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| 1 | +// SPDX-License-Identifier: GPL-2.0-or-later |
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1 | 2 | /* |
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2 | 3 | * Copyright (C) 2012 Stefan Roese <sr@denx.de> |
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3 | | - * |
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4 | | - * This program is free software; you can redistribute it and/or modify |
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5 | | - * it under the terms of the GNU General Public License as published by |
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6 | | - * the Free Software Foundation; either version 2 of the License, or |
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7 | | - * (at your option) any later version. |
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8 | 4 | */ |
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9 | 5 | |
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10 | 6 | #include <linux/device.h> |
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.. | .. |
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71 | 67 | struct spi_device *spi = (struct spi_device *)context; |
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72 | 68 | struct fpga_data *data = spi_get_drvdata(spi); |
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73 | 69 | u8 *buffer; |
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74 | | - int ret; |
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75 | 70 | u8 txbuf[8]; |
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76 | 71 | u8 rxbuf[8]; |
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77 | 72 | int rx_len = 8; |
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.. | .. |
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96 | 91 | |
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97 | 92 | /* Trying to speak with the FPGA via SPI... */ |
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98 | 93 | txbuf[0] = FPGA_CMD_READ_ID; |
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99 | | - ret = spi_write_then_read(spi, txbuf, 8, rxbuf, rx_len); |
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| 94 | + spi_write_then_read(spi, txbuf, 8, rxbuf, rx_len); |
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100 | 95 | jedec_id = get_unaligned_be32(&rxbuf[4]); |
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101 | 96 | dev_dbg(&spi->dev, "FPGA JTAG ID=%08x\n", jedec_id); |
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102 | 97 | |
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.. | .. |
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114 | 109 | dev_info(&spi->dev, "FPGA %s detected\n", ecp3_dev[i].name); |
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115 | 110 | |
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116 | 111 | txbuf[0] = FPGA_CMD_READ_STATUS; |
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117 | | - ret = spi_write_then_read(spi, txbuf, 8, rxbuf, rx_len); |
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| 112 | + spi_write_then_read(spi, txbuf, 8, rxbuf, rx_len); |
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118 | 113 | status = get_unaligned_be32(&rxbuf[4]); |
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119 | 114 | dev_dbg(&spi->dev, "FPGA Status=%08x\n", status); |
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120 | 115 | |
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.. | .. |
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134 | 129 | memcpy(buffer + 4, fw->data, fw->size); |
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135 | 130 | |
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136 | 131 | txbuf[0] = FPGA_CMD_REFRESH; |
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137 | | - ret = spi_write(spi, txbuf, 4); |
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| 132 | + spi_write(spi, txbuf, 4); |
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138 | 133 | |
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139 | 134 | txbuf[0] = FPGA_CMD_WRITE_EN; |
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140 | | - ret = spi_write(spi, txbuf, 4); |
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| 135 | + spi_write(spi, txbuf, 4); |
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141 | 136 | |
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142 | 137 | txbuf[0] = FPGA_CMD_CLEAR; |
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143 | | - ret = spi_write(spi, txbuf, 4); |
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| 138 | + spi_write(spi, txbuf, 4); |
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144 | 139 | |
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145 | 140 | /* |
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146 | 141 | * Wait for FPGA memory to become cleared |
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147 | 142 | */ |
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148 | 143 | for (i = 0; i < FPGA_CLEAR_LOOP_COUNT; i++) { |
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149 | 144 | txbuf[0] = FPGA_CMD_READ_STATUS; |
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150 | | - ret = spi_write_then_read(spi, txbuf, 8, rxbuf, rx_len); |
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| 145 | + spi_write_then_read(spi, txbuf, 8, rxbuf, rx_len); |
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151 | 146 | status = get_unaligned_be32(&rxbuf[4]); |
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152 | 147 | if (status == FPGA_STATUS_CLEARED) |
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153 | 148 | break; |
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.. | .. |
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164 | 159 | } |
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165 | 160 | |
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166 | 161 | dev_info(&spi->dev, "Configuring the FPGA...\n"); |
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167 | | - ret = spi_write(spi, buffer, fw->size + 8); |
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| 162 | + spi_write(spi, buffer, fw->size + 8); |
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168 | 163 | |
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169 | 164 | txbuf[0] = FPGA_CMD_WRITE_DIS; |
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170 | | - ret = spi_write(spi, txbuf, 4); |
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| 165 | + spi_write(spi, txbuf, 4); |
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171 | 166 | |
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172 | 167 | txbuf[0] = FPGA_CMD_READ_STATUS; |
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173 | | - ret = spi_write_then_read(spi, txbuf, 8, rxbuf, rx_len); |
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| 168 | + spi_write_then_read(spi, txbuf, 8, rxbuf, rx_len); |
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174 | 169 | status = get_unaligned_be32(&rxbuf[4]); |
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175 | 170 | dev_dbg(&spi->dev, "FPGA Status=%08x\n", status); |
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176 | 171 | |
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