linux/sound/pcmcia/vx/vxp_ops.c
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   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Driver for Digigram VXpocket soundcards
   4 *
   5 * lowlevel routines for VXpocket soundcards
   6 *
   7 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
   8 */
   9
  10#include <linux/delay.h>
  11#include <linux/device.h>
  12#include <linux/firmware.h>
  13#include <linux/io.h>
  14#include <sound/core.h>
  15#include "vxpocket.h"
  16
  17
  18static int vxp_reg_offset[VX_REG_MAX] = {
  19        [VX_ICR]        = 0x00,         // ICR
  20        [VX_CVR]        = 0x01,         // CVR
  21        [VX_ISR]        = 0x02,         // ISR
  22        [VX_IVR]        = 0x03,         // IVR
  23        [VX_RXH]        = 0x05,         // RXH
  24        [VX_RXM]        = 0x06,         // RXM
  25        [VX_RXL]        = 0x07,         // RXL
  26        [VX_DMA]        = 0x04,         // DMA
  27        [VX_CDSP]       = 0x08,         // CDSP
  28        [VX_LOFREQ]     = 0x09,         // LFREQ
  29        [VX_HIFREQ]     = 0x0a,         // HFREQ
  30        [VX_DATA]       = 0x0b,         // DATA
  31        [VX_MICRO]      = 0x0c,         // MICRO
  32        [VX_DIALOG]     = 0x0d,         // DIALOG
  33        [VX_CSUER]      = 0x0e,         // CSUER
  34        [VX_RUER]       = 0x0f,         // RUER
  35};
  36
  37
  38static inline unsigned long vxp_reg_addr(struct vx_core *_chip, int reg)
  39{
  40        struct snd_vxpocket *chip = to_vxpocket(_chip);
  41        return chip->port + vxp_reg_offset[reg];
  42}
  43
  44/*
  45 * snd_vx_inb - read a byte from the register
  46 * @offset: register offset
  47 */
  48static unsigned char vxp_inb(struct vx_core *chip, int offset)
  49{
  50        return inb(vxp_reg_addr(chip, offset));
  51}
  52
  53/*
  54 * snd_vx_outb - write a byte on the register
  55 * @offset: the register offset
  56 * @val: the value to write
  57 */
  58static void vxp_outb(struct vx_core *chip, int offset, unsigned char val)
  59{
  60        outb(val, vxp_reg_addr(chip, offset));
  61}
  62
  63/*
  64 * redefine macros to call directly
  65 */
  66#undef vx_inb
  67#define vx_inb(chip,reg)        vxp_inb((struct vx_core *)(chip), VX_##reg)
  68#undef vx_outb
  69#define vx_outb(chip,reg,val)   vxp_outb((struct vx_core *)(chip), VX_##reg,val)
  70
  71
  72/*
  73 * vx_check_magic - check the magic word on xilinx
  74 *
  75 * returns zero if a magic word is detected, or a negative error code.
  76 */
  77static int vx_check_magic(struct vx_core *chip)
  78{
  79        unsigned long end_time = jiffies + HZ / 5;
  80        int c;
  81        do {
  82                c = vx_inb(chip, CDSP);
  83                if (c == CDSP_MAGIC)
  84                        return 0;
  85                msleep(10);
  86        } while (time_after_eq(end_time, jiffies));
  87        snd_printk(KERN_ERR "cannot find xilinx magic word (%x)\n", c);
  88        return -EIO;
  89}
  90
  91
  92/*
  93 * vx_reset_dsp - reset the DSP
  94 */
  95
  96#define XX_DSP_RESET_WAIT_TIME          2       /* ms */
  97
  98static void vxp_reset_dsp(struct vx_core *_chip)
  99{
 100        struct snd_vxpocket *chip = to_vxpocket(_chip);
 101
 102        /* set the reset dsp bit to 1 */
 103        vx_outb(chip, CDSP, chip->regCDSP | VXP_CDSP_DSP_RESET_MASK);
 104        vx_inb(chip, CDSP);
 105        mdelay(XX_DSP_RESET_WAIT_TIME);
 106        /* reset the bit */
 107        chip->regCDSP &= ~VXP_CDSP_DSP_RESET_MASK;
 108        vx_outb(chip, CDSP, chip->regCDSP);
 109        vx_inb(chip, CDSP);
 110        mdelay(XX_DSP_RESET_WAIT_TIME);
 111}
 112
 113/*
 114 * reset codec bit
 115 */
 116static void vxp_reset_codec(struct vx_core *_chip)
 117{
 118        struct snd_vxpocket *chip = to_vxpocket(_chip);
 119
 120        /* Set the reset CODEC bit to 1. */
 121        vx_outb(chip, CDSP, chip->regCDSP | VXP_CDSP_CODEC_RESET_MASK);
 122        vx_inb(chip, CDSP);
 123        msleep(10);
 124        /* Set the reset CODEC bit to 0. */
 125        chip->regCDSP &= ~VXP_CDSP_CODEC_RESET_MASK;
 126        vx_outb(chip, CDSP, chip->regCDSP);
 127        vx_inb(chip, CDSP);
 128        msleep(1);
 129}
 130
 131/*
 132 * vx_load_xilinx_binary - load the xilinx binary image
 133 * the binary image is the binary array converted from the bitstream file.
