rockchip: set gpio2 ~ gpio4 to input and pull none mode

For save power cosumption, if gpio power supply shut down, we need to
set gpio2 ~ gpio4 to input and HiZ status when suspend, and recovery
they status when rusume. we do it base on apio pass from loader.

Change-Id: I59fd2395e5e37e63425472a39f519822c9197e4c

5 files changed, 208 insertions, 4 deletions

diff --git a/plat/rockchip/common/include/plat_params.h b/plat/rockchip/common/include/plat_params.h
index 7e1f275f..8c647968 100644
--- a/plat/rockchip/common/include/plat_params.h
+++ b/plat/rockchip/common/include/plat_params.h
@@ -79,6 +79,15 @@ enum {
 	PARAM_RESET,
 	PARAM_POWEROFF,
 	PARAM_SUSPEND_GPIO,
+	PARAM_SUSPEND_APIO,
+};
+
+struct apio_info {
+	uint8_t apio1 : 1;
+	uint8_t apio2 : 1;
+	uint8_t apio3 : 1;
+	uint8_t apio4 : 1;
+	uint8_t apio5 : 1;
 };
 
 struct gpio_info {
@@ -99,4 +108,9 @@ struct bl31_gpio_param {
 	struct gpio_info gpio;
 };
 
+struct bl31_apio_param {
+	struct bl31_plat_param h;
+	struct apio_info apio;
+};
+
 #endif /* __PLAT_PARAMS_H__ */
diff --git a/plat/rockchip/common/include/plat_private.h b/plat/rockchip/common/include/plat_private.h
index 4f87a760..ad012666 100644
--- a/plat/rockchip/common/include/plat_private.h
+++ b/plat/rockchip/common/include/plat_private.h
@@ -124,6 +124,7 @@ void platform_cpu_warmboot(void);
 struct gpio_info *plat_get_rockchip_gpio_reset(void);
 struct gpio_info *plat_get_rockchip_gpio_poweroff(void);
 struct gpio_info *plat_get_rockchip_suspend_gpio(uint32_t *count);
+struct apio_info *plat_get_rockchip_suspend_apio(void);
 void plat_rockchip_gpio_init(void);
 
 extern const unsigned char rockchip_power_domain_tree_desc[];
diff --git a/plat/rockchip/common/params_setup.c b/plat/rockchip/common/params_setup.c
index 351d2136..646c1e13 100644
--- a/plat/rockchip/common/params_setup.c
+++ b/plat/rockchip/common/params_setup.c
@@ -42,10 +42,12 @@
 
 static struct gpio_info param_reset;
 static struct gpio_info param_poweroff;
+static struct bl31_apio_param param_apio;
 static struct gpio_info *rst_gpio;
 static struct gpio_info *poweroff_gpio;
 static struct gpio_info suspend_gpio[10];
 uint32_t suspend_gpio_cnt;
+static struct apio_info *suspend_apio;
 
 struct gpio_info *plat_get_rockchip_gpio_reset(void)
 {
@@ -64,6 +66,11 @@ struct gpio_info *plat_get_rockchip_suspend_gpio(uint32_t *count)
 	return &suspend_gpio[0];
 }
 
+struct apio_info *plat_get_rockchip_suspend_apio(void)
+{
+	return suspend_apio;
+}
+
 void params_early_setup(void *plat_param_from_bl2)
 {
 	struct bl31_plat_param *bl2_param;
@@ -96,6 +103,11 @@ void params_early_setup(void *plat_param_from_bl2)
 			       sizeof(struct gpio_info));
 			suspend_gpio_cnt++;
 			break;
+		case PARAM_SUSPEND_APIO:
+			memcpy(&param_apio, bl2_param,
+			       sizeof(struct bl31_apio_param));
+			suspend_apio = &param_apio.apio;
+			break;
 		default:
 			ERROR("not expected type found %ld\n",
 			      bl2_param->type);
diff --git a/plat/rockchip/rk3399/drivers/pmu/pmu.c b/plat/rockchip/rk3399/drivers/pmu/pmu.c
index d2dfdf20..609a30d1 100755
--- a/plat/rockchip/rk3399/drivers/pmu/pmu.c
+++ b/plat/rockchip/rk3399/drivers/pmu/pmu.c
@@ -874,6 +874,159 @@ static void clr_hw_idle(uint32_t hw_idle)
 	mmio_clrbits_32(PMU_BASE + PMU_BUS_CLR, hw_idle);
 }
 
+static uint32_t iomux_status[12];
+static uint32_t pull_mode_status[12];
+static uint32_t gpio_direction[3];
+static uint32_t gpio_2_4_clk_gate;
+
+static void suspend_apio(void)
+{
+	struct apio_info *suspend_apio;
+	int i;
+
+	suspend_apio = plat_get_rockchip_suspend_apio();
+
+	if (!suspend_apio)
+		return;
+
+	/* save gpio2 ~ gpio4 iomux and pull mode */
+	for (i = 0; i < 12; i++) {
+		iomux_status[i] = mmio_read_32(GRF_BASE +
+				GRF_GPIO2A_IOMUX + i * 4);
+		pull_mode_status[i] = mmio_read_32(GRF_BASE +
+				GRF_GPIO2A_P + i * 4);
+	}
+
+	/* store gpio2 ~ gpio4 clock gate state */
+	gpio_2_4_clk_gate = (mmio_read_32(CRU_BASE + CRU_CLKGATE_CON(31)) >>
+				PCLK_GPIO2_GATE_SHIFT) & 0x07;
+
+	/* enable gpio2 ~ gpio4 clock gate */
+	mmio_write_32(CRU_BASE + CRU_CLKGATE_CON(31),
+		      BITS_WITH_WMASK(0, 0x07, PCLK_GPIO2_GATE_SHIFT));
+
+	/* save gpio2 ~ gpio4 direction */
+	gpio_direction[0] = mmio_read_32(GPIO2_BASE + 0x04);
+	gpio_direction[1] = mmio_read_32(GPIO3_BASE + 0x04);
+	gpio_direction[2] = mmio_read_32(GPIO4_BASE + 0x04);
+
+	/* apio1 charge gpio3a0 ~ gpio3c7 */
+	if (suspend_apio->apio1) {
+
+		/* set gpio3a0 ~ gpio3c7 iomux to gpio */
+		mmio_write_32(GRF_BASE + GRF_GPIO3A_IOMUX,
+			      REG_SOC_WMSK | GRF_IOMUX_GPIO);
+		mmio_write_32(GRF_BASE + GRF_GPIO3B_IOMUX,
+			      REG_SOC_WMSK | GRF_IOMUX_GPIO);
+		mmio_write_32(GRF_BASE + GRF_GPIO3C_IOMUX,
+			      REG_SOC_WMSK | GRF_IOMUX_GPIO);
+
+		/* set gpio3a0 ~ gpio3c7 pull mode to pull none */
+		mmio_write_32(GRF_BASE + GRF_GPIO3A_P, REG_SOC_WMSK | 0);
+		mmio_write_32(GRF_BASE + GRF_GPIO3B_P, REG_SOC_WMSK | 0);
+		mmio_write_32(GRF_BASE + GRF_GPIO3C_P, REG_SOC_WMSK | 0);
+
+		/* set gpio3a0 ~ gpio3c7 to input */
+		mmio_clrbits_32(GPIO3_BASE + 0x04, 0x00ffffff);
+	}
+
+	/* apio2 charge gpio2a0 ~ gpio2b4 */
+	if (suspend_apio->apio2) {
+
+		/* set gpio2a0 ~ gpio2b4 iomux to gpio */
+		mmio_write_32(GRF_BASE + GRF_GPIO2A_IOMUX,
+			      REG_SOC_WMSK | GRF_IOMUX_GPIO);
+		mmio_write_32(GRF_BASE + GRF_GPIO2B_IOMUX,
+			      REG_SOC_WMSK | GRF_IOMUX_GPIO);
+
+		/* set gpio2a0 ~ gpio2b4 pull mode to pull none */
+		mmio_write_32(GRF_BASE + GRF_GPIO2A_P, REG_SOC_WMSK | 0);
+		mmio_write_32(GRF_BASE + GRF_GPIO2B_P, REG_SOC_WMSK | 0);
+
+		/* set gpio2a0 ~ gpio2b4 to input */
+		mmio_clrbits_32(GPIO2_BASE + 0x04, 0x00001fff);
+	}
+
+	/* apio3 charge gpio2c0 ~ gpio2d4*/
+	if (suspend_apio->apio3) {
+
+		/* set gpio2a0 ~ gpio2b4 iomux to gpio */
+		mmio_write_32(GRF_BASE + GRF_GPIO2C_IOMUX,
+			      REG_SOC_WMSK | GRF_IOMUX_GPIO);
+		mmio_write_32(GRF_BASE + GRF_GPIO2D_IOMUX,
+			      REG_SOC_WMSK | GRF_IOMUX_GPIO);
+
+		/* set gpio2c0 ~ gpio2d4 pull mode to pull none */
