1 /* mbed Microcontroller Library
2 * Copyright (c) 2006-2013 ARM Limited
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #include "ethernet_api.h"
19 #include "mbed_interface.h"
20 #include "toolchain.h"
21 #include "mbed_error.h"
22 #include "ether_iodefine.h"
23 #include "ethernetext_api.h"
26 #define NUM_OF_TX_DESCRIPTOR (16)
27 #define NUM_OF_RX_DESCRIPTOR (16)
28 #define SIZE_OF_BUFFER (1600) /* Must be an integral multiple of 32 */
29 #define MAX_SEND_SIZE (1514)
30 /* Ethernet Descriptor Value Define */
31 #define TD0_TFP_TOP_BOTTOM (0x30000000)
32 #define TD0_TACT (0x80000000)
33 #define TD0_TDLE (0x40000000)
34 #define RD0_RACT (0x80000000)
35 #define RD0_RDLE (0x40000000)
36 #define RD0_RFE (0x08000000)
37 #define RD0_RCSE (0x04000000)
38 #define RD0_RFS (0x03FF0000)
39 #define RD0_RCS (0x0000FFFF)
40 #define RD0_RFS_RFOF (0x02000000)
41 #define RD0_RFS_RUAF (0x00400000)
42 #define RD0_RFS_RRF (0x00100000)
43 #define RD0_RFS_RTLF (0x00080000)
44 #define RD0_RFS_RTSF (0x00040000)
45 #define RD0_RFS_PRE (0x00020000)
46 #define RD0_RFS_CERF (0x00010000)
47 #define RD0_RFS_ERROR (RD0_RFS_RFOF | RD0_RFS_RUAF | RD0_RFS_RRF | RD0_RFS_RTLF | \
48 RD0_RFS_RTSF | RD0_RFS_PRE | RD0_RFS_CERF)
49 #define RD1_RDL_MSK (0x0000FFFF)
51 #define BASIC_MODE_CONTROL_REG (0)
52 #define BASIC_MODE_STATUS_REG (1)
53 #define PHY_IDENTIFIER1_REG (2)
54 #define PHY_IDENTIFIER2_REG (3)
55 #define PHY_SP_CTL_STS_REG (31)
56 /* MII management interface access */
57 #define PHY_ADDR (0) /* Confirm the pin connection of the PHY-LSI */
61 #define MDC_WAIT (6) /* 400ns/4 */
62 #define BASIC_STS_MSK_LINK (0x0004) /* Link Status */
63 #define BASIC_STS_MSK_AUTO_CMP (0x0010) /* Auto-Negotiate Complete */
64 #define M_PHY_ID (0xFFFFFFF0)
65 #define PHY_ID_LAN8710A (0x0007C0F0)
67 #define PIR0_MDI (0x00000008)
68 #define PIR0_MDO (0x00000004)
69 #define PIR0_MMD (0x00000002)
70 #define PIR0_MDC (0x00000001)
71 #define PIR0_MDC_HIGH (0x00000001)
72 #define PIR0_MDC_LOW (0x00000000)
74 #define EDRRR0_RR (0x00000001)
76 #define EDTRR0_TR (0x00000003)
78 #define LOOP_100us (6700) /* Loop counter for software wait 6666=100us/((1/400MHz)*6cyc) */
80 #define EDMAC_EESIPR_INI_RECV (0x0205001F) /* 0x02000000 : Detect reception suspended */
81 /* 0x00040000 : Detect frame reception */
82 /* 0x00010000 : Receive FIFO overflow */
83 /* 0x00000010 : Residual bit frame reception */
84 /* 0x00000008 : Long frame reception */
85 /* 0x00000004 : Short frame reception */
86 /* 0x00000002 : PHY-LSI reception error */
87 /* 0x00000001 : Receive frame CRC error */
88 #define EDMAC_EESIPR_INI_EtherC (0x00400000) /* 0x00400000 : E-MAC status register */
91 typedef struct tag_edmac_send_desc {
98 /* Receive descriptor */
99 typedef struct tag_edmac_recv_desc {
107 /* The whole transmit/receive descriptors (must be allocated in 16-byte boundaries) */
108 /* Transmit/receive buffers (must be allocated in 16-byte boundaries) */
109 static uint8_t ehernet_nc_memory[(sizeof(edmac_send_desc_t) * NUM_OF_TX_DESCRIPTOR) +
110 (sizeof(edmac_recv_desc_t) * NUM_OF_RX_DESCRIPTOR) +
111 (NUM_OF_TX_DESCRIPTOR * SIZE_OF_BUFFER) +
112 (NUM_OF_RX_DESCRIPTOR * SIZE_OF_BUFFER)]
113 __attribute((section("NC_BSS"),aligned(16))); //16 bytes aligned!
