1 files changed, 1861 insertions, 0 deletions

diff --git a/sound/oss/rme96xx.c b/sound/oss/rme96xx.c
new file mode 100644
index 000000000000..76774bbc1436
--- /dev/null
+++ b/sound/oss/rme96xx.c
@@ -0,0 +1,1861 @@
+/* (C) 2000 Guenter Geiger <geiger@debian.org>
+   with copy/pastes from the driver of Winfried Ritsch <ritsch@iem.kug.ac.at>
+   based on es1370.c
+
+
+
+   *  10 Jan 2001: 0.1 initial version
+   *  19 Jan 2001: 0.2 fixed bug in select()
+   *  27 Apr 2001: 0.3 more than one card usable
+   *  11 May 2001: 0.4 fixed for SMP, included into kernel source tree
+   *  17 May 2001: 0.5 draining code didn't work on new cards
+   *  18 May 2001: 0.6 remove synchronize_irq() call 
+   *  17 Jul 2001: 0.7 updated xrmectrl to make it work for newer cards
+   *   2 feb 2002: 0.8 fixed pci device handling, see below for patches from Heiko (Thanks!)
+                       Marcus Meissner <Marcus.Meissner@caldera.de>
+
+                       Modifications - Heiko Purnhagen <purnhage@tnt.uni-hannover.de>
+                       HP20020108 fixed handling of "large" read()
+                       HP20020116 towards REV 1.5 support, based on ALSA's card-rme9652.c
+                       HP20020118 made mixer ioctl and handling of devices>1 more safe
+                       HP20020201 fixed handling of "large" read() properly
+                       added REV 1.5 S/P-DIF receiver support
+                       SNDCTL_DSP_SPEED now returns the actual speed
+   *  10 Aug 2002: added synchronize_irq() again
+
+TODO:
+   - test more than one card --- done
+   - check for pci IOREGION (see es1370) in rme96xx_probe ??
+   - error detection
+   - mmap interface
+   - mixer mmap interface
+   - mixer ioctl
+   - get rid of noise upon first open (why ??)
+   - allow multiple open (at least for read)
+   - allow multiple open for non overlapping regions
+   - recheck the multiple devices part (offsets of different devices, etc)
+   - do decent draining in _release --- done
+   - SMP support
+   - what about using fragstotal>2 for small fragsize? (HP20020118)
+   - add support for AFMT_S32_LE
+*/
+
+#ifndef RMEVERSION
+#define RMEVERSION "0.8"
+#endif
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/sched.h>
+#include <linux/sound.h>
+#include <linux/soundcard.h>
+#include <linux/pci.h>
+#include <linux/smp_lock.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/poll.h>
+#include <linux/wait.h>
+
+#include <asm/dma.h>
+#include <asm/page.h>
+
+#include "rme96xx.h"
+
+#define NR_DEVICE 2
+
+static int devices = 1;
+module_param(devices, int, 0);
+MODULE_PARM_DESC(devices, "number of dsp devices allocated by the driver");
+
+
+MODULE_AUTHOR("Guenter Geiger, geiger@debian.org");
+MODULE_DESCRIPTION("RME9652/36 \"Hammerfall\" Driver");
+MODULE_LICENSE("GPL");
+
+
+#ifdef DEBUG
+#define DBG(x) printk("RME_DEBUG:");x
+#define COMM(x) printk("RME_COMM: " x "\n");
+#else
+#define DBG(x) while (0) {}
+#define COMM(x)
+#endif
+
+/*-------------------------------------------------------------------------- 
+                        Preporcessor Macros and Definitions
+ --------------------------------------------------------------------------*/
+
+#define RME96xx_MAGIC 0x6473
+
+/* Registers-Space in offsets from base address with 16MByte size */
+
+#define RME96xx_IO_EXTENT     16l*1024l*1024l
+#define RME96xx_CHANNELS_PER_CARD 26
+
+/*                  Write - Register */
+
+/* 0,4,8,12,16,20,24,28 ... hardware init (erasing fifo-pointer intern) */
+#define RME96xx_num_of_init_regs   8
+
+#define RME96xx_init_buffer       (0/4)
+#define RME96xx_play_buffer       (32/4)  /* pointer to 26x64kBit RAM from mainboard */
+#define RME96xx_rec_buffer        (36/4)  /* pointer to 26x64kBit RAM from mainboard */
+#define RME96xx_control_register  (64/4)  /* exact meaning see below */
+#define RME96xx_irq_clear         (96/4)  /* irq acknowledge */
+#define RME96xx_time_code         (100/4) /* if used with alesis adat */
+#define RME96xx_thru_base         (128/4) /* 132...228 Thru for 26 channels */
+#define RME96xx_thru_channels     RME96xx_CHANNELS_PER_CARD
+
+/*                     Read Register */
+
+#define RME96xx_status_register    0     /* meaning see below */
+
+
+
+/* Status Register: */
+/* ------------------------------------------------------------------------ */
+#define RME96xx_IRQ          0x0000001 /* IRQ is High if not reset by RMExx_irq_clear */
+#define RME96xx_lock_2       0x0000002 /* ADAT 3-PLL: 1=locked, 0=unlocked */
+#define RME96xx_lock_1       0x0000004 /* ADAT 2-PLL: 1=locked, 0=unlocked */
+#define RME96xx_lock_0       0x0000008 /* ADAT 1-PLL: 1=locked, 0=unlocked */
+
+#define RME96xx_fs48         0x0000010 /* sample rate 0 ...44.1/88.2,  1 ... 48/96 Khz */
+#define RME96xx_wsel_rd      0x0000020 /* if Word-Clock is used and valid then 1 */
+#define RME96xx_buf_pos1     0x0000040 /* Bit 6..15 : Position of buffer-pointer in 64Bytes-blocks */
+#define RME96xx_buf_pos2     0x0000080 /* resolution +/- 1 64Byte/block (since 64Bytes bursts) */
+ 
+#define RME96xx_buf_pos3     0x0000100 /* 10 bits = 1024 values */
+#define RME96xx_buf_pos4     0x0000200 /* if we mask off the first 6 bits, we can take the status */
+#define RME96xx_buf_pos5     0x0000400 /* register as sample counter in the hardware buffer */
+#define RME96xx_buf_pos6     0x0000800 
+
+#define RME96xx_buf_pos7     0x0001000 
+#define RME96xx_buf_pos8     0x0002000 
+#define RME96xx_buf_pos9     0x0004000
+#define RME96xx_buf_pos10    0x0008000 
+
+#define RME96xx_sync_2       0x0010000 /* if ADAT-IN3 synced to system clock */
+#define RME96xx_sync_1       0x0020000 /* if ADAT-IN2 synced to system clock */
+#define RME96xx_sync_0       0x0040000 /* if ADAT-IN1 synced to system clock */
+#define RME96xx_DS_rd        0x0080000 /* 1=Double Speed, 0=Normal Speed */
+
+#define RME96xx_tc_busy      0x0100000 /* 1=time-code copy in progress (960ms) */
+#define RME96xx_tc_out       0x0200000 /* time-code out bit */
+#define RME96xx_F_0          0x0400000 /*  000=64kHz, 100=88.2kHz, 011=96kHz  */
+#define RME96xx_F_1          0x0800000 /*  111=32kHz, 110=44.1kHz, 101=48kHz, */
+
+#define RME96xx_F_2          0x1000000 /*  001=Rev 1.5+ external Crystal Chip */
+#define RME96xx_ERF          0x2000000 /* Error-Flag of SDPIF Receiver (1=No Lock)*/
+#define RME96xx_buffer_id    0x4000000 /* toggles by each interrupt on rec/play */
+#define RME96xx_tc_valid     0x8000000 /* 1 = a signal is detected on time-code input */
+#define RME96xx_SPDIF_READ  0x10000000 /* byte available from Rev 1.5+ SPDIF interface */
+
+/* Status Register Fields */
+
+#define RME96xx_lock            (RME96xx_lock_0|RME96xx_lock_1|RME96xx_lock_2)
+#define RME96xx_sync            (RME96xx_sync_0|RME96xx_sync_1|RME96xx_sync_2)
+#define RME96xx_F               (RME96xx_F_0|RME96xx_F_1|RME96xx_F_2)
+#define rme96xx_decode_spdif_rate(x) ((x)>>22)
+
+/* Bit 6..15 : h/w buffer pointer */
+#define RME96xx_buf_pos          0x000FFC0 
+/* Bits 31,30,29 are bits 5,4,3 of h/w pointer position on later
+   Rev G EEPROMS and Rev 1.5 cards or later.
