[PATCH v2] libertas: Add auto deep sleep support for SD8385/SD8686/SD8688
Dan Williams
dcbw at redhat.com
Thu Oct 1 14:27:21 EDT 2009
On Wed, 2009-09-30 at 20:04 -0700, Bing Zhao wrote:
> From: Amitkumar Karwar <akarwar at marvell.com>
>
> Add timer based auto deep sleep feature in libertas driver which can be
> configured using iwconfig command. This is tested on SD8688, SD8686 cards
> with firmware versions 10.38.1.p25, 9.70.4.p0 respectively on 32-bit and 64-bit
> platforms. Tests have been done for USB/CS cards to make sure that the patch
> won't break USB/CS code. We didn't test the if_spi driver.
>
> Signed-off-by: Amitkumar Karwar <akarwar at marvell.com>
> Signed-off-by: Bing Zhao <bzhao at marvell.com>
Acked-by: Dan Williams <dcbw at redhat.com>
Though I wonder if we could just put the lbs_is_cmd_allowed() check into
the actual command handling routines instead of sprinkling it around.
We did move away from the 'one-huge-switch' command submission model,
which makes it a bit harder to gate commands based on device state, but
I can't think of anything off the top of my head that would hurt by
doing it like that.
i.e. would putting the check in both __lbs_cmd_async() and
lbs_prepare_and_send_command() around where the priv->surprise_removed
check is work too?
Dan
> ---
> drivers/net/wireless/libertas/README | 26 ++++-
> drivers/net/wireless/libertas/cmd.c | 72 ++++++++++++-
> drivers/net/wireless/libertas/cmdresp.c | 12 ++
> drivers/net/wireless/libertas/debugfs.c | 46 ++++++++
> drivers/net/wireless/libertas/decl.h | 4 +
> drivers/net/wireless/libertas/dev.h | 18 +++
> drivers/net/wireless/libertas/host.h | 1 +
> drivers/net/wireless/libertas/if_cs.c | 3 +
> drivers/net/wireless/libertas/if_sdio.c | 56 +++++++++
> drivers/net/wireless/libertas/if_sdio.h | 3 +-
> drivers/net/wireless/libertas/if_spi.c | 3 +
> drivers/net/wireless/libertas/if_usb.c | 3 +
> drivers/net/wireless/libertas/main.c | 111 ++++++++++++++++---
> drivers/net/wireless/libertas/scan.c | 11 ++
> drivers/net/wireless/libertas/wext.c | 185 ++++++++++++++++++++++++++++++-
> 15 files changed, 533 insertions(+), 21 deletions(-)
>
> diff --git a/drivers/net/wireless/libertas/README b/drivers/net/wireless/libertas/README
> index ab6a2d5..635002d 100644
> --- a/drivers/net/wireless/libertas/README
> +++ b/drivers/net/wireless/libertas/README
> @@ -1,5 +1,5 @@
> ================================================================================
> - README for USB8388
> + README for Libertas
>
> (c) Copyright © 2003-2006, Marvell International Ltd.
> All Rights Reserved
> @@ -226,4 +226,28 @@ setuserscan
> All entries in the scan table (not just the new scan data when keep=1)
> will be displayed upon completion by use of the getscantable ioctl.
>
> +========================
> +IWCONFIG COMMANDS
> +========================
> +power period
> +
> + This command is used to configure the station in deep sleep mode /
> + auto deep sleep mode.
> +
> + The timer is implemented to monitor the activities (command, event,
> + etc.). When an activity is detected station will exit from deep
> + sleep mode automatically and restart the timer. At timer expiry
> + (no activity for defined time period) the deep sleep mode is entered
> + automatically.
> +
> + Note: this command is for SDIO interface only.
> +
> + Usage:
> + To enable deep sleep mode do:
> + iwconfig wlan0 power period 0
> + To enable auto deep sleep mode with idle time period 5 seconds do:
> + iwconfig wlan0 power period 5
> + To disable deep sleep/auto deep sleep mode do:
> + iwconfig wlan0 power period -1
> +
> ==============================================================================
> diff --git a/drivers/net/wireless/libertas/cmd.c b/drivers/net/wireless/libertas/cmd.c
> index 6850981..3a3e894 100644
> --- a/drivers/net/wireless/libertas/cmd.c
> +++ b/drivers/net/wireless/libertas/cmd.c
> @@ -17,7 +17,6 @@
>
> static struct cmd_ctrl_node *lbs_get_cmd_ctrl_node(struct lbs_private *priv);
>
> -
> /**
> * @brief Simple callback that copies response back into command
> *
> @@ -319,6 +318,60 @@ int lbs_cmd_802_11_sleep_params(struct lbs_private *priv, uint16_t cmd_action,
> return 0;
> }
>
