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.
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 #include <linux/kernel.h>
18 #include <linux/init.h>
19 #include <linux/module.h>
20 #include <linux/types.h>
21 #include <linux/device.h>
22 #include <linux/string.h>
23 #include <linux/slab.h>
25 #include <linux/platform_device.h>
27 #include <linux/delay.h>
29 #include <linux/firmware.h>
31 #include "gs_fpgaboot.h"
34 #define DEVICE_NAME "device"
35 #define CLASS_NAME "fpgaboot"
37 static uint8_t bits_magic[] = {
38 0x0, 0x9, 0xf, 0xf0, 0xf, 0xf0,
39 0xf, 0xf0, 0xf, 0xf0, 0x0, 0x0, 0x1};
41 /* fake device for request_firmware */
42 static struct platform_device *firmware_pdev;
44 static char *file = "xlinx_fpga_firmware.bit";
45 module_param(file, charp, S_IRUGO);
46 MODULE_PARM_DESC(file, "Xilinx FPGA firmware file.");
48 static void read_bitstream(char *bitdata, char *buf, int *offset, int rdsize)
50 memcpy(buf, bitdata + *offset, rdsize);
54 static void readinfo_bitstream(char *bitdata, char *buf, int *offset)
59 /* read section char */
60 read_bitstream(bitdata, tbuf, offset, 1);
63 read_bitstream(bitdata, tbuf, offset, 2);
65 len = tbuf[0] << 8 | tbuf[1];
67 read_bitstream(bitdata, buf, offset, len);
74 static int readlength_bitstream(char *bitdata, int *lendata, int *offset)
78 /* read section char */
79 read_bitstream(bitdata, tbuf, offset, 1);
81 /* make sure it is section 'e' */
83 pr_err("error: length section is not 'e', but %c\n", tbuf[0]);
87 /* read 4bytes length */
88 read_bitstream(bitdata, tbuf, offset, 4);
90 *lendata = tbuf[0] << 24 | tbuf[1] << 16 |
91 tbuf[2] << 8 | tbuf[3];
98 * read first 13 bytes to check bitstream magic number
100 static int readmagic_bitstream(char *bitdata, int *offset)
105 read_bitstream(bitdata, buf, offset, 13);
106 r = memcmp(buf, bits_magic, 13);
108 pr_err("error: corrupted header");
111 pr_info("bitstream file magic number Ok\n");
113 *offset = 13; /* magic length */
119 * NOTE: supports only bitstream format
121 static enum fmt_image get_imageformat(struct fpgaimage *fimage)
126 static void gs_print_header(struct fpgaimage *fimage)
128 pr_info("file: %s\n", fimage->filename);
129 pr_info("part: %s\n", fimage->part);
130 pr_info("date: %s\n", fimage->date);
131 pr_info("time: %s\n", fimage->time);
132 pr_info("lendata: %d\n", fimage->lendata);
135 static void gs_read_bitstream(struct fpgaimage *fimage)
141 bitdata = (char *)fimage->fw_entry->data;
143 readmagic_bitstream(bitdata, &offset);
144 readinfo_bitstream(bitdata, fimage->filename, &offset);
145 readinfo_bitstream(bitdata, fimage->part, &offset);
146 readinfo_bitstream(bitdata, fimage->date, &offset);
147 readinfo_bitstream(bitdata, fimage->time, &offset);
148 readlength_bitstream(bitdata, &fimage->lendata, &offset);
150 fimage->fpgadata = bitdata + offset;
153 static int gs_read_image(struct fpgaimage *fimage)
157 img_fmt = get_imageformat(fimage);
161 pr_info("image is bitstream format\n");
162 gs_read_bitstream(fimage);
165 pr_err("unsupported fpga image format\n");
169 gs_print_header(fimage);
174 static int gs_load_image(struct fpgaimage *fimage, char *fw_file)
178 pr_info("load fpgaimage %s\n", fw_file);
180 err = request_firmware(&fimage->fw_entry, fw_file, &firmware_pdev->dev);
182 pr_err("firmware %s is missing, cannot continue.\n", fw_file);
189 static int gs_download_image(struct fpgaimage *fimage, enum wbus bus_bytes)
195 bitdata = (char *)fimage->fpgadata;
196 size = fimage->lendata;
199 print_hex_dump_bytes("bitfile sample: ", DUMP_PREFIX_OFFSET,
201 #endif /* DEBUG_FPGA */
202 if (!xl_supported_prog_bus_width(bus_bytes)) {
203 pr_err("unsupported program bus width %d\n",
208 /* Bring csi_b, rdwr_b Low and program_b High */
213 /* Configuration reset */
218 /* Wait for Device Initialization */
219 while (xl_get_init_b() == 0)
222 pr_info("device init done\n");
224 for (i = 0; i < size; i += bus_bytes)
225 xl_shift_bytes_out(bus_bytes, bitdata+i);
227 pr_info("program done\n");
230 if (xl_get_init_b() == 0) {
231 pr_err("init_b 0\n");
235 while (xl_get_done_b() == 0) {
236 if (cnt++ > MAX_WAIT_DONE) {
237 pr_err("init_B %d\n", xl_get_init_b());
242 if (cnt > MAX_WAIT_DONE) {
243 pr_err("fpga download fail\n");
247 pr_info("download fpgaimage\n");
249 /* Compensate for Special Startup Conditions */
255 static int gs_release_image(struct fpgaimage *fimage)
257 release_firmware(fimage->fw_entry);
258 pr_info("release fpgaimage\n");
264 * NOTE: supports systemmap parallel programming
266 static int gs_set_download_method(struct fpgaimage *fimage)
268 pr_info("set program method\n");
270 fimage->dmethod = m_systemmap;
272 pr_info("systemmap program method\n");
277 static int init_driver(void)
279 firmware_pdev = platform_device_register_simple("fpgaboot", -1,
281 return PTR_ERR_OR_ZERO(firmware_pdev);
284 static void finish_driver(void)
286 platform_device_unregister(firmware_pdev);
289 static int gs_fpgaboot(void)
292 struct fpgaimage *fimage;
294 fimage = kmalloc(sizeof(struct fpgaimage), GFP_KERNEL);
298 err = gs_load_image(fimage, file);
300 pr_err("gs_load_image error\n");
304 err = gs_read_image(fimage);
306 pr_err("gs_read_image error\n");
310 err = gs_set_download_method(fimage);
312 pr_err("gs_set_download_method error\n");
316 err = gs_download_image(fimage, bus_2byte);
318 pr_err("gs_download_image error\n");
322 err = gs_release_image(fimage);
324 pr_err("gs_release_image error\n");
332 err = gs_release_image(fimage);
334 pr_err("gs_release_image error\n");
342 static int __init gs_fpgaboot_init(void)
346 pr_info("FPGA DOWNLOAD --->\n");
348 pr_info("FPGA image file name: %s\n", file);
352 pr_err("FPGA DRIVER INIT FAIL!!\n");
358 pr_err("GPIO INIT FAIL!!\n");
364 pr_err("FPGA DOWNLOAD FAIL!!\n");
368 pr_info("FPGA DOWNLOAD DONE <---\n");
378 static void __exit gs_fpgaboot_exit(void)
381 pr_info("FPGA image download module removed\n");
384 module_init(gs_fpgaboot_init);
385 module_exit(gs_fpgaboot_exit);
387 MODULE_AUTHOR("Insop Song");
388 MODULE_DESCRIPTION("Xlinix FPGA firmware download");
389 MODULE_LICENSE("GPL");