amd7930.c
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- /* $Id: amd7930.c,v 1.28 2001/10/13 01:47:29 davem Exp $
- * drivers/sbus/audio/amd7930.c
- *
- * Copyright (C) 1996,1997 Thomas K. 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/slab.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"
- static __u8 bilinear2mulaw(__u8 data);
- static __u8 mulaw2bilinear(__u8 data);
- static __u8 linear2mulaw(__u16 data);
- static __u16 mulaw2linear(__u8 data);
- #if defined (AMD79C30_ISDN)
- #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 */
- u8 channel_status;
- /* Current buffer that the driver is playing on channel */
- volatile __u8 * output_ptr;
- volatile u32 output_count;
- u8 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 u32 input_count;
- volatile u32 input_limit;
- /* Callback routine (and argument) when input is done on */
- void (*input_callback)(void *, unsigned char, unsigned long);
- void * input_callback_arg;
- int input_format;
- int output_format;
- };
- /* 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. */
- unsigned long regs;
- unsigned long regs_size;
- struct amd7930_map map;
- /* Volume information. */
- int pgain, rgain, mgain;
- /* Device interrupt information. */
- int irq;
- volatile int ints_on;
- /* Format type */
- int format_type;
- /* 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. */
- static __inline__ void amd7930_out16(unsigned long regs, u16 val)
- {
- sbus_writeb(val & 0xff, regs + DR);
- sbus_writeb(val >> 8, regs + DR);
- }
- /* 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 void amd7930_enable_ints(struct amd7930_info *info)
- {
- unsigned long flags;
- save_and_cli(flags);
- if (!info->ints_on) {
- sbus_writeb(AMR_INIT, info->regs + CR);
- sbus_writeb(AM_INIT_ACTIVE, info->regs + DR);
- info->ints_on = 1;
- }
- restore_flags(flags);
- }
- /* Disable amd7930 interrupts atomically. */
- static __inline__ void amd7930_disable_ints(struct amd7930_info *info)
- {
- unsigned long flags;
- save_and_cli(flags);
- if (info->ints_on) {
- sbus_writeb(AMR_INIT, info->regs + CR);
- sbus_writeb(AM_INIT_ACTIVE | AM_INIT_DISABLE_INTS,
- info->regs + DR);
- info->ints_on = 0;
- }
- restore_flags(flags);
- }
- /* Idle amd7930 (no interrupts, no audio, no data) */
- static __inline__ void amd7930_idle(struct amd7930_info *info)
- {
- unsigned long flags;
- save_and_cli(flags);
- if (info->ints_on) {
- sbus_writeb(AMR_INIT, info->regs + CR);
- sbus_writeb(0, info->regs + DR);
- info->ints_on = 0;
- }
- restore_flags(flags);
- }
- /* 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;
- unsigned long regs = info->regs;
- struct amd7930_map *map = &info->map;
- unsigned long flags;
- save_and_cli(flags);
- sbus_writeb(AMR_MAP_GX, regs + CR);
- amd7930_out16(regs, map->gx);
- sbus_writeb(AMR_MAP_GR, regs + CR);
- amd7930_out16(regs, map->gr);
- sbus_writeb(AMR_MAP_STGR, regs + CR);
- amd7930_out16(regs, map->stgr);
- sbus_writeb(AMR_MAP_GER, regs + CR);
- amd7930_out16(regs, map->ger);
- sbus_writeb(AMR_MAP_MMR1, regs + CR);
- sbus_writeb(map->mmr1, regs + DR);
- sbus_writeb(AMR_MAP_MMR2, regs + CR);
- sbus_writeb(map->mmr2, regs + DR);
- 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 &&
- (sbus_readb(info->regs + DSR2) & AMR_DSR2_TBE)) {
- u8 byte = *(info->D.output_ptr);
- /* Send the next byte and advance buffer pointer. */
- sbus_writeb(byte, info->regs + DCTB);
