android_kernel_motorola_sm6225/drivers/pcmcia/at91_cf.c
Tim Schmielau cd354f1ae7 [PATCH] remove many unneeded #includes of sched.h
After Al Viro (finally) succeeded in removing the sched.h #include in module.h
recently, it makes sense again to remove other superfluous sched.h includes.
There are quite a lot of files which include it but don't actually need
anything defined in there.  Presumably these includes were once needed for
macros that used to live in sched.h, but moved to other header files in the
course of cleaning it up.

To ease the pain, this time I did not fiddle with any header files and only
removed #includes from .c-files, which tend to cause less trouble.

Compile tested against 2.6.20-rc2 and 2.6.20-rc2-mm2 (with offsets) on alpha,
arm, i386, ia64, mips, powerpc, and x86_64 with allnoconfig, defconfig,
allmodconfig, and allyesconfig as well as a few randconfigs on x86_64 and all
configs in arch/arm/configs on arm.  I also checked that no new warnings were
introduced by the patch (actually, some warnings are removed that were emitted
by unnecessarily included header files).

Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-14 08:09:54 -08:00

385 lines
9.3 KiB
C

/*
* at91_cf.c -- AT91 CompactFlash controller driver
*
* Copyright (C) 2005 David Brownell
*
* 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.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <pcmcia/ss.h>
#include <asm/hardware.h>
#include <asm/io.h>
#include <asm/sizes.h>
#include <asm/arch/board.h>
#include <asm/arch/gpio.h>
#include <asm/arch/at91rm9200_mc.h>
/*
* A0..A10 work in each range; A23 indicates I/O space; A25 is CFRNW;
* some other bit in {A24,A22..A11} is nREG to flag memory access
* (vs attributes). So more than 2KB/region would just be waste.
* Note: These are offsets from the physical base address.
*/
#define CF_ATTR_PHYS (0)
#define CF_IO_PHYS (1 << 23)
#define CF_MEM_PHYS (0x017ff800)
/*--------------------------------------------------------------------------*/
static const char driver_name[] = "at91_cf";
struct at91_cf_socket {
struct pcmcia_socket socket;
unsigned present:1;
struct platform_device *pdev;
struct at91_cf_data *board;
unsigned long phys_baseaddr;
};
#define SZ_2K (2 * SZ_1K)
static inline int at91_cf_present(struct at91_cf_socket *cf)
{
return !at91_get_gpio_value(cf->board->det_pin);
}
/*--------------------------------------------------------------------------*/
static int at91_cf_ss_init(struct pcmcia_socket *s)
{
return 0;
}
static irqreturn_t at91_cf_irq(int irq, void *_cf)
{
struct at91_cf_socket *cf = _cf;
if (irq == cf->board->det_pin) {
unsigned present = at91_cf_present(cf);
/* kick pccard as needed */
if (present != cf->present) {
cf->present = present;
pr_debug("%s: card %s\n", driver_name,
present ? "present" : "gone");
pcmcia_parse_events(&cf->socket, SS_DETECT);
}
}
return IRQ_HANDLED;
}
static int at91_cf_get_status(struct pcmcia_socket *s, u_int *sp)
{
struct at91_cf_socket *cf;
if (!sp)
return -EINVAL;
cf = container_of(s, struct at91_cf_socket, socket);
/* NOTE: CF is always 3VCARD */
if (at91_cf_present(cf)) {
int rdy = cf->board->irq_pin; /* RDY/nIRQ */
int vcc = cf->board->vcc_pin;
*sp = SS_DETECT | SS_3VCARD;
if (!rdy || at91_get_gpio_value(rdy))
*sp |= SS_READY;
