4 * Copyright (c) 2005-2006 Fabrice Bellard
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
30 #define DPRINTF(fmt, args...) \
31 do { printf("ESP: " fmt , ##args); } while (0)
32 #define pic_set_irq(irq, level) \
33 do { printf("ESP: set_irq(%d): %d\n", (irq), (level)); pic_set_irq((irq),(level));} while (0)
35 #define DPRINTF(fmt, args...)
39 #define ESPDMA_MAXADDR (ESPDMA_REGS * 4 - 1)
40 #define ESP_MAXREG 0x3f
42 #define DMA_VER 0xa0000000
44 #define DMA_INTREN 0x10
45 #define DMA_WRITE_MEM 0x100
46 #define DMA_LOADED 0x04000000
47 typedef struct ESPState ESPState;
50 BlockDriverState **bd;
51 uint8_t rregs[ESP_MAXREG];
52 uint8_t wregs[ESP_MAXREG];
54 uint32_t espdmaregs[ESPDMA_REGS];
56 uint32_t ti_rptr, ti_wptr;
57 uint8_t ti_buf[TI_BUFSZ];
60 SCSIDevice *scsi_dev[MAX_DISKS];
61 SCSIDevice *current_dev;
62 uint8_t cmdbuf[TI_BUFSZ];
91 static int get_cmd(ESPState *s, uint8_t *buf)
96 dmalen = s->wregs[0] | (s->wregs[1] << 8);
97 target = s->wregs[4] & 7;
98 DPRINTF("get_cmd: len %d target %d\n", dmalen, target);
100 DPRINTF("DMA Direction: %c, addr 0x%8.8x\n",
101 s->espdmaregs[0] & DMA_WRITE_MEM ? 'w': 'r', s->espdmaregs[1]);
102 sparc_iommu_memory_read(s->espdmaregs[1], buf, dmalen);
105 memcpy(&buf[1], s->ti_buf, dmalen);
113 if (s->current_dev) {
114 /* Started a new command before the old one finished. Cancel it. */
115 scsi_cancel_io(s->current_dev, 0);
119 if (target >= 4 || !s->scsi_dev[target]) {
121 s->rregs[4] = STAT_IN;
122 s->rregs[5] = INTR_DC;
124 s->espdmaregs[0] |= DMA_INTR;
125 pic_set_irq(s->irq, 1);
128 s->current_dev = s->scsi_dev[target];
132 static void do_cmd(ESPState *s, uint8_t *buf)
137 DPRINTF("do_cmd: busid 0x%x\n", buf[0]);
139 datalen = scsi_send_command(s->current_dev, 0, &buf[1], lun);
143 s->rregs[4] = STAT_IN | STAT_TC;
146 s->rregs[4] |= STAT_DI;
147 s->ti_size = datalen;
148 scsi_read_data(s->current_dev, 0);
150 s->rregs[4] |= STAT_DO;
151 s->ti_size = -datalen;
152 scsi_write_data(s->current_dev, 0);
155 s->rregs[5] = INTR_BS | INTR_FC;
156 s->rregs[6] = SEQ_CD;
157 s->espdmaregs[0] |= DMA_INTR;
158 pic_set_irq(s->irq, 1);
161 static void handle_satn(ESPState *s)
166 len = get_cmd(s, buf);
171 static void handle_satn_stop(ESPState *s)
173 s->cmdlen = get_cmd(s, s->cmdbuf);
175 DPRINTF("Set ATN & Stop: cmdlen %d\n", s->cmdlen);
177 s->espdmaregs[1] += s->cmdlen;
178 s->rregs[4] = STAT_IN | STAT_TC | STAT_CD;
179 s->rregs[5] = INTR_BS | INTR_FC;
180 s->rregs[6] = SEQ_CD;
181 s->espdmaregs[0] |= DMA_INTR;
182 pic_set_irq(s->irq, 1);
186 static void write_response(ESPState *s)
188 DPRINTF("Transfer status (sense=%d)\n", s->sense);
189 s->ti_buf[0] = s->sense;
192 DPRINTF("DMA Direction: %c\n",
193 s->espdmaregs[0] & DMA_WRITE_MEM ? 'w': 'r');
194 sparc_iommu_memory_write(s->espdmaregs[1], s->ti_buf, 2);
195 s->rregs[4] = STAT_IN | STAT_TC | STAT_ST;
196 s->rregs[5] = INTR_BS | INTR_FC;
197 s->rregs[6] = SEQ_CD;
204 s->espdmaregs[0] |= DMA_INTR;
205 pic_set_irq(s->irq, 1);
209 static void esp_dma_done(ESPState *s)
211 s->rregs[4] |= STAT_IN | STAT_TC;
212 s->rregs[5] = INTR_BS;
215 s->espdmaregs[0] |= DMA_INTR;
