358 lines
7.7 KiB
C
358 lines
7.7 KiB
C
/*
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* Copyright (C) 2009 Google, Inc.
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* Copyright (C) 2009 HTC Corporation.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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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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*/
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/* Control bluetooth power for supersonic platform */
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#include <linux/platform_device.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/rfkill.h>
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#include <linux/delay.h>
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#include <linux/gpio.h>
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#include <asm/mach-types.h>
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#include "gpio_chip.h"
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#include "proc_comm.h"
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#include "board-supersonic.h"
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#define HTC_RFKILL_DBG
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static struct rfkill *bt_rfk;
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static const char bt_name[] = "bcm4329";
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static int pre_state;
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static uint32_t supersonic_bt_init_table[] = {
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/* BT_RTS */
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PCOM_GPIO_CFG(SUPERSONIC_GPIO_BT_UART1_RTS,
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0,
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GPIO_OUTPUT,
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GPIO_NO_PULL,
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GPIO_8MA),
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/* BT_CTS */
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PCOM_GPIO_CFG(SUPERSONIC_GPIO_BT_UART1_CTS,
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0,
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GPIO_INPUT,
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GPIO_PULL_UP,
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GPIO_8MA),
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/* BT_RX */
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PCOM_GPIO_CFG(SUPERSONIC_GPIO_BT_UART1_RX,
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0,
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GPIO_INPUT,
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GPIO_PULL_UP,
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GPIO_8MA),
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/* BT_TX */
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PCOM_GPIO_CFG(SUPERSONIC_GPIO_BT_UART1_TX,
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0,
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GPIO_OUTPUT,
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GPIO_NO_PULL,
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GPIO_8MA),
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/* BT_SHUTDOWN_N */
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PCOM_GPIO_CFG(SUPERSONIC_GPIO_BT_SHUTDOWN_N,
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0,
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GPIO_OUTPUT,
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GPIO_NO_PULL,
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GPIO_4MA),
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/* BT_RESET_N */
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PCOM_GPIO_CFG(SUPERSONIC_GPIO_BT_RESET_N,
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0,
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GPIO_OUTPUT,
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GPIO_NO_PULL,
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GPIO_4MA),
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/* BT_HOST_WAKE */
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PCOM_GPIO_CFG(SUPERSONIC_GPIO_BT_HOST_WAKE,
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0,
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GPIO_INPUT,
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GPIO_PULL_UP,
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GPIO_4MA),
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/* BT_CHIP_WAKE */
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PCOM_GPIO_CFG(SUPERSONIC_GPIO_BT_CHIP_WAKE,
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0,
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GPIO_OUTPUT,
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GPIO_NO_PULL,
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GPIO_4MA),
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};
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static uint32_t supersonic_bt_on_table[] = {
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/* BT_RTS */
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PCOM_GPIO_CFG(SUPERSONIC_GPIO_BT_UART1_RTS,
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2,
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GPIO_OUTPUT,
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GPIO_PULL_UP,
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GPIO_8MA),
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/* BT_CTS */
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PCOM_GPIO_CFG(SUPERSONIC_GPIO_BT_UART1_CTS,
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2,
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GPIO_INPUT,
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GPIO_PULL_UP,
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GPIO_8MA),
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/* BT_RX */
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PCOM_GPIO_CFG(SUPERSONIC_GPIO_BT_UART1_RX,
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2,
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GPIO_INPUT,
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GPIO_PULL_UP,
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GPIO_8MA),
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/* BT_TX */
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PCOM_GPIO_CFG(SUPERSONIC_GPIO_BT_UART1_TX,
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2,
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GPIO_OUTPUT,
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GPIO_PULL_UP,
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GPIO_8MA),
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/* BT_HOST_WAKE */
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PCOM_GPIO_CFG(SUPERSONIC_GPIO_BT_HOST_WAKE,
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0,
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GPIO_INPUT,
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GPIO_NO_PULL,
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GPIO_4MA),
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/* BT_CHIP_WAKE */
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PCOM_GPIO_CFG(SUPERSONIC_GPIO_BT_CHIP_WAKE,
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0,
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GPIO_OUTPUT,
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GPIO_NO_PULL,
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GPIO_4MA),