if (!vcc || at91_get_gpio_value(vcc))
*sp |= SS_POWERON;
} else
*sp = 0;
return 0;
}
static int
at91_cf_set_socket(struct pcmcia_socket *sock, struct socket_state_t *s)
{
struct at91_cf_socket *cf;
cf = container_of(sock, struct at91_cf_socket, socket);
/* switch Vcc if needed and possible */
if (cf->board->vcc_pin) {
switch (s->Vcc) {
case 0:
at91_set_gpio_value(cf->board->vcc_pin, 0);
break;
case 33:
at91_set_gpio_value(cf->board->vcc_pin, 1);
break;
default:
return -EINVAL;
}
}
/* toggle reset if needed */
at91_set_gpio_value(cf->board->rst_pin, s->flags & SS_RESET);
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 at91_cf_ss_suspend(struct pcmcia_socket *s)
{
return at91_cf_set_socket(s, &dead_socket);
}
/* we already mapped the I/O region */
static int at91_cf_set_io_map(struct pcmcia_socket *s, struct pccard_io_map *io)
{
struct at91_cf_socket *cf;
u32 csr;
cf = container_of(s, struct at91_cf_socket, socket);
io->flags &= (MAP_ACTIVE | MAP_16BIT | MAP_AUTOSZ);
/*
* Use 16 bit accesses unless/until we need 8-bit i/o space.
*/
csr = at91_sys_read(AT91_SMC_CSR(cf->board->chipselect)) & ~AT91_SMC_DBW;
/*
* NOTE: this CF controller ignores IOIS16, so we can't really do
* MAP_AUTOSZ. The 16bit mode allows single byte access on either
* D0-D7 (even addr) or D8-D15 (odd), so it's close enough for many
* purposes (and handles ide-cs).
*
* The 8bit mode is needed for odd byte access on D0-D7. It seems
* some cards only like that way to get at the odd byte, despite
* CF 3.0 spec table 35 also giving the D8-D15 option.
*/
if (!(io->flags & (MAP_16BIT | MAP_AUTOSZ))) {
csr |= AT91_SMC_DBW_8;
pr_debug("%s: 8bit i/o bus\n", driver_name);
} else {
csr |= AT91_SMC_DBW_16;
pr_debug("%s: 16bit i/o bus\n", driver_name);
}
at91_sys_write(AT91_SMC_CSR(cf->board->chipselect), csr);
io->start = cf->socket.io_offset;
io->stop = io->start + SZ_2K - 1;
return 0;
}
/* pcmcia layer maps/unmaps mem regions */
static int
at91_cf_set_mem_map(struct pcmcia_socket *s, struct pccard_mem_map *map)
{
struct at91_cf_socket *cf;
if (map->card_start)
return -EINVAL;
cf = container_of(s, struct at91_cf_socket, socket);
map->flags &= (MAP_ACTIVE | MAP_ATTRIB | MAP_16BIT);
if (map->flags & MAP_ATTRIB)
map->static_start = cf->phys_baseaddr + CF_ATTR_PHYS;
else
map->static_start = cf->phys_baseaddr + CF_MEM_PHYS;
return 0;
}
static struct pccard_operations at91_cf_ops = {
.init = at91_cf_ss_init,
.suspend = at91_cf_ss_suspend,
.get_status = at91_cf_get_status,
.set_socket = at91_cf_set_socket,
.set_io_map = at91_cf_set_io_map,
.set_mem_map = at91_cf_set_mem_map,
};
/*--------------------------------------------------------------------------*/
static int __init at91_cf_probe(struct platform_device *pdev)
{
struct at91_cf_socket *cf;
struct at91_cf_data *board = pdev->dev.platform_data;
struct resource *io;
int status;
if (!board || !board->det_pin || !board->rst_pin)
return -ENODEV;
io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!io)
return -ENODEV;
cf = kzalloc(sizeof *cf, GFP_KERNEL);
if (!cf)
return -ENOMEM;
cf->board = board;
cf->pdev = pdev;
cf->phys_baseaddr = io->start;
platform_set_drvdata(pdev, cf);
/* must be a GPIO; ergo must trigger on both edges */
status = request_irq(board->det_pin, at91_cf_irq, 0, driver_name, cf);