 134 */
 135static int vxp_load_xilinx_binary(struct vx_core *_chip, const struct firmware *fw)
 136{
 137        struct snd_vxpocket *chip = to_vxpocket(_chip);
 138        unsigned int i;
 139        int c;
 140        int regCSUER, regRUER;
 141        const unsigned char *image;
 142        unsigned char data;
 143
 144        /* Switch to programmation mode */
 145        chip->regDIALOG |= VXP_DLG_XILINX_REPROG_MASK;
 146        vx_outb(chip, DIALOG, chip->regDIALOG);
 147
 148        /* Save register CSUER and RUER */
 149        regCSUER = vx_inb(chip, CSUER);
 150        regRUER = vx_inb(chip, RUER);
 151
 152        /* reset HF0 and HF1 */
 153        vx_outb(chip, ICR, 0);
 154
 155        /* Wait for answer HF2 equal to 1 */
 156        snd_printdd(KERN_DEBUG "check ISR_HF2\n");
 157        if (vx_check_isr(_chip, ISR_HF2, ISR_HF2, 20) < 0)
 158                goto _error;
 159
 160        /* set HF1 for loading xilinx binary */
 161        vx_outb(chip, ICR, ICR_HF1);
 162        image = fw->data;
 163        for (i = 0; i < fw->size; i++, image++) {
 164                data = *image;
 165                if (vx_wait_isr_bit(_chip, ISR_TX_EMPTY) < 0)
 166                        goto _error;
 167                vx_outb(chip, TXL, data);
 168                /* wait for reading */
 169                if (vx_wait_for_rx_full(_chip) < 0)
 170                        goto _error;
 171                c = vx_inb(chip, RXL);
 172                if (c != (int)data)
 173                        snd_printk(KERN_ERR "vxpocket: load xilinx mismatch at %d: 0x%x != 0x%x\n", i, c, (int)data);
 174        }
 175
 176        /* reset HF1 */
 177        vx_outb(chip, ICR, 0);
 178
 179        /* wait for HF3 */
 180        if (vx_check_isr(_chip, ISR_HF3, ISR_HF3, 20) < 0)
 181                goto _error;
 182
 183        /* read the number of bytes received */
 184        if (vx_wait_for_rx_full(_chip) < 0)
 185                goto _error;
 186
 187        c = (int)vx_inb(chip, RXH) << 16;
 188        c |= (int)vx_inb(chip, RXM) << 8;
 189        c |= vx_inb(chip, RXL);
 190
 191        snd_printdd(KERN_DEBUG "xilinx: dsp size received 0x%x, orig 0x%zx\n", c, fw->size);
 192
 193        vx_outb(chip, ICR, ICR_HF0);
 194
 195        /* TEMPO 250ms : wait until Xilinx is downloaded */
 196        msleep(300);
 197
 198        /* test magical word */
 199        if (vx_check_magic(_chip) < 0)
 200                goto _error;
 201
 202        /* Restore register 0x0E and 0x0F (thus replacing COR and FCSR) */
 203        vx_outb(chip, CSUER, regCSUER);
 204        vx_outb(chip, RUER, regRUER);
 205
 206        /* Reset the Xilinx's signal enabling IO access */
 207        chip->regDIALOG |= VXP_DLG_XILINX_REPROG_MASK;
 208        vx_outb(chip, DIALOG, chip->regDIALOG);
 209        vx_inb(chip, DIALOG);
 210        msleep(10);
 211        chip->regDIALOG &= ~VXP_DLG_XILINX_REPROG_MASK;
 212        vx_outb(chip, DIALOG, chip->regDIALOG);
