/*
- * QEMU ESP emulation
- *
- * Copyright (c) 2005 Fabrice Bellard
- *
+ * QEMU ESP/NCR53C9x emulation
+ *
+ * Copyright (c) 2005-2006 Fabrice Bellard
+ *
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
-#include "vl.h"
+
+#include "sysbus.h"
+#include "scsi.h"
+#include "esp.h"
/* debug ESP card */
//#define DEBUG_ESP
+/*
+ * On Sparc32, this is the ESP (NCR53C90) part of chip STP2000 (Master I/O),
+ * also produced as NCR89C100. See
+ * http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR89C100.txt
+ * and
+ * http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR53C9X.txt
+ */
+
#ifdef DEBUG_ESP
-#define DPRINTF(fmt, args...) \
-do { printf("ESP: " fmt , ##args); } while (0)
+#define DPRINTF(fmt, ...) \
+ do { printf("ESP: " fmt , ## __VA_ARGS__); } while (0)
#else
-#define DPRINTF(fmt, args...)
+#define DPRINTF(fmt, ...) do {} while (0)
#endif
-#define ESPDMA_REGS 4
-#define ESPDMA_MAXADDR (ESPDMA_REGS * 4 - 1)
-#define ESP_MAXREG 0x3f
-#define TI_BUFSZ 65536
-#define DMA_VER 0xa0000000
-#define DMA_LOADED 0x04000000
-
-typedef struct ESPState {
- BlockDriverState **bd;
- uint8_t rregs[ESP_MAXREG];
- uint8_t wregs[ESP_MAXREG];
- int irq;
- uint32_t espdmaregs[ESPDMA_REGS];
- uint32_t ti_size;
+#define ESP_ERROR(fmt, ...) \
+ do { printf("ESP ERROR: %s: " fmt, __func__ , ## __VA_ARGS__); } while (0)
+
+#define ESP_REGS 16
+#define TI_BUFSZ 16
+
+typedef struct ESPState ESPState;
+
+struct ESPState {
+ SysBusDevice busdev;
+ uint32_t it_shift;
+ qemu_irq irq;
+ uint8_t rregs[ESP_REGS];
+ uint8_t wregs[ESP_REGS];
+ int32_t ti_size;
uint32_t ti_rptr, ti_wptr;
- int ti_dir;
uint8_t ti_buf[TI_BUFSZ];
- int dma;
-} ESPState;
+ uint32_t sense;
+ uint32_t dma;
+ SCSIBus bus;
+ SCSIDevice *current_dev;
+ uint8_t cmdbuf[TI_BUFSZ];
+ uint32_t cmdlen;
+ uint32_t do_cmd;
+
+ /* The amount of data left in the current DMA transfer. */
+ uint32_t dma_left;
+ /* The size of the current DMA transfer. Zero if no transfer is in
+ progress. */
+ uint32_t dma_counter;
+ uint8_t *async_buf;
+ uint32_t async_len;
+
+ ESPDMAMemoryReadWriteFunc dma_memory_read;
+ ESPDMAMemoryReadWriteFunc dma_memory_write;
+ void *dma_opaque;
+};
+
+#define ESP_TCLO 0x0
+#define ESP_TCMID 0x1
+#define ESP_FIFO 0x2
+#define ESP_CMD 0x3
+#define ESP_RSTAT 0x4
+#define ESP_WBUSID 0x4
+#define ESP_RINTR 0x5
+#define ESP_WSEL 0x5
+#define ESP_RSEQ 0x6
+#define ESP_WSYNTP 0x6
+#define ESP_RFLAGS 0x7
+#define ESP_WSYNO 0x7
+#define ESP_CFG1 0x8
+#define ESP_RRES1 0x9
+#define ESP_WCCF 0x9
+#define ESP_RRES2 0xa
+#define ESP_WTEST 0xa
+#define ESP_CFG2 0xb
+#define ESP_CFG3 0xc
+#define ESP_RES3 0xd
+#define ESP_TCHI 0xe
+#define ESP_RES4 0xf
+
+#define CMD_DMA 0x80
+#define CMD_CMD 0x7f
+
+#define CMD_NOP 0x00
+#define CMD_FLUSH 0x01
+#define CMD_RESET 0x02
+#define CMD_BUSRESET 0x03
+#define CMD_TI 0x10
+#define CMD_ICCS 0x11
+#define CMD_MSGACC 0x12
+#define CMD_PAD 0x18
+#define CMD_SATN 0x1a
+#define CMD_SEL 0x41
+#define CMD_SELATN 0x42
+#define CMD_SELATNS 0x43
+#define CMD_ENSEL 0x44
#define STAT_DO 0x00
#define STAT_DI 0x01
#define STAT_CD 0x02
#define STAT_ST 0x03
-#define STAT_MI 0x06
-#define STAT_MO 0x07
+#define STAT_MO 0x06
