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83d290c5 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
f61aefc1 SR |
2 | /* |
3 | * Copyright (C) 2016 Stefan Roese <sr@denx.de> | |
61143f74 | 4 | * Copyright (C) 2020 Marek Behún <kabel@kernel.org> |
f61aefc1 SR |
5 | */ |
6 | ||
d678a59d | 7 | #include <common.h> |
9a3b4ceb | 8 | #include <cpu_func.h> |
f61aefc1 SR |
9 | #include <dm.h> |
10 | #include <fdtdec.h> | |
4a82fca8 | 11 | #include <fdt_support.h> |
691d719d | 12 | #include <init.h> |
401d1c4f | 13 | #include <asm/global_data.h> |
cd93d625 | 14 | #include <linux/bitops.h> |
b08c8c48 | 15 | #include <linux/libfdt.h> |
65375d02 | 16 | #include <linux/sizes.h> |
f61aefc1 SR |
17 | #include <asm/io.h> |
18 | #include <asm/system.h> | |
19 | #include <asm/arch/cpu.h> | |
20 | #include <asm/arch/soc.h> | |
21 | #include <asm/armv8/mmu.h> | |
a129f64f | 22 | #include <sort.h> |
f61aefc1 | 23 | |
f61aefc1 SR |
24 | /* Armada 3700 */ |
25 | #define MVEBU_GPIO_NB_REG_BASE (MVEBU_REGISTER(0x13800)) | |
26 | ||
27 | #define MVEBU_TEST_PIN_LATCH_N (MVEBU_GPIO_NB_REG_BASE + 0x8) | |
28 | #define MVEBU_XTAL_MODE_MASK BIT(9) | |
29 | #define MVEBU_XTAL_MODE_OFFS 9 | |
30 | #define MVEBU_XTAL_CLOCK_25MHZ 0x0 | |
31 | #define MVEBU_XTAL_CLOCK_40MHZ 0x1 | |
32 | ||
33 | #define MVEBU_NB_WARM_RST_REG (MVEBU_GPIO_NB_REG_BASE + 0x40) | |
34 | #define MVEBU_NB_WARM_RST_MAGIC_NUM 0x1d1e | |
35 | ||
a129f64f MB |
36 | /* Armada 3700 CPU Address Decoder registers */ |
37 | #define MVEBU_CPU_DEC_WIN_REG_BASE (size_t)(MVEBU_REGISTER(0xcf00)) | |
38 | #define MVEBU_CPU_DEC_WIN_CTRL(w) \ | |
39 | (MVEBU_CPU_DEC_WIN_REG_BASE + ((w) << 4)) | |
40 | #define MVEBU_CPU_DEC_WIN_CTRL_EN BIT(0) | |
41 | #define MVEBU_CPU_DEC_WIN_CTRL_TGT_MASK 0xf | |
42 | #define MVEBU_CPU_DEC_WIN_CTRL_TGT_OFFS 4 | |
43 | #define MVEBU_CPU_DEC_WIN_CTRL_TGT_DRAM 0 | |
44 | #define MVEBU_CPU_DEC_WIN_CTRL_TGT_PCIE 2 | |
45 | #define MVEBU_CPU_DEC_WIN_SIZE(w) (MVEBU_CPU_DEC_WIN_CTRL(w) + 0x4) | |
46 | #define MVEBU_CPU_DEC_WIN_BASE(w) (MVEBU_CPU_DEC_WIN_CTRL(w) + 0x8) | |
47 | #define MVEBU_CPU_DEC_WIN_REMAP(w) (MVEBU_CPU_DEC_WIN_CTRL(w) + 0xc) | |
48 | #define MVEBU_CPU_DEC_WIN_GRANULARITY 16 | |
49 | #define MVEBU_CPU_DEC_WINS 5 | |
65375d02 T |
50 | #define MVEBU_CPU_DEC_CCI_BASE (MVEBU_CPU_DEC_WIN_REG_BASE + 0xe0) |
51 | #define MVEBU_CPU_DEC_ROM_BASE (MVEBU_CPU_DEC_WIN_REG_BASE + 0xf4) | |
a129f64f | 52 | |
65375d02 | 53 | #define MAX_MEM_MAP_REGIONS (MVEBU_CPU_DEC_WINS + 4) |
a129f64f MB |
54 | |
55 | #define A3700_PTE_BLOCK_NORMAL \ | |
56 | (PTE_BLOCK_MEMTYPE(MT_NORMAL) | PTE_BLOCK_INNER_SHARE) | |
57 | #define A3700_PTE_BLOCK_DEVICE \ | |
58 | (PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) | PTE_BLOCK_NON_SHARE) | |
59 | ||
60 | DECLARE_GLOBAL_DATA_PTR; | |
61 | ||
62 | static struct mm_region mvebu_mem_map[MAX_MEM_MAP_REGIONS] = { | |
f61aefc1 | 63 | { |
a129f64f MB |
64 | /* |
65 | * SRAM, MMIO regions | |
18ab0602 | 66 | * Don't remove this, build_mem_map needs it. |
a129f64f MB |
67 | */ |
68 | .phys = SOC_REGS_PHY_BASE, | |
