diff options
author | Todd C. Miller <millert@cvs.openbsd.org> | 2002-06-28 00:40:54 +0000 |
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committer | Todd C. Miller <millert@cvs.openbsd.org> | 2002-06-28 00:40:54 +0000 |
commit | 6d3f0e82d41522c4925339147c5288bcb4f9595f (patch) | |
tree | a1a8641dfaf9c1aa5d4a008f35bd94a60797dd19 /sys/dev/ic/smc93cx6.c | |
parent | 54295fed3b9af2129e74cedba534c4f30c3c30df (diff) |
not used by new ahc driver
Diffstat (limited to 'sys/dev/ic/smc93cx6.c')
-rw-r--r-- | sys/dev/ic/smc93cx6.c | 206 |
1 files changed, 0 insertions, 206 deletions
diff --git a/sys/dev/ic/smc93cx6.c b/sys/dev/ic/smc93cx6.c deleted file mode 100644 index 870d58c7656..00000000000 --- a/sys/dev/ic/smc93cx6.c +++ /dev/null @@ -1,206 +0,0 @@ -/* $OpenBSD: smc93cx6.c,v 1.10 2002/06/28 00:34:54 smurph Exp $ */ -/* $FreeBSD: sys/dev/aic7xxx/93cx6.c,v 1.5 2000/01/07 23:08:17 gibbs Exp $ */ -/* - * Interface for the 93C66/56/46/26/06 serial eeprom parts. - * - * Copyright (c) 1995, 1996 Daniel M. Eischen - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice immediately at the beginning of the file, without modification, - * this list of conditions, and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Absolutely no warranty of function or purpose is made by the author - * Daniel M. Eischen. - * 4. Modifications may be freely made to this file if the above conditions - * are met. - */ - -/* - * The instruction set of the 93C66/56/46/26/06 chips are as follows: - * - * Start OP * - * Function Bit Code Address** Data Description - * ------------------------------------------------------------------- - * READ 1 10 A5 - A0 Reads data stored in memory, - * starting at specified address - * EWEN 1 00 11XXXX Write enable must precede - * all programming modes - * ERASE 1 11 A5 - A0 Erase register A5A4A3A2A1A0 - * WRITE 1 01 A5 - A0 D15 - D0 Writes register - * ERAL 1 00 10XXXX Erase all registers - * WRAL 1 00 01XXXX D15 - D0 Writes to all registers - * EWDS 1 00 00XXXX Disables all programming - * instructions - * *Note: A value of X for address is a don't care condition. - * **Note: There are 8 address bits for the 93C56/66 chips unlike - * the 93C46/26/06 chips which have 6 address bits. - * - * The 93C46 has a four wire interface: clock, chip select, data in, and - * data out. In order to perform one of the above functions, you need - * to enable the chip select for a clock period (typically a minimum of - * 1 usec, with the clock high and low a minimum of 750 and 250 nsec - * respectively). While the chip select remains high, you can clock in - * the instructions (above) starting with the start bit, followed by the - * OP code, Address, and Data (if needed). For the READ instruction, the - * requested 16-bit register contents is read from the data out line but - * is preceded by an initial zero (leading 0, followed by 16-bits, MSB - * first). The clock cycling from low to high initiates the next data - * bit to be sent from the chip. - * - */ - -#include <sys/param.h> -#include <sys/systm.h> -#if !(defined(__NetBSD__) || defined(__OpenBSD__)) -#include <machine/bus_memio.h> -#include <machine/bus_pio.h> -#endif -#include <machine/bus.h> -#if defined(__OpenBSD__) -#include <dev/ic/aic7xxx_openbsd.h> -#endif -#include <dev/ic/aic7xxx_inline.h> -#if !