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 d17375e06a1..09d82b3c66c 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: