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-rw-r--r--include/linux/hsi/hsi.h31
1 files changed, 17 insertions, 14 deletions
diff --git a/include/linux/hsi/hsi.h b/include/linux/hsi/hsi.h
index 4b17806..56fae86 100644
--- a/include/linux/hsi/hsi.h
+++ b/include/linux/hsi/hsi.h
@@ -26,9 +26,9 @@
#include <linux/device.h>
#include <linux/mutex.h>
#include <linux/scatterlist.h>
-#include <linux/spinlock.h>
#include <linux/list.h>
#include <linux/module.h>
+#include <linux/notifier.h>
/* HSI message ttype */
#define HSI_MSG_READ 0
@@ -121,18 +121,18 @@ static inline int hsi_register_board_info(struct hsi_board_info const *info,
* @device: Driver model representation of the device
* @tx_cfg: HSI TX configuration
* @rx_cfg: HSI RX configuration
- * @hsi_start_rx: Called after incoming wake line goes high
- * @hsi_stop_rx: Called after incoming wake line goes low
+ * @e_handler: Callback for handling port events (RX Wake High/Low)
+ * @pclaimed: Keeps tracks if the clients claimed its associated HSI port
+ * @nb: Notifier block for port events
*/
struct hsi_client {
struct device device;
struct hsi_config tx_cfg;
struct hsi_config rx_cfg;
- void (*hsi_start_rx)(struct hsi_client *cl);
- void (*hsi_stop_rx)(struct hsi_client *cl);
/* private: */
+ void (*ehandler)(struct hsi_client *, unsigned long);
unsigned int pclaimed:1;
- struct list_head link;
+ struct notifier_block nb;
};
#define to_hsi_client(dev) container_of(dev, struct hsi_client, device)
@@ -147,6 +147,10 @@ static inline void *hsi_client_drvdata(struct hsi_client *cl)
return dev_get_drvdata(&cl->device);
}
+int hsi_register_port_event(struct hsi_client *cl,
+ void (*handler)(struct hsi_client *, unsigned long));
+int hsi_unregister_port_event(struct hsi_client *cl);
+
/**
* struct hsi_client_driver - Driver associated to an HSI client
* @driver: Driver model representation of the driver
@@ -214,8 +218,7 @@ void hsi_free_msg(struct hsi_msg *msg);
* @start_tx: Callback to inform that a client wants to TX data
* @stop_tx: Callback to inform that a client no longer wishes to TX data
* @release: Callback to inform that a client no longer uses the port
- * @clients: List of hsi_clients using the port.
- * @clock: Lock to serialize access to the clients list.
+ * @n_head: Notifier chain for signaling port events to the clients.
*/
struct hsi_port {
struct device device;
@@ -231,14 +234,14 @@ struct hsi_port {
int (*start_tx)(struct hsi_client *cl);
int (*stop_tx)(struct hsi_client *cl);
int (*release)(struct hsi_client *cl);
- struct list_head clients;
- spinlock_t clock;
+ /* private */
+ struct atomic_notifier_head n_head;
};
#define to_hsi_port(dev) container_of(dev, struct hsi_port, device)
#define hsi_get_port(cl) to_hsi_port((cl)->device.parent)
-void hsi_event(struct hsi_port *port, unsigned int event);
+int hsi_event(struct hsi_port *port, unsigned long event);
int hsi_claim_port(struct hsi_client *cl, unsigned int share);
void hsi_release_port(struct hsi_client *cl);
@@ -270,13 +273,13 @@ struct hsi_controller {
struct module *owner;
unsigned int id;
unsigned int num_ports;
- struct hsi_port *port;
+ struct hsi_port **port;
};
#define to_hsi_controller(dev) container_of(dev, struct hsi_controller, device)
struct hsi_controller *hsi_alloc_controller(unsigned int n_ports, gfp_t flags);
-void hsi_free_controller(struct hsi_controller *hsi);
+void hsi_put_controller(struct hsi_controller *hsi);
int hsi_register_controller(struct hsi_controller *hsi);
void hsi_unregister_controller(struct hsi_controller *hsi);
@@ -294,7 +297,7 @@ static inline void *hsi_controller_drvdata(struct hsi_controller *hsi)
static inline struct hsi_port *hsi_find_port_num(struct hsi_controller *hsi,
unsigned int num)
{
- return (num < hsi->num_ports) ? &hsi->port[num] : NULL;
+ return (num < hsi->num_ports) ? hsi->port[num] : NULL;
}
/*
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