sound/pcmcia/pdaudiocf/pdaudiocf_core.c

   1 /*
   2  * Driver for Sound Core PDAudioCF soundcard
   3  *
   4  * Copyright (c) 2003 by Jaroslav Kysela <perex@perex.cz>
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19  */
  20
  21 #include <linux/delay.h>
  22 #include <sound/core.h>
  23 #include <sound/info.h>
  24 #include "pdaudiocf.h"
  25 #include <sound/initval.h>
  26
  27 /*
  28  *
  29  */
  30 static unsigned char pdacf_ak4117_read(void *private_data, unsigned char reg)
  31 {
  32         struct snd_pdacf *chip = private_data;
  33         unsigned long timeout;
  34         unsigned long flags;
  35         unsigned char res;
  36
  37         spin_lock_irqsave(&chip->ak4117_lock, flags);
  38         timeout = 1000;
  39         while (pdacf_reg_read(chip, PDAUDIOCF_REG_SCR) & PDAUDIOCF_AK_SBP) {
  40                 udelay(5);
  41                 if (--timeout == 0) {
  42                         spin_unlock_irqrestore(&chip->ak4117_lock, flags);
  43                         snd_printk(KERN_ERR "AK4117 ready timeout (read)\n");
  44                         return 0;
  45                 }
  46         }
  47         pdacf_reg_write(chip, PDAUDIOCF_REG_AK_IFR, (u16)reg << 8);
  48         timeout = 1000;
  49         while (pdacf_reg_read(chip, PDAUDIOCF_REG_SCR) & PDAUDIOCF_AK_SBP) {
  50                 udelay(5);
  51                 if (--timeout == 0) {
  52                         spin_unlock_irqrestore(&chip->ak4117_lock, flags);
  53                         snd_printk(KERN_ERR "AK4117 read timeout (read2)\n");
  54                         return 0;
  55                 }
  56         }
  57         res = (unsigned char)pdacf_reg_read(chip, PDAUDIOCF_REG_AK_IFR);
  58         spin_unlock_irqrestore(&chip->ak4117_lock, flags);
  59         return res;
  60 }
  61
  62 static void pdacf_ak4117_write(void *private_data, unsigned char reg, unsigned char val)
  63 {
  64         struct snd_pdacf *chip = private_data;
  65         unsigned long timeout;
  66         unsigned long flags;
  67
  68         spin_lock_irqsave(&chip->ak4117_lock, flags);
  69         timeout = 1000;
  70         while (inw(chip->port + PDAUDIOCF_REG_SCR) & PDAUDIOCF_AK_SBP) {
  71                 udelay(5);
  72                 if (--timeout == 0) {
  73                         spin_unlock_irqrestore(&chip->ak4117_lock, flags);
  74                         snd_printk(KERN_ERR "AK4117 ready timeout (write)\n");
  75                         return;
  76                 }
  77         }
  78         outw((u16)reg << 8 | val | (1<<13), chip->port + PDAUDIOCF_REG_AK_IFR);
  79         spin_unlock_irqrestore(&chip->ak4117_lock, flags);
  80 }
  81
  82 #if 0
  83 void pdacf_dump(struct snd_pdacf *chip)
  84 {
  85         printk(KERN_DEBUG "PDAUDIOCF DUMP (0x%lx):\n", chip->port);
  86         printk(KERN_DEBUG "WPD         : 0x%x\n",
  87                inw(chip->port + PDAUDIOCF_REG_WDP));
  88         printk(KERN_DEBUG "RDP         : 0x%x\n",
  89                inw(chip->port + PDAUDIOCF_REG_RDP));
  90         printk(KERN_DEBUG "TCR         : 0x%x\n",
  91                inw(chip->port + PDAUDIOCF_REG_TCR));
  92         printk(KERN_DEBUG "SCR         : 0x%x\n",
  93                inw(chip->port + PDAUDIOCF_REG_SCR));
  94         printk(KERN_DEBUG "ISR         : 0x%x\n",
  95                inw(chip->port + PDAUDIOCF_REG_ISR));
  96         printk(KERN_DEBUG "IER         : 0x%x\n",
  97                inw(chip->port + PDAUDIOCF_REG_IER));
  98         printk(KERN_DEBUG "AK_IFR      : 0x%x\n",
  99                inw(chip->port + PDAUDIOCF_REG_AK_IFR));
 100 }
 101 #endif
 102
 103 static int pdacf_reset(struct snd_pdacf *chip, int powerdown)
 104 {
 105         u16 val;
 106
 107         val = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
 108         val |= PDAUDIOCF_PDN;
 109         val &= ~PDAUDIOCF_RECORD;               /* for sure */
 110         pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, val);
