1 // SPDX-License-Identifier: GPL-2.0-only 2 /* SF16-FMR2 and SF16-FMD2 radio driver for Linux 3 * Copyright (c) 2011 Ondrej Zary 4 * 5 * Original driver was (c) 2000-2002 Ziglio Frediano, freddy77@angelfire.com 6 * but almost nothing remained here after conversion to generic TEA575x 7 * implementation 8 */ 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 20 MODULE_AUTHOR("Ondrej Zary"); 21 MODULE_DESCRIPTION("MediaForte SF16-FMR2 and SF16-FMD2 FM radio card driver"); 22 MODULE_LICENSE("GPL"); 23 24 /* these cards can only use two different ports (0x384 and 0x284) */ 25 #define FMR2_MAX 2 26 27 static int radio_nr[FMR2_MAX] = { [0 ... (FMR2_MAX - 1)] = -1 }; 28 module_param_array(radio_nr, int, NULL, 0444); 29 MODULE_PARM_DESC(radio_nr, "Radio device numbers"); 30 31 struct 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 40 static int num_fmr2_cards; 41 static struct fmr2 *fmr2_cards[FMR2_MAX]; 42 static bool isa_registered; 43 static bool pnp_registered; 44 45 /* the port is hardwired on SF16-FMR2 */ 46 #define FMR2_PORT 0x384 47 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 60 static 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 73 static 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 82 static void fmr2_tea575x_set_direction(struct snd_tea575x *tea, bool output) 83 { 84 } 85 86 static 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)) 115 116 static 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 } 123 124 static 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 } 148 149 static 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 } 179 180 static const struct v4l2_ctrl_ops fmr2_ctrl_ops = { 181 .s_ctrl = fmr2_s_ctrl, 182 }; 183 184 static 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 } 200 201 static const struct pnp_device_id fmr2_pnp_ids[] = { 202 { .id = "MFRad13" }, /* tuner subdevice of SF16-FMD2 */ 203 { .id = "" } 204 }; 205 MODULE_DEVICE_TABLE(pnp, fmr2_pnp_ids); 206 207 static 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 } 252 253 static 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 } 268 269 static 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 } 287 288 static 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 } 295 296 static void fmr2_isa_remove(struct device *pdev, unsigned int ndev) 297 { 298 fmr2_remove(dev_get_drvdata(pdev)); 299 } 300 301 static void fmr2_pnp_remove(struct pnp_dev *pdev) 302 { 303 fmr2_remove(pnp_get_drvdata(pdev)); 304 pnp_set_drvdata(pdev, NULL); 305 } 306 307 static struct isa_driver fmr2_isa_driver = { 308 .match = fmr2_isa_match, 309 .remove = fmr2_isa_remove, 310 .driver = { 311 .name = "radio-sf16fmr2", 312 }, 313 }; 314 315 static 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 }; 321 322 static 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 } 335 336 static 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 } 343 344 module_init(fmr2_init); 345 module_exit(fmr2_exit); 346