balrog | 0264592 | 2007-11-03 12:50:46 +0000 | [diff] [blame] | 1 | /* |
| 2 | * TI OMAP on-chip I2C controller. Only "new I2C" mode supported. |
| 3 | * |
| 4 | * Copyright (C) 2007 Andrzej Zaborowski <balrog@zabor.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License as |
| 8 | * published by the Free Software Foundation; either version 2 of |
| 9 | * the License, or (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 19 | * MA 02111-1307 USA |
| 20 | */ |
pbrook | 87ecb68 | 2007-11-17 17:14:51 +0000 | [diff] [blame] | 21 | #include "hw.h" |
| 22 | #include "i2c.h" |
| 23 | #include "omap.h" |
balrog | 0264592 | 2007-11-03 12:50:46 +0000 | [diff] [blame] | 24 | |
| 25 | struct omap_i2c_s { |
| 26 | target_phys_addr_t base; |
| 27 | qemu_irq irq; |
| 28 | qemu_irq drq[2]; |
| 29 | i2c_slave slave; |
| 30 | i2c_bus *bus; |
| 31 | |
balrog | 2988547 | 2008-02-10 17:02:23 +0000 | [diff] [blame] | 32 | uint8_t revision; |
balrog | 0264592 | 2007-11-03 12:50:46 +0000 | [diff] [blame] | 33 | uint8_t mask; |
| 34 | uint16_t stat; |
| 35 | uint16_t dma; |
| 36 | uint16_t count; |
| 37 | int count_cur; |
| 38 | uint32_t fifo; |
| 39 | int rxlen; |
| 40 | int txlen; |
| 41 | uint16_t control; |
| 42 | uint16_t addr[2]; |
| 43 | uint8_t divider; |
| 44 | uint8_t times[2]; |
| 45 | uint16_t test; |
| 46 | }; |
| 47 | |
balrog | 2988547 | 2008-02-10 17:02:23 +0000 | [diff] [blame] | 48 | #define OMAP2_INTR_REV 0x34 |
| 49 | #define OMAP2_GC_REV 0x34 |
| 50 | |
balrog | 0264592 | 2007-11-03 12:50:46 +0000 | [diff] [blame] | 51 | static void omap_i2c_interrupts_update(struct omap_i2c_s *s) |
| 52 | { |
| 53 | qemu_set_irq(s->irq, s->stat & s->mask); |
| 54 | if ((s->dma >> 15) & 1) /* RDMA_EN */ |
| 55 | qemu_set_irq(s->drq[0], (s->stat >> 3) & 1); /* RRDY */ |
| 56 | if ((s->dma >> 7) & 1) /* XDMA_EN */ |
| 57 | qemu_set_irq(s->drq[1], (s->stat >> 4) & 1); /* XRDY */ |
| 58 | } |
| 59 | |
| 60 | /* These are only stubs now. */ |
| 61 | static void omap_i2c_event(i2c_slave *i2c, enum i2c_event event) |
| 62 | { |
| 63 | struct omap_i2c_s *s = (struct omap_i2c_s *) i2c; |
| 64 | |
| 65 | if ((~s->control >> 15) & 1) /* I2C_EN */ |
| 66 | return; |
| 67 | |
| 68 | switch (event) { |
| 69 | case I2C_START_SEND: |
| 70 | case I2C_START_RECV: |
| 71 | s->stat |= 1 << 9; /* AAS */ |
| 72 | break; |
| 73 | case I2C_FINISH: |
| 74 | s->stat |= 1 << 2; /* ARDY */ |
| 75 | break; |
| 76 | case I2C_NACK: |
| 77 | s->stat |= 1 << 1; /* NACK */ |
| 78 | break; |
| 79 | } |
| 80 | |
| 81 | omap_i2c_interrupts_update(s); |
| 82 | } |
| 83 | |
| 84 | static int omap_i2c_rx(i2c_slave *i2c) |
| 85 | { |
| 86 | struct omap_i2c_s *s = (struct omap_i2c_s *) i2c; |
| 87 | uint8_t ret = 0; |
| 88 | |
| 89 | if ((~s->control >> 15) & 1) /* I2C_EN */ |