- 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,
- sbus_readb(info->regs + DER));
- /* sbus_readb(info->regs + DER) & D_XMIT_ERRORS); */
- }
- /* Read the next byte(s) of incoming data. */
- while (sbus_readb(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) = sbus_readb(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 = sbus_readb(info->regs + DCRB);
- }
- debug_info(info, '<');
- if (sbus_readb(info->regs + DSR2) & AMR_DSR2_LBRP) {
- __u8 der;
- /* End of recv packet? Notify the midlevel driver. */
- debug_info(info, '!');
- info->D.input_ptr = NULL;
- der = sbus_readb(info->regs + DER) & D_RECV_ERRORS;
- /* Read receive byte count - advances FIFOs */
- sbus_writeb(AMR_DLC_DRCR, info->regs + CR);
- dummy = sbus_readb(info->regs + DR);
- dummy = sbus_readb(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,
- unsigned long reg)
- {
- /* Send the next byte of outgoing data. */
- if (channel->output_ptr && channel->output_count > 0) {
- u8 byte;
- /* Send the next byte and advance buffer pointer. */
- switch(channel->output_format) {
- case AUDIO_ENCODING_ULAW:
- case AUDIO_ENCODING_ALAW:
- byte = *(channel->output_ptr);
- sbus_writeb(byte, reg);
- break;
- case AUDIO_ENCODING_LINEAR8:
- byte = bilinear2mulaw(*(channel->output_ptr));
- sbus_writeb(byte, reg);
- break;
- case AUDIO_ENCODING_LINEAR:
- if (channel->output_count >= 2) {
- u16 val = channel->output_ptr[0] << 8;
- val |= channel->output_ptr[1];
- byte = linear2mulaw(val);
- sbus_writeb(byte, reg);
- channel->output_ptr++;
- channel->output_count--;
- };
- };
- 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 {
- sbus_writeb(channel->xmit_idle_char, reg);
- 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. */
- switch(channel->input_format) {
- case AUDIO_ENCODING_ULAW:
- case AUDIO_ENCODING_ALAW:
- *(channel->input_ptr) = sbus_readb(reg);
- break;
- case AUDIO_ENCODING_LINEAR8:
- *(channel->input_ptr) = mulaw2bilinear(sbus_readb(reg));
- break;
- case AUDIO_ENCODING_LINEAR:
- if (channel->input_count >= 2) {
- u16 val = mulaw2linear(sbus_readb(reg));
- channel->input_ptr[0] = val >> 8;
- channel->input_ptr[1] = val & 0xff;
- channel->input_ptr++;
- channel->input_count--;
- } else {
- *(channel->input_ptr) = 0;
- }
- };
- 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;
- unsigned long regs = info->regs;
- __u8 ir;
- /* Clear the interrupt. */
- ir = sbus_readb(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) {
- __u8 lsr;
- sbus_writeb(AMR_LIU_LSR, regs + CR);
- lsr = sbus_readb(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)
- {
- struct amd7930_info *info = (struct amd7930_info *) drv->private;
- switch(MINOR(inode->i_rdev) & 0xf) {
- case SPARCAUDIO_AUDIO_MINOR:
- info->format_type = AUDIO_ENCODING_ULAW;
- break;
- case SPARCAUDIO_DSP_MINOR:
- info->format_type = AUDIO_ENCODING_LINEAR8;
- break;
- case SPARCAUDIO_DSP16_MINOR:
- info->format_type = AUDIO_ENCODING_LINEAR;
- break;
- };
- 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 */
- sbus_writeb(AMR_MUX_MCR1, info->regs + CR);
- sbus_writeb(AM_MUX_CHANNEL_Ba | (AM_MUX_CHANNEL_Bb << 4),
- info->regs + DR);
- /* Enable B channel interrupts */
- sbus_writeb(AMR_MUX_MCR4, info->regs + CR);
- sbus_writeb(AM_MUX_MCR4_ENABLE_INTS, info->regs + DR);
- } else if (info->Bc.channel_status == CHANNEL_AVAILABLE) {
- info->Bc.channel_status = CHANNEL_INUSE;
- info->Baudio = &info->Bc;
- /* Multiplexor map - audio (Ba) to Bc */
