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Subject[PATCH 2/3] libertas_tf: don't defer firmware loading until start()
Date
In order to be able to get a MAC address before we register the device
with ieee80211 we'll need to load the firmware way earlier.

There seems to be one problem with this: the device seems to start
with radio enabled and starts sending in frames right after the firmware
load finishes. This might be a firmware bug. Disable the radio as soon
as possible.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
---
.../net/wireless/marvell/libertas_tf/if_usb.c | 24 +++++------
.../marvell/libertas_tf/libertas_tf.h | 5 +--
.../net/wireless/marvell/libertas_tf/main.c | 41 +++++++++++--------
3 files changed, 38 insertions(+), 32 deletions(-)

diff --git a/drivers/net/wireless/marvell/libertas_tf/if_usb.c b/drivers/net/wireless/marvell/libertas_tf/if_usb.c
index 7a5a1a85dcf7..a4b9ede70705 100644
--- a/drivers/net/wireless/marvell/libertas_tf/if_usb.c
+++ b/drivers/net/wireless/marvell/libertas_tf/if_usb.c
@@ -42,14 +42,14 @@ 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_prog_firmware(struct lbtf_private *priv);
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);
+static int if_usb_reset_device(struct lbtf_private *priv);

/**
* if_usb_wrike_bulk_callback - call back to handle URB status
@@ -222,13 +222,11 @@ static int if_usb_probe(struct usb_interface *intf,
goto dealloc;
}

+ cardp->boot2_version = udev->descriptor.bcdDevice;
priv = lbtf_add_card(cardp, &udev->dev, &if_usb_ops);
if (!priv)
goto dealloc;

- cardp->priv = priv;
- cardp->boot2_version = udev->descriptor.bcdDevice;
-
usb_get_dev(udev);
usb_set_intfdata(intf, cardp);

@@ -253,7 +251,7 @@ static void if_usb_disconnect(struct usb_interface *intf)

lbtf_deb_enter(LBTF_DEB_MAIN);

- if_usb_reset_device(cardp);
+ if_usb_reset_device(priv);

if (priv)
lbtf_remove_card(priv);
@@ -336,8 +334,9 @@ static int if_usb_send_fw_pkt(struct if_usb_card *cardp)
return 0;
}

-static int if_usb_reset_device(struct if_usb_card *cardp)
+static int if_usb_reset_device(struct lbtf_private *priv)
{
+ struct if_usb_card *cardp = priv->card;
struct cmd_ds_802_11_reset *cmd = cardp->ep_out_buf + 4;
int ret;

@@ -808,14 +807,17 @@ static int check_fwfile_format(const u8 *data, u32 totlen)
}


-static int if_usb_prog_firmware(struct if_usb_card *cardp)
+static int if_usb_prog_firmware(struct lbtf_private *priv)
{
+ struct if_usb_card *cardp = priv->card;
int i = 0;
static int reset_count = 10;
int ret = 0;

lbtf_deb_enter(LBTF_DEB_USB);

+ cardp->priv = priv;
+
kernel_param_lock(THIS_MODULE);
ret = request_firmware(&cardp->fw, lbtf_fw_name, &cardp->udev->dev);
if (ret < 0) {
@@ -851,7 +853,7 @@ static int if_usb_prog_firmware(struct if_usb_card *cardp)

if (cardp->bootcmdresp <= 0) {
if (--reset_count >= 0) {
- if_usb_reset_device(cardp);
+ if_usb_reset_device(priv);
goto restart;
}
return -1;
@@ -880,7 +882,7 @@ static int if_usb_prog_firmware(struct if_usb_card *cardp)
if (!cardp->fwdnldover) {
pr_info("failed to load fw, resetting device!\n");
if (--reset_count >= 0) {
- if_usb_reset_device(cardp);
+ if_usb_reset_device(priv);
goto restart;
}

@@ -889,8 +891,6 @@ static int if_usb_prog_firmware(struct if_usb_card *cardp)
goto release_fw;
}

- cardp->priv->fw_ready = 1;
-
release_fw:
release_firmware(cardp->fw);
cardp->fw = NULL;
diff --git a/drivers/net/wireless/marvell/libertas_tf/libertas_tf.h b/drivers/net/wireless/marvell/libertas_tf/libertas_tf.h
index 11d5ff68bc5e..3ed1fbe28798 100644
--- a/drivers/net/wireless/marvell/libertas_tf/libertas_tf.h
+++ b/drivers/net/wireless/marvell/libertas_tf/libertas_tf.h
@@ -177,8 +177,8 @@ struct lbtf_ops {
/** Hardware access */
int (*hw_host_to_card)(struct lbtf_private *priv, u8 type,
u8 *payload, u16 nb);
- int (*hw_prog_firmware)(struct if_usb_card *cardp);
- int (*hw_reset_device)(struct if_usb_card *cardp);
+ int (*hw_prog_firmware)(struct lbtf_private *priv);
+ int (*hw_reset_device)(struct lbtf_private *priv);
};

