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powerpc: Drop probecpu() in favour of arch_cpu_init()
[people/ms/u-boot.git] / arch / powerpc / cpu / mpc8xx / scc.c
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ed247f48
WD		 1/*
2 * File: scc.c
3 * Description:
53677ef1 4 * Basic ET HW initialization and packet RX/TX routines
ed247f48
WD		 5 *
6 * NOTE <<<IMPORTANT: PLEASE READ>>>:
7 * Do not cache Rx/Tx buffers!
8 */
9
10/*
11 * MPC823 <-> MC68160 Connections:
12 *
13 * Setup MPC823 to work with MC68160 Enhanced Ethernet
14 * Serial Tranceiver as follows:
15 *
16 * MPC823 Signal MC68160 Comments
17 * ------ ------ ------- --------
18 * PA-12 ETHTX --------> TX Eth. Port Transmit Data
19 * PB-18 E_TENA --------> TENA Eth. Transmit Port Enable
20 * PA-5 ETHTCK <-------- TCLK Eth. Port Transmit Clock
21 * PA-13 ETHRX <-------- RX Eth. Port Receive Data
22 * PC-8 E_RENA <-------- RENA Eth. Receive Enable
23 * PA-6 ETHRCK <-------- RCLK Eth. Port Receive Clock
24 * PC-9 E_CLSN <-------- CLSN Eth. Port Collision Indication
25 *
26 * FADS Board Signal MC68160 Comments
27 * ----------------- ------- --------
28 * (BCSR1) ETHEN* --------> CS2 Eth. Port Enable
29 * (BSCR4) TPSQEL* --------> TPSQEL Twisted Pair Signal Quality Error Test Enable
30 * (BCSR4) TPFLDL* --------> TPFLDL Twisted Pair Full-Duplex
31 * (BCSR4) ETHLOOP --------> LOOP Eth. Port Diagnostic Loop-Back
32 *
33 */
34
35#include <common.h>
36#include <malloc.h>
37#include <commproc.h>
38#include <net.h>
39#include <command.h>
40
4431283c 41#if defined(CONFIG_CMD_NET) && defined(SCC_ENET)
ed247f48
WD		 42
43/* Ethernet Transmit and Receive Buffers */
44#define DBUF_LENGTH 1520
45
46#define TX_BUF_CNT 2
47
2729af9d 48#define TOUT_LOOP 10000 /* 10 ms to have a packet sent */
ed247f48
WD		 49
50static char txbuf[DBUF_LENGTH];
51
52static uint rxIdx; /* index of the current RX buffer */
53static uint txIdx; /* index of the current TX buffer */
54
55/*
56 * SCC Ethernet Tx and Rx buffer descriptors allocated at the
57 * immr->udata_bd address on Dual-Port RAM
58 * Provide for Double Buffering
59 */
60
61typedef volatile struct CommonBufferDescriptor {
62 cbd_t rxbd[PKTBUFSRX]; /* Rx BD */
63 cbd_t txbd[TX_BUF_CNT]; /* Tx BD */
64} RTXBD;
65
66static RTXBD *rtx;
67
1b10d071 68static int scc_send(struct eth_device *dev, void *packet, int length);
ed247f48
WD		 69static int scc_recv(struct eth_device* dev);
70static int scc_init (struct eth_device* dev, bd_t * bd);
71static void scc_halt(struct eth_device* dev);
72
73int scc_initialize(bd_t *bis)
74{
75 struct eth_device* dev;
76
77 dev = (struct eth_device*) malloc(sizeof *dev);
7f6c2cbc 78 memset(dev, 0, sizeof *dev);
ed247f48 79
192bc694 80 strcpy(dev->name, "SCC");
ed247f48
WD		 81 dev->iobase = 0;
82 dev->priv = 0;
83 dev->init = scc_init;
84 dev->halt = scc_halt;
85 dev->send = scc_send;
86 dev->recv = scc_recv;
87
88 eth_register(dev);
89
90 return 1;
91}
92
1b10d071 93static int scc_send(struct eth_device *dev, void *packet, int length)
ed247f48
WD		 94{
95 int i, j=0;
96#if 0
97 volatile char *in, *out;
98#endif
99
100 /* section 16.9.23.3
101 * Wait for ready
102 */
103#if 0
104 while (rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_READY);
105 out = (char *)(rtx->txbd[txIdx].cbd_bufaddr);
106 in = packet;
107 for(i = 0; i < length; i++) {
108 *out++ = *in++;
109 }
110 rtx->txbd[txIdx].cbd_datlen = length;
