Merge commit 'v2.6.29-rc1' into tracing/urgent

1 files changed, 136 insertions, 84 deletions

diff --git a/arch/blackfin/include/asm/dma.h b/arch/blackfin/include/asm/dma.h
index 6509733bb0f6..e4f7b8043f02 100644
--- a/arch/blackfin/include/asm/dma.h
+++ b/arch/blackfin/include/asm/dma.h
@@ -1,44 +1,17 @@
 /*
- * File:         include/asm-blackfin/simple_bf533_dma.h
- * Based on:     none - original work
- * Author:       LG Soft India
- *               Copyright (C) 2004-2005 Analog Devices Inc.
- * Created:      Tue Sep 21 2004
- * Description:  This file contains the major Data structures and constants
- * 		 used for DMA Implementation in BF533
- * Modified:
+ * dma.h - Blackfin DMA defines/structures/etc...
  *
- * Bugs:         Enter bugs at http://blackfin.uclinux.org/
- *
- * 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; either version 2, or (at your option)
- * any later version.
- *
- * 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; see the file COPYING.
- * If not, write to the Free Software Foundation,
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ * Copyright 2004-2008 Analog Devices Inc.
+ * Licensed under the GPL-2 or later.
  */
 
 #ifndef _BLACKFIN_DMA_H_
 #define _BLACKFIN_DMA_H_
 
-#include <asm/io.h>
-#include <linux/slab.h>
-#include <asm/irq.h>
-#include <asm/signal.h>
-
-#include <linux/kernel.h>
-#include <mach/dma.h>
-#include <linux/mm.h>
 #include <linux/interrupt.h>
+#include <mach/dma.h>
 #include <asm/blackfin.h>
+#include <asm/page.h>
 
 #define MAX_DMA_ADDRESS PAGE_OFFSET
 
@@ -79,7 +52,7 @@ enum dma_chan_status {
 #define DMA_SYNC_RESTART	1
 
 struct dmasg {
-	unsigned long next_desc_addr;
+	void *next_desc_addr;
 	unsigned long start_addr;
 	unsigned short cfg;
 	unsigned short x_count;
@@ -89,7 +62,7 @@ struct dmasg {
 } __attribute__((packed));
 
 struct dma_register {
-	unsigned long next_desc_ptr;	/* DMA Next Descriptor Pointer register */
+	void *next_desc_ptr;	/* DMA Next Descriptor Pointer register */
 	unsigned long start_addr;	/* DMA Start address  register */
 
 	unsigned short cfg;	/* DMA Configuration register */
@@ -109,7 +82,7 @@ struct dma_register {
 	short y_modify;	/* DMA y_modify register */
 	unsigned short dummy5;
 
-	unsigned long curr_desc_ptr;	/* DMA Current Descriptor Pointer
+	void *curr_desc_ptr;	/* DMA Current Descriptor Pointer
 					   register */
 	unsigned long curr_addr_ptr;	/* DMA Current Address Pointer
 						   register */
@@ -131,19 +104,15 @@ struct dma_register {
 
 };
 
