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1/*
2 * Keystone2 based boards and SOC related code.
3 *
4 * Copyright 2013 Texas Instruments, Inc.
5 * Cyril Chemparathy <cyril@ti.com>
6 * Santosh Shilimkar <santosh.shillimkar@ti.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms and conditions of the GNU General Public License,
10 * version 2, as published by the Free Software Foundation.
11 */
12#include <linux/io.h>
13#include <linux/of.h>
14#include <linux/init.h>
15#include <linux/of_platform.h>
16#include <linux/of_address.h>
17#include <linux/memblock.h>
18
19#include <asm/setup.h>
20#include <asm/mach/map.h>
21#include <asm/mach/arch.h>
22#include <asm/mach/time.h>
23#include <asm/smp_plat.h>
24#include <asm/memory.h>
25
26#include "memory.h"
27
28#include "keystone.h"
29
30static unsigned long keystone_dma_pfn_offset __read_mostly;
31
32static int keystone_platform_notifier(struct notifier_block *nb,
33 unsigned long event, void *data)
34{
35 struct device *dev = data;
36
37 if (event != BUS_NOTIFY_ADD_DEVICE)
38 return NOTIFY_DONE;
39
40 if (!dev)
41 return NOTIFY_BAD;
42
43 if (!dev->of_node) {
44 dev->dma_pfn_offset = keystone_dma_pfn_offset;
45 dev_err(dev, "set dma_pfn_offset%08lx\n",
46 dev->dma_pfn_offset);
47 }
48 return NOTIFY_OK;
49}
50
51static struct notifier_block platform_nb = {
52 .notifier_call = keystone_platform_notifier,
53};
54
55static void __init keystone_init(void)
56{
57 if (PHYS_OFFSET >= KEYSTONE_HIGH_PHYS_START) {
58 keystone_dma_pfn_offset = PFN_DOWN(KEYSTONE_HIGH_PHYS_START -
59 KEYSTONE_LOW_PHYS_START);
60 bus_register_notifier(&platform_bus_type, &platform_nb);
61 }
62 keystone_pm_runtime_init();
63}
64
65static long long __init keystone_pv_fixup(void)
66{
67 long long offset;
68 phys_addr_t mem_start, mem_end;
69
70 mem_start = memblock_start_of_DRAM();
71 mem_end = memblock_end_of_DRAM();
72
73 /* nothing to do if we are running out of the <32-bit space */
74 if (mem_start >= KEYSTONE_LOW_PHYS_START &&
75 mem_end <= KEYSTONE_LOW_PHYS_END)
76 return 0;
77
78 if (mem_start < KEYSTONE_HIGH_PHYS_START ||
79 mem_end > KEYSTONE_HIGH_PHYS_END) {
80 pr_crit("Invalid address space for memory (%08llx-%08llx)\n",
81 (u64)mem_start, (u64)mem_end);
82 return 0;
83 }
84
85 offset = KEYSTONE_HIGH_PHYS_START - KEYSTONE_LOW_PHYS_START;
86
87 /* Populate the arch idmap hook */
88 arch_phys_to_idmap_offset = -offset;
89
90 return offset;
91}
92
93static const char *const keystone_match[] __initconst = {
94 "ti,k2hk",
95 "ti,k2e",
96 "ti,k2l",
97 "ti,k2g",
98 "ti,keystone",
99 NULL,
100};
101
102DT_MACHINE_START(KEYSTONE, "Keystone")
103#if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE)
104 .dma_zone_size = SZ_2G,
105#endif
106 .smp = smp_ops(keystone_smp_ops),
107 .init_machine = keystone_init,
108 .dt_compat = keystone_match,
109 .pv_fixup = keystone_pv_fixup,
110MACHINE_END
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Keystone2 based boards and SOC related code.
4 *
5 * Copyright 2013 Texas Instruments, Inc.