111 rtx->txbd[txIdx].cbd_sc |= (BD_ENET_TX_READY | BD_ENET_TX_LAST);
112 while (rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_READY) j++;
113
114#ifdef ET_DEBUG
115 printf("cycles: %d status: %x\n", j, rtx->txbd[txIdx].cbd_sc);
116#endif
117 i = (rtx->txbd[txIdx++].cbd_sc & BD_ENET_TX_STATS) /* return only status bits */;
118
119 /* wrap around buffer index when necessary */
120 if (txIdx >= TX_BUF_CNT) txIdx = 0;
121#endif
122
123 while ((rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_READY) && (j<TOUT_LOOP)) {
124 udelay (1); /* will also trigger Wd if needed */
125 j++;
126 }
127 if (j>=TOUT_LOOP) printf("TX not ready\n");
128 rtx->txbd[txIdx].cbd_bufaddr = (uint)packet;
129 rtx->txbd[txIdx].cbd_datlen = length;
130 rtx->txbd[txIdx].cbd_sc |= (BD_ENET_TX_READY | BD_ENET_TX_LAST |BD_ENET_TX_WRAP);
131 while ((rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_READY) && (j<TOUT_LOOP)) {
132 udelay (1); /* will also trigger Wd if needed */
133 j++;
134 }
135 if (j>=TOUT_LOOP) printf("TX timeout\n");
136#ifdef ET_DEBUG
137 printf("cycles: %d status: %x\n", j, rtx->txbd[txIdx].cbd_sc);
138#endif
139 i = (rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_STATS) /* return only status bits */;
140 return i;
141}
142
3bbc899f 143static int scc_recv (struct eth_device *dev)
ed247f48
WD		 144{
145 int length;
146
3bbc899f
WD		 147 for (;;) {
148 /* section 16.9.23.2 */
149 if (rtx->rxbd[rxIdx].cbd_sc & BD_ENET_RX_EMPTY) {
150 length = -1;
151 break; /* nothing received - leave for() loop */
152 }
ed247f48 153
3bbc899f 154 length = rtx->rxbd[rxIdx].cbd_datlen;
ed247f48 155
3bbc899f 156 if (rtx->rxbd[rxIdx].cbd_sc & 0x003f) {
ed247f48 157#ifdef ET_DEBUG
3bbc899f 158 printf ("err: %x\n", rtx->rxbd[rxIdx].cbd_sc);
ed247f48 159#endif
3bbc899f
WD		 160 } else {
161 /* Pass the packet up to the protocol layers. */
1fd92db8
JH		 162 net_process_received_packet(net_rx_packets[rxIdx],
163 length - 4);
3bbc899f
WD		 164 }
165
166
167 /* Give the buffer back to the SCC. */
168 rtx->rxbd[rxIdx].cbd_datlen = 0;
169
170 /* wrap around buffer index when necessary */
171 if ((rxIdx + 1) >= PKTBUFSRX) {
172 rtx->rxbd[PKTBUFSRX - 1].cbd_sc =
173 (BD_ENET_RX_WRAP | BD_ENET_RX_EMPTY);
174 rxIdx = 0;
175 } else {
176 rtx->rxbd[rxIdx].cbd_sc = BD_ENET_RX_EMPTY;
177 rxIdx++;
178 }
ed247f48 179 }
3bbc899f 180 return length;
ed247f48
WD		 181}
182
183/**************************************************************
184 *
185 * SCC Ethernet Initialization Routine
186 *
187 *************************************************************/
188
3bbc899f 189static int scc_init (struct eth_device *dev, bd_t * bis)
ed247f48
WD		 190{
191
3bbc899f
WD		 192 int i;
193 scc_enet_t *pram_ptr;
ed247f48 194
6d0f6bcf 195 volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
ed247f48 196
3bbc899f 197 pram_ptr = (scc_enet_t *) & (immr->im_cpm.cp_dparam[PROFF_ENET]);
ed247f48 198
3bbc899f
WD		 199 rxIdx = 0;
200 txIdx = 0;
ed247f48 201
5fdc215f 202 if (!rtx) {
6d0f6bcf 203#ifdef CONFIG_SYS_ALLOC_DPRAM
5fdc215f
WD		 204 rtx = (RTXBD *) (immr->im_cpm.cp_dpmem +
205 dpram_alloc_align (sizeof (RTXBD), 8));
ed247f48 206#else
5fdc215f
WD		 207 rtx = (RTXBD *) (immr->im_cpm.cp_dpmem + CPM_SCC_BASE);
208#endif
209 }
ed247f48
WD		 210
211#if (defined(PA_ENET_RXD) && defined(PA_ENET_TXD))
3bbc899f
WD		 212 /* Configure port A pins for Txd and Rxd.
