linux/drivers/pcmcia/electra_cf.c
Thomas Gleixner 1a59d1b8e0 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version this program is distributed in the
  hope that it will be useful but without any warranty without even
  the implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details you
  should have received a copy of the gnu general public license along
  with this program if not write to the free software foundation inc
  59 temple place suite 330 boston ma 02111 1307 usa

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1334 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:35 -07:00

366 lines
7.9 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2007 PA Semi, Inc
*
* Maintained by: Olof Johansson <olof@lixom.net>
*
* Based on drivers/pcmcia/omap_cf.c
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/platform_device.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/mm.h>
#include <linux/vmalloc.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/slab.h>
#include <pcmcia/ss.h>
static const char driver_name[] = "electra-cf";
struct electra_cf_socket {
struct pcmcia_socket socket;
struct timer_list timer;
unsigned present:1;
unsigned active:1;
struct platform_device *ofdev;
unsigned long mem_phys;
void __iomem *mem_base;
unsigned long mem_size;
void __iomem *io_virt;
unsigned int io_base;
unsigned int io_size;
u_int irq;
struct resource iomem;
void __iomem *gpio_base;
int gpio_detect;
int gpio_vsense;
int gpio_3v;
int gpio_5v;
};
#define POLL_INTERVAL (2 * HZ)
static int electra_cf_present(struct electra_cf_socket *cf)
{
unsigned int gpio;
gpio = in_le32(cf->gpio_base+0x40);
return !(gpio & (1 << cf->gpio_detect));
}
static int electra_cf_ss_init(struct pcmcia_socket *s)
{
return 0;
}
/* the timer is primarily to kick this socket's pccardd */
static void electra_cf_timer(struct timer_list *t)
{
struct electra_cf_socket *cf = from_timer(cf, t, timer);
int present = electra_cf_present(cf);
if (present != cf->present) {
cf->present = present;
pcmcia_parse_events(&cf->socket, SS_DETECT);
}
if (cf->active)
mod_timer(&cf->timer, jiffies + POLL_INTERVAL);
}
static irqreturn_t electra_cf_irq(int irq, void *_cf)
{
struct electra_cf_socket *cf = _cf;
electra_cf_timer(&cf->timer);
return IRQ_HANDLED;
}
static int electra_cf_get_status(struct pcmcia_socket *s, u_int *sp)
{
struct electra_cf_socket *cf;
if (!sp)
return -EINVAL;
cf = container_of(s, struct electra_cf_socket, socket);
/* NOTE CF is always 3VCARD */
if (electra_cf_present(cf)) {
*sp = SS_READY | SS_DETECT | SS_POWERON | SS_3VCARD;
s->pci_irq = cf->irq;
} else
*sp = 0;
return 0;
}
static int electra_cf_set_socket(struct pcmcia_socket *sock,
struct socket_state_t *s)
{
unsigned int gpio;
unsigned int vcc;
struct electra_cf_socket *cf;
cf = container_of(sock, struct electra_cf_socket, socket);
/* "reset" means no power in our case */
vcc = (s->flags & SS_RESET) ? 0 : s->Vcc;
switch (vcc) {
case 0:
gpio = 0;
break;
case 33:
gpio = (1 << cf->gpio_3v);
break;
case 5:
gpio = (1 << cf->gpio_5v);
break;
default:
return -EINVAL;
}
gpio |= 1 << (cf->gpio_3v + 16); /* enwr */
gpio |= 1 << (cf->gpio_5v + 16); /* enwr */
out_le32(cf->gpio_base+0x90, gpio);
pr_debug("%s: Vcc %d, io_irq %d, flags %04x csc %04x\n",
driver_name, s->Vcc, s->io_irq, s->flags, s->csc_mask);
return 0;
}
static int electra_cf_set_io_map(struct pcmcia_socket *s,
struct pccard_io_map *io)
{
return 0;
}
static int electra_cf_set_mem_map(struct pcmcia_socket *s,
struct pccard_mem_map *map)
{
struct electra_cf_socket *cf;
if (map->card_start)
return -EINVAL;
cf = container_of(s, struct electra_cf_socket, socket);
map->static_start = cf->mem_phys;
map->flags &= MAP_ACTIVE|MAP_ATTRIB;
if (!(map->flags & MAP_ATTRIB))
map->static_start += 0x800;
return 0;
}
static struct pccard_operations electra_cf_ops = {
.init = electra_cf_ss_init,
.get_status = electra_cf_get_status,
.set_socket = electra_cf_set_socket,
.set_io_map = electra_cf_set_io_map,
.set_mem_map = electra_cf_set_mem_map,
};
static int electra_cf_probe(struct platform_device *ofdev)
{
struct device *device = &ofdev->dev;
