| /* |
| * Copyright (C) 2008-2009 MontaVista Software Inc. |
| * Copyright (C) 2008-2009 Texas Instruments Inc |
| * |
| * Based on the LCD driver for TI Avalanche processors written by |
| * Ajay Singh and Shalom Hai. |
| * |
| * 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 <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/fb.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/device.h> |
| #include <linux/platform_device.h> |
| #include <linux/uaccess.h> |
| #include <linux/interrupt.h> |
| #include <linux/clk.h> |
| #include <linux/cpufreq.h> |
| #include <linux/console.h> |
| #include <linux/slab.h> |
| #include <video/da8xx-fb.h> |
| |
| #define DRIVER_NAME "da8xx_lcdc" |
| |
| /* LCD Status Register */ |
| #define LCD_END_OF_FRAME1 BIT(9) |
| #define LCD_END_OF_FRAME0 BIT(8) |
| #define LCD_PL_LOAD_DONE BIT(6) |
| #define LCD_FIFO_UNDERFLOW BIT(5) |
| #define LCD_SYNC_LOST BIT(2) |
| |
| /* LCD DMA Control Register */ |
| #define LCD_DMA_BURST_SIZE(x) ((x) << 4) |
| #define LCD_DMA_BURST_1 0x0 |
| #define LCD_DMA_BURST_2 0x1 |
| #define LCD_DMA_BURST_4 0x2 |
| #define LCD_DMA_BURST_8 0x3 |
| #define LCD_DMA_BURST_16 0x4 |
| #define LCD_END_OF_FRAME_INT_ENA BIT(2) |
| #define LCD_DUAL_FRAME_BUFFER_ENABLE BIT(0) |
| |
| /* LCD Control Register */ |
| #define LCD_CLK_DIVISOR(x) ((x) << 8) |
| #define LCD_RASTER_MODE 0x01 |
| |
| /* LCD Raster Control Register */ |
| #define LCD_PALETTE_LOAD_MODE(x) ((x) << 20) |
| #define PALETTE_AND_DATA 0x00 |
| #define PALETTE_ONLY 0x01 |
| #define DATA_ONLY 0x02 |
| |
| #define LCD_MONO_8BIT_MODE BIT(9) |
| #define LCD_RASTER_ORDER BIT(8) |
| #define LCD_TFT_MODE BIT(7) |
| #define LCD_UNDERFLOW_INT_ENA BIT(6) |
| #define LCD_PL_ENABLE BIT(4) |
| #define LCD_MONOCHROME_MODE BIT(1) |
| #define LCD_RASTER_ENABLE BIT(0) |
| #define LCD_TFT_ALT_ENABLE BIT(23) |
| #define LCD_STN_565_ENABLE BIT(24) |
| |
| /* LCD Raster Timing 2 Register */ |
| #define LCD_AC_BIAS_TRANSITIONS_PER_INT(x) ((x) << 16) |
| #define LCD_AC_BIAS_FREQUENCY(x) ((x) << 8) |
| #define LCD_SYNC_CTRL BIT(25) |
| #define LCD_SYNC_EDGE BIT(24) |
| #define LCD_INVERT_PIXEL_CLOCK BIT(22) |
| #define LCD_INVERT_LINE_CLOCK BIT(21) |
| #define LCD_INVERT_FRAME_CLOCK BIT(20) |
| |
| /* LCD Block */ |
| #define LCD_CTRL_REG 0x4 |
| #define LCD_STAT_REG 0x8 |
| #define LCD_RASTER_CTRL_REG 0x28 |
| #define LCD_RASTER_TIMING_0_REG 0x2C |
| #define LCD_RASTER_TIMING_1_REG 0x30 |
| #define LCD_RASTER_TIMING_2_REG 0x34 |
| #define LCD_DMA_CTRL_REG 0x40 |
| #define LCD_DMA_FRM_BUF_BASE_ADDR_0_REG 0x44 |
| #define LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG 0x48 |
| #define LCD_DMA_FRM_BUF_BASE_ADDR_1_REG 0x4C |
| #define LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG 0x50 |
| |
| #define LCD_NUM_BUFFERS 2 |
| |
| #define WSI_TIMEOUT 50 |
| #define PALETTE_SIZE 256 |
| #define LEFT_MARGIN 64 |
| #define RIGHT_MARGIN 64 |
| #define UPPER_MARGIN 32 |
| #define LOWER_MARGIN 32 |
| |
| static resource_size_t da8xx_fb_reg_base; |
| static struct resource *lcdc_regs; |
| |
| static inline unsigned int lcdc_read(unsigned int addr) |
| { |
| return (unsigned int)__raw_readl(da8xx_fb_reg_base + (addr)); |
| } |
| |
| static inline void lcdc_write(unsigned int val, unsigned int addr) |
| { |
| __raw_writel(val, da8xx_fb_reg_base + (addr)); |
| } |
| |
| struct da8xx_fb_par { |
| resource_size_t p_palette_base; |
| unsigned char *v_palette_base; |
| dma_addr_t vram_phys; |
| unsigned long vram_size; |
| void *vram_virt; |
| unsigned int dma_start; |
| unsigned int dma_end; |
| struct clk *lcdc_clk; |
| int irq; |
| unsigned short pseudo_palette[16]; |
| unsigned int palette_sz; |
| unsigned int pxl_clk; |
| int blank; |
| wait_queue_head_t vsync_wait; |
| int vsync_flag; |
| int vsync_timeout; |
| #ifdef CONFIG_CPU_FREQ |
| struct notifier_block freq_transition; |
| #endif |
| void (*panel_power_ctrl)(int); |
| }; |
| |
| /* Variable Screen Information */ |
| static struct fb_var_screeninfo da8xx_fb_var __devinitdata = { |
