1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*  SuperH Ethernet device driver
3  *
4  *  Copyright (C) 2006-2012 Nobuhiro Iwamatsu
5  *  Copyright (C) 2008-2012 Renesas Solutions Corp.
6  */
7 
8 #ifndef __SH_ETH_H__
9 #define __SH_ETH_H__
10 
11 #define CARDNAME	"sh-eth"
12 #define TX_TIMEOUT	(5*HZ)
13 #define TX_RING_SIZE	64	/* Tx ring size */
14 #define RX_RING_SIZE	64	/* Rx ring size */
15 #define TX_RING_MIN	64
16 #define RX_RING_MIN	64
17 #define TX_RING_MAX	1024
18 #define RX_RING_MAX	1024
19 #define PKT_BUF_SZ	1538
20 #define SH_ETH_TSU_TIMEOUT_MS	500
21 #define SH_ETH_TSU_CAM_ENTRIES	32
22 
23 enum {
24 	/* IMPORTANT: To keep ethtool register dump working, add new
25 	 * register names immediately before SH_ETH_MAX_REGISTER_OFFSET.
26 	 */
27 
28 	/* E-DMAC registers */
29 	EDSR = 0,
30 	EDMR,
31 	EDTRR,
32 	EDRRR,
33 	EESR,
34 	EESIPR,
35 	TDLAR,
36 	TDFAR,
37 	TDFXR,
38 	TDFFR,
39 	RDLAR,
40 	RDFAR,
41 	RDFXR,
42 	RDFFR,
43 	TRSCER,
44 	RMFCR,
45 	TFTR,
46 	FDR,
47 	RMCR,
48 	EDOCR,
49 	TFUCR,
50 	RFOCR,
51 	RMIIMODE,
52 	FCFTR,
53 	RPADIR,
54 	TRIMD,
55 	RBWAR,
56 	TBRAR,
57 
58 	/* Ether registers */
59 	ECMR,
60 	ECSR,
61 	ECSIPR,
62 	PIR,
63 	PSR,
64 	RDMLR,
65 	PIPR,
66 	RFLR,
67 	IPGR,
68 	APR,
69 	MPR,
70 	PFTCR,
71 	PFRCR,
72 	RFCR,
73 	RFCF,
74 	TPAUSER,
75 	TPAUSECR,
76 	BCFR,
77 	BCFRR,
78 	GECMR,
79 	BCULR,
80 	MAHR,
81 	MALR,
82 	TROCR,
83 	CDCR,
84 	LCCR,
85 	CNDCR,
86 	CEFCR,
87 	FRECR,
88 	TSFRCR,
89 	TLFRCR,
90 	CERCR,
91 	CEECR,
92 	MAFCR,
93 	RTRATE,
94 	CSMR,
95 	RMII_MII,
96 
97 	/* TSU Absolute address */
98 	ARSTR,
99 	TSU_CTRST,
100 	TSU_FWEN0,
101 	TSU_FWEN1,
102 	TSU_FCM,
103 	TSU_BSYSL0,
104 	TSU_BSYSL1,
105 	TSU_PRISL0,
106 	TSU_PRISL1,
107 	TSU_FWSL0,
108 	TSU_FWSL1,
109 	TSU_FWSLC,
110 	TSU_QTAG0,			/* Same as TSU_QTAGM0 */
111 	TSU_QTAG1,			/* Same as TSU_QTAGM1 */
112 	TSU_QTAGM0,
113 	TSU_QTAGM1,
114 	TSU_FWSR,
115 	TSU_FWINMK,
116 	TSU_ADQT0,
117 	TSU_ADQT1,
118 	TSU_VTAG0,
119 	TSU_VTAG1,
120 	TSU_ADSBSY,
121 	TSU_TEN,
122 	TSU_POST1,
123 	TSU_POST2,
124 	TSU_POST3,
125 	TSU_POST4,
126 	TSU_ADRH0,
127 	/* TSU_ADR{H,L}{0..31} are assumed to be contiguous */
128 
129 	TXNLCR0,
130 	TXALCR0,
131 	RXNLCR0,
132 	RXALCR0,
133 	FWNLCR0,
134 	FWALCR0,
