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path: root/drivers/media/v4l2-core/tuner-core.c
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Diffstat (limited to 'drivers/media/v4l2-core/tuner-core.c')
-rw-r--r--drivers/media/v4l2-core/tuner-core.c1354
1 files changed, 1354 insertions, 0 deletions
diff --git a/drivers/media/v4l2-core/tuner-core.c b/drivers/media/v4l2-core/tuner-core.c
new file mode 100644
index 000000000000..b5a819af2b8c
--- /dev/null
+++ b/drivers/media/v4l2-core/tuner-core.c
@@ -0,0 +1,1354 @@
+/*
+ * i2c tv tuner chip device driver
+ * core core, i.e. kernel interfaces, registering and so on
+ *
+ * Copyright(c) by Ralph Metzler, Gerd Knorr, Gunther Mayer
+ *
+ * Copyright(c) 2005-2011 by Mauro Carvalho Chehab
+ * - Added support for a separate Radio tuner
+ * - Major rework and cleanups at the code
+ *
+ * This driver supports many devices and the idea is to let the driver
+ * detect which device is present. So rather than listing all supported
+ * devices here, we pretend to support a single, fake device type that will
+ * handle both radio and analog TV tuning.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/poll.h>
+#include <linux/i2c.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/videodev2.h>
+#include <media/tuner.h>
+#include <media/tuner-types.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
+#include "mt20xx.h"
+#include "tda8290.h"
+#include "tea5761.h"
+#include "tea5767.h"
+#include "tuner-xc2028.h"
+#include "tuner-simple.h"
+#include "tda9887.h"
+#include "xc5000.h"
+#include "tda18271.h"
+#include "xc4000.h"
+
+#define UNSET (-1U)
+
+#define PREFIX (t->i2c->driver->driver.name)
+
+/*
+ * Driver modprobe parameters
+ */
+
+/* insmod options used at init time => read/only */
+static unsigned int addr;
+static unsigned int no_autodetect;
+static unsigned int show_i2c;
+
+module_param(addr, int, 0444);
+module_param(no_autodetect, int, 0444);
+module_param(show_i2c, int, 0444);
+
+/* insmod options used at runtime => read/write */
+static int tuner_debug;
+static unsigned int tv_range[2] = { 44, 958 };
+static unsigned int radio_range[2] = { 65, 108 };
+static char pal[] = "--";
+static char secam[] = "--";
+static char ntsc[] = "-";
+
+module_param_named(debug, tuner_debug, int, 0644);
+module_param_array(tv_range, int, NULL, 0644);
+module_param_array(radio_range, int, NULL, 0644);
+module_param_string(pal, pal, sizeof(pal), 0644);
+module_param_string(secam, secam, sizeof(secam), 0644);
+module_param_string(ntsc, ntsc, sizeof(ntsc), 0644);
+
+/*
+ * Static vars
+ */
+
+static LIST_HEAD(tuner_list);
+static const struct v4l2_subdev_ops tuner_ops;
+
+/*
+ * Debug macros
+ */
+
+#define tuner_warn(fmt, arg...) do { \
+ printk(KERN_WARNING "%s %d-%04x: " fmt, PREFIX, \
+ i2c_adapter_id(t->i2c->adapter), \
+ t->i2c->addr, ##arg); \
+ } while (0)
+
+#define tuner_info(fmt, arg...) do { \
+ printk(KERN_INFO "%s %d-%04x: " fmt, PREFIX, \
+ i2c_adapter_id(t->i2c->adapter), \
+ t->i2c->addr, ##arg); \
+ } while (0)
+
+#define tuner_err(fmt, arg...) do { \
+ printk(KERN_ERR "%s %d-%04x: " fmt, PREFIX, \
+ i2c_adapter_id(t->i2c->adapter), \
+ t->i2c->addr, ##arg); \
+ } while (0)
+
+#define tuner_dbg(fmt, arg...) do { \
+ if (tuner_debug) \
+ printk(KERN_DEBUG "%s %d-%04x: " fmt, PREFIX, \
+ i2c_adapter_id(t->i2c->adapter), \
+ t->i2c->addr, ##arg); \
+ } while (0)
+
+/*
+ * Internal struct used inside the driver
+ */
+
+struct tuner {
+ /* device */
+ struct dvb_frontend fe;
+ struct i2c_client *i2c;
+ struct v4l2_subdev sd;
+ struct list_head list;
+
+ /* keep track of the current settings */
+ v4l2_std_id std;
+ unsigned int tv_freq;
+ unsigned int radio_freq;
+ unsigned int audmode;
+
+ enum v4l2_tuner_type mode;
+ unsigned int mode_mask; /* Combination of allowable modes */
+
+ bool standby; /* Standby mode */
+
+ unsigned int type; /* chip type id */
+ unsigned int config;
+ const char *name;
+};
+
+/*
+ * Function prototypes
+ */
+
+static void set_tv_freq(struct i2c_client *c, unsigned int freq);
+static void set_radio_freq(struct i2c_client *c, unsigned int freq);
+
+/*
+ * tuner attach/detach logic
+ */
+
+/* This macro allows us to probe dynamically, avoiding static links */
+#ifdef CONFIG_MEDIA_ATTACH
+#define tuner_symbol_probe(FUNCTION, ARGS...) ({ \
+ int __r = -EINVAL; \
+ typeof(&FUNCTION) __a = symbol_request(FUNCTION); \
