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1// SPDX-License-Identifier: GPL-2.0-only2/* SF16-FMR2 and SF16-FMD2 radio driver for Linux3 * Copyright (c) 2011 Ondrej Zary4 *5 * Original driver was (c) 2000-2002 Ziglio Frediano, freddy77@angelfire.com6 * but almost nothing remained here after conversion to generic TEA575x7 * implementation8 */9 10#include <linux/delay.h>11#include <linux/module.h> /* Modules */12#include <linux/init.h> /* Initdata */13#include <linux/slab.h>14#include <linux/ioport.h> /* request_region */15#include <linux/io.h> /* outb, outb_p */16#include <linux/isa.h>17#include <linux/pnp.h>18#include <media/drv-intf/tea575x.h>19 20MODULE_AUTHOR("Ondrej Zary");21MODULE_DESCRIPTION("MediaForte SF16-FMR2 and SF16-FMD2 FM radio card driver");22MODULE_LICENSE("GPL");23 24/* these cards can only use two different ports (0x384 and 0x284) */25#define FMR2_MAX 226 27static int radio_nr[FMR2_MAX] = { [0 ... (FMR2_MAX - 1)] = -1 };28module_param_array(radio_nr, int, NULL, 0444);29MODULE_PARM_DESC(radio_nr, "Radio device numbers");30 31struct fmr2 {32 int io;33 struct v4l2_device v4l2_dev;34 struct snd_tea575x tea;35 struct v4l2_ctrl *volume;36 struct v4l2_ctrl *balance;37 bool is_fmd2;38};39 40static int num_fmr2_cards;41static struct fmr2 *fmr2_cards[FMR2_MAX];42static bool isa_registered;43static bool pnp_registered;44 45/* the port is hardwired on SF16-FMR2 */46#define FMR2_PORT 0x38447 48/* TEA575x tuner pins */49#define STR_DATA (1 << 0)50#define STR_CLK (1 << 1)51#define STR_WREN (1 << 2)52#define STR_MOST (1 << 3)53/* PT2254A/TC9154A volume control pins */54#define PT_ST (1 << 4)55#define PT_CK (1 << 5)56#define PT_DATA (1 << 6)57/* volume control presence pin */58#define FMR2_HASVOL (1 << 7)59 60static void fmr2_tea575x_set_pins(struct snd_tea575x *tea, u8 pins)61{62 struct fmr2 *fmr2 = tea->private_data;63 u8 bits = 0;64 65 bits |= (pins & TEA575X_DATA) ? STR_DATA : 0;66 bits |= (pins & TEA575X_CLK) ? STR_CLK : 0;67 /* WRITE_ENABLE is inverted, DATA must be high during read */68 bits |= (pins & TEA575X_WREN) ? 0 : STR_WREN | STR_DATA;69 70 outb(bits, fmr2->io);71}72 73static u8 fmr2_tea575x_get_pins(struct snd_tea575x *tea)74{75 struct fmr2 *fmr2 = tea->private_data;76 u8 bits = inb(fmr2->io);77 78 return ((bits & STR_DATA) ? TEA575X_DATA : 0) |79 ((bits & STR_MOST) ? TEA575X_MOST : 0);80}81 82static void fmr2_tea575x_set_direction(struct snd_tea575x *tea, bool output)83{84}85 86static const struct snd_tea575x_ops fmr2_tea_ops = {87 .set_pins = fmr2_tea575x_set_pins,88 .get_pins = fmr2_tea575x_get_pins,89 .set_direction = fmr2_tea575x_set_direction,90};91 92/* TC9154A/PT2254A volume control */93 94/* 18-bit shift register bit definitions */95#define TC9154A_ATT_MAJ_0DB (1 << 0)96#define TC9154A_ATT_MAJ_10DB (1 << 1)97#define TC9154A_ATT_MAJ_20DB (1 << 2)98#define TC9154A_ATT_MAJ_30DB (1 << 3)99#define TC9154A_ATT_MAJ_40DB (1 << 4)100#define TC9154A_ATT_MAJ_50DB (1 << 5)101#define TC9154A_ATT_MAJ_60DB (1 << 6)102 103#define TC9154A_ATT_MIN_0DB (1 << 7)104#define TC9154A_ATT_MIN_2DB (1 << 8)105#define TC9154A_ATT_MIN_4DB (1 << 9)106#define TC9154A_ATT_MIN_6DB (1 << 