linux-imx

/*

 * GPIO driver for AMD 8111 south bridges

 *

 * Copyright (c) 2012 Dmitry Eremin-Solenikov

 *

 * Based on the AMD RNG driver:

 * Copyright 2005 (c) MontaVista Software, Inc.

 * with the majority of the code coming from:

 *

 * Hardware driver for the Intel/AMD/VIA Random Number Generators (RNG)

 * (c) Copyright 2003 Red Hat Inc <jgarzik@redhat.com>

 *

 * derived from

 *

 * Hardware driver for the AMD 768 Random Number Generator (RNG)

 * (c) Copyright 2001 Red Hat Inc

 *

 * derived from

 *

 * Hardware driver for Intel i810 Random Number Generator (RNG)

 * Copyright 2000,2001 Jeff Garzik <jgarzik@pobox.com>

 * Copyright 2000,2001 Philipp Rumpf <prumpf@mandrakesoft.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/ioport.h>

#include <linux/module.h>

#include <linux/kernel.h>

#include <linux/gpio/driver.h>

#include <linux/pci.h>

#include <linux/spinlock.h>

​

#define PMBASE_OFFSET 0xb0

#define PMBASE_SIZE   0x30

​

#define AMD_REG_GPIO(i) (0x10 + (i))

​

#define AMD_GPIO_LTCH_STS   0x40 /* Latch status, w1 */

#define AMD_GPIO_RTIN       0x20 /* Real Time in, ro */

#define AMD_GPIO_DEBOUNCE   0x10 /* Debounce, rw */

#define AMD_GPIO_MODE_MASK  0x0c /* Pin Mode Select, rw */

#define AMD_GPIO_MODE_IN    0x00

#define AMD_GPIO_MODE_OUT   0x04

/* Enable alternative (e.g. clkout, IRQ, etc) function of the pin */

#define AMD_GPIO_MODE_ALTFN 0x08 /* Or 0x09 */

#define AMD_GPIO_X_MASK     0x03 /* In/Out specific, rw */

#define AMD_GPIO_X_IN_ACTIVEHI  0x01 /* Active High */

#define AMD_GPIO_X_IN_LATCH 0x02 /* Latched version is selected */

#define AMD_GPIO_X_OUT_LOW  0x00

#define AMD_GPIO_X_OUT_HI   0x01

#define AMD_GPIO_X_OUT_CLK0 0x02

#define AMD_GPIO_X_OUT_CLK1 0x03

​

/*

 * Data for PCI driver interface

 *

 * This data only exists for exporting the supported

 * PCI ids via MODULE_DEVICE_TABLE.  We do not actually

 * register a pci_driver, because someone else might one day

 * want to register another driver on the same PCI id.

 */