+ if (__a) { \
+ __r = (int) __a(ARGS); \
+ symbol_put(FUNCTION); \
+ } else { \
+ printk(KERN_ERR "TUNER: Unable to find " \
+ "symbol "#FUNCTION"()\n"); \
+ } \
+ __r; \
+})
+
+static void tuner_detach(struct dvb_frontend *fe)
+{
+ if (fe->ops.tuner_ops.release) {
+ fe->ops.tuner_ops.release(fe);
+ symbol_put_addr(fe->ops.tuner_ops.release);
+ }
+ if (fe->ops.analog_ops.release) {
+ fe->ops.analog_ops.release(fe);
+ symbol_put_addr(fe->ops.analog_ops.release);
+ }
+}
+#else
+#define tuner_symbol_probe(FUNCTION, ARGS...) ({ \
+ FUNCTION(ARGS); \
+})
+
+static void tuner_detach(struct dvb_frontend *fe)
+{
+ if (fe->ops.tuner_ops.release)
+ fe->ops.tuner_ops.release(fe);
+ if (fe->ops.analog_ops.release)
+ fe->ops.analog_ops.release(fe);
+}
+#endif
+
+
+static inline struct tuner *to_tuner(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct tuner, sd);
+}
+
+/*
+ * struct analog_demod_ops callbacks
+ */
+
+static void fe_set_params(struct dvb_frontend *fe,
+ struct analog_parameters *params)
+{
+ struct dvb_tuner_ops *fe_tuner_ops = &fe->ops.tuner_ops;
+ struct tuner *t = fe->analog_demod_priv;
+
+ if (NULL == fe_tuner_ops->set_analog_params) {
+ tuner_warn("Tuner frontend module has no way to set freq\n");
+ return;
+ }
+ fe_tuner_ops->set_analog_params(fe, params);
+}
+
+static void fe_standby(struct dvb_frontend *fe)
+{
+ struct dvb_tuner_ops *fe_tuner_ops = &fe->ops.tuner_ops;
+
+ if (fe_tuner_ops->sleep)
+ fe_tuner_ops->sleep(fe);
+}
+
+static int fe_has_signal(struct dvb_frontend *fe)
+{
+ u16 strength = 0;
+
+ if (fe->ops.tuner_ops.get_rf_strength)
+ fe->ops.tuner_ops.get_rf_strength(fe, &strength);
+
+ return strength;
+}
+
+static int fe_get_afc(struct dvb_frontend *fe)
+{
+ s32 afc = 0;
+
+ if (fe->ops.tuner_ops.get_afc)
+ fe->ops.tuner_ops.get_afc(fe, &afc);
+
+ return 0;
+}
+
+static int fe_set_config(struct dvb_frontend *fe, void *priv_cfg)
+{
+ struct dvb_tuner_ops *fe_tuner_ops = &fe->ops.tuner_ops;
+ struct tuner *t = fe->analog_demod_priv;
+
+ if (fe_tuner_ops->set_config)
+ return fe_tuner_ops->set_config(fe, priv_cfg);
+
+ tuner_warn("Tuner frontend module has no way to set config\n");
+
+ return 0;
+}
+
+static void tuner_status(struct dvb_frontend *fe);
+
+static struct analog_demod_ops tuner_analog_ops = {
+ .set_params = fe_set_params,
+ .standby = fe_standby,
+ .has_signal = fe_has_signal,
+ .get_afc = fe_get_afc,
+ .set_config = fe_set_config,
+ .tuner_status = tuner_status
+};
+
+/*
+ * Functions to select between radio and TV and tuner probe/remove functions
+ */
+
+/**
+ * set_type - Sets the tuner type for a given device
+ *
+ * @c: i2c_client descriptoy
+ * @type: type of the tuner (e. g. tuner number)
+ * @new_mode_mask: Indicates if tuner supports TV and/or Radio
+ * @new_config: an optional parameter ranging from 0-255 used by
+ a few tuners to adjust an internal parameter,
+ like LNA mode
+ * @tuner_callback: an optional function to be called when switching
+ * to analog mode
+ *
+ * This function applys the tuner config to tuner specified
+ * by tun_setup structure. It contains several per-tuner initialization "magic"
+ */
+static void set_type(struct i2c_client *c, unsigned int type,
+ unsigned int new_mode_mask, unsigned int new_config,
+ int (*tuner_callback) (void *dev, int component, int cmd, int arg))
+{
+ struct tuner *t = to_tuner(i2c_get_clientdata(c));
+ struct dvb_tuner_ops *fe_tuner_ops = &t->fe.ops.tuner_ops;
+ struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
+ unsigned char buffer[4];
+ int tune_now = 1;
+
+ if (type == UNSET || type == TUNER_ABSENT) {
+ tuner_dbg("tuner 0x%02x: Tuner type absent\n", c->addr);
+ return;
+ }
+
+ t->type = type;
+ /* prevent invalid config values */
+ t->config = new_config < 256 ? new_config : 0;
+ if (tuner_callback != NULL) {
+ tuner_dbg("defining GPIO callback\n");
+ t->fe.callback = tuner_callback;
+ }
+
+ /* discard private data, in case set_type() was previously called */
+ tuner_detach(&t->fe);
+ t->fe.analog_demod_priv = NULL;
+
+ switch (t->type) {
+ case TUNER_MT2032:
+ if (!dvb_attach(microtune_attach,
+ &t->fe, t->i2c->adapter, t->i2c->addr))
+ goto attach_failed;
+ break;
+ case TUNER_PHILIPS_TDA8290:
+ {
+ struct tda829x_config cfg = {
+ .lna_cfg = t->config,
+ };
+ if (!dvb_attach(tda829x_attach, &t->fe, t->i2c->adapter,
+ t->i2c->addr, &cfg))
