wl1273-core.c revision 383268a8e282fb549dabe3a33ccafc9434ab6006
1383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen/* 2383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen * MFD driver for wl1273 FM radio and audio codec submodules. 3383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen * 4383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen * Copyright (C) 2010 Nokia Corporation 5383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen * Author: Matti Aaltonen <matti.j.aaltonen@nokia.com> 6383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen * 7383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen * This program is free software; you can redistribute it and/or modify 8383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen * it under the terms of the GNU General Public License version 2 as 9383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen * published by the Free Software Foundation. 10383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen * 11383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen * This program is distributed in the hope that it will be useful, but 12383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen * WITHOUT ANY WARRANTY; without even the implied warranty of 13383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen * General Public License for more details. 15383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen * 16383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen * You should have received a copy of the GNU General Public License 17383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen * along with this program; if not, write to the Free Software 18383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 19383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen * 02110-1301 USA 20383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen * 21383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen */ 22383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen 23383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen#include <linux/mfd/wl1273-core.h> 24383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen#include <linux/slab.h> 25383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen 26383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen#define DRIVER_DESC "WL1273 FM Radio Core" 27383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen 28383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonenstatic struct i2c_device_id wl1273_driver_id_table[] = { 29383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen { WL1273_FM_DRIVER_NAME, 0 }, 30383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen { } 31383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen}; 32383268a8e282fb549dabe3a33ccafc9434ab6006Matti AaltonenMODULE_DEVICE_TABLE(i2c, wl1273_driver_id_table); 33383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen 34383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonenstatic int wl1273_core_remove(struct i2c_client *client) 35383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen{ 36383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen struct wl1273_core *core = i2c_get_clientdata(client); 37383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen 38383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen dev_dbg(&client->dev, "%s\n", __func__); 39383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen 40383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen mfd_remove_devices(&client->dev); 41383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen i2c_set_clientdata(client, NULL); 42383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen kfree(core); 43383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen 44383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen return 0; 45383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen} 46383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen 47383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonenstatic int __devinit wl1273_core_probe(struct i2c_client *client, 48383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen const struct i2c_device_id *id) 49383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen{ 50383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen struct wl1273_fm_platform_data *pdata = client->dev.platform_data; 51383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen struct wl1273_core *core; 52383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen struct mfd_cell *cell; 53383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen int children = 0; 54383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen int r = 0; 55383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen 56383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen dev_dbg(&client->dev, "%s\n", __func__); 57383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen 58383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen if (!pdata) { 59383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen dev_err(&client->dev, "No platform data.\n"); 60383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen return -EINVAL; 61383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen } 62383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen 63383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen if (!(pdata->children & WL1273_RADIO_CHILD)) { 64383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen dev_err(&client->dev, "Cannot function without radio child.\n"); 65383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen return -EINVAL; 66383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen } 67383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen 68383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen core = kzalloc(sizeof(*core), GFP_KERNEL); 69383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen if (!core) 70383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen return -ENOMEM; 71383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen 72383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen core->pdata = pdata; 73383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen core->client = client; 74383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen mutex_init(&core->lock); 75383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen 76383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen i2c_set_clientdata(client, core); 77383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen 78383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen dev_dbg(&client->dev, "%s: Have V4L2.\n", __func__); 79383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen 80383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen cell = &core->cells[children]; 81383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen cell->name = "wl1273_fm_radio"; 82383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen cell->platform_data = &core; 83383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen cell->data_size = sizeof(core); 84383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen children++; 85383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen 86383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen if (pdata->children & WL1273_CODEC_CHILD) { 87383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen cell = &core->cells[children]; 88383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen 89383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen dev_dbg(&client->dev, "%s: Have codec.\n", __func__); 90383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen cell->name = "wl1273-codec"; 91383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen cell->platform_data = &core; 92383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen cell->data_size = sizeof(core); 93383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen children++; 94383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen } 95383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen 96383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen dev_dbg(&client->dev, "%s: number of children: %d.\n", 97383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen __func__, children); 98383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen 99383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen r = mfd_add_devices(&client->dev, -1, core->cells, 100383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen children, NULL, 0); 101383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen if (r) 102383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen goto err; 103383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen 104383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen return 0; 105383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen 106383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonenerr: 107383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen i2c_set_clientdata(client, NULL); 108383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen pdata->free_resources(); 109383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen kfree(core); 110383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen 111383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen dev_dbg(&client->dev, "%s\n", __func__); 112383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen 113383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen return r; 114383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen} 115383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen 116383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonenstatic struct i2c_driver wl1273_core_driver = { 117383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen .driver = { 118383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen .name = WL1273_FM_DRIVER_NAME, 119383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen }, 120383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen .probe = wl1273_core_probe, 121383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen .id_table = wl1273_driver_id_table, 122383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen .remove = __devexit_p(wl1273_core_remove), 123383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen}; 124383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen 125383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonenstatic int __init wl1273_core_init(void) 126383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen{ 127383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen int r; 128383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen 129383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen r = i2c_add_driver(&wl1273_core_driver); 130383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen if (r) { 131383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen pr_err(WL1273_FM_DRIVER_NAME 132383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen ": driver registration failed\n"); 133383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen return r; 134383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen } 135383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen 136383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen return r; 137383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen} 138383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen 139383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonenstatic void __exit wl1273_core_exit(void) 140383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen{ 141383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen i2c_del_driver(&wl1273_core_driver); 142383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen} 143383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonenlate_initcall(wl1273_core_init); 144383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonenmodule_exit(wl1273_core_exit); 145383268a8e282fb549dabe3a33ccafc9434ab6006Matti Aaltonen 146383268a8e282fb549dabe3a33ccafc9434ab6006Matti AaltonenMODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>"); 147383268a8e282fb549dabe3a33ccafc9434ab6006Matti AaltonenMODULE_DESCRIPTION(DRIVER_DESC); 148383268a8e282fb549dabe3a33ccafc9434ab6006Matti AaltonenMODULE_LICENSE("GPL"); 149