[U-Boot] [PATCH 8/9 v2] video: add a i.MX31 framebuffer driver
Guennadi Liakhovetski
lg at denx.de
Thu Feb 5 13:32:48 CET 2009
Add a driver for the Synchronous Display Controller and the Display
Interface on i.MX31, using IPU for DMA channel setup. So far only
displaying of bitmaps is supported, no text output.
Signed-off-by: Guennadi Liakhovetski <lg at denx.de>
---
Changes since v1: added breaks, shorter title, splitted long lines,
unified style.
>From eec7cc435a822b2b29b6828e8e068dc4c4dcc122 Mon Sep 17 00:00:00 2001
From: Guennadi Liakhovetski <lg at denx.de>
Date: Thu, 5 Feb 2009 13:15:54 +0100
Subject: [PATCH] video: add a i.MX31 framebuffer driver
Add a driver for the Synchronous Display Controller and the Display
Interface on i.MX31, using IPU for DMA channel setup. So far only
displaying of bitmaps is supported, no text output.
Signed-off-by: Guennadi Liakhovetski <lg at denx.de>
---
drivers/video/Makefile | 1 +
drivers/video/mx3fb.c | 871 ++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 872 insertions(+), 0 deletions(-)
create mode 100644 drivers/video/mx3fb.c
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index 84d4cb7..bc00852 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -31,6 +31,7 @@ COBJS-$(CONFIG_CFB_CONSOLE) += cfb_console.o
COBJS-$(CONFIG_S6E63D6) += s6e63d6.o
COBJS-$(CONFIG_VIDEO_CT69000) += ct69000.o
COBJS-$(CONFIG_VIDEO_MB862xx) += mb862xx.o
+COBJS-$(CONFIG_VIDEO_MX3) += mx3fb.o
COBJS-$(CONFIG_VIDEO_SED13806) += sed13806.o
COBJS-$(CONFIG_SED156X) += sed156x.o
COBJS-$(CONFIG_VIDEO_SM501) += sm501.o
diff --git a/drivers/video/mx3fb.c b/drivers/video/mx3fb.c
new file mode 100644
index 0000000..d9b673e
--- /dev/null
+++ b/drivers/video/mx3fb.c
@@ -0,0 +1,871 @@
+/*
+ * Copyright (C) 2009
+ * Guennadi Liakhovetski, DENX Software Engineering, <lg at denx.de>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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 <lcd.h>
+#include <asm/arch/mx31.h>
+#include <asm/arch/mx31-regs.h>
+#include <asm/errno.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+void *lcd_base; /* Start of framebuffer memory */
+void *lcd_console_address; /* Start of console buffer */
+
+int lcd_line_length;
+int lcd_color_fg;
+int lcd_color_bg;
+
+short console_col;
+short console_row;
+
+void lcd_initcolregs(void)
+{
+}
+
+void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
+{
+}
+
+void lcd_disable(void)
+{
+}
+
+void lcd_panel_disable(void)
+{
+}
+
+#define msleep(a) udelay(a * 1000)
+
+#define XRES 240
+#define YRES 320
+#define PANEL_TYPE IPU_PANEL_TFT
+#define PIXEL_CLK 185925
+#define PIXEL_FMT IPU_PIX_FMT_RGB666
+#define H_START_WIDTH 9 /* left_margin */
+#define H_SYNC_WIDTH 1 /* hsync_len */
+#define H_END_WIDTH (16 + 1) /* right_margin + hsync_len */
+#define V_START_WIDTH 7 /* upper_margin */
+#define V_SYNC_WIDTH 1 /* vsync_len */
+#define V_END_WIDTH (9 + 1) /* lower_margin + vsync_len */
+#define SIG_POL (DI_D3_DRDY_SHARP_POL | DI_D3_CLK_POL)
+#define IF_CONF 0
+#define IF_CLK_DIV 0x175
+
+#define LCD_COLOR_IPU LCD_COLOR16
+
+static ushort colormap[256];
+
+vidinfo_t panel_info = {
