u-boot/drivers/video/mxsfb.c

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/*
* Freescale i.MX23/i.MX28 LCDIF driver
*
* Copyright (C) 2011-2013 Marek Vasut <marex@denx.de>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <malloc.h>
#include <video_fb.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/clock.h>
#include <asm/arch/sys_proto.h>
#include <linux/errno.h>
#include <asm/io.h>
imx: reorganize IMX code as other SOCs Change is consistent with other SOCs and it is in preparation for adding SOMs. SOC's related files are moved from cpu/ to mach-imx/<SOC>. This change is also coherent with the structure in kernel. Signed-off-by: Stefano Babic <sbabic@denx.de> CC: Fabio Estevam <fabio.estevam@nxp.com> CC: Akshay Bhat <akshaybhat@timesys.com> CC: Ken Lin <Ken.Lin@advantech.com.tw> CC: Marek Vasut <marek.vasut@gmail.com> CC: Heiko Schocher <hs@denx.de> CC: "Sébastien Szymanski" <sebastien.szymanski@armadeus.com> CC: Christian Gmeiner <christian.gmeiner@gmail.com> CC: Stefan Roese <sr@denx.de> CC: Patrick Bruenn <p.bruenn@beckhoff.com> CC: Troy Kisky <troy.kisky@boundarydevices.com> CC: Nikita Kiryanov <nikita@compulab.co.il> CC: Otavio Salvador <otavio@ossystems.com.br> CC: "Eric Bénard" <eric@eukrea.com> CC: Jagan Teki <jagan@amarulasolutions.com> CC: Ye Li <ye.li@nxp.com> CC: Peng Fan <peng.fan@nxp.com> CC: Adrian Alonso <adrian.alonso@nxp.com> CC: Alison Wang <b18965@freescale.com> CC: Tim Harvey <tharvey@gateworks.com> CC: Martin Donnelly <martin.donnelly@ge.com> CC: Marcin Niestroj <m.niestroj@grinn-global.com> CC: Lukasz Majewski <lukma@denx.de> CC: Adam Ford <aford173@gmail.com> CC: "Albert ARIBAUD (3ADEV)" <albert.aribaud@3adev.fr> CC: Boris Brezillon <boris.brezillon@free-electrons.com> CC: Soeren Moch <smoch@web.de> CC: Richard Hu <richard.hu@technexion.com> CC: Wig Cheng <wig.cheng@technexion.com> CC: Vanessa Maegima <vanessa.maegima@nxp.com> CC: Max Krummenacher <max.krummenacher@toradex.com> CC: Stefan Agner <stefan.agner@toradex.com> CC: Markus Niebel <Markus.Niebel@tq-group.com> CC: Breno Lima <breno.lima@nxp.com> CC: Francesco Montefoschi <francesco.montefoschi@udoo.org> CC: Jaehoon Chung <jh80.chung@samsung.com> CC: Scott Wood <oss@buserror.net> CC: Joe Hershberger <joe.hershberger@ni.com> CC: Anatolij Gustschin <agust@denx.de> CC: Simon Glass <sjg@chromium.org> CC: "Andrew F. Davis" <afd@ti.com> CC: "Łukasz Majewski" <l.majewski@samsung.com> CC: Patrice Chotard <patrice.chotard@st.com> CC: Nobuhiro Iwamatsu <iwamatsu@nigauri.org> CC: Hans de Goede <hdegoede@redhat.com> CC: Masahiro Yamada <yamada.masahiro@socionext.com> CC: Stephen Warren <swarren@nvidia.com> CC: Andre Przywara <andre.przywara@arm.com> CC: "Álvaro Fernández Rojas" <noltari@gmail.com> CC: York Sun <york.sun@nxp.com> CC: Xiaoliang Yang <xiaoliang.yang@nxp.com> CC: Chen-Yu Tsai <wens@csie.org> CC: George McCollister <george.mccollister@gmail.com> CC: Sven Ebenfeld <sven.ebenfeld@gmail.com> CC: Filip Brozovic <fbrozovic@gmail.com> CC: Petr Kulhavy <brain@jikos.cz> CC: Eric Nelson <eric@nelint.com> CC: Bai Ping <ping.bai@nxp.com> CC: Anson Huang <Anson.Huang@nxp.com> CC: Sanchayan Maity <maitysanchayan@gmail.com> CC: Lokesh Vutla <lokeshvutla@ti.com> CC: Patrick Delaunay <patrick.delaunay@st.com> CC: Gary Bisson <gary.bisson@boundarydevices.com> CC: Alexander Graf <agraf@suse.de> CC: u-boot@lists.denx.de Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com> Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
2017-06-29 08:16:06 +00:00
#include <asm/mach-imx/dma.h>
#include "videomodes.h"
#define PS2KHZ(ps) (1000000000UL / (ps))
static GraphicDevice panel;
struct mxs_dma_desc desc;
/**
* mxsfb_system_setup() - Fine-tune LCDIF configuration
*
* This function is used to adjust the LCDIF configuration. This is usually
* needed when driving the controller in System-Mode to operate an 8080 or
* 6800 connected SmartLCD.