(defined(__NetBSD__) || defined(__OpenBSD__)) -#include <dev/aic7xxx/93cx6.h> -#else -#include <dev/ic/smc93cx6var.h> -#endif - -/* - * Right now, we only have to read the SEEPROM. But we make it easier to - * add other 93Cx6 functions. - */ -static struct seeprom_cmd { - unsigned char len; - unsigned char bits[3]; -} seeprom_read = {3, {1, 1, 0}}; - -/* - * Wait for the SEERDY to go high; about 800 ns. - */ -#define CLOCK_PULSE(sd, rdy) \ - while ((SEEPROM_STATUS_INB(sd) & rdy) == 0) { \ - ; /* Do nothing */ \ - } \ - (void)SEEPROM_INB(sd); /* Clear clock */ - -/* - * Read the serial EEPROM and returns 1 if successful and 0 if - * not successful. - */ -int -read_seeprom(sd, buf, start_addr, count) - struct seeprom_descriptor *sd; - u_int16_t *buf; - bus_size_t start_addr; - bus_size_t count; -{ - int i = 0; - u_int k = 0; - u_int16_t v; - u_int8_t temp; - - /* - * Read the requested registers of the seeprom. The loop - * will range from 0 to count-1. - */ - for (k = start_addr; k < count + start_addr; k++) { - /* Send chip select for one clock cycle. */ - temp = sd->sd_MS ^ sd->sd_CS; - SEEPROM_OUTB(sd, temp ^ sd->sd_CK); - CLOCK_PULSE(sd, sd->sd_RDY); - - /* - * Now we're ready to send the read command followed by the - * address of the 16-bit register we want to read. - */ - for (i = 0; i < seeprom_read.len; i++) { - if (seeprom_read.bits[i] != 0) - temp ^= sd->sd_DO; - SEEPROM_OUTB(sd, temp); - CLOCK_PULSE(sd, sd->sd_RDY); - SEEPROM_OUTB(sd, temp ^ sd->sd_CK); - CLOCK_PULSE(sd, sd->sd_RDY); - if (seeprom_read.bits[i] != 0) - temp ^= sd->sd_DO; - } - /* Send the 6 or 8 bit address (MSB first, LSB last). */ - for (i = (sd->sd_chip - 1); i >= 0; i--) { - if ((k & (1 << i)) != 0) - temp ^= sd->sd_DO; - SEEPROM_OUTB(sd, temp); - CLOCK_PULSE(sd, sd->sd_RDY); - SEEPROM_OUTB(sd, temp ^ sd->sd_CK); - CLOCK_PULSE(sd, sd->sd_RDY); - if ((k & (1 << i)) != 0) - temp ^= sd->sd_DO; - } - - /* - * Now read the 16 bit register. An initial 0 precedes the - * register contents which begins with bit 15 (MSB) and ends - * with bit 0 (LSB). The initial 0 will be shifted off the - * top of our word as we let the loop run from 0 to 16. - */ - v = 0; - for (i = 16; i >= 0; i--) { - SEEPROM_OUTB(sd, temp); - CLOCK_PULSE(sd, sd->sd_RDY); - v <<= 1; - if (SEEPROM_DATA_INB(sd) & sd->sd_DI) - v |= 1; - SEEPROM_OUTB(sd, temp ^ sd->sd_CK); - CLOCK_PULSE(sd, sd->sd_RDY); - } - - buf[k - start_addr] = v; - - /* Reset the chip select for the next command cycle. */ - temp = sd->sd_MS; - SEEPROM_OUTB(sd, temp); - CLOCK_PULSE(sd, sd->sd_RDY); - SEEPROM_OUTB(sd, temp ^ sd->sd_CK); - CLOCK_PULSE(sd, sd->sd_RDY); - SEEPROM_OUTB(sd, temp); - CLOCK_PULSE(sd, sd->sd_RDY); - } -#ifdef AHC_DUMP_EEPROM - printf("\nSerial EEPROM:\n\t"); - for (k = 0; k < count; k = k + 1) { - if (((k % 8) == 0) && (k != 0)) { - printf ("\n\t"); - } - printf (" 0x%x", buf[k]); - } - printf ("\n"); -#endif - return (1); -} - -int -verify_cksum(struct seeprom_config *sc) -{ - int i; - int maxaddr; - u_int32_t checksum; - u_int16_t *scarray; - - maxaddr = (sizeof(*sc)/2) - 1; - checksum = 0; - scarray = (uint16_t *)sc; - - for (i = 0; i < maxaddr; i++) - checksum = checksum + scarray[i]; - if (checksum == 0 - || (checksum & 0xFFFF) != sc->checksum) { - return (0); - } else { - return(1); - } -} |