2 * linux/arch/arm/mach-omap1/clock.h
4 * Copyright (C) 2004 - 2005, 2009 Nokia corporation
5 * Written by Tuukka Tikkanen <tuukka.tikkanen@elektrobit.com>
6 * Based on clocks.h by Tony Lindgren, Gordon McNutt and RidgeRun, Inc
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 #ifndef __ARCH_ARM_MACH_OMAP1_CLOCK_H
14 #define __ARCH_ARM_MACH_OMAP1_CLOCK_H
16 #include <linux/clk.h>
17 #include <linux/list.h>
19 #include <linux/clkdev.h>
29 #define CLK(dev, con, ck, cp) \
39 /* Platform flags for the clkdev-OMAP integration code */
40 #define CK_310 (1 << 0)
41 #define CK_7XX (1 << 1) /* 7xx, 850 */
42 #define CK_1510 (1 << 2)
43 #define CK_16XX (1 << 3) /* 16xx, 17xx, 5912 */
44 #define CK_1710 (1 << 4) /* 1710 extra for rate selection */
47 /* Temporary, needed during the common clock framework conversion */
48 #define __clk_get_name(clk) (clk->name)
49 #define __clk_get_parent(clk) (clk->parent)
50 #define __clk_get_rate(clk) (clk->rate)
53 * struct clkops - some clock function pointers
54 * @enable: fn ptr that enables the current clock in hardware
55 * @disable: fn ptr that enables the current clock in hardware
56 * @find_idlest: function returning the IDLEST register for the clock's IP blk
57 * @find_companion: function returning the "companion" clk reg for the clock
58 * @allow_idle: fn ptr that enables autoidle for the current clock in hardware
59 * @deny_idle: fn ptr that disables autoidle for the current clock in hardware
61 * A "companion" clk is an accompanying clock to the one being queried
62 * that must be enabled for the IP module connected to the clock to
63 * become accessible by the hardware. Neither @find_idlest nor
64 * @find_companion should be needed; that information is IP
65 * block-specific; the hwmod code has been created to handle this, but
66 * until hwmod data is ready and drivers have been converted to use PM
67 * runtime calls in place of clk_enable()/clk_disable(), @find_idlest and
68 * @find_companion must, unfortunately, remain.
71 int (*enable)(struct clk *);
72 void (*disable)(struct clk *);
73 void (*find_idlest)(struct clk *, void __iomem **,
75 void (*find_companion)(struct clk *, void __iomem **,
77 void (*allow_idle)(struct clk *);
78 void (*deny_idle)(struct clk *);
82 * struct clk.flags possibilities
84 * XXX document the rest of the clock flags here
86 * CLOCK_CLKOUTX2: (OMAP4 only) DPLL CLKOUT and CLKOUTX2 GATE_CTRL
87 * bits share the same register. This flag allows the
88 * omap4_dpllmx*() code to determine which GATE_CTRL bit field
89 * should be used. This is a temporary solution - a better approach
90 * would be to associate clock type-specific data with the clock,
91 * similar to the struct dpll_data approach.
93 #define ENABLE_REG_32BIT (1 << 0) /* Use 32-bit access */
94 #define CLOCK_IDLE_CONTROL (1 << 1)
95 #define CLOCK_NO_IDLE_PARENT (1 << 2)
96 #define ENABLE_ON_INIT (1 << 3) /* Enable upon framework init */
97 #define INVERT_ENABLE (1 << 4) /* 0 enables, 1 disables */
98 #define CLOCK_CLKOUTX2 (1 << 5)
101 * struct clk - OMAP struct clk
102 * @node: list_head connecting this clock into the full clock list
103 * @ops: struct clkops * for this clock
104 * @name: the name of the clock in the hardware (used in hwmod data and debug)
105 * @parent: pointer to this clock's parent struct clk
106 * @children: list_head connecting to the child clks' @sibling list_heads
107 * @sibling: list_head connecting this clk to its parent clk's @children
108 * @rate: current clock rate
109 * @enable_reg: register to write to enable the clock (see @enable_bit)
110 * @recalc: fn ptr that returns the clock's current rate
111 * @set_rate: fn ptr that can change the clock's current rate
112 * @round_rate: fn ptr that can round the clock's current rate
113 * @init: fn ptr to do clock-specific initialization
114 * @enable_bit: bitshift to write to enable/disable the clock (see @enable_reg)
115 * @usecount: number of users that have requested this clock to be enabled
116 * @fixed_div: when > 0, this clock's rate is its parent's rate / @fixed_div
117 * @flags: see "struct clk.flags possibilities" above
118 * @rate_offset: bitshift for rate selection bitfield (OMAP1 only)
119 * @src_offset: bitshift for source selection bitfield (OMAP1 only)
121 * XXX @rate_offset, @src_offset should probably be removed and OMAP1
122 * clock code converted to use clksel.
