mirror of
https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-09-10 01:12:45 -04:00
Fixed MTP to work with TWRP
This commit is contained in:
awab228
commit
f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
526
drivers/media/radio/si470x/radio-si470x-i2c.c
Normal file
526
drivers/media/radio/si470x/radio-si470x-i2c.c
Normal file
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|
@ -0,0 +1,526 @@
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/*
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* drivers/media/radio/si470x/radio-si470x-i2c.c
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*
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* I2C driver for radios with Silicon Labs Si470x FM Radio Receivers
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*
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* Copyright (c) 2009 Samsung Electronics Co.Ltd
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* Author: Joonyoung Shim <jy0922.shim@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
|
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* the Free Software Foundation; either version 2 of the License, or
|
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* 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.
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||||
*
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* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* driver definitions */
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#define DRIVER_AUTHOR "Joonyoung Shim <jy0922.shim@samsung.com>";
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#define DRIVER_CARD "Silicon Labs Si470x FM Radio Receiver"
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#define DRIVER_DESC "I2C radio driver for Si470x FM Radio Receivers"
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#define DRIVER_VERSION "1.0.2"
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/* kernel includes */
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#include <linux/i2c.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include "radio-si470x.h"
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/* I2C Device ID List */
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static const struct i2c_device_id si470x_i2c_id[] = {
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/* Generic Entry */
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{ "si470x", 0 },
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/* Terminating entry */
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, si470x_i2c_id);
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/**************************************************************************
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* Module Parameters
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**************************************************************************/
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/* Radio Nr */
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static int radio_nr = -1;
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module_param(radio_nr, int, 0444);
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MODULE_PARM_DESC(radio_nr, "Radio Nr");
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/* RDS buffer blocks */
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static unsigned int rds_buf = 100;
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module_param(rds_buf, uint, 0444);
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MODULE_PARM_DESC(rds_buf, "RDS buffer entries: *100*");
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/* RDS maximum block errors */
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static unsigned short max_rds_errors = 1;
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/* 0 means 0 errors requiring correction */
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/* 1 means 1-2 errors requiring correction (used by original USBRadio.exe) */
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/* 2 means 3-5 errors requiring correction */
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/* 3 means 6+ errors or errors in checkword, correction not possible */
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module_param(max_rds_errors, ushort, 0644);
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MODULE_PARM_DESC(max_rds_errors, "RDS maximum block errors: *1*");
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/**************************************************************************
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* I2C Definitions
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**************************************************************************/
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/* Write starts with the upper byte of register 0x02 */
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#define WRITE_REG_NUM 8
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#define WRITE_INDEX(i) (i + 0x02)
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/* Read starts with the upper byte of register 0x0a */
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#define READ_REG_NUM RADIO_REGISTER_NUM
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#define READ_INDEX(i) ((i + RADIO_REGISTER_NUM - 0x0a) % READ_REG_NUM)
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/**************************************************************************
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* General Driver Functions - REGISTERs
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**************************************************************************/
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/*
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* si470x_get_register - read register
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*/
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int si470x_get_register(struct si470x_device *radio, int regnr)
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{
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u16 buf[READ_REG_NUM];
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struct i2c_msg msgs[1] = {
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{
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.addr = radio->client->addr,
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.flags = I2C_M_RD,
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.len = sizeof(u16) * READ_REG_NUM,
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.buf = (void *)buf