+#define STAT_MI 0x07
+#define STAT_PIO_MASK 0x06
#define STAT_TC 0x10
-#define STAT_IN 0x80
+#define STAT_PE 0x20
+#define STAT_GE 0x40
+#define STAT_INT 0x80
+
+#define BUSID_DID 0x07
#define INTR_FC 0x08
#define INTR_BS 0x10
#define INTR_DC 0x20
+#define INTR_RST 0x80
#define SEQ_0 0x0
#define SEQ_CD 0x4
-static void handle_satn(ESPState *s)
+#define CFG1_RESREPT 0x40
+
+#define TCHI_FAS100A 0x4
+
+static void esp_raise_irq(ESPState *s)
{
- uint8_t buf[32];
- uint32_t dmaptr, dmalen;
- unsigned int i;
- int64_t nb_sectors;
+ if (!(s->rregs[ESP_RSTAT] & STAT_INT)) {
+ s->rregs[ESP_RSTAT] |= STAT_INT;
+ qemu_irq_raise(s->irq);
+ DPRINTF("Raise IRQ\n");
+ }
+}
+
+static void esp_lower_irq(ESPState *s)
+{
+ if (s->rregs[ESP_RSTAT] & STAT_INT) {
+ s->rregs[ESP_RSTAT] &= ~STAT_INT;
+ qemu_irq_lower(s->irq);
+ DPRINTF("Lower IRQ\n");
+ }
+}
+
+static uint32_t get_cmd(ESPState *s, uint8_t *buf)
+{
+ uint32_t dmalen;
int target;
- dmalen = s->wregs[0] | (s->wregs[1] << 8);
- target = s->wregs[4] & 7;
- DPRINTF("Select with ATN len %d target %d\n", dmalen, target);
+ target = s->wregs[ESP_WBUSID] & BUSID_DID;
if (s->dma) {
- dmaptr = iommu_translate(s->espdmaregs[1]);
- DPRINTF("DMA Direction: %c, addr 0x%8.8x\n", s->espdmaregs[0] & 0x100? 'w': 'r', dmaptr);
- cpu_physical_memory_read(dmaptr, buf, dmalen);
+ dmalen = s->rregs[ESP_TCLO] | (s->rregs[ESP_TCMID] << 8);
+ s->dma_memory_read(s->dma_opaque, buf, dmalen);
} else {
- buf[0] = 0;
- memcpy(&buf[1], s->ti_buf, dmalen);
- dmalen++;
+ dmalen = s->ti_size;
+ memcpy(buf, s->ti_buf, dmalen);
+ buf[0] = 0;
}
- for (i = 0; i < dmalen; i++) {
- DPRINTF("Command %2.2x\n", buf[i]);
- }
- s->ti_dir = 0;
+ DPRINTF("get_cmd: len %d target %d\n", dmalen, target);
+
s->ti_size = 0;
s->ti_rptr = 0;
s->ti_wptr = 0;
- if (target > 4 || !s->bd[target]) { // No such drive
- s->rregs[4] = STAT_IN;
- s->rregs[5] = INTR_DC;
- s->rregs[6] = SEQ_0;
- s->espdmaregs[0] |= 1;
- pic_set_irq(s->irq, 1);
- return;
+ if (s->current_dev) {
+ /* Started a new command before the old one finished. Cancel it. */
+ s->current_dev->info->cancel_io(s->current_dev, 0);
+ s->async_len = 0;
}
- switch (buf[1]) {
- case 0x0:
- DPRINTF("Test Unit Ready (len %d)\n", buf[5]);
- break;
- case 0x12:
- DPRINTF("Inquiry (len %d)\n", buf[5]);
- memset(s->ti_buf, 0, 36);
- if (bdrv_get_type_hint(s->bd[target]) == BDRV_TYPE_CDROM) {
- s->ti_buf[0] = 5;
- memcpy(&s->ti_buf[16], "QEMU CDROM ", 16);
- } else {
- s->ti_buf[0] = 0;
- memcpy(&s->ti_buf[16], "QEMU HARDDISK ", 16);
- }
- memcpy(&s->ti_buf[8], "QEMU ", 8);
- s->ti_buf[2] = 1;
- s->ti_buf[3] = 2;
- s->ti_dir = 1;
- s->ti_size = 36;
- break;
- case 0x1a:
- DPRINTF("Mode Sense(6) (page %d, len %d)\n", buf[3], buf[5]);
- break;
- case 0x25:
- DPRINTF("Read Capacity (len %d)\n", buf[5]);
- memset(s->ti_buf, 0, 8);
- bdrv_get_geometry(s->bd[target], &nb_sectors);
- s->ti_buf[0] = (nb_sectors >> 24) & 0xff;
- s->ti_buf[1] = (nb_sectors >> 16) & 0xff;
- s->ti_buf[2] = (nb_sectors >> 8) & 0xff;
- s->ti_buf[3] = nb_sectors & 0xff;
- s->ti_buf[4] = 0;
- s->ti_buf[5] = 0;
- if (bdrv_get_type_hint(s->bd[target]) == BDRV_TYPE_CDROM)
- s->ti_buf[6] = 8; // sector size 2048
- else
- s->ti_buf[6] = 2; // sector size 512
- s->ti_buf[7] = 0;
- s->ti_dir = 1;
- s->ti_size = 8;
- break;
- case 0x28:
- {
- int64_t offset, len;
-
- if (bdrv_get_type_hint(s->bd[target]) == BDRV_TYPE_CDROM) {
- offset = ((buf[3] << 24) | (buf[4] << 16) | (buf[5] << 8) | buf[6]) * 4;
- len = ((buf[8] << 8) | buf[9]) * 4;
- s->ti_size = len * 2048;
- } else {
- offset = (buf[3] << 24) | (buf[4] << 16) | (buf[5] << 8) | buf[6];
- len = (buf[8] << 8) | buf[9];
- s->ti_size = len * 512;
- }
- DPRINTF("Read (10) (offset %lld len %lld)\n", offset, len);
- bdrv_read(s->bd[target], offset, s->ti_buf, len);
- // XXX error handling
- s->ti_dir = 1;
- break;
- }
- case 0x2a:
- {
- int64_t offset, len;
-
- if (bdrv_get_type_hint(s->bd[target]) == BDRV_TYPE_CDROM) {
- offset = ((buf[3] << 24) | (buf[4] << 16) | (buf[5] << 8) | buf[6]) * 4;
- len = ((buf[8] << 8) | buf[9]) * 4;
- s->ti_size = len * 2048;
- } else {
- offset = (buf[3] << 24) | (buf[4] << 16) | (buf[5] << 8) | buf[6];
- len = (buf[8] << 8) | buf[9];
- s->ti_size = len * 512;
- }
- DPRINTF("Write (10) (offset %lld len %lld)\n", offset, len);
- bdrv_write(s->bd[target], offset, s->ti_buf, len);
- // XXX error handling
- s->ti_dir = 0;
- break;
- }
- default:
- DPRINTF("Unknown SCSI command (%2.2x)\n", buf[1]);
- break;
+
+ if (target >= ESP_MAX_DEVS || !s->bus.devs[target]) {
+ // No such drive
+ s->rregs[ESP_RSTAT] = 0;
+ s->rregs[ESP_RINTR] = INTR_DC;
+ s->rregs[ESP_RSEQ] = SEQ_0;
+ esp_raise_irq(s);
+ return 0;
+ }
+ s->current_dev = s->bus.devs[target];
+ return dmalen;
+}
+
+static void do_busid_cmd(ESPState *s, uint8_t *buf, uint8_t busid)
+{
+ int32_t datalen;
+ int lun;
+
+ DPRINTF("do_busid_cmd: busid 0x%x\n", busid);
+ lun = busid & 7;
+ datalen = s->current_dev->info->send_command(s->current_dev, 0, buf, lun);
+ s->ti_size = datalen;
+ if (datalen != 0) {
+ s->rregs[ESP_RSTAT] = STAT_TC;
+ s->dma_left = 0;
+ s->dma_counter = 0;
+ if (datalen > 0) {
+ s->rregs[ESP_RSTAT] |= STAT_DI;
+ s->current_dev->info->read_data(s->current_dev, 0);
+ } else {
+ s->rregs[ESP_RSTAT] |= STAT_DO;
+ s->current_dev->info->write_data(s->current_dev, 0);
+ }
}
- s->rregs[4] = STAT_IN | STAT_TC | STAT_DI;
- s->rregs[5] = INTR_BS | INTR_FC;
- s->rregs[6] = SEQ_CD;
- s->espdmaregs[0] |= 1;
- pic_set_irq(s->irq, 1);
+ s->rregs[ESP_RINTR] = INTR_BS | INTR_FC;
+ s->rregs[ESP_RSEQ] = SEQ_CD;
+ esp_raise_irq(s);
}
-static void dma_write(ESPState *s, const uint8_t *buf, uint32_t len)
+static void do_cmd(ESPState *s, uint8_t *buf)
{
- uint32_t dmaptr, dmalen;
+ uint8_t busid = buf[0];
- dmalen = s->wregs[0] | (s->wregs[1] << 8);
- DPRINTF("Transfer status len %d\n", dmalen);
+ do_busid_cmd(s, &buf[1], busid);
+}
+
+static void handle_satn(ESPState *s)
+{
+ uint8_t buf[32];
+ int len;
+
+ len = get_cmd(s, buf);
+ if (len)
+ do_cmd(s, buf);
+}
+
+static void handle_s_without_atn(ESPState *s)
+{
+ uint8_t buf[32];
+ int len;
+
+ len = get_cmd(s, buf);
+ if (len) {
+ do_busid_cmd(s, buf, 0);
+ }
+}
+
+static void handle_satn_stop(ESPState *s)
+{
+ s->cmdlen = get_cmd(s, s->cmdbuf);
+ if (s->cmdlen) {
+ DPRINTF("Set ATN & Stop: cmdlen %d\n", s->cmdlen);
+ s->do_cmd = 1;
+ s->rregs[ESP_RSTAT] = STAT_TC | STAT_CD;
