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linux/drivers/gpu/drm/nouveau/nva3_pm.c
Linus Torvalds 612a9aab56 Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 
Pull drm merge (part 1) from Dave Airlie:
 "So first of all my tree and uapi stuff has a conflict mess, its my
  fault as the nouveau stuff didn't hit -next as were trying to rebase
  regressions out of it before we merged.

  Highlights:
   - SH mobile modesetting driver and associated helpers
   - some DRM core documentation
   - i915 modesetting rework, haswell hdmi, haswell and vlv fixes, write
     combined pte writing, ilk rc6 support,
   - nouveau: major driver rework into a hw core driver, makes features
     like SLI a lot saner to implement,
   - psb: add eDP/DP support for Cedarview
   - radeon: 2 layer page tables, async VM pte updates, better PLL
     selection for > 2 screens, better ACPI interactions

  The rest is general grab bag of fixes.

  So why part 1? well I have the exynos pull req which came in a bit
  late but was waiting for me to do something they shouldn't have and it
  looks fairly safe, and David Howells has some more header cleanups
  he'd like me to pull, that seem like a good idea, but I'd like to get
  this merge out of the way so -next dosen't get blocked."

Tons of conflicts mostly due to silly include line changes, but mostly
mindless.  A few other small semantic conflicts too, noted from Dave's
pre-merged branch.

* 'drm-next' of git://people.freedesktop.org/~airlied/linux: (447 commits)
  drm/nv98/crypt: fix fuc build with latest envyas
  drm/nouveau/devinit: fixup various issues with subdev ctor/init ordering
  drm/nv41/vm: fix and enable use of "real" pciegart
  drm/nv44/vm: fix and enable use of "real" pciegart
  drm/nv04/dmaobj: fixup vm target handling in preparation for nv4x pcie
  drm/nouveau: store supported dma mask in vmmgr
  drm/nvc0/ibus: initial implementation of subdev
  drm/nouveau/therm: add support for fan-control modes
  drm/nouveau/hwmon: rename pwm0* to pmw1* to follow hwmon's rules
  drm/nouveau/therm: calculate the pwm divisor on nv50+
  drm/nouveau/fan: rewrite the fan tachometer driver to get more precision, faster
  drm/nouveau/therm: move thermal-related functions to the therm subdev
  drm/nouveau/bios: parse the pwm divisor from the perf table
  drm/nouveau/therm: use the EXTDEV table to detect i2c monitoring devices
  drm/nouveau/therm: rework thermal table parsing
  drm/nouveau/gpio: expose the PWM/TOGGLE parameter found in the gpio vbios table
  drm/nouveau: fix pm initialization order
  drm/nouveau/bios: check that fixed tvdac gpio data is valid before using it
  drm/nouveau: log channel debug/error messages from client object rather than drm client
  drm/nouveau: have drm debugging macros build on top of core macros
  ...