> +static int lbs_wait_for_ds_awake(struct lbs_private *priv)
> +{
> + int ret = 0;
> +
> + lbs_deb_enter(LBS_DEB_CMD);
> +
> + if (priv->is_deep_sleep) {
> + if (!wait_event_interruptible_timeout(priv->ds_awake_q,
> + !priv->is_deep_sleep, (10 * HZ))) {
> + lbs_pr_err("ds_awake_q: timer expired\n");
> + ret = -1;
> + }
> + }
> +
> + lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
> + return ret;
> +}
> +
> +int lbs_set_deep_sleep(struct lbs_private *priv, int deep_sleep)
> +{
> + int ret = 0;
> +
> + lbs_deb_enter(LBS_DEB_CMD);
> +
> + if (deep_sleep) {
> + if (priv->is_deep_sleep != 1) {
> + lbs_deb_cmd("deep sleep: sleep\n");
> + BUG_ON(!priv->enter_deep_sleep);
> + ret = priv->enter_deep_sleep(priv);
> + if (!ret) {
> + netif_stop_queue(priv->dev);
> + netif_carrier_off(priv->dev);
> + }
> + } else {
> + lbs_pr_err("deep sleep: already enabled\n");
> + }
> + } else {
> + if (priv->is_deep_sleep) {
> + lbs_deb_cmd("deep sleep: wakeup\n");
> + BUG_ON(!priv->exit_deep_sleep);
> + ret = priv->exit_deep_sleep(priv);
> + if (!ret) {
> + ret = lbs_wait_for_ds_awake(priv);
> + if (ret)
> + lbs_pr_err("deep sleep: wakeup"
> + "failed\n");
> + }
> + }
> + }
> +
> + lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
> + return ret;
> +}
> +
> int lbs_cmd_802_11_set_wep(struct lbs_private *priv, uint16_t cmd_action,
> struct assoc_request *assoc)
> {
> @@ -1242,8 +1295,17 @@ static void lbs_submit_command(struct lbs_private *priv,
> timeo = HZ/4;
> }
>
> - /* Setup the timer after transmit command */
> - mod_timer(&priv->command_timer, jiffies + timeo);
> + if (command == CMD_802_11_DEEP_SLEEP) {
> + if (priv->is_auto_deep_sleep_enabled) {
> + priv->wakeup_dev_required = 1;
> + priv->dnld_sent = 0;
> + }
> + priv->is_deep_sleep = 1;
> + lbs_complete_command(priv, cmdnode, 0);
> + } else {
> + /* Setup the timer after transmit command */
> + mod_timer(&priv->command_timer, jiffies + timeo);
> + }
>
> lbs_deb_leave(LBS_DEB_HOST);
> }
> @@ -1505,6 +1567,10 @@ int lbs_prepare_and_send_command(struct lbs_private *priv,
> case CMD_802_11_BEACON_CTRL:
> ret = lbs_cmd_bcn_ctrl(priv, cmdptr, cmd_action);
> break;
> + case CMD_802_11_DEEP_SLEEP:
> + cmdptr->command = cpu_to_le16(CMD_802_11_DEEP_SLEEP);
> + cmdptr->size = cpu_to_le16(S_DS_GEN);
> + break;
> default:
> lbs_pr_err("PREP_CMD: unknown command 0x%04x\n", cmd_no);
> ret = -1;
> diff --git a/drivers/net/wireless/libertas/cmdresp.c b/drivers/net/wireless/libertas/cmdresp.c
> index c42d3fa..47d2b19 100644
> --- a/drivers/net/wireless/libertas/cmdresp.c
> +++ b/drivers/net/wireless/libertas/cmdresp.c
> @@ -504,9 +504,21 @@ int lbs_process_event(struct lbs_private *priv, u32 event)
>
> case MACREG_INT_CODE_HOST_AWAKE:
> lbs_deb_cmd("EVENT: host awake\n");
> + if (priv->reset_deep_sleep_wakeup)
> + priv->reset_deep_sleep_wakeup(priv);
> + priv->is_deep_sleep = 0;
> lbs_send_confirmwake(priv);
> break;
>
> + case MACREG_INT_CODE_DEEP_SLEEP_AWAKE:
> + if (priv->reset_deep_sleep_wakeup)
> + priv->reset_deep_sleep_wakeup(priv);
> + lbs_deb_cmd("EVENT: ds awake\n");
> + priv->is_deep_sleep = 0;
> + priv->wakeup_dev_required = 0;
> + wake_up_interruptible(&priv->ds_awake_q);
> + break;
> +
> case MACREG_INT_CODE_PS_AWAKE:
> lbs_deb_cmd("EVENT: ps awake\n");
> /* handle unexpected PS AWAKE event */
> diff --git a/drivers/net/wireless/libertas/debugfs.c b/drivers/net/wireless/libertas/debugfs.c
> index 893a55c..8a7e931 100644
> --- a/drivers/net/wireless/libertas/debugfs.c
> +++ b/drivers/net/wireless/libertas/debugfs.c
> @@ -117,6 +117,11 @@ static ssize_t lbs_sleepparams_write(struct file *file,
> if (!buf)
> return -ENOMEM;
>
> + if (!lbs_is_cmd_allowed(priv)) {
> + ret = -EBUSY;
> + goto out_unlock;
> + }
> +
> buf_size = min(count, len - 1);
> if (copy_from_user(buf, user_buf, buf_size)) {
> ret = -EFAULT;
> @@ -157,6 +162,11 @@ static ssize_t lbs_sleepparams_read(struct file *file, char __user *userbuf,
> if (!buf)
> return -ENOMEM;
>
> + if (!lbs_is_cmd_allowed(priv)) {
> + ret = -EBUSY;
> + goto out_unlock;
> + }
> +
> ret = lbs_cmd_802_11_sleep_params(priv, CMD_ACT_GET, &sp);
> if (ret)
> goto out_unlock;
> @@ -223,6 +233,9 @@ static ssize_t lbs_threshold_read(uint16_t tlv_type, uint16_t event_mask,
