plat/rockchip/rk3399/drivers/gpio/rk3399_gpio.c - filogic/atf - Gitiles

 /*
  * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */

 #include <assert.h>
 #include <errno.h>

 #include <platform_def.h>

 #include <common/debug.h>
 #include <drivers/delay_timer.h>
 #include <drivers/gpio.h>
 #include <lib/mmio.h>
 #include <plat/common/platform.h>

 #include <plat_private.h>
 #include <soc.h>

 uint32_t gpio_port[] = {
 	GPIO0_BASE,
 	GPIO1_BASE,
 	GPIO2_BASE,
 	GPIO3_BASE,
 	GPIO4_BASE,
 };

 struct {
 	uint32_t swporta_dr;
 	uint32_t swporta_ddr;
 	uint32_t inten;
 	uint32_t intmask;
 	uint32_t inttype_level;
 	uint32_t int_polarity;
 	uint32_t debounce;
 	uint32_t ls_sync;
 } store_gpio[3];

 static uint32_t store_grf_gpio[(GRF_GPIO2D_HE - GRF_GPIO2A_IOMUX) / 4 + 1];

 #define SWPORTA_DR	0x00
 #define SWPORTA_DDR	0x04
 #define INTEN		0x30
 #define INTMASK		0x34
 #define INTTYPE_LEVEL	0x38
 #define INT_POLARITY	0x3c
 #define DEBOUNCE	0x48
 #define LS_SYNC		0x60

 #define EXT_PORTA	0x50
 #define PMU_GPIO_PORT0	0
 #define PMU_GPIO_PORT1	1
 #define GPIO_PORT2	2
 #define GPIO_PORT3	3
 #define GPIO_PORT4	4

 #define PMU_GRF_GPIO0A_P	0x40
 #define GRF_GPIO2A_P		0xe040
 #define GPIO_P_MASK		0x03

 #define GET_GPIO_PORT(pin)	(pin / 32)
 #define GET_GPIO_NUM(pin)	(pin % 32)
 #define GET_GPIO_BANK(pin)	((pin % 32) / 8)
 #define GET_GPIO_ID(pin)	((pin % 32) % 8)

 /* returns old clock state, enables clock, in order to do GPIO access */
 static int gpio_get_clock(uint32_t gpio_number)
 {
 	uint32_t port = GET_GPIO_PORT(gpio_number);
 	uint32_t clock_state = 0;

 	assert(port < 5);

 	switch (port) {
 	case PMU_GPIO_PORT0:
 		clock_state = (mmio_read_32(PMUCRU_BASE +
 					    CRU_PMU_CLKGATE_CON(1)) >>
 					    PCLK_GPIO0_GATE_SHIFT) & 0x01;
 		mmio_write_32(PMUCRU_BASE + CRU_PMU_CLKGATE_CON(1),
 			      BITS_WITH_WMASK(0, CLK_GATE_MASK,
 					      PCLK_GPIO0_GATE_SHIFT));
 		break;
 	case PMU_GPIO_PORT1:
 		clock_state = (mmio_read_32(PMUCRU_BASE +
 					    CRU_PMU_CLKGATE_CON(1)) >>
 					    PCLK_GPIO1_GATE_SHIFT) & 0x01;
 		mmio_write_32(PMUCRU_BASE + CRU_PMU_CLKGATE_CON(1),
 			      BITS_WITH_WMASK(0, CLK_GATE_MASK,
 					      PCLK_GPIO1_GATE_SHIFT));
 		break;
 	case GPIO_PORT2:
 		clock_state = (mmio_read_32(CRU_BASE +
 					    CRU_CLKGATE_CON(31)) >>
 					    PCLK_GPIO2_GATE_SHIFT) & 0x01;
 		mmio_write_32(CRU_BASE + CRU_CLKGATE_CON(31),
 			      BITS_WITH_WMASK(0, CLK_GATE_MASK,
 					      PCLK_GPIO2_GATE_SHIFT));
 		break;
 	case GPIO_PORT3:
 		clock_state = (mmio_read_32(CRU_BASE +
 					    CRU_CLKGATE_CON(31)) >>
 					    PCLK_GPIO3_GATE_SHIFT) & 0x01;
 		mmio_write_32(CRU_BASE + CRU_CLKGATE_CON(31),
 			      BITS_WITH_WMASK(0, CLK_GATE_MASK,
 					      PCLK_GPIO3_GATE_SHIFT));
 		break;
 	case GPIO_PORT4:
 		clock_state = (mmio_read_32(CRU_BASE +
 					    CRU_CLKGATE_CON(31)) >>
 					    PCLK_GPIO4_GATE_SHIFT) & 0x01;
 		mmio_write_32(CRU_BASE + CRU_CLKGATE_CON(31),
 			      BITS_WITH_WMASK(0, CLK_GATE_MASK,
 					      PCLK_GPIO4_GATE_SHIFT));
 		break;
 	default:
 		break;
 	}

 	return clock_state;
 }

 /* restores old state of gpio clock */
 void gpio_put_clock(uint32_t gpio_number, uint32_t clock_state)
 {
 	uint32_t port = GET_GPIO_PORT(gpio_number);

 	switch (port) {
 	case PMU_GPIO_PORT0:
 		mmio_write_32(PMUCRU_BASE + CRU_PMU_CLKGATE_CON(1),
 			      BITS_WITH_WMASK(clock_state, CLK_GATE_MASK,
 					      PCLK_GPIO0_GATE_SHIFT));
 		break;
 	case PMU_GPIO_PORT1:
 		mmio_write_32(PMUCRU_BASE + CRU_PMU_CLKGATE_CON(1),
 			      BITS_WITH_WMASK(clock_state, CLK_GATE_MASK,
 					      PCLK_GPIO1_GATE_SHIFT));
 		break;
 	case GPIO_PORT2:
 		mmio_write_32(CRU_BASE + CRU_CLKGATE_CON(31),
 			      BITS_WITH_WMASK(clock_state, CLK_GATE_MASK,
 					      PCLK_GPIO2_GATE_SHIFT));
 		break;
 	case GPIO_PORT3:
 		mmio_write_32(CRU_BASE + CRU_CLKGATE_CON(31),
 			      BITS_WITH_WMASK(clock_state, CLK_GATE_MASK,
 					      PCLK_GPIO3_GATE_SHIFT));

 		break;
 	case GPIO_PORT4:
 		mmio_write_32(CRU_BASE + CRU_CLKGATE_CON(31),
 			      BITS_WITH_WMASK(clock_state, CLK_GATE_MASK,
 					      PCLK_GPIO4_GATE_SHIFT));
 		break;
 	default:
 		break;
 	}
 }

 static int get_pull(int gpio)
 {
 	uint32_t port = GET_GPIO_PORT(gpio);
 	uint32_t bank = GET_GPIO_BANK(gpio);
 	uint32_t id = GET_GPIO_ID(gpio);
 	uint32_t val, clock_state;

 	assert((port < 5) && (bank < 4));

 	clock_state = gpio_get_clock(gpio);

 	if (port == PMU_GPIO_PORT0 || port == PMU_GPIO_PORT1) {
 		val = mmio_read_32(PMUGRF_BASE + PMU_GRF_GPIO0A_P +
 				   port * 16 + bank * 4);
 		val = (val >> (id * 2)) & GPIO_P_MASK;
 	} else {
 		val = mmio_read_32(GRF_BASE + GRF_GPIO2A_P +
 				   (port - 2) * 16 + bank * 4);
 		val = (val >> (id * 2)) & GPIO_P_MASK;
 	}
 	gpio_put_clock(gpio, clock_state);

 	/*
 	 * in gpio0a, gpio0b, gpio2c, gpio2d,
 	 * 00: Z
 	 * 01: pull down
 	 * 10: Z
 	 * 11: pull up
 	 * different with other gpio, so need to correct it
 	 */
 	if (((port == 0) && (bank < 2)) || ((port == 2) && (bank > 1))) {
 		if (val == 3)
 			val = GPIO_PULL_UP;
 		else if (val == 1)
 			val = GPIO_PULL_DOWN;
 		else
 			val = 0;
 	}

 	return val;
 }

 static void set_pull(int gpio, int pull)
 {
 	uint32_t port = GET_GPIO_PORT(gpio);
 	uint32_t bank = GET_GPIO_BANK(gpio);
 	uint32_t id = GET_GPIO_ID(gpio);
 	uint32_t clock_state;

 	assert((port < 5) && (bank < 4));

 	clock_state = gpio_get_clock(gpio);

 	/*
 	 * in gpio0a, gpio0b, gpio2c, gpio2d,
 	 * 00: Z
 	 * 01: pull down
 	 * 10: Z
 	 * 11: pull up
 	 * different with other gpio, so need to correct it
 	 */
 	if (((port == 0) && (bank < 2)) || ((port == 2) && (bank > 1))) {
 		if (pull == GPIO_PULL_UP)
 			pull = 3;
 		else if (pull == GPIO_PULL_DOWN)
 			pull = 1;
 		else
 			pull = 0;
 	}

 	if (port == PMU_GPIO_PORT0 || port == PMU_GPIO_PORT1) {
 		mmio_write_32(PMUGRF_BASE + PMU_GRF_GPIO0A_P +
 			      port * 16 + bank * 4,
 			      BITS_WITH_WMASK(pull, GPIO_P_MASK, id * 2));
 	} else {
 		mmio_write_32(GRF_BASE + GRF_GPIO2A_P +
 			      (port - 2) * 16 + bank * 4,
 			      BITS_WITH_WMASK(pull, GPIO_P_MASK, id * 2));
 	}
 	gpio_put_clock(gpio, clock_state);
 }

 static void set_direction(int gpio, int direction)
 {
 	uint32_t port = GET_GPIO_PORT(gpio);
 	uint32_t num = GET_GPIO_NUM(gpio);
 	uint32_t clock_state;

 	assert((port < 5) && (num < 32));

 	clock_state = gpio_get_clock(gpio);

 	/*
 	 * in gpio.h
 	 * #define GPIO_DIR_OUT	0
 	 * #define GPIO_DIR_IN	1
 	 * but rk3399 gpio direction 1: output, 0: input
 	 * so need to revert direction value
 	 */
 	mmio_setbits_32(gpio_port[port] + SWPORTA_DDR, !direction << num);
 	gpio_put_clock(gpio, clock_state);
 }

 static int get_direction(int gpio)
 {
 	uint32_t port = GET_GPIO_PORT(gpio);
 	uint32_t num = GET_GPIO_NUM(gpio);
 	int direction, clock_state;

 	assert((port < 5) && (num < 32));

 	clock_state = gpio_get_clock(gpio);

 	/*
 	 * in gpio.h
 	 * #define GPIO_DIR_OUT	0
 	 * #define GPIO_DIR_IN	1
 	 * but rk3399 gpio direction 1: output, 0: input
 	 * so need to revert direction value
 	 */
 	direction = !((mmio_read_32(gpio_port[port] +
 				    SWPORTA_DDR) >> num) & 0x1);
 	gpio_put_clock(gpio, clock_state);

 	return direction;
 }

 static int get_value(int gpio)
 {
 	uint32_t port = GET_GPIO_PORT(gpio);
 	uint32_t num = GET_GPIO_NUM(gpio);
 	int value, clock_state;

 	assert((port < 5) && (num < 32));

 	clock_state = gpio_get_clock(gpio);
 	value = (mmio_read_32(gpio_port[port] + EXT_PORTA) >> num) & 0x1;
 	gpio_put_clock(gpio, clock_state);

 	return value;
 }

 static void set_value(int gpio, int value)
 {
 	uint32_t port = GET_GPIO_PORT(gpio);
 	uint32_t num = GET_GPIO_NUM(gpio);
 	uint32_t clock_state;

 	assert((port < 5) && (num < 32));

 	clock_state = gpio_get_clock(gpio);
 	mmio_clrsetbits_32(gpio_port[port] + SWPORTA_DR, 1 << num,
 							 !!value << num);
 	gpio_put_clock(gpio, clock_state);
 }

 void plat_rockchip_save_gpio(void)
 {
 	int i;
 	uint32_t cru_gate_save;

 	cru_gate_save = mmio_read_32(CRU_BASE + CRU_CLKGATE_CON(31));

 	/*
 	 * when shutdown logic, we need to save gpio2 ~ gpio4 register,
 	 * we need to enable gpio2 ~ gpio4 clock here, since it may be gating,
 	 * and we do not care gpio0 and gpio1 clock gate, since we never
 	 * gating them
 	 */
 	mmio_write_32(CRU_BASE + CRU_CLKGATE_CON(31),
 		      BITS_WITH_WMASK(0, 0x07, PCLK_GPIO2_GATE_SHIFT));

 	/*
 	 * since gpio0, gpio1 are pmugpio, they will keep ther value
 	 * when shutdown logic power rail, so only need to save gpio2 ~ gpio4
 	 * register value
 	 */
 	for (i = 2; i < 5; i++) {
 		store_gpio[i - 2].swporta_dr =
 			mmio_read_32(gpio_port[i] + SWPORTA_DR);
 		store_gpio[i - 2].swporta_ddr =
 			mmio_read_32(gpio_port[i] + SWPORTA_DDR);
 		store_gpio[i - 2].inten =
 			mmio_read_32(gpio_port[i] + INTEN);
 		store_gpio[i - 2].intmask =
 			mmio_read_32(gpio_port[i] + INTMASK);
 		store_gpio[i - 2].inttype_level =
 			mmio_read_32(gpio_port[i] + INTTYPE_LEVEL);
 		store_gpio[i - 2].int_polarity =
 			mmio_read_32(gpio_port[i] + INT_POLARITY);
 		store_gpio[i - 2].debounce =
 			mmio_read_32(gpio_port[i] + DEBOUNCE);
 		store_gpio[i - 2].ls_sync =
 			mmio_read_32(gpio_port[i] + LS_SYNC);
 	}
 	mmio_write_32(CRU_BASE + CRU_CLKGATE_CON(31),
 			cru_gate_save | REG_SOC_WMSK);

 	/*
 	 * gpio0, gpio1 in pmuiomux, they will keep ther value
 	 * when shutdown logic power rail, so only need to save gpio2 ~ gpio4
 	 * iomux register value
 	 */
 	for (i = 0; i < ARRAY_SIZE(store_grf_gpio); i++)
 		store_grf_gpio[i] =
 			mmio_read_32(GRF_BASE + GRF_GPIO2A_IOMUX + i * 4);
 }

 void plat_rockchip_restore_gpio(void)
 {
 	int i;
 	uint32_t cru_gate_save;

 	for (i = 0; i < ARRAY_SIZE(store_grf_gpio); i++)
 		mmio_write_32(GRF_BASE + GRF_GPIO2A_IOMUX + i * 4,
 		      REG_SOC_WMSK | store_grf_gpio[i]);

 	cru_gate_save = mmio_read_32(CRU_BASE + CRU_CLKGATE_CON(31));

 	/*
 	 * when shutdown logic, we need to save gpio2 ~ gpio4 register,
 	 * we need to enable gpio2 ~ gpio4 clock here, since it may be gating,
 	 * and we do not care gpio0 and gpio1 clock gate, since we never
 	 * gating them
 	 */
 	mmio_write_32(CRU_BASE + CRU_CLKGATE_CON(31),
 		      BITS_WITH_WMASK(0, 0x07, PCLK_GPIO2_GATE_SHIFT));

 	for (i = 2; i < 5; i++) {
 		mmio_write_32(gpio_port[i] + SWPORTA_DR,
 				store_gpio[i - 2].swporta_dr);
 		mmio_write_32(gpio_port[i] + SWPORTA_DDR,
 				store_gpio[i - 2].swporta_ddr);
 		mmio_write_32(gpio_port[i] + INTEN, store_gpio[i - 2].inten);
 		mmio_write_32(gpio_port[i] + INTMASK,
 				store_gpio[i - 2].intmask);
 		mmio_write_32(gpio_port[i] + INTTYPE_LEVEL,
 				store_gpio[i - 2].inttype_level);
 		mmio_write_32(gpio_port[i] + INT_POLARITY,
 				store_gpio[i - 2].int_polarity);
 		mmio_write_32(gpio_port[i] + DEBOUNCE,
 				store_gpio[i - 2].debounce);
 		mmio_write_32(gpio_port[i] + LS_SYNC,
 				store_gpio[i - 2].ls_sync);
 	}
 	mmio_write_32(CRU_BASE + CRU_CLKGATE_CON(31),
 			cru_gate_save | REG_SOC_WMSK);
 }

 const gpio_ops_t rk3399_gpio_ops = {
 	.get_direction = get_direction,
 	.set_direction = set_direction,
 	.get_value = get_value,
 	.set_value = set_value,
 	.set_pull = set_pull,
 	.get_pull = get_pull,
 };

 void plat_rockchip_gpio_init(void)
 {
 	gpio_init(&rk3399_gpio_ops);
 }
	/*
	* Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
	*
	* SPDX-License-Identifier: BSD-3-Clause
	*/

	#include <assert.h>
	#include <errno.h>

	#include <platform_def.h>

	#include <common/debug.h>
	#include <drivers/delay_timer.h>
	#include <drivers/gpio.h>
	#include <lib/mmio.h>
	#include <plat/common/platform.h>

	#include <plat_private.h>
	#include <soc.h>

	uint32_t gpio_port[] = {
	GPIO0_BASE,
	GPIO1_BASE,
	GPIO2_BASE,
	GPIO3_BASE,
	GPIO4_BASE,
	};

	struct {
	uint32_t swporta_dr;
	uint32_t swporta_ddr;
	uint32_t inten;
	uint32_t intmask;
	uint32_t inttype_level;
	uint32_t int_polarity;
	uint32_t debounce;
	uint32_t ls_sync;
	} store_gpio[3];

	static uint32_t store_grf_gpio[(GRF_GPIO2D_HE - GRF_GPIO2A_IOMUX) / 4 + 1];

	#define SWPORTA_DR 0x00
	#define SWPORTA_DDR 0x04
	#define INTEN 0x30
	#define INTMASK 0x34
	#define INTTYPE_LEVEL 0x38
	#define INT_POLARITY 0x3c
	#define DEBOUNCE 0x48
	#define LS_SYNC 0x60

	#define EXT_PORTA 0x50
	#define PMU_GPIO_PORT0 0
	#define PMU_GPIO_PORT1 1
	#define GPIO_PORT2 2
	#define GPIO_PORT3 3
	#define GPIO_PORT4 4

	#define PMU_GRF_GPIO0A_P 0x40
	#define GRF_GPIO2A_P 0xe040
	#define GPIO_P_MASK 0x03

	#define GET_GPIO_PORT(pin) (pin / 32)
	#define GET_GPIO_NUM(pin) (pin % 32)
	#define GET_GPIO_BANK(pin) ((pin % 32) / 8)
	#define GET_GPIO_ID(pin) ((pin % 32) % 8)

	/* returns old clock state, enables clock, in order to do GPIO access */
	static int gpio_get_clock(uint32_t gpio_number)
	{
	uint32_t port = GET_GPIO_PORT(gpio_number);
	uint32_t clock_state = 0;

	assert(port < 5);

	switch (port) {
	case PMU_GPIO_PORT0:
	clock_state = (mmio_read_32(PMUCRU_BASE +
	CRU_PMU_CLKGATE_CON(1)) >>
	PCLK_GPIO0_GATE_SHIFT) & 0x01;
	mmio_write_32(PMUCRU_BASE + CRU_PMU_CLKGATE_CON(1),
	BITS_WITH_WMASK(0, CLK_GATE_MASK,
	PCLK_GPIO0_GATE_SHIFT));
	break;
	case PMU_GPIO_PORT1:
	clock_state = (mmio_read_32(PMUCRU_BASE +
	CRU_PMU_CLKGATE_CON(1)) >>
	PCLK_GPIO1_GATE_SHIFT) & 0x01;
	mmio_write_32(PMUCRU_BASE + CRU_PMU_CLKGATE_CON(1),
	BITS_WITH_WMASK(0, CLK_GATE_MASK,
	PCLK_GPIO1_GATE_SHIFT));
	break;
	case GPIO_PORT2:
	clock_state = (mmio_read_32(CRU_BASE +
	CRU_CLKGATE_CON(31)) >>
	PCLK_GPIO2_GATE_SHIFT) & 0x01;
	mmio_write_32(CRU_BASE + CRU_CLKGATE_CON(31),
	BITS_WITH_WMASK(0, CLK_GATE_MASK,
	PCLK_GPIO2_GATE_SHIFT));
	break;
	case GPIO_PORT3:
	clock_state = (mmio_read_32(CRU_BASE +
	CRU_CLKGATE_CON(31)) >>
	PCLK_GPIO3_GATE_SHIFT) & 0x01;
	mmio_write_32(CRU_BASE + CRU_CLKGATE_CON(31),
	BITS_WITH_WMASK(0, CLK_GATE_MASK,
	PCLK_GPIO3_GATE_SHIFT));
	break;
	case GPIO_PORT4:
	clock_state = (mmio_read_32(CRU_BASE +
	CRU_CLKGATE_CON(31)) >>
	PCLK_GPIO4_GATE_SHIFT) & 0x01;
	mmio_write_32(CRU_BASE + CRU_CLKGATE_CON(31),
	BITS_WITH_WMASK(0, CLK_GATE_MASK,
	PCLK_GPIO4_GATE_SHIFT));
	break;
	default:
	break;
	}

