--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Pinctrl driver for the T-Head TH1520 SoC
+ *
+ * Copyright (C) 2023 Emil Renner Berthing <emil.renner.berthing@canonical.com>
+ */
+
+#include <linux/array_size.h>
+#include <linux/bits.h>
+#include <linux/cleanup.h>
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/io.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/seq_file.h>
+#include <linux/spinlock.h>
+
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+
+#include "core.h"
+#include "pinmux.h"
+#include "pinconf.h"
+
+#define TH1520_PADCFG_IE BIT(9)
+#define TH1520_PADCFG_SL BIT(8)
+#define TH1520_PADCFG_ST BIT(7)
+#define TH1520_PADCFG_SPU BIT(6)
+#define TH1520_PADCFG_PS BIT(5)
+#define TH1520_PADCFG_PE BIT(4)
+#define TH1520_PADCFG_BIAS (TH1520_PADCFG_SPU | TH1520_PADCFG_PS | TH1520_PADCFG_PE)
+#define TH1520_PADCFG_DS GENMASK(3, 0)
+
+#define TH1520_PULL_DOWN_OHM 44000 /* typ. 44kOhm */
+#define TH1520_PULL_UP_OHM 48000 /* typ. 48kOhm */
+#define TH1520_PULL_STRONG_OHM 2100 /* typ. 2.1kOhm */
+
+#define TH1520_PAD_NO_PADCFG BIT(30)
+#define TH1520_PAD_MUXDATA GENMASK(29, 0)
+
+struct th1520_pad_group {
+ const char *name;
+ const struct pinctrl_pin_desc *pins;
+ unsigned int npins;
+};
+
+struct th1520_pinctrl {
+ struct pinctrl_desc desc;
+ struct mutex mutex; /* serialize adding functions */
+ raw_spinlock_t lock; /* serialize register access */
+ void __iomem *base;
+ struct pinctrl_dev *pctl;
+};
+
+static void __iomem *th1520_padcfg(struct th1520_pinctrl *thp,
+ unsigned int pin)
+{
+ return thp->base + 4 * (pin / 2);
+}
+
+static unsigned int th1520_padcfg_shift(unsigned int pin)
+{
+ return 16 * (pin & BIT(0));
+}
+
+static void __iomem *th1520_muxcfg(struct th1520_pinctrl *thp,
+ unsigned int pin)
+{
+ return thp->base + 0x400 + 4 * (pin / 8);
+}
+
+static unsigned int th1520_muxcfg_shift(unsigned int pin)
+{
+ return 4 * (pin & GENMASK(2, 0));
+}
+
+enum th1520_muxtype {
+ TH1520_MUX_____,
+ TH1520_MUX_GPIO,
+ TH1520_MUX_PWM,
+ TH1520_MUX_UART,
+ TH1520_MUX_IR,
+ TH1520_MUX_I2C,
+ TH1520_MUX_SPI,
+ TH1520_MUX_QSPI,
+ TH1520_MUX_SDIO,
+ TH1520_MUX_AUD,
+ TH1520_MUX_I2S,
+ TH1520_MUX_MAC0,
+ TH1520_MUX_MAC1,
+ TH1520_MUX_DPU0,
+ TH1520_MUX_DPU1,
+ TH1520_MUX_ISP,
+ TH1520_MUX_HDMI,
+ TH1520_MUX_BSEL,
+ TH1520_MUX_DBG,
+ TH1520_MUX_CLK,
+ TH1520_MUX_JTAG,
+ TH1520_MUX_ISO,
+ TH1520_MUX_FUSE,
+ TH1520_MUX_RST,
+};
+
+static const char *const th1520_muxtype_string[] = {
+ [TH1520_MUX_GPIO] = "gpio",
+ [TH1520_MUX_PWM] = "pwm",
+ [TH1520_MUX_UART] = "uart",
+ [TH1520_MUX_IR] = "ir",
+ [TH1520_MUX_I2C] = "i2c",
+ [TH1520_MUX_SPI] = "spi",
+ [TH1520_MUX_QSPI] = "qspi",
+ [TH1520_MUX_SDIO] = "sdio",
+ [TH1520_MUX_AUD] = "audio",
+ [TH1520_MUX_I2S] = "i2s",
+ [TH1520_MUX_MAC0] = "gmac0",
+ [TH1520_MUX_MAC1] = "gmac1",
+ [TH1520_MUX_DPU0] = "dpu0",
+ [TH1520_MUX_DPU1] = "dpu1",
+ [TH1520_MUX_ISP] = "isp",
+ [TH1520_MUX_HDMI] = "hdmi",
+ [TH1520_MUX_BSEL] = "bootsel",
+ [TH1520_MUX_DBG] = "debug",
+ [TH1520_MUX_CLK] = "clock",
+ [TH1520_MUX_JTAG] = "jtag",
+ [TH1520_MUX_ISO] = "iso7816",
+ [TH1520_MUX_FUSE] = "efuse",
+ [TH1520_MUX_RST] = "reset",
+};
+
+static enum th1520_muxtype th1520_muxtype_get(const char *str)
+{
+ enum th1520_muxtype mt;
+
+ for (mt = TH1520_MUX_GPIO; mt < ARRAY_SIZE(th1520_muxtype_string); mt++) {
+ if (!strcmp(str, th1520_muxtype_string[mt]))
+ return mt;
+ }
+ return TH1520_MUX_____;
+}
+
+#define TH1520_PAD(_nr, _name, m0, m1, m2, m3, m4, m5, _flags) \
+ { .number = _nr, .name = #_name, .drv_data = (void *)((_flags) | \
+ (TH1520_MUX_##m0 << 0) | (TH1520_MUX_##m1 << 5) | (TH1520_MUX_##m2 << 10) | \
+ (TH1520_MUX_##m3 << 15) | (TH1520_MUX_##m4 << 20) | (TH1520_MUX_##m5 << 25)) }
+
+static const struct pinctrl_pin_desc th1520_group1_pins[] = {
+ TH1520_PAD(0, OSC_CLK_IN, ____, ____, ____, ____, ____, ____, TH1520_PAD_NO_PADCFG),
+ TH1520_PAD(1, OSC_CLK_OUT, ____, ____, ____, ____, ____, ____, TH1520_PAD_NO_PADCFG),
