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authorPaul Mundt <lethal@linux-sh.org>2006-01-17 01:14:17 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-17 02:15:28 -0500
commit36ddf31b689a8c11d424e43565d2aa440b77bbf4 (patch)
tree8cc1e98a496811126c41a9ec31f894c64bae13df /arch
parentb66c1a3919abb40f9bd8fb92a0d9fd77eb899c54 (diff)
[PATCH] sh: Simplistic clock framework
This adds a relatively simplistic clock framework for sh. The initial goal behind this is to clean up the arch/sh/kernel/time.c mess and to get the CPU subtype-specific frequency setting and calculation code moved somewhere more sensible. This only deals with the core clocks at the moment, though it's trivial for other drivers to define their own clocks as desired. Signed-off-by: Paul Mundt <lethal@linux-sh.org> Cc: john stultz <johnstul@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/sh/boards/overdrive/Makefile2
-rw-r--r--arch/sh/boards/overdrive/setup.c6
-rw-r--r--arch/sh/boards/overdrive/time.c119
-rw-r--r--arch/sh/kernel/cpu/clock.c287
-rw-r--r--arch/sh/kernel/cpu/sh3/Makefile7
-rw-r--r--arch/sh/kernel/cpu/sh3/clock-sh3.c89
-rw-r--r--arch/sh/kernel/cpu/sh3/clock-sh7300.c78
-rw-r--r--arch/sh/kernel/cpu/sh3/clock-sh7705.c84
-rw-r--r--arch/sh/kernel/cpu/sh3/clock-sh7709.c96
-rw-r--r--arch/sh/kernel/cpu/sh4/Makefile11
-rw-r--r--arch/sh/kernel/cpu/sh4/clock-sh4-202.c179
-rw-r--r--arch/sh/kernel/cpu/sh4/clock-sh4.c80
-rw-r--r--arch/sh/kernel/cpu/sh4/clock-sh73180.c81
-rw-r--r--arch/sh/kernel/cpu/sh4/clock-sh7770.c73
-rw-r--r--arch/sh/kernel/cpu/sh4/clock-sh7780.c126
-rw-r--r--arch/sh/kernel/time.c518
16 files changed, 1224 insertions, 612 deletions
diff --git a/arch/sh/boards/overdrive/Makefile b/arch/sh/boards/overdrive/Makefile
index 1762b59e9279..245f03baf762 100644
--- a/arch/sh/boards/overdrive/Makefile
+++ b/arch/sh/boards/overdrive/Makefile
@@ -2,7 +2,7 @@
2# Makefile for the STMicroelectronics Overdrive specific parts of the kernel 2# Makefile for the STMicroelectronics Overdrive specific parts of the kernel
3# 3#
4 4
5obj-y := mach.o setup.o io.o irq.o led.o time.o 5obj-y := mach.o setup.o io.o irq.o led.o
6 6
7obj-$(CONFIG_PCI) += fpga.o galileo.o pcidma.o 7obj-$(CONFIG_PCI) += fpga.o galileo.o pcidma.o
8 8
diff --git a/arch/sh/boards/overdrive/setup.c b/arch/sh/boards/overdrive/setup.c
index a36ce0284ed3..94f6165d33b8 100644
--- a/arch/sh/boards/overdrive/setup.c
+++ b/arch/sh/boards/overdrive/setup.c
@@ -17,8 +17,6 @@
17#include <asm/overdrive/overdrive.h> 17#include <asm/overdrive/overdrive.h>
18#include <asm/overdrive/fpga.h> 18#include <asm/overdrive/fpga.h>
19 19
20extern void od_time_init(void);
21
22const char *get_system_type(void) 20const char *get_system_type(void)
23{ 21{
24 return "SH7750 Overdrive"; 22 return "SH7750 Overdrive";
@@ -31,11 +29,9 @@ int __init platform_setup(void)
31{ 29{
32#ifdef CONFIG_PCI 30#ifdef CONFIG_PCI
33 init_overdrive_fpga(); 31 init_overdrive_fpga();
34 galileo_init(); 32 galileo_init();
35#endif 33#endif
36 34
37 board_time_init = od_time_init;
38
39 /* Enable RS232 receive buffers */ 35 /* Enable RS232 receive buffers */
40 writel(0x1e, OVERDRIVE_CTRL); 36 writel(0x1e, OVERDRIVE_CTRL);
41} 37}
diff --git a/arch/sh/boards/overdrive/time.c b/arch/sh/boards/overdrive/time.c
deleted file mode 100644
index 68533690e097..000000000000
--- a/arch/sh/boards/overdrive/time.c
+++ /dev/null
@@ -1,119 +0,0 @@
1/*
2 * arch/sh/boards/overdrive/time.c
3 *
4 * Copyright (C) 2000 Stuart Menefy (stuart.menefy@st.com)
5 * Copyright (C) 2002 Paul Mundt (lethal@chaoticdreams.org)
6 *
7 * May be copied or modified under the terms of the GNU General Public
8 * License. See linux/COPYING for more information.
9 *
10 * STMicroelectronics Overdrive Support.
11 */
12
13void od_time_init(void)
14{
15 struct frqcr_data {
16 unsigned short frqcr;
17 struct {
18 unsigned char multiplier;
19 unsigned char divisor;
20 } factor[3];
21 };
22
23 static struct frqcr_data st40_frqcr_table[] = {
24 { 0x000, {{1,1}, {1,1}, {1,2}}},
25 { 0x002, {{1,1}, {1,1}, {1,4}}},
26 { 0x004, {{1,1}, {1,1}, {1,8}}},
27 { 0x008, {{1,1}, {1,2}, {1,2}}},
28 { 0x00A, {{1,1}, {1,2}, {1,4}}},
29 { 0x00C, {{1,1}, {1,2}, {1,8}}},
30 { 0x011, {{1,1}, {2,3}, {1,6}}},
31 { 0x013, {{1,1}, {2,3}, {1,3}}},
32 { 0x01A, {{1,1}, {1,2}, {1,4}}},
33 { 0x01C, {{1,1}, {1,2}, {1,8}}},
34 { 0x023, {{1,1}, {2,3}, {1,3}}},
35 { 0x02C, {{1,1}, {1,2}, {1,8}}},
36 { 0x048, {{1,2}, {1,2}, {1,4}}},
37 { 0x04A, {{1,2}, {1,2}, {1,6}}},
38 { 0x04C, {{1,2}, {1,2}, {1,8}}},
39 { 0x05A, {{1,2}, {1,3}, {1,6}}},
40 { 0x05C, {{1,2}, {1,3}, {1,6}}},
41 { 0x063, {{1,2}, {1,4}, {1,4}}},
42 { 0x06C, {{1,2}, {1,4}, {1,8}}},
43 { 0x091, {{1,3}, {1,3}, {1,6}}},
44 { 0x093, {{1,3}, {1,3}, {1,6}}},
45 { 0x0A3, {{1,3}, {1,6}, {1,6}}},
46 { 0x0DA, {{1,4}, {1,4}, {1,8}}},
47 { 0x0DC, {{1,4}, {1,4}, {1,8}}},
48 { 0x0EC, {{1,4}, {1,8}, {1,8}}},
49 { 0x123, {{1,4}, {1,4}, {1,8}}},
50 { 0x16C, {{1,4}, {1,8}, {1,8}}},
51 };
52
53 struct memclk_data {
54 unsigned char multiplier;
55 unsigned char divisor;
56 };
57 static struct memclk_data st40_memclk_table[8] = {
58 {1,1}, // 000
59 {1,2}, // 001
60 {1,3}, // 010
61 {2,3}, // 011
62 {1,4}, // 100
63 {1,6}, // 101
64 {1,8}, // 110
65 {1,8} // 111
66 };
67
68 unsigned long pvr;
69
70 /*
71 * This should probably be moved into the SH3 probing code, and then
72 * use the processor structure to determine which CPU we are running
73 * on.
74 */
75 pvr = ctrl_inl(CCN_PVR);
76 printk("PVR %08x\n", pvr);
77
78 if (((pvr >> CCN_PVR_CHIP_SHIFT) & CCN_PVR_CHIP_MASK) == CCN_PVR_CHIP_ST40STB1) {
79 /*
80 * Unfortunatly the STB1 FRQCR values are different from the
81 * 7750 ones.
82 */
83 struct frqcr_data *d;
84 int a;
85 unsigned long memclkcr;
86 struct memclk_data *e;
87
88 for (a=0; a<ARRAY_SIZE(st40_frqcr_table); a++) {
89 d = &st40_frqcr_table[a];
90 if (d->frqcr == (frqcr & 0x1ff))
91 break;
92 }
93 if (a == ARRAY_SIZE(st40_frqcr_table)) {
94 d = st40_frqcr_table;
95 printk("ERROR: Unrecognised FRQCR value, using default multipliers\n");
96 }
97
98 memclkcr = ctrl_inl(CLOCKGEN_MEMCLKCR);
99 e = &st40_memclk_table[memclkcr & MEMCLKCR_RATIO_MASK];
100
101 printk("Clock multipliers: CPU: %d/%d Bus: %d/%d Mem: %d/%d Periph: %d/%d\n",
102 d->factor[0].multiplier, d->factor[0].divisor,
103 d->factor[1].multiplier, d->factor[1].divisor,
104 e->multiplier, e->divisor,
105 d->factor[2].multiplier, d->factor[2].divisor);
106
107 current_cpu_data.master_clock = current_cpu_data.module_clock *
108 d->factor[2].divisor /
109 d->factor[2].multiplier;
110 current_cpu_data.bus_clock = current_cpu_data.master_clock *
111 d->factor[1].multiplier /
112 d->factor[1].divisor;
113 current_cpu_data.memory_clock = current_cpu_data.master_clock *
114 e->multiplier / e->divisor;
115 current_cpu_data.cpu_clock = current_cpu_data.master_clock *
116 d->factor[0].multiplier /
117 d->factor[0].divisor;
118}
119
diff --git a/arch/sh/kernel/cpu/clock.c b/arch/sh/kernel/cpu/clock.c
new file mode 100644
index 000000000000..989e7fdd524d
--- /dev/null
+++ b/arch/sh/kernel/cpu/clock.c
@@ -0,0 +1,287 @@
1/*
2 * arch/sh/kernel/cpu/clock.c - SuperH clock framework
3 *
4 * Copyright (C) 2005 Paul Mundt
5 *
6 * This clock framework is derived from the OMAP version by:
7 *
8 * Copyright (C) 2004 Nokia Corporation
9 * Written by Tuukka Tikkanen <tuukka.tikkanen@elektrobit.com>
10 *
11 * This file is subject to the terms and conditions of the GNU General Public
12 * License. See the file "COPYING" in the main directory of this archive
13 * for more details.
