rtwphyio.c revision 1.4
1 /* $NetBSD: rtwphyio.c,v 1.4 2004/12/25 06:58:37 dyoung Exp $ */ 2 /*- 3 * Copyright (c) 2004, 2005 David Young. All rights reserved. 4 * 5 * Programmed for NetBSD by David Young. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of David Young may not be used to endorse or promote 16 * products derived from this software without specific prior 17 * written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY David Young ``AS IS'' AND ANY 20 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 22 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL David 23 * Young BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 25 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 27 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 28 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 30 * OF SUCH DAMAGE. 31 */ 32 /* 33 * Control input/output with the Philips SA2400 RF front-end and 34 * the baseband processor built into the Realtek RTL8180. 35 */ 36 37 #include <sys/cdefs.h> 38 __KERNEL_RCSID(0, "$NetBSD: rtwphyio.c,v 1.4 2004/12/25 06:58:37 dyoung Exp $"); 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/types.h> 43 44 #include <machine/bus.h> 45 46 #include <net/if.h> 47 #include <net/if_media.h> 48 #include <net/if_ether.h> 49 50 #include <net80211/ieee80211_var.h> 51 #include <net80211/ieee80211_compat.h> 52 #include <net80211/ieee80211_radiotap.h> 53 54 #include <dev/ic/rtwreg.h> 55 #include <dev/ic/max2820reg.h> 56 #include <dev/ic/sa2400reg.h> 57 #include <dev/ic/si4136reg.h> 58 #include <dev/ic/rtwvar.h> 59 #include <dev/ic/rtwphyio.h> 60 #include <dev/ic/rtwphy.h> 61 62 static int rtw_macbangbits_timeout = 100; 63 64 u_int8_t 65 rtw_bbp_read(struct rtw_regs *regs, u_int addr) 66 { 67 KASSERT((addr & ~PRESHIFT(RTW_BB_ADDR_MASK)) == 0); 68 RTW_WRITE(regs, RTW_BB, 69 LSHIFT(addr, RTW_BB_ADDR_MASK) | RTW_BB_RD_MASK | RTW_BB_WR_MASK); 70 delay(10); /* XXX */ 71 RTW_WBR(regs, RTW_BB, RTW_BB); 72 return MASK_AND_RSHIFT(RTW_READ(regs, RTW_BB), RTW_BB_RD_MASK); 73 } 74 75 int 76 rtw_bbp_write(struct rtw_regs *regs, u_int addr, u_int val) 77 { 78 #define BBP_WRITE_ITERS 50 79 #define BBP_WRITE_DELAY 1 80 int i; 81 uint32_t wrbbp, rdbbp; 82 83 RTW_DPRINTF(RTW_DEBUG_PHYIO, 84 ("%s: bbp[%u] <- %u\n", __func__, addr, val)); 85 86 KASSERT((addr & ~PRESHIFT(RTW_BB_ADDR_MASK)) == 0); 87 KASSERT((val & ~PRESHIFT(RTW_BB_WR_MASK)) == 0); 88 89 wrbbp = LSHIFT(addr, RTW_BB_ADDR_MASK) | RTW_BB_WREN | 90 LSHIFT(val, RTW_BB_WR_MASK) | RTW_BB_RD_MASK, 91 92 rdbbp = LSHIFT(addr, RTW_BB_ADDR_MASK) | 93 RTW_BB_WR_MASK | RTW_BB_RD_MASK; 94 95 RTW_DPRINTF(RTW_DEBUG_PHYIO, 96 ("%s: rdbbp = %#08x, wrbbp = %#08x\n", __func__, rdbbp, wrbbp)); 97 98 for (i = BBP_WRITE_ITERS; --i >= 0; ) { 99 RTW_RBW(regs, RTW_BB, RTW_BB); 100 RTW_WRITE(regs, RTW_BB, wrbbp); 101 RTW_SYNC(regs, RTW_BB, RTW_BB); 102 RTW_WRITE(regs, RTW_BB, rdbbp); 103 RTW_SYNC(regs, RTW_BB, RTW_BB); 104 delay(BBP_WRITE_DELAY); /* 1 microsecond */ 105 if (MASK_AND_RSHIFT(RTW_READ(regs, RTW_BB), 106 RTW_BB_RD_MASK) == val) { 107 RTW_DPRINTF(RTW_DEBUG_PHYIO, 108 ("%s: finished in %dus\n", __func__, 109 BBP_WRITE_DELAY * (BBP_WRITE_ITERS - i))); 110 return 0; 111 } 112 delay(BBP_WRITE_DELAY); /* again */ 113 } 114 printf("%s: timeout\n", __func__); 115 return -1; 116 } 117 118 /* Help rtw_rf_hostwrite bang bits to RF over 3-wire interface. */ 119 static __inline void 120 rtw_rf_hostbangbits(struct rtw_regs *regs, u_int32_t bits, int lo_to_hi, 121 u_int nbits) 122 { 123 int i; 124 u_int32_t mask, reg; 125 126 KASSERT(nbits <= 32); 127 128 RTW_DPRINTF(RTW_DEBUG_PHYIO, 129 ("%s: %u bits, %#08x, %s\n", __func__, nbits, bits, 130 (lo_to_hi) ? "lo to hi" : "hi to lo")); 131 132 reg = RTW_PHYCFG_HST; 133 RTW_WRITE(regs, RTW_PHYCFG, reg); 134 RTW_SYNC(regs, RTW_PHYCFG, RTW_PHYCFG); 135 136 if (lo_to_hi) 137 mask = 0x1; 138 else 139 mask = 1 << (nbits - 1); 140 141 for (i = 0; i < nbits; i++) { 142 RTW_DPRINTF(RTW_DEBUG_PHYBITIO, 143 ("%s: bits %#08x mask %#08x -> bit %#08x\n", 144 __func__, bits, mask, bits & mask)); 145 146 if ((bits & mask) != 0) 147 reg |= RTW_PHYCFG_HST_DATA; 148 else 149 reg &= ~RTW_PHYCFG_HST_DATA; 150 151 reg |= RTW_PHYCFG_HST_CLK; 152 RTW_WRITE(regs, RTW_PHYCFG, reg); 153 RTW_SYNC(regs, RTW_PHYCFG, RTW_PHYCFG); 154 155 DELAY(2); /* arbitrary delay */ 156 157 reg &= ~RTW_PHYCFG_HST_CLK; 158 RTW_WRITE(regs, RTW_PHYCFG, reg); 159 RTW_SYNC(regs, RTW_PHYCFG, RTW_PHYCFG); 160 161 if (lo_to_hi) 162 mask <<= 1; 163 else 164 mask >>= 1; 165 } 166 167 reg |= RTW_PHYCFG_HST_EN; 168 KASSERT((reg & RTW_PHYCFG_HST_CLK) == 0); 169 RTW_WRITE(regs, RTW_PHYCFG, reg); 170 RTW_SYNC(regs, RTW_PHYCFG, RTW_PHYCFG); 171 } 172 173 /* Help rtw_rf_macwrite: tell MAC to bang bits to RF over the 3-wire 174 * interface. 175 */ 176 static __inline int 177 rtw_rf_macbangbits(struct rtw_regs *regs, u_int32_t reg) 178 { 179 int i; 180 181 RTW_DPRINTF(RTW_DEBUG_PHY, ("%s: %#08x\n", __func__, reg)); 182 183 RTW_WRITE(regs, RTW_PHYCFG, RTW_PHYCFG_MAC_POLL | reg); 184 185 RTW_WBR(regs, RTW_PHYCFG, RTW_PHYCFG); 186 187 if (rtw_flush_rfio) 188 RTW_READ(regs, RTW_PHYADDR); 189 190 if (rtw_rfio_delay > 0) 191 DELAY(rtw_rfio_delay); 192 193 for (i = rtw_macbangbits_timeout; --i >= 0; delay(1)) { 194 if ((RTW_READ(regs, RTW_PHYCFG) & RTW_PHYCFG_MAC_POLL) == 0) { 195 RTW_DPRINTF(RTW_DEBUG_PHY, 196 ("%s: finished in %dus\n", __func__, 197 rtw_macbangbits_timeout - i)); 198 return 0; 199 } 200 RTW_RBR(regs, RTW_PHYCFG, RTW_PHYCFG); /* XXX paranoia? */ 201 } 202 203 printf("%s: RTW_PHYCFG_MAC_POLL still set.\n", __func__); 204 return -1; 205 } 206 207 static u_int32_t 208 rtw_grf5101_host_crypt(u_int addr, u_int32_t val) 209 { 210 /* TBD */ 211 return 0; 212 } 213 214 static u_int32_t 215 rtw_grf5101_mac_crypt(u_int addr, u_int32_t val) 216 { 217 u_int32_t data_and_addr; 218 #define EXTRACT_NIBBLE(d, which) (((d) >> (4 * (which))) & 0xf) 219 static u_int8_t caesar[16] = {0x0, 0x8, 0x4, 0xc, 220 0x2, 0xa, 0x6, 0xe, 221 0x1, 0x9, 0x5, 0xd, 222 0x3, 0xb, 0x7, 0xf}; 223 224 data_and_addr = caesar[EXTRACT_NIBBLE(val, 2)] | 225 (caesar[EXTRACT_NIBBLE(val, 1)] << 4) | 226 (caesar[EXTRACT_NIBBLE(val, 0)] << 8) | 227 (caesar[(addr >> 1) & 0xf] << 12) | 228 ((addr & 0x1) << 16) | 229 (caesar[EXTRACT_NIBBLE(val, 3)] << 24); 230 return LSHIFT(data_and_addr, 231 RTW_PHYCFG_MAC_PHILIPS_ADDR_MASK|RTW_PHYCFG_MAC_PHILIPS_DATA_MASK); 232 #undef EXTRACT_NIBBLE 233 } 234 235 static __inline const char * 236 rtw_rfchipid_string(enum rtw_rfchipid rfchipid) 237 { 238 switch (rfchipid) { 239 case RTW_RFCHIPID_MAXIM: 240 return "Maxim"; 241 case RTW_RFCHIPID_PHILIPS: 242 return "Philips"; 243 case RTW_RFCHIPID_GCT: 244 return "GCT"; 245 case RTW_RFCHIPID_RFMD: 246 return "RFMD"; 247 case RTW_RFCHIPID_INTERSIL: 248 return "Intersil"; 249 default: 250 return "unknown"; 251 } 252 } 253 254 /* Bang bits over the 3-wire interface. */ 255 int 256 rtw_rf_hostwrite(struct rtw_regs *regs, enum rtw_rfchipid rfchipid, 257 u_int addr, u_int32_t val) 258 { 259 u_int nbits; 260 int lo_to_hi; 261 u_int32_t bits; 262 263 RTW_DPRINTF(RTW_DEBUG_PHYIO, ("%s: %s[%u] <- %#08x\n", __func__, 264 rtw_rfchipid_string(rfchipid), addr, val)); 265 266 switch (rfchipid) { 267 case RTW_RFCHIPID_MAXIM: 268 nbits = 16; 269 lo_to_hi = 0; 270 bits = LSHIFT(val, MAX2820_TWI_DATA_MASK) | 271 LSHIFT(addr, MAX2820_TWI_ADDR_MASK); 272 break; 273 case RTW_RFCHIPID_PHILIPS: 274 KASSERT((addr & ~PRESHIFT(SA2400_TWI_ADDR_MASK)) == 0); 275 KASSERT((val & ~PRESHIFT(SA2400_TWI_DATA_MASK)) == 0); 276 bits = LSHIFT(val, SA2400_TWI_DATA_MASK) | 277 