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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
e5d8d54d SW |
2 | /* |
3 | * Old U-boot compatibility for PowerQUICC II | |
4 | * (a.k.a. 82xx with CPM, not the 8240 family of chips) | |
5 | * | |
6 | * Author: Scott Wood <scottwood@freescale.com> | |
7 | * | |
8 | * Copyright (c) 2007 Freescale Semiconductor, Inc. | |
e5d8d54d SW |
9 | */ |
10 | ||
11 | #include "ops.h" | |
12 | #include "stdio.h" | |
13 | #include "cuboot.h" | |
14 | #include "io.h" | |
a94b89a4 | 15 | #include "fsl-soc.h" |
e5d8d54d SW |
16 | |
17 | #define TARGET_CPM2 | |
18 | #define TARGET_HAS_ETH1 | |
19 | #include "ppcboot.h" | |
20 | ||
21 | static bd_t bd; | |
22 | ||
23 | struct cs_range { | |
24 | u32 csnum; | |
25 | u32 base; /* must be zero */ | |
26 | u32 addr; | |
27 | u32 size; | |
28 | }; | |
29 | ||
30 | struct pci_range { | |
31 | u32 flags; | |
32 | u32 pci_addr[2]; | |
33 | u32 phys_addr; | |
34 | u32 size[2]; | |
35 | }; | |
36 | ||
37 | struct cs_range cs_ranges_buf[MAX_PROP_LEN / sizeof(struct cs_range)]; | |
38 | struct pci_range pci_ranges_buf[MAX_PROP_LEN / sizeof(struct pci_range)]; | |
39 | ||
40 | /* Different versions of u-boot put the BCSR in different places, and | |
41 | * some don't set up the PCI PIC at all, so we assume the device tree is | |
42 | * sane and update the BRx registers appropriately. | |
43 | * | |
96fca1de SW |
44 | * For any node defined as compatible with fsl,pq2-localbus, |
45 | * #address/#size must be 2/1 for the localbus, and 1/1 for the parent bus. | |
46 | * Ranges must be for whole chip selects. | |
e5d8d54d SW |
47 | */ |
48 | static void update_cs_ranges(void) | |
49 | { | |
96fca1de | 50 | void *bus_node, *parent_node; |
e5d8d54d SW |
51 | u32 *ctrl_addr; |
52 | unsigned long ctrl_size; | |
53 | u32 naddr, nsize; | |
54 | int len; | |
55 | int i; | |
56 | ||
96fca1de SW |
57 | bus_node = finddevice("/localbus"); |
58 | if (!bus_node || !dt_is_compatible(bus_node, "fsl,pq2-localbus")) | |
e5d8d54d SW |
59 | return; |
60 | ||
61 | dt_get_reg_format(bus_node, &naddr, &nsize); | |
62 | if (naddr != 2 || nsize != 1) | |
63 | goto err; | |
64 | ||
65 | parent_node = get_parent(bus_node); | |
66 | if (!parent_node) | |
67 | goto err; | |
68 | ||
69 | dt_get_reg_format(parent_node, &naddr, &nsize); | |
70 | if (naddr != 1 || nsize != 1) | |
71 | goto err; | |
72 | ||
96fca1de | 73 | if (!dt_xlate_reg(bus_node, 0, (unsigned long *)&ctrl_addr, |
e5d8d54d SW |
74 | &ctrl_size)) |
75 | goto err; | |
76 | ||
77 | len = getprop(bus_node, "ranges", cs_ranges_buf, sizeof(cs_ranges_buf)); | |
78 | ||
79 | for (i = 0; i < len / sizeof(struct cs_range); i++) { | |
80 | u32 base, option; | |
81 | int cs = cs_ranges_buf[i].csnum; | |
82 | if (cs >= ctrl_size / 8) | |
83 | goto err; | |
84 | ||
85 | if (cs_ranges_buf[i].base != 0) | |
86 | goto err; | |
87 | ||
88 | base = in_be32(&ctrl_addr[cs * 2]); | |
89 | ||
90 | /* If CS is already valid, use the existing flags. | |
91 | * Otherwise, guess a sane default. | |
92 | */ | |
93 | if (base & 1) { | |
94 | base &= 0x7fff; | |
95 | option = in_be32(&ctrl_addr[cs * 2 + 1]) & 0x7fff; | |
96 | } else { | |
97 | base = 0x1801; | |
98 | option = 0x10; | |