14 */
15#include <linux/kernel.h>
16#include <linux/init.h>
17#include <linux/module.h>
18#include <linux/list.h>
19#include <linux/kref.h>
20#include <linux/seq_file.h>
21#include <linux/err.h>
22#include <asm/clock.h>
23#include <asm/timer.h>
24
25static LIST_HEAD(clock_list);
26static DEFINE_SPINLOCK(clock_lock);
27static DECLARE_MUTEX(clock_list_sem);
28
29/*
30 * Each subtype is expected to define the init routines for these clocks,
31 * as each subtype (or processor family) will have these clocks at the
32 * very least. These are all provided through the CPG, which even some of
33 * the more quirky parts (such as ST40, SH4-202, etc.) still have.
34 *
35 * The processor-specific code is expected to register any additional
36 * clock sources that are of interest.
37 */
38static struct clk master_clk = {
39 .name = "master_clk",
40 .flags = CLK_ALWAYS_ENABLED | CLK_RATE_PROPAGATES,
41#ifdef CONFIG_SH_PCLK_FREQ_BOOL
42 .rate = CONFIG_SH_PCLK_FREQ,
43#endif
44};
45
46static struct clk module_clk = {
47 .name = "module_clk",
48 .parent = &master_clk,
49 .flags = CLK_ALWAYS_ENABLED | CLK_RATE_PROPAGATES,
50};
51
52static struct clk bus_clk = {
53 .name = "bus_clk",
54 .parent = &master_clk,
55 .flags = CLK_ALWAYS_ENABLED | CLK_RATE_PROPAGATES,
56};
57
58static struct clk cpu_clk = {
59 .name = "cpu_clk",
60 .parent = &master_clk,
61 .flags = CLK_ALWAYS_ENABLED,
62};
63
64/*
65 * The ordering of these clocks matters, do not change it.
66 */
67static struct clk *onchip_clocks[] = {
68 &master_clk,
69 &module_clk,
70 &bus_clk,
71 &cpu_clk,
72};
73
74static void propagate_rate(struct clk *clk)
75{
76 struct clk *clkp;
77
78 list_for_each_entry(clkp, &clock_list, node) {
79 if (likely(clkp->parent != clk))
80 continue;
81 if (likely(clkp->ops && clkp->ops->recalc))
82 clkp->ops->recalc(clkp);
83 }
84}
85
86int __clk_enable(struct clk *clk)
87{
88 /*
89 * See if this is the first time we're enabling the clock, some
90 * clocks that are always enabled still require "special"
91 * initialization. This is especially true if the clock mode
92 * changes and the clock needs to hunt for the proper set of
93 * divisors to use before it can effectively recalc.
94 */
95 if (unlikely(atomic_read(&clk->kref.refcount) == 1))
96 if (clk->ops && clk->ops->init)
97 clk->ops->init(clk);
98
99 if (clk->flags & CLK_ALWAYS_ENABLED)
100 return 0;
101
102 if (likely(clk->ops && clk->ops->enable))
103 clk->ops->enable(clk);
104
105 kref_get(&clk->kref);
106 return 0;
107}
108
109int clk_enable(struct clk *clk)
110{
111 unsigned long flags;
112 int ret;
113
114 spin_lock_irqsave(&clock_lock, flags);
115 ret = __clk_enable(clk);
116 spin_unlock_irqrestore(&clock_lock, flags);
117
118 return ret;
119}
120
121static void clk_kref_release(struct kref *kref)
122{
123 /* Nothing to do */
124}
125
126void __clk_disable(struct clk *clk)
127{
128 if (clk->flags & CLK_ALWAYS_ENABLED)
129 return;
130
131 kref_put(&clk->kref, clk_kref_release);
132}
133
134void clk_disable(struct clk *clk)
135{
136 unsigned long flags;
137
138 spin_lock_irqsave(&clock_lock, flags);
139 __clk_disable(clk);
140 spin_unlock_irqrestore(&clock_lock, flags);
141}
142
143int clk_register(struct clk *clk)
144{
145 down(&clock_list_sem);
146
147 list_add(&clk->node, &clock_list);
148 kref_init(&clk->kref);
149
150 up(&clock_list_sem);
151
152 return 0;
153}
154
155void clk_unregister(struct clk *clk)
156{
157 down(&clock_list_sem);
158 list_del(&clk->node);
159 up(&clock_list_sem);
160}
161
162inline unsigned long clk_get_rate(struct clk *clk)
163{
164 return clk->rate;
165}
166
167int clk_set_rate(struct clk *clk, unsigned long rate)
168{
169 int ret = -EOPNOTSUPP;
170
171 if (likely(clk->ops && clk->ops->set_rate)) {
172 unsigned long flags;
173
174 spin_lock_irqsave(&clock_lock, flags);
175 ret = clk->ops->set_rate(clk, rate);
176 spin_unlock_irqrestore(&clock_lock, flags);
177 }
178
179 if (unlikely(clk->flags & CLK_RATE_PROPAGATES))
180 propagate_rate(clk);
181
182 return ret;
183}
184
185void clk_recalc_rate(struct clk *clk)
186{
187 if (likely(clk->ops && clk->ops->recalc)) {
188 unsigned long flags;
189
190 spin_lock_irqsave(&clock_lock, flags);
191 clk->ops->recalc(clk);
192 spin_unlock_irqrestore(&clock_lock, flags);
193 }
194
195 if (unlikely(clk->flags & CLK_RATE_PROPAGATES))
196 propagate_rate(clk);
197}
198
199struct clk *clk_get(const char *id)
200{
201 struct clk *p, *clk = ERR_PTR(-ENOENT);
202
203 down(&clock_list_sem);
204 list_for_each_entry(p, &clock_list, node) {
205 if (strcmp(id, p->name) == 0 && try_module_get(p->owner)) {
206 clk = p;
207 break;
208 }
209 }
210 up(&clock_list_sem);
211
212 return clk;
213}
214
215void clk_put(struct clk *clk)
216{
217 if (clk && !IS_ERR(clk))
218 module_put(clk->owner);
219}
220
221void __init __attribute__ ((weak))
222arch_init_clk_ops(struct clk_ops **ops, int type)
223{
224}
225
226int __init clk_init(void)
227{
228 int i, ret = 0;
229
230 if (unlikely(!master_clk.rate))
231 /*
232 * NOTE: This will break if the default divisor has been
233 * changed.
234 *
235 * No one should be changing the default on us however,
236 * expect that a sane value for CONFIG_SH_PCLK_FREQ will
237 * be defined in the event of a different divisor.
238 */
239 master_clk.rate = get_timer_frequency() * 4;
240
241 for (i = 0; i < ARRAY_SIZE(onchip_clocks); i++) {
242 struct clk *clk = onchip_clocks[i];
243
244 arch_init_clk_ops(&clk->ops, i);
245 ret |= clk_register(clk);
246 clk_enable(clk);
247 }
248
249 /* Kick the child clocks.. */
250 propagate_rate(&master_clk);
251 propagate_rate(&bus_clk);
252
253 return ret;
254}
255
256int show_clocks(struct seq_file *m)
257{
258 struct clk *clk;
259
260 list_for_each_entry_reverse(clk, &clock_list, node) {
261 unsigned long rate = clk_get_rate(clk);
262
263 /*
264 * Don't bother listing dummy clocks with no ancestry
265 * that only support enable and disable ops.
266 */
267 if (unlikely(!rate && !clk->parent))
268 continue;
269
270 seq_printf(m, "%-12s\t: %ld.%02ldMHz\n", clk->name,
271 rate / 1000000, (rate % 1000000) / 10000);
272 }
273
274 return 0;
275}
276
277EXPORT_SYMBOL_GPL(clk_register);
278EXPORT_SYMBOL_GPL(clk_unregister);
279EXPORT_SYMBOL_GPL(clk_get);
280EXPORT_SYMBOL_GPL(clk_put);
281EXPORT_SYMBOL_GPL(clk_enable);
282EXPORT_SYMBOL_GPL(clk_disable);
283EXPORT_SYMBOL_GPL(__clk_enable);
284EXPORT_SYMBOL_GPL(__clk_disable);
285EXPORT_SYMBOL_GPL(clk_get_rate);
286EXPORT_SYMBOL_GPL(clk_set_rate);
287EXPORT_SYMBOL_GPL(clk_recalc_rate);
diff --git a/arch/sh/kernel/cpu/sh3/Makefile b/arch/sh/kernel/cpu/sh3/Makefile
index a64532e4dc63..b54dbb9a0c86 100644
--- a/arch/sh/kernel/cpu/sh3/Makefile
+++ b/arch/sh/kernel/cpu/sh3/Makefile
@@ -4,3 +4,10 @@
4 4
5obj-y := ex.o probe.o 5obj-y := ex.o probe.o
6 6
7clock-$(CONFIG_CPU_SH3) := clock-sh3.o
8clock-$(CONFIG_CPU_SUBTYPE_SH7300) := clock-sh7300.o
9clock-$(CONFIG_CPU_SUBTYPE_SH7705) := clock-sh7705.o
10clock-$(CONFIG_CPU_SUBTYPE_SH7709) := clock-sh7709.o
11
12obj-y += $(clock-y)
13
diff --git a/arch/sh/kernel/cpu/sh3/clock-sh3.c b/arch/sh/kernel/cpu/sh3/clock-sh3.c
new file mode 100644
index 000000000000..c3c945958baf
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh3/clock-sh3.c
@@ -0,0 +1,89 @@
1/*
2 * arch/sh/kernel/cpu/sh3/clock-sh3.c
3 *
4 * Generic SH-3 support for the clock framework
5 *
6 * Copyright (C) 2005 Paul Mundt
7 *
8 * FRQCR parsing hacked out of arch/sh/kernel/time.c
9 *
10 * Copyright (C) 1999 Tetsuya Okada & Niibe Yutaka
11 * Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
12 * Copyright (C) 2002, 2003, 2004 Paul Mundt
13 * Copyright (C) 2002 M. R. Brown <mrbrown@linux-sh.org>
14 *
15 * This file is subject to the terms and conditions of the GNU General Public
16 * License. See the file "COPYING" in the main directory of this archive
17 * for more details.
