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Revision5046dcb5cf203f9b12f9124883a4a06e5bbd840e (tree)
Zeit2016-05-22 15:02:07
AutorYoshinori Sato <ysato@user...>
CommiterYoshinori Sato

Log Message

timer: Add SH4 driver.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>

Ändern Zusammenfassung

Diff

--- a/drivers/timer/Kconfig
+++ b/drivers/timer/Kconfig
@@ -46,4 +46,10 @@ config OMAP_TIMER
4646 help
4747 Select this to enable an timer for Omap devices.
4848
49+config SH4_TIMER
50+ bool "SH4 timer support"
51+ depends on TIMER
52+ help
53+ Select this to enable an timer for SH4 devices.
54+
4955 endmenu
--- a/drivers/timer/Makefile
+++ b/drivers/timer/Makefile
@@ -9,3 +9,4 @@ obj-$(CONFIG_ALTERA_TIMER) += altera_timer.o
99 obj-$(CONFIG_SANDBOX_TIMER) += sandbox_timer.o
1010 obj-$(CONFIG_X86_TSC_TIMER) += tsc_timer.o
1111 obj-$(CONFIG_OMAP_TIMER) += omap-timer.o
12+obj-$(CONFIG_SH4_TIMER) += sh4_timer.o
--- /dev/null
+++ b/drivers/timer/sh4_timer.c
@@ -0,0 +1,89 @@
1+/*
2+ * (C) Copyright 2009
3+ * Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
4+ *
5+ * (C) Copyright 2007-2012
6+ * Nobobuhiro Iwamatsu <iwamatsu@nigauri.org>
7+ *
8+ * (C) Copyright 2003
9+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
10+ *
11+ * SPDX-License-Identifier: GPL-2.0+
12+ */
13+
14+#include <common.h>
15+#include <dm.h>
16+#include <timer.h>
17+#include <asm/processor.h>
18+#include <asm/io.h>
19+
20+DECLARE_GLOBAL_DATA_PTR;
21+
22+struct sh4_timer_platdata {
23+ unsigned char *regs;
24+ int ch;
25+};
26+
27+static int timer_read_counter(struct udevice *dev, u64 *count)
28+{
29+ struct sh4_timer_platdata *plat = dev_get_platdata(dev);
30+
31+ *count = timer_conv_64(~readl(plat->regs + 8 + plat->ch * 12 + 4));
32+ return 0;
33+}
34+
35+static void tmu_timer_start(unsigned char *reg, unsigned int timer)
36+{
37+ if (timer > 2)
38+ return;
39+ writeb(readb(reg + 1) | (1 << timer), reg + 1);
40+}
41+
42+static void tmu_timer_stop(unsigned char *reg, unsigned int timer)
43+{
44+ if (timer > 2)
45+ return;
46+ writeb(readb(reg + 1) & ~(1 << timer), reg + 1);
47+}
48+
49+static int sh4_timer_probe(struct udevice *dev)
50+{
51+ struct sh4_timer_platdata *plat = dev_get_platdata(dev);
52+
53+ writew(0, plat->regs + 8 + (plat->ch * 12));
54+
55+ tmu_timer_stop(plat->regs, plat->ch);
56+ tmu_timer_start(plat->regs, plat->ch);
57+
58+ return 0;
59+}
60+
61+static int sh4_timer_ofdata_to_platdata(struct udevice *dev)
62+{
63+ struct sh4_timer_platdata *plat = dev_get_platdata(dev);
64+
65+ plat->regs = map_physmem(dev_get_addr(dev), 48, MAP_NOCACHE);
66+ plat->ch = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
67+ "renesas,channel", 0);
68+ return 0;
69+}
70+
71+static const struct timer_ops sh4_timer_ops = {
72+ .get_count = timer_read_counter,
73+};
74+
75+static const struct udevice_id sh4_timer_ids[] = {
76+ { .compatible = "renesas,sh4-tmu" },
77+ {}
78+};
79+
80+U_BOOT_DRIVER(sh4_timer) = {
81+ .name = "sh4_timer",
82+ .id = UCLASS_TIMER,
83+ .of_match = of_match_ptr(sh4_timer_ids),
84+ .ofdata_to_platdata = of_match_ptr(sh4_timer_ofdata_to_platdata),
85+ .platdata_auto_alloc_size = sizeof(struct sh4_timer_platdata),
86+ .probe = sh4_timer_probe,
87+ .ops = &sh4_timer_ops,
88+ .flags = DM_FLAG_PRE_RELOC,
89+};