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1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 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Dyas (tdyas@eden.rutgers.edu) * * This is the lowlevel driver for the AMD7930 audio chip found on all * sun4c machines and some sun4m machines. * * The amd7930 is actually an ISDN chip which has a very simple * integrated audio encoder/decoder. When Sun decided on what chip to * use for audio, they had the brilliant idea of using the amd7930 and * only connecting the audio encoder/decoder pins. * * Thanks to the AMD engineer who was able to get us the AMD79C30 * databook which has all the programming information and gain tables. * * Advanced Micro Devices' Am79C30A is an ISDN/audio chip used in the * SparcStation 1+. The chip provides microphone and speaker interfaces * which provide mono-channel audio at 8K samples per second via either * 8-bit A-law or 8-bit mu-law encoding. Also, the chip features an * ISDN BRI Line Interface Unit (LIU), I.430 S/T physical interface, * which performs basic D channel LAPD processing and provides raw * B channel data. The digital audio channel, the two ISDN B channels, * and two 64 Kbps channels to the microprocessor are all interconnected * via a multiplexer. * * This driver interfaces to the Linux HiSax ISDN driver, which performs * all high-level Q.921 and Q.931 ISDN functions. The file is not * itself a hardware driver; rather it uses functions exported by * the AMD7930 driver in the sparcaudio subsystem (drivers/sbus/audio), * allowing the chip to be simultaneously used for both audio and ISDN data. * The hardware driver does _no_ buffering, but provides several callbacks * which are called during interrupt service and should therefore run quickly. * * D channel transmission is performed by passing the hardware driver the * address and size of an skb's data area, then waiting for a callback * to signal successful transmission of the packet. A task is then * queued to notify the HiSax driver that another packet may be transmitted. * * D channel reception is quite simple, mainly because of: * 1) the slow speed of the D channel - 16 kbps, and * 2) the presence of an 8- or 32-byte (depending on chip version) FIFO * to buffer the D channel data on the chip * Worst case scenario of back-to-back packets with the 8 byte buffer * at 16 kbps yields an service time of 4 ms - long enough to preclude * the need for fancy buffering. We queue a background task that copies * data out of the receive buffer into an skb, and the hardware driver * simply does nothing until we're done with the receive buffer and * reset it for a new packet. * * B channel processing is more complex, because of: * 1) the faster speed - 64 kbps, * 2) the lack of any on-chip buffering (it interrupts for every byte), and * 3) the lack of any chip support for HDLC encapsulation * * The HiSax driver can put each B channel into one of three modes - * L1_MODE_NULL (channel disabled), L1_MODE_TRANS (transparent data relay), * and L1_MODE_HDLC (HDLC encapsulation by low-level driver). * L1_MODE_HDLC is the most common, used for almost all "pure" digital * data sessions. L1_MODE_TRANS is used for ISDN audio. * * HDLC B channel transmission is performed via a large buffer into * which the skb is copied while performing HDLC bit-stuffing. A CRC * is computed and attached to the end of the buffer, which is then * passed to the low-level routines for raw transmission. Once * transmission is complete, the hardware driver is set to enter HDLC * idle by successive transmission of mark (all 1) bytes, waiting for * the ISDN driver to prepare another packet for transmission and * deliver it. * * HDLC B channel reception is performed via an X-byte ring buffer * divided into N sections of X/N bytes each. Defaults: X=256 bytes, N=4. * As the hardware driver notifies us that each section is full, we * hand it the next section and schedule a background task to peruse * the received section, bit-by-bit, with an HDLC decoder. As * packets are detected, they are copied into a large buffer while * decoding HDLC bit-stuffing. The ending CRC is verified, and if * it is correct, we alloc a new skb of the correct length (which we * now know), copy the packet into it, and hand it to the upper layers. * Optimization: for large packets, we hand the buffer (which also * happens to be an skb) directly to the upper layer after an skb_trim, * and alloc a new large buffer for future packets, thus avoiding a copy. * Then we return to HDLC processing; state is saved between calls. */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/sched.h> #include <linux/errno.h> #include <linux/interrupt.h> #include <linux/malloc.h> #include <linux/init.h> #include <linux/version.h> #include <linux/soundcard.h> #include <asm/openprom.h> #include <asm/oplib.h> #include <asm/system.h> #include <asm/irq.h> #include <asm/io.h> #include <asm/sbus.h> #include <asm/audioio.h> #include "amd7930.h" #if defined (AMD79C30_ISDN) && defined (LINUX_VERSION_CODE) && LINUX_VERSION_CODE > 0x200ff #include "../../isdn/hisax/hisax.h" #include "../../isdn/hisax/isdnl1.h" #include "../../isdn/hisax/foreign.h" #endif #define MAX_DRIVERS 1 static struct sparcaudio_driver drivers[MAX_DRIVERS]; static int num_drivers; /* Each amd7930 chip has two bi-directional B channels and a D * channel available to the uproc. This structure handles all * the buffering needed to transmit and receive via a single channel. */ #define CHANNEL_AVAILABLE 0x00 #define CHANNEL_INUSE_AUDIO_IN 0x01 #define CHANNEL_INUSE_AUDIO_OUT 0x02 #define CHANNEL_INUSE_ISDN_B1 0x04 #define