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},
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};
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if (i2c_transfer(radio->client->adapter, msgs, 1) != 1)
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return -EIO;
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radio->registers[regnr] = __be16_to_cpu(buf[READ_INDEX(regnr)]);
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return 0;
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}
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/*
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* si470x_set_register - write register
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*/
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int si470x_set_register(struct si470x_device *radio, int regnr)
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{
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int i;
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u16 buf[WRITE_REG_NUM];
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struct i2c_msg msgs[1] = {
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{
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.addr = radio->client->addr,
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.len = sizeof(u16) * WRITE_REG_NUM,
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.buf = (void *)buf
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},
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};
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for (i = 0; i < WRITE_REG_NUM; i++)
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buf[i] = __cpu_to_be16(radio->registers[WRITE_INDEX(i)]);
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if (i2c_transfer(radio->client->adapter, msgs, 1) != 1)
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return -EIO;
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return 0;
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}
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/**************************************************************************
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* General Driver Functions - ENTIRE REGISTERS
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**************************************************************************/
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/*
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* si470x_get_all_registers - read entire registers
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*/
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static int si470x_get_all_registers(struct si470x_device *radio)
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{
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int i;
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u16 buf[READ_REG_NUM];
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struct i2c_msg msgs[1] = {
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{
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.addr = radio->client->addr,
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.flags = I2C_M_RD,
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.len = sizeof(u16) * READ_REG_NUM,
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.buf = (void *)buf
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},
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};
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if (i2c_transfer(radio->client->adapter, msgs, 1) != 1)
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return -EIO;
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for (i = 0; i < READ_REG_NUM; i++)
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radio->registers[i] = __be16_to_cpu(buf[READ_INDEX(i)]);
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return 0;
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}
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/**************************************************************************
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* File Operations Interface
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**************************************************************************/
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/*
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* si470x_fops_open - file open
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||||
*/
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int si470x_fops_open(struct file *file)
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{
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struct si470x_device *radio = video_drvdata(file);
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int retval = v4l2_fh_open(file);
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if (retval)
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return retval;
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if (v4l2_fh_is_singular_file(file)) {
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/* start radio */
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retval = si470x_start(radio);
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if (retval < 0)
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goto done;
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/* enable RDS / STC interrupt */
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radio->registers[SYSCONFIG1] |= SYSCONFIG1_RDSIEN;
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radio->registers[SYSCONFIG1] |= SYSCONFIG1_STCIEN;
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radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_GPIO2;
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radio->registers[SYSCONFIG1] |= 0x1 << 2;
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retval = si470x_set_register(radio, SYSCONFIG1);
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}
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done:
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if (retval)
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v4l2_fh_release(file);
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return retval;
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}
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/*
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* si470x_fops_release - file release
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*/
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int si470x_fops_release(struct file *file)
