/* * 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 #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 struct wl12xx_sdio_glue { struct device *dev; struct platform_device *core; }; 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 device *child, unsigned int blksz) { struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent); struct sdio_func *func = dev_to_sdio_func(glue->dev); sdio_claim_host(func); sdio_set_block_size(func, blksz); sdio_release_host(func); } static void wl12xx_sdio_raw_read(struct device *child, int addr, void *buf, size_t len, bool fixed) { int ret; struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent); struct sdio_func *func = dev_to_sdio_func(glue->dev); sdio_claim_host(func); if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) { ((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret); dev_dbg(child->parent, "sdio read 52 addr 0x%x, byte 0x%02x\n", addr, ((u8 *)buf)[0]); } else { if (fixed) ret = sdio_readsb(func, buf, addr, len); else ret = sdio_memcpy_fromio(func, buf, addr, len); dev_dbg(child->parent, "sdio read 53 addr 0x%x, %zu bytes\n", addr, len); } sdio_release_host(func); if (ret) dev_err(child->parent, "sdio read failed (%d)\n", ret); } static void wl12xx_sdio_raw_write(struct device *child, int addr, void *buf, size_t len, bool fixed) { int ret; struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent); struct sdio_func *func = dev_to_sdio_func(glue->dev); sdio_claim_host(func); if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) { sdio_f0_writeb(func, ((u8 *)buf)[0], addr, &ret); dev_dbg(child->parent, "sdio write 52 addr 0x%x, byte 0x%02x\n", addr, ((u8 *)buf)[0]); } else { dev_dbg(child->parent, "sdio write 53 addr 0x%x, %zu bytes\n", addr, len); if (fixed) ret = sdio_writesb(func, addr, buf, len); else ret = sdio_memcpy_toio(func, addr, buf, len); } sdio_release_host(func); if (ret) dev_err(child->parent, "sdio write failed (%d)\n", ret); } static int wl12xx_sdio_power_on(struct wl12xx_sdio_glue *glue) { int ret; struct sdio_func *func = dev_to_sdio_func(glue->dev); /* 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 < 0) 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); sdio_release_host(func); out: return ret; } static int wl12xx_sdio_power_off(struct wl12xx_sdio_glue *glue) { int ret; struct sdio_func *func = dev_to_sdio_func(glue->dev); sdio_claim_host(func); 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 wl12xx_sdio_set_power(struct device *child, bool enable) { struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent); if (enable) return wl12xx_sdio_power_on(glue); else return wl12xx_sdio_power_off(glue); } static struct wl1271_if_operations sdio_ops = { .read = wl12xx_sdio_raw_read, .write = wl12xx_sdio_raw_write, .power = wl12xx_sdio_set_power, .set_block_size = wl1271_sdio_set_block_size, }; static int __devinit wl1271_probe(struct sdio_func *func, const struct sdio_device_id *id) { struct wl12xx_platform_data *wlan_data; struct wl12xx_sdio_glue *glue; struct resource res[1]; mmc_pm_flag_t mmcflags; int ret = -ENOMEM; /* We are only able to handle the wlan function */ if (func->num != 0x02) return -ENODEV; glue = kzalloc(sizeof(*glue), GFP_KERNEL); if (!glue) { dev_err(&func->dev, "can't allocate glue\n"); goto out; } glue->dev = &func->dev; /* 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); dev_err(glue->dev, "missing wlan platform data: %d\n", ret); goto out_free_glue; } /* if sdio can keep power while host is suspended, enable wow */ mmcflags = sdio_get_host_pm_caps(func); dev_dbg(glue->dev, "sdio PM caps = 0x%x\n", mmcflags); if (mmcflags & MMC_PM_KEEP_POWER) wlan_data->pwr_in_suspend = true; wlan_data->ops = &sdio_ops; sdio_set_drvdata(func, glue); /* Tell PM core that we don't need the card to be powered now */ pm_runtime_put_noidle(&func->dev); glue->core = platform_device_alloc("wl12xx", -1); if (!glue->core) { dev_err(glue->dev, "can't allocate platform_device"); ret = -ENOMEM; goto out_free_glue; } glue->core->dev.parent = &func->dev; memset(res, 0x00, sizeof(res)); res[0].start = wlan_data->irq; res[0].flags = IORESOURCE_IRQ; res[0].name = "irq"; ret = platform_device_add_resources(glue->core, res, ARRAY_SIZE(res)); if (ret) { dev_err(glue->dev, "can't add resources\n"); goto out_dev_put; } ret = platform_device_add_data(glue->core, wlan_data, sizeof(*wlan_data)); if (ret) { dev_err(glue->dev, "can't add platform data\n"); goto out_dev_put; } ret = platform_device_add(glue->core); if (ret) { dev_err(glue->dev, "can't add platform device\n"); goto out_dev_put; } return 0; out_dev_put: platform_device_put(glue->core); out_free_glue: kfree(glue); out: return ret; } static void __devexit wl1271_remove(struct sdio_func *func) { struct wl12xx_sdio_glue *glue = sdio_get_drvdata(func); /* Undo decrement done above in wl1271_probe */ pm_runtime_get_noresume(&func->dev); platform_device_del(glue->core); platform_device_put(glue->core); kfree(glue); } #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 wl12xx_sdio_glue *glue = sdio_get_drvdata(func); struct wl1271 *wl = platform_get_drvdata(glue->core); mmc_pm_flag_t sdio_flags; int ret = 0; dev_dbg(dev, "wl1271 suspend. wow_enabled: %d\n", 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)) { dev_err(dev, "can't keep power while host " "is suspended\n"); ret = -EINVAL; goto out; } /* keep power while host suspended */ ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER); if (ret) { dev_err(dev, "error while trying to keep power\n"); goto out; } } out: return ret; } static int wl1271_resume(struct device *dev) { dev_dbg(dev, "wl1271 resume\n"); 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);