+ TH1520_PAD(2, SYS_RST_N, ____, ____, ____, ____, ____, ____, TH1520_PAD_NO_PADCFG),
+ TH1520_PAD(3, RTC_CLK_IN, ____, ____, ____, ____, ____, ____, TH1520_PAD_NO_PADCFG),
+ TH1520_PAD(4, RTC_CLK_OUT, ____, ____, ____, ____, ____, ____, TH1520_PAD_NO_PADCFG),
+ /* skip number 5 so we can calculate register offsets and shifts from the pin number */
+ TH1520_PAD(6, TEST_MODE, ____, ____, ____, ____, ____, ____, TH1520_PAD_NO_PADCFG),
+ TH1520_PAD(7, DEBUG_MODE, DBG, ____, ____, GPIO, ____, ____, TH1520_PAD_NO_PADCFG),
+ TH1520_PAD(8, POR_SEL, ____, ____, ____, ____, ____, ____, TH1520_PAD_NO_PADCFG),
+ TH1520_PAD(9, I2C_AON_SCL, I2C, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(10, I2C_AON_SDA, I2C, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(11, CPU_JTG_TCLK, JTAG, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(12, CPU_JTG_TMS, JTAG, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(13, CPU_JTG_TDI, JTAG, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(14, CPU_JTG_TDO, JTAG, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(15, CPU_JTG_TRST, JTAG, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(16, AOGPIO_7, CLK, AUD, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(17, AOGPIO_8, UART, AUD, IR, GPIO, ____, ____, 0),
+ TH1520_PAD(18, AOGPIO_9, UART, AUD, IR, GPIO, ____, ____, 0),
+ TH1520_PAD(19, AOGPIO_10, CLK, AUD, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(20, AOGPIO_11, GPIO, AUD, ____, ____, ____, ____, 0),
+ TH1520_PAD(21, AOGPIO_12, GPIO, AUD, ____, ____, ____, ____, 0),
+ TH1520_PAD(22, AOGPIO_13, GPIO, AUD, ____, ____, ____, ____, 0),
+ TH1520_PAD(23, AOGPIO_14, GPIO, AUD, ____, ____, ____, ____, 0),
+ TH1520_PAD(24, AOGPIO_15, GPIO, AUD, ____, ____, ____, ____, 0),
+ TH1520_PAD(25, AUDIO_PA0, AUD, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(26, AUDIO_PA1, AUD, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(27, AUDIO_PA2, AUD, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(28, AUDIO_PA3, AUD, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(29, AUDIO_PA4, AUD, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(30, AUDIO_PA5, AUD, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(31, AUDIO_PA6, AUD, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(32, AUDIO_PA7, AUD, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(33, AUDIO_PA8, AUD, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(34, AUDIO_PA9, AUD, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(35, AUDIO_PA10, AUD, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(36, AUDIO_PA11, AUD, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(37, AUDIO_PA12, AUD, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(38, AUDIO_PA13, AUD, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(39, AUDIO_PA14, AUD, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(40, AUDIO_PA15, AUD, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(41, AUDIO_PA16, AUD, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(42, AUDIO_PA17, AUD, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(43, AUDIO_PA27, AUD, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(44, AUDIO_PA28, AUD, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(45, AUDIO_PA29, AUD, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(46, AUDIO_PA30, AUD, RST, ____, GPIO, ____, ____, 0),
+};
+
+static const struct pinctrl_pin_desc th1520_group2_pins[] = {
+ TH1520_PAD(0, QSPI1_SCLK, QSPI, ISO, ____, GPIO, FUSE, ____, 0),
+ TH1520_PAD(1, QSPI1_CSN0, QSPI, ____, I2C, GPIO, FUSE, ____, 0),
+ TH1520_PAD(2, QSPI1_D0_MOSI, QSPI, ISO, I2C, GPIO, FUSE, ____, 0),
+ TH1520_PAD(3, QSPI1_D1_MISO, QSPI, ISO, ____, GPIO, FUSE, ____, 0),
+ TH1520_PAD(4, QSPI1_D2_WP, QSPI, ISO, UART, GPIO, FUSE, ____, 0),
+ TH1520_PAD(5, QSPI1_D3_HOLD, QSPI, ISO, UART, GPIO, ____, ____, 0),
