mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 19:29:37 +00:00
![Vaishali Thakkar](/assets/img/avatar_default.png)
This patch introduces the use of function setup_timer. This is done using Coccinelle and semantic patch used is as follows: @@ expression x,y,z; @@ - init_timer (&x); + setup_timer (&x, y, z); - x.function = y; - x.data = z; Signed-off-by: Vaishali Thakkar <vthakkar1994@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
357 lines
8.7 KiB
C
357 lines
8.7 KiB
C
/*
|
|
* omap_cf.c -- OMAP 16xx 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/delay.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <pcmcia/ss.h>
|
|
|
|
#include <mach/hardware.h>
|
|
#include <asm/io.h>
|
|
#include <asm/sizes.h>
|
|
|
|
#include <mach/mux.h>
|
|
#include <mach/tc.h>
|
|
|
|
|
|
/* NOTE: don't expect this to support many I/O cards. The 16xx chips have
|
|
* hard-wired timings to support Compact Flash memory cards; they won't work
|
|
* with various other devices (like WLAN adapters) without some external
|
|
* logic to help out.
|
|
*
|
|
* NOTE: CF controller docs disagree with address space docs as to where
|
|
* CF_BASE really lives; this is a doc erratum.
|
|
*/
|
|
#define CF_BASE 0xfffe2800
|
|
|
|
/* status; read after IRQ */
|
|
#define CF_STATUS (CF_BASE + 0x00)
|
|
# define CF_STATUS_BAD_READ (1 << 2)
|
|
# define CF_STATUS_BAD_WRITE (1 << 1)
|
|
# define CF_STATUS_CARD_DETECT (1 << 0)
|
|
|
|
/* which chipselect (CS0..CS3) is used for CF (active low) */
|
|
#define CF_CFG (CF_BASE + 0x02)
|
|
|
|
/* card reset */
|
|
#define CF_CONTROL (CF_BASE + 0x04)
|
|
# define CF_CONTROL_RESET (1 << 0)
|
|
|
|
#define omap_cf_present() (!(omap_readw(CF_STATUS) & CF_STATUS_CARD_DETECT))
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
static const char driver_name[] = "omap_cf";
|
|
|
|
struct omap_cf_socket {
|
|
struct pcmcia_socket socket;
|
|
|
|
struct timer_list timer;
|
|
unsigned present:1;
|
|
unsigned active:1;
|
|
|
|
struct platform_device *pdev;
|
|
unsigned long phys_cf;
|
|
u_int irq;
|
|
struct resource iomem;
|
|
};
|
|
|
|
#define POLL_INTERVAL (2 * HZ)
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
static int omap_cf_ss_init(struct pcmcia_socket *s)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/* the timer is primarily to kick this socket's pccardd */
|
|
static void omap_cf_timer(unsigned long _cf)
|
|
{
|
|
struct omap_cf_socket *cf = (void *) _cf;
|
|
unsigned present = omap_cf_present();
|
|
|
|
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);
|
|
}
|
|
|
|
if (cf->active)
|
|
mod_timer(&cf->timer, jiffies + POLL_INTERVAL);
|
|
}
|
|
|
|
/* This irq handler prevents "irqNNN: nobody cared" messages as drivers
|
|
* claim the card's IRQ. It may also detect some card insertions, but
|
|
* not removals; it can't always eliminate timer irqs.
