[linux-2.6-block.git] / drivers / clk / bcm / clk-iproc.h

/*
 * Copyright (C) 2014 Broadcom Corporation
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation version 2.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
 * kind, whether express or implied; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#ifndef _CLK_IPROC_H
#define _CLK_IPROC_H

#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/slab.h>
#include <linux/device.h>
#include <linux/of.h>
#include <linux/clk-provider.h>

#define IPROC_CLK_NAME_LEN 25
#define IPROC_CLK_INVALID_OFFSET 0xffffffff
#define bit_mask(width) ((1 << (width)) - 1)

/* clocks that should not be disabled at runtime */
#define IPROC_CLK_AON BIT(0)

/* PLL that requires gating through ASIU */
#define IPROC_CLK_PLL_ASIU BIT(1)

/* PLL that has fractional part of the NDIV */
#define IPROC_CLK_PLL_HAS_NDIV_FRAC BIT(2)

/*
 * Some of the iProc PLL/clocks may have an ASIC bug that requires read back
 * of the same register following the write to flush the write transaction into
 * the intended register
 */
#define IPROC_CLK_NEEDS_READ_BACK BIT(3)

/*
 * Some PLLs require the PLL SW override bit to be set before changes can be
 * applied to the PLL
 */
#define IPROC_CLK_PLL_NEEDS_SW_CFG BIT(4)

/*
 * Some PLLs use a different way to control clock power, via the PWRDWN bit in
 * the PLL control register
 */
#define IPROC_CLK_EMBED_PWRCTRL BIT(5)

/*
 * Some PLLs have separate registers for Status and Control.  Identify this to
 * let the driver know if additional registers need to be used
 */
#define IPROC_CLK_PLL_SPLIT_STAT_CTRL BIT(6)

/*
 * Some PLLs have an additional divide by 2 in master clock calculation;
 * MCLK = VCO_freq / (Mdiv * 2). Identify this to let the driver know
 * of modified calculations
 */
#define IPROC_CLK_MCLK_DIV_BY_2 BIT(7)

/*
 * Some PLLs provide a look up table for the leaf clock frequencies and
 * auto calculates VCO frequency parameters based on the provided leaf
 * clock frequencies. They have a user mode that allows the divider
 * controls to be determined by the user
 */
#define IPROC_CLK_PLL_USER_MODE_ON BIT(8)

/*
 * Some PLLs have an active low reset
 */
#define IPROC_CLK_PLL_RESET_ACTIVE_LOW BIT(9)

/*
 * Parameters for VCO frequency configuration
 *
 * VCO frequency =
 * ((ndiv_int + ndiv_frac / 2^20) * (ref freqeuncy  / pdiv)
 */
struct iproc_pll_vco_param {
	unsigned long rate;
	unsigned int ndiv_int;
	unsigned int ndiv_frac;
	unsigned int pdiv;
};

struct iproc_clk_reg_op {
	unsigned int offset;
	unsigned int shift;
	unsigned int width;
};

/*
 * Clock gating control at the top ASIU level
 */
struct iproc_asiu_gate {
	unsigned int offset;
	unsigned int en_shift;
};

/*
 * Control of powering on/off of a PLL
 *
 * Before powering off a PLL, input isolation (ISO) needs to be enabled
 */
struct iproc_pll_aon_pwr_ctrl {
	unsigned int offset;
	unsigned int pwr_width;
	unsigned int pwr_shift;
	unsigned int iso_shift;
};

/*
 * Control of the PLL reset
 */
struct iproc_pll_reset_ctrl {
	unsigned int offset;
	unsigned int reset_shift;
	unsigned int p_reset_shift;
};

/*
 * Control of the Ki, Kp, and Ka parameters
 */
struct iproc_pll_dig_filter_ctrl {
	unsigned int offset;
	unsigned int ki_shift;
	unsigned int ki_width;
	unsigned int kp_shift;
	unsigned int kp_width;
	unsigned int ka_shift;
	unsigned int ka_width;
};

/*
 * To enable SW control of the PLL
 */
struct iproc_pll_sw_ctrl {
	unsigned int offset;
	unsigned int shift;
};

struct iproc_pll_vco_ctrl {
	unsigned int u_offset;
	unsigned int l_offset;
};

/*
 * Main PLL control parameters
 */
struct iproc_pll_ctrl {
	unsigned long flags;
	struct iproc_pll_aon_pwr_ctrl aon;
	struct iproc_asiu_gate asiu;
	struct iproc_pll_reset_ctrl reset;
	struct iproc_pll_dig_filter_ctrl dig_filter;
	struct iproc_pll_sw_ctrl sw_ctrl;
	struct iproc_clk_reg_op ndiv_int;
	struct iproc_clk_reg_op ndiv_frac;
	struct iproc_clk_reg_op pdiv;
	struct iproc_pll_vco_ctrl vco_ctrl;
	struct iproc_clk_reg_op status;
	struct iproc_clk_reg_op macro_mode;
};

/*
 * Controls enabling/disabling a PLL derived clock
 */
struct iproc_clk_enable_ctrl {
	unsigned int offset;
	unsigned int enable_shift;
	unsigned int hold_shift;
	unsigned int bypass_shift;
};

/*
 * Main clock control parameters for clocks derived from the PLLs
 */
struct iproc_clk_ctrl {
	unsigned int channel;
	unsigned long flags;
	struct iproc_clk_enable_ctrl enable;
	struct iproc_clk_reg_op mdiv;
};

/*
 * Divisor of the ASIU clocks
 */
struct iproc_asiu_div {
	unsigned int offset;
	unsigned int en_shift;
	unsigned int high_shift;
	unsigned int high_width;
	unsigned int low_shift;
	unsigned int low_width;
};

void iproc_armpll_setup(struct device_node *node);
void iproc_pll_clk_setup(struct device_node *node,
			 const struct iproc_pll_ctrl *pll_ctrl,
			 const struct iproc_pll_vco_param *vco,
			 unsigned int num_vco_entries,
			 const struct iproc_clk_ctrl *clk_ctrl,
			 unsigned int num_clks);
void iproc_asiu_setup(struct device_node *node,
		      const struct iproc_asiu_div *div,
		      const struct iproc_asiu_gate *gate,
		      unsigned int num_clks);