	return clock_state;
	}

	/* restores old state of gpio clock */
	void gpio_put_clock(uint32_t gpio_number, uint32_t clock_state)
	{
	uint32_t port = GET_GPIO_PORT(gpio_number);

	switch (port) {
	case PMU_GPIO_PORT0:
	mmio_write_32(PMUCRU_BASE + CRU_PMU_CLKGATE_CON(1),
	BITS_WITH_WMASK(clock_state, CLK_GATE_MASK,
	PCLK_GPIO0_GATE_SHIFT));
	break;
	case PMU_GPIO_PORT1:
	mmio_write_32(PMUCRU_BASE + CRU_PMU_CLKGATE_CON(1),
	BITS_WITH_WMASK(clock_state, CLK_GATE_MASK,
	PCLK_GPIO1_GATE_SHIFT));
	break;
	case GPIO_PORT2:
	mmio_write_32(CRU_BASE + CRU_CLKGATE_CON(31),
	BITS_WITH_WMASK(clock_state, CLK_GATE_MASK,
	PCLK_GPIO2_GATE_SHIFT));
	break;
	case GPIO_PORT3:
	mmio_write_32(CRU_BASE + CRU_CLKGATE_CON(31),
	BITS_WITH_WMASK(clock_state, CLK_GATE_MASK,
	PCLK_GPIO3_GATE_SHIFT));

	break;
	case GPIO_PORT4:
	mmio_write_32(CRU_BASE + CRU_CLKGATE_CON(31),
	BITS_WITH_WMASK(clock_state, CLK_GATE_MASK,
	PCLK_GPIO4_GATE_SHIFT));
	break;
	default:
	break;
	}
	}

	static int get_pull(int gpio)
	{
	uint32_t port = GET_GPIO_PORT(gpio);
	uint32_t bank = GET_GPIO_BANK(gpio);
	uint32_t id = GET_GPIO_ID(gpio);
	uint32_t val, clock_state;

	assert((port < 5) && (bank < 4));

	clock_state = gpio_get_clock(gpio);

	if (port == PMU_GPIO_PORT0 \|\| port == PMU_GPIO_PORT1) {
	val = mmio_read_32(PMUGRF_BASE + PMU_GRF_GPIO0A_P +
	port * 16 + bank * 4);
	val = (val >> (id * 2)) & GPIO_P_MASK;
	} else {
	val = mmio_read_32(GRF_BASE + GRF_GPIO2A_P +
	(port - 2) * 16 + bank * 4);
	val = (val >> (id * 2)) & GPIO_P_MASK;
	}
	gpio_put_clock(gpio, clock_state);

	/*
	* in gpio0a, gpio0b, gpio2c, gpio2d,
	* 00: Z
	* 01: pull down
	* 10: Z
	* 11: pull up
	* different with other gpio, so need to correct it
	*/
	if (((port == 0) && (bank < 2)) \|\| ((port == 2) && (bank > 1))) {
	if (val == 3)
	val = GPIO_PULL_UP;
	else if (val == 1)
	val = GPIO_PULL_DOWN;
	else
	val = 0;
	}

	return val;
	}

	static void set_pull(int gpio, int pull)
	{
	uint32_t port = GET_GPIO_PORT(gpio);
	uint32_t bank = GET_GPIO_BANK(gpio);
	uint32_t id = GET_GPIO_ID(gpio);
	uint32_t clock_state;

	assert((port < 5) && (bank < 4));

	clock_state = gpio_get_clock(gpio);

