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/* gpio.h -- GPIO code simulation
   Copyright (C) 2001 Erez Volk, erez@mailandnews.comopencores.org
 
   This file is part of OpenRISC 1000 Architectural Simulator.
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
 
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
 
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <string.h>
 
#include "config.h"
 
#ifdef HAVE_INTTYPES_H
#include <inttypes.h>
#endif
 
#include "port.h"
#include "arch.h"
#include "abstract.h"
#include "gpio.h"
#include "gpio_i.h"
#include "sim-config.h"
#include "pic.h"
#include "vapi.h"
#include "debug.h"
 
static struct gpio_device gpios[MAX_GPIOS];
 
static void gpio_vapi_read( unsigned long id, unsigned long data );
static uint32_t gpio_read32( oraddr_t addr, void *dat );
static void gpio_write32( oraddr_t addr, uint32_t value, void *dat );
 
static void gpio_external_clock( unsigned long value );
static void gpio_device_clock( struct gpio_device *gpio );
static int gpio_find_device( oraddr_t addr, struct gpio_device **gpio, oraddr_t *reladdr );
static struct gpio_device *gpio_find_vapi_device( unsigned long id, unsigned *which_vapi );
 
/* Initialize all parameters and state */
void gpio_reset( void )
{
  static int first_time = 1;
  unsigned i;
 
  if ( first_time ) {
    memset( gpios, 0, sizeof(gpios) );
    first_time = 0;
  }
 
  for ( i = 0; i < config.ngpios; ++ i ) {
    struct gpio_device *gpio = &(gpios[i]);
 
    gpio->gpio_number = i;
    gpio->baseaddr = config.gpios[i].baseaddr;
 
    if ( gpio->baseaddr != 0 ) {
      /* Get IRQ */
      gpio->irq = config.gpios[i].irq;
 
      /* Register memory range */
      register_memoryarea( gpio->baseaddr, GPIO_ADDR_SPACE, 4, 0, gpio_read32, gpio_write32, NULL );
 
      /* Possibly connect to VAPI */
      if ( config.gpios[i].base_vapi_id ) {
        gpio->base_vapi_id = config.gpios[i].base_vapi_id;
        vapi_install_multi_handler( gpio->base_vapi_id, GPIO_NUM_VAPI_IDS, gpio_vapi_read );
      }
    }
  }
}
 
 
/* Dump status */
void gpio_status( void )
{
  unsigned i;
 
  for ( i = 0; i < config.ngpios; ++ i ) {
    struct gpio_device *gpio = &(gpios[i]);
 
    if ( gpio->baseaddr == 0 )
      continue;
 
    PRINTF( "\nGPIO %u at 0x%"PRIxADDR":\n", i, gpio->baseaddr );
    PRINTF( "RGPIO_IN     : 0x%08lX\n", gpio->curr.in );
    PRINTF( "RGPIO_OUT    : 0x%08lX\n", gpio->curr.out );
    PRINTF( "RGPIO_OE     : 0x%08lX\n", gpio->curr.oe );
    PRINTF( "RGPIO_INTE   : 0x%08lX\n", gpio->curr.inte );
    PRINTF( "RGPIO_PTRIG  : 0x%08lX\n", gpio->curr.ptrig );
    PRINTF( "RGPIO_AUX    : 0x%08lX\n", gpio->curr.aux );
    PRINTF( "RGPIO_CTRL   : 0x%08lX\n", gpio->curr.ctrl );
    PRINTF( "RGPIO_INTS   : 0x%08lX\n", gpio->curr.ints );
  }
}
 
 
/* Convert a memory address to a device struct and relative address.
 * Return nonzero on success */
int gpio_find_device( oraddr_t addr, struct gpio_device **gpio, oraddr_t *reladdr )
{
  unsigned i;
  *gpio = NULL;
 
  for ( i = 0; i < config.ngpios && *gpio == NULL; ++ i ) {
    if ( (addr >= gpios[i].baseaddr) && (addr < gpios[i].baseaddr + GPIO_ADDR_SPACE) )
      *gpio = &(gpios[i]);
  }
 
  /* verify we found a device */
  if ( *gpio == NULL )
    return 0;
 
  /* Verify legal address */
  if ( (addr - (*gpio)->baseaddr) % 4 != 0 )
    return 0;
 
