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/*
* Copyright 2013 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 "ramnv40.h"
#include <subdev/bios.h>
#include <subdev/bios/bit.h>
#include <subdev/bios/init.h>
#include <subdev/bios/pll.h>
#include <subdev/clk/pll.h>
#include <subdev/timer.h>
static int
nv40_ram_calc(struct nvkm_ram *base, u32 freq)
{
struct nv40_ram *ram = nv40_ram(base);
struct nvkm_subdev *subdev = &ram->base.fb->subdev;
struct nvkm_bios *bios = subdev->device->bios;
struct nvbios_pll pll;
int N1, M1, N2, M2;
int log2P, ret;
ret = nvbios_pll_parse(bios, 0x04, &pll);
if (ret) {
nvkm_error(subdev, "mclk pll data not found\n");
return ret;
}
ret = nv04_pll_calc(subdev, &pll, freq, &N1, &M1, &N2, &M2, &log2P);
if (ret < 0)
return ret;
ram->ctrl = 0x80000000 | (log2P << 16);
ram->ctrl |= min(pll.bias_p + log2P, (int)pll.max_p) << 20;
if (N2 == M2) {
ram->ctrl |= 0x00000100;
ram->coef = (N1 << 8) | M1;
} else {
ram->ctrl |= 0x40000000;
ram->coef = (N2 << 24) | (M2 << 16) | (N1 << 8) | M1;
}
return 0;
}
static int
nv40_ram_prog(struct nvkm_ram *base)
{
struct nv40_ram *ram = nv40_ram(base);
struct nvkm_subdev *subdev = &ram->base.fb->subdev;
struct nvkm_device *device = subdev->device;
struct nvkm_bios *bios = device->bios;
struct bit_entry M;
u32 crtc_mask = 0;
u8 sr1[2];
int i;
/* determine which CRTCs are active, fetch VGA_SR1 for each */
for (i = 0; i < 2; i++) {
u32 vbl = nvkm_rd32(device, 0x600808 + (i * 0x2000));
u32 cnt = 0;
do {
if (vbl != nvkm_rd32(device, 0x600808 + (i * 0x2000))) {
nvkm_wr08(device, 0x0c03c4 + (i * 0x2000), 0x01);
sr1[i] = nvkm_rd08(device, 0x0c03c5 + (i * 0x2000));
if (!(sr1[i] & 0x20))
crtc_mask |= (1 << i);
break;
}
udelay(1);
} while (cnt++ < 32);
}
/* wait for vblank start on active crtcs, disable memory access */
for (i = 0; i < 2; i++) {
if (!(crtc_mask & (1 << i)))
continue;
nvkm_msec(device, 2000,
u32 tmp = nvkm_rd32(device, 0x600808 + (i * 0x2000));
if (!(tmp & 0x00010000))
break;
);
nvkm_msec(device, 2000,
u32 tmp = nvkm_rd32(device, 0x600808 + (i * 0x2000));
if ( (tmp & 0x00010000))
break;
);
nvkm_wr08(device, 0x0c03c4 + (i * 0x2000), 0x01);
nvkm_wr08(device, 0x0c03c5 + (i * 0x2000), sr1[i] | 0x20);
}
/* prepare ram for reclocking */
nvkm_wr32(device, 0x1002d4, 0x00000001); /* precharge */
nvkm_wr32(device, 0x1002d0, 0x00000001); /* refresh */
nvkm_wr32(device, 0x1002d0, 0x00000001); /* refresh */
nvkm_mask(device, 0x100210, 0x80000000, 0x00000000); /* no auto refresh */
nvkm_wr32(device, 0x1002dc, 0x00000001); /* enable self-refresh */
/* change the PLL of each memory partition */
nvkm_mask(device, 0x00c040, 0x0000c000, 0x00000000);
switch (device->chipset) {
case 0x40:
case 0x45:
case 0x41:
case 0x42:
case 0x47:
nvkm_mask(device, 0x004044, 0xc0771100, ram->ctrl);
nvkm_mask(device, 0x00402c, 0xc0771100, ram->ctrl);
nvkm_wr32(device, 0x004048, ram->coef);
nvkm_wr32(device, 0x004030, ram->coef);
/* fall through */
case 0x43:
case 0x49:
case 0x4b:
nvkm_mask(device, 0x004038, 0xc0771100, ram->ctrl);
nvkm_wr32(device, 0x00403c, ram->coef);
/* fall through */
default:
nvkm_mask(device, 0x004020, 0xc0771100, ram->ctrl);
nvkm_wr32(device, 0x004024, ram->coef);
break;
}
udelay(100);
nvkm_mask(device, 0x00c040, 0x0000c000, 0x0000c000);
/* re-enable normal operation of memory controller */
nvkm_wr32(device, 0x1002dc, 0x00000000);
nvkm_mask(device, 0x100210, 0x80000000, 0x80000000);
udelay(100);
/* execute memory reset script from vbios */
if (!bit_entry(bios, 'M', &M))
nvbios_init(subdev, nvbios_rd16(bios, M.offset + 0x00));
/* make sure we're in vblank (hopefully the same one as before), and
* then re-enable crtc memory access
*/
for (i = 0; i < 2; i++) {
if (!(crtc_mask & (1 << i)))
continue;
nvkm_msec(device, 2000,
u32 tmp = nvkm_rd32(device, 0x600808 + (i * 0x2000));
if ( (tmp & 0x00010000))
break;
);
nvkm_wr08(device, 0x0c03c4 + (i * 0x2000), 0x01);
nvkm_wr08(device, 0x0c03c5 + (i * 0x2000), sr1[i]);
}
return 0;
}
static void
nv40_ram_tidy(struct nvkm_ram *base)
{
}
static const struct nvkm_ram_func
nv40_ram_func = {
.calc = nv40_ram_calc,
.prog = nv40_ram_prog,
.tidy = nv40_ram_tidy,
};
int
nv40_ram_new_(struct nvkm_fb *fb, enum nvkm_ram_type type, u64 size,
struct nvkm_ram **pram)
{
struct nv40_ram *ram;
if (!(ram = kzalloc(sizeof(*ram), GFP_KERNEL)))
return -ENOMEM;
*pram = &ram->base;
return nvkm_ram_ctor(&nv40_ram_func, fb, type, size, &ram->base);
}
int
nv40_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
{
struct nvkm_device *device = fb->subdev.device;
u32 pbus1218 = nvkm_rd32(device, 0x001218);
u32 size = nvkm_rd32(device, 0x10020c) & 0xff000000;
enum nvkm_ram_type type = NVKM_RAM_TYPE_UNKNOWN;
int ret;
switch (pbus1218 & 0x00000300) {
case 0x00000000: type = NVKM_RAM_TYPE_SDRAM; break;
case 0x00000100: type = NVKM_RAM_TYPE_DDR1 ; break;
case 0x00000200: type = NVKM_RAM_TYPE_GDDR3; break;
case 0x00000300: type = NVKM_RAM_TYPE_DDR2 ; break;
}
ret = nv40_ram_new_(fb, type, size, pram);
if (ret)
return ret;
(*pram)->parts = (nvkm_rd32(device, 0x100200) & 0x00000003) + 1;
return 0;
}
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