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linux/drivers/pinctrl/pinctrl-k210.c
Sean Anderson e9f7b9228a pinctrl: k210: Fix bias-pull-up 
Using bias-pull-up would actually cause the pin to have its pull-down
enabled. Fix this.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Fixes: d4c34d09ab ("pinctrl: Add RISC-V Canaan Kendryte K210 FPIOA driver")
Link: https://lore.kernel.org/r/20220209182822.640905-1-seanga2@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2022-02-11 02:19:47 +01:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2020 Sean Anderson <seanga2@gmail.com>
* Copyright (c) 2020 Western Digital Corporation or its affiliates.
*/
#include <linux/io.h>
#include <linux/of_device.h>
#include <linux/clk.h>
#include <linux/mfd/syscon.h>
#include <linux/platform_device.h>
#include <linux/bitfield.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <dt-bindings/pinctrl/k210-fpioa.h>
#include "core.h"
#include "pinconf.h"
#include "pinctrl-utils.h"
/*
* The K210 only implements 8 drive levels, even though
* there is register space for 16
*/
#define K210_PC_DRIVE_MASK GENMASK(11, 8)
#define K210_PC_DRIVE_SHIFT 8
#define K210_PC_DRIVE_0 (0 << K210_PC_DRIVE_SHIFT)
#define K210_PC_DRIVE_1 (1 << K210_PC_DRIVE_SHIFT)
#define K210_PC_DRIVE_2 (2 << K210_PC_DRIVE_SHIFT)
#define K210_PC_DRIVE_3 (3 << K210_PC_DRIVE_SHIFT)
#define K210_PC_DRIVE_4 (4 << K210_PC_DRIVE_SHIFT)
#define K210_PC_DRIVE_5 (5 << K210_PC_DRIVE_SHIFT)
#define K210_PC_DRIVE_6 (6 << K210_PC_DRIVE_SHIFT)
#define K210_PC_DRIVE_7 (7 << K210_PC_DRIVE_SHIFT)
#define K210_PC_DRIVE_MAX 7
#define K210_PC_MODE_MASK GENMASK(23, 12)
/*
* output enabled == PC_OE & (PC_OE_INV ^ FUNCTION_OE)
* where FUNCTION_OE is a physical signal from the function.
*/
#define K210_PC_OE BIT(12) /* Output Enable */
#define K210_PC_OE_INV BIT(13) /* INVert Output Enable */
#define K210_PC_DO_OE BIT(14) /* set Data Out to Output Enable sig */
#define K210_PC_DO_INV BIT(15) /* INVert final Data Output */
#define K210_PC_PU BIT(16) /* Pull Up */
#define K210_PC_PD BIT(17) /* Pull Down */
/* Strong pull up not implemented on K210 */
#define K210_PC_SL BIT(19) /* reduce SLew rate */
/* Same semantics as OE above */
#define K210_PC_IE BIT(20) /* Input Enable */
#define K210_PC_IE_INV BIT(21) /* INVert Input Enable */
#define K210_PC_DI_INV BIT(22) /* INVert Data Input */
#define K210_PC_ST BIT(23) /* Schmitt Trigger */
#define K210_PC_DI BIT(31) /* raw Data Input */
#define K210_PC_BIAS_MASK (K210_PC_PU & K210_PC_PD)
#define K210_PC_MODE_IN (K210_PC_IE | K210_PC_ST)
#define K210_PC_MODE_OUT (K210_PC_DRIVE_7 | K210_PC_OE)
#define K210_PC_MODE_I2C (K210_PC_MODE_IN | K210_PC_SL | \
K210_PC_OE | K210_PC_PU)
#define K210_PC_MODE_SCCB (K210_PC_MODE_I2C | \
K210_PC_OE_INV | K210_PC_IE_INV)
#define K210_PC_MODE_SPI (K210_PC_MODE_IN | K210_PC_IE_INV | \
K210_PC_MODE_OUT | K210_PC_OE_INV)
#define K210_PC_MODE_GPIO (K210_PC_MODE_IN | K210_PC_MODE_OUT)
#define K210_PG_FUNC GENMASK(7, 0)
#define K210_PG_DO BIT(8)
#define K210_PG_PIN GENMASK(22, 16)
/*
* struct k210_fpioa: Kendryte K210 FPIOA memory mapped registers
* @pins: 48 32-bits IO pin registers
* @tie_en: 256 (one per function) input tie enable bits
* @tie_val: 256 (one per function) input tie value bits
*/
struct k210_fpioa {
u32 pins[48];
u32 tie_en[8];
u32 tie_val[8];
};
struct k210_fpioa_data {
struct device *dev;
struct pinctrl_dev *pctl;
struct k210_fpioa __iomem *fpioa;
struct regmap *sysctl_map;
u32 power_offset;
struct clk *clk;
struct clk *pclk;
};
#define K210_PIN_NAME(i) ("IO_" #i)
#define K210_PIN(i) [(i)] = PINCTRL_PIN((i), K210_PIN_NAME(i))
static const struct pinctrl_pin_desc k210_pins[] = {
K210_PIN(0), K210_PIN(1), K210_PIN(2),
K210_PIN(3), K210_PIN(4), K210_PIN(5),
K210_PIN(6), K210_PIN(7), K210_PIN(8),
K210_PIN(9), K210_PIN(10), K210_PIN(11),
K210_PIN(12), K210_PIN(13), K210_PIN(14),
K210_PIN(15), K210_PIN(16), K210_PIN(17),
K210_PIN(18), K210_PIN(19), K210_PIN(20),
K210_PIN(21), K210_PIN(22), K210_PIN(23),
K210_PIN(24), K210_PIN(25), K210_PIN(26),
K210_PIN(27), K210_PIN(28), K210_PIN(29),
K210_PIN(30), K210_PIN(31), K210_PIN(32),
K210_PIN(33), K210_PIN(34), K210_PIN(35),
K210_PIN(36), K210_PIN(37), K210_PIN(38),
K210_PIN(39), K210_PIN(40), K210_PIN(41),
K210_PIN(42), K210_PIN(43), K210_PIN(44),
K210_PIN(45), K210_PIN(46), K210_PIN(47)
};
#define K210_NPINS ARRAY_SIZE(k210_pins)
/*
* Pin groups: each of the 48 programmable pins is a group.
