PATCH: Add swarm driver for broadcom boards
Alan Cox (alan@lxorguk.ukuu.org.uk)
Fri, 11 Jul 2003 19:17:13 +0100
diff -u --new-file --recursive --exclude-from /usr/src/exclude linux-2.5.75/sound/oss/swarm_cs4297a.c linux-2.5.75-ac1/sound/oss/swarm_cs4297a.c
--- linux-2.5.75/sound/oss/swarm_cs4297a.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.5.75-ac1/sound/oss/swarm_cs4297a.c 2003-07-11 16:51:31.000000000 +0100
@@ -0,0 +1,2745 @@
+/*******************************************************************************
+*
+* "swarm_cs4297a.c" -- Cirrus Logic-Crystal CS4297a linux audio driver.
+*
+* Copyright (C) 2001 Broadcom Corporation.
+* Copyright (C) 2000,2001 Cirrus Logic Corp.
+* -- adapted from drivers by Thomas Sailer,
+* -- but don't bug him; Problems should go to:
+* -- tom woller (twoller@crystal.cirrus.com) or
+* (audio@crystal.cirrus.com).
+* -- adapted from cs4281 PCI driver for cs4297a on
+* BCM1250 Synchronous Serial interface
+* (kwalker@broadcom.com)
+*
+* This program is free software; you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation; either version 2 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program; if not, write to the Free Software
+* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*
+* Module command line parameters:
+* none
+*
+* Supported devices:
+* /dev/dsp standard /dev/dsp device, (mostly) OSS compatible
+* /dev/mixer standard /dev/mixer device, (mostly) OSS compatible
+* /dev/midi simple MIDI UART interface, no ioctl
+*
+* Modification History
+* 08/20/00 trw - silence and no stopping DAC until release
+* 08/23/00 trw - added CS_DBG statements, fix interrupt hang issue on DAC stop.
+* 09/18/00 trw - added 16bit only record with conversion
+* 09/24/00 trw - added Enhanced Full duplex (separate simultaneous
+* capture/playback rates)
+* 10/03/00 trw - fixed mmap (fixed GRECORD and the XMMS mmap test plugin
+* libOSSm.so)
+* 10/11/00 trw - modified for 2.4.0-test9 kernel enhancements (NR_MAP removal)
+* 11/03/00 trw - fixed interrupt loss/stutter, added debug.
+* 11/10/00 bkz - added __devinit to cs4297a_hw_init()
+* 11/10/00 trw - fixed SMP and capture spinlock hang.
+* 12/04/00 trw - cleaned up CSDEBUG flags and added "defaultorder" moduleparm.
+* 12/05/00 trw - fixed polling (myth2), and added underrun swptr fix.
+* 12/08/00 trw - added PM support.
+* 12/14/00 trw - added wrapper code, builds under 2.4.0, 2.2.17-20, 2.2.17-8
+* (RH/Dell base), 2.2.18, 2.2.12. cleaned up code mods by ident.
+* 12/19/00 trw - added PM support for 2.2 base (apm_callback). other PM cleanup.
+* 12/21/00 trw - added fractional "defaultorder" inputs. if >100 then use
+* defaultorder-100 as power of 2 for the buffer size. example:
+* 106 = 2^(106-100) = 2^6 = 64 bytes for the buffer size.
+*
+*******************************************************************************/
+
+#include <linux/list.h>
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/ioport.h>
+#include <linux/sched.h>
+#include <linux/delay.h>
+#include <linux/sound.h>
+#include <linux/slab.h>
+#include <linux/soundcard.h>
+#include <linux/ac97_codec.h>
+#include <linux/pci.h>
+#include <linux/bitops.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <linux/init.h>
+#include <linux/poll.h>
+#include <linux/smp_lock.h>
+#include <linux/wrapper.h>
+#include <asm/uaccess.h>
+#include <asm/hardirq.h>
+
+#include <asm/sibyte/sb1250_regs.h>
+#include <asm/sibyte/sb1250_int.h>
+#include <asm/sibyte/sb1250_dma.h>
+#include <asm/sibyte/sb1250_scd.h>
+#include <asm/sibyte/sb1250_syncser.h>
+#include <asm/sibyte/sb1250_mac.h>
+#include <asm/sibyte/sb1250.h>
+#include <asm/sibyte/64bit.h>
+
+struct cs4297a_state;
+EXPORT_NO_SYMBOLS;
+
+static void stop_dac(struct cs4297a_state *s);
+static void stop_adc(struct cs4297a_state *s);
+static void start_dac(struct cs4297a_state *s);
+static void start_adc(struct cs4297a_state *s);
+#undef OSS_DOCUMENTED_MIXER_SEMANTICS
+
+// ---------------------------------------------------------------------
+
+#define CS4297a_MAGIC 0xf00beef1
+
+// buffer order determines the size of the dma buffer for the driver.
+// under Linux, a smaller buffer allows more responsiveness from many of the
+// applications (e.g. games). A larger buffer allows some of the apps (esound)
+// to not underrun the dma buffer as easily. As default, use 32k (order=3)
+// rather than 64k as some of the games work more responsively.
+// log base 2( buff sz = 32k).
+
+//static unsigned long defaultorder = 3;
+//MODULE_PARM(defaultorder, "i");
+
+//
+// Turn on/off debugging compilation by commenting out "#define CSDEBUG"
+//
+#define CSDEBUG 0
+#if CSDEBUG
+#define CSDEBUG_INTERFACE 1
+#else
+#undef CSDEBUG_INTERFACE
+#endif
+//
+// cs_debugmask areas
+//
+#define CS_INIT 0x00000001 // initialization and probe functions
+#define CS_ERROR 0x00000002 // tmp debugging bit placeholder
+#define CS_INTERRUPT 0x00000004 // interrupt handler (separate from all other)
+#define CS_FUNCTION 0x00000008 // enter/leave functions
+#define CS_WAVE_WRITE 0x00000010 // write information for wave
+#define CS_WAVE_READ 0x00000020 // read information for wave
+#define CS_AC97 0x00000040 // AC97 register access
+#define CS_DESCR 0x00000080 // descriptor management
+#define CS_OPEN 0x00000400 // all open functions in the driver
+#define CS_RELEASE 0x00000800 // all release functions in the driver
+#define CS_PARMS 0x00001000 // functional and operational parameters
+#define CS_IOCTL 0x00002000 // ioctl (non-mixer)
+#define CS_TMP 0x10000000 // tmp debug mask bit
+
+//
+// CSDEBUG is usual mode is set to 1, then use the
+// cs_debuglevel and cs_debugmask to turn on or off debugging.
+// Debug level of 1 has been defined to be kernel errors and info
+// that should be printed on any released driver.
+//
+#if CSDEBUG
+#define CS_DBGOUT(mask,level,x) if((cs_debuglevel >= (level)) && ((mask) & cs_debugmask) ) {x;}
+#else
+#define CS_DBGOUT(mask,level,x)
+#endif
+
+#if CSDEBUG
+static unsigned long cs_debuglevel = 4; // levels range from 1-9
+static unsigned long cs_debugmask = CS_INIT /*| CS_IOCTL*/;
+MODULE_PARM(cs_debuglevel, "i");
+MODULE_PARM(cs_debugmask, "i");
+#endif
+#define CS_TRUE 1
+#define CS_FALSE 0
+
+#define CS_TYPE_ADC 0
+#define CS_TYPE_DAC 1
+
+#define SER_BASE (A_SER_BASE_1 + KSEG1)
+#define SS_CSR(t) (SER_BASE+t)
+#define SS_TXTBL(t) (SER_BASE+R_SER_TX_TABLE_BASE+(t*8))
+#define SS_RXTBL(t) (SER_BASE+R_SER_RX_TABLE_BASE+(t*8))
+
+#define FRAME_BYTES 32
+#define FRAME_SAMPLE_BYTES 4
+
+/* Should this be variable? */
+#define SAMPLE_BUF_SIZE (16*1024)
+#define SAMPLE_FRAME_COUNT (SAMPLE_BUF_SIZE / FRAME_SAMPLE_BYTES)
+/* The driver can explode/shrink the frames to/from a smaller sample
+ buffer */
+#define DMA_BLOAT_FACTOR 1
+#define DMA_DESCR (SAMPLE_FRAME_COUNT / DMA_BLOAT_FACTOR)
+#define DMA_BUF_SIZE (DMA_DESCR * FRAME_BYTES)
+
+/* Use the maxmium count (255 == 5.1 ms between interrupts) */
+#define DMA_INT_CNT ((1 << S_DMA_INT_PKTCNT) - 1)
+
+/* Figure this out: how many TX DMAs ahead to schedule a reg access */
+#define REG_LATENCY 150
+
+#define FRAME_TX_US 20
+
+#define SERDMA_NEXTBUF(d,f) (((d)->f+1) % (d)->ringsz)
+
+static const char invalid_magic[] =
+ KERN_CRIT "cs4297a: invalid magic value\n";
+
+#define VALIDATE_STATE(s) \
+({ \
+ if (!(s) || (s)->magic != CS4297a_MAGIC) { \
+ printk(invalid_magic); \
+ return -ENXIO; \
+ } \
+})
+
+struct list_head cs4297a_devs = { &cs4297a_devs, &cs4297a_devs };
+
+typedef struct serdma_descr_s {
+ u64 descr_a;
+ u64 descr_b;
+} serdma_descr_t;
+
+typedef unsigned long paddr_t;
+
+typedef struct serdma_s {
+ unsigned ringsz;
+ serdma_descr_t *descrtab;
+ serdma_descr_t *descrtab_end;
+ paddr_t descrtab_phys;
+
+ serdma_descr_t *descr_add;
+ serdma_descr_t *descr_rem;
+
+ u64 *dma_buf; // buffer for DMA contents (frames)
+ paddr_t dma_buf_phys;
+ u16 *sample_buf; // tmp buffer for sample conversions
+ u16 *sb_swptr;
+ u16 *sb_hwptr;
+ u16 *sb_end;
+
+ dma_addr_t dmaaddr;
+// unsigned buforder; // Log base 2 of 'dma_buf' size in bytes..
+ unsigned numfrag; // # of 'fragments' in the buffer.
+ unsigned fragshift; // Log base 2 of fragment size.
+ unsigned hwptr, swptr;
+ unsigned total_bytes; // # bytes process since open.
+ unsigned blocks; // last returned blocks value GETOPTR
+ unsigned wakeup; // interrupt occurred on block
+ int count;
+ unsigned underrun; // underrun flag
+ unsigned error; // over/underrun
+ wait_queue_head_t wait;
+ wait_queue_head_t reg_wait;
+ // redundant, but makes calculations easier
+ unsigned fragsize; // 2**fragshift..
+ unsigned sbufsz; // 2**buforder.
+ unsigned fragsamples;
+ // OSS stuff
+ unsigned mapped:1; // Buffer mapped in cs4297a_mmap()?
+ unsigned ready:1; // prog_dmabuf_dac()/adc() successful?
+ unsigned endcleared:1;
+ unsigned type:1; // adc or dac buffer (CS_TYPE_XXX)
+ unsigned ossfragshift;
+ int ossmaxfrags;
+ unsigned subdivision;
+} serdma_t;
+
+struct cs4297a_state {
+ // magic
+ unsigned int magic;
+
+ struct list_head list;
+
+ // soundcore stuff
+ int dev_audio;
+ int dev_mixer;
+
+ // hardware resources
+ unsigned int irq;
+
+ struct {
+ unsigned int rx_ovrrn; /* FIFO */
+ unsigned int rx_overflow; /* staging buffer */
+ unsigned int tx_underrun;
+ unsigned int rx_bad;
+ unsigned int rx_good;
+ } stats;
+
+ // mixer registers
+ struct {
+ unsigned short vol[10];
+ unsigned int recsrc;
+ unsigned int modcnt;
+ unsigned short micpreamp;
+ } mix;
+
+ // wave stuff
+ struct properties {
+ unsigned fmt;
+ unsigned fmt_original; // original requested format
+ unsigned channels;
+ unsigned rate;
+ } prop_dac, prop_adc;
+ unsigned conversion:1; // conversion from 16 to 8 bit in progress
+ unsigned ena;
+ spinlock_t lock;
+ struct semaphore open_sem;
+ struct semaphore open_sem_adc;
+ struct semaphore open_sem_dac;
+ mode_t open_mode;
+ wait_queue_head_t open_wait;
+ wait_queue_head_t open_wait_adc;
+ wait_queue_head_t open_wait_dac;
+
+ dma_addr_t dmaaddr_sample_buf;
+ unsigned buforder_sample_buf; // Log base 2 of 'dma_buf' size in bytes..
+
+ serdma_t dma_dac, dma_adc;
+
+ volatile u16 read_value;
+ volatile u16 read_reg;
+ volatile u64 reg_request;
+};
+
+#if 1
+#define prog_codec(a,b)
+#define dealloc_dmabuf(a,b);
+#endif
+
+static int prog_dmabuf_adc(struct cs4297a_state *s)
+{
+ s->dma_adc.ready = 1;
+ return 0;
+}
+
+
+static int prog_dmabuf_dac(struct cs4297a_state *s)
+{
+ s->dma_dac.ready = 1;
+ return 0;
+}
+
+static void clear_advance(void *buf, unsigned bsize, unsigned bptr,
+ unsigned len, unsigned char c)
+{
+ if (bptr + len > bsize) {
+ unsigned x = bsize - bptr;
+ memset(((char *) buf) + bptr, c, x);
+ bptr = 0;
+ len -= x;
+ }
+ CS_DBGOUT(CS_WAVE_WRITE, 4, printk(KERN_INFO
+ "cs4297a: clear_advance(): memset %d at 0x%.8x for %d size \n",
+ (unsigned)c, (unsigned)((char *) buf) + bptr, len));
+ memset(((char *) buf) + bptr, c, len);
+}
+
+#if CSDEBUG
+
+// DEBUG ROUTINES
+
+#define SOUND_MIXER_CS_GETDBGLEVEL _SIOWR('M',120, int)
+#define SOUND_MIXER_CS_SETDBGLEVEL _SIOWR('M',121, int)
+#define SOUND_MIXER_CS_GETDBGMASK _SIOWR('M',122, int)
+#define SOUND_MIXER_CS_SETDBGMASK _SIOWR('M',123, int)
+
+static void cs_printioctl(unsigned int x)
+{
+ unsigned int i;
+ unsigned char vidx;
+ // Index of mixtable1[] member is Device ID
+ // and must be <= SOUND_MIXER_NRDEVICES.
