/*
* linux/arch/arm/plat-omap/dma.c
*
- * Copyright (C) 2003 Nokia Corporation
+ * Copyright (C) 2003 - 2008 Nokia Corporation
* Author: Juha Yrjölä <juha.yrjola@nokia.com>
* DMA channel linking for 1610 by Samuel Ortiz <samuel.ortiz@nokia.com>
* Graphics DMA and LCD DMA graphics tranformations
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
+#include <linux/io.h>
#include <asm/system.h>
#include <asm/hardware.h>
#include <asm/dma.h>
-#include <asm/io.h>
#include <asm/arch/tc.h>
enum { DMA_CHAIN_STARTED, DMA_CHAIN_NOTSTARTED };
#endif
-#define OMAP_DMA_ACTIVE 0x01
-#define OMAP_DMA_CCR_EN (1 << 7)
+#define OMAP_DMA_ACTIVE 0x01
+#define OMAP_DMA_CCR_EN (1 << 7)
#define OMAP2_DMA_CSR_CLEAR_MASK 0xffe
-#define OMAP_FUNC_MUX_ARM_BASE (0xfffe1000 + 0xec)
+#define OMAP_FUNC_MUX_ARM_BASE (0xfffe1000 + 0xec)
-static int enable_1510_mode = 0;
+static int enable_1510_mode;
struct omap_dma_lch {
int next_lch;
u16 saved_csr;
u16 enabled_irqs;
const char *dev_name;
- void (* callback)(int lch, u16 ch_status, void *data);
+ void (*callback)(int lch, u16 ch_status, void *data);
void *data;
#ifndef CONFIG_ARCH_OMAP1
dma_write(ccr, CCR(lch));
}
}
+EXPORT_SYMBOL(omap_set_dma_priority);
void omap_set_dma_transfer_params(int lch, int data_type, int elem_count,
int frame_count, int sync_mode,
dma_write(elem_count, CEN(lch));
dma_write(frame_count, CFN(lch));
}
+EXPORT_SYMBOL(omap_set_dma_transfer_params);
void omap_set_dma_color_mode(int lch, enum omap_dma_color_mode mode, u32 color)
{
}
dma_write(w, LCH_CTRL(lch));
}
+EXPORT_SYMBOL(omap_set_dma_color_mode);
void omap_set_dma_write_mode(int lch, enum omap_dma_write_mode mode)
{
dma_write(csdp, CSDP(lch));
}
}
+EXPORT_SYMBOL(omap_set_dma_write_mode);
/* Note that src_port is only for omap1 */
void omap_set_dma_src_params(int lch, int src_port, int src_amode,
unsigned long src_start,
int src_ei, int src_fi)
{
+ u32 l;
+
if (cpu_class_is_omap1()) {
u16 w;
w &= ~(0x1f << 2);
w |= src_port << 2;
dma_write(w, CSDP(lch));
+ }
- w = dma_read(CCR(lch));
- w &= ~(0x03 << 12);
- w |= src_amode << 12;
- dma_write(w, CCR(lch));
+ l = dma_read(CCR(lch));
+ l &= ~(0x03 << 12);
+ l |= src_amode << 12;
+ dma_write(l, CCR(lch));
+ if (cpu_class_is_omap1()) {
dma_write(src_start >> 16, CSSA_U(lch));
dma_write((u16)src_start, CSSA_L(lch));
-
- dma_write(src_ei, CSEI(lch));
- dma_write(src_fi, CSFI(lch));
}
- if (cpu_class_is_omap2()) {
- u32 l;
-
- l = dma_read(CCR(lch));
- l &= ~(0x03 << 12);
- l |= src_amode << 12;
- dma_write(l, CCR(lch));
-
+ if (cpu_class_is_omap2())
dma_write(src_start, CSSA(lch));
- dma_write(src_ei, CSEI(lch));
- dma_write(src_fi, CSFI(lch));
- }
+
+ dma_write(src_ei, CSEI(lch));
+ dma_write(src_fi, CSFI(lch));
}
+EXPORT_SYMBOL(omap_set_dma_src_params);
-void omap_set_dma_params(int lch, struct omap_dma_channel_params * params)
+void omap_set_dma_params(int lch, struct omap_dma_channel_params *params)
{
