This driver, bt_mrvl, provides basic definitions and library functions to support Marvell Bluetooth enabled devices, such as 88W8688 WLAN/BT combo chip. This patch incorporates a lot of comments given by Nicolas Pitre <nico@xxxxxxxxxxx>. Many thanks to Nicolas Pitre. Signed-off-by: Rahul Tank <rahult@xxxxxxxxxxx> Signed-off-by: Bing Zhao <bzhao@xxxxxxxxxxx> --- drivers/bluetooth/Kconfig | 2 + drivers/bluetooth/Makefile | 2 + drivers/bluetooth/bt_mrvl/Kconfig | 12 + drivers/bluetooth/bt_mrvl/Makefile | 7 + drivers/bluetooth/bt_mrvl/btm_drv.h | 223 +++++++++++ drivers/bluetooth/bt_mrvl/btm_main.c | 728 ++++++++++++++++++++++++++++++++++ 6 files changed, 974 insertions(+), 0 deletions(-) create mode 100644 drivers/bluetooth/bt_mrvl/Kconfig create mode 100644 drivers/bluetooth/bt_mrvl/Makefile create mode 100644 drivers/bluetooth/bt_mrvl/btm_drv.h create mode 100644 drivers/bluetooth/bt_mrvl/btm_main.c diff --git a/drivers/bluetooth/Kconfig b/drivers/bluetooth/Kconfig index 1164837..6e4b9b5 100644 --- a/drivers/bluetooth/Kconfig +++ b/drivers/bluetooth/Kconfig @@ -170,5 +170,7 @@ config BT_HCIVHCI Say Y here to compile support for virtual HCI devices into the kernel or say M to compile it as module (hci_vhci). +source "drivers/bluetooth/bt_mrvl/Kconfig" + endmenu diff --git a/drivers/bluetooth/Makefile b/drivers/bluetooth/Makefile index 16930f9..a428510 100644 --- a/drivers/bluetooth/Makefile +++ b/drivers/bluetooth/Makefile @@ -15,6 +15,8 @@ obj-$(CONFIG_BT_HCIBTUART) += btuart_cs.o obj-$(CONFIG_BT_HCIBTUSB) += btusb.o obj-$(CONFIG_BT_HCIBTSDIO) += btsdio.o +obj-$(CONFIG_BT_MRVL) += bt_mrvl/ + hci_uart-y := hci_ldisc.o hci_uart-$(CONFIG_BT_HCIUART_H4) += hci_h4.o hci_uart-$(CONFIG_BT_HCIUART_BCSP) += hci_bcsp.o diff --git a/drivers/bluetooth/bt_mrvl/Kconfig b/drivers/bluetooth/bt_mrvl/Kconfig new file mode 100644 index 0000000..9b6202b --- /dev/null +++ b/drivers/bluetooth/bt_mrvl/Kconfig @@ -0,0 +1,12 @@ +config BT_MRVL + tristate "Marvell Bluetooth driver support" + depends on BT + select FW_LOADER + help + The core driver to support Marvell Bluetooth devices. + + This driver is required if you want to support + Marvell Bluetooth devices, such as 8688. + + Say Y here to compile Marvell Bluetooth driver + into the kernel or say M to compile it as module. diff --git a/drivers/bluetooth/bt_mrvl/Makefile b/drivers/bluetooth/bt_mrvl/Makefile new file mode 100644 index 0000000..88b457b --- /dev/null +++ b/drivers/bluetooth/bt_mrvl/Makefile @@ -0,0 +1,7 @@ +# +# Makefile for Marvell Bluetooth driver +# + +bt_mrvl-objs := btm_main.o + +obj-$(CONFIG_BT_MRVL) += bt_mrvl.o diff --git a/drivers/bluetooth/bt_mrvl/btm_drv.h b/drivers/bluetooth/bt_mrvl/btm_drv.h new file mode 100644 index 0000000..68a74cc --- /dev/null +++ b/drivers/bluetooth/bt_mrvl/btm_drv.h @@ -0,0 +1,223 @@ +/* + * Marvell Bluetooth driver: global definitions & declarations + * + * 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. + * + */ + +#ifndef _BTM_DRV_H_ +#define _BTM_DRV_H_ + +#include <linux/kthread.h> +#include <linux/bitops.h> + +#define BTM_HEADER_LEN 4 + +#define DBG_MSG BIT(0) /* Message */ +#define DBG_FATAL BIT(1) /* Fatal */ +#define DBG_ERROR BIT(2) /* Error */ +#define DBG_CMD BIT(3) /* Command */ +#define DBG_DATA BIT(27) /* Data */ +#define DBG_ENTRY BIT(28) /* Entry */ +#define DBG_WARN BIT(29) /* Warning */ +#define DBG_INFO BIT(30) /* Informative */ + +#ifdef CONFIG_BT_MRVL_DEBUG +extern u32 btm_drvdbg; + +#define PRINTM_INFO(msg...) do {if (btm_drvdbg & DBG_INFO) \ + printk(KERN_DEBUG msg); } while (0) + +#define PRINTM_WARN(msg...) do {if (btm_drvdbg & DBG_WARN) \ + printk(KERN_DEBUG msg); } while (0) + +#define PRINTM_ENTRY(msg...) do {if (btm_drvdbg & DBG_ENTRY) \ + printk(KERN_DEBUG msg); } while (0) + +#define PRINTM_CMD(msg...) do {if (btm_drvdbg & DBG_CMD) \ + printk(KERN_DEBUG msg); } while (0) + +#define PRINTM_ERROR(msg...) do {if (btm_drvdbg & DBG_ERROR) \ + printk(KERN_DEBUG msg); } while (0) + +#define PRINTM_FATAL(msg...) do {if (btm_drvdbg & DBG_FATAL) \ + printk(KERN_DEBUG msg); } while (0) + +#define PRINTM_MSG(msg...) do {if (btm_drvdbg & DBG_MSG) \ + printk(KERN_ALERT msg); } while (0) + +/* Print message with required level */ +#define PRINTM(level, msg...) PRINTM_##level(msg) + +#define ENTER() PRINTM(ENTRY, "Enter: %s, %s:%i\n", \ + __func__, __FILE__, __LINE__) +#define LEAVE() PRINTM(ENTRY, "Leave: %s, %s:%i\n", \ + __func__, __FILE__, __LINE__) + +#define DBG_DUMP_BUF_LEN 64 +#define MAX_DUMP_PER_LINE 16 + +static inline void btm_hexdump(char *prompt, u8 *buf, int len) +{ + int i; + char dbgdumpbuf[DBG_DUMP_BUF_LEN]; + char *ptr = dbgdumpbuf; + + printk(KERN_DEBUG "%s: len=%d\n", prompt, len); + + for (i = 1; i <= len; i++) { + ptr += sprintf(ptr, "%02x ", *buf); + buf++; + if (i % MAX_DUMP_PER_LINE == 0) { + *ptr = 0; + printk(KERN_DEBUG "%s\n", dbgdumpbuf); + ptr = dbgdumpbuf; + } + } + + if (len % MAX_DUMP_PER_LINE) { + *ptr = 0; + printk(KERN_DEBUG "%s\n", dbgdumpbuf); + } +} + +#define DBG_HEXDUMP_DBG_DATA(x, y, z) do {if (btm_drvdbg & DBG_DATA) \ + btm_hexdump(x, y, z); \ + } while (0) + +#define DBG_HEXDUMP(level, x, y, z) DBG_HEXDUMP_##level(x, y, z) + +#else + +/* Do nothing */ +#define PRINTM(level, msg...) do {} while (0) +#define DBG_HEXDUMP(level, x, y, z) do {} while (0) +#define ENTER() do {} while (0) +#define LEAVE() do {} while (0) + +#endif /* CONFIG_BT_MRVL_DEBUG */ + +#define BT_DEV_NAME_LEN 32 +#define BT_UPLD_SIZE 2312 + +/* Time to wait until Host Sleep state change in millisecond */ +#define WAIT_UNTIL_HS_STATE_CHANGED 5000 +/* Time to wait for command response in millisecond */ +#define WAIT_UNTIL_CMD_RESP 5000 + +struct btm_thread { + struct task_struct *task; + wait_queue_head_t wait_q; + pid_t pid; + void *priv; +}; + +struct btm_device { + char name[BT_DEV_NAME_LEN]; + void *card; + struct hci_dev *hcidev; + + u8 tx_dnld_rdy; + + u8 psmode; + u8 pscmd; + u8 