+ // Value of array member is index into s->mix.vol[]
+ static const unsigned char mixtable1[SOUND_MIXER_NRDEVICES] = {
+ [SOUND_MIXER_PCM] = 1, // voice
+ [SOUND_MIXER_LINE1] = 2, // AUX
+ [SOUND_MIXER_CD] = 3, // CD
+ [SOUND_MIXER_LINE] = 4, // Line
+ [SOUND_MIXER_SYNTH] = 5, // FM
+ [SOUND_MIXER_MIC] = 6, // Mic
+ [SOUND_MIXER_SPEAKER] = 7, // Speaker
+ [SOUND_MIXER_RECLEV] = 8, // Recording level
+ [SOUND_MIXER_VOLUME] = 9 // Master Volume
+ };
+
+ switch (x) {
+ case SOUND_MIXER_CS_GETDBGMASK:
+ CS_DBGOUT(CS_IOCTL, 4,
+ printk("SOUND_MIXER_CS_GETDBGMASK:\n"));
+ break;
+ case SOUND_MIXER_CS_GETDBGLEVEL:
+ CS_DBGOUT(CS_IOCTL, 4,
+ printk("SOUND_MIXER_CS_GETDBGLEVEL:\n"));
+ break;
+ case SOUND_MIXER_CS_SETDBGMASK:
+ CS_DBGOUT(CS_IOCTL, 4,
+ printk("SOUND_MIXER_CS_SETDBGMASK:\n"));
+ break;
+ case SOUND_MIXER_CS_SETDBGLEVEL:
+ CS_DBGOUT(CS_IOCTL, 4,
+ printk("SOUND_MIXER_CS_SETDBGLEVEL:\n"));
+ break;
+ case OSS_GETVERSION:
+ CS_DBGOUT(CS_IOCTL, 4, printk("OSS_GETVERSION:\n"));
+ break;
+ case SNDCTL_DSP_SYNC:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_SYNC:\n"));
+ break;
+ case SNDCTL_DSP_SETDUPLEX:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_SETDUPLEX:\n"));
+ break;
+ case SNDCTL_DSP_GETCAPS:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_GETCAPS:\n"));
+ break;
+ case SNDCTL_DSP_RESET:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_RESET:\n"));
+ break;
+ case SNDCTL_DSP_SPEED:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_SPEED:\n"));
+ break;
+ case SNDCTL_DSP_STEREO:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_STEREO:\n"));
+ break;
+ case SNDCTL_DSP_CHANNELS:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_CHANNELS:\n"));
+ break;
+ case SNDCTL_DSP_GETFMTS:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_GETFMTS:\n"));
+ break;
+ case SNDCTL_DSP_SETFMT:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_SETFMT:\n"));
+ break;
+ case SNDCTL_DSP_POST:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_POST:\n"));
+ break;
+ case SNDCTL_DSP_GETTRIGGER:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_GETTRIGGER:\n"));
+ break;
+ case SNDCTL_DSP_SETTRIGGER:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_SETTRIGGER:\n"));
+ break;
+ case SNDCTL_DSP_GETOSPACE:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_GETOSPACE:\n"));
+ break;
+ case SNDCTL_DSP_GETISPACE:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_GETISPACE:\n"));
+ break;
+ case SNDCTL_DSP_NONBLOCK:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_NONBLOCK:\n"));
+ break;
+ case SNDCTL_DSP_GETODELAY:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_GETODELAY:\n"));
+ break;
+ case SNDCTL_DSP_GETIPTR:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_GETIPTR:\n"));
+ break;
+ case SNDCTL_DSP_GETOPTR:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_GETOPTR:\n"));
+ break;
+ case SNDCTL_DSP_GETBLKSIZE:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_GETBLKSIZE:\n"));
+ break;
+ case SNDCTL_DSP_SETFRAGMENT:
+ CS_DBGOUT(CS_IOCTL, 4,
+ printk("SNDCTL_DSP_SETFRAGMENT:\n"));
+ break;
+ case SNDCTL_DSP_SUBDIVIDE:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_SUBDIVIDE:\n"));
+ break;
+ case SOUND_PCM_READ_RATE:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_PCM_READ_RATE:\n"));
+ break;
+ case SOUND_PCM_READ_CHANNELS:
+ CS_DBGOUT(CS_IOCTL, 4,
+ printk("SOUND_PCM_READ_CHANNELS:\n"));
+ break;
+ case SOUND_PCM_READ_BITS:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_PCM_READ_BITS:\n"));
+ break;
+ case SOUND_PCM_WRITE_FILTER:
+ CS_DBGOUT(CS_IOCTL, 4,
+ printk("SOUND_PCM_WRITE_FILTER:\n"));
+ break;
+ case SNDCTL_DSP_SETSYNCRO:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_SETSYNCRO:\n"));
+ break;
+ case SOUND_PCM_READ_FILTER:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_PCM_READ_FILTER:\n"));
+ break;
+ case SOUND_MIXER_PRIVATE1:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_MIXER_PRIVATE1:\n"));
+ break;
+ case SOUND_MIXER_PRIVATE2:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_MIXER_PRIVATE2:\n"));
+ break;
+ case SOUND_MIXER_PRIVATE3:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_MIXER_PRIVATE3:\n"));
+ break;
+ case SOUND_MIXER_PRIVATE4:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_MIXER_PRIVATE4:\n"));
+ break;
+ case SOUND_MIXER_PRIVATE5:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_MIXER_PRIVATE5:\n"));
+ break;
+ case SOUND_MIXER_INFO:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_MIXER_INFO:\n"));
+ break;
+ case SOUND_OLD_MIXER_INFO:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_OLD_MIXER_INFO:\n"));
+ break;
+
+ default:
+ switch (_IOC_NR(x)) {
+ case SOUND_MIXER_VOLUME:
+ CS_DBGOUT(CS_IOCTL, 4,
+ printk("SOUND_MIXER_VOLUME:\n"));
+ break;
+ case SOUND_MIXER_SPEAKER:
+ CS_DBGOUT(CS_IOCTL, 4,
+ printk("SOUND_MIXER_SPEAKER:\n"));
+ break;
+ case SOUND_MIXER_RECLEV:
+ CS_DBGOUT(CS_IOCTL, 4,
+ printk("SOUND_MIXER_RECLEV:\n"));
+ break;
+ case SOUND_MIXER_MIC:
+ CS_DBGOUT(CS_IOCTL, 4,
+ printk("SOUND_MIXER_MIC:\n"));
+ break;
+ case SOUND_MIXER_SYNTH:
+ CS_DBGOUT(CS_IOCTL, 4,
+ printk("SOUND_MIXER_SYNTH:\n"));
+ break;
+ case SOUND_MIXER_RECSRC:
+ CS_DBGOUT(CS_IOCTL, 4,
+ printk("SOUND_MIXER_RECSRC:\n"));
+ break;
+ case SOUND_MIXER_DEVMASK:
+ CS_DBGOUT(CS_IOCTL, 4,
+ printk("SOUND_MIXER_DEVMASK:\n"));
+ break;
+ case SOUND_MIXER_RECMASK:
+ CS_DBGOUT(CS_IOCTL, 4,
+ printk("SOUND_MIXER_RECMASK:\n"));
+ break;
+ case SOUND_MIXER_STEREODEVS:
+ CS_DBGOUT(CS_IOCTL, 4,
+ printk("SOUND_MIXER_STEREODEVS:\n"));
+ break;
+ case SOUND_MIXER_CAPS:
+ CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_MIXER_CAPS:\n"));
+ break;
+ default:
+ i = _IOC_NR(x);
+ if (i >= SOUND_MIXER_NRDEVICES
+ || !(vidx = mixtable1[i])) {
+ CS_DBGOUT(CS_IOCTL, 4, printk
+ ("UNKNOWN IOCTL: 0x%.8x NR=%d\n",
+ x, i));
+ } else {
+ CS_DBGOUT(CS_IOCTL, 4, printk
+ ("SOUND_MIXER_IOCTL AC9x: 0x%.8x NR=%d\n",
+ x, i));
+ }
+ break;
+ }
+ }
+}
+#endif
+
+
+static int ser_init(struct cs4297a_state *s)
+{
+ int i;
+
+ CS_DBGOUT(CS_INIT, 2,
+ printk(KERN_INFO "cs4297a: Setting up serial parameters\n"));
+
+ out64(M_SYNCSER_CMD_RX_RESET | M_SYNCSER_CMD_TX_RESET, SS_CSR(R_SER_CMD));
+
+ out64(M_SYNCSER_MSB_FIRST, SS_CSR(R_SER_MODE));
+ out64(32, SS_CSR(R_SER_MINFRM_SZ));
+ out64(32, SS_CSR(R_SER_MAXFRM_SZ));
+
+ out64(1, SS_CSR(R_SER_TX_RD_THRSH));
+ out64(4, SS_CSR(R_SER_TX_WR_THRSH));
+ out64(8, SS_CSR(R_SER_RX_RD_THRSH));
+
+ /* This looks good from experimentation */
+ out64((M_SYNCSER_TXSYNC_INT | V_SYNCSER_TXSYNC_DLY(0) | M_SYNCSER_TXCLK_EXT |
+ M_SYNCSER_RXSYNC_INT | V_SYNCSER_RXSYNC_DLY(1) | M_SYNCSER_RXCLK_EXT | M_SYNCSER_RXSYNC_EDGE),
+ SS_CSR(R_SER_LINE_MODE));
+
+ /* This looks good from experimentation */
+ out64(V_SYNCSER_SEQ_COUNT(14) | M_SYNCSER_SEQ_ENABLE | M_SYNCSER_SEQ_STROBE,
+ SS_TXTBL(0));
+ out64(V_SYNCSER_SEQ_COUNT(15) | M_SYNCSER_SEQ_ENABLE | M_SYNCSER_SEQ_BYTE,
+ SS_TXTBL(1));
+ out64(V_SYNCSER_SEQ_COUNT(13) | M_SYNCSER_SEQ_ENABLE | M_SYNCSER_SEQ_BYTE,
+ SS_TXTBL(2));
+ out64(V_SYNCSER_SEQ_COUNT( 0) | M_SYNCSER_SEQ_ENABLE |
+ M_SYNCSER_SEQ_STROBE | M_SYNCSER_SEQ_LAST, SS_TXTBL(3));
+
+ out64(V_SYNCSER_SEQ_COUNT(14) | M_SYNCSER_SEQ_ENABLE | M_SYNCSER_SEQ_STROBE,
+ SS_RXTBL(0));
+ out64(V_SYNCSER_SEQ_COUNT(15) | M_SYNCSER_SEQ_ENABLE | M_SYNCSER_SEQ_BYTE,
+ SS_RXTBL(1));
+ out64(V_SYNCSER_SEQ_COUNT(13) | M_SYNCSER_SEQ_ENABLE | M_SYNCSER_SEQ_BYTE,
+ SS_RXTBL(2));
+ out64(V_SYNCSER_SEQ_COUNT( 0) | M_SYNCSER_SEQ_ENABLE | M_SYNCSER_SEQ_STROBE |
+ M_SYNCSER_SEQ_LAST, SS_RXTBL(3));
+
+ for (i=4; i<16; i++) {
+ /* Just in case... */
+ out64(M_SYNCSER_SEQ_LAST, SS_TXTBL(i));
+ out64(M_SYNCSER_SEQ_LAST, SS_RXTBL(i));
+ }
+
+ return 0;
+}
+
+static int init_serdma(serdma_t *dma)
+{
+ CS_DBGOUT(CS_INIT, 2,
+ printk(KERN_ERR "cs4297a: desc - %d sbufsize - %d dbufsize - %d\n",
+ DMA_DESCR, SAMPLE_BUF_SIZE, DMA_BUF_SIZE));
+
+ /* Descriptors */
+ dma->ringsz = DMA_DESCR;
+ dma->descrtab = kmalloc(dma->ringsz * sizeof(serdma_descr_t), GFP_KERNEL);
+ if (!dma->descrtab) {
+ printk(KERN_ERR "cs4297a: kmalloc descrtab failed\n");
+ return -1;
+ }
+ memset(dma->descrtab, 0, dma->ringsz * sizeof(serdma_descr_t));
+ dma->descrtab_end = dma->descrtab + dma->ringsz;
+ /* XXX bloddy mess, use proper DMA API here ... */
+ dma->descrtab_phys = PHYSADDR((int)dma->descrtab);
+ dma->descr_add = dma->descr_rem = dma->descrtab;
+
+ /* Frame buffer area */
+ dma->dma_buf = kmalloc(DMA_BUF_SIZE, GFP_KERNEL);
+ if (!dma->dma_buf) {
+ printk(KERN_ERR "cs4297a: kmalloc dma_buf failed\n");
+ kfree(dma->descrtab);
+ return -1;
+ }
+ memset(dma->dma_buf, 0, DMA_BUF_SIZE);
+ dma->dma_buf_phys = PHYSADDR((int)dma->dma_buf);
+
+ /* Samples buffer area */
+ dma->sbufsz = SAMPLE_BUF_SIZE;
+ dma->sample_buf = kmalloc(dma->sbufsz, GFP_KERNEL);
+ if (!dma->sample_buf) {
+ printk(KERN_ERR "cs4297a: kmalloc sample_buf failed\n");
+ kfree(dma->descrtab);
+ kfree(dma->dma_buf);
+ return -1;
+ }
+ dma->sb_swptr = dma->sb_hwptr = dma->sample_buf;
+ dma->sb_end = (u16 *)((void *)dma->sample_buf + dma->sbufsz);
+ dma->fragsize = dma->sbufsz >> 1;
+
+ CS_DBGOUT(CS_INIT, 4,
+ printk(KERN_ERR "cs4297a: descrtab - %08x dma_buf - %x sample_buf - %x\n",
+ (int)dma->descrtab, (int)dma->dma_buf,
+ (int)dma->sample_buf));
+
+ return 0;
+}
+
+static int dma_init(struct cs4297a_state *s)
+{
+ int i;
+
+ CS_DBGOUT(CS_INIT, 2,
+ printk(KERN_INFO "cs4297a: Setting up DMA\n"));
+
+ if (init_serdma(&s->dma_adc) ||
+ init_serdma(&s->dma_dac))
+ return -1;
+
+ if (in64(SS_CSR(R_SER_DMA_DSCR_COUNT_RX))||
+ in64(SS_CSR(R_SER_DMA_DSCR_COUNT_TX))) {
+ panic("DMA state corrupted?!");
+ }
+
+ /* Initialize now - the descr/buffer pairings will never
+ change... */
+ for (i=0; i<DMA_DESCR; i++) {
+ s->dma_dac.descrtab[i].descr_a = M_DMA_SERRX_SOP | V_DMA_DSCRA_A_SIZE(1) |
+ (s->dma_dac.dma_buf_phys + i*FRAME_BYTES);
+ s->dma_dac.descrtab[i].descr_b = V_DMA_DSCRB_PKT_SIZE(FRAME_BYTES);
+ s->dma_adc.descrtab[i].descr_a = V_DMA_DSCRA_A_SIZE(1) |
+ (s->dma_adc.dma_buf_phys + i*FRAME_BYTES);
+ s->dma_adc.descrtab[i].descr_b = 0;
+ }
+
+ out64((M_DMA_EOP_INT_EN | V_DMA_INT_PKTCNT(DMA_INT_CNT) |
+ V_DMA_RINGSZ(DMA_DESCR) | M_DMA_TDX_EN),
+ SS_CSR(R_SER_DMA_CONFIG0_RX));
+ out64(M_DMA_L2CA, SS_CSR(R_SER_DMA_CONFIG1_RX));
+ out64(s->dma_adc.descrtab_phys, SS_CSR(R_SER_DMA_DSCR_BASE_RX));
+
+ out64(V_DMA_RINGSZ(DMA_DESCR), SS_CSR(R_SER_DMA_CONFIG0_TX));
+ out64(M_DMA_L2CA | M_DMA_NO_DSCR_UPDT, SS_CSR(R_SER_DMA_CONFIG1_TX));
+ out64(s->dma_dac.descrtab_phys, SS_CSR(R_SER_DMA_DSCR_BASE_TX));
+
+ /* Prep the receive DMA descriptor ring */
+ out64(DMA_DESCR, SS_CSR(R_SER_DMA_DSCR_COUNT_RX));
+
+ out64(M_SYNCSER_DMA_RX_EN | M_SYNCSER_DMA_TX_EN, SS_CSR(R_SER_DMA_ENABLE));
+
+ out64((M_SYNCSER_RX_SYNC_ERR | M_SYNCSER_RX_OVERRUN | M_SYNCSER_RX_EOP_COUNT),
+ SS_CSR(R_SER_INT_MASK));
+
