Convert radio-sf16fmr2 to use generic TEA575x implementation. Most of the driver code goes away as SF16-FMR2 is basically just a TEA5757 tuner connected to ISA bus. The card can optionally be equipped with PT2254A volume control (equivalent of TC9154AP) - the volume setting is completely reworked and tested.
Signed-off-by: Ondrej Zary linux@rainbow-software.org
--- linux-2.6.39-rc2-/drivers/media/radio/radio-sf16fmr2.c 2011-04-06 03:30:43.000000000 +0200 +++ linux-2.6.39-rc2/drivers/media/radio/radio-sf16fmr2.c 2011-05-17 23:24:37.000000000 +0200 @@ -1,441 +1,184 @@ -/* SF16FMR2 radio driver for Linux radio support - * heavily based on fmi driver... - * (c) 2000-2002 Ziglio Frediano, freddy77@angelfire.com +/* SF16-FMR2 radio driver for Linux + * Copyright (c) 2011 Ondrej Zary * - * Notes on the hardware - * - * Frequency control is done digitally -- ie out(port,encodefreq(95.8)); - * No volume control - only mute/unmute - you have to use line volume - * - * For read stereo/mono you must wait 0.1 sec after set frequency and - * card unmuted so I set frequency on unmute - * Signal handling seem to work only on autoscanning (not implemented) - * - * Converted to V4L2 API by Mauro Carvalho Chehab mchehab@infradead.org + * Original driver was (c) 2000-2002 Ziglio Frediano, freddy77@angelfire.com + * but almost nothing remained here after conversion to generic TEA575x + * implementation */
+#include <linux/delay.h> #include <linux/module.h> /* Modules */ #include <linux/init.h> /* Initdata */ #include <linux/ioport.h> /* request_region */ -#include <linux/delay.h> /* udelay */ -#include <linux/videodev2.h> /* kernel radio structs */ -#include <linux/mutex.h> -#include <linux/version.h> /* for KERNEL_VERSION MACRO */ #include <linux/io.h> /* outb, outb_p */ -#include <media/v4l2-device.h> -#include <media/v4l2-ioctl.h> +#include <sound/tea575x-tuner.h>
-MODULE_AUTHOR("Ziglio Frediano, freddy77@angelfire.com"); -MODULE_DESCRIPTION("A driver for the SF16FMR2 radio."); +MODULE_AUTHOR("Ondrej Zary"); +MODULE_DESCRIPTION("MediaForte SF16-FMR2 FM radio card driver"); MODULE_LICENSE("GPL");
-static int io = 0x384; -static int radio_nr = -1; - -module_param(io, int, 0); -MODULE_PARM_DESC(io, "I/O address of the SF16FMR2 card (should be 0x384, if do not work try 0x284)"); -module_param(radio_nr, int, 0); - -#define RADIO_VERSION KERNEL_VERSION(0,0,2) - -#define AUD_VOL_INDEX 1 - -#undef DEBUG -//#define DEBUG 1 - -#ifdef DEBUG -# define debug_print(s) printk s -#else -# define debug_print(s) -#endif - -/* this should be static vars for module size */ -struct fmr2 -{ - struct v4l2_device v4l2_dev; - struct video_device vdev; - struct mutex lock; +struct fmr2 { int io; - int curvol; /* 0-15 */ - int mute; - int stereo; /* card is producing stereo audio */ - unsigned long curfreq; /* freq in kHz */ - int card_type; + struct snd_tea575x tea; };
+/* the port is hardwired so no need to support multiple cards */ +#define FMR2_PORT 0x384 static struct fmr2 fmr2_card;
