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 <net/gen/ether.h> 18 #include <net/gen/eth_io.h> 19 20 #include "local.h" 21 #include "dp8390.h" 22 #include "3c503.h" 23 24 #if ENABLE_3C503 25 26 extern u32_t system_hz; 27 28 #define MILLIS_TO_TICKS(m) (((m)*system_hz/1000)+1) 29 30 static void el2_init(dpeth_t *dep); 31 static void el2_stop(dpeth_t *dep); 32 static void milli_delay(unsigned long millis); 33 34 /*===========================================================================* 35 * el2_init * 36 *===========================================================================*/ 37 static void el2_init(dep) 38 dpeth_t * dep; 39 { 40 /* Initalize hardware and data structures. */ 41 int ix, irq; 42 int sendq_nr; 43 int cntr; 44 45 /* Map the address PROM to lower I/O address range */ 46 cntr = inb_el2(dep, EL2_CNTR); 47 outb_el2(dep, EL2_CNTR, cntr | ECNTR_SAPROM); 48 49 /* Read station address from PROM */ 50 for (ix = EL2_EA0; ix <= EL2_EA5; ix += 1) 51 dep->de_address.ea_addr[ix] = inb_el2(dep, ix); 52 53 /* Map the 8390 back to lower I/O address range */ 54 outb_el2(dep, EL2_CNTR, cntr); 55 56 /* Enable memory, but turn off interrupts until we are ready */ 57 outb_el2(dep, EL2_CFGR, ECFGR_IRQOFF); 58 59 dep->de_data_port = dep->de_dp8390_port = dep->de_base_port; 60 dep->de_prog_IO = 0; /* Programmed I/O not yet available */ 61 62 /* Check width of data bus: 63 * 1. Write 0 to WTS bit. The board will drive it to 1 if it is a 64 * 16-bit card. 65 * 2. Select page 2 66 * 3. See if it is a 16-bit card 67 * 4. Select page 0 68 */ 69 outb_el2(dep, DP_CR, CR_PS_P0|CR_DM_ABORT|CR_STP); 70 outb_el2(dep, DP_DCR, 0); 71 outb_el2(dep, DP_CR, CR_PS_P2|CR_DM_ABORT|CR_STP); 72 dep->de_16bit = (inb_el2(dep, DP_DCR) & DCR_WTS) != 0; 73 outb_el2(dep, DP_CR, CR_PS_P0|CR_DM_ABORT|CR_STP); 74 75 /* Allocate one send buffer (1.5KB) per 8KB of on board memory. */ 76 sendq_nr = (dep->de_ramsize - dep->de_offset_page) / 0x2000; 77 if (sendq_nr < 1) 78 sendq_nr = 1; 79 else if (sendq_nr > SENDQ_NR) 80 sendq_nr = SENDQ_NR; 81 82 dep->de_sendq_nr = sendq_nr; 83 for (ix = 0; ix < sendq_nr; ix++) 84 dep->de_sendq[ix].sq_sendpage = (ix * SENDQ_PAGES) + EL2_SM_START_PG; 85 86 dep->de_startpage = (ix * SENDQ_PAGES) + EL2_SM_START_PG; 87 dep->de_stoppage = EL2_SM_STOP_PG; 88 89 outb_el2(dep, EL2_STARTPG, dep->de_startpage); 90 outb_el2(dep, EL2_STOPPG, dep->de_stoppage); 91 92 /* Point the vector pointer registers somewhere ?harmless?. */ 93 outb_el2(dep, EL2_VP2, 0xFF); /* Point at the ROM restart location */ 94 outb_el2(dep, EL2_VP1, 0xFF); /* 0xFFFF:0000 (from original sources) */ 95 outb_el2(dep, EL2_VP0, 0x00); /* - What for protected mode? */ 96 97 /* Set interrupt level for 3c503 */ 98 irq = (dep->de_irq &= ~DEI_DEFAULT); /* Strip the default flag. */ 99 if (irq == 9) irq = 2; 100 if (irq < 2 || irq > 5) panic("bad 3c503 irq configuration: %d", irq); 101 outb_el2(dep, EL2_IDCFG, (0x04 << irq)); 102 103 outb_el2(dep, EL2_DRQCNT, 0x08); /* Set burst size to 8 */ 104 outb_el2(dep, EL2_DMAAH, EL2_SM_START_PG); /* Put start of TX */ 105 outb_el2(dep, EL2_DMAAL, 0x00); /* buffer in the GA