516fbeb0ac
git-svn-id: svn://svn.openwrt.org/openwrt/packages@14839 3c298f89-4303-0410-b956-a3cf2f4a3e73
78 lines
2.3 KiB
C
78 lines
2.3 KiB
C
#ifndef LINUX_UCMB_H_
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#define LINUX_UCMB_H_
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#include <linux/types.h>
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#include <linux/ioctl.h>
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/* IOCTLs */
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#define __UCMB_IOCTL ('U'|'C'|'M'|'B')
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/** UCMB_IOCTL_RESETUC - Reset the microcontroller. */
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#define UCMB_IOCTL_RESETUC _IO(__UCMB_IOCTL, 0)
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/** UCMB_IOCTL_GMSGDELAY - Get the delay to wait before fetching the status. */
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#define UCMB_IOCTL_GMSGDELAY _IOR(__UCMB_IOCTL, 1, unsigned int)
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/** UCMB_IOCTL_SMSGDELAY - Set the delay to wait before fetching the status. */
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#define UCMB_IOCTL_SMSGDELAY _IOW(__UCMB_IOCTL, 2, unsigned int)
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#ifdef __KERNEL__
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#include <linux/device.h>
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#include <linux/spi/spi.h>
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#include <linux/spi/spi_gpio.h>
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/**
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* struct ucmb_platform_data - UCMB device descriptor
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*
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* @name: The name of the device. This will also be the name of
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* the misc char device.
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*
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* @gpio_cs: The chipselect GPIO pin. Can be SPI_GPIO_NO_CHIPSELECT,
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* if chipselect is not used.
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* @gpio_sck: The clock GPIO pin.
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* @gpio_miso: The master-in slave-out GPIO pin.
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* @gpio_mosi: The master-out slave-in GPIO pin.
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*
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* @gpio_reset: The GPIO pin to the microcontroller reset line.
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* Can be UCMB_NO_RESET, if reset GPIO is not used.
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* @reset_activelow: If true, @gpio_reset is considered to be active
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* on logical 0 (inverted).
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*
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* @mode: The SPI bus mode. SPI_MODE_*
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* @max_speed_hz: The bus speed, in Hz. If zero the speed is not limited.
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* @chunk_size: The maximum chunk size to transmit/receive in one go
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* without sleeping. The kernel will be allowed to sleep
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* after each chunk.
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* If set to 0, the whole data will be transmitted/received
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* in one big rush without sleeping. Note that this might hurt
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* system responsiveness, if the kernel is not preemptible.
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* If CONFIG_PREEMPT is enabled, chunk_size will be forced to 0.
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*/
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struct ucmb_platform_data {
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const char *name;
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unsigned long gpio_cs;
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unsigned int gpio_sck;
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unsigned int gpio_miso;
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unsigned int gpio_mosi;
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unsigned int gpio_reset;
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bool reset_activelow;
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u8 mode;
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u32 max_speed_hz;
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unsigned int chunk_size;
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struct platform_device *pdev; /* internal */
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};
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#define UCMB_NO_RESET ((unsigned int)-1)
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int ucmb_device_register(struct ucmb_platform_data *pdata);
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void ucmb_device_unregister(struct ucmb_platform_data *pdata);
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#endif /* __KERNEL__ */
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#endif /* LINUX_UCMB_H_ */
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