+ .vl_col = XRES,
+ .vl_row = YRES,
+ .vl_bpix = LCD_COLOR_IPU,
+ .cmap = colormap,
+};
+
+#define BIT_PER_PIXEL NBITS(LCD_COLOR_IPU)
+
+/* IPU DMA Controller channel definitions. */
+enum ipu_channel {
+ IDMAC_IC_0 = 0, /* IC (encoding task) to memory */
+ IDMAC_IC_1 = 1, /* IC (viewfinder task) to memory */
+ IDMAC_ADC_0 = 1,
+ IDMAC_IC_2 = 2,
+ IDMAC_ADC_1 = 2,
+ IDMAC_IC_3 = 3,
+ IDMAC_IC_4 = 4,
+ IDMAC_IC_5 = 5,
+ IDMAC_IC_6 = 6,
+ IDMAC_IC_7 = 7, /* IC (sensor data) to memory */
+ IDMAC_IC_8 = 8,
+ IDMAC_IC_9 = 9,
+ IDMAC_IC_10 = 10,
+ IDMAC_IC_11 = 11,
+ IDMAC_IC_12 = 12,
+ IDMAC_IC_13 = 13,
+ IDMAC_SDC_0 = 14, /* Background synchronous display data */
+ IDMAC_SDC_1 = 15, /* Foreground data (overlay) */
+ IDMAC_SDC_2 = 16,
+ IDMAC_SDC_3 = 17,
+ IDMAC_ADC_2 = 18,
+ IDMAC_ADC_3 = 19,
+ IDMAC_ADC_4 = 20,
+ IDMAC_ADC_5 = 21,
+ IDMAC_ADC_6 = 22,
+ IDMAC_ADC_7 = 23,
+ IDMAC_PF_0 = 24,
+ IDMAC_PF_1 = 25,
+ IDMAC_PF_2 = 26,
+ IDMAC_PF_3 = 27,
+ IDMAC_PF_4 = 28,
+ IDMAC_PF_5 = 29,
+ IDMAC_PF_6 = 30,
+ IDMAC_PF_7 = 31,
+};
+
+/* More formats can be copied from the Linux driver if needed */
+enum pixel_fmt {
+ /* 2 bytes */
+ IPU_PIX_FMT_RGB565,
+ IPU_PIX_FMT_RGB666,
+ IPU_PIX_FMT_BGR666,
+ /* 3 bytes */
+ IPU_PIX_FMT_RGB24,
+};
+
+struct pixel_fmt_cfg {
+ u32 b0;
+ u32 b1;
+ u32 b2;
+ u32 acc;
+};
+
+static struct pixel_fmt_cfg fmt_cfg[] = {
+ [IPU_PIX_FMT_RGB24] = {
+ 0x1600AAAA, 0x00E05555, 0x00070000, 3,
+ },
+ [IPU_PIX_FMT_RGB666] = {
+ 0x0005000F, 0x000B000F, 0x0011000F, 1,
+ },
+ [IPU_PIX_FMT_BGR666] = {
+ 0x0011000F, 0x000B000F, 0x0005000F, 1,
+ },
+ [IPU_PIX_FMT_RGB565] = {
+ 0x0004003F, 0x000A000F, 0x000F003F, 1,
+ }
+};
+
+enum ipu_panel {
+ IPU_PANEL_SHARP_TFT,
+ IPU_PANEL_TFT,
+};
+
+/* IPU Common registers */
+/* IPU_CONF and its bits already defined in mx31-regs.h */
+#define IPU_CHA_BUF0_RDY (0x04 + IPU_BASE)
+#define IPU_CHA_BUF1_RDY (0x08 + IPU_BASE)
+#define IPU_CHA_DB_MODE_SEL (0x0C + IPU_BASE)
+#define IPU_CHA_CUR_BUF (0x10 + IPU_BASE)
+#define IPU_FS_PROC_FLOW (0x14 + IPU_BASE)
+#define IPU_FS_DISP_FLOW (0x18 + IPU_BASE)
+#define IPU_TASKS_STAT (0x1C + IPU_BASE)
+#define IPU_IMA_ADDR (0x20 + IPU_BASE)
+#define IPU_IMA_DATA (0x24 + IPU_BASE)
+#define IPU_INT_CTRL_1 (0x28 + IPU_BASE)
+#define IPU_INT_CTRL_2 (0x2C + IPU_BASE)
+#define IPU_INT_CTRL_3 (0x30 + IPU_BASE)
+#define IPU_INT_CTRL_4 (0x34 + IPU_BASE)
+#define IPU_INT_CTRL_5 (0x38 + IPU_BASE)
+#define IPU_INT_STAT_1 (0x3C + IPU_BASE)
+#define IPU_INT_STAT_2 (0x40 + IPU_BASE)
+#define IPU_INT_STAT_3 (0x44 + IPU_BASE)
+#define IPU_INT_STAT_4 (0x48 + IPU_BASE)
+#define IPU_INT_STAT_5 (0x4C + IPU_BASE)
+#define IPU_BRK_CTRL_1 (0x50 + IPU_BASE)
+#define IPU_BRK_CTRL_2 (0x54 + IPU_BASE)
+#define IPU_BRK_STAT (0x58 + IPU_BASE)
+#define IPU_DIAGB_CTRL (0x5C + IPU_BASE)
+
+/* Image Converter Registers */
+#define IC_CONF (0x88 + IPU_BASE)
+#define IC_PRP_ENC_RSC (0x8C + IPU_BASE)
+#define IC_PRP_VF_RSC (0x90 + IPU_BASE)
+#define IC_PP_RSC (0x94 + IPU_BASE)
+#define IC_CMBP_1 (0x98 + IPU_BASE)
+#define IC_CMBP_2 (0x9C + IPU_BASE)
+#define PF_CONF (0xA0 + IPU_BASE)
+#define IDMAC_CONF (0xA4 + IPU_BASE)
