/* * Core functions for: * Philips UCB1400 multifunction chip * * Based on ucb1400_ts.c: * Author: Nicolas Pitre * Created: September 25, 2006 * Copyright: MontaVista Software, Inc. * * Spliting done by: Marek Vasut <marek.vasut@gmail.com> * If something doesn't work and it worked before spliting, e-mail me, * dont bother Nicolas please ;-) * * 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 code is heavily based on ucb1x00-*.c copyrighted by Russell King * covering the UCB1100, UCB1200 and UCB1300.. Support for the UCB1400 has * been made separate from ucb1x00-core/ucb1x00-ts on Russell's request. */ #include <linux/module.h> #include <linux/sched.h> #include <linux/slab.h> #include <linux/ucb1400.h> unsigned int ucb1400_adc_read(struct snd_ac97 *ac97, u16 adc_channel, int adcsync) { unsigned int val; if (adcsync) adc_channel |= UCB_ADC_SYNC_ENA; ucb1400_reg_write(ac97, UCB_ADC_CR, UCB_ADC_ENA | adc_channel); ucb1400_reg_write(ac97, UCB_ADC_CR, UCB_ADC_ENA | adc_channel | UCB_ADC_START); while (!((val = ucb1400_reg_read(ac97, UCB_ADC_DATA)) & UCB_ADC_DAT_VALID)) schedule_timeout_uninterruptible(1); return val & UCB_ADC_DAT_MASK; } EXPORT_SYMBOL_GPL(ucb1400_adc_read); static int ucb1400_core_probe(struct device *dev) { int err; struct ucb1400 *ucb; struct ucb1400_ts ucb_ts; struct ucb1400_gpio ucb_gpio; struct snd_ac97 *ac97; struct ucb1400_pdata *pdata = dev_get_platdata(dev); memset(&ucb_ts, 0, sizeof(ucb_ts)); memset(&ucb_gpio, 0, sizeof(ucb_gpio)); ucb = kzalloc(sizeof(struct ucb1400), GFP_KERNEL); if (!ucb) { err = -ENOMEM; goto err; } dev_set_drvdata(dev, ucb); ac97 = to_ac97_t(dev); ucb_ts.id = ucb1400_reg_read(ac97, UCB_ID); if (ucb_ts.id != UCB_ID_1400) { err = -ENODEV; goto err0; } /* GPIO */ ucb_gpio.ac97 = ac97; if (pdata) { ucb_gpio.gpio_setup = pdata->gpio_setup; ucb_gpio.gpio_teardown = pdata->gpio_teardown; ucb_gpio.gpio_offset = pdata->gpio_offset; } ucb->ucb1400_gpio = platform_device_alloc("ucb1400_gpio", -1); if (!ucb->ucb1400_gpio) { err = -ENOMEM; goto err0; } err = platform_device_add_data(ucb->ucb1400_gpio, &ucb_gpio, sizeof(ucb_gpio)); if (err) goto err1; err = platform_device_add(ucb->ucb1400_gpio); if (err) goto err1; /* TOUCHSCREEN */ ucb_ts.ac97 = ac97; if (pdata != NULL && pdata->irq >= 0) ucb_ts.irq = pdata->irq; else ucb_ts.irq = -1; ucb->ucb1400_ts = platform_device_alloc("ucb1400_ts", -1); if (!ucb->ucb1400_ts) { err = -ENOMEM; goto err2; } err = platform_device_add_data(ucb->ucb1400_ts, &ucb_ts, sizeof(ucb_ts)); if (err) goto err3; err = platform_device_add(ucb->ucb1400_ts); if (err) goto err3; return 0; err3: platform_device_put(ucb->ucb1400_ts); err2: platform_device_del(ucb->ucb1400_gpio); err1: platform_device_put(ucb->ucb1400_gpio); err0: kfree(ucb); err: return err; } static int ucb1400_core_remove(struct device *dev) { struct ucb1400 *ucb = dev_get_drvdata(dev); platform_device_unregister(ucb->ucb1400_ts); platform_device_unregister(ucb->ucb1400_gpio); kfree(ucb); return 0; } static struct device_driver ucb1400_core_driver = { .name = "ucb1400_core", .bus = &ac97_bus_type, .probe = ucb1400_core_probe, .remove = ucb1400_core_remove, }; static int __init ucb1400_core_init(void) { return driver_register(&ucb1400_core_driver); } static void __exit ucb1400_core_exit(void) { driver_unregister(&ucb1400_core_driver); } module_init(ucb1400_core_init); module_exit(ucb1400_core_exit); MODULE_DESCRIPTION("Philips UCB1400 driver"); MODULE_LICENSE("GPL");