*/
__weak void mxsfb_system_setup(void)
{
}
/*
* ARIES M28EVK:
* setenv videomode
* video=ctfb:x:800,y:480,depth:18,mode:0,pclk:30066,
* le:0,ri:256,up:0,lo:45,hs:1,vs:1,sync:100663296,vmode:0
*
* Freescale mx23evk/mx28evk with a Seiko 4.3'' WVGA panel:
* setenv videomode
* video=ctfb:x:800,y:480,depth:24,mode:0,pclk:29851,
* le:89,ri:164,up:23,lo:10,hs:10,vs:10,sync:0,vmode:0
*/
static void mxs_lcd_init(GraphicDevice *panel,
struct ctfb_res_modes *mode, int bpp)
{
struct mxs_lcdif_regs *regs = (struct mxs_lcdif_regs *)MXS_LCDIF_BASE;
uint32_t word_len = 0, bus_width = 0;
uint8_t valid_data = 0;
/* Kick in the LCDIF clock */
mxs_set_lcdclk(MXS_LCDIF_BASE, PS2KHZ(mode->pixclock));
/* Restart the LCDIF block */
mxs_reset_block(&regs->hw_lcdif_ctrl_reg);
switch (bpp) {
case 24:
word_len = LCDIF_CTRL_WORD_LENGTH_24BIT;
bus_width = LCDIF_CTRL_LCD_DATABUS_WIDTH_24BIT;
valid_data = 0x7;
break;
case 18:
word_len = LCDIF_CTRL_WORD_LENGTH_24BIT;
bus_width = LCDIF_CTRL_LCD_DATABUS_WIDTH_18BIT;
valid_data = 0x7;
break;
case 16:
word_len = LCDIF_CTRL_WORD_LENGTH_16BIT;
bus_width = LCDIF_CTRL_LCD_DATABUS_WIDTH_16BIT;
valid_data = 0xf;
break;
case 8:
word_len = LCDIF_CTRL_WORD_LENGTH_8BIT;
bus_width = LCDIF_CTRL_LCD_DATABUS_WIDTH_8BIT;
valid_data = 0xf;
break;
}
writel(bus_width | word_len | LCDIF_CTRL_DOTCLK_MODE |
LCDIF_CTRL_BYPASS_COUNT | LCDIF_CTRL_LCDIF_MASTER,
&regs->hw_lcdif_ctrl);
writel(valid_data << LCDIF_CTRL1_BYTE_PACKING_FORMAT_OFFSET,
&regs->hw_lcdif_ctrl1);
mxsfb_system_setup();
writel((mode->yres << LCDIF_TRANSFER_COUNT_V_COUNT_OFFSET) | mode->xres,
&regs->hw_lcdif_transfer_count);
writel(LCDIF_VDCTRL0_ENABLE_PRESENT | LCDIF_VDCTRL0_ENABLE_POL |
LCDIF_VDCTRL0_VSYNC_PERIOD_UNIT |
LCDIF_VDCTRL0_VSYNC_PULSE_WIDTH_UNIT |
mode->vsync_len, &regs->hw_lcdif_vdctrl0);
writel(mode->upper_margin + mode->lower_margin +
mode->vsync_len + mode->yres,
&regs->hw_lcdif_vdctrl1);
writel((mode->hsync_len << LCDIF_VDCTRL2_HSYNC_PULSE_WIDTH_OFFSET) |
(mode->left_margin + mode->right_margin +
mode->hsync_len + mode->xres),
&regs->hw_lcdif_vdctrl2);
writel(((mode->left_margin + mode->hsync_len) <<
LCDIF_VDCTRL3_HORIZONTAL_WAIT_CNT_OFFSET) |
(mode->upper_margin + mode->vsync_len),
&regs->hw_lcdif_vdctrl3);
writel((0 << LCDIF_VDCTRL4_DOTCLK_DLY_SEL_OFFSET) | mode->xres,
&regs->hw_lcdif_vdctrl4);
writel(panel->frameAdrs, &regs->hw_lcdif_cur_buf);
writel(panel->frameAdrs, &regs->hw_lcdif_next_buf);
/* Flush FIFO first */
writel(LCDIF_CTRL1_FIFO_CLEAR, &regs->hw_lcdif_ctrl1_set);
#ifndef CONFIG_VIDEO_MXS_MODE_SYSTEM
/* Sync signals ON */
setbits_le32(&regs->hw_lcdif_vdctrl4, LCDIF_VDCTRL4_SYNC_SIGNALS_ON);
#endif
/* FIFO cleared */
writel(LCDIF_CTRL1_FIFO_CLEAR, &regs->hw_lcdif_ctrl1_clr);
/* RUN! */
writel(LCDIF_CTRL_RUN, &regs->hw_lcdif_ctrl_set);
