[PATCH v7] staging/bluetooth: Add hci_h4p driver
From: Pavel Machek
Date: Fri Jan 17 2014 - 08:29:22 EST
Add hci_h4p bluetooth driver to bluetooth-next. This device is used
for example on Nokia N900 cell phone.
Signed-off-by: Pali Rohár <pali.rohar@xxxxxxxxx>
Signed-off-by: Pavel Machek <pavel@xxxxxx>
Thanks-to: Sebastian Reichel <sre@xxxxxxxxxx>
Thanks-to: Joe Perches <joe@xxxxxxxxxxx>
---
Move it to staging, rename header file as Marcel requested. Driver
still needs too many changes to make direct merge easy, yet it is
useful for using Maemo on N900.
diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig
index 3bfdaa8..8d5af7d 100644
--- a/drivers/staging/Kconfig
+++ b/drivers/staging/Kconfig
@@ -150,4 +150,6 @@ source "drivers/staging/dgnc/Kconfig"
source "drivers/staging/dgap/Kconfig"
+source "drivers/staging/nokia_h4p/Kconfig"
+
endif # STAGING
diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile
index b0d3303..cb2991e 100644
--- a/drivers/staging/Makefile
+++ b/drivers/staging/Makefile
@@ -67,3 +67,4 @@ obj-$(CONFIG_XILLYBUS) += xillybus/
obj-$(CONFIG_DGNC) += dgnc/
obj-$(CONFIG_DGAP) += dgap/
obj-$(CONFIG_MTD_SPINAND_MT29F) += mt29f_spinand/
+obj-$(CONFIG_BT_NOKIA_H4P) += nokia_h4p/
diff --git a/drivers/staging/nokia_h4p/Kconfig b/drivers/staging/nokia_h4p/Kconfig
new file mode 100644
index 0000000..4336c0a
--- /dev/null
+++ b/drivers/staging/nokia_h4p/Kconfig
@@ -0,0 +1,9 @@
+config BT_NOKIA_H4P
+ tristate "HCI driver with H4 Nokia extensions"
+ depends on BT && ARCH_OMAP
+ help
+ Bluetooth HCI driver with H4 extensions. This driver provides
+ support for H4+ Bluetooth chip with vendor-specific H4 extensions.
+
+ Say Y here to compile support for h4 extended devices into the kernel
+ or say M to compile it as module (btnokia_h4p).
diff --git a/drivers/staging/nokia_h4p/Makefile b/drivers/staging/nokia_h4p/Makefile
new file mode 100644
index 0000000..9625db4
--- /dev/null
+++ b/drivers/staging/nokia_h4p/Makefile
@@ -0,0 +1,6 @@
+
+obj-$(CONFIG_BT_NOKIA_H4P) += btnokia_h4p.o
+btnokia_h4p-objs := nokia_core.o nokia_fw.o nokia_uart.o nokia_fw-csr.o \
+ nokia_fw-bcm.o nokia_fw-ti1273.o
+
+ccflags-y += -D__CHECK_ENDIAN__
diff --git a/drivers/staging/nokia_h4p/TODO b/drivers/staging/nokia_h4p/TODO
new file mode 100644
index 0000000..2194146
--- /dev/null
+++ b/drivers/staging/nokia_h4p/TODO
@@ -0,0 +1,140 @@
+Few attempts to submission have been made, last review comments were received in
+
+Date: Wed, 15 Jan 2014 19:01:51 -0800
+From: Marcel Holtmann <marcel@xxxxxxxxxxxx>
+Subject: Re: [PATCH v6] Bluetooth: Add hci_h4p driver
+
+Some code refactoring is still needed.
+
+TODO:
+
+> +++ b/drivers/bluetooth/hci_h4p.h
+
+can we please get the naming straight. File names do not start with
+hci_ anymore. We moved away from it since that term is too generic.
+
+> +#define FW_NAME_TI1271_LE "ti1273_le.bin"
+> +#define FW_NAME_TI1271 "ti1273.bin"
+> +#define FW_NAME_BCM2048 "bcmfw.bin"
+> +#define FW_NAME_CSR "bc4fw.bin"
+
+We do these have to be global in a header file. This should be
+confined to the specific firmware part.
+
+> +struct hci_h4p_info {
+
+Can we please get rid of the hci_ prefix for everything. Copying from
+drivers that are over 10 years old is not a good idea. Please look at
+recent ones.
+
+> + struct timer_list lazy_release;
+
+Timer? Not delayed work?
+
+> +void hci_h4p_outb(struct hci_h4p_info *info, unsigned int offset, u8 val);
+> +u8 hci_h4p_inb(struct hci_h4p_info *info, unsigned int offset);
+> +void hci_h4p_set_rts(struct hci_h4p_info *info, int active);
+> +int hci_h4p_wait_for_cts(struct hci_h4p_info *info, int active, int timeout_ms);
+> +void __hci_h4p_set_auto_ctsrts(struct hci_h4p_info *info, int on, u8 which);
+> +void hci_h4p_set_auto_ctsrts(struct hci_h4p_info *info, int on, u8 which);
+> +void hci_h4p_change_speed(struct hci_h4p_info *info, unsigned long speed);
+> +int hci_h4p_reset_uart(struct hci_h4p_info *info);
+> +void hci_h4p_init_uart(struct hci_h4p_info *info);
+> +void hci_h4p_enable_tx(struct hci_h4p_info *info);
+> +void hci_h4p_store_regs(struct hci_h4p_info *info);
+> +void hci_h4p_restore_regs(struct hci_h4p_info *info);
+> +void hci_h4p_smart_idle(struct hci_h4p_info *info, bool enable);
+
+These are a lot of public functions. Are they all really needed or can
+the code be done smart.
+
+> +static ssize_t hci_h4p_store_bdaddr(struct device *dev,
+> + struct device_attribute *attr,
+> + const char *buf, size_t count)
+> +{
+> + struct hci_h4p_info *info = dev_get_drvdata(dev);
+
+Since none of these devices can function without having a valid
+address, the way this should work is that we should not register the
+HCI device when probing the platform device.
+
+The HCI device should be registered once a valid address has been
+written into the sysfs file. I do not want to play the tricks with
+bringing up the device without a valid address.
+
+> + hdev->close = hci_h4p_hci_close;
+> + hdev->flush = hci_h4p_hci_flush;
+> + hdev->send = hci_h4p_hci_send_frame;
+
+It needs to use hdev->setup to load the firmware. I assume the
+firmware only needs to be loaded once. That is exactly what
+hdev->setup does. It gets executed once.
+
+> + set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
+
+Is this quirk really needed? Normally only Bluetooth 1.1 and early
+devices qualify for it.
+
+> +static int hci_h4p_bcm_set_bdaddr(struct hci_h4p_info *info, struct sk_buff *skb)
+> +{
+> + int i;
+> + static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
+> + int not_valid;
+
+Has this actually been confirmed that we can just randomly set an
+address out of the Nokia range. I do not think so. This is a pretty
+bad idea.
+
+I have no interest in merging a driver with such a hack.
+
+> + not_valid = 1;
+> + for (i = 0; i < 6; i++) {
+> + if (info->bd_addr[i] != 0x00) {
+> + not_valid = 0;
+> + break;
+> + }
+> + }
+
+Anybody every heard of memcmp or bacmp and BDADDR_ANY?
+
+> + if (not_valid) {
+> + dev_info(info->dev, "Valid bluetooth address not found,"
+> + " setting some random\n");
+> + /* When address is not valid, use some random */
+> + memcpy(info->bd_addr, nokia_oui, 3);
+> + get_random_bytes(info->bd_addr + 3, 3);
+> + }
+
+
+And why does every single chip firmware does this differently. Seriously, this is a mess.
+
+> +void hci_h4p_parse_fw_event(struct hci_h4p_info *info, struct sk_buff *skb)
+> +{
+> + switch (info->man_id) {
+> + case H4P_ID_CSR:
+> + hci_h4p_bc4_parse_fw_event(info, skb);
+> + break;
+...
+> +}
+
+We have proper HCI sync command handling in recent kernels. I really
+do not know why this is hand coded these days. Check how the Intel
+firmware loading inside btusb.c does it.
+
+> +inline u8 hci_h4p_inb(struct hci_h4p_info *info, unsigned int offset)
+> +{
+> + return __raw_readb(info->uart_base + (offset << 2));
+> +}
+
+Inline in a *.c file for a non-static function. Makes no sense to me.
+
+> +/**
+> + * struct hci_h4p_platform data - hci_h4p Platform data structure
+> + */
+> +struct hci_h4p_platform_data {
+
+please have a proper name here. For example
+btnokia_h4p_platform_data.
+
+Please send patches to Greg Kroah-Hartman <greg@xxxxxxxxx> and Cc:
+Pavel Machek <pavel@xxxxxx>
diff --git a/drivers/staging/nokia_h4p/hci_h4p.h b/drivers/staging/nokia_h4p/hci_h4p.h
new file mode 100644
index 0000000..fd7a640
--- /dev/null
+++ b/drivers/staging/nokia_h4p/hci_h4p.h
@@ -0,0 +1,228 @@
+/*
+ * This file is part of Nokia H4P bluetooth driver
+ *
+ * Copyright (C) 2005-2008 Nokia Corporation.
