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Misc fixes (Herve Poussineau)

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- Fix internal fifo size (16 bytes), according to http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR53C9X.txt
- Fix values of STAT_MI and STAT_MO
- Give a scsi ID to adapter, and prevent this ID to be used by devices
- Prevent fifo overrun in esp_mem_writeb
- Add a ESP_ERROR macro, and use it where appropriate


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5811 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
blueswir1 2008-11-29 16:45:28 +00:00
parent ce802585a9
commit 8dea1dd406
1 changed files with 21 additions and 14 deletions
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35
hw/esp.c
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@ -44,8 +44,11 @@ do { printf("ESP: " fmt , ##args); } while (0)
#define DPRINTF(fmt, args...) do {} while (0)
#endif
#define ESP_ERROR(fmt, args...) \
do { printf("ESP ERROR: %s: " fmt, __func__ , ##args); } while (0)
#define ESP_REGS 16
#define TI_BUFSZ 32
#define TI_BUFSZ 16
typedef struct ESPState ESPState;
@ -120,8 +123,8 @@ struct ESPState {
#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
@ -129,6 +132,8 @@ struct ESPState {
#define STAT_GE 0x40
#define STAT_INT 0x80
#define BUSID_DID 0x07
#define INTR_FC 0x08
#define INTR_BS 0x10
#define INTR_DC 0x20
@ -165,7 +170,7 @@ static uint32_t get_cmd(ESPState *s, uint8_t *buf)
int target;
dmalen = s->rregs[ESP_TCLO] | (s->rregs[ESP_TCMID] << 8);
target = s->wregs[ESP_WBUSID] & 7;
target = s->wregs[ESP_WBUSID] & BUSID_DID;
DPRINTF("get_cmd: len %d target %d\n", dmalen, target);
if (s->dma) {
s->dma_memory_read(s->dma_opaque, buf, dmalen);
@ -318,7 +323,7 @@ static void esp_do_dma(ESPState *s)
} else {
s->current_dev->read_data(s->current_dev, 0);
/* If there is still data to be read from the device then
complete the DMA operation immeriately. Otherwise defer
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);
@ -407,6 +412,8 @@ static void esp_reset(void *opaque)
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)
@ -427,8 +434,8 @@ static uint32_t esp_mem_readb(void *opaque, target_phys_addr_t addr)
if (s->ti_size > 0) {
s->ti_size--;
if ((s->rregs[ESP_RSTAT] & STAT_PIO_MASK) == 0) {
/* Data in/out. */
fprintf(stderr, "esp: PIO data read not implemented\n");
/* 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++];
@ -467,11 +474,8 @@ static void esp_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
case ESP_FIFO:
if (s->do_cmd) {
s->cmdbuf[s->cmdlen++] = val & 0xff;
} else if ((s->rregs[ESP_RSTAT] & STAT_PIO_MASK) == 0) {
uint8_t buf;
buf = val & 0xff;
s->ti_size--;
fprintf(stderr, "esp: PIO data write not implemented\n");
} 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;
@ -537,7 +541,7 @@ static void esp_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
DPRINTF("Enable selection (%2.2x)\n", val);
break;
default:
DPRINTF("Unhandled ESP command (%2.2x)\n", val);
ESP_ERROR("Unhandled ESP command (%2.2x)\n", val);
break;
}
break;
@ -555,7 +559,8 @@ static void esp_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
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;
}
@ -620,6 +625,8 @@ void esp_scsi_attach(void *opaque, BlockDriverState *bd, int id)
if (id < 0) {
for (id = 0; id < ESP_MAX_DEVS; id++) {
if (id == (s->rregs[ESP_CFG1] & 0x7))
continue;
if (s->scsi_dev[id] == NULL)
break;
}