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};
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static uint32_t supersonic_bt_off_table[] = {
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/* BT_RTS */
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PCOM_GPIO_CFG(SUPERSONIC_GPIO_BT_UART1_RTS,
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0,
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GPIO_OUTPUT,
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GPIO_NO_PULL,
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GPIO_8MA),
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/* BT_CTS */
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PCOM_GPIO_CFG(SUPERSONIC_GPIO_BT_UART1_CTS,
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0,
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GPIO_INPUT,
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GPIO_PULL_UP,
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GPIO_8MA),
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/* BT_RX */
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PCOM_GPIO_CFG(SUPERSONIC_GPIO_BT_UART1_RX,
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0,
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GPIO_INPUT,
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GPIO_PULL_UP,
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GPIO_8MA),
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/* BT_TX */
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PCOM_GPIO_CFG(SUPERSONIC_GPIO_BT_UART1_TX,
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0,
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GPIO_OUTPUT,
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GPIO_NO_PULL,
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GPIO_8MA),
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/* BT_HOST_WAKE */
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PCOM_GPIO_CFG(SUPERSONIC_GPIO_BT_HOST_WAKE,
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0,
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GPIO_INPUT,
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GPIO_PULL_UP,
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GPIO_4MA),
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/* BT_CHIP_WAKE */
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PCOM_GPIO_CFG(SUPERSONIC_GPIO_BT_CHIP_WAKE,
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0,
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GPIO_OUTPUT,
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GPIO_NO_PULL,
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GPIO_4MA),
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};
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static void config_bt_table(uint32_t *table, int len)
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{
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int n;
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unsigned id;
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for (n = 0; n < len; n++) {
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id = table[n];
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msm_proc_comm(PCOM_RPC_GPIO_TLMM_CONFIG_EX, &id, 0);
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}
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}
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static void supersonic_config_bt_init(void)
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{
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/* set bt initial configuration*/
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config_bt_table(supersonic_bt_init_table,
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ARRAY_SIZE(supersonic_bt_init_table));
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/* BT_RESET_N */
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gpio_configure(SUPERSONIC_GPIO_BT_RESET_N,
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GPIOF_DRIVE_OUTPUT | GPIOF_OUTPUT_LOW);
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mdelay(5);
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/* BT_SHUTDOWN_N */
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gpio_configure(SUPERSONIC_GPIO_BT_SHUTDOWN_N,
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GPIOF_DRIVE_OUTPUT | GPIOF_OUTPUT_HIGH);
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/* BT_RESET_N */
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gpio_configure(SUPERSONIC_GPIO_BT_RESET_N,
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GPIOF_DRIVE_OUTPUT | GPIOF_OUTPUT_HIGH);
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mdelay(15);
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/* BT_RESET_N */
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gpio_configure(SUPERSONIC_GPIO_BT_RESET_N,
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GPIOF_DRIVE_OUTPUT | GPIOF_OUTPUT_LOW);
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/* BT_SHUTDOWN_N */
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gpio_configure(SUPERSONIC_GPIO_BT_SHUTDOWN_N,
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GPIOF_DRIVE_OUTPUT | GPIOF_OUTPUT_LOW);
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/* BT_RTS */
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gpio_configure(SUPERSONIC_GPIO_BT_UART1_RTS,
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GPIOF_DRIVE_OUTPUT | GPIOF_OUTPUT_LOW);
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/* BT_TX */
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gpio_configure(SUPERSONIC_GPIO_BT_UART1_TX,
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GPIOF_DRIVE_OUTPUT | GPIOF_OUTPUT_LOW);
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/* BT_CHIP_WAKE */
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gpio_configure(SUPERSONIC_GPIO_BT_CHIP_WAKE,
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GPIOF_DRIVE_OUTPUT | GPIOF_OUTPUT_LOW);
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}
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static void supersonic_config_bt_on(void)
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{
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#ifdef HTC_RFKILL_DBG
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printk(KERN_INFO "-- RK ON --\n");
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#endif
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/* set bt on configuration*/
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config_bt_table(supersonic_bt_on_table,
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ARRAY_SIZE(supersonic_bt_on_table));
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mdelay(5);
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/* BT_SHUTDOWN_N */
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gpio_configure(SUPERSONIC_GPIO_BT_SHUTDOWN_N,
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GPIOF_DRIVE_OUTPUT | GPIOF_OUTPUT_HIGH);
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/* BT_RESET_N */
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gpio_configure(SUPERSONIC_GPIO_BT_RESET_N,
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GPIOF_DRIVE_OUTPUT | GPIOF_OUTPUT_HIGH);
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mdelay(5);
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/* BT_CHIP_WAKE */
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gpio_configure(SUPERSONIC_GPIO_BT_CHIP_WAKE,
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GPIOF_DRIVE_OUTPUT | GPIOF_OUTPUT_HIGH);