struct device_node *np = ofdev->dev.of_node;
struct electra_cf_socket *cf;
struct resource mem, io;
int status;
const unsigned int *prop;
int err;
struct vm_struct *area;
err = of_address_to_resource(np, 0, &mem);
if (err)
return -EINVAL;
err = of_address_to_resource(np, 1, &io);
if (err)
return -EINVAL;
cf = kzalloc(sizeof(*cf), GFP_KERNEL);
if (!cf)
return -ENOMEM;
timer_setup(&cf->timer, electra_cf_timer, 0);
cf->irq = 0;
cf->ofdev = ofdev;
cf->mem_phys = mem.start;
cf->mem_size = PAGE_ALIGN(resource_size(&mem));
cf->mem_base = ioremap(cf->mem_phys, cf->mem_size);
cf->io_size = PAGE_ALIGN(resource_size(&io));
area = __get_vm_area(cf->io_size, 0, PHB_IO_BASE, PHB_IO_END);
if (area == NULL) {
status = -ENOMEM;
goto fail1;
}
cf->io_virt = (void __iomem *)(area->addr);
cf->gpio_base = ioremap(0xfc103000, 0x1000);
dev_set_drvdata(device, cf);
if (!cf->mem_base || !cf->io_virt || !cf->gpio_base ||
(__ioremap_at(io.start, cf->io_virt, cf->io_size,
pgprot_noncached(PAGE_KERNEL)) == NULL)) {
dev_err(device, "can't ioremap ranges\n");
status = -ENOMEM;
goto fail1;
}
cf->io_base = (unsigned long)cf->io_virt - VMALLOC_END;
cf->iomem.start = (unsigned long)cf->mem_base;
cf->iomem.end = (unsigned long)cf->mem_base + (mem.end - mem.start);
cf->iomem.flags = IORESOURCE_MEM;
cf->irq = irq_of_parse_and_map(np, 0);
status = request_irq(cf->irq, electra_cf_irq, IRQF_SHARED,
driver_name, cf);
if (status < 0) {
dev_err(device, "request_irq failed\n");
goto fail1;
}
cf->socket.pci_irq = cf->irq;
prop = of_get_property(np, "card-detect-gpio", NULL);
if (!prop)
goto fail1;
cf->gpio_detect = *prop;
prop = of_get_property(np, "card-vsense-gpio", NULL);
if (!prop)
goto fail1;
cf->gpio_vsense = *prop;
prop = of_get_property(np, "card-3v-gpio", NULL);
if (!prop)
goto fail1;
cf->gpio_3v = *prop;
prop = of_get_property(np, "card-5v-gpio", NULL);
if (!prop)
goto fail1;
cf->gpio_5v = *prop;
cf->socket.io_offset = cf->io_base;
/* reserve chip-select regions */
if (!request_mem_region(cf->mem_phys, cf->mem_size, driver_name)) {
status = -ENXIO;
dev_err(device, "Can't claim memory region\n");
goto fail1;
}
if (!request_region(cf->io_base, cf->io_size, driver_name)) {
status = -ENXIO;
dev_err(device, "Can't claim I/O region\n");
goto fail2;
}
cf->socket.owner = THIS_MODULE;
cf->socket.dev.parent = &ofdev->dev;
cf->socket.ops = &electra_cf_ops;
cf->socket.resource_ops = &pccard_static_ops;
cf->socket.features = SS_CAP_PCCARD | SS_CAP_STATIC_MAP |
SS_CAP_MEM_ALIGN;
cf->socket.map_size = 0x800;
status = pcmcia_register_socket(&cf->socket);
if (status < 0) {
dev_err(device, "pcmcia_register_socket failed\n");
goto fail3;
}
dev_info(device, "at mem 0x%lx io 0x%llx irq %d\n",
cf->mem_phys, io.start, cf->irq);
cf->active = 1;
electra_cf_timer(&cf->timer);
return 0;
fail3:
release_region(cf->io_base, cf->io_size);
fail2:
release_mem_region(cf->mem_phys, cf->mem_size);
fail1:
if (cf->irq)
free_irq(cf->irq, cf);
if (cf->io_virt)
__iounmap_at(cf->io_virt, cf->io_size);
if (cf->mem_base)
iounmap(cf->mem_base);
if (cf->gpio_base)
iounmap(cf->gpio_base);
if (area)
device_init_wakeup(&ofdev->dev, 0);
kfree(cf);
return status;
}
static int electra_cf_remove(struct platform_device *ofdev)
{
struct device *device = &ofdev->dev;
struct electra_cf_socket *cf;
cf = dev_get_drvdata(device);
cf->active = 0;
pcmcia_unregister_socket(&cf->socket);
free_irq(cf->irq, cf);
del_timer_sync(&cf->timer);
__iounmap_at(cf->io_virt, cf->io_size);
iounmap(cf->mem_base);
iounmap(cf->gpio_base);
release_mem_region(cf->mem_phys, cf->mem_size);
release_region(cf->io_base, cf->io_size);
kfree(cf);
return 0;
}
static const struct of_device_id electra_cf_match[] = {
{
.compatible = "electra-cf",
},
{},
};
MODULE_DEVICE_TABLE(of, electra_cf_match);
static struct platform_driver electra_cf_driver = {
.driver = {
.name = driver_name,
.of_match_table = electra_cf_match,
},
.probe = electra_cf_probe,
.remove = electra_cf_remove,
};
module_platform_driver(electra_cf_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Olof Johansson <olof@lixom.net>");
MODULE_DESCRIPTION("PA Semi Electra CF driver");