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[people/ms/u-boot.git] / drivers / net / davinci_emac.c
1 /*
2 * Ethernet driver for TI TMS320DM644x (DaVinci) chips.
3 *
4 * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
5 *
6 * Parts shamelessly stolen from TI's dm644x_emac.c. Original copyright
7 * follows:
8 *
9 * ----------------------------------------------------------------------------
10 *
11 * dm644x_emac.c
12 *
13 * TI DaVinci (DM644X) EMAC peripheral driver source for DV-EVM
14 *
15 * Copyright (C) 2005 Texas Instruments.
16 *
17 * ----------------------------------------------------------------------------
18 *
19 * SPDX-License-Identifier: GPL-2.0+
20 *
21 * Modifications:
22 * ver. 1.0: Sep 2005, Anant Gole - Created EMAC version for uBoot.
23 * ver 1.1: Nov 2005, Anant Gole - Extended the RX logic for multiple descriptors
24 */
25 #include <common.h>
26 #include <command.h>
27 #include <net.h>
28 #include <miiphy.h>
29 #include <malloc.h>
30 #include <netdev.h>
31 #include <linux/compiler.h>
32 #include <asm/arch/emac_defs.h>
33 #include <asm/io.h>
34 #include "davinci_emac.h"
35
36 unsigned int emac_dbg = 0;
37 #define debug_emac(fmt,args...) if (emac_dbg) printf(fmt,##args)
38
39 #ifdef EMAC_HW_RAM_ADDR
40 static inline unsigned long BD_TO_HW(unsigned long x)
41 {
42 if (x == 0)
43 return 0;
44
45 return x - EMAC_WRAPPER_RAM_ADDR + EMAC_HW_RAM_ADDR;
46 }
47
48 static inline unsigned long HW_TO_BD(unsigned long x)
49 {
50 if (x == 0)
51 return 0;
52
53 return x - EMAC_HW_RAM_ADDR + EMAC_WRAPPER_RAM_ADDR;
54 }
55 #else
56 #define BD_TO_HW(x) (x)
57 #define HW_TO_BD(x) (x)
58 #endif
59
60 #ifdef DAVINCI_EMAC_GIG_ENABLE
61 #define emac_gigabit_enable(phy_addr) davinci_eth_gigabit_enable(phy_addr)
62 #else
63 #define emac_gigabit_enable(phy_addr) /* no gigabit to enable */
64 #endif
65
66 #if !defined(CONFIG_SYS_EMAC_TI_CLKDIV)
67 #define CONFIG_SYS_EMAC_TI_CLKDIV ((EMAC_MDIO_BUS_FREQ / \
68 EMAC_MDIO_CLOCK_FREQ) - 1)
69 #endif
70
71 static void davinci_eth_mdio_enable(void);
72
73 static int gen_init_phy(int phy_addr);
74 static int gen_is_phy_connected(int phy_addr);
75 static int gen_get_link_speed(int phy_addr);
76 static int gen_auto_negotiate(int phy_addr);
77
78 void eth_mdio_enable(void)
79 {
80 davinci_eth_mdio_enable();
81 }
82
83 /* EMAC Addresses */
84 static volatile emac_regs *adap_emac = (emac_regs *)EMAC_BASE_ADDR;
85 static volatile ewrap_regs *adap_ewrap = (ewrap_regs *)EMAC_WRAPPER_BASE_ADDR;
86 static volatile mdio_regs *adap_mdio = (mdio_regs *)EMAC_MDIO_BASE_ADDR;
87
88 /* EMAC descriptors */
89 static volatile emac_desc *emac_rx_desc = (emac_desc *)(EMAC_WRAPPER_RAM_ADDR + EMAC_RX_DESC_BASE);
90 static volatile emac_desc *emac_tx_desc = (emac_desc *)(EMAC_WRAPPER_RAM_ADDR + EMAC_TX_DESC_BASE);
91 static volatile emac_desc *emac_rx_active_head = 0;
92 static volatile emac_desc *emac_rx_active_tail = 0;
93 static int emac_rx_queue_active = 0;
94
95 /* Receive packet buffers */
96 static unsigned char emac_rx_buffers[EMAC_MAX_RX_BUFFERS * EMAC_RXBUF_SIZE]
97 __aligned(ARCH_DMA_MINALIGN);
98
99 #ifndef CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT
100 #define CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT 3
