse files

libertas_tf: usb specific functions



The libertas thin firmware only supports usb devices, but the usb functions have
been kept separate to ease future support for other devices.
Signed-off-by: default avatarLuis Carlos Cobo <luisca@cozybit.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 691cdb49
/*
* Copyright (C) 2008, cozybit Inc.
* Copyright (C) 2003-2006, Marvell International Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*/
#include <linux/delay.h>
#include <linux/moduleparam.h>
#include <linux/firmware.h>
#include <linux/netdevice.h>
#include <linux/usb.h>
#define DRV_NAME "lbtf_usb"
#include "libertas_tf.h"
#include "if_usb.h"
#define MESSAGE_HEADER_LEN 4
static char *lbtf_fw_name = "lbtf_usb.bin";
module_param_named(fw_name, lbtf_fw_name, charp, 0644);
static struct usb_device_id if_usb_table[] = {
/* Enter the device signature inside */
{ USB_DEVICE(0x1286, 0x2001) },
{ USB_DEVICE(0x05a3, 0x8388) },
{} /* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, if_usb_table);
static void if_usb_receive(struct urb *urb);
static void if_usb_receive_fwload(struct urb *urb);
static int if_usb_prog_firmware(struct if_usb_card *cardp);
static int if_usb_host_to_card(struct lbtf_private *priv, uint8_t type,
uint8_t *payload, uint16_t nb);
static int usb_tx_block(struct if_usb_card *cardp, uint8_t *payload,
uint16_t nb, u8 data);
static void if_usb_free(struct if_usb_card *cardp);
static int if_usb_submit_rx_urb(struct if_usb_card *cardp);
static int if_usb_reset_device(struct if_usb_card *cardp);
/**
* if_usb_wrike_bulk_callback - call back to handle URB status
*
* @param urb pointer to urb structure
*/
static void if_usb_write_bulk_callback(struct urb *urb)
{
if (urb->status != 0)
printk(KERN_INFO "libertastf: URB in failure status: %d\n",
urb->status);
}
/**
* if_usb_free - free tx/rx urb, skb and rx buffer
*
* @param cardp pointer if_usb_card
*/
static void if_usb_free(struct if_usb_card *cardp)
{
/* Unlink tx & rx urb */
usb_kill_urb(cardp->tx_urb);
usb_kill_urb(cardp->rx_urb);
usb_kill_urb(cardp->cmd_urb);
usb_free_urb(cardp->tx_urb);
cardp->tx_urb = NULL;
usb_free_urb(cardp->rx_urb);
cardp->rx_urb = NULL;
usb_free_urb(cardp->cmd_urb);
cardp->cmd_urb = NULL;
kfree(cardp->ep_out_buf);
cardp->ep_out_buf = NULL;
}
static void if_usb_setup_firmware(struct lbtf_private *priv)
{
struct if_usb_card *cardp = priv->card;
struct cmd_ds_set_boot2_ver b2_cmd;
if_usb_submit_rx_urb(cardp);
b2_cmd.hdr.size = cpu_to_le16(sizeof(b2_cmd));
b2_cmd.action = 0;
b2_cmd.version = cardp->boot2_version;
if (lbtf_cmd_with_response(priv, CMD_SET_BOOT2_VER, &b2_cmd))
printk(KERN_INFO "libertastf: setting boot2 version failed\n");
}
static void if_usb_fw_timeo(unsigned long priv)
{
struct if_usb_card *cardp = (void *)priv;
if (!cardp->fwdnldover)
/* Download timed out */
cardp->priv->surpriseremoved = 1;
wake_up(&cardp->fw_wq);
}
/**
* if_usb_probe - sets the configuration values
*
* @ifnum interface number
* @id pointer to usb_device_id
*
* Returns: 0 on success, error code on failure
*/
static int if_usb_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct usb_device *udev;
struct usb_host_interface *iface_desc;
struct usb_endpoint_descriptor *endpoint;
struct lbtf_private *priv;
struct if_usb_card *cardp;
int i;
udev = interface_to_usbdev(intf);
cardp = kzalloc(sizeof(struct if_usb_card), GFP_KERNEL);
if (!cardp)
goto error;
setup_timer(&cardp->fw_timeout, if_usb_fw_timeo, (unsigned long)cardp);
init_waitqueue_head(&cardp->fw_wq);
cardp->udev = udev;
iface_desc = intf->cur_altsetting;
for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
endpoint = &iface_desc->endpoint[i].desc;
if (usb_endpoint_is_bulk_in(endpoint)) {