+ s->rregs[ESP_RINTR] = INTR_BS | INTR_FC;
+ s->rregs[ESP_RSEQ] = SEQ_CD;
+ esp_raise_irq(s);
+ }
+}
+
+static void write_response(ESPState *s)
+{
+ DPRINTF("Transfer status (sense=%d)\n", s->sense);
+ s->ti_buf[0] = s->sense;
+ s->ti_buf[1] = 0;
if (s->dma) {
- dmaptr = iommu_translate(s->espdmaregs[1]);
- DPRINTF("DMA Direction: %c\n", s->espdmaregs[0] & 0x100? 'w': 'r');
- cpu_physical_memory_write(dmaptr, buf, len);
- s->rregs[4] = STAT_IN | STAT_TC | STAT_ST;
- s->rregs[5] = INTR_BS | INTR_FC;
- s->rregs[6] = SEQ_CD;
- s->espdmaregs[0] |= 1;
+ s->dma_memory_write(s->dma_opaque, s->ti_buf, 2);
+ s->rregs[ESP_RSTAT] = STAT_TC | STAT_ST;
+ s->rregs[ESP_RINTR] = INTR_BS | INTR_FC;
+ s->rregs[ESP_RSEQ] = SEQ_CD;
} else {
- memcpy(s->ti_buf, buf, len);
- s->ti_size = dmalen;
- s->ti_rptr = 0;
- s->ti_wptr = 0;
+ s->ti_size = 2;
+ s->ti_rptr = 0;
+ s->ti_wptr = 0;
+ s->rregs[ESP_RFLAGS] = 2;
}
- pic_set_irq(s->irq, 1);
+ esp_raise_irq(s);
+}
+
+static void esp_dma_done(ESPState *s)
+{
+ s->rregs[ESP_RSTAT] |= STAT_TC;
+ s->rregs[ESP_RINTR] = INTR_BS;
+ s->rregs[ESP_RSEQ] = 0;
+ s->rregs[ESP_RFLAGS] = 0;
+ s->rregs[ESP_TCLO] = 0;
+ s->rregs[ESP_TCMID] = 0;
+ esp_raise_irq(s);
+}
+static void esp_do_dma(ESPState *s)
+{
+ uint32_t len;
+ int to_device;
+
+ to_device = (s->ti_size < 0);
+ len = s->dma_left;
+ if (s->do_cmd) {
+ DPRINTF("command len %d + %d\n", s->cmdlen, len);
+ s->dma_memory_read(s->dma_opaque, &s->cmdbuf[s->cmdlen], len);
+ s->ti_size = 0;
+ s->cmdlen = 0;
+ s->do_cmd = 0;
+ do_cmd(s, s->cmdbuf);
+ return;
+ }
+ if (s->async_len == 0) {
+ /* Defer until data is available. */
+ return;
+ }
+ if (len > s->async_len) {
+ len = s->async_len;
+ }
+ if (to_device) {
+ s->dma_memory_read(s->dma_opaque, s->async_buf, len);
+ } else {
+ s->dma_memory_write(s->dma_opaque, s->async_buf, len);
+ }
+ s->dma_left -= len;
+ s->async_buf += len;
+ s->async_len -= len;
+ if (to_device)
+ s->ti_size += len;
+ else
+ s->ti_size -= len;
+ if (s->async_len == 0) {
+ if (to_device) {
+ // ti_size is negative
+ s->current_dev->info->write_data(s->current_dev, 0);
+ } else {
+ s->current_dev->info->read_data(s->current_dev, 0);
+ /* If there is still data to be read from the device then
+ complete the DMA operation immediately. Otherwise defer
+ until the scsi layer has completed. */
+ if (s->dma_left == 0 && s->ti_size > 0) {
+ esp_dma_done(s);
+ }
+ }
+ } else {
+ /* Partially filled a scsi buffer. Complete immediately. */
+ esp_dma_done(s);
+ }
}
-static const uint8_t okbuf[] = {0, 0};
+static void esp_command_complete(SCSIBus *bus, int reason, uint32_t tag,
+ uint32_t arg)
+{
+ ESPState *s = DO_UPCAST(ESPState, busdev.qdev, bus->qbus.parent);
+
+ if (reason == SCSI_REASON_DONE) {
+ DPRINTF("SCSI Command complete\n");
+ if (s->ti_size != 0)
+ DPRINTF("SCSI command completed unexpectedly\n");
+ s->ti_size = 0;
+ s->dma_left = 0;
+ s->async_len = 0;
+ if (arg)
+ DPRINTF("Command failed\n");
+ s->sense = arg;
+ s->rregs[ESP_RSTAT] = STAT_ST;
+ esp_dma_done(s);
+ s->current_dev = NULL;
+ } else {
+ DPRINTF("transfer %d/%d\n", s->dma_left, s->ti_size);
+ s->async_len = arg;
+ s->async_buf = s->current_dev->info->get_buf(s->current_dev, 0);
