5 files changed, 102 insertions, 3 deletions

diff --git a/include/linux/spi/mmc_spi.h b/include/linux/spi/mmc_spi.h
index 0f4eb165f254..32be8dbdf191 100644
--- a/include/linux/spi/mmc_spi.h
+++ b/include/linux/spi/mmc_spi.h
@@ -1,10 +1,10 @@
 #ifndef __LINUX_SPI_MMC_SPI_H
 #define __LINUX_SPI_MMC_SPI_H
 
-#include <linux/device.h>
 #include <linux/spi/spi.h>
 #include <linux/interrupt.h>
 
+struct device;
 struct mmc_host;
 
 /* Put this in platform_data of a device being used to manage an MMC/SD
diff --git a/include/linux/spi/orion_spi.h b/include/linux/spi/orion_spi.h
index decf6d8c77b7..b4d9fa6f797c 100644
--- a/include/linux/spi/orion_spi.h
+++ b/include/linux/spi/orion_spi.h
@@ -11,7 +11,6 @@
 
 struct orion_spi_info {
         u32     tclk;           /* no <linux/clk.h> support yet */
-        u32     enable_clock_fix;
 };
 
 
diff --git a/include/linux/spi/s3c24xx.h b/include/linux/spi/s3c24xx.h
new file mode 100644
index 000000000000..c23b923e493b
--- /dev/null
+++ b/include/linux/spi/s3c24xx.h
@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2006 Simtec Electronics
+ *      Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C2410 - SPI Controller platform_device info
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#ifndef __LINUX_SPI_S3C24XX_H
+#define __LINUX_SPI_S3C24XX_H __FILE__
+
+struct s3c2410_spi_info {
+        int                      pin_cs;        /* simple gpio cs */
+        unsigned int             num_cs;        /* total chipselects */
+        int                      bus_num;       /* bus number to use. */
+
+        unsigned int             use_fiq:1;     /* use fiq */
+
+        void (*gpio_setup)(struct s3c2410_spi_info *spi, int enable);
+        void (*set_cs)(struct s3c2410_spi_info *spi, int cs, int pol);
+};
+
+#endif /* __LINUX_SPI_S3C24XX_H */
diff --git a/include/linux/spi/sh_hspi.h b/include/linux/spi/sh_hspi.h
new file mode 100644
index 000000000000..a1121f872ac1
--- /dev/null
+++ b/include/linux/spi/sh_hspi.h
@@ -0,0 +1,23 @@
+/*
+ * Copyright (C) 2011 Kuninori Morimoto
+ *
+ * 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; version 2 of the License.
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+#ifndef SH_HSPI_H
+#define SH_HSPI_H
+
+struct sh_hspi_info {
+};
+
+#endif
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index 176fce9cc6b1..98679b061b63 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -22,6 +22,7 @@
 #include <linux/device.h>
 #include <linux/mod_devicetable.h>
 #include <linux/slab.h>
+#include <linux/kthread.h>
 
 /*
  * INTERFACES between SPI master-side drivers and SPI infrastructure.
@@ -235,6 +236,27 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv)
  *      the device whose settings are being modified.
  * @transfer: adds a message to the controller's transfer queue.
  * @cleanup: frees controller-specific state
+ * @queued: whether this master is providing an internal message queue
+ * @kworker: thread struct for message pump
+ * @kworker_task: pointer to task for message pump kworker thread
+ * @pump_messages: work struct for scheduling work to the message pump
+ * @queue_lock: spinlock to syncronise access to message queue
+ * @queue: message queue
+ * @cur_msg: the currently in-flight message
+ * @busy: message pump is busy
+ * @running: message pump is running
+ * @rt: whether this queue is set to run as a realtime task
+ * @prepare_transfer_hardware: a message will soon arrive from the queue
+ *      so the subsystem requests the driver to prepare the transfer hardware
+ *      by issuing this call
+ * @transfer_one_message: the subsystem calls the driver to transfer a single
+ *      message while queuing transfers that arrive in the meantime. When the
+ *      driver is finished with this message, it must call
+ *      spi_finalize_current_message() so the subsystem can issue the next
+ *      transfer
+ * @prepare_transfer_hardware: there are currently no more messages on the
+ *      queue so the subsystem notifies the driver that it may relax the
+ *      hardware by issuing this call
  *
  * Each SPI master controller can communicate with one or more @spi_device
  * children.  These make a small bus, sharing MOSI, MISO and SCK signals
@@ -318,6 +340,28 @@ struct spi_master {
 
         /* called on release() to free memory provided by spi_master */
         void                    (*cleanup)(struct spi_device *spi);
+
+        /*
+         * These hooks are for drivers that want to use the generic
+         * master transfer queueing mechanism. If these are used, the
+         * transfer() function above must NOT be specified by the driver.
+         * Over time we expect SPI drivers to be phased over to this API.
+         */
+        bool                            queued;
+        struct kthread_worker           kworker;
+        struct task_struct              *kworker_task;
+        struct kthread_work             pump_messages;
+        spinlock_t                      queue_lock;
+        struct list_head                queue;
+        struct spi_message              *cur_msg;
+        bool                            busy;
+        bool                            running;
+        bool                            rt;
+
+        int (*prepare_transfer_hardware)(struct spi_master *master);
+        int (*transfer_one_message)(struct spi_master *master,
+                                    struct spi_message *mesg);
+        int (*unprepare_transfer_hardware)(struct spi_master *master);
 };
 
 static inline void *spi_master_get_devdata(struct spi_master *master)
@@ -343,6 +387,13 @@ static inline void spi_master_put(struct spi_master *master)
                 put_device(&master->dev);
 }
 
+/* PM calls that need to be issued by the driver */
+extern int spi_master_suspend(struct spi_master *master);
+extern int spi_master_resume(struct spi_master *master);
+
+/* Calls the driver make to interact with the message queue */
+extern struct spi_message *spi_get_next_queued_message(struct spi_master *master);
+extern void spi_finalize_current_message(struct spi_master *master);
 
 /* the spi driver core manages memory for the spi_master classdev */
 extern struct spi_master *
@@ -549,7 +600,7 @@ static inline struct spi_message *spi_message_alloc(unsigned ntrans, gfp_t flags
                         + ntrans * sizeof(struct spi_transfer),
                         flags);
         if (m) {
-                int i;
+                unsigned i;
                 struct spi_transfer *t = (struct spi_transfer *)(m + 1);
 
                 INIT_LIST_HEAD(&m->transfers);