290 lines
6.6 KiB
C
290 lines
6.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Board initialization for EP93xx
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*
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* Copyright (C) 2013
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* Sergey Kostanbaev <sergey.kostanbaev <at> fairwaves.ru>
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*
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* Copyright (C) 2009
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* Matthias Kaehlcke <matthias <at> kaehlcke.net>
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*
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* (C) Copyright 2002 2003
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* Network Audio Technologies, Inc. <www.netaudiotech.com>
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* Adam Bezanson <bezanson <at> netaudiotech.com>
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*/
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#include <config.h>
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#include <common.h>
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#include <cpu_func.h>
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#include <irq_func.h>
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#include <netdev.h>
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#include <status_led.h>
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#include <asm/io.h>
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#include <asm/mach-types.h>
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#include <asm/arch/ep93xx.h>
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DECLARE_GLOBAL_DATA_PTR;
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/*
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* usb_div: 4, nbyp2: 1, pll2_en: 1
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* pll2_x1: 368640000.000000, pll2_x2ip: 15360000.000000,
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* pll2_x2: 384000000.000000, pll2_out: 192000000.000000
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*/
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#define CLKSET2_VAL (23 << SYSCON_CLKSET_PLL_X2IPD_SHIFT | \
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24 << SYSCON_CLKSET_PLL_X2FBD2_SHIFT | \
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24 << SYSCON_CLKSET_PLL_X1FBD1_SHIFT | \
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1 << SYSCON_CLKSET_PLL_PS_SHIFT | \
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SYSCON_CLKSET2_PLL2_EN | \
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SYSCON_CLKSET2_NBYP2 | \
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3 << SYSCON_CLKSET2_USB_DIV_SHIFT)
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#define SMC_BCR6_VALUE (2 << SMC_BCR_IDCY_SHIFT | 5 << SMC_BCR_WST1_SHIFT | \
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SMC_BCR_BLE | 2 << SMC_BCR_WST2_SHIFT | \
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1 << SMC_BCR_MW_SHIFT)
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/* delay execution before timers are initialized */
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static inline void early_udelay(uint32_t usecs)
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{
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/* loop takes 4 cycles at 5.0ns (fastest case, running at 200MHz) */
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register uint32_t loops = (usecs * 1000) / 20;
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__asm__ volatile ("1:\n"
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"subs %0, %1, #1\n"
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"bne 1b" : "=r" (loops) : "0" (loops));
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}
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#ifndef CONFIG_EP93XX_NO_FLASH_CFG
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static void flash_cfg(void)
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{
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struct smc_regs *smc = (struct smc_regs *)SMC_BASE;
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writel(SMC_BCR6_VALUE, &smc->bcr6);
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}
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#else
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#define flash_cfg()
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#endif
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int board_init(void)
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{
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/*
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* Setup PLL2, PPL1 has been set during lowlevel init
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*/
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struct syscon_regs *syscon = (struct syscon_regs *)SYSCON_BASE;
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writel(CLKSET2_VAL, &syscon->clkset2);
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/*
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* the user's guide recommends to wait at least 1 ms for PLL2 to
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* stabilize
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*/
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early_udelay(1000);
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/* Go to Async mode */
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__asm__ volatile ("mrc p15, 0, r0, c1, c0, 0");
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__asm__ volatile ("orr r0, r0, #0xc0000000");
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__asm__ volatile ("mcr p15, 0, r0, c1, c0, 0");
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icache_enable();
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#ifdef USE_920T_MMU
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dcache_enable();
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#endif
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/* Machine number, as defined in linux/arch/arm/tools/mach-types */
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gd->bd->bi_arch_number = CONFIG_MACH_TYPE;
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/* adress of boot parameters */
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gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR;
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/* We have a console */
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gd->have_console = 1;
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enable_interrupts();
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flash_cfg();
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green_led_on();
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red_led_off();
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return 0;
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}
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int board_early_init_f(void)
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{
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/*
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* set UARTBAUD bit to drive UARTs with 14.7456MHz instead of
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* 14.7456/2 MHz
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*/
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struct syscon_regs *syscon = (struct syscon_regs *)SYSCON_BASE;
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writel(SYSCON_PWRCNT_UART_BAUD, &syscon->pwrcnt);
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return 0;
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}
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int board_eth_init(bd_t *bd)
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{
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return ep93xx_eth_initialize(0, MAC_BASE);
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}
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static void dram_fill_bank_addr(unsigned dram_addr_mask, unsigned dram_bank_cnt,
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unsigned dram_bank_base[CONFIG_NR_DRAM_BANKS])
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{
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if (dram_bank_cnt == 1) {
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dram_bank_base[0] = PHYS_SDRAM_1;
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} else {
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/* Table lookup for holes in address space. Maximum memory
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* for the single SDCS may be up to 256Mb. We start scanning
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* banks from 1Mb, so it could be up to 128 banks theoretically.