69 | .virt = SOC_REGS_PHY_BASE, | |
f61aefc1 | 70 | .size = 0x02000000UL, /* 32MiB internal registers */ |
a129f64f | 71 | .attrs = A3700_PTE_BLOCK_DEVICE |
92e7a681 | 72 | }, |
f61aefc1 SR |
73 | }; |
74 | ||
75 | struct mm_region *mem_map = mvebu_mem_map; | |
76 | ||
a129f64f MB |
77 | static int get_cpu_dec_win(int win, u32 *tgt, u32 *base, u32 *size) |
78 | { | |
79 | u32 reg; | |
80 | ||
81 | reg = readl(MVEBU_CPU_DEC_WIN_CTRL(win)); | |
82 | if (!(reg & MVEBU_CPU_DEC_WIN_CTRL_EN)) | |
83 | return -1; | |
84 | ||
85 | if (tgt) { | |
86 | reg >>= MVEBU_CPU_DEC_WIN_CTRL_TGT_OFFS; | |
87 | reg &= MVEBU_CPU_DEC_WIN_CTRL_TGT_MASK; | |
88 | *tgt = reg; | |
89 | } | |
90 | ||
91 | if (base) { | |
92 | reg = readl(MVEBU_CPU_DEC_WIN_BASE(win)); | |
93 | *base = reg << MVEBU_CPU_DEC_WIN_GRANULARITY; | |
94 | } | |
95 | ||
96 | if (size) { | |
97 | /* | |
98 | * Window size is encoded as the number of 1s from LSB to MSB, | |
99 | * followed by 0s. The number of 1s specifies the size in 64 KiB | |
100 | * granularity. | |
101 | */ | |
102 | reg = readl(MVEBU_CPU_DEC_WIN_SIZE(win)); | |
103 | *size = ((reg + 1) << MVEBU_CPU_DEC_WIN_GRANULARITY); | |
104 | } | |
105 | ||
106 | return 0; | |
107 | } | |
108 | ||
109 | /* | |
110 | * Builds mem_map according to CPU Address Decoder settings, which were set by | |
111 | * the TIMH image on the Cortex-M3 secure processor, or by ARM Trusted Firmware | |
112 | */ | |
113 | static void build_mem_map(void) | |
114 | { | |
115 | int win, region; | |
65375d02 | 116 | u32 reg; |
a129f64f MB |
117 | |
118 | region = 1; | |
65375d02 T |
119 | |
120 | /* CCI-400 */ | |
121 | reg = readl(MVEBU_CPU_DEC_CCI_BASE); | |
122 | mvebu_mem_map[region].phys = reg << 20; | |
123 | mvebu_mem_map[region].virt = reg << 20; | |
124 | mvebu_mem_map[region].size = SZ_64K; | |
125 | mvebu_mem_map[region].attrs = A3700_PTE_BLOCK_DEVICE; | |
126 | ++region; | |
127 | ||
128 | /* AP BootROM */ | |
129 | reg = readl(MVEBU_CPU_DEC_ROM_BASE); | |
130 | mvebu_mem_map[region].phys = reg << 20; | |
131 | mvebu_mem_map[region].virt = reg << 20; | |
132 | mvebu_mem_map[region].size = SZ_1M; | |
133 | mvebu_mem_map[region].attrs = A3700_PTE_BLOCK_NORMAL; | |
134 | ++region; | |
135 | ||
a129f64f MB |
136 | for (win = 0; win < MVEBU_CPU_DEC_WINS; ++win) { |
137 | u32 base, tgt, size; | |
138 | u64 attrs; | |
139 | ||
140 | /* skip disabled windows */ | |
141 | if (get_cpu_dec_win(win, &tgt, &base, &size)) | |
142 | continue; | |
143 | ||
144 | if (tgt == MVEBU_CPU_DEC_WIN_CTRL_TGT_DRAM) | |
145 | attrs = A3700_PTE_BLOCK_NORMAL; | |
146 | else if (tgt == MVEBU_CPU_DEC_WIN_CTRL_TGT_PCIE) | |
147 | attrs = A3700_PTE_BLOCK_DEVICE; | |
148 | else | |
149 | /* skip windows with other targets */ | |
150 | continue; | |
151 | ||
152 | mvebu_mem_map[region].phys = base; | |
153 | mvebu_mem_map[region].virt = base; | |
154 | mvebu_mem_map[region].size = size; | |
155 | mvebu_mem_map[region].attrs = attrs; | |
156 | ++region; | |
157 | } | |
158 | ||
159 | /* add list terminator */ | |
160 | mvebu_mem_map[region].size = 0; | |