omap_set_dma_transfer_params(lch, params->data_type,
params->elem_count, params->frame_count,
omap_dma_set_prio_lch(lch, params->read_prio,
params->write_prio);
}
+EXPORT_SYMBOL(omap_set_dma_params);
void omap_set_dma_src_index(int lch, int eidx, int fidx)
{
- if (cpu_class_is_omap2()) {
- REVISIT_24XX();
+ if (cpu_class_is_omap2())
return;
- }
+
dma_write(eidx, CSEI(lch));
dma_write(fidx, CSFI(lch));
}
+EXPORT_SYMBOL(omap_set_dma_src_index);
void omap_set_dma_src_data_pack(int lch, int enable)
{
l |= (1 << 6);
dma_write(l, CSDP(lch));
}
+EXPORT_SYMBOL(omap_set_dma_src_data_pack);
void omap_set_dma_src_burst_mode(int lch, enum omap_dma_burst_mode burst_mode)
{
l |= (burst << 7);
dma_write(l, CSDP(lch));
}
+EXPORT_SYMBOL(omap_set_dma_src_burst_mode);
/* Note that dest_port is only for OMAP1 */
void omap_set_dma_dest_params(int lch, int dest_port, int dest_amode,
dma_write(dst_ei, CDEI(lch));
dma_write(dst_fi, CDFI(lch));
}
+EXPORT_SYMBOL(omap_set_dma_dest_params);
void omap_set_dma_dest_index(int lch, int eidx, int fidx)
{
- if (cpu_class_is_omap2()) {
- REVISIT_24XX();
+ if (cpu_class_is_omap2())
return;
- }
+
dma_write(eidx, CDEI(lch));
dma_write(fidx, CDFI(lch));
}
+EXPORT_SYMBOL(omap_set_dma_dest_index);
void omap_set_dma_dest_data_pack(int lch, int enable)
{
l |= 1 << 13;
dma_write(l, CSDP(lch));
}
+EXPORT_SYMBOL(omap_set_dma_dest_data_pack);
void omap_set_dma_dest_burst_mode(int lch, enum omap_dma_burst_mode burst_mode)
{
l |= (burst << 14);
dma_write(l, CSDP(lch));
}
+EXPORT_SYMBOL(omap_set_dma_dest_burst_mode);
static inline void omap_enable_channel_irq(int lch)
{
{
dma_chan[lch].enabled_irqs |= bits;
}
+EXPORT_SYMBOL(omap_enable_dma_irq);
void omap_disable_dma_irq(int lch, u16 bits)
{
dma_chan[lch].enabled_irqs &= ~bits;
}
+EXPORT_SYMBOL(omap_disable_dma_irq);
static inline void enable_lnk(int lch)
{
l = dma_chan[lch].next_lch | (1 << 15);
#ifndef CONFIG_ARCH_OMAP1
- if (dma_chan[lch].next_linked_ch != -1)
- l = dma_chan[lch].next_linked_ch | (1 << 15);
+ if (cpu_class_is_omap2())
+ if (dma_chan[lch].next_linked_ch != -1)
+ l = dma_chan[lch].next_linked_ch | (1 << 15);
#endif
dma_write(l, CLNK_CTRL(lch));
}
int omap_request_dma(int dev_id, const char *dev_name,
- void (* callback)(int lch, u16 ch_status, void *data),
+ void (*callback)(int lch, u16 ch_status, void *data),
void *data, int *dma_ch_out)
{
int ch, free_ch = -1;
chan->dev_name = dev_name;
chan->callback = callback;
chan->data = data;
+
#ifndef CONFIG_ARCH_OMAP1
- chan->chain_id = -1;
- chan->next_linked_ch = -1;
+ if (cpu_class_is_omap2()) {
+ chan->chain_id = -1;
+ chan->next_linked_ch = -1;
+ }
#endif
+
chan->enabled_irqs = OMAP_DMA_DROP_IRQ | OMAP_DMA_BLOCK_IRQ;
if (cpu_class_is_omap1())
set_gdma_dev(free_ch + 1, dev_id);
dev_id = free_ch + 1;
}
- /* Disable the 1510 compatibility mode and set the sync device
- * id. */
+ /*
+ * Disable the 1510 compatibility mode and set the sync device
+ * id.
