static int if_sdio_handle_cmd(struct if_sdio_card *card,
u8 *buffer, unsigned size)
{
struct lbs_private *priv = card->priv;
int ret;
unsigned long flags;
u8 i;
lbs_deb_enter(LBS_DEB_SDIO);
if (size > LBS_CMD_BUFFER_SIZE) {
lbs_deb_sdio("response packet too large (%d bytes)\n",
(int)size);
ret = -E2BIG;
goto out;
}
spin_lock_irqsave(&priv->driver_lock, flags);
i = (priv->resp_idx == 0) ? 1 : 0;
BUG_ON(priv->resp_len[i]);
priv->resp_len[i] = size;
memcpy(priv->resp_buf[i], buffer, size);
lbs_notify_command_response(priv, i);
spin_unlock_irqrestore(&card->priv->driver_lock, flags);
ret = 0;
out:
lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
return ret;
}
static irqreturn_t if_cs_interrupt(int irq, void *data)
{
struct if_cs_card *card = data;
struct lbs_private *priv = card->priv;
u16 cause;
lbs_deb_enter(LBS_DEB_CS);
/* Ask card interrupt cause register if there is something for us */
cause = if_cs_read16(card, IF_CS_CARD_INT_CAUSE);
lbs_deb_cs("cause 0x%04x\n", cause);
if (cause == 0) {
/* Not for us */
return IRQ_NONE;
}
if (cause == 0xffff) {
/* Read in junk, the card has probably been removed */
card->priv->surpriseremoved = 1;
return IRQ_HANDLED;
}
if (cause & IF_CS_BIT_RX) {
struct sk_buff *skb;
lbs_deb_cs("rx packet\n");
skb = if_cs_receive_data(priv);
if (skb)
lbs_process_rxed_packet(priv, skb);
}
if (cause & IF_CS_BIT_TX) {
lbs_deb_cs("tx done\n");
lbs_host_to_card_done(priv);
}
if (cause & IF_CS_BIT_RESP) {
unsigned long flags;
u8 i;
lbs_deb_cs("cmd resp\n");
spin_lock_irqsave(&priv->driver_lock, flags);
i = (priv->resp_idx == 0) ? 1 : 0;
spin_unlock_irqrestore(&priv->driver_lock, flags);
BUG_ON(priv->resp_len[i]);
if_cs_receive_cmdres(priv, priv->resp_buf[i],
&priv->resp_len[i]);
spin_lock_irqsave(&priv->driver_lock, flags);
lbs_notify_command_response(priv, i);
spin_unlock_irqrestore(&priv->driver_lock, flags);
}
if (cause & IF_CS_BIT_EVENT) {
u16 status = if_cs_read16(priv->card, IF_CS_CARD_STATUS);
if_cs_write16(priv->card, IF_CS_HOST_INT_CAUSE,
IF_CS_BIT_EVENT);
lbs_queue_event(priv, (status & IF_CS_CARD_STATUS_MASK) >> 8);
}
static inline void process_cmdrequest(int recvlength, uint8_t *recvbuff,
struct sk_buff *skb,
struct if_usb_card *cardp,
struct lbs_private *priv)
{
u8 i;
if (recvlength > LBS_CMD_BUFFER_SIZE) {
lbs_deb_usbd(&cardp->udev->dev,
"The receive buffer is too large\n");
kfree_skb(skb);
return;
}
if (!in_interrupt())
BUG();
spin_lock(&priv->driver_lock);
i = (priv->resp_idx == 0) ? 1 : 0;
BUG_ON(priv->resp_len[i]);
priv->resp_len[i] = (recvlength - MESSAGE_HEADER_LEN);
memcpy(priv->resp_buf[i], recvbuff + MESSAGE_HEADER_LEN,
priv->resp_len[i]);
kfree_skb(skb);
lbs_notify_command_response(priv, i);
spin_unlock(&priv->driver_lock);
lbs_deb_usbd(&cardp->udev->dev,
"Wake up main thread to handle cmd response\n");
}