NetBSD-5.0.2/sys/dev/i2c/spdmem.c
/* $NetBSD: spdmem.c,v 1.11 2008/09/28 12:59:54 pgoyette Exp $ */
/*
* Copyright (c) 2007 Nicolas Joly
* Copyright (c) 2007 Paul Goyette
* Copyright (c) 2007 Tobias Nygren
* 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, 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Serial Presence Detect (SPD) memory identification
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: spdmem.c,v 1.11 2008/09/28 12:59:54 pgoyette Exp $");
#include <sys/param.h>
#include <sys/device.h>
#include <sys/endian.h>
#include <sys/sysctl.h>
#include <machine/bswap.h>
#include <dev/i2c/i2cvar.h>
#include <dev/i2c/spdmemreg.h>
#include <dev/i2c/spdmemvar.h>
static int spdmem_match(device_t, cfdata_t, void *);
static void spdmem_attach(device_t, device_t, void *);
SYSCTL_SETUP_PROTO(sysctl_spdmem_setup);
static uint8_t spdmem_read(struct spdmem_softc *, uint8_t);
CFATTACH_DECL_NEW(spdmem, sizeof(struct spdmem_softc),
spdmem_match, spdmem_attach, NULL, NULL);
#define IS_RAMBUS_TYPE (s->sm_len < 4)
static const char* spdmem_basic_types[] = {
"unknown",
"FPM",
"EDO",
"Pipelined Nibble",
"SDRAM",
"ROM",
"DDR SGRAM",
"DDR SDRAM",
"DDR2 SDRAM",
"DDR2 SDRAM FB",
"DDR2 SDRAM FB Probe",
"DDR3 SDRAM"
};
static const char* spdmem_superset_types[] = {
"unknown",
"ESDRAM",
"DDR ESDRAM",
"PEM EDO",
"PEM SDRAM"
};
static const char* spdmem_voltage_types[] = {
"TTL (5V tolerant)",
"LvTTL (not 5V tolerant)",
"HSTL 1.5V",
"SSTL 3.3V",
"SSTL 2.5V",
"SSTL 1.8V"
};
static const char* spdmem_refresh_types[] = {
"15.625us",
"3.9us",
"7.8us",
"31.3us",
"62.5us",
"125us"
};
static const char* spdmem_parity_types[] = {
"no parity or ECC",
"data parity",
"data ECC",
"data parity and ECC",
"cmd/addr parity",
"cmd/addr/data parity",
"cmd/addr parity, data ECC",
"cmd/addr/data parity, data ECC"
};
/* Cycle time fractional values (units of .001 ns) for DDR2 SDRAM */
static const uint16_t spdmem_cycle_frac[] = {
0, 100, 200, 300, 400, 500, 600, 700, 800, 900,
250, 333, 667, 750, 999, 999
};
/* Format string for timing info */
static const char* latency="tAA-tRCD-tRP-tRAS: %d-%d-%d-%d\n";
/* sysctl stuff */
static int hw_node = CTL_EOL;
/* CRC functions used for certain memory types */
static uint16_t spdcrc16 (struct spdmem_softc *sc, int count)
{
uint16_t crc;
int i, j;
uint8_t val;
crc = 0;
for (j = 0; j <= count; j++) {
val = spdmem_read(sc, j);
crc = crc ^ val << 8;
for (i = 0; i < 8; ++i)
if (crc & 0x8000)
crc = crc << 1 ^ 0x1021;
else
crc = crc << 1;
}
return (crc & 0xFFFF);
}
static int
spdmem_match(device_t parent, cfdata_t match, void *aux)
{
struct i2c_attach_args *ia = aux;
struct spdmem_softc sc;
int cksum = 0;