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{
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struct si470x_device *radio = video_drvdata(file);
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if (v4l2_fh_is_singular_file(file))
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/* stop radio */
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si470x_stop(radio);
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return v4l2_fh_release(file);
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}
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/**************************************************************************
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* Video4Linux Interface
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**************************************************************************/
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/*
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* si470x_vidioc_querycap - query device capabilities
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*/
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int si470x_vidioc_querycap(struct file *file, void *priv,
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struct v4l2_capability *capability)
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{
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strlcpy(capability->driver, DRIVER_NAME, sizeof(capability->driver));
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strlcpy(capability->card, DRIVER_CARD, sizeof(capability->card));
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capability->device_caps = V4L2_CAP_HW_FREQ_SEEK | V4L2_CAP_READWRITE |
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V4L2_CAP_TUNER | V4L2_CAP_RADIO | V4L2_CAP_RDS_CAPTURE;
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capability->capabilities = capability->device_caps | V4L2_CAP_DEVICE_CAPS;
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return 0;
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}
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/**************************************************************************
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* I2C Interface
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**************************************************************************/
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/*
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* si470x_i2c_interrupt - interrupt handler
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*/
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static irqreturn_t si470x_i2c_interrupt(int irq, void *dev_id)
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{
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struct si470x_device *radio = dev_id;
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unsigned char regnr;
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unsigned char blocknum;
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unsigned short bler; /* rds block errors */
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unsigned short rds;
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unsigned char tmpbuf[3];
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int retval = 0;
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/* check Seek/Tune Complete */
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retval = si470x_get_register(radio, STATUSRSSI);
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if (retval < 0)
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goto end;
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if (radio->registers[STATUSRSSI] & STATUSRSSI_STC)
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complete(&radio->completion);
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/* safety checks */
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if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0)
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goto end;
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/* Update RDS registers */
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for (regnr = 1; regnr < RDS_REGISTER_NUM; regnr++) {
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retval = si470x_get_register(radio, STATUSRSSI + regnr);
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if (retval < 0)
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goto end;
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}
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/* get rds blocks */
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if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSR) == 0)
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/* No RDS group ready, better luck next time */
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goto end;
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for (blocknum = 0; blocknum < 4; blocknum++) {
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switch (blocknum) {
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default:
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bler = (radio->registers[STATUSRSSI] &
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STATUSRSSI_BLERA) >> 9;
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rds = radio->registers[RDSA];
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break;
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case 1:
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bler = (radio->registers[READCHAN] &
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READCHAN_BLERB) >> 14;
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rds = radio->registers[RDSB];
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break;
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case 2:
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bler = (radio->registers[READCHAN] &
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READCHAN_BLERC) >> 12;
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rds = radio->registers[RDSC];
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break;
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case 3:
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bler = (radio->registers[READCHAN] &
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READCHAN_BLERD) >> 10;
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rds = radio->registers[RDSD];
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break;
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}
