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linux/drivers/pinctrl/pinctrl-lpc18xx.c
Joachim Eastwood 81825b111d pinctrl: lpc18xx: add nxp,gpio-pin-interrupt property 
Add support for setting up GPIO pin interrupts in the lpc18xx pinctrl
driver. The LPC18xx SCU contain two registers that sets up the signal
routing to the GPIO pin interrupt (PINT) block. The routing uses the
GPIO namespace and not the pin namespace so a lookup is preformed on
the pin.

Routing configuration is done in the device tree by using the new
nxp,gpio-pin-interrupt property. This property takes single parameter
which sets the PINT hwirq for the GPIO.

Signed-off-by: Joachim Eastwood <manabian@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2016-03-07 10:44:30 +07:00

1397 lines
42 KiB
C
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/*
* Pinctrl driver for NXP LPC18xx/LPC43xx System Control Unit (SCU)
*
* Copyright (C) 2015 Joachim Eastwood <manabian@gmail.com>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/bitops.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/pinctrl/pinconf-generic.h>
#include "core.h"
#include "pinctrl-utils.h"
/* LPC18XX SCU analog function registers */
#define LPC18XX_SCU_REG_ENAIO0 0xc88
#define LPC18XX_SCU_REG_ENAIO1 0xc8c
#define LPC18XX_SCU_REG_ENAIO2 0xc90
#define LPC18XX_SCU_REG_ENAIO2_DAC BIT(0)
/* LPC18XX SCU pin register definitions */
#define LPC18XX_SCU_PIN_MODE_MASK 0x7
#define LPC18XX_SCU_PIN_EPD BIT(3)
#define LPC18XX_SCU_PIN_EPUN BIT(4)
#define LPC18XX_SCU_PIN_EHS BIT(5)
#define LPC18XX_SCU_PIN_EZI BIT(6)
#define LPC18XX_SCU_PIN_ZIF BIT(7)
#define LPC18XX_SCU_PIN_EHD_MASK 0x300
#define LPC18XX_SCU_PIN_EHD_POS 8
#define LPC18XX_SCU_USB1_EPD BIT(2)
#define LPC18XX_SCU_USB1_EPWR BIT(4)
#define LPC18XX_SCU_I2C0_EFP BIT(0)
#define LPC18XX_SCU_I2C0_EHD BIT(2)
#define LPC18XX_SCU_I2C0_EZI BIT(3)
#define LPC18XX_SCU_I2C0_ZIF BIT(7)
#define LPC18XX_SCU_I2C0_SCL_SHIFT 0
#define LPC18XX_SCU_I2C0_SDA_SHIFT 8
#define LPC18XX_SCU_FUNC_PER_PIN 8
/* LPC18XX SCU pin interrupt select registers */
#define LPC18XX_SCU_PINTSEL0 0xe00
#define LPC18XX_SCU_PINTSEL1 0xe04
#define LPC18XX_SCU_PINTSEL_VAL_MASK 0xff
#define LPC18XX_SCU_PINTSEL_PORT_SHIFT 5
#define LPC18XX_SCU_IRQ_PER_PINTSEL 4
#define LPC18XX_GPIO_PINS_PER_PORT 32
#define LPC18XX_GPIO_PIN_INT_MAX 8
#define LPC18XX_SCU_PINTSEL_VAL(val, n) \
((val) << (((n) % LPC18XX_SCU_IRQ_PER_PINTSEL) * 8))
/* LPC18xx pin types */
enum {
TYPE_ND, /* Normal-drive */
TYPE_HD, /* High-drive */
TYPE_HS, /* High-speed */
TYPE_I2C0,
TYPE_USB1,
};
/* LPC18xx pin functions */
enum {
FUNC_R, /* Reserved */
FUNC_ADC,
FUNC_ADCTRIG,
FUNC_CAN0,
FUNC_CAN1,
FUNC_CGU_OUT,
FUNC_CLKIN,
FUNC_CLKOUT,
FUNC_CTIN,
FUNC_CTOUT,
FUNC_DAC,
FUNC_EMC,
FUNC_EMC_ALT,
FUNC_ENET,
FUNC_ENET_ALT,
FUNC_GPIO,
FUNC_I2C0,
FUNC_I2C1,
FUNC_I2S0_RX_MCLK,
FUNC_I2S0_RX_SCK,
FUNC_I2S0_RX_SDA,
FUNC_I2S0_RX_WS,
FUNC_I2S0_TX_MCLK,
FUNC_I2S0_TX_SCK,
FUNC_I2S0_TX_SDA,
FUNC_I2S0_TX_WS,
FUNC_I2S1,
FUNC_LCD,
FUNC_LCD_ALT,
FUNC_MCTRL,
FUNC_NMI,
FUNC_QEI,
FUNC_SDMMC,
FUNC_SGPIO,
FUNC_SPI,
FUNC_SPIFI,
FUNC_SSP0,
FUNC_SSP0_ALT,
FUNC_SSP1,
FUNC_TIMER0,
FUNC_TIMER1,
FUNC_TIMER2,
FUNC_TIMER3,
FUNC_TRACE,
FUNC_UART0,
FUNC_UART1,
FUNC_UART2,
FUNC_UART3,
FUNC_USB0,
FUNC_USB1,
FUNC_MAX
};
static const char *const lpc18xx_function_names[] = {
[FUNC_R] = "reserved",
[FUNC_ADC] = "adc",
[FUNC_ADCTRIG] = "adctrig",
[FUNC_CAN0] = "can0",
[FUNC_CAN1] = "can1",
[FUNC_CGU_OUT] = "cgu_out",
[FUNC_CLKIN] = "clkin",
[FUNC_CLKOUT] = "clkout",
[FUNC_CTIN] = "ctin",
[FUNC_CTOUT] = "ctout",
[FUNC_DAC] = "dac",
[FUNC_EMC] = "emc",
[FUNC_EMC_ALT] = "emc_alt",
[FUNC_ENET] = "enet",
[FUNC_ENET_ALT] = "enet_alt",
[FUNC_GPIO] = "gpio",
[FUNC_I2C0] = "i2c0",
[FUNC_I2C1] = "i2c1",
[FUNC_I2S0_RX_MCLK] = "i2s0_rx_mclk",
[FUNC_I2S0_RX_SCK] = "i2s0_rx_sck",
[FUNC_I2S0_RX_SDA] = "i2s0_rx_sda",
[FUNC_I2S0_RX_WS] = "i2s0_rx_ws",
[FUNC_I2S0_TX_MCLK] = "i2s0_tx_mclk",
[FUNC_I2S0_TX_SCK] = "i2s0_tx_sck",
[FUNC_I2S0_TX_SDA] = "i2s0_tx_sda",
[FUNC_I2S0_TX_WS] = "i2s0_tx_ws",
[FUNC_I2S1] = "i2s1",
[FUNC_LCD] = "lcd",
[FUNC_LCD_ALT] = "lcd_alt",
[FUNC_MCTRL] = "mctrl",
[FUNC_NMI] = "nmi",
[FUNC_QEI] = "qei",
[FUNC_SDMMC] = "sdmmc",
[FUNC_SGPIO] = "sgpio",
[FUNC_SPI] = "spi",
[FUNC_SPIFI] = "spifi",
[FUNC_SSP0] = "ssp0",
[FUNC_SSP0_ALT] = "ssp0_alt",
[FUNC_SSP1] = "ssp1",