CHANNEL_INUSE_ISDN_B2 0x08 #define CHANNEL_INUSE 0xff struct amd7930_channel { /* Channel status */ unsigned char channel_status; /* Current buffer that the driver is playing on channel */ volatile __u8 * output_ptr; volatile unsigned long output_count; unsigned char xmit_idle_char; /* Callback routine (and argument) when output is done on */ void (*output_callback)(void *, unsigned char); void * output_callback_arg; /* Current buffer that the driver is recording on channel */ volatile __u8 * input_ptr; volatile unsigned long input_count; volatile unsigned long input_limit; /* Callback routine (and argument) when input is done on */ void (*input_callback)(void *, unsigned char, unsigned long); void * input_callback_arg; }; /* Private information we store for each amd7930 chip. */ struct amd7930_info { struct amd7930_channel D; struct amd7930_channel Bb; struct amd7930_channel Bc; /* Pointers to which B channels are being used for what * These three fields (Baudio, Bisdn[0], and Bisdn[1]) will either * be NULL or point to one of the Bb/Bc structures above. */ struct amd7930_channel *Baudio; struct amd7930_channel *Bisdn[2]; /* Device registers information. */ struct amd7930 *regs; unsigned long regs_size; struct amd7930_map map; /* Volume information. */ int pgain, rgain, mgain; /* Device interrupt information. */ int irq; volatile int ints_on; /* Someone to signal when the ISDN LIU state changes */ int liu_state; void (*liu_callback)(void *); void *liu_callback_arg; }; /* Output a 16-bit quantity in the order that the amd7930 expects. */ #define amd7930_out16(regs,v) ({ regs->dr = v & 0xFF; regs->dr = (v >> 8) & 0xFF; }) /* * gx, gr & stg gains. this table must contain 256 elements with * the 0th being "infinity" (the magic value 9008). The remaining * elements match sun's gain curve (but with higher resolution): * -18 to 0dB in .16dB steps then 0 to 12dB in .08dB steps. */ static __const__ __u16 gx_coeff[256] = { 0x9008, 0x8b7c, 0x8b51, 0x8b45, 0x8b42, 0x8b3b, 0x8b36, 0x8b33, 0x8b32, 0x8b2a, 0x8b2b, 0x8b2c, 0x8b25, 0x8b23, 0x8b22, 0x8b22, 0x9122, 0x8b1a, 0x8aa3, 0x8aa3, 0x8b1c, 0x8aa6, 0x912d, 0x912b, 0x8aab, 0x8b12, 0x8aaa, 0x8ab2, 0x9132, 0x8ab4, 0x913c, 0x8abb, 0x9142, 0x9144, 0x9151, 0x8ad5, 0x8aeb, 0x8a79, 0x8a5a, 0x8a4a, 0x8b03, 0x91c2, 0x91bb, 0x8a3f, 0x8a33, 0x91b2, 0x9212, 0x9213, 0x8a2c, 0x921d, 0x8a23, 0x921a, 0x9222, 0x9223, 0x922d, 0x9231, 0x9234, 0x9242, 0x925b, 0x92dd, 0x92c1, 0x92b3, 0x92ab, 0x92a4, 0x92a2, 0x932b, 0x9341, 0x93d3, 0x93b2, 0x93a2, 0x943c, 0x94b2, 0x953a, 0x9653, 0x9782, 0x9e21, 0x9d23, 0x9cd2, 0x9c23, 0x9baa, 0x9bde, 0x9b33, 0x9b22, 0x9b1d, 0x9ab2, 0xa142, 0xa1e5, 0x9a3b, 0xa213, 0xa1a2, 0xa231, 0xa2eb, 0xa313, 0xa334, 0xa421, 0xa54b, 0xada4, 0xac23, 0xab3b, 0xaaab, 0xaa5c, 0xb1a3, 0xb2ca, 0xb3bd, 0xbe24, 0xbb2b, 0xba33, 0xc32b, 0xcb5a, 0xd2a2, 0xe31d, 0x0808, 0x72ba, 0x62c2, 0x5c32, 0x52db, 0x513e, 0x4cce, 0x43b2, 0x4243, 0x41b4, 0x3b12, 0x3bc3, 0x3df2, 0x34bd, 0x3334, 0x32c2, 0x3224, 0x31aa, 0x2a7b, 0x2aaa, 0x2b23, 0x2bba, 0x2c42, 0x2e23, 0x25bb, 0x242b, 0x240f, 0x231a, 0x22bb, 0x2241, 0x2223, 0x221f, 0x1a33, 0x1a4a, 0x1acd, 0x2132, 0x1b1b, 0x1b2c, 0x1b62, 0x1c12, 0x1c32, 0x1d1b, 0x1e71, 0x16b1, 0x1522, 0x1434, 0x1412, 0x1352, 0x1323, 0x1315, 0x12bc, 0x127a, 0x1235, 0x1226, 0x11a2, 0x1216, 0x0a2a, 0x11bc, 0x11d1, 0x1163, 0x0ac2, 0x0ab2, 0x0aab, 0x0b1b, 0x0b23, 0x0b33, 0x0c0f, 0x0bb3, 0x0c1b, 0x0c3e, 0x0cb1, 0x0d4c, 0x0ec1, 0x079a, 0x0614, 0x0521, 0x047c, 0x0422, 0x03b1, 0x03e3, 0x0333, 0x0322, 0x031c, 0x02aa, 0x02ba, 0x02f2, 0x0242, 0x0232, 0x0227, 0x0222, 0x021b, 0x01ad, 0x0212, 0x01b2, 0x01bb, 0x01cb, 0x01f6, 0x0152, 0x013a, 0x0133, 0x0131, 0x012c, 0x0123, 0x0122, 0x00a2, 0x011b, 0x011e, 0x0114, 0x00b1, 0x00aa, 0x00b3, 0x00bd, 0x00ba, 0x00c5, 0x00d3, 0x00f3, 0x0062, 0x0051, 0x0042, 0x003b, 0x0033, 0x0032, 0x002a, 0x002c, 0x0025, 0x0023, 0x0022, 0x001a, 0x0021, 0x001b, 0x001b, 0x001d, 0x0015, 0x0013, 0x0013, 0x0012, 0x0012, 0x000a, 0x000a, 0x0011, 0x0011, 0x000b, 0x000b, 0x000c, 0x000e, }; static __const__ __u16 ger_coeff[] = { 0x431f, /* 5. dB */ 0x331f, /* 5.5 dB */ 0x40dd, /* 6. dB */ 0x11dd, /* 6.5 dB */ 0x440f, /* 7. dB */ 0x411f, /* 7.5 dB */ 0x311f, /* 8. dB */ 0x5520, /* 8.5 dB */ 0x10dd, /* 9. dB */ 0x4211, /* 9.5 dB */ 0x410f, /* 10. dB */ 0x111f, /* 10.5 dB */ 0x600b, /* 11. dB */ 0x00dd, /* 11.5 dB */ 0x4210, /* 12. dB */ 0x110f, /* 13. dB */ 0x7200, /* 14. dB */ 0x2110, /* 15. dB */ 0x2200, /* 15.9 dB */ 0x000b, /* 16.9 dB */ 0x000f /* 18. dB */ }; #define NR_GER_COEFFS (sizeof(ger_coeff) / sizeof(ger_coeff[0])) /* Enable amd7930 interrupts atomically. */ static __inline__ void amd7930_enable_ints(struct amd7930_info *info) { register unsigned long flags; if (info->ints_on) return; save_and_cli(flags); info->regs->cr = AMR_INIT; info->regs->dr = AM_INIT_ACTIVE; restore_flags(flags); info->ints_on = 1; } /* Disable amd7930 interrupts atomically. */ static __inline__ void amd7930_disable_ints(struct amd7930_info *info) { register unsigned long flags; if (!info->ints_on) return; save_and_cli(flags); info->regs->cr = AMR_INIT; info->regs->dr = AM_INIT_ACTIVE | AM_INIT_DISABLE_INTS; restore_flags(flags); info->ints_on = 0; } /* Idle amd7930 (no interrupts, no audio, no data) */ static __inline__ void amd7930_idle(struct amd7930_info *info) { register unsigned long flags; if (!info->ints_on) return; save_and_cli(flags); info->regs->cr = AMR_INIT; info->regs->dr = 0; restore_flags(flags); info->ints_on = 0; } /* Commit the local copy of the MAP registers to the amd7930. */ static void amd7930_write_map(struct sparcaudio_driver *drv) { struct amd7930_info *info = (struct amd7930_info *)drv->private; struct amd7930 *regs = info->regs; struct amd7930_map *map = &info->map; unsigned long flags; save_and_cli(flags); regs->cr = AMR_MAP_GX; amd7930_out16(regs, map->gx); regs->cr = AMR_MAP_GR; amd7930_out16(regs, map->gr); regs->cr = AMR_MAP_STGR; amd7930_out16(regs, map->stgr); regs->cr = AMR_MAP_GER; amd7930_out16(regs, map->ger); regs->cr = AMR_MAP_MMR1; regs->dr = map->mmr1; regs->cr = AMR_MAP_MMR2; regs->dr = map->mmr2; restore_flags(flags); } /* Update the MAP registers with new settings. */ static void amd7930_update_map(struct sparcaudio_driver *drv) { struct amd7930_info *info = (struct amd7930_info *)drv->private; struct amd7930_map *map = &info->map; int level; map->gx = gx_coeff[info->rgain]; map->stgr = gx_coeff[info->mgain]; level = (info->pgain * (256 + NR_GER_COEFFS)) >> 8; if (level >= 256) { map->ger = ger_coeff[level - 256]; map->gr = gx_coeff[255]; } else { map->ger = ger_coeff[0]; map->gr = gx_coeff[level]; } amd7930_write_map(drv); } /* Bit of a hack here - if the HISAX ISDN driver has got INTSTAT debugging * turned on, we send debugging characters to the ISDN driver: * * i# - Interrupt received - number from 0 to 7 is low three bits of IR * > - Loaded a single char into the Dchan xmit FIFO * + - Finished loading an xmit packet into the Dchan xmit FIFO * < - Read a single char from the Dchan recv FIFO * ! - Finished reading a packet from the Dchan recv FIFO * * This code needs to be removed if anything other than HISAX uses the ISDN * driver, since D.output_callback_arg is assumed to be a certain struct ptr */ #ifdef L2FRAME_DEBUG inline void debug_info(struct amd7930_info *info, char c) { struct IsdnCardState *cs; if (!info || !info->D.output_callback_arg) return; cs = (struct IsdnCardState *)info->D.output_callback_arg; if (!cs || !cs->status_write) return; if (cs->debug & L1_DEB_INTSTAT) { *(cs->status_write++) = c; if (cs->status_write > cs->status_end) cs->status_write = cs->status_buf; } } #else #define debug_info(info,c) #endif static void fill_D_xmit_fifo(struct amd7930_info *info) { /* Send next byte(s) of outgoing data. */ while (info->D.output_ptr && info->D.output_count > 0 && (info->regs->dsr2 & AMR_DSR2_TBE)) { /* Send the next byte and advance buffer pointer. */ info->regs->dctb = *(info->D.output_ptr); info->D.output_ptr++; info->D.output_count--; debug_info(info, '>'); } } static void transceive_Dchannel(struct amd7930_info *info) { __u8 dummy; #define D_XMIT_ERRORS (AMR_DER_COLLISION | AMR_DER_UNRN) #define D_RECV_ERRORS (AMR_DER_RABRT | AMR_DER_RFRAME | AMR_DER_FCS | \ AMR_DER_OVFL | AMR_DER_UNFL | AMR_DER_OVRN) /* Transmit if we can */ fill_D_xmit_fifo(info); /* Done with the xmit buffer? Notify the midlevel driver. */ if (info->D.output_ptr != NULL && info->D.output_count == 0) { info->D.output_ptr = NULL; info->D.output_count = 0; debug_info(info, '+'); if (info->D.output_callback) (*info->D.output_callback) (info->D.output_callback_arg, info->regs->der); /* info->regs->der & D_XMIT_ERRORS); */ } /* Read the next byte(s) of incoming data. */ while (info->regs->dsr2 & AMR_DSR2_RBA) { if (info->D.input_ptr && (info->D.input_count < info->D.input_limit)) { /* Get the next byte and advance buffer pointer. */ *(info->D.input_ptr) = info->regs->dcrb; info->D.input_ptr++; info->D.input_count++; } else { /* Overflow - should be detected by chip via RBLR * so we'll just consume data until we see LBRP */ dummy = info->regs->dcrb; } debug_info(info, '<'); if (info->regs->dsr2 & AMR_DSR2_LBRP) { /* End of recv packet? Notify the midlevel driver. */ __u8 der; debug_info(info, '!'); info->D.input_ptr = NULL; der = info->regs->der & D_RECV_ERRORS; /* Read receive byte count - advances FIFOs */ info->regs->cr = AMR_DLC_DRCR; dummy = info->regs->dr; dummy = info->regs->dr; if (info->D.input_callback) (*info->D.input_callback) (info->D.input_callback_arg, der, info->D.input_count); } } } long amd7930_xmit_idles=0; static void transceive_Bchannel(struct amd7930_channel *channel, __volatile__ __u8 *io_reg) { /* Send the next byte of outgoing data. */ if (channel->output_ptr && channel->output_count > 0) { /* Send the next byte and advance buffer pointer. */ *io_reg = *(channel->output_ptr); channel->output_ptr++; channel->output_count--; /* Done with the buffer? Notify the midlevel driver. */ if (channel->output_count == 0) { channel->output_ptr = NULL; channel->output_count = 0; if (channel->output_callback) (*channel->output_callback) (channel->output_callback_arg,1); } } else { *io_reg = channel->xmit_idle_char; amd7930_xmit_idles++; } /* Read the next byte of incoming data. */ if (channel->input_ptr && channel->input_count > 0) { /* Get the next byte and advance buffer pointer. */ *(channel->input_ptr) = *io_reg; channel->input_ptr++; channel->input_count--; /* Done with the buffer? Notify the midlevel driver. */ if (channel->input_count == 0) { channel->input_ptr = NULL; channel->input_count = 0; if (channel->input_callback) (*channel->input_callback) (channel->input_callback_arg, 1, 0); } } } /* Interrupt handler (The chip takes only one byte per interrupt. Grrr!) */ static void amd7930_interrupt(int irq, void *dev_id, struct pt_regs *intr_regs) { struct sparcaudio_driver *drv = (struct sparcaudio_driver *)dev_id; struct amd7930_info *info = (struct amd7930_info *)drv->private; struct amd7930 *regs = info->regs; __u8 ir; __u8 lsr; /* Clear the interrupt. */ ir = regs->ir; if (ir & AMR_IR_BBUF) { if (info->Bb.channel_status == CHANNEL_INUSE) transceive_Bchannel(&info->Bb, &info->regs->bbtb); if (info->Bc.channel_status == CHANNEL_INUSE) transceive_Bchannel(&info->Bc, &info->regs->bctb); } if (ir & (AMR_IR_DRTHRSH | AMR_IR_DTTHRSH | AMR_IR_DSRI)) { debug_info(info, 'i'); debug_info(info, '0' + (ir&7)); transceive_Dchannel(info); } if (ir & AMR_IR_LSRI) { regs->cr = AMR_LIU_LSR; lsr = regs->dr; info->liu_state = (lsr&0x7) + 2; if (info->liu_callback) (*info->liu_callback)(info->liu_callback_arg); } } static int amd7930_open(struct inode * inode, struct file * file, struct sparcaudio_driver *drv) { MOD_INC_USE_COUNT; return 0; } static void amd7930_release(struct inode * inode, struct file * file, struct sparcaudio_driver *drv) { /* amd7930_disable_ints(drv->private); */ MOD_DEC_USE_COUNT; } static void request_Baudio(struct amd7930_info *info) { if (info->Bb.channel_status == CHANNEL_AVAILABLE) { info->Bb.channel_status = CHANNEL_INUSE; info->Baudio = &info->Bb; /* Multiplexor map - audio (Ba) to Bb */ info->regs->cr = AMR_MUX_MCR1; info->regs->dr = AM_MUX_CHANNEL_Ba | (AM_MUX_CHANNEL_Bb << 4); /* Enable B channel interrupts */ info->regs->cr = AMR_MUX_MCR4; info->regs->dr = AM_MUX_MCR4_ENABLE_INTS; } else if (info->Bc.channel_status == CHANNEL_AVAILABLE) { info->Bc.channel_status = CHANNEL_INUSE; info->Baudio = &info->Bc; /* Multiplexor map - audio (Ba) to Bc */ info->regs->cr = AMR_MUX_MCR1; info->regs->dr = AM_MUX_CHANNEL_Ba | (AM_MUX_CHANNEL_Bc << 4); /* Enable B channel interrupts */ info->regs->cr = AMR_MUX_MCR4; info->regs->dr = AM_MUX_MCR4_ENABLE_INTS; } } static void release_Baudio(struct amd7930_info *info) { if (info->Baudio) { info->Baudio->channel_status = CHANNEL_AVAILABLE; info->regs->cr = AMR_MUX_MCR1; info->regs->dr = 0; info->Baudio = NULL; if (info->Bb.channel_status == CHANNEL_AVAILABLE && info->Bc.channel_status == CHANNEL_AVAILABLE) { /* Disable B channel interrupts */ info->regs->cr = AMR_MUX_MCR4; info->regs->dr = 0; } } } static void amd7930_start_output(struct sparcaudio_driver *drv, __u8 * buffer, unsigned long count) { struct amd7930_info *info = (struct amd7930_info *)drv->private; if (! info->Baudio) { request_Baudio(info); } if (info->Baudio) { info->Baudio->output_ptr = buffer; info->Baudio->output_count = count; info->Baudio->output_callback = (void *) &sparcaudio_output_done; info->Baudio->output_callback_arg = (void *) drv; info->Baudio->xmit_idle_char = 0; } } static void amd7930_stop_output(struct sparcaudio_driver *drv) { struct amd7930_info *info = (struct amd7930_info *)drv->private; if (info->Baudio) { info->Baudio->output_ptr = NULL; info->Baudio->output_count = 0; if (! info->Baudio->input_ptr) release_Baudio(info); } } static void amd7930_start_input(struct sparcaudio_driver *drv, __u8 * buffer, unsigned long count) { struct amd7930_info *info = (struct amd7930_info *)drv->private; if (! info->Baudio) { request_Baudio(info); } if (info->Baudio) { info->Baudio->input_ptr = buffer; info->Baudio->input_count = count; info->Baudio->input_callback = (void *) &sparcaudio_input_done; info->Baudio->input_callback_arg = (void *) drv; } } static void amd7930_stop_input(struct sparcaudio_driver *drv) { struct amd7930_info *info = (struct amd7930_info *)drv->private; if (info->Baudio) { info->Baudio->input_ptr = NULL; info->Baudio->input_count = 0; if (! info->Baudio->output_ptr) release_Baudio(info); } } static void amd7930_sunaudio_getdev(struct sparcaudio_driver *drv, audio_device_t * audinfo) { strncpy(audinfo->name, "SUNW,am79c30", sizeof(audinfo->name) - 1); strncpy(audinfo->version, "a", sizeof(audinfo->version) - 1); strncpy(audinfo->config, "onboard1", sizeof(audinfo->config) - 1); } static int amd7930_sunaudio_getdev_sunos(struct sparcaudio_driver *drv) { return AUDIO_DEV_AMD; } static int amd7930_get_formats(struct sparcaudio_driver *drv) { return (AFMT_MU_LAW | AFMT_A_LAW); } static int amd7930_get_output_ports(struct sparcaudio_driver *drv) { return (AUDIO_SPEAKER | AUDIO_HEADPHONE); } static int amd7930_get_input_ports(struct sparcaudio_driver *drv) { return (AUDIO_MICROPHONE); } static int amd7930_set_output_volume(struct sparcaudio_driver *drv, int vol) { struct amd7930_info *info = (struct amd7930_info *)drv->private; info->pgain = vol; amd7930_update_map(drv); return 0; } static int amd7930_get_output_volume(struct sparcaudio_driver *drv) { struct amd7930_info *info = (struct amd7930_info *)drv->private; return info->pgain; } static int amd7930_set_input_volume(struct sparcaudio_driver *drv, int vol) { struct amd7930_info *info = (struct amd7930_info *)drv->private; info->rgain = vol; amd7930_update_map(drv); return 0; } static int amd7930_get_input_volume(struct sparcaudio_driver *drv) { struct amd7930_info *info = (struct amd7930_info *)drv->private; return info->rgain; } static int amd7930_set_monitor_volume(struct sparcaudio_driver *drv, int vol) { struct amd7930_info *info = (struct amd7930_info *)drv->private; info->mgain = vol; amd7930_update_map(drv); return 0; } static int amd7930_get_monitor_volume(struct sparcaudio_driver *drv) { struct amd7930_info *info = (struct amd7930_info *)drv->private; return info->mgain; } /* Cheats. The amd has the minimum capabilities we support */ static int amd7930_get_output_balance(struct sparcaudio_driver *drv) { return AUDIO_MID_BALANCE; } static int amd7930_get_input_balance(struct sparcaudio_driver *drv) { return AUDIO_MID_BALANCE; } static int amd7930_get_output_channels(struct sparcaudio_driver *drv) { return AUDIO_MIN_PLAY_CHANNELS; } static int amd7930_set_output_channels(struct sparcaudio_driver *drv, int value) { return (value == AUDIO_MIN_PLAY_CHANNELS) ? 0 : -EINVAL; } static int amd7930_get_input_channels(struct sparcaudio_driver *drv) { return AUDIO_MIN_REC_CHANNELS; } static int amd7930_set_input_channels(struct sparcaudio_driver *drv, int value) { return (value == AUDIO_MIN_REC_CHANNELS) ? 