1 files changed, 679 insertions, 0 deletions

diff --git a/drivers/atm/ambassador.h b/drivers/atm/ambassador.h
new file mode 100644
index 000000000000..84a93063cfe1
--- /dev/null
+++ b/drivers/atm/ambassador.h
@@ -0,0 +1,679 @@
+/*
+  Madge Ambassador ATM Adapter driver.
+  Copyright (C) 1995-1999  Madge Networks Ltd.
+
+  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+  The GNU GPL is contained in /usr/doc/copyright/GPL on a Debian
+  system and in the file COPYING in the Linux kernel source.
+*/
+
+#ifndef AMBASSADOR_H
+#define AMBASSADOR_H
+
+#include <linux/config.h>
+
+#ifdef CONFIG_ATM_AMBASSADOR_DEBUG
+#define DEBUG_AMBASSADOR
+#endif
+
+#define DEV_LABEL                          "amb"
+
+#ifndef PCI_VENDOR_ID_MADGE
+#define PCI_VENDOR_ID_MADGE                0x10B6
+#endif
+#ifndef PCI_VENDOR_ID_MADGE_AMBASSADOR
+#define PCI_DEVICE_ID_MADGE_AMBASSADOR     0x1001
+#endif
+#ifndef PCI_VENDOR_ID_MADGE_AMBASSADOR_BAD
+#define PCI_DEVICE_ID_MADGE_AMBASSADOR_BAD 0x1002
+#endif
+
+// diagnostic output
+
+#define PRINTK(severity,format,args...) \
+  printk(severity DEV_LABEL ": " format "\n" , ## args)
+
+#ifdef DEBUG_AMBASSADOR
+
+#define DBG_ERR  0x0001
+#define DBG_WARN 0x0002
+#define DBG_INFO 0x0004
+#define DBG_INIT 0x0008
+#define DBG_LOAD 0x0010
+#define DBG_VCC  0x0020
+#define DBG_QOS  0x0040
+#define DBG_CMD  0x0080
+#define DBG_TX   0x0100
+#define DBG_RX   0x0200
+#define DBG_SKB  0x0400
+#define DBG_POOL 0x0800
+#define DBG_IRQ  0x1000
+#define DBG_FLOW 0x2000
+#define DBG_REGS 0x4000
+#define DBG_DATA 0x8000
+#define DBG_MASK 0xffff
+
+/* the ## prevents the annoying double expansion of the macro arguments */
+/* KERN_INFO is used since KERN_DEBUG often does not make it to the console */
+#define PRINTDB(bits,format,args...) \
+  ( (debug & (bits)) ? printk (KERN_INFO DEV_LABEL ": " format , ## args) : 1 )
+#define PRINTDM(bits,format,args...) \
+  ( (debug & (bits)) ? printk (format , ## args) : 1 )
+#define PRINTDE(bits,format,args...) \
+  ( (debug & (bits)) ? printk (format "\n" , ## args) : 1 )
+#define PRINTD(bits,format,args...) \
+  ( (debug & (bits)) ? printk (KERN_INFO DEV_LABEL ": " format "\n" , ## args) : 1 )
+
+#else
+
+#define PRINTD(bits,format,args...)
+#define PRINTDB(bits,format,args...)
+#define PRINTDM(bits,format,args...)
+#define PRINTDE(bits,format,args...)
+
+#endif
+
+#define PRINTDD(bits,format,args...)
+#define PRINTDDB(sec,fmt,args...)
+#define PRINTDDM(sec,fmt,args...)
+#define PRINTDDE(sec,fmt,args...)
+
+// tunable values (?)
