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Commit | Line | Data |
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09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
2 | /* |
3 | * Generic Macintosh NCR5380 driver | |
4 | * | |
5 | * Copyright 1998, Michael Schmitz <mschmitz@lbl.gov> | |
6 | * | |
7 | * derived in part from: | |
8 | */ | |
9 | /* | |
10 | * Generic Generic NCR5380 driver | |
11 | * | |
12 | * Copyright 1995, Russell King | |
1da177e4 LT |
13 | */ |
14 | ||
1da177e4 | 15 | #include <linux/types.h> |
1da177e4 | 16 | #include <linux/module.h> |
1da177e4 LT |
17 | #include <linux/ioport.h> |
18 | #include <linux/init.h> | |
19 | #include <linux/blkdev.h> | |
20 | #include <linux/interrupt.h> | |
cbad48de | 21 | #include <linux/platform_device.h> |
1da177e4 | 22 | |
cbad48de | 23 | #include <asm/hwtest.h> |
1da177e4 | 24 | #include <asm/io.h> |
1da177e4 | 25 | #include <asm/macints.h> |
cbad48de | 26 | #include <asm/setup.h> |
1da177e4 | 27 | |
1da177e4 | 28 | #include <scsi/scsi_host.h> |
92de3831 FT |
29 | |
30 | /* Definitions for the core NCR5380 driver. */ | |
e744fdea | 31 | |
820682b1 | 32 | #define NCR5380_implementation_fields int pdma_residual |
92de3831 | 33 | |
61e1ce58 FT |
34 | #define NCR5380_read(reg) in_8(hostdata->io + ((reg) << 4)) |
35 | #define NCR5380_write(reg, value) out_8(hostdata->io + ((reg) << 4), value) | |
92de3831 | 36 | |
4a98f896 | 37 | #define NCR5380_dma_xfer_len macscsi_dma_xfer_len |
6c4b88ca FT |
38 | #define NCR5380_dma_recv_setup macscsi_pread |
39 | #define NCR5380_dma_send_setup macscsi_pwrite | |
4a98f896 | 40 | #define NCR5380_dma_residual macscsi_dma_residual |
92de3831 FT |
41 | |
42 | #define NCR5380_intr macscsi_intr | |
43 | #define NCR5380_queue_command macscsi_queue_command | |
44 | #define NCR5380_abort macscsi_abort | |
12e5fc66 | 45 | #define NCR5380_host_reset macscsi_host_reset |
92de3831 | 46 | #define NCR5380_info macscsi_info |
92de3831 | 47 | |
1da177e4 LT |
48 | #include "NCR5380.h" |
49 | ||
1da177e4 | 50 | static int setup_can_queue = -1; |
6e9ae6d5 | 51 | module_param(setup_can_queue, int, 0); |
1da177e4 | 52 | static int setup_cmd_per_lun = -1; |
6e9ae6d5 | 53 | module_param(setup_cmd_per_lun, int, 0); |
1da177e4 | 54 | static int setup_sg_tablesize = -1; |
6e9ae6d5 | 55 | module_param(setup_sg_tablesize, int, 0); |
1da177e4 | 56 | static int setup_use_pdma = -1; |
6e9ae6d5 | 57 | module_param(setup_use_pdma, int, 0); |
1da177e4 | 58 | static int setup_hostid = -1; |
6e9ae6d5 | 59 | module_param(setup_hostid, int, 0); |
9c3f0e2b FT |
60 | static int setup_toshiba_delay = -1; |
61 | module_param(setup_toshiba_delay, int, 0); | |
1da177e4 | 62 | |
6e9ae6d5 FT |
63 | #ifndef MODULE |
64 | static int __init mac_scsi_setup(char *str) | |