+*/ 
+#define RME96xx_REV15_buf_pos(x) ((((x)&0xE0000000)>>26)|((x)&RME96xx_buf_pos))
+
+
+/* Control-Register: */                     
+/*--------------------------------------------------------------------------------*/
+
+#define RME96xx_start_bit       0x0001 /* start record/play */
+#define RME96xx_latency0        0x0002 /* Buffer size / latency */
+#define RME96xx_latency1        0x0004 /*   buffersize = 512Bytes * 2^n */
+#define RME96xx_latency2        0x0008 /*   0=64samples ... 7=8192samples */
+
+#define RME96xx_Master          0x0010 /* Clock Mode 1=Master, 0=Slave/Auto */
+#define RME96xx_IE              0x0020 /* Interupt Enable */
+#define RME96xx_freq            0x0040 /* samplerate 0=44.1/88.2, 1=48/96 kHz*/
+#define RME96xx_freq1           0x0080 /* samplerate 0=32 kHz, 1=other rates ??? (from ALSA, but may be wrong) */
+#define RME96xx_DS              0x0100 /* double speed 0=44.1/48, 1=88.2/96 Khz */
+#define RME96xx_PRO             0x0200 /* SPDIF-OUT 0=consumer, 1=professional */
+#define RME96xx_EMP             0x0400 /* SPDIF-OUT emphasis 0=off, 1=on */
+#define RME96xx_Dolby           0x0800 /* SPDIF-OUT non-audio bit 1=set, 0=unset */
+
+#define RME96xx_opt_out         0x1000 /* use 1st optical OUT as SPDIF: 1=yes, 0=no */
+#define RME96xx_wsel            0x2000 /* use Wordclock as sync (overwrites master) */
+#define RME96xx_inp_0           0x4000 /* SPDIF-IN 00=optical (ADAT1), */
+#define RME96xx_inp_1           0x8000 /* 01=coaxial (Cinch), 10=internal CDROM */
+
+#define RME96xx_SyncRef0       0x10000 /* preferred sync-source in autosync */
+#define RME96xx_SyncRef1       0x20000 /* 00=ADAT1, 01=ADAT2, 10=ADAT3, 11=SPDIF */
+
+#define RME96xx_SPDIF_RESET    (1<<18) /* Rev 1.5+: h/w SPDIF receiver */
+#define RME96xx_SPDIF_SELECT   (1<<19)
+#define RME96xx_SPDIF_CLOCK    (1<<20)
+#define RME96xx_SPDIF_WRITE    (1<<21)
+#define RME96xx_ADAT1_INTERNAL (1<<22) /* Rev 1.5+: if set, internal CD connector carries ADAT */
+
+
+#define RME96xx_ctrl_init            (RME96xx_latency0 |\
+                                     RME96xx_Master |\
+                                     RME96xx_inp_1)
+                              
+
+
+/* Control register fields and shortcuts */
+
+#define RME96xx_latency (RME96xx_latency0|RME96xx_latency1|RME96xx_latency2)
+#define RME96xx_inp         (RME96xx_inp_0|RME96xx_inp_1)
+#define RME96xx_SyncRef    (RME96xx_SyncRef0|RME96xx_SyncRef1)
+#define RME96xx_mixer_allowed (RME96xx_Master|RME96xx_PRO|RME96xx_EMP|RME96xx_Dolby|RME96xx_opt_out|RME96xx_wsel|RME96xx_inp|RME96xx_SyncRef|RME96xx_ADAT1_INTERNAL)
+
+/* latency = 512Bytes * 2^n, where n is made from Bit3 ... Bit1  (??? HP20020201) */
+
+#define RME96xx_SET_LATENCY(x)   (((x)&0x7)<<1)
+#define RME96xx_GET_LATENCY(x)   (((x)>>1)&0x7)
+#define RME96xx_SET_inp(x) (((x)&0x3)<<14)
+#define RME96xx_GET_inp(x)   (((x)>>14)&0x3)
+#define RME96xx_SET_SyncRef(x) (((x)&0x3)<<17)
+#define RME96xx_GET_SyncRef(x)   (((x)>>17)&0x3)
+
+
+/* buffer sizes */
+#define RME96xx_BYTES_PER_SAMPLE  4 /* sizeof(u32) */
+#define RME_16K 16*1024
+
+#define RME96xx_DMA_MAX_SAMPLES  (RME_16K)
+#define RME96xx_DMA_MAX_SIZE     (RME_16K * RME96xx_BYTES_PER_SAMPLE)
+#define RME96xx_DMA_MAX_SIZE_ALL (RME96xx_DMA_MAX_SIZE * RME96xx_CHANNELS_PER_CARD)
+
+#define RME96xx_NUM_OF_FRAGMENTS     2
+#define RME96xx_FRAGMENT_MAX_SIZE    (RME96xx_DMA_MAX_SIZE/2)
+#define RME96xx_FRAGMENT_MAX_SAMPLES (RME96xx_DMA_MAX_SAMPLES/2)
+#define RME96xx_MAX_LATENCY       7   /* 16k samples */
+
+
+#define RME96xx_MAX_DEVS 4 /* we provide some OSS stereodevs */
+#define RME96xx_MASK_DEVS 0x3 /* RME96xx_MAX_DEVS-1 */
+
+#define RME_MESS "rme96xx:"
+/*------------------------------------------------------------------------ 
+                  Types, struct and function declarations 
+ ------------------------------------------------------------------------*/
+
+
+/* --------------------------------------------------------------------- */
+
+static const char invalid_magic[] = KERN_CRIT RME_MESS" invalid magic value\n";
+
+#define VALIDATE_STATE(s)                         \
+({                                                \
+        if (!(s) || (s)->magic != RME96xx_MAGIC) { \
+                printk(invalid_magic);            \
+                return -ENXIO;                    \
+        }                                         \
+})
+
+/* --------------------------------------------------------------------- */
+
+
+static struct file_operations rme96xx_audio_fops;
+static struct file_operations rme96xx_mixer_fops;
+static int numcards;
+
+typedef int32_t raw_sample_t;
+
+typedef struct _rme96xx_info {
+
+        /* hardware settings */
+        int magic;
+        struct pci_dev * pcidev; /* pci_dev structure */
+        unsigned long __iomem *iobase;  
+        unsigned int irq;
+
+        /* list of rme96xx devices */
+        struct list_head devs;
+
+        spinlock_t lock;
+
+        u32 *recbuf;             /* memory for rec buffer */
+        u32 *playbuf;            /* memory for play buffer */
+
+        u32 control_register;
+
+        u32 thru_bits; /* thru 1=on, 0=off channel 1=Bit1... channel 26= Bit26 */
+
+        int hw_rev;             /* h/w rev * 10 (i.e. 1.5 has hw_rev = 15) */
+        char *card_name;        /* hammerfall or hammerfall light names */
+
+        int open_count;         /* unused ???   HP20020201 */
+
+        int rate;
+        int latency;
+        unsigned int fragsize;
+        int started;
+
+        int hwptr; /* can be negativ because of pci burst offset  */
+        unsigned int hwbufid;  /* set by interrupt, buffer which is written/read now */
+        
+        struct dmabuf {
+
+                unsigned int format;
+                int formatshift;
+                int inchannels;       /* number of channels for device */
+                int outchannels;       /* number of channels for device */
+                int mono; /* if true, we play mono on 2 channels */
+                int inoffset; /* which channel is considered the first one */
+                int outoffset;
+                
+                /* state */
+                int opened;               /* open() made */
+                int started;              /* first write/read */
+                int mmapped;              /* mmap */
+                int open_mode;
+
+                struct _rme96xx_info *s;  
+
+                /* pointer to read/write position in buffer */
+                unsigned readptr;          
+                unsigned writeptr;          
+
+                unsigned error; /* over/underruns cleared on sync again */
+
+                /* waiting and locking */
+                wait_queue_head_t wait;
+                struct semaphore  open_sem;
+                wait_queue_head_t open_wait;
+
+        } dma[RME96xx_MAX_DEVS]; 
+
+        int dspnum[RME96xx_MAX_DEVS];  /* register with sound subsystem */ 
+        int mixer;  /* register with sound subsystem */ 
+} rme96xx_info;
+
+
+/* fiddling with the card (first level hardware control) */
+
+static inline void rme96xx_set_ctrl(rme96xx_info* s,int mask)
+{
+
+        s->control_register|=mask;
+        writel(s->control_register,s->iobase + RME96xx_control_register);
+
+}
+
+static inline void rme96xx_unset_ctrl(rme96xx_info* s,int mask)
+{
+
+        s->control_register&=(~mask);
+        writel(s->control_register,s->iobase + RME96xx_control_register);
+
+}
+
+static inline int rme96xx_get_sample_rate_status(rme96xx_info* s)
+{
+        int val;
+        u32 status;
+        status = readl(s->iobase + RME96xx_status_register);
+        val = (status & RME96xx_fs48) ? 48000 : 44100;
+        if (status & RME96xx_DS_rd)
+                val *= 2;
+        return val;
+}
+
+static inline int rme96xx_get_sample_rate_ctrl(rme96xx_info* s)
+{
+        int val;
+        val = (s->control_register & RME96xx_freq) ? 48000 : 44100;
+        if (s->control_register & RME96xx_DS)
+                val *= 2;
+        return val;
+}
+
+
+/* code from ALSA card-rme9652.c for rev 1.5 SPDIF receiver   HP 20020201 */
+
+static void rme96xx_spdif_set_bit (rme96xx_info* s, int mask, int onoff)
+{
+        if (onoff) 
+                s->control_register |= mask;
+        else 
