43620a1794
Add core MFD driver for the on-board PLD found on some Kontron embedded modules. The PLD device may provide functions like watchdog, GPIO, UART and I2C bus. The following modules are supported: * COMe-bIP# * COMe-bPC2 (ETXexpress-PC) * COMe-bSC# (ETXexpress-SC T#) * COMe-cCT6 * COMe-cDC2 (microETXexpress-DC) * COMe-cPC2 (microETXexpress-PC) * COMe-mCT10 * ETX-OH Originally-From: Michael Brunner <michael.brunner@kontron.com> Signed-off-by: Kevin Strasser <kevin.strasser@linux.intel.com> Acked-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Darren Hart <dvhart@linux.intel.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
125 lines
4.1 KiB
C
125 lines
4.1 KiB
C
/*
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* Kontron PLD driver definitions
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*
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* Copyright (c) 2010-2012 Kontron Europe GmbH
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* Author: Michael Brunner <michael.brunner@kontron.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License 2 as published
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* by the Free Software Foundation.
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*/
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#ifndef _LINUX_MFD_KEMPLD_H_
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#define _LINUX_MFD_KEMPLD_H_
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/* kempld register definitions */
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#define KEMPLD_IOINDEX 0xa80
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#define KEMPLD_IODATA 0xa81
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#define KEMPLD_MUTEX_KEY 0x80
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#define KEMPLD_VERSION 0x00
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#define KEMPLD_VERSION_LSB 0x00
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#define KEMPLD_VERSION_MSB 0x01
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#define KEMPLD_VERSION_GET_MINOR(x) (x & 0x1f)
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#define KEMPLD_VERSION_GET_MAJOR(x) ((x >> 5) & 0x1f)
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#define KEMPLD_VERSION_GET_NUMBER(x) ((x >> 10) & 0xf)
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#define KEMPLD_VERSION_GET_TYPE(x) ((x >> 14) & 0x3)
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#define KEMPLD_BUILDNR 0x02
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#define KEMPLD_BUILDNR_LSB 0x02
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#define KEMPLD_BUILDNR_MSB 0x03
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#define KEMPLD_FEATURE 0x04
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#define KEMPLD_FEATURE_LSB 0x04
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#define KEMPLD_FEATURE_MSB 0x05
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#define KEMPLD_FEATURE_BIT_I2C (1 << 0)
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#define KEMPLD_FEATURE_BIT_WATCHDOG (1 << 1)
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#define KEMPLD_FEATURE_BIT_GPIO (1 << 2)
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#define KEMPLD_FEATURE_MASK_UART (7 << 3)
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#define KEMPLD_FEATURE_BIT_NMI (1 << 8)
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#define KEMPLD_FEATURE_BIT_SMI (1 << 9)
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#define KEMPLD_FEATURE_BIT_SCI (1 << 10)
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#define KEMPLD_SPEC 0x06
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#define KEMPLD_SPEC_GET_MINOR(x) (x & 0x0f)
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#define KEMPLD_SPEC_GET_MAJOR(x) ((x >> 4) & 0x0f)
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#define KEMPLD_IRQ_GPIO 0x35
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#define KEMPLD_IRQ_I2C 0x36
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#define KEMPLD_CFG 0x37
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#define KEMPLD_CFG_GPIO_I2C_MUX (1 << 0)
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#define KEMPLD_CFG_BIOS_WP (1 << 7)
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#define KEMPLD_CLK 33333333
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#define KEMPLD_TYPE_RELEASE 0x0
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#define KEMPLD_TYPE_DEBUG 0x1
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#define KEMPLD_TYPE_CUSTOM 0x2
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/**
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* struct kempld_info - PLD device information structure
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* @major: PLD major revision
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* @minor: PLD minor revision
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* @buildnr: PLD build number
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* @number: PLD board specific index
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* @type: PLD type
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* @spec_major: PLD FW specification major revision
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* @spec_minor: PLD FW specification minor revision
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*/
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struct kempld_info {
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unsigned int major;
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unsigned int minor;
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unsigned int buildnr;
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unsigned int number;
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unsigned int type;
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unsigned int spec_major;
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unsigned int spec_minor;
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};
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/**
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* struct kempld_device_data - Internal representation of the PLD device
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* @io_base: Pointer to the IO memory
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* @io_index: Pointer to the IO index register
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* @io_data: Pointer to the IO data register
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* @pld_clock: PLD clock frequency
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* @feature_mask: PLD feature mask
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* @dev: Pointer to kernel device structure
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* @info: KEMPLD info structure
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* @lock: PLD mutex
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*/
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struct kempld_device_data {
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void __iomem *io_base;
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void __iomem *io_index;
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void __iomem *io_data;
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u32 pld_clock;
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u32 feature_mask;
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struct device *dev;
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struct kempld_info info;
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struct mutex lock;
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};
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/**
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* struct kempld_platform_data - PLD hardware configuration structure
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* @pld_clock: PLD clock frequency
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* @gpio_base GPIO base pin number
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* @ioresource: IO addresses of the PLD
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* @get_mutex: PLD specific get_mutex callback
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* @release_mutex: PLD specific release_mutex callback
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* @get_info: PLD specific get_info callback
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* @register_cells: PLD specific register_cells callback
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*/
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struct kempld_platform_data {
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u32 pld_clock;
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int gpio_base;
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struct resource *ioresource;
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void (*get_hardware_mutex) (struct kempld_device_data *);
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void (*release_hardware_mutex) (struct kempld_device_data *);
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int (*get_info) (struct kempld_device_data *);
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int (*register_cells) (struct kempld_device_data *);
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};
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extern void kempld_get_mutex(struct kempld_device_data *pld);
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extern void kempld_release_mutex(struct kempld_device_data *pld);
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extern u8 kempld_read8(struct kempld_device_data *pld, u8 index);
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extern void kempld_write8(struct kempld_device_data *pld, u8 index, u8 data);
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extern u16 kempld_read16(struct kempld_device_data *pld, u8 index);
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extern void kempld_write16(struct kempld_device_data *pld, u8 index, u16 data);
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extern u32 kempld_read32(struct kempld_device_data *pld, u8 index);
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extern void kempld_write32(struct kempld_device_data *pld, u8 index, u32 data);
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#endif /* _LINUX_MFD_KEMPLD_H_ */
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