65 | { | |
9c3f0e2b | 66 | int ints[8]; |
6e9ae6d5 FT |
67 | |
68 | (void)get_options(str, ARRAY_SIZE(ints), ints); | |
69 | ||
9c3f0e2b FT |
70 | if (ints[0] < 1) { |
71 | pr_err("Usage: mac5380=<can_queue>[,<cmd_per_lun>[,<sg_tablesize>[,<hostid>[,<use_tags>[,<use_pdma>[,<toshiba_delay>]]]]]]\n"); | |
6e9ae6d5 | 72 | return 0; |
1da177e4 | 73 | } |
6e9ae6d5 FT |
74 | if (ints[0] >= 1) |
75 | setup_can_queue = ints[1]; | |
76 | if (ints[0] >= 2) | |
77 | setup_cmd_per_lun = ints[2]; | |
78 | if (ints[0] >= 3) | |
79 | setup_sg_tablesize = ints[3]; | |
80 | if (ints[0] >= 4) | |
81 | setup_hostid = ints[4]; | |
c4ec6f92 | 82 | /* ints[5] (use_tagged_queuing) is ignored */ |
6e9ae6d5 | 83 | if (ints[0] >= 6) |
1da177e4 | 84 | setup_use_pdma = ints[6]; |
9c3f0e2b FT |
85 | if (ints[0] >= 7) |
86 | setup_toshiba_delay = ints[7]; | |
1da177e4 LT |
87 | return 1; |
88 | } | |
89 | ||
90 | __setup("mac5380=", mac_scsi_setup); | |
6e9ae6d5 | 91 | #endif /* !MODULE */ |
1da177e4 | 92 | |
3a0f64bf FT |
93 | /* Pseudo DMA asm originally by Ove Edlund */ |
94 | ||
95 | #define CP_IO_TO_MEM(s,d,n) \ | |
1da177e4 LT |
96 | __asm__ __volatile__ \ |
97 | (" cmp.w #4,%2\n" \ | |
98 | " bls 8f\n" \ | |
99 | " move.w %1,%%d0\n" \ | |
100 | " neg.b %%d0\n" \ | |
101 | " and.w #3,%%d0\n" \ | |
102 | " sub.w %%d0,%2\n" \ | |
103 | " bra 2f\n" \ | |
104 | " 1: move.b (%0),(%1)+\n" \ | |
105 | " 2: dbf %%d0,1b\n" \ | |
106 | " move.w %2,%%d0\n" \ | |
107 | " lsr.w #5,%%d0\n" \ | |
108 | " bra 4f\n" \ | |
109 | " 3: move.l (%0),(%1)+\n" \ | |
110 | "31: move.l (%0),(%1)+\n" \ | |
111 | "32: move.l (%0),(%1)+\n" \ | |
112 | "33: move.l (%0),(%1)+\n" \ | |
113 | "34: move.l (%0),(%1)+\n" \ | |
114 | "35: move.l (%0),(%1)+\n" \ | |
115 | "36: move.l (%0),(%1)+\n" \ | |
116 | "37: move.l (%0),(%1)+\n" \ | |
117 | " 4: dbf %%d0,3b\n" \ | |
118 | " move.w %2,%%d0\n" \ | |
119 | " lsr.w #2,%%d0\n" \ | |
120 | " and.w #7,%%d0\n" \ | |
121 | " bra 6f\n" \ | |
122 | " 5: move.l (%0),(%1)+\n" \ | |
123 | " 6: dbf %%d0,5b\n" \ | |
124 | " and.w #3,%2\n" \ | |
125 | " bra 8f\n" \ | |
126 | " 7: move.b (%0),(%1)+\n" \ | |
127 | " 8: dbf %2,7b\n" \ | |
128 | " moveq.l #0, %2\n" \ | |
129 | " 9: \n" \ | |
130 | ".section .fixup,\"ax\"\n" \ | |
131 | " .even\n" \ | |
3a0f64bf FT |
132 | "91: moveq.l #1, %2\n" \ |
133 | " jra 9b\n" \ | |
134 | "94: moveq.l #4, %2\n" \ | |
1da177e4 LT |
135 | " jra 9b\n" \ |
136 | ".previous\n" \ | |
137 | ".section __ex_table,\"a\"\n" \ | |
138 | " .align 4\n" \ | |
3a0f64bf FT |
139 | " .long 1b,91b\n" \ |
140 | " .long 3b,94b\n" \ | |
141 | " .long 31b,94b\n" \ | |
142 | " .long 32b,94b\n" \ | |
143 | " .long 33b,94b\n" \ | |
144 | " .long 34b,94b\n" \ | |
145 | " .long 35b,94b\n" \ | |
146 | " .long 36b,94b\n" \ | |
147 | " .long 37b,94b\n" \ | |
