/[gxemul]/trunk/src/devices/dev_dc7085.c
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
ViewVC logotype

Diff of /trunk/src/devices/dev_dc7085.c

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

revision 4 by dpavlin, Mon Oct 8 16:18:00 2007 UTC revision 34 by dpavlin, Mon Oct 8 16:21:17 2007 UTC
# Line 1  Line 1 
1  /*  /*
2   *  Copyright (C) 2003-2005  Anders Gavare.  All rights reserved.   *  Copyright (C) 2003-2007  Anders Gavare.  All rights reserved.
3   *   *
4   *  Redistribution and use in source and binary forms, with or without   *  Redistribution and use in source and binary forms, with or without
5   *  modification, are permitted provided that the following conditions are met:   *  modification, are permitted provided that the following conditions are met:
# Line 25  Line 25 
25   *  SUCH DAMAGE.   *  SUCH DAMAGE.
26   *     *  
27   *   *
28   *  $Id: dev_dc7085.c,v 1.49 2005/02/22 20:18:30 debug Exp $   *  $Id: dev_dc7085.c,v 1.60 2006/12/31 21:35:26 debug Exp $
29   *     *  
30   *  DC7085 serial controller, used in some DECstation models.   *  DC7085 serial controller, used in some DECstation models.
31   */   */
# Line 46  Line 46 
46    
47  #define DC_TICK_SHIFT           14  #define DC_TICK_SHIFT           14
48    
49  #define MAX_QUEUE_LEN           4096  #define MAX_QUEUE_LEN           32768
50    
51  struct dc_data {  struct dc_data {
52          struct dc7085regs       regs;          struct dc7085regs       regs;
# Line 63  struct dc_data { Line 63  struct dc_data {
63    
64          int                     tx_scanner;          int                     tx_scanner;
65    
66          int                     irqnr;          struct interrupt        irq;
67          int                     use_fb;          int                     use_fb;
68    
69          struct lk201_data       lk201;          struct lk201_data       lk201;
# Line 78  void add_to_rx_queue(void *e, int ch, in Line 78  void add_to_rx_queue(void *e, int ch, in
78          struct dc_data *d = (struct dc_data *) e;          struct dc_data *d = (struct dc_data *) e;
79          int entries_in_use = d->cur_rx_queue_pos_write -          int entries_in_use = d->cur_rx_queue_pos_write -
80              d->cur_rx_queue_pos_read;              d->cur_rx_queue_pos_read;
81    
82          while (entries_in_use < 0)          while (entries_in_use < 0)
83                  entries_in_use += MAX_QUEUE_LEN;                  entries_in_use += MAX_QUEUE_LEN;
84    
# Line 96  void add_to_rx_queue(void *e, int ch, in Line 97  void add_to_rx_queue(void *e, int ch, in
97  }  }
98    
99    
100  /*  DEVICE_TICK(dc7085)
  *  dev_dc7085_tick():  
  *  
  *  This function is called "every now and then".  
  *  If a key is available from the keyboard, add it to the rx queue.  
  *  If other bits are set, an interrupt might need to be caused.  
  */  
 void dev_dc7085_tick(struct cpu *cpu, void *extra)  
101  {  {
102            /*
103             *  If a key is available from the keyboard, add it to the rx queue.
104             *  If other bits are set, an interrupt might need to be caused.
105             */
106          struct dc_data *d = extra;          struct dc_data *d = extra;
107          int avail;          int avail;
108    
# Line 133  void dev_dc7085_tick(struct cpu *cpu, vo Line 131  void dev_dc7085_tick(struct cpu *cpu, vo
131                          if (d->regs.dc_tcr & (1 << d->tx_scanner)) {                          if (d->regs.dc_tcr & (1 << d->tx_scanner)) {
132                                  d->regs.dc_csr |= CSR_TRDY;                                  d->regs.dc_csr |= CSR_TRDY;
133                                  if (d->regs.dc_csr & CSR_TIE)                                  if (d->regs.dc_csr & CSR_TIE)
134                                          cpu_interrupt(cpu, d->irqnr);                                          INTERRUPT_ASSERT(d->irq);
135    
136                                  d->regs.dc_csr &= ~CSR_TX_LINE_NUM;                                  d->regs.dc_csr &= ~CSR_TX_LINE_NUM;
137                                  d->regs.dc_csr |= (d->tx_scanner << 8);                                  d->regs.dc_csr |= (d->tx_scanner << 8);
# Line 149  void dev_dc7085_tick(struct cpu *cpu, vo Line 147  void dev_dc7085_tick(struct cpu *cpu, vo
147                          return;                          return;
148          }          }
149    
150          lk201_tick(&d->lk201);          lk201_tick(cpu->machine, &d->lk201);
151    
152          avail = d->cur_rx_queue_pos_write != d->cur_rx_queue_pos_read;          avail = d->cur_rx_queue_pos_write != d->cur_rx_queue_pos_read;
153    
# Line 157  void dev_dc7085_tick(struct cpu *cpu, vo Line 155  void dev_dc7085_tick(struct cpu *cpu, vo
155                  d->regs.dc_csr |= CSR_RDONE;                  d->regs.dc_csr |= CSR_RDONE;
156    
157          if ((d->regs.dc_csr & CSR_RDONE) && (d->regs.dc_csr & CSR_RIE))          if ((d->regs.dc_csr & CSR_RDONE) && (d->regs.dc_csr & CSR_RIE))
