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3549 rimsky 1
/*
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 * Copyright (c) 2006 Ondrej Palkovsky
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 * Copyright (c) 2008 Martin Decky
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 * Copyright (c) 2008 Pavel Rimsky
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @defgroup sgcnfb SGCN
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 * @brief   userland driver of the Serengeti console output
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 * @{
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 */
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/** @file
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 */
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#include <async.h>
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#include <ipc/ipc.h>
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#include <ipc/fb.h>
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#include <sysinfo.h>
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#include <as.h>
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#include <errno.h>
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#include <stdio.h>
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#include <ddi.h>
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3582 rimsky 47
#include "serial_console.h"
3549 rimsky 48
#include "sgcn.h"
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#define WIDTH 80
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#define HEIGHT 24
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/**
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 * Virtual address mapped to SRAM.
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 */
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static uintptr_t sram_virt_addr;
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/**
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 * SGCN buffer offset within SGCN.
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 */
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static uintptr_t sram_buffer_offset;
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/* Allow only 1 connection */
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static int client_connected = 0;
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/**
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 * SGCN buffer header. It is placed at the very beginning of the SGCN
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 * buffer.
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 */
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typedef struct {
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    /** hard-wired to "CON" */
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    char magic[4];
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    /** we don't need this */
3582 rimsky 75
    char unused[24];
3549 rimsky 76
 
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    /** offset within the SGCN buffer of the output buffer start */
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    uint32_t out_begin;
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    /** offset within the SGCN buffer of the output buffer end */
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    uint32_t out_end;
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    /** offset within the SGCN buffer of the output buffer read pointer */
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    uint32_t out_rdptr;
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    /** offset within the SGCN buffer of the output buffer write pointer */
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    uint32_t out_wrptr;
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} __attribute__ ((packed)) sgcn_buffer_header_t;
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/*
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 * Returns a pointer to the object of a given type which is placed at the given
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 * offset from the console buffer beginning.
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 */
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#define SGCN_BUFFER(type, offset) \
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        ((type *) (sram_virt_addr + sram_buffer_offset + (offset)))
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/** Returns a pointer to the console buffer header. */
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#define SGCN_BUFFER_HEADER  (SGCN_BUFFER(sgcn_buffer_header_t, 0))
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3618 rimsky 101
/**
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 * Pushes the character to the SGCN serial.
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 * @param c character to be pushed
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 */
3549 rimsky 105
static void sgcn_putc(char c)
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{
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    uint32_t begin = SGCN_BUFFER_HEADER->out_begin;
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    uint32_t end = SGCN_BUFFER_HEADER->out_end;
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    uint32_t size = end - begin;
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    /* we need pointers to volatile variables */
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    volatile char *buf_ptr = (volatile char *)
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        SGCN_BUFFER(char, SGCN_BUFFER_HEADER->out_wrptr);
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    volatile uint32_t *out_wrptr_ptr = &(SGCN_BUFFER_HEADER->out_wrptr);
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    volatile uint32_t *out_rdptr_ptr = &(SGCN_BUFFER_HEADER->out_rdptr);
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    uint32_t new_wrptr = (((*out_wrptr_ptr) - begin + 1) % size) + begin;
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    while (*out_rdptr_ptr == new_wrptr)
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        ;
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    *buf_ptr = c;
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    *out_wrptr_ptr = new_wrptr;
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}
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3618 rimsky 124
/**
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 * Main function of the thread serving client connections.
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 */
3549 rimsky 127
static void sgcn_client_connection(ipc_callid_t iid, ipc_call_t *icall)
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{
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    int retval;
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    ipc_callid_t callid;
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    ipc_call_t call;
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    char c;
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    int lastcol = 0;
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    int lastrow = 0;
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    int newcol;
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    int newrow;
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    int fgcolor;
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    int bgcolor;
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    int i;
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    if (client_connected) {
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        ipc_answer_0(iid, ELIMIT);
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        return;
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    }
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146
    client_connected = 1;
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    ipc_answer_0(iid, EOK);
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149
    /* Clear the terminal, set scrolling region
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       to 0 - 24 lines */
3582 rimsky 151
    serial_clrscr();
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    serial_goto(0, 0);
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    serial_puts("\033[0;24r");
3549 rimsky 154
 