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* We need at maximum 7 bits for the loockup, 8 slots is
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* enough for the worst case.
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*/
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unsigned tbl[8];
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unsigned i = dram_bank_cnt / 2;
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unsigned j = 0x00100000; /* 1 Mb */
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unsigned *ptbl = tbl;
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do {
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while (!(dram_addr_mask & j)) {
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j <<= 1;
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}
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*ptbl++ = j;
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j <<= 1;
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i >>= 1;
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} while (i != 0);
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for (i = dram_bank_cnt, j = 0;
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(i != 0) && (j < CONFIG_NR_DRAM_BANKS); --i, ++j) {
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unsigned addr = PHYS_SDRAM_1;
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unsigned k;
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unsigned bit;
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for (k = 0, bit = 1; k < 8; k++, bit <<= 1) {
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if (bit & j)
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addr |= tbl[k];
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}
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dram_bank_base[j] = addr;
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}
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}
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}
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/* called in board_init_f (before relocation) */
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static unsigned dram_init_banksize_int(int print)
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{
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/*
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* Collect information of banks that has been filled during lowlevel
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* initialization
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*/
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unsigned i;
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unsigned dram_bank_base[CONFIG_NR_DRAM_BANKS];
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unsigned dram_total = 0;
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unsigned dram_bank_size = *(unsigned *)
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(PHYS_SDRAM_1 | UBOOT_MEMORYCNF_BANK_SIZE);
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unsigned dram_addr_mask = *(unsigned *)
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(PHYS_SDRAM_1 | UBOOT_MEMORYCNF_BANK_MASK);
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unsigned dram_bank_cnt = *(unsigned *)
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(PHYS_SDRAM_1 | UBOOT_MEMORYCNF_BANK_COUNT);
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dram_fill_bank_addr(dram_addr_mask, dram_bank_cnt, dram_bank_base);
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for (i = 0; i < dram_bank_cnt; i++) {
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gd->bd->bi_dram[i].start = dram_bank_base[i];
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gd->bd->bi_dram[i].size = dram_bank_size;
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dram_total += dram_bank_size;
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}
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for (; i < CONFIG_NR_DRAM_BANKS; i++) {
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gd->bd->bi_dram[i].start = 0;
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gd->bd->bi_dram[i].size = 0;
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}
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if (print) {
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printf("DRAM mask: %08x\n", dram_addr_mask);
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printf("DRAM total %u banks:\n", dram_bank_cnt);
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printf("bank base-address size\n");
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if (dram_bank_cnt > CONFIG_NR_DRAM_BANKS) {
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printf("WARNING! UBoot was configured for %u banks,\n"
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"but %u has been found. "
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"Supressing extra memory banks\n",
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CONFIG_NR_DRAM_BANKS, dram_bank_cnt);
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dram_bank_cnt = CONFIG_NR_DRAM_BANKS;
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}
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for (i = 0; i < dram_bank_cnt; i++) {
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printf(" %u %08x %08x\n",
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i, dram_bank_base[i], dram_bank_size);
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}
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printf(" ------------------------------------------\n"
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"Total %9d\n\n",
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dram_total);
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}
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return dram_total;
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}
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int dram_init_banksize(void)
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{
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dram_init_banksize_int(0);
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return 0;
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}
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/* called in board_init_f (before relocation) */
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int dram_init(void)
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{
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struct syscon_regs *syscon = (struct syscon_regs *)SYSCON_BASE;
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unsigned sec_id = readl(SECURITY_EXTENSIONID);
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unsigned chip_id = readl(&syscon->chipid);
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printf("CPU: Cirrus Logic ");
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switch (sec_id & 0x000001FE) {
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case 0x00000008:
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printf("EP9301");
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break;
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case 0x00000004:
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printf("EP9307");
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break;
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case 0x00000002:
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printf("EP931x");
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break;
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case 0x00000000:
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printf("EP9315");
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break;
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default:
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printf("<unknown>");
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break;
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}
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printf(" - Rev. ");
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switch (chip_id & 0xF0000000) {
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case 0x00000000:
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printf("A");
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break;
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case 0x10000000:
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printf("B");
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break;
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case 0x20000000:
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printf("C");
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break;
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case 0x30000000:
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printf("D0");
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break;
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case 0x40000000:
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printf("D1");
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break;
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case 0x50000000:
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printf("E0");
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break;
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case 0x60000000:
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printf("E1");
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break;
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case 0x70000000:
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printf("E2");
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break;
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default:
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printf("?");
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break;
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}
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printf(" (SecExtID=%.8x/ChipID=%.8x)\n", sec_id, chip_id);
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gd->ram_size = dram_init_banksize_int(1);
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return 0;
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}
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