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}
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static void supersonic_config_bt_off(void)
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{
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#ifdef HTC_RFKILL_DBG
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printk(KERN_INFO "-- RK OFF --\n");
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#endif
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/* BT_RESET_N */
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gpio_configure(SUPERSONIC_GPIO_BT_RESET_N,
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GPIOF_DRIVE_OUTPUT | GPIOF_OUTPUT_LOW);
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/* BT_SHUTDOWN_N */
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gpio_configure(SUPERSONIC_GPIO_BT_SHUTDOWN_N,
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GPIOF_DRIVE_OUTPUT | GPIOF_OUTPUT_LOW);
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config_bt_table(supersonic_bt_off_table,
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ARRAY_SIZE(supersonic_bt_off_table));
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mdelay(5);
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/* BT_RTS */
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gpio_configure(SUPERSONIC_GPIO_BT_UART1_RTS,
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GPIOF_DRIVE_OUTPUT | GPIOF_OUTPUT_LOW);
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/* BT_TX */
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gpio_configure(SUPERSONIC_GPIO_BT_UART1_TX,
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GPIOF_DRIVE_OUTPUT | GPIOF_OUTPUT_LOW);
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/* BT_CHIP_WAKE */
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gpio_configure(SUPERSONIC_GPIO_BT_CHIP_WAKE,
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GPIOF_DRIVE_OUTPUT | GPIOF_OUTPUT_LOW);
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}
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static int bluetooth_set_power(void *data, bool blocked)
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{
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if (pre_state == blocked) {
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#ifdef HTC_RFKILL_DBG
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printk(KERN_INFO "-- SAME ST --\n");
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#endif
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return 0;
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} else
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pre_state = blocked;
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if (!blocked)
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supersonic_config_bt_on();
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else
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supersonic_config_bt_off();
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return 0;
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}
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static struct rfkill_ops supersonic_rfkill_ops = {
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.set_block = bluetooth_set_power,
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};
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static int supersonic_rfkill_probe(struct platform_device *pdev)
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{
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int rc = 0;
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bool default_state = true; /* off */
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supersonic_config_bt_init(); /* bt gpio initial config */
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bluetooth_set_power(NULL, default_state);
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bt_rfk = rfkill_alloc(bt_name, &pdev->dev, RFKILL_TYPE_BLUETOOTH,
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&supersonic_rfkill_ops, NULL);
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if (!bt_rfk) {
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rc = -ENOMEM;
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goto err_rfkill_reset;
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}
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rfkill_set_states(bt_rfk, default_state, false);
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/* userspace cannot take exclusive control */
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rc = rfkill_register(bt_rfk);
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if (rc)
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goto err_rfkill_reg;
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return 0;
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err_rfkill_reg:
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rfkill_destroy(bt_rfk);
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err_rfkill_reset:
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return rc;
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}
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static int supersonic_rfkill_remove(struct platform_device *dev)
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{
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rfkill_unregister(bt_rfk);
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rfkill_destroy(bt_rfk);
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return 0;
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}
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static struct platform_driver supersonic_rfkill_driver = {
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.probe = supersonic_rfkill_probe,
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.remove = supersonic_rfkill_remove,
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.driver = {
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.name = "supersonic_rfkill",
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.owner = THIS_MODULE,
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},
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};
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static int __init supersonic_rfkill_init(void)
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{
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pre_state = -1;
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if (!machine_is_supersonic())
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return 0;
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return platform_driver_register(&supersonic_rfkill_driver);
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}
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static void __exit supersonic_rfkill_exit(void)
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{
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platform_driver_unregister(&supersonic_rfkill_driver);
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}
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module_init(supersonic_rfkill_init);
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module_exit(supersonic_rfkill_exit);
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MODULE_DESCRIPTION("supersonic rfkill");
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MODULE_AUTHOR("Nick Pelly <npelly@google.com>");
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MODULE_LICENSE("GPL");
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