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authorHans de Goede <hdegoede@redhat.com>2012-06-23 04:39:58 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2012-07-30 18:46:17 -0300
commit4faba767c6243b43ad975406fe027be7394e4591 (patch)
tree2c2d6848b37080ed12b554214b655b55d3e83241 /drivers/media/radio/radio-tea5777.c
parent7a3ed2d95e9ef3032700c2e56f3369d8652a6e8b (diff)
downloadlinux-linaro-stable-4faba767c6243b43ad975406fe027be7394e4591.tar.gz
[media] shark2: New driver for the Griffin radioSHARK v2 USB radio receiver
This driver consists of 2 parts, a generic tea5777 driver and a driver for the Griffin radioSHARK v2 USB radio receiver, which is the only driver using the generic tea5777 for now. This first version only implements FM support, once the the new VIDIOC_ENUM_FREQ_BANDS API is upstream I'll also add AM support. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/radio/radio-tea5777.c')
-rw-r--r--drivers/media/radio/radio-tea5777.c489
1 files changed, 489 insertions, 0 deletions
diff --git a/drivers/media/radio/radio-tea5777.c b/drivers/media/radio/radio-tea5777.c
new file mode 100644
index 000000000000..3e12179364f8
--- /dev/null
+++ b/drivers/media/radio/radio-tea5777.c
@@ -0,0 +1,489 @@
+/*
+ * v4l2 driver for TEA5777 Philips AM/FM radio tuner chips
+ *
+ * Copyright (c) 2012 Hans de Goede <hdegoede@redhat.com>
+ *
+ * Based on the ALSA driver for TEA5757/5759 Philips AM/FM radio tuner chips:
+ *
+ * Copyright (c) 2004 Jaroslav Kysela <perex@perex.cz>
+ *
+ * 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/delay.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-event.h>
+#include "radio-tea5777.h"
+
+MODULE_AUTHOR("Hans de Goede <perex@perex.cz>");
+MODULE_DESCRIPTION("Routines for control of TEA5777 Philips AM/FM radio tuner chips");
+MODULE_LICENSE("GPL");
+
+/* Fixed FM only band for now, will implement multi-band support when the
+ VIDIOC_ENUM_FREQ_BANDS API is upstream */
+#define TEA5777_FM_RANGELOW (76000 * 16)
+#define TEA5777_FM_RANGEHIGH (108000 * 16)
+
+#define TEA5777_FM_IF 150 /* kHz */
+#define TEA5777_FM_FREQ_STEP 50 /* kHz */
+
+/* Write reg, common bits */
+#define TEA5777_W_MUTE_MASK (1LL << 47)
+#define TEA5777_W_MUTE_SHIFT 47
+#define TEA5777_W_AM_FM_MASK (1LL << 46)
+#define TEA5777_W_AM_FM_SHIFT 46
+#define TEA5777_W_STB_MASK (1LL << 45)
+#define TEA5777_W_STB_SHIFT 45
+
+#define TEA5777_W_IFCE_MASK (1LL << 29)
+#define TEA5777_W_IFCE_SHIFT 29
+#define TEA5777_W_IFW_MASK (1LL << 28)
+#define TEA5777_W_IFW_SHIFT 28
+#define TEA5777_W_HILO_MASK (1LL << 27)
+#define TEA5777_W_HILO_SHIFT 27
+#define TEA5777_W_DBUS_MASK (1LL << 26)
+#define TEA5777_W_DBUS_SHIFT 26
+
+#define TEA5777_W_INTEXT_MASK (1LL << 24)
