1 files changed, 634 insertions, 0 deletions

diff --git a/drivers/media/radio/radio-tea5764.c b/drivers/media/radio/radio-tea5764.c
new file mode 100644
index 000000000000..4d35308fc1ff
--- /dev/null
+++ b/drivers/media/radio/radio-tea5764.c
@@ -0,0 +1,634 @@
+/*
+ * driver/media/radio/radio-tea5764.c
+ *
+ * Driver for TEA5764 radio chip for linux 2.6.
+ * This driver is for TEA5764 chip from NXP, used in EZX phones from Motorola.
+ * The I2C protocol is used for communicate with chip.
+ *
+ * Based in radio-tea5761.c Copyright (C) 2005 Nokia Corporation
+ *
+ *  Copyright (c) 2008 Fabio Belavenuto <belavenuto@gmail.com>
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * History:
+ * 2008-12-06   Fabio Belavenuto <belavenuto@gmail.com>
+ *              initial code
+ *
+ * TODO:
+ *  add platform_data support for IRQs platform dependencies
+ *  add RDS support
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>                 /* Initdata                     */
+#include <linux/videodev2.h>            /* kernel radio structs         */
+#include <linux/i2c.h>                  /* I2C                          */
+#include <media/v4l2-common.h>
+#include <media/v4l2-ioctl.h>
+#include <linux/version.h>              /* for KERNEL_VERSION MACRO     */
+
+#define DRIVER_VERSION  "v0.01"
+#define RADIO_VERSION   KERNEL_VERSION(0, 0, 1)
+
+#define DRIVER_AUTHOR   "Fabio Belavenuto <belavenuto@gmail.com>"
+#define DRIVER_DESC     "A driver for the TEA5764 radio chip for EZX Phones."
+
+#define PINFO(format, ...)\
+        printk(KERN_INFO KBUILD_MODNAME ": "\
+                DRIVER_VERSION ": " format "\n", ## __VA_ARGS__)
+#define PWARN(format, ...)\
+        printk(KERN_WARNING KBUILD_MODNAME ": "\
+                DRIVER_VERSION ": " format "\n", ## __VA_ARGS__)
+# define PDEBUG(format, ...)\
+        printk(KERN_DEBUG KBUILD_MODNAME ": "\
+                DRIVER_VERSION ": " format "\n", ## __VA_ARGS__)
+
+/* Frequency limits in MHz -- these are European values.  For Japanese
+devices, that would be 76000 and 91000.  */
+#define FREQ_MIN  87500
+#define FREQ_MAX 108000
+#define FREQ_MUL 16
+
+/* TEA5764 registers */
+#define TEA5764_MANID           0x002b
+#define TEA5764_CHIPID          0x5764
+
+#define TEA5764_INTREG_BLMSK    0x0001
+#define TEA5764_INTREG_FRRMSK   0x0002
+#define TEA5764_INTREG_LEVMSK   0x0008
+#define TEA5764_INTREG_IFMSK    0x0010
+#define TEA5764_INTREG_BLMFLAG  0x0100
+#define TEA5764_INTREG_FRRFLAG  0x0200
+#define TEA5764_INTREG_LEVFLAG  0x0800
+#define TEA5764_INTREG_IFFLAG   0x1000
+
+#define TEA5764_FRQSET_SUD      0x8000
+#define TEA5764_FRQSET_SM       0x4000
+
+#define TEA5764_TNCTRL_PUPD1    0x8000
+#define TEA5764_TNCTRL_PUPD0    0x4000
+#define TEA5764_TNCTRL_BLIM     0x2000
+#define TEA5764_TNCTRL_SWPM     0x1000
+#define TEA5764_TNCTRL_IFCTC    0x0800
+#define TEA5764_TNCTRL_AFM      0x0400
+#define TEA5764_TNCTRL_SMUTE    0x0200
+#define TEA5764_TNCTRL_SNC      0x0100
+#define TEA5764_TNCTRL_MU       0x0080
+#define TEA5764_TNCTRL_SSL1     0x0040
+#define TEA5764_TNCTRL_SSL0     0x0020
+#define TEA5764_TNCTRL_HLSI     0x0010
+#define TEA5764_TNCTRL_MST      0x0008
+#define TEA5764_TNCTRL_SWP      0x0004
+#define TEA5764_TNCTRL_DTC      0x0002
+#define TEA5764_TNCTRL_AHLSI    0x0001
+
+#define TEA5764_TUNCHK_LEVEL(x) (((x) & 0x00F0) >> 4)
+#define TEA5764_TUNCHK_IFCNT(x) (((x) & 0xFE00) >> 9)
+#define TEA5764_TUNCHK_TUNTO    0x0100