- sbus_writeb(AMR_MUX_MCR1, info->regs + CR);
- sbus_writeb(AM_MUX_CHANNEL_Ba | (AM_MUX_CHANNEL_Bc << 4),
- info->regs + DR);
- /* Enable B channel interrupts */
- sbus_writeb(AMR_MUX_MCR4, info->regs + CR);
- sbus_writeb(AM_MUX_MCR4_ENABLE_INTS, info->regs + DR);
- }
- }
- static void release_Baudio(struct amd7930_info *info)
- {
- if (info->Baudio) {
- info->Baudio->channel_status = CHANNEL_AVAILABLE;
- sbus_writeb(AMR_MUX_MCR1, info->regs + CR);
- sbus_writeb(0, info->regs + DR);
- info->Baudio = NULL;
- if (info->Bb.channel_status == CHANNEL_AVAILABLE &&
- info->Bc.channel_status == CHANNEL_AVAILABLE) {
- /* Disable B channel interrupts */
- sbus_writeb(AMR_MUX_MCR4, info->regs + CR);
- sbus_writeb(0, info->regs + DR);
- }
- }
- }
- 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_format = info->format_type;
- 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_format = info->format_type;
- 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 | AFMT_U8 | AFMT_S16_BE);
- }
- 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) &&
- (info->format_type == AUDIO_ENCODING_ALAW))
- return AUDIO_ENCODING_ALAW;
- return info->format_type;
- }
- 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_ALAW:
- info->map.mmr1 |= AM_MAP_MMR1_ALAW;
- break;
- case AUDIO_ENCODING_LINEAR8:
- case AUDIO_ENCODING_LINEAR:
- case AUDIO_ENCODING_ULAW:
- info->map.mmr1 &= ~AM_MAP_MMR1_ALAW;
- break;
- default:
- return -EINVAL;
- };
- info->format_type = value;
- 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);
- }
- 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)
- 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;
- 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) */
- sbus_writeb(AMR_LIU_LMR1, info->regs + CR);
- sbus_writeb(0, info->regs + DR);
- /* Request interrupt when LIU changes state from/to F3/F7/F8 */
- sbus_writeb(AMR_LIU_LMR2, info->regs + CR);
- sbus_writeb(AM_LIU_LMR2_EN_F3_INT |
- AM_LIU_LMR2_EN_F7_INT |
- AM_LIU_LMR2_EN_F8_INT,
- info->regs + DR);
- /* amd7930_enable_ints(info); */
- /* Activate the ISDN Line Interface Unit (LIU) */
- sbus_writeb(AMR_LIU_LMR1, info->regs + CR);
- sbus_writeb(AM_LIU_LMR1_LIU_ENABL, info->regs + DR);
- restore_flags(flags);
- }
- static void amd7930_liu_activate(int dev, int priority)
- {
- struct amd7930_info *info;
- 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
- */
- sbus_writeb(AMR_LIU_LPR, info->regs + CR);
- sbus_writeb(priority & 0x0f, info->regs + DR);
- /* request LIU activation */
- sbus_writeb(AMR_LIU_LMR1, info->regs + CR);
- sbus_writeb(AM_LIU_LMR1_LIU_ENABL | AM_LIU_LMR1_REQ_ACTIV,
- info->regs + DR);
- restore_flags(flags);
- }
- static void amd7930_liu_deactivate(int dev)
- {
- struct amd7930_info *info;
- unsigned long flags;
- if (dev > num_drivers)
- return;
- info = (struct amd7930_info *) drivers[dev].private;
- save_and_cli(flags);
- /* deactivate LIU */
- sbus_writeb(AMR_LIU_LMR1, info->regs + CR);
- sbus_writeb(0, info->regs + DR);
- 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;
- 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 usen");
- 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 */
- sbus_writeb(AMR_DLC_DMR1, info->regs + CR);
- dmr1 = sbus_readb(info->regs + DR);
- dmr1 |= AMR_DLC_DMR1_DTTHRSH_INT;
- dmr1 &= ~AMR_DLC_DMR1_EN_ADDRS;
- sbus_writeb(dmr1, info->regs + DR);
- /* Begin xmit by setting D-channel Transmit Byte Count Reg (DTCR) */