+#define TEA5777_W_INTEXT_SHIFT 24
+#define TEA5777_W_P1_MASK (1LL << 23)
+#define TEA5777_W_P1_SHIFT 23
+#define TEA5777_W_P0_MASK (1LL << 22)
+#define TEA5777_W_P0_SHIFT 22
+#define TEA5777_W_PEN1_MASK (1LL << 21)
+#define TEA5777_W_PEN1_SHIFT 21
+#define TEA5777_W_PEN0_MASK (1LL << 20)
+#define TEA5777_W_PEN0_SHIFT 20
+
+#define TEA5777_W_CHP0_MASK (1LL << 18)
+#define TEA5777_W_CHP0_SHIFT 18
+#define TEA5777_W_DEEM_MASK (1LL << 17)
+#define TEA5777_W_DEEM_SHIFT 17
+
+#define TEA5777_W_SEARCH_MASK (1LL << 7)
+#define TEA5777_W_SEARCH_SHIFT 7
+#define TEA5777_W_PROGBLIM_MASK (1LL << 6)
+#define TEA5777_W_PROGBLIM_SHIFT 6
+#define TEA5777_W_UPDWN_MASK (1LL << 5)
+#define TEA5777_W_UPDWN_SHIFT 5
+#define TEA5777_W_SLEV_MASK (3LL << 3)
+#define TEA5777_W_SLEV_SHIFT 3
+
+/* Write reg, FM specific bits */
+#define TEA5777_W_FM_PLL_MASK (0x1fffLL << 32)
+#define TEA5777_W_FM_PLL_SHIFT 32
+#define TEA5777_W_FM_FREF_MASK (0x03LL << 30)
+#define TEA5777_W_FM_FREF_SHIFT 30
+#define TEA5777_W_FM_FREF_VALUE 0 /* 50 kHz tune steps, 150 kHz IF */
+
+#define TEA5777_W_FM_FORCEMONO_MASK (1LL << 15)
+#define TEA5777_W_FM_FORCEMONO_SHIFT 15
+#define TEA5777_W_FM_SDSOFF_MASK (1LL << 14)
+#define TEA5777_W_FM_SDSOFF_SHIFT 14
+#define TEA5777_W_FM_DOFF_MASK (1LL << 13)
+#define TEA5777_W_FM_DOFF_SHIFT 13
+
+#define TEA5777_W_FM_STEP_MASK (3LL << 1)
+#define TEA5777_W_FM_STEP_SHIFT 1
+
+/* Write reg, AM specific bits */
+#define TEA5777_W_AM_PLL_MASK (0x7ffLL << 34)
+#define TEA5777_W_AM_PLL_SHIFT 34
+#define TEA5777_W_AM_AGCRF_MASK (1LL << 33)
+#define TEA5777_W_AM_AGCRF_SHIFT 33
+#define TEA5777_W_AM_AGCIF_MASK (1LL << 32)
+#define TEA5777_W_AM_AGCIF_SHIFT 32
+#define TEA5777_W_AM_MWLW_MASK (1LL << 31)
+#define TEA5777_W_AM_MWLW_SHIFT 31
+#define TEA5777_W_AM_LNA_MASK (1LL << 30)
+#define TEA5777_W_AM_LNA_SHIFT 30
+
+#define TEA5777_W_AM_PEAK_MASK (1LL << 25)
+#define TEA5777_W_AM_PEAK_SHIFT 25
+
+#define TEA5777_W_AM_RFB_MASK (1LL << 16)
+#define TEA5777_W_AM_RFB_SHIFT 16
+#define TEA5777_W_AM_CALLIGN_MASK (1LL << 15)
+#define TEA5777_W_AM_CALLIGN_SHIFT 15
+#define TEA5777_W_AM_CBANK_MASK (0x7fLL << 8)
+#define TEA5777_W_AM_CBANK_SHIFT 8
+
+#define TEA5777_W_AM_DELAY_MASK (1LL << 2)
+#define TEA5777_W_AM_DELAY_SHIFT 2
+#define TEA5777_W_AM_STEP_MASK (1LL << 1)
+#define TEA5777_W_AM_STEP_SHIFT 1
+
+/* Read reg, common bits */
+#define TEA5777_R_LEVEL_MASK (0x0f << 17)
+#define TEA5777_R_LEVEL_SHIFT 17
+#define TEA5777_R_SFOUND_MASK (0x01 << 16)
+#define TEA5777_R_SFOUND_SHIFT 16
+#define TEA5777_R_BLIM_MASK (0x01 << 15)
+#define TEA5777_R_BLIM_SHIFT 15
+
+/* Read reg, FM specific bits */
+#define TEA5777_R_FM_STEREO_MASK (0x01 << 21)
+#define TEA5777_R_FM_STEREO_SHIFT 21
