1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  *  Copyright (C) 2012-2017 Altera Corporation <www.altera.com>
4  */
5 
6 #include <common.h>
7 #include <asm/io.h>
8 #include <errno.h>
9 #include <fdtdec.h>
10 #include <linux/libfdt.h>
11 #include <altera.h>
12 #include <miiphy.h>
13 #include <netdev.h>
14 #include <watchdog.h>
15 #include <asm/arch/misc.h>
16 #include <asm/arch/reset_manager.h>
17 #include <asm/arch/scan_manager.h>
18 #include <asm/arch/sdram.h>
19 #include <asm/arch/system_manager.h>
20 #include <asm/arch/nic301.h>
21 #include <asm/arch/scu.h>
22 #include <asm/pl310.h>
23 
24 #include <dt-bindings/reset/altr,rst-mgr.h>
25 
26 DECLARE_GLOBAL_DATA_PTR;
27 
28 static struct pl310_regs *const pl310 =
29 	(struct pl310_regs *)CONFIG_SYS_PL310_BASE;
30 static struct socfpga_system_manager *sysmgr_regs =
31 	(struct socfpga_system_manager *)SOCFPGA_SYSMGR_ADDRESS;
32 static struct nic301_registers *nic301_regs =
33 	(struct nic301_registers *)SOCFPGA_L3REGS_ADDRESS;
34 static struct scu_registers *scu_regs =
35 	(struct scu_registers *)SOCFPGA_MPUSCU_ADDRESS;
36 
37 /*
38  * DesignWare Ethernet initialization
39  */
40 #ifdef CONFIG_ETH_DESIGNWARE
41 static void gen5_dwmac_reset(const u8 of_reset_id, const u8 phymode)
42 {
43 	u32 physhift, reset;
44 
45 	if (of_reset_id == EMAC0_RESET) {
46 		physhift = SYSMGR_EMACGRP_CTRL_PHYSEL0_LSB;
47 		reset = SOCFPGA_RESET(EMAC0);
48 	} else if (of_reset_id == EMAC1_RESET) {
49 		physhift = SYSMGR_EMACGRP_CTRL_PHYSEL1_LSB;
50 		reset = SOCFPGA_RESET(EMAC1);
51 	} else {
52 		printf("GMAC: Invalid reset ID (%i)!\n", of_reset_id);
53 		return;
54 	}
55 
56 	/* configure to PHY interface select choosed */
57 	clrsetbits_le32(&sysmgr_regs->emacgrp_ctrl,
58 			SYSMGR_EMACGRP_CTRL_PHYSEL_MASK << physhift,
59 			phymode << physhift);
60 
61 	/* Release the EMAC controller from reset */
62 	socfpga_per_reset(reset, 0);
63 }
64 
65 static int socfpga_eth_reset(void)
66 {
67 	/* Put all GMACs into RESET state. */
68 	socfpga_per_reset(SOCFPGA_RESET(EMAC0), 1);
69 	socfpga_per_reset(SOCFPGA_RESET(EMAC1), 1);
70 	return socfpga_eth_reset_common(gen5_dwmac_reset);
71 };
72 #else
73 static int socfpga_eth_reset(void)
74 {
75 	return 0;
76 };
77 #endif
78 
79 static const struct {
80 	const u16	pn;
81 	const char	*name;
82 	const char	*var;
83 } socfpga_fpga_model[] = {
84 	/* Cyclone V E */
85 	{ 0x2b15, "Cyclone V, E/A2", "cv_e_a2" },
86 	{ 0x2b05, "Cyclone V, E/A4", "cv_e_a4" },
87 	{ 0x2b22, "Cyclone V, E/A5", "cv_e_a5" },
88 	{ 0x2b13, "Cyclone V, E/A7", "cv_e_a7" },
89 	{ 0x2b14, "Cyclone V, E/A9", "cv_e_a9" },
90 	/* Cyclone V GX/GT */
91 	{ 0x2b01, "Cyclone V, GX/C3", "cv_gx_c3" },
92 	{ 0x2b12, "Cyclone V, GX/C4", "cv_gx_c4" },
93 	{ 0x2b02, "Cyclone V, GX/C5 or GT/D5", "cv_gx_c5" },
94 	{ 0x2b03, "Cyclone V, GX/C7 or GT/D7", "cv_gx_c7" },