161 | mvebu_mem_map[region].attrs = 0; | |
162 | } | |
163 | ||
164 | void enable_caches(void) | |
165 | { | |
a129f64f MB |
166 | icache_enable(); |
167 | dcache_enable(); | |
168 | } | |
169 | ||
170 | int a3700_dram_init(void) | |
171 | { | |
172 | int win; | |
173 | ||
2fb7426c T |
174 | build_mem_map(); |
175 | ||
a129f64f MB |
176 | gd->ram_size = 0; |
177 | for (win = 0; win < MVEBU_CPU_DEC_WINS; ++win) { | |
178 | u32 base, tgt, size; | |
179 | ||
180 | /* skip disabled windows */ | |
181 | if (get_cpu_dec_win(win, &tgt, &base, &size)) | |
182 | continue; | |
183 | ||
184 | /* skip non-DRAM windows */ | |
185 | if (tgt != MVEBU_CPU_DEC_WIN_CTRL_TGT_DRAM) | |
186 | continue; | |
187 | ||
188 | /* | |
189 | * It is possible that one image was built for boards with | |
190 | * different RAM sizes, for example 512 MiB and 1 GiB. | |
191 | * We therefore try to determine the actual RAM size in the | |
192 | * window with get_ram_size. | |
193 | */ | |
194 | gd->ram_size += get_ram_size((void *)(size_t)base, size); | |
195 | } | |
196 | ||
197 | return 0; | |
198 | } | |
199 | ||
200 | struct a3700_dram_window { | |
201 | size_t base, size; | |
202 | }; | |
203 | ||
204 | static int dram_win_cmp(const void *a, const void *b) | |
205 | { | |
206 | size_t ab, bb; | |
207 | ||
208 | ab = ((const struct a3700_dram_window *)a)->base; | |
209 | bb = ((const struct a3700_dram_window *)b)->base; | |
210 | ||
211 | if (ab < bb) | |
212 | return -1; | |
213 | else if (ab > bb) | |
214 | return 1; | |
215 | else | |
216 | return 0; | |
217 | } | |
218 | ||
219 | int a3700_dram_init_banksize(void) | |
220 | { | |
221 | struct a3700_dram_window dram_wins[MVEBU_CPU_DEC_WINS]; | |
222 | int bank, win, ndram_wins; | |
223 | u32 last_end; | |
224 | size_t size; | |
225 | ||
226 | ndram_wins = 0; | |
227 | for (win = 0; win < MVEBU_CPU_DEC_WINS; ++win) { | |
228 | u32 base, tgt, size; | |
229 | ||
230 | /* skip disabled windows */ | |
231 | if (get_cpu_dec_win(win, &tgt, &base, &size)) | |
232 | continue; | |
233 | ||
234 | /* skip non-DRAM windows */ | |
235 | if (tgt != MVEBU_CPU_DEC_WIN_CTRL_TGT_DRAM) | |
236 | continue; | |
237 | ||
238 | dram_wins[win].base = base; | |
239 | dram_wins[win].size = size; | |
240 | ++ndram_wins; | |
241 | } | |
242 | ||
243 | qsort(dram_wins, ndram_wins, sizeof(dram_wins[0]), dram_win_cmp); | |
244 | ||
245 | bank = 0; | |
246 | last_end = -1; | |
247 | ||
248 | for (win = 0; win < ndram_wins; ++win) { | |
249 | /* again determining actual RAM size as in a3700_dram_init */ | |
250 | size = get_ram_size((void *)dram_wins[win].base, | |
251 | dram_wins[win].size); | |
252 | ||
253 | /* | |
254 | * Check if previous window ends as the current starts. If yes, | |
255 | * merge these windows into one "bank". This is possible by this | |
256 | * simple check thanks to mem_map regions being qsorted in | |
257 | * build_mem_map. | |
258 | */ | |
259 | if (last_end == dram_wins[win].base) { | |
260 | gd->bd->bi_dram[bank - 1].size += size; | |
261 | last_end += size; | |
262 | } else { | |
