linux/drivers/pcmcia/electra_cf.c

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// 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>
2008-07-24 12:28:13 +08:00
#include <linux/mm.h>
#include <linux/vmalloc.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 16:04:11 +08:00
#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");