* To this are added 8 power domain groups, which for the purposes of
* the pin subsystem, contain no pins. The power domain groups only exist
* to set the power level. The id should never be used (since there are
* no pins 48-55).
*/
static const char *const k210_group_names[] = {
/* The first 48 groups are for pins, one each */
K210_PIN_NAME(0), K210_PIN_NAME(1), K210_PIN_NAME(2),
K210_PIN_NAME(3), K210_PIN_NAME(4), K210_PIN_NAME(5),
K210_PIN_NAME(6), K210_PIN_NAME(7), K210_PIN_NAME(8),
K210_PIN_NAME(9), K210_PIN_NAME(10), K210_PIN_NAME(11),
K210_PIN_NAME(12), K210_PIN_NAME(13), K210_PIN_NAME(14),
K210_PIN_NAME(15), K210_PIN_NAME(16), K210_PIN_NAME(17),
K210_PIN_NAME(18), K210_PIN_NAME(19), K210_PIN_NAME(20),
K210_PIN_NAME(21), K210_PIN_NAME(22), K210_PIN_NAME(23),
K210_PIN_NAME(24), K210_PIN_NAME(25), K210_PIN_NAME(26),
K210_PIN_NAME(27), K210_PIN_NAME(28), K210_PIN_NAME(29),
K210_PIN_NAME(30), K210_PIN_NAME(31), K210_PIN_NAME(32),
K210_PIN_NAME(33), K210_PIN_NAME(34), K210_PIN_NAME(35),
K210_PIN_NAME(36), K210_PIN_NAME(37), K210_PIN_NAME(38),
K210_PIN_NAME(39), K210_PIN_NAME(40), K210_PIN_NAME(41),
K210_PIN_NAME(42), K210_PIN_NAME(43), K210_PIN_NAME(44),
K210_PIN_NAME(45), K210_PIN_NAME(46), K210_PIN_NAME(47),
[48] = "A0", [49] = "A1", [50] = "A2",
[51] = "B3", [52] = "B4", [53] = "B5",
[54] = "C6", [55] = "C7"
};
#define K210_NGROUPS ARRAY_SIZE(k210_group_names)
enum k210_pinctrl_mode_id {
K210_PC_DEFAULT_DISABLED,
K210_PC_DEFAULT_IN,
K210_PC_DEFAULT_IN_TIE,
K210_PC_DEFAULT_OUT,
K210_PC_DEFAULT_I2C,
K210_PC_DEFAULT_SCCB,
K210_PC_DEFAULT_SPI,
K210_PC_DEFAULT_GPIO,
K210_PC_DEFAULT_INT13,
};
#define K210_PC_DEFAULT(mode) \
[K210_PC_DEFAULT_##mode] = K210_PC_MODE_##mode
static const u32 k210_pinconf_mode_id_to_mode[] = {
[K210_PC_DEFAULT_DISABLED] = 0,
K210_PC_DEFAULT(IN),
[K210_PC_DEFAULT_IN_TIE] = K210_PC_MODE_IN,
K210_PC_DEFAULT(OUT),
K210_PC_DEFAULT(I2C),
K210_PC_DEFAULT(SCCB),
K210_PC_DEFAULT(SPI),
K210_PC_DEFAULT(GPIO),
[K210_PC_DEFAULT_INT13] = K210_PC_MODE_IN | K210_PC_PU,
};
#undef DEFAULT
/*
* Pin functions configuration information.