+ *
+ * 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
+ *
+ */
+
+#ifndef __DRIVERS_BLUETOOTH_HCI_H4P_H
+#define __DRIVERS_BLUETOOTH_HCI_H4P_H
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/hci.h>
+
+#define FW_NAME_TI1271_PRELE "ti1273_prele.bin"
+#define FW_NAME_TI1271_LE "ti1273_le.bin"
+#define FW_NAME_TI1271 "ti1273.bin"
+#define FW_NAME_BCM2048 "bcmfw.bin"
+#define FW_NAME_CSR "bc4fw.bin"
+
+#define UART_SYSC_OMAP_RESET 0x03
+#define UART_SYSS_RESETDONE 0x01
+#define UART_OMAP_SCR_EMPTY_THR 0x08
+#define UART_OMAP_SCR_WAKEUP 0x10
+#define UART_OMAP_SSR_WAKEUP 0x02
+#define UART_OMAP_SSR_TXFULL 0x01
+
+#define UART_OMAP_SYSC_IDLEMODE 0x03
+#define UART_OMAP_SYSC_IDLEMASK (3 << UART_OMAP_SYSC_IDLEMODE)
+
+#define UART_OMAP_SYSC_FORCE_IDLE (0 << UART_OMAP_SYSC_IDLEMODE)
+#define UART_OMAP_SYSC_NO_IDLE (1 << UART_OMAP_SYSC_IDLEMODE)
+#define UART_OMAP_SYSC_SMART_IDLE (2 << UART_OMAP_SYSC_IDLEMODE)
+
+#define H4P_TRANSFER_MODE 1
+#define H4P_SCHED_TRANSFER_MODE 2
+#define H4P_ACTIVE_MODE 3
+
+struct hci_h4p_info {
+ struct timer_list lazy_release;
+ struct hci_dev *hdev;
+ spinlock_t lock;
+
+ void __iomem *uart_base;
+ unsigned long uart_phys_base;
+ int irq;
+ struct device *dev;
+ u8 chip_type;
+ u8 bt_wakeup_gpio;
+ u8 host_wakeup_gpio;
+ u8 reset_gpio;
+ u8 reset_gpio_shared;
+ u8 bt_sysclk;
+ u8 man_id;
+ u8 ver_id;
+
+ struct sk_buff_head fw_queue;
+ struct sk_buff *alive_cmd_skb;
+ struct completion init_completion;
+ struct completion fw_completion;
+ struct completion test_completion;
+ int fw_error;
+ int init_error;
+
+ struct sk_buff_head txq;
+
+ struct sk_buff *rx_skb;
+ long rx_count;
+ unsigned long rx_state;
+ unsigned long garbage_bytes;
+
+ u8 bd_addr[6];
+ struct sk_buff_head *fw_q;
+
+ int pm_enabled;
+ int tx_enabled;
+ int autorts;
+ int rx_enabled;
+ unsigned long pm_flags;
+
+ int tx_clocks_en;
+ int rx_clocks_en;
+ spinlock_t clocks_lock;
+ struct clk *uart_iclk;
+ struct clk *uart_fclk;
+ atomic_t clk_users;
+ u16 dll;
+ u16 dlh;
+ u16 ier;
+ u16 mdr1;
+ u16 efr;
+};
+
+struct hci_h4p_radio_hdr {
+ __u8 evt;
+ __u8 dlen;
+} __attribute__ ((packed));
+
+struct hci_h4p_neg_hdr {
+ __u8 dlen;
+} __attribute__ ((packed));
+#define H4P_NEG_HDR_SIZE 1
+
+#define H4P_NEG_REQ 0x00
+#define H4P_NEG_ACK 0x20
+#define H4P_NEG_NAK 0x40
+
+#define H4P_PROTO_PKT 0x44
+#define H4P_PROTO_BYTE 0x4c
+
+#define H4P_ID_CSR 0x02
+#define H4P_ID_BCM2048 0x04
+#define H4P_ID_TI1271 0x31
+
+struct hci_h4p_neg_cmd {
+ __u8 ack;
+ __u16 baud;
+ __u16 unused1;
+ __u8 proto;
+ __u16 sys_clk;
+ __u16 unused2;
+} __attribute__ ((packed));
+
+struct hci_h4p_neg_evt {
+ __u8 ack;
+ __u16 baud;
+ __u16 unused1;
+ __u8 proto;
+ __u16 sys_clk;
+ __u16 unused2;
+ __u8 man_id;
+ __u8 ver_id;
+} __attribute__ ((packed));
+
+#define H4P_ALIVE_REQ 0x55
+#define H4P_ALIVE_RESP 0xcc
+
+struct hci_h4p_alive_hdr {
+ __u8 dlen;
+} __attribute__ ((packed));
+#define H4P_ALIVE_HDR_SIZE 1
+
+struct hci_h4p_alive_pkt {
+ __u8 mid;
+ __u8 unused;
+} __attribute__ ((packed));
+
+#define MAX_BAUD_RATE 921600
+#define BC4_MAX_BAUD_RATE 3692300
+#define UART_CLOCK 48000000
+#define BT_INIT_DIVIDER 320
+#define BT_BAUDRATE_DIVIDER 384000000
+#define BT_SYSCLK_DIV 1000
+#define INIT_SPEED 120000
+
+#define H4_TYPE_SIZE 1
+#define H4_RADIO_HDR_SIZE 2
+
+/* H4+ packet types */
+#define H4_CMD_PKT 0x01
+#define H4_ACL_PKT 0x02
+#define H4_SCO_PKT 0x03
+#define H4_EVT_PKT 0x04
+#define H4_NEG_PKT 0x06
+#define H4_ALIVE_PKT 0x07
+#define H4_RADIO_PKT 0x08
+
+/* TX states */
+#define WAIT_FOR_PKT_TYPE 1
+#define WAIT_FOR_HEADER 2
+#define WAIT_FOR_DATA 3
+
+struct hci_fw_event {
+ struct hci_event_hdr hev;
+ struct hci_ev_cmd_complete cmd;
+ u8 status;
+} __attribute__ ((packed));
+
+int hci_h4p_send_alive_packet(struct hci_h4p_info *info);
+
+void hci_h4p_bcm_parse_fw_event(struct hci_h4p_info *info,
+ struct sk_buff *skb);
+int hci_h4p_bcm_send_fw(struct hci_h4p_info *info,
+ struct sk_buff_head *fw_queue);
+
+void hci_h4p_bc4_parse_fw_event(struct hci_h4p_info *info,
+ struct sk_buff *skb);
+int hci_h4p_bc4_send_fw(struct hci_h4p_info *info,
+ struct sk_buff_head *fw_queue);
+
+void hci_h4p_ti1273_parse_fw_event(struct hci_h4p_info *info,
+ struct sk_buff *skb);
+int hci_h4p_ti1273_send_fw(struct hci_h4p_info *info,
+ struct sk_buff_head *fw_queue);
+
+int hci_h4p_read_fw(struct hci_h4p_info *info, struct sk_buff_head *fw_queue);
+int hci_h4p_send_fw(struct hci_h4p_info *info, struct sk_buff_head *fw_queue);
+void hci_h4p_parse_fw_event(struct hci_h4p_info *info, struct sk_buff *skb);
+
+void hci_h4p_outb(struct hci_h4p_info *info, unsigned int offset, u8 val);
+u8 hci_h4p_inb(struct hci_h4p_info *info, unsigned int offset);
+void hci_h4p_set_rts(struct hci_h4p_info *info, int active);
+int hci_h4p_wait_for_cts(struct hci_h4p_info *info, int active, int timeout_ms);
+void __hci_h4p_set_auto_ctsrts(struct hci_h4p_info *info, int on, u8 which);
+void hci_h4p_set_auto_ctsrts(struct hci_h4p_info *info, int on, u8 which);
+void hci_h4p_change_speed(struct hci_h4p_info *info, unsigned long speed);
+int hci_h4p_reset_uart(struct hci_h4p_info *info);
+void hci_h4p_init_uart(struct hci_h4p_info *info);
+void hci_h4p_enable_tx(struct hci_h4p_info *info);
+void hci_h4p_store_regs(struct hci_h4p_info *info);
+void hci_h4p_restore_regs(struct hci_h4p_info *info);
+void hci_h4p_smart_idle(struct hci_h4p_info *info, bool enable);
+
+#endif /* __DRIVERS_BLUETOOTH_HCI_H4P_H */
diff --git a/drivers/staging/nokia_h4p/nokia_core.c b/drivers/staging/nokia_h4p/nokia_core.c
new file mode 100644
index 0000000..5da84b0
--- /dev/null
+++ b/drivers/staging/nokia_h4p/nokia_core.c
@@ -0,0 +1,1205 @@
+/*
+ * This file is part of Nokia H4P bluetooth driver
+ *
+ * Copyright (C) 2005-2008 Nokia Corporation.
+ *
+ * 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
+ *
+ * Thanks to all the Nokia people that helped with this driver,
+ * including Ville Tervo and Roger Quadros.
+ *
+ * Power saving functionality was removed from this driver to make
+ * merging easier.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/spinlock.h>
+#include <linux/serial_reg.h>
+#include <linux/skbuff.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/interrupt.h>
+#include <linux/gpio.h>
+#include <linux/timer.h>
+#include <linux/kthread.h>
+#include <linux/io.h>
+#include <linux/completion.h>
+#include <linux/sizes.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/hci.h>
+
+#include <linux/platform_data/bt-nokia-h4p.h>
+
+#include "hci_h4p.h"
+
+/* This should be used in function that cannot release clocks */
+static void hci_h4p_set_clk(struct hci_h4p_info *info, int *clock, int enable)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->clocks_lock, flags);
+ if (enable && !*clock) {
+ BT_DBG("Enabling %p", clock);
+ clk_prepare_enable(info->uart_fclk);
+ clk_prepare_enable(info->uart_iclk);
+ if (atomic_read(&info->clk_users) == 0)
+ hci_h4p_restore_regs(info);
+ atomic_inc(&info->clk_users);
+ }
+
+ if (!enable && *clock) {
+ BT_DBG("Disabling %p", clock);
+ if (atomic_dec_and_test(&info->clk_users))
+ hci_h4p_store_regs(info);
+ clk_disable_unprepare(info->uart_fclk);
+ clk_disable_unprepare(info->uart_iclk);
+ }
+
+ *clock = enable;
+ spin_unlock_irqrestore(&info->clocks_lock, flags);
+}
+
+static void hci_h4p_lazy_clock_release(unsigned long data)
+{
+ struct hci_h4p_info *info = (struct hci_h4p_info *)data;
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->lock, flags);
+ if (!info->tx_enabled)
+ hci_h4p_set_clk(info, &info->tx_clocks_en, 0);
+ spin_unlock_irqrestore(&info->lock, flags);
+}
+
+/* Power management functions */
+void hci_h4p_smart_idle(struct hci_h4p_info *info, bool enable)
+{
+ u8 v;
+
+ v = hci_h4p_inb(info, UART_OMAP_SYSC);
+ v &= ~(UART_OMAP_SYSC_IDLEMASK);
+
+ if (enable)
+ v |= UART_OMAP_SYSC_SMART_IDLE;
