--- /dev/null
+/*
+ * drivers/media/radio/radio-tea5761.c
+ *
+ * Copyright (C) 2005 Nokia 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/init.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <media/v4l2-common.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/board.h>
+
+#define DRIVER_NAME "tea5761"
+
+#define TEA5761_VERSION KERNEL_VERSION(0, 0, 1)
+
+#define TEA5761_I2C_ADDR 0x10
+
+#define TEA5761_MANID 0x002b
+#define TEA5761_CHIPID 0x5761
+
+#define TEA5761_INTREG_BLMSK 0x0001
+#define TEA5761_INTREG_FRRMSK 0x0002
+#define TEA5761_INTREG_LEVMSK 0x0008
+#define TEA5761_INTREG_IFMSK 0x0010
+#define TEA5761_INTREG_BLMFLAG 0x0100
+#define TEA5761_INTREG_FRRFLAG 0x0200
+#define TEA5761_INTREG_LEVFLAG 0x0800
+#define TEA5761_INTREG_IFFLAG 0x1000
+
+#define TEA5761_FRQSET_SUD 0x8000
+#define TEA5761_FRQSET_SM 0x4000
+
+#define TEA5761_TNCTRL_PUPD0 0x4000
+#define TEA5761_TNCTRL_BLIM 0x2000
+#define TEA5761_TNCTRL_SWPM 0x1000
+#define TEA5761_TNCTRL_IFCTC 0x0800
+#define TEA5761_TNCTRL_AFM 0x0400
+#define TEA5761_TNCTRL_SMUTE 0x0200
+#define TEA5761_TNCTRL_SNC 0x0100
+#define TEA5761_TNCTRL_MU 0x0080
+#define TEA5761_TNCTRL_SSL1 0x0040
+#define TEA5761_TNCTRL_SSL0 0x0020
+#define TEA5761_TNCTRL_HLSI 0x0010
+#define TEA5761_TNCTRL_MST 0x0008
+#define TEA5761_TNCTRL_SWP 0x0004
+#define TEA5761_TNCTRL_DTC 0x0002
+#define TEA5761_TNCTRL_AHLSI 0x0001
+
+#define TEA5761_TUNCHK_LEVEL(x) (((x) & 0x00F0) >> 4)
+#define TEA5761_TUNCHK_IFCNT(x) (((x) & 0xFE00) >> 9)
+#define TEA5761_TUNCHK_TUNTO 0x0100
+#define TEA5761_TUNCHK_LD 0x0008
+#define TEA5761_TUNCHK_STEREO 0x0004
+
+#define TEA5761_TESTREG_TRIGFR 0x0800
+
+#define TEA5761_FREQ_LOW 87500
+#define TEA5761_FREQ_HIGH 108000
+
+/* Probe for TEA5761 twice since the version N4B seems to be
+ * broken and needs two probes to be found */
+static unsigned short normal_i2c[] = {
+ TEA5761_I2C_ADDR, TEA5761_I2C_ADDR, I2C_CLIENT_END
+};
+
+I2C_CLIENT_INSMOD;
+
+struct tea5761_regs {
+ u16 intreg;
+ u16 frqset;
+ u16 tnctrl;
+ u16 frqchk;
+ u16 tunchk;
+ u16 testreg;
+ u16 manid;
+ u16 chipid;
+} __attribute__ ((packed));
+
+struct tea5761_write_regs {
+ u8 intreg;
+ u16 frqset;
+ u16 tnctrl;
+ u16 testreg;
+} __attribute__ ((packed));
+
+struct tea5761_device {
+ struct video_device *video_dev;
+ struct i2c_client *i2c_dev;
+ struct tea5761_regs regs;
+ struct mutex mutex;
+ int users;
+};
+
+static struct tea5761_device tea5761;
+
+static struct i2c_driver tea5761_driver;
+static int radio_nr = -1;
+
+static int tea5761_read_regs(struct tea5761_device *tea)
+{
+ int rc, i;
+ u16 *p = (u16 *) &tea->regs;
+ struct i2c_client *client = tea->i2c_dev;
+
+ rc = i2c_master_recv(client, (void*) &tea->regs, sizeof(tea->regs));
+ for (i = 0; i < 8; i++) {
+ p[i] = __be16_to_cpu(p[i]);
+ }
+
+ dev_dbg(&client->dev,
+ "chip state: %04x %04x %04x %04x %04x %04x %04x %04x\n",
+ p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]);
+
+ if (rc < 0)
+ dev_err(&client->dev, "read\n");
+
+ return rc;
+}
+
+static void tea5761_write_regs(struct tea5761_device *tea)
