313 lines
8.1 KiB
C
313 lines
8.1 KiB
C
/*
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* Bluetooth Broadcom GPIO and Low Power Mode control
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*
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* Copyright (C) 2011 Samsung Electronics Co., Ltd.
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* Copyright (C) 2011 Google, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#define DEBUG
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#include <linux/delay.h>
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#include <linux/gpio.h>
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#include <linux/hrtimer.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/rfkill.h>
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#include <linux/wakelock.h>
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#include <asm/mach-types.h>
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#include "board-8064.h"
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#include <linux/barcode_emul.h>
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#include <mach/apq8064-gpio.h>
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#include <mach/gpiomux.h>
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#define BT_UART_CFG
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#define BT_LPM_ENABLE
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#define BT_UART_RTS 17
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#define BT_UART_CTS 16
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#define BT_UART_RXD 15
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#define BT_UART_TXD 14
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#define BT_HOST_WAKE 58
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#define BT_HOST_WAKE_REV8 63
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#define BT_WAKE -1
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#define BT_EN -1
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#define GPIO_BT_UART_RTS BT_UART_RTS
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#define GPIO_BT_UART_CTS BT_UART_CTS
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#define GPIO_BT_UART_RXD BT_UART_RXD
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#define GPIO_BT_UART_TXD BT_UART_TXD
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#define GPIO_BT_HOST_WAKE BT_HOST_WAKE
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static struct rfkill *bt_rfkill;
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int get_gpio_hwrev(int gpio)
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{
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#if defined(CONFIG_MACH_JF_SPR) || defined(CONFIG_MACH_JF_VZW) || defined(CONFIG_MACH_JF_USC) || defined(CONFIG_MACH_JF_LGT)
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if(system_rev >= BOARD_REV09) {
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if (gpio == GPIO_BT_HOST_WAKE)
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return BT_HOST_WAKE_REV8;
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}
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#else
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/*if defined(CONFIG_MACH_JF_SPR) || defined(CONFIG_MACH_JF_VZW)*/
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if(system_rev >= BOARD_REV08) {
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if (gpio == GPIO_BT_HOST_WAKE)
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return BT_HOST_WAKE_REV8;
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}
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#endif
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return gpio;
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}
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#ifdef BT_UART_CFG
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static unsigned bt_uart_on_table[] = {
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GPIO_CFG(GPIO_BT_UART_RTS, 2, GPIO_CFG_OUTPUT, GPIO_CFG_NO_PULL,
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GPIO_CFG_8MA),
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GPIO_CFG(GPIO_BT_UART_CTS, 2, GPIO_CFG_INPUT, GPIO_CFG_NO_PULL,
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GPIO_CFG_8MA),
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GPIO_CFG(GPIO_BT_UART_RXD, 2, GPIO_CFG_INPUT, GPIO_CFG_NO_PULL,
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GPIO_CFG_8MA),
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GPIO_CFG(GPIO_BT_UART_TXD, 2, GPIO_CFG_OUTPUT, GPIO_CFG_NO_PULL,
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GPIO_CFG_8MA),
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};
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static unsigned bt_uart_off_table[] = {
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GPIO_CFG(GPIO_BT_UART_RTS, 0, GPIO_CFG_OUTPUT, GPIO_CFG_NO_PULL,
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GPIO_CFG_8MA),
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GPIO_CFG(GPIO_BT_UART_CTS, 0, GPIO_CFG_OUTPUT, GPIO_CFG_NO_PULL,
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GPIO_CFG_8MA),
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GPIO_CFG(GPIO_BT_UART_RXD, 0, GPIO_CFG_OUTPUT, GPIO_CFG_NO_PULL,
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GPIO_CFG_8MA),
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GPIO_CFG(GPIO_BT_UART_TXD, 0, GPIO_CFG_OUTPUT, GPIO_CFG_NO_PULL,
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GPIO_CFG_8MA),
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};
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#endif
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#ifdef BT_LPM_ENABLE
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static struct resource bluesleep_resources[] = {
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{
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.name = "gpio_host_wake",
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.start = -1,
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.end = -1,
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.flags = IORESOURCE_IO,
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},
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{
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.name = "gpio_ext_wake",
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.start = -1,
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.end = -1,
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.flags = IORESOURCE_IO,
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},
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{
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.name = "host_wake",
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.start = -1,
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.end = -1,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct platform_device msm_bluesleep_device = {
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.name = "bluesleep",
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.id = -1,
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.num_resources = ARRAY_SIZE(bluesleep_resources),
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.resource = bluesleep_resources,
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};
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static void gpio_rev_init(void)
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{
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bluesleep_resources[0].start = get_gpio_hwrev(GPIO_BT_HOST_WAKE);
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bluesleep_resources[0].end = get_gpio_hwrev(GPIO_BT_HOST_WAKE);
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bluesleep_resources[1].start = FPGA_GPIO_BT_WAKE;
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bluesleep_resources[1].end = FPGA_GPIO_BT_WAKE;
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bluesleep_resources[2].start = \
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MSM_GPIO_TO_INT(get_gpio_hwrev(GPIO_BT_HOST_WAKE));
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bluesleep_resources[2].end = \
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MSM_GPIO_TO_INT(get_gpio_hwrev(GPIO_BT_HOST_WAKE));
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}
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#endif
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static int bcm4335_bt_rfkill_set_power(void *data, bool blocked)
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{
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/* rfkill_ops callback. Turn transmitter on when blocked is false */
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#ifdef BT_UART_CFG
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int pin, rc = 0;
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#endif
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int ret = -1;
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if (!blocked) {
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pr_err("[BT] Bluetooth Power On.\n");
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ret = ice_gpiox_set(FPGA_GPIO_BT_WAKE, 1);
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if (ret)
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pr_err("[BT] failed to set ext_wake to high.\n");
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#ifdef BT_UART_CFG
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for (pin = 0; pin < ARRAY_SIZE(bt_uart_on_table); pin++) {