+ if (s->dma_left) {
+ esp_do_dma(s);
+ } else if (s->dma_counter != 0 && s->ti_size <= 0) {
+ /* If this was the last part of a DMA transfer then the
+ completion interrupt is deferred to here. */
+ esp_dma_done(s);
+ }
+ }
+}
static void handle_ti(ESPState *s)
{
- uint32_t dmaptr, dmalen;
- unsigned int i;
+ uint32_t dmalen, minlen;
- dmalen = s->wregs[0] | (s->wregs[1] << 8);
- DPRINTF("Transfer Information len %d\n", dmalen);
+ dmalen = s->rregs[ESP_TCLO] | (s->rregs[ESP_TCMID] << 8);
+ if (dmalen==0) {
+ dmalen=0x10000;
+ }
+ s->dma_counter = dmalen;
+
+ if (s->do_cmd)
+ minlen = (dmalen < 32) ? dmalen : 32;
+ else if (s->ti_size < 0)
+ minlen = (dmalen < -s->ti_size) ? dmalen : -s->ti_size;
+ else
+ minlen = (dmalen < s->ti_size) ? dmalen : s->ti_size;
+ DPRINTF("Transfer Information len %d\n", minlen);
if (s->dma) {
- dmaptr = iommu_translate(s->espdmaregs[1]);
- DPRINTF("DMA Direction: %c, addr 0x%8.8x\n", s->espdmaregs[0] & 0x100? 'w': 'r', dmaptr);
- for (i = 0; i < s->ti_size; i++) {
- dmaptr = iommu_translate(s->espdmaregs[1] + i);
- if (s->ti_dir)
- cpu_physical_memory_write(dmaptr, &s->ti_buf[i], 1);
- else
- cpu_physical_memory_read(dmaptr, &s->ti_buf[i], 1);
- }
- s->rregs[4] = STAT_IN | STAT_TC | STAT_ST;
- s->rregs[5] = INTR_BS;
- s->rregs[6] = 0;
- s->espdmaregs[0] |= 1;
- } else {
- s->ti_size = dmalen;
- s->ti_rptr = 0;
- s->ti_wptr = 0;
- }
- pic_set_irq(s->irq, 1);
+ s->dma_left = minlen;
+ s->rregs[ESP_RSTAT] &= ~STAT_TC;
+ esp_do_dma(s);
+ } else if (s->do_cmd) {
+ DPRINTF("command len %d\n", s->cmdlen);
+ s->ti_size = 0;
+ s->cmdlen = 0;
+ s->do_cmd = 0;
+ do_cmd(s, s->cmdbuf);
+ return;
+ }
}
-static void esp_reset(void *opaque)
+static void esp_reset(DeviceState *d)
{
- ESPState *s = opaque;
- memset(s->rregs, 0, ESP_MAXREG);
- s->rregs[0x0e] = 0x4; // Indicate fas100a
- memset(s->espdmaregs, 0, ESPDMA_REGS * 4);
+ ESPState *s = container_of(d, ESPState, busdev.qdev);
+
+ memset(s->rregs, 0, ESP_REGS);
+ memset(s->wregs, 0, ESP_REGS);
+ s->rregs[ESP_TCHI] = TCHI_FAS100A; // Indicate fas100a
+ s->ti_size = 0;
+ s->ti_rptr = 0;
+ s->ti_wptr = 0;
+ s->dma = 0;
+ s->do_cmd = 0;
+
+ s->rregs[ESP_CFG1] = 7;
+}
+
+static void parent_esp_reset(void *opaque, int irq, int level)
+{
+ if (level)
+ esp_reset(opaque);
}
static uint32_t esp_mem_readb(void *opaque, target_phys_addr_t addr)
{
ESPState *s = opaque;
- uint32_t saddr;
+ uint32_t saddr, old_val;
- saddr = (addr & ESP_MAXREG) >> 2;
+ saddr = addr >> s->it_shift;
+ DPRINTF("read reg[%d]: 0x%2.2x\n", saddr, s->rregs[saddr]);
switch (saddr) {
- case 2:
- // FIFO
- if (s->ti_size > 0) {
- s->ti_size--;
- s->rregs[saddr] = s->ti_buf[s->ti_rptr++];
- pic_set_irq(s->irq, 1);
- }
- if (s->ti_size == 0) {
+ case ESP_FIFO:
+ if (s->ti_size > 0) {
+ s->ti_size--;
+ if ((s->rregs[ESP_RSTAT] & STAT_PIO_MASK) == 0) {
+ /* Data out. */
+ ESP_ERROR("PIO data read not implemented\n");
+ s->rregs[ESP_FIFO] = 0;
+ } else {
+ s->rregs[ESP_FIFO] = s->ti_buf[s->ti_rptr++];
+ }
+ esp_raise_irq(s);
+ }
+ if (s->ti_size == 0) {
s->ti_rptr = 0;
s->ti_wptr = 0;
}
- break;
+ break;
+ case ESP_RINTR:
+ /* Clear sequence step, interrupt register and all status bits
