summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/i82586.h
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/wireless/i82586.h')
-rw-r--r--drivers/net/wireless/i82586.h413
1 files changed, 413 insertions, 0 deletions
diff --git a/drivers/net/wireless/i82586.h b/drivers/net/wireless/i82586.h
new file mode 100644
index 0000000..5f65b25
--- /dev/null
+++ b/drivers/net/wireless/i82586.h
@@ -0,0 +1,413 @@
+/*
+ * Intel 82586 IEEE 802.3 Ethernet LAN Coprocessor.
+ *
+ * See:
+ * Intel Microcommunications 1991
+ * p1-1 to p1-37
+ * Intel order No. 231658
+ * ISBN 1-55512-119-5
+ *
+ * Unfortunately, the above chapter mentions neither
+ * the System Configuration Pointer (SCP) nor the
+ * Intermediate System Configuration Pointer (ISCP),
+ * so we probably need to look elsewhere for the
+ * whole story -- some recommend the "Intel LAN
+ * Components manual" but I have neither a copy
+ * nor a full reference. But "elsewhere" may be
+ * in the same publication...
+ * The description of a later device, the
+ * "82596CA High-Performance 32-Bit Local Area Network
+ * Coprocessor", (ibid. p1-38 to p1-109) does mention
+ * the SCP and ISCP and also has an i82586 compatibility
+ * mode. Even more useful is "AP-235 An 82586 Data Link
+ * Driver" (ibid. p1-337 to p1-417).
+ */
+
+#define I82586_MEMZ (64 * 1024)
+
+#define I82586_SCP_ADDR (I82586_MEMZ - sizeof(scp_t))
+
+#define ADDR_LEN 6
+#define I82586NULL 0xFFFF
+
+#define toff(t,p,f) (unsigned short)((void *)(&((t *)((void *)0 + (p)))->f) - (void *)0)
+
+/*
+ * System Configuration Pointer (SCP).
+ */
+typedef struct scp_t scp_t;
+struct scp_t
+{
+ unsigned short scp_sysbus; /* 82586 bus width: */
+#define SCP_SY_16BBUS (0x0 << 0) /* 16 bits */
+#define SCP_SY_8BBUS (0x1 << 0) /* 8 bits. */
+ unsigned short scp_junk[2]; /* Unused */
+ unsigned short scp_iscpl; /* lower 16 bits of ISCP_ADDR */
+ unsigned short scp_iscph; /* upper 16 bits of ISCP_ADDR */
+};
+
+/*
+ * Intermediate System Configuration Pointer (ISCP).
+ */
+typedef struct iscp_t iscp_t;
+struct iscp_t
+{
+ unsigned short iscp_busy; /* set by CPU before first CA, */
+ /* cleared by 82586 after read. */
+ unsigned short iscp_offset; /* offset of SCB */
+ unsigned short iscp_basel; /* base of SCB */
+ unsigned short iscp_baseh; /* " */
+};
+
+/*
+ * System Control Block (SCB).
+ * The 82586 writes its status to scb_status and then
+ * raises an interrupt to alert the CPU.
+ * The CPU writes a command to scb_command and
+ * then issues a Channel Attention (CA) to alert the 82586.