+{
+ struct tea5761_write_regs wr;
+ struct tea5761_regs *r = &tea->regs;
+ struct i2c_client *client = tea->i2c_dev;
+#ifdef DEBUG
+ u8 *p = (u8 *) r;
+#endif
+
+ 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);
+
+ dev_dbg(&client->dev,
+ "writing state: %02x %02x %02x %02x %02x %02x %02x\n",
+ p[0], p[1], p[2], p[3], p[4], p[5], p[6]);
+ if (i2c_master_send(client, (void *) &wr, sizeof(wr)) < 0)
+ dev_err(&client->dev, "write\n");
+}
+
+static void tea5761_power_up(struct tea5761_device *tea)
+{
+ struct tea5761_regs *r = &tea->regs;
+
+ if (!(r->tnctrl & TEA5761_TNCTRL_PUPD0)) {
+ r->tnctrl &= ~(TEA5761_TNCTRL_AFM | TEA5761_TNCTRL_MU |
+ TEA5761_TNCTRL_HLSI);
+ r->testreg |= TEA5761_TESTREG_TRIGFR;
+ r->tnctrl |= TEA5761_TNCTRL_PUPD0;
+ return tea5761_write_regs(tea);
+ }
+}
+
+static void tea5761_power_down(struct tea5761_device *tea)
+{
+ struct tea5761_regs *r = &tea->regs;
+
+ if (r->tnctrl & TEA5761_TNCTRL_PUPD0) {
+ r->tnctrl &= ~TEA5761_TNCTRL_PUPD0;
+ return tea5761_write_regs(tea);
+ }
+}
+
+static void tea5761_set_freq(struct tea5761_device *tea, int freq)
+{
+ struct tea5761_regs *r = &tea->regs;
+
+ if (r->tnctrl & TEA5761_TNCTRL_HLSI)
+ r->frqset = (freq + 225000) / 8192;
+ else
+ r->frqset = (freq - 225000) / 8192;
+}
+
+static int tea5761_get_freq(struct tea5761_device *tea)
+{
+ struct tea5761_regs *r = &tea->regs;
+
+ if (r->tnctrl & TEA5761_TNCTRL_HLSI)
+ return (r->frqchk * 8192) - 225000;
+ else
+ return (r->frqchk * 8192) + 225000;
+}
+
+static void tea5761_tune(struct tea5761_device *tea, int freq)
+{
+ tea5761_set_freq(tea, freq);
+ tea5761_write_regs(tea);
+}
+
+static void tea5761_set_audout_mode(struct tea5761_device *tea, int audmode)
+{
+ struct tea5761_regs *r = &tea->regs;
+ int tnctrl = r->tnctrl;
+
+ if (audmode == V4L2_TUNER_MODE_MONO)
+ r->tnctrl |= TEA5761_TNCTRL_MST;
+ else
+ r->tnctrl &= ~TEA5761_TNCTRL_MST;
+ if (tnctrl != r->tnctrl)
+ tea5761_write_regs(tea);
+}
+
+static int tea5761_get_audout_mode(struct tea5761_device *tea)
+{
+ struct tea5761_regs *r = &tea->regs;
+
+ if (r->tnctrl & TEA5761_TNCTRL_MST)
+ return V4L2_TUNER_MODE_MONO;
+ else
+ return V4L2_TUNER_MODE_STEREO;
+}
+
+static void tea5761_mute(struct tea5761_device *tea, int on)
+{
+ struct tea5761_regs *r = &tea->regs;
+ int tnctrl = r->tnctrl;
+
+ if (on)
+ r->tnctrl |= TEA5761_TNCTRL_MU;
+ else
+ r->tnctrl &= ~TEA5761_TNCTRL_MU;
+ if (tnctrl != r->tnctrl)
+ tea5761_write_regs(tea);
+}
+
+static int tea5761_is_muted(struct tea5761_device *tea)
+{
+ return tea->regs.tnctrl & TEA5761_TNCTRL_MU;
+}
+
+static int tea5761_do_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, void *arg)
+{
+ struct tea5761_device *tea = file->private_data;
+ struct video_device *dev = tea->video_dev;
+ struct i2c_client *client = tea->i2c_dev;
+ struct tea5761_regs *r = &tea->regs;
+
+ union {
+ struct v4l2_capability c;
+ struct v4l2_tuner t;
+ struct v4l2_frequency f;
+ struct v4l2_queryctrl qc;
+ struct v4l2_control ct;
+ } *u = arg;
+
+ tea5761_read_regs(tea);