- sbus_writeb(AMR_DLC_DTCR, info->regs + CR);
- sbus_writeb(count & 0xff, info->regs + DR);
- sbus_writeb((count >> 8) & 0xff, info->regs + DR);
- /* 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;
- 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
- */
- sbus_writeb(AMR_DLC_DMR1, info->regs + CR);
- dmr1 = sbus_readb(info->regs + DR);
- dmr1 |= AMR_DLC_DMR1_DRTHRSH_INT | AMR_DLC_DMR1_EORP_INT;
- dmr1 &= ~AMR_DLC_DMR1_EN_ADDRS;
- sbus_writeb(dmr1, info->regs + DR);
- /* Set D-channel Receive Byte Count Limit Register */
- sbus_writeb(AMR_DLC_DRCR, info->regs + CR);
- sbus_writeb(size & 0xff, info->regs + DR);
- sbus_writeb((size >> 8) & 0xff, info->regs + DR);
- restore_flags(flags);
- }
- static int amd7930_bopen(int dev, unsigned int chan,
- int mode, u_char xmit_idle_char)
- {
- struct amd7930_info *info;
- unsigned long flags;
- u8 tmp;
- 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 */
- sbus_writeb(AMR_MUX_MCR2 + chan, info->regs + CR);
- sbus_writeb((AM_MUX_CHANNEL_B1 + chan) |
- (AM_MUX_CHANNEL_Bb << 4),
- info->regs + DR);
- } 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 */
- sbus_writeb(AMR_MUX_MCR2 + chan, info->regs + CR);
- sbus_writeb((AM_MUX_CHANNEL_B1 + chan) |
- (AM_MUX_CHANNEL_Bc << 4),
- info->regs + DR);
- } else {
- restore_flags(flags);
- return (-1);
- }
- /* Enable B channel transmit */
- sbus_writeb(AMR_LIU_LMR1, info->regs + CR);
- tmp = sbus_readb(info->regs + DR);
- tmp |= AM_LIU_LMR1_B1_ENABL + chan;
- sbus_writeb(tmp, info->regs + DR);
- /* Enable B channel interrupts */
- sbus_writeb(AMR_MUX_MCR4, info->regs + CR);
- sbus_writeb(AM_MUX_MCR4_ENABLE_INTS |
- AM_MUX_MCR4_REVERSE_Bb |
- AM_MUX_MCR4_REVERSE_Bc,
- info->regs + DR);
- restore_flags(flags);
- return 0;
- }
- static void amd7930_bclose(int dev, unsigned int chan)
- {
- struct amd7930_info *info;
- 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]) {
- u8 tmp;
- info->Bisdn[chan]->channel_status = CHANNEL_AVAILABLE;
- sbus_writeb(AMR_MUX_MCR2 + chan, info->regs + CR);
- sbus_writeb(0, info->regs + DR);
- info->Bisdn[chan] = NULL;
- /* Disable B channel transmit */
- sbus_writeb(AMR_LIU_LMR1, info->regs + CR);
- tmp = sbus_readb(info->regs + DR);
- tmp &= ~(AM_LIU_LMR1_B1_ENABL + chan);
- sbus_writeb(tmp, info->regs + DR);
- if (info->Bb.channel_status == CHANNEL_AVAILABLE &&
- info->Bc.channel_status == CHANNEL_AVAILABLE) {
- /* Disable B channel interrupts */
- sbus_writeb(AMR_MUX_MCR4, info->regs + CR);
- sbus_writeb(0, info->regs + DR);
- }
- }
- 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;
- 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_format = AUDIO_ENCODING_ULAW;
- 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;
- 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_format = AUDIO_ENCODING_ULAW;
- 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 sbus_bus *sbus, struct sbus_dev *sdev)
- {
- struct linux_prom_registers regs;
- struct linux_prom_irqs irq;
- struct resource res, *resp;
- struct amd7930_info *info;
- int err;
- /* Allocate our private information structure. */
- drv->private = kmalloc(sizeof(struct amd7930_info), GFP_KERNEL);
- if (drv->private == NULL)
- 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) {
- resp = &sdev->resource[0];
- } else {
- resp = &res;
- res.start = regs.phys_addr;
- res.end = res.start + regs.reg_size - 1;
- res.flags = IORESOURCE_IO | (regs.which_io & 0xff);
- }
