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![Eyal Shapira](/assets/img/avatar_default.png)
wl1271_suspend/resume() accessed the wrong struct and not wl1271 which caused it to think that wow was enabled when it wasn't. Signed-off-by: Eyal Shapira <eyal@wizery.com> Signed-off-by: Luciano Coelho <coelho@ti.com>
375 lines
9.1 KiB
C
375 lines
9.1 KiB
C
/*
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* This file is part of wl1271
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*
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* Copyright (C) 2009-2010 Nokia Corporation
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*
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* Contact: Luciano Coelho <luciano.coelho@nokia.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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*/
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#include <linux/irq.h>
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#include <linux/module.h>
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#include <linux/vmalloc.h>
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#include <linux/platform_device.h>
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#include <linux/mmc/sdio_func.h>
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#include <linux/mmc/sdio_ids.h>
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#include <linux/mmc/card.h>
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#include <linux/mmc/host.h>
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#include <linux/gpio.h>
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#include <linux/wl12xx.h>
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#include <linux/pm_runtime.h>
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#include "wl12xx.h"
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#include "wl12xx_80211.h"
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#include "io.h"
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#ifndef SDIO_VENDOR_ID_TI
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#define SDIO_VENDOR_ID_TI 0x0097
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#endif
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#ifndef SDIO_DEVICE_ID_TI_WL1271
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#define SDIO_DEVICE_ID_TI_WL1271 0x4076
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#endif
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struct wl12xx_sdio_glue {
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struct device *dev;
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struct platform_device *core;
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};
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static const struct sdio_device_id wl1271_devices[] __devinitconst = {
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{ SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271) },
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{}
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};
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MODULE_DEVICE_TABLE(sdio, wl1271_devices);
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static void wl1271_sdio_set_block_size(struct device *child,
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unsigned int blksz)
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{
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struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
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struct sdio_func *func = dev_to_sdio_func(glue->dev);
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sdio_claim_host(func);
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sdio_set_block_size(func, blksz);
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sdio_release_host(func);
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}
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static void wl12xx_sdio_raw_read(struct device *child, int addr, void *buf,
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size_t len, bool fixed)
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{
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int ret;
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struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
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struct sdio_func *func = dev_to_sdio_func(glue->dev);
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if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
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((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
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dev_dbg(child->parent, "sdio read 52 addr 0x%x, byte 0x%02x\n",
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addr, ((u8 *)buf)[0]);
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} else {
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if (fixed)
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ret = sdio_readsb(func, buf, addr, len);
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else
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ret = sdio_memcpy_fromio(func, buf, addr, len);
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dev_dbg(child->parent, "sdio read 53 addr 0x%x, %zu bytes\n",
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addr, len);
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}
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if (ret)
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dev_err(child->parent, "sdio read failed (%d)\n", ret);
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}
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static void wl12xx_sdio_raw_write(struct device *child, int addr, void *buf,
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size_t len, bool fixed)
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{
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int ret;
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struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
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struct sdio_func *func = dev_to_sdio_func(glue->dev);
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if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
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sdio_f0_writeb(func, ((u8 *)buf)[0], addr, &ret);
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dev_dbg(child->parent, "sdio write 52 addr 0x%x, byte 0x%02x\n",
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addr, ((u8 *)buf)[0]);
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} else {
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dev_dbg(child->parent, "sdio write 53 addr 0x%x, %zu bytes\n",
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addr, len);
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if (fixed)
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ret = sdio_writesb(func, addr, buf, len);
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else
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ret = sdio_memcpy_toio(func, addr, buf, len);
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}
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if (ret)
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dev_err(child->parent, "sdio write failed (%d)\n", ret);
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}
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static int wl12xx_sdio_power_on(struct wl12xx_sdio_glue *glue)
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{
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int ret;
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struct sdio_func *func = dev_to_sdio_func(glue->dev);
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/* If enabled, tell runtime PM not to power off the card */
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if (pm_runtime_enabled(&func->dev)) {
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ret = pm_runtime_get_sync(&func->dev);
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if (ret < 0)
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goto out;
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} else {
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/* Runtime PM is disabled: power up the card manually */
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ret = mmc_power_restore_host(func->card->host);
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if (ret < 0)
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goto out;
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}
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sdio_claim_host(func);
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sdio_enable_func(func);
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out:
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return ret;
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}
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static int wl12xx_sdio_power_off(struct wl12xx_sdio_glue *glue)
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{
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int ret;
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struct sdio_func *func = dev_to_sdio_func(glue->dev);
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sdio_disable_func(func);
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sdio_release_host(func);
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/* Power off the card manually, even if runtime PM is enabled. */
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ret = mmc_power_save_host(func->card->host);
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if (ret < 0)
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return ret;
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/* If enabled, let runtime PM know the card is powered off */
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if (pm_runtime_enabled(&func->dev))
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ret = pm_runtime_put_sync(&func->dev);
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return ret;
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}
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static int wl12xx_sdio_set_power(struct device *child, bool enable)
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{
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struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
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if (enable)
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return wl12xx_sdio_power_on(glue);
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else
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return wl12xx_sdio_power_off(glue);
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}
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static struct wl1271_if_operations sdio_ops = {
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.read = wl12xx_sdio_raw_read,
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.write = wl12xx_sdio_raw_write,
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.power = wl12xx_sdio_set_power,
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.set_block_size = wl1271_sdio_set_block_size,
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};
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static int __devinit wl1271_probe(struct sdio_func *func,
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const struct sdio_device_id *id)
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{
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struct wl12xx_platform_data *wlan_data;
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struct wl12xx_sdio_glue *glue;
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struct resource res[1];
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mmc_pm_flag_t mmcflags;
