1 files changed, 396 insertions, 0 deletions
diff --git a/arch/arm/cpu/arm926ejs/kirkwood/cpu.c b/arch/arm/cpu/arm926ejs/kirkwood/cpu.c
new file mode 100644
index 0000000..fba5e01
--- /dev/null
+++ b/arch/arm/cpu/arm926ejs/kirkwood/cpu.c
@@ -0,0 +1,396 @@
+/*
+ * (C) Copyright 2009
+ * Marvell Semiconductor <www.marvell.com>
+ * Written-by: Prafulla Wadaskar <prafulla@marvell.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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 program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#include <common.h>
+#include <netdev.h>
+#include <asm/cache.h>
+#include <u-boot/md5.h>
+#include <asm/io.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/kirkwood.h>
+#include <hush.h>
+
+#define BUFLEN	16
+
+void reset_cpu(unsigned long ignored)
+{
+	struct kwcpu_registers *cpureg =
+	    (struct kwcpu_registers *)KW_CPU_REG_BASE;
+
+	writel(readl(&cpureg->rstoutn_mask) | (1 << 2),
+		&cpureg->rstoutn_mask);
+	writel(readl(&cpureg->sys_soft_rst) | 1,
+		&cpureg->sys_soft_rst);
+	while (1) ;
+}
+
+/*
+ * Generates Ramdom hex number reading some time varient system registers
+ * and using md5 algorithm
+ */
+unsigned char get_random_hex(void)
+{
+	int i;
+	u32 inbuf[BUFLEN];
+	u8 outbuf[BUFLEN];
+
+	/*
+	 * in case of 88F6281/88F6282/88F6192 A0,
+	 * Bit7 need to reset to generate random values in KW_REG_UNDOC_0x1470
+	 * Soc reg offsets KW_REG_UNDOC_0x1470 and KW_REG_UNDOC_0x1478 are
+	 * reserved regs and does not have names at this moment
+	 * (no errata available)
+	 */
+	writel(readl(KW_REG_UNDOC_0x1478) & ~(1 << 7), KW_REG_UNDOC_0x1478);
+	for (i = 0; i < BUFLEN; i++) {
+		inbuf[i] = readl(KW_REG_UNDOC_0x1470);
+	}
+	md5((u8 *) inbuf, (BUFLEN * sizeof(u32)), outbuf);
+	return outbuf[outbuf[7] % 0x0f];
+}
+
+/*
+ * Window Size
+ * Used with the Base register to set the address window size and location.
+ * Must be programmed from LSB to MSB as sequence of ones followed by
+ * sequence of zeros. The number of ones specifies the size of the window in
+ * 64 KByte granularity (e.g., a value of 0x00FF specifies 256 = 16 MByte).
+ * NOTE: A value of 0x0 specifies 64-KByte size.
+ */
+unsigned int kw_winctrl_calcsize(unsigned int sizeval)
+{
+	int i;
+	unsigned int j = 0;
+	u32 val = sizeval >> 1;
+
+	for (i = 0; val >= 0x10000; i++) {
+		j |= (1 << i);
+		val = val >> 1;
+	}
+	return (0x0000ffff & j);
+}
+
+/*
+ * kw_config_adr_windows - Configure address Windows
+ *
+ * There are 8 address windows supported by Kirkwood Soc to addess different
+ * devices. Each window can be configured for size, BAR and remap addr
+ * Below configuration is standard for most of the cases
+ *
+ * If remap function not used, remap_lo must be set as base
+ *
+ * Reference Documentation:
+ * Mbus-L to Mbus Bridge Registers Configuration.