+                s->control_register &= ~mask;
+                
+        writel(s->control_register,s->iobase + RME96xx_control_register);
+}
+
+static void rme96xx_spdif_write_byte (rme96xx_info* s, const int val)
+{
+        long mask;
+        long i;
+
+        for (i = 0, mask = 0x80; i < 8; i++, mask >>= 1) {
+                if (val & mask)
+                        rme96xx_spdif_set_bit (s, RME96xx_SPDIF_WRITE, 1);
+                else 
+                        rme96xx_spdif_set_bit (s, RME96xx_SPDIF_WRITE, 0);
+
+                rme96xx_spdif_set_bit (s, RME96xx_SPDIF_CLOCK, 1);
+                rme96xx_spdif_set_bit (s, RME96xx_SPDIF_CLOCK, 0);
+        }
+}
+
+static int rme96xx_spdif_read_byte (rme96xx_info* s)
+{
+        long mask;
+        long val;
+        long i;
+
+        val = 0;
+
+        for (i = 0, mask = 0x80;  i < 8; i++, mask >>= 1) {
+                rme96xx_spdif_set_bit (s, RME96xx_SPDIF_CLOCK, 1);
+                if (readl(s->iobase + RME96xx_status_register) & RME96xx_SPDIF_READ)
+                        val |= mask;
+                rme96xx_spdif_set_bit (s, RME96xx_SPDIF_CLOCK, 0);
+        }
+
+        return val;
+}
+
+static void rme96xx_write_spdif_codec (rme96xx_info* s, const int address, const int data)
+{
+        rme96xx_spdif_set_bit (s, RME96xx_SPDIF_SELECT, 1);
+        rme96xx_spdif_write_byte (s, 0x20);
+        rme96xx_spdif_write_byte (s, address);
+        rme96xx_spdif_write_byte (s, data);
+        rme96xx_spdif_set_bit (s, RME96xx_SPDIF_SELECT, 0);
+}
+
+
+static int rme96xx_spdif_read_codec (rme96xx_info* s, const int address)
+{
+        int ret;
+
+        rme96xx_spdif_set_bit (s, RME96xx_SPDIF_SELECT, 1);
+        rme96xx_spdif_write_byte (s, 0x20);
+        rme96xx_spdif_write_byte (s, address);
+        rme96xx_spdif_set_bit (s, RME96xx_SPDIF_SELECT, 0);
+        rme96xx_spdif_set_bit (s, RME96xx_SPDIF_SELECT, 1);
+
+        rme96xx_spdif_write_byte (s, 0x21);
+        ret = rme96xx_spdif_read_byte (s);
+        rme96xx_spdif_set_bit (s, RME96xx_SPDIF_SELECT, 0);
+
+        return ret;
+}
+
+static void rme96xx_initialize_spdif_receiver (rme96xx_info* s)
+{
+        /* XXX what unsets this ? */
+        /* no idea ???   HP 20020201 */
+
+        s->control_register |= RME96xx_SPDIF_RESET;
+
+        rme96xx_write_spdif_codec (s, 4, 0x40);
+        rme96xx_write_spdif_codec (s, 17, 0x13);
+        rme96xx_write_spdif_codec (s, 6, 0x02);
+}
+
+static inline int rme96xx_spdif_sample_rate (rme96xx_info *s, int *spdifrate)
+{
+        unsigned int rate_bits;
+
+        *spdifrate = 0x1;
+        if (readl(s->iobase + RME96xx_status_register) & RME96xx_ERF) {
+                return -1;      /* error condition */
+        }
+        
+        if (s->hw_rev == 15) {
+
+                int x, y, ret;
+                
+                x = rme96xx_spdif_read_codec (s, 30);
+
+                if (x != 0) 
+                        y = 48000 * 64 / x;
+                else
+                        y = 0;
+
+                if      (y > 30400 && y < 33600)  {ret = 32000; *spdifrate = 0x7;}
+                else if (y > 41900 && y < 46000)  {ret = 44100; *spdifrate = 0x6;}
+                else if (y > 46000 && y < 50400)  {ret = 48000; *spdifrate = 0x5;}
+                else if (y > 60800 && y < 67200)  {ret = 64000; *spdifrate = 0x0;}
+                else if (y > 83700 && y < 92000)  {ret = 88200; *spdifrate = 0x4;}
+                else if (y > 92000 && y < 100000) {ret = 96000; *spdifrate = 0x3;}
+                else                              {ret = 0; *spdifrate = 0x1;}
+                return ret;
+        }
+
+        rate_bits = readl(s->iobase + RME96xx_status_register) & RME96xx_F;
+
+        switch (*spdifrate = rme96xx_decode_spdif_rate(rate_bits)) {
+        case 0x7:
+                return 32000;
+                break;
+
+        case 0x6:
+                return 44100;
+                break;
+
+        case 0x5:
+                return 48000;
+                break;
+
+        case 0x4:
+                return 88200;
+                break;
+
+        case 0x3:
+                return 96000;
+                break;
+
+        case 0x0:
+                return 64000;
+                break;
+
+        default:
+                /* was an ALSA warning ...
+                  snd_printk("%s: unknown S/PDIF input rate (bits = 0x%x)\n",
+                  s->card_name, rate_bits);
+                */
+                return 0;
+                break;
+        }
+}
+
+/* end of code from ALSA card-rme9652.c */
+
+
+
+/* the hwbuf in the status register seems to have some jitter, to get rid of
+   it, we first only let the numbers grow, to be on the secure side we 
+   subtract a certain amount RME96xx_BURSTBYTES from the resulting number */
+
+/* the function returns the hardware pointer in bytes */
+#define RME96xx_BURSTBYTES -64  /* bytes by which hwptr could be off */
+
+static inline int rme96xx_gethwptr(rme96xx_info* s,int exact)
+{
+        unsigned long flags;
+        if (exact) {
+                unsigned int hwp;
+/* the hwptr seems to be rather unreliable :(, so we don't use it */
+                spin_lock_irqsave(&s->lock,flags);
+                
+                hwp  = readl(s->iobase + RME96xx_status_register) & 0xffc0;
+                s->hwptr = (hwp < s->hwptr) ? s->hwptr : hwp;
+//              s->hwptr = hwp;
+
+                spin_unlock_irqrestore(&s->lock,flags);
+                return (s->hwptr+RME96xx_BURSTBYTES) & ((s->fragsize<<1)-1);
+        }
+        return (s->hwbufid ? s->fragsize : 0);
+}
+
+static inline void rme96xx_setlatency(rme96xx_info* s,int l)
+{
+        s->latency = l;
+        s->fragsize = 1<<(8+l);
+        rme96xx_unset_ctrl(s,RME96xx_latency);
+        rme96xx_set_ctrl(s,RME96xx_SET_LATENCY(l));     
+}
+
+
+static void rme96xx_clearbufs(struct dmabuf* dma)
+{
+        int i,j;
+        unsigned long flags;
+
+        /* clear dmabufs */
+        for(i=0;i<devices;i++) {
+                for (j=0;j<dma->outchannels + dma->mono;j++)
+                        memset(&dma->s->playbuf[(dma->outoffset + j)*RME96xx_DMA_MAX_SAMPLES], 
+                               0, RME96xx_DMA_MAX_SIZE);
+        }
+        spin_lock_irqsave(&dma->s->lock,flags);
+        dma->writeptr = 0;
+        dma->readptr = 0;
+        spin_unlock_irqrestore(&dma->s->lock,flags);
+}
+
+static int rme96xx_startcard(rme96xx_info *s,int stop)
+{
+        int i;
+        unsigned long flags;
+
+        COMM       ("startcard");
+        if(s->control_register & RME96xx_IE){
+                /* disable interrupt first */
+                
+                rme96xx_unset_ctrl( s,RME96xx_start_bit );
+                udelay(10);
+                rme96xx_unset_ctrl( s,RME96xx_IE);
+                spin_lock_irqsave(&s->lock,flags); /* timing is critical */
+                s->started = 0;
+                spin_unlock_irqrestore(&s->lock,flags);
+                if (stop) {
+                     COMM("Sound card stopped");
+                     return 1;
+                }
+        }
+        COMM       ("interrupt disabled");
+        /* first initialize all pointers on card */
+        for(i=0;i<RME96xx_num_of_init_regs;i++){
+                writel(0,s->iobase + i);
+                udelay(10); /* ?? */
+        }
+        COMM       ("regs cleaned");
+
+        spin_lock_irqsave(&s->lock,flags); /* timing is critical */
+        udelay(10);
+        s->started = 1;
+        s->hwptr = 0;
+        spin_unlock_irqrestore(&s->lock,flags);
+
+        rme96xx_set_ctrl( s, RME96xx_IE | RME96xx_start_bit);
+
+
+        COMM("Sound card started");
+  
+        return 1;
+}
+
+
+static inline int rme96xx_getospace(struct dmabuf * dma, unsigned int hwp)
+{
+        int cnt;
+        int  swptr;
+        unsigned long flags;
+
+        spin_lock_irqsave(&dma->s->lock,flags); 
+        swptr = dma->writeptr;
+        cnt = (hwp - swptr);
+        
+        if (cnt < 0) {
+             cnt = ((dma->s->fragsize<<1) - swptr);
+        }
+        spin_unlock_irqrestore(&dma->s->lock,flags);
+        return cnt;
+}
+
+static inline int rme96xx_getispace(struct dmabuf * dma, unsigned int hwp)
+{
+        int cnt;
+        int  swptr;
+        unsigned long flags;
