fix pxa255_idp board

The pxa255_idp being an old unmaintained board showed several issues:
1. CONFIG_INIT_CRITICAL was still defined.
2. Neither CONFIG_MAC_PARTITION nor CONFIG_DOS_PARTITION was defined.
3. Symbol flash_addr was undeclared.
4. The boards lowlevel_init function was still called memsetup.
5. The TEXT_BASE was still 0xa3000000 rather than 0xa3080000.
6. Using -march=armv5 instead of -march=armv5te resulted in lots of
'target CPU does not support interworking' warnings on recent compilers.
7. The PXA's serial driver redefined FFUART, BTUART and STUART used as
indexes rather than the register definitions from the pxa-regs header
file. Renamed them to FFUART_INDEX, BTUART_INDEX and STUART_INDEX to
avoid any ambiguities.
8. There were several redefinition warnings concerning ICMR, OSMR3,
OSCR, OWER, OIER, RCSR and CCCR in the PXA's assembly start file.
9. The board configuration file was rather outdated.
10. The part header file defined the vendor, product and revision arrays
as unsigned chars instead of just chars in the block_dev_desc_t
structure.

Signed-off-by: Marcel Ziswiler <marcel@ziswiler.com>

1 files changed, 496 insertions, 0 deletions

diff --git a/board/pxa255_idp/lowlevel_init.S b/board/pxa255_idp/lowlevel_init.S
new file mode 100644
index 0000000..aaa4d8e
--- /dev/null
+++ b/board/pxa255_idp/lowlevel_init.S
@@ -0,0 +1,496 @@
+/*
+ * Most of this taken from Redboot hal_platform_setup.h with cleanup
+ *
+ * NOTE: I haven't clean this up considerably, just enough to get it
+ * running. See hal_platform_setup.h for the source. See
+ * board/cradle/lowlevel_init.S for another PXA250 setup that is
+ * much cleaner.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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 <config.h>
+#include <version.h>
+#include <asm/arch/pxa-regs.h>
+
+DRAM_SIZE:  .long   CFG_DRAM_SIZE
+
+/* wait for coprocessor write complete */
+	.macro CPWAIT reg
+	mrc  p15,0,\reg,c2,c0,0
+	mov  \reg,\reg
+	sub  pc,pc,#4
+	.endm
+
+/*
+ * 	Memory setup
+ */
+.globl lowlevel_init
+lowlevel_init:
+
+	mov      r10, lr
+
+#ifdef DEBUG_BLINK_ENABLE
+	/* 3rd blink */
+	bl	blink
+#endif
+
+	/* Set up GPIO pins first ----------------------------------------- */
+	ldr		r0,	=GPSR0
+	ldr		r1,	=CFG_GPSR0_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=GPSR1
+	ldr		r1,	=CFG_GPSR1_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=GPSR2
+	ldr		r1,	=CFG_GPSR2_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=GPCR0
+	ldr		r1,	=CFG_GPCR0_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=GPCR1
+	ldr		r1,	=CFG_GPCR1_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=GPCR2
+	ldr		r1,	=CFG_GPCR2_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=GPDR0
+	ldr		r1,	=CFG_GPDR0_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=GPDR1
+	ldr		r1,	=CFG_GPDR1_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=GPDR2
+	ldr		r1,	=CFG_GPDR2_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=GAFR0_L
+	ldr		r1,	=CFG_GAFR0_L_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=GAFR0_U
+	ldr		r1,	=CFG_GAFR0_U_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=GAFR1_L
+	ldr		r1,	=CFG_GAFR1_L_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=GAFR1_U
+	ldr		r1,	=CFG_GAFR1_U_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=GAFR2_L
+	ldr		r1,	=CFG_GAFR2_L_VAL
+	str		r1,   [r0]
+
+	ldr		r0,	=GAFR2_U
+	ldr		r1,	=CFG_GAFR2_U_VAL
+	str		r1,   [r0]
+
+	ldr	r0,	=PSSR		/* enable GPIO pins */
+	ldr		r1,	=CFG_PSSR_VAL
+	str		r1,   [r0]
+
+#ifdef DEBUG_BLINK_ENABLE
+	/* 4th debug blink */
+	bl 	blink
+#endif
+
+	/* ---------------------------------------------------------------- */
