ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 1 | /* |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 2 | * Arm PrimeCell PL181 MultiMedia Card Interface |
| 3 | * |
| 4 | * Copyright (c) 2007 CodeSourcery. |
| 5 | * Written by Paul Brook |
| 6 | * |
Matthew Fernandez | 8e31bf3 | 2011-06-26 12:21:35 +1000 | [diff] [blame] | 7 | * This code is licensed under the GPL. |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 8 | */ |
| 9 | |
Markus Armbruster | 1383997 | 2011-01-28 11:21:37 +0100 | [diff] [blame] | 10 | #include "blockdev.h" |
Paul Brook | aa9311d | 2009-05-14 22:35:07 +0100 | [diff] [blame] | 11 | #include "sysbus.h" |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 12 | #include "sd.h" |
| 13 | |
| 14 | //#define DEBUG_PL181 1 |
| 15 | |
| 16 | #ifdef DEBUG_PL181 |
Blue Swirl | 001faf3 | 2009-05-13 17:53:17 +0000 | [diff] [blame] | 17 | #define DPRINTF(fmt, ...) \ |
| 18 | do { printf("pl181: " fmt , ## __VA_ARGS__); } while (0) |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 19 | #else |
Blue Swirl | 001faf3 | 2009-05-13 17:53:17 +0000 | [diff] [blame] | 20 | #define DPRINTF(fmt, ...) do {} while(0) |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 21 | #endif |
| 22 | |
| 23 | #define PL181_FIFO_LEN 16 |
| 24 | |
| 25 | typedef struct { |
Paul Brook | aa9311d | 2009-05-14 22:35:07 +0100 | [diff] [blame] | 26 | SysBusDevice busdev; |
pbrook | 42a1089 | 2007-04-06 16:54:11 +0000 | [diff] [blame] | 27 | SDState *card; |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 28 | uint32_t clock; |
| 29 | uint32_t power; |
| 30 | uint32_t cmdarg; |
| 31 | uint32_t cmd; |
| 32 | uint32_t datatimer; |
| 33 | uint32_t datalength; |
| 34 | uint32_t respcmd; |
| 35 | uint32_t response[4]; |
| 36 | uint32_t datactrl; |
| 37 | uint32_t datacnt; |
| 38 | uint32_t status; |
| 39 | uint32_t mask[2]; |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 40 | int fifo_pos; |
| 41 | int fifo_len; |
pbrook | 6361cdb | 2007-06-09 14:07:54 +0000 | [diff] [blame] | 42 | /* The linux 2.6.21 driver is buggy, and misbehaves if new data arrives |
| 43 | while it is reading the FIFO. We hack around this be defering |
| 44 | subsequent transfers until after the driver polls the status word. |
| 45 | http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=4446/1 |
| 46 | */ |
| 47 | int linux_hack; |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 48 | uint32_t fifo[PL181_FIFO_LEN]; |
pbrook | d537cf6 | 2007-04-07 18:14:41 +0000 | [diff] [blame] | 49 | qemu_irq irq[2]; |
Peter Maydell | c31a472 | 2011-02-21 20:57:49 +0000 | [diff] [blame] | 50 | /* GPIO outputs for 'card is readonly' and 'card inserted' */ |
| 51 | qemu_irq cardstatus[2]; |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 52 | } pl181_state; |
| 53 | |
| 54 | #define PL181_CMD_INDEX 0x3f |
| 55 | #define PL181_CMD_RESPONSE (1 << 6) |
| 56 | #define PL181_CMD_LONGRESP (1 << 7) |
| 57 | #define PL181_CMD_INTERRUPT (1 << 8) |
| 58 | #define PL181_CMD_PENDING (1 << 9) |
| 59 | #define PL181_CMD_ENABLE (1 << 10) |
| 60 | |
| 61 | #define PL181_DATA_ENABLE (1 << 0) |