| .xoffset = 0, |
| .yoffset = 0, |
| .transp = {0, 0, 0}, |
| .nonstd = 0, |
| .activate = 0, |
| .height = -1, |
| .width = -1, |
| .pixclock = 46666, /* 46us - AUO display */ |
| .accel_flags = 0, |
| .left_margin = LEFT_MARGIN, |
| .right_margin = RIGHT_MARGIN, |
| .upper_margin = UPPER_MARGIN, |
| .lower_margin = LOWER_MARGIN, |
| .sync = 0, |
| .vmode = FB_VMODE_NONINTERLACED |
| }; |
| |
| static struct fb_fix_screeninfo da8xx_fb_fix __devinitdata = { |
| .id = "DA8xx FB Drv", |
| .type = FB_TYPE_PACKED_PIXELS, |
| .type_aux = 0, |
| .visual = FB_VISUAL_PSEUDOCOLOR, |
| .xpanstep = 0, |
| .ypanstep = 1, |
| .ywrapstep = 0, |
| .accel = FB_ACCEL_NONE |
| }; |
| |
| struct da8xx_panel { |
| const char name[25]; /* Full name <vendor>_<model> */ |
| unsigned short width; |
| unsigned short height; |
| int hfp; /* Horizontal front porch */ |
| int hbp; /* Horizontal back porch */ |
| int hsw; /* Horizontal Sync Pulse Width */ |
| int vfp; /* Vertical front porch */ |
| int vbp; /* Vertical back porch */ |
| int vsw; /* Vertical Sync Pulse Width */ |
| unsigned int pxl_clk; /* Pixel clock */ |
| unsigned char invert_pxl_clk; /* Invert Pixel clock */ |
| }; |
| |
| static struct da8xx_panel known_lcd_panels[] = { |
| /* Sharp LCD035Q3DG01 */ |
| [0] = { |
| .name = "Sharp_LCD035Q3DG01", |
| .width = 320, |
| .height = 240, |
| .hfp = 8, |
| .hbp = 6, |
| .hsw = 0, |
| .vfp = 2, |
| .vbp = 2, |
| .vsw = 0, |
| .pxl_clk = 4608000, |
| .invert_pxl_clk = 1, |
| }, |
| /* Sharp LK043T1DG01 */ |
| [1] = { |
| .name = "Sharp_LK043T1DG01", |
| .width = 480, |
| .height = 272, |
| .hfp = 2, |
| .hbp = 2, |
| .hsw = 41, |
| .vfp = 2, |
| .vbp = 2, |
| .vsw = 10, |
| .pxl_clk = 7833600, |
| .invert_pxl_clk = 0, |
| }, |
| }; |
| |
| /* Enable the Raster Engine of the LCD Controller */ |
| static inline void lcd_enable_raster(void) |
| { |
| u32 reg; |
| |
| reg = lcdc_read(LCD_RASTER_CTRL_REG); |
| if (!(reg & LCD_RASTER_ENABLE)) |
| lcdc_write(reg | LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG); |
| } |
| |
| /* Disable the Raster Engine of the LCD Controller */ |
| static inline void lcd_disable_raster(void) |
| { |
| u32 reg; |
| |
| reg = lcdc_read(LCD_RASTER_CTRL_REG); |
| if (reg & LCD_RASTER_ENABLE) |
| lcdc_write(reg & ~LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG); |
| } |
| |
| static void lcd_blit(int load_mode, struct da8xx_fb_par *par) |
| { |
| u32 start; |
| u32 end; |
| u32 reg_ras; |
| u32 reg_dma; |
| |
| /* init reg to clear PLM (loading mode) fields */ |
| reg_ras = lcdc_read(LCD_RASTER_CTRL_REG); |
| reg_ras &= ~(3 << 20); |
| |
| reg_dma = lcdc_read(LCD_DMA_CTRL_REG); |
| |
| if (load_mode == LOAD_DATA) { |
| start = par->dma_start; |
| end = par->dma_end; |
| |
| reg_ras |= LCD_PALETTE_LOAD_MODE(DATA_ONLY); |
| reg_dma |= LCD_END_OF_FRAME_INT_ENA; |
| reg_dma |= LCD_DUAL_FRAME_BUFFER_ENABLE; |
| |
| lcdc_write(start, LCD_DMA_FRM_BUF_BASE_ADDR_0_REG); |
| lcdc_write(end, LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG); |
| lcdc_write(start, LCD_DMA_FRM_BUF_BASE_ADDR_1_REG); |
| lcdc_write(end, LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG); |
| } else if (load_mode == LOAD_PALETTE) { |
| start = par->p_palette_base; |
| end = start + par->palette_sz - 1; |
| |
| reg_ras |= LCD_PALETTE_LOAD_MODE(PALETTE_ONLY); |
| reg_ras |= LCD_PL_ENABLE; |
| |
| lcdc_write(start, LCD_DMA_FRM_BUF_BASE_ADDR_0_REG); |
| lcdc_write(end, LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG); |
| } |
| |
| lcdc_write(reg_dma, LCD_DMA_CTRL_REG); |
| lcdc_write(reg_ras, LCD_RASTER_CTRL_REG); |
| |
| /* |
| * The Raster enable bit must be set after all other control fields are |
| * set. |
| */ |
| lcd_enable_raster(); |
| } |
| |
| /* Configure the Burst Size of DMA */ |
| static int lcd_cfg_dma(int burst_size) |
| { |
| u32 reg; |
| |
| reg = lcdc_read(LCD_DMA_CTRL_REG) & 0x00000001; |
| switch (burst_size) { |
| case 1: |
| reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_1); |
| break; |
| case 2: |
| reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_2); |
| break; |
| case 4: |
| reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_4); |
| break; |
| case 8: |
| reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_8); |
| break; |
| case 16: |
| reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_16); |
| break; |
| default: |
| return -EINVAL; |
| } |
| lcdc_write(reg, LCD_DMA_CTRL_REG); |
| |
| return 0; |
| } |
| |
| static void lcd_cfg_ac_bias(int period, int transitions_per_int) |
| { |
| u32 reg; |
| |
| /* Set the AC Bias Period and Number of Transisitons per Interrupt */ |
| reg = lcdc_read(LCD_RASTER_TIMING_2_REG) & 0xFFF00000; |
| reg |= LCD_AC_BIAS_FREQUENCY(period) | |
| LCD_AC_BIAS_TRANSITIONS_PER_INT(transitions_per_int); |
| lcdc_write(reg, LCD_RASTER_TIMING_2_REG); |
| } |
| |
| static void lcd_cfg_horizontal_sync(int back_porch, int pulse_width, |
| int front_porch) |
| { |
| u32 reg; |
| |
| reg = lcdc_read(LCD_RASTER_TIMING_0_REG) & 0xf; |
| reg |= ((back_porch & 0xff) << 24) |
| | ((front_porch & 0xff) << 16) |
| | ((pulse_width & 0x3f) << 10); |
| lcdc_write(reg, LCD_RASTER_TIMING_0_REG); |
| } |
| |
| static void lcd_cfg_vertical_sync(int back_porch, int pulse_width, |
| int front_porch) |
| { |
| u32 reg; |
| |
| reg = lcdc_read(LCD_RASTER_TIMING_1_REG) & 0x3ff; |
| reg |= ((back_porch & 0xff) << 24) |
| | ((front_porch & 0xff) << 16) |
| | ((pulse_width & 0x3f) << 10); |
| lcdc_write(reg, LCD_RASTER_TIMING_1_REG); |
| } |
| |
| static int lcd_cfg_display(const struct lcd_ctrl_config *cfg) |
| { |
| u32 reg; |
| |
| reg = lcdc_read(LCD_RASTER_CTRL_REG) & ~(LCD_TFT_MODE | |
| LCD_MONO_8BIT_MODE | |
| LCD_MONOCHROME_MODE); |
| |
| switch (cfg->p_disp_panel->panel_shade) { |
| case MONOCHROME: |
| reg |= LCD_MONOCHROME_MODE; |
| if (cfg->mono_8bit_mode) |
| reg |= LCD_MONO_8BIT_MODE; |
| break; |
| case COLOR_ACTIVE: |
| reg |= LCD_TFT_MODE; |
| if (cfg->tft_alt_mode) |
| reg |= LCD_TFT_ALT_ENABLE; |
| break; |
| |
| case COLOR_PASSIVE: |
| if (cfg->stn_565_mode) |
| reg |= LCD_STN_565_ENABLE; |
| break; |
| |
| default: |
| return -EINVAL; |
| } |
| |
| /* enable additional interrupts here */ |
| reg |= LCD_UNDERFLOW_INT_ENA; |
| |
| lcdc_write(reg, LCD_RASTER_CTRL_REG); |
| |
| reg = lcdc_read(LCD_RASTER_TIMING_2_REG); |
| |
| if (cfg->sync_ctrl) |
| reg |= LCD_SYNC_CTRL; |
| else |
| reg &= ~LCD_SYNC_CTRL; |
| |
| if (cfg->sync_edge) |
| reg |= LCD_SYNC_EDGE; |
| else |
| reg &= ~LCD_SYNC_EDGE; |
| |
| if (cfg->invert_line_clock) |
| reg |= LCD_INVERT_LINE_CLOCK; |
| else |
| reg &= ~LCD_INVERT_LINE_CLOCK; |
| |
| if (cfg->invert_frm_clock) |
| reg |= LCD_INVERT_FRAME_CLOCK; |
| else |
| reg &= ~LCD_INVERT_FRAME_CLOCK; |
| |
| lcdc_write(reg, LCD_RASTER_TIMING_2_REG); |
| |
| return 0; |
| } |
| |
| static int lcd_cfg_frame_buffer(struct da8xx_fb_par *par, u32 width, u32 height, |
| u32 bpp, u32 raster_order) |
| { |
| u32 reg; |
| |
| /* Set the Panel Width */ |
| /* Pixels per line = (PPL + 1)*16 */ |
| /*0x3F in bits 4..9 gives max horisontal resolution = 1024 pixels*/ |
| width &= 0x3f0; |
| reg = lcdc_read(LCD_RASTER_TIMING_0_REG); |
| reg &= 0xfffffc00; |
| reg |= ((width >> 4) - 1) << 4; |
| lcdc_write(reg, LCD_RASTER_TIMING_0_REG); |
| |
| /* Set the Panel Height */ |
| reg = lcdc_read(LCD_RASTER_TIMING_1_REG); |
| reg = ((height - 1) & 0x3ff) | (reg & 0xfffffc00); |
| lcdc_write(reg, LCD_RASTER_TIMING_1_REG); |
| |
| /* Set the Raster Order of the Frame Buffer */ |
| reg = lcdc_read(LCD_RASTER_CTRL_REG) & ~(1 << 8); |
| if (raster_order) |
| reg |= LCD_RASTER_ORDER; |
| lcdc_write(reg, LCD_RASTER_CTRL_REG); |
| |
| switch (bpp) { |
| case 1: |
| case 2: |
| case 4: |
| case 16: |
| par->palette_sz = 16 * 2; |
| break; |
| |
| case 8: |
| par->palette_sz = 256 * 2; |
| break; |
| |
| default: |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static int fb_setcolreg(unsigned regno, unsigned red, unsigned green, |