+
+/* MUST be powers of two -- why ? */
+#define COM_Q_ENTRIES        8
+#define TX_Q_ENTRIES        32
+#define RX_Q_ENTRIES        64
+
+// fixed values
+
+// guessing
+#define AMB_EXTENT         0x80
+
+// Minimum allowed size for an Ambassador queue
+#define MIN_QUEUE_SIZE     2
+
+// Ambassador microcode allows 1 to 4 pools, we use 4 (simpler)
+#define NUM_RX_POOLS       4
+
+// minimum RX buffers required to cope with replenishing delay
+#define MIN_RX_BUFFERS     1
+
+// minimum PCI latency we will tolerate (32 IS TOO SMALL)
+#define MIN_PCI_LATENCY   64 // 255
+
+// VCs supported by card (VPI always 0)
+#define NUM_VPI_BITS       0
+#define NUM_VCI_BITS      10
+#define NUM_VCS         1024
+
+/* The status field bits defined so far. */
+#define RX_ERR          0x8000 // always present if there is an error (hmm)
+#define CRC_ERR         0x4000 // AAL5 CRC error
+#define LEN_ERR         0x2000 // overlength frame
+#define ABORT_ERR       0x1000 // zero length field in received frame
+#define UNUSED_ERR      0x0800 // buffer returned unused
+
+// Adaptor commands
+
+#define SRB_OPEN_VC             0
+/* par_0: dwordswap(VC_number) */
+/* par_1: dwordswap(flags<<16) or wordswap(flags)*/ 
+/* flags:               */
+
+/* LANE:        0x0004          */
+/* NOT_UBR:     0x0008          */
+/* ABR:         0x0010          */
+
+/* RxPool0:     0x0000          */
+/* RxPool1:     0x0020          */
+/* RxPool2:     0x0040          */
+/* RxPool3:     0x0060          */
+
+/* par_2: dwordswap(fp_rate<<16) or wordswap(fp_rate) */
+
+#define SRB_CLOSE_VC            1
+/* par_0: dwordswap(VC_number) */
+
+#define SRB_GET_BIA             2
+/* returns              */
+/* par_0: dwordswap(half BIA) */
+/* par_1: dwordswap(half BIA) */
+
+#define SRB_GET_SUNI_STATS      3
+/* par_0: dwordswap(physical_host_address) */
+
+#define SRB_SET_BITS_8          4
+#define SRB_SET_BITS_16         5
+#define SRB_SET_BITS_32         6
+#define SRB_CLEAR_BITS_8        7
+#define SRB_CLEAR_BITS_16       8
+#define SRB_CLEAR_BITS_32       9
+/* par_0: dwordswap(ATMizer address)    */
+/* par_1: dwordswap(mask) */
+
+#define SRB_SET_8               10
+#define SRB_SET_16              11
+#define SRB_SET_32              12
+/* par_0: dwordswap(ATMizer address)    */
+/* par_1: dwordswap(data) */
+
+#define SRB_GET_32              13
+/* par_0: dwordswap(ATMizer address)    */
+/* returns                      */
+/* par_1: dwordswap(ATMizer data) */
+
+#define SRB_GET_VERSION         14
+/* returns              */
+/* par_0: dwordswap(Major Version) */
+/* par_1: dwordswap(Minor Version) */
+
+#define SRB_FLUSH_BUFFER_Q      15
+/* Only flags to define which buffer pool; all others must be zero */
+/* par_0: dwordswap(flags<<16) or wordswap(flags)*/ 
+
+#define SRB_GET_DMA_SPEEDS      16
+/* returns              */
+/* par_0: dwordswap(Read speed (bytes/sec)) */
+/* par_1: dwordswap(Write speed (bytes/sec)) */
+
+#define SRB_MODIFY_VC_RATE      17
+/* par_0: dwordswap(VC_number) */
+/* par_1: dwordswap(fp_rate<<16) or wordswap(fp_rate) */
+
+#define SRB_MODIFY_VC_FLAGS     18
+/* par_0: dwordswap(VC_number) */
+/* par_1: dwordswap(flags<<16) or wordswap(flags)*/ 
+
+/* flags:               */
+
+/* LANE:        0x0004          */
+/* NOT_UBR:     0x0008          */
+/* ABR:         0x0010          */
+
+/* RxPool0:     0x0000          */
+/* RxPool1:     0x0020          */
+/* RxPool2:     0x0040          */
+/* RxPool3:     0x0060          */
+
+#define SRB_RATE_SHIFT          16
+#define SRB_POOL_SHIFT          (SRB_FLAGS_SHIFT+5)
+#define SRB_FLAGS_SHIFT         16
+
+#define SRB_STOP_TASKING        19
+#define SRB_START_TASKING       20
+#define SRB_SHUT_DOWN           21
+#define MAX_SRB                 21
+
+#define SRB_COMPLETE            0xffffffff
+
+#define TX_FRAME                0x80000000
+
+// number of types of SRB MUST be a power of two -- why?