| 62 | #define PL181_DATA_DIRECTION (1 << 1) |
| 63 | #define PL181_DATA_MODE (1 << 2) |
| 64 | #define PL181_DATA_DMAENABLE (1 << 3) |
| 65 | |
| 66 | #define PL181_STATUS_CMDCRCFAIL (1 << 0) |
| 67 | #define PL181_STATUS_DATACRCFAIL (1 << 1) |
| 68 | #define PL181_STATUS_CMDTIMEOUT (1 << 2) |
| 69 | #define PL181_STATUS_DATATIMEOUT (1 << 3) |
| 70 | #define PL181_STATUS_TXUNDERRUN (1 << 4) |
| 71 | #define PL181_STATUS_RXOVERRUN (1 << 5) |
| 72 | #define PL181_STATUS_CMDRESPEND (1 << 6) |
| 73 | #define PL181_STATUS_CMDSENT (1 << 7) |
| 74 | #define PL181_STATUS_DATAEND (1 << 8) |
| 75 | #define PL181_STATUS_DATABLOCKEND (1 << 10) |
| 76 | #define PL181_STATUS_CMDACTIVE (1 << 11) |
| 77 | #define PL181_STATUS_TXACTIVE (1 << 12) |
| 78 | #define PL181_STATUS_RXACTIVE (1 << 13) |
| 79 | #define PL181_STATUS_TXFIFOHALFEMPTY (1 << 14) |
| 80 | #define PL181_STATUS_RXFIFOHALFFULL (1 << 15) |
| 81 | #define PL181_STATUS_TXFIFOFULL (1 << 16) |
| 82 | #define PL181_STATUS_RXFIFOFULL (1 << 17) |
| 83 | #define PL181_STATUS_TXFIFOEMPTY (1 << 18) |
| 84 | #define PL181_STATUS_RXFIFOEMPTY (1 << 19) |
| 85 | #define PL181_STATUS_TXDATAAVLBL (1 << 20) |
| 86 | #define PL181_STATUS_RXDATAAVLBL (1 << 21) |
| 87 | |
| 88 | #define PL181_STATUS_TX_FIFO (PL181_STATUS_TXACTIVE \ |
| 89 | |PL181_STATUS_TXFIFOHALFEMPTY \ |
| 90 | |PL181_STATUS_TXFIFOFULL \ |
| 91 | |PL181_STATUS_TXFIFOEMPTY \ |
| 92 | |PL181_STATUS_TXDATAAVLBL) |
| 93 | #define PL181_STATUS_RX_FIFO (PL181_STATUS_RXACTIVE \ |
| 94 | |PL181_STATUS_RXFIFOHALFFULL \ |
| 95 | |PL181_STATUS_RXFIFOFULL \ |
| 96 | |PL181_STATUS_RXFIFOEMPTY \ |
| 97 | |PL181_STATUS_RXDATAAVLBL) |
| 98 | |
| 99 | static const unsigned char pl181_id[] = |
| 100 | { 0x81, 0x11, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 }; |
| 101 | |
| 102 | static void pl181_update(pl181_state *s) |
| 103 | { |
| 104 | int i; |
| 105 | for (i = 0; i < 2; i++) { |
pbrook | d537cf6 | 2007-04-07 18:14:41 +0000 | [diff] [blame] | 106 | qemu_set_irq(s->irq[i], (s->status & s->mask[i]) != 0); |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 107 | } |
| 108 | } |
| 109 | |
| 110 | static void pl181_fifo_push(pl181_state *s, uint32_t value) |
| 111 | { |
| 112 | int n; |
| 113 | |
| 114 | if (s->fifo_len == PL181_FIFO_LEN) { |
| 115 | fprintf(stderr, "pl181: FIFO overflow\n"); |
| 116 | return; |
| 117 | } |
| 118 | n = (s->fifo_pos + s->fifo_len) & (PL181_FIFO_LEN - 1); |
| 119 | s->fifo_len++; |
| 120 | s->fifo[n] = value; |
| 121 | DPRINTF("FIFO push %08x\n", (int)value); |
| 122 | } |
| 123 | |
| 124 | static uint32_t pl181_fifo_pop(pl181_state *s) |
| 125 | { |
| 126 | uint32_t value; |
| 127 | |
| 128 | if (s->fifo_len == 0) { |
| 129 | fprintf(stderr, "pl181: FIFO underflow\n"); |
| 130 | return 0; |
| 131 | } |
| 132 | value = s->fifo[s->fifo_pos]; |
| 133 | s->fifo_len--; |
| 134 | s->fifo_pos = (s->fifo_pos + 1) & (PL181_FIFO_LEN - 1); |
| 135 | DPRINTF("FIFO pop %08x\n", (int)value); |
| 136 | return value; |
| 137 | } |
| 138 | |
| 139 | static void pl181_send_command(pl181_state *s) |
