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 16 #include <net/gen/ether.h> 17 #include <net/gen/eth_io.h> 18 19 #include "local.h" 20 #include "dp8390.h" 21 #include "3c503.h" 22 23 #if ENABLE_3C503 24 25 extern u32_t system_hz; 26 27 #define MILLIS_TO_TICKS(m) (((m)*system_hz/1000)+1) 28 29 static void el2_init(dpeth_t *dep); 30 static void el2_stop(dpeth_t *dep); 31 static void milli_delay(unsigned long millis); 32 33 /*===========================================================================* 34 * el2_init * 35 *===========================================================================*/ 36 static void el2_init(dep) 37 dpeth_t * dep; 38 { 39 /* Initalize hardware and data structures. */ 40 int ix, irq; 41 int sendq_nr; 42 int cntr; 43 44 /* Map the address PROM to lower I/O address range */ 45 cntr = inb_el2(dep, EL2_CNTR); 46 outb_el2(dep, EL2_CNTR, cntr | ECNTR_SAPROM); 47 48 /* Read station address from PROM */ 49 for (ix = EL2_EA0; ix <= EL2_EA5; ix += 1) 50 dep->de_address.ea_addr[ix] = inb_el2(dep, ix); 51 52 /* Map the 8390 back to lower I/O address range */ 53 outb_el2(dep, EL2_CNTR, cntr); 54 55 /* Enable memory, but turn off interrupts until we are ready */ 56 outb_el2(dep, EL2_CFGR, ECFGR_IRQOFF); 57 58 dep->de_data_port = dep->de_dp8390_port = dep->de_base_port; 59 dep->de_prog_IO = 0; /* Programmed I/O not yet available */ 60 61 /* Check width of data bus: 62 * 1. Write 0 to WTS bit. The board will drive it to 1 if it is a 63 * 16-bit card. 64 * 2. Select page 2 65 * 3. See if it is a 16-bit card 66 * 4. Select page 0 67 */ 68 outb_el2(dep, DP_CR, CR_PS_P0|CR_DM_ABORT|CR_STP); 69 outb_el2(dep, DP_DCR, 0); 70 outb_el2(dep, DP_CR, CR_PS_P2|CR_DM_ABORT|CR_STP); 71 dep->de_16bit = (inb_el2(dep, DP_DCR) & DCR_WTS) != 0; 72 outb_el2(dep, DP_CR, CR_PS_P0|CR_DM_ABORT|CR_STP); 73 74 /* Allocate one send buffer (1.5KB) per 8KB of on board memory. */ 75 sendq_nr = (dep->de_ramsize - dep->de_offset_page) / 0x2000; 76 if (sendq_nr < 1) 77 sendq_nr = 1; 78 else if (sendq_nr > SENDQ_NR) 79 sendq_nr = SENDQ_NR; 80 81 dep->de_sendq_nr = sendq_nr; 82 for (ix = 0; ix < sendq_nr; ix++) 83 dep->de_sendq[ix].sq_sendpage = (ix * SENDQ_PAGES) + EL2_SM_START_PG; 84 85 dep->de_startpage = (ix * SENDQ_PAGES) + EL2_SM_START_PG; 86 dep->de_stoppage = EL2_SM_STOP_PG; 87 88 outb_el2(dep, EL2_STARTPG, dep->de_startpage); 89 outb_el2(dep, EL2_STOPPG, dep->de_stoppage); 90 91 /* Point the vector pointer registers somewhere ?harmless?. */ 92 outb_el2(dep, EL2_VP2, 0xFF); /* Point at the ROM restart location */ 93 outb_el2(dep, EL2_VP1, 0xFF); /* 0xFFFF:0000 (from original sources) */ 94 outb_el2(dep, EL2_VP0, 0x00); /* - What for protected mode? */ 95 96 /* Set interrupt level for 3c503 */ 97 irq = (dep->de_irq &= ~DEI_DEFAULT); /* Strip the default flag. */ 98 if (irq == 9) irq = 2; 99 if (irq < 2 || irq > 5) panic("bad 3c503 irq configuration: %d", irq); 100 outb_el2(dep, EL2_IDCFG, (0x04 << irq)); 101 102 outb_el2(dep, EL2_DRQCNT, 0x08); /* Set burst size to 8 */ 103 outb_el2(dep, EL2_DMAAH, EL2_SM_START_PG); /* Put start of TX */ 104 outb_el2(dep, EL2_DMAAL, 0x00); /* buffer in