+#define IDMAC_CHA_EN (0xA8 + IPU_BASE)
+#define IDMAC_CHA_PRI (0xAC + IPU_BASE)
+#define IDMAC_CHA_BUSY (0xB0 + IPU_BASE)
+
+/* Image Converter Register bits */
+#define IC_CONF_PRPENC_EN 0x00000001
+#define IC_CONF_PRPENC_CSC1 0x00000002
+#define IC_CONF_PRPENC_ROT_EN 0x00000004
+#define IC_CONF_PRPVF_EN 0x00000100
+#define IC_CONF_PRPVF_CSC1 0x00000200
+#define IC_CONF_PRPVF_CSC2 0x00000400
+#define IC_CONF_PRPVF_CMB 0x00000800
+#define IC_CONF_PRPVF_ROT_EN 0x00001000
+#define IC_CONF_PP_EN 0x00010000
+#define IC_CONF_PP_CSC1 0x00020000
+#define IC_CONF_PP_CSC2 0x00040000
+#define IC_CONF_PP_CMB 0x00080000
+#define IC_CONF_PP_ROT_EN 0x00100000
+#define IC_CONF_IC_GLB_LOC_A 0x10000000
+#define IC_CONF_KEY_COLOR_EN 0x20000000
+#define IC_CONF_RWS_EN 0x40000000
+#define IC_CONF_CSI_MEM_WR_EN 0x80000000
+
+/* SDC Registers */
+#define SDC_COM_CONF (0xB4 + IPU_BASE)
+#define SDC_GW_CTRL (0xB8 + IPU_BASE)
+#define SDC_FG_POS (0xBC + IPU_BASE)
+#define SDC_BG_POS (0xC0 + IPU_BASE)
+#define SDC_CUR_POS (0xC4 + IPU_BASE)
+#define SDC_PWM_CTRL (0xC8 + IPU_BASE)
+#define SDC_CUR_MAP (0xCC + IPU_BASE)
+#define SDC_HOR_CONF (0xD0 + IPU_BASE)
+#define SDC_VER_CONF (0xD4 + IPU_BASE)
+#define SDC_SHARP_CONF_1 (0xD8 + IPU_BASE)
+#define SDC_SHARP_CONF_2 (0xDC + IPU_BASE)
+
+/* Register bits */
+#define SDC_COM_TFT_COLOR 0x00000001UL
+#define SDC_COM_FG_EN 0x00000010UL
+#define SDC_COM_GWSEL 0x00000020UL
+#define SDC_COM_GLB_A 0x00000040UL
+#define SDC_COM_KEY_COLOR_G 0x00000080UL
+#define SDC_COM_BG_EN 0x00000200UL
+#define SDC_COM_SHARP 0x00001000UL
+
+#define SDC_V_SYNC_WIDTH_L 0x00000001UL
+
+/* Display Interface registers */
+#define DI_DISP_IF_CONF (0x0124 + IPU_BASE)
+#define DI_DISP_SIG_POL (0x0128 + IPU_BASE)
+#define DI_SER_DISP1_CONF (0x012C + IPU_BASE)
+#define DI_SER_DISP2_CONF (0x0130 + IPU_BASE)
+#define DI_HSP_CLK_PER (0x0134 + IPU_BASE)
+#define DI_DISP0_TIME_CONF_1 (0x0138 + IPU_BASE)
+#define DI_DISP0_TIME_CONF_2 (0x013C + IPU_BASE)
+#define DI_DISP0_TIME_CONF_3 (0x0140 + IPU_BASE)
+#define DI_DISP1_TIME_CONF_1 (0x0144 + IPU_BASE)
+#define DI_DISP1_TIME_CONF_2 (0x0148 + IPU_BASE)
+#define DI_DISP1_TIME_CONF_3 (0x014C + IPU_BASE)
+#define DI_DISP2_TIME_CONF_1 (0x0150 + IPU_BASE)
+#define DI_DISP2_TIME_CONF_2 (0x0154 + IPU_BASE)
+#define DI_DISP2_TIME_CONF_3 (0x0158 + IPU_BASE)
+#define DI_DISP3_TIME_CONF (0x015C + IPU_BASE)
+#define DI_DISP0_DB0_MAP (0x0160 + IPU_BASE)
+#define DI_DISP0_DB1_MAP (0x0164 + IPU_BASE)
+#define DI_DISP0_DB2_MAP (0x0168 + IPU_BASE)
+#define DI_DISP0_CB0_MAP (0x016C + IPU_BASE)
+#define DI_DISP0_CB1_MAP (0x0170 + IPU_BASE)
+#define DI_DISP0_CB2_MAP (0x0174 + IPU_BASE)
+#define DI_DISP1_DB0_MAP (0x0178 + IPU_BASE)
+#define DI_DISP1_DB1_MAP (0x017C + IPU_BASE)
+#define DI_DISP1_DB2_MAP (0x0180 + IPU_BASE)
+#define DI_DISP1_CB0_MAP (0x0184 + IPU_BASE)
+#define DI_DISP1_CB1_MAP (0x0188 + IPU_BASE)
+#define DI_DISP1_CB2_MAP (0x018C + IPU_BASE)
+#define DI_DISP2_DB0_MAP (0x0190 + IPU_BASE)
+#define DI_DISP2_DB1_MAP (0x0194 + IPU_BASE)
+#define DI_DISP2_DB2_MAP (0x0198 + IPU_BASE)
+#define DI_DISP2_CB0_MAP (0x019C + IPU_BASE)
