1 // SPDX-License-Identifier: GPL-2.0-only
3 * Intel IXP4xx Network Processor Engine driver for Linux
5 * Copyright (C) 2007 Krzysztof Halasa <khc@pm.waw.pl>
7 * The code is based on publicly available information:
8 * - Intel IXP4xx Developer's Manual and other e-papers
9 * - Intel IXP400 Access Library Software (BSD license)
10 * - previous works by Christian Hohnstaedt <chohnstaedt@innominate.com>
14 #include <linux/delay.h>
15 #include <linux/dma-mapping.h>
16 #include <linux/firmware.h>
18 #include <linux/kernel.h>
19 #include <linux/mfd/syscon.h>
20 #include <linux/module.h>
22 #include <linux/of_platform.h>
23 #include <linux/platform_device.h>
24 #include <linux/soc/ixp4xx/npe.h>
25 #include <linux/soc/ixp4xx/cpu.h>
31 #define MAX_RETRIES 1000 /* microseconds */
32 #define NPE_42X_DATA_SIZE 0x800 /* in dwords */
33 #define NPE_46X_DATA_SIZE 0x1000
34 #define NPE_A_42X_INSTR_SIZE 0x1000
35 #define NPE_B_AND_C_42X_INSTR_SIZE 0x800
36 #define NPE_46X_INSTR_SIZE 0x1000
37 #define REGS_SIZE 0x1000
39 #define NPE_PHYS_REG 32
41 #define FW_MAGIC 0xFEEDF00D
42 #define FW_BLOCK_TYPE_INSTR 0x0
43 #define FW_BLOCK_TYPE_DATA 0x1
44 #define FW_BLOCK_TYPE_EOF 0xF
46 /* NPE exec status (read) and command (write) */
47 #define CMD_NPE_STEP 0x01
48 #define CMD_NPE_START 0x02
49 #define CMD_NPE_STOP 0x03
50 #define CMD_NPE_CLR_PIPE 0x04
51 #define CMD_CLR_PROFILE_CNT 0x0C
52 #define CMD_RD_INS_MEM 0x10 /* instruction memory */
53 #define CMD_WR_INS_MEM 0x11
54 #define CMD_RD_DATA_MEM 0x12 /* data memory */
55 #define CMD_WR_DATA_MEM 0x13
56 #define CMD_RD_ECS_REG 0x14 /* exec access register */
57 #define CMD_WR_ECS_REG 0x15
59 #define STAT_RUN 0x80000000
60 #define STAT_STOP 0x40000000
61 #define STAT_CLEAR 0x20000000
62 #define STAT_ECS_K 0x00800000 /* pipeline clean */
64 #define NPE_STEVT 0x1B
65 #define NPE_STARTPC 0x1C
66 #define NPE_REGMAP 0x1E
67 #define NPE_CINDEX 0x1F
69 #define INSTR_WR_REG_SHORT 0x0000C000
70 #define INSTR_WR_REG_BYTE 0x00004000
71 #define INSTR_RD_FIFO 0x0F888220
72 #define INSTR_RESET_MBOX 0x0FAC8210
74 #define ECS_BG_CTXT_REG_0 0x00 /* Background Executing Context */
75 #define ECS_BG_CTXT_REG_1 0x01 /* Stack level */
76 #define ECS_BG_CTXT_REG_2 0x02
77 #define ECS_PRI_1_CTXT_REG_0 0x04 /* Priority 1 Executing Context */
78 #define ECS_PRI_1_CTXT_REG_1 0x05 /* Stack level */
79 #define ECS_PRI_1_CTXT_REG_2 0x06
80 #define ECS_PRI_2_CTXT_REG_0 0x08 /* Priority 2 Executing Context */
81 #define ECS_PRI_2_CTXT_REG_1 0x09 /* Stack level */
82 #define ECS_PRI_2_CTXT_REG_2 0x0A
83 #define ECS_DBG_CTXT_REG_0 0x0C /* Debug Executing Context */
84 #define ECS_DBG_CTXT_REG_1 0x0D /* Stack level */
85 #define ECS_DBG_CTXT_REG_2 0x0E
86 #define ECS_INSTRUCT_REG 0x11 /* NPE Instruction Register */
88 #define ECS_REG_0_ACTIVE 0x80000000 /* all levels */
89 #define ECS_REG_0_NEXTPC_MASK 0x1FFF0000 /* BG/PRI1/PRI2 levels */
90 #define ECS_REG_0_LDUR_BITS 8