|
|
*/
|
|
static irqreturn_t omap_cf_irq(int irq, void *_cf)
|
|
{
|
|
omap_cf_timer((unsigned long)_cf);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int omap_cf_get_status(struct pcmcia_socket *s, u_int *sp)
|
|
{
|
|
if (!sp)
|
|
return -EINVAL;
|
|
|
|
/* NOTE CF is always 3VCARD */
|
|
if (omap_cf_present()) {
|
|
struct omap_cf_socket *cf;
|
|
|
|
*sp = SS_READY | SS_DETECT | SS_POWERON | SS_3VCARD;
|
|
cf = container_of(s, struct omap_cf_socket, socket);
|
|
s->pcmcia_irq = 0;
|
|
s->pci_irq = cf->irq;
|
|
} else
|
|
*sp = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
omap_cf_set_socket(struct pcmcia_socket *sock, struct socket_state_t *s)
|
|
{
|
|
u16 control;
|
|
|
|
/* REVISIT some non-OSK boards may support power switching */
|
|
switch (s->Vcc) {
|
|
case 0:
|
|
case 33:
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
control = omap_readw(CF_CONTROL);
|
|
if (s->flags & SS_RESET)
|
|
omap_writew(CF_CONTROL_RESET, CF_CONTROL);
|
|
else
|
|
omap_writew(0, CF_CONTROL);
|
|
|
|
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 omap_cf_ss_suspend(struct pcmcia_socket *s)
|
|
{
|
|
pr_debug("%s: %s\n", driver_name, __func__);
|
|
return omap_cf_set_socket(s, &dead_socket);
|
|
}
|
|
|
|
/* regions are 2K each: mem, attrib, io (and reserved-for-ide) */
|
|
|
|
static int
|
|
omap_cf_set_io_map(struct pcmcia_socket *s, struct pccard_io_map *io)
|
|
{
|
|
struct omap_cf_socket *cf;
|
|
|
|
cf = container_of(s, struct omap_cf_socket, socket);
|
|
io->flags &= MAP_ACTIVE|MAP_ATTRIB|MAP_16BIT;
|
|
io->start = cf->phys_cf + SZ_4K;
|
|
io->stop = io->start + SZ_2K - 1;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
omap_cf_set_mem_map(struct pcmcia_socket *s, struct pccard_mem_map *map)
|
|
{
|
|
struct omap_cf_socket *cf;
|
|
|
|
if (map->card_start)
|
|
return -EINVAL;
|
|
cf = container_of(s, struct omap_cf_socket, socket);
|
|
map->static_start = cf->phys_cf;
|
|
map->flags &= MAP_ACTIVE|MAP_ATTRIB|MAP_16BIT;
|
|
if (map->flags & MAP_ATTRIB)
|
|
map->static_start += SZ_2K;
|
|
return 0;
|
|
}
|
|
|
|
static struct pccard_operations omap_cf_ops = {
|
|
.init = omap_cf_ss_init,
|
|
.suspend = omap_cf_ss_suspend,
|
|
.get_status = omap_cf_get_status,
|
|
.set_socket = omap_cf_set_socket,
|
|
.set_io_map = omap_cf_set_io_map,
|
|
.set_mem_map = omap_cf_set_mem_map,
|
|
};
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
/*
|
|
* NOTE: right now the only board-specific platform_data is
|
|
* "what chipselect is used". Boards could want more.
|
|
*/
|
|
|
|
static int __init omap_cf_probe(struct platform_device *pdev)
|
|
{
|
|
unsigned seg;
|
|
struct omap_cf_socket *cf;
|
|
int irq;
|
|
int status;
|
|
|
|
seg = (int) pdev->dev.platform_data;
|
|
if (seg == 0 || seg > 3)
|
|
return -ENODEV;
|
|
|
|
/* either CFLASH.IREQ (INT_1610_CF) or some GPIO */
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (irq < 0)
|
|
return -EINVAL;
|
|
|
|
cf = kzalloc(sizeof *cf, GFP_KERNEL);
|
|
if (!cf)
|
|
return -ENOMEM;
|
|
setup_timer(&cf->timer, omap_cf_timer, (unsigned long)cf);
|
|
|
|
cf->pdev = pdev;
|
|
platform_set_drvdata(pdev, cf);
|
|
|
|
/* this primarily just shuts up irq handling noise */
|
|
status = request_irq(irq, omap_cf_irq, IRQF_SHARED,
|
|
driver_name, cf);
|