[FUNC_TIMER0] = "timer0",
[FUNC_TIMER1] = "timer1",
[FUNC_TIMER2] = "timer2",
[FUNC_TIMER3] = "timer3",
[FUNC_TRACE] = "trace",
[FUNC_UART0] = "uart0",
[FUNC_UART1] = "uart1",
[FUNC_UART2] = "uart2",
[FUNC_UART3] = "uart3",
[FUNC_USB0] = "usb0",
[FUNC_USB1] = "usb1",
};
struct lpc18xx_pmx_func {
const char **groups;
unsigned ngroups;
};
struct lpc18xx_scu_data {
struct pinctrl_dev *pctl;
void __iomem *base;
struct clk *clk;
struct lpc18xx_pmx_func func[FUNC_MAX];
};
struct lpc18xx_pin_caps {
unsigned int offset;
unsigned char functions[LPC18XX_SCU_FUNC_PER_PIN];
unsigned char analog;
unsigned char type;
};
/* Analog pins are required to have both bias and input disabled */
#define LPC18XX_SCU_ANALOG_PIN_CFG 0x10
/* Macros to maniupluate analog member in lpc18xx_pin_caps */
#define LPC18XX_ANALOG_PIN BIT(7)
#define LPC18XX_ANALOG_ADC(a) ((a >> 5) & 0x3)
#define LPC18XX_ANALOG_BIT_MASK 0x1f
#define ADC0 (LPC18XX_ANALOG_PIN | (0x00 << 5))
#define ADC1 (LPC18XX_ANALOG_PIN | (0x01 << 5))
#define DAC LPC18XX_ANALOG_PIN
#define LPC_P(port, pin, f0, f1, f2, f3, f4, f5, f6, f7, a, t) \
static struct lpc18xx_pin_caps lpc18xx_pin_p##port##_##pin = { \
.offset = 0x##port * 32 * 4 + pin * 4, \
.functions = { \
FUNC_##f0, FUNC_##f1, FUNC_##f2, \
FUNC_##f3, FUNC_##f4, FUNC_##f5, \
FUNC_##f6, FUNC_##f7, \
}, \
.analog = a, \
.type = TYPE_##t, \
}
#define LPC_N(pname, off, f0, f1, f2, f3, f4, f5, f6, f7, a, t) \
static struct lpc18xx_pin_caps lpc18xx_pin_##pname = { \
.offset = off, \
.functions = { \
FUNC_##f0, FUNC_##f1, FUNC_##f2, \
FUNC_##f3, FUNC_##f4, FUNC_##f5, \
FUNC_##f6, FUNC_##f7, \
}, \
.analog = a, \
.type = TYPE_##t, \
}
/* Pinmuxing table taken from data sheet */
/* Pin FUNC0 FUNC1 FUNC2 FUNC3 FUNC4 FUNC5 FUNC6 FUNC7 ANALOG TYPE */
LPC_P(0,0, GPIO, SSP1, ENET, SGPIO, R, R, I2S0_TX_WS,I2S1, 0, ND);
LPC_P(0,1, GPIO, SSP1,ENET_ALT,SGPIO, R, R, ENET, I2S1, 0, ND);
LPC_P(1,0, GPIO, CTIN, EMC, R, R, SSP0, SGPIO, R, 0, ND);
LPC_P(1,1, GPIO, CTOUT, EMC, SGPIO, R, SSP0, R, R, 0, ND);
LPC_P(1,2, GPIO, CTOUT, EMC, SGPIO, R, SSP0, R, R, 0, ND);
LPC_P(1,3, GPIO, CTOUT, SGPIO, EMC, USB0, SSP1, R, SDMMC, 0, ND);
LPC_P(1,4, GPIO, CTOUT, SGPIO, EMC, USB0, SSP1, R, SDMMC, 0, ND);
LPC_P(1,5, GPIO, CTOUT, R, EMC, USB0, SSP1, SGPIO, SDMMC, 0, ND);
LPC_P(1,6, GPIO, CTIN, R, EMC, R, R, SGPIO, SDMMC, 0, ND);
LPC_P(1,7, GPIO, UART1, CTOUT, EMC, USB0, R, R, R, 0, ND);
LPC_P(1,8, GPIO, UART1, CTOUT, EMC, R, R, R, SDMMC, 0, ND);
LPC_P(1,9, GPIO, UART1, CTOUT, EMC, R, R, R, SDMMC, 0, ND);
LPC_P(1,10, GPIO, UART1, CTOUT, EMC, R, R, R, SDMMC, 0, ND);
LPC_P(1,11, GPIO, UART1, CTOUT, EMC, R, R, R, SDMMC, 0, ND);
LPC_P(1,12, GPIO, UART1, R, EMC, TIMER0, R, SGPIO, SDMMC, 0, ND);
LPC_P(1,13, GPIO, UART1, R, EMC, TIMER0, R, SGPIO, SDMMC, 0, ND);
LPC_P(1,14, GPIO, UART1, R, EMC, TIMER0, R, SGPIO, R, 0, ND);
LPC_P(1,15, GPIO, UART2, SGPIO, ENET, TIMER0, R, R, R, 0, ND);
LPC_P(1,16, GPIO, UART2, SGPIO,ENET_ALT,TIMER0, R, R, ENET, 0, ND);
LPC_P(1,17, GPIO, UART2, R, ENET, TIMER0, CAN1, SGPIO, R, 0, HD);
LPC_P(1,18, GPIO, UART2, R, ENET, TIMER0, CAN1, SGPIO, R, 0, ND);
LPC_P(1,19, ENET, SSP1, R, R, CLKOUT, R, I2S0_RX_MCLK,I2S1, 0, ND);
LPC_P(1,20, GPIO, SSP1, R, ENET, TIMER0, R, SGPIO, R, 0, ND);
LPC_P(2,0, SGPIO, UART0, EMC, USB0, GPIO, R, TIMER3, ENET, 0, ND);
LPC_P(2,1, SGPIO, UART0, EMC, USB0, GPIO, R, TIMER3, R, 0, ND);
LPC_P(2,2, SGPIO, UART0, EMC, USB0, GPIO, CTIN, TIMER3, R, 0, ND);
LPC_P(2,3, SGPIO, I2C1, UART3, CTIN, GPIO, R, TIMER3, USB0, 0, HD);
LPC_P(2,4, SGPIO, I2C1, UART3, CTIN, GPIO, R, TIMER3, USB0, 0, HD);
LPC_P(2,5, SGPIO, CTIN, USB1, ADCTRIG, GPIO, R, TIMER3, USB0, 0, HD);
LPC_P(2,6, SGPIO, UART0, EMC, USB0, GPIO, CTIN, TIMER3, R, 0, ND);
LPC_P(2,7, GPIO, CTOUT, UART3, EMC, R, R, TIMER3, R, 0, ND);
LPC_P(2,8, SGPIO, CTOUT, UART3, EMC, GPIO, R, R, R, 0, ND);
LPC_P(2,9, GPIO, CTOUT, UART3, EMC, R, R, R, R, 0, ND);
LPC_P(2,10, GPIO, CTOUT, UART2, EMC, R, R, R, R, 0, ND);
LPC_P(2,11, GPIO, CTOUT, UART2, EMC, R, R, R, R, 0, ND);
LPC_P(2,12, GPIO, CTOUT, R, EMC, R, R, R, UART2, 0, ND);
LPC_P(2,13, GPIO, CTIN, R, EMC, R, R, R, UART2, 0, ND);
LPC_P(3,0, I2S0_RX_SCK, I2S0_RX_MCLK, I2S0_TX_SCK, I2S0_TX_MCLK,SSP0,R,R,R, 0, ND);
LPC_P(3,1, I2S0_TX_WS, I2S0_RX_WS,CAN0,USB1,GPIO, R, LCD, R, 0, ND);
LPC_P(3,2, I2S0_TX_SDA, I2S0_RX_SDA,CAN0,USB1,GPIO, R, LCD, R, 0, ND);