+#define DI_DISP2_CB1_MAP (0x01A0 + IPU_BASE)
+#define DI_DISP2_CB2_MAP (0x01A4 + IPU_BASE)
+#define DI_DISP3_B0_MAP (0x01A8 + IPU_BASE)
+#define DI_DISP3_B1_MAP (0x01AC + IPU_BASE)
+#define DI_DISP3_B2_MAP (0x01B0 + IPU_BASE)
+#define DI_DISP_ACC_CC (0x01B4 + IPU_BASE)
+#define DI_DISP_LLA_CONF (0x01B8 + IPU_BASE)
+#define DI_DISP_LLA_DATA (0x01BC + IPU_BASE)
+
+/* DI_DISP_SIG_POL bits */
+#define DI_D3_VSYNC_POL (1 << 28)
+#define DI_D3_HSYNC_POL (1 << 27)
+#define DI_D3_DRDY_SHARP_POL (1 << 26)
+#define DI_D3_CLK_POL (1 << 25)
+#define DI_D3_DATA_POL (1 << 24)
+
+/* DI_DISP_IF_CONF bits */
+#define DI_D3_CLK_IDLE (1 << 26)
+#define DI_D3_CLK_SEL (1 << 25)
+#define DI_D3_DATAMSK (1 << 24)
+
+#define IOMUX_PADNUM_MASK 0x1ff
+#define IOMUX_GPIONUM_SHIFT 9
+#define IOMUX_GPIONUM_MASK (0xff << IOMUX_GPIONUM_SHIFT)
+
+#define IOMUX_PIN(gpionum, padnum) ((padnum) & IOMUX_PADNUM_MASK)
+
+#define IOMUX_MODE_L(pin, mode) IOMUX_MODE(((pin) + 0xc) ^ 3, mode)
+
+enum lcd_pin {
+ MX31_PIN_D3_SPL = IOMUX_PIN(0xff, 19),
+ MX31_PIN_D3_CLS = IOMUX_PIN(0xff, 20),
+ MX31_PIN_D3_REV = IOMUX_PIN(0xff, 21),
+ MX31_PIN_CONTRAST = IOMUX_PIN(0xff, 22),
+ MX31_PIN_VSYNC3 = IOMUX_PIN(0xff, 23),
+
+ MX31_PIN_DRDY0 = IOMUX_PIN(0xff, 33),
+ MX31_PIN_FPSHIFT = IOMUX_PIN(0xff, 34),
+ MX31_PIN_HSYNC = IOMUX_PIN(0xff, 35),
+
+ MX31_PIN_LD17 = IOMUX_PIN(0xff, 37),
+ MX31_PIN_LD16 = IOMUX_PIN(0xff, 38),
+ MX31_PIN_LD15 = IOMUX_PIN(0xff, 39),
+ MX31_PIN_LD14 = IOMUX_PIN(0xff, 40),
+ MX31_PIN_LD13 = IOMUX_PIN(0xff, 41),
+ MX31_PIN_LD12 = IOMUX_PIN(0xff, 42),
+ MX31_PIN_LD11 = IOMUX_PIN(0xff, 43),
+ MX31_PIN_LD10 = IOMUX_PIN(0xff, 44),
+ MX31_PIN_LD9 = IOMUX_PIN(0xff, 45),
+ MX31_PIN_LD8 = IOMUX_PIN(0xff, 46),
+ MX31_PIN_LD7 = IOMUX_PIN(0xff, 47),
+ MX31_PIN_LD6 = IOMUX_PIN(0xff, 48),
+ MX31_PIN_LD5 = IOMUX_PIN(0xff, 49),
+ MX31_PIN_LD4 = IOMUX_PIN(0xff, 50),
+ MX31_PIN_LD3 = IOMUX_PIN(0xff, 51),
+ MX31_PIN_LD2 = IOMUX_PIN(0xff, 52),
+ MX31_PIN_LD1 = IOMUX_PIN(0xff, 53),
+ MX31_PIN_LD0 = IOMUX_PIN(0xff, 54),
+};
+
+struct chan_param_mem_planar {
+ /* Word 0 */
+ u32 xv:10;
+ u32 yv:10;
+ u32 xb:12;
+
+ u32 yb:12;
+ u32 res1:2;
+ u32 nsb:1;
+ u32 lnpb:6;
+ u32 ubo_l:11;
+
+ u32 ubo_h:15;
+ u32 vbo_l:17;
+
+ u32 vbo_h:9;
+ u32 res2:3;
+ u32 fw:12;
+ u32 fh_l:8;
+
+ u32 fh_h:4;
+ u32 res3:28;
+
+ /* Word 1 */
+ u32 eba0;
+
+ u32 eba1;
+
+ u32 bpp:3;
+ u32 sl:14;
+ u32 pfs:3;
+ u32 bam:3;
+ u32 res4:2;
+ u32 npb:6;
+ u32 res5:1;
+
+ u32 sat:2;
+ u32 res6:30;
+} __attribute__ ((packed));
+
+struct chan_param_mem_interleaved {
+ /* Word 0 */
+ u32 xv:10;
+ u32 yv:10;
+ u32 xb:12;
+
+ u32 yb:12;
+ u32 sce:1;
+ u32 res1:1;
+ u32 nsb:1;
+ u32 lnpb:6;
+ u32 sx:10;
+ u32 sy_l:1;
+
+ u32 sy_h:9;
+ u32 ns:10;
+ u32 sm:10;
+ u32 sdx_l:3;
+
+ u32 sdx_h:2;
+ u32 sdy:5;
+ u32 sdrx:1;
+ u32 sdry:1;
+ u32 sdr1:1;
+ u32 res2:2;
+ u32 fw:12;
+ u32 fh_l:8;
+
+ u32 fh_h:4;
+ u32 res3:28;
+
+ /* Word 1 */
+ u32 eba0;
+
+ u32 eba1;
+
+ u32 bpp:3;
+ u32 sl:14;
+ u32 pfs:3;
+ u32 bam:3;
+ u32 res4:2;
+ u32 npb:6;
+ u32 res5:1;
+
+ u32 sat:2;
+ u32 scc:1;
+ u32 ofs0:5;
+ u32 ofs1:5;
+ u32 ofs2:5;
+ u32 ofs3:5;
+ u32 wid0:3;
+ u32 wid1:3;