*/
struct k210_pcf_info {
char name[15];
u8 mode_id;
};
#define K210_FUNC(id, mode) \
[K210_PCF_##id] = { \
.name = #id, \
.mode_id = K210_PC_DEFAULT_##mode \
}
static const struct k210_pcf_info k210_pcf_infos[] = {
K210_FUNC(JTAG_TCLK, IN),
K210_FUNC(JTAG_TDI, IN),
K210_FUNC(JTAG_TMS, IN),
K210_FUNC(JTAG_TDO, OUT),
K210_FUNC(SPI0_D0, SPI),
K210_FUNC(SPI0_D1, SPI),
K210_FUNC(SPI0_D2, SPI),
K210_FUNC(SPI0_D3, SPI),
K210_FUNC(SPI0_D4, SPI),
K210_FUNC(SPI0_D5, SPI),
K210_FUNC(SPI0_D6, SPI),
K210_FUNC(SPI0_D7, SPI),
K210_FUNC(SPI0_SS0, OUT),
K210_FUNC(SPI0_SS1, OUT),
K210_FUNC(SPI0_SS2, OUT),
K210_FUNC(SPI0_SS3, OUT),
K210_FUNC(SPI0_ARB, IN_TIE),
K210_FUNC(SPI0_SCLK, OUT),
K210_FUNC(UARTHS_RX, IN),
K210_FUNC(UARTHS_TX, OUT),
K210_FUNC(RESV6, IN),
K210_FUNC(RESV7, IN),
K210_FUNC(CLK_SPI1, OUT),
K210_FUNC(CLK_I2C1, OUT),
K210_FUNC(GPIOHS0, GPIO),
K210_FUNC(GPIOHS1, GPIO),
K210_FUNC(GPIOHS2, GPIO),
K210_FUNC(GPIOHS3, GPIO),
K210_FUNC(GPIOHS4, GPIO),
K210_FUNC(GPIOHS5, GPIO),
K210_FUNC(GPIOHS6, GPIO),
K210_FUNC(GPIOHS7, GPIO),
K210_FUNC(GPIOHS8, GPIO),
K210_FUNC(GPIOHS9, GPIO),
K210_FUNC(GPIOHS10, GPIO),
K210_FUNC(GPIOHS11, GPIO),
K210_FUNC(GPIOHS12, GPIO),
K210_FUNC(GPIOHS13, GPIO),
K210_FUNC(GPIOHS14, GPIO),
K210_FUNC(GPIOHS15, GPIO),
K210_FUNC(GPIOHS16, GPIO),
K210_FUNC(GPIOHS17, GPIO),
K210_FUNC(GPIOHS18, GPIO),
K210_FUNC(GPIOHS19, GPIO),
K210_FUNC(GPIOHS20, GPIO),
K210_FUNC(GPIOHS21, GPIO),
K210_FUNC(GPIOHS22, GPIO),
K210_FUNC(GPIOHS23, GPIO),
K210_FUNC(GPIOHS24, GPIO),
K210_FUNC(GPIOHS25, GPIO),
K210_FUNC(GPIOHS26, GPIO),
K210_FUNC(GPIOHS27, GPIO),
K210_FUNC(GPIOHS28, GPIO),
K210_FUNC(GPIOHS29, GPIO),
K210_FUNC(GPIOHS30, GPIO),
K210_FUNC(GPIOHS31, GPIO),
K210_FUNC(GPIO0, GPIO),
K210_FUNC(GPIO1, GPIO),
K210_FUNC(GPIO2, GPIO),
K210_FUNC(GPIO3, GPIO),
K210_FUNC(GPIO4, GPIO),
K210_FUNC(GPIO5, GPIO),
K210_FUNC(GPIO6, GPIO),
K210_FUNC(GPIO7, GPIO),
K210_FUNC(UART1_RX, IN),
K210_FUNC(UART1_TX, OUT),
K210_FUNC(UART2_RX, IN),
K210_FUNC(UART2_TX, OUT),
K210_FUNC(UART3_RX, IN),
K210_FUNC(UART3_TX, OUT),
K210_FUNC(SPI1_D0, SPI),
K210_FUNC(SPI1_D1, SPI),
K210_FUNC(SPI1_D2, SPI),
K210_FUNC(SPI1_D3, SPI),
K210_FUNC(SPI1_D4, SPI),
K210_FUNC(SPI1_D5, SPI),
K210_FUNC(SPI1_D6, SPI),
K210_FUNC(SPI1_D7, SPI),
K210_FUNC(SPI1_SS0, OUT),
K210_FUNC(SPI1_SS1, OUT),
K210_FUNC(SPI1_SS2, OUT),
K210_FUNC(SPI1_SS3, OUT),
K210_FUNC(SPI1_ARB, IN_TIE),
K210_FUNC(SPI1_SCLK, OUT),
K210_FUNC(SPI2_D0, SPI),
K210_FUNC(SPI2_SS, IN),
K210_FUNC(SPI2_SCLK, IN),
