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/* $OpenBSD: rlnreg.h,v 1.2 1999/08/19 06:15:38 d Exp $ */
/*
* David Leonard <d@openbsd.org>, 1999. Public Domain.
*
* RangeLAN2 registers
*/
/*
* The RangeLAN2 cards provide four control registers for transferring
* messaged between the host and the card using programmed i/o.
*
* A transfer protocol is followed when sending asynchronous messages to,
* and receiving messages from, the card.
*
* DATA
* 7 6 5 4 3 2 1 0
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | data |
* +-------+-------+-------+-------+-------+-------+-------+-------+
*
* STATUS
* 7 6 5 4 3 2 1 0
* +-------+-------+-------+-------+-------+-------+-------+-------+
* |WAKEUP | tx message state |CLRNAK | rx message state |
* +-------+-------+-------+-------+-------+-------+-------+-------+
*
* CONTROL
* 7 6 5 4 3 2 1 0
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | | | 16BIT | RESET | | | TXINT | RXINT |
* +-------+-------+-------+-------+-------+-------+-------+-------+
*
* INTSEL
* 7 6 5 4 3 2 1 0
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | | | |ENABLE | interrupt line |
* +-------+-------+-------+-------+-------+-------+-------+-------+
*/
/* Register offsets. */
#define RLN_REG_DATA 0
#define RLN_REG_STATUS 2
#define RLN_REG_CONTROL 4
#define RLN_REG_EOI 5
#define RLN_REG_INTSEL 6
#define RLN_NPORTS 8
/*
* A short delay is needed (16ms?) after register writes on some cards.
* XXX This is done by performing an innocent and harmless bus read. (i386)
* This is what Proxim's driver does, anyway.
*/
#define _rln_regacc_delay() \
bus_space_read_1(I386_BUS_SPACE_IO, 0, 0x61)
static void _rln_register_write_1 __P((struct rln_softc *, u_int8_t,
u_int8_t));
static void _rln_register_write_2 __P((struct rln_softc *, u_int8_t,
u_int16_t));
static u_int8_t _rln_register_read_1 __P((struct rln_softc *, u_int8_t));
static u_int16_t _rln_register_read_2 __P((struct rln_softc *, u_int8_t));
static int rln_status_rx_ready __P((struct rln_softc *));
/* Write to a register. */
static inline void
_rln_register_write_1(sc, regoff, value)
struct rln_softc *sc;
u_int8_t regoff;
u_int8_t value;
{
#ifdef RLNDEBUG_REG
printf(" %c<%02x", "DDS3CEI7"[regoff], value);
#endif
bus_space_write_1((sc)->sc_iot, (sc)->sc_ioh, (regoff), (value));
_rln_regacc_delay();
}
static inline void
_rln_register_write_2(sc, regoff, value)
struct rln_softc *sc;
u_int8_t regoff;
u_int16_t value;
{
#ifdef RLNDEBUG_REG
printf(" %c<%04x", "DDS3CEI7"[regoff], value);
#endif
bus_space_write_2((sc)->sc_iot, (sc)->sc_ioh, (regoff), (value));
_rln_regacc_delay();
}
/* Read from a register. */
static inline u_int8_t
_rln_register_read_1(sc, regoff)
struct rln_softc *sc;
u_int8_t regoff;
{
u_int8_t ret;
ret = bus_space_read_1((sc)->sc_iot, (sc)->sc_ioh, (regoff));
#ifdef RLNDEBUG_REG
if (ret != (sc)->dbg_oreg[regoff]) {
/* avoid spewing out too much debug info */
printf(" %c>%02x", "DDS3CEI7"[regoff], ret);
(sc)->dbg_oreg[regoff] = ret;
}
#endif
return (ret);
}
static inline u_int16_t
_rln_register_read_2(sc, regoff)
struct rln_softc *sc;
u_int8_t regoff;
{
u_int16_t ret;
ret = bus_space_read_2((sc)->sc_iot, (sc)->sc_ioh, (regoff));
#ifdef RLNDEBUG_REG
if (ret != (sc)->dbg_oreg[regoff]) {
printf(" %c>%04x", "DDS3CEI7"[regoff], ret);
(sc)->dbg_oreg[regoff] = ret;
}
#endif
return (ret);
}
/* 8-bit data register access. */
#define rln_data_write_1(sc, value) \
_rln_register_write_1(sc, RLN_REG_DATA, (value))
#define rln_data_read_1(sc) \
_rln_register_read_1(sc, RLN_REG_DATA)
#define rln_data_write_multi_1(sc, buf, len) \
bus_space_write_multi_1((sc)->sc_iot, (sc)->sc_ioh, \
RLN_REG_DATA, (buf), (len))
#define rln_data_read_multi_1(sc, buf, len) \
bus_space_read_multi_1((sc)->sc_iot, (sc)->sc_ioh, \
RLN_REG_DATA, (buf), (len))
/* 16-bit data register access. */
#define rln_data_write_2(sc, value) \
_rln_register_write_2(sc, RLN_REG_DATA, (value))
#define rln_data_read_2(sc) \
_rln_register_read_2(sc, RLN_REG_DATA)