101 #endif
102
103 /* PHY address for a discovered PHY (0xff - not found) */
104 static u_int8_t active_phy_addr[CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT];
105
106 /* number of PHY found active */
107 static u_int8_t num_phy;
108
109 phy_t phy[CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT];
110
111 static int davinci_eth_set_mac_addr(struct eth_device *dev)
112 {
113 unsigned long mac_hi;
114 unsigned long mac_lo;
115
116 /*
117 * Set MAC Addresses & Init multicast Hash to 0 (disable any multicast
118 * receive)
119 * Using channel 0 only - other channels are disabled
120 * */
121 writel(0, &adap_emac->MACINDEX);
122 mac_hi = (dev->enetaddr[3] << 24) |
123 (dev->enetaddr[2] << 16) |
124 (dev->enetaddr[1] << 8) |
125 (dev->enetaddr[0]);
126 mac_lo = (dev->enetaddr[5] << 8) |
127 (dev->enetaddr[4]);
128
129 writel(mac_hi, &adap_emac->MACADDRHI);
130 #if defined(DAVINCI_EMAC_VERSION2)
131 writel(mac_lo | EMAC_MAC_ADDR_IS_VALID | EMAC_MAC_ADDR_MATCH,
132 &adap_emac->MACADDRLO);
133 #else
134 writel(mac_lo, &adap_emac->MACADDRLO);
135 #endif
136
137 writel(0, &adap_emac->MACHASH1);
138 writel(0, &adap_emac->MACHASH2);
139
140 /* Set source MAC address - REQUIRED */
141 writel(mac_hi, &adap_emac->MACSRCADDRHI);
142 writel(mac_lo, &adap_emac->MACSRCADDRLO);
143
144
145 return 0;
146 }
147
148 static void davinci_eth_mdio_enable(void)
149 {
150 u_int32_t clkdiv;
151
152 clkdiv = CONFIG_SYS_EMAC_TI_CLKDIV;
153
154 writel((clkdiv & 0xff) |
155 MDIO_CONTROL_ENABLE |
156 MDIO_CONTROL_FAULT |
157 MDIO_CONTROL_FAULT_ENABLE,
158 &adap_mdio->CONTROL);
159
160 while (readl(&adap_mdio->CONTROL) & MDIO_CONTROL_IDLE)
161 ;
162 }
163
164 /*
165 * Tries to find an active connected PHY. Returns 1 if address if found.
166 * If no active PHY (or more than one PHY) found returns 0.
167 * Sets active_phy_addr variable.
168 */
169 static int davinci_eth_phy_detect(void)
170 {
171 u_int32_t phy_act_state;
172 int i;
173 int j;
174 unsigned int count = 0;
175
176 for (i = 0; i < CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT; i++)
177 active_phy_addr[i] = 0xff;
178
179 udelay(1000);
180 phy_act_state = readl(&adap_mdio->ALIVE);
181
182 if (phy_act_state == 0)
183 return 0; /* No active PHYs */
184
185 debug_emac("davinci_eth_phy_detect(), ALIVE = 0x%08x\n", phy_act_state);
186
187 for (i = 0, j = 0; i < 32; i++)
188 if (phy_act_state & (1 << i)) {
189 count++;
190 if (count <= CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT) {
191 active_phy_addr[j++] = i;
192 } else {
193 printf("%s: to many PHYs detected.\n",
194 __func__);
195 count = 0;
196 break;
197 }
198 }
199
200 num_phy = count;
201
202 return count;
203 }
204
205
206 /* Read a PHY register via MDIO inteface. Returns 1 on success, 0 otherwise */
207 int davinci_eth_phy_read(u_int8_t phy_addr, u_int8_t reg_num, u_int16_t *data)
208 {
209 int tmp;
210
211 while (readl(&adap_mdio->USERACCESS0) & MDIO_USERACCESS0_GO)
212 ;
213
214 writel(MDIO_USERACCESS0_GO |
215 MDIO_USERACCESS0_WRITE_READ |
216 ((reg_num & 0x1f) << 21) |
217 ((phy_addr & 0x1f) << 16),
218 &adap_mdio->USERACCESS0);
219
220 /* Wait for command to complete */
221 while ((tmp = readl(&adap_mdio->USERACCESS0)) & MDIO_USERACCESS0_GO)
