1/* 2 * Core functions for: 3 * Philips UCB1400 multifunction chip 4 * 5 * Based on ucb1400_ts.c: 6 * Author: Nicolas Pitre 7 * Created: September 25, 2006 8 * Copyright: MontaVista Software, Inc. 9 * 10 * Spliting done by: Marek Vasut <marek.vasut@gmail.com> 11 * If something doesnt work and it worked before spliting, e-mail me, 12 * dont bother Nicolas please ;-) 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License version 2 as 16 * published by the Free Software Foundation. 17 * 18 * This code is heavily based on ucb1x00-*.c copyrighted by Russell King 19 * covering the UCB1100, UCB1200 and UCB1300.. Support for the UCB1400 has 20 * been made separate from ucb1x00-core/ucb1x00-ts on Russell's request. 21 */ 22 23#include <linux/module.h> 24#include <linux/sched.h> 25#include <linux/slab.h> 26#include <linux/ucb1400.h> 27 28unsigned int ucb1400_adc_read(struct snd_ac97 *ac97, u16 adc_channel, 29 int adcsync) 30{ 31 unsigned int val; 32 33 if (adcsync) 34 adc_channel |= UCB_ADC_SYNC_ENA; 35 36 ucb1400_reg_write(ac97, UCB_ADC_CR, UCB_ADC_ENA | adc_channel); 37 ucb1400_reg_write(ac97, UCB_ADC_CR, UCB_ADC_ENA | adc_channel | 38 UCB_ADC_START); 39 40 while (!((val = ucb1400_reg_read(ac97, UCB_ADC_DATA)) 41 & UCB_ADC_DAT_VALID)) 42 schedule_timeout_uninterruptible(1); 43 44 return val & UCB_ADC_DAT_MASK; 45} 46EXPORT_SYMBOL_GPL(ucb1400_adc_read); 47 48static int ucb1400_core_probe(struct device *dev) 49{ 50 int err; 51 struct ucb1400 *ucb; 52 struct ucb1400_ts ucb_ts; 53 struct ucb1400_gpio ucb_gpio; 54 struct snd_ac97 *ac97; 55 struct ucb1400_pdata *pdata = dev->platform_data; 56 57 memset(&ucb_ts, 0, sizeof(ucb_ts)); 58 memset(&ucb_gpio, 0, sizeof(ucb_gpio)); 59 60 ucb = kzalloc(sizeof(struct ucb1400), GFP_KERNEL); 61 if (!ucb) { 62 err = -ENOMEM; 63 goto err; 64 } 65 66 dev_set_drvdata(dev, ucb); 67 68 ac97 = to_ac97_t(dev); 69 70 ucb_ts.id = ucb1400_reg_read(ac97, UCB_ID); 71 if (ucb_ts.id != UCB_ID_1400) { 72 err = -ENODEV; 73 goto err0; 74 } 75 76 /* GPIO */ 77 ucb_gpio.ac97 = ac97; 78 ucb->ucb1400_gpio = platform_device_alloc("ucb1400_gpio", -1); 79 if (!ucb->ucb1400_gpio) { 80 err = -ENOMEM; 81 goto err0; 82 } 83 err = platform_device_add_data(ucb->ucb1400_gpio, &ucb_gpio, 84 sizeof(ucb_gpio)); 85 if (err) 86 goto err1; 87 err = platform_device_add(ucb->ucb1400_gpio); 88 if (err) 89 goto err1; 90 91 /* TOUCHSCREEN */ 92 ucb_ts.ac97 = ac97; 93 94 if (pdata != NULL && pdata->irq >= 0) 95 ucb_ts.irq = pdata->irq; 96 else 97 ucb_ts.irq = -1; 98 99 ucb->ucb1400_ts = platform_device_alloc("ucb1400_ts", -1); 100 if (!ucb->ucb1400_ts) { 101 err = -ENOMEM; 102 goto err2; 103 } 104 err = platform_device_add_data(ucb->ucb1400_ts, &ucb_ts, 105 sizeof(ucb_ts)); 106 if (err) 107 goto err3; 108 err = platform_device_add(ucb->ucb1400_ts); 109 if (err) 110 goto err3; 111 112 return 0; 113 114err3: 115 platform_device_put(ucb->ucb1400_ts); 116err2: 117 platform_device_del(ucb->ucb1400_gpio); 118err1: 119 platform_device_put(ucb->ucb1400_gpio); 120err0: 121 kfree(ucb); 122err: 123 return err; 124} 125 126static int ucb1400_core_remove(struct device *dev) 127{ 128 struct ucb1400 *ucb = dev_get_drvdata(dev); 129 130 platform_device_unregister(ucb->ucb1400_ts); 131 platform_device_unregister(ucb->ucb1400_gpio); 132 133 kfree(ucb); 134 return 0; 135} 136 137static struct device_driver ucb1400_core_driver = { 138 .name = "ucb1400_core", 139 .bus = &ac97_bus_type, 140 .probe = ucb1400_core_probe, 141 .remove = ucb1400_core_remove, 142}; 143 144static int __init ucb1400_core_init(void) 145{ 146 return driver_register(&ucb1400_core_driver); 147} 148 149static void __exit ucb1400_core_exit(void) 150{ 151 driver_unregister(&ucb1400_core_driver); 152} 153 154module_init(ucb1400_core_init); 155module_exit(ucb1400_core_exit); 156 157MODULE_DESCRIPTION("Philips UCB1400 driver"); 158MODULE_LICENSE("GPL"); 159