#define rln_data_write_multi_2(sc, buf, len) \
bus_space_write_multi_2((sc)->sc_iot, (sc)->sc_ioh, \
RLN_REG_DATA, (buf), (len))
#define rln_data_read_multi_2(sc, buf, len) \
bus_space_read_multi_2((sc)->sc_iot, (sc)->sc_ioh, \
RLN_REG_DATA, (buf), (len))
/* Status register. */
#define RLN_STATUS_CLRNAK 0x08
#define RLN_STATUS_WAKEUP 0x80
#define RLN_STATUS_TX_IDLE 0x00
#define RLN_STATUS_TX_HILEN_AVAIL 0x01
#define RLN_STATUS_TX_HILEN_ACCEPT 0x02
#define RLN_STATUS_TX_XFR_COMPLETE 0x03
#define RLN_STATUS_TX_XFR 0x04
#define RLN_STATUS_TX_ERROR 0x05
#define RLN_STATUS_TX_LOLEN_AVAIL 0x06
#define RLN_STATUS_TX_LOLEN_ACCEPT 0x07
#define RLN_STATUS_TX_MASK 0x0f
#define RLN_STATUS_RX_IDLE 0x00
#define RLN_STATUS_RX_HILEN_AVAIL 0x10
#define RLN_STATUS_RX_HILEN_ACCEPT 0x20
#define RLN_STATUS_RX_XFR_COMPLETE 0x30
#define RLN_STATUS_RX_XFR 0x40
#define RLN_STATUS_RX_ERROR 0x50
#define RLN_STATUS_RX_LOLEN_AVAIL 0x60
#define RLN_STATUS_RX_LOLEN_ACCEPT 0x70
#define RLN_STATUS_RX_MASK 0x70
#define rln_status_write(sc, value) \
_rln_register_write_1(sc, RLN_REG_STATUS, (value))
#define rln_status_set(sc, bits) \
rln_status_write(sc, (sc)->sc_status |= (bits))
#define rln_status_clear(sc, bits) \
rln_status_write(sc, (sc)->sc_status &= ~(bits))
#define _rln_status_setmask(sc, mask, bits) \
do { \
int _s; \
\
_s = splhigh(); \
(sc)->sc_status = ((sc)->sc_status & (mask)) | (bits); \
rln_status_write(sc, (sc)->sc_status); \
splx(_s); \
} while (0);
#define rln_status_rx_write(sc, state) \
_rln_status_setmask((sc), ~RLN_STATUS_RX_MASK, state)
#define rln_status_tx_write(sc, state) \
_rln_status_setmask((sc), ~RLN_STATUS_TX_MASK, state)
#define rln_status_read(sc) \
_rln_register_read_1(sc, RLN_REG_STATUS)
#define rln_status_rx_read(sc) \
(rln_status_read(sc) & ~RLN_STATUS_TX_MASK)
#define rln_status_tx_read(sc) \
(rln_status_read(sc) & ~RLN_STATUS_RX_MASK)
static inline int
rln_status_rx_ready(sc)
struct rln_softc *sc;
{
u_int8_t status;
status = rln_status_rx_read(sc);
return (status == RLN_STATUS_RX_LOLEN_AVAIL ||
status == RLN_STATUS_RX_HILEN_AVAIL ||
status == RLN_STATUS_RX_ERROR);
}
#define rln_status_tx_int(sc) do { \
int _s = splhigh(); \
\
rln_control_clear(sc, RLN_CONTROL_TXINT); \
rln_control_set(sc, RLN_CONTROL_TXINT); \
splx(_s); \
} while (0)
#define rln_status_rx_int(sc) do { \
int _s = splhigh(); \
\
rln_control_clear(sc, RLN_CONTROL_RXINT); \
rln_control_set(sc, RLN_CONTROL_RXINT); \
splx(_s); \
} while (0)
/* Control register. */
#define RLN_CONTROL_RXINT 0x01
#define RLN_CONTROL_TXINT 0x02
#define RLN_CONTROL_BIT2 0x04
#define RLN_CONTROL_BIT3 0x08
#define RLN_CONTROL_RESET 0x10
#define RLN_CONTROL_16BIT 0x20
#define RLN_CONTROL_MASK 0x3f
#define rln_control_write(sc, value) \
_rln_register_write_1(sc, RLN_REG_CONTROL, \
(sc)->sc_control = (value))
#define rln_control_read(sc) \
_rln_register_read_1(sc, RLN_REG_CONTROL)
#define rln_control_set(sc, bits) \
rln_control_write(sc, (sc)->sc_control | (bits))
#define rln_control_clear(sc, bits) \
rln_control_write(sc, (sc)->sc_control & ~(bits))
#define rln_control_outofstandby(sc) do { \
rln_control_write(sc, (sc)->sc_control | RLN_CONTROL_RESET);\
DELAY(30000); \
rln_control_write(sc, (sc)->sc_control); \
} while (0)
/* Interrupt selection register. */
#define RLN_INTSEL_IRQMASK 0x07
#define RLN_INTSEL_ENABLE 0x10
#define RLN_INTSEL_BIT7 0x80
#define rln_intsel_disable(sc) do { \
int _s; \
\
_s = splhigh(); \
_rln_register_write_1(sc, RLN_REG_INTSEL, \
(sc)->sc_intsel &= ~RLN_INTSEL_ENABLE); \
splx(_s); \
} while (0)
#define rln_intsel_enable(sc) do { \
int _s; \
\
_s = splhigh(); \
_rln_register_write_1(sc, RLN_REG_INTSEL, \
(sc)->sc_intsel |= RLN_INTSEL_ENABLE); \
splx(_s); \
} while (0)
#define rln_intsel_write(sc, value) \
_rln_register_write_1(sc, RLN_REG_INTSEL, \
(sc)->sc_intsel |= (value))
/* End of interrupt signal, used on some newer cards. */
#define rln_eoi(sc) \
(void) _rln_register_read_1(sc, RLN_REG_EOI)
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