+ else
+ v |= UART_OMAP_SYSC_NO_IDLE;
+
+ hci_h4p_outb(info, UART_OMAP_SYSC, v);
+}
+
+static inline void h4p_schedule_pm(struct hci_h4p_info *info)
+{
+}
+
+static void hci_h4p_disable_tx(struct hci_h4p_info *info)
+{
+ if (!info->pm_enabled)
+ return;
+
+ /* Re-enable smart-idle */
+ hci_h4p_smart_idle(info, 1);
+
+ gpio_set_value(info->bt_wakeup_gpio, 0);
+ mod_timer(&info->lazy_release, jiffies + msecs_to_jiffies(100));
+ info->tx_enabled = 0;
+}
+
+void hci_h4p_enable_tx(struct hci_h4p_info *info)
+{
+ unsigned long flags;
+
+ if (!info->pm_enabled)
+ return;
+
+ h4p_schedule_pm(info);
+
+ spin_lock_irqsave(&info->lock, flags);
+ del_timer(&info->lazy_release);
+ hci_h4p_set_clk(info, &info->tx_clocks_en, 1);
+ info->tx_enabled = 1;
+ gpio_set_value(info->bt_wakeup_gpio, 1);
+ hci_h4p_outb(info, UART_IER, hci_h4p_inb(info, UART_IER) |
+ UART_IER_THRI);
+ /*
+ * Disable smart-idle as UART TX interrupts
+ * are not wake-up capable
+ */
+ hci_h4p_smart_idle(info, 0);
+
+ spin_unlock_irqrestore(&info->lock, flags);
+}
+
+static void hci_h4p_disable_rx(struct hci_h4p_info *info)
+{
+ if (!info->pm_enabled)
+ return;
+
+ info->rx_enabled = 0;
+
+ if (hci_h4p_inb(info, UART_LSR) & UART_LSR_DR)
+ return;
+
+ if (!(hci_h4p_inb(info, UART_LSR) & UART_LSR_TEMT))
+ return;
+
+ __hci_h4p_set_auto_ctsrts(info, 0, UART_EFR_RTS);
+ info->autorts = 0;
+ hci_h4p_set_clk(info, &info->rx_clocks_en, 0);
+}
+
+static void hci_h4p_enable_rx(struct hci_h4p_info *info)
+{
+ if (!info->pm_enabled)
+ return;
+
+ h4p_schedule_pm(info);
+
+ hci_h4p_set_clk(info, &info->rx_clocks_en, 1);
+ info->rx_enabled = 1;
+
+ if (!(hci_h4p_inb(info, UART_LSR) & UART_LSR_TEMT))
+ return;
+
+ __hci_h4p_set_auto_ctsrts(info, 1, UART_EFR_RTS);
+ info->autorts = 1;
+}
+
+/* Negotiation functions */
+int hci_h4p_send_alive_packet(struct hci_h4p_info *info)
+{
+ struct hci_h4p_alive_hdr *hdr;
+ struct hci_h4p_alive_pkt *pkt;
+ struct sk_buff *skb;
+ unsigned long flags;
+ int len;
+
+ BT_DBG("Sending alive packet");
+
+ len = H4_TYPE_SIZE + sizeof(*hdr) + sizeof(*pkt);
+ skb = bt_skb_alloc(len, GFP_KERNEL);
+ if (!skb)
+ return -ENOMEM;
+
+ memset(skb->data, 0x00, len);
+ *skb_put(skb, 1) = H4_ALIVE_PKT;
+ hdr = (struct hci_h4p_alive_hdr *)skb_put(skb, sizeof(*hdr));
+ hdr->dlen = sizeof(*pkt);
+ pkt = (struct hci_h4p_alive_pkt *)skb_put(skb, sizeof(*pkt));
+ pkt->mid = H4P_ALIVE_REQ;
+
+ skb_queue_tail(&info->txq, skb);
+ spin_lock_irqsave(&info->lock, flags);
+ hci_h4p_outb(info, UART_IER, hci_h4p_inb(info, UART_IER) |
+ UART_IER_THRI);
+ spin_unlock_irqrestore(&info->lock, flags);
+
+ BT_DBG("Alive packet sent");
+
+ return 0;
+}
+
+static void hci_h4p_alive_packet(struct hci_h4p_info *info,
+ struct sk_buff *skb)
+{
+ struct hci_h4p_alive_hdr *hdr;
+ struct hci_h4p_alive_pkt *pkt;
+
+ BT_DBG("Received alive packet");
+ hdr = (struct hci_h4p_alive_hdr *)skb->data;
+ if (hdr->dlen != sizeof(*pkt)) {
+ dev_err(info->dev, "Corrupted alive message\n");
+ info->init_error = -EIO;
+ goto finish_alive;
+ }
+
+ pkt = (struct hci_h4p_alive_pkt *)skb_pull(skb, sizeof(*hdr));
+ if (pkt->mid != H4P_ALIVE_RESP) {
+ dev_err(info->dev, "Could not negotiate hci_h4p settings\n");
+ info->init_error = -EINVAL;
+ }
+
+finish_alive:
+ complete(&info->init_completion);
+ kfree_skb(skb);
+}
+
+static int hci_h4p_send_negotiation(struct hci_h4p_info *info)
+{
+ struct hci_h4p_neg_cmd *neg_cmd;
+ struct hci_h4p_neg_hdr *neg_hdr;
+ struct sk_buff *skb;
+ unsigned long flags;
+ int err, len;
+ u16 sysclk;
+
+ BT_DBG("Sending negotiation..");
+
+ switch (info->bt_sysclk) {
+ case 1:
+ sysclk = 12000;
+ break;
+ case 2:
+ sysclk = 38400;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ len = sizeof(*neg_cmd) + sizeof(*neg_hdr) + H4_TYPE_SIZE;
+ skb = bt_skb_alloc(len, GFP_KERNEL);
+ if (!skb)
+ return -ENOMEM;
+
+ memset(skb->data, 0x00, len);
+ *skb_put(skb, 1) = H4_NEG_PKT;
+ neg_hdr = (struct hci_h4p_neg_hdr *)skb_put(skb, sizeof(*neg_hdr));
+ neg_cmd = (struct hci_h4p_neg_cmd *)skb_put(skb, sizeof(*neg_cmd));
+
+ neg_hdr->dlen = sizeof(*neg_cmd);
+ neg_cmd->ack = H4P_NEG_REQ;
+ neg_cmd->baud = cpu_to_le16(BT_BAUDRATE_DIVIDER/MAX_BAUD_RATE);
+ neg_cmd->proto = H4P_PROTO_BYTE;
+ neg_cmd->sys_clk = cpu_to_le16(sysclk);
+
+ hci_h4p_change_speed(info, INIT_SPEED);
+
+ hci_h4p_set_rts(info, 1);
+ info->init_error = 0;
+ init_completion(&info->init_completion);
+ skb_queue_tail(&info->txq, skb);
+ spin_lock_irqsave(&info->lock, flags);
+ hci_h4p_outb(info, UART_IER, hci_h4p_inb(info, UART_IER) |
+ UART_IER_THRI);
+ spin_unlock_irqrestore(&info->lock, flags);
+
+ if (!wait_for_completion_interruptible_timeout(&info->init_completion,
+ msecs_to_jiffies(1000)))
+ return -ETIMEDOUT;
+
+ if (info->init_error < 0)
+ return info->init_error;
+
+ /* Change to operational settings */
+ hci_h4p_set_auto_ctsrts(info, 0, UART_EFR_RTS);
+ hci_h4p_set_rts(info, 0);
+ hci_h4p_change_speed(info, MAX_BAUD_RATE);
+
+ err = hci_h4p_wait_for_cts(info, 1, 100);
+ if (err < 0)
+ return err;
+
+ hci_h4p_set_auto_ctsrts(info, 1, UART_EFR_RTS);
+ init_completion(&info->init_completion);
+ err = hci_h4p_send_alive_packet(info);
+
+ if (err < 0)
+ return err;
+
+ if (!wait_for_completion_interruptible_timeout(&info->init_completion,
+ msecs_to_jiffies(1000)))
+ return -ETIMEDOUT;
+
+ if (info->init_error < 0)
+ return info->init_error;
+
+ BT_DBG("Negotiation successful");
+ return 0;
+}
+
+static void hci_h4p_negotiation_packet(struct hci_h4p_info *info,
+ struct sk_buff *skb)
+{
+ struct hci_h4p_neg_hdr *hdr;
+ struct hci_h4p_neg_evt *evt;
+
+ hdr = (struct hci_h4p_neg_hdr *)skb->data;
+ if (hdr->dlen != sizeof(*evt)) {
+ info->init_error = -EIO;
+ goto finish_neg;
+ }
+
+ evt = (struct hci_h4p_neg_evt *)skb_pull(skb, sizeof(*hdr));
+
+ if (evt->ack != H4P_NEG_ACK) {
+ dev_err(info->dev, "Could not negotiate hci_h4p settings\n");
+ info->init_error = -EINVAL;
+ }
+
+ info->man_id = evt->man_id;
+ info->ver_id = evt->ver_id;
+
+finish_neg:
+
+ complete(&info->init_completion);
+ kfree_skb(skb);
+}
+
+/* H4 packet handling functions */
+static int hci_h4p_get_hdr_len(struct hci_h4p_info *info, u8 pkt_type)
+{
+ long retval;
+
+ switch (pkt_type) {
+ case H4_EVT_PKT:
+ retval = HCI_EVENT_HDR_SIZE;
+ break;
+ case H4_ACL_PKT:
+ retval = HCI_ACL_HDR_SIZE;
+ break;
+ case H4_SCO_PKT:
+ retval = HCI_SCO_HDR_SIZE;
+ break;
+ case H4_NEG_PKT:
+ retval = H4P_NEG_HDR_SIZE;
+ break;
+ case H4_ALIVE_PKT:
+ retval = H4P_ALIVE_HDR_SIZE;
+ break;
+ case H4_RADIO_PKT:
+ retval = H4_RADIO_HDR_SIZE;
+ break;
+ default:
+ dev_err(info->dev, "Unknown H4 packet type 0x%.2x\n", pkt_type);
+ retval = -1;
+ break;
+ }
+
+ return retval;
+}
+
+static unsigned int hci_h4p_get_data_len(struct hci_h4p_info *info,
+ struct sk_buff *skb)
+{
+ long retval = -1;
+ struct hci_acl_hdr *acl_hdr;
+ struct hci_sco_hdr *sco_hdr;
+ struct hci_event_hdr *evt_hdr;
+ struct hci_h4p_neg_hdr *neg_hdr;
+ struct hci_h4p_alive_hdr *alive_hdr;
+ struct hci_h4p_radio_hdr *radio_hdr;
+
+ switch (bt_cb(skb)->pkt_type) {
+ case H4_EVT_PKT:
+ evt_hdr = (struct hci_event_hdr *)skb->data;
+ retval = evt_hdr->plen;
+ break;
+ case H4_ACL_PKT:
+ acl_hdr = (struct hci_acl_hdr *)skb->data;
+ retval = le16_to_cpu(acl_hdr->dlen);
+ break;
+ case H4_SCO_PKT:
+ sco_hdr = (struct hci_sco_hdr *)skb->data;
+ retval = sco_hdr->dlen;
+ break;
+ case H4_RADIO_PKT:
+ radio_hdr = (struct hci_h4p_radio_hdr *)skb->data;
+ retval = radio_hdr->dlen;
+ break;
+ case H4_NEG_PKT:
+ neg_hdr = (struct hci_h4p_neg_hdr *)skb->data;
+ retval = neg_hdr->dlen;
+ break;
+ case H4_ALIVE_PKT:
+ alive_hdr = (struct hci_h4p_alive_hdr *)skb->data;
+ retval = alive_hdr->dlen;
+ break;
+ }
+
+ return retval;
+}
+
+static inline void hci_h4p_recv_frame(struct hci_h4p_info *info,
+ struct sk_buff *skb)
+{
+ if (unlikely(!test_bit(HCI_RUNNING, &info->hdev->flags))) {