+ /* Enable the rx/tx; let the codec warm up to the sync and
+ start sending good frames before the receive FIFO is
+ enabled */
+ out64(M_SYNCSER_CMD_TX_EN, SS_CSR(R_SER_CMD));
+ udelay(1000);
+ out64(M_SYNCSER_CMD_RX_EN | M_SYNCSER_CMD_TX_EN, SS_CSR(R_SER_CMD));
+
+ /* XXXKW is this magic? (the "1" part) */
+ while ((in64(SS_CSR(R_SER_STATUS)) & 0xf1) != 1)
+ ;
+
+ CS_DBGOUT(CS_INIT, 4,
+ printk(KERN_INFO "cs4297a: status: %08x\n",
+ (unsigned int)(in64(SS_CSR(R_SER_STATUS)) & 0xffffffff)));
+
+ return 0;
+}
+
+static int serdma_reg_access(struct cs4297a_state *s, u64 data)
+{
+ serdma_t *d = &s->dma_dac;
+ u64 *data_p;
+ unsigned swptr;
+ int flags;
+ serdma_descr_t *descr;
+
+ if (s->reg_request) {
+ printk(KERN_ERR "cs4297a: attempt to issue multiple reg_access\n");
+ return -1;
+ }
+
+ if (s->ena & FMODE_WRITE) {
+ /* Since a writer has the DSP open, we have to mux the
+ request in */
+ s->reg_request = data;
+ interruptible_sleep_on(&s->dma_dac.reg_wait);
+ /* XXXKW how can I deal with the starvation case where
+ the opener isn't writing? */
+ } else {
+ /* Be safe when changing ring pointers */
+ spin_lock_irqsave(&s->lock, flags);
+ if (d->hwptr != d->swptr) {
+ printk(KERN_ERR "cs4297a: reg access found bookkeeping error (hw/sw = %d/%d\n",
+ d->hwptr, d->swptr);
+ spin_unlock_irqrestore(&s->lock, flags);
+ return -1;
+ }
+ swptr = d->swptr;
+ d->hwptr = d->swptr = (d->swptr + 1) % d->ringsz;
+ spin_unlock_irqrestore(&s->lock, flags);
+
+ descr = &d->descrtab[swptr];
+ data_p = &d->dma_buf[swptr * 4];
+ *data_p = data;
+ out64(1, SS_CSR(R_SER_DMA_DSCR_COUNT_TX));
+ CS_DBGOUT(CS_DESCR, 4,
+ printk(KERN_INFO "cs4297a: add_tx %p (%x -> %x)\n",
+ data_p, swptr, d->hwptr));
+ }
+
+ CS_DBGOUT(CS_FUNCTION, 6,
+ printk(KERN_INFO "cs4297a: serdma_reg_access()-\n"));
+
+ return 0;
+}
+
+//****************************************************************************
+// "cs4297a_read_ac97" -- Reads an AC97 register
+//****************************************************************************
+static int cs4297a_read_ac97(struct cs4297a_state *s, u32 offset,
+ u32 * value)
+{
+ CS_DBGOUT(CS_AC97, 1,
+ printk(KERN_INFO "cs4297a: read reg %2x\n", offset));
+ if (serdma_reg_access(s, (0xCLL << 60) | (1LL << 47) | ((u64)(offset & 0x7F) << 40)))
+ return -1;
+
+ interruptible_sleep_on(&s->dma_adc.reg_wait);
+ *value = s->read_value;
+ CS_DBGOUT(CS_AC97, 2,
+ printk(KERN_INFO "cs4297a: rdr reg %x -> %x\n", s->read_reg, s->read_value));
+
+ return 0;
+}
+
+
+//****************************************************************************
+// "cs4297a_write_ac97()"-- writes an AC97 register
+//****************************************************************************
+static int cs4297a_write_ac97(struct cs4297a_state *s, u32 offset,
+ u32 value)
+{
+ CS_DBGOUT(CS_AC97, 1,
+ printk(KERN_INFO "cs4297a: write reg %2x -> %04x\n", offset, value));
+ return (serdma_reg_access(s, (0xELL << 60) | ((u64)(offset & 0x7F) << 40) | ((value & 0xffff) << 12)));
+}
+
+static void stop_dac(struct cs4297a_state *s)
+{
+ unsigned long flags;
+
+ CS_DBGOUT(CS_WAVE_WRITE, 3, printk(KERN_INFO "cs4297a: stop_dac():\n"));
+ spin_lock_irqsave(&s->lock, flags);
+ s->ena &= ~FMODE_WRITE;
+#if 0
+ /* XXXKW what do I really want here? My theory for now is
+ that I just flip the "ena" bit, and the interrupt handler
+ will stop processing the xmit channel */
+ out64((s->ena & FMODE_READ) ? M_SYNCSER_DMA_RX_EN : 0,
+ SS_CSR(R_SER_DMA_ENABLE));
+#endif
+
+ spin_unlock_irqrestore(&s->lock, flags);
+}
+
+
+static void start_dac(struct cs4297a_state *s)
+{
+ unsigned long flags;
+
+ CS_DBGOUT(CS_FUNCTION, 3, printk(KERN_INFO "cs4297a: start_dac()+\n"));
+ spin_lock_irqsave(&s->lock, flags);
+ if (!(s->ena & FMODE_WRITE) && (s->dma_dac.mapped ||
+ (s->dma_dac.count > 0
+ && s->dma_dac.ready))) {
+ s->ena |= FMODE_WRITE;
+ /* XXXKW what do I really want here? My theory for
+ now is that I just flip the "ena" bit, and the
+ interrupt handler will start processing the xmit
+ channel */
+
+ CS_DBGOUT(CS_WAVE_WRITE | CS_PARMS, 8, printk(KERN_INFO
+ "cs4297a: start_dac(): start dma\n"));
+
+ }
+ spin_unlock_irqrestore(&s->lock, flags);
+ CS_DBGOUT(CS_FUNCTION, 3,
+ printk(KERN_INFO "cs4297a: start_dac()-\n"));
+}
+
+
+static void stop_adc(struct cs4297a_state *s)
+{
+ unsigned long flags;
+
+ CS_DBGOUT(CS_FUNCTION, 3,
+ printk(KERN_INFO "cs4297a: stop_adc()+\n"));
+
+ spin_lock_irqsave(&s->lock, flags);
+ s->ena &= ~FMODE_READ;
+
+ if (s->conversion == 1) {
+ s->conversion = 0;
+ s->prop_adc.fmt = s->prop_adc.fmt_original;
+ }
+ /* Nothing to do really, I need to keep the DMA going
+ XXXKW when do I get here, and is there more I should do? */
+ spin_unlock_irqrestore(&s->lock, flags);
+ CS_DBGOUT(CS_FUNCTION, 3,
+ printk(KERN_INFO "cs4297a: stop_adc()-\n"));
+}
+
+
+static void start_adc(struct cs4297a_state *s)
+{
+ unsigned long flags;
+
+ CS_DBGOUT(CS_FUNCTION, 2,
+ printk(KERN_INFO "cs4297a: start_adc()+\n"));
+
+ if (!(s->ena & FMODE_READ) &&
+ (s->dma_adc.mapped || s->dma_adc.count <=
+ (signed) (s->dma_adc.sbufsz - 2 * s->dma_adc.fragsize))
+ && s->dma_adc.ready) {
+ if (s->prop_adc.fmt & AFMT_S8 || s->prop_adc.fmt & AFMT_U8) {
+ //
+ // now only use 16 bit capture, due to truncation issue
+ // in the chip, noticable distortion occurs.
+ // allocate buffer and then convert from 16 bit to
+ // 8 bit for the user buffer.
+ //
+ s->prop_adc.fmt_original = s->prop_adc.fmt;
+ if (s->prop_adc.fmt & AFMT_S8) {
+ s->prop_adc.fmt &= ~AFMT_S8;
+ s->prop_adc.fmt |= AFMT_S16_LE;
+ }
+ if (s->prop_adc.fmt & AFMT_U8) {
+ s->prop_adc.fmt &= ~AFMT_U8;
+ s->prop_adc.fmt |= AFMT_U16_LE;
+ }
+ //
+ // prog_dmabuf_adc performs a stop_adc() but that is
+ // ok since we really haven't started the DMA yet.
+ //
+ prog_codec(s, CS_TYPE_ADC);
+
+ prog_dmabuf_adc(s);
+ s->conversion = 1;
+ }
+ spin_lock_irqsave(&s->lock, flags);
+ s->ena |= FMODE_READ;
+ /* Nothing to do really, I am probably already
+ DMAing... XXXKW when do I get here, and is there
+ more I should do? */
+ spin_unlock_irqrestore(&s->lock, flags);
+
+ CS_DBGOUT(CS_PARMS, 6, printk(KERN_INFO
+ "cs4297a: start_adc(): start adc\n"));
+ }
+ CS_DBGOUT(CS_FUNCTION, 2,
+ printk(KERN_INFO "cs4297a: start_adc()-\n"));
+
+}
+
+
+// call with spinlock held!
+static void cs4297a_update_ptr(struct cs4297a_state *s, int intflag)
+{
+ int good_diff, diff, diff2;
+ u64 *data_p, data;
+ u32 *s_ptr;
+ unsigned hwptr;
+ u32 status;
+ serdma_t *d;
+ serdma_descr_t *descr;
+
+ // update ADC pointer
+ status = intflag ? in64(SS_CSR(R_SER_STATUS)) : 0;
+
+ if ((s->ena & FMODE_READ) || (status & (M_SYNCSER_RX_EOP_COUNT))) {
+ d = &s->dma_adc;
+ hwptr = (unsigned) (((in64(SS_CSR(R_SER_DMA_CUR_DSCR_ADDR_RX)) & M_DMA_CURDSCR_ADDR) -
+ d->descrtab_phys) / sizeof(serdma_descr_t));
+
+ if (s->ena & FMODE_READ) {
+ CS_DBGOUT(CS_FUNCTION, 2,
+ printk(KERN_INFO "cs4297a: upd_rcv sw->hw->hw %x/%x/%x (int-%d)n",
+ d->swptr, d->hwptr, hwptr, intflag));
+ /* Number of DMA buffers available for software: */
+ diff2 = diff = (d->ringsz + hwptr - d->hwptr) % d->ringsz;
+ d->hwptr = hwptr;
+ good_diff = 0;
+ s_ptr = (u32 *)&(d->dma_buf[d->swptr*4]);
+ descr = &d->descrtab[d->swptr];
+ while (diff2--) {
+ u64 data = *(u64 *)s_ptr;
+ u64 descr_a;
+ u16 left, right;
+ descr_a = descr->descr_a;
+ descr->descr_a &= ~M_DMA_SERRX_SOP;
+ if ((descr_a & M_DMA_DSCRA_A_ADDR) != PHYSADDR((int)s_ptr)) {
+ printk(KERN_ERR "cs4297a: RX Bad address (read)\n");
+ }
+ if (((data & 0x9800000000000000) != 0x9800000000000000) ||
+ (!(descr_a & M_DMA_SERRX_SOP)) ||
+ (G_DMA_DSCRB_PKT_SIZE(descr->descr_b) != FRAME_BYTES)) {
+ s->stats.rx_bad++;
+ printk(KERN_DEBUG "cs4297a: RX Bad attributes (read)\n");
+ continue;
+ }
+ s->stats.rx_good++;
+ if ((data >> 61) == 7) {
+ s->read_value = (data >> 12) & 0xffff;
+ s->read_reg = (data >> 40) & 0x7f;
+ wake_up(&d->reg_wait);
+ }
+ if (d->count && (d->sb_hwptr == d->sb_swptr)) {
+ s->stats.rx_overflow++;
+ printk(KERN_DEBUG "cs4297a: RX overflow\n");
+ continue;
+ }
+ good_diff++;
+ left = ((s_ptr[1] & 0xff) << 8) | ((s_ptr[2] >> 24) & 0xff);
+ right = (s_ptr[2] >> 4) & 0xffff;
+ *d->sb_hwptr++ = left;
+ *d->sb_hwptr++ = right;
+ if (d->sb_hwptr == d->sb_end)
+ d->sb_hwptr = d->sample_buf;
+ descr++;
+ if (descr == d->descrtab_end) {
+ descr = d->descrtab;
+ s_ptr = (u32 *)s->dma_adc.dma_buf;
+ } else {
+ s_ptr += 8;
+ }
+ }
+ d->total_bytes += good_diff * FRAME_SAMPLE_BYTES;
+ d->count += good_diff * FRAME_SAMPLE_BYTES;
+ if (d->count > d->sbufsz) {
+ printk(KERN_ERR "cs4297a: bogus receive overflow!!\n");
+ }
+ d->swptr = (d->swptr + diff) % d->ringsz;
+ out64(diff, SS_CSR(R_SER_DMA_DSCR_COUNT_RX));
+ if (d->mapped) {
+ if (d->count >= (signed) d->fragsize)
+ wake_up(&d->wait);
+ } else {
+ if (d->count > 0) {
+ CS_DBGOUT(CS_WAVE_READ, 4,
+ printk(KERN_INFO
+ "cs4297a: update count -> %d\n", d->count));
+ wake_up(&d->wait);
+ }
+ }
+ } else {
+ /* Receive is going even if no one is
+ listening (for register accesses and to
+ avoid FIFO overrun) */
+ diff2 = diff = (hwptr + d->ringsz - d->hwptr) % d->ringsz;
+ if (!diff) {
+ printk(KERN_ERR "cs4297a: RX full or empty?\n");
+ }
+
+ descr = &d->descrtab[d->swptr];
+ data_p = &d->dma_buf[d->swptr*4];
+
+ /* Force this to happen at least once; I got
+ here because of an interrupt, so there must
+ be a buffer to process. */
+ do {
+ data = *data_p;
+ if ((descr->descr_a & M_DMA_DSCRA_A_ADDR) != PHYSADDR((int)data_p)) {
+ printk(KERN_ERR "cs4297a: RX Bad address %d (%x %x)\n", d->swptr,
+ (int)(descr->descr_a & M_DMA_DSCRA_A_ADDR),
+ (int)PHYSADDR((int)data_p));
+ }
+ if (!(data & (1LL << 63)) ||
+ !(descr->descr_a & M_DMA_SERRX_SOP) ||
+ (G_DMA_DSCRB_PKT_SIZE(descr->descr_b) != FRAME_BYTES)) {
+ s->stats.rx_bad++;
+ printk(KERN_DEBUG "cs4297a: RX Bad attributes\n");
+ } else {
+ s->stats.rx_good++;
+ if ((data >> 61) == 7) {
+ s->read_value = (data >> 12) & 0xffff;
+ s->read_reg = (data >> 40) & 0x7f;
+ wake_up(&d->reg_wait);
+ }
+ }
+ descr->descr_a &= ~M_DMA_SERRX_SOP;
+ descr++;
+ d->swptr++;
+ data_p += 4;
+ if (descr == d->descrtab_end) {
+ descr = d->descrtab;
+ d->swptr = 0;
+ data_p = d->dma_buf;
+ }
+ out64(1, SS_CSR(R_SER_DMA_DSCR_COUNT_RX));
+ } while (--diff);
+ d->hwptr = hwptr;
+
+ CS_DBGOUT(CS_DESCR, 6,
+ printk(KERN_INFO "cs4297a: hw/sw %x/%x\n", d->hwptr, d->swptr));
+ }
+
+ CS_DBGOUT(CS_PARMS, 8, printk(KERN_INFO
+ "cs4297a: cs4297a_update_ptr(): s=0x%.8x hwptr=%d total_bytes=%d count=%d \n",
+ (unsigned)s, d->hwptr,
+ d->total_bytes, d->count));
+ }
+
+ /* XXXKW worry about s->reg_request -- there is a starvation
+ case if s->ena has FMODE_WRITE on, but the client isn't
+ doing writes */
+
+ // update DAC pointer
+ //
+ // check for end of buffer, means that we are going to wait for another interrupt
+ // to allow silence to fill the fifos on the part, to keep pops down to a minimum.
