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OpenCloudOS-Kernel/drivers/net/wireless/wl12xx/sdio.c

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/*
* 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/vmalloc.h>
#include <linux/mmc/sdio_func.h>
#include <linux/mmc/sdio_ids.h>
#include <linux/mmc/card.h>
#include <linux/mmc/host.h>
#include <linux/gpio.h>
#include <linux/wl12xx.h>
#include <linux/pm_runtime.h>
#include "wl12xx.h"
#include "wl12xx_80211.h"
#include "io.h"
#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[] __devinitconst = {
{ SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271) },
{}
};
MODULE_DEVICE_TABLE(sdio, wl1271_devices);
static void wl1271_sdio_set_block_size(struct wl1271 *wl, unsigned int blksz)
{
sdio_claim_host(wl->if_priv);
sdio_set_block_size(wl->if_priv, blksz);
sdio_release_host(wl->if_priv);
}
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_hardirq(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);
set_bit(WL1271_FLAG_IRQ_RUNNING, &wl->flags);
if (wl->elp_compl) {
complete(wl->elp_compl);
wl->elp_compl = NULL;
}
if (test_bit(WL1271_FLAG_SUSPENDED, &wl->flags)) {
/* don't enqueue a work right now. mark it as pending */
set_bit(WL1271_FLAG_PENDING_WORK, &wl->flags);
wl1271_debug(DEBUG_IRQ, "should not enqueue work");
disable_irq_nosync(wl->irq);
pm_wakeup_event(wl1271_sdio_wl_to_dev(wl), 0);
spin_unlock_irqrestore(&wl->wl_lock, flags);
return IRQ_HANDLED;
}
spin_unlock_irqrestore(&wl->wl_lock, flags);
return IRQ_WAKE_THREAD;
}
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_raw_read(struct wl1271 *wl, int addr, void *buf,
size_t len, bool fixed)
{
int ret;
struct sdio_func *func = wl_to_func(wl);
if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
wl1271_debug(DEBUG_SDIO, "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_SDIO, "sdio read 53 addr 0x%x, %zu bytes",
addr, len);
wl1271_dump_ascii(DEBUG_SDIO, "data: ", buf, len);
}
if (ret)
wl1271_error("sdio read failed (%d)", ret);
}
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);
if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
sdio_f0_writeb(func, ((u8 *)buf)[0], addr, &ret);
wl1271_debug(DEBUG_SDIO, "sdio write 52 addr 0x%x, byte 0x%02x",
addr, ((u8 *)buf)[0]);
} else {
wl1271_debug(DEBUG_SDIO, "sdio write 53 addr 0x%x, %zu bytes",
addr, len);
wl1271_dump_ascii(DEBUG_SDIO, "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);
}
static int wl1271_sdio_power_on(struct wl1271 *wl)
{
struct sdio_func *func = wl_to_func(wl);
int ret;
/* If enabled, tell runtime PM not to power off the card */
if (pm_runtime_enabled(&func->dev)) {
ret = pm_runtime_get_sync(&func->dev);
if (ret)
goto out;
} else {
/* Runtime PM is disabled: power up the card manually */
ret = mmc_power_restore_host(func->card->host);
if (ret < 0)
goto out;
}
sdio_claim_host(func);
sdio_enable_func(func);
out:
return ret;
}
static int wl1271_sdio_power_off(struct wl1271 *wl)
{
struct sdio_func *func = wl_to_func(wl);
int ret;
sdio_disable_func(func);
sdio_release_host(func);
/* Power off the card manually, even if runtime PM is enabled. */
ret = mmc_power_save_host(func->card->host);
if (ret < 0)
return ret;
/* If enabled, let runtime PM know the card is powered off */
if (pm_runtime_enabled(&func->dev))
ret = pm_runtime_put_sync(&func->dev);
return ret;
}
static int wl1271_sdio_set_power(struct wl1271 *wl, bool enable)
{
if (enable)
return wl1271_sdio_power_on(wl);
else
return wl1271_sdio_power_off(wl);
}
static struct wl1271_if_operations sdio_ops = {
.read = wl1271_sdio_raw_read,
.write = wl1271_sdio_raw_write,
.power = wl1271_sdio_set_power,
.dev = wl1271_sdio_wl_to_dev,
.enable_irq = wl1271_sdio_enable_interrupts,
.disable_irq = wl1271_sdio_disable_interrupts,
.set_block_size = wl1271_sdio_set_block_size,
};
static int __devinit wl1271_probe(struct sdio_func *func,
const struct sdio_device_id *id)
{
struct ieee80211_hw *hw;
const struct wl12xx_platform_data *wlan_data;
struct wl1271 *wl;
