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authorMike Frysinger <vapier.adi@gmail.com>2009-01-07 23:14:39 +0800
committerBryan Wu <cooloney@kernel.org>2009-01-07 23:14:39 +0800
commit9c417a43299edc52931712a54c46cff4db19082c (patch)
tree5981a0f424543660335d600b70c82d99f9185fc8 /arch/blackfin
parent4c1ed6a57bc51ecd471989ae744da86a9101912f (diff)
Blackfin arch: move most dma functions into static inlines
move most dma functions into static inlines since they are vastly 1 liners that get/set a value in a structure Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'arch/blackfin')
-rw-r--r--arch/blackfin/include/asm/dma.h156
-rw-r--r--arch/blackfin/kernel/bfin_dma_5xx.c233
2 files changed, 137 insertions, 252 deletions
diff --git a/arch/blackfin/include/asm/dma.h b/arch/blackfin/include/asm/dma.h
index 4928e7aa480..690c25f5f99 100644
--- a/arch/blackfin/include/asm/dma.h
+++ b/arch/blackfin/include/asm/dma.h
@@ -129,50 +129,126 @@ 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, unsigned long addr)
+{
+ dma_ch[channel].regs->next_desc_ptr = addr;
+}
+static inline void set_dma_curr_desc_addr(unsigned int channel, unsigned long 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 unsigned long get_dma_next_desc_ptr(unsigned int channel)
+{
+ return dma_ch[channel].regs->next_desc_ptr;
+}
+static inline unsigned long get_dma_curr_desc_ptr(unsigned int channel)
+{
+ return dma_ch[channel].regs->curr_desc_ptr;
+}
+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 |= ((ndsize & 0x0F) << 8);
+ dma_ch[channel].regs->next_desc_ptr = (unsigned long)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, irq_handler_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);
void blackfin_dma_early_init(void);
-extern int channel2irq(unsigned int channel);
-extern struct dma_register *dma_io_base_addr[MAX_DMA_CHANNELS];
-
#endif
diff --git a/arch/blackfin/kernel/bfin_dma_5xx.c b/arch/blackfin/kernel/bfin_dma_5xx.c
index ed7d2859a62..917b5b8e32c 100644
--- a/arch/blackfin/kernel/bfin_dma_5xx.c
+++ b/arch/blackfin/kernel/bfin_dma_5xx.c
@@ -1,7 +1,7 @@
/*
* bfin_dma_5xx.c - Blackfin DMA implementation
*
- * Copyright 2004-2006 Analog Devices Inc.
+ * Copyright 2004-2008 Analog Devices Inc.
* Licensed under the GPL-2 or later.
*/
@@ -20,22 +20,8 @@
#include <asm/dma.h>
#include <asm/uaccess.h>
-/**************************************************************************
- * Global Variables
-***************************************************************************/
-
-static struct dma_channel dma_ch[MAX_DMA_CHANNELS];
-
-/*------------------------------------------------------------------------------
- * Set the Buffer Clear bit in the Configuration register of specific DMA
- * channel. This will stop the descriptor based DMA operation.
- *-----------------------------------------------------------------------------*/
-static void clear_dma_buffer(unsigned int channel)
-{
- dma_ch[channel].regs->cfg |= RESTART;
- SSYNC();
- dma_ch[channel].regs->cfg &= ~RESTART;
-}
+struct dma_channel dma_ch[MAX_DMA_CHANNELS];
+EXPORT_SYMBOL(dma_ch);
static int __init blackfin_dma_init(void)
{
@@ -92,9 +78,11 @@ static int __init proc_dma_init(void)
late_initcall(proc_dma_init);
#endif
-/*------------------------------------------------------------------------------
- * Request the specific DMA channel from the system.
- *-----------------------------------------------------------------------------*/
+/**
+ * request_dma - request a DMA channel
+ *
+ * Request the specific DMA channel from the system if it's available.
+ */
int request_dma(unsigned int channel, const char *device_id)
{
pr_debug("request_dma() : BEGIN \n");
@@ -172,6 +160,19 @@ int set_dma_callback(unsigned int channel, irq_handler_t callback, void *data)
}
EXPORT_SYMBOL(set_dma_callback);
+/**
+ * clear_dma_buffer - clear DMA fifos for specified channel
+ *
+ * Set the Buffer Clear bit in the Configuration register of specific DMA
+ * channel. This will stop the descriptor based DMA operation.
