1 // SPDX-License-Identifier: BSD-3-Clause 2 /* 3 * Copyright (C) 2012 Altera Corporation <www.altera.com> 4 * All rights reserved. 5 */ 6 7 #include <common.h> 8 #include <asm/io.h> 9 #include <linux/errno.h> 10 #include <asm/arch/fpga_manager.h> 11 #include <asm/arch/reset_manager.h> 12 #include <asm/arch/system_manager.h> 13 14 #define FPGA_TIMEOUT_CNT 0x1000000 15 16 static struct socfpga_fpga_manager *fpgamgr_regs = 17 (struct socfpga_fpga_manager *)SOCFPGA_FPGAMGRREGS_ADDRESS; 18 static struct socfpga_system_manager *sysmgr_regs = 19 (struct socfpga_system_manager *)SOCFPGA_SYSMGR_ADDRESS; 20 21 /* Set CD ratio */ 22 static void fpgamgr_set_cd_ratio(unsigned long ratio) 23 { 24 clrsetbits_le32(&fpgamgr_regs->ctrl, 25 0x3 << FPGAMGRREGS_CTRL_CDRATIO_LSB, 26 (ratio & 0x3) << FPGAMGRREGS_CTRL_CDRATIO_LSB); 27 } 28 29 /* Start the FPGA programming by initialize the FPGA Manager */ 30 static int fpgamgr_program_init(void) 31 { 32 unsigned long msel, i; 33 34 /* Get the MSEL value */ 35 msel = readl(&fpgamgr_regs->stat); 36 msel &= FPGAMGRREGS_STAT_MSEL_MASK; 37 msel >>= FPGAMGRREGS_STAT_MSEL_LSB; 38 39 /* 40 * Set the cfg width 41 * If MSEL[3] = 1, cfg width = 32 bit 42 */ 43 if (msel & 0x8) { 44 setbits_le32(&fpgamgr_regs->ctrl, 45 FPGAMGRREGS_CTRL_CFGWDTH_MASK); 46 47 /* To determine the CD ratio */ 48 /* MSEL[1:0] = 0, CD Ratio = 1 */ 49 if ((msel & 0x3) == 0x0) 50 fpgamgr_set_cd_ratio(CDRATIO_x1); 51 /* MSEL[1:0] = 1, CD Ratio = 4 */ 52 else if ((msel & 0x3) == 0x1) 53 fpgamgr_set_cd_ratio(CDRATIO_x4); 54 /* MSEL[1:0] = 2, CD Ratio = 8 */ 55 else if ((msel & 0x3) == 0x2) 56 fpgamgr_set_cd_ratio(CDRATIO_x8); 57 58 } else { /* MSEL[3] = 0 */ 59 clrbits_le32(&fpgamgr_regs->ctrl, 60 FPGAMGRREGS_CTRL_CFGWDTH_MASK); 61 62 /* To determine the CD ratio */ 63 /* MSEL[1:0] = 0, CD Ratio = 1 */ 64 if ((msel & 0x3) == 0x0) 65 fpgamgr_set_cd_ratio(CDRATIO_x1); 66 /* MSEL[1:0] = 1, CD Ratio = 2 */ 67 else if ((msel & 0x3) == 0x1) 68 fpgamgr_set_cd_ratio(CDRATIO_x2); 69 /* MSEL[1:0] = 2, CD Ratio = 4 */ 70 else if ((msel & 0x3) == 0x2) 71 fpgamgr_set_cd_ratio(CDRATIO_x4); 72 } 73 74 /* To enable FPGA Manager configuration */ 75 clrbits_le32(&fpgamgr_regs->ctrl, FPGAMGRREGS_CTRL_NCE_MASK); 76 77 /* To enable FPGA Manager drive over configuration line */ 78 setbits_le32(&fpgamgr_regs->ctrl, FPGAMGRREGS_CTRL_EN_MASK); 79 80 /* Put FPGA into reset phase */ 81 setbits_le32(&fpgamgr_regs->ctrl, FPGAMGRREGS_CTRL_NCONFIGPULL_MASK); 82 83 /* (1) wait until FPGA enter reset phase */ 84 for (i = 0; i < FPGA_TIMEOUT_CNT; i++) { 85 if (fpgamgr_get_mode() == FPGAMGRREGS_MODE_RESETPHASE) 86 break; 87 } 88 89 /* If not in reset state, return error */ 90 if (fpgamgr_get_mode() != FPGAMGRREGS_MODE_RESETPHASE) { 91 puts("FPGA: Could not reset\n"); 92 return -1; 93 } 94 95 /* Release FPGA from reset phase */ 96 clrbits_le32(&fpgamgr_regs->ctrl, FPGAMGRREGS_CTRL_NCONFIGPULL_MASK); 97 98 /* (2) wait until FPGA enter configuration phase */ 99 for (i = 0; i < FPGA_TIMEOUT_CNT; i++) { 100 if (fpgamgr_get_mode() == FPGAMGRREGS_MODE_CFGPHASE) 101 break; 102 } 103 104 /* If not in configuration state, return error */ 105 if (fpgamgr_get_mode() != FPGAMGRREGS_MODE_CFGPHASE) { 106 puts("FPGA: Could not configure\n"); 107 return -2; 108 } 109 110 /* Clear all interrupts in CB Monitor */ 111 writel(0xFFF, &fpgamgr_regs->gpio_porta_eoi); 112 113 /* Enable AXI configuration */ 114 setbits_le32(&fpgamgr_regs->ctrl, FPGAMGRREGS_CTRL_AXICFGEN_MASK); 115 116 return 0; 117 } 118 119 /* Ensure the FPGA entering config done */ 120 static int fpgamgr_program_poll_cd(void) 121 { 122 const uint32_t mask = FPGAMGRREGS_MON_GPIO_EXT_PORTA_NS_MASK | 123 FPGAMGRREGS_MON_GPIO_EXT_PORTA_CD_MASK; 124 unsigned long reg, i; 125 126 /* (3) wait until full config done */ 127 for (i = 0; i < FPGA_TIMEOUT_CNT; i++) { 128 reg = readl(&fpgamgr_regs->gpio_ext_porta); 129 130 /* Config error */ 131 if (!