 111         udelay(5);
 112         val |= PDAUDIOCF_RST;
 113         pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, val);
 114         udelay(200);
 115         val &= ~PDAUDIOCF_RST;
 116         pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, val);
 117         udelay(5);
 118         if (!powerdown) {
 119                 val &= ~PDAUDIOCF_PDN;
 120                 pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, val);
 121                 udelay(200);
 122         }
 123         return 0;
 124 }
 125
 126 void pdacf_reinit(struct snd_pdacf *chip, int resume)
 127 {
 128         pdacf_reset(chip, 0);
 129         if (resume)
 130                 pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, chip->suspend_reg_scr);
 131         snd_ak4117_reinit(chip->ak4117);
 132         pdacf_reg_write(chip, PDAUDIOCF_REG_TCR, chip->regmap[PDAUDIOCF_REG_TCR>>1]);
 133         pdacf_reg_write(chip, PDAUDIOCF_REG_IER, chip->regmap[PDAUDIOCF_REG_IER>>1]);
 134 }
 135
 136 static void pdacf_proc_read(struct snd_info_entry * entry,
 137                             struct snd_info_buffer *buffer)
 138 {
 139         struct snd_pdacf *chip = entry->private_data;
 140         u16 tmp;
 141
 142         snd_iprintf(buffer, "PDAudioCF\n\n");
 143         tmp = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
 144         snd_iprintf(buffer, "FPGA revision      : 0x%x\n", PDAUDIOCF_FPGAREV(tmp));
 145
 146 }
 147
 148 static void pdacf_proc_init(struct snd_pdacf *chip)
 149 {
 150         struct snd_info_entry *entry;
 151
 152         if (! snd_card_proc_new(chip->card, "pdaudiocf", &entry))
 153                 snd_info_set_text_ops(entry, chip, pdacf_proc_read);
 154 }
 155
 156 struct snd_pdacf *snd_pdacf_create(struct snd_card *card)
 157 {
 158         struct snd_pdacf *chip;
 159
 160         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
 161         if (chip == NULL)
 162                 return NULL;
 163         chip->card = card;
 164         spin_lock_init(&chip->reg_lock);
 165         spin_lock_init(&chip->ak4117_lock);
 166         tasklet_init(&chip->tq, pdacf_tasklet, (unsigned long)chip);
 167         card->private_data = chip;
 168
 169         pdacf_proc_init(chip);
 170         return chip;
 171 }
 172
 173 static void snd_pdacf_ak4117_change(struct ak4117 *ak4117, unsigned char c0, unsigned char c1)
 174 {
 175         struct snd_pdacf *chip = ak4117->change_callback_private;
 176         unsigned long flags;
 177         u16 val;
 178
 179         if (!(c0 & AK4117_UNLCK))
 180                 return;
 181         spin_lock_irqsave(&chip->reg_lock, flags);
 182         val = chip->regmap[PDAUDIOCF_REG_SCR>>1];
 183         if (ak4117->rcs0 & AK4117_UNLCK)
 184                 val |= PDAUDIOCF_BLUE_LED_OFF;
 185         else
 186                 val &= ~PDAUDIOCF_BLUE_LED_OFF;
 187         pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, val);
 188         spin_unlock_irqrestore(&chip->reg_lock, flags);
 189 }
 190
 191 int snd_pdacf_ak4117_create(struct snd_pdacf *chip)
 192 {
 193         int err;
 194         u16 val;
 195         /* design note: if we unmask PLL unlock, parity, valid, audio or auto bit interrupts */
 196         /* from AK4117 then INT1 pin from AK4117 will be high all time, because PCMCIA interrupts are */
 197         /* egde based and FPGA does logical OR for all interrupt sources, we cannot use these */
 198         /* high-rate sources */
 199         static unsigned char pgm[5] = {
 200                 AK4117_XTL_24_576M | AK4117_EXCT,                               /* AK4117_REG_PWRDN */
 201                 AK4117_CM_PLL_XTAL | AK4117_PKCS_128fs | AK4117_XCKS_128fs,     /* AK4117_REQ_CLOCK */
 202                 AK4117_EFH_1024LRCLK | AK4117_DIF_24R | AK4117_IPS,             /* AK4117_REG_IO */
 203                 0xff,                                                           /* AK4117_REG_INT0_MASK */
