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>

1 files changed, 2 insertions, 408 deletions

diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c
index d17375e06a1e..09d82b3c66ce 100644
--- a/arch/arm/plat-omap/dma.c
+++ b/arch/arm/plat-omap/dma.c
@@ -47,7 +47,6 @@ enum { DMA_CHAIN_STARTED, DMA_CHAIN_NOTSTARTED };
 #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 omap_dma_running(void)
 {
 	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 irqaction omap24xx_dma_irq;
 
 /*----------------------------------------------------------------------------*/
 
-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 @@ static int __init omap_init_dma(void)
 			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 @@ static int __init omap_init_dma(void)
 		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 @@ static int __init omap_init_dma(void)
 		}
 	}
 
-
-	/* 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: