ARM64: hikey: hi6220: Add u-boot support for the 96boards CE HiKey board.

HiKey is the first 96boards consumer edition compliant board. It features a hi6220
SoC which has eight ARM A53 cpu's.

This initial port adds support for: -
1) Serial
2) eMMC / SD card
3) USB
4) GPIO

It has been tested with Arm Trusted Firmware running u-boot as the BL33 executable.

Notes:

eMMC has been tested with basic reading of eMMC partition into DDR. I have not
tested writing / erasing. Due to lack of clock control it won't be
running in the most performant high speed mode.

SD card slot has been tested for reading and booting kernels into DDR.
It is also currently configured to save the u-boot environment to the
SD card.

USB has been tested with ASIX networking adapter to tftpboot kernels
into DDR. On v2015.07-rc2 dhcp now works, and also USB mass storage
are correctly enumerated.

GPIO has been tested using gpio toggle GPIO4_1-3 to flash the LEDs.

Basic SoC datasheet can be found here: -
https://github.com/96boards/documentation/blob/master/hikey/
Hi6220V100_Multi-Mode_Application_Processor_Function_Description.pdf

Board schematic can be found here: -
https://github.com/96boards/documentation/blob/master/hikey/
96Boards-Hikey-Rev-A1.pdf

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>

3 files changed, 379 insertions, 0 deletions

diff --git a/board/hisilicon/hikey/Kconfig b/board/hisilicon/hikey/Kconfig
new file mode 100644
index 0000000000..f7f1055e17
--- /dev/null
+++ b/board/hisilicon/hikey/Kconfig
@@ -0,0 +1,15 @@
+if TARGET_HIKEY
+
+config SYS_BOARD
+	default "hikey"
+
+config SYS_VENDOR
+	default "hisilicon"
+
+config SYS_SOC
+	default "hi6220"
+
+config SYS_CONFIG_NAME
+	default "hikey"
+
+endif
diff --git a/board/hisilicon/hikey/Makefile b/board/hisilicon/hikey/Makefile
new file mode 100644
index 0000000000..d4ec8c7f43
--- /dev/null
+++ b/board/hisilicon/hikey/Makefile
@@ -0,0 +1,8 @@
+#
+# (C) Copyright 2000-2004
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y	:= hikey.o
diff --git a/board/hisilicon/hikey/hikey.c b/board/hisilicon/hikey/hikey.c
new file mode 100644
index 0000000000..8c1271b4a4
--- /dev/null
+++ b/board/hisilicon/hikey/hikey.c
@@ -0,0 +1,356 @@
+/*
+ * (C) Copyright 2015 Linaro
+ * Peter Griffin <peter.griffin@linaro.org>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <malloc.h>
+#include <netdev.h>
+#include <asm/io.h>
+#include <usb.h>
+#include <power/hi6553_pmic.h>
+#include <asm-generic/gpio.h>
+#include <asm/arch/dwmmc.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/periph.h>
+#include <asm/arch/pinmux.h>
+#include <asm/arch/hi6220.h>
+
+/*TODO drop this table in favour of device tree */
+static const struct hikey_gpio_platdata hi6220_gpio[] = {
+	{ 0, HI6220_GPIO_BASE(0)},
+	{ 1, HI6220_GPIO_BASE(1)},
+	{ 2, HI6220_GPIO_BASE(2)},
+	{ 3, HI6220_GPIO_BASE(3)},
+	{ 4, HI6220_GPIO_BASE(4)},
+	{ 5, HI6220_GPIO_BASE(5)},
+	{ 6, HI6220_GPIO_BASE(6)},
+	{ 7, HI6220_GPIO_BASE(7)},
+	{ 8, HI6220_GPIO_BASE(8)},
+	{ 9, HI6220_GPIO_BASE(9)},
+	{ 10, HI6220_GPIO_BASE(10)},
+	{ 11, HI6220_GPIO_BASE(11)},
+	{ 12, HI6220_GPIO_BASE(12)},
+	{ 13, HI6220_GPIO_BASE(13)},
+	{ 14, HI6220_GPIO_BASE(14)},
+	{ 15, HI6220_GPIO_BASE(15)},
+	{ 16, HI6220_GPIO_BASE(16)},
+	{ 17, HI6220_GPIO_BASE(17)},
+	{ 18, HI6220_GPIO_BASE(18)},
+	{ 19, HI6220_GPIO_BASE(19)},
+
+};
+
+U_BOOT_DEVICES(hi6220_gpios) = {
+	{ "gpio_hi6220", &hi6220_gpio[0] },
+	{ "gpio_hi6220", &hi6220_gpio[1] },
+	{ "gpio_hi6220", &hi6220_gpio[2] },
+	{ "gpio_hi6220", &hi6220_gpio[3] },
+	{ "gpio_hi6220", &hi6220_gpio[4] },
+	{ "gpio_hi6220", &hi6220_gpio[5] },
+	{ "gpio_hi6220", &hi6220_gpio[6] },
+	{ "gpio_hi6220", &hi6220_gpio[7] },
+	{ "gpio_hi6220", &hi6220_gpio[8] },
+	{ "gpio_hi6220", &hi6220_gpio[9] },
+	{ "gpio_hi6220", &hi6220_gpio[10] },
+	{ "gpio_hi6220", &hi6220_gpio[11] },
+	{ "gpio_hi6220", &hi6220_gpio[12] },
+	{ "gpio_hi6220", &hi6220_gpio[13] },
+	{ "gpio_hi6220", &hi6220_gpio[14] },
+	{ "gpio_hi6220", &hi6220_gpio[15] },
+	{ "gpio_hi6220", &hi6220_gpio[16] },
+	{ "gpio_hi6220", &hi6220_gpio[17] },
+	{ "gpio_hi6220", &hi6220_gpio[18] },
+	{ "gpio_hi6220", &hi6220_gpio[19] },
+};
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct peri_sc_periph_regs *peri_sc =
+	(struct peri_sc_periph_regs *)HI6220_PERI_BASE;
+
+struct alwayson_sc_regs *ao_sc =
+	(struct alwayson_sc_regs *)ALWAYSON_CTRL_BASE;
+
+/* status offset from enable reg */
+#define STAT_EN_OFF 0x2
+
+void hi6220_clk_enable(u32 bitfield, unsigned int *clk_base)
+{
+	uint32_t data;
+
+	data = readl(clk_base);
+	data |= bitfield;
+
+	writel(bitfield, clk_base);
+	do {
+		data = readl(clk_base + STAT_EN_OFF);
+	} while ((data & bitfield) == 0);
+}
+
+/* status offset from disable reg */
+#define STAT_DIS_OFF 0x1
+
+void hi6220_clk_disable(u32 bitfield, unsigned int *clk_base)
+{
+	uint32_t data;
+
+	data = readl(clk_base);
+	data |= bitfield;
+
+	writel(data, clk_base);
+	do {
+		data = readl(clk_base + STAT_DIS_OFF);
+	} while (data & bitfield);
+}
+
+#define EYE_PATTERN	0x70533483
+
+int board_usb_init(int index, enum usb_init_type init)
+{
+	unsigned int data;
+
+	/* enable USB clock */
+	hi6220_clk_enable(PERI_CLK0_USBOTG, &peri_sc->clk0_en);
+
+	/* take usb IPs out of reset */
+	writel(PERI_RST0_USBOTG_BUS | PERI_RST0_POR_PICOPHY |