| unsigned blue, unsigned transp, |
| struct fb_info *info) |
| { |
| struct da8xx_fb_par *par = info->par; |
| unsigned short *palette = (unsigned short *) par->v_palette_base; |
| u_short pal; |
| int update_hw = 0; |
| |
| if (regno > 255) |
| return 1; |
| |
| if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) |
| return 1; |
| |
| if (info->var.bits_per_pixel == 8) { |
| red >>= 4; |
| green >>= 8; |
| blue >>= 12; |
| |
| pal = (red & 0x0f00); |
| pal |= (green & 0x00f0); |
| pal |= (blue & 0x000f); |
| |
| if (palette[regno] != pal) { |
| update_hw = 1; |
| palette[regno] = pal; |
| } |
| } else if ((info->var.bits_per_pixel == 16) && regno < 16) { |
| red >>= (16 - info->var.red.length); |
| red <<= info->var.red.offset; |
| |
| green >>= (16 - info->var.green.length); |
| green <<= info->var.green.offset; |
| |
| blue >>= (16 - info->var.blue.length); |
| blue <<= info->var.blue.offset; |
| |
| par->pseudo_palette[regno] = red | green | blue; |
| |
| if (palette[0] != 0x4000) { |
| update_hw = 1; |
| palette[0] = 0x4000; |
| } |
| } |
| |
| /* Update the palette in the h/w as needed. */ |
| if (update_hw) |
| lcd_blit(LOAD_PALETTE, par); |
| |
| return 0; |
| } |
| |
| static void lcd_reset(struct da8xx_fb_par *par) |
| { |
| /* Disable the Raster if previously Enabled */ |
| lcd_disable_raster(); |
| |
| /* DMA has to be disabled */ |
| lcdc_write(0, LCD_DMA_CTRL_REG); |
| lcdc_write(0, LCD_RASTER_CTRL_REG); |
| } |
| |
| static void lcd_calc_clk_divider(struct da8xx_fb_par *par) |
| { |
| unsigned int lcd_clk, div; |
| |
| lcd_clk = clk_get_rate(par->lcdc_clk); |
| div = lcd_clk / par->pxl_clk; |
| |
| /* Configure the LCD clock divisor. */ |
| lcdc_write(LCD_CLK_DIVISOR(div) | |
| (LCD_RASTER_MODE & 0x1), LCD_CTRL_REG); |
| } |
| |
| static int lcd_init(struct da8xx_fb_par *par, const struct lcd_ctrl_config *cfg, |
| struct da8xx_panel *panel) |
| { |
| u32 bpp; |
| int ret = 0; |
| |
| lcd_reset(par); |
| |
| /* Calculate the divider */ |
| lcd_calc_clk_divider(par); |
| |
| if (panel->invert_pxl_clk) |
| lcdc_write((lcdc_read(LCD_RASTER_TIMING_2_REG) | |
| LCD_INVERT_PIXEL_CLOCK), LCD_RASTER_TIMING_2_REG); |
| else |
| lcdc_write((lcdc_read(LCD_RASTER_TIMING_2_REG) & |
| ~LCD_INVERT_PIXEL_CLOCK), LCD_RASTER_TIMING_2_REG); |
| |
| /* Configure the DMA burst size. */ |
| ret = lcd_cfg_dma(cfg->dma_burst_sz); |
| if (ret < 0) |
| return ret; |
| |
| /* Configure the AC bias properties. */ |
| lcd_cfg_ac_bias(cfg->ac_bias, cfg->ac_bias_intrpt); |
| |
| /* Configure the vertical and horizontal sync properties. */ |
| lcd_cfg_vertical_sync(panel->vbp, panel->vsw, panel->vfp); |
| lcd_cfg_horizontal_sync(panel->hbp, panel->hsw, panel->hfp); |
| |
| /* Configure for disply */ |
| ret = lcd_cfg_display(cfg); |
| if (ret < 0) |
| return ret; |
| |
| if (QVGA != cfg->p_disp_panel->panel_type) |
| return -EINVAL; |
| |
| if (cfg->bpp <= cfg->p_disp_panel->max_bpp && |
| cfg->bpp >= cfg->p_disp_panel->min_bpp) |
| bpp = cfg->bpp; |
| else |
| bpp = cfg->p_disp_panel->max_bpp; |
| if (bpp == 12) |
| bpp = 16; |
| ret = lcd_cfg_frame_buffer(par, (unsigned int)panel->width, |
| (unsigned int)panel->height, bpp, |
| cfg->raster_order); |
| if (ret < 0) |
| return ret; |
| |
| /* Configure FDD */ |
| lcdc_write((lcdc_read(LCD_RASTER_CTRL_REG) & 0xfff00fff) | |
| (cfg->fdd << 12), LCD_RASTER_CTRL_REG); |
| |
| return 0; |
| } |
| |
| static irqreturn_t lcdc_irq_handler(int irq, void *arg) |
| { |
| struct da8xx_fb_par *par = arg; |
| u32 stat = lcdc_read(LCD_STAT_REG); |
| u32 reg_ras; |
| |
| if ((stat & LCD_SYNC_LOST) && (stat & LCD_FIFO_UNDERFLOW)) { |
| lcd_disable_raster(); |
| lcdc_write(stat, LCD_STAT_REG); |
| lcd_enable_raster(); |
| } else if (stat & LCD_PL_LOAD_DONE) { |
| /* |
| * Must disable raster before changing state of any control bit. |
| * And also must be disabled before clearing the PL loading |
| * interrupt via the following write to the status register. If |