+#define TEA5764_TUNCHK_LD       0x0008
+#define TEA5764_TUNCHK_STEREO   0x0004
+
+#define TEA5764_TESTREG_TRIGFR  0x0800
+
+struct tea5764_regs {
+        u16 intreg;                             /* INTFLAG & INTMSK */
+        u16 frqset;                             /* FRQSETMSB & FRQSETLSB */
+        u16 tnctrl;                             /* TNCTRL1 & TNCTRL2 */
+        u16 frqchk;                             /* FRQCHKMSB & FRQCHKLSB */
+        u16 tunchk;                             /* IFCHK & LEVCHK */
+        u16 testreg;                            /* TESTBITS & TESTMODE */
+        u16 rdsstat;                            /* RDSSTAT1 & RDSSTAT2 */
+        u16 rdslb;                              /* RDSLBMSB & RDSLBLSB */
+        u16 rdspb;                              /* RDSPBMSB & RDSPBLSB */
+        u16 rdsbc;                              /* RDSBBC & RDSGBC */
+        u16 rdsctrl;                            /* RDSCTRL1 & RDSCTRL2 */
+        u16 rdsbbl;                             /* PAUSEDET & RDSBBL */
+        u16 manid;                              /* MANID1 & MANID2 */
+        u16 chipid;                             /* CHIPID1 & CHIPID2 */
+} __attribute__ ((packed));
+
+struct tea5764_write_regs {
+        u8 intreg;                              /* INTMSK */
+        u16 frqset;                             /* FRQSETMSB & FRQSETLSB */
+        u16 tnctrl;                             /* TNCTRL1 & TNCTRL2 */
+        u16 testreg;                            /* TESTBITS & TESTMODE */
+        u16 rdsctrl;                            /* RDSCTRL1 & RDSCTRL2 */
+        u16 rdsbbl;                             /* PAUSEDET & RDSBBL */
+} __attribute__ ((packed));
+
+#ifndef RADIO_TEA5764_XTAL
+#define RADIO_TEA5764_XTAL 1
+#endif
+
+static int radio_nr = -1;
+static int use_xtal = RADIO_TEA5764_XTAL;
+
+struct tea5764_device {
+        struct i2c_client               *i2c_client;
+        struct video_device             *videodev;
+        struct tea5764_regs             regs;
+        struct mutex                    mutex;
+        int                             users;
+};
+
+/* I2C code related */
+int tea5764_i2c_read(struct tea5764_device *radio)
+{
+        int i;
+        u16 *p = (u16 *) &radio->regs;
+
+        struct i2c_msg msgs[1] = {
+                { radio->i2c_client->addr, I2C_M_RD, sizeof(radio->regs),
+                        (void *)&radio->regs },
+        };
+        if (i2c_transfer(radio->i2c_client->adapter, msgs, 1) != 1)
+                return -EIO;
+        for (i = 0; i < sizeof(struct tea5764_regs) / sizeof(u16); i++)
+                p[i] = __be16_to_cpu(p[i]);
+
+        return 0;
+}
+
+int tea5764_i2c_write(struct tea5764_device *radio)
+{
+        struct tea5764_write_regs wr;
+        struct tea5764_regs *r = &radio->regs;
+        struct i2c_msg msgs[1] = {
+                { radio->i2c_client->addr, 0, sizeof(wr), (void *) &wr },
+        };
+        wr.intreg  = r->intreg & 0xff;
+        wr.frqset  = __cpu_to_be16(r->frqset);
+        wr.tnctrl  = __cpu_to_be16(r->tnctrl);
+        wr.testreg = __cpu_to_be16(r->testreg);
+        wr.rdsctrl = __cpu_to_be16(r->rdsctrl);
+        wr.rdsbbl  = __cpu_to_be16(r->rdsbbl);
+        if (i2c_transfer(radio->i2c_client->adapter, msgs, 1) != 1)
+                return -EIO;
+        return 0;
+}
+
+/* V4L2 code related */
+static struct v4l2_queryctrl radio_qctrl[] = {