10)107#define TC9154A_ATT_MIN_8DB (1 << 11)108/* bit 12 is ignored */109#define TC9154A_CHANNEL_LEFT (1 << 13)110#define TC9154A_CHANNEL_RIGHT (1 << 14)111/* bits 15, 16, 17 must be 0 */112 113#define TC9154A_ATT_MAJ(x) (1 << x)114#define TC9154A_ATT_MIN(x) (1 << (7 + x))115 116static void tc9154a_set_pins(struct fmr2 *fmr2, u8 pins)117{118 if (!fmr2->tea.mute)119 pins |= STR_WREN;120 121 outb(pins, fmr2->io);122}123 124static void tc9154a_set_attenuation(struct fmr2 *fmr2, int att, u32 channel)125{126 int i;127 u32 reg;128 u8 bit;129 130 reg = TC9154A_ATT_MAJ(att / 10) | TC9154A_ATT_MIN((att % 10) / 2);131 reg |= channel;132 /* write 18-bit shift register, LSB first */133 for (i = 0; i < 18; i++) {134 bit = reg & (1 << i) ? PT_DATA : 0;135 tc9154a_set_pins(fmr2, bit);136 udelay(5);137 tc9154a_set_pins(fmr2, bit | PT_CK);138 udelay(5);139 tc9154a_set_pins(fmr2, bit);140 }141 142 /* latch register data */143 udelay(5);144 tc9154a_set_pins(fmr2, PT_ST);145 udelay(5);146 tc9154a_set_pins(fmr2, 0);147}148 149static int fmr2_s_ctrl(struct v4l2_ctrl *ctrl)150{151 struct snd_tea575x *tea = container_of(ctrl->handler, struct snd_tea575x, ctrl_handler);152 struct fmr2 *fmr2 = tea->private_data;153 int volume, balance, left, right;154 155 switch (ctrl->id) {156 case V4L2_CID_AUDIO_VOLUME:157 volume = ctrl->val;158 balance = fmr2->balance->cur.val;159 break;160 case V4L2_CID_AUDIO_BALANCE:161 balance = ctrl->val;162 volume = fmr2->volume->cur.val;163 break;164 default:165 return -EINVAL;166 }167 168 left = right = volume;169 if (balance < 0)170 right = max(0, right + balance);171 if (balance > 0)172 left = max(0, left - balance);173 174 tc9154a_set_attenuation(fmr2, abs(left - 68), TC9154A_CHANNEL_LEFT);175 tc9154a_set_attenuation(fmr2, abs(right - 68), TC9154A_CHANNEL_RIGHT);176 177 return 0;178}179 180static const struct v4l2_ctrl_ops fmr2_ctrl_ops = {181 .s_ctrl = fmr2_s_ctrl,182};183 184static int fmr2_tea_ext_init(struct snd_tea575x *tea)185{186 struct fmr2 *fmr2 = tea->private_data;187 188 /* FMR2 can have volume control, FMD2 can't (uses SB16 mixer) */189 if (!fmr2->is_fmd2 && inb(fmr2->io) & FMR2_HASVOL) {190 fmr2->volume = v4l2_ctrl_new_std(&tea->ctrl_handler, &fmr2_ctrl_ops, V4L2_CID_AUDIO_VOLUME, 0, 68, 2, 56);191 fmr2->balance = v4l2_ctrl_new_std(&tea->ctrl_handler, &fmr2_ctrl_ops, V4L2_CID_AUDIO_BALANCE, -68, 68, 2, 0);192 if (tea->ctrl_handler.error) {193 printk(KERN_ERR "radio-sf16fmr2: can't initialize controls\n");194 return tea->ctrl_handler.error;195 }196 }197 198 return 0;199}200 201static const struct pnp_device_id fmr2_pnp_ids[] = {202 { .id = "MFRad13" }, /* tuner subdevice of SF16-FMD2 */203 { .id = "" }204};205MODULE_DEVICE_TABLE(pnp, fmr2_pnp_ids);206 207static int fmr2_probe(struct fmr2 *fmr2, struct device *pdev, int io)208{209 int err, i;210 char *card_name = fmr2->is_fmd2 ? "SF16-FMD2" : "SF16-FMR2";211 212 /* avoid errors if a card was already registered at given port */213 for (i = 0; i < num_fmr2_cards; i++)214 if (io == fmr2_cards[i]->io)215 return -EBUSY;216 217 strscpy(fmr2->v4l2_dev.name, "radio-sf16fmr2",218 sizeof(fmr2->v4l2_dev.name));219 fmr2->io = io;220 221 if (!request_region(fmr2->io, 2, fmr2->v4l2_dev.name)) {222 printk(KERN_ERR "radio-sf16fmr2: I/O port 0x%x already in use\n", fmr2->io);223 return -EBUSY;224 }225 226 dev_set_drvdata(pdev, fmr2);227 err = v4l2_device_register(pdev, &fmr2->v4l2_dev);228 if (err < 0) {229 v4l2_err(&fmr2->v4l2_dev, "Could not register v4l2_device\n");230 release_region(fmr2->io, 2);231 return err;232 }233 fmr2->tea.v4l2_dev = &fmr2->v4l2_dev;234 fmr2->tea.private_data = fmr2;235 fmr2->tea.radio_nr = radio_nr[num_fmr2_cards];236 fmr2->tea.ops = &fmr2_tea_ops;237 fmr2->tea.ext_init = fmr2_tea_ext_init;238 strscpy(fmr2->tea.card, card_name, sizeof(fmr2->tea.card));239 snprintf(fmr2->tea.bus_info, sizeof(fmr2->tea.bus_info), "%s:%s",240 fmr2->is_fmd2 ? "PnP" : "ISA", dev_name(pdev));241 242 if (snd_tea575x_init(&fmr2->tea, THIS_MODULE)) {243 printk(KERN_ERR "radio-sf16fmr2: Unable to detect TEA575x tuner\n");244 release_region(fmr2->io, 2);245 return -ENODEV;246 }247 248 printk(KERN_INFO "radio-sf16fmr2: %s radio card at 0x%x.\n",249 card_name, fmr2->io);250 return 0;251}252 253static int fmr2_isa_match(struct device *pdev, unsigned int ndev)254{255 struct fmr2 *fmr2 = kzalloc(sizeof(*fmr2), GFP_KERNEL);256 if (!fmr2)257 return 0;258 259 if (fmr2_probe(fmr2, pdev, FMR2_PORT)) {260 kfree(fmr2);261 return 0;262 }263 dev_set_drvdata(pdev, fmr2);264 fmr2_cards[num_fmr2_cards++] = fmr2;265 266 return 1;267}268 269static int fmr2_pnp_probe(struct pnp_dev *pdev, const struct pnp_device_id *id)270{271 int ret;272 struct fmr2 *fmr2 = kzalloc(sizeof(*fmr2), GFP_KERNEL);273 if (!fmr2)274 return -ENOMEM;275 276 fmr2->is_fmd2 = true;277 ret = fmr2_probe(fmr2, &pdev->dev, pnp_port_start(pdev, 0));278 if (ret) {279 kfree(fmr2);280 return ret;281 }282 pnp_set_drvdata(pdev, fmr2);283 fmr2_cards[num_fmr2_cards++] = fmr2;284 285 return 0;286}287 288static void fmr2_remove(struct fmr2 *fmr2)289{290 snd_tea575x_exit(&fmr2->tea);291 release_region(fmr2->io, 2);292 v4l2_device_unregister(&fmr2->v4l2_dev);293 kfree(fmr2);294}295 296static void fmr2_isa_remove(struct device *pdev, unsigned int ndev)297{298 fmr2_remove(dev_get_drvdata(pdev));299}300 301static void fmr2_pnp_remove(struct pnp_dev *pdev)302{303 fmr2_remove(pnp_get_drvdata(pdev));304 pnp_set_drvdata(pdev, NULL);305}306 307static struct isa_driver fmr2_isa_driver = {308 .match = fmr2_isa_match,309 .remove = fmr2_isa_remove,310 .driver = {311 .name = "radio-sf16fmr2",312 },313};314 315static struct pnp_driver fmr2_pnp_driver = {316 .name = "radio-sf16fmr2",317 .id_table = fmr2_pnp_ids,318 .probe = fmr2_pnp_probe,319 .remove = fmr2_pnp_remove,320};321 322static int __init fmr2_init(void)323{324 int ret;325 326 ret = pnp_register_driver(&fmr2_pnp_driver);327 if (!ret)328 pnp_registered = true;329 ret = isa_register_driver(&fmr2_isa_driver, 1);330 if (!ret)331 isa_registered = true;332 333 return (pnp_registered || isa_registered) ? 0 : ret;334}335 336static void __exit fmr2_exit(void)337{338 if (pnp_registered)339 pnp_unregister_driver(&fmr2_pnp_driver);340 if (isa_registered)341 isa_unregister_driver(&fmr2_isa_driver);342}343 344module_init(fmr2_init);345module_exit(fmr2_exit);346