135 	TXNLCR1,
136 	TXALCR1,
137 	RXNLCR1,
138 	RXALCR1,
139 	FWNLCR1,
140 	FWALCR1,
141 
142 	/* This value must be written at last. */
143 	SH_ETH_MAX_REGISTER_OFFSET,
144 };
145 
146 enum {
147 	SH_ETH_REG_GIGABIT,
148 	SH_ETH_REG_FAST_RZ,
149 	SH_ETH_REG_FAST_RCAR,
150 	SH_ETH_REG_FAST_SH4,
151 	SH_ETH_REG_FAST_SH3_SH2
152 };
153 
154 /* Driver's parameters */
155 #if defined(CONFIG_CPU_SH4) || defined(CONFIG_ARCH_RENESAS)
156 #define SH_ETH_RX_ALIGN		32
157 #else
158 #define SH_ETH_RX_ALIGN		2
159 #endif
160 
161 /* Register's bits
162  */
163 /* EDSR : sh7734, sh7757, sh7763, r8a7740, and r7s72100 only */
164 enum EDSR_BIT {
165 	EDSR_ENT = 0x01, EDSR_ENR = 0x02,
166 };
167 #define EDSR_ENALL (EDSR_ENT|EDSR_ENR)
168 
169 /* GECMR : sh7734, sh7763 and r8a7740 only */
170 enum GECMR_BIT {
171 	GECMR_10 = 0x0, GECMR_100 = 0x04, GECMR_1000 = 0x01,
172 };
173 
174 /* EDMR */
175 enum DMAC_M_BIT {
176 	EDMR_NBST = 0x80,
177 	EDMR_EL = 0x40, /* Litte endian */
178 	EDMR_DL1 = 0x20, EDMR_DL0 = 0x10,
179 	EDMR_SRST_GETHER = 0x03,
180 	EDMR_SRST_ETHER = 0x01,
181 };
182 
183 /* EDTRR */
184 enum DMAC_T_BIT {
185 	EDTRR_TRNS_GETHER = 0x03,
186 	EDTRR_TRNS_ETHER = 0x01,
187 };
188 
189 /* EDRRR */
190 enum EDRRR_R_BIT {
191 	EDRRR_R = 0x01,
192 };
193 
194 /* TPAUSER */
195 enum TPAUSER_BIT {
196 	TPAUSER_TPAUSE = 0x0000ffff,
197 	TPAUSER_UNLIMITED = 0,
198 };
199 
200 /* BCFR */
201 enum BCFR_BIT {
202 	BCFR_RPAUSE = 0x0000ffff,
203 	BCFR_UNLIMITED = 0,
204 };
205 
206 /* PIR */
207 enum PIR_BIT {
208 	PIR_MDI = 0x08, PIR_MDO = 0x04, PIR_MMD = 0x02, PIR_MDC = 0x01,
209 };
210 
211 /* PSR */
212 enum PHY_STATUS_BIT { PHY_ST_LINK = 0x01, };
213 
214 /* EESR */
215 enum EESR_BIT {
216 	EESR_TWB1	= 0x80000000,
217 	EESR_TWB	= 0x40000000,	/* same as TWB0 */
218 	EESR_TC1	= 0x20000000,
219 	EESR_TUC	= 0x10000000,
220 	EESR_ROC	= 0x08000000,
221 	EESR_TABT	= 0x04000000,
222 	EESR_RABT	= 0x02000000,
223 	EESR_RFRMER	= 0x01000000,	/* same as RFCOF */
224 	EESR_ADE	= 0x00800000,
225 	EESR_ECI	= 0x00400000,
226 	EESR_FTC	= 0x00200000,	/* same as TC or TC0 */
227 	EESR_TDE	= 0x00100000,
228 	EESR_TFE	= 0x00080000,	/* same as TFUF */
229 	EESR_FRC	= 0x00040000,	/* same as FR */
230 	EESR_RDE	= 0x00020000,
231 	EESR_RFE	= 0x00010000,