+        {
+                .id            = V4L2_CID_AUDIO_MUTE,
+                .name          = "Mute",
+                .minimum       = 0,
+                .maximum       = 1,
+                .default_value = 1,
+                .type          = V4L2_CTRL_TYPE_BOOLEAN,
+        }
+};
+
+static void tea5764_power_up(struct tea5764_device *radio)
+{
+        struct tea5764_regs *r = &radio->regs;
+
+        if (!(r->tnctrl & TEA5764_TNCTRL_PUPD0)) {
+                r->tnctrl &= ~(TEA5764_TNCTRL_AFM | TEA5764_TNCTRL_MU |
+                               TEA5764_TNCTRL_HLSI);
+                if (!use_xtal)
+                        r->testreg |= TEA5764_TESTREG_TRIGFR;
+                else
+                        r->testreg &= ~TEA5764_TESTREG_TRIGFR;
+
+                r->tnctrl |= TEA5764_TNCTRL_PUPD0;
+                tea5764_i2c_write(radio);
+        }
+}
+
+static void tea5764_power_down(struct tea5764_device *radio)
+{
+        struct tea5764_regs *r = &radio->regs;
+
+        if (r->tnctrl & TEA5764_TNCTRL_PUPD0) {
+                r->tnctrl &= ~TEA5764_TNCTRL_PUPD0;
+                tea5764_i2c_write(radio);
+        }
+}
+
+static void tea5764_set_freq(struct tea5764_device *radio, int freq)
+{
+        struct tea5764_regs *r = &radio->regs;
+
+        /* formula: (freq [+ or -] 225000) / 8192 */
+        if (r->tnctrl & TEA5764_TNCTRL_HLSI)
+                r->frqset = (freq + 225000) / 8192;
+        else
+                r->frqset = (freq - 225000) / 8192;
+}
+
+static int tea5764_get_freq(struct tea5764_device *radio)
+{
+        struct tea5764_regs *r = &radio->regs;
+
+        if (r->tnctrl & TEA5764_TNCTRL_HLSI)
+                return (r->frqchk * 8192) - 225000;
+        else
+                return (r->frqchk * 8192) + 225000;
+}
+
+/* tune an frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */
+static void tea5764_tune(struct tea5764_device *radio, int freq)
+{
+        tea5764_set_freq(radio, freq);
+        if (tea5764_i2c_write(radio))
+                PWARN("Could not set frequency!");
+}
+
+static void tea5764_set_audout_mode(struct tea5764_device *radio, int audmode)
+{
+        struct tea5764_regs *r = &radio->regs;
+        int tnctrl = r->tnctrl;
+
+        if (audmode == V4L2_TUNER_MODE_MONO)
+                r->tnctrl |= TEA5764_TNCTRL_MST;
+        else
+                r->tnctrl &= ~TEA5764_TNCTRL_MST;
+        if (tnctrl != r->tnctrl)
+                tea5764_i2c_write(radio);
+}
+
+static int tea5764_get_audout_mode(struct tea5764_device *radio)
+{
+        struct tea5764_regs *r = &radio->regs;
+
+        if (r->tnctrl & TEA5764_TNCTRL_MST)
+                return V4L2_TUNER_MODE_MONO;
+        else
+                return V4L2_TUNER_MODE_STEREO;
+}
+
+static void tea5764_mute(struct tea5764_device *radio, int on)
+{
+        struct tea5764_regs *r = &radio->regs;
+        int tnctrl = r->tnctrl;
+
+        if (on)
+                r->tnctrl |= TEA5764_TNCTRL_MU;
+        else
+                r->tnctrl &= ~TEA5764_TNCTRL_MU;
+        if (tnctrl != r->tnctrl)
+                tea5764_i2c_write(radio);
+}
+
+static int tea5764_is_muted(struct tea5764_device *radio)
+{
+        return radio->regs.tnctrl & TEA5764_TNCTRL_MU;
+}
+
+/* V4L2 vidioc */
+static int vidioc_querycap(struct file *file, void  *priv,
+                                        struct v4l2_capability *v)
+{
+        struct tea5764_device *radio = video_drvdata(file);
