1/*
 2 * Copyright 2010 Red Hat Inc.
 3 *
 4 * Permission is hereby granted, free of charge, to any person obtaining a
 5 * copy of this software and associated documentation files (the "Software"),
 6 * to deal in the Software without restriction, including without limitation
 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 8 * and/or sell copies of the Software, and to permit persons to whom the
 9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * Authors: Ben Skeggs
23 */
24
25#include "drmP.h"
26#include "nouveau_drv.h"
27#include "nouveau_hw.h"
28#include "nouveau_pm.h"
29
30struct nv04_pm_state {
31	struct pll_lims pll;
32	struct nouveau_pll_vals calc;
33};
34
35int
36nv04_pm_clock_get(struct drm_device *dev, u32 id)
37{
38	return nouveau_hw_get_clock(dev, id);
39}
40
41void *
42nv04_pm_clock_pre(struct drm_device *dev, struct nouveau_pm_level *perflvl,
43		  u32 id, int khz)
44{
45	struct nv04_pm_state *state;
46	int ret;
47
48	state = kzalloc(sizeof(*state), GFP_KERNEL);
49	if (!state)
50		return ERR_PTR(-ENOMEM);
51
52	ret = get_pll_limits(dev, id, &state->pll);
53	if (ret) {
54		kfree(state);
55		return (ret == -ENOENT) ? NULL : ERR_PTR(ret);
56	}
57
58	ret = nouveau_calc_pll_mnp(dev, &state->pll, khz, &state->calc);
59	if (!ret) {
60		kfree(state);
61		return ERR_PTR(-EINVAL);
62	}
63
64	return state;
65}
66
67void
68nv04_pm_clock_set(struct drm_device *dev, void *pre_state)
69{
70	struct drm_nouveau_private *dev_priv = dev->dev_private;
71	struct nv04_pm_state *state = pre_state;
72	u32 reg = state->pll.reg;
73
74	/* thank the insane nouveau_hw_setpll() interface for this */
75	if (dev_priv->card_type >= NV_40)
76		reg += 4;
77
78	nouveau_hw_setpll(dev, reg, &state->calc);
79
80	if (dev_priv->card_type < NV_30 && reg == NV_PRAMDAC_MPLL_COEFF) {
81		if (dev_priv->card_type == NV_20)
82			nv_mask(dev, 0x1002c4, 0, 1 << 20);
83
84		/* Reset the DLLs */
85		nv_mask(dev, 0x1002c0, 0, 1 << 8);
86	}
87
88	kfree(state);
89}
90