+#define NUM_OF_SRB      32
+
+// number of bits of period info for rate
+#define MAX_RATE_BITS   6
+
+#define TX_UBR          0x0000
+#define TX_UBR_CAPPED   0x0008
+#define TX_ABR          0x0018
+#define TX_FRAME_NOTCAP 0x0000
+#define TX_FRAME_CAPPED 0x8000
+
+#define FP_155_RATE     0x24b1
+#define FP_25_RATE      0x1f9d
+
+/* #define VERSION_NUMBER 0x01000000 // initial release */
+/* #define VERSION_NUMBER 0x01010000 // fixed startup probs PLX MB0 not cleared */
+/* #define VERSION_NUMBER 0x01020000 // changed SUNI reset timings; allowed r/w onchip */
+
+/* #define VERSION_NUMBER 0x01030000 // clear local doorbell int reg on reset */
+/* #define VERSION_NUMBER 0x01040000 // PLX bug work around version PLUS */
+/* remove race conditions on basic interface */
+/* indicate to the host that diagnostics */
+/* have finished; if failed, how and what  */
+/* failed */
+/* fix host memory test to fix PLX bug */
+/* allow flash upgrade and BIA upgrade directly */
+/*  */
+#define VERSION_NUMBER 0x01050025 /* Jason's first hacked version. */
+/* Change in download algorithm */
+
+#define DMA_VALID 0xb728e149 /* completely random */
+
+#define FLASH_BASE 0xa0c00000
+#define FLASH_SIZE 0x00020000                   /* 128K */
+#define BIA_BASE (FLASH_BASE+0x0001c000)        /* Flash Sector 7 */
+#define BIA_ADDRESS ((void *)0xa0c1c000)
+#define PLX_BASE 0xe0000000
+
+typedef enum {
+  host_memory_test = 1,
+  read_adapter_memory,
+  write_adapter_memory,
+  adapter_start,
+  get_version_number,
+  interrupt_host,
+  flash_erase_sector,
+  adap_download_block = 0x20,
+  adap_erase_flash,
+  adap_run_in_iram,
+  adap_end_download
+} loader_command;
+
+#define BAD_COMMAND                     (-1)
+#define COMMAND_IN_PROGRESS             1
+#define COMMAND_PASSED_TEST             2
+#define COMMAND_FAILED_TEST             3
+#define COMMAND_READ_DATA_OK            4
+#define COMMAND_READ_BAD_ADDRESS        5
+#define COMMAND_WRITE_DATA_OK           6
+#define COMMAND_WRITE_BAD_ADDRESS       7
+#define COMMAND_WRITE_FLASH_FAILURE     8
+#define COMMAND_COMPLETE                9
+#define COMMAND_FLASH_ERASE_FAILURE     10
+#define COMMAND_WRITE_BAD_DATA          11
+
+/* bit fields for mailbox[0] return values */
+
+#define GPINT_TST_FAILURE               0x00000001      
+#define SUNI_DATA_PATTERN_FAILURE       0x00000002
+#define SUNI_DATA_BITS_FAILURE          0x00000004
+#define SUNI_UTOPIA_FAILURE             0x00000008
+#define SUNI_FIFO_FAILURE               0x00000010
+#define SRAM_FAILURE                    0x00000020
+#define SELF_TEST_FAILURE               0x0000003f
+
+/* mailbox[1] = 0 in progress, -1 on completion */
+/* mailbox[2] = current test 00 00 test(8 bit) phase(8 bit) */
+/* mailbox[3] = last failure, 00 00 test(8 bit) phase(8 bit) */
+/* mailbox[4],mailbox[5],mailbox[6] random failure values */
+
+/* PLX/etc. memory map including command structure */
+
+/* These registers may also be memory mapped in PCI memory */
+
+#define UNUSED_LOADER_MAILBOXES 6
+
+typedef struct {
+  u32 stuff[16];
+  union {
+    struct {
+      u32 result;
+      u32 ready;
+      u32 stuff[UNUSED_LOADER_MAILBOXES];
+    } loader;
+    struct {
+      u32 cmd_address;
+      u32 tx_address;
+      u32 rx_address[NUM_RX_POOLS];
+      u32 gen_counter;
+      u32 spare;
+    } adapter;
+  } mb;
+  u32 doorbell;
+  u32 interrupt;
+  u32 interrupt_control;
+  u32 reset_control;
+} amb_mem;
+
