diff options
Diffstat (limited to 'drivers/media/radio/radio-trust.c')
| -rw-r--r-- | drivers/media/radio/radio-trust.c | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/drivers/media/radio/radio-trust.c b/drivers/media/radio/radio-trust.c new file mode 100644 index 000000000..dfb8b62f0 --- /dev/null +++ b/drivers/media/radio/radio-trust.c @@ -0,0 +1,243 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* radio-trust.c - Trust FM Radio card driver for Linux 2.2 + * by Eric Lammerts <eric@scintilla.utwente.nl> + * + * Based on radio-aztech.c. Original notes: + * + * Adapted to support the Video for Linux API by + * Russell Kroll <rkroll@exploits.org>. Based on original tuner code by: + * + * Quay Ly + * Donald Song + * Jason Lewis (jlewis@twilight.vtc.vsc.edu) + * Scott McGrath (smcgrath@twilight.vtc.vsc.edu) + * William McGrath (wmcgrath@twilight.vtc.vsc.edu) + * + * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@kernel.org> + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/ioport.h> +#include <linux/videodev2.h> +#include <linux/io.h> +#include <linux/slab.h> +#include <media/v4l2-device.h> +#include <media/v4l2-ioctl.h> +#include "radio-isa.h" + +MODULE_AUTHOR("Eric Lammerts, Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath"); +MODULE_DESCRIPTION("A driver for the Trust FM Radio card."); +MODULE_LICENSE("GPL"); +MODULE_VERSION("0.1.99"); + +/* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */ + +#ifndef CONFIG_RADIO_TRUST_PORT +#define CONFIG_RADIO_TRUST_PORT -1 +#endif + +#define TRUST_MAX 2 + +static int io[TRUST_MAX] = { [0] = CONFIG_RADIO_TRUST_PORT, + [1 ... (TRUST_MAX - 1)] = -1 }; +static int radio_nr[TRUST_MAX] = { [0 ... (TRUST_MAX - 1)] = -1 }; + +module_param_array(io, int, NULL, 0444); +MODULE_PARM_DESC(io, "I/O addresses of the Trust FM Radio card (0x350 or 0x358)"); +module_param_array(radio_nr, int, NULL, 0444); +MODULE_PARM_DESC(radio_nr, "Radio device numbers"); + +struct trust { + struct radio_isa_card isa; + int ioval; +}; + +static struct radio_isa_card *trust_alloc(void) +{ + struct trust *tr = kzalloc(sizeof(*tr), GFP_KERNEL); + + return tr ? &tr->isa : NULL; +} + +/* i2c addresses */ +#define TDA7318_ADDR 0x88 +#define TSA6060T_ADDR 0xc4 + +#define TR_DELAY do { inb(tr->isa.io); inb(tr->isa.io); inb(tr->isa.io); } while (0) +#define TR_SET_SCL outb(tr->ioval |= 2, tr->isa.io) +#define TR_CLR_SCL outb(tr->ioval &= 0xfd, tr->isa.io) +#define TR_SET_SDA outb(tr->ioval |= 1, tr->isa.io) +#define TR_CLR_SDA outb(tr->ioval &= 0xfe, tr->isa.io) + +static void write_i2c(struct trust *tr, int n, ...) +{ + unsigned char val, mask; + va_list args; + + va_start(args, n); + + /* start condition */ + TR_SET_SDA; + TR_SET_SCL; + TR_DELAY; + TR_CLR_SDA; + TR_CLR_SCL; + TR_DELAY; + + for (; n; n--) { + val = va_arg(args, unsigned); + for (mask = 0x80; mask; mask >>= 1) { + if (val & mask) + TR_SET_SDA; + else + TR_CLR_SDA; + TR_SET_SCL; + TR_DELAY; + TR_CLR_SCL; + TR_DELAY; + } + /* acknowledge bit */ + TR_SET_SDA; + TR_SET_SCL; + TR_DELAY; + TR_CLR_SCL; + TR_DELAY; + } + + /* stop condition */ + TR_CLR_SDA; + TR_DELAY; + TR_SET_SCL; + TR_DELAY; + TR_SET_SDA; + TR_DELAY; + + va_end(args); +} + +static int trust_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol) +{ + struct trust *tr = container_of(isa, struct trust, isa); + + tr->ioval = (tr->ioval & 0xf7) | (mute << 3); + outb(tr->ioval, isa->io); + write_i2c(tr, 2, TDA7318_ADDR, vol ^ 0x1f); + return 0; +} + +static int trust_s_stereo(struct radio_isa_card *isa, bool stereo) +{ + struct trust *tr = container_of(isa, struct trust, isa); + + tr->ioval = (tr->ioval & 0xfb) | (!stereo << 2); + outb(tr->ioval, isa->io); + return 0; +} + +static u32 trust_g_signal(struct radio_isa_card *isa) +{ + int i, v; + + for (i = 0, v = 0; i < 100; i++) + v |= inb(isa->io); + return (v & 1) ? 0 : 0xffff; +} + +static int trust_s_frequency(struct radio_isa_card *isa, u32 freq) +{ + struct trust *tr = container_of(isa, struct trust, isa); + + freq /= 160; /* Convert to 10 kHz units */ + freq += 1070; /* Add 10.7 MHz IF */ + write_i2c(tr, 5, TSA6060T_ADDR, (freq << 1) | 1, + freq >> 7, 0x60 | ((freq >> 15) & 1), 0); + return 0; +} + +static int basstreble2chip[15] = { + 0, 1, 2, 3, 4, 5, 6, 7, 14, 13, 12, 11, 10, 9, 8 +}; + +static int trust_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct radio_isa_card *isa = + container_of(ctrl->handler, struct radio_isa_card, hdl); + struct trust *tr = container_of(isa, struct trust, isa); + + switch (ctrl->id) { + case V4L2_CID_AUDIO_BASS: + write_i2c(tr, 2, TDA7318_ADDR, 0x60 | basstreble2chip[ctrl->val]); + return 0; + case V4L2_CID_AUDIO_TREBLE: + write_i2c(tr, 2, TDA7318_ADDR, 0x70 | basstreble2chip[ctrl->val]); + return 0; + } + return -EINVAL; +} + +static const struct v4l2_ctrl_ops trust_ctrl_ops = { + .s_ctrl = trust_s_ctrl, +}; + +static int trust_initialize(struct radio_isa_card *isa) +{ + struct trust *tr = container_of(isa, struct trust, isa); + + tr->ioval = 0xf; + write_i2c(tr, 2, TDA7318_ADDR, 0x80); /* speaker att. LF = 0 dB */ + write_i2c(tr, 2, TDA7318_ADDR, 0xa0); /* speaker att. RF = 0 dB */ + write_i2c(tr, 2, TDA7318_ADDR, 0xc0); /* speaker att. LR = 0 dB */ + write_i2c(tr, 2, TDA7318_ADDR, 0xe0); /* speaker att. RR = 0 dB */ + write_i2c(tr, 2, TDA7318_ADDR, 0x40); /* stereo 1 input, gain = 18.75 dB */ + + v4l2_ctrl_new_std(&isa->hdl, &trust_ctrl_ops, + V4L2_CID_AUDIO_BASS, 0, 15, 1, 8); + v4l2_ctrl_new_std(&isa->hdl, &trust_ctrl_ops, + V4L2_CID_AUDIO_TREBLE, 0, 15, 1, 8); + return isa->hdl.error; +} + +static const struct radio_isa_ops trust_ops = { + .init = trust_initialize, + .alloc = trust_alloc, + .s_mute_volume = trust_s_mute_volume, + .s_frequency = trust_s_frequency, + .s_stereo = trust_s_stereo, + .g_signal = trust_g_signal, +}; + +static const int trust_ioports[] = { 0x350, 0x358 }; + +static struct radio_isa_driver trust_driver = { + .driver = { + .match = radio_isa_match, + .probe = radio_isa_probe, + .remove = radio_isa_remove, + .driver = { + .name = "radio-trust", + }, + }, + .io_params = io, + .radio_nr_params = radio_nr, + .io_ports = trust_ioports, + .num_of_io_ports = ARRAY_SIZE(trust_ioports), + .region_size = 2, + .card = "Trust FM Radio", + .ops = &trust_ops, + .has_stereo = true, + .max_volume = 31, +}; + +static int __init trust_init(void) +{ + return isa_register_driver(&trust_driver.driver, TRUST_MAX); +} + +static void __exit trust_exit(void) +{ + isa_unregister_driver(&trust_driver.driver); +} + +module_init(trust_init); +module_exit(trust_exit); |