+ //
+ if (s->ena & FMODE_WRITE) {
+ serdma_t *d = &s->dma_dac;
+ hwptr = (unsigned) (((in64(SS_CSR(R_SER_DMA_CUR_DSCR_ADDR_TX)) & M_DMA_CURDSCR_ADDR) -
+ d->descrtab_phys) / sizeof(serdma_descr_t));
+ diff = (d->ringsz + hwptr - d->hwptr) % d->ringsz;
+ CS_DBGOUT(CS_WAVE_WRITE, 4, printk(KERN_INFO
+ "cs4297a: cs4297a_update_ptr(): hw/hw/sw %x/%x/%x diff %d count %d\n",
+ d->hwptr, hwptr, d->swptr, diff, d->count));
+ d->hwptr = hwptr;
+ /* XXXKW stereo? conversion? Just assume 2 16-bit samples for now */
+ d->total_bytes += diff * FRAME_SAMPLE_BYTES;
+ if (d->mapped) {
+ d->count += diff * FRAME_SAMPLE_BYTES;
+ if (d->count >= d->fragsize) {
+ d->wakeup = 1;
+ wake_up(&d->wait);
+ if (d->count > d->sbufsz)
+ d->count &= d->sbufsz - 1;
+ }
+ } else {
+ d->count -= diff * FRAME_SAMPLE_BYTES;
+ if (d->count <= 0) {
+ //
+ // fill with silence, and do not shut down the DAC.
+ // Continue to play silence until the _release.
+ //
+ CS_DBGOUT(CS_WAVE_WRITE, 6, printk(KERN_INFO
+ "cs4297a: cs4297a_update_ptr(): memset %d at 0x%.8x for %d size \n",
+ (unsigned)(s->prop_dac.fmt &
+ (AFMT_U8 | AFMT_U16_LE)) ? 0x80 : 0,
+ (unsigned)d->dma_buf,
+ d->ringsz));
+ memset(d->dma_buf, 0, d->ringsz * FRAME_BYTES);
+ if (d->count < 0) {
+ d->underrun = 1;
+ s->stats.tx_underrun++;
+ d->count = 0;
+ CS_DBGOUT(CS_ERROR, 9, printk(KERN_INFO
+ "cs4297a: cs4297a_update_ptr(): underrun\n"));
+ }
+ } else if (d->count <=
+ (signed) d->fragsize
+ && !d->endcleared) {
+ /* XXXKW what is this for? */
+ clear_advance(d->dma_buf,
+ d->sbufsz,
+ d->swptr,
+ d->fragsize,
+ 0);
+ d->endcleared = 1;
+ }
+ if ( (d->count <= (signed) d->sbufsz/2) || intflag)
+ {
+ CS_DBGOUT(CS_WAVE_WRITE, 4,
+ printk(KERN_INFO
+ "cs4297a: update count -> %d\n", d->count));
+ wake_up(&d->wait);
+ }
+ }
+ CS_DBGOUT(CS_PARMS, 8, printk(KERN_INFO
+ "cs4297a: cs4297a_update_ptr(): s=0x%.8x hwptr=%d total_bytes=%d count=%d \n",
+ (unsigned) s, d->hwptr,
+ d->total_bytes, d->count));
+ }
+}
+
+static int mixer_ioctl(struct cs4297a_state *s, unsigned int cmd,
+ unsigned long arg)
+{
+ // Index to mixer_src[] is value of AC97 Input Mux Select Reg.
+ // Value of array member is recording source Device ID Mask.
+ static const unsigned int mixer_src[8] = {
+ SOUND_MASK_MIC, SOUND_MASK_CD, 0, SOUND_MASK_LINE1,
+ SOUND_MASK_LINE, SOUND_MASK_VOLUME, 0, 0
+ };
+
+ // Index of mixtable1[] member is Device ID
+ // and must be <= SOUND_MIXER_NRDEVICES.
+ // Value of array member is index into s->mix.vol[]
+ static const unsigned char mixtable1[SOUND_MIXER_NRDEVICES] = {
+ [SOUND_MIXER_PCM] = 1, // voice
+ [SOUND_MIXER_LINE1] = 2, // AUX
+ [SOUND_MIXER_CD] = 3, // CD
+ [SOUND_MIXER_LINE] = 4, // Line
+ [SOUND_MIXER_SYNTH] = 5, // FM
+ [SOUND_MIXER_MIC] = 6, // Mic
+ [SOUND_MIXER_SPEAKER] = 7, // Speaker
+ [SOUND_MIXER_RECLEV] = 8, // Recording level
+ [SOUND_MIXER_VOLUME] = 9 // Master Volume
+ };
+
+ static const unsigned mixreg[] = {
+ AC97_PCMOUT_VOL,
+ AC97_AUX_VOL,
+ AC97_CD_VOL,
+ AC97_LINEIN_VOL
+ };
+ unsigned char l, r, rl, rr, vidx;
+ unsigned char attentbl[11] =
+ { 63, 42, 26, 17, 14, 11, 8, 6, 4, 2, 0 };
+ unsigned temp1;
+ int i, val;
+
+ VALIDATE_STATE(s);
+ CS_DBGOUT(CS_FUNCTION, 4, printk(KERN_INFO
+ "cs4297a: mixer_ioctl(): s=0x%.8x cmd=0x%.8x\n",
+ (unsigned) s, cmd));
+#if CSDEBUG
+ cs_printioctl(cmd);
+#endif
+#if CSDEBUG_INTERFACE
+
+ if ((cmd == SOUND_MIXER_CS_GETDBGMASK) ||
+ (cmd == SOUND_MIXER_CS_SETDBGMASK) ||
+ (cmd == SOUND_MIXER_CS_GETDBGLEVEL) ||
+ (cmd == SOUND_MIXER_CS_SETDBGLEVEL))
+ {
+ switch (cmd) {
+
+ case SOUND_MIXER_CS_GETDBGMASK:
+ return put_user(cs_debugmask,
+ (unsigned long *) arg);
+
+ case SOUND_MIXER_CS_GETDBGLEVEL:
+ return put_user(cs_debuglevel,
+ (unsigned long *) arg);
+
+ case SOUND_MIXER_CS_SETDBGMASK:
+ if (get_user(val, (unsigned long *) arg))
+ return -EFAULT;
+ cs_debugmask = val;
+ return 0;
+
+ case SOUND_MIXER_CS_SETDBGLEVEL:
+ if (get_user(val, (unsigned long *) arg))
+ return -EFAULT;
+ cs_debuglevel = val;
+ return 0;
+ default:
+ CS_DBGOUT(CS_ERROR, 1, printk(KERN_INFO
+ "cs4297a: mixer_ioctl(): ERROR unknown debug cmd\n"));
+ return 0;
+ }
+ }
+#endif
+
+ if (cmd == SOUND_MIXER_PRIVATE1) {
+ return -EINVAL;
+ }
+ if (cmd == SOUND_MIXER_PRIVATE2) {
+ // enable/disable/query spatializer
+ if (get_user(val, (int *) arg))
+ return -EFAULT;
+ if (val != -1) {
+ temp1 = (val & 0x3f) >> 2;
+ cs4297a_write_ac97(s, AC97_3D_CONTROL, temp1);
+ cs4297a_read_ac97(s, AC97_GENERAL_PURPOSE,
+ &temp1);
+ cs4297a_write_ac97(s, AC97_GENERAL_PURPOSE,
+ temp1 | 0x2000);
+ }
+ cs4297a_read_ac97(s, AC97_3D_CONTROL, &temp1);
+ return put_user((temp1 << 2) | 3, (int *) arg);
+ }
+ if (cmd == SOUND_MIXER_INFO) {
+ mixer_info info;
+ strncpy(info.id, "CS4297a", sizeof(info.id));
+ strncpy(info.name, "Crystal CS4297a", sizeof(info.name));
+ info.modify_counter = s->mix.modcnt;
+ if (copy_to_user((void *) arg, &info, sizeof(info)))
+ return -EFAULT;
+ return 0;
+ }
+ if (cmd == SOUND_OLD_MIXER_INFO) {
+ _old_mixer_info info;
+ strncpy(info.id, "CS4297a", sizeof(info.id));
+ strncpy(info.name, "Crystal CS4297a", sizeof(info.name));
+ if (copy_to_user((void *) arg, &info, sizeof(info)))
+ return -EFAULT;
+ return 0;
+ }
+ if (cmd == OSS_GETVERSION)
+ return put_user(SOUND_VERSION, (int *) arg);
+
+ if (_IOC_TYPE(cmd) != 'M' || _SIOC_SIZE(cmd) != sizeof(int))
+ return -EINVAL;
+
+ // If ioctl has only the SIOC_READ bit(bit 31)
+ // on, process the only-read commands.
+ if (_SIOC_DIR(cmd) == _SIOC_READ) {
+ switch (_IOC_NR(cmd)) {
+ case SOUND_MIXER_RECSRC: // Arg contains a bit for each recording source
+ cs4297a_read_ac97(s, AC97_RECORD_SELECT,
+ &temp1);
+ return put_user(mixer_src[temp1 & 7], (int *) arg);
+
+ case SOUND_MIXER_DEVMASK: // Arg contains a bit for each supported device
+ return put_user(SOUND_MASK_PCM | SOUND_MASK_LINE |
+ SOUND_MASK_VOLUME | SOUND_MASK_RECLEV,
+ (int *) arg);
+
+ case SOUND_MIXER_RECMASK: // Arg contains a bit for each supported recording source
+ return put_user(SOUND_MASK_LINE | SOUND_MASK_VOLUME,
+ (int *) arg);
+
+ case SOUND_MIXER_STEREODEVS: // Mixer channels supporting stereo
+ return put_user(SOUND_MASK_PCM | SOUND_MASK_LINE |
+ SOUND_MASK_VOLUME | SOUND_MASK_RECLEV,
+ (int *) arg);
+
+ case SOUND_MIXER_CAPS:
+ return put_user(SOUND_CAP_EXCL_INPUT, (int *) arg);
+
+ default:
+ i = _IOC_NR(cmd);
+ if (i >= SOUND_MIXER_NRDEVICES
+ || !(vidx = mixtable1[i]))
+ return -EINVAL;
+ return put_user(s->mix.vol[vidx - 1], (int *) arg);
+ }
+ }
+ // If ioctl doesn't have both the SIOC_READ and
+ // the SIOC_WRITE bit set, return invalid.
+ if (_SIOC_DIR(cmd) != (_SIOC_READ | _SIOC_WRITE))
+ return -EINVAL;
+
+ // Increment the count of volume writes.
+ s->mix.modcnt++;
+
+ // Isolate the command; it must be a write.
+ switch (_IOC_NR(cmd)) {
+
+ case SOUND_MIXER_RECSRC: // Arg contains a bit for each recording source
+ if (get_user(val, (int *) arg))
+ return -EFAULT;
+ i = hweight32(val); // i = # bits on in val.
+ if (i != 1) // One & only 1 bit must be on.
+ return 0;
+ for (i = 0; i < sizeof(mixer_src) / sizeof(int); i++) {
+ if (val == mixer_src[i]) {
+ temp1 = (i << 8) | i;
+ cs4297a_write_ac97(s,
+ AC97_RECORD_SELECT,
+ temp1);
+ return 0;
+ }
+ }
+ return 0;
+
+ case SOUND_MIXER_VOLUME:
+ if (get_user(val, (int *) arg))
+ return -EFAULT;
+ l = val & 0xff;
+ if (l > 100)
+ l = 100; // Max soundcard.h vol is 100.
+ if (l < 6) {
+ rl = 63;
+ l = 0;
+ } else
+ rl = attentbl[(10 * l) / 100]; // Convert 0-100 vol to 63-0 atten.
