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u-boot/drivers/video/atmel_hlcdfb.c

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// SPDX-License-Identifier: GPL-2.0+
/*
* Driver for AT91/AT32 MULTI LAYER LCD Controller
*
* Copyright (C) 2012 Atmel Corporation
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/gpio.h>
#include <asm/arch/clk.h>
#include <clk.h>
#include <dm.h>
#include <fdtdec.h>
#include <lcd.h>
#include <video.h>
#include <wait_bit.h>
#include <atmel_hlcdc.h>
#if defined(CONFIG_LCD_LOGO)
#include <bmp_logo.h>
#endif
DECLARE_GLOBAL_DATA_PTR;
#ifndef CONFIG_DM_VIDEO
/* configurable parameters */
#define ATMEL_LCDC_CVAL_DEFAULT 0xc8
#define ATMEL_LCDC_DMA_BURST_LEN 8
#ifndef ATMEL_LCDC_GUARD_TIME
#define ATMEL_LCDC_GUARD_TIME 1
#endif
#define ATMEL_LCDC_FIFO_SIZE 512
/*
* the CLUT register map as following
* RCLUT(24 ~ 16), GCLUT(15 ~ 8), BCLUT(7 ~ 0)
*/
void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
{
writel(panel_info.mmio + ATMEL_LCDC_LUT(regno),
((red << LCDC_BASECLUT_RCLUT_Pos) & LCDC_BASECLUT_RCLUT_Msk)
| ((green << LCDC_BASECLUT_GCLUT_Pos) & LCDC_BASECLUT_GCLUT_Msk)
| ((blue << LCDC_BASECLUT_BCLUT_Pos) & LCDC_BASECLUT_BCLUT_Msk));
}
ushort *configuration_get_cmap(void)
{
#if defined(CONFIG_LCD_LOGO)
return bmp_logo_palette;
#else
return NULL;
#endif
}
void lcd_ctrl_init(void *lcdbase)
{
unsigned long value;
struct lcd_dma_desc *desc;
struct atmel_hlcd_regs *regs;
int ret;
if (!has_lcdc())
return; /* No lcdc */
regs = (struct atmel_hlcd_regs *)panel_info.mmio;
/* Disable DISP signal */
writel(LCDC_LCDDIS_DISPDIS, &regs->lcdc_lcddis);
ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_DISPSTS,
false, 1000, false);
if (ret)
printf("%s: %d: Timeout!\n", __func__, __LINE__);
/* Disable synchronization */
writel(LCDC_LCDDIS_SYNCDIS, &regs->lcdc_lcddis);
ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_LCDSTS,
false, 1000, false);
if (ret)
printf("%s: %d: Timeout!\n", __func__, __LINE__);
/* Disable pixel clock */
writel(LCDC_LCDDIS_CLKDIS, &regs->lcdc_lcddis);
ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_CLKSTS,
false, 1000, false);
if (ret)
printf("%s: %d: Timeout!\n", __func__, __LINE__);
/* Disable PWM */
writel(LCDC_LCDDIS_PWMDIS, &regs->lcdc_lcddis);
ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_PWMSTS,
false, 1000, false);
if (ret)
printf("%s: %d: Timeout!\n", __func__, __LINE__);
/* Set pixel clock */
value = get_lcdc_clk_rate(0) / panel_info.vl_clk;
if (get_lcdc_clk_rate(0) % panel_info.vl_clk)
value++;
if (value < 1) {
/* Using system clock as pixel clock */
writel(LCDC_LCDCFG0_CLKDIV(0)
| LCDC_LCDCFG0_CGDISHCR
| LCDC_LCDCFG0_CGDISHEO
| LCDC_LCDCFG0_CGDISOVR1
| LCDC_LCDCFG0_CGDISBASE
| panel_info.vl_clk_pol
| LCDC_LCDCFG0_CLKSEL,
&regs->lcdc_lcdcfg0);
} else {
writel(LCDC_LCDCFG0_CLKDIV(value - 2)
| LCDC_LCDCFG0_CGDISHCR
| LCDC_LCDCFG0_CGDISHEO
| LCDC_LCDCFG0_CGDISOVR1
| LCDC_LCDCFG0_CGDISBASE