  *reladdr = addr - (*gpio)->baseaddr;
  return 1;
}
 
 
/* Find device by vapi id */
struct gpio_device *gpio_find_vapi_device( unsigned long id, unsigned *which )
{
  unsigned i;
 
  for ( i = 0; i < config.ngpios; ++ i )
    if ( (id >= gpios[i].base_vapi_id) && (id < gpios[i].base_vapi_id + GPIO_NUM_VAPI_IDS) ) {
      *which = id - gpios[i].base_vapi_id;
      return &(gpios[i]);
    }
 
  return NULL;
}
 
 
/* Wishbone read */
uint32_t gpio_read32( oraddr_t addr, void *dat )
{
  struct gpio_device *gpio;
  if ( !gpio_find_device( addr, &gpio, &addr ) )        {
    debug( 2, "gpio_read32( 0x%"PRIxADDR" ): Not in registered range(s)\n", addr );
    return 0;
  }
 
  switch( addr ) {
  case RGPIO_IN: return gpio->curr.in | gpio->curr.out;
  case RGPIO_OUT: return gpio->curr.out;
  case RGPIO_OE: return gpio->curr.oe;
  case RGPIO_INTE: return gpio->curr.inte;
  case RGPIO_PTRIG: return gpio->curr.ptrig;
  case RGPIO_AUX: return gpio->curr.aux;
  case RGPIO_CTRL: return gpio->curr.ctrl;
  case RGPIO_INTS: return gpio->curr.ints;
  }
}
 
 
/* Wishbone write */
void gpio_write32( oraddr_t addr, uint32_t value, void *dat )
{
  struct gpio_device *gpio;
  if ( !gpio_find_device( addr, &gpio, &addr ) )        {
    debug( 2, "gpio_write32( 0x%"PRIxADDR" ): Not in registered range(s)\n", addr );
    return;
  }
 
  switch( addr ) {
  case RGPIO_IN: debug( 5, "GPIO: Cannot write to RGPIO_IN\n" ); break;
  case RGPIO_OUT: gpio->next.out = value; break;
  case RGPIO_OE: gpio->next.oe = value; break;
  case RGPIO_INTE: gpio->next.inte = value; break;
  case RGPIO_PTRIG: gpio->next.ptrig = value; break;
  case RGPIO_AUX: gpio->next.aux = value; break;
  case RGPIO_CTRL: gpio->next.ctrl = value; break;
  case RGPIO_INTS: gpio->next.ints = value; break;
  }
}
 
 
/* Input from "outside world" */
void gpio_vapi_read( unsigned long id, unsigned long data )
{
  unsigned which;
  struct gpio_device *gpio = gpio_find_vapi_device( id, &which );
 
  debug( 5, "GPIO: id %08lx, data %08lx\n", id, data );
 
  if ( !gpio ) {
    debug( 1, "GPIO: VAPI ID %08lx is not ours!\n", id );
    return;
  }
 
  switch( which ) {
  case GPIO_VAPI_DATA:
    debug( 4, "GPIO: Next input from VAPI = 0x%08lx (RGPIO_OE = 0x%08lx)\n",
           data, gpio->next.oe );
    gpio->next.in = data;
    break;
  case GPIO_VAPI_AUX:
    gpio->auxiliary_inputs = data;
    break;
  case GPIO_VAPI_RGPIO_OE:
    gpio->next.oe = data;
    break;
  case GPIO_VAPI_RGPIO_INTE:
    gpio->next.inte = data;
    break;
  case GPIO_VAPI_RGPIO_PTRIG:
    gpio->next.ptrig = data;
    break;
  case GPIO_VAPI_RGPIO_AUX:
    gpio->next.aux = data;
    break;
  case GPIO_VAPI_RGPIO_CTRL:
    gpio->next.ctrl = data;
    break;
  case GPIO_VAPI_CLOCK:
    gpio_external_clock( data );
    break;
  }
}
 
/* System Clock. */
void gpio_clock( void )
{
  unsigned i;
 
  for ( i = 0; i < config.ngpios; ++ i )
    if ( !(gpios[i].curr.ctrl & RGPIO_CTRL_ECLK) )
      gpio_device_clock( &(gpios[i]) );
}
 
/* External Clock. */
void gpio_external_clock( unsigned long value )
{
  unsigned i;
 