+
+ r = (val >> 8) & 0xff;
+ if (r > 100)
+ r = 100; // Max right volume is 100, too
+ if (r < 6) {
+ rr = 63;
+ r = 0;
+ } else
+ rr = attentbl[(10 * r) / 100]; // Convert volume to attenuation.
+
+ if ((rl > 60) && (rr > 60)) // If both l & r are 'low',
+ temp1 = 0x8000; // turn on the mute bit.
+ else
+ temp1 = 0;
+
+ temp1 |= (rl << 8) | rr;
+
+ cs4297a_write_ac97(s, AC97_MASTER_VOL_STEREO, temp1);
+ cs4297a_write_ac97(s, AC97_PHONE_VOL, temp1);
+
+#ifdef OSS_DOCUMENTED_MIXER_SEMANTICS
+ s->mix.vol[8] = ((unsigned int) r << 8) | l;
+#else
+ s->mix.vol[8] = val;
+#endif
+ return put_user(s->mix.vol[8], (int *) arg);
+
+ case SOUND_MIXER_SPEAKER:
+ if (get_user(val, (int *) arg))
+ return -EFAULT;
+ l = val & 0xff;
+ if (l > 100)
+ l = 100;
+ if (l < 3) {
+ rl = 0;
+ l = 0;
+ } else {
+ rl = (l * 2 - 5) / 13; // Convert 0-100 range to 0-15.
+ l = (rl * 13 + 5) / 2;
+ }
+
+ if (rl < 3) {
+ temp1 = 0x8000;
+ rl = 0;
+ } else
+ temp1 = 0;
+ rl = 15 - rl; // Convert volume to attenuation.
+ temp1 |= rl << 1;
+ cs4297a_write_ac97(s, AC97_PCBEEP_VOL, temp1);
+
+#ifdef OSS_DOCUMENTED_MIXER_SEMANTICS
+ s->mix.vol[6] = l << 8;
+#else
+ s->mix.vol[6] = val;
+#endif
+ return put_user(s->mix.vol[6], (int *) arg);
+
+ case SOUND_MIXER_RECLEV:
+ if (get_user(val, (int *) arg))
+ return -EFAULT;
+ l = val & 0xff;
+ if (l > 100)
+ l = 100;
+ r = (val >> 8) & 0xff;
+ if (r > 100)
+ r = 100;
+ rl = (l * 2 - 5) / 13; // Convert 0-100 scale to 0-15.
+ rr = (r * 2 - 5) / 13;
+ if (rl < 3 && rr < 3)
+ temp1 = 0x8000;
+ else
+ temp1 = 0;
+
+ temp1 = temp1 | (rl << 8) | rr;
+ cs4297a_write_ac97(s, AC97_RECORD_GAIN, temp1);
+
+#ifdef OSS_DOCUMENTED_MIXER_SEMANTICS
+ s->mix.vol[7] = ((unsigned int) r << 8) | l;
+#else
+ s->mix.vol[7] = val;
+#endif
+ return put_user(s->mix.vol[7], (int *) arg);
+
+ case SOUND_MIXER_MIC:
+ if (get_user(val, (int *) arg))
+ return -EFAULT;
+ l = val & 0xff;
+ if (l > 100)
+ l = 100;
+ if (l < 1) {
+ l = 0;
+ rl = 0;
+ } else {
+ rl = ((unsigned) l * 5 - 4) / 16; // Convert 0-100 range to 0-31.
+ l = (rl * 16 + 4) / 5;
+ }
+ cs4297a_read_ac97(s, AC97_MIC_VOL, &temp1);
+ temp1 &= 0x40; // Isolate 20db gain bit.
+ if (rl < 3) {
+ temp1 |= 0x8000;
+ rl = 0;
+ }
+ rl = 31 - rl; // Convert volume to attenuation.
+ temp1 |= rl;
+ cs4297a_write_ac97(s, AC97_MIC_VOL, temp1);
+
+#ifdef OSS_DOCUMENTED_MIXER_SEMANTICS
+ s->mix.vol[5] = val << 8;
+#else
+ s->mix.vol[5] = val;
+#endif
+ return put_user(s->mix.vol[5], (int *) arg);
+
+
+ case SOUND_MIXER_SYNTH:
+ if (get_user(val, (int *) arg))
+ return -EFAULT;
+ l = val & 0xff;
+ if (l > 100)
+ l = 100;
+ if (get_user(val, (int *) arg))
+ return -EFAULT;
+ r = (val >> 8) & 0xff;
+ if (r > 100)
+ r = 100;
+ rl = (l * 2 - 11) / 3; // Convert 0-100 range to 0-63.
+ rr = (r * 2 - 11) / 3;
+ if (rl < 3) // If l is low, turn on
+ temp1 = 0x0080; // the mute bit.
+ else
+ temp1 = 0;
+
+ rl = 63 - rl; // Convert vol to attenuation.
+// writel(temp1 | rl, s->pBA0 + FMLVC);
+ if (rr < 3) // If rr is low, turn on
+ temp1 = 0x0080; // the mute bit.
+ else
+ temp1 = 0;
+ rr = 63 - rr; // Convert vol to attenuation.
+// writel(temp1 | rr, s->pBA0 + FMRVC);
+
+#ifdef OSS_DOCUMENTED_MIXER_SEMANTICS
+ s->mix.vol[4] = (r << 8) | l;
+#else
+ s->mix.vol[4] = val;
+#endif
+ return put_user(s->mix.vol[4], (int *) arg);
+
+
+ default:
+ CS_DBGOUT(CS_IOCTL, 4, printk(KERN_INFO
+ "cs4297a: mixer_ioctl(): default\n"));
+
+ i = _IOC_NR(cmd);
+ if (i >= SOUND_MIXER_NRDEVICES || !(vidx = mixtable1[i]))
+ return -EINVAL;
+ if (get_user(val, (int *) arg))
+ return -EFAULT;
+ l = val & 0xff;
+ if (l > 100)
+ l = 100;
+ if (l < 1) {
+ l = 0;
+ rl = 31;
+ } else
+ rl = (attentbl[(l * 10) / 100]) >> 1;
+
+ r = (val >> 8) & 0xff;
+ if (r > 100)
+ r = 100;
+ if (r < 1) {
+ r = 0;
+ rr = 31;
+ } else
+ rr = (attentbl[(r * 10) / 100]) >> 1;
+ if ((rl > 30) && (rr > 30))
+ temp1 = 0x8000;
+ else
+ temp1 = 0;
+ temp1 = temp1 | (rl << 8) | rr;
+ cs4297a_write_ac97(s, mixreg[vidx - 1], temp1);
+
+#ifdef OSS_DOCUMENTED_MIXER_SEMANTICS
+ s->mix.vol[vidx - 1] = ((unsigned int) r << 8) | l;
+#else
+ s->mix.vol[vidx - 1] = val;
+#endif
+ return put_user(s->mix.vol[vidx - 1], (int *) arg);
+ }
+}
+
+
+// ---------------------------------------------------------------------
+
+static loff_t cs4297a_llseek(struct file *file, loff_t offset, int origin)
+{
+ return -ESPIPE;
+}
+
+
+// ---------------------------------------------------------------------
+
+static int cs4297a_open_mixdev(struct inode *inode, struct file *file)
+{
+ int minor = MINOR(inode->i_rdev);
+ struct cs4297a_state *s=NULL;
+ struct list_head *entry;
+
+ CS_DBGOUT(CS_FUNCTION | CS_OPEN, 4,
+ printk(KERN_INFO "cs4297a: cs4297a_open_mixdev()+\n"));
+
+ list_for_each(entry, &cs4297a_devs)
+ {
+ s = list_entry(entry, struct cs4297a_state, list);
+ if(s->dev_mixer == minor)
+ break;
+ }
+ if (!s)
+ {
+ CS_DBGOUT(CS_FUNCTION | CS_OPEN | CS_ERROR, 2,
+ printk(KERN_INFO "cs4297a: cs4297a_open_mixdev()- -ENODEV\n"));
+ return -ENODEV;
+ }
+ VALIDATE_STATE(s);
+ file->private_data = s;
+ MOD_INC_USE_COUNT;
+
+ CS_DBGOUT(CS_FUNCTION | CS_OPEN, 4,
+ printk(KERN_INFO "cs4297a: cs4297a_open_mixdev()- 0\n"));
+
+ return 0;
+}
+
+
+static int cs4297a_release_mixdev(struct inode *inode, struct file *file)
+{
+ struct cs4297a_state *s =
+ (struct cs4297a_state *) file->private_data;
+
+ VALIDATE_STATE(s);
+ MOD_DEC_USE_COUNT;
+ return 0;
+}
+
+
+static int cs4297a_ioctl_mixdev(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ return mixer_ioctl((struct cs4297a_state *) file->private_data, cmd,
+ arg);
+}
+
+
+// ******************************************************************************************
+// Mixer file operations struct.
+// ******************************************************************************************
+static /*const */ struct file_operations cs4297a_mixer_fops = {
+ llseek:cs4297a_llseek,
+ ioctl:cs4297a_ioctl_mixdev,
+ open:cs4297a_open_mixdev,
+ release:cs4297a_release_mixdev,
+};
+
+// ---------------------------------------------------------------------
+
+
+static int drain_adc(struct cs4297a_state *s, int nonblock)
+{
+ /* This routine serves no purpose currently - any samples
+ sitting in the receive queue will just be processed by the
+ background consumer. This would be different if DMA
+ actually stopped when there were no clients. */
+ return 0;
+}
+
+static int drain_dac(struct cs4297a_state *s, int nonblock)
+{
+ DECLARE_WAITQUEUE(wait, current);
+ unsigned long flags;
+ unsigned hwptr;
+ unsigned tmo;
+ int count;
+
+ if (s->dma_dac.mapped)
+ return 0;
+ if (nonblock)
+ return -EBUSY;
+ add_wait_queue(&s->dma_dac.wait, &wait);
+ while ((count = in64(SS_CSR(R_SER_DMA_DSCR_COUNT_TX))) ||
+ (s->dma_dac.count > 0)) {
+ if (!signal_pending(current)) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ /* XXXKW is this calculation working? */
+ tmo = ((count * FRAME_TX_US) * HZ) / 1000000;
+ schedule_timeout(tmo + 1);
+ } else {
+ /* XXXKW do I care if there is a signal pending? */
+ }
+ }
+ spin_lock_irqsave(&s->lock, flags);
+ /* Reset the bookkeeping */
+ hwptr = (int)(((in64(SS_CSR(R_SER_DMA_CUR_DSCR_ADDR_TX)) & M_DMA_CURDSCR_ADDR) -
+ s->dma_dac.descrtab_phys) / sizeof(serdma_descr_t));
+ s->dma_dac.hwptr = s->dma_dac.swptr = hwptr;
+ spin_unlock_irqrestore(&s->lock, flags);
+ remove_wait_queue(&s->dma_dac.wait, &wait);
+ current->state = TASK_RUNNING;
+ return 0;
+}
+
+
+// ---------------------------------------------------------------------
+
+static ssize_t cs4297a_read(struct file *file, char *buffer, size_t count,
+ loff_t * ppos)
+{
+ struct cs4297a_state *s =
+ (struct cs4297a_state *) file->private_data;
+ ssize_t ret;
+ unsigned long flags;
+ int cnt, count_fr, cnt_by;
+ unsigned copied = 0;
+
+ CS_DBGOUT(CS_FUNCTION | CS_WAVE_READ, 2,
+ printk(KERN_INFO "cs4297a: cs4297a_read()+ %d \n", count));
+
+ VALIDATE_STATE(s);
+ if (ppos != &file->f_pos)
+ return -ESPIPE;
+ if (s->dma_adc.mapped)
+ return -ENXIO;
+ if (!s->dma_adc.ready && (ret = prog_dmabuf_adc(s)))
+ return ret;
+ if (!access_ok(VERIFY_WRITE, buffer, count))
+ return -EFAULT;
+ ret = 0;
+//
+// "count" is the amount of bytes to read (from app), is decremented each loop
+// by the amount of bytes that have been returned to the user buffer.
+// "cnt" is the running total of each read from the buffer (changes each loop)
+// "buffer" points to the app's buffer
+// "ret" keeps a running total of the amount of bytes that have been copied
+// to the user buffer.
+// "copied" is the total bytes copied into the user buffer for each loop.
+//
+ while (count > 0) {
+ CS_DBGOUT(CS_WAVE_READ, 8, printk(KERN_INFO
+ "_read() count>0 count=%d .count=%d .swptr=%d .hwptr=%d \n",
+ count, s->dma_adc.count,
+ s->dma_adc.swptr, s->dma_adc.hwptr));
+ spin_lock_irqsave(&s->lock, flags);
+
+ /* cnt will be the number of available samples (16-bit
+ stereo); it starts out as the maxmimum consequetive
+ samples */
+ cnt = (s->dma_adc.sb_end - s->dma_adc.sb_swptr) / 2;
+ count_fr = s->dma_adc.count / FRAME_SAMPLE_BYTES;
+
+ // dma_adc.count is the current total bytes that have not been read.
+ // if the amount of unread bytes from the current sw pointer to the
+ // end of the buffer is greater than the current total bytes that
+ // have not been read, then set the "cnt" (unread bytes) to the
+ // amount of unread bytes.
+
+ if (count_fr < cnt)
+ cnt = count_fr;
+ cnt_by = cnt * FRAME_SAMPLE_BYTES;
+ spin_unlock_irqrestore(&s->lock, flags);
+ //
+ // if we are converting from 8/16 then we need to copy
+ // twice the number of 16 bit bytes then 8 bit bytes.
+ //
+ if (s->conversion) {
+ if (cnt_by > (count * 2)) {
+ cnt = (count * 2) / FRAME_SAMPLE_BYTES;
+ cnt_by = count * 2;
+ }
+ } else {
+ if (cnt_by > count) {
+ cnt = count / FRAME_SAMPLE_BYTES;
+ cnt_by = count;
+ }
+ }
+ //
+ // "cnt" NOW is the smaller of the amount that will be read,
+ // and the amount that is requested in this read (or partial).
+ // if there are no bytes in the buffer to read, then start the
+ // ADC and wait for the interrupt handler to wake us up.
+ //
+ if (cnt <= 0) {
+
+ // start up the dma engine and then continue back to the top of
+ // the loop when wake up occurs.
+ start_adc(s);
+ if (file->f_flags & O_NONBLOCK)
+ return ret ? ret : -EAGAIN;
+ interruptible_sleep_on(&s->dma_adc.wait);
+ if (signal_pending(current))
+ return ret ? ret : -ERESTARTSYS;
+ continue;
+ }
+ // there are bytes in the buffer to read.
+ // copy from the hw buffer over to the user buffer.
+ // user buffer is designated by "buffer"
+ // virtual address to copy from is dma_buf+swptr
+ // the "cnt" is the number of bytes to read.