| 90 | return -1; |
| 91 | |
| 92 | if (s->txlen) |
| 93 | ret = s->fifo >> ((-- s->txlen) << 3) & 0xff; |
| 94 | else |
| 95 | s->stat |= 1 << 10; /* XUDF */ |
| 96 | s->stat |= 1 << 4; /* XRDY */ |
| 97 | |
| 98 | omap_i2c_interrupts_update(s); |
| 99 | return ret; |
| 100 | } |
| 101 | |
| 102 | static int omap_i2c_tx(i2c_slave *i2c, uint8_t data) |
| 103 | { |
| 104 | struct omap_i2c_s *s = (struct omap_i2c_s *) i2c; |
| 105 | |
| 106 | if ((~s->control >> 15) & 1) /* I2C_EN */ |
| 107 | return 1; |
| 108 | |
| 109 | if (s->rxlen < 4) |
| 110 | s->fifo |= data << ((s->rxlen ++) << 3); |
| 111 | else |
| 112 | s->stat |= 1 << 11; /* ROVR */ |
| 113 | s->stat |= 1 << 3; /* RRDY */ |
| 114 | |
| 115 | omap_i2c_interrupts_update(s); |
| 116 | return 1; |
| 117 | } |
| 118 | |
| 119 | static void omap_i2c_fifo_run(struct omap_i2c_s *s) |
| 120 | { |
| 121 | int ack = 1; |
| 122 | |
| 123 | if (!i2c_bus_busy(s->bus)) |
| 124 | return; |
| 125 | |
| 126 | if ((s->control >> 2) & 1) { /* RM */ |
| 127 | if ((s->control >> 1) & 1) { /* STP */ |
| 128 | i2c_end_transfer(s->bus); |
| 129 | s->control &= ~(1 << 1); /* STP */ |
| 130 | s->count_cur = s->count; |
balrog | 2988547 | 2008-02-10 17:02:23 +0000 | [diff] [blame] | 131 | s->txlen = 0; |
balrog | 0264592 | 2007-11-03 12:50:46 +0000 | [diff] [blame] | 132 | } else if ((s->control >> 9) & 1) { /* TRX */ |
| 133 | while (ack && s->txlen) |
| 134 | ack = (i2c_send(s->bus, |
| 135 | (s->fifo >> ((-- s->txlen) << 3)) & |
| 136 | 0xff) >= 0); |
| 137 | s->stat |= 1 << 4; /* XRDY */ |
| 138 | } else { |
| 139 | while (s->rxlen < 4) |
| 140 | s->fifo |= i2c_recv(s->bus) << ((s->rxlen ++) << 3); |
| 141 | s->stat |= 1 << 3; /* RRDY */ |
| 142 | } |
| 143 | } else { |
| 144 | if ((s->control >> 9) & 1) { /* TRX */ |
| 145 | while (ack && s->count_cur && s->txlen) { |
| 146 | ack = (i2c_send(s->bus, |
| 147 | (s->fifo >> ((-- s->txlen) << 3)) & |
| 148 | 0xff) >= 0); |
| 149 | s->count_cur --; |
| 150 | } |
| 151 | if (ack && s->count_cur) |
| 152 | s->stat |= 1 << 4; /* XRDY */ |
| 153 | if (!s->count_cur) { |
| 154 | s->stat |= 1 << 2; /* ARDY */ |
| 155 | s->control &= ~(1 << 10); /* MST */ |
| 156 | } |
| 157 | } else { |
| 158 | while (s->count_cur && s->rxlen < 4) { |
| 159 | s->fifo |= i2c_recv(s->bus) << ((s->rxlen ++) << 3); |
| 160 | s->count_cur --; |
| 161 | } |
| 162 | if (s->rxlen) |
| 163 | s->stat |= 1 << 3; /* RRDY */ |
| 164 | } |
| 165 | if (!s->count_cur) { |
| 166 | if ((s->control >> 1) & 1) { /* STP */ |
| 167 | i2c_end_transfer(s->bus); |
| 168 | s->control &= ~(1 << 1); /* STP */ |
| 169 | s->count_cur = s->count; |
balrog | 2988547 | 2008-02-10 17:02:23 +0000 | [diff] [blame] | 170 | s->txlen = 0; |
