1 files changed, 407 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/wil6210/main.c b/drivers/net/wireless/ath/wil6210/main.c
new file mode 100644
index 000000000000..95fcd361322b
--- /dev/null
+++ b/drivers/net/wireless/ath/wil6210/main.c
@@ -0,0 +1,407 @@
+/*
+ * Copyright (c) 2012 Qualcomm Atheros, Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/sched.h>
+#include <linux/ieee80211.h>
+#include <linux/wireless.h>
+#include <linux/slab.h>
+#include <linux/moduleparam.h>
+#include <linux/if_arp.h>
+
+#include "wil6210.h"
+
+/*
+ * Due to a hardware issue,
+ * one has to read/write to/from NIC in 32-bit chunks;
+ * regular memcpy_fromio and siblings will
+ * not work on 64-bit platform - it uses 64-bit transactions
+ *
+ * Force 32-bit transactions to enable NIC on 64-bit platforms
+ *
+ * To avoid byte swap on big endian host, __raw_{read|write}l
+ * should be used - {read|write}l would swap bytes to provide
+ * little endian on PCI value in host endianness.
+ */
+void wil_memcpy_fromio_32(void *dst, const volatile void __iomem *src,
+                          size_t count)
+{
+        u32 *d = dst;
+        const volatile u32 __iomem *s = src;
+
+        /* size_t is unsigned, if (count%4 != 0) it will wrap */
+        for (count += 4; count > 4; count -= 4)
+                *d++ = __raw_readl(s++);
+}
+
+void wil_memcpy_toio_32(volatile void __iomem *dst, const void *src,
+                        size_t count)
+{
+        volatile u32 __iomem *d = dst;
+        const u32 *s = src;
+
+        for (count += 4; count > 4; count -= 4)
+                __raw_writel(*s++, d++);
+}
+
+static void _wil6210_disconnect(struct wil6210_priv *wil, void *bssid)
+{
+        uint i;
+        struct net_device *ndev = wil_to_ndev(wil);
+        struct wireless_dev *wdev = wil->wdev;
+
+        wil_dbg(wil, "%s()\n", __func__);
+
+        wil_link_off(wil);
+        clear_bit(wil_status_fwconnected, &wil->status);
+
+        switch (wdev->sme_state) {
+        case CFG80211_SME_CONNECTED:
+                cfg80211_disconnected(ndev, WLAN_STATUS_UNSPECIFIED_FAILURE,
+                                      NULL, 0, GFP_KERNEL);
+                break;
+        case CFG80211_SME_CONNECTING:
+                cfg80211_connect_result(ndev, bssid, NULL, 0, NULL, 0,
+                                        WLAN_STATUS_UNSPECIFIED_FAILURE,
+                                        GFP_KERNEL);
+                break;
+        default:
+                ;
+        }
+
+        for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++)
+                wil_vring_fini_tx(wil, i);
+}
+
+static void wil_disconnect_worker(struct work_struct *work)
+{
+        struct wil6210_priv *wil = container_of(work,
+                        struct wil6210_priv, disconnect_worker);
+
+        _wil6210_disconnect(wil, NULL);
+}
+
+static void wil_connect_timer_fn(ulong x)
+{
+        struct wil6210_priv *wil = (void *)x;
+
+        wil_dbg(wil, "Connect timeout\n");
+
+        /* reschedule to thread context - disconnect won't
+         * run from atomic context
+         */
+        schedule_work(&wil->disconnect_worker);
+}
+
+int wil_priv_init(struct wil6210_priv *wil)
+{
+        wil_dbg(wil, "%s()\n", __func__);
+
+        mutex_init(&wil->mutex);
+        mutex_init(&wil->wmi_mutex);
+
+        init_completion(&wil->wmi_ready);
+
+        wil->pending_connect_cid = -1;
+        setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
+
+        INIT_WORK(&wil->wmi_connect_worker, wmi_connect_worker);
+        INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
+        INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);
+