(reg & mask)) { 132 printf("FPGA: Configuration error.\n"); 133 return -3; 134 } 135 136 /* Config done without error */ 137 if (reg & mask) 138 break; 139 } 140 141 /* Timeout happened, return error */ 142 if (i == FPGA_TIMEOUT_CNT) { 143 printf("FPGA: Timeout waiting for program.\n"); 144 return -4; 145 } 146 147 /* Disable AXI configuration */ 148 clrbits_le32(&fpgamgr_regs->ctrl, FPGAMGRREGS_CTRL_AXICFGEN_MASK); 149 150 return 0; 151 } 152 153 /* Ensure the FPGA entering init phase */ 154 static int fpgamgr_program_poll_initphase(void) 155 { 156 unsigned long i; 157 158 /* Additional clocks for the CB to enter initialization phase */ 159 if (fpgamgr_dclkcnt_set(0x4)) 160 return -5; 161 162 /* (4) wait until FPGA enter init phase or user mode */ 163 for (i = 0; i < FPGA_TIMEOUT_CNT; i++) { 164 if (fpgamgr_get_mode() == FPGAMGRREGS_MODE_INITPHASE) 165 break; 166 if (fpgamgr_get_mode() == FPGAMGRREGS_MODE_USERMODE) 167 break; 168 } 169 170 /* If not in configuration state, return error */ 171 if (i == FPGA_TIMEOUT_CNT) 172 return -6; 173 174 return 0; 175 } 176 177 /* Ensure the FPGA entering user mode */ 178 static int fpgamgr_program_poll_usermode(void) 179 { 180 unsigned long i; 181 182 /* Additional clocks for the CB to exit initialization phase */ 183 if (fpgamgr_dclkcnt_set(0x5000)) 184 return -7; 185 186 /* (5) wait until FPGA enter user mode */ 187 for (i = 0; i < FPGA_TIMEOUT_CNT; i++) { 188 if (fpgamgr_get_mode() == FPGAMGRREGS_MODE_USERMODE) 189 break; 190 } 191 /* If not in configuration state, return error */ 192 if (i == FPGA_TIMEOUT_CNT) 193 return -8; 194 195 /* To release FPGA Manager drive over configuration line */ 196 clrbits_le32(&fpgamgr_regs->ctrl, FPGAMGRREGS_CTRL_EN_MASK); 197 198 return 0; 199 } 200 201 /* 202 * FPGA Manager to program the FPGA. This is the interface used by FPGA driver. 203 * Return 0 for sucess, non-zero for error. 204 */ 205 int socfpga_load(Altera_desc *desc, const void *rbf_data, size_t rbf_size) 206 { 207 unsigned long status; 208 209 if ((uint32_t)rbf_data & 0x3) { 210 puts("FPGA: Unaligned data, realign to 32bit boundary.\n"); 211 return -EINVAL; 212 } 213 214 /* Prior programming the FPGA, all bridges need to be shut off */ 215 216 /* Disable all signals from hps peripheral controller to fpga */ 217 writel(0, &sysmgr_regs->fpgaintfgrp_module); 218 219 /* Disable all signals from FPGA to HPS SDRAM */ 220 #define SDR_CTRLGRP_FPGAPORTRST_ADDRESS 0x5080 221 writel(0, SOCFPGA_SDR_ADDRESS + SDR_CTRLGRP_FPGAPORTRST_ADDRESS); 222 223 /* Disable all axi bridge (hps2fpga, lwhps2fpga & fpga2hps) */ 224 socfpga_bridges_reset(1); 225 226 /* Unmap the bridges from NIC-301 */ 227 writel(0x1, SOCFPGA_L3REGS_ADDRESS); 228 229 /* Initialize the FPGA Manager */ 230 status = fpgamgr_program_init(); 231 if (status) 232 return status; 233 234 /* Write the RBF data to FPGA Manager */ 235 fpgamgr_program_write(rbf_data, rbf_size); 236 237 /* Ensure the FPGA entering config done */ 238 status = fpgamgr_program_poll_cd(); 239 if (status) 240 return status; 241 242 /* Ensure the FPGA entering init phase */ 243 status = fpgamgr_program_poll_initphase(); 244 if (status) 245 return status; 246 247 /* Ensure the FPGA entering user mode */ 248 return fpgamgr_program_poll_usermode(); 249 } 250