rtwphyio.c revision 1.6
1 /* $NetBSD: rtwphyio.c,v 1.6 2005/01/02 04:23:03 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 1.6 2005/01/02 04:23:03 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 uint8_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, uint32_t bits, int lo_to_hi, 121 u_int nbits) 122 { 123 int i; 124 uint32_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, uint32_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 for (i = rtw_macbangbits_timeout; --i >= 0; delay(1)) { 188 if ((RTW_READ(regs, RTW_PHYCFG) & RTW_PHYCFG_MAC_POLL) == 0) { 189 RTW_DPRINTF(RTW_DEBUG_PHY, 190 ("%s: finished in %dus\n", __func__, 191 rtw_macbangbits_timeout - i)); 192 return 0; 193 } 194 RTW_RBR(regs, RTW_PHYCFG, RTW_PHYCFG); /* XXX paranoia? */ 195 } 196 197 printf("%s: RTW_PHYCFG_MAC_POLL still set.\n", __func__); 198 return -1; 199 } 200 201 static uint32_t 202 rtw_grf5101_host_crypt(u_int addr, uint32_t val) 203 { 204 /* TBD */ 205 return 0; 206 } 207 208 static uint32_t 209 rtw_grf5101_mac_crypt(u_int addr, uint32_t val) 210 { 211 uint32_t data_and_addr; 212 #define EXTRACT_NIBBLE(d, which) (((d) >> (4 * (which))) & 0xf) 213 static uint8_t caesar[16] = {0x0, 0x8, 0x4, 0xc, 214 0x2, 0xa, 0x6, 0xe, 215 0x1, 0x9, 0x5, 0xd, 216 0x3, 0xb, 0x7, 0xf}; 217 218 data_and_addr = caesar[EXTRACT_NIBBLE(val, 2)] | 219 (caesar[EXTRACT_NIBBLE(val, 1)] << 4) | 220 (caesar[EXTRACT_NIBBLE(val, 0)] << 8) | 221 (caesar[(addr >> 1) & 0xf] << 12) | 222 ((addr & 0x1) << 16) | 223 (caesar[EXTRACT_NIBBLE(val, 3)] << 24); 224 return LSHIFT(data_and_addr, 225 RTW_PHYCFG_MAC_PHILIPS_ADDR_MASK|RTW_PHYCFG_MAC_PHILIPS_DATA_MASK); 226 #undef EXTRACT_NIBBLE 227 } 228 229 static __inline const char * 230 rtw_rfchipid_string(enum rtw_rfchipid rfchipid) 231 { 232 switch (rfchipid) { 233 case RTW_RFCHIPID_MAXIM: 234 return "Maxim"; 235 case RTW_RFCHIPID_PHILIPS: 236 return "Philips"; 237 case RTW_RFCHIPID_GCT: 238 return "GCT"; 239 case RTW_RFCHIPID_RFMD: 240 return "RFMD"; 241 case RTW_RFCHIPID_INTERSIL: 242 return "Intersil"; 243 default: 244 return "unknown"; 245 } 246 } 247 248 /* Bang bits over the 3-wire interface. */ 249 int 250 rtw_rf_hostwrite(struct rtw_regs *regs, enum rtw_rfchipid rfchipid, 251 u_int addr, uint32_t val) 252 { 253 u_int nbits; 254 int lo_to_hi; 255 uint32_t bits; 256 257 RTW_DPRINTF(RTW_DEBUG_PHYIO, ("%s: %s[%u] <- %#08x\n", __func__, 258 rtw_rfchipid_string(rfchipid), addr, val)); 259 260 switch (rfchipid) { 261 case RTW_RFCHIPID_MAXIM: 262 nbits = 16; 263 lo_to_hi = 0; 264 bits = LSHIFT(val, MAX2820_TWI_DATA_MASK) | 265 LSHIFT(addr, MAX2820_TWI_ADDR_MASK); 266 break; 267 case RTW_RFCHIPID_PHILIPS: 268 KASSERT((addr & ~PRESHIFT(SA2400_TWI_ADDR_MASK)) == 0); 269 KASSERT((val & ~PRESHIFT(SA2400_TWI_DATA_MASK)) == 0); 270 bits = LSHIFT(val, SA2400_TWI_DATA_MASK) | 271 LSHIFT(addr, SA2400_TWI_ADDR_MASK) | SA2400_TWI_WREN; 272 nbits = 32; 273 lo_to_hi = 1; 274 break; 275 case RTW_RFCHIPID_GCT: 276 case RTW_RFCHIPID_RFMD: 277 KASSERT((addr & ~PRESHIFT(SI4126_TWI_ADDR_MASK)) == 0); 278 KASSERT((val & ~PRESHIFT(SI4126_TWI_DATA_MASK)) == 0); 279 if (rfchipid == RTW_RFCHIPID_GCT) 280 bits = rtw_grf5101_host_crypt(addr, val); 281 else { 282 bits = LSHIFT(val, SI4126_TWI_DATA_MASK) | 283 LSHIFT(addr, SI4126_TWI_ADDR_MASK); 284 } 285 nbits = 22; 286 lo_to_hi = 0; 287 break; 288 case RTW_RFCHIPID_INTERSIL: 289 default: 290 printf("%s: unknown rfchipid %d\n", __func__, rfchipid); 291 return -1; 292 } 293 294 rtw_rf_hostbangbits(regs, bits, lo_to_hi, nbits); 295 296 return 0; 297 } 298 299 static uint32_t 300 rtw_maxim_swizzle(u_int addr, uint32_t val) 301 { 302 uint32_t hidata, lodata; 303 304 KASSERT((val & ~(RTW_MAXIM_LODATA_MASK|RTW_MAXIM_HIDATA_MASK)) == 0); 305 lodata = MASK_AND_RSHIFT(val, RTW_MAXIM_LODATA_MASK); 306 hidata = MASK_AND_RSHIFT(val, RTW_MAXIM_HIDATA_MASK); 307 return LSHIFT(lodata, RTW_PHYCFG_MAC_MAXIM_LODATA_MASK) | 308 LSHIFT(hidata, RTW_PHYCFG_MAC_MAXIM_HIDATA_MASK) | 309 LSHIFT(addr, RTW_PHYCFG_MAC_MAXIM_ADDR_MASK); 310 } 311 312 /* Tell the MAC what to bang over the 3-wire interface. */ 313 int 314 rtw_rf_macwrite(struct rtw_regs *regs, enum rtw_rfchipid rfchipid, 315 u_int addr, uint32_t val) 316 { 317 uint32_t reg; 318 319 RTW_DPRINTF(RTW_DEBUG_PHYIO, ("%s: %s[%u] <- %#08x\n", __func__, 320 rtw_rfchipid_string(rfchipid), addr, val)); 321 322 switch (rfchipid) { 323 case RTW_RFCHIPID_GCT: 324 reg = rtw_grf5101_mac_crypt(addr, val); 325 break; 326 case RTW_RFCHIPID_MAXIM: 327 reg = rtw_maxim_swizzle(addr, val); 328 break; 329 default: /* XXX */ 330 case RTW_RFCHIPID_PHILIPS: 331 KASSERT( 332 (addr & ~PRESHIFT(RTW_PHYCFG_MAC_PHILIPS_ADDR_MASK)) == 0); 333 KASSERT( 334 (val & ~PRESHIFT(RTW_PHYCFG_MAC_PHILIPS_DATA_MASK)) == 0); 335 336 reg = LSHIFT(addr, RTW_PHYCFG_MAC_PHILIPS_ADDR_MASK) | 337 LSHIFT(val, RTW_PHYCFG_MAC_PHILIPS_DATA_MASK); 338 } 339 340 switch (rfchipid) { 341 case RTW_RFCHIPID_GCT: 342 case RTW_RFCHIPID_MAXIM: 343 case RTW_RFCHIPID_RFMD: 344 reg |= RTW_PHYCFG_MAC_RFTYPE_RFMD; 345 break; 346 case RTW_RFCHIPID_INTERSIL: 347 reg |= RTW_PHYCFG_MAC_RFTYPE_INTERSIL; 348 break; 349 case RTW_RFCHIPID_PHILIPS: 350 reg |= RTW_PHYCFG_MAC_RFTYPE_PHILIPS; 351 break; 352 default: 353 printf("%s: unknown rfchipid %d\n", __func__, rfchipid); 354 return -1; 355 } 356 357 return rtw_rf_macbangbits(regs, reg); 358 } 359
Indexes created Tue Sep 23 07:09:52 GMT 2025