2012-10-03 23:29:23 -07:00

625 lines
17 KiB
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/*
* Copyright 2010 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 <drm/drmP.h>
#include "nouveau_drm.h"
#include "nouveau_bios.h"
#include "nouveau_pm.h"
#include <subdev/bios/pll.h>
#include <subdev/bios.h>
#include <subdev/clock.h>
#include <subdev/timer.h>
#include <subdev/fb.h>
static u32 read_clk(struct drm_device *, int, bool);
static u32 read_pll(struct drm_device *, int, u32);
static u32
read_vco(struct drm_device *dev, int clk)
{
struct nouveau_device *device = nouveau_dev(dev);
u32 sctl = nv_rd32(device, 0x4120 + (clk * 4));
if ((sctl & 0x00000030) != 0x00000030)
return read_pll(dev, 0x41, 0x00e820);
return read_pll(dev, 0x42, 0x00e8a0);
}
static u32
read_clk(struct drm_device *dev, int clk, bool ignore_en)
{
struct nouveau_device *device = nouveau_dev(dev);
struct nouveau_drm *drm = nouveau_drm(dev);
u32 sctl, sdiv, sclk;
/* refclk for the 0xe8xx plls is a fixed frequency */
if (clk >= 0x40) {
if (nv_device(drm->device)->chipset == 0xaf) {
/* no joke.. seriously.. sigh.. */
return nv_rd32(device, 0x00471c) * 1000;
}
return device->crystal;
}
sctl = nv_rd32(device, 0x4120 + (clk * 4));
if (!ignore_en && !(sctl & 0x00000100))
return 0;
switch (sctl & 0x00003000) {
case 0x00000000:
return device->crystal;
case 0x00002000:
if (sctl & 0x00000040)
return 108000;
return 100000;
case 0x00003000:
sclk = read_vco(dev, clk);
sdiv = ((sctl & 0x003f0000) >> 16) + 2;
return (sclk * 2) / sdiv;
default:
return 0;
}
}
static u32
read_pll(struct drm_device *dev, int clk, u32 pll)
{
struct nouveau_device *device = nouveau_dev(dev);
u32 ctrl = nv_rd32(device, pll + 0);
u32 sclk = 0, P = 1, N = 1, M = 1;
if (!(ctrl & 0x00000008)) {
if (ctrl & 0x00000001) {
u32 coef = nv_rd32(device, pll + 4);
M = (coef & 0x000000ff) >> 0;
N = (coef & 0x0000ff00) >> 8;
P = (coef & 0x003f0000) >> 16;
/* no post-divider on these.. */
if ((pll & 0x00ff00) == 0x00e800)
P = 1;
sclk = read_clk(dev, 0x00 + clk, false);
}
} else {
sclk = read_clk(dev, 0x10 + clk, false);
}
if (M * P)
return sclk * N / (M * P);
return 0;
}
struct creg {
u32 clk;
u32 pll;
};
static int
calc_clk(struct drm_device *dev, int clk, u32 pll, u32 khz, struct creg *reg)
{
struct nouveau_drm *drm = nouveau_drm(dev);
struct nouveau_device *device = nouveau_dev(dev);
struct nouveau_bios *bios = nouveau_bios(device);
struct nvbios_pll limits;
u32 oclk, sclk, sdiv;
int P, N, M, diff;
int ret;
reg->pll = 0;
reg->clk = 0;
if (!khz) {
NV_DEBUG(drm, "no clock for 0x%04x/0x%02x\n", pll, clk);
return 0;
}
switch (khz) {
case 27000:
reg->clk = 0x00000100;
return khz;
case 100000:
reg->clk = 0x00002100;
return khz;
case 108000:
reg->clk = 0x00002140;
return khz;
default:
sclk = read_vco(dev, clk);
sdiv = min((sclk * 2) / (khz - 2999), (u32)65);
/* if the clock has a PLL attached, and we can get a within
* [-2, 3) MHz of a divider, we'll disable the PLL and use
* the divider instead.
*
* divider can go as low as 2, limited here because NVIDIA
* and the VBIOS on my NVA8 seem to prefer using the PLL
* for 810MHz - is there a good reason?