+ */
dma_write(dev_id | (1 << 10), CCR(free_ch));
} else if (cpu_is_omap730() || cpu_is_omap15xx()) {
dma_write(dev_id, CCR(free_ch));
if (cpu_class_is_omap2()) {
omap2_enable_irq_lch(free_ch);
-
omap_enable_channel_irq(free_ch);
/* Clear the CSR register and IRQ status register */
dma_write(OMAP2_DMA_CSR_CLEAR_MASK, CSR(free_ch));
return 0;
}
+EXPORT_SYMBOL(omap_request_dma);
void omap_free_dma(int lch)
{
spin_lock_irqsave(&dma_chan_lock, flags);
if (dma_chan[lch].dev_id == -1) {
- printk("omap_dma: trying to free nonallocated DMA channel %d\n",
+ pr_err("omap_dma: trying to free unallocated DMA channel %d\n",
lch);
spin_unlock_irqrestore(&dma_chan_lock, flags);
return;
}
+
dma_chan[lch].dev_id = -1;
dma_chan[lch].next_lch = -1;
dma_chan[lch].callback = NULL;
omap_clear_dma(lch);
}
}
+EXPORT_SYMBOL(omap_free_dma);
/**
* @brief omap_dma_set_global_params : Set global priority settings for dma
local_irq_restore(flags);
}
+EXPORT_SYMBOL(omap_clear_dma);
void omap_start_dma(int lch)
{
l = dma_read(CCR(lch));
- /* Errata: On ES2.0 BUFFERING disable must be set.
- * This will always fail on ES1.0 */
+ /*
+ * Errata: On ES2.0 BUFFERING disable must be set.
+ * This will always fail on ES1.0
+ */
if (cpu_is_omap24xx())
l |= OMAP_DMA_CCR_EN;
dma_chan[lch].flags |= OMAP_DMA_ACTIVE;
}
+EXPORT_SYMBOL(omap_start_dma);
void omap_stop_dma(int lch)
{
dma_chan[lch].flags &= ~OMAP_DMA_ACTIVE;
}
+EXPORT_SYMBOL(omap_stop_dma);
/*
* Allows changing the DMA callback function or data. This may be needed if
* the driver shares a single DMA channel for multiple dma triggers.
*/
int omap_set_dma_callback(int lch,
- void (* callback)(int lch, u16 ch_status, void *data),
+ void (*callback)(int lch, u16 ch_status, void *data),
void *data)
{
unsigned long flags;
return 0;
}
+EXPORT_SYMBOL(omap_set_dma_callback);
/*
* Returns current physical source address for the given DMA channel.
return offset;
}
+EXPORT_SYMBOL(omap_get_dma_src_pos);
/*
* Returns current physical destination address for the given DMA channel.
return offset;
}
+EXPORT_SYMBOL(omap_get_dma_dst_pos);
/*
* Returns current source transfer counting for the given DMA channel.
{
return (dma_addr_t)dma_read(CSAC(lch));
}
+EXPORT_SYMBOL(omap_get_dma_src_addr_counter);
int omap_get_dma_active_status(int lch)
{
* For this DMA link to start, you still need to start (see omap_start_dma)
* the first one. That will fire up the entire queue.
*/
-void omap_dma_link_lch (int lch_head, int lch_queue)
+void omap_dma_link_lch(int lch_head, int lch_queue)
{
if (omap_dma_in_1510_mode()) {
printk(KERN_ERR "DMA linking is not supported in 1510 mode\n");
dma_chan[lch_head].next_lch = lch_queue;
}
+EXPORT_SYMBOL(omap_dma_link_lch);
/*
* Once the DMA queue is stopped, we can destroy it.