91 #define ECS_REG_0_LDUR_MASK 0x00000700 /* all levels */
92 #define ECS_REG_1_CCTXT_BITS 16
93 #define ECS_REG_1_CCTXT_MASK 0x000F0000 /* all levels */
94 #define ECS_REG_1_SELCTXT_BITS 0
95 #define ECS_REG_1_SELCTXT_MASK 0x0000000F /* all levels */
96 #define ECS_DBG_REG_2_IF 0x00100000 /* debug level */
97 #define ECS_DBG_REG_2_IE 0x00080000 /* debug level */
99 /* NPE watchpoint_fifo register bit */
100 #define WFIFO_VALID 0x80000000
102 /* NPE messaging_status register bit definitions */
103 #define MSGSTAT_OFNE 0x00010000 /* OutFifoNotEmpty */
104 #define MSGSTAT_IFNF 0x00020000 /* InFifoNotFull */
105 #define MSGSTAT_OFNF 0x00040000 /* OutFifoNotFull */
106 #define MSGSTAT_IFNE 0x00080000 /* InFifoNotEmpty */
107 #define MSGSTAT_MBINT 0x00100000 /* Mailbox interrupt */
108 #define MSGSTAT_IFINT 0x00200000 /* InFifo interrupt */
109 #define MSGSTAT_OFINT 0x00400000 /* OutFifo interrupt */
110 #define MSGSTAT_WFINT 0x00800000 /* WatchFifo interrupt */
112 /* NPE messaging_control register bit definitions */
113 #define MSGCTL_OUT_FIFO 0x00010000 /* enable output FIFO */
114 #define MSGCTL_IN_FIFO 0x00020000 /* enable input FIFO */
115 #define MSGCTL_OUT_FIFO_WRITE 0x01000000 /* enable FIFO + WRITE */
116 #define MSGCTL_IN_FIFO_WRITE 0x02000000
118 /* NPE mailbox_status value for reset */
119 #define RESET_MBOX_STAT 0x0000F0F0
121 #define NPE_A_FIRMWARE "NPE-A"
122 #define NPE_B_FIRMWARE "NPE-B"
123 #define NPE_C_FIRMWARE "NPE-C"
125 const char *npe_names[] = { NPE_A_FIRMWARE, NPE_B_FIRMWARE, NPE_C_FIRMWARE };
127 #define print_npe(pri, npe, fmt, ...) \
128 printk(pri "%s: " fmt, npe_name(npe), ## __VA_ARGS__)
131 #define debug_msg(npe, fmt, ...) \
132 print_npe(KERN_DEBUG, npe, fmt, ## __VA_ARGS__)
134 #define debug_msg(npe, fmt, ...)
140 { ECS_BG_CTXT_REG_0, 0xA0000000 },
141 { ECS_BG_CTXT_REG_1, 0x01000000 },
142 { ECS_BG_CTXT_REG_2, 0x00008000 },
143 { ECS_PRI_1_CTXT_REG_0, 0x20000080 },
144 { ECS_PRI_1_CTXT_REG_1, 0x01000000 },
145 { ECS_PRI_1_CTXT_REG_2, 0x00008000 },
146 { ECS_PRI_2_CTXT_REG_0, 0x20000080 },
147 { ECS_PRI_2_CTXT_REG_1, 0x01000000 },
148 { ECS_PRI_2_CTXT_REG_2, 0x00008000 },
149 { ECS_DBG_CTXT_REG_0, 0x20000000 },
150 { ECS_DBG_CTXT_REG_1, 0x00000000 },
151 { ECS_DBG_CTXT_REG_2, 0x001E0000 },
152 { ECS_INSTRUCT_REG, 0x1003C00F },
155 static struct npe npe_tab[NPE_COUNT] = {
165 int npe_running(struct npe *npe)
167 return (__raw_readl(&npe->regs->exec_status_cmd) & STAT_RUN) != 0;
170 static void npe_cmd_write(struct npe *npe, u32 addr, int cmd, u32 data)
172 __raw_writel(data, &npe->regs->exec_data);
173 __raw_writel(addr, &npe->regs->exec_addr);
174 __raw_writel(cmd, &npe->regs->exec_status_cmd);
177 static u32 npe_cmd_read(struct npe *npe, u32 addr, int cmd)
179 __raw_writel(addr, &npe->regs->exec_addr);
180 __raw_writel(cmd, &npe->regs->exec_status_cmd);
181 /* Iintroduce extra read cycles after issuing read command to NPE
182 so that we read the register after the NPE has updated it.
183 This is to overcome race condition between XScale and NPE */
184 __raw_readl(&npe->regs->exec_data);
185 __raw_readl(&npe->regs->exec_data);
186 return __raw_readl(&npe->regs->exec_data);
189 static void npe_clear_active(struct npe *npe, u32 reg)
191 u32 val = npe_cmd_read(npe, reg, CMD_RD_ECS_REG);
192 npe_cmd_write(npe, reg, CMD_WR_ECS_REG, val & ~ECS_REG_0_ACTIVE);
195 static void npe_start(struct npe *npe)
197 /* ensure only Background Context Stack Level is active */
198 npe_clear_active(npe, ECS_PRI_1_CTXT_REG_0);
199 npe_clear_active(npe, ECS_PRI_2_CTXT_REG_0);
200 npe_clear_active(npe, ECS_DBG_CTXT_REG_0);
202 __raw_writel(CMD_NPE_CLR_PIPE, &npe->regs->exec_status_cmd);
203 __raw_writel(CMD_NPE_START, &npe->regs->exec_status_cmd);
206 static void npe_stop(struct npe *npe)
208 __raw_writel(CMD_NPE_STOP, &npe->regs->exec_status_cmd);
209 __raw_writel(CMD_NPE_CLR_PIPE, &npe->regs->exec_status_cmd); /*FIXME?*/
212 static int __must_check npe_debug_instr(struct npe *npe, u32 instr, u32 ctx,
218 /* set the Active bit, and the LDUR, in the debug level */
219 npe_cmd_write(npe, ECS_DBG_CTXT_REG_0, CMD_WR_ECS_REG,
220 ECS_REG_0_ACTIVE | (ldur << ECS_REG_0_LDUR_BITS));
222 /* set CCTXT at ECS DEBUG L3 to specify in which context to execute
223 the instruction, and set SELCTXT at ECS DEBUG Level to specify
224 which context store to access.
225 Debug ECS Level Reg 1 has form 0x000n000n, where n = context number
227 npe_cmd_write(npe, ECS_DBG_CTXT_REG_1, CMD_WR_ECS_REG,
228 (ctx << ECS_REG_1_CCTXT_BITS) |
229 (ctx << ECS_REG_1_SELCTXT_BITS));
231 /* clear the pipeline */
232 __raw_writel(CMD_NPE_CLR_PIPE, &npe->regs->exec_status_cmd);
234 /* load NPE instruction into the instruction register */
235 npe_cmd_write(npe, ECS_INSTRUCT_REG, CMD_WR_ECS_REG, instr);
237 /* we need this value later to wait for completion of NPE execution
239 wc = __raw_readl(&npe->regs->watch_count);
241 /* issue a Step One command via the Execution Control register */
242 __raw_writel(CMD_NPE_STEP, &npe->regs->exec_status_cmd);
244 /* Watch Count register increments when NPE completes an instruction */
245 for (i = 0; i < MAX_RETRIES; i++) {
246 if (wc != __raw_readl(&npe->regs->watch_count))
251 print_npe(KERN_ERR, npe, "reset: npe_debug_instr(): timeout\n");
255 static int __must_check npe_logical_reg_write8(struct npe *npe, u32 addr,
258 /* here we build the NPE assembler instruction: mov8 d0, #0 */
259 u32 instr = INSTR_WR_REG_BYTE | /* OpCode */
260 addr << 9 | /* base Operand */
261 (val & 0x1F) << 4 | /* lower 5 bits to immediate data */
262 (val & ~0x1F) << (18 - 5);/* higher 3 bits to CoProc instr. */
263 return npe_debug_instr(npe, instr, ctx, 1); /* execute it */
266 static int __must_check npe_logical_reg_write16(struct npe *npe, u32 addr,
269 /* here we build the NPE assembler instruction: mov16 d0, #0 */
270 u32 instr = INSTR_WR_REG_SHORT | /* OpCode */
271 addr << 9 | /* base Operand */
272 (val & 0x1F) << 4 | /* lower 5 bits to immediate data */
