113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro/* 213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro * Driver for Motorola PCAP2 as present in EZX phones 313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro * 413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro * Copyright (C) 2006 Harald Welte <laforge@openezx.org> 513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro * Copyright (C) 2009 Daniel Ribeiro <drwyrm@gmail.com> 613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro * 713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro * This program is free software; you can redistribute it and/or modify 813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro * it under the terms of the GNU General Public License version 2 as 913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro * published by the Free Software Foundation. 1013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro * 1113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro */ 1213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 1313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro#include <linux/module.h> 1413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro#include <linux/kernel.h> 1513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro#include <linux/platform_device.h> 1613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro#include <linux/interrupt.h> 1713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro#include <linux/irq.h> 1813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro#include <linux/mfd/ezx-pcap.h> 1913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro#include <linux/spi/spi.h> 20b1148fd46c248c8f6c9f3beb79f27cdd83702621Daniel Ribeiro#include <linux/gpio.h> 215a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 2213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 2313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro#define PCAP_ADC_MAXQ 8 2413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeirostruct pcap_adc_request { 2513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro u8 bank; 2613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro u8 ch[2]; 2713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro u32 flags; 2813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro void (*callback)(void *, u16[]); 2913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro void *data; 3013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro}; 3113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 3213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeirostruct pcap_adc_sync_request { 3313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro u16 res[2]; 3413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro struct completion completion; 3513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro}; 3613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 3713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeirostruct pcap_chip { 3813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro struct spi_device *spi; 3913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 4013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro /* IO */ 4113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro u32 buf; 4213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro struct mutex io_mutex; 4313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 4413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro /* IRQ */ 4513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro unsigned int irq_base; 4613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro u32 msr; 4713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro struct work_struct isr_work; 4813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro struct work_struct msr_work; 4913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro struct workqueue_struct *workqueue; 5013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 5113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro /* ADC */ 5213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro struct pcap_adc_request *adc_queue[PCAP_ADC_MAXQ]; 5313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro u8 adc_head; 5413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro u8 adc_tail; 5513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro struct mutex adc_mutex; 5613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro}; 5713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 5813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro/* IO */ 5913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeirostatic int ezx_pcap_putget(struct pcap_chip *pcap, u32 *data) 6013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro{ 6113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro struct spi_transfer t; 6213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro struct spi_message m; 6313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro int status; 6413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 6513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro memset(&t, 0, sizeof t); 6613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro spi_message_init(&m); 6713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro t.len = sizeof(u32); 6813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro spi_message_add_tail(&t, &m); 6913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 7013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro pcap->buf = *data; 7113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro t.tx_buf = (u8 *) &pcap->buf; 7213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro t.rx_buf = (u8 *) &pcap->buf; 