+
+        spin_lock_irqsave(&dma->s->lock,flags); 
+        swptr = dma->readptr;
+        cnt = (hwp - swptr);
+         
+        if (cnt < 0) {
+                cnt = ((dma->s->fragsize<<1) - swptr);
+        }
+        spin_unlock_irqrestore(&dma->s->lock,flags);
+        return cnt;
+}
+
+
+static inline int rme96xx_copyfromuser(struct dmabuf* dma,const char __user * buffer,int count,int hop)
+{
+        int swptr = dma->writeptr;
+        switch (dma->format) {
+        case AFMT_S32_BLOCKED:
+        {
+             char __user * buf = (char __user *)buffer;
+             int cnt = count/dma->outchannels;
+             int i;
+             for (i=0;i < dma->outchannels;i++) {
+                  char* hwbuf =(char*) &dma->s->playbuf[(dma->outoffset + i)*RME96xx_DMA_MAX_SAMPLES];
+                  hwbuf+=swptr;
+
+                  if (copy_from_user(hwbuf,buf, cnt))
+                       return -1;
+                  buf+=hop;
+             }
+             swptr+=cnt;
+             break;
+        }
+        case AFMT_S16_LE:
+        {
+             int i,j;
+             int cnt = count/dma->outchannels;
+             for (i=0;i < dma->outchannels + dma->mono;i++) {
+                     short __user * sbuf = (short __user *)buffer + i*(!dma->mono);
+                     short* hwbuf =(short*) &dma->s->playbuf[(dma->outoffset + i)*RME96xx_DMA_MAX_SAMPLES];          
+                     hwbuf+=(swptr>>1);
+                     for (j=0;j<(cnt>>1);j++) {
+                             hwbuf++; /* skip the low 16 bits */
+                             __get_user(*hwbuf++,sbuf++);
+                             sbuf+=(dma->outchannels-1);
+                     }
+             }
+             swptr += (cnt<<1);
+             break;
+        }
+        default:
+             printk(RME_MESS" unsupported format\n");
+             return -1;
+        } /* switch */
+
+        swptr&=((dma->s->fragsize<<1) -1);
+        dma->writeptr = swptr;
+
+        return 0;
+}
+
+/* The count argument is the number of bytes */
+static inline int rme96xx_copytouser(struct dmabuf* dma,const char __user* buffer,int count,int hop)
+{
+        int swptr = dma->readptr;
+        switch (dma->format) {
+        case AFMT_S32_BLOCKED:
+        {
+             char __user * buf = (char __user *)buffer;
+             int cnt = count/dma->inchannels;
+             int i;
+
+             for (i=0;i < dma->inchannels;i++) {
+                  char* hwbuf =(char*) &dma->s->recbuf[(dma->inoffset + i)*RME96xx_DMA_MAX_SAMPLES];
+                  hwbuf+=swptr;
+
+                  if (copy_to_user(buf,hwbuf,cnt))
+                       return -1;
+                  buf+=hop;
+             }
+             swptr+=cnt;
+             break;
+        }
+        case AFMT_S16_LE:
+        {
+             int i,j;
+             int cnt = count/dma->inchannels;
+             for (i=0;i < dma->inchannels;i++) {
+                  short __user * sbuf = (short __user *)buffer + i;
+                  short* hwbuf =(short*) &dma->s->recbuf[(dma->inoffset + i)*RME96xx_DMA_MAX_SAMPLES];       
+                  hwbuf+=(swptr>>1);
+                  for (j=0;j<(cnt>>1);j++) {
+                       hwbuf++;
+                       __put_user(*hwbuf++,sbuf++);
+                       sbuf+=(dma->inchannels-1);
+                  }
+             }
+             swptr += (cnt<<1);
+             break;
+        }
+        default:
+             printk(RME_MESS" unsupported format\n");
+             return -1;
+        } /* switch */
+        
+        swptr&=((dma->s->fragsize<<1) -1);      
+        dma->readptr = swptr;
+        return 0;
+}
+
+
+static irqreturn_t rme96xx_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+        int i;
+        rme96xx_info *s = (rme96xx_info *)dev_id;
+        struct dmabuf *db;
+        u32 status;
+        unsigned long flags;
+
+        status = readl(s->iobase + RME96xx_status_register);
+        if (!(status & RME96xx_IRQ)) {
+                return IRQ_NONE;
+        }
+
+        spin_lock_irqsave(&s->lock,flags);
+        writel(0,s->iobase + RME96xx_irq_clear);
+
+        s->hwbufid = (status & RME96xx_buffer_id)>>26;  
+        if ((status & 0xffc0) <= 256) s->hwptr = 0; 
+        for(i=0;i<devices;i++)
+        {
+                db = &(s->dma[i]);
+                if(db->started > 0)
+                        wake_up(&(db->wait));           
+        }  
+        spin_unlock_irqrestore(&s->lock,flags);
+        return IRQ_HANDLED;
+}
+
+
+
+/*---------------------------------------------------------------------------- 
+ PCI detection and module initialization stuff 
+ ----------------------------------------------------------------------------*/
+
+static void* busmaster_malloc(int size) {
+     int pg; /* 2 s exponent of memory size */
+        char *buf;
+
+        DBG(printk("kernel malloc pages ..\n"));
+        
+        for (pg = 0; PAGE_SIZE * (1 << pg) < size; pg++);
+
+        buf = (char *) __get_free_pages(GFP_KERNEL | GFP_DMA, pg);
+
+        if (buf) {
+                struct page* page, *last_page;
+
+                page = virt_to_page(buf);
+                last_page = virt_to_page(buf + (1 << pg));
+                DBG(printk("setting reserved bit\n"));
+                while (page < last_page) {
+                        SetPageReserved(page);
+                        page++;
+                }
+                return buf;
+        }
+        DBG(printk("allocated %ld",(long)buf));
+        return NULL;
+}
+
+static void busmaster_free(void* ptr,int size) {
+        int pg;
+        struct page* page, *last_page;
+
+        if (ptr == NULL)
+                return;
+
+        for (pg = 0; PAGE_SIZE * (1 << pg) < size; pg++);
+
+        page = virt_to_page(ptr);
+        last_page = page + (1 << pg);
+        while (page < last_page) {
+                ClearPageReserved(page);
+                page++;
+        }
+        DBG(printk("freeing pages\n"));
+        free_pages((unsigned long) ptr, pg);
+        DBG(printk("done\n"));
+}
+
+/* initialize those parts of the info structure which are not pci detectable resources */
+
+static int rme96xx_dmabuf_init(rme96xx_info * s,struct dmabuf* dma,int ioffset,int ooffset) {
+
+        init_MUTEX(&dma->open_sem);
+        init_waitqueue_head(&dma->open_wait);
+        init_waitqueue_head(&dma->wait);
+        dma->s = s; 
+        dma->error = 0;
+
+        dma->format = AFMT_S32_BLOCKED;
+        dma->formatshift = 0;
+        dma->inchannels = dma->outchannels = 1;
+        dma->inoffset = ioffset;
+        dma->outoffset = ooffset;
+
+        dma->opened=0;
+        dma->started=0;
+        dma->mmapped=0;
+        dma->open_mode=0;
+        dma->mono=0;
+
+        rme96xx_clearbufs(dma);
+        return 0;
+}
+
+
+static int rme96xx_init(rme96xx_info* s)
+{
+        int i;
+        int status;
+        unsigned short rev;
+
+        DBG(printk("%s\n", __FUNCTION__));
+        numcards++;
+
+        s->magic = RME96xx_MAGIC; 
+
+        spin_lock_init(&s->lock);
+
+        COMM            ("setup busmaster memory")
+        s->recbuf = busmaster_malloc(RME96xx_DMA_MAX_SIZE_ALL);
+        s->playbuf = busmaster_malloc(RME96xx_DMA_MAX_SIZE_ALL);
+
+        if (!s->recbuf || !s->playbuf) {
+                printk(KERN_ERR RME_MESS" Unable to allocate busmaster memory\n");
+                return -ENODEV;
+        }
+
+        COMM            ("setting rec and playbuffers")
+
+        writel((u32) virt_to_bus(s->recbuf),s->iobase + RME96xx_rec_buffer);
+        writel((u32) virt_to_bus(s->playbuf),s->iobase + RME96xx_play_buffer);
+
+        COMM             ("initializing control register")
+        rme96xx_unset_ctrl(s,0xffffffff);
+        rme96xx_set_ctrl(s,RME96xx_ctrl_init);
+
+
+        COMM              ("setup devices")     
+        for (i=0;i < devices;i++) {
+                struct dmabuf * dma = &s->dma[i];
+                rme96xx_dmabuf_init(s,dma,2*i,2*i);
+        }
+
+        /* code from ALSA card-rme9652.c   HP 20020201 */
+        /* Determine the h/w rev level of the card. This seems like
+           a particularly kludgy way to encode it, but its what RME
+           chose to do, so we follow them ...