-/* hw precision is 12.5 kHz - * It is only useful to give freq in interval of 200 (=0.0125Mhz), - * other bits will be truncated - */ -#define RSF16_ENCODE(x) ((x) / 200 + 856) -#define RSF16_MINFREQ (87 * 16000) -#define RSF16_MAXFREQ (108 * 16000) +/* TEA575x tuner pins */ +#define STR_DATA (1 << 0) +#define STR_CLK (1 << 1) +#define STR_WREN (1 << 2) +#define STR_MOST (1 << 3) +/* PT2254A/TC9154A volume control pins */ +#define PT_ST (1 << 4) +#define PT_CK (1 << 5) +#define PT_DATA (1 << 6) +/* volume control presence pin */ +#define FMR2_HASVOL (1 << 7)
-static inline void wait(int n, int io) +static void fmr2_tea575x_set_pins(struct snd_tea575x *tea, u8 pins) { - for (; n; --n) - inb(io); -} + struct fmr2 *fmr2 = tea->private_data; + u8 bits = 0;
-static void outbits(int bits, unsigned int data, int nWait, int io) -{ - int bit; + bits |= (pins & TEA575X_DATA) ? STR_DATA : 0; + bits |= (pins & TEA575X_CLK) ? STR_CLK : 0; + /* WRITE_ENABLE is inverted, DATA must be high during read */ + bits |= (pins & TEA575X_WREN) ? 0 : STR_WREN | STR_DATA;
- for (; --bits >= 0;) { - bit = (data >> bits) & 1; - outb(bit, io); - wait(nWait, io); - outb(bit | 2, io); - wait(nWait, io); - outb(bit, io); - wait(nWait, io); - } -} - -static inline void fmr2_mute(int io) -{ - outb(0x00, io); - wait(4, io); -} - -static inline void fmr2_unmute(int io) -{ - outb(0x04, io); - wait(4, io); -} - -static inline int fmr2_stereo_mode(int io) -{ - int n = inb(io); - - outb(6, io); - inb(io); - n = ((n >> 3) & 1) ^ 1; - debug_print((KERN_DEBUG "stereo: %d\n", n)); - return n; -} - -static int fmr2_product_info(struct fmr2 *dev) -{ - int n = inb(dev->io); - - n &= 0xC1; - if (n == 0) { - /* this should support volume set */ - dev->card_type = 12; - return 0; - } - /* not volume (mine is 11) */ - dev->card_type = (n == 128) ? 11 : 0; - return n; -} - -static inline int fmr2_getsigstr(struct fmr2 *dev) -{ - /* !!! works only if scanning freq */ - int res = 0xffff; - - outb(5, dev->io); - wait(4, dev->io); - if (!(inb(dev->io) & 1)) - res = 0; - debug_print((KERN_DEBUG "signal: %d\n", res)); - return res; -} - -/* set frequency and unmute card */ -static int fmr2_setfreq(struct fmr2 *dev) -{ - unsigned long freq = dev->curfreq; - - fmr2_mute(dev->io); - - /* 0x42 for mono output - * 0x102 forward scanning - * 0x182 scansione avanti - */ - outbits(9, 0x2, 3, dev->io); - outbits(16, RSF16_ENCODE(freq), 2, dev->io); - - fmr2_unmute(dev->io); - - /* wait 0.11 sec */ - msleep(110); - - /* NOTE if mute this stop radio - you must set freq on unmute */ - dev->stereo = fmr2_stereo_mode(dev->io); - return 0; -} - -/* !!! not tested, in my card this does't work !!! */ -static int fmr2_setvolume(struct fmr2 *dev) -{ - int vol[16] = { 0x021, 0x084, 0x090, 0x104, - 0x110, 0x204, 0x210, 0x402, - 0x404, 0x408, 0x410, 0x801, - 0x802, 0x804, 0x808, 0x810 }; - int i, a; - int n = vol[dev->curvol & 0x0f]; - - if (dev->card_type != 11) - return 1; - - for (i = 12; --i >= 0; ) { - a = ((n >> i) & 1) << 6; /* if (a==0) a = 0; else a = 0x40; */ - outb(a | 4, dev->io); - wait(4, dev->io); - outb(a | 0x24, dev->io); - wait(4, dev->io); - outb(a | 4, dev->io); - wait(4, dev->io); - } - for (i = 6; --i >= 0; ) { - a = ((0x18 >> i) & 1) << 6; - outb(a | 4, dev->io); - wait(4, dev->io); - outb(a | 0x24, dev->io); - wait(4, dev->io); - outb(a | 4, dev->io); - wait(4, dev->io); - } - wait(4, dev->io); - outb(0x14, dev->io); - return 0; -} - -static int vidioc_querycap(struct file *file, void *priv, - struct v4l2_capability *v) -{ - strlcpy(v->driver, "radio-sf16fmr2", sizeof(v->driver)); - strlcpy(v->card, "SF16-FMR2 radio", sizeof(v->card)); - strlcpy(v->bus_info, "ISA", sizeof(v->bus_info)); - v->version = RADIO_VERSION; - v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO; - return 0; + outb(bits, fmr2->io); }
-static int vidioc_g_tuner(struct file *file, void *priv, - struct v4l2_tuner *v) +static u8 fmr2_tea575x_get_pins(struct snd_tea575x *tea) { - struct fmr2 *fmr2 = video_drvdata(file); + struct fmr2 *fmr2 = tea->private_data; + u8 bits = inb(fmr2->io);
- if (v->index > 0) - return -EINVAL; - - strlcpy(v->name, "FM", sizeof(v->name)); - v->type = V4L2_TUNER_RADIO; - - v->rangelow = RSF16_MINFREQ; - v->rangehigh = RSF16_MAXFREQ; - v->rxsubchans = fmr2->stereo ? V4L2_TUNER_SUB_STEREO : - V4L2_TUNER_SUB_MONO; - v->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LOW; - v->audmode = V4L2_TUNER_MODE_STEREO; - mutex_lock(&fmr2->lock); - v->signal = fmr2_getsigstr(fmr2); - mutex_unlock(&fmr2->lock); - return 0; + return (bits & STR_DATA) ? TEA575X_DATA : 0 | + (bits & STR_MOST) ? TEA575X_MOST : 0; }
-static int vidioc_s_tuner(struct file *file, void *priv, - struct v4l2_tuner *v) +static void fmr2_tea575x_set_direction(struct snd_tea575x *tea, bool output) { - return v->index ? -EINVAL : 0; }
-static int vidioc_s_frequency(struct file *file, void *priv, - struct v4l2_frequency *f) -{ - struct fmr2 *fmr2 = video_drvdata(file); - - if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO) - return -EINVAL; - if (f->frequency < RSF16_MINFREQ || - f->frequency > RSF16_MAXFREQ) - return -EINVAL; - /* rounding in steps of 200 to match the freq - that will be used */ - fmr2->curfreq = (f->frequency / 200) * 200; - - /* set card freq (if not muted) */ - if (fmr2->curvol && !fmr2->mute) { - mutex_lock(&fmr2->lock); - fmr2_setfreq(fmr2); - mutex_unlock(&fmr2->lock); - } - return 0; -} +static struct snd_tea575x_ops fmr2_tea_ops = { + .set_pins = fmr2_tea575x_set_pins, + .get_pins = fmr2_tea575x_get_pins, + .set_direction = fmr2_tea575x_set_direction, +};
-static int vidioc_g_frequency(struct file *file, void *priv, - struct v4l2_frequency *f) -{ - struct fmr2 *fmr2 = video_drvdata(file); +/* TC9154A/PT2254A volume control */