+ switch (bt_cb(skb)->pkt_type) {
+ case H4_NEG_PKT:
+ hci_h4p_negotiation_packet(info, skb);
+ info->rx_state = WAIT_FOR_PKT_TYPE;
+ return;
+ case H4_ALIVE_PKT:
+ hci_h4p_alive_packet(info, skb);
+ info->rx_state = WAIT_FOR_PKT_TYPE;
+ return;
+ }
+
+ if (!test_bit(HCI_UP, &info->hdev->flags)) {
+ BT_DBG("fw_event");
+ hci_h4p_parse_fw_event(info, skb);
+ return;
+ }
+ }
+
+ hci_recv_frame(info->hdev, skb);
+ BT_DBG("Frame sent to upper layer");
+}
+
+static inline void hci_h4p_handle_byte(struct hci_h4p_info *info, u8 byte)
+{
+ switch (info->rx_state) {
+ case WAIT_FOR_PKT_TYPE:
+ bt_cb(info->rx_skb)->pkt_type = byte;
+ info->rx_count = hci_h4p_get_hdr_len(info, byte);
+ if (info->rx_count < 0) {
+ info->hdev->stat.err_rx++;
+ kfree_skb(info->rx_skb);
+ info->rx_skb = NULL;
+ } else {
+ info->rx_state = WAIT_FOR_HEADER;
+ }
+ break;
+ case WAIT_FOR_HEADER:
+ info->rx_count--;
+ *skb_put(info->rx_skb, 1) = byte;
+ if (info->rx_count != 0)
+ break;
+ info->rx_count = hci_h4p_get_data_len(info, info->rx_skb);
+ if (info->rx_count > skb_tailroom(info->rx_skb)) {
+ dev_err(info->dev, "frame too long\n");
+ info->garbage_bytes = info->rx_count
+ - skb_tailroom(info->rx_skb);
+ kfree_skb(info->rx_skb);
+ info->rx_skb = NULL;
+ break;
+ }
+ info->rx_state = WAIT_FOR_DATA;
+ break;
+ case WAIT_FOR_DATA:
+ info->rx_count--;
+ *skb_put(info->rx_skb, 1) = byte;
+ break;
+ default:
+ WARN_ON(1);
+ break;
+ }
+
+ if (info->rx_count == 0) {
+ /* H4+ devices should always send word aligned packets */
+ if (!(info->rx_skb->len % 2))
+ info->garbage_bytes++;
+ hci_h4p_recv_frame(info, info->rx_skb);
+ info->rx_skb = NULL;
+ }
+}
+
+static void hci_h4p_rx_tasklet(unsigned long data)
+{
+ u8 byte;
+ struct hci_h4p_info *info = (struct hci_h4p_info *)data;
+
+ BT_DBG("tasklet woke up");
+ BT_DBG("rx_tasklet woke up");
+
+ while (hci_h4p_inb(info, UART_LSR) & UART_LSR_DR) {
+ byte = hci_h4p_inb(info, UART_RX);
+ if (info->garbage_bytes) {
+ info->garbage_bytes--;
+ continue;
+ }
+ if (info->rx_skb == NULL) {
+ info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE,
+ GFP_ATOMIC | GFP_DMA);
+ if (!info->rx_skb) {
+ dev_err(info->dev,
+ "No memory for new packet\n");
+ goto finish_rx;
+ }
+ info->rx_state = WAIT_FOR_PKT_TYPE;
+ info->rx_skb->dev = (void *)info->hdev;
+ }
+ info->hdev->stat.byte_rx++;
+ hci_h4p_handle_byte(info, byte);
+ }
+
+ if (!info->rx_enabled) {
+ if (hci_h4p_inb(info, UART_LSR) & UART_LSR_TEMT &&
+ info->autorts) {
+ __hci_h4p_set_auto_ctsrts(info, 0 , UART_EFR_RTS);
+ info->autorts = 0;
+ }
+ /* Flush posted write to avoid spurious interrupts */
+ hci_h4p_inb(info, UART_OMAP_SCR);
+ hci_h4p_set_clk(info, &info->rx_clocks_en, 0);
+ }
+
+finish_rx:
+ BT_DBG("rx_ended");
+}
+
+static void hci_h4p_tx_tasklet(unsigned long data)
+{
+ unsigned int sent = 0;
+ struct sk_buff *skb;
+ struct hci_h4p_info *info = (struct hci_h4p_info *)data;
+
+ BT_DBG("tasklet woke up");
+ BT_DBG("tx_tasklet woke up");
+
+ if (info->autorts != info->rx_enabled) {
+ if (hci_h4p_inb(info, UART_LSR) & UART_LSR_TEMT) {
+ if (info->autorts && !info->rx_enabled) {
+ __hci_h4p_set_auto_ctsrts(info, 0,
+ UART_EFR_RTS);
+ info->autorts = 0;
+ }
+ if (!info->autorts && info->rx_enabled) {
+ __hci_h4p_set_auto_ctsrts(info, 1,
+ UART_EFR_RTS);
+ info->autorts = 1;
+ }
+ } else {
+ hci_h4p_outb(info, UART_OMAP_SCR,
+ hci_h4p_inb(info, UART_OMAP_SCR) |
+ UART_OMAP_SCR_EMPTY_THR);
+ goto finish_tx;
+ }
+ }
+
+ skb = skb_dequeue(&info->txq);
+ if (!skb) {
+ /* No data in buffer */
+ BT_DBG("skb ready");
+ if (hci_h4p_inb(info, UART_LSR) & UART_LSR_TEMT) {
+ hci_h4p_outb(info, UART_IER,
+ hci_h4p_inb(info, UART_IER) &
+ ~UART_IER_THRI);
+ hci_h4p_inb(info, UART_OMAP_SCR);
+ hci_h4p_disable_tx(info);
+ return;
+ }
+ hci_h4p_outb(info, UART_OMAP_SCR,
+ hci_h4p_inb(info, UART_OMAP_SCR) |
+ UART_OMAP_SCR_EMPTY_THR);
+ goto finish_tx;
+ }
+
+ /* Copy data to tx fifo */
+ while (!(hci_h4p_inb(info, UART_OMAP_SSR) & UART_OMAP_SSR_TXFULL) &&
+ (sent < skb->len)) {
+ hci_h4p_outb(info, UART_TX, skb->data[sent]);
+ sent++;
+ }
+
+ info->hdev->stat.byte_tx += sent;
+ if (skb->len == sent) {
+ kfree_skb(skb);
+ } else {
+ skb_pull(skb, sent);
+ skb_queue_head(&info->txq, skb);
+ }
+
+ hci_h4p_outb(info, UART_OMAP_SCR, hci_h4p_inb(info, UART_OMAP_SCR) &
+ ~UART_OMAP_SCR_EMPTY_THR);
+ hci_h4p_outb(info, UART_IER, hci_h4p_inb(info, UART_IER) |
+ UART_IER_THRI);
+
+finish_tx:
+ /* Flush posted write to avoid spurious interrupts */
+ hci_h4p_inb(info, UART_OMAP_SCR);
+
+}
+
+static irqreturn_t hci_h4p_interrupt(int irq, void *data)
+{
+ struct hci_h4p_info *info = (struct hci_h4p_info *)data;
+ u8 iir, msr;
+ int ret;
+
+ ret = IRQ_NONE;
+
+ iir = hci_h4p_inb(info, UART_IIR);
+ if (iir & UART_IIR_NO_INT)
+ return IRQ_HANDLED;
+
+ BT_DBG("In interrupt handler iir 0x%.2x", iir);
+
+ iir &= UART_IIR_ID;
+
+ if (iir == UART_IIR_MSI) {
+ msr = hci_h4p_inb(info, UART_MSR);
+ ret = IRQ_HANDLED;
+ }
+ if (iir == UART_IIR_RLSI) {
+ hci_h4p_inb(info, UART_RX);
+ hci_h4p_inb(info, UART_LSR);
+ ret = IRQ_HANDLED;
+ }
+
+ if (iir == UART_IIR_RDI) {
+ hci_h4p_rx_tasklet((unsigned long)data);
+ ret = IRQ_HANDLED;
+ }
+
+ if (iir == UART_IIR_THRI) {
+ hci_h4p_tx_tasklet((unsigned long)data);
+ ret = IRQ_HANDLED;
+ }
+
+ return ret;
+}
+
+static irqreturn_t hci_h4p_wakeup_interrupt(int irq, void *dev_inst)
+{
+ struct hci_h4p_info *info = dev_inst;
+ int should_wakeup;
+ struct hci_dev *hdev;
+
+ if (!info->hdev)
+ return IRQ_HANDLED;
+
+ should_wakeup = gpio_get_value(info->host_wakeup_gpio);
+ hdev = info->hdev;
+
+ if (!test_bit(HCI_RUNNING, &hdev->flags)) {
+ if (should_wakeup == 1)
+ complete_all(&info->test_completion);
+
+ return IRQ_HANDLED;
+ }
+
+ BT_DBG("gpio interrupt %d", should_wakeup);
+
+ /* Check if wee have missed some interrupts */
+ if (info->rx_enabled == should_wakeup)
+ return IRQ_HANDLED;
+
+ if (should_wakeup)
+ hci_h4p_enable_rx(info);
+ else
+ hci_h4p_disable_rx(info);
+
+ return IRQ_HANDLED;
+}
+
+static inline void hci_h4p_set_pm_limits(struct hci_h4p_info *info, bool set)
+{
+ struct hci_h4p_platform_data *bt_plat_data = info->dev->platform_data;
+ const char *sset = set ? "set" : "clear";
+
+ if (unlikely(!bt_plat_data || !bt_plat_data->set_pm_limits))
+ return;
+
+ if (set != !!test_bit(H4P_ACTIVE_MODE, &info->pm_flags)) {
+ bt_plat_data->set_pm_limits(info->dev, set);
+ if (set)
+ set_bit(H4P_ACTIVE_MODE, &info->pm_flags);
+ else
+ clear_bit(H4P_ACTIVE_MODE, &info->pm_flags);
+ BT_DBG("Change pm constraints to: %s", sset);
+ return;
+ }
+
+ BT_DBG("pm constraints remains: %s", sset);
+}
+
+static int hci_h4p_reset(struct hci_h4p_info *info)
+{
+ int err;
+
+ err = hci_h4p_reset_uart(info);
+ if (err < 0) {
+ dev_err(info->dev, "Uart reset failed\n");
+ return err;
+ }
+ hci_h4p_init_uart(info);
+ hci_h4p_set_rts(info, 0);
+
+ gpio_set_value(info->reset_gpio, 0);
+ gpio_set_value(info->bt_wakeup_gpio, 1);
+ msleep(10);
+
+ if (gpio_get_value(info->host_wakeup_gpio) == 1) {
+ dev_err(info->dev, "host_wakeup_gpio not low\n");
+ return -EPROTO;
+ }
+
+ init_completion(&info->test_completion);
+ gpio_set_value(info->reset_gpio, 1);
+
+ if (!wait_for_completion_interruptible_timeout(&info->test_completion,
+ msecs_to_jiffies(100))) {
+ dev_err(info->dev, "wakeup test timed out\n");
+ complete_all(&info->test_completion);
+ return -EPROTO;
+ }
+
+ err = hci_h4p_wait_for_cts(info, 1, 100);
+ if (err < 0) {
+ dev_err(info->dev, "No cts from bt chip\n");
+ return err;
+ }
+
+ hci_h4p_set_rts(info, 1);
+
+ return 0;
+}
+
+/* hci callback functions */
+static int hci_h4p_hci_flush(struct hci_dev *hdev)
+{
+ struct hci_h4p_info *info = hci_get_drvdata(hdev);
+ skb_queue_purge(&info->txq);
+
+ return 0;
+}
+
+static int hci_h4p_bt_wakeup_test(struct hci_h4p_info *info)
+{
+ /*
+ * Test Sequence:
+ * Host de-asserts the BT_WAKE_UP line.
