| /* |
| * Driver for Synopsys DesignWare MAC |
| * |
| * Copyright (c) 2021 BayLibre SAS |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| * |
| * STM32H7X specific glue. |
| */ |
| |
| |
| #define LOG_MODULE_NAME dwmac_plat |
| #define LOG_LEVEL CONFIG_ETHERNET_LOG_LEVEL |
| #include <zephyr/logging/log.h> |
| LOG_MODULE_REGISTER(LOG_MODULE_NAME); |
| |
| /* be compatible with the HAL-based driver here */ |
| #define DT_DRV_COMPAT st_stm32_ethernet |
| |
| #include <sys/types.h> |
| #include <zephyr/kernel.h> |
| #include <zephyr/net/ethernet.h> |
| #include <ethernet/eth.h> |
| #include <zephyr/drivers/clock_control.h> |
| #include <zephyr/drivers/clock_control/stm32_clock_control.h> |
| #include <zephyr/drivers/pinctrl.h> |
| #include <zephyr/irq.h> |
| |
| #include "eth_dwmac_priv.h" |
| |
| PINCTRL_DT_INST_DEFINE(0); |
| static const struct pinctrl_dev_config *eth0_pcfg = |
| PINCTRL_DT_INST_DEV_CONFIG_GET(0); |
| |
| static const struct stm32_pclken pclken = { |
| .bus = DT_INST_CLOCKS_CELL_BY_NAME(0, stmmaceth, bus), |
| .enr = DT_INST_CLOCKS_CELL_BY_NAME(0, stmmaceth, bits), |
| }; |
| static const struct stm32_pclken pclken_tx = { |
| .bus = DT_INST_CLOCKS_CELL_BY_NAME(0, mac_clk_tx, bus), |
| .enr = DT_INST_CLOCKS_CELL_BY_NAME(0, mac_clk_tx, bits), |
| }; |
| static const struct stm32_pclken pclken_rx = { |
| .bus = DT_INST_CLOCKS_CELL_BY_NAME(0, mac_clk_rx, bus), |
| .enr = DT_INST_CLOCKS_CELL_BY_NAME(0, mac_clk_rx, bits), |
| }; |
| |
| int dwmac_bus_init(struct dwmac_priv *p) |
| { |
| uint32_t reg_addr, reg_val; |
| int ret; |
| |
| p->clock = DEVICE_DT_GET(STM32_CLOCK_CONTROL_NODE); |
| |
| if (!device_is_ready(p->clock)) { |
| LOG_ERR("clock control device not ready"); |
| return -ENODEV; |
| } |
| |
| ret = clock_control_on(p->clock, (clock_control_subsys_t)&pclken); |
| ret |= clock_control_on(p->clock, (clock_control_subsys_t)&pclken_tx); |
| ret |= clock_control_on(p->clock, (clock_control_subsys_t)&pclken_rx); |
| if (ret) { |
| LOG_ERR("Failed to enable ethernet clock"); |
| return -EIO; |
| } |
| |
| ret = pinctrl_apply_state(eth0_pcfg, PINCTRL_STATE_DEFAULT); |
| if (ret < 0) { |
| LOG_ERR("Could not configure ethernet pins"); |
| return ret; |
| } |
| |
| /* set SYSCFGEN in RCC_APB4ENR */ |
| reg_addr = DT_REG_ADDR(DT_INST(0, st_stm32h7_rcc)) + 0xf4; |
| reg_val = sys_read32(reg_addr); |
| sys_write32(reg_val | BIT(1), reg_addr); |
| |
| /* set RMII mode in SYSCFG_PMCR */ |
| reg_addr = 0x58000404; /* no DT node? */ |
| reg_val = sys_read32(reg_addr); |
| sys_write32(reg_val | 0x03800000, reg_addr); |
| |
| p->base_addr = DT_INST_REG_ADDR(0); |
| return 0; |
| } |
| |
| #if defined(CONFIG_NOCACHE_MEMORY) |
| #define __desc_mem __nocache __aligned(4) |
| #else |
| #error "missing memory attribute for descriptors" |
| #endif |
| |
| /* Descriptor rings in uncached memory */ |
| static struct dwmac_dma_desc dwmac_tx_descs[NB_TX_DESCS] __desc_mem; |
| static struct dwmac_dma_desc dwmac_rx_descs[NB_RX_DESCS] __desc_mem; |
| |
| void dwmac_platform_init(struct dwmac_priv *p) |
| { |
| p->tx_descs = dwmac_tx_descs; |
| p->rx_descs = dwmac_rx_descs; |
| |
| /* basic configuration for this platform */ |
| REG_WRITE(MAC_CONF, |
| MAC_CONF_PS | |
| MAC_CONF_FES | |
| MAC_CONF_DM); |
| REG_WRITE(DMA_SYSBUS_MODE, |
| DMA_SYSBUS_MODE_AAL | |
| DMA_SYSBUS_MODE_FB); |
| |
| /* set up IRQs (still masked for now) */ |
| IRQ_CONNECT(DT_INST_IRQN(0), DT_INST_IRQ(0, priority), dwmac_isr, |
| DEVICE_DT_INST_GET(0), 0); |
| irq_enable(DT_INST_IRQN(0)); |
| |
| /* create MAC address */ |
| gen_random_mac(p->mac_addr, 0x00, 0x80, 0xE1); |
| } |
| |
| /* Our private device instance */ |
| static struct dwmac_priv dwmac_instance; |
| |
| ETH_NET_DEVICE_DT_INST_DEFINE(0, |
| dwmac_probe, |
| NULL, |
| &dwmac_instance, |
| NULL, |
| CONFIG_ETH_INIT_PRIORITY, |
| &dwmac_api, |
| NET_ETH_MTU); |