#endif /* _CLK_IPROC_H */
Commit	Line	Data
5fe225c1 RJ	1	/*
	2	* Copyright (C) 2014 Broadcom Corporation
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License as
	6	* published by the Free Software Foundation version 2.
	7	*
	8	* This program is distributed "as is" WITHOUT ANY WARRANTY of any
	9	* kind, whether express or implied; without even the implied warranty
	10	* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	* GNU General Public License for more details.
	12	*/
	13
	14	#ifndef _CLK_IPROC_H
	15	#define _CLK_IPROC_H
	16
	17	#include <linux/kernel.h>
	18	#include <linux/list.h>
	19	#include <linux/spinlock.h>
	20	#include <linux/slab.h>
	21	#include <linux/device.h>
	22	#include <linux/of.h>
	23	#include <linux/clk-provider.h>
	24
	25	#define IPROC_CLK_NAME_LEN 25
	26	#define IPROC_CLK_INVALID_OFFSET 0xffffffff
	27	#define bit_mask(width) ((1 << (width)) - 1)
	28
	29	/* clocks that should not be disabled at runtime */
	30	#define IPROC_CLK_AON BIT(0)
	31
	32	/* PLL that requires gating through ASIU */
	33	#define IPROC_CLK_PLL_ASIU BIT(1)
	34
	35	/* PLL that has fractional part of the NDIV */
	36	#define IPROC_CLK_PLL_HAS_NDIV_FRAC BIT(2)
	37
	38	/*
	39	* Some of the iProc PLL/clocks may have an ASIC bug that requires read back
	40	* of the same register following the write to flush the write transaction into
	41	* the intended register
	42	*/
	43	#define IPROC_CLK_NEEDS_READ_BACK BIT(3)
	44
	45	/*
	46	* Some PLLs require the PLL SW override bit to be set before changes can be
	47	* applied to the PLL
	48	*/
	49	#define IPROC_CLK_PLL_NEEDS_SW_CFG BIT(4)
	50
01b6722f JM	51	/*
	52	* Some PLLs use a different way to control clock power, via the PWRDWN bit in
	53	* the PLL control register
	54	*/
	55	#define IPROC_CLK_EMBED_PWRCTRL BIT(5)
	56
40c8bec3 JM	57	/*
	58	* Some PLLs have separate registers for Status and Control. Identify this to
	59	* let the driver know if additional registers need to be used
	60	*/
	61	#define IPROC_CLK_PLL_SPLIT_STAT_CTRL BIT(6)
	62
bcd8be13 SR	63	/*
	64	* Some PLLs have an additional divide by 2 in master clock calculation;
	65	* MCLK = VCO_freq / (Mdiv * 2). Identify this to let the driver know
	66	* of modified calculations
	67	*/
	68	#define IPROC_CLK_MCLK_DIV_BY_2 BIT(7)
	69
	70	/*
	71	* Some PLLs provide a look up table for the leaf clock frequencies and
	72	* auto calculates VCO frequency parameters based on the provided leaf
	73	* clock frequencies. They have a user mode that allows the divider
	74	* controls to be determined by the user
	75	*/
	76	#define IPROC_CLK_PLL_USER_MODE_ON BIT(8)
	77
	78	/*
	79	* Some PLLs have an active low reset
	80	*/
	81	#define IPROC_CLK_PLL_RESET_ACTIVE_LOW BIT(9)
	82
5fe225c1 RJ	83	/*
	84	* Parameters for VCO frequency configuration
	85	*
	86	* VCO frequency =
	87	* ((ndiv_int + ndiv_frac / 2^20) * (ref freqeuncy / pdiv)
	88	*/
	89	struct iproc_pll_vco_param {
	90	unsigned long rate;
	91	unsigned int ndiv_int;
	92	unsigned int ndiv_frac;
	93	unsigned int pdiv;
	94	};
	95
	96	struct iproc_clk_reg_op {
	97	unsigned int offset;
	98	unsigned int shift;
	99	unsigned int width;
	100	};
	101
	102	/*
	103	* Clock gating control at the top ASIU level
	104	*/
	105	struct iproc_asiu_gate {
	106	unsigned int offset;
	107	unsigned int en_shift;
	108	};
	109
	110	/*
	111	* Control of powering on/off of a PLL
	112	*
	113	* Before powering off a PLL, input isolation (ISO) needs to be enabled
	114	*/
	115	struct iproc_pll_aon_pwr_ctrl {
	116	unsigned int offset;
	117	unsigned int pwr_width;
	118	unsigned int pwr_shift;
	119	unsigned int iso_shift;
	120	};
	121
	122	/*
f713c6bf	123	* Control of the PLL reset
5fe225c1 RJ	124	*/
	125	struct iproc_pll_reset_ctrl {
	126	unsigned int offset;
	127	unsigned int reset_shift;
	128	unsigned int p_reset_shift;
f713c6bf JM	129	};
	130
	131	/*
	132	* Control of the Ki, Kp, and Ka parameters
	133	*/
	134	struct iproc_pll_dig_filter_ctrl {
	135	unsigned int offset;
5fe225c1 RJ	136	unsigned int ki_shift;
	137	unsigned int ki_width;
	138	unsigned int kp_shift;
	139	unsigned int kp_width;
	140	unsigned int ka_shift;
	141	unsigned int ka_width;
	142	};
	143
	144	/*
	145	* To enable SW control of the PLL
	146	*/
	147	struct iproc_pll_sw_ctrl {
	148	unsigned int offset;
	149	unsigned int shift;
	150	};
	151
	152	struct iproc_pll_vco_ctrl {
	153	unsigned int u_offset;
	154	unsigned int l_offset;
	155	};
	156
	157	/*
	158	* Main PLL control parameters
	159	*/
	160	struct iproc_pll_ctrl {
	161	unsigned long flags;
	162	struct iproc_pll_aon_pwr_ctrl aon;
	163	struct iproc_asiu_gate asiu;
	164	struct iproc_pll_reset_ctrl reset;
f713c6bf	165	struct iproc_pll_dig_filter_ctrl dig_filter;
5fe225c1 RJ	166	struct iproc_pll_sw_ctrl sw_ctrl;
	167	struct iproc_clk_reg_op ndiv_int;
	168	struct iproc_clk_reg_op ndiv_frac;
	169	struct iproc_clk_reg_op pdiv;
	170	struct iproc_pll_vco_ctrl vco_ctrl;
	171	struct iproc_clk_reg_op status;
bcd8be13	172	struct iproc_clk_reg_op macro_mode;
5fe225c1 RJ	173	};
	174
	175	/*
	176	* Controls enabling/disabling a PLL derived clock
	177	*/
	178	struct iproc_clk_enable_ctrl {
	179	unsigned int offset;
	180	unsigned int enable_shift;
	181	unsigned int hold_shift;
	182	unsigned int bypass_shift;
	183	};
	184
	185	/*
	186	* Main clock control parameters for clocks derived from the PLLs
	187	*/
	188	struct iproc_clk_ctrl {
	189	unsigned int channel;
	190	unsigned long flags;
	191	struct iproc_clk_enable_ctrl enable;
	192	struct iproc_clk_reg_op mdiv;
	193	};
	194
	195	/*
	196	* Divisor of the ASIU clocks
	197	*/
	198	struct iproc_asiu_div {
	199	unsigned int offset;
	200	unsigned int en_shift;
	201	unsigned int high_shift;
	202	unsigned int high_width;
	203	unsigned int low_shift;
	204	unsigned int low_width;
	205	};
	206
df416e56 RJ	207	void iproc_armpll_setup(struct device_node *node);
	208	void iproc_pll_clk_setup(struct device_node *node,
	209	const struct iproc_pll_ctrl *pll_ctrl,
	210	const struct iproc_pll_vco_param *vco,
	211	unsigned int num_vco_entries,
	212	const struct iproc_clk_ctrl *clk_ctrl,
	213	unsigned int num_clks);
	214	void iproc_asiu_setup(struct device_node *node,
	215	const struct iproc_asiu_div *div,
	216	const struct iproc_asiu_gate *gate,
	217	unsigned int num_clks);
5fe225c1 RJ	218
5fe225c1 RJ	219	#endif /* _CLK_IPROC_H */