0 : -EINVAL; } static int amd7930_get_output_precision(struct sparcaudio_driver *drv) { return AUDIO_MIN_PLAY_PRECISION; } static int amd7930_set_output_precision(struct sparcaudio_driver *drv, int value) { return (value == AUDIO_MIN_PLAY_PRECISION) ? 0 : -EINVAL; } static int amd7930_get_input_precision(struct sparcaudio_driver *drv) { return AUDIO_MIN_REC_PRECISION; } static int amd7930_set_input_precision(struct sparcaudio_driver *drv, int value) { return (value == AUDIO_MIN_REC_PRECISION) ? 0 : -EINVAL; } static int amd7930_get_output_port(struct sparcaudio_driver *drv) { struct amd7930_info *info = (struct amd7930_info *)drv->private; if (info->map.mmr2 & AM_MAP_MMR2_LS) return AUDIO_SPEAKER; return AUDIO_HEADPHONE; } static int amd7930_set_output_port(struct sparcaudio_driver *drv, int value) { struct amd7930_info *info = (struct amd7930_info *)drv->private; switch (value) { case AUDIO_HEADPHONE: info->map.mmr2 &= ~AM_MAP_MMR2_LS; break; case AUDIO_SPEAKER: info->map.mmr2 |= AM_MAP_MMR2_LS; break; default: return -EINVAL; } amd7930_update_map(drv); return 0; } /* Only a microphone here, so no troubles */ static int amd7930_get_input_port(struct sparcaudio_driver *drv) { return AUDIO_MICROPHONE; } static int amd7930_get_encoding(struct sparcaudio_driver *drv) { struct amd7930_info *info = (struct amd7930_info *)drv->private; if (info->map.mmr1 & AM_MAP_MMR1_ALAW) return AUDIO_ENCODING_ALAW; return AUDIO_ENCODING_ULAW; } static int amd7930_set_encoding(struct sparcaudio_driver *drv, int value) { struct amd7930_info *info = (struct amd7930_info *)drv->private; switch (value) { case AUDIO_ENCODING_ULAW: info->map.mmr1 &= ~AM_MAP_MMR1_ALAW; break; case AUDIO_ENCODING_ALAW: info->map.mmr1 |= AM_MAP_MMR1_ALAW; break; default: return -EINVAL; } amd7930_update_map(drv); return 0; } /* This is what you get. Take it or leave it */ static int amd7930_get_output_rate(struct sparcaudio_driver *drv) { return AMD7930_RATE; } static int amd7930_set_output_rate(struct sparcaudio_driver *drv, int value) { return (value == AMD7930_RATE) ? 0 : -EINVAL; } static int amd7930_get_input_rate(struct sparcaudio_driver *drv) { return AMD7930_RATE; } static int amd7930_set_input_rate(struct sparcaudio_driver *drv, int value) { return (value == AMD7930_RATE) ? 0 : -EINVAL; } static int amd7930_get_output_muted(struct sparcaudio_driver *drv) { return 0; } static void amd7930_loopback(struct sparcaudio_driver *drv, unsigned int value) { struct amd7930_info *info = (struct amd7930_info *)drv->private; if (value) info->map.mmr1 |= AM_MAP_MMR1_LOOPBACK; else info->map.mmr1 &= ~AM_MAP_MMR1_LOOPBACK; amd7930_update_map(drv); return; } static int amd7930_ioctl(struct inode * inode, struct file * file, unsigned int cmd, unsigned long arg, struct sparcaudio_driver *drv) { int retval = 0; switch (cmd) { case AUDIO_DIAG_LOOPBACK: amd7930_loopback(drv, (unsigned int)arg); break; default: retval = -EINVAL; } return retval; } /* * ISDN operations * * Many of these routines take an "int dev" argument, which is simply * an index into the drivers[] array. Currently, we only support a * single AMD 7930 chip, so the value should always be 0. B channel * operations require an "int chan", which should be 0 for channel B1 * and 1 for channel B2 * * int amd7930_get_irqnum(int dev) * * returns the interrupt number being used by the chip. ISDN4linux * uses this number to watch the interrupt during initialization and * make sure something is happening. * * int amd7930_get_liu_state(int dev) * * returns the current state of the ISDN Line Interface Unit (LIU) * as a number between 2 (state F2) and 7 (state F7). 0 may also be * returned if the chip doesn't exist or the LIU hasn't been * activated. The meanings of the states are defined in I.430, ISDN * BRI Physical Layer Interface. The most important two states are * F3 (shutdown) and F7 (syncronized). * * void amd7930_liu_init(int dev, void (*callback)(), void *callback_arg) * * initializes the LIU and optionally registers a callback to be * signaled upon a change of LIU state. The callback will be called * with a single opaque callback_arg Once the callback has been * triggered, amd7930_get_liu_state can be used to determine the LIU * current state. * * void amd7930_liu_activate(int dev, int priority) * * requests LIU activation at a given D-channel priority. * Successful activatation is achieved upon entering state F7, which * will trigger any callback previously registered with * amd7930_liu_init. * * void amd7930_liu_deactivate(int dev) * * deactivates LIU. Outstanding D and B channel transactions are * terminated rudely and without callback notification. LIU change * of state callback will be triggered, however. * * void amd7930_dxmit(int dev, __u8 *buffer, unsigned int count, * void (*callback)(void *, int), void *callback_arg) * * transmits a packet - specified with buffer, count - over the D-channel * interface. Buffer should begin with the LAPD address field and * end with the information field. FCS and flag sequences should not * be included, nor is bit-stuffing required - all these functions are * performed by the chip. The callback function will be called * DURING THE TOP HALF OF AN INTERRUPT HANDLER and will be passed * both the arbitrary callback_arg and an integer error indication: * * 0 - successful transmission; ready for next packet * non-0 - error value from chip's DER (D-Channel Error Register): * 4 - collision detect * 128 - underrun; irq routine didn't service chip fast enough * * The callback routine should defer any time-consuming operations * to a bottom-half handler; however, amd7930_dxmit may be called * from within the callback to request back-to-back transmission of * a second packet (without repeating the priority/collision mechanism) * * A comment about the "collision detect" error, which is signalled * whenever the echoed D-channel data didn't match the transmitted * data. This is part of ISDN's normal multi-drop T-interface * operation, indicating that another device has attempted simultaneous * transmission, but can also result from line noise. An immediate * requeue via amd7930_dxmit is suggested, but repeated collision * errors may indicate a more serious problem. * * void amd7930_drecv(int dev, __u8 *buffer, unsigned int size, * void (*callback)(void *, int, unsigned int), * void *callback_arg) * * register a buffer - buffer, size - into which a D-channel packet * can be received. The callback function will be called DURING * THE TOP HALF OF AN INTERRUPT HANDLER and will be passed an * arbitrary callback_arg, an integer error indication and the length * of the received packet, which will start with the address field, * end with the information field, and not contain flag or FCS * bytes. Bit-stuffing will already have been corrected for. * Possible values of second callback argument "error": * * 0 - successful reception * non-0 - error value from chip's DER (D-Channel Error Register): * 1 - received packet abort * 2 - framing error; non-integer number of bytes received * 8 - FCS error; CRC sequence indicated corrupted data * 16 - overflow error; packet exceeded size of buffer * 32 - underflow error; packet smaller than required five bytes * 64 - overrun error; irq routine didn't service chip fast enough * * int amd7930_bopen(int dev, int chan, u_char xmit_idle_char) * * This function should be called before any other operations on a B * channel. In addition to arranging for interrupt handling and * channel multiplexing, it sets the xmit_idle_char which is * transmitted on the interface when no data buffer is available. * Suggested values are: 0 for ISDN audio; FF for HDLC mark idle; 7E * for HDLC flag idle. Returns 0 on a successful open; -1 on error, * which is quite possible if audio and the other ISDN channel are * already in use, since the Am7930 can only send two of the three * channels to the processor * * void amd7930_bclose(int dev, int chan) * * Shuts down a B channel when no longer in use. * * void amd7930_bxmit(int dev, int chan, __u8 *buffer, unsigned int count, * void (*callback)(void *), void *callback_arg) * * transmits a raw data block - specified with buffer, count - over * the B channel interface specified by dev/chan. The callback * function will be called DURING THE TOP HALF OF AN INTERRUPT * HANDLER and will be passed the arbitrary callback_arg * * The callback routine should defer any time-consuming operations * to a bottom-half handler; however, amd7930_bxmit may be called * from within the callback to request back-to-back transmission of * another data block * * void amd7930_brecv(int dev, int chan, __u8 *buffer, unsigned int size, * void (*callback)(void *), void *callback_arg) * * receive a raw data block - specified with buffer, size - over the * B channel interface specified by dev/chan. The callback function * will be called DURING THE TOP HALF OF AN INTERRUPT HANDLER and * will be passed the arbitrary callback_arg * * The callback routine should defer any time-consuming operations * to a bottom-half handler; however, amd7930_brecv may be called * from within the callback to register another buffer and ensure * continuous B channel reception without loss of data * */ #if defined (AMD79C30_ISDN) && defined (LINUX_VERSION_CODE) && LINUX_VERSION_CODE > 0x200ff static int amd7930_get_irqnum(int dev) { struct amd7930_info *info; if (dev > num_drivers) { return(0); } info = (struct amd7930_info *) drivers[dev].private; return info->irq; } static int amd7930_get_liu_state(int dev) { struct amd7930_info *info; if (dev > num_drivers) { return(0); } info = (struct amd7930_info *) drivers[dev].private; return info->liu_state; } static void amd7930_liu_init(int dev, void (*callback)(), void *callback_arg) { struct amd7930_info *info; register unsigned long flags; if (dev > num_drivers) { return; } info = (struct amd7930_info *) drivers[dev].private; save_and_cli(flags); /* Set callback for LIU state change */ info->liu_callback = callback; info->liu_callback_arg = callback_arg; /* De-activate the ISDN Line Interface Unit (LIU) */ info->regs->cr = AMR_LIU_LMR1; info->regs->dr = 0; /* Request interrupt when LIU changes state from/to F3/F7/F8 */ info->regs->cr = AMR_LIU_LMR2; info->regs->dr = AM_LIU_LMR2_EN_F3_INT | AM_LIU_LMR2_EN_F7_INT | AM_LIU_LMR2_EN_F8_INT; /* amd7930_enable_ints(info); */ /* Activate the ISDN Line Interface Unit (LIU) */ info->regs->cr = AMR_LIU_LMR1; info->regs->dr = AM_LIU_LMR1_LIU_ENABL; restore_flags(flags); } static void amd7930_liu_activate(int dev, int priority) { struct amd7930_info *info; register unsigned long flags; if (dev > num_drivers) { return; } info = (struct amd7930_info *) drivers[dev].private; save_and_cli(flags); /* Set D-channel access priority * * I.430 defines a priority mechanism based on counting 1s * in the echo channel before transmitting * * Priority 0 is eight 1s; priority 1 is ten 1s; etc */ info->regs->cr = AMR_LIU_LPR; info->regs->dr = priority & 0x0f; /* request LIU activation */ info->regs->cr = AMR_LIU_LMR1; info->regs->dr = AM_LIU_LMR1_LIU_ENABL | AM_LIU_LMR1_REQ_ACTIV; restore_flags(flags); } static void amd7930_liu_deactivate(int dev) { struct amd7930_info *info; register unsigned