| panel_info.vl_clk_pol,
&regs->lcdc_lcdcfg0);
}
/* Initialize control register 5 */
value = 0;
value |= panel_info.vl_sync;
#ifndef LCD_OUTPUT_BPP
/* Output is 24bpp */
value |= LCDC_LCDCFG5_MODE_OUTPUT_24BPP;
#else
switch (LCD_OUTPUT_BPP) {
case 12:
value |= LCDC_LCDCFG5_MODE_OUTPUT_12BPP;
break;
case 16:
value |= LCDC_LCDCFG5_MODE_OUTPUT_16BPP;
break;
case 18:
value |= LCDC_LCDCFG5_MODE_OUTPUT_18BPP;
break;
case 24:
value |= LCDC_LCDCFG5_MODE_OUTPUT_24BPP;
break;
default:
BUG();
break;
}
#endif
value |= LCDC_LCDCFG5_GUARDTIME(ATMEL_LCDC_GUARD_TIME);
value |= (LCDC_LCDCFG5_DISPDLY | LCDC_LCDCFG5_VSPDLYS);
writel(value, &regs->lcdc_lcdcfg5);
/* Vertical & Horizontal Timing */
value = LCDC_LCDCFG1_VSPW(panel_info.vl_vsync_len - 1);
value |= LCDC_LCDCFG1_HSPW(panel_info.vl_hsync_len - 1);
writel(value, &regs->lcdc_lcdcfg1);
value = LCDC_LCDCFG2_VBPW(panel_info.vl_upper_margin);
value |= LCDC_LCDCFG2_VFPW(panel_info.vl_lower_margin - 1);
writel(value, &regs->lcdc_lcdcfg2);
value = LCDC_LCDCFG3_HBPW(panel_info.vl_left_margin - 1);
value |= LCDC_LCDCFG3_HFPW(panel_info.vl_right_margin - 1);
writel(value, &regs->lcdc_lcdcfg3);
/* Display size */
value = LCDC_LCDCFG4_RPF(panel_info.vl_row - 1);
value |= LCDC_LCDCFG4_PPL(panel_info.vl_col - 1);
writel(value, &regs->lcdc_lcdcfg4);
writel(LCDC_BASECFG0_BLEN_AHB_INCR4 | LCDC_BASECFG0_DLBO,
&regs->lcdc_basecfg0);
switch (NBITS(panel_info.vl_bpix)) {
case 16:
writel(LCDC_BASECFG1_RGBMODE_16BPP_RGB_565,
&regs->lcdc_basecfg1);
break;
case 32:
writel(LCDC_BASECFG1_RGBMODE_24BPP_RGB_888,
&regs->lcdc_basecfg1);
break;
default:
BUG();
break;
}
writel(LCDC_BASECFG2_XSTRIDE(0), &regs->lcdc_basecfg2);
writel(0, &regs->lcdc_basecfg3);
writel(LCDC_BASECFG4_DMA, &regs->lcdc_basecfg4);
/* Disable all interrupts */
writel(~0UL, &regs->lcdc_lcdidr);
writel(~0UL, &regs->lcdc_baseidr);
/* Setup the DMA descriptor, this descriptor will loop to itself */
desc = (struct lcd_dma_desc *)(lcdbase - 16);
desc->address = (u32)lcdbase;
/* Disable DMA transfer interrupt & descriptor loaded interrupt. */
desc->control = LCDC_BASECTRL_ADDIEN | LCDC_BASECTRL_DSCRIEN
| LCDC_BASECTRL_DMAIEN | LCDC_BASECTRL_DFETCH;
desc->next = (u32)desc;
/* Flush the DMA descriptor if we enabled dcache */
flush_dcache_range((u32)desc, (u32)desc + sizeof(*desc));
writel(desc->address, &regs->lcdc_baseaddr);
writel(desc->control, &regs->lcdc_basectrl);
writel(desc->next, &regs->lcdc_basenext);
writel(LCDC_BASECHER_CHEN | LCDC_BASECHER_UPDATEEN,
&regs->lcdc_basecher);
/* Enable LCD */
value = readl(&regs->lcdc_lcden);
writel(value | LCDC_LCDEN_CLKEN, &regs->lcdc_lcden);
ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_CLKSTS,
true, 1000, false);
if (ret)
printf("%s: %d: Timeout!\n", __func__, __LINE__);
value = readl(&regs->lcdc_lcden);
writel(value | LCDC_LCDEN_SYNCEN, &regs->lcdc_lcden);
ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_LCDSTS,
true, 1000, false);
if (ret)