273 (val & ~0x1F) << (18 - 5);/* higher 11 bits to CoProc instr. */
274 return npe_debug_instr(npe, instr, ctx, 1); /* execute it */
277 static int __must_check npe_logical_reg_write32(struct npe *npe, u32 addr,
280 /* write in 16 bit steps first the high and then the low value */
281 if (npe_logical_reg_write16(npe, addr, val >> 16, ctx))
283 return npe_logical_reg_write16(npe, addr + 2, val & 0xFFFF, ctx);
286 static int npe_reset(struct npe *npe)
288 u32 reset_bit = (IXP4XX_FEATURE_RESET_NPEA << npe->id);
289 u32 val, ctl, exec_count, ctx_reg2;
292 ctl = (__raw_readl(&npe->regs->messaging_control) | 0x3F000000) &
295 /* disable parity interrupt */
296 __raw_writel(ctl & 0x3F00FFFF, &npe->regs->messaging_control);
298 /* pre exec - debug instruction */
299 /* turn off the halt bit by clearing Execution Count register. */
300 exec_count = __raw_readl(&npe->regs->exec_count);
301 __raw_writel(0, &npe->regs->exec_count);
302 /* ensure that IF and IE are on (temporarily), so that we don't end up
304 ctx_reg2 = npe_cmd_read(npe, ECS_DBG_CTXT_REG_2, CMD_RD_ECS_REG);
305 npe_cmd_write(npe, ECS_DBG_CTXT_REG_2, CMD_WR_ECS_REG, ctx_reg2 |
306 ECS_DBG_REG_2_IF | ECS_DBG_REG_2_IE);
308 /* clear the FIFOs */
309 while (__raw_readl(&npe->regs->watchpoint_fifo) & WFIFO_VALID)
311 while (__raw_readl(&npe->regs->messaging_status) & MSGSTAT_OFNE)
312 /* read from the outFIFO until empty */
313 print_npe(KERN_DEBUG, npe, "npe_reset: read FIFO = 0x%X\n",
314 __raw_readl(&npe->regs->in_out_fifo));
316 while (__raw_readl(&npe->regs->messaging_status) & MSGSTAT_IFNE)
317 /* step execution of the NPE intruction to read inFIFO using
318 the Debug Executing Context stack */
319 if (npe_debug_instr(npe, INSTR_RD_FIFO, 0, 0))
322 /* reset the mailbox reg from the XScale side */
323 __raw_writel(RESET_MBOX_STAT, &npe->regs->mailbox_status);
325 if (npe_debug_instr(npe, INSTR_RESET_MBOX, 0, 0))
328 /* Reset the physical registers in the NPE register file */
329 for (val = 0; val < NPE_PHYS_REG; val++) {
330 if (npe_logical_reg_write16(npe, NPE_REGMAP, val >> 1, 0))
332 /* address is either 0 or 4 */
333 if (npe_logical_reg_write32(npe, (val & 1) * 4, 0, 0))
337 /* Reset the context store = each context's Context Store registers */
339 /* Context 0 has no STARTPC. Instead, this value is used to set NextPC
340 for Background ECS, to set where NPE starts executing code */
341 val = npe_cmd_read(npe, ECS_BG_CTXT_REG_0, CMD_RD_ECS_REG);
342 val &= ~ECS_REG_0_NEXTPC_MASK;
343 val |= (0 /* NextPC */ << 16) & ECS_REG_0_NEXTPC_MASK;
344 npe_cmd_write(npe, ECS_BG_CTXT_REG_0, CMD_WR_ECS_REG, val);
346 for (i = 0; i < 16; i++) {
347 if (i) { /* Context 0 has no STEVT nor STARTPC */
348 /* STEVT = off, 0x80 */
349 if (npe_logical_reg_write8(npe, NPE_STEVT, 0x80, i))
351 if (npe_logical_reg_write16(npe, NPE_STARTPC, 0, i))
354 /* REGMAP = d0->p0, d8->p2, d16->p4 */
355 if (npe_logical_reg_write16(npe, NPE_REGMAP, 0x820, i))
357 if (npe_logical_reg_write8(npe, NPE_CINDEX, 0, i))
362 /* clear active bit in debug level */
