[41c9282] | 1 | /* |
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| 2 | * LEON3 Opencores Ethernet MAC Configuration Information |
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| 3 | * |
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| 4 | * COPYRIGHT (c) 2004. |
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| 5 | * Gaisler Research |
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| 6 | * |
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| 7 | * The license and distribution terms for this file may be |
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| 8 | * found in the file LICENSE in this distribution or at |
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| 9 | * http://www.rtems.com/license/LICENSE. |
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| 10 | * |
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| 11 | * $Id$ |
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| 12 | */ |
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| 13 | |
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| 14 | |
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| 15 | #include <bsp.h> |
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| 16 | #include <libchip/open_eth.h> |
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| 17 | #if (OPEN_ETH_DEBUG & OPEN_ETH_DEBUG_PRINT_REGISTERS) |
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| 18 | #include <stdio.h> |
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| 19 | #endif |
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| 20 | |
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| 21 | /* |
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| 22 | * Default sizes of transmit and receive descriptor areas |
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| 23 | */ |
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| 24 | #define RDA_COUNT 16 |
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| 25 | #define TDA_COUNT 16 |
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| 26 | |
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[44b06ca] | 27 | open_eth_configuration_t leon_open_eth_configuration; |
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[41c9282] | 28 | |
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| 29 | int rtems_leon_open_eth_driver_attach( |
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| 30 | struct rtems_bsdnet_ifconfig *config, |
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| 31 | int attach |
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| 32 | ) |
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| 33 | { |
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| 34 | int device_found = 0; |
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| 35 | int i; |
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| 36 | unsigned int conf, iobar; |
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| 37 | unsigned int base_addr = 0; /* avoid warnings */ |
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| 38 | unsigned int eth_irq = 0; /* avoid warnings */ |
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| 39 | |
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| 40 | |
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| 41 | /* Scan for MAC AHB slave interface */ |
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| 42 | for (i = 0; i < amba_conf.ahbslv.devnr; i++) |
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| 43 | { |
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| 44 | conf = amba_get_confword(amba_conf.ahbslv, i, 0); |
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| 45 | if (((amba_vendor(conf) == VENDOR_OPENCORES) && (amba_device(conf) == OPENCORES_ETHMAC)) || |
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| 46 | ((amba_vendor(conf) == VENDOR_GAISLER) && (amba_device(conf) == GAISLER_ETHAHB))) |
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| 47 | { |
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| 48 | iobar = amba_ahb_get_membar(amba_conf.ahbslv, i, 0); |
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| 49 | base_addr = amba_iobar_start(LEON3_IO_AREA, iobar); |
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| 50 | eth_irq = amba_irq(conf) + 0x10; |
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| 51 | device_found = 1; |
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| 52 | break; |
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| 53 | } |
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| 54 | } |
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| 55 | |
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| 56 | |
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[44b06ca] | 57 | if (device_found) |
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[41c9282] | 58 | { |
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| 59 | /* clear control register and reset NIC */ |
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| 60 | *(volatile int *) base_addr = 0; |
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| 61 | *(volatile int *) base_addr = 0x800; |
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| 62 | *(volatile int *) base_addr = 0; |
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| 63 | leon_open_eth_configuration.base_address = base_addr; |
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| 64 | leon_open_eth_configuration.vector = eth_irq; |
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| 65 | leon_open_eth_configuration.txd_count = TDA_COUNT; |
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| 66 | leon_open_eth_configuration.rxd_count = RDA_COUNT; |
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| 67 | /* enable 100 MHz operation only if cpu frequency >= 50 MHz */ |
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| 68 | if (LEON3_Timer_Regs->scaler_reload >= 49) leon_open_eth_configuration.en100MHz = 1; |
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| 69 | if (rtems_open_eth_driver_attach( config, &leon_open_eth_configuration )) { |
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| 70 | LEON_Clear_interrupt(leon_open_eth_configuration.vector); |
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| 71 | LEON_Unmask_interrupt(leon_open_eth_configuration.vector); |
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[44b06ca] | 72 | } |
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[41c9282] | 73 | } |
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| 74 | return 0; |
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| 75 | } |
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