mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 19:29:37 +00:00
![Wolfram Sang](/assets/img/avatar_default.png)
A platform_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
316 lines
7.3 KiB
C
316 lines
7.3 KiB
C
/*
|
|
* file: drivers/pcmcia/bfin_cf.c
|
|
*
|
|
* based on: drivers/pcmcia/omap_cf.c
|
|
* omap_cf.c -- OMAP 16xx CompactFlash controller driver
|
|
*
|
|
* Copyright (c) 2005 David Brownell
|
|
* Copyright (c) 2006-2008 Michael Hennerich Analog Devices Inc.
|
|
*
|
|
* bugs: enter bugs at http://blackfin.uclinux.org/
|
|
*
|
|
* 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, 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; see the file copying.
|
|
* if not, write to the free software foundation,
|
|
* 59 temple place - suite 330, boston, ma 02111-1307, usa.
|
|
*/
|
|
|
|
#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/slab.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/io.h>
|
|
|
|
#include <pcmcia/ss.h>
|
|
#include <pcmcia/cisreg.h>
|
|
#include <asm/gpio.h>
|
|
|
|
#define SZ_1K 0x00000400
|
|
#define SZ_8K 0x00002000
|
|
#define SZ_2K (2 * SZ_1K)
|
|
|
|
#define POLL_INTERVAL (2 * HZ)
|
|
|
|
#define CF_ATASEL_ENA 0x20311802 /* Inverts RESET */
|
|
#define CF_ATASEL_DIS 0x20311800
|
|
|
|
#define bfin_cf_present(pfx) (gpio_get_value(pfx))
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
static const char driver_name[] = "bfin_cf_pcmcia";
|
|
|
|
struct bfin_cf_socket {
|
|
struct pcmcia_socket socket;
|
|
|
|
struct timer_list timer;
|
|
unsigned present:1;
|
|
unsigned active:1;
|
|
|
|
struct platform_device *pdev;
|
|
unsigned long phys_cf_io;
|
|
unsigned long phys_cf_attr;
|
|
u_int irq;
|
|
u_short cd_pfx;
|
|
};
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
static int bfin_cf_reset(void)
|
|
{
|
|
outw(0, CF_ATASEL_ENA);
|
|
mdelay(200);
|
|
outw(0, CF_ATASEL_DIS);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bfin_cf_ss_init(struct pcmcia_socket *s)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/* the timer is primarily to kick this socket's pccardd */
|
|
static void bfin_cf_timer(unsigned long _cf)
|
|
{
|
|
struct bfin_cf_socket *cf = (void *)_cf;
|
|
unsigned short present = bfin_cf_present(cf->cd_pfx);
|
|
|
|
if (present != cf->present) {
|
|
cf->present = present;
|
|
dev_dbg(&cf->pdev->dev, ": card %s\n",
|
|
present ? "present" : "gone");
|
|
pcmcia_parse_events(&cf->socket, SS_DETECT);
|
|
}
|
|
|
|
if (cf->active)
|
|
mod_timer(&cf->timer, jiffies + POLL_INTERVAL);
|
|
}
|
|
|
|
static int bfin_cf_get_status(struct pcmcia_socket *s, u_int *sp)
|
|
{
|
|
struct bfin_cf_socket *cf;
|
|
|
|
if (!sp)
|
|
return -EINVAL;
|
|
|
|
cf = container_of(s, struct bfin_cf_socket, socket);
|
|
|
|
if (bfin_cf_present(cf->cd_pfx)) {
|
|
*sp = SS_READY | SS_DETECT | SS_POWERON | SS_3VCARD;
|
|
s->pcmcia_irq = 0;
|
|
s->pci_irq = cf->irq;
|
|
|
|
} else
|
|
*sp = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
bfin_cf_set_socket(struct pcmcia_socket *sock, struct socket_state_t *s)
|
|
{
|
|
|
|
struct bfin_cf_socket *cf;
|
|
cf = container_of(sock, struct bfin_cf_socket, socket);
|
|
|
|
switch (s->Vcc) {
|
|
case 0:
|
|
case 33:
|
|
break;
|
|
case 50:
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (s->flags & SS_RESET) {
|
|
disable_irq(cf->irq);
|
|
bfin_cf_reset();
|
|
enable_irq(cf->irq);
|
|
}
|
|
|
|
dev_dbg(&cf->pdev->dev, ": Vcc %d, io_irq %d, flags %04x csc %04x\n",
|
|
s->Vcc, s->io_irq, s->flags, s->csc_mask);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bfin_cf_ss_suspend(struct pcmcia_socket *s)
|
|
{
|
|
return bfin_cf_set_socket(s, &dead_socket);
|
|
}
|
|
|
|
/* regions are 2K each: mem, attrib, io (and reserved-for-ide) */
|
|
|
|
static int bfin_cf_set_io_map(struct pcmcia_socket *s, struct pccard_io_map *io)
|
|
{
|
|
struct bfin_cf_socket *cf;
|
|
|
|
cf = container_of(s, struct bfin_cf_socket, socket);
