omap1: DMA: move LCD related code from plat-omap to mach-omap1
All of the LCD DMA code in plat-omap/dma.c appears to be OMAP1-only (and
apparently only is available on a subset of OMAP1 chips).
Move this code to mach-omap1/lcd_dma.c.
Tested on OMAP1510 Amstrad Delta.
Compile-tested with omap_generic_2420_defconfig.
Reported-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Reviewed-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c
index d17375e..09d82b3 100644
--- a/arch/arm/plat-omap/dma.c
+++ b/arch/arm/plat-omap/dma.c
@@ -47,7 +47,6 @@
#endif
#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)
@@ -1120,17 +1119,8 @@
{
int lch;
- /*
- * On OMAP1510, internal LCD controller will start the transfer
- * when it gets enabled, so assume DMA running if LCD enabled.
- */
- if (cpu_is_omap1510())
- if (omap_readw(0xfffec000 + 0x00) & (1 << 0))
- return 1;
-
- /* Check if LCD DMA is running */
- if (cpu_is_omap16xx())
- if (omap_readw(OMAP1610_DMA_LCD_CCR) & OMAP_DMA_CCR_EN)
+ if (cpu_class_is_omap1())
+ if (omap_lcd_dma_running())
return 1;
for (lch = 0; lch < dma_chan_count; lch++)
@@ -1990,377 +1980,6 @@
/*----------------------------------------------------------------------------*/
-static struct lcd_dma_info {
- spinlock_t lock;
- int reserved;
- void (*callback)(u16 status, void *data);
- void *cb_data;
-
- int active;
- unsigned long addr, size;
- int rotate, data_type, xres, yres;
- int vxres;
- int mirror;
- int xscale, yscale;
- int ext_ctrl;
- int src_port;
- int single_transfer;
-} lcd_dma;
-
-void omap_set_lcd_dma_b1(unsigned long addr, u16 fb_xres, u16 fb_yres,
- int data_type)
-{
- lcd_dma.addr = addr;
- lcd_dma.data_type = data_type;
- 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.src_port = port;
-}
-
-void omap_set_lcd_dma_ext_controller(int external)
-{
- 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)
-{
- if (omap_dma_in_1510_mode()) {
- printk(KERN_ERR "DMA rotation is not supported in 1510 mode\n");
- BUG();
- return;
- }
- lcd_dma.rotate = rotate;
-}
-EXPORT_SYMBOL(omap_set_lcd_dma_b1_rotation);
-
-void omap_set_lcd_dma_b1_mirror(int mirror)
-{
- if (omap_dma_in_1510_mode()) {
- printk(KERN_ERR "DMA mirror is not supported in 1510 mode\n");
- BUG();
- }
- lcd_dma.mirror = mirror;
-}
-EXPORT_SYMBOL(omap_set_lcd_dma_b1_mirror);
-
-void omap_set_lcd_dma_b1_vxres(unsigned long vxres)
-{
- if (omap_dma_in_1510_mode()) {
- printk(KERN_ERR "DMA virtual resulotion is not supported "
- "in 1510 mode\n");
- BUG();
- }
- 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)
-{
- if (omap_dma_in_1510_mode()) {
- printk(KERN_ERR "DMA scale is not supported in 1510 mode\n");
- BUG();
- }