7313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro status = spi_sync(pcap->spi, &m); 7413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 7513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro if (status == 0) 7613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro *data = pcap->buf; 7713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 7813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro return status; 7913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro} 8013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 8113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiroint ezx_pcap_write(struct pcap_chip *pcap, u8 reg_num, u32 value) 8213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro{ 8313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro int ret; 8413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 8513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro mutex_lock(&pcap->io_mutex); 8613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro value &= PCAP_REGISTER_VALUE_MASK; 8713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro value |= PCAP_REGISTER_WRITE_OP_BIT 8813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro | (reg_num << PCAP_REGISTER_ADDRESS_SHIFT); 8913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro ret = ezx_pcap_putget(pcap, &value); 9013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro mutex_unlock(&pcap->io_mutex); 9113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 9213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro return ret; 9313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro} 9413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel RibeiroEXPORT_SYMBOL_GPL(ezx_pcap_write); 9513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 9613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiroint ezx_pcap_read(struct pcap_chip *pcap, u8 reg_num, u32 *value) 9713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro{ 9813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro int ret; 9913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 10013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro mutex_lock(&pcap->io_mutex); 10113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro *value = PCAP_REGISTER_READ_OP_BIT 10213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro | (reg_num << PCAP_REGISTER_ADDRESS_SHIFT); 10313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 10413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro ret = ezx_pcap_putget(pcap, value); 10513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro mutex_unlock(&pcap->io_mutex); 10613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 10713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro return ret; 10813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro} 10913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel RibeiroEXPORT_SYMBOL_GPL(ezx_pcap_read); 11013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 111e9a22635b0d794d0cb242ffb0249f7b2a410bca2Daniel Ribeiroint ezx_pcap_set_bits(struct pcap_chip *pcap, u8 reg_num, u32 mask, u32 val) 112e9a22635b0d794d0cb242ffb0249f7b2a410bca2Daniel Ribeiro{ 113e9a22635b0d794d0cb242ffb0249f7b2a410bca2Daniel Ribeiro int ret; 114e9a22635b0d794d0cb242ffb0249f7b2a410bca2Daniel Ribeiro u32 tmp = PCAP_REGISTER_READ_OP_BIT | 115e9a22635b0d794d0cb242ffb0249f7b2a410bca2Daniel Ribeiro (reg_num << PCAP_REGISTER_ADDRESS_SHIFT); 116e9a22635b0d794d0cb242ffb0249f7b2a410bca2Daniel Ribeiro 117e9a22635b0d794d0cb242ffb0249f7b2a410bca2Daniel Ribeiro mutex_lock(&pcap->io_mutex); 118e9a22635b0d794d0cb242ffb0249f7b2a410bca2Daniel Ribeiro ret = ezx_pcap_putget(pcap, &tmp); 119e9a22635b0d794d0cb242ffb0249f7b2a410bca2Daniel Ribeiro if (ret) 120e9a22635b0d794d0cb242ffb0249f7b2a410bca2Daniel Ribeiro goto out_unlock; 121e9a22635b0d794d0cb242ffb0249f7b2a410bca2Daniel Ribeiro 122e9a22635b0d794d0cb242ffb0249f7b2a410bca2Daniel Ribeiro tmp &= (PCAP_REGISTER_VALUE_MASK & ~mask); 123e9a22635b0d794d0cb242ffb0249f7b2a410bca2Daniel Ribeiro tmp |= (val & mask) | PCAP_REGISTER_WRITE_OP_BIT | 124e9a22635b0d794d0cb242ffb0249f7b2a410bca2Daniel Ribeiro (reg_num << PCAP_REGISTER_ADDRESS_SHIFT); 125e9a22635b0d794d0cb242ffb0249f7b2a410bca2Daniel Ribeiro 126e9a22635b0d794d0cb242ffb0249f7b2a410bca2Daniel Ribeiro ret = ezx_pcap_putget(pcap, &tmp); 127e9a22635b0d794d0cb242ffb0249f7b2a410bca2Daniel Ribeiroout_unlock: 128e9a22635b0d794d0cb242ffb0249f7b2a410bca2Daniel Ribeiro mutex_unlock(&pcap->io_mutex); 129e9a22635b0d794d0cb242ffb0249f7b2a410bca2Daniel Ribeiro 130e9a22635b0d794d0cb242ffb0249f7b2a410bca2Daniel Ribeiro return ret; 131e9a22635b0d794d0cb242ffb0249f7b2a410bca2Daniel Ribeiro} 132e9a22635b0d794d0cb242ffb0249f7b2a410bca2Daniel RibeiroEXPORT_SYMBOL_GPL(ezx_pcap_set_bits); 133e9a22635b0d794d0cb242ffb0249f7b2a410bca2Daniel Ribeiro 13413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro/* IRQ */ 1359f7b07d6cc3ed14783c9427a5b2a69794eb2de64Daniel Ribeiroint irq_to_pcap(struct pcap_chip *pcap, int irq) 13613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro{ 1379f7b07d6cc3ed14783c9427a5b2a69794eb2de64Daniel Ribeiro return irq - pcap->irq_base; 13813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro} 1399f7b07d6cc3ed14783c9427a5b2a69794eb2de64Daniel RibeiroEXPORT_SYMBOL_GPL(irq_to_pcap); 14013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 14113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiroint pcap_to_irq(struct pcap_chip *pcap, int irq) 14213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro{ 14313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro return pcap->irq_base + irq; 14413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro} 