222 ;
223
224 if (tmp & MDIO_USERACCESS0_ACK) {
225 *data = tmp & 0xffff;
226 return 1;
227 }
228
229 return 0;
230 }
231
232 /* Write to a PHY register via MDIO inteface. Blocks until operation is complete. */
233 int davinci_eth_phy_write(u_int8_t phy_addr, u_int8_t reg_num, u_int16_t data)
234 {
235
236 while (readl(&adap_mdio->USERACCESS0) & MDIO_USERACCESS0_GO)
237 ;
238
239 writel(MDIO_USERACCESS0_GO |
240 MDIO_USERACCESS0_WRITE_WRITE |
241 ((reg_num & 0x1f) << 21) |
242 ((phy_addr & 0x1f) << 16) |
243 (data & 0xffff),
244 &adap_mdio->USERACCESS0);
245
246 /* Wait for command to complete */
247 while (readl(&adap_mdio->USERACCESS0) & MDIO_USERACCESS0_GO)
248 ;
249
250 return 1;
251 }
252
253 /* PHY functions for a generic PHY */
254 static int gen_init_phy(int phy_addr)
255 {
256 int ret = 1;
257
258 if (gen_get_link_speed(phy_addr)) {
259 /* Try another time */
260 ret = gen_get_link_speed(phy_addr);
261 }
262
263 return(ret);
264 }
265
266 static int gen_is_phy_connected(int phy_addr)
267 {
268 u_int16_t dummy;
269
270 return davinci_eth_phy_read(phy_addr, MII_PHYSID1, &dummy);
271 }
272
273 static int get_active_phy(void)
274 {
275 int i;
276
277 for (i = 0; i < num_phy; i++)
278 if (phy[i].get_link_speed(active_phy_addr[i]))
279 return i;
280
281 return -1; /* Return error if no link */
282 }
283
284 static int gen_get_link_speed(int phy_addr)
285 {
286 u_int16_t tmp;
287
288 if (davinci_eth_phy_read(phy_addr, MII_STATUS_REG, &tmp) &&
289 (tmp & 0x04)) {
290 #if defined(CONFIG_DRIVER_TI_EMAC_USE_RMII) && \
291 defined(CONFIG_MACH_DAVINCI_DA850_EVM)
292 davinci_eth_phy_read(phy_addr, MII_LPA, &tmp);
293
294 /* Speed doesn't matter, there is no setting for it in EMAC. */
295 if (tmp & (LPA_100FULL | LPA_10FULL)) {
296 /* set EMAC for Full Duplex */
297 writel(EMAC_MACCONTROL_MIIEN_ENABLE |
298 EMAC_MACCONTROL_FULLDUPLEX_ENABLE,
299 &adap_emac->MACCONTROL);
300 } else {
301 /*set EMAC for Half Duplex */
302 writel(EMAC_MACCONTROL_MIIEN_ENABLE,
303 &adap_emac->MACCONTROL);
304 }
305
306 if (tmp & (LPA_100FULL | LPA_100HALF))
307 writel(readl(&adap_emac->MACCONTROL) |
308 EMAC_MACCONTROL_RMIISPEED_100,
309 &adap_emac->MACCONTROL);
310 else
311 writel(readl(&adap_emac->MACCONTROL) &
312 ~EMAC_MACCONTROL_RMIISPEED_100,
313 &adap_emac->MACCONTROL);
314 #endif
315 return(1);
316 }
317
318 return(0);
319 }
320
321 static int gen_auto_negotiate(int phy_addr)
322 {
323 u_int16_t tmp;
324 u_int16_t val;
325 unsigned long cntr = 0;
326
327 if (!davinci_eth_phy_read(phy_addr, MII_BMCR, &tmp))
328 return 0;
329
330 val = tmp | BMCR_FULLDPLX | BMCR_ANENABLE |
331 BMCR_SPEED100;
332 davinci_eth_phy_write(phy_addr, MII_BMCR, val);
333
334 if (!davinci_eth_phy_read(phy_addr, MII_ADVERTISE, &val))
335 return 0;
336
337 val |= (ADVERTISE_100FULL | ADVERTISE_100HALF | ADVERTISE_10FULL |
338 ADVERTISE_10HALF);
339 davinci_eth_phy_write(phy_addr, MII_ADVERTISE, val);
340
341 if (!davinci_eth_phy_read(phy_addr, MII_BMCR, &tmp))
342 return(0);
343
344 #ifdef DAVINCI_EMAC_GIG_ENABLE
345 davinci_eth_phy_read(phy_addr, MII_CTRL1000, &val);
346 val |= PHY_1000BTCR_1000FD;
347 val &= ~PHY_1000BTCR_1000HD;
348 davinci_eth_phy_write(phy_addr, MII_CTRL1000, val);
349 davinci_eth_phy_read(phy_addr, MII_CTRL1000, &val);
350 #endif
351
352 /* Restart Auto_negotiation */
353 tmp |= BMCR_ANRESTART;
354 davinci_eth_phy_write(phy_addr, MII_BMCR, tmp);
355
356 /*check AutoNegotiate complete */
357 do {
358 udelay(40000);
359 if (!davinci_eth_phy_read(phy_addr, MII_BMSR, &tmp))
360 return 0;
361
362 if (tmp & BMSR_ANEGCOMPLETE)
363 break;
364
365 cntr++;
366 } while (cntr < 200);
367
368 if (!davinci_eth_phy_read(phy_addr, MII_BMSR, &tmp))
369 return(0);
370
371 if (!(tmp & BMSR_ANEGCOMPLETE))
372 return(0);
373
374 return(gen_get_link_speed(phy_addr));
375 }
376 /* End of generic PHY functions */
377
378
379 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
380 static int davinci_mii_phy_read(struct mii_dev *bus, int addr, int devad,
381 int reg)
382 {
383 unsigned short value = 0;
384 int retval = davinci_eth_phy_read(addr, reg, &value);
385
386 return retval ? value : -EIO;
387 }
388
389 static int davinci_mii_phy_write(struct mii_dev *bus, int addr, int devad,
390 int reg, u16 value)
391 {
392 return davinci_eth_phy_write(addr, reg, value) ? 0 : 1;
393 }
394 #endif
395
396 static void __attribute__((unused)) davinci_eth_gigabit_enable(int phy_addr)
397 {
398 u_int16_t data;
399
400 if (davinci_eth_phy_read(phy_addr, 0, &data)) {
401 if (data & (1 << 6)) { /* speed selection MSB */
402 /*
403 * Check if link detected is giga-bit
404 * If Gigabit mode detected, enable gigbit in MAC
405 */
406 writel(readl(&adap_emac->MACCONTROL) |
407 EMAC_MACCONTROL_GIGFORCE |
408 EMAC_MACCONTROL_GIGABIT_ENABLE,
409 &adap_emac->MACCONTROL);
410 }
411 }
412 }
413
414 /* Eth device open */
415 static int davinci_eth_open(struct eth_device *dev, bd_t *bis)
416 {
417 dv_reg_p addr;
418 u_int32_t clkdiv, cnt, mac_control;
419 uint16_t __maybe_unused lpa_val;
420 volatile emac_desc *rx_desc;
421 int index;
422
423 debug_emac("+ emac_open\n");
424
425 /* Reset EMAC module and disable interrupts in wrapper */
426 writel(1, &adap_emac->SOFTRESET);
427 while (readl(&adap_emac->SOFTRESET) != 0)
428 ;
429 #if defined(DAVINCI_EMAC_VERSION2)
430 writel(1, &adap_ewrap->softrst);
431 while (readl(&adap_ewrap->softrst) != 0)
432 ;
433 #else
434 writel(0, &adap_ewrap->EWCTL);
435 for (cnt = 0; cnt < 5; cnt++) {
436 clkdiv = readl(&adap_ewrap->EWCTL);
437 }
438 #endif
439
440 #if defined(CONFIG_DRIVER_TI_EMAC_USE_RMII) && \
441 defined(CONFIG_MACH_DAVINCI_DA850_EVM)
442 adap_ewrap->c0rxen = adap_ewrap->c1rxen = adap_ewrap->c2rxen = 0;
443 adap_ewrap->c0txen = adap_ewrap->c1txen = adap_ewrap->c2txen = 0;
444 adap_ewrap->c0miscen = adap_ewrap->c1miscen = adap_ewrap->c2miscen = 0;
445 #endif
446 rx_desc = emac_rx_desc;
447
448 writel(1, &adap_emac->TXCONTROL);
449 writel(1, &adap_emac->RXCONTROL);
450
451 davinci_eth_set_mac_addr(dev);
452
453 /* Set DMA 8 TX / 8 RX Head pointers to 0 */
454 addr = &adap_emac->TX0HDP;
455 for (cnt = 0; cnt < 8; cnt++)
456 writel(0, addr++);
457
458 addr = &adap_emac->RX0HDP;
459 for (cnt = 0; cnt < 8; cnt++)
460 writel(0, addr++);
461
462 /* Clear Statistics (do this before setting MacControl register) */
463 addr = &adap_emac->RXGOODFRAMES;
464 for(cnt = 0; cnt < EMAC_NUM_STATS; cnt++)
465 writel(0, addr++);
466
467 /* No multicast addressing */
