--- /dev/null
+/*
+ * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of ARM nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <assert.h>
+#include <debug.h>
+#include <delay_timer.h>
+#include <errno.h>
+#include <gpio.h>
+#include <mmio.h>
+#include <platform.h>
+#include <platform_def.h>
+#include <plat_private.h>
+#include <soc.h>
+
+uint32_t gpio_port[] = {
+ GPIO0_BASE,
+ GPIO1_BASE,
+ GPIO2_BASE,
+ GPIO3_BASE,
+ GPIO4_BASE,
+};
+
+#define SWPORTA_DR 0x00
+#define SWPORTA_DDR 0x04
+#define EXT_PORTA 0x50
+
+#define PMU_GPIO_PORT0 0
+#define PMU_GPIO_PORT1 1
+
+#define PMU_GRF_GPIO0A_P 0x40
+#define GRF_GPIO2A_P 0xe040
+#define GPIO_P_MASK 0x03
+
+/*
+ * gpio clock disabled when not operate
+ * so need to enable gpio clock before operate gpio
+ * after setting, need to disable gpio clock
+ * gate 1: disable clock; 0: enable clock
+ */
+static void gpio_clk(int gpio, uint32_t gate)
+{
+ uint32_t port = gpio / 32;
+
+ assert(port < 5);
+
+ switch (port) {
+ case 0:
+ mmio_write_32(PMUCRU_BASE + CRU_PMU_CLKGATE_CON(1),
+ BITS_WITH_WMASK(gate, CLK_GATE_MASK,
+ PCLK_GPIO0_GATE_SHIFT));
+ break;
+ case 1:
+ mmio_write_32(PMUCRU_BASE + CRU_PMU_CLKGATE_CON(1),
+ BITS_WITH_WMASK(gate, CLK_GATE_MASK,
+ PCLK_GPIO1_GATE_SHIFT));
+ break;
+ case 2:
+ mmio_write_32(CRU_BASE + CRU_CLKGATE_CON(31),
+ BITS_WITH_WMASK(gate, CLK_GATE_MASK,
+ PCLK_GPIO2_GATE_SHIFT));
+ break;
+ case 3:
+ mmio_write_32(CRU_BASE + CRU_CLKGATE_CON(31),
+ BITS_WITH_WMASK(gate, CLK_GATE_MASK,
+ PCLK_GPIO3_GATE_SHIFT));
+
+ break;
+ case 4:
+ mmio_write_32(CRU_BASE + CRU_CLKGATE_CON(31),
+ BITS_WITH_WMASK(gate, CLK_GATE_MASK,
+ PCLK_GPIO4_GATE_SHIFT));
+ break;
+ default:
+ break;
+ }
+}
+
+static void set_pull(int gpio, int pull)
+{
+ uint32_t port = gpio / 32;
+ uint32_t num = gpio % 32;
+ uint32_t bank = num / 8;
+ uint32_t id = num % 8;
+
+ assert((port < 5) && (num < 32));
+
+ gpio_clk(gpio, 0);
+
+ /*
+ * 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 > 2))) {
+ 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_clk(gpio, 1);
+}
+
+static void set_direction(int gpio, int direction)
+{
+ uint32_t port = gpio / 32;
+ uint32_t num = gpio % 32;
+
+ assert((port < 5) && (num < 32));
+
+ gpio_clk(gpio, 0);
+
+ /*
+ * 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_clk(gpio, 1);
+}
+
+static int get_direction(int gpio)
+{
+ uint32_t port = gpio / 32;
+ uint32_t num = gpio % 32;
+ int direction;
+
+ assert((port < 5) && (num < 32));
+
+ gpio_clk(gpio, 0);
+
+ /*
+ * 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_clk(gpio, 1);
+
+ return direction;
+}
+
+static int get_value(int gpio)
+{
+ uint32_t port = gpio / 32;
+ uint32_t num = gpio % 32;
+ int value;
+
+ assert((port < 5) && (num < 32));
+
+ gpio_clk(gpio, 0);
+ value = (mmio_read_32(gpio_port[port] + EXT_PORTA) >> num) & 0x1;
+ gpio_clk(gpio, 1);
+
+ return value;
+}
+
+static void set_value(int gpio, int value)
+{
+ uint32_t port = gpio / 32;
+ uint32_t num = gpio % 32;
+
+ assert((port < 5) && (num < 32));
+
+ gpio_clk(gpio, 0);
+ mmio_clrsetbits_32(gpio_port[port] + SWPORTA_DR, 1 << num,
+ !!value << num);
+ gpio_clk(gpio, 0);
+}
+
+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,
+};
+
+void plat_rockchip_gpio_init(void)
+{
+ gpio_init(&rk3399_gpio_ops);
+}
projects / project / bcm63xx / atf.git / commitdiff