+ * Host polls the UART_CTS line, waiting for it to be de-asserted.
+ * Host asserts the BT_WAKE_UP line.
+ * Host polls the UART_CTS line, waiting for it to be asserted.
+ * Host de-asserts the BT_WAKE_UP line (allow the Bluetooth device to
+ * sleep).
+ * Host polls the UART_CTS line, waiting for it to be de-asserted.
+ */
+ int err;
+ int ret = -ECOMM;
+
+ if (!info)
+ return -EINVAL;
+
+ /* Disable wakeup interrupts */
+ disable_irq(gpio_to_irq(info->host_wakeup_gpio));
+
+ gpio_set_value(info->bt_wakeup_gpio, 0);
+ err = hci_h4p_wait_for_cts(info, 0, 100);
+ if (err) {
+ dev_warn(info->dev, "bt_wakeup_test: fail: "
+ "CTS low timed out: %d\n", err);
+ goto out;
+ }
+
+ gpio_set_value(info->bt_wakeup_gpio, 1);
+ err = hci_h4p_wait_for_cts(info, 1, 100);
+ if (err) {
+ dev_warn(info->dev, "bt_wakeup_test: fail: "
+ "CTS high timed out: %d\n", err);
+ goto out;
+ }
+
+ gpio_set_value(info->bt_wakeup_gpio, 0);
+ err = hci_h4p_wait_for_cts(info, 0, 100);
+ if (err) {
+ dev_warn(info->dev, "bt_wakeup_test: fail: "
+ "CTS re-low timed out: %d\n", err);
+ goto out;
+ }
+
+ ret = 0;
+
+out:
+
+ /* Re-enable wakeup interrupts */
+ enable_irq(gpio_to_irq(info->host_wakeup_gpio));
+
+ return ret;
+}
+
+static int hci_h4p_hci_open(struct hci_dev *hdev)
+{
+ struct hci_h4p_info *info;
+ int err, retries = 0;
+ struct sk_buff_head fw_queue;
+ unsigned long flags;
+
+ info = hci_get_drvdata(hdev);
+
+ if (test_bit(HCI_RUNNING, &hdev->flags))
+ return 0;
+
+ /* TI1271 has HW bug and boot up might fail. Retry up to three times */
+again:
+
+ info->rx_enabled = 1;
+ info->rx_state = WAIT_FOR_PKT_TYPE;
+ info->rx_count = 0;
+ info->garbage_bytes = 0;
+ info->rx_skb = NULL;
+ info->pm_enabled = 0;
+ init_completion(&info->fw_completion);
+ hci_h4p_set_clk(info, &info->tx_clocks_en, 1);
+ hci_h4p_set_clk(info, &info->rx_clocks_en, 1);
+ skb_queue_head_init(&fw_queue);
+
+ err = hci_h4p_reset(info);
+ if (err < 0)
+ goto err_clean;
+
+ hci_h4p_set_auto_ctsrts(info, 1, UART_EFR_CTS | UART_EFR_RTS);
+ info->autorts = 1;
+
+ err = hci_h4p_send_negotiation(info);
+
+ err = hci_h4p_read_fw(info, &fw_queue);
+ if (err < 0) {
+ dev_err(info->dev, "Cannot read firmware\n");
+ goto err_clean;
+ }
+
+ err = hci_h4p_send_fw(info, &fw_queue);
+ if (err < 0) {
+ dev_err(info->dev, "Sending firmware failed.\n");
+ goto err_clean;
+ }
+
+ info->pm_enabled = 1;
+
+ err = hci_h4p_bt_wakeup_test(info);
+ if (err < 0) {
+ dev_err(info->dev, "BT wakeup test failed.\n");
+ goto err_clean;
+ }
+
+ spin_lock_irqsave(&info->lock, flags);
+ info->rx_enabled = gpio_get_value(info->host_wakeup_gpio);
+ hci_h4p_set_clk(info, &info->rx_clocks_en, info->rx_enabled);
+ spin_unlock_irqrestore(&info->lock, flags);
+
+ hci_h4p_set_clk(info, &info->tx_clocks_en, 0);
+
+ kfree_skb(info->alive_cmd_skb);
+ info->alive_cmd_skb = NULL;
+ set_bit(HCI_RUNNING, &hdev->flags);
+
+ BT_DBG("hci up and running");
+ return 0;
+
+err_clean:
+ hci_h4p_hci_flush(hdev);
+ hci_h4p_reset_uart(info);
+ del_timer_sync(&info->lazy_release);
+ hci_h4p_set_clk(info, &info->tx_clocks_en, 0);
+ hci_h4p_set_clk(info, &info->rx_clocks_en, 0);
+ gpio_set_value(info->reset_gpio, 0);
+ gpio_set_value(info->bt_wakeup_gpio, 0);
+ skb_queue_purge(&fw_queue);
+ kfree_skb(info->alive_cmd_skb);
+ info->alive_cmd_skb = NULL;
+ kfree_skb(info->rx_skb);
+ info->rx_skb = NULL;
+
+ if (retries++ < 3) {
+ dev_err(info->dev, "FW loading try %d fail. Retry.\n", retries);
+ goto again;
+ }
+
+ return err;
+}
+
+static int hci_h4p_hci_close(struct hci_dev *hdev)
+{
+ struct hci_h4p_info *info = hci_get_drvdata(hdev);
+
+ if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
+ return 0;
+
+ hci_h4p_hci_flush(hdev);
+ hci_h4p_set_clk(info, &info->tx_clocks_en, 1);
+ hci_h4p_set_clk(info, &info->rx_clocks_en, 1);
+ hci_h4p_reset_uart(info);
+ del_timer_sync(&info->lazy_release);
+ hci_h4p_set_clk(info, &info->tx_clocks_en, 0);
+ hci_h4p_set_clk(info, &info->rx_clocks_en, 0);
+ gpio_set_value(info->reset_gpio, 0);
+ gpio_set_value(info->bt_wakeup_gpio, 0);
+ kfree_skb(info->rx_skb);
+
+ return 0;
+}
+
+static int hci_h4p_hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
+{
+ struct hci_h4p_info *info;
+ int err = 0;
+
+ BT_DBG("dev %p, skb %p", hdev, skb);
+
+ info = hci_get_drvdata(hdev);
+
+ if (!test_bit(HCI_RUNNING, &hdev->flags)) {
+ dev_warn(info->dev, "Frame for non-running device\n");
+ return -EIO;
+ }
+
+ 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;
+ }
+
+ /* Push frame type to skb */
+ *skb_push(skb, 1) = (bt_cb(skb)->pkt_type);
+ /* We should allways send word aligned data to h4+ devices */
+ if (skb->len % 2) {
+ err = skb_pad(skb, 1);
+ if (!err)
+ *skb_put(skb, 1) = 0x00;
+ }
+ if (err)
+ return err;
+
+ skb_queue_tail(&info->txq, skb);
+ hci_h4p_enable_tx(info);
+
+ return 0;
+}
+
+static ssize_t hci_h4p_store_bdaddr(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct hci_h4p_info *info = dev_get_drvdata(dev);
+ unsigned int bdaddr[6];
+ int ret, i;
+
+ ret = sscanf(buf, "%2x:%2x:%2x:%2x:%2x:%2x\n",
+ &bdaddr[0], &bdaddr[1], &bdaddr[2],
+ &bdaddr[3], &bdaddr[4], &bdaddr[5]);
+
+ if (ret != 6)
+ return -EINVAL;
+
+ for (i = 0; i < 6; i++) {
+ if (bdaddr[i] > 0xff)
+ return -EINVAL;
+ info->bd_addr[i] = bdaddr[i] & 0xff;
+ }
+
+ return count;
+}
+
+static ssize_t hci_h4p_show_bdaddr(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct hci_h4p_info *info = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%pMR\n", info->bd_addr);
+}
+
+static DEVICE_ATTR(bdaddr, S_IRUGO | S_IWUSR, hci_h4p_show_bdaddr,
+ hci_h4p_store_bdaddr);
+
+static int hci_h4p_sysfs_create_files(struct device *dev)
+{
+ return device_create_file(dev, &dev_attr_bdaddr);
+}
+
+static void hci_h4p_sysfs_remove_files(struct device *dev)
+{
+ device_remove_file(dev, &dev_attr_bdaddr);
+}
+
+static int hci_h4p_register_hdev(struct hci_h4p_info *info)
+{
+ struct hci_dev *hdev;
+
+ /* Initialize and register HCI device */
+
+ hdev = hci_alloc_dev();
+ if (!hdev) {
+ dev_err(info->dev, "Can't allocate memory for device\n");
+ return -ENOMEM;
+ }
+ info->hdev = hdev;
+
+ hdev->bus = HCI_UART;
+ hci_set_drvdata(hdev, info);
+
+ hdev->open = hci_h4p_hci_open;
+ hdev->close = hci_h4p_hci_close;
+ hdev->flush = hci_h4p_hci_flush;
+ hdev->send = hci_h4p_hci_send_frame;
+ set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
+
+ SET_HCIDEV_DEV(hdev, info->dev);
+
+ if (hci_h4p_sysfs_create_files(info->dev) < 0) {
+ dev_err(info->dev, "failed to create sysfs files\n");
+ goto free;
+ }
+
+ if (hci_register_dev(hdev) >= 0)
+ return 0;
+
+ dev_err(info->dev, "hci_register failed %s.\n", hdev->name);
+ hci_h4p_sysfs_remove_files(info->dev);
+free:
+ hci_free_dev(info->hdev);
+ return -ENODEV;
+}
+
+static int hci_h4p_probe(struct platform_device *pdev)
+{
+ struct hci_h4p_platform_data *bt_plat_data;
+ struct hci_h4p_info *info;
+ int err;
+
+ dev_info(&pdev->dev, "Registering HCI H4P device\n");
+ info = devm_kzalloc(&pdev->dev, sizeof(struct hci_h4p_info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ info->dev = &pdev->dev;
+ info->tx_enabled = 1;
+ info->rx_enabled = 1;
+ spin_lock_init(&info->lock);
+ spin_lock_init(&info->clocks_lock);
+ skb_queue_head_init(&info->txq);
+
+ if (pdev->dev.platform_data == NULL) {
+ dev_err(&pdev->dev, "Could not get Bluetooth config data\n");