468 writel(0, &adap_emac->MACHASH1);
469 writel(0, &adap_emac->MACHASH2);
470
471 /* Create RX queue and set receive process in place */
472 emac_rx_active_head = emac_rx_desc;
473 for (cnt = 0; cnt < EMAC_MAX_RX_BUFFERS; cnt++) {
474 rx_desc->next = BD_TO_HW((u_int32_t)(rx_desc + 1));
475 rx_desc->buffer = &emac_rx_buffers[cnt * EMAC_RXBUF_SIZE];
476 rx_desc->buff_off_len = EMAC_MAX_ETHERNET_PKT_SIZE;
477 rx_desc->pkt_flag_len = EMAC_CPPI_OWNERSHIP_BIT;
478 rx_desc++;
479 }
480
481 /* Finalize the rx desc list */
482 rx_desc--;
483 rx_desc->next = 0;
484 emac_rx_active_tail = rx_desc;
485 emac_rx_queue_active = 1;
486
487 /* Enable TX/RX */
488 writel(EMAC_MAX_ETHERNET_PKT_SIZE, &adap_emac->RXMAXLEN);
489 writel(0, &adap_emac->RXBUFFEROFFSET);
490
491 /*
492 * No fancy configs - Use this for promiscous debug
493 * - EMAC_RXMBPENABLE_RXCAFEN_ENABLE
494 */
495 writel(EMAC_RXMBPENABLE_RXBROADEN, &adap_emac->RXMBPENABLE);
496
497 /* Enable ch 0 only */
498 writel(1, &adap_emac->RXUNICASTSET);
499
500 /* Init MDIO & get link state */
501 clkdiv = CONFIG_SYS_EMAC_TI_CLKDIV;
502 writel((clkdiv & 0xff) | MDIO_CONTROL_ENABLE | MDIO_CONTROL_FAULT,
503 &adap_mdio->CONTROL);
504
505 /* We need to wait for MDIO to start */
506 udelay(1000);
507
508 index = get_active_phy();
509 if (index == -1)
510 return(0);
511
512 /* Enable MII interface */
513 mac_control = EMAC_MACCONTROL_MIIEN_ENABLE;
514 #ifdef DAVINCI_EMAC_GIG_ENABLE
515 davinci_eth_phy_read(active_phy_addr[index], MII_STAT1000, &lpa_val);
516 if (lpa_val & PHY_1000BTSR_1000FD) {
517 debug_emac("eth_open : gigabit negotiated\n");
518 mac_control |= EMAC_MACCONTROL_FULLDUPLEX_ENABLE;
519 mac_control |= EMAC_MACCONTROL_GIGABIT_ENABLE;
520 }
521 #endif
522
523 davinci_eth_phy_read(active_phy_addr[index], MII_LPA, &lpa_val);
524 if (lpa_val & (LPA_100FULL | LPA_10FULL))
525 /* set EMAC for Full Duplex */
526 mac_control |= EMAC_MACCONTROL_FULLDUPLEX_ENABLE;
527 #if defined(CONFIG_SOC_DA8XX) || \
528 (defined(CONFIG_OMAP34XX) && defined(CONFIG_DRIVER_TI_EMAC_USE_RMII))
529 mac_control |= EMAC_MACCONTROL_RMIISPEED_100;
530 #endif
531 writel(mac_control, &adap_emac->MACCONTROL);
532 /* Start receive process */
533 writel(BD_TO_HW((u_int32_t)emac_rx_desc), &adap_emac->RX0HDP);
534
535 debug_emac("- emac_open\n");
536
537 return(1);
538 }
539
540 /* EMAC Channel Teardown */
541 static void davinci_eth_ch_teardown(int ch)
542 {
543 dv_reg dly = 0xff;
544 dv_reg cnt;
545
546 debug_emac("+ emac_ch_teardown\n");
547
548 if (ch == EMAC_CH_TX) {
549 /* Init TX channel teardown */
550 writel(0, &adap_emac->TXTEARDOWN);
551 do {
552 /*
553 * Wait here for Tx teardown completion interrupt to
554 * occur. Note: A task delay can be called here to pend
555 * rather than occupying CPU cycles - anyway it has
556 * been found that teardown takes very few cpu cycles
557 * and does not affect functionality
558 */
559 dly--;
560 udelay(1);
561 if (dly == 0)
562 break;
563 cnt = readl(&adap_emac->TX0CP);
564 } while (cnt != 0xfffffffc);
565 writel(cnt, &adap_emac->TX0CP);
566 writel(0, &adap_emac->TX0HDP);
567 } else {
568 /* Init RX channel teardown */
569 writel(0, &adap_emac->RXTEARDOWN);
570 do {
571 /*
572 * Wait here for Rx teardown completion interrupt to
