Commit | Line | Data |
---|---|---|
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> | |
13eed989 SG |
24 | #include <asm/hardware/cache-l2x0.h> |
25 | #include <asm/hardware/gic.h> | |
26 | #include <asm/mach/arch.h> | |
27 | #include <asm/mach/time.h> | |
28 | #include <mach/common.h> | |
29 | #include <mach/hardware.h> | |
30 | ||
0575fb75 SG |
31 | void imx6q_restart(char mode, const char *cmd) |
32 | { | |
33 | struct device_node *np; | |
34 | void __iomem *wdog_base; | |
35 | ||
36 | np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-wdt"); | |
37 | wdog_base = of_iomap(np, 0); | |
38 | if (!wdog_base) | |
39 | goto soft; | |
40 | ||
41 | imx_src_prepare_restart(); | |
42 | ||
43 | /* enable wdog */ | |
44 | writew_relaxed(1 << 2, wdog_base); | |
45 | /* write twice to ensure the request will not get ignored */ | |
46 | writew_relaxed(1 << 2, wdog_base); | |
47 | ||
48 | /* wait for reset to assert ... */ | |
49 | mdelay(500); | |
50 | ||
51 | pr_err("Watchdog reset failed to assert reset\n"); | |
52 | ||
53 | /* delay to allow the serial port to show the message */ | |
54 | mdelay(50); | |
55 | ||
56 | soft: | |
57 | /* we'll take a jump through zero as a poor second */ | |
58 | soft_restart(0); | |
59 | } | |
60 | ||
477fce49 RZ |
61 | /* For imx6q sabrelite board: set KSZ9021RN RGMII pad skew */ |
62 | static int ksz9021rn_phy_fixup(struct phy_device *phydev) | |
63 | { | |
64 | /* min rx data delay */ | |
65 | phy_write(phydev, 0x0b, 0x8105); | |
66 | phy_write(phydev, 0x0c, 0x0000); | |
67 | ||
68 | /* max rx/tx clock delay, min rx/tx control delay */ | |
69 | phy_write(phydev, 0x0b, 0x8104); | |
70 | phy_write(phydev, 0x0c, 0xf0f0); | |
71 | phy_write(phydev, 0x0b, 0x104); | |
72 | ||
73 | return 0; | |
74 | } | |
75 | ||
13eed989 SG |
76 | static void __init imx6q_init_machine(void) |
77 | { | |
477fce49 RZ |
78 | if (of_machine_is_compatible("fsl,imx6q-sabrelite")) |
79 | phy_register_fixup_for_uid(PHY_ID_KSZ9021, MICREL_PHY_ID_MASK, | |
80 | ksz9021rn_phy_fixup); | |
81 | ||
13eed989 SG |
82 | of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); |
83 | ||
84 | imx6q_pm_init(); | |
85 | } | |
86 | ||
87 | static void __init imx6q_map_io(void) | |
88 | { | |
89 | imx_lluart_map_io(); | |
90 | imx_scu_map_io(); | |
f475058f | 91 | imx6q_clock_map_io(); |
13eed989 SG |
92 | } |
93 | ||
2a3267a4 | 94 | static int __init imx6q_gpio_add_irq_domain(struct device_node *np, |
13eed989 SG |
95 | struct device_node *interrupt_parent) |
96 | { | |
04aafd71 | 97 | static int gpio_irq_base = MXC_GPIO_IRQ_START + ARCH_NR_GPIOS; |
13eed989 | 98 | |
04aafd71 | 99 | gpio_irq_base -= 32; |
13eed989 | 100 | irq_domain_add_simple(np, gpio_irq_base); |
2a3267a4 SG |
101 | |
102 | return 0; | |
13eed989 SG |
103 | } |
104 | ||
105 | static const struct of_device_id imx6q_irq_match[] __initconst = { | |
106 | { .compatible = "arm,cortex-a9-gic", .data = gic_of_init, }, | |
107 | { .compatible = "fsl,imx6q-gpio", .data = imx6q_gpio_add_irq_domain, }, | |
108 | { /* sentinel */ } | |
109 | }; | |
110 | ||
111 | static void __init imx6q_init_irq(void) | |
112 | { | |
113 | l2x0_of_init(0, ~0UL); | |
114 | imx_src_init(); | |
115 | imx_gpc_init(); | |
116 | of_irq_init(imx6q_irq_match); | |
117 | } | |
118 | ||
119 | static void __init imx6q_timer_init(void) | |
120 | { | |
121 | mx6q_clocks_init(); | |
122 | } | |
123 | ||
124 | static struct sys_timer imx6q_timer = { | |
125 | .init = imx6q_timer_init, | |
126 | }; | |
127 | ||
128 | static const char *imx6q_dt_compat[] __initdata = { | |
752baf56 | 129 | "fsl,imx6q-arm2", |
3c8276c6 | 130 | "fsl,imx6q-sabrelite", |
13eed989 SG |
131 | NULL, |
132 | }; | |
133 | ||
134 | DT_MACHINE_START(IMX6Q, "Freescale i.MX6 Quad (Device Tree)") | |
135 | .map_io = imx6q_map_io, | |
136 | .init_irq = imx6q_init_irq, | |
137 | .handle_irq = imx6q_handle_irq, | |
138 | .timer = &imx6q_timer, | |
139 | .init_machine = imx6q_init_machine, | |
140 | .dt_compat = imx6q_dt_compat, | |
0575fb75 | 141 | .restart = imx6q_restart, |
13eed989 | 142 | MACHINE_END |