+ except TC */
+ old_val = s->rregs[ESP_RINTR];
+ s->rregs[ESP_RINTR] = 0;
+ s->rregs[ESP_RSTAT] &= ~STAT_TC;
+ s->rregs[ESP_RSEQ] = SEQ_CD;
+ esp_lower_irq(s);
+
+ return old_val;
default:
- break;
+ break;
}
- DPRINTF("read reg[%d]: 0x%2.2x\n", saddr, s->rregs[saddr]);
-
return s->rregs[saddr];
}
ESPState *s = opaque;
uint32_t saddr;
- saddr = (addr & ESP_MAXREG) >> 2;
- DPRINTF("write reg[%d]: 0x%2.2x -> 0x%2.2x\n", saddr, s->wregs[saddr], val);
+ saddr = addr >> s->it_shift;
+ DPRINTF("write reg[%d]: 0x%2.2x -> 0x%2.2x\n", saddr, s->wregs[saddr],
+ val);
switch (saddr) {
- case 0:
- case 1:
- s->rregs[saddr] = val;
+ case ESP_TCLO:
+ case ESP_TCMID:
+ s->rregs[ESP_RSTAT] &= ~STAT_TC;
break;
- case 2:
- // FIFO
- s->ti_size++;
- s->ti_buf[s->ti_wptr++] = val & 0xff;
- break;
- case 3:
+ case ESP_FIFO:
+ if (s->do_cmd) {
+ s->cmdbuf[s->cmdlen++] = val & 0xff;
+ } else if (s->ti_size == TI_BUFSZ - 1) {
+ ESP_ERROR("fifo overrun\n");
+ } else {
+ s->ti_size++;
+ s->ti_buf[s->ti_wptr++] = val & 0xff;
+ }
+ break;
+ case ESP_CMD:
s->rregs[saddr] = val;
- // Command
- if (val & 0x80) {
- s->dma = 1;
- } else {
- s->dma = 0;
- }
- switch(val & 0x7f) {
- case 0:
- DPRINTF("NOP (%2.2x)\n", val);
- break;
- case 1:
- DPRINTF("Flush FIFO (%2.2x)\n", val);
- s->rregs[6] = 0;
- s->rregs[5] = INTR_FC;
- break;
- case 2:
- DPRINTF("Chip reset (%2.2x)\n", val);
- esp_reset(s);
- break;
- case 3:
- DPRINTF("Bus reset (%2.2x)\n", val);
- break;
- case 0x10:
- handle_ti(s);
- break;
- case 0x11:
- DPRINTF("Initiator Command Complete Sequence (%2.2x)\n", val);
- dma_write(s, okbuf, 2);
- break;
- case 0x12:
- DPRINTF("Message Accepted (%2.2x)\n", val);
- dma_write(s, okbuf, 2);
- s->rregs[5] = INTR_DC;
- s->rregs[6] = 0;
- break;
- case 0x1a:
- DPRINTF("Set ATN (%2.2x)\n", val);
- break;
- case 0x42:
- handle_satn(s);
- break;
- case 0x43:
- DPRINTF("Set ATN & stop (%2.2x)\n", val);
- handle_satn(s);
- break;
- default:
- DPRINTF("Unhandled ESP command (%2.2x)\n", val);
- break;
- }
- break;
- case 4 ... 7:
- break;
- case 8:
+ if (val & CMD_DMA) {
+ s->dma = 1;
+ /* Reload DMA counter. */
+ s->rregs[ESP_TCLO] = s->wregs[ESP_TCLO];
+ s->rregs[ESP_TCMID] = s->wregs[ESP_TCMID];
+ } else {
+ s->dma = 0;
+ }
+ switch(val & CMD_CMD) {
+ case CMD_NOP:
+ DPRINTF("NOP (%2.2x)\n", val);
+ break;
+ case CMD_FLUSH:
+ DPRINTF("Flush FIFO (%2.2x)\n", val);
+ //s->ti_size = 0;
+ s->rregs[ESP_RINTR] = INTR_FC;
+ s->rregs[ESP_RSEQ] = 0;
+ s->rregs[ESP_RFLAGS] = 0;
+ break;
+ case CMD_RESET:
+ DPRINTF("Chip reset (%2.2x)\n", val);
+ esp_reset(&s->busdev.qdev);
+ break;
+ case CMD_BUSRESET:
+ DPRINTF("Bus reset (%2.2x)\n", val);
+ s->rregs[ESP_RINTR] = INTR_RST;
+ if (!(s->wregs[ESP_CFG1] & CFG1_RESREPT)) {
+ esp_raise_irq(s);
+ }
+ break;
+ case CMD_TI:
+ handle_ti(s);
+ break;
+ case CMD_ICCS:
+ DPRINTF("Initiator Command Complete Sequence (%2.2x)\n", val);
+ write_response(s);
+ s->rregs[ESP_RINTR] = INTR_FC;
+ s->rregs[ESP_RSTAT] |= STAT_MI;
+ break;
+ case CMD_MSGACC:
+ DPRINTF("Message Accepted (%2.2x)\n", val);
+ s->rregs[ESP_RINTR] = INTR_DC;
+ s->rregs[ESP_RSEQ] = 0;
+ s->rregs[ESP_RFLAGS] = 0;
+ esp_raise_irq(s);
