| /* |
| * Zoltrix Radio Plus driver |
| * Copyright 1998 C. van Schaik <carl@leg.uct.ac.za> |
| * |
| * BUGS |
| * Due to the inconsistency in reading from the signal flags |
| * it is difficult to get an accurate tuned signal. |
| * |
| * It seems that the card is not linear to 0 volume. It cuts off |
| * at a low volume, and it is not possible (at least I have not found) |
| * to get fine volume control over the low volume range. |
| * |
| * Some code derived from code by Romolo Manfredini |
| * romolo@bicnet.it |
| * |
| * 1999-05-06 - (C. van Schaik) |
| * - Make signal strength and stereo scans |
| * kinder to cpu while in delay |
| * 1999-01-05 - (C. van Schaik) |
| * - Changed tuning to 1/160Mhz accuracy |
| * - Added stereo support |
| * (card defaults to stereo) |
| * (can explicitly force mono on the card) |
| * (can detect if station is in stereo) |
| * - Added unmute function |
| * - Reworked ioctl functions |
| * 2002-07-15 - Fix Stereo typo |
| * |
| * 2006-07-24 - Converted to V4L2 API |
| * by Mauro Carvalho Chehab <mchehab@infradead.org> |
| * |
| * Converted to the radio-isa framework by Hans Verkuil <hans.verkuil@cisco.com> |
| * |
| * Note that this is the driver for the Zoltrix Radio Plus. |
| * This driver does not work for the Zoltrix Radio Plus 108 or the |
| * Zoltrix Radio Plus for Windows. |
| * |
| * Fully tested with the Keene USB FM Transmitter and the v4l2-compliance tool. |
| */ |
| |
| #include <linux/module.h> /* Modules */ |
| #include <linux/init.h> /* Initdata */ |
| #include <linux/ioport.h> /* request_region */ |
| #include <linux/delay.h> /* udelay, msleep */ |
| #include <linux/videodev2.h> /* kernel radio structs */ |
| #include <linux/mutex.h> |
| #include <linux/io.h> /* outb, outb_p */ |
| #include <linux/slab.h> |
| #include <media/v4l2-device.h> |
| #include <media/v4l2-ioctl.h> |
| #include "radio-isa.h" |
| |
| MODULE_AUTHOR("C. van Schaik"); |
| MODULE_DESCRIPTION("A driver for the Zoltrix Radio Plus."); |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION("0.1.99"); |
| |
| #ifndef CPTCFG_RADIO_ZOLTRIX_PORT |
| #define CPTCFG_RADIO_ZOLTRIX_PORT -1 |
| #endif |
| |
| #define ZOLTRIX_MAX 2 |
| |
| static int io[ZOLTRIX_MAX] = { [0] = CPTCFG_RADIO_ZOLTRIX_PORT, |
| [1 ... (ZOLTRIX_MAX - 1)] = -1 }; |
| static int radio_nr[ZOLTRIX_MAX] = { [0 ... (ZOLTRIX_MAX - 1)] = -1 }; |
| |
| module_param_array(io, int, NULL, 0444); |
| MODULE_PARM_DESC(io, "I/O addresses of the Zoltrix Radio Plus card (0x20c or 0x30c)"); |
| module_param_array(radio_nr, int, NULL, 0444); |
| MODULE_PARM_DESC(radio_nr, "Radio device numbers"); |
| |
| struct zoltrix { |
| struct radio_isa_card isa; |
| int curvol; |
| bool muted; |
| }; |
| |
| static struct radio_isa_card *zoltrix_alloc(void) |
| { |
| struct zoltrix *zol = kzalloc(sizeof(*zol), GFP_KERNEL); |
| |
| return zol ? &zol->isa : NULL; |
| } |
| |
| static int zoltrix_s_mute_volume(struct radio_isa_card *isa, bool mute, int vol) |
| { |
| struct zoltrix *zol = container_of(isa, struct zoltrix, isa); |
| |
| zol->curvol = vol; |
| zol->muted = mute; |
| if (mute || vol == 0) { |
| outb(0, isa->io); |
| outb(0, isa->io); |
| inb(isa->io + 3); /* Zoltrix needs to be read to confirm */ |
| return 0; |
| } |
| |
| outb(vol - 1, isa->io); |
| msleep(10); |
| inb(isa->io + 2); |
| return 0; |
| } |
| |
| /* tunes the radio to the desired frequency */ |
| static int zoltrix_s_frequency(struct radio_isa_card *isa, u32 freq) |
| { |
| struct zoltrix *zol = container_of(isa, struct zoltrix, isa); |