+ * (Sec 25.1 and 25.3 of Datasheet)
+ */
+int kw_config_adr_windows(void)
+{
+	struct kwwin_registers *winregs =
+		(struct kwwin_registers *)KW_CPU_WIN_BASE;
+
+	/* Window 0: PCIE MEM address space */
+	writel(KWCPU_WIN_CTRL_DATA(1024 * 1024 * 256, KWCPU_TARGET_PCIE,
+		KWCPU_ATTR_PCIE_MEM, KWCPU_WIN_ENABLE), &winregs[0].ctrl);
+
+	writel(KW_DEFADR_PCI_MEM, &winregs[0].base);
+	writel(KW_DEFADR_PCI_MEM, &winregs[0].remap_lo);
+	writel(0x0, &winregs[0].remap_hi);
+
+	/* Window 1: PCIE IO address space */
+	writel(KWCPU_WIN_CTRL_DATA(1024 * 64, KWCPU_TARGET_PCIE,
+		KWCPU_ATTR_PCIE_IO, KWCPU_WIN_ENABLE), &winregs[1].ctrl);
+	writel(KW_DEFADR_PCI_IO, &winregs[1].base);
+	writel(KW_DEFADR_PCI_IO_REMAP, &winregs[1].remap_lo);
+	writel(0x0, &winregs[1].remap_hi);
+
+	/* Window 2: NAND Flash address space */
+	writel(KWCPU_WIN_CTRL_DATA(1024 * 1024 * 128, KWCPU_TARGET_MEMORY,
+		KWCPU_ATTR_NANDFLASH, KWCPU_WIN_ENABLE), &winregs[2].ctrl);
+	writel(KW_DEFADR_NANDF, &winregs[2].base);
+	writel(KW_DEFADR_NANDF, &winregs[2].remap_lo);
+	writel(0x0, &winregs[2].remap_hi);
+
+	/* Window 3: SPI Flash address space */
+	writel(KWCPU_WIN_CTRL_DATA(1024 * 1024 * 128, KWCPU_TARGET_MEMORY,
+		KWCPU_ATTR_SPIFLASH, KWCPU_WIN_ENABLE), &winregs[3].ctrl);
+	writel(KW_DEFADR_SPIF, &winregs[3].base);
+	writel(KW_DEFADR_SPIF, &winregs[3].remap_lo);
+	writel(0x0, &winregs[3].remap_hi);
+
+	/* Window 4: BOOT Memory address space */
+	writel(KWCPU_WIN_CTRL_DATA(1024 * 1024 * 128, KWCPU_TARGET_MEMORY,
+		KWCPU_ATTR_BOOTROM, KWCPU_WIN_ENABLE), &winregs[4].ctrl);
+	writel(KW_DEFADR_BOOTROM, &winregs[4].base);
+
+	/* Window 5: Security SRAM address space */
+	writel(KWCPU_WIN_CTRL_DATA(1024 * 64, KWCPU_TARGET_SASRAM,
+		KWCPU_ATTR_SASRAM, KWCPU_WIN_ENABLE), &winregs[5].ctrl);
+	writel(KW_DEFADR_SASRAM, &winregs[5].base);
+
+	/* Window 6-7: Disabled */
+	writel(KWCPU_WIN_DISABLE, &winregs[6].ctrl);
+	writel(KWCPU_WIN_DISABLE, &winregs[7].ctrl);
+
+	return 0;
+}
+
+/*
+ * kw_config_gpio - GPIO configuration
+ */
+void kw_config_gpio(u32 gpp0_oe_val, u32 gpp1_oe_val, u32 gpp0_oe, u32 gpp1_oe)
+{
+	struct kwgpio_registers *gpio0reg =
+		(struct kwgpio_registers *)KW_GPIO0_BASE;
+	struct kwgpio_registers *gpio1reg =
+		(struct kwgpio_registers *)KW_GPIO1_BASE;
+
+	/* Init GPIOS to default values as per board requirement */
+	writel(gpp0_oe_val, &gpio0reg->dout);
+	writel(gpp1_oe_val, &gpio1reg->dout);
+	writel(gpp0_oe, &gpio0reg->oe);
+	writel(gpp1_oe, &gpio1reg->oe);
+}
+
+/*
+ * kw_config_mpp - Multi-Purpose Pins Functionality configuration
+ *
+ * Each MPP can be configured to different functionality through
+ * MPP control register, ref (sec 6.1 of kirkwood h/w specification)
+ *
+ * There are maximum 64 Multi-Pourpose Pins on Kirkwood
+ * Each MPP functionality can be configuration by a 4bit value
+ * of MPP control reg, the value and associated functionality depends
+ * upon used SoC varient
+ */
+int kw_config_mpp(u32 mpp0_7, u32 mpp8_15, u32 mpp16_23, u32 mpp24_31,
+		u32 mpp32_39, u32 mpp40_47, u32 mpp48_55)
+{
+	u32 *mppreg = (u32 *) KW_MPP_BASE;
+
+	/* program mpp registers */
+	writel(mpp0_7, &mppreg[0]);
+	writel(mpp8_15, &mppreg[1]);
+	writel(mpp16_23, &mppreg[2]);
+	writel(mpp24_31, &mppreg[3]);
+	writel(mpp32_39, &mppreg[4]);
+	writel(mpp40_47, &mppreg[5]);
+	writel(mpp48_55, &mppreg[6]);
+	return 0;
+}
+
+/*
+ * SYSRSTn Duration Counter Support
+ *
+ * Kirkwood SoC implements a hardware-based SYSRSTn duration counter.
