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> 262178218027e4da0608219fae1d02e5c88f4e560dH Hartley Sweeten#include <linux/io.h> 27244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 28244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang#include <asm/irq.h> 29244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 30244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstruct i2c_pca_pf_data { 31244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang void __iomem *reg_base; 32244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang int irq; /* if 0, use polling */ 33244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang int gpio; 34244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang wait_queue_head_t wait; 35244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_adapter adap; 36244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_algo_pca_data algo_data; 37244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang unsigned long io_base; 38244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang unsigned long io_size; 39244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang}; 40244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 41244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang/* Read/Write functions for different register alignments */ 42244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 43244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic int i2c_pca_pf_readbyte8(void *pd, int reg) 44244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 45244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c = pd; 46244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang return ioread8(i2c->reg_base + reg); 47244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 48244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 49244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic int i2c_pca_pf_readbyte16(void *pd, int reg) 50244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 51244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c = pd; 52244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang return ioread8(i2c->reg_base + reg * 2); 53244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 54244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 55244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic int i2c_pca_pf_readbyte32(void *pd, int reg) 56244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 57244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c = pd; 58244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang return ioread8(i2c->reg_base + reg * 4); 59244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 60244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 61244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic void i2c_pca_pf_writebyte8(void *pd, int reg, int val) 62244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 63244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c = pd; 64244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang iowrite8(val, i2c->reg_base + reg); 65244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 66244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 67244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic void i2c_pca_pf_writebyte16(void *pd, int reg, int val) 68244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 69244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c = pd; 70244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang iowrite8(val, i2c->reg_base + reg * 2); 71244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 72244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 73244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic void i2c_pca_pf_writebyte32(void *pd, int reg, int val) 74244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 75244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c = pd; 76244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang iowrite8(val, i2c->reg_base + reg * 4); 77244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 78244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 79244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 80244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic int i2c_pca_pf_waitforcompletion(void *pd) 81244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 82244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c = pd; 832378bc09b91b0702fac7823828a614fd8016a29fWolfram Sang unsigned long timeout; 846abb930af064fb1cf4177d32e2c7bfb89eee0fe5Yegor Yefremov long ret; 85244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 86244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (i2c->irq) { 8722f8b2695eda496026623020811cae34590ee3d7Wolfram Sang ret = wait_event_timeout(i2c->wait, 88244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.read_byte(i2c, I2C_PCA_CON) 892378bc09b91b0702fac7823828a614fd8016a29fWolfram Sang & I2C_PCA_CON_SI, i2c->adap.timeout); 90244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } else { 912378bc09b91b0702fac7823828a614fd8016a29fWolfram Sang /* Do polling */ 922378bc09b91b0702fac7823828a614fd8016a29fWolfram Sang timeout = jiffies + i2c->adap.timeout; 936abb930af064fb1cf4177d32e2c7bfb89eee0fe5Yegor Yefremov do { 946abb930af064fb1cf4177d32e2c7bfb89eee0fe5Yegor Yefremov ret = time_before(jiffies, timeout); 956abb930af064fb1cf4177d32e2c7bfb89eee0fe5Yegor Yefremov if (i2c->algo_data.read_byte(i2c, I2C_PCA_CON) 966abb930af064fb1cf4177d32e2c7bfb89eee0fe5Yegor Yefremov & I2C_PCA_CON_SI) 976abb930af064fb1cf4177d32e2c7bfb89eee0fe5Yegor Yefremov break; 98244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang udelay(100); 996abb930af064fb1cf4177d32e2c7bfb89eee0fe5Yegor Yefremov } while (ret); 100244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } 101244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 1022378bc09b91b0702fac7823828a614fd8016a29fWolfram Sang return ret > 0; 103244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 104244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 105244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic void i2c_pca_pf_dummyreset(void *pd) 106244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 107244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c = pd; 108244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang printk(KERN_WARNING "%s: No reset-pin found. Chip may get stuck!