> u8 freq;
> int events = 0;
>
> + if (!lbs_is_cmd_allowed(priv))
> + return -EBUSY;
> +
> buf = (char *)get_zeroed_page(GFP_KERNEL);
> if (!buf)
> return -ENOMEM;
> @@ -275,6 +288,9 @@ static ssize_t lbs_threshold_write(uint16_t tlv_type, uint16_t event_mask,
> char *buf;
> int ret;
>
> + if (!lbs_is_cmd_allowed(priv))
> + return -EBUSY;
> +
> buf = (char *)get_zeroed_page(GFP_KERNEL);
> if (!buf)
> return -ENOMEM;
> @@ -444,6 +460,11 @@ static ssize_t lbs_rdmac_read(struct file *file, char __user *userbuf,
> if (!buf)
> return -ENOMEM;
>
> + if (!lbs_is_cmd_allowed(priv)) {
> + free_page(addr);
> + return -EBUSY;
> + }
> +
> offval.offset = priv->mac_offset;
> offval.value = 0;
>
> @@ -496,6 +517,11 @@ static ssize_t lbs_wrmac_write(struct file *file,
> if (!buf)
> return -ENOMEM;
>
> + if (!lbs_is_cmd_allowed(priv)) {
> + res = -EBUSY;
> + goto out_unlock;
> + }
> +
> buf_size = min(count, len - 1);
> if (copy_from_user(buf, userbuf, buf_size)) {
> res = -EFAULT;
> @@ -532,6 +558,11 @@ static ssize_t lbs_rdbbp_read(struct file *file, char __user *userbuf,
> if (!buf)
> return -ENOMEM;
>
> + if (!lbs_is_cmd_allowed(priv)) {
> + free_page(addr);
> + return -EBUSY;
> + }
> +
> offval.offset = priv->bbp_offset;
> offval.value = 0;
>
> @@ -585,6 +616,11 @@ static ssize_t lbs_wrbbp_write(struct file *file,
> if (!buf)
> return -ENOMEM;
>
> + if (!lbs_is_cmd_allowed(priv)) {
> + res = -EBUSY;
> + goto out_unlock;
> + }
> +
> buf_size = min(count, len - 1);
> if (copy_from_user(buf, userbuf, buf_size)) {
> res = -EFAULT;
> @@ -621,6 +657,11 @@ static ssize_t lbs_rdrf_read(struct file *file, char __user *userbuf,
> if (!buf)
> return -ENOMEM;
>
> + if (!lbs_is_cmd_allowed(priv)) {
> + free_page(addr);
> + return -EBUSY;
> + }
> +
> offval.offset = priv->rf_offset;
> offval.value = 0;
>
> @@ -674,6 +715,11 @@ static ssize_t lbs_wrrf_write(struct file *file,
> if (!buf)
> return -ENOMEM;
>
> + if (!lbs_is_cmd_allowed(priv)) {
> + res = -EBUSY;
> + goto out_unlock;
> + }
> +
> buf_size = min(count, len - 1);
> if (copy_from_user(buf, userbuf, buf_size)) {
> res = -EFAULT;
> diff --git a/drivers/net/wireless/libertas/decl.h b/drivers/net/wireless/libertas/decl.h
> index 0b84bdc..34b475f 100644
> --- a/drivers/net/wireless/libertas/decl.h
> +++ b/drivers/net/wireless/libertas/decl.h
> @@ -33,6 +33,10 @@ int lbs_execute_next_command(struct lbs_private *priv);
> int lbs_process_event(struct lbs_private *priv, u32 event);
> void lbs_queue_event(struct lbs_private *priv, u32 event);
> void lbs_notify_command_response(struct lbs_private *priv, u8 resp_idx);
> +int lbs_set_deep_sleep(struct lbs_private *priv, int deep_sleep);
> +int lbs_is_cmd_allowed(struct lbs_private *priv);
> +int lbs_enter_auto_deep_sleep(struct lbs_private *priv);
> +int lbs_exit_auto_deep_sleep(struct lbs_private *priv);
>
> u32 lbs_fw_index_to_data_rate(u8 index);
> u8 lbs_data_rate_to_fw_index(u32 rate);
> diff --git a/drivers/net/wireless/libertas/dev.h b/drivers/net/wireless/libertas/dev.h
> index 578c697..e2b4ef2 100644
> --- a/drivers/net/wireless/libertas/dev.h
> +++ b/drivers/net/wireless/libertas/dev.h
> @@ -129,6 +129,20 @@ struct lbs_private {
> u32 bbp_offset;
> u32 rf_offset;
>
> + /** Deep sleep flag */
> + int is_deep_sleep;
> + /** Auto deep sleep enabled flag */
> + int is_auto_deep_sleep_enabled;
> + /** Device wakeup required flag */
> + int wakeup_dev_required;
> + /** Auto deep sleep flag*/
> + int is_activity_detected;
> + /** Auto deep sleep timeout (in miliseconds) */
> + int auto_deep_sleep_timeout;
> +
> + /** Deep sleep wait queue */
> + wait_queue_head_t ds_awake_q;
> +
> /* Download sent:
> bit0 1/0=data_sent/data_tx_done,
> bit1 1/0=cmd_sent/cmd_tx_done,
> @@ -154,6 +168,9 @@ struct lbs_private {
> /** Hardware access */
> int (*hw_host_to_card) (struct lbs_private *priv, u8 type, u8 *payload, u16 nb);
> void (*reset_card) (struct lbs_private *priv);
> + int (*enter_deep_sleep) (struct lbs_private *priv);
> + int (*exit_deep_sleep) (struct lbs_private *priv);
> + int (*reset_deep_sleep_wakeup) (struct lbs_private *priv);
>
> /* Wake On LAN */
> uint32_t wol_criteria;
> @@ -204,6 +221,7 @@ struct lbs_private {