+		PERI_RST0_USBOTG | PERI_RST0_USBOTG_32K,
+		&peri_sc->rst0_dis);
+	do {
+		data = readl(&peri_sc->rst0_stat);
+		data &= PERI_RST0_USBOTG_BUS | PERI_RST0_POR_PICOPHY |
+			PERI_RST0_USBOTG | PERI_RST0_USBOTG_32K;
+	} while (data);
+
+	/*CTRL 5*/
+	data = readl(&peri_sc->ctrl5);
+	data &= ~PERI_CTRL5_PICOPHY_BC_MODE;
+	data |= PERI_CTRL5_USBOTG_RES_SEL | PERI_CTRL5_PICOPHY_ACAENB;
+	data |= 0x300;
+	writel(data, &peri_sc->ctrl5);
+
+	/*CTRL 4*/
+
+	/* configure USB PHY */
+	data = readl(&peri_sc->ctrl4);
+
+	/* make PHY out of low power mode */
+	data &= ~PERI_CTRL4_PICO_SIDDQ;
+	data &= ~PERI_CTRL4_PICO_OGDISABLE;
+	data |= PERI_CTRL4_PICO_VBUSVLDEXTSEL | PERI_CTRL4_PICO_VBUSVLDEXT;
+	writel(data, &peri_sc->ctrl4);
+
+	writel(EYE_PATTERN, &peri_sc->ctrl8);
+
+	mdelay(5);
+	return 0;
+}
+
+static int config_sd_carddetect(void)
+{
+	int ret;
+
+	/* configure GPIO8 as nopull */
+	writel(0, 0xf8001830);
+
+	gpio_request(8, "SD CD");
+
+	gpio_direction_input(8);
+	ret = gpio_get_value(8);
+
+	if (!ret) {
+		printf("%s: SD card present\n", __func__);
+		return 1;
+	}
+
+	printf("%s: SD card not present\n", __func__);
+	return 0;
+}
+
+
+static void mmc1_init_pll(void)
+{
+	uint32_t data;
+
+	/* select SYSPLL as the source of MMC1 */
+	/* select SYSPLL as the source of MUX1 (SC_CLK_SEL0) */
+	writel(1 << 11 | 1 << 27, &peri_sc->clk0_sel);
+	do {
+		data = readl(&peri_sc->clk0_sel);
+	} while (!(data & (1 << 11)));
+
+	/* select MUX1 as the source of MUX2 (SC_CLK_SEL0) */
+	writel(1 << 30, &peri_sc->clk0_sel);
+	do {
+		data = readl(&peri_sc->clk0_sel);
+	} while (data & (1 << 14));
+
+	hi6220_clk_enable(PERI_CLK0_MMC1, &peri_sc->clk0_en);
+
+	hi6220_clk_enable(PERI_CLK12_MMC1_SRC, &peri_sc->clk12_en);
+
+	do {
+		/* 1.2GHz / 50 = 24MHz */
+		writel(0x31 | (1 << 7), &peri_sc->clkcfg8bit2);
+		data = readl(&peri_sc->clkcfg8bit2);
+	} while ((data & 0x31) != 0x31);
+}
+
+static void mmc1_reset_clk(void)
+{
+	unsigned int data;
+
+	/* disable mmc1 bus clock */
+	hi6220_clk_disable(PERI_CLK0_MMC1, &peri_sc->clk0_dis);
+
+	/* enable mmc1 bus clock */
+	hi6220_clk_enable(PERI_CLK0_MMC1, &peri_sc->clk0_en);
+
+	/* reset mmc1 clock domain */
+	writel(PERI_RST0_MMC1, &peri_sc->rst0_en);
+
+	/* bypass mmc1 clock phase */
+	data = readl(&peri_sc->ctrl2);
+	data |= 3 << 2;
+	writel(data, &peri_sc->ctrl2);
+
+	/* disable low power */
+	data = readl(&peri_sc->ctrl13);
+	data |= 1 << 4;
+	writel(data, &peri_sc->ctrl13);
+	do {
+		data = readl(&peri_sc->rst0_stat);
+	} while (!(data & PERI_RST0_MMC1));
+
+	/* unreset mmc0 clock domain */
+	writel(PERI_RST0_MMC1, &peri_sc->rst0_dis);
+	do {