+ return -ENODATA;
+ }
+
+ bt_plat_data = pdev->dev.platform_data;
+ info->chip_type = bt_plat_data->chip_type;
+ info->bt_wakeup_gpio = bt_plat_data->bt_wakeup_gpio;
+ info->host_wakeup_gpio = bt_plat_data->host_wakeup_gpio;
+ info->reset_gpio = bt_plat_data->reset_gpio;
+ info->reset_gpio_shared = bt_plat_data->reset_gpio_shared;
+ info->bt_sysclk = bt_plat_data->bt_sysclk;
+
+ BT_DBG("RESET gpio: %d", info->reset_gpio);
+ BT_DBG("BTWU gpio: %d", info->bt_wakeup_gpio);
+ BT_DBG("HOSTWU gpio: %d", info->host_wakeup_gpio);
+ BT_DBG("sysclk: %d", info->bt_sysclk);
+
+ init_completion(&info->test_completion);
+ complete_all(&info->test_completion);
+
+ if (!info->reset_gpio_shared) {
+ err = devm_gpio_request_one(&pdev->dev, info->reset_gpio,
+ GPIOF_OUT_INIT_LOW, "bt_reset");
+ if (err < 0) {
+ dev_err(&pdev->dev, "Cannot get GPIO line %d\n",
+ info->reset_gpio);
+ return err;
+ }
+ }
+
+ err = devm_gpio_request_one(&pdev->dev, info->bt_wakeup_gpio,
+ GPIOF_OUT_INIT_LOW, "bt_wakeup");
+
+ if (err < 0) {
+ dev_err(info->dev, "Cannot get GPIO line 0x%d",
+ info->bt_wakeup_gpio);
+ return err;
+ }
+
+ err = devm_gpio_request_one(&pdev->dev, info->host_wakeup_gpio,
+ GPIOF_DIR_IN, "host_wakeup");
+ if (err < 0) {
+ dev_err(info->dev, "Cannot get GPIO line %d",
+ info->host_wakeup_gpio);
+ return err;
+ }
+
+ info->irq = bt_plat_data->uart_irq;
+ info->uart_base = devm_ioremap(&pdev->dev, bt_plat_data->uart_base, SZ_2K);
+ info->uart_iclk = devm_clk_get(&pdev->dev, bt_plat_data->uart_iclk);
+ info->uart_fclk = devm_clk_get(&pdev->dev, bt_plat_data->uart_fclk);
+
+ err = devm_request_irq(&pdev->dev, info->irq, hci_h4p_interrupt, IRQF_DISABLED,
+ "hci_h4p", info);
+ if (err < 0) {
+ dev_err(info->dev, "hci_h4p: unable to get IRQ %d\n", info->irq);
+ return err;
+ }
+
+ err = devm_request_irq(&pdev->dev, gpio_to_irq(info->host_wakeup_gpio),
+ hci_h4p_wakeup_interrupt, IRQF_TRIGGER_FALLING |
+ IRQF_TRIGGER_RISING | IRQF_DISABLED,
+ "hci_h4p_wkup", info);
+ if (err < 0) {
+ dev_err(info->dev, "hci_h4p: unable to get wakeup IRQ %d\n",
+ gpio_to_irq(info->host_wakeup_gpio));
+ return err;
+ }
+
+ err = irq_set_irq_wake(gpio_to_irq(info->host_wakeup_gpio), 1);
+ if (err < 0) {
+ dev_err(info->dev, "hci_h4p: unable to set wakeup for IRQ %d\n",
+ gpio_to_irq(info->host_wakeup_gpio));
+ return err;
+ }
+
+ init_timer_deferrable(&info->lazy_release);
+ info->lazy_release.function = hci_h4p_lazy_clock_release;
+ info->lazy_release.data = (unsigned long)info;
+ hci_h4p_set_clk(info, &info->tx_clocks_en, 1);
+ err = hci_h4p_reset_uart(info);
+ if (err < 0)
+ return err;
+ gpio_set_value(info->reset_gpio, 0);
+ hci_h4p_set_clk(info, &info->tx_clocks_en, 0);
+
+ platform_set_drvdata(pdev, info);
+
+ if (hci_h4p_register_hdev(info) < 0) {
+ dev_err(info->dev, "failed to register hci_h4p hci device\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int hci_h4p_remove(struct platform_device *pdev)
+{
+ struct hci_h4p_info *info;
+
+ info = platform_get_drvdata(pdev);
+
+ hci_h4p_sysfs_remove_files(info->dev);
+ hci_h4p_hci_close(info->hdev);
+ hci_unregister_dev(info->hdev);
+ hci_free_dev(info->hdev);
+
+ return 0;
+}
+
+static struct platform_driver hci_h4p_driver = {
+ .probe = hci_h4p_probe,
+ .remove = hci_h4p_remove,
+ .driver = {
+ .name = "hci_h4p",
+ },
+};
+
+module_platform_driver(hci_h4p_driver);
+
+MODULE_ALIAS("platform:hci_h4p");
+MODULE_DESCRIPTION("Bluetooth h4 driver with nokia extensions");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Ville Tervo");
+MODULE_FIRMWARE(FW_NAME_TI1271_PRELE);
+MODULE_FIRMWARE(FW_NAME_TI1271_LE);
+MODULE_FIRMWARE(FW_NAME_TI1271);
+MODULE_FIRMWARE(FW_NAME_BCM2048);
+MODULE_FIRMWARE(FW_NAME_CSR);
diff --git a/drivers/staging/nokia_h4p/nokia_fw-bcm.c b/drivers/staging/nokia_h4p/nokia_fw-bcm.c
new file mode 100644
index 0000000..e8912bf
--- /dev/null
+++ b/drivers/staging/nokia_h4p/nokia_fw-bcm.c
@@ -0,0 +1,147 @@
+/*
+ * This file is part of Nokia H4P bluetooth driver
+ *
+ * Copyright (C) 2005-2008 Nokia Corporation.
+ *
+ * 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 <linux/skbuff.h>
+#include <linux/delay.h>
+#include <linux/serial_reg.h>
+
+#include "hci_h4p.h"
+
+static int hci_h4p_bcm_set_bdaddr(struct hci_h4p_info *info, struct sk_buff *skb)
+{
+ int i;
+ static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
+ int not_valid;
+
+ not_valid = 1;
+ for (i = 0; i < 6; i++) {
+ if (info->bd_addr[i] != 0x00) {
+ not_valid = 0;
+ break;
+ }
+ }
+
+ if (not_valid) {
+ dev_info(info->dev, "Valid bluetooth address not found, setting some random\n");
+ /* When address is not valid, use some random but Nokia MAC */
+ memcpy(info->bd_addr, nokia_oui, 3);
+ get_random_bytes(info->bd_addr + 3, 3);
+ }
+
+ for (i = 0; i < 6; i++)
+ skb->data[9 - i] = info->bd_addr[i];
+
+ return 0;
+}
+
+void hci_h4p_bcm_parse_fw_event(struct hci_h4p_info *info, struct sk_buff *skb)
+{
+ struct sk_buff *fw_skb;
+ int err;
+ unsigned long flags;
+
+ if (skb->data[5] != 0x00) {
+ dev_err(info->dev, "Firmware sending command failed 0x%.2x\n",
+ skb->data[5]);
+ info->fw_error = -EPROTO;
+ }
+
+ kfree_skb(skb);
+
+ fw_skb = skb_dequeue(info->fw_q);
+ if (fw_skb == NULL || info->fw_error) {
+ complete(&info->fw_completion);
+ return;
+ }
+
+ if (fw_skb->data[1] == 0x01 && fw_skb->data[2] == 0xfc && fw_skb->len >= 10) {
+ BT_DBG("Setting bluetooth address");
+ err = hci_h4p_bcm_set_bdaddr(info, fw_skb);
+ if (err < 0) {
+ kfree_skb(fw_skb);
+ info->fw_error = err;
+ complete(&info->fw_completion);
+ return;
+ }
+ }
+
+ skb_queue_tail(&info->txq, fw_skb);
+ spin_lock_irqsave(&info->lock, flags);
+ hci_h4p_outb(info, UART_IER, hci_h4p_inb(info, UART_IER) |
+ UART_IER_THRI);
+ spin_unlock_irqrestore(&info->lock, flags);
+}
+
+
+int hci_h4p_bcm_send_fw(struct hci_h4p_info *info,
+ struct sk_buff_head *fw_queue)
+{
+ struct sk_buff *skb;
+ unsigned long flags, time;
+
+ info->fw_error = 0;
+
+ BT_DBG("Sending firmware");
+
+ time = jiffies;
+
+ info->fw_q = fw_queue;
+ skb = skb_dequeue(fw_queue);
+ if (!skb)
+ return -ENODATA;
+
+ BT_DBG("Sending commands");
+
+ /*
+ * Disable smart-idle as UART TX interrupts
+ * are not wake-up capable
+ */
+ hci_h4p_smart_idle(info, 0);
+
+ /* Check if this is bd_address packet */
+ init_completion(&info->fw_completion);
+ skb_queue_tail(&info->txq, skb);
+ spin_lock_irqsave(&info->lock, flags);
+ hci_h4p_outb(info, UART_IER, hci_h4p_inb(info, UART_IER) |
+ UART_IER_THRI);
+ spin_unlock_irqrestore(&info->lock, flags);
+
+ if (!wait_for_completion_timeout(&info->fw_completion,
+ msecs_to_jiffies(2000))) {
+ dev_err(info->dev, "No reply to fw command\n");
+ return -ETIMEDOUT;
+ }
+
+ if (info->fw_error) {
+ dev_err(info->dev, "FW error\n");
+ return -EPROTO;
+ }
+
+ BT_DBG("Firmware sent in %d msecs",
+ jiffies_to_msecs(jiffies-time));
+
+ hci_h4p_set_auto_ctsrts(info, 0, UART_EFR_RTS);
+ hci_h4p_set_rts(info, 0);
+ hci_h4p_change_speed(info, BC4_MAX_BAUD_RATE);
+ hci_h4p_set_auto_ctsrts(info, 1, UART_EFR_RTS);
+
+ return 0;
+}
diff --git a/drivers/staging/nokia_h4p/nokia_fw-csr.c b/drivers/staging/nokia_h4p/nokia_fw-csr.c
new file mode 100644
index 0000000..e39c4a3
--- /dev/null
+++ b/drivers/staging/nokia_h4p/nokia_fw-csr.c
@@ -0,0 +1,150 @@
+/*
+ * This file is part of Nokia H4P bluetooth driver
+ *
+ * Copyright (C) 2005-2008 Nokia Corporation.
