utils/ucmb/driver/ucmb.h

   1 #ifndef LINUX_UCMB_H_
   2 #define LINUX_UCMB_H_
   3
   4 #include <linux/types.h>
   5 #include <linux/ioctl.h>
   6
   7
   8 /* IOCTLs */
   9 #define __UCMB_IOCTL            ('U'|'C'|'M'|'B')
  10
  11 /** UCMB_IOCTL_RESETUC - Reset the microcontroller. */
  12 #define UCMB_IOCTL_RESETUC      _IO(__UCMB_IOCTL, 0)
  13
  14
  15 #ifdef __KERNEL__
  16
  17 /**
  18  * struct ucmb_platform_data - UCMB device descriptor
  19  *
  20  * @name:               The name of the device. This will also be the name of
  21  *                      the misc char device.
  22  *
  23  * @gpio_cs:            The chipselect GPIO pin. Can be SPI_GPIO_NO_CHIPSELECT,
  24  *                      if chipselect is not used.
  25  * @gpio_sck:           The clock GPIO pin.
  26  * @gpio_miso:          The master-in slave-out GPIO pin.
  27  * @gpio_mosi:          The master-out slave-in GPIO pin.
  28  *
  29  * @gpio_reset:         The GPIO pin to the microcontroller reset line.
  30  *                      Can be UCMB_NO_RESET, if reset GPIO is not used.
  31  * @reset_activelow:    If true, @gpio_reset is considered to be active
  32  *                      on logical 0 (inverted).
  33  *
  34  * @mode:               The SPI bus mode. SPI_MODE_*
  35  * @max_speed_hz:       The bus speed, in Hz. If zero the speed is not limited.
  36  * @msg_delay_ms:       The message delay time, in milliseconds.
  37  *                      This is the time the microcontroller takes to process
  38  *                      one message.
  39  */
  40 struct ucmb_platform_data {
  41         const char *name;
  42
  43         unsigned long gpio_cs;
  44         unsigned int gpio_sck;
  45         unsigned int gpio_miso;
  46         unsigned int gpio_mosi;
  47
  48         unsigned int gpio_reset;
  49         bool reset_activelow;
  50
  51         u8 mode;
  52         u32 max_speed_hz;
  53         unsigned int msg_delay_ms;
  54
  55         struct platform_device *pdev; /* internal */
  56 };
  57
  58 #define UCMB_NO_RESET           ((unsigned int)-1)
  59
  60
  61 #endif /* __KERNEL__ */
  62 #endif /* LINUX_UCMB_H_ */