K210_FUNC(I2S0_MCLK, OUT),
K210_FUNC(I2S0_SCLK, OUT),
K210_FUNC(I2S0_WS, OUT),
K210_FUNC(I2S0_IN_D0, IN),
K210_FUNC(I2S0_IN_D1, IN),
K210_FUNC(I2S0_IN_D2, IN),
K210_FUNC(I2S0_IN_D3, IN),
K210_FUNC(I2S0_OUT_D0, OUT),
K210_FUNC(I2S0_OUT_D1, OUT),
K210_FUNC(I2S0_OUT_D2, OUT),
K210_FUNC(I2S0_OUT_D3, OUT),
K210_FUNC(I2S1_MCLK, OUT),
K210_FUNC(I2S1_SCLK, OUT),
K210_FUNC(I2S1_WS, OUT),
K210_FUNC(I2S1_IN_D0, IN),
K210_FUNC(I2S1_IN_D1, IN),
K210_FUNC(I2S1_IN_D2, IN),
K210_FUNC(I2S1_IN_D3, IN),
K210_FUNC(I2S1_OUT_D0, OUT),
K210_FUNC(I2S1_OUT_D1, OUT),
K210_FUNC(I2S1_OUT_D2, OUT),
K210_FUNC(I2S1_OUT_D3, OUT),
K210_FUNC(I2S2_MCLK, OUT),
K210_FUNC(I2S2_SCLK, OUT),
K210_FUNC(I2S2_WS, OUT),
K210_FUNC(I2S2_IN_D0, IN),
K210_FUNC(I2S2_IN_D1, IN),
K210_FUNC(I2S2_IN_D2, IN),
K210_FUNC(I2S2_IN_D3, IN),
K210_FUNC(I2S2_OUT_D0, OUT),
K210_FUNC(I2S2_OUT_D1, OUT),
K210_FUNC(I2S2_OUT_D2, OUT),
K210_FUNC(I2S2_OUT_D3, OUT),
K210_FUNC(RESV0, DISABLED),
K210_FUNC(RESV1, DISABLED),
K210_FUNC(RESV2, DISABLED),
K210_FUNC(RESV3, DISABLED),
K210_FUNC(RESV4, DISABLED),
K210_FUNC(RESV5, DISABLED),
K210_FUNC(I2C0_SCLK, I2C),
K210_FUNC(I2C0_SDA, I2C),
K210_FUNC(I2C1_SCLK, I2C),
K210_FUNC(I2C1_SDA, I2C),
K210_FUNC(I2C2_SCLK, I2C),
K210_FUNC(I2C2_SDA, I2C),
K210_FUNC(DVP_XCLK, OUT),
K210_FUNC(DVP_RST, OUT),
K210_FUNC(DVP_PWDN, OUT),
K210_FUNC(DVP_VSYNC, IN),
K210_FUNC(DVP_HSYNC, IN),
K210_FUNC(DVP_PCLK, IN),
K210_FUNC(DVP_D0, IN),
K210_FUNC(DVP_D1, IN),
K210_FUNC(DVP_D2, IN),
K210_FUNC(DVP_D3, IN),
K210_FUNC(DVP_D4, IN),
K210_FUNC(DVP_D5, IN),
K210_FUNC(DVP_D6, IN),
K210_FUNC(DVP_D7, IN),
K210_FUNC(SCCB_SCLK, SCCB),
K210_FUNC(SCCB_SDA, SCCB),
K210_FUNC(UART1_CTS, IN),
K210_FUNC(UART1_DSR, IN),
K210_FUNC(UART1_DCD, IN),
K210_FUNC(UART1_RI, IN),
K210_FUNC(UART1_SIR_IN, IN),
K210_FUNC(UART1_DTR, OUT),
K210_FUNC(UART1_RTS, OUT),
K210_FUNC(UART1_OUT2, OUT),
K210_FUNC(UART1_OUT1, OUT),
K210_FUNC(UART1_SIR_OUT, OUT),
K210_FUNC(UART1_BAUD, OUT),
K210_FUNC(UART1_RE, OUT),
K210_FUNC(UART1_DE, OUT),
K210_FUNC(UART1_RS485_EN, OUT),
K210_FUNC(UART2_CTS, IN),
K210_FUNC(UART2_DSR, IN),
K210_FUNC(UART2_DCD, IN),
K210_FUNC(UART2_RI, IN),
K210_FUNC(UART2_SIR_IN, IN),
K210_FUNC(UART2_DTR, OUT),
K210_FUNC(UART2_RTS, OUT),
K210_FUNC(UART2_OUT2, OUT),
K210_FUNC(UART2_OUT1, OUT),
K210_FUNC(UART2_SIR_OUT, OUT),
K210_FUNC(UART2_BAUD, OUT),
K210_FUNC(UART2_RE, OUT),
K210_FUNC(UART2_DE, OUT),
K210_FUNC(UART2_RS485_EN, OUT),
K210_FUNC(UART3_CTS, IN),
K210_FUNC(UART3_DSR, IN),