/** Private structure for the MV device */
@@ -254,7 +254,6 @@ struct lbtf_private {
struct ieee80211_supported_band band;
struct lbtf_offset_value offsetvalue;

- u8 fw_ready;
u8 surpriseremoved;
struct sk_buff_head bc_ps_buf;

diff --git a/drivers/net/wireless/marvell/libertas_tf/main.c b/drivers/net/wireless/marvell/libertas_tf/main.c
index 8ed3cd158cf5..b4bd3047eb4e 100644
--- a/drivers/net/wireless/marvell/libertas_tf/main.c
+++ b/drivers/net/wireless/marvell/libertas_tf/main.c
@@ -118,11 +118,6 @@ static void lbtf_cmd_work(struct work_struct *work)
priv->cmd_timed_out = 0;
spin_unlock_irq(&priv->driver_lock);

- if (!priv->fw_ready) {
- lbtf_deb_leave_args(LBTF_DEB_CMD, "fw not ready");
- return;
- }
-
/* Execute the next command */
if (!priv->cur_cmd)
lbtf_execute_next_command(priv);
@@ -294,36 +289,29 @@ static void lbtf_tx_work(struct work_struct *work)
static int lbtf_op_start(struct ieee80211_hw *hw)
{
struct lbtf_private *priv = hw->priv;
- void *card = priv->card;
int ret = -1;

lbtf_deb_enter(LBTF_DEB_MACOPS);

- if (!priv->fw_ready)
- /* Upload firmware */
- if (priv->ops->hw_prog_firmware(card))
- goto err_prog_firmware;
-
/* poke the firmware */
priv->capability = WLAN_CAPABILITY_SHORT_PREAMBLE;
priv->radioon = RADIO_ON;
priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
ret = lbtf_setup_firmware(priv);
if (ret)
- goto err_prog_firmware;
+ goto err_setup_firmware;

if ((priv->fwrelease < LBTF_FW_VER_MIN) ||
(priv->fwrelease > LBTF_FW_VER_MAX)) {
ret = -1;
- goto err_prog_firmware;
+ goto err_setup_firmware;
}

lbtf_deb_leave(LBTF_DEB_MACOPS);
return 0;

-err_prog_firmware:
- priv->ops->hw_reset_device(card);
- lbtf_deb_leave_args(LBTF_DEB_MACOPS, "error programming fw; ret=%d", ret);
+err_setup_firmware:
+ lbtf_deb_leave_args(LBTF_DEB_MACOPS, "fw setup error; ret=%d", ret);
return ret;
}

@@ -555,6 +543,11 @@ int lbtf_rx(struct lbtf_private *priv, struct sk_buff *skb)

lbtf_deb_enter(LBTF_DEB_RX);

+ if (priv->radioon != RADIO_ON) {
+ lbtf_deb_rx("rx before we turned on the radio");
+ goto done;
+ }
+
prxpd = (struct rxpd *) skb->data;

memset(&stats, 0, sizeof(stats));
@@ -593,13 +586,14 @@ int lbtf_rx(struct lbtf_private *priv, struct sk_buff *skb)

ieee80211_rx_irqsafe(priv->hw, skb);

+done:
lbtf_deb_leave(LBTF_DEB_RX);
return 0;
}
EXPORT_SYMBOL_GPL(lbtf_rx);

/**
- * lbtf_add_card: Add and initialize the card, no fw upload yet.
+ * lbtf_add_card: Add and initialize the card.
*
* @card A pointer to card
*
@@ -648,6 +642,19 @@ struct lbtf_private *lbtf_add_card(void *card, struct device *dmdev,

INIT_WORK(&priv->cmd_work, lbtf_cmd_work);
INIT_WORK(&priv->tx_work, lbtf_tx_work);
+
+ if (priv->ops->hw_prog_firmware(priv)) {
+ lbtf_deb_usbd(&udev->dev, "Error programming the firmware\n");
+ priv->ops->hw_reset_device(priv);
+ goto err_init_adapter;
+ }
+
+ /* The firmware seems to start with the radio enabled. Turn it
+ * off before an actual mac80211 start callback is invoked.
+ */
+ priv->radioon = RADIO_OFF;
+ lbtf_set_radio_control(priv);
+
if (ieee80211_register_hw(hw))
goto err_init_adapter;

--
2.20.1
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