*/
-void omap_dma_unlink_lch (int lch_head, int lch_queue)
+void omap_dma_unlink_lch(int lch_head, int lch_queue)
{
if (omap_dma_in_1510_mode()) {
printk(KERN_ERR "DMA linking is not supported in 1510 mode\n");
dump_stack();
}
-
if ((dma_chan[lch_head].flags & OMAP_DMA_ACTIVE) ||
(dma_chan[lch_head].flags & OMAP_DMA_ACTIVE)) {
printk(KERN_ERR "omap_dma: You need to stop the DMA channels "
dma_chan[lch_head].next_lch = -1;
}
+EXPORT_SYMBOL(omap_dma_unlink_lch);
+
+/*----------------------------------------------------------------------------*/
#ifndef CONFIG_ARCH_OMAP1
/* Create chain of DMA channesls */
for (i = 0; i < (no_of_chans - 1); i++)
create_dma_lch_chain(channels[i], channels[i + 1]);
}
+
return 0;
}
EXPORT_SYMBOL(omap_request_dma_chain);
*/
omap_set_dma_params(channels[i], ¶ms);
}
+
return 0;
}
EXPORT_SYMBOL(omap_modify_dma_chain_params);
dma_linked_lch[chain_id].linked_dmach_q = NULL;
dma_linked_lch[chain_id].chain_mode = -1;
dma_linked_lch[chain_id].chain_state = -1;
+
return (0);
}
EXPORT_SYMBOL(omap_free_dma_chain);
if (OMAP_DMA_CHAIN_QEMPTY(chain_id))
return OMAP_DMA_CHAIN_INACTIVE;
+
return OMAP_DMA_CHAIN_ACTIVE;
}
EXPORT_SYMBOL(omap_dma_chain_status);
u32 l, lch;
int start_dma = 0;
- /* if buffer size is less than 1 then there is
- * no use of starting the chain */
+ /*
+ * if buffer size is less than 1 then there is
+ * no use of starting the chain
+ */
if (elem_count < 1) {
printk(KERN_ERR "Invalid buffer size\n");
return -EINVAL;
dma_write(elem_count, CEN(lch));
dma_write(frame_count, CFN(lch));
- /* If the chain is dynamically linked,
- * then we may have to start the chain if its not active */
+ /*
+ * If the chain is dynamically linked,
+ * then we may have to start the chain if its not active
+ */
if (dma_linked_lch[chain_id].chain_mode == OMAP_DMA_DYNAMIC_CHAIN) {
- /* In Dynamic chain, if the chain is not started,
- * queue the channel */
+ /*
+ * In Dynamic chain, if the chain is not started,
+ * queue the channel
+ */
if (dma_linked_lch[chain_id].chain_state ==
DMA_CHAIN_NOTSTARTED) {
/* Enable the link in previous channel */
dma_chan[lch].state = DMA_CH_QUEUED;
}
- /* Chain is already started, make sure its active,
- * if not then start the chain */
+ /*
+ * Chain is already started, make sure its active,
+ * if not then start the chain
+ */
else {
start_dma = 1;
dma_chan[lch].flags |= OMAP_DMA_ACTIVE;
}
}
+
return 0;
}
EXPORT_SYMBOL(omap_dma_chain_a_transfer);
dma_write(l, CCR(channels[0]));
dma_chan[channels[0]].flags |= OMAP_DMA_ACTIVE;
+
return 0;
}
EXPORT_SYMBOL(omap_start_dma_chain_transfers);
}
channels = dma_linked_lch[chain_id].linked_dmach_q;
- /* DMA Errata:
+ /*
+ * DMA Errata:
* Special programming model needed to disable DMA before end of block
*/
sys_cf = dma_read(OCP_SYSCONFIG);
/* Errata - put in the old value */
dma_write(sys_cf, OCP_SYSCONFIG);
+
return 0;
}
EXPORT_SYMBOL(omap_stop_dma_chain_transfers);
return dma_read(CSAC(lch));
}
EXPORT_SYMBOL(omap_get_dma_chain_src_pos);