+        struct video_device *dev = radio->videodev;
+
+        strlcpy(v->driver, dev->dev.driver->name, sizeof(v->driver));
+        strlcpy(v->card, dev->name, sizeof(v->card));
+        snprintf(v->bus_info, sizeof(v->bus_info), "I2C:%s", dev->dev.bus_id);
+        v->version = RADIO_VERSION;
+        v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
+        return 0;
+}
+
+static int vidioc_g_tuner(struct file *file, void *priv,
+                                struct v4l2_tuner *v)
+{
+        struct tea5764_device *radio = video_drvdata(file);
+        struct tea5764_regs *r = &radio->regs;
+
+        if (v->index > 0)
+                return -EINVAL;
+
+        memset(v, 0, sizeof(v));
+        strcpy(v->name, "FM");
+        v->type = V4L2_TUNER_RADIO;
+        tea5764_i2c_read(radio);
+        v->rangelow   = FREQ_MIN * FREQ_MUL;
+        v->rangehigh  = FREQ_MAX * FREQ_MUL;
+        v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
+        if (r->tunchk & TEA5764_TUNCHK_STEREO)
+                        v->rxsubchans = V4L2_TUNER_SUB_STEREO;
+        v->audmode = tea5764_get_audout_mode(radio);
+        v->signal = TEA5764_TUNCHK_LEVEL(r->tunchk) * 0xffff / 0xf;
+        v->afc = TEA5764_TUNCHK_IFCNT(r->tunchk);
+
+        return 0;
+}
+
+static int vidioc_s_tuner(struct file *file, void *priv,
+                                struct v4l2_tuner *v)
+{
+        struct tea5764_device *radio = video_drvdata(file);
+
+        if (v->index > 0)
+                return -EINVAL;
+
+        tea5764_set_audout_mode(radio, v->audmode);
+        return 0;
+}
+
+static int vidioc_s_frequency(struct file *file, void *priv,
+                                struct v4l2_frequency *f)
+{
+        struct tea5764_device *radio = video_drvdata(file);
+
+        if (f->tuner != 0)
+                return -EINVAL;
+        if (f->frequency == 0) {
+                /* We special case this as a power down control. */
+                tea5764_power_down(radio);
+        }
+        if (f->frequency < (FREQ_MIN * FREQ_MUL))
+                return -EINVAL;
+        if (f->frequency > (FREQ_MAX * FREQ_MUL))
+                return -EINVAL;
+        tea5764_power_up(radio);
+        tea5764_tune(radio, (f->frequency * 125) / 2);
+        return 0;
+}
+
+static int vidioc_g_frequency(struct file *file, void *priv,
+                                struct v4l2_frequency *f)
+{
+        struct tea5764_device *radio = video_drvdata(file);
+        struct tea5764_regs *r = &radio->regs;
+
+        tea5764_i2c_read(radio);
+        memset(f, 0, sizeof(f));
+        f->type = V4L2_TUNER_RADIO;
+        if (r->tnctrl & TEA5764_TNCTRL_PUPD0)
+                f->frequency = (tea5764_get_freq(radio) * 2) / 125;
+        else
+                f->frequency = 0;
+
+        return 0;
+}
+
+static int vidioc_queryctrl(struct file *file, void *priv,
+                            struct v4l2_queryctrl *qc)
+{
+        int i;
+
+        for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
+                if (qc->id && qc->id == radio_qctrl[i].id) {
+                        memcpy(qc, &(radio_qctrl[i]), sizeof(*qc));
+                        return 0;
+                }
+        }
+        return -EINVAL;
+}
+
+static int vidioc_g_ctrl(struct file *file, void *priv,
+                            struct v4l2_control *ctrl)
+{
+        struct tea5764_device *radio = video_drvdata(file);