+	/* Enable memory interface                                          */
+	/*                                                                  */
+	/* The sequence below is based on the recommended init steps        */
+	/* detailed in the Intel PXA250 Operating Systems Developers Guide, */
+	/* Chapter 10.                                                      */
+	/* ---------------------------------------------------------------- */
+
+	/* ---------------------------------------------------------------- */
+	/* Step 1: Wait for at least 200 microsedonds to allow internal     */
+	/*         clocks to settle. Only necessary after hard reset...     */
+	/*         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
+
+mem_init:
+
+	ldr     r1,  =MEMC_BASE		/* get memory controller base addr. */
+
+	/* ---------------------------------------------------------------- */
+	/* Step 2a: Initialize Asynchronous static memory controller        */
+	/* ---------------------------------------------------------------- */
+
+	/* MSC registers: timing, bus width, mem type                       */
+
+	/* MSC0: nCS(0,1)                                                   */
+	ldr     r2,   =CFG_MSC0_VAL
+	str     r2,   [r1, #MSC0_OFFSET]
+	ldr     r2,   [r1, #MSC0_OFFSET]	/* read back to ensure      */
+						/* that data latches        */
+	/* MSC1: nCS(2,3)                                                   */
+	ldr     r2,  =CFG_MSC1_VAL
+	str     r2,  [r1, #MSC1_OFFSET]
+	ldr     r2,  [r1, #MSC1_OFFSET]
+
+	/* MSC2: nCS(4,5)                                                   */
+	ldr     r2,  =CFG_MSC2_VAL
+	str     r2,  [r1, #MSC2_OFFSET]
+	ldr     r2,  [r1, #MSC2_OFFSET]
+
+	/* ---------------------------------------------------------------- */
+	/* Step 2b: Initialize Card Interface                               */
+	/* ---------------------------------------------------------------- */
+
+	/* MECR: Memory Expansion Card Register                             */
+	ldr     r2,  =CFG_MECR_VAL
+	str     r2,  [r1, #MECR_OFFSET]
+	ldr	r2,	[r1, #MECR_OFFSET]
+
+	/* MCMEM0: Card Interface slot 0 timing                             */
+	ldr     r2,  =CFG_MCMEM0_VAL
+	str     r2,  [r1, #MCMEM0_OFFSET]
+	ldr	r2,	[r1, #MCMEM0_OFFSET]
+
+	/* MCMEM1: Card Interface slot 1 timing                             */
+	ldr     r2,  =CFG_MCMEM1_VAL
+	str     r2,  [r1, #MCMEM1_OFFSET]
+	ldr	r2,	[r1, #MCMEM1_OFFSET]
+
+	/* MCATT0: Card Interface Attribute Space Timing, slot 0            */
+	ldr     r2,  =CFG_MCATT0_VAL
+	str     r2,  [r1, #MCATT0_OFFSET]
+	ldr	r2,	[r1, #MCATT0_OFFSET]
+
+	/* MCATT1: Card Interface Attribute Space Timing, slot 1            */
+	ldr     r2,  =CFG_MCATT1_VAL
+	str     r2,  [r1, #MCATT1_OFFSET]
+	ldr	r2,	[r1, #MCATT1_OFFSET]
+
+	/* MCIO0: Card Interface I/O Space Timing, slot 0                   */
+	ldr     r2,  =CFG_MCIO0_VAL
+	str     r2,  [r1, #MCIO0_OFFSET]
+	ldr	r2,	[r1, #MCIO0_OFFSET]
+
+	/* MCIO1: Card Interface I/O Space Timing, slot 1                   */
+	ldr     r2,  =CFG_MCIO1_VAL
+	str     r2,  [r1, #MCIO1_OFFSET]
+	ldr	r2,	[r1, #MCIO1_OFFSET]
+
+#ifdef DEBUG_BLINK_ENABLE
+	/* 5th blink */
+	bl 	blink
+#endif
+
+	/* ---------------------------------------------------------------- */
+	/* Step 2c: Write FLYCNFG  FIXME: what's that???                    */
+	/* ---------------------------------------------------------------- */
+
+	/* ---------------------------------------------------------------- */
+	/* Step 2d: Initialize Timing for Sync Memory (SDCLK0)              */
+	/* ---------------------------------------------------------------- */
+
+	/* Before accessing MDREFR we need a valid DRI field, so we set     */