K210_FUNC(UART3_DCD, IN),
K210_FUNC(UART3_RI, IN),
K210_FUNC(UART3_SIR_IN, IN),
K210_FUNC(UART3_DTR, OUT),
K210_FUNC(UART3_RTS, OUT),
K210_FUNC(UART3_OUT2, OUT),
K210_FUNC(UART3_OUT1, OUT),
K210_FUNC(UART3_SIR_OUT, OUT),
K210_FUNC(UART3_BAUD, OUT),
K210_FUNC(UART3_RE, OUT),
K210_FUNC(UART3_DE, OUT),
K210_FUNC(UART3_RS485_EN, OUT),
K210_FUNC(TIMER0_TOGGLE1, OUT),
K210_FUNC(TIMER0_TOGGLE2, OUT),
K210_FUNC(TIMER0_TOGGLE3, OUT),
K210_FUNC(TIMER0_TOGGLE4, OUT),
K210_FUNC(TIMER1_TOGGLE1, OUT),
K210_FUNC(TIMER1_TOGGLE2, OUT),
K210_FUNC(TIMER1_TOGGLE3, OUT),
K210_FUNC(TIMER1_TOGGLE4, OUT),
K210_FUNC(TIMER2_TOGGLE1, OUT),
K210_FUNC(TIMER2_TOGGLE2, OUT),
K210_FUNC(TIMER2_TOGGLE3, OUT),
K210_FUNC(TIMER2_TOGGLE4, OUT),
K210_FUNC(CLK_SPI2, OUT),
K210_FUNC(CLK_I2C2, OUT),
K210_FUNC(INTERNAL0, OUT),
K210_FUNC(INTERNAL1, OUT),
K210_FUNC(INTERNAL2, OUT),
K210_FUNC(INTERNAL3, OUT),
K210_FUNC(INTERNAL4, OUT),
K210_FUNC(INTERNAL5, OUT),
K210_FUNC(INTERNAL6, OUT),
K210_FUNC(INTERNAL7, OUT),
K210_FUNC(INTERNAL8, OUT),
K210_FUNC(INTERNAL9, IN),
K210_FUNC(INTERNAL10, IN),
K210_FUNC(INTERNAL11, IN),
K210_FUNC(INTERNAL12, IN),
K210_FUNC(INTERNAL13, INT13),
K210_FUNC(INTERNAL14, I2C),
K210_FUNC(INTERNAL15, IN),
K210_FUNC(INTERNAL16, IN),
K210_FUNC(INTERNAL17, IN),
K210_FUNC(CONSTANT, DISABLED),
K210_FUNC(INTERNAL18, IN),
K210_FUNC(DEBUG0, OUT),
K210_FUNC(DEBUG1, OUT),
K210_FUNC(DEBUG2, OUT),
K210_FUNC(DEBUG3, OUT),
K210_FUNC(DEBUG4, OUT),
K210_FUNC(DEBUG5, OUT),
K210_FUNC(DEBUG6, OUT),
K210_FUNC(DEBUG7, OUT),
K210_FUNC(DEBUG8, OUT),
K210_FUNC(DEBUG9, OUT),
K210_FUNC(DEBUG10, OUT),
K210_FUNC(DEBUG11, OUT),
K210_FUNC(DEBUG12, OUT),
K210_FUNC(DEBUG13, OUT),
K210_FUNC(DEBUG14, OUT),
K210_FUNC(DEBUG15, OUT),
K210_FUNC(DEBUG16, OUT),
K210_FUNC(DEBUG17, OUT),
K210_FUNC(DEBUG18, OUT),
K210_FUNC(DEBUG19, OUT),
K210_FUNC(DEBUG20, OUT),
K210_FUNC(DEBUG21, OUT),
K210_FUNC(DEBUG22, OUT),
K210_FUNC(DEBUG23, OUT),
K210_FUNC(DEBUG24, OUT),
K210_FUNC(DEBUG25, OUT),
K210_FUNC(DEBUG26, OUT),
K210_FUNC(DEBUG27, OUT),
K210_FUNC(DEBUG28, OUT),
K210_FUNC(DEBUG29, OUT),
K210_FUNC(DEBUG30, OUT),
K210_FUNC(DEBUG31, OUT),
};
#define PIN_CONFIG_OUTPUT_INVERT (PIN_CONFIG_END + 1)
#define PIN_CONFIG_INPUT_INVERT (PIN_CONFIG_END + 2)
static const struct pinconf_generic_params k210_pinconf_custom_params[] = {
{ "output-polarity-invert", PIN_CONFIG_OUTPUT_INVERT, 1 },
{ "input-polarity-invert", PIN_CONFIG_INPUT_INVERT, 1 },
};
/*
* Max drive strength in uA.