213 */
214 immr->im_ioport.iop_papar |= (PA_ENET_RXD | PA_ENET_TXD);
215 immr->im_ioport.iop_padir &= ~(PA_ENET_RXD | PA_ENET_TXD);
216 immr->im_ioport.iop_paodr &= ~PA_ENET_TXD;
ed247f48 217#elif (defined(PB_ENET_RXD) && defined(PB_ENET_TXD))
3bbc899f
WD		 218 /* Configure port B pins for Txd and Rxd.
219 */
220 immr->im_cpm.cp_pbpar |= (PB_ENET_RXD | PB_ENET_TXD);
221 immr->im_cpm.cp_pbdir &= ~(PB_ENET_RXD | PB_ENET_TXD);
222 immr->im_cpm.cp_pbodr &= ~PB_ENET_TXD;
ed247f48
WD		 223#else
224#error Configuration Error: exactly ONE of PA_ENET_[RT]XD, PB_ENET_[RT]XD must be defined
225#endif
226
227#if defined(PC_ENET_LBK)
3bbc899f
WD		 228 /* Configure port C pins to disable External Loopback
229 */
230 immr->im_ioport.iop_pcpar &= ~PC_ENET_LBK;
231 immr->im_ioport.iop_pcdir |= PC_ENET_LBK;
232 immr->im_ioport.iop_pcso &= ~PC_ENET_LBK;
233 immr->im_ioport.iop_pcdat &= ~PC_ENET_LBK; /* Disable Loopback */
234#endif /* PC_ENET_LBK */
235
236 /* Configure port C pins to enable CLSN and RENA.
237 */
238 immr->im_ioport.iop_pcpar &= ~(PC_ENET_CLSN | PC_ENET_RENA);
239 immr->im_ioport.iop_pcdir &= ~(PC_ENET_CLSN | PC_ENET_RENA);
240 immr->im_ioport.iop_pcso |= (PC_ENET_CLSN | PC_ENET_RENA);
241
242 /* Configure port A for TCLK and RCLK.
243 */
244 immr->im_ioport.iop_papar |= (PA_ENET_TCLK | PA_ENET_RCLK);
245 immr->im_ioport.iop_padir &= ~(PA_ENET_TCLK | PA_ENET_RCLK);
246
247 /*
248 * Configure Serial Interface clock routing -- see section 16.7.5.3
249 * First, clear all SCC bits to zero, then set the ones we want.
250 */
251
252 immr->im_cpm.cp_sicr &= ~SICR_ENET_MASK;
253 immr->im_cpm.cp_sicr |= SICR_ENET_CLKRT;
254
255
256 /*
257 * Initialize SDCR -- see section 16.9.23.7
258 * SDMA configuration register
259 */
260 immr->im_siu_conf.sc_sdcr = 0x01;
261
262
263 /*
264 * Setup SCC Ethernet Parameter RAM
265 */
266
267 pram_ptr->sen_genscc.scc_rfcr = 0x18; /* Normal Operation and Mot byte ordering */
268 pram_ptr->sen_genscc.scc_tfcr = 0x18; /* Mot byte ordering, Normal access */
269
270 pram_ptr->sen_genscc.scc_mrblr = DBUF_LENGTH; /* max. ET package len 1520 */
271
272 pram_ptr->sen_genscc.scc_rbase = (unsigned int) (&rtx->rxbd[0]); /* Set RXBD tbl start at Dual Port */
273 pram_ptr->sen_genscc.scc_tbase = (unsigned int) (&rtx->txbd[0]); /* Set TXBD tbl start at Dual Port */
274
275 /*
276 * Setup Receiver Buffer Descriptors (13.14.24.18)
277 * Settings:
278 * Empty, Wrap
279 */
280
281 for (i = 0; i < PKTBUFSRX; i++) {
282 rtx->rxbd[i].cbd_sc = BD_ENET_RX_EMPTY;
283 rtx->rxbd[i].cbd_datlen = 0; /* Reset */
1fd92db8 284 rtx->rxbd[i].cbd_bufaddr = (uint) net_rx_packets[i];
3bbc899f
WD		 285 }
286
287 rtx->rxbd[PKTBUFSRX - 1].cbd_sc |= BD_ENET_RX_WRAP;
288
289 /*
290 * Setup Ethernet Transmitter Buffer Descriptors (13.14.24.19)
291 * Settings:
292 * Add PADs to Short FRAMES, Wrap, Last, Tx CRC
293 */
294
295 for (i = 0; i < TX_BUF_CNT; i++) {
296 rtx->txbd[i].cbd_sc =
297 (BD_ENET_TX_PAD | BD_ENET_TX_LAST | BD_ENET_TX_TC);
298 rtx->txbd[i].cbd_datlen = 0; /* Reset */
