diff options
Diffstat (limited to 'drivers/video/mx3fb.c')
| -rw-r--r-- | drivers/video/mx3fb.c | 856 |
1 files changed, 856 insertions, 0 deletions
diff --git a/drivers/video/mx3fb.c b/drivers/video/mx3fb.c new file mode 100644 index 0000000..1e1d507 --- /dev/null +++ b/drivers/video/mx3fb.c @@ -0,0 +1,856 @@ +/* + * 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(¶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. + * @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; +} |