+
+ CS_DBGOUT(CS_WAVE_READ, 2, printk(KERN_INFO
+ "_read() copy_to cnt=%d count=%d ", cnt_by, count));
+ CS_DBGOUT(CS_WAVE_READ, 8, printk(KERN_INFO
+ " .sbufsz=%d .count=%d buffer=0x%.8x ret=%d\n",
+ s->dma_adc.sbufsz, s->dma_adc.count,
+ (unsigned) buffer, ret));
+
+ if (copy_to_user (buffer, ((void *)s->dma_adc.sb_swptr), cnt_by))
+ return ret ? ret : -EFAULT;
+ copied = cnt_by;
+
+ /* Return the descriptors */
+ spin_lock_irqsave(&s->lock, flags);
+ CS_DBGOUT(CS_FUNCTION, 2,
+ printk(KERN_INFO "cs4297a: upd_rcv sw->hw %x/%x\n", s->dma_adc.swptr, s->dma_adc.hwptr));
+ s->dma_adc.count -= cnt_by;
+ s->dma_adc.sb_swptr += cnt * 2;
+ if (s->dma_adc.sb_swptr == s->dma_adc.sb_end)
+ s->dma_adc.sb_swptr = s->dma_adc.sample_buf;
+ spin_unlock_irqrestore(&s->lock, flags);
+ count -= copied;
+ buffer += copied;
+ ret += copied;
+ start_adc(s);
+ }
+ CS_DBGOUT(CS_FUNCTION | CS_WAVE_READ, 2,
+ printk(KERN_INFO "cs4297a: cs4297a_read()- %d\n", ret));
+ return ret;
+}
+
+
+static ssize_t cs4297a_write(struct file *file, const char *buffer,
+ size_t count, loff_t * ppos)
+{
+ struct cs4297a_state *s =
+ (struct cs4297a_state *) file->private_data;
+ ssize_t ret;
+ unsigned long flags;
+ unsigned swptr, hwptr;
+ int cnt;
+
+ CS_DBGOUT(CS_FUNCTION | CS_WAVE_WRITE, 2,
+ printk(KERN_INFO "cs4297a: cs4297a_write()+ count=%d\n",
+ count));
+ VALIDATE_STATE(s);
+
+ if (ppos != &file->f_pos)
+ return -ESPIPE;
+ if (s->dma_dac.mapped)
+ return -ENXIO;
+ if (!s->dma_dac.ready && (ret = prog_dmabuf_dac(s)))
+ return ret;
+ if (!access_ok(VERIFY_READ, buffer, count))
+ return -EFAULT;
+ ret = 0;
+ while (count > 0) {
+ serdma_t *d = &s->dma_dac;
+ int copy_cnt;
+ u32 *s_tmpl;
+ u32 *t_tmpl;
+ u32 left, right;
+ /* XXXKW check system endian here ... */
+ int swap = (s->prop_dac.fmt == AFMT_S16_LE) || (s->prop_dac.fmt == AFMT_U16_LE);
+
+ /* XXXXXX this is broken for BLOAT_FACTOR */
+ spin_lock_irqsave(&s->lock, flags);
+ if (d->count < 0) {
+ d->count = 0;
+ d->swptr = d->hwptr;
+ }
+ if (d->underrun) {
+ d->underrun = 0;
+ hwptr = (unsigned) (((in64(SS_CSR(R_SER_DMA_CUR_DSCR_ADDR_TX)) & M_DMA_CURDSCR_ADDR) -
+ d->descrtab_phys) / sizeof(serdma_descr_t));
+ d->swptr = d->hwptr = hwptr;
+ }
+ swptr = d->swptr;
+ cnt = d->sbufsz - (swptr * FRAME_SAMPLE_BYTES);
+ /* Will this write fill up the buffer? */
+ if (d->count + cnt > d->sbufsz)
+ cnt = d->sbufsz - d->count;
+ spin_unlock_irqrestore(&s->lock, flags);
+ if (cnt > count)
+ cnt = count;
+ if (cnt <= 0) {
+ start_dac(s);
+ if (file->f_flags & O_NONBLOCK)
+ return ret ? ret : -EAGAIN;
+ interruptible_sleep_on(&d->wait);
+ if (signal_pending(current))
+ return ret ? ret : -ERESTARTSYS;
+ continue;
+ }
+ if (copy_from_user(d->sample_buf, buffer, cnt))
+ return ret ? ret : -EFAULT;
+
+ copy_cnt = cnt;
+ s_tmpl = (u32 *)d->sample_buf;
+ t_tmpl = (u32 *)(d->dma_buf + (swptr * 4));
+
+ /* XXXKW assuming 16-bit stereo! */
+ do {
+ t_tmpl[0] = 0x98000000;
+ left = s_tmpl[0] >> 16;
+ if (left & 0x8000)
+ left |= 0xf0000;
+ right = s_tmpl[0] & 0xffff;
+ if (right & 0x8000)
+ right |= 0xf0000;
+ if (swap) {
+ t_tmpl[1] = left & 0xff;
+ t_tmpl[2] = ((left & 0xff00) << 16) | ((right & 0xff) << 12) |
+ ((right & 0xff00) >> 4);
+ } else {
+ t_tmpl[1] = left >> 8;
+ t_tmpl[2] = ((left & 0xff) << 24) | (right << 4);
+ }
+ s_tmpl++;
+ t_tmpl += 8;
+ copy_cnt -= 4;
+ } while (copy_cnt);
+
+ /* Mux in any pending read/write accesses */
+ if (s->reg_request) {
+ *(u64 *)(d->dma_buf + (swptr * 4)) |= s->reg_request;
+ s->reg_request = 0;
+ wake_up(&s->dma_dac.reg_wait);
+ }
+
+ CS_DBGOUT(CS_WAVE_WRITE, 4,
+ printk(KERN_INFO
+ "cs4297a: copy in %d to swptr %x\n", cnt, swptr));
+
+ swptr = (swptr + (cnt/FRAME_SAMPLE_BYTES)) % d->ringsz;
+ out64(cnt/FRAME_SAMPLE_BYTES, SS_CSR(R_SER_DMA_DSCR_COUNT_TX));
+ spin_lock_irqsave(&s->lock, flags);
+ d->swptr = swptr;
+ d->count += cnt;
+ d->endcleared = 0;
+ spin_unlock_irqrestore(&s->lock, flags);
+ count -= cnt;
+ buffer += cnt;
+ ret += cnt;
+ start_dac(s);
+ }
+ CS_DBGOUT(CS_FUNCTION | CS_WAVE_WRITE, 2,
+ printk(KERN_INFO "cs4297a: cs4297a_write()- %d\n", ret));
+ return ret;
+}
+
+
+static unsigned int cs4297a_poll(struct file *file,
+ struct poll_table_struct *wait)
+{
+ struct cs4297a_state *s =
+ (struct cs4297a_state *) file->private_data;
+ unsigned long flags;
+ unsigned int mask = 0;
+
+ CS_DBGOUT(CS_FUNCTION | CS_WAVE_WRITE | CS_WAVE_READ, 4,
+ printk(KERN_INFO "cs4297a: cs4297a_poll()+\n"));
+ VALIDATE_STATE(s);
+ if (file->f_mode & FMODE_WRITE) {
+ CS_DBGOUT(CS_FUNCTION | CS_WAVE_WRITE | CS_WAVE_READ, 4,
+ printk(KERN_INFO
+ "cs4297a: cs4297a_poll() wait on FMODE_WRITE\n"));
+ if(!s->dma_dac.ready && prog_dmabuf_dac(s))
+ return 0;
+ poll_wait(file, &s->dma_dac.wait, wait);
+ }
+ if (file->f_mode & FMODE_READ) {
+ CS_DBGOUT(CS_FUNCTION | CS_WAVE_WRITE | CS_WAVE_READ, 4,
+ printk(KERN_INFO
+ "cs4297a: cs4297a_poll() wait on FMODE_READ\n"));
+ if(!s->dma_dac.ready && prog_dmabuf_adc(s))
+ return 0;
+ poll_wait(file, &s->dma_adc.wait, wait);
+ }
+ spin_lock_irqsave(&s->lock, flags);
+ cs4297a_update_ptr(s,CS_FALSE);
+ if (file->f_mode & FMODE_WRITE) {
+ if (s->dma_dac.mapped) {
+ if (s->dma_dac.count >=
+ (signed) s->dma_dac.fragsize) {
+ if (s->dma_dac.wakeup)
+ mask |= POLLOUT | POLLWRNORM;
+ else
+ mask = 0;
+ s->dma_dac.wakeup = 0;
+ }
+ } else {
+ if ((signed) (s->dma_dac.sbufsz/2) >= s->dma_dac.count)
+ mask |= POLLOUT | POLLWRNORM;
+ }
+ } else if (file->f_mode & FMODE_READ) {
+ if (s->dma_adc.mapped) {
+ if (s->dma_adc.count >= (signed) s->dma_adc.fragsize)
+ mask |= POLLIN | POLLRDNORM;
+ } else {
+ if (s->dma_adc.count > 0)
+ mask |= POLLIN | POLLRDNORM;
+ }
+ }
+ spin_unlock_irqrestore(&s->lock, flags);
+ CS_DBGOUT(CS_FUNCTION | CS_WAVE_WRITE | CS_WAVE_READ, 4,
+ printk(KERN_INFO "cs4297a: cs4297a_poll()- 0x%.8x\n",
+ mask));
+ return mask;
+}
+
+
+static int cs4297a_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ /* XXXKW currently no mmap support */
+ return -EINVAL;
+ return 0;
+}
+
+
+static int cs4297a_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct cs4297a_state *s =
+ (struct cs4297a_state *) file->private_data;
+ unsigned long flags;
+ audio_buf_info abinfo;
+ count_info cinfo;
+ int val, mapped, ret;
+
+ CS_DBGOUT(CS_FUNCTION|CS_IOCTL, 4, printk(KERN_INFO
+ "cs4297a: cs4297a_ioctl(): file=0x%.8x cmd=0x%.8x\n",
+ (unsigned) file, cmd));
+#if CSDEBUG
+ cs_printioctl(cmd);
+#endif
+ VALIDATE_STATE(s);
+ mapped = ((file->f_mode & FMODE_WRITE) && s->dma_dac.mapped) ||
+ ((file->f_mode & FMODE_READ) && s->dma_adc.mapped);
+ switch (cmd) {
+ case OSS_GETVERSION:
+ CS_DBGOUT(CS_IOCTL | CS_PARMS, 4, printk(KERN_INFO
+ "cs4297a: cs4297a_ioctl(): SOUND_VERSION=0x%.8x\n",
+ SOUND_VERSION));
+ return put_user(SOUND_VERSION, (int *) arg);
+
+ case SNDCTL_DSP_SYNC:
+ CS_DBGOUT(CS_IOCTL, 4, printk(KERN_INFO
+ "cs4297a: cs4297a_ioctl(): DSP_SYNC\n"));
+ if (file->f_mode & FMODE_WRITE)
+ return drain_dac(s,
+ 0 /*file->f_flags & O_NONBLOCK */
+ );
+ return 0;
+
+ case SNDCTL_DSP_SETDUPLEX:
+ return 0;
+
+ case SNDCTL_DSP_GETCAPS:
+ return put_user(DSP_CAP_DUPLEX | DSP_CAP_REALTIME |
+ DSP_CAP_TRIGGER | DSP_CAP_MMAP,
+ (int *) arg);
+
+ case SNDCTL_DSP_RESET:
+ CS_DBGOUT(CS_IOCTL, 4, printk(KERN_INFO
+ "cs4297a: cs4297a_ioctl(): DSP_RESET\n"));
+ if (file->f_mode & FMODE_WRITE) {
+ stop_dac(s);
+ synchronize_irq();
+ s->dma_dac.count = s->dma_dac.total_bytes =
+ s->dma_dac.blocks = s->dma_dac.wakeup = 0;
+ s->dma_dac.swptr = s->dma_dac.hwptr =
+ (int)(((in64(SS_CSR(R_SER_DMA_CUR_DSCR_ADDR_TX)) & M_DMA_CURDSCR_ADDR) -
+ s->dma_dac.descrtab_phys) / sizeof(serdma_descr_t));
+ }
+ if (file->f_mode & FMODE_READ) {
+ stop_adc(s);
+ synchronize_irq();
+ s->dma_adc.count = s->dma_adc.total_bytes =
+ s->dma_adc.blocks = s->dma_dac.wakeup = 0;
+ s->dma_adc.swptr = s->dma_adc.hwptr =
+ (int)(((in64(SS_CSR(R_SER_DMA_CUR_DSCR_ADDR_RX)) & M_DMA_CURDSCR_ADDR) -
+ s->dma_adc.descrtab_phys) / sizeof(serdma_descr_t));
+ }
+ return 0;
+
+ case SNDCTL_DSP_SPEED:
+ if (get_user(val, (int *) arg))
+ return -EFAULT;
+ CS_DBGOUT(CS_IOCTL | CS_PARMS, 4, printk(KERN_INFO
+ "cs4297a: cs4297a_ioctl(): DSP_SPEED val=%d -> 48000\n", val));
+ val = 48000;
+ return put_user(val, (int *) arg);
+
+ case SNDCTL_DSP_STEREO:
+ if (get_user(val, (int *) arg))
+ return -EFAULT;
+ CS_DBGOUT(CS_IOCTL | CS_PARMS, 4, printk(KERN_INFO