uint8_t i, val, spd_type;
int spd_len, spd_crc_cover;
uint16_t crc_calc, crc_spd;
if ((ia->ia_addr & SPDMEM_ADDRMASK) != SPDMEM_ADDR)
return 0;
sc.sc_tag = ia->ia_tag;
sc.sc_addr = ia->ia_addr;
spd_type = spdmem_read(&sc, 2);
/* For older memory types, validate the checksum over 1st 63 bytes */
if (spd_type <= SPDMEM_MEMTYPE_DDR2SDRAM) {
for (i = 0; i < 63; i++)
cksum += spdmem_read(&sc, i);
val = spdmem_read(&sc, 63);
if (cksum == 0 || (cksum & 0xff) != val) {
aprint_debug("spd addr 0x%2x: ", sc.sc_addr);
aprint_debug("spd checksum failed, calc = 0x%02x, "
"spd = 0x%02x\n", cksum, val);
return 0;
} else
return 1;
}
/* For DDR3 and FBDIMM, verify the CRC */
else if (spd_type <= SPDMEM_MEMTYPE_DDR3SDRAM) {
spd_len = spdmem_read(&sc, 0);
if (spd_len && SPDMEM_SPDCRC_116)
spd_crc_cover = 116;
else
spd_crc_cover = 125;
switch (spd_len & SPDMEM_SPDLEN_MASK) {
case SPDMEM_SPDLEN_128:
spd_len = 128;
break;
case SPDMEM_SPDLEN_176:
spd_len = 176;
break;
case SPDMEM_SPDLEN_256:
spd_len = 256;
break;
default:
return 0;
}
if (spd_crc_cover > spd_len)
return 0;
crc_calc = spdcrc16(&sc, spd_crc_cover);
crc_spd = spdmem_read(&sc, 127) << 8;
crc_spd |= spdmem_read(&sc, 126);
if (crc_calc != crc_spd) {
aprint_debug("spd addr 0x%2x: ", sc.sc_addr);
aprint_debug("crc16 failed, covers %d bytes, "
"calc = 0x%04x, spd = 0x%04x\n",
spd_crc_cover, crc_calc, crc_spd);
return 0;
}
return 1;
}
/* For unrecognized memory types, don't match at all */
return 0;
}
static void
spdmem_attach(device_t parent, device_t self, void *aux)
{
struct spdmem_softc *sc = device_private(self);
struct i2c_attach_args *ia = aux;
struct spdmem *s = &(sc->sc_spd_data);
const char *type;
const char *voltage;
const char *refresh;
const char *ddr_type_string = NULL;
const char *rambus_rev = "Reserved";
int num_banks = 0;
int per_chip = 0;
int dimm_size, cycle_time, d_clk, p_clk, bits;
int i;
unsigned int spd_len, spd_size;
unsigned int tAA, tRCD, tRP, tRAS;
const struct sysctlnode *node = NULL;
sc->sc_tag = ia->ia_tag;
sc->sc_addr = ia->ia_addr;
if (!pmf_device_register(self, NULL, NULL))
aprint_error_dev(self, "couldn't establish power handler\n");
/*
* FBDIMM and DDR3 (and probably all newer) have a different
* encoding of the SPD EEPROM used/total sizes
*/
s->sm_len = spdmem_read(sc, 0);
s->sm_size = spdmem_read(sc, 1);
s->sm_type = spdmem_read(sc, 2);
if (s->sm_type >= SPDMEM_MEMTYPE_FBDIMM) {
spd_size = 64 << (s->sm_len & SPDMEM_SPDSIZE_MASK);
switch (s->sm_len & SPDMEM_SPDLEN_MASK) {
case SPDMEM_SPDLEN_128:
spd_len = 128;
break;
case SPDMEM_SPDLEN_176:
spd_len = 176;
break;
case SPDMEM_SPDLEN_256:
spd_len = 256;
break;
default:
spd_len = 64;
break;
}
} else {
spd_size = 1 << s->sm_size;
spd_len = s->sm_len;
if (spd_len < 64)
spd_len = 64;
}
if (spd_len > spd_size)
spd_len = spd_size;
if (spd_len > sizeof(struct spdmem))
spd_len = sizeof(struct spdmem);
for (i = 3; i < spd_len; i++)
((uint8_t *)s)[i] = spdmem_read(sc, i);
#ifdef DEBUG
for (i = 0; i < spd_len; i += 16) {
int j, k;
aprint_debug("\n");
aprint_debug_dev(self, "0x%02x:", i);
k = (spd_len > i + 16) ? spd_len : i + 16;
for (j = i; j < k; j++)
aprint_debug(" %02x", ((uint8_t *)s)[j]);
}
aprint_debug("\n");
aprint_debug_dev(self, "");
#endif
/*
* Setup our sysctl subtree, hw.spdmemN
*/
if (hw_node != CTL_EOL)
sysctl_createv(NULL, 0, NULL, &node,
0, CTLTYPE_NODE,
device_xname(self), NULL, NULL, 0, NULL, 0,
CTL_HW, CTL_CREATE, CTL_EOL);
if (node != NULL && spd_len != 0)
sysctl_createv(NULL, 0, NULL, NULL,
0,
CTLTYPE_STRUCT, "spd_data",
SYSCTL_DESCR("raw spd data"), NULL,
0, s, spd_len,
CTL_HW, node->sysctl_num, CTL_CREATE, CTL_EOL);
/*
* Decode and print key SPD contents
*/
if (IS_RAMBUS_TYPE) {
if (s->sm_type == SPDMEM_MEMTYPE_RAMBUS)
type = "Rambus";
else if (s->sm_type == SPDMEM_MEMTYPE_DIRECTRAMBUS)
type = "Direct Rambus";
else
type = "Rambus (unknown)";
switch (s->sm_len) {
case 0:
rambus_rev = "Invalid";
break;
case 1:
rambus_rev = "0.7";
break;
case 2:
rambus_rev = "1.0";
break;
default:
rambus_rev = "Reserved";
break;
}
} else {
if (s->sm_type < __arraycount(spdmem_basic_types))
type = spdmem_basic_types[s->sm_type];
else
type = "unknown memory type";
if (s->sm_type == SPDMEM_MEMTYPE_EDO &&
s->sm_fpm.fpm_superset == SPDMEM_SUPERSET_EDO_PEM)
type = spdmem_superset_types[SPDMEM_SUPERSET_EDO_PEM];
if (s->sm_type == SPDMEM_MEMTYPE_SDRAM &&
s->sm_sdr.sdr_superset == SPDMEM_SUPERSET_SDRAM_PEM)
type = spdmem_superset_types[SPDMEM_SUPERSET_SDRAM_PEM];
if (s->sm_type == SPDMEM_MEMTYPE_DDRSDRAM &&
s->sm_ddr.ddr_superset == SPDMEM_SUPERSET_DDR_ESDRAM)
type =
spdmem_superset_types[SPDMEM_SUPERSET_DDR_ESDRAM];
if (s->sm_type == SPDMEM_MEMTYPE_SDRAM &&
s->sm_sdr.sdr_superset == SPDMEM_SUPERSET_ESDRAM) {
type = spdmem_superset_types[SPDMEM_SUPERSET_ESDRAM];
}
}
aprint_normal("\n");
aprint_normal_dev(self, "%s memory", type);
strlcpy(sc->sc_type, type, SPDMEM_TYPE_MAXLEN);
if (node != NULL)
sysctl_createv(NULL, 0, NULL, NULL,
0,
CTLTYPE_STRING, "mem_type",
SYSCTL_DESCR("memory module type"), NULL,
0, sc->sc_type, 0,
CTL_HW, node->sysctl_num, CTL_CREATE, CTL_EOL);
if (IS_RAMBUS_TYPE)
aprint_normal(", SPD Revision %s", rambus_rev);
else if (s->sm_config < __arraycount(spdmem_parity_types) &&
(s->sm_type == SPDMEM_MEMTYPE_SDRAM ||
s->sm_type == SPDMEM_MEMTYPE_DDRSDRAM ||
s->sm_type == SPDMEM_MEMTYPE_DDR2SDRAM))
aprint_normal(", %s", spdmem_parity_types[s->sm_config]);
