/*
* Copyright (c) 2006 Ondrej Palkovsky
* Copyright (c) 2008 Martin Decky
* Copyright (c) 2008 Pavel Rimsky
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @defgroup sgcnfb SGCN
* @brief userland driver of the Serengeti console output
* @{
*/
/** @file
*/
#include <async.h>
#include <ipc/ipc.h>
#include <ipc/fb.h>
#include <sysinfo.h>
#include <as.h>
#include <errno.h>
#include <stdio.h>
#include <ddi.h>
#include "serial_console.h"
#include "sgcn.h"
#define WIDTH 80
#define HEIGHT 24
/**
* Virtual address mapped to SRAM.
*/
static uintptr_t sram_virt_addr;
/**
* SGCN buffer offset within SGCN.
*/
static uintptr_t sram_buffer_offset;
/* Allow only 1 connection */
static int client_connected = 0;
/**
* SGCN buffer header. It is placed at the very beginning of the SGCN
* buffer.
*/
typedef struct {
/** hard-wired to "CON" */
char magic[4];
/** we don't need this */
char unused[24];
/** offset within the SGCN buffer of the output buffer start */
uint32_t out_begin;
/** offset within the SGCN buffer of the output buffer end */
uint32_t out_end;
/** offset within the SGCN buffer of the output buffer read pointer */
uint32_t out_rdptr;
/** offset within the SGCN buffer of the output buffer write pointer */
uint32_t out_wrptr;
} __attribute__ ((packed)) sgcn_buffer_header_t;
/*
* Returns a pointer to the object of a given type which is placed at the given
* offset from the console buffer beginning.
*/
#define SGCN_BUFFER(type, offset) \
((type *) (sram_virt_addr + sram_buffer_offset + (offset)))
/** Returns a pointer to the console buffer header. */
#define SGCN_BUFFER_HEADER (SGCN_BUFFER(sgcn_buffer_header_t, 0))
/**
* Pushes the character to the SGCN serial.
* @param c character to be pushed
*/
static void sgcn_putc(char c)
{
uint32_t begin = SGCN_BUFFER_HEADER->out_begin;
uint32_t end = SGCN_BUFFER_HEADER->out_end;
uint32_t size = end - begin;
/* we need pointers to volatile variables */
volatile char *buf_ptr = (volatile char *)
SGCN_BUFFER(char, SGCN_BUFFER_HEADER->out_wrptr);
volatile uint32_t *out_wrptr_ptr = &(SGCN_BUFFER_HEADER->out_wrptr);
volatile uint32_t *out_rdptr_ptr = &(SGCN_BUFFER_HEADER->out_rdptr);
uint32_t new_wrptr = (((*out_wrptr_ptr) - begin + 1) % size) + begin;
while (*out_rdptr_ptr == new_wrptr)
;
*buf_ptr = c;
*out_wrptr_ptr = new_wrptr;
}
/**
* Main function of the thread serving client connections.
*/
static void sgcn_client_connection(ipc_callid_t iid, ipc_call_t *icall)
{
int retval;
ipc_callid_t callid;
ipc_call_t call;
char c;
int lastcol = 0;
int lastrow = 0;
int newcol;
int newrow;
int fgcolor;
int bgcolor;
int i;
if (client_connected) {
ipc_answer_0(iid, ELIMIT);
return;
}
client_connected = 1;
ipc_answer_0(iid, EOK);
/* Clear the terminal, set scrolling region
to 0 - 24 lines */
serial_clrscr();
serial_goto(0, 0);
serial_puts("\033[0;24r");
while (true) {
callid = async_get_call(&call);
switch (IPC_GET_METHOD(call)) {
case IPC_M_PHONE_HUNGUP:
client_connected = 0;
ipc_answer_0(callid, EOK);
return;
case FB_PUTCHAR:
c = IPC_GET_ARG1(call);
newrow = IPC_GET_ARG2(call);
newcol = IPC_GET_ARG3(call);
if ((lastcol != newcol) || (lastrow != newrow))
serial_goto(newrow, newcol);
lastcol = newcol + 1;
lastrow = newrow;
sgcn_putc(c);
retval = 0;
break;
case FB_CURSOR_GOTO:
newrow = IPC_GET_ARG1(call);
newcol = IPC_GET_ARG2(call);
serial_goto(newrow, newcol);
lastrow = newrow;
lastcol = newcol;
retval = 0;
break;
case FB_GET_CSIZE:
ipc_answer_2(callid, EOK, HEIGHT, WIDTH);
continue;
case FB_CLEAR:
serial_clrscr();
retval = 0;
break;
case FB_SET_STYLE:
fgcolor = IPC_GET_ARG1(call);
bgcolor = IPC_GET_ARG2(call);
if (fgcolor < bgcolor)
serial_set_style(0);
else
serial_set_style(7);
retval = 0;
break;
case FB_SCROLL:
i = IPC_GET_ARG1(call);
if ((i > HEIGHT) || (i < -HEIGHT)) {
retval = EINVAL;
break;
}
serial_scroll(i);
serial_goto(lastrow, lastcol);
retval = 0;
break;
case FB_CURSOR_VISIBILITY:
if(IPC_GET_ARG1(call))
serial_cursor_enable();
else
serial_cursor_disable();
retval = 0;
break;
default:
retval = ENOENT;
}
ipc_answer_0(callid, retval);
}
}
/**
* Initializes the SGCN serial driver.
*/
int sgcn_init(void)
{
sram_virt_addr = (uintptr_t) as_get_mappable_page(
sysinfo_value("sram.area.size"));
int result = physmem_map(
(void *) sysinfo_value("sram.address.physical"),
(void *) sram_virt_addr,
sysinfo_value("sram.area.size") / PAGE_SIZE,
AS_AREA_READ | AS_AREA_WRITE
);
if (result != 0) {
printf("SGCN: uspace driver couldn't map physical memory: %d\n", result);
}
serial_console_init(sgcn_putc, WIDTH, HEIGHT);
sram_buffer_offset = sysinfo_value("sram.buffer.offset");
async_set_client_connection(sgcn_client_connection);
return 0;
}
/**
* @}
*/