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authorSudip Mukherjee <sudipm.mukherjee@gmail.com>2015-05-20 20:56:57 +0530
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-06-01 07:08:18 +0900
commit6fa45a22689722dac9f0e90c0931d4b34b334ede (patch)
treed3f766b8771a0004cb21690b55e75f0ce1aba014 /include/linux/parport.h
parent208250dd4c3dd54963db85340cdc5e4c2acef5b5 (diff)
parport: add device-model to parport subsystem
parport subsystem starts using the device-model. Drivers using the device-model has to define devmodel as true and should register the device with parport using parport_register_dev_model(). Tested-by: Jean Delvare <jdelvare@suse.de> Tested-by: Alan Cox <gnomes@lxorguk.ukuu.org.uk> Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/parport.h')
-rw-r--r--include/linux/parport.h43
1 files changed, 41 insertions, 2 deletions
diff --git a/include/linux/parport.h b/include/linux/parport.h
index c22f12547324..58e3c64c6b49 100644
--- a/include/linux/parport.h
+++ b/include/linux/parport.h
@@ -13,6 +13,7 @@
#include <linux/wait.h>
#include <linux/irqreturn.h>
#include <linux/semaphore.h>
+#include <linux/device.h>
#include <asm/ptrace.h>
#include <uapi/linux/parport.h>
@@ -145,6 +146,8 @@ struct pardevice {
unsigned int flags;
struct pardevice *next;
struct pardevice *prev;
+ struct device dev;
+ bool devmodel;
struct parport_state *state; /* saved status over preemption */
wait_queue_head_t wait_q;
unsigned long int time;
@@ -156,6 +159,8 @@ struct pardevice {
void * sysctl_table;
};
+#define to_pardevice(n) container_of(n, struct pardevice, dev)
+
/* IEEE1284 information */
/* IEEE1284 phases. These are exposed to userland through ppdev IOCTL
@@ -195,7 +200,7 @@ struct parport {
* This may unfortulately be null if the
* port has a legacy driver.
*/
-
+ struct device bus_dev; /* to link with the bus */
struct parport *physport;
/* If this is a non-default mux
parport, i.e. we're a clone of a real
@@ -245,15 +250,26 @@ struct parport {
struct parport *slaves[3];
};
+#define to_parport_dev(n) container_of(n, struct parport, bus_dev)
+
#define DEFAULT_SPIN_TIME 500 /* us */
struct parport_driver {
const char *name;
void (*attach) (struct parport *);
void (*detach) (struct parport *);
+ void (*match_port)(struct parport *);
+ int (*probe)(struct pardevice *);
+ struct device_driver driver;
+ bool devmodel;
struct list_head list;
};
+#define to_parport_driver(n) container_of(n, struct parport_driver, driver)
+
+int parport_bus_init(void);
+void parport_bus_exit(void);
+
/* parport_register_port registers a new parallel port at the given
address (if one does not already exist) and returns a pointer to it.
This entails claiming the I/O region, IRQ and DMA. NULL is returned
@@ -272,10 +288,20 @@ void parport_announce_port (struct parport *port);
extern void parport_remove_port(struct parport *port);
/* Register a new high-level driver. */
-extern int parport_register_driver (struct parport_driver *);
+
+int __must_check __parport_register_driver(struct parport_driver *,
+ struct module *,
+ const char *mod_name);
+/*
+ * parport_register_driver must be a macro so that KBUILD_MODNAME can
+ * be expanded
+ */
+#define parport_register_driver(driver) \
+ __parport_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
/* Unregister a high-level driver. */
extern void parport_unregister_driver (struct parport_driver *);
+void parport_unregister_driver(struct parport_driver *);
/* If parport_register_driver doesn't fit your needs, perhaps
* parport_find_xxx does. */
@@ -288,6 +314,15 @@ extern irqreturn_t parport_irq_handler(int irq, void *dev_id);
/* Reference counting for ports. */
extern struct parport *parport_get_port (struct parport *);
extern void parport_put_port (struct parport *);
+void parport_del_port(struct parport *);
+
+struct pardev_cb {
+ int (*preempt)(void *);
+ void (*wakeup)(void *);
+ void *private;
+ void (*irq_func)(void *);
+ unsigned int flags;
+};
/* parport_register_device declares that a device is connected to a
port, and tells the kernel all it needs to know.
@@ -301,6 +336,10 @@ struct pardevice *parport_register_device(struct parport *port,
void (*irq_func)(void *),
int flags, void *handle);
+struct pardevice *
+parport_register_dev_model(struct parport *port, const char *name,
+ const struct pardev_cb *par_dev_cb, int cnt);
+
/* parport_unregister unlinks a device from the chain. */
extern void parport_unregister_device(struct pardevice *dev);