1 /*
2  * Copyright 2007,2009-2014 Freescale Semiconductor, Inc.
3  *
4  * SPDX-License-Identifier:	GPL-2.0+
5  */
6 
7 #include <common.h>
8 #include <command.h>
9 #include <pci.h>
10 #include <asm/processor.h>
11 #include <asm/mmu.h>
12 #include <asm/fsl_pci.h>
13 #include <asm/io.h>
14 #include <libfdt.h>
15 #include <fdt_support.h>
16 #include <netdev.h>
17 #include <fdtdec.h>
18 #include <errno.h>
19 #include <malloc.h>
20 
21 DECLARE_GLOBAL_DATA_PTR;
22 
23 static void *get_fdt_virt(void)
24 {
25 	return (void *)CONFIG_SYS_TMPVIRT;
26 }
27 
28 static uint64_t get_fdt_phys(void)
29 {
30 	return (uint64_t)(uintptr_t)gd->fdt_blob;
31 }
32 
33 static void map_fdt_as(int esel)
34 {
35 	u32 mas0, mas1, mas2, mas3, mas7;
36 	uint64_t fdt_phys = get_fdt_phys();
37 	unsigned long fdt_phys_tlb = fdt_phys & ~0xffffful;
38 	unsigned long fdt_virt_tlb = (ulong)get_fdt_virt() & ~0xffffful;
39 
40 	mas0 = MAS0_TLBSEL(1) | MAS0_ESEL(esel);
41 	mas1 = MAS1_VALID | MAS1_TID(0) | MAS1_TS | MAS1_TSIZE(BOOKE_PAGESZ_1M);
42 	mas2 = FSL_BOOKE_MAS2(fdt_virt_tlb, 0);
43 	mas3 = FSL_BOOKE_MAS3(fdt_phys_tlb, 0, MAS3_SW|MAS3_SR);
44 	mas7 = FSL_BOOKE_MAS7(fdt_phys_tlb);
45 
46 	write_tlb(mas0, mas1, mas2, mas3, mas7);
47 }
48 
49 uint64_t get_phys_ccsrbar_addr_early(void)
50 {
51 	void *fdt = get_fdt_virt();
52 	uint64_t r;
53 
54 	/*
55 	 * To be able to read the FDT we need to create a temporary TLB
56 	 * map for it.
57 	 */
58 	map_fdt_as(10);
59 	r = fdt_get_base_address(fdt, fdt_path_offset(fdt, "/soc"));
60 	disable_tlb(10);
61 
62 	return r;
63 }
64 
65 int board_early_init_f(void)
66 {
67 	return 0;
68 }
69 
70 int checkboard(void)
71 {
72 	return 0;
73 }
74 
75 static int pci_map_region(void *fdt, int pci_node, int range_id,
76 			  phys_size_t *ppaddr, pci_addr_t *pvaddr,
77 			  pci_size_t *psize, ulong *pmap_addr)
78 {
79 	uint64_t addr;
80 	uint64_t size;
81 	ulong map_addr;
82 	int r;
83 
84 	r = fdt_read_range(fdt, pci_node, 0, NULL, &addr, &size);
85 	if (r)
86 		return r;
87 
88 	if (ppaddr)
89 		*ppaddr = addr;
90 	if (psize)
91 		*psize = size;
92 
93 	if (!pmap_addr)
94 		return 0;
95 
96 	map_addr = *pmap_addr;
97 
98 	/* Align map_addr */
99 	map_addr += size - 1;
100 	map_addr &= ~(size - 1);
101 
102 	if (map_addr + size >= CONFIG_SYS_PCI_MAP_END)
103 		return -1;
104 
105 	/* Map virtual memory for range */
106 	assert(!tlb_map_range(map_addr, addr, size, TLB_MAP_IO));
107 	*pmap_addr = map_addr + size;
108 
109 	if (pvaddr)
110 		*pvaddr = map_addr;
111 
112 	return 0;
113 }
114 
115 void pci_init_board(void)
116 {
117 	struct pci_controller *pci_hoses;
118 	void *fdt = get_fdt_virt();
119 	int pci_node = -1;
120 	int pci_num = 0;
121 	int pci_count = 0;
122 	ulong map_addr;
123 
124 	puts("\n");
125 
126 	/* Start MMIO and PIO range maps above RAM */
127 	map_addr = CONFIG_SYS_PCI_MAP_START;
128 
129 	/* Count and allocate PCI buses */
130 	pci_node = fdt_node_offset_by_prop_value(fdt, pci_node,
131 			"device_type", "pci", 4);
132 	while (pci_node != -FDT_ERR_NOTFOUND) {
133 		pci_node = fdt_node_offset_by_prop_value(fdt, pci_node,
134 				"device_type", "pci", 4);
135 		pci_count++;
136 	}
137 
138 	if (pci_count) {
139 		pci_hoses = malloc(sizeof(struct pci_controller) * pci_count);
