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Diffstat (limited to 'arch/cris/include/uapi/asm/etraxgpio.h')
| -rw-r--r-- | arch/cris/include/uapi/asm/etraxgpio.h | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/arch/cris/include/uapi/asm/etraxgpio.h b/arch/cris/include/uapi/asm/etraxgpio.h new file mode 100644 index 00000000000..461c089db76 --- /dev/null +++ b/arch/cris/include/uapi/asm/etraxgpio.h @@ -0,0 +1,239 @@ +/* + * The following devices are accessible using this driver using + * GPIO_MAJOR (120) and a couple of minor numbers. + * + * For ETRAX 100LX (CONFIG_ETRAX_ARCH_V10): + * /dev/gpioa minor 0, 8 bit GPIO, each bit can change direction + * /dev/gpiob minor 1, 8 bit GPIO, each bit can change direction + * /dev/leds minor 2, Access to leds depending on kernelconfig + * /dev/gpiog minor 3 + * g0dir, g8_15dir, g16_23dir, g24 dir configurable in R_GEN_CONFIG + * g1-g7 and g25-g31 is both input and outputs but on different pins + * Also note that some bits change pins depending on what interfaces + * are enabled. + * + * For ETRAX FS (CONFIG_ETRAXFS): + * /dev/gpioa minor 0, 8 bit GPIO, each bit can change direction + * /dev/gpiob minor 1, 18 bit GPIO, each bit can change direction + * /dev/gpioc minor 3, 18 bit GPIO, each bit can change direction + * /dev/gpiod minor 4, 18 bit GPIO, each bit can change direction + * /dev/gpioe minor 5, 18 bit GPIO, each bit can change direction + * /dev/leds minor 2, Access to leds depending on kernelconfig + * + * For ARTPEC-3 (CONFIG_CRIS_MACH_ARTPEC3): + * /dev/gpioa minor 0, 32 bit GPIO, each bit can change direction + * /dev/gpiob minor 1, 32 bit GPIO, each bit can change direction + * /dev/gpioc minor 3, 16 bit GPIO, each bit can change direction + * /dev/gpiod minor 4, 32 bit GPIO, input only + * /dev/leds minor 2, Access to leds depending on kernelconfig + * /dev/pwm0 minor 16, PWM channel 0 on PA30 + * /dev/pwm1 minor 17, PWM channel 1 on PA31 + * /dev/pwm2 minor 18, PWM channel 2 on PB26 + * /dev/ppwm minor 19, PPWM channel + * + */ +#ifndef _ASM_ETRAXGPIO_H +#define _ASM_ETRAXGPIO_H + +#define GPIO_MINOR_FIRST 0 + +#define ETRAXGPIO_IOCTYPE 43 + +/* etraxgpio _IOC_TYPE, bits 8 to 15 in ioctl cmd */ +#ifdef CONFIG_ETRAX_ARCH_V10 +#define GPIO_MINOR_A 0 +#define GPIO_MINOR_B 1 +#define GPIO_MINOR_LEDS 2 +#define GPIO_MINOR_G 3 +#define GPIO_MINOR_LAST 3 +#define GPIO_MINOR_LAST_REAL GPIO_MINOR_LAST +#endif + +#ifdef CONFIG_ETRAXFS +#define GPIO_MINOR_A 0 +#define GPIO_MINOR_B 1 +#define GPIO_MINOR_LEDS 2 +#define GPIO_MINOR_C 3 +#define GPIO_MINOR_D 4 +#define GPIO_MINOR_E 5 +#ifdef CONFIG_ETRAX_VIRTUAL_GPIO +#define GPIO_MINOR_V 6 +#define GPIO_MINOR_LAST 6 +#else +#define GPIO_MINOR_LAST 5 +#endif +#define GPIO_MINOR_LAST_REAL GPIO_MINOR_LAST +#endif + +#ifdef CONFIG_CRIS_MACH_ARTPEC3 +#define GPIO_MINOR_A 0 +#define GPIO_MINOR_B 1 +#define GPIO_MINOR_LEDS 2 +#define GPIO_MINOR_C 3 +#define GPIO_MINOR_D 4 +#ifdef CONFIG_ETRAX_VIRTUAL_GPIO +#define GPIO_MINOR_V 6 +#define GPIO_MINOR_LAST 6 +#else +#define GPIO_MINOR_LAST 4 +#endif +#define GPIO_MINOR_FIRST_PWM 16 +#define GPIO_MINOR_PWM0 (GPIO_MINOR_FIRST_PWM+0) +#define GPIO_MINOR_PWM1 (GPIO_MINOR_FIRST_PWM+1) +#define GPIO_MINOR_PWM2 (GPIO_MINOR_FIRST_PWM+2) +#define GPIO_MINOR_PPWM (GPIO_MINOR_FIRST_PWM+3) +#define GPIO_MINOR_LAST_PWM GPIO_MINOR_PPWM +#define GPIO_MINOR_LAST_REAL GPIO_MINOR_LAST_PWM +#endif + + + +/* supported ioctl _IOC_NR's */ + +#define IO_READBITS 0x1 /* read and return current port bits (obsolete) */ +#define IO_SETBITS 0x2 /* set the bits marked by 1 in the argument */ +#define IO_CLRBITS 0x3 /* clear the bits marked by 1 in the argument */ + +/* the alarm is waited for by select() */ + +#define IO_HIGHALARM 0x4 /* set alarm on high for bits marked by 1 */ +#define IO_LOWALARM 0x5 /* set alarm on low for bits marked by 1 */ +#define IO_CLRALARM 0x6 /* clear alarm for bits marked by 1 */ + +/* LED ioctl */ +#define IO_LEDACTIVE_SET 0x7 /* set active led + * 0=off, 1=green, 2=red, 3=yellow */ + +/* GPIO direction ioctl's */ +#define IO_READDIR 0x8 /* Read direction 0=input 1=output (obsolete) */ +#define IO_SETINPUT 0x9 /* Set direction for bits set, 0=unchanged 1=input, + returns mask with current inputs (obsolete) */ +#define IO_SETOUTPUT 0xA /* Set direction for bits set, 0=unchanged 1=output, + returns mask with