arm: ep9315: Return back Cirrus Logic EDB9315A board support

This patch returns back support for old ep93xx processors family

Signed-off-by: Sergey Kostanbaev <sergey.kostanbaev@gmail.com>
Cc: albert.u.boot@aribaud.net

3 files changed, 508 insertions, 0 deletions

diff --git a/board/cirrus/edb93xx/Makefile b/board/cirrus/edb93xx/Makefile
new file mode 100644
index 0000000000..d03c498478
--- /dev/null
+++ b/board/cirrus/edb93xx/Makefile
@@ -0,0 +1,11 @@
+#
+# (C) Copyright 2013
+# Sergey Kostanbaev <sergey.kostanbaev <at> fairwaves.ru>
+#
+# (C) Copyright 2003-2006
+# Wolfgang Denk, DENX Software Engineering, wd <at> denx.de.
+#
+# * SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y	:= edb93xx.o
diff --git a/board/cirrus/edb93xx/edb93xx.c b/board/cirrus/edb93xx/edb93xx.c
new file mode 100644
index 0000000000..8963d3a582
--- /dev/null
+++ b/board/cirrus/edb93xx/edb93xx.c
@@ -0,0 +1,382 @@
+/*
+ * 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;
+}
+
+
+#ifdef CONFIG_EP93XX_SPI
+#include <spi.h>
+
+/*
+ * EGIO0-EGIPO7 -> port A
+ * EGIO8-EGIP15 -> port B
+ */
+
+static void ep93xx_set_epgio(unsigned num)
+{
+	struct gpio_regs *regs = (struct gpio_regs *)GPIO_BASE;
+	if (num < 8)
+		writel(readl(&regs->padr) | (1<<num), &regs->padr);
+	else
+		writel(readl(&regs->pbdr) | (1<<(num-8)), &regs->pbdr);
+}
+
+static void ep93xx_clear_epgio(unsigned num)
+{
+	struct gpio_regs *regs = (struct gpio_regs *)GPIO_BASE;
+	if (num < 8)
+		writel(readl(&regs->padr) & (~(1<<num)), &regs->padr);
+	else
+		writel(readl(&regs->pbdr) & (~(1<<(num-8))), &regs->pbdr);
+}
+
+static void ep93xx_dir_epgio_out(unsigned num)
+{
+	struct gpio_regs *regs = (struct gpio_regs *)GPIO_BASE;
+	if (num < 8)
+		writel(readl(&regs->paddr) | (1<<num), &regs->paddr);
+	else
+		writel(readl(&regs->pbddr) | (1<<(num-8)), &regs->pbddr);
+}
+
+int spi_cs_is_valid(unsigned int bus, unsigned int cs)
+{
+	if (bus == 0 && cs < 16)
+		return 1;
+
+	return 0;
+}
+
+void spi_cs_activate(struct spi_slave *slave)
+{
+	ep93xx_clear_epgio(slave->cs);
+}
+
+void spi_cs_deactivate(struct spi_slave *slave)
+{
+	ep93xx_set_epgio(slave->cs);
+}
+
+#ifdef CONFIG_MMC_SPI
+#include <mmc.h>
+
+#ifndef CONFIG_MMC_SPI_CS_EPGIO
+# define CONFIG_MMC_SPI_CS_EPGIO	4
+#endif
+
+#ifndef CONFIG_MMC_SPI_SPEED
+# define CONFIG_MMC_SPI_SPEED		25000000
+#endif
+
+#ifndef CONFIG_MMC_SPI_MODE
+# define CONFIG_MMC_SPI_MODE		SPI_MODE_0
+#endif
+
+int board_mmc_init(bd_t *bis)
+{
+	struct gpio_regs *regs = (struct gpio_regs *)GPIO_BASE;
+
+	ep93xx_set_epgio(CONFIG_MMC_SPI_CS_EPGIO);
+	ep93xx_dir_epgio_out(CONFIG_MMC_SPI_CS_EPGIO);
+