DMA reg */ 106 107 outb_el2(dep, EL2_CFGR, ECFGR_NORM); /* Enable shared memory */ 108 109 if (!debug) { 110 printf("%s: 3c503 at %X:%d:%lX\n", 111 dep->de_name, dep->de_base_port, dep->de_irq, 112 dep->de_linmem + dep->de_offset_page); 113 } else { 114 printf("%s: 3Com Etherlink II %sat I/O address 0x%X, " 115 "memory address 0x%lX, irq %d\n", 116 dep->de_name, dep->de_16bit ? "(16-bit) " : "", 117 dep->de_base_port, 118 dep->de_linmem + dep->de_offset_page, 119 dep->de_irq); 120 } 121 } 122 123 /*===========================================================================* 124 * el2_stop * 125 *===========================================================================*/ 126 static void el2_stop(dep) 127 dpeth_t * dep; 128 { 129 /* Stops board by disabling interrupts. */ 130 131 #if DEBUG 132 printf("%s: stopping Etherlink\n", dep->de_name); 133 #endif 134 outb_el2(dep, EL2_CFGR, ECFGR_IRQOFF); 135 return; 136 } 137 138 /*===========================================================================* 139 * el2_probe * 140 *===========================================================================*/ 141 int el2_probe(dep) 142 dpeth_t * dep; 143 { 144 /* Probe for the presence of an EtherLink II card. Initialize memory 145 * addressing if card detected. 146 */ 147 int iobase, membase; 148 int thin; 149 150 /* Thin ethernet or AUI? */ 151 thin = (dep->de_linmem & 1) ? ECNTR_AUI : ECNTR_THIN; 152 153 /* Location registers should have 1 bit set */ 154 if (!(iobase = inb_el2(dep, EL2_IOBASE))) return 0; 155 if (!((membase = inb_el2(dep, EL2_MEMBASE)) & 0xF0)) return 0; 156 if ((iobase & (iobase - 1)) || (membase & (membase - 1))) return 0; 157 158 /* Resets board */ 159 outb_el2(dep, EL2_CNTR, ECNTR_RESET | thin); 160 milli_delay(1); 161 outb_el2(dep, EL2_CNTR, thin); 162 milli_delay(5); 163 164 /* Map the address PROM to lower I/O address range */ 165 outb_el2(dep, EL2_CNTR, ECNTR_SAPROM | thin); 166 if (inb_el2(dep, EL2_EA0) != 0x02 || /* Etherlink II Station address */ 167 inb_el2(dep, EL2_EA1) != 0x60 || /* MUST be 02:60:8c:xx:xx:xx */ 168 inb_el2(dep, EL2_EA2) != 0x8C) 169 return 0; /* No Etherlink board at this address */ 170 171 /* Map the 8390 back to lower I/O address range */ 172 outb_el2(dep, EL2_CNTR, thin); 173 174 /* Setup shared memory addressing for 3c503 */ 175 dep->de_linmem = ((membase & 0xC0) ? EL2_BASE_0D8000 : EL2_BASE_0C8000) + 176 ((membase & 0xA0) ? (EL2_BASE_0CC000 - EL2_BASE_0C8000) : 0x0000); 177 dep->de_offset_page = (EL2_SM_START_PG * DP_PAGESIZE); 178 dep->de_ramsize = (EL2_SM_STOP_PG - EL2_SM_START_PG) * DP_PAGESIZE; 179 180 /* (Bad kludge, something Philip needs to look into. -- kjb) */ 181 dep->de_linmem -= dep->de_offset_page; 182 dep->de_ramsize += dep->de_offset_page; 183 184 /* Board initialization and stop functions */ 185 dep->de_initf = el2_init; 186 dep->de_stopf = el2_stop; 187 return 1; 188 } 189 190 static void milli_delay(unsigned long millis) 191 { 192 tickdelay(MILLIS_TO_TICKS(millis)); 193 } 194 195 #endif /* ENABLE_3C503 */ 196 197 /** 3c503.c **/ 198 199 /* 200 * $PchId: 3c503.c,v 1.3 2003/09/10 15:33:04 philip Exp $ 201 */ 202