0,0 → 1,157 |
/* |
* Copyright (c) 2009 Jakub Jermar |
* 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. |
*/ |
|
/** @addtogroup fhc |
* @{ |
*/ |
|
/** |
* @file fhc.c |
* @brief FHC bus controller driver. |
*/ |
|
#include <ipc/ipc.h> |
#include <ipc/services.h> |
#include <ipc/bus.h> |
#include <ipc/ns.h> |
#include <sysinfo.h> |
#include <as.h> |
#include <ddi.h> |
#include <align.h> |
#include <bool.h> |
#include <errno.h> |
#include <async.h> |
#include <align.h> |
#include <async.h> |
#include <stdio.h> |
#include <ipc/devmap.h> |
|
#define NAME "fhc" |
|
#define FHC_UART_INR 0x39 |
|
#define FHC_UART_IMAP 0x0 |
#define FHC_UART_ICLR 0x4 |
|
static void *fhc_uart_phys; |
static volatile uint32_t *fhc_uart_virt; |
static size_t fhc_uart_size; |
|
/** Handle one connection to fhc. |
* |
* @param iid Hash of the request that opened the connection. |
* @param icall Call data of the request that opened the connection. |
*/ |
static void fhc_connection(ipc_callid_t iid, ipc_call_t *icall) |
{ |
ipc_callid_t callid; |
ipc_call_t call; |
|
/* |
* Answer the first IPC_M_CONNECT_ME_TO call. |
*/ |
ipc_answer_0(iid, EOK); |
|
while (1) { |
int inr; |
|
callid = async_get_call(&call); |
switch (IPC_GET_METHOD(call)) { |
case BUS_CLEAR_INTERRUPT: |
inr = IPC_GET_ARG1(call); |
switch (inr) { |
case FHC_UART_INR: |
fhc_uart_virt[FHC_UART_ICLR] = 0; |
ipc_answer_0(callid, EOK); |
break; |
default: |
ipc_answer_0(callid, ENOTSUP); |
break; |
} |
break; |
default: |
ipc_answer_0(callid, EINVAL); |
break; |
} |
} |
} |
|
/** Initialize the FHC driver. |
* |
* So far, the driver heavily depends on information provided by the kernel via |
* sysinfo. In the future, there should be a standalone FHC driver. |
*/ |
static bool fhc_init(void) |
{ |
ipcarg_t phonead; |
|
fhc_uart_size = sysinfo_value("fhc.uart.size"); |
fhc_uart_phys = (void *) sysinfo_value("fhc.uart.physical"); |
|
if (!fhc_uart_size) { |
printf(NAME ": no FHC UART registers found\n"); |
return false; |
} |
|
fhc_uart_virt = as_get_mappable_page(fhc_uart_size); |
|
int flags = AS_AREA_READ | AS_AREA_WRITE; |
int retval = physmem_map(fhc_uart_phys, (void *) fhc_uart_virt, |
ALIGN_UP(fhc_uart_size, PAGE_SIZE) >> PAGE_WIDTH, flags); |
|
if (retval < 0) { |
printf(NAME ": Error mapping FHC UART registers\n"); |
return false; |
} |
|
printf(NAME ": FHC UART registers at %p, %d bytes\n", fhc_uart_phys, |
fhc_uart_size); |
|
async_set_client_connection(fhc_connection); |
ipc_connect_to_me(PHONE_NS, SERVICE_FHC, 0, 0, &phonead); |
|
return true; |
} |
|
int main(int argc, char **argv) |
{ |
printf(NAME ": HelenOS FHC bus controller driver\n"); |
|
if (!fhc_init()) |
return -1; |
|
printf(NAME ": Accepting connections\n"); |
async_manager(); |
|
/* Never reached */ |
return 0; |
} |
|
/** |
* @} |
*/ |