| * this is done after then one gets multiple PL done interrupts. |
| */ |
| lcd_disable_raster(); |
| |
| lcdc_write(stat, LCD_STAT_REG); |
| |
| /* Disable PL completion inerrupt */ |
| reg_ras = lcdc_read(LCD_RASTER_CTRL_REG); |
| reg_ras &= ~LCD_PL_ENABLE; |
| lcdc_write(reg_ras, LCD_RASTER_CTRL_REG); |
| |
| /* Setup and start data loading mode */ |
| lcd_blit(LOAD_DATA, par); |
| } else { |
| lcdc_write(stat, LCD_STAT_REG); |
| |
| if (stat & LCD_END_OF_FRAME0) { |
| lcdc_write(par->dma_start, |
| LCD_DMA_FRM_BUF_BASE_ADDR_0_REG); |
| lcdc_write(par->dma_end, |
| LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG); |
| par->vsync_flag = 1; |
| wake_up_interruptible(&par->vsync_wait); |
| } |
| |
| if (stat & LCD_END_OF_FRAME1) { |
| lcdc_write(par->dma_start, |
| LCD_DMA_FRM_BUF_BASE_ADDR_1_REG); |
| lcdc_write(par->dma_end, |
| LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG); |
| par->vsync_flag = 1; |
| wake_up_interruptible(&par->vsync_wait); |
| } |
| } |
| |
| return IRQ_HANDLED; |
| } |
| |
| static int fb_check_var(struct fb_var_screeninfo *var, |
| struct fb_info *info) |
| { |
| int err = 0; |
| |
| switch (var->bits_per_pixel) { |
| case 1: |
| case 8: |
| var->red.offset = 0; |
| var->red.length = 8; |
| var->green.offset = 0; |
| var->green.length = 8; |
| var->blue.offset = 0; |
| var->blue.length = 8; |
| var->transp.offset = 0; |
| var->transp.length = 0; |
| break; |
| case 4: |
| var->red.offset = 0; |
| var->red.length = 4; |
| var->green.offset = 0; |
| var->green.length = 4; |
| var->blue.offset = 0; |
| var->blue.length = 4; |
| var->transp.offset = 0; |
| var->transp.length = 0; |
| break; |
| case 16: /* RGB 565 */ |
| var->red.offset = 11; |
| var->red.length = 5; |
| var->green.offset = 5; |
| var->green.length = 6; |
| var->blue.offset = 0; |
| var->blue.length = 5; |
| var->transp.offset = 0; |
| var->transp.length = 0; |
| break; |
| default: |
| err = -EINVAL; |
| } |
| |
| var->red.msb_right = 0; |
| var->green.msb_right = 0; |
| var->blue.msb_right = 0; |
| var->transp.msb_right = 0; |
| return err; |
| } |
| |
| #ifdef CONFIG_CPU_FREQ |
| static int lcd_da8xx_cpufreq_transition(struct notifier_block *nb, |
| unsigned long val, void *data) |
| { |
| struct da8xx_fb_par *par; |
| |
| par = container_of(nb, struct da8xx_fb_par, freq_transition); |
| if (val == CPUFREQ_PRECHANGE) { |
| lcd_disable_raster(); |
| } else if (val == CPUFREQ_POSTCHANGE) { |
| lcd_calc_clk_divider(par); |
| lcd_enable_raster(); |
| } |
| |
| return 0; |
| } |
| |
| static inline int lcd_da8xx_cpufreq_register(struct da8xx_fb_par *par) |
| { |
| par->freq_transition.notifier_call = lcd_da8xx_cpufreq_transition; |
| |
| return cpufreq_register_notifier(&par->freq_transition, |
| CPUFREQ_TRANSITION_NOTIFIER); |
| } |
| |
| static inline void lcd_da8xx_cpufreq_deregister(struct da8xx_fb_par *par) |
| { |
| cpufreq_unregister_notifier(&par->freq_transition, |
| CPUFREQ_TRANSITION_NOTIFIER); |
| } |
| #endif |
| |
| static int __devexit fb_remove(struct platform_device *dev) |
| { |
| struct fb_info *info = dev_get_drvdata(&dev->dev); |
| |
| if (info) { |
| struct da8xx_fb_par *par = info->par; |
| |
| #ifdef CONFIG_CPU_FREQ |
| lcd_da8xx_cpufreq_deregister(par); |
| #endif |
| if (par->panel_power_ctrl) |
| par->panel_power_ctrl(0); |
| |
| lcd_disable_raster(); |
| lcdc_write(0, LCD_RASTER_CTRL_REG); |
| |
| /* disable DMA */ |
| lcdc_write(0, LCD_DMA_CTRL_REG); |
| |
| unregister_framebuffer(info); |
| fb_dealloc_cmap(&info->cmap); |
| dma_free_coherent(NULL, PALETTE_SIZE, par->v_palette_base, |
| par->p_palette_base); |
| dma_free_coherent(NULL, par->vram_size, par->vram_virt, |
| par->vram_phys); |
| free_irq(par->irq, par); |
| clk_disable(par->lcdc_clk); |
| clk_put(par->lcdc_clk); |
| framebuffer_release(info); |
| iounmap((void __iomem *)da8xx_fb_reg_base); |
| release_mem_region(lcdc_regs->start, resource_size(lcdc_regs)); |
| |
| } |
| return 0; |
| } |
| |
| /* |