+        INIT_LIST_HEAD(&wil->pending_wmi_ev);
+        spin_lock_init(&wil->wmi_ev_lock);
+
+        wil->wmi_wq = create_singlethread_workqueue(WIL_NAME"_wmi");
+        if (!wil->wmi_wq)
+                return -EAGAIN;
+
+        wil->wmi_wq_conn = create_singlethread_workqueue(WIL_NAME"_connect");
+        if (!wil->wmi_wq_conn) {
+                destroy_workqueue(wil->wmi_wq);
+                return -EAGAIN;
+        }
+
+        /* make shadow copy of registers that should not change on run time */
+        wil_memcpy_fromio_32(&wil->mbox_ctl, wil->csr + HOST_MBOX,
+                             sizeof(struct wil6210_mbox_ctl));
+        wil_mbox_ring_le2cpus(&wil->mbox_ctl.rx);
+        wil_mbox_ring_le2cpus(&wil->mbox_ctl.tx);
+
+        return 0;
+}
+
+void wil6210_disconnect(struct wil6210_priv *wil, void *bssid)
+{
+        del_timer_sync(&wil->connect_timer);
+        _wil6210_disconnect(wil, bssid);
+}
+
+void wil_priv_deinit(struct wil6210_priv *wil)
+{
+        cancel_work_sync(&wil->disconnect_worker);
+        wil6210_disconnect(wil, NULL);
+        wmi_event_flush(wil);
+        destroy_workqueue(wil->wmi_wq_conn);
+        destroy_workqueue(wil->wmi_wq);
+}
+
+static void wil_target_reset(struct wil6210_priv *wil)
+{
+        wil_dbg(wil, "Resetting...\n");
+
+        /* register write */
+#define W(a, v) iowrite32(v, wil->csr + HOSTADDR(a))
+        /* register set = read, OR, write */
+#define S(a, v) iowrite32(ioread32(wil->csr + HOSTADDR(a)) | v, \
+                wil->csr + HOSTADDR(a))
+
+        /* hpal_perst_from_pad_src_n_mask */
+        S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT(6));
+        /* car_perst_rst_src_n_mask */
+        S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT(7));
+
+        W(RGF_USER_MAC_CPU_0,  BIT(1)); /* mac_cpu_man_rst */
+        W(RGF_USER_USER_CPU_0, BIT(1)); /* user_cpu_man_rst */
+
+        msleep(100);
+
+        W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
+        W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
+        W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000170);
+        W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FC00);
+
+        msleep(100);
+
+        W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
+        W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
+        W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
+        W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
+
+        W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000001);
+        W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00000080);
+        W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
+
+        msleep(2000);
+
+        W(RGF_USER_USER_CPU_0, BIT(0)); /* user_cpu_man_de_rst */
+
+        msleep(2000);
+
+        wil_dbg(wil, "Reset completed\n");
+
+#undef W
+#undef S
+}
+
+void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
+{
+        le32_to_cpus(&r->base);
+        le16_to_cpus(&r->entry_size);
+        le16_to_cpus(&r->size);
+        le32_to_cpus(&r->tail);
+        le32_to_cpus(&r->head);
+}
+
+static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
+{
+        ulong to = msecs_to_jiffies(1000);
+        ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
+        if (0 == left) {
+                wil_err(wil, "Firmware not ready\n");
+                return -ETIME;
+        } else {
+                wil_dbg(wil, "FW ready after %d ms\n",
+                        jiffies_to_msecs(to-left));
+        }
+        return 0;
+}
+
+/*
+ * We reset all the structures, and we reset the UMAC.
+ * After calling this routine, you're expected to reload
+ * the firmware.