-typedef irqreturn_t(*dma_interrupt_t) (int irq, void *dev_id);
-
+struct mutex;
 struct dma_channel {
 	struct mutex dmalock;
-	char *device_id;
+	const char *device_id;
 	enum dma_chan_status chan_status;
-	struct dma_register *regs;
+	volatile struct dma_register *regs;
 	struct dmasg *sg;		/* large mode descriptor */
-	unsigned int ctrl_num;	/* controller number */
-	dma_interrupt_t irq_callback;
+	unsigned int irq;
 	void *data;
-	unsigned int dma_enable_flag;
-	unsigned int loopback_flag;
 #ifdef CONFIG_PM
 	unsigned short saved_peripheral_map;
 #endif
@@ -157,49 +126,132 @@ void blackfin_dma_resume(void);
 /*******************************************************************************
 *	DMA API's
 *******************************************************************************/
-/* functions to set register mode */
-void set_dma_start_addr(unsigned int channel, unsigned long addr);
-void set_dma_next_desc_addr(unsigned int channel, unsigned long addr);
-void set_dma_curr_desc_addr(unsigned int channel, unsigned long addr);
-void set_dma_x_count(unsigned int channel, unsigned short x_count);
-void set_dma_x_modify(unsigned int channel, short x_modify);
-void set_dma_y_count(unsigned int channel, unsigned short y_count);
-void set_dma_y_modify(unsigned int channel, short y_modify);
-void set_dma_config(unsigned int channel, unsigned short config);
-unsigned short set_bfin_dma_config(char direction, char flow_mode,
-				   char intr_mode, char dma_mode, char width,
-				   char syncmode);
-void set_dma_curr_addr(unsigned int channel, unsigned long addr);
-
-/* get curr status for polling */
-unsigned short get_dma_curr_irqstat(unsigned int channel);
-unsigned short get_dma_curr_xcount(unsigned int channel);
-unsigned short get_dma_curr_ycount(unsigned int channel);
-unsigned long get_dma_next_desc_ptr(unsigned int channel);
-unsigned long get_dma_curr_desc_ptr(unsigned int channel);
-unsigned long get_dma_curr_addr(unsigned int channel);
-
-/* set large DMA mode descriptor */
-void set_dma_sg(unsigned int channel, struct dmasg *sg, int nr_sg);
-
-/* check if current channel is in use */
-int dma_channel_active(unsigned int channel);
-
-/* common functions must be called in any mode */
+extern struct dma_channel dma_ch[MAX_DMA_CHANNELS];
+extern struct dma_register *dma_io_base_addr[MAX_DMA_CHANNELS];
+extern int channel2irq(unsigned int channel);
+
+static inline void set_dma_start_addr(unsigned int channel, unsigned long addr)
+{
+	dma_ch[channel].regs->start_addr = addr;
+}
+static inline void set_dma_next_desc_addr(unsigned int channel, void *addr)
+{
+	dma_ch[channel].regs->next_desc_ptr = addr;
+}
+static inline void set_dma_curr_desc_addr(unsigned int channel, void *addr)
+{
+	dma_ch[channel].regs->curr_desc_ptr = addr;
+}
+static inline void set_dma_x_count(unsigned int channel, unsigned short x_count)
+{
+	dma_ch[channel].regs->x_count = x_count;
+}
+static inline void set_dma_y_count(unsigned int channel, unsigned short y_count)
+{
+	dma_ch[channel].regs->y_count = y_count;
+}
+static inline void set_dma_x_modify(unsigned int channel, short x_modify)
+{
+	dma_ch[channel].regs->x_modify = x_modify;
+}
+static inline void set_dma_y_modify(unsigned int channel, short y_modify)
+{
+	dma_ch[channel].regs->y_modify = y_modify;
+}
+static inline void set_dma_config(unsigned int channel, unsigned short config)
+{
+	dma_ch[channel].regs->cfg = config;
+}
+static inline void set_dma_curr_addr(unsigned int channel, unsigned long addr)
+{
+	dma_ch[channel].regs->curr_addr_ptr = addr;
+}
+
+static inline unsigned short
+set_bfin_dma_config(char direction, char flow_mode,
+		    char intr_mode, char dma_mode, char width, char syncmode)
+{
+	return (direction << 1) | (width << 2) | (dma_mode << 4) |
+		(intr_mode << 6) | (flow_mode << 12) | (syncmode << 5);
+}
+
+static inline unsigned short get_dma_curr_irqstat(unsigned int channel)
+{
+	return dma_ch[channel].regs->irq_status;
+}
+static inline unsigned short get_dma_curr_xcount(unsigned int channel)
+{
+	return dma_ch[channel].regs->curr_x_count;
+}
+static inline unsigned short get_dma_curr_ycount(unsigned int channel)
+{
+	return dma_ch[channel].regs->curr_y_count;
+}
+static inline void *get_dma_next_desc_ptr(unsigned int channel)
+{
+	return dma_ch[channel].regs->next_desc_ptr;
+}
+static inline void *get_dma_curr_desc_ptr(unsigned int channel)
+{
+	return dma_ch[channel].regs->curr_desc_ptr;
+}
+static inline unsigned short get_dma_config(unsigned int channel)
+{
+	return dma_ch[channel].regs->cfg;
+}
+static inline unsigned long get_dma_curr_addr(unsigned int channel)
+{
+	return dma_ch[channel].regs->curr_addr_ptr;
+}
+
+static inline void set_dma_sg(unsigned int channel, struct dmasg *sg, int ndsize)
+{
+	dma_ch[channel].regs->cfg =
+		(dma_ch[channel].regs->cfg & ~(0xf << 8)) |
+		((ndsize & 0xf) << 8);
+	dma_ch[channel].regs->next_desc_ptr = sg;
+}
+
+static inline int dma_channel_active(unsigned int channel)
+{
+	if (dma_ch[channel].chan_status == DMA_CHANNEL_FREE)
+		return 0;
+	else
+		return 1;
+}
+
+static inline void disable_dma(unsigned int channel)
+{
+	dma_ch[channel].regs->cfg &= ~DMAEN;
+	SSYNC();
+	dma_ch[channel].chan_status = DMA_CHANNEL_REQUESTED;
+}
+static inline void enable_dma(unsigned int channel)
+{
+	dma_ch[channel].regs->curr_x_count = 0;
+	dma_ch[channel].regs->curr_y_count = 0;
+	dma_ch[channel].regs->cfg |= DMAEN;
+	dma_ch[channel].chan_status = DMA_CHANNEL_ENABLED;
+}
 void free_dma(unsigned int channel);
-int dma_channel_active(unsigned int channel); /* check if a channel is in use */
-void disable_dma(unsigned int channel);
-void enable_dma(unsigned int channel);
-int request_dma(unsigned int channel, char *device_id);
-int set_dma_callback(unsigned int channel, dma_interrupt_t callback,
-		     void *data);
-void dma_disable_irq(unsigned int channel);
-void dma_enable_irq(unsigned int channel);
-void clear_dma_irqstat(unsigned int channel);
+int request_dma(unsigned int channel, const char *device_id);
+int set_dma_callback(unsigned int channel, irq_handler_t callback, void *data);
+
+static inline void dma_disable_irq(unsigned int channel)
+{
+	disable_irq(dma_ch[channel].irq);
+}
+static inline void dma_enable_irq(unsigned int channel)
+{
+	enable_irq(dma_ch[channel].irq);
+}
+static inline void clear_dma_irqstat(unsigned int channel)
+{
+	dma_ch[channel].regs->irq_status = DMA_DONE | DMA_ERR;
+}
+
 void *dma_memcpy(void *dest, const void *src, size_t count);
 void *safe_dma_memcpy(void *dest, const void *src, size_t count);
-
-extern int channel2irq(unsigned int channel);
-extern struct dma_register *dma_io_base_addr[MAX_BLACKFIN_DMA_CHANNEL];
+void blackfin_dma_early_init(void);
 
 #endif