From 22f3e3c64addcefee992eed572d758a6eab2313b Mon Sep 17 00:00:00 2001 From: Vijay Kumar Banerjee Date: Tue, 16 Feb 2021 16:41:54 -0700 Subject: Add support for building bsp specific net drivers --- bsps/riscv/griscv/net/griscv_greth.c | 59 ++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 bsps/riscv/griscv/net/griscv_greth.c (limited to 'bsps/riscv') diff --git a/bsps/riscv/griscv/net/griscv_greth.c b/bsps/riscv/griscv/net/griscv_greth.c new file mode 100644 index 0000000..e5c05fd --- /dev/null +++ b/bsps/riscv/griscv/net/griscv_greth.c @@ -0,0 +1,59 @@ +/* + * LEON3 Opencores Ethernet MAC Configuration Information + * + * COPYRIGHT (c) 2004. + * Gaisler Research + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.org/license/LICENSE. + */ + +#include +#include +#include +#include +#include +/*#if (GRETH_DEBUG & GRETH_DEBUG_PRINT_REGISTERS)*/ +#include +/*#endif*/ + +/* + * Default sizes of transmit and receive descriptor areas + */ +#define RDA_COUNT 32 +#define TDA_COUNT 32 + +greth_configuration_t griscv_greth_configuration; + +int rtems_griscv_greth_driver_attach( + struct rtems_bsdnet_ifconfig *config, + int attach +) +{ + unsigned int base_addr = 0; /* avoid warnings */ + unsigned int eth_irq = 0; /* avoid warnings */ + struct ambapp_dev *adev; + struct ambapp_apb_info *apb; + + /* Scan for MAC AHB slave interface */ + adev = (void *)ambapp_for_each(&ambapp_plb, (OPTIONS_ALL|OPTIONS_APB_SLVS), + VENDOR_GAISLER, GAISLER_ETHMAC, + ambapp_find_by_idx, NULL); + if (adev) { + apb = DEV_TO_APB(adev); + base_addr = apb->start; + eth_irq = apb->common.irq; + + /* clear control register and reset NIC */ + *(volatile int *) base_addr = 0; + *(volatile int *) base_addr = GRETH_CTRL_RST; + *(volatile int *) base_addr = 0; + griscv_greth_configuration.base_address = (void*)base_addr; + griscv_greth_configuration.vector = eth_irq; /* on LEON vector is IRQ no. */ + griscv_greth_configuration.txd_count = TDA_COUNT; + griscv_greth_configuration.rxd_count = RDA_COUNT; + rtems_greth_driver_attach(config, &griscv_greth_configuration); + } + return 0; +} -- cgit v1.2.3