99 | } | |
100 | ||
101 | out_be32(&ctrl_addr[cs * 2], 0); | |
102 | out_be32(&ctrl_addr[cs * 2 + 1], | |
103 | option | ~(cs_ranges_buf[i].size - 1)); | |
104 | out_be32(&ctrl_addr[cs * 2], base | cs_ranges_buf[i].addr); | |
105 | } | |
106 | ||
107 | return; | |
108 | ||
109 | err: | |
96fca1de | 110 | printf("Bad /localbus node\r\n"); |
e5d8d54d SW |
111 | } |
112 | ||
113 | /* Older u-boots don't set PCI up properly. Update the hardware to match | |
114 | * the device tree. The prefetch mem region and non-prefetch mem region | |
115 | * must be contiguous in the host bus. As required by the PCI binding, | |
116 | * PCI #addr/#size must be 3/2. The parent bus must be 1/1. Only | |
117 | * 32-bit PCI is supported. All three region types (prefetchable mem, | |
118 | * non-prefetchable mem, and I/O) must be present. | |
119 | */ | |
120 | static void fixup_pci(void) | |
121 | { | |
122 | struct pci_range *mem = NULL, *mmio = NULL, | |
123 | *io = NULL, *mem_base = NULL; | |
124 | u32 *pci_regs[3]; | |
125 | u8 *soc_regs; | |
126 | int i, len; | |
a94b89a4 | 127 | void *node, *parent_node; |
378458d8 | 128 | u32 naddr, nsize, mem_pow2, mem_mask; |
e5d8d54d | 129 | |
56809151 SW |
130 | node = finddevice("/pci"); |
131 | if (!node || !dt_is_compatible(node, "fsl,pq2-pci")) | |
e5d8d54d SW |
132 | return; |
133 | ||
e5d8d54d | 134 | for (i = 0; i < 3; i++) |
56809151 | 135 | if (!dt_xlate_reg(node, i, |
e5d8d54d SW |
136 | (unsigned long *)&pci_regs[i], NULL)) |
137 | goto err; | |
138 | ||
a94b89a4 SW |
139 | soc_regs = (u8 *)fsl_get_immr(); |
140 | if (!soc_regs) | |
378458d8 | 141 | goto unhandled; |
e5d8d54d | 142 | |
56809151 | 143 | dt_get_reg_format(node, &naddr, &nsize); |
e5d8d54d SW |
144 | if (naddr != 3 || nsize != 2) |
145 | goto err; | |
146 | ||
56809151 | 147 | parent_node = get_parent(node); |
e5d8d54d SW |
148 | if (!parent_node) |
149 | goto err; | |
150 | ||
151 | dt_get_reg_format(parent_node, &naddr, &nsize); | |
152 | if (naddr != 1 || nsize != 1) | |
378458d8 | 153 | goto unhandled; |
e5d8d54d | 154 | |
56809151 | 155 | len = getprop(node, "ranges", pci_ranges_buf, |
e5d8d54d SW |
156 | sizeof(pci_ranges_buf)); |
157 | ||
158 | for (i = 0; i < len / sizeof(struct pci_range); i++) { | |
159 | u32 flags = pci_ranges_buf[i].flags & 0x43000000; | |
160 | ||
161 | if (flags == 0x42000000) | |
162 | mem = &pci_ranges_buf[i]; | |
163 | else if (flags == 0x02000000) | |
164 | mmio = &pci_ranges_buf[i]; | |
165 | else if (flags == 0x01000000) | |
166 | io = &pci_ranges_buf[i]; | |
167 | } | |
168 | ||
169 | if (!mem || !mmio || !io) | |
378458d8 SW |
170 | goto unhandled; |
171 | if (mem->size[1] != mmio->size[1]) | |
172 | goto unhandled; | |
173 | if (mem->size[1] & (mem->size[1] - 1)) | |
174 | goto unhandled; | |
175 | if (io->size[1] & (io->size[1] - 1)) | |
176 | goto unhandled; | |
e5d8d54d SW |
177 | |
178 | if (mem->phys_addr + mem->size[1] == mmio->phys_addr) | |
179 | mem_base = mem; | |
180 | else if (mmio->phys_addr + mmio->size[1] == mem->phys_addr) | |
181 | mem_base = mmio; | |
182 | else | |
378458d8 | 183 | goto unhandled; |
e5d8d54d SW |
184 | |
185 | out_be32(&pci_regs[1][0], mem_base->phys_addr | 1); | |