363 npe_cmd_write(npe, ECS_DBG_CTXT_REG_0, CMD_WR_ECS_REG, 0);
364 /* clear the pipeline */
365 __raw_writel(CMD_NPE_CLR_PIPE, &npe->regs->exec_status_cmd);
366 /* restore previous values */
367 __raw_writel(exec_count, &npe->regs->exec_count);
368 npe_cmd_write(npe, ECS_DBG_CTXT_REG_2, CMD_WR_ECS_REG, ctx_reg2);
370 /* write reset values to Execution Context Stack registers */
371 for (val = 0; val < ARRAY_SIZE(ecs_reset); val++)
372 npe_cmd_write(npe, ecs_reset[val].reg, CMD_WR_ECS_REG,
375 /* clear the profile counter */
376 __raw_writel(CMD_CLR_PROFILE_CNT, &npe->regs->exec_status_cmd);
378 __raw_writel(0, &npe->regs->exec_count);
379 __raw_writel(0, &npe->regs->action_points[0]);
380 __raw_writel(0, &npe->regs->action_points[1]);
381 __raw_writel(0, &npe->regs->action_points[2]);
382 __raw_writel(0, &npe->regs->action_points[3]);
383 __raw_writel(0, &npe->regs->watch_count);
386 * We need to work on cached values here because the register
387 * will read inverted but needs to be written non-inverted.
389 val = cpu_ixp4xx_features(npe->rmap);
391 regmap_write(npe->rmap, IXP4XX_EXP_CNFG2, val & ~reset_bit);
393 regmap_write(npe->rmap, IXP4XX_EXP_CNFG2, val | reset_bit);
395 for (i = 0; i < MAX_RETRIES; i++) {
396 val = cpu_ixp4xx_features(npe->rmap);
398 break; /* NPE is back alive */
401 if (i == MAX_RETRIES)
406 /* restore NPE configuration bus Control Register - parity settings */
407 __raw_writel(ctl, &npe->regs->messaging_control);
412 int npe_send_message(struct npe *npe, const void *msg, const char *what)
414 const u32 *send = msg;
417 debug_msg(npe, "Trying to send message %s [%08X:%08X]\n",
418 what, send[0], send[1]);
420 if (__raw_readl(&npe->regs->messaging_status) & MSGSTAT_IFNE) {
421 debug_msg(npe, "NPE input FIFO not empty\n");
425 __raw_writel(send[0], &npe->regs->in_out_fifo);
427 if (!(__raw_readl(&npe->regs->messaging_status) & MSGSTAT_IFNF)) {
428 debug_msg(npe, "NPE input FIFO full\n");
432 __raw_writel(send[1], &npe->regs->in_out_fifo);
434 while ((cycles < MAX_RETRIES) &&
435 (__raw_readl(&npe->regs->messaging_status) & MSGSTAT_IFNE)) {
440 if (cycles == MAX_RETRIES) {
441 debug_msg(npe, "Timeout sending message\n");
446 debug_msg(npe, "Sending a message took %i cycles\n", cycles);
451 int npe_recv_message(struct npe *npe, void *msg, const char *what)
454 int cycles = 0, cnt = 0;
456 debug_msg(npe, "Trying to receive message %s\n", what);
458 while (cycles < MAX_RETRIES) {
459 if (__raw_readl(&npe->regs->messaging_status) & MSGSTAT_OFNE) {
460 recv[cnt++] = __raw_readl(&npe->regs->in_out_fifo);
471 debug_msg(npe, "Received [%08X]\n", recv[0]);
474 debug_msg(npe, "Received [%08X:%08X]\n", recv[0], recv[1]);
478 if (cycles == MAX_RETRIES) {
479 debug_msg(npe, "Timeout waiting for message\n");
484 debug_msg(npe, "Receiving a message took %i cycles\n", cycles);
489 int npe_send_recv_message(struct npe *npe, void *msg, const char *what)
492 u32 *send = msg, recv[2];
494 if ((result = npe_send_message(npe, msg, what)) != 0)