 213        vx_inb(chip, DIALOG);
 214
 215        /* Reset of the Codec */
 216        vxp_reset_codec(_chip);
 217        vx_reset_dsp(_chip);
 218
 219        return 0;
 220
 221 _error:
 222        vx_outb(chip, CSUER, regCSUER);
 223        vx_outb(chip, RUER, regRUER);
 224        chip->regDIALOG &= ~VXP_DLG_XILINX_REPROG_MASK;
 225        vx_outb(chip, DIALOG, chip->regDIALOG);
 226        return -EIO;
 227}
 228
 229
 230/*
 231 * vxp_load_dsp - load_dsp callback
 232 */
 233static int vxp_load_dsp(struct vx_core *vx, int index, const struct firmware *fw)
 234{
 235        int err;
 236
 237        switch (index) {
 238        case 0:
 239                /* xilinx boot */
 240                if ((err = vx_check_magic(vx)) < 0)
 241                        return err;
 242                if ((err = snd_vx_load_boot_image(vx, fw)) < 0)
 243                        return err;
 244                return 0;
 245        case 1:
 246                /* xilinx image */
 247                return vxp_load_xilinx_binary(vx, fw);
 248        case 2:
 249                /* DSP boot */
 250                return snd_vx_dsp_boot(vx, fw);
 251        case 3:
 252                /* DSP image */
 253                return snd_vx_dsp_load(vx, fw);
 254        default:
 255                snd_BUG();
 256                return -EINVAL;
 257        }
 258}
 259                
 260
 261/*
 262 * vx_test_and_ack - test and acknowledge interrupt
 263 *
 264 * called from irq hander, too
 265 *
 266 * spinlock held!
 267 */
 268static int vxp_test_and_ack(struct vx_core *_chip)
 269{
 270        struct snd_vxpocket *chip = to_vxpocket(_chip);
 271
 272        /* not booted yet? */
 273        if (! (_chip->chip_status & VX_STAT_XILINX_LOADED))
 274                return -ENXIO;
 275
 276        if (! (vx_inb(chip, DIALOG) & VXP_DLG_MEMIRQ_MASK))
 277                return -EIO;
 278        
 279        /* ok, interrupts generated, now ack it */
 280        /* set ACQUIT bit up and down */
 281        vx_outb(chip, DIALOG, chip->regDIALOG | VXP_DLG_ACK_MEMIRQ_MASK);
 282        /* useless read just to spend some time and maintain
 283         * the ACQUIT signal up for a while ( a bus cycle )
 284         */
 285        vx_inb(chip, DIALOG);
 286        vx_outb(chip, DIALOG, chip->regDIALOG & ~VXP_DLG_ACK_MEMIRQ_MASK);
 287
 288        return 0;
 289}
 290
 291
 292/*
 293 * vx_validate_irq - enable/disable IRQ
 294 */
 295static void vxp_validate_irq(struct vx_core *_chip, int enable)
 296{
 297        struct snd_vxpocket *chip = to_vxpocket(_chip);
 298
 299        /* Set the interrupt enable bit to 1 in CDSP register */
 300        if (enable)
 301                chip->regCDSP |= VXP_CDSP_VALID_IRQ_MASK;
 302        else
 303                chip->regCDSP &= ~VXP_CDSP_VALID_IRQ_MASK;
 304        vx_outb(chip, CDSP, chip->regCDSP);
 305}
 306
 307/*
 308 * vx_setup_pseudo_dma - set up the pseudo dma read/write mode.