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rc = gpio_tlmm_config(bt_uart_on_table[pin],
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GPIO_CFG_ENABLE);
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if (rc < 0)
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pr_err("[BT] %s: gpio_tlmm_config(%#x)=%d\n",
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__func__, bt_uart_on_table[pin], rc);
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}
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#endif
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ret = ice_gpiox_set(FPGA_GPIO_BT_EN, 1);
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if (ret)
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pr_err("[BT] failed to set BT_EN.\n");
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} else {
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#ifdef BT_UART_CFG
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for (pin = 0; pin < ARRAY_SIZE(bt_uart_off_table); pin++) {
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rc = gpio_tlmm_config(bt_uart_off_table[pin],
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GPIO_CFG_ENABLE);
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if (rc < 0)
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pr_err("%s: gpio_tlmm_config(%#x)=%d\n",
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__func__, bt_uart_off_table[pin], rc);
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}
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#endif
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pr_err("[BT] Bluetooth Power Off.\n");
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ret = ice_gpiox_set(FPGA_GPIO_BT_EN, 0);
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if (ret)
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pr_err("[BT] failed to set BT_EN.\n");
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}
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return 0;
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}
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static struct platform_device bcm4335_bluetooth_platform_device = {
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.name = "bcm4335_bluetooth",
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.id = -1,
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};
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static struct platform_device *jf_bt_devs[] __initdata = {
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&bcm4335_bluetooth_platform_device,
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};
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void __init apq8064_bt_init(void)
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{
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#ifdef BT_LPM_ENABLE
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gpio_rev_init();
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platform_device_register(&msm_bluesleep_device);
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#endif
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platform_add_devices(jf_bt_devs, ARRAY_SIZE(jf_bt_devs));
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}
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static const struct rfkill_ops bcm4335_bt_rfkill_ops = {
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.set_block = bcm4335_bt_rfkill_set_power,
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};
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static int bcm4335_bluetooth_probe(struct platform_device *pdev)
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{
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int rc = 0;
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#ifdef BT_UART_CFG
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int pin = 0;
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#endif
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/* temporailiy set HOST_WAKE OUT direction until FPGA work finishs */
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/* if setting HOST_WAKE to NO PULL, BT would not be turned on. */
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/* By guideline of BRCM, it is needed to determine pull status */
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#ifndef BT_LPM_ENABLE
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gpio_tlmm_config(GPIO_CFG(get_gpio_hwrev(GPIO_BT_HOST_WAKE), 0, GPIO_CFG_OUTPUT,
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GPIO_CFG_PULL_UP, GPIO_CFG_8MA), GPIO_CFG_ENABLE);
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gpio_set_value(get_gpio_hwrev(GPIO_BT_HOST_WAKE), 1);
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#endif
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#ifdef BT_UART_CFG
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for (pin = 0; pin < ARRAY_SIZE(bt_uart_off_table); pin++) {
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rc = gpio_tlmm_config(bt_uart_off_table[pin], GPIO_CFG_ENABLE);
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if (rc < 0)
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pr_err("%s: gpio_tlmm_config(%#x)=%d\n",
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__func__, bt_uart_off_table[pin], rc);
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}
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#endif
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bt_rfkill = rfkill_alloc("bcm4335 Bluetooth", &pdev->dev,
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RFKILL_TYPE_BLUETOOTH, &bcm4335_bt_rfkill_ops,
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NULL);
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if (unlikely(!bt_rfkill)) {
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pr_err("[BT] bt_rfkill alloc failed.\n");
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gpio_free(ice_gpiox_get(FPGA_GPIO_BT_EN));
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return -ENOMEM;
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}
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rfkill_init_sw_state(bt_rfkill, 0);
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rc = rfkill_register(bt_rfkill);
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if (unlikely(rc)) {
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pr_err("[BT] bt_rfkill register failed.\n");
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rfkill_destroy(bt_rfkill);
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gpio_free(ice_gpiox_get(FPGA_GPIO_BT_EN));
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return rc;
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}
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rfkill_set_sw_state(bt_rfkill, true);
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return rc;
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}
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static int bcm4335_bluetooth_remove(struct platform_device *pdev)
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{
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rfkill_unregister(bt_rfkill);
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rfkill_destroy(bt_rfkill);
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gpio_free(ice_gpiox_get(FPGA_GPIO_BT_EN));
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return 0;
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}
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static struct platform_driver bcm4335_bluetooth_platform_driver = {
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.probe = bcm4335_bluetooth_probe,
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.remove = bcm4335_bluetooth_remove,
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.driver = {
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.name = "bcm4335_bluetooth",
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.owner = THIS_MODULE,
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},
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};
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static int __init bcm4335_bluetooth_init(void)
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{
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return platform_driver_register(&bcm4335_bluetooth_platform_driver);
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}
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static void __exit bcm4335_bluetooth_exit(void)
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{
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#ifdef BT_LPM_ENABLE
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platform_device_unregister(&msm_bluesleep_device);
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#endif
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platform_driver_unregister(&bcm4335_bluetooth_platform_driver);
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}
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module_init(bcm4335_bluetooth_init);
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module_exit(bcm4335_bluetooth_exit);
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MODULE_ALIAS("platform:bcm4335");
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MODULE_DESCRIPTION("bcm4335_bluetooth");
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MODULE_LICENSE("GPL");
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