+ * When SYSRSTn is asserted low, a SYSRSTn duration counter is running.
+ * The SYSRSTn duration counter is useful for implementing a manufacturer
+ * or factory reset. Upon a long reset assertion that is greater than a
+ * pre-configured environment variable value for sysrstdelay,
+ * The counter value is stored in the SYSRSTn Length Counter Register
+ * The counter is based on the 25-MHz reference clock (40ns)
+ * It is a 29-bit counter, yielding a maximum counting duration of
+ * 2^29/25 MHz (21.4 seconds). When the counter reach its maximum value,
+ * it remains at this value until counter reset is triggered by setting
+ * bit 31 of KW_REG_SYSRST_CNT
+ */
+static void kw_sysrst_action(void)
+{
+	int ret;
+	char *s = getenv("sysrstcmd");
+
+	if (!s) {
+		debug("Error.. %s failed, check sysrstcmd\n",
+			__FUNCTION__);
+		return;
+	}
+
+	debug("Starting %s process...\n", __FUNCTION__);
+	ret = run_command(s, 0);
+	if (ret < 0)
+		debug("Error.. %s failed\n", __FUNCTION__);
+	else
+		debug("%s process finished\n", __FUNCTION__);
+}
+
+static void kw_sysrst_check(void)
+{
+	u32 sysrst_cnt, sysrst_dly;
+	char *s;
+
+	/*
+	 * no action if sysrstdelay environment variable is not defined
+	 */
+	s = getenv("sysrstdelay");
+	if (s == NULL)
+		return;
+
+	/* read sysrstdelay value */
+	sysrst_dly = (u32) simple_strtoul(s, NULL, 10);
+
+	/* read SysRst Length counter register (bits 28:0) */
+	sysrst_cnt = (0x1fffffff & readl(KW_REG_SYSRST_CNT));
+	debug("H/w Rst hold time: %d.%d secs\n",
+		sysrst_cnt / SYSRST_CNT_1SEC_VAL,
+		sysrst_cnt % SYSRST_CNT_1SEC_VAL);
+
+	/* clear the counter for next valid read*/
+	writel(1 << 31, KW_REG_SYSRST_CNT);
+
+	/*
+	 * sysrst_action:
+	 * if H/w Reset key is pressed and hold for time
+	 * more than sysrst_dly in seconds
+	 */
+	if (sysrst_cnt >= SYSRST_CNT_1SEC_VAL * sysrst_dly)
+		kw_sysrst_action();
+}
+
+#if defined(CONFIG_DISPLAY_CPUINFO)
+int print_cpuinfo(void)
+{
+	char *rev;
+	u16 devid = (readl(KW_REG_PCIE_DEVID) >> 16) & 0xffff;
+	u8 revid = readl(KW_REG_PCIE_REVID) & 0xff;
+
+	if ((readl(KW_REG_DEVICE_ID) & 0x03) > 2) {
+		printf("Error.. %s:Unsupported Kirkwood SoC 88F%04x\n", __FUNCTION__, devid);
+		return -1;
+	}
+
+	switch (revid) {
+	case 0:
+		rev = "Z0";
+		break;
+	case 2:
+		rev = "A0";
+		break;
+	case 3:
+		rev = "A1";
+		break;
+	default:
+		rev = "??";
+		break;
+	}
+
+	printf("SoC:   Kirkwood 88F%04x_%s\n", devid, rev);
+	return 0;
+}
+#endif /* CONFIG_DISPLAY_CPUINFO */
+
+#ifdef CONFIG_ARCH_CPU_INIT