-#endif
+#endif /* ifndef CONFIG_ARCH_OMAP1 */
/*----------------------------------------------------------------------------*/
dma_chan[ch].flags &= ~OMAP_DMA_ACTIVE;
if (likely(dma_chan[ch].callback != NULL))
dma_chan[ch].callback(ch, csr, dma_chan[ch].data);
+
return 1;
}
if (!status) {
if (printk_ratelimit())
- printk(KERN_WARNING "Spurious DMA IRQ for lch %d\n", ch);
+ printk(KERN_WARNING "Spurious DMA IRQ for lch %d\n",
+ ch);
dma_write(1 << ch, IRQSTATUS_L0);
return 0;
}
static struct lcd_dma_info {
spinlock_t lock;
int reserved;
- void (* callback)(u16 status, void *data);
+ void (*callback)(u16 status, void *data);
void *cb_data;
int active;
lcd_dma.xres = fb_xres;
lcd_dma.yres = fb_yres;
}
+EXPORT_SYMBOL(omap_set_lcd_dma_b1);
void omap_set_lcd_dma_src_port(int port)
{
{
lcd_dma.ext_ctrl = external;
}
+EXPORT_SYMBOL(omap_set_lcd_dma_ext_controller);
void omap_set_lcd_dma_single_transfer(int single)
{
lcd_dma.single_transfer = single;
}
-
+EXPORT_SYMBOL(omap_set_lcd_dma_single_transfer);
void omap_set_lcd_dma_b1_rotation(int rotate)
{
}
lcd_dma.rotate = rotate;
}
+EXPORT_SYMBOL(omap_set_lcd_dma_b1_rotation);
void omap_set_lcd_dma_b1_mirror(int mirror)
{
}
lcd_dma.mirror = mirror;
}
+EXPORT_SYMBOL(omap_set_lcd_dma_b1_mirror);
void omap_set_lcd_dma_b1_vxres(unsigned long vxres)
{
}
lcd_dma.vxres = vxres;
}
+EXPORT_SYMBOL(omap_set_lcd_dma_b1_vxres);
void omap_set_lcd_dma_b1_scale(unsigned int xscale, unsigned int yscale)
{
lcd_dma.xscale = xscale;
lcd_dma.yscale = yscale;
}
+EXPORT_SYMBOL(omap_set_lcd_dma_b1_scale);
static void set_b1_regs(void)
{
xscale = lcd_dma.xscale ? lcd_dma.xscale : 1;
yscale = lcd_dma.yscale ? lcd_dma.yscale : 1;
BUG_ON(vxres < lcd_dma.xres);
-#define PIXADDR(x,y) (lcd_dma.addr + ((y) * vxres * yscale + (x) * xscale) * es)
+
+#define PIXADDR(x, y) (lcd_dma.addr + \
+ ((y) * vxres * yscale + (x) * xscale) * es)
#define PIXSTEP(sx, sy, dx, dy) (PIXADDR(dx, dy) - PIXADDR(sx, sy) - es + 1)
+
switch (lcd_dma.rotate) {
case 0:
if (!lcd_dma.mirror) {
/* 1510 DMA requires the bottom address to be 2 more
* than the actual last memory access location. */
if (omap_dma_in_1510_mode() &&
- lcd_dma.data_type == OMAP_DMA_DATA_TYPE_S32)
- bottom += 2;
+ lcd_dma.data_type == OMAP_DMA_DATA_TYPE_S32)
+ bottom += 2;
ei = PIXSTEP(0, 0, 1, 0);
fi = PIXSTEP(lcd_dma.xres - 1, 0, 0, 1);
} else {
return IRQ_HANDLED;
}
-int omap_request_lcd_dma(void (* callback)(u16 status, void *data),
+int omap_request_lcd_dma(void (*callback)(u16 status, void *data),
void *data)
{
spin_lock_irq(&lcd_dma.lock);
return 0;
}
+EXPORT_SYMBOL(omap_request_lcd_dma);
void omap_free_lcd_dma(void)
{
lcd_dma.reserved = 0;
spin_unlock(&lcd_dma.lock);
}
+EXPORT_SYMBOL(omap_free_lcd_dma);
void omap_enable_lcd_dma(void)
{
u16 w;
- /* Set the Enable bit only if an external controller is
+ /*
+ * Set the Enable bit only if an external controller is
* connected. Otherwise the OMAP internal controller will
* start the transfer when it gets enabled.
