libertas SDIO: convert to asynchronous firmware loading

Signed-off-by: Daniel Drake <dsd@laptop.org>
Acked-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 121 insertions, 85 deletions

diff --git a/drivers/net/wireless/libertas/if_sdio.c b/drivers/net/wireless/libertas/if_sdio.c
index 6590febb366b..76caebaa4397 100644
--- a/drivers/net/wireless/libertas/if_sdio.c
+++ b/drivers/net/wireless/libertas/if_sdio.c
@@ -117,6 +117,8 @@ struct if_sdio_card {
         int                     model;
         unsigned long           ioport;
         unsigned int            scratch_reg;
+        bool                    started;
+        wait_queue_head_t       pwron_waitq;
 
         u8                      buffer[65536] __attribute__((aligned(4)));
 
@@ -129,6 +131,9 @@ struct if_sdio_card {
         u8                      rx_unit;
 };
 
+static void if_sdio_finish_power_on(struct if_sdio_card *card);
+static int if_sdio_power_off(struct if_sdio_card *card);
+
 /********************************************************************/
 /* I/O                                                              */
 /********************************************************************/
@@ -669,12 +674,39 @@ out:
         return ret;
 }
 
+static void if_sdio_do_prog_firmware(struct lbs_private *priv, int ret,
+                                     const struct firmware *helper,
+                                     const struct firmware *mainfw)
+{
+        struct if_sdio_card *card = priv->card;
+
+        if (ret) {
+                pr_err("failed to find firmware (%d)\n", ret);
+                return;
+        }
+
+        ret = if_sdio_prog_helper(card, helper);
+        if (ret)
+                goto out;
+
+        lbs_deb_sdio("Helper firmware loaded\n");
+
+        ret = if_sdio_prog_real(card, mainfw);
+        if (ret)
+                goto out;
+
+        lbs_deb_sdio("Firmware loaded\n");
+        if_sdio_finish_power_on(card);
+
+out:
+        release_firmware(helper);
+        release_firmware(mainfw);
+}
+
 static int if_sdio_prog_firmware(struct if_sdio_card *card)
 {
         int ret;
         u16 scratch;
-        const struct firmware *helper = NULL;
-        const struct firmware *mainfw = NULL;
 
         lbs_deb_enter(LBS_DEB_SDIO);
 
@@ -708,41 +740,18 @@ static int if_sdio_prog_firmware(struct if_sdio_card *card)
          */
         if (scratch == IF_SDIO_FIRMWARE_OK) {
                 lbs_deb_sdio("firmware already loaded\n");
-                goto success;
+                if_sdio_finish_power_on(card);
+                return 0;
         } else if ((card->model == MODEL_8686) && (scratch & 0x7fff)) {
                 lbs_deb_sdio("firmware may be running\n");
-                goto success;
-        }
-
-        ret = lbs_get_firmware(&card->func->dev, card->model, &fw_table[0],
-                                &helper, &mainfw);
-        if (ret) {
-                pr_err("failed to find firmware (%d)\n", ret);
-                goto out;
+                if_sdio_finish_power_on(card);
+                return 0;
         }
 
-        ret = if_sdio_prog_helper(card, helper);
-        if (ret)
-                goto out;
-
-        lbs_deb_sdio("Helper firmware loaded\n");
-
-        ret = if_sdio_prog_real(card, mainfw);
-        if (ret)
-                goto out;
-
-        lbs_deb_sdio("Firmware loaded\n");
-
-success:
-        sdio_claim_host(card->func);
-        sdio_set_block_size(card->func, IF_SDIO_BLOCK_SIZE);
-        sdio_release_host(card->func);
-        ret = 0;
+        ret = lbs_get_firmware_async(card->priv, &card->func->dev, card->model,
+                                     fw_table, if_sdio_do_prog_firmware);
 
 out:
-        release_firmware(helper);
-        release_firmware(mainfw);
-
         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
         return ret;
 }
@@ -751,55 +760,15 @@ out:
 /* Power management                                                 */
 /********************************************************************/
 
-static int if_sdio_power_on(struct if_sdio_card *card)
+/* Finish power on sequence (after firmware is loaded) */
+static void if_sdio_finish_power_on(struct if_sdio_card *card)
 {
         struct sdio_func *func = card->func;
         struct lbs_private *priv = card->priv;
-        struct mmc_host *host = func->card->host;
         int ret;
 
