diff --git a/drivers/i2c/busses/i2c-parport-light.c b/drivers/i2c/busses/i2c-parport-light.c index 4bc42810b9aa..49a95e2887bc 100644 --- a/drivers/i2c/busses/i2c-parport-light.c +++ b/drivers/i2c/busses/i2c-parport-light.c @@ -1,7 +1,7 @@ /* ------------------------------------------------------------------------ * - * i2c-parport.c I2C bus over parallel port * + * i2c-parport-light.c I2C bus over parallel port * * ------------------------------------------------------------------------ * - Copyright (C) 2003-2004 Jean Delvare + Copyright (C) 2003-2007 Jean Delvare Based on older i2c-velleman.c driver Copyright (C) 1995-2000 Simon G. Vogl @@ -27,6 +27,7 @@ #include #include #include +#include #include #include #include @@ -34,6 +35,9 @@ #include "i2c-parport.h" #define DEFAULT_BASE 0x378 +#define DRVNAME "i2c-parport-light" + +static struct platform_device *pdev; static u16 base; module_param(base, ushort, 0); @@ -106,7 +110,7 @@ static struct i2c_algo_bit_data parport_algo_data = { .timeout = HZ, }; -/* ----- I2c structure ---------------------------------------------------- */ +/* ----- Driver registration ---------------------------------------------- */ static struct i2c_adapter parport_adapter = { .owner = THIS_MODULE, @@ -116,30 +120,14 @@ static struct i2c_adapter parport_adapter = { .name = "Parallel port adapter (light)", }; -/* ----- Module loading, unloading and information ------------------------ */ - -static int __init i2c_parport_init(void) +static int __devinit i2c_parport_probe(struct platform_device *pdev) { - if (type < 0) { - printk(KERN_WARNING "i2c-parport: adapter type unspecified\n"); - return -ENODEV; - } + int err; + struct resource *res; - if (type >= ARRAY_SIZE(adapter_parm)) { - printk(KERN_WARNING "i2c-parport: invalid type (%d)\n", type); - return -ENODEV; - } - - if (base == 0) { - printk(KERN_INFO "i2c-parport: using default base 0x%x\n", DEFAULT_BASE); - base = DEFAULT_BASE; - } - - if (!request_region(base, 3, "i2c-parport")) - return -ENODEV; - - if (!adapter_parm[type].getscl.val) - parport_algo_data.getscl = NULL; + res = platform_get_resource(pdev, IORESOURCE_IO, 0); + if (!request_region(res->start, res->end - res->start + 1, DRVNAME)) + return -EBUSY; /* Reset hardware to a sane state (SCL and SDA high) */ parport_setsda(NULL, 1); @@ -148,23 +136,125 @@ static int __init i2c_parport_init(void) if (adapter_parm[type].init.val) line_set(1, &adapter_parm[type].init); - if (i2c_bit_add_bus(&parport_adapter) < 0) { - printk(KERN_ERR "i2c-parport: Unable to register with I2C\n"); - release_region(base, 3); - return -ENODEV; + parport_adapter.dev.parent = &pdev->dev; + err = i2c_bit_add_bus(&parport_adapter); + if (err) { + dev_err(&pdev->dev, "Unable to register with I2C\n"); + goto exit_region; } - return 0; + +exit_region: + release_region(res->start, res->end - res->start + 1); + return err; } -static void __exit i2c_parport_exit(void) +static int __devexit i2c_parport_remove(struct platform_device *pdev) { + struct resource *res; + + i2c_del_adapter(&parport_adapter); + /* Un-init if needed (power off...) */ if (adapter_parm[type].init.val) line_set(0, &adapter_parm[type].init); - i2c_del_adapter(&parport_adapter); - release_region(base, 3); + res = platform_get_resource(pdev, IORESOURCE_IO, 0); + release_region(res->start, res->end - res->start + 1); + return 0; +} + +static struct platform_driver i2c_parport_driver = { + .driver = { + .owner = THIS_MODULE, + .name = DRVNAME, + }, + .probe = i2c_parport_probe, + .remove = __devexit_p(i2c_parport_remove), +}; + +static int __init i2c_parport_device_add(u16 address) +{ + struct resource res = { + .start = address, + .end = address + 2, + .name = DRVNAME, + .flags = IORESOURCE_IO, + }; + int err; + + pdev = platform_device_alloc(DRVNAME, -1); + if (!pdev) { + err = -ENOMEM; + printk(KERN_ERR DRVNAME ": Device allocation failed\n"); + goto exit; + } + + err = platform_device_add_resources(pdev, &res, 1); + if (err) { + printk(KERN_ERR DRVNAME ": Device resource addition failed " + "(%d)\n", err); + goto exit_device_put; + } + + err = platform_device_add(pdev); + if (err) { + printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n", + err); + goto exit_device_put; + } + + return 0; + +exit_device_put: + platform_device_put(pdev); +exit: + return err; +} + +static int __init i2c_parport_init(void) +{ + int err; + + if (type < 0) { + printk(KERN_ERR DRVNAME ": adapter type unspecified\n"); + return -ENODEV; + } + + if (type >= ARRAY_SIZE(adapter_parm)) { + printk(KERN_ERR DRVNAME ": invalid type (%d)\n", type); + return -ENODEV; + } + + if (base == 0) { + pr_info(DRVNAME ": using default base 0x%x\n", DEFAULT_BASE); + base = DEFAULT_BASE; + } + + if (!adapter_parm[type].getscl.val) + parport_algo_data.getscl = NULL; + + /* Sets global pdev as a side effect */ + err = i2c_parport_device_add(base); + if (err) + goto exit; + + err = platform_driver_register(&i2c_parport_driver); + if (err) + goto exit_device; + + return 0; + +exit_device: + platform_device_unregister(pdev); +exit: + return err; +} + +static void __exit i2c_parport_exit(void) +{ + platform_driver_unregister(&i2c_parport_driver); + platform_device_unregister(pdev); } MODULE_AUTHOR("Jean Delvare ");