+ */
+typedef struct scb_t scb_t;
+struct scb_t
+{
+ unsigned short scb_status; /* Status of 82586 */
+#define SCB_ST_INT (0xF << 12) /* Some of: */
+#define SCB_ST_CX (0x1 << 15) /* Cmd completed */
+#define SCB_ST_FR (0x1 << 14) /* Frame received */
+#define SCB_ST_CNA (0x1 << 13) /* Cmd unit not active */
+#define SCB_ST_RNR (0x1 << 12) /* Rcv unit not ready */
+#define SCB_ST_JUNK0 (0x1 << 11) /* 0 */
+#define SCB_ST_CUS (0x7 << 8) /* Cmd unit status */
+#define SCB_ST_CUS_IDLE (0 << 8) /* Idle */
+#define SCB_ST_CUS_SUSP (1 << 8) /* Suspended */
+#define SCB_ST_CUS_ACTV (2 << 8) /* Active */
+#define SCB_ST_JUNK1 (0x1 << 7) /* 0 */
+#define SCB_ST_RUS (0x7 << 4) /* Rcv unit status */
+#define SCB_ST_RUS_IDLE (0 << 4) /* Idle */
+#define SCB_ST_RUS_SUSP (1 << 4) /* Suspended */
+#define SCB_ST_RUS_NRES (2 << 4) /* No resources */
+#define SCB_ST_RUS_RDY (4 << 4) /* Ready */
+ unsigned short scb_command; /* Next command */
+#define SCB_CMD_ACK_CX (0x1 << 15) /* Ack cmd completion */
+#define SCB_CMD_ACK_FR (0x1 << 14) /* Ack frame received */
+#define SCB_CMD_ACK_CNA (0x1 << 13) /* Ack CU not active */
+#define SCB_CMD_ACK_RNR (0x1 << 12) /* Ack RU not ready */
+#define SCB_CMD_JUNKX (0x1 << 11) /* Unused */
+#define SCB_CMD_CUC (0x7 << 8) /* Command Unit command */
+#define SCB_CMD_CUC_NOP (0 << 8) /* Nop */
+#define SCB_CMD_CUC_GO (1 << 8) /* Start cbl_offset */
+#define SCB_CMD_CUC_RES (2 << 8) /* Resume execution */
+#define SCB_CMD_CUC_SUS (3 << 8) /* Suspend " */
+#define SCB_CMD_CUC_ABT (4 << 8) /* Abort " */
+#define SCB_CMD_RESET (0x1 << 7) /* Reset chip (hardware) */
+#define SCB_CMD_RUC (0x7 << 4) /* Receive Unit command */
+#define SCB_CMD_RUC_NOP (0 << 4) /* Nop */
+#define SCB_CMD_RUC_GO (1 << 4) /* Start rfa_offset */
+#define SCB_CMD_RUC_RES (2 << 4) /* Resume reception */
+#define SCB_CMD_RUC_SUS (3 << 4) /* Suspend " */
+#define SCB_CMD_RUC_ABT (4 << 4) /* Abort " */
+ unsigned short scb_cbl_offset; /* Offset of first command unit */
+ /* Action Command */
+ unsigned short scb_rfa_offset; /* Offset of first Receive */
+ /* Frame Descriptor in the */
+ /* Receive Frame Area */
+ unsigned short scb_crcerrs; /* Properly aligned frames */
+ /* received with a CRC error */
+ unsigned short scb_alnerrs; /* Misaligned frames received */
+ /* with a CRC error */
+ unsigned short scb_rscerrs; /* Frames lost due to no space */
+ unsigned short scb_ovrnerrs; /* Frames lost due to slow bus */
+};
+
+#define scboff(p,f) toff(scb_t, p, f)
+
+/*
+ * The eight Action Commands.
+ */
+typedef enum acmd_e acmd_e;
+enum acmd_e
+{
+ acmd_nop = 0, /* Do nothing */
+ acmd_ia_setup = 1, /* Load an (ethernet) address into the */
+ /* 82586 */
+ acmd_configure = 2, /* Update the 82586 operating parameters */
+ acmd_mc_setup = 3, /* Load a list of (ethernet) multicast */
+ /* addresses into the 82586 */
+ acmd_transmit = 4, /* Transmit a frame */
+ acmd_tdr = 5, /* Perform a Time Domain Reflectometer */
+ /* test on the serial link */
+ acmd_dump = 6, /* Copy 82586 registers to memory */
+ acmd_diagnose = 7, /* Run an internal self test */
+};
+
+/*
+ * Generic Action Command header.
