i2c-pca-platform.c revision 2378bc09b91b0702fac7823828a614fd8016a29f
1244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang/* 2244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang * i2c_pca_platform.c 3244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang * 4244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang * Platform driver for the PCA9564 I2C controller. 5244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang * 6244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang * Copyright (C) 2008 Pengutronix 7244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang * 8244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang * This program is free software; you can redistribute it and/or modify 9244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang * it under the terms of the GNU General Public License version 2 as 10244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang * published by the Free Software Foundation. 11244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 12244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang */ 13244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang#include <linux/kernel.h> 14244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang#include <linux/module.h> 15244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang#include <linux/init.h> 16244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang#include <linux/slab.h> 17244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang#include <linux/delay.h> 182378bc09b91b0702fac7823828a614fd8016a29fWolfram Sang#include <linux/jiffies.h> 19244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang#include <linux/errno.h> 20244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang#include <linux/i2c.h> 21244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang#include <linux/interrupt.h> 22244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang#include <linux/platform_device.h> 23244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang#include <linux/i2c-algo-pca.h> 24244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang#include <linux/i2c-pca-platform.h> 25244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang#include <linux/gpio.h> 26244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 27244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang#include <asm/irq.h> 28244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang#include <asm/io.h> 29244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 30244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang#define res_len(r) ((r)->end - (r)->start + 1) 31244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 32244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstruct i2c_pca_pf_data { 33244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang void __iomem *reg_base; 34244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang int irq; /* if 0, use polling */ 35244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang int gpio; 36244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang wait_queue_head_t wait; 37244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_adapter adap; 38244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_algo_pca_data algo_data; 39244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang unsigned long io_base; 40244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang unsigned long io_size; 41244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang}; 42244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 43244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang/* Read/Write functions for different register alignments */ 44244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 45244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic int i2c_pca_pf_readbyte8(void *pd, int reg) 46244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 47244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c = pd; 48244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang return ioread8(i2c->reg_base + reg); 49244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 50244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 51244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic int i2c_pca_pf_readbyte16(void *pd, int reg) 52244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 53244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c = pd; 54244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang return ioread8(i2c->reg_base + reg * 2); 55244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 56244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 57244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic int i2c_pca_pf_readbyte32(void *pd, int reg) 58244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 59244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c = pd; 60244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang return ioread8(i2c->reg_base + reg * 4); 61244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 62244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 63244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic void i2c_pca_pf_writebyte8(void *pd, int reg, int val) 64244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 65244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c = pd; 66244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang iowrite8(val, i2c->reg_base + reg); 67244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 68244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 69244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic void i2c_pca_pf_writebyte16(void *pd, int reg, int val) 70244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 71244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c = pd; 72244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang iowrite8(val, i2c->reg_base + reg * 2); 73244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 74244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 75244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic void i2c_pca_pf_writebyte32(void *pd, int reg, int val) 76244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 77244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c = pd; 78244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang iowrite8(val, i2c->reg_base + reg * 4); 79244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 80244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 81244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 82244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic int i2c_pca_pf_waitforcompletion(void *pd) 83244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 84244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c = pd; 852378bc09b91b0702fac7823828a614fd8016a29fWolfram Sang long ret = ~0; 862378bc09b91b0702fac7823828a614fd8016a29fWolfram Sang unsigned long timeout; 87244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 88244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (i2c->irq) { 892378bc09b91b0702fac7823828a614fd8016a29fWolfram Sang ret = wait_event_interruptible_timeout(i2c->wait, 90244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.read_byte(i2c, I2C_PCA_CON) 912378bc09b91b0702fac7823828a614fd8016a29fWolfram Sang & I2C_PCA_CON_SI, i2c->adap.timeout); 92244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } else { 932378bc09b91b0702fac7823828a614fd8016a29fWolfram Sang /* Do polling */ 942378bc09b91b0702fac7823828a614fd8016a29fWolfram Sang timeout = jiffies + i2c->adap.timeout; 952378bc09b91b0702fac7823828a614fd8016a29fWolfram Sang while (((i2c->algo_data.read_byte(i2c, I2C_PCA_CON) 96244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang & I2C_PCA_CON_SI) == 0) 972378bc09b91b0702fac7823828a614fd8016a29fWolfram Sang && (ret = time_before(jiffies, timeout))) 98244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang udelay(100); 99244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } 100244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 1012378bc09b91b0702fac7823828a614fd8016a29fWolfram Sang return ret > 0; 102244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 103244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 104244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic void i2c_pca_pf_dummyreset(void *pd) 105244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 106244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c = pd; 107244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang printk(KERN_WARNING "%s: No reset-pin found. Chip may get stuck!