+ break;
+ case CMD_PAD:
+ DPRINTF("Transfer padding (%2.2x)\n", val);
+ s->rregs[ESP_RSTAT] = STAT_TC;
+ s->rregs[ESP_RINTR] = INTR_FC;
+ s->rregs[ESP_RSEQ] = 0;
+ break;
+ case CMD_SATN:
+ DPRINTF("Set ATN (%2.2x)\n", val);
+ break;
+ case CMD_SEL:
+ DPRINTF("Select without ATN (%2.2x)\n", val);
+ handle_s_without_atn(s);
+ break;
+ case CMD_SELATN:
+ DPRINTF("Select with ATN (%2.2x)\n", val);
+ handle_satn(s);
+ break;
+ case CMD_SELATNS:
+ DPRINTF("Select with ATN & stop (%2.2x)\n", val);
+ handle_satn_stop(s);
+ break;
+ case CMD_ENSEL:
+ DPRINTF("Enable selection (%2.2x)\n", val);
+ s->rregs[ESP_RINTR] = 0;
+ break;
+ default:
+ ESP_ERROR("Unhandled ESP command (%2.2x)\n", val);
+ break;
+ }
+ break;
+ case ESP_WBUSID ... ESP_WSYNO:
+ break;
+ case ESP_CFG1:
s->rregs[saddr] = val;
break;
- case 9 ... 10:
+ case ESP_WCCF ... ESP_WTEST:
break;
- case 11 ... 15:
+ case ESP_CFG2 ... ESP_RES4:
s->rregs[saddr] = val;
break;
default:
- break;
+ ESP_ERROR("invalid write of 0x%02x at [0x%x]\n", val, saddr);
+ return;
}
s->wregs[saddr] = val;
}
-static CPUReadMemoryFunc *esp_mem_read[3] = {
- esp_mem_readb,
- esp_mem_readb,
+static CPUReadMemoryFunc * const esp_mem_read[3] = {
esp_mem_readb,
+ NULL,
+ NULL,
};
-static CPUWriteMemoryFunc *esp_mem_write[3] = {
- esp_mem_writeb,
+static CPUWriteMemoryFunc * const esp_mem_write[3] = {
esp_mem_writeb,
+ NULL,
esp_mem_writeb,
};
-static uint32_t espdma_mem_readl(void *opaque, target_phys_addr_t addr)
-{
- ESPState *s = opaque;
- uint32_t saddr;
-
- saddr = (addr & ESPDMA_MAXADDR) >> 2;
- DPRINTF("read dmareg[%d]: 0x%8.8x\n", saddr, s->espdmaregs[saddr]);
-
- return s->espdmaregs[saddr];
-}
-
-static void espdma_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
-{
- ESPState *s = opaque;
- uint32_t saddr;
-
- saddr = (addr & ESPDMA_MAXADDR) >> 2;
- DPRINTF("write dmareg[%d]: 0x%8.8x -> 0x%8.8x\n", saddr, s->espdmaregs[saddr], val);
- switch (saddr) {
- case 0:
- if (!(val & 0x10))
- pic_set_irq(s->irq, 0);
- if (val & 0x80) {
- esp_reset(s);
- } else if (val & 0x40) {
- val &= ~0x40;
- } else if (val == 0)
- val = 0x40;
- val &= 0x0fffffff;
- val |= DMA_VER;
- break;
- case 1:
- s->espdmaregs[0] = DMA_LOADED;
- break;
- default:
- break;
+static const VMStateDescription vmstate_esp = {
+ .name ="esp",
+ .version_id = 3,
+ .minimum_version_id = 3,
+ .minimum_version_id_old = 3,
+ .fields = (VMStateField []) {
+ VMSTATE_BUFFER(rregs, ESPState),
+ VMSTATE_BUFFER(wregs, ESPState),
+ VMSTATE_INT32(ti_size, ESPState),
+ VMSTATE_UINT32(ti_rptr, ESPState),
+ VMSTATE_UINT32(ti_wptr, ESPState),
+ VMSTATE_BUFFER(ti_buf, ESPState),
+ VMSTATE_UINT32(sense, ESPState),
+ VMSTATE_UINT32(dma, ESPState),
+ VMSTATE_BUFFER(cmdbuf, ESPState),
+ VMSTATE_UINT32(cmdlen, ESPState),
+ VMSTATE_UINT32(do_cmd, ESPState),
+ VMSTATE_UINT32(dma_left, ESPState),
+ VMSTATE_END_OF_LIST()
}
- s->espdmaregs[saddr] = val;
-}
-
-static CPUReadMemoryFunc *espdma_mem_read[3] = {
- espdma_mem_readl,
- espdma_mem_readl,
- espdma_mem_readl,
-};
-
-static CPUWriteMemoryFunc *espdma_mem_write[3] = {
- espdma_mem_writel,
- espdma_mem_writel,
- espdma_mem_writel,
};
-static void esp_save(QEMUFile *f, void *opaque)
-{
