sdk56800c.asm (7688B)
1 ; 2 ; 3 ; 4 ; This license is set out in https://raw.githubusercontent.com/Broadcom-Network-Switching-Software/OpenBCM/master/Legal/LICENSE file. 5 ; 6 ; Copyright 2007-2019 Broadcom Inc. All rights reserved. 7 ; 8 ; 9 ; This is the default program for the (20 GE port) BCM56800 SDKs. 10 ; To start it, use the following commands from BCM: 11 ; 12 ; led load sdk56800c.hex 13 ; led auto on 14 ; led start 15 ; 16 ; The are 2 LEDs per Gig port one for Link(Left) and one for activity(Right). 17 ; 18 ; There are two bits per gigabit Ethernet LED with the following colors: 19 ; ZERO, ZERO Black 20 ; ZERO, ONE Amber 21 ; ONE, ZERO Green 22 ; 23 ; Each chip drives only its own LEDs and needs to write them in the order: 24 ; L01, A01, L02, A02, ..., L20, A20 25 ; 26 ; Link up/down info cannot be derived from LINKEN or LINKUP, as the LED 27 ; processor does not always have access to link status. This program 28 ; assumes link status is kept current in bit 0 of RAM byte (0x80 + portnum). 29 ; Generally, a program running on the main CPU must update these 30 ; locations on link change; see linkscan callback in 31 ; $SDK/src/appl/diag/ledproc.c. 32 ; 33 ; Current implementation: 34 ; 35 ; L01 reflects port 1 link status: 36 ; Black: no link 37 ; Amber: 10 Mb/s 38 ; Green: 100 Mb/s 39 ; Alternating green/amber: 1000 Mb/s 40 ; Very brief flashes of black at 1 Hz: half duplex 41 ; Longer periods of black: collisions in progress 42 ; 43 ; A01 reflects port 1 activity (even if port is down) 44 ; Black: idle 45 ; Green: RX (pulse extended to 1/3 sec) 46 ; Amber: TX (pulse extended to 1/3 sec, takes precedence over RX) 47 ; Green/Amber alternating at 6 Hz: both RX and TX 48 ; 49 ; Note: 50 ; To provide consistent behavior, the gigabit LED patterns match 51 ; those in sdk5605.asm. 52 ; 53 54 SECOND_TICKS EQU 30 55 56 MIN_PORT EQU 0 57 MAX_PORT EQU 19 58 NUM_PORT EQU 20 59 60 ; The TX/RX activity lights will be extended for ACT_EXT_TICKS 61 ; so they will be more visible. 62 63 ACT_EXT_TICKS EQU (SECOND_TICKS/3) 64 GIG_ALT_TICKS EQU (SECOND_TICKS/2) 65 HD_OFF_TICKS EQU (SECOND_TICKS/20) 66 HD_ON_TICKS EQU (SECOND_TICKS-HD_ON_TICKS) 67 TXRX_ALT_TICKS EQU (SECOND_TICKS/6) 68 69 ; 70 ; Main Update Routine 71 ; 72 ; This routine is called once per tick. 73 ; 74 75 update: 76 sub a,a ; ld a,MIN_PORT (but only one instr) 77 78 up1: 79 port a 80 ld (PORT_NUM),a 81 82 call activity ; Left LED for this port 83 call link_status ; Right LED for this port 84 85 ld a,(PORT_NUM) 86 inc a 87 cmp a,NUM_PORT 88 jnz up1 89 90 ; Update various timers 91 92 ld b,GIG_ALT_COUNT 93 inc (b) 94 ld a,(b) 95 cmp a,GIG_ALT_TICKS 96 jc up2 97 ld (b),0 98 up2: 99 100 ld b,HD_COUNT 101 inc (b) 102 ld a,(b) 103 cmp a,HD_ON_TICKS+HD_OFF_TICKS 104 jc up3 105 ld (b),0 106 up3: 107 108 ld b,TXRX_ALT_COUNT 109 inc (b) 110 ld a,(b) 111 cmp a,TXRX_ALT_TICKS 112 jc up4 113 ld (b),0 114 up4: 115 116 send 80 ; 2 * 2 * 20 117 118 ; 119 ; activity 120 ; 121 ; This routine calculates the activity LED for the current port. 122 ; It extends the activity lights using timers (new activity overrides 123 ; and resets the timers). 124 ; 125 ; Inputs: (PORT_NUM) 126 ; Outputs: Two bits sent to LED stream 127 ; 128 129 activity: 130 pushst RX 131 pop 132 jnc act1 133 134 ld b,RX_TIMERS ; Start RX LED extension timer 135 add b,(PORT_NUM) 136 ld a,ACT_EXT_TICKS 137 ld (b),a 138 139 act1: 140 pushst TX 141 pop 142 jnc act2 143 144 ld b,TX_TIMERS ; Start TX LED extension timer 145 add b,(PORT_NUM) 146 ld a,ACT_EXT_TICKS 147 ld (b),a 148 149 act2: 150 ld b,TX_TIMERS ; Check TX LED extension timer 151 add b,(PORT_NUM) 152 153 dec (b) 154 jnc act3 ; TX active? 