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mx.microsoft.com 1; spf=pass smtp.mailfrom=yunjingtech.com; dmarc=pass action=none header.from=yunjingtech.com; dkim=pass header.d=yunjingtech.com; arc=none Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=yunjingtech.com; Received: from SG2PR06MB3742.apcprd06.prod.outlook.com (2603:1096:4:d8::14) by KL1PR0601MB3876.apcprd06.prod.outlook.com (2603:1096:820:2d::10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6363.21; Thu, 11 May 2023 09:49:59 +0000 Received: from SG2PR06MB3742.apcprd06.prod.outlook.com ([fe80::e5e4:d643:2a1b:fea0]) by SG2PR06MB3742.apcprd06.prod.outlook.com ([fe80::e5e4:d643:2a1b:fea0%3]) with mapi id 15.20.6363.033; Thu, 11 May 2023 09:49:59 +0000 From: "larry.lai" To: lee@kernel.org, andriy.shevchenko@linux.intel.com, linus.walleij@linaro.org, pavel@ucw.cz Cc: linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-leds@vger.kernel.org, GaryWang@aaeon.com.tw, musa.lin@yunjingtech.com, jack.chang@yunjingtech.com, noah.hung@yunjingtech.com, michael.wang@yunjingtech.com, "larry.lai" Subject: [PATCH V4 1/3] mfd: Add support for UP board CPLD/FPGA Date: Thu, 11 May 2023 17:49:32 +0800 Message-Id: <20230511094934.4941-2-larry.lai@yunjingtech.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230511094934.4941-1-larry.lai@yunjingtech.com> References: <20230511094934.4941-1-larry.lai@yunjingtech.com> X-ClientProxiedBy: SGXP274CA0015.SGPP274.PROD.OUTLOOK.COM (2603:1096:4:b8::27) To SG2PR06MB3742.apcprd06.prod.outlook.com (2603:1096:4:d8::14) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SG2PR06MB3742:EE_|KL1PR0601MB3876:EE_ X-MS-Office365-Filtering-Correlation-Id: e88dec1a-f665-4ae6-52b8-08db5205158b X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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This mfd driver implements the line protocol to read and write registers from the FPGA through regmap. The register address map is also included. The UP Boards provide a few I/O pin headers (for both GPIO and functions), including a 40-pin Raspberry Pi compatible header. This patch implements support for the FPGA-based pin controller that manages direction and enable state for those header pins. Partial support UP boards: * UP core + CREX * UP core + CRST02 Reported-by: kernel test robot Signed-off-by: larry.lai --- RFC 2023/04/25 -> PATCH V4 (1) Fixed kernel test robot compiler warning. (2) Remove mistakes with wrong Reviewed-by tags. RFC 2022/11/23 -> RFC 2023/04/25 (1) Refer 2022/12/08 Andy Shevchenko review, cleaned up coding style and addressed review comments. PATCH V3 -> RFC 2022/11/23: (1) Refer 2022/11/16 Lee Jones review, cleaned up coding style and addressed review comments. (2) Description on the UP Boards FPGA register read/write protocols PATCH V2 -> V3: (1) fixed kernel test robot compiler warning. PATCH V1 -> V2: (1) Synchronizing upboard github to rc2 (2) Refer 2022/10/31 Lee Jones review, fixed some of the issues. --- drivers/mfd/Kconfig | 12 + drivers/mfd/Makefile | 1 + drivers/mfd/upboard-fpga.c | 526 +++++++++++++++++++++++++++++++ include/linux/mfd/upboard-fpga.h | 61 ++++ 4 files changed, 600 insertions(+) create mode 100644 drivers/mfd/upboard-fpga.c create mode 100644 include/linux/mfd/upboard-fpga.h diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index abb58ab1a1a4..1041e937fc7a 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -2104,6 +2104,18 @@ config MFD_QCOM_PM8008 under it in the device tree. Additional drivers must be enabled in order to use the functionality of the device. +config MFD_INTEL_UPBOARD_FPGA + tristate "Support for the Intel platform foundation kit UP board FPGA" + select MFD_CORE + depends on X86 && ACPI + help + Select this option to enable the Intel AAEON UP and UP^2 on-board FPGA. + This is core driver for the UP board that implements certain (pin + control, onboard LEDs or CEC) through an on-board FPGA. + + To compile this driver as a module, choose M here: the module will be + called upboard-fpga. + menu "Multimedia Capabilities Port drivers" depends on ARCH_SA1100 diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 858cacf659d6..8374a05f6f43 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -250,6 +250,7 @@ obj-$(CONFIG_MFD_ALTERA_A10SR) += altera-a10sr.o obj-$(CONFIG_MFD_ALTERA_SYSMGR) += altera-sysmgr.o obj-$(CONFIG_MFD_STPMIC1) += stpmic1.o obj-$(CONFIG_MFD_SUN4I_GPADC) += sun4i-gpadc.o +obj-$(CONFIG_MFD_INTEL_UPBOARD_FPGA) += upboard-fpga.o obj-$(CONFIG_MFD_STM32_LPTIMER) += stm32-lptimer.o obj-$(CONFIG_MFD_STM32_TIMERS) += stm32-timers.o diff --git a/drivers/mfd/upboard-fpga.c b/drivers/mfd/upboard-fpga.c new file mode 100644 index 000000000000..a9a231e6d431 --- /dev/null +++ b/drivers/mfd/upboard-fpga.c @@ -0,0 +1,526 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * UP Board multi function device driver for control CPLD/FPGA to + * provide more GPIO driving power also provide CPLD LEDs and pin mux function + * recognize HID AANT0F00 ~ AAANT0F04 in ACPI name space + * + * Copyright (c) AAEON. All rights reserved. + * + * Author: Gary Wang + * + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct upboard_fpga_data { + const struct regmap_config *cpld_config; + const struct mfd_cell *cells; + size_t ncells; +}; + +#define AAEON_MANUFACTURER_ID 0x01 +#define SUPPORTED_FW_MAJOR 0x0 +#define MENUFACTURER_ID_MASK GENMASK(7, 0) + +#define FIRMWARE_ID_BUILD_OFFSET (12) +#define FIRMWARE_ID_MAJOR_OFFSET (8) +#define FIRMWARE_ID_MINOR_OFFSET (4) +#define FIRMWARE_ID_PATCH_OFFSET (0) +#define FIRMWARE_ID_MASK GENMASK(3, 0) + +/* + * For UP Board Series FPGA register read/write protocols + * EMUTEX specs: + * D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 .... D22 D23 + * [RW][ address ][ DATA ] + * + * Read Sequence: + * ___ ____________________________________________________ _________ + * clr: \_/ <--low-pulse does start the write-readback \_/<--start + * sequence with partital reset of internal new sequence + * registers but the CONF-REG. + * ____________________________________________________________________ + * rst: _/ _ _ _ _ _ _ __ __ __ _ + * stb: STB#1->_/1\_/2\_/3\_...._/7\_/8\_/9\_/10\_..../23\_/24\_/<-STB#25 edge + * is needed + * to ACK + * (D0 - D7 stb rising latch) + * data_in: D0 D1 D2 .... D6 D7 don't ........ care(DC) + * data_out: don't ...........care(DC) D8 D9 .... D22 D23 + * (D8 - D23 stb falling latch) + * flag_Read: _________...._________ + * __DC_ ____________...._________/ \_ + * counter: + * [00]DC[00][01][02] ............[08][9][10]............[24][00] + * CONF-REG: + * [00] [ CONF-REG ] + * wreg: + * [00]DC[00][ wreg=SHFT(wreg) ][ADR][DATA][wreg=SHFT(wreg)] + * wreg2: + * [ (COPY)=ADDR ] + */ +static int upboard_fpga_read(void *context, unsigned int reg, unsigned int *val) +{ + struct upboard_fpga * const fpga = context; + int i; + + gpiod_set_value(fpga->clear_gpio, 0); + gpiod_set_value(fpga->clear_gpio, 1); + + reg |= UPFPGA_READ_FLAG; + + for (i = UPFPGA_ADDRESS_SIZE; i >= 0; i--) { + gpiod_set_value(fpga->strobe_gpio, 0); + gpiod_set_value(fpga->datain_gpio, !!(reg & BIT(i))); + gpiod_set_value(fpga->strobe_gpio, 1); + } + + gpiod_set_value(fpga->strobe_gpio, 0); + *val = 0; + + for (i = UPFPGA_REGISTER_SIZE - 1; i >= 0; i--) { + gpiod_set_value(fpga->strobe_gpio, 1); + gpiod_set_value(fpga->strobe_gpio, 0); + *val |= gpiod_get_value(fpga->dataout_gpio) << i; + } + + gpiod_set_value(fpga->strobe_gpio, 1); + + return 0; +} + +/* + * Write Sequence: + * ___ ____________________________________________________ _________ + * clr: \_/ <--low-pulse does start the write-readback \_/<--start + * sequence with partital reset of internal new sequence + * registers but the CONF-REG. + * ____________________________________________________________________ + * rst: _/ _ _ _ _ _ _ __ __ __ _ + * stb: STB#1->_/1\_/2\_/3\_...._/7\_/8\_/9\_/10\_..../23\_/24\_/<-STB#25 edge + * is needed + * to ACK + * (D0 - D23 stb rising latch) + * data_in: D0 D1 D2 .... D6 D7 D8 D9 .... D22 D23 + * data_out: don't ................................care (DC) + * flag_Read: + * __DC_ ____________....__________________________________ + * counter: + * [00]DC[00][01][02] ............[08][9][10]............[24][00] + * wreg: + * [00]DC[00][wreg=SHFT(wreg)&dat_in ][SHFT(wreg)&dat_in][DAT] + * wreg2: + * [ (COPY)=ADDR ] + * CONF-REG: + * [00] [ CONF-REG = OLD VALUE ][CONF-REG=DAT] + */ +static int upboard_fpga_write(void *context, unsigned int reg, unsigned int val) +{ + struct upboard_fpga * const fpga = context; + int i; + + gpiod_set_value(fpga->clear_gpio, 0); + gpiod_set_value(fpga->clear_gpio, 1); + + for (i = UPFPGA_ADDRESS_SIZE; i >= 0; i--) { + gpiod_set_value(fpga->strobe_gpio, 0); + gpiod_set_value(fpga->datain_gpio, !!(reg & BIT(i))); + gpiod_set_value(fpga->strobe_gpio, 1); + } + + gpiod_set_value(fpga->strobe_gpio, 0); + + for (i = UPFPGA_REGISTER_SIZE - 1; i >= 0; i--) { + gpiod_set_value(fpga->datain_gpio, !!(val & BIT(i))); + gpiod_set_value(fpga->strobe_gpio, 1); + gpiod_set_value(fpga->strobe_gpio, 0); + } + + gpiod_set_value(fpga->strobe_gpio, 1); + + return 0; +} + +static const struct regmap_range upboard_up_readable_ranges[] = { + regmap_reg_range(UPFPGA_REG_PLATFORM_ID, UPFPGA_REG_FIRMWARE_ID), + regmap_reg_range(UPFPGA_REG_FUNC_EN0, UPFPGA_REG_FUNC_EN0), + regmap_reg_range(UPFPGA_REG_GPIO_DIR0, UPFPGA_REG_GPIO_DIR1), +}; + +static const struct regmap_range upboard_up_writable_ranges[] = { + regmap_reg_range(UPFPGA_REG_FUNC_EN0, UPFPGA_REG_FUNC_EN0), + regmap_reg_range(UPFPGA_REG_GPIO_DIR0, UPFPGA_REG_GPIO_DIR1), +}; + +static const struct regmap_access_table upboard_up_readable_table = { + .yes_ranges = upboard_up_readable_ranges, + .n_yes_ranges = ARRAY_SIZE(upboard_up_readable_ranges), +}; + +static const struct regmap_access_table upboard_up_writable_table = { + .yes_ranges = upboard_up_writable_ranges, + .n_yes_ranges = ARRAY_SIZE(upboard_up_writable_ranges), +}; + +static const struct regmap_config upboard_up_regmap_config = { + .reg_bits = UPFPGA_ADDRESS_SIZE, + .val_bits = UPFPGA_REGISTER_SIZE, + .max_register = UPFPGA_REG_MAX, + .reg_read = upboard_fpga_read, + .reg_write = upboard_fpga_write, + .fast_io = false, + .cache_type = REGCACHE_RBTREE, + .rd_table = &upboard_up_readable_table, + .wr_table = &upboard_up_writable_table, +}; + +static struct upboard_led_data upboard_up_led_data[] = { + { .bit = 0, .colour = "yellow" }, + { .bit = 1, .colour = "green" }, + { .bit = 2, .colour = "red" }, +}; + +static const struct mfd_cell upboard_up_mfd_cells[] = { + { .name = "upboard-pinctrl" }, + MFD_CELL_BASIC("upboard-led", NULL, &upboard_up_led_data[0], + sizeof(*upboard_up_led_data), 0), + MFD_CELL_BASIC("upboard-led", NULL, &upboard_up_led_data[1], + sizeof(*upboard_up_led_data), 1), + MFD_CELL_BASIC("upboard-led", NULL, &upboard_up_led_data[2], + sizeof(*upboard_up_led_data), 2), +}; + +/* UP Squared 6000 EHL board */ + +static const struct upboard_fpga_data upboard_up_fpga_data = { + .cpld_config = &upboard_up_regmap_config, + .cells = upboard_up_mfd_cells, + .ncells = ARRAY_SIZE(upboard_up_mfd_cells), +}; + +static const struct mfd_cell upboard_pinctrl_cells[] = { + { .name = "upboard-pinctrl" }, +}; + +static const struct upboard_fpga_data upboard_pinctrl_data = { + .cpld_config = &upboard_up_regmap_config, + .cells = upboard_pinctrl_cells, + .ncells = ARRAY_SIZE(upboard_pinctrl_cells), +}; + +/* UP^2 board */ +static const struct regmap_range upboard_up2_readable_ranges[] = { + regmap_reg_range(UPFPGA_REG_PLATFORM_ID, UPFPGA_REG_FIRMWARE_ID), + regmap_reg_range(UPFPGA_REG_FUNC_EN0, UPFPGA_REG_FUNC_EN1), + regmap_reg_range(UPFPGA_REG_GPIO_EN0, UPFPGA_REG_GPIO_EN2), + regmap_reg_range(UPFPGA_REG_GPIO_DIR0, UPFPGA_REG_GPIO_DIR2), +}; + +static const struct regmap_range upboard_up2_writable_ranges[] = { + regmap_reg_range(UPFPGA_REG_FUNC_EN0, UPFPGA_REG_FUNC_EN1), + regmap_reg_range(UPFPGA_REG_GPIO_EN0, UPFPGA_REG_GPIO_EN2), + regmap_reg_range(UPFPGA_REG_GPIO_DIR0, UPFPGA_REG_GPIO_DIR2), +}; + +static const struct regmap_access_table upboard_up2_readable_table = { + .yes_ranges = upboard_up2_readable_ranges, + .n_yes_ranges = ARRAY_SIZE(upboard_up2_readable_ranges), +}; + +static const struct regmap_access_table upboard_up2_writable_table = { + .yes_ranges = upboard_up2_writable_ranges, + .n_yes_ranges = ARRAY_SIZE(upboard_up2_writable_ranges), +}; + +static const struct regmap_config upboard_up2_regmap_config = { + .reg_bits = UPFPGA_ADDRESS_SIZE, + .val_bits = UPFPGA_REGISTER_SIZE, + .max_register = UPFPGA_REG_MAX, + .reg_read = upboard_fpga_read, + .reg_write = upboard_fpga_write, + .fast_io = false, + .cache_type = REGCACHE_NONE, + .rd_table = &upboard_up2_readable_table, + .wr_table = &upboard_up2_writable_table, +}; + +static struct upboard_led_data upboard_up2_led_data[] = { + { .bit = 0, .colour = "blue" }, + { .bit = 1, .colour = "yellow" }, + { .bit = 2, .colour = "green" }, + { .bit = 3, .colour = "red" }, +}; + +static const struct mfd_cell upboard_up2_mfd_cells[] = { + { .name = "upboard-pinctrl" }, + MFD_CELL_BASIC("upboard-led", NULL, &upboard_up2_led_data[0], + sizeof(*upboard_up2_led_data), 0), + MFD_CELL_BASIC("upboard-led", NULL, &upboard_up2_led_data[1], + sizeof(*upboard_up2_led_data), 1), + MFD_CELL_BASIC("upboard-led", NULL, &upboard_up2_led_data[2], + sizeof(*upboard_up2_led_data), 2), + MFD_CELL_BASIC("upboard-led", NULL, &upboard_up2_led_data[3], + sizeof(*upboard_up2_led_data), 3), +}; + +static const struct upboard_fpga_data upboard_up2_fpga_data = { + .cpld_config = &upboard_up2_regmap_config, + .cells = upboard_up2_mfd_cells, + .ncells = ARRAY_SIZE(upboard_up2_mfd_cells), +}; + +/* UP-CRST02 carrier board for UP Core */ + +/* same MAX10 config as UP2, but same LED cells as UP1 */ +static const struct upboard_fpga_data upboard_upcore_crst02_fpga_data = { + .cpld_config = &upboard_up2_regmap_config, + .cells = upboard_up_mfd_cells, + .ncells = ARRAY_SIZE(upboard_up_mfd_cells), +}; + +static int __init upboard_fpga_gpio_init(struct upboard_fpga *fpga) +{ + enum gpiod_flags flags = fpga->uninitialised ? GPIOD_OUT_LOW : GPIOD_ASIS; + + fpga->enable_gpio = devm_gpiod_get(fpga->dev, "enable", flags); + if (IS_ERR(fpga->enable_gpio)) + return PTR_ERR(fpga->enable_gpio); + + fpga->clear_gpio = devm_gpiod_get(fpga->dev, "clear", GPIOD_OUT_LOW); + if (IS_ERR(fpga->clear_gpio)) + return PTR_ERR(fpga->clear_gpio); + + fpga->strobe_gpio = devm_gpiod_get(fpga->dev, "strobe", GPIOD_OUT_LOW); + if (IS_ERR(fpga->strobe_gpio)) + return PTR_ERR(fpga->strobe_gpio); + + fpga->datain_gpio = devm_gpiod_get(fpga->dev, "datain", GPIOD_OUT_LOW); + if (IS_ERR(fpga->datain_gpio)) + return PTR_ERR(fpga->datain_gpio); + + fpga->dataout_gpio = devm_gpiod_get(fpga->dev, "dataout", GPIOD_IN); + if (IS_ERR(fpga->dataout_gpio)) + return PTR_ERR(fpga->dataout_gpio); + + /* + * The SoC pinctrl driver may not support reserving the GPIO line for + * FPGA reset without causing an undesired reset pulse. This will clear + * any settings on the FPGA, so only do it if we must. + * Reset GPIO defaults HIGH, get GPIO and set to LOW, then set back to + * HIGH as a pulse. + */ + if (fpga->uninitialised) { + fpga->reset_gpio = devm_gpiod_get(fpga->dev, "reset", GPIOD_OUT_LOW); + if (IS_ERR(fpga->reset_gpio)) + return PTR_ERR(fpga->reset_gpio); + + gpiod_set_value(fpga->reset_gpio, 1); + } + + gpiod_set_value(fpga->enable_gpio, 1); + fpga->uninitialised = false; + + return 0; +} + +/* + * This