- if (f->tuner != 0) - return -EINVAL; - f->type = V4L2_TUNER_RADIO; - f->frequency = fmr2->curfreq; - return 0; +/* 18-bit shift register bit definitions */ +#define TC9154A_ATT_MAJ_0DB (1 << 0) +#define TC9154A_ATT_MAJ_10DB (1 << 1) +#define TC9154A_ATT_MAJ_20DB (1 << 2) +#define TC9154A_ATT_MAJ_30DB (1 << 3) +#define TC9154A_ATT_MAJ_40DB (1 << 4) +#define TC9154A_ATT_MAJ_50DB (1 << 5) +#define TC9154A_ATT_MAJ_60DB (1 << 6) + +#define TC9154A_ATT_MIN_0DB (1 << 7) +#define TC9154A_ATT_MIN_2DB (1 << 8) +#define TC9154A_ATT_MIN_4DB (1 << 9) +#define TC9154A_ATT_MIN_6DB (1 << 10) +#define TC9154A_ATT_MIN_8DB (1 << 11) +/* bit 12 is ignored */ +#define TC9154A_CHANNEL_LEFT (1 << 13) +#define TC9154A_CHANNEL_RIGHT (1 << 14) +/* bits 15, 16, 17 must be 0 */ + +#define TC9154A_ATT_MAJ(x) (1 << x) +#define TC9154A_ATT_MIN(x) (1 << (7 + x)) + +static void tc9154a_set_pins(struct fmr2 *fmr2, u8 pins) +{ + if (!fmr2->tea.mute) + pins |= STR_WREN; + + outb(pins, fmr2->io); +} + +static void tc9154a_set_volume(struct fmr2 *fmr2, int volume) +{ + int i; + u32 reg; + u8 bit; + + reg = TC9154A_ATT_MAJ(volume / 10) | TC9154A_ATT_MIN((volume % 10) / 2); + reg |= TC9154A_CHANNEL_LEFT | TC9154A_CHANNEL_RIGHT; + /* write 18-bit shift register, LSB first */ + for (i = 0; i < 18; i++) { + bit = reg & (1 << i) ? PT_DATA : 0; + tc9154a_set_pins(fmr2, bit); + udelay(5); + tc9154a_set_pins(fmr2, bit | PT_CK); + udelay(5); + tc9154a_set_pins(fmr2, bit); + } + + /* latch register data */ + udelay(5); + tc9154a_set_pins(fmr2, PT_ST); + udelay(5); + tc9154a_set_pins(fmr2, 0); }
-static int vidioc_queryctrl(struct file *file, void *priv, - struct v4l2_queryctrl *qc) +static int fmr2_s_ctrl(struct v4l2_ctrl *ctrl) { - struct fmr2 *fmr2 = video_drvdata(file); - - switch (qc->id) { - case V4L2_CID_AUDIO_MUTE: - return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1); - case V4L2_CID_AUDIO_VOLUME: - /* Only card_type == 11 implements volume */ - if (fmr2->card_type == 11) - return v4l2_ctrl_query_fill(qc, 0, 15, 1, 0); - return v4l2_ctrl_query_fill(qc, 0, 1, 1, 0); - } - return -EINVAL; -} - -static int vidioc_g_ctrl(struct file *file, void *priv, - struct v4l2_control *ctrl) -{ - struct fmr2 *fmr2 = video_drvdata(file); + struct snd_tea575x *tea = container_of(ctrl->handler, struct snd_tea575x, ctrl_handler); + struct fmr2 *fmr2 = tea->private_data;
switch (ctrl->id) { - case V4L2_CID_AUDIO_MUTE: - ctrl->value = fmr2->mute; - return 0; case V4L2_CID_AUDIO_VOLUME: - ctrl->value = fmr2->curvol; + tc9154a_set_volume(fmr2, abs(ctrl->val - 68)); return 0; } - return -EINVAL; -} - -static int vidioc_s_ctrl(struct file *file, void *priv, - struct v4l2_control *ctrl) -{ - struct fmr2 *fmr2 = video_drvdata(file); - - switch (ctrl->id) { - case V4L2_CID_AUDIO_MUTE: - fmr2->mute = ctrl->value; - break; - case V4L2_CID_AUDIO_VOLUME: - fmr2->curvol = ctrl->value; - break; - default: - return -EINVAL; - }
-#ifdef DEBUG - if (fmr2->curvol && !fmr2->mute) - printk(KERN_DEBUG "unmute\n"); - else - printk(KERN_DEBUG "mute\n"); -#endif - - mutex_lock(&fmr2->lock); - if (fmr2->curvol && !fmr2->mute) { - fmr2_setvolume(fmr2); - /* Set frequency and unmute card */ - fmr2_setfreq(fmr2); - } else - fmr2_mute(fmr2->io); - mutex_unlock(&fmr2->lock); - return 0; -} - -static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) -{ - *i = 0; - return 0; + return -EINVAL; }
-static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) -{ - return i ? -EINVAL : 0; -} +static const struct v4l2_ctrl_ops fmr2_ctrl_ops = { + .s_ctrl = fmr2_s_ctrl, +};