+ "cs4297a: cs4297a_ioctl(): DSP_STEREO val=%d\n", val));
+ if (file->f_mode & FMODE_READ) {
+ stop_adc(s);
+ s->dma_adc.ready = 0;
+ s->prop_adc.channels = val ? 2 : 1;
+ }
+ if (file->f_mode & FMODE_WRITE) {
+ stop_dac(s);
+ s->dma_dac.ready = 0;
+ s->prop_dac.channels = val ? 2 : 1;
+ }
+ return 0;
+
+ case SNDCTL_DSP_CHANNELS:
+ if (get_user(val, (int *) arg))
+ return -EFAULT;
+ CS_DBGOUT(CS_IOCTL | CS_PARMS, 4, printk(KERN_INFO
+ "cs4297a: cs4297a_ioctl(): DSP_CHANNELS val=%d\n",
+ val));
+ if (val != 0) {
+ if (file->f_mode & FMODE_READ) {
+ stop_adc(s);
+ s->dma_adc.ready = 0;
+ if (val >= 2)
+ s->prop_adc.channels = 2;
+ else
+ s->prop_adc.channels = 1;
+ }
+ if (file->f_mode & FMODE_WRITE) {
+ stop_dac(s);
+ s->dma_dac.ready = 0;
+ if (val >= 2)
+ s->prop_dac.channels = 2;
+ else
+ s->prop_dac.channels = 1;
+ }
+ }
+
+ if (file->f_mode & FMODE_WRITE)
+ val = s->prop_dac.channels;
+ else if (file->f_mode & FMODE_READ)
+ val = s->prop_adc.channels;
+
+ return put_user(val, (int *) arg);
+
+ case SNDCTL_DSP_GETFMTS: // Returns a mask
+ CS_DBGOUT(CS_IOCTL | CS_PARMS, 4, printk(KERN_INFO
+ "cs4297a: cs4297a_ioctl(): DSP_GETFMT val=0x%.8x\n",
+ AFMT_S16_LE | AFMT_U16_LE | AFMT_S8 |
+ AFMT_U8));
+ return put_user(AFMT_S16_LE | AFMT_U16_LE | AFMT_S8 |
+ AFMT_U8, (int *) arg);
+
+ case SNDCTL_DSP_SETFMT:
+ if (get_user(val, (int *) arg))
+ return -EFAULT;
+ CS_DBGOUT(CS_IOCTL | CS_PARMS, 4, printk(KERN_INFO
+ "cs4297a: cs4297a_ioctl(): DSP_SETFMT val=0x%.8x\n",
+ val));
+ if (val != AFMT_QUERY) {
+ if (file->f_mode & FMODE_READ) {
+ stop_adc(s);
+ s->dma_adc.ready = 0;
+ if (val != AFMT_S16_LE
+ && val != AFMT_U16_LE && val != AFMT_S8
+ && val != AFMT_U8)
+ val = AFMT_U8;
+ s->prop_adc.fmt = val;
+ s->prop_adc.fmt_original = s->prop_adc.fmt;
+ }
+ if (file->f_mode & FMODE_WRITE) {
+ stop_dac(s);
+ s->dma_dac.ready = 0;
+ if (val != AFMT_S16_LE
+ && val != AFMT_U16_LE && val != AFMT_S8
+ && val != AFMT_U8)
+ val = AFMT_U8;
+ s->prop_dac.fmt = val;
+ s->prop_dac.fmt_original = s->prop_dac.fmt;
+ }
+ } else {
+ if (file->f_mode & FMODE_WRITE)
+ val = s->prop_dac.fmt_original;
+ else if (file->f_mode & FMODE_READ)
+ val = s->prop_adc.fmt_original;
+ }
+ CS_DBGOUT(CS_IOCTL | CS_PARMS, 4, printk(KERN_INFO
+ "cs4297a: cs4297a_ioctl(): DSP_SETFMT return val=0x%.8x\n",
+ val));
+ return put_user(val, (int *) arg);
+
+ case SNDCTL_DSP_POST:
+ CS_DBGOUT(CS_IOCTL, 4, printk(KERN_INFO
+ "cs4297a: cs4297a_ioctl(): DSP_POST\n"));
+ return 0;
+
+ case SNDCTL_DSP_GETTRIGGER:
+ val = 0;
+ if (file->f_mode & s->ena & FMODE_READ)
+ val |= PCM_ENABLE_INPUT;
+ if (file->f_mode & s->ena & FMODE_WRITE)
+ val |= PCM_ENABLE_OUTPUT;
+ return put_user(val, (int *) arg);
+
+ case SNDCTL_DSP_SETTRIGGER:
+ if (get_user(val, (int *) arg))
+ return -EFAULT;
+ if (file->f_mode & FMODE_READ) {
+ if (val & PCM_ENABLE_INPUT) {
+ if (!s->dma_adc.ready
+ && (ret = prog_dmabuf_adc(s)))
+ return ret;
+ start_adc(s);
+ } else
+ stop_adc(s);
+ }
+ if (file->f_mode & FMODE_WRITE) {
+ if (val & PCM_ENABLE_OUTPUT) {
+ if (!s->dma_dac.ready
+ && (ret = prog_dmabuf_dac(s)))
+ return ret;
+ start_dac(s);
+ } else
+ stop_dac(s);
+ }
+ return 0;
+
+ case SNDCTL_DSP_GETOSPACE:
+ if (!(file->f_mode & FMODE_WRITE))
+ return -EINVAL;
+ if (!s->dma_dac.ready && (val = prog_dmabuf_dac(s)))
+ return val;
+ spin_lock_irqsave(&s->lock, flags);
+ cs4297a_update_ptr(s,CS_FALSE);
+ abinfo.fragsize = s->dma_dac.fragsize;
+ if (s->dma_dac.mapped)
+ abinfo.bytes = s->dma_dac.sbufsz;
+ else
+ abinfo.bytes =
+ s->dma_dac.sbufsz - s->dma_dac.count;
+ abinfo.fragstotal = s->dma_dac.numfrag;
+ abinfo.fragments = abinfo.bytes >> s->dma_dac.fragshift;
+ CS_DBGOUT(CS_FUNCTION | CS_PARMS, 4, printk(KERN_INFO
+ "cs4297a: cs4297a_ioctl(): GETOSPACE .fragsize=%d .bytes=%d .fragstotal=%d .fragments=%d\n",
+ abinfo.fragsize,abinfo.bytes,abinfo.fragstotal,
+ abinfo.fragments));
+ spin_unlock_irqrestore(&s->lock, flags);
+ return copy_to_user((void *) arg, &abinfo,
+ sizeof(abinfo)) ? -EFAULT : 0;
+
+ case SNDCTL_DSP_GETISPACE:
+ if (!(file->f_mode & FMODE_READ))
+ return -EINVAL;
+ if (!s->dma_adc.ready && (val = prog_dmabuf_adc(s)))
+ return val;
+ spin_lock_irqsave(&s->lock, flags);
+ cs4297a_update_ptr(s,CS_FALSE);
+ if (s->conversion) {
+ abinfo.fragsize = s->dma_adc.fragsize / 2;
+ abinfo.bytes = s->dma_adc.count / 2;
+ abinfo.fragstotal = s->dma_adc.numfrag;
+ abinfo.fragments =
+ abinfo.bytes >> (s->dma_adc.fragshift - 1);
+ } else {
+ abinfo.fragsize = s->dma_adc.fragsize;
+ abinfo.bytes = s->dma_adc.count;
+ abinfo.fragstotal = s->dma_adc.numfrag;
+ abinfo.fragments =
+ abinfo.bytes >> s->dma_adc.fragshift;
+ }
+ spin_unlock_irqrestore(&s->lock, flags);
+ return copy_to_user((void *) arg, &abinfo,
+ sizeof(abinfo)) ? -EFAULT : 0;
+
+ case SNDCTL_DSP_NONBLOCK:
+ file->f_flags |= O_NONBLOCK;
+ return 0;
+
+ case SNDCTL_DSP_GETODELAY:
+ if (!(file->f_mode & FMODE_WRITE))
+ return -EINVAL;
+ if(!s->dma_dac.ready && prog_dmabuf_dac(s))
+ return 0;
+ spin_lock_irqsave(&s->lock, flags);
+ cs4297a_update_ptr(s,CS_FALSE);
+ val = s->dma_dac.count;
+ spin_unlock_irqrestore(&s->lock, flags);
+ return put_user(val, (int *) arg);
+
+ case SNDCTL_DSP_GETIPTR:
+ if (!(file->f_mode & FMODE_READ))
+ return -EINVAL;
+ if(!s->dma_adc.ready && prog_dmabuf_adc(s))
+ return 0;
+ spin_lock_irqsave(&s->lock, flags);
+ cs4297a_update_ptr(s,CS_FALSE);
+ cinfo.bytes = s->dma_adc.total_bytes;
+ if (s->dma_adc.mapped) {
+ cinfo.blocks =
+ (cinfo.bytes >> s->dma_adc.fragshift) -
+ s->dma_adc.blocks;
+ s->dma_adc.blocks =
+ cinfo.bytes >> s->dma_adc.fragshift;
+ } else {
+ if (s->conversion) {
+ cinfo.blocks =
+ s->dma_adc.count /
+ 2 >> (s->dma_adc.fragshift - 1);
+ } else
+ cinfo.blocks =
+ s->dma_adc.count >> s->dma_adc.
+ fragshift;
+ }
+ if (s->conversion)
+ cinfo.ptr = s->dma_adc.hwptr / 2;
+ else
+ cinfo.ptr = s->dma_adc.hwptr;
+ if (s->dma_adc.mapped)
+ s->dma_adc.count &= s->dma_adc.fragsize - 1;
+ spin_unlock_irqrestore(&s->lock, flags);
+ return copy_to_user((void *) arg, &cinfo, sizeof(cinfo));
+
+ case SNDCTL_DSP_GETOPTR:
+ if (!(file->f_mode & FMODE_WRITE))
+ return -EINVAL;
+ if(!s->dma_dac.ready && prog_dmabuf_dac(s))
+ return 0;
+ spin_lock_irqsave(&s->lock, flags);
+ cs4297a_update_ptr(s,CS_FALSE);
+ cinfo.bytes = s->dma_dac.total_bytes;
+ if (s->dma_dac.mapped) {
+ cinfo.blocks =
+ (cinfo.bytes >> s->dma_dac.fragshift) -
+ s->dma_dac.blocks;
+ s->dma_dac.blocks =
+ cinfo.bytes >> s->dma_dac.fragshift;
+ } else {
+ cinfo.blocks =
+ s->dma_dac.count >> s->dma_dac.fragshift;
+ }
+ cinfo.ptr = s->dma_dac.hwptr;
+ if (s->dma_dac.mapped)
+ s->dma_dac.count &= s->dma_dac.fragsize - 1;
+ spin_unlock_irqrestore(&s->lock, flags);
+ return copy_to_user((void *) arg, &cinfo, sizeof(cinfo));
+
+ case SNDCTL_DSP_GETBLKSIZE:
+ if (file->f_mode & FMODE_WRITE) {
+ if ((val = prog_dmabuf_dac(s)))
+ return val;
+ return put_user(s->dma_dac.fragsize, (int *) arg);
+ }
+ if ((val = prog_dmabuf_adc(s)))
+ return val;
+ if (s->conversion)
+ return put_user(s->dma_adc.fragsize / 2,
+ (int *) arg);
+ else
+ return put_user(s->dma_adc.fragsize, (int *) arg);
+
+ case SNDCTL_DSP_SETFRAGMENT:
+ if (get_user(val, (int *) arg))
+ return -EFAULT;
+ return 0; // Say OK, but do nothing.
+
+ case SNDCTL_DSP_SUBDIVIDE:
+ if ((file->f_mode & FMODE_READ && s->dma_adc.subdivision)
+ || (file->f_mode & FMODE_WRITE
+ && s->dma_dac.subdivision)) return -EINVAL;
+ if (get_user(val, (int *) arg))
+ return -EFAULT;
+ if (val != 1 && val != 2 && val != 4)
+ return -EINVAL;
+ if (file->f_mode & FMODE_READ)
+ s->dma_adc.subdivision = val;
+ else if (file->f_mode & FMODE_WRITE)
+ s->dma_dac.subdivision = val;
+ return 0;
+
+ case SOUND_PCM_READ_RATE:
+ if (file->f_mode & FMODE_READ)
+ return put_user(s->prop_adc.rate, (int *) arg);
+ else if (file->f_mode & FMODE_WRITE)
+ return put_user(s->prop_dac.rate, (int *) arg);
+
+ case SOUND_PCM_READ_CHANNELS:
+ if (file->f_mode & FMODE_READ)
+ return put_user(s->prop_adc.channels, (int *) arg);
+ else if (file->f_mode & FMODE_WRITE)
+ return put_user(s->prop_dac.channels, (int *) arg);
+
+ case SOUND_PCM_READ_BITS:
+ if (file->f_mode & FMODE_READ)
+ return
+ put_user(
+ (s->prop_adc.
+ fmt & (AFMT_S8 | AFMT_U8)) ? 8 : 16,
+ (int *) arg);
+ else if (file->f_mode & FMODE_WRITE)
+ return
+ put_user(
+ (s->prop_dac.