+	/* this to power on defaults + DRI field.                           */
+
+	ldr     r3,     =CFG_MDREFR_VAL
+	ldr     r2,     =0xFFF
+	and     r3,     r3,  r2
+	ldr	r4,	=0x03ca4000
+	orr     r4,     r4,  r3
+	str	r4,	[r1, #MDREFR_OFFSET]	/* write back MDREFR        */
+	ldr     r4,  [r1, #MDREFR_OFFSET]
+
+	/* Note: preserve the mdrefr value in r4                            */
+
+	/* ---------------------------------------------------------------- */
+	/* Step 3: Initialize Synchronous Static Memory (Flash/Peripherals) */
+	/* ---------------------------------------------------------------- */
+
+	/* Initialize SXCNFG register. Assert the enable bits               */
+
+	/* Write SXMRS to cause an MRS command to all enabled banks of      */
+	/* synchronous static memory. Note that SXLCR need not be written   */
+	/* at this time.                                                    */
+
+	/* FIXME: we use async mode for now                                 */
+
+	/* ---------------------------------------------------------------- */
+	/* Step 4: Initialize SDRAM                                         */
+	/* ---------------------------------------------------------------- */
+
+	/* set MDREFR according to user define with exception of a few bits */
+
+	ldr     r4,     =CFG_MDREFR_VAL
+	orr	r4,	r4,	#(MDREFR_SLFRSH)
+	bic	r4,	r4,	#(MDREFR_E1PIN|MDREFR_E0PIN)
+	str     r4,     [r1, #MDREFR_OFFSET]    /* write back MDREFR        */
+	ldr     r4,  [r1, #MDREFR_OFFSET]
+
+	/* Step 4b: de-assert MDREFR:SLFRSH.                                */
+
+	bic	r4,	r4,	#(MDREFR_SLFRSH)
+	str     r4,     [r1, #MDREFR_OFFSET]    /* write back MDREFR        */
+	ldr     r4,  [r1, #MDREFR_OFFSET]
+
+	/* Step 4c: assert MDREFR:E1PIN and E0PIO as desired                */
+
+	ldr     r4,     =CFG_MDREFR_VAL
+	str     r4,     [r1, #MDREFR_OFFSET]    /* write back MDREFR        */
+	ldr     r4,     [r1, #MDREFR_OFFSET]
+
+
+	/* Step 4d: write MDCNFG with MDCNFG:DEx deasserted (set to 0), to  */
+	/*          configure but not enable each SDRAM partition pair.     */
+
+	ldr	r4,	=CFG_MDCNFG_VAL
+	bic	r4,	r4,	#(MDCNFG_DE0|MDCNFG_DE1)
+
+	str     r4,     [r1, #MDCNFG_OFFSET]	/* write back MDCNFG        */
+	ldr     r4,     [r1, #MDCNFG_OFFSET]
+
+	/* Step 4e: Wait for the clock to the SDRAMs to stabilize,          */
+	/*          100..200 µsec.                                          */
+
+	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
+
+	/* Step 4f: Trigger a number (usually 8) refresh cycles by          */
+	/*          attempting non-burst read or write accesses to disabled */
+	/*          SDRAM, as commonly specified in the power up sequence   */
+	/*          documented in SDRAM data sheets. The address(es) used   */
+	/*          for this purpose must not be cacheable.                 */
+
+	ldr	r3,	=CFG_DRAM_BASE
+	str	r2,	[r3]
+	str	r2,	[r3]
+	str	r2,	[r3]
+	str	r2,	[r3]
+	str	r2,	[r3]
+	str	r2,	[r3]
+	str	r2,	[r3]
+	str	r2,	[r3]
+
+	/* Step 4g: Write MDCNFG with enable bits asserted                  */
+	/*          (MDCNFG:DEx set to 1).                                  */
+
+	ldr     r3,  [r1, #MDCNFG_OFFSET]
+	orr	r3,	r3,	#(MDCNFG_DE0|MDCNFG_DE1)
+	str     r3,  [r1, #MDCNFG_OFFSET]
+
+	/* Step 4h: Write MDMRS.                                            */
+
+	ldr     r2,  =CFG_MDMRS_VAL
+	str     r2,  [r1, #MDMRS_OFFSET]
+
+	/* We are finished with Intel's memory controller initialisation    */
+#if 0
+	/* FIXME turn on serial ports */
+	/* look into moving this to board_init() */
+	ldr 	r2, =(PXA_CS5_PHYS + 0x03C0002c)
+	mov	r3, #0x13
+	str	r3, [r2]
+#endif
+
+#ifdef DEBUG_BLINK_ENABLE