+ */
+static void clear_dma_buffer(unsigned int channel)
+{
+ dma_ch[channel].regs->cfg |= RESTART;
+ SSYNC();
+ dma_ch[channel].regs->cfg &= ~RESTART;
+}
+
void free_dma(unsigned int channel)
{
pr_debug("freedma() : BEGIN \n");
@@ -194,198 +195,6 @@ void free_dma(unsigned int channel)
}
EXPORT_SYMBOL(free_dma);
-void dma_enable_irq(unsigned int channel)
-{
- pr_debug("dma_enable_irq() : BEGIN \n");
- enable_irq(dma_ch[channel].irq);
-}
-EXPORT_SYMBOL(dma_enable_irq);
-
-void dma_disable_irq(unsigned int channel)
-{
- pr_debug("dma_disable_irq() : BEGIN \n");
- disable_irq(dma_ch[channel].irq);
-}
-EXPORT_SYMBOL(dma_disable_irq);
-
-int dma_channel_active(unsigned int channel)
-{
- if (dma_ch[channel].chan_status == DMA_CHANNEL_FREE) {
- return 0;
- } else {
- return 1;
- }
-}
-EXPORT_SYMBOL(dma_channel_active);
-
-/*------------------------------------------------------------------------------
-* stop the specific DMA channel.
-*-----------------------------------------------------------------------------*/
-void disable_dma(unsigned int channel)
-{
- pr_debug("stop_dma() : BEGIN \n");
- dma_ch[channel].regs->cfg &= ~DMAEN; /* Clean the enable bit */
- SSYNC();
- dma_ch[channel].chan_status = DMA_CHANNEL_REQUESTED;
- /* Needs to be enabled Later */
- pr_debug("stop_dma() : END \n");
- return;
-}
-EXPORT_SYMBOL(disable_dma);
-
-void enable_dma(unsigned int channel)
-{
- pr_debug("enable_dma() : BEGIN \n");
- dma_ch[channel].chan_status = DMA_CHANNEL_ENABLED;
- dma_ch[channel].regs->curr_x_count = 0;
- dma_ch[channel].regs->curr_y_count = 0;
-
- dma_ch[channel].regs->cfg |= DMAEN; /* Set the enable bit */
- pr_debug("enable_dma() : END \n");
- return;
-}
-EXPORT_SYMBOL(enable_dma);
-
-/*------------------------------------------------------------------------------
-* Set the Start Address register for the specific DMA channel
-* This function can be used for register based DMA,
-* to setup the start address
-* addr: Starting address of the DMA Data to be transferred.
-*-----------------------------------------------------------------------------*/
-void set_dma_start_addr(unsigned int channel, unsigned long addr)
-{
- pr_debug("set_dma_start_addr() : BEGIN \n");
- dma_ch[channel].regs->start_addr = addr;
- pr_debug("set_dma_start_addr() : END\n");
-}
-EXPORT_SYMBOL(set_dma_start_addr);
-
-void set_dma_next_desc_addr(unsigned int channel, unsigned long addr)
-{
- pr_debug("set_dma_next_desc_addr() : BEGIN \n");
- dma_ch[channel].regs->next_desc_ptr = addr;
- pr_debug("set_dma_next_desc_addr() : END\n");
-}
-EXPORT_SYMBOL(set_dma_next_desc_addr);
-
-void set_dma_curr_desc_addr(unsigned int channel, unsigned long addr)
-{
- pr_debug("set_dma_curr_desc_addr() : BEGIN \n");
- dma_ch[channel].regs->curr_desc_ptr = addr;
- pr_debug("set_dma_curr_desc_addr() : END\n");
-}
-EXPORT_SYMBOL(set_dma_curr_desc_addr);
-
-void set_dma_x_count(unsigned int channel, unsigned short x_count)
-{
- dma_ch[channel].regs->x_count = x_count;
-}
-EXPORT_SYMBOL(set_dma_x_count);
-
-void set_dma_y_count(unsigned int channel, unsigned short y_count)
-{
- dma_ch[channel].regs->y_count = y_count;
-}
-EXPORT_SYMBOL(set_dma_y_count);
-