155
    while (true) {
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        callid = async_get_call(&call);
157
        switch (IPC_GET_METHOD(call)) {
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        case IPC_M_PHONE_HUNGUP:
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            client_connected = 0;
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            ipc_answer_0(callid, EOK);
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            return;
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        case FB_PUTCHAR:
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            c = IPC_GET_ARG1(call);
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            newrow = IPC_GET_ARG2(call);
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            newcol = IPC_GET_ARG3(call);
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            if ((lastcol != newcol) || (lastrow != newrow))
3582 rimsky 167
                serial_goto(newrow, newcol);
3549 rimsky 168
            lastcol = newcol + 1;
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            lastrow = newrow;
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            sgcn_putc(c);
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            retval = 0;
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            break;
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        case FB_CURSOR_GOTO:
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            newrow = IPC_GET_ARG1(call);
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            newcol = IPC_GET_ARG2(call);
3582 rimsky 176
            serial_goto(newrow, newcol);
3549 rimsky 177
            lastrow = newrow;
178
            lastcol = newcol;
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            retval = 0;
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            break;
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        case FB_GET_CSIZE:
182
            ipc_answer_2(callid, EOK, HEIGHT, WIDTH);
183
            continue;
184
        case FB_CLEAR:
3582 rimsky 185
            serial_clrscr();
3549 rimsky 186
            retval = 0;
187
            break;
188
        case FB_SET_STYLE:
189
            fgcolor = IPC_GET_ARG1(call);
190
            bgcolor = IPC_GET_ARG2(call);
191
            if (fgcolor < bgcolor)
3582 rimsky 192
                serial_set_style(0);
3549 rimsky 193
            else
3582 rimsky 194
                serial_set_style(7);
3549 rimsky 195
            retval = 0;
196
            break;
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        case FB_SCROLL:
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            i = IPC_GET_ARG1(call);
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            if ((i > HEIGHT) || (i < -HEIGHT)) {
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                retval = EINVAL;
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                break;
202
            }
3582 rimsky 203
            serial_scroll(i);
204
            serial_goto(lastrow, lastcol);
3549 rimsky 205
            retval = 0;
206
            break;
207
        case FB_CURSOR_VISIBILITY:
208
            if(IPC_GET_ARG1(call))
3582 rimsky 209
                serial_cursor_enable();
3549 rimsky 210
            else
3582 rimsky 211
                serial_cursor_disable();
3549 rimsky 212
            retval = 0;
213
            break;
214
        default:
215
            retval = ENOENT;
216
        }
217
        ipc_answer_0(callid, retval);
218
    }
219
}
220
 
3618 rimsky 221
/**
222
 * Initializes the SGCN serial driver.
223
 */
3549 rimsky 224
int sgcn_init(void)
225
{
3618 rimsky 226
    sram_virt_addr = (uintptr_t) as_get_mappable_page(
227
        sysinfo_value("sram.area.size"));
3549 rimsky 228
    int result = physmem_map(
229
        (void *) sysinfo_value("sram.address.physical"),
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        (void *) sram_virt_addr,
231
        sysinfo_value("sram.area.size") / PAGE_SIZE,
232
        AS_AREA_READ | AS_AREA_WRITE
233
        );
234
    if (result != 0) {
235
        printf("SGCN: uspace driver couldn't map physical memory: %d\n",
236
            result);
237
    }
238
 
3582 rimsky 239
    serial_console_init(sgcn_putc, WIDTH, HEIGHT);
240
 
3549 rimsky 241
    sram_buffer_offset = sysinfo_value("sram.buffer.offset");
242
 
243
    async_set_client_connection(sgcn_client_connection);
244
    return 0;
245
}
246
 
247
/**
248
 * @}
249
 */
3618 rimsky 250