+ goto attach_failed;
+ break;
+ }
+ case TUNER_TEA5767:
+ if (!dvb_attach(tea5767_attach, &t->fe,
+ t->i2c->adapter, t->i2c->addr))
+ goto attach_failed;
+ t->mode_mask = T_RADIO;
+ break;
+ case TUNER_TEA5761:
+ if (!dvb_attach(tea5761_attach, &t->fe,
+ t->i2c->adapter, t->i2c->addr))
+ goto attach_failed;
+ t->mode_mask = T_RADIO;
+ break;
+ case TUNER_PHILIPS_FMD1216ME_MK3:
+ case TUNER_PHILIPS_FMD1216MEX_MK3:
+ buffer[0] = 0x0b;
+ buffer[1] = 0xdc;
+ buffer[2] = 0x9c;
+ buffer[3] = 0x60;
+ i2c_master_send(c, buffer, 4);
+ mdelay(1);
+ buffer[2] = 0x86;
+ buffer[3] = 0x54;
+ i2c_master_send(c, buffer, 4);
+ if (!dvb_attach(simple_tuner_attach, &t->fe,
+ t->i2c->adapter, t->i2c->addr, t->type))
+ goto attach_failed;
+ break;
+ case TUNER_PHILIPS_TD1316:
+ buffer[0] = 0x0b;
+ buffer[1] = 0xdc;
+ buffer[2] = 0x86;
+ buffer[3] = 0xa4;
+ i2c_master_send(c, buffer, 4);
+ if (!dvb_attach(simple_tuner_attach, &t->fe,
+ t->i2c->adapter, t->i2c->addr, t->type))
+ goto attach_failed;
+ break;
+ case TUNER_XC2028:
+ {
+ struct xc2028_config cfg = {
+ .i2c_adap = t->i2c->adapter,
+ .i2c_addr = t->i2c->addr,
+ };
+ if (!dvb_attach(xc2028_attach, &t->fe, &cfg))
+ goto attach_failed;
+ tune_now = 0;
+ break;
+ }
+ case TUNER_TDA9887:
+ if (!dvb_attach(tda9887_attach,
+ &t->fe, t->i2c->adapter, t->i2c->addr))
+ goto attach_failed;
+ break;
+ case TUNER_XC5000:
+ {
+ struct xc5000_config xc5000_cfg = {
+ .i2c_address = t->i2c->addr,
+ /* if_khz will be set at dvb_attach() */
+ .if_khz = 0,
+ };
+
+ if (!dvb_attach(xc5000_attach,
+ &t->fe, t->i2c->adapter, &xc5000_cfg))
+ goto attach_failed;
+ tune_now = 0;
+ break;
+ }
+ case TUNER_XC5000C:
+ {
+ struct xc5000_config xc5000c_cfg = {
+ .i2c_address = t->i2c->addr,
+ /* if_khz will be set at dvb_attach() */
+ .if_khz = 0,
+ .chip_id = XC5000C,
+ };
+
+ if (!dvb_attach(xc5000_attach,
+ &t->fe, t->i2c->adapter, &xc5000c_cfg))
+ goto attach_failed;
+ tune_now = 0;
+ break;
+ }
+ case TUNER_NXP_TDA18271:
+ {
+ struct tda18271_config cfg = {
+ .config = t->config,
+ .small_i2c = TDA18271_03_BYTE_CHUNK_INIT,
+ };
+
+ if (!dvb_attach(tda18271_attach, &t->fe, t->i2c->addr,
+ t->i2c->adapter, &cfg))
+ goto attach_failed;
+ tune_now = 0;
+ break;
+ }
+ case TUNER_XC4000:
+ {
+ struct xc4000_config xc4000_cfg = {
+ .i2c_address = t->i2c->addr,
+ /* FIXME: the correct parameters will be set */
+ /* only when the digital dvb_attach() occurs */
+ .default_pm = 0,
+ .dvb_amplitude = 0,
+ .set_smoothedcvbs = 0,
+ .if_khz = 0
+ };
+ if (!dvb_attach(xc4000_attach,
+ &t->fe, t->i2c->adapter, &xc4000_cfg))
+ goto attach_failed;
+ tune_now = 0;
+ break;
+ }
+ default:
+ if (!dvb_attach(simple_tuner_attach, &t->fe,
+ t->i2c->adapter, t->i2c->addr, t->type))
+ goto attach_failed;
+
+ break;
+ }
+
+ if ((NULL == analog_ops->set_params) &&
+ (fe_tuner_ops->set_analog_params)) {
+
+ t->name = fe_tuner_ops->info.name;
+
+ t->fe.analog_demod_priv = t;
+ memcpy(analog_ops, &tuner_analog_ops,
+ sizeof(struct analog_demod_ops));
+
+ } else {
+ t->name = analog_ops->info.name;
+ }
+
+ tuner_dbg("type set to %s\n", t->name);
+
+ t->mode_mask = new_mode_mask;
+
+ /* Some tuners require more initialization setup before use,
+ such as firmware download or device calibration.
+ trying to set a frequency here will just fail
+ FIXME: better to move set_freq to the tuner code. This is needed
+ on analog tuners for PLL to properly work
+ */
+ if (tune_now) {
+ if (V4L2_TUNER_RADIO == t->mode)
+ set_radio_freq(c, t->radio_freq);
+ else
+ set_tv_freq(c, t->tv_freq);
+ }
+
+ tuner_dbg("%s %s I2C addr 0x%02x with type %d used for 0x%02x\n",
+ c->adapter->name, c->driver->driver.name, c->addr << 1, type,
+ t->mode_mask);
+ return;
+
+attach_failed:
+ tuner_dbg("Tuner attach for type = %d failed.\n", t->type);
+ t->type = TUNER_ABSENT;
+
+ return;
+}
+
+/**
+ * tuner_s_type_addr - Sets the tuner type for a device
+ *
+ * @sd: subdev descriptor
+ * @tun_setup: type to be associated to a given tuner i2c address
+ *
+ * This function applys the tuner config to tuner specified
+ * by tun_setup structure.
+ * If tuner I2C address is UNSET, then it will only set the device
+ * if the tuner supports the mode specified in the call.
+ * If the address is specified, the change will be applied only if
+ * tuner I2C address matches.
+ * The call can change the tuner number and the tuner mode.
