Gigabeat S: Move the LCD framebuffer address so that DRAM can be mapped flat between physical and virtual addresses. NO BOOTLOADER UPDATE SHOULD BE NEEDED. The firmware image now handles low-level system setup as well.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19935 a1c6a512-1295-4272-9138-f99709370657

6 files changed, 36 insertions, 27 deletions

diff --git a/bootloader/gigabeat-s.c b/bootloader/gigabeat-s.c
index 57eb18e..cd3b1df 100644
--- a/bootloader/gigabeat-s.c
+++ b/bootloader/gigabeat-s.c
@@ -334,14 +334,17 @@ void main(void)
     /* Flush and invalidate all caches (because vectors were written) */
     invalidate_icache();
 
-    lcd_clear_display();
-    printf("Gigabeat S Rockbox Bootloader");
-    printf("Version %s", version);
     system_init();
     kernel_init();
 
     enable_interrupt(IRQ_FIQ_STATUS);
 
+    lcd_init_device();
+    lcd_clear_display();
+
+    printf("Gigabeat S Rockbox Bootloader");
+    printf("Version %s", version);
+
     /* Initialize KPP so we can poll the button states */
     button_init_device();
 
diff --git a/firmware/export/imx31l.h b/firmware/export/imx31l.h
index c9ef446..e31f30f 100755
--- a/firmware/export/imx31l.h
+++ b/firmware/export/imx31l.h
@@ -28,12 +28,14 @@
 #define REG32_PTR_T volatile unsigned long *
 
 /* Place in the section with the framebuffer */
-#define TTB_BASE_ADDR (0x80100000 + 0x00100000 - TTB_SIZE)
+#define TTB_BASE_ADDR (CSD0_BASE_ADDR + (MEM*0x100000) - TTB_SIZE)
 #define TTB_SIZE      (0x4000)
 #define IRAM_SIZE     (0x4000)
 #define TTB_BASE      ((unsigned long *)TTB_BASE_ADDR)
-#define FRAME         ((void*)0x03f00000)
 #define FRAME_SIZE    (240*320*2)
+/* Rockbox framebuffer address, not retail OS */
+#define FRAME_PHYS_ADDR (TTB_BASE_ADDR - FRAME_SIZE)
+#define FRAME         ((void *)(FRAME_PHYS_ADDR-CSD0_BASE_ADDR))
 
 #define DEVBSS_ATTR   __attribute__((section(".devbss"),nocommon))
 /* USBOTG */
@@ -411,6 +413,11 @@
 #define IPU_BRK_CTRL_2          (*(REG32_PTR_T)(IPU_CTRL_BASE_ADDR+0x54))
 #define IPU_BRK_STAT            (*(REG32_PTR_T)(IPU_CTRL_BASE_ADDR+0x58))
 #define IPU_DIAGB_CTRL          (*(REG32_PTR_T)(IPU_CTRL_BASE_ADDR+0x60))
+#define IPU_IDMAC_CONF          (*(REG32_PTR_T)(IPU_CTRL_BASE_ADDR+0xA4))
+#define IPU_IDMAC_CHA_EN        (*(REG32_PTR_T)(IPU_CTRL_BASE_ADDR+0xA8))
+#define IPU_IDMAC_CHA_PRI       (*(REG32_PTR_T)(IPU_CTRL_BASE_ADDR+0xAC))
+#define IPU_IDMAC_CHA_BUSY      (*(REG32_PTR_T)(IPU_CTRL_BASE_ADDR+0xB0))
+
 
 
 /* ATA */
diff --git a/firmware/target/arm/imx31/app.lds b/firmware/target/arm/imx31/app.lds
index 80123fe..4ab4665 100644
--- a/firmware/target/arm/imx31/app.lds
+++ b/firmware/target/arm/imx31/app.lds
@@ -34,7 +34,8 @@ STARTUP(target/arm/imx31/crt0.o)
 MEMORY
 {
     DRAM : ORIGIN = DRAMORIG, LENGTH = DRAMSIZE
-    DEVBSS : ORIGIN = 0x80100000 + FRAME_SIZE, LENGTH = 0x100000 - FRAME_SIZE - TTB_SIZE
+    DEVBSS : ORIGIN = CSD0_BASE_ADDR + (MEMORYSIZE * 0x100000 - 0x100000), \
+             LENGTH = 0x100000 - FRAME_SIZE - TTB_SIZE
 }
 
 SECTIONS
diff --git a/firmware/target/arm/imx31/boot.lds b/firmware/target/arm/imx31/boot.lds
index a7570c1..b108ba1 100644
--- a/firmware/target/arm/imx31/boot.lds
+++ b/firmware/target/arm/imx31/boot.lds
@@ -8,7 +8,7 @@ STARTUP(target/arm/imx31/crt0.o)
 