hsmode; + u8 hscmd; + + /* Low byte is gap, high byte is GPIO */ + u16 gpio_gap; + + u8 hscfgcmd; + u8 sendcmdflag; +}; + +struct btm_adapter { + u32 int_count; + struct sk_buff_head tx_queue; + u8 psmode; + u8 ps_state; + u8 hs_state; + u8 wakeup_tries; + wait_queue_head_t cmd_wait_q; + u8 cmd_complete; +}; + +struct btm_private { + struct btm_device btm_dev; + struct btm_adapter *adapter; + struct btm_thread main_thread; + int (*hw_host_to_card) (struct btm_private *priv, + u8 *payload, u16 nb); + int (*hw_wakeup_firmware) (struct btm_private *priv); + spinlock_t driver_lock; /* spinlock used by driver */ +}; + +#define MRVL_VENDOR_PKT 0xFE + +/* Bluetooth commands */ +#define BT_CMD_AUTO_SLEEP_MODE 0x23 +#define BT_CMD_HOST_SLEEP_CONFIG 0x59 +#define BT_CMD_HOST_SLEEP_ENABLE 0x5A +#define BT_CMD_MODULE_CFG_REQ 0x5B + +/* Sub-commands: Module Bringup/Shutdown Request */ +#define MODULE_BRINGUP_REQ 0xF1 +#define MODULE_SHUTDOWN_REQ 0xF2 + +#define BT_EVENT_POWER_STATE 0x20 + +/* Bluetooth Power States */ +#define BT_PS_ENABLE 0x02 +#define BT_PS_DISABLE 0x03 +#define BT_PS_SLEEP 0x01 + +#define OGF 0x3F + +/* Host Sleep states */ +#define HS_ACTIVATED 0x01 +#define HS_DEACTIVATED 0x00 + +/* Power Save modes */ +#define PS_SLEEP 0x01 +#define PS_AWAKE 0x00 + +struct btm_cmd { + __le16 ocf_ogf; + u8 length; + u8 data[4]; +} __attribute__ ((packed)); + +struct btm_event { + u8 ec; /* event counter */ + u8 length; + u8 data[4]; +} __attribute__ ((packed)); + +/* Prototype of global function */ + +struct btm_private *btm_add_card(void *card); +int btm_remove_card(struct btm_private *priv); + +void btm_interrupt(struct btm_private *priv); + +void btm_check_evtpkt(struct btm_private *priv, struct sk_buff *skb); +int btm_process_event(struct btm_private *priv, struct sk_buff *skb); + +int btm_send_module_cfg_cmd(struct btm_private *priv, int subcmd); +int btm_prepare_command(struct btm_private *priv); + +#endif /* _BTM_DRV_H_ */ diff --git a/drivers/bluetooth/bt_mrvl/btm_main.c b/drivers/bluetooth/bt_mrvl/btm_main.c new file mode 100644 index 0000000..0bdd297 --- /dev/null +++ b/drivers/bluetooth/bt_mrvl/btm_main.c @@ -0,0 +1,728 @@ +/** + * 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 "btm_drv.h" + +#define VERSION "1.0" + +#ifdef CONFIG_BT_MRVL_DEBUG +u32 btm_drvdbg = DBG_MSG | DBG_FATAL | DBG_ERROR; +EXPORT_SYMBOL_GPL(btm_drvdbg); +#endif + +/* + * This function is called by interface specific interrupt handler. + * It updates Power Save & Host Sleep states, and wakes up the main + * thread. + */ +void btm_interrupt(struct btm_private *priv) +{ + ENTER(); + + priv->adapter->ps_state = PS_AWAKE; + + priv->adapter->wakeup_tries = 0; + + priv->adapter->int_count++; + + wake_up_interruptible(&priv->main_thread.wait_q); + + LEAVE(); +} +EXPORT_SYMBOL_GPL(btm_interrupt); + +void btm_check_evtpkt(struct btm_private *priv, struct sk_buff *skb) +{ + struct hci_event_hdr *hdr = (struct hci_event_hdr *)skb->data; + struct