| /* |
| * Copyright (c) 2011, NVIDIA Corporation. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * 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 Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| */ |
| |
| #include <linux/gpio.h> |
| #include <linux/init.h> |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/rfkill.h> |
| #include <linux/platform_device.h> |
| #include <linux/clk.h> |
| #include <linux/slab.h> |
| |
| #include <linux/rfkill-gpio.h> |
| #include <linux/regulator/consumer.h> |
| |
| |
| |
| |
| struct rfkill_gpio_data { |
| struct rfkill_gpio_platform_data *pdata; |
| struct rfkill *rfkill_dev; |
| char *reset_name; |
| char *shutdown_name; |
| }; |
| |
| static int bt_setpower(bool enable){ |
| int ret; |
| struct regulator *vdd_bt = NULL; |
| vdd_bt = regulator_get(NULL,"bt_vcc"); |
| if(IS_ERR(vdd_bt)){ |
| return -1; |
| } |
| |
| if(enable){ |
| ret = regulator_enable(vdd_bt); |
| if(ret!=0){ |
| pr_warn("Failed to enable LDO9: %d\n",ret); |
| } |
| }else{ |
| ret = regulator_disable(vdd_bt); |
| if(ret!=0){ |
| pr_warn("Failed to disable LDO9: %d\n",ret); |
| } |
| } |
| regulator_put(vdd_bt); |
| |
| return ret; |
| } |
| |
| |
| static int rfkill_gpio_set_power(void *data, bool blocked) |
| { |
| struct rfkill_gpio_data *rfkill = data; |
| |
| if (blocked) { |
| if (gpio_is_valid(rfkill->pdata->shutdown_gpio)) |
| gpio_direction_output(rfkill->pdata->shutdown_gpio, 0); |
| if (gpio_is_valid(rfkill->pdata->reset_gpio)) |
| gpio_direction_output(rfkill->pdata->reset_gpio, 0); |
| bt_setpower(false); |
| } else { |
| bt_setpower(true); |
| if (gpio_is_valid(rfkill->pdata->reset_gpio)) |
| gpio_direction_output(rfkill->pdata->reset_gpio, 1); |
| if (gpio_is_valid(rfkill->pdata->shutdown_gpio)) |
| gpio_direction_output(rfkill->pdata->shutdown_gpio, 1); |
| } |
| return 0; |
| } |
| |
| static const struct rfkill_ops rfkill_gpio_ops = { |
| .set_block = rfkill_gpio_set_power, |
| }; |
| |
| static int rfkill_gpio_probe(struct platform_device *pdev) |
| { |
| struct rfkill_gpio_data *rfkill; |
| struct rfkill_gpio_platform_data *pdata = pdev->dev.platform_data; |
| int ret = 0; |
| int len = 0; |
| |
| if (!pdata) { |
| pr_warn("%s: No platform data specified\n", __func__); |
| return -EINVAL; |
| } |
| |
| /* make sure at-least one of the GPIO is defined and that |
| * a name is specified for this instance */ |
| if (!pdata->name || (!gpio_is_valid(pdata->reset_gpio) && |
| !gpio_is_valid(pdata->shutdown_gpio))) { |
| pr_warn("%s: invalid platform data\n", __func__); |
| return -EINVAL; |
| } |
| |
| rfkill = kzalloc(sizeof(*rfkill), GFP_KERNEL); |
| if (!rfkill) |
| return -ENOMEM; |
| |
| rfkill->pdata = pdata; |
| |
| len = strlen(pdata->name); |
| rfkill->reset_name = kzalloc(len + 7, GFP_KERNEL); |
| if (!rfkill->reset_name) { |
| ret = -ENOMEM; |
| goto fail_alloc; |
| } |
| |
| rfkill->shutdown_name = kzalloc(len + 10, GFP_KERNEL); |
| if (!rfkill->shutdown_name) { |
| ret = -ENOMEM; |
| goto fail_reset_name; |
| } |
| |
| snprintf(rfkill->reset_name, len + 6 , "%s_reset", pdata->name); |
| snprintf(rfkill->shutdown_name, len + 9, "%s_shutdown", pdata->name); |
| |
| if (gpio_is_valid(pdata->reset_gpio)) { |
| ret = gpio_request(pdata->reset_gpio, rfkill->reset_name); |
| if (ret) { |
| pr_warn("%s: failed to get reset gpio.\n", __func__); |
| goto fail_shutdown_name; |
| } |
| } |
| |
| if (gpio_is_valid(pdata->shutdown_gpio)) { |
| ret = gpio_request(pdata->shutdown_gpio, rfkill->shutdown_name); |
| if (ret) { |
| pr_warn("%s: failed to get shutdown gpio.\n", __func__); |
| goto fail_reset; |
| } |
| } |
| |
| rfkill->rfkill_dev = rfkill_alloc(pdata->name, &pdev->dev, pdata->type, |
| &rfkill_gpio_ops, rfkill); |
| if (!rfkill->rfkill_dev) |
| goto fail_shutdown; |
| |
| ret = rfkill_register(rfkill->rfkill_dev); |
| if (ret < 0) |
| goto fail_rfkill; |
| |
| platform_set_drvdata(pdev, rfkill); |
| |
| dev_info(&pdev->dev, "%s device registered.\n", pdata->name); |
| |
| return 0; |
| |
| fail_rfkill: |
| rfkill_destroy(rfkill->rfkill_dev); |
| fail_shutdown: |
| if (gpio_is_valid(pdata->shutdown_gpio)) |
| gpio_free(pdata->shutdown_gpio); |
| fail_reset: |
| if (gpio_is_valid(pdata->reset_gpio)) |
| gpio_free(pdata->reset_gpio); |
| |
| fail_shutdown_name: |
| kfree(rfkill->shutdown_name); |
| fail_reset_name: |
| kfree(rfkill->reset_name); |
| fail_alloc: |
| kfree(rfkill); |
| |
| return ret; |
| } |
| |
| static int rfkill_gpio_remove(struct platform_device *pdev) |
| { |
| struct rfkill_gpio_data *rfkill = platform_get_drvdata(pdev); |
| |
| rfkill_unregister(rfkill->rfkill_dev); |
| rfkill_destroy(rfkill->rfkill_dev); |
| if (gpio_is_valid(rfkill->pdata->shutdown_gpio)) |
| gpio_free(rfkill->pdata->shutdown_gpio); |
| if (gpio_is_valid(rfkill->pdata->reset_gpio)) |
| gpio_free(rfkill->pdata->reset_gpio); |
| |
| kfree(rfkill->shutdown_name); |
| kfree(rfkill->reset_name); |
| kfree(rfkill); |
| |
| return 0; |
| } |
| |
| static struct platform_driver rfkill_gpio_driver = { |
| .probe = rfkill_gpio_probe, |
| .remove = __devexit_p(rfkill_gpio_remove), |
| .driver = { |
| .name = "rfkill_gpio", |
| .owner = THIS_MODULE, |
| }, |
| }; |
| |
| static int __init rfkill_gpio_init(void) |
| { |
| return platform_driver_register(&rfkill_gpio_driver); |
| } |
| |
| static void __exit rfkill_gpio_exit(void) |
| { |
| platform_driver_unregister(&rfkill_gpio_driver); |
| } |
| |
| module_init(rfkill_gpio_init); |
| module_exit(rfkill_gpio_exit); |
| |
| MODULE_DESCRIPTION("gpio rfkill"); |
| MODULE_AUTHOR("NVIDIA"); |
| MODULE_LICENSE("GPL"); |
| |