  /* "Normalize" clock value */
  value = (value != 0);
 
  for ( i = 0; i < config.ngpios; ++ i ) {
    struct gpio_device *gpio = &(gpios[i]);
 
    int use_external_clock = ((gpio->curr.ctrl & RGPIO_CTRL_ECLK) == RGPIO_CTRL_ECLK);
    int negative_edge = ((gpio->curr.ctrl & RGPIO_CTRL_NEC) == RGPIO_CTRL_NEC);
 
    gpio->next.external_clock = value;
 
    if ( use_external_clock && (gpio->next.external_clock != gpio->curr.external_clock) && (value != negative_edge) )
      gpio_device_clock( gpio );
  }
}
 
 
/* Clock as handld by one device. */
void gpio_device_clock( struct gpio_device *gpio )
{
  /* Calculate new inputs and outputs */
  gpio->next.in &= ~gpio->next.oe; /* Only input bits */
  /* Replace requested output bits with aux input */
  gpio->next.out = (gpio->next.out & ~gpio->next.aux) | (gpio->auxiliary_inputs & gpio->next.aux);
  gpio->next.out &= gpio->next.oe; /* Only output-enabled bits */
 
  /* If any outputs changed, notify the world (i.e. vapi) */
  if ( gpio->next.out != gpio->curr.out ) {
    debug( 4, "GPIO: New output 0x%08lx, RGPIO_OE = 0x%08lx\n", gpio->next.out,
           gpio->next.oe );
    if ( gpio->base_vapi_id )
      vapi_send( gpio->base_vapi_id + GPIO_VAPI_DATA, gpio->next.out );
  }
 
  /* If any inputs changed and interrupt enabled, generate interrupt */
  if ( gpio->next.in != gpio->curr.in ) {
    debug( 4, "GPIO: New input 0x%08lx\n", gpio->next.in );
 
    if ( gpio->next.ctrl & RGPIO_CTRL_INTE ) {
      unsigned changed_bits = gpio->next.in ^ gpio->curr.in; /* inputs that have changed */
      unsigned set_bits = changed_bits & gpio->next.in; /* inputs that have been set */
      unsigned cleared_bits = changed_bits & gpio->curr.in; /* inputs that have been cleared */
      unsigned relevant_bits = (gpio->next.ptrig & set_bits) | (~gpio->next.ptrig & cleared_bits);
 
      if ( relevant_bits & gpio->next.inte ) {
        debug( 3, "GPIO: Reporting interrupt %d\n", gpio->irq );
        report_interrupt( gpio->irq );
        gpio->next.ctrl |= RGPIO_CTRL_INTS;
        gpio->next.ints |= relevant_bits & gpio->next.inte;
      }
    }
  }
 
  /* Switch to values for next clock */
  memcpy( &(gpio->curr), &(gpio->next), sizeof(gpio->curr) );
}
 
/*---------------------------------------------------[ GPIO configuration ]---*/
void gpio_ngpios(union param_val val, void *dat)
{
  if (val.int_val >= 0 && val.int_val < MAX_GPIOS)
    config.ngpios = val.int_val;
  else
    CONFIG_ERROR("invalid number of devices.");
}
 
void gpio_baseaddr(union param_val val, void *dat)
{
  if (current_device >= 0 && current_device < config.ngpios)
    config.gpios[current_device].baseaddr = val.int_val;
  else
    CONFIG_ERROR("invalid device number.");
}
 
void gpio_irq(union param_val val, void *dat)
{
  if (current_device >= 0 && current_device < config.ngpios)
    config.gpios[current_device].irq = val.int_val;
  else
    CONFIG_ERROR("invalid device number.");
}
 
void gpio_base_vapi_id(union param_val val, void *dat)
{
  if (current_device >= 0 && current_device < config.ngpios)
    config.gpios[current_device].base_vapi_id = val.int_val;
  else
    CONFIG_ERROR("invalid device number.");
}
 
void reg_gpio_sec(void)
{
  struct config_section *sec = reg_config_sec("gpio", NULL, NULL);
 
  reg_config_param(sec, "ngpios", paramt_int, gpio_ngpios);
  reg_config_param(sec, "device", paramt_int, change_device);
  reg_config_param(sec, "baseaddr", paramt_addr, gpio_baseaddr);
  reg_config_param(sec, "irq", paramt_int, gpio_irq);
  reg_config_param(sec, "base_vapi_id", paramt_int, gpio_base_vapi_id);
  reg_config_param(sec, "enddevice", paramt_none, end_device);
}