+ *
+ * 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 <linux/skbuff.h>
+#include <linux/delay.h>
+#include <linux/serial_reg.h>
+
+#include "hci_h4p.h"
+
+void hci_h4p_bc4_parse_fw_event(struct hci_h4p_info *info, struct sk_buff *skb)
+{
+ /* Check if this is fw packet */
+ if (skb->data[0] != 0xff) {
+ hci_recv_frame(info->hdev, skb);
+ return;
+ }
+
+ if (skb->data[11] || skb->data[12]) {
+ dev_err(info->dev, "Firmware sending command failed\n");
+ info->fw_error = -EPROTO;
+ }
+
+ kfree_skb(skb);
+ complete(&info->fw_completion);
+}
+
+int hci_h4p_bc4_send_fw(struct hci_h4p_info *info,
+ struct sk_buff_head *fw_queue)
+{
+ static const u8 nokia_oui[3] = {0x00, 0x19, 0x4F};
+ struct sk_buff *skb;
+ unsigned int offset;
+ int retries, count, i, not_valid;
+ unsigned long flags;
+
+ info->fw_error = 0;
+
+ BT_DBG("Sending firmware");
+ skb = skb_dequeue(fw_queue);
+
+ if (!skb)
+ return -ENOMSG;
+
+ /* Check if this is bd_address packet */
+ if (skb->data[15] == 0x01 && skb->data[16] == 0x00) {
+ offset = 21;
+ skb->data[offset + 1] = 0x00;
+ skb->data[offset + 5] = 0x00;
+
+ not_valid = 1;
+ for (i = 0; i < 6; i++) {
+ if (info->bd_addr[i] != 0x00) {
+ not_valid = 0;
+ break;
+ }
+ }
+
+ if (not_valid) {
+ dev_info(info->dev, "Valid bluetooth address not found,"
+ " setting some random\n");
+ /* When address is not valid, use some random */
+ memcpy(info->bd_addr, nokia_oui, 3);
+ get_random_bytes(info->bd_addr + 3, 3);
+ }
+
+ skb->data[offset + 7] = info->bd_addr[0];
+ skb->data[offset + 6] = info->bd_addr[1];
+ skb->data[offset + 4] = info->bd_addr[2];
+ skb->data[offset + 0] = info->bd_addr[3];
+ skb->data[offset + 3] = info->bd_addr[4];
+ skb->data[offset + 2] = info->bd_addr[5];
+ }
+
+ for (count = 1; ; count++) {
+ BT_DBG("Sending firmware command %d", count);
+ init_completion(&info->fw_completion);
+ skb_queue_tail(&info->txq, skb);
+ spin_lock_irqsave(&info->lock, flags);
+ hci_h4p_outb(info, UART_IER, hci_h4p_inb(info, UART_IER) |
+ UART_IER_THRI);
+ spin_unlock_irqrestore(&info->lock, flags);
+
+ skb = skb_dequeue(fw_queue);
+ if (!skb)
+ break;
+
+ if (!wait_for_completion_timeout(&info->fw_completion,
+ msecs_to_jiffies(1000))) {
+ dev_err(info->dev, "No reply to fw command\n");
+ return -ETIMEDOUT;
+ }
+
+ if (info->fw_error) {
+ dev_err(info->dev, "FW error\n");
+ return -EPROTO;
+ }
+ };
+
+ /* Wait for chip warm reset */
+ retries = 100;
+ while ((!skb_queue_empty(&info->txq) ||
+ !(hci_h4p_inb(info, UART_LSR) & UART_LSR_TEMT)) &&
+ retries--) {
+ msleep(10);
+ }
+ if (!retries) {
+ dev_err(info->dev, "Transmitter not empty\n");
+ return -ETIMEDOUT;
+ }
+
+ hci_h4p_change_speed(info, BC4_MAX_BAUD_RATE);
+
+ if (hci_h4p_wait_for_cts(info, 1, 100)) {
+ dev_err(info->dev, "cts didn't deassert after final speed\n");
+ return -ETIMEDOUT;
+ }
+
+ retries = 100;
+ do {
+ init_completion(&info->init_completion);
+ hci_h4p_send_alive_packet(info);
+ retries--;
+ } while (!wait_for_completion_timeout(&info->init_completion, 100) &&
+ retries > 0);
+
+ if (!retries) {
+ dev_err(info->dev, "No alive reply after speed change\n");
+ return -ETIMEDOUT;
+ }
+
+ return 0;
+}
diff --git a/drivers/staging/nokia_h4p/nokia_fw-ti1273.c b/drivers/staging/nokia_h4p/nokia_fw-ti1273.c
new file mode 100644
index 0000000..f5500f7
--- /dev/null
+++ b/drivers/staging/nokia_h4p/nokia_fw-ti1273.c
@@ -0,0 +1,110 @@
+/*
+ * This file is part of Nokia H4P bluetooth driver
+ *
+ * Copyright (C) 2009 Nokia Corporation.
+ *
+ * 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 <linux/skbuff.h>
+#include <linux/delay.h>
+#include <linux/serial_reg.h>
+
+#include "hci_h4p.h"
+
+static struct sk_buff_head *fw_q;
+
+void hci_h4p_ti1273_parse_fw_event(struct hci_h4p_info *info,
+ struct sk_buff *skb)
+{
+ struct sk_buff *fw_skb;
+ unsigned long flags;
+
+ if (skb->data[5] != 0x00) {
+ dev_err(info->dev, "Firmware sending command failed 0x%.2x\n",
+ skb->data[5]);
+ info->fw_error = -EPROTO;
+ }
+
+ kfree_skb(skb);
+
+ fw_skb = skb_dequeue(fw_q);
+ if (fw_skb == NULL || info->fw_error) {
+ complete(&info->fw_completion);
+ return;
+ }
+
+ skb_queue_tail(&info->txq, fw_skb);
+ spin_lock_irqsave(&info->lock, flags);
+ hci_h4p_outb(info, UART_IER, hci_h4p_inb(info, UART_IER) |
+ UART_IER_THRI);
+ spin_unlock_irqrestore(&info->lock, flags);
+}
+
+
+int hci_h4p_ti1273_send_fw(struct hci_h4p_info *info,
+ struct sk_buff_head *fw_queue)
+{
+ struct sk_buff *skb;
+ unsigned long flags, time;
+
+ info->fw_error = 0;
+
+ BT_DBG("Sending firmware");
+
+ time = jiffies;
+
+ fw_q = fw_queue;
+ skb = skb_dequeue(fw_queue);
+ if (!skb)
+ return -ENODATA;
+
+ BT_DBG("Sending commands");
+ /* Check if this is bd_address packet */
+ init_completion(&info->fw_completion);
+ hci_h4p_smart_idle(info, 0);
+ skb_queue_tail(&info->txq, skb);
+ spin_lock_irqsave(&info->lock, flags);
+ hci_h4p_outb(info, UART_IER, hci_h4p_inb(info, UART_IER) |
+ UART_IER_THRI);
+ spin_unlock_irqrestore(&info->lock, flags);
+
+ if (!wait_for_completion_timeout(&info->fw_completion,
+ msecs_to_jiffies(2000))) {
+ dev_err(info->dev, "No reply to fw command\n");
+ return -ETIMEDOUT;
+ }
+
+ if (info->fw_error) {
+ dev_err(info->dev, "FW error\n");
+ return -EPROTO;
+ }
+
+ BT_DBG("Firmware sent in %d msecs",
+ jiffies_to_msecs(jiffies-time));
+
+ hci_h4p_set_auto_ctsrts(info, 0, UART_EFR_RTS);
+ hci_h4p_set_rts(info, 0);
+ hci_h4p_change_speed(info, BC4_MAX_BAUD_RATE);
+ if (hci_h4p_wait_for_cts(info, 1, 100)) {
+ dev_err(info->dev,
+ "cts didn't go down after final speed change\n");
+ return -ETIMEDOUT;
+ }
+ hci_h4p_set_auto_ctsrts(info, 1, UART_EFR_RTS);
+
+ return 0;
+}
diff --git a/drivers/staging/nokia_h4p/nokia_fw.c b/drivers/staging/nokia_h4p/nokia_fw.c
new file mode 100644
index 0000000..cfea61c
--- /dev/null
+++ b/drivers/staging/nokia_h4p/nokia_fw.c
@@ -0,0 +1,195 @@
+/*
+ * This file is part of hci_h4p bluetooth driver
+ *
+ * Copyright (C) 2005, 2006 Nokia Corporation.
+ *
+ * Contact: Ville Tervo <ville.tervo@xxxxxxxxx>
+ *
+ * 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 <linux/skbuff.h>
+#include <linux/firmware.h>
+#include <linux/clk.h>
+
+#include <net/bluetooth/bluetooth.h>
+
+#include "hci_h4p.h"
+
+static int fw_pos;
+
+/* Firmware handling */
+static int hci_h4p_open_firmware(struct hci_h4p_info *info,
+ const struct firmware **fw_entry)
+{
+ int err;
+
+ fw_pos = 0;
+ BT_DBG("Opening firmware man_id 0x%.2x ver_id 0x%.2x",
+ info->man_id, info->ver_id);
+ switch (info->man_id) {
+ case H4P_ID_TI1271:
+ switch (info->ver_id) {
+ case 0xe1:
+ err = request_firmware(fw_entry, FW_NAME_TI1271_PRELE,
+ info->dev);
+ break;
+ case 0xd1:
+ case 0xf1:
+ err = request_firmware(fw_entry, FW_NAME_TI1271_LE,
+ info->dev);
+ break;
+ default:
+ err = request_firmware(fw_entry, FW_NAME_TI1271,
+ info->dev);
+ }
+ break;
+ case H4P_ID_CSR:
+ err = request_firmware(fw_entry, FW_NAME_CSR, info->dev);
+ break;
+ case H4P_ID_BCM2048:
+ err = request_firmware(fw_entry, FW_NAME_BCM2048, info->dev);
+ break;
+ default:
+ dev_err(info->dev, "Invalid chip type\n");
+ *fw_entry = NULL;
+ err = -EINVAL;
+ }
+
+ return err;
+}
+
+static void hci_h4p_close_firmware(const struct firmware *fw_entry)
+{
+ release_firmware(fw_entry);
+}
+
+/* Read fw. Return length of the command. If no more commands in
+ * fw 0 is returned. In error case return value is negative.