+/* RESET bit, IRQ (card to host) and doorbell (host to card) enable bits */
+#define AMB_RESET_BITS     0x40000000
+#define AMB_INTERRUPT_BITS 0x00000300
+#define AMB_DOORBELL_BITS  0x00030000
+
+/* loader commands */
+
+#define MAX_COMMAND_DATA 13
+#define MAX_TRANSFER_DATA 11
+
+typedef struct {
+  __be32 address;
+  __be32 count;
+  __be32 data[MAX_TRANSFER_DATA];
+} transfer_block;
+
+typedef struct {
+  __be32 result;
+  __be32 command;
+  union {
+    transfer_block transfer;
+    __be32 version;
+    __be32 start;
+    __be32 data[MAX_COMMAND_DATA];
+  } payload;
+  __be32 valid;
+} loader_block;
+
+/* command queue */
+
+/* Again all data are BIG ENDIAN */
+
+typedef struct {
+  union {
+    struct {
+      __be32 vc;
+      __be32 flags;
+      __be32 rate;
+    } open;
+    struct {
+      __be32 vc;
+      __be32 rate;
+    } modify_rate;
+    struct {
+      __be32 vc;
+      __be32 flags;
+    } modify_flags;
+    struct {
+      __be32 vc;
+    } close;
+    struct {
+      __be32 lower4;
+      __be32 upper2;
+    } bia;
+    struct {
+      __be32 address;
+    } suni;
+    struct {
+      __be32 major;
+      __be32 minor;
+    } version;
+    struct {
+      __be32 read;
+      __be32 write;
+    } speed;
+    struct {
+      __be32 flags;
+    } flush;
+    struct {
+      __be32 address;
+      __be32 data;
+    } memory;
+    __be32 par[3];
+  } args;
+  __be32 request;
+} command;
+
+/* transmit queues and associated structures */
+
+/* The hosts transmit structure. All BIG ENDIAN; host address
+   restricted to first 1GByte, but address passed to the card must
+   have the top MS bit or'ed in. -- check this */
+
+/* TX is described by 1+ tx_frags followed by a tx_frag_end */
+
+typedef struct {
+  __be32 bytes;
+  __be32 address;
+} tx_frag;
+
+/* apart from handle the fields here are for the adapter to play with
+   and should be set to zero */
+
+typedef struct {
+  u32   handle;
+  u16   vc;
+  u16   next_descriptor_length;
+  u32   next_descriptor;
+#ifdef AMB_NEW_MICROCODE
+  u8    cpcs_uu;
+  u8    cpi;
+  u16   pad;
+#endif
+} tx_frag_end;
+
+typedef struct {
+  tx_frag tx_frag;
+  tx_frag_end tx_frag_end;
+  struct sk_buff * skb;
+} tx_simple;
+
+#if 0
+typedef union {
+  tx_frag       fragment;
+  tx_frag_end   end_of_list;
+} tx_descr;
+#endif
+
+/* this "points" to the sequence of fragments and trailer */
+
+typedef struct {
+  __be16        vc;
+  __be16        tx_descr_length;
+  __be32        tx_descr_addr;
+} tx_in;
+
+/* handle is the handle from tx_in */
+
+typedef struct {
+  u32 handle;
+} tx_out;
+
+/* receive frame structure */
+
+/* All BIG ENDIAN; handle is as passed from host; length is zero for
+   aborted frames, and frames with errors. Header is actually VC
+   number, lec-id is NOT yet supported. */
+
+typedef struct {
+  u32  handle;
+  __be16  vc;
+  __be16  lec_id; // unused
+  __be16  status;
+  __be16  length;
+} rx_out;
+
+/* buffer supply structure */
+
+typedef struct {
+  u32 handle;
+  __be32 host_address;
+} rx_in;
+
+/* This first structure is the area in host memory where the adapter
+   writes its pointer values. These pointer values are BIG ENDIAN and
+   reside in the same 4MB 'page' as this structure. The host gives the
+   adapter the address of this block by sending a doorbell interrupt
+   to the adapter after downloading the code and setting it going. The
+   addresses have the top 10 bits set to 1010000010b -- really?
