[U-Boot] [PATCH] Add AVR32 LCD support
Mark Jackson
mpfj-list at mimc.co.uk
Thu Jun 4 15:58:09 CEST 2009
This patch adds support for the AVR32 LCD controller. This patch is
based off the latest Denx master (not the current AVR32 git).
A quick summary of what's going on:-
Enable LCDC pixel clock
Enable LCDC port pins
Correctly specify LCDC guard time
Add framebuffer pointer to global_data struct
Allocate framebuffer
To use the new code, update your board config to include something like
this:-
#define CONFIG_LCD 1
#if defined(CONFIG_LCD)
#define CONFIG_CMD_BMP
#define CONFIG_ATMEL_LCD 1
#define LCD_BPP LCD_COLOR16
#define CONFIG_BMP_16BPP 1
#define CONFIG_FB_ADDR 0x10600000
#define CONFIG_WHITE_ON_BLACK 1
#define CONFIG_VIDEO_BMP_GZIP 1
#define CONFIG_SYS_VIDEO_LOGO_MAX_SIZE 262144
#define CONFIG_ATMEL_LCD_BGR555 1
#define CONFIG_SYS_CONSOLE_IS_IN_ENV 1
#define CONFIG_SPLASH_SCREEN 1
#endif
The standard U-Boot BMP and Splash-screen features should just work.
Signed-off-by: Mark Jackson <mpfj at mimc.co.uk>
---
cpu/at32ap/at32ap700x/clk.c | 5 +
cpu/at32ap/at32ap700x/portmux.c | 90
+++++++++++++++++++++
drivers/video/atmel_lcdfb.c | 5 +-
include/asm-avr32/arch-at32ap700x/chip-features.h | 5 +
include/asm-avr32/arch-at32ap700x/clk.h | 6 ++
include/asm-avr32/arch-at32ap700x/portmux.h | 5 +-
include/asm-avr32/global_data.h | 3 +
include/lcd.h | 2 +-
lib_avr32/board.c | 11 +++
9 files changed, 128 insertions(+), 4 deletions(-)
diff --git a/cpu/at32ap/at32ap700x/clk.c b/cpu/at32ap/at32ap700x/clk.c
index 2c2e19c..742bc6b 100644
--- a/cpu/at32ap/at32ap700x/clk.c
+++ b/cpu/at32ap/at32ap700x/clk.c
@@ -65,6 +65,11 @@ void clk_init(void)
#ifdef CONFIG_PLL
/* Use PLL0 as main clock */
sm_writel(PM_MCCTRL, SM_BIT(PLLSEL));
+
+#ifdef CONFIG_LCD
+ /* Set up pixel clock for the LCDC */
+ sm_writel(PM_GCCTRL(7), SM_BIT(PLLSEL) | SM_BIT(CEN));
+#endif
#endif
}
diff --git a/cpu/at32ap/at32ap700x/portmux.c
b/cpu/at32ap/at32ap700x/portmux.c
index 2a3b004..e71b2bf 100644
--- a/cpu/at32ap/at32ap700x/portmux.c
+++ b/cpu/at32ap/at32ap700x/portmux.c
@@ -202,3 +202,93 @@ void portmux_enable_spi1(unsigned long cs_mask,
unsigned long drive_strength)
PORTMUX_DIR_OUTPUT | PORTMUX_INIT_HIGH);
}
#endif
+
+#ifdef AT32AP700x_CHIP_HAS_LCDC
+void portmux_enable_lcdc(int pin_config)
+{
+ unsigned long portc_mask = 0;
+ unsigned long portd_mask = 0;
+ unsigned long porte_mask = 0;
+
+ switch(pin_config) {
+ case 0:
+ portc_mask = (1 << 19) /* CC */
+ | (1 << 20) /* HSYNC */
+ | (1 << 21) /* PCLK */
+ | (1 << 22) /* VSYNC */
+ | (1 << 23) /* DVAL */
+ | (1 << 24) /* MODE */
+ | (1 << 25) /* PWR */
+ | (1 << 26) /* DATA0 */
+ | (1 << 27) /* DATA1 */
+ | (1 << 28) /* DATA2 */
+ | (1 << 29) /* DATA3 */
+ | (1 << 30) /* DATA4 */
+ | (1 << 31); /* DATA5 */
+
+ portd_mask = (1 << 0) /* DATA6 */
+ | (1 << 1) /* DATA7 */
+ | (1 << 2) /* DATA8 */
+ | (1 << 3) /* DATA9 */
+ | (1 << 4) /* DATA10 */
+ | (1 << 5) /* DATA11 */
+ | (1 << 6) /* DATA12 */
+ | (1 << 7) /* DATA13 */