long flags; if (dev > num_drivers) { return; } info = (struct amd7930_info *) drivers[dev].private; save_and_cli(flags); /* deactivate LIU */ info->regs->cr = AMR_LIU_LMR1; info->regs->dr = 0; restore_flags(flags); } static void amd7930_dxmit(int dev, __u8 *buffer, unsigned int count, void (*callback)(void *, int), void *callback_arg) { struct amd7930_info *info; register unsigned long flags; __u8 dmr1; if (dev > num_drivers) { return; } info = (struct amd7930_info *) drivers[dev].private; save_and_cli(flags); if (info->D.output_ptr) { restore_flags(flags); printk("amd7930_dxmit: transmitter in use\n"); return; } info->D.output_ptr = buffer; info->D.output_count = count; info->D.output_callback = callback; info->D.output_callback_arg = callback_arg; /* Enable D-channel Transmit Threshold interrupt; disable addressing */ info->regs->cr = AMR_DLC_DMR1; dmr1 = info->regs->dr; dmr1 |= AMR_DLC_DMR1_DTTHRSH_INT; dmr1 &= ~AMR_DLC_DMR1_EN_ADDRS; info->regs->dr = dmr1; /* Begin xmit by setting D-channel Transmit Byte Count Reg (DTCR) */ info->regs->cr = AMR_DLC_DTCR; info->regs->dr = count & 0xff; info->regs->dr = (count >> 8) & 0xff; /* Prime xmit FIFO */ /* fill_D_xmit_fifo(info); */ transceive_Dchannel(info); restore_flags(flags); } static void amd7930_drecv(int dev, __u8 *buffer, unsigned int size, void (*callback)(void *, int, unsigned int), void *callback_arg) { struct amd7930_info *info; register unsigned long flags; __u8 dmr1; if (dev > num_drivers) { return; } info = (struct amd7930_info *) drivers[dev].private; save_and_cli(flags); if (info->D.input_ptr) { restore_flags(flags); printk("amd7930_drecv: receiver already has buffer!\n"); return; } info->D.input_ptr = buffer; info->D.input_count = 0; info->D.input_limit = size; info->D.input_callback = callback; info->D.input_callback_arg = callback_arg; /* Enable D-channel Receive Threshold interrupt; * Enable D-channel End of Receive Packet interrupt; * Disable address recognition */ info->regs->cr = AMR_DLC_DMR1; dmr1 = info->regs->dr; dmr1 |= AMR_DLC_DMR1_DRTHRSH_INT | AMR_DLC_DMR1_EORP_INT; dmr1 &= ~AMR_DLC_DMR1_EN_ADDRS; info->regs->dr = dmr1; /* Set D-channel Receive Byte Count Limit Register */ info->regs->cr = AMR_DLC_DRCR; info->regs->dr = size & 0xff; info->regs->dr = (size >> 8) & 0xff; restore_flags(flags); } static int amd7930_bopen(int dev, unsigned int chan, int mode, u_char xmit_idle_char) { struct amd7930_info *info; register unsigned long flags; if (dev > num_drivers || chan<0 || chan>1) { return -1; } if (mode == L1_MODE_HDLC) { return -1; } info = (struct amd7930_info *) drivers[dev].private; save_and_cli(flags); if (info->Bb.channel_status == CHANNEL_AVAILABLE) { info->Bb.channel_status = CHANNEL_INUSE; info->Bb.xmit_idle_char = xmit_idle_char; info->Bisdn[chan] = &info->Bb; /* Multiplexor map - isdn (B1/2) to Bb */ info->regs->cr = AMR_MUX_MCR2 + chan; info->regs->dr = (AM_MUX_CHANNEL_B1 + chan) | (AM_MUX_CHANNEL_Bb << 4); } else if (info->Bc.channel_status == CHANNEL_AVAILABLE) { info->Bc.channel_status = CHANNEL_INUSE; info->Bc.xmit_idle_char = xmit_idle_char; info->Bisdn[chan] = &info->Bc; /* Multiplexor map - isdn (B1/2) to Bc */ info->regs->cr = AMR_MUX_MCR2 + chan; info->regs->dr = (AM_MUX_CHANNEL_B1 + chan) | (AM_MUX_CHANNEL_Bc << 4); } else { restore_flags(flags); return (-1); } /* Enable B channel transmit */ info->regs->cr = AMR_LIU_LMR1; info->regs->dr |= AM_LIU_LMR1_B1_ENABL + chan; /* Enable B channel interrupts */ info->regs->cr = AMR_MUX_MCR4; info->regs->dr = AM_MUX_MCR4_ENABLE_INTS | AM_MUX_MCR4_REVERSE_Bb | AM_MUX_MCR4_REVERSE_Bc; restore_flags(flags); return 0; } static void amd7930_bclose(int dev, unsigned int chan) { struct amd7930_info *info; register unsigned long flags; if (dev > num_drivers || chan<0 || chan>1) { return; } info = (struct amd7930_info *) drivers[dev].private; save_and_cli(flags); if (info->Bisdn[chan]) { info->Bisdn[chan]->channel_status = CHANNEL_AVAILABLE; info->regs->cr = AMR_MUX_MCR2 + chan; info->regs->dr = 0; info->Bisdn[chan] = NULL; /* Disable B channel transmit */ info->regs->cr = AMR_LIU_LMR1; info->regs->dr &= ~(AM_LIU_LMR1_B1_ENABL + chan); if (info->Bb.channel_status == CHANNEL_AVAILABLE && info->Bc.channel_status == CHANNEL_AVAILABLE) { /* Disable B channel interrupts */ info->regs->cr = AMR_MUX_MCR4; info->regs->dr = 0; } } restore_flags(flags); } static void amd7930_bxmit(int dev, unsigned int chan, __u8 * buffer, unsigned long count, void (*callback)(void *, int), void *callback_arg) { struct amd7930_info *info; struct amd7930_channel *Bchan; register unsigned long flags; if (dev > num_drivers) { return; } info = (struct amd7930_info *) drivers[dev].private; Bchan = info->Bisdn[chan]; if (Bchan) { save_and_cli(flags); Bchan->output_ptr = buffer; Bchan->output_count = count; Bchan->output_callback = (void *) callback; Bchan->output_callback_arg = callback_arg; restore_flags(flags); } } static void amd7930_brecv(int dev, unsigned int chan, __u8 * buffer, unsigned long size, void (*callback)(void *, int, unsigned int), void *callback_arg) { struct amd7930_info *info; struct amd7930_channel *Bchan; register unsigned long flags; if (dev > num_drivers) { return; } info = (struct amd7930_info *) drivers[dev].private; Bchan = info->Bisdn[chan]; if (Bchan) { save_and_cli(flags); Bchan->input_ptr = buffer; Bchan->input_count = size; Bchan->input_callback = (void *) callback; Bchan->input_callback_arg = callback_arg; restore_flags(flags); } } struct foreign_interface amd7930_foreign_interface = { amd7930_get_irqnum, amd7930_get_liu_state, amd7930_liu_init, amd7930_liu_activate, amd7930_liu_deactivate, amd7930_dxmit, amd7930_drecv, amd7930_bopen, amd7930_bclose, amd7930_bxmit, amd7930_brecv }; EXPORT_SYMBOL(amd7930_foreign_interface); #endif /* * Device detection and initialization. */ static struct sparcaudio_operations amd7930_ops = { amd7930_open, amd7930_release, amd7930_ioctl, amd7930_start_output, amd7930_stop_output, amd7930_start_input, amd7930_stop_input, amd7930_sunaudio_getdev, amd7930_set_output_volume, amd7930_get_output_volume, amd7930_set_input_volume, amd7930_get_input_volume, amd7930_set_monitor_volume, amd7930_get_monitor_volume, NULL, /* amd7930_set_output_balance */ amd7930_get_output_balance, NULL, /* amd7930_set_input_balance */ amd7930_get_input_balance, amd7930_set_output_channels, amd7930_get_output_channels, amd7930_set_input_channels, amd7930_get_input_channels, amd7930_set_output_precision, amd7930_get_output_precision, amd7930_set_input_precision, amd7930_get_input_precision, amd7930_set_output_port, amd7930_get_output_port, NULL, /* amd7930_set_input_port */ amd7930_get_input_port, amd7930_set_encoding, amd7930_get_encoding, amd7930_set_encoding, amd7930_get_encoding, amd7930_set_output_rate, amd7930_get_output_rate, amd7930_set_input_rate, amd7930_get_input_rate, amd7930_sunaudio_getdev_sunos, amd7930_get_output_ports, amd7930_get_input_ports, NULL, /* amd7930_set_output_muted */ amd7930_get_output_muted, NULL, /* amd7930_set_output_pause */ NULL, /* amd7930_get_output_pause */ NULL, /* amd7930_set_input_pause */ NULL, /* amd7930_get_input_pause */ NULL, /* amd7930_set_output_samples */ NULL, /* amd7930_get_output_samples */ NULL, /* amd7930_set_input_samples */ NULL, /* amd7930_get_input_samples */ NULL, /* amd7930_set_output_error */ NULL, /* amd7930_get_output_error */ NULL, /* amd7930_set_input_error */ NULL, /* amd7930_get_input_error */ amd7930_get_formats, }; /* Attach to an amd7930 chip given its PROM node. */ static int amd7930_attach(struct sparcaudio_driver *drv, int node, struct linux_sbus *sbus, struct linux_sbus_device *sdev) { struct linux_prom_registers regs; struct linux_prom_irqs irq; struct amd7930_info *info; int err; /* Allocate our private information structure. */ drv->private = kmalloc(sizeof(struct amd7930_info), GFP_KERNEL); if (!drv->private) return -ENOMEM; /* Point at the information structure and initialize it. */ drv->ops = &amd7930_ops; info = (struct amd7930_info *)drv->private; memset(info, 0, sizeof(*info)); info->ints_on = 1; /* force disable below */ drv->dev = sdev; /* Map the registers into memory. */ prom_getproperty(node, "reg", (char *)®s, sizeof(regs)); if (sbus && sdev) prom_apply_sbus_ranges(sbus, ®s, 1, sdev); info->regs_size = regs.reg_size; info->regs = sparc_alloc_io(regs.phys_addr, 0, regs.reg_size, "amd7930", regs.which_io, 0); if (!info->regs) { printk(KERN_ERR "amd7930: could not allocate registers\n"); kfree(drv->private); return -EIO; } /* Put amd7930 in idle mode (interrupts disabled) */ amd7930_idle(info); /* Enable extended FIFO operation on D-channel */ info->regs->cr = AMR_DLC_EFCR; info->regs->dr = AMR_DLC_EFCR_EXTEND_FIFO; info->regs->cr = AMR_DLC_DMR4; info->regs->dr = /* AMR_DLC_DMR4_RCV_30 | */ AMR_DLC_DMR4_XMT_14; /* Attach the interrupt handler to the audio interrupt. */ prom_getproperty(node, "intr", (char *)&irq, sizeof(irq)); info->irq = irq.pri; request_irq(info->irq, amd7930_interrupt, SA_INTERRUPT, "amd7930", drv); enable_irq(info->irq); amd7930_enable_ints(info); /* Initalize the local copy of the MAP registers. */ memset(&info->map, 0, sizeof(info->map)); info->map.mmr1 = AM_MAP_MMR1_GX | AM_MAP_MMR1_GER | AM_MAP_MMR1_GR | AM_MAP_MMR1_STG; /* Start out with speaker, microphone */ info->map.mmr2 |= (AM_MAP_MMR2_LS | AM_MAP_MMR2_AINB); /* Set the default audio parameters. */ info->rgain = 128; info->pgain = 200; info->mgain = 0; amd7930_update_map(drv); /* Register the amd7930 with the midlevel audio driver. */ err = register_sparcaudio_driver(drv, 1); if (err < 0) { printk(KERN_ERR "amd7930: unable to register\n"); disable_irq(info->irq); free_irq(info->irq, drv); sparc_free_io(info->regs, info->regs_size); kfree(drv->private); return -EIO; } /* Announce the hardware to the user. */ printk(KERN_INFO "amd7930 at 0x%lx irq %d\n", (unsigned long)info->regs, info->irq); /* Success! */ return 0; } #ifdef MODULE /* Detach from an amd7930 chip given the device structure. */ static void amd7930_detach(struct sparcaudio_driver *drv) { struct amd7930_info *info = (struct amd7930_info *)drv->private; unregister_sparcaudio_driver(drv, 1); amd7930_idle(info); disable_irq(info->irq); free_irq(info->irq, drv); sparc_free_io(info->regs, info->regs_size); kfree(drv->private); } #endif /* Probe for the amd7930 chip and then attach the driver. */ #ifdef MODULE int init_module(void) #else __initfunc(int amd7930_init(void)) #endif { struct linux_sbus *bus; struct linux_sbus_device *sdev; int node; /* Try to find the sun4c "audio" node first. */ node = prom_getchild(prom_root_node); node = prom_searchsiblings(node, "audio"); if (node && amd7930_attach(&drivers[0], node, NULL, NULL) == 0) num_drivers = 1; else num_drivers = 0; /* Probe each SBUS for amd7930 chips. */ for_all_sbusdev(sdev,bus) { if (!strcmp(sdev->prom_name, "audio")) { /* Don't go over the max number of drivers. */ if (num_drivers >= MAX_DRIVERS) continue; if (amd7930_attach(&drivers[num_drivers], sdev->prom_node, sdev->my_bus, sdev) == 0) num_drivers++; } } /* Only return success if we found some amd7930 chips. */ return (num_drivers > 0) ? 0 : -EIO; } #ifdef MODULE void cleanup_module(void) { register int i; for (i = 0; i < num_drivers; i++) { amd7930_detach(&drivers[i]); num_drivers--; } } #endif |