+ TH1520_PAD(6, I2C0_SCL, I2C, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(7, I2C0_SDA, I2C, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(8, I2C1_SCL, I2C, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(9, I2C1_SDA, I2C, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(10, UART1_TXD, UART, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(11, UART1_RXD, UART, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(12, UART4_TXD, UART, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(13, UART4_RXD, UART, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(14, UART4_CTSN, UART, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(15, UART4_RTSN, UART, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(16, UART3_TXD, DBG, UART, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(17, UART3_RXD, DBG, UART, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(18, GPIO0_18, GPIO, I2C, ____, ____, ____, ____, 0),
+ TH1520_PAD(19, GPIO0_19, GPIO, I2C, ____, ____, ____, ____, 0),
+ TH1520_PAD(20, GPIO0_20, GPIO, UART, IR, ____, ____, ____, 0),
+ TH1520_PAD(21, GPIO0_21, GPIO, UART, IR, ____, DPU0, DPU1, 0),
+ TH1520_PAD(22, GPIO0_22, GPIO, JTAG, I2C, ____, DPU0, DPU1, 0),
+ TH1520_PAD(23, GPIO0_23, GPIO, JTAG, I2C, ____, DPU0, DPU1, 0),
+ TH1520_PAD(24, GPIO0_24, GPIO, JTAG, QSPI, ____, DPU0, DPU1, 0),
+ TH1520_PAD(25, GPIO0_25, GPIO, JTAG, ____, ____, DPU0, DPU1, 0),
+ TH1520_PAD(26, GPIO0_26, GPIO, JTAG, ____, ____, DPU0, DPU1, 0),
+ TH1520_PAD(27, GPIO0_27, GPIO, ____, I2C, ____, DPU0, DPU1, 0),
+ TH1520_PAD(28, GPIO0_28, GPIO, ____, I2C, ____, DPU0, DPU1, 0),
+ TH1520_PAD(29, GPIO0_29, GPIO, ____, ____, ____, DPU0, DPU1, 0),
+ TH1520_PAD(30, GPIO0_30, GPIO, ____, ____, ____, DPU0, DPU1, 0),
+ TH1520_PAD(31, GPIO0_31, GPIO, ____, ____, ____, DPU0, DPU1, 0),
+ TH1520_PAD(32, GPIO1_0, GPIO, JTAG, ____, ____, DPU0, DPU1, 0),
+ TH1520_PAD(33, GPIO1_1, GPIO, JTAG, ____, ____, DPU0, DPU1, 0),
+ TH1520_PAD(34, GPIO1_2, GPIO, JTAG, ____, ____, DPU0, DPU1, 0),
+ TH1520_PAD(35, GPIO1_3, GPIO, JTAG, ____, ____, DPU0, DPU1, 0),
+ TH1520_PAD(36, GPIO1_4, GPIO, JTAG, ____, ____, DPU0, DPU1, 0),
+ TH1520_PAD(37, GPIO1_5, GPIO, ____, ____, ____, DPU0, DPU1, 0),
+ TH1520_PAD(38, GPIO1_6, GPIO, ____, ____, ____, DPU0, DPU1, 0),
+ TH1520_PAD(39, GPIO1_7, GPIO, QSPI, ____, ____, DPU0, DPU1, 0),
+ TH1520_PAD(40, GPIO1_8, GPIO, QSPI, ____, ____, DPU0, DPU1, 0),
+ TH1520_PAD(41, GPIO1_9, GPIO, QSPI, ____, ____, DPU0, DPU1, 0),
+ TH1520_PAD(42, GPIO1_10, GPIO, QSPI, ____, ____, DPU0, DPU1, 0),
+ TH1520_PAD(43, GPIO1_11, GPIO, QSPI, ____, ____, DPU0, DPU1, 0),
+ TH1520_PAD(44, GPIO1_12, GPIO, QSPI, ____, ____, DPU0, DPU1, 0),
+ TH1520_PAD(45, GPIO1_13, GPIO, UART, ____, ____, DPU0, DPU1, 0),
+ TH1520_PAD(46, GPIO1_14, GPIO, UART, ____, ____, DPU0, DPU1, 0),
+ TH1520_PAD(47, GPIO1_15, GPIO, UART, ____, ____, DPU0, DPU1, 0),
+ TH1520_PAD(48, GPIO1_16, GPIO, UART, ____, ____, DPU0, DPU1, 0),
+ TH1520_PAD(49, CLK_OUT_0, BSEL, CLK, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(50, CLK_OUT_1, BSEL, CLK, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(51, CLK_OUT_2, BSEL, CLK, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(52, CLK_OUT_3, BSEL, CLK, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(53, GPIO1_21, GPIO, ____, ISP, ____, ____, ____, 0),
+ TH1520_PAD(54, GPIO1_22, GPIO, ____, ISP, ____, ____, ____, 0),
+ TH1520_PAD(55, GPIO1_23, GPIO, ____, ISP, ____, ____, ____, 0),
+ TH1520_PAD(56, GPIO1_24, GPIO, ____, ISP, ____, ____, ____, 0),
+ TH1520_PAD(57, GPIO1_25, GPIO, ____, ISP, ____, ____, ____, 0),
+ TH1520_PAD(58, GPIO1_26, GPIO, ____, ISP, ____, ____, ____, 0),
+ TH1520_PAD(59, GPIO1_27, GPIO, ____, ISP, ____, ____, ____, 0),
+ TH1520_PAD(60, GPIO1_28, GPIO, ____, ISP, ____, ____, ____, 0),
+ TH1520_PAD(61, GPIO1_29, GPIO, ____, ISP, ____, ____, ____, 0),
+ TH1520_PAD(62, GPIO1_30, GPIO, ____, ISP, ____, ____, ____, 0),
+};
+
+static const struct pinctrl_pin_desc th1520_group3_pins[] = {
