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Sergey Kostanbaev7237d222014-06-25 23:44:29 +04001/*
2 * Board initialization for EP93xx
3 *
4 * Copyright (C) 2013
5 * Sergey Kostanbaev <sergey.kostanbaev <at> fairwaves.ru>
6 *
7 * Copyright (C) 2009
8 * Matthias Kaehlcke <matthias <at> kaehlcke.net>
9 *
10 * (C) Copyright 2002 2003
11 * Network Audio Technologies, Inc. <www.netaudiotech.com>
12 * Adam Bezanson <bezanson <at> netaudiotech.com>
13 *
14 * SPDX-License-Identifier: GPL-2.0+
15 */
16
17#include <config.h>
18#include <common.h>
19#include <netdev.h>
20#include <asm/io.h>
21#include <asm/arch/ep93xx.h>
22
23DECLARE_GLOBAL_DATA_PTR;
24
25/*
26 * usb_div: 4, nbyp2: 1, pll2_en: 1
27 * pll2_x1: 368640000.000000, pll2_x2ip: 15360000.000000,
28 * pll2_x2: 384000000.000000, pll2_out: 192000000.000000
29 */
30#define CLKSET2_VAL (23 << SYSCON_CLKSET_PLL_X2IPD_SHIFT | \
31 24 << SYSCON_CLKSET_PLL_X2FBD2_SHIFT | \
32 24 << SYSCON_CLKSET_PLL_X1FBD1_SHIFT | \
33 1 << SYSCON_CLKSET_PLL_PS_SHIFT | \
34 SYSCON_CLKSET2_PLL2_EN | \
35 SYSCON_CLKSET2_NBYP2 | \
36 3 << SYSCON_CLKSET2_USB_DIV_SHIFT)
37
38#define SMC_BCR6_VALUE (2 << SMC_BCR_IDCY_SHIFT | 5 << SMC_BCR_WST1_SHIFT | \
39 SMC_BCR_BLE | 2 << SMC_BCR_WST2_SHIFT | \
40 1 << SMC_BCR_MW_SHIFT)
41
42/* delay execution before timers are initialized */
43static inline void early_udelay(uint32_t usecs)
44{
45 /* loop takes 4 cycles at 5.0ns (fastest case, running at 200MHz) */
46 register uint32_t loops = (usecs * 1000) / 20;
47
48 __asm__ volatile ("1:\n"
49 "subs %0, %1, #1\n"
50 "bne 1b" : "=r" (loops) : "0" (loops));
51}
52
53#ifndef CONFIG_EP93XX_NO_FLASH_CFG
54static void flash_cfg(void)
55{
56 struct smc_regs *smc = (struct smc_regs *)SMC_BASE;
57
58 writel(SMC_BCR6_VALUE, &smc->bcr6);
59}
60#else
61#define flash_cfg()
62#endif
63
64int board_init(void)
65{
66 /*
67 * Setup PLL2, PPL1 has been set during lowlevel init
68 */
69 struct syscon_regs *syscon = (struct syscon_regs *)SYSCON_BASE;
70 writel(CLKSET2_VAL, &syscon->clkset2);
71
72 /*
73 * the user's guide recommends to wait at least 1 ms for PLL2 to
74 * stabilize
75 */
76 early_udelay(1000);
77
78 /* Go to Async mode */
79 __asm__ volatile ("mrc p15, 0, r0, c1, c0, 0");
80 __asm__ volatile ("orr r0, r0, #0xc0000000");
81 __asm__ volatile ("mcr p15, 0, r0, c1, c0, 0");
82
83 icache_enable();
84
85#ifdef USE_920T_MMU
86 dcache_enable();
87#endif
88
89 /* Machine number, as defined in linux/arch/arm/tools/mach-types */
90 gd->bd->bi_arch_number = CONFIG_MACH_TYPE;
91
92 /* adress of boot parameters */
93 gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR;
94
95 /* We have a console */
96 gd->have_console = 1;
97
98 enable_interrupts();
99
100 flash_cfg();
101
102 green_led_on();
103 red_led_off();
104
105 return 0;
106}
107
108int board_early_init_f(void)
109{
110 /*
111 * set UARTBAUD bit to drive UARTs with 14.7456MHz instead of
112 * 14.7456/2 MHz
113 */
114 struct syscon_regs *syscon = (struct syscon_regs *)SYSCON_BASE;
115 writel(SYSCON_PWRCNT_UART_BAUD, &syscon->pwrcnt);
116 return 0;
117}
118
119int board_eth_init(bd_t *bd)
120{
121 return ep93xx_eth_initialize(0, MAC_BASE);
122}
123
124static void dram_fill_bank_addr(unsigned dram_addr_mask, unsigned dram_bank_cnt,
125 unsigned dram_bank_base[CONFIG_NR_DRAM_BANKS])
126{
127 if (dram_bank_cnt == 1) {
128 dram_bank_base[0] = PHYS_SDRAM_1;
129 } else {
130 /* Table lookup for holes in address space. Maximum memory
131 * for the single SDCS may be up to 256Mb. We start scanning
132 * banks from 1Mb, so it could be up to 128 banks theoretically.
133 * We need at maximum 7 bits for the loockup, 8 slots is
134 * enough for the worst case.
135 */
136 unsigned tbl[8];
137 unsigned i = dram_bank_cnt / 2;
138 unsigned j = 0x00100000; /* 1 Mb */
139 unsigned *ptbl = tbl;
140 do {
141 while (!(dram_addr_mask & j)) {
142 j <<= 1;
143 }
144 *ptbl++ = j;
145 j <<= 1;
146 i >>= 1;
147 } while (i != 0);
148
149 for (i = dram_bank_cnt, j = 0;
150 (i != 0) && (j < CONFIG_NR_DRAM_BANKS); --i, ++j) {
151 unsigned addr = PHYS_SDRAM_1;
152 unsigned k;
153 unsigned bit;
154
155 for (k = 0, bit = 1; k < 8; k++, bit <<= 1) {
156 if (bit & j)
157 addr |= tbl[k];
158 }
159
160 dram_bank_base[j] = addr;
161 }
162 }
163}
164
165/* called in board_init_f (before relocation) */
166static unsigned dram_init_banksize_int(int print)
167{
168 /*
169 * Collect information of banks that has been filled during lowlevel
170 * initialization
171 */
172 unsigned i;
173 unsigned dram_bank_base[CONFIG_NR_DRAM_BANKS];
174 unsigned dram_total = 0;
175 unsigned dram_bank_size = *(unsigned *)
176 (PHYS_SDRAM_1 | UBOOT_MEMORYCNF_BANK_SIZE);
177 unsigned dram_addr_mask = *(unsigned *)
178 (PHYS_SDRAM_1 | UBOOT_MEMORYCNF_BANK_MASK);
179 unsigned dram_bank_cnt = *(unsigned *)
180 (PHYS_SDRAM_1 | UBOOT_MEMORYCNF_BANK_COUNT);
181
182 dram_fill_bank_addr(dram_addr_mask, dram_bank_cnt, dram_bank_base);
183
184 for (i = 0; i < dram_bank_cnt; i++) {
185 gd->bd->bi_dram[i].start = dram_bank_base[i];
186 gd->bd->bi_dram[i].size = dram_bank_size;
187 dram_total += dram_bank_size;
188 }
189 for (; i < CONFIG_NR_DRAM_BANKS; i++) {
190 gd->bd->bi_dram[i].start = 0;
191 gd->bd->bi_dram[i].size = 0;
192 }
193
194 if (print) {
195 printf("DRAM mask: %08x\n", dram_addr_mask);
196 printf("DRAM total %u banks:\n", dram_bank_cnt);
197 printf("bank base-address size\n");
198
199 if (dram_bank_cnt > CONFIG_NR_DRAM_BANKS) {
200 printf("WARNING! UBoot was configured for %u banks,\n"
201 "but %u has been found. "
202 "Supressing extra memory banks\n",
203 CONFIG_NR_DRAM_BANKS, dram_bank_cnt);
204 dram_bank_cnt = CONFIG_NR_DRAM_BANKS;
205 }
206
207 for (i = 0; i < dram_bank_cnt; i++) {
208 printf(" %u %08x %08x\n",
209 i, dram_bank_base[i], dram_bank_size);
210 }
211 printf(" ------------------------------------------\n"
212 "Total %9d\n\n",
213 dram_total);
214 }
215
216 return dram_total;
217}
218
Simon Glass76b00ac2017-03-31 08:40:32 -0600219int dram_init_banksize(void)
Sergey Kostanbaev7237d222014-06-25 23:44:29 +0400220{
221 dram_init_banksize_int(0);
Simon Glass76b00ac2017-03-31 08:40:32 -0600222
223 return 0;
Sergey Kostanbaev7237d222014-06-25 23:44:29 +0400224}
225
226/* called in board_init_f (before relocation) */
227int dram_init(void)
228{
229 struct syscon_regs *syscon = (struct syscon_regs *)SYSCON_BASE;
230 unsigned sec_id = readl(SECURITY_EXTENSIONID);
231 unsigned chip_id = readl(&syscon->chipid);
232
233 printf("CPU: Cirrus Logic ");
234 switch (sec_id & 0x000001FE) {
235 case 0x00000008:
236 printf("EP9301");
237 break;
238 case 0x00000004:
239 printf("EP9307");
240 break;
241 case 0x00000002:
242 printf("EP931x");
243 break;
244 case 0x00000000:
245 printf("EP9315");
246 break;
247 default:
248 printf("<unknown>");
249 break;
250 }
251
252 printf(" - Rev. ");
253 switch (chip_id & 0xF0000000) {
254 case 0x00000000:
255 printf("A");
256 break;
257 case 0x10000000:
258 printf("B");
259 break;
260 case 0x20000000:
261 printf("C");
262 break;
263 case 0x30000000:
264 printf("D0");
265 break;
266 case 0x40000000:
267 printf("D1");
268 break;
269 case 0x50000000:
270 printf("E0");
271 break;
272 case 0x60000000:
273 printf("E1");
274 break;
275 case 0x70000000:
276 printf("E2");
277 break;
278 default:
279 printf("?");
280 break;
281 }
282 printf(" (SecExtID=%.8x/ChipID=%.8x)\n", sec_id, chip_id);
283
284 gd->ram_size = dram_init_banksize_int(1);
285 return 0;
286}