148 | " .long 5b,94b\n" \ | |
149 | " .long 7b,91b\n" \ | |
1da177e4 | 150 | ".previous" \ |
3a0f64bf FT |
151 | : "=a"(s), "=a"(d), "=d"(n) \ |
152 | : "0"(s), "1"(d), "2"(n) \ | |
1da177e4 LT |
153 | : "d0") |
154 | ||
4a98f896 FT |
155 | static inline int macscsi_pread(struct NCR5380_hostdata *hostdata, |
156 | unsigned char *dst, int len) | |
1da177e4 | 157 | { |
4ab2a787 | 158 | u8 __iomem *s = hostdata->pdma_io + (INPUT_DATA_REG << 4); |
3a0f64bf FT |
159 | unsigned char *d = dst; |
160 | int n = len; | |
161 | int transferred; | |
162 | ||
d5d37a0a | 163 | while (!NCR5380_poll_politely(hostdata, BUS_AND_STATUS_REG, |
3a0f64bf FT |
164 | BASR_DRQ | BASR_PHASE_MATCH, |
165 | BASR_DRQ | BASR_PHASE_MATCH, HZ / 64)) { | |
166 | CP_IO_TO_MEM(s, d, n); | |
167 | ||
168 | transferred = d - dst - n; | |
169 | hostdata->pdma_residual = len - transferred; | |
170 | ||
171 | /* No bus error. */ | |
172 | if (n == 0) | |
173 | return 0; | |
174 | ||
175 | /* Target changed phase early? */ | |
d5d37a0a | 176 | if (NCR5380_poll_politely2(hostdata, STATUS_REG, SR_REQ, SR_REQ, |
3a0f64bf FT |
177 | BUS_AND_STATUS_REG, BASR_ACK, BASR_ACK, HZ / 64) < 0) |
178 | scmd_printk(KERN_ERR, hostdata->connected, | |
179 | "%s: !REQ and !ACK\n", __func__); | |
180 | if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH)) | |
181 | return 0; | |
182 | ||
4a98f896 | 183 | dsprintk(NDEBUG_PSEUDO_DMA, hostdata->host, |
3a0f64bf | 184 | "%s: bus error (%d/%d)\n", __func__, transferred, len); |
4a98f896 | 185 | NCR5380_dprint(NDEBUG_PSEUDO_DMA, hostdata->host); |
3a0f64bf FT |
186 | d = dst + transferred; |
187 | n = len - transferred; | |
ffdede67 FT |
188 | } |
189 | ||
3a0f64bf FT |
190 | scmd_printk(KERN_ERR, hostdata->connected, |
191 | "%s: phase mismatch or !DRQ\n", __func__); | |
4a98f896 | 192 | NCR5380_dprint(NDEBUG_PSEUDO_DMA, hostdata->host); |
3a0f64bf | 193 | return -1; |
1da177e4 LT |
194 | } |
195 | ||
196 | ||
3a0f64bf | 197 | #define CP_MEM_TO_IO(s,d,n) \ |
1da177e4 LT |
198 | __asm__ __volatile__ \ |
199 | (" cmp.w #4,%2\n" \ | |
200 | " bls 8f\n" \ | |
201 | " move.w %0,%%d0\n" \ | |
202 | " neg.b %%d0\n" \ | |
203 | " and.w #3,%%d0\n" \ | |
204 | " sub.w %%d0,%2\n" \ | |
205 | " bra 2f\n" \ | |
206 | " 1: move.b (%0)+,(%1)\n" \ | |
207 | " 2: dbf %%d0,1b\n" \ | |
208 | " move.w %2,%%d0\n" \ | |
209 | " lsr.w #5,%%d0\n" \ | |
210 | " bra 4f\n" \ | |
211 | " 3: move.l (%0)+,(%1)\n" \ | |
212 | "31: move.l (%0)+,(%1)\n" \ | |
213 | "32: move.l (%0)+,(%1)\n" \ | |
214 | "33: move.l (%0)+,(%1)\n" \ | |
215 | "34: move.l (%0)+,(%1)\n" \ | |
216 | "35: move.l (%0)+,(%1)\n" \ | |
217 | "36: move.l (%0)+,(%1)\n" \ | |
218 | "37: move.l (%0)+,(%1)\n" \ | |
219 | " 4: dbf %%d0,3b\n" \ | |
220 | " move.w %2,%%d0\n" \ | |
221 | " lsr.w #2,%%d0\n" \ | |