Line No.	Rev	Author	Line
1	444	erez	`/* gpio.h -- GPIO code simulation`
2			`Copyright (C) 2001 Erez Volk, erez@mailandnews.comopencores.org`
3
4			`This file is part of OpenRISC 1000 Architectural Simulator.`
5
6			`This program is free software; you can redistribute it and/or modify`
7			`it under the terms of the GNU General Public License as published by`
8			`the Free Software Foundation; either version 2 of the License, or`
9			`(at your option) any later version.`
10
11			`This program is distributed in the hope that it will be useful,`
12			`but WITHOUT ANY WARRANTY; without even the implied warranty of`
13			`MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the`
14			`GNU General Public License for more details.`
15
16			`You should have received a copy of the GNU General Public License`
17			`along with this program; if not, write to the Free Software`
18			`Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.`
19			`*/`
20	1308	phoenix	`#include <string.h>`
21	444	erez
22	1350	nogj	`#include "config.h"`
23
24			`#ifdef HAVE_INTTYPES_H`
25			`#include <inttypes.h>`
26			`#endif`
27
28			`#include "port.h"`
29			`#include "arch.h"`
30	1308	phoenix	`#include "abstract.h"`
31	444	erez	`#include "gpio.h"`
32			`#include "gpio_i.h"`
33			`#include "sim-config.h"`
34			`#include "pic.h"`
35			`#include "vapi.h"`
36	1308	phoenix	`#include "debug.h"`
37	444	erez
38			`static struct gpio_device gpios[MAX_GPIOS];`
39
40			`static void gpio_vapi_read( unsigned long id, unsigned long data );`
41	1359	nogj	`static uint32_t gpio_read32( oraddr_t addr, void *dat );`
42			`static void gpio_write32( oraddr_t addr, uint32_t value, void *dat );`
43	444	erez
44			`static void gpio_external_clock( unsigned long value );`
45			`static void gpio_device_clock( struct gpio_device *gpio );`
46	1350	nogj	`static int gpio_find_device( oraddr_t addr, struct gpio_device *gpio, oraddr_t reladdr );`
47	444	erez	`static struct gpio_device gpio_find_vapi_device( unsigned long id, unsigned which_vapi );`
48
49			`/* Initialize all parameters and state */`
50			`void gpio_reset( void )`
51			`{`
52			`static int first_time = 1;`
53	1308	phoenix	`unsigned i;`
54	444	erez
55			`if ( first_time ) {`
56			`memset( gpios, 0, sizeof(gpios) );`
57			`first_time = 0;`
58			`}`
59	549	markom
60	477	erez	`for ( i = 0; i < config.ngpios; ++ i ) {`
61	444	erez	`struct gpio_device *gpio = &(gpios[i]);`
62
63			`gpio->gpio_number = i;`
64			`gpio->baseaddr = config.gpios[i].baseaddr;`
65
66			`if ( gpio->baseaddr != 0 ) {`
67			`/* Get IRQ */`
68			`gpio->irq = config.gpios[i].irq;`
69
70			`/* Register memory range */`
71	1359	nogj	`register_memoryarea( gpio->baseaddr, GPIO_ADDR_SPACE, 4, 0, gpio_read32, gpio_write32, NULL );`
72	444	erez
73			`/* Possibly connect to VAPI */`
74	477	erez	`if ( config.gpios[i].base_vapi_id ) {`
75			`gpio->base_vapi_id = config.gpios[i].base_vapi_id;`
76			`vapi_install_multi_handler( gpio->base_vapi_id, GPIO_NUM_VAPI_IDS, gpio_vapi_read );`
77			`}`
78	444	erez	`}`
79			`}`
80			`}`
81
82
83			`/* Dump status */`
84			`void gpio_status( void )`
85			`{`
86			`unsigned i;`
87
88	477	erez	`for ( i = 0; i < config.ngpios; ++ i ) {`
89	444	erez	`struct gpio_device *gpio = &(gpios[i]);`
90