+	/* 6th blink */
+	bl 	blink
+#endif
+
+	/* ---------------------------------------------------------------- */
+	/* Disable (mask) all interrupts at interrupt controller            */
+	/* ---------------------------------------------------------------- */
+
+initirqs:
+
+	mov     r1, #0		/* clear int. level register (IRQ, not FIQ) */
+	ldr     r2,  =ICLR
+	str     r1,  [r2]
+
+	ldr     r2,  =ICMR	/* mask all interrupts at the controller    */
+	str     r1,  [r2]
+
+	/* ---------------------------------------------------------------- */
+	/* Clock initialisation                                             */
+	/* ---------------------------------------------------------------- */
+
+initclks:
+
+	/* Disable the peripheral clocks, and set the core clock frequency  */
+	/* (hard-coding at 398.12MHz for now).                              */
+
+	/* Turn Off ALL on-chip peripheral clocks for re-configuration      */
+	/* Note: See label 'ENABLECLKS' for the re-enabling                 */
+#if 0
+	ldr     r1,  =CKEN
+	mov     r2,  #0
+	str     r2,  [r1]
+
+	/* default value in case no valid rotary switch setting is found    */
+	ldr     r2, =(CCCR_L27|CCCR_M2|CCCR_N10)  /* DEFAULT: {200/200/100} */
+
+	/* ... and write the core clock config register                     */
+	ldr     r1,  =CCCR
+	str     r2,  [r1]
+
+#endif
+
+#ifdef RTC
+	/* enable the 32Khz oscillator for RTC and PowerManager             */
+
+	ldr     r1,  =OSCC
+	mov     r2,  #OSCC_OON
+	str     r2,  [r1]
+
+	/* NOTE:  spin here until OSCC.OOK get set, meaning the PLL         */
+	/* has settled.                                                     */
+60:
+	ldr     r2, [r1]
+	ands    r2, r2, #1
+	beq     60b
+#endif
+
+	/* ---------------------------------------------------------------- */
+	/*                                                                  */
+	/* ---------------------------------------------------------------- */
+
+	/* Save SDRAM size */
+	ldr     r1, =DRAM_SIZE
+	str     r8, [r1]
+
+	/* Interrupt init: Mask all interrupts                              */
+	ldr	r0, =ICMR /* enable no sources */
+	mov r1, #0
+	str r1, [r0]
+
+	/* FIXME */
+
+#define NODEBUG
+#ifdef NODEBUG
+	/*Disable software and data breakpoints */
+	mov	r0,#0
+	mcr	p15,0,r0,c14,c8,0  /* ibcr0 */
+	mcr	p15,0,r0,c14,c9,0  /* ibcr1 */
+	mcr	p15,0,r0,c14,c4,0  /* dbcon */
+
+	/*Enable all debug functionality */
+	mov	r0,#0x80000000
+	mcr	p14,0,r0,c10,c0,0  /* dcsr */
+#endif
+
+	/* ---------------------------------------------------------------- */
+	/* End memsetup                                                     */
+	/* ---------------------------------------------------------------- */
+
+#ifdef DEBUG_BLINK_ENABLE
+	/* 7th blink */
+	bl 	blink
+#endif
+
+endlowlevel_init:
+
+	mov     pc, r10
+
+
+#ifdef DEBUG_BLINK_ENABLE
+
+/* debug LED code */
+
+/* delay about 200ms */
+delay:
+
+	/* reset OSCR to 0 */
+	ldr	r8, =OSCR
+	mov	r9, #0
+	str	r9, [r8]
+
+	/* make sure new value has stuck */
+1:
+	ldr	r8, =OSCR
+	ldr	r9, [r8]
+	mov	r8, #0x10000
+	cmp	r9, r8
+	bgt	1b
+
+	/* now, wait for delay to expire */
+1:
+	ldr	r8, =OSCR
+	ldr	r9, [r8]
+	mov	r8, #0xd4000
+	cmp	r8, r9
+	bgt	1b
+
+	mov	pc, lr
+
+/* blink code -- trashes r7, r8, r9 */
+
+.globl blink
+blink:
+
+	mov	r7, lr
+
+	/* set GPIO10 as outout */
+	ldr	r8,  =GPDR0
+	ldr	r9,  [r8]
+	orr	r9,  r9, #(1<<10)
+	str	r9,  [r8]
+
+	/* turn LED off */
+	mov	r9,  #(1<<10)
+	ldr	r8,  =GPCR0
+	str	r9, [r8]
+	bl	delay
+
+	/* turn LED on */
+	mov	r9,  #(1<<10)
+	ldr	r8,  =GPSR0
+	str	r9, [r8]
+	bl	delay
+
+	/* turn LED off */
+	mov	r9,  #(1<<10)
+	ldr	r8,  =GPCR0
+	str	r9, [r8]
+
+	mov	pc, r7
+
+#endif