\n", 109244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->adap.name); 110244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 111244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 112244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic void i2c_pca_pf_resetchip(void *pd) 113244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 114244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c = pd; 115244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 116244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang gpio_set_value(i2c->gpio, 0); 117244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang ndelay(100); 118244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang gpio_set_value(i2c->gpio, 1); 119244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 120244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 121244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic irqreturn_t i2c_pca_pf_handler(int this_irq, void *dev_id) 122244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 123244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c = dev_id; 124244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 125244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if ((i2c->algo_data.read_byte(i2c, I2C_PCA_CON) & I2C_PCA_CON_SI) == 0) 126244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang return IRQ_NONE; 127244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 12822f8b2695eda496026623020811cae34590ee3d7Wolfram Sang wake_up(&i2c->wait); 129244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 130244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang return IRQ_HANDLED; 131244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 132244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 133244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 134244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic int __devinit i2c_pca_pf_probe(struct platform_device *pdev) 135244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 136244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c; 137244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct resource *res; 138244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca9564_pf_platform_data *platform_data = 139244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang pdev->dev.platform_data; 140244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang int ret = 0; 141244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang int irq; 142244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 143244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 144244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang irq = platform_get_irq(pdev, 0); 145244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang /* If irq is 0, we do polling. */ 146244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 147244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (res == NULL) { 148244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang ret = -ENODEV; 149244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang goto e_print; 150244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } 151244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 152c6ffddea36dd576b70dfbd10eb5d2b287b786dcaLinus Walleij if (!request_mem_region(res->start, resource_size(res), res->name)) { 153244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang ret = -ENOMEM; 154244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang goto e_print; 155244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } 156244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 157244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c = kzalloc(sizeof(struct i2c_pca_pf_data), GFP_KERNEL); 158244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (!i2c) { 159244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang ret = -ENOMEM; 160244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang goto e_alloc; 161244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } 162244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 163244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang init_waitqueue_head(&i2c->wait); 164244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 165c6ffddea36dd576b70dfbd10eb5d2b287b786dcaLinus Walleij i2c->reg_base = ioremap(res->start, resource_size(res)); 166244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (!i2c->reg_base) { 1677650da023eb05426812bbf8999b69dc93fee67abWolfram Sang ret = -ENOMEM; 168244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang goto e_remap; 169244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } 170244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->io_base = res->start; 171c6ffddea36dd576b70dfbd10eb5d2b287b786dcaLinus Walleij i2c->io_size = resource_size(res); 172244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->irq = irq; 173244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 174244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->adap.nr = pdev->id >= 0 ? pdev->id : 0; 175244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->adap.owner = THIS_MODULE; 176eff9ec95efaaf6b12d230f0ea7d3c295d3bc9d57Marco Aurelio da Costa snprintf(i2c->adap.name, sizeof(i2c->adap.name), 177eff9ec95efaaf6b12d230f0ea7d3c295d3bc9d57Marco Aurelio da Costa "PCA9564/PCA9665 at 0x%08lx", 178eff9ec95efaaf6b12d230f0ea7d3c295d3bc9d57Marco Aurelio da Costa (unsigned long) res->start); 179244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->adap.algo_data = &i2c->algo_data; 180244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->adap.dev.parent = &pdev->dev; 181244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 1826b110d13aacc9c4ef5f01af12a5e2b7f1d23f106Wolfram Sang if (platform_data) { 1836b110d13aacc9c4ef5f01af12a5e2b7f1d23f106Wolfram Sang i2c->adap.timeout = platform_data->timeout; 1846b110d13aacc9c4ef5f01af12a5e2b7f1d23f106Wolfram Sang i2c->algo_data.i2c_clock = platform_data->i2c_clock_speed; 1856b110d13aacc9c4ef5f01af12a5e2b7f1d23f106Wolfram Sang i2c->gpio = platform_data->gpio; 1866b110d13aacc9c4ef5f01af12a5e2b7f1d23f106Wolfram Sang } else { 1876b110d13aacc9c4ef5f01af12a5e2b7f1d23f106Wolfram Sang i2c->adap.timeout = HZ; 1886b110d13aacc9c4ef5f01af12a5e2b7f1d23f106Wolfram Sang i2c->algo_data.i2c_clock = 59000; 1896b110d13aacc9c4ef5f01af12a5e2b7f1d23f106Wolfram Sang i2c->gpio = -1; 1906b110d13aacc9c4ef5f01af12a5e2b7f1d23f106Wolfram Sang } 1916b110d13aacc9c4ef5f01af12a5e2b7f1d23f106Wolfram Sang 192244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.data = i2c; 1936b110d13aacc9c4ef5f01af12a5e2b7f1d23f106Wolfram Sang i2c->algo_data.wait_for_completion = i2c_pca_pf_waitforcompletion; 1946b110d13aacc9c4ef5f01af12a5e2b7f1d23f106Wolfram Sang i2c->algo_data.reset_chip = i2c_pca_pf_dummyreset; 195244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 196244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang switch (res->flags & IORESOURCE_MEM_TYPE_MASK) { 197244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang case IORESOURCE_MEM_32BIT: 198244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.write_byte = i2c_pca_pf_writebyte32; 199244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.read_byte = i2c_pca_pf_readbyte32; 200244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang break; 201244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang case IORESOURCE_MEM_16BIT: 202244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.write_byte = i2c_pca_pf_writebyte16; 203244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.read_byte = i2c_pca_pf_readbyte16; 204244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang break; 205244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang case IORESOURCE_MEM_8BIT: 206244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang default: 207244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.write_byte = i2c_pca_pf_writebyte8; 208244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.read_byte = i2c_pca_pf_readbyte8; 209244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang break; 210244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } 211244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 212244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang /* Use gpio_is_valid() when in mainline */ 213244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (i2c->gpio > -1) { 214244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang ret = gpio_request(i2c->gpio, i2c->adap.name); 215244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (ret == 0) { 216244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang gpio_direction_output(i2c->gpio, 1); 217244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.reset_chip = i2c_pca_pf_resetchip; 218244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } else { 219244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang printk(KERN_WARNING "%s: Registering gpio failed!\n", 220244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->adap.name); 221244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->gpio = ret; 222244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } 223244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } 224244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 225244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (irq) { 226244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang ret = request_irq(irq, i2c_pca_pf_handler, 227323584436db0cb05286425d4dfd9516fce88487fNobuhiro Iwamatsu IRQF_TRIGGER_FALLING, pdev->name, i2c); 228244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (ret) 229244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang goto e_reqirq; 230244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } 231244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 232244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (i2c_pca_add_numbered_bus(&i2c->adap) < 0) { 233244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang ret = -ENODEV; 234244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang goto e_adapt; 235244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } 236244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 237244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang platform_set_drvdata(pdev, i2c); 238244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 239244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang printk(KERN_INFO "%s registered.\n", i2c->adap.name); 240244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 241244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang return 0; 242244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 243244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sange_adapt: 244244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (irq) 245244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang free_irq(irq, i2c); 246244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sange_reqirq: 247244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (i2c->gpio > -1) 248244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang gpio_free(i2c->gpio); 249244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 250244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang iounmap(i2c->reg_base); 251244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sange_remap: 252244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang kfree(i2c); 253244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sange_alloc: 254c6ffddea36dd576b70dfbd10eb5d2b287b786dcaLinus Walleij release_mem_region(res->start, resource_size(res)); 255244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sange_print: 256eff9ec95efaaf6b12d230f0ea7d3c295d3bc9d57Marco Aurelio da Costa printk(KERN_ERR "Registering PCA9564/PCA9665 FAILED! (%d)\n", ret); 257244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang return ret; 258244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 259244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 260244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic int __devexit i2c_pca_pf_remove(struct platform_device *pdev) 261244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 262244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c = platform_get_drvdata(pdev); 263244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang platform_set_drvdata(pdev, NULL); 264244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 265244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c_del_adapter(&i2c->adap); 266244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 267244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (i2c->irq) 268244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang free_irq(i2c->irq, i2c); 269244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 270244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (i2c->gpio > -1) 271244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang gpio_free(i2c->gpio); 272244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 273244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang iounmap(i2c->reg_base); 274244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang release_mem_region(i2c->io_base, i2c->io_size); 275244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang kfree(i2c); 276244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 277244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang return 0; 278244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 279244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 280244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic struct platform_driver i2c_pca_pf_driver = { 281244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang .probe = i2c_pca_pf_probe, 282244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang .remove = __devexit_p(i2c_pca_pf_remove), 283244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang .driver = { 284244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang .name = "i2c-pca-platform", 285244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang .owner = THIS_MODULE, 286244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang }, 287244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang}; 288244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 289a3664b51c783aaa0dde1c95334d1a670d6d54590Axel Linmodule_platform_driver(i2c_pca_pf_driver); 290244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 291244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram SangMODULE_AUTHOR("Wolfram Sang <w.sang@pengutronix.de>"); 292eff9ec95efaaf6b12d230f0ea7d3c295d3bc9d57Marco Aurelio da CostaMODULE_DESCRIPTION("I2C-PCA9564/PCA9665 platform driver"); 293244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram SangMODULE_LICENSE("GPL"); 294