+int arch_cpu_init(void)
+{
+	u32 reg;
+	struct kwcpu_registers *cpureg =
+		(struct kwcpu_registers *)KW_CPU_REG_BASE;
+
+	/* Linux expects` the internal registers to be at 0xf1000000 */
+	writel(KW_REGS_PHY_BASE, KW_OFFSET_REG);
+
+	/* Enable and invalidate L2 cache in write through mode */
+	writel(readl(&cpureg->l2_cfg) | 0x18, &cpureg->l2_cfg);
+	invalidate_l2_cache();
+
+	kw_config_adr_windows();
+
+#ifdef CONFIG_KIRKWOOD_RGMII_PAD_1V8
+	/*
+	 * Configures the I/O voltage of the pads connected to Egigabit
+	 * Ethernet interface to 1.8V
+	 * By defult it is set to 3.3V
+	 */
+	reg = readl(KW_REG_MPP_OUT_DRV_REG);
+	reg |= (1 << 7);
+	writel(reg, KW_REG_MPP_OUT_DRV_REG);
+#endif
+#ifdef CONFIG_KIRKWOOD_EGIGA_INIT
+	/*
+	 * Set egiga port0/1 in normal functional mode
+	 * This is required becasue on kirkwood by default ports are in reset mode
+	 * OS egiga driver may not have provision to set them in normal mode
+	 * and if u-boot is build without network support, network may fail at OS level
+	 */
+	reg = readl(KWGBE_PORT_SERIAL_CONTROL1_REG(0));
+	reg &= ~(1 << 4);	/* Clear PortReset Bit */
+	writel(reg, (KWGBE_PORT_SERIAL_CONTROL1_REG(0)));
+	reg = readl(KWGBE_PORT_SERIAL_CONTROL1_REG(1));
+	reg &= ~(1 << 4);	/* Clear PortReset Bit */
+	writel(reg, (KWGBE_PORT_SERIAL_CONTROL1_REG(1)));
+#endif
+#ifdef CONFIG_KIRKWOOD_PCIE_INIT
+	/*
+	 * Enable PCI Express Port0
+	 */
+	reg = readl(&cpureg->ctrl_stat);
+	reg |= (1 << 0);	/* Set PEX0En Bit */
+	writel(reg, &cpureg->ctrl_stat);
+#endif
+	return 0;
+}
+#endif /* CONFIG_ARCH_CPU_INIT */
+
+/*
+ * SOC specific misc init
+ */
+#if defined(CONFIG_ARCH_MISC_INIT)
+int arch_misc_init(void)
+{
+	volatile u32 temp;
+
+	/*CPU streaming & write allocate */
+	temp = readfr_extra_feature_reg();
+	temp &= ~(1 << 28);	/* disable wr alloc */
+	writefr_extra_feature_reg(temp);
+
+	temp = readfr_extra_feature_reg();
+	temp &= ~(1 << 29);	/* streaming disabled */
+	writefr_extra_feature_reg(temp);
+
+	/* L2Cache settings */
+	temp = readfr_extra_feature_reg();
+	/* Disable L2C pre fetch - Set bit 24 */
+	temp |= (1 << 24);
+	/* enable L2C - Set bit 22 */
+	temp |= (1 << 22);
+	writefr_extra_feature_reg(temp);
+
+	icache_enable();
+	/* Change reset vector to address 0x0 */
+	temp = get_cr();
+	set_cr(temp & ~CR_V);
+
+	/* checks and execute resset to factory event */
+	kw_sysrst_check();
+
+	return 0;
+}
+#endif /* CONFIG_ARCH_MISC_INIT */
+
+#ifdef CONFIG_MVGBE
+int cpu_eth_init(bd_t *bis)
+{
+	mvgbe_initialize(bis);
+	return 0;
+}
+#endif