src/southbridge/intel/i82801gx/ac97.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <console/console.h>
   4 #include <device/device.h>
   5 #include <device/pci.h>
   6 #include <device/pci_ids.h>
   7 #include <arch/io.h>
   8 #include <device/pci_ops.h>
   9 #include <delay.h>
  10 #include "i82801gx.h"
  11
  12 #define NAMBAR          0x10
  13 #define   MASTER_VOL    0x02
  14 #define   PAGING        0x24
  15 #define   EXT_AUDIO     0x28
  16 #define   FUNC_SEL      0x66
  17 #define   INFO_IO       0x68
  18 #define   CONNECTOR     0x6a
  19 #define   VENDOR_ID1    0x7c
  20 #define   VENDOR_ID2    0x7e
  21 #define   SEC_VENDOR_ID1 0xfc
  22 #define   SEC_VENDOR_ID2 0xfe
  23
  24 #define NABMBAR         0x14
  25 #define   GLOB_CNT      0x2c
  26 #define   GLOB_STA      0x30
  27 #define   CAS           0x34
  28
  29 #define MMBAR           0x10
  30 #define   EXT_MODEM_ID1 0x3c
  31 #define   EXT_MODEM_ID2 0xbc
  32
  33 #define MBAR            0x14
  34 #define   SEC_CODEC     0x40
  35
  36 /* FIXME. This table is probably mainboard specific */
  37 static u16 ac97_function[16*2][4] = {
  38         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  39         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  40         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  41         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  42         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  43         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  44         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  45         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  46         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  47         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  48         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  49         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  50         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  51         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  52         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  53         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  54         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  55         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  56         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  57         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  58         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  59         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  60         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  61         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  62         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  63         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  64         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  65         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  66         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  67         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  68         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  69         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) }
  70 };
  71
  72 static u16 nabmbar;
  73 static u16 nambar;
  74
  75 static int ac97_semaphore(void)
  76 {
  77         int timeout;
  78         u8 reg8;
  79
  80         timeout = 0xffff;
  81         do {
  82                 reg8 = inb(nabmbar + CAS);
  83                 timeout--;
  84         } while ((reg8 & 1) && timeout);
  85         if (!timeout)
  86                 printk(BIOS_DEBUG, "Timeout!\n");
  87
  88         return (!timeout);
  89 }
  90
  91 static void init_cnr(void)
  92 {
  93         // TODO
  94 }
  95
  96 static void program_sigid(struct device *dev, u32 id)
  97 {
  98         pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID, id);
  99 }
 100
 101 static void ac97_audio_init(struct device *dev)
 102 {
 103         u16 reg16;
 104         u32 reg32;
 105         int i;
 106
 107         printk(BIOS_DEBUG, "Initializing AC'97 Audio.\n");
 108
 109         /* top 16 bits are zero, so don't read them */
 110         nabmbar = pci_read_config16(dev, NABMBAR) & 0xfffe;
 111         nambar = pci_read_config16(dev, NAMBAR) & 0xfffe;
 112
 113         reg16 = inw(nabmbar + GLOB_CNT);
 114         reg16 |= (1 << 1); /* Remove AC_RESET# */
 115         outw(reg16, nabmbar + GLOB_CNT);
 116
 117         /* Wait 600ms. Ouch. */
 118         udelay(600 * 1000);
 119
 120         init_cnr();
 121
 122         /* Detect Primary AC'97 Codec */
 123         reg32 = inl(nabmbar + GLOB_STA);
 124         if ((reg32 & ((1 << 28) | (1 << 9) | (1 << 8))) == 0) {
 125                 /* Primary Codec not found */
 126                 printk(BIOS_DEBUG, "No primary codec. Disabling AC'97 Audio.\n");
 127                 return;
 128         }
 129
 130         ac97_semaphore();
 131
 132         /* Detect if codec is programmable */
 133         outw(0x8000, nambar + MASTER_VOL);