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int ret = -ENOMEM;
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/* We are only able to handle the wlan function */
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if (func->num != 0x02)
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return -ENODEV;
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glue = kzalloc(sizeof(*glue), GFP_KERNEL);
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if (!glue) {
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dev_err(&func->dev, "can't allocate glue\n");
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goto out;
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}
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glue->dev = &func->dev;
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/* Grab access to FN0 for ELP reg. */
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func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
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/* Use block mode for transferring over one block size of data */
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func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
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wlan_data = wl12xx_get_platform_data();
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if (IS_ERR(wlan_data)) {
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ret = PTR_ERR(wlan_data);
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dev_err(glue->dev, "missing wlan platform data: %d\n", ret);
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goto out_free_glue;
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}
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/* if sdio can keep power while host is suspended, enable wow */
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mmcflags = sdio_get_host_pm_caps(func);
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dev_dbg(glue->dev, "sdio PM caps = 0x%x\n", mmcflags);
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if (mmcflags & MMC_PM_KEEP_POWER)
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wlan_data->pwr_in_suspend = true;
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wlan_data->ops = &sdio_ops;
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sdio_set_drvdata(func, glue);
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/* Tell PM core that we don't need the card to be powered now */
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pm_runtime_put_noidle(&func->dev);
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glue->core = platform_device_alloc("wl12xx", -1);
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if (!glue->core) {
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dev_err(glue->dev, "can't allocate platform_device");
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ret = -ENOMEM;
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goto out_free_glue;
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}
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glue->core->dev.parent = &func->dev;
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memset(res, 0x00, sizeof(res));
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res[0].start = wlan_data->irq;
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res[0].flags = IORESOURCE_IRQ;
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res[0].name = "irq";
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ret = platform_device_add_resources(glue->core, res, ARRAY_SIZE(res));
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if (ret) {
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dev_err(glue->dev, "can't add resources\n");
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goto out_dev_put;
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}
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ret = platform_device_add_data(glue->core, wlan_data,
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sizeof(*wlan_data));
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if (ret) {
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dev_err(glue->dev, "can't add platform data\n");
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goto out_dev_put;
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}
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ret = platform_device_add(glue->core);
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if (ret) {
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dev_err(glue->dev, "can't add platform device\n");
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goto out_dev_put;
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}
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return 0;
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out_dev_put:
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platform_device_put(glue->core);
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out_free_glue:
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kfree(glue);
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out:
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return ret;
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}
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static void __devexit wl1271_remove(struct sdio_func *func)
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{
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struct wl12xx_sdio_glue *glue = sdio_get_drvdata(func);
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/* Undo decrement done above in wl1271_probe */
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pm_runtime_get_noresume(&func->dev);
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platform_device_del(glue->core);
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platform_device_put(glue->core);
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kfree(glue);
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}
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#ifdef CONFIG_PM
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static int wl1271_suspend(struct device *dev)
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{
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/* Tell MMC/SDIO core it's OK to power down the card
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* (if it isn't already), but not to remove it completely */
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struct sdio_func *func = dev_to_sdio_func(dev);
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struct wl12xx_sdio_glue *glue = sdio_get_drvdata(func);
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struct wl1271 *wl = platform_get_drvdata(glue->core);
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mmc_pm_flag_t sdio_flags;
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int ret = 0;
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dev_dbg(dev, "wl1271 suspend. wow_enabled: %d\n",
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wl->wow_enabled);
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/* check whether sdio should keep power */
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if (wl->wow_enabled) {
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sdio_flags = sdio_get_host_pm_caps(func);
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if (!(sdio_flags & MMC_PM_KEEP_POWER)) {
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dev_err(dev, "can't keep power while host "
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"is suspended\n");
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ret = -EINVAL;
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goto out;
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}
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/* keep power while host suspended */
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ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
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if (ret) {
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dev_err(dev, "error while trying to keep power\n");
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goto out;
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}
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/* release host */
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sdio_release_host(func);
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}
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out:
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return ret;
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}
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static int wl1271_resume(struct device *dev)
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{
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struct sdio_func *func = dev_to_sdio_func(dev);
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struct wl12xx_sdio_glue *glue = sdio_get_drvdata(func);
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struct wl1271 *wl = platform_get_drvdata(glue->core);
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dev_dbg(dev, "wl1271 resume\n");
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if (wl->wow_enabled) {
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/* claim back host */
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sdio_claim_host(func);
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}
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return 0;
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}
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static const struct dev_pm_ops wl1271_sdio_pm_ops = {
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.suspend = wl1271_suspend,
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.resume = wl1271_resume,
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};
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#endif
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static struct sdio_driver wl1271_sdio_driver = {
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.name = "wl1271_sdio",
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.id_table = wl1271_devices,
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.probe = wl1271_probe,
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.remove = __devexit_p(wl1271_remove),
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#ifdef CONFIG_PM
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.drv = {
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.pm = &wl1271_sdio_pm_ops,
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},
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#endif
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};
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static int __init wl1271_init(void)
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{
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return sdio_register_driver(&wl1271_sdio_driver);
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}
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static void __exit wl1271_exit(void)
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{
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sdio_unregister_driver(&wl1271_sdio_driver);
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}
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module_init(wl1271_init);
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module_exit(wl1271_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Luciano Coelho <coelho@ti.com>");
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MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
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MODULE_FIRMWARE(WL127X_FW_NAME);
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MODULE_FIRMWARE(WL128X_FW_NAME);
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