1 /*
2  * Copyright 2014-2015 Freescale Semiconductor, Inc.
3  *
4  * SPDX-License-Identifier:	GPL-2.0+
5  */
6 
7 #include <common.h>
8 #include <libfdt.h>
9 #include <fdt_support.h>
10 #include <phy.h>
11 #ifdef CONFIG_FSL_LSCH3
12 #include <asm/arch/fdt.h>
13 #endif
14 #ifdef CONFIG_FSL_ESDHC
15 #include <fsl_esdhc.h>
16 #endif
17 #ifdef CONFIG_MP
18 #include <asm/arch/mp.h>
19 #endif
20 
21 int fdt_fixup_phy_connection(void *blob, int offset, phy_interface_t phyc)
22 {
23 	return fdt_setprop_string(blob, offset, "phy-connection-type",
24 					 phy_string_for_interface(phyc));
25 }
26 
27 #ifdef CONFIG_MP
28 void ft_fixup_cpu(void *blob)
29 {
30 	int off;
31 	__maybe_unused u64 spin_tbl_addr = (u64)get_spin_tbl_addr();
32 	fdt32_t *reg;
33 	int addr_cells;
34 	u64 val, core_id;
35 	size_t *boot_code_size = &(__secondary_boot_code_size);
36 
37 	off = fdt_path_offset(blob, "/cpus");
38 	if (off < 0) {
39 		puts("couldn't find /cpus node\n");
40 		return;
41 	}
42 	of_bus_default_count_cells(blob, off, &addr_cells, NULL);
43 
44 	off = fdt_node_offset_by_prop_value(blob, -1, "device_type", "cpu", 4);
45 	while (off != -FDT_ERR_NOTFOUND) {
46 		reg = (fdt32_t *)fdt_getprop(blob, off, "reg", 0);
47 		if (reg) {
48 			core_id = of_read_number(reg, addr_cells);
49 			if (core_id  == 0 || (is_core_online(core_id))) {
50 				val = spin_tbl_addr;
51 				val += id_to_core(core_id) *
52 				       SPIN_TABLE_ELEM_SIZE;
53 				val = cpu_to_fdt64(val);
54 				fdt_setprop_string(blob, off, "enable-method",
55 						   "spin-table");
56 				fdt_setprop(blob, off, "cpu-release-addr",
57 					    &val, sizeof(val));
58 			} else {
59 				debug("skipping offline core\n");
60 			}
61 		} else {
62 			puts("Warning: found cpu node without reg property\n");
63 		}
64 		off = fdt_node_offset_by_prop_value(blob, off, "device_type",
65 						    "cpu", 4);
66 	}
67 
68 	fdt_add_mem_rsv(blob, (uintptr_t)&secondary_boot_code,
69 			*boot_code_size);
70 }
71 #endif
72 
73 /*
74  * the burden is on the the caller to not request a count
75  * exceeding the bounds of the stream_ids[] array
76  */
77 void alloc_stream_ids(int start_id, int count, u32 *stream_ids, int max_cnt)
78 {
79 	int i;
80 
81 	if (count > max_cnt) {
82 		printf("\n%s: ERROR: max per-device stream ID count exceed\n",
83 		       __func__);
84 		return;
85 	}
86 
87 	for (i = 0; i < count; i++)
88 		stream_ids[i] = start_id++;
89 }
90 
91 /*
92  * This function updates the mmu-masters property on the SMMU
93  * node as per the SMMU binding-- phandle and list of stream IDs
94  * for each MMU master.