if (status < 0)
goto fail0;
device_init_wakeup(&pdev->dev, 1);
/*
* The card driver will request this irq later as needed.
* but it causes lots of "irqNN: nobody cared" messages
* unless we report that we handle everything (sigh).
* (Note: DK board doesn't wire the IRQ pin...)
*/
if (board->irq_pin) {
status = request_irq(board->irq_pin, at91_cf_irq,
IRQF_SHARED, driver_name, cf);
if (status < 0)
goto fail0a;
cf->socket.pci_irq = board->irq_pin;
} else
cf->socket.pci_irq = NR_IRQS + 1;
/* pcmcia layer only remaps "real" memory not iospace */
cf->socket.io_offset = (unsigned long) ioremap(cf->phys_baseaddr + CF_IO_PHYS, SZ_2K);
if (!cf->socket.io_offset) {
status = -ENXIO;
goto fail1;
}
/* reserve chip-select regions */
if (!request_mem_region(io->start, io->end + 1 - io->start,
driver_name)) {
status = -ENXIO;
goto fail1;
}
pr_info("%s: irqs det #%d, io #%d\n", driver_name,
board->det_pin, board->irq_pin);
cf->socket.owner = THIS_MODULE;
cf->socket.dev.dev = &pdev->dev;
cf->socket.ops = &at91_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;
cf->socket.io[0].res = io;
status = pcmcia_register_socket(&cf->socket);
if (status < 0)
goto fail2;
return 0;
fail2:
release_mem_region(io->start, io->end + 1 - io->start);
fail1:
if (cf->socket.io_offset)
iounmap((void __iomem *) cf->socket.io_offset);
if (board->irq_pin)
free_irq(board->irq_pin, cf);
fail0a:
device_init_wakeup(&pdev->dev, 0);
free_irq(board->det_pin, cf);
fail0:
kfree(cf);
return status;
}
static int __exit at91_cf_remove(struct platform_device *pdev)
{
struct at91_cf_socket *cf = platform_get_drvdata(pdev);
struct at91_cf_data *board = cf->board;
struct resource *io = cf->socket.io[0].res;
pcmcia_unregister_socket(&cf->socket);
if (board->irq_pin)
free_irq(board->irq_pin, cf);
device_init_wakeup(&pdev->dev, 0);
free_irq(board->det_pin, cf);
iounmap((void __iomem *) cf->socket.io_offset);
release_mem_region(io->start, io->end + 1 - io->start);
kfree(cf);
return 0;
}
#ifdef CONFIG_PM
static int at91_cf_suspend(struct platform_device *pdev, pm_message_t mesg)
{
struct at91_cf_socket *cf = platform_get_drvdata(pdev);
struct at91_cf_data *board = cf->board;
pcmcia_socket_dev_suspend(&pdev->dev, mesg);
if (device_may_wakeup(&pdev->dev)) {
enable_irq_wake(board->det_pin);
if (board->irq_pin)
enable_irq_wake(board->irq_pin);
} else {
disable_irq_wake(board->det_pin);
if (board->irq_pin)
disable_irq_wake(board->irq_pin);
}
return 0;
}
static int at91_cf_resume(struct platform_device *pdev)
{
pcmcia_socket_dev_resume(&pdev->dev);
return 0;
}
#else
#define at91_cf_suspend NULL
#define at91_cf_resume NULL
#endif
static struct platform_driver at91_cf_driver = {
.driver = {
.name = (char *) driver_name,
.owner = THIS_MODULE,
},
.probe = at91_cf_probe,
.remove = __exit_p(at91_cf_remove),
.suspend = at91_cf_suspend,
.resume = at91_cf_resume,
};
/*--------------------------------------------------------------------------*/
static int __init at91_cf_init(void)
{
return platform_driver_register(&at91_cf_driver);
}
module_init(at91_cf_init);
static void __exit at91_cf_exit(void)
{
platform_driver_unregister(&at91_cf_driver);
}
module_exit(at91_cf_exit);
MODULE_DESCRIPTION("AT91 Compact Flash Driver");
MODULE_AUTHOR("David Brownell");
MODULE_LICENSE("GPL");