else if (s->sm_type == SPDMEM_MEMTYPE_DDR3SDRAM)
aprint_normal(", %sECC", s->sm_ddr3.ddr3_hasECC?"":"no ");
/* Extract module size info */
dimm_size = 0;
if (IS_RAMBUS_TYPE) {
dimm_size = s->sm_rdr.rdr_rows + s->sm_rdr.rdr_cols - 13;
num_banks = 1;
per_chip = 1;
} else if (s->sm_type == SPDMEM_MEMTYPE_SDRAM) {
dimm_size = s->sm_sdr.sdr_rows + s->sm_sdr.sdr_cols - 17;
num_banks = s->sm_sdr.sdr_banks;
per_chip = s->sm_sdr.sdr_banks_per_chip;
} else if (s->sm_type == SPDMEM_MEMTYPE_DDRSDRAM) {
dimm_size = s->sm_ddr.ddr_rows + s->sm_ddr.ddr_cols - 17;
num_banks = s->sm_ddr.ddr_ranks;
per_chip = s->sm_ddr.ddr_banks_per_chip;
} else if (s->sm_type == SPDMEM_MEMTYPE_DDR2SDRAM) {
dimm_size = s->sm_ddr2.ddr2_rows + s->sm_ddr2.ddr2_cols - 17;
num_banks = s->sm_ddr2.ddr2_ranks + 1;
per_chip = s->sm_ddr2.ddr2_banks_per_chip;
} else if (s->sm_type == SPDMEM_MEMTYPE_DDR3SDRAM) {
/*
* DDR3 size specification is quite different from DDR2
*
* Module capacity is defined as
* Chip_Capacity_in_bits / 8bits-per-byte
* * external_bus_width
* / internal_bus_width
* We further divide by 2**20 to get our answer in MB
*/
dimm_size =
(s->sm_ddr3.ddr3_chipsize + 28 - 20) - 3 +
(s->sm_ddr3.ddr3_datawidth + 3) -
(s->sm_ddr3.ddr3_chipwidth + 2);
num_banks = s->sm_ddr3.ddr3_physbanks;
per_chip = 1;
} else if (s->sm_type == SPDMEM_MEMTYPE_FBDIMM ||
s->sm_type == SPDMEM_MEMTYPE_FBDIMM_PROBE) {
/*
* FB-DIMM is very much like DDR3
*/
dimm_size =
s->sm_fbd.fbdimm_rows + 12 +
s->sm_fbd.fbdimm_cols + 9 - 20 - 3;
num_banks = 1 << (s->sm_fbd.fbdimm_banks + 2);
per_chip = 1;
}
if (IS_RAMBUS_TYPE ||
(num_banks <= 8 && per_chip <= 8 && dimm_size > 0 &&
dimm_size <= 12)) {
dimm_size = (1 << dimm_size) * num_banks * per_chip;
aprint_normal(", %dMB", dimm_size);
if (node != NULL)
sysctl_createv(NULL, 0, NULL, NULL,
CTLFLAG_IMMEDIATE,
CTLTYPE_INT, "size",
SYSCTL_DESCR("module size in MB"), NULL,
dimm_size, NULL, 0,
CTL_HW, node->sysctl_num, CTL_CREATE,
CTL_EOL);
}
/* Nothing further for RAMBUS memory */
if (IS_RAMBUS_TYPE) {
aprint_normal("\n");
return;
}
cycle_time = 0; /* cycle_time in units of 0.001 ns */
tAA = tRCD = tRP = tRAS = 0; /* Initialize latency values */
if (s->sm_type == SPDMEM_MEMTYPE_SDRAM) {
cycle_time = s->sm_sdr.sdr_cycle_whole * 1000 +
s->sm_sdr.sdr_cycle_tenths * 100;
tRCD = s->sm_sdr.sdr_tRCD;
tRP = s->sm_sdr.sdr_tRP;
tRAS = s->sm_sdr.sdr_tRAS;
tAA = 0;
for (i = 0; i < 8; i++)
if (s->sm_sdr.sdr_tCAS & (1 << i))
tAA = i;
tAA++;
}
else if (s->sm_type == SPDMEM_MEMTYPE_DDRSDRAM ||
s->sm_type == SPDMEM_MEMTYPE_DDR2SDRAM) {
cycle_time = s->sm_ddr2.ddr2_cycle_whole * 1000 +
spdmem_cycle_frac[s->sm_ddr2.ddr2_cycle_frac];
