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u-boot/drivers/video/mx3fb.c
Guennadi Liakhovetski 0c99f6ab31 video: add an 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@denx.de>
Acked-by: Anatolij Gustschin <agust@denx.de>
2009-02-24 10:22:59 +01:00

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/*
* Copyright (C) 2009
* Guennadi Liakhovetski, DENX Software Engineering, <lg@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.
* @width: width of panel in pixels.
* @height: height of panel in pixels.
* @pixel_fmt: pixel format of buffer as FOURCC ASCII code.
* @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 the 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(&params, bpp_to_pixfmt(BIT_PER_PIXEL),
XRES, YRES, stride_bytes);
ipu_ch_param_set_buffer(&params, 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 *)&params, 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.
* @return: 0 on success or negative error code on failure.
*/
static int mx3fb_set_par(void)
{
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();
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 lcdbase 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;
}
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