LPC_P(3,3, R, SPI, SSP0, SPIFI, CGU_OUT,R, I2S0_TX_MCLK, I2S1, 0, HS);
LPC_P(3,4, GPIO, R, R, SPIFI, UART1, I2S0_TX_WS, I2S1, LCD, 0, ND);
LPC_P(3,5, GPIO, R, R, SPIFI, UART1, I2S0_TX_SDA,I2S1, LCD, 0, ND);
LPC_P(3,6, GPIO, SPI, SSP0, SPIFI, R, SSP0_ALT, R, R, 0, ND);
LPC_P(3,7, R, SPI, SSP0, SPIFI, GPIO, SSP0_ALT, R, R, 0, ND);
LPC_P(3,8, R, SPI, SSP0, SPIFI, GPIO, SSP0_ALT, R, R, 0, ND);
LPC_P(4,0, GPIO, MCTRL, NMI, R, R, LCD, UART3, R, 0, ND);
LPC_P(4,1, GPIO, CTOUT, LCD, R, R, LCD_ALT, UART3, ENET, ADC0|1, ND);
LPC_P(4,2, GPIO, CTOUT, LCD, R, R, LCD_ALT, UART3, SGPIO, 0, ND);
LPC_P(4,3, GPIO, CTOUT, LCD, R, R, LCD_ALT, UART3, SGPIO, ADC0|0, ND);
LPC_P(4,4, GPIO, CTOUT, LCD, R, R, LCD_ALT, UART3, SGPIO, DAC, ND);
LPC_P(4,5, GPIO, CTOUT, LCD, R, R, R, R, SGPIO, 0, ND);
LPC_P(4,6, GPIO, CTOUT, LCD, R, R, R, R, SGPIO, 0, ND);
LPC_P(4,7, LCD, CLKIN, R, R, R, R, I2S1,I2S0_TX_SCK, 0, ND);
LPC_P(4,8, R, CTIN, LCD, R, GPIO, LCD_ALT, CAN1, SGPIO, 0, ND);
LPC_P(4,9, R, CTIN, LCD, R, GPIO, LCD_ALT, CAN1, SGPIO, 0, ND);
LPC_P(4,10, R, CTIN, LCD, R, GPIO, LCD_ALT, R, SGPIO, 0, ND);
LPC_P(5,0, GPIO, MCTRL, EMC, R, UART1, TIMER1, R, R, 0, ND);
LPC_P(5,1, GPIO, MCTRL, EMC, R, UART1, TIMER1, R, R, 0, ND);
LPC_P(5,2, GPIO, MCTRL, EMC, R, UART1, TIMER1, R, R, 0, ND);
LPC_P(5,3, GPIO, MCTRL, EMC, R, UART1, TIMER1, R, R, 0, ND);
LPC_P(5,4, GPIO, MCTRL, EMC, R, UART1, TIMER1, R, R, 0, ND);
LPC_P(5,5, GPIO, MCTRL, EMC, R, UART1, TIMER1, R, R, 0, ND);
LPC_P(5,6, GPIO, MCTRL, EMC, R, UART1, TIMER1, R, R, 0, ND);
LPC_P(5,7, GPIO, MCTRL, EMC, R, UART1, TIMER1, R, R, 0, ND);
LPC_P(6,0, R, I2S0_RX_MCLK,R, R, I2S0_RX_SCK, R, R, R, 0, ND);
LPC_P(6,1, GPIO, EMC, UART0, I2S0_RX_WS, R, TIMER2, R, R, 0, ND);
LPC_P(6,2, GPIO, EMC, UART0, I2S0_RX_SDA, R, TIMER2, R, R, 0, ND);
LPC_P(6,3, GPIO, USB0, SGPIO, EMC, R, TIMER2, R, R, 0, ND);
LPC_P(6,4, GPIO, CTIN, UART0, EMC, R, R, R, R, 0, ND);
LPC_P(6,5, GPIO, CTOUT, UART0, EMC, R, R, R, R, 0, ND);
LPC_P(6,6, GPIO, EMC, SGPIO, USB0, R, TIMER2, R, R, 0, ND);
LPC_P(6,7, R, EMC, SGPIO, USB0, GPIO, TIMER2, R, R, 0, ND);
LPC_P(6,8, R, EMC, SGPIO, USB0, GPIO, TIMER2, R, R, 0, ND);
LPC_P(6,9, GPIO, R, R, EMC, R, TIMER2, R, R, 0, ND);
LPC_P(6,10, GPIO, MCTRL, R, EMC, R, R, R, R, 0, ND);
LPC_P(6,11, GPIO, R, R, EMC, R, TIMER2, R, R, 0, ND);
LPC_P(6,12, GPIO, CTOUT, R, EMC, R, R, R, R, 0, ND);
LPC_P(7,0, GPIO, CTOUT, R, LCD, R, R, R, SGPIO, 0, ND);
LPC_P(7,1, GPIO, CTOUT,I2S0_TX_WS,LCD,LCD_ALT, R, UART2, SGPIO, 0, ND);
LPC_P(7,2, GPIO, CTIN,I2S0_TX_SDA,LCD,LCD_ALT, R, UART2, SGPIO, 0, ND);
LPC_P(7,3, GPIO, CTIN, R, LCD,LCD_ALT, R, R, R, 0, ND);
LPC_P(7,4, GPIO, CTOUT, R, LCD,LCD_ALT, TRACE, R, R, ADC0|4, ND);
LPC_P(7,5, GPIO, CTOUT, R, LCD,LCD_ALT, TRACE, R, R, ADC0|3, ND);
LPC_P(7,6, GPIO, CTOUT, R, LCD, R, TRACE, R, R, 0, ND);
LPC_P(7,7, GPIO, CTOUT, R, LCD, R, TRACE, ENET, SGPIO, ADC1|6, ND);
LPC_P(8,0, GPIO, USB0, R, MCTRL, SGPIO, R, R, TIMER0, 0, HD);
LPC_P(8,1, GPIO, USB0, R, MCTRL, SGPIO, R, R, TIMER0, 0, HD);
LPC_P(8,2, GPIO, USB0, R, MCTRL, SGPIO, R, R, TIMER0, 0, HD);
LPC_P(8,3, GPIO, USB1, R, LCD, LCD_ALT, R, R, TIMER0, 0, ND);
LPC_P(8,4, GPIO, USB1, R, LCD, LCD_ALT, R, R, TIMER0, 0, ND);
LPC_P(8,5, GPIO, USB1, R, LCD, LCD_ALT, R, R, TIMER0, 0, ND);
LPC_P(8,6, GPIO, USB1, R, LCD, LCD_ALT, R, R, TIMER0, 0, ND);
LPC_P(8,7, GPIO, USB1, R, LCD, LCD_ALT, R, R, TIMER0, 0, ND);
LPC_P(8,8, R, USB1, R, R, R, R,CGU_OUT, I2S1, 0, ND);
LPC_P(9,0, GPIO, MCTRL, R, R, R, ENET, SGPIO, SSP0, 0, ND);
LPC_P(9,1, GPIO, MCTRL, R, R, I2S0_TX_WS,ENET, SGPIO, SSP0, 0, ND);
LPC_P(9,2, GPIO, MCTRL, R, R, I2S0_TX_SDA,ENET,SGPIO, SSP0, 0, ND);
LPC_P(9,3, GPIO, MCTRL, USB1, R, R, ENET, SGPIO, UART3, 0, ND);
LPC_P(9,4, R, MCTRL, USB1, R, GPIO, ENET, SGPIO, UART3, 0, ND);
LPC_P(9,5, R, MCTRL, USB1, R, GPIO, ENET, SGPIO, UART0, 0, ND);
LPC_P(9,6, GPIO, MCTRL, USB1, R, R, ENET, SGPIO, UART0, 0, ND);
LPC_P(a,0, R, R, R, R, R, I2S1, CGU_OUT, R, 0, ND);
LPC_P(a,1, GPIO, QEI, R, UART2, R, R, R, R, 0, HD);
LPC_P(a,2, GPIO, QEI, R, UART2, R, R, R, R, 0, HD);
LPC_P(a,3, GPIO, QEI, R, R, R, R, R, R, 0, HD);
LPC_P(a,4, R, CTOUT, R, EMC, GPIO, R, R, R, 0, ND);
LPC_P(b,0, R, CTOUT, LCD, R, GPIO, R, R, R, 0, ND);
LPC_P(b,1, R, USB1, LCD, R, GPIO, CTOUT, R, R, 0, ND);
LPC_P(b,2, R, USB1, LCD, R, GPIO, CTOUT, R, R, 0, ND);
LPC_P(b,3, R, USB1, LCD, R, GPIO, CTOUT, R, R, 0, ND);
LPC_P(b,4, R, USB1, LCD, R, GPIO, CTIN, R, R, 0, ND);
LPC_P(b,5, R, USB1, LCD, R, GPIO, CTIN, LCD_ALT, R, 0, ND);
LPC_P(b,6, R, USB1, LCD, R, GPIO, CTIN, LCD_ALT, R, ADC0|6, ND);
LPC_P(c,0, R, USB1, R, ENET, LCD, R, R, SDMMC, ADC1|1, ND);
LPC_P(c,1, USB1, R, UART1, ENET, GPIO, R, TIMER3, SDMMC, 0, ND);
LPC_P(c,2, USB1, R, UART1, ENET, GPIO, R, R, SDMMC, 0, ND);
LPC_P(c,3, USB1, R, UART1, ENET, GPIO, R, R, SDMMC, ADC1|0, ND);
LPC_P(c,4, R, USB1, R, ENET, GPIO, R, TIMER3, SDMMC, 0, ND);
LPC_P(c,5, R, USB1, R, ENET, GPIO, R, TIMER3, SDMMC, 0, ND);
LPC_P(c,6, R, USB1, R, ENET, GPIO, R, TIMER3, SDMMC, 0, ND);
LPC_P(c,7, R, USB1, R, ENET, GPIO, R, TIMER3, SDMMC, 0, ND);
LPC_P(c,8, R, USB1, R, ENET, GPIO, R, TIMER3, SDMMC, 0, ND);
LPC_P(c,9, R, USB1, R, ENET, GPIO, R, TIMER3, SDMMC, 0, ND);
LPC_P(c,10, R, USB1, UART1, R, GPIO, R, TIMER3, SDMMC, 0, ND);
LPC_P(c,11, R, USB1, UART1, R, GPIO, R, R, SDMMC, 0, ND);
LPC_P(c,12, R, R, UART1, R, GPIO, SGPIO, I2S0_TX_SDA,SDMMC, 0, ND);
LPC_P(c,13, R, R, UART1, R, GPIO, SGPIO, I2S0_TX_WS, SDMMC, 0, ND);
LPC_P(c,14, R, R, UART1, R, GPIO, SGPIO, ENET, SDMMC, 0, ND);
LPC_P(d,0, R, CTOUT, EMC, R, GPIO, R, R, SGPIO, 0, ND);
LPC_P(d,1, R, R, EMC, R, GPIO, SDMMC, R, SGPIO, 0, ND);
LPC_P(d,2, R, CTOUT, EMC, R, GPIO, R, R, SGPIO, 0, ND);
LPC_P(d,3, R, CTOUT, EMC, R, GPIO, R, R, SGPIO, 0, ND);
LPC_P(d,4, R, CTOUT, EMC, R, GPIO, R, R, SGPIO, 0, ND);
LPC_P(d,5, R, CTOUT, EMC, R, GPIO, R, R, SGPIO, 0, ND);
LPC_P(d,6, R, CTOUT, EMC, R, GPIO, R, R, SGPIO, 0, ND);
LPC_P(d,7, R, CTIN, EMC, R, GPIO, R, R, SGPIO, 0, ND);
LPC_P(d,8, R, CTIN, EMC, R, GPIO, R, R, SGPIO, 0, ND);
LPC_P(d,9, R, CTOUT, EMC, R, GPIO, R, R, SGPIO, 0, ND);
LPC_P(d,10, R, CTIN, EMC, R, GPIO, R, R, R, 0, ND);
LPC_P(d,11, R, R, EMC, R, GPIO, USB1, CTOUT, R, 0, ND);
LPC_P(d,12, R, R, EMC, R, GPIO, R, CTOUT, R, 0, ND);
LPC_P(d,13, R, CTIN, EMC, R, GPIO, R, CTOUT, R, 0, ND);
LPC_P(d,14, R, R, EMC, R, GPIO, R, CTOUT, R, 0, ND);
LPC_P(d,15, R, R, EMC, R, GPIO, SDMMC, CTOUT, R, 0, ND);
LPC_P(d,16, R, R, EMC, R, GPIO, SDMMC, CTOUT, R, 0, ND);
LPC_P(e,0, R, R, R, EMC, GPIO, CAN1, R, R, 0, ND);
LPC_P(e,1, R, R, R, EMC, GPIO, CAN1, R, R, 0, ND);
LPC_P(e,2,ADCTRIG, CAN0, R, EMC, GPIO, R, R, R, 0, ND);
LPC_P(e,3, R, CAN0,ADCTRIG, EMC, GPIO, R, R, R, 0, ND);
LPC_P(e,4, R, NMI, R, EMC, GPIO, R, R, R, 0, ND);
LPC_P(e,5, R, CTOUT, UART1, EMC, GPIO, R, R, R, 0, ND);
LPC_P(e,6, R, CTOUT, UART1, EMC, GPIO, R, R, R, 0, ND);
LPC_P(e,7, R, CTOUT, UART1, EMC, GPIO, R, R, R, 0, ND);
LPC_P(e,8, R, CTOUT, UART1, EMC, GPIO, R, R, R, 0, ND);
LPC_P(e,9, R, CTIN, UART1, EMC, GPIO, R, R, R, 0, ND);
LPC_P(e,10, R, CTIN, UART1, EMC, GPIO, R, R, R, 0, ND);
LPC_P(e,11, R, CTOUT, UART1, EMC, GPIO, R, R, R, 0, ND);
LPC_P(e,12, R, CTOUT, UART1, EMC, GPIO, R, R, R, 0, ND);
LPC_P(e,13, R, CTOUT, I2C1, EMC, GPIO, R, R, R, 0, ND);
LPC_P(e,14, R, R, R, EMC, GPIO, R, R, R, 0, ND);
LPC_P(e,15, R, CTOUT, I2C1, EMC, GPIO, R, R, R, 0, ND);
LPC_P(f,0, SSP0, CLKIN, R, R, R, R, R, I2S1, 0, ND);
LPC_P(f,1, R, R, SSP0, R, GPIO, R, SGPIO, R, 0, ND);
LPC_P(f,2, R, UART3, SSP0, R, GPIO, R, SGPIO, R, 0, ND);
LPC_P(f,3, R, UART3, SSP0, R, GPIO, R, SGPIO, R, 0, ND);
LPC_P(f,4, SSP1, CLKIN, TRACE, R, R, R, I2S0_TX_MCLK,I2S0_RX_SCK, 0, ND);
LPC_P(f,5, R, UART3, SSP1, TRACE, GPIO, R, SGPIO, R, ADC1|4, ND);
LPC_P(f,6, R, UART3, SSP1, TRACE, GPIO, R, SGPIO, I2S1, ADC1|3, ND);
LPC_P(f,7, R, UART3, SSP1, TRACE, GPIO, R, SGPIO, I2S1, ADC1|7, ND);
LPC_P(f,8, R, UART0, CTIN, TRACE, GPIO, R, SGPIO, R, ADC0|2, ND);
LPC_P(f,9, R, UART0, CTOUT, R, GPIO, R, SGPIO, R, ADC1|2, ND);
LPC_P(f,10, R, UART0, R, R, GPIO, R, SDMMC, R, ADC0|5, ND);
LPC_P(f,11, R, UART0, R, R, GPIO, R, SDMMC, R, ADC1|5, ND);
/* Pin Offset FUNC0 FUNC1 FUNC2 FUNC3 FUNC4 FUNC5 FUNC6 FUNC7 ANALOG TYPE */
LPC_N(clk0, 0xc00, EMC, CLKOUT, R, R, SDMMC, EMC_ALT, SSP1, ENET, 0, HS);
LPC_N(clk1, 0xc04, EMC, CLKOUT, R, R, R, CGU_OUT, R, I2S1, 0, HS);
LPC_N(clk2, 0xc08, EMC, CLKOUT, R, R, SDMMC, EMC_ALT,I2S0_TX_MCLK,I2S1, 0, HS);
LPC_N(clk3, 0xc0c, EMC, CLKOUT, R, R, R, CGU_OUT, R, I2S1, 0, HS);
LPC_N(usb1_dm, 0xc80, R, R, R, R, R, R, R, R, 0, USB1);
LPC_N(usb1_dp, 0xc80, R, R, R, R, R, R, R, R, 0, USB1);
LPC_N(i2c0_scl, 0xc84, R, R, R, R, R, R, R, R, 0, I2C0);
LPC_N(i2c0_sda, 0xc84, R, R, R, R, R, R, R, R, 0, I2C0);
#define LPC18XX_PIN_P(port, pin) { \
.number = 0x##port * 32 + pin, \
