diff options
Diffstat (limited to 'drivers/net/wireless/cw1200/cw1200_sdio.c')
| -rw-r--r-- | drivers/net/wireless/cw1200/cw1200_sdio.c | 425 |
1 files changed, 0 insertions, 425 deletions
diff --git a/drivers/net/wireless/cw1200/cw1200_sdio.c b/drivers/net/wireless/cw1200/cw1200_sdio.c deleted file mode 100644 index d3acc85932a5..000000000000 --- a/drivers/net/wireless/cw1200/cw1200_sdio.c +++ /dev/null @@ -1,425 +0,0 @@ -/* - * Mac80211 SDIO driver for ST-Ericsson CW1200 device - * - * Copyright (c) 2010, ST-Ericsson - * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no> - * - * 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. - */ - -#include <linux/module.h> -#include <linux/gpio.h> -#include <linux/delay.h> -#include <linux/mmc/host.h> -#include <linux/mmc/sdio_func.h> -#include <linux/mmc/card.h> -#include <linux/mmc/sdio.h> -#include <net/mac80211.h> - -#include "cw1200.h" -#include "hwbus.h" -#include <linux/platform_data/net-cw1200.h> -#include "hwio.h" - -MODULE_AUTHOR("Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>"); -MODULE_DESCRIPTION("mac80211 ST-Ericsson CW1200 SDIO driver"); -MODULE_LICENSE("GPL"); - -#define SDIO_BLOCK_SIZE (512) - -/* Default platform data for Sagrad modules */ -static struct cw1200_platform_data_sdio sagrad_109x_evk_platform_data = { - .ref_clk = 38400, - .have_5ghz = false, - .sdd_file = "sdd_sagrad_1091_1098.bin", -}; - -/* Allow platform data to be overridden */ -static struct cw1200_platform_data_sdio *global_plat_data = &sagrad_109x_evk_platform_data; - -void __init cw1200_sdio_set_platform_data(struct cw1200_platform_data_sdio *pdata) -{ - global_plat_data = pdata; -} - -struct hwbus_priv { - struct sdio_func *func; - struct cw1200_common *core; - const struct cw1200_platform_data_sdio *pdata; -}; - -#ifndef SDIO_VENDOR_ID_STE -#define SDIO_VENDOR_ID_STE 0x0020 -#endif - -#ifndef SDIO_DEVICE_ID_STE_CW1200 -#define SDIO_DEVICE_ID_STE_CW1200 0x2280 -#endif - -static const struct sdio_device_id cw1200_sdio_ids[] = { - { SDIO_DEVICE(SDIO_VENDOR_ID_STE, SDIO_DEVICE_ID_STE_CW1200) }, - { /* end: all zeroes */ }, -}; - -/* hwbus_ops implemetation */ - -static int cw1200_sdio_memcpy_fromio(struct hwbus_priv *self, - unsigned int addr, - void *dst, int count) -{ - return sdio_memcpy_fromio(self->func, dst, addr, count); -} - -static int cw1200_sdio_memcpy_toio(struct hwbus_priv *self, - unsigned int addr, - const void *src, int count) -{ - return sdio_memcpy_toio(self->func, addr, (void *)src, count); -} - -static void cw1200_sdio_lock(struct hwbus_priv *self) -{ - sdio_claim_host(self->func); -} - -static void cw1200_sdio_unlock(struct hwbus_priv *self) -{ - sdio_release_host(self->func); -} - -static void cw1200_sdio_irq_handler(struct sdio_func *func) -{ - struct hwbus_priv *self = sdio_get_drvdata(func); - - /* note: sdio_host already claimed here. */ - if (self->core) - cw1200_irq_handler(self->core); -} - -static irqreturn_t cw1200_gpio_hardirq(int irq, void *dev_id) -{ - return IRQ_WAKE_THREAD; -} - -static irqreturn_t cw1200_gpio_irq(int irq, void *dev_id) -{ - struct hwbus_priv *self = dev_id; - - if (self->core) { - cw1200_sdio_lock(self); - cw1200_irq_handler(self->core); - cw1200_sdio_unlock(self); - return IRQ_HANDLED; - } else { - return IRQ_NONE; - } -} - -static int cw1200_request_irq(struct hwbus_priv *self) -{ - int ret; - u8 