222 | " and.w #7,%%d0\n" \ | |
223 | " bra 6f\n" \ | |
224 | " 5: move.l (%0)+,(%1)\n" \ | |
225 | " 6: dbf %%d0,5b\n" \ | |
226 | " and.w #3,%2\n" \ | |
227 | " bra 8f\n" \ | |
228 | " 7: move.b (%0)+,(%1)\n" \ | |
229 | " 8: dbf %2,7b\n" \ | |
230 | " moveq.l #0, %2\n" \ | |
231 | " 9: \n" \ | |
232 | ".section .fixup,\"ax\"\n" \ | |
233 | " .even\n" \ | |
3a0f64bf FT |
234 | "91: moveq.l #1, %2\n" \ |
235 | " jra 9b\n" \ | |
236 | "94: moveq.l #4, %2\n" \ | |
1da177e4 LT |
237 | " jra 9b\n" \ |
238 | ".previous\n" \ | |
239 | ".section __ex_table,\"a\"\n" \ | |
240 | " .align 4\n" \ | |
3a0f64bf FT |
241 | " .long 1b,91b\n" \ |
242 | " .long 3b,94b\n" \ | |
243 | " .long 31b,94b\n" \ | |
244 | " .long 32b,94b\n" \ | |
245 | " .long 33b,94b\n" \ | |
246 | " .long 34b,94b\n" \ | |
247 | " .long 35b,94b\n" \ | |
248 | " .long 36b,94b\n" \ | |
249 | " .long 37b,94b\n" \ | |
250 | " .long 5b,94b\n" \ | |
251 | " .long 7b,91b\n" \ | |
1da177e4 | 252 | ".previous" \ |
3a0f64bf FT |
253 | : "=a"(s), "=a"(d), "=d"(n) \ |
254 | : "0"(s), "1"(d), "2"(n) \ | |
1da177e4 LT |
255 | : "d0") |
256 | ||
4a98f896 FT |
257 | static inline int macscsi_pwrite(struct NCR5380_hostdata *hostdata, |
258 | unsigned char *src, int len) | |
1da177e4 | 259 | { |
3a0f64bf | 260 | unsigned char *s = src; |
4ab2a787 | 261 | u8 __iomem *d = hostdata->pdma_io + (OUTPUT_DATA_REG << 4); |
3a0f64bf FT |
262 | int n = len; |
263 | int transferred; | |
264 | ||
d5d37a0a | 265 | while (!NCR5380_poll_politely(hostdata, BUS_AND_STATUS_REG, |
3a0f64bf FT |
266 | BASR_DRQ | BASR_PHASE_MATCH, |
267 | BASR_DRQ | BASR_PHASE_MATCH, HZ / 64)) { | |
268 | CP_MEM_TO_IO(s, d, n); | |
269 | ||
270 | transferred = s - src - n; | |
271 | hostdata->pdma_residual = len - transferred; | |
272 | ||
273 | /* Target changed phase early? */ | |
d5d37a0a | 274 | if (NCR5380_poll_politely2(hostdata, STATUS_REG, SR_REQ, SR_REQ, |
3a0f64bf FT |
275 | BUS_AND_STATUS_REG, BASR_ACK, BASR_ACK, HZ / 64) < 0) |
276 | scmd_printk(KERN_ERR, hostdata->connected, | |
277 | "%s: !REQ and !ACK\n", __func__); | |
278 | if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH)) | |
279 | return 0; | |
280 | ||
281 | /* No bus error. */ | |
282 | if (n == 0) { | |
d5d37a0a | 283 | if (NCR5380_poll_politely(hostdata, TARGET_COMMAND_REG, |
3a0f64bf FT |
284 | TCR_LAST_BYTE_SENT, |
285 | TCR_LAST_BYTE_SENT, HZ / 64) < 0) | |
286 | scmd_printk(KERN_ERR, hostdata->connected, | |
287 | "%s: Last Byte Sent timeout\n", __func__); | |
288 | return 0; | |
289 | } | |
290 | ||
4a98f896 | 291 | dsprintk(NDEBUG_PSEUDO_DMA, hostdata->host, |
3a0f64bf | 292 | "%s: bus error (%d/%d)\n", __func__, transferred, len); |
4a98f896 | 293 | NCR5380_dprint(NDEBUG_PSEUDO_DMA, hostdata->host); |
3a0f64bf FT |