balrog | 0264592 | 2007-11-03 12:50:46 +0000 | [diff] [blame] | 171 | } else { |
| 172 | s->stat |= 1 << 2; /* ARDY */ |
| 173 | s->control &= ~(1 << 10); /* MST */ |
| 174 | } |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | s->stat |= (!ack) << 1; /* NACK */ |
| 179 | if (!ack) |
| 180 | s->control &= ~(1 << 1); /* STP */ |
| 181 | } |
| 182 | |
| 183 | void omap_i2c_reset(struct omap_i2c_s *s) |
| 184 | { |
| 185 | s->mask = 0; |
| 186 | s->stat = 0; |
| 187 | s->dma = 0; |
| 188 | s->count = 0; |
| 189 | s->count_cur = 0; |
| 190 | s->fifo = 0; |
| 191 | s->rxlen = 0; |
| 192 | s->txlen = 0; |
| 193 | s->control = 0; |
| 194 | s->addr[0] = 0; |
| 195 | s->addr[1] = 0; |
| 196 | s->divider = 0; |
| 197 | s->times[0] = 0; |
| 198 | s->times[1] = 0; |
| 199 | s->test = 0; |
| 200 | } |
| 201 | |
| 202 | static uint32_t omap_i2c_read(void *opaque, target_phys_addr_t addr) |
| 203 | { |
| 204 | struct omap_i2c_s *s = (struct omap_i2c_s *) opaque; |
balrog | cf965d2 | 2007-11-04 12:19:22 +0000 | [diff] [blame] | 205 | int offset = addr & OMAP_MPUI_REG_MASK; |
balrog | 0264592 | 2007-11-03 12:50:46 +0000 | [diff] [blame] | 206 | uint16_t ret; |
| 207 | |
| 208 | switch (offset) { |
| 209 | case 0x00: /* I2C_REV */ |
balrog | 2988547 | 2008-02-10 17:02:23 +0000 | [diff] [blame] | 210 | return s->revision; /* REV */ |
balrog | 0264592 | 2007-11-03 12:50:46 +0000 | [diff] [blame] | 211 | |
| 212 | case 0x04: /* I2C_IE */ |
| 213 | return s->mask; |
| 214 | |
| 215 | case 0x08: /* I2C_STAT */ |
| 216 | return s->stat | (i2c_bus_busy(s->bus) << 12); |
| 217 | |
| 218 | case 0x0c: /* I2C_IV */ |
balrog | 2988547 | 2008-02-10 17:02:23 +0000 | [diff] [blame] | 219 | if (s->revision >= OMAP2_INTR_REV) |
| 220 | break; |
balrog | 0264592 | 2007-11-03 12:50:46 +0000 | [diff] [blame] | 221 | ret = ffs(s->stat & s->mask); |
| 222 | if (ret) |
| 223 | s->stat ^= 1 << (ret - 1); |
| 224 | omap_i2c_interrupts_update(s); |
| 225 | return ret; |
| 226 | |
balrog | 2988547 | 2008-02-10 17:02:23 +0000 | [diff] [blame] | 227 | case 0x10: /* I2C_SYSS */ |
| 228 | return (s->control >> 15) & 1; /* I2C_EN */ |
| 229 | |
balrog | 0264592 | 2007-11-03 12:50:46 +0000 | [diff] [blame] | 230 | case 0x14: /* I2C_BUF */ |
| 231 | return s->dma; |
| 232 | |
| 233 | case 0x18: /* I2C_CNT */ |
| 234 | return s->count_cur; /* DCOUNT */ |
| 235 | |
| 236 | case 0x1c: /* I2C_DATA */ |
| 237 | ret = 0; |
| 238 | if (s->control & (1 << 14)) { /* BE */ |
| 239 | ret |= ((s->fifo >> 0) & 0xff) << 8; |
| 240 | ret |= ((s->fifo >> 8) & 0xff) << 0; |
| 241 | } else { |
| 242 | ret |= ((s->fifo >> 8) & 0xff) << 8; |
| 243 | ret |= ((s->fifo >> 0) & 0xff) << 0; |
| 244 | } |
| 245 | if (s->rxlen == 1) { |
| 246 | s->stat |= 1 << 15; /* SBD */ |
| 247 | s->rxlen = 0; |