140 	} else {
141 		printf("PCI: disabled\n\n");
142 		return;
143 	}
144 
145 	/* Spawn PCI buses based on device tree */
146 	pci_node = fdt_node_offset_by_prop_value(fdt, pci_node,
147 			"device_type", "pci", 4);
148 	while (pci_node != -FDT_ERR_NOTFOUND) {
149 		struct fsl_pci_info pci_info = { };
150 		const fdt32_t *reg;
151 		int r;
152 
153 		reg = fdt_getprop(fdt, pci_node, "reg", NULL);
154 		pci_info.regs = fdt_translate_address(fdt, pci_node, reg);
155 
156 		/* Map MMIO range */
157 		r = pci_map_region(fdt, pci_node, 0, &pci_info.mem_phys, NULL,
158 				   &pci_info.mem_size, &map_addr);
159 		if (r)
160 			break;
161 
162 		/* Map PIO range */
163 		r = pci_map_region(fdt, pci_node, 1, &pci_info.io_phys, NULL,
164 				   &pci_info.io_size, &map_addr);
165 		if (r)
166 			break;
167 
168 		/*
169 		 * The PCI framework finds virtual addresses for the buses
170 		 * through our address map, so tell it the physical addresses.
171 		 */
172 		pci_info.mem_bus = pci_info.mem_phys;
173 		pci_info.io_bus = pci_info.io_phys;
174 
175 		/* Instantiate */
176 		pci_info.pci_num = pci_num + 1;
177 
178 		fsl_setup_hose(&pci_hoses[pci_num], pci_info.regs);
179 		printf("PCI: base address %lx\n", pci_info.regs);
180 
181 		fsl_pci_init_port(&pci_info, &pci_hoses[pci_num], pci_num);
182 
183 		/* Jump to next PCI node */
184 		pci_node = fdt_node_offset_by_prop_value(fdt, pci_node,
185 				"device_type", "pci", 4);
186 		pci_num++;
187 	}
188 
189 	puts("\n");
190 }
191 
192 int last_stage_init(void)
193 {
194 	void *fdt = get_fdt_virt();
195 	int len = 0;
196 	const uint64_t *prop;
197 	int chosen;
198 
199 	chosen = fdt_path_offset(fdt, "/chosen");
200 	if (chosen < 0) {
201 		printf("Couldn't find /chosen node in fdt\n");
202 		return -EIO;
203 	}
204 
205 	/* -kernel boot */
206 	prop = fdt_getprop(fdt, chosen, "qemu,boot-kernel", &len);
207 	if (prop && (len >= 8))
208 		setenv_hex("qemu_kernel_addr", *prop);
209 
210 	/* Give the user a variable for the host fdt */
211 	setenv_hex("fdt_addr_r", (ulong)fdt);
212 
213 	return 0;
214 }
215 
216 static uint64_t get_linear_ram_size(void)
217 {
218 	void *fdt = get_fdt_virt();
219 	const void *prop;
220 	int memory;
221 	int len;
222 
223 	memory = fdt_path_offset(fdt, "/memory");
224 	prop = fdt_getprop(fdt, memory, "reg", &len);
225 
226 	if (prop && len >= 16)
227 		return *(uint64_t *)(prop+8);
228 
229 	panic("Couldn't determine RAM size");
230 }
231 
232 int board_eth_init(bd_t *bis)
233 {
234 	return pci_eth_init(bis);
235 }
236 
237 #if defined(CONFIG_OF_BOARD_SETUP)
238 int ft_board_setup(void *blob, bd_t *bd)
239 {
240 	FT_FSL_PCI_SETUP;
241 
242 	return 0;
243 }
244 #endif
245 
246 void print_laws(void)
247 {
248 	/* We don't emulate LAWs yet */
249 }
250 
251 phys_size_t fixed_sdram(void)
252 {
253 	return get_linear_ram_size();
254 }
255 
256 phys_size_t fsl_ddr_sdram_size(void)
257 {
258 	return get_linear_ram_size();
259 }
260 
261 void init_tlbs(void)
262 {
263 	phys_size_t ram_size;
264 
265 	/*
266 	 * Create a temporary AS=1 map for the fdt
267 	 *
268 	 * We use ESEL=0 here to overwrite the previous AS=0 map for ourselves
269 	 * which was only 4k big. This way we don't have to clear any other maps.