299 rtx->txbd[i].cbd_bufaddr = (uint) (&txbuf[0]);
300 }
301
302 rtx->txbd[TX_BUF_CNT - 1].cbd_sc |= BD_ENET_TX_WRAP;
303
304 /*
305 * Enter Command: Initialize Rx Params for SCC
306 */
307
308 do { /* Spin until ready to issue command */
309 __asm__ ("eieio");
310 } while (immr->im_cpm.cp_cpcr & CPM_CR_FLG);
311 /* Issue command */
312 immr->im_cpm.cp_cpcr =
313 ((CPM_CR_INIT_RX << 8) | (CPM_CR_ENET << 4) | CPM_CR_FLG);
314 do { /* Spin until command processed */
315 __asm__ ("eieio");
316 } while (immr->im_cpm.cp_cpcr & CPM_CR_FLG);
317
318 /*
319 * Ethernet Specific Parameter RAM
320 * see table 13-16, pg. 660,
321 * pg. 681 (example with suggested settings)
322 */
323
324 pram_ptr->sen_cpres = ~(0x0); /* Preset CRC */
325 pram_ptr->sen_cmask = 0xdebb20e3; /* Constant Mask for CRC */
326 pram_ptr->sen_crcec = 0x0; /* Error Counter CRC (unused) */
327 pram_ptr->sen_alec = 0x0; /* Alignment Error Counter (unused) */
328 pram_ptr->sen_disfc = 0x0; /* Discard Frame Counter (unused) */
329 pram_ptr->sen_pads = 0x8888; /* Short Frame PAD Characters */
330
331 pram_ptr->sen_retlim = 15; /* Retry Limit Threshold */
332 pram_ptr->sen_maxflr = 1518; /* MAX Frame Length Register */
333 pram_ptr->sen_minflr = 64; /* MIN Frame Length Register */
334
335 pram_ptr->sen_maxd1 = DBUF_LENGTH; /* MAX DMA1 Length Register */
336 pram_ptr->sen_maxd2 = DBUF_LENGTH; /* MAX DMA2 Length Register */
337
338 pram_ptr->sen_gaddr1 = 0x0; /* Group Address Filter 1 (unused) */
339 pram_ptr->sen_gaddr2 = 0x0; /* Group Address Filter 2 (unused) */
340 pram_ptr->sen_gaddr3 = 0x0; /* Group Address Filter 3 (unused) */
341 pram_ptr->sen_gaddr4 = 0x0; /* Group Address Filter 4 (unused) */
ed247f48 342
8b2c9a71 343#define ea eth_get_ethaddr()
3bbc899f
WD		 344 pram_ptr->sen_paddrh = (ea[5] << 8) + ea[4];
345 pram_ptr->sen_paddrm = (ea[3] << 8) + ea[2];
346 pram_ptr->sen_paddrl = (ea[1] << 8) + ea[0];
ed247f48
WD		 347#undef ea
348
3bbc899f
WD		 349 pram_ptr->sen_pper = 0x0; /* Persistence (unused) */
350 pram_ptr->sen_iaddr1 = 0x0; /* Individual Address Filter 1 (unused) */
351 pram_ptr->sen_iaddr2 = 0x0; /* Individual Address Filter 2 (unused) */
352 pram_ptr->sen_iaddr3 = 0x0; /* Individual Address Filter 3 (unused) */
353 pram_ptr->sen_iaddr4 = 0x0; /* Individual Address Filter 4 (unused) */
354 pram_ptr->sen_taddrh = 0x0; /* Tmp Address (MSB) (unused) */
355 pram_ptr->sen_taddrm = 0x0; /* Tmp Address (unused) */
356 pram_ptr->sen_taddrl = 0x0; /* Tmp Address (LSB) (unused) */
357
358 /*
359 * Enter Command: Initialize Tx Params for SCC
360 */
361
362 do { /* Spin until ready to issue command */
363 __asm__ ("eieio");
364 } while (immr->im_cpm.cp_cpcr & CPM_CR_FLG);
365 /* Issue command */
366 immr->im_cpm.cp_cpcr =
367 ((CPM_CR_INIT_TX << 8) | (CPM_CR_ENET << 4) | CPM_CR_FLG);
368 do { /* Spin until command processed */
369 __asm__ ("eieio");
370 } while (immr->im_cpm.cp_cpcr & CPM_CR_FLG);
371
372 /*
373 * Mask all Events in SCCM - we use polling mode
374 */
375 immr->im_cpm.cp_scc[SCC_ENET].scc_sccm = 0;