| 248 | } else if (s->rxlen > 1) { |
| 249 | if (s->rxlen > 2) |
| 250 | s->fifo >>= 16; |
| 251 | s->rxlen -= 2; |
| 252 | } else |
| 253 | /* XXX: remote access (qualifier) error - what's that? */; |
| 254 | if (!s->rxlen) { |
balrog | 2988547 | 2008-02-10 17:02:23 +0000 | [diff] [blame] | 255 | s->stat &= ~(1 << 3); /* RRDY */ |
balrog | 0264592 | 2007-11-03 12:50:46 +0000 | [diff] [blame] | 256 | if (((s->control >> 10) & 1) && /* MST */ |
| 257 | ((~s->control >> 9) & 1)) { /* TRX */ |
| 258 | s->stat |= 1 << 2; /* ARDY */ |
| 259 | s->control &= ~(1 << 10); /* MST */ |
| 260 | } |
| 261 | } |
| 262 | s->stat &= ~(1 << 11); /* ROVR */ |
| 263 | omap_i2c_fifo_run(s); |
| 264 | omap_i2c_interrupts_update(s); |
| 265 | return ret; |
| 266 | |
balrog | 2988547 | 2008-02-10 17:02:23 +0000 | [diff] [blame] | 267 | case 0x20: /* I2C_SYSC */ |
| 268 | return 0; |
| 269 | |
balrog | 0264592 | 2007-11-03 12:50:46 +0000 | [diff] [blame] | 270 | case 0x24: /* I2C_CON */ |
| 271 | return s->control; |
| 272 | |
| 273 | case 0x28: /* I2C_OA */ |
| 274 | return s->addr[0]; |
| 275 | |
| 276 | case 0x2c: /* I2C_SA */ |
| 277 | return s->addr[1]; |
| 278 | |
| 279 | case 0x30: /* I2C_PSC */ |
| 280 | return s->divider; |
| 281 | |
| 282 | case 0x34: /* I2C_SCLL */ |
| 283 | return s->times[0]; |
| 284 | |
| 285 | case 0x38: /* I2C_SCLH */ |
| 286 | return s->times[1]; |
| 287 | |
| 288 | case 0x3c: /* I2C_SYSTEST */ |
| 289 | if (s->test & (1 << 15)) { /* ST_EN */ |
| 290 | s->test ^= 0xa; |
| 291 | return s->test; |
| 292 | } else |
| 293 | return s->test & ~0x300f; |
| 294 | } |
| 295 | |
| 296 | OMAP_BAD_REG(addr); |
| 297 | return 0; |
| 298 | } |
| 299 | |
| 300 | static void omap_i2c_write(void *opaque, target_phys_addr_t addr, |
| 301 | uint32_t value) |
| 302 | { |
| 303 | struct omap_i2c_s *s = (struct omap_i2c_s *) opaque; |
balrog | cf965d2 | 2007-11-04 12:19:22 +0000 | [diff] [blame] | 304 | int offset = addr & OMAP_MPUI_REG_MASK; |
balrog | 0264592 | 2007-11-03 12:50:46 +0000 | [diff] [blame] | 305 | int nack; |
| 306 | |
| 307 | switch (offset) { |
| 308 | case 0x00: /* I2C_REV */ |
balrog | 0264592 | 2007-11-03 12:50:46 +0000 | [diff] [blame] | 309 | case 0x0c: /* I2C_IV */ |
balrog | 2988547 | 2008-02-10 17:02:23 +0000 | [diff] [blame] | 310 | case 0x10: /* I2C_SYSS */ |
| 311 | OMAP_RO_REG(addr); |
balrog | 0264592 | 2007-11-03 12:50:46 +0000 | [diff] [blame] | 312 | return; |
| 313 | |
| 314 | case 0x04: /* I2C_IE */ |
balrog | 2988547 | 2008-02-10 17:02:23 +0000 | [diff] [blame] | 315 | s->mask = value & (s->revision < OMAP2_GC_REV ? 0x1f : 0x3f); |
| 316 | break; |
| 317 | |
| 318 | case 0x08: /* I2C_STAT */ |
| 319 | if (s->revision < OMAP2_INTR_REV) { |
| 320 | OMAP_RO_REG(addr); |
