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wl1271: Initial SDIO implementation
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Added initial implementation of SDIO interfacte to the wl1271 driver.
When selected, this adds new module called "wl1271_sdio".

Signed-off-by: Teemu Paasikivi <ext-teemu.3.paasikivi@nokia.com>
Reviewed-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Teemu Paasikivi authored and John W. Linville committed Mar 9, 2010
1 parent 50b3eb4 commit 5129dff
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12 changes: 12 additions & 0 deletions drivers/net/wireless/wl12xx/Kconfig
Original file line number Diff line number Diff line change
Expand Up @@ -63,3 +63,15 @@ config WL1271_SPI
If you choose to build a module, it'll be called wl1251_spi.
Say N if unsure.

config WL1271_SDIO
tristate "TI wl1271 SDIO support"
depends on WL1271 && MMC
---help---
This module adds support for the SDIO interface of adapters using
TI wl1271 chipset. Select this if your platform is using
the SDIO bus.

If you choose to build a module, it'll be called
wl1271_sdio. Say N if unsure.


1 change: 1 addition & 0 deletions drivers/net/wireless/wl12xx/Makefile
Original file line number Diff line number Diff line change
Expand Up @@ -15,3 +15,4 @@ wl1271-objs = wl1271_main.o wl1271_cmd.o wl1271_io.o \
wl1271-$(CONFIG_NL80211_TESTMODE) += wl1271_testmode.o
obj-$(CONFIG_WL1271) += wl1271.o
obj-$(CONFIG_WL1271_SPI) += wl1271_spi.o
obj-$(CONFIG_WL1271_SDIO) += wl1271_sdio.o
302 changes: 302 additions & 0 deletions drivers/net/wireless/wl12xx/wl1271_sdio.c
Original file line number Diff line number Diff line change
@@ -0,0 +1,302 @@
/*
* This file is part of wl1271
*
* Copyright (C) 2009-2010 Nokia Corporation
*
* Contact: Luciano Coelho <luciano.coelho@nokia.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* 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; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/

#include <linux/irq.h>
#include <linux/module.h>
#include <linux/crc7.h>
#include <linux/vmalloc.h>
#include <linux/mmc/sdio_func.h>
#include <linux/mmc/sdio_ids.h>
#include <linux/mmc/card.h>
#include <plat/gpio.h>

#include "wl1271.h"
#include "wl12xx_80211.h"
#include "wl1271_io.h"


#define RX71_WL1271_IRQ_GPIO 42

#ifndef SDIO_VENDOR_ID_TI
#define SDIO_VENDOR_ID_TI 0x0097
#endif

#ifndef SDIO_DEVICE_ID_TI_WL1271
#define SDIO_DEVICE_ID_TI_WL1271 0x4076
#endif

static const struct sdio_device_id wl1271_devices[] = {
{ SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271) },
{}
};
MODULE_DEVICE_TABLE(sdio, wl1271_devices);

static inline struct sdio_func *wl_to_func(struct wl1271 *wl)
{
return wl->if_priv;
}

static struct device *wl1271_sdio_wl_to_dev(struct wl1271 *wl)
{
return &(wl_to_func(wl)->dev);
}

static irqreturn_t wl1271_irq(int irq, void *cookie)
{
struct wl1271 *wl = cookie;
unsigned long flags;

wl1271_debug(DEBUG_IRQ, "IRQ");

/* complete the ELP completion */
spin_lock_irqsave(&wl->wl_lock, flags);
if (wl->elp_compl) {
complete(wl->elp_compl);
wl->elp_compl = NULL;
}

ieee80211_queue_work(wl->hw, &wl->irq_work);
spin_unlock_irqrestore(&wl->wl_lock, flags);

return IRQ_HANDLED;
}

static void wl1271_sdio_disable_interrupts(struct wl1271 *wl)
{
disable_irq(wl->irq);
}

static void wl1271_sdio_enable_interrupts(struct wl1271 *wl)
{
enable_irq(wl->irq);
}

static void wl1271_sdio_reset(struct wl1271 *wl)
{
}

static void wl1271_sdio_init(struct wl1271 *wl)
{
}

static void wl1271_sdio_raw_read(struct wl1271 *wl, int addr, void *buf,
size_t len, bool fixed)
{
int ret;
struct sdio_func *func = wl_to_func(wl);

sdio_claim_host(func);
if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
wl1271_debug(DEBUG_SPI, "sdio read 52 addr 0x%x, byte 0x%02x",
addr, ((u8 *)buf)[0]);
} else {
if (fixed)
ret = sdio_readsb(func, buf, addr, len);
else
ret = sdio_memcpy_fromio(func, buf, addr, len);