*/
static const int k210_pinconf_drive_strength[] = {
[0] = 11200,
[1] = 16800,
[2] = 22300,
[3] = 27800,
[4] = 33300,
[5] = 38700,
[6] = 44100,
[7] = 49500,
};
static int k210_pinconf_get_drive(unsigned int max_strength_ua)
{
int i;
for (i = K210_PC_DRIVE_MAX; i >= 0; i--) {
if (k210_pinconf_drive_strength[i] <= max_strength_ua)
return i;
}
return -EINVAL;
}
static void k210_pinmux_set_pin_function(struct pinctrl_dev *pctldev,
u32 pin, u32 func)
{
struct k210_fpioa_data *pdata = pinctrl_dev_get_drvdata(pctldev);
const struct k210_pcf_info *info = &k210_pcf_infos[func];
u32 mode = k210_pinconf_mode_id_to_mode[info->mode_id];
u32 val = func | mode;
dev_dbg(pdata->dev, "set pin %u function %s (%u) -> 0x%08x\n",
pin, info->name, func, val);
writel(val, &pdata->fpioa->pins[pin]);
}
static int k210_pinconf_set_param(struct pinctrl_dev *pctldev,
unsigned int pin,
unsigned int param, unsigned int arg)
{
struct k210_fpioa_data *pdata = pinctrl_dev_get_drvdata(pctldev);
u32 val = readl(&pdata->fpioa->pins[pin]);
int drive;
dev_dbg(pdata->dev, "set pin %u param %u, arg 0x%x\n",
pin, param, arg);
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
val &= ~K210_PC_BIAS_MASK;
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
if (!arg)
return -EINVAL;
val |= K210_PC_PD;
break;
case PIN_CONFIG_BIAS_PULL_UP:
if (!arg)
return -EINVAL;
val |= K210_PC_PU;
break;
case PIN_CONFIG_DRIVE_STRENGTH:
arg *= 1000;
fallthrough;
case PIN_CONFIG_DRIVE_STRENGTH_UA:
drive = k210_pinconf_get_drive(arg);
if (drive < 0)
return drive;
val &= ~K210_PC_DRIVE_MASK;
val |= FIELD_PREP(K210_PC_DRIVE_MASK, drive);
break;
case PIN_CONFIG_INPUT_ENABLE:
if (arg)
val |= K210_PC_IE;
else
val &= ~K210_PC_IE;
break;
case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
if (arg)
val |= K210_PC_ST;
else
val &= ~K210_PC_ST;
break;
case PIN_CONFIG_OUTPUT:
k210_pinmux_set_pin_function(pctldev, pin, K210_PCF_CONSTANT);
val = readl(&pdata->fpioa->pins[pin]);
val |= K210_PC_MODE_OUT;
if (!arg)
val |= K210_PC_DO_INV;
break;
case PIN_CONFIG_OUTPUT_ENABLE:
if (arg)
val |= K210_PC_OE;
else
val &= ~K210_PC_OE;
break;
case PIN_CONFIG_SLEW_RATE:
if (arg)
val |= K210_PC_SL;
else
val &= ~K210_PC_SL;
break;
case PIN_CONFIG_OUTPUT_INVERT:
if (arg)
val |= K210_PC_DO_INV;
else
val &= ~K210_PC_DO_INV;
break;
case PIN_CONFIG_INPUT_INVERT:
if (arg)
val |= K210_PC_DI_INV;
else
val &= ~K210_PC_DI_INV;
break;
default:
return -EINVAL;
}
writel(val, &pdata->fpioa->pins[pin]);
return 0;
}
static int k210_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
unsigned long *configs, unsigned int num_configs)
{
unsigned int param, arg;
int i, ret;
if (WARN_ON(pin >= K210_NPINS))
return -EINVAL;
for (i = 0; i < num_configs; i++) {
param = pinconf_to_config_param(configs[i]);
arg = pinconf_to_config_argument(configs[i]);
ret = k210_pinconf_set_param(pctldev, pin, param, arg);
if (ret)
return ret;
}
return 0;
}
static void k210_pinconf_dbg_show(struct pinctrl_dev *pctldev,
struct seq_file *s, unsigned int pin)
{
struct k210_fpioa_data *pdata = pinctrl_dev_get_drvdata(pctldev);
seq_printf(s, "%#x", readl(&pdata->fpioa->pins[pin]));
}
static int k210_pinconf_group_set(struct pinctrl_dev *pctldev,
unsigned int selector, unsigned long *configs,
unsigned int num_configs)
{
struct k210_fpioa_data *pdata = pinctrl_dev_get_drvdata(pctldev);
unsigned int param, arg;
u32 bit;
int i;
/* Pins should be configured with pinmux, not groups*/
if (selector < K210_NPINS)
return -EINVAL;
/* Otherwise it's a power domain */
for (i = 0; i < num_configs; i++) {
param = pinconf_to_config_param(configs[i]);
if (param != PIN_CONFIG_POWER_SOURCE)
return -EINVAL;
arg = pinconf_to_config_argument(configs[i]);
bit = BIT(selector - K210_NPINS);
regmap_update_bits(pdata->sysctl_map,
pdata->power_offset,
bit, arg ? bit : 0);
}
return 0;
}
static void k210_pinconf_group_dbg_show(struct pinctrl_dev *pctldev,