+ */
+static int tuner_s_type_addr(struct v4l2_subdev *sd,
+ struct tuner_setup *tun_setup)
+{
+ struct tuner *t = to_tuner(sd);
+ struct i2c_client *c = v4l2_get_subdevdata(sd);
+
+ tuner_dbg("Calling set_type_addr for type=%d, addr=0x%02x, mode=0x%02x, config=0x%02x\n",
+ tun_setup->type,
+ tun_setup->addr,
+ tun_setup->mode_mask,
+ tun_setup->config);
+
+ if ((t->type == UNSET && ((tun_setup->addr == ADDR_UNSET) &&
+ (t->mode_mask & tun_setup->mode_mask))) ||
+ (tun_setup->addr == c->addr)) {
+ set_type(c, tun_setup->type, tun_setup->mode_mask,
+ tun_setup->config, tun_setup->tuner_callback);
+ } else
+ tuner_dbg("set addr discarded for type %i, mask %x. "
+ "Asked to change tuner at addr 0x%02x, with mask %x\n",
+ t->type, t->mode_mask,
+ tun_setup->addr, tun_setup->mode_mask);
+
+ return 0;
+}
+
+/**
+ * tuner_s_config - Sets tuner configuration
+ *
+ * @sd: subdev descriptor
+ * @cfg: tuner configuration
+ *
+ * Calls tuner set_config() private function to set some tuner-internal
+ * parameters
+ */
+static int tuner_s_config(struct v4l2_subdev *sd,
+ const struct v4l2_priv_tun_config *cfg)
+{
+ struct tuner *t = to_tuner(sd);
+ struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
+
+ if (t->type != cfg->tuner)
+ return 0;
+
+ if (analog_ops->set_config) {
+ analog_ops->set_config(&t->fe, cfg->priv);
+ return 0;
+ }
+
+ tuner_dbg("Tuner frontend module has no way to set config\n");
+ return 0;
+}
+
+/**
+ * tuner_lookup - Seek for tuner adapters
+ *
+ * @adap: i2c_adapter struct
+ * @radio: pointer to be filled if the adapter is radio
+ * @tv: pointer to be filled if the adapter is TV
+ *
+ * Search for existing radio and/or TV tuners on the given I2C adapter,
+ * discarding demod-only adapters (tda9887).
+ *
+ * Note that when this function is called from tuner_probe you can be
+ * certain no other devices will be added/deleted at the same time, I2C
+ * core protects against that.
+ */
+static void tuner_lookup(struct i2c_adapter *adap,
+ struct tuner **radio, struct tuner **tv)
+{
+ struct tuner *pos;
+
+ *radio = NULL;
+ *tv = NULL;
+
+ list_for_each_entry(pos, &tuner_list, list) {
+ int mode_mask;
+
+ if (pos->i2c->adapter != adap ||
+ strcmp(pos->i2c->driver->driver.name, "tuner"))
+ continue;
+
+ mode_mask = pos->mode_mask;
+ if (*radio == NULL && mode_mask == T_RADIO)
+ *radio = pos;
+ /* Note: currently TDA9887 is the only demod-only
+ device. If other devices appear then we need to
+ make this test more general. */
+ else if (*tv == NULL && pos->type != TUNER_TDA9887 &&
+ (pos->mode_mask & T_ANALOG_TV))
+ *tv = pos;
+ }
+}
+
+/**
+ *tuner_probe - Probes the existing tuners on an I2C bus
+ *
+ * @client: i2c_client descriptor
+ * @id: not used
+ *
+ * This routine probes for tuners at the expected I2C addresses. On most
+ * cases, if a device answers to a given I2C address, it assumes that the
+ * device is a tuner. On a few cases, however, an additional logic is needed
+ * to double check if the device is really a tuner, or to identify the tuner
+ * type, like on tea5767/5761 devices.
+ *
+ * During client attach, set_type is called by adapter's attach_inform callback.
+ * set_type must then be completed by tuner_probe.
+ */
+static int tuner_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct tuner *t;
+ struct tuner *radio;
+ struct tuner *tv;
+
+ t = kzalloc(sizeof(struct tuner), GFP_KERNEL);
+ if (NULL == t)
+ return -ENOMEM;
+ v4l2_i2c_subdev_init(&t->sd, client, &tuner_ops);
+ t->i2c = client;
+ t->name = "(tuner unset)";
+ t->type = UNSET;
+ t->audmode = V4L2_TUNER_MODE_STEREO;
+ t->standby = 1;
+ t->radio_freq = 87.5 * 16000; /* Initial freq range */
+ t->tv_freq = 400 * 16; /* Sets freq to VHF High - needed for some PLL's to properly start */
+
+ if (show_i2c) {
+ unsigned char buffer[16];
+ int i, rc;
+
+ memset(buffer, 0, sizeof(buffer));
+ rc = i2c_master_recv(client, buffer, sizeof(buffer));
+ tuner_info("I2C RECV = ");
+ for (i = 0; i < rc; i++)
+ printk(KERN_CONT "%02x ", buffer[i]);
+ printk("\n");
+ }
+
+ /* autodetection code based on the i2c addr */
+ if (!no_autodetect) {
+ switch (client->addr) {
+ case 0x10:
+ if (tuner_symbol_probe(tea5761_autodetection,
+ t->i2c->adapter,
+ t->i2c->addr) >= 0) {
+ t->type = TUNER_TEA5761;
+ t->mode_mask = T_RADIO;
+ tuner_lookup(t->i2c->adapter, &radio, &tv);
+ if (tv)
+ tv->mode_mask &= ~T_RADIO;
+
+ goto register_client;
+ }
+ kfree(t);
+ return -ENODEV;
+ case 0x42:
+ case 0x43:
+ case 0x4a:
+ case 0x4b:
+ /* If chip is not tda8290, don't register.