- info->regs_size = regs.reg_size;
- info->regs = sbus_ioremap(resp, 0, regs.reg_size, "amd7930");
- if (!info->regs) {
- printk(KERN_ERR "amd7930: could not remap registersn");
- kfree(drv->private);
- return -EIO;
- }
- /* Put amd7930 in idle mode (interrupts disabled) */
- amd7930_idle(info);
- /* Enable extended FIFO operation on D-channel */
- sbus_writeb(AMR_DLC_EFCR, info->regs + CR);
- sbus_writeb(AMR_DLC_EFCR_EXTEND_FIFO, info->regs + DR);
- sbus_writeb(AMR_DLC_DMR4, info->regs + CR);
- sbus_writeb(/* AMR_DLC_DMR4_RCV_30 | */ AMR_DLC_DMR4_XMT_14,
- info->regs + DR);
- /* 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;
- info->format_type = AUDIO_ENCODING_ULAW;
- info->Bb.input_format = AUDIO_ENCODING_ULAW;
- info->Bb.output_format = AUDIO_ENCODING_ULAW;
- info->Bc.input_format = AUDIO_ENCODING_ULAW;
- info->Bc.output_format = AUDIO_ENCODING_ULAW;
- 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 registern");
- disable_irq(info->irq);
- free_irq(info->irq, drv);
- sbus_iounmap(info->regs, info->regs_size);
- kfree(drv->private);
- return -EIO;
- }
- /* Announce the hardware to the user. */
- printk(KERN_INFO "amd7930 at %lx irq %dn",
- info->regs, info->irq);
- /* Success! */
- return 0;
- }
- /* Detach from an amd7930 chip given the device structure. */
- static void __exit 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);
- sbus_iounmap(info->regs, info->regs_size);
- kfree(drv->private);
- }
- /* Probe for the amd7930 chip and then attach the driver. */
- static int __init amd7930_init(void)
- {
- struct sbus_bus *sbus;
- struct sbus_dev *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, sbus) {
- 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->bus, sdev) == 0)
- num_drivers++;
- }
- }
- /* Only return success if we found some amd7930 chips. */
- return (num_drivers > 0) ? 0 : -EIO;
- }
- static void __exit amd7930_exit(void)
- {
- register int i;
- for (i = 0; i < num_drivers; i++) {
- amd7930_detach(&drivers[i]);
- num_drivers--;
- }
- }
- module_init(amd7930_init);
- module_exit(amd7930_exit);
- MODULE_LICENSE("GPL");
- /*************************************************************/
- /* Audio format conversion */
- /*************************************************************/
- /* Translation tables */
- static unsigned char ulaw[] = {
- 3, 7, 11, 15, 19, 23, 27, 31,
- 35, 39, 43, 47, 51, 55, 59, 63,
- 66, 68, 70, 72, 74, 76, 78, 80,
- 82, 84, 86, 88, 90, 92, 94, 96,
- 98, 99, 100, 101, 102, 103, 104, 105,
- 106, 107, 108, 109, 110, 111, 112, 113,
- 113, 114, 114, 115, 115, 116, 116, 117,
- 117, 118, 118, 119, 119, 120, 120, 121,
- 121, 121, 122, 122, 122, 122, 123, 123,
- 123, 123, 124, 124, 124, 124, 125, 125,
- 125, 125, 125, 125, 126, 126, 126, 126,
- 126, 126, 126, 126, 127, 127, 127, 127,
- 127, 127, 127, 127, 127, 127, 127, 127,
- 128, 128, 128, 128, 128, 128, 128, 128,
- 128, 128, 128, 128, 128, 128, 128, 128,
- 128, 128, 128, 128, 128, 128, 128, 128,
- 253, 249, 245, 241, 237, 233, 229, 225,
- 221, 217, 213, 209, 205, 201, 197, 193,
- 190, 188, 186, 184, 182, 180, 178, 176,
- 174, 172, 170, 168, 166, 164, 162, 160,
- 158, 157, 156, 155, 154, 153, 152, 151,
- 150, 149, 148, 147, 146, 145, 144, 143,
- 143, 142, 142, 141, 141, 140, 140, 139,
- 139, 138, 138, 137, 137, 136, 136, 135,
- 135, 135, 134, 134, 134, 134, 133, 133,
- 133, 133, 132, 132, 132, 132, 131, 131,
- 131, 131, 131, 131, 130, 130, 130, 130,
