/** * Marvell Bluetooth driver * * Copyright (C) 2009, Marvell International Ltd. * * This software file (the "File") is distributed by Marvell International * Ltd. under the terms of the GNU General Public License Version 2, June 1991 * (the "License"). You may use, redistribute and/or modify this File in * accordance with the terms and conditions of the License, a copy of which * is available by writing to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt. * * * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE * ARE EXPRESSLY DISCLAIMED. The License provides additional details about * this warranty disclaimer. **/ #include <net/bluetooth/bluetooth.h> #include <net/bluetooth/hci_core.h> #include "btmrvl_drv.h" #define VERSION "1.0" /* * This function is called by interface specific interrupt handler. * It updates Power Save & Host Sleep states, and wakes up the main * thread. */ void btmrvl_interrupt(struct btmrvl_private *priv) { priv->adapter->ps_state = PS_AWAKE; priv->adapter->wakeup_tries = 0; priv->adapter->int_count++; wake_up_interruptible(&priv->main_thread.wait_q); } EXPORT_SYMBOL_GPL(btmrvl_interrupt); void btmrvl_check_evtpkt(struct btmrvl_private *priv, struct sk_buff *skb) { struct hci_event_hdr *hdr = (void *) skb->data; struct hci_ev_cmd_complete *ec; u16 opcode, ocf; if (hdr->evt == HCI_EV_CMD_COMPLETE) { ec = (void *) (skb->data + HCI_EVENT_HDR_SIZE); opcode = __le16_to_cpu(ec->opcode); ocf = hci_opcode_ocf(opcode); if (ocf == BT_CMD_MODULE_CFG_REQ && priv->btmrvl_dev.sendcmdflag) { priv->btmrvl_dev.sendcmdflag = false; priv->adapter->cmd_complete = true; wake_up_interruptible(&priv->adapter->cmd_wait_q); } } } EXPORT_SYMBOL_GPL(btmrvl_check_evtpkt); int btmrvl_process_event(struct btmrvl_private *priv, struct sk_buff *skb) { struct btmrvl_adapter *adapter = priv->adapter; struct btmrvl_event *event; u8 ret = 0; event = (struct btmrvl_event *) skb->data; if (event->ec != 0xff) { BT_DBG("Not Marvell Event=%x", event->ec); ret = -EINVAL; goto exit; } switch (event->data[0]) { case BT_CMD_AUTO_SLEEP_MODE: if (!event->data[2]) { if (event->data[1] == BT_PS_ENABLE) adapter->psmode = 1; else adapter->psmode = 0; BT_DBG("PS Mode:%s", (adapter->psmode) ? "Enable" : "Disable"); } else { BT_DBG("PS Mode command failed"); } break; case BT_CMD_HOST_SLEEP_CONFIG: if (!event->data[3]) BT_DBG("gpio=%x, gap=%x", event->data[1], event->data[2]); else BT_DBG("HSCFG command failed"); break; case BT_CMD_HOST_SLEEP_ENABLE: if (!event->data[1]) { adapter->hs_state = HS_ACTIVATED; if (adapter->psmode) adapter->ps_state = PS_SLEEP; wake_up_interruptible(&adapter->cmd_wait_q); BT_DBG("HS ACTIVATED!"); } else { BT_DBG("HS Enable failed"); } break; case BT_CMD_MODULE_CFG_REQ: if (priv->btmrvl_dev.sendcmdflag && event->data[1] == MODULE_BRINGUP_REQ) { BT_DBG("EVENT:%s", (event->data[2]) ? "Bring-up failed" : "Bring-up succeed"); } else if (priv->btmrvl_dev.sendcmdflag && event->data[1] == MODULE_SHUTDOWN_REQ) { BT_DBG("EVENT:%s", (event->data[2]) ? "Shutdown failed" : "Shutdown succeed"); } else { BT_DBG("BT_CMD_MODULE_CFG_REQ resp for APP"); ret = -EINVAL; } break; case BT_EVENT_POWER_STATE: if (event->data[1] == BT_PS_SLEEP) adapter->ps_state = PS_SLEEP; BT_DBG("EVENT:%s", (adapter->ps_state) ? "PS_SLEEP" : "PS_AWAKE"); break; default: BT_DBG("Unknown Event=%d", event->data[0]); ret = -EINVAL; break; } exit: if (!ret) kfree_skb(skb); return