232 	EESR_CND	= 0x00000800,
233 	EESR_DLC	= 0x00000400,
234 	EESR_CD		= 0x00000200,
235 	EESR_TRO	= 0x00000100,
236 	EESR_RMAF	= 0x00000080,
237 	EESR_CEEF	= 0x00000040,
238 	EESR_CELF	= 0x00000020,
239 	EESR_RRF	= 0x00000010,
240 	EESR_RTLF	= 0x00000008,
241 	EESR_RTSF	= 0x00000004,
242 	EESR_PRE	= 0x00000002,
243 	EESR_CERF	= 0x00000001,
244 };
245 
246 #define EESR_RX_CHECK		(EESR_FRC  | /* Frame recv */		\
247 				 EESR_RMAF | /* Multicast address recv */ \
248 				 EESR_RRF  | /* Bit frame recv */	\
249 				 EESR_RTLF | /* Long frame recv */	\
250 				 EESR_RTSF | /* Short frame recv */	\
251 				 EESR_PRE  | /* PHY-LSI recv error */	\
252 				 EESR_CERF)  /* Recv frame CRC error */
253 
254 #define DEFAULT_TX_CHECK	(EESR_FTC | EESR_CND | EESR_DLC | EESR_CD | \
255 				 EESR_TRO)
256 #define DEFAULT_EESR_ERR_CHECK	(EESR_TWB | EESR_TABT | EESR_RABT | EESR_RFE | \
257 				 EESR_RDE | EESR_RFRMER | EESR_ADE | \
258 				 EESR_TFE | EESR_TDE)
259 
260 /* EESIPR */
261 enum EESIPR_BIT {
262 	EESIPR_TWB1IP	= 0x80000000,
263 	EESIPR_TWBIP	= 0x40000000,	/* same as TWB0IP */
264 	EESIPR_TC1IP	= 0x20000000,
265 	EESIPR_TUCIP	= 0x10000000,
266 	EESIPR_ROCIP	= 0x08000000,
267 	EESIPR_TABTIP	= 0x04000000,
268 	EESIPR_RABTIP	= 0x02000000,
269 	EESIPR_RFCOFIP	= 0x01000000,
270 	EESIPR_ADEIP	= 0x00800000,
271 	EESIPR_ECIIP	= 0x00400000,
272 	EESIPR_FTCIP	= 0x00200000,	/* same as TC0IP */
273 	EESIPR_TDEIP	= 0x00100000,
274 	EESIPR_TFUFIP	= 0x00080000,
275 	EESIPR_FRIP	= 0x00040000,
276 	EESIPR_RDEIP	= 0x00020000,
277 	EESIPR_RFOFIP	= 0x00010000,
278 	EESIPR_CNDIP	= 0x00000800,
279 	EESIPR_DLCIP	= 0x00000400,
280 	EESIPR_CDIP	= 0x00000200,
281 	EESIPR_TROIP	= 0x00000100,
282 	EESIPR_RMAFIP	= 0x00000080,
283 	EESIPR_CEEFIP	= 0x00000040,
284 	EESIPR_CELFIP	= 0x00000020,
285 	EESIPR_RRFIP	= 0x00000010,
286 	EESIPR_RTLFIP	= 0x00000008,
287 	EESIPR_RTSFIP	= 0x00000004,
288 	EESIPR_PREIP	= 0x00000002,
289 	EESIPR_CERFIP	= 0x00000001,
290 };
291 
292 /* Receive descriptor 0 bits */
293 enum RD_STS_BIT {
294 	RD_RACT = 0x80000000, RD_RDLE = 0x40000000,
295 	RD_RFP1 = 0x20000000, RD_RFP0 = 0x10000000,
296 	RD_RFE = 0x08000000, RD_RFS10 = 0x00000200,
297 	RD_RFS9 = 0x00000100, RD_RFS8 = 0x00000080,
