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/*
* Copyright 2012 Red Hat Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: Ben Skeggs
*/
#include <subdev/vga.h>
#include <core/device.h>
u8
nv_rdport(void *obj, int head, u16 port)
{
struct nvkm_device *device = nv_device(obj);
if (device->card_type >= NV_50)
return nv_rd08(obj, 0x601000 + port);
if (port == 0x03c0 || port == 0x03c1 || /* AR */
port == 0x03c2 || port == 0x03da || /* INP0 */
port == 0x03d4 || port == 0x03d5) /* CR */
return nv_rd08(obj, 0x601000 + (head * 0x2000) + port);
if (port == 0x03c2 || port == 0x03cc || /* MISC */
port == 0x03c4 || port == 0x03c5 || /* SR */
port == 0x03ce || port == 0x03cf) { /* GR */
if (device->card_type < NV_40)
head = 0; /* CR44 selects head */
return nv_rd08(obj, 0x0c0000 + (head * 0x2000) + port);
}
nv_error(obj, "unknown vga port 0x%04x\n", port);
return 0x00;
}
void
nv_wrport(void *obj, int head, u16 port, u8 data)
{
struct nvkm_device *device = nv_device(obj);
if (device->card_type >= NV_50)
nv_wr08(obj, 0x601000 + port, data);
else
if (port == 0x03c0 || port == 0x03c1 || /* AR */
port == 0x03c2 || port == 0x03da || /* INP0 */
port == 0x03d4 || port == 0x03d5) /* CR */
nv_wr08(obj, 0x601000 + (head * 0x2000) + port, data);
else
if (port == 0x03c2 || port == 0x03cc || /* MISC */
port == 0x03c4 || port == 0x03c5 || /* SR */
port == 0x03ce || port == 0x03cf) { /* GR */
if (device->card_type < NV_40)
head = 0; /* CR44 selects head */
nv_wr08(obj, 0x0c0000 + (head * 0x2000) + port, data);
} else
nv_error(obj, "unknown vga port 0x%04x\n", port);
}
u8
nv_rdvgas(void *obj, int head, u8 index)
{
nv_wrport(obj, head, 0x03c4, index);
return nv_rdport(obj, head, 0x03c5);
}
void
nv_wrvgas(void *obj, int head, u8 index, u8 value)
{
nv_wrport(obj, head, 0x03c4, index);
nv_wrport(obj, head, 0x03c5, value);
}
u8
nv_rdvgag(void *obj, int head, u8 index)
{
nv_wrport(obj, head, 0x03ce, index);
return nv_rdport(obj, head, 0x03cf);
}
void
nv_wrvgag(void *obj, int head, u8 index, u8 value)
{
nv_wrport(obj, head, 0x03ce, index);
nv_wrport(obj, head, 0x03cf, value);
}
u8
nv_rdvgac(void *obj, int head, u8 index)
{
nv_wrport(obj, head, 0x03d4, index);
return nv_rdport(obj, head, 0x03d5);
}
void
nv_wrvgac(void *obj, int head, u8 index, u8 value)
{
nv_wrport(obj, head, 0x03d4, index);
nv_wrport(obj, head, 0x03d5, value);
}
u8
nv_rdvgai(void *obj, int head, u16 port, u8 index)
{
if (port == 0x03c4) return nv_rdvgas(obj, head, index);
if (port == 0x03ce) return nv_rdvgag(obj, head, index);
if (port == 0x03d4) return nv_rdvgac(obj, head, index);
nv_error(obj, "unknown indexed vga port 0x%04x\n", port);
return 0x00;
}
void
nv_wrvgai(void *obj, int head, u16 port, u8 index, u8 value)
{
if (port == 0x03c4) nv_wrvgas(obj, head, index, value);
else if (port == 0x03ce) nv_wrvgag(obj, head, index, value);
else if (port == 0x03d4) nv_wrvgac(obj, head, index, value);
else nv_error(obj, "unknown indexed vga port 0x%04x\n", port);
}
bool
nv_lockvgac(void *obj, bool lock)
{
struct nvkm_device *dev = nv_device(obj);
bool locked = !nv_rdvgac(obj, 0, 0x1f);
u8 data = lock ? 0x99 : 0x57;
if (dev->card_type < NV_50)
nv_wrvgac(obj, 0, 0x1f, data);
else
nv_wrvgac(obj, 0, 0x3f, data);
if (dev->chipset == 0x11) {
if (!(nv_rd32(obj, 0x001084) & 0x10000000))
nv_wrvgac(obj, 1, 0x1f, data);
}
return locked;
}
/* CR44 takes values 0 (head A), 3 (head B) and 4 (heads tied)
* it affects only the 8 bit vga io regs, which we access using mmio at
* 0xc{0,2}3c*, 0x60{1,3}3*, and 0x68{1,3}3d*
* in general, the set value of cr44 does not matter: reg access works as
* expected and values can be set for the appropriate head by using a 0x2000
* offset as required
* however:
* a) pre nv40, the head B range of PRMVIO regs at 0xc23c* was not exposed and
* cr44 must be set to 0 or 3 for accessing values on the correct head
* through the common 0xc03c* addresses
* b) in tied mode (4) head B is programmed to the values set on head A, and
* access using the head B addresses can have strange results, ergo we leave
* tied mode in init once we know to what cr44 should be restored on exit
*
* the owner parameter is slightly abused:
* 0 and 1 are treated as head values and so the set value is (owner * 3)
* other values are treated as literal values to set
*/
u8
nv_rdvgaowner(void *obj)
{
if (nv_device(obj)->card_type < NV_50) {
if (nv_device(obj)->chipset == 0x11) {
u32 tied = nv_rd32(obj, 0x001084) & 0x10000000;
if (tied == 0) {
u8 slA = nv_rdvgac(obj, 0, 0x28) & 0x80;
u8 tvA = nv_rdvgac(obj, 0, 0x33) & 0x01;
u8 slB = nv_rdvgac(obj, 1, 0x28) & 0x80;
u8 tvB = nv_rdvgac(obj, 1, 0x33) & 0x01;
if (slA && !tvA) return 0x00;
if (slB && !tvB) return 0x03;
if (slA) return 0x00;
if (slB) return 0x03;
return 0x00;
}
return 0x04;
}
return nv_rdvgac(obj, 0, 0x44);
}
nv_error(obj, "rdvgaowner after nv4x\n");
return 0x00;
}
void
nv_wrvgaowner(void *obj, u8 select)
{
if (nv_device(obj)->card_type < NV_50) {
u8 owner = (select == 1) ? 3 : select;
if (nv_device(obj)->chipset == 0x11) {
/* workaround hw lockup bug */
nv_rdvgac(obj, 0, 0x1f);
nv_rdvgac(obj, 1, 0x1f);
}
nv_wrvgac(obj, 0, 0x44, owner);
if (nv_device(obj)->chipset == 0x11) {
nv_wrvgac(obj, 0, 0x2e, owner);
nv_wrvgac(obj, 0, 0x2e, owner);
}
} else
nv_error(obj, "wrvgaowner after nv4x\n");
}
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