- 130, 130, 130, 130, 129, 129, 129, 129,
- 129, 129, 129, 129, 129, 129, 129, 129,
- 128, 128, 128, 128, 128, 128, 128, 128,
- 128, 128, 128, 128, 128, 128, 128, 128,
- 128, 128, 128, 128, 128, 128, 128, 128
- };
- static __u8 mulaw2bilinear(__u8 data)
- {
- return ulaw[data];
- }
- static unsigned char linear[] = {
- 0, 0, 0, 0, 0, 0, 0, 1,
- 0, 0, 0, 2, 0, 0, 0, 3,
- 0, 0, 0, 4, 0, 0, 0, 5,
- 0, 0, 0, 6, 0, 0, 0, 7,
- 0, 0, 0, 8, 0, 0, 0, 9,
- 0, 0, 0, 10, 0, 0, 0, 11,
- 0, 0, 0, 12, 0, 0, 0, 13,
- 0, 0, 0, 14, 0, 0, 0, 15,
- 0, 0, 16, 0, 17, 0, 18, 0,
- 19, 0, 20, 0, 21, 0, 22, 0,
- 23, 0, 24, 0, 25, 0, 26, 0,
- 27, 0, 28, 0, 29, 0, 30, 0,
- 31, 0, 32, 33, 34, 35, 36, 37,
- 38, 39, 40, 41, 42, 43, 44, 45,
- 46, 48, 50, 52, 54, 56, 58, 60,
- 62, 65, 69, 73, 77, 83, 91, 103,
- 255, 231, 219, 211, 205, 201, 197, 193,
- 190, 188, 186, 184, 182, 180, 178, 176,
- 174, 173, 172, 171, 170, 169, 168, 167,
- 166, 165, 164, 163, 162, 161, 160, 0,
- 159, 0, 158, 0, 157, 0, 156, 0,
- 155, 0, 154, 0, 153, 0, 152, 0,
- 151, 0, 150, 0, 149, 0, 148, 0,
- 147, 0, 146, 0, 145, 0, 144, 0,
- 0, 143, 0, 0, 0, 142, 0, 0,
- 0, 141, 0, 0, 0, 140, 0, 0,
- 0, 139, 0, 0, 0, 138, 0, 0,
- 0, 137, 0, 0, 0, 136, 0, 0,
- 0, 135, 0, 0, 0, 134, 0, 0,
- 0, 133, 0, 0, 0, 132, 0, 0,
- 0, 131, 0, 0, 0, 130, 0, 0,
- 0, 129, 0, 0, 0, 128, 0, 0
- };
- static __u8 bilinear2mulaw(__u8 data)
- {
- return linear[data];
- }
- static int exp_lut[256] = {
- 0,0,1,1,2,2,2,2,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
- 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
- 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
- 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7
- };
- #define BIAS 0x84
- #define CLIP 32635
- #define SWAP_ENDIAN(x) ((x >> 8) | ((x & 0xff) << 8))
- static __u8 linear2mulaw(__u16 data)
- {
- static int sign, exponent, mantissa;
- /* not really sure, if swapping is ok - comment next line to disable it */
- data = SWAP_ENDIAN(data);
-
- sign = (data >> 8) & 0x80;
- if (sign != 0) data = -data;
- if (data > CLIP) data = CLIP;
- data += BIAS;
- exponent = exp_lut[(data >> 7) & 0xFF];
- mantissa = (data >> (exponent + 3)) & 0x0F;
- return (~(sign | (exponent << 4) | mantissa));
- }
- static __u16 mulaw2linear(__u8 data)
- {
- /* this conversion is not working */
- return data;
- }
- #if 0
- #define INOUT(x,y) (((x) << 16) | (y))
- static int convert_audio(int in_format, int out_format, __u8* buffer, int count)
- {
- static int i,sign,exponent;
- static __u16 data;
- if (in_format == out_format) return count;
- switch(INOUT(in_format, out_format)) {
- case INOUT(AUDIO_ENCODING_ULAW, AUDIO_ENCODING_LINEAR8):
- for (i = 0;i < count; i++) {
- buffer[i] = ulaw[buffer[i]];
- };
- break;
- case INOUT(AUDIO_ENCODING_ULAW, AUDIO_ENCODING_LINEAR):
- break;
- case INOUT(AUDIO_ENCODING_LINEAR, AUDIO_ENCODING_ULAW):
- /* buffer is two-byte => convert to first */
- for (i = 0; i < count/2; i++) {
- data = ((__u16*)buffer)[i];
- sign = (data >> 8) & 0x80;
- if (data > CLIP) data = CLIP;
- data += BIAS;
- exponent = exp_lut[(data >> 7) & 0xFF];
- buffer[i] = ~(sign | (exponent << 4) |
- ((data >> (exponent + 3)) & 0x0F));
- };
- break;
- case INOUT(AUDIO_ENCODING_LINEAR8, AUDIO_ENCODING_ULAW):
- for (i = 0; i < count; i++) {
- buffer[i] = linear[buffer[i]];
- };
- break;
- default:
- return 0;
- };
- return count;
- }
- #undef INOUT
- #endif
- #undef BIAS
- #undef CLIP
- #undef SWAP_ENDIAN