| * Function to wait for vertical sync which for this LCD peripheral |
| * translates into waiting for the current raster frame to complete. |
| */ |
| static int fb_wait_for_vsync(struct fb_info *info) |
| { |
| struct da8xx_fb_par *par = info->par; |
| int ret; |
| |
| /* |
| * Set flag to 0 and wait for isr to set to 1. It would seem there is a |
| * race condition here where the ISR could have occurred just before or |
| * just after this set. But since we are just coarsely waiting for |
| * a frame to complete then that's OK. i.e. if the frame completed |
| * just before this code executed then we have to wait another full |
| * frame time but there is no way to avoid such a situation. On the |
| * other hand if the frame completed just after then we don't need |
| * to wait long at all. Either way we are guaranteed to return to the |
| * user immediately after a frame completion which is all that is |
| * required. |
| */ |
| par->vsync_flag = 0; |
| ret = wait_event_interruptible_timeout(par->vsync_wait, |
| par->vsync_flag != 0, |
| par->vsync_timeout); |
| if (ret < 0) |
| return ret; |
| if (ret == 0) |
| return -ETIMEDOUT; |
| |
| return 0; |
| } |
| |
| static int fb_ioctl(struct fb_info *info, unsigned int cmd, |
| unsigned long arg) |
| { |
| struct lcd_sync_arg sync_arg; |
| |
| switch (cmd) { |
| case FBIOGET_CONTRAST: |
| case FBIOPUT_CONTRAST: |
| case FBIGET_BRIGHTNESS: |
| case FBIPUT_BRIGHTNESS: |
| case FBIGET_COLOR: |
| case FBIPUT_COLOR: |
| return -ENOTTY; |
| case FBIPUT_HSYNC: |
| if (copy_from_user(&sync_arg, (char *)arg, |
| sizeof(struct lcd_sync_arg))) |
| return -EFAULT; |
| lcd_cfg_horizontal_sync(sync_arg.back_porch, |
| sync_arg.pulse_width, |
| sync_arg.front_porch); |
| break; |
| case FBIPUT_VSYNC: |
| if (copy_from_user(&sync_arg, (char *)arg, |
| sizeof(struct lcd_sync_arg))) |
| return -EFAULT; |
| lcd_cfg_vertical_sync(sync_arg.back_porch, |
| sync_arg.pulse_width, |
| sync_arg.front_porch); |
| break; |
| case FBIO_WAITFORVSYNC: |
| return fb_wait_for_vsync(info); |
| default: |
| return -EINVAL; |
| } |
| return 0; |
| } |
| |
| static int cfb_blank(int blank, struct fb_info *info) |
| { |
| struct da8xx_fb_par *par = info->par; |
| int ret = 0; |
| |
| if (par->blank == blank) |
| return 0; |
| |
| par->blank = blank; |
| switch (blank) { |
| case FB_BLANK_UNBLANK: |
| if (par->panel_power_ctrl) |
| par->panel_power_ctrl(1); |
| |
| lcd_enable_raster(); |
| break; |
| case FB_BLANK_POWERDOWN: |
| if (par->panel_power_ctrl) |
| par->panel_power_ctrl(0); |
| |
| lcd_disable_raster(); |
| break; |
| default: |
| ret = -EINVAL; |
| } |
| |
| return ret; |
| } |
| |
| /* |
| * Set new x,y offsets in the virtual display for the visible area and switch |
| * to the new mode. |
| */ |
| static int da8xx_pan_display(struct fb_var_screeninfo *var, |
| struct fb_info *fbi) |
| { |
| int ret = 0; |
| struct fb_var_screeninfo new_var; |
| struct da8xx_fb_par *par = fbi->par; |
| struct fb_fix_screeninfo *fix = &fbi->fix; |
| unsigned int end; |
| unsigned int start; |
| |
| if (var->xoffset != fbi->var.xoffset || |
| var->yoffset != fbi->var.yoffset) { |
| memcpy(&new_var, &fbi->var, sizeof(new_var)); |
| new_var.xoffset = var->xoffset; |
| new_var.yoffset = var->yoffset; |
| if (fb_check_var(&new_var, fbi)) |
| ret = -EINVAL; |
| else { |
| memcpy(&fbi->var, &new_var, sizeof(new_var)); |
| |
| start = fix->smem_start + |
| new_var.yoffset * fix->line_length + |
| new_var.xoffset * var->bits_per_pixel / 8; |
| end = start + var->yres * fix->line_length - 1; |
| par->dma_start = start; |
| par->dma_end = end; |
| } |
| } |
| |
| return ret; |
| } |
| |
| static struct fb_ops da8xx_fb_ops = { |
| .owner = THIS_MODULE, |
| .fb_check_var = fb_check_var, |
| .fb_setcolreg = fb_setcolreg, |
| .fb_pan_display = da8xx_pan_display, |
| .fb_ioctl = fb_ioctl, |
| .fb_fillrect = cfb_fillrect, |
| .fb_copyarea = cfb_copyarea, |
| .fb_imageblit = cfb_imageblit, |
| .fb_blank = cfb_blank, |
| }; |
| |