-static int vidioc_g_audio(struct file *file, void *priv, - struct v4l2_audio *a) +static void fmr2_tea_ext_init(struct snd_tea575x *tea) { - a->index = 0; - strlcpy(a->name, "Radio", sizeof(a->name)); - a->capability = V4L2_AUDCAP_STEREO; - return 0; -} + struct fmr2 *fmr2 = tea->private_data;
-static int vidioc_s_audio(struct file *file, void *priv, - struct v4l2_audio *a) -{ - return a->index ? -EINVAL : 0; + if (inb(fmr2->io) & FMR2_HASVOL) { + v4l2_ctrl_new_std(&tea->ctrl_handler, &fmr2_ctrl_ops, V4L2_CID_AUDIO_VOLUME, 0, 68, 2, 50); + v4l2_ctrl_handler_setup(&tea->ctrl_handler); + } }
-static const struct v4l2_file_operations fmr2_fops = { - .owner = THIS_MODULE, - .unlocked_ioctl = video_ioctl2, -}; - -static const struct v4l2_ioctl_ops fmr2_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, -}; - static int __init fmr2_init(void) { struct fmr2 *fmr2 = &fmr2_card; - struct v4l2_device *v4l2_dev = &fmr2->v4l2_dev; - int res;
- strlcpy(v4l2_dev->name, "sf16fmr2", sizeof(v4l2_dev->name)); - fmr2->io = io; - fmr2->stereo = 1; - mutex_init(&fmr2->lock); + fmr2->io = FMR2_PORT;
- if (!request_region(fmr2->io, 2, "sf16fmr2")) { - v4l2_err(v4l2_dev, "request_region failed!\n"); + if (!request_region(fmr2->io, 2, "SF16-FMR2")) { + printk(KERN_ERR "I/O port 0x%x already in use\n", fmr2->io); return -EBUSY; }
- res = v4l2_device_register(NULL, v4l2_dev); - if (res < 0) { - release_region(fmr2->io, 2); - v4l2_err(v4l2_dev, "Could not register v4l2_device\n"); - return res; - } - - strlcpy(fmr2->vdev.name, v4l2_dev->name, sizeof(fmr2->vdev.name)); - fmr2->vdev.v4l2_dev = v4l2_dev; - fmr2->vdev.fops = &fmr2_fops; - fmr2->vdev.ioctl_ops = &fmr2_ioctl_ops; - fmr2->vdev.release = video_device_release_empty; - video_set_drvdata(&fmr2->vdev, fmr2); - - /* mute card - prevents noisy bootups */ - fmr2_mute(fmr2->io); - fmr2_product_info(fmr2); + fmr2->tea.private_data = fmr2; + fmr2->tea.ops = &fmr2_tea_ops; + fmr2->tea.ext_init = fmr2_tea_ext_init; + strlcpy(fmr2->tea.card, "SF16-FMR2", sizeof(fmr2->tea.card)); + strcpy(fmr2->tea.bus_info, "ISA");
- if (video_register_device(&fmr2->vdev, VFL_TYPE_RADIO, radio_nr) < 0) { - v4l2_device_unregister(v4l2_dev); + if (snd_tea575x_init(&fmr2->tea)) { + printk(KERN_ERR "Unable to detect TEA575x tuner\n"); release_region(fmr2->io, 2); - return -EINVAL; + return -ENODEV; }
- v4l2_info(v4l2_dev, "SF16FMR2 radio card driver at 0x%x.\n", fmr2->io); - debug_print((KERN_DEBUG "card_type %d\n", fmr2->card_type)); + printk(KERN_INFO "SF16-FMR2 radio card at 0x%x.\n", fmr2->io); return 0; }
@@ -443,22 +186,9 @@ static void __exit fmr2_exit(void) { struct fmr2 *fmr2 = &fmr2_card;
- video_unregister_device(&fmr2->vdev); - v4l2_device_unregister(&fmr2->v4l2_dev); + snd_tea575x_exit(&fmr2->tea); release_region(fmr2->io, 2); }
module_init(fmr2_init); module_exit(fmr2_exit); - -#ifndef MODULE - -static int __init fmr2_setup_io(char *str) -{ - get_option(&str, &io); - return 1; -} - -__setup("sf16fmr2=", fmr2_setup_io); - -#endif