 #define DRAMSIZE (1 << 20) /* Limit 1 MB for bootloader */
 
-#define DRAMORIG (0x02000000-0x00100000)
+#define DRAMORIG  0x02000000
 /* #define IRAMORIG 0x1FFFC000 */
 #define IRAM      DRAM
 #define IRAMSIZE  IRAM_SIZE
@@ -19,7 +19,8 @@ STARTUP(target/arm/imx31/crt0.o)
 MEMORY
 {
    DRAM : ORIGIN = DRAMORIG, LENGTH = DRAMSIZE
-   DEVBSS : ORIGIN = 0x80100000 + FRAME_SIZE, LENGTH = 0x100000 - FRAME_SIZE - TTB_SIZE
+   DEVBSS : ORIGIN = CSD0_BASE_ADDR + (MEMORYSIZE*0x100000 - 0x100000), \
+            LENGTH = 0x100000 - FRAME_SIZE - TTB_SIZE
 }
 
 SECTIONS
diff --git a/firmware/target/arm/imx31/crt0.S b/firmware/target/arm/imx31/crt0.S
index c3bba82..8459753 100644
--- a/firmware/target/arm/imx31/crt0.S
+++ b/firmware/target/arm/imx31/crt0.S
@@ -57,7 +57,6 @@ start:
 newstart:
     msr     cpsr_c, #0xd3 /* enter supervisor mode, disable IRQ/FIQ */
 
-#ifdef BOOTLOADER
     adr     r2, remap_start    /* Load PC-relative labels */
     adr     r3, remap_end
     ldr     r5, =TTB_BASE_ADDR /* TTB pointer */
@@ -127,13 +126,6 @@ remap_start:
     /*** End of L2 operations ***/
 
     /* TTB Initialisation */
-    mov     r2, r5
-    add     r3, r5, #TTB_SIZE
-    mov     r1, #0
-1:
-    str     r1, [r2], #4
-    cmp     r2, r3
-    blo     1b
 
     /* Set TTB base address */
     mcr     p15, 0, r5, c2, c0, 0
@@ -157,32 +149,29 @@ remap_start:
     add     r1, r1, #(1 << 20)  /* Next MB */
     cmp     r2, r3
     blo     1b
-    sub     r1, r1, #TTB_SIZE/4*(1 << 20) /* Back up */
+
+    bic     r1, r1, #0x0ff00000 /* Back up */
 
     /* Map 0x80000000 -> 0x0, cached */
     mov     r2, r5               /* TTB pointer */
-    add     r3, r5, #63*4        /* End position */
+    add     r3, r5, #64*4        /* End position */
     orr     r1, r1, #0x80000000  /* Physical address */
     orr     r1, r1, #((1 << 3) | /* cache flag */ \
                       (1 << 2))  /* buffer flag */
 1:
     str     r1, [r2], #4
     add     r1, r1, #(1 << 20)
-    and     r4, r1, #0x0ff00000
-    cmp     r4, #0x00100000      /* Skip framebuffer */
-    addeq   r1, r1, #(1 << 20)
     cmp     r2, r3
     blo     1b
 
-    /* Map device section 0x80100000 to 0x03f00000 - buffered, not cached */
+    /* Map device section 0x83f00000 to 0x03f00000 - buffered, not cached */
     bic     r1, r1, #0x0ff00000
-    orr     r1, r1, #0x00100000
+    orr     r1, r1, #0x03f00000
     bic     r1, r1, #(1 << 3)
     add     r2, r5, #63*4
     str     r1, [r2]
-
+    
     /* Enable MMU */
-
     mov     r0, #0
     mcr     p15, 0, r0, c8, c7, 0 /* Invalidate TLB */
     mcr     p15, 0, r0, c7, c7, 0 /* Invalidate icache and dcache */
@@ -230,8 +219,6 @@ L_post_remap:
     .word remap_end
 remap_end:
 
-#endif /* BOOTLOADER */
-
 #ifdef BOOTLOADER
     /* Copy bootloader exception handler code to address 0 */
     ldr     r2, =_vectorsstart
diff --git a/firmware/target/arm/imx31/gigabeat-s/lcd-imx31.c b/firmware/target/arm/imx31/gigabeat-s/lcd-imx31.c
index eb14152..c353380 100644
--- a/firmware/target/arm/imx31/gigabeat-s/lcd-imx31.c
+++ b/firmware/target/arm/imx31/gigabeat-s/lcd-imx31.c
@@ -27,6 +27,7 @@
 #include "lcd-target.h"
 #include "backlight-target.h"
 
+#define MAIN_LCD_IDMAC_CHANNEL 14
 #define LCDADDR(x, y) (&lcd_framebuffer[(y)][(x)])
 
 static volatile bool lcd_on = true;
@@ -46,6 +47,15 @@ extern void lcd_copy_buffer_rect(fb_data *dst, const fb_data *src,
 /* LCD init */
 void lcd_init_device(void)
 {
+    /* Move the framebuffer */
+#ifdef BOOTLOADER
+    /* Only do this once to avoid flicker */
+    memset(FRAME, 0x00, FRAME_SIZE);
+#endif
+    IPU_IDMAC_CHA_EN &= ~(1ul << MAIN_LCD_IDMAC_CHANNEL);
+    IPU_IMA_ADDR = ((0x1 << 16) | (MAIN_LCD_IDMAC_CHANNEL << 4)) + (1 << 3);
+    IPU_IMA_DATA = FRAME_PHYS_ADDR;
+    IPU_IDMAC_CHA_EN |= (1ul << MAIN_LCD_IDMAC_CHANNEL);
 }
 
 /* Update a fraction of the display. */