18 */
19#include <linux/init.h>
20#include <linux/kernel.h>
21#include <asm/clock.h>
22#include <asm/freq.h>
23#include <asm/io.h>
24
25static int stc_multipliers[] = { 1, 2, 3, 4, 6, 1, 1, 1 };
26static int ifc_divisors[] = { 1, 2, 3, 4, 1, 1, 1, 1 };
27static int pfc_divisors[] = { 1, 2, 3, 4, 6, 1, 1, 1 };
28
29static void master_clk_init(struct clk *clk)
30{
31 int frqcr = ctrl_inw(FRQCR);
32 int idx = ((frqcr & 0x2000) >> 11) | (frqcr & 0x0003);
33
34 clk->rate *= pfc_divisors[idx];
35}
36
37static struct clk_ops sh3_master_clk_ops = {
38 .init = master_clk_init,
39};
40
41static void module_clk_recalc(struct clk *clk)
42{
43 int frqcr = ctrl_inw(FRQCR);
44 int idx = ((frqcr & 0x2000) >> 11) | (frqcr & 0x0003);
45
46 clk->rate = clk->parent->rate / pfc_divisors[idx];
47}
48
49static struct clk_ops sh3_module_clk_ops = {
50 .recalc = module_clk_recalc,
51};
52
53static void bus_clk_recalc(struct clk *clk)
54{
55 int frqcr = ctrl_inw(FRQCR);
56 int idx = ((frqcr & 0x8000) >> 13) | ((frqcr & 0x0030) >> 4);
57
58 clk->rate = clk->parent->rate / stc_multipliers[idx];
59}
60
61static struct clk_ops sh3_bus_clk_ops = {
62 .recalc = bus_clk_recalc,
63};
64
65static void cpu_clk_recalc(struct clk *clk)
66{
67 int frqcr = ctrl_inw(FRQCR);
68 int idx = ((frqcr & 0x4000) >> 12) | ((frqcr & 0x000c) >> 2);
69
70 clk->rate = clk->parent->rate / ifc_divisors[idx];
71}
72
73static struct clk_ops sh3_cpu_clk_ops = {
74 .recalc = cpu_clk_recalc,
75};
76
77static struct clk_ops *sh3_clk_ops[] = {
78 &sh3_master_clk_ops,
79 &sh3_module_clk_ops,
80 &sh3_bus_clk_ops,
81 &sh3_cpu_clk_ops,
82};
83
84void __init arch_init_clk_ops(struct clk_ops **ops, int idx)
85{
86 if (idx < ARRAY_SIZE(sh3_clk_ops))
87 *ops = sh3_clk_ops[idx];
88}
89
diff --git a/arch/sh/kernel/cpu/sh3/clock-sh7300.c b/arch/sh/kernel/cpu/sh3/clock-sh7300.c
new file mode 100644
index 000000000000..e804174b9625
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh3/clock-sh7300.c
@@ -0,0 +1,78 @@
1/*
2 * arch/sh/kernel/cpu/sh3/clock-sh7300.c
3 *
4 * SH7300 support for the clock framework
5 *
6 * Copyright (C) 2005 Paul Mundt
7 *
8 * FRQCR parsing hacked out of arch/sh/kernel/time.c
9 *
10 * Copyright (C) 1999 Tetsuya Okada & Niibe Yutaka
11 * Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
12 * Copyright (C) 2002, 2003, 2004 Paul Mundt
13 * Copyright (C) 2002 M. R. Brown <mrbrown@linux-sh.org>
14 *
15 * This file is subject to the terms and conditions of the GNU General Public
16 * License. See the file "COPYING" in the main directory of this archive
17 * for more details.
18 */
19#include <linux/init.h>
20#include <linux/kernel.h>
21#include <asm/clock.h>
22#include <asm/freq.h>
23#include <asm/io.h>
24
25static int md_table[] = { 1, 2, 3, 4, 6, 8, 12 };
26
27static void master_clk_init(struct clk *clk)
28{
29 clk->rate *= md_table[ctrl_inw(FRQCR) & 0x0007];
30}
31
32static struct clk_ops sh7300_master_clk_ops = {
33 .init = master_clk_init,
34};
35
36static void module_clk_recalc(struct clk *clk)
37{
38 int idx = (ctrl_inw(FRQCR) & 0x0007);
39 clk->rate = clk->parent->rate / md_table[idx];
40}
41
42static struct clk_ops sh7300_module_clk_ops = {
43 .recalc = module_clk_recalc,
44};
45
46static void bus_clk_recalc(struct clk *clk)
47{
48 int idx = (ctrl_inw(FRQCR) & 0x0700) >> 8;
49 clk->rate = clk->parent->rate / md_table[idx];
50}
51
52static struct clk_ops sh7300_bus_clk_ops = {
53 .recalc = bus_clk_recalc,
54};
55
56static void cpu_clk_recalc(struct clk *clk)
57{
58 int idx = (ctrl_inw(FRQCR) & 0x0070) >> 4;
59 clk->rate = clk->parent->rate / md_table[idx];
60}
61
62static struct clk_ops sh7300_cpu_clk_ops = {
63 .recalc = cpu_clk_recalc,
64};
65
66static struct clk_ops *sh7300_clk_ops[] = {
67 &sh7300_master_clk_ops,
68 &sh7300_module_clk_ops,
69 &sh7300_bus_clk_ops,
70 &sh7300_cpu_clk_ops,
71};
72
73void __init arch_init_clk_ops(struct clk_ops **ops, int idx)
74{
75 if (idx < ARRAY_SIZE(sh7300_clk_ops))
76 *ops = sh7300_clk_ops[idx];
77}
78
diff --git a/arch/sh/kernel/cpu/sh3/clock-sh7705.c b/arch/sh/kernel/cpu/sh3/clock-sh7705.c
new file mode 100644
index 000000000000..dfdbf3277fd7
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh3/clock-sh7705.c
@@ -0,0 +1,84 @@
1/*
2 * arch/sh/kernel/cpu/sh3/clock-sh7705.c
3 *
4 * SH7705 support for the clock framework
5 *
6 * Copyright (C) 2005 Paul Mundt
7 *
8 * FRQCR parsing hacked out of arch/sh/kernel/time.c
9 *
10 * Copyright (C) 1999 Tetsuya Okada & Niibe Yutaka
11 * Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
12 * Copyright (C) 2002, 2003, 2004 Paul Mundt
13 * Copyright (C) 2002 M. R. Brown <mrbrown@linux-sh.org>
14 *
15 * This file is subject to the terms and conditions of the GNU General Public
16 * License. See the file "COPYING" in the main directory of this archive
17 * for more details.
18 */
19#include <linux/init.h>
20#include <linux/kernel.h>
21#include <asm/clock.h>
22#include <asm/freq.h>
23#include <asm/io.h>
24
25/*
26 * SH7705 uses the same divisors as the generic SH-3 case, it's just the
27 * FRQCR layout that is a bit different..
28 */
29static int stc_multipliers[] = { 1, 2, 3, 4, 6, 1, 1, 1 };
30static int ifc_divisors[] = { 1, 2, 3, 4, 1, 1, 1, 1 };
31static int pfc_divisors[] = { 1, 2, 3, 4, 6, 1, 1, 1 };
32
33static void master_clk_init(struct clk *clk)
34{
35 clk->rate *= pfc_divisors[ctrl_inw(FRQCR) & 0x0003];
36}
37
38static struct clk_ops sh7705_master_clk_ops = {
39 .init = master_clk_init,
40};
41
42static void module_clk_recalc(struct clk *clk)
43{
44 int idx = ctrl_inw(FRQCR) & 0x0003;
45 clk->rate = clk->parent->rate / pfc_divisors[idx];
46}
47
48static struct clk_ops sh7705_module_clk_ops = {
49 .recalc = module_clk_recalc,
50};
51
52static void bus_clk_recalc(struct clk *clk)
53{
54 int idx = (ctrl_inw(FRQCR) & 0x0300) >> 8;
55 clk->rate = clk->parent->rate / stc_multipliers[idx];
56}
57
58static struct clk_ops sh7705_bus_clk_ops = {
59 .recalc = bus_clk_recalc,
60};
61
62static void cpu_clk_recalc(struct clk *clk)
63{
64 int idx = (ctrl_inw(FRQCR) & 0x0030) >> 4;
65 clk->rate = clk->parent->rate / ifc_divisors[idx];
66}
67
68static struct clk_ops sh7705_cpu_clk_ops = {
69 .recalc = cpu_clk_recalc,
70};
71
72static struct clk_ops *sh7705_clk_ops[] = {
73 &sh7705_master_clk_ops,
74 &sh7705_module_clk_ops,
75 &sh7705_bus_clk_ops,
76 &sh7705_cpu_clk_ops,
77};
78
79void __init arch_init_clk_ops(struct clk_ops **ops, int idx)
80{
81 if (idx < ARRAY_SIZE(sh7705_clk_ops))
82 *ops = sh7705_clk_ops[idx];
83}
84
diff --git a/arch/sh/kernel/cpu/sh3/clock-sh7709.c b/arch/sh/kernel/cpu/sh3/clock-sh7709.c
new file mode 100644
index 000000000000..10461a745e5f
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh3/clock-sh7709.c
@@ -0,0 +1,96 @@
1/*
2 * arch/sh/kernel/cpu/sh3/clock-sh7709.c
3 *
4 * SH7709 support for the clock framework
5 *
6 * Copyright (C) 2005 Andriy Skulysh
7 *
8 * Based on arch/sh/kernel/cpu/sh3/clock-sh7705.c
9 * Copyright (C) 2005 Paul Mundt
10 *
11 * This file is subject to the terms and conditions of the GNU General Public
12 * License. See the file "COPYING" in the main directory of this archive
13 * for more details.