95  */
96 void append_mmu_masters(void *blob, const char *smmu_path,
97 			const char *master_name, u32 *stream_ids, int count)
98 {
99 	u32 phandle;
100 	int smmu_nodeoffset;
101 	int master_nodeoffset;
102 	int i;
103 
104 	/* get phandle of mmu master device */
105 	master_nodeoffset = fdt_path_offset(blob, master_name);
106 	if (master_nodeoffset < 0) {
107 		printf("\n%s: ERROR: master not found\n", __func__);
108 		return;
109 	}
110 	phandle = fdt_get_phandle(blob, master_nodeoffset);
111 	if (!phandle) { /* if master has no phandle, create one */
112 		phandle = fdt_create_phandle(blob, master_nodeoffset);
113 		if (!phandle) {
114 			printf("\n%s: ERROR: unable to create phandle\n",
115 			       __func__);
116 			return;
117 		}
118 	}
119 
120 	/* append it to mmu-masters */
121 	smmu_nodeoffset = fdt_path_offset(blob, smmu_path);
122 	if (fdt_appendprop_u32(blob, smmu_nodeoffset, "mmu-masters",
123 			       phandle) < 0) {
124 		printf("\n%s: ERROR: unable to update SMMU node\n", __func__);
125 		return;
126 	}
127 
128 	/* for each stream ID, append to mmu-masters */
129 	for (i = 0; i < count; i++) {
130 		fdt_appendprop_u32(blob, smmu_nodeoffset, "mmu-masters",
131 				   stream_ids[i]);
132 	}
133 
134 	/* fix up #stream-id-cells with stream ID count */
135 	if (fdt_setprop_u32(blob, master_nodeoffset, "#stream-id-cells",
136 			    count) < 0)
137 		printf("\n%s: ERROR: unable to update #stream-id-cells\n",
138 		       __func__);
139 }
140 
141 
142 /*
143  * The info below summarizes how streamID partitioning works
144  * for ls2085a and how it is conveyed to the OS via the device tree.
145  *
146  *  -non-PCI legacy, platform devices (USB, SD/MMC, SATA, DMA)
147  *     -all legacy devices get a unique ICID assigned and programmed in
148  *      their AMQR registers by u-boot
149  *     -u-boot updates the hardware device tree with streamID properties
150  *      for each platform/legacy device (smmu-masters property)
151  *
152  *  -PCIe
153  *     -for each PCI controller that is active (as per RCW settings),
154  *      u-boot will allocate a range of ICID and convey that to Linux via
155  *      the device tree (smmu-masters property)
156  *
157  *  -DPAA2
158  *     -u-boot will allocate a range of ICIDs to be used by the Management
159  *      Complex for containers and will set these values in the MC DPC image.
160  *     -the MC is responsible for allocating and setting up ICIDs
161  *      for all DPAA2 devices.
162  *
163  */
164 #ifdef CONFIG_FSL_LSCH3
165 static void fdt_fixup_smmu(void *blob)
166 {
167 	int nodeoffset;
168 
169 	nodeoffset = fdt_path_offset(blob, "/iommu@5000000");
170 	if (nodeoffset < 0) {
171 		printf("\n%s: WARNING: no SMMU node found\n", __func__);
172 		return;
173 	}
174 
175 	/* fixup for all PCI controllers */
176 #ifdef CONFIG_PCI
177 	fdt_fixup_smmu_pcie(blob);
178 #endif
179 }
180 #endif
181 
182 void ft_cpu_setup(void *blob, bd_t *bd)
183 {
184 #ifdef CONFIG_MP
185 	ft_fixup_cpu(blob);
186 #endif
187 
188 #ifdef CONFIG_SYS_NS16550
189 	do_fixup_by_compat_u32(blob, "fsl,ns16550",
190 			       "clock-frequency", CONFIG_SYS_NS16550_CLK, 1);
191 #endif
192 
193 #ifdef CONFIG_PCI
194 	ft_pci_setup(blob, bd);
195 #endif
196 
197 #ifdef CONFIG_FSL_ESDHC
198 	fdt_fixup_esdhc(blob, bd);
199 #endif
200 
201 #ifdef CONFIG_FSL_LSCH3
202 	fdt_fixup_smmu(blob);
203 #endif
204 }
205