1 /*
2 * Driver for Synopsys DesignWare MAC
3 *
4 * Copyright (c) 2021 BayLibre SAS
5 *
6 * SPDX-License-Identifier: Apache-2.0
7 */
8
9
10 #define LOG_MODULE_NAME dwmac_plat
11 #define LOG_LEVEL CONFIG_ETHERNET_LOG_LEVEL
12 #include <zephyr/logging/log.h>
13 LOG_MODULE_REGISTER(LOG_MODULE_NAME);
14
15 #define DT_DRV_COMPAT snps_designware_ethernet
16
17 #include <sys/types.h>
18 #include <zephyr/kernel/mm.h>
19 #include <zephyr/kernel.h>
20 #include <zephyr/cache.h>
21 #include <zephyr/net/ethernet.h>
22 #include <zephyr/irq.h>
23
24 #include "eth_dwmac_priv.h"
25
dwmac_bus_init(struct dwmac_priv * p)26 int dwmac_bus_init(struct dwmac_priv *p)
27 {
28 p->base_addr = DT_INST_REG_ADDR(0);
29 return 0;
30 }
31
32 #if (CONFIG_DCACHE_LINE_SIZE+0 == 0)
33 #error "CONFIG_DCACHE_LINE_SIZE must be configured to a non-zero value"
34 #endif
35
36 static struct dwmac_dma_desc __aligned(CONFIG_DCACHE_LINE_SIZE)
37 dwmac_tx_rx_descriptors[NB_TX_DESCS + NB_RX_DESCS];
38
39 static const uint8_t dwmac_mac_addr[6] = DT_INST_PROP(0, local_mac_address);
40
dwmac_platform_init(struct dwmac_priv * p)41 void dwmac_platform_init(struct dwmac_priv *p)
42 {
43 uint8_t *desc_uncached_addr;
44 uintptr_t desc_phys_addr;
45
46 /* make sure no valid cache lines map to the descriptor area */
47 sys_cache_data_invd_range(dwmac_tx_rx_descriptors,
48 sizeof(dwmac_tx_rx_descriptors));
49
50 desc_phys_addr = k_mem_phys_addr(dwmac_tx_rx_descriptors);
51
52 /* remap descriptor rings uncached */
53 k_mem_map_phys_bare(&desc_uncached_addr, desc_phys_addr,
54 sizeof(dwmac_tx_rx_descriptors),
55 K_MEM_PERM_RW | K_MEM_CACHE_NONE);
56
57 LOG_DBG("desc virt %p uncached %p phys 0x%lx",
58 dwmac_tx_rx_descriptors, desc_uncached_addr, desc_phys_addr);
59
60 p->tx_descs = (void *)desc_uncached_addr;
61 desc_uncached_addr += NB_TX_DESCS * sizeof(struct dwmac_dma_desc);
62 p->rx_descs = (void *)desc_uncached_addr;
63
64 p->tx_descs_phys = desc_phys_addr;
65 desc_phys_addr += NB_TX_DESCS * sizeof(struct dwmac_dma_desc);
66 p->rx_descs_phys = desc_phys_addr;
67
68 /* basic configuration for this platform */
69 REG_WRITE(MAC_CONF,
70 MAC_CONF_PS |
71 MAC_CONF_FES |
72 MAC_CONF_DM);
73 REG_WRITE(DMA_SYSBUS_MODE,
74 DMA_SYSBUS_MODE_AAL |
75 #ifdef CONFIG_64BIT
76 DMA_SYSBUS_MODE_EAME |
77 #endif
78 DMA_SYSBUS_MODE_FB);
79
80 /* set up IRQs (still masked for now) */
81 IRQ_CONNECT(DT_INST_IRQN(0), DT_INST_IRQ(0, priority), dwmac_isr,
82 DEVICE_DT_INST_GET(0), 0);
83 irq_enable(DT_INST_IRQN(0));
84
85 /* retrieve MAC address */
86 memcpy(p->mac_addr, dwmac_mac_addr, sizeof(p->mac_addr));
87 }
88
89 /* Our private device instance */
90 static struct dwmac_priv dwmac_instance;
91
92 ETH_NET_DEVICE_DT_INST_DEFINE(0,
93 dwmac_probe,
94 NULL,
95 &dwmac_instance,
96 NULL,
97 CONFIG_ETH_INIT_PRIORITY,
98 &dwmac_api,
99 NET_ETH_MTU);
100