+   
+   The host must initialise these before handing the block to the
+   adapter. */
+
+typedef struct {
+  __be32 command_start;         /* SRB commands completions */
+  __be32 command_end;           /* SRB commands completions */
+  __be32 tx_start;
+  __be32 tx_end;
+  __be32 txcom_start;           /* tx completions */
+  __be32 txcom_end;             /* tx completions */
+  struct {
+    __be32 buffer_start;
+    __be32 buffer_end;
+    u32 buffer_q_get;
+    u32 buffer_q_end;
+    u32 buffer_aptr;
+    __be32 rx_start;            /* rx completions */
+    __be32 rx_end;
+    u32 rx_ptr;
+    __be32 buffer_size;         /* size of host buffer */
+  } rec_struct[NUM_RX_POOLS];
+#ifdef AMB_NEW_MICROCODE
+  u16 init_flags;
+  u16 talk_block_spare;
+#endif
+} adap_talk_block;
+
+/* This structure must be kept in line with the vcr image in sarmain.h
+   
+   This is the structure in the host filled in by the adapter by
+   GET_SUNI_STATS */
+
+typedef struct {
+  u8    racp_chcs;
+  u8    racp_uhcs;
+  u16   spare;
+  u32   racp_rcell;
+  u32   tacp_tcell;
+  u32   flags;
+  u32   dropped_cells;
+  u32   dropped_frames;
+} suni_stats;
+
+typedef enum {
+  dead
+} amb_flags;
+
+#define NEXTQ(current,start,limit) \
+  ( (current)+1 < (limit) ? (current)+1 : (start) ) 
+
+typedef struct {
+  command * start;
+  command * in;
+  command * out;
+  command * limit;
+} amb_cq_ptrs;
+
+typedef struct {
+  spinlock_t lock;
+  unsigned int pending;
+  unsigned int high;
+  unsigned int filled;
+  unsigned int maximum; // size - 1 (q implementation)
+  amb_cq_ptrs ptrs;
+} amb_cq;
+
+typedef struct {
+  spinlock_t lock;
+  unsigned int pending;
+  unsigned int high;
+  unsigned int filled;
+  unsigned int maximum; // size - 1 (q implementation)
+  struct {
+    tx_in * start;
+    tx_in * ptr;
+    tx_in * limit;
+  } in;
+  struct {
+    tx_out * start;
+    tx_out * ptr;
+    tx_out * limit;
+  } out;
+} amb_txq;
+
+typedef struct {
+  spinlock_t lock;
+  unsigned int pending;
+  unsigned int low;
+  unsigned int emptied;
+  unsigned int maximum; // size - 1 (q implementation)
+  struct {
+    rx_in * start;
+    rx_in * ptr;
+    rx_in * limit;
+  } in;
+  struct {
+    rx_out * start;
+    rx_out * ptr;
+    rx_out * limit;
+  } out;
+  unsigned int buffers_wanted;
+  unsigned int buffer_size;
+} amb_rxq;
+
+typedef struct {
+  unsigned long tx_ok;
+  struct {
+    unsigned long ok;
+    unsigned long error;
+    unsigned long badcrc;
+    unsigned long toolong;
+    unsigned long aborted;
+    unsigned long unused;
+  } rx;
+} amb_stats;
+
+// a single struct pointed to by atm_vcc->dev_data
+
+typedef struct {
+  u8               tx_vc_bits:7;
+  u8               tx_present:1;
+} amb_tx_info;
+
+typedef struct {
+  unsigned char    pool;
+} amb_rx_info;
+
+typedef struct {
+  amb_rx_info      rx_info;
+  u16              tx_frame_bits;
+  unsigned int     tx_rate;
+  unsigned int     rx_rate;
+} amb_vcc;
+
+struct amb_dev {
+  u8               irq;
+  long             flags;
+  u32              iobase;
+  u32 *            membase;
+
+#ifdef FILL_RX_POOLS_IN_BH
+  struct work_struct bh;
+#endif
+  
+  amb_cq           cq;
+  amb_txq          txq;
+  amb_rxq          rxq[NUM_RX_POOLS];
+  
+  struct semaphore vcc_sf;
+  amb_tx_info      txer[NUM_VCS];
+  struct atm_vcc * rxer[NUM_VCS];
+  unsigned int     tx_avail;
+  unsigned int     rx_avail;
+  
+  amb_stats        stats;
+  
+  struct atm_dev * atm_dev;
+  struct pci_dev * pci_dev;
+  struct timer_list housekeeping;
+};
+
+typedef struct amb_dev amb_dev;
+
+#define AMB_DEV(atm_dev) ((amb_dev *) (atm_dev)->dev_data)
+#define AMB_VCC(atm_vcc) ((amb_vcc *) (atm_vcc)->dev_data)
+
+/* the microcode */
+
+typedef struct {
+  u32 start;
+  unsigned int count;
+} region;
+
+static region ucode_regions[];
+static u32 ucode_data[];
+static u32 ucode_start;
+
+/* rate rounding */
+
+typedef enum {
+  round_up,
+  round_down,
+  round_nearest
+} rounding;
+
+#endif