printf("%s: %d: Timeout!\n", __func__, __LINE__);
value = readl(&regs->lcdc_lcden);
writel(value | LCDC_LCDEN_DISPEN, &regs->lcdc_lcden);
ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_DISPSTS,
true, 1000, false);
if (ret)
printf("%s: %d: Timeout!\n", __func__, __LINE__);
value = readl(&regs->lcdc_lcden);
writel(value | LCDC_LCDEN_PWMEN, &regs->lcdc_lcden);
ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_PWMSTS,
true, 1000, false);
if (ret)
printf("%s: %d: Timeout!\n", __func__, __LINE__);
/* Enable flushing if we enabled dcache */
lcd_set_flush_dcache(1);
}
#else
enum {
LCD_MAX_WIDTH = 1024,
LCD_MAX_HEIGHT = 768,
LCD_MAX_LOG2_BPP = VIDEO_BPP16,
};
struct atmel_hlcdc_priv {
struct atmel_hlcd_regs *regs;
struct display_timing timing;
unsigned int vl_bpix;
unsigned int output_mode;
unsigned int guard_time;
ulong clk_rate;
};
static int at91_hlcdc_enable_clk(struct udevice *dev)
{
struct atmel_hlcdc_priv *priv = dev_get_priv(dev);
struct clk clk;
ulong clk_rate;
int ret;
ret = clk_get_by_index(dev, 0, &clk);
if (ret)
return -EINVAL;
ret = clk_enable(&clk);
if (ret)
return ret;
clk_rate = clk_get_rate(&clk);
if (!clk_rate) {
clk_disable(&clk);
return -ENODEV;
}
priv->clk_rate = clk_rate;
clk_free(&clk);
return 0;
}
static void atmel_hlcdc_init(struct udevice *dev)
{
struct video_uc_platdata *uc_plat = dev_get_uclass_platdata(dev);
struct atmel_hlcdc_priv *priv = dev_get_priv(dev);
struct atmel_hlcd_regs *regs = priv->regs;
struct display_timing *timing = &priv->timing;
struct lcd_dma_desc *desc;
unsigned long value, vl_clk_pol;
int ret;
/* Disable DISP signal */
writel(LCDC_LCDDIS_DISPDIS, &regs->lcdc_lcddis);
ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_DISPSTS,
false, 1000, false);
if (ret)
printf("%s: %d: Timeout!\n", __func__, __LINE__);
/* Disable synchronization */
writel(LCDC_LCDDIS_SYNCDIS, &regs->lcdc_lcddis);
ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_LCDSTS,
false, 1000, false);
if (ret)
printf("%s: %d: Timeout!\n", __func__, __LINE__);
/* Disable pixel clock */
writel(LCDC_LCDDIS_CLKDIS, &regs->lcdc_lcddis);
ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_CLKSTS,
false, 1000, false);
if (ret)
printf("%s: %d: Timeout!\n", __func__, __LINE__);
/* Disable PWM */
writel(LCDC_LCDDIS_PWMDIS, &regs->lcdc_lcddis);
ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_PWMSTS,
false, 1000, false);
if (ret)
printf("%s: %d: Timeout!\n", __func__, __LINE__);
/* Set pixel clock */
value = priv->clk_rate / timing->pixelclock.typ;
if (priv->clk_rate % timing->pixelclock.typ)
value++;
vl_clk_pol = 0;
if (timing->flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE)
vl_clk_pol = LCDC_LCDCFG0_CLKPOL;
if (value < 1) {
/* Using system clock as pixel clock */
writel(LCDC_LCDCFG0_CLKDIV(0)
| LCDC_LCDCFG0_CGDISHCR
| LCDC_LCDCFG0_CGDISHEO
| LCDC_LCDCFG0_CGDISOVR1
| LCDC_LCDCFG0_CGDISBASE
| vl_clk_pol
| LCDC_LCDCFG0_CLKSEL,
&regs->lcdc_lcdcfg0);
