//// File: hwinit_dm270.S//// Common portions of setup, head (rrload) and head (linux)//// Contains the necessary h/w setup specific to the TI DM270 EVM board.//// Derived from setup_dsc21.S, by RidgeRun, Inc.// 09/26/02 Todd Fischer////  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  SOFTWARE  IS  PROVIDED  ``AS  IS''  AND   ANY  EXPRESS  OR IMPLIED//  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF//  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN//  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT,  INDIRECT,//  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT//  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF//  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON//  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT//  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF//  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.////  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.,//  675 Mass Ave, Cambridge, MA 02139, USA.#include "memconfig.h"#include "dm270-registers.h"		.global hw_ini	// Save lr so we can returnhw_ini:	mov r9, lr	              // Initialize the board's clocks.        bl clock_ini        // Pause to let the PPLs lock        mov  r1, #0xFF00wloop:  subs r1, r1, #1        bne  wloop#if defined(BSPCONF_DM270_INGENIENT_MDV4100)	// Initialize Pre GIO settings	bl gio_ini#endif#if defined(BSPCONF_DM270_INGENIENT_TOKRA)	// Initialize Pre GIO settings	bl gio_ini#endif                	// Initialize board's memory controller        bl memcntl_ini        // Initialize board's SDRAM controller        bl sdram_ini        // Initialize board's HPI memory        bl dsp_ini        // Initialize UART 0        bl uart0_ini#if defined(BSPCONF_DM270_INGENIENT_MP4900)        // Enable CS8900 LAN chip	#if !defined(CADENUX_DM270_PMP)        	bl lan_ini	#endif#endif                #if defined(BSPCONF_DM270_INGENIENT_MDV4100)        // Enable CS8900 LAN chip        bl lan_ini#endif        		        bl clr_cmdlinedone_hwinit:	mov lr, r9   		mov pc, lr// **********************// Macro regw(add,data)// **********************        .macro regw, reg_add, reg_data        ldr r0, =\reg_add        ldr r1, =\reg_data        strh r1, [r0]               .endm                // **********************// Macro regr(add,data)// **********************        .macro regr, reg_add, reg_data        ldr r0, =\reg_add        ldrh \reg_data, [r0]               .endm                // **********************// Macro short_wait()// **********************        .macro short_wait	nop	nop	nop	nop        .endm                // **************************************// Clear out linux command line override.// (see __KernCommandLineOverride of kernel's setup.c)        // **************************************clr_cmdline:                    regw CMDLINEOVERRIDE, NULL        mov  pc, lr        // **************************************// Setup on-board flash.// **************************************flash:                  regw EXBC_CS0CTRL1, EXBC_CS0CTRL1_DATA        regw EXBC_CS0CTRL2, EXBC_CS0CTRL1_DATA        mov  pc, lr                // **************************************// CLOCK controller initialize// **************************************clock_ini:	regw CLOCKC_MOD0, MOD0_DATA_1	/* ARM core clock enable */	regw CLOCKC_CLKC, CLKC_DATA	/* set external clock and select MXI */	regw CLOCKC_BYP,  BYPON_DATA    /* bypass PLLs until they are stable */	regw CLOCKC_PLLA, PLLA_DATA	/* prescale */_check_plla:	regr CLOCKC_PLLA, r1	mov r2, #1	cmps r2, r1, lsr #15	bne _check_plla	short_wait	regw CLOCKC_PLLB, PLLB_DATA	/* prescale */_check_pllb:	regr CLOCKC_PLLB, r1	mov r2, #1	cmps r2, r1, lsr #15	bne _check_pllb	short_wait	regw CLOCKC_CLKC, CLKC_DATA	/* clock inverse and source select */        regw CLOCKC_SEL,  SEL_DATA	regw CLOCKC_DIV,  DIV_DATA	/* ARM, SDRAM_CLK/2 */	regw CLOCKC_BYP,  BYPOFF_DATA	/* not BYPASS for all */	regw CLOCKC_MOD0, MOD0_DATA_2	/* All enable except for CEHIF */	regw CLOCKC_MOD1, MOD1_DATA	/* All enable */	regw CLOCKC_MOD2, MOD2_DATA	/* All enable */					#if defined(CADENUX_DM270_PMP)	short_wait 	regw  CLOCKC_OSEL,  OSEL_DATA   /* clock source select    */	regw  CLOCKC_O0DIV, O0DIV_DATA  /* PLD clock 54MHz   	*/	regw  CLOCKC_O1DIV, O1DIV_DATA  /* (set value+1)*2=4,SDRAM(108Mhz)/4= 27Mhz */#endif        mov  pc, lr    	    // *******************************************************// Memory Controller