+ u32 wid2:3;
+
+ u32 wid3:3;
+ u32 dec_sel:1;
+ u32 res6:28;
+} __attribute__ ((packed));
+
+union chan_param_mem {
+ struct chan_param_mem_planar pp;
+ struct chan_param_mem_interleaved ip;
+};
+
+static inline u32 reg_read(unsigned long reg)
+{
+ return __REG(reg);
+}
+
+static inline void reg_write(u32 value, unsigned long reg)
+{
+ __REG(reg) = value;
+}
+
+/**
+ * sdc_init_panel() - initialize a synchronous LCD panel.
+ * @mx3fb: mx3fb context.
+ * @panel: panel type.
+ * @pixel_clk: desired pixel clock frequency in Hz.
+ * @width: width of panel in pixels.
+ * @height: height of panel in pixels.
+ * @pixel_fmt: pixel format of buffer as FOURCC ASCII code.
+ * @h_start_width: number of pixel clocks between the HSYNC signal pulse
+ * and the start of valid data.
+ * @h_sync_width: width of the HSYNC signal in units of pixel clocks.
+ * @h_end_width: number of pixel clocks between the end of valid data
+ * and the HSYNC signal for next line.
+ * @v_start_width: number of lines between the VSYNC signal pulse and the
+ * start of valid data.
+ * @v_sync_width: width of the VSYNC signal in units of lines
+ * @v_end_width: number of lines between the end of valid data and the
+ * VSYNC signal for next frame.
+ * @sig: bitfield of signal polarities for LCD interface.
+ * @return: 0 on success or negative error code on failure.
+ */
+static int sdc_init_panel(u16 width, u16 height, enum pixel_fmt pixel_fmt)
+{
+ u32 reg;
+ uint32_t old_conf;
+
+ /* Init panel size and blanking periods */
+ reg = ((H_SYNC_WIDTH - 1) << 26) |
+ ((u32)(width + H_START_WIDTH + H_END_WIDTH - 1) << 16);
+ reg_write(reg, SDC_HOR_CONF);
+
+ reg = ((V_SYNC_WIDTH - 1) << 26) | SDC_V_SYNC_WIDTH_L |
+ ((u32)(height + V_START_WIDTH + V_END_WIDTH - 1) << 16);
+ reg_write(reg, SDC_VER_CONF);
+
+ switch (PANEL_TYPE) {
+ case IPU_PANEL_SHARP_TFT:
+ reg_write(0x00FD0102L, SDC_SHARP_CONF_1);
+ reg_write(0x00F500F4L, SDC_SHARP_CONF_2);
+ reg_write(SDC_COM_SHARP | SDC_COM_TFT_COLOR, SDC_COM_CONF);
+ break;
+ case IPU_PANEL_TFT:
+ reg_write(SDC_COM_TFT_COLOR, SDC_COM_CONF);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* Init clocking */
+
+ /*
+ * Calculate divider: fractional part is 4 bits so simply multiple by
+ * 2^4 to get fractional part, as long as we stay under ~250MHz and on
+ * i.MX31 it (HSP_CLK) is <= 178MHz. Currently 128.267MHz
+ */
+
+ reg_write((((IF_CLK_DIV / 8) - 1) << 22) |
+ IF_CLK_DIV, DI_DISP3_TIME_CONF);
+
+ /* DI settings */
+ old_conf = reg_read(DI_DISP_IF_CONF) & 0x78FFFFFF;
+ reg_write(old_conf | IF_CONF, DI_DISP_IF_CONF);
+
+ old_conf = reg_read(DI_DISP_SIG_POL) & 0xE0FFFFFF;
+ reg_write(old_conf | SIG_POL, DI_DISP_SIG_POL);
+
+ reg_write(fmt_cfg[pixel_fmt].b0, DI_DISP3_B0_MAP);
+ reg_write(fmt_cfg[pixel_fmt].b1, DI_DISP3_B1_MAP);
+ reg_write(fmt_cfg[pixel_fmt].b2, DI_DISP3_B2_MAP);
+ reg_write(reg_read(DI_DISP_ACC_CC) |
+ ((fmt_cfg[pixel_fmt].acc - 1) << 12), DI_DISP_ACC_CC);
+
+ return 0;
+}
+
+static void ipu_ch_param_set_size(union chan_param_mem *params,
+ uint32_t pixel_fmt, uint16_t width,
+ uint16_t height, uint16_t stride)
+{
+ params->pp.fw = width - 1;