+
+        switch (ctrl->id) {
+        case V4L2_CID_AUDIO_MUTE:
+                tea5764_i2c_read(radio);
+                ctrl->value = tea5764_is_muted(radio) ? 1 : 0;
+                return 0;
+        }
+        return -EINVAL;
+}
+
+static int vidioc_s_ctrl(struct file *file, void *priv,
+                            struct v4l2_control *ctrl)
+{
+        struct tea5764_device *radio = video_drvdata(file);
+
+        switch (ctrl->id) {
+        case V4L2_CID_AUDIO_MUTE:
+                tea5764_mute(radio, ctrl->value);
+                return 0;
+        }
+        return -EINVAL;
+}
+
+static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
+{
+        *i = 0;
+        return 0;
+}
+
+static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
+{
+        if (i != 0)
+                return -EINVAL;
+        return 0;
+}
+
+static int vidioc_g_audio(struct file *file, void *priv,
+                           struct v4l2_audio *a)
+{
+        if (a->index > 1)
+                return -EINVAL;
+
+        strcpy(a->name, "Radio");
+        a->capability = V4L2_AUDCAP_STEREO;
+        return 0;
+}
+
+static int vidioc_s_audio(struct file *file, void *priv,
+                           struct v4l2_audio *a)
+{
+        if (a->index != 0)
+                return -EINVAL;
+
+        return 0;
+}
+
+static int tea5764_open(struct file *file)
+{
+        /* Currently we support only one device */
+        int minor = video_devdata(file)->minor;
+        struct tea5764_device *radio = video_drvdata(file);
+
+        if (radio->videodev->minor != minor)
+                return -ENODEV;
+
+        mutex_lock(&radio->mutex);
+        /* Only exclusive access */
+        if (radio->users) {
+                mutex_unlock(&radio->mutex);
+                return -EBUSY;
+        }
+        radio->users++;
+        mutex_unlock(&radio->mutex);
+        file->private_data = radio;
+        return 0;
+}
+
+static int tea5764_close(struct file *file)
+{
+        struct tea5764_device *radio = video_drvdata(file);
+
+        if (!radio)
+                return -ENODEV;
+        mutex_lock(&radio->mutex);
+        radio->users--;
+        mutex_unlock(&radio->mutex);
+        return 0;
+}
+
+/* File system interface */
+static const struct v4l2_file_operations tea5764_fops = {
+        .owner          = THIS_MODULE,
+        .open           = tea5764_open,
+        .release        = tea5764_close,
+        .ioctl          = video_ioctl2,
+};
+
+static const struct v4l2_ioctl_ops tea5764_ioctl_ops = {
+        .vidioc_querycap    = vidioc_querycap,
+        .vidioc_g_tuner     = vidioc_g_tuner,
+        .vidioc_s_tuner     = vidioc_s_tuner,
+        .vidioc_g_audio     = vidioc_g_audio,
+        .vidioc_s_audio     = vidioc_s_audio,
+        .vidioc_g_input     = vidioc_g_input,
+        .vidioc_s_input     = vidioc_s_input,
+        .vidioc_g_frequency = vidioc_g_frequency,
+        .vidioc_s_frequency = vidioc_s_frequency,
+        .vidioc_queryctrl   = vidioc_queryctrl,
+        .vidioc_g_ctrl      = vidioc_g_ctrl,
+        .vidioc_s_ctrl      = vidioc_s_ctrl,
+};
+
+/* V4L2 interface */
+static struct video_device tea5764_radio_template = {
+        .name           = "TEA5764 FM-Radio",
+        .fops           = &tea5764_fops,
+        .ioctl_ops      = &tea5764_ioctl_ops,
+        .release        = video_device_release,
+};
+
+/* I2C probe: check if the device exists and register with v4l if it is */
