2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
13 #include <linux/kernel.h>
14 #include <linux/init.h>
15 #include <linux/module.h>
16 #include <linux/types.h>
17 #include <linux/device.h>
18 #include <linux/string.h>
19 #include <linux/slab.h>
21 #include <linux/platform_device.h>
23 #include <linux/delay.h>
25 #include <linux/firmware.h>
26 #include <asm/unaligned.h>
28 #include "gs_fpgaboot.h"
31 #define DEVICE_NAME "device"
32 #define CLASS_NAME "fpgaboot"
34 static u8 bits_magic[] = {
35 0x0, 0x9, 0xf, 0xf0, 0xf, 0xf0,
36 0xf, 0xf0, 0xf, 0xf0, 0x0, 0x0, 0x1};
38 /* fake device for request_firmware */
39 static struct platform_device *firmware_pdev;
41 static char *file = "xlinx_fpga_firmware.bit";
42 module_param(file, charp, 0444);
43 MODULE_PARM_DESC(file, "Xilinx FPGA firmware file.");
45 static void read_bitstream(u8 *bitdata, u8 *buf, int *offset, int rdsize)
47 memcpy(buf, bitdata + *offset, rdsize);
51 static int readinfo_bitstream(u8 *bitdata, u8 *buf, int size, int *offset)
56 /* read section char */
57 read_bitstream(bitdata, tbuf, offset, 1);
60 read_bitstream(bitdata, tbuf, offset, 2);
62 len = get_unaligned_be16(tbuf);
64 pr_err("error: readinfo buffer too small\n");
68 read_bitstream(bitdata, buf, offset, len);
77 static int readlength_bitstream(u8 *bitdata, int *lendata, int *offset)
81 /* read section char */
82 read_bitstream(bitdata, tbuf, offset, 1);
84 /* make sure it is section 'e' */
86 pr_err("error: length section is not 'e', but %c\n", tbuf[0]);
90 /* read 4bytes length */
91 read_bitstream(bitdata, tbuf, offset, 4);
93 *lendata = get_unaligned_be32(tbuf);
99 * read first 13 bytes to check bitstream magic number
101 static int readmagic_bitstream(u8 *bitdata, int *offset)
106 read_bitstream(bitdata, buf, offset, 13);
107 r = memcmp(buf, bits_magic, 13);
109 pr_err("error: corrupted header");
112 pr_info("bitstream file magic number Ok\n");
114 *offset = 13; /* magic length */
120 * NOTE: supports only bitstream format
122 static enum fmt_image get_imageformat(void)
127 static void gs_print_header(struct fpgaimage *fimage)
129 pr_info("file: %s\n", fimage->filename);
130 pr_info("part: %s\n", fimage->part);
131 pr_info("date: %s\n", fimage->date);
132 pr_info("time: %s\n", fimage->time);
133 pr_info("lendata: %d\n", fimage->lendata);
136 static int gs_read_bitstream(struct fpgaimage *fimage)
143 bitdata = (u8 *)fimage->fw_entry->data;
145 err = readmagic_bitstream(bitdata, &offset);
149 err = readinfo_bitstream(bitdata, fimage->filename, MAX_STR, &offset);
152 err = readinfo_bitstream(bitdata, fimage->part, MAX_STR, &offset);
155 err = readinfo_bitstream(bitdata, fimage->date, MAX_STR, &offset);
158 err = readinfo_bitstream(bitdata, fimage->time, MAX_STR, &offset);
162 err = readlength_bitstream(bitdata, &fimage->lendata, &offset);
166 fimage->fpgadata = bitdata + offset;
171 static int gs_read_image(struct fpgaimage *fimage)
176 img_fmt = get_imageformat();
180 pr_info("image is bitstream format\n");
181 err = gs_read_bitstream(fimage);
186 pr_err("unsupported fpga image format\n");
190 gs_print_header(fimage);
195 static int gs_load_image(struct fpgaimage *fimage, char *fw_file)
199 pr_info("load fpgaimage %s\n", fw_file);
201 err = request_firmware(&fimage->fw_entry, fw_file, &firmware_pdev->dev);
203 pr_err("firmware %s is missing, cannot continue.\n", fw_file);
210 static int gs_download_image(struct fpgaimage *fimage, enum wbus bus_bytes)
216 bitdata = (u8 *)fimage->fpgadata;
217 size = fimage->lendata;
220 print_hex_dump_bytes("bitfile sample: ", DUMP_PREFIX_OFFSET,
222 #endif /* DEBUG_FPGA */
223 if (!xl_supported_prog_bus_width(bus_bytes)) {
224 pr_err("unsupported program bus width %d\n",
229 /* Bring csi_b, rdwr_b Low and program_b High */
234 /* Configuration reset */
239 /* Wait for Device Initialization */
240 while (xl_get_init_b() == 0)
243 pr_info("device init done\n");
245 for (i = 0; i < size; i += bus_bytes)
246 xl_shift_bytes_out(bus_bytes, bitdata + i);
248 pr_info("program done\n");
251 if (xl_get_init_b() == 0) {
252 pr_err("init_b 0\n");
256 while (xl_get_done_b() == 0) {
257 if (cnt++ > MAX_WAIT_DONE) {
258 pr_err("init_B %d\n", xl_get_init_b());
263 if (cnt > MAX_WAIT_DONE) {
264 pr_err("fpga download fail\n");
268 pr_info("download fpgaimage\n");
270 /* Compensate for Special Startup Conditions */
276 static int gs_release_image(struct fpgaimage *fimage)
278 release_firmware(fimage->fw_entry);
279 pr_info("release fpgaimage\n");
285 * NOTE: supports systemmap parallel programming
287 static int gs_set_download_method(struct fpgaimage *fimage)
289 pr_info("set program method\n");
291 fimage->dmethod = m_systemmap;
293 pr_info("systemmap program method\n");
298 static int init_driver(void)
300 firmware_pdev = platform_device_register_simple("fpgaboot", -1,
302 return PTR_ERR_OR_ZERO(firmware_pdev);
305 static int gs_fpgaboot(void)
308 struct fpgaimage *fimage;
310 fimage = kmalloc(sizeof(*fimage), GFP_KERNEL);
314 err = gs_load_image(fimage, file);
316 pr_err("gs_load_image error\n");
320 err = gs_read_image(fimage);
322 pr_err("gs_read_image error\n");
326 err = gs_set_download_method(fimage);
328 pr_err("gs_set_download_method error\n");
332 err = gs_download_image(fimage, bus_2byte);
334 pr_err("gs_download_image error\n");
338 err = gs_release_image(fimage);
340 pr_err("gs_release_image error\n");
348 err = gs_release_image(fimage);
350 pr_err("gs_release_image error\n");
357 static int __init gs_fpgaboot_init(void)
361 pr_info("FPGA DOWNLOAD --->\n");
363 pr_info("FPGA image file name: %s\n", file);
367 pr_err("FPGA DRIVER INIT FAIL!!\n");
373 pr_err("GPIO INIT FAIL!!\n");
379 pr_err("FPGA DOWNLOAD FAIL!!\n");
383 pr_info("FPGA DOWNLOAD DONE <---\n");
388 platform_device_unregister(firmware_pdev);
393 static void __exit gs_fpgaboot_exit(void)
395 platform_device_unregister(firmware_pdev);
396 pr_info("FPGA image download module removed\n");
399 module_init(gs_fpgaboot_init);
400 module_exit(gs_fpgaboot_exit);
402 MODULE_AUTHOR("Insop Song");
403 MODULE_DESCRIPTION("Xlinix FPGA firmware download");
404 MODULE_LICENSE("GPL");