573 * occur. Note: A task delay can be called here to pend
574 * rather than occupying CPU cycles - anyway it has
575 * been found that teardown takes very few cpu cycles
576 * and does not affect functionality
577 */
578 dly--;
579 udelay(1);
580 if (dly == 0)
581 break;
582 cnt = readl(&adap_emac->RX0CP);
583 } while (cnt != 0xfffffffc);
584 writel(cnt, &adap_emac->RX0CP);
585 writel(0, &adap_emac->RX0HDP);
586 }
587
588 debug_emac("- emac_ch_teardown\n");
589 }
590
591 /* Eth device close */
592 static void davinci_eth_close(struct eth_device *dev)
593 {
594 debug_emac("+ emac_close\n");
595
596 davinci_eth_ch_teardown(EMAC_CH_TX); /* TX Channel teardown */
597 if (readl(&adap_emac->RXCONTROL) & 1)
598 davinci_eth_ch_teardown(EMAC_CH_RX); /* RX Channel teardown */
599
600 /* Reset EMAC module and disable interrupts in wrapper */
601 writel(1, &adap_emac->SOFTRESET);
602 #if defined(DAVINCI_EMAC_VERSION2)
603 writel(1, &adap_ewrap->softrst);
604 #else
605 writel(0, &adap_ewrap->EWCTL);
606 #endif
607
608 #if defined(CONFIG_DRIVER_TI_EMAC_USE_RMII) && \
609 defined(CONFIG_MACH_DAVINCI_DA850_EVM)
610 adap_ewrap->c0rxen = adap_ewrap->c1rxen = adap_ewrap->c2rxen = 0;
611 adap_ewrap->c0txen = adap_ewrap->c1txen = adap_ewrap->c2txen = 0;
612 adap_ewrap->c0miscen = adap_ewrap->c1miscen = adap_ewrap->c2miscen = 0;
613 #endif
614 debug_emac("- emac_close\n");
615 }
616
617 static int tx_send_loop = 0;
618
619 /*
620 * This function sends a single packet on the network and returns
621 * positive number (number of bytes transmitted) or negative for error
622 */
623 static int davinci_eth_send_packet (struct eth_device *dev,
624 void *packet, int length)
625 {
626 int ret_status = -1;
627 int index;
628 tx_send_loop = 0;
629
630 index = get_active_phy();
631 if (index == -1) {
632 printf(" WARN: emac_send_packet: No link\n");
633 return (ret_status);
634 }
635
636 /* Check packet size and if < EMAC_MIN_ETHERNET_PKT_SIZE, pad it up */
637 if (length < EMAC_MIN_ETHERNET_PKT_SIZE) {
638 length = EMAC_MIN_ETHERNET_PKT_SIZE;
639 }
640
641 /* Populate the TX descriptor */
642 emac_tx_desc->next = 0;
643 emac_tx_desc->buffer = (u_int8_t *) packet;
644 emac_tx_desc->buff_off_len = (length & 0xffff);
645 emac_tx_desc->pkt_flag_len = ((length & 0xffff) |
646 EMAC_CPPI_SOP_BIT |
647 EMAC_CPPI_OWNERSHIP_BIT |
648 EMAC_CPPI_EOP_BIT);
649
650 flush_dcache_range((unsigned long)packet,
651 (unsigned long)packet + ALIGN(length, PKTALIGN));
652
653 /* Send the packet */
654 writel(BD_TO_HW((unsigned long)emac_tx_desc), &adap_emac->TX0HDP);
655
656 /* Wait for packet to complete or link down */
657 while (1) {
658 if (!phy[index].get_link_speed(active_phy_addr[index])) {
659 davinci_eth_ch_teardown (EMAC_CH_TX);
660 return (ret_status);
661 }
662
663 if (readl(&adap_emac->TXINTSTATRAW) & 0x01) {
664 ret_status = length;
665 break;
666 }
667 tx_send_loop++;
668 }
669
670 return (ret_status);
671 }
672
673 /*
674 * This function handles receipt of a packet from the network
675 */
676 static int davinci_eth_rcv_packet (struct eth_device *dev)
677 {
678 volatile emac_desc *rx_curr_desc;
679 volatile emac_desc *curr_desc;
680 volatile emac_desc *tail_desc;
681 int status, ret = -1;