cardp->ep_in_size =
le16_to_cpu(endpoint->wMaxPacketSize);
cardp->ep_in = usb_endpoint_num(endpoint);
} else if (usb_endpoint_is_bulk_out(endpoint)) {
cardp->ep_out_size =
le16_to_cpu(endpoint->wMaxPacketSize);
cardp->ep_out = usb_endpoint_num(endpoint);
}
}
if (!cardp->ep_out_size || !cardp->ep_in_size)
/* Endpoints not found */
goto dealloc;
cardp->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!cardp->rx_urb)
goto dealloc;
cardp->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!cardp->tx_urb)
goto dealloc;
cardp->cmd_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!cardp->cmd_urb)
goto dealloc;
cardp->ep_out_buf = kmalloc(MRVDRV_ETH_TX_PACKET_BUFFER_SIZE,
GFP_KERNEL);
if (!cardp->ep_out_buf)
goto dealloc;
priv = lbtf_add_card(cardp, &udev->dev);
if (!priv)
goto dealloc;
cardp->priv = priv;
priv->hw_host_to_card = if_usb_host_to_card;
priv->hw_prog_firmware = if_usb_prog_firmware;
priv->hw_reset_device = if_usb_reset_device;
cardp->boot2_version = udev->descriptor.bcdDevice;
usb_get_dev(udev);
usb_set_intfdata(intf, cardp);
return 0;
dealloc:
if_usb_free(cardp);
error:
return -ENOMEM;
}
/**
* if_usb_disconnect - free resource and cleanup
*
* @intf USB interface structure
*/
static void if_usb_disconnect(struct usb_interface *intf)
{
struct if_usb_card *cardp = usb_get_intfdata(intf);
struct lbtf_private *priv = (struct lbtf_private *) cardp->priv;
if_usb_reset_device(cardp);
if (priv)
lbtf_remove_card(priv);
/* Unlink and free urb */
if_usb_free(cardp);
usb_set_intfdata(intf, NULL);
usb_put_dev(interface_to_usbdev(intf));
}
/**
* if_usb_send_fw_pkt - This function downloads the FW
*
* @priv pointer to struct lbtf_private
*
* Returns: 0
*/
static int if_usb_send_fw_pkt(struct if_usb_card *cardp)
{
struct fwdata *fwdata = cardp->ep_out_buf;
u8 *firmware = (u8 *) cardp->fw->data;
/* If we got a CRC failure on the last block, back
up and retry it */
if (!cardp->CRC_OK) {
cardp->totalbytes = cardp->fwlastblksent;
cardp->fwseqnum--;
}
/* struct fwdata (which we sent to the card) has an
extra __le32 field in between the header and the data,
which is not in the struct fwheader in the actual
firmware binary. Insert the seqnum in the middle... */
memcpy(&fwdata->hdr, &firmware[cardp->totalbytes],
sizeof(struct fwheader));
cardp->fwlastblksent = cardp->totalbytes;
cardp->totalbytes += sizeof(struct fwheader);
memcpy(fwdata->data, &firmware[cardp->totalbytes],
le32_to_cpu(fwdata->hdr.datalength));
fwdata->seqnum = cpu_to_le32(++cardp->fwseqnum);
cardp->totalbytes += le32_to_cpu(fwdata->hdr.datalength);
usb_tx_block(cardp, cardp->ep_out_buf, sizeof(struct fwdata) +
le32_to_cpu(fwdata->hdr.datalength), 0);
if (fwdata->hdr.dnldcmd == cpu_to_le32(FW_HAS_LAST_BLOCK))
/* Host has finished FW downloading
* Donwloading FW JUMP BLOCK
*/
cardp->fwfinalblk = 1;
return 0;
}
static int if_usb_reset_device(struct if_usb_card *cardp)
{
struct cmd_ds_802_11_reset *cmd = cardp->ep_out_buf + 4;
int ret;
*(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_REQUEST);
cmd->hdr.command = cpu_to_le16(CMD_802_11_RESET);
cmd->hdr.size = cpu_to_le16(sizeof(struct cmd_ds_802_11_reset));
cmd->hdr.result = cpu_to_le16(0);
cmd->hdr.seqnum = cpu_to_le16(0x5a5a);
cmd->action = cpu_to_le16(CMD_ACT_HALT);
usb_tx_block(cardp, cardp->ep_out_buf,
4 + sizeof(struct cmd_ds_802_11_reset), 0);
msleep(100);
ret = usb_reset_device(cardp->udev);
msleep(100);
return ret;
}
EXPORT_SYMBOL_GPL(if_usb_reset_device);
/**
* usb_tx_block - transfer data to the device
*
* @priv pointer to struct lbtf_private
* @payload pointer to payload data
* @nb data length
* @data non-zero for data, zero for commands
*
* Returns: 0 on success, nonzero otherwise.