294 | s = src + transferred; |
295 | n = len - transferred; | |
ffdede67 FT |
296 | } |
297 | ||
3a0f64bf FT |
298 | scmd_printk(KERN_ERR, hostdata->connected, |
299 | "%s: phase mismatch or !DRQ\n", __func__); | |
4a98f896 | 300 | NCR5380_dprint(NDEBUG_PSEUDO_DMA, hostdata->host); |
ffdede67 | 301 | |
3a0f64bf | 302 | return -1; |
ffdede67 | 303 | } |
1da177e4 | 304 | |
4a98f896 | 305 | static int macscsi_dma_xfer_len(struct NCR5380_hostdata *hostdata, |
7e9ec8d9 FT |
306 | struct scsi_cmnd *cmd) |
307 | { | |
3a0f64bf FT |
308 | if (hostdata->flags & FLAG_NO_PSEUDO_DMA || |
309 | cmd->SCp.this_residual < 16) | |
7e9ec8d9 FT |
310 | return 0; |
311 | ||
3a0f64bf | 312 | return cmd->SCp.this_residual; |
7e9ec8d9 FT |
313 | } |
314 | ||
4a98f896 FT |
315 | static int macscsi_dma_residual(struct NCR5380_hostdata *hostdata) |
316 | { | |
317 | return hostdata->pdma_residual; | |
318 | } | |
319 | ||
1da177e4 LT |
320 | #include "NCR5380.c" |
321 | ||
cbad48de FT |
322 | #define DRV_MODULE_NAME "mac_scsi" |
323 | #define PFX DRV_MODULE_NAME ": " | |
324 | ||
325 | static struct scsi_host_template mac_scsi_template = { | |
aa2e2cb1 FT |
326 | .module = THIS_MODULE, |
327 | .proc_name = DRV_MODULE_NAME, | |
aa2e2cb1 FT |
328 | .name = "Macintosh NCR5380 SCSI", |
329 | .info = macscsi_info, | |
330 | .queuecommand = macscsi_queue_command, | |
331 | .eh_abort_handler = macscsi_abort, | |
12e5fc66 | 332 | .eh_host_reset_handler = macscsi_host_reset, |
aa2e2cb1 FT |
333 | .can_queue = 16, |
334 | .this_id = 7, | |
3a0f64bf | 335 | .sg_tablesize = 1, |
aa2e2cb1 | 336 | .cmd_per_lun = 2, |
4af14d11 | 337 | .dma_boundary = PAGE_SIZE - 1, |
32b26a10 | 338 | .cmd_size = NCR5380_CMD_SIZE, |
0a4e3612 | 339 | .max_sectors = 128, |
1da177e4 LT |
340 | }; |
341 | ||
cbad48de FT |
342 | static int __init mac_scsi_probe(struct platform_device *pdev) |
343 | { | |
344 | struct Scsi_Host *instance; | |
820682b1 | 345 | struct NCR5380_hostdata *hostdata; |
cbad48de FT |
346 | int error; |
347 | int host_flags = 0; | |
348 | struct resource *irq, *pio_mem, *pdma_mem = NULL; | |
349 | ||
350 | pio_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
351 | if (!pio_mem) | |
352 | return -ENODEV; | |
353 | ||
cbad48de | 354 | pdma_mem = platform_get_resource(pdev, IORESOURCE_MEM, 1); |
cbad48de FT |
355 | |
356 | irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
357 | ||
358 | if (!hwreg_present((unsigned char *)pio_mem->start + | |
359 | (STATUS_REG << 4))) { | |
360 | pr_info(PFX "no device detected at %pap\n", &pio_mem->start); | |
361 | return -ENODEV; | |
362 | } | |
363 | ||
364 | if (setup_can_queue > 0) | |
365 | mac_scsi_template.can_queue = setup_can_queue; | |
366 | if (setup_cmd_per_lun > 0) | |
367 | mac_scsi_template.cmd_per_lun = setup_cmd_per_lun; | |