682
683 rx_curr_desc = emac_rx_active_head;
684 if (!rx_curr_desc)
685 return 0;
686 status = rx_curr_desc->pkt_flag_len;
687 if ((status & EMAC_CPPI_OWNERSHIP_BIT) == 0) {
688 if (status & EMAC_CPPI_RX_ERROR_FRAME) {
689 /* Error in packet - discard it and requeue desc */
690 printf ("WARN: emac_rcv_pkt: Error in packet\n");
691 } else {
692 unsigned long tmp = (unsigned long)rx_curr_desc->buffer;
693 unsigned short len =
694 rx_curr_desc->buff_off_len & 0xffff;
695
696 invalidate_dcache_range(tmp, tmp + ALIGN(len, PKTALIGN));
697 net_process_received_packet(rx_curr_desc->buffer, len);
698 ret = len;
699 }
700
701 /* Ack received packet descriptor */
702 writel(BD_TO_HW((ulong)rx_curr_desc), &adap_emac->RX0CP);
703 curr_desc = rx_curr_desc;
704 emac_rx_active_head =
705 (volatile emac_desc *) (HW_TO_BD(rx_curr_desc->next));
706
707 if (status & EMAC_CPPI_EOQ_BIT) {
708 if (emac_rx_active_head) {
709 writel(BD_TO_HW((ulong)emac_rx_active_head),
710 &adap_emac->RX0HDP);
711 } else {
712 emac_rx_queue_active = 0;
713 printf ("INFO:emac_rcv_packet: RX Queue not active\n");
714 }
715 }
716
717 /* Recycle RX descriptor */
718 rx_curr_desc->buff_off_len = EMAC_MAX_ETHERNET_PKT_SIZE;
719 rx_curr_desc->pkt_flag_len = EMAC_CPPI_OWNERSHIP_BIT;
720 rx_curr_desc->next = 0;
721
722 if (emac_rx_active_head == 0) {
723 printf ("INFO: emac_rcv_pkt: active queue head = 0\n");
724 emac_rx_active_head = curr_desc;
725 emac_rx_active_tail = curr_desc;
726 if (emac_rx_queue_active != 0) {
727 writel(BD_TO_HW((ulong)emac_rx_active_head),
728 &adap_emac->RX0HDP);
729 printf ("INFO: emac_rcv_pkt: active queue head = 0, HDP fired\n");
730 emac_rx_queue_active = 1;
731 }
732 } else {
733 tail_desc = emac_rx_active_tail;
734 emac_rx_active_tail = curr_desc;
735 tail_desc->next = BD_TO_HW((ulong) curr_desc);
736 status = tail_desc->pkt_flag_len;
737 if (status & EMAC_CPPI_EOQ_BIT) {
738 writel(BD_TO_HW((ulong)curr_desc),
739 &adap_emac->RX0HDP);
740 status &= ~EMAC_CPPI_EOQ_BIT;
741 tail_desc->pkt_flag_len = status;
742 }
743 }
744 return (ret);
745 }
746 return (0);
747 }
748
749 /*
750 * This function initializes the emac hardware. It does NOT initialize
751 * EMAC modules power or pin multiplexors, that is done by board_init()
752 * much earlier in bootup process. Returns 1 on success, 0 otherwise.
753 */
754 int davinci_emac_initialize(void)
755 {
756 u_int32_t phy_id;
757 u_int16_t tmp;
758 int i;
759 int ret;
760 struct eth_device *dev;
761
762 dev = malloc(sizeof *dev);
763
764 if (dev == NULL)
765 return -1;
766
767 memset(dev, 0, sizeof *dev);
768 strcpy(dev->name, "DaVinci-EMAC");
769
770 dev->iobase = 0;
771 dev->init = davinci_eth_open;
772 dev->halt = davinci_eth_close;
773 dev->send = davinci_eth_send_packet;
774 dev->recv = davinci_eth_rcv_packet;
775 dev->write_hwaddr = davinci_eth_set_mac_addr;
776
777 eth_register(dev);
778
779 davinci_eth_mdio_enable();
780
781 /* let the EMAC detect the PHYs */
782 udelay(5000);
783
784 for (i = 0; i < 256; i++) {
785 if (readl(&adap_mdio->ALIVE))
786 break;
787 udelay(1000);
788 }
789
790 if (i >= 256) {
791 printf("No ETH PHY detected!!!\n");
792 return(0);
793 }
794
795 /* Find if PHY(s) is/are connected */
796 ret = davinci_eth_phy_detect();