155 inc (b) 156 157 ld b,RX_TIMERS ; Check RX LED extension timer 158 add b,(PORT_NUM) 159 160 dec (b) ; Extend LED green if only RX active 161 jnc led_green 162 inc (b) 163 164 jmp led_black ; No activity 165 166 act3: ; TX is active, see if RX also active 167 ld b,RX_TIMERS 168 add b,(PORT_NUM) 169 170 dec (b) ; RX also active? 171 jnc act4 172 inc (b) 173 174 jmp led_amber ; Only TX active 175 176 act4: ; Both TX and RX active 177 ld b,(TXRX_ALT_COUNT) 178 cmp b,TXRX_ALT_TICKS/2 179 jc led_amber ; Fast alternation of green/amber 180 jmp led_green 181 182 ; 183 ; link_status 184 ; 185 ; This routine calculates the link status LED for the current port. 186 ; 187 ; Inputs: (PORT_NUM) 188 ; Outputs: Two bits sent to LED stream 189 ; Destroys: a, b 190 ; 191 192 link_status: 193 pushst DUPLEX ; Skip blink code if full duplex 194 pop 195 jc ls1 196 197 pushst COLL ; Check for collision in half duplex 198 pop 199 jc led_black 200 201 ld a,(HD_COUNT) ; Provide blink for half duplex 202 cmp a,HD_OFF_TICKS 203 jc led_black 204 205 ls1: 206 ld a,(PORT_NUM) ; Check for link down 207 call get_link 208 jnc led_black 209 210 pushst SPEED_C ; Check for 100Mb speed 211 pop 212 jc led_green 213 214 pushst SPEED_M ; Check for 10Mb (i.e. not 100 or 1000) 215 pop 216 jnc led_amber 217 218 ld a,(GIG_ALT_COUNT) 219 cmp a,GIG_ALT_TICKS/2 220 jc led_amber 221 222 jmp led_green 223 224 ; 225 ; get_link 226 ; 227 ; This routine finds the link status LED for a port. 228 ; Link info is in bit 0 of the byte read from PORTDATA[port] 229 ; 230 ; Inputs: Port number in a 231 ; Outputs: Carry flag set if link is up, clear if link is down. 232 ; Destroys: a, b 233 ; 234 235 get_link: 236 ld b,PORTDATA 237 add b,a 238 ld b,(b) 239 tst b,0 240 ret 241 242 ; 243 ; led_black, led_amber, led_green 244 ; 245 ; Inputs: None 246 ; Outputs: Two bits to the LED stream indicating color 247 ; Destroys: None 248 ; 249 250 led_black: 251 pushst ZERO 252 pack 253 pushst ZERO 254 pack 255 ret 256 257 led_amber: 258 pushst ZERO 259 pack 260 pushst ONE 261 pack 262 ret 263 264 led_green: 265 pushst ONE 266 pack 267 pushst ZERO 268 pack 269 ret 270 271 ; 272 ; Variables (SDK software initializes LED memory from 0x80-0xff to 0) 273 ; 274 275 TXRX_ALT_COUNT equ 0xe0 276 HD_COUNT equ 0xe1 277 GIG_ALT_COUNT equ 0xe2 278 PORT_NUM equ 0xe3 279 280 ; 281 ; Port data, which must be updated continually by main CPU's 282 ; linkscan task. See $SDK/src/appl/diag/ledproc.c for examples. 283 ; In this program, bit 0 is assumed to contain the link up/down status. 284 ; 285 286 PORTDATA equ 0x80 ; Size 24 + 4? bytes 287 288 ; 289 ; LED extension timers 290 ; 291 292 RX_TIMERS equ 0xa0+0 ; NUM_PORT bytes 293 TX_TIMERS equ 0xa0+NUM_PORT ; NUM_PORT bytes 294 295 ; 296 ; Symbolic names for the bits of the port status fields 297 ; 298 299 RX equ 0x0 ; received packet 300 TX equ 0x1 ; transmitted packet 301 COLL equ 0x2 ; collision indicator 302 SPEED_C equ 0x3 ; 100 Mbps 303 SPEED_M equ 0x4 ; 1000 Mbps 304 DUPLEX equ 0x5 ; half/full duplex 305 FLOW equ 0x6 ; flow control capable 306 LINKUP equ 0x7 ; link down/up status 307 LINKEN equ 0x8 ; link disabled/enabled status 308 ZERO equ 0xE ; always 0 309 ONE equ 0xF ; always 1