+        */
+
+        status = readl(s->iobase + RME96xx_status_register);
+        if (rme96xx_decode_spdif_rate(status&RME96xx_F) == 1) {
+                s->hw_rev = 15;
+        } else {
+                s->hw_rev = 11;
+        }
+
+        /* Differentiate between the standard Hammerfall, and the
+           "Light", which does not have the expansion board. This
+           method comes from information received from Mathhias
+           Clausen at RME. Display the EEPROM and h/w revID where
+           relevant.  
+        */
+
+        pci_read_config_word(s->pcidev, PCI_CLASS_REVISION, &rev);
+        switch (rev & 0xff) {
+        case 8: /* original eprom */
+                if (s->hw_rev == 15) {
+                        s->card_name = "RME Digi9636 (Rev 1.5)";
+                } else {
+                        s->card_name = "RME Digi9636";
+                }
+                break;
+        case 9: /* W36_G EPROM */
+                s->card_name = "RME Digi9636 (Rev G)";
+                break;
+        case 4: /* W52_G EPROM */
+                s->card_name = "RME Digi9652 (Rev G)";
+                break;
+        default:
+        case 3: /* original eprom */
+                if (s->hw_rev == 15) {
+                        s->card_name = "RME Digi9652 (Rev 1.5)";
+                } else {
+                        s->card_name = "RME Digi9652";
+                }
+                break;
+        }
+
+        printk(KERN_INFO RME_MESS" detected %s (hw_rev %d)\n",s->card_name,s->hw_rev); 
+
+        if (s->hw_rev == 15)
+                rme96xx_initialize_spdif_receiver (s);
+
+        s->started = 0;
+        rme96xx_setlatency(s,7);
+
+        printk(KERN_INFO RME_MESS" card %d initialized\n",numcards); 
+        return 0;
+}
+
+
+/* open uses this to figure out which device was opened .. this seems to be 
+   unnecessary complex */
+
+static LIST_HEAD(devs);
+
+static int __devinit rme96xx_probe(struct pci_dev *pcidev, const struct pci_device_id *pciid)
+{
+        int i;
+        rme96xx_info *s;
+
+        DBG(printk("%s\n", __FUNCTION__));
+        
+        if (pcidev->irq == 0) 
+                return -1;
+        if (!pci_dma_supported(pcidev, 0xffffffff)) {
+                printk(KERN_WARNING RME_MESS" architecture does not support 32bit PCI busmaster DMA\n");
+                return -1;
+        }
+        if (!(s = kmalloc(sizeof(rme96xx_info), GFP_KERNEL))) {
+                printk(KERN_WARNING RME_MESS" out of memory\n");
+                return -1;
+        }
+        memset(s, 0, sizeof(rme96xx_info));
+
+        s->pcidev = pcidev;
+        s->iobase = ioremap(pci_resource_start(pcidev, 0),RME96xx_IO_EXTENT);
+        s->irq = pcidev->irq;
+
+        DBG(printk("remapped iobase: %lx irq %d\n",(long)s->iobase,s->irq));
+
+        if (pci_enable_device(pcidev))
+                goto err_irq;
+        if (request_irq(s->irq, rme96xx_interrupt, SA_SHIRQ, "rme96xx", s)) {
+                printk(KERN_ERR RME_MESS" irq %u in use\n", s->irq);
+                goto err_irq;
+        }
+        
+        /* initialize the card */
+
+        i = 0;
+        if (rme96xx_init(s) < 0) {
+                printk(KERN_ERR RME_MESS" initialization failed\n");
+                goto err_devices;
+        }
+        for (i=0;i<devices;i++) {
+                if ((s->dspnum[i] = register_sound_dsp(&rme96xx_audio_fops, -1)) < 0)
+                        goto err_devices;
+        }
+
+        if ((s->mixer = register_sound_mixer(&rme96xx_mixer_fops, -1)) < 0)
+                goto err_devices;
+
+        pci_set_drvdata(pcidev, s);
+        pcidev->dma_mask = 0xffffffff; /* ????? */
+        /* put it into driver list */
+        list_add_tail(&s->devs, &devs);
+
+        DBG(printk("initialization successful\n"));
+        return 0;
+
+        /* error handler */
+ err_devices:
+        while (i--) 
+                unregister_sound_dsp(s->dspnum[i]);
+        free_irq(s->irq,s);
+ err_irq:
+        kfree(s);
+        return -1;
+}
+
+
+static void __devexit rme96xx_remove(struct pci_dev *dev)
+{
+        int i;
+        rme96xx_info *s = pci_get_drvdata(dev);
+
+        if (!s) {
+                printk(KERN_ERR"device structure not valid\n");
+                return ;
+        }
+
+        if (s->started) rme96xx_startcard(s,0);
+
+        i = devices;
+        while (i) {
+                i--;
+                unregister_sound_dsp(s->dspnum[i]);
+        }
+        
+        unregister_sound_mixer(s->mixer);
+        synchronize_irq(s->irq);
+        free_irq(s->irq,s);
+        busmaster_free(s->recbuf,RME96xx_DMA_MAX_SIZE_ALL);
+        busmaster_free(s->playbuf,RME96xx_DMA_MAX_SIZE_ALL);
+        kfree(s);
+        pci_set_drvdata(dev, NULL);
+}
+
+
+#ifndef PCI_VENDOR_ID_RME 
+#define PCI_VENDOR_ID_RME 0x10ee
+#endif
+#ifndef PCI_DEVICE_ID_RME9652
+#define PCI_DEVICE_ID_RME9652 0x3fc4
+#endif
+#ifndef PCI_ANY_ID
+#define PCI_ANY_ID 0
+#endif
+
+static struct pci_device_id id_table[] = {
+        {
+                .vendor    = PCI_VENDOR_ID_RME,
+                .device    = PCI_DEVICE_ID_RME9652,
+                .subvendor = PCI_ANY_ID,
+                .subdevice = PCI_ANY_ID,
+        },
+        { 0, },
+};
+
+MODULE_DEVICE_TABLE(pci, id_table);
+
+static struct pci_driver rme96xx_driver = {
+        .name     =  "rme96xx",
+        .id_table = id_table,
+        .probe    = rme96xx_probe,
+        .remove   = __devexit_p(rme96xx_remove),
+};
+
+static int __init init_rme96xx(void)
+{
+        printk(KERN_INFO RME_MESS" version "RMEVERSION" time " __TIME__ " " __DATE__ "\n");
+        devices = ((devices-1) & RME96xx_MASK_DEVS) + 1;
+        printk(KERN_INFO RME_MESS" reserving %d dsp device(s)\n",devices);
+        numcards = 0;
+        return pci_module_init(&rme96xx_driver);
+}
+
+static void __exit cleanup_rme96xx(void)
+{
+        printk(KERN_INFO RME_MESS" unloading\n");
+        pci_unregister_driver(&rme96xx_driver);
+}
+
+module_init(init_rme96xx);
+module_exit(cleanup_rme96xx);
+
+
+
+
+
+/*-------------------------------------------------------------------------- 
+   Implementation of file operations 
+---------------------------------------------------------------------------*/
+
+#define RME96xx_FMT (AFMT_S16_LE|AFMT_U8|AFMT_S32_BLOCKED)
+/* AFTM_U8 is not (yet?) supported ...  HP20020201 */
+
+static int rme96xx_ioctl(struct inode *in, struct file *file, unsigned int cmd, unsigned long arg)
+{
+        struct dmabuf * dma = (struct dmabuf *)file->private_data; 
+        rme96xx_info *s = dma->s;
+        unsigned long flags;
+        audio_buf_info abinfo;
+        count_info cinfo;
+        int count;
+        int val = 0;
+        void __user *argp = (void __user *)arg;
+        int __user *p = argp;
+
+        VALIDATE_STATE(s);
+
+        DBG(printk("ioctl %ud\n",cmd));
+
+        switch (cmd) {
+        case OSS_GETVERSION:
+                return put_user(SOUND_VERSION, p);
+
+        case SNDCTL_DSP_SYNC:
+#if 0
+                if (file->f_mode & FMODE_WRITE)
+                        return drain_dac2(s, 0/*file->f_flags & O_NONBLOCK*/);
+#endif
+                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, p);
+                
+        case SNDCTL_DSP_RESET:
+//              rme96xx_clearbufs(dma);
+                return 0;
+
+        case SNDCTL_DSP_SPEED:
+                if (get_user(val, p))
+                        return -EFAULT;
+                if (val >= 0) {
+/* generally it's not a problem if we change the speed 
+                        if (dma->open_mode & (~file->f_mode) & (FMODE_READ|FMODE_WRITE))
+                                return -EINVAL;
+*/
+                        spin_lock_irqsave(&s->lock, flags);
+
+                        switch (val) {
+                        case 44100:
+                        case 88200:
+                                rme96xx_unset_ctrl(s,RME96xx_freq);
+                                break;
+                        case 48000: 
+                        case 96000: 
+                                rme96xx_set_ctrl(s,RME96xx_freq);