function is for debugging with user for showing firmware information. + */ +static int __init upboard_fpga_show_firmware_info(struct upboard_fpga *fpga) +{ + unsigned int platform_id, manufacturer_id; + unsigned int firmware_id, build, major, minor, patch; + int ret; + + if (!fpga) + return -ENOMEM; + + ret = regmap_read(fpga->regmap, UPFPGA_REG_PLATFORM_ID, &platform_id); + if (ret) + return ret; + + manufacturer_id = platform_id & MENUFACTURER_ID_MASK; + if (manufacturer_id != AAEON_MANUFACTURER_ID) { + dev_err(fpga->dev, + "driver not compatible with custom FPGA FW from manufacturer id 0x%02x. Exiting", + manufacturer_id); + + return -ENODEV; + } + + ret = regmap_read(fpga->regmap, UPFPGA_REG_FIRMWARE_ID, &firmware_id); + if (ret) + return ret; + + build = (firmware_id >> FIRMWARE_ID_BUILD_OFFSET) & FIRMWARE_ID_MASK; + major = (firmware_id >> FIRMWARE_ID_MAJOR_OFFSET) & FIRMWARE_ID_MASK; + minor = (firmware_id >> FIRMWARE_ID_MINOR_OFFSET) & FIRMWARE_ID_MASK; + patch = (firmware_id >> FIRMWARE_ID_PATCH_OFFSET) & FIRMWARE_ID_MASK; + + if (major != SUPPORTED_FW_MAJOR) { + dev_err(fpga->dev, "unsupported FPGA FW v%u.%u.%u build 0x%02x", + major, minor, patch, build); + + return -ENODEV; + } + + dev_info(fpga->dev, "compatible FPGA FW v%u.%u.%u build 0x%02x", + major, minor, patch, build); + + return 0; +} + +/* + * MFD upboard-fpga is ACPI driver and can recognize the AANT ID from different + * kind of upboards. We get the LED GPIO initialized information from this + * then add led-upboard driver. + */ +int upboard_led_gpio_register(struct upboard_fpga *fpga) +{ + struct gpio_led blue_led, yellow_led, green_led, red_led; + struct gpio_desc *desc; + static struct gpio_led upboard_gpio_leds[4]; + int leds = 0; + static struct gpio_led_platform_data upboard_gpio_led_platform_data; + static const struct mfd_cell upboard_gpio_led_cells[] = { + MFD_CELL_BASIC("leds-gpio", NULL, + &upboard_gpio_led_platform_data, + sizeof(upboard_gpio_led_platform_data), 0) + }; + int ret; + + desc = devm_gpiod_get(fpga->dev, "blue", GPIOD_OUT_LOW); + if (!IS_ERR(desc)) { + blue_led.name = "upboard:blue:"; + blue_led.gpio = desc_to_gpio(desc); + blue_led.default_state = LEDS_GPIO_DEFSTATE_KEEP; + upboard_gpio_leds[leds++] = blue_led; + devm_gpiod_put(fpga->dev, desc); + } + desc = devm_gpiod_get(fpga->dev, "yellow", GPIOD_OUT_LOW); + if (!IS_ERR(desc)) { + yellow_led.name = "upboard:yellow:"; + yellow_led.gpio = desc_to_gpio(desc); + yellow_led.default_state = LEDS_GPIO_DEFSTATE_KEEP; + upboard_gpio_leds[leds++] = yellow_led; + devm_gpiod_put(fpga->dev, desc); + } + desc = devm_gpiod_get(fpga->dev, "green", GPIOD_OUT_LOW); + if (!IS_ERR(desc)) { + green_led.name = "upboard:green:"; + green_led.gpio = desc_to_gpio(desc); + green_led.default_state = LEDS_GPIO_DEFSTATE_KEEP; + upboard_gpio_leds[leds++] = green_led; + devm_gpiod_put(fpga->dev, desc); + } + desc = devm_gpiod_get(fpga->dev, "red", GPIOD_OUT_LOW); + if (!IS_ERR(desc)) { + red_led.name = "upboard:red:"; + red_led.gpio = desc_to_gpio(desc); + red_led.default_state = LEDS_GPIO_DEFSTATE_KEEP; + upboard_gpio_leds[leds++] = red_led; + devm_gpiod_put(fpga->dev, desc); + } + + /* no LEDs */ + if (leds == 0) + return 0; + + upboard_gpio_led_platform_data.num_leds = leds; + upboard_gpio_led_platform_data.leds = upboard_gpio_leds; + + ret = devm_mfd_add_devices(fpga->dev, PLATFORM_DEVID_AUTO, + upboard_gpio_led_cells, + ARRAY_SIZE(upboard_gpio_led_cells), + NULL, 0, NULL); + if (ret) { + dev_err(fpga->dev, "Failed to add GPIO LEDs,%d", ret); + return ret; + } + + return 0; +} + +static const struct acpi_device_id upboard_fpga_acpi_match[] = { + { "AANT0000", (kernel_ulong_t)&upboard_pinctrl_data }, + { "AANT0F00", (kernel_ulong_t)&upboard_up_fpga_data }, + { "AANT0F01", (kernel_ulong_t)&upboard_up2_fpga_data }, + { "AANT0F02", (kernel_ulong_t)&upboard_up_fpga_data }, + { "AANT0F03", (kernel_ulong_t)&upboard_upcore_crst02_fpga_data }, + { "AANT0F04", (kernel_ulong_t)&upboard_up_fpga_data }, + { } +}; +MODULE_DEVICE_TABLE(acpi, upboard_fpga_acpi_match); + +static int __init upboard_fpga_probe(struct platform_device *pdev) +{ + struct upboard_fpga *fpga; + const struct acpi_device_id *id; + const struct upboard_fpga_data *fpga_data; + int ret; + struct device *dev = &pdev->dev; + + id = acpi_match_device(upboard_fpga_acpi_match, dev); + if (!id) + return -ENODEV; + + fpga_data = (const struct upboard_fpga_data *) id->driver_data; + + fpga = devm_kzalloc(dev, sizeof(*fpga), GFP_KERNEL); + if (!fpga) + return -ENOMEM; + + platform_set_drvdata(pdev, fpga); + fpga->regmap = devm_regmap_init(dev, NULL, fpga, fpga_data->cpld_config); + fpga->cpld_config = (struct regmap_config *)fpga_data->cpld_config; + + if (IS_ERR(fpga->regmap)) + return PTR_ERR(fpga->regmap); + + ret = upboard_fpga_gpio_init(fpga); + if (ret) { + /* + * This is for compatiable with some upboards w/o FPGA firmware, + * so just showing debug info and do not return directly. + */ + dev_warn(dev, "Failed to initialize FPGA common GPIOs: %d", ret); + } else { + upboard_fpga_show_firmware_info(fpga); + } + + /* register GPIO LEDs */ + ret = upboard_led_gpio_register(fpga); + if (ret) { + /* + * This is for compatiable with some upboards w/o LEDs. + */ + dev_warn(dev, "Failed to register LEDs: %d", ret); + } + + return devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO, + fpga_data->cells, + fpga_data->ncells, + NULL, 0, NULL); +} + +static struct platform_driver upboard_fpga_driver = { + .driver = { + .name = "upboard-fpga", + .acpi_match_table = upboard_fpga_acpi_match, + }, +}; +module_platform_driver_probe(upboard_fpga_driver, upboard_fpga_probe); + +MODULE_AUTHOR("Gary Wang "); +MODULE_DESCRIPTION("UP Board CPLD/FPGA driver"); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/mfd/upboard-fpga.h b/include/linux/mfd/upboard-fpga.h new file mode 100644 index 000000000000..1fa073e5c53c --- /dev/null +++ b/include/linux/mfd/upboard-fpga.h @@ -0,0 +1,61 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * UP Board CPLD/FPGA driver + * + * Copyright (c) AAEON. All rights reserved. + * + * Author: Gary Wang + * + */ + +#ifndef __LINUX_MFD_UPBOARD_FPGA_H +#define __LINUX_MFD_UPBOARD_FPGA_H + +#include +#include + +/* CPLD/FPGA protocol version */ +#define UPFPGA_PROTOCOL_V1_HRV 1 +#define UPFPGA_PROTOCOL_V2_HRV 2 + +#define UPFPGA_ADDRESS_SIZE 7 +#define UPFPGA_REGISTER_SIZE 16 + +#define UPFPGA_READ_FLAG (1 << UPFPGA_ADDRESS_SIZE) + +enum upboard_fpgareg { + UPFPGA_REG_PLATFORM_ID = 0x10, + UPFPGA_REG_FIRMWARE_ID = 0x11, + UPFPGA_REG_FUNC_EN0 = 0x20, + UPFPGA_REG_FUNC_EN1 = 0x21, + UPFPGA_REG_GPIO_EN0 = 0x30, + UPFPGA_REG_GPIO_EN1 = 0x31, + UPFPGA_REG_GPIO_EN2 = 0x32, + UPFPGA_REG_GPIO_DIR0 = 0x40, + UPFPGA_REG_GPIO_DIR1 = 0x41, + UPFPGA_REG_GPIO_DIR2 = 0x42, + UPFPGA_REG_MAX, +}; + +struct upboard_fpga { + struct device *dev; + struct regmap *regmap; + struct regmap_config *cpld_config; + struct gpio_desc *enable_gpio; + struct gpio_desc *reset_gpio; + struct gpio_desc *clear_gpio; + struct gpio_desc *strobe_gpio; + struct gpio_desc *datain_gpio; + struct gpio_desc *dataout_gpio; + bool uninitialised; +}; + +struct upboard_led_data { + unsigned int bit; + const char *colour; +}; + +bool regmap_check_writeable(struct upboard_fpga *fpga, unsigned int reg); +int upboard_led_gpio_register(struct upboard_fpga *fpga); + +#endif /* __LINUX_MFD_UPBOARD_FPGA_H */ From patchwork Thu May 11 09:49:33 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "larry.lai" X-Patchwork-Id: 681458 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E3EEFC7EE2D for ; Thu, 11 May 2023 09:50:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237769AbjEKJuS (ORCPT ); Thu, 11 May 2023 05:50:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36172 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237776AbjEKJuP (ORCPT ); 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Thu, 11 May 2023 09:50:02 +0000 From: "larry.lai" To: lee@kernel.org, andriy.shevchenko@linux.intel.com, linus.walleij@linaro.org, pavel@ucw.cz Cc: linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-leds@vger.kernel.org, GaryWang@aaeon.com.tw, musa.lin@yunjingtech.com, jack.chang@yunjingtech.com, noah.hung@yunjingtech.com, michael.wang@yunjingtech.com, "larry.lai" Subject: [PATCH V4 2/3] pinctrl: Add support pin control for UP board CPLD/FPGA Date: Thu, 11 May 2023 17:49:33 +0800 Message-Id: <20230511094934.4941-3-larry.lai@yunjingtech.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230511094934.4941-1-larry.lai@yunjingtech.com> References: <20230511094934.4941-1-larry.lai@yunjingtech.com> X-ClientProxiedBy: SGXP274CA0015.SGPP274.PROD.OUTLOOK.COM (2603:1096:4:b8::27) To SG2PR06MB3742.apcprd06.prod.outlook.com (2603:1096:4:d8::14) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SG2PR06MB3742:EE_|KL1PR0601MB3876:EE_ X-MS-Office365-Filtering-Correlation-Id: 772cbb32-8bb8-4417-d3e6-08db5205173a X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Reported-by: kernel test robot Signed-off-by: larry.lai --- RFC 2023/04/25 -> PATCH V4 (1) Fixed kernel test robot compiler warning. (2) Remove mistakes with wrong Reviewed-by tags. RFC 2022/11/23 -> RFC 2023/04/25 (1) Refer 2022/12/08 Andy Shevchenko review, cleaned up coding style and addressed review comments. 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 . --- drivers/pinctrl/Kconfig | 14 + drivers/pinctrl/Makefile | 1 + drivers/pinctrl/pinctrl-upboard.c | 1296 +++++++++++++++++++++++++++++ 3 files changed, 1311 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..c9576bc80e79 --- /dev/null +++ b/drivers/pinctrl/pinctrl-upboard.c @@ -0,0 +1,1296 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * UP Board HAT pin controller driver + * remapping native pin to RPI pin and set CPLD pin dir + * + * Copyright (c) AAEON. All rights reserved. + * + * Authors: Gary Wang + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "core.h" +#include "intel/pinctrl-intel.h" + +/* Offset from regs */ +#define REVID 0x000 +#define REVID_SHIFT 16 +#define REVID_MASK GENMASK(31, 16) +#define PADBAR 0x00c + +/* 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 BOARD_UP_CHT01 0 +#define BOARD_UP_APL01 1 +#define BOARD_UP_UPCORE 2 +#define BOARD_UP_CORE_PLUS 3 +#define BOARD_AIOT_IP6801 4 +#define BOARD_UP_WHL01 