2 * arch/arm/mach-tegra/common.c
4 * Copyright (C) 2010 Google, Inc.
7 * Colin Cross <ccross@android.com>
9 * This software is licensed under the terms of the GNU General Public
10 * License version 2, as published by the Free Software Foundation, and
11 * may be copied, distributed, and modified under those terms.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
20 #include <linux/init.h>
22 #include <linux/clk.h>
23 #include <linux/delay.h>
24 #include <linux/of_irq.h>
26 #include <asm/hardware/cache-l2x0.h>
27 #include <asm/hardware/gic.h>
29 #include <mach/iomap.h>
30 #include <mach/powergate.h>
41 * Storage for debug-macro.S's state.
43 * This must be in .data not .bss so that it gets initialized each time the
44 * kernel is loaded. The data is declared here rather than debug-macro.S so
45 * that multiple inclusions of debug-macro.S point at the same data.
47 #define TEGRA_DEBUG_UART_OFFSET (TEGRA_DEBUG_UART_BASE & 0xFFFF)
48 u32 tegra_uart_config[3] = {
49 /* Debug UART initialization required */
51 /* Debug UART physical address */
52 (u32)(IO_APB_PHYS + TEGRA_DEBUG_UART_OFFSET),
53 /* Debug UART virtual address */
54 (u32)(IO_APB_VIRT + TEGRA_DEBUG_UART_OFFSET),
58 static const struct of_device_id tegra_dt_irq_match[] __initconst = {
59 { .compatible = "arm,cortex-a9-gic", .data = gic_of_init },
63 void __init tegra_dt_init_irq(void)
66 of_irq_init(tegra_dt_irq_match);
70 void tegra_assert_system_reset(char mode, const char *cmd)
72 void __iomem *reset = IO_ADDRESS(TEGRA_PMC_BASE + 0);
75 reg = readl_relaxed(reset);
77 writel_relaxed(reg, reset);
80 #ifdef CONFIG_ARCH_TEGRA_2x_SOC
81 static __initdata struct tegra_clk_init_table tegra20_clk_init_table[] = {
82 /* name parent rate enabled */
83 { "clk_m", NULL, 0, true },
84 { "pll_p", "clk_m", 216000000, true },
85 { "pll_p_out1", "pll_p", 28800000, true },
86 { "pll_p_out2", "pll_p", 48000000, true },
87 { "pll_p_out3", "pll_p", 72000000, true },
88 { "pll_p_out4", "pll_p", 24000000, true },
89 { "pll_c", "clk_m", 600000000, true },
90 { "pll_c_out1", "pll_c", 120000000, true },
91 { "sclk", "pll_c_out1", 120000000, true },
92 { "hclk", "sclk", 120000000, true },
93 { "pclk", "hclk", 60000000, true },
94 { "csite", NULL, 0, true },
95 { "emc", NULL, 0, true },
96 { "cpu", NULL, 0, true },
101 #ifdef CONFIG_ARCH_TEGRA_3x_SOC
102 static __initdata struct tegra_clk_init_table tegra30_clk_init_table[] = {
103 /* name parent rate enabled */
104 { "clk_m", NULL, 0, true },
105 { "pll_p", "clk_m", 408000000, true },
106 { "pll_p_out1", "pll_p", 9600000, true },
112 static void __init tegra_init_cache(u32 tag_latency, u32 data_latency)
114 #ifdef CONFIG_CACHE_L2X0
115 void __iomem *p = IO_ADDRESS(TEGRA_ARM_PERIF_BASE) + 0x3000;
116 u32 aux_ctrl, cache_type;
118 writel_relaxed(tag_latency, p + L2X0_TAG_LATENCY_CTRL);
119 writel_relaxed(data_latency, p + L2X0_DATA_LATENCY_CTRL);
121 cache_type = readl(p + L2X0_CACHE_TYPE);
122 aux_ctrl = (cache_type & 0x700) << (17-8);
123 aux_ctrl |= 0x6C000001;
125 l2x0_init(p, aux_ctrl, 0x8200c3fe);
130 #ifdef CONFIG_ARCH_TEGRA_2x_SOC
131 void __init tegra20_init_early(void)
135 tegra2_init_clocks();
136 tegra_clk_init_from_table(tegra20_clk_init_table);
137 tegra_init_cache(0x331, 0x441);
139 tegra_powergate_init();
140 tegra20_hotplug_init();
143 #ifdef CONFIG_ARCH_TEGRA_3x_SOC
144 void __init tegra30_init_early(void)
148 tegra30_init_clocks();
149 tegra_clk_init_from_table(tegra30_clk_init_table);
150 tegra_init_cache(0x441, 0x551);
152 tegra_powergate_init();
153 tegra30_hotplug_init();
157 void __init tegra_init_late(void)
159 tegra_powergate_debugfs_init();