14513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel RibeiroEXPORT_SYMBOL_GPL(pcap_to_irq); 14613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 147c232f22fc6aac1797d0ca9beddddf0fea4beb7f3Lennert Buytenhekstatic void pcap_mask_irq(struct irq_data *d) 14813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro{ 149c232f22fc6aac1797d0ca9beddddf0fea4beb7f3Lennert Buytenhek struct pcap_chip *pcap = irq_data_get_irq_chip_data(d); 15013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 151c232f22fc6aac1797d0ca9beddddf0fea4beb7f3Lennert Buytenhek pcap->msr |= 1 << irq_to_pcap(pcap, d->irq); 15213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro queue_work(pcap->workqueue, &pcap->msr_work); 15313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro} 15413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 155c232f22fc6aac1797d0ca9beddddf0fea4beb7f3Lennert Buytenhekstatic void pcap_unmask_irq(struct irq_data *d) 15613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro{ 157c232f22fc6aac1797d0ca9beddddf0fea4beb7f3Lennert Buytenhek struct pcap_chip *pcap = irq_data_get_irq_chip_data(d); 15813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 159c232f22fc6aac1797d0ca9beddddf0fea4beb7f3Lennert Buytenhek pcap->msr &= ~(1 << irq_to_pcap(pcap, d->irq)); 16013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro queue_work(pcap->workqueue, &pcap->msr_work); 16113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro} 16213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 16313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeirostatic struct irq_chip pcap_irq_chip = { 164c232f22fc6aac1797d0ca9beddddf0fea4beb7f3Lennert Buytenhek .name = "pcap", 16573a6839fdb7f3f5ac7bfaee0796dd7647b9c9376Thomas Gleixner .irq_disable = pcap_mask_irq, 166c232f22fc6aac1797d0ca9beddddf0fea4beb7f3Lennert Buytenhek .irq_mask = pcap_mask_irq, 167c232f22fc6aac1797d0ca9beddddf0fea4beb7f3Lennert Buytenhek .irq_unmask = pcap_unmask_irq, 16813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro}; 16913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 17013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeirostatic void pcap_msr_work(struct work_struct *work) 17113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro{ 17213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro struct pcap_chip *pcap = container_of(work, struct pcap_chip, msr_work); 17313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 17413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro ezx_pcap_write(pcap, PCAP_REG_MSR, pcap->msr); 17513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro} 17613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 17713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeirostatic void pcap_isr_work(struct work_struct *work) 17813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro{ 17913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro struct pcap_chip *pcap = container_of(work, struct pcap_chip, isr_work); 18013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro struct pcap_platform_data *pdata = pcap->spi->dev.platform_data; 18113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro u32 msr, isr, int_sel, service; 18213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro int irq; 18313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 184b1148fd46c248c8f6c9f3beb79f27cdd83702621Daniel Ribeiro do { 185b1148fd46c248c8f6c9f3beb79f27cdd83702621Daniel Ribeiro ezx_pcap_read(pcap, PCAP_REG_MSR, &msr); 186b1148fd46c248c8f6c9f3beb79f27cdd83702621Daniel Ribeiro ezx_pcap_read(pcap, PCAP_REG_ISR, &isr); 18713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 18825985edcedea6396277003854657b5f3cb31a628Lucas De Marchi /* We can't service/ack irqs that are assigned to port 2 */ 189b1148fd46c248c8f6c9f3beb79f27cdd83702621Daniel Ribeiro if (!(pdata->config & PCAP_SECOND_PORT)) { 190b1148fd46c248c8f6c9f3beb79f27cdd83702621Daniel Ribeiro ezx_pcap_read(pcap, PCAP_REG_INT_SEL, &int_sel); 191b1148fd46c248c8f6c9f3beb79f27cdd83702621Daniel Ribeiro isr &= ~int_sel; 192b1148fd46c248c8f6c9f3beb79f27cdd83702621Daniel Ribeiro } 19313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 194b1148fd46c248c8f6c9f3beb79f27cdd83702621Daniel Ribeiro ezx_pcap_write(pcap, PCAP_REG_MSR, isr | msr); 195b1148fd46c248c8f6c9f3beb79f27cdd83702621Daniel Ribeiro ezx_pcap_write(pcap, PCAP_REG_ISR, isr); 19613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 197b1148fd46c248c8f6c9f3beb79f27cdd83702621Daniel Ribeiro local_irq_disable(); 198b1148fd46c248c8f6c9f3beb79f27cdd83702621Daniel Ribeiro service = isr & ~msr; 199b1148fd46c248c8f6c9f3beb79f27cdd83702621Daniel Ribeiro for (irq = pcap->irq_base; service; service >>= 1, irq++) { 20073a6839fdb7f3f5ac7bfaee0796dd7647b9c9376Thomas Gleixner if (service & 1) 20173a6839fdb7f3f5ac7bfaee0796dd7647b9c9376Thomas Gleixner generic_handle_irq(irq); 20213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro } 203b1148fd46c248c8f6c9f3beb79f27cdd83702621Daniel Ribeiro local_irq_enable(); 204b1148fd46c248c8f6c9f3beb79f27cdd83702621Daniel Ribeiro ezx_pcap_write(pcap, PCAP_REG_MSR, pcap->msr); 205b1148fd46c248c8f6c9f3beb79f27cdd83702621Daniel Ribeiro } while (gpio_get_value(irq_to_gpio(pcap->spi->irq))); 20613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro} 20713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 20813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeirostatic void pcap_irq_handler(unsigned int irq, struct irq_desc *desc) 20913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro{ 210d5bb122165981aed327845c32a9916d1b8ae0e4bThomas Gleixner struct pcap_chip *pcap = irq_get_handler_data(irq); 