.name = "p"#port"_"#pin, \
.drv_data = &lpc18xx_pin_p##port##_##pin \
}
/* Pin numbers for special pins */
enum {
PIN_CLK0 = 600,
PIN_CLK1,
PIN_CLK2,
PIN_CLK3,
PIN_USB1_DM,
PIN_USB1_DP,
PIN_I2C0_SCL,
PIN_I2C0_SDA,
};
#define LPC18XX_PIN(pname, n) { \
.number = n, \
.name = #pname, \
.drv_data = &lpc18xx_pin_##pname \
}
static const struct pinctrl_pin_desc lpc18xx_pins[] = {
LPC18XX_PIN_P(0,0),
LPC18XX_PIN_P(0,1),
LPC18XX_PIN_P(1,0),
LPC18XX_PIN_P(1,1),
LPC18XX_PIN_P(1,2),
LPC18XX_PIN_P(1,3),
LPC18XX_PIN_P(1,4),
LPC18XX_PIN_P(1,5),
LPC18XX_PIN_P(1,6),
LPC18XX_PIN_P(1,7),
LPC18XX_PIN_P(1,8),
LPC18XX_PIN_P(1,9),
LPC18XX_PIN_P(1,10),
LPC18XX_PIN_P(1,11),
LPC18XX_PIN_P(1,12),
LPC18XX_PIN_P(1,13),
LPC18XX_PIN_P(1,14),
LPC18XX_PIN_P(1,15),
LPC18XX_PIN_P(1,16),
LPC18XX_PIN_P(1,17),
LPC18XX_PIN_P(1,18),
LPC18XX_PIN_P(1,19),
LPC18XX_PIN_P(1,20),
LPC18XX_PIN_P(2,0),
LPC18XX_PIN_P(2,1),
LPC18XX_PIN_P(2,2),
LPC18XX_PIN_P(2,3),
LPC18XX_PIN_P(2,4),
LPC18XX_PIN_P(2,5),
LPC18XX_PIN_P(2,6),
LPC18XX_PIN_P(2,7),
LPC18XX_PIN_P(2,8),
LPC18XX_PIN_P(2,9),
LPC18XX_PIN_P(2,10),
LPC18XX_PIN_P(2,11),
LPC18XX_PIN_P(2,12),
LPC18XX_PIN_P(2,13),
LPC18XX_PIN_P(3,0),
LPC18XX_PIN_P(3,1),
LPC18XX_PIN_P(3,2),
LPC18XX_PIN_P(3,3),
LPC18XX_PIN_P(3,4),
LPC18XX_PIN_P(3,5),
LPC18XX_PIN_P(3,6),
LPC18XX_PIN_P(3,7),
LPC18XX_PIN_P(3,8),
LPC18XX_PIN_P(4,0),
LPC18XX_PIN_P(4,1),
LPC18XX_PIN_P(4,2),
LPC18XX_PIN_P(4,3),
LPC18XX_PIN_P(4,4),
LPC18XX_PIN_P(4,5),
LPC18XX_PIN_P(4,6),
LPC18XX_PIN_P(4,7),
LPC18XX_PIN_P(4,8),
LPC18XX_PIN_P(4,9),
LPC18XX_PIN_P(4,10),
LPC18XX_PIN_P(5,0),
LPC18XX_PIN_P(5,1),
LPC18XX_PIN_P(5,2),
LPC18XX_PIN_P(5,3),
LPC18XX_PIN_P(5,4),
LPC18XX_PIN_P(5,5),
LPC18XX_PIN_P(5,6),
LPC18XX_PIN_P(5,7),
LPC18XX_PIN_P(6,0),
LPC18XX_PIN_P(6,1),
LPC18XX_PIN_P(6,2),
LPC18XX_PIN_P(6,3),
LPC18XX_PIN_P(6,4),
LPC18XX_PIN_P(6,5),
LPC18XX_PIN_P(6,6),
LPC18XX_PIN_P(6,7),
LPC18XX_PIN_P(6,8),
LPC18XX_PIN_P(6,9),
LPC18XX_PIN_P(6,10),
LPC18XX_PIN_P(6,11),
LPC18XX_PIN_P(6,12),
LPC18XX_PIN_P(7,0),
LPC18XX_PIN_P(7,1),
LPC18XX_PIN_P(7,2),
LPC18XX_PIN_P(7,3),
LPC18XX_PIN_P(7,4),
LPC18XX_PIN_P(7,5),
LPC18XX_PIN_P(7,6),
LPC18XX_PIN_P(7,7),
LPC18XX_PIN_P(8,0),
LPC18XX_PIN_P(8,1),
LPC18XX_PIN_P(8,2),
LPC18XX_PIN_P(8,3),
LPC18XX_PIN_P(8,4),
LPC18XX_PIN_P(8,5),
LPC18XX_PIN_P(8,6),
LPC18XX_PIN_P(8,7),
LPC18XX_PIN_P(8,8),
LPC18XX_PIN_P(9,0),
LPC18XX_PIN_P(9,1),
LPC18XX_PIN_P(9,2),
LPC18XX_PIN_P(9,3),
LPC18XX_PIN_P(9,4),
LPC18XX_PIN_P(9,5),
LPC18XX_PIN_P(9,6),
LPC18XX_PIN_P(a,0),
LPC18XX_PIN_P(a,1),
LPC18XX_PIN_P(a,2),
LPC18XX_PIN_P(a,3),
LPC18XX_PIN_P(a,4),
LPC18XX_PIN_P(b,0),
LPC18XX_PIN_P(b,1),
LPC18XX_PIN_P(b,2),
LPC18XX_PIN_P(b,3),
LPC18XX_PIN_P(b,4),
LPC18XX_PIN_P(b,5),
LPC18XX_PIN_P(b,6),
LPC18XX_PIN_P(c,0),
LPC18XX_PIN_P(c,1),
LPC18XX_PIN_P(c,2),
LPC18XX_PIN_P(c,3),
LPC18XX_PIN_P(c,4),
LPC18XX_PIN_P(c,5),
LPC18XX_PIN_P(c,6),
LPC18XX_PIN_P(c,7),
LPC18XX_PIN_P(c,8),
LPC18XX_PIN_P(c,9),
LPC18XX_PIN_P(c,10),
LPC18XX_PIN_P(c,11),
LPC18XX_PIN_P(c,12),
LPC18XX_PIN_P(c,13),
LPC18XX_PIN_P(c,14),
LPC18XX_PIN_P(d,0),
LPC18XX_PIN_P(d,1),
LPC18XX_PIN_P(d,2),
LPC18XX_PIN_P(d,3),
LPC18XX_PIN_P(d,4),
LPC18XX_PIN_P(d,5),
LPC18XX_PIN_P(d,6),
LPC18XX_PIN_P(d,7),
LPC18XX_PIN_P(d,8),
LPC18XX_PIN_P(d,9),
LPC18XX_PIN_P(d,10),
LPC18XX_PIN_P(d,11),
LPC18XX_PIN_P(d,12),
LPC18XX_PIN_P(d,13),
LPC18XX_PIN_P(d,14),
LPC18XX_PIN_P(d,15),
LPC18XX_PIN_P(d,16),
LPC18XX_PIN_P(e,0),
LPC18XX_PIN_P(e,1),
LPC18XX_PIN_P(e,2),
LPC18XX_PIN_P(e,3),
LPC18XX_PIN_P(e,4),
LPC18XX_PIN_P(e,5),
LPC18XX_PIN_P(e,6),
LPC18XX_PIN_P(e,7),
LPC18XX_PIN_P(e,8),
LPC18XX_PIN_P(e,9),
LPC18XX_PIN_P(e,10),
LPC18XX_PIN_P(e,11),
LPC18XX_PIN_P(e,12),
LPC18XX_PIN_P(e,13),
LPC18XX_PIN_P(e,14),
LPC18XX_PIN_P(e,15),
LPC18XX_PIN_P(f,0),
LPC18XX_PIN_P(f,1),
LPC18XX_PIN_P(f,2),
LPC18XX_PIN_P(f,3),
LPC18XX_PIN_P(f,4),
LPC18XX_PIN_P(f,5),
LPC18XX_PIN_P(f,6),
LPC18XX_PIN_P(f,7),
LPC18XX_PIN_P(f,8),
LPC18XX_PIN_P(f,9),
LPC18XX_PIN_P(f,10),
LPC18XX_PIN_P(f,11),
LPC18XX_PIN(clk0, PIN_CLK0),
LPC18XX_PIN(clk1, PIN_CLK1),
LPC18XX_PIN(clk2, PIN_CLK2),
LPC18XX_PIN(clk3, PIN_CLK3),
LPC18XX_PIN(usb1_dm, PIN_USB1_DM),
LPC18XX_PIN(usb1_dp, PIN_USB1_DP),
LPC18XX_PIN(i2c0_scl, PIN_I2C0_SCL),
LPC18XX_PIN(i2c0_sda, PIN_I2C0_SDA),
};
/**
* enum lpc18xx_pin_config_param - possible pin configuration parameters
* @PIN_CONFIG_GPIO_PIN_INT: route gpio to the gpio pin interrupt
* controller.
