// SPDX-License-Identifier: GPL-2.0-only /* * linux / arch / arm / mach - omap1 / lcd_dma . c * * Extracted from arch / arm / plat - omap / dma . c * Copyright ( C ) 2003 - 2008 Nokia Corporation * Author : Juha Yrj ö l ä < juha . yrjola @ nokia . com > * DMA channel linking for 1610 by Samuel Ortiz < samuel . ortiz @ nokia . com > * Graphics DMA and LCD DMA graphics tranformations * by Imre Deak < imre . deak @ nokia . com > * OMAP2 / 3 support Copyright ( C ) 2004 - 2007 Texas Instruments , Inc . * Merged to support both OMAP1 and OMAP2 by Tony Lindgren < tony @ atomide . com > * Some functions based on earlier dma - omap . c Copyright ( C ) 2001 RidgeRun , Inc . * * Copyright ( C ) 2009 Texas Instruments * Added OMAP4 support - Santosh Shilimkar < santosh . shilimkar @ ti . com > * * Support functions for the OMAP internal DMA channels . #include <linux/export.h>#include <linux/module.h>#include <linux/spinlock.h>#include <linux/interrupt.h>#include <linux/io.h>#include <linux/omap-dma.h>#include <linux/soc/ti/omap1-soc.h>#include <linux/soc/ti/omap1-io.h>#include "lcdc.h" #include "lcd_dma.h" int omap_lcd_dma_running(void )/* * On OMAP1510 , internal LCD controller will start the transfer * when it gets enabled , so assume DMA running if LCD enabled . if (cpu_is_omap15xx())if (omap_readw(OMAP_LCDC_CONTROL) & OMAP_LCDC_CTRL_LCD_EN)return 1 ;/* Check if LCD DMA is running */ if (cpu_is_omap16xx())if (omap_readw(OMAP1610_DMA_LCD_CCR) & OMAP_DMA_CCR_EN)return 1 ;return 0 ;static struct lcd_dma_info {int reserved;void (*callback)(u16 status, void *data);void *cb_data;int active;unsigned long addr;int rotate, data_type, xres, yres;int vxres;int mirror;int xscale, yscale;int ext_ctrl;int src_port;int single_transfer;void omap_set_lcd_dma_b1(unsigned long addr, u16 fb_xres, u16 fb_yres,int data_type)void omap_set_lcd_dma_ext_controller(int external)void omap_set_lcd_dma_single_transfer(int single)void omap_set_lcd_dma_b1_rotation(int rotate)if (cpu_is_omap15xx()) {"DMA rotation is not supported in 1510 mode\n" );return ;void omap_set_lcd_dma_b1_mirror(int mirror)if (cpu_is_omap15xx()) {"DMA mirror is not supported in 1510 mode\n" );void omap_set_lcd_dma_b1_vxres(unsigned long vxres)if (cpu_is_omap15xx()) {"DMA virtual resolution is not supported in 1510 mode\n" );void omap_set_lcd_dma_b1_scale(unsigned int xscale, unsigned int yscale)if (cpu_is_omap15xx()) {"DMA scale is not supported in 1510 mode\n" );static void set_b1_regs(void )unsigned long top, bottom;int es;unsigned long en, fn;long ei, fi;unsigned long vxres;unsigned int xscale, yscale;switch (lcd_dma.data_type) {case OMAP_DMA_DATA_TYPE_S8:1 ;break ;case OMAP_DMA_DATA_TYPE_S16:2 ;break ;case OMAP_DMA_DATA_TYPE_S32:4 ;break ;default :return ;1 ;1 ;#define PIXADDR(x, y) (lcd_dma.addr + \#define PIXSTEP(sx, sy, dx, dy) (PIXADDR(dx, dy) - PIXADDR(sx, sy) - es + 1 )switch (lcd_dma.rotate) {case 0 :if (!lcd_dma.mirror) {0 , 0 );1 , lcd_dma.yres - 1 );/* 1510 DMA requires the bottom address to be 2 more if (cpu_is_omap15xx() &&2 ;0 , 0 , 1 , 0 );1 , 0 , 0 , 1 );else {1 , 0 );0 , lcd_dma.yres - 1 );1 , 0 , 0 , 0 );0 , 0 , lcd_dma.xres - 1 , 1 );break ;case 90 :if (!lcd_dma.mirror) {0 , lcd_dma.yres - 1 );1 , 0 );0 , 1 , 0 , 0 );0 , 0 , 1 , lcd_dma.yres - 1 );else {1 , lcd_dma.yres - 1 );0 , 0 );0 , 1 , 0 , 0 );1 , 0 , 0 , lcd_dma.yres - 1 );break ;case 180 :if (!lcd_dma.mirror) {1 , lcd_dma.yres - 1 );0 , 0 );1 , 0 , 0 , 0 );0 , 1 , lcd_dma.xres - 1 , 0 );else {0 , lcd_dma.yres - 1 );1 , 0 );0 , 0 , 1 , 0 );1 , 1 , 0 , 0 );break ;case 270 :if (!lcd_dma.mirror) {1 , 0 );0 , lcd_dma.yres - 1 );0 , 0 , 0 , 1 );1 , lcd_dma.yres - 1 , 0 , 0 );else {0 , 0 );1 , lcd_dma.yres - 1 );0 , 0 , 0 , 1 );0 , lcd_dma.yres - 1 , 1 , 0 );break ;default :return ; /* Suppress warning about uninitialized vars */ if (cpu_is_omap15xx()) {16 , OMAP1510_DMA_LCD_TOP_F1_U);16 , OMAP1510_DMA_LCD_BOT_F1_U);return ;/* 1610 regs */ 16 , OMAP1610_DMA_LCD_TOP_B1_U);16 , OMAP1610_DMA_LCD_BOT_B1_U);0 x03;/* Always set the source port as SDRAM for now*/ 0 x03 << 6 );if (lcd_dma.callback != NULL)1 << 1 ; /* Block interrupt enable */ else 1 << 1 );if (!(lcd_dma.rotate || lcd_dma.mirror ||return ;/* Set the double-indexed addressing mode */ 0 x03 << 12 );16 , OMAP1610_DMA_LCD_SRC_FI_B1_U);static irqreturn_t lcd_dma_irq_handler(int irq, void *dev_id)if (unlikely(!(w & (1 << 3 )))) {"Spurious LCD DMA IRQ\n" );return IRQ_NONE;/* Ack the IRQ */ 1 << 3 );0 ;if (lcd_dma.callback != NULL)return IRQ_HANDLED;int omap_request_lcd_dma(void (*callback)(u16 status, void *data),void *data)if (lcd_dma.reserved) {"LCD DMA channel already reserved\n" );return -EBUSY;1 ;0 ;0 ;0 ;0 ;0 ;0 ;0 ;0 ;0 ;return 0 ;void omap_free_lcd_dma(void )if (!lcd_dma.reserved) {"LCD DMA is not reserved\n" );return ;if (!cpu_is_omap15xx())1 ,0 ;void omap_enable_lcd_dma(void )/* * 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 (cpu_is_omap15xx() || !lcd_dma.ext_ctrl)return ;1 << 8 ;1 ;1 << 7 ;void omap_setup_lcd_dma(void )if (!cpu_is_omap15xx()) {/* Set some reasonable defaults */ 0 x5440, OMAP1610_DMA_LCD_CCR);0 x9102, OMAP1610_DMA_LCD_CSDP);0 x0004, OMAP1610_DMA_LCD_LCH_CTRL);if (!cpu_is_omap15xx()) {/* * If DMA was already active set the end_prog bit to have * the programmed register set loaded into the active * register set . 1 << 11 ; /* End_prog */ if (!lcd_dma.single_transfer)3 << 8 ); /* Auto_init, repeat */ void omap_stop_lcd_dma(void )0 ;if (cpu_is_omap15xx() || !lcd_dma.ext_ctrl)return ;1 << 7 );1 << 8 );static int __init omap_init_lcd_dma(void )int r;if (!cpu_class_is_omap1())return -ENODEV;if (cpu_is_omap16xx()) {/* this would prevent OMAP sleep */ 1 << 8 );"LCD DMA" , NULL);if (r != 0 )"unable to request IRQ for LCD DMA (error %d)\n" , r);return r;
Messung V0.5 in Prozent C=97 H=100 G=98
¤ Dauer der Verarbeitung: 0.10 Sekunden
(vorverarbeitet am 2026-10-11)
¤ *© Formatika GbR, Deutschland