initialize// *******************************************************memcntl_ini:	regw EXBC_CS1CTRL1A, EXBC_CS1CTRL1A_DATA	regw EXBC_CS1CTRL1B, EXBC_CS1CTRL1B_DATA	regw EXBC_CS1CTRL2, EXBC_CS1CTRL2_DATA	regw EXBC_CS2CTRL1, EXBC_CS2CTRL1_DATA	regw EXBC_CS3CTRL1, EXBC_CS3CTRL1_DATA	regw EXBC_CS2CTRL2, EXBC_CS2CTRL2_DATA	regw EXBC_CS3CTRL2, EXBC_CS3CTRL2_DATA	regw EXBC_CS4CTRL1, EXBC_CS4CTRL1_DATA	regw EXBC_CS4CTRL2, EXBC_CS4CTRL2_DATA	regw EXBC_BUSCTRL, EXBC_BUSCTRL_DATA	regw EXBC_BUSRLS, EXBC_BUSRLS_DATA	regw EXBC_DPSTR0, EXBC_DPSTR0_DATA	regw EXBC_DPSTR1, EXBC_DPSTR1_DATA	regw EXBC_DPSTR2, EXBC_DPSTR2_DATA	regw EXBC_DPSTR3, EXBC_DPSTR3_DATA	regw EXBC_DPSTR4, EXBC_DPSTR4_DATA	regw EXBC_DPSTR5, EXBC_DPSTR5_DATA	regw EXBC_TEST,EXBC_TEST_DATA        mov  pc, lr // *******************************************************// SDRAM initialize  (and SDRAM precharge)// *******************************************************sdram_ini:	regw SDRAMC_MODE, SDMODE_DATA	/* 32bitx1 */	regw SDRAMC_REFCTL, SDREF_DATA	/* RefEn (0x40+1)*8clocks */	regw SDRAMC_MODE, SDCNT_DATA1	regw SDRAMC_MODE, SDCNT_DATA2	regw SDRAMC_MODE, SDCNT_DATA2	regw SDRAMC_MODE, SDCNT_DATA2	regw SDRAMC_MODE, SDCNT_DATA2	regw SDRAMC_MODE, SDCNT_DATA2	regw SDRAMC_MODE, SDCNT_DATA2	regw SDRAMC_MODE, SDCNT_DATA2	regw SDRAMC_MODE, SDCNT_DATA2	regw SDRAMC_MODE, SDCNT_DATA3	// set priority access#if defined(BSPCONF_DM270_INGENIENT)	regw SDRAMC_SDPRTY9,  SDRAMC_SDPRTY9_DATA	regw SDRAMC_SDPRTY10, SDRAMC_SDPRTY10_DATA	regw SDRAMC_PRTYON,   SDRAMC_PRTYON_DATA#endif	mov  pc, lr// *******************************************************// DSP (HPI memory) initialize// *******************************************************dsp_ini:	regw DSP_HPIB_CTL, DSP_RESET_DATA  /* DSP Reset */	short_wait	regw DSP_HPIB_CTL, DSP_NORMAL_DATA /* DSP Normal */	short_wait	regw DSP_HPIB_CTL, DSP_INT0_DATA   /* INT0 establish */	mov  pc, lr// *******************************************************// UART 0 initialize// *******************************************************uart0_ini:         regw (UART0_REGISTER_BASE + UART_RFCR), UART_CONST_FIFO_CLEAR        regw (UART0_REGISTER_BASE + UART_TFCR), UART_CONST_FIFO_CLEAR        regw (UART0_REGISTER_BASE + UART_LCR),  0x0000        regw (UART0_REGISTER_BASE + UART_RFCR), UART_TRIGGER_LEVEL_01        regw (UART0_REGISTER_BASE + UART_TFCR), UART_TRIGGER_LEVEL_16        regw (UART0_REGISTER_BASE + UART_BRSR), UART_BAUD_115200        regw (UART0_REGISTER_BASE + UART_MSR),  UART_MODE_1_INIT	mov  pc, lr// **************************************// Delay 1 ms// **************************************#if defined(BSPCONF_DM270_INGENIENT_TOKRA)delay_1ms:	ldr	r1, =47250		@94.5 MHz, 2 cycle loopwloop2:	subs	r1, r1, #1	bne	wloop2	mov	pc, lr#endif        // *******************************************************// GIO Initialize// *******************************************************      #if defined(BSPCONF_DM270_INGENIENT_TOKRA)gio_ini:	mov	r3, lr	regw	GIO_BITSET0, GIO_BITSET0_DATA	regw	GIO_BITCLR0, GIO_BITCLR0_DATA	regw	GIO_DIR0, GIO_DIR0_DATA	bl	delay_1ms	regw	GIO_BITSET1, GIO_BITSET1_DATA	regw	GIO_BITCLR1, GIO_BITCLR1_DATA	regw	GIO_DIR1, GIO_DIR1_DATA	bl	delay_1ms	regw	GIO_BITSET2, GIO_BITSET2_DATA	regw	GIO_BITCLR2, GIO_BITCLR2_DATA	regw	GIO_DIR2, GIO_DIR2_DATA// Wait for FX2 to set IDE_IDLE low, then we can access the hard drive	ldr	r0, =GIO_BITSET0	mov	r1, #0x4000		@ bit 14 maskidle_wait:	ldrh	r2, [r0]		@ r2 = BITSET0 value	and	r2, r2, r1		@ mask off all but bit 14	tst	r2, r2	bne	idle_wait		@ keep looping until zero// Set IDE_LOCAL low so we can access the hard drive	regw	GIO_BITCLR0, GIO_BITCLR0_DATA2	mov	pc, r3#endif        #if defined(BSPCONF_DM270_INGENIENT_MDV4100)gio_ini:	mov	r3, lr	regw	GIO_DIR1, GIO_DIR1_DATA	regw	GIO_BITCLR1, GIO_BITCLR1_DATA	mov	pc, r3#endif// *******************************************************// CS8900 initialize// *******************************************************#if defined(BSPCONF_DM270_INGENIENT_MP4900)lan_ini: 	mov 	r3, lr        regw    GIO_DIR0,    GIO_DIR0_DATA 	regw    GIO_BITSET0, GIO_BITSET0_DATA        regw    GIO_BITCLR0, GIO_BITCLR0_DATA       	mov     pc, lr#endif        #if defined(BSPCONF_DM270_INGENIENT_MDV4100)lan_ini: 	mov 	r3, lr        regw    GIO_DIR0,    GIO_DIR0_DATA        regw    GIO_BITSET0, GIO_BITSET0_DATA        regw    GIO_BITCLR0, GIO_BITCLR0_DATA       	mov     pc, lr#endifCMDLINEOVERRIDE:  .word 0x01000000NULL:             .word 0x0000MEMTEST_DATA:     .long 0xa5a5a5a5