14 */
15#include <linux/init.h>
16#include <linux/kernel.h>
17#include <asm/clock.h>
18#include <asm/freq.h>
19#include <asm/io.h>
20
21static int stc_multipliers[] = { 1, 2, 4, 8, 3, 6, 1, 1 };
22static int ifc_divisors[] = { 1, 2, 4, 1, 3, 1, 1, 1 };
23static int pfc_divisors[] = { 1, 2, 4, 1, 3, 6, 1, 1 };
24
25static void set_bus_parent(struct clk *clk)
26{
27 struct clk *bus_clk = clk_get("bus_clk");
28 clk->parent = bus_clk;
29 clk_put(bus_clk);
30}
31
32static void master_clk_init(struct clk *clk)
33{
34 int frqcr = ctrl_inw(FRQCR);
35 int idx = ((frqcr & 0x2000) >> 11) | (frqcr & 0x0003);
36
37 clk->rate *= pfc_divisors[idx];
38}
39
40static struct clk_ops sh7709_master_clk_ops = {
41 .init = master_clk_init,
42};
43
44static void module_clk_recalc(struct clk *clk)
45{
46 int frqcr = ctrl_inw(FRQCR);
47 int idx = ((frqcr & 0x2000) >> 11) | (frqcr & 0x0003);
48
49 clk->rate = clk->parent->rate / pfc_divisors[idx];
50}
51
52static struct clk_ops sh7709_module_clk_ops = {
53#ifdef CLOCK_MODE_0_1_2_7
54 .init = set_bus_parent,
55#endif
56 .recalc = module_clk_recalc,
57};
58
59static void bus_clk_recalc(struct clk *clk)
60{
61 int frqcr = ctrl_inw(FRQCR);
62 int idx = (frqcr & 0x0080) ?
63 ((frqcr & 0x8000) >> 13) | ((frqcr & 0x0030) >> 4) : 1;
64
65 clk->rate = clk->parent->rate * stc_multipliers[idx];
66}
67
68static struct clk_ops sh7709_bus_clk_ops = {
69 .recalc = bus_clk_recalc,
70};
71
72static void cpu_clk_recalc(struct clk *clk)
73{
74 int frqcr = ctrl_inw(FRQCR);
75 int idx = ((frqcr & 0x4000) >> 12) | ((frqcr & 0x000c) >> 2);
76
77 clk->rate = clk->parent->rate / ifc_divisors[idx];
78}
79
80static struct clk_ops sh7709_cpu_clk_ops = {
81 .init = set_bus_parent,
82 .recalc = cpu_clk_recalc,
83};
84
85static struct clk_ops *sh7709_clk_ops[] = {
86 &sh7709_master_clk_ops,
87 &sh7709_module_clk_ops,
88 &sh7709_bus_clk_ops,
89 &sh7709_cpu_clk_ops,
90};
91
92void __init arch_init_clk_ops(struct clk_ops **ops, int idx)
93{
94 if (idx < ARRAY_SIZE(sh7709_clk_ops))
95 *ops = sh7709_clk_ops[idx];
96}
diff --git a/arch/sh/kernel/cpu/sh4/Makefile b/arch/sh/kernel/cpu/sh4/Makefile
index ead1071eac73..3d5cafc71ae3 100644
--- a/arch/sh/kernel/cpu/sh4/Makefile
+++ b/arch/sh/kernel/cpu/sh4/Makefile
@@ -5,6 +5,15 @@
5obj-y := ex.o probe.o 5obj-y := ex.o probe.o
6 6
7obj-$(CONFIG_SH_FPU) += fpu.o 7obj-$(CONFIG_SH_FPU) += fpu.o
8obj-$(CONFIG_CPU_SUBTYPE_ST40STB1) += irq_intc2.o
9obj-$(CONFIG_SH_STORE_QUEUES) += sq.o 8obj-$(CONFIG_SH_STORE_QUEUES) += sq.o
10 9
10# Primary on-chip clocks (common)
11clock-$(CONFIG_CPU_SH4) := clock-sh4.o
12clock-$(CONFIG_CPU_SUBTYPE_SH73180) := clock-sh73180.o
13clock-$(CONFIG_CPU_SUBTYPE_SH7770) := clock-sh7770.o
14clock-$(CONFIG_CPU_SUBTYPE_SH7780) := clock-sh7780.o
15
16# Additional clocks by subtype
17clock-$(CONFIG_CPU_SUBTYPE_SH4_202) += clock-sh4-202.o
18
19obj-y += $(clock-y)
diff --git a/arch/sh/kernel/cpu/sh4/clock-sh4-202.c b/arch/sh/kernel/cpu/sh4/clock-sh4-202.c
new file mode 100644
index 000000000000..bfdf5fe8d948
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh4/clock-sh4-202.c
@@ -0,0 +1,179 @@
1/*
2 * arch/sh/kernel/cpu/sh4/clock-sh4-202.c
3 *
4 * Additional SH4-202 support for the clock framework
5 *
6 * Copyright (C) 2005 Paul Mundt
7 *
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file "COPYING" in the main directory of this archive
10 * for more details.
11 */
12#include <linux/init.h>
13#include <linux/kernel.h>
14#include <linux/err.h>
15#include <asm/clock.h>
16#include <asm/freq.h>
17#include <asm/io.h>
18
19#define CPG2_FRQCR3 0xfe0a0018
20
21static int frqcr3_divisors[] = { 1, 2, 3, 4, 6, 8, 16 };
22static int frqcr3_values[] = { 0, 1, 2, 3, 4, 5, 6 };
23
24static void emi_clk_recalc(struct clk *clk)
25{
26 int idx = ctrl_inl(CPG2_FRQCR3) & 0x0007;
27 clk->rate = clk->parent->rate / frqcr3_divisors[idx];
28}
29
30static inline int frqcr3_lookup(struct clk *clk, unsigned long rate)
31{
32 int divisor = clk->parent->rate / rate;
33 int i;
34
35 for (i = 0; i < ARRAY_SIZE(frqcr3_divisors); i++)
36 if (frqcr3_divisors[i] == divisor)
37 return frqcr3_values[i];
38
39 /* Safe fallback */
40 return 5;
41}
42
43static struct clk_ops sh4202_emi_clk_ops = {
44 .recalc = emi_clk_recalc,
45};
46
47static struct clk sh4202_emi_clk = {
48 .name = "emi_clk",
49 .flags = CLK_ALWAYS_ENABLED,
50 .ops = &sh4202_emi_clk_ops,
51};
52
53static void femi_clk_recalc(struct clk *clk)
54{
55 int idx = (ctrl_inl(CPG2_FRQCR3) >> 3) & 0x0007;
56 clk->rate = clk->parent->rate / frqcr3_divisors[idx];
57}
58
59static struct clk_ops sh4202_femi_clk_ops = {
60 .recalc = femi_clk_recalc,
61};
62
63static struct clk sh4202_femi_clk = {
64 .name = "femi_clk",
65 .flags = CLK_ALWAYS_ENABLED,
66 .ops = &sh4202_femi_clk_ops,
67};
68
69static void shoc_clk_init(struct clk *clk)
70{
71 int i;
72
73 /*
74 * For some reason, the shoc_clk seems to be set to some really
75 * insane value at boot (values outside of the allowable frequency
76 * range for instance). We deal with this by scaling it back down
77 * to something sensible just in case.
78 *
79 * Start scaling from the high end down until we find something
80 * that passes rate verification..
81 */
82 for (i = 0; i < ARRAY_SIZE(frqcr3_divisors); i++) {
83 int divisor = frqcr3_divisors[i];
84
85 if (clk->ops->set_rate(clk, clk->parent->rate / divisor) == 0)
86 break;
87 }
88
89 WARN_ON(i == ARRAY_SIZE(frqcr3_divisors)); /* Undefined clock */
90}
91
92static void shoc_clk_recalc(struct clk *clk)
93{
94 int idx = (ctrl_inl(CPG2_FRQCR3) >> 6) & 0x0007;
95 clk->rate = clk->parent->rate / frqcr3_divisors[idx];
96}
97
98static int shoc_clk_verify_rate(struct clk *clk, unsigned long rate)
99{
100 struct clk *bclk = clk_get("bus_clk");
101 unsigned long bclk_rate = clk_get_rate(bclk);
102
103 clk_put(bclk);
104
105 if (rate > bclk_rate)
106 return 1;
107 if (rate > 66000000)
108 return 1;
109
110 return 0;
111}
112
113static int shoc_clk_set_rate(struct clk *clk, unsigned long rate)
114{
115 unsigned long frqcr3;
116 unsigned int tmp;
117
118 /* Make sure we have something sensible to switch to */
119 if (shoc_clk_verify_rate(clk, rate) != 0)
120 return -EINVAL;
121
122 tmp = frqcr3_lookup(clk, rate);
123
124 frqcr3 = ctrl_inl(CPG2_FRQCR3);
125 frqcr3 &= ~(0x0007 << 6);
126 frqcr3 |= tmp << 6;
127 ctrl_outl(frqcr3, CPG2_FRQCR3);
128
129 clk->rate = clk->parent->rate / frqcr3_divisors[tmp];
130
131 return 0;
132}
133
134static struct clk_ops sh4202_shoc_clk_ops = {
135 .init = shoc_clk_init,
136 .recalc = shoc_clk_recalc,
137 .set_rate = shoc_clk_set_rate,
138};
139
140static struct clk sh4202_shoc_clk = {
141 .name = "shoc_clk",
142 .flags = CLK_ALWAYS_ENABLED,
143 .ops = &sh4202_shoc_clk_ops,
144};
145
146static struct clk *sh4202_onchip_clocks[] = {
147 &sh4202_emi_clk,
148 &sh4202_femi_clk,
149 &sh4202_shoc_clk,
150};
151
152static int __init sh4202_clk_init(void)
153{
154 struct clk *clk = clk_get("master_clk");
155 int i;
156
157 for (i = 0; i < ARRAY_SIZE(sh4202_onchip_clocks); i++) {
158 struct clk *clkp = sh4202_onchip_clocks[i];
159
160 clkp->parent = clk;
161 clk_register(clkp);
162 clk_enable(clkp);
163 }
164
165 /*
166 * Now that we have the rest of the clocks registered, we need to
167 * force the parent clock to propagate so that these clocks will
168 * automatically figure out their rate. We cheat by handing the
169 * parent clock its current rate and forcing child propagation.