+
+ switch (cmd) {
+ case VIDIOC_QUERYCAP:
+ dev_dbg(&client->dev, "VIDIOC_QUERYCAP\n");
+ memset(&u->c, 0, sizeof(u->c));
+ strlcpy(u->c.driver, dev->dev->driver->name,
+ sizeof(u->c.driver));
+ strlcpy(u->c.card, dev->name, sizeof(u->c.card));
+ snprintf(u->c.bus_info, sizeof(u->c.bus_info), "I2C:%s",
+ dev->dev->bus_id);
+ u->c.version = TEA5761_VERSION;
+ u->c.capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
+ break;
+
+ case VIDIOC_G_TUNER:
+ /* Only one tuner chip */
+ dev_dbg(&client->dev, "VIDIOC_G_TUNER\n");
+ if (u->t.index != 0)
+ return -EINVAL;
+
+ memset(&u->t, 0, sizeof(u->t));
+ u->t.type = V4L2_TUNER_RADIO;
+ strlcpy(u->t.name, "FM", sizeof(u->t.name));
+ /* Freq in 62.5Hz units */
+ u->t.rangelow = TEA5761_FREQ_LOW * 16;
+ u->t.rangehigh = TEA5761_FREQ_HIGH * 16;
+ u->t.capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
+ if (r->tunchk & TEA5761_TUNCHK_STEREO)
+ u->t.rxsubchans = V4L2_TUNER_SUB_STEREO;
+ u->t.audmode = tea5761_get_audout_mode(tea);
+ u->t.signal = TEA5761_TUNCHK_LEVEL(r->tunchk) * 0xffff / 0xf;
+ u->t.afc = TEA5761_TUNCHK_IFCNT(r->tunchk);
+ break;
+
+ case VIDIOC_S_TUNER:
+ /* Only tuner nro 0 can be selected. */
+ dev_dbg(&client->dev, "VIDIOC_S_TUNER\n");
+ if (u->t.index != 0)
+ return -EINVAL;
+ tea5761_set_audout_mode(tea, u->t.audmode);
+ break;
+
+ case VIDIOC_G_FREQUENCY:
+ dev_dbg(&client->dev, "VIDIOC_G_FREQUENCY\n");
+ memset(&u->f, 0, sizeof(u->f));
+ u->f.type = V4L2_TUNER_RADIO;
+ if (r->tnctrl & TEA5761_TNCTRL_PUPD0)
+ u->f.frequency = (tea5761_get_freq(tea) * 2) / 125;
+ else
+ u->f.frequency = 0;
+ break;
+
+ case VIDIOC_S_FREQUENCY:
+ dev_dbg(&client->dev, "VIDIOC_S_FREQUENCY %u\n",
+ u->f.frequency);
+ if (u->f.tuner != 0)
+ return -EINVAL;
+ if (u->f.frequency == 0) {
+ /* We special case this as a power down
+ * control. */
+ tea5761_power_down(tea);
+ break;
+ }
+ if (u->f.frequency < 16 * TEA5761_FREQ_LOW)
+ return -EINVAL;
+ if (u->f.frequency > 16 * TEA5761_FREQ_HIGH)
+ return -EINVAL;
+
+ tea5761_power_up(tea);
+ tea5761_tune(tea, (u->f.frequency * 125) / 2);
+ break;
+
+ case VIDIOC_QUERYCTRL:
+ dev_dbg(&client->dev, "VIDIOC_QUERYCTRL %d\n", u->qc.id);
+ if (u->qc.id != V4L2_CID_AUDIO_MUTE)
+ return -EINVAL;
+ strlcpy(u->qc.name, "Mute", sizeof(u->qc.name));
+ u->qc.minimum = 0;
+ u->qc.maximum = 1;
+ u->qc.step = 1;
+ u->qc.default_value = 0;
+ u->qc.type = V4L2_CTRL_TYPE_BOOLEAN;
+ break;
+
+ case VIDIOC_G_CTRL:
+ dev_dbg(&client->dev, "VIDIOC_G_CTRL %d\n", u->ct.id);
+ if (u->ct.id != V4L2_CID_AUDIO_MUTE)
+ return -EINVAL;
+ if (r->tnctrl & TEA5761_TNCTRL_PUPD0)
+ u->ct.value = tea5761_is_muted(tea) ? 1 : 0;
+ else
+ u->ct.value = 0;
+ break;
+
+ case VIDIOC_S_CTRL:
+ dev_dbg(&client->dev, "VIDIOC_S_CTRL %d\n", u->ct.id);
+ if (u->ct.id != V4L2_CID_AUDIO_MUTE)
+ return -EINVAL;
+ tea5761_mute(tea, u->ct.value);
+ break;
+
+ default:
+ return -ENOIOCTLCMD;
+ }
+
+ return 0;
+}
+
+static int tea5761_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ return video_usercopy(inode, file, cmd, arg, tea5761_do_ioctl);