ret; } EXPORT_SYMBOL_GPL(btmrvl_process_event); int btmrvl_send_module_cfg_cmd(struct btmrvl_private *priv, int subcmd) { struct sk_buff *skb; struct btmrvl_cmd *cmd; int ret = 0; skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC); if (skb == NULL) { BT_ERR("No free skb"); return -ENOMEM; } cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd)); cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF, BT_CMD_MODULE_CFG_REQ)); cmd->length = 1; cmd->data[0] = subcmd; bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT; skb->dev = (void *) priv->btmrvl_dev.hcidev; skb_queue_head(&priv->adapter->tx_queue, skb); priv->btmrvl_dev.sendcmdflag = true; priv->adapter->cmd_complete = false; BT_DBG("Queue module cfg Command"); wake_up_interruptible(&priv->main_thread.wait_q); if (!wait_event_interruptible_timeout(priv->adapter->cmd_wait_q, priv->adapter->cmd_complete, msecs_to_jiffies(WAIT_UNTIL_CMD_RESP))) { ret = -ETIMEDOUT; BT_ERR("module_cfg_cmd(%x): timeout: %d", subcmd, priv->btmrvl_dev.sendcmdflag); } BT_DBG("module cfg Command done"); return ret; } EXPORT_SYMBOL_GPL(btmrvl_send_module_cfg_cmd); int btmrvl_enable_ps(struct btmrvl_private *priv) { struct sk_buff *skb; struct btmrvl_cmd *cmd; skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC); if (skb == NULL) { BT_ERR("No free skb"); return -ENOMEM; } cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd)); cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF, BT_CMD_AUTO_SLEEP_MODE)); cmd->length = 1; if (priv->btmrvl_dev.psmode) cmd->data[0] = BT_PS_ENABLE; else cmd->data[0] = BT_PS_DISABLE; bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT; skb->dev = (void *) priv->btmrvl_dev.hcidev; skb_queue_head(&priv->adapter->tx_queue, skb); BT_DBG("Queue PSMODE Command:%d", cmd->data[0]); return 0; } EXPORT_SYMBOL_GPL(btmrvl_enable_ps); static int btmrvl_enable_hs(struct btmrvl_private *priv) { struct sk_buff *skb; struct btmrvl_cmd *cmd; int ret = 0; skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC); if (skb == NULL) { BT_ERR("No free skb"); return -ENOMEM; } cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd)); cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF, BT_CMD_HOST_SLEEP_ENABLE)); cmd->length = 0; bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT; skb->dev = (void *) priv->btmrvl_dev.hcidev; skb_queue_head(&priv->adapter->tx_queue, skb); BT_DBG("Queue hs enable Command"); wake_up_interruptible(&priv->main_thread.wait_q); if (!wait_event_interruptible_timeout(priv->adapter->cmd_wait_q, priv->adapter->hs_state, msecs_to_jiffies(WAIT_UNTIL_HS_STATE_CHANGED))) { ret = -ETIMEDOUT; BT_ERR("timeout: %d, %d,%d", priv->adapter->hs_state, priv->adapter->ps_state, priv->adapter->wakeup_tries); } return ret; } int btmrvl_prepare_command(struct btmrvl_private *priv) { struct sk_buff *skb = NULL; struct btmrvl_cmd *cmd; int ret = 0; if (priv->btmrvl_dev.hscfgcmd) { priv->btmrvl_dev.hscfgcmd = 0; skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC); if (skb == NULL) { BT_ERR("No free skb"); return -ENOMEM; } cmd = (struct btmrvl_cmd *) skb_put(skb, sizeof(*cmd)); cmd->ocf_ogf = cpu_to_le16(hci_opcode_pack(OGF, BT_CMD_HOST_SLEEP_CONFIG)); cmd->length = 2; cmd->data[0] = (priv->btmrvl_dev.gpio_gap & 0xff00) >> 8; cmd->data[1] = (u8) (priv->btmrvl_dev.gpio_gap & 0x00ff); bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT; skb->dev = (void *) priv->btmrvl_dev.hcidev; skb_queue_head(&priv->adapter->tx_queue, skb); BT_DBG("Queue HSCFG Command, gpio=0x%x, gap=0x%x", cmd->data[0], cmd->data[1]); } if (priv->btmrvl_dev.pscmd) { priv->btmrvl_dev.pscmd = 0; btmrvl_enable_ps(priv); } if (priv->btmrvl_dev.hscmd) { priv->btmrvl_dev.hscmd = 0; if (priv->btmrvl_dev.hsmode) { ret = btmrvl_enable_hs(priv); } else { ret = priv->hw_wakeup_firmware(priv); priv->adapter->hs_state = HS_DEACTIVATED; } } return ret; } static int btmrvl_tx_pkt(struct btmrvl_private *priv, struct sk_buff *skb) { int ret = 0; if (!skb || !skb->data) return -EINVAL; if (!skb->len || ((skb->len + BTM_HEADER_LEN) > BTM_UPLD_SIZE)) { BT_ERR("Tx Error: Bad skb length %d : %d", skb->len, BTM_UPLD_SIZE); return -EINVAL; } if (skb_headroom(skb) < BTM_HEADER_LEN) { struct sk_buff *tmp = skb; skb = skb_realloc_headroom(skb, BTM_HEADER_LEN); if (!skb) { BT_ERR("Tx Error: realloc_headroom failed %d", BTM_HEADER_LEN); skb = tmp; return -EINVAL; } kfree_skb(tmp); } skb_push(skb, BTM_HEADER_LEN); /* header type: byte[3] * HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor * header length: byte[2][1][0] */ skb->data[0] = (skb->len & 0x0000ff); skb->data[1] = (skb->len & 0x00ff00) >> 8; skb->data[2] = (skb->len & 0xff0000) >> 16; skb->data[3] = bt_cb(skb)->pkt_type; if (priv->hw_host_to_card) ret = priv->hw_host_to_card(priv, skb->data, skb->len); return ret; } static void btmrvl_init_adapter(struct btmrvl_private *priv) { skb_queue_head_init(&priv->adapter->tx_queue); priv->adapter->ps_state = PS_AWAKE; init_waitqueue_head(&priv->adapter->cmd_wait_q); } static void btmrvl_free_adapter(struct btmrvl_private *priv) { skb_queue_purge(&priv->adapter->tx_queue); kfree(priv->adapter); priv->adapter = NULL; } static int btmrvl_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg) { return -ENOIOCTLCMD; } static void btmrvl_destruct(struct hci_dev *hdev) { } static int btmrvl_send_frame(struct sk_buff *skb) { struct hci_dev *hdev = (struct hci_dev *) skb->dev; struct btmrvl_private *priv = NULL; BT_DBG("type=%d, len=%d", skb->pkt_type, skb->len); if (!hdev || !hdev->driver_data) { BT_ERR("Frame for unknown HCI device"); return -ENODEV; } priv = (struct btmrvl_private *) hdev->driver_data; if (!test_bit(HCI_RUNNING, &hdev->flags)) { BT_ERR("Failed testing HCI_RUNING, flags=%lx", hdev->flags); print_hex_dump_bytes("data: ", DUMP_PREFIX_OFFSET, skb->data, skb->len); return -EBUSY; } switch (bt_cb(skb)->pkt_type) { case HCI_COMMAND_PKT: hdev->stat.cmd_tx++; break; case HCI_ACLDATA_PKT: hdev->stat.acl_tx++; break; case HCI_SCODATA_PKT: hdev->stat.sco_tx++; break; } skb_queue_tail(&priv->adapter->tx_queue, skb); wake_up_interruptible(&priv->main_thread.wait_q); return 0; } static int btmrvl_flush(struct hci_dev *hdev) { struct btmrvl_private *priv = hdev->driver_data; skb_queue_purge(&priv->adapter->tx_queue); return 0; } static int btmrvl_close(struct hci_dev *hdev) { struct btmrvl_private *priv = hdev->driver_data; if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags)) return 0; skb_queue_purge(&priv->adapter->tx_queue); return 0; } static int btmrvl_open(struct hci_dev *hdev) { set_bit(HCI_RUNNING, &hdev->flags); return 0; } /* * This function handles the event generated by firmware, rx data * received from firmware, and tx data sent from kernel. */ static int btmrvl_service_main_thread(void *data) { struct btmrvl_thread *thread = data; struct btmrvl_private *priv = thread->priv; struct btmrvl_adapter *adapter = priv->adapter; wait_queue_t wait; struct sk_buff *skb; ulong flags; init_waitqueue_entry(&wait, current); current->flags |= PF_NOFREEZE; for (;;) { add_wait_queue(&thread->wait_q, &wait); set_current_state(TASK_INTERRUPTIBLE); if (adapter->wakeup_tries || ((!adapter->int_count) && (!priv->btmrvl_dev.tx_dnld_rdy || skb_queue_empty(&adapter->tx_queue)))) { BT_DBG("main_thread is sleeping..."); schedule(); } set_current_state(TASK_RUNNING); remove_wait_queue(&thread->wait_q, &wait); BT_DBG("main_thread woke up"); if (kthread_should_stop()) { BT_DBG("main_thread: break from main thread"); break; } spin_lock_irqsave(&priv->driver_lock, flags); if (adapter->int_count) { adapter->int_count = 0; } else if (adapter->ps_state == PS_SLEEP && !skb_queue_empty(&adapter->tx_queue)) { spin_unlock_irqrestore(&priv->driver_lock, flags); adapter->wakeup_tries++; priv->hw_wakeup_firmware(priv); continue; } spin_unlock_irqrestore(&priv->driver_lock, flags); if (adapter->ps_state == PS_SLEEP) continue; if (!priv->btmrvl_dev.tx_dnld_rdy) continue; skb = skb_dequeue(&adapter->tx_queue); if (skb) { if (btmrvl_tx_pkt(priv, skb)) priv->btmrvl_dev.hcidev->stat.err_tx++; else priv->btmrvl_dev.hcidev->stat.byte_tx += skb->len; kfree_skb(skb); } } return 0; } struct btmrvl_private *btmrvl_add_card(void *card) { struct hci_dev *hdev = NULL; struct btmrvl_private *priv; int ret; priv = kzalloc(sizeof(*priv), GFP_KERNEL); if (!priv) { BT_ERR("Can not allocate priv"); goto err_priv; } priv->adapter = kzalloc(sizeof(*priv->adapter), GFP_KERNEL); if (!priv->adapter) { BT_ERR("Allocate buffer for btmrvl_adapter failed!"); goto err_adapter; } btmrvl_init_adapter(priv); hdev = hci_alloc_dev(); if (!hdev) { BT_ERR("Can not allocate HCI device"); goto err_hdev; } BT_DBG("Starting kthread..."); priv->main_thread.priv = priv; spin_lock_init(&priv->driver_lock); init_waitqueue_head(&priv->main_thread.wait_q); priv->main_thread.task = kthread_run(btmrvl_service_main_thread, &priv->main_thread, "btmrvl_main_service"); priv->btmrvl_dev.hcidev = hdev; priv->btmrvl_dev.card = card; hdev->driver_data = priv; priv->btmrvl_dev.tx_dnld_rdy = true; hdev->type = HCI_SDIO; hdev->open = btmrvl_open; hdev->close = btmrvl_close; hdev->flush = btmrvl_flush; hdev->send = btmrvl_send_frame; hdev->destruct = btmrvl_destruct; hdev->ioctl = btmrvl_ioctl; hdev->owner = THIS_MODULE; ret = hci_register_dev(hdev); if (ret < 0) { BT_ERR("Can not register HCI device"); goto err_hci_register_dev; } #ifdef CONFIG_DEBUG_FS btmrvl_debugfs_init(hdev); #endif return priv; err_hci_register_dev: /* Stop the thread servicing the interrupts */ kthread_stop(priv->main_thread.task); hci_free_dev(hdev); err_hdev: btmrvl_free_adapter(priv); err_adapter: kfree(priv); err_priv: return NULL; } EXPORT_SYMBOL_GPL(btmrvl_add_card); int btmrvl_remove_card(struct btmrvl_private *priv) { struct hci_dev *hdev; hdev = priv->btmrvl_dev.hcidev; wake_up_interruptible(&priv->adapter->cmd_wait_q); kthread_stop(priv->main_thread.task); #ifdef CONFIG_DEBUG_FS btmrvl_debugfs_remove(hdev); #endif hci_unregister_dev(hdev); hci_free_dev(hdev); priv->btmrvl_dev.hcidev = NULL; btmrvl_free_adapter(priv); kfree(priv); return 0; } EXPORT_SYMBOL_GPL(btmrvl_remove_card); MODULE_AUTHOR("Marvell International Ltd."); MODULE_DESCRIPTION("Marvell Bluetooth driver ver " VERSION); MODULE_VERSION(VERSION); MODULE_LICENSE("GPL v2");