170 */
171 clk_set_rate(clk, clk_get_rate(clk));
172
173 clk_put(clk);
174
175 return 0;
176}
177
178arch_initcall(sh4202_clk_init);
179
diff --git a/arch/sh/kernel/cpu/sh4/clock-sh4.c b/arch/sh/kernel/cpu/sh4/clock-sh4.c
new file mode 100644
index 000000000000..dca9f87a12d6
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh4/clock-sh4.c
@@ -0,0 +1,80 @@
1/*
2 * arch/sh/kernel/cpu/sh4/clock-sh4.c
3 *
4 * Generic SH-4 support for the clock framework
5 *
6 * Copyright (C) 2005 Paul Mundt
7 *
8 * FRQCR parsing hacked out of arch/sh/kernel/time.c
9 *
10 * Copyright (C) 1999 Tetsuya Okada & Niibe Yutaka
11 * Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
12 * Copyright (C) 2002, 2003, 2004 Paul Mundt
13 * Copyright (C) 2002 M. R. Brown <mrbrown@linux-sh.org>
14 *
15 * This file is subject to the terms and conditions of the GNU General Public
16 * License. See the file "COPYING" in the main directory of this archive
17 * for more details.
18 */
19#include <linux/init.h>
20#include <linux/kernel.h>
21#include <asm/clock.h>
22#include <asm/freq.h>
23#include <asm/io.h>
24
25static int ifc_divisors[] = { 1, 2, 3, 4, 6, 8, 1, 1 };
26#define bfc_divisors ifc_divisors /* Same */
27static int pfc_divisors[] = { 2, 3, 4, 6, 8, 2, 2, 2 };
28
29static void master_clk_init(struct clk *clk)
30{
31 clk->rate *= pfc_divisors[ctrl_inw(FRQCR) & 0x0007];
32}
33
34static struct clk_ops sh4_master_clk_ops = {
35 .init = master_clk_init,
36};
37
38static void module_clk_recalc(struct clk *clk)
39{
40 int idx = (ctrl_inw(FRQCR) & 0x0007);
41 clk->rate = clk->parent->rate / pfc_divisors[idx];
42}
43
44static struct clk_ops sh4_module_clk_ops = {
45 .recalc = module_clk_recalc,
46};
47
48static void bus_clk_recalc(struct clk *clk)
49{
50 int idx = (ctrl_inw(FRQCR) >> 3) & 0x0007;
51 clk->rate = clk->parent->rate / bfc_divisors[idx];
52}
53
54static struct clk_ops sh4_bus_clk_ops = {
55 .recalc = bus_clk_recalc,
56};
57
58static void cpu_clk_recalc(struct clk *clk)
59{
60 int idx = (ctrl_inw(FRQCR) >> 6) & 0x0007;
61 clk->rate = clk->parent->rate / ifc_divisors[idx];
62}
63
64static struct clk_ops sh4_cpu_clk_ops = {
65 .recalc = cpu_clk_recalc,
66};
67
68static struct clk_ops *sh4_clk_ops[] = {
69 &sh4_master_clk_ops,
70 &sh4_module_clk_ops,
71 &sh4_bus_clk_ops,
72 &sh4_cpu_clk_ops,
73};
74
75void __init arch_init_clk_ops(struct clk_ops **ops, int idx)
76{
77 if (idx < ARRAY_SIZE(sh4_clk_ops))
78 *ops = sh4_clk_ops[idx];
79}
80
diff --git a/arch/sh/kernel/cpu/sh4/clock-sh73180.c b/arch/sh/kernel/cpu/sh4/clock-sh73180.c
new file mode 100644
index 000000000000..2fa5cb2ae68d
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh4/clock-sh73180.c
@@ -0,0 +1,81 @@
1/*
2 * arch/sh/kernel/cpu/sh4/clock-sh73180.c
3 *
4 * SH73180 support for the clock framework
5 *
6 * Copyright (C) 2005 Paul Mundt
7 *
8 * FRQCR parsing hacked out of arch/sh/kernel/time.c
9 *
10 * Copyright (C) 1999 Tetsuya Okada & Niibe Yutaka
11 * Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
12 * Copyright (C) 2002, 2003, 2004 Paul Mundt
13 * Copyright (C) 2002 M. R. Brown <mrbrown@linux-sh.org>
14 *
15 * This file is subject to the terms and conditions of the GNU General Public
16 * License. See the file "COPYING" in the main directory of this archive
17 * for more details.
18 */
19#include <linux/init.h>
20#include <linux/kernel.h>
21#include <asm/clock.h>
22#include <asm/freq.h>
23#include <asm/io.h>
24
25/*
26 * SH73180 uses a common set of divisors, so this is quite simple..
27 */
28static int divisors[] = { 1, 2, 3, 4, 6, 8, 12, 16 };
29
30static void master_clk_init(struct clk *clk)
31{
32 clk->rate *= divisors[ctrl_inl(FRQCR) & 0x0007];
33}
34
35static struct clk_ops sh73180_master_clk_ops = {
36 .init = master_clk_init,
37};
38
39static void module_clk_recalc(struct clk *clk)
40{
41 int idx = (ctrl_inl(FRQCR) & 0x0007);
42 clk->rate = clk->parent->rate / divisors[idx];
43}
44
45static struct clk_ops sh73180_module_clk_ops = {
46 .recalc = module_clk_recalc,
47};
48
49static void bus_clk_recalc(struct clk *clk)
50{
51 int idx = (ctrl_inl(FRQCR) >> 12) & 0x0007;
52 clk->rate = clk->parent->rate / divisors[idx];
53}
54
55static struct clk_ops sh73180_bus_clk_ops = {
56 .recalc = bus_clk_recalc,
57};
58
59static void cpu_clk_recalc(struct clk *clk)
60{
61 int idx = (ctrl_inl(FRQCR) >> 20) & 0x0007;
62 clk->rate = clk->parent->rate / divisors[idx];
63}
64
65static struct clk_ops sh73180_cpu_clk_ops = {
66 .recalc = cpu_clk_recalc,
67};
68
69static struct clk_ops *sh73180_clk_ops[] = {
70 &sh73180_master_clk_ops,
71 &sh73180_module_clk_ops,
72 &sh73180_bus_clk_ops,
73 &sh73180_cpu_clk_ops,
74};
75
76void __init arch_init_clk_ops(struct clk_ops **ops, int idx)
77{
78 if (idx < ARRAY_SIZE(sh73180_clk_ops))
79 *ops = sh73180_clk_ops[idx];
80}
81
diff --git a/arch/sh/kernel/cpu/sh4/clock-sh7770.c b/arch/sh/kernel/cpu/sh4/clock-sh7770.c
new file mode 100644
index 000000000000..c8694bac6477
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh4/clock-sh7770.c
@@ -0,0 +1,73 @@
1/*
2 * arch/sh/kernel/cpu/sh4/clock-sh7770.c
3 *
4 * SH7770 support for the clock framework
5 *
6 * Copyright (C) 2005 Paul Mundt
7 *
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file "COPYING" in the main directory of this archive
10 * for more details.
11 */
12#include <linux/init.h>
13#include <linux/kernel.h>
14#include <asm/clock.h>
15#include <asm/freq.h>
16#include <asm/io.h>
17
18static int ifc_divisors[] = { 1, 1, 1, 1, 1, 1, 1, 1 };
19static int bfc_divisors[] = { 1, 1, 1, 1, 1, 8,12, 1 };
20static int pfc_divisors[] = { 1, 8, 1,10,12,16, 1, 1 };
21
22static void master_clk_init(struct clk *clk)
23{
24 clk->rate *= pfc_divisors[(ctrl_inl(FRQCR) >> 28) & 0x000f];
25}
26
27static struct clk_ops sh7770_master_clk_ops = {
28 .init = master_clk_init,
29};
30
31static void module_clk_recalc(struct clk *clk)
32{
33 int idx = ((ctrl_inl(FRQCR) >> 28) & 0x000f);
34 clk->rate = clk->parent->rate / pfc_divisors[idx];
35}
36
37static struct clk_ops sh7770_module_clk_ops = {
38 .recalc = module_clk_recalc,
39};
40
41static void bus_clk_recalc(struct clk *clk)
42{
43 int idx = (ctrl_inl(FRQCR) & 0x000f);
44 clk->rate = clk->parent->rate / bfc_divisors[idx];
45}
46
47static struct clk_ops sh7770_bus_clk_ops = {
48 .recalc = bus_clk_recalc,
49};
50
51static void cpu_clk_recalc(struct clk *clk)
52{
53 int idx = ((ctrl_inl(FRQCR) >> 24) & 0x000f);
54 clk->rate = clk->parent->rate / ifc_divisors[idx];
55}
56
57static struct clk_ops sh7770_cpu_clk_ops = {
58 .recalc = cpu_clk_recalc,
59};
60
61static struct clk_ops *sh7770_clk_ops[] = {
62 &sh7770_master_clk_ops,
63 &sh7770_module_clk_ops,
64 &sh7770_bus_clk_ops,
65 &sh7770_cpu_clk_ops,
66};
67
68void __init arch_init_clk_ops(struct clk_ops **ops, int idx)
69{
70 if (idx < ARRAY_SIZE(sh7770_clk_ops))
71 *ops = sh7770_clk_ops[idx];
72}
73
diff --git a/arch/sh/kernel/cpu/sh4/clock-sh7780.c b/arch/sh/kernel/cpu/sh4/clock-sh7780.c
new file mode 100644
index 000000000000..93ad367342c9
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh4/clock-sh7780.c
@@ -0,0 +1,126 @@
1/*
2 * arch/sh/kernel/cpu/sh4/clock-sh7780.c
3 *
4 * SH7780 support for the clock framework
5 *
6 * Copyright (C) 2005 Paul Mundt
7 *
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file "COPYING" in the main directory of this archive
10 * for more details.
