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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27 | open_eth_configuration_t leon_open_eth_configuration; |
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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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57 | if (device_found) |
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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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72 | } |
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73 | } |
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74 | return 0; |
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75 | } |
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