+}
+
+static int tea5761_open(struct inode *inode, struct file *file)
+{
+ int minor = iminor(file->f_dentry->d_inode);
+ /* Currently we support only one device */
+ struct tea5761_device *tea = &tea5761;
+
+ if (tea->video_dev->minor != minor)
+ return -ENODEV;
+
+ mutex_lock(&tea->mutex);
+ /* Only exclusive access */
+ if (tea->users) {
+ mutex_unlock(&tea->mutex);
+ return -EBUSY;
+ }
+ tea->users++;
+ mutex_unlock(&tea->mutex);
+
+ file->private_data = tea;
+ return 0;
+}
+
+static int tea5761_release(struct inode *inode, struct file *file)
+{
+ struct tea5761_device *tea = file->private_data;
+
+ mutex_lock(&tea->mutex);
+ tea->users--;
+ mutex_unlock(&tea->mutex);
+
+ return 0;
+}
+
+static struct file_operations tea5761_fops = {
+ .owner = THIS_MODULE,
+ .open = tea5761_open,
+ .release = tea5761_release,
+ .ioctl = tea5761_ioctl,
+ .llseek = no_llseek,
+};
+
+static struct video_device tea5761_video_device = {
+ .owner = THIS_MODULE,
+ .name = "TEA5761 FM-Radio",
+ .type = VID_TYPE_TUNER,
+ .hardware = 40 /* VID_HARDWARE_TEA5761UK */,
+ .fops = &tea5761_fops,
+ .release = video_device_release
+};
+
+static int tea5761_probe(struct i2c_adapter *adapter, int address,
+ int kind)
+{
+ struct i2c_client *client;
+ struct video_device *video_dev;
+ int err = 0;
+ static const char *client_name = "TEA5761 FM-Radio";
+ struct tea5761_device *tea = &tea5761;
+ struct tea5761_regs *r = &tea->regs;
+
+ mutex_init(&tea->mutex);
+ /* I2C detection and initialization */
+ client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
+ if (client == NULL) {
+ dev_err(&adapter->dev, DRIVER_NAME
+ ": couldn't allocate memory\n");
+ return -ENOMEM;
+ }
+ tea->i2c_dev = client;
+
+ client->addr = address;
+ client->adapter = adapter;
+ client->driver = &tea5761_driver;
+ client->dev.driver = &tea5761_driver.driver;
+ client->flags = 0;
+ strlcpy(client->name, client_name, I2C_NAME_SIZE);
+
+ if (kind < 0) {
+ if (tea5761_read_regs(tea) < 0) {
+ dev_info(&client->dev,
+ "chip read failed for %d-%04x\n",
+ adapter->nr, address);
+ goto err_tea_dev;
+ }
+ if (r->chipid != TEA5761_CHIPID) {
+ dev_info(&client->dev,
+ "bad chipid (0x%04x) at %d-%04x\n",
+ r->chipid, adapter->nr, address);
+ goto err_tea_dev;
+ }
+ if ((r->manid & 0x0fff) != TEA5761_MANID) {
+ dev_info(&client->dev,
+ "bad manid (0x%04x) at %d-%04x\n",
+ r->manid, adapter->nr, address);
+ goto err_tea_dev;
+ }
+ }
+
+ err = i2c_attach_client(client);
+ if (err) {
+ dev_err(&client->dev, "couldn't attach to address %d-%04x\n",
+ adapter->nr, address);
+ goto err_tea_dev;
+ }
+
+ /* V4L initialization */
+ video_dev = video_device_alloc();
+ if (video_dev == NULL) {
+ dev_err(&client->dev, "couldn't allocate memory\n");
+ err = -ENOMEM;
+ goto err_i2c_attach;
+ }
+ tea->video_dev = video_dev;
+
+ *video_dev = tea5761_video_device;
+ video_dev->dev = &client->dev;
+ i2c_set_clientdata(client, video_dev);
+
+ /* initialize and power off the chip */
+ tea5761_read_regs(tea);