+ */
+typedef struct ach_t ach_t;
+struct ach_t
+{
+ unsigned short ac_status; /* Command status: */
+#define AC_SFLD_C (0x1 << 15) /* Command completed */
+#define AC_SFLD_B (0x1 << 14) /* Busy executing */
+#define AC_SFLD_OK (0x1 << 13) /* Completed error free */
+#define AC_SFLD_A (0x1 << 12) /* Command aborted */
+#define AC_SFLD_FAIL (0x1 << 11) /* Selftest failed */
+#define AC_SFLD_S10 (0x1 << 10) /* No carrier sense */
+ /* during transmission */
+#define AC_SFLD_S9 (0x1 << 9) /* Tx unsuccessful: */
+ /* (stopped) lost CTS */
+#define AC_SFLD_S8 (0x1 << 8) /* Tx unsuccessful: */
+ /* (stopped) slow DMA */
+#define AC_SFLD_S7 (0x1 << 7) /* Tx deferred: */
+ /* other link traffic */
+#define AC_SFLD_S6 (0x1 << 6) /* Heart Beat: collision */
+ /* detect after last tx */
+#define AC_SFLD_S5 (0x1 << 5) /* Tx stopped: */
+ /* excessive collisions */
+#define AC_SFLD_MAXCOL (0xF << 0) /* Collision count */
+ unsigned short ac_command; /* Command specifier: */
+#define AC_CFLD_EL (0x1 << 15) /* End of command list */
+#define AC_CFLD_S (0x1 << 14) /* Suspend on completion */
+#define AC_CFLD_I (0x1 << 13) /* Interrupt on completion */
+#define AC_CFLD_CMD (0x7 << 0) /* acmd_e */
+ unsigned short ac_link; /* Next Action Command */
+};
+
+#define acoff(p,f) toff(ach_t, p, f)
+
+/*
+ * The Nop Action Command.
+ */
+typedef struct ac_nop_t ac_nop_t;
+struct ac_nop_t
+{
+ ach_t nop_h;
+};
+
+/*
+ * The IA-Setup Action Command.
+ */
+typedef struct ac_ias_t ac_ias_t;
+struct ac_ias_t
+{
+ ach_t ias_h;
+ unsigned char ias_addr[ADDR_LEN]; /* The (ethernet) address */
+};
+
+/*
+ * The Configure Action Command.
+ */
+typedef struct ac_cfg_t ac_cfg_t;
+struct ac_cfg_t
+{
+ ach_t cfg_h;
+ unsigned char cfg_byte_cnt; /* Size foll data: 4-12 */
+#define AC_CFG_BYTE_CNT(v) (((v) & 0xF) << 0)
+ unsigned char cfg_fifolim; /* FIFO threshold */
+#define AC_CFG_FIFOLIM(v) (((v) & 0xF) << 0)
+ unsigned char cfg_byte8;
+#define AC_CFG_SAV_BF(v) (((v) & 0x1) << 7) /* Save rxd bad frames */
+#define AC_CFG_SRDY(v) (((v) & 0x1) << 6) /* SRDY/ARDY pin means */
+ /* external sync. */
+ unsigned char cfg_byte9;
+#define AC_CFG_ELPBCK(v) (((v) & 0x1) << 7) /* External loopback */
+#define AC_CFG_ILPBCK(v) (((v) & 0x1) << 6) /* Internal loopback */
+#define AC_CFG_PRELEN(v) (((v) & 0x3) << 4) /* Preamble length */
+#define AC_CFG_PLEN_2 0 /* 2 bytes */
+#define AC_CFG_PLEN_4 1 /* 4 bytes */
+#define AC_CFG_PLEN_8 2 /* 8 bytes */
+#define AC_CFG_PLEN_16 3 /* 16 bytes */
+#define AC_CFG_ALOC(v) (((v) & 0x1) << 3) /* Addr/len data is */
+ /* explicit in buffers */
+#define AC_CFG_ADDRLEN(v) (((v) & 0x7) << 0) /* Bytes per address */
+ unsigned char cfg_byte10;
+#define AC_CFG_BOFMET(v) (((v) & 0x1) << 7) /* Use alternate expo. */
+ /* backoff method */
+#define AC_CFG_ACR(v) (((v) & 0x7) << 4) /* Accelerated cont. res. */
+#define AC_CFG_LINPRIO(v) (((v) & 0x7) << 0) /* Linear priority */
+ unsigned char cfg_ifs; /* Interframe spacing */