+ | (1 << 8) /* DATA14 */
+ | (1 << 9) /* DATA15 */
+ | (1 << 10) /* DATA16 */
+ | (1 << 11) /* DATA17 */
+ | (1 << 12) /* DATA18 */
+ | (1 << 13) /* DATA19 */
+ | (1 << 14) /* DATA20 */
+ | (1 << 15) /* DATA21 */
+ | (1 << 16) /* DATA22 */
+ | (1 << 17); /* DATA23 */
+ break;
+
+ case 1:
+ portc_mask = (1 << 20) /* HSYNC */
+ | (1 << 21) /* PCLK */
+ | (1 << 22) /* VSYNC */
+ | (1 << 25) /* PWR */
+ | (1 << 31); /* DATA5 */
+
+ portd_mask = (1 << 0) /* DATA6 */
+ | (1 << 1) /* DATA7 */
+ | (1 << 7) /* DATA13 */
+ | (1 << 8) /* DATA14 */
+ | (1 << 9) /* DATA15 */
+ | (1 << 16) /* DATA22 */
+ | (1 << 17); /* DATA23 */
+
+ porte_mask = (1 << 0) /* CC */
+ | (1 << 1) /* DVAL */
+ | (1 << 2) /* MODE */
+ | (1 << 3) /* DATA0 */
+ | (1 << 4) /* DATA1 */
+ | (1 << 5) /* DATA2 */
+ | (1 << 6) /* DATA3 */
+ | (1 << 7) /* DATA4 */
+ | (1 << 8) /* DATA8 */
+ | (1 << 9) /* DATA9 */
+ | (1 << 10) /* DATA10 */
+ | (1 << 11) /* DATA11 */
+ | (1 << 12) /* DATA12 */
+ | (1 << 13) /* DATA16 */
+ | (1 << 14) /* DATA17 */
+ | (1 << 15) /* DATA18 */
+ | (1 << 16) /* DATA19 */
+ | (1 << 17) /* DATA20 */
+ | (1 << 18); /* DATA21 */
+ break;
+ }
+
+ /* REVISIT: Some pins are probably pure outputs */
+ portmux_select_peripheral(PORTMUX_PORT_C, portc_mask,
+ PORTMUX_FUNC_A, PORTMUX_BUSKEEPER);
+ portmux_select_peripheral(PORTMUX_PORT_D, portd_mask,
+ PORTMUX_FUNC_A, PORTMUX_BUSKEEPER);
+ portmux_select_peripheral(PORTMUX_PORT_E, porte_mask,
+ PORTMUX_FUNC_B, PORTMUX_BUSKEEPER);
+}
+#endif
diff --git a/drivers/video/atmel_lcdfb.c b/drivers/video/atmel_lcdfb.c
index 3a51cc7..14f578e 100644
--- a/drivers/video/atmel_lcdfb.c
+++ b/drivers/video/atmel_lcdfb.c
@@ -42,6 +42,7 @@ short console_row;
/* configurable parameters */
#define ATMEL_LCDC_CVAL_DEFAULT 0xc8
#define ATMEL_LCDC_DMA_BURST_LEN 8
+#define ATMEL_LCDC_GUARD_TIME 2
#if defined(CONFIG_AT91SAM9263) || defined(CONFIG_AT91CAP9)
#define ATMEL_LCDC_FIFO_SIZE 2048
@@ -69,7 +70,7 @@ void lcd_ctrl_init(void *lcdbase)
/* Turn off the LCD controller and the DMA controller */
lcdc_writel(panel_info.mmio, ATMEL_LCDC_PWRCON,
- 1 << ATMEL_LCDC_GUARDT_OFFSET);
+ ATMEL_LCDC_GUARD_TIME << ATMEL_LCDC_GUARDT_OFFSET);
/* Wait for the LCDC core to become idle */
while (lcdc_readl(panel_info.mmio, ATMEL_LCDC_PWRCON) &
ATMEL_LCDC_BUSY)
@@ -150,7 +151,7 @@ void lcd_ctrl_init(void *lcdbase)
lcdc_writel(panel_info.mmio, ATMEL_LCDC_DMACON, ATMEL_LCDC_DMAEN);
lcdc_writel(panel_info.mmio, ATMEL_LCDC_PWRCON,
- (1 << ATMEL_LCDC_GUARDT_OFFSET) | ATMEL_LCDC_PWR);
+ (ATMEL_LCDC_GUARD_TIME << ATMEL_LCDC_GUARDT_OFFSET) |
ATMEL_LCDC_PWR);
}
ulong calc_fbsize(void)
diff --git a/include/asm-avr32/arch-at32ap700x/chip-features.h
b/include/asm-avr32/arch-at32ap700x/chip-features.h
index c47107e..40a2476 100644
--- a/include/asm-avr32/arch-at32ap700x/chip-features.h
+++ b/include/asm-avr32/arch-at32ap700x/chip-features.h
@@ -32,4 +32,9 @@
#define AT32AP700x_CHIP_HAS_MACB
#endif
+/* AP7000 and AP7002 have LCD controller, but AP7001 does not */