*/
enum lpc18xx_pin_config_param {
PIN_CONFIG_GPIO_PIN_INT = PIN_CONFIG_END + 1,
};
static const struct pinconf_generic_params lpc18xx_params[] = {
{"nxp,gpio-pin-interrupt", PIN_CONFIG_GPIO_PIN_INT, 0},
};
#ifdef CONFIG_DEBUG_FS
static const struct pin_config_item lpc18xx_conf_items[ARRAY_SIZE(lpc18xx_params)] = {
PCONFDUMP(PIN_CONFIG_GPIO_PIN_INT, "gpio pin int", NULL, true),
};
#endif
static int lpc18xx_pconf_get_usb1(enum pin_config_param param, int *arg, u32 reg)
{
switch (param) {
case PIN_CONFIG_LOW_POWER_MODE:
if (reg & LPC18XX_SCU_USB1_EPWR)
*arg = 0;
else
*arg = 1;
break;
case PIN_CONFIG_BIAS_DISABLE:
if (reg & LPC18XX_SCU_USB1_EPD)
return -EINVAL;
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
if (reg & LPC18XX_SCU_USB1_EPD)
*arg = 1;
else
return -EINVAL;
break;
default:
return -ENOTSUPP;
}
return 0;
}
static int lpc18xx_pconf_get_i2c0(enum pin_config_param param, int *arg, u32 reg,
unsigned pin)
{
u8 shift;
if (pin == PIN_I2C0_SCL)
shift = LPC18XX_SCU_I2C0_SCL_SHIFT;
else
shift = LPC18XX_SCU_I2C0_SDA_SHIFT;
switch (param) {
case PIN_CONFIG_INPUT_ENABLE:
if (reg & (LPC18XX_SCU_I2C0_EZI << shift))
*arg = 1;
else
return -EINVAL;
break;
case PIN_CONFIG_SLEW_RATE:
if (reg & (LPC18XX_SCU_I2C0_EHD << shift))
*arg = 1;
else
*arg = 0;
break;
case PIN_CONFIG_INPUT_SCHMITT:
if (reg & (LPC18XX_SCU_I2C0_EFP << shift))
*arg = 3;
else
*arg = 50;
break;
case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
if (reg & (LPC18XX_SCU_I2C0_ZIF << shift))
return -EINVAL;
else
*arg = 1;
break;
default:
return -ENOTSUPP;
}
return 0;
}
static int lpc18xx_pin_to_gpio(struct pinctrl_dev *pctldev, unsigned pin)
{
struct pinctrl_gpio_range *range;
range = pinctrl_find_gpio_range_from_pin_nolock(pctldev, pin);
if (!range)
return -EINVAL;
return pin - range->pin_base + range->base;
}
static int lpc18xx_get_pintsel(void __iomem *addr, u32 val, int *arg)
{
u32 reg_val;
int i;
reg_val = readl(addr);
for (i = 0; i < LPC18XX_SCU_IRQ_PER_PINTSEL; i++) {
if ((reg_val & LPC18XX_SCU_PINTSEL_VAL_MASK) == val)
return 0;
reg_val >>= BITS_PER_BYTE;
*arg += 1;
}
return -EINVAL;
}
static u32 lpc18xx_gpio_to_pintsel_val(int gpio)
{
unsigned int gpio_port, gpio_pin;
gpio_port = gpio / LPC18XX_GPIO_PINS_PER_PORT;
gpio_pin = gpio % LPC18XX_GPIO_PINS_PER_PORT;
return gpio_pin | (gpio_port << LPC18XX_SCU_PINTSEL_PORT_SHIFT);
}
static int lpc18xx_pconf_get_gpio_pin_int(struct pinctrl_dev *pctldev,
int *arg, unsigned pin)
{
struct lpc18xx_scu_data *scu = pinctrl_dev_get_drvdata(pctldev);
int gpio, ret;
u32 val;
gpio = lpc18xx_pin_to_gpio(pctldev, pin);
if (gpio < 0)
return -ENOTSUPP;
val = lpc18xx_gpio_to_pintsel_val(gpio);
/*
* Check if this pin has been enabled as a interrupt in any of the two
* PINTSEL registers. *arg indicates which interrupt number (0-7).
*/
*arg = 0;
ret = lpc18xx_get_pintsel(scu->base + LPC18XX_SCU_PINTSEL0, val, arg);
if (ret == 0)
return ret;
return lpc18xx_get_pintsel(scu->base + LPC18XX_SCU_PINTSEL1, val, arg);
}
static int lpc18xx_pconf_get_pin(struct pinctrl_dev *pctldev, unsigned param,
int *arg, u32 reg, unsigned pin,
struct lpc18xx_pin_caps *pin_cap)
{
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
if ((!(reg & LPC18XX_SCU_PIN_EPD)) && (reg & LPC18XX_SCU_PIN_EPUN))
;
else
return -EINVAL;
break;
case PIN_CONFIG_BIAS_PULL_UP:
if (reg & LPC18XX_SCU_PIN_EPUN)
return -EINVAL;
else
*arg = 1;
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
if (reg & LPC18XX_SCU_PIN_EPD)
*arg = 1;
else
return -EINVAL;
break;
case PIN_CONFIG_INPUT_ENABLE:
if (reg & LPC18XX_SCU_PIN_EZI)
*arg = 1;
else
return -EINVAL;
break;
case PIN_CONFIG_SLEW_RATE:
if (pin_cap->type == TYPE_HD)
return -ENOTSUPP;
if (reg & LPC18XX_SCU_PIN_EHS)
*arg = 1;
else
*arg = 0;
break;
case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
if (reg & LPC18XX_SCU_PIN_ZIF)
return -EINVAL;
else
*arg = 1;
break;
case PIN_CONFIG_DRIVE_STRENGTH:
if (pin_cap->type != TYPE_HD)
return -ENOTSUPP;
*arg = (reg & LPC18XX_SCU_PIN_EHD_MASK) >> LPC18XX_SCU_PIN_EHD_POS;
switch (*arg) {
case 3: *arg += 5;
case 2: *arg += 5;
case 1: *arg += 3;
case 0: *arg += 4;
}
break;
case PIN_CONFIG_GPIO_PIN_INT:
return lpc18xx_pconf_get_gpio_pin_int(pctldev, arg, pin);
default:
return -ENOTSUPP;
}
return 0;
}
static struct lpc18xx_pin_caps *lpc18xx_get_pin_caps(unsigned pin)
{
int i;
for (i = 0; i < ARRAY_SIZE(lpc18xx_pins); i++) {
if (lpc18xx_pins[i].number == pin)
return lpc18xx_pins[i].drv_data;
}
return NULL;
}
static int lpc18xx_pconf_get(struct pinctrl_dev *pctldev, unsigned pin,
unsigned long *config)
{
struct lpc18xx_scu_data *scu = pinctrl_dev_get_drvdata(pctldev);
enum pin_config_param param = pinconf_to_config_param(*config);
struct lpc18xx_pin_caps *pin_cap;
int ret, arg = 0;
u32 reg;
pin_cap = lpc18xx_get_pin_caps(pin);
if (!pin_cap)
return -EINVAL;
reg = readl(scu->base + pin_cap->offset);
if (pin_cap->type == TYPE_I2C0)
ret = lpc18xx_pconf_get_i2c0(param, &arg, reg, pin);
else if (pin_cap->type == TYPE_USB1)
ret = lpc18xx_pconf_get_usb1(param, &arg, reg);
else
ret = lpc18xx_pconf_get_pin(pctldev, param, &arg, reg, pin, pin_cap);
if (ret < 0)
return ret;
*config = pinconf_to_config_packed(param, (u16)arg);
return 0;
}
static int lpc18xx_pconf_set_usb1(struct pinctrl_dev *pctldev,
enum pin_config_param param,
u16 param_val, u32 *reg)
{
switch (param) {
case PIN_CONFIG_LOW_POWER_MODE:
if (param_val)
*reg &= ~LPC18XX_SCU_USB1_EPWR;
else
*reg |= LPC18XX_SCU_USB1_EPWR;
break;