263 | if (bank == CONFIG_NR_DRAM_BANKS) { | |
264 | printf("Need more CONFIG_NR_DRAM_BANKS\n"); | |
265 | return -ENOBUFS; | |
266 | } | |
267 | ||
268 | gd->bd->bi_dram[bank].start = dram_wins[win].base; | |
269 | gd->bd->bi_dram[bank].size = size; | |
270 | last_end = dram_wins[win].base + size; | |
271 | ++bank; | |
272 | } | |
273 | } | |
274 | ||
275 | /* | |
276 | * If there is more place for DRAM BANKS definitions than needed, fill | |
277 | * the rest with zeros. | |
278 | */ | |
279 | for (; bank < CONFIG_NR_DRAM_BANKS; ++bank) { | |
280 | gd->bd->bi_dram[bank].start = 0; | |
281 | gd->bd->bi_dram[bank].size = 0; | |
282 | } | |
283 | ||
284 | return 0; | |
285 | } | |
286 | ||
cb2ddb29 MB |
287 | static u32 find_pcie_window_base(void) |
288 | { | |
289 | int win; | |
290 | ||
291 | for (win = 0; win < MVEBU_CPU_DEC_WINS; ++win) { | |
292 | u32 base, tgt; | |
293 | ||
294 | /* skip disabled windows */ | |
295 | if (get_cpu_dec_win(win, &tgt, &base, NULL)) | |
296 | continue; | |
297 | ||
298 | if (tgt == MVEBU_CPU_DEC_WIN_CTRL_TGT_PCIE) | |
299 | return base; | |
300 | } | |
301 | ||
302 | return -1; | |
303 | } | |
304 | ||
4a82fca8 T |
305 | static int fdt_setprop_inplace_u32_partial(void *blob, int node, |
306 | const char *name, | |
307 | u32 idx, u32 val) | |
308 | { | |
309 | val = cpu_to_fdt32(val); | |
310 | ||
311 | return fdt_setprop_inplace_namelen_partial(blob, node, name, | |
312 | strlen(name), | |
313 | idx * sizeof(u32), | |
314 | &val, sizeof(u32)); | |
315 | } | |
316 | ||
cb2ddb29 MB |
317 | int a3700_fdt_fix_pcie_regions(void *blob) |
318 | { | |
1fd54253 T |
319 | u32 base, lowest_cpu_addr, fix_offset; |
320 | int pci_cells, cpu_cells, size_cells; | |
cb2ddb29 | 321 | const u32 *ranges; |
4a82fca8 T |
322 | int node, pnode; |
323 | int ret, i, len; | |
324 | ||
325 | base = find_pcie_window_base(); | |
326 | if (base == -1) | |
327 | return -ENOENT; | |
cb2ddb29 | 328 | |
46b679e3 | 329 | node = fdt_node_offset_by_compatible(blob, -1, "marvell,armada-3700-pcie"); |
cb2ddb29 MB |
330 | if (node < 0) |
331 | return node; | |
332 | ||
333 | ranges = fdt_getprop(blob, node, "ranges", &len); | |
1fd54253 T |
334 | if (!ranges || !len || len % sizeof(u32)) |
335 | return -EINVAL; | |
cb2ddb29 | 336 | |
4a82fca8 T |
337 | /* |
338 | * The "ranges" property is an array of | |
1fd54253 T |
339 | * { <PCI address> <CPU address> <size in PCI address space> } |
340 | * where number of PCI address cells and size cells is stored in the | |
341 | * "#address-cells" and "#size-cells" properties of the same node | |
342 | * containing the "ranges" property and number of CPU address cells | |
343 | * is stored in the parent's "#address-cells" property. | |
4a82fca8 | 344 | * |
1fd54253 | 345 | * All 3 elements can span a diffent number of cells. Fetch them. |
4a82fca8 T |
346 | */ |
347 | pnode = fdt_parent_offset(blob, node); | |
1fd54253 T |
348 | pci_cells = fdt_address_cells(blob, node); |
349 | cpu_cells = fdt_address_cells(blob, pnode); | |
350 | size_cells = fdt_size_cells(blob, node); | |