+#if defined(CONFIG_AT32AP7000) || defined(CONFIG_AT32AP7002)
+#define AT32AP700x_CHIP_HAS_LCDC
+#endif
+
#endif /* __ASM_AVR32_ARCH_CHIP_FEATURES_H__ */
diff --git a/include/asm-avr32/arch-at32ap700x/clk.h
b/include/asm-avr32/arch-at32ap700x/clk.h
index d83e93b..7a0b655 100644
--- a/include/asm-avr32/arch-at32ap700x/clk.h
+++ b/include/asm-avr32/arch-at32ap700x/clk.h
@@ -83,6 +83,12 @@ static inline unsigned long get_spi_clk_rate(unsigned
int dev_id)
return get_pba_clk_rate();
}
#endif
+#ifdef AT32AP700x_CHIP_HAS_LCDC
+static inline unsigned long get_lcdc_clk_rate(unsigned int dev_id)
+{
+ return get_hsb_clk_rate();
+}
+#endif
extern void clk_init(void);
diff --git a/include/asm-avr32/arch-at32ap700x/portmux.h
b/include/asm-avr32/arch-at32ap700x/portmux.h
index 96fe70d..8574aec 100644
--- a/include/asm-avr32/arch-at32ap700x/portmux.h
+++ b/include/asm-avr32/arch-at32ap700x/portmux.h
@@ -85,5 +85,8 @@ void portmux_enable_mmci(unsigned int slot, unsigned
long flags,
void portmux_enable_spi0(unsigned long cs_mask, unsigned long
drive_strength);
void portmux_enable_spi1(unsigned long cs_mask, unsigned long
drive_strength);
#endif
-
+#ifdef AT32AP700x_CHIP_HAS_LCDC
+void portmux_enable_lcdc(int pin_config);
+#endif
+
#endif /* __ASM_AVR32_ARCH_PORTMUX_H__ */
diff --git a/include/asm-avr32/global_data.h
b/include/asm-avr32/global_data.h
index 97a6c61..efbdda9 100644
--- a/include/asm-avr32/global_data.h
+++ b/include/asm-avr32/global_data.h
@@ -42,6 +42,9 @@ typedef struct global_data {
unsigned long env_addr; /* Address of env struct */
unsigned long env_valid; /* Checksum of env valid? */
unsigned long cpu_hz; /* cpu core clock frequency */
+#if defined(CONFIG_LCD)
+ void *fb_base; /* framebuffer address */
+#endif
void **jt; /* jump table */
} gd_t;
diff --git a/include/lcd.h b/include/lcd.h
index f054cac..0d6549c 100644
--- a/include/lcd.h
+++ b/include/lcd.h
@@ -314,7 +314,7 @@ void lcd_show_board_info(void);
#if LCD_BPP == LCD_MONOCHROME
# define COLOR_MASK(c) ((c) | (c) << 1 | (c) << 2 | (c) << 3 | \
(c) << 4 | (c) << 5 | (c) << 6 | (c) << 7)
-#elif LCD_BPP == LCD_COLOR8
+#elif (LCD_BPP == LCD_COLOR8) || (LCD_BPP == LCD_COLOR16)
# define COLOR_MASK(c) (c)
#else
# error Unsupported LCD BPP.
diff --git a/lib_avr32/board.c b/lib_avr32/board.c
index 57115df..1389ada 100644
--- a/lib_avr32/board.c
+++ b/lib_avr32/board.c
@@ -239,6 +239,17 @@ void board_init_f(ulong board_type)
addr -= CONFIG_SYS_DMA_ALLOC_LEN;
#endif
+#ifdef CONFIG_LCD
+#ifdef CONFIG_FB_ADDR
+ printf("LCD: Frame buffer allocated at preset 0x%08x\n",
CONFIG_FB_ADDR);
+ gd->fb_base = (void*)CONFIG_FB_ADDR;
+#else
+ addr = lcd_setmem(addr);
+ printf("LCD: Frame buffer allocated at 0x%08lx\n", addr);
+ gd->fb_base = (void*)addr;
+#endif /* CONFIG_FB_ADDR */
+#endif /* CONFIG_LCD */
+
/* Allocate a Board Info struct on a word boundary */
addr -= sizeof(bd_t);
addr &= ~3UL;
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