+ since it can be tda9887*/
+ if (tuner_symbol_probe(tda829x_probe, t->i2c->adapter,
+ t->i2c->addr) >= 0) {
+ tuner_dbg("tda829x detected\n");
+ } else {
+ /* Default is being tda9887 */
+ t->type = TUNER_TDA9887;
+ t->mode_mask = T_RADIO | T_ANALOG_TV;
+ goto register_client;
+ }
+ break;
+ case 0x60:
+ if (tuner_symbol_probe(tea5767_autodetection,
+ t->i2c->adapter, t->i2c->addr)
+ >= 0) {
+ t->type = TUNER_TEA5767;
+ t->mode_mask = T_RADIO;
+ /* Sets freq to FM range */
+ tuner_lookup(t->i2c->adapter, &radio, &tv);
+ if (tv)
+ tv->mode_mask &= ~T_RADIO;
+
+ goto register_client;
+ }
+ break;
+ }
+ }
+
+ /* Initializes only the first TV tuner on this adapter. Why only the
+ first? Because there are some devices (notably the ones with TI
+ tuners) that have more than one i2c address for the *same* device.
+ Experience shows that, except for just one case, the first
+ address is the right one. The exception is a Russian tuner
+ (ACORP_Y878F). So, the desired behavior is just to enable the
+ first found TV tuner. */
+ tuner_lookup(t->i2c->adapter, &radio, &tv);
+ if (tv == NULL) {
+ t->mode_mask = T_ANALOG_TV;
+ if (radio == NULL)
+ t->mode_mask |= T_RADIO;
+ tuner_dbg("Setting mode_mask to 0x%02x\n", t->mode_mask);
+ }
+
+ /* Should be just before return */
+register_client:
+ /* Sets a default mode */
+ if (t->mode_mask & T_ANALOG_TV)
+ t->mode = V4L2_TUNER_ANALOG_TV;
+ else
+ t->mode = V4L2_TUNER_RADIO;
+ set_type(client, t->type, t->mode_mask, t->config, t->fe.callback);
+ list_add_tail(&t->list, &tuner_list);
+
+ tuner_info("Tuner %d found with type(s)%s%s.\n",
+ t->type,
+ t->mode_mask & T_RADIO ? " Radio" : "",
+ t->mode_mask & T_ANALOG_TV ? " TV" : "");
+ return 0;
+}
+
+/**
+ * tuner_remove - detaches a tuner
+ *
+ * @client: i2c_client descriptor
+ */
+
+static int tuner_remove(struct i2c_client *client)
+{
+ struct tuner *t = to_tuner(i2c_get_clientdata(client));
+
+ v4l2_device_unregister_subdev(&t->sd);
+ tuner_detach(&t->fe);
+ t->fe.analog_demod_priv = NULL;
+
+ list_del(&t->list);
+ kfree(t);
+ return 0;
+}
+
+/*
+ * Functions to switch between Radio and TV
+ *
+ * A few cards have a separate I2C tuner for radio. Those routines
+ * take care of switching between TV/Radio mode, filtering only the
+ * commands that apply to the Radio or TV tuner.
+ */
+
+/**
+ * check_mode - Verify if tuner supports the requested mode
+ * @t: a pointer to the module's internal struct_tuner
+ *
+ * This function checks if the tuner is capable of tuning analog TV,
+ * digital TV or radio, depending on what the caller wants. If the
+ * tuner can't support that mode, it returns -EINVAL. Otherwise, it
+ * returns 0.
+ * This function is needed for boards that have a separate tuner for
+ * radio (like devices with tea5767).
+ * NOTE: mt20xx uses V4L2_TUNER_DIGITAL_TV and calls set_tv_freq to
+ * select a TV frequency. So, t_mode = T_ANALOG_TV could actually
+ * be used to represent a Digital TV too.
+ */
+static inline int check_mode(struct tuner *t, enum v4l2_tuner_type mode)
+{
+ int t_mode;
+ if (mode == V4L2_TUNER_RADIO)
+ t_mode = T_RADIO;
+ else
+ t_mode = T_ANALOG_TV;
+
+ if ((t_mode & t->mode_mask) == 0)
+ return -EINVAL;
+
+ return 0;
+}
+
+/**
+ * set_mode - Switch tuner to other mode.
+ * @t: a pointer to the module's internal struct_tuner
+ * @mode: enum v4l2_type (radio or TV)
+ *
+ * If tuner doesn't support the needed mode (radio or TV), prints a
+ * debug message and returns -EINVAL, changing its state to standby.
+ * Otherwise, changes the mode and returns 0.
+ */
+static int set_mode(struct tuner *t, enum v4l2_tuner_type mode)
+{
+ struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
+
+ if (mode != t->mode) {
+ if (check_mode(t, mode) == -EINVAL) {
+ tuner_dbg("Tuner doesn't support mode %d. "
+ "Putting tuner to sleep\n", mode);
+ t->standby = true;
+ if (analog_ops->standby)
+ analog_ops->standby(&t->fe);
+ return -EINVAL;
+ }
+ t->mode = mode;
+ tuner_dbg("Changing to mode %d\n", mode);
+ }
+ return 0;
+}
+
+/**
+ * set_freq - Set the tuner to the desired frequency.
