/* * 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 #include #include #include "wlcore.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 bool dump = false; struct wl12xx_sdio_glue { struct device *dev; struct platform_device *core; }; 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 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 int __must_check 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)) { ((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 (WARN_ON(ret)) dev_err(child->parent, "sdio read failed (%d)\n", ret); if (unlikely(dump)) { printk(KERN_DEBUG "wlcore_sdio: READ from 0x%04x\n", addr); print_hex_dump(KERN_DEBUG, "wlcore_sdio: READ ", DUMP_PREFIX_OFFSET, 16, 1, buf, len, false); } return ret; } static int __must_check 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(dump)) { printk(KERN_DEBUG "wlcore_sdio: WRITE to 0x%04x\n", addr); print_hex_dump(KERN_DEBUG, "wlcore_sdio: WRITE ", DUMP_PREFIX_OFFSET, 16, 1, buf, len, false); } if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG)) { 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 (WARN_ON(ret)) dev_err(child->parent, "sdio write failed (%d)\n", ret); return ret; } static int wl12xx_sdio_power_on(struct wl12xx_sdio_glue *glue) { int ret; struct sdio_func *func = dev_to_sdio_func(glue->dev); struct mmc_card *card = func->card; ret = pm_runtime_get_sync(&card->dev); if (ret) { /* * Runtime PM might be temporarily disabled, or the device * might have a positive reference counter. Make sure it is * really powered on. */ ret = mmc_power_restore_host(card->host); if (ret < 0) { pm_runtime_put_sync(&card->dev); 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); struct mmc_card *card = func->card; sdio_claim_host(func); sdio_disable_func(func); sdio_release_host(func); /* Power off the card manually in case it wasn't powered off above */ ret = mmc_power_save_host(card->host); if (ret < 0) goto out; /* Let runtime PM know the card is powered off */ pm_runtime_put_sync(&card->dev); out: 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, }; #ifdef CONFIG_OF static const struct wilink_family_data wl127x_data = { .name = "wl127x", .nvs_name = "ti-connectivity/wl127x-nvs.bin", }; static const struct wilink_family_data wl128x_data = { .name = "wl128x", .nvs_name = "ti-connectivity/wl128x-nvs.bin", }; static const struct wilink_family_data wl18xx_data = { .name = "wl18xx", .cfg_name = "ti-connectivity/wl18xx-conf.bin", }; static const struct of_device_id wlcore_sdio_of_match_table[] = { { .compatible = "ti,wl1271", .data = &wl127x_data }, { .compatible = "ti,wl1273", .data = &wl127x_data }, { .compatible = "ti,wl1281", .data = &wl128x_data }, { .compatible = "ti,wl1283", .data = &wl128x_data }, { .compatible = "ti,wl1285", .data = &wl128x_data }, { .compatible = "ti,wl1801", .data = &wl18xx_data }, { .compatible = "ti,wl1805", .data = &wl18xx_data }, { .compatible = "ti,wl1807", .data = &wl18xx_data }, { .compatible = "ti,wl1831", .data = &wl18xx_data }, { .compatible = "ti,wl1835", .data = &wl18xx_data }, { .compatible = "ti,wl1837", .data = &wl18xx_data }, { } }; static int wlcore_probe_of(struct device *dev, int *irq, struct wlcore_platdev_data *pdev_data) { struct device_node *np = dev->of_node; const struct of_device_id *of_id; of_id = of_match_node(wlcore_sdio_of_match_table, np); if (!of_id) return -ENODEV; pdev_data->family = of_id->data; *irq = irq_of_parse_and_map(np, 0); if (!*irq) { dev_err(dev, "No irq in platform data\n"); return -EINVAL; } /* optional clock frequency params */ of_property_read_u32(np, "ref-clock-frequency", &pdev_data->ref_clock_freq); of_property_read_u32(np, "tcxo-clock-frequency", &pdev_data->tcxo_clock_freq); return 0; } #else static int wlcore_probe_of(struct device *dev, int *irq, struct wlcore_platdev_data *pdev_data) { return -ENODATA; } #endif static int wl1271_probe(struct sdio_func *func, const struct sdio_device_id *id) { struct wlcore_platdev_data *pdev_data; struct wl12xx_sdio_glue *glue; struct resource res[1]; mmc_pm_flag_t mmcflags; int ret = -ENOMEM; int irq; const char *chip_family; /* We are only able to handle the wlan function */ if (func->num != 0x02) return -ENODEV; pdev_data = devm_kzalloc(&func->dev, sizeof(*pdev_data), GFP_KERNEL); if (!pdev_data) return -ENOMEM; pdev_data->if_ops = &sdio_ops; glue = devm_kzalloc(&func->dev, sizeof(*glue), GFP_KERNEL); if (!glue) return -ENOMEM; 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; ret = wlcore_probe_of(&func->dev, &irq, pdev_data); if (ret) goto out; /* 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) pdev_data->pwr_in_suspend = true; 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); /* * Due to a hardware bug, we can't differentiate wl18xx from * wl12xx, because both report the same device ID. The only * way to differentiate is by checking the SDIO revision, * which is 3.00 on the wl18xx chips. */ if (func->card->cccr.sdio_vsn == SDIO_SDIO_REV_3_00) chip_family = "wl18xx"; else chip_family = "wl12xx"; glue->core = platform_device_alloc(chip_family, PLATFORM_DEVID_AUTO); if (!glue->core) { dev_err(glue->dev, "can't allocate platform_device"); ret = -ENOMEM; goto out; } glue->core->dev.parent = &func->dev; memset(res, 0x00, sizeof(res)); res[0].start = irq; res[0].flags = IORESOURCE_IRQ | irqd_get_trigger_type(irq_get_irq_data(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, pdev_data, sizeof(*pdev_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: return ret; } static void 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_unregister(glue->core); } #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 = 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_param(dump, bool, S_IRUSR | S_IWUSR); MODULE_PARM_DESC(dump, "Enable sdio read/write dumps."); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Luciano Coelho "); MODULE_AUTHOR("Juuso Oikarinen ");