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13eed989 SG |
1 | /* |
2 | * Copyright 2011 Freescale Semiconductor, Inc. | |
3 | * Copyright 2011 Linaro Ltd. | |
4 | * | |
5 | * The code contained herein is licensed under the GNU General Public | |
6 | * License. You may obtain a copy of the GNU General Public License | |
7 | * Version 2 or later at the following locations: | |
8 | * | |
9 | * http://www.opensource.org/licenses/gpl-license.html | |
10 | * http://www.gnu.org/copyleft/gpl.html | |
11 | */ | |
12 | ||
0575fb75 | 13 | #include <linux/delay.h> |
13eed989 | 14 | #include <linux/init.h> |
0575fb75 | 15 | #include <linux/io.h> |
13eed989 SG |
16 | #include <linux/irq.h> |
17 | #include <linux/irqdomain.h> | |
18 | #include <linux/of.h> | |
0575fb75 | 19 | #include <linux/of_address.h> |
13eed989 SG |
20 | #include <linux/of_irq.h> |
21 | #include <linux/of_platform.h> | |
477fce49 RZ |
22 | #include <linux/phy.h> |
23 | #include <linux/micrel_phy.h> | |
58458e03 | 24 | #include <asm/smp_twd.h> |
13eed989 SG |
25 | #include <asm/hardware/cache-l2x0.h> |
26 | #include <asm/hardware/gic.h> | |
27 | #include <asm/mach/arch.h> | |
28 | #include <asm/mach/time.h> | |
9f97da78 | 29 | #include <asm/system_misc.h> |
13eed989 SG |
30 | #include <mach/common.h> |
31 | #include <mach/hardware.h> | |
32 | ||
0575fb75 SG |
33 | void imx6q_restart(char mode, const char *cmd) |
34 | { | |
35 | struct device_node *np; | |
36 | void __iomem *wdog_base; | |
37 | ||
38 | np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-wdt"); | |
39 | wdog_base = of_iomap(np, 0); | |
40 | if (!wdog_base) | |
41 | goto soft; | |
42 | ||
43 | imx_src_prepare_restart(); | |
44 | ||
45 | /* enable wdog */ | |
46 | writew_relaxed(1 << 2, wdog_base); | |
47 | /* write twice to ensure the request will not get ignored */ | |
48 | writew_relaxed(1 << 2, wdog_base); | |
49 | ||
50 | /* wait for reset to assert ... */ | |
51 | mdelay(500); | |
52 | ||
53 | pr_err("Watchdog reset failed to assert reset\n"); | |
54 | ||
55 | /* delay to allow the serial port to show the message */ | |
56 | mdelay(50); | |
57 | ||
58 | soft: | |
59 | /* we'll take a jump through zero as a poor second */ | |
60 | soft_restart(0); | |
61 | } | |
62 | ||
477fce49 RZ |
63 | /* For imx6q sabrelite board: set KSZ9021RN RGMII pad skew */ |
64 | static int ksz9021rn_phy_fixup(struct phy_device *phydev) | |
65 | { | |
66 | /* min rx data delay */ | |
67 | phy_write(phydev, 0x0b, 0x8105); | |
68 | phy_write(phydev, 0x0c, 0x0000); | |
69 | ||
70 | /* max rx/tx clock delay, min rx/tx control delay */ | |
71 | phy_write(phydev, 0x0b, 0x8104); | |
72 | phy_write(phydev, 0x0c, 0xf0f0); | |
73 | phy_write(phydev, 0x0b, 0x104); | |
74 | ||
75 | return 0; | |
76 | } | |
77 | ||
13eed989 SG |
78 | static void __init imx6q_init_machine(void) |
79 | { | |
477fce49 RZ |
80 | if (of_machine_is_compatible("fsl,imx6q-sabrelite")) |
81 | phy_register_fixup_for_uid(PHY_ID_KSZ9021, MICREL_PHY_ID_MASK, | |
82 | ksz9021rn_phy_fixup); | |
83 | ||
13eed989 SG |
84 | of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); |
85 | ||
86 | imx6q_pm_init(); | |
87 | } | |
88 | ||
89 | static void __init imx6q_map_io(void) | |
90 | { | |
91 | imx_lluart_map_io(); | |
92 | imx_scu_map_io(); | |
f475058f | 93 | imx6q_clock_map_io(); |
13eed989 SG |
94 | } |
95 | ||
2a3267a4 | 96 | static int __init imx6q_gpio_add_irq_domain(struct device_node *np, |
13eed989 SG |
97 | struct device_node *interrupt_parent) |
98 | { | |
04aafd71 | 99 | static int gpio_irq_base = MXC_GPIO_IRQ_START + ARCH_NR_GPIOS; |
13eed989 | 100 | |
04aafd71 | 101 | gpio_irq_base -= 32; |
6b783f7c GL |
102 | irq_domain_add_legacy(np, 32, gpio_irq_base, 0, &irq_domain_simple_ops, |
103 | NULL); | |
2a3267a4 SG |
104 | |
105 | return 0; | |
13eed989 SG |
106 | } |
107 | ||
108 | static const struct of_device_id imx6q_irq_match[] __initconst = { | |
109 | { .compatible = "arm,cortex-a9-gic", .data = gic_of_init, }, | |
110 | { .compatible = "fsl,imx6q-gpio", .data = imx6q_gpio_add_irq_domain, }, | |
111 | { /* sentinel */ } | |
112 | }; | |
113 | ||
114 | static void __init imx6q_init_irq(void) | |
115 | { | |
116 | l2x0_of_init(0, ~0UL); | |
117 | imx_src_init(); | |
118 | imx_gpc_init(); | |
119 | of_irq_init(imx6q_irq_match); | |
120 | } | |
121 | ||
122 | static void __init imx6q_timer_init(void) | |
123 | { | |
124 | mx6q_clocks_init(); | |
58458e03 | 125 | twd_local_timer_of_register(); |
13eed989 SG |
126 | } |
127 | ||
128 | static struct sys_timer imx6q_timer = { | |
129 | .init = imx6q_timer_init, | |
130 | }; | |
131 | ||
132 | static const char *imx6q_dt_compat[] __initdata = { | |
752baf56 | 133 | "fsl,imx6q-arm2", |
3c8276c6 | 134 | "fsl,imx6q-sabrelite", |
691d2640 | 135 | "fsl,imx6q-sabresd", |
3f8976d9 | 136 | "fsl,imx6q", |
13eed989 SG |
137 | NULL, |
138 | }; | |
139 | ||
140 | DT_MACHINE_START(IMX6Q, "Freescale i.MX6 Quad (Device Tree)") | |
141 | .map_io = imx6q_map_io, | |
142 | .init_irq = imx6q_init_irq, | |
143 | .handle_irq = imx6q_handle_irq, | |
144 | .timer = &imx6q_timer, | |
145 | .init_machine = imx6q_init_machine, | |
146 | .dt_compat = imx6q_dt_compat, | |
0575fb75 | 147 | .restart = imx6q_restart, |
13eed989 | 148 | MACHINE_END |