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uart_drv: transition to new base API

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* Unify uart drivers of different hardware drivers
* Remove deprecated IRQ activations
* Remove additional timer thread in Fiasco* KDB driver
* Move more generic UART definitions to specific supported
  platforms (e.g.: pl011 -> pbxa9)
* Move internal definitions from global to local headers

Ref #1987
Fix #2071
This commit is contained in:
Stefan Kalkowski 2016-08-23 15:36:06 +02:00 committed by Christian Helmuth
parent a75684d217
commit f1535b2481
31 changed files with 1015 additions and 1455 deletions
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37
repos/os/include/spec/exynos5/uart_defs.h
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@ -1,37 +0,0 @@
/*
* \brief EXYNOS5 UART definitions
* \author Stefan Kalkowski <stefan.kalkowski@genode-labs.com>
* \date 2013-06-05
*/
/*
* Copyright (C) 2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _INCLUDE__SPEC__EXYNOS5__UART_DEFS_H_
#define _INCLUDE__SPEC__EXYNOS5__UART_DEFS_H_
#include <drivers/board_base.h>
enum {
/** Number of UARTs */
UARTS_NUM = 2,
BAUD_115200 = 115200,
};
static struct Exynos_uart_cfg {
Genode::addr_t mmio_base;
Genode::size_t mmio_size;
int irq_number;
} exynos_uart_cfg[UARTS_NUM] = {
/* temporary workaround having first UART twice (most run-scripts have first UART reserved for the kernel ) */
{ Genode::Board_base::UART_2_MMIO_BASE, 4096, Genode::Board_base::UART_2_IRQ },
{ Genode::Board_base::UART_2_MMIO_BASE, 4096, Genode::Board_base::UART_2_IRQ },
};
#endif /* _INCLUDE__SPEC__EXYNOS5__UART_DEFS_H_ */

39
repos/os/include/spec/panda/uart_defs.h
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@ -1,39 +0,0 @@
/*
* \brief OMAP4 UART definitions
* \author Ivan Loskutov <ivan.loskutov@ksyslabs.org>
* \date 2012-11-08
*/
/*
* Copyright (C) 2012 Ksys Labs LLC
* Copyright (C) 2011-2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _INCLUDE__SPEC__PANDA__UART_DEFS_H_
#define _INCLUDE__SPEC__PANDA__UART_DEFS_H_
#include <spec/panda/drivers/board_base.h>
enum {
/** Number of UARTs */
UARTS_NUM = 4,
BAUD_115200 = 26,
};
static struct Omap_uart_cfg {
Genode::addr_t mmio_base;
Genode::size_t mmio_size;
int irq_number;
} omap_uart_cfg[UARTS_NUM] = {
{ Genode::Board_base::TL16C750_1_MMIO_BASE, Genode::Board_base::TL16C750_MMIO_SIZE, Genode::Board_base::TL16C750_1_IRQ },
{ Genode::Board_base::TL16C750_2_MMIO_BASE, Genode::Board_base::TL16C750_MMIO_SIZE, Genode::Board_base::TL16C750_2_IRQ },
{ Genode::Board_base::TL16C750_3_MMIO_BASE, Genode::Board_base::TL16C750_MMIO_SIZE, Genode::Board_base::TL16C750_3_IRQ },
{ Genode::Board_base::TL16C750_4_MMIO_BASE, Genode::Board_base::TL16C750_MMIO_SIZE, Genode::Board_base::TL16C750_4_IRQ },
};
#endif /* _INCLUDE__SPEC__PANDA__UART_DEFS_H_ */