*/
if (sdiv > 4) {
oclk = (sclk * 2) / sdiv;
diff = khz - oclk;
if (!pll || (diff >= -2000 && diff < 3000)) {
reg->clk = (((sdiv - 2) << 16) | 0x00003100);
return oclk;
}
}
if (!pll) {
NV_ERROR(drm, "bad freq %02x: %d %d\n", clk, khz, sclk);
return -ERANGE;
}
break;
}
ret = nvbios_pll_parse(bios, pll, &limits);
if (ret)
return ret;
limits.refclk = read_clk(dev, clk - 0x10, true);
if (!limits.refclk)
return -EINVAL;
ret = nva3_calc_pll(dev, &limits, khz, &N, NULL, &M, &P);
if (ret >= 0) {
reg->clk = nv_rd32(device, 0x4120 + (clk * 4));
reg->pll = (P << 16) | (N << 8) | M;
}
return ret;
}
static void
prog_pll(struct drm_device *dev, int clk, u32 pll, struct creg *reg)
{
struct nouveau_device *device = nouveau_dev(dev);
struct nouveau_drm *drm = nouveau_drm(dev);
const u32 src0 = 0x004120 + (clk * 4);
const u32 src1 = 0x004160 + (clk * 4);
const u32 ctrl = pll + 0;
const u32 coef = pll + 4;
if (!reg->clk && !reg->pll) {
NV_DEBUG(drm, "no clock for %02x\n", clk);
return;
}
if (reg->pll) {
nv_mask(device, src0, 0x00000101, 0x00000101);
nv_wr32(device, coef, reg->pll);
nv_mask(device, ctrl, 0x00000015, 0x00000015);
nv_mask(device, ctrl, 0x00000010, 0x00000000);
nv_wait(device, ctrl, 0x00020000, 0x00020000);
nv_mask(device, ctrl, 0x00000010, 0x00000010);
nv_mask(device, ctrl, 0x00000008, 0x00000000);
nv_mask(device, src1, 0x00000100, 0x00000000);
nv_mask(device, src1, 0x00000001, 0x00000000);
} else {
nv_mask(device, src1, 0x003f3141, 0x00000101 | reg->clk);
nv_mask(device, ctrl, 0x00000018, 0x00000018);
udelay(20);
nv_mask(device, ctrl, 0x00000001, 0x00000000);
nv_mask(device, src0, 0x00000100, 0x00000000);
nv_mask(device, src0, 0x00000001, 0x00000000);
}
}
static void
prog_clk(struct drm_device *dev, int clk, struct creg *reg)
{
struct nouveau_device *device = nouveau_dev(dev);
struct nouveau_drm *drm = nouveau_drm(dev);
if (!reg->clk) {
NV_DEBUG(drm, "no clock for %02x\n", clk);
return;
}
nv_mask(device, 0x004120 + (clk * 4), 0x003f3141, 0x00000101 | reg->clk);
}
int
nva3_pm_clocks_get(struct drm_device *dev, struct nouveau_pm_level *perflvl)
{
perflvl->core = read_pll(dev, 0x00, 0x4200);
perflvl->shader = read_pll(dev, 0x01, 0x4220);
perflvl->memory = read_pll(dev, 0x02, 0x4000);
perflvl->unka0 = read_clk(dev, 0x20, false);
perflvl->vdec = read_clk(dev, 0x21, false);
perflvl->daemon = read_clk(dev, 0x25, false);
perflvl->copy = perflvl->core;
return 0;
}
struct nva3_pm_state {
struct nouveau_pm_level *perflvl;
struct creg nclk;
struct creg sclk;
struct creg vdec;
struct creg unka0;
struct creg mclk;
u8 *rammap;
u8 rammap_ver;
u8 rammap_len;
u8 *ramcfg;
u8 ramcfg_len;
u32 r004018;
u32 r100760;
};
void *
nva3_pm_clocks_pre(struct drm_device *dev, struct nouveau_pm_level *perflvl)
{
struct nva3_pm_state *info;
u8 ramcfg_cnt;
int ret;
info = kzalloc(sizeof(*info), GFP_KERNEL);
if (!info)
return ERR_PTR(-ENOMEM);
ret = calc_clk(dev, 0x10, 0x4200, perflvl->core, &info->nclk);
if (ret < 0)
goto out;
ret = calc_clk(dev, 0x11, 0x4220, perflvl->shader, &info->sclk);
if (ret < 0)
