mirror of
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c6941e1203
As the at91cap9adk board is removed by commit: b5508344
(ARM: remove broken "at91cap9adk" board), so the at91cap9
code is not used anymore, and also the document for
at91cap9 can not be found on www.atmel.com, so remove the
at91cap9 related code.
Signed-off-by: Bo Shen <voice.shen@atmel.com>
Acked-by: Andreas Bießmann <andreas.devel@googlemail.com>
138 lines
4.2 KiB
C
138 lines
4.2 KiB
C
/*
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* Driver for AT91/AT32 LCD Controller
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*
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* Copyright (C) 2007 Atmel Corporation
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <asm/arch/gpio.h>
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#include <asm/arch/clk.h>
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#include <lcd.h>
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#include <atmel_lcdc.h>
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/* configurable parameters */
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#define ATMEL_LCDC_CVAL_DEFAULT 0xc8
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#define ATMEL_LCDC_DMA_BURST_LEN 8
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#ifndef ATMEL_LCDC_GUARD_TIME
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#define ATMEL_LCDC_GUARD_TIME 1
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#endif
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#if defined(CONFIG_AT91SAM9263)
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#define ATMEL_LCDC_FIFO_SIZE 2048
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#else
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#define ATMEL_LCDC_FIFO_SIZE 512
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#endif
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#define lcdc_readl(mmio, reg) __raw_readl((mmio)+(reg))
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#define lcdc_writel(mmio, reg, val) __raw_writel((val), (mmio)+(reg))
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void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
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{
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#if defined(CONFIG_ATMEL_LCD_BGR555)
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lcdc_writel(panel_info.mmio, ATMEL_LCDC_LUT(regno),
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(red >> 3) | ((green & 0xf8) << 2) | ((blue & 0xf8) << 7));
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#else
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lcdc_writel(panel_info.mmio, ATMEL_LCDC_LUT(regno),
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(blue >> 3) | ((green & 0xfc) << 3) | ((red & 0xf8) << 8));
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#endif
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}
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void lcd_ctrl_init(void *lcdbase)
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{
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unsigned long value;
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/* Turn off the LCD controller and the DMA controller */
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lcdc_writel(panel_info.mmio, ATMEL_LCDC_PWRCON,
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ATMEL_LCDC_GUARD_TIME << ATMEL_LCDC_GUARDT_OFFSET);
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/* Wait for the LCDC core to become idle */
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while (lcdc_readl(panel_info.mmio, ATMEL_LCDC_PWRCON) & ATMEL_LCDC_BUSY)
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udelay(10);
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lcdc_writel(panel_info.mmio, ATMEL_LCDC_DMACON, 0);
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/* Reset LCDC DMA */
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lcdc_writel(panel_info.mmio, ATMEL_LCDC_DMACON, ATMEL_LCDC_DMARST);
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/* ...set frame size and burst length = 8 words (?) */
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value = (panel_info.vl_col * panel_info.vl_row *
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NBITS(panel_info.vl_bpix)) / 32;
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value |= ((ATMEL_LCDC_DMA_BURST_LEN - 1) << ATMEL_LCDC_BLENGTH_OFFSET);
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lcdc_writel(panel_info.mmio, ATMEL_LCDC_DMAFRMCFG, value);
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/* Set pixel clock */
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value = get_lcdc_clk_rate(0) / panel_info.vl_clk;
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if (get_lcdc_clk_rate(0) % panel_info.vl_clk)
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value++;
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value = (value / 2) - 1;
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if (!value) {
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lcdc_writel(panel_info.mmio, ATMEL_LCDC_LCDCON1, ATMEL_LCDC_BYPASS);
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} else
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lcdc_writel(panel_info.mmio, ATMEL_LCDC_LCDCON1,
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value << ATMEL_LCDC_CLKVAL_OFFSET);
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/* Initialize control register 2 */
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#ifdef CONFIG_AVR32
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value = ATMEL_LCDC_MEMOR_BIG | ATMEL_LCDC_CLKMOD_ALWAYSACTIVE;
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#else
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value = ATMEL_LCDC_MEMOR_LITTLE | ATMEL_LCDC_CLKMOD_ALWAYSACTIVE;
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#endif
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if (panel_info.vl_tft)
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value |= ATMEL_LCDC_DISTYPE_TFT;
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value |= panel_info.vl_sync;
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value |= (panel_info.vl_bpix << 5);
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lcdc_writel(panel_info.mmio, ATMEL_LCDC_LCDCON2, value);
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/* Vertical timing */
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value = (panel_info.vl_vsync_len - 1) << ATMEL_LCDC_VPW_OFFSET;
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value |= panel_info.vl_upper_margin << ATMEL_LCDC_VBP_OFFSET;
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value |= panel_info.vl_lower_margin;
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lcdc_writel(panel_info.mmio, ATMEL_LCDC_TIM1, value);
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/* Horizontal timing */
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value = (panel_info.vl_right_margin - 1) << ATMEL_LCDC_HFP_OFFSET;
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value |= (panel_info.vl_hsync_len - 1) << ATMEL_LCDC_HPW_OFFSET;
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value |= (panel_info.vl_left_margin - 1);
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lcdc_writel(panel_info.mmio, ATMEL_LCDC_TIM2, value);
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/* Display size */
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value = (panel_info.vl_col - 1) << ATMEL_LCDC_HOZVAL_OFFSET;
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value |= panel_info.vl_row - 1;
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lcdc_writel(panel_info.mmio, ATMEL_LCDC_LCDFRMCFG, value);
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/* FIFO Threshold: Use formula from data sheet */
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value = ATMEL_LCDC_FIFO_SIZE - (2 * ATMEL_LCDC_DMA_BURST_LEN + 3);
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lcdc_writel(panel_info.mmio, ATMEL_LCDC_FIFO, value);
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/* Toggle LCD_MODE every frame */
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lcdc_writel(panel_info.mmio, ATMEL_LCDC_MVAL, 0);
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/* Disable all interrupts */
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lcdc_writel(panel_info.mmio, ATMEL_LCDC_IDR, ~0UL);
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/* Set contrast */
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value = ATMEL_LCDC_PS_DIV8 |
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ATMEL_LCDC_ENA_PWMENABLE;
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if (!panel_info.vl_cont_pol_low)
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value |= ATMEL_LCDC_POL_POSITIVE;
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lcdc_writel(panel_info.mmio, ATMEL_LCDC_CONTRAST_CTR, value);
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lcdc_writel(panel_info.mmio, ATMEL_LCDC_CONTRAST_VAL, ATMEL_LCDC_CVAL_DEFAULT);
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/* Set framebuffer DMA base address and pixel offset */
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lcdc_writel(panel_info.mmio, ATMEL_LCDC_DMABADDR1, (u_long)lcdbase);
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lcdc_writel(panel_info.mmio, ATMEL_LCDC_DMACON, ATMEL_LCDC_DMAEN);
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lcdc_writel(panel_info.mmio, ATMEL_LCDC_PWRCON,
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(ATMEL_LCDC_GUARD_TIME << ATMEL_LCDC_GUARDT_OFFSET) | ATMEL_LCDC_PWR);
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}
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ulong calc_fbsize(void)
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{
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return ((panel_info.vl_col * panel_info.vl_row *
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NBITS(panel_info.vl_bpix)) / 8) + PAGE_SIZE;
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}
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