114 static int32_t rx_read_offset; /* read offset */
115 static int32_t tx_wite_offset; /* write offset */
116 static uint32_t send_top_index;
117 static uint32_t recv_top_index;
118 static int32_t Interrupt_priority;
119 static edmac_send_desc_t *p_eth_desc_dsend = NULL;
120 static edmac_recv_desc_t *p_eth_desc_drecv = NULL;
121 static edmac_recv_desc_t *p_recv_end_desc = NULL;
122 static ethernetext_cb_fnc *p_recv_cb_fnc = NULL;
123 static char mac_addr[6] = {0x00, 0x02, 0xF7, 0xF0, 0x00, 0x00}; /* MAC Address */
124 static uint32_t phy_id = 0;
125 static uint32_t start_stop = 1; /* 0:stop 1:start */
128 static void lan_reg_reset(void);
129 static void lan_desc_create(void);
130 static void lan_reg_set(int32_t link);
131 static uint16_t phy_reg_read(uint16_t reg_addr);
132 static void phy_reg_write(uint16_t reg_addr, uint16_t data);
133 static void mii_preamble(void);
134 static void mii_cmd(uint16_t reg_addr, uint32_t option);
135 static void mii_reg_read(uint16_t *data);
136 static void mii_reg_write(uint16_t data);
137 static void mii_z(void);
138 static void mii_write_1(void);
139 static void mii_write_0(void);
140 static void set_ether_pir(uint32_t set_data);
141 static void wait_100us(int32_t wait_cnt);
144 int ethernetext_init(ethernet_cfg_t *p_ethcfg) {
148 CPGSTBCR7 &= ~(CPG_STBCR7_BIT_MSTP74); /* enable ETHER clock */
150 /* P4_2(PHY Reset) */
151 GPIOP4 &= ~0x0004; /* Outputs low level */
152 GPIOPMC4 &= ~0x0004; /* Port mode */
153 GPIOPM4 &= ~0x0004; /* Output mode */
155 /* GPIO P1 P1_14(ET_COL) */
157 GPIOPFCAE1 &= ~0x4000;
161 /* P3_0(ET_TXCLK), P3_3(ET_MDIO), P3_4(ET_RXCLK), P3_5(ET_RXER), P3_6(ET_RXDV) */
163 GPIOPFCAE3 &= ~0x0079;
164 GPIOPFCE3 &= ~0x0079;
170 GPIOPFCAE5 &= ~0x0200;
171 GPIOPFCE5 &= ~0x0200;
175 /* P10_1(ET_TXER), P10_2(ET_TXEN), P10_3(ET_CRS), P10_4(ET_TXD0), P10_5(ET_TXD1) */
176 /* P10_6(ET_TXD2), P10_7(ET_TXD3), P10_8(ET_RXD0), P10_9(ET_RXD1), P10_10(ET_RXD2), P10_11(ET_RXD3) */
178 GPIOPFCAE10 &= ~0x0FFE;
179 GPIOPFCE10 |= 0x0FFE;
181 GPIOPIPC10 |= 0x0FFE;
183 /* Resets the E-MAC,E-DMAC */
187 GPIOP4 &= ~0x0004; /* P4_2 Outputs low level */
188 wait_100us(250); /* 25msec */
189 GPIOP4 |= 0x0004; /* P4_2 Outputs high level */
190 wait_100us(100); /* 10msec */
192 /* Resets the PHY-LSI */
193 phy_reg_write(BASIC_MODE_CONTROL_REG, 0x8000);
194 for (i = 10000; i > 0; i--) {
195 val = phy_reg_read(BASIC_MODE_CONTROL_REG);
196 if (((uint32_t)val & 0x8000uL) == 0) {
197 break; /* Reset complete */
201 phy_id = ((uint32_t)phy_reg_read(PHY_IDENTIFIER1_REG) << 16)
202 | (uint32_t)phy_reg_read(PHY_IDENTIFIER2_REG);
204 Interrupt_priority = p_ethcfg->int_priority;
205 p_recv_cb_fnc = p_ethcfg->recv_cb;
208 if (p_ethcfg->ether_mac != NULL) {
209 (void)memcpy(mac_addr, p_ethcfg->ether_mac, sizeof(mac_addr));
211 ethernet_address(mac_addr); /* Get MAC Address */
217 void ethernetext_start_stop(int32_t mode) {