goto out;
ret = calc_clk(dev, 0x12, 0x4000, perflvl->memory, &info->mclk);
if (ret < 0)
goto out;
ret = calc_clk(dev, 0x20, 0x0000, perflvl->unka0, &info->unka0);
if (ret < 0)
goto out;
ret = calc_clk(dev, 0x21, 0x0000, perflvl->vdec, &info->vdec);
if (ret < 0)
goto out;
info->rammap = nouveau_perf_rammap(dev, perflvl->memory,
&info->rammap_ver,
&info->rammap_len,
&ramcfg_cnt, &info->ramcfg_len);
if (info->rammap_ver != 0x10 || info->rammap_len < 5)
info->rammap = NULL;
info->ramcfg = nouveau_perf_ramcfg(dev, perflvl->memory,
&info->rammap_ver,
&info->ramcfg_len);
if (info->rammap_ver != 0x10)
info->ramcfg = NULL;
info->perflvl = perflvl;
out:
if (ret < 0) {
kfree(info);
info = ERR_PTR(ret);
}
return info;
}
static bool
nva3_pm_grcp_idle(void *data)
{
struct drm_device *dev = data;
struct nouveau_device *device = nouveau_dev(dev);
if (!(nv_rd32(device, 0x400304) & 0x00000001))
return true;
if (nv_rd32(device, 0x400308) == 0x0050001c)
return true;
return false;
}
static void
mclk_precharge(struct nouveau_mem_exec_func *exec)
{
struct nouveau_device *device = nouveau_dev(exec->dev);
nv_wr32(device, 0x1002d4, 0x00000001);
}
static void
mclk_refresh(struct nouveau_mem_exec_func *exec)
{
struct nouveau_device *device = nouveau_dev(exec->dev);
nv_wr32(device, 0x1002d0, 0x00000001);
}
static void
mclk_refresh_auto(struct nouveau_mem_exec_func *exec, bool enable)
{
struct nouveau_device *device = nouveau_dev(exec->dev);
nv_wr32(device, 0x100210, enable ? 0x80000000 : 0x00000000);
}
static void
mclk_refresh_self(struct nouveau_mem_exec_func *exec, bool enable)
{
struct nouveau_device *device = nouveau_dev(exec->dev);
nv_wr32(device, 0x1002dc, enable ? 0x00000001 : 0x00000000);
}
static void
mclk_wait(struct nouveau_mem_exec_func *exec, u32 nsec)
{
struct nouveau_device *device = nouveau_dev(exec->dev);
volatile u32 post = nv_rd32(device, 0); (void)post;
udelay((nsec + 500) / 1000);
}
static u32
mclk_mrg(struct nouveau_mem_exec_func *exec, int mr)
{
struct nouveau_device *device = nouveau_dev(exec->dev);
if (mr <= 1)
return nv_rd32(device, 0x1002c0 + ((mr - 0) * 4));
if (mr <= 3)
return nv_rd32(device, 0x1002e0 + ((mr - 2) * 4));
return 0;
}
static void
mclk_mrs(struct nouveau_mem_exec_func *exec, int mr, u32 data)
{
struct nouveau_device *device = nouveau_dev(exec->dev);
struct nouveau_fb *pfb = nouveau_fb(device);
if (mr <= 1) {
if (pfb->ram.ranks > 1)
nv_wr32(device, 0x1002c8 + ((mr - 0) * 4), data);
nv_wr32(device, 0x1002c0 + ((mr - 0) * 4), data);
} else
if (mr <= 3) {
if (pfb->ram.ranks > 1)
nv_wr32(device, 0x1002e8 + ((mr - 2) * 4), data);
nv_wr32(device, 0x1002e0 + ((mr - 2) * 4), data);
}
}
static void
mclk_clock_set(struct nouveau_mem_exec_func *exec)
{
struct nouveau_device *device = nouveau_dev(exec->dev);
struct nva3_pm_state *info = exec->priv;
u32 ctrl;
ctrl = nv_rd32(device, 0x004000);
if (!(ctrl & 0x00000008) && info->mclk.pll) {
nv_wr32(device, 0x004000, (ctrl |= 0x00000008));
nv_mask(device, 0x1110e0, 0x00088000, 0x00088000);
nv_wr32(device, 0x004018, 0x00001000);