+#ifdef CONFIG_MMC_SPI_POWER_EGPIO
+	ep93xx_dir_epgio_out(CONFIG_MMC_SPI_POWER_EGPIO);
+	ep93xx_set_epgio(CONFIG_MMC_SPI_POWER_EGPIO);
+#elif defined(CONFIG_MMC_SPI_NPOWER_EGPIO)
+	ep93xx_dir_epgio_out(CONFIG_MMC_SPI_NPOWER_EGPIO);
+	ep93xx_clear_epgio(CONFIG_MMC_SPI_NPOWER_EGPIO);
+#endif
+	struct mmc *mmc = mmc_spi_init(0, CONFIG_MMC_SPI_CS_EPGIO,
+				CONFIG_MMC_SPI_SPEED, CONFIG_MMC_SPI_MODE);
+
+	if (!mmc) {
+		printf("Failed to create MMC Device\n");
+		return 1;
+	}
+	mmc_init(mmc);
+	return 0;
+}
+
+
+#endif /* CONFIG_MMC_SPI */
+#endif /* CONFIG_EP93XX_SPI */
diff --git a/board/cirrus/edb93xx/u-boot.lds b/board/cirrus/edb93xx/u-boot.lds
new file mode 100644
index 0000000000..b0d892a59f
--- /dev/null
+++ b/board/cirrus/edb93xx/u-boot.lds
@@ -0,0 +1,115 @@
+/*
+ *
+ * Copyright (C) 2013
+ * Sergey Kostanbaev <sergey.kostanbaev <at> fairwaves.ru>
+ *
+ * Copyright (c) 2004-2008 Texas Instruments
+ *
+ * (C) Copyright 2002
+ * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+ENTRY(_start)
+SECTIONS
+{
+	. = 0x00000000;
+
+	. = ALIGN(4);
+	.text : {
+		*(.__image_copy_start)
+		arch/arm/cpu/arm920t/start.o (.text*)
+		. = 0x1000;
+
+		LONG(0x53555243)
+		*(.text*)
+	}
+
+	. = ALIGN(4);
+	.rodata : { *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*))) }
+
+	. = ALIGN(4);
+	.data : {
+		*(.data*)
+	}
+
+	. = ALIGN(4);
+
+	. = .;
+
+	. = ALIGN(4);
+	.u_boot_list : {
+		KEEP(*(SORT(.u_boot_list*)));
+	}
+
+	. = ALIGN(4);
+
+	.image_copy_end :
+	{
+		*(.__image_copy_end)
+	}
+
+	.rel_dyn_start :
+	{
+		*(.__rel_dyn_start)
+	}
+
+	.rel.dyn : {
+		*(.rel*)
+	}
+
+	.rel_dyn_end :
+	{
+		*(.__rel_dyn_end)
+	}
+
+	.end :
+	{
+		*(.__end)
+	}
+
+	_image_binary_end = .;
+
+	/*
+	 * Deprecated: this MMU section is used by pxa at present but
+	 * should not be used by new boards/CPUs.
+	 */
+	. = ALIGN(4096);
+	.mmutable : {
+		*(.mmutable)
+	}
+
+/*
+ * Compiler-generated __bss_start and __bss_end, see arch/arm/lib/bss.c
+ * __bss_base and __bss_limit are for linker only (overlay ordering)
+ */
+
+	.bss_start __rel_dyn_start (OVERLAY) : {
+		KEEP(*(.__bss_start));
+		__bss_base = .;
+	}
+
+	.bss __bss_base (OVERLAY) : {
+		*(.bss*)
+		 . = ALIGN(4);
+		 __bss_limit = .;
+	}
+
+	.bss_end __bss_limit (OVERLAY) : {
+		KEEP(*(.__bss_end));
+	}
+
+	.dynsym _image_binary_end : { *(.dynsym) }
+	.dynbss : { *(.dynbss) }
+	.dynstr : { *(.dynstr*) }
+	.dynamic : { *(.dynamic*) }
+	.plt : { *(.plt*) }
+	.interp : { *(.interp*) }
+	.gnu.hash : { *(.gnu.hash) }
+	.gnu : { *(.gnu*) }
+	.ARM.exidx : { *(.ARM.exidx*) }
+	.gnu.linkonce.armexidx : { *(.gnu.linkonce.armexidx.*) }
+}