496 if ((result = npe_recv_message(npe, recv, what)) != 0)
499 if ((recv[0] != send[0]) || (recv[1] != send[1])) {
500 debug_msg(npe, "Message %s: unexpected message received\n",
508 int npe_load_firmware(struct npe *npe, const char *name, struct device *dev)
510 const struct firmware *fw_entry;
523 struct dl_block blocks[0];
527 struct dl_codeblock {
533 int i, j, err, data_size, instr_size, blocks, table_end;
536 if ((err = request_firmware(&fw_entry, name, dev)) != 0)
540 if (fw_entry->size < sizeof(struct dl_image)) {
541 print_npe(KERN_ERR, npe, "incomplete firmware file\n");
544 image = (struct dl_image*)fw_entry->data;
547 print_npe(KERN_DEBUG, npe, "firmware: %08X %08X %08X (0x%X bytes)\n",
548 image->magic, image->id, image->size, image->size * 4);
551 if (image->magic == swab32(FW_MAGIC)) { /* swapped file */
552 image->id = swab32(image->id);
553 image->size = swab32(image->size);
554 } else if (image->magic != FW_MAGIC) {
555 print_npe(KERN_ERR, npe, "bad firmware file magic: 0x%X\n",
559 if ((image->size * 4 + sizeof(struct dl_image)) != fw_entry->size) {
560 print_npe(KERN_ERR, npe,
561 "inconsistent size of firmware file\n");
564 if (((image->id >> 24) & 0xF /* NPE ID */) != npe->id) {
565 print_npe(KERN_ERR, npe, "firmware file NPE ID mismatch\n");
568 if (image->magic == swab32(FW_MAGIC))
569 for (i = 0; i < image->size; i++)
570 image->data[i] = swab32(image->data[i]);
572 if (cpu_is_ixp42x() && ((image->id >> 28) & 0xF /* device ID */)) {
573 print_npe(KERN_INFO, npe, "IXP43x/IXP46x firmware ignored on "
578 if (npe_running(npe)) {
579 print_npe(KERN_INFO, npe, "unable to load firmware, NPE is "
580 "already running\n");
589 print_npe(KERN_INFO, npe, "firmware functionality 0x%X, "
590 "revision 0x%X:%X\n", (image->id >> 16) & 0xFF,
591 (image->id >> 8) & 0xFF, image->id & 0xFF);
593 if (cpu_is_ixp42x()) {
595 instr_size = NPE_A_42X_INSTR_SIZE;
597 instr_size = NPE_B_AND_C_42X_INSTR_SIZE;
598 data_size = NPE_42X_DATA_SIZE;
600 instr_size = NPE_46X_INSTR_SIZE;
601 data_size = NPE_46X_DATA_SIZE;
604 for (blocks = 0; blocks * sizeof(struct dl_block) / 4 < image->size;
606 if (image->blocks[blocks].type == FW_BLOCK_TYPE_EOF)
608 if (blocks * sizeof(struct dl_block) / 4 >= image->size) {
609 print_npe(KERN_INFO, npe, "firmware EOF block marker not "
615 print_npe(KERN_DEBUG, npe, "%i firmware blocks found\n", blocks);
618 table_end = blocks * sizeof(struct dl_block) / 4 + 1 /* EOF marker */;
619 for (i = 0, blk = image->blocks; i < blocks; i++, blk++) {
620 if (blk->offset > image->size - sizeof(struct dl_codeblock) / 4
621 || blk->offset < table_end) {
622 print_npe(KERN_INFO, npe, "invalid offset 0x%X of "
623 "firmware block #%i\n", blk->offset, i);
627 cb = (struct dl_codeblock*)&image->data[blk->offset];
628 if (blk->type == FW_BLOCK_TYPE_INSTR) {
629 if (cb->npe_addr + cb->size > instr_size)
631 cmd = CMD_WR_INS_MEM;
632 } else if (blk->type == FW_BLOCK_TYPE_DATA) {
633 if (cb->npe_addr + cb->size > data_size)