| 140 | { |
Paul Brook | bc24a22 | 2009-05-10 01:44:56 +0100 | [diff] [blame] | 141 | SDRequest request; |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 142 | uint8_t response[16]; |
| 143 | int rlen; |
| 144 | |
| 145 | request.cmd = s->cmd & PL181_CMD_INDEX; |
| 146 | request.arg = s->cmdarg; |
| 147 | DPRINTF("Command %d %08x\n", request.cmd, request.arg); |
| 148 | rlen = sd_do_command(s->card, &request, response); |
| 149 | if (rlen < 0) |
| 150 | goto error; |
| 151 | if (s->cmd & PL181_CMD_RESPONSE) { |
| 152 | #define RWORD(n) ((response[n] << 24) | (response[n + 1] << 16) \ |
| 153 | | (response[n + 2] << 8) | response[n + 3]) |
| 154 | if (rlen == 0 || (rlen == 4 && (s->cmd & PL181_CMD_LONGRESP))) |
| 155 | goto error; |
| 156 | if (rlen != 4 && rlen != 16) |
| 157 | goto error; |
| 158 | s->response[0] = RWORD(0); |
| 159 | if (rlen == 4) { |
| 160 | s->response[1] = s->response[2] = s->response[3] = 0; |
| 161 | } else { |
| 162 | s->response[1] = RWORD(4); |
| 163 | s->response[2] = RWORD(8); |
| 164 | s->response[3] = RWORD(12) & ~1; |
| 165 | } |
ths | aa1f17c | 2007-07-11 22:48:58 +0000 | [diff] [blame] | 166 | DPRINTF("Response received\n"); |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 167 | s->status |= PL181_STATUS_CMDRESPEND; |
| 168 | #undef RWORD |
| 169 | } else { |
| 170 | DPRINTF("Command sent\n"); |
| 171 | s->status |= PL181_STATUS_CMDSENT; |
| 172 | } |
| 173 | return; |
| 174 | |
| 175 | error: |
| 176 | DPRINTF("Timeout\n"); |
| 177 | s->status |= PL181_STATUS_CMDTIMEOUT; |
| 178 | } |
| 179 | |
ths | aa1f17c | 2007-07-11 22:48:58 +0000 | [diff] [blame] | 180 | /* Transfer data between the card and the FIFO. This is complicated by |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 181 | the FIFO holding 32-bit words and the card taking data in single byte |
| 182 | chunks. FIFO bytes are transferred in little-endian order. */ |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 183 | |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 184 | static void pl181_fifo_run(pl181_state *s) |
| 185 | { |
| 186 | uint32_t bits; |
Blue Swirl | f21126d | 2010-02-22 20:42:51 +0000 | [diff] [blame] | 187 | uint32_t value = 0; |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 188 | int n; |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 189 | int is_read; |
| 190 | |
| 191 | is_read = (s->datactrl & PL181_DATA_DIRECTION) != 0; |
pbrook | 6361cdb | 2007-06-09 14:07:54 +0000 | [diff] [blame] | 192 | if (s->datacnt != 0 && (!is_read || sd_data_ready(s->card)) |
| 193 | && !s->linux_hack) { |
Paul Brook | bc3b26f | 2010-02-22 15:33:59 +0000 | [diff] [blame] | 194 | if (is_read) { |
| 195 | n = 0; |
Paul Brook | bc3b26f | 2010-02-22 15:33:59 +0000 | [diff] [blame] | 196 | while (s->datacnt && s->fifo_len < PL181_FIFO_LEN) { |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 197 | value |= (uint32_t)sd_read_data(s->card) << (n * 8); |
Paul Brook | bc3b26f | 2010-02-22 15:33:59 +0000 | [diff] [blame] | 198 | s->datacnt--; |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 199 | n++; |