186 | out_be32(&pci_regs[2][0], ~(mem->size[1] + mmio->size[1] - 1)); | |
187 | ||
188 | out_be32(&pci_regs[1][1], io->phys_addr | 1); | |
189 | out_be32(&pci_regs[2][1], ~(io->size[1] - 1)); | |
190 | ||
191 | out_le32(&pci_regs[0][0], mem->pci_addr[1] >> 12); | |
192 | out_le32(&pci_regs[0][2], mem->phys_addr >> 12); | |
193 | out_le32(&pci_regs[0][4], (~(mem->size[1] - 1) >> 12) | 0xa0000000); | |
194 | ||
195 | out_le32(&pci_regs[0][6], mmio->pci_addr[1] >> 12); | |
196 | out_le32(&pci_regs[0][8], mmio->phys_addr >> 12); | |
197 | out_le32(&pci_regs[0][10], (~(mmio->size[1] - 1) >> 12) | 0x80000000); | |
198 | ||
199 | out_le32(&pci_regs[0][12], io->pci_addr[1] >> 12); | |
200 | out_le32(&pci_regs[0][14], io->phys_addr >> 12); | |
201 | out_le32(&pci_regs[0][16], (~(io->size[1] - 1) >> 12) | 0xc0000000); | |
202 | ||
203 | /* Inbound translation */ | |
204 | out_le32(&pci_regs[0][58], 0); | |
205 | out_le32(&pci_regs[0][60], 0); | |
206 | ||
378458d8 SW |
207 | mem_pow2 = 1 << (__ilog2_u32(bd.bi_memsize - 1) + 1); |
208 | mem_mask = ~(mem_pow2 - 1) >> 12; | |
209 | out_le32(&pci_regs[0][62], 0xa0000000 | mem_mask); | |
e5d8d54d SW |
210 | |
211 | /* If PCI is disabled, drive RST high to enable. */ | |
212 | if (!(in_le32(&pci_regs[0][32]) & 1)) { | |
213 | /* Tpvrh (Power valid to RST# high) 100 ms */ | |
214 | udelay(100000); | |
215 | ||
216 | out_le32(&pci_regs[0][32], 1); | |
217 | ||
218 | /* Trhfa (RST# high to first cfg access) 2^25 clocks */ | |
219 | udelay(1020000); | |
220 | } | |
221 | ||
222 | /* Enable bus master and memory access */ | |
223 | out_le32(&pci_regs[0][64], 0x80000004); | |
224 | out_le32(&pci_regs[0][65], in_le32(&pci_regs[0][65]) | 6); | |
225 | ||
226 | /* Park the bus on PCI, and elevate PCI's arbitration priority, | |
227 | * as required by section 9.6 of the user's manual. | |
228 | */ | |
229 | out_8(&soc_regs[0x10028], 3); | |
230 | out_be32((u32 *)&soc_regs[0x1002c], 0x01236745); | |
231 | ||
232 | return; | |
233 | ||
234 | err: | |
378458d8 SW |
235 | printf("Bad PCI node -- using existing firmware setup.\r\n"); |
236 | return; | |
237 | ||
238 | unhandled: | |
239 | printf("Unsupported PCI node -- using existing firmware setup.\r\n"); | |
e5d8d54d SW |
240 | } |
241 | ||
242 | static void pq2_platform_fixups(void) | |
243 | { | |
244 | void *node; | |
245 | ||
246 | dt_fixup_memory(bd.bi_memstart, bd.bi_memsize); | |
247 | dt_fixup_mac_addresses(bd.bi_enetaddr, bd.bi_enet1addr); | |
248 | dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 4, bd.bi_busfreq); | |
249 | ||
250 | node = finddevice("/soc/cpm"); | |
6d817aa7 | 251 | if (node) |
e5d8d54d | 252 | setprop(node, "clock-frequency", &bd.bi_cpmfreq, 4); |
6d817aa7 SW |
253 | |
254 | node = finddevice("/soc/cpm/brg"); | |
255 | if (node) | |
256 | setprop(node, "clock-frequency", &bd.bi_brgfreq, 4); | |
e5d8d54d SW |
257 | |
258 | update_cs_ranges(); | |
259 | fixup_pci(); | |
260 | } | |
261 | ||
262 | void platform_init(unsigned long r3, unsigned long r4, unsigned long r5, | |
263 | unsigned long r6, unsigned long r7) | |
264 | { | |
265 | CUBOOT_INIT(); | |
2f0dfeaa | 266 | fdt_init(_dtb_start); |
e5d8d54d SW |
267 | serial_console_init(); |
268 | platform_ops.fixups = pq2_platform_fixups; | |
269 | } |