/* * arch/arm/mach-s3c2410/h1940-bluetooth.c * Copyright (c) Arnaud Patard <arnaud.patard@rtp-net.org> * * This file is subject to the terms and conditions of the GNU General Public * License. See the file COPYING in the main directory of this archive for * more details. * * S3C2410 bluetooth "driver" * */ #include <linux/module.h> #include <linux/platform_device.h> #include <linux/delay.h> #include <linux/string.h> #include <linux/ctype.h> #include <linux/leds.h> #include <linux/gpio.h> #include <linux/rfkill.h> #include <mach/regs-gpio.h> #include <mach/hardware.h> #include <mach/h1940-latch.h> #define DRV_NAME "h1940-bt" /* Bluetooth control */ static void h1940bt_enable(int on) { if (on) { /* Power on the chip */ h1940_latch_control(0, H1940_LATCH_BLUETOOTH_POWER); /* Reset the chip */ mdelay(10); s3c2410_gpio_setpin(S3C2410_GPH(1), 1); mdelay(10); s3c2410_gpio_setpin(S3C2410_GPH(1), 0); } else { s3c2410_gpio_setpin(S3C2410_GPH(1), 1); mdelay(10); s3c2410_gpio_setpin(S3C2410_GPH(1), 0); mdelay(10); h1940_latch_control(H1940_LATCH_BLUETOOTH_POWER, 0); } } static int h1940bt_set_block(void *data, bool blocked) { h1940bt_enable(!blocked); return 0; } static const struct rfkill_ops h1940bt_rfkill_ops = { .set_block = h1940bt_set_block, }; static int __init h1940bt_probe(struct platform_device *pdev) { struct rfkill *rfk; int ret = 0; /* Configures BT serial port GPIOs */ s3c2410_gpio_cfgpin(S3C2410_GPH(0), S3C2410_GPH0_nCTS0); s3c2410_gpio_pullup(S3C2410_GPH(0), 1); s3c2410_gpio_cfgpin(S3C2410_GPH(1), S3C2410_GPIO_OUTPUT); s3c2410_gpio_pullup(S3C2410_GPH(1), 1); s3c2410_gpio_cfgpin(S3C2410_GPH(2), S3C2410_GPH2_TXD0); s3c2410_gpio_pullup(S3C2410_GPH(2), 1); s3c2410_gpio_cfgpin(S3C2410_GPH(3), S3C2410_GPH3_RXD0); s3c2410_gpio_pullup(S3C2410_GPH(3), 1); rfk = rfkill_alloc(DRV_NAME, &pdev->dev, RFKILL_TYPE_BLUETOOTH, &h1940bt_rfkill_ops, NULL); if (!rfk) { ret = -ENOMEM; goto err_rfk_alloc; } rfkill_set_led_trigger_name(rfk, "h1940-bluetooth"); ret = rfkill_register(rfk); if (ret) goto err_rfkill; platform_set_drvdata(pdev, rfk); return 0; err_rfkill: rfkill_destroy(rfk); err_rfk_alloc: return ret; } static int h1940bt_remove(struct platform_device *pdev) { struct rfkill *rfk = platform_get_drvdata(pdev); platform_set_drvdata(pdev, NULL); if (rfk) { rfkill_unregister(rfk); rfkill_destroy(rfk); } rfk = NULL; h1940bt_enable(0); return 0; } static struct platform_driver h1940bt_driver = { .driver = { .name = DRV_NAME, }, .probe = h1940bt_probe, .remove = h1940bt_remove, }; static int __init h1940bt_init(void) { return platform_driver_register(&h1940bt_driver); } static void __exit h1940bt_exit(void) { platform_driver_unregister(&h1940bt_driver); } module_init(h1940bt_init); module_exit(h1940bt_exit); MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>"); MODULE_DESCRIPTION("Driver for the iPAQ H1940 bluetooth chip"); MODULE_LICENSE("GPL");