} else {
writel(LCDC_LCDCFG0_CLKDIV(value - 2)
| LCDC_LCDCFG0_CGDISHCR
| LCDC_LCDCFG0_CGDISHEO
| LCDC_LCDCFG0_CGDISOVR1
| LCDC_LCDCFG0_CGDISBASE
| vl_clk_pol,
&regs->lcdc_lcdcfg0);
}
/* Initialize control register 5 */
value = 0;
if (!(timing->flags & DISPLAY_FLAGS_HSYNC_HIGH))
value |= LCDC_LCDCFG5_HSPOL;
if (!(timing->flags & DISPLAY_FLAGS_VSYNC_HIGH))
value |= LCDC_LCDCFG5_VSPOL;
switch (priv->output_mode) {
case 12:
value |= LCDC_LCDCFG5_MODE_OUTPUT_12BPP;
break;
case 16:
value |= LCDC_LCDCFG5_MODE_OUTPUT_16BPP;
break;
case 18:
value |= LCDC_LCDCFG5_MODE_OUTPUT_18BPP;
break;
case 24:
value |= LCDC_LCDCFG5_MODE_OUTPUT_24BPP;
break;
default:
BUG();
break;
}
value |= LCDC_LCDCFG5_GUARDTIME(priv->guard_time);
value |= (LCDC_LCDCFG5_DISPDLY | LCDC_LCDCFG5_VSPDLYS);
writel(value, &regs->lcdc_lcdcfg5);
/* Vertical & Horizontal Timing */
value = LCDC_LCDCFG1_VSPW(timing->vsync_len.typ - 1);
value |= LCDC_LCDCFG1_HSPW(timing->hsync_len.typ - 1);
writel(value, &regs->lcdc_lcdcfg1);
value = LCDC_LCDCFG2_VBPW(timing->vback_porch.typ);
value |= LCDC_LCDCFG2_VFPW(timing->vfront_porch.typ - 1);
writel(value, &regs->lcdc_lcdcfg2);
value = LCDC_LCDCFG3_HBPW(timing->hback_porch.typ - 1);
value |= LCDC_LCDCFG3_HFPW(timing->hfront_porch.typ - 1);
writel(value, &regs->lcdc_lcdcfg3);
/* Display size */
value = LCDC_LCDCFG4_RPF(timing->vactive.typ - 1);
value |= LCDC_LCDCFG4_PPL(timing->hactive.typ - 1);
writel(value, &regs->lcdc_lcdcfg4);
writel(LCDC_BASECFG0_BLEN_AHB_INCR4 | LCDC_BASECFG0_DLBO,
&regs->lcdc_basecfg0);
switch (VNBITS(priv->vl_bpix)) {
case 16:
writel(LCDC_BASECFG1_RGBMODE_16BPP_RGB_565,
&regs->lcdc_basecfg1);
break;
case 32:
writel(LCDC_BASECFG1_RGBMODE_24BPP_RGB_888,
&regs->lcdc_basecfg1);
break;
default:
BUG();
break;
}
writel(LCDC_BASECFG2_XSTRIDE(0), &regs->lcdc_basecfg2);
writel(0, &regs->lcdc_basecfg3);
writel(LCDC_BASECFG4_DMA, &regs->lcdc_basecfg4);
/* Disable all interrupts */
writel(~0UL, &regs->lcdc_lcdidr);
writel(~0UL, &regs->lcdc_baseidr);
/* Setup the DMA descriptor, this descriptor will loop to itself */
desc = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*desc));
if (!desc)
return;
desc->address = (u32)uc_plat->base;
/* Disable DMA transfer interrupt & descriptor loaded interrupt. */
desc->control = LCDC_BASECTRL_ADDIEN | LCDC_BASECTRL_DSCRIEN
| LCDC_BASECTRL_DMAIEN | LCDC_BASECTRL_DFETCH;
desc->next = (u32)desc;
/* Flush the DMA descriptor if we enabled dcache */
flush_dcache_range((u32)desc,
ALIGN(((u32)desc + sizeof(*desc)),
CONFIG_SYS_CACHELINE_SIZE));
writel(desc->address, &regs->lcdc_baseaddr);
writel(desc->control, &regs->lcdc_basectrl);
writel(desc->next, &regs->lcdc_basenext);
writel(LCDC_BASECHER_CHEN | LCDC_BASECHER_UPDATEEN,
&regs->lcdc_basecher);
/* Enable LCD */
value = readl(&regs->lcdc_lcden);
writel(value | LCDC_LCDEN_CLKEN, &regs->lcdc_lcden);
ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_CLKSTS,
true, 1000, false);
if (ret)