\n", 108244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->adap.name); 109244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 110244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 111244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic void i2c_pca_pf_resetchip(void *pd) 112244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 113244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c = pd; 114244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 115244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang gpio_set_value(i2c->gpio, 0); 116244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang ndelay(100); 117244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang gpio_set_value(i2c->gpio, 1); 118244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 119244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 120244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic irqreturn_t i2c_pca_pf_handler(int this_irq, void *dev_id) 121244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 122244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c = dev_id; 123244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 124244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if ((i2c->algo_data.read_byte(i2c, I2C_PCA_CON) & I2C_PCA_CON_SI) == 0) 125244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang return IRQ_NONE; 126244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 127244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang wake_up_interruptible(&i2c->wait); 128244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 129244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang return IRQ_HANDLED; 130244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 131244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 132244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 133244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic int __devinit i2c_pca_pf_probe(struct platform_device *pdev) 134244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 135244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c; 136244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct resource *res; 137244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca9564_pf_platform_data *platform_data = 138244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang pdev->dev.platform_data; 139244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang int ret = 0; 140244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang int irq; 141244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 142244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 143244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang irq = platform_get_irq(pdev, 0); 144244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang /* If irq is 0, we do polling. */ 145244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 146244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (res == NULL) { 147244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang ret = -ENODEV; 148244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang goto e_print; 149244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } 150244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 151244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (!request_mem_region(res->start, res_len(res), res->name)) { 152244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang ret = -ENOMEM; 153244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang goto e_print; 154244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } 155244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 156244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c = kzalloc(sizeof(struct i2c_pca_pf_data), GFP_KERNEL); 157244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (!i2c) { 158244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang ret = -ENOMEM; 159244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang goto e_alloc; 160244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } 161244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 162244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang init_waitqueue_head(&i2c->wait); 163244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 164244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->reg_base = ioremap(res->start, res_len(res)); 165244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (!i2c->reg_base) { 1667650da023eb05426812bbf8999b69dc93fee67abWolfram Sang ret = -ENOMEM; 167244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang goto e_remap; 168244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } 169244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->io_base = res->start; 170244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->io_size = res_len(res); 171244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->irq = irq; 172244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 173244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->adap.nr = pdev->id >= 0 ? pdev->id : 0; 174244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->adap.owner = THIS_MODULE; 175eff9ec95efaaf6b12d230f0ea7d3c295d3bc9d57Marco Aurelio da Costa snprintf(i2c->adap.name, sizeof(i2c->adap.name), 176eff9ec95efaaf6b12d230f0ea7d3c295d3bc9d57Marco Aurelio da Costa "PCA9564/PCA9665 at 0x%08lx", 177eff9ec95efaaf6b12d230f0ea7d3c295d3bc9d57Marco Aurelio da Costa (unsigned long) res->start); 178244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->adap.algo_data = &i2c->algo_data; 179244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->adap.dev.parent = &pdev->dev; 180244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->adap.timeout = platform_data->timeout; 181244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 182244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.i2c_clock = platform_data->i2c_clock_speed; 183244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.data = i2c; 184244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 185244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang switch (res->flags & IORESOURCE_MEM_TYPE_MASK) { 186244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang case IORESOURCE_MEM_32BIT: 187244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.write_byte = i2c_pca_pf_writebyte32; 188244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.read_byte = i2c_pca_pf_readbyte32; 189244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang break; 190244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang case IORESOURCE_MEM_16BIT: 191244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.write_byte = i2c_pca_pf_writebyte16; 192244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.read_byte = i2c_pca_pf_readbyte16; 193244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang break; 194244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang case IORESOURCE_MEM_8BIT: 195244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang default: 196244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.write_byte = i2c_pca_pf_writebyte8; 197244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.read_byte = i2c_pca_pf_readbyte8; 198244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang break; 199244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } 200244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 201244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.wait_for_completion = i2c_pca_pf_waitforcompletion; 202244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 203244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->gpio = platform_data->gpio; 204244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.reset_chip = i2c_pca_pf_dummyreset; 205244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 206244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang /* Use gpio_is_valid() when in mainline */ 207244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (i2c->gpio > -1) { 208244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang ret = gpio_request(i2c->gpio, i2c->adap.name); 209244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (ret == 0) { 210244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang gpio_direction_output(i2c->gpio, 1); 211244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.reset_chip = i2c_pca_pf_resetchip; 212244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } else { 213244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang printk(KERN_WARNING "%s: Registering gpio failed!\n", 214244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->adap.name); 215244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->gpio = ret; 216244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } 217244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } 218244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 219244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (irq) { 220244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang ret = request_irq(irq, i2c_pca_pf_handler, 221244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang IRQF_TRIGGER_FALLING, i2c->adap.name, i2c); 222244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (ret) 223244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang goto e_reqirq; 224244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } 225244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 226244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (i2c_pca_add_numbered_bus(&i2c->adap) < 0) { 227244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang ret = -ENODEV; 228244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang goto e_adapt; 229244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } 230244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 231244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang platform_set_drvdata(pdev, i2c); 232244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 233244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang printk(KERN_INFO "%s registered.\n", i2c->adap.name); 234244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 235244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang return 0; 236244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 237244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sange_adapt: 238244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (irq) 239244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang free_irq(irq, i2c); 240244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sange_reqirq: 241244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (i2c->gpio > -1) 242244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang gpio_free(i2c->gpio); 243244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 244244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang iounmap(i2c->reg_base); 245244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sange_remap: 246244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang kfree(i2c); 247244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sange_alloc: 248244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang release_mem_region(res->start, res_len(res)); 249244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sange_print: 250eff9ec95efaaf6b12d230f0ea7d3c295d3bc9d57Marco Aurelio da Costa printk(KERN_ERR "Registering PCA9564/PCA9665 FAILED! (%d)\n", ret); 251244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang return ret; 252244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 253244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 254244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic int __devexit i2c_pca_pf_remove(struct platform_device *pdev) 255244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 256244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c = platform_get_drvdata(pdev); 257244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang platform_set_drvdata(pdev, NULL); 258244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 259244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c_del_adapter(&i2c->adap); 260244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 261244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (i2c->irq) 262244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang free_irq(i2c->irq, i2c); 263244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 264244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (i2c->gpio > -1) 265244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang gpio_free(i2c->gpio); 266244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 267244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang iounmap(i2c->reg_base); 268244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang release_mem_region(i2c->io_base, i2c->io_size); 269244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang kfree(i2c); 270244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 271244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang return 0; 272244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 273244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 274244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic struct platform_driver i2c_pca_pf_driver = { 275244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang .probe = i2c_pca_pf_probe, 276244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang .remove = __devexit_p(i2c_pca_pf_remove), 277244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang .driver = { 278244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang .name = "i2c-pca-platform", 279244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang .owner = THIS_MODULE, 280244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang }, 281244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang}; 282244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 283244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic int __init i2c_pca_pf_init(void) 284244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 285244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang return platform_driver_register(&i2c_pca_pf_driver); 286244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 287244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 288244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic void __exit i2c_pca_pf_exit(void) 289244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 290244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang platform_driver_unregister(&i2c_pca_pf_driver); 291244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 292244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 293244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram SangMODULE_AUTHOR("Wolfram Sang <w.sang@pengutronix.de>"); 294eff9ec95efaaf6b12d230f0ea7d3c295d3bc9d57Marco Aurelio da CostaMODULE_DESCRIPTION("I2C-PCA9564/PCA9665 platform driver"); 295244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram SangMODULE_LICENSE("GPL"); 296244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 297244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangmodule_init(i2c_pca_pf_init); 298244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangmodule_exit(i2c_pca_pf_exit); 299244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 300