>
> /** Timers */
> struct timer_list command_timer;
> + struct timer_list auto_deepsleep_timer;
> int nr_retries;
> int cmd_timed_out;
>
> diff --git a/drivers/net/wireless/libertas/host.h b/drivers/net/wireless/libertas/host.h
> index fe8f0cb..c055daa 100644
> --- a/drivers/net/wireless/libertas/host.h
> +++ b/drivers/net/wireless/libertas/host.h
> @@ -57,6 +57,7 @@
> #define CMD_802_11_ENABLE_RSN 0x002f
> #define CMD_802_11_SET_AFC 0x003c
> #define CMD_802_11_GET_AFC 0x003d
> +#define CMD_802_11_DEEP_SLEEP 0x003e
> #define CMD_802_11_AD_HOC_STOP 0x0040
> #define CMD_802_11_HOST_SLEEP_CFG 0x0043
> #define CMD_802_11_WAKEUP_CONFIRM 0x0044
> diff --git a/drivers/net/wireless/libertas/if_cs.c b/drivers/net/wireless/libertas/if_cs.c
> index 6238176..465742f 100644
> --- a/drivers/net/wireless/libertas/if_cs.c
> +++ b/drivers/net/wireless/libertas/if_cs.c
> @@ -946,6 +946,9 @@ static int if_cs_probe(struct pcmcia_device *p_dev)
> card->priv = priv;
> priv->card = card;
> priv->hw_host_to_card = if_cs_host_to_card;
> + priv->enter_deep_sleep = NULL;
> + priv->exit_deep_sleep = NULL;
> + priv->reset_deep_sleep_wakeup = NULL;
> priv->fw_ready = 1;
>
> /* Now actually get the IRQ */
> diff --git a/drivers/net/wireless/libertas/if_sdio.c b/drivers/net/wireless/libertas/if_sdio.c
> index 485a8d4..9716728 100644
> --- a/drivers/net/wireless/libertas/if_sdio.c
> +++ b/drivers/net/wireless/libertas/if_sdio.c
> @@ -831,6 +831,58 @@ out:
> return ret;
> }
>
> +static int if_sdio_enter_deep_sleep(struct lbs_private *priv)
> +{
> + int ret = -1;
> + struct cmd_header cmd;
> +
> + memset(&cmd, 0, sizeof(cmd));
> +
> + lbs_deb_sdio("send DEEP_SLEEP command\n");
> + ret = __lbs_cmd(priv, CMD_802_11_DEEP_SLEEP, &cmd, sizeof(cmd),
> + lbs_cmd_copyback, (unsigned long) &cmd);
> + if (ret)
> + lbs_pr_err("DEEP_SLEEP cmd failed\n");
> +
> + mdelay(200);
> + return ret;
> +}
> +
> +static int if_sdio_exit_deep_sleep(struct lbs_private *priv)
> +{
> + struct if_sdio_card *card = priv->card;
> + int ret = -1;
> +
> + lbs_deb_enter(LBS_DEB_SDIO);
> + sdio_claim_host(card->func);
> +
> + sdio_writeb(card->func, HOST_POWER_UP, CONFIGURATION_REG, &ret);
> + if (ret)
> + lbs_pr_err("sdio_writeb failed!\n");
> +
> + sdio_release_host(card->func);
> + lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
> + return ret;
> +}
> +
> +static int if_sdio_reset_deep_sleep_wakeup(struct lbs_private *priv)
> +{
> + struct if_sdio_card *card = priv->card;
> + int ret = -1;
> +
> + lbs_deb_enter(LBS_DEB_SDIO);
> + sdio_claim_host(card->func);
> +
> + sdio_writeb(card->func, 0, CONFIGURATION_REG, &ret);
> + if (ret)
> + lbs_pr_err("sdio_writeb failed!\n");
> +
> + sdio_release_host(card->func);
> + lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
> + return ret;
> +
> +}
> +
> /*******************************************************************/
> /* SDIO callbacks */
> /*******************************************************************/
> @@ -859,6 +911,7 @@ static void if_sdio_interrupt(struct sdio_func *func)
> * Ignore the define name, this really means the card has
> * successfully received the command.
> */
> + card->priv->is_activity_detected = 1;
> if (cause & IF_SDIO_H_INT_DNLD)
> lbs_host_to_card_done(card->priv);
>
> @@ -998,6 +1051,9 @@ static int if_sdio_probe(struct sdio_func *func,
>
> priv->card = card;
> priv->hw_host_to_card = if_sdio_host_to_card;
> + priv->enter_deep_sleep = if_sdio_enter_deep_sleep;
> + priv->exit_deep_sleep = if_sdio_exit_deep_sleep;
> + priv->reset_deep_sleep_wakeup = if_sdio_reset_deep_sleep_wakeup;
>
> priv->fw_ready = 1;
>
> diff --git a/drivers/net/wireless/libertas/if_sdio.h b/drivers/net/wireless/libertas/if_sdio.h
> index 60c9b2f..12179c1 100644
> --- a/drivers/net/wireless/libertas/if_sdio.h
> +++ b/drivers/net/wireless/libertas/if_sdio.h
> @@ -51,5 +51,6 @@
> #define IF_SDIO_EVENT 0x80fc
>
> #define IF_SDIO_BLOCK_SIZE 256
> -
> +#define CONFIGURATION_REG 0x03
> +#define HOST_POWER_UP (0x1U << 1)
> #endif
> diff --git a/drivers/net/wireless/libertas/if_spi.c b/drivers/net/wireless/libertas/if_spi.c
> index 446e327..e2fa657 100644
> --- a/drivers/net/wireless/libertas/if_spi.c
> +++ b/drivers/net/wireless/libertas/if_spi.c