case PIN_CONFIG_BIAS_DISABLE:
*reg &= ~LPC18XX_SCU_USB1_EPD;
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
*reg |= LPC18XX_SCU_USB1_EPD;
break;
default:
dev_err(pctldev->dev, "Property not supported\n");
return -ENOTSUPP;
}
return 0;
}
static int lpc18xx_pconf_set_i2c0(struct pinctrl_dev *pctldev,
enum pin_config_param param,
u16 param_val, u32 *reg,
unsigned pin)
{
u8 shift;
if (pin == PIN_I2C0_SCL)
shift = LPC18XX_SCU_I2C0_SCL_SHIFT;
else
shift = LPC18XX_SCU_I2C0_SDA_SHIFT;
switch (param) {
case PIN_CONFIG_INPUT_ENABLE:
if (param_val)
*reg |= (LPC18XX_SCU_I2C0_EZI << shift);
else
*reg &= ~(LPC18XX_SCU_I2C0_EZI << shift);
break;
case PIN_CONFIG_SLEW_RATE:
if (param_val)
*reg |= (LPC18XX_SCU_I2C0_EHD << shift);
else
*reg &= ~(LPC18XX_SCU_I2C0_EHD << shift);
break;
case PIN_CONFIG_INPUT_SCHMITT:
if (param_val == 3)
*reg |= (LPC18XX_SCU_I2C0_EFP << shift);
else if (param_val == 50)
*reg &= ~(LPC18XX_SCU_I2C0_EFP << shift);
else
return -ENOTSUPP;
break;
case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
if (param_val)
*reg &= ~(LPC18XX_SCU_I2C0_ZIF << shift);
else
*reg |= (LPC18XX_SCU_I2C0_ZIF << shift);
break;
default:
dev_err(pctldev->dev, "Property not supported\n");
return -ENOTSUPP;
}
return 0;
}
static int lpc18xx_pconf_set_gpio_pin_int(struct pinctrl_dev *pctldev,
u16 param_val, unsigned pin)
{
struct lpc18xx_scu_data *scu = pinctrl_dev_get_drvdata(pctldev);
u32 val, reg_val, reg_offset = LPC18XX_SCU_PINTSEL0;
int gpio;
if (param_val >= LPC18XX_GPIO_PIN_INT_MAX)
return -EINVAL;
gpio = lpc18xx_pin_to_gpio(pctldev, pin);
if (gpio < 0)
return -ENOTSUPP;
val = lpc18xx_gpio_to_pintsel_val(gpio);
reg_offset += (param_val / LPC18XX_SCU_IRQ_PER_PINTSEL) * sizeof(u32);
reg_val = readl(scu->base + reg_offset);
reg_val &= ~LPC18XX_SCU_PINTSEL_VAL(LPC18XX_SCU_PINTSEL_VAL_MASK, param_val);
reg_val |= LPC18XX_SCU_PINTSEL_VAL(val, param_val);
writel(reg_val, scu->base + reg_offset);
return 0;
}
static int lpc18xx_pconf_set_pin(struct pinctrl_dev *pctldev, unsigned param,
u16 param_val, u32 *reg, unsigned pin,
struct lpc18xx_pin_caps *pin_cap)
{
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
*reg &= ~LPC18XX_SCU_PIN_EPD;
*reg |= LPC18XX_SCU_PIN_EPUN;
break;
case PIN_CONFIG_BIAS_PULL_UP:
*reg &= ~LPC18XX_SCU_PIN_EPUN;
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
*reg |= LPC18XX_SCU_PIN_EPD;
break;
case PIN_CONFIG_INPUT_ENABLE:
if (param_val)
*reg |= LPC18XX_SCU_PIN_EZI;
else
*reg &= ~LPC18XX_SCU_PIN_EZI;
break;
case PIN_CONFIG_SLEW_RATE:
if (pin_cap->type == TYPE_HD) {
dev_err(pctldev->dev, "Slew rate unsupported on high-drive pins\n");
return -ENOTSUPP;
}
if (param_val == 0)
*reg &= ~LPC18XX_SCU_PIN_EHS;
else
*reg |= LPC18XX_SCU_PIN_EHS;
break;
case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
if (param_val)
*reg &= ~LPC18XX_SCU_PIN_ZIF;
else
*reg |= LPC18XX_SCU_PIN_ZIF;
break;
case PIN_CONFIG_DRIVE_STRENGTH:
if (pin_cap->type != TYPE_HD) {
dev_err(pctldev->dev, "Drive strength available only on high-drive pins\n");
return -ENOTSUPP;
}
*reg &= ~LPC18XX_SCU_PIN_EHD_MASK;
switch (param_val) {
case 20: param_val -= 5;
case 14: param_val -= 5;
case 8: param_val -= 3;
case 4: param_val -= 4;
break;
default:
dev_err(pctldev->dev, "Drive strength %u unsupported\n", param_val);
return -ENOTSUPP;
}
*reg |= param_val << LPC18XX_SCU_PIN_EHD_POS;
break;
case PIN_CONFIG_GPIO_PIN_INT:
return lpc18xx_pconf_set_gpio_pin_int(pctldev, param_val, pin);
default:
dev_err(pctldev->dev, "Property not supported\n");
return -ENOTSUPP;
}
return 0;
}
static int lpc18xx_pconf_set(struct pinctrl_dev *pctldev, unsigned pin,
unsigned long *configs, unsigned num_configs)
{
struct lpc18xx_scu_data *scu = pinctrl_dev_get_drvdata(pctldev);
struct lpc18xx_pin_caps *pin_cap;
enum pin_config_param param;
u16 param_val;
u32 reg;
int ret;
int i;
pin_cap = lpc18xx_get_pin_caps(pin);
if (!pin_cap)
return -EINVAL;
reg = readl(scu->base + pin_cap->offset);
for (i = 0; i < num_configs; i++) {
param = pinconf_to_config_param(configs[i]);
param_val = pinconf_to_config_argument(configs[i]);
if (pin_cap->type == TYPE_I2C0)
ret = lpc18xx_pconf_set_i2c0(pctldev, param, param_val, &reg, pin);
else if (pin_cap->type == TYPE_USB1)
ret = lpc18xx_pconf_set_usb1(pctldev, param, param_val, &reg);
else
ret = lpc18xx_pconf_set_pin(pctldev, param, param_val, &reg, pin, pin_cap);
if (ret)
return ret;
}
writel(reg, scu->base + pin_cap->offset);
return 0;
}
static const struct pinconf_ops lpc18xx_pconf_ops = {
.is_generic = true,
.pin_config_get = lpc18xx_pconf_get,
.pin_config_set = lpc18xx_pconf_set,
};
static int lpc18xx_pmx_get_funcs_count(struct pinctrl_dev *pctldev)
{
return ARRAY_SIZE(lpc18xx_function_names);
}
static const char *lpc18xx_pmx_get_func_name(struct pinctrl_dev *pctldev,
unsigned function)
{
return lpc18xx_function_names[function];
}
static int lpc18xx_pmx_get_func_groups(struct pinctrl_dev *pctldev,
unsigned function,
const char *const **groups,
unsigned *const num_groups)
{
struct lpc18xx_scu_data *scu = pinctrl_dev_get_drvdata(pctldev);
*groups = scu->func[function].groups;
*num_groups = scu->func[function].ngroups;
return 0;
}
static int lpc18xx_pmx_set(struct pinctrl_dev *pctldev, unsigned function,
unsigned group)
{
struct lpc18xx_scu_data *scu = pinctrl_dev_get_drvdata(pctldev);
struct lpc18xx_pin_caps *pin = lpc18xx_pins[group].drv_data;
int func;
u32 reg;
/* Dedicated USB1 and I2C0 pins doesn't support muxing */