+ unsigned char cfg_slotl; /* Slot time (low byte) */
+ unsigned char cfg_byte13;
+#define AC_CFG_RETRYNUM(v) (((v) & 0xF) << 4) /* Max. collision retry */
+#define AC_CFG_SLTTMHI(v) (((v) & 0x7) << 0) /* Slot time (high bits) */
+ unsigned char cfg_byte14;
+#define AC_CFG_FLGPAD(v) (((v) & 0x1) << 7) /* Pad with HDLC flags */
+#define AC_CFG_BTSTF(v) (((v) & 0x1) << 6) /* Do HDLC bitstuffing */
+#define AC_CFG_CRC16(v) (((v) & 0x1) << 5) /* 16 bit CCITT CRC */
+#define AC_CFG_NCRC(v) (((v) & 0x1) << 4) /* Insert no CRC */
+#define AC_CFG_TNCRS(v) (((v) & 0x1) << 3) /* Tx even if no carrier */
+#define AC_CFG_MANCH(v) (((v) & 0x1) << 2) /* Manchester coding */
+#define AC_CFG_BCDIS(v) (((v) & 0x1) << 1) /* Disable broadcast */
+#define AC_CFG_PRM(v) (((v) & 0x1) << 0) /* Promiscuous mode */
+ unsigned char cfg_byte15;
+#define AC_CFG_ICDS(v) (((v) & 0x1) << 7) /* Internal collision */
+ /* detect source */
+#define AC_CFG_CDTF(v) (((v) & 0x7) << 4) /* Collision detect */
+ /* filter in bit times */
+#define AC_CFG_ICSS(v) (((v) & 0x1) << 3) /* Internal carrier */
+ /* sense source */
+#define AC_CFG_CSTF(v) (((v) & 0x7) << 0) /* Carrier sense */
+ /* filter in bit times */
+ unsigned short cfg_min_frm_len;
+#define AC_CFG_MNFRM(v) (((v) & 0xFF) << 0) /* Min. bytes/frame (<= 255) */
+};
+
+/*
+ * The MC-Setup Action Command.
+ */
+typedef struct ac_mcs_t ac_mcs_t;
+struct ac_mcs_t
+{
+ ach_t mcs_h;
+ unsigned short mcs_cnt; /* No. of bytes of MC addresses */
+#if 0
+ unsigned char mcs_data[ADDR_LEN]; /* The first MC address .. */
+ ...
+#endif
+};
+
+#define I82586_MAX_MULTICAST_ADDRESSES 128 /* Hardware hashed filter */
+
+/*
+ * The Transmit Action Command.
+ */
+typedef struct ac_tx_t ac_tx_t;
+struct ac_tx_t
+{
+ ach_t tx_h;
+ unsigned short tx_tbd_offset; /* Address of list of buffers. */
+#if 0
+Linux packets are passed down with the destination MAC address
+and length/type field already prepended to the data,
+so we do not need to insert it. Consistent with this
+we must also set the AC_CFG_ALOC(..) flag during the
+ac_cfg_t action command.
+ unsigned char tx_addr[ADDR_LEN]; /* The frame dest. address */
+ unsigned short tx_length; /* The frame length */
+#endif /* 0 */
+};
+
+/*
+ * The Time Domain Reflectometer Action Command.
+ */
+typedef struct ac_tdr_t ac_tdr_t;
+struct ac_tdr_t
+{
+ ach_t tdr_h;
+ unsigned short tdr_result; /* Result. */
+#define AC_TDR_LNK_OK (0x1 << 15) /* No link problem */
+#define AC_TDR_XCVR_PRB (0x1 << 14) /* Txcvr cable problem */
+#define AC_TDR_ET_OPN (0x1 << 13) /* Open on the link */
+#define AC_TDR_ET_SRT (0x1 << 12) /* Short on the link */
+#define AC_TDR_TIME (0x7FF << 0) /* Distance to problem */
+ /* site in transmit */
+ /* clock cycles */
+};
+
+/*
+ * The Dump Action Command.
+ */
+typedef struct ac_dmp_t ac_dmp_t;
+struct ac_dmp_t
+{
+ ach_t dmp_h;
+ unsigned short dmp_offset; /* Result. */
+};
+
+/*
+ * Size of the result of the dump command.