> @@ -1117,6 +1117,9 @@ static int __devinit if_spi_probe(struct spi_device *spi)
> card->priv = priv;
> priv->card = card;
> priv->hw_host_to_card = if_spi_host_to_card;
> + priv->enter_deep_sleep = NULL;
> + priv->exit_deep_sleep = NULL;
> + priv->reset_deep_sleep_wakeup = NULL;
> priv->fw_ready = 1;
>
> /* Initialize interrupt handling stuff. */
> diff --git a/drivers/net/wireless/libertas/if_usb.c b/drivers/net/wireless/libertas/if_usb.c
> index 92bc8c5..a8262de 100644
> --- a/drivers/net/wireless/libertas/if_usb.c
> +++ b/drivers/net/wireless/libertas/if_usb.c
> @@ -300,6 +300,9 @@ static int if_usb_probe(struct usb_interface *intf,
> cardp->priv->fw_ready = 1;
>
> priv->hw_host_to_card = if_usb_host_to_card;
> + priv->enter_deep_sleep = NULL;
> + priv->exit_deep_sleep = NULL;
> + priv->reset_deep_sleep_wakeup = NULL;
> #ifdef CONFIG_OLPC
> if (machine_is_olpc())
> priv->reset_card = if_usb_reset_olpc_card;
> diff --git a/drivers/net/wireless/libertas/main.c b/drivers/net/wireless/libertas/main.c
> index 8df1cfd..3b14fcc 100644
> --- a/drivers/net/wireless/libertas/main.c
> +++ b/drivers/net/wireless/libertas/main.c
> @@ -574,8 +574,10 @@ void lbs_host_to_card_done(struct lbs_private *priv)
> priv->dnld_sent = DNLD_RES_RECEIVED;
>
> /* Wake main thread if commands are pending */
> - if (!priv->cur_cmd || priv->tx_pending_len > 0)
> - wake_up_interruptible(&priv->waitq);
> + if (!priv->cur_cmd || priv->tx_pending_len > 0) {
> + if (!priv->wakeup_dev_required)
> + wake_up_interruptible(&priv->waitq);
> + }
>
> spin_unlock_irqrestore(&priv->driver_lock, flags);
> lbs_deb_leave(LBS_DEB_THREAD);
> @@ -770,7 +772,8 @@ static int lbs_thread(void *data)
> shouldsleep = 0; /* We have a command response */
> else if (priv->cur_cmd)
> shouldsleep = 1; /* Can't send a command; one already running */
> - else if (!list_empty(&priv->cmdpendingq))
> + else if (!list_empty(&priv->cmdpendingq) &&
> + !(priv->wakeup_dev_required))
> shouldsleep = 0; /* We have a command to send */
> else if (__kfifo_len(priv->event_fifo))
> shouldsleep = 0; /* We have an event to process */
> @@ -822,6 +825,26 @@ static int lbs_thread(void *data)
> }
> spin_unlock_irq(&priv->driver_lock);
>
> + /* Process hardware events, e.g. card removed, link lost */
> + spin_lock_irq(&priv->driver_lock);
> + while (__kfifo_len(priv->event_fifo)) {
> + u32 event;
> + __kfifo_get(priv->event_fifo, (unsigned char *) &event,
> + sizeof(event));
> + spin_unlock_irq(&priv->driver_lock);
> + lbs_process_event(priv, event);
> + spin_lock_irq(&priv->driver_lock);
> + }
> + spin_unlock_irq(&priv->driver_lock);
> +
> + if (priv->wakeup_dev_required) {
> + lbs_deb_thread("Waking up device...\n");
> + /* Wake up device */
> + if (priv->exit_deep_sleep(priv))
> + lbs_deb_thread("Wakeup device failed\n");
> + continue;
> + }
> +
> /* command timeout stuff */
> if (priv->cmd_timed_out && priv->cur_cmd) {
> struct cmd_ctrl_node *cmdnode = priv->cur_cmd;
> @@ -849,18 +872,7 @@ static int lbs_thread(void *data)
> }
> priv->cmd_timed_out = 0;
>
> - /* Process hardware events, e.g. card removed, link lost */
> - spin_lock_irq(&priv->driver_lock);
> - while (__kfifo_len(priv->event_fifo)) {
> - u32 event;
>
> - __kfifo_get(priv->event_fifo, (unsigned char *) &event,
> - sizeof(event));
> - spin_unlock_irq(&priv->driver_lock);
> - lbs_process_event(priv, event);
> - spin_lock_irq(&priv->driver_lock);
> - }
> - spin_unlock_irq(&priv->driver_lock);
>
> if (!priv->fw_ready)
> continue;
> @@ -894,6 +906,9 @@ static int lbs_thread(void *data)
> (priv->psstate == PS_STATE_PRE_SLEEP))
> continue;
>
> + if (priv->is_deep_sleep)
> + continue;
> +
> /* Execute the next command */
> if (!priv->dnld_sent && !priv->cur_cmd)
> lbs_execute_next_command(priv);
> @@ -928,6 +943,7 @@ static int lbs_thread(void *data)
> }
>
> del_timer(&priv->command_timer);
> + del_timer(&priv->auto_deepsleep_timer);
> wake_up_all(&priv->cmd_pending);
>
> lbs_deb_leave(LBS_DEB_THREAD);
> @@ -1050,6 +1066,60 @@ out:
> lbs_deb_leave(LBS_DEB_CMD);
> }
>
> +/**
> + * This function put the device back to deep sleep mode when timer expires
> + * and no activity (command, event, data etc.) is detected.