tRCD = ( 250 * s->sm_ddr2.ddr2_tRCD + cycle_time - 1) /
cycle_time;
tRP = ( 250 * s->sm_ddr2.ddr2_tRP + cycle_time - 1) /
cycle_time;
tRAS = (1000 * s->sm_ddr2.ddr2_tRAS + cycle_time - 1) /
cycle_time;
tAA = 0;
for (i = 2; i < 8; i++)
if (s->sm_ddr2.ddr2_tCAS & (1 << i))
tAA = i;
/* DDR_SDRAM measures tAA in half-cycles */
if (s->sm_type == SPDMEM_MEMTYPE_DDRSDRAM)
tAA /= 2;
}
else if (s->sm_type == SPDMEM_MEMTYPE_DDR3SDRAM) {
cycle_time = (1000 * s->sm_ddr3.ddr3_mtb_dividend +
(s->sm_ddr3.ddr3_mtb_divisor / 2)) /
s->sm_ddr3.ddr3_mtb_divisor;
cycle_time *= s->sm_ddr3.ddr3_tCKmin;
tAA = s->sm_ddr3.ddr3_tAAmin / s->sm_ddr3.ddr3_tCKmin;
tRCD = s->sm_ddr3.ddr3_tRCDmin / s->sm_ddr3.ddr3_tCKmin;
tRP = s->sm_ddr3.ddr3_tRPmin / s->sm_ddr3.ddr3_tCKmin;
tRAS = (s->sm_ddr3.ddr3_tRAS_msb * 256 +
s->sm_ddr3.ddr3_tRAS_lsb) / s->sm_ddr3.ddr3_tCKmin;
}
else if (s->sm_type == SPDMEM_MEMTYPE_FBDIMM ||
s->sm_type == SPDMEM_MEMTYPE_FBDIMM_PROBE) {
cycle_time = (1000 * s->sm_fbd.fbdimm_mtb_dividend +
(s->sm_fbd.fbdimm_mtb_divisor / 2)) /
s->sm_fbd.fbdimm_mtb_divisor;
tAA = s->sm_fbd.fbdimm_tAAmin / s->sm_fbd.fbdimm_tCKmin;
tRCD = s->sm_fbd.fbdimm_tRCDmin / s->sm_fbd.fbdimm_tCKmin;
tRP = s->sm_fbd.fbdimm_tRPmin / s->sm_fbd.fbdimm_tCKmin;
tRAS = (s->sm_fbd.fbdimm_tRAS_msb * 256 +
s->sm_fbd.fbdimm_tRAS_lsb) / s->sm_fbd.fbdimm_tCKmin;
}
if (cycle_time != 0) {
/*
* cycle time is scaled by a factor of 1000 to avoid using
* floating point. Calculate memory speed as the number
* of cycles per microsecond.
*/
d_clk = 1000 * 1000;
if (s->sm_type == SPDMEM_MEMTYPE_FBDIMM ||
s->sm_type == SPDMEM_MEMTYPE_FBDIMM_PROBE) {
/* DDR2 FB-DIMM uses a dual-pumped clock */
d_clk *= 2;
bits = 1 << (s->sm_fbd.fbdimm_dev_width + 2);
ddr_type_string = "PC2";
} else if (s->sm_type == SPDMEM_MEMTYPE_DDR3SDRAM) {
/* DDR3 uses a dual-pumped clock */
d_clk *= 2;
bits = 1 << (s->sm_ddr3.ddr3_datawidth + 3);
ddr_type_string = "PC3";
} else if (s->sm_type == SPDMEM_MEMTYPE_DDR2SDRAM) {
/* DDR2 uses a dual-pumped clock */
d_clk *= 2;
bits = s->sm_ddr2.ddr2_datawidth;
if ((s->sm_config & 0x03) != 0)
bits -= 8;
ddr_type_string = "PC2";
} else if (s->sm_type == SPDMEM_MEMTYPE_DDRSDRAM) {
/* DDR uses a dual-pumped clock */
d_clk *= 2;
bits = le16toh(s->sm_ddr.ddr_datawidth);
if (s->sm_config == 1 || s->sm_config == 2)
bits -= 8;
ddr_type_string = "PC";
} else { /* SPDMEM_MEMTYPE_SDRAM */
bits = le16toh(s->sm_sdr.sdr_datawidth);
if (s->sm_config == 1 || s->sm_config == 2)
bits -= 8;
ddr_type_string = "PC";
}
/*
* Calculate p_clk first, since for DDR3 we need maximum
* significance. DDR3 rating is not rounded to a multiple
* of 100. This results in cycle_time of 1.5ns displayed
* as PC3-10666.
