The UP Squared board <http://www.upboard.com> implements certain features (pin control) through an on-board FPGA. Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx> Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> Signed-off-by: larry.lai <larry.lai@xxxxxxxxxxxxxxx> --- PATCH V3 -> RFC 2022/11/23: (1) Refer 2022/11/09 Linus Walleij review, cleaned up coding style and addressed review comments. PATCH V2 -> V3: There's no change. PATCH V1 -> V2: (1) Synchronized with upboard github to rc2 (2) Refer 2022/10/19 Mark Brown and Andy Shevchenko review, we removed the regmap and acpi patches and implement in upboard pinctrl driver. (3) Refer 2022/10/19 Andy Shevchenko review, fixed the coding style issues, removed using gpio_xxxx API and removed including <linux/gpio.h>. --- drivers/pinctrl/Kconfig | 14 + drivers/pinctrl/Makefile | 1 + drivers/pinctrl/pinctrl-upboard.c | 1384 +++++++++++++++++++++++++++++ 3 files changed, 1399 insertions(+) create mode 100644 drivers/pinctrl/pinctrl-upboard.c diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig index 1cf74b0c42e5..cc8dae75289b 100644 --- a/drivers/pinctrl/Kconfig +++ b/drivers/pinctrl/Kconfig @@ -483,6 +483,20 @@ config PINCTRL_THUNDERBAY rate control and direction control. This module will be called as pinctrl-thunderbay. +config PINCTRL_UPBOARD + tristate "UP board FPGA pin controller" + depends on (X86 && ACPI) || COMPILE_TEST + depends on MFD_INTEL_UPBOARD_FPGA + select GENERIC_PINCONF + select PINMUX + select PINCONF + help + Pin controller for the FPGA GPIO lines on UP boards. Due to the + hardware layout, these are meant to be controlled in tandem with their + corresponding Intel SoC GPIOs. + To compile this driver as a module, choose M here: the module + will be called pinctrl-upboard. + config PINCTRL_ZYNQ bool "Pinctrl driver for Xilinx Zynq" depends on ARCH_ZYNQ diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile index e76f5cdc64b0..c366706d36e7 100644 --- a/drivers/pinctrl/Makefile +++ b/drivers/pinctrl/Makefile @@ -48,6 +48,7 @@ obj-$(CONFIG_PINCTRL_STMFX) += pinctrl-stmfx.o obj-$(CONFIG_PINCTRL_SX150X) += pinctrl-sx150x.o obj-$(CONFIG_PINCTRL_TB10X) += pinctrl-tb10x.o obj-$(CONFIG_PINCTRL_THUNDERBAY) += pinctrl-thunderbay.o +obj-$(CONFIG_PINCTRL_UPBOARD) += pinctrl-upboard.o obj-$(CONFIG_PINCTRL_ZYNQMP) += pinctrl-zynqmp.o obj-$(CONFIG_PINCTRL_ZYNQ) += pinctrl-zynq.o diff --git a/drivers/pinctrl/pinctrl-upboard.c b/drivers/pinctrl/pinctrl-upboard.c new file mode 100644 index 000000000000..e06151f4c128 --- /dev/null +++ b/drivers/pinctrl/pinctrl-upboard.c @@ -0,0 +1,1384 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * UP Board FPGA-based pin controller driver + * + * Copyright (c) 2017, Emutex Ltd. All rights reserved. + * Copyright (c) 2022, YunJingTech Ltd. + * + * Authors: Javier Arteaga <javier@xxxxxxxxxx> + * Dan O'Donovan <dan@xxxxxxxxxx> + * Nicola Lunghi <nicolal@xxxxxxxxxx> + * Gary Wang <garywang@xxxxxxxxxxxx> + */ + +#include <linux/acpi.h> +#include <linux/dmi.h> +#include <linux/gpio/consumer.h> +#include <linux/gpio/driver.h> +#include <linux/kernel.h> +#include <linux/mfd/upboard-fpga.h> +#include <linux/module.h> +#include <linux/pinctrl/pinctrl.h> +#include <linux/pinctrl/pinmux.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/interrupt.h> +#include <linux/string.h> + +#include "core.h" + +/* Offset from regs */ +#define REVID 0x000 +#define REVID_SHIFT 16 +#define REVID_MASK GENMASK(31, 16) + +#define CAPLIST 0x004 +#define CAPLIST_ID_SHIFT 16 +#define CAPLIST_ID_MASK GENMASK(23, 16) +#define CAPLIST_ID_GPIO_HW_INFO 1 +#define CAPLIST_ID_PWM 2 +#define CAPLIST_ID_BLINK 3 +#define CAPLIST_ID_EXP 4 +#define CAPLIST_NEXT_SHIFT 0 +#define CAPLIST_NEXT_MASK GENMASK(15, 0) + +#define PADBAR 0x00c + +#define PADOWN_BITS 4 +#define PADOWN_SHIFT(p) ((p) % 8 * PADOWN_BITS) +#define PADOWN_MASK(p) (GENMASK(3, 0) << PADOWN_SHIFT(p)) +#define PADOWN_GPP(p) ((p) / 8) + +/* Offset from pad_regs */ +#define PADCFG0 0x000 +#define PADCFG0_RXEVCFG_SHIFT 25 +#define PADCFG0_RXEVCFG_MASK GENMASK(26, 25) +#define PADCFG0_RXEVCFG_LEVEL 0 +#define PADCFG0_RXEVCFG_EDGE 1 +#define PADCFG0_RXEVCFG_DISABLED 2 +#define PADCFG0_RXEVCFG_EDGE_BOTH 3 +#define PADCFG0_PREGFRXSEL BIT(24) +#define PADCFG0_RXINV BIT(23) +#define PADCFG0_GPIROUTIOXAPIC BIT(20) +#define PADCFG0_GPIROUTSCI BIT(19) +#define PADCFG0_GPIROUTSMI BIT(18) +#define PADCFG0_GPIROUTNMI BIT(17) +#define PADCFG0_PMODE_SHIFT 10 +#define PADCFG0_PMODE_MASK GENMASK(13, 10) +#define PADCFG0_PMODE_GPIO 0 +#define PADCFG0_GPIORXDIS BIT(9) +#define PADCFG0_GPIOTXDIS BIT(8) +#define PADCFG0_GPIORXSTATE BIT(1) +#define PADCFG0_GPIOTXSTATE BIT(0) + +#define PADCFG1 0x004 +#define PADCFG1_TERM_UP BIT(13) +#define PADCFG1_TERM_SHIFT 10 +#define PADCFG1_TERM_MASK GENMASK(12, 10) +#define PADCFG1_TERM_20K BIT(2) +#define PADCFG1_TERM_5K BIT(1) +#define PADCFG1_TERM_1K BIT(0) +#define PADCFG1_TERM_833 (BIT(1) | BIT(0)) + +#define PADCFG2 0x008 +#define PADCFG2_DEBEN BIT(0) +#define PADCFG2_DEBOUNCE_SHIFT 1 +#define PADCFG2_DEBOUNCE_MASK GENMASK(4, 1) + +#define DEBOUNCE_PERIOD_NSEC 