src/southbridge/intel/i82801dx/ac97.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <arch/io.h>
   4 #include <console/console.h>
   5 #include <delay.h>
   6 #include <device/device.h>
   7 #include <device/pci.h>
   8 #include <device/pci_ids.h>
   9 #include <device/pci_ops.h>
  10 #include <stdint.h>
  11
  12 #include "i82801dx.h"
  13
  14 #define NAMBAR          0x10
  15 #define   MASTER_VOL    0x02
  16 #define   PAGING        0x24
  17 #define   EXT_AUDIO     0x28
  18 #define   FUNC_SEL      0x66
  19 #define   INFO_IO       0x68
  20 #define   CONNECTOR     0x6a
  21 #define   VENDOR_ID1    0x7c
  22 #define   VENDOR_ID2    0x7e
  23 #define   SEC_VENDOR_ID1 0xfc
  24 #define   SEC_VENDOR_ID2 0xfe
  25
  26 #define NABMBAR         0x14
  27 #define   GLOB_CNT      0x2c
  28 #define   GLOB_STA      0x30
  29 #define   CAS           0x34
  30
  31 #define MMBAR           0x10
  32 #define   EXT_MODEM_ID1 0x3c
  33 #define   EXT_MODEM_ID2 0xbc
  34
  35 #define MBAR            0x14
  36 #define   SEC_CODEC     0x40
  37
  38 /* FIXME. This table is probably mainboard specific */
  39 static u16 ac97_function[16*2][4] = {
  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         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) },
  71         { (1 << 5), (2 << 11), (1 << 10), (3 << 13) }
  72 };
  73
  74 static u16 nabmbar;
  75 static u16 nambar;
  76
  77 static int ac97_semaphore(void)
  78 {
  79         int timeout;
  80         u8 reg8;
  81
  82         timeout = 0xffff;
  83         do {
  84                 reg8 = inb(nabmbar + CAS);
  85                 timeout--;
  86         } while ((reg8 & 1) && timeout);
  87         if (!timeout)
  88                 printk(BIOS_DEBUG, "Timeout!\n");
  89
  90         return (!timeout);
  91 }
  92
  93 static void init_cnr(void)
  94 {
  95         // TODO
  96 }
  97
  98 static void program_sigid(struct device *dev, u32 id)
  99 {
 100         pci_write_config32(dev, 0x2c, id);
 101 }
 102
 103 static void ac97_audio_init(struct device *dev)
 104 {
 105         u16 reg16;
 106         u32 reg32;
 107         int i;
 108
 109         printk(BIOS_DEBUG, "Initializing AC'97 Audio.\n");
 110
 111         /* top 16 bits are zero, so don't read them */
 112         nabmbar = pci_read_config16(dev, NABMBAR) & 0xfffe;
 113         nambar = pci_read_config16(dev, NAMBAR) & 0xfffe;
 114
 115         reg16 = inw(nabmbar + GLOB_CNT);
 116         reg16 |= (1 << 1); /* Remove AC_RESET# */
 117         outw(reg16, nabmbar + GLOB_CNT);
 118
 119         /* Wait 600ms. Ouch. */
 120         udelay(600 * 1000);
 121
 122         init_cnr();
 123
 124         /* Detect Primary AC'97 Codec */
 125         reg32 = inl(nabmbar + GLOB_STA);
 126         if ((reg32 & ((1 << 28) | (1 << 9) | (1 << 8))) == 0) {
 127                 /* Primary Codec not found */
 128                 printk(BIOS_DEBUG, "No primary codec. Disabling AC'97 Audio.\n");
 129                 return;
 130         }
 131
 132         ac97_semaphore();
 133
 134         /* Detect if codec is programmable */
 135         outw(0x8000, nambar + MASTER_VOL);
 136         ac97_semaphore();
 137         if (inw(nambar + MASTER_VOL) != 0x8000) {
 138                 printk(BIOS_DEBUG, "Codec not programmable. Disabling AC'97 Audio.\n");
 139                 return;
 140         }
 141
 142         /* Program Vendor IDs */
 143         reg32 = inw(nambar + VENDOR_ID1);
 144         reg32 <<= 16;
 145         reg32 |= (u16)inw(nambar + VENDOR_ID2);
 146
 147         program_sigid(dev, reg32);
 148
 149         /* Is Codec AC'97 2.3 compliant? */
 150         reg16 = inw(nambar + EXT_AUDIO);
 151         /* [11:10] = 10b -> AC'97 2.3 */
 152         if ((reg16 & 0x0c00) != 0x0800) {
 153                 /* No 2.3 Codec. We're done */
 154                 return;
 155         }
 156
 157         /* Select Page 1 */
 158         reg16 = inw(nambar + PAGING);