+                                break;
+                        /* just report current rate as default
+                           e.g. use 0 to "select" current digital input rate
+                        default:
+                                rme96xx_unset_ctrl(s,RME96xx_freq);
+                                val = 44100;
+                        */
+                        }
+                        if (val > 50000)
+                                rme96xx_set_ctrl(s,RME96xx_DS);
+                        else
+                                rme96xx_unset_ctrl(s,RME96xx_DS);
+                        /* set val to actual value  HP 20020201 */
+                        /* NOTE: if not "Sync Master", reported rate might be not yet "updated" ... but I don't want to insert a long udelay() here */
+                        if ((s->control_register & RME96xx_Master) && !(s->control_register & RME96xx_wsel))
+                                val = rme96xx_get_sample_rate_ctrl(s);
+                        else
+                                val = rme96xx_get_sample_rate_status(s);
+                        s->rate = val;
+                        spin_unlock_irqrestore(&s->lock, flags);
+                }
+                DBG(printk("speed set to %d\n",val));
+                return put_user(val, p);
+                
+        case SNDCTL_DSP_STEREO: /* this plays a mono file on two channels */
+                if (get_user(val, p))
+                        return -EFAULT;
+                
+                if (!val) {
+                        DBG(printk("setting to mono\n")); 
+                        dma->mono=1; 
+                        dma->inchannels = 1;
+                        dma->outchannels = 1;
+                }
+                else {
+                        DBG(printk("setting to stereo\n")); 
+                        dma->mono = 0;
+                        dma->inchannels = 2;
+                        dma->outchannels = 2;
+                }
+                return 0;
+        case SNDCTL_DSP_CHANNELS:
+                /* remember to check for resonable offset/channel pairs here */
+                if (get_user(val, p))
+                        return -EFAULT;
+
+                if (file->f_mode & FMODE_WRITE) {                       
+                        if (val > 0 && (dma->outoffset + val) <= RME96xx_CHANNELS_PER_CARD) 
+                                dma->outchannels = val;
+                        else
+                                dma->outchannels = val = 2;
+                        DBG(printk("setting to outchannels %d\n",val)); 
+                }
+                if (file->f_mode & FMODE_READ) {
+                        if (val > 0 && (dma->inoffset + val) <= RME96xx_CHANNELS_PER_CARD) 
+                                dma->inchannels = val;
+                        else
+                                dma->inchannels = val = 2;
+                        DBG(printk("setting to inchannels %d\n",val)); 
+                }
+
+                dma->mono=0;
+
+                return put_user(val, p);
+                
+        case SNDCTL_DSP_GETFMTS: /* Returns a mask */
+                return put_user(RME96xx_FMT, p);
+                
+        case SNDCTL_DSP_SETFMT: /* Selects ONE fmt*/
+                DBG(printk("setting to format %x\n",val)); 
+                if (get_user(val, p))
+                        return -EFAULT;
+                if (val != AFMT_QUERY) {
+                        if (val & RME96xx_FMT)
+                                dma->format = val;
+                        switch (dma->format) {
+                        case AFMT_S16_LE:
+                                dma->formatshift=1;
+                                break;
+                        case AFMT_S32_BLOCKED:
+                                dma->formatshift=0;
+                                break;
+                        }
+                }
+                return put_user(dma->format, p);
+                
+        case SNDCTL_DSP_POST:
+                return 0;
+
+        case SNDCTL_DSP_GETTRIGGER:
+                val = 0;
+#if 0
+                if (file->f_mode & FMODE_READ && s->ctrl & CTRL_ADC_EN) 
+                        val |= PCM_ENABLE_INPUT;
+                if (file->f_mode & FMODE_WRITE && s->ctrl & CTRL_DAC2_EN) 
+                        val |= PCM_ENABLE_OUTPUT;
+#endif
+                return put_user(val, p);
+                
+        case SNDCTL_DSP_SETTRIGGER:
+                if (get_user(val, p))
+                        return -EFAULT;
+#if 0
+                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_dac2.ready && (ret = prog_dmabuf_dac2(s)))
+                                        return ret;
+                                start_dac2(s);
+                        } else
+                                stop_dac2(s);
+                }
+#endif
+                return 0;
+
+        case SNDCTL_DSP_GETOSPACE:
+                if (!(file->f_mode & FMODE_WRITE))
+                        return -EINVAL;
+
+                val = rme96xx_gethwptr(dma->s,0);
+
+
+                count = rme96xx_getospace(dma,val);
+                if (!s->started) count = s->fragsize*2;
+                abinfo.fragsize =(s->fragsize*dma->outchannels)>>dma->formatshift;
+                abinfo.bytes = (count*dma->outchannels)>>dma->formatshift;
+                abinfo.fragstotal = 2;
+                abinfo.fragments = (count > s->fragsize); 
+
+                return copy_to_user(argp, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
+
+        case SNDCTL_DSP_GETISPACE:
+                if (!(file->f_mode & FMODE_READ))
+                        return -EINVAL;
+
+                val = rme96xx_gethwptr(dma->s,0);
+
+                count = rme96xx_getispace(dma,val);
+
+                abinfo.fragsize = (s->fragsize*dma->inchannels)>>dma->formatshift;
+                abinfo.bytes = (count*dma->inchannels)>>dma->formatshift;
+                abinfo.fragstotal = 2;
+                abinfo.fragments = count > s->fragsize; 
+                return copy_to_user(argp, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
+                
+        case SNDCTL_DSP_NONBLOCK:
+                file->f_flags |= O_NONBLOCK;
+                return 0;
+
+        case SNDCTL_DSP_GETODELAY: /* What should this exactly do ? ,
+                                      ATM it is just abinfo.bytes */
+                if (!(file->f_mode & FMODE_WRITE))
+                        return -EINVAL;
+
+                val = rme96xx_gethwptr(dma->s,0);
+                count = val - dma->readptr;
+                if (count < 0)
+                        count += s->fragsize<<1;
+
+                return put_user(count, p);
+
+
+/* check out how to use mmaped mode (can only be blocked !!!) */
+        case SNDCTL_DSP_GETIPTR:
+                if (!(file->f_mode & FMODE_READ))
+                        return -EINVAL;
+                val = rme96xx_gethwptr(dma->s,0);
+                spin_lock_irqsave(&s->lock,flags);
+                cinfo.bytes = s->fragsize<<1;
+                count = val - dma->readptr;
+                if (count < 0)
+                        count += s->fragsize<<1;
+
+                cinfo.blocks = (count > s->fragsize); 
+                cinfo.ptr = val;
+                if (dma->mmapped)
+                        dma->readptr &= s->fragsize<<1;
+                spin_unlock_irqrestore(&s->lock,flags);
+
+                if (copy_to_user(argp, &cinfo, sizeof(cinfo)))
+                        return -EFAULT;
+                return 0;
+
+        case SNDCTL_DSP_GETOPTR:
+                if (!(file->f_mode & FMODE_READ))
+                        return -EINVAL;
+                val = rme96xx_gethwptr(dma->s,0);
+                spin_lock_irqsave(&s->lock,flags);
+                cinfo.bytes = s->fragsize<<1;
+                count = val - dma->writeptr;
+                if (count < 0)
+                        count += s->fragsize<<1;
+
+                cinfo.blocks = (count > s->fragsize); 
+                cinfo.ptr = val;
+                if (dma->mmapped)