the GA DMA reg */ 105 106 outb_el2(dep, EL2_CFGR, ECFGR_NORM); /* Enable shared memory */ 107 108 if (!debug) { 109 printf("%s: 3c503 at %X:%d:%lX\n", 110 dep->de_name, dep->de_base_port, dep->de_irq, 111 dep->de_linmem + dep->de_offset_page); 112 } else { 113 printf("%s: 3Com Etherlink II %sat I/O address 0x%X, " 114 "memory address 0x%lX, irq %d\n", 115 dep->de_name, dep->de_16bit ? "(16-bit) " : "", 116 dep->de_base_port, 117 dep->de_linmem + dep->de_offset_page, 118 dep->de_irq); 119 } 120 } 121 122 /*===========================================================================* 123 * el2_stop * 124 *===========================================================================*/ 125 static void el2_stop(dep) 126 dpeth_t * dep; 127 { 128 /* Stops board by disabling interrupts. */ 129 130 #if DEBUG 131 printf("%s: stopping Etherlink\n", dep->de_name); 132 #endif 133 outb_el2(dep, EL2_CFGR, ECFGR_IRQOFF); 134 return; 135 } 136 137 /*===========================================================================* 138 * el2_probe * 139 *===========================================================================*/ 140 int el2_probe(dep) 141 dpeth_t * dep; 142 { 143 /* Probe for the presence of an EtherLink II card. Initialize memory 144 * addressing if card detected. 145 */ 146 int iobase, membase; 147 int thin; 148 149 /* Thin ethernet or AUI? */ 150 thin = (dep->de_linmem & 1) ? ECNTR_AUI : ECNTR_THIN; 151 152 /* Location registers should have 1 bit set */ 153 if (!(iobase = inb_el2(dep, EL2_IOBASE))) return 0; 154 if (!((membase = inb_el2(dep, EL2_MEMBASE)) & 0xF0)) return 0; 155 if ((iobase & (iobase - 1)) || (membase & (membase - 1))) return 0; 156 157 /* Resets board */ 158 outb_el2(dep, EL2_CNTR, ECNTR_RESET | thin); 159 milli_delay(1); 160 outb_el2(dep, EL2_CNTR, thin); 161 milli_delay(5); 162 163 /* Map the address PROM to lower I/O address range */ 164 outb_el2(dep, EL2_CNTR, ECNTR_SAPROM | thin); 165 if (inb_el2(dep, EL2_EA0) != 0x02 || /* Etherlink II Station address */ 166 inb_el2(dep, EL2_EA1) != 0x60 || /* MUST be 02:60:8c:xx:xx:xx */ 167 inb_el2(dep, EL2_EA2) != 0x8C) 168 return 0; /* No Etherlink board at this address */ 169 170 /* Map the 8390 back to lower I/O address range */ 171 outb_el2(dep, EL2_CNTR, thin); 172 173 /* Setup shared memory addressing for 3c503 */ 174 dep->de_linmem = ((membase & 0xC0) ? EL2_BASE_0D8000 : EL2_BASE_0C8000) + 175 ((membase & 0xA0) ? (EL2_BASE_0CC000 - EL2_BASE_0C8000) : 0x0000); 176 dep->de_offset_page = (EL2_SM_START_PG * DP_PAGESIZE); 177 dep->de_ramsize = (EL2_SM_STOP_PG - EL2_SM_START_PG) * DP_PAGESIZE; 178 179 /* (Bad kludge, something Philip needs to look into. -- kjb) */ 180 dep->de_linmem -= dep->de_offset_page; 181 dep->de_ramsize += dep->de_offset_page; 182 183 /* Board initialization and stop functions */ 184 dep->de_initf = el2_init; 185 dep->de_stopf = el2_stop; 186 return 1; 187 } 188 189 static void milli_delay(unsigned long millis) 190 { 191 tickdelay(MILLIS_TO_TICKS(millis)); 192 } 193 194 #endif /* ENABLE_3C503 */ 195 196 /** 3c503.c **/ 197 198 /* 199 * $PchId: 3c503.c,v 1.3 2003/09/10 15:33:04 philip Exp $ 200 */ 201