include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit...

[safe/jmp/linux-2.6] / drivers / i2c / busses / i2c-parport.c

diff --git a/drivers/i2c/busses/i2c-parport.c b/drivers/i2c/busses/i2c-parport.c
index 0d89986..846583e 100644 (file)
--- a/drivers/i2c/busses/i2c-parport.c
+++ b/drivers/i2c/busses/i2c-parport.c
@@ -1,7 +1,7 @@
 /* ------------------------------------------------------------------------ *
  * i2c-parport.c I2C bus over parallel port                                 *
  * ------------------------------------------------------------------------ *
-   Copyright (C) 2003-2007 Jean Delvare <khali@linux-fr.org>
+   Copyright (C) 2003-2010 Jean Delvare <khali@linux-fr.org>
    
    Based on older i2c-philips-par.c driver
    Copyright (C) 1995-2000 Simon G. Vogl
@@ -27,9 +27,12 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/init.h>
+#include <linux/delay.h>
 #include <linux/parport.h>
 #include <linux/i2c.h>
 #include <linux/i2c-algo-bit.h>
+#include <linux/i2c-smbus.h>
+#include <linux/slab.h>
 #include "i2c-parport.h"
 
 /* ----- Device list ------------------------------------------------------ */
@@ -38,6 +41,8 @@ struct i2c_par {
        struct pardevice *pdev;
        struct i2c_adapter adapter;
        struct i2c_algo_bit_data algo_data;
+       struct i2c_smbus_alert_setup alert_data;
+       struct i2c_client *ara;
        struct i2c_par *next;
 };
 
@@ -143,6 +148,19 @@ static struct i2c_algo_bit_data parport_algo_data = {
 
 /* ----- I2c and parallel port call-back functions and structures --------- */
 
+void i2c_parport_irq(void *data)
+{
+       struct i2c_par *adapter = data;
+       struct i2c_client *ara = adapter->ara;
+
+       if (ara) {
+               dev_dbg(&ara->dev, "SMBus alert received\n");
+               i2c_handle_smbus_alert(ara);
+       } else
+               dev_dbg(&adapter->adapter.dev,
+                       "SMBus alert received but no ARA client!\n");
+}
+
 static void i2c_parport_attach (struct parport *port)
 {
        struct i2c_par *adapter;
@@ -154,8 +172,9 @@ static void i2c_parport_attach (struct parport *port)
        }
 
        pr_debug("i2c-parport: attaching to %s\n", port->name);
+       parport_disable_irq(port);
        adapter->pdev = parport_register_device(port, "i2c-parport",
-               NULL, NULL, NULL, PARPORT_FLAG_EXCL, NULL);
+               NULL, NULL, i2c_parport_irq, PARPORT_FLAG_EXCL, adapter);
        if (!adapter->pdev) {
                printk(KERN_ERR "i2c-parport: Unable to register with parport\n");
                goto ERROR0;
@@ -185,14 +204,29 @@ static void i2c_parport_attach (struct parport *port)
        parport_setsda(port, 1);
        parport_setscl(port, 1);
        /* Other init if needed (power on...) */
-       if (adapter_parm[type].init.val)
+       if (adapter_parm[type].init.val) {
                line_set(port, 1, &adapter_parm[type].init);
+               /* Give powered devices some time to settle */
+               msleep(100);
+       }
 
        if (i2c_bit_add_bus(&adapter->adapter) < 0) {
                printk(KERN_ERR "i2c-parport: Unable to register with I2C\n");
                goto ERROR1;
        }
 
+       /* Setup SMBus alert if supported */
+       if (adapter_parm[type].smbus_alert) {
+               adapter->alert_data.alert_edge_triggered = 1;
+               adapter->ara = i2c_setup_smbus_alert(&adapter->adapter,
+                                                    &adapter->alert_data);
+               if (adapter->ara)
+                       parport_enable_irq(port);
+               else
+                       printk(KERN_WARNING "i2c-parport: Failed to register "
+                              "ARA client\n");
+       }
+
        /* Add the new adapter to the list */
        adapter->next = adapter_list;
        adapter_list = adapter;
@@ -213,6 +247,10 @@ static void i2c_parport_detach (struct parport *port)
        for (prev = NULL, adapter = adapter_list; adapter;
             prev = adapter, adapter = adapter->next) {
                if (adapter->pdev->port == port) {
+                       if (adapter->ara) {
+                               parport_disable_irq(port);
+                               i2c_unregister_device(adapter->ara);
+                       }
                        i2c_del_adapter(&adapter->adapter);
 
                        /* Un-init if needed (power off...) */