21113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 212c232f22fc6aac1797d0ca9beddddf0fea4beb7f3Lennert Buytenhek desc->irq_data.chip->irq_ack(&desc->irq_data); 21313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro queue_work(pcap->workqueue, &pcap->isr_work); 21413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro return; 21513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro} 21613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 21713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro/* ADC */ 218ecd78cbdb989fd593bf4fd69cdb572200e70a553Daniel Ribeirovoid pcap_set_ts_bits(struct pcap_chip *pcap, u32 bits) 219ecd78cbdb989fd593bf4fd69cdb572200e70a553Daniel Ribeiro{ 220ecd78cbdb989fd593bf4fd69cdb572200e70a553Daniel Ribeiro u32 tmp; 221ecd78cbdb989fd593bf4fd69cdb572200e70a553Daniel Ribeiro 222ecd78cbdb989fd593bf4fd69cdb572200e70a553Daniel Ribeiro mutex_lock(&pcap->adc_mutex); 223ecd78cbdb989fd593bf4fd69cdb572200e70a553Daniel Ribeiro ezx_pcap_read(pcap, PCAP_REG_ADC, &tmp); 224ecd78cbdb989fd593bf4fd69cdb572200e70a553Daniel Ribeiro tmp &= ~(PCAP_ADC_TS_M_MASK | PCAP_ADC_TS_REF_LOWPWR); 225ecd78cbdb989fd593bf4fd69cdb572200e70a553Daniel Ribeiro tmp |= bits & (PCAP_ADC_TS_M_MASK | PCAP_ADC_TS_REF_LOWPWR); 226ecd78cbdb989fd593bf4fd69cdb572200e70a553Daniel Ribeiro ezx_pcap_write(pcap, PCAP_REG_ADC, tmp); 227ecd78cbdb989fd593bf4fd69cdb572200e70a553Daniel Ribeiro mutex_unlock(&pcap->adc_mutex); 228ecd78cbdb989fd593bf4fd69cdb572200e70a553Daniel Ribeiro} 229ecd78cbdb989fd593bf4fd69cdb572200e70a553Daniel RibeiroEXPORT_SYMBOL_GPL(pcap_set_ts_bits); 230ecd78cbdb989fd593bf4fd69cdb572200e70a553Daniel Ribeiro 23113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeirostatic void pcap_disable_adc(struct pcap_chip *pcap) 23213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro{ 23313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro u32 tmp; 23413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 23513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro ezx_pcap_read(pcap, PCAP_REG_ADC, &tmp); 23613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro tmp &= ~(PCAP_ADC_ADEN|PCAP_ADC_BATT_I_ADC|PCAP_ADC_BATT_I_POLARITY); 23713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro ezx_pcap_write(pcap, PCAP_REG_ADC, tmp); 23813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro} 23913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 24013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeirostatic void pcap_adc_trigger(struct pcap_chip *pcap) 24113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro{ 24213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro u32 tmp; 24313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro u8 head; 24413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 24513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro mutex_lock(&pcap->adc_mutex); 24613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro head = pcap->adc_head; 24713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro if (!pcap->adc_queue[head]) { 24813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro /* queue is empty, save power */ 24913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro pcap_disable_adc(pcap); 25013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro mutex_unlock(&pcap->adc_mutex); 25113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro return; 25213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro } 253ecd78cbdb989fd593bf4fd69cdb572200e70a553Daniel Ribeiro /* start conversion on requested bank, save TS_M bits */ 254ecd78cbdb989fd593bf4fd69cdb572200e70a553Daniel Ribeiro ezx_pcap_read(pcap, PCAP_REG_ADC, &tmp); 255ecd78cbdb989fd593bf4fd69cdb572200e70a553Daniel Ribeiro tmp &= (PCAP_ADC_TS_M_MASK | PCAP_ADC_TS_REF_LOWPWR); 256ecd78cbdb989fd593bf4fd69cdb572200e70a553Daniel Ribeiro tmp |= pcap->adc_queue[head]->flags | PCAP_ADC_ADEN; 25713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 25813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro if (pcap->adc_queue[head]->bank == PCAP_ADC_BANK_1) 25913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro tmp |= PCAP_ADC_AD_SEL1; 26013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 26113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro ezx_pcap_write(pcap, PCAP_REG_ADC, tmp); 262ecd78cbdb989fd593bf4fd69cdb572200e70a553Daniel Ribeiro mutex_unlock(&pcap->adc_mutex); 26313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro ezx_pcap_write(pcap, PCAP_REG_ADR, PCAP_ADR_ASC); 26413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro} 26513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 26613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeirostatic irqreturn_t pcap_adc_irq(int irq, void *_pcap) 26713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro{ 26813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro struct pcap_chip *pcap = _pcap; 26913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro struct pcap_adc_request *req; 27013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro u16 res[2]; 27113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro u32 tmp; 27213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 27313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro mutex_lock(&pcap->adc_mutex); 27413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro req = pcap->adc_queue[pcap->adc_head]; 27513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 276e0084aa9e0ce157a5f53d9d39657a00d24dc6a66Joe Perches if (WARN(!req, "adc irq without pending request\n")) { 2771c90ea2c7eb3b24a07a2f82164323588fb029bc1Daniel Ribeiro mutex_unlock(&pcap->adc_mutex); 27813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro return IRQ_HANDLED; 2791c90ea2c7eb3b24a07a2f82164323588fb029bc1Daniel Ribeiro } 28013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 28113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro /* read requested channels results */ 28213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro ezx_pcap_read(pcap, PCAP_REG_ADC, &tmp); 28313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro tmp &= ~(PCAP_ADC_ADA1_MASK | PCAP_ADC_ADA2_MASK); 28413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro tmp |= (req->ch[0] << PCAP_ADC_ADA1_SHIFT); 28513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro tmp |= (req->ch[1] << PCAP_ADC_ADA2_SHIFT); 28613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro ezx_pcap_write(pcap, PCAP_REG_ADC, tmp); 28713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro ezx_pcap_read(pcap, PCAP_REG_ADR, &tmp); 28813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro res[0] = (tmp & PCAP_ADR_ADD1_MASK) >> PCAP_ADR_ADD1_SHIFT; 28913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro res[1] = (tmp & PCAP_ADR_ADD2_MASK) >> PCAP_ADR_ADD2_SHIFT; 29013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 29113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro pcap->adc_queue[pcap->adc_head] = NULL; 29213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro pcap->adc_head = (pcap->adc_head + 1) & (PCAP_ADC_MAXQ - 1); 29313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro mutex_unlock(&pcap->adc_mutex); 29413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 29513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro /* pass the results and release memory */ 29613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro req->callback(req->data, res); 29713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro kfree(req); 29813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 29913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro /* trigger next conversion (if any) on queue */ 30013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro pcap_adc_trigger(pcap); 30113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 30213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro return IRQ_HANDLED; 30313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro} 30413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 30513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiroint pcap_adc_async(struct pcap_chip *pcap, u8 bank, u32 flags, u8 ch[], 30613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro void *callback, void *data) 30713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro{ 30813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro struct pcap_adc_request *req; 30913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 31013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro /* This will be freed after we have a result */ 31113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro req = kmalloc(sizeof(struct pcap_adc_request), GFP_KERNEL); 31213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro if (!req) 31313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro return -ENOMEM; 31413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 31513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro req->bank = bank; 31613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro req->flags = flags; 31713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro req->ch[0] = ch[0]; 31813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro req->ch[1] = ch[1]; 31913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro req->callback = callback; 32013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro req->data = data; 32113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 32213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro mutex_lock(&pcap->adc_mutex); 32313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro if (pcap->adc_queue[pcap->adc_tail]) { 32413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro mutex_unlock(&pcap->adc_mutex); 32513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro kfree(req); 32613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro return -EBUSY; 32713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro } 32813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro pcap->adc_queue[pcap->adc_tail] = req; 32913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro pcap->adc_tail = (pcap->adc_tail + 1) & (PCAP_ADC_MAXQ - 1); 33013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro mutex_unlock(&pcap->adc_mutex); 33113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 33213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro /* start conversion */ 33313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro pcap_adc_trigger(pcap); 33413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 33513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro return 0; 33613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro} 33713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel RibeiroEXPORT_SYMBOL_GPL(pcap_adc_async); 33813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 33913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeirostatic void pcap_adc_sync_cb(void *param, u16 res[]) 34013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro{ 34113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro struct pcap_adc_sync_request *req = param; 34213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 34313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro req->res[0] = res[0]; 34413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro req->res[1] = res[1]; 34513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro complete(&req->completion); 34613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro} 34713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 34813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiroint pcap_adc_sync(struct pcap_chip *pcap, u8 bank, u32 flags, u8 ch[], 34913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro u16 res[]) 35013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro{ 35113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro struct pcap_adc_sync_request sync_data; 35213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro int ret; 35313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 35413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro init_completion(&sync_data.completion); 35513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro ret = pcap_adc_async(pcap, bank, flags, ch, pcap_adc_sync_cb, 35613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro &sync_data); 35713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro if (ret) 35813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro return ret; 35913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro wait_for_completion(&sync_data.completion); 36013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro res[0] = sync_data.res[0]; 36113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro res[1] = sync_data.res[1]; 36213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 36313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro return 0; 36413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro} 36513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel RibeiroEXPORT_SYMBOL_GPL(pcap_adc_sync); 36613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 36713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro/* subdevs */ 36813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeirostatic int pcap_remove_subdev(struct device *dev, void *unused) 36913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro{ 37013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro platform_device_unregister(to_platform_device(dev)); 37113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro return 0; 37213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro} 37313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 37413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeirostatic int __devinit pcap_add_subdev(struct pcap_chip *pcap, 37513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro struct pcap_subdev *subdev) 37613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro{ 37713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro struct platform_device *pdev; 37809ff21e0f670a71ea43765cedaab9246fd81540eAxel Lin int ret; 37913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 38013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro pdev = platform_device_alloc(subdev->name, subdev->id); 38109ff21e0f670a71ea43765cedaab9246fd81540eAxel Lin if (!pdev) 38209ff21e0f670a71ea43765cedaab9246fd81540eAxel Lin return -ENOMEM; 38309ff21e0f670a71ea43765cedaab9246fd81540eAxel Lin 38413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro pdev->dev.parent = &pcap->spi->dev; 38513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro pdev->dev.platform_data = subdev->platform_data; 38613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 38709ff21e0f670a71ea43765cedaab9246fd81540eAxel Lin ret = platform_device_add(pdev); 38809ff21e0f670a71ea43765cedaab9246fd81540eAxel Lin if (ret) 38909ff21e0f670a71ea43765cedaab9246fd81540eAxel Lin platform_device_put(pdev); 39009ff21e0f670a71ea43765cedaab9246fd81540eAxel Lin 39109ff21e0f670a71ea43765cedaab9246fd81540eAxel Lin return ret; 39213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro} 39313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 39413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeirostatic int __devexit ezx_pcap_remove(struct spi_device *spi) 39513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro{ 39613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro struct pcap_chip *pcap = dev_get_drvdata(&spi->dev); 39713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro struct pcap_platform_data *pdata = spi->dev.platform_data; 39813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro int i, adc_irq; 39913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 40013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro /* remove all registered subdevs */ 40113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro device_for_each_child(&spi->dev, NULL, pcap_remove_subdev); 40213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 40313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro /* cleanup ADC */ 40413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro adc_irq = pcap_to_irq(pcap, (pdata->config & PCAP_SECOND_PORT) ? 40513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro PCAP_IRQ_ADCDONE2 : PCAP_IRQ_ADCDONE); 40613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro free_irq(adc_irq, pcap); 40713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro mutex_lock(&pcap->adc_mutex); 40813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro for (i = 0; i < PCAP_ADC_MAXQ; i++) 40913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro kfree(pcap->adc_queue[i]); 41013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro mutex_unlock(&pcap->adc_mutex); 41113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 41213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro /* cleanup irqchip */ 41313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro for (i = pcap->irq_base; i < (pcap->irq_base + PCAP_NIRQS); i++) 414d5bb122165981aed327845c32a9916d1b8ae0e4bThomas