unsigned long irqflags;
mmc_pm_flag_t mmcflags;
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;
/* Grab access to FN0 for ELP reg. */
func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
/* Use block mode for transferring over one block size of data */
func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
wlan_data = wl12xx_get_platform_data();
if (IS_ERR(wlan_data)) {
ret = PTR_ERR(wlan_data);
wl1271_error("missing wlan platform data: %d", ret);
goto out_free;
}
wl->irq = wlan_data->irq;
wl->ref_clock = wlan_data->board_ref_clock;
wl->tcxo_clock = wlan_data->board_tcxo_clock;
wl->platform_quirks = wlan_data->platform_quirks;
if (wl->platform_quirks & WL12XX_PLATFORM_QUIRK_EDGE_IRQ)
irqflags = IRQF_TRIGGER_RISING;
else
irqflags = IRQF_TRIGGER_HIGH | IRQF_ONESHOT;
ret = request_threaded_irq(wl->irq, wl1271_hardirq, wl1271_irq,
irqflags,
DRIVER_NAME, wl);
if (ret < 0) {
wl1271_error("request_irq() failed: %d", ret);
goto out_free;
}
ret = enable_irq_wake(wl->irq);
if (!ret) {
wl->irq_wake_enabled = true;
device_init_wakeup(wl1271_sdio_wl_to_dev(wl), 1);
/* if sdio can keep power while host is suspended, enable wow */
mmcflags = sdio_get_host_pm_caps(func);
wl1271_debug(DEBUG_SDIO, "sdio PM caps = 0x%x", mmcflags);
if (mmcflags & MMC_PM_KEEP_POWER)
hw->wiphy->wowlan.flags = WIPHY_WOWLAN_ANY;
}
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_set_drvdata(func, wl);
/* Tell PM core that we don't need the card to be powered now */
pm_runtime_put_noidle(&func->dev);
return 0;
out_irq:
free_irq(wl->irq, wl);
out_free:
wl1271_free_hw(wl);
return ret;
}
static void __devexit wl1271_remove(struct sdio_func *func)
{
struct wl1271 *wl = sdio_get_drvdata(func);
/* Undo decrement done above in wl1271_probe */
pm_runtime_get_noresume(&func->dev);
wl1271_unregister_hw(wl);
if (wl->irq_wake_enabled) {
device_init_wakeup(wl1271_sdio_wl_to_dev(wl), 0);
disable_irq_wake(wl->irq);
}
free_irq(wl->irq, wl);
wl1271_free_hw(wl);
}
#ifdef CONFIG_PM
static int wl1271_suspend(struct device *dev)
{
/* Tell MMC/SDIO core it's OK to power down the card
* (if it isn't already), but not to remove it completely */
struct sdio_func *func = dev_to_sdio_func(dev);
struct wl1271 *wl = sdio_get_drvdata(func);
mmc_pm_flag_t sdio_flags;
int ret = 0;
wl1271_debug(DEBUG_MAC80211, "wl1271 suspend. wow_enabled: %d",
wl->wow_enabled);
/* check whether sdio should keep power */
if (wl->wow_enabled) {
sdio_flags = sdio_get_host_pm_caps(func);
if (!(sdio_flags & MMC_PM_KEEP_POWER)) {
wl1271_error("can't keep power while host "
"is suspended");
ret = -EINVAL;
goto out;
}
/* keep power while host suspended */
ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
if (ret) {
wl1271_error("error while trying to keep power");
goto out;
}
/* release host */
sdio_release_host(func);
}
out:
return ret;
}
static int wl1271_resume(struct device *dev)
{
struct sdio_func *func = dev_to_sdio_func(dev);
struct wl1271 *wl = sdio_get_drvdata(func);
wl1271_debug(DEBUG_MAC80211, "wl1271 resume");
if (wl->wow_enabled) {
/* claim back host */
sdio_claim_host(func);
}
return 0;
}
static const struct dev_pm_ops wl1271_sdio_pm_ops = {
.suspend = wl1271_suspend,
.resume = wl1271_resume,
};
#endif
static struct sdio_driver wl1271_sdio_driver = {
.name = "wl1271_sdio",
.id_table = wl1271_devices,
.probe = wl1271_probe,
.remove = __devexit_p(wl1271_remove),
#ifdef CONFIG_PM
.drv = {
.pm = &wl1271_sdio_pm_ops,
},
#endif
};
static int __init wl1271_init(void)
{
return sdio_register_driver(&wl1271_sdio_driver);
}
static void __exit wl1271_exit(void)
{
sdio_unregister_driver(&wl1271_sdio_driver);
}
module_init(wl1271_init);
module_exit(wl1271_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Luciano Coelho <coelho@ti.com>");
MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
MODULE_FIRMWARE(WL1271_FW_NAME);
MODULE_FIRMWARE(WL128X_FW_NAME);
MODULE_FIRMWARE(WL127X_AP_FW_NAME);
MODULE_FIRMWARE(WL128X_AP_FW_NAME);
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