220 ETHEREDTRR0 |= EDTRR0_TR;
221 ETHEREDRRR0 |= EDRRR0_RR;
225 ETHEREDTRR0 &= ~EDTRR0_TR;
226 ETHEREDRRR0 &= ~EDRRR0_RR;
231 int ethernetext_chk_link_mode(void) {
235 if ((phy_id & M_PHY_ID) == PHY_ID_LAN8710A) {
236 data = phy_reg_read(PHY_SP_CTL_STS_REG);
237 switch (((uint32_t)data >> 2) & 0x00000007) {
261 void ethernetext_set_link_mode(int32_t link) {
262 lan_reg_reset(); /* Resets the E-MAC,E-DMAC */
263 lan_desc_create(); /* Initialize of buffer memory */
264 lan_reg_set(link); /* E-DMAC, E-MAC initialization */
267 int ethernet_init() {
268 ethernet_cfg_t ethcfg;
270 ethcfg.int_priority = 5;
271 ethcfg.recv_cb = NULL;
272 ethcfg.ether_mac = NULL;
273 ethernetext_init(ðcfg);
274 ethernet_set_link(-1, 0); /* Auto-Negotiation */
279 void ethernet_free() {
280 ETHERARSTR |= 0x00000001; /* ETHER software reset */
281 CPGSTBCR7 |= CPG_STBCR7_BIT_MSTP74; /* disable ETHER clock */
284 int ethernet_write(const char *data, int slen) {
285 edmac_send_desc_t *p_send_desc;
288 if ((p_eth_desc_dsend == NULL) || (data == NULL) || (slen < 0)
289 || (tx_wite_offset < 0) || (tx_wite_offset >= MAX_SEND_SIZE)) {
292 p_send_desc = &p_eth_desc_dsend[send_top_index]; /* Current descriptor */
293 if ((p_send_desc->td0 & TD0_TACT) != 0) {
296 copy_size = MAX_SEND_SIZE - tx_wite_offset;
297 if (copy_size > slen) {
300 (void)memcpy(&p_send_desc->td2[tx_wite_offset], data, copy_size);
301 tx_wite_offset += copy_size;
308 int ethernet_send() {
309 edmac_send_desc_t *p_send_desc;
312 if ((p_eth_desc_dsend == NULL) || (tx_wite_offset <= 0)) {
315 /* Transfer 1 frame */
316 p_send_desc = &p_eth_desc_dsend[send_top_index]; /* Current descriptor */
318 /* Sets the frame length */
319 p_send_desc->td1 = ((uint32_t)tx_wite_offset << 16);
322 /* Sets the transmit descriptor to transmit again */
323 p_send_desc->td0 &= (TD0_TACT | TD0_TDLE | TD0_TFP_TOP_BOTTOM);
324 p_send_desc->td0 |= TD0_TACT;
325 if ((start_stop == 1) && ((ETHEREDTRR0 & EDTRR0_TR) != EDTRR0_TR)) {
326 ETHEREDTRR0 |= EDTRR0_TR;
329 /* Update the current descriptor */
331 if (send_top_index >= NUM_OF_TX_DESCRIPTOR) {
340 int ethernet_receive() {
341 edmac_recv_desc_t *p_recv_desc;
342 int32_t receive_size = 0;
344 if (p_eth_desc_drecv != NULL) {
345 if (p_recv_end_desc != NULL) {
346 /* Sets the receive descriptor to receive again */
347 p_recv_end_desc->rd0 &= (RD0_RACT | RD0_RDLE);
348 p_recv_end_desc->rd0 |= RD0_RACT;
349 if ((start_stop == 1) && ((ETHEREDRRR0 & EDRRR0_RR) == 0)) {
350 ETHEREDRRR0 |= EDRRR0_RR;
352 p_recv_end_desc = NULL;
355 p_recv_desc = &p_eth_desc_drecv[recv_top_index]; /* Current descriptor */
356 if ((p_recv_desc->rd0 & RD0_RACT) == 0) {
357 /* Receives 1 frame */
358 if (((p_recv_desc->rd0 & RD0_RFE) != 0) && ((p_recv_desc->rd0 & RD0_RFS_ERROR) != 0)) {
359 /* Receive frame error */
360 /* Sets the receive descriptor to receive again */
361 p_recv_desc->rd0 &= (RD0_RACT | RD0_RDLE);