nv_wr32(device, 0x004000, (ctrl &= ~0x00000001));
nv_wr32(device, 0x004004, info->mclk.pll);
nv_wr32(device, 0x004000, (ctrl |= 0x00000001));
udelay(64);
nv_wr32(device, 0x004018, 0x00005000 | info->r004018);
udelay(20);
} else
if (!info->mclk.pll) {
nv_mask(device, 0x004168, 0x003f3040, info->mclk.clk);
nv_wr32(device, 0x004000, (ctrl |= 0x00000008));
nv_mask(device, 0x1110e0, 0x00088000, 0x00088000);
nv_wr32(device, 0x004018, 0x0000d000 | info->r004018);
}
if (info->rammap) {
if (info->ramcfg && (info->rammap[4] & 0x08)) {
u32 unk5a0 = (ROM16(info->ramcfg[5]) << 8) |
info->ramcfg[5];
u32 unk5a4 = ROM16(info->ramcfg[7]);
u32 unk804 = (info->ramcfg[9] & 0xf0) << 16 |
(info->ramcfg[3] & 0x0f) << 16 |
(info->ramcfg[9] & 0x0f) |
0x80000000;
nv_wr32(device, 0x1005a0, unk5a0);
nv_wr32(device, 0x1005a4, unk5a4);
nv_wr32(device, 0x10f804, unk804);
nv_mask(device, 0x10053c, 0x00001000, 0x00000000);
} else {
nv_mask(device, 0x10053c, 0x00001000, 0x00001000);
nv_mask(device, 0x10f804, 0x80000000, 0x00000000);
nv_mask(device, 0x100760, 0x22222222, info->r100760);
nv_mask(device, 0x1007a0, 0x22222222, info->r100760);
nv_mask(device, 0x1007e0, 0x22222222, info->r100760);
}
}
if (info->mclk.pll) {
nv_mask(device, 0x1110e0, 0x00088000, 0x00011000);
nv_wr32(device, 0x004000, (ctrl &= ~0x00000008));
}
}
static void
mclk_timing_set(struct nouveau_mem_exec_func *exec)
{
struct nouveau_device *device = nouveau_dev(exec->dev);
struct nva3_pm_state *info = exec->priv;
struct nouveau_pm_level *perflvl = info->perflvl;
int i;
for (i = 0; i < 9; i++)
nv_wr32(device, 0x100220 + (i * 4), perflvl->timing.reg[i]);
if (info->ramcfg) {
u32 data = (info->ramcfg[2] & 0x08) ? 0x00000000 : 0x00001000;
nv_mask(device, 0x100200, 0x00001000, data);
}
if (info->ramcfg) {
u32 unk714 = nv_rd32(device, 0x100714) & ~0xf0000010;
u32 unk718 = nv_rd32(device, 0x100718) & ~0x00000100;
u32 unk71c = nv_rd32(device, 0x10071c) & ~0x00000100;
if ( (info->ramcfg[2] & 0x20))
unk714 |= 0xf0000000;
if (!(info->ramcfg[2] & 0x04))
unk714 |= 0x00000010;
nv_wr32(device, 0x100714, unk714);
if (info->ramcfg[2] & 0x01)
unk71c |= 0x00000100;
nv_wr32(device, 0x10071c, unk71c);
if (info->ramcfg[2] & 0x02)
unk718 |= 0x00000100;
nv_wr32(device, 0x100718, unk718);
if (info->ramcfg[2] & 0x10)
nv_wr32(device, 0x111100, 0x48000000); /*XXX*/
}
}
static void
prog_mem(struct drm_device *dev, struct nva3_pm_state *info)
{
struct nouveau_device *device = nouveau_dev(dev);
struct nouveau_mem_exec_func exec = {
.dev = dev,
.precharge = mclk_precharge,
.refresh = mclk_refresh,
.refresh_auto = mclk_refresh_auto,
.refresh_self = mclk_refresh_self,
.wait = mclk_wait,
.mrg = mclk_mrg,
.mrs = mclk_mrs,
.clock_set = mclk_clock_set,
.timing_set = mclk_timing_set,
.priv = info
};
u32 ctrl;
/* XXX: where the fuck does 750MHz come from? */
if (info->perflvl->memory <= 750000) {
info->r004018 = 0x10000000;
info->r100760 = 0x22222222;
}
ctrl = nv_rd32(device, 0x004000);
if (ctrl & 0x00000008) {
if (info->mclk.pll) {
nv_mask(device, 0x004128, 0x00000101, 0x00000101);