| static int __init fb_probe(struct platform_device *device) |
| { |
| struct da8xx_lcdc_platform_data *fb_pdata = |
| device->dev.platform_data; |
| struct lcd_ctrl_config *lcd_cfg; |
| struct da8xx_panel *lcdc_info; |
| struct fb_info *da8xx_fb_info; |
| struct clk *fb_clk = NULL; |
| struct da8xx_fb_par *par; |
| resource_size_t len; |
| int ret, i; |
| |
| if (fb_pdata == NULL) { |
| dev_err(&device->dev, "Can not get platform data\n"); |
| return -ENOENT; |
| } |
| |
| lcdc_regs = platform_get_resource(device, IORESOURCE_MEM, 0); |
| if (!lcdc_regs) { |
| dev_err(&device->dev, |
| "Can not get memory resource for LCD controller\n"); |
| return -ENOENT; |
| } |
| |
| len = resource_size(lcdc_regs); |
| |
| lcdc_regs = request_mem_region(lcdc_regs->start, len, lcdc_regs->name); |
| if (!lcdc_regs) |
| return -EBUSY; |
| |
| da8xx_fb_reg_base = (resource_size_t)ioremap(lcdc_regs->start, len); |
| if (!da8xx_fb_reg_base) { |
| ret = -EBUSY; |
| goto err_request_mem; |
| } |
| |
| fb_clk = clk_get(&device->dev, NULL); |
| if (IS_ERR(fb_clk)) { |
| dev_err(&device->dev, "Can not get device clock\n"); |
| ret = -ENODEV; |
| goto err_ioremap; |
| } |
| ret = clk_enable(fb_clk); |
| if (ret) |
| goto err_clk_put; |
| |
| for (i = 0, lcdc_info = known_lcd_panels; |
| i < ARRAY_SIZE(known_lcd_panels); |
| i++, lcdc_info++) { |
| if (strcmp(fb_pdata->type, lcdc_info->name) == 0) |
| break; |
| } |
| |
| if (i == ARRAY_SIZE(known_lcd_panels)) { |
| dev_err(&device->dev, "GLCD: No valid panel found\n"); |
| ret = -ENODEV; |
| goto err_clk_disable; |
| } else |
| dev_info(&device->dev, "GLCD: Found %s panel\n", |
| fb_pdata->type); |
| |
| lcd_cfg = (struct lcd_ctrl_config *)fb_pdata->controller_data; |
| |
| da8xx_fb_info = framebuffer_alloc(sizeof(struct da8xx_fb_par), |
| &device->dev); |
| if (!da8xx_fb_info) { |
| dev_dbg(&device->dev, "Memory allocation failed for fb_info\n"); |
| ret = -ENOMEM; |
| goto err_clk_disable; |
| } |
| |
| par = da8xx_fb_info->par; |
| par->lcdc_clk = fb_clk; |
| par->pxl_clk = lcdc_info->pxl_clk; |
| if (fb_pdata->panel_power_ctrl) { |
| par->panel_power_ctrl = fb_pdata->panel_power_ctrl; |
| par->panel_power_ctrl(1); |
| } |
| |
| if (lcd_init(par, lcd_cfg, lcdc_info) < 0) { |
| dev_err(&device->dev, "lcd_init failed\n"); |
| ret = -EFAULT; |
| goto err_release_fb; |
| } |
| |
| /* allocate frame buffer */ |
| par->vram_size = lcdc_info->width * lcdc_info->height * lcd_cfg->bpp; |
| par->vram_size = PAGE_ALIGN(par->vram_size/8); |
| par->vram_size = par->vram_size * LCD_NUM_BUFFERS; |
| |
| par->vram_virt = dma_alloc_coherent(NULL, |
| par->vram_size, |
| (resource_size_t *) &par->vram_phys, |
| GFP_KERNEL | GFP_DMA); |
| if (!par->vram_virt) { |
| dev_err(&device->dev, |
| "GLCD: kmalloc for frame buffer failed\n"); |
| ret = -EINVAL; |
| goto err_release_fb; |
| } |
| |
| da8xx_fb_info->screen_base = (char __iomem *) par->vram_virt; |
| da8xx_fb_fix.smem_start = par->vram_phys; |
| da8xx_fb_fix.smem_len = par->vram_size; |
| da8xx_fb_fix.line_length = (lcdc_info->width * lcd_cfg->bpp) / 8; |
| |
| par->dma_start = par->vram_phys; |
| par->dma_end = par->dma_start + lcdc_info->height * |
| da8xx_fb_fix.line_length - 1; |
| |
| /* allocate palette buffer */ |
| par->v_palette_base = dma_alloc_coherent(NULL, |
| PALETTE_SIZE, |
| (resource_size_t *) |
| &par->p_palette_base, |
| GFP_KERNEL | GFP_DMA); |
| if (!par->v_palette_base) { |
| dev_err(&device->dev, |
| "GLCD: kmalloc for palette buffer failed\n"); |
| ret = -EINVAL; |
| goto err_release_fb_mem; |
| } |
| memset(par->v_palette_base, 0, PALETTE_SIZE); |
| |
| par->irq = platform_get_irq(device, 0); |
| if (par->irq < 0) { |
| ret = -ENOENT; |
| goto err_release_pl_mem; |
| } |
| |
| /* Initialize par */ |
| da8xx_fb_info->var.bits_per_pixel = lcd_cfg->bpp; |
| |
| da8xx_fb_var.xres = lcdc_info->width; |
| da8xx_fb_var.xres_virtual = lcdc_info->width; |
| |
| da8xx_fb_var.yres = lcdc_info->height; |