> + */
> +static void auto_deepsleep_timer_fn(unsigned long data)
> +{
> + struct lbs_private *priv = (struct lbs_private *)data;
> + int ret;
> +
> + lbs_deb_enter(LBS_DEB_CMD);
> +
> + if (priv->is_activity_detected) {
> + priv->is_activity_detected = 0;
> + } else {
> + if (priv->is_auto_deep_sleep_enabled &&
> + (!priv->wakeup_dev_required) &&
> + (priv->connect_status != LBS_CONNECTED)) {
> + lbs_deb_main("Entering auto deep sleep mode...\n");
> + ret = lbs_prepare_and_send_command(priv,
> + CMD_802_11_DEEP_SLEEP, 0,
> + 0, 0, NULL);
> + }
> + }
> + mod_timer(&priv->auto_deepsleep_timer , jiffies +
> + (priv->auto_deep_sleep_timeout * HZ)/1000);
> + lbs_deb_leave(LBS_DEB_CMD);
> +}
> +
> +int lbs_enter_auto_deep_sleep(struct lbs_private *priv)
> +{
> + lbs_deb_enter(LBS_DEB_SDIO);
> +
> + priv->is_auto_deep_sleep_enabled = 1;
> + if (priv->is_deep_sleep)
> + priv->wakeup_dev_required = 1;
> + mod_timer(&priv->auto_deepsleep_timer ,
> + jiffies + (priv->auto_deep_sleep_timeout * HZ)/1000);
> +
> + lbs_deb_leave(LBS_DEB_SDIO);
> + return 0;
> +}
> +
> +int lbs_exit_auto_deep_sleep(struct lbs_private *priv)
> +{
> + lbs_deb_enter(LBS_DEB_SDIO);
> +
> + priv->is_auto_deep_sleep_enabled = 0;
> + priv->auto_deep_sleep_timeout = 0;
> + del_timer(&priv->auto_deepsleep_timer);
> +
> + lbs_deb_leave(LBS_DEB_SDIO);
> + return 0;
> +}
> +
> static void lbs_sync_channel_worker(struct work_struct *work)
> {
> struct lbs_private *priv = container_of(work, struct lbs_private,
> @@ -1099,11 +1169,17 @@ static int lbs_init_adapter(struct lbs_private *priv)
> priv->capability = WLAN_CAPABILITY_SHORT_PREAMBLE;
> priv->psmode = LBS802_11POWERMODECAM;
> priv->psstate = PS_STATE_FULL_POWER;
> + priv->is_deep_sleep = 0;
> + priv->is_auto_deep_sleep_enabled = 0;
> + priv->wakeup_dev_required = 0;
> + init_waitqueue_head(&priv->ds_awake_q);
>
> mutex_init(&priv->lock);
>
> setup_timer(&priv->command_timer, command_timer_fn,
> (unsigned long)priv);
> + setup_timer(&priv->auto_deepsleep_timer, auto_deepsleep_timer_fn,
> + (unsigned long)priv);
>
> INIT_LIST_HEAD(&priv->cmdfreeq);
> INIT_LIST_HEAD(&priv->cmdpendingq);
> @@ -1142,6 +1218,7 @@ static void lbs_free_adapter(struct lbs_private *priv)
> if (priv->event_fifo)
> kfifo_free(priv->event_fifo);
> del_timer(&priv->command_timer);
> + del_timer(&priv->auto_deepsleep_timer);
> kfree(priv->networks);
> priv->networks = NULL;
>
> @@ -1272,6 +1349,11 @@ void lbs_remove_card(struct lbs_private *priv)
> wrqu.ap_addr.sa_family = ARPHRD_ETHER;
> wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL);
>
> + if (priv->is_deep_sleep) {
> + priv->is_deep_sleep = 0;
> + wake_up_interruptible(&priv->ds_awake_q);
> + }
> +
> /* Stop the thread servicing the interrupts */
> priv->surpriseremoved = 1;
> kthread_stop(priv->main_thread);
> @@ -1392,6 +1474,7 @@ void lbs_stop_card(struct lbs_private *priv)
>
> /* Delete the timeout of the currently processing command */
> del_timer_sync(&priv->command_timer);
> + del_timer_sync(&priv->auto_deepsleep_timer);
>
> /* Flush pending command nodes */
> spin_lock_irqsave(&priv->driver_lock, flags);
> diff --git a/drivers/net/wireless/libertas/scan.c b/drivers/net/wireless/libertas/scan.c
> index 6c95af3..e468e15 100644
> --- a/drivers/net/wireless/libertas/scan.c
> +++ b/drivers/net/wireless/libertas/scan.c
> @@ -950,6 +950,11 @@ int lbs_set_scan(struct net_device *dev, struct iw_request_info *info,
>
> lbs_deb_enter(LBS_DEB_WEXT);
>
> + if (!lbs_is_cmd_allowed(priv)) {
> + ret = -EBUSY;
> + goto out;
> + }
> +
> if (!priv->radio_on) {
> ret = -EINVAL;
> goto out;
> @@ -1017,6 +1022,12 @@ int lbs_get_scan(struct net_device *dev, struct iw_request_info *info,
>
> lbs_deb_enter(LBS_DEB_WEXT);
>
> + if (!lbs_is_cmd_allowed(priv)) {
> + err = -EBUSY;
> + lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", err);
> + return err;
> + }
> +
> /* iwlist should wait until the current scan is finished */
> if (priv->scan_channel)
> return -EAGAIN;
> diff --git a/drivers/net/wireless/libertas/wext.c b/drivers/net/wireless/libertas/wext.c
> index be837a0..38a451e 100644
> --- a/drivers/net/wireless/libertas/wext.c
> +++ b/drivers/net/wireless/libertas/wext.c
> @@ -45,6 +45,31 @@ static inline void lbs_cancel_association_work(struct lbs_private *priv)
> priv->pending_assoc_req = NULL;
> }
>
> +/**
> + * @brief This function checks if the command is allowed.
> + *
> + * @param priv A pointer to lbs_private structure
> + * @return allowed or not allowed.