+ */
+static int hci_h4p_read_fw_cmd(struct hci_h4p_info *info, struct sk_buff **skb,
+ const struct firmware *fw_entry, gfp_t how)
+{
+ unsigned int cmd_len;
+
+ if (fw_pos >= fw_entry->size)
+ return 0;
+
+ if (fw_pos + 2 > fw_entry->size) {
+ dev_err(info->dev, "Corrupted firmware image 1\n");
+ return -EMSGSIZE;
+ }
+
+ cmd_len = fw_entry->data[fw_pos++];
+ cmd_len += fw_entry->data[fw_pos++] << 8;
+ if (cmd_len == 0)
+ return 0;
+
+ if (fw_pos + cmd_len > fw_entry->size) {
+ dev_err(info->dev, "Corrupted firmware image 2\n");
+ return -EMSGSIZE;
+ }
+
+ *skb = bt_skb_alloc(cmd_len, how);
+ if (!*skb) {
+ dev_err(info->dev, "Cannot reserve memory for buffer\n");
+ return -ENOMEM;
+ }
+ memcpy(skb_put(*skb, cmd_len), &fw_entry->data[fw_pos], cmd_len);
+
+ fw_pos += cmd_len;
+
+ return (*skb)->len;
+}
+
+int hci_h4p_read_fw(struct hci_h4p_info *info, struct sk_buff_head *fw_queue)
+{
+ const struct firmware *fw_entry = NULL;
+ struct sk_buff *skb = NULL;
+ int err;
+
+ err = hci_h4p_open_firmware(info, &fw_entry);
+ if (err < 0 || !fw_entry)
+ goto err_clean;
+
+ while ((err = hci_h4p_read_fw_cmd(info, &skb, fw_entry, GFP_KERNEL))) {
+ if (err < 0 || !skb)
+ goto err_clean;
+
+ skb_queue_tail(fw_queue, skb);
+ }
+
+ /* Chip detection code does neg and alive stuff
+ * discard two first skbs */
+ skb = skb_dequeue(fw_queue);
+ if (!skb) {
+ err = -EMSGSIZE;
+ goto err_clean;
+ }
+ kfree_skb(skb);
+ skb = skb_dequeue(fw_queue);
+ if (!skb) {
+ err = -EMSGSIZE;
+ goto err_clean;
+ }
+ kfree_skb(skb);
+
+err_clean:
+ hci_h4p_close_firmware(fw_entry);
+ return err;
+}
+
+int hci_h4p_send_fw(struct hci_h4p_info *info, struct sk_buff_head *fw_queue)
+{
+ int err;
+
+ switch (info->man_id) {
+ case H4P_ID_CSR:
+ err = hci_h4p_bc4_send_fw(info, fw_queue);
+ break;
+ case H4P_ID_TI1271:
+ err = hci_h4p_ti1273_send_fw(info, fw_queue);
+ break;
+ case H4P_ID_BCM2048:
+ err = hci_h4p_bcm_send_fw(info, fw_queue);
+ break;
+ default:
+ dev_err(info->dev, "Don't know how to send firmware\n");
+ err = -EINVAL;
+ }
+
+ return err;
+}
+
+void hci_h4p_parse_fw_event(struct hci_h4p_info *info, struct sk_buff *skb)
+{
+ switch (info->man_id) {
+ case H4P_ID_CSR:
+ hci_h4p_bc4_parse_fw_event(info, skb);
+ break;
+ case H4P_ID_TI1271:
+ hci_h4p_ti1273_parse_fw_event(info, skb);
+ break;
+ case H4P_ID_BCM2048:
+ hci_h4p_bcm_parse_fw_event(info, skb);
+ break;
+ default:
+ dev_err(info->dev, "Don't know how to parse fw event\n");
+ info->fw_error = -EINVAL;
+ }
+
+ return;
+}
diff --git a/drivers/staging/nokia_h4p/nokia_uart.c b/drivers/staging/nokia_h4p/nokia_uart.c
new file mode 100644
index 0000000..0fb57de
--- /dev/null
+++ b/drivers/staging/nokia_h4p/nokia_uart.c
@@ -0,0 +1,199 @@
+/*
+ * This file is part of Nokia H4P bluetooth driver
+ *
+ * Copyright (C) 2005, 2006 Nokia Corporation.
+ *
+ * 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 <linux/serial_reg.h>
+#include <linux/delay.h>
+#include <linux/clk.h>
+
+#include <linux/io.h>
+
+#include "hci_h4p.h"
+
+inline void hci_h4p_outb(struct hci_h4p_info *info, unsigned int offset, u8 val)
+{
+ __raw_writeb(val, info->uart_base + (offset << 2));
+}
+
+inline u8 hci_h4p_inb(struct hci_h4p_info *info, unsigned int offset)
+{
+ return __raw_readb(info->uart_base + (offset << 2));
+}
+
+void hci_h4p_set_rts(struct hci_h4p_info *info, int active)
+{
+ u8 b;
+
+ b = hci_h4p_inb(info, UART_MCR);
+ if (active)
+ b |= UART_MCR_RTS;
+ else
+ b &= ~UART_MCR_RTS;
+ hci_h4p_outb(info, UART_MCR, b);
+}
+
+int hci_h4p_wait_for_cts(struct hci_h4p_info *info, int active,
+ int timeout_ms)
+{
+ unsigned long timeout;
+ int state;
+
+ timeout = jiffies + msecs_to_jiffies(timeout_ms);
+ for (;;) {
+ state = hci_h4p_inb(info, UART_MSR) & UART_MSR_CTS;
+ if (active) {
+ if (state)
+ return 0;
+ } else {
+ if (!state)
+ return 0;
+ }
+ if (time_after(jiffies, timeout))
+ return -ETIMEDOUT;
+ msleep(1);
+ }
+}
+
+void __hci_h4p_set_auto_ctsrts(struct hci_h4p_info *info, int on, u8 which)
+{
+ u8 lcr, b;
+
+ lcr = hci_h4p_inb(info, UART_LCR);
+ hci_h4p_outb(info, UART_LCR, 0xbf);
+ b = hci_h4p_inb(info, UART_EFR);
+ if (on)
+ b |= which;
+ else
+ b &= ~which;
+ hci_h4p_outb(info, UART_EFR, b);
+ hci_h4p_outb(info, UART_LCR, lcr);
+}
+
+void hci_h4p_set_auto_ctsrts(struct hci_h4p_info *info, int on, u8 which)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->lock, flags);
+ __hci_h4p_set_auto_ctsrts(info, on, which);
+ spin_unlock_irqrestore(&info->lock, flags);
+}
+
+void hci_h4p_change_speed(struct hci_h4p_info *info, unsigned long speed)
+{
+ unsigned int divisor;
+ u8 lcr, mdr1;
+
+ BT_DBG("Setting speed %lu", speed);
+
+ if (speed >= 460800) {
+ divisor = UART_CLOCK / 13 / speed;
+ mdr1 = 3;
+ } else {
+ divisor = UART_CLOCK / 16 / speed;
+ mdr1 = 0;
+ }
+
+ /* Make sure UART mode is disabled */
+ hci_h4p_outb(info, UART_OMAP_MDR1, 7);
+
+ lcr = hci_h4p_inb(info, UART_LCR);
+ hci_h4p_outb(info, UART_LCR, UART_LCR_DLAB); /* Set DLAB */
+ hci_h4p_outb(info, UART_DLL, divisor & 0xff); /* Set speed */
+ hci_h4p_outb(info, UART_DLM, divisor >> 8);
+ hci_h4p_outb(info, UART_LCR, lcr);
+
+ /* Make sure UART mode is enabled */
+ hci_h4p_outb(info, UART_OMAP_MDR1, mdr1);
+}
+
+int hci_h4p_reset_uart(struct hci_h4p_info *info)
+{
+ int count = 0;
+
+ /* Reset the UART */
+ hci_h4p_outb(info, UART_OMAP_SYSC, UART_SYSC_OMAP_RESET);
+ while (!(hci_h4p_inb(info, UART_OMAP_SYSS) & UART_SYSS_RESETDONE)) {
+ if (count++ > 100) {
+ dev_err(info->dev, "hci_h4p: UART reset timeout\n");
+ return -ENODEV;
+ }
+ udelay(1);
+ }
+
+ return 0;
+}
+
+void hci_h4p_store_regs(struct hci_h4p_info *info)
+{
+ u16 lcr = 0;
+
+ lcr = hci_h4p_inb(info, UART_LCR);
+ hci_h4p_outb(info, UART_LCR, 0xBF);
+ info->dll = hci_h4p_inb(info, UART_DLL);
+ info->dlh = hci_h4p_inb(info, UART_DLM);
+ info->efr = hci_h4p_inb(info, UART_EFR);
+ hci_h4p_outb(info, UART_LCR, lcr);
+ info->mdr1 = hci_h4p_inb(info, UART_OMAP_MDR1);
+ info->ier = hci_h4p_inb(info, UART_IER);
+}
+
+void hci_h4p_restore_regs(struct hci_h4p_info *info)
+{
+ u16 lcr = 0;
+
+ hci_h4p_init_uart(info);
+
+ hci_h4p_outb(info, UART_OMAP_MDR1, 7);
+ lcr = hci_h4p_inb(info, UART_LCR);
+ hci_h4p_outb(info, UART_LCR, 0xBF);
+ hci_h4p_outb(info, UART_DLL, info->dll); /* Set speed */
+ hci_h4p_outb(info, UART_DLM, info->dlh);
+ hci_h4p_outb(info, UART_EFR, info->efr);
+ hci_h4p_outb(info, UART_LCR, lcr);
+ hci_h4p_outb(info, UART_OMAP_MDR1, info->mdr1);
+ hci_h4p_outb(info, UART_IER, info->ier);
+}
+
+void hci_h4p_init_uart(struct hci_h4p_info *info)
+{
+ u8 mcr, efr;
+
+ /* Enable and setup FIFO */
+ hci_h4p_outb(info, UART_OMAP_MDR1, 0x00);
+
+ hci_h4p_outb(info, UART_LCR, 0xbf);
+ efr = hci_h4p_inb(info, UART_EFR);
+ hci_h4p_outb(info, UART_EFR, UART_EFR_ECB);
+ hci_h4p_outb(info, UART_LCR, UART_LCR_DLAB);
+ mcr = hci_h4p_inb(info, UART_MCR);
+ hci_h4p_outb(info, UART_MCR, UART_MCR_TCRTLR);
+ hci_h4p_outb(info, UART_FCR, UART_FCR_ENABLE_FIFO |
+ UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
+ (3 << 6) | (0 << 4));
+ hci_h4p_outb(info, UART_LCR, 0xbf);
+ hci_h4p_outb(info, UART_TI752_TLR, 0xed);
+ hci_h4p_outb(info, UART_TI752_TCR, 0xef);
+ hci_h4p_outb(info, UART_EFR, efr);
+ hci_h4p_outb(info, UART_LCR, UART_LCR_DLAB);
+ hci_h4p_outb(info, UART_MCR, 0x00);
+ hci_h4p_outb(info, UART_LCR, UART_LCR_WLEN8);
+ hci_h4p_outb(info, UART_IER, UART_IER_RDI);
+ hci_h4p_outb(info, UART_OMAP_SYSC, (1 << 0) | (1 << 2) | (2 << 3));
+}
diff --git a/include/linux/platform_data/bt-nokia-h4p.h b/include/linux/platform_data/bt-nokia-h4p.h
new file mode 100644
index 0000000..30d169d
--- /dev/null
+++ b/include/linux/platform_data/bt-nokia-h4p.h
@@ -0,0 +1,38 @@
+/*
+ * This file is part of Nokia H4P bluetooth driver
+ *
+ * Copyright (C) 2010 Nokia Corporation.
+ *
+ * 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
+ *
+ */
+
+
+/**
+ * struct hci_h4p_platform data - hci_h4p Platform data structure
+ */
+struct hci_h4p_platform_data {
+ int chip_type;
+ int bt_sysclk;
+ unsigned int bt_wakeup_gpio;
+ unsigned int host_wakeup_gpio;
+ unsigned int reset_gpio;
+ int reset_gpio_shared;
+ unsigned int uart_irq;
+ phys_addr_t uart_base;
+ const char *uart_iclk;
+ const char *uart_fclk;
+ void (*set_pm_limits)(struct device *dev, bool set);
+};
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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