hci_ev_cmd_complete *ec; + u16 opcode, ocf; + + ENTER(); + + if (hdr->evt == HCI_EV_CMD_COMPLETE) { + ec = (struct hci_ev_cmd_complete *)(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->btm_dev.sendcmdflag)) { + priv->btm_dev.sendcmdflag = false; + priv->adapter->cmd_complete = true; + wake_up_interruptible(&priv->adapter->cmd_wait_q); + } + } + + LEAVE(); +} +EXPORT_SYMBOL_GPL(btm_check_evtpkt); + +int btm_process_event(struct btm_private *priv, struct sk_buff *skb) +{ + struct btm_adapter *adapter = priv->adapter; + u8 ret = 0; + struct btm_event *event; + + ENTER(); + + event = (struct btm_event *) skb->data; + if (event->ec != 0xff) { + PRINTM(CMD, "Not Marvell Event=%x\n", 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; + PRINTM(CMD, "PS Mode:%s\n", + (adapter->psmode) ? "Enable" : "Disable"); + } else { + PRINTM(CMD, "PS Mode command failed\n"); + } + break; + + case BT_CMD_HOST_SLEEP_CONFIG: + if (!event->data[3]) + PRINTM(CMD, "gpio=%x, gap=%x\n", + event->data[1], + event->data[2]); + else + PRINTM(CMD, "HSCFG command failed\n"); + 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); + PRINTM(CMD, "HS ACTIVATED!\n"); + } else { + PRINTM(CMD, "HS Enable failed\n"); + } + break; + + case BT_CMD_MODULE_CFG_REQ: + if ((priv->btm_dev.sendcmdflag) && + (event->data[1] == MODULE_BRINGUP_REQ)) { + PRINTM(CMD, "EVENT:%s\n", + (event->data[2]) ? + "Bring-up failed" : + "Bring-up succeed"); + } else if ((priv->btm_dev.sendcmdflag) && + (event->data[1] == MODULE_SHUTDOWN_REQ)) { + PRINTM(CMD, "EVENT:%s\n", + (event->data[2]) ? + "Shutdown failed" : + "Shutdown succeed"); + } else { + PRINTM(CMD, "BT_CMD_MODULE_CFG_REQ resp for APP\n"); + ret = -EINVAL; + } + break; + + case BT_EVENT_POWER_STATE: + if (event->data[1] == BT_PS_SLEEP) + adapter->ps_state = PS_SLEEP; + PRINTM(CMD, "EVENT:%s\n", + (adapter->ps_state) ? "PS_SLEEP" : "PS_AWAKE"); + break; + + default: + PRINTM(CMD, "Unknown Event=%d\n", event->data[0]); + ret = -EINVAL; + break; + } + +exit: + if (!ret) + kfree_skb(skb); + + LEAVE(); + + return ret; +} +EXPORT_SYMBOL_GPL(btm_process_event); + +int btm_send_module_cfg_cmd(struct btm_private *priv, int subcmd) +{ + struct sk_buff *skb = NULL; + u8 ret = 0; + struct btm_cmd *cmd; + + ENTER(); + + skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC); + if (skb == NULL) { + PRINTM(WARN, "No free skb\n"); + ret = -ENOMEM; + goto exit; + } + + cmd = (struct btm_cmd *) skb->tail; + cmd->ocf_ogf = cpu_to_le16((OGF << 10) | BT_CMD_MODULE_CFG_REQ); + cmd->length = 1; + cmd->data[0] = subcmd; + + bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT; + + skb_put(skb, sizeof(*cmd)); + skb->dev = (void *)priv->btm_dev.hcidev; + skb_queue_head(&priv->adapter->tx_queue, skb); + + priv->btm_dev.sendcmdflag = true; + + priv->adapter->cmd_complete = false; + + PRINTM(CMD, "Queue module cfg Command\n"); + + 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; + PRINTM(MSG, "module_cfg_cmd(%x): timeout: %d\n", + subcmd, priv->btm_dev.sendcmdflag); + } + + PRINTM(CMD, "module cfg Command done\n"); + +exit: + LEAVE(); + + return ret; +} +EXPORT_SYMBOL_GPL(btm_send_module_cfg_cmd); + +static int btm_enable_hs(struct btm_private *priv) +{ + struct sk_buff *skb = NULL; + u8 ret = 0; + struct btm_cmd *cmd; + + ENTER(); + + skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC); + if (skb == NULL) { + PRINTM(WARN, "No free skb\n"); + ret = -ENOMEM; + goto exit; + } + + cmd = (struct btm_cmd *) skb->tail; + cmd->ocf_ogf = cpu_to_le16((OGF << 10) | BT_CMD_HOST_SLEEP_ENABLE); + cmd->length = 0; + + bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT; + + skb_put(skb, sizeof(*cmd)); + skb->dev = (void *)priv->btm_dev.hcidev; + skb_queue_head(&priv->adapter->tx_queue, skb); + + PRINTM(CMD, "Queue hs enable Command\n"); + + 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; + PRINTM(MSG, "btm_enable_hs: timeout: %d, %d,%d\n", + priv->adapter->hs_state, + priv->adapter->ps_state, + priv->adapter->wakeup_tries); + } + +exit: + LEAVE(); + + return ret; +} + +int btm_prepare_command(struct btm_private *priv) +{ + struct sk_buff *skb = NULL; + u8 ret = 0; + struct btm_cmd *cmd; + + ENTER(); + + if (priv->btm_dev.hscfgcmd) { + priv->btm_dev.hscfgcmd = 0; + + skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC); + if (skb == NULL) { + PRINTM(WARN, "No free skb\n"); + ret = -ENOMEM; + goto exit; + } + + cmd = (struct btm_cmd *) skb->tail; + cmd->ocf_ogf = cpu_to_le16((OGF << 10) | + BT_CMD_HOST_SLEEP_CONFIG); + cmd->length = 2; + cmd->data[0] = (priv->btm_dev.gpio_gap & 0xff00) >> 8; + cmd->data[1] = (u8) (priv->btm_dev.gpio_gap & 0x00ff); + + bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT; + + skb_put(skb, sizeof(*cmd)); + skb->dev = (void *)priv->btm_dev.hcidev; + skb_queue_head(&priv->adapter->tx_queue, skb); + + PRINTM(CMD, "Queue HSCFG Command, gpio=0x%x, gap=0x%x\n", + cmd->data[0], cmd->data[1]); + } + + if (priv->btm_dev.pscmd) { + priv->btm_dev.pscmd = 0; + + skb = bt_skb_alloc(sizeof(*cmd), GFP_ATOMIC); + if (skb == NULL) { + PRINTM(WARN, "No free skb\n"); + ret = -ENOMEM; + goto exit; + } + + cmd = (struct btm_cmd *) skb->tail; + cmd->ocf_ogf = cpu_to_le16((OGF << 10) | + BT_CMD_AUTO_SLEEP_MODE); + cmd->length = 1; + + if (priv->btm_dev.psmode) + cmd->data[0] = BT_PS_ENABLE; + else + cmd->data[0] = BT_PS_DISABLE; + + bt_cb(skb)->pkt_type = MRVL_VENDOR_PKT; + + skb_put(skb, sizeof(*cmd)); + skb->dev = (void *)priv->btm_dev.hcidev; + skb_queue_head(&priv->adapter->tx_queue, skb); + + PRINTM(CMD, "Queue PSMODE Command:%d\n", cmd->data[0]); + } + + if (priv->btm_dev.hscmd) { + priv->btm_dev.hscmd = 0; + + if (priv->btm_dev.hsmode) { + ret = btm_enable_hs(priv); + } else { + ret = priv->hw_wakeup_firmware(priv); + priv->adapter->hs_state = HS_DEACTIVATED; + } + } + +exit: + LEAVE(); + + return ret; +} + +static int btm_tx_pkt(struct btm_private *priv, struct sk_buff *skb) +{ + u8 ret = 0; + + ENTER(); + + if (!skb || !skb->data) { + LEAVE(); + return -EINVAL; + } + + if (!skb->len || ((skb->len + BTM_HEADER_LEN) > BT_UPLD_SIZE)) { + PRINTM(ERROR, "Tx Error: Bad skb length %d : %d\n", + skb->len, BT_UPLD_SIZE); + LEAVE(); + return -EINVAL; + } + + if (skb_headroom(skb) < BTM_HEADER_LEN) { + struct sk_buff *tmp = skb; + + skb = skb_realloc_headroom(skb, BTM_HEADER_LEN); + if (!skb) { + PRINTM(ERROR, "Tx Error: realloc_headroom failed %d\n", + BTM_HEADER_LEN); + skb = tmp; + LEAVE(); + 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); + + LEAVE(); + + return ret; +} + +static void btm_init_adapter(struct btm_private *priv) +{ + ENTER(); + + skb_queue_head_init(&priv->adapter->tx_queue); + + priv->adapter->ps_state = PS_AWAKE; + + init_waitqueue_head(&priv->adapter->cmd_wait_q); + + LEAVE(); +} + +static void btm_free_adapter(struct btm_private *priv) +{ + ENTER(); + + skb_queue_purge(&priv->adapter->tx_queue); + + kfree(priv->adapter); + + priv->adapter = NULL; + + LEAVE(); +} + +static int +btm_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg) +{ + ENTER(); + + LEAVE(); + + return -ENOIOCTLCMD; +} + +static void btm_destruct(struct hci_dev *hdev) +{ + ENTER(); + + LEAVE(); +} + +static int btm_send_frame(struct sk_buff *skb) +{ + struct hci_dev *hdev = (struct hci_dev *)skb->dev; + struct btm_private *priv = NULL; + + ENTER(); + + PRINTM(INFO, "btm_send_frame: Type=%d, len=%d\n", skb->pkt_type, + skb->len); + + DBG_HEXDUMP(DBG_DATA, "btm_send_frame", skb->data, skb->len); + + if (!hdev || !hdev->driver_data) { + PRINTM(ERROR, "Frame for unknown HCI device (hdev=NULL)\n"); + LEAVE(); + return -ENODEV; + } + + priv = (struct btm_private *)hdev->driver_data; + if (!test_bit(HCI_RUNNING, &hdev->flags)) { + PRINTM(ERROR, "Fail test HCI_RUNING,flag=%lx\n", hdev->flags); + LEAVE(); + 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); + + LEAVE(); + + return 0; +} + +static int btm_flush(struct hci_dev *hdev) +{ + struct btm_private *priv = (struct btm_private *)hdev->driver_data; + + ENTER(); + + skb_queue_purge(&priv->adapter->tx_queue); + + LEAVE(); + + return 0; +} + +static int btm_close(struct hci_dev *hdev) +{ + struct btm_private *priv = (struct btm_private *)hdev->driver_data; + + ENTER(); + + if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags)) { + LEAVE(); + return 0; + } + + skb_queue_purge(&priv->adapter->tx_queue); + + LEAVE(); + + return 0; +} + +static int btm_open(struct hci_dev *hdev) +{ + ENTER(); + + set_bit(HCI_RUNNING, &hdev->flags); + + LEAVE(); + + return 0; +} + +/* + * This function handles the event generated by firmware, rx data + * received from firmware, and tx data sent from kernel. + */ +static int btm_service_main_thread(void *data) +{ + struct btm_thread *thread = data; + struct btm_private *priv = thread->priv; + struct btm_adapter *adapter = priv->adapter; + wait_queue_t wait; + struct sk_buff *skb; + ulong flags; + + ENTER(); + + thread->pid = current->pid; + + 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->btm_dev.tx_dnld_rdy || + skb_queue_empty(&adapter->tx_queue)))) { + PRINTM(INFO, "main_thread is sleeping...