+#define TEA5777_R_FM_PLL_MASK 0x1fff
+#define TEA5777_R_FM_PLL_SHIFT 0
+
+static u32 tea5777_freq_to_v4l2_freq(struct radio_tea5777 *tea, u32 freq)
+{
+ return (freq * TEA5777_FM_FREQ_STEP + TEA5777_FM_IF) * 16;
+}
+
+static int radio_tea5777_set_freq(struct radio_tea5777 *tea)
+{
+ u64 freq;
+ int res;
+
+ freq = clamp_t(u32, tea->freq,
+ TEA5777_FM_RANGELOW, TEA5777_FM_RANGEHIGH);
+ freq = (freq + 8) / 16; /* to kHz */
+
+ freq = (freq - TEA5777_FM_IF) / TEA5777_FM_FREQ_STEP;
+
+ tea->write_reg &= ~(TEA5777_W_FM_PLL_MASK | TEA5777_W_FM_FREF_MASK);
+ tea->write_reg |= freq << TEA5777_W_FM_PLL_SHIFT;
+ tea->write_reg |= TEA5777_W_FM_FREF_VALUE << TEA5777_W_FM_FREF_SHIFT;
+
+ res = tea->ops->write_reg(tea, tea->write_reg);
+ if (res)
+ return res;
+
+ tea->needs_write = false;
+ tea->read_reg = -1;
+ tea->freq = tea5777_freq_to_v4l2_freq(tea, freq);
+
+ return 0;
+}
+
+static int radio_tea5777_update_read_reg(struct radio_tea5777 *tea, int wait)
+{
+ int res;
+
+ if (tea->read_reg != -1)
+ return 0;
+
+ if (tea->write_before_read && tea->needs_write) {
+ res = radio_tea5777_set_freq(tea);
+ if (res)
+ return res;
+ }
+
+ if (wait) {
+ if (schedule_timeout_interruptible(msecs_to_jiffies(wait)))
+ return -ERESTARTSYS;
+ }
+
+ res = tea->ops->read_reg(tea, &tea->read_reg);
+ if (res)
+ return res;
+
+ tea->needs_write = true;
+ return 0;
+}
+
+/*
+ * Linux Video interface
+ */
+
+static int vidioc_querycap(struct file *file, void *priv,
+ struct v4l2_capability *v)
+{
+ struct radio_tea5777 *tea = video_drvdata(file);
+
+ strlcpy(v->driver, tea->v4l2_dev->name, sizeof(v->driver));
+ strlcpy(v->card, tea->card, sizeof(v->card));
+ strlcat(v->card, " TEA5777", sizeof(v->card));
+ strlcpy(v->bus_info, tea->bus_info, sizeof(v->bus_info));
+ v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
+ v->device_caps |= V4L2_CAP_HW_FREQ_SEEK;
+ v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS;
+ return 0;
+}
+
+static int vidioc_g_tuner(struct file *file, void *priv,
+ struct v4l2_tuner *v)
+{
+ struct radio_tea5777 *tea = video_drvdata(file);
+ int res;
+
+ if (v->index > 0)
+ return -EINVAL;
+
+ res = radio_tea5777_update_read_reg(tea, 0);
+ if (res)
+ return res;
+
+ memset(v, 0, sizeof(*v));
+ if (tea->has_am)
+ strlcpy(v->name, "AM/FM", sizeof(v->name));
+ else
+ strlcpy(v->name, "FM", sizeof(v->name));
+ v->type = V4L2_TUNER_RADIO;
+ v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
+ V4L2_TUNER_CAP_HWSEEK_BOUNDED;
+ v->rangelow = TEA5777_FM_RANGELOW;
+ v->rangehigh = TEA5777_FM_RANGEHIGH;
+ v->rxsubchans = (tea->read_reg & TEA5777_R_FM_STEREO_MASK) ?
+ V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO;
+ v->audmode = (tea->write_reg & TEA5777_W_FM_FORCEMONO_MASK) ?