+		mmio_write_32(GRF_BASE + GRF_GPIO2C_P, REG_SOC_WMSK | 0);
+		mmio_write_32(GRF_BASE + GRF_GPIO2D_P, REG_SOC_WMSK | 0);
+
+		/* set gpio2c0 ~ gpio2d4 to input */
+		mmio_clrbits_32(GPIO2_BASE + 0x04, 0x1fff0000);
+	}
+
+	/* apio4 charge gpio4c0 ~ gpio4c7, gpio4d0 ~ gpio4d6 */
+	if (suspend_apio->apio4) {
+
+		/* set gpio4c0 ~ gpio4d6 iomux to gpio */
+		mmio_write_32(GRF_BASE + GRF_GPIO4C_IOMUX,
+			      REG_SOC_WMSK | GRF_IOMUX_GPIO);
+		mmio_write_32(GRF_BASE + GRF_GPIO4D_IOMUX,
+			      REG_SOC_WMSK | GRF_IOMUX_GPIO);
+
+		/* set gpio4c0 ~ gpio4d6 pull mode to pull none */
+		mmio_write_32(GRF_BASE + GRF_GPIO4C_P, REG_SOC_WMSK | 0);
+		mmio_write_32(GRF_BASE + GRF_GPIO4D_P, REG_SOC_WMSK | 0);
+
+		/* set gpio4c0 ~ gpio4d6 to input */
+		mmio_clrbits_32(GPIO4_BASE + 0x04, 0x7fff0000);
+	}
+
+	/* apio5 charge gpio3d0 ~ gpio3d7, gpio4a0 ~ gpio4a7*/
+	if (suspend_apio->apio5) {
+		/* set gpio3d0 ~ gpio4a7 iomux to gpio */
+		mmio_write_32(GRF_BASE + GRF_GPIO3D_IOMUX,
+			      REG_SOC_WMSK | GRF_IOMUX_GPIO);
+		mmio_write_32(GRF_BASE + GRF_GPIO4A_IOMUX,
+			      REG_SOC_WMSK | GRF_IOMUX_GPIO);
+
+		/* set gpio3d0 ~ gpio4a7 pull mode to pull none */
+		mmio_write_32(GRF_BASE + GRF_GPIO3D_P, REG_SOC_WMSK | 0);
+		mmio_write_32(GRF_BASE + GRF_GPIO4A_P, REG_SOC_WMSK | 0);
+
+		/* set gpio4c0 ~ gpio4d6 to input */
+		mmio_clrbits_32(GPIO3_BASE + 0x04, 0xff000000);
+		mmio_clrbits_32(GPIO4_BASE + 0x04, 0x000000ff);
+	}
+}
+
+static void resume_apio(void)
+{
+	struct apio_info *suspend_apio;
+	int i;
+
+	suspend_apio = plat_get_rockchip_suspend_apio();
+
+	if (!suspend_apio)
+		return;
+
+	for (i = 0; i < 12; i++) {
+		mmio_write_32(GRF_BASE + GRF_GPIO2A_P + i * 4,
+			      REG_SOC_WMSK | pull_mode_status[i]);
+		mmio_write_32(GRF_BASE + GRF_GPIO2A_IOMUX + i * 4,
+			      REG_SOC_WMSK | iomux_status[i]);
+	}
+
+	/* set gpio2 ~ gpio4 direction back to store value */
+	mmio_write_32(GPIO2_BASE + 0x04, gpio_direction[0]);
+	mmio_write_32(GPIO3_BASE + 0x04, gpio_direction[1]);
+	mmio_write_32(GPIO4_BASE + 0x04, gpio_direction[2]);
+
+	/* set gpio2 ~ gpio4 clock gate back to store value */
+	mmio_write_32(CRU_BASE + CRU_CLKGATE_CON(31),
+		      BITS_WITH_WMASK(gpio_2_4_clk_gate, 0x07,
+				      PCLK_GPIO2_GATE_SHIFT));
+}
+
 static void suspend_gpio(void)
 {
 	struct gpio_info *suspend_gpio;
@@ -950,7 +1103,6 @@ static int sys_pwr_domain_suspend(void)
 		}
 	}
 	mmio_setbits_32(PMU_BASE + PMU_PWRDN_CON, BIT(PMU_SCU_B_PWRDWN_EN));
-
 	/*
 	 * Disabling PLLs/PWM/DVFS is approaching WFI which is
 	 * the last steps in suspend.
@@ -959,6 +1111,7 @@ static int sys_pwr_domain_suspend(void)
 	disable_dvfs_plls();
 	disable_pwms();
 	disable_nodvfs_plls();
+	suspend_apio();
 	suspend_gpio();
 
 	return 0;
@@ -969,7 +1122,7 @@ static int sys_pwr_domain_resume(void)
 	uint32_t wait_cnt = 0;
 	uint32_t status = 0;
 
-
+	resume_apio();
 	resume_gpio();
 	enable_nodvfs_plls();
 	enable_pwms();
@@ -986,7 +1139,6 @@ static int sys_pwr_domain_resume(void)
 	 * somewhere.
 	 */
 	mmio_write_32(PMU_BASE + PMU_WAKEUP_STATUS, 0xffffffff);
-
 	mmio_write_32(PMU_BASE + PMU_WKUP_CFG4, 0x00);
 
 	mmio_write_32(SGRF_BASE + SGRF_SOC_CON0_1(1),
diff --git a/plat/rockchip/rk3399/drivers/pmu/pmu.h b/plat/rockchip/rk3399/drivers/pmu/pmu.h
index 65fe7dbe..ab2896b1 100644
--- a/plat/rockchip/rk3399/drivers/pmu/pmu.h
+++ b/plat/rockchip/rk3399/drivers/pmu/pmu.h
@@ -875,7 +875,32 @@ enum pmu_core_pwr_st {
 #define MAX_WAIT_COUNT		1000
 
 #define	GRF_SOC_CON4		0x0e210
-#define GRF_GPIO4C_IOMUX	0x0e028
+
+#define GRF_GPIO2A_IOMUX	0xe000
+#define GRF_GPIO2B_IOMUX	0xe004
+#define GRF_GPIO2C_IOMUX	0xe008
+#define GRF_GPIO2D_IOMUX	0xe00c
+#define GRF_GPIO3A_IOMUX	0xe010
+#define GRF_GPIO3B_IOMUX	0xe014
+#define GRF_GPIO3C_IOMUX	0xe018
+#define GRF_GPIO3D_IOMUX	0xe01c
+#define GRF_GPIO4A_IOMUX	0xe020
+#define GRF_GPIO4B_IOMUX	0xe024
+#define GRF_GPIO4C_IOMUX	0xe028
+#define GRF_GPIO4D_IOMUX	0xe02c
+
+#define GRF_GPIO2A_P		0xe040
+#define GRF_GPIO2B_P		0xe044
+#define GRF_GPIO2C_P		0xe048
+#define GRF_GPIO2D_P		0xe04C
+#define GRF_GPIO3A_P		0xe050
+#define GRF_GPIO3B_P		0xe054
+#define GRF_GPIO3C_P		0xe058
+#define GRF_GPIO3D_P		0xe05C
+#define GRF_GPIO4A_P		0xe060
+#define GRF_GPIO4B_P		0xe064
+#define GRF_GPIO4C_P		0xe068
+#define GRF_GPIO4D_P		0xe06C
 
 #define PMUGRF_GPIO0A_SMT	0x0120
 #define PMUGRF_SOC_CON0		0x0180