216 pic_set_irq(s->irq, 1);
219 static void esp_do_dma(ESPState *s)
224 to_device = (s->espdmaregs[0] & DMA_WRITE_MEM) == 0;
225 addr = s->espdmaregs[1];
227 DPRINTF("DMA address %08x len %08x\n", addr, len);
229 s->espdmaregs[1] += len;
231 DPRINTF("command len %d + %d\n", s->cmdlen, len);
232 sparc_iommu_memory_read(addr, &s->cmdbuf[s->cmdlen], len);
236 do_cmd(s, s->cmdbuf);
239 if (s->async_len == 0) {
240 /* Defer until data is available. */
243 if (len > s->async_len) {
247 sparc_iommu_memory_read(addr, s->async_buf, len);
249 sparc_iommu_memory_write(addr, s->async_buf, len);
255 s->espdmaregs[1] += len;
256 if (s->async_len == 0) {
258 scsi_write_data(s->current_dev, 0);
260 scsi_read_data(s->current_dev, 0);
263 if (s->dma_left == 0) {
268 static void esp_command_complete(void *opaque, int reason, uint32_t tag,
271 ESPState *s = (ESPState *)opaque;
273 if (reason == SCSI_REASON_DONE) {
274 DPRINTF("SCSI Command complete\n");
276 DPRINTF("SCSI command completed unexpectedly\n");
281 DPRINTF("Command failed\n");
283 s->rregs[4] = STAT_ST;
285 s->current_dev = NULL;
287 DPRINTF("transfer %d/%d\n", s->dma_left, s->ti_size);
289 s->async_buf = scsi_get_buf(s->current_dev, 0);
295 static void handle_ti(ESPState *s)
297 uint32_t dmalen, minlen;
299 dmalen = s->wregs[0] | (s->wregs[1] << 8);
305 minlen = (dmalen < 32) ? dmalen : 32;
307 minlen = (dmalen < s->ti_size) ? dmalen : s->ti_size;
308 DPRINTF("Transfer Information len %d\n", minlen);
310 s->dma_left = minlen;
311 s->rregs[4] &= ~STAT_TC;
313 } else if (s->do_cmd) {
314 DPRINTF("command len %d\n", s->cmdlen);
318 do_cmd(s, s->cmdbuf);
323 static void esp_reset(void *opaque)
325 ESPState *s = opaque;
326 memset(s->rregs, 0, ESP_MAXREG);
327 memset(s->wregs, 0, ESP_MAXREG);
328 s->rregs[0x0e] = 0x4; // Indicate fas100a
329 memset(s->espdmaregs, 0, ESPDMA_REGS * 4);
337 static uint32_t esp_mem_readb(void *opaque, target_phys_addr_t addr)
339 ESPState *s = opaque;
342 saddr = (addr & ESP_MAXREG) >> 2;
343 DPRINTF("read reg[%d]: 0x%2.2x\n", saddr, s->rregs[saddr]);
347 if (s->ti_size > 0) {
349 if ((s->rregs[4] & 6) == 0) {
351 fprintf(stderr, "esp: PIO data read not implemented\n");
354 s->rregs[2] = s->ti_buf[s->ti_rptr++];
356 pic_set_irq(s->irq, 1);
358 if (s->ti_size == 0) {
365 // Clear interrupt/error status bits
366 s->rregs[4] &= ~(STAT_IN | STAT_GE | STAT_PE);
367 pic_set_irq(s->irq, 0);
368 s->espdmaregs[0] &= ~DMA_INTR;
373 return s->rregs[saddr];
376 static void esp_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
378 ESPState *s = opaque;
381 saddr = (addr & ESP_MAXREG) >> 2;
382 DPRINTF("write reg[%d]: 0x%2.2x -> 0x%2.2x\n", saddr, s->wregs[saddr], val);
386 s->rregs[saddr] = val;
387 s->rregs[4] &= ~STAT_TC;
392 s->cmdbuf[s->cmdlen++] = val & 0xff;
393 } else if ((s->rregs[4] & 6) == 0) {
397 fprintf(stderr, "esp: PIO data write not implemented\n");
400 s->ti_buf[s->ti_wptr++] = val & 0xff;
404 s->rregs[saddr] = val;
413 DPRINTF("NOP (%2.2x)\n", val);
416 DPRINTF("Flush FIFO (%2.2x)\n", val);
418 s->rregs[5] = INTR_FC;
422 DPRINTF("Chip reset (%2.2x)\n", val);
