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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 | // SPDX-License-Identifier: GPL-2.0-or-later /* * ALSA driver for ICEnsemble ICE1712 (Envy24) * * AK4524 / AK4528 / AK4529 / AK4355 / AK4381 interface * * Copyright (c) 2000 Jaroslav Kysela <perex@perex.cz> */ #include <linux/io.h> #include <linux/delay.h> #include <linux/interrupt.h> #include <linux/slab.h> #include <linux/init.h> #include <linux/module.h> #include <sound/core.h> #include <sound/initval.h> #include "ice1712.h" MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); MODULE_DESCRIPTION("ICEnsemble ICE17xx <-> AK4xxx AD/DA chip interface"); MODULE_LICENSE("GPL"); static void snd_ice1712_akm4xxx_lock(struct snd_akm4xxx *ak, int chip) { struct snd_ice1712 *ice = ak->private_data[0]; snd_ice1712_save_gpio_status(ice); } static void snd_ice1712_akm4xxx_unlock(struct snd_akm4xxx *ak, int chip) { struct snd_ice1712 *ice = ak->private_data[0]; snd_ice1712_restore_gpio_status(ice); } /* * write AK4xxx register */ static void snd_ice1712_akm4xxx_write(struct snd_akm4xxx *ak, int chip, unsigned char addr, unsigned char data) { unsigned int tmp; int idx; unsigned int addrdata; struct snd_ak4xxx_private *priv = (void *)ak->private_value[0]; struct snd_ice1712 *ice = ak->private_data[0]; if (snd_BUG_ON(chip < 0 || chip >= 4)) return; tmp = snd_ice1712_gpio_read(ice); tmp |= priv->add_flags; tmp &= ~priv->mask_flags; if (priv->cs_mask == priv->cs_addr) { if (priv->cif) { tmp |= priv->cs_mask; /* start without chip select */ } else { tmp &= ~priv->cs_mask; /* chip select low */ snd_ice1712_gpio_write(ice, tmp); udelay(1); } } else { /* doesn't handle cf=1 yet */ tmp &= ~priv->cs_mask; tmp |= priv->cs_addr; snd_ice1712_gpio_write(ice, tmp); udelay(1); } /* build I2C address + data byte */ addrdata = (priv->caddr << 6) | 0x20 | (addr & 0x1f); addrdata = (addrdata << 8) | data; for (idx = 15; idx >= 0; idx--) { /* drop clock */ tmp &= ~priv->clk_mask; snd_ice1712_gpio_write(ice, tmp); udelay(1); /* set data */ if (addrdata & (1 << idx)) tmp |= priv->data_mask; else tmp &= ~priv->data_mask; snd_ice1712_gpio_write(ice, tmp); udelay(1); /* raise clock */ tmp |= priv->clk_mask; snd_ice1712_gpio_write(ice, tmp); udelay(1); } if (priv->cs_mask == priv->cs_addr) { if (priv->cif) { /* assert a cs pulse to trigger */ tmp &= ~priv->cs_mask; snd_ice1712_gpio_write(ice, tmp); udelay(1); } tmp |= priv->cs_mask; /* chip select high to trigger */ } else { tmp &= ~priv->cs_mask; tmp |= priv->cs_none; /* deselect address */ } snd_ice1712_gpio_write(ice, tmp); udelay(1); } /* * initialize the struct snd_akm4xxx record with the template */ int snd_ice1712_akm4xxx_init(struct snd_akm4xxx *ak, const struct snd_akm4xxx *temp, const struct snd_ak4xxx_private *_priv, struct snd_ice1712 *ice) { struct snd_ak4xxx_private *priv; if (_priv != NULL) { priv = kmalloc(sizeof(*priv), GFP_KERNEL); if (priv == NULL) return -ENOMEM; *priv = *_priv; } else { priv = NULL; } *ak = *temp; ak->card = ice->card; ak->private_value[0] = (unsigned long)priv; ak->private_data[0] = ice; if (ak->ops.lock == NULL) ak->ops.lock = snd_ice1712_akm4xxx_lock; if (ak->ops.unlock == NULL) ak->ops.unlock = snd_ice1712_akm4xxx_unlock; if (ak->ops.write == NULL) ak->ops.write = snd_ice1712_akm4xxx_write; snd_akm4xxx_init(ak); return 0; } void snd_ice1712_akm4xxx_free(struct snd_ice1712 *ice) { unsigned int akidx; if (ice->akm == NULL) return; for (akidx = 0; akidx < ice->akm_codecs; akidx++) { struct snd_akm4xxx *ak = &ice->akm[akidx]; kfree((void*)ak->private_value[0]); } kfree(ice->akm); } /* * build AK4xxx controls */ int snd_ice1712_akm4xxx_build_controls(struct snd_ice1712 *ice) { unsigned int akidx; int err; for (akidx = 0; akidx < ice->akm_codecs; akidx++) { struct snd_akm4xxx *ak = &ice->akm[akidx]; err = snd_akm4xxx_build_controls(ak); if (err < 0) return err; } return 0; } EXPORT_SYMBOL(snd_ice1712_akm4xxx_init); EXPORT_SYMBOL(snd_ice1712_akm4xxx_free); EXPORT_SYMBOL(snd_ice1712_akm4xxx_build_controls); |