| da8xx_fb_var.yres_virtual = lcdc_info->height * LCD_NUM_BUFFERS; |
| |
| da8xx_fb_var.grayscale = |
| lcd_cfg->p_disp_panel->panel_shade == MONOCHROME ? 1 : 0; |
| da8xx_fb_var.bits_per_pixel = lcd_cfg->bpp; |
| |
| da8xx_fb_var.hsync_len = lcdc_info->hsw; |
| da8xx_fb_var.vsync_len = lcdc_info->vsw; |
| |
| /* Initialize fbinfo */ |
| da8xx_fb_info->flags = FBINFO_FLAG_DEFAULT; |
| da8xx_fb_info->fix = da8xx_fb_fix; |
| da8xx_fb_info->var = da8xx_fb_var; |
| da8xx_fb_info->fbops = &da8xx_fb_ops; |
| da8xx_fb_info->pseudo_palette = par->pseudo_palette; |
| da8xx_fb_info->fix.visual = (da8xx_fb_info->var.bits_per_pixel <= 8) ? |
| FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR; |
| |
| ret = fb_alloc_cmap(&da8xx_fb_info->cmap, PALETTE_SIZE, 0); |
| if (ret) |
| goto err_release_pl_mem; |
| da8xx_fb_info->cmap.len = par->palette_sz; |
| |
| /* initialize var_screeninfo */ |
| da8xx_fb_var.activate = FB_ACTIVATE_FORCE; |
| fb_set_var(da8xx_fb_info, &da8xx_fb_var); |
| |
| dev_set_drvdata(&device->dev, da8xx_fb_info); |
| |
| /* initialize the vsync wait queue */ |
| init_waitqueue_head(&par->vsync_wait); |
| par->vsync_timeout = HZ / 5; |
| |
| /* Register the Frame Buffer */ |
| if (register_framebuffer(da8xx_fb_info) < 0) { |
| dev_err(&device->dev, |
| "GLCD: Frame Buffer Registration Failed!\n"); |
| ret = -EINVAL; |
| goto err_dealloc_cmap; |
| } |
| |
| #ifdef CONFIG_CPU_FREQ |
| ret = lcd_da8xx_cpufreq_register(par); |
| if (ret) { |
| dev_err(&device->dev, "failed to register cpufreq\n"); |
| goto err_cpu_freq; |
| } |
| #endif |
| |
| ret = request_irq(par->irq, lcdc_irq_handler, 0, DRIVER_NAME, par); |
| if (ret) |
| goto irq_freq; |
| return 0; |
| |
| irq_freq: |
| #ifdef CONFIG_CPU_FREQ |
| lcd_da8xx_cpufreq_deregister(par); |
| #endif |
| err_cpu_freq: |
| unregister_framebuffer(da8xx_fb_info); |
| |
| err_dealloc_cmap: |
| fb_dealloc_cmap(&da8xx_fb_info->cmap); |
| |
| err_release_pl_mem: |
| dma_free_coherent(NULL, PALETTE_SIZE, par->v_palette_base, |
| par->p_palette_base); |
| |
| err_release_fb_mem: |
| dma_free_coherent(NULL, par->vram_size, par->vram_virt, par->vram_phys); |
| |
| err_release_fb: |
| framebuffer_release(da8xx_fb_info); |
| |
| err_clk_disable: |
| clk_disable(fb_clk); |
| |
| err_clk_put: |
| clk_put(fb_clk); |
| |
| err_ioremap: |
| iounmap((void __iomem *)da8xx_fb_reg_base); |
| |
| err_request_mem: |
| release_mem_region(lcdc_regs->start, len); |
| |
| return ret; |
| } |
| |
| #ifdef CONFIG_PM |
| static int fb_suspend(struct platform_device *dev, pm_message_t state) |
| { |
| struct fb_info *info = platform_get_drvdata(dev); |
| struct da8xx_fb_par *par = info->par; |
| |
| console_lock(); |
| if (par->panel_power_ctrl) |
| par->panel_power_ctrl(0); |
| |
| fb_set_suspend(info, 1); |
| lcd_disable_raster(); |
| clk_disable(par->lcdc_clk); |
| console_unlock(); |
| |
| return 0; |
| } |
| static int fb_resume(struct platform_device *dev) |
| { |
| struct fb_info *info = platform_get_drvdata(dev); |
| struct da8xx_fb_par *par = info->par; |
| |
| console_lock(); |
| if (par->panel_power_ctrl) |
| par->panel_power_ctrl(1); |
| |
| clk_enable(par->lcdc_clk); |
| lcd_enable_raster(); |
| fb_set_suspend(info, 0); |
| console_unlock(); |
| |
| return 0; |
| } |
| #else |
| #define fb_suspend NULL |
| #define fb_resume NULL |
| #endif |
| |
| static struct platform_driver da8xx_fb_driver = { |
| .probe = fb_probe, |
| .remove = fb_remove, |
| .suspend = fb_suspend, |
| .resume = fb_resume, |
| .driver = { |
| .name = DRIVER_NAME, |
| .owner = THIS_MODULE, |
| }, |
| }; |
| |
| static int __init da8xx_fb_init(void) |
| { |
| return platform_driver_register(&da8xx_fb_driver); |
| } |
| |
| static void __exit da8xx_fb_cleanup(void) |
| { |
| platform_driver_unregister(&da8xx_fb_driver); |
| } |
| |
| module_init(da8xx_fb_init); |
| module_exit(da8xx_fb_cleanup); |
| |
| MODULE_DESCRIPTION("Framebuffer driver for TI da8xx/omap-l1xx"); |
| MODULE_AUTHOR("Texas Instruments"); |
| MODULE_LICENSE("GPL"); |