 134         ac97_semaphore();
 135         if (inw(nambar + MASTER_VOL) != 0x8000) {
 136                 printk(BIOS_DEBUG, "Codec not programmable. Disabling AC'97 Audio.\n");
 137                 return;
 138         }
 139
 140         /* Program Vendor IDs */
 141         reg32 = inw(nambar + VENDOR_ID1);
 142         reg32 <<= 16;
 143         reg32 |= (u16)inw(nambar + VENDOR_ID2);
 144
 145         program_sigid(dev, reg32);
 146
 147         /* Is Codec AC'97 2.3 compliant? */
 148         reg16 = inw(nambar + EXT_AUDIO);
 149         /* [11:10] = 10b -> AC'97 2.3 */
 150         if ((reg16 & 0x0c00) != 0x0800) {
 151                 /* No 2.3 Codec. We're done */
 152                 return;
 153         }
 154
 155         /* Select Page 1 */
 156         reg16 = inw(nambar + PAGING);
 157         reg16 &= 0xfff0;
 158         reg16 |= 0x0001;
 159         outw(reg16, nambar + PAGING);
 160
 161         for (i = 0x0a * 2; i > 0; i--) {
 162                 outw(i, nambar + FUNC_SEL);
 163
 164                 /* Function could not be selected. Next one */
 165                 if (inw(nambar + FUNC_SEL) != i)
 166                         continue;
 167
 168                 reg16 = inw(nambar + INFO_IO);
 169
 170                 /* Function Information present? */
 171                 if (!(reg16 & (1 << 0)))
 172                         continue;
 173
 174                 /* Function Information valid? */
 175                 if (!(reg16 & (1 << 4)))
 176                         continue;
 177
 178                 /* Program Buffer Delay [9:5] */
 179                 reg16 &= 0x03e0;
 180                 reg16 |= ac97_function[i][0];
 181
 182                 /* Program Gain [15:11] */
 183                 reg16 |= ac97_function[i][1];
 184
 185                 /* Program Inversion [10] */
 186                 reg16 |= ac97_function[i][2];
 187
 188                 outw(reg16, nambar + INFO_IO);
 189
 190                 /* Program Connector / Jack Location */
 191                 reg16 = inw(nambar + CONNECTOR);
 192                 reg16 &= 0x1fff;
 193                 reg16 |= ac97_function[i][3];
 194                 outw(reg16, nambar + CONNECTOR);
 195         }
 196 }
 197
 198 static void ac97_modem_init(struct device *dev)
 199 {
 200         u16 reg16;
 201         u32 reg32;
 202         u16 mmbar, mbar;
 203
 204         mmbar = pci_read_config16(dev, MMBAR) & 0xfffe;
 205         mbar = pci_read_config16(dev, MBAR) & 0xfffe;
 206
 207         reg16 = inw(mmbar + EXT_MODEM_ID1);
 208         if ((reg16 & 0xc000) != 0xc000) {
 209                 if (reg16 & (1 << 0)) {
 210                         reg32 = inw(mmbar + VENDOR_ID2);
 211                         reg32 <<= 16;
 212                         reg32 |= (u16)inw(mmbar + VENDOR_ID1);
 213                         program_sigid(dev, reg32);
 214                         return;
 215                 }
 216         }
 217
 218         /* Secondary codec? */
 219         reg16 = inw(mbar + SEC_CODEC);
 220         if ((reg16 & (1 << 9)) == 0)
 221                 return;
 222
 223         reg16 = inw(mmbar + EXT_MODEM_ID2);
 224         if ((reg16 & 0xc000) == 0x4000) {
 225                 if (reg16 & (1 << 0)) {
 226                         reg32 = inw(mmbar + SEC_VENDOR_ID2);
 227                         reg32 <<= 16;
 228                         reg32 |= (u16)inw(mmbar + SEC_VENDOR_ID1);
 229                         program_sigid(dev, reg32);
 230                         return;
 231                 }
 232         }
 233 }
 234
 235 static struct device_operations ac97_audio_ops = {
 236         .read_resources         = pci_dev_read_resources,
 237         .set_resources          = pci_dev_set_resources,
 238         .enable_resources       = pci_dev_enable_resources,
 239         .init                   = ac97_audio_init,
 240         .enable                 = i82801gx_enable,
 241         .ops_pci                = &pci_dev_ops_pci,
 242 };
 243
 244 static struct device_operations ac97_modem_ops = {
 245         .read_resources         = pci_dev_read_resources,
 246         .set_resources          = pci_dev_set_resources,
 247         .enable_resources       = pci_dev_enable_resources,
 248         .init                   = ac97_modem_init,
 249         .enable                 = i82801gx_enable,
 250         .ops_pci                = &pci_dev_ops_pci,
 251 };
 252
 253 /* 82801GB/GR/GDH/GBM/GHM (ICH7/ICH7R/ICH7DH/ICH7-M/ICH7-M DH) */
 254 /* Note: 82801GU (ICH7-U) doesn't have AC97 audio. */
 255 static const struct pci_driver i82801gx_ac97_audio __pci_driver = {
 256         .ops    = &ac97_audio_ops,
 257         .vendor = PCI_VID_INTEL,
 258         .device = 0x27de,
 259 };
 260
 261 /* 82801GB/GR/GDH/GBM/GHM (ICH7/ICH7R/ICH7DH/ICH7-M/ICH7-M DH) */
 262 /* Note: 82801GU (ICH7-U) doesn't have AC97 modem. */
 263 static const struct pci_driver i82801gx_ac97_modem __pci_driver = {
 264         .ops    = &ac97_modem_ops,
 265         .vendor = PCI_VID_INTEL,
 266         .device = 0x27dd,
 267 };