158                  cpu_interrupt(cpu, d->irqnr);                  INTERRUPT_ASSERT(d->irq);
159  }  }
160    
161    
162  /*  DEVICE_ACCESS(dc7085)
  *  dev_dc7085_access():  
  */  
 int dev_dc7085_access(struct cpu *cpu, struct memory *mem,  
         uint64_t relative_addr, unsigned char *data, size_t len,  
         int writeflag, void *extra)  
163  {  {
164          uint64_t idata = 0, odata = 0;          uint64_t idata = 0, odata = 0;
165          int i;          size_t i;
166          struct dc_data *d = extra;          struct dc_data *d = extra;
167    
168          idata = memory_readmax64(cpu, data, len);          if (writeflag == MEM_WRITE)
169                    idata = memory_readmax64(cpu, data, len);
170    
171          /*  Always clear:  */          /*  Always clear:  */
172          d->regs.dc_csr &= ~CSR_CLR;          d->regs.dc_csr &= ~CSR_CLR;
# Line 227  int dev_dc7085_access(struct cpu *cpu, s Line 221  int dev_dc7085_access(struct cpu *cpu, s
221                              (lineno << RBUF_LINE_NUM_SHIFT) | ch;                              (lineno << RBUF_LINE_NUM_SHIFT) | ch;
222    
223                          d->regs.dc_csr &= ~CSR_RDONE;                          d->regs.dc_csr &= ~CSR_RDONE;
224                          cpu_interrupt_ack(cpu, d->irqnr);                          INTERRUPT_DEASSERT(d->irq);
225    
226                          d->just_transmitted_something = 4;                          d->just_transmitted_something = 4;
227                  }                  }
# Line 238  int dev_dc7085_access(struct cpu *cpu, s Line 232  int dev_dc7085_access(struct cpu *cpu, s
232                              (int)idata);  */                              (int)idata);  */
233                          d->regs.dc_tcr = idata;                          d->regs.dc_tcr = idata;
234                          d->regs.dc_csr &= ~CSR_TRDY;                          d->regs.dc_csr &= ~CSR_TRDY;
235                          cpu_interrupt_ack(cpu, d->irqnr);                          INTERRUPT_DEASSERT(d->irq);
236                          goto do_return;                          goto do_return;
237                  } else {                  } else {
238                          /*  read:  */                          /*  read:  */
# Line 256  int dev_dc7085_access(struct cpu *cpu, s Line 250  int dev_dc7085_access(struct cpu *cpu, s
250                          lk201_tx_data(&d->lk201, line_no, idata);                          lk201_tx_data(&d->lk201, line_no, idata);
251    
252                          d->regs.dc_csr &= ~CSR_TRDY;                          d->regs.dc_csr &= ~CSR_TRDY;
253                          cpu_interrupt_ack(cpu, d->irqnr);                          INTERRUPT_DEASSERT(d->irq);
254    
255                          d->just_transmitted_something = 4;                          d->just_transmitted_something = 4;
256                  } else {                  } else {
# Line 299  do_return: Line 293  do_return:
293   *  DECstation keyboard, instead of a plain serial console.   *  DECstation keyboard, instead of a plain serial console.
294   */   */
295  int dev_dc7085_init(struct machine *machine, struct memory *mem,  int dev_dc7085_init(struct machine *machine, struct memory *mem,
296          uint64_t baseaddr, int irq_nr, int use_fb)          uint64_t baseaddr, char *irq_path, int use_fb)
297  {  {
298          struct dc_data *d;          struct dc_data *d;
299    
# Line 309  int dev_dc7085_init(struct machine *mach Line 303  int dev_dc7085_init(struct machine *mach
303                  exit(1);                  exit(1);
304          }          }
305          memset(d, 0, sizeof(struct dc_data));          memset(d, 0, sizeof(struct dc_data));
306          d->irqnr  = irq_nr;  
307            INTERRUPT_CONNECT(irq_path, d->irq);
308          d->use_fb = use_fb;          d->use_fb = use_fb;
309    
310          d->regs.dc_csr = CSR_TRDY | CSR_MSE;          d->regs.dc_csr = CSR_TRDY | CSR_MSE;
311          d->regs.dc_tcr = 0x00;          d->regs.dc_tcr = 0x00;
312    
313          d->console_handle = console_start_slave(machine, "DC7085");          d->console_handle = console_start_slave(machine, "DC7085", 1);
314    
315          lk201_init(&d->lk201, use_fb, add_to_rx_queue, d->console_handle, d);          lk201_init(&d->lk201, use_fb, add_to_rx_queue, d->console_handle, d);
316    
317          memory_device_register(mem, "dc7085", baseaddr, DEV_DC7085_LENGTH,          memory_device_register(mem, "dc7085", baseaddr, DEV_DC7085_LENGTH,
318              dev_dc7085_access, d, MEM_DEFAULT, NULL);              dev_dc7085_access, d, DM_DEFAULT, NULL);
319          machine_add_tickfunction(machine, dev_dc7085_tick, d, DC_TICK_SHIFT);          machine_add_tickfunction(machine, dev_dc7085_tick, d,
320                DC_TICK_SHIFT, 0.0);
321    
322          return d->console_handle;          return d->console_handle;
323  }  }
Legend:
Removed from v.4  
changed lines
  Added in v.34
  ViewVC Help
Powered by ViewVC 1.1.26