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u-boot-brain/drivers/video/atmel_hlcdfb.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

564 lines
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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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