LSHIFT(addr, SA2400_TWI_ADDR_MASK) | SA2400_TWI_WREN; 278 nbits = 32; 279 lo_to_hi = 1; 280 break; 281 case RTW_RFCHIPID_GCT: 282 case RTW_RFCHIPID_RFMD: 283 KASSERT((addr & ~PRESHIFT(SI4126_TWI_ADDR_MASK)) == 0); 284 KASSERT((val & ~PRESHIFT(SI4126_TWI_DATA_MASK)) == 0); 285 if (rfchipid == RTW_RFCHIPID_GCT) 286 bits = rtw_grf5101_host_crypt(addr, val); 287 else { 288 bits = LSHIFT(val, SI4126_TWI_DATA_MASK) | 289 LSHIFT(addr, SI4126_TWI_ADDR_MASK); 290 } 291 nbits = 22; 292 lo_to_hi = 0; 293 break; 294 case RTW_RFCHIPID_INTERSIL: 295 default: 296 printf("%s: unknown rfchipid %d\n", __func__, rfchipid); 297 return -1; 298 } 299 300 rtw_rf_hostbangbits(regs, bits, lo_to_hi, nbits); 301 302 return 0; 303 } 304 305 static uint32_t 306 rtw_maxim_swizzle(u_int addr, uint32_t val) 307 { 308 uint32_t hidata, lodata; 309 310 KASSERT((val & ~(RTW_MAXIM_LODATA_MASK|RTW_MAXIM_HIDATA_MASK)) == 0); 311 lodata = MASK_AND_RSHIFT(val, RTW_MAXIM_LODATA_MASK); 312 hidata = MASK_AND_RSHIFT(val, RTW_MAXIM_HIDATA_MASK); 313 return LSHIFT(lodata, RTW_PHYCFG_MAC_MAXIM_LODATA_MASK) | 314 LSHIFT(hidata, RTW_PHYCFG_MAC_MAXIM_HIDATA_MASK) | 315 LSHIFT(addr, RTW_PHYCFG_MAC_MAXIM_ADDR_MASK); 316 } 317 318 /* Tell the MAC what to bang over the 3-wire interface. */ 319 int 320 rtw_rf_macwrite(struct rtw_regs *regs, enum rtw_rfchipid rfchipid, 321 u_int addr, u_int32_t val) 322 { 323 uint32_t reg; 324 325 RTW_DPRINTF(RTW_DEBUG_PHYIO, ("%s: %s[%u] <- %#08x\n", __func__, 326 rtw_rfchipid_string(rfchipid), addr, val)); 327 328 switch (rfchipid) { 329 case RTW_RFCHIPID_GCT: 330 reg = rtw_grf5101_mac_crypt(addr, val); 331 break; 332 case RTW_RFCHIPID_MAXIM: 333 reg = rtw_maxim_swizzle(addr, val); 334 break; 335 default: /* XXX */ 336 case RTW_RFCHIPID_PHILIPS: 337 KASSERT( 338 (addr & ~PRESHIFT(RTW_PHYCFG_MAC_PHILIPS_ADDR_MASK)) == 0); 339 KASSERT( 340 (val & ~PRESHIFT(RTW_PHYCFG_MAC_PHILIPS_DATA_MASK)) == 0); 341 342 reg = LSHIFT(addr, RTW_PHYCFG_MAC_PHILIPS_ADDR_MASK) | 343 LSHIFT(val, RTW_PHYCFG_MAC_PHILIPS_DATA_MASK); 344 } 345 346 switch (rfchipid) { 347 case RTW_RFCHIPID_GCT: 348 case RTW_RFCHIPID_MAXIM: 349 case RTW_RFCHIPID_RFMD: 350 reg |= RTW_PHYCFG_MAC_RFTYPE_RFMD; 351 break; 352 case RTW_RFCHIPID_INTERSIL: 353 reg |= RTW_PHYCFG_MAC_RFTYPE_INTERSIL; 354 break; 355 case RTW_RFCHIPID_PHILIPS: 356 reg |= RTW_PHYCFG_MAC_RFTYPE_PHILIPS; 357 break; 358 default: 359 printf("%s: unknown rfchipid %d\n", __func__, rfchipid); 360 return -1; 361 } 362 363 return rtw_rf_macbangbits(regs, reg); 364 } 365
Indexes created Wed Sep 24 05:09:52 GMT 2025