+ */
+#define DUMPBYTES 170
+
+/*
+ * The Diagnose Action Command.
+ */
+typedef struct ac_dgn_t ac_dgn_t;
+struct ac_dgn_t
+{
+ ach_t dgn_h;
+};
+
+/*
+ * Transmit Buffer Descriptor (TBD).
+ */
+typedef struct tbd_t tbd_t;
+struct tbd_t
+{
+ unsigned short tbd_status; /* Written by the CPU */
+#define TBD_STATUS_EOF (0x1 << 15) /* This TBD is the */
+ /* last for this frame */
+#define TBD_STATUS_ACNT (0x3FFF << 0) /* Actual count of data */
+ /* bytes in this buffer */
+ unsigned short tbd_next_bd_offset; /* Next in list */
+ unsigned short tbd_bufl; /* Buffer address (low) */
+ unsigned short tbd_bufh; /* " " (high) */
+};
+
+/*
+ * Receive Buffer Descriptor (RBD).
+ */
+typedef struct rbd_t rbd_t;
+struct rbd_t
+{
+ unsigned short rbd_status; /* Written by the 82586 */
+#define RBD_STATUS_EOF (0x1 << 15) /* This RBD is the */
+ /* last for this frame */
+#define RBD_STATUS_F (0x1 << 14) /* ACNT field is valid */
+#define RBD_STATUS_ACNT (0x3FFF << 0) /* Actual no. of data */
+ /* bytes in this buffer */
+ unsigned short rbd_next_rbd_offset; /* Next rbd in list */
+ unsigned short rbd_bufl; /* Data pointer (low) */
+ unsigned short rbd_bufh; /* " " (high) */
+ unsigned short rbd_el_size; /* EL+Data buf. size */
+#define RBD_EL (0x1 << 15) /* This BD is the */
+ /* last in the list */
+#define RBD_SIZE (0x3FFF << 0) /* No. of bytes the */
+ /* buffer can hold */
+};
+
+#define rbdoff(p,f) toff(rbd_t, p, f)
+
+/*
+ * Frame Descriptor (FD).
+ */
+typedef struct fd_t fd_t;
+struct fd_t
+{
+ unsigned short fd_status; /* Written by the 82586 */
+#define FD_STATUS_C (0x1 << 15) /* Completed storing frame */
+#define FD_STATUS_B (0x1 << 14) /* FD was consumed by RU */
+#define FD_STATUS_OK (0x1 << 13) /* Frame rxd successfully */
+#define FD_STATUS_S11 (0x1 << 11) /* CRC error */
+#define FD_STATUS_S10 (0x1 << 10) /* Alignment error */
+#define FD_STATUS_S9 (0x1 << 9) /* Ran out of resources */
+#define FD_STATUS_S8 (0x1 << 8) /* Rx DMA overrun */
+#define FD_STATUS_S7 (0x1 << 7) /* Frame too short */
+#define FD_STATUS_S6 (0x1 << 6) /* No EOF flag */
+ unsigned short fd_command; /* Command */
+#define FD_COMMAND_EL (0x1 << 15) /* Last FD in list */
+#define FD_COMMAND_S (0x1 << 14) /* Suspend RU after rx */
+ unsigned short fd_link_offset; /* Next FD */
+ unsigned short fd_rbd_offset; /* First RBD (data) */
+ /* Prepared by CPU, */
+ /* updated by 82586 */
+#if 0
+I think the rest is unused since we
+have set AC_CFG_ALOC(..). However, just
+in case, we leave the space.
+#endif /* 0 */
+ unsigned char fd_dest[ADDR_LEN]; /* Destination address */
+ /* Written by 82586 */
+ unsigned char fd_src[ADDR_LEN]; /* Source address */
+ /* Written by 82586 */
+ unsigned short fd_length; /* Frame length or type */
+ /* Written by 82586 */
+};
+
+#define fdoff(p,f) toff(fd_t, p, f)
+
+/*
+ * This software may only be used and distributed
+ * according to the terms of the GNU General Public License.
+ *
+ * For more details, see wavelan.c.
+ */
OpenPOWER on IntegriCloud