+ * @t: a pointer to the module's internal struct_tuner
+ * @freq: frequency to set (0 means to use the current frequency)
+ */
+static void set_freq(struct tuner *t, unsigned int freq)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&t->sd);
+
+ if (t->mode == V4L2_TUNER_RADIO) {
+ if (!freq)
+ freq = t->radio_freq;
+ set_radio_freq(client, freq);
+ } else {
+ if (!freq)
+ freq = t->tv_freq;
+ set_tv_freq(client, freq);
+ }
+}
+
+/*
+ * Functions that are specific for TV mode
+ */
+
+/**
+ * set_tv_freq - Set tuner frequency, freq in Units of 62.5 kHz = 1/16MHz
+ *
+ * @c: i2c_client descriptor
+ * @freq: frequency
+ */
+static void set_tv_freq(struct i2c_client *c, unsigned int freq)
+{
+ struct tuner *t = to_tuner(i2c_get_clientdata(c));
+ struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
+
+ struct analog_parameters params = {
+ .mode = t->mode,
+ .audmode = t->audmode,
+ .std = t->std
+ };
+
+ if (t->type == UNSET) {
+ tuner_warn("tuner type not set\n");
+ return;
+ }
+ if (NULL == analog_ops->set_params) {
+ tuner_warn("Tuner has no way to set tv freq\n");
+ return;
+ }
+ if (freq < tv_range[0] * 16 || freq > tv_range[1] * 16) {
+ tuner_dbg("TV freq (%d.%02d) out of range (%d-%d)\n",
+ freq / 16, freq % 16 * 100 / 16, tv_range[0],
+ tv_range[1]);
+ /* V4L2 spec: if the freq is not possible then the closest
+ possible value should be selected */
+ if (freq < tv_range[0] * 16)
+ freq = tv_range[0] * 16;
+ else
+ freq = tv_range[1] * 16;
+ }
+ params.frequency = freq;
+ tuner_dbg("tv freq set to %d.%02d\n",
+ freq / 16, freq % 16 * 100 / 16);
+ t->tv_freq = freq;
+ t->standby = false;
+
+ analog_ops->set_params(&t->fe, &params);
+}
+
+/**
+ * tuner_fixup_std - force a given video standard variant
+ *
+ * @t: tuner internal struct
+ * @std: TV standard
+ *
+ * A few devices or drivers have problem to detect some standard variations.
+ * On other operational systems, the drivers generally have a per-country
+ * code, and some logic to apply per-country hacks. V4L2 API doesn't provide
+ * such hacks. Instead, it relies on a proper video standard selection from
+ * the userspace application. However, as some apps are buggy, not allowing
+ * to distinguish all video standard variations, a modprobe parameter can
+ * be used to force a video standard match.
+ */
+static v4l2_std_id tuner_fixup_std(struct tuner *t, v4l2_std_id std)
+{
+ if (pal[0] != '-' && (std & V4L2_STD_PAL) == V4L2_STD_PAL) {
+ switch (pal[0]) {
+ case '6':
+ return V4L2_STD_PAL_60;
+ case 'b':
+ case 'B':
+ case 'g':
+ case 'G':
+ return V4L2_STD_PAL_BG;
+ case 'i':
+ case 'I':
+ return V4L2_STD_PAL_I;
+ case 'd':
+ case 'D':
+ case 'k':
+ case 'K':
+ return V4L2_STD_PAL_DK;
+ case 'M':
+ case 'm':
+ return V4L2_STD_PAL_M;
+ case 'N':
+ case 'n':
+ if (pal[1] == 'c' || pal[1] == 'C')
+ return V4L2_STD_PAL_Nc;
+ return V4L2_STD_PAL_N;
+ default:
+ tuner_warn("pal= argument not recognised\n");
+ break;
+ }
+ }
+ if (secam[0] != '-' && (std & V4L2_STD_SECAM) == V4L2_STD_SECAM) {
+ switch (secam[0]) {
+ case 'b':
+ case 'B':
+ case 'g':
+ case 'G':
+ case 'h':
+ case 'H':
+ return V4L2_STD_SECAM_B |
+ V4L2_STD_SECAM_G |
+ V4L2_STD_SECAM_H;
+ case 'd':
+ case 'D':
+ case 'k':
+ case 'K':
+ return V4L2_STD_SECAM_DK;
+ case 'l':
+ case 'L':
+ if ((secam[1] == 'C') || (secam[1] == 'c'))
+ return V4L2_STD_SECAM_LC;
+ return V4L2_STD_SECAM_L;
+ default:
+ tuner_warn("secam= argument not recognised\n");
+ break;
+ }
+ }
+
+ if (ntsc[0] != '-' && (std & V4L2_STD_NTSC) == V4L2_STD_NTSC) {
+ switch (ntsc[0]) {
+ case 'm':
+ case 'M':
+ return V4L2_STD_NTSC_M;
+ case 'j':
+ case 'J':
+ return V4L2_STD_NTSC_M_JP;
+ case 'k':
+ case 'K':
+ return V4L2_STD_NTSC_M_KR;
+ default:
+ tuner_info("ntsc= argument not recognised\n");
+ break;
+ }
+ }
+ return std;
+}
+
+/*
+ * Functions that are specific for Radio mode
+ */
+
+/**
+ * set_radio_freq - Set tuner frequency, freq in Units of 62.5 Hz = 1/16kHz
+ *
+ * @c: i2c_client descriptor
+ * @freq: frequency
+ */
+static void set_radio_freq(struct i2c_client *c, unsigned int freq)
+{
+ struct tuner *t = to_tuner(i2c_get_clientdata(c));
+ struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
+
+ struct analog_parameters params = {
+ .mode = t->mode,
+ .audmode = t->audmode,
+ .std = t->std
+ };
+
+ if (t->type == UNSET) {
+ tuner_warn("tuner type not set\n");
+ return;
+ }
+ if (NULL == analog_ops->set_params) {
+ tuner_warn("tuner has no way to set radio frequency\n");
+ return;
+ }
+ if (freq < radio_range[0] * 16000 || freq > radio_range[1] * 16000) {
+ tuner_dbg("radio freq (%d.%02d) out of range (%d-%d)\n",
+ freq / 16000, freq % 16000 * 100 / 16000,
+ radio_range[0], radio_range[1]);
+ /* V4L2 spec: if the freq is not possible then the closest
+ possible value should be selected */
+ if (freq < radio_range[0] * 16000)
+ freq = radio_range[0] * 16000;
+ else
+ freq = radio_range[1] * 16000;
+ }
+ params.frequency = freq;
+ tuner_dbg("radio freq set to %d.%02d\n",
+ freq / 16000, freq % 16000 * 100 / 16000);
+ t->radio_freq = freq;
+ t->standby = false;
+
+ analog_ops->set_params(&t->fe, &params);
+}
+
+/*
+ * Debug function for reporting tuner status to userspace
+ */
+
+/**
+ * tuner_status - Dumps the current tuner status at dmesg
+ * @fe: pointer to struct dvb_frontend
+ *
+ * This callback is used only for driver debug purposes, answering to
+ * VIDIOC_LOG_STATUS. No changes should happen on this call.