91			`if ( gpio->baseaddr == 0 )`
92			`continue;`
93
94	1350	nogj	`PRINTF( "\nGPIO %u at 0x%"PRIxADDR":\n", i, gpio->baseaddr );`
95	997	markom	`PRINTF( "RGPIO_IN : 0x%08lX\n", gpio->curr.in );`
96			`PRINTF( "RGPIO_OUT : 0x%08lX\n", gpio->curr.out );`
97			`PRINTF( "RGPIO_OE : 0x%08lX\n", gpio->curr.oe );`
98			`PRINTF( "RGPIO_INTE : 0x%08lX\n", gpio->curr.inte );`
99			`PRINTF( "RGPIO_PTRIG : 0x%08lX\n", gpio->curr.ptrig );`
100			`PRINTF( "RGPIO_AUX : 0x%08lX\n", gpio->curr.aux );`
101			`PRINTF( "RGPIO_CTRL : 0x%08lX\n", gpio->curr.ctrl );`
102			`PRINTF( "RGPIO_INTS : 0x%08lX\n", gpio->curr.ints );`
103	444	erez	`}`
104			`}`
105
106
107			`/* Convert a memory address to a device struct and relative address.`
108			`* Return nonzero on success */`
109	1350	nogj	`int gpio_find_device( oraddr_t addr, struct gpio_device *gpio, oraddr_t reladdr )`
110	444	erez	`{`
111			`unsigned i;`
112			`*gpio = NULL;`
113
114	477	erez	`for ( i = 0; i < config.ngpios && *gpio == NULL; ++ i ) {`
115	444	erez	`if ( (addr >= gpios[i].baseaddr) && (addr < gpios[i].baseaddr + GPIO_ADDR_SPACE) )`
116			`*gpio = &(gpios[i]);`
117			`}`
118
119			`/* verify we found a device */`
120			`if ( *gpio == NULL )`
121			`return 0;`
122
123			`/* Verify legal address */`
124			`if ( (addr - (*gpio)->baseaddr) % 4 != 0 )`
125			`return 0;`
126
127			`reladdr = addr - (gpio)->baseaddr;`
128			`return 1;`
129			`}`
130
131
132			`/* Find device by vapi id */`
133			`struct gpio_device gpio_find_vapi_device( unsigned long id, unsigned which )`
134			`{`
135	1308	phoenix	`unsigned i;`
136	444	erez
137	477	erez	`for ( i = 0; i < config.ngpios; ++ i )`
138			`if ( (id >= gpios[i].base_vapi_id) && (id < gpios[i].base_vapi_id + GPIO_NUM_VAPI_IDS) ) {`
139			`*which = id - gpios[i].base_vapi_id;`
140			`return &(gpios[i]);`
141			`}`
142	444	erez
143			`return NULL;`
144			`}`
145
146
147			`/* Wishbone read */`
148	1359	nogj	`uint32_t gpio_read32( oraddr_t addr, void *dat )`
149	444	erez	`{`
150			`struct gpio_device *gpio;`
151			`if ( !gpio_find_device( addr, &gpio, &addr ) ) {`
152	1350	nogj	`debug( 2, "gpio_read32( 0x%"PRIxADDR" ): Not in registered range(s)\n", addr );`
153	444	erez	`return 0;`
154			`}`
155
156			`switch( addr ) {`
157	502	erez	`case RGPIO_IN: return gpio->curr.in \| gpio->curr.out;`
158	444	erez	`case RGPIO_OUT: return gpio->curr.out;`
159			`case RGPIO_OE: return gpio->curr.oe;`
160			`case RGPIO_INTE: return gpio->curr.inte;`
161			`case RGPIO_PTRIG: return gpio->curr.ptrig;`
162			`case RGPIO_AUX: return gpio->curr.aux;`
163			`case RGPIO_CTRL: return gpio->curr.ctrl;`
164	502	erez	`case RGPIO_INTS: return gpio->curr.ints;`
165	444	erez	`}`
166			`}`
167
168
169			`/* Wishbone write */`
170	1359	nogj	`void gpio_write32( oraddr_t addr, uint32_t value, void *dat )`
171	444	erez	`{`
172			`struct gpio_device *gpio;`
173			`if ( !gpio_find_device( addr, &gpio, &addr ) ) {`
174	1350	nogj	`debug( 2, "gpio_write32( 0x%"PRIxADDR" ): Not in registered range(s)\n", addr );`
175	444	erez	`return;`
176			`}`
177
178			`switch( addr ) {`
179	483	erez	`case RGPIO_IN: debug( 5, "GPIO: Cannot write to RGPIO_IN\n" ); break;`
180	444	erez	`case RGPIO_OUT: gpio->next.out = value; break;`
181			`case RGPIO_OE: gpio->next.oe = value; break;`
