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-rw-r--r--board/zylonite/lowlevel_init.S149
-rw-r--r--include/asm-arm/arch-pxa/hardware.h159
-rw-r--r--include/asm-arm/global_data.h7
3 files changed, 199 insertions, 116 deletions
diff --git a/board/zylonite/lowlevel_init.S b/board/zylonite/lowlevel_init.S
index 54c2adf..4d62be5 100644
--- a/board/zylonite/lowlevel_init.S
+++ b/board/zylonite/lowlevel_init.S
@@ -39,6 +39,16 @@ DRAM_SIZE: .long CFG_DRAM_SIZE
.endm
+.macro wait time
+ ldr r2, =OSCR
+ mov r3, #0
+ str r3, [r2]
+0:
+ ldr r3, [r2]
+ cmp r3, \time
+ bls 0b
+.endm
+
/*
* Memory setup
*/
@@ -48,7 +58,7 @@ lowlevel_init:
/* Set up GPIO pins first ----------------------------------------- */
mov r10, lr
- /* GPIO41, 42, 43, 44, 45, 46, 47, 48 */
+ /* Configure GPIO Pins 41 - 48 as UART1 / altern. Fkt. 2 */
ldr r0, =0x40E10438 @ GPIO41 FFRXD
ldr r1, =0x802
str r1, [r0]
@@ -82,7 +92,7 @@ lowlevel_init:
str r1, [r0]
/* tebrandt - ASCR, clear the RDH bit */
- ldr r0, =ASCR
+ ldr r0, =ASCR
ldr r1, [r0]
bic r1, r1, #0x80000000
str r1, [r0]
@@ -101,16 +111,18 @@ lowlevel_init:
/* FIXME: can be optimized later */
/* ---------------------------------------------------------------- */
- ldr r3, =OSCR /* reset the OS Timer Count to zero */
- mov r2, #0
- str r2, [r3]
- ldr r4, =0x300 /* really 0x2E1 is about 200usec, */
- /* so 0x300 should be plenty */
-1:
- ldr r2, [r3]
- cmp r4, r2
- bgt 1b
-
+ /* mk: replaced with wait macro */
+/* ldr r3, =OSCR /\* reset the OS Timer Count to zero *\/ */
+/* mov r2, #0 */
+/* str r2, [r3] */
+/* ldr r4, =0x300 /\* really 0x2E1 is about 200usec, *\/ */
+/* /\* so 0x300 should be plenty *\/ */
+/* 1: */
+/* ldr r2, [r3] */
+/* cmp r4, r2 */
+/* bgt 1b */
+ wait #300
+
mem_init:
/* configure the MEMCLKCFG register */
@@ -209,8 +221,12 @@ mem_init:
str r2, [r1]
ldr r2, [r1]
- /* DDR Read-Strobe Delay Calibration */
- /* bl ddr_calibration */
+ /* Hardware DDR Read-Strobe Delay Calibration */
+ ldr r0, =DDR_HCAL @ DDR_HCAL
+ ldr r1, =0x803ffc07 @ the offset is correct? -SC
+ str r1, [r0]
+ wait #5
+ ldr r1, [r0]
/* Here we assume the hardware calibration alwasy be successful. -SC */
/* Set DMCEN bit in MDCNFG Register */
@@ -220,10 +236,12 @@ mem_init:
str r1, [r0]
/* scrub/init SDRAM if enabled/present */
- ldr r11, =0xa0000000 //RAM_BASE // base address of SDRAM
- ldr r12, =0x04000000 // size of memory to scrub
- mov r8,r12 // save DRAM size
- mov r0, #0 // scrub with 0x0000:0000
+/* ldr r11, =0xa0000000 /\* base address of SDRAM (CFG_DRAM_BASE) *\/ */
+/* ldr r12, =0x04000000 /\* size of memory to scrub (CFG_DRAM_SIZE) *\/ */
+/* mov r8,r12 /\* save DRAM size (mk: why???) *\/ */
+ ldr r8, =0xa0000000 /* base address of SDRAM (CFG_DRAM_BASE) */
+ ldr r9, =0x04000000 /* size of memory to scrub (CFG_DRAM_SIZE) */
+ mov r0, #0 /* scrub with 0x0000:0000 */
mov r1, #0
mov r2, #0
mov r3, #0
@@ -232,8 +250,8 @@ mem_init:
mov r6, #0
mov r7, #0
10: /* fastScrubLoop */
- subs r12, r12, #32 // 32 bytes/line
- stmia r11!, {r0-r7}
+ subs r9, r9, #32 // 32 bytes/line
+ stmia r8!, {r0-r7}
beq 15f
b 10b
@@ -264,3 +282,94 @@ mem_init:
endlowlevel_init:
mov pc, lr
+
+
+/*
+@********************************************************************************
+@ DDR calibration
+@
+@ This function is used to calibrate DQS delay lines.