6 * Cyril Chemparathy <cyril@ti.com>
7 * Santosh Shilimkar <santosh.shillimkar@ti.com>
8 */
9
10#include <linux/io.h>
11#include <linux/dma-map-ops.h>
12#include <linux/init.h>
13#include <linux/pm_runtime.h>
14#include <linux/pm_clock.h>
15#include <linux/memblock.h>
16#include <linux/of.h>
17#include <linux/platform_device.h>
18
19#include <asm/setup.h>
20#include <asm/mach/map.h>
21#include <asm/mach/arch.h>
22#include <asm/mach/time.h>
23#include <asm/page.h>
24
25#define KEYSTONE_LOW_PHYS_START 0x80000000ULL
26#define KEYSTONE_LOW_PHYS_SIZE 0x80000000ULL /* 2G */
27#define KEYSTONE_LOW_PHYS_END (KEYSTONE_LOW_PHYS_START + \
28 KEYSTONE_LOW_PHYS_SIZE - 1)
29
30#define KEYSTONE_HIGH_PHYS_START 0x800000000ULL
31#define KEYSTONE_HIGH_PHYS_SIZE 0x400000000ULL /* 16G */
32#define KEYSTONE_HIGH_PHYS_END (KEYSTONE_HIGH_PHYS_START + \
33 KEYSTONE_HIGH_PHYS_SIZE - 1)
34
35static struct dev_pm_domain keystone_pm_domain = {
36 .ops = {
37 USE_PM_CLK_RUNTIME_OPS
38 USE_PLATFORM_PM_SLEEP_OPS
39 },
40};
41
42static struct pm_clk_notifier_block platform_domain_notifier = {
43 .pm_domain = &keystone_pm_domain,
44 .con_ids = { NULL },
45};
46
47static const struct of_device_id of_keystone_table[] = {
48 {.compatible = "ti,k2hk"},
49 {.compatible = "ti,k2e"},
50 {.compatible = "ti,k2l"},
51 { /* end of list */ },
52};
53
54static int __init keystone_pm_runtime_init(void)
55{
56 struct device_node *np;
57
58 np = of_find_matching_node(NULL, of_keystone_table);
59 if (!np)
60 return 0;
61
62 pm_clk_add_notifier(&platform_bus_type, &platform_domain_notifier);
63
64 return 0;
65}
66
67#ifdef CONFIG_ARM_LPAE
68static int keystone_platform_notifier(struct notifier_block *nb,
69 unsigned long event, void *data)
70{
71 struct device *dev = data;
72
73 if (event != BUS_NOTIFY_ADD_DEVICE)
74 return NOTIFY_DONE;
75
76 if (!dev)
77 return NOTIFY_BAD;
78
79 if (!dev->of_node) {
80 int ret = dma_direct_set_offset(dev, KEYSTONE_HIGH_PHYS_START,
81 KEYSTONE_LOW_PHYS_START,
82 KEYSTONE_HIGH_PHYS_SIZE);
83 dev_err(dev, "set dma_offset%08llx%s\n",
84 KEYSTONE_HIGH_PHYS_START - KEYSTONE_LOW_PHYS_START,
85 ret ? " failed" : "");
86 }
87 return NOTIFY_OK;
88}
89
90static struct notifier_block platform_nb = {
91 .notifier_call = keystone_platform_notifier,
92};
93#endif /* CONFIG_ARM_LPAE */
94
95static void __init keystone_init(void)
96{
97#ifdef CONFIG_ARM_LPAE
98 if (PHYS_OFFSET >= KEYSTONE_HIGH_PHYS_START)
99 bus_register_notifier(&platform_bus_type, &platform_nb);
100#endif
101 keystone_pm_runtime_init();
102}
103
104static long long __init keystone_pv_fixup(void)
105{
106 long long offset;
107 u64 mem_start, mem_end;
108
109 mem_start = memblock_start_of_DRAM();
110 mem_end = memblock_end_of_DRAM();
111
112 /* nothing to do if we are running out of the <32-bit space */
113 if (mem_start >= KEYSTONE_LOW_PHYS_START &&
114 mem_end <= KEYSTONE_LOW_PHYS_END)
115 return 0;
116
117 if (mem_start < KEYSTONE_HIGH_PHYS_START ||
118 mem_end > KEYSTONE_HIGH_PHYS_END) {
119 pr_crit("Invalid address space for memory (%08llx-%08llx)\n",
120 mem_start, mem_end);
121 return 0;
122 }
123
124 offset = KEYSTONE_HIGH_PHYS_START - KEYSTONE_LOW_PHYS_START;
125
126 /* Populate the arch idmap hook */
127 arch_phys_to_idmap_offset = -offset;
128
129 return offset;
130}
131
132static const char *const keystone_match[] __initconst = {
133 "ti,k2hk",
134 "ti,k2e",
135 "ti,k2l",
136 "ti,k2g",
137 "ti,keystone",
138 NULL,
139};
140
141DT_MACHINE_START(KEYSTONE, "Keystone")
142#if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE)
143 .dma_zone_size = SZ_2G,
144#endif
145 .init_machine = keystone_init,
146 .dt_compat = keystone_match,
147 .pv_fixup = keystone_pv_fixup,
148MACHINE_END