	/*
	* in gpio0a, gpio0b, gpio2c, gpio2d,
	* 00: Z
	* 01: pull down
	* 10: Z
	* 11: pull up
	* different with other gpio, so need to correct it
	*/
	if (((port == 0) && (bank < 2)) \|\| ((port == 2) && (bank > 1))) {
	if (pull == GPIO_PULL_UP)
	pull = 3;
	else if (pull == GPIO_PULL_DOWN)
	pull = 1;
	else
	pull = 0;
	}

	if (port == PMU_GPIO_PORT0 \|\| port == PMU_GPIO_PORT1) {
	mmio_write_32(PMUGRF_BASE + PMU_GRF_GPIO0A_P +
	port * 16 + bank * 4,
	BITS_WITH_WMASK(pull, GPIO_P_MASK, id * 2));
	} else {
	mmio_write_32(GRF_BASE + GRF_GPIO2A_P +
	(port - 2) * 16 + bank * 4,
	BITS_WITH_WMASK(pull, GPIO_P_MASK, id * 2));
	}
	gpio_put_clock(gpio, clock_state);
	}

	static void set_direction(int gpio, int direction)
	{
	uint32_t port = GET_GPIO_PORT(gpio);
	uint32_t num = GET_GPIO_NUM(gpio);
	uint32_t clock_state;

	assert((port < 5) && (num < 32));

	clock_state = gpio_get_clock(gpio);

	/*
	* in gpio.h
	* #define GPIO_DIR_OUT 0
	* #define GPIO_DIR_IN 1
	* but rk3399 gpio direction 1: output, 0: input
	* so need to revert direction value
	*/
	mmio_setbits_32(gpio_port[port] + SWPORTA_DDR, !direction << num);
	gpio_put_clock(gpio, clock_state);
	}

	static int get_direction(int gpio)
	{
	uint32_t port = GET_GPIO_PORT(gpio);
	uint32_t num = GET_GPIO_NUM(gpio);
	int direction, clock_state;

	assert((port < 5) && (num < 32));

	clock_state = gpio_get_clock(gpio);

	/*
	* in gpio.h
	* #define GPIO_DIR_OUT 0
	* #define GPIO_DIR_IN 1
	* but rk3399 gpio direction 1: output, 0: input
	* so need to revert direction value
	*/
	direction = !((mmio_read_32(gpio_port[port] +
	SWPORTA_DDR) >> num) & 0x1);
	gpio_put_clock(gpio, clock_state);

	return direction;
	}

	static int get_value(int gpio)
	{
	uint32_t port = GET_GPIO_PORT(gpio);
	uint32_t num = GET_GPIO_NUM(gpio);
	int value, clock_state;

	assert((port < 5) && (num < 32));

	clock_state = gpio_get_clock(gpio);
	value = (mmio_read_32(gpio_port[port] + EXT_PORTA) >> num) & 0x1;
	gpio_put_clock(gpio, clock_state);

	return value;
	}

	static void set_value(int gpio, int value)
	{
	uint32_t port = GET_GPIO_PORT(gpio);
	uint32_t num = GET_GPIO_NUM(gpio);
	uint32_t clock_state;

	assert((port < 5) && (num < 32));

	clock_state = gpio_get_clock(gpio);
	mmio_clrsetbits_32(gpio_port[port] + SWPORTA_DR, 1 << num,
	!!value << num);
	gpio_put_clock(gpio, clock_state);
	}

	void plat_rockchip_save_gpio(void)
	{
	int i;
	uint32_t cru_gate_save;

	cru_gate_save = mmio_read_32(CRU_BASE + CRU_CLKGATE_CON(31));

	/*
	* when shutdown logic, we need to save gpio2 ~ gpio4 register,
	* we need to enable gpio2 ~ gpio4 clock here, since it may be gating,
	* and we do not care gpio0 and gpio1 clock gate, since we never
	* gating them
	*/
	mmio_write_32(CRU_BASE + CRU_CLKGATE_CON(31),
	BITS_WITH_WMASK(0, 0x07, PCLK_GPIO2_GATE_SHIFT));