 309 * @do_write: 0 = read, 1 = set up for DMA write
 310 */
 311static void vx_setup_pseudo_dma(struct vx_core *_chip, int do_write)
 312{
 313        struct snd_vxpocket *chip = to_vxpocket(_chip);
 314
 315        /* Interrupt mode and HREQ pin enabled for host transmit / receive data transfers */
 316        vx_outb(chip, ICR, do_write ? ICR_TREQ : ICR_RREQ);
 317        /* Reset the pseudo-dma register */
 318        vx_inb(chip, ISR);
 319        vx_outb(chip, ISR, 0);
 320
 321        /* Select DMA in read/write transfer mode and in 16-bit accesses */
 322        chip->regDIALOG |= VXP_DLG_DMA16_SEL_MASK;
 323        chip->regDIALOG |= do_write ? VXP_DLG_DMAWRITE_SEL_MASK : VXP_DLG_DMAREAD_SEL_MASK;
 324        vx_outb(chip, DIALOG, chip->regDIALOG);
 325
 326}
 327
 328/*
 329 * vx_release_pseudo_dma - disable the pseudo-DMA mode
 330 */
 331static void vx_release_pseudo_dma(struct vx_core *_chip)
 332{
 333        struct snd_vxpocket *chip = to_vxpocket(_chip);
 334
 335        /* Disable DMA and 16-bit accesses */
 336        chip->regDIALOG &= ~(VXP_DLG_DMAWRITE_SEL_MASK|
 337                             VXP_DLG_DMAREAD_SEL_MASK|
 338                             VXP_DLG_DMA16_SEL_MASK);
 339        vx_outb(chip, DIALOG, chip->regDIALOG);
 340        /* HREQ pin disabled. */
 341        vx_outb(chip, ICR, 0);
 342}
 343
 344/*
 345 * vx_pseudo_dma_write - write bulk data on pseudo-DMA mode
 346 * @count: data length to transfer in bytes
 347 *
 348 * data size must be aligned to 6 bytes to ensure the 24bit alignment on DSP.
 349 * NB: call with a certain lock!
 350 */
 351static void vxp_dma_write(struct vx_core *chip, struct snd_pcm_runtime *runtime,
 352                          struct vx_pipe *pipe, int count)
 353{
 354        long port = vxp_reg_addr(chip, VX_DMA);
 355        int offset = pipe->hw_ptr;
 356        unsigned short *addr = (unsigned short *)(runtime->dma_area + offset);
 357
 358        vx_setup_pseudo_dma(chip, 1);
 359        if (offset + count >= pipe->buffer_bytes) {
 360                int length = pipe->buffer_bytes - offset;
 361                count -= length;
 362                length >>= 1; /* in 16bit words */
 363                /* Transfer using pseudo-dma. */
 364                for (; length > 0; length--) {
 365                        outw(*addr, port);
 366                        addr++;
 367                }
 368                addr = (unsigned short *)runtime->dma_area;
 369                pipe->hw_ptr = 0;
 370        }
 371        pipe->hw_ptr += count;
 372        count >>= 1; /* in 16bit words */
 373        /* Transfer using pseudo-dma. */
 374        for (; count > 0; count--) {
 375                outw(*addr, port);
 376                addr++;
 377        }
 378        vx_release_pseudo_dma(chip);
 379}
 380
 381
 382/*
 383 * vx_pseudo_dma_read - read bulk data on pseudo DMA mode
 384 * @offset: buffer offset in bytes
 385 * @count: data length to transfer in bytes
 386 *
 387 * the read length must be aligned to 6 bytes, as well as write.
 388 * NB: call with a certain lock!