+ */
+static void tuner_status(struct dvb_frontend *fe)
+{
+ struct tuner *t = fe->analog_demod_priv;
+ unsigned long freq, freq_fraction;
+ struct dvb_tuner_ops *fe_tuner_ops = &fe->ops.tuner_ops;
+ struct analog_demod_ops *analog_ops = &fe->ops.analog_ops;
+ const char *p;
+
+ switch (t->mode) {
+ case V4L2_TUNER_RADIO:
+ p = "radio";
+ break;
+ case V4L2_TUNER_DIGITAL_TV: /* Used by mt20xx */
+ p = "digital TV";
+ break;
+ case V4L2_TUNER_ANALOG_TV:
+ default:
+ p = "analog TV";
+ break;
+ }
+ if (t->mode == V4L2_TUNER_RADIO) {
+ freq = t->radio_freq / 16000;
+ freq_fraction = (t->radio_freq % 16000) * 100 / 16000;
+ } else {
+ freq = t->tv_freq / 16;
+ freq_fraction = (t->tv_freq % 16) * 100 / 16;
+ }
+ tuner_info("Tuner mode: %s%s\n", p,
+ t->standby ? " on standby mode" : "");
+ tuner_info("Frequency: %lu.%02lu MHz\n", freq, freq_fraction);
+ tuner_info("Standard: 0x%08lx\n", (unsigned long)t->std);
+ if (t->mode != V4L2_TUNER_RADIO)
+ return;
+ if (fe_tuner_ops->get_status) {
+ u32 tuner_status;
+
+ fe_tuner_ops->get_status(&t->fe, &tuner_status);
+ if (tuner_status & TUNER_STATUS_LOCKED)
+ tuner_info("Tuner is locked.\n");
+ if (tuner_status & TUNER_STATUS_STEREO)
+ tuner_info("Stereo: yes\n");
+ }
+ if (analog_ops->has_signal)
+ tuner_info("Signal strength: %d\n",
+ analog_ops->has_signal(fe));
+}
+
+/*
+ * Function to splicitly change mode to radio. Probably not needed anymore
+ */
+
+static int tuner_s_radio(struct v4l2_subdev *sd)
+{
+ struct tuner *t = to_tuner(sd);
+
+ if (set_mode(t, V4L2_TUNER_RADIO) == 0)
+ set_freq(t, 0);
+ return 0;
+}
+
+/*
+ * Tuner callbacks to handle userspace ioctl's
+ */
+
+/**
+ * tuner_s_power - controls the power state of the tuner
+ * @sd: pointer to struct v4l2_subdev
+ * @on: a zero value puts the tuner to sleep, non-zero wakes it up
+ */
+static int tuner_s_power(struct v4l2_subdev *sd, int on)
+{
+ struct tuner *t = to_tuner(sd);
+ struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
+
+ if (on) {
+ if (t->standby && set_mode(t, t->mode) == 0) {
+ tuner_dbg("Waking up tuner\n");
+ set_freq(t, 0);
+ }
+ return 0;
+ }
+
+ tuner_dbg("Putting tuner to sleep\n");
+ t->standby = true;
+ if (analog_ops->standby)
+ analog_ops->standby(&t->fe);
+ return 0;
+}
+
+static int tuner_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
+{
+ struct tuner *t = to_tuner(sd);
+
+ if (set_mode(t, V4L2_TUNER_ANALOG_TV))
+ return 0;
+
+ t->std = tuner_fixup_std(t, std);
+ if (t->std != std)
+ tuner_dbg("Fixup standard %llx to %llx\n", std, t->std);
+ set_freq(t, 0);
+ return 0;
+}
+
+static int tuner_s_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f)
+{
+ struct tuner *t = to_tuner(sd);
+
+ if (set_mode(t, f->type) == 0)
+ set_freq(t, f->frequency);
+ return 0;
+}
+
+/**
+ * tuner_g_frequency - Get the tuned frequency for the tuner
+ * @sd: pointer to struct v4l2_subdev
+ * @f: pointer to struct v4l2_frequency
+ *
+ * At return, the structure f will be filled with tuner frequency
+ * if the tuner matches the f->type.
+ * Note: f->type should be initialized before calling it.
+ * This is done by either video_ioctl2 or by the bridge driver.
+ */
+static int tuner_g_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f)
+{
+ struct tuner *t = to_tuner(sd);
+ struct dvb_tuner_ops *fe_tuner_ops = &t->fe.ops.tuner_ops;
+
+ if (check_mode(t, f->type) == -EINVAL)
+ return 0;
+ if (f->type == t->mode && fe_tuner_ops->get_frequency && !t->standby) {
+ u32 abs_freq;
+
+ fe_tuner_ops->get_frequency(&t->fe, &abs_freq);
+ f->frequency = (V4L2_TUNER_RADIO == t->mode) ?
+ DIV_ROUND_CLOSEST(abs_freq * 2, 125) :
+ DIV_ROUND_CLOSEST(abs_freq, 62500);
+ } else {
+ f->frequency = (V4L2_TUNER_RADIO == f->type) ?