printf("%s: %d: Timeout!\n", __func__, __LINE__);
value = readl(&regs->lcdc_lcden);
writel(value | LCDC_LCDEN_SYNCEN, &regs->lcdc_lcden);
ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_LCDSTS,
true, 1000, false);
if (ret)
printf("%s: %d: Timeout!\n", __func__, __LINE__);
value = readl(&regs->lcdc_lcden);
writel(value | LCDC_LCDEN_DISPEN, &regs->lcdc_lcden);
ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_DISPSTS,
true, 1000, false);
if (ret)
printf("%s: %d: Timeout!\n", __func__, __LINE__);
value = readl(&regs->lcdc_lcden);
writel(value | LCDC_LCDEN_PWMEN, &regs->lcdc_lcden);
ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_PWMSTS,
true, 1000, false);
if (ret)
printf("%s: %d: Timeout!\n", __func__, __LINE__);
}
static int atmel_hlcdc_probe(struct udevice *dev)
{
struct video_priv *uc_priv = dev_get_uclass_priv(dev);
struct atmel_hlcdc_priv *priv = dev_get_priv(dev);
int ret;
ret = at91_hlcdc_enable_clk(dev);
if (ret)
return ret;
atmel_hlcdc_init(dev);
uc_priv->xsize = priv->timing.hactive.typ;
uc_priv->ysize = priv->timing.vactive.typ;
uc_priv->bpix = priv->vl_bpix;
/* Enable flushing if we enabled dcache */
video_set_flush_dcache(dev, true);
return 0;
}
static int atmel_hlcdc_ofdata_to_platdata(struct udevice *dev)
{
struct atmel_hlcdc_priv *priv = dev_get_priv(dev);
const void *blob = gd->fdt_blob;
int node = dev_of_offset(dev);
priv->regs = (struct atmel_hlcd_regs *)devfdt_get_addr(dev);
if (!priv->regs) {
debug("%s: No display controller address\n", __func__);
return -EINVAL;
}
if (fdtdec_decode_display_timing(blob, dev_of_offset(dev),
0, &priv->timing)) {
debug("%s: Failed to decode display timing\n", __func__);
return -EINVAL;
}
if (priv->timing.hactive.typ > LCD_MAX_WIDTH)
priv->timing.hactive.typ = LCD_MAX_WIDTH;
if (priv->timing.vactive.typ > LCD_MAX_HEIGHT)
priv->timing.vactive.typ = LCD_MAX_HEIGHT;
priv->vl_bpix = fdtdec_get_int(blob, node, "atmel,vl-bpix", 0);
if (!priv->vl_bpix) {
debug("%s: Failed to get bits per pixel\n", __func__);
return -EINVAL;
}
priv->output_mode = fdtdec_get_int(blob, node, "atmel,output-mode", 24);
priv->guard_time = fdtdec_get_int(blob, node, "atmel,guard-time", 1);
return 0;
}
static int atmel_hlcdc_bind(struct udevice *dev)
{
struct video_uc_platdata *uc_plat = dev_get_uclass_platdata(dev);
uc_plat->size = LCD_MAX_WIDTH * LCD_MAX_HEIGHT *
(1 << LCD_MAX_LOG2_BPP) / 8;
debug("%s: Frame buffer size %x\n", __func__, uc_plat->size);
return 0;
}
static const struct udevice_id atmel_hlcdc_ids[] = {
{ .compatible = "atmel,sama5d2-hlcdc" },
{ .compatible = "atmel,at91sam9x5-hlcdc" },
{ }
};
U_BOOT_DRIVER(atmel_hlcdfb) = {
.name = "atmel_hlcdfb",
.id = UCLASS_VIDEO,
.of_match = atmel_hlcdc_ids,
.bind = atmel_hlcdc_bind,
.probe = atmel_hlcdc_probe,
.ofdata_to_platdata = atmel_hlcdc_ofdata_to_platdata,
.priv_auto_alloc_size = sizeof(struct atmel_hlcdc_priv),
};
#endif
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