635 cmd = CMD_WR_DATA_MEM;
637 print_npe(KERN_INFO, npe, "invalid firmware block #%i "
638 "type 0x%X\n", i, blk->type);
641 if (blk->offset + sizeof(*cb) / 4 + cb->size > image->size) {
642 print_npe(KERN_INFO, npe, "firmware block #%i doesn't "
643 "fit in firmware image: type %c, start 0x%X,"
645 blk->type == FW_BLOCK_TYPE_INSTR ? 'I' : 'D',
646 cb->npe_addr, cb->size);
650 for (j = 0; j < cb->size; j++)
651 npe_cmd_write(npe, cb->npe_addr + j, cmd, cb->data[j]);
655 if (!npe_running(npe))
656 print_npe(KERN_ERR, npe, "unable to start\n");
657 release_firmware(fw_entry);
661 print_npe(KERN_INFO, npe, "firmware block #%i doesn't fit in NPE "
662 "memory: type %c, start 0x%X, length 0x%X\n", i,
663 blk->type == FW_BLOCK_TYPE_INSTR ? 'I' : 'D',
664 cb->npe_addr, cb->size);
666 release_firmware(fw_entry);
671 struct npe *npe_request(unsigned id)
674 if (npe_tab[id].valid)
675 if (try_module_get(THIS_MODULE))
680 void npe_release(struct npe *npe)
682 module_put(THIS_MODULE);
685 static int ixp4xx_npe_probe(struct platform_device *pdev)
688 struct device *dev = &pdev->dev;
689 struct device_node *np = dev->of_node;
690 struct resource *res;
694 /* This system has only one syscon, so fetch it */
695 rmap = syscon_regmap_lookup_by_compatible("syscon");
697 return dev_err_probe(dev, PTR_ERR(rmap),
698 "failed to look up syscon\n");
700 for (i = 0; i < NPE_COUNT; i++) {
701 struct npe *npe = &npe_tab[i];
703 res = platform_get_resource(pdev, IORESOURCE_MEM, i);
707 val = cpu_ixp4xx_features(rmap);
709 if (!(val & (IXP4XX_FEATURE_RESET_NPEA << i))) {
710 dev_info(dev, "NPE%d at %pR not available\n",
712 continue; /* NPE already disabled or not present */
714 npe->regs = devm_ioremap_resource(dev, res);
715 if (IS_ERR(npe->regs))
716 return PTR_ERR(npe->regs);
719 if (npe_reset(npe)) {
720 dev_info(dev, "NPE%d at %pR does not reset\n",
725 dev_info(dev, "NPE%d at %pR registered\n", i, res);
732 /* Spawn crypto subdevice if using device tree */
733 if (IS_ENABLED(CONFIG_OF) && np)
734 devm_of_platform_populate(dev);
739 static int ixp4xx_npe_remove(struct platform_device *pdev)
743 for (i = 0; i < NPE_COUNT; i++)
744 if (npe_tab[i].regs) {
745 npe_reset(&npe_tab[i]);
751 static const struct of_device_id ixp4xx_npe_of_match[] = {
753 .compatible = "intel,ixp4xx-network-processing-engine",
758 static struct platform_driver ixp4xx_npe_driver = {
760 .name = "ixp4xx-npe",
761 .of_match_table = ixp4xx_npe_of_match,
763 .probe = ixp4xx_npe_probe,
764 .remove = ixp4xx_npe_remove,
766 module_platform_driver(ixp4xx_npe_driver);
768 MODULE_AUTHOR("Krzysztof Halasa");
769 MODULE_LICENSE("GPL v2");
770 MODULE_FIRMWARE(NPE_A_FIRMWARE);
771 MODULE_FIRMWARE(NPE_B_FIRMWARE);
772 MODULE_FIRMWARE(NPE_C_FIRMWARE);
774 EXPORT_SYMBOL(npe_names);
775 EXPORT_SYMBOL(npe_running);
776 EXPORT_SYMBOL(npe_request);
777 EXPORT_SYMBOL(npe_release);
778 EXPORT_SYMBOL(npe_load_firmware);
779 EXPORT_SYMBOL(npe_send_message);
780 EXPORT_SYMBOL(npe_recv_message);
781 EXPORT_SYMBOL(npe_send_recv_message);