/* * This file is part of wl1271 * * Copyright (C) 2009-2010 Nokia Corporation * * Contact: Luciano Coelho * * 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 #include #include #include #include #include #include #include #include #include #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 "); MODULE_AUTHOR("Juuso Oikarinen "); MODULE_FIRMWARE(WL127X_FW_NAME); MODULE_FIRMWARE(WL128X_FW_NAME);