+		data = readl(&peri_sc->rst0_stat);
+	} while (data & PERI_RST0_MMC1);
+}
+
+/* PMU SSI is the IP that maps the external PMU hi6553 registers as IO */
+static void hi6220_pmussi_init(void)
+{
+	uint32_t data;
+
+	/* Take PMUSSI out of reset */
+	writel(ALWAYSON_SC_PERIPH_RST4_DIS_PRESET_PMUSSI_N,
+	       &ao_sc->rst4_dis);
+	do {
+		data = readl(&ao_sc->rst4_stat);
+	} while (data & ALWAYSON_SC_PERIPH_RST4_DIS_PRESET_PMUSSI_N);
+
+	/* set PMU SSI clock latency for read operation */
+	data = readl(&ao_sc->mcu_subsys_ctrl3);
+	data &= ~ALWAYSON_SC_MCU_SUBSYS_CTRL3_RCLK_MASK;
+	data |= ALWAYSON_SC_MCU_SUBSYS_CTRL3_RCLK_3;
+	writel(data, &ao_sc->mcu_subsys_ctrl3);
+
+	/* enable PMUSSI clock */
+	data = ALWAYSON_SC_PERIPH_CLK5_EN_PCLK_PMUSSI_CCPU |
+	       ALWAYSON_SC_PERIPH_CLK5_EN_PCLK_PMUSSI_MCU;
+
+	hi6220_clk_enable(data, &ao_sc->clk5_en);
+
+	/* Output high to PMIC on PWR_HOLD_GPIO0_0 */
+	gpio_request(0, "PWR_HOLD_GPIO0_0");
+	gpio_direction_output(0, 1);
+}
+
+int misc_init_r(void)
+{
+	return 0;
+}
+
+int board_init(void)
+{
+	gd->flags = 0;
+
+	return 0;
+}
+
+#ifdef CONFIG_GENERIC_MMC
+
+static int init_dwmmc(void)
+{
+	int ret;
+
+#ifdef CONFIG_DWMMC
+
+	/* mmc0 clocks are already configured by ATF */
+	ret = hi6220_pinmux_config(PERIPH_ID_SDMMC0);
+	if (ret)
+		printf("%s: Error configuring pinmux for eMMC (%d)\n"
+			, __func__, ret);
+
+	ret |= hi6220_dwmci_add_port(0, HI6220_MMC0_BASE, 8);
+	if (ret)
+		printf("%s: Error adding eMMC port (%d)\n", __func__, ret);
+
+
+	/* take mmc1 (sd slot) out of reset, configure clocks and pinmuxing */
+	mmc1_init_pll();
+	mmc1_reset_clk();
+
+	ret |= hi6220_pinmux_config(PERIPH_ID_SDMMC1);
+	if (ret)
+		printf("%s: Error configuring pinmux for eMMC (%d)\n"
+			, __func__, ret);
+
+	config_sd_carddetect();
+
+	ret |= hi6220_dwmci_add_port(1, HI6220_MMC1_BASE, 4);
+	if (ret)
+		printf("%s: Error adding SD port (%d)\n", __func__, ret);
+
+#endif
+	return ret;
+}
+
+/* setup board specific PMIC */
+int power_init_board(void)
+{
+	/* init the hi6220 pmussi ip */
+	hi6220_pmussi_init();
+
+	power_hi6553_init((u8 *)HI6220_PMUSSI_BASE);
+
+	return 0;
+}
+
+int board_mmc_init(bd_t *bis)
+{
+	int ret;
+
+	/* add the eMMC and sd ports */
+	ret = init_dwmmc();
+
+	if (ret)
+		debug("init_dwmmc failed\n");
+
+	return ret;
+}
+#endif
+
+int dram_init(void)
+{
+	gd->ram_size = PHYS_SDRAM_1_SIZE;
+	return 0;
+}
+
+void dram_init_banksize(void)
+{
+	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
+	gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
+}
+
+/* Use the Watchdog to cause reset */
+void reset_cpu(ulong addr)
+{
+	/* TODO program the watchdog */
+}