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/moduleparam.h>
21 #include <linux/types.h>
22 #include <linux/device.h>
23 #include <linux/string.h>
24 #include <linux/slab.h>
26 #include <linux/platform_device.h>
28 #include <linux/delay.h>
30 #include <linux/firmware.h>
32 #include "gs_fpgaboot.h"
35 #define DEVICE_NAME "device"
36 #define CLASS_NAME "fpgaboot"
38 static uint8_t bits_magic[] = {
39 0x0, 0x9, 0xf, 0xf0, 0xf, 0xf0,
40 0xf, 0xf0, 0xf, 0xf0, 0x0, 0x0, 0x1};
42 /* fake device for request_firmware */
43 static struct platform_device *firmware_pdev;
45 static char *file = "xlinx_fpga_firmware.bit";
46 module_param(file, charp, S_IRUGO);
47 MODULE_PARM_DESC(file, "Xilinx FPGA firmware file.");
49 static void read_bitstream(char *bitdata, char *buf, int *offset, int rdsize)
51 memcpy(buf, bitdata + *offset, rdsize);
55 static void readinfo_bitstream(char *bitdata, char *buf, int *offset)
60 /* read section char */
61 read_bitstream(bitdata, tbuf, offset, 1);
64 read_bitstream(bitdata, tbuf, offset, 2);
66 len = tbuf[0] << 8 | tbuf[1];
68 read_bitstream(bitdata, buf, offset, len);
75 static int readlength_bitstream(char *bitdata, int *lendata, int *offset)
79 /* read section char */
80 read_bitstream(bitdata, tbuf, offset, 1);
82 /* make sure it is section 'e' */
84 pr_err("error: length section is not 'e', but %c\n", tbuf[0]);
88 /* read 4bytes length */
89 read_bitstream(bitdata, tbuf, offset, 4);
91 *lendata = tbuf[0] << 24 | tbuf[1] << 16 |
92 tbuf[2] << 8 | tbuf[3];
99 * read first 13 bytes to check bitstream magic number
101 static int readmagic_bitstream(char *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(struct fpgaimage *fimage)
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 void gs_read_bitstream(struct fpgaimage *fimage)
142 bitdata = (char *)fimage->fw_entry->data;
144 readmagic_bitstream(bitdata, &offset);
145 readinfo_bitstream(bitdata, fimage->filename, &offset);
146 readinfo_bitstream(bitdata, fimage->part, &offset);
147 readinfo_bitstream(bitdata, fimage->date, &offset);
148 readinfo_bitstream(bitdata, fimage->time, &offset);
149 readlength_bitstream(bitdata, &fimage->lendata, &offset);
151 fimage->fpgadata = bitdata + offset;
154 static int gs_read_image(struct fpgaimage *fimage)
158 img_fmt = get_imageformat(fimage);
162 pr_info("image is bitstream format\n");
163 gs_read_bitstream(fimage);
166 pr_err("unsupported fpga image format\n");
170 gs_print_header(fimage);
175 static int gs_load_image(struct fpgaimage *fimage, char *fw_file)
179 pr_info("load fpgaimage %s\n", fw_file);
181 err = request_firmware(&fimage->fw_entry, fw_file, &firmware_pdev->dev);
183 pr_err("firmware %s is missing, cannot continue.\n", fw_file);
190 static int gs_download_image(struct fpgaimage *fimage, enum wbus bus_bytes)
196 bitdata = (char *)fimage->fpgadata;
197 size = fimage->lendata;
200 print_hex_dump_bytes("bitfile sample: ", DUMP_PREFIX_OFFSET,
202 #endif /* DEBUG_FPGA */
203 if (!xl_supported_prog_bus_width(bus_bytes)) {
204 pr_err("unsupported program bus width %d\n",
209 /* Bring csi_b, rdwr_b Low and program_b High */
214 /* Configuration reset */
219 /* Wait for Device Initialization */
220 while (xl_get_init_b() == 0)
223 pr_info("device init done\n");
225 for (i = 0; i < size; i += bus_bytes)
226 xl_shift_bytes_out(bus_bytes, bitdata+i);
228 pr_info("program done\n");
231 if (xl_get_init_b() == 0) {
232 pr_err("init_b 0\n");
236 while (xl_get_done_b() == 0) {
237 if (cnt++ > MAX_WAIT_DONE) {
238 pr_err("init_B %d\n", xl_get_init_b());
243 if (cnt > MAX_WAIT_DONE) {
244 pr_err("fpga download fail\n");
248 pr_info("download fpgaimage\n");
250 /* Compensate for Special Startup Conditions */
256 static int gs_release_image(struct fpgaimage *fimage)
258 release_firmware(fimage->fw_entry);
259 pr_info("release fpgaimage\n");
265 * NOTE: supports systemmap parallel programming
267 static int gs_set_download_method(struct fpgaimage *fimage)
269 pr_info("set program method\n");
271 fimage->dmethod = m_systemmap;
273 pr_info("systemmap program method\n");
278 static int init_driver(void)
280 firmware_pdev = platform_device_register_simple("fpgaboot", -1,
282 return PTR_ERR_OR_ZERO(firmware_pdev);
285 static void finish_driver(void)
287 platform_device_unregister(firmware_pdev);
290 static int gs_fpgaboot(void)
293 struct fpgaimage *fimage;
295 fimage = kmalloc(sizeof(struct fpgaimage), GFP_KERNEL);
299 err = gs_load_image(fimage, file);
301 pr_err("gs_load_image error\n");
305 err = gs_read_image(fimage);
307 pr_err("gs_read_image error\n");
311 err = gs_set_download_method(fimage);
313 pr_err("gs_set_download_method error\n");
317 err = gs_download_image(fimage, bus_2byte);
319 pr_err("gs_download_image error\n");
323 err = gs_release_image(fimage);
325 pr_err("gs_release_image error\n");
333 err = gs_release_image(fimage);
335 pr_err("gs_release_image error\n");
343 static int __init gs_fpgaboot_init(void)
347 pr_info("FPGA DOWNLOAD --->\n");
349 pr_info("FPGA image file name: %s\n", file);
353 pr_err("FPGA DRIVER INIT FAIL!!\n");
359 pr_err("GPIO INIT FAIL!!\n");
365 pr_err("FPGA DOWNLOAD FAIL!!\n");
369 pr_info("FPGA DOWNLOAD DONE <---\n");
379 static void __exit gs_fpgaboot_exit(void)
382 pr_info("FPGA image download module removed\n");
385 module_init(gs_fpgaboot_init);
386 module_exit(gs_fpgaboot_exit);
388 MODULE_AUTHOR("Insop Song");
389 MODULE_DESCRIPTION("Xlinix FPGA firmware download");
390 MODULE_LICENSE("GPL");