+ */
+int wil_reset(struct wil6210_priv *wil)
+{
+        int rc;
+
+        cancel_work_sync(&wil->disconnect_worker);
+        wil6210_disconnect(wil, NULL);
+
+        wmi_event_flush(wil);
+
+        flush_workqueue(wil->wmi_wq);
+        flush_workqueue(wil->wmi_wq_conn);
+
+        wil6210_disable_irq(wil);
+        wil->status = 0;
+
+        /* TODO: put MAC in reset */
+        wil_target_reset(wil);
+
+        /* init after reset */
+        wil->pending_connect_cid = -1;
+        INIT_COMPLETION(wil->wmi_ready);
+
+        /* make shadow copy of registers that should not change on run time */
+        wil_memcpy_fromio_32(&wil->mbox_ctl, wil->csr + HOST_MBOX,
+                             sizeof(struct wil6210_mbox_ctl));
+        wil_mbox_ring_le2cpus(&wil->mbox_ctl.rx);
+        wil_mbox_ring_le2cpus(&wil->mbox_ctl.tx);
+
+        /* TODO: release MAC reset */
+        wil6210_enable_irq(wil);
+
+        /* we just started MAC, wait for FW ready */
+        rc = wil_wait_for_fw_ready(wil);
+
+        return rc;
+}
+
+
+void wil_link_on(struct wil6210_priv *wil)
+{
+        struct net_device *ndev = wil_to_ndev(wil);
+
+        wil_dbg(wil, "%s()\n", __func__);
+
+        netif_carrier_on(ndev);
+        netif_tx_wake_all_queues(ndev);
+}
+
+void wil_link_off(struct wil6210_priv *wil)
+{
+        struct net_device *ndev = wil_to_ndev(wil);
+
+        wil_dbg(wil, "%s()\n", __func__);
+
+        netif_tx_stop_all_queues(ndev);
+        netif_carrier_off(ndev);
+}
+
+static int __wil_up(struct wil6210_priv *wil)
+{
+        struct net_device *ndev = wil_to_ndev(wil);
+        struct wireless_dev *wdev = wil->wdev;
+        struct ieee80211_channel *channel = wdev->preset_chandef.chan;
+        int rc;
+        int bi;
+        u16 wmi_nettype = wil_iftype_nl2wmi(wdev->iftype);
+
+        rc = wil_reset(wil);
+        if (rc)
+                return rc;
+
+        /* FIXME Firmware works now in PBSS mode(ToDS=0, FromDS=0) */
+        wmi_nettype = wil_iftype_nl2wmi(NL80211_IFTYPE_ADHOC);
+        switch (wdev->iftype) {
+        case NL80211_IFTYPE_STATION:
+                wil_dbg(wil, "type: STATION\n");
+                bi = 0;
+                ndev->type = ARPHRD_ETHER;
+                break;
+        case NL80211_IFTYPE_AP:
+                wil_dbg(wil, "type: AP\n");
+                bi = 100;
+                ndev->type = ARPHRD_ETHER;
+                break;
+        case NL80211_IFTYPE_P2P_CLIENT:
+                wil_dbg(wil, "type: P2P_CLIENT\n");
+                bi = 0;
+                ndev->type = ARPHRD_ETHER;
+                break;
+        case NL80211_IFTYPE_P2P_GO:
+                wil_dbg(wil, "type: P2P_GO\n");
+                bi = 100;
+                ndev->type = ARPHRD_ETHER;
+                break;
+        case NL80211_IFTYPE_MONITOR:
+                wil_dbg(wil, "type: Monitor\n");
+                bi = 0;
+                ndev->type = ARPHRD_IEEE80211_RADIOTAP;
+                /* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
+                break;
+        default:
+                return -EOPNOTSUPP;
+        }
+
+        /* Apply profile in the following order: */
+        /* SSID and channel for the AP */
+        switch (wdev->iftype) {
+        case NL80211_IFTYPE_AP:
+        case NL80211_IFTYPE_P2P_GO:
+                if (wdev->ssid_len == 0) {
+                        wil_err(wil, "SSID not set\n");
+                        return -EINVAL;
+                }
+                wmi_set_ssid(wil, wdev->ssid_len, wdev->ssid);
+                if (channel)
+                        wmi_set_channel(wil, channel->hw_value);
+                break;
+        default:
+                ;
+        }
+
+        /* MAC address - pre-requisite for other commands */
+        wmi_set_mac_address(wil, ndev->dev_addr);
+
+        /* Set up beaconing if required. */
+        rc = wmi_set_bcon(wil, bi, wmi_nettype);
+        if (rc)
+                return rc;
+
+        /* Rx VRING. After MAC and beacon */
+        wil_rx_init(wil);
+
+        return 0;
+}
+
+int wil_up(struct wil6210_priv *wil)
+{
+        int rc;
+
+        mutex_lock(&wil->mutex);
+        rc = __wil_up(wil);
+        mutex_unlock(&wil->mutex);
+
+        return rc;
+}
+
+static int __wil_down(struct wil6210_priv *wil)
+{
+        if (wil->scan_request) {
+                cfg80211_scan_done(wil->scan_request, true);
+                wil->scan_request = NULL;
+        }
+
+        wil6210_disconnect(wil, NULL);
+        wil_rx_fini(wil);
+
+        return 0;
+}
+
+int wil_down(struct wil6210_priv *wil)
+{
+        int rc;
+
+        mutex_lock(&wil->mutex);
+        rc = __wil_down(wil);
+        mutex_unlock(&wil->mutex);
+
+        return rc;
+}