362 p_recv_desc->rd0 |= RD0_RACT;
363 if ((start_stop == 1) && ((ETHEREDRRR0 & EDRRR0_RR) == 0)) {
364 ETHEREDRRR0 |= EDRRR0_RR;
367 /* Copies the received frame */
369 p_recv_end_desc = p_recv_desc;
370 receive_size = (p_recv_desc->rd1 & RD1_RDL_MSK); /* number of bytes received */
373 /* Update the current descriptor */
375 if (recv_top_index >= NUM_OF_TX_DESCRIPTOR) {
384 int ethernet_read(char *data, int dlen) {
385 edmac_recv_desc_t *p_recv_desc = p_recv_end_desc; /* Read top descriptor */
388 if ((data == NULL) || (dlen < 0) || (p_recv_desc == NULL)) {
391 copy_size = (p_recv_desc->rd1 & RD1_RDL_MSK) - rx_read_offset;
392 if (copy_size > dlen) {
395 (void)memcpy(data, &p_recv_desc->rd2[rx_read_offset], (size_t)copy_size);
396 rx_read_offset += copy_size;
402 void ethernet_address(char *mac) {
404 mbed_mac_address(mac); /* Get MAC Address */
408 int ethernet_link(void) {
412 data = phy_reg_read(BASIC_MODE_STATUS_REG);
413 if (((uint32_t)data & BASIC_STS_MSK_LINK) != 0) {
422 void ethernet_set_link(int speed, int duplex) {
427 if ((speed < 0) || (speed > 1)) {
428 data = 0x1000; /* Auto-Negotiation Enable */
429 phy_reg_write(BASIC_MODE_CONTROL_REG, data);
430 data = phy_reg_read(BASIC_MODE_STATUS_REG);
431 for (i = 0; i < 1000; i++) {
432 if (((uint32_t)data & BASIC_STS_MSK_AUTO_CMP) != 0) {
438 data = (uint16_t)(((uint32_t)speed << 13) | ((uint32_t)duplex << 8));
439 phy_reg_write(BASIC_MODE_CONTROL_REG, data);
443 link = ethernetext_chk_link_mode();
444 ethernetext_set_link_mode(link);
447 void INT_Ether(void) {
449 uint32_t stat_etherc;
451 /* Clear the interrupt request flag */
452 stat_edmac = (ETHEREESR0 & ETHEREESIPR0); /* Targets are restricted to allowed interrupts */
453 ETHEREESR0 = stat_edmac;
454 /* Reception-related */
455 if (stat_edmac & EDMAC_EESIPR_INI_RECV) {
456 if (p_recv_cb_fnc != NULL) {
461 if (stat_edmac & EDMAC_EESIPR_INI_EtherC) {
462 /* Clear the interrupt request flag */
463 stat_etherc = (ETHERECSR0 & ETHERECSIPR0); /* Targets are restricted to allowed interrupts */
464 ETHERECSR0 = stat_etherc;
468 static void lan_reg_reset(void) {
469 volatile int32_t j = 400; /* Wait for B dia 256 cycles ((I dia/B dia)*256)/6cyc = 8*256/6 = 342 */
471 ETHERARSTR |= 0x00000001; /* ETHER software reset */
476 ETHEREDSR0 |= 0x00000003; /* E-DMAC software reset */
477 ETHEREDMR0 |= 0x00000003; /* Set SWRR and SWRT simultaneously */
479 /* Check clear software reset */
480 while ((ETHEREDMR0 & 0x00000003) != 0) {
485 static void lan_desc_create(void) {
487 uint8_t *p_memory_top;
489 (void)memset((void *)ehernet_nc_memory, 0, sizeof(ehernet_nc_memory));
490 p_memory_top = ehernet_nc_memory;
492 /* Descriptor area configuration */
493 p_eth_desc_dsend = (edmac_send_desc_t *)p_memory_top;
494 p_memory_top += (sizeof(edmac_send_desc_t) * NUM_OF_TX_DESCRIPTOR);
495 p_eth_desc_drecv = (edmac_recv_desc_t *)p_memory_top;