+@ Monahans supports three ways to do it. One is software
+@ calibration. Two is hardware calibration. Three is hybrid
+@ calibration.
+@
+@ TBD
+@ -SC
+ddr_calibration:
+
+ @ Case 1: Write the correct delay value once
+ @ Configure DDR_SCAL Register
+ ldr r0, =DDR_SCAL @ DDR_SCAL
+q ldr r1, =0xaf2f2f2f
+ str r1, [r0]
+ ldr r1, [r0]
+*/
+/* @ Case 2: Software Calibration
+ @ Write test pattern to memory
+ ldr r5, =0x0faf0faf @ Data Pattern
+ ldr r4, =0xa0000000 @ DDR ram
+ str r5, [r4]
+
+ mov r1, =0x0 @ delay count
+ mov r6, =0x0
+ mov r7, =0x0
+ddr_loop1:
+ add r1, r1, =0x1
+ cmp r1, =0xf
+ ble end_loop
+ mov r3, r1
+ mov r0, r1, lsl #30
+ orr r3, r3, r0
+ mov r0, r1, lsl #22
+ orr r3, r3, r0
+ mov r0, r1, lsl #14
+ orr r3, r3, r0
+ orr r3, r3, =0x80000000
+ ldr r2, =DDR_SCAL
+ str r3, [r2]
+
+ ldr r2, [r4]
+ cmp r2, r5
+ bne ddr_loop1
+ mov r6, r1
+ddr_loop2:
+ add r1, r1, =0x1
+ cmp r1, =0xf
+ ble end_loop
+ mov r3, r1
+ mov r0, r1, lsl #30
+ orr r3, r3, r0
+ mov r0, r1, lsl #22
+ orr r3, r3, r0
+ mov r0, r1, lsl #14
+ orr r3, r3, r0
+ orr r3, r3, =0x80000000
+ ldr r2, =DDR_SCAL
+ str r3, [r2]
+
+ ldr r2, [r4]
+ cmp r2, r5
+ be ddr_loop2
+ mov r7, r2
+
+ add r3, r6, r7
+ lsr r3, r3, =0x1
+ mov r0, r1, lsl #30
+ orr r3, r3, r0
+ mov r0, r1, lsl #22
+ orr r3, r3, r0
+ mov r0, r1, lsl #14
+ orr r3, r3, r0
+ orr r3, r3, =0x80000000
+ ldr r2, =DDR_SCAL
+
+end_loop:
+
+ @ Case 3: Hardware Calibratoin
+ ldr r0, =DDR_HCAL @ DDR_HCAL
+ ldr r1, =0x803ffc07 @ the offset is correct? -SC
+ str r1, [r0]
+ wait #5
+ ldr r1, [r0]
+ mov pc, lr
+*/
diff --git a/include/asm-arm/arch-pxa/hardware.h b/include/asm-arm/arch-pxa/hardware.h
index a12aea1..c8c479a 100644
--- a/include/asm-arm/arch-pxa/hardware.h
+++ b/include/asm-arm/arch-pxa/hardware.h
@@ -8,6 +8,11 @@
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
+ *
+ * Note: This file was taken from linux-2.4.19-rmk4-pxa1
+ *
+ * - 2003/01/20 implementation specifics activated
+ * Robert Schwebel <r.schwebel@pengutronix.de>
*/
#ifndef __ASM_ARCH_HARDWARE_H
@@ -16,6 +21,16 @@
#include <linux/config.h>
#include <asm/mach-types.h>
+
+/*
+ * These are statically mapped PCMCIA IO space for designs using it as a
+ * generic IO bus, typically with ISA parts, hardwired IDE interfaces, etc.