182			`case RGPIO_INTE: gpio->next.inte = value; break;`
183			`case RGPIO_PTRIG: gpio->next.ptrig = value; break;`
184			`case RGPIO_AUX: gpio->next.aux = value; break;`
185			`case RGPIO_CTRL: gpio->next.ctrl = value; break;`
186	502	erez	`case RGPIO_INTS: gpio->next.ints = value; break;`
187	444	erez	`}`
188			`}`
189
190
191			`/* Input from "outside world" */`
192			`void gpio_vapi_read( unsigned long id, unsigned long data )`
193			`{`
194			`unsigned which;`
195			`struct gpio_device *gpio = gpio_find_vapi_device( id, &which );`
196
197	1350	nogj	`debug( 5, "GPIO: id %08lx, data %08lx\n", id, data );`
198	444	erez
199			`if ( !gpio ) {`
200	1350	nogj	`debug( 1, "GPIO: VAPI ID %08lx is not ours!\n", id );`
201	444	erez	`return;`
202			`}`
203
204			`switch( which ) {`
205	477	erez	`case GPIO_VAPI_DATA:`
206	1350	nogj	`debug( 4, "GPIO: Next input from VAPI = 0x%08lx (RGPIO_OE = 0x%08lx)\n",`
207			`data, gpio->next.oe );`
208	477	erez	`gpio->next.in = data;`
209			`break;`
210			`case GPIO_VAPI_AUX:`
211			`gpio->auxiliary_inputs = data;`
212			`break;`
213			`case GPIO_VAPI_RGPIO_OE:`
214			`gpio->next.oe = data;`
215			`break;`
216			`case GPIO_VAPI_RGPIO_INTE:`
217			`gpio->next.inte = data;`
218			`break;`
219			`case GPIO_VAPI_RGPIO_PTRIG:`
220			`gpio->next.ptrig = data;`
221			`break;`
222			`case GPIO_VAPI_RGPIO_AUX:`
223			`gpio->next.aux = data;`
224			`break;`
225			`case GPIO_VAPI_RGPIO_CTRL:`
226			`gpio->next.ctrl = data;`
227			`break;`
228			`case GPIO_VAPI_CLOCK:`
229			`gpio_external_clock( data );`
230			`break;`
231	444	erez	`}`
232			`}`
233
234			`/* System Clock. */`
235			`void gpio_clock( void )`
236			`{`
237			`unsigned i;`
238
239	477	erez	`for ( i = 0; i < config.ngpios; ++ i )`
240	444	erez	`if ( !(gpios[i].curr.ctrl & RGPIO_CTRL_ECLK) )`
241			`gpio_device_clock( &(gpios[i]) );`
242			`}`
243
244			`/* External Clock. */`
245			`void gpio_external_clock( unsigned long value )`
246			`{`
247			`unsigned i;`
248
249	477	erez	`/* "Normalize" clock value */`
250	444	erez	`value = (value != 0);`
251
252	477	erez	`for ( i = 0; i < config.ngpios; ++ i ) {`
253	444	erez	`struct gpio_device *gpio = &(gpios[i]);`
254
255	477	erez	`int use_external_clock = ((gpio->curr.ctrl & RGPIO_CTRL_ECLK) == RGPIO_CTRL_ECLK);`
256			`int negative_edge = ((gpio->curr.ctrl & RGPIO_CTRL_NEC) == RGPIO_CTRL_NEC);`
257	444	erez
258			`gpio->next.external_clock = value;`
259
260	477	erez	`if ( use_external_clock && (gpio->next.external_clock != gpio->curr.external_clock) && (value != negative_edge) )`
261	444	erez	`gpio_device_clock( gpio );`
262			`}`
263			`}`
264
265	477	erez
266	444	erez	`/* Clock as handld by one device. */`
267			`void gpio_device_clock( struct gpio_device *gpio )`
268			`{`
269	445	erez	`/* Calculate new inputs and outputs */`
270			`gpio->next.in &= ~gpio->next.oe; /* Only input bits */`
271			`/* Replace requested output bits with aux input */`
272			`gpio->next.out = (gpio->next.out & ~gpio->next.aux) \| (gpio->auxiliary_inputs & gpio->next.aux);`
273			`gpio->next.out &= gpio->next.oe; /* Only output-enabled bits */`
274
275	444	erez	`/* If any outputs changed, notify the world (i.e. vapi) */`
276	477	erez	`if ( gpio->next.out != gpio->curr.out ) {`