Gleixner irq_set_chip_and_handler(i, NULL, NULL); 41513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 41613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro destroy_workqueue(pcap->workqueue); 41713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 41813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro kfree(pcap); 41913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 42013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro return 0; 42113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro} 42213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 42313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeirostatic int __devinit ezx_pcap_probe(struct spi_device *spi) 42413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro{ 42513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro struct pcap_platform_data *pdata = spi->dev.platform_data; 42613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro struct pcap_chip *pcap; 42713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro int i, adc_irq; 42813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro int ret = -ENODEV; 42913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 43013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro /* platform data is required */ 43113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro if (!pdata) 43213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro goto ret; 43313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 43413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro pcap = kzalloc(sizeof(*pcap), GFP_KERNEL); 43513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro if (!pcap) { 43613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro ret = -ENOMEM; 43713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro goto ret; 43813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro } 43913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 44013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro mutex_init(&pcap->io_mutex); 44113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro mutex_init(&pcap->adc_mutex); 44213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro INIT_WORK(&pcap->isr_work, pcap_isr_work); 44313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro INIT_WORK(&pcap->msr_work, pcap_msr_work); 44413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro dev_set_drvdata(&spi->dev, pcap); 44513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 44613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro /* setup spi */ 44713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro spi->bits_per_word = 32; 44813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro spi->mode = SPI_MODE_0 | (pdata->config & PCAP_CS_AH ? SPI_CS_HIGH : 0); 44913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro ret = spi_setup(spi); 45013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro if (ret) 45113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro goto free_pcap; 45213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 45313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro pcap->spi = spi; 45413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 45513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro /* setup irq */ 45613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro pcap->irq_base = pdata->irq_base; 45713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro pcap->workqueue = create_singlethread_workqueue("pcapd"); 45813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro if (!pcap->workqueue) { 45947dabaeedb4d6e841ac4d66ef249ce9c61303049Axel Lin ret = -ENOMEM; 46025985edcedea6396277003854657b5f3cb31a628Lucas De Marchi dev_err(&spi->dev, "can't create pcap thread\n"); 46113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro goto free_pcap; 46213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro } 46313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 46413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro /* redirect interrupts to AP, except adcdone2 */ 46513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro if (!(pdata->config & PCAP_SECOND_PORT)) 46613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro ezx_pcap_write(pcap, PCAP_REG_INT_SEL, 46713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro (1 << PCAP_IRQ_ADCDONE2)); 46813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 46913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro /* setup irq chip */ 47013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro for (i = pcap->irq_base; i < (pcap->irq_base + PCAP_NIRQS); i++) { 471d5bb122165981aed327845c32a9916d1b8ae0e4bThomas Gleixner irq_set_chip_and_handler(i, &pcap_irq_chip, handle_simple_irq); 472d5bb122165981aed327845c32a9916d1b8ae0e4bThomas Gleixner irq_set_chip_data(i, pcap); 47313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro#ifdef CONFIG_ARM 47413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro set_irq_flags(i, IRQF_VALID); 47513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro#else 476d5bb122165981aed327845c32a9916d1b8ae0e4bThomas Gleixner irq_set_noprobe(i); 47713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro#endif 47813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro } 47913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 48013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro /* mask/ack all PCAP interrupts */ 48113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro ezx_pcap_write(pcap, PCAP_REG_MSR, PCAP_MASK_ALL_INTERRUPT); 48213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro ezx_pcap_write(pcap, PCAP_REG_ISR, PCAP_CLEAR_INTERRUPT_REGISTER); 48313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro pcap->msr = PCAP_MASK_ALL_INTERRUPT; 48413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 485d5bb122165981aed327845c32a9916d1b8ae0e4bThomas Gleixner irq_set_irq_type(spi->irq, IRQ_TYPE_EDGE_RISING); 486d5bb122165981aed327845c32a9916d1b8ae0e4bThomas Gleixner irq_set_handler_data(spi->irq, pcap); 487d5bb122165981aed327845c32a9916d1b8ae0e4bThomas Gleixner irq_set_chained_handler(spi->irq, pcap_irq_handler); 488d5bb122165981aed327845c32a9916d1b8ae0e4bThomas Gleixner irq_set_irq_wake(spi->irq, 1); 48913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 49013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro /* ADC */ 49113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro adc_irq = pcap_to_irq(pcap, (pdata->config & PCAP_SECOND_PORT) ? 