124 * XXX @usecount is poorly named. It should be "enable_count" or
125 * something similar. "users" in the description refers to kernel
126 * code (core code or drivers) that have called clk_enable() and not
127 * yet called clk_disable(); the usecount of parent clocks is also
128 * incremented by the clock code when clk_enable() is called on child
129 * clocks and decremented by the clock code when clk_disable() is
130 * called on child clocks.
132 * XXX @clkdm, @usecount, @children, @sibling should be marked for
135 * @children and @sibling are used to optimize parent-to-child clock
136 * tree traversals. (child-to-parent traversals use @parent.)
138 * XXX The notion of the clock's current rate probably needs to be
139 * separated from the clock's target rate.
142 struct list_head node;
143 const struct clkops *ops;
146 struct list_head children;
147 struct list_head sibling; /* node for children */
149 void __iomem *enable_reg;
150 unsigned long (*recalc)(struct clk *);
151 int (*set_rate)(struct clk *, unsigned long);
152 long (*round_rate)(struct clk *, unsigned long);
153 void (*init)(struct clk *);
160 #if defined(CONFIG_PM_DEBUG) && defined(CONFIG_DEBUG_FS)
161 struct dentry *dent; /* For visible tree hierarchy */
165 struct clk_functions {
166 int (*clk_enable)(struct clk *clk);
167 void (*clk_disable)(struct clk *clk);
168 long (*clk_round_rate)(struct clk *clk, unsigned long rate);
169 int (*clk_set_rate)(struct clk *clk, unsigned long rate);
170 int (*clk_set_parent)(struct clk *clk, struct clk *parent);
171 void (*clk_allow_idle)(struct clk *clk);
172 void (*clk_deny_idle)(struct clk *clk);
173 void (*clk_disable_unused)(struct clk *clk);
176 extern int clk_init(struct clk_functions *custom_clocks);
177 extern void clk_preinit(struct clk *clk);
178 extern int clk_register(struct clk *clk);
179 extern void clk_reparent(struct clk *child, struct clk *parent);
180 extern void clk_unregister(struct clk *clk);
181 extern void propagate_rate(struct clk *clk);
182 extern void recalculate_root_clocks(void);
183 extern unsigned long followparent_recalc(struct clk *clk);
184 extern void clk_enable_init_clocks(void);
185 unsigned long omap_fixed_divisor_recalc(struct clk *clk);
186 extern struct clk *omap_clk_get_by_name(const char *name);
187 extern int omap_clk_enable_autoidle_all(void);
188 extern int omap_clk_disable_autoidle_all(void);
190 extern const struct clkops clkops_null;
192 extern struct clk dummy_ck;
194 int omap1_clk_init(void);
195 void omap1_clk_late_init(void);
196 extern int omap1_clk_enable(struct clk *clk);
197 extern void omap1_clk_disable(struct clk *clk);
198 extern long omap1_clk_round_rate(struct clk *clk, unsigned long rate);
199 extern int omap1_clk_set_rate(struct clk *clk, unsigned long rate);
200 extern unsigned long omap1_ckctl_recalc(struct clk *clk);
201 extern int omap1_set_sossi_rate(struct clk *clk, unsigned long rate);
