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main: print pci vendor/device id

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This commit is contained in:
Zack Buhman 2025-09-16 16:14:44 -05:00
parent 68fb5ba5fb
commit b903bc3967
7 changed files with 69 additions and 21 deletions
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1
.gitignore vendored
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@ -12,3 +12,4 @@ __pycache__
*.cmd
*.order
*.mod.c
*.out

20
dac.h Normal file
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@ -0,0 +1,20 @@
#define DAC__RS__PIXEL_ADDRESS_WRITE 0b000
#define DAC__RS__PIXEL_ADDRESS_READ 0b011
#define DAC__RS__COLOR_VALUE 0b001
#define DAC__RS__PIXEL_MASK 0b010
#define DAC__RS__PLL_ADDRESS_WRITE 0b100
#define DAC__RS__PLL_PARAMETER 0b101
#define DAC__RS__COMMAND 0b110
#define DAC__RS__PLL_ADDRESS_READ 0b111
#define DAC__PLL_PARAMETER__CLK0_f0_PLL 0x00
#define DAC__PLL_PARAMETER__CLK0_f1_PLL 0x01
#define DAC__PLL_PARAMETER__CLK0_f2_PLL 0x02
#define DAC__PLL_PARAMETER__CLK0_f3_PLL 0x03
#define DAC__PLL_PARAMETER__CLK0_f4_PLL 0x04
#define DAC__PLL_PARAMETER__CLK0_f5_PLL 0x05
#define DAC__PLL_PARAMETER__CLK0_f6_PLL 0x06
#define DAC__PLL_PARAMETER__CLK0_f7_PLL 0x07
#define DAC__PLL_PARAMETER__CLK1_fA_PLL 0x0a
#define DAC__PLL_PARAMETER__CLK1_fB_PLL 0x0b
#define DAC__PLL_PARAMETER__PLL_CONTROL 0x0e

2
gen/voodoo2.py
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@ -205,6 +205,8 @@ def render_all(rls):
yield ""
yield from render_register_struct(rls, max_length)
yield from render_static_assert(rls, max_length)
yield ""
yield "typedef struct voodoo2_reg voodoo2_reg;"
with open(sys.argv[1], 'r') as f:
buf = f.read()

2
gen/voodoo2_config.py
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@ -83,6 +83,8 @@ def render_all(buf):
yield '#include "reg.h"'
yield ""
yield from render_struct(buf)
yield ""
yield "typedef struct voodoo2_config voodoo2_config;"
with open(sys.argv[1], 'r') as f:
buf = f.read()