298 	RD_RFS7 = 0x00000040, RD_RFS6 = 0x00000020,
299 	RD_RFS5 = 0x00000010, RD_RFS4 = 0x00000008,
300 	RD_RFS3 = 0x00000004, RD_RFS2 = 0x00000002,
301 	RD_RFS1 = 0x00000001,
302 };
303 #define RDF1ST	RD_RFP1
304 #define RDFEND	RD_RFP0
305 #define RD_RFP	(RD_RFP1|RD_RFP0)
306 
307 /* Receive descriptor 1 bits */
308 enum RD_LEN_BIT {
309 	RD_RFL	= 0x0000ffff,	/* receive frame  length */
310 	RD_RBL	= 0xffff0000,	/* receive buffer length */
311 };
312 
313 /* FCFTR */
314 enum FCFTR_BIT {
315 	FCFTR_RFF2 = 0x00040000, FCFTR_RFF1 = 0x00020000,
316 	FCFTR_RFF0 = 0x00010000, FCFTR_RFD2 = 0x00000004,
317 	FCFTR_RFD1 = 0x00000002, FCFTR_RFD0 = 0x00000001,
318 };
319 #define DEFAULT_FIFO_F_D_RFF	(FCFTR_RFF2 | FCFTR_RFF1 | FCFTR_RFF0)
320 #define DEFAULT_FIFO_F_D_RFD	(FCFTR_RFD2 | FCFTR_RFD1 | FCFTR_RFD0)
321 
322 /* Transmit descriptor 0 bits */
323 enum TD_STS_BIT {
324 	TD_TACT = 0x80000000, TD_TDLE = 0x40000000,
325 	TD_TFP1 = 0x20000000, TD_TFP0 = 0x10000000,
326 	TD_TFE  = 0x08000000, TD_TWBI = 0x04000000,
327 };
328 #define TDF1ST	TD_TFP1
329 #define TDFEND	TD_TFP0
330 #define TD_TFP	(TD_TFP1|TD_TFP0)
331 
332 /* Transmit descriptor 1 bits */
333 enum TD_LEN_BIT {
334 	TD_TBL	= 0xffff0000,	/* transmit buffer length */
335 };
336 
337 /* RMCR */
338 enum RMCR_BIT {
339 	RMCR_RNC = 0x00000001,
340 };
341 
342 /* ECMR */
343 enum FELIC_MODE_BIT {
344 	ECMR_TRCCM = 0x04000000, ECMR_RCSC = 0x00800000,
345 	ECMR_DPAD = 0x00200000, ECMR_RZPF = 0x00100000,
346 	ECMR_ZPF = 0x00080000, ECMR_PFR = 0x00040000, ECMR_RXF = 0x00020000,
347 	ECMR_TXF = 0x00010000, ECMR_MCT = 0x00002000, ECMR_PRCEF = 0x00001000,
348 	ECMR_MPDE = 0x00000200, ECMR_RE = 0x00000040, ECMR_TE = 0x00000020,
349 	ECMR_RTM = 0x00000010, ECMR_ILB = 0x00000008, ECMR_ELB = 0x00000004,
350 	ECMR_DM = 0x00000002, ECMR_PRM = 0x00000001,
351 };
352 
353 /* ECSR */
354 enum ECSR_STATUS_BIT {
355 	ECSR_BRCRX = 0x20, ECSR_PSRTO = 0x10,
356 	ECSR_LCHNG = 0x04,
357 	ECSR_MPD = 0x02, ECSR_ICD = 0x01,
358 };
359 
360 #define DEFAULT_ECSR_INIT	(ECSR_BRCRX | ECSR_PSRTO | ECSR_LCHNG | \
361 				 ECSR_ICD | ECSIPR_MPDIP)
362 
363 /* ECSIPR */
364 enum ECSIPR_STATUS_MASK_BIT {
365 	ECSIPR_BRCRXIP = 0x20, ECSIPR_PSRTOIP = 0x10,
366 	ECSIPR_LCHNGIP = 0x04,