95 	{ 0x2b04, "Cyclone V, GX/C9 or GT/D9", "cv_gx_c9" },
96 	/* Cyclone V SE/SX/ST */
97 	{ 0x2d11, "Cyclone V, SE/A2 or SX/C2", "cv_se_a2" },
98 	{ 0x2d01, "Cyclone V, SE/A4 or SX/C4", "cv_se_a4" },
99 	{ 0x2d12, "Cyclone V, SE/A5 or SX/C5 or ST/D5", "cv_se_a5" },
100 	{ 0x2d02, "Cyclone V, SE/A6 or SX/C6 or ST/D6", "cv_se_a6" },
101 	/* Arria V */
102 	{ 0x2d03, "Arria V, D5", "av_d5" },
103 };
104 
105 static int socfpga_fpga_id(const bool print_id)
106 {
107 	const u32 altera_mi = 0x6e;
108 	const u32 id = scan_mgr_get_fpga_id();
109 
110 	const u32 lsb = id & 0x00000001;
111 	const u32 mi = (id >> 1) & 0x000007ff;
112 	const u32 pn = (id >> 12) & 0x0000ffff;
113 	const u32 version = (id >> 28) & 0x0000000f;
114 	int i;
115 
116 	if ((mi != altera_mi) || (lsb != 1)) {
117 		printf("FPGA:  Not Altera chip ID\n");
118 		return -EINVAL;
119 	}
120 
121 	for (i = 0; i < ARRAY_SIZE(socfpga_fpga_model); i++)
122 		if (pn == socfpga_fpga_model[i].pn)
123 			break;
124 
125 	if (i == ARRAY_SIZE(socfpga_fpga_model)) {
126 		printf("FPGA:  Unknown Altera chip, ID 0x%08x\n", id);
127 		return -EINVAL;
128 	}
129 
130 	if (print_id)
131 		printf("FPGA:  Altera %s, version 0x%01x\n",
132 		       socfpga_fpga_model[i].name, version);
133 	return i;
134 }
135 
136 /*
137  * Print CPU information
138  */
139 #if defined(CONFIG_DISPLAY_CPUINFO)
140 int print_cpuinfo(void)
141 {
142 	const u32 bsel =
143 		SYSMGR_GET_BOOTINFO_BSEL(readl(&sysmgr_regs->bootinfo));
144 
145 	puts("CPU:   Altera SoCFPGA Platform\n");
146 	socfpga_fpga_id(1);
147 
148 	printf("BOOT:  %s\n", bsel_str[bsel].name);
149 	return 0;
150 }
151 #endif
152 
153 #ifdef CONFIG_ARCH_MISC_INIT
154 int arch_misc_init(void)
155 {
156 	const u32 bsel = readl(&sysmgr_regs->bootinfo) & 0x7;
157 	const int fpga_id = socfpga_fpga_id(0);
158 	env_set("bootmode", bsel_str[bsel].mode);
159 	if (fpga_id >= 0)
160 		env_set("fpgatype", socfpga_fpga_model[fpga_id].var);
161 	return socfpga_eth_reset();
162 }
163 #endif
164 
165 /*
166  * Convert all NIC-301 AMBA slaves from secure to non-secure
167  */
168 static void socfpga_nic301_slave_ns(void)
169 {
170 	writel(0x1, &nic301_regs->lwhps2fpgaregs);
171 	writel(0x1, &nic301_regs->hps2fpgaregs);
172 	writel(0x1, &nic301_regs->acp);
173 	writel(0x1, &nic301_regs->rom);
174 	writel(0x1, &nic301_regs->ocram);
175 	writel(0x1, &nic301_regs->sdrdata);
176 }
177 
178 static u32 iswgrp_handoff[8];
179 
180 int arch_early_init_r(void)
181 {
182 	int i;
183 
184 	/*
185 	 * Write magic value into magic register to unlock support for
186 	 * issuing warm reset. The ancient kernel code expects this
187 	 * value to be written into the register by the bootloader, so
188 	 * to support that old code, we write it here instead of in the
189 	 * reset_cpu() function just before resetting the CPU.