	/*
	* since gpio0, gpio1 are pmugpio, they will keep ther value
	* when shutdown logic power rail, so only need to save gpio2 ~ gpio4
	* register value
	*/
	for (i = 2; i < 5; i++) {
	store_gpio[i - 2].swporta_dr =
	mmio_read_32(gpio_port[i] + SWPORTA_DR);
	store_gpio[i - 2].swporta_ddr =
	mmio_read_32(gpio_port[i] + SWPORTA_DDR);
	store_gpio[i - 2].inten =
	mmio_read_32(gpio_port[i] + INTEN);
	store_gpio[i - 2].intmask =
	mmio_read_32(gpio_port[i] + INTMASK);
	store_gpio[i - 2].inttype_level =
	mmio_read_32(gpio_port[i] + INTTYPE_LEVEL);
	store_gpio[i - 2].int_polarity =
	mmio_read_32(gpio_port[i] + INT_POLARITY);
	store_gpio[i - 2].debounce =
	mmio_read_32(gpio_port[i] + DEBOUNCE);
	store_gpio[i - 2].ls_sync =
	mmio_read_32(gpio_port[i] + LS_SYNC);
	}
	mmio_write_32(CRU_BASE + CRU_CLKGATE_CON(31),
	cru_gate_save \| REG_SOC_WMSK);

	/*
	* gpio0, gpio1 in pmuiomux, they will keep ther value
	* when shutdown logic power rail, so only need to save gpio2 ~ gpio4
	* iomux register value
	*/
	for (i = 0; i < ARRAY_SIZE(store_grf_gpio); i++)
	store_grf_gpio[i] =
	mmio_read_32(GRF_BASE + GRF_GPIO2A_IOMUX + i * 4);
	}

	void plat_rockchip_restore_gpio(void)
	{
	int i;
	uint32_t cru_gate_save;

	for (i = 0; i < ARRAY_SIZE(store_grf_gpio); i++)
	mmio_write_32(GRF_BASE + GRF_GPIO2A_IOMUX + i * 4,
	REG_SOC_WMSK \| store_grf_gpio[i]);

	cru_gate_save = mmio_read_32(CRU_BASE + CRU_CLKGATE_CON(31));

	/*
	* when shutdown logic, we need to save gpio2 ~ gpio4 register,
	* we need to enable gpio2 ~ gpio4 clock here, since it may be gating,
	* and we do not care gpio0 and gpio1 clock gate, since we never
	* gating them
	*/
	mmio_write_32(CRU_BASE + CRU_CLKGATE_CON(31),
	BITS_WITH_WMASK(0, 0x07, PCLK_GPIO2_GATE_SHIFT));

	for (i = 2; i < 5; i++) {
	mmio_write_32(gpio_port[i] + SWPORTA_DR,
	store_gpio[i - 2].swporta_dr);
	mmio_write_32(gpio_port[i] + SWPORTA_DDR,
	store_gpio[i - 2].swporta_ddr);
	mmio_write_32(gpio_port[i] + INTEN, store_gpio[i - 2].inten);
	mmio_write_32(gpio_port[i] + INTMASK,
	store_gpio[i - 2].intmask);
	mmio_write_32(gpio_port[i] + INTTYPE_LEVEL,
	store_gpio[i - 2].inttype_level);
	mmio_write_32(gpio_port[i] + INT_POLARITY,
	store_gpio[i - 2].int_polarity);
	mmio_write_32(gpio_port[i] + DEBOUNCE,
	store_gpio[i - 2].debounce);
	mmio_write_32(gpio_port[i] + LS_SYNC,
	store_gpio[i - 2].ls_sync);
	}
	mmio_write_32(CRU_BASE + CRU_CLKGATE_CON(31),
	cru_gate_save \| REG_SOC_WMSK);
	}

	const gpio_ops_t rk3399_gpio_ops = {
	.get_direction = get_direction,
	.set_direction = set_direction,
	.get_value = get_value,
	.set_value = set_value,
	.set_pull = set_pull,
	.get_pull = get_pull,
	};

	void plat_rockchip_gpio_init(void)
	{
	gpio_init(&rk3399_gpio_ops);
	}