+ params->pp.fh_l = height - 1;
+ params->pp.fh_h = (height - 1) >> 8;
+ params->pp.sl = stride - 1;
+
+ /* See above, for further formats see tge Linux driver */
+ switch (pixel_fmt) {
+ case IPU_PIX_FMT_RGB565:
+ params->ip.bpp = 2;
+ params->ip.pfs = 4;
+ params->ip.npb = 7;
+ params->ip.sat = 2; /* SAT = 32-bit access */
+ params->ip.ofs0 = 0; /* Red bit offset */
+ params->ip.ofs1 = 5; /* Green bit offset */
+ params->ip.ofs2 = 11; /* Blue bit offset */
+ params->ip.ofs3 = 16; /* Alpha bit offset */
+ params->ip.wid0 = 4; /* Red bit width - 1 */
+ params->ip.wid1 = 5; /* Green bit width - 1 */
+ params->ip.wid2 = 4; /* Blue bit width - 1 */
+ break;
+ case IPU_PIX_FMT_RGB24:
+ params->ip.bpp = 1; /* 24 BPP & RGB PFS */
+ params->ip.pfs = 4;
+ params->ip.npb = 7;
+ params->ip.sat = 2; /* SAT = 32-bit access */
+ params->ip.ofs0 = 16; /* Red bit offset */
+ params->ip.ofs1 = 8; /* Green bit offset */
+ params->ip.ofs2 = 0; /* Blue bit offset */
+ params->ip.ofs3 = 24; /* Alpha bit offset */
+ params->ip.wid0 = 7; /* Red bit width - 1 */
+ params->ip.wid1 = 7; /* Green bit width - 1 */
+ params->ip.wid2 = 7; /* Blue bit width - 1 */
+ break;
+ default:
+ break;
+ }
+
+ params->pp.nsb = 1;
+}
+
+static void ipu_ch_param_set_buffer(union chan_param_mem *params,
+ void *buf0, void *buf1)
+{
+ params->pp.eba0 = (u32)buf0;
+ params->pp.eba1 = (u32)buf1;
+}
+
+static void ipu_write_param_mem(uint32_t addr, uint32_t *data,
+ uint32_t num_words)
+{
+ for (; num_words > 0; num_words--) {
+ reg_write(addr, IPU_IMA_ADDR);
+ reg_write(*data++, IPU_IMA_DATA);
+ addr++;
+ if ((addr & 0x7) == 5) {
+ addr &= ~0x7; /* set to word 0 */
+ addr += 8; /* increment to next row */
+ }
+ }
+}
+
+static uint32_t bpp_to_pixfmt(int bpp)
+{
+ switch (bpp) {
+ case 16:
+ return IPU_PIX_FMT_RGB565;
+ default:
+ return 0;
+ }
+}
+
+static uint32_t dma_param_addr(enum ipu_channel channel)
+{
+ /* Channel Parameter Memory */
+ return 0x10000 | (channel << 4);
+}
+
+static void ipu_init_channel_buffer(enum ipu_channel channel, void *fbmem)
+{
+ union chan_param_mem params = {};
+ uint32_t reg;
+ uint32_t stride_bytes;
+
+ stride_bytes = (XRES * ((BIT_PER_PIXEL + 7) / 8) + 3) & ~3;
+
+ /* Build parameter memory data for DMA channel */
+ ipu_ch_param_set_size(¶ms, bpp_to_pixfmt(BIT_PER_PIXEL),
+ XRES, YRES, stride_bytes);
+ ipu_ch_param_set_buffer(¶ms, fbmem, NULL);
+ params.pp.bam = 0;
+ /* Some channels (rotation) have restriction on burst length */
+
+ switch (channel) {
+ case IDMAC_SDC_0:
+ /* In original code only IPU_PIX_FMT_RGB565 was setting burst */
+ params.pp.npb = 16 - 1;
+ break;
+ default:
+ break;
+ }
+
+ ipu_write_param_mem(dma_param_addr(channel), (uint32_t *)¶ms, 10);
+
+ /* Disable double-buffering */
+ reg = reg_read(IPU_CHA_DB_MODE_SEL);
+ reg &= ~(1UL << channel);
+ reg_write(reg, IPU_CHA_DB_MODE_SEL);
+}
+
+static void ipu_channel_set_priority(enum ipu_channel channel,
+ int prio)
+{
+ u32 reg = reg_read(IDMAC_CHA_PRI);
+
+ if (prio)
+ reg |= 1UL << channel;
+ else
+ reg &= ~(1UL << channel);
+
+ reg_write(reg, IDMAC_CHA_PRI);
+}
+
+/**
+ * ipu_enable_channel() - enable an IPU channel.