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||||
/* Fill the V4L2 RDS buffer */
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put_unaligned_le16(rds, &tmpbuf);
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tmpbuf[2] = blocknum; /* offset name */
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tmpbuf[2] |= blocknum << 3; /* received offset */
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||||
if (bler > max_rds_errors)
|
||||
tmpbuf[2] |= 0x80; /* uncorrectable errors */
|
||||
else if (bler > 0)
|
||||
tmpbuf[2] |= 0x40; /* corrected error(s) */
|
||||
|
||||
/* copy RDS block to internal buffer */
|
||||
memcpy(&radio->buffer[radio->wr_index], &tmpbuf, 3);
|
||||
radio->wr_index += 3;
|
||||
|
||||
/* wrap write pointer */
|
||||
if (radio->wr_index >= radio->buf_size)
|
||||
radio->wr_index = 0;
|
||||
|
||||
/* check for overflow */
|
||||
if (radio->wr_index == radio->rd_index) {
|
||||
/* increment and wrap read pointer */
|
||||
radio->rd_index += 3;
|
||||
if (radio->rd_index >= radio->buf_size)
|
||||
radio->rd_index = 0;
|
||||
}
|
||||
}
|
||||
|
||||
if (radio->wr_index != radio->rd_index)
|
||||
wake_up_interruptible(&radio->read_queue);
|
||||
|
||||
end:
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* si470x_i2c_probe - probe for the device
|
||||
*/
|
||||
static int si470x_i2c_probe(struct i2c_client *client,
|
||||
const struct i2c_device_id *id)
|
||||
{
|
||||
struct si470x_device *radio;
|
||||
int retval = 0;
|
||||
unsigned char version_warning = 0;
|
||||
|
||||
/* private data allocation and initialization */
|
||||
radio = kzalloc(sizeof(struct si470x_device), GFP_KERNEL);
|
||||
if (!radio) {
|
||||
retval = -ENOMEM;
|
||||
goto err_initial;
|
||||
}
|
||||
|
||||
radio->client = client;
|
||||
radio->band = 1; /* Default to 76 - 108 MHz */
|
||||
mutex_init(&radio->lock);
|
||||
init_completion(&radio->completion);
|
||||
|
||||
/* video device initialization */
|
||||
radio->videodev = si470x_viddev_template;
|
||||
video_set_drvdata(&radio->videodev, radio);
|
||||
|
||||
/* power up : need 110ms */
|
||||
radio->registers[POWERCFG] = POWERCFG_ENABLE;
|
||||
if (si470x_set_register(radio, POWERCFG) < 0) {
|
||||
retval = -EIO;
|
||||
goto err_radio;
|
||||
}
|
||||
msleep(110);
|
||||
|
||||
/* get device and chip versions */
|
||||
if (si470x_get_all_registers(radio) < 0) {
|
||||
retval = -EIO;
|
||||
goto err_radio;
|
||||
}
|
||||
dev_info(&client->dev, "DeviceID=0x%4.4hx ChipID=0x%4.4hx\n",
|
||||
radio->registers[DEVICEID], radio->registers[CHIPID]);
|
||||
if ((radio->registers[CHIPID] & CHIPID_FIRMWARE) < RADIO_FW_VERSION) {
|
||||
dev_warn(&client->dev,
|
||||
"This driver is known to work with "
|
||||
"firmware version %hu,\n", RADIO_FW_VERSION);
|
||||
dev_warn(&client->dev,
|
||||
"but the device has firmware version %hu.\n",
|
||||
radio->registers[CHIPID] & CHIPID_FIRMWARE);
|
||||
version_warning = 1;
|
||||
}
|
||||
|
||||
/* give out version warning */
|
||||
if (version_warning == 1) {
|
||||
dev_warn(&client->dev,
|
||||
"If you have some trouble using this driver,\n");
|
||||
dev_warn(&client->dev,
|
||||
"please report to V4L ML at "
|
||||
"linux-media@vger.kernel.org\n");
|
||||
}
|
||||
|
||||
/* set initial frequency */
|
||||
si470x_set_freq(radio, 87.5 * FREQ_MUL); /* available in all regions */
|
||||
|
||||
/* rds buffer allocation */
|
||||
radio->buf_size = rds_buf * 3;
|
||||
radio->buffer = kmalloc(radio->buf_size, GFP_KERNEL);
|
||||
if (!radio->buffer) {
|
||||
retval = -EIO;
|
||||
goto err_radio;
|
||||
}
|
||||
|
||||
/* rds buffer configuration */
|
||||
radio->wr_index = 0;
|
||||
radio->rd_index = 0;
|
||||
init_waitqueue_head(&radio->read_queue);
|
||||
|
||||
retval = request_threaded_irq(client->irq, NULL, si470x_i2c_interrupt,
|
||||
IRQF_TRIGGER_FALLING, DRIVER_NAME, radio);
|
||||
if (retval) {
|
||||
dev_err(&client->dev, "Failed to register interrupt\n");
|
||||
goto err_rds;
|
||||
}
|
||||
|
||||
/* register video device */
|
||||
retval = video_register_device(&radio->videodev, VFL_TYPE_RADIO,
|
||||
radio_nr);
|
||||
if (retval) {
|
||||
dev_warn(&client->dev, "Could not register video device\n");
|
||||
goto err_all;
|
||||
}
|
||||
i2c_set_clientdata(client, radio);
|
||||
|
||||
return 0;
|
||||
err_all:
|
||||
free_irq(client->irq, radio);
|
||||
err_rds:
|
||||
kfree(radio->buffer);
|
||||
err_radio:
|
||||
kfree(radio);
|
||||
err_initial:
|
||||
return retval;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* si470x_i2c_remove - remove the device
|
||||
*/
|
||||
static int si470x_i2c_remove(struct i2c_client *client)
|
||||
{
|
||||
struct si470x_device *radio = i2c_get_clientdata(client);
|
||||
|
||||
free_irq(client->irq, radio);
|
||||
video_unregister_device(&radio->videodev);
|
||||
kfree(radio);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
#ifdef CONFIG_PM_SLEEP
|
||||
/*
|
||||
* si470x_i2c_suspend - suspend the device
|
||||
*/
|
||||
static int si470x_i2c_suspend(struct device *dev)
|
||||
{
|
||||
struct i2c_client *client = to_i2c_client(dev);
|
||||
struct si470x_device *radio = i2c_get_clientdata(client);
|
||||
|
||||
/* power down */
|
||||
radio->registers[POWERCFG] |= POWERCFG_DISABLE;
|
||||
if (si470x_set_register(radio, POWERCFG) < 0)
|
||||
return -EIO;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* si470x_i2c_resume - resume the device
|
||||
*/
|
||||
static int si470x_i2c_resume(struct device *dev)
|
||||
{
|
||||
struct i2c_client *client = to_i2c_client(dev);
|
||||
struct si470x_device *radio = i2c_get_clientdata(client);
|
||||
|
||||
/* power up : need 110ms */
|
||||
radio->registers[POWERCFG] |= POWERCFG_ENABLE;
|
||||
if (si470x_set_register(radio, POWERCFG) < 0)
|
||||
return -EIO;
|
||||
msleep(110);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static SIMPLE_DEV_PM_OPS(si470x_i2c_pm, si470x_i2c_suspend, si470x_i2c_resume);
|
||||
#endif
|
||||
|
||||
|
||||
/*
|
||||
* si470x_i2c_driver - i2c driver interface
|
||||
*/
|
||||
static struct i2c_driver si470x_i2c_driver = {
|
||||
.driver = {
|
||||
.name = "si470x",
|
||||
.owner = THIS_MODULE,
|
||||
#ifdef CONFIG_PM_SLEEP
|
||||
.pm = &si470x_i2c_pm,
|
||||
#endif
|
||||
},
|
||||
.probe = si470x_i2c_probe,
|
||||
.remove = si470x_i2c_remove,
|
||||
.id_table = si470x_i2c_id,
|
||||
};
|
||||
|
||||
module_i2c_driver(si470x_i2c_driver);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_AUTHOR(DRIVER_AUTHOR);
|
||||
MODULE_DESCRIPTION(DRIVER_DESC);
|
||||
MODULE_VERSION(DRIVER_VERSION);
|
||||
Loading…
Add table
Add a link
Reference in a new issue