+                        dma->writeptr &= s->fragsize<<1;
+                spin_unlock_irqrestore(&s->lock,flags);
+                if (copy_to_user(argp, &cinfo, sizeof(cinfo)))
+                        return -EFAULT;
+                return 0;
+        case SNDCTL_DSP_GETBLKSIZE:
+             return put_user(s->fragsize, p);
+
+        case SNDCTL_DSP_SETFRAGMENT:
+                if (get_user(val, p))
+                        return -EFAULT;
+                val&=0xffff;
+                val -= 7;
+                if (val < 0) val = 0;
+                if (val > 7) val = 7;
+                rme96xx_setlatency(s,val);
+                return 0;
+
+        case SNDCTL_DSP_SUBDIVIDE:
+#if 0
+                if ((file->f_mode & FMODE_READ && s->dma_adc.subdivision) ||
+                    (file->f_mode & FMODE_WRITE && s->dma_dac2.subdivision))
+                        return -EINVAL;
+                if (get_user(val, p))
+                        return -EFAULT;
+                if (val != 1 && val != 2 && val != 4)
+                        return -EINVAL;
+                if (file->f_mode & FMODE_READ)
+                        s->dma_adc.subdivision = val;
+                if (file->f_mode & FMODE_WRITE)
+                        s->dma_dac2.subdivision = val;
+#endif          
+                return 0;
+
+        case SOUND_PCM_READ_RATE:
+                /* HP20020201 */
+                s->rate = rme96xx_get_sample_rate_status(s);
+                return put_user(s->rate, p);
+
+        case SOUND_PCM_READ_CHANNELS:
+                return put_user(dma->outchannels, p);
+
+        case SOUND_PCM_READ_BITS:
+                switch (dma->format) {
+                        case AFMT_S32_BLOCKED:
+                                val = 32;
+                                break;
+                        case AFMT_S16_LE:
+                                val = 16;
+                                break;
+                }
+                return put_user(val, p);
+
+        case SOUND_PCM_WRITE_FILTER:
+        case SNDCTL_DSP_SETSYNCRO:
+        case SOUND_PCM_READ_FILTER:
+                return -EINVAL;
+                
+        }
+
+
+        return -ENODEV;
+}
+
+
+
+static int rme96xx_open(struct inode *in, struct file *f)
+{
+        int minor = iminor(in);
+        struct list_head *list;
+        int devnum;
+        rme96xx_info *s;
+        struct dmabuf* dma;
+        DECLARE_WAITQUEUE(wait, current); 
+
+        DBG(printk("device num %d open\n",devnum));
+
+        nonseekable_open(in, f);
+        for (list = devs.next; ; list = list->next) {
+                if (list == &devs)
+                        return -ENODEV;
+                s = list_entry(list, rme96xx_info, devs);
+                for (devnum=0; devnum<devices; devnum++)
+                        if (!((s->dspnum[devnum] ^ minor) & ~0xf)) 
+                                break;
+                if (devnum<devices)
+                        break;
+        }
+        VALIDATE_STATE(s);
+
+        dma = &s->dma[devnum];
+        f->private_data = dma;
+        /* wait for device to become free */
+        down(&dma->open_sem);
+        while (dma->open_mode & f->f_mode) {
+                if (f->f_flags & O_NONBLOCK) {
+                        up(&dma->open_sem);
+                        return -EBUSY;
+                }
+                add_wait_queue(&dma->open_wait, &wait);
+                __set_current_state(TASK_INTERRUPTIBLE);
+                up(&dma->open_sem);
+                schedule();
+                remove_wait_queue(&dma->open_wait, &wait);
+                set_current_state(TASK_RUNNING);
+                if (signal_pending(current))
+                        return -ERESTARTSYS;
+                down(&dma->open_sem);
+        }
+
+        COMM                ("hardware open")
+
+        if (!dma->opened) rme96xx_dmabuf_init(dma->s,dma,dma->inoffset,dma->outoffset);
+
+        dma->open_mode |= (f->f_mode & (FMODE_READ | FMODE_WRITE));
+        dma->opened = 1;
+        up(&dma->open_sem);
+
+        DBG(printk("device num %d open finished\n",devnum));
+        return 0;
+}
+
+static int rme96xx_release(struct inode *in, struct file *file)
+{
+        struct dmabuf * dma = (struct dmabuf*) file->private_data;
+        /* int hwp;  ... was unused   HP20020201 */
+        DBG(printk("%s\n", __FUNCTION__));
+
+        COMM          ("draining")
+        if (dma->open_mode & FMODE_WRITE) {
+#if 0 /* Why doesn't this work with some cards ?? */
+             hwp = rme96xx_gethwptr(dma->s,0);
+             while (rme96xx_getospace(dma,hwp)) {
+                  interruptible_sleep_on(&(dma->wait));
+                  hwp = rme96xx_gethwptr(dma->s,0);
+             }
+#endif
+             rme96xx_clearbufs(dma);
+        }
+
+        dma->open_mode &= (~file->f_mode) & (FMODE_READ|FMODE_WRITE);
+
+        if (!(dma->open_mode & (FMODE_READ|FMODE_WRITE))) {
+             dma->opened = 0;
+             if (dma->s->started) rme96xx_startcard(dma->s,1);
+        }
+
+        wake_up(&dma->open_wait);
+        up(&dma->open_sem);
+
+        return 0;
+}
+
+
+static ssize_t rme96xx_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
+{
+        struct dmabuf *dma = (struct dmabuf *)file->private_data;
+        ssize_t ret = 0;
+        int cnt; /* number of bytes from "buffer" that will/can be used */
+        int hop = count/dma->outchannels;
+        int hwp;
+        int exact = (file->f_flags & O_NONBLOCK); 
+
+
+        if(dma == NULL || (dma->s) == NULL) 
+                return -ENXIO;
+
+        if (dma->mmapped || !dma->opened)
+                return -ENXIO;
+
+        if (!access_ok(VERIFY_READ, buffer, count))
+                return -EFAULT;
+
+        if (! (dma->open_mode  & FMODE_WRITE))
+                return -ENXIO;
+
+        if (!dma->s->started) rme96xx_startcard(dma->s,exact);
+        hwp = rme96xx_gethwptr(dma->s,0);
+
+        if(!(dma->started)){             
+                COMM          ("first write")
+                        
+                dma->readptr = hwp;
+                dma->writeptr = hwp;
+                dma->started = 1;
+        }
+
+        while (count > 0) {
+                cnt = rme96xx_getospace(dma,hwp);               
+                cnt>>=dma->formatshift;
+                cnt*=dma->outchannels;
+                if (cnt > count)
+                        cnt = count;
+
+                if (cnt != 0) {
+                        if (rme96xx_copyfromuser(dma,buffer,cnt,hop))
+                                return ret ? ret : -EFAULT;
+                        count -= cnt;
+                        buffer += cnt;
+                        ret += cnt;
+                        if (count == 0) return ret;
+                }
+                if (file->f_flags & O_NONBLOCK)
+                        return ret ? ret : -EAGAIN;
+                
+                if ((hwp - dma->writeptr) <= 0) {
+                        interruptible_sleep_on(&(dma->wait));
+                        
+                        if (signal_pending(current))
+                                return ret ? ret : -ERESTARTSYS;
+                }                       
+
+                hwp = rme96xx_gethwptr(dma->s,exact);
+
+        }; /* count > 0 */
+
+        return ret;
+}
+
+static ssize_t rme96xx_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos)
+{ 
+        struct dmabuf *dma = (struct dmabuf *)file->private_data;
+        ssize_t ret = 0;
+        int cnt; /* number of bytes from "buffer" that will/can be used */
+        int hop = count/dma->inchannels;
+        int hwp;
+        int exact = (file->f_flags & O_NONBLOCK); 
+
+
+        if(dma == NULL || (dma->s) == NULL) 
+                return -ENXIO;
+
+        if (dma->mmapped || !dma->opened)
+                return -ENXIO;
+
+        if (!access_ok(VERIFY_WRITE, buffer, count))
+                return -EFAULT;
+
+        if (! (dma->open_mode  & FMODE_READ))
+                return -ENXIO;
+
+        if (!dma->s->started) rme96xx_startcard(dma->s,exact);
+        hwp = rme96xx_gethwptr(dma->s,0);