202 extern unsigned long omap1_sossi_recalc(struct clk *clk);
203 extern unsigned long omap1_ckctl_recalc_dsp_domain(struct clk *clk);
204 extern int omap1_clk_set_rate_dsp_domain(struct clk *clk, unsigned long rate);
205 extern int omap1_set_uart_rate(struct clk *clk, unsigned long rate);
206 extern unsigned long omap1_uart_recalc(struct clk *clk);
207 extern int omap1_set_ext_clk_rate(struct clk *clk, unsigned long rate);
208 extern long omap1_round_ext_clk_rate(struct clk *clk, unsigned long rate);
209 extern void omap1_init_ext_clk(struct clk *clk);
210 extern int omap1_select_table_rate(struct clk *clk, unsigned long rate);
211 extern long omap1_round_to_table_rate(struct clk *clk, unsigned long rate);
212 extern int omap1_clk_set_rate_ckctl_arm(struct clk *clk, unsigned long rate);
213 extern long omap1_clk_round_rate_ckctl_arm(struct clk *clk, unsigned long rate);
214 extern unsigned long omap1_watchdog_recalc(struct clk *clk);
216 #ifdef CONFIG_OMAP_RESET_CLOCKS
217 extern void omap1_clk_disable_unused(struct clk *clk);
219 #define omap1_clk_disable_unused NULL
224 unsigned long sysc_addr;
227 /* Provide a method for preventing idling some ARM IDLECT clocks */
228 struct arm_idlect1_clk {
230 unsigned long no_idle_count;
234 /* ARM_CKCTL bit shifts */
235 #define CKCTL_PERDIV_OFFSET 0
236 #define CKCTL_LCDDIV_OFFSET 2
237 #define CKCTL_ARMDIV_OFFSET 4
238 #define CKCTL_DSPDIV_OFFSET 6
239 #define CKCTL_TCDIV_OFFSET 8
240 #define CKCTL_DSPMMUDIV_OFFSET 10
241 /*#define ARM_TIMXO 12*/
243 /*#define ARM_INTHCK_SEL 14*/ /* Divide-by-2 for mpu inth_ck */
244 /* DSP_CKCTL bit shifts */
245 #define CKCTL_DSPPERDIV_OFFSET 0
247 /* ARM_IDLECT2 bit shifts */
252 #define EN_LBCK 4 /* Not on 1610/1710 */
253 /*#define EN_HSABCK 5*/
257 #define EN_GPIOCK 9 /* Not on 1610/1710 */
258 /*#define EN_LBFREECK 10*/
259 #define EN_CKOUT_ARM 11
261 /* ARM_IDLECT3 bit shifts */
266 /* DSP_IDLECT2 bit shifts (0,1,2 are same as for ARM_IDLECT2) */
267 #define EN_DSPTIMCK 5
269 /* Various register defines for clock controls scattered around OMAP chip */
270 #define SDW_MCLK_INV_BIT 2 /* In ULPD_CLKC_CTRL */
271 #define USB_MCLK_EN_BIT 4 /* In ULPD_CLKC_CTRL */
272 #define USB_HOST_HHC_UHOST_EN 9 /* In MOD_CONF_CTRL_0 */
273 #define SWD_ULPD_PLL_CLK_REQ 1 /* In SWD_CLK_DIV_CTRL_SEL */
274 #define COM_ULPD_PLL_CLK_REQ 1 /* In COM_CLK_DIV_CTRL_SEL */
275 #define SWD_CLK_DIV_CTRL_SEL 0xfffe0874
276 #define COM_CLK_DIV_CTRL_SEL 0xfffe0878
277 #define SOFT_REQ_REG 0xfffe0834
278 #define SOFT_REQ_REG2 0xfffe0880
280 extern __u32 arm_idlect1_mask;
281 extern struct clk *api_ck_p, *ck_dpll1_p, *ck_ref_p;
283 extern const struct clkops clkops_dspck;
284 extern const struct clkops clkops_dummy;
285 extern const struct clkops clkops_uart_16xx;
286 extern const struct clkops clkops_generic;
288 /* used for passing SoC type to omap1_{select,round_to}_table_rate() */