*/
w |= 1 << 7;
omap_writew(w, OMAP1610_DMA_LCD_CCR);
}
+EXPORT_SYMBOL(omap_enable_lcd_dma);
void omap_setup_lcd_dma(void)
{
u16 w;
w = omap_readw(OMAP1610_DMA_LCD_CCR);
- /* If DMA was already active set the end_prog bit to have
+ /*
+ * If DMA was already active set the end_prog bit to have
* the programmed register set loaded into the active
* register set.
*/
w |= 1 << 11; /* End_prog */
if (!lcd_dma.single_transfer)
- w |= (3 << 8); /* Auto_init, repeat */
+ w |= (3 << 8); /* Auto_init, repeat */
omap_writew(w, OMAP1610_DMA_LCD_CCR);
}
}
+EXPORT_SYMBOL(omap_setup_lcd_dma);
void omap_stop_lcd_dma(void)
{
w &= ~(1 << 8);
omap_writew(w, OMAP1610_DMA_LCD_CTRL);
}
+EXPORT_SYMBOL(omap_stop_lcd_dma);
/*----------------------------------------------------------------------------*/
continue;
if (cpu_class_is_omap1()) {
- /* request_irq() doesn't like dev_id (ie. ch) being
- * zero, so we have to kludge around this. */
+ /*
+ * request_irq() doesn't like dev_id (ie. ch) being
+ * zero, so we have to kludge around this.
+ */
r = request_irq(omap1_dma_irq[ch],
omap1_dma_irq_handler, 0, "DMA",
(void *) (ch + 1));
arch_initcall(omap_init_dma);
-EXPORT_SYMBOL(omap_get_dma_src_pos);
-EXPORT_SYMBOL(omap_get_dma_dst_pos);
-EXPORT_SYMBOL(omap_get_dma_src_addr_counter);
-EXPORT_SYMBOL(omap_clear_dma);
-EXPORT_SYMBOL(omap_set_dma_priority);
-EXPORT_SYMBOL(omap_request_dma);
-EXPORT_SYMBOL(omap_free_dma);
-EXPORT_SYMBOL(omap_start_dma);
-EXPORT_SYMBOL(omap_stop_dma);
-EXPORT_SYMBOL(omap_set_dma_callback);
-EXPORT_SYMBOL(omap_enable_dma_irq);
-EXPORT_SYMBOL(omap_disable_dma_irq);
-
-EXPORT_SYMBOL(omap_set_dma_transfer_params);
-EXPORT_SYMBOL(omap_set_dma_color_mode);
-EXPORT_SYMBOL(omap_set_dma_write_mode);
-
-EXPORT_SYMBOL(omap_set_dma_src_params);
-EXPORT_SYMBOL(omap_set_dma_src_index);
-EXPORT_SYMBOL(omap_set_dma_src_data_pack);
-EXPORT_SYMBOL(omap_set_dma_src_burst_mode);
-
-EXPORT_SYMBOL(omap_set_dma_dest_params);
-EXPORT_SYMBOL(omap_set_dma_dest_index);
-EXPORT_SYMBOL(omap_set_dma_dest_data_pack);
-EXPORT_SYMBOL(omap_set_dma_dest_burst_mode);
-
-EXPORT_SYMBOL(omap_set_dma_params);
-
-EXPORT_SYMBOL(omap_dma_link_lch);
-EXPORT_SYMBOL(omap_dma_unlink_lch);
-
-EXPORT_SYMBOL(omap_request_lcd_dma);
-EXPORT_SYMBOL(omap_free_lcd_dma);
-EXPORT_SYMBOL(omap_enable_lcd_dma);
-EXPORT_SYMBOL(omap_setup_lcd_dma);
-EXPORT_SYMBOL(omap_stop_lcd_dma);
-EXPORT_SYMBOL(omap_set_lcd_dma_b1);
-EXPORT_SYMBOL(omap_set_lcd_dma_single_transfer);
-EXPORT_SYMBOL(omap_set_lcd_dma_ext_controller);
-EXPORT_SYMBOL(omap_set_lcd_dma_b1_rotation);
-EXPORT_SYMBOL(omap_set_lcd_dma_b1_vxres);
-EXPORT_SYMBOL(omap_set_lcd_dma_b1_scale);
-EXPORT_SYMBOL(omap_set_lcd_dma_b1_mirror);
projects / linux-2.6-omap-h63xx.git / commitdiff