diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/i2c/busses/i2c-pca-isa.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/i2c/busses/i2c-pca-isa.c | 229 |
1 files changed, 0 insertions, 229 deletions
diff --git a/ANDROID_3.4.5/drivers/i2c/busses/i2c-pca-isa.c b/ANDROID_3.4.5/drivers/i2c/busses/i2c-pca-isa.c deleted file mode 100644 index 29933f87..00000000 --- a/ANDROID_3.4.5/drivers/i2c/busses/i2c-pca-isa.c +++ /dev/null @@ -1,229 +0,0 @@ -/* - * i2c-pca-isa.c driver for PCA9564 on ISA boards - * Copyright (C) 2004 Arcom Control Systems - * Copyright (C) 2008 Pengutronix - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include <linux/kernel.h> -#include <linux/ioport.h> -#include <linux/module.h> -#include <linux/moduleparam.h> -#include <linux/delay.h> -#include <linux/jiffies.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/wait.h> -#include <linux/isa.h> -#include <linux/i2c.h> -#include <linux/i2c-algo-pca.h> -#include <linux/io.h> - -#include <asm/irq.h> - -#define DRIVER "i2c-pca-isa" -#define IO_SIZE 4 - -static unsigned long base; -static int irq = -1; - -/* Data sheet recommends 59kHz for 100kHz operation due to variation - * in the actual clock rate */ -static int clock = 59000; - -static struct i2c_adapter pca_isa_ops; -static wait_queue_head_t pca_wait; - -static void pca_isa_writebyte(void *pd, int reg, int val) -{ -#ifdef DEBUG_IO - static char *names[] = { "T/O", "DAT", "ADR", "CON" }; - printk(KERN_DEBUG "*** write %s at %#lx <= %#04x\n", names[reg], - base+reg, val); -#endif - outb(val, base+reg); -} - -static int pca_isa_readbyte(void *pd, int reg) -{ - int res = inb(base+reg); -#ifdef DEBUG_IO - { - static char *names[] = { "STA", "DAT", "ADR", "CON" }; - printk(KERN_DEBUG "*** read %s => %#04x\n", names[reg], res); - } -#endif - return res; -} - -static int pca_isa_waitforcompletion(void *pd) -{ - unsigned long timeout; - long ret; - - if (irq > -1) { - ret = wait_event_timeout(pca_wait, - pca_isa_readbyte(pd, I2C_PCA_CON) - & I2C_PCA_CON_SI, pca_isa_ops.timeout); - } else { - /* Do polling */ - timeout = jiffies + pca_isa_ops.timeout; - do { - ret = time_before(jiffies, timeout); - if (pca_isa_readbyte(pd, I2C_PCA_CON) - & I2C_PCA_CON_SI) - break; - udelay(100); - } while (ret); - } - - return ret > 0; -} - -static void pca_isa_resetchip(void *pd) -{ - /* apparently only an external reset will do it. not a lot can be done */ - printk(KERN_WARNING DRIVER ": Haven't figured out how to do a reset yet\n"); -} - -static irqreturn_t pca_handler(int this_irq, void *dev_id) { - wake_up(&pca_wait); - return IRQ_HANDLED; -} - -static struct i2c_algo_pca_data pca_isa_data = { - /* .data intentionally left NULL, not needed with ISA */ - .write_byte = pca_isa_writebyte, - .read_byte = pca_isa_readbyte, - .wait_for_completion = pca_isa_waitforcompletion, - .reset_chip = pca_isa_resetchip, -}; - -static struct i2c_adapter pca_isa_ops = { - .owner = THIS_MODULE, - .algo_data = &pca_isa_data, - .name = "PCA9564/PCA9665 ISA Adapter", - .timeout = HZ, -}; - -static int __devinit pca_isa_match(struct device *dev, unsigned int id) -{ - int match = base != 0; - - if (match) { - if (irq <= -1) - dev_warn(dev, "Using polling mode (specify irq)\n"); - } else - dev_err(dev, "Please specify I/O base\n"); - - return match; -} - -static int __devinit pca_isa_probe(struct device *dev, unsigned int id) -{ - init_waitqueue_head(&pca_wait); - - dev_info(dev, "i/o base %#08lx. irq %d\n", base, irq); - -#ifdef CONFIG_PPC - if (check_legacy_ioport(base)) { - dev_err(dev, "I/O address %#08lx is not available\n", base); - goto out; - } -#endif - - if (!request_region(base, IO_SIZE, "i2c-pca-isa")) { - dev_err(dev, "I/O address %#08lx is in use\n", base); - goto out; - } - - if (irq > -1) { - if (request_irq(irq, pca_handler, 0, "i2c-pca-isa", &pca_isa_ops) < 0) { - dev_err(dev, "Request irq%d failed\n", irq); - goto out_region; - } - } - - pca_isa_data.i2c_clock = clock; - if (i2c_pca_add_bus(&pca_isa_ops) < 0) { - dev_err(dev, "Failed to add i2c bus\n"); - goto out_irq; - } - - return 0; - - out_irq: - if (irq > -1) - free_irq(irq, &pca_isa_ops); - out_region: - release_region(base, IO_SIZE); - out: - return -ENODEV; -} - -static int __devexit pca_isa_remove(struct device *dev, unsigned int id) -{ - i2c_del_adapter(&pca_isa_ops); - - if (irq > -1) { - disable_irq(irq); - free_irq(irq, &pca_isa_ops); - } - release_region(base, IO_SIZE); - - return 0; -} - -static struct isa_driver pca_isa_driver = { - .match = pca_isa_match, - .probe = pca_isa_probe, - .remove = __devexit_p(pca_isa_remove), - .driver = { - .owner = THIS_MODULE, - .name = DRIVER, - } -}; - -static int __init pca_isa_init(void) -{ - return isa_register_driver(&pca_isa_driver, 1); -} - -static void __exit pca_isa_exit(void) -{ - isa_unregister_driver(&pca_isa_driver); -} - -MODULE_AUTHOR("Ian Campbell <icampbell@arcom.com>"); -MODULE_DESCRIPTION("ISA base PCA9564/PCA9665 driver"); -MODULE_LICENSE("GPL"); - -module_param(base, ulong, 0); -MODULE_PARM_DESC(base, "I/O base address"); - -module_param(irq, int, 0); -MODULE_PARM_DESC(irq, "IRQ"); -module_param(clock, int, 0); -MODULE_PARM_DESC(clock, "Clock rate in hertz.\n\t\t" - "For PCA9564: 330000,288000,217000,146000," - "88000,59000,44000,36000\n" - "\t\tFor PCA9665:\tStandard: 60300 - 100099\n" - "\t\t\t\tFast: 100100 - 400099\n" - "\t\t\t\tFast+: 400100 - 10000099\n" - "\t\t\t\tTurbo: Up to 1265800"); - -module_init(pca_isa_init); -module_exit(pca_isa_exit); |