|
|
io->flags &= MAP_ACTIVE | MAP_ATTRIB | MAP_16BIT;
|
|
io->start = cf->phys_cf_io;
|
|
io->stop = io->start + SZ_2K - 1;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
bfin_cf_set_mem_map(struct pcmcia_socket *s, struct pccard_mem_map *map)
|
|
{
|
|
struct bfin_cf_socket *cf;
|
|
|
|
if (map->card_start)
|
|
return -EINVAL;
|
|
cf = container_of(s, struct bfin_cf_socket, socket);
|
|
map->static_start = cf->phys_cf_io;
|
|
map->flags &= MAP_ACTIVE | MAP_ATTRIB | MAP_16BIT;
|
|
if (map->flags & MAP_ATTRIB)
|
|
map->static_start = cf->phys_cf_attr;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct pccard_operations bfin_cf_ops = {
|
|
.init = bfin_cf_ss_init,
|
|
.suspend = bfin_cf_ss_suspend,
|
|
.get_status = bfin_cf_get_status,
|
|
.set_socket = bfin_cf_set_socket,
|
|
.set_io_map = bfin_cf_set_io_map,
|
|
.set_mem_map = bfin_cf_set_mem_map,
|
|
};
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
static int bfin_cf_probe(struct platform_device *pdev)
|
|
{
|
|
struct bfin_cf_socket *cf;
|
|
struct resource *io_mem, *attr_mem;
|
|
int irq;
|
|
unsigned short cd_pfx;
|
|
int status = 0;
|
|
|
|
dev_info(&pdev->dev, "Blackfin CompactFlash/PCMCIA Socket Driver\n");
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (irq <= 0)
|
|
return -EINVAL;
|
|
|
|
cd_pfx = platform_get_irq(pdev, 1); /*Card Detect GPIO PIN */
|
|
|
|
if (gpio_request(cd_pfx, "pcmcia: CD")) {
|
|
dev_err(&pdev->dev,
|
|
"Failed ro request Card Detect GPIO_%d\n",
|
|
cd_pfx);
|
|
return -EBUSY;
|
|
}
|
|
gpio_direction_input(cd_pfx);
|
|
|
|
cf = kzalloc(sizeof *cf, GFP_KERNEL);
|
|
if (!cf) {
|
|
gpio_free(cd_pfx);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
cf->cd_pfx = cd_pfx;
|
|
|
|
setup_timer(&cf->timer, bfin_cf_timer, (unsigned long)cf);
|
|
|
|
cf->pdev = pdev;
|
|
platform_set_drvdata(pdev, cf);
|
|
|
|
cf->irq = irq;
|
|
cf->socket.pci_irq = irq;
|
|
|
|
irq_set_irq_type(irq, IRQF_TRIGGER_LOW);
|
|
|
|
io_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
attr_mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
|
|
|
|
if (!io_mem || !attr_mem)
|
|
goto fail0;
|
|
|
|
cf->phys_cf_io = io_mem->start;
|
|
cf->phys_cf_attr = attr_mem->start;
|
|
|
|
/* pcmcia layer only remaps "real" memory */
|
|
cf->socket.io_offset = (unsigned long)
|
|
ioremap(cf->phys_cf_io, SZ_2K);
|
|
|
|
if (!cf->socket.io_offset)
|
|
goto fail0;
|
|
|
|
dev_err(&pdev->dev, ": on irq %d\n", irq);
|
|
|
|
dev_dbg(&pdev->dev, ": %s\n",
|
|
bfin_cf_present(cf->cd_pfx) ? "present" : "(not present)");
|
|
|
|
cf->socket.owner = THIS_MODULE;
|
|
cf->socket.dev.parent = &pdev->dev;
|
|
cf->socket.ops = &bfin_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 = SZ_2K;
|
|
|
|
status = pcmcia_register_socket(&cf->socket);
|
|
if (status < 0)
|
|
goto fail2;
|
|
|
|
cf->active = 1;
|
|
mod_timer(&cf->timer, jiffies + POLL_INTERVAL);
|
|
return 0;
|
|
|
|
fail2:
|
|
iounmap((void __iomem *)cf->socket.io_offset);
|
|
release_mem_region(cf->phys_cf_io, SZ_8K);
|
|
|
|
fail0:
|
|
gpio_free(cf->cd_pfx);
|
|
kfree(cf);
|
|
platform_set_drvdata(pdev, NULL);
|
|
|
|
return status;
|
|
}
|
|
|
|
static int bfin_cf_remove(struct platform_device *pdev)
|
|
{
|
|
struct bfin_cf_socket *cf = platform_get_drvdata(pdev);
|
|
|
|
gpio_free(cf->cd_pfx);
|
|
cf->active = 0;
|
|
pcmcia_unregister_socket(&cf->socket);
|
|
del_timer_sync(&cf->timer);
|
|
iounmap((void __iomem *)cf->socket.io_offset);
|
|
release_mem_region(cf->phys_cf_io, SZ_8K);
|
|
platform_set_drvdata(pdev, NULL);
|
|
kfree(cf);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver bfin_cf_driver = {
|
|
.driver = {
|
|
.name = driver_name,
|
|
},
|
|
.probe = bfin_cf_probe,
|
|
.remove = bfin_cf_remove,
|
|
};
|
|
|
|
module_platform_driver(bfin_cf_driver);
|
|
|
|
MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
|
|
MODULE_DESCRIPTION("BFIN CF/PCMCIA Driver");
|
|
MODULE_LICENSE("GPL");
|