1 /* 2 * 3c503.c A shared memory driver for Etherlink II board. 3 * 4 * Created: Dec. 20, 1996 by G. Falzoni <falzoni@marina.scn.de> 5 * 6 * Inspired by the TNET package by M. Ostrowski, the driver for Linux 7 * by D. Becker, the Crynwr 3c503 packet driver, and the Amoeba driver. 8 * 9 * It works in shared memory mode and should be used with the 10 * device driver for NS 8390 based cards of Minix. Programmed 11 * I/O could be used as well but would result in poor performance. 12 */ 13 14 #include <minix/drivers.h> 15 #include <minix/netdriver.h> 16 17 #include "local.h" 18 #include "dp8390.h" 19 #include "3c503.h" 20 21 #if ENABLE_3C503 22 23 extern u32_t system_hz; 24 25 #define MILLIS_TO_TICKS(m) (((m)*system_hz/1000)+1) 26 27 static void el2_init(dpeth_t *dep); 28 static void el2_stop(dpeth_t *dep); 29 30 /*===========================================================================* 31 * el2_init * 32 *===========================================================================*/ 33 static void el2_init(dep) 34 dpeth_t * dep; 35 { 36 /* Initalize hardware and data structures. */ 37 int ix, irq; 38 int sendq_nr; 39 int cntr; 40 41 /* Map the address PROM to lower I/O address range */ 42 cntr = inb_el2(dep, EL2_CNTR); 43 outb_el2(dep, EL2_CNTR, cntr | ECNTR_SAPROM); 44 45 /* Read station address from PROM */ 46 for (ix = EL2_EA0; ix <= EL2_EA5; ix += 1) 47 dep->de_address.na_addr[ix] = inb_el2(dep, ix); 48 49 /* Map the 8390 back to lower I/O address range */ 50 outb_el2(dep, EL2_CNTR, cntr); 51 52 /* Enable memory, but turn off interrupts until we are ready */ 53 outb_el2(dep, EL2_CFGR, ECFGR_IRQOFF); 54 55 dep->de_data_port = dep->de_dp8390_port = dep->de_base_port; 56 dep->de_prog_IO = 0; /* Programmed I/O not yet available */ 57 58 /* Check width of data bus: 59 * 1. Write 0 to WTS bit. The board will drive it to 1 if it is a 60 * 16-bit card. 61 * 2. Select page 2 62 * 3. See if it is a 16-bit card 63 * 4. Select page 0 64 */ 65 outb_el2(dep, DP_CR, CR_PS_P0|CR_DM_ABORT|CR_STP); 66 outb_el2(dep, DP_DCR, 0); 67 outb_el2(dep, DP_CR, CR_PS_P2|CR_DM_ABORT|CR_STP); 68 dep->de_16bit = (inb_el2(dep, DP_DCR) & DCR_WTS) != 0; 69 outb_el2(dep, DP_CR, CR_PS_P0|CR_DM_ABORT|CR_STP); 70 71 /* Allocate one send buffer (1.5KB) per 8KB of on board memory. */ 72 sendq_nr = (dep->de_ramsize - dep->de_offset_page) / 0x2000; 73 if (sendq_nr < 1) 74 sendq_nr = 1; 75 else if (sendq_nr > SENDQ_NR) 76 sendq_nr = SENDQ_NR; 77 78 dep->de_sendq_nr = sendq_nr; 79 for (ix = 0; ix < sendq_nr; ix++) 80 dep->de_sendq[ix].sq_sendpage = (ix * SENDQ_PAGES) + EL2_SM_START_PG; 81 82 dep->de_startpage = (ix * SENDQ_PAGES) + EL2_SM_START_PG; 83 dep->de_stoppage = EL2_SM_STOP_PG; 84 85 outb_el2(dep, EL2_STARTPG, dep->de_startpage); 86 outb_el2(dep, EL2_STOPPG, dep->de_stoppage); 87 88 /* Point the vector pointer registers somewhere ?harmless?. */ 89 outb_el2(dep, EL2_VP2, 0xFF); /* Point at the ROM restart location */ 90 outb_el2(dep, EL2_VP1, 0xFF); /* 0xFFFF:0000 (from original sources) */ 91 outb_el2(dep, EL2_VP0, 0x00); /* - What for protected mode? */ 92 93 /* Set interrupt level for 3c503 */ 94 irq = (dep->de_irq &= ~DEI_DEFAULT); /* Strip the default flag. */ 95 if (irq == 9) irq = 2; 96 if (irq < 2 || irq > 5) panic("bad 3c503 irq configuration: %d", irq); 97 outb_el2(dep, EL2_IDCFG, (0x04 << irq)); 98 99 outb_el2(dep, EL2_DRQCNT, 0x08); /* Set burst size to 8 */ 100 outb_el2(dep, EL2_DMAAH, EL2_SM_START_PG); /* Put start of TX */ 101 outb_el2(dep, EL2_DMAAL, 0x00); /* buffer in the GA DMA reg */ 102 103 outb_el2(dep, EL2_CFGR, ECFGR_NORM); /* Enable shared memory */ 104 105 if (!debug) { 106 printf("%s: 3c503 at %X:%d:%lX\n", 107 netdriver_name(), dep->de_base_port, dep->de_irq, 108 dep->de_linmem + dep->de_offset_page); 109 } else { 110 printf("%s: 3Com Etherlink II %sat I/O address 0x%X, " 111 "memory address 0x%lX, irq %d\n", 112 netdriver_name(), dep->de_16bit ? "(16-bit) " : "", 113 dep->de_base_port, 114 dep->de_linmem + dep->de_offset_page, 115 dep->de_irq); 116 } 117 } 118 119 /*===========================================================================* 120 * el2_stop * 121 *===========================================================================*/ 122 static void el2_stop(dep) 123 dpeth_t * dep; 124 { 125 /* Stops board by disabling interrupts. */ 126 127 #if DEBUG 128 printf("%s: stopping Etherlink\n", netdriver_name()); 129 #endif 130 outb_el2(dep, EL2_CFGR, ECFGR_IRQOFF); 131 return; 132 } 133 134 /*===========================================================================* 135 * el2_probe * 136 *===========================================================================*/ 137 int el2_probe(dep) 138 dpeth_t * dep; 139 { 140 /* Probe for the presence of an EtherLink II card. Initialize memory 141 * addressing if card detected. 142 */ 143 int iobase, membase; 144 int thin; 145 146 /* Thin ethernet or AUI? */ 147 thin = (dep->de_linmem & 1) ? ECNTR_AUI : ECNTR_THIN; 148 149 /* Location registers should have 1 bit set */ 150 if (!(iobase = inb_el2(dep, EL2_IOBASE))) return 0; 151 if (!((membase = inb_el2(dep, EL2_MEMBASE)) & 0xF0)) return 0; 152 if ((iobase & (iobase - 1)) || (membase & (membase - 1))) return 0; 153 154 /* Resets board */ 155 outb_el2(dep, EL2_CNTR, ECNTR_RESET | thin); 156 micro_delay(1000); 157 outb_el2(dep, EL2_CNTR, thin); 158 micro_delay(5000); 159 160 /* Map the address PROM to lower I/O address range */ 161 outb_el2(dep, EL2_CNTR, ECNTR_SAPROM | thin); 162 if (inb_el2(dep, EL2_EA0) != 0x02 || /* Etherlink II Station address */ 163 inb_el2(dep, EL2_EA1) != 0x60 || /* MUST be 02:60:8c:xx:xx:xx */ 164 inb_el2(dep, EL2_EA2) != 0x8C) 165 return 0; /* No Etherlink board at this address */ 166 167 /* Map the 8390 back to lower I/O address range */ 168 outb_el2(dep, EL2_CNTR, thin); 169 170 /* Setup shared memory addressing for 3c503 */ 171 dep->de_linmem = ((membase & 0xC0) ? EL2_BASE_0D8000 : EL2_BASE_0C8000) + 172 ((membase & 0xA0) ? (EL2_BASE_0CC000 - EL2_BASE_0C8000) : 0x0000); 173 dep->de_offset_page = (EL2_SM_START_PG * DP_PAGESIZE); 174 dep->de_ramsize = (EL2_SM_STOP_PG - EL2_SM_START_PG) * DP_PAGESIZE; 175 176 /* (Bad kludge, something Philip needs to look into. -- kjb) */ 177 dep->de_linmem -= dep->de_offset_page; 178 dep->de_ramsize += dep->de_offset_page; 179 180 /* Board initialization and stop functions */ 181 dep->de_initf = el2_init; 182 dep->de_stopf = el2_stop; 183 return 1; 184 } 185 186 #endif /* ENABLE_3C503 */ 187 188 /** 3c503.c **/ 189 190 /* 191 * $PchId: 3c503.c,v 1.3 2003/09/10 15:33:04 philip Exp $ 192 */ 193