> + */
> +
> +int lbs_is_cmd_allowed(struct lbs_private *priv)
> +{
> + int ret = 1;
> +
> + lbs_deb_enter(LBS_DEB_WEXT);
> +
> + if (!priv->is_auto_deep_sleep_enabled) {
> + if (priv->is_deep_sleep) {
> + lbs_deb_wext("IOCTLS called when station"
> + "is in deep sleep\n");
> + ret = 0;
> + }
> + }
> +
> + lbs_deb_leave(LBS_DEB_WEXT);
> + return ret;
> +}
> +
>
> /**
> * @brief Find the channel frequency power info with specific channel
> @@ -168,6 +193,11 @@ static int lbs_get_freq(struct net_device *dev, struct iw_request_info *info,
>
> lbs_deb_enter(LBS_DEB_WEXT);
>
> + if (!lbs_is_cmd_allowed(priv)) {
> + lbs_deb_leave(LBS_DEB_WEXT);
> + return -EBUSY;
> + }
> +
> cfp = lbs_find_cfp_by_band_and_channel(priv, 0,
> priv->curbssparams.channel);
>
> @@ -278,6 +308,12 @@ static int lbs_set_rts(struct net_device *dev, struct iw_request_info *info,
>
> lbs_deb_enter(LBS_DEB_WEXT);
>
> + if (!lbs_is_cmd_allowed(priv)) {
> + ret = -EBUSY;
> + lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", ret);
> + return ret;
> + }
> +
> if (vwrq->disabled)
> val = MRVDRV_RTS_MAX_VALUE;
>
> @@ -299,6 +335,11 @@ static int lbs_get_rts(struct net_device *dev, struct iw_request_info *info,
>
> lbs_deb_enter(LBS_DEB_WEXT);
>
> + if (!lbs_is_cmd_allowed(priv)) {
> + ret = -EBUSY;
> + goto out;
> + }
> +
> ret = lbs_get_snmp_mib(priv, SNMP_MIB_OID_RTS_THRESHOLD, &val);
> if (ret)
> goto out;
> @@ -321,6 +362,12 @@ static int lbs_set_frag(struct net_device *dev, struct iw_request_info *info,
>
> lbs_deb_enter(LBS_DEB_WEXT);
>
> + if (!lbs_is_cmd_allowed(priv)) {
> + ret = -EBUSY;
> + lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", ret);
> + return ret;
> + }
> +
> if (vwrq->disabled)
> val = MRVDRV_FRAG_MAX_VALUE;
>
> @@ -342,6 +389,11 @@ static int lbs_get_frag(struct net_device *dev, struct iw_request_info *info,
>
> lbs_deb_enter(LBS_DEB_WEXT);
>
> + if (!lbs_is_cmd_allowed(priv)) {
> + ret = -EBUSY;
> + goto out;
> + }
> +
> ret = lbs_get_snmp_mib(priv, SNMP_MIB_OID_FRAG_THRESHOLD, &val);
> if (ret)
> goto out;
> @@ -391,6 +443,11 @@ static int lbs_get_txpow(struct net_device *dev,
>
> lbs_deb_enter(LBS_DEB_WEXT);
>
> + if (!lbs_is_cmd_allowed(priv)) {
> + ret = -EBUSY;
> + goto out;
> + }
> +
> if (!priv->radio_on) {
> lbs_deb_wext("tx power off\n");
> vwrq->value = 0;
> @@ -424,6 +481,11 @@ static int lbs_set_retry(struct net_device *dev, struct iw_request_info *info,
>
> lbs_deb_enter(LBS_DEB_WEXT);
>
> + if (!lbs_is_cmd_allowed(priv)) {
> + ret = -EBUSY;
> + goto out;
> + }
> +
> if ((vwrq->flags & IW_RETRY_TYPE) != IW_RETRY_LIMIT)
> return -EOPNOTSUPP;
>
> @@ -472,6 +534,11 @@ static int lbs_get_retry(struct net_device *dev, struct iw_request_info *info,
>
> lbs_deb_enter(LBS_DEB_WEXT);
>
> + if (!lbs_is_cmd_allowed(priv)) {
> + ret = -EBUSY;
> + goto out;
> + }
> +
> vwrq->disabled = 0;
>
> if (vwrq->flags & IW_RETRY_LONG) {
> @@ -709,6 +776,7 @@ static int lbs_set_power(struct net_device *dev, struct iw_request_info *info,
> struct iw_param *vwrq, char *extra)
> {
> struct lbs_private *priv = dev->ml_priv;
> + int ret = 0;
>
> lbs_deb_enter(LBS_DEB_WEXT);
>
> @@ -737,8 +805,54 @@ static int lbs_set_power(struct net_device *dev, struct iw_request_info *info,
> "setting power timeout is not supported\n");
> return -EINVAL;
> } else if ((vwrq->flags & IW_POWER_TYPE) == IW_POWER_PERIOD) {
> - lbs_deb_wext("setting power period not supported\n");
> - return -EINVAL;
> + vwrq->value = vwrq->value / 1000;
> + if (!priv->enter_deep_sleep) {
> + lbs_pr_err("deep sleep feature is not implemented "
> + "for this interface driver\n");
> + return -EINVAL;
> + }
> +
> + if (priv->connect_status == LBS_CONNECTED) {
> + if ((priv->is_auto_deep_sleep_enabled) &&
> + (vwrq->value == -1000)) {
> + lbs_exit_auto_deep_sleep(priv);
> + return 0;
> + } else {
> + lbs_pr_err("can't use deep sleep cmd in "
> + "connected state\n");
> + return -EINVAL;
> + }
> + }
> +
> + if ((vwrq->value < 0) && (vwrq->value != -1000)) {
> + lbs_pr_err("unknown option\n");
> + return -EINVAL;
> + }
> +
> + if (vwrq->value > 0) {
> + if (!priv->is_auto_deep_sleep_enabled) {
> + priv->is_activity_detected = 0;
> + priv->auto_deep_sleep_timeout = vwrq->value;
> + lbs_enter_auto_deep_sleep(priv);
> + } else {
> + priv->auto_deep_sleep_timeout = vwrq->value;
> + lbs_deb_debugfs("auto deep sleep: "
> + "already enabled\n");
> + }
> + return 0;
> + } else {
> + if (priv->is_auto_deep_sleep_enabled) {
> + lbs_exit_auto_deep_sleep(priv);
> + /* Try to exit deep sleep if auto */