49213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro PCAP_IRQ_ADCDONE2 : PCAP_IRQ_ADCDONE); 49313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 49413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro ret = request_irq(adc_irq, pcap_adc_irq, 0, "ADC", pcap); 49513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro if (ret) 49613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro goto free_irqchip; 49713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 49813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro /* setup subdevs */ 49913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro for (i = 0; i < pdata->num_subdevs; i++) { 50013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro ret = pcap_add_subdev(pcap, &pdata->subdevs[i]); 50113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro if (ret) 50213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro goto remove_subdevs; 50313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro } 50413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 50513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro /* board specific quirks */ 50613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro if (pdata->init) 50713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro pdata->init(pcap); 50813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 50913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro return 0; 51013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 51113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiroremove_subdevs: 51213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro device_for_each_child(&spi->dev, NULL, pcap_remove_subdev); 51313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro/* free_adc: */ 51413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro free_irq(adc_irq, pcap); 51513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeirofree_irqchip: 51613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro for (i = pcap->irq_base; i < (pcap->irq_base + PCAP_NIRQS); i++) 517d5bb122165981aed327845c32a9916d1b8ae0e4bThomas Gleixner irq_set_chip_and_handler(i, NULL, NULL); 51813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro/* destroy_workqueue: */ 51913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro destroy_workqueue(pcap->workqueue); 52013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeirofree_pcap: 52113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro kfree(pcap); 52213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiroret: 52313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro return ret; 52413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro} 52513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 52613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeirostatic struct spi_driver ezxpcap_driver = { 52713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro .probe = ezx_pcap_probe, 52813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro .remove = __devexit_p(ezx_pcap_remove), 52913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro .driver = { 53013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro .name = "ezx-pcap", 53113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro .owner = THIS_MODULE, 53213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro }, 53313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro}; 53413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 53513a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeirostatic int __init ezx_pcap_init(void) 53613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro{ 53713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro return spi_register_driver(&ezxpcap_driver); 53813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro} 53913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 54013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeirostatic void __exit ezx_pcap_exit(void) 54113a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro{ 54213a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro spi_unregister_driver(&ezxpcap_driver); 54313a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro} 54413a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 545f078237bcf6d5ffe322f6de7f05c0541989a8d35Antonio Ospitesubsys_initcall(ezx_pcap_init); 54613a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiromodule_exit(ezx_pcap_exit); 54713a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel Ribeiro 54813a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel RibeiroMODULE_LICENSE("GPL"); 54913a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel RibeiroMODULE_AUTHOR("Daniel Ribeiro / Harald Welte"); 55013a09f93d2bf3a20c748e1d6a30160a00fc58169Daniel RibeiroMODULE_DESCRIPTION("Motorola PCAP2 ASIC Driver"); 551e0626e3844e8f430fc1a4417f523a00797df7ca6Anton VorontsovMODULE_ALIAS("spi:ezx-pcap"); 552