i2c-pca-platform.c revision 244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801
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> 18244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang#include <linux/errno.h> 19244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang#include <linux/i2c.h> 20244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang#include <linux/interrupt.h> 21244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang#include <linux/platform_device.h> 22244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang#include <linux/i2c-algo-pca.h> 23244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang#include <linux/i2c-pca-platform.h> 24244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang#include <linux/gpio.h> 25244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 26244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang#include <asm/irq.h> 27244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang#include <asm/io.h> 28244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 29244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang#define res_len(r) ((r)->end - (r)->start + 1) 30244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 31244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstruct i2c_pca_pf_data { 32244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang void __iomem *reg_base; 33244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang int irq; /* if 0, use polling */ 34244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang int gpio; 35244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang wait_queue_head_t wait; 36244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_adapter adap; 37244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_algo_pca_data algo_data; 38244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang unsigned long io_base; 39244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang unsigned long io_size; 40244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang}; 41244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 42244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang/* Read/Write functions for different register alignments */ 43244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 44244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic int i2c_pca_pf_readbyte8(void *pd, int reg) 45244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 46244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c = pd; 47244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang return ioread8(i2c->reg_base + reg); 48244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 49244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 50244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic int i2c_pca_pf_readbyte16(void *pd, int reg) 51244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 52244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c = pd; 53244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang return ioread8(i2c->reg_base + reg * 2); 54244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 55244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 56244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic int i2c_pca_pf_readbyte32(void *pd, int reg) 57244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 58244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c = pd; 59244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang return ioread8(i2c->reg_base + reg * 4); 60244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 61244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 62244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic void i2c_pca_pf_writebyte8(void *pd, int reg, int val) 63244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 64244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c = pd; 65244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang iowrite8(val, i2c->reg_base + reg); 66244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 67244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 68244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic void i2c_pca_pf_writebyte16(void *pd, int reg, int val) 69244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 70244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c = pd; 71244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang iowrite8(val, i2c->reg_base + reg * 2); 72244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 73244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 74244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic void i2c_pca_pf_writebyte32(void *pd, int reg, int val) 75244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 76244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c = pd; 77244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang iowrite8(val, i2c->reg_base + reg * 4); 78244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 79244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 80244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 81244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic int i2c_pca_pf_waitforcompletion(void *pd) 82244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 83244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c = pd; 84244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang int ret = 0; 85244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 86244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (i2c->irq) { 87244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang ret = wait_event_interruptible(i2c->wait, 88244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.read_byte(i2c, I2C_PCA_CON) 89244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang & I2C_PCA_CON_SI); 90244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } else { 91244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang /* 92244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang * Do polling... 93244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang * XXX: Could get stuck in extreme cases! 94244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang * Maybe add timeout, but using irqs is preferred anyhow. 95244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang */ 96244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang while ((i2c->algo_data.read_byte(i2c, I2C_PCA_CON) 97244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang & I2C_PCA_CON_SI) == 0) 98244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang udelay(100); 99244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } 100244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 101244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang return ret; 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) { 166244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang ret = -EIO; 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; 175244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang snprintf(i2c->adap.name, sizeof(i2c->adap.name), "PCA9564 at 0x%08lx", 176244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang (unsigned long) res->start); 177244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->adap.algo_data = &i2c->algo_data; 178244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->adap.dev.parent = &pdev->dev; 179244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->adap.timeout = platform_data->timeout; 180244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 181244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.i2c_clock = platform_data->i2c_clock_speed; 182244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.data = i2c; 183244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 184244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang switch (res->flags & IORESOURCE_MEM_TYPE_MASK) { 185244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang case IORESOURCE_MEM_32BIT: 186244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.write_byte = i2c_pca_pf_writebyte32; 187244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.read_byte = i2c_pca_pf_readbyte32; 188244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang break; 189244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang case IORESOURCE_MEM_16BIT: 190244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.write_byte = i2c_pca_pf_writebyte16; 191244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.read_byte = i2c_pca_pf_readbyte16; 192244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang break; 193244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang case IORESOURCE_MEM_8BIT: 194244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang default: 195244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.write_byte = i2c_pca_pf_writebyte8; 196244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.read_byte = i2c_pca_pf_readbyte8; 197244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang break; 198244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } 199244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 200244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.wait_for_completion = i2c_pca_pf_waitforcompletion; 201244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 202244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->gpio = platform_data->gpio; 203244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.reset_chip = i2c_pca_pf_dummyreset; 204244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 205244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang /* Use gpio_is_valid() when in mainline */ 206244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (i2c->gpio > -1) { 207244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang ret = gpio_request(i2c->gpio, i2c->adap.name); 208244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (ret == 0) { 209244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang gpio_direction_output(i2c->gpio, 1); 210244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->algo_data.reset_chip = i2c_pca_pf_resetchip; 211244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } else { 212244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang printk(KERN_WARNING "%s: Registering gpio failed!\n", 213244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->adap.name); 214244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c->gpio = ret; 215244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } 216244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } 217244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 218244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (irq) { 219244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang ret = request_irq(irq, i2c_pca_pf_handler, 220244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang IRQF_TRIGGER_FALLING, i2c->adap.name, i2c); 221244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (ret) 222244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang goto e_reqirq; 223244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } 224244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 225244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (i2c_pca_add_numbered_bus(&i2c->adap) < 0) { 226244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang ret = -ENODEV; 227244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang goto e_adapt; 228244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang } 229244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 230244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang platform_set_drvdata(pdev, i2c); 231244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 232244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang printk(KERN_INFO "%s registered.\n", i2c->adap.name); 233244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 234244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang return 0; 235244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 236244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sange_adapt: 237244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (irq) 238244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang free_irq(irq, i2c); 239244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sange_reqirq: 240244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (i2c->gpio > -1) 241244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang gpio_free(i2c->gpio); 242244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 243244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang iounmap(i2c->reg_base); 244244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sange_remap: 245244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang kfree(i2c); 246244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sange_alloc: 247244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang release_mem_region(res->start, res_len(res)); 248244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sange_print: 249244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang printk(KERN_ERR "Registering PCA9564 FAILED! (%d)\n", ret); 250244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang return ret; 251244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 252244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 253244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic int __devexit i2c_pca_pf_remove(struct platform_device *pdev) 254244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 255244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang struct i2c_pca_pf_data *i2c = platform_get_drvdata(pdev); 256244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang platform_set_drvdata(pdev, NULL); 257244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 258244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang i2c_del_adapter(&i2c->adap); 259244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 260244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (i2c->irq) 261244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang free_irq(i2c->irq, i2c); 262244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 263244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang if (i2c->gpio > -1) 264244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang gpio_free(i2c->gpio); 265244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 266244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang iounmap(i2c->reg_base); 267244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang release_mem_region(i2c->io_base, i2c->io_size); 268244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang kfree(i2c); 269244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 270244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang return 0; 271244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 272244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 273244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic struct platform_driver i2c_pca_pf_driver = { 274244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang .probe = i2c_pca_pf_probe, 275244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang .remove = __devexit_p(i2c_pca_pf_remove), 276244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang .driver = { 277244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang .name = "i2c-pca-platform", 278244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang .owner = THIS_MODULE, 279244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang }, 280244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang}; 281244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 282244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic int __init i2c_pca_pf_init(void) 283244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 284244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang return platform_driver_register(&i2c_pca_pf_driver); 285244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 286244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 287244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangstatic void __exit i2c_pca_pf_exit(void) 288244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang{ 289244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang platform_driver_unregister(&i2c_pca_pf_driver); 290244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang} 291244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 292244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram SangMODULE_AUTHOR("Wolfram Sang <w.sang@pengutronix.de>"); 293244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram SangMODULE_DESCRIPTION("I2C-PCA9564 platform driver"); 294244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram SangMODULE_LICENSE("GPL"); 295244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 296244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangmodule_init(i2c_pca_pf_init); 297244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sangmodule_exit(i2c_pca_pf_exit); 298244fbbb81c46eefcc5f3a9cc37c4668f9d8ff801Wolfram Sang 299