arm: mxs: Add MXS LCDIF driver

[karo-tx-uboot.git] / drivers / video / mxsfb.c

diff --git a/drivers/video/mxsfb.c b/drivers/video/mxsfb.c
new file mode 100644 (file)
index 0000000..461ff6e
--- /dev/null
+++ b/drivers/video/mxsfb.c
@@ -0,0 +1,189 @@
+/*
+ * Freescale i.MX23/i.MX28 LCDIF driver
+ *
+ * Copyright (C) 2011-2013 Marek Vasut <marex@denx.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#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 <asm/errno.h>
+#include <asm/io.h>
+
+#include "videomodes.h"
+
+#define        PS2KHZ(ps)      (1000000000UL / (ps))
+
+static GraphicDevice panel;
+
+/*
+ * DENX 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
+ */
+
+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(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);
+       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);
+
+       /* Sync signals ON */
+       setbits_le32(&regs->hw_lcdif_vdctrl4, LCDIF_VDCTRL4_SYNC_SIGNALS_ON);
+
+       /* FIFO cleared */
+       writel(LCDIF_CTRL1_FIFO_CLEAR, &regs->hw_lcdif_ctrl1_clr);
+
+       /* RUN! */
+       writel(LCDIF_CTRL_RUN, &regs->hw_lcdif_ctrl_set);
+}
+
+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 = getenv("videomode");
+       if (!penv) {
+               printf("MXSFB: 'videomode' variable not set!");
+               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 = malloc(panel.memSize);
+       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);
+
+       return (void *)&panel;
+}