 389 */
 390static void vxp_dma_read(struct vx_core *chip, struct snd_pcm_runtime *runtime,
 391                         struct vx_pipe *pipe, int count)
 392{
 393        struct snd_vxpocket *pchip = to_vxpocket(chip);
 394        long port = vxp_reg_addr(chip, VX_DMA);
 395        int offset = pipe->hw_ptr;
 396        unsigned short *addr = (unsigned short *)(runtime->dma_area + offset);
 397
 398        if (snd_BUG_ON(count % 2))
 399                return;
 400        vx_setup_pseudo_dma(chip, 0);
 401        if (offset + count >= pipe->buffer_bytes) {
 402                int length = pipe->buffer_bytes - offset;
 403                count -= length;
 404                length >>= 1; /* in 16bit words */
 405                /* Transfer using pseudo-dma. */
 406                for (; length > 0; length--)
 407                        *addr++ = inw(port);
 408                addr = (unsigned short *)runtime->dma_area;
 409                pipe->hw_ptr = 0;
 410        }
 411        pipe->hw_ptr += count;
 412        count >>= 1; /* in 16bit words */
 413        /* Transfer using pseudo-dma. */
 414        for (; count > 1; count--)
 415                *addr++ = inw(port);
 416        /* Disable DMA */
 417        pchip->regDIALOG &= ~VXP_DLG_DMAREAD_SEL_MASK;
 418        vx_outb(chip, DIALOG, pchip->regDIALOG);
 419        /* Read the last word (16 bits) */
 420        *addr = inw(port);
 421        /* Disable 16-bit accesses */
 422        pchip->regDIALOG &= ~VXP_DLG_DMA16_SEL_MASK;
 423        vx_outb(chip, DIALOG, pchip->regDIALOG);
 424        /* HREQ pin disabled. */
 425        vx_outb(chip, ICR, 0);
 426}
 427
 428
 429/*
 430 * write a codec data (24bit)
 431 */
 432static void vxp_write_codec_reg(struct vx_core *chip, int codec, unsigned int data)
 433{
 434        int i;
 435
 436        /* Activate access to the corresponding codec register */
 437        if (! codec)
 438                vx_inb(chip, LOFREQ);
 439        else
 440                vx_inb(chip, CODEC2);
 441                
 442        /* We have to send 24 bits (3 x 8 bits). Start with most signif. Bit */
 443        for (i = 0; i < 24; i++, data <<= 1)
 444                vx_outb(chip, DATA, ((data & 0x800000) ? VX_DATA_CODEC_MASK : 0));
 445        
 446        /* Terminate access to codec registers */
 447        vx_inb(chip, HIFREQ);
 448}
 449
 450
 451/*
 452 * vx_set_mic_boost - set mic boost level (on vxp440 only)
 453 * @boost: 0 = 20dB, 1 = +38dB
 454 */
 455void vx_set_mic_boost(struct vx_core *chip, int boost)
 456{
 457        struct snd_vxpocket *pchip = to_vxpocket(chip);
 458
 459        if (chip->chip_status & VX_STAT_IS_STALE)
 460                return;
 461
 462        mutex_lock(&chip->lock);
 463        if (pchip->regCDSP & P24_CDSP_MICS_SEL_MASK) {
 464                if (boost) {
 465                        /* boost: 38 dB */
 466                        pchip->regCDSP &= ~P24_CDSP_MIC20_SEL_MASK;
 467                        pchip->regCDSP |=  P24_CDSP_MIC38_SEL_MASK;
 468                } else {
 469                        /* minimum value: 20 dB */
 470                        pchip->regCDSP |=  P24_CDSP_MIC20_SEL_MASK;
 471                        pchip->regCDSP &= ~P24_CDSP_MIC38_SEL_MASK;
 472                }
 473                vx_outb(chip, CDSP, pchip->regCDSP);
 474        }
 475        mutex_unlock(&chip->lock);
 476}
 477
 478/*
 479 * remap the linear value (0-8) to the actual value (0-15)
 480 */
 481static int vx_compute_mic_level(int level)
 482{
 483        switch (level) {
 484        case 5: level = 6 ; break;
 485        case 6: level = 8 ; break;
 486        case 7: level = 11; break;
 487        case 8: level = 15; break;
 488        default: break ;
 489        }
 490        return level;
 491}
 492
 493/*
 494 * vx_set_mic_level - set mic level (on vxpocket only)