| 200 | if (n == 4) { |
| 201 | pl181_fifo_push(s, value); |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 202 | n = 0; |
Paul Brook | bc3b26f | 2010-02-22 15:33:59 +0000 | [diff] [blame] | 203 | value = 0; |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 204 | } |
Paul Brook | bc3b26f | 2010-02-22 15:33:59 +0000 | [diff] [blame] | 205 | } |
| 206 | if (n != 0) { |
| 207 | pl181_fifo_push(s, value); |
| 208 | } |
| 209 | } else { /* write */ |
| 210 | n = 0; |
| 211 | while (s->datacnt > 0 && (s->fifo_len > 0 || n > 0)) { |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 212 | if (n == 0) { |
| 213 | value = pl181_fifo_pop(s); |
| 214 | n = 4; |
| 215 | } |
Paul Brook | bc3b26f | 2010-02-22 15:33:59 +0000 | [diff] [blame] | 216 | n--; |
| 217 | s->datacnt--; |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 218 | sd_write_data(s->card, value & 0xff); |
| 219 | value >>= 8; |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 220 | } |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 221 | } |
| 222 | } |
| 223 | s->status &= ~(PL181_STATUS_RX_FIFO | PL181_STATUS_TX_FIFO); |
| 224 | if (s->datacnt == 0) { |
| 225 | s->status |= PL181_STATUS_DATAEND; |
| 226 | /* HACK: */ |
| 227 | s->status |= PL181_STATUS_DATABLOCKEND; |
| 228 | DPRINTF("Transfer Complete\n"); |
| 229 | } |
pbrook | 6361cdb | 2007-06-09 14:07:54 +0000 | [diff] [blame] | 230 | if (s->datacnt == 0 && s->fifo_len == 0) { |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 231 | s->datactrl &= ~PL181_DATA_ENABLE; |
| 232 | DPRINTF("Data engine idle\n"); |
| 233 | } else { |
| 234 | /* Update FIFO bits. */ |
| 235 | bits = PL181_STATUS_TXACTIVE | PL181_STATUS_RXACTIVE; |
| 236 | if (s->fifo_len == 0) { |
| 237 | bits |= PL181_STATUS_TXFIFOEMPTY; |
| 238 | bits |= PL181_STATUS_RXFIFOEMPTY; |
| 239 | } else { |
| 240 | bits |= PL181_STATUS_TXDATAAVLBL; |
| 241 | bits |= PL181_STATUS_RXDATAAVLBL; |
| 242 | } |
| 243 | if (s->fifo_len == 16) { |
| 244 | bits |= PL181_STATUS_TXFIFOFULL; |
| 245 | bits |= PL181_STATUS_RXFIFOFULL; |
| 246 | } |
| 247 | if (s->fifo_len <= 8) { |
| 248 | bits |= PL181_STATUS_TXFIFOHALFEMPTY; |
| 249 | } |
| 250 | if (s->fifo_len >= 8) { |
| 251 | bits |= PL181_STATUS_RXFIFOHALFFULL; |
| 252 | } |
| 253 | if (s->datactrl & PL181_DATA_DIRECTION) { |
| 254 | bits &= PL181_STATUS_RX_FIFO; |
| 255 | } else { |
| 256 | bits &= PL181_STATUS_TX_FIFO; |
| 257 | } |
| 258 | s->status |= bits; |
| 259 | } |
| 260 | } |
| 261 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 262 | static uint32_t pl181_read(void *opaque, target_phys_addr_t offset) |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 263 | { |
| 264 | pl181_state *s = (pl181_state *)opaque; |
pbrook | 6361cdb | 2007-06-09 14:07:54 +0000 | [diff] [blame] | 265 | uint32_t tmp; |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 266 | |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 267 | if (offset >= 0xfe0 && offset < 0x1000) { |
| 268 | return pl181_id[(offset - 0xfe0) >> 2]; |
| 269 | } |
| 270 | switch (offset) { |
| 271 | case 0x00: /* Power */ |