*/
static int usb_tx_block(struct if_usb_card *cardp, uint8_t *payload,
uint16_t nb, u8 data)
{
struct urb *urb;
/* check if device is removed */
if (cardp->priv->surpriseremoved)
return -1;
if (data)
urb = cardp->tx_urb;
else
urb = cardp->cmd_urb;
usb_fill_bulk_urb(urb, cardp->udev,
usb_sndbulkpipe(cardp->udev,
cardp->ep_out),
payload, nb, if_usb_write_bulk_callback, cardp);
urb->transfer_flags |= URB_ZERO_PACKET;
if (usb_submit_urb(urb, GFP_ATOMIC))
return -1;
return 0;
}
static int __if_usb_submit_rx_urb(struct if_usb_card *cardp,
void (*callbackfn)(struct urb *urb))
{
struct sk_buff *skb;
skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE);
if (!skb)
return -1;
cardp->rx_skb = skb;
/* Fill the receive configuration URB and initialise the Rx call back */
usb_fill_bulk_urb(cardp->rx_urb, cardp->udev,
usb_rcvbulkpipe(cardp->udev, cardp->ep_in),
(void *) (skb->tail),
MRVDRV_ETH_RX_PACKET_BUFFER_SIZE, callbackfn, cardp);
cardp->rx_urb->transfer_flags |= URB_ZERO_PACKET;
if (usb_submit_urb(cardp->rx_urb, GFP_ATOMIC)) {
kfree_skb(skb);
cardp->rx_skb = NULL;
return -1;
} else
return 0;
}
static int if_usb_submit_rx_urb_fwload(struct if_usb_card *cardp)
{
return __if_usb_submit_rx_urb(cardp, &if_usb_receive_fwload);
}
static int if_usb_submit_rx_urb(struct if_usb_card *cardp)
{
return __if_usb_submit_rx_urb(cardp, &if_usb_receive);
}
static void if_usb_receive_fwload(struct urb *urb)
{
struct if_usb_card *cardp = urb->context;
struct sk_buff *skb = cardp->rx_skb;
struct fwsyncheader *syncfwheader;
struct bootcmdresp bcmdresp;
if (urb->status) {
kfree_skb(skb);
return;
}
if (cardp->fwdnldover) {
__le32 *tmp = (__le32 *)(skb->data);
if (tmp[0] == cpu_to_le32(CMD_TYPE_INDICATION) &&
tmp[1] == cpu_to_le32(MACREG_INT_CODE_FIRMWARE_READY))
/* Firmware ready event received */
wake_up(&cardp->fw_wq);
else
if_usb_submit_rx_urb_fwload(cardp);
kfree_skb(skb);
return;
}
if (cardp->bootcmdresp <= 0) {
memcpy(&bcmdresp, skb->data, sizeof(bcmdresp));
if (le16_to_cpu(cardp->udev->descriptor.bcdDevice) < 0x3106) {
kfree_skb(skb);
if_usb_submit_rx_urb_fwload(cardp);
cardp->bootcmdresp = 1;
/* Received valid boot command response */
return;
}
if (bcmdresp.magic != cpu_to_le32(BOOT_CMD_MAGIC_NUMBER)) {
if (bcmdresp.magic == cpu_to_le32(CMD_TYPE_REQUEST) ||
bcmdresp.magic == cpu_to_le32(CMD_TYPE_DATA) ||
bcmdresp.magic == cpu_to_le32(CMD_TYPE_INDICATION))
cardp->bootcmdresp = -1;
} else if (bcmdresp.cmd == BOOT_CMD_FW_BY_USB &&
bcmdresp.result == BOOT_CMD_RESP_OK)
cardp->bootcmdresp = 1;
kfree_skb(skb);
if_usb_submit_rx_urb_fwload(cardp);
return;
}
syncfwheader = kmalloc(sizeof(struct fwsyncheader), GFP_ATOMIC);
if (!syncfwheader) {
kfree_skb(skb);
return;
}
memcpy(syncfwheader, skb->data, sizeof(struct fwsyncheader));
if (!syncfwheader->cmd)
cardp->CRC_OK = 1;
else
cardp->CRC_OK = 0;
kfree_skb(skb);
/* reschedule timer for 200ms hence */
mod_timer(&cardp->fw_timeout, jiffies + (HZ/5));
if (cardp->fwfinalblk) {
cardp->fwdnldover = 1;
goto exit;
}
if_usb_send_fw_pkt(cardp);
exit:
if_usb_submit_rx_urb_fwload(cardp);
kfree(syncfwheader);
return;
}
#define MRVDRV_MIN_PKT_LEN 30
static inline void process_cmdtypedata(int recvlength, struct sk_buff *skb,
struct if_usb_card *cardp,
struct lbtf_private *priv)
{
if (recvlength > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + MESSAGE_HEADER_LEN
|| recvlength < MRVDRV_MIN_PKT_LEN) {
kfree_skb(skb);
return;
}
skb_put(skb, recvlength);
skb_pull(skb, MESSAGE_HEADER_LEN);
lbtf_rx(priv, skb);
}
static inline void process_cmdrequest(int recvlength, uint8_t *recvbuff,
struct sk_buff *skb,
struct if_usb_card *cardp,
struct lbtf_private *priv)
{
if (recvlength > LBS_CMD_BUFFER_SIZE) {
kfree_skb(skb);
return;
}
if (!in_interrupt())
BUG();
spin_lock(&priv->driver_lock);
memcpy(priv->cmd_resp_buff, recvbuff + MESSAGE_HEADER_LEN,
recvlength - MESSAGE_HEADER_LEN);
kfree_skb(skb);
lbtf_cmd_response_rx(priv);
spin_unlock(&priv->driver_lock);
}
/**
* if_usb_receive - read data received from the device.
