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atimach64gx: Fix CONFIG_CNTL and MM_REGS_OFFSET.

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Init them to defaults.
Make CONFIG_CNTL 8 bytes so unaligned read/write is easier.
Write changes to CONFIG_CNTL even if offset + size is > 4.
Log aperture change only if first byte (LSB) of CONFIG_CNTL is written. The driver might only write to the 2 most significant bytes which won't affect aperture size.
Offset and size are applied to the destination, not to source value, so we shouldn't use extract_bits when logging value.
Use ATI bitfield enums in switch statement.
This commit is contained in:
joevt 2024-04-20 00:53:32 -07:00 committed by dingusdev
parent e91432f939
commit 2c79171be6
2 changed files with 27 additions and 18 deletions
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22
devices/video/atimach64gx.cpp
View File

@ -26,7 +26,6 @@ along with this program. If not, see <https://www.gnu.org/licenses/>.
#include <core/bitops.h>
#include <devices/deviceregistry.h>
#include <devices/video/atimach64defs.h>
#include <devices/video/atimach64gx.h>
#include <devices/video/displayid.h>
#include <devices/video/rgb514defs.h>
@ -190,7 +189,7 @@ void AtiMach64Gx::notify_bar_change(int bar_num)
change_one_bar(this->aperture_base[bar_num], this->aperture_size[bar_num],
this->bars[bar_num] & ~15, bar_num);
// copy aperture address to CONFIG_CNTL:CFG_MEM_AP_LOC
insert_bits<uint32_t>(this->config_cntl, this->aperture_base[0] >> 22,
insert_bits<uint32_t>(this->config_cntl[0], this->aperture_base[0] >> 22,
ATI_CFG_MEM_AP_LOC, ATI_CFG_MEM_AP_LOC_size);
}
@ -306,22 +305,31 @@ bool AtiMach64Gx::pci_io_write(uint32_t offset, uint32_t value, uint32_t size)
// CONFIG_CNTL is accessible from I/O space only
if ((offset >> 2) == ATI_CONFIG_CNTL) {
if (size + (offset & 3) > 4)
LOG_F(ERROR, "%s: size + offset > 4!", this->name.c_str());
write_mem(((uint8_t *)&this->config_cntl) + (offset & 3), value, size);
switch (this->config_cntl & 3) {
if (offset == ATI_CONFIG_CNTL << 2) {
switch (extract_bits<uint32_t>(this->config_cntl[0], ATI_CFG_MEM_AP_SIZE, ATI_CFG_MEM_AP_SIZE_size)) {
case 0:
LOG_F(WARNING, "%s: linear aperture disabled!", this->name.c_str());
LOG_F(WARNING, "%s: CONFIG_CNTL linear aperture disabled!", this->name.c_str());
break;
case 1:
LOG_F(INFO, "%s: aperture size set to 4MB", this->name.c_str());
LOG_F(INFO, "%s: CONFIG_CNTL aperture size set to 4MB", this->name.c_str());
this->mm_regs_offset = MM_REGS_2_OFF;
break;
case 2:
LOG_F(INFO, "%s: aperture size set to 8MB", this->name.c_str());
LOG_F(INFO, "%s: CONFIG_CNTL aperture size set to 8MB", this->name.c_str());
this->mm_regs_offset = MM_REGS_0_OFF;
break;
default:
LOG_F(ERROR, "%s: invalid aperture size in CONFIG_CNTL", this->name.c_str());
LOG_F(ERROR, "%s: CONFIG_CNTL invalid aperture size", this->name.c_str());
}
}
LOG_F(INFO, "%s: write %s %04x.%c = %0*x = %08x", this->name.c_str(),
get_reg_name(offset >> 2), offset, SIZE_ARG(size), size * 2,
value, this->config_cntl[0]
);
} else {
this->write_reg(offset, BYTESWAP_SIZED(value, size), size);
}

5
devices/video/atimach64gx.h
View File

@ -27,6 +27,7 @@ along with this program. If not, see <https://www.gnu.org/licenses/>.
#include <devices/common/pci/pcidevice.h>
#include <devices/video/displayid.h>
#include <devices/video/videoctrl.h>
#include <devices/video/atimach64defs.h>
#include <cinttypes>
#include <memory>
@ -83,8 +84,8 @@ private:
const uint32_t aperture_flag[1] = { 0 };
uint32_t aperture_base[1] = { 0 };
uint32_t config_cntl = 0;
uint32_t mm_regs_offset = 0;
uint32_t config_cntl[2] = { 2, 0 };
uint32_t mm_regs_offset = MM_REGS_0_OFF;
// RGB514 RAMDAC state
uint8_t dac_idx_lo = 0;