| 272 | return s->power; |
| 273 | case 0x04: /* Clock */ |
| 274 | return s->clock; |
| 275 | case 0x08: /* Argument */ |
| 276 | return s->cmdarg; |
| 277 | case 0x0c: /* Command */ |
| 278 | return s->cmd; |
| 279 | case 0x10: /* RespCmd */ |
| 280 | return s->respcmd; |
| 281 | case 0x14: /* Response0 */ |
| 282 | return s->response[0]; |
| 283 | case 0x18: /* Response1 */ |
| 284 | return s->response[1]; |
| 285 | case 0x1c: /* Response2 */ |
| 286 | return s->response[2]; |
| 287 | case 0x20: /* Response3 */ |
| 288 | return s->response[3]; |
| 289 | case 0x24: /* DataTimer */ |
| 290 | return s->datatimer; |
| 291 | case 0x28: /* DataLength */ |
| 292 | return s->datalength; |
| 293 | case 0x2c: /* DataCtrl */ |
| 294 | return s->datactrl; |
| 295 | case 0x30: /* DataCnt */ |
| 296 | return s->datacnt; |
| 297 | case 0x34: /* Status */ |
pbrook | 6361cdb | 2007-06-09 14:07:54 +0000 | [diff] [blame] | 298 | tmp = s->status; |
| 299 | if (s->linux_hack) { |
| 300 | s->linux_hack = 0; |
| 301 | pl181_fifo_run(s); |
| 302 | pl181_update(s); |
| 303 | } |
| 304 | return tmp; |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 305 | case 0x3c: /* Mask0 */ |
| 306 | return s->mask[0]; |
| 307 | case 0x40: /* Mask1 */ |
| 308 | return s->mask[1]; |
| 309 | case 0x48: /* FifoCnt */ |
pbrook | 6361cdb | 2007-06-09 14:07:54 +0000 | [diff] [blame] | 310 | /* The documentation is somewhat vague about exactly what FifoCnt |
| 311 | does. On real hardware it appears to be when decrememnted |
| 312 | when a word is transfered between the FIFO and the serial |
| 313 | data engine. DataCnt is decremented after each byte is |
| 314 | transfered between the serial engine and the card. |
| 315 | We don't emulate this level of detail, so both can be the same. */ |
| 316 | tmp = (s->datacnt + 3) >> 2; |
| 317 | if (s->linux_hack) { |
| 318 | s->linux_hack = 0; |
| 319 | pl181_fifo_run(s); |
| 320 | pl181_update(s); |
| 321 | } |
| 322 | return tmp; |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 323 | case 0x80: case 0x84: case 0x88: case 0x8c: /* FifoData */ |
| 324 | case 0x90: case 0x94: case 0x98: case 0x9c: |
| 325 | case 0xa0: case 0xa4: case 0xa8: case 0xac: |
| 326 | case 0xb0: case 0xb4: case 0xb8: case 0xbc: |
pbrook | 6361cdb | 2007-06-09 14:07:54 +0000 | [diff] [blame] | 327 | if (s->fifo_len == 0) { |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 328 | fprintf(stderr, "pl181: Unexpected FIFO read\n"); |
| 329 | return 0; |
| 330 | } else { |
| 331 | uint32_t value; |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 332 | value = pl181_fifo_pop(s); |
pbrook | 6361cdb | 2007-06-09 14:07:54 +0000 | [diff] [blame] | 333 | s->linux_hack = 1; |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 334 | pl181_fifo_run(s); |
| 335 | pl181_update(s); |
| 336 | return value; |
| 337 | } |
| 338 | default: |
Paul Brook | 2ac7117 | 2009-05-08 02:35:15 +0100 | [diff] [blame] | 339 | hw_error("pl181_read: Bad offset %x\n", (int)offset); |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 340 | return 0; |
| 341 | } |
| 342 | } |