426 DPRINTF("Bus reset (%2.2x)\n", val);
427 s->rregs[5] = INTR_RST;
428 if (!(s->wregs[8] & 0x40)) {
429 s->espdmaregs[0] |= DMA_INTR;
430 pic_set_irq(s->irq, 1);
437 DPRINTF("Initiator Command Complete Sequence (%2.2x)\n", val);
441 DPRINTF("Message Accepted (%2.2x)\n", val);
443 s->rregs[5] = INTR_DC;
447 DPRINTF("Set ATN (%2.2x)\n", val);
450 DPRINTF("Set ATN (%2.2x)\n", val);
454 DPRINTF("Set ATN & stop (%2.2x)\n", val);
458 DPRINTF("Unhandled ESP command (%2.2x)\n", val);
465 s->rregs[saddr] = val;
470 s->rregs[saddr] = val & 0x15;
473 s->rregs[saddr] = val;
478 s->wregs[saddr] = val;
481 static CPUReadMemoryFunc *esp_mem_read[3] = {
487 static CPUWriteMemoryFunc *esp_mem_write[3] = {
493 static uint32_t espdma_mem_readl(void *opaque, target_phys_addr_t addr)
495 ESPState *s = opaque;
498 saddr = (addr & ESPDMA_MAXADDR) >> 2;
499 DPRINTF("read dmareg[%d]: 0x%8.8x\n", saddr, s->espdmaregs[saddr]);
501 return s->espdmaregs[saddr];
504 static void espdma_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
506 ESPState *s = opaque;
509 saddr = (addr & ESPDMA_MAXADDR) >> 2;
510 DPRINTF("write dmareg[%d]: 0x%8.8x -> 0x%8.8x\n", saddr, s->espdmaregs[saddr], val);
513 if (!(val & DMA_INTREN))
514 pic_set_irq(s->irq, 0);
517 } else if (val & 0x40) {
525 s->espdmaregs[0] |= DMA_LOADED;
530 s->espdmaregs[saddr] = val;
533 static CPUReadMemoryFunc *espdma_mem_read[3] = {
539 static CPUWriteMemoryFunc *espdma_mem_write[3] = {
545 static void esp_save(QEMUFile *f, void *opaque)
547 ESPState *s = opaque;
550 qemu_put_buffer(f, s->rregs, ESP_MAXREG);
551 qemu_put_buffer(f, s->wregs, ESP_MAXREG);
552 qemu_put_be32s(f, &s->irq);
553 for (i = 0; i < ESPDMA_REGS; i++)
554 qemu_put_be32s(f, &s->espdmaregs[i]);
555 qemu_put_be32s(f, &s->ti_size);
556 qemu_put_be32s(f, &s->ti_rptr);
557 qemu_put_be32s(f, &s->ti_wptr);
558 qemu_put_buffer(f, s->ti_buf, TI_BUFSZ);
559 qemu_put_be32s(f, &s->dma);
562 static int esp_load(QEMUFile *f, void *opaque, int version_id)
564 ESPState *s = opaque;
570 qemu_get_buffer(f, s->rregs, ESP_MAXREG);
571 qemu_get_buffer(f, s->wregs, ESP_MAXREG);
572 qemu_get_be32s(f, &s->irq);
573 for (i = 0; i < ESPDMA_REGS; i++)
574 qemu_get_be32s(f, &s->espdmaregs[i]);
575 qemu_get_be32s(f, &s->ti_size);
576 qemu_get_be32s(f, &s->ti_rptr);
577 qemu_get_be32s(f, &s->ti_wptr);
578 qemu_get_buffer(f, s->ti_buf, TI_BUFSZ);
579 qemu_get_be32s(f, &s->dma);
584 void esp_init(BlockDriverState **bd, int irq, uint32_t espaddr, uint32_t espdaddr)
587 int esp_io_memory, espdma_io_memory;
590 s = qemu_mallocz(sizeof(ESPState));
597 esp_io_memory = cpu_register_io_memory(0, esp_mem_read, esp_mem_write, s);
598 cpu_register_physical_memory(espaddr, ESP_MAXREG*4, esp_io_memory);
600 espdma_io_memory = cpu_register_io_memory(0, espdma_mem_read, espdma_mem_write, s);
601 cpu_register_physical_memory(espdaddr, 16, espdma_io_memory);
605 register_savevm("esp", espaddr, 1, esp_save, esp_load, s);
606 qemu_register_reset(esp_reset, s);
607 for (i = 0; i < MAX_DISKS; i++) {
609 /* Command queueing is not implemented. */
611 scsi_disk_init(bs_table[i], 0, esp_command_complete, s);