cb2ddb29 | 351 | |
1fd54253 T |
352 | /* PCI addresses always use 3 cells */ |
353 | if (pci_cells != 3) | |
354 | return -EINVAL; | |
355 | ||
356 | /* CPU addresses on Armada 37xx always use 2 cells */ | |
357 | if (cpu_cells != 2) | |
358 | return -EINVAL; | |
359 | ||
360 | for (i = 0; i < len / sizeof(u32); | |
361 | i += pci_cells + cpu_cells + size_cells) { | |
362 | /* | |
363 | * Parent CPU addresses on Armada 37xx are always 32-bit, so | |
364 | * check that the high word is zero. | |
365 | */ | |
366 | if (fdt32_to_cpu(ranges[i + pci_cells])) | |
367 | return -EINVAL; | |
368 | ||
369 | if (i == 0 || | |
370 | fdt32_to_cpu(ranges[i + pci_cells + 1]) < lowest_cpu_addr) | |
371 | lowest_cpu_addr = fdt32_to_cpu(ranges[i + pci_cells + 1]); | |
372 | } | |
cb2ddb29 | 373 | |
1fd54253 T |
374 | /* Calculate fixup offset from the lowest (first) CPU address */ |
375 | fix_offset = base - lowest_cpu_addr; | |
cb2ddb29 | 376 | |
1fd54253 | 377 | /* If fixup offset is zero there is nothing to fix */ |
cbd7ef70 T |
378 | if (!fix_offset) |
379 | return 0; | |
380 | ||
4a82fca8 | 381 | /* |
1fd54253 T |
382 | * Fix each CPU address and corresponding PCI address if PCI address |
383 | * is not already remapped (has the same value) | |
4a82fca8 | 384 | */ |
1fd54253 T |
385 | for (i = 0; i < len / sizeof(u32); |
386 | i += pci_cells + cpu_cells + size_cells) { | |
387 | u32 cpu_addr; | |
388 | u64 pci_addr; | |
4a82fca8 T |
389 | int idx; |
390 | ||
1fd54253 T |
391 | /* Fix CPU address */ |
392 | idx = i + pci_cells + cpu_cells - 1; | |
393 | cpu_addr = fdt32_to_cpu(ranges[idx]); | |
4a82fca8 | 394 | ret = fdt_setprop_inplace_u32_partial(blob, node, "ranges", idx, |
1fd54253 | 395 | cpu_addr + fix_offset); |
4a82fca8 T |
396 | if (ret) |
397 | return ret; | |
398 | ||
1fd54253 T |
399 | /* Fix PCI address only if it isn't remapped (is same as CPU) */ |
400 | idx = i + pci_cells - 1; | |
401 | pci_addr = ((u64)fdt32_to_cpu(ranges[idx - 1]) << 32) | | |
402 | fdt32_to_cpu(ranges[idx]); | |
403 | if (cpu_addr != pci_addr) | |
404 | continue; | |
405 | ||
4a82fca8 | 406 | ret = fdt_setprop_inplace_u32_partial(blob, node, "ranges", idx, |
1fd54253 | 407 | cpu_addr + fix_offset); |
4a82fca8 T |
408 | if (ret) |
409 | return ret; | |
410 | } | |
cb2ddb29 | 411 | |
4a82fca8 | 412 | return 0; |
cb2ddb29 MB |
413 | } |
414 | ||
35b65dd8 | 415 | void reset_cpu(void) |
f61aefc1 SR |
416 | { |
417 | /* | |
418 | * Write magic number of 0x1d1e to North Bridge Warm Reset register | |
419 | * to trigger warm reset | |
420 | */ | |
421 | writel(MVEBU_NB_WARM_RST_MAGIC_NUM, MVEBU_NB_WARM_RST_REG); | |
422 | } | |
423 | ||
424 | /* | |
425 | * get_ref_clk | |
426 | * | |
427 | * return: reference clock in MHz (25 or 40) | |
428 | */ | |
429 | u32 get_ref_clk(void) | |
430 | { | |
431 | u32 regval; | |
432 | ||
433 | regval = (readl(MVEBU_TEST_PIN_LATCH_N) & MVEBU_XTAL_MODE_MASK) >> | |
434 | MVEBU_XTAL_MODE_OFFS; | |
435 | ||
436 | if (regval == MVEBU_XTAL_CLOCK_25MHZ) | |
437 | return 25; | |
438 | else | |
439 | return 40; | |
440 | } |