66
repos/os/include/spec/pbxa9/pl011_defs.h
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@ -1,66 +0,0 @@
/*
* \brief PL011 UART definitions for the RealView platform
* \author Christian Helmuth
* \date 2011-05-27
*/
/*
* Copyright (C) 2011-2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _INCLUDE__SPEC__PBXA9__PL011_DEFS_H_
#define _INCLUDE__SPEC__PBXA9__PL011_DEFS_H_
#include <base/stdint.h>
#include <drivers/board_base.h>
enum {
/** Number of UARTs */
PL011_NUM = 4,
/**
* MMIO regions
*/
PL011_PHYS0 = 0x10009000, /* base for UART 0 */
PL011_PHYS1 = 0x1000a000, /* base for UART 1 */
PL011_PHYS2 = 0x1000b000, /* base for UART 2 */
PL011_PHYS3 = 0x1000c000, /* base for UART 3 */
PL011_SIZE = 0x1000, /* size of each MMIO region */
/**
* Interrupt lines
*/
PL011_IRQ0 = Genode::Board_base::PL011_0_IRQ, /* UART 0 */
PL011_IRQ1 = Genode::Board_base::PL011_1_IRQ, /* UART 1 */
PL011_IRQ2 = Genode::Board_base::PL011_2_IRQ, /* UART 2 */
PL011_IRQ3 = Genode::Board_base::PL011_3_IRQ, /* UART 3 */
/**
* UART baud rate configuration (precalculated)
*
* div = 24000000 / 16 / baud rate
* IBRD = floor(div)
* FBRD = floor((div - IBRD) * 64 + 0.5)
*/
PL011_IBRD_115200 = 13, PL011_FBRD_115200 = 1,
PL011_IBRD_19200 = 78, PL011_FBRD_19200 = 8,
PL011_IBRD_9600 = 156, PL011_FBRD_9600 = 16,
};
static struct Pl011_uart {
Genode::addr_t mmio_base;
Genode::size_t mmio_size;
int irq_number;
} pl011_uart[PL011_NUM] = {
{ PL011_PHYS0, PL011_SIZE, PL011_IRQ0 },
{ PL011_PHYS1, PL011_SIZE, PL011_IRQ1 },
{ PL011_PHYS2, PL011_SIZE, PL011_IRQ2 },
{ PL011_PHYS3, PL011_SIZE, PL011_IRQ3 },
};
#endif /* _INCLUDE__SPEC__PBXA9__PL011_DEFS_H_ */

12
repos/os/run/uart.run
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@ -46,9 +46,7 @@ set config {
</provides>
<config>
<policy label="test-uart1" uart="1"/>
<policy label="test-uart2" uart="2"/>
<policy label="test-uart3" uart="3"/>
<policy label="test-uart4" uart="1"/>
<policy label="test-uart2" uart="1"/>
</config>
</start>
<start name="test-uart1">
@ -59,14 +57,6 @@ set config {
<binary name="test-uart"/>
<resource name="RAM" quantum="1M"/>
</start>
<start name="test-uart3">
<binary name="test-uart"/>
<resource name="RAM" quantum="1M"/>
</start>
<start name="test-uart4">
<binary name="test-uart"/>
<resource name="RAM" quantum="1M"/>
</start>
</config>
}

122
repos/os/src/drivers/uart/kdb/kdb_uart.h
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@ -1,122 +0,0 @@
/*
* \brief Fiasco(.OC) KDB UART driver
* \author Christian Prochaska
* \date 2013-03-07
*/
/*
* Copyright (C) 2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _KDB_UART_H_
#define _KDB_UART_H_
/* Fiasco.OC includes */
namespace Fiasco {
#include <l4/sys/kdebug.h>
}
/* Genode includes */
#include <base/thread.h>
#include <timer_session/connection.h>
/* local includes */
#include "uart_driver.h"
using namespace Genode;
class Kdb_uart : public Uart::Driver
{
private:
signed char _buffered_char;
Lock _kdb_read_lock;
enum { STACK_SIZE = 2*1024*sizeof(addr_t) };
class Char_avail_checker_thread : public Thread_deprecated<STACK_SIZE>
{
private:
Uart::Driver &_uart_driver;
Uart::Char_avail_callback &_char_avail_callback;
public:
Char_avail_checker_thread(Uart::Driver &uart_driver,
Uart::Char_avail_callback &char_avail_callback)
:
Thread_deprecated<STACK_SIZE>("char_avail_handler"),
_uart_driver(uart_driver),
_char_avail_callback(char_avail_callback)
{ }
void entry()
{
Timer::Connection timer;
for(;;) {
if (_uart_driver.char_avail())
_char_avail_callback();
else
timer.msleep(20);
}
}
} _char_avail_checker_thread;
public:
/**
* Constructor
*/
Kdb_uart(Uart::Char_avail_callback &callback)
:
_buffered_char(-1),
_char_avail_checker_thread(*this, callback)
{
_char_avail_checker_thread.start();
}
/***************************
** UART driver interface **
***************************/
void put_char(char c)
{
Fiasco::outchar(c);
}
bool char_avail()
{
Lock_guard<Lock> kdb_read_lock_guard(_kdb_read_lock);
if (_buffered_char == -1)
_buffered_char = Fiasco::l4kd_inchar();
return (_buffered_char != -1);
}
char get_char()
{
char result;
if (_buffered_char != -1) {
result = _buffered_char;
_buffered_char = -1;
} else
result = 0;
return result;
}
void baud_rate(int bits_per_second)
{
}
};
#endif /* _KDB_UART_H_ */

