/*
- * 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
#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;
} __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 */
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 */
};
-typedef irqreturn_t(*dma_interrupt_t) (int irq, void *dev_id);
-
+struct mutex;
struct dma_channel {
struct mutex dmalock;
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 */
unsigned int irq;
- dma_interrupt_t irq_callback;
void *data;
- unsigned int dma_enable_flag;
- unsigned int loopback_flag;
#ifdef CONFIG_PM
unsigned short saved_peripheral_map;
#endif
/*******************************************************************************
* 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, const 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 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_DMA_CHANNELS];
+void blackfin_dma_early_init(void);
#endif
git.samba.org / sfrench / cifs-2.6.git / blobdiff