diff options
Diffstat (limited to 'hw/esp.c')
| -rw-r--r-- | hw/esp.c | 35 |
1 files changed, 21 insertions, 14 deletions
@@ -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; } |