+ * The actual PCMCIA code is mapping required IO region at run time.
+ */
+#define PCMCIA_IO_0_BASE 0xf6000000
+#define PCMCIA_IO_1_BASE 0xf7000000
+
+
/*
* We requires absolute addresses.
*/
@@ -29,63 +44,22 @@
#define UNCACHED_ADDR UNCACHED_PHYS_0
/*
- * Intel PXA2xx internal register mapping:
+ * Intel PXA internal I/O mappings:
*
- * 0x40000000 - 0x41ffffff <--> 0xf2000000 - 0xf3ffffff
- * 0x44000000 - 0x45ffffff <--> 0xf4000000 - 0xf5ffffff
- * 0x48000000 - 0x49ffffff <--> 0xf6000000 - 0xf7ffffff
- * 0x4c000000 - 0x4dffffff <--> 0xf8000000 - 0xf9ffffff
- * 0x50000000 - 0x51ffffff <--> 0xfa000000 - 0xfbffffff
- * 0x54000000 - 0x55ffffff <--> 0xfc000000 - 0xfdffffff
- * 0x58000000 - 0x59ffffff <--> 0xfe000000 - 0xffffffff
- *
- * Note that not all PXA2xx chips implement all those addresses, and the
- * kernel only maps the minimum needed range of this mapping.
- */
-#ifndef CONFIG_CPU_MONAHANS
-#define io_p2v(x) (0xf2000000 + ((x) & 0x01ffffff) + (((x) & 0x1c000000) >> 1))
-#define io_v2p(x) (0x3c000000 + ((x) & 0x01ffffff) + (((x) & 0x0e000000) << 1))
-#else
-
-/* There are too many IO area needed to map, so I divide them into 3 areas
- * 0x40000000 - 0x41ffffff <--> 0xf6000000 - 0xf7ffffff Devs
+ * 0x40000000 - 0x41ffffff <--> 0xf8000000 - 0xf9ffffff
+ * 0x44000000 - 0x45ffffff <--> 0xfa000000 - 0xfbffffff
+ * 0x48000000 - 0x49ffffff <--> 0xfc000000 - 0xfdffffff
*/
-#define io_p2v(x) ((((x) & 0xfc000000)>>4) + 0xf2000000 + ((x)&0x01ffffff))
-#define io_v2p(x) (((((x) - 0xf2000000)&0xfc000000)<<4) + ((x)&0x01ffffff))
-/*
- * 0x42000000 - 0x421fffff <--> 0xf8000000 - 0xf81fffff MMC2 & USIM2
- * 0x43000000 - 0x430fffff <--> 0xf8200000 - 0xf82fffff Caddo
- * 0x43100000 - 0x431fffff <--> 0xf8300000 - 0xf83fffff NAND
- * 0x44000000 - 0x440fffff <--> 0xf8400000 - 0xf84fffff LCD
- * 0x46000000 - 0x460fffff <--> 0xf8800000 - 0xf88fffff Mini LCD
- * 0x48100000 - 0x481fffff <--> 0xf8d00000 - 0xf8dfffff Dynamic Mem Ctl
- * 0x4a000000 - 0x4a0fffff <--> 0xf9000000 - 0xf90fffff Static Mem Ctl
- * 0x4c000000 - 0x4c0fffff <--> 0xf9400000 - 0xf94fffff USB Host
- */
-
-#define io_p2v_2(x) (((((x) - 0x42000000) & 0xff000000) >> 3) + 0xf8000000\
- + ((x) & 0x001fffff))
-#define io_v2p_2(x) (((((x) & 0xffe00000) - 0xf8000000) << 3) + 0x42000000\
- + (x & 0x001fffff))
-/*
- * 0x50000000 - 0x500fffff <--> 0xfa000000 - 0xfa0fffff Camera Interface
- * 0x54000000 - 0x540fffff <--> 0xfa400000 - 0xfa4fffff 2D Graphics Ctrl
- * 0x54100000 - 0x541fffff <--> 0xfa500000 - 0xfa5fffff USB Device 2.0 Ctrl