nv_wr32(device, 0x004004, info->mclk.pll);
nv_wr32(device, 0x004000, (ctrl |= 0x00000001));
nv_wr32(device, 0x004000, (ctrl &= 0xffffffef));
nv_wait(device, 0x004000, 0x00020000, 0x00020000);
nv_wr32(device, 0x004000, (ctrl |= 0x00000010));
nv_wr32(device, 0x004018, 0x00005000 | info->r004018);
nv_wr32(device, 0x004000, (ctrl |= 0x00000004));
}
} else {
u32 ssel = 0x00000101;
if (info->mclk.clk)
ssel |= info->mclk.clk;
else
ssel |= 0x00080000; /* 324MHz, shouldn't matter... */
nv_mask(device, 0x004168, 0x003f3141, ctrl);
}
if (info->ramcfg) {
if (info->ramcfg[2] & 0x10) {
nv_mask(device, 0x111104, 0x00000600, 0x00000000);
} else {
nv_mask(device, 0x111100, 0x40000000, 0x40000000);
nv_mask(device, 0x111104, 0x00000180, 0x00000000);
}
}
if (info->rammap && !(info->rammap[4] & 0x02))
nv_mask(device, 0x100200, 0x00000800, 0x00000000);
nv_wr32(device, 0x611200, 0x00003300);
if (!(info->ramcfg[2] & 0x10))
nv_wr32(device, 0x111100, 0x4c020000); /*XXX*/
nouveau_mem_exec(&exec, info->perflvl);
nv_wr32(device, 0x611200, 0x00003330);
if (info->rammap && (info->rammap[4] & 0x02))
nv_mask(device, 0x100200, 0x00000800, 0x00000800);
if (info->ramcfg) {
if (info->ramcfg[2] & 0x10) {
nv_mask(device, 0x111104, 0x00000180, 0x00000180);
nv_mask(device, 0x111100, 0x40000000, 0x00000000);
} else {
nv_mask(device, 0x111104, 0x00000600, 0x00000600);
}
}
if (info->mclk.pll) {
nv_mask(device, 0x004168, 0x00000001, 0x00000000);
nv_mask(device, 0x004168, 0x00000100, 0x00000000);
} else {
nv_mask(device, 0x004000, 0x00000001, 0x00000000);
nv_mask(device, 0x004128, 0x00000001, 0x00000000);
nv_mask(device, 0x004128, 0x00000100, 0x00000000);
}
}
int
nva3_pm_clocks_set(struct drm_device *dev, void *pre_state)
{
struct nouveau_device *device = nouveau_dev(dev);
struct nouveau_drm *drm = nouveau_drm(dev);
struct nva3_pm_state *info = pre_state;
int ret = -EAGAIN;
/* prevent any new grctx switches from starting */
nv_wr32(device, 0x400324, 0x00000000);
nv_wr32(device, 0x400328, 0x0050001c); /* wait flag 0x1c */
/* wait for any pending grctx switches to complete */
if (!nv_wait_cb(device, nva3_pm_grcp_idle, dev)) {
NV_ERROR(drm, "pm: ctxprog didn't go idle\n");
goto cleanup;
}
/* freeze PFIFO */
nv_mask(device, 0x002504, 0x00000001, 0x00000001);
if (!nv_wait(device, 0x002504, 0x00000010, 0x00000010)) {
NV_ERROR(drm, "pm: fifo didn't go idle\n");
goto cleanup;
}
prog_pll(dev, 0x00, 0x004200, &info->nclk);
prog_pll(dev, 0x01, 0x004220, &info->sclk);
prog_clk(dev, 0x20, &info->unka0);
prog_clk(dev, 0x21, &info->vdec);
if (info->mclk.clk || info->mclk.pll)
prog_mem(dev, info);
ret = 0;
cleanup:
/* unfreeze PFIFO */
nv_mask(device, 0x002504, 0x00000001, 0x00000000);
/* restore ctxprog to normal */
nv_wr32(device, 0x400324, 0x00000000);
nv_wr32(device, 0x400328, 0x0070009c); /* set flag 0x1c */
/* unblock it if necessary */
if (nv_rd32(device, 0x400308) == 0x0050001c)
nv_mask(device, 0x400824, 0x10000000, 0x10000000);
kfree(info);
return ret;
}
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