5 +#define BOARD_UP_ISH 7 +#define BOARD_UPN_APL 8 +#define BOARD_UP_APL03 9 +#define BOARD_UPX_WHLite 10 +#define BOARD_UPX_TGL 11 +#define BOARD_UPX_EDGE_WHL2 12 +#define BOARD_UPN_EHL01 13 +#define BOARD_UPS_EHL01 14 +#define BOARD_UPX_ADLP01 15 +#define BOARD_UPN_ADLN01 16 +#define BOARD_UPS_ADLP01 15 + +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 UPBOARD_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 __attribute__((unused)) pin_groups[] = { + UPBOARD_PIN_GROUP("uart1_grp", uart1_pins), + UPBOARD_PIN_GROUP("uart2_grp", uart2_pins), + UPBOARD_PIN_GROUP("i2c0_grp", i2c0_pins), + UPBOARD_PIN_GROUP("i2c1_grp", i2c1_pins), + UPBOARD_PIN_GROUP("spi2_grp", spi2_pins), + UPBOARD_PIN_GROUP("i2s0_grp", i2s0_pins), + UPBOARD_PIN_GROUP("pwm0_grp", pwm0_pins), + UPBOARD_PIN_GROUP("pwm1_grp", pwm1_pins), + UPBOARD_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 __attribute__((unused)) 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; + + 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; + + 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; + + 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 int upboard_alt_func_enable(struct gpio_chip *gc, const char *name, int id) +{ + struct upboard_pinctrl *pctrl = container_of(gc, struct upboard_pinctrl, chip); + int *offset; + int i, cnt; + + offset = kmalloc(pctrl->pctldesc->npins * sizeof(int), GFP_KERNEL); + if (!offset) + return -ENOMEM; + + /* 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)) + return 0; /* 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; + bool input = false; + int mode = 1; /* default */ + unsigned int val = readl(pctrl->pins[offset[i]].regs); + + if (strstr(pctrl->pctldesc->pins[offset[i]].name, "I2C")) { + switch (id) { + case BOARD_UPN_ADLN01: + case BOARD_UPX_ADLP01: + mode = 2; + break; + default: + break; + } + val |= mode<pins[offset[i]].regs); + upboard_fpga_request_free(pctrl->pctldev, offset[i]); + continue; + } else if (strstr(pctrl->pctldesc->pins[offset[i]].name, "UART")) { + switch (id) { + case BOARD_UPN_EHL01: + case BOARD_UPS_EHL01: + mode = 4; + break; + case BOARD_UPN_ADLN01: + case BOARD_UPX_ADLP01: + mode = 2; + break; + default: + break; + } + } else if (strstr(pctrl->pctldesc->pins[offset[i]].name, "SPI")) { + switch (id) { + case BOARD_UP_WHL01: + mode = 3; + break; + case BOARD_UPN_ADLN01: + case BOARD_UPX_ADLP01: + mode = 7; + if (strstr(pctrl->pctldesc->pins[offset[i]].name, "MOSI")) { + val &= ~PADCFG0_GPIOTXDIS; + val |= PADCFG0_GPIORXDIS; + } + if (strstr(pctrl->pctldesc->pins[offset[i]].name, "MISO")) { + val |= PADCFG0_GPIORXDIS; + } + if (strstr(pctrl->pctldesc->pins[offset[i]].name, "CLK")) { + val &= ~PADCFG0_GPIOTXDIS; + val |= PADCFG0_GPIORXDIS; + } + if (strstr(pctrl->pctldesc->pins[offset[i]].name, "CS0")) { + val |= PADCFG0_GPIORXDIS; + } + if (strstr(pctrl->pctldesc->pins[offset[i]].name, "CS1")) { + continue; + } + break; + default: + break; + } + } else if (strstr(pctrl->pctldesc->pins[offset[i]].name, "I2S")) { + switch (id) { + case BOARD_UPX_ADLP01: + mode = 4; + break; + default: + break; + } + } + val |= mode<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; + if (strstr(pctrl->pctldesc->pins[offset[i]].name, "SDI")) + input = true; + upboard_fpga_set_direction(pctrl->pctldev, NULL, offset[i], input); + } + + kfree(offset); + + return 0; +} + +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) +{ + int gpio = upboard_rpi_to_native_gpio(gc, offset); + + 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; + char *p; + + name = kmalloc(strlen(pctrl->pctldesc->pins[pin].name) + 1, GFP_KERNEL); + if (!name) { + dev_err(gc->parent, "Failed to kmalloc"); + return; + } + pinctrl_gpio_free(gpio); + + strcpy(name, pctrl->pctldesc->pins[pin].name); + p = name; + upboard_alt_func_enable(gc, strsep(&p, "_"), pctrl->ident); + + kfree(name); +} + +static int upboard_gpio_get(struct gpio_chip *gc, unsigned int offset) +{ + int gpio = upboard_rpi_to_native_gpio(gc, offset); + + 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); + + gpiod_set_value(gpio_to_desc(gpio), value); + + /* APL03 board open drain GPIO */ + if (pctrl->ident == BOARD_UP_APL03) { + 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); + + 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); + + return gpiod_direction_output(gpio_to_desc(gpio), value); +} + +static void __iomem *upboard_get_regs(struct gpio_chip *gc, unsigned int gpio, unsigned int reg) +{ + struct platform_device *pdev = to_platform_device(gc->parent); + struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + struct intel_pinctrl *pctrl = gpiochip_get_data(gc); + size_t nregs; + void __iomem *base = NULL; + u32 offset, value; + int pin = gpio-gc->base; + + /* check Intel pin controller for all platform */ + if (pctrl->ncommunities > 1) { + int i, j, offset = 0; + + pin = -1; + for (i = 0; i < pctrl->ncommunities; i++) { + struct intel_community *community = &pctrl->communities[i]; + + for (j = 0; j < community->ngpps ; j++) { + struct intel_padgroup gpps = community->gpps[j]; + + if (gpio < gc->base + gpps.gpio_base + gpps.size) { + res = platform_get_resource(pdev, IORESOURCE_MEM, + community->barno); + pin = gpio-gc->base-gpps.gpio_base + + offset-community->pin_base; + break; + } + + offset += gpps.size; + } + + if (pin != -1) + break; + } + } + + base = devm_ioremap(&pdev->dev, res->start, resource_size(res)); + if (base == NULL) + return base; + + 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; +} + +static 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 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 = { + { + .ident = (const char *) BOARD_UP_APL03, + .matches = { /* UP 4000 */ + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "AAEON"), + DMI_EXACT_MATCH(DMI_BOARD_NAME, "UP-APL03"), + }, + }, + { + .ident = (const char *) BOARD_UP_WHL01, + .matches = { /* UPX WHL */ + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "AAEON"), + DMI_EXACT_MATCH(DMI_BOARD_NAME, "UP-WHL01"), + }, + }, + { + .ident = (const char *) BOARD_UPX_TGL, + .matches = { /* UP i11 */ + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "AAEON"), + DMI_EXACT_MATCH(DMI_BOARD_NAME, "UPX-TGL01"), + }, + }, + { + .ident = (const char *) BOARD_UPN_EHL01, + .matches = { /* UP 6000 */ + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "AAEON"), + DMI_EXACT_MATCH(DMI_BOARD_NAME, "UPN-EHL01"), + }, + }, + { + .ident = (const char *) BOARD_UPS_EHL01, + .matches = { /* UP squared v2 */ + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "AAEON"), + DMI_EXACT_MATCH(DMI_BOARD_NAME, "UPS-EHL01"), + }, + }, + { + .ident = (const char *) BOARD_UPX_ADLP01, + .matches = { /* UP Xtreme i12 */ + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "AAEON"), + DMI_EXACT_MATCH(DMI_BOARD_NAME, "UPX-ADLP01"), + }, + }, + { + .ident = (const char *) BOARD_UPN_ADLN01, + .matches = { /* UP 7000 */ + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "AAEON"), + DMI_EXACT_MATCH(DMI_BOARD_NAME, "UPN-ADLN01"), + }, + }, + { + .ident = (const char *) BOARD_UPS_ADLP01, + .matches = { /* UP Squared i12 */ + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "AAEON"), + DMI_EXACT_MATCH(DMI_BOARD_NAME, "UPS-ADLP01"), + }, + }, + { } /* Terminating entry */ +}; + +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; + + /* set pin desc and rpi GPIO mapping table by HID */ + 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_kcalloc(&pdev->dev, pctldesc->npins, sizeof(*pins), 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; + + 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; + + 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; + + 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; + + /* set output by default */ + regmap_field_write(pin->dirbit, false); + } + + /* 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; + + 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; + + /* check for special board versions that require register patches */ + system_id = dmi_first_match(upboard_dmi_table); + if (system_id) + pctrl->ident = (int) system_id->ident; + else + pctrl->ident = BOARD_UP_APL03; + + upboard_alt_func_enable(&pctrl->chip, "I2C", pctrl->ident); + upboard_alt_func_enable(&pctrl->chip, "SPI", pctrl->ident); + upboard_alt_func_enable(&pctrl->chip, "SPI1", pctrl->ident); + upboard_alt_func_enable(&pctrl->chip, "SPI2", pctrl->ident); + upboard_alt_func_enable(&pctrl->chip, "UART", pctrl->ident); + upboard_alt_func_enable(&pctrl->chip, "I2S", pctrl->ident); + upboard_alt_func_enable(&pctrl->chip, "PWM", pctrl->ident); + upboard_alt_func_enable(&pctrl->chip, "ADC", pctrl->ident); + /* I2C pin mux by CPLD in UP2 */ + upboard_alt_func_enable(&pctrl->chip, "NONAME", pctrl->ident); + + 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 "); +MODULE_DESCRIPTION("UP Board HAT pin controller driver"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:upboard-pinctrl"); From patchwork Thu May 11 09:49:34 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "larry.lai" X-Patchwork-Id: 681032 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AEC83C7EE22 for ; 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Thu, 11 May 2023 09:50:04 +0000 Received: from SG2PR06MB3742.apcprd06.prod.outlook.com ([fe80::e5e4:d643:2a1b:fea0]) by SG2PR06MB3742.apcprd06.prod.outlook.com ([fe80::e5e4:d643:2a1b:fea0%3]) with mapi id 15.20.6363.033; Thu, 11 May 2023 09:50:04 +0000 From: "larry.lai" To: lee@kernel.org, andriy.shevchenko@linux.intel.com, linus.walleij@linaro.org, pavel@ucw.cz Cc: linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-leds@vger.kernel.org, GaryWang@aaeon.com.tw, musa.lin@yunjingtech.com, jack.chang@yunjingtech.com, noah.hung@yunjingtech.com, michael.wang@yunjingtech.com, "larry.lai" Subject: [PATCH V4 3/3] leds: Add support for UP board CPLD onboard LEDS Date: Thu, 11 May 2023 17:49:34 +0800 Message-Id: <20230511094934.4941-4-larry.lai@yunjingtech.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230511094934.4941-1-larry.lai@yunjingtech.com> References: <20230511094934.4941-1-larry.lai@yunjingtech.com> X-ClientProxiedBy: SGXP274CA0015.SGPP274.PROD.OUTLOOK.COM (2603:1096:4:b8::27) To SG2PR06MB3742.apcprd06.prod.outlook.com (2603:1096:4:d8::14) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SG2PR06MB3742:EE_|KL1PR0601MB3876:EE_ X-MS-Office365-Filtering-Correlation-Id: 855aca9f-1486-45a4-6fa6-08db52051881 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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DIR:OUT; SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: yunjingtech.com X-MS-Exchange-CrossTenant-Network-Message-Id: 855aca9f-1486-45a4-6fa6-08db52051881 X-MS-Exchange-CrossTenant-AuthSource: SG2PR06MB3742.apcprd06.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 May 2023 09:50:04.6630 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: be2d5505-f7e6-4600-bbe2-b3201c91b344 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: wUSC7rSh0m6O3APA0NPwL3nUmyFaJpNPPTrHOALs4o18tsMmqHgHqBuTGxRvspiSTm9kbajki51bsmfINOEzhBX4hIUK+AGEUI23Hno2Cl4= X-MS-Exchange-Transport-CrossTenantHeadersStamped: KL1PR0601MB3876 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org The UP boards come with a few FPGA-controlled onboard LEDs: * UP Board: yellow, green, red * UP Squared: blue, yellow, green, red This patch depends on patch "mfd: Add support for UP board CPLD/FPGA". Signed-off-by: larry.lai --- RFC 2023/04/25 -> PATCH V4 (1) Fixed kernel test robot compiler warning. (2) Remove mistakes with wrong Reviewed-by tags. RFC 2022/11/23 --> RFC 2023/04/25: Refer 2022/12/08 Lee Jones review, cleaned up coding style. PATCH V3 -> RFC 2022/11/23: Update the changes Copyright. PATCH V1 -> V3: There is no change. PATCH --> PATCH V1: Refer 2022/10/03 Andy Shevchenko review, cleaned up coding style. --- drivers/leds/Kconfig | 10 +++++ drivers/leds/Makefile | 1 + drivers/leds/leds-upboard.c | 79 +++++++++++++++++++++++++++++++++++++ 3 files changed, 90 insertions(+) create mode 100644 drivers/leds/leds-upboard.c diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index 499d0f215a8b..d9d533cb38ca 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -872,6 +872,16 @@ source "drivers/leds/flash/Kconfig" comment "RGB LED drivers" source "drivers/leds/rgb/Kconfig" +config LEDS_UPBOARD + tristate "LED support for the UP board" + depends on LEDS_CLASS + depends on MFD_INTEL_UPBOARD_FPGA + help + This option enables support for the UP board LEDs. + + To compile this driver as a module, choose M here: the module + will be called leds-upboard. + comment "LED Triggers" source "drivers/leds/trigger/Kconfig" diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index 4fd2f92cd198..e72956645646 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -83,6 +83,7 @@ obj-$(CONFIG_LEDS_TI_LMU_COMMON) += leds-ti-lmu-common.o obj-$(CONFIG_LEDS_TLC591XX) += leds-tlc591xx.o obj-$(CONFIG_LEDS_TPS6105X) += leds-tps6105x.o obj-$(CONFIG_LEDS_TURRIS_OMNIA) += leds-turris-omnia.o +obj-$(CONFIG_LEDS_UPBOARD) += leds-upboard.o obj-$(CONFIG_LEDS_WM831X_STATUS) += leds-wm831x-status.o obj-$(CONFIG_LEDS_WM8350) += leds-wm8350.o obj-$(CONFIG_LEDS_WRAP) += leds-wrap.o diff --git a/drivers/leds/leds-upboard.c b/drivers/leds/leds-upboard.c new file mode 100644 index 000000000000..8a44afe8c526 --- /dev/null +++ b/drivers/leds/leds-upboard.c @@ -0,0 +1,79 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * UP Board CPLD/FPGA based LED driver + * + * Copyright (c) AAEON. All rights reserved. + * + * Author: Gary Wang + */ + +#include +#include +#include +#include +#include +#include + +struct upboard_led { + struct regmap_field *field; + struct led_classdev cdev; + unsigned char bit; +}; + +static enum led_brightness upboard_led_brightness_get(struct led_classdev *cdev) +{ + struct upboard_led *led = container_of(cdev, struct upboard_led, cdev); + int brightness = 0; + + regmap_field_read(led->field, &brightness); + + return brightness; +}; + +static void upboard_led_brightness_set(struct led_classdev *cdev, enum led_brightness brightness) +{ + struct upboard_led *led = container_of(cdev, struct upboard_led, cdev); + + regmap_field_write(led->field, brightness != LED_OFF); +}; + +static int __init upboard_led_probe(struct platform_device *pdev) +{ + struct upboard_fpga * const up_fpga = dev_get_drvdata(pdev->dev.parent); + struct reg_field fldconf = { + .reg = UPFPGA_REG_FUNC_EN0, + }; + struct upboard_led_data * const pdata = pdev->dev.platform_data; + struct upboard_led *led; + + led = devm_kzalloc(&pdev->dev, sizeof(*led), GFP_KERNEL); + if (!led) + return -ENOMEM; + + fldconf.lsb = pdata->bit; + fldconf.msb = pdata->bit; + led->field = devm_regmap_field_alloc(&pdev->dev, up_fpga->regmap, fldconf); + if (IS_ERR(led->field)) + return PTR_ERR(led->field); + + led->cdev.brightness_get = upboard_led_brightness_get; + led->cdev.brightness_set = upboard_led_brightness_set; + led->cdev.name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "upboard:%s:", + pdata->colour); + if (!led->cdev.name) + return -ENOMEM; + + return devm_led_classdev_register(&pdev->dev, &led->cdev); +}; + +static struct platform_driver upboard_led_driver = { + .driver = { + .name = "upboard-led", + }, +}; +module_platform_driver_probe(upboard_led_driver, upboard_led_probe); + +MODULE_AUTHOR("Gary Wang "); +MODULE_DESCRIPTION("UP Board LED driver"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:upboard-led");