- lcd_dma.xscale = xscale;
- lcd_dma.yscale = yscale;
-}
-EXPORT_SYMBOL(omap_set_lcd_dma_b1_scale);
-
-static void set_b1_regs(void)
-{
- unsigned long top, bottom;
- int es;
- u16 w;
- unsigned long en, fn;
- long ei, fi;
- unsigned long vxres;
- unsigned int xscale, yscale;
-
- switch (lcd_dma.data_type) {
- case OMAP_DMA_DATA_TYPE_S8:
- es = 1;
- break;
- case OMAP_DMA_DATA_TYPE_S16:
- es = 2;
- break;
- case OMAP_DMA_DATA_TYPE_S32:
- es = 4;
- break;
- default:
- BUG();
- return;
- }
-
- vxres = lcd_dma.vxres ? lcd_dma.vxres : lcd_dma.xres;
- 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 PIXSTEP(sx, sy, dx, dy) (PIXADDR(dx, dy) - PIXADDR(sx, sy) - es + 1)
-
- switch (lcd_dma.rotate) {
- case 0:
- if (!lcd_dma.mirror) {
- top = PIXADDR(0, 0);
- bottom = PIXADDR(lcd_dma.xres - 1, lcd_dma.yres - 1);
- /* 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;
- ei = PIXSTEP(0, 0, 1, 0);
- fi = PIXSTEP(lcd_dma.xres - 1, 0, 0, 1);
- } else {
- top = PIXADDR(lcd_dma.xres - 1, 0);
- bottom = PIXADDR(0, lcd_dma.yres - 1);
- ei = PIXSTEP(1, 0, 0, 0);
- fi = PIXSTEP(0, 0, lcd_dma.xres - 1, 1);
- }
- en = lcd_dma.xres;
- fn = lcd_dma.yres;
- break;
- case 90:
- if (!lcd_dma.mirror) {
- top = PIXADDR(0, lcd_dma.yres - 1);
- bottom = PIXADDR(lcd_dma.xres - 1, 0);
- ei = PIXSTEP(0, 1, 0, 0);
- fi = PIXSTEP(0, 0, 1, lcd_dma.yres - 1);
- } else {
- top = PIXADDR(lcd_dma.xres - 1, lcd_dma.yres - 1);
- bottom = PIXADDR(0, 0);
- ei = PIXSTEP(0, 1, 0, 0);
- fi = PIXSTEP(1, 0, 0, lcd_dma.yres - 1);
- }
- en = lcd_dma.yres;
- fn = lcd_dma.xres;
- break;
- case 180:
- if (!lcd_dma.mirror) {
- top = PIXADDR(lcd_dma.xres - 1, lcd_dma.yres - 1);
- bottom = PIXADDR(0, 0);
- ei = PIXSTEP(1, 0, 0, 0);
- fi = PIXSTEP(0, 1, lcd_dma.xres - 1, 0);
- } else {
- top = PIXADDR(0, lcd_dma.yres - 1);
- bottom = PIXADDR(lcd_dma.xres - 1, 0);
- ei = PIXSTEP(0, 0, 1, 0);
- fi = PIXSTEP(lcd_dma.xres - 1, 1, 0, 0);
- }
- en = lcd_dma.xres;
- fn = lcd_dma.yres;
- break;
- case 270:
- if (!lcd_dma.mirror) {
- top = PIXADDR(lcd_dma.xres - 1, 0);
- bottom = PIXADDR(0, lcd_dma.yres - 1);
- ei = PIXSTEP(0, 0, 0, 1);
- fi = PIXSTEP(1, lcd_dma.yres - 1, 0, 0);
- } else {
- top = PIXADDR(0, 0);
- bottom = PIXADDR(lcd_dma.xres - 1, lcd_dma.yres - 1);
- ei = PIXSTEP(0, 0, 0, 1);
- fi = PIXSTEP(0, lcd_dma.yres - 1, 1, 0);
- }
- en = lcd_dma.yres;
- fn = lcd_dma.xres;
- break;
- default:
- BUG();
- return; /* Suppress warning about uninitialized vars */
- }
-
- if (omap_dma_in_1510_mode()) {
- omap_writew(top >> 16, OMAP1510_DMA_LCD_TOP_F1_U);
- omap_writew(top, OMAP1510_DMA_LCD_TOP_F1_L);
- omap_writew(bottom >> 16, OMAP1510_DMA_LCD_BOT_F1_U);
- omap_writew(bottom, OMAP1510_DMA_LCD_BOT_F1_L);