11 */
12#include <linux/init.h>
13#include <linux/kernel.h>
14#include <asm/clock.h>
15#include <asm/freq.h>
16#include <asm/io.h>
17
18static int ifc_divisors[] = { 2, 4 };
19static int bfc_divisors[] = { 1, 1, 1, 8, 12, 16, 24, 1 };
20static int pfc_divisors[] = { 1, 24, 24, 1 };
21static int cfc_divisors[] = { 1, 1, 4, 1, 6, 1, 1, 1 };
22
23static void master_clk_init(struct clk *clk)
24{
25 clk->rate *= pfc_divisors[ctrl_inl(FRQCR) & 0x0003];
26}
27
28static struct clk_ops sh7780_master_clk_ops = {
29 .init = master_clk_init,
30};
31
32static void module_clk_recalc(struct clk *clk)
33{
34 int idx = (ctrl_inl(FRQCR) & 0x0003);
35 clk->rate = clk->parent->rate / pfc_divisors[idx];
36}
37
38static struct clk_ops sh7780_module_clk_ops = {
39 .recalc = module_clk_recalc,
40};
41
42static void bus_clk_recalc(struct clk *clk)
43{
44 int idx = ((ctrl_inl(FRQCR) >> 16) & 0x0007);
45 clk->rate = clk->parent->rate / bfc_divisors[idx];
46}
47
48static struct clk_ops sh7780_bus_clk_ops = {
49 .recalc = bus_clk_recalc,
50};
51
52static void cpu_clk_recalc(struct clk *clk)
53{
54 int idx = ((ctrl_inl(FRQCR) >> 24) & 0x0001);
55 clk->rate = clk->parent->rate / ifc_divisors[idx];
56}
57
58static struct clk_ops sh7780_cpu_clk_ops = {
59 .recalc = cpu_clk_recalc,
60};
61
62static struct clk_ops *sh7780_clk_ops[] = {
63 &sh7780_master_clk_ops,
64 &sh7780_module_clk_ops,
65 &sh7780_bus_clk_ops,
66 &sh7780_cpu_clk_ops,
67};
68
69void __init arch_init_clk_ops(struct clk_ops **ops, int idx)
70{
71 if (idx < ARRAY_SIZE(sh7780_clk_ops))
72 *ops = sh7780_clk_ops[idx];
73}
74
75static void shyway_clk_recalc(struct clk *clk)
76{
77 int idx = ((ctrl_inl(FRQCR) >> 20) & 0x0007);
78 clk->rate = clk->parent->rate / cfc_divisors[idx];
79}
80
81static struct clk_ops sh7780_shyway_clk_ops = {
82 .recalc = shyway_clk_recalc,
83};
84
85static struct clk sh7780_shyway_clk = {
86 .name = "shyway_clk",
87 .flags = CLK_ALWAYS_ENABLED,
88 .ops = &sh7780_shyway_clk_ops,
89};
90
91/*
92 * Additional SH7780-specific on-chip clocks that aren't already part of the
93 * clock framework
94 */
95static struct clk *sh7780_onchip_clocks[] = {
96 &sh7780_shyway_clk,
97};
98
99static int __init sh7780_clk_init(void)
100{
101 struct clk *clk = clk_get("master_clk");
102 int i;
103
104 for (i = 0; i < ARRAY_SIZE(sh7780_onchip_clocks); i++) {
105 struct clk *clkp = sh7780_onchip_clocks[i];
106
107 clkp->parent = clk;
108 clk_register(clkp);
109 clk_enable(clkp);
110 }
111
112 /*
113 * Now that we have the rest of the clocks registered, we need to
114 * force the parent clock to propagate so that these clocks will
115 * automatically figure out their rate. We cheat by handing the
116 * parent clock its current rate and forcing child propagation.
117 */
118 clk_set_rate(clk, clk_get_rate(clk));
119
120 clk_put(clk);
121
122 return 0;
123}
124
125arch_initcall(sh7780_clk_init);
126
diff --git a/arch/sh/kernel/time.c b/arch/sh/kernel/time.c
index 671b876416bf..314a275c04e0 100644
--- a/arch/sh/kernel/time.c
+++ b/arch/sh/kernel/time.c
@@ -3,7 +3,7 @@
3 * 3 *
4 * Copyright (C) 1999 Tetsuya Okada & Niibe Yutaka 4 * Copyright (C) 1999 Tetsuya Okada & Niibe Yutaka
5 * Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org> 5 * Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
6 * Copyright (C) 2002, 2003, 2004 Paul Mundt 6 * Copyright (C) 2002, 2003, 2004, 2005 Paul Mundt
7 * Copyright (C) 2002 M. R. Brown <mrbrown@linux-sh.org> 7 * Copyright (C) 2002 M. R. Brown <mrbrown@linux-sh.org>
8 * 8 *
9 * Some code taken from i386 version. 9 * Some code taken from i386 version.
@@ -11,50 +11,21 @@
11 */ 11 */
12 12
13#include <linux/config.h> 13#include <linux/config.h>
14#include <linux/errno.h>
15#include <linux/module.h>
16#include <linux/sched.h>
17#include <linux/kernel.h> 14#include <linux/kernel.h>
18#include <linux/param.h> 15#include <linux/module.h>
19#include <linux/string.h>
20#include <linux/mm.h>
21#include <linux/interrupt.h>
22#include <linux/time.h>
23#include <linux/delay.h>
24#include <linux/init.h> 16#include <linux/init.h>
25#include <linux/smp.h>
26#include <linux/profile.h> 17#include <linux/profile.h>
27 18#include <asm/clock.h>
28#include <asm/processor.h>
29#include <asm/uaccess.h>
30#include <asm/io.h>
31#include <asm/irq.h>
32#include <asm/delay.h>
33#include <asm/machvec.h>
34#include <asm/rtc.h> 19#include <asm/rtc.h>
35#include <asm/freq.h> 20#include <asm/timer.h>
36#include <asm/cpu/timer.h>
37#ifdef CONFIG_SH_KGDB
38#include <asm/kgdb.h> 21#include <asm/kgdb.h>
39#endif
40
41#include <linux/timex.h>
42#include <linux/irq.h>
43
44#define TMU_TOCR_INIT 0x00
45#define TMU0_TCR_INIT 0x0020
46#define TMU_TSTR_INIT 1
47
48#define TMU0_TCR_CALIB 0x0000
49
50#ifdef CONFIG_CPU_SUBTYPE_ST40STB1
51#define CLOCKGEN_MEMCLKCR 0xbb040038
52#define MEMCLKCR_RATIO_MASK 0x7
53#endif /* CONFIG_CPU_SUBTYPE_ST40STB1 */
54 22
55extern unsigned long wall_jiffies; 23extern unsigned long wall_jiffies;
56#define TICK_SIZE (tick_nsec / 1000) 24struct sys_timer *sys_timer;
57DEFINE_SPINLOCK(tmu0_lock); 25
26/* Move this somewhere more sensible.. */
27DEFINE_SPINLOCK(rtc_lock);
28EXPORT_SYMBOL(rtc_lock);
58 29
59/* XXX: Can we initialize this in a routine somewhere? Dreamcast doesn't want 30/* XXX: Can we initialize this in a routine somewhere? Dreamcast doesn't want
60 * these routines anywhere... */ 31 * these routines anywhere... */
@@ -66,98 +37,14 @@ void (*rtc_get_time)(struct timespec *);
66int (*rtc_set_time)(const time_t); 37int (*rtc_set_time)(const time_t);
67#endif 38#endif
68 39
69#if defined(CONFIG_CPU_SUBTYPE_SH7300)
70static int md_table[] = { 1, 2, 3, 4, 6, 8, 12 };
71#endif
72#if defined(CONFIG_CPU_SH3)
73static int stc_multipliers[] = { 1, 2, 3, 4, 6, 1, 1, 1 };
74static int stc_values[] = { 0, 1, 4, 2, 5, 0, 0, 0 };
75#define bfc_divisors stc_multipliers
76#define bfc_values stc_values
77static int ifc_divisors[] = { 1, 2, 3, 4, 1, 1, 1, 1 };
78static int ifc_values[] = { 0, 1, 4, 2, 0, 0, 0, 0 };
79static int pfc_divisors[] = { 1, 2, 3, 4, 6, 1, 1, 1 };
80static int pfc_values[] = { 0, 1, 4, 2, 5, 0, 0, 0 };
81#elif defined(CONFIG_CPU_SH4)
82#if defined(CONFIG_CPU_SUBTYPE_SH73180)
83static int ifc_divisors[] = { 1, 2, 3, 4, 6, 8, 12, 16 };
84static int ifc_values[] = { 0, 1, 2, 3, 4, 5, 6, 7 };
85#define bfc_divisors ifc_divisors /* Same */
86#define bfc_values ifc_values
87#define pfc_divisors ifc_divisors /* Same */
88#define pfc_values ifc_values
89#else
90static int ifc_divisors[] = { 1, 2, 3, 4, 6, 8, 1, 1 };
91static int ifc_values[] = { 0, 1, 2, 3, 0, 4, 0, 5 };
92#define bfc_divisors ifc_divisors /* Same */
93#define bfc_values ifc_values
94static int pfc_divisors[] = { 2, 3, 4, 6, 8, 2, 2, 2 };
95static int pfc_values[] = { 0, 0, 1, 2, 0, 3, 0, 4 };
96#endif
97#else
98#error "Unknown ifc/bfc/pfc/stc values for this processor"
99#endif
100
101/* 40/*
102 * Scheduler clock - returns current time in nanosec units. 41 * Scheduler clock - returns current time in nanosec units.
103 */ 42 */
104unsigned long long sched_clock(void) 43unsigned long long __attribute__ ((weak)) sched_clock(void)
105{ 44{
106 return (unsigned long long)jiffies * (1000000000 / HZ); 45 return (unsigned long long)jiffies * (1000000000 / HZ);
107} 46}
108 47
109static unsigned long do_gettimeoffset(void)
110{
111 int count;
112 unsigned long flags;
113
114 static int count_p = 0x7fffffff; /* for the first call after boot */
115 static unsigned long jiffies_p = 0;
116
117 /*
118 * cache volatile jiffies temporarily; we have IRQs turned off.
119 */
120 unsigned long jiffies_t;
121
122 spin_lock_irqsave(&tmu0_lock, flags);
123 /* timer count may underflow right here */
124 count = ctrl_inl(TMU0_TCNT); /* read the latched count */
125
126 jiffies_t = jiffies;
127
128 /*
129 * avoiding timer inconsistencies (they are rare, but they happen)...
130 * there is one kind of problem that must be avoided here:
131 * 1. the timer counter underflows
132 */
133
134 if( jiffies_t == jiffies_p ) {
135 if( count > count_p ) {
136 /* the nutcase */
137
138 if(ctrl_inw(TMU0_TCR) & 0x100) { /* Check UNF bit */
139 /*
140 * We cannot detect lost timer interrupts ...