367 	ECSIPR_MPDIP = 0x02, ECSIPR_ICDIP = 0x01,
368 };
369 
370 #define DEFAULT_ECSIPR_INIT	(ECSIPR_BRCRXIP | ECSIPR_PSRTOIP | \
371 				 ECSIPR_LCHNGIP | ECSIPR_ICDIP | ECSIPR_MPDIP)
372 
373 /* APR */
374 enum APR_BIT {
375 	APR_AP = 0x0000ffff,
376 };
377 
378 /* MPR */
379 enum MPR_BIT {
380 	MPR_MP = 0x0000ffff,
381 };
382 
383 /* TRSCER */
384 enum DESC_I_BIT {
385 	DESC_I_TINT4 = 0x0800, DESC_I_TINT3 = 0x0400, DESC_I_TINT2 = 0x0200,
386 	DESC_I_TINT1 = 0x0100, DESC_I_RINT8 = 0x0080, DESC_I_RINT5 = 0x0010,
387 	DESC_I_RINT4 = 0x0008, DESC_I_RINT3 = 0x0004, DESC_I_RINT2 = 0x0002,
388 	DESC_I_RINT1 = 0x0001,
389 };
390 
391 #define DEFAULT_TRSCER_ERR_MASK (DESC_I_RINT8 | DESC_I_RINT5 | DESC_I_TINT2)
392 
393 /* RPADIR */
394 enum RPADIR_BIT {
395 	RPADIR_PADS = 0x1f0000, RPADIR_PADR = 0xffff,
396 };
397 
398 /* FDR */
399 #define DEFAULT_FDR_INIT	0x00000707
400 
401 /* ARSTR */
402 enum ARSTR_BIT { ARSTR_ARST = 0x00000001, };
403 
404 /* TSU_FWEN0 */
405 enum TSU_FWEN0_BIT {
406 	TSU_FWEN0_0 = 0x00000001,
407 };
408 
409 /* TSU_ADSBSY */
410 enum TSU_ADSBSY_BIT {
411 	TSU_ADSBSY_0 = 0x00000001,
412 };
413 
414 /* TSU_TEN */
415 enum TSU_TEN_BIT {
416 	TSU_TEN_0 = 0x80000000,
417 };
418 
419 /* TSU_FWSL0 */
420 enum TSU_FWSL0_BIT {
421 	TSU_FWSL0_FW50 = 0x1000, TSU_FWSL0_FW40 = 0x0800,
422 	TSU_FWSL0_FW30 = 0x0400, TSU_FWSL0_FW20 = 0x0200,
423 	TSU_FWSL0_FW10 = 0x0100, TSU_FWSL0_RMSA0 = 0x0010,
424 };
425 
426 /* TSU_FWSLC */
427 enum TSU_FWSLC_BIT {
428 	TSU_FWSLC_POSTENU = 0x2000, TSU_FWSLC_POSTENL = 0x1000,
429 	TSU_FWSLC_CAMSEL03 = 0x0080, TSU_FWSLC_CAMSEL02 = 0x0040,
430 	TSU_FWSLC_CAMSEL01 = 0x0020, TSU_FWSLC_CAMSEL00 = 0x0010,
431 	TSU_FWSLC_CAMSEL13 = 0x0008, TSU_FWSLC_CAMSEL12 = 0x0004,
432 	TSU_FWSLC_CAMSEL11 = 0x0002, TSU_FWSLC_CAMSEL10 = 0x0001,
433 };
434 
435 /* TSU_VTAGn */
436 #define TSU_VTAG_ENABLE		0x80000000
437 #define TSU_VTAG_VID_MASK	0x00000fff
438 
439 /* The sh ether Tx buffer descriptors.
440  * This structure should be 20 bytes.
441  */
442 struct sh_eth_txdesc {
443 	u32 status;		/* TD0 */
444 	u32 len;		/* TD1 */
445 	u32 addr;		/* TD2 */
446 	u32 pad0;		/* padding data */
447 } __aligned(2) __packed;
448 
449 /* The sh ether Rx buffer descriptors.
450  * This structure should be 20 bytes.