52
main.c
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@ -8,6 +8,9 @@
#include <fcntl.h>
#include "voodoo2.h"
#include "voodoo2_bits.h"
#include "voodoo2_config.h"
#include "dac.h"
struct name_int {
const char * name;
@ -81,10 +84,10 @@ static inline void dac_write_pll_8(voodoo2_reg * voodoo2,
int address,
int parameter_m)
{
dac_data_write(voodoo2, address, DAC__RS__PLL_ADDRESS_WRITE, 0);
dac_data_write(voodoo2, address, DAC__RS__PLL_ADDRESS_WRITE);
wait_graphics_busy(voodoo2);
dac_data_write(voodoo2, parameter_m, DAC__RS__PLL_PARAMETER, 0);
dac_data_write(voodoo2, parameter_m, DAC__RS__PLL_PARAMETER);
wait_graphics_busy(voodoo2);
}
@ -93,13 +96,13 @@ static inline void dac_write_pll_16(voodoo2_reg * voodoo2,
int parameter_m,
int parameter_n)
{
dac_data_write(voodoo2, address, DAC__RS__PLL_ADDRESS_WRITE, 0);
dac_data_write(voodoo2, address, DAC__RS__PLL_ADDRESS_WRITE);
wait_graphics_busy(voodoo2);
dac_data_write(voodoo2, parameter_m, DAC__RS__PLL_PARAMETER, 0);
dac_data_write(voodoo2, parameter_m, DAC__RS__PLL_PARAMETER);
wait_graphics_busy(voodoo2);
dac_data_write(voodoo2, parameter_n, DAC__RS__PLL_PARAMETER, 0);
dac_data_write(voodoo2, parameter_n, DAC__RS__PLL_PARAMETER);
wait_graphics_busy(voodoo2);
}
@ -108,29 +111,44 @@ typedef struct mn {
uint8_t n;
} mn_t;
static inline struct mn_t dac_read_16(voodoo2_reg * voodoo,
static inline mn_t dac_read_pll_16(voodoo2_reg * voodoo2,
int address)
{
dac_data_write(base, address, DAC__RS__PLL_ADDRESS_READ);
wait_graphics_busy(base);
dac_data_write(voodoo2, address, DAC__RS__PLL_ADDRESS_READ);
wait_graphics_busy(voodoo2);
dac_data_read(base, 0, DAC__RS__PLL_PARAMETER);
wait_graphics_busy(base);
dac_data_read(voodoo2, 0, DAC__RS__PLL_PARAMETER);
wait_graphics_busy(voodoo2);
int m = voodoo2->fbiInit2 & 0xff;
dac_data_read(base, 0, DAC__RS__PLL_PARAMETER);
wait_graphics_busy(base);
dac_data_read(voodoo2, 0, DAC__RS__PLL_PARAMETER);
wait_graphics_busy(voodoo2);
int n = voodoo2->fbiInit2 & 0xff;
return (struct m_n){ m, n };
return (mn_t){ m, n };
}
int main()
{
const char * config = "/sys/bus/pci/devices/0000:02:0a.0/config";
int fd = open(config, O_RDWR | O_SYNC);
const char * config_path = "/sys/bus/pci/devices/0000:02:0a.0/config";
int fd = open(config_path, O_RDWR | O_SYNC);
assert(fd >= 0);
uint32_t config_size = (sizeof (struct voodoo2_config));
void * config_base = mmap(0, config_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
assert(config_base != MAP_FAILED);
voodoo2_config * config = (voodoo2_config *)config_base;
printf("Vendor ID: %04x\n", config->Vendor_ID);
printf("Device ID: %04x\n", config->Device_ID);
munmap(config_base, config_size);
close(fd);
return 0;
/*
const char * filename = "/sys/bus/pci/devices/0000:02:0a.0/resource0";
int fd = open(filename, O_RDWR | O_SYNC);
@ -138,12 +156,12 @@ int main()
uint32_t map_size = 0x4000;
off_t target_base = 0;
void * map_base = mmap(0, map_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, target_base);
void * map_base = mmap(0, map_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
assert(map_base != MAP_FAILED);
struct voodoo2_reg * reg = (struct voodoo2_reg *)map_base;
print_registers(reg);
close(fd);
*/
}

6
voodoo2.h
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@ -3,8 +3,7 @@
#include <stddef.h>
#include <stdint.h>
#include "reg32.h"
#include "reg.h"
struct voodoo2_reg {
reg32 status; // (r ) Voodoo2 Graphics Status
@ -335,3 +334,6 @@ static_assert((offsetof (struct voodoo2_reg, trexInit0)) == 0x31c);
static_assert((offsetof (struct voodoo2_reg, trexInit1)) == 0x320);
static_assert((offsetof (struct voodoo2_reg, nccTable0[0])) == 0x324);
static_assert((offsetof (struct voodoo2_reg, nccTable1[0])) == 0x354);
typedef struct voodoo2_reg voodoo2_reg;

3
voodoo2_config.h
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@ -52,3 +52,6 @@ static_assert((offsetof (struct voodoo2_config, busSnoop1)) == 0x48);
static_assert((offsetof (struct voodoo2_config, cfgStatus)) == 0x4c);
static_assert((offsetof (struct voodoo2_config, cfgScratch)) == 0x50);
static_assert((offsetof (struct voodoo2_config, siProcess)) == 0x54);
typedef struct voodoo2_config voodoo2_config;