31250 + +/* Additional features supported by the hardware */ +#define PINCTRL_FEATURE_DEBOUNCE BIT(0) +#define PINCTRL_FEATURE_1K_PD BIT(1) + +#define pin_to_padno(c, p) ((p) - (c)->pin_base) +#define padgroup_offset(g, p) ((p) - (g)->base) + +struct intel_pinctrl { + struct device *dev; + raw_spinlock_t lock; + struct pinctrl_desc pctldesc; + struct pinctrl_dev *pctldev; + struct gpio_chip chip; + struct irq_chip irqchip; + void *soc; + void *communities; + size_t ncommunities; +}; + +struct upboard_pin { + struct regmap_field *funcbit; + struct regmap_field *enbit; + struct regmap_field *dirbit; + /* native pin controllers: number, base, irq */ + unsigned int gpio; + unsigned int base; + int irq; + void __iomem *regs; +}; + +struct upboard_pinctrl { + struct gpio_chip chip; + struct device *dev; + struct pinctrl_dev *pctldev; + struct pinctrl_desc *pctldesc; + struct upboard_pin *pins; + struct regmap *regmap; + const unsigned int *rpi_mapping; + int ident; +}; + +enum upboard_func0_fpgabit { + UPFPGA_I2C0_EN = 8, + UPFPGA_I2C1_EN = 9, + UPFPGA_CEC0_EN = 12, + UPFPGA_ADC0_EN = 14, +}; + +static const struct reg_field upboard_i2c0_reg = + REG_FIELD(UPFPGA_REG_FUNC_EN0, UPFPGA_I2C0_EN, UPFPGA_I2C0_EN); + +static const struct reg_field upboard_i2c1_reg = + REG_FIELD(UPFPGA_REG_FUNC_EN0, UPFPGA_I2C1_EN, UPFPGA_I2C1_EN); + +static const struct reg_field upboard_adc0_reg = + REG_FIELD(UPFPGA_REG_FUNC_EN0, UPFPGA_ADC0_EN, UPFPGA_ADC0_EN); + +/* Pin group information */ +struct upboard_pingroup { + const char *name; + const unsigned int *pins; + size_t npins; +}; + +/* Pin function information */ +struct upboard_function { + const char *name; + const char * const *groups; + size_t ngroups; +}; + +#define UPBOARD_BIT_TO_PIN(r, bit) \ + ((r) * UPFPGA_REGISTER_SIZE + (bit)) + +/* + * UP board data + */ + +#define UPBOARD_UP_BIT_TO_PIN(r, id) (UPBOARD_BIT_TO_PIN(r, UPFPGA_UP_##id)) + +#define UPBOARD_UP_PIN_ANON(r, bit) \ + { \ + .number = UPBOARD_BIT_TO_PIN(r, bit), \ + } + +#define UPBOARD_UP_PIN_NAME(r, id) \ + { \ + .number = UPBOARD_UP_BIT_TO_PIN(r, id), \ + .name = #id, \ + } + +#define UPBOARD_UP_PIN_FUNC(r, id, data) \ + { \ + .number = UPBOARD_UP_BIT_TO_PIN(r, id), \ + .name = #id, \ + .drv_data = (void *)(data), \ + } + +#define PIN_GROUP(n, p) \ + { \ + .name = (n), \ + .pins = (p), \ + .npins = ARRAY_SIZE((p)), \ + } + +#define FUNCTION(n, g) \ + { \ + .name = (n), \ + .groups = (g), \ + .ngroups = ARRAY_SIZE((g)), \ + } + +enum upboard_up_reg1_fpgabit { + UPFPGA_UP_I2C1_SDA, + UPFPGA_UP_I2C1_SCL, + UPFPGA_UP_ADC0, + UPFPGA_UP_GPIO17, + UPFPGA_UP_GPIO27, + UPFPGA_UP_GPIO22, + UPFPGA_UP_SPI_MOSI, + UPFPGA_UP_SPI_MISO, + UPFPGA_UP_SPI_CLK, + UPFPGA_UP_I2C0_SDA, + UPFPGA_UP_GPIO5, + UPFPGA_UP_GPIO6, + UPFPGA_UP_PWM1, + UPFPGA_UP_I2S_FRM, + UPFPGA_UP_GPIO26, + UPFPGA_UP_UART1_TX, +}; + +enum upboard_up_reg2_fpgabit { + UPFPGA_UP_UART1_RX, + UPFPGA_UP_I2S_CLK, + UPFPGA_UP_GPIO23, + UPFPGA_UP_GPIO24, + UPFPGA_UP_GPIO25, + UPFPGA_UP_SPI_CS0, + UPFPGA_UP_SPI_CS1, + UPFPGA_UP_I2C0_SCL, + UPFPGA_UP_PWM0, + UPFPGA_UP_GPIO16, + UPFPGA_UP_I2S_DIN, + UPFPGA_UP_I2S_DOUT, +}; + +#define UPFPGA_UP_UART1_RTS UPFPGA_UP_GPIO17 +#define UPFPGA_UP_UART1_CTS UPFPGA_UP_GPIO16 + +static struct pinctrl_pin_desc upboard_up_pins[] = { + UPBOARD_UP_PIN_FUNC(0, I2C1_SDA, &upboard_i2c1_reg), + UPBOARD_UP_PIN_FUNC(0, I2C1_SCL, &upboard_i2c1_reg), + UPBOARD_UP_PIN_FUNC(0, ADC0, &upboard_adc0_reg), + UPBOARD_UP_PIN_NAME(0, UART1_RTS), + UPBOARD_UP_PIN_NAME(0, GPIO27), + UPBOARD_UP_PIN_NAME(0, GPIO22), + UPBOARD_UP_PIN_NAME(0, SPI_MOSI), + UPBOARD_UP_PIN_NAME(0, SPI_MISO), + UPBOARD_UP_PIN_NAME(0, SPI_CLK), + UPBOARD_UP_PIN_FUNC(0, I2C0_SDA, &upboard_i2c0_reg), + UPBOARD_UP_PIN_NAME(0, GPIO5), + UPBOARD_UP_PIN_NAME(0, GPIO6), + UPBOARD_UP_PIN_NAME(0, PWM1), + UPBOARD_UP_PIN_NAME(0, I2S_FRM), + UPBOARD_UP_PIN_NAME(0, GPIO26), + UPBOARD_UP_PIN_NAME(0, UART1_TX), + /* register 1 */ + UPBOARD_UP_PIN_NAME(1, UART1_RX), + UPBOARD_UP_PIN_NAME(1, I2S_CLK), + UPBOARD_UP_PIN_NAME(1, GPIO23), + UPBOARD_UP_PIN_NAME(1, GPIO24), + UPBOARD_UP_PIN_NAME(1, GPIO25), + UPBOARD_UP_PIN_NAME(1, SPI_CS0), + UPBOARD_UP_PIN_NAME(1, SPI_CS1), + UPBOARD_UP_PIN_FUNC(1, I2C0_SCL, &upboard_i2c0_reg), + UPBOARD_UP_PIN_NAME(1, PWM0), + UPBOARD_UP_PIN_NAME(1, UART1_CTS), + UPBOARD_UP_PIN_NAME(1, I2S_DIN), + UPBOARD_UP_PIN_NAME(1, I2S_DOUT), +}; + +static const unsigned int upboard_up_rpi_mapping[] = { + UPBOARD_UP_BIT_TO_PIN(0, I2C0_SDA), + UPBOARD_UP_BIT_TO_PIN(1, I2C0_SCL), + UPBOARD_UP_BIT_TO_PIN(0, I2C1_SDA), + UPBOARD_UP_BIT_TO_PIN(0, I2C1_SCL), + UPBOARD_UP_BIT_TO_PIN(0, ADC0), + UPBOARD_UP_BIT_TO_PIN(0, GPIO5), + UPBOARD_UP_BIT_TO_PIN(0, GPIO6), + UPBOARD_UP_BIT_TO_PIN(1, SPI_CS1), + UPBOARD_UP_BIT_TO_PIN(1, SPI_CS0), + UPBOARD_UP_BIT_TO_PIN(0, SPI_MISO), + UPBOARD_UP_BIT_TO_PIN(0, SPI_MOSI), + UPBOARD_UP_BIT_TO_PIN(0, SPI_CLK), + UPBOARD_UP_BIT_TO_PIN(1, PWM0), + UPBOARD_UP_BIT_TO_PIN(0, PWM1), + UPBOARD_UP_BIT_TO_PIN(0, UART1_TX), + UPBOARD_UP_BIT_TO_PIN(1, UART1_RX), + UPBOARD_UP_BIT_TO_PIN(1, GPIO16), + UPBOARD_UP_BIT_TO_PIN(0, GPIO17), + UPBOARD_UP_BIT_TO_PIN(1, I2S_CLK), + UPBOARD_UP_BIT_TO_PIN(0, I2S_FRM), + UPBOARD_UP_BIT_TO_PIN(1, I2S_DIN), + UPBOARD_UP_BIT_TO_PIN(1, I2S_DOUT), + UPBOARD_UP_BIT_TO_PIN(0, GPIO22), + UPBOARD_UP_BIT_TO_PIN(1, GPIO23), + UPBOARD_UP_BIT_TO_PIN(1, GPIO24), + UPBOARD_UP_BIT_TO_PIN(1, GPIO25), + UPBOARD_UP_BIT_TO_PIN(0, GPIO26), + UPBOARD_UP_BIT_TO_PIN(0, GPIO27), +}; + +static