2 * Copyright (C) 2012 CERN (www.cern.ch)
3 * Author: Alessandro Rubini <rubini@gnudd.com>
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * The software is provided "as is"; the copyright holders disclaim
10 * all warranties and liabilities, to the extent permitted by
14 /* A trivial fmc driver that can load a gateware file and reports interrupts */
15 #include <linux/module.h>
16 #include <linux/init.h>
17 #include <linux/interrupt.h>
18 #include <linux/gpio.h>
19 #include <linux/fmc.h>
21 static struct fmc_driver t_drv; /* initialized later */
23 static irqreturn_t t_handler(int irq, void *dev_id)
25 struct fmc_device *fmc = dev_id;
28 dev_info(&fmc->dev, "received irq %i\n", irq);
32 static struct fmc_gpio t_gpio[] = {
34 .gpio = FMC_GPIO_IRQ(0),
36 .irqmode = IRQF_TRIGGER_RISING,
38 .gpio = FMC_GPIO_IRQ(1),
40 .irqmode = IRQF_TRIGGER_RISING,
44 static int t_probe(struct fmc_device *fmc)
49 index = fmc_validate(fmc, &t_drv);
51 return -EINVAL; /* not our device: invalid */
53 ret = fmc_irq_request(fmc, t_handler, "fmc-trivial", IRQF_SHARED);
56 /* ignore error code of call below, we really don't care */
57 fmc_gpio_config(fmc, t_gpio, ARRAY_SIZE(t_gpio));
59 ret = fmc_reprogram(fmc, &t_drv, "", 0);
60 if (ret == -EPERM) /* programming not supported */
65 /* FIXME: reprogram LM32 too */
69 static int t_remove(struct fmc_device *fmc)
75 static struct fmc_driver t_drv = {
76 .version = FMC_VERSION,
77 .driver.name = KBUILD_MODNAME,
80 /* no table, as the current match just matches everything */
83 /* We accept the generic parameters */
84 FMC_PARAM_BUSID(t_drv);
85 FMC_PARAM_GATEWARE(t_drv);
87 static int t_init(void)
91 ret = fmc_driver_register(&t_drv);
95 static void t_exit(void)
97 fmc_driver_unregister(&t_drv);
103 MODULE_LICENSE("Dual BSD/GPL");