 204                 AK4117_MAUTO | AK4117_MAUD | AK4117_MULK | AK4117_MPAR | AK4117_MV, /* AK4117_REG_INT1_MASK */
 205         };
 206
 207         err = pdacf_reset(chip, 0);
 208         if (err < 0)
 209                 return err;
 210         err = snd_ak4117_create(chip->card, pdacf_ak4117_read, pdacf_ak4117_write, pgm, chip, &chip->ak4117);
 211         if (err < 0)
 212                 return err;
 213
 214         val = pdacf_reg_read(chip, PDAUDIOCF_REG_TCR);
 215 #if 1 /* normal operation */
 216         val &= ~(PDAUDIOCF_ELIMAKMBIT|PDAUDIOCF_TESTDATASEL);
 217 #else /* debug */
 218         val |= PDAUDIOCF_ELIMAKMBIT;
 219         val &= ~PDAUDIOCF_TESTDATASEL;
 220 #endif
 221         pdacf_reg_write(chip, PDAUDIOCF_REG_TCR, val);
 222
 223         /* setup the FPGA to match AK4117 setup */
 224         val = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
 225         val &= ~(PDAUDIOCF_CLKDIV0 | PDAUDIOCF_CLKDIV1);                /* use 24.576Mhz clock */
 226         val &= ~(PDAUDIOCF_RED_LED_OFF|PDAUDIOCF_BLUE_LED_OFF);
 227         val |= PDAUDIOCF_DATAFMT0 | PDAUDIOCF_DATAFMT1;                 /* 24-bit data */
 228         pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, val);
 229
 230         /* setup LEDs and IRQ */
 231         val = pdacf_reg_read(chip, PDAUDIOCF_REG_IER);
 232         val &= ~(PDAUDIOCF_IRQLVLEN0 | PDAUDIOCF_IRQLVLEN1);
 233         val &= ~(PDAUDIOCF_BLUEDUTY0 | PDAUDIOCF_REDDUTY0 | PDAUDIOCF_REDDUTY1);
 234         val |= PDAUDIOCF_BLUEDUTY1 | PDAUDIOCF_HALFRATE;
 235         val |= PDAUDIOCF_IRQOVREN | PDAUDIOCF_IRQAKMEN;
 236         pdacf_reg_write(chip, PDAUDIOCF_REG_IER, val);
 237
 238         chip->ak4117->change_callback_private = chip;
 239         chip->ak4117->change_callback = snd_pdacf_ak4117_change;
 240
 241         /* update LED status */
 242         snd_pdacf_ak4117_change(chip->ak4117, AK4117_UNLCK, 0);
 243
 244         return 0;
 245 }
 246
 247 void snd_pdacf_powerdown(struct snd_pdacf *chip)
 248 {
 249         u16 val;
 250
 251         val = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
 252         chip->suspend_reg_scr = val;
 253         val |= PDAUDIOCF_RED_LED_OFF | PDAUDIOCF_BLUE_LED_OFF;
 254         pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, val);
 255         /* disable interrupts, but use direct write to preserve old register value in chip->regmap */
 256         val = inw(chip->port + PDAUDIOCF_REG_IER);
 257         val &= ~(PDAUDIOCF_IRQOVREN|PDAUDIOCF_IRQAKMEN|PDAUDIOCF_IRQLVLEN0|PDAUDIOCF_IRQLVLEN1);
 258         outw(val, chip->port + PDAUDIOCF_REG_IER);
 259         pdacf_reset(chip, 1);
 260 }
 261
 262 #ifdef CONFIG_PM
 263
 264 int snd_pdacf_suspend(struct snd_pdacf *chip, pm_message_t state)
 265 {
 266         u16 val;
 267
 268         snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
 269         snd_pcm_suspend_all(chip->pcm);
 270         /* disable interrupts, but use direct write to preserve old register value in chip->regmap */
 271         val = inw(chip->port + PDAUDIOCF_REG_IER);
 272         val &= ~(PDAUDIOCF_IRQOVREN|PDAUDIOCF_IRQAKMEN|PDAUDIOCF_IRQLVLEN0|PDAUDIOCF_IRQLVLEN1);
 273         outw(val, chip->port + PDAUDIOCF_REG_IER);
 274         chip->chip_status |= PDAUDIOCF_STAT_IS_SUSPENDED;       /* ignore interrupts from now */
 275         snd_pdacf_powerdown(chip);
 276         return 0;
 277 }
 278
 279 static inline int check_signal(struct snd_pdacf *chip)
 280 {
 281         return (chip->ak4117->rcs0 & AK4117_UNLCK) == 0;
 282 }
 283
 284 int snd_pdacf_resume(struct snd_pdacf *chip)
 285 {
 286         int timeout = 40;
 287
 288         pdacf_reinit(chip, 1);
 289         /* wait for AK4117's PLL */
 290         while (timeout-- > 0 &&
 291                (snd_ak4117_external_rate(chip->ak4117) <= 0 || !check_signal(chip)))
 292                 mdelay(1);
 293         chip->chip_status &= ~PDAUDIOCF_STAT_IS_SUSPENDED;
 294         snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
 295         return 0;
 296 }
 297 #endif