}
void lcdif_power_down(void)
{
struct mxs_lcdif_regs *regs = (struct mxs_lcdif_regs *)MXS_LCDIF_BASE;
int timeout = 1000000;
if (!panel.frameAdrs)
return;
writel(panel.frameAdrs, &regs->hw_lcdif_cur_buf_reg);
writel(panel.frameAdrs, &regs->hw_lcdif_next_buf_reg);
writel(LCDIF_CTRL1_VSYNC_EDGE_IRQ, &regs->hw_lcdif_ctrl1_clr);
while (--timeout) {
if (readl(&regs->hw_lcdif_ctrl1_reg) &
LCDIF_CTRL1_VSYNC_EDGE_IRQ)
break;
udelay(1);
}
mxs_reset_block((struct mxs_register_32 *)&regs->hw_lcdif_ctrl_reg);
}
void *video_hw_init(void)
{
int bpp = -1;
char *penv;
void *fb;
struct ctfb_res_modes mode;
puts("Video: ");
/* Suck display configuration from "videomode" variable */
penv = env_get("videomode");
if (!penv) {
puts("MXSFB: 'videomode' variable not set!\n");
return NULL;
}
bpp = video_get_params(&mode, penv);
/* fill in Graphic device struct */
sprintf(panel.modeIdent, "%dx%dx%d",
mode.xres, mode.yres, bpp);
panel.winSizeX = mode.xres;
panel.winSizeY = mode.yres;
panel.plnSizeX = mode.xres;
panel.plnSizeY = mode.yres;
switch (bpp) {
case 24:
case 18:
panel.gdfBytesPP = 4;
panel.gdfIndex = GDF_32BIT_X888RGB;
break;
case 16:
panel.gdfBytesPP = 2;
panel.gdfIndex = GDF_16BIT_565RGB;
break;
case 8:
panel.gdfBytesPP = 1;
panel.gdfIndex = GDF__8BIT_INDEX;
break;
default:
printf("MXSFB: Invalid BPP specified! (bpp = %i)\n", bpp);
return NULL;
}
panel.memSize = mode.xres * mode.yres * panel.gdfBytesPP;
/* Allocate framebuffer */
fb = memalign(ARCH_DMA_MINALIGN,
roundup(panel.memSize, ARCH_DMA_MINALIGN));
if (!fb) {
printf("MXSFB: Error allocating framebuffer!\n");
return NULL;
}
/* Wipe framebuffer */
memset(fb, 0, panel.memSize);
panel.frameAdrs = (u32)fb;
printf("%s\n", panel.modeIdent);
/* Start framebuffer */
mxs_lcd_init(&panel, &mode, bpp);
#ifdef CONFIG_VIDEO_MXS_MODE_SYSTEM
/*
* If the LCD runs in system mode, the LCD refresh has to be triggered
* manually by setting the RUN bit in HW_LCDIF_CTRL register. To avoid
* having to set this bit manually after every single change in the
* framebuffer memory, we set up specially crafted circular DMA, which
* sets the RUN bit, then waits until it gets cleared and repeats this
* infinitelly. This way, we get smooth continuous updates of the LCD.
*/
struct mxs_lcdif_regs *regs = (struct mxs_lcdif_regs *)MXS_LCDIF_BASE;
memset(&desc, 0, sizeof(struct mxs_dma_desc));
desc.address = (dma_addr_t)&desc;
desc.cmd.data = MXS_DMA_DESC_COMMAND_NO_DMAXFER | MXS_DMA_DESC_CHAIN |
MXS_DMA_DESC_WAIT4END |
(1 << MXS_DMA_DESC_PIO_WORDS_OFFSET);
desc.cmd.pio_words[0] = readl(&regs->hw_lcdif_ctrl) | LCDIF_CTRL_RUN;
desc.cmd.next = (uint32_t)&desc.cmd;
/* Execute the DMA chain. */
mxs_dma_circ_start(MXS_DMA_CHANNEL_AHB_APBH_LCDIF, &desc);
#endif
return (void *)&panel;
}