496 p_memory_top += (sizeof(edmac_recv_desc_t) * NUM_OF_RX_DESCRIPTOR);
498 /* Transmit descriptor */
499 for (i = 0; i < NUM_OF_TX_DESCRIPTOR; i++) {
500 p_eth_desc_dsend[i].td2 = p_memory_top; /* TD2 TBA */
501 p_memory_top += SIZE_OF_BUFFER;
502 p_eth_desc_dsend[i].td1 = 0; /* TD1 TDL */
503 p_eth_desc_dsend[i].td0 = TD0_TFP_TOP_BOTTOM; /* TD0:1frame/1buf1buf, transmission disabled */
505 p_eth_desc_dsend[i - 1].td0 |= TD0_TDLE; /* Set the last descriptor */
507 /* Receive descriptor */
508 for (i = 0; i < NUM_OF_RX_DESCRIPTOR; i++) {
509 p_eth_desc_drecv[i].rd2 = p_memory_top; /* RD2 RBA */
510 p_memory_top += SIZE_OF_BUFFER;
511 p_eth_desc_drecv[i].rd1 = ((uint32_t)SIZE_OF_BUFFER << 16); /* RD1 RBL */
512 p_eth_desc_drecv[i].rd0 = RD0_RACT; /* RD0:reception enabled */
514 p_eth_desc_drecv[i - 1].rd0 |= RD0_RDLE; /* Set the last descriptor */
516 /* Initialize descriptor management information */
521 p_recv_end_desc = NULL;
524 static void lan_reg_set(int32_t link) {
525 /* MAC address setting */
526 ETHERMAHR0 = ((uint32_t)mac_addr[0] << 24)
527 | ((uint32_t)mac_addr[1] << 16)
528 | ((uint32_t)mac_addr[2] << 8)
529 | (uint32_t)mac_addr[3];
530 ETHERMALR0 = ((uint32_t)mac_addr[4] << 8)
531 | (uint32_t)mac_addr[5];
534 ETHERTDLAR0 = (uint32_t)&p_eth_desc_dsend[0];
535 ETHERRDLAR0 = (uint32_t)&p_eth_desc_drecv[0];
536 ETHERTDFAR0 = (uint32_t)&p_eth_desc_dsend[0];
537 ETHERRDFAR0 = (uint32_t)&p_eth_desc_drecv[0];
538 ETHERTDFXR0 = (uint32_t)&p_eth_desc_dsend[NUM_OF_TX_DESCRIPTOR - 1];
539 ETHERRDFXR0 = (uint32_t)&p_eth_desc_drecv[NUM_OF_RX_DESCRIPTOR - 1];
540 ETHERTDFFR0 |= 0x00000001; /* TDLF Transmit Descriptor Queue Last Flag : Last descriptor (1) */
541 ETHERRDFFR0 |= 0x00000001; /* RDLF Receive Descriptor Queue Last Flag : Last descriptor (1) */
542 ETHEREDMR0 |= 0x00000040; /* Little endian */
543 ETHERTRSCER0 &= ~0x0003009F; /* All clear */
544 ETHERTFTR0 &= ~0x000007FF; /* TFT[10:0] Transmit FIFO Threshold : Store and forward modes (H'000) */
545 ETHERFDR0 |= 0x00000707; /* Transmit FIFO Size:2048 bytes, Receive FIFO Size:2048 bytes */
546 ETHERRMCR0 |= 0x00000001; /* RNC Receive Enable Control : Continuous reception enabled (1) */
547 ETHERFCFTR0 &= ~0x001F00FF;
548 ETHERFCFTR0 |= 0x00070007;
549 ETHERRPADIR0 &= ~0x001FFFFF; /* Padding Size:No padding insertion, Padding Slot:Inserts at first byte */
552 ETHERECMR0 &= ~0x04BF2063; /* All clear */
553 ETHERRFLR0 &= ~0x0003FFFF; /* RFL[17:0] Receive Frame Length : 1518 bytes (H'00000) */
554 ETHERAPR0 &= ~0x0000FFFF; /* AP[15:0] Automatic PAUSE : Flow control is disabled (H'0000) */
555 ETHERMPR0 &= ~0x0000FFFF; /* MP[15:0] Manual PAUSE : Flow control is disabled (H'0000) */
556 ETHERTPAUSER0 &= ~0x0000FFFF; /* Upper Limit for Automatic PAUSE Frame : Retransmit count is unlimited */
557 ETHERCSMR &= ~0xC000003F; /* The result of checksum is not written back to the receive descriptor */