| struct v4l2_device *v4l2_dev = &isa->v4l2_dev; |
| unsigned long long bitmask, f, m; |
| bool stereo = isa->stereo; |
| int i; |
| |
| if (freq == 0) { |
| v4l2_warn(v4l2_dev, "cannot set a frequency of 0.\n"); |
| return -EINVAL; |
| } |
| |
| m = (freq / 160 - 8800) * 2; |
| f = (unsigned long long)m + 0x4d1c; |
| |
| bitmask = 0xc480402c10080000ull; |
| i = 45; |
| |
| outb(0, isa->io); |
| outb(0, isa->io); |
| inb(isa->io + 3); /* Zoltrix needs to be read to confirm */ |
| |
| outb(0x40, isa->io); |
| outb(0xc0, isa->io); |
| |
| bitmask = (bitmask ^ ((f & 0xff) << 47) ^ ((f & 0xff00) << 30) ^ (stereo << 31)); |
| while (i--) { |
| if ((bitmask & 0x8000000000000000ull) != 0) { |
| outb(0x80, isa->io); |
| udelay(50); |
| outb(0x00, isa->io); |
| udelay(50); |
| outb(0x80, isa->io); |
| udelay(50); |
| } else { |
| outb(0xc0, isa->io); |
| udelay(50); |
| outb(0x40, isa->io); |
| udelay(50); |
| outb(0xc0, isa->io); |
| udelay(50); |
| } |
| bitmask *= 2; |
| } |
| /* termination sequence */ |
| outb(0x80, isa->io); |
| outb(0xc0, isa->io); |
| outb(0x40, isa->io); |
| udelay(1000); |
| inb(isa->io + 2); |
| udelay(1000); |
| |
| return zoltrix_s_mute_volume(isa, zol->muted, zol->curvol); |
| } |
| |
| /* Get signal strength */ |
| static u32 zoltrix_g_rxsubchans(struct radio_isa_card *isa) |
| { |
| struct zoltrix *zol = container_of(isa, struct zoltrix, isa); |
| int a, b; |
| |
| outb(0x00, isa->io); /* This stuff I found to do nothing */ |
| outb(zol->curvol, isa->io); |
| msleep(20); |
| |
| a = inb(isa->io); |
| msleep(10); |
| b = inb(isa->io); |
| |
| return (a == b && a == 0xcf) ? |
| V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO; |
| } |
| |
| static u32 zoltrix_g_signal(struct radio_isa_card *isa) |
| { |
| struct zoltrix *zol = container_of(isa, struct zoltrix, isa); |
| int a, b; |
| |
| outb(0x00, isa->io); /* This stuff I found to do nothing */ |
| outb(zol->curvol, isa->io); |
| msleep(20); |
| |
| a = inb(isa->io); |
| msleep(10); |
| b = inb(isa->io); |
| |
| if (a != b) |
| return 0; |
| |
| /* I found this out by playing with a binary scanner on the card io */ |
| return (a == 0xcf || a == 0xdf || a == 0xef) ? 0xffff : 0; |
| } |
| |
| static int zoltrix_s_stereo(struct radio_isa_card *isa, bool stereo) |
| { |
| return zoltrix_s_frequency(isa, isa->freq); |
| } |
| |
| static const struct radio_isa_ops zoltrix_ops = { |
| .alloc = zoltrix_alloc, |
| .s_mute_volume = zoltrix_s_mute_volume, |
| .s_frequency = zoltrix_s_frequency, |
| .s_stereo = zoltrix_s_stereo, |
| .g_rxsubchans = zoltrix_g_rxsubchans, |
| .g_signal = zoltrix_g_signal, |
| }; |
| |
| static const int zoltrix_ioports[] = { 0x20c, 0x30c }; |
| |
| static struct radio_isa_driver zoltrix_driver = { |
| .driver = { |
| .match = radio_isa_match, |
| .probe = radio_isa_probe, |
| .remove = radio_isa_remove, |
| .driver = { |
| .name = "radio-zoltrix", |
| }, |
| }, |
| .io_params = io, |
| .radio_nr_params = radio_nr, |
| .io_ports = zoltrix_ioports, |
| .num_of_io_ports = ARRAY_SIZE(zoltrix_ioports), |
| .region_size = 2, |
| .card = "Zoltrix Radio Plus", |
| .ops = &zoltrix_ops, |
| .has_stereo = true, |
| .max_volume = 15, |
| }; |
| |
| static int __init zoltrix_init(void) |
| { |
| return isa_register_driver(&zoltrix_driver.driver, ZOLTRIX_MAX); |
| } |
| |
| static void __exit zoltrix_exit(void) |
| { |
| isa_unregister_driver(&zoltrix_driver.driver); |
| } |
| |
| module_init(zoltrix_init); |
| module_exit(zoltrix_exit); |
| |