| 321 | return; |
| 322 | } |
| 323 | |
| 324 | s->stat &= ~(value & 0x3f); |
| 325 | omap_i2c_interrupts_update(s); |
balrog | 0264592 | 2007-11-03 12:50:46 +0000 | [diff] [blame] | 326 | break; |
| 327 | |
| 328 | case 0x14: /* I2C_BUF */ |
| 329 | s->dma = value & 0x8080; |
| 330 | if (value & (1 << 15)) /* RDMA_EN */ |
| 331 | s->mask &= ~(1 << 3); /* RRDY_IE */ |
| 332 | if (value & (1 << 7)) /* XDMA_EN */ |
| 333 | s->mask &= ~(1 << 4); /* XRDY_IE */ |
| 334 | break; |
| 335 | |
| 336 | case 0x18: /* I2C_CNT */ |
| 337 | s->count = value; /* DCOUNT */ |
| 338 | break; |
| 339 | |
| 340 | case 0x1c: /* I2C_DATA */ |
| 341 | if (s->txlen > 2) { |
| 342 | /* XXX: remote access (qualifier) error - what's that? */ |
| 343 | break; |
| 344 | } |
| 345 | s->fifo <<= 16; |
| 346 | s->txlen += 2; |
| 347 | if (s->control & (1 << 14)) { /* BE */ |
| 348 | s->fifo |= ((value >> 8) & 0xff) << 8; |
| 349 | s->fifo |= ((value >> 0) & 0xff) << 0; |
| 350 | } else { |
| 351 | s->fifo |= ((value >> 0) & 0xff) << 8; |
| 352 | s->fifo |= ((value >> 8) & 0xff) << 0; |
| 353 | } |
| 354 | s->stat &= ~(1 << 10); /* XUDF */ |
| 355 | if (s->txlen > 2) |
| 356 | s->stat &= ~(1 << 4); /* XRDY */ |
| 357 | omap_i2c_fifo_run(s); |
| 358 | omap_i2c_interrupts_update(s); |
| 359 | break; |
| 360 | |
balrog | 2988547 | 2008-02-10 17:02:23 +0000 | [diff] [blame] | 361 | case 0x20: /* I2C_SYSC */ |
| 362 | if (s->revision < OMAP2_INTR_REV) { |
| 363 | OMAP_BAD_REG(addr); |
| 364 | return; |
| 365 | } |
| 366 | |
| 367 | if (value & 2) |
balrog | 0264592 | 2007-11-03 12:50:46 +0000 | [diff] [blame] | 368 | omap_i2c_reset(s); |
balrog | 2988547 | 2008-02-10 17:02:23 +0000 | [diff] [blame] | 369 | break; |
| 370 | |
| 371 | case 0x24: /* I2C_CON */ |
| 372 | s->control = value & 0xcf87; |
| 373 | if (~value & (1 << 15)) { /* I2C_EN */ |
| 374 | if (s->revision < OMAP2_INTR_REV) |
| 375 | omap_i2c_reset(s); |
balrog | 0264592 | 2007-11-03 12:50:46 +0000 | [diff] [blame] | 376 | break; |
| 377 | } |
balrog | 2988547 | 2008-02-10 17:02:23 +0000 | [diff] [blame] | 378 | if ((value & (1 << 15)) && !(value & (1 << 10))) { /* MST */ |
balrog | 0264592 | 2007-11-03 12:50:46 +0000 | [diff] [blame] | 379 | printf("%s: I^2C slave mode not supported\n", __FUNCTION__); |
| 380 | break; |
| 381 | } |
balrog | 2988547 | 2008-02-10 17:02:23 +0000 | [diff] [blame] | 382 | if ((value & (1 << 15)) && value & (1 << 8)) { /* XA */ |
balrog | 0264592 | 2007-11-03 12:50:46 +0000 | [diff] [blame] | 383 | printf("%s: 10-bit addressing mode not supported\n", __FUNCTION__); |
| 384 | break; |
| 385 | } |
balrog | 2988547 | 2008-02-10 17:02:23 +0000 | [diff] [blame] | 386 | if ((value & (1 << 15)) && value & (1 << 0)) { /* STT */ |
