Signed-off-by: Purna Chandra Mandal purna.mandal@microchip.com ---
drivers/pinctrl/Kconfig | 6 ++ drivers/pinctrl/Makefile | 1 + drivers/pinctrl/pinctrl_pic32.c | 173 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 180 insertions(+) create mode 100644 drivers/pinctrl/pinctrl_pic32.c
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig index 57e6142..a4acaf3 100644 --- a/drivers/pinctrl/Kconfig +++ b/drivers/pinctrl/Kconfig @@ -131,6 +131,12 @@ config PINCTRL_SANDBOX actually does nothing but print debug messages when pinctrl operations are invoked.
+config PIC32_PINCTRL + bool "Microchip PIC32 pin-control driver" + depends on DM && MACH_PIC32 + help + Support pin multiplexing control on Microchip PIC32 SoCs. + endif
source "drivers/pinctrl/uniphier/Kconfig" diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile index 70d25dc..b4f4650 100644 --- a/drivers/pinctrl/Makefile +++ b/drivers/pinctrl/Makefile @@ -9,3 +9,4 @@ obj-$(CONFIG_ARCH_ROCKCHIP) += rockchip/ obj-$(CONFIG_PINCTRL_SANDBOX) += pinctrl-sandbox.o
obj-$(CONFIG_ARCH_UNIPHIER) += uniphier/ +obj-$(CONFIG_PIC32_PINCTRL) += pinctrl_pic32.o diff --git a/drivers/pinctrl/pinctrl_pic32.c b/drivers/pinctrl/pinctrl_pic32.c new file mode 100644 index 0000000..fdf436c --- /dev/null +++ b/drivers/pinctrl/pinctrl_pic32.c @@ -0,0 +1,173 @@ +/* + * Pinctrl driver for Microchip PIC32 SoCs + * Copyright (c) 2015 Microchip Technology Inc. + * Written by Purna Chandra Mandal purna.mandal@microchip.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ +#include <common.h> +#include <dm.h> +#include <errno.h> +#include <syscon.h> +#include <asm/io.h> +#include <dm/pinctrl.h> +#include <dm/root.h> +#include <asm/arch-pic32/pic32.h> + +DECLARE_GLOBAL_DATA_PTR; + +enum { + PERIPH_ID_UART1, + PERIPH_ID_UART2, + PERIPH_ID_ETH, + PERIPH_ID_USB, + PERIPH_ID_SDHCI, + PERIPH_ID_I2C1, + PERIPH_ID_I2C2, + PERIPH_ID_SPI1, + PERIPH_ID_SPI2, + PERIPH_ID_SQI, +}; + +static void _eth_pin_config(void) +{ + /* + * PORT D pin configuration settings + * + * Reg Bit I/O Dig/Ana + * EMDC RD11 Output Digital + * ETXEN RD6 Output Digital + * + */ + writel(0x0840, ANSELCLR(PIC32_PORT_D)); /* set to digital mode */ + writel(0x0840, TRISCLR(PIC32_PORT_D)); /* set to output mode */ + + /* + * PORT H pin configuration settings + * + * Reg Bit I/O Dig/Ana PullUp/Down + * ECRSDV RH13 Input Digital + * ERXD0 RH8 Input Digital Down + * ERXD1 RH5 Input Digital Down + */ + writel(0x2120, ANSELCLR(PIC32_PORT_H)); /* set to digital mode */ + writel(0x2120, TRISSET(PIC32_PORT_H)); /* set to input mode */ + + /* + * PORT J pin configuration settings + * + * Reg Bit I/O Dig/Ana + * EREFCLK RJ11 Input Digital + * ETXD1 RJ9 Output Digital + * ETXD0 RJ8 Output Digital + * EMDIO RJ1 Input Digital + * + */ + writel(0x0b02, ANSELCLR(PIC32_PORT_J)); /* set to digital mode */ + writel(0x0300, TRISCLR(PIC32_PORT_J)); /* set pins to output mode */ + writel(0x0802, TRISSET(PIC32_PORT_J)); /* set pins to input mode */ + + /* + * PORT F pin configuration settings + * Reg Bit I/O Dig/Ana + * ERXERR RF3 Input Digital + */ + writel(0x10, ANSELCLR(PIC32_PORT_F)); /* set to digital mode */ + writel(0x10, TRISSET(PIC32_PORT_F)); /* set to input mode */ +} + +static int pic32_pinctrl_request(struct udevice *dev, int func, int flags) +{ + switch (func) { + case PERIPH_ID_UART2: + /* PPS for U2 RX/TX */ + writel(0x0002, RPG9R); /* G9 */ + writel(0x0005, U2RXR); /* B0 */ + /* digital mode */ + writel(0x0001, ANSELCLR(PIC32_PORT_B)); + writel(0x0200, ANSELCLR(PIC32_PORT_G)); + break; + case PERIPH_ID_ETH: + _eth_pin_config(); + break; + case PERIPH_ID_SDHCI: + break; + case PERIPH_ID_USB: + break; + default: + debug("%s: unknown-unhandled case\n", __func__); + break; + } + + return 0; +} + +static int pic32_pinctrl_get_periph_id(struct udevice *dev, + struct udevice *periph) +{ + int ret; + u32 cell[2]; + + ret = fdtdec_get_int_array(gd->fdt_blob, periph->of_offset, + "interrupts", cell, ARRAY_SIZE(cell)); + if (ret < 0) + return -EINVAL; + + /* interrupt number */ + switch (cell[0]) { + case 112 ... 114: + return PERIPH_ID_UART1; + case 145 ... 147: + return PERIPH_ID_UART2; + case 109 ... 111: + return PERIPH_ID_SPI1; + case 142 ... 144: + return PERIPH_ID_SPI2; + case 115 ... 117: + return PERIPH_ID_I2C1; + case 148 ... 150: + return PERIPH_ID_I2C2; + case 132 ... 133: + return PERIPH_ID_USB; + case 169: + return PERIPH_ID_SQI; + case 191: + return PERIPH_ID_SDHCI; + case 153: + return PERIPH_ID_ETH; + default: + break; + } + + return -ENOENT; +} + +static int pic32_pinctrl_set_state_simple(struct udevice *dev, + struct udevice *periph) +{ + int func; + + debug("%s: periph %s\n", __func__, periph->name); + func = pic32_pinctrl_get_periph_id(dev, periph); + if (func < 0) + return func; + return pic32_pinctrl_request(dev, func, 0); +} + +static struct pinctrl_ops pic32_pinctrl_ops = { + .set_state_simple = pic32_pinctrl_set_state_simple, + .request = pic32_pinctrl_request, + .get_periph_id = pic32_pinctrl_get_periph_id, +}; + +static const struct udevice_id pic32_pinctrl_ids[] = { + { .compatible = "microchip,pic32mzda-pinctrl" }, + { } +}; + +U_BOOT_DRIVER(pinctrl_pic32) = { + .name = "pinctrl_pic32", + .id = UCLASS_PINCTRL, + .of_match = pic32_pinctrl_ids, + .ops = &pic32_pinctrl_ops, +};