- ESPState *s = opaque;
- unsigned int i;
-
- qemu_put_buffer(f, s->rregs, ESP_MAXREG);
- qemu_put_buffer(f, s->wregs, ESP_MAXREG);
- qemu_put_be32s(f, &s->irq);
- for (i = 0; i < ESPDMA_REGS; i++)
- qemu_put_be32s(f, &s->espdmaregs[i]);
- qemu_put_be32s(f, &s->ti_size);
- qemu_put_be32s(f, &s->ti_rptr);
- qemu_put_be32s(f, &s->ti_wptr);
- qemu_put_be32s(f, &s->ti_dir);
- qemu_put_buffer(f, s->ti_buf, TI_BUFSZ);
- qemu_put_be32s(f, &s->dma);
-}
-
-static int esp_load(QEMUFile *f, void *opaque, int version_id)
+void esp_init(target_phys_addr_t espaddr, int it_shift,
+ ESPDMAMemoryReadWriteFunc dma_memory_read,
+ ESPDMAMemoryReadWriteFunc dma_memory_write,
+ void *dma_opaque, qemu_irq irq, qemu_irq *reset)
{
- ESPState *s = opaque;
- unsigned int i;
-
- if (version_id != 1)
- return -EINVAL;
-
- qemu_get_buffer(f, s->rregs, ESP_MAXREG);
- qemu_get_buffer(f, s->wregs, ESP_MAXREG);
- qemu_get_be32s(f, &s->irq);
- for (i = 0; i < ESPDMA_REGS; i++)
- qemu_get_be32s(f, &s->espdmaregs[i]);
- qemu_get_be32s(f, &s->ti_size);
- qemu_get_be32s(f, &s->ti_rptr);
- qemu_get_be32s(f, &s->ti_wptr);
- qemu_get_be32s(f, &s->ti_dir);
- qemu_get_buffer(f, s->ti_buf, TI_BUFSZ);
- qemu_get_be32s(f, &s->dma);
-
- return 0;
+ DeviceState *dev;
+ SysBusDevice *s;
+ ESPState *esp;
+
+ dev = qdev_create(NULL, "esp");
+ esp = DO_UPCAST(ESPState, busdev.qdev, dev);
+ esp->dma_memory_read = dma_memory_read;
+ esp->dma_memory_write = dma_memory_write;
+ esp->dma_opaque = dma_opaque;
+ esp->it_shift = it_shift;
+ qdev_init_nofail(dev);
+ s = sysbus_from_qdev(dev);
+ sysbus_connect_irq(s, 0, irq);
+ sysbus_mmio_map(s, 0, espaddr);
+ *reset = qdev_get_gpio_in(dev, 0);
}
-void esp_init(BlockDriverState **bd, int irq, uint32_t espaddr, uint32_t espdaddr)
+static int esp_init1(SysBusDevice *dev)
{
- ESPState *s;
- int esp_io_memory, espdma_io_memory;
+ ESPState *s = FROM_SYSBUS(ESPState, dev);
+ int esp_io_memory;
- s = qemu_mallocz(sizeof(ESPState));
- if (!s)
- return;
+ sysbus_init_irq(dev, &s->irq);
+ assert(s->it_shift != -1);
- s->bd = bd;
- s->irq = irq;
+ esp_io_memory = cpu_register_io_memory(esp_mem_read, esp_mem_write, s);
+ sysbus_init_mmio(dev, ESP_REGS << s->it_shift, esp_io_memory);
- esp_io_memory = cpu_register_io_memory(0, esp_mem_read, esp_mem_write, s);
- cpu_register_physical_memory(espaddr, ESP_MAXREG*4, esp_io_memory);
+ qdev_init_gpio_in(&dev->qdev, parent_esp_reset, 1);
- espdma_io_memory = cpu_register_io_memory(0, espdma_mem_read, espdma_mem_write, s);
- cpu_register_physical_memory(espdaddr, 16, espdma_io_memory);
+ scsi_bus_new(&s->bus, &dev->qdev, 0, ESP_MAX_DEVS, esp_command_complete);
+ scsi_bus_legacy_handle_cmdline(&s->bus);
+ return 0;
+}
- esp_reset(s);
+static SysBusDeviceInfo esp_info = {
+ .init = esp_init1,
+ .qdev.name = "esp",
+ .qdev.size = sizeof(ESPState),
+ .qdev.vmsd = &vmstate_esp,
+ .qdev.reset = esp_reset,
+ .qdev.props = (Property[]) {
+ {.name = NULL}
+ }
+};
- register_savevm("esp", espaddr, 1, esp_save, esp_load, s);
- qemu_register_reset(esp_reset, s);
+static void esp_register_devices(void)
+{
+ sysbus_register_withprop(&esp_info);
}
+device_init(esp_register_devices)
projects / qemu.git / blobdiff