+ * @channel: channel ID.
+ * @return: 0 on success or negative error code on failure.
+ */
+static int ipu_enable_channel(enum ipu_channel channel)
+{
+ uint32_t reg;
+
+ /* Reset to buffer 0 */
+ reg_write(1UL << channel, IPU_CHA_CUR_BUF);
+
+ switch (channel) {
+ case IDMAC_SDC_0:
+ ipu_channel_set_priority(channel, 1);
+ break;
+ default:
+ break;
+ }
+
+ reg = reg_read(IDMAC_CHA_EN);
+ reg_write(reg | (1UL << channel), IDMAC_CHA_EN);
+
+ return 0;
+}
+
+static int ipu_update_channel_buffer(enum ipu_channel channel, void *buf)
+{
+ uint32_t reg;
+
+ reg = reg_read(IPU_CHA_BUF0_RDY);
+ if (reg & (1UL << channel))
+ return -EACCES;
+
+ /* 44.3.3.1.9 - Row Number 1 (WORD1, offset 0) */
+ reg_write(dma_param_addr(channel) + 0x0008UL, IPU_IMA_ADDR);
+ reg_write((u32)buf, IPU_IMA_DATA);
+
+ return 0;
+}
+
+static int idmac_tx_submit(enum ipu_channel channel, void *buf)
+{
+ int ret;
+
+ ipu_init_channel_buffer(channel, buf);
+
+
+ /* ipu_idmac.c::ipu_submit_channel_buffers() */
+ ret = ipu_update_channel_buffer(channel, buf);
+ if (ret < 0)
+ return ret;
+
+ /* ipu_idmac.c::ipu_select_buffer() */
+ /* Mark buffer 0 as ready. */
+ reg_write(1UL << channel, IPU_CHA_BUF0_RDY);
+
+
+ ret = ipu_enable_channel(channel);
+ return ret;
+}
+
+static void sdc_enable_channel(void *fbmem)
+{
+ int ret;
+ u32 reg;
+
+ ret = idmac_tx_submit(IDMAC_SDC_0, fbmem);
+
+ /* mx3fb.c::sdc_fb_init() */
+ if (ret >= 0) {
+ reg = reg_read(SDC_COM_CONF);
+ reg_write(reg | SDC_COM_BG_EN, SDC_COM_CONF);
+ }
+
+ /*
+ * Attention! Without this msleep the channel keeps generating
+ * interrupts. Next sdc_set_brightness() is going to be called
+ * from mx3fb_blank().
+ */
+ msleep(2);
+}
+
+/**
+ * mx3fb_set_par() - set framebuffer parameters and change the operating mode.
+ * @fbi: framebuffer information pointer.
+ * @return: 0 on success or negative error code on failure.
+ */
+static int mx3fb_set_par(void *fbmem)
+{
+ int ret;
+
+ ret = sdc_init_panel(XRES, YRES, PIXEL_FMT);
+ if (ret < 0)
+ return ret;
+
+ reg_write((H_START_WIDTH << 16) | V_START_WIDTH, SDC_BG_POS);
+
+ return 0;
+}
+
+/* References in this function refer to respective Linux kernel sources */
+void lcd_enable(void)
+{
+ u32 reg;
+
+ /* pcm037.c::mxc_board_init() */
+
+ /* Display Interface #3 */
+ mx31_gpio_mux(IOMUX_MODE_L(MX31_PIN_LD0, MUX_CTL_FUNC));
+ mx31_gpio_mux(IOMUX_MODE_L(MX31_PIN_LD1, MUX_CTL_FUNC));
+ mx31_gpio_mux(IOMUX_MODE_L(MX31_PIN_LD2, MUX_CTL_FUNC));
+ mx31_gpio_mux(IOMUX_MODE_L(MX31_PIN_LD3, MUX_CTL_FUNC));
+ mx31_gpio_mux(IOMUX_MODE_L(MX31_PIN_LD4, MUX_CTL_FUNC));
+ mx31_gpio_mux(IOMUX_MODE_L(MX31_PIN_LD5, MUX_CTL_FUNC));
+ mx31_gpio_mux(IOMUX_MODE_L(MX31_PIN_LD6, MUX_CTL_FUNC));
+ mx31_gpio_mux(IOMUX_MODE_L(MX31_PIN_LD7, MUX_CTL_FUNC));
+ mx31_gpio_mux(IOMUX_MODE_L(MX31_PIN_LD8, MUX_CTL_FUNC));
+ mx31_gpio_mux(IOMUX_MODE_L(MX31_PIN_LD9, MUX_CTL_FUNC));
+ mx31_gpio_mux(IOMUX_MODE_L(MX31_PIN_LD10, MUX_CTL_FUNC));