 495 * @level: the mic level = 0 - 8 (max)
 496 */
 497void vx_set_mic_level(struct vx_core *chip, int level)
 498{
 499        struct snd_vxpocket *pchip = to_vxpocket(chip);
 500
 501        if (chip->chip_status & VX_STAT_IS_STALE)
 502                return;
 503
 504        mutex_lock(&chip->lock);
 505        if (pchip->regCDSP & VXP_CDSP_MIC_SEL_MASK) {
 506                level = vx_compute_mic_level(level);
 507                vx_outb(chip, MICRO, level);
 508        }
 509        mutex_unlock(&chip->lock);
 510}
 511
 512
 513/*
 514 * change the input audio source
 515 */
 516static void vxp_change_audio_source(struct vx_core *_chip, int src)
 517{
 518        struct snd_vxpocket *chip = to_vxpocket(_chip);
 519
 520        switch (src) {
 521        case VX_AUDIO_SRC_DIGITAL:
 522                chip->regCDSP |= VXP_CDSP_DATAIN_SEL_MASK;
 523                vx_outb(chip, CDSP, chip->regCDSP);
 524                break;
 525        case VX_AUDIO_SRC_LINE:
 526                chip->regCDSP &= ~VXP_CDSP_DATAIN_SEL_MASK;
 527                if (_chip->type == VX_TYPE_VXP440)
 528                        chip->regCDSP &= ~P24_CDSP_MICS_SEL_MASK;
 529                else
 530                        chip->regCDSP &= ~VXP_CDSP_MIC_SEL_MASK;
 531                vx_outb(chip, CDSP, chip->regCDSP);
 532                break;
 533        case VX_AUDIO_SRC_MIC:
 534                chip->regCDSP &= ~VXP_CDSP_DATAIN_SEL_MASK;
 535                /* reset mic levels */
 536                if (_chip->type == VX_TYPE_VXP440) {
 537                        chip->regCDSP &= ~P24_CDSP_MICS_SEL_MASK;
 538                        if (chip->mic_level)
 539                                chip->regCDSP |=  P24_CDSP_MIC38_SEL_MASK;
 540                        else
 541                                chip->regCDSP |= P24_CDSP_MIC20_SEL_MASK;
 542                        vx_outb(chip, CDSP, chip->regCDSP);
 543                } else {
 544                        chip->regCDSP |= VXP_CDSP_MIC_SEL_MASK;
 545                        vx_outb(chip, CDSP, chip->regCDSP);
 546                        vx_outb(chip, MICRO, vx_compute_mic_level(chip->mic_level));
 547                }
 548                break;
 549        }
 550}
 551
 552/*
 553 * change the clock source
 554 * source = INTERNAL_QUARTZ or UER_SYNC
 555 */
 556static void vxp_set_clock_source(struct vx_core *_chip, int source)
 557{
 558        struct snd_vxpocket *chip = to_vxpocket(_chip);
 559
 560        if (source == INTERNAL_QUARTZ)
 561                chip->regCDSP &= ~VXP_CDSP_CLOCKIN_SEL_MASK;
 562        else
 563                chip->regCDSP |= VXP_CDSP_CLOCKIN_SEL_MASK;
 564        vx_outb(chip, CDSP, chip->regCDSP);
 565}
 566
 567
 568/*
 569 * reset the board
 570 */
 571static void vxp_reset_board(struct vx_core *_chip, int cold_reset)
 572{
 573        struct snd_vxpocket *chip = to_vxpocket(_chip);
 574
 575        chip->regCDSP = 0;
 576        chip->regDIALOG = 0;
 577}
 578
 579
 580/*
 581 * callbacks
 582 */
 583/* exported */
 584struct snd_vx_ops snd_vxpocket_ops = {
 585        .in8 = vxp_inb,
 586        .out8 = vxp_outb,
 587        .test_and_ack = vxp_test_and_ack,
 588        .validate_irq = vxp_validate_irq,
 589        .write_codec = vxp_write_codec_reg,
 590        .reset_codec = vxp_reset_codec,
 591        .change_audio_source = vxp_change_audio_source,
 592        .set_clock_source = vxp_set_clock_source,
 593        .load_dsp = vxp_load_dsp,
 594        .add_controls = vxp_add_mic_controls,
 595        .reset_dsp = vxp_reset_dsp,
 596        .reset_board = vxp_reset_board,
 597        .dma_write = vxp_dma_write,
 598        .dma_read = vxp_dma_read,
 599};
 600
Hosted by Missing Link Electronics. The original LXR software by the LXR community, this experimental version by lxr@linux.no.