aiot/efElectricAgingTrendMining/externalListeningThread/commandProcessing.c

/*
 * linux/arch/arm/mach-omap1/lcd_dma.c
 *
 * Extracted from arch/arm/plat-omap/dma.c
 * Copyright (C) 2003 - 2008 Nokia Corporation
 * Author: Juha Yrjölä <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.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 */

#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/io.h>

#include <linux/omap-dma.h>

#include <mach/hardware.h>
#include <mach/lcdc.h>

#include "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 {
	spinlock_t lock;
	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;
} 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_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 (cpu_is_omap15xx()) {
		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 (cpu_is_omap15xx()) {
		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 (cpu_is_omap15xx()) {
		pr_err("DMA virtual resolution 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 (cpu_is_omap15xx()) {
		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 (cpu_is_omap15xx() &&
				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 (cpu_is_omap15xx()) {
		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);