368 | if (setup_sg_tablesize >= 0) | |
369 | mac_scsi_template.sg_tablesize = setup_sg_tablesize; | |
370 | if (setup_hostid >= 0) | |
371 | mac_scsi_template.this_id = setup_hostid & 7; | |
cbad48de FT |
372 | |
373 | instance = scsi_host_alloc(&mac_scsi_template, | |
374 | sizeof(struct NCR5380_hostdata)); | |
375 | if (!instance) | |
376 | return -ENOMEM; | |
377 | ||
cbad48de FT |
378 | if (irq) |
379 | instance->irq = irq->start; | |
380 | else | |
381 | instance->irq = NO_IRQ; | |
382 | ||
820682b1 FT |
383 | hostdata = shost_priv(instance); |
384 | hostdata->base = pio_mem->start; | |
4ab2a787 | 385 | hostdata->io = (u8 __iomem *)pio_mem->start; |
cbad48de | 386 | |
820682b1 | 387 | if (pdma_mem && setup_use_pdma) |
4ab2a787 | 388 | hostdata->pdma_io = (u8 __iomem *)pdma_mem->start; |
820682b1 | 389 | else |
cbad48de FT |
390 | host_flags |= FLAG_NO_PSEUDO_DMA; |
391 | ||
9c3f0e2b | 392 | host_flags |= setup_toshiba_delay > 0 ? FLAG_TOSHIBA_DELAY : 0; |
ca513fc9 | 393 | |
8053b0ee | 394 | error = NCR5380_init(instance, host_flags | FLAG_LATE_DMA_SETUP); |
0ad0eff9 FT |
395 | if (error) |
396 | goto fail_init; | |
cbad48de FT |
397 | |
398 | if (instance->irq != NO_IRQ) { | |
399 | error = request_irq(instance->irq, macscsi_intr, IRQF_SHARED, | |
400 | "NCR5380", instance); | |
401 | if (error) | |
402 | goto fail_irq; | |
403 | } | |
404 | ||
9c3f0e2b FT |
405 | NCR5380_maybe_reset_bus(instance); |
406 | ||
cbad48de FT |
407 | error = scsi_add_host(instance, NULL); |
408 | if (error) | |
409 | goto fail_host; | |
410 | ||
411 | platform_set_drvdata(pdev, instance); | |
412 | ||
413 | scsi_scan_host(instance); | |
414 | return 0; | |
415 | ||
416 | fail_host: | |
417 | if (instance->irq != NO_IRQ) | |
418 | free_irq(instance->irq, instance); | |
419 | fail_irq: | |
420 | NCR5380_exit(instance); | |
0ad0eff9 | 421 | fail_init: |
cbad48de FT |
422 | scsi_host_put(instance); |
423 | return error; | |
424 | } | |
425 | ||
426 | static int __exit mac_scsi_remove(struct platform_device *pdev) | |
427 | { | |
428 | struct Scsi_Host *instance = platform_get_drvdata(pdev); | |
429 | ||
430 | scsi_remove_host(instance); | |
431 | if (instance->irq != NO_IRQ) | |
432 | free_irq(instance->irq, instance); | |
433 | NCR5380_exit(instance); | |
434 | scsi_host_put(instance); | |
435 | return 0; | |
436 | } | |
437 | ||
438 | static struct platform_driver mac_scsi_driver = { | |
439 | .remove = __exit_p(mac_scsi_remove), | |
440 | .driver = { | |
441 | .name = DRV_MODULE_NAME, | |
cbad48de FT |
442 | }, |
443 | }; | |
1da177e4 | 444 | |
cbad48de | 445 | module_platform_driver_probe(mac_scsi_driver, mac_scsi_probe); |
6e9ae6d5 | 446 | |
cbad48de | 447 | MODULE_ALIAS("platform:" DRV_MODULE_NAME); |
6e9ae6d5 | 448 | MODULE_LICENSE("GPL"); |