\n"); + schedule(); + } + + set_current_state(TASK_RUNNING); + + remove_wait_queue(&thread->wait_q, &wait); + + PRINTM(INFO, "main_thread woke up\n"); + + if (kthread_should_stop()) { + PRINTM(INFO, "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->btm_dev.tx_dnld_rdy) + continue; + + skb = skb_dequeue(&adapter->tx_queue); + if (skb) { + if (btm_tx_pkt(priv, skb)) + priv->btm_dev.hcidev->stat.err_tx++; + else + priv->btm_dev.hcidev->stat.byte_tx += skb->len; + + kfree_skb(skb); + } + } + + thread->pid = 0; + + LEAVE(); + + return 0; +} + +struct btm_private *btm_add_card(void *card) +{ + struct hci_dev *hdev = NULL; + struct btm_private *priv = NULL; + int ret; + + ENTER(); + + priv = kzalloc(sizeof(*priv), GFP_KERNEL); + if (!priv) { + PRINTM(FATAL, "Can not allocate priv\n"); + goto err_priv; + } + + priv->adapter = kzalloc(sizeof(*priv->adapter), GFP_KERNEL); + if (!priv->adapter) { + PRINTM(FATAL, "Allocate buffer for btm_adapter failed!\n"); + goto err_adapter; + } + + btm_init_adapter(priv); + + hdev = hci_alloc_dev(); + if (!hdev) { + PRINTM(FATAL, "Can not allocate HCI device\n"); + goto err_hdev; + } + + PRINTM(INFO, "Starting kthread...\n"); + 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(btm_service_main_thread, + &priv->main_thread, "btm_main_service"); + + priv->btm_dev.hcidev = hdev; + priv->btm_dev.card = card; + + hdev->driver_data = priv; + + priv->btm_dev.tx_dnld_rdy = true; + + hdev->type = HCI_SDIO; + hdev->open = btm_open; + hdev->close = btm_close; + hdev->flush = btm_flush; + hdev->send = btm_send_frame; + hdev->destruct = btm_destruct; + hdev->ioctl = btm_ioctl; + hdev->owner = THIS_MODULE; + + ret = hci_register_dev(hdev); + if (ret < 0) { + PRINTM(FATAL, "Can not register HCI device\n"); + goto err_hci_register_dev; + } + + LEAVE(); + return priv; + +err_hci_register_dev: + /* Stop the thread servicing the interrupts */ + kthread_stop(priv->main_thread.task); + + hci_free_dev(hdev); + +err_hdev: + btm_free_adapter(priv); + +err_adapter: + kfree(priv); + +err_priv: + LEAVE(); + + return NULL; +} +EXPORT_SYMBOL_GPL(btm_add_card); + +int btm_remove_card(struct btm_private *priv) +{ + struct hci_dev *hdev; + + ENTER(); + + hdev = priv->btm_dev.hcidev; + + wake_up_interruptible(&priv->adapter->cmd_wait_q); + + kthread_stop(priv->main_thread.task); + + hci_unregister_dev(hdev); + + hci_free_dev(hdev); + + priv->btm_dev.hcidev = NULL; + + btm_free_adapter(priv); + + kfree(priv); + + LEAVE(); + + return 0; +} +EXPORT_SYMBOL_GPL(btm_remove_card); + +MODULE_AUTHOR("Marvell International Ltd."); +MODULE_DESCRIPTION("Marvell Bluetooth Driver v" VERSION); +MODULE_VERSION(VERSION); +MODULE_LICENSE("GPL v2"); -- 1.5.3.6 -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