*
* @urb pointer to struct urb
*/
static void if_usb_receive(struct urb *urb)
{
struct if_usb_card *cardp = urb->context;
struct sk_buff *skb = cardp->rx_skb;
struct lbtf_private *priv = cardp->priv;
int recvlength = urb->actual_length;
uint8_t *recvbuff = NULL;
uint32_t recvtype = 0;
__le32 *pkt = (__le32 *) skb->data;
if (recvlength) {
if (urb->status) {
kfree_skb(skb);
goto setup_for_next;
}
recvbuff = skb->data;
recvtype = le32_to_cpu(pkt[0]);
} else if (urb->status) {
kfree_skb(skb);
return;
}
switch (recvtype) {
case CMD_TYPE_DATA:
process_cmdtypedata(recvlength, skb, cardp, priv);
break;
case CMD_TYPE_REQUEST:
process_cmdrequest(recvlength, recvbuff, skb, cardp, priv);
break;
case CMD_TYPE_INDICATION:
{
/* Event cause handling */
u32 event_cause = le32_to_cpu(pkt[1]);
/* Icky undocumented magic special case */
if (event_cause & 0xffff0000) {
u16 tmp;
u8 retrycnt;
u8 failure;
tmp = event_cause >> 16;
retrycnt = tmp & 0x00ff;
failure = (tmp & 0xff00) >> 8;
lbtf_send_tx_feedback(priv, retrycnt, failure);
} else if (event_cause == LBTF_EVENT_BCN_SENT)
lbtf_bcn_sent(priv);
else
printk(KERN_DEBUG
"Unsupported notification %d received\n",
event_cause);
kfree_skb(skb);
break;
}
default:
printk(KERN_DEBUG "libertastf: unknown command type 0x%X\n",
recvtype);
kfree_skb(skb);
break;
}
setup_for_next:
if_usb_submit_rx_urb(cardp);
}
/**
* if_usb_host_to_card - Download data to the device
*
* @priv pointer to struct lbtf_private structure
* @type type of data
* @buf pointer to data buffer
* @len number of bytes
*
* Returns: 0 on success, nonzero otherwise
*/
static int if_usb_host_to_card(struct lbtf_private *priv, uint8_t type,
uint8_t *payload, uint16_t nb)
{
struct if_usb_card *cardp = priv->card;
u8 data = 0;
if (type == MVMS_CMD) {
*(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_REQUEST);
} else {
*(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_DATA);
data = 1;
}
memcpy((cardp->ep_out_buf + MESSAGE_HEADER_LEN), payload, nb);
return usb_tx_block(cardp, cardp->ep_out_buf, nb + MESSAGE_HEADER_LEN,
data);
}
/**
* if_usb_issue_boot_command - Issue boot command to Boot2.
*
* @ivalue 1 boots from FW by USB-Download, 2 boots from FW in EEPROM.
*
* Returns: 0
*/
static int if_usb_issue_boot_command(struct if_usb_card *cardp, int ivalue)
{
struct bootcmd *bootcmd = cardp->ep_out_buf;
/* Prepare command */
bootcmd->magic = cpu_to_le32(BOOT_CMD_MAGIC_NUMBER);
bootcmd->cmd = ivalue;
memset(bootcmd->pad, 0, sizeof(bootcmd->pad));
/* Issue command */
usb_tx_block(cardp, cardp->ep_out_buf, sizeof(*bootcmd), 0);
return 0;
}
/**
* check_fwfile_format - Check the validity of Boot2/FW image.
*
* @data pointer to image
* @totlen image length
*
* Returns: 0 if the image is valid, nonzero otherwise.
*/
static int check_fwfile_format(const u8 *data, u32 totlen)
{
u32 bincmd, exit;