wl1271_debug(DEBUG_SPI, "sdio read 53 addr 0x%x, %d bytes",
addr, len);
wl1271_dump_ascii(DEBUG_SPI, "data: ", buf, len);
}

if (ret)
wl1271_error("sdio read failed (%d)", ret);

sdio_release_host(func);
}

static void wl1271_sdio_raw_write(struct wl1271 *wl, int addr, void *buf,
size_t len, bool fixed)
{
int ret;
struct sdio_func *func = wl_to_func(wl);

sdio_claim_host(func);
if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
sdio_f0_writeb(func, ((u8 *)buf)[0], addr, &ret);
wl1271_debug(DEBUG_SPI, "sdio write 52 addr 0x%x, byte 0x%02x",
addr, ((u8 *)buf)[0]);
} else {
wl1271_debug(DEBUG_SPI, "sdio write 53 addr 0x%x, %d bytes",
addr, len);
wl1271_dump_ascii(DEBUG_SPI, "data: ", buf, len);

if (fixed)
ret = sdio_writesb(func, addr, buf, len);
else
ret = sdio_memcpy_toio(func, addr, buf, len);
}
if (ret)
wl1271_error("sdio write failed (%d)", ret);

sdio_release_host(func);
}

static struct wl1271_if_operations sdio_ops = {
.read = wl1271_sdio_raw_read,
.write = wl1271_sdio_raw_write,
.reset = wl1271_sdio_reset,
.init = wl1271_sdio_init,
.dev = wl1271_sdio_wl_to_dev,
.enable_irq = wl1271_sdio_enable_interrupts,
.disable_irq = wl1271_sdio_disable_interrupts
};

static void wl1271_sdio_set_power(bool enable)
{
}

static int __devinit wl1271_probe(struct sdio_func *func,
const struct sdio_device_id *id)
{
struct ieee80211_hw *hw;
struct wl1271 *wl;
int ret;

/* We are only able to handle the wlan function */
if (func->num != 0x02)
return -ENODEV;

hw = wl1271_alloc_hw();
if (IS_ERR(hw))
return PTR_ERR(hw);

wl = hw->priv;

wl->if_priv = func;
wl->if_ops = &sdio_ops;

wl->set_power = wl1271_sdio_set_power;

/* Grab access to FN0 for ELP reg. */
func->card->quirks |= MMC_QUIRK_LENIENT_FN0;

wl->irq = gpio_to_irq(RX71_WL1271_IRQ_GPIO);
if (wl->irq < 0) {
ret = wl->irq;
wl1271_error("could not get irq!");
goto out_free;
}

ret = request_irq(wl->irq, wl1271_irq, 0, DRIVER_NAME, wl);
if (ret < 0) {
wl1271_error("request_irq() failed: %d", ret);
goto out_free;
}

set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);

disable_irq(wl->irq);

ret = wl1271_init_ieee80211(wl);
if (ret)
goto out_irq;

ret = wl1271_register_hw(wl);
if (ret)
goto out_irq;

sdio_claim_host(func);
ret = sdio_enable_func(func);
if (ret)
goto out_release;

sdio_release_host(func);

wl1271_notice("initialized");

return 0;

out_release:
sdio_release_host(func);

out_irq:
free_irq(wl->irq, wl);


out_free:
ieee80211_free_hw(hw);

return ret;
}

static void __devexit wl1271_remove(struct sdio_func *func)
{
struct wl1271 *wl = sdio_get_drvdata(func);

sdio_claim_host(func);
sdio_disable_func(func);
sdio_release_host(func);
ieee80211_unregister_hw(wl->hw);

free_irq(wl->irq, wl);

kfree(wl->target_mem_map);
vfree(wl->fw);
wl->fw = NULL;
kfree(wl->nvs);
wl->nvs = NULL;

kfree(wl->fw_status);
kfree(wl->tx_res_if);

ieee80211_free_hw(wl->hw);
}

static struct sdio_driver wl1271_sdio_driver = {
.name = "wl1271",
.id_table = wl1271_devices,
.probe = wl1271_probe,
.remove = __devexit_p(wl1271_remove),
};

static int __init wl1271_init(void)
{
int ret;

ret = sdio_register_driver(&wl1271_sdio_driver);
if (ret < 0) {
wl1271_error("failed to register sdio driver: %d", ret);
goto out;
}

out:
return ret;
}

static void __exit wl1271_exit(void)
{
sdio_unregister_driver(&wl1271_sdio_driver);

wl1271_notice("unloaded");
}

module_init(wl1271_init);
module_exit(wl1271_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Luciano Coelho <luciano.coelho@nokia.com>");
MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
MODULE_FIRMWARE(WL1271_FW_NAME);

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