190 	 */
191 	writel(0xae9efebc, &sysmgr_regs->romcodegrp_warmramgrp_enable);
192 
193 	for (i = 0; i < 8; i++)	/* Cache initial SW setting regs */
194 		iswgrp_handoff[i] = readl(&sysmgr_regs->iswgrp_handoff[i]);
195 
196 	socfpga_bridges_reset(1);
197 
198 	socfpga_nic301_slave_ns();
199 
200 	/*
201 	 * Private components security:
202 	 * U-Boot : configure private timer, global timer and cpu component
203 	 * access as non secure for kernel stage (as required by Linux)
204 	 */
205 	setbits_le32(&scu_regs->sacr, 0xfff);
206 
207 	/* Configure the L2 controller to make SDRAM start at 0 */
208 	writel(0x1, &nic301_regs->remap);	/* remap.mpuzero */
209 	writel(0x1, &pl310->pl310_addr_filter_start);
210 
211 	/* Add device descriptor to FPGA device table */
212 	socfpga_fpga_add();
213 
214 #ifdef CONFIG_DESIGNWARE_SPI
215 	/* Get Designware SPI controller out of reset */
216 	socfpga_per_reset(SOCFPGA_RESET(SPIM0), 0);
217 	socfpga_per_reset(SOCFPGA_RESET(SPIM1), 0);
218 #endif
219 
220 #ifdef CONFIG_NAND_DENALI
221 	socfpga_per_reset(SOCFPGA_RESET(NAND), 0);
222 #endif
223 
224 	return 0;
225 }
226 
227 #ifndef CONFIG_SPL_BUILD
228 static struct socfpga_reset_manager *reset_manager_base =
229 	(struct socfpga_reset_manager *)SOCFPGA_RSTMGR_ADDRESS;
230 static struct socfpga_sdr_ctrl *sdr_ctrl =
231 	(struct socfpga_sdr_ctrl *)SDR_CTRLGRP_ADDRESS;
232 
233 static void socfpga_sdram_apply_static_cfg(void)
234 {
235 	const u32 applymask = 0x8;
236 	u32 val = readl(&sdr_ctrl->static_cfg) | applymask;
237 
238 	/*
239 	 * SDRAM staticcfg register specific:
240 	 * When applying the register setting, the CPU must not access
241 	 * SDRAM. Luckily for us, we can abuse i-cache here to help us
242 	 * circumvent the SDRAM access issue. The idea is to make sure
243 	 * that the code is in one full i-cache line by branching past
244 	 * it and back. Once it is in the i-cache, we execute the core
245 	 * of the code and apply the register settings.
246 	 *
247 	 * The code below uses 7 instructions, while the Cortex-A9 has
248 	 * 32-byte cachelines, thus the limit is 8 instructions total.
249 	 */
250 	asm volatile(
251 		".align	5			\n"
252 		"	b	2f		\n"
253 		"1:	str	%0,	[%1]	\n"
254 		"	dsb			\n"
255 		"	isb			\n"
256 		"	b	3f		\n"
257 		"2:	b	1b		\n"
258 		"3:	nop			\n"
259 	: : "r"(val), "r"(&sdr_ctrl->static_cfg) : "memory", "cc");
260 }
261 
262 void do_bridge_reset(int enable)
263 {
264 	if (enable) {
265 		writel(iswgrp_handoff[2], &sysmgr_regs->fpgaintfgrp_module);
266 		socfpga_sdram_apply_static_cfg();
267 		writel(iswgrp_handoff[3], &sdr_ctrl->fpgaport_rst);
268 		writel(iswgrp_handoff[0], &reset_manager_base->brg_mod_reset);
269 		writel(iswgrp_handoff[1], &nic301_regs->remap);
270 	} else {
271 		writel(0, &sysmgr_regs->fpgaintfgrp_module);
272 		writel(0, &sdr_ctrl->fpgaport_rst);
273 		socfpga_sdram_apply_static_cfg();
274 		writel(0, &reset_manager_base->brg_mod_reset);
275 		writel(1, &nic301_regs->remap);
276 	}
277 }
278 #endif
279