70
repos/os/src/drivers/uart/kdb/main.cc
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@ -1,70 +0,0 @@
/*
* \brief Fiasco(.OC) KDB UART driver
* \author Christian Prochaska
* \date 2013-03-07
*/
/*
* Copyright (C) 2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#include <base/printf.h>
#include <base/sleep.h>
#include <cap_session/connection.h>
#include "uart_component.h"
#include "kdb_uart.h"
int main(int argc, char **argv)
{
using namespace Genode;
printf("--- Fiasco(.OC) KDB UART driver started ---\n");
/**
* Factory used by 'Uart::Root' at session creation/destruction time
*/
struct Kdb_uart_driver_factory : Uart::Driver_factory
{
Kdb_uart *uart;
/**
* Constructor
*/
Kdb_uart_driver_factory() : uart(0) { }
Uart::Driver *create(unsigned index, unsigned baudrate,
Uart::Char_avail_callback &callback)
{
/*
* We assume the underlying kernel uses UART0
*/
if (index > 0)
throw Uart::Driver_factory::Not_available();
if (!uart)
uart = new (env()->heap()) Kdb_uart(callback);
return uart;
}
void destroy(Uart::Driver *driver) { /* TODO */ }
} driver_factory;
enum { STACK_SIZE = 2*1024*sizeof(addr_t) };
static Cap_connection cap;
static Rpc_entrypoint ep(&cap, STACK_SIZE, "uart_ep");
static Uart::Root uart_root(&ep, env()->heap(), driver_factory);
env()->parent()->announce(ep.manage(&uart_root));
sleep_forever();
return 0;
}

5
repos/os/src/drivers/uart/kdb/target.inc
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@ -1,7 +1,6 @@
TARGET = kdb_uart_drv
SRC_CC = main.cc
LIBS = base config
INC_DIR += $(REP_DIR)/src/drivers/uart $(REP_DIR)/src/drivers/uart/kdb
INC_DIR += $(PRG_DIR)/../.. $(PRG_DIR)/../../..
vpath main.cc $(PRG_DIR)/../..
vpath main.cc $(REP_DIR)/src/drivers/uart