+ t->radio_freq : t->tv_freq;
+ }
+ return 0;
+}
+
+/**
+ * tuner_g_tuner - Fill in tuner information
+ * @sd: pointer to struct v4l2_subdev
+ * @vt: pointer to struct v4l2_tuner
+ *
+ * At return, the structure vt will be filled with tuner information
+ * if the tuner matches vt->type.
+ * Note: vt->type should be initialized before calling it.
+ * This is done by either video_ioctl2 or by the bridge driver.
+ */
+static int tuner_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
+{
+ struct tuner *t = to_tuner(sd);
+ struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
+ struct dvb_tuner_ops *fe_tuner_ops = &t->fe.ops.tuner_ops;
+
+ if (check_mode(t, vt->type) == -EINVAL)
+ return 0;
+ if (vt->type == t->mode && analog_ops->get_afc)
+ vt->afc = analog_ops->get_afc(&t->fe);
+ if (analog_ops->has_signal)
+ vt->signal = analog_ops->has_signal(&t->fe);
+ if (vt->type != V4L2_TUNER_RADIO) {
+ vt->capability |= V4L2_TUNER_CAP_NORM;
+ vt->rangelow = tv_range[0] * 16;
+ vt->rangehigh = tv_range[1] * 16;
+ return 0;
+ }
+
+ /* radio mode */
+ if (vt->type == t->mode) {
+ vt->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
+ if (fe_tuner_ops->get_status) {
+ u32 tuner_status;
+
+ fe_tuner_ops->get_status(&t->fe, &tuner_status);
+ vt->rxsubchans =
+ (tuner_status & TUNER_STATUS_STEREO) ?
+ V4L2_TUNER_SUB_STEREO :
+ V4L2_TUNER_SUB_MONO;
+ }
+ vt->audmode = t->audmode;
+ }
+ vt->capability |= V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
+ vt->rangelow = radio_range[0] * 16000;
+ vt->rangehigh = radio_range[1] * 16000;
+
+ return 0;
+}
+
+/**
+ * tuner_s_tuner - Set the tuner's audio mode
+ * @sd: pointer to struct v4l2_subdev
+ * @vt: pointer to struct v4l2_tuner
+ *
+ * Sets the audio mode if the tuner matches vt->type.
+ * Note: vt->type should be initialized before calling it.
+ * This is done by either video_ioctl2 or by the bridge driver.
+ */
+static int tuner_s_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
+{
+ struct tuner *t = to_tuner(sd);
+
+ if (set_mode(t, vt->type))
+ return 0;
+
+ if (t->mode == V4L2_TUNER_RADIO)
+ t->audmode = vt->audmode;
+ set_freq(t, 0);
+
+ return 0;
+}
+
+static int tuner_log_status(struct v4l2_subdev *sd)
+{
+ struct tuner *t = to_tuner(sd);
+ struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
+
+ if (analog_ops->tuner_status)
+ analog_ops->tuner_status(&t->fe);
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int tuner_suspend(struct device *dev)
+{
+ struct i2c_client *c = to_i2c_client(dev);
+ struct tuner *t = to_tuner(i2c_get_clientdata(c));
+ struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
+
+ tuner_dbg("suspend\n");
+
+ if (!t->standby && analog_ops->standby)
+ analog_ops->standby(&t->fe);
+
+ return 0;
+}
+
+static int tuner_resume(struct device *dev)
+{
+ struct i2c_client *c = to_i2c_client(dev);
+ struct tuner *t = to_tuner(i2c_get_clientdata(c));
+
+ tuner_dbg("resume\n");
+
+ if (!t->standby)
+ if (set_mode(t, t->mode) == 0)
+ set_freq(t, 0);
+
+ return 0;
+}
+#endif
+
+static int tuner_command(struct i2c_client *client, unsigned cmd, void *arg)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+
+ /* TUNER_SET_CONFIG is still called by tuner-simple.c, so we have
+ to handle it here.
+ There must be a better way of doing this... */
+ switch (cmd) {
+ case TUNER_SET_CONFIG:
+ return tuner_s_config(sd, arg);
+ }
+ return -ENOIOCTLCMD;
+}
+
+/*
+ * Callback structs
+ */
+
+static const struct v4l2_subdev_core_ops tuner_core_ops = {
+ .log_status = tuner_log_status,
+ .s_std = tuner_s_std,
+ .s_power = tuner_s_power,
+};
+
+static const struct v4l2_subdev_tuner_ops tuner_tuner_ops = {
+ .s_radio = tuner_s_radio,
+ .g_tuner = tuner_g_tuner,
+ .s_tuner = tuner_s_tuner,
+ .s_frequency = tuner_s_frequency,
+ .g_frequency = tuner_g_frequency,
+ .s_type_addr = tuner_s_type_addr,
+ .s_config = tuner_s_config,
+};
+
+static const struct v4l2_subdev_ops tuner_ops = {
+ .core = &tuner_core_ops,
+ .tuner = &tuner_tuner_ops,
+};
+
+/*
+ * I2C structs and module init functions
+ */
+
+static const struct dev_pm_ops tuner_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(tuner_suspend, tuner_resume)
+};
+
+static const struct i2c_device_id tuner_id[] = {
+ { "tuner", }, /* autodetect */
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, tuner_id);
+
+static struct i2c_driver tuner_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "tuner",
+ .pm = &tuner_pm_ops,
+ },
+ .probe = tuner_probe,
+ .remove = tuner_remove,
+ .command = tuner_command,
+ .id_table = tuner_id,
+};
+
+module_i2c_driver(tuner_driver);
+
+MODULE_DESCRIPTION("device driver for various TV and TV+FM radio tuners");
+MODULE_AUTHOR("Ralph Metzler, Gerd Knorr, Gunther Mayer");
+MODULE_LICENSE("GPL");

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