558 if ((link == FULL_TX) || (link == FULL_10M) || (link == NEGO_FAIL)) {
559 ETHERECMR0 |= 0x00000002; /* Set to full-duplex mode */
561 ETHERECMR0 &= ~0x00000002; /* Set to half-duplex mode */
564 /* Interrupt-related */
565 if (p_recv_cb_fnc != NULL) {
566 ETHEREESR0 |= 0xFF7F009F; /* Clear all status (by writing 1) */
567 ETHEREESIPR0 |= 0x00040000; /* FR Frame Reception (1) */
568 ETHERECSR0 |= 0x00000011; /* Clear all status (clear by writing 1) */
569 ETHERECSIPR0 &= ~0x00000011; /* PFROIP Disable, ICDIP Disable */
570 InterruptHandlerRegister(ETHERI_IRQn, INT_Ether); /* Ethernet interrupt handler registration */
571 GIC_SetPriority(ETHERI_IRQn, Interrupt_priority); /* Ethernet interrupt priority */
572 GIC_EnableIRQ(ETHERI_IRQn); /* Enables the E-DMAC interrupt */
575 ETHERECMR0 |= 0x00000060; /* RE Enable, TE Enable */
577 /* Enable transmission/reception */
578 if ((start_stop == 1) && ((ETHEREDRRR0 & 0x00000001) == 0)) {
579 ETHEREDRRR0 |= 0x00000001; /* RR */
583 static uint16_t phy_reg_read(uint16_t reg_addr) {
587 mii_cmd(reg_addr, PHY_READ);
595 static void phy_reg_write(uint16_t reg_addr, uint16_t data) {
597 mii_cmd(reg_addr, PHY_WRITE);
604 static void mii_preamble(void) {
607 for (i = 32; i > 0; i--) {
608 /* 1 is output via the MII (Media Independent Interface) block. */
613 static void mii_cmd(uint16_t reg_addr, uint32_t option) {
617 data |= (PHY_ST << 14); /* ST code */
618 data |= (option << 12); /* OP code */
619 data |= (PHY_ADDR << 7); /* PHY Address */
620 data |= (uint16_t)(reg_addr << 2); /* Reg Address */
621 for (i = 14; i > 0; i--) {
622 if ((data & 0x8000) == 0) {
631 static void mii_reg_read(uint16_t *data) {
633 uint16_t reg_data = 0;
635 /* Data are read in one bit at a time */
636 for (i = 16; i > 0; i--) {
637 set_ether_pir(PIR0_MDC_LOW);
638 set_ether_pir(PIR0_MDC_HIGH);
640 reg_data |= (uint16_t)((ETHERPIR0 & PIR0_MDI) >> 3); /* MDI read */
641 set_ether_pir(PIR0_MDC_HIGH);
642 set_ether_pir(PIR0_MDC_LOW);
647 static void mii_reg_write(uint16_t data) {
650 /* Data are written one bit at a time */
651 for (i = 16; i > 0; i--) {
652 if ((data & 0x8000) == 0) {
661 static void mii_z(void) {
662 set_ether_pir(PIR0_MDC_LOW);
663 set_ether_pir(PIR0_MDC_HIGH);
664 set_ether_pir(PIR0_MDC_HIGH);
665 set_ether_pir(PIR0_MDC_LOW);
668 static void mii_write_1(void) {
669 set_ether_pir(PIR0_MDO | PIR0_MMD);
670 set_ether_pir(PIR0_MDO | PIR0_MMD | PIR0_MDC);
671 set_ether_pir(PIR0_MDO | PIR0_MMD | PIR0_MDC);
672 set_ether_pir(PIR0_MDO | PIR0_MMD);
675 static void mii_write_0(void) {
676 set_ether_pir(PIR0_MMD);
677 set_ether_pir(PIR0_MMD | PIR0_MDC);
678 set_ether_pir(PIR0_MMD | PIR0_MDC);
679 set_ether_pir(PIR0_MMD);
682 static void set_ether_pir(uint32_t set_data) {
685 for (i = MDC_WAIT; i > 0; i--) {
686 ETHERPIR0 = set_data;
690 static void wait_100us(int32_t wait_cnt) {
691 volatile int32_t j = LOOP_100us * wait_cnt;