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/* smutool Tool for SMU
* Copyright (C) 2015 Damien Zammit <damien@zamaudio.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* See <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <inttypes.h>
#include <pci/pci.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/io.h>
#include <stdlib.h>
#include <unistd.h>
#define SIZE 0x10000
int main(int argc, char* argv[])
{
uint32_t fd_mem;
struct pci_access *pacc;
struct pci_dev *nb;
if (iopl(3)) {
perror("iopl");
fprintf(stderr, "You need to be root\n");
exit(1);
}
if ((fd_mem = open("/dev/mem", O_RDWR)) < 0) {
perror("Can not open /dev/mem");
exit(1);
}
pacc = pci_alloc();
pacc->method = PCI_ACCESS_I386_TYPE1;
pci_init(pacc);
pci_scan_bus(pacc);
nb = pci_get_dev(pacc, 0, 0, 0x0, 0);
pci_fill_info(nb, PCI_FILL_IDENT | PCI_FILL_BASES | PCI_FILL_SIZES | PCI_FILL_CLASS);
/* lm32 instructions, load at 0x1ff80, read peek at 0x1fff0
1ff80: 37 9c ff f0 addi sp,sp,-16
1ff84: 5b 9b 00 08 sw (sp+8),fp
1ff88: 5b 9d 00 04 sw (sp+4),ra
1ff8c: 34 1b 00 10 mvi fp,16
1ff90: b7 7c d8 00 add fp,fp,sp
1ff94: 78 01 ab cd mvhi r1,0xabcd
1ff98: 38 21 ef 00 ori r1,r1,0xef00
1ff9c: 5b 61 00 00 sw (fp+0),r1
1ffa0: 78 01 00 01 mvhi r1,0x1
1ffa4: 38 21 ff f0 ori r1,r1,0xfff0
1ffa8: 5b 61 ff fc sw (fp+-4),r1
1ffac: 2b 61 ff fc lw r1,(fp+-4)
1ffb0: 2b 62 00 00 lw r2,(fp+0)
1ffb4: 28 42 00 00 lw r2,(r2+0)
1ffb8: 58 22 00 00 sw (r1+0),r2
1ffbc: 2b 9b 00 08 lw fp,(sp+8)
1ffc0: 2b 9d 00 04 lw ra,(sp+4)
1ffc4: 37 9c 00 10 addi sp,sp,16
1ffc8: c3 a0 00 00 ret
*/
// Fill peek location with 1s so we can tell if anything changed
pci_write_long(nb, 0xb8, 0x1fff0);
pci_write_long(nb, 0xbc, 0x11223344);
// Enable interrupts on SMU
pci_write_long(nb, 0xb8, 0x1f380);
pci_write_long(nb, 0xbc,
pci_read_long(nb, 0xbc) & ~1);
pci_write_long(nb, 0xb8, 0x1f380);
pci_write_long(nb, 0xbc,
pci_read_long(nb, 0xbc) | 1);
uint32_t peek;
for (peek = 0; peek < SIZE; peek += 4) {
uint16_t peeklo = peek & 0xffff;
uint16_t peekhi = (peek >> 16) & 0xffff;
pci_write_long(nb, 0xb8, 0x1ff80);
pci_write_long(nb, 0xbc, (0x379cfff0));
pci_write_long(nb, 0xb8, 0x1ff84);
pci_write_long(nb, 0xbc, (0x5b9b0008));
pci_write_long(nb, 0xb8, 0x1ff88);
pci_write_long(nb, 0xbc, (0x5b9d0004));
pci_write_long(nb, 0xb8, 0x1ff8c);
pci_write_long(nb, 0xbc, (0x341b0010));
pci_write_long(nb, 0xb8, 0x1ff90);
pci_write_long(nb, 0xbc, (0xb77cd800));
pci_write_long(nb, 0xb8, 0x1ff94);
pci_write_long(nb, 0xbc, (0x78010000 | (peekhi)));
pci_write_long(nb, 0xb8, 0x1ff98);
pci_write_long(nb, 0xbc, (0x38210000 | (peeklo)));
pci_write_long(nb, 0xb8, 0x1ff9c);
pci_write_long(nb, 0xbc, (0x5b610000));
pci_write_long(nb, 0xb8, 0x1ffa0);
pci_write_long(nb, 0xbc, (0x78010001));
pci_write_long(nb, 0xb8, 0x1ffa4);
pci_write_long(nb, 0xbc, (0x3821fff0));
pci_write_long(nb, 0xb8, 0x1ffa8);
pci_write_long(nb, 0xbc, (0x5b61fffc));
pci_write_long(nb, 0xb8, 0x1ffac);
pci_write_long(nb, 0xbc, (0x2b61fffc));
pci_write_long(nb, 0xb8, 0x1ffb0);
pci_write_long(nb, 0xbc, (0x2b620000));
pci_write_long(nb, 0xb8, 0x1ffb4);
pci_write_long(nb, 0xbc, (0x28420000));
pci_write_long(nb, 0xb8, 0x1ffb8);
pci_write_long(nb, 0xbc, (0x58220000));
pci_write_long(nb, 0xb8, 0x1ffbc);
pci_write_long(nb, 0xbc, (0x2b9b0008));
pci_write_long(nb, 0xb8, 0x1ffc0);
pci_write_long(nb, 0xbc, (0x2b9d0004));
pci_write_long(nb, 0xb8, 0x1ffc4);
pci_write_long(nb, 0xbc, (0x379c0010));
pci_write_long(nb, 0xb8, 0x1ffc8);
pci_write_long(nb, 0xbc, (0xc3a00000)); // ret
// add new service request
uint32_t addr;
for (addr = 0x1dbe0; addr < 0x1dbec; addr+=4) {
pci_write_long(nb, 0xb8, addr);
pci_write_long(nb, 0xbc, 0x1ff80);
}
uint8_t ack = 0;
while ((ack & 0x3) == 0) { // 0x4
pci_write_long(nb, 0xb8, 0xe0003004);
ack = pci_read_long(nb, 0xbc);
}
pci_write_long(nb, 0xb8, 0xe0003000);
ack = pci_read_long(nb, 0xbc);
ack ^= 1;
ack |= (106 << 1);
pci_write_long(nb, 0xb8, 0xe0003000);
pci_write_long(nb, 0xbc, ack);
do {
pci_write_long(nb, 0xb8, 0xe0003004);
ack = pci_read_long(nb, 0xbc);
} while ((ack & 0x1) == 0);
do {
pci_write_long(nb, 0xb8, 0xe0003004);
ack = pci_read_long(nb, 0xbc);
} while ((ack & 0x2) == 0);
usleep(10000);
uint32_t roml;
pci_write_long(nb, 0xb8, 0x1fff0);
roml = pci_read_long(nb, 0xbc);
printf("%c%c%c%c",
(roml >> 24) & 0xff,
(roml >> 16) & 0xff,
(roml >> 8) & 0xff,
(roml & 0xff));
fflush(stdout);
} // end loop
fprintf(stderr, "exiting\n");
pci_cleanup(pacc);
return 0;
}
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