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new 05842e726f risc-v/bl808: Add GPIO Driver
05842e726f is described below
commit 05842e726f36d006b3459c4ba25a4e063408dad0
Author: rushabhvg <rushab...@gmail.com>
AuthorDate: Wed Jun 26 23:50:46 2024 +0530
risc-v/bl808: Add GPIO Driver
- This PR adds the GPIO Driver for BL808 SoC. This will be used by the
upcoming LED Driver for Ox64 Board.
- The BL808 GPIO Driver was derived from the NuttX Driver for BL602 GPIO
Co-Authored-By: Lup Yuen Lee <lu...@appkaki.com>
---
arch/risc-v/src/bl808/Make.defs | 2 +-
arch/risc-v/src/bl808/bl808_gpio.c | 143 +++++++++++++++++
arch/risc-v/src/bl808/bl808_gpio.h | 188 +++++++++++++++++++++++
arch/risc-v/src/bl808/hardware/bl808_memorymap.h | 2 +-
4 files changed, 333 insertions(+), 2 deletions(-)
diff --git a/arch/risc-v/src/bl808/Make.defs b/arch/risc-v/src/bl808/Make.defs
index 099b712988..8303bf2bb3 100644
--- a/arch/risc-v/src/bl808/Make.defs
+++ b/arch/risc-v/src/bl808/Make.defs
@@ -27,5 +27,5 @@ HEAD_ASRC = bl808_head.S
# Specify our C code within this directory to be included
CHIP_CSRCS = bl808_start.c bl808_irq_dispatch.c bl808_irq.c
CHIP_CSRCS += bl808_timerisr.c bl808_allocateheap.c
-CHIP_CSRCS += bl808_mm_init.c bl808_pgalloc.c bl808_serial.c
+CHIP_CSRCS += bl808_gpio.c bl808_mm_init.c bl808_pgalloc.c bl808_serial.c
CHIP_CSRCS += bl808_courier.c
diff --git a/arch/risc-v/src/bl808/bl808_gpio.c
b/arch/risc-v/src/bl808/bl808_gpio.c
new file mode 100644
index 0000000000..e1a5452fd4
--- /dev/null
+++ b/arch/risc-v/src/bl808/bl808_gpio.c
@@ -0,0 +1,143 @@
+/****************************************************************************
+ * arch/risc-v/src/bl808/bl808_gpio.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership. The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <debug.h>
+#include <sys/param.h>
+
+#include "riscv_internal.h"
+#include "hardware/bl808_glb.h"
+#include "bl808_gpio.h"
+#include "bl808_memorymap.h"
+
+#define BL808_NGPIOS 45
+#define GPIO_O_SHIFT 24
+#define GPIO_I_SHIFT 28
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: bl808_configgpio
+ *
+ * Description:
+ * Configure a GPIO pin based on encoded pin attributes.
+ *
+ ****************************************************************************/
+
+int bl808_configgpio(int pin, gpio_pinattr_t attr)
+{
+ uintptr_t regaddr;
+ uint32_t cfg = 0;
+
+ DEBUGASSERT(pin >= 0 && pin <= BL808_NGPIOS);
+
+ if (attr & GPIO_INPUT)
+ {
+ cfg |= GPIO_CFGCTL0_GPIO_0_IE;
+ }
+ else
+ {
+ cfg |= GPIO_CFGCTL0_GPIO_0_OE;
+ }
+
+ if (attr & GPIO_PULLUP)
+ {
+ cfg |= GPIO_CFGCTL0_GPIO_0_PU;
+ }
+
+ if (attr & GPIO_PULLDOWN)
+ {
+ cfg |= GPIO_CFGCTL0_GPIO_0_PD;
+ }
+
+ if (attr & GPIO_DRV_MASK)
+ {
+ cfg |= ((attr & GPIO_DRV_MASK) >> GPIO_DRV_SHIFT) <<
+ GPIO_CFGCTL0_GPIO_0_DRV_SHIFT;
+ }
+
+ if (attr & GPIO_SMT_EN)
+ {
+ cfg |= GPIO_CFGCTL0_GPIO_0_SMT;
+ }
+
+ if (attr & GPIO_FUNC_MASK)
+ {
+ cfg |= ((attr & GPIO_FUNC_MASK) >> GPIO_FUNC_SHIFT) <<
+ GPIO_CFGCTL0_GPIO_0_FUNC_SEL_SHIFT;
+ }
+
+ regaddr = BL808_GPIO_BASE + (pin * 4);
+ putreg32(cfg, regaddr);
+ return OK;
+}
+
+/****************************************************************************
+ * Name: bl808_gpiowrite
+ *
+ * Description:
+ * Write one or zero to the selected GPIO pin
+ *
+ ****************************************************************************/
+
+void bl808_gpiowrite(int pin, bool value)
+{
+ uintptr_t regaddr;
+
+ DEBUGASSERT(pin >= 0 && pin <= BL808_NGPIOS);
+
+ regaddr = BL808_GPIO_BASE + (pin * 4);
+ if (value)
+ {
+ modifyreg32(regaddr, 0, (1 << GPIO_O_SHIFT));
+ }
+ else
+ {
+ modifyreg32(regaddr, (1 << GPIO_O_SHIFT), 0);
+ }
+}
+
+/****************************************************************************
+ * Name: bl808_gpioread
+ *
+ * Description:
+ * Read one or zero from the selected GPIO pin
+ *
+ ****************************************************************************/
+
+bool bl808_gpioread(int pin)
+{
+ uintptr_t regaddr;
+ uint32_t regval;
+
+ DEBUGASSERT(pin >= 0 && pin <= BL808_NGPIOS);
+
+ regaddr = BL808_GPIO_BASE + (pin * 4);
+ regval = getreg32(regaddr);
+ return (regval & (1 << GPIO_I_SHIFT)) != 0;
+}
+
diff --git a/arch/risc-v/src/bl808/bl808_gpio.h
b/arch/risc-v/src/bl808/bl808_gpio.h
new file mode 100644
index 0000000000..f9b25c88bd
--- /dev/null
+++ b/arch/risc-v/src/bl808/bl808_gpio.h
@@ -0,0 +1,188 @@
+/****************************************************************************
+ * arch/risc-v/src/bl808/bl808_gpio.h
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership. The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#ifndef __ARCH_RISCV_SRC_BL808_BL808_GPIO_H
+#define __ARCH_RISCV_SRC_BL808_BL808_GPIO_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <stdbool.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Pre-Processor Declarations
+ ****************************************************************************/
+
+/* Encoded GPIO Attributes
+ *
+ * 1111 1100 0000 0000
+ * 5432 1098 7654 3210
+ * ---- ---- ---- ----
+ * .... ..MU UDDS FFFF
+ */
+
+/* Mode:
+ *
+ * 1111 1100 0000 0000
+ * 5432 1098 7654 3210
+ * ---- ---- ---- ----
+ * .... ..M. .... ....
+ */
+
+#define GPIO_MODE_SHIFT (9) /* Bit 9: Port Mode */
+#define GPIO_MODE_MASK (1 << GPIO_MODE_SHIFT)
+# define GPIO_INPUT (1 << GPIO_MODE_SHIFT) /* Input Enable */
+# define GPIO_OUTPUT (0 << GPIO_MODE_SHIFT) /* Output Enable */
+
+/* Input/Output pull-ups/downs:
+ *
+ * 1111 1100 0000 0000
+ * 5432 1098 7654 3210
+ * ---- ---- ---- ----
+ * .... ...U U... ....
+ */
+
+#define GPIO_PUPD_SHIFT (7) /* Bits 7-8: Pull-up/down */
+#define GPIO_PUPD_MASK (3 << GPIO_PUPD_SHIFT)
+#define GPIO_FLOAT (0 << GPIO_PUPD_SHIFT) /* No pull-up, pull-down */
+#define GPIO_PULLUP (1 << GPIO_PUPD_SHIFT) /* Pull-up */
+#define GPIO_PULLDOWN (2 << GPIO_PUPD_SHIFT) /* Pull-down */
+
+/* Drive:
+ *
+ * 1111 1100 0000 0000
+ * 5432 1098 7654 3210
+ * ---- ---- ---- ----
+ * .... .... .DD. ....
+ */
+
+#define GPIO_DRV_SHIFT (5) /* Bits 5-6: Drive */
+#define GPIO_DRV_MASK (3 << GPIO_DRV_SHIFT)
+#define GPIO_DRV_0 (0 << GPIO_DRV_SHIFT)
+#define GPIO_DRV_1 (1 << GPIO_DRV_SHIFT)
+#define GPIO_DRV_2 (2 << GPIO_DRV_SHIFT)
+#define GPIO_DRV_3 (3 << GPIO_DRV_SHIFT)
+
+/* Input Schmitt trigger:
+ *
+ * 1111 1100 0000 0000
+ * 5432 1098 7654 3210
+ * ---- ---- ---- ----
+ * .... .... ...S ....
+ */
+
+#define GPIO_SMT_SHIFT (4) /* Bit 4: SMT Enable */
+#define GPIO_SMT_MASK (3 << GPIO_SMT_SHIFT)
+#define GPIO_SMT_DIS (0 << GPIO_SMT_SHIFT)
+#define GPIO_SMT_EN (1 << GPIO_SMT_SHIFT)
+
+/* GPIO type selection:
+ *
+ * 1111 1100 0000 0000
+ * 5432 1098 7654 3210
+ * ---- ---- ---- ----
+ * .... .... .... FFFF
+ */
+
+#define GPIO_FUNC_SHIFT (0) /* Bits 0-3: GPIO Type */
+#define GPIO_FUNC_MASK (15 << GPIO_FUNC_SHIFT)
+#define GPIO_FUNC_SDIO (1 << GPIO_FUNC_SHIFT) /* SDIO */
+#define GPIO_FUNC_FLASH (2 << GPIO_FUNC_SHIFT) /* Flash */
+#define GPIO_FUNC_SPI (4 << GPIO_FUNC_SHIFT) /* SPI */
+#define GPIO_FUNC_I2C (6 << GPIO_FUNC_SHIFT) /* I2C */
+#define GPIO_FUNC_UART (7 << GPIO_FUNC_SHIFT) /* UART */
+#define GPIO_FUNC_PWM (8 << GPIO_FUNC_SHIFT) /* PWM */
+#define GPIO_FUNC_EXT_PA (9 << GPIO_FUNC_SHIFT) /* Analog */
+#define GPIO_FUNC_ANA (10 << GPIO_FUNC_SHIFT) /* Analog */
+#define GPIO_FUNC_SWGPIO (11 << GPIO_FUNC_SHIFT) /* Software GPIO */
+#define GPIO_FUNC_JTAG (14 << GPIO_FUNC_SHIFT) /* JTAG */
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+/* Must be big enough to hold the above encodings */
+
+typedef uint16_t gpio_pinattr_t;
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: bl808_configgpio
+ *
+ * Description:
+ * Configure a GPIO pin based on encoded pin attributes.
+ *
+ ****************************************************************************/
+
+int bl808_configgpio(int pin, gpio_pinattr_t attr);
+
+/****************************************************************************
+ * Name: bl808_gpiowrite
+ *
+ * Description:
+ * Write one or zero to the selected GPIO pin
+ *
+ ****************************************************************************/
+
+void bl808_gpiowrite(int pin, bool value);
+
+/****************************************************************************
+ * Name: bl808_gpioread
+ *
+ * Description:
+ * Read one or zero from the selected GPIO pin
+ *
+ ****************************************************************************/
+
+bool bl808_gpioread(int pin);
+
+#ifdef __cplusplus
+}
+#endif
+#undef EXTERN
+
+#endif /* __ASSEMBLY__ */
+#endif /* __ARCH_RISCV_SRC_BL808_BL808_GPIO_H */
diff --git a/arch/risc-v/src/bl808/hardware/bl808_memorymap.h
b/arch/risc-v/src/bl808/hardware/bl808_memorymap.h
index d02e01be12..191fb939f3 100644
--- a/arch/risc-v/src/bl808/hardware/bl808_memorymap.h
+++ b/arch/risc-v/src/bl808/hardware/bl808_memorymap.h
@@ -28,7 +28,7 @@
/* Register Base Address ****************************************************/
#define BL808_GLB_BASE 0x20000000ul
-
+#define BL808_GPIO_BASE 0x200008c4ul
#define BL808_UART0_BASE 0x2000a000ul
#define BL808_UART1_BASE 0x2000a100ul
#define BL808_UART2_BASE 0x2000aa00ul
