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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Broadcom B43 wireless driver
*
* SDIO over Sonics Silicon Backplane bus glue for b43.
*
* Copyright (C) 2009 Albert Herranz
* Copyright (C) 2009 Michael Buesch <m@bues.ch>
*/
#include <linux/kernel.h>
#include <linux/mmc/card.h>
#include <linux/mmc/sdio_func.h>
#include <linux/mmc/sdio_ids.h>
#include <linux/slab.h>
#include <linux/ssb/ssb.h>
#include "sdio.h"
#include "b43.h"
#define HNBU_CHIPID 0x01 /* vendor & device id */
#define B43_SDIO_BLOCK_SIZE 64 /* rx fifo max size in bytes */
static const struct b43_sdio_quirk {
u16 vendor;
u16 device;
unsigned int quirks;
} b43_sdio_quirks[] = {
{ 0x14E4, 0x4318, SSB_QUIRK_SDIO_READ_AFTER_WRITE32, },
{ },
};
static unsigned int b43_sdio_get_quirks(u16 vendor, u16 device)
{
const struct b43_sdio_quirk *q;
for (q = b43_sdio_quirks; q->quirks; q++) {
if (vendor == q->vendor && device == q->device)
return q->quirks;
}
return 0;
}
static void b43_sdio_interrupt_dispatcher(struct sdio_func *func)
{
struct b43_sdio *sdio = sdio_get_drvdata(func);
struct b43_wldev *dev = sdio->irq_handler_opaque;
if (unlikely(b43_status(dev) < B43_STAT_STARTED))
return;
sdio_release_host(func);
sdio->irq_handler(dev);
sdio_claim_host(func);
}
int b43_sdio_request_irq(struct b43_wldev *dev,
void (*handler)(struct b43_wldev *dev))
{
struct ssb_bus *bus = dev->dev->sdev->bus;
struct sdio_func *func = bus->host_sdio;
struct b43_sdio *sdio = sdio_get_drvdata(func);
int err;
sdio->irq_handler_opaque = dev;
sdio->irq_handler = handler;
sdio_claim_host(func);
err = sdio_claim_irq(func, b43_sdio_interrupt_dispatcher);
sdio_release_host(func);
return err;
}
void b43_sdio_free_irq(struct b43_wldev *dev)
{
struct ssb_bus *bus = dev->dev->sdev->bus;
struct sdio_func *func = bus->host_sdio;
struct b43_sdio *sdio = sdio_get_drvdata(func);
sdio_claim_host(func);
sdio_release_irq(func);
sdio_release_host(func);
sdio->irq_handler_opaque = NULL;
sdio->irq_handler = NULL;
}
static int b43_sdio_probe(struct sdio_func *func,
const struct sdio_device_id *id)
{
struct b43_sdio *sdio;
struct sdio_func_tuple *tuple;
u16 vendor = 0, device = 0;
int error;
/* Look for the card chip identifier. */
tuple = func->tuples;
while (tuple) {
switch (tuple->code) {
case 0x80:
switch (tuple->data[0]) {
case HNBU_CHIPID:
if (tuple->size != 5)
break;
vendor = tuple->data[1] | (tuple->data[2]<<8);
device = tuple->data[3] | (tuple->data[4]<<8);
dev_info(&func->dev, "Chip ID %04x:%04x\n",
vendor, device);
break;
default:
break;
}
break;
default:
break;
}
tuple = tuple->next;
}
if (!vendor || !device) {
error = -ENODEV;
goto out;
}
sdio_claim_host(func);
error = sdio_set_block_size(func, B43_SDIO_BLOCK_SIZE);
if (error) {
dev_err(&func->dev, "failed to set block size to %u bytes,"
" error %d\n", B43_SDIO_BLOCK_SIZE, error);
goto err_release_host;
}
error = sdio_enable_func(func);
if (error) {
dev_err(&func->dev, "failed to enable func, error %d\n", error);
goto err_release_host;
}
sdio_release_host(func);
sdio = kzalloc(sizeof(*sdio), GFP_KERNEL);
if (!sdio) {
error = -ENOMEM;
dev_err(&func->dev, "failed to allocate ssb bus\n");
goto err_disable_func;
}
error = ssb_bus_sdiobus_register(&sdio->ssb, func,
b43_sdio_get_quirks(vendor, device));
if (error) {
dev_err(&func->dev, "failed to register ssb sdio bus,"
" error %d\n", error);
goto err_free_ssb;
}
sdio_set_drvdata(func, sdio);
return 0;
err_free_ssb:
kfree(sdio);
err_disable_func:
sdio_claim_host(func);
sdio_disable_func(func);
err_release_host:
sdio_release_host(func);
out:
return error;
}
static void b43_sdio_remove(struct sdio_func *func)
{
struct b43_sdio *sdio = sdio_get_drvdata(func);
ssb_bus_unregister(&sdio->ssb);
sdio_claim_host(func);
sdio_disable_func(func);
sdio_release_host(func);
kfree(sdio);
sdio_set_drvdata(func, NULL);
}
static const struct sdio_device_id b43_sdio_ids[] = {
{ SDIO_DEVICE(0x02d0, 0x044b) }, /* Nintendo Wii WLAN daughter card */
{ SDIO_DEVICE(0x0092, 0x0004) }, /* C-guys, Inc. EW-CG1102GC */
{ },
};
static struct sdio_driver b43_sdio_driver = {
.name = "b43-sdio",
.id_table = b43_sdio_ids,
.probe = b43_sdio_probe,
.remove = b43_sdio_remove,
};
int b43_sdio_init(void)
{
return sdio_register_driver(&b43_sdio_driver);
}
void b43_sdio_exit(void)
{
sdio_unregister_driver(&b43_sdio_driver);
}
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