ColdFire: Implement SBF feature for M5445EVB

Signed-off-by: TsiChung Liew <Tsi-Chung.Liew@freescale.com>

3 files changed, 302 insertions, 23 deletions

diff --git a/cpu/mcf5445x/cpu_init.c b/cpu/mcf5445x/cpu_init.c
index e07748b..51a9e90 100644
--- a/cpu/mcf5445x/cpu_init.c
+++ b/cpu/mcf5445x/cpu_init.c
@@ -61,11 +61,13 @@ void cpu_init_f(void)
 	    GPIO_PAR_FBCTL_OE | GPIO_PAR_FBCTL_TA_TA | GPIO_PAR_FBCTL_RW_RW |
 	    GPIO_PAR_FBCTL_TS_TS;
 
+#if !defined(CONFIG_CF_SBF)
 #if (defined(CFG_CS0_BASE) && defined(CFG_CS0_MASK) && defined(CFG_CS0_CTRL))
 	fbcs->csar0 = CFG_CS0_BASE;
 	fbcs->cscr0 = CFG_CS0_CTRL;
 	fbcs->csmr0 = CFG_CS0_MASK;
 #endif
+#endif
 
 #if (defined(CFG_CS1_BASE) && defined(CFG_CS1_MASK) && defined(CFG_CS1_CTRL))
 	/* Latch chipselect */
diff --git a/cpu/mcf5445x/speed.c b/cpu/mcf5445x/speed.c
index 967becf..f677f3c 100644
--- a/cpu/mcf5445x/speed.c
+++ b/cpu/mcf5445x/speed.c
@@ -84,26 +84,29 @@ void clock_exit_limp(void)
  */
 int get_clocks(void)
 {
+
 	volatile ccm_t *ccm = (volatile ccm_t *)MMAP_CCM;
 	volatile pll_t *pll = (volatile pll_t *)MMAP_PLL;
-	volatile u8 *cpld = (volatile u8 *)(CFG_CS2_BASE + 3);
-	volatile u8 *fpga = (volatile u8 *)(CFG_CS3_BASE + 14);
 	int pllmult_nopci[] = { 20, 10, 24, 18, 12, 6, 16, 8 };
 	int pllmult_pci[] = { 12, 6, 16, 8 };
-	int vco, bPci, temp, fbtemp, pcrvalue;
+	int vco = 0, bPci, temp, fbtemp, pcrvalue;
 	int *pPllmult = NULL;
 	u16 fbpll_mask;
-	u8 cpldmode;
+
+#ifdef CONFIG_M54455EVB
+	volatile u8 *cpld = (volatile u8 *)(CFG_CS2_BASE + 3);
+#endif
+	u8 bootmode;
 
 	/* To determine PCI is present or not */
 	if (((ccm->ccr & CCM_CCR_360_FBCONFIG_MASK) == 0x00e0) ||
 	    ((ccm->ccr & CCM_CCR_360_FBCONFIG_MASK) == 0x0060)) {
 		pPllmult = &pllmult_pci[0];
-		fbpll_mask = 3;
+		fbpll_mask = 3;		/* 11b */
 		bPci = 1;
 	} else {
 		pPllmult = &pllmult_nopci[0];
-		fbpll_mask = 7;
+		fbpll_mask = 7;		/* 111b */
 #ifdef CONFIG_PCI
 		gd->pci_clk = 0;
 #endif
@@ -111,20 +114,36 @@ int get_clocks(void)
 	}
 
 #ifdef CONFIG_M54455EVB
-	/* Temporary place here, belongs in board/freescale/... */
-	/* Temporary read from CCR- fixed fb issue, must be the same clock
-	   as pci or input clock, causing cpld/fpga read inconsistancy */
-	fbtemp = pPllmult[ccm->ccr & fbpll_mask];
+	bootmode = (*cpld & 0x03);
 
-	/* Break down into small pieces, code still in flex bus */
-	pcrvalue = pll->pcr & 0xFFFFF0FF;
-	temp = fbtemp - 1;
-	pcrvalue |= PLL_PCR_OUTDIV3(temp);
+	if (bootmode != 3) {
+		/* Temporary read from CCR- fixed fb issue, must be the same clock
+		   as pci or input clock, causing cpld/fpga read inconsistancy */
+		fbtemp = pPllmult[ccm->ccr & fbpll_mask];
 
+		/* Break down into small pieces, code still in flex bus */
+		pcrvalue = pll->pcr & 0xFFFFF0FF;
+		temp = fbtemp - 1;
+		pcrvalue |= PLL_PCR_OUTDIV3(temp);
+
+		pll->pcr = pcrvalue;
+	}
+#endif
+#ifdef CONFIG_M54451EVB
+	/* No external logic to read the bootmode, hard coded from built */
+#ifdef CONFIG_CF_SBF
+	bootmode = 3;
+#else
+	bootmode = 2;
+
+	/* default value is 16 mul, set to 20 mul */
+	pcrvalue = (pll->pcr & 0x00FFFFFF) | 0x14000000;
 	pll->pcr = pcrvalue;
+	while ((pll->psr & PLL_PSR_LOCK) != PLL_PSR_LOCK);
+#endif
+#endif
 
-	cpldmode = *cpld & 0x03;
-	if (cpldmode == 0) {
+	if (bootmode == 0) {
 		/* RCON mode */
 		vco = pPllmult[ccm->rcon & fbpll_mask] * CFG_INPUT_CLKSRC;
 
@@ -151,14 +170,22 @@ int get_clocks(void)
 			pll->pcr = pcrvalue;
 		}
 		gd->vco_clk = vco;	/* Vco clock */
-	} else if (cpldmode == 2) {
+	} else if (bootmode == 2) {
 		/* Normal mode */
-		vco = pPllmult[ccm->ccr & fbpll_mask] * CFG_INPUT_CLKSRC;
+		vco =  ((pll->pcr & 0xFF000000) >> 24) * CFG_INPUT_CLKSRC;
+		if ((vco < CLOCK_PLL_FVCO_MIN) || (vco > CLOCK_PLL_FVCO_MAX)) {
+			/* Default value */
+			pcrvalue = (pll->pcr & 0x00FFFFFF);
+			pcrvalue |= pPllmult[ccm->ccr & fbpll_mask] << 24;
+			pll->pcr = pcrvalue;
+			vco =  ((pll->pcr & 0xFF000000) >> 24) * CFG_INPUT_CLKSRC;
+		}
 		gd->vco_clk = vco;	/* Vco clock */
-	} else if (cpldmode == 3) {
+	} else if (bootmode == 3) {
 		/* serial mode */
+		vco =  ((pll->pcr & 0xFF000000) >> 24) * CFG_INPUT_CLKSRC;
+		gd->vco_clk = vco;	/* Vco clock */
 	}
-#endif				/* CONFIG_M54455EVB */
 
 	if ((ccm->ccr & CCM_MISCCR_LIMP) == CCM_MISCCR_LIMP) {
 		/* Limp mode */
diff --git a/cpu/mcf5445x/start.S b/cpu/mcf5445x/start.S
index 89ec7bc..2a6019b 100644
--- a/cpu/mcf5445x/start.S
+++ b/cpu/mcf5445x/start.S
@@ -46,15 +46,30 @@
 	addl	#60,%sp;		/* space for 15 regs */ \
 	rte;
 
+#if defined(CONFIG_CF_SBF)
+#define ASM_DRAMINIT	(asm_dram_init - TEXT_BASE + CFG_INIT_RAM_ADDR)
+#define ASM_SBF_IMG_HDR	(asm_sbf_img_hdr - TEXT_BASE + CFG_INIT_RAM_ADDR)
+#endif
+
 .text
+
 /*
  *	Vector table. This is used for initial platform startup.
  *	These vectors are to catch any un-intended traps.
  */
 _vectors:
+#if defined(CONFIG_CF_SBF)
+
+INITSP:	.long	0		/* Initial SP	*/
+INITPC:	.long	ASM_DRAMINIT	/* Initial PC 	*/
+
+#else
+
+INITSP:		.long	0	/* Initial SP	*/
+INITPC:		.long	_START	/* Initial PC 		*/
+
+#endif
 
-INITSP:		.long	0x00000000	/* Initial SP	*/
-INITPC:		.long	_START	/* Initial PC		*/
 vector02:	.long	_FAULT	/* Access Error		*/
 vector03:	.long	_FAULT	/* Address Error	*/
 vector04:	.long	_FAULT	/* Illegal Instruction	*/
@@ -83,6 +98,8 @@ vector1D:	.long	_FAULT	/* Autovector Level 5	*/
 vector1E:	.long	_FAULT	/* Autovector Level 6	*/
 vector1F:	.long	_FAULT	/* Autovector Level 7	*/
 
+#if !defined(CONFIG_CF_SBF)
+
 /* TRAP #0 - #15 */
 vector20_2F:
 .long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
@@ -122,9 +139,237 @@ vector192_255:
 .long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
 .long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
 .long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+#endif
 
-	.text
+#if defined(CONFIG_CF_SBF)
+	/* Image header: chksum 4 bytes, len 4 bytes, img dest 4 bytes */
+asm_sbf_img_hdr:
+	.long	0x00000000	/* checksum, not yet implemented */
+	.long	0x00030000	/* image length */
+	.long	TEXT_BASE	/* image to be relocated at */
+
+asm_dram_init:
+	move.l	#(CFG_INIT_RAM_ADDR + CFG_INIT_RAM_CTRL), %d0
+	movec	%d0, %RAMBAR1	/* init Rambar */
+	move.l	#(CFG_INIT_RAM_ADDR + CFG_INIT_SP_OFFSET), %sp
+	clr.l %sp@-
+
+	/* Must disable global address */
+	move.l	#0xFC008000, %a1
+	move.l	#(CFG_CS0_BASE), (%a1)
+	move.l	#0xFC008008, %a1
+	move.l	#(CFG_CS0_CTRL), (%a1)
+	move.l	#0xFC008004, %a1
+	move.l	#(CFG_CS0_MASK), (%a1)
+
+	/*
+	 * Dram Initialization
+	 * a1, a2, and d0
+	 */
+	/* mscr sdram */
+	move.l	#0xFC0A4074, %a1
+	move.b	#(CFG_SDRAM_DRV_STRENGTH), (%a1)
+	nop
+
+	/* SDRAM Chip 0 and 1 */
+	move.l	#0xFC0B8110, %a1
+	move.l	#0xFC0B8114, %a2
+
+	/* calculate the size */
+	move.l	#0x13, %d1
+	move.l	#(CFG_SDRAM_SIZE), %d2
+#ifdef CFG_SDRAM_BASE1
+	lsr.l	#1, %d2
+#endif
+
+dramsz_loop:
+	lsr.l	#1, %d2
+	add.l	#1, %d1
+	cmp.l	#1, %d2
+	bne	dramsz_loop
+
+	/* SDRAM Chip 0 and 1 */
+	move.l	#(CFG_SDRAM_BASE), (%a1)
+	or.l	%d1, (%a1)
+#ifdef CFG_SDRAM_BASE1
+	move.l	#(CFG_SDRAM_BASE1), (%a2)
+	or.l	%d1, (%a2)
+#endif
+	nop
+
+	/* dram cfg1 and cfg2 */
+	move.l	#0xFC0B8008, %a1
+	move.l	#(CFG_SDRAM_CFG1), (%a1)
+	nop
+	move.l	#0xFC0B800C, %a2
+	move.l	#(CFG_SDRAM_CFG2), (%a2)
+	nop
+
+	move.l	#0xFC0B8000, %a1	/* Mode */
+	move.l	#0xFC0B8004, %a2	/* Ctrl */
+
+#ifdef CONFIG_M54455EVB
+	/* Issue PALL */
+	move.l	#(CFG_SDRAM_CTRL + 2), (%a2)
+	nop
+
+	/* Issue LEMR */
+	move.l	#(CFG_SDRAM_EMOD + 0x408), (%a1)
+	nop
+	move.l	#(CFG_SDRAM_MODE + 0x300), (%a1)
+	nop
+
+	move.l	#1000, %d0
+wait1000:
+	nop
+	subq.l	#1, %d0
+	bne	wait1000
+#endif
+
+	/* Issue PALL */
+	move.l	#(CFG_SDRAM_CTRL + 2), (%a2)
+	nop
+
+	/* Perform two refresh cycles */
+	move.l	#(CFG_SDRAM_CTRL + 4), %d0
+	nop
+	move.l	%d0, (%a2)
+	move.l	%d0, (%a2)
+	nop
 
+#ifdef CONFIG_M54455EVB
+	move.l	#(CFG_SDRAM_MODE + 0x200), (%a1)
+	nop
+#elif defined(CONFIG_M54451EVB)
+	/* Issue LEMR */
+	move.l	#(CFG_SDRAM_MODE), (%a2)
+	nop
+	move.l	#(CFG_SDRAM_EMOD), (%a2)
+	nop
+#endif
+
+	move.l	#500, %d0
+wait500:
+	nop
+	subq.l	#1, %d0
+	bne	wait500
+
+	move.l	#(CFG_SDRAM_CTRL), %d0
+	and.l	#0x7FFFFFFF, %d0
+#ifdef CONFIG_M54455EVB
+	or.l	#0x10000c00, %d0
+#elif defined(CONFIG_M54451EVB)
+	or.l	#0x10000000, %d0
+#endif
+	move.l	%d0, (%a2)
+	nop
+
+	/*
+	 * DSPI Initialization
+	 * a0 - general, sram - 0x80008000 - 32, see M54455EVB.h
+	 * a1 - dspi status
+	 * a2 - dtfr
+	 * a3 - drfr
+	 * a4 - Dst addr
+	 */
+	/* Enable pins for DSPI mode - chip-selects are enabled later */
+	move.l	#0xFC0A4063, %a0
+	move.b	#0x7F, (%a0)
+
+	/* Configure DSPI module */
+	move.l	#0xFC05C000, %a0
+	move.l	#0x80FF0C00, (%a0)	/* Master, clear TX/RX FIFO */
+
+	move.l	#0xFC05C00C, %a0
+	move.l	#0x3E000011, (%a0)
+
+	move.l	#0xFC05C034, %a2	/* dtfr */
+	move.l	#0xFC05C03B, %a3	/* drfr */
+
+	move.l	#(ASM_SBF_IMG_HDR + 4), %a1
+	move.l	(%a1)+, %d5
+	move.l	(%a1), %a4
+
+	move.l	#(CFG_INIT_RAM_ADDR + CFG_SBFHDR_DATA_OFFSET), %a0
+	move.l	#(CFG_SBFHDR_SIZE), %d4
+
+	move.l	#0xFC05C02C, %a1	/* dspi status */
+
+	/* Issue commands and address */
+	move.l	#0x8002000B, %d2	/* Fast Read Cmd */
+	jsr	asm_dspi_wr_status
+	jsr	asm_dspi_rd_status
+
+	move.l	#0x80020000, %d2	/* Address byte 2 */
+	jsr	asm_dspi_wr_status
+	jsr	asm_dspi_rd_status
+
+	move.l	#0x80020000, %d2	/* Address byte 1 */
+	jsr	asm_dspi_wr_status
+	jsr	asm_dspi_rd_status
+
+	move.l	#0x80020000, %d2	/* Address byte 0 */
+	jsr	asm_dspi_wr_status
+	jsr	asm_dspi_rd_status
+
+	move.l	#0x80020000, %d2	/* Dummy Wr and Rd */
+	jsr	asm_dspi_wr_status
+	jsr	asm_dspi_rd_status
+
+	/* Transfer serial boot header to sram */
+asm_dspi_rd_loop1:
+	move.l	#0x80020000, %d2
+	jsr	asm_dspi_wr_status
+	jsr	asm_dspi_rd_status
+
+	move.b	%d1, (%a0)		/* read, copy to dst */
+
+	add.l	#1, %a0			/* inc dst by 1 */
+	sub.l	#1, %d4			/* dec cnt by 1 */
+	bne	asm_dspi_rd_loop1
+
+	/* Transfer u-boot from serial flash to memory */
+asm_dspi_rd_loop2:
+	move.l	#0x80020000, %d2
+	jsr	asm_dspi_wr_status
+	jsr	asm_dspi_rd_status
+
+	move.b	%d1, (%a4)		/* read, copy to dst */
+
+	add.l	#1, %a4			/* inc dst by 1 */
+	sub.l	#1, %d5			/* dec cnt by 1 */
+	bne	asm_dspi_rd_loop2
+
+	move.l	#0x00020000, %d2	/* Terminate */
+	jsr	asm_dspi_wr_status
+	jsr	asm_dspi_rd_status
+
+	/* jump to memory and execute */
+	move.l	#(TEXT_BASE + 0x400), %a0
+	jmp	(%a0)
+
+asm_dspi_wr_status:
+	move.l	(%a1), %d0		/* status */
+	and.l	#0x0000F000, %d0
+	cmp.l	#0x00003000, %d0
+	bgt	asm_dspi_wr_status
+
+	move.l	%d2, (%a2)
+	rts
+
+asm_dspi_rd_status:
+	move.l	(%a1), %d0		/* status */
+	and.l	#0x000000F0, %d0
+	lsr.l	#4, %d0
+	cmp.l	#0, %d0
+	beq	asm_dspi_rd_status
+
+	move.b	(%a3), %d1
+	rts
+#endif			/* CONFIG_CF_SBF */
+
+	.text
+	. = 0x400
 	.globl	_start
 _start:
 	nop
@@ -132,11 +377,16 @@ _start:
 	move.w #0x2700,%sr		/* Mask off Interrupt */
 
 	/* Set vector base register at the beginning of the Flash */
+#if defined(CONFIG_CF_SBF)
+	move.l	#TEXT_BASE, %d0
+	movec	%d0, %VBR
+#else
 	move.l	#CFG_FLASH_BASE, %d0
 	movec	%d0, %VBR
 
 	move.l	#(CFG_INIT_RAM_ADDR + CFG_INIT_RAM_CTRL), %d0
 	movec	%d0, %RAMBAR1
+#endif
 
 	/* initialize general use internal ram */
 	move.l #0, %d0