*/
p_clk = (d_clk * bits) / 8 / cycle_time;
d_clk = ((d_clk + cycle_time / 2) ) / cycle_time;
if ( s->sm_type != SPDMEM_MEMTYPE_DDR3SDRAM) {
if ((p_clk % 100) >= 50)
p_clk += 50;
p_clk -= p_clk % 100;
}
aprint_normal(", %dMHz (%s-%d)\n",
d_clk, ddr_type_string, p_clk);
if (node != NULL)
sysctl_createv(NULL, 0, NULL, NULL,
CTLFLAG_IMMEDIATE,
CTLTYPE_INT, "speed",
SYSCTL_DESCR("memory speed in MHz"),
NULL, d_clk, NULL, 0,
CTL_HW, node->sysctl_num, CTL_CREATE,
CTL_EOL);
}
aprint_verbose_dev(self, "");
switch (s->sm_type) {
case SPDMEM_MEMTYPE_EDO:
case SPDMEM_MEMTYPE_FPM:
aprint_verbose(
"%d rows, %d cols, %d banks, %dns tRAC, %dns tCAC\n",
s->sm_fpm.fpm_rows, s->sm_fpm.fpm_cols,
s->sm_fpm.fpm_banks, s->sm_fpm.fpm_tRAC,
s->sm_fpm.fpm_tCAC);
break;
case SPDMEM_MEMTYPE_ROM:
aprint_verbose("%d rows, %d cols, %d banks\n",
s->sm_rom.rom_rows, s->sm_rom.rom_cols,
s->sm_rom.rom_banks);
break;
case SPDMEM_MEMTYPE_SDRAM:
aprint_verbose(
"%d rows, %d cols, %d banks, %d banks/chip, "
"%d.%dns cycle time\n",
s->sm_sdr.sdr_rows, s->sm_sdr.sdr_cols, s->sm_sdr.sdr_banks,
s->sm_sdr.sdr_banks_per_chip, cycle_time/1000,
(cycle_time % 1000) / 100);
aprint_verbose_dev(self, latency, tAA, tRCD, tRP, tRAS);
break;
case SPDMEM_MEMTYPE_DDRSDRAM:
aprint_verbose(
"%d rows, %d cols, %d ranks, %d banks/chip, "
"%d.%dns cycle time\n",
s->sm_ddr.ddr_rows, s->sm_ddr.ddr_cols, s->sm_ddr.ddr_ranks,
s->sm_ddr.ddr_banks_per_chip, cycle_time/1000,
(cycle_time % 1000 + 50) / 100);
aprint_verbose_dev(self, latency, tAA, tRCD, tRP, tRAS);
break;
case SPDMEM_MEMTYPE_DDR2SDRAM:
aprint_verbose(
"%d rows, %d cols, %d ranks, %d banks/chip, "
"%d.%02dns cycle time\n",
s->sm_ddr2.ddr2_rows, s->sm_ddr2.ddr2_cols,
s->sm_ddr2.ddr2_ranks + 1, s->sm_ddr2.ddr2_banks_per_chip,
cycle_time / 1000, (cycle_time % 1000 + 5) /10 );
aprint_verbose_dev(self, latency, tAA, tRCD, tRP, tRAS);
break;
case SPDMEM_MEMTYPE_DDR3SDRAM:
aprint_verbose(
"%d rows, %d cols, %d internal banks, %d physical banks, "
"%d.%03dns cycle time\n",
s->sm_ddr3.ddr3_rows + 9, s->sm_ddr3.ddr3_cols + 12,
8 << s->sm_ddr3.ddr3_logbanks, s->sm_ddr3.ddr3_physbanks,
cycle_time/1000, cycle_time % 1000);
aprint_verbose_dev(self, latency, tAA, tRCD, tRP, tRAS);
break;
default:
break;
}
if (s->sm_type < SPDMEM_MEMTYPE_DDR3SDRAM) {
if (s->sm_voltage < __arraycount(spdmem_voltage_types))
voltage = spdmem_voltage_types[s->sm_voltage];
else
voltage = "unknown";
if (s->sm_refresh < __arraycount(spdmem_refresh_types))
refresh = spdmem_refresh_types[s->sm_refresh];
else
refresh = "unknown";
aprint_verbose_dev(self, "voltage %s, refresh time %s",
voltage, refresh);
if (s->sm_selfrefresh)
aprint_verbose(" (self-refreshing)");
aprint_verbose("\n");
}
}
static uint8_t
spdmem_read(struct spdmem_softc *sc, uint8_t reg)
{
uint8_t val;
iic_acquire_bus(sc->sc_tag,0);
iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr, ®, 1,
&val, 1, 0);
iic_release_bus(sc->sc_tag, 0);
return val;
}
SYSCTL_SETUP(sysctl_spdmem_setup, "sysctl hw.spdmem subtree setup")
{
const struct sysctlnode *node;
if (sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT,
CTLTYPE_NODE, "hw", NULL,
NULL, 0, NULL, 0,
CTL_HW, CTL_EOL) != 0)
return;
hw_node = node->sysctl_num;
}