451  */
452 struct sh_eth_rxdesc {
453 	u32 status;		/* RD0 */
454 	u32 len;		/* RD1 */
455 	u32 addr;		/* RD2 */
456 	u32 pad0;		/* padding data */
457 } __aligned(2) __packed;
458 
459 /* This structure is used by each CPU dependency handling. */
460 struct sh_eth_cpu_data {
461 	/* mandatory functions */
462 	int (*soft_reset)(struct net_device *ndev);
463 
464 	/* optional functions */
465 	void (*chip_reset)(struct net_device *ndev);
466 	void (*set_duplex)(struct net_device *ndev);
467 	void (*set_rate)(struct net_device *ndev);
468 
469 	/* mandatory initialize value */
470 	int register_type;
471 	u32 edtrr_trns;
472 	u32 eesipr_value;
473 
474 	/* optional initialize value */
475 	u32 ecsr_value;
476 	u32 ecsipr_value;
477 	u32 fdr_value;
478 	u32 fcftr_value;
479 
480 	/* interrupt checking mask */
481 	u32 tx_check;
482 	u32 eesr_err_check;
483 
484 	/* Error mask */
485 	u32 trscer_err_mask;
486 
487 	/* hardware features */
488 	unsigned long irq_flags; /* IRQ configuration flags */
489 	unsigned no_psr:1;	/* EtherC DOES NOT have PSR */
490 	unsigned apr:1;		/* EtherC has APR */
491 	unsigned mpr:1;		/* EtherC has MPR */
492 	unsigned tpauser:1;	/* EtherC has TPAUSER */
493 	unsigned bculr:1;	/* EtherC has BCULR */
494 	unsigned tsu:1;		/* EtherC has TSU */
495 	unsigned hw_swap:1;	/* E-DMAC has DE bit in EDMR */
496 	unsigned nbst:1;	/* E-DMAC has NBST bit in EDMR */
497 	unsigned rpadir:1;	/* E-DMAC has RPADIR */
498 	unsigned no_trimd:1;	/* E-DMAC DOES NOT have TRIMD */
499 	unsigned no_ade:1;	/* E-DMAC DOES NOT have ADE bit in EESR */
500 	unsigned no_xdfar:1;	/* E-DMAC DOES NOT have RDFAR/TDFAR */
501 	unsigned xdfar_rw:1;	/* E-DMAC has writeable RDFAR/TDFAR */
502 	unsigned csmr:1;	/* E-DMAC has CSMR */
503 	unsigned rx_csum:1;	/* EtherC has ECMR.RCSC */
504 	unsigned select_mii:1;	/* EtherC has RMII_MII (MII select register) */
505 	unsigned rmiimode:1;	/* EtherC has RMIIMODE register */
506 	unsigned rtrate:1;	/* EtherC has RTRATE register */
507 	unsigned magic:1;	/* EtherC has ECMR.MPDE and ECSR.MPD */
508 	unsigned no_tx_cntrs:1;	/* EtherC DOES NOT have TX error counters */
509 	unsigned cexcr:1;	/* EtherC has CERCR/CEECR */
510 	unsigned dual_port:1;	/* Dual EtherC/E-DMAC */
511 };
512 
513 struct sh_eth_private {
514 	struct platform_device *pdev;
515 	struct sh_eth_cpu_data *cd;
516 	const u16 *reg_offset;
517 	void __iomem *addr;
518 	void __iomem *tsu_addr;
519 	struct clk *clk;
520 	u32 num_rx_ring;
521 	u32 num_tx_ring;
522 	dma_addr_t rx_desc_dma;
523 	dma_addr_t tx_desc_dma;
524 	struct sh_eth_rxdesc *rx_ring;
525 	struct sh_eth_txdesc *tx_ring;
526 	struct sk_buff **rx_skbuff;
527 	struct sk_buff **tx_skbuff;
528 	spinlock_t lock;		/* Register access lock */
529 	u32 cur_rx, dirty_rx;		/* Producer/consumer ring indices */
530 	u32 cur_tx, dirty_tx;
531 	u32 rx_buf_sz;			/* Based on MTU+slack. */
532 	struct napi_struct napi;
533 	bool irq_enabled;
534 	/* MII transceiver section. */
535 	u32 phy_id;			/* PHY ID */
536 	struct mii_bus *mii_bus;	/* MDIO bus control */
537 	int link;
538 	phy_interface_t phy_interface;
539 	int msg_enable;
540 	int speed;
541 	int duplex;
542 	int port;			/* for TSU */
543 	int vlan_num_ids;		/* for VLAN tag filter */
544 
545 	unsigned no_ether_link:1;
546 	unsigned ether_link_active_low:1;
547 	unsigned is_opened:1;
548 	unsigned wol_enabled:1;
549 };
550 
551 #endif	/* #ifndef __SH_ETH_H__ */
552