         sdio_claim_host(func);
-
-        ret = sdio_enable_func(func);
-        if (ret)
-                goto release;
-
-        /* For 1-bit transfers to the 8686 model, we need to enable the
-         * interrupt flag in the CCCR register. Set the MMC_QUIRK_LENIENT_FN0
-         * bit to allow access to non-vendor registers. */
-        if ((card->model == MODEL_8686) &&
-            (host->caps & MMC_CAP_SDIO_IRQ) &&
-            (host->ios.bus_width == MMC_BUS_WIDTH_1)) {
-                u8 reg;
-
-                func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
-                reg = sdio_f0_readb(func, SDIO_CCCR_IF, &ret);
-                if (ret)
-                        goto disable;
-
-                reg |= SDIO_BUS_ECSI;
-                sdio_f0_writeb(func, reg, SDIO_CCCR_IF, &ret);
-                if (ret)
-                        goto disable;
-        }
-
-        card->ioport = sdio_readb(func, IF_SDIO_IOPORT, &ret);
-        if (ret)
-                goto disable;
-
-        card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 1, &ret) << 8;
-        if (ret)
-                goto disable;
-
-        card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 2, &ret) << 16;
-        if (ret)
-                goto disable;
-
-        sdio_release_host(func);
-        ret = if_sdio_prog_firmware(card);
-        sdio_claim_host(func);
-        if (ret)
-                goto disable;
+        sdio_set_block_size(card->func, IF_SDIO_BLOCK_SIZE);
 
         /*
          * Get rx_unit if the chip is SD8688 or newer.
@@ -824,7 +793,7 @@ static int if_sdio_power_on(struct if_sdio_card *card)
          */
         ret = sdio_claim_irq(func, if_sdio_interrupt);
         if (ret)
-                goto disable;
+                goto release;
 
         /*
          * Enable interrupts now that everything is set up
@@ -850,11 +819,79 @@ static int if_sdio_power_on(struct if_sdio_card *card)
         }
 
         priv->fw_ready = 1;
+        wake_up(&card->pwron_waitq);
 
-        return 0;
+        if (!card->started) {
+                ret = lbs_start_card(priv);
+                if_sdio_power_off(card);
+                if (ret == 0) {
+                        card->started = true;
+                        /* Tell PM core that we don't need the card to be
+                         * powered now */
+                        pm_runtime_put_noidle(&func->dev);
+                }
+        }
+
+        return;
 
 release_irq:
         sdio_release_irq(func);
+release:
+        sdio_release_host(func);
+}
+
+static int if_sdio_power_on(struct if_sdio_card *card)
+{
+        struct sdio_func *func = card->func;
+        struct mmc_host *host = func->card->host;
+        int ret;
+
+        sdio_claim_host(func);
+
+        ret = sdio_enable_func(func);
+        if (ret)
+                goto release;
+
+        /* For 1-bit transfers to the 8686 model, we need to enable the
+         * interrupt flag in the CCCR register. Set the MMC_QUIRK_LENIENT_FN0
+         * bit to allow access to non-vendor registers. */
+        if ((card->model == MODEL_8686) &&
+            (host->caps & MMC_CAP_SDIO_IRQ) &&
+            (host->ios.bus_width == MMC_BUS_WIDTH_1)) {
+                u8 reg;
+
+                func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
+                reg = sdio_f0_readb(func, SDIO_CCCR_IF, &ret);
+                if (ret)
+                        goto disable;
+
+                reg |= SDIO_BUS_ECSI;
+                sdio_f0_writeb(func, reg, SDIO_CCCR_IF, &ret);
+                if (ret)
+                        goto disable;
+        }
+
+        card->ioport = sdio_readb(func, IF_SDIO_IOPORT, &ret);
+        if (ret)
+                goto disable;
+
+        card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 1, &ret) << 8;
+        if (ret)
+                goto disable;
+
+        card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 2, &ret) << 16;
+        if (ret)
+                goto disable;
+
+        sdio_release_host(func);
+        ret = if_sdio_prog_firmware(card);
+        if (ret) {
+                sdio_disable_func(func);
+                return ret;
+        }
+
+        return 0;
+
 disable:
         sdio_disable_func(func);
 release:
@@ -1061,11 +1098,17 @@ static int if_sdio_power_save(struct lbs_private *priv)
 static int if_sdio_power_restore(struct lbs_private *priv)
 {
         struct if_sdio_card *card = priv->card;
+        int r;
 
         /* Make sure the card will not be powered off by runtime PM */
         pm_runtime_get_sync(&card->func->dev);
 
-        return if_sdio_power_on(card);
+        r = if_sdio_power_on(card);
+        if (r)
+                return r;
+
+        wait_event(card->pwron_waitq, priv->fw_ready);
+        return 0;
 }
 
 
@@ -1166,6 +1209,7 @@ static int if_sdio_probe(struct sdio_func *func,
         spin_lock_init(&card->lock);
         card->workqueue = create_workqueue("libertas_sdio");
         INIT_WORK(&card->packet_worker, if_sdio_host_to_card_worker);
+        init_waitqueue_head(&card->pwron_waitq);
 
         /* Check if we support this card */
         for (i = 0; i < ARRAY_SIZE(fw_table); i++) {
@@ -1207,14 +1251,6 @@ static int if_sdio_probe(struct sdio_func *func,
         if (ret)
                 goto err_activate_card;
 
-        ret = lbs_start_card(priv);
-        if_sdio_power_off(card);
-        if (ret)
-                goto err_activate_card;
-
-        /* Tell PM core that we don't need the card to be powered now */
-        pm_runtime_put_noidle(&func->dev);
-
 out:
         lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);