141 * well, that's why we call them lost, don't we? :)
142 * [hmm, on the Pentium and Alpha we can ... sort of]
143 */
144 count -= LATCH;
145 } else {
146 printk("do_slow_gettimeoffset(): hardware timer problem?\n");
147 }
148 }
149 } else
150 jiffies_p = jiffies_t;
151
152 count_p = count;
153 spin_unlock_irqrestore(&tmu0_lock, flags);
154
155 count = ((LATCH-1) - count) * TICK_SIZE;
156 count = (count + LATCH/2) / LATCH;
157
158 return count;
159}
160
161void do_gettimeofday(struct timeval *tv) 48void do_gettimeofday(struct timeval *tv)
162{ 49{
163 unsigned long seq; 50 unsigned long seq;
@@ -166,7 +53,7 @@ void do_gettimeofday(struct timeval *tv)
166 53
167 do { 54 do {
168 seq = read_seqbegin(&xtime_lock); 55 seq = read_seqbegin(&xtime_lock);
169 usec = do_gettimeoffset(); 56 usec = get_timer_offset();
170 57
171 lost = jiffies - wall_jiffies; 58 lost = jiffies - wall_jiffies;
172 if (lost) 59 if (lost)
@@ -202,7 +89,7 @@ int do_settimeofday(struct timespec *tv)
202 * wall time. Discover what correction gettimeofday() would have 89 * wall time. Discover what correction gettimeofday() would have
203 * made, and then undo it! 90 * made, and then undo it!
204 */ 91 */
205 nsec -= 1000 * (do_gettimeoffset() + 92 nsec -= 1000 * (get_timer_offset() +
206 (jiffies - wall_jiffies) * (1000000 / HZ)); 93 (jiffies - wall_jiffies) * (1000000 / HZ));
207 94
208 wtm_sec = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec); 95 wtm_sec = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec);
@@ -224,10 +111,10 @@ EXPORT_SYMBOL(do_settimeofday);
224static long last_rtc_update; 111static long last_rtc_update;
225 112
226/* 113/*
227 * timer_interrupt() needs to keep up the real-time clock, 114 * handle_timer_tick() needs to keep up the real-time clock,
228 * as well as call the "do_timer()" routine every clocktick 115 * as well as call the "do_timer()" routine every clocktick
229 */ 116 */
230static inline void do_timer_interrupt(int irq, struct pt_regs *regs) 117void handle_timer_tick(struct pt_regs *regs)
231{ 118{
232 do_timer(regs); 119 do_timer(regs);
233#ifndef CONFIG_SMP 120#ifndef CONFIG_SMP
@@ -252,337 +139,35 @@ static inline void do_timer_interrupt(int irq, struct pt_regs *regs)
252 if (rtc_set_time(xtime.tv_sec) == 0) 139 if (rtc_set_time(xtime.tv_sec) == 0)
253 last_rtc_update = xtime.tv_sec; 140 last_rtc_update = xtime.tv_sec;
254 else 141 else
255 last_rtc_update = xtime.tv_sec - 600; /* do it again in 60 s */ 142 /* do it again in 60s */
143 last_rtc_update = xtime.tv_sec - 600;
256 } 144 }
257} 145}
258 146
259/* 147static struct sysdev_class timer_sysclass = {
260 * This is the same as the above, except we _also_ save the current 148 set_kset_name("timer"),
261 * Time Stamp Counter value at the time of the timer interrupt, so that
262 * we later on can estimate the time of day more exactly.
263 */
264static irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
265{
266 unsigned long timer_status;
267
268 /* Clear UNF bit */
269 timer_status = ctrl_inw(TMU0_TCR);
270 timer_status &= ~0x100;
271 ctrl_outw(timer_status, TMU0_TCR);
272
273 /*
274 * Here we are in the timer irq handler. We just have irqs locally
275 * disabled but we don't know if the timer_bh is running on the other
276 * CPU. We need to avoid to SMP race with it. NOTE: we don' t need
277 * the irq version of write_lock because as just said we have irq
278 * locally disabled. -arca
279 */
280 write_seqlock(&xtime_lock);
281 do_timer_interrupt(irq, regs);
282 write_sequnlock(&xtime_lock);
283
284 return IRQ_HANDLED;
285}
286
287/*
288 * Hah! We'll see if this works (switching from usecs to nsecs).
289 */
290static unsigned int __init get_timer_frequency(void)
291{
292 u32 freq;
293 struct timespec ts1, ts2;
294 unsigned long diff_nsec;
295 unsigned long factor;
296
297 /* Setup the timer: We don't want to generate interrupts, just
298 * have it count down at its natural rate.
299 */
300 ctrl_outb(0, TMU_TSTR);
301#if !defined(CONFIG_CPU_SUBTYPE_SH7300)
302 ctrl_outb(TMU_TOCR_INIT, TMU_TOCR);
303#endif
304 ctrl_outw(TMU0_TCR_CALIB, TMU0_TCR);
305 ctrl_outl(0xffffffff, TMU0_TCOR);
306 ctrl_outl(0xffffffff, TMU0_TCNT);
307
308 rtc_get_time(&ts2);
309
310 do {
311 rtc_get_time(&ts1);
312 } while (ts1.tv_nsec == ts2.tv_nsec && ts1.tv_sec == ts2.tv_sec);
313
314 /* actually start the timer */
315 ctrl_outb(TMU_TSTR_INIT, TMU_TSTR);
316
317 do {
318 rtc_get_time(&ts2);
319 } while (ts1.tv_nsec == ts2.tv_nsec && ts1.tv_sec == ts2.tv_sec);
320
321 freq = 0xffffffff - ctrl_inl(TMU0_TCNT);
322 if (ts2.tv_nsec < ts1.tv_nsec) {
323 ts2.tv_nsec += 1000000000;
324 ts2.tv_sec--;
325 }
326
327 diff_nsec = (ts2.tv_sec - ts1.tv_sec) * 1000000000 + (ts2.tv_nsec - ts1.tv_nsec);
328
329 /* this should work well if the RTC has a precision of n Hz, where
330 * n is an integer. I don't think we have to worry about the other
331 * cases. */
332 factor = (1000000000 + diff_nsec/2) / diff_nsec;
333
334 if (factor * diff_nsec > 1100000000 ||
335 factor * diff_nsec < 900000000)
336 panic("weird RTC (diff_nsec %ld)", diff_nsec);
337
338 return freq * factor;
339}
340
341void (*board_time_init)(void);
342void (*board_timer_setup)(struct irqaction *irq);
343
344static unsigned int sh_pclk_freq __initdata = CONFIG_SH_PCLK_FREQ;
345
346static int __init sh_pclk_setup(char *str)
347{
348 unsigned int freq;
349
350 if (get_option(&str, &freq))
351 sh_pclk_freq = freq;
352
353 return 1;
354}
355__setup("sh_pclk=", sh_pclk_setup);
356
357static struct irqaction irq0 = { timer_interrupt, SA_INTERRUPT, CPU_MASK_NONE, "timer", NULL, NULL};
358
359void get_current_frequency_divisors(unsigned int *ifc, unsigned int *bfc, unsigned int *pfc)
360{
361 unsigned int frqcr = ctrl_inw(FRQCR);
362
363#if defined(CONFIG_CPU_SH3)
364#if defined(CONFIG_CPU_SUBTYPE_SH7300)
365 *ifc = md_table[((frqcr & 0x0070) >> 4)];
366 *bfc = md_table[((frqcr & 0x0700) >> 8)];
367 *pfc = md_table[frqcr & 0x0007];
368#elif defined(CONFIG_CPU_SUBTYPE_SH7705)
369 *bfc = stc_multipliers[(frqcr & 0x0300) >> 8];
370 *ifc = ifc_divisors[(frqcr & 0x0030) >> 4];
371 *pfc = pfc_divisors[frqcr & 0x0003];
372#else
373 unsigned int tmp;
374
375 tmp = (frqcr & 0x8000) >> 13;
376 tmp |= (frqcr & 0x0030) >> 4;
377 *bfc = stc_multipliers[tmp];
378 tmp = (frqcr & 0x4000) >> 12;
379 tmp |= (frqcr & 0x000c) >> 2;
380 *ifc = ifc_divisors[tmp];
381 tmp = (frqcr & 0x2000) >> 11;
382 tmp |= frqcr & 0x0003;
383 *pfc = pfc_divisors[tmp];
384#endif
385#elif defined(CONFIG_CPU_SH4)
386#if defined(CONFIG_CPU_SUBTYPE_SH73180)
387 *ifc = ifc_divisors[(frqcr>> 20) & 0x0007];
388 *bfc = bfc_divisors[(frqcr>> 12) & 0x0007];
389 *pfc = pfc_divisors[frqcr & 0x0007];
390#else
391 *ifc = ifc_divisors[(frqcr >> 6) & 0x0007];
392 *bfc = bfc_divisors[(frqcr >> 3) & 0x0007];
393 *pfc = pfc_divisors[frqcr & 0x0007];
394#endif
395#endif
396}
397
398/*
399 * This bit of ugliness builds up accessor routines to get at both
400 * the divisors and the physical values.