+ V4L2_TUNER_MODE_MONO : V4L2_TUNER_MODE_STEREO;
+ /* shift - 12 to convert 4-bits (0-15) scale to 16-bits (0-65535) */
+ v->signal = (tea->read_reg & TEA5777_R_LEVEL_MASK) >>
+ (TEA5777_R_LEVEL_SHIFT - 12);
+
+ /* Invalidate read_reg, so that next call we return up2date signal */
+ tea->read_reg = -1;
+
+ return 0;
+}
+
+static int vidioc_s_tuner(struct file *file, void *priv,
+ struct v4l2_tuner *v)
+{
+ struct radio_tea5777 *tea = video_drvdata(file);
+
+ if (v->index)
+ return -EINVAL;
+
+ if (v->audmode == V4L2_TUNER_MODE_MONO)
+ tea->write_reg |= TEA5777_W_FM_FORCEMONO_MASK;
+ else
+ tea->write_reg &= ~TEA5777_W_FM_FORCEMONO_MASK;
+
+ return radio_tea5777_set_freq(tea);
+}
+
+static int vidioc_g_frequency(struct file *file, void *priv,
+ struct v4l2_frequency *f)
+{
+ struct radio_tea5777 *tea = video_drvdata(file);
+
+ if (f->tuner != 0)
+ return -EINVAL;
+ f->type = V4L2_TUNER_RADIO;
+ f->frequency = tea->freq;
+ return 0;
+}
+
+static int vidioc_s_frequency(struct file *file, void *priv,
+ struct v4l2_frequency *f)
+{
+ struct radio_tea5777 *tea = video_drvdata(file);
+
+ if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
+ return -EINVAL;
+
+ tea->freq = f->frequency;
+ return radio_tea5777_set_freq(tea);
+}
+
+static int vidioc_s_hw_freq_seek(struct file *file, void *fh,
+ struct v4l2_hw_freq_seek *a)
+{
+ struct radio_tea5777 *tea = video_drvdata(file);
+ u32 orig_freq = tea->freq;
+ unsigned long timeout;
+ int res, spacing = 200 * 16; /* 200 kHz */
+ /* These are fixed *for now* */
+ const u32 seek_rangelow = TEA5777_FM_RANGELOW;
+ const u32 seek_rangehigh = TEA5777_FM_RANGEHIGH;
+
+ if (a->tuner || a->wrap_around)
+ return -EINVAL;
+
+ tea->write_reg |= TEA5777_W_PROGBLIM_MASK;
+ if (seek_rangelow != tea->seek_rangelow) {
+ tea->write_reg &= ~TEA5777_W_UPDWN_MASK;
+ tea->freq = seek_rangelow;
+ res = radio_tea5777_set_freq(tea);
+ if (res)
+ goto leave;
+ tea->seek_rangelow = tea->freq;
+ }
+ if (seek_rangehigh != tea->seek_rangehigh) {
+ tea->write_reg |= TEA5777_W_UPDWN_MASK;
+ tea->freq = seek_rangehigh;
+ res = radio_tea5777_set_freq(tea);
+ if (res)
+ goto leave;
+ tea->seek_rangehigh = tea->freq;
+ }
+ tea->write_reg &= ~TEA5777_W_PROGBLIM_MASK;
+
+ tea->write_reg |= TEA5777_W_SEARCH_MASK;
+ if (a->seek_upward) {
+ tea->write_reg |= TEA5777_W_UPDWN_MASK;
+ tea->freq = orig_freq + spacing;
+ } else {
+ tea->write_reg &= ~TEA5777_W_UPDWN_MASK;
+ tea->freq = orig_freq - spacing;
+ }
+ res = radio_tea5777_set_freq(tea);
+ if (res)
+ goto leave;
+
+ timeout = jiffies + msecs_to_jiffies(5000);
+ for (;;) {
+ if (time_after(jiffies, timeout)) {
+ res = -ENODATA;
+ break;
+ }
+
+ res = radio_tea5777_update_read_reg(tea, 100);
+ if (res)
+ break;
+
+ /*
+ * Note we use tea->freq to track how far we've searched sofar
+ * this is necessary to ensure we continue seeking at the right
+ * point, in the write_before_read case.