-void set_dma_x_modify(unsigned int channel, short x_modify)
-{
- dma_ch[channel].regs->x_modify = x_modify;
-}
-EXPORT_SYMBOL(set_dma_x_modify);
-
-void set_dma_y_modify(unsigned int channel, short y_modify)
-{
- dma_ch[channel].regs->y_modify = y_modify;
-}
-EXPORT_SYMBOL(set_dma_y_modify);
-
-void set_dma_config(unsigned int channel, unsigned short config)
-{
- dma_ch[channel].regs->cfg = config;
-}
-EXPORT_SYMBOL(set_dma_config);
-
-unsigned short
-set_bfin_dma_config(char direction, char flow_mode,
- char intr_mode, char dma_mode, char width, char syncmode)
-{
- unsigned short config;
-
- config =
- ((direction << 1) | (width << 2) | (dma_mode << 4) |
- (intr_mode << 6) | (flow_mode << 12) | (syncmode << 5));
- return config;
-}
-EXPORT_SYMBOL(set_bfin_dma_config);
-
-void set_dma_sg(unsigned int channel, struct dmasg *sg, int nr_sg)
-{
- dma_ch[channel].regs->cfg |= ((nr_sg & 0x0F) << 8);
- dma_ch[channel].regs->next_desc_ptr = (unsigned int)sg;
-}
-EXPORT_SYMBOL(set_dma_sg);
-
-void set_dma_curr_addr(unsigned int channel, unsigned long addr)
-{
- dma_ch[channel].regs->curr_addr_ptr = addr;
-}
-EXPORT_SYMBOL(set_dma_curr_addr);
-
-/*------------------------------------------------------------------------------
- * Get the DMA status of a specific DMA channel from the system.
- *-----------------------------------------------------------------------------*/
-unsigned short get_dma_curr_irqstat(unsigned int channel)
-{
- return dma_ch[channel].regs->irq_status;
-}
-EXPORT_SYMBOL(get_dma_curr_irqstat);
-
-/*------------------------------------------------------------------------------
- * Clear the DMA_DONE bit in DMA status. Stop the DMA completion interrupt.
- *-----------------------------------------------------------------------------*/
-void clear_dma_irqstat(unsigned int channel)
-{
- dma_ch[channel].regs->irq_status |= 3;
-}
-EXPORT_SYMBOL(clear_dma_irqstat);
-
-/*------------------------------------------------------------------------------
- * Get current DMA xcount of a specific DMA channel from the system.
- *-----------------------------------------------------------------------------*/
-unsigned short get_dma_curr_xcount(unsigned int channel)
-{
- return dma_ch[channel].regs->curr_x_count;
-}
-EXPORT_SYMBOL(get_dma_curr_xcount);
-
-/*------------------------------------------------------------------------------
- * Get current DMA ycount of a specific DMA channel from the system.
- *-----------------------------------------------------------------------------*/
-unsigned short get_dma_curr_ycount(unsigned int channel)
-{
- return dma_ch[channel].regs->curr_y_count;
-}
-EXPORT_SYMBOL(get_dma_curr_ycount);
-
-unsigned long get_dma_next_desc_ptr(unsigned int channel)
-{
- return dma_ch[channel].regs->next_desc_ptr;
-}
-EXPORT_SYMBOL(get_dma_next_desc_ptr);
-
-unsigned long get_dma_curr_desc_ptr(unsigned int channel)
-{
- return dma_ch[channel].regs->curr_desc_ptr;
-}
-EXPORT_SYMBOL(get_dma_curr_desc_ptr);
-
-unsigned long get_dma_curr_addr(unsigned int channel)
-{
- return dma_ch[channel].regs->curr_addr_ptr;
-}
-EXPORT_SYMBOL(get_dma_curr_addr);
-
#ifdef CONFIG_PM
# ifndef MAX_DMA_SUSPEND_CHANNELS
# define MAX_DMA_SUSPEND_CHANNELS MAX_DMA_CHANNELS