balrog | 0264592 | 2007-11-03 12:50:46 +0000 | [diff] [blame] | 387 | nack = !!i2c_start_transfer(s->bus, s->addr[1], /* SA */ |
| 388 | (~value >> 9) & 1); /* TRX */ |
| 389 | s->stat |= nack << 1; /* NACK */ |
| 390 | s->control &= ~(1 << 0); /* STT */ |
| 391 | if (nack) |
| 392 | s->control &= ~(1 << 1); /* STP */ |
balrog | 2988547 | 2008-02-10 17:02:23 +0000 | [diff] [blame] | 393 | else { |
| 394 | s->count_cur = s->count; |
balrog | 0264592 | 2007-11-03 12:50:46 +0000 | [diff] [blame] | 395 | omap_i2c_fifo_run(s); |
balrog | 2988547 | 2008-02-10 17:02:23 +0000 | [diff] [blame] | 396 | } |
balrog | 0264592 | 2007-11-03 12:50:46 +0000 | [diff] [blame] | 397 | omap_i2c_interrupts_update(s); |
| 398 | } |
| 399 | break; |
| 400 | |
| 401 | case 0x28: /* I2C_OA */ |
| 402 | s->addr[0] = value & 0x3ff; |
| 403 | i2c_set_slave_address(&s->slave, value & 0x7f); |
| 404 | break; |
| 405 | |
| 406 | case 0x2c: /* I2C_SA */ |
| 407 | s->addr[1] = value & 0x3ff; |
| 408 | break; |
| 409 | |
| 410 | case 0x30: /* I2C_PSC */ |
| 411 | s->divider = value; |
| 412 | break; |
| 413 | |
| 414 | case 0x34: /* I2C_SCLL */ |
| 415 | s->times[0] = value; |
| 416 | break; |
| 417 | |
| 418 | case 0x38: /* I2C_SCLH */ |
| 419 | s->times[1] = value; |
| 420 | break; |
| 421 | |
| 422 | case 0x3c: /* I2C_SYSTEST */ |
balrog | 2988547 | 2008-02-10 17:02:23 +0000 | [diff] [blame] | 423 | s->test = value & 0xf80f; |
| 424 | if (value & (1 << 11)) /* SBB */ |
| 425 | if (s->revision >= OMAP2_INTR_REV) { |
| 426 | s->stat |= 0x3f; |
| 427 | omap_i2c_interrupts_update(s); |
| 428 | } |
balrog | 0264592 | 2007-11-03 12:50:46 +0000 | [diff] [blame] | 429 | if (value & (1 << 15)) /* ST_EN */ |
| 430 | printf("%s: System Test not supported\n", __FUNCTION__); |
| 431 | break; |
| 432 | |
| 433 | default: |
| 434 | OMAP_BAD_REG(addr); |
| 435 | return; |
| 436 | } |
| 437 | } |
| 438 | |
balrog | 2988547 | 2008-02-10 17:02:23 +0000 | [diff] [blame] | 439 | static void omap_i2c_writeb(void *opaque, target_phys_addr_t addr, |
| 440 | uint32_t value) |
| 441 | { |
| 442 | struct omap_i2c_s *s = (struct omap_i2c_s *) opaque; |
| 443 | int offset = addr & OMAP_MPUI_REG_MASK; |
| 444 | |
| 445 | switch (offset) { |
| 446 | case 0x1c: /* I2C_DATA */ |
| 447 | if (s->txlen > 2) { |
| 448 | /* XXX: remote access (qualifier) error - what's that? */ |
| 449 | break; |
| 450 | } |
| 451 | s->fifo <<= 8; |
| 452 | s->txlen += 1; |
| 453 | s->fifo |= value & 0xff; |
| 454 | s->stat &= ~(1 << 10); /* XUDF */ |
| 455 | if (s->txlen > 2) |
| 456 | s->stat &= ~(1 << 4); /* XRDY */ |
| 457 | omap_i2c_fifo_run(s); |
| 458 | omap_i2c_interrupts_update(s); |
| 459 | break; |
| 460 | |
| 461 | default: |
| 462 | OMAP_BAD_REG(addr); |
| 463 | return; |
| 464 | } |
| 465 | } |
| 466 | |
