diff options
Diffstat (limited to 'drivers/net/wireless/wl1251/sdio.c')
| -rw-r--r-- | drivers/net/wireless/wl1251/sdio.c | 103 |
1 files changed, 67 insertions, 36 deletions
diff --git a/drivers/net/wireless/wl1251/sdio.c b/drivers/net/wireless/wl1251/sdio.c index 74ba9ced5393..d550b5e68d3c 100644 --- a/drivers/net/wireless/wl1251/sdio.c +++ b/drivers/net/wireless/wl1251/sdio.c @@ -26,6 +26,7 @@ #include <linux/platform_device.h> #include <linux/wl12xx.h> #include <linux/irq.h> +#include <linux/pm_runtime.h> #include "wl1251.h" @@ -42,8 +43,6 @@ struct wl1251_sdio { u32 elp_val; }; -static struct wl12xx_platform_data *wl12xx_board_data; - static struct sdio_func *wl_to_func(struct wl1251 *wl) { struct wl1251_sdio *wl_sdio = wl->if_priv; @@ -171,8 +170,42 @@ static void wl1251_disable_line_irq(struct wl1251 *wl) return disable_irq(wl->irq); } -static void wl1251_sdio_set_power(bool enable) +static int wl1251_sdio_set_power(struct wl1251 *wl, bool enable) { + struct sdio_func *func = wl_to_func(wl); + int ret; + + if (enable) { + /* + * Power is controlled by runtime PM, but we still call board + * callback in case it wants to do any additional setup, + * for example enabling clock buffer for the module. + */ + if (wl->set_power) + wl->set_power(true); + + ret = pm_runtime_get_sync(&func->dev); + if (ret < 0) + goto out; + + sdio_claim_host(func); + sdio_enable_func(func); + sdio_release_host(func); + } else { + sdio_claim_host(func); + sdio_disable_func(func); + sdio_release_host(func); + + ret = pm_runtime_put_sync(&func->dev); + if (ret < 0) + goto out; + + if (wl->set_power) + wl->set_power(false); + } + +out: + return ret; } static struct wl1251_if_operations wl1251_sdio_ops = { @@ -181,30 +214,7 @@ static struct wl1251_if_operations wl1251_sdio_ops = { .write_elp = wl1251_sdio_write_elp, .read_elp = wl1251_sdio_read_elp, .reset = wl1251_sdio_reset, -}; - -static int wl1251_platform_probe(struct platform_device *pdev) -{ - if (pdev->id != -1) { - wl1251_error("can only handle single device"); - return -ENODEV; - } - - wl12xx_board_data = pdev->dev.platform_data; - return 0; -} - -/* - * Dummy platform_driver for passing platform_data to this driver, - * until we have a way to pass this through SDIO subsystem or - * some other way. - */ -static struct platform_driver wl1251_platform_driver = { - .driver = { - .name = "wl1251_data", - .owner = THIS_MODULE, - }, - .probe = wl1251_platform_probe, + .power = wl1251_sdio_set_power, }; static int wl1251_sdio_probe(struct sdio_func *func, @@ -214,6 +224,7 @@ static int wl1251_sdio_probe(struct sdio_func *func, struct wl1251 *wl; struct ieee80211_hw *hw; struct wl1251_sdio *wl_sdio; + const struct wl12xx_platform_data *wl12xx_board_data; hw = wl1251_alloc_hw(); if (IS_ERR(hw)) @@ -239,9 +250,9 @@ static int wl1251_sdio_probe(struct sdio_func *func, wl_sdio->func = func; wl->if_priv = wl_sdio; wl->if_ops = &wl1251_sdio_ops; - wl->set_power = wl1251_sdio_set_power; - if (wl12xx_board_data != NULL) { + wl12xx_board_data = wl12xx_get_platform_data(); + if (!IS_ERR(wl12xx_board_data)) { wl->set_power = wl12xx_board_data->set_power; wl->irq = wl12xx_board_data->irq; wl->use_eeprom = wl12xx_board_data->use_eeprom; @@ -273,6 +284,10 @@ static int wl1251_sdio_probe(struct sdio_func *func, goto out_free_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 ret; out_free_irq: @@ -294,6 +309,9 @@ static void __devexit wl1251_sdio_remove(struct sdio_func *func) struct wl1251 *wl = sdio_get_drvdata(func); struct wl1251_sdio *wl_sdio = wl->if_priv; + /* Undo decrement done above in wl1251_probe */ + pm_runtime_get_noresume(&func->dev); + if (wl->irq) free_irq(wl->irq, wl); kfree(wl_sdio); @@ -305,23 +323,37 @@ static void __devexit wl1251_sdio_remove(struct sdio_func *func) sdio_release_host(func); } +static int wl1251_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. + */ + return 0; +} + +static int wl1251_resume(struct device *dev) +{ + return 0; +} + +static const struct dev_pm_ops wl1251_sdio_pm_ops = { + .suspend = wl1251_suspend, + .resume = wl1251_resume, +}; + static struct sdio_driver wl1251_sdio_driver = { .name = "wl1251_sdio", .id_table = wl1251_devices, .probe = wl1251_sdio_probe, .remove = __devexit_p(wl1251_sdio_remove), + .drv.pm = &wl1251_sdio_pm_ops, }; static int __init wl1251_sdio_init(void) { int err; - err = platform_driver_register(&wl1251_platform_driver); - if (err) { - wl1251_error("failed to register platform driver: %d", err); - return err; - } - err = sdio_register_driver(&wl1251_sdio_driver); if (err) wl1251_error("failed to register sdio driver: %d", err); @@ -331,7 +363,6 @@ static int __init wl1251_sdio_init(void) static void __exit wl1251_sdio_exit(void) { sdio_unregister_driver(&wl1251_sdio_driver); - platform_driver_unregister(&wl1251_platform_driver); wl1251_notice("unloaded"); } |