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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