277	1350	nogj	`debug( 4, "GPIO: New output 0x%08lx, RGPIO_OE = 0x%08lx\n", gpio->next.out,`
278			`gpio->next.oe );`
279	477	erez	`if ( gpio->base_vapi_id )`
280			`vapi_send( gpio->base_vapi_id + GPIO_VAPI_DATA, gpio->next.out );`
281			`}`
282	444	erez
283	445	erez	`/* If any inputs changed and interrupt enabled, generate interrupt */`
284	477	erez	`if ( gpio->next.in != gpio->curr.in ) {`
285	1350	nogj	`debug( 4, "GPIO: New input 0x%08lx\n", gpio->next.in );`
286	477	erez
287			`if ( gpio->next.ctrl & RGPIO_CTRL_INTE ) {`
288			`unsigned changed_bits = gpio->next.in ^ gpio->curr.in; /* inputs that have changed */`
289			`unsigned set_bits = changed_bits & gpio->next.in; /* inputs that have been set */`
290			`unsigned cleared_bits = changed_bits & gpio->curr.in; /* inputs that have been cleared */`
291			`unsigned relevant_bits = (gpio->next.ptrig & set_bits) \| (~gpio->next.ptrig & cleared_bits);`
292
293			`if ( relevant_bits & gpio->next.inte ) {`
294	499	erez	`debug( 3, "GPIO: Reporting interrupt %d\n", gpio->irq );`
295	477	erez	`report_interrupt( gpio->irq );`
296	502	erez	`gpio->next.ctrl \|= RGPIO_CTRL_INTS;`
297			`gpio->next.ints \|= relevant_bits & gpio->next.inte;`
298	477	erez	`}`
299	444	erez	`}`
300			`}`
301
302			`/* Switch to values for next clock */`
303			`memcpy( &(gpio->curr), &(gpio->next), sizeof(gpio->curr) );`
304			`}`
305	1358	nogj
306			`/---------------------------------------------------[ GPIO configuration ]---/`
307			`void gpio_ngpios(union param_val val, void *dat)`
308			`{`
309			`if (val.int_val >= 0 && val.int_val < MAX_GPIOS)`
310			`config.ngpios = val.int_val;`
311			`else`
312			`CONFIG_ERROR("invalid number of devices.");`
313			`}`
314
315			`void gpio_baseaddr(union param_val val, void *dat)`
316			`{`
317			`if (current_device >= 0 && current_device < config.ngpios)`
318			`config.gpios[current_device].baseaddr = val.int_val;`
319			`else`
320			`CONFIG_ERROR("invalid device number.");`
321			`}`
322
323			`void gpio_irq(union param_val val, void *dat)`
324			`{`
325			`if (current_device >= 0 && current_device < config.ngpios)`
326			`config.gpios[current_device].irq = val.int_val;`
327			`else`
328			`CONFIG_ERROR("invalid device number.");`
329			`}`
330
331			`void gpio_base_vapi_id(union param_val val, void *dat)`
332			`{`
333			`if (current_device >= 0 && current_device < config.ngpios)`
334			`config.gpios[current_device].base_vapi_id = val.int_val;`
335			`else`
336			`CONFIG_ERROR("invalid device number.");`
337			`}`
338
339			`void reg_gpio_sec(void)`
340			`{`
341			`struct config_section *sec = reg_config_sec("gpio", NULL, NULL);`
342
343			`reg_config_param(sec, "ngpios", paramt_int, gpio_ngpios);`
344			`reg_config_param(sec, "device", paramt_int, change_device);`
345			`reg_config_param(sec, "baseaddr", paramt_addr, gpio_baseaddr);`
346			`reg_config_param(sec, "irq", paramt_int, gpio_irq);`
347			`reg_config_param(sec, "base_vapi_id", paramt_int, gpio_base_vapi_id);`
348			`reg_config_param(sec, "enddevice", paramt_none, end_device);`
349			`}`

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[/] [or1k/] [branches/] [stable_0_2_x/] [or1ksim/] [peripheral/] [gpio.c] - Blame information for rev 1359