1*f7018c21STomi Valkeinen /* 2*f7018c21STomi Valkeinen * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved. 3*f7018c21STomi Valkeinen * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved. 4*f7018c21STomi Valkeinen * Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de> 5*f7018c21STomi Valkeinen * 6*f7018c21STomi Valkeinen * This program is free software; you can redistribute it and/or 7*f7018c21STomi Valkeinen * modify it under the terms of the GNU General Public 8*f7018c21STomi Valkeinen * License as published by the Free Software Foundation; 9*f7018c21STomi Valkeinen * either version 2, or (at your option) any later version. 10*f7018c21STomi Valkeinen * 11*f7018c21STomi Valkeinen * This program is distributed in the hope that it will be useful, 12*f7018c21STomi Valkeinen * but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; without even 13*f7018c21STomi Valkeinen * the implied warranty of MERCHANTABILITY or FITNESS FOR 14*f7018c21STomi Valkeinen * A PARTICULAR PURPOSE.See the GNU General Public License 15*f7018c21STomi Valkeinen * for more details. 16*f7018c21STomi Valkeinen * 17*f7018c21STomi Valkeinen * You should have received a copy of the GNU General Public License 18*f7018c21STomi Valkeinen * along with this program; if not, write to the Free Software 19*f7018c21STomi Valkeinen * Foundation, Inc., 20*f7018c21STomi Valkeinen * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 21*f7018c21STomi Valkeinen */ 22*f7018c21STomi Valkeinen /* 23*f7018c21STomi Valkeinen * clock and PLL management functions 24*f7018c21STomi Valkeinen */ 25*f7018c21STomi Valkeinen 26*f7018c21STomi Valkeinen #ifndef __VIA_CLOCK_H__ 27*f7018c21STomi Valkeinen #define __VIA_CLOCK_H__ 28*f7018c21STomi Valkeinen 29*f7018c21STomi Valkeinen #include <linux/types.h> 30*f7018c21STomi Valkeinen 31*f7018c21STomi Valkeinen enum via_clksrc { 32*f7018c21STomi Valkeinen VIA_CLKSRC_X1 = 0, 33*f7018c21STomi Valkeinen VIA_CLKSRC_TVX1, 34*f7018c21STomi Valkeinen VIA_CLKSRC_TVPLL, 35*f7018c21STomi Valkeinen VIA_CLKSRC_DVP1TVCLKR, 36*f7018c21STomi Valkeinen VIA_CLKSRC_CAP0, 37*f7018c21STomi Valkeinen VIA_CLKSRC_CAP1, 38*f7018c21STomi Valkeinen }; 39*f7018c21STomi Valkeinen 40*f7018c21STomi Valkeinen struct via_pll_config { 41*f7018c21STomi Valkeinen u16 multiplier; 42*f7018c21STomi Valkeinen u8 divisor; 43*f7018c21STomi Valkeinen u8 rshift; 44*f7018c21STomi Valkeinen }; 45*f7018c21STomi Valkeinen 46*f7018c21STomi Valkeinen struct via_clock { 47*f7018c21STomi Valkeinen void (*set_primary_clock_state)(u8 state); 48*f7018c21STomi Valkeinen void (*set_primary_clock_source)(enum via_clksrc src, bool use_pll); 49*f7018c21STomi Valkeinen void (*set_primary_pll_state)(u8 state); 50*f7018c21STomi Valkeinen void (*set_primary_pll)(struct via_pll_config config); 51*f7018c21STomi Valkeinen 52*f7018c21STomi Valkeinen void (*set_secondary_clock_state)(u8 state); 53*f7018c21STomi Valkeinen void (*set_secondary_clock_source)(enum via_clksrc src, bool use_pll); 54*f7018c21STomi Valkeinen void (*set_secondary_pll_state)(u8 state); 55*f7018c21STomi Valkeinen void (*set_secondary_pll)(struct via_pll_config config); 56*f7018c21STomi Valkeinen 57*f7018c21STomi Valkeinen void (*set_engine_pll_state)(u8 state); 58*f7018c21STomi Valkeinen void (*set_engine_pll)(struct via_pll_config config); 59*f7018c21STomi Valkeinen }; 60*f7018c21STomi Valkeinen 61*f7018c21STomi Valkeinen 62*f7018c21STomi Valkeinen static inline u32 get_pll_internal_frequency(u32 ref_freq, 63*f7018c21STomi Valkeinen struct via_pll_config pll) 64*f7018c21STomi Valkeinen { 65*f7018c21STomi Valkeinen return ref_freq / pll.divisor * pll.multiplier; 66*f7018c21STomi Valkeinen } 67*f7018c21STomi Valkeinen 68*f7018c21STomi Valkeinen static inline u32 get_pll_output_frequency(u32 ref_freq, 69*f7018c21STomi Valkeinen struct via_pll_config pll) 70*f7018c21STomi Valkeinen { 71*f7018c21STomi Valkeinen return get_pll_internal_frequency(ref_freq, pll) >> pll.rshift; 72*f7018c21STomi Valkeinen } 73*f7018c21STomi Valkeinen 74*f7018c21STomi Valkeinen void via_clock_init(struct via_clock *clock, int gfx_chip); 75*f7018c21STomi Valkeinen 76*f7018c21STomi Valkeinen #endif /* __VIA_CLOCK_H__ */ 77