diff options
| -rw-r--r-- | drivers/video/da8xx-fb.c | 151 |
1 files changed, 142 insertions, 9 deletions
diff --git a/drivers/video/da8xx-fb.c b/drivers/video/da8xx-fb.c index 8d4e4eb..217c05f 100644 --- a/drivers/video/da8xx-fb.c +++ b/drivers/video/da8xx-fb.c @@ -35,6 +35,9 @@ #define DRIVER_NAME "da8xx_lcdc" +#define LCD_VERSION_1 1 +#define LCD_VERSION_2 2 + /* LCD Status Register */ #define LCD_END_OF_FRAME1 BIT(9) #define LCD_END_OF_FRAME0 BIT(8) @@ -49,7 +52,9 @@ #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_V1_END_OF_FRAME_INT_ENA BIT(2) +#define LCD_V2_END_OF_FRAME0_INT_ENA BIT(8) +#define LCD_V2_END_OF_FRAME1_INT_ENA BIT(9) #define LCD_DUAL_FRAME_BUFFER_ENABLE BIT(0) /* LCD Control Register */ @@ -65,12 +70,18 @@ #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_V1_UNDERFLOW_INT_ENA BIT(6) +#define LCD_V2_UNDERFLOW_INT_ENA BIT(5) +#define LCD_V1_PL_INT_ENA BIT(4) +#define LCD_V2_PL_INT_ENA BIT(6) #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) +#define LCD_V2_DMA_CLK_EN BIT(2) +#define LCD_V2_LIDD_CLK_EN BIT(1) +#define LCD_V2_CORE_CLK_EN BIT(0) +#define LCD_V2_LPP_B10 26 /* LCD Raster Timing 2 Register */ #define LCD_AC_BIAS_TRANSITIONS_PER_INT(x) ((x) << 16) @@ -82,6 +93,7 @@ #define LCD_INVERT_FRAME_CLOCK BIT(20) /* LCD Block */ +#define LCD_PID_REG 0x0 #define LCD_CTRL_REG 0x4 #define LCD_STAT_REG 0x8 #define LCD_RASTER_CTRL_REG 0x28 @@ -94,6 +106,17 @@ #define LCD_DMA_FRM_BUF_BASE_ADDR_1_REG 0x4C #define LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG 0x50 +/* Interrupt Registers available only in Version 2 */ +#define LCD_RAW_STAT_REG 0x58 +#define LCD_MASKED_STAT_REG 0x5c +#define LCD_INT_ENABLE_SET_REG 0x60 +#define LCD_INT_ENABLE_CLR_REG 0x64 +#define LCD_END_OF_INT_IND_REG 0x68 + +/* Clock registers available only on Version 2 */ +#define LCD_CLK_ENABLE_REG 0x6c +#define LCD_CLK_RESET_REG 0x70 + #define LCD_NUM_BUFFERS 2 #define WSI_TIMEOUT 50 @@ -105,6 +128,8 @@ static resource_size_t da8xx_fb_reg_base; static struct resource *lcdc_regs; +static unsigned int lcd_revision; +static irq_handler_t lcdc_irq_handler; static inline unsigned int lcdc_read(unsigned int addr) { @@ -240,6 +265,7 @@ static void lcd_blit(int load_mode, struct da8xx_fb_par *par) u32 end; u32 reg_ras; u32 reg_dma; + u32 reg_int; /* init reg to clear PLM (loading mode) fields */ reg_ras = lcdc_read(LCD_RASTER_CTRL_REG); @@ -252,7 +278,14 @@ static void lcd_blit(int load_mode, struct da8xx_fb_par *par) end = par->dma_end; reg_ras |= LCD_PALETTE_LOAD_MODE(DATA_ONLY); - reg_dma |= LCD_END_OF_FRAME_INT_ENA; + if (lcd_revision == LCD_VERSION_1) { + reg_dma |= LCD_V1_END_OF_FRAME_INT_ENA; + } else { + reg_int = lcdc_read(LCD_INT_ENABLE_SET_REG) | + LCD_V2_END_OF_FRAME0_INT_ENA | + LCD_V2_END_OF_FRAME1_INT_ENA; + lcdc_write(reg_int, LCD_INT_ENABLE_SET_REG); + } reg_dma |= LCD_DUAL_FRAME_BUFFER_ENABLE; lcdc_write(start, LCD_DMA_FRM_BUF_BASE_ADDR_0_REG); @@ -264,7 +297,14 @@ static void lcd_blit(int load_mode, struct da8xx_fb_par *par) end = start + par->palette_sz - 1; reg_ras |= LCD_PALETTE_LOAD_MODE(PALETTE_ONLY); - reg_ras |= LCD_PL_ENABLE; + + if (lcd_revision == LCD_VERSION_1) { + reg_ras |= LCD_V1_PL_INT_ENA; + } else { + reg_int = lcdc_read(LCD_INT_ENABLE_SET_REG) | + LCD_V2_PL_INT_ENA; + lcdc_write(reg_int, LCD_INT_ENABLE_SET_REG); + } lcdc_write(start, LCD_DMA_FRM_BUF_BASE_ADDR_0_REG); lcdc_write(end, LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG); @@ -348,6 +388,7 @@ static void lcd_cfg_vertical_sync(int back_porch, int pulse_width, static int lcd_cfg_display(const struct lcd_ctrl_config *cfg) { u32 reg; + u32 reg_int; reg = lcdc_read(LCD_RASTER_CTRL_REG) & ~(LCD_TFT_MODE | LCD_MONO_8BIT_MODE | @@ -375,7 +416,13 @@ static int lcd_cfg_display(const struct lcd_ctrl_config *cfg) } /* enable additional interrupts here */ - reg |= LCD_UNDERFLOW_INT_ENA; + if (lcd_revision == LCD_VERSION_1) { + reg |= LCD_V1_UNDERFLOW_INT_ENA; + } else { + reg_int = lcdc_read(LCD_INT_ENABLE_SET_REG) | + LCD_V2_UNDERFLOW_INT_ENA; + lcdc_write(reg_int, LCD_INT_ENABLE_SET_REG); + } lcdc_write(reg, LCD_RASTER_CTRL_REG); @@ -511,6 +558,9 @@ static void lcd_reset(struct da8xx_fb_par *par) /* DMA has to be disabled */ lcdc_write(0, LCD_DMA_CTRL_REG); lcdc_write(0, LCD_RASTER_CTRL_REG); + + if (lcd_revision == LCD_VERSION_2) + lcdc_write(0, LCD_INT_ENABLE_SET_REG); } static void lcd_calc_clk_divider(struct da8xx_fb_par *par) @@ -523,6 +573,11 @@ static void lcd_calc_clk_divider(struct da8xx_fb_par *par) /* Configure the LCD clock divisor. */ lcdc_write(LCD_CLK_DIVISOR(div) | (LCD_RASTER_MODE & 0x1), LCD_CTRL_REG); + + if (lcd_revision == LCD_VERSION_2) + lcdc_write(LCD_V2_DMA_CLK_EN | LCD_V2_LIDD_CLK_EN | + LCD_V2_CORE_CLK_EN, LCD_CLK_ENABLE_REG); + } static int lcd_init(struct da8xx_fb_par *par, const struct lcd_ctrl_config *cfg, @@ -583,7 +638,63 @@ static int lcd_init(struct da8xx_fb_par *par, const struct lcd_ctrl_config *cfg, return 0; } -static irqreturn_t lcdc_irq_handler(int irq, void *arg) +/* IRQ handler for version 2 of LCDC */ +static irqreturn_t lcdc_irq_handler_rev02(int irq, void *arg) +{ + struct da8xx_fb_par *par = arg; + u32 stat = lcdc_read(LCD_MASKED_STAT_REG); + u32 reg_int; + + if ((stat & LCD_SYNC_LOST) && (stat & LCD_FIFO_UNDERFLOW)) { + lcd_disable_raster(); + lcdc_write(stat, LCD_MASKED_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_MASKED_STAT_REG); + + /* Disable PL completion inerrupt */ + reg_int = lcdc_read(LCD_INT_ENABLE_CLR_REG) | + (LCD_V2_PL_INT_ENA); + lcdc_write(reg_int, LCD_INT_ENABLE_CLR_REG); + + /* Setup and start data loading mode */ + lcd_blit(LOAD_DATA, par); + } else { + lcdc_write(stat, LCD_MASKED_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); + } + } + + lcdc_write(0, LCD_END_OF_INT_IND_REG); + return IRQ_HANDLED; +} + +/* IRQ handler for version 1 LCDC */ +static irqreturn_t lcdc_irq_handler_rev01(int irq, void *arg) { struct da8xx_fb_par *par = arg; u32 stat = lcdc_read(LCD_STAT_REG); @@ -606,7 +717,7 @@ static irqreturn_t lcdc_irq_handler(int irq, void *arg) /* Disable PL completion inerrupt */ reg_ras = lcdc_read(LCD_RASTER_CTRL_REG); - reg_ras &= ~LCD_PL_ENABLE; + reg_ras &= ~LCD_V1_PL_INT_ENA; lcdc_write(reg_ras, LCD_RASTER_CTRL_REG); /* Setup and start data loading mode */ @@ -945,6 +1056,22 @@ static int __devinit fb_probe(struct platform_device *device) if (ret) goto err_clk_put; + /* Determine LCD IP Version */ + switch (lcdc_read(LCD_PID_REG)) { + case 0x4C100102: + lcd_revision = LCD_VERSION_1; + break; + case 0x4F200800: + lcd_revision = LCD_VERSION_2; + break; + default: + dev_warn(&device->dev, "Unknown PID Reg value 0x%x, " + "defaulting to LCD revision 1\n", + lcdc_read(LCD_PID_REG)); + lcd_revision = LCD_VERSION_1; + break; + } + for (i = 0, lcdc_info = known_lcd_panels; i < ARRAY_SIZE(known_lcd_panels); i++, lcdc_info++) { @@ -1085,7 +1212,13 @@ static int __devinit fb_probe(struct platform_device *device) } #endif - ret = request_irq(par->irq, lcdc_irq_handler, 0, DRIVER_NAME, par); + if (lcd_revision == LCD_VERSION_1) + lcdc_irq_handler = lcdc_irq_handler_rev01; + else + lcdc_irq_handler = lcdc_irq_handler_rev02; + + ret = request_irq(par->irq, lcdc_irq_handler, 0, + DRIVER_NAME, par); if (ret) goto irq_freq; return 0; |