balrog | 0264592 | 2007-11-03 12:50:46 +0000 | [diff] [blame] | 467 | static CPUReadMemoryFunc *omap_i2c_readfn[] = { |
| 468 | omap_badwidth_read16, |
| 469 | omap_i2c_read, |
| 470 | omap_badwidth_read16, |
| 471 | }; |
| 472 | |
| 473 | static CPUWriteMemoryFunc *omap_i2c_writefn[] = { |
balrog | 2988547 | 2008-02-10 17:02:23 +0000 | [diff] [blame] | 474 | omap_i2c_writeb, /* Only the last fifo write can be 8 bit. */ |
balrog | 0264592 | 2007-11-03 12:50:46 +0000 | [diff] [blame] | 475 | omap_i2c_write, |
balrog | 2988547 | 2008-02-10 17:02:23 +0000 | [diff] [blame] | 476 | omap_badwidth_write16, |
balrog | 0264592 | 2007-11-03 12:50:46 +0000 | [diff] [blame] | 477 | }; |
| 478 | |
| 479 | struct omap_i2c_s *omap_i2c_init(target_phys_addr_t base, |
| 480 | qemu_irq irq, qemu_irq *dma, omap_clk clk) |
| 481 | { |
| 482 | int iomemtype; |
| 483 | struct omap_i2c_s *s = (struct omap_i2c_s *) |
| 484 | qemu_mallocz(sizeof(struct omap_i2c_s)); |
| 485 | |
balrog | 2988547 | 2008-02-10 17:02:23 +0000 | [diff] [blame] | 486 | /* TODO: set a value greater or equal to real hardware */ |
| 487 | s->revision = 0x11; |
balrog | 0264592 | 2007-11-03 12:50:46 +0000 | [diff] [blame] | 488 | s->base = base; |
| 489 | s->irq = irq; |
| 490 | s->drq[0] = dma[0]; |
| 491 | s->drq[1] = dma[1]; |
| 492 | s->slave.event = omap_i2c_event; |
| 493 | s->slave.recv = omap_i2c_rx; |
| 494 | s->slave.send = omap_i2c_tx; |
| 495 | s->bus = i2c_init_bus(); |
| 496 | omap_i2c_reset(s); |
| 497 | |
| 498 | iomemtype = cpu_register_io_memory(0, omap_i2c_readfn, |
| 499 | omap_i2c_writefn, s); |
| 500 | cpu_register_physical_memory(s->base, 0x800, iomemtype); |
| 501 | |
| 502 | return s; |
| 503 | } |
| 504 | |
balrog | 2988547 | 2008-02-10 17:02:23 +0000 | [diff] [blame] | 505 | struct omap_i2c_s *omap2_i2c_init(struct omap_target_agent_s *ta, |
| 506 | qemu_irq irq, qemu_irq *dma, omap_clk fclk, omap_clk iclk) |
| 507 | { |
| 508 | int iomemtype; |
| 509 | struct omap_i2c_s *s = (struct omap_i2c_s *) |
| 510 | qemu_mallocz(sizeof(struct omap_i2c_s)); |
| 511 | |
| 512 | s->revision = 0x34; |
| 513 | s->irq = irq; |
| 514 | s->drq[0] = dma[0]; |
| 515 | s->drq[1] = dma[1]; |
| 516 | s->slave.event = omap_i2c_event; |
| 517 | s->slave.recv = omap_i2c_rx; |
| 518 | s->slave.send = omap_i2c_tx; |
| 519 | s->bus = i2c_init_bus(); |
| 520 | omap_i2c_reset(s); |
| 521 | |
| 522 | iomemtype = cpu_register_io_memory(0, omap_i2c_readfn, |
| 523 | omap_i2c_writefn, s); |
| 524 | s->base = omap_l4_attach(ta, 0, iomemtype); |
| 525 | |
| 526 | return s; |
| 527 | } |
| 528 | |
balrog | 0264592 | 2007-11-03 12:50:46 +0000 | [diff] [blame] | 529 | i2c_bus *omap_i2c_bus(struct omap_i2c_s *s) |
| 530 | { |
| 531 | return s->bus; |
| 532 | } |