> + /*deep sleep disabled */
> + ret = lbs_set_deep_sleep(priv, 0);
> + }
> + if (vwrq->value == 0)
> + ret = lbs_set_deep_sleep(priv, 1);
> + else if (vwrq->value == -1000)
> + ret = lbs_set_deep_sleep(priv, 0);
> + return ret;
> + }
> }
>
> if (priv->psmode != LBS802_11POWERMODECAM) {
> @@ -752,6 +866,7 @@ static int lbs_set_power(struct net_device *dev, struct iw_request_info *info,
> }
>
> lbs_deb_leave(LBS_DEB_WEXT);
> +
> return 0;
> }
>
> @@ -792,6 +907,9 @@ static struct iw_statistics *lbs_get_wireless_stats(struct net_device *dev)
>
> lbs_deb_enter(LBS_DEB_WEXT);
>
> + if (!lbs_is_cmd_allowed(priv))
> + return NULL;
> +
> priv->wstats.status = priv->mode;
>
> /* If we're not associated, all quality values are meaningless */
> @@ -892,6 +1010,12 @@ static int lbs_set_freq(struct net_device *dev, struct iw_request_info *info,
>
> lbs_deb_enter(LBS_DEB_WEXT);
>
> + if (!lbs_is_cmd_allowed(priv)) {
> + ret = -EBUSY;
> + lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", ret);
> + return ret;
> + }
> +
> mutex_lock(&priv->lock);
> assoc_req = lbs_get_association_request(priv);
> if (!assoc_req) {
> @@ -1000,6 +1124,12 @@ static int lbs_set_rate(struct net_device *dev, struct iw_request_info *info,
> u8 rates[MAX_RATES + 1];
>
> lbs_deb_enter(LBS_DEB_WEXT);
> +
> + if (!lbs_is_cmd_allowed(priv)) {
> + ret = -EBUSY;
> + goto out;
> + }
> +
> lbs_deb_wext("vwrq->value %d\n", vwrq->value);
> lbs_deb_wext("vwrq->fixed %d\n", vwrq->fixed);
>
> @@ -1058,6 +1188,11 @@ static int lbs_get_rate(struct net_device *dev, struct iw_request_info *info,
>
> lbs_deb_enter(LBS_DEB_WEXT);
>
> + if (!lbs_is_cmd_allowed(priv)) {
> + lbs_deb_leave(LBS_DEB_WEXT);
> + return -EBUSY;
> + }
> +
> if (priv->connect_status == LBS_CONNECTED) {
> vwrq->value = priv->cur_rate * 500000;
>
> @@ -1084,6 +1219,11 @@ static int lbs_set_mode(struct net_device *dev,
>
> lbs_deb_enter(LBS_DEB_WEXT);
>
> + if (!lbs_is_cmd_allowed(priv)) {
> + ret = -EBUSY;
> + goto out;
> + }
> +
> if ( (*uwrq != IW_MODE_ADHOC)
> && (*uwrq != IW_MODE_INFRA)
> && (*uwrq != IW_MODE_AUTO)) {
> @@ -1325,6 +1465,12 @@ static int lbs_set_encode(struct net_device *dev,
>
> lbs_deb_enter(LBS_DEB_WEXT);
>
> + if (!lbs_is_cmd_allowed(priv)) {
> + ret = -EBUSY;
> + lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", ret);
> + return ret;
> + }
> +
> mutex_lock(&priv->lock);
> assoc_req = lbs_get_association_request(priv);
> if (!assoc_req) {
> @@ -1508,6 +1654,12 @@ static int lbs_set_encodeext(struct net_device *dev,
>
> lbs_deb_enter(LBS_DEB_WEXT);
>
> + if (!lbs_is_cmd_allowed(priv)) {
> + ret = -EBUSY;
> + lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", ret);
> + return ret;
> + }
> +
> mutex_lock(&priv->lock);
> assoc_req = lbs_get_association_request(priv);
> if (!assoc_req) {
> @@ -1720,6 +1872,12 @@ static int lbs_set_auth(struct net_device *dev,
>
> lbs_deb_enter(LBS_DEB_WEXT);
>
> + if (!lbs_is_cmd_allowed(priv)) {
> + ret = -EBUSY;
> + lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", ret);
> + return ret;
> + }
> +
> mutex_lock(&priv->lock);
> assoc_req = lbs_get_association_request(priv);
> if (!assoc_req) {
> @@ -1822,6 +1980,12 @@ static int lbs_get_auth(struct net_device *dev,
>
> lbs_deb_enter(LBS_DEB_WEXT);
>
> + if (!lbs_is_cmd_allowed(priv)) {
> + ret = -EBUSY;
> + lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", ret);
> + return ret;
> + }
> +
> switch (dwrq->flags & IW_AUTH_INDEX) {
> case IW_AUTH_KEY_MGMT:
> dwrq->value = priv->secinfo.key_mgmt;
> @@ -1864,6 +2028,11 @@ static int lbs_set_txpow(struct net_device *dev, struct iw_request_info *info,
>
> lbs_deb_enter(LBS_DEB_WEXT);
>
> + if (!lbs_is_cmd_allowed(priv)) {
> + ret = -EBUSY;
> + goto out;
> + }
> +
> if (vwrq->disabled) {
> lbs_set_radio(priv, RADIO_PREAMBLE_AUTO, 0);
> goto out;
> @@ -1983,6 +2152,12 @@ static int lbs_set_essid(struct net_device *dev, struct iw_request_info *info,
>
> lbs_deb_enter(LBS_DEB_WEXT);
>
> + if (!lbs_is_cmd_allowed(priv)) {
> + ret = -EBUSY;
> + lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", ret);
> + return ret;
> + }
> +
> if (!priv->radio_on) {
> ret = -EINVAL;
> goto out;
> @@ -2110,6 +2285,12 @@ static int lbs_set_wap(struct net_device *dev, struct iw_request_info *info,
>
> lbs_deb_enter(LBS_DEB_WEXT);
>
> + if (!lbs_is_cmd_allowed(priv)) {
> + ret = -EBUSY;
> + lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", ret);
> + return ret;
> + }
> +
> if (!priv->radio_on)
> return -EINVAL;
>
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