+ */
+ tea->freq = (tea->read_reg & TEA5777_R_FM_PLL_MASK);
+ tea->freq = tea5777_freq_to_v4l2_freq(tea, tea->freq);
+
+ if ((tea->read_reg & TEA5777_R_SFOUND_MASK)) {
+ tea->write_reg &= ~TEA5777_W_SEARCH_MASK;
+ return 0;
+ }
+
+ if (tea->read_reg & TEA5777_R_BLIM_MASK) {
+ res = -ENODATA;
+ break;
+ }
+
+ /* Force read_reg update */
+ tea->read_reg = -1;
+ }
+leave:
+ tea->write_reg &= ~TEA5777_W_PROGBLIM_MASK;
+ tea->write_reg &= ~TEA5777_W_SEARCH_MASK;
+ tea->freq = orig_freq;
+ radio_tea5777_set_freq(tea);
+ return res;
+}
+
+static int tea575x_s_ctrl(struct v4l2_ctrl *c)
+{
+ struct radio_tea5777 *tea =
+ container_of(c->handler, struct radio_tea5777, ctrl_handler);
+
+ switch (c->id) {
+ case V4L2_CID_AUDIO_MUTE:
+ if (c->val)
+ tea->write_reg |= TEA5777_W_MUTE_MASK;
+ else
+ tea->write_reg &= ~TEA5777_W_MUTE_MASK;
+
+ return radio_tea5777_set_freq(tea);
+ }
+
+ return -EINVAL;
+}
+
+static const struct v4l2_file_operations tea575x_fops = {
+ .unlocked_ioctl = video_ioctl2,
+ .open = v4l2_fh_open,
+ .release = v4l2_fh_release,
+ .poll = v4l2_ctrl_poll,
+};
+
+static const struct v4l2_ioctl_ops tea575x_ioctl_ops = {
+ .vidioc_querycap = vidioc_querycap,
+ .vidioc_g_tuner = vidioc_g_tuner,
+ .vidioc_s_tuner = vidioc_s_tuner,
+ .vidioc_g_frequency = vidioc_g_frequency,
+ .vidioc_s_frequency = vidioc_s_frequency,
+ .vidioc_s_hw_freq_seek = vidioc_s_hw_freq_seek,
+ .vidioc_log_status = v4l2_ctrl_log_status,
+ .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+static const struct video_device tea575x_radio = {
+ .ioctl_ops = &tea575x_ioctl_ops,
+ .release = video_device_release_empty,
+};
+
+static const struct v4l2_ctrl_ops tea575x_ctrl_ops = {
+ .s_ctrl = tea575x_s_ctrl,
+};
+
+int radio_tea5777_init(struct radio_tea5777 *tea, struct module *owner)
+{
+ int res;
+
+ tea->write_reg = (1LL << TEA5777_W_IFCE_SHIFT) |
+ (1LL << TEA5777_W_IFW_SHIFT) |
+ (1LL << TEA5777_W_INTEXT_SHIFT) |
+ (1LL << TEA5777_W_CHP0_SHIFT) |
+ (2LL << TEA5777_W_SLEV_SHIFT);
+ tea->freq = 90500 * 16; /* 90.5Mhz default */
+ res = radio_tea5777_set_freq(tea);
+ if (res) {
+ v4l2_err(tea->v4l2_dev, "can't set initial freq (%d)\n", res);
+ return res;
+ }
+
+ tea->vd = tea575x_radio;
+ video_set_drvdata(&tea->vd, tea);
+ mutex_init(&tea->mutex);
+ strlcpy(tea->vd.name, tea->v4l2_dev->name, sizeof(tea->vd.name));
+ tea->vd.lock = &tea->mutex;
+ tea->vd.v4l2_dev = tea->v4l2_dev;
+ tea->fops = tea575x_fops;
+ tea->fops.owner = owner;
+ tea->vd.fops = &tea->fops;
+ set_bit(V4L2_FL_USE_FH_PRIO, &tea->vd.flags);
+
+ tea->vd.ctrl_handler = &tea->ctrl_handler;
+ v4l2_ctrl_handler_init(&tea->ctrl_handler, 1);
+ v4l2_ctrl_new_std(&tea->ctrl_handler, &tea575x_ctrl_ops,
+ V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
+ res = tea->ctrl_handler.error;
+ if (res) {
+ v4l2_err(tea->v4l2_dev, "can't initialize controls\n");
+ v4l2_ctrl_handler_free(&tea->ctrl_handler);
+ return res;
+ }
+ v4l2_ctrl_handler_setup(&tea->ctrl_handler);
+
+ res = video_register_device(&tea->vd, VFL_TYPE_RADIO, -1);
+ if (res) {
+ v4l2_err(tea->v4l2_dev, "can't register video device!\n");
+ v4l2_ctrl_handler_free(tea->vd.ctrl_handler);
+ return res;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(radio_tea5777_init);
+
+void radio_tea5777_exit(struct radio_tea5777 *tea)
+{
+ video_unregister_device(&tea->vd);
+ v4l2_ctrl_handler_free(tea->vd.ctrl_handler);
+}
+EXPORT_SYMBOL_GPL(radio_tea5777_exit);