+
+        if(!(dma->started)){             
+                COMM          ("first read")
+                     
+                dma->writeptr = hwp;
+                dma->readptr = hwp;
+                dma->started = 1;
+        }
+
+        while (count > 0) {
+                cnt = rme96xx_getispace(dma,hwp);               
+                cnt>>=dma->formatshift;
+                cnt*=dma->inchannels;
+
+                if (cnt > count)
+                        cnt = count;
+
+                if (cnt != 0) {
+                        
+                        if (rme96xx_copytouser(dma,buffer,cnt,hop))
+                                return ret ? ret : -EFAULT;
+                        
+                        count -= cnt;
+                        buffer += cnt;
+                        ret += cnt;
+                        if (count == 0) return ret;
+                }
+                if (file->f_flags & O_NONBLOCK)
+                        return ret ? ret : -EAGAIN;
+                
+                if ((hwp - dma->readptr) <= 0) {
+                        interruptible_sleep_on(&(dma->wait));
+                        
+                        if (signal_pending(current))
+                                return ret ? ret : -ERESTARTSYS;
+                }                       
+                hwp = rme96xx_gethwptr(dma->s,exact);
+
+        }; /* count > 0 */
+
+        return ret;
+}
+
+static int rm96xx_mmap(struct file *file, struct vm_area_struct *vma) {
+        struct dmabuf *dma = (struct dmabuf *)file->private_data;
+        rme96xx_info* s = dma->s;
+        unsigned long size;
+
+        VALIDATE_STATE(s);
+        lock_kernel();
+
+        if (vma->vm_pgoff != 0) {
+                unlock_kernel();
+                return -EINVAL;
+        }
+        size = vma->vm_end - vma->vm_start;
+        if (size > RME96xx_DMA_MAX_SIZE) {
+                unlock_kernel();
+                return -EINVAL;
+        }
+
+
+        if (vma->vm_flags & VM_WRITE) {
+                if (!s->started) rme96xx_startcard(s,1);
+
+                if (remap_pfn_range(vma, vma->vm_start, virt_to_phys(s->playbuf + dma->outoffset*RME96xx_DMA_MAX_SIZE) >> PAGE_SHIFT, size, vma->vm_page_prot)) {
+                        unlock_kernel();
+                        return -EAGAIN;
+                }
+        } 
+        else if (vma->vm_flags & VM_READ) {
+                if (!s->started) rme96xx_startcard(s,1);
+                if (remap_pfn_range(vma, vma->vm_start, virt_to_phys(s->playbuf + dma->inoffset*RME96xx_DMA_MAX_SIZE) >> PAGE_SHIFT, size, vma->vm_page_prot)) {
+                        unlock_kernel();
+                        return -EAGAIN;
+                }
+        } else  {
+                unlock_kernel();
+                return -EINVAL;
+        }
+
+
+/* this is the mapping */
+        vma->vm_flags &= ~VM_IO;
+        dma->mmapped = 1;
+        unlock_kernel();
+        return 0;
+}
+
+static unsigned int rme96xx_poll(struct file *file, struct poll_table_struct *wait)
+{
+        struct dmabuf *dma = (struct dmabuf *)file->private_data;
+        rme96xx_info* s = dma->s;
+        unsigned int mask = 0;
+        unsigned int hwp,cnt;
+
+        DBG(printk("rme96xx poll_wait ...\n"));
+        VALIDATE_STATE(s);
+
+        if (!s->started) {
+                  mask |= POLLOUT | POLLWRNORM;
+        }
+        poll_wait(file, &dma->wait, wait);
+
+        hwp = rme96xx_gethwptr(dma->s,0);
+
+        DBG(printk("rme96xx poll: ..cnt %d > %d\n",cnt,s->fragsize));   
+
+        cnt = rme96xx_getispace(dma,hwp);
+
+        if (file->f_mode & FMODE_READ) 
+             if (cnt > 0)
+                  mask |= POLLIN | POLLRDNORM;
+
+
+
+        cnt = rme96xx_getospace(dma,hwp);
+
+        if (file->f_mode & FMODE_WRITE) 
+             if (cnt > 0)
+                  mask |= POLLOUT | POLLWRNORM;
+
+
+//        printk("rme96xx poll_wait ...%d > %d\n",rme96xx_getospace(dma,hwp),rme96xx_getispace(dma,hwp));
+
+        return mask;
+}
+
+
+static struct file_operations rme96xx_audio_fops = {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+        .owner   = THIS_MODULE,
+#endif
+        .read    = rme96xx_read,
+        .write   = rme96xx_write,
+        .poll    = rme96xx_poll,
+        .ioctl   = rme96xx_ioctl,  
+        .mmap    = rm96xx_mmap,
+        .open    = rme96xx_open,  
+        .release = rme96xx_release 
+};
+
+static int rme96xx_mixer_open(struct inode *inode, struct file *file)
+{
+        int minor = iminor(inode);
+        struct list_head *list;
+        rme96xx_info *s;
+
+        COMM  ("mixer open");
+
+        nonseekable_open(inode, file);
+        for (list = devs.next; ; list = list->next) {
+                if (list == &devs)
+                        return -ENODEV;
+                s = list_entry(list, rme96xx_info, devs);
+                if (s->mixer== minor)
+                        break;
+        }
+        VALIDATE_STATE(s);
+        file->private_data = s;
+
+        COMM                       ("mixer opened")
+        return 0;
+}
+
+static int rme96xx_mixer_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+{
+        rme96xx_info *s = (rme96xx_info *)file->private_data;
+        u32 status;
+        int spdifrate;
+        void __user *argp = (void __user *)arg;
+        int __user *p = argp;
+
+        status = readl(s->iobase + RME96xx_status_register);
+        /* hack to convert rev 1.5 SPDIF rate to "crystalrate" format   HP 20020201 */
+        rme96xx_spdif_sample_rate(s,&spdifrate);
+        status = (status & ~RME96xx_F) | ((spdifrate<<22) & RME96xx_F);
+
+        VALIDATE_STATE(s);
+        if (cmd == SOUND_MIXER_PRIVATE1) {
+                rme_mixer mixer;
+                if (copy_from_user(&mixer,argp,sizeof(mixer)))
+                        return -EFAULT;
+                
+                mixer.devnr &= RME96xx_MASK_DEVS;
+                if (mixer.devnr >= devices)
+                        mixer.devnr = devices-1;
+                if (file->f_mode & FMODE_WRITE && !s->dma[mixer.devnr].opened) {
+                        /* modify only if device not open */
+                        if (mixer.o_offset < 0)
+                                mixer.o_offset = 0;
+                        if (mixer.o_offset >= RME96xx_CHANNELS_PER_CARD)
+                                mixer.o_offset = RME96xx_CHANNELS_PER_CARD-1;
+                        if (mixer.i_offset < 0)
+                                mixer.i_offset = 0;
+                        if (mixer.i_offset >= RME96xx_CHANNELS_PER_CARD)
+                                mixer.i_offset = RME96xx_CHANNELS_PER_CARD-1;
+                        s->dma[mixer.devnr].outoffset = mixer.o_offset;
+                        s->dma[mixer.devnr].inoffset = mixer.i_offset;
+                }
+
+                mixer.o_offset = s->dma[mixer.devnr].outoffset;
+                mixer.i_offset = s->dma[mixer.devnr].inoffset;
+
+                return copy_to_user(argp, &mixer, sizeof(mixer)) ? -EFAULT : 0;
+        }
+        if (cmd == SOUND_MIXER_PRIVATE2) {
+                return put_user(status, p);
+        }
+        if (cmd == SOUND_MIXER_PRIVATE3) {
+                u32 control;
+                if (copy_from_user(&control,argp,sizeof(control)))
+                        return -EFAULT;
+                if (file->f_mode & FMODE_WRITE) {
+                        s->control_register &= ~RME96xx_mixer_allowed;
+                        s->control_register |= control & RME96xx_mixer_allowed;
+                        writel(control,s->iobase + RME96xx_control_register);
+                }
+
+             return put_user(s->control_register, p);
+        }
+        return -1;
+}
+
+
+
+static int rme96xx_mixer_release(struct inode *inode, struct file *file)
+{
+        return 0;
+}
+
+static /*const*/ struct file_operations rme96xx_mixer_fops = {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+        .owner   = THIS_MODULE,
+#endif
+        .ioctl   = rme96xx_mixer_ioctl,
+        .open    = rme96xx_mixer_open,
+        .release = rme96xx_mixer_release,
+};