+ fmt & (AFMT_S8 | AFMT_U8)) ? 8 : 16,
+ (int *) arg);
+
+ case SOUND_PCM_WRITE_FILTER:
+ case SNDCTL_DSP_SETSYNCRO:
+ case SOUND_PCM_READ_FILTER:
+ return -EINVAL;
+ }
+ return mixer_ioctl(s, cmd, arg);
+}
+
+
+static int cs4297a_release(struct inode *inode, struct file *file)
+{
+ struct cs4297a_state *s =
+ (struct cs4297a_state *) file->private_data;
+
+ CS_DBGOUT(CS_FUNCTION | CS_RELEASE, 2, printk(KERN_INFO
+ "cs4297a: cs4297a_release(): inode=0x%.8x file=0x%.8x f_mode=0x%x\n",
+ (unsigned) inode, (unsigned) file, file->f_mode));
+ VALIDATE_STATE(s);
+
+ if (file->f_mode & FMODE_WRITE) {
+ drain_dac(s, file->f_flags & O_NONBLOCK);
+ down(&s->open_sem_dac);
+ stop_dac(s);
+ dealloc_dmabuf(s, &s->dma_dac);
+ s->open_mode &= ~FMODE_WRITE;
+ up(&s->open_sem_dac);
+ wake_up(&s->open_wait_dac);
+ MOD_DEC_USE_COUNT;
+ }
+ if (file->f_mode & FMODE_READ) {
+ drain_adc(s, file->f_flags & O_NONBLOCK);
+ down(&s->open_sem_adc);
+ stop_adc(s);
+ dealloc_dmabuf(s, &s->dma_adc);
+ s->open_mode &= ~FMODE_READ;
+ up(&s->open_sem_adc);
+ wake_up(&s->open_wait_adc);
+ MOD_DEC_USE_COUNT;
+ }
+ return 0;
+}
+
+static int cs4297a_open(struct inode *inode, struct file *file)
+{
+ int minor = MINOR(inode->i_rdev);
+ struct cs4297a_state *s=NULL;
+ struct list_head *entry;
+
+ CS_DBGOUT(CS_FUNCTION | CS_OPEN, 2, printk(KERN_INFO
+ "cs4297a: cs4297a_open(): inode=0x%.8x file=0x%.8x f_mode=0x%x\n",
+ (unsigned) inode, (unsigned) file, file->f_mode));
+ CS_DBGOUT(CS_FUNCTION | CS_OPEN, 2, printk(KERN_INFO
+ "cs4297a: status = %08x\n", (int)in64(SS_CSR(R_SER_STATUS_DEBUG))));
+
+ list_for_each(entry, &cs4297a_devs)
+ {
+ s = list_entry(entry, struct cs4297a_state, list);
+
+ if (!((s->dev_audio ^ minor) & ~0xf))
+ break;
+ }
+ if (entry == &cs4297a_devs)
+ return -ENODEV;
+ if (!s) {
+ CS_DBGOUT(CS_FUNCTION | CS_OPEN, 2, printk(KERN_INFO
+ "cs4297a: cs4297a_open(): Error - unable to find audio state struct\n"));
+ return -ENODEV;
+ }
+ VALIDATE_STATE(s);
+ file->private_data = s;
+
+ // wait for device to become free
+ if (!(file->f_mode & (FMODE_WRITE | FMODE_READ))) {
+ CS_DBGOUT(CS_FUNCTION | CS_OPEN | CS_ERROR, 2, printk(KERN_INFO
+ "cs4297a: cs4297a_open(): Error - must open READ and/or WRITE\n"));
+ return -ENODEV;
+ }
+ if (file->f_mode & FMODE_WRITE) {
+ if (in64(SS_CSR(R_SER_DMA_DSCR_COUNT_TX)) != 0) {
+ printk(KERN_ERR "cs4297a: TX pipe needs to drain\n");
+ while (in64(SS_CSR(R_SER_DMA_DSCR_COUNT_TX)))
+ ;
+ }
+
+ down(&s->open_sem_dac);
+ while (s->open_mode & FMODE_WRITE) {
+ if (file->f_flags & O_NONBLOCK) {
+ up(&s->open_sem_dac);
+ return -EBUSY;
+ }
+ up(&s->open_sem_dac);
+ interruptible_sleep_on(&s->open_wait_dac);
+
+ if (signal_pending(current)) {
+ printk("open - sig pending\n");
+ return -ERESTARTSYS;
+ }
+ down(&s->open_sem_dac);
+ }
+ }
+ if (file->f_mode & FMODE_READ) {
+ down(&s->open_sem_adc);
+ while (s->open_mode & FMODE_READ) {
+ if (file->f_flags & O_NONBLOCK) {
+ up(&s->open_sem_adc);
+ return -EBUSY;
+ }
+ up(&s->open_sem_adc);
+ interruptible_sleep_on(&s->open_wait_adc);
+
+ if (signal_pending(current)) {
+ printk("open - sig pending\n");
+ return -ERESTARTSYS;
+ }
+ down(&s->open_sem_adc);
+ }
+ }
+ s->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE);
+ if (file->f_mode & FMODE_READ) {
+ s->prop_adc.fmt = AFMT_S16_BE;
+ s->prop_adc.fmt_original = s->prop_adc.fmt;
+ s->prop_adc.channels = 2;
+ s->prop_adc.rate = 48000;
+ s->conversion = 0;
+ s->ena &= ~FMODE_READ;
+ s->dma_adc.ossfragshift = s->dma_adc.ossmaxfrags =
+ s->dma_adc.subdivision = 0;
+ up(&s->open_sem_adc);
+ MOD_INC_USE_COUNT;
+
+ if (prog_dmabuf_adc(s)) {
+ CS_DBGOUT(CS_OPEN | CS_ERROR, 2, printk(KERN_ERR
+ "cs4297a: adc Program dmabufs failed.\n"));
+ cs4297a_release(inode, file);
+ return -ENOMEM;
+ }
+ }
+ if (file->f_mode & FMODE_WRITE) {
+ s->prop_dac.fmt = AFMT_S16_BE;
+ s->prop_dac.fmt_original = s->prop_dac.fmt;
+ s->prop_dac.channels = 2;
+ s->prop_dac.rate = 48000;
+ s->conversion = 0;
+ s->ena &= ~FMODE_WRITE;
+ s->dma_dac.ossfragshift = s->dma_dac.ossmaxfrags =
+ s->dma_dac.subdivision = 0;
+ up(&s->open_sem_dac);
+ MOD_INC_USE_COUNT;
+
+ if (prog_dmabuf_dac(s)) {
+ CS_DBGOUT(CS_OPEN | CS_ERROR, 2, printk(KERN_ERR
+ "cs4297a: dac Program dmabufs failed.\n"));
+ cs4297a_release(inode, file);
+ return -ENOMEM;
+ }
+ }
+ CS_DBGOUT(CS_FUNCTION | CS_OPEN, 2,
+ printk(KERN_INFO "cs4297a: cs4297a_open()- 0\n"));
+ return 0;
+}
+
+
+// ******************************************************************************************
+// Wave (audio) file operations struct.
+// ******************************************************************************************
+static /*const */ struct file_operations cs4297a_audio_fops = {
+ llseek:cs4297a_llseek,
+ read:cs4297a_read,
+ write:cs4297a_write,
+ poll:cs4297a_poll,
+ ioctl:cs4297a_ioctl,
+ mmap:cs4297a_mmap,
+ open:cs4297a_open,
+ release:cs4297a_release,
+};
+
+static irqreturn_t cs4297a_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct cs4297a_state *s = (struct cs4297a_state *) dev_id;
+ u32 status;
+
+ status = in64(SS_CSR(R_SER_STATUS_DEBUG));
+
+ CS_DBGOUT(CS_INTERRUPT, 6, printk(KERN_INFO
+ "cs4297a: cs4297a_interrupt() HISR=0x%.8x\n", status));
+
+#if 0
+ /* XXXKW what check *should* be done here? */
+ if (!(status & (M_SYNCSER_RX_EOP_COUNT | M_SYNCSER_RX_OVERRUN | M_SYNCSER_RX_SYNC_ERR))) {
+ status = in64(SS_CSR(R_SER_STATUS));
+ printk(KERN_ERR "cs4297a: unexpected interrupt (status %08x)\n", status);
+ return IRQ_HANDLED;
+ }
+#endif
+
+ if (status & M_SYNCSER_RX_SYNC_ERR) {
+ status = in64(SS_CSR(R_SER_STATUS));
+ printk(KERN_ERR "cs4297a: rx sync error (status %08x)\n", status);
+ return IRQ_HANDLED;
+ }
+
+ if (status & M_SYNCSER_RX_OVERRUN) {
+ int newptr, i;
+ s->stats.rx_ovrrn++;
+ printk(KERN_ERR "cs4297a: receive FIFO overrun\n");
+
+ /* Fix things up: get the receive descriptor pool
+ clean and give them back to the hardware */
+ while (in64(SS_CSR(R_SER_DMA_DSCR_COUNT_RX)))
+ ;
+ newptr = (unsigned) (((in64(SS_CSR(R_SER_DMA_CUR_DSCR_ADDR_RX)) & M_DMA_CURDSCR_ADDR) -
+ s->dma_adc.descrtab_phys) / sizeof(serdma_descr_t));
+ for (i=0; i<DMA_DESCR; i++) {
+ s->dma_adc.descrtab[i].descr_a &= ~M_DMA_SERRX_SOP;
+ }
+ s->dma_adc.swptr = s->dma_adc.hwptr = newptr;
+ s->dma_adc.count = 0;
+ s->dma_adc.sb_swptr = s->dma_adc.sb_hwptr = s->dma_adc.sample_buf;
+ out64(DMA_DESCR, SS_CSR(R_SER_DMA_DSCR_COUNT_RX));
+ }
+
+ spin_lock(&s->lock);
+ cs4297a_update_ptr(s,CS_TRUE);
+ spin_unlock(&s->lock);
+
+ CS_DBGOUT(CS_INTERRUPT, 6, printk(KERN_INFO
+ "cs4297a: cs4297a_interrupt()-\n"));
+ return IRQ_HANDLED;
+}
+
+static struct initvol {
+ int mixch;
+ int vol;
+} initvol[] __initdata = {
+
+ {SOUND_MIXER_WRITE_VOLUME, 0x4040},
+ {SOUND_MIXER_WRITE_PCM, 0x4040},
+ {SOUND_MIXER_WRITE_SYNTH, 0x4040},
+ {SOUND_MIXER_WRITE_CD, 0x4040},
+ {SOUND_MIXER_WRITE_LINE, 0x4040},
+ {SOUND_MIXER_WRITE_LINE1, 0x4040},
+ {SOUND_MIXER_WRITE_RECLEV, 0x0000},
+ {SOUND_MIXER_WRITE_SPEAKER, 0x4040},
+ {SOUND_MIXER_WRITE_MIC, 0x0000}
+};
+
+static int __init cs4297a_init(void)
+{
+ struct cs4297a_state *s;
+ u64 cfg;
+ u32 pwr, id;
+ mm_segment_t fs;
+ int rval, mdio_val;
+
+ CS_DBGOUT(CS_INIT | CS_FUNCTION, 2, printk(KERN_INFO
+ "cs4297a: cs4297a_init_module()+ \n"));
+
+ mdio_val = in64(KSEG1 + A_MAC_REGISTER(2, R_MAC_MDIO)) &
+ (M_MAC_MDIO_DIR|M_MAC_MDIO_OUT);
+
+ /* Check syscfg for synchronous serial on port 1 */
+ cfg = in64(KSEG1 + A_SCD_SYSTEM_CFG);
+ if (!(cfg & M_SYS_SER1_ENABLE)) {
+ out64(cfg | M_SYS_SER1_ENABLE, KSEG1+A_SCD_SYSTEM_CFG);
+ cfg = in64(KSEG1 + A_SCD_SYSTEM_CFG);
+ if (!(cfg & M_SYS_SER1_ENABLE)) {
+ printk(KERN_INFO "cs4297a: serial port 1 not configured for synchronous operation\n");
+ return -1;
+ }
+
+ printk(KERN_INFO "cs4297a: serial port 1 switching to synchronous operation\n");
+
+ /* Force the codec (on SWARM) to reset by clearing
+ GENO, preserving MDIO (no effect on CSWARM) */
+ out64(mdio_val, KSEG1+A_MAC_REGISTER(2, R_MAC_MDIO));
+ udelay(10);
+ }
+
+ /* Now set GENO */
+ out64(mdio_val | M_MAC_GENC, KSEG1+A_MAC_REGISTER(2, R_MAC_MDIO));
+ /* Give the codec some time to finish resetting (start the bit clock) */
+ udelay(100);
+
+ if (!(s = kmalloc(sizeof(struct cs4297a_state), GFP_KERNEL))) {
+ CS_DBGOUT(CS_ERROR, 1, printk(KERN_ERR
+ "cs4297a: probe() no memory for state struct.\n"));
+ return -1;
+ }
+ memset(s, 0, sizeof(struct cs4297a_state));
+ s->magic = CS4297a_MAGIC;
+ init_waitqueue_head(&s->dma_adc.wait);
+ init_waitqueue_head(&s->dma_dac.wait);
+ init_waitqueue_head(&s->dma_adc.reg_wait);
+ init_waitqueue_head(&s->dma_dac.reg_wait);
+ init_waitqueue_head(&s->open_wait);
+ init_waitqueue_head(&s->open_wait_adc);
+ init_waitqueue_head(&s->open_wait_dac);
+ init_MUTEX(&s->open_sem_adc);
+ init_MUTEX(&s->open_sem_dac);
+ spin_lock_init(&s->lock);
+
+ s->irq = K_INT_SER_1;
+
+ if (request_irq
+ (s->irq, cs4297a_interrupt, 0, "Crystal CS4297a", s)) {
+ CS_DBGOUT(CS_INIT | CS_ERROR, 1,
+ printk(KERN_ERR "cs4297a: irq %u in use\n", s->irq));
+ goto err_irq;
+ }
+ if ((s->dev_audio = register_sound_dsp(&cs4297a_audio_fops, -1)) <
+ 0) {
+ CS_DBGOUT(CS_INIT | CS_ERROR, 1, printk(KERN_ERR
+ "cs4297a: probe() register_sound_dsp() failed.\n"));
+ goto err_dev1;
+ }
+ if ((s->dev_mixer = register_sound_mixer(&cs4297a_mixer_fops, -1)) <
+ 0) {
+ CS_DBGOUT(CS_INIT | CS_ERROR, 1, printk(KERN_ERR
+ "cs4297a: probe() register_sound_mixer() failed.\n"));
+ goto err_dev2;
+ }
+
+ if (ser_init(s) || dma_init(s)) {
+ CS_DBGOUT(CS_INIT | CS_ERROR, 1, printk(KERN_ERR
+ "cs4297a: ser_init failed.\n"));
+ goto err_dev3;
+ }
+
+ do {
+ udelay(4000);
+ rval = cs4297a_read_ac97(s, AC97_POWER_CONTROL, &pwr);
+ } while (!rval && (pwr != 0xf));
+
+ if (!rval) {
+ fs = get_fs();
+ set_fs(KERNEL_DS);
+#if 0
+ val = SOUND_MASK_LINE;
+ mixer_ioctl(s, SOUND_MIXER_WRITE_RECSRC, (unsigned long) &val);
+ for (i = 0; i < sizeof(initvol) / sizeof(initvol[0]); i++) {
+ val = initvol[i].vol;
+ mixer_ioctl(s, initvol[i].mixch, (unsigned long) &val);
+ }
+// cs4297a_write_ac97(s, 0x18, 0x0808);
+#else
+ // cs4297a_write_ac97(s, 0x5e, 0x180);
+ cs4297a_write_ac97(s, 0x02, 0x0808);
+ cs4297a_write_ac97(s, 0x18, 0x0808);
+#endif
+ set_fs(fs);
+
+ list_add(&s->list, &cs4297a_devs);
+
+ cs4297a_read_ac97(s, AC97_VENDOR_ID1, &id);
+
+ printk(KERN_INFO "cs4297a: initialized (vendor id = %x)\n", id);
+
+ CS_DBGOUT(CS_INIT | CS_FUNCTION, 2,
+ printk(KERN_INFO "cs4297a: cs4297a_init_module()-\n"));
+
+ return 0;
+ }
+
+ err_dev3:
+ unregister_sound_mixer(s->dev_mixer);
+ err_dev2:
+ unregister_sound_dsp(s->dev_audio);
+ err_dev1:
+ free_irq(s->irq, s);
+ err_irq:
+ kfree(s);
+
+ printk(KERN_INFO "cs4297a: initialization failed\n");
+
+ return -1;
+}
+
+static void __exit cs4297a_cleanup(void)
+{
+ /*
+ XXXKW
+ disable_irq, free_irq
+ drain DMA queue
+ disable DMA
+ disable TX/RX
+ free memory
+ */
+ CS_DBGOUT(CS_INIT | CS_FUNCTION, 2,
+ printk(KERN_INFO "cs4297a: cleanup_cs4297a() finished\n"));
+}
+
+// ---------------------------------------------------------------------
+
+EXPORT_NO_SYMBOLS;
+
+MODULE_AUTHOR("Kip Walker, kwalker@broadcom.com");
+MODULE_DESCRIPTION("Cirrus Logic CS4297a Driver for Broadcom SWARM board");
+
+// ---------------------------------------------------------------------
+
+module_init(cs4297a_init);
+module_exit(cs4297a_cleanup);
-
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