270 	 */
271 	map_fdt_as(0);
272 
273 	/* Fetch RAM size from the fdt */
274 	ram_size = get_linear_ram_size();
275 
276 	/* And remove our fdt map again */
277 	disable_tlb(0);
278 
279 	/* Create an internal map of manually created TLB maps */
280 	init_used_tlb_cams();
281 
282 	/* Create a dynamic AS=0 CCSRBAR mapping */
283 	assert(!tlb_map_range(CONFIG_SYS_CCSRBAR, CONFIG_SYS_CCSRBAR_PHYS,
284 			      1024 * 1024, TLB_MAP_IO));
285 
286 	/* Create a RAM map that spans all accessible RAM */
287 	setup_ddr_tlbs(ram_size >> 20);
288 
289 	/* Create a map for the TLB */
290 	assert(!tlb_map_range((ulong)get_fdt_virt(), get_fdt_phys(),
291 			      1024 * 1024, TLB_MAP_RAM));
292 }
293 
294 void init_laws(void)
295 {
296 	/* We don't emulate LAWs yet */
297 }
298 
299 static uint32_t get_cpu_freq(void)
300 {
301 	void *fdt = get_fdt_virt();
302 	int cpus_node = fdt_path_offset(fdt, "/cpus");
303 	int cpu_node = fdt_first_subnode(fdt, cpus_node);
304 	const char *prop = "clock-frequency";
305 	return fdt_getprop_u32_default_node(fdt, cpu_node, 0, prop, 0);
306 }
307 
308 void get_sys_info(sys_info_t *sys_info)
309 {
310 	int freq = get_cpu_freq();
311 
312 	memset(sys_info, 0, sizeof(sys_info_t));
313 	sys_info->freq_systembus = freq;
314 	sys_info->freq_ddrbus = freq;
315 	sys_info->freq_processor[0] = freq;
316 }
317 
318 int get_clocks (void)
319 {
320 	sys_info_t sys_info;
321 
322 	get_sys_info(&sys_info);
323 
324 	gd->cpu_clk = sys_info.freq_processor[0];
325 	gd->bus_clk = sys_info.freq_systembus;
326 	gd->mem_clk = sys_info.freq_ddrbus;
327 	gd->arch.lbc_clk = sys_info.freq_ddrbus;
328 
329 	return 0;
330 }
331 
332 unsigned long get_tbclk (void)
333 {
334 	void *fdt = get_fdt_virt();
335 	int cpus_node = fdt_path_offset(fdt, "/cpus");
336 	int cpu_node = fdt_first_subnode(fdt, cpus_node);
337 	const char *prop = "timebase-frequency";
338 	return fdt_getprop_u32_default_node(fdt, cpu_node, 0, prop, 0);
339 }
340 
341 /********************************************
342  * get_bus_freq
343  * return system bus freq in Hz
344  *********************************************/
345 ulong get_bus_freq (ulong dummy)
346 {
347 	sys_info_t sys_info;
348 	get_sys_info(&sys_info);
349 	return sys_info.freq_systembus;
350 }
351 
352 /*
353  * Return the number of cores on this SOC.
354  */
355 int cpu_numcores(void)
356 {
357 	/*
358 	 * The QEMU u-boot target only needs to drive the first core,
359 	 * spinning and device tree nodes get driven by QEMU itself
360 	 */
361 	return 1;
362 }
363 
364 /*
365  * Return a 32-bit mask indicating which cores are present on this SOC.
366  */
367 u32 cpu_mask(void)
368 {
369 	return (1 << cpu_numcores()) - 1;
370 }
371