401 */
402#define _FREQ_TABLE(x) \
403 unsigned int get_##x##_divisor(unsigned int value) \
404 { return x##_divisors[value]; } \
405 \
406 unsigned int get_##x##_value(unsigned int divisor) \
407 { return x##_values[(divisor - 1)]; }
408
409_FREQ_TABLE(ifc);
410_FREQ_TABLE(bfc);
411_FREQ_TABLE(pfc);
412
413#ifdef CONFIG_CPU_SUBTYPE_ST40STB1
414
415/*
416 * The ST40 divisors are totally different so we set the cpu data
417 * clocks using a different algorithm
418 *
419 * I've just plugged this from the 2.4 code
420 * - Alex Bennee <kernel-hacker@bennee.com>
421 */
422#define CCN_PVR_CHIP_SHIFT 24
423#define CCN_PVR_CHIP_MASK 0xff
424#define CCN_PVR_CHIP_ST40STB1 0x4
425
426
427struct frqcr_data {
428 unsigned short frqcr;
429
430 struct {
431 unsigned char multiplier;
432 unsigned char divisor;
433 } factor[3];
434};
435
436static struct frqcr_data st40_frqcr_table[] = {
437 { 0x000, {{1,1}, {1,1}, {1,2}}},
438 { 0x002, {{1,1}, {1,1}, {1,4}}},
439 { 0x004, {{1,1}, {1,1}, {1,8}}},
440 { 0x008, {{1,1}, {1,2}, {1,2}}},
441 { 0x00A, {{1,1}, {1,2}, {1,4}}},
442 { 0x00C, {{1,1}, {1,2}, {1,8}}},
443 { 0x011, {{1,1}, {2,3}, {1,6}}},
444 { 0x013, {{1,1}, {2,3}, {1,3}}},
445 { 0x01A, {{1,1}, {1,2}, {1,4}}},
446 { 0x01C, {{1,1}, {1,2}, {1,8}}},
447 { 0x023, {{1,1}, {2,3}, {1,3}}},
448 { 0x02C, {{1,1}, {1,2}, {1,8}}},
449 { 0x048, {{1,2}, {1,2}, {1,4}}},
450 { 0x04A, {{1,2}, {1,2}, {1,6}}},
451 { 0x04C, {{1,2}, {1,2}, {1,8}}},
452 { 0x05A, {{1,2}, {1,3}, {1,6}}},
453 { 0x05C, {{1,2}, {1,3}, {1,6}}},
454 { 0x063, {{1,2}, {1,4}, {1,4}}},
455 { 0x06C, {{1,2}, {1,4}, {1,8}}},
456 { 0x091, {{1,3}, {1,3}, {1,6}}},
457 { 0x093, {{1,3}, {1,3}, {1,6}}},
458 { 0x0A3, {{1,3}, {1,6}, {1,6}}},
459 { 0x0DA, {{1,4}, {1,4}, {1,8}}},
460 { 0x0DC, {{1,4}, {1,4}, {1,8}}},
461 { 0x0EC, {{1,4}, {1,8}, {1,8}}},
462 { 0x123, {{1,4}, {1,4}, {1,8}}},
463 { 0x16C, {{1,4}, {1,8}, {1,8}}},
464}; 149};
465 150
466struct memclk_data { 151static int __init timer_init_sysfs(void)
467 unsigned char multiplier;
468 unsigned char divisor;
469};
470
471static struct memclk_data st40_memclk_table[8] = {
472 {1,1}, // 000
473 {1,2}, // 001
474 {1,3}, // 010
475 {2,3}, // 011
476 {1,4}, // 100
477 {1,6}, // 101
478 {1,8}, // 110
479 {1,8} // 111
480};
481
482static void st40_specific_time_init(unsigned int module_clock, unsigned short frqcr)
483{ 152{
484 unsigned int cpu_clock, master_clock, bus_clock, memory_clock; 153 int ret = sysdev_class_register(&timer_sysclass);
485 struct frqcr_data *d; 154 if (ret != 0)
486 int a; 155 return ret;
487 unsigned long memclkcr;
488 struct memclk_data *e;
489 156
490 for (a = 0; a < ARRAY_SIZE(st40_frqcr_table); a++) { 157 sys_timer->dev.cls = &timer_sysclass;
491 d = &st40_frqcr_table[a]; 158 return sysdev_register(&sys_timer->dev);
492 159}
493 if (d->frqcr == (frqcr & 0x1ff))
494 break;
495 }
496 160
497 if (a == ARRAY_SIZE(st40_frqcr_table)) { 161device_initcall(timer_init_sysfs);
498 d = st40_frqcr_table;
499 162
500 printk("ERROR: Unrecognised FRQCR value (0x%x), " 163void (*board_time_init)(void);
501 "using default multipliers\n", frqcr);
502 }
503
504 memclkcr = ctrl_inl(CLOCKGEN_MEMCLKCR);
505 e = &st40_memclk_table[memclkcr & MEMCLKCR_RATIO_MASK];
506
507 printk(KERN_INFO "Clock multipliers: CPU: %d/%d Bus: %d/%d "
508 "Mem: %d/%d Periph: %d/%d\n",
509 d->factor[0].multiplier, d->factor[0].divisor,
510 d->factor[1].multiplier, d->factor[1].divisor,
511 e->multiplier, e->divisor,
512 d->factor[2].multiplier, d->factor[2].divisor);
513
514 master_clock = module_clock * d->factor[2].divisor
515 / d->factor[2].multiplier;
516 bus_clock = master_clock * d->factor[1].multiplier
517 / d->factor[1].divisor;
518 memory_clock = master_clock * e->multiplier
519 / e->divisor;
520 cpu_clock = master_clock * d->factor[0].multiplier
521 / d->factor[0].divisor;
522
523 current_cpu_data.cpu_clock = cpu_clock;
524 current_cpu_data.master_clock = master_clock;
525 current_cpu_data.bus_clock = bus_clock;
526 current_cpu_data.memory_clock = memory_clock;
527 current_cpu_data.module_clock = module_clock;
528}
529#endif
530 164
531void __init time_init(void) 165void __init time_init(void)
532{ 166{
533 unsigned int timer_freq = 0;
534 unsigned int ifc, pfc, bfc;
535 unsigned long interval;
536#ifdef CONFIG_CPU_SUBTYPE_ST40STB1
537 unsigned long pvr;
538 unsigned short frqcr;
539#endif
540
541 if (board_time_init) 167 if (board_time_init)
542 board_time_init(); 168 board_time_init();
543 169
544 /* 170 clk_init();
545 * If we don't have an RTC (such as with the SH7300), don't attempt to
546 * probe the timer frequency. Rely on an either hardcoded peripheral
547 * clock value, or on the sh_pclk command line option. Note that we
548 * still need to have CONFIG_SH_PCLK_FREQ set in order for things like
549 * CLOCK_TICK_RATE to be sane.
550 */
551 current_cpu_data.module_clock = sh_pclk_freq;
552
553#ifdef CONFIG_SH_PCLK_CALC
554 /* XXX: Switch this over to a more generic test. */
555 {
556 unsigned int freq;
557
558 /*
559 * If we've specified a peripheral clock frequency, and we have
560 * an RTC, compare it against the autodetected value. Complain
561 * if there's a mismatch.
562 */
563 timer_freq = get_timer_frequency();
564 freq = timer_freq * 4;
565
566 if (sh_pclk_freq && (sh_pclk_freq/100*99 > freq || sh_pclk_freq/100*101 < freq)) {
567 printk(KERN_NOTICE "Calculated peripheral clock value "
568 "%d differs from sh_pclk value %d, fixing..\n",
569 freq, sh_pclk_freq);
570 current_cpu_data.module_clock = freq;
571 }
572 }
573#endif
574
575#ifdef CONFIG_CPU_SUBTYPE_ST40STB1
576 /* XXX: Update ST40 code to use board_time_init() */
577 pvr = ctrl_inl(CCN_PVR);
578 frqcr = ctrl_inw(FRQCR);
579 printk("time.c ST40 Probe: PVR %08lx, FRQCR %04hx\n", pvr, frqcr);
580
581 if (((pvr >> CCN_PVR_CHIP_SHIFT) & CCN_PVR_CHIP_MASK) == CCN_PVR_CHIP_ST40STB1)
582 st40_specific_time_init(current_cpu_data.module_clock, frqcr);
583 else
584#endif
585 get_current_frequency_divisors(&ifc, &bfc, &pfc);
586 171
587 if (rtc_get_time) { 172 if (rtc_get_time) {
588 rtc_get_time(&xtime); 173 rtc_get_time(&xtime);
@@ -594,51 +179,12 @@ void __init time_init(void)
594 set_normalized_timespec(&wall_to_monotonic, 179 set_normalized_timespec(&wall_to_monotonic,
595 -xtime.tv_sec, -xtime.tv_nsec); 180 -xtime.tv_sec, -xtime.tv_nsec);
596 181
597 if (board_timer_setup) {
598 board_timer_setup(&irq0);
599 } else {
600 setup_irq(TIMER_IRQ, &irq0);
601 }
602
603 /* 182 /*
604 * for ST40 chips the current_cpu_data should already be set 183 * Find the timer to use as the system timer, it will be
605 * so not having valid pfc/bfc/ifc shouldn't be a problem 184 * initialized for us.
606 */ 185 */
607 if (!current_cpu_data.master_clock) 186 sys_timer = get_sys_timer();
608 current_cpu_data.master_clock = current_cpu_data.module_clock * pfc; 187 printk(KERN_INFO "Using %s for system timer\n", sys_timer->name);
609 if (!current_cpu_data.bus_clock)
610 current_cpu_data.bus_clock = current_cpu_data.master_clock / bfc;
611 if (!current_cpu_data.cpu_clock)
612 current_cpu_data.cpu_clock = current_cpu_data.master_clock / ifc;
613
614 printk("CPU clock: %d.%02dMHz\n",
615 (current_cpu_data.cpu_clock / 1000000),
616 (current_cpu_data.cpu_clock % 1000000)/10000);
617 printk("Bus clock: %d.%02dMHz\n",
618 (current_cpu_data.bus_clock / 1000000),
619 (current_cpu_data.bus_clock % 1000000)/10000);
620#ifdef CONFIG_CPU_SUBTYPE_ST40STB1
621 printk("Memory clock: %d.%02dMHz\n",
622 (current_cpu_data.memory_clock / 1000000),
623 (current_cpu_data.memory_clock % 1000000)/10000);
624#endif
625 printk("Module clock: %d.%02dMHz\n",
626 (current_cpu_data.module_clock / 1000000),
627 (current_cpu_data.module_clock % 1000000)/10000);
628
629 interval = (current_cpu_data.module_clock/4 + HZ/2) / HZ;
630
631 printk("Interval = %ld\n", interval);
632
633 /* Start TMU0 */
634 ctrl_outb(0, TMU_TSTR);
635#if !defined(CONFIG_CPU_SUBTYPE_SH7300)
636 ctrl_outb(TMU_TOCR_INIT, TMU_TOCR);
637#endif
638 ctrl_outw(TMU0_TCR_INIT, TMU0_TCR);
639 ctrl_outl(interval, TMU0_TCOR);
640 ctrl_outl(interval, TMU0_TCNT);
641 ctrl_outb(TMU_TSTR_INIT, TMU_TSTR);
642 188
643#if defined(CONFIG_SH_KGDB) 189#if defined(CONFIG_SH_KGDB)
644 /* 190 /*
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