+ tea5761_set_audout_mode(tea, V4L2_TUNER_MODE_STEREO);
+ tea5761_mute(tea, 0);
+ tea5761_power_down(tea);
+
+ tea5761.video_dev = video_dev;
+ tea5761.i2c_dev = client;
+
+ err = video_register_device(video_dev, VFL_TYPE_RADIO, radio_nr);
+ if (err) {
+ dev_err(&client->dev, "couldn't register video device\n");
+ goto err_video_alloc;
+ }
+
+ dev_info(&client->dev, "tea5761 (version %d) detected at %d-%04x\n",
+ (tea->regs.manid >> 12) & 0xf, adapter->nr, address);
+
+ return 0;
+
+err_video_alloc:
+ video_device_release(video_dev);
+err_i2c_attach:
+ i2c_detach_client(client);
+err_tea_dev:
+ kfree(client);
+ return err;
+}
+
+static int tea5761_attach_adapter(struct i2c_adapter *adapter)
+{
+ if (!i2c_check_functionality(adapter, I2C_FUNC_I2C))
+ return -EINVAL;
+
+ return i2c_probe(adapter, &addr_data, tea5761_probe);
+}
+
+static int tea5761_detach_client(struct i2c_client *client)
+{
+ struct video_device *vd = i2c_get_clientdata(client);
+
+ i2c_detach_client(client);
+ video_unregister_device(vd);
+ kfree(client);
+
+ return 0;
+}
+
+static struct i2c_driver tea5761_driver = {
+ .id = I2C_DRIVERID_TUNER,
+ .driver = {
+ .name = DRIVER_NAME,
+ },
+ .attach_adapter = tea5761_attach_adapter,
+ .detach_client = tea5761_detach_client,
+};
+
+#if CONFIG_ARCH_OMAP
+/* No way to pass platform device data. Enable here all the TEA5761
+ * devices, since I2C address scanning will need them to respond.
+ */
+static int enable_gpio;
+
+static int __init tea5761_dev_init(void)
+{
+ const struct omap_tea5761_config *info;
+
+ info = omap_get_config(OMAP_TAG_TEA5761, struct omap_tea5761_config);
+ if (info) {
+ enable_gpio = info->enable_gpio;
+ }
+
+ if (enable_gpio) {
+ pr_debug(DRIVER_NAME ": enabling tea5761 at GPIO %d\n",
+ enable_gpio);
+
+ if (omap_request_gpio(enable_gpio) < 0) {
+ printk(KERN_ERR DRIVER_NAME ": can't request GPIO %d\n",
+ enable_gpio);
+ return -ENODEV;
+ }
+
+ omap_set_gpio_direction(enable_gpio, 0);
+ udelay(50);
+ omap_set_gpio_dataout(enable_gpio, 1);
+ }
+
+ return 0;
+}
+
+static void __exit tea5761_dev_exit(void)
+{
+ if (enable_gpio) {
+ omap_set_gpio_dataout(enable_gpio, 0);
+ omap_free_gpio(enable_gpio);
+ }
+}
+#else
+static int __init tea5761_dev_init(void)
+{
+}
+
+static void __exit tea5761_dev_exit(void)
+{
+}
+#endif
+
+static int __init tea5761_init(void)
+{
+ int res;
+
+ if ((res = tea5761_dev_init()) < 0)
+ return res;
+
+ if ((res = i2c_add_driver(&tea5761_driver))) {
+ printk(KERN_ERR DRIVER_NAME ": driver registration failed\n");
+ return res;
+ }
+
+ return 0;
+}
+
+static void __exit tea5761_exit(void)
+{
+ int res;
+
+ if ((res = i2c_del_driver(&tea5761_driver)))
+ printk(KERN_ERR DRIVER_NAME ": i2c driver removal failed\n");
+ tea5761_dev_exit();
+}
+
+MODULE_AUTHOR("Timo Teräs");
+MODULE_DESCRIPTION("I2C interface for TEA5761.");
+MODULE_LICENSE("GPL");
+
+module_param(radio_nr, int, 0);
+MODULE_PARM_DESC(nr_radio, "video4linux device number to use");
+
+module_init(tea5761_init)
+module_exit(tea5761_exit)
projects / linux-2.6-omap-h63xx.git / commitdiff