const unsigned int uart1_pins[] = { 14, 15, 16, 17 }; +static const unsigned int uart2_pins[] = { 25, 27 }; +static const unsigned int i2c0_pins[] = { 0, 1 }; +static const unsigned int i2c1_pins[] = { 2, 3 }; +static const unsigned int spi2_pins[] = { 8, 9, 10, 11 }; +static const unsigned int i2s0_pins[] = { 18, 19, 20, 21 }; +static const unsigned int pwm0_pins[] = { 12 }; +static const unsigned int pwm1_pins[] = { 13 }; +static const unsigned int adc0_pins[] = { 4 }; + +static const struct upboard_pingroup pin_groups[] = { + PIN_GROUP("uart1_grp", uart1_pins), + PIN_GROUP("uart2_grp", uart2_pins), + PIN_GROUP("i2c0_grp", i2c0_pins), + PIN_GROUP("i2c1_grp", i2c1_pins), + PIN_GROUP("spi2_grp", spi2_pins), + PIN_GROUP("i2s0_grp", i2s0_pins), + PIN_GROUP("pwm0_grp", pwm0_pins), + PIN_GROUP("pwm1_grp", pwm1_pins), + PIN_GROUP("adc0_grp", adc0_pins), +}; + +static const char * const uart1_groups[] = { "uart1_grp" }; +static const char * const uart2_groups[] = { "uart2_grp" }; +static const char * const i2c0_groups[] = { "i2c0_grp" }; +static const char * const i2c1_groups[] = { "i2c1_grp" }; +static const char * const spi2_groups[] = { "spi2_grp" }; +static const char * const i2s0_groups[] = { "i2s0_grp" }; +static const char * const pwm0_groups[] = { "pwm0_grp" }; +static const char * const pwm1_groups[] = { "pwm1_grp" }; +static const char * const adc0_groups[] = { "adc0_grp" }; + +static const struct upboard_function pin_functions[] = { + FUNCTION("uart1", uart1_groups), + FUNCTION("uart2", uart2_groups), + FUNCTION("i2c0", i2c0_groups), + FUNCTION("i2c1", i2c1_groups), + FUNCTION("spi2", spi2_groups), + FUNCTION("i2s0", i2s0_groups), + FUNCTION("pwm0", pwm0_groups), + FUNCTION("pwm1", pwm1_groups), + FUNCTION("adc0", adc0_groups), +}; + +/* + * UP^2 board data + */ + +#define UPBOARD_UP2_BIT_TO_PIN(r, id) (UPBOARD_BIT_TO_PIN(r, UPFPGA_UP2_##id)) + +#define UPBOARD_UP2_PIN_ANON(r, bit) \ + { \ + .number = UPBOARD_BIT_TO_PIN(r, bit), \ + .name = "NONAME", \ + } + +#define UPBOARD_UP2_PIN_NAME(r, id) \ + { \ + .number = UPBOARD_UP2_BIT_TO_PIN(r, id), \ + .name = #id, \ + } + +#define UPBOARD_UP2_PIN_FUNC(r, id, data) \ + { \ + .number = UPBOARD_UP2_BIT_TO_PIN(r, id), \ + .name = #id, \ + .drv_data = (void *)(data), \ + } + +enum upboard_up2_reg0_fpgabit { + UPFPGA_UP2_UART1_TXD, + UPFPGA_UP2_UART1_RXD, + UPFPGA_UP2_UART1_RTS, + UPFPGA_UP2_UART1_CTS, + UPFPGA_UP2_GPIO3, + UPFPGA_UP2_GPIO5, + UPFPGA_UP2_GPIO6, + UPFPGA_UP2_GPIO11, + UPFPGA_UP2_EXHAT_LVDS1n, + UPFPGA_UP2_EXHAT_LVDS1p, + UPFPGA_UP2_SPI2_TXD, + UPFPGA_UP2_SPI2_RXD, + UPFPGA_UP2_SPI2_FS1, + UPFPGA_UP2_SPI2_FS0, + UPFPGA_UP2_SPI2_CLK, + UPFPGA_UP2_SPI1_TXD, +}; + +enum upboard_up2_reg1_fpgabit { + UPFPGA_UP2_SPI1_RXD, + UPFPGA_UP2_SPI1_FS1, + UPFPGA_UP2_SPI1_FS0, + UPFPGA_UP2_SPI1_CLK, + UPFPGA_UP2_BIT20, + UPFPGA_UP2_BIT21, + UPFPGA_UP2_BIT22, + UPFPGA_UP2_BIT23, + UPFPGA_UP2_PWM1, + UPFPGA_UP2_PWM0, + UPFPGA_UP2_EXHAT_LVDS0n, + UPFPGA_UP2_EXHAT_LVDS0p, + UPFPGA_UP2_I2C0_SCL, + UPFPGA_UP2_I2C0_SDA, + UPFPGA_UP2_I2C1_SCL, + UPFPGA_UP2_I2C1_SDA, +}; + +enum upboard_up2_reg2_fpgabit { + UPFPGA_UP2_EXHAT_LVDS3n, + UPFPGA_UP2_EXHAT_LVDS3p, + UPFPGA_UP2_EXHAT_LVDS4n, + UPFPGA_UP2_EXHAT_LVDS4p, + UPFPGA_UP2_EXHAT_LVDS5n, + UPFPGA_UP2_EXHAT_LVDS5p, + UPFPGA_UP2_I2S_SDO, + UPFPGA_UP2_I2S_SDI, + UPFPGA_UP2_I2S_WS_SYNC, + UPFPGA_UP2_I2S_BCLK, + UPFPGA_UP2_EXHAT_LVDS6n, + UPFPGA_UP2_EXHAT_LVDS6p, + UPFPGA_UP2_EXHAT_LVDS7n, + UPFPGA_UP2_EXHAT_LVDS7p, + UPFPGA_UP2_EXHAT_LVDS2n, + UPFPGA_UP2_EXHAT_LVDS2p, +}; + +static struct pinctrl_pin_desc upboard_up2_pins[] = { + UPBOARD_UP2_PIN_NAME(0, UART1_TXD), + UPBOARD_UP2_PIN_NAME(0, UART1_RXD), + UPBOARD_UP2_PIN_NAME(0, UART1_RTS), + UPBOARD_UP2_PIN_NAME(0, UART1_CTS), + UPBOARD_UP2_PIN_NAME(0, GPIO3), + UPBOARD_UP2_PIN_NAME(0, GPIO5), + UPBOARD_UP2_PIN_NAME(0, GPIO6), + UPBOARD_UP2_PIN_NAME(0, GPIO11), + UPBOARD_UP2_PIN_NAME(0, EXHAT_LVDS1n), + UPBOARD_UP2_PIN_NAME(0, EXHAT_LVDS1p), + UPBOARD_UP2_PIN_NAME(0, SPI2_TXD), + UPBOARD_UP2_PIN_NAME(0, SPI2_RXD), + UPBOARD_UP2_PIN_NAME(0, SPI2_FS1), + UPBOARD_UP2_PIN_NAME(0, SPI2_FS0), + UPBOARD_UP2_PIN_NAME(0, SPI2_CLK), + UPBOARD_UP2_PIN_NAME(0, SPI1_TXD), + UPBOARD_UP2_PIN_NAME(1, SPI1_RXD), + UPBOARD_UP2_PIN_NAME(1, SPI1_FS1), + UPBOARD_UP2_PIN_NAME(1, SPI1_FS0), + UPBOARD_UP2_PIN_NAME(1, SPI1_CLK), + UPBOARD_UP2_PIN_ANON(1, 4), + UPBOARD_UP2_PIN_ANON(1, 5), + UPBOARD_UP2_PIN_ANON(1, 6), + UPBOARD_UP2_PIN_ANON(1, 7), + UPBOARD_UP2_PIN_NAME(1, PWM1), + UPBOARD_UP2_PIN_NAME(1, PWM0), + UPBOARD_UP2_PIN_NAME(1, EXHAT_LVDS0n), + UPBOARD_UP2_PIN_NAME(1, EXHAT_LVDS0p), + UPBOARD_UP2_PIN_FUNC(1, I2C0_SCL, &upboard_i2c0_reg), + UPBOARD_UP2_PIN_FUNC(1, I2C0_SDA, &upboard_i2c0_reg), + UPBOARD_UP2_PIN_FUNC(1, I2C1_SCL, &upboard_i2c1_reg), + UPBOARD_UP2_PIN_FUNC(1, I2C1_SDA, &upboard_i2c1_reg), + UPBOARD_UP2_PIN_NAME(2, EXHAT_LVDS3n), + UPBOARD_UP2_PIN_NAME(2, EXHAT_LVDS3p), + UPBOARD_UP2_PIN_NAME(2, EXHAT_LVDS4n), + UPBOARD_UP2_PIN_NAME(2, EXHAT_LVDS4p), + UPBOARD_UP2_PIN_NAME(2, EXHAT_LVDS5n), + UPBOARD_UP2_PIN_NAME(2, EXHAT_LVDS5p), + UPBOARD_UP2_PIN_NAME(2, I2S_SDO), + UPBOARD_UP2_PIN_NAME(2, I2S_SDI), + UPBOARD_UP2_PIN_NAME(2, I2S_WS_SYNC), + UPBOARD_UP2_PIN_NAME(2, I2S_BCLK), + UPBOARD_UP2_PIN_NAME(2, EXHAT_LVDS6n), + UPBOARD_UP2_PIN_NAME(2, EXHAT_LVDS6p), + UPBOARD_UP2_PIN_NAME(2, EXHAT_LVDS7n), + UPBOARD_UP2_PIN_NAME(2, EXHAT_LVDS7p), + UPBOARD_UP2_PIN_NAME(2, EXHAT_LVDS2n), + UPBOARD_UP2_PIN_NAME(2, EXHAT_LVDS2p), +}; + +static const unsigned int upboard_up2_rpi_mapping[] = { + UPBOARD_UP2_BIT_TO_PIN(1, I2C0_SDA), + UPBOARD_UP2_BIT_TO_PIN(1, I2C0_SCL), + UPBOARD_UP2_BIT_TO_PIN(1, I2C1_SDA), + UPBOARD_UP2_BIT_TO_PIN(1, I2C1_SCL), + UPBOARD_UP2_BIT_TO_PIN(0, GPIO3), + UPBOARD_UP2_BIT_TO_PIN(0, GPIO11), + UPBOARD_UP2_BIT_TO_PIN(0, SPI2_CLK), + UPBOARD_UP2_BIT_TO_PIN(1, SPI1_FS1), + UPBOARD_UP2_BIT_TO_PIN(1, SPI1_FS0), + UPBOARD_UP2_BIT_TO_PIN(1, SPI1_RXD), + UPBOARD_UP2_BIT_TO_PIN(0, SPI1_TXD), + UPBOARD_UP2_BIT_TO_PIN(1, SPI1_CLK), + UPBOARD_UP2_BIT_TO_PIN(1, PWM0), + UPBOARD_UP2_BIT_TO_PIN(1, PWM1), + UPBOARD_UP2_BIT_TO_PIN(0, UART1_TXD), + UPBOARD_UP2_BIT_TO_PIN(0, UART1_RXD), + UPBOARD_UP2_BIT_TO_PIN(0, UART1_CTS), + UPBOARD_UP2_BIT_TO_PIN(0, UART1_RTS), + UPBOARD_UP2_BIT_TO_PIN(2, I2S_BCLK), + UPBOARD_UP2_BIT_TO_PIN(2, I2S_WS_SYNC), + UPBOARD_UP2_BIT_TO_PIN(2, I2S_SDI), + UPBOARD_UP2_BIT_TO_PIN(2, I2S_SDO), + UPBOARD_UP2_BIT_TO_PIN(0, GPIO6), + UPBOARD_UP2_BIT_TO_PIN(0, SPI2_FS1), + UPBOARD_UP2_BIT_TO_PIN(0, SPI2_RXD), + UPBOARD_UP2_BIT_TO_PIN(0, SPI2_TXD), + UPBOARD_UP2_BIT_TO_PIN(0, SPI2_FS0), + UPBOARD_UP2_BIT_TO_PIN(0, GPIO5), +}; + +/* + * UP Core board + CREX carrier board data + */ + +#define UPBOARD_UPCORE_CREX_BIT_TO_PIN(r, id) \ + (UPBOARD_BIT_TO_PIN(r, UPFPGA_UPCORE_CREX_##id)) + +#define UPBOARD_UPCORE_CREX_PIN_ANON(r, bit) \ + { \ + .number = UPBOARD_BIT_TO_PIN(r, bit), \ + } + +#define UPBOARD_UPCORE_CREX_PIN_NAME(r, id) \ + { \ + .number = UPBOARD_UPCORE_CREX_BIT_TO_PIN(r, id), \ + .name = #id, \ + } + +#define UPBOARD_UPCORE_CREX_PIN_FUNC(r, id, data) \ + { \ + .number = UPBOARD_UPCORE_CREX_BIT_TO_PIN(r, id), \ + .name = #id, \ + .drv_data = (void *)(data), \ + } + +enum upboard_upcore_crex_reg1_fpgabit { + UPFPGA_UPCORE_CREX_I2C0_SDA, + UPFPGA_UPCORE_CREX_I2C0_SCL, + UPFPGA_UPCORE_CREX_I2C1_SDA, + UPFPGA_UPCORE_CREX_I2C1_SCL, + UPFPGA_UPCORE_CREX_SPI2_CS0, + UPFPGA_UPCORE_CREX_SPI2_CS1, + UPFPGA_UPCORE_CREX_SPI2_MOSI, + UPFPGA_UPCORE_CREX_SPI2_MISO, + UPFPGA_UPCORE_CREX_SPI2_CLK, + UPFPGA_UPCORE_CREX_UART1_TXD, + UPFPGA_UPCORE_CREX_UART1_RXD, + UPFPGA_UPCORE_CREX_PWM0, + UPFPGA_UPCORE_CREX_PWM1, + UPFPGA_UPCORE_CREX_I2S2_FRM, + UPFPGA_UPCORE_CREX_I2S2_CLK, + UPFPGA_UPCORE_CREX_I2S2_RX, +}; + +enum upboard_upcore_crex_reg2_fpgabit { + UPFPGA_UPCORE_CREX_I2S2_TX, + UPFPGA_UPCORE_CREX_GPIO0, + UPFPGA_UPCORE_CREX_GPIO2, + UPFPGA_UPCORE_CREX_GPIO3, + UPFPGA_UPCORE_CREX_GPIO4, + UPFPGA_UPCORE_CREX_GPIO9, +}; + +static struct pinctrl_pin_desc upboard_upcore_crex_pins[] = { + UPBOARD_UPCORE_CREX_PIN_FUNC(0, I2C0_SDA, &upboard_i2c0_reg), + UPBOARD_UPCORE_CREX_PIN_FUNC(0, I2C0_SCL, &upboard_i2c0_reg), + UPBOARD_UPCORE_CREX_PIN_FUNC(0, I2C1_SDA, &upboard_i2c1_reg), + UPBOARD_UPCORE_CREX_PIN_FUNC(0, I2C1_SCL, &upboard_i2c1_reg), + UPBOARD_UPCORE_CREX_PIN_NAME(0, SPI2_CS0), + UPBOARD_UPCORE_CREX_PIN_NAME(0, SPI2_CS1), + UPBOARD_UPCORE_CREX_PIN_NAME(0, SPI2_MOSI), + UPBOARD_UPCORE_CREX_PIN_NAME(0, SPI2_MISO), + UPBOARD_UPCORE_CREX_PIN_NAME(0, SPI2_CLK), + UPBOARD_UPCORE_CREX_PIN_NAME(0, UART1_TXD), + UPBOARD_UPCORE_CREX_PIN_NAME(0, UART1_RXD), + UPBOARD_UPCORE_CREX_PIN_NAME(0, PWM0), + UPBOARD_UPCORE_CREX_PIN_NAME(0, PWM1), + UPBOARD_UPCORE_CREX_PIN_NAME(0, I2S2_FRM), + UPBOARD_UPCORE_CREX_PIN_NAME(0, I2S2_CLK), + UPBOARD_UPCORE_CREX_PIN_NAME(0, I2S2_RX), + /* register 1 */ + UPBOARD_UPCORE_CREX_PIN_NAME(1, I2S2_TX), + UPBOARD_UPCORE_CREX_PIN_NAME(1, GPIO0), + UPBOARD_UPCORE_CREX_PIN_FUNC(1, GPIO2, &upboard_adc0_reg), + UPBOARD_UPCORE_CREX_PIN_NAME(1, GPIO3), + UPBOARD_UPCORE_CREX_PIN_NAME(1, GPIO4), + UPBOARD_UPCORE_CREX_PIN_NAME(1, GPIO9), +}; + +static unsigned int upboard_upcore_crex_rpi_mapping[] = { + UPBOARD_UPCORE_CREX_BIT_TO_PIN(0, I2C0_SDA), + UPBOARD_UPCORE_CREX_BIT_TO_PIN(0, I2C0_SCL), + UPBOARD_UPCORE_CREX_BIT_TO_PIN(0, I2C1_SDA), + UPBOARD_UPCORE_CREX_BIT_TO_PIN(0, I2C1_SCL), + UPBOARD_UPCORE_CREX_BIT_TO_PIN(1, GPIO0), + UPBOARD_UPCORE_CREX_BIT_TO_PIN(1, GPIO2), + UPBOARD_UPCORE_CREX_BIT_TO_PIN(1, GPIO3), + UPBOARD_UPCORE_CREX_BIT_TO_PIN(0, SPI2_CS1), + UPBOARD_UPCORE_CREX_BIT_TO_PIN(0, SPI2_CS0), + UPBOARD_UPCORE_CREX_BIT_TO_PIN(0, SPI2_MISO), + UPBOARD_UPCORE_CREX_BIT_TO_PIN(0, SPI2_MOSI), + UPBOARD_UPCORE_CREX_BIT_TO_PIN(0, SPI2_CLK), + UPBOARD_UPCORE_CREX_BIT_TO_PIN(0, PWM0), + UPBOARD_UPCORE_CREX_BIT_TO_PIN(0, PWM1), + UPBOARD_UPCORE_CREX_BIT_TO_PIN(0, UART1_TXD), + UPBOARD_UPCORE_CREX_BIT_TO_PIN(0, UART1_RXD), + UPBOARD_UPCORE_CREX_BIT_TO_PIN(1, GPIO9), + UPBOARD_UPCORE_CREX_BIT_TO_PIN(1, GPIO4), + UPBOARD_UPCORE_CREX_BIT_TO_PIN(0, I2S2_CLK), + UPBOARD_UPCORE_CREX_BIT_TO_PIN(0, I2S2_FRM), + UPBOARD_UPCORE_CREX_BIT_TO_PIN(0, I2S2_RX), + UPBOARD_UPCORE_CREX_BIT_TO_PIN(1, I2S2_TX), +}; + +/* + * UP Core board + CRST02 carrier board data + */ + +#define upboard_upcore_crst02_pins upboard_upcore_crex_pins +#define upboard_upcore_crst02_rpi_mapping upboard_upcore_crex_rpi_mapping + +static int upboard_set_mux(struct pinctrl_dev *pctldev, unsigned int function, + unsigned int group) +{ + return 0; +}; + +static int upboard_fpga_request_enable(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range, + unsigned int pin) +{ + const struct pin_desc * const pd = pin_desc_get(pctldev, pin); + const struct upboard_pin *p; + int ret; + + if (!pd) + return -EINVAL; + + p = pd->drv_data; + if (p->funcbit) { + ret = regmap_field_write(p->funcbit, 0); + if (ret) + return ret; + } + + if (p->enbit) { + ret = regmap_field_write(p->enbit, 1); + if (ret) + return ret; + } + + return 0; +}; + +static int upboard_fpga_request_free(struct pinctrl_dev *pctldev, + unsigned int pin) +{ + const struct pin_desc * const pd = pin_desc_get(pctldev, pin); + const struct upboard_pin *p; + int ret; + + if (!pd) + return -EINVAL; + + p = pd->drv_data; + if (p->funcbit) { + ret = regmap_field_write(p->funcbit, 1); + if (ret) + return ret; + } + + if (p->enbit) { + ret = regmap_field_write(p->enbit, 0); + if (ret) + return ret; + } + + return 0; +}; + +static int upboard_fpga_set_direction(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range, + unsigned int pin, bool input) +{ + const struct pin_desc * const pd = pin_desc_get(pctldev, pin); + const struct upboard_pin *p; + + if (!pd) + return -EINVAL; + + p = pd->drv_data; + upboard_fpga_request_enable(pctldev, range, pin); + + return regmap_field_write(p->dirbit, input); +}; + +static int upboard_get_functions_count(struct pinctrl_dev *pctldev) +{ + return 0; +} + +static const char *upboard_get_function_name(struct pinctrl_dev *pctldev, + unsigned int selector) +{ + return NULL; +} + +static int upboard_get_function_groups(struct pinctrl_dev *pctldev, + unsigned int selector, + const char * const **groups, + unsigned int *num_groups) +{ + *groups = NULL; + *num_groups = 0; + return 0; +} + +static const struct pinmux_ops upboard_pinmux_ops = { + .get_functions_count = upboard_get_functions_count, + .get_function_groups = upboard_get_function_groups, + .get_function_name = upboard_get_function_name, + .set_mux = upboard_set_mux, + .gpio_request_enable = upboard_fpga_request_enable, + .gpio_set_direction = upboard_fpga_set_direction, +}; + +static int upboard_get_groups_count(struct pinctrl_dev *pctldev) +{ + return 0; +} + +static const char *upboard_get_group_name(struct pinctrl_dev *pctldev, + unsigned int selector) +{ + return NULL; +} + +static const struct pinctrl_ops upboard_pinctrl_ops = { + .get_groups_count = upboard_get_groups_count, + .get_group_name = upboard_get_group_name, +}; + +static struct pinctrl_desc upboard_up_pinctrl_desc = { + .pins = upboard_up_pins, + .npins = ARRAY_SIZE(upboard_up_pins), + .pctlops = &upboard_pinctrl_ops, + .pmxops = &upboard_pinmux_ops, + .owner = THIS_MODULE, +}; + +static struct pinctrl_desc upboard_up2_pinctrl_desc = { + .pins = upboard_up2_pins, + .npins = ARRAY_SIZE(upboard_up2_pins), + .pctlops = &upboard_pinctrl_ops, + .pmxops = &upboard_pinmux_ops, + .owner = THIS_MODULE, +}; + +static struct pinctrl_desc upboard_upcore_crex_pinctrl_desc = { + .pins = upboard_upcore_crex_pins, + .npins = ARRAY_SIZE(upboard_upcore_crex_pins), + .pctlops = &upboard_pinctrl_ops, + .pmxops = &upboard_pinmux_ops, + .owner = THIS_MODULE, +}; + +static struct pinctrl_desc upboard_upcore_crst02_pinctrl_desc = { + .pins = upboard_upcore_crst02_pins, + .npins = ARRAY_SIZE(upboard_upcore_crst02_pins), + .pctlops = &upboard_pinctrl_ops, + .pmxops = &upboard_pinmux_ops, + .owner = THIS_MODULE, +}; + +static void upboard_alt_func_enable(struct gpio_chip *gc, const char *name) +{ + struct upboard_pinctrl *pctrl = container_of(gc, struct upboard_pinctrl, chip); + int offset[gc->ngpio]; + int i, j, cnt; + bool input = false; + + /* find all pins */ + for (i = 0, cnt = 0; i < pctrl->pctldesc->npins; i++) { + if (strstr(pctrl->pctldesc->pins[i].name, name)) + offset[cnt++] = i; + } + for (i = 0; i < cnt; i++) { + if (pinctrl_gpio_request(pctrl->pins[offset[i]].gpio) == -EBUSY) + return; /* this pin is being used */ + pinctrl_gpio_free(pctrl->pins[offset[i]].gpio); + } + /* change to alternate function */ + for (i = 0; i < cnt; i++) { + if (pctrl->pins[offset[i]].regs == NULL) + continue; + + if (strstr(pctrl->pctldesc->pins[offset[i]].name, "I2C")) { + int mode = 1; + unsigned int val; + + switch (pctrl->ident) { + case 15: + mode = 2; + break; + } + + val = readl(pctrl->pins[offset[i]].regs) | + mode<<PADCFG0_PMODE_SHIFT; + writel(val, pctrl->pins[offset[i]].regs); + upboard_fpga_request_free(pctrl->pctldev, offset[i]); + continue; + } else if (strstr(pctrl->pctldesc->pins[offset[i]].name, + "UART")) { + int mode = 1; + unsigned int val; + + switch (pctrl->ident) { + case 13: + case 14: + mode = 4; + break; + case 15: + mode = 2; + break; + } + + val = readl(pctrl->pins[offset[i]].regs) | + mode<<PADCFG0_PMODE_SHIFT; + writel(val, pctrl->pins[offset[i]].regs); + } else if (strstr(pctrl->pctldesc->pins[offset[i]].name, + "SPI")) { + int mode = 1; + unsigned int val; + + switch (pctrl->ident) { + case 15: + mode = 7; + break; + } + + val = readl(pctrl->pins[offset[i]].regs) | + mode<<PADCFG0_PMODE_SHIFT; + writel(val, pctrl->pins[offset[i]].regs); + } else if (strstr(pctrl->pctldesc->pins[offset[i]].name, + "I2S")) { + int mode = 1; + unsigned int val; + + switch (pctrl->ident) { + case 15: + mode = 4; + break; + } + + val = readl(pctrl->pins[offset[i]].regs) | + mode<<PADCFG0_PMODE_SHIFT; + writel(val, pctrl->pins[offset[i]].regs); + } else { + unsigned int val; + + val = readl(pctrl->pins[offset[i]].regs) | + 1<<PADCFG0_PMODE_SHIFT; + writel(val, pctrl->pins[offset[i]].regs); + } + + /* input pins */ + if (strstr(pctrl->pctldesc->pins[offset[i]].name, "RX")) + input = true; + if (strstr(pctrl->pctldesc->pins[offset[i]].name, "CTS")) + input = true; + if (strstr(pctrl->pctldesc->pins[offset[i]].name, "ADC")) + input = true; + if (strstr(pctrl->pctldesc->pins[offset[i]].name, "MISO")) + input = true; + if (strstr(pctrl->pctldesc->pins[offset[i]].name, "DIN")) + input = true; + upboard_fpga_set_direction(pctrl->pctldev, NULL, offset[i], + input); + } +} + +static int upboard_rpi_to_native_gpio(struct gpio_chip *gc, unsigned int gpio) +{ + struct upboard_pinctrl *pctrl = container_of(gc, struct upboard_pinctrl, chip); + unsigned int pin = pctrl->rpi_mapping[gpio]; + struct pinctrl_gpio_range *range; + + range = pinctrl_find_gpio_range_from_pin(pctrl->pctldev, pin); + if (!range) + return -ENODEV; + + return range->base; +} + +static int upboard_gpio_request(struct gpio_chip *gc, unsigned int offset) +{ + struct upboard_pinctrl *pctrl = container_of(gc, struct upboard_pinctrl, chip); + int gpio = upboard_rpi_to_native_gpio(gc, offset); + + if (gpio < 0) + return gpio; + + return pinctrl_gpio_request(gpio); +} + +static void upboard_gpio_free(struct gpio_chip *gc, unsigned int offset) +{ + struct upboard_pinctrl *pctrl = container_of(gc, struct upboard_pinctrl, chip); + int gpio = upboard_rpi_to_native_gpio(gc, offset); + unsigned int pin = pctrl->rpi_mapping[offset]; + char name[strlen(pctrl->pctldesc->pins[pin].name)]; + char *p; + + if (gpio < 0) + return; + + pinctrl_gpio_free(gpio); + + strcpy(name, pctrl->pctldesc->pins[pin].name); + p = name; + upboard_alt_func_enable(gc, strsep(&p, "_")); +} + +static int upboard_gpio_get(struct gpio_chip *gc, unsigned int offset) +{ + int gpio = upboard_rpi_to_native_gpio(gc, offset); + + if (gpio < 0) + return gpio; + + return gpiod_get_value(gpio_to_desc(gpio)); +} + +static void upboard_gpio_set(struct gpio_chip *gc, unsigned int offset, + int value) +{ + struct upboard_pinctrl *pctrl = container_of(gc, struct upboard_pinctrl, chip); + unsigned int pin = pctrl->rpi_mapping[offset]; + int gpio = upboard_rpi_to_native_gpio(gc, offset); + + if (gpio < 0) + return; + + gpiod_set_value(gpio_to_desc(gpio), value); + + /* APL03 open drain GPIO */ + if (pctrl->ident == 9) { + if (pin == 0 || pin == 1) { + int val = readl(pctrl->pins[pin].regs); + + if (value) + val |= PADCFG0_GPIOTXDIS; + else + val &= ~PADCFG0_GPIOTXDIS; + writel(val, pctrl->pins[pin].regs); + } + } +} + +static int upboard_gpio_direction_input(struct gpio_chip *gc, + unsigned int offset) +{ + int gpio = upboard_rpi_to_native_gpio(gc, offset); + struct upboard_pinctrl *pctrl = container_of(gc, struct upboard_pinctrl, chip); + unsigned int pin = pctrl->rpi_mapping[offset]; + struct pinctrl_gpio_range *range; + + range = pinctrl_find_gpio_range_from_pin(pctrl->pctldev, pin); + upboard_fpga_set_direction(pctrl->pctldev, range, pin, true); + + if (gpio < 0) + return gpio; + + return gpiod_direction_input(gpio_to_desc(gpio)); +} + +static int upboard_gpio_direction_output(struct gpio_chip *gc, + unsigned int offset, int value) +{ + int gpio = upboard_rpi_to_native_gpio(gc, offset); + struct upboard_pinctrl *pctrl = container_of(gc, struct upboard_pinctrl, chip); + unsigned int pin = pctrl->rpi_mapping[offset]; + struct pinctrl_gpio_range *range; + + range = pinctrl_find_gpio_range_from_pin(pctrl->pctldev, pin); + upboard_fpga_set_direction(pctrl->pctldev, range, pin, false); + + if (gpio < 0) + return gpio; + + return gpiod_direction_output(gpio_to_desc(gpio), value); +} + +static struct gpio_chip upboard_gpio_chip = { + .label = "Raspberry Pi compatible UP GPIO", + .base = 0, + .request = upboard_gpio_request, + .free = upboard_gpio_free, + .get = upboard_gpio_get, + .set = upboard_gpio_set, + .direction_input = upboard_gpio_direction_input, + .direction_output = upboard_gpio_direction_output, + .owner = THIS_MODULE, +}; + +/* DMI Matches for older bios without fpga initialization */ +static const struct dmi_system_id upboard_dmi_table[] __initconst = { + { + .matches = { /* UP */ + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "AAEON"), + DMI_EXACT_MATCH(DMI_BOARD_NAME, "UP-CHT01"), + DMI_EXACT_MATCH(DMI_BOARD_VERSION, "V0.4"), + }, + }, + { + .matches = { /* UP2 */ + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "AAEON"), + DMI_EXACT_MATCH(DMI_BOARD_NAME, "UP-APL01"), + DMI_EXACT_MATCH(DMI_BOARD_VERSION, "V0.3"), + }, + }, + { + .ident = 9, + .matches = { /* UP2 */ + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "AAEON"), + DMI_EXACT_MATCH(DMI_BOARD_NAME, "UP-APL03"), + }, + }, + { + .ident = 13, + .matches = { /* UP 6000 */ + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "AAEON"), + DMI_EXACT_MATCH(DMI_BOARD_NAME, "UPN-EHL01"), + }, + }, + { + .ident = 14, + .matches = { /* UP squared v2 */ + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "AAEON"), + DMI_EXACT_MATCH(DMI_BOARD_NAME, "UPS-EHL01"), + }, + }, + { + .ident = 15, + .matches = { /* UP Xtreme i12 */ + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "AAEON"), + DMI_EXACT_MATCH(DMI_BOARD_NAME, "UPX-ADLP01"), + }, + }, + { } /* Terminating entry */ +}; + +bool regmap_check_writeable(struct upboard_fpga *fpga, unsigned int reg) +{ + if (!fpga) + return -ENOMEM; + + if (fpga->regmapconf->max_register && + reg > fpga->regmapconf->max_register) + return false; + + if (fpga->regmapconf->writeable_reg) + return fpga->regmapconf->writeable_reg(fpga->dev, reg); + + if (fpga->regmapconf->wr_table) + return regmap_check_range_table(fpga->regmap, reg, + fpga->regmapconf->wr_table); + + return true; +} + +static void __iomem *upboard_get_regs(struct gpio_chip *gc, unsigned int pin, + unsigned int reg) +{ + struct platform_device *pdev = to_platform_device(gc->parent); + struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + size_t nregs; + void __iomem *base; + u32 offset, value; + + /* UP ADL/TGL */ + if (strstr(dev_name(&pdev->dev), "INTC1055:00") || + strstr(dev_name(&pdev->dev), "INT34C5:00")) { + struct intel_pinctrl *intel_pctrl = gpiochip_get_data(gc); + struct pinctrl_dev *pctldev; + struct pinctrl_gpio_range *range; + + pctldev = intel_pctrl->pctldev; + if (pctldev == NULL) + return NULL; + + range = pinctrl_find_gpio_range_from_pin(pctldev, pin); + if (range) + pin = pin - range->pin_base; + else + return NULL; + + if (range->pin_base < 67) + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + else if (range->pin_base < 171) + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + else if (range->pin_base < 260) + res = platform_get_resource(pdev, IORESOURCE_MEM, 2); + else + res = platform_get_resource(pdev, IORESOURCE_MEM, 3); + } + + if (IS_ERR(res)) { + dev_err(gc->parent, "upboard resource get failed"); + return NULL; + } + + base = devm_ioremap(&pdev->dev, res->start, resource_size(res)); + offset = readl(base + PADBAR); + value = readl(base + REVID); + + if (((value & REVID_MASK) >> REVID_SHIFT) >= 0x94) + nregs = 4; + else + nregs = 2; + + return base + offset + reg + pin * nregs * 4; +} + +int upboard_acpi_node_pin_mapping(struct upboard_fpga *fpga, + struct upboard_pinctrl *pctrl, + const char *propname, + const char *pinctl_name, + unsigned int pin_offset) +{ + struct gpio_descs *descs; + int ret, i; + + descs = devm_gpiod_get_array(fpga->dev, propname, GPIOD_ASIS); + if (IS_ERR(descs)) { + ret = PTR_ERR(descs); + if (ret != -EPROBE_DEFER) + dev_err(fpga->dev, "Failed to get %s gpios", propname); + return ret; + } + + for (i = 0; i < descs->ndescs; i++) { + struct gpio_desc *desc = descs->desc[i]; + struct gpio_chip *gc = gpiod_to_chip(desc); + + pctrl->pins[i].gpio = desc_to_gpio(desc); + pctrl->pins[i].base = gc->base; + pctrl->pins[i].irq = gpiod_to_irq(desc); + pctrl->pins[i].regs = + upboard_get_regs(gc, + desc_to_gpio(desc) - gc->base, + PADCFG0); + + /* The GPIOs may not be contiguous, so add them 1-by-1 */ + ret = gpiochip_add_pin_range(gpiod_to_chip(desc), pinctl_name, + desc_to_gpio(desc) - gc->base, + pin_offset + i, 1); + if (ret) + return ret; + } + + /* dispose acpi resource */ + devm_gpiod_put_array(fpga->dev, descs); + + return ret; +} + +static void upboard_irq_ack(struct irq_data *d) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + + dev_info(NULL, "upboard_irq_ack"); +} + +static void upboard_irq_mask(struct irq_data *d) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + + dev_info(NULL, "upboard_irq_mask"); +} + +static void upboard_irq_unmask(struct irq_data *d) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + + dev_info(NULL, "upboard_irq_unmask"); +} + +static int upboard_irq_type(struct irq_data *d, unsigned int type) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + + dev_info(NULL, "upboard_irq_type"); + + return 0; +} + +static irqreturn_t upboard_gpio_irq_handler(int irq, void *data) +{ + generic_handle_irq(irq); + return IRQ_HANDLED; +} + +static int upboard_irq_chip_set_type(struct irq_data *data, unsigned int type) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(data); + struct upboard_pinctrl *pctrl = container_of(gc, struct upboard_pinctrl, chip); + unsigned int offset = irqd_to_hwirq(data); + + data->parent_data = irq_get_irq_data(pctrl->pins[offset].irq); + if (data->parent_data) { + dev_info(NULL, "%s: no NULL", __func__); + return irq_chip_set_type_parent(data, type); + } + + dev_info(NULL, "%s: NULL", __func__); + return 0; +} + +static struct irq_chip upboard_gpio_irqchip = { + .name = "upboard-gpio-irq", + .irq_ack = upboard_irq_ack, + .irq_mask = upboard_irq_mask, + .irq_unmask = upboard_irq_unmask, + .irq_set_type = upboard_irq_chip_set_type, + .flags = IRQCHIP_MASK_ON_SUSPEND | IRQCHIP_SKIP_SET_WAKE, +}; + +static int __init upboard_pinctrl_probe(struct platform_device *pdev) +{ + struct upboard_fpga * const fpga = dev_get_drvdata(pdev->dev.parent); + struct acpi_device * const adev = ACPI_COMPANION(&pdev->dev); + struct pinctrl_desc *pctldesc; + struct upboard_pinctrl *pctrl; + struct upboard_pin *pins; + const struct dmi_system_id *system_id; + const char *hid; + const unsigned int *rpi_mapping; + unsigned int ngpio; + int ret; + int i; + + if (!fpga) + return -EINVAL; + + if (!adev) + return -ENODEV; + + hid = acpi_device_hid(adev); + if (!strcmp(hid, "AANT0F00") || !strcmp(hid, "AANT0F04") || + !strcmp(hid, "AANT0000")) { + pctldesc = &upboard_up_pinctrl_desc; + rpi_mapping = upboard_up_rpi_mapping; + ngpio = ARRAY_SIZE(upboard_up_rpi_mapping); + } else if (!strcmp(hid, "AANT0F01")) { + pctldesc = &upboard_up2_pinctrl_desc; + rpi_mapping = upboard_up2_rpi_mapping; + ngpio = ARRAY_SIZE(upboard_up2_rpi_mapping); + } else if (!strcmp(hid, "AANT0F02")) { + pctldesc = &upboard_upcore_crex_pinctrl_desc; + rpi_mapping = upboard_upcore_crex_rpi_mapping; + ngpio = ARRAY_SIZE(upboard_upcore_crex_rpi_mapping); + } else if (!strcmp(hid, "AANT0F03")) { + pctldesc = &upboard_upcore_crst02_pinctrl_desc; + rpi_mapping = upboard_upcore_crst02_rpi_mapping; + ngpio = ARRAY_SIZE(upboard_upcore_crst02_rpi_mapping); + } else + return -ENODEV; + + pctldesc->name = dev_name(&pdev->dev); + + pins = devm_kzalloc(&pdev->dev, + sizeof(*pins) * pctldesc->npins, + GFP_KERNEL); + if (!pins) + return -ENOMEM; + + /* initialise pins */ + for (i = 0; i < pctldesc->npins; i++) { + struct upboard_pin *pin = &pins[i]; + struct pinctrl_pin_desc *pd = + (struct pinctrl_pin_desc *) &pctldesc->pins[i]; + struct reg_field fldconf = {0}; + unsigned int regoff = (pd->number / UPFPGA_REGISTER_SIZE); + unsigned int lsb = pd->number % UPFPGA_REGISTER_SIZE; + + pin->funcbit = NULL; + + if (pd->drv_data) { + fldconf = *(struct reg_field *)pd->drv_data; + if (!regmap_check_writeable(fpga, fldconf.reg)) + return -EINVAL; + + pin->funcbit = devm_regmap_field_alloc(&pdev->dev, + fpga->regmap, + fldconf); + if (IS_ERR(pin->funcbit)) + return PTR_ERR(pin->funcbit); + } + + pin->enbit = NULL; + fldconf.reg = UPFPGA_REG_GPIO_EN0 + regoff; + fldconf.lsb = lsb; + fldconf.msb = lsb; + + /* some platform don't have enable bit, ignore if not present */ + if (regmap_check_writeable(fpga, fldconf.reg)) { + pin->enbit = devm_regmap_field_alloc(&pdev->dev, + fpga->regmap, + fldconf); + if (IS_ERR(pin->enbit)) + return PTR_ERR(pin->enbit); + } + + fldconf.reg = UPFPGA_REG_GPIO_DIR0 + regoff; + fldconf.lsb = lsb; + fldconf.msb = lsb; + + if (!regmap_check_writeable(fpga, fldconf.reg)) + return -EINVAL; + + pin->dirbit = devm_regmap_field_alloc(&pdev->dev, + fpga->regmap, + fldconf); + if (IS_ERR(pin->dirbit)) + return PTR_ERR(pin->dirbit); + + pd->drv_data = pin; + } + + /* create a new pinctrl device and register it */ + pctrl = devm_kzalloc(&pdev->dev, sizeof(*pctrl), GFP_KERNEL); + if (!pctrl) + return -ENOMEM; + + pctrl->regmap = fpga->regmap; + pctrl->rpi_mapping = rpi_mapping; + pctrl->chip = upboard_gpio_chip; + pctrl->pctldesc = pctldesc; + pctrl->chip.parent = &pdev->dev; + pctrl->chip.ngpio = ngpio; + pctrl->pins = pins; + pctrl->chip.irq.chip = &upboard_gpio_irqchip; + + ret = devm_gpiochip_add_data(&pdev->dev, &pctrl->chip, pctrl); + if (ret) + return ret; + + pctrl->pctldev = devm_pinctrl_register(&pdev->dev, pctldesc, pctrl); + if (IS_ERR(pctrl->pctldev)) + return PTR_ERR(pctrl->pctldev); + + /* add acpi pin mapping according to external-gpios key */ + ret = upboard_acpi_node_pin_mapping(fpga, pctrl, + "external", + dev_name(&pdev->dev), + 0); + if (ret) + return ret; + + upboard_alt_func_enable(&pctrl->chip, "I2C"); + upboard_alt_func_enable(&pctrl->chip, "SPI"); + upboard_alt_func_enable(&pctrl->chip, "UART"); + upboard_alt_func_enable(&pctrl->chip, "I2S"); + upboard_alt_func_enable(&pctrl->chip, "PWM"); + upboard_alt_func_enable(&pctrl->chip, "ADC"); + upboard_alt_func_enable(&pctrl->chip, "NONAME"); /* for UP2 I2C pins */ + + return ret; +} + +static struct platform_driver upboard_pinctrl_driver = { + .driver = { + .name = "upboard-pinctrl", + }, +}; +module_platform_driver_probe(upboard_pinctrl_driver, upboard_pinctrl_probe); + +MODULE_AUTHOR("Gary Wang <garywang@xxxxxxxxxxxx>"); +MODULE_AUTHOR("Javier Arteaga <javier@xxxxxxxxxx>"); +MODULE_AUTHOR("Dan O'Donovan <dan@xxxxxxxxxx>"); +MODULE_AUTHOR("Nicola Lunghi <nicolal@xxxxxxxxxx>"); +MODULE_DESCRIPTION("UP Board HAT pin controller driver"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:upboard-pinctrl"); -- 2.17.1
