Hi Johan,
* Johan Hedberg <johan.hedberg@xxxxxxxxx> [2012-06-27 14:26:04 +0300]:
> From: Johan Hedberg <johan.hedberg@xxxxxxxxx>
>
> This patch adds tracking for the uninitialized, initialized and active
> states for Three-wire UART. This is needed so we can handle periodic
> sending of the Link Establishment messages before reaching active state
> and so that we do not try to do any higher level HCI data transmission
> before reaching active state.
>
> Signed-off-by: Johan Hedberg <johan.hedberg@xxxxxxxxx>
> ---
> drivers/bluetooth/hci_h5.c | 70 ++++++++++++++++++++++++++++++++------------
> 1 file changed, 52 insertions(+), 18 deletions(-)
>
> diff --git a/drivers/bluetooth/hci_h5.c b/drivers/bluetooth/hci_h5.c
> index d26f801..1e83118 100644
> --- a/drivers/bluetooth/hci_h5.c
> +++ b/drivers/bluetooth/hci_h5.c
> @@ -72,18 +72,53 @@ struct h5 {
> u8 tx_seq; /* Next seq number to send */
> u8 tx_ack; /* Next ack number to send */
>
> + enum {
> + H5_UNINITIALIZED,
> + H5_INITIALIZED,
> + H5_ACTIVE,
> + } state;
> +
> bool sleeping;
> };
>
> static void h5_reset_rx(struct h5 *h5);
>
> +static void h5_link_control(struct hci_uart *hu, const void *data, size_t len)
> +{
> + struct h5 *h5 = hu->priv;
> + struct sk_buff *nskb;
> +
> + nskb = alloc_skb(3, GFP_ATOMIC);
> + if (!nskb)
> + return;
> +
> + bt_cb(nskb)->pkt_type = HCI_3WIRE_LINK_PKT;
> +
> + memcpy(skb_put(nskb, len), data, len);
> +
> + skb_queue_tail(&h5->unrel, nskb);
> +}
> +
> static void h5_timed_event(unsigned long arg)
> {
> + const unsigned char sync_req[] = { 0x01, 0x7e };
> + const unsigned char conf_req[] = { 0x03, 0xfc, 0x01 };
> struct hci_uart *hu = (struct hci_uart *) arg;
> struct h5 *h5 = hu->priv;
> struct sk_buff *skb;
> unsigned long flags;
>
> + if (h5->state == H5_UNINITIALIZED)
> + h5_link_control(hu, sync_req, sizeof(sync_req));
> +
> + if (h5->state == H5_INITIALIZED)
> + h5_link_control(hu, conf_req, sizeof(conf_req));
> +
> + if (h5->state != H5_ACTIVE) {
> + mod_timer(&h5->timer, jiffies + HZ / 10);
> + goto wakeup;
Another HZ usage.
Gustavo
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