1 /*
2 * Copyright (c) 2024 HPMicro
3 *
4 * SPDX-License-Identifier: BSD-3-Clause
5 *
6 */
7
8 /*---------------------------------------------------------------------
9 * Includes
10 *---------------------------------------------------------------------
11 */
12 #include "hpm_enet_drv.h"
13 #include "hpm_lan8720_regs.h"
14 #include "hpm_lan8720.h"
15
16 /*---------------------------------------------------------------------
17 * Internal API
18 *---------------------------------------------------------------------
19 */
lan8720_check_id(ENET_Type * ptr)20 static bool lan8720_check_id(ENET_Type *ptr)
21 {
22 uint16_t id1, id2;
23
24 id1 = enet_read_phy(ptr, LAN8720_ADDR, LAN8720_PHYID1);
25 id2 = enet_read_phy(ptr, LAN8720_ADDR, LAN8720_PHYID2);
26
27 if (LAN8720_PHYID1_OUI_MSB_GET(id1) == LAN8720_ID1 && LAN8720_PHYID2_OUI_LSB_GET(id2) == LAN8720_ID2) {
28 return true;
29 } else {
30 return false;
31 }
32 }
33
34 /*---------------------------------------------------------------------
35 * API
36 *---------------------------------------------------------------------
37 */
lan8720_reset(ENET_Type * ptr)38 void lan8720_reset(ENET_Type *ptr)
39 {
40 uint16_t data;
41
42 /* PHY reset */
43 enet_write_phy(ptr, LAN8720_ADDR, LAN8720_BMCR, LAN8720_BMCR_RESET_SET(1));
44
45 /* wait until the reset is completed */
46 do {
47 data = enet_read_phy(ptr, LAN8720_ADDR, LAN8720_BMCR);
48 } while (LAN8720_BMCR_RESET_GET(data));
49 }
50
lan8720_basic_mode_default_config(ENET_Type * ptr,lan8720_config_t * config)51 void lan8720_basic_mode_default_config(ENET_Type *ptr, lan8720_config_t *config)
52 {
53 config->loopback = false; /* Disable PCS loopback mode */
54 #if defined(__DISABLE_AUTO_NEGO) && __DISABLE_AUTO_NEGO
55 config->auto_negotiation = false; /* Disable Auto-Negotiation */
56 config->speed = enet_phy_port_speed_100mbps;
57 config->duplex = enet_phy_duplex_full;
58 #else
59 config->auto_negotiation = true; /* Enable Auto-Negotiation */
60 #endif
61 }
62
lan8720_basic_mode_init(ENET_Type * ptr,lan8720_config_t * config)63 bool lan8720_basic_mode_init(ENET_Type *ptr, lan8720_config_t *config)
64 {
65 uint16_t data = 0;
66
67 data |= LAN8720_BMCR_RESET_SET(0) /* Normal operation */
68 | LAN8720_BMCR_LOOPBACK_SET(config->loopback) /* configure PCS loopback mode */
69 | LAN8720_BMCR_ANE_SET(config->auto_negotiation) /* configure Auto-Negotiation */
70 | LAN8720_BMCR_PWD_SET(0) /* Normal operation */
71 | LAN8720_BMCR_ISOLATE_SET(0) /* Normal operation */
72 | LAN8720_BMCR_RESTART_AN_SET(0); /* Normal operation (ignored when Auto-Negotiation is disabled) */
73
74 if (config->auto_negotiation == 0) {
75 data |= LAN8720_BMCR_SPEED_SET(config->speed); /* Set port speed */
76 data |= LAN8720_BMCR_DUPLEX_SET(config->duplex); /* Set duplex mode */
77 }
78
79 /* check the id of lan8720 */
80 if (lan8720_check_id(ptr) == false) {
81 return false;
82 }
83
84 enet_write_phy(ptr, LAN8720_ADDR, LAN8720_BMCR, data);
85
86 return true;
87 }
88
lan8720_get_phy_status(ENET_Type * ptr,enet_phy_status_t * status)89 void lan8720_get_phy_status(ENET_Type *ptr, enet_phy_status_t *status)
90 {
91 uint16_t data;
92
93 data = enet_read_phy(ptr, LAN8720_ADDR, LAN8720_BMSR);
94 status->enet_phy_link = LAN8720_BMSR_LINK_STATUS_GET(data);
95
96 data = enet_read_phy(ptr, LAN8720_ADDR, LAN8720_PSCSR);
97 status->enet_phy_speed = LAN8720_PSCSR_SPEED_GET(data) == 1 ? enet_phy_port_speed_10mbps : enet_phy_port_speed_100mbps;
98 status->enet_phy_duplex = LAN8720_PSCSR_DUPLEX_GET(data);
99 }
100