|
if (status < 0)
|
|
goto fail0;
|
|
cf->irq = irq;
|
|
cf->socket.pci_irq = irq;
|
|
|
|
switch (seg) {
|
|
/* NOTE: CS0 could be configured too ... */
|
|
case 1:
|
|
cf->phys_cf = OMAP_CS1_PHYS;
|
|
break;
|
|
case 2:
|
|
cf->phys_cf = OMAP_CS2_PHYS;
|
|
break;
|
|
case 3:
|
|
cf->phys_cf = omap_cs3_phys();
|
|
break;
|
|
default:
|
|
goto fail1;
|
|
}
|
|
cf->iomem.start = cf->phys_cf;
|
|
cf->iomem.end = cf->iomem.end + SZ_8K - 1;
|
|
cf->iomem.flags = IORESOURCE_MEM;
|
|
|
|
/* pcmcia layer only remaps "real" memory */
|
|
cf->socket.io_offset = (unsigned long)
|
|
ioremap(cf->phys_cf + SZ_4K, SZ_2K);
|
|
if (!cf->socket.io_offset)
|
|
goto fail1;
|
|
|
|
if (!request_mem_region(cf->phys_cf, SZ_8K, driver_name))
|
|
goto fail1;
|
|
|
|
/* NOTE: CF conflicts with MMC1 */
|
|
omap_cfg_reg(W11_1610_CF_CD1);
|
|
omap_cfg_reg(P11_1610_CF_CD2);
|
|
omap_cfg_reg(R11_1610_CF_IOIS16);
|
|
omap_cfg_reg(V10_1610_CF_IREQ);
|
|
omap_cfg_reg(W10_1610_CF_RESET);
|
|
|
|
omap_writew(~(1 << seg), CF_CFG);
|
|
|
|
pr_info("%s: cs%d on irq %d\n", driver_name, seg, irq);
|
|
|
|
/* NOTE: better EMIFS setup might support more cards; but the
|
|
* TRM only shows how to affect regular flash signals, not their
|
|
* CF/PCMCIA variants...
|
|
*/
|
|
pr_debug("%s: cs%d, previous ccs %08x acs %08x\n", driver_name,
|
|
seg, omap_readl(EMIFS_CCS(seg)), omap_readl(EMIFS_ACS(seg)));
|
|
omap_writel(0x0004a1b3, EMIFS_CCS(seg)); /* synch mode 4 etc */
|
|
omap_writel(0x00000000, EMIFS_ACS(seg)); /* OE hold/setup */
|
|
|
|
/* CF uses armxor_ck, which is "always" available */
|
|
|
|
pr_debug("%s: sts %04x cfg %04x control %04x %s\n", driver_name,
|
|
omap_readw(CF_STATUS), omap_readw(CF_CFG),
|
|
omap_readw(CF_CONTROL),
|
|
omap_cf_present() ? "present" : "(not present)");
|
|
|
|
cf->socket.owner = THIS_MODULE;
|
|
cf->socket.dev.parent = &pdev->dev;
|
|
cf->socket.ops = &omap_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 = &cf->iomem;
|
|
|
|
status = pcmcia_register_socket(&cf->socket);
|
|
if (status < 0)
|
|
goto fail2;
|
|
|
|
cf->active = 1;
|
|
mod_timer(&cf->timer, jiffies + POLL_INTERVAL);
|
|
return 0;
|
|
|
|
fail2:
|
|
release_mem_region(cf->phys_cf, SZ_8K);
|
|
fail1:
|
|
if (cf->socket.io_offset)
|
|
iounmap((void __iomem *) cf->socket.io_offset);
|
|
free_irq(irq, cf);
|
|
fail0:
|
|
kfree(cf);
|
|
return status;
|
|
}
|
|
|
|
static int __exit omap_cf_remove(struct platform_device *pdev)
|
|
{
|
|
struct omap_cf_socket *cf = platform_get_drvdata(pdev);
|
|
|
|
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, SZ_8K);
|
|
free_irq(cf->irq, cf);
|
|
kfree(cf);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver omap_cf_driver = {
|
|
.driver = {
|
|
.name = (char *) driver_name,
|
|
},
|
|
.remove = __exit_p(omap_cf_remove),
|
|
};
|
|
|
|
static int __init omap_cf_init(void)
|
|
{
|
|
if (cpu_is_omap16xx())
|
|
return platform_driver_probe(&omap_cf_driver, omap_cf_probe);
|
|
return -ENODEV;
|
|
}
|
|
|
|
static void __exit omap_cf_exit(void)
|
|
{
|
|
if (cpu_is_omap16xx())
|
|
platform_driver_unregister(&omap_cf_driver);
|
|
}
|
|
|
|
module_init(omap_cf_init);
|
|
module_exit(omap_cf_exit);
|
|
|
|
MODULE_DESCRIPTION("OMAP CF Driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:omap_cf");
|