| 343 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 344 | static void pl181_write(void *opaque, target_phys_addr_t offset, |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 345 | uint32_t value) |
| 346 | { |
| 347 | pl181_state *s = (pl181_state *)opaque; |
| 348 | |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 349 | switch (offset) { |
| 350 | case 0x00: /* Power */ |
| 351 | s->power = value & 0xff; |
| 352 | break; |
| 353 | case 0x04: /* Clock */ |
| 354 | s->clock = value & 0xff; |
| 355 | break; |
| 356 | case 0x08: /* Argument */ |
| 357 | s->cmdarg = value; |
| 358 | break; |
| 359 | case 0x0c: /* Command */ |
| 360 | s->cmd = value; |
| 361 | if (s->cmd & PL181_CMD_ENABLE) { |
| 362 | if (s->cmd & PL181_CMD_INTERRUPT) { |
| 363 | fprintf(stderr, "pl181: Interrupt mode not implemented\n"); |
| 364 | abort(); |
| 365 | } if (s->cmd & PL181_CMD_PENDING) { |
| 366 | fprintf(stderr, "pl181: Pending commands not implemented\n"); |
| 367 | abort(); |
| 368 | } else { |
| 369 | pl181_send_command(s); |
| 370 | pl181_fifo_run(s); |
| 371 | } |
| 372 | /* The command has completed one way or the other. */ |
| 373 | s->cmd &= ~PL181_CMD_ENABLE; |
| 374 | } |
| 375 | break; |
| 376 | case 0x24: /* DataTimer */ |
| 377 | s->datatimer = value; |
| 378 | break; |
| 379 | case 0x28: /* DataLength */ |
| 380 | s->datalength = value & 0xffff; |
| 381 | break; |
| 382 | case 0x2c: /* DataCtrl */ |
| 383 | s->datactrl = value & 0xff; |
| 384 | if (value & PL181_DATA_ENABLE) { |
| 385 | s->datacnt = s->datalength; |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 386 | pl181_fifo_run(s); |
| 387 | } |
| 388 | break; |
| 389 | case 0x38: /* Clear */ |
| 390 | s->status &= ~(value & 0x7ff); |
| 391 | break; |
| 392 | case 0x3c: /* Mask0 */ |
| 393 | s->mask[0] = value; |
| 394 | break; |
| 395 | case 0x40: /* Mask1 */ |
| 396 | s->mask[1] = value; |
| 397 | break; |
| 398 | case 0x80: case 0x84: case 0x88: case 0x8c: /* FifoData */ |
| 399 | case 0x90: case 0x94: case 0x98: case 0x9c: |
| 400 | case 0xa0: case 0xa4: case 0xa8: case 0xac: |
| 401 | case 0xb0: case 0xb4: case 0xb8: case 0xbc: |
pbrook | 6361cdb | 2007-06-09 14:07:54 +0000 | [diff] [blame] | 402 | if (s->datacnt == 0) { |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 403 | fprintf(stderr, "pl181: Unexpected FIFO write\n"); |
| 404 | } else { |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 405 | pl181_fifo_push(s, value); |
| 406 | pl181_fifo_run(s); |
| 407 | } |
| 408 | break; |
| 409 | default: |
Paul Brook | 2ac7117 | 2009-05-08 02:35:15 +0100 | [diff] [blame] | 410 | hw_error("pl181_write: Bad offset %x\n", (int)offset); |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 411 | } |
| 412 | pl181_update(s); |
| 413 | } |
| 414 | |
Blue Swirl | d60efc6 | 2009-08-25 18:29:31 +0000 | [diff] [blame] | 415 | static CPUReadMemoryFunc * const pl181_readfn[] = { |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 416 | pl181_read, |
| 417 | pl181_read, |
| 418 | pl181_read |
| 419 | }; |
| 420 | |