if (pin->type == TYPE_USB1) {
if (function == FUNC_USB1)
return 0;
goto fail;
}
if (pin->type == TYPE_I2C0) {
if (function == FUNC_I2C0)
return 0;
goto fail;
}
if (function == FUNC_ADC && (pin->analog & LPC18XX_ANALOG_PIN)) {
u32 offset;
writel(LPC18XX_SCU_ANALOG_PIN_CFG, scu->base + pin->offset);
if (LPC18XX_ANALOG_ADC(pin->analog) == 0)
offset = LPC18XX_SCU_REG_ENAIO0;
else
offset = LPC18XX_SCU_REG_ENAIO1;
reg = readl(scu->base + offset);
reg |= pin->analog & LPC18XX_ANALOG_BIT_MASK;
writel(reg, scu->base + offset);
return 0;
}
if (function == FUNC_DAC && (pin->analog & LPC18XX_ANALOG_PIN)) {
writel(LPC18XX_SCU_ANALOG_PIN_CFG, scu->base + pin->offset);
reg = readl(scu->base + LPC18XX_SCU_REG_ENAIO2);
reg |= LPC18XX_SCU_REG_ENAIO2_DAC;
writel(reg, scu->base + LPC18XX_SCU_REG_ENAIO2);
return 0;
}
for (func = 0; func < LPC18XX_SCU_FUNC_PER_PIN; func++) {
if (function == pin->functions[func])
break;
}
if (func >= LPC18XX_SCU_FUNC_PER_PIN)
goto fail;
reg = readl(scu->base + pin->offset);
reg &= ~LPC18XX_SCU_PIN_MODE_MASK;
writel(reg | func, scu->base + pin->offset);
return 0;
fail:
dev_err(pctldev->dev, "Pin %s can't be %s\n", lpc18xx_pins[group].name,
lpc18xx_function_names[function]);
return -EINVAL;
}
static const struct pinmux_ops lpc18xx_pmx_ops = {
.get_functions_count = lpc18xx_pmx_get_funcs_count,
.get_function_name = lpc18xx_pmx_get_func_name,
.get_function_groups = lpc18xx_pmx_get_func_groups,
.set_mux = lpc18xx_pmx_set,
};
static int lpc18xx_pctl_get_groups_count(struct pinctrl_dev *pctldev)
{
return ARRAY_SIZE(lpc18xx_pins);
}
static const char *lpc18xx_pctl_get_group_name(struct pinctrl_dev *pctldev,
unsigned group)
{
return lpc18xx_pins[group].name;
}
static int lpc18xx_pctl_get_group_pins(struct pinctrl_dev *pctldev,
unsigned group,
const unsigned **pins,
unsigned *num_pins)
{
*pins = &lpc18xx_pins[group].number;
*num_pins = 1;
return 0;
}
static const struct pinctrl_ops lpc18xx_pctl_ops = {
.get_groups_count = lpc18xx_pctl_get_groups_count,
.get_group_name = lpc18xx_pctl_get_group_name,
.get_group_pins = lpc18xx_pctl_get_group_pins,
.dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
.dt_free_map = pinctrl_utils_dt_free_map,
};
static struct pinctrl_desc lpc18xx_scu_desc = {
.name = "lpc18xx/43xx-scu",
.pins = lpc18xx_pins,
.npins = ARRAY_SIZE(lpc18xx_pins),
.pctlops = &lpc18xx_pctl_ops,
.pmxops = &lpc18xx_pmx_ops,
.confops = &lpc18xx_pconf_ops,
.num_custom_params = ARRAY_SIZE(lpc18xx_params),
.custom_params = lpc18xx_params,
#ifdef CONFIG_DEBUG_FS
.custom_conf_items = lpc18xx_conf_items,
#endif
.owner = THIS_MODULE,
};
static bool lpc18xx_valid_pin_function(unsigned pin, unsigned function)
{
struct lpc18xx_pin_caps *p = lpc18xx_pins[pin].drv_data;
int i;
if (function == FUNC_DAC && p->analog == DAC)
return true;
if (function == FUNC_ADC && p->analog)
return true;
if (function == FUNC_I2C0 && p->type == TYPE_I2C0)
return true;
if (function == FUNC_USB1 && p->type == TYPE_USB1)
return true;
for (i = 0; i < LPC18XX_SCU_FUNC_PER_PIN; i++) {
if (function == p->functions[i])
return true;
}
return false;
}
static int lpc18xx_create_group_func_map(struct device *dev,
struct lpc18xx_scu_data *scu)
{
u16 pins[ARRAY_SIZE(lpc18xx_pins)];
int func, ngroups, i;
for (func = 0; func < FUNC_MAX; func++) {
for (ngroups = 0, i = 0; i < ARRAY_SIZE(lpc18xx_pins); i++) {
if (lpc18xx_valid_pin_function(i, func))
pins[ngroups++] = i;
}
scu->func[func].ngroups = ngroups;
scu->func[func].groups = devm_kzalloc(dev, ngroups *
sizeof(char *), GFP_KERNEL);
if (!scu->func[func].groups)
return -ENOMEM;
for (i = 0; i < ngroups; i++)
scu->func[func].groups[i] = lpc18xx_pins[pins[i]].name;
}
return 0;
}
static int lpc18xx_scu_probe(struct platform_device *pdev)
{
struct lpc18xx_scu_data *scu;
struct resource *res;
int ret;
scu = devm_kzalloc(&pdev->dev, sizeof(*scu), GFP_KERNEL);
if (!scu)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
scu->base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(scu->base))
return PTR_ERR(scu->base);
scu->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(scu->clk)) {
dev_err(&pdev->dev, "Input clock not found.\n");
return PTR_ERR(scu->clk);
}
ret = lpc18xx_create_group_func_map(&pdev->dev, scu);
if (ret) {
dev_err(&pdev->dev, "Unable to create group func map.\n");
return ret;
}
ret = clk_prepare_enable(scu->clk);
if (ret) {
dev_err(&pdev->dev, "Unable to enable clock.\n");
return ret;
}
platform_set_drvdata(pdev, scu);
scu->pctl = pinctrl_register(&lpc18xx_scu_desc, &pdev->dev, scu);
if (IS_ERR(scu->pctl)) {
dev_err(&pdev->dev, "Could not register pinctrl driver\n");
clk_disable_unprepare(scu->clk);
return PTR_ERR(scu->pctl);
}
return 0;
}
static int lpc18xx_scu_remove(struct platform_device *pdev)
{
struct lpc18xx_scu_data *scu = platform_get_drvdata(pdev);
pinctrl_unregister(scu->pctl);
clk_disable_unprepare(scu->clk);
return 0;
}
static const struct of_device_id lpc18xx_scu_match[] = {
{ .compatible = "nxp,lpc1850-scu" },
{},
};
MODULE_DEVICE_TABLE(of, lpc18xx_scu_match);
static struct platform_driver lpc18xx_scu_driver = {
.probe = lpc18xx_scu_probe,
.remove = lpc18xx_scu_remove,
.driver = {
.name = "lpc18xx-scu",
.of_match_table = lpc18xx_scu_match,
},
};
module_platform_driver(lpc18xx_scu_driver);
MODULE_AUTHOR("Joachim Eastwood <manabian@gmail.com>");
MODULE_DESCRIPTION("Pinctrl driver for NXP LPC18xx/43xx SCU");
MODULE_LICENSE("GPL v2");
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