1 // SPDX-License-Identifier: GPL-2.0-only
3  * linux/arch/arm/mach-omap1/lcd_dma.c
5  * Extracted from arch/arm/plat-omap/dma.c
6  * Copyright (C) 2003 - 2008 Nokia Corporation
11  * OMAP2/3 support Copyright (C) 2004-2007 Texas Instruments, Inc.
13  * Some functions based on earlier dma-omap.c Copyright (C) 2001 RidgeRun, Inc.
16  * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
26 #include <linux/omap-dma.h>
28 #include <linux/soc/ti/omap1-soc.h>
29 #include <linux/soc/ti/omap1-io.h>
135 	unsigned long top, bottom;  in set_b1_regs()  local
165 #define PIXSTEP(sx, sy, dx, dy) (PIXADDR(dx, dy) - PIXADDR(sx, sy) - es + 1)  in set_b1_regs()
170 			top = PIXADDR(0, 0);  in set_b1_regs()
171 			bottom = PIXADDR(lcd_dma.xres - 1, lcd_dma.yres - 1);  in set_b1_regs()
178 			fi = PIXSTEP(lcd_dma.xres - 1, 0, 0, 1);  in set_b1_regs()
180 			top = PIXADDR(lcd_dma.xres - 1, 0);  in set_b1_regs()
181 			bottom = PIXADDR(0, lcd_dma.yres - 1);  in set_b1_regs()
183 			fi = PIXSTEP(0, 0, lcd_dma.xres - 1, 1);  in set_b1_regs()
190 			top = PIXADDR(0, lcd_dma.yres - 1);  in set_b1_regs()
191 			bottom = PIXADDR(lcd_dma.xres - 1, 0);  in set_b1_regs()
193 			fi = PIXSTEP(0, 0, 1, lcd_dma.yres - 1);  in set_b1_regs()
195 			top = PIXADDR(lcd_dma.xres - 1, lcd_dma.yres - 1);  in set_b1_regs()
198 			fi = PIXSTEP(1, 0, 0, lcd_dma.yres - 1);  in set_b1_regs()
205 			top = PIXADDR(lcd_dma.xres - 1, lcd_dma.yres - 1);  in set_b1_regs()
208 			fi = PIXSTEP(0, 1, lcd_dma.xres - 1, 0);  in set_b1_regs()
210 			top = PIXADDR(0, lcd_dma.yres - 1);  in set_b1_regs()
211 			bottom = PIXADDR(lcd_dma.xres - 1, 0);  in set_b1_regs()
213 			fi = PIXSTEP(lcd_dma.xres - 1, 1, 0, 0);  in set_b1_regs()
220 			top = PIXADDR(lcd_dma.xres - 1, 0);  in set_b1_regs()
221 			bottom = PIXADDR(0, lcd_dma.yres - 1);  in set_b1_regs()
223 			fi = PIXSTEP(1, lcd_dma.yres - 1, 0, 0);  in set_b1_regs()
225 			top = PIXADDR(0, 0);  in set_b1_regs()
226 			bottom = PIXADDR(lcd_dma.xres - 1, lcd_dma.yres - 1);  in set_b1_regs()
228 			fi = PIXSTEP(0, lcd_dma.yres - 1, 1, 0);  in set_b1_regs()
239 		omap_writew(top >> 16, OMAP1510_DMA_LCD_TOP_F1_U);  in set_b1_regs()
240 		omap_writew(top, OMAP1510_DMA_LCD_TOP_F1_L);  in set_b1_regs()
248 	omap_writew(top >> 16, OMAP1610_DMA_LCD_TOP_B1_U);  in set_b1_regs()
249 	omap_writew(top, OMAP1610_DMA_LCD_TOP_B1_L);  in set_b1_regs()
262 	/* Always set the source port as SDRAM for now*/  in set_b1_regs()
275 	/* Set the double-indexed addressing mode */  in set_b1_regs()
311 		return -EBUSY;  in omap_request_lcd_dma()
353 	 * Set the Enable bit only if an external controller is  in omap_enable_lcd_dma()
376 		/* Set some reasonable defaults */  in omap_setup_lcd_dma()
387 		 * If DMA was already active set the end_prog bit to have  in omap_setup_lcd_dma()
388 		 * the programmed register set loaded into the active  in omap_setup_lcd_dma()
389 		 * register set.  in omap_setup_lcd_dma()
422 		return -ENODEV;  in omap_init_lcd_dma()