- * 0x58000000 - 0x580fffff <--> 0xfa800000 - 0xfa8fffff Internal SRAM Ctrl
- */
-
-#define io_p2v_3(x) ((((x) & 0xfc000000) >> 4) + 0xf5000000 + \
- ((x) & 0x001fffff))
-#define io_v2p_3(x) (((((x) - 0xf5000000) & 0x0fc00000) << 4) + \
- ((x) & 0x001fffff))
-#endif /* CONFIG_CPU_MONAHANS */
+/* FIXME: Only this does work for u-boot... find out why... [RS] */
+#define UBOOT_REG_FIX 1
+#ifndef UBOOT_REG_FIX
#ifndef __ASSEMBLY__
-#if 0
-# define __REG(x) (*((volatile u32 *)io_p2v(x)))
-#else
+#define io_p2v(x) ( ((x) | 0xbe000000) ^ (~((x) >> 1) & 0x06000000) )
+#define io_v2p( x ) ( ((x) & 0x41ffffff) ^ ( ((x) & 0x06000000) << 1) )
+
/*
* This __REG() version gives the same results as the one above, except
* that we are fooling gcc somehow so it generates far better and smaller
@@ -96,56 +70,66 @@
typedef struct { volatile u32 offset[4096]; } __regbase;
# define __REGP(x) ((__regbase *)((x)&~4095))->offset[((x)&4095)>>2]
# define __REG(x) __REGP(io_p2v(x))
+#endif
-/* __REG_2 is for NAND, LCD etc.
- * __REG_3 is for Camera Interface, 2D Graphics, U2D etc.*/
-#ifdef CONFIG_CPU_MONAHANS
-#define __REG_2(x) __REGP(io_p2v_2(x))
-#define __REG_3(x) __REGP(io_p2v_3(x))
-
-#endif /* CONFIG_CPU_MONAHANS */
-#endif /* if 0 */
-
-/* With indexed regs we don't want to feed the index through io_p2v()
- especially if it is a variable, otherwise horrible code will result. */
-# define __REG2(x,y) (*(volatile u32 *)((u32)&__REG(x) + (y)))
+/* Let's kick gcc's ass again... */
+# define __REG2(x,y) \
+ ( __builtin_constant_p(y) ? (__REG((x) + (y))) \
+ : (*(volatile u32 *)((u32)&__REG(x) + (y))) )
# define __PREG(x) (io_v2p((u32)&(x)))
-#else /* ifndef __ASSEMBLY__ */
+#else
# define __REG(x) io_p2v(x)
# define __PREG(x) io_v2p(x)
-#ifdef CONFIG_CPU_MONAHANS
-# define __REG_2(x) io_p2v(x)
-# define __REG_3(x) io_p2v(x)
-#endif /* CONFIG_CPU_MONAHANS */
+# undef io_p2v
+# undef __REG
+# ifndef __ASSEMBLY__
+# define io_p2v(PhAdd) (PhAdd)
+# define __REG(x) (*((volatile u32 *)io_p2v(x)))
+# define __REG2(x,y) (*(volatile u32 *)((u32)&__REG(x) + (y)))
+# else
+# define __REG(x) (x)
+# ifdef CONFIG_CPU_MONAHANS /* Hack to make this work with mona's pxa-regs.h */
+# define __REG_2(x) (x)
+# define __REG_3(x) (x)
+# endif
+# endif
+#endif /* UBOOT_REG_FIX */
-#endif /* ifndef __ASSEMBLY__ */
+#include "pxa-regs.h"
#ifndef __ASSEMBLY__
-#ifdef CONFIG_MACH_ZYLONITE
-#include "zylonite.h"
-#endif
+/*
+ * GPIO edge detection for IRQs:
+ * IRQs are generated on Falling-Edge, Rising-Edge, or both.
+ * This must be called *before* the corresponding IRQ is registered.
+ * Use this instead of directly setting GRER/GFER.
+ */
+#define GPIO_FALLING_EDGE 1
+#define GPIO_RISING_EDGE 2
+#define GPIO_BOTH_EDGES 3
+extern void set_GPIO_IRQ_edge( int gpio_nr, int edge_mask );
/*
* Handy routine to set GPIO alternate functions
*/
-extern void pxa_gpio_mode( int gpio_mode );
+extern void set_GPIO_mode( int gpio_mode );
/*
- * Routine to enable or disable CKEN
+ * return current lclk frequency in units of 10kHz
*/
-extern void pxa_set_cken(int clock, int enable);
+extern unsigned int get_lclk_frequency_10khz(void);
+
+#endif
+
/*
- * return current memory and LCD clock frequency in units of 10kHz
+ * Implementation specifics
*/
-extern unsigned int get_memclk_frequency_10khz(void);
-extern unsigned int get_lcdclk_frequency_10khz(void);
-#endif /* __ASSEMBLY__ */
#ifdef CONFIG_ARCH_LUBBOCK
#include "lubbock.h"
@@ -159,15 +143,6 @@ extern unsigned int get_lcdclk_frequency_10khz(void);
#include "cerf.h"
#endif
-#if CONFIG_CPU_MONAHANS_L2CACHE
-#define __cpuc_flush_l2cache_all xscale_flush_l2cache_all
-extern void __cpuc_flush_l2cache_all(void);
-#define flush_l2cache_all __cpuc_flush_l2cache_all
-#else
-#define __cpuc_flush_l2cache_all() do {} while (0)
-#define flush_l2cache_all() do {} while (0)
-#endif
-
#ifdef CONFIG_ARCH_CSB226
#include "csb226.h"
#endif
@@ -180,10 +155,4 @@ extern void __cpuc_flush_l2cache_all(void);
#include "pleb.h"
#endif
-#ifdef CONFIG_MACH_MAINSTONE
-#include "mainstone.h"
-#endif
-
-#include "pxa-regs.h"
-
-#endif /* _ASM_ARCH_HARDWARE_H */
+#endif /* _ASM_ARCH_HARDWARE_H */
diff --git a/include/asm-arm/global_data.h b/include/asm-arm/global_data.h
index c2d5291..b3c7084 100644
--- a/include/asm-arm/global_data.h
+++ b/include/asm-arm/global_data.h
@@ -61,6 +61,11 @@ typedef struct global_data {
#define GD_FLG_DEVINIT 0x00002 /* Devices have been initialized */
#define GD_FLG_SILENT 0x00004 /* Silent mode */
-#define DECLARE_GLOBAL_DATA_PTR register volatile gd_t *gd asm ("r8")
+#define GCC_4_SCREW_GDP 1
+#ifdef GCC_4_SCREW_GDP
+# define DECLARE_GLOBAL_DATA_PTR register gd_t* volatile gd asm ("r8");
+#else
+# define DECLARE_GLOBAL_DATA_PTR register volatile gd_t *gd asm ("r8")
+#endif
#endif /* __ASM_GBL_DATA_H */
generated by cgit v1.1 at 2024-12-26 17:22:32 +0000