 159         reg16 &= 0xfff0;
 160         reg16 |= 0x0001;
 161         outw(reg16, nambar + PAGING);
 162
 163         for (i = 0x0a * 2; i > 0; i--) {
 164                 outw(i, nambar + FUNC_SEL);
 165
 166                 /* Function could not be selected. Next one */
 167                 if (inw(nambar + FUNC_SEL) != i)
 168                         continue;
 169
 170                 reg16 = inw(nambar + INFO_IO);
 171
 172                 /* Function Information present? */
 173                 if (!(reg16 & (1 << 0)))
 174                         continue;
 175
 176                 /* Function Information valid? */
 177                 if (!(reg16 & (1 << 4)))
 178                         continue;
 179
 180                 /* Program Buffer Delay [9:5] */
 181                 reg16 &= 0x03e0;
 182                 reg16 |= ac97_function[i][0];
 183
 184                 /* Program Gain [15:11] */
 185                 reg16 |= ac97_function[i][1];
 186
 187                 /* Program Inversion [10] */
 188                 reg16 |= ac97_function[i][2];
 189
 190                 outw(reg16, nambar + INFO_IO);
 191
 192                 /* Program Connector / Jack Location */
 193                 reg16 = inw(nambar + CONNECTOR);
 194                 reg16 &= 0x1fff;
 195                 reg16 |= ac97_function[i][3];
 196                 outw(reg16, nambar + CONNECTOR);
 197         }
 198 }
 199
 200 static void ac97_modem_init(struct device *dev)
 201 {
 202         u16 reg16;
 203         u32 reg32;
 204         u16 mmbar, mbar;
 205
 206         mmbar = pci_read_config16(dev, MMBAR) & 0xfffe;
 207         mbar = pci_read_config16(dev, MBAR) & 0xfffe;
 208
 209         reg16 = inw(mmbar + EXT_MODEM_ID1);
 210         if ((reg16 & 0xc000) != 0xc000) {
 211                 if (reg16 & (1 << 0)) {
 212                         reg32 = inw(mmbar + VENDOR_ID2);
 213                         reg32 <<= 16;
 214                         reg32 |= (u16)inw(mmbar + VENDOR_ID1);
 215                         program_sigid(dev, reg32);
 216                         return;
 217                 }
 218         }
 219
 220         /* Secondary codec? */
 221         reg16 = inw(mbar + SEC_CODEC);
 222         if ((reg16 & (1 << 9)) == 0)
 223                 return;
 224
 225         reg16 = inw(mmbar + EXT_MODEM_ID2);
 226         if ((reg16 & 0xc000) == 0x4000) {
 227                 if (reg16 & (1 << 0)) {
 228                         reg32 = inw(mmbar + SEC_VENDOR_ID2);
 229                         reg32 <<= 16;
 230                         reg32 |= (u16)inw(mmbar + SEC_VENDOR_ID1);
 231                         program_sigid(dev, reg32);
 232                         return;
 233                 }
 234         }
 235 }
 236
 237 static struct device_operations ac97_audio_ops  = {
 238         .read_resources   = pci_dev_read_resources,
 239         .set_resources    = pci_dev_set_resources,
 240         .enable_resources = pci_dev_enable_resources,
 241         .enable           = i82801dx_enable,
 242         .init             = ac97_audio_init,
 243 };
 244
 245 static struct device_operations ac97_modem_ops  = {
 246         .read_resources   = pci_dev_read_resources,
 247         .set_resources    = pci_dev_set_resources,
 248         .enable_resources = pci_dev_enable_resources,
 249         .enable           = i82801dx_enable,
 250         .init             = ac97_modem_init,
 251 };
 252
 253 /* 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) */
 254 static const struct pci_driver i82801db_ac97_audio __pci_driver = {
 255         .ops    = &ac97_audio_ops,
 256         .vendor = PCI_VID_INTEL,
 257         .device = PCI_DID_INTEL_82801DB_AC97_AUDIO,
 258 };
 259
 260 static const struct pci_driver i82801db_ac97_modem __pci_driver = {
 261         .ops    = &ac97_modem_ops,
 262         .vendor = PCI_VID_INTEL,
 263         .device = PCI_DID_INTEL_82801DB_AC97_MODEM,
 264 };