+ mx31_gpio_mux(IOMUX_MODE_L(MX31_PIN_LD11, MUX_CTL_FUNC));
+ mx31_gpio_mux(IOMUX_MODE_L(MX31_PIN_LD12, MUX_CTL_FUNC));
+ mx31_gpio_mux(IOMUX_MODE_L(MX31_PIN_LD13, MUX_CTL_FUNC));
+ mx31_gpio_mux(IOMUX_MODE_L(MX31_PIN_LD14, MUX_CTL_FUNC));
+ mx31_gpio_mux(IOMUX_MODE_L(MX31_PIN_LD15, MUX_CTL_FUNC));
+ mx31_gpio_mux(IOMUX_MODE_L(MX31_PIN_LD16, MUX_CTL_FUNC));
+ mx31_gpio_mux(IOMUX_MODE_L(MX31_PIN_LD17, MUX_CTL_FUNC));
+ mx31_gpio_mux(IOMUX_MODE_L(MX31_PIN_VSYNC3, MUX_CTL_FUNC));
+ mx31_gpio_mux(IOMUX_MODE_L(MX31_PIN_HSYNC, MUX_CTL_FUNC));
+ mx31_gpio_mux(IOMUX_MODE_L(MX31_PIN_FPSHIFT, MUX_CTL_FUNC));
+ mx31_gpio_mux(IOMUX_MODE_L(MX31_PIN_DRDY0, MUX_CTL_FUNC));
+ mx31_gpio_mux(IOMUX_MODE_L(MX31_PIN_D3_REV, MUX_CTL_FUNC));
+ mx31_gpio_mux(IOMUX_MODE_L(MX31_PIN_CONTRAST, MUX_CTL_FUNC));
+ mx31_gpio_mux(IOMUX_MODE_L(MX31_PIN_D3_SPL, MUX_CTL_FUNC));
+ mx31_gpio_mux(IOMUX_MODE_L(MX31_PIN_D3_CLS, MUX_CTL_FUNC));
+
+
+ /* ipu_idmac.c::ipu_probe() */
+
+ /* Start the clock */
+ __REG(CCM_CGR1) = __REG(CCM_CGR1) | (3 << 22);
+
+
+ /* ipu_idmac.c::ipu_idmac_init() */
+
+ /* Service request counter to maximum - shouldn't be needed */
+ reg_write(0x00000070, IDMAC_CONF);
+
+
+ /* ipu_idmac.c::ipu_init_channel() */
+
+ /* Enable IPU sub modules */
+ reg = reg_read(IPU_CONF) | IPU_CONF_SDC_EN | IPU_CONF_DI_EN;
+ reg_write(reg, IPU_CONF);
+
+
+ /* mx3fb.c::init_fb_chan() */
+
+ /* set Display Interface clock period */
+ reg_write(0x00100010L, DI_HSP_CLK_PER);
+ /* Might need to trigger HSP clock change - see 44.3.3.8.5 */
+
+
+ /* mx3fb.c::sdc_set_brightness() */
+
+ /* This might be board-specific */
+ reg_write(0x03000000UL | 255 << 16, SDC_PWM_CTRL);
+
+
+ /* mx3fb.c::sdc_set_global_alpha() */
+
+ /* Use global - not per-pixel - Alpha-blending */
+ reg = reg_read(SDC_GW_CTRL) & 0x00FFFFFFL;
+ reg_write(reg | ((uint32_t) 0xff << 24), SDC_GW_CTRL);
+
+ reg = reg_read(SDC_COM_CONF);
+ reg_write(reg | SDC_COM_GLB_A, SDC_COM_CONF);
+
+
+ /* mx3fb.c::sdc_set_color_key() */
+
+ /* Disable colour-keying for background */
+ reg = reg_read(SDC_COM_CONF) &
+ ~(SDC_COM_GWSEL | SDC_COM_KEY_COLOR_G);
+ reg_write(reg, SDC_COM_CONF);
+
+
+ mx3fb_set_par(lcd_base);
+
+ sdc_enable_channel(lcd_base);
+
+ /*
+ * Linux driver calls sdc_set_brightness() here again,
+ * once is enough for us
+ */
+}
+
+void lcd_ctrl_init(void *lcdbase)
+{
+ u32 mem_len = XRES * YRES * BIT_PER_PIXEL / 8;
+ /*
+ * We rely on fbmem being a physical address, i.e., either MMU off,
+ * or 1-to-1 mapping. Might want to add some virt2phys here.
+ */
+ if (!lcdbase)
+ return;
+
+ memset(lcdbase, 0, mem_len);
+}
+
+ulong calc_fbsize(void)
+{
+ return ((panel_info.vl_col * panel_info.vl_row *
+ NBITS(panel_info.vl_bpix)) / 8) + PAGE_SIZE;
+}
+
+int overwrite_console(void)
+{
+ /* Keep stdout / stderr on serial, our LCD is for splashscreen only */
+ return 1;
+}
--
1.5.4
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