376
377 /*
378 * Clear Events in SCCE -- Clear bits by writing 1's
379 */
380
381 immr->im_cpm.cp_scc[SCC_ENET].scc_scce = ~(0x0);
382
383
384 /*
385 * Initialize GSMR High 32-Bits
386 * Settings: Normal Mode
387 */
388
389 immr->im_cpm.cp_scc[SCC_ENET].scc_gsmrh = 0;
390
391 /*
392 * Initialize GSMR Low 32-Bits, but do not Enable Transmit/Receive
393 * Settings:
394 * TCI = Invert
395 * TPL = 48 bits
396 * TPP = Repeating 10's
397 * MODE = Ethernet
398 */
399
400 immr->im_cpm.cp_scc[SCC_ENET].scc_gsmrl = (SCC_GSMRL_TCI |
401 SCC_GSMRL_TPL_48 |
402 SCC_GSMRL_TPP_10 |
403 SCC_GSMRL_MODE_ENET);
404
405 /*
406 * Initialize the DSR -- see section 13.14.4 (pg. 513) v0.4
407 */
408
409 immr->im_cpm.cp_scc[SCC_ENET].scc_dsr = 0xd555;
410
411 /*
412 * Initialize the PSMR
413 * Settings:
414 * CRC = 32-Bit CCITT
415 * NIB = Begin searching for SFD 22 bits after RENA
416 * FDE = Full Duplex Enable
417 * LPB = Loopback Enable (Needed when FDE is set)
418 * BRO = Reject broadcast packets
419 * PROMISCOUS = Catch all packets regardless of dest. MAC adress
420 */
421 immr->im_cpm.cp_scc[SCC_ENET].scc_psmr = SCC_PSMR_ENCRC |
422 SCC_PSMR_NIB22 |
ed247f48 423#if defined(CONFIG_SCC_ENET_FULL_DUPLEX)
3bbc899f 424 SCC_PSMR_FDE | SCC_PSMR_LPB |
ed247f48
WD		 425#endif
426#if defined(CONFIG_SCC_ENET_NO_BROADCAST)
3bbc899f 427 SCC_PSMR_BRO |
ed247f48
WD		 428#endif
429#if defined(CONFIG_SCC_ENET_PROMISCOUS)
3bbc899f 430 SCC_PSMR_PRO |
ed247f48 431#endif
3bbc899f 432 0;
ed247f48 433
3bbc899f
WD		 434 /*
435 * Configure Ethernet TENA Signal
436 */
ed247f48
WD		 437
438#if (defined(PC_ENET_TENA) && !defined(PB_ENET_TENA))
3bbc899f
WD		 439 immr->im_ioport.iop_pcpar |= PC_ENET_TENA;
440 immr->im_ioport.iop_pcdir &= ~PC_ENET_TENA;
ed247f48 441#elif (defined(PB_ENET_TENA) && !defined(PC_ENET_TENA))
3bbc899f
WD		 442 immr->im_cpm.cp_pbpar |= PB_ENET_TENA;
443 immr->im_cpm.cp_pbdir |= PB_ENET_TENA;
ed247f48
WD		 444#else
445#error Configuration Error: exactly ONE of PB_ENET_TENA, PC_ENET_TENA must be defined
ed247f48
WD		 446#endif
447
3bbc899f
WD		 448 /*
449 * Set the ENT/ENR bits in the GSMR Low -- Enable Transmit/Receive
450 */
ed247f48 451
3bbc899f
WD		 452 immr->im_cpm.cp_scc[SCC_ENET].scc_gsmrl |=
453 (SCC_GSMRL_ENR | SCC_GSMRL_ENT);
ed247f48 454
3bbc899f 455 return 1;
ed247f48
WD		 456}
457
458
3bbc899f 459static void scc_halt (struct eth_device *dev)
ed247f48 460{
6d0f6bcf 461 volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
3bbc899f
WD		 462
463 immr->im_cpm.cp_scc[SCC_ENET].scc_gsmrl &=
464 ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT);
281e00a3
WD		 465
466 immr->im_ioport.iop_pcso &= ~(PC_ENET_CLSN | PC_ENET_RENA);
ed247f48
WD		 467}
468
469#if 0
3bbc899f 470void restart (void)
ed247f48 471{
6d0f6bcf 472 volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
3bbc899f
WD		 473
474 immr->im_cpm.cp_scc[SCC_ENET].scc_gsmrl |=
475 (SCC_GSMRL_ENR | SCC_GSMRL_ENT);
ed247f48
WD		 476}
477#endif
068b60a0 478#endif
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