-
- return;
- }
-
- /* 1610 regs */
- omap_writew(top >> 16, OMAP1610_DMA_LCD_TOP_B1_U);
- omap_writew(top, OMAP1610_DMA_LCD_TOP_B1_L);
- omap_writew(bottom >> 16, OMAP1610_DMA_LCD_BOT_B1_U);
- omap_writew(bottom, OMAP1610_DMA_LCD_BOT_B1_L);
-
- omap_writew(en, OMAP1610_DMA_LCD_SRC_EN_B1);
- omap_writew(fn, OMAP1610_DMA_LCD_SRC_FN_B1);
-
- w = omap_readw(OMAP1610_DMA_LCD_CSDP);
- w &= ~0x03;
- w |= lcd_dma.data_type;
- omap_writew(w, OMAP1610_DMA_LCD_CSDP);
-
- w = omap_readw(OMAP1610_DMA_LCD_CTRL);
- /* Always set the source port as SDRAM for now*/
- w &= ~(0x03 << 6);
- if (lcd_dma.callback != NULL)
- w |= 1 << 1; /* Block interrupt enable */
- else
- w &= ~(1 << 1);
- omap_writew(w, OMAP1610_DMA_LCD_CTRL);
-
- if (!(lcd_dma.rotate || lcd_dma.mirror ||
- lcd_dma.vxres || lcd_dma.xscale || lcd_dma.yscale))
- return;
-
- w = omap_readw(OMAP1610_DMA_LCD_CCR);
- /* Set the double-indexed addressing mode */
- w |= (0x03 << 12);
- omap_writew(w, OMAP1610_DMA_LCD_CCR);
-
- omap_writew(ei, OMAP1610_DMA_LCD_SRC_EI_B1);
- omap_writew(fi >> 16, OMAP1610_DMA_LCD_SRC_FI_B1_U);
- omap_writew(fi, OMAP1610_DMA_LCD_SRC_FI_B1_L);
-}
-
-static irqreturn_t lcd_dma_irq_handler(int irq, void *dev_id)
-{
- u16 w;
-
- w = omap_readw(OMAP1610_DMA_LCD_CTRL);
- if (unlikely(!(w & (1 << 3)))) {
- printk(KERN_WARNING "Spurious LCD DMA IRQ\n");
- return IRQ_NONE;
- }
- /* Ack the IRQ */
- w |= (1 << 3);
- omap_writew(w, OMAP1610_DMA_LCD_CTRL);
- lcd_dma.active = 0;
- if (lcd_dma.callback != NULL)
- lcd_dma.callback(w, lcd_dma.cb_data);
-
- return IRQ_HANDLED;
-}
-
-int omap_request_lcd_dma(void (*callback)(u16 status, void *data),
- void *data)
-{
- spin_lock_irq(&lcd_dma.lock);
- if (lcd_dma.reserved) {
- spin_unlock_irq(&lcd_dma.lock);
- printk(KERN_ERR "LCD DMA channel already reserved\n");
- BUG();
- return -EBUSY;
- }
- lcd_dma.reserved = 1;
- spin_unlock_irq(&lcd_dma.lock);
- lcd_dma.callback = callback;
- lcd_dma.cb_data = data;
- lcd_dma.active = 0;
- lcd_dma.single_transfer = 0;
- lcd_dma.rotate = 0;
- lcd_dma.vxres = 0;
- lcd_dma.mirror = 0;
- lcd_dma.xscale = 0;
- lcd_dma.yscale = 0;
- lcd_dma.ext_ctrl = 0;
- lcd_dma.src_port = 0;
-
- return 0;
-}
-EXPORT_SYMBOL(omap_request_lcd_dma);
-
-void omap_free_lcd_dma(void)
-{
- spin_lock(&lcd_dma.lock);
- if (!lcd_dma.reserved) {
- spin_unlock(&lcd_dma.lock);
- printk(KERN_ERR "LCD DMA is not reserved\n");
- BUG();
- return;
- }
- if (!enable_1510_mode)
- omap_writew(omap_readw(OMAP1610_DMA_LCD_CCR) & ~1,
- OMAP1610_DMA_LCD_CCR);
- 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
- * connected. Otherwise the OMAP internal controller will
- * start the transfer when it gets enabled.