Blue Swirl | d60efc6 | 2009-08-25 18:29:31 +0000 | [diff] [blame] | 421 | static CPUWriteMemoryFunc * const pl181_writefn[] = { |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 422 | pl181_write, |
| 423 | pl181_write, |
| 424 | pl181_write |
| 425 | }; |
| 426 | |
| 427 | static void pl181_reset(void *opaque) |
| 428 | { |
| 429 | pl181_state *s = (pl181_state *)opaque; |
| 430 | |
| 431 | s->power = 0; |
| 432 | s->cmdarg = 0; |
| 433 | s->cmd = 0; |
| 434 | s->datatimer = 0; |
| 435 | s->datalength = 0; |
| 436 | s->respcmd = 0; |
| 437 | s->response[0] = 0; |
| 438 | s->response[1] = 0; |
| 439 | s->response[2] = 0; |
| 440 | s->response[3] = 0; |
| 441 | s->datatimer = 0; |
| 442 | s->datalength = 0; |
| 443 | s->datactrl = 0; |
| 444 | s->datacnt = 0; |
| 445 | s->status = 0; |
pbrook | 6361cdb | 2007-06-09 14:07:54 +0000 | [diff] [blame] | 446 | s->linux_hack = 0; |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 447 | s->mask[0] = 0; |
| 448 | s->mask[1] = 0; |
Peter Maydell | c31a472 | 2011-02-21 20:57:49 +0000 | [diff] [blame] | 449 | |
| 450 | /* We can assume our GPIO outputs have been wired up now */ |
| 451 | sd_set_cb(s->card, s->cardstatus[0], s->cardstatus[1]); |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 452 | } |
| 453 | |
Gerd Hoffmann | 81a322d | 2009-08-14 10:36:05 +0200 | [diff] [blame] | 454 | static int pl181_init(SysBusDevice *dev) |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 455 | { |
| 456 | int iomemtype; |
Paul Brook | aa9311d | 2009-05-14 22:35:07 +0100 | [diff] [blame] | 457 | pl181_state *s = FROM_SYSBUS(pl181_state, dev); |
Markus Armbruster | 1383997 | 2011-01-28 11:21:37 +0100 | [diff] [blame] | 458 | DriveInfo *dinfo; |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 459 | |
Alexander Graf | 2507c12 | 2010-12-08 12:05:37 +0100 | [diff] [blame] | 460 | iomemtype = cpu_register_io_memory(pl181_readfn, pl181_writefn, s, |
| 461 | DEVICE_NATIVE_ENDIAN); |
Paul Brook | aa9311d | 2009-05-14 22:35:07 +0100 | [diff] [blame] | 462 | sysbus_init_mmio(dev, 0x1000, iomemtype); |
| 463 | sysbus_init_irq(dev, &s->irq[0]); |
| 464 | sysbus_init_irq(dev, &s->irq[1]); |
Peter Maydell | c31a472 | 2011-02-21 20:57:49 +0000 | [diff] [blame] | 465 | qdev_init_gpio_out(&s->busdev.qdev, s->cardstatus, 2); |
Markus Armbruster | 1383997 | 2011-01-28 11:21:37 +0100 | [diff] [blame] | 466 | dinfo = drive_get_next(IF_SD); |
| 467 | s->card = sd_init(dinfo ? dinfo->bdrv : NULL, 0); |
Jan Kiszka | a08d436 | 2009-06-27 09:25:07 +0200 | [diff] [blame] | 468 | qemu_register_reset(pl181_reset, s); |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 469 | pl181_reset(s); |
| 470 | /* ??? Save/restore. */ |
Gerd Hoffmann | 81a322d | 2009-08-14 10:36:05 +0200 | [diff] [blame] | 471 | return 0; |
pbrook | a1bb27b | 2007-04-06 16:49:48 +0000 | [diff] [blame] | 472 | } |
Paul Brook | aa9311d | 2009-05-14 22:35:07 +0100 | [diff] [blame] | 473 | |
| 474 | static void pl181_register_devices(void) |
| 475 | { |
| 476 | sysbus_register_dev("pl181", sizeof(pl181_state), pl181_init); |
| 477 | } |
| 478 | |
| 479 | device_init(pl181_register_devices) |