+static int __devinit tea5764_i2c_probe(struct i2c_client *client,
+                                        const struct i2c_device_id *id)
+{
+        struct tea5764_device *radio;
+        struct tea5764_regs *r;
+        int ret;
+
+        PDEBUG("probe");
+        radio = kmalloc(sizeof(struct tea5764_device), GFP_KERNEL);
+        if (!radio)
+                return -ENOMEM;
+
+        mutex_init(&radio->mutex);
+        radio->i2c_client = client;
+        ret = tea5764_i2c_read(radio);
+        if (ret)
+                goto errfr;
+        r = &radio->regs;
+        PDEBUG("chipid = %04X, manid = %04X", r->chipid, r->manid);
+        if (r->chipid != TEA5764_CHIPID ||
+                (r->manid & 0x0fff) != TEA5764_MANID) {
+                PWARN("This chip is not a TEA5764!");
+                ret = -EINVAL;
+                goto errfr;
+        }
+
+        radio->videodev = video_device_alloc();
+        if (!(radio->videodev)) {
+                ret = -ENOMEM;
+                goto errfr;
+        }
+        memcpy(radio->videodev, &tea5764_radio_template,
+                sizeof(tea5764_radio_template));
+
+        i2c_set_clientdata(client, radio);
+        video_set_drvdata(radio->videodev, radio);
+
+        ret = video_register_device(radio->videodev, VFL_TYPE_RADIO, radio_nr);
+        if (ret < 0) {
+                PWARN("Could not register video device!");
+                goto errrel;
+        }
+
+        /* initialize and power off the chip */
+        tea5764_i2c_read(radio);
+        tea5764_set_audout_mode(radio, V4L2_TUNER_MODE_STEREO);
+        tea5764_mute(radio, 1);
+        tea5764_power_down(radio);
+
+        PINFO("registered.");
+        return 0;
+errrel:
+        video_device_release(radio->videodev);
+errfr:
+        kfree(radio);
+        return ret;
+}
+
+static int __devexit tea5764_i2c_remove(struct i2c_client *client)
+{
+        struct tea5764_device *radio = i2c_get_clientdata(client);
+
+        PDEBUG("remove");
+        if (radio) {
+                tea5764_power_down(radio);
+                video_unregister_device(radio->videodev);
+                kfree(radio);
+        }
+        return 0;
+}
+
+/* I2C subsystem interface */
+static const struct i2c_device_id tea5764_id[] = {
+        { "radio-tea5764", 0 },
+        { }                                     /* Terminating entry */
+};
+MODULE_DEVICE_TABLE(i2c, tea5764_id);
+
+static struct i2c_driver tea5764_i2c_driver = {
+        .driver = {
+                .name = "radio-tea5764",
+                .owner = THIS_MODULE,
+        },
+        .probe = tea5764_i2c_probe,
+        .remove = __devexit_p(tea5764_i2c_remove),
+        .id_table = tea5764_id,
+};
+
+/* init the driver */
+static int __init tea5764_init(void)
+{
+        int ret = i2c_add_driver(&tea5764_i2c_driver);
+
+        printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ": "
+                DRIVER_DESC "\n");
+        return ret;
+}
+
+/* cleanup the driver */
+static void __exit tea5764_exit(void)
+{
+        i2c_del_driver(&tea5764_i2c_driver);
+}
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+
+module_param(use_xtal, int, 1);
+MODULE_PARM_DESC(use_xtal, "Chip have a xtal connected in board");
+module_param(radio_nr, int, 0);
+MODULE_PARM_DESC(radio_nr, "video4linux device number to use");
+
+module_init(tea5764_init);
+module_exit(tea5764_exit);