+ TH1520_PAD(0, UART0_TXD, UART, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(1, UART0_RXD, UART, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(2, QSPI0_SCLK, QSPI, PWM, I2S, GPIO, ____, ____, 0),
+ TH1520_PAD(3, QSPI0_CSN0, QSPI, PWM, I2S, GPIO, ____, ____, 0),
+ TH1520_PAD(4, QSPI0_CSN1, QSPI, PWM, I2S, GPIO, ____, ____, 0),
+ TH1520_PAD(5, QSPI0_D0_MOSI, QSPI, PWM, I2S, GPIO, ____, ____, 0),
+ TH1520_PAD(6, QSPI0_D1_MISO, QSPI, PWM, I2S, GPIO, ____, ____, 0),
+ TH1520_PAD(7, QSPI0_D2_WP, QSPI, PWM, I2S, GPIO, ____, ____, 0),
+ TH1520_PAD(8, QSPI1_D3_HOLD, QSPI, ____, I2S, GPIO, ____, ____, 0),
+ TH1520_PAD(9, I2C2_SCL, I2C, UART, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(10, I2C2_SDA, I2C, UART, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(11, I2C3_SCL, I2C, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(12, I2C3_SDA, I2C, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(13, GPIO2_13, GPIO, SPI, ____, ____, ____, ____, 0),
+ TH1520_PAD(14, SPI_SCLK, SPI, UART, IR, GPIO, ____, ____, 0),
+ TH1520_PAD(15, SPI_CSN, SPI, UART, IR, GPIO, ____, ____, 0),
+ TH1520_PAD(16, SPI_MOSI, SPI, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(17, SPI_MISO, SPI, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(18, GPIO2_18, GPIO, MAC1, ____, ____, ____, ____, 0),
+ TH1520_PAD(19, GPIO2_19, GPIO, MAC1, ____, ____, ____, ____, 0),
+ TH1520_PAD(20, GPIO2_20, GPIO, MAC1, ____, ____, ____, ____, 0),
+ TH1520_PAD(21, GPIO2_21, GPIO, MAC1, ____, ____, ____, ____, 0),
+ TH1520_PAD(22, GPIO2_22, GPIO, MAC1, ____, ____, ____, ____, 0),
+ TH1520_PAD(23, GPIO2_23, GPIO, MAC1, ____, ____, ____, ____, 0),
+ TH1520_PAD(24, GPIO2_24, GPIO, MAC1, ____, ____, ____, ____, 0),
+ TH1520_PAD(25, GPIO2_25, GPIO, MAC1, ____, ____, ____, ____, 0),
+ TH1520_PAD(26, SDIO0_WPRTN, SDIO, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(27, SDIO0_DETN, SDIO, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(28, SDIO1_WPRTN, SDIO, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(29, SDIO1_DETN, SDIO, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(30, GPIO2_30, GPIO, MAC1, ____, ____, ____, ____, 0),
+ TH1520_PAD(31, GPIO2_31, GPIO, MAC1, ____, ____, ____, ____, 0),
+ TH1520_PAD(32, GPIO3_0, GPIO, MAC1, ____, ____, ____, ____, 0),
+ TH1520_PAD(33, GPIO3_1, GPIO, MAC1, ____, ____, ____, ____, 0),
+ TH1520_PAD(34, GPIO3_2, GPIO, PWM, ____, ____, ____, ____, 0),
+ TH1520_PAD(35, GPIO3_3, GPIO, PWM, ____, ____, ____, ____, 0),
+ TH1520_PAD(36, HDMI_SCL, HDMI, PWM, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(37, HDMI_SDA, HDMI, PWM, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(38, HDMI_CEC, HDMI, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(39, GMAC0_TX_CLK, MAC0, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(40, GMAC0_RX_CLK, MAC0, ____, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(41, GMAC0_TXEN, MAC0, UART, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(42, GMAC0_TXD0, MAC0, UART, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(43, GMAC0_TXD1, MAC0, UART, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(44, GMAC0_TXD2, MAC0, UART, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(45, GMAC0_TXD3, MAC0, I2C, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(46, GMAC0_RXDV, MAC0, I2C, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(47, GMAC0_RXD0, MAC0, I2C, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(48, GMAC0_RXD1, MAC0, I2C, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(49, GMAC0_RXD2, MAC0, SPI, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(50, GMAC0_RXD3, MAC0, SPI, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(51, GMAC0_MDC, MAC0, SPI, MAC1, GPIO, ____, ____, 0),
+ TH1520_PAD(52, GMAC0_MDIO, MAC0, SPI, MAC1, GPIO, ____, ____, 0),
+ TH1520_PAD(53, GMAC0_COL, MAC0, PWM, ____, GPIO, ____, ____, 0),
+ TH1520_PAD(54, GMAC0_CRS, MAC0, PWM, ____, GPIO, ____, ____, 0),
+};
+
+static const struct th1520_pad_group th1520_group1 = {
+ .name = "th1520-group1",
+ .pins = th1520_group1_pins,
+ .npins = ARRAY_SIZE(th1520_group1_pins),
+};
+
+static const struct th1520_pad_group th1520_group2 = {
+ .name = "th1520-group2",
+ .pins = th1520_group2_pins,
+ .npins = ARRAY_SIZE(th1520_group2_pins),
+};
+
+static const struct th1520_pad_group th1520_group3 = {
+ .name = "th1520-group3",
+ .pins = th1520_group3_pins,
+ .npins = ARRAY_SIZE(th1520_group3_pins),
+};
+
+static int th1520_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
+{
+ struct th1520_pinctrl *thp = pinctrl_dev_get_drvdata(pctldev);
+
+ return thp->desc.npins;
+}
+
+static const char *th1520_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
+ unsigned int gsel)
+{
+ struct th1520_pinctrl *thp = pinctrl_dev_get_drvdata(pctldev);
+
+ return thp->desc.pins[gsel].name;
+}
+
+static int th1520_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
+ unsigned int gsel,
+ const unsigned int **pins,
+ unsigned int *npins)
+{
+ struct th1520_pinctrl *thp = pinctrl_dev_get_drvdata(pctldev);
+
+ *pins = &thp->desc.pins[gsel].number;
+ *npins = 1;
+ return 0;
+}
+
+#ifdef CONFIG_DEBUG_FS
+static void th1520_pin_dbg_show(struct pinctrl_dev *pctldev,
+ struct seq_file *s, unsigned int pin)
+{
+ struct th1520_pinctrl *thp = pinctrl_dev_get_drvdata(pctldev);
+ void __iomem *padcfg = th1520_padcfg(thp, pin);
+ void __iomem *muxcfg = th1520_muxcfg(thp, pin);
+ u32 pad;
+ u32 mux;
+
+ scoped_guard(raw_spinlock_irqsave, &thp->lock) {
+ pad = readl_relaxed(padcfg);
+ mux = readl_relaxed(muxcfg);
+ }
+
+ seq_printf(s, "[PADCFG_%03u:0x%x=0x%07x MUXCFG_%03u:0x%x=0x%08x]",
+ 1 + pin / 2, 0x000 + 4 * (pin / 2), pad,
+ 1 + pin / 8, 0x400 + 4 * (pin / 8), mux);
+}
+#else
+#define th1520_pin_dbg_show NULL
+#endif
+
+static void th1520_pinctrl_dt_free_map(struct pinctrl_dev *pctldev,
+ struct pinctrl_map *map, unsigned int nmaps)
+{
+ unsigned long *seen = NULL;
+ unsigned int i;
+
+ for (i = 0; i < nmaps; i++) {
+ if (map[i].type == PIN_MAP_TYPE_CONFIGS_PIN &&
+ map[i].data.configs.configs != seen) {
+ seen = map[i].data.configs.configs;
+ kfree(seen);
+ }
+ }
+
+ kfree(map);
+}
+
+static int th1520_pinctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
+ struct device_node *np,
+ struct pinctrl_map **maps,
+ unsigned int *num_maps)
+{
+ struct th1520_pinctrl *thp = pinctrl_dev_get_drvdata(pctldev);
+ struct device_node *child;
+ struct pinctrl_map *map;
+ unsigned long *configs;
+ unsigned int nconfigs;
+ unsigned int nmaps;
+ int ret;
+
+ nmaps = 0;
+ for_each_available_child_of_node(np, child) {
+ int npins = of_property_count_strings(child, "pins");
+
+ if (npins <= 0) {
+ of_node_put(child);
+ dev_err(thp->pctl->dev, "no pins selected for %pOFn.%pOFn\n",
+ np, child);
+ return -EINVAL;
+ }
+ nmaps += npins;
+ if (of_property_present(child, "function"))
+ nmaps += npins;
+ }
+
+ map = kcalloc(nmaps, sizeof(*map), GFP_KERNEL);
+ if (!map)
+ return -ENOMEM;
+
+ nmaps = 0;
+ mutex_lock(&thp->mutex);
+ for_each_available_child_of_node(np, child) {
+ unsigned int rollback = nmaps;
+ enum th1520_muxtype muxtype;
+ struct property *prop;
+ const char *funcname;
+ const char **pgnames;
+ const char *pinname;
+ int npins;
+
+ ret = pinconf_generic_parse_dt_config(child, pctldev, &configs, &nconfigs);
+ if (ret) {
+ dev_err(thp->pctl->dev, "%pOFn.%pOFn: error parsing pin config\n",
+ np, child);
+ goto put_child;
+ }
+
+ if (!of_property_read_string(child, "function", &funcname)) {
+ muxtype = th1520_muxtype_get(funcname);
+ if (!muxtype) {
+ dev_err(thp->pctl->dev, "%pOFn.%pOFn: unknown function '%s'\n",
+ np, child, funcname);
+ ret = -EINVAL;
+ goto free_configs;
+ }
+
+ funcname = devm_kasprintf(thp->pctl->dev, GFP_KERNEL, "%pOFn.%pOFn",
+ np, child);
+ if (!funcname) {
+ ret = -ENOMEM;
+ goto free_configs;
+ }
+
+ npins = of_property_count_strings(child, "pins");
+ pgnames = devm_kcalloc(thp->pctl->dev, npins, sizeof(*pgnames), GFP_KERNEL);
+ if (!pgnames) {
+ ret = -ENOMEM;
+ goto free_configs;
+ }
+ } else {
+ funcname = NULL;
+ }
+
+ npins = 0;
+ of_property_for_each_string(child, "pins", prop, pinname) {
+ unsigned int i;
+
+ for (i = 0; i < thp->desc.npins; i++) {
+ if (!strcmp(pinname, thp->desc.pins[i].name))
+ break;
+ }
+ if (i == thp->desc.npins) {
+ nmaps = rollback;
+ dev_err(thp->pctl->dev, "%pOFn.%pOFn: unknown pin '%s'\n",
+ np, child, pinname);
+ goto free_configs;
+ }
+
+ if (nconfigs) {
+ map[nmaps].type = PIN_MAP_TYPE_CONFIGS_PIN;
+ map[nmaps].data.configs.group_or_pin = thp->desc.pins[i].name;
+ map[nmaps].data.configs.configs = configs;
+ map[nmaps].data.configs.num_configs = nconfigs;
+ nmaps += 1;
+ }
+ if (funcname) {
+ pgnames[npins++] = thp->desc.pins[i].name;
+ map[nmaps].type = PIN_MAP_TYPE_MUX_GROUP;
+ map[nmaps].data.mux.function = funcname;
+ map[nmaps].data.mux.group = thp->desc.pins[i].name;
+ nmaps += 1;
+ }
+ }
+
+ if (funcname) {
+ ret = pinmux_generic_add_function(pctldev, funcname, pgnames,
+ npins, (void *)muxtype);
+ if (ret < 0) {
+ dev_err(thp->pctl->dev, "error adding function %s\n", funcname);
+ goto put_child;
+ }
+ }
+ }
+
+ *maps = map;
+ *num_maps = nmaps;
+ mutex_unlock(&thp->mutex);
+ return 0;
+
+free_configs:
+ kfree(configs);
+put_child:
+ of_node_put(child);
+ th1520_pinctrl_dt_free_map(pctldev, map, nmaps);
+ mutex_unlock(&thp->mutex);
+ return ret;
+}
+
+static const struct pinctrl_ops th1520_pinctrl_ops = {
+ .get_groups_count = th1520_pinctrl_get_groups_count,
+ .get_group_name = th1520_pinctrl_get_group_name,
+ .get_group_pins = th1520_pinctrl_get_group_pins,
+ .pin_dbg_show = th1520_pin_dbg_show,
+ .dt_node_to_map = th1520_pinctrl_dt_node_to_map,
+ .dt_free_map = th1520_pinctrl_dt_free_map,
+};
+
+static const u8 th1520_drive_strength_in_ma[16] = {
+ 1, 2, 3, 5, 7, 8, 10, 12, 13, 15, 16, 18, 20, 21, 23, 25,
+};
+
+static u16 th1520_drive_strength_from_ma(u32 arg)
+{
+ u16 ds;
+
+ for (ds = 0; ds < TH1520_PADCFG_DS; ds++) {
+ if (arg <= th1520_drive_strength_in_ma[ds])
+ return ds;
+ }
+ return TH1520_PADCFG_DS;
+}
+
+static int th1520_padcfg_rmw(struct th1520_pinctrl *thp, unsigned int pin,
+ u32 mask, u32 value)
+{
+ void __iomem *padcfg = th1520_padcfg(thp, pin);
+ unsigned int shift = th1520_padcfg_shift(pin);
+ u32 tmp;
+
+ mask <<= shift;
+ value <<= shift;
+
+ scoped_guard(raw_spinlock_irqsave, &thp->lock) {
+ tmp = readl_relaxed(padcfg);
+ tmp = (tmp & ~mask) | value;
+ writel_relaxed(tmp, padcfg);
+ }
+ return 0;
+}
+
+static int th1520_pinconf_get(struct pinctrl_dev *pctldev,
+ unsigned int pin, unsigned long *config)
+{
+ struct th1520_pinctrl *thp = pinctrl_dev_get_drvdata(pctldev);
+ const struct pin_desc *desc = pin_desc_get(pctldev, pin);
+ bool enabled;
+ int param;
+ u32 value;
+ u32 arg;
+
+ if ((uintptr_t)desc->drv_data & TH1520_PAD_NO_PADCFG)
+ return -EOPNOTSUPP;
+
+ value = readl_relaxed(th1520_padcfg(thp, pin));
+ value = (value >> th1520_padcfg_shift(pin)) & GENMASK(9, 0);
+
+ param = pinconf_to_config_param(*config);
+ switch (param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ enabled = !(value & (TH1520_PADCFG_SPU | TH1520_PADCFG_PE));
+ arg = 0;
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ enabled = (value & TH1520_PADCFG_BIAS) == TH1520_PADCFG_PE;
+ arg = enabled ? TH1520_PULL_DOWN_OHM : 0;
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ if (value & TH1520_PADCFG_SPU) {
+ enabled = true;
+ arg = TH1520_PULL_STRONG_OHM;
+ } else if ((value & (TH1520_PADCFG_PE | TH1520_PADCFG_PS)) ==
+ (TH1520_PADCFG_PE | TH1520_PADCFG_PS)) {
+ enabled = true;
+ arg = TH1520_PULL_UP_OHM;
+ } else {
+ enabled = false;
+ arg = 0;
+ }
+ break;
+ case PIN_CONFIG_DRIVE_STRENGTH:
+ enabled = true;
+ arg = th1520_drive_strength_in_ma[value & TH1520_PADCFG_DS];
+ break;
+ case PIN_CONFIG_INPUT_ENABLE:
+ enabled = value & TH1520_PADCFG_IE;
+ arg = enabled ? 1 : 0;
+ break;
+ case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
+ enabled = value & TH1520_PADCFG_ST;
+ arg = enabled ? 1 : 0;
+ break;
+ case PIN_CONFIG_SLEW_RATE:
+ enabled = value & TH1520_PADCFG_SL;
+ arg = enabled ? 1 : 0;
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ *config = pinconf_to_config_packed(param, arg);
+ return enabled ? 0 : -EINVAL;
+}
+
+static int th1520_pinconf_group_get(struct pinctrl_dev *pctldev,
+ unsigned int gsel, unsigned long *config)
+{
+ struct th1520_pinctrl *thp = pinctrl_dev_get_drvdata(pctldev);
+ unsigned int pin = thp->desc.pins[gsel].number;
+
+ return th1520_pinconf_get(pctldev, pin, config);
+}
+
+static int th1520_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
+ unsigned long *configs, unsigned int num_configs)
+{
+ struct th1520_pinctrl *thp = pinctrl_dev_get_drvdata(pctldev);
+ const struct pin_desc *desc = pin_desc_get(pctldev, pin);
+ unsigned int i;
+ u16 mask, value;
+
+ if ((uintptr_t)desc->drv_data & TH1520_PAD_NO_PADCFG)
+ return -EOPNOTSUPP;
+
+ mask = 0;
+ value = 0;
+ for (i = 0; i < num_configs; i++) {
+ int param = pinconf_to_config_param(configs[i]);
+ u32 arg = pinconf_to_config_argument(configs[i]);
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ mask |= TH1520_PADCFG_BIAS;
+ value &= ~TH1520_PADCFG_BIAS;
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ if (arg == 0)
+ return -EOPNOTSUPP;
+ mask |= TH1520_PADCFG_BIAS;
+ value &= ~TH1520_PADCFG_BIAS;
+ value |= TH1520_PADCFG_PE;
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ if (arg == 0)
+ return -EOPNOTSUPP;
+ mask |= TH1520_PADCFG_BIAS;
+ value &= ~TH1520_PADCFG_BIAS;
+ if (arg == TH1520_PULL_STRONG_OHM)
+ value |= TH1520_PADCFG_SPU;
+ else
+ value |= TH1520_PADCFG_PE | TH1520_PADCFG_PS;
+ break;
+ case PIN_CONFIG_DRIVE_STRENGTH:
+ mask |= TH1520_PADCFG_DS;
+ value &= ~TH1520_PADCFG_DS;
+ value |= th1520_drive_strength_from_ma(arg);
+ break;
+ case PIN_CONFIG_INPUT_ENABLE:
+ mask |= TH1520_PADCFG_IE;
+ if (arg)
+ value |= TH1520_PADCFG_IE;
+ else
+ value &= ~TH1520_PADCFG_IE;
+ break;
+ case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
+ mask |= TH1520_PADCFG_ST;
+ if (arg)
+ value |= TH1520_PADCFG_ST;
+ else
+ value &= ~TH1520_PADCFG_ST;
+ break;
+ case PIN_CONFIG_SLEW_RATE:
+ mask |= TH1520_PADCFG_SL;
+ if (arg)
+ value |= TH1520_PADCFG_SL;
+ else
+ value &= ~TH1520_PADCFG_SL;
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+ }
+
+ return th1520_padcfg_rmw(thp, pin, mask, value);
+}
+
+static int th1520_pinconf_group_set(struct pinctrl_dev *pctldev,
+ unsigned int gsel,
+ unsigned long *configs,
+ unsigned int num_configs)
+{
+ struct th1520_pinctrl *thp = pinctrl_dev_get_drvdata(pctldev);
+ unsigned int pin = thp->desc.pins[gsel].number;
+
+ return th1520_pinconf_set(pctldev, pin, configs, num_configs);
+}
+
+#ifdef CONFIG_DEBUG_FS
+static void th1520_pinconf_dbg_show(struct pinctrl_dev *pctldev,
+ struct seq_file *s, unsigned int pin)
+{
+ struct th1520_pinctrl *thp = pinctrl_dev_get_drvdata(pctldev);
+ u32 value = readl_relaxed(th1520_padcfg(thp, pin));
+
+ value = (value >> th1520_padcfg_shift(pin)) & GENMASK(9, 0);
+
+ seq_printf(s, " [0x%03x]", value);
+}
+#else
+#define th1520_pinconf_dbg_show NULL
+#endif
+
+static const struct pinconf_ops th1520_pinconf_ops = {
+ .pin_config_get = th1520_pinconf_get,
+ .pin_config_group_get = th1520_pinconf_group_get,
+ .pin_config_set = th1520_pinconf_set,
+ .pin_config_group_set = th1520_pinconf_group_set,
+ .pin_config_dbg_show = th1520_pinconf_dbg_show,
+ .is_generic = true,
+};
+
+static int th1520_pinmux_set(struct th1520_pinctrl *thp, unsigned int pin,
+ unsigned long muxdata, enum th1520_muxtype muxtype)
+{
+ void __iomem *muxcfg = th1520_muxcfg(thp, pin);
+ unsigned int shift = th1520_muxcfg_shift(pin);
+ u32 mask, value, tmp;
+
+ for (value = 0; muxdata; muxdata >>= 5, value++) {
+ if ((muxdata & GENMASK(4, 0)) == muxtype)
+ break;
+ }
+ if (!muxdata) {
+ dev_err(thp->pctl->dev, "invalid mux %s for pin %s\n",
+ th1520_muxtype_string[muxtype], pin_get_name(thp->pctl, pin));
+ return -EINVAL;
+ }
+
+ mask = GENMASK(3, 0) << shift;
+ value = value << shift;
+
+ scoped_guard(raw_spinlock_irqsave, &thp->lock) {
+ tmp = readl_relaxed(muxcfg);
+ tmp = (tmp & ~mask) | value;
+ writel_relaxed(tmp, muxcfg);
+ }
+ return 0;
+}
+
+static int th1520_pinmux_set_mux(struct pinctrl_dev *pctldev,
+ unsigned int fsel, unsigned int gsel)
+{
+ struct th1520_pinctrl *thp = pinctrl_dev_get_drvdata(pctldev);
+ const struct function_desc *func = pinmux_generic_get_function(pctldev, fsel);
+
+ return th1520_pinmux_set(thp, thp->desc.pins[gsel].number,
+ (uintptr_t)thp->desc.pins[gsel].drv_data & TH1520_PAD_MUXDATA,
+ (uintptr_t)func->data);
+}
+
+static int th1520_gpio_request_enable(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned int offset)
+{
+ struct th1520_pinctrl *thp = pinctrl_dev_get_drvdata(pctldev);
+ const struct pin_desc *desc = pin_desc_get(pctldev, offset);
+
+ return th1520_pinmux_set(thp, offset,
+ (uintptr_t)desc->drv_data & TH1520_PAD_MUXDATA,
+ TH1520_MUX_GPIO);
+}
+
+static int th1520_gpio_set_direction(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned int offset, bool input)
+{
+ struct th1520_pinctrl *thp = pinctrl_dev_get_drvdata(pctldev);
+
+ return th1520_padcfg_rmw(thp, offset, TH1520_PADCFG_IE,
+ input ? TH1520_PADCFG_IE : 0);
+}
+
+static const struct pinmux_ops th1520_pinmux_ops = {
+ .get_functions_count = pinmux_generic_get_function_count,
+ .get_function_name = pinmux_generic_get_function_name,
+ .get_function_groups = pinmux_generic_get_function_groups,
+ .set_mux = th1520_pinmux_set_mux,
+ .gpio_request_enable = th1520_gpio_request_enable,
+ .gpio_set_direction = th1520_gpio_set_direction,
+ .strict = true,
+};
+
+static int th1520_pinctrl_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ const struct th1520_pad_group *group;
+ struct device_node *np = dev->of_node;
+ struct th1520_pinctrl *thp;
+ struct clk *clk;
+ u32 pin_group;
+ int ret;
+
+ thp = devm_kzalloc(dev, sizeof(*thp), GFP_KERNEL);
+ if (!thp)
+ return -ENOMEM;
+
+ thp->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(thp->base))
+ return PTR_ERR(thp->base);
+
+ clk = devm_clk_get_enabled(dev, NULL);
+ if (IS_ERR(clk))
+ return dev_err_probe(dev, PTR_ERR(clk), "error getting clock\n");
+
+ ret = of_property_read_u32(np, "thead,pad-group", &pin_group);
+ if (ret)
+ return dev_err_probe(dev, ret, "failed to read the thead,pad-group property\n");
+
+ if (pin_group == 1)
+ group = &th1520_group1;
+ else if (pin_group == 2)
+ group = &th1520_group2;
+ else if (pin_group == 3)
+ group = &th1520_group3;
+ else
+ return dev_err_probe(dev, -EINVAL, "unit address did not match any pad group\n");
+
+ thp->desc.name = group->name;
+ thp->desc.pins = group->pins;
+ thp->desc.npins = group->npins;
+ thp->desc.pctlops = &th1520_pinctrl_ops;
+ thp->desc.pmxops = &th1520_pinmux_ops;
+ thp->desc.confops = &th1520_pinconf_ops;
+ thp->desc.owner = THIS_MODULE;
+ mutex_init(&thp->mutex);
+ raw_spin_lock_init(&thp->lock);
+
+ ret = devm_pinctrl_register_and_init(dev, &thp->desc, thp, &thp->pctl);
+ if (ret)
+ return dev_err_probe(dev, ret, "could not register pinctrl driver\n");
+
+ return pinctrl_enable(thp->pctl);
+}
+
+static const struct of_device_id th1520_pinctrl_of_match[] = {
+ { .compatible = "thead,th1520-pinctrl"},
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, th1520_pinctrl_of_match);
+
+static struct platform_driver th1520_pinctrl_driver = {
+ .probe = th1520_pinctrl_probe,
+ .driver = {
+ .name = "pinctrl-th1520",
+ .of_match_table = th1520_pinctrl_of_match,
+ },
+};
+module_platform_driver(th1520_pinctrl_driver);
+
+MODULE_DESCRIPTION("Pinctrl driver for the T-Head TH1520 SoC");
+MODULE_AUTHOR("Emil Renner Berthing <emil.renner.berthing@canonical.com>");
+MODULE_LICENSE("GPL");
projects / linux-2.6-microblaze.git / commitdiff