struct seq_file *s,
unsigned int selector)
{
struct k210_fpioa_data *pdata = pinctrl_dev_get_drvdata(pctldev);
int ret;
u32 val;
if (selector < K210_NPINS)
return k210_pinconf_dbg_show(pctldev, s, selector);
ret = regmap_read(pdata->sysctl_map, pdata->power_offset, &val);
if (ret) {
dev_err(pdata->dev, "Failed to read power reg\n");
return;
}
seq_printf(s, "%s: %s V", k210_group_names[selector],
val & BIT(selector - K210_NPINS) ? "1.8" : "3.3");
}
static const struct pinconf_ops k210_pinconf_ops = {
.is_generic = true,
.pin_config_set = k210_pinconf_set,
.pin_config_group_set = k210_pinconf_group_set,
.pin_config_dbg_show = k210_pinconf_dbg_show,
.pin_config_group_dbg_show = k210_pinconf_group_dbg_show,
};
static int k210_pinmux_get_function_count(struct pinctrl_dev *pctldev)
{
return ARRAY_SIZE(k210_pcf_infos);
}
static const char *k210_pinmux_get_function_name(struct pinctrl_dev *pctldev,
unsigned int selector)
{
return k210_pcf_infos[selector].name;
}
static int k210_pinmux_get_function_groups(struct pinctrl_dev *pctldev,
unsigned int selector,
const char * const **groups,
unsigned int * const num_groups)
{
/* Any function can be mapped to any pin */
*groups = k210_group_names;
*num_groups = K210_NPINS;
return 0;
}
static int k210_pinmux_set_mux(struct pinctrl_dev *pctldev,
unsigned int function,
unsigned int group)
{
/* Can't mux power domains */
if (group >= K210_NPINS)
return -EINVAL;
k210_pinmux_set_pin_function(pctldev, group, function);
return 0;
}
static const struct pinmux_ops k210_pinmux_ops = {
.get_functions_count = k210_pinmux_get_function_count,
.get_function_name = k210_pinmux_get_function_name,
.get_function_groups = k210_pinmux_get_function_groups,
.set_mux = k210_pinmux_set_mux,
.strict = true,
};
static int k210_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
{
return K210_NGROUPS;
}
static const char *k210_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
unsigned int group)
{
return k210_group_names[group];
}
static int k210_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
unsigned int group,
const unsigned int **pins,
unsigned int *npins)
{
if (group >= K210_NPINS) {
*pins = NULL;
*npins = 0;
return 0;
}
*pins = &k210_pins[group].number;
*npins = 1;
return 0;
}
static void k210_pinctrl_pin_dbg_show(struct pinctrl_dev *pctldev,
struct seq_file *s, unsigned int offset)
{
seq_printf(s, "%s", dev_name(pctldev->dev));
}
static int k210_pinctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
struct device_node *np,
struct pinctrl_map **map,
unsigned int *reserved_maps,
unsigned int *num_maps)
{
struct property *prop;
const __be32 *p;
int ret, pinmux_groups;
u32 pinmux_group;
unsigned long *configs = NULL;
unsigned int num_configs = 0;
unsigned int reserve = 0;
ret = of_property_count_strings(np, "groups");
if (!ret)
return pinconf_generic_dt_subnode_to_map(pctldev, np, map,
reserved_maps, num_maps,
PIN_MAP_TYPE_CONFIGS_GROUP);
pinmux_groups = of_property_count_u32_elems(np, "pinmux");
if (pinmux_groups <= 0) {
/* Ignore this node */
return 0;
}
ret = pinconf_generic_parse_dt_config(np, pctldev, &configs,
&num_configs);
if (ret < 0) {
dev_err(pctldev->dev, "%pOF: could not parse node property\n",
np);
return ret;
}
reserve = pinmux_groups * (1 + num_configs);
ret = pinctrl_utils_reserve_map(pctldev, map, reserved_maps, num_maps,
reserve);
if (ret < 0)
goto exit;
of_property_for_each_u32(np, "pinmux", prop, p, pinmux_group) {
const char *group_name, *func_name;
u32 pin = FIELD_GET(K210_PG_PIN, pinmux_group);
u32 func = FIELD_GET(K210_PG_FUNC, pinmux_group);
if (pin >= K210_NPINS) {
ret = -EINVAL;
goto exit;
}
group_name = k210_group_names[pin];
func_name = k210_pcf_infos[func].name;
dev_dbg(pctldev->dev, "Pinmux %s: pin %u func %s\n",
np->name, pin, func_name);
ret = pinctrl_utils_add_map_mux(pctldev, map, reserved_maps,
