| /* |
| * Copyright 2012, Google Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * 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. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT |
| * OWNER 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. |
| * |
| * superio.c: This is intended for generic SuperIO configuration functions. |
| * Functions for a specific SuperIO or Embedded Controller (EC) chips should |
| * go in a different driver. |
| */ |
| |
| #include <inttypes.h> |
| #include <sys/time.h> |
| |
| #include "drivers/superio.h" |
| |
| #include "intf/io.h" |
| |
| #include "lib/math.h" |
| |
| #include "mosys/alloc.h" |
| #include "mosys/log.h" |
| #include "mosys/platform.h" |
| |
| static struct sio_id superio_ids[] = { |
| { "ite", "it8500", 2, { 0x85, 0x00 } }, |
| { "ite", "it8518", 2, { 0x85, 0x18 } }, |
| { "ite", "it8772", 2, { 0x87, 0x72 } }, |
| { "nuvoton", "npce781", 1, { 0xfc, 0x00 } }, |
| { "smsc", "mec1308", 2, { 0x2d, 0x00 } }, |
| { "smsc", "mec1308", 2, { 0x4d, 0x01 } }, |
| { "smsc", "mec1310", 2, { 0x04, 0x02 } }, |
| }; |
| |
| static int i8042_ibf_clear(uint8_t status) |
| { |
| return !(status & I8042_IBF); |
| } |
| |
| static int i8042_obf_set(uint8_t status) |
| { |
| return status & I8042_OBF; |
| } |
| |
| static int i8042_poll_csr(struct platform_intf *intf, |
| struct i8042_host_intf *i8042_io, |
| unsigned int timeout_ms, |
| int (*cmp)(uint8_t status)) |
| { |
| uint8_t status; |
| uint16_t csr; |
| struct timeval begin, now; |
| unsigned int timeout_s = timeout_ms / 1000; |
| unsigned long int remainder_us = (timeout_ms % 1000) * 1000; |
| |
| if (i8042_io) |
| csr = i8042_io->csr; |
| else |
| csr = I8042_CSR; |
| |
| gettimeofday(&begin, NULL); |
| while (1) { |
| if (io_read8(intf, csr, &status) < 0) |
| return -1; |
| |
| if (cmp(status)) |
| return 1; |
| |
| gettimeofday(&now, NULL); |
| if (now.tv_sec - begin.tv_sec >= timeout_s) { |
| if (__abs(now.tv_usec - begin.tv_usec) >= remainder_us) |
| break; |
| } |
| } |
| |
| return 0; |
| } |
| |
| int i8042_wait_ibf_clear(struct platform_intf *intf, |
| struct i8042_host_intf *i8042_io, unsigned int timeout_ms) |
| { |
| return i8042_poll_csr(intf, i8042_io, timeout_ms, i8042_ibf_clear); |
| } |
| |
| int i8042_wait_obf_set(struct platform_intf *intf, |
| struct i8042_host_intf *i8042_io, unsigned int timeout_ms) |
| { |
| return i8042_poll_csr(intf, i8042_io, timeout_ms, i8042_obf_set); |
| } |
| |
| uint8_t sio_read(struct platform_intf *intf, uint16_t port, uint8_t reg) |
| { |
| uint8_t val = 0; |
| |
| io_write8(intf, port, reg); |
| io_read8(intf, port+1, &val); |
| |
| return val; |
| } |
| |
| void sio_write(struct platform_intf *intf, uint16_t port, |
| uint8_t reg, uint8_t data) |
| { |
| io_write8(intf, port, reg); |
| io_write8(intf, port+1, data); |
| } |
| |
| const struct sio_id *get_sio_id(struct platform_intf *intf, uint16_t port) |
| { |
| static struct sio_id *id = NULL; |
| uint8_t id_byte[2]; |
| static unsigned short done = 0; |
| int i; |
| unsigned short found = 0; |
| |
| if (done) |
| return id; |
| lprintf(LOG_DEBUG, "%s: using port 0x%04x\n", __func__, port); |
| id_byte[0] = sio_read(intf, port, SIO_CHIPID1); |
| id_byte[1] = sio_read(intf, port, SIO_CHIPID2); |
| |
| for (i = 0; i < ARRAY_SIZE(superio_ids); i++) { |
| lprintf(LOG_DEBUG, "%s: comparing 0x%02x%02x and 0x%02x%02x\n", |
| __func__, |
| superio_ids[i].chipid[0], |
| superio_ids[i].chipid[1], |
| id_byte[0], id_byte[1]); |
| if (superio_ids[i].num_id_bytes == 1) { |
| if (superio_ids[i].chipid[0] == id_byte[0]) { |
| found = 1; |
| break; |
| } |
| } else if (superio_ids[i].num_id_bytes == 2) { |
| if (superio_ids[i].chipid[0] == id_byte[0] && |
| superio_ids[i].chipid[1] == id_byte[1]) { |
| found = 1; |
| break; |
| } |
| } |
| } |
| |
| if (found) { |
| id = &superio_ids[i]; |
| id->chipver = sio_read(intf, port, SIO_CHIPVER); |
| } |
| |
| done = 1; |
| return id; |
| } |