- */
- if (enable_1510_mode || !lcd_dma.ext_ctrl)
- return;
-
- w = omap_readw(OMAP1610_DMA_LCD_CTRL);
- w |= 1 << 8;
- omap_writew(w, OMAP1610_DMA_LCD_CTRL);
-
- lcd_dma.active = 1;
-
- w = omap_readw(OMAP1610_DMA_LCD_CCR);
- w |= 1 << 7;
- omap_writew(w, OMAP1610_DMA_LCD_CCR);
-}
-EXPORT_SYMBOL(omap_enable_lcd_dma);
-
-void omap_setup_lcd_dma(void)
-{
- BUG_ON(lcd_dma.active);
- if (!enable_1510_mode) {
- /* Set some reasonable defaults */
- omap_writew(0x5440, OMAP1610_DMA_LCD_CCR);
- omap_writew(0x9102, OMAP1610_DMA_LCD_CSDP);
- omap_writew(0x0004, OMAP1610_DMA_LCD_LCH_CTRL);
- }
- set_b1_regs();
- if (!enable_1510_mode) {
- u16 w;
-
- w = omap_readw(OMAP1610_DMA_LCD_CCR);
- /*
- * 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 */
- omap_writew(w, OMAP1610_DMA_LCD_CCR);
- }
-}
-EXPORT_SYMBOL(omap_setup_lcd_dma);
-
-void omap_stop_lcd_dma(void)
-{
- u16 w;
-
- lcd_dma.active = 0;
- if (enable_1510_mode || !lcd_dma.ext_ctrl)
- return;
-
- w = omap_readw(OMAP1610_DMA_LCD_CCR);
- w &= ~(1 << 7);
- omap_writew(w, OMAP1610_DMA_LCD_CCR);
-
- w = omap_readw(OMAP1610_DMA_LCD_CTRL);
- w &= ~(1 << 8);
- omap_writew(w, OMAP1610_DMA_LCD_CTRL);
-}
-EXPORT_SYMBOL(omap_stop_lcd_dma);
-
void omap_dma_global_context_save(void)
{
omap_dma_global_context.dma_irqenable_l0 =
@@ -2465,14 +2084,6 @@
dma_chan_count = 16;
} else
dma_chan_count = 9;
- if (cpu_is_omap16xx()) {
- u16 w;
-
- /* this would prevent OMAP sleep */
- w = omap_readw(OMAP1610_DMA_LCD_CTRL);
- w &= ~(1 << 8);
- omap_writew(w, OMAP1610_DMA_LCD_CTRL);
- }
} else if (cpu_class_is_omap2()) {
u8 revision = dma_read(REVISION) & 0xff;
printk(KERN_INFO "OMAP DMA hardware revision %d.%d\n",
@@ -2483,7 +2094,6 @@
return 0;
}
- spin_lock_init(&lcd_dma.lock);
spin_lock_init(&dma_chan_lock);
for (ch = 0; ch < dma_chan_count; ch++) {
@@ -2548,22 +2158,6 @@
}
}
-
- /* FIXME: Update LCD DMA to work on 24xx */
- if (cpu_class_is_omap1()) {
- r = request_irq(INT_DMA_LCD, lcd_dma_irq_handler, 0,
- "LCD DMA", NULL);
- if (r != 0) {
- int i;
-
- printk(KERN_ERR "unable to request IRQ for LCD DMA "
- "(error %d)\n", r);
- for (i = 0; i < dma_chan_count; i++)
- free_irq(omap1_dma_irq[i], (void *) (i + 1));
- goto out_free;
- }
- }
-
return 0;
out_free: