board/cirrus/edb93xx/edb93xx.c - platform/external/u-boot - Gitiles

 /*
  * Board initialization for EP93xx
  *
  * Copyright (C) 2013
  * Sergey Kostanbaev <sergey.kostanbaev <at> fairwaves.ru>
  *
  * Copyright (C) 2009
  * Matthias Kaehlcke <matthias <at> kaehlcke.net>
  *
  * (C) Copyright 2002 2003
  * Network Audio Technologies, Inc. <www.netaudiotech.com>
  * Adam Bezanson <bezanson <at> netaudiotech.com>
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */

 #include <config.h>
 #include <common.h>
 #include <netdev.h>
 #include <asm/io.h>
 #include <asm/arch/ep93xx.h>

 DECLARE_GLOBAL_DATA_PTR;

 /*
  * usb_div: 4, nbyp2: 1, pll2_en: 1
  * pll2_x1: 368640000.000000, pll2_x2ip: 15360000.000000,
  * pll2_x2: 384000000.000000, pll2_out: 192000000.000000
  */
 #define CLKSET2_VAL	(23 << SYSCON_CLKSET_PLL_X2IPD_SHIFT |	\
 			24 << SYSCON_CLKSET_PLL_X2FBD2_SHIFT |	\
 			24 << SYSCON_CLKSET_PLL_X1FBD1_SHIFT |	\
 			1 << SYSCON_CLKSET_PLL_PS_SHIFT |	\
 			SYSCON_CLKSET2_PLL2_EN |		\
 			SYSCON_CLKSET2_NBYP2 |			\
 			3 << SYSCON_CLKSET2_USB_DIV_SHIFT)

 #define SMC_BCR6_VALUE	(2 << SMC_BCR_IDCY_SHIFT | 5 << SMC_BCR_WST1_SHIFT | \
 			SMC_BCR_BLE | 2 << SMC_BCR_WST2_SHIFT | \
 			1 << SMC_BCR_MW_SHIFT)

 /* delay execution before timers are initialized */
 static inline void early_udelay(uint32_t usecs)
 {
 	/* loop takes 4 cycles at 5.0ns (fastest case, running at 200MHz) */
 	register uint32_t loops = (usecs * 1000) / 20;

 	__asm__ volatile ("1:\n"
 			"subs %0, %1, #1\n"
 			"bne 1b" : "=r" (loops) : "0" (loops));
 }

 #ifndef CONFIG_EP93XX_NO_FLASH_CFG
 static void flash_cfg(void)
 {
 	struct smc_regs *smc = (struct smc_regs *)SMC_BASE;

 	writel(SMC_BCR6_VALUE, &smc->bcr6);
 }
 #else
 #define flash_cfg()
 #endif

 int board_init(void)
 {
 	/*
 	 * Setup PLL2, PPL1 has been set during lowlevel init
 	 */
 	struct syscon_regs *syscon = (struct syscon_regs *)SYSCON_BASE;
 	writel(CLKSET2_VAL, &syscon->clkset2);

 	/*
 	 * the user's guide recommends to wait at least 1 ms for PLL2 to
 	 * stabilize
 	 */
 	early_udelay(1000);

 	/* Go to Async mode */
 	__asm__ volatile ("mrc p15, 0, r0, c1, c0, 0");
 	__asm__ volatile ("orr r0, r0, #0xc0000000");
 	__asm__ volatile ("mcr p15, 0, r0, c1, c0, 0");

 	icache_enable();

 #ifdef USE_920T_MMU
 	dcache_enable();
 #endif

 	/* Machine number, as defined in linux/arch/arm/tools/mach-types */
 	gd->bd->bi_arch_number = CONFIG_MACH_TYPE;

 	/* adress of boot parameters */
 	gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR;

 	/* We have a console */
 	gd->have_console = 1;

 	enable_interrupts();

 	flash_cfg();

 	green_led_on();
 	red_led_off();

 	return 0;
 }

 int board_early_init_f(void)
 {
 	/*
 	 * set UARTBAUD bit to drive UARTs with 14.7456MHz instead of
 	 * 14.7456/2 MHz
 	 */
 	struct syscon_regs *syscon = (struct syscon_regs *)SYSCON_BASE;
 	writel(SYSCON_PWRCNT_UART_BAUD, &syscon->pwrcnt);
 	return 0;
 }

 int board_eth_init(bd_t *bd)
 {
 	return ep93xx_eth_initialize(0, MAC_BASE);
 }

 static void dram_fill_bank_addr(unsigned dram_addr_mask, unsigned dram_bank_cnt,
 				unsigned dram_bank_base[CONFIG_NR_DRAM_BANKS])
 {
 	if (dram_bank_cnt == 1) {
 		dram_bank_base[0] = PHYS_SDRAM_1;
 	} else {
 		/* Table lookup for holes in address space. Maximum memory
 		 * for the single SDCS may be up to 256Mb. We start scanning
 		 * banks from 1Mb, so it could be up to 128 banks theoretically.
 		 * We need at maximum 7 bits for the loockup, 8 slots is
 		 * enough for the worst case.
 		 */
 		unsigned tbl[8];
 		unsigned i = dram_bank_cnt / 2;
 		unsigned j = 0x00100000; /* 1 Mb */
 		unsigned *ptbl = tbl;
 		do {
 			while (!(dram_addr_mask & j)) {
 				j <<= 1;
 			}
 			*ptbl++ = j;
 			j <<= 1;
 			i >>= 1;
 		} while (i != 0);

 		for (i = dram_bank_cnt, j = 0;
 		     (i != 0) && (j < CONFIG_NR_DRAM_BANKS); --i, ++j) {
 			unsigned addr = PHYS_SDRAM_1;
 			unsigned k;
 			unsigned bit;

 			for (k = 0, bit = 1; k < 8; k++, bit <<= 1) {
 				if (bit & j)
 					addr |= tbl[k];
 			}

 			dram_bank_base[j] = addr;
 		}
 	}
 }

 /* called in board_init_f (before relocation) */
 static unsigned dram_init_banksize_int(int print)
 {
 	/*
 	 * Collect information of banks that has been filled during lowlevel
 	 * initialization
 	 */
 	unsigned i;
 	unsigned dram_bank_base[CONFIG_NR_DRAM_BANKS];
 	unsigned dram_total = 0;
 	unsigned dram_bank_size = *(unsigned *)
 				  (PHYS_SDRAM_1 | UBOOT_MEMORYCNF_BANK_SIZE);
 	unsigned dram_addr_mask = *(unsigned *)
 				  (PHYS_SDRAM_1 | UBOOT_MEMORYCNF_BANK_MASK);
 	unsigned dram_bank_cnt = *(unsigned *)
 				 (PHYS_SDRAM_1 | UBOOT_MEMORYCNF_BANK_COUNT);

 	dram_fill_bank_addr(dram_addr_mask, dram_bank_cnt, dram_bank_base);

 	for (i = 0; i < dram_bank_cnt; i++) {
 		gd->bd->bi_dram[i].start = dram_bank_base[i];
 		gd->bd->bi_dram[i].size = dram_bank_size;
 		dram_total += dram_bank_size;
 	}
 	for (; i < CONFIG_NR_DRAM_BANKS; i++) {
 		gd->bd->bi_dram[i].start = 0;
 		gd->bd->bi_dram[i].size = 0;
 	}

 	if (print) {
 		printf("DRAM mask: %08x\n", dram_addr_mask);
 		printf("DRAM total %u banks:\n", dram_bank_cnt);
 		printf("bank          base-address          size\n");

 		if (dram_bank_cnt > CONFIG_NR_DRAM_BANKS) {
 			printf("WARNING! UBoot was configured for %u banks,\n"
 				"but %u has been found. "
 				"Supressing extra memory banks\n",
 				 CONFIG_NR_DRAM_BANKS, dram_bank_cnt);
 			dram_bank_cnt = CONFIG_NR_DRAM_BANKS;
 		}

 		for (i = 0; i < dram_bank_cnt; i++) {
 			printf("  %u             %08x            %08x\n",
 			       i, dram_bank_base[i], dram_bank_size);
 		}
 		printf("  ------------------------------------------\n"
 			"Total                              %9d\n\n",
 			dram_total);
 	}

 	return dram_total;
 }

 void dram_init_banksize(void)
 {
 	dram_init_banksize_int(0);
 }

 /* called in board_init_f (before relocation) */
 int dram_init(void)
 {
 	struct syscon_regs *syscon = (struct syscon_regs *)SYSCON_BASE;
 	unsigned sec_id = readl(SECURITY_EXTENSIONID);
 	unsigned chip_id = readl(&syscon->chipid);

 	printf("CPU: Cirrus Logic ");
 	switch (sec_id & 0x000001FE) {
 	case 0x00000008:
 		printf("EP9301");
 		break;
 	case 0x00000004:
 		printf("EP9307");
 		break;
 	case 0x00000002:
 		printf("EP931x");
 		break;
 	case 0x00000000:
 		printf("EP9315");
 		break;
 	default:
 		printf("<unknown>");
 		break;
 	}

 	printf(" - Rev. ");
 	switch (chip_id & 0xF0000000) {
 	case 0x00000000:
 		printf("A");
 		break;
 	case 0x10000000:
 		printf("B");
 		break;
 	case 0x20000000:
 		printf("C");
 		break;
 	case 0x30000000:
 		printf("D0");
 		break;
 	case 0x40000000:
 		printf("D1");
 		break;
 	case 0x50000000:
 		printf("E0");
 		break;
 	case 0x60000000:
 		printf("E1");
 		break;
 	case 0x70000000:
 		printf("E2");
 		break;
 	default:
 		printf("?");
 		break;
 	}
 	printf(" (SecExtID=%.8x/ChipID=%.8x)\n", sec_id, chip_id);

 	gd->ram_size = dram_init_banksize_int(1);
 	return 0;
 }
	/*
	* Board initialization for EP93xx
	*
	* Copyright (C) 2013
	* Sergey Kostanbaev <sergey.kostanbaev <at> fairwaves.ru>
	*
	* Copyright (C) 2009
	* Matthias Kaehlcke <matthias <at> kaehlcke.net>
	*
	* (C) Copyright 2002 2003
	* Network Audio Technologies, Inc. <www.netaudiotech.com>
	* Adam Bezanson <bezanson <at> netaudiotech.com>
	*
	* SPDX-License-Identifier: GPL-2.0+
	*/

	#include <config.h>
	#include <common.h>
	#include <netdev.h>
	#include <asm/io.h>
	#include <asm/arch/ep93xx.h>

	DECLARE_GLOBAL_DATA_PTR;

	/*
	* usb_div: 4, nbyp2: 1, pll2_en: 1
	* pll2_x1: 368640000.000000, pll2_x2ip: 15360000.000000,
	* pll2_x2: 384000000.000000, pll2_out: 192000000.000000
	*/
	#define CLKSET2_VAL (23 << SYSCON_CLKSET_PLL_X2IPD_SHIFT \| \
	24 << SYSCON_CLKSET_PLL_X2FBD2_SHIFT \| \
	24 << SYSCON_CLKSET_PLL_X1FBD1_SHIFT \| \
	1 << SYSCON_CLKSET_PLL_PS_SHIFT \| \
	SYSCON_CLKSET2_PLL2_EN \| \
	SYSCON_CLKSET2_NBYP2 \| \
	3 << SYSCON_CLKSET2_USB_DIV_SHIFT)

	#define SMC_BCR6_VALUE (2 << SMC_BCR_IDCY_SHIFT \| 5 << SMC_BCR_WST1_SHIFT \| \
	SMC_BCR_BLE \| 2 << SMC_BCR_WST2_SHIFT \| \
	1 << SMC_BCR_MW_SHIFT)

	/* delay execution before timers are initialized */
	static inline void early_udelay(uint32_t usecs)
	{
	/* loop takes 4 cycles at 5.0ns (fastest case, running at 200MHz) */
	register uint32_t loops = (usecs * 1000) / 20;

	__asm__ volatile ("1:\n"
	"subs %0, %1, #1\n"
	"bne 1b" : "=r" (loops) : "0" (loops));
	}

	#ifndef CONFIG_EP93XX_NO_FLASH_CFG
	static void flash_cfg(void)
	{
	struct smc_regs smc = (struct smc_regs )SMC_BASE;

	writel(SMC_BCR6_VALUE, &smc->bcr6);
	}
	#else
	#define flash_cfg()
	#endif

	int board_init(void)
	{
	/*
	* Setup PLL2, PPL1 has been set during lowlevel init
	*/
	struct syscon_regs syscon = (struct syscon_regs )SYSCON_BASE;
	writel(CLKSET2_VAL, &syscon->clkset2);

	/*
	* the user's guide recommends to wait at least 1 ms for PLL2 to
	* stabilize
	*/
	early_udelay(1000);

	/* Go to Async mode */
	__asm__ volatile ("mrc p15, 0, r0, c1, c0, 0");
	__asm__ volatile ("orr r0, r0, #0xc0000000");
	__asm__ volatile ("mcr p15, 0, r0, c1, c0, 0");

	icache_enable();

	#ifdef USE_920T_MMU
	dcache_enable();
	#endif

	/* Machine number, as defined in linux/arch/arm/tools/mach-types */
	gd->bd->bi_arch_number = CONFIG_MACH_TYPE;

	/* adress of boot parameters */
	gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR;

	/* We have a console */
	gd->have_console = 1;

	enable_interrupts();

	flash_cfg();

	green_led_on();
	red_led_off();

	return 0;
	}

	int board_early_init_f(void)
	{
	/*
	* set UARTBAUD bit to drive UARTs with 14.7456MHz instead of
	* 14.7456/2 MHz
	*/
	struct syscon_regs syscon = (struct syscon_regs )SYSCON_BASE;
	writel(SYSCON_PWRCNT_UART_BAUD, &syscon->pwrcnt);
	return 0;
	}

	int board_eth_init(bd_t *bd)
	{
	return ep93xx_eth_initialize(0, MAC_BASE);
	}

	static void dram_fill_bank_addr(unsigned dram_addr_mask, unsigned dram_bank_cnt,
	unsigned dram_bank_base[CONFIG_NR_DRAM_BANKS])
	{
	if (dram_bank_cnt == 1) {
	dram_bank_base[0] = PHYS_SDRAM_1;
	} else {
	/* Table lookup for holes in address space. Maximum memory
	* for the single SDCS may be up to 256Mb. We start scanning
	* banks from 1Mb, so it could be up to 128 banks theoretically.
	* We need at maximum 7 bits for the loockup, 8 slots is
	* enough for the worst case.
	*/
	unsigned tbl[8];
	unsigned i = dram_bank_cnt / 2;
	unsigned j = 0x00100000; /* 1 Mb */
	unsigned *ptbl = tbl;
	do {
	while (!(dram_addr_mask & j)) {
	j <<= 1;
	}
	*ptbl++ = j;
	j <<= 1;
	i >>= 1;
	} while (i != 0);

	for (i = dram_bank_cnt, j = 0;
	(i != 0) && (j < CONFIG_NR_DRAM_BANKS); --i, ++j) {
	unsigned addr = PHYS_SDRAM_1;
	unsigned k;
	unsigned bit;

	for (k = 0, bit = 1; k < 8; k++, bit <<= 1) {
	if (bit & j)
	addr \|= tbl[k];
	}

	dram_bank_base[j] = addr;
	}
	}
	}

	/* called in board_init_f (before relocation) */
	static unsigned dram_init_banksize_int(int print)
	{
	/*
	* Collect information of banks that has been filled during lowlevel
	* initialization
	*/
	unsigned i;
	unsigned dram_bank_base[CONFIG_NR_DRAM_BANKS];
	unsigned dram_total = 0;
	unsigned dram_bank_size = (unsigned )
	(PHYS_SDRAM_1 \| UBOOT_MEMORYCNF_BANK_SIZE);
	unsigned dram_addr_mask = (unsigned )
	(PHYS_SDRAM_1 \| UBOOT_MEMORYCNF_BANK_MASK);
	unsigned dram_bank_cnt = (unsigned )
	(PHYS_SDRAM_1 \| UBOOT_MEMORYCNF_BANK_COUNT);

	dram_fill_bank_addr(dram_addr_mask, dram_bank_cnt, dram_bank_base);

	for (i = 0; i < dram_bank_cnt; i++) {
	gd->bd->bi_dram[i].start = dram_bank_base[i];
	gd->bd->bi_dram[i].size = dram_bank_size;
	dram_total += dram_bank_size;
	}
	for (; i < CONFIG_NR_DRAM_BANKS; i++) {
	gd->bd->bi_dram[i].start = 0;
	gd->bd->bi_dram[i].size = 0;
	}

	if (print) {
	printf("DRAM mask: %08x\n", dram_addr_mask);
	printf("DRAM total %u banks:\n", dram_bank_cnt);
	printf("bank base-address size\n");

	if (dram_bank_cnt > CONFIG_NR_DRAM_BANKS) {
	printf("WARNING! UBoot was configured for %u banks,\n"
	"but %u has been found. "
	"Supressing extra memory banks\n",
	CONFIG_NR_DRAM_BANKS, dram_bank_cnt);
	dram_bank_cnt = CONFIG_NR_DRAM_BANKS;
	}

	for (i = 0; i < dram_bank_cnt; i++) {
	printf(" %u %08x %08x\n",
	i, dram_bank_base[i], dram_bank_size);
	}
	printf(" ------------------------------------------\n"
	"Total %9d\n\n",
	dram_total);
	}

	return dram_total;
	}

	void dram_init_banksize(void)
	{
	dram_init_banksize_int(0);
	}

	/* called in board_init_f (before relocation) */
	int dram_init(void)
	{
	struct syscon_regs syscon = (struct syscon_regs )SYSCON_BASE;
	unsigned sec_id = readl(SECURITY_EXTENSIONID);
	unsigned chip_id = readl(&syscon->chipid);

	printf("CPU: Cirrus Logic ");
	switch (sec_id & 0x000001FE) {
	case 0x00000008:
	printf("EP9301");
	break;
	case 0x00000004:
	printf("EP9307");
	break;
	case 0x00000002:
	printf("EP931x");
	break;
	case 0x00000000:
	printf("EP9315");
	break;
	default:
	printf("<unknown>");
	break;
	}

	printf(" - Rev. ");
	switch (chip_id & 0xF0000000) {
	case 0x00000000:
	printf("A");
	break;
	case 0x10000000:
	printf("B");
	break;
	case 0x20000000:
	printf("C");
	break;
	case 0x30000000:
	printf("D0");
	break;
	case 0x40000000:
	printf("D1");
	break;
	case 0x50000000:
	printf("E0");
	break;
	case 0x60000000:
	printf("E1");
	break;
	case 0x70000000:
	printf("E2");
	break;
	default:
	printf("?");
	break;
	}
	printf(" (SecExtID=%.8x/ChipID=%.8x)\n", sec_id, chip_id);

	gd->ram_size = dram_init_banksize_int(1);
	return 0;
	}