797 if (!ret)
798 return(0);
799 else
800 debug_emac(" %d ETH PHY detected\n", ret);
801
802 /* Get PHY ID and initialize phy_ops for a detected PHY */
803 for (i = 0; i < num_phy; i++) {
804 if (!davinci_eth_phy_read(active_phy_addr[i], MII_PHYSID1,
805 &tmp)) {
806 active_phy_addr[i] = 0xff;
807 continue;
808 }
809
810 phy_id = (tmp << 16) & 0xffff0000;
811
812 if (!davinci_eth_phy_read(active_phy_addr[i], MII_PHYSID2,
813 &tmp)) {
814 active_phy_addr[i] = 0xff;
815 continue;
816 }
817
818 phy_id |= tmp & 0x0000ffff;
819
820 switch (phy_id) {
821 #ifdef PHY_KSZ8873
822 case PHY_KSZ8873:
823 sprintf(phy[i].name, "KSZ8873 @ 0x%02x",
824 active_phy_addr[i]);
825 phy[i].init = ksz8873_init_phy;
826 phy[i].is_phy_connected = ksz8873_is_phy_connected;
827 phy[i].get_link_speed = ksz8873_get_link_speed;
828 phy[i].auto_negotiate = ksz8873_auto_negotiate;
829 break;
830 #endif
831 #ifdef PHY_LXT972
832 case PHY_LXT972:
833 sprintf(phy[i].name, "LXT972 @ 0x%02x",
834 active_phy_addr[i]);
835 phy[i].init = lxt972_init_phy;
836 phy[i].is_phy_connected = lxt972_is_phy_connected;
837 phy[i].get_link_speed = lxt972_get_link_speed;
838 phy[i].auto_negotiate = lxt972_auto_negotiate;
839 break;
840 #endif
841 #ifdef PHY_DP83848
842 case PHY_DP83848:
843 sprintf(phy[i].name, "DP83848 @ 0x%02x",
844 active_phy_addr[i]);
845 phy[i].init = dp83848_init_phy;
846 phy[i].is_phy_connected = dp83848_is_phy_connected;
847 phy[i].get_link_speed = dp83848_get_link_speed;
848 phy[i].auto_negotiate = dp83848_auto_negotiate;
849 break;
850 #endif
851 #ifdef PHY_ET1011C
852 case PHY_ET1011C:
853 sprintf(phy[i].name, "ET1011C @ 0x%02x",
854 active_phy_addr[i]);
855 phy[i].init = gen_init_phy;
856 phy[i].is_phy_connected = gen_is_phy_connected;
857 phy[i].get_link_speed = et1011c_get_link_speed;
858 phy[i].auto_negotiate = gen_auto_negotiate;
859 break;
860 #endif
861 default:
862 sprintf(phy[i].name, "GENERIC @ 0x%02x",
863 active_phy_addr[i]);
864 phy[i].init = gen_init_phy;
865 phy[i].is_phy_connected = gen_is_phy_connected;
866 phy[i].get_link_speed = gen_get_link_speed;
867 phy[i].auto_negotiate = gen_auto_negotiate;
868 }
869
870 debug("Ethernet PHY: %s\n", phy[i].name);
871
872 int retval;
873 struct mii_dev *mdiodev = mdio_alloc();
874 if (!mdiodev)
875 return -ENOMEM;
876 strncpy(mdiodev->name, phy[i].name, MDIO_NAME_LEN);
877 mdiodev->read = davinci_mii_phy_read;
878 mdiodev->write = davinci_mii_phy_write;
879
880 retval = mdio_register(mdiodev);
881 if (retval < 0)
882 return retval;
883 #ifdef DAVINCI_EMAC_GIG_ENABLE
884 #define PHY_CONF_REG 22
885 /* Enable PHY to clock out TX_CLK */
886 davinci_eth_phy_read(active_phy_addr[i], PHY_CONF_REG, &tmp);
887 tmp |= PHY_CONF_TXCLKEN;
888 davinci_eth_phy_write(active_phy_addr[i], PHY_CONF_REG, tmp);
889 davinci_eth_phy_read(active_phy_addr[i], PHY_CONF_REG, &tmp);
890 #endif
891 }
892
893 #if defined(CONFIG_TI816X) || (defined(CONFIG_DRIVER_TI_EMAC_USE_RMII) && \
894 defined(CONFIG_MACH_DAVINCI_DA850_EVM) && \
895 !defined(CONFIG_DRIVER_TI_EMAC_RMII_NO_NEGOTIATE))
896 for (i = 0; i < num_phy; i++) {
897 if (phy[i].is_phy_connected(i))
898 phy[i].auto_negotiate(i);
899 }
900 #endif
901 return(1);
902 }
"Das U-Boot" Source Tree