current outputs (obsolete)*/ + +/* LED ioctl extended */ +#define IO_LED_SETBIT 0xB +#define IO_LED_CLRBIT 0xC + +/* SHUTDOWN ioctl */ +#define IO_SHUTDOWN 0xD +#define IO_GET_PWR_BT 0xE + +/* Bit toggling in driver settings */ +/* bit set in low byte0 is CLK mask (0x00FF), + bit set in byte1 is DATA mask (0xFF00) + msb, data_mask[7:0] , clk_mask[7:0] + */ +#define IO_CFG_WRITE_MODE 0xF +#define IO_CFG_WRITE_MODE_VALUE(msb, data_mask, clk_mask) \ + ( (((msb)&1) << 16) | (((data_mask) &0xFF) << 8) | ((clk_mask) & 0xFF) ) + +/* The following 4 ioctl's take a pointer as argument and handles + * 32 bit ports (port G) properly. + * These replaces IO_READBITS,IO_SETINPUT AND IO_SETOUTPUT + */ +#define IO_READ_INBITS 0x10 /* *arg is result of reading the input pins */ +#define IO_READ_OUTBITS 0x11 /* *arg is result of reading the output shadow */ +#define IO_SETGET_INPUT 0x12 /* bits set in *arg is set to input, */ + /* *arg updated with current input pins. */ +#define IO_SETGET_OUTPUT 0x13 /* bits set in *arg is set to output, */ + /* *arg updated with current output pins. */ + +/* The following ioctl's are applicable to the PWM channels only */ + +#define IO_PWM_SET_MODE 0x20 + +enum io_pwm_mode { + PWM_OFF = 0, /* disabled, deallocated */ + PWM_STANDARD = 1, /* 390 kHz, duty cycle 0..255/256 */ + PWM_FAST = 2, /* variable freq, w/ 10ns active pulse len */ + PWM_VARFREQ = 3, /* individually configurable high/low periods */ + PWM_SOFT = 4 /* software generated */ +}; + +struct io_pwm_set_mode { + enum io_pwm_mode mode; +}; + +/* Only for mode PWM_VARFREQ. Period lo/high set in increments of 10ns + * from 10ns (value = 0) to 81920ns (value = 8191) + * (Resulting frequencies range from 50 MHz (10ns + 10ns) down to + * 6.1 kHz (81920ns + 81920ns) at 50% duty cycle, to 12.2 kHz at min/max duty + * cycle (81920 + 10ns or 10ns + 81920ns, respectively).) + */ +#define IO_PWM_SET_PERIOD 0x21 + +struct io_pwm_set_period { + unsigned int lo; /* 0..8191 */ + unsigned int hi; /* 0..8191 */ +}; + +/* Only for modes PWM_STANDARD and PWM_FAST. + * For PWM_STANDARD, set duty cycle of 390 kHz PWM output signal, from + * 0 (value = 0) to 255/256 (value = 255). + * For PWM_FAST, set duty cycle of PWM output signal from + * 0% (value = 0) to 100% (value = 255). Output signal in this mode + * is a 10ns pulse surrounded by a high or low level depending on duty + * cycle (except for 0% and 100% which result in a constant output). + * Resulting output frequency varies from 50 MHz at 50% duty cycle, + * down to 390 kHz at min/max duty cycle. + */ +#define IO_PWM_SET_DUTY 0x22 + +struct io_pwm_set_duty { + int duty; /* 0..255 */ +}; + +/* Returns information about the latest PWM pulse. + * lo: Length of the latest low period, in units of 10ns. + * hi: Length of the latest high period, in units of 10ns. + * cnt: Time since last detected edge, in units of 10ns. + * + * The input source to PWM is decied by IO_PWM_SET_INPUT_SRC. + * + * NOTE: All PWM devices is connected to the same input source. + */ +#define IO_PWM_GET_PERIOD 0x23 + +struct io_pwm_get_period { + unsigned int lo; + unsigned int hi; + unsigned int cnt; +}; + +/* Sets the input source for the PWM input. For the src value see the + * register description for gio:rw_pwm_in_cfg. + * + * NOTE: All PWM devices is connected to the same input source. + */ +#define IO_PWM_SET_INPUT_SRC 0x24 +struct io_pwm_set_input_src { + unsigned int src; /* 0..7 */ +}; + +/* Sets the duty cycles in steps of 1/256, 0 = 0%, 255 = 100% duty cycle */ +#define IO_PPWM_SET_DUTY 0x25 + +struct io_ppwm_set_duty { + int duty; /* 0..255 */ +}; + +/* Configuraton struct for the IO_PWMCLK_SET_CONFIG ioctl to configure + * PWM capable gpio pins: + */ +#define IO_PWMCLK_SETGET_CONFIG 0x26 +struct gpio_pwmclk_conf { + unsigned int gpiopin; /* The pin number based on the opened device */ + unsigned int baseclk; /* The base clock to use, or sw will select one close*/ + unsigned int low; /* The number of low periods of the baseclk */ + unsigned int high; /* The number of high periods of the baseclk */ +}; + +/* Examples: + * To get a symmetric 12 MHz clock without knowing anything about the hardware: + * baseclk = 12000000, low = 0, high = 0 + * To just get info of current setting: + * baseclk = 0, low = 0, high = 0, the values will be updated by driver. + */ + +#endif |