num_maps, group_name,
func_name);
if (ret < 0) {
dev_err(pctldev->dev, "%pOF add mux map failed %d\n",
np, ret);
goto exit;
}
if (num_configs) {
ret = pinctrl_utils_add_map_configs(pctldev, map,
reserved_maps, num_maps, group_name,
configs, num_configs,
PIN_MAP_TYPE_CONFIGS_PIN);
if (ret < 0) {
dev_err(pctldev->dev,
"%pOF add configs map failed %d\n",
np, ret);
goto exit;
}
}
}
ret = 0;
exit:
kfree(configs);
return ret;
}
static int k210_pinctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
struct device_node *np_config,
struct pinctrl_map **map,
unsigned int *num_maps)
{
unsigned int reserved_maps;
struct device_node *np;
int ret;
reserved_maps = 0;
*map = NULL;
*num_maps = 0;
ret = k210_pinctrl_dt_subnode_to_map(pctldev, np_config, map,
&reserved_maps, num_maps);
if (ret < 0)
goto err;
for_each_available_child_of_node(np_config, np) {
ret = k210_pinctrl_dt_subnode_to_map(pctldev, np, map,
&reserved_maps, num_maps);
if (ret < 0)
goto err;
}
return 0;
err:
pinctrl_utils_free_map(pctldev, *map, *num_maps);
return ret;
}
static const struct pinctrl_ops k210_pinctrl_ops = {
.get_groups_count = k210_pinctrl_get_groups_count,
.get_group_name = k210_pinctrl_get_group_name,
.get_group_pins = k210_pinctrl_get_group_pins,
.pin_dbg_show = k210_pinctrl_pin_dbg_show,
.dt_node_to_map = k210_pinctrl_dt_node_to_map,
.dt_free_map = pinconf_generic_dt_free_map,
};
static struct pinctrl_desc k210_pinctrl_desc = {
.name = "k210-pinctrl",
.pins = k210_pins,
.npins = K210_NPINS,
.pctlops = &k210_pinctrl_ops,
.pmxops = &k210_pinmux_ops,
.confops = &k210_pinconf_ops,
.custom_params = k210_pinconf_custom_params,
.num_custom_params = ARRAY_SIZE(k210_pinconf_custom_params),
};
static void k210_fpioa_init_ties(struct k210_fpioa_data *pdata)
{
struct k210_fpioa __iomem *fpioa = pdata->fpioa;
u32 val;
int i, j;
dev_dbg(pdata->dev, "Init pin ties\n");
/* Init pin functions input ties */
for (i = 0; i < ARRAY_SIZE(fpioa->tie_en); i++) {
val = 0;
for (j = 0; j < 32; j++) {
if (k210_pcf_infos[i * 32 + j].mode_id ==
K210_PC_DEFAULT_IN_TIE) {
dev_dbg(pdata->dev,
"tie_en function %d (%s)\n",
i * 32 + j,
k210_pcf_infos[i * 32 + j].name);
val |= BIT(j);
}
}
/* Set value before enable */
writel(val, &fpioa->tie_val[i]);
writel(val, &fpioa->tie_en[i]);
}
}
static int k210_fpioa_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct k210_fpioa_data *pdata;
int ret;
dev_info(dev, "K210 FPIOA pin controller\n");
pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return -ENOMEM;
pdata->dev = dev;
platform_set_drvdata(pdev, pdata);
pdata->fpioa = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(pdata->fpioa))
return PTR_ERR(pdata->fpioa);
pdata->clk = devm_clk_get(dev, "ref");
if (IS_ERR(pdata->clk))
return PTR_ERR(pdata->clk);
ret = clk_prepare_enable(pdata->clk);
if (ret)
return ret;
pdata->pclk = devm_clk_get_optional(dev, "pclk");
if (!IS_ERR(pdata->pclk)) {
ret = clk_prepare_enable(pdata->pclk);
if (ret)
goto disable_clk;
}
pdata->sysctl_map =
syscon_regmap_lookup_by_phandle_args(np,
"canaan,k210-sysctl-power",
1, &pdata->power_offset);
if (IS_ERR(pdata->sysctl_map)) {
ret = PTR_ERR(pdata->sysctl_map);
goto disable_pclk;
}
k210_fpioa_init_ties(pdata);
pdata->pctl = pinctrl_register(&k210_pinctrl_desc, dev, (void *)pdata);
if (IS_ERR(pdata->pctl)) {
ret = PTR_ERR(pdata->pctl);
goto disable_pclk;
}
return 0;
disable_pclk:
clk_disable_unprepare(pdata->pclk);
disable_clk:
clk_disable_unprepare(pdata->clk);
return ret;
}
static const struct of_device_id k210_fpioa_dt_ids[] = {
{ .compatible = "canaan,k210-fpioa" },
{ /* sentinel */ },
};
static struct platform_driver k210_fpioa_driver = {
.probe = k210_fpioa_probe,
.driver = {
.name = "k210-fpioa",
.of_match_table = k210_fpioa_dt_ids,
},
};
builtin_platform_driver(k210_fpioa_driver);
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