cccr; - - cccr = sdio_f0_readb(self->func, SDIO_CCCR_IENx, &ret); - if (WARN_ON(ret)) - goto err; - - /* Master interrupt enable ... */ - cccr |= BIT(0); - - /* ... for our function */ - cccr |= BIT(self->func->num); - - sdio_f0_writeb(self->func, cccr, SDIO_CCCR_IENx, &ret); - if (WARN_ON(ret)) - goto err; - - ret = enable_irq_wake(self->pdata->irq); - if (WARN_ON(ret)) - goto err; - - /* Request the IRQ */ - ret = request_threaded_irq(self->pdata->irq, cw1200_gpio_hardirq, - cw1200_gpio_irq, - IRQF_TRIGGER_HIGH | IRQF_ONESHOT, - "cw1200_wlan_irq", self); - if (WARN_ON(ret)) - goto err; - - return 0; - -err: - return ret; -} - -static int cw1200_sdio_irq_subscribe(struct hwbus_priv *self) -{ - int ret = 0; - - pr_debug("SW IRQ subscribe\n"); - sdio_claim_host(self->func); - if (self->pdata->irq) - ret = cw1200_request_irq(self); - else - ret = sdio_claim_irq(self->func, cw1200_sdio_irq_handler); - - sdio_release_host(self->func); - return ret; -} - -static int cw1200_sdio_irq_unsubscribe(struct hwbus_priv *self) -{ - int ret = 0; - - pr_debug("SW IRQ unsubscribe\n"); - - if (self->pdata->irq) { - disable_irq_wake(self->pdata->irq); - free_irq(self->pdata->irq, self); - } else { - sdio_claim_host(self->func); - ret = sdio_release_irq(self->func); - sdio_release_host(self->func); - } - return ret; -} - -static int cw1200_sdio_off(const struct cw1200_platform_data_sdio *pdata) -{ - if (pdata->reset) { - gpio_set_value(pdata->reset, 0); - msleep(30); /* Min is 2 * CLK32K cycles */ - gpio_free(pdata->reset); - } - - if (pdata->power_ctrl) - pdata->power_ctrl(pdata, false); - if (pdata->clk_ctrl) - pdata->clk_ctrl(pdata, false); - - return 0; -} - -static int cw1200_sdio_on(const struct cw1200_platform_data_sdio *pdata) -{ - /* Ensure I/Os are pulled low */ - if (pdata->reset) { - gpio_request(pdata->reset, "cw1200_wlan_reset"); - gpio_direction_output(pdata->reset, 0); - } - if (pdata->powerup) { - gpio_request(pdata->powerup, "cw1200_wlan_powerup"); - gpio_direction_output(pdata->powerup, 0); - } - if (pdata->reset || pdata->powerup) - msleep(10); /* Settle time? */ - - /* Enable 3v3 and 1v8 to hardware */ - if (pdata->power_ctrl) { - if (pdata->power_ctrl(pdata, true)) { - pr_err("power_ctrl() failed!\n"); - return -1; - } - } - - /* Enable CLK32K */ - if (pdata->clk_ctrl) { - if (pdata->clk_ctrl(pdata, true)) { - pr_err("clk_ctrl() failed!\n"); - return -1; - } - msleep(10); /* Delay until clock is stable for 2 cycles */ - } - - /* Enable POWERUP signal */ - if (pdata->powerup) { - gpio_set_value(pdata->powerup, 1); - msleep(250); /* or more..? */ - } - /* Enable RSTn signal */ - if (pdata->reset) { - gpio_set_value(pdata->reset, 1); - msleep(50); /* Or more..? */ - } - return 0; -} - -static size_t cw1200_sdio_align_size(struct hwbus_priv *self, size_t size) -{ - if (self->pdata->no_nptb) - size = round_up(size, SDIO_BLOCK_SIZE); - else - size = sdio_align_size(self->func, size); - - return size; -} - -static int cw1200_sdio_pm(struct hwbus_priv *self, bool suspend) -{ - int ret = 0; - - if (self->pdata->irq) - ret = irq_set_irq_wake(self->pdata->irq, suspend); - return ret; -} - -static struct hwbus_ops cw1200_sdio_hwbus_ops = { - .hwbus_memcpy_fromio = cw1200_sdio_memcpy_fromio, - .hwbus_memcpy_toio = cw1200_sdio_memcpy_toio, - .lock = cw1200_sdio_lock, - .unlock = cw1200_sdio_unlock, - .align_size = cw1200_sdio_align_size, - .power_mgmt = cw1200_sdio_pm, -}; - -/* Probe Function to be called by SDIO stack when device is discovered */ -static int cw1200_sdio_probe(struct sdio_func *func, - const struct sdio_device_id *id) -{ - struct hwbus_priv *self; - int status; - - pr_info("cw1200_wlan_sdio: Probe called\n"); - - /* We are only able to handle the wlan function */ - if (func->num != 0x01) - return -ENODEV; - - self = kzalloc(sizeof(*self), GFP_KERNEL); - if (!self) { - pr_err("Can't allocate SDIO hwbus_priv.\n"); - return -ENOMEM; - } - - func->card->quirks |= MMC_QUIRK_LENIENT_FN0; - - self->pdata = global_plat_data; /* FIXME */ - self->func = func; - sdio_set_drvdata(func, self); - sdio_claim_host(func); - sdio_enable_func(func); - sdio_release_host(func); - - status = cw1200_sdio_irq_subscribe(self); - - status = cw1200_core_probe(&cw1200_sdio_hwbus_ops, - self, &func->dev, &self->core, - self->pdata->ref_clk, - self->pdata->macaddr, - self->pdata->sdd_file, - self->pdata->have_5ghz); - if (status) { - cw1200_sdio_irq_unsubscribe(self); - sdio_claim_host(func); - sdio_disable_func(func); - sdio_release_host(func); - sdio_set_drvdata(func, NULL); - kfree(self); - } - - return status; -} - -/* Disconnect Function to be called by SDIO stack when - * device is disconnected - */ -static void cw1200_sdio_disconnect(struct sdio_func *func) -{ - struct hwbus_priv *self = sdio_get_drvdata(func); - - if (self) { - cw1200_sdio_irq_unsubscribe(self); - if (self->core) { - cw1200_core_release(self->core); - self->core = NULL; - } - sdio_claim_host(func); - sdio_disable_func(func); - sdio_release_host(func); - sdio_set_drvdata(func, NULL); - kfree(self); - } -} - -#ifdef CONFIG_PM -static int cw1200_sdio_suspend(struct device *dev) -{ - int ret; - struct sdio_func *func = dev_to_sdio_func(dev); - struct hwbus_priv *self = sdio_get_drvdata(func); - - if (!cw1200_can_suspend(self->core)) - return -EAGAIN; - - /* Notify SDIO that CW1200 will remain powered during suspend */ - ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER); - if (ret) - pr_err("Error setting SDIO pm flags: %i\n", ret); - - return ret; -} - -static int cw1200_sdio_resume(struct device *dev) -{ - return 0; -} - -static const struct dev_pm_ops cw1200_pm_ops = { - .suspend = cw1200_sdio_suspend, - .resume = cw1200_sdio_resume, -}; -#endif - -static struct sdio_driver sdio_driver = { - .name = "cw1200_wlan_sdio", - .id_table = cw1200_sdio_ids, - .probe = cw1200_sdio_probe, - .remove = cw1200_sdio_disconnect, -#ifdef CONFIG_PM - .drv = { - .pm = &cw1200_pm_ops, - } -#endif -}; - -/* Init Module function -> Called by insmod */ -static int __init cw1200_sdio_init(void) -{ - const struct cw1200_platform_data_sdio *pdata; - int ret; - - /* FIXME -- this won't support multiple devices */ - pdata = global_plat_data; - - if (cw1200_sdio_on(pdata)) { - ret = -1; - goto err; - } - - ret = sdio_register_driver(&sdio_driver); - if (ret) - goto err; - - return 0; - -err: - cw1200_sdio_off(pdata); - return ret; -} - -/* Called at Driver Unloading */ -static void __exit cw1200_sdio_exit(void) -{ - const struct cw1200_platform_data_sdio *pdata; - - /* FIXME -- this won't support multiple devices */ - pdata = global_plat_data; - sdio_unregister_driver(&sdio_driver); - cw1200_sdio_off(pdata); -} - - -module_init(cw1200_sdio_init); -module_exit(cw1200_sdio_exit); |
