wl12xx: add driver

wl12xx is a driver for TI wl1251 802.11 chipset designed for embedded
devices, supporting both SDIO and SPI busses. Currently the driver
supports only SPI. Adding support 1253 (the 5 GHz version) should be
relatively easy. More information here:

http://focus.ti.com/general/docs/wtbu/wtbuproductcontent.tsp?contentId=4711&navigationId=12494&templateId=6123

(Collapsed original sequence of pre-merge patches into single commit for
initial merge. -- JWL)

Signed-off-by: Kalle Valo <kalle.valo@nokia.com>
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 127 insertions, 0 deletions

diff --git a/drivers/net/wireless/wl12xx/event.c b/drivers/net/wireless/wl12xx/event.c
new file mode 100644
index 000000000000..99529ca89a7e
--- /dev/null
+++ b/drivers/net/wireless/wl12xx/event.c
@@ -0,0 +1,127 @@
+/*
+ * This file is part of wl12xx
+ *
+ * Copyright (c) 1998-2007 Texas Instruments Incorporated
+ * Copyright (C) 2008 Nokia Corporation
+ *
+ * Contact: Kalle Valo <kalle.valo@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include "wl12xx.h"
+#include "reg.h"
+#include "spi.h"
+#include "event.h"
+#include "ps.h"
+
+static int wl12xx_event_scan_complete(struct wl12xx *wl,
+                                      struct event_mailbox *mbox)
+{
+        wl12xx_debug(DEBUG_EVENT, "status: 0x%x, channels: %d",
+                     mbox->scheduled_scan_status,
+                     mbox->scheduled_scan_channels);
+
+        if (wl->scanning) {
+                mutex_unlock(&wl->mutex);
+                ieee80211_scan_completed(wl->hw, false);
+                mutex_lock(&wl->mutex);
+                wl->scanning = false;
+        }
+
+        return 0;
+}
+
+static void wl12xx_event_mbox_dump(struct event_mailbox *mbox)
+{
+        wl12xx_debug(DEBUG_EVENT, "MBOX DUMP:");
+        wl12xx_debug(DEBUG_EVENT, "\tvector: 0x%x", mbox->events_vector);
+        wl12xx_debug(DEBUG_EVENT, "\tmask: 0x%x", mbox->events_mask);
+}
+
+static int wl12xx_event_process(struct wl12xx *wl, struct event_mailbox *mbox)
+{
+        int ret;
+        u32 vector;
+
+        wl12xx_event_mbox_dump(mbox);
+
+        vector = mbox->events_vector & ~(mbox->events_mask);
+        wl12xx_debug(DEBUG_EVENT, "vector: 0x%x", vector);
+
+        if (vector & SCAN_COMPLETE_EVENT_ID) {
+                ret = wl12xx_event_scan_complete(wl, mbox);
+                if (ret < 0)
+                        return ret;
+        }
+
+        if (vector & BSS_LOSE_EVENT_ID) {
+                wl12xx_debug(DEBUG_EVENT, "BSS_LOSE_EVENT");
+
+                if (wl->psm_requested && wl->psm) {
+                        ret = wl12xx_ps_set_mode(wl, STATION_ACTIVE_MODE);
+                        if (ret < 0)
+                                return ret;
+                }
+        }
+
+        return 0;
+}
+
+int wl12xx_event_unmask(struct wl12xx *wl)
+{
+        int ret;
+
+        ret = wl12xx_acx_event_mbox_mask(wl, ~(wl->event_mask));
+        if (ret < 0)
+                return ret;
+
+        return 0;
+}
+
+void wl12xx_event_mbox_config(struct wl12xx *wl)
+{
+        wl->mbox_ptr[0] = wl12xx_reg_read32(wl, REG_EVENT_MAILBOX_PTR);
+        wl->mbox_ptr[1] = wl->mbox_ptr[0] + sizeof(struct event_mailbox);
+
+        wl12xx_debug(DEBUG_EVENT, "MBOX ptrs: 0x%x 0x%x",
+                     wl->mbox_ptr[0], wl->mbox_ptr[1]);
+}
+
+int wl12xx_event_handle(struct wl12xx *wl, u8 mbox_num)
+{
+        struct event_mailbox mbox;
+        int ret;
+
+        wl12xx_debug(DEBUG_EVENT, "EVENT on mbox %d", mbox_num);
+
+        if (mbox_num > 1)
+                return -EINVAL;
+
+        /* first we read the mbox descriptor */
+        wl12xx_spi_mem_read(wl, wl->mbox_ptr[mbox_num], &mbox,
+                            sizeof(struct event_mailbox));
+
+        /* process the descriptor */
+        ret = wl12xx_event_process(wl, &mbox);
+        if (ret < 0)
+                return ret;
+
+        /* then we let the firmware know it can go on...*/
+        wl12xx_reg_write32(wl, ACX_REG_INTERRUPT_TRIG, INTR_TRIG_EVENT_ACK);
+
+        return 0;
+}