130
repos/os/src/drivers/uart/kdb/uart_driver.h Normal file
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@ -0,0 +1,130 @@
/*
* \brief Fiasco(.OC) KDB UART driver
* \author Christian Prochaska
* \date 2013-03-07
*/
/*
* Copyright (C) 2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _KDB_UART_H_
#define _KDB_UART_H_
/* Fiasco.OC includes */
namespace Fiasco {
#include <l4/sys/kdebug.h>
}
/* Genode includes */
#include <base/signal.h>
#include <timer_session/connection.h>
using namespace Genode;
namespace Uart {
class Driver;
struct Driver_factory;
struct Char_avail_functor;
};
/**
* Functor, called by 'Driver' when data is ready for reading
*/
struct Uart::Char_avail_functor
{
Genode::Signal_context_capability sigh;
void operator ()() {
if (sigh.valid()) Genode::Signal_transmitter(sigh).submit();
else Genode::error("no sigh"); }
};
class Uart::Driver
{
private:
signed char _buffered_char;
Char_avail_functor &_char_avail;
Timer::Connection _timer;
Signal_handler<Driver> _timer_handler;
void _timeout() { if (char_avail()) _char_avail(); }
public:
Driver(Genode::Env &env, unsigned, unsigned,
Uart::Char_avail_functor &func)
: _buffered_char(-1),
_char_avail(func),
_timer(env),
_timer_handler(env.ep(), *this, &Driver::_timeout)
{
_timer.sigh(_timer_handler);
_timer.trigger_periodic(20*1000);
}
/***************************
** UART driver interface **
***************************/
void put_char(char c) { Fiasco::outchar(c); }
bool char_avail()
{
if (_buffered_char == -1)
_buffered_char = Fiasco::l4kd_inchar();
return (_buffered_char != -1);
}
char get_char()
{
char result;
if (_buffered_char != -1) {
result = _buffered_char;
_buffered_char = -1;
} else
result = 0;
return result;
}
void baud_rate(int bits_per_second) { }
};
/**
* Factory used by 'Uart::Root' at session creation/destruction time
*/
struct Uart::Driver_factory
{
struct Not_available {};
enum { UARTS_NUM = 1 };
Genode::Env &env;
Genode::Heap &heap;
Driver *drivers[UARTS_NUM] { nullptr };
Driver_factory(Genode::Env &env, Genode::Heap &heap)
: env(env), heap(heap) {}
Uart::Driver &create(unsigned index, unsigned baudrate,
Uart::Char_avail_functor &callback);
void destroy(Uart::Driver *driver) { /* TODO */ }
};
#endif /* _KDB_UART_H_ */

52
repos/os/src/drivers/uart/main.cc Normal file
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@ -0,0 +1,52 @@
/*
* \brief Driver for UART devices
* \author Stefan Kalkowski <stefan.kalkowski@genode-labs.com>
* \date 2013-06-05
*/
/*
* Copyright (C) 2013-2016 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
/* Genode includes */
#include <base/heap.h>
#include <base/log.h>
#include <os/attached_io_mem_dataspace.h>
/* local includes */
#include <uart_component.h>
struct Main
{
Genode::Env &env;
Genode::Heap heap { env.ram(), env.rm() };
Uart::Driver_factory factory { env, heap };
Uart::Root uart_root { env, heap, factory };
Main(Genode::Env &env) : env(env)
{
Genode::log("--- UART driver started ---");
env.parent().announce(env.ep().manage(uart_root));
}
};
namespace Component {
Genode::size_t stack_size() { return 2048*sizeof(Genode::addr_t); }
void construct(Genode::Env &env) { static Main uart_drv(env); }
}
Uart::Driver & Uart::Driver_factory::create(unsigned index, unsigned baudrate,
Uart::Char_avail_functor &functor)
{
if (index >= UARTS_NUM) throw Not_available();
if (!drivers[index])
drivers[index] = new (&heap) Driver(env, index, baudrate, functor);
return *drivers[index];
}

73
repos/os/src/drivers/uart/spec/exynos5/exynos5_uart.h
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@ -1,73 +0,0 @@
/*
* \brief Driver for EXYNOS5 UARTs
* \author Stefan Kalkowski <stefan.kalkowski@genode-labs.com>
* \author Ivan Loskutov <ivan.loskutov@ksyslabs.org>
* \date 2013-06-05
*/
/*
* Copyright (C) 2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _EXYNOS_UART_H_
#define _EXYNOS_UART_H_
/* Genode includes */
#include <base/env.h>
#include <base/printf.h>
#include <os/irq_activation.h>
#include <os/attached_io_mem_dataspace.h>
#include <drivers/uart_base.h>
/* local includes */
#include "uart_driver.h"
class Exynos_uart : public Genode::Exynos_uart_base,
public Uart::Driver,
public Genode::Irq_handler
{
private:
Uart::Char_avail_callback &_char_avail_callback;
Genode::Irq_activation _irq_activation;
public:
/**
* Constructor
*/
Exynos_uart(Genode::Attached_io_mem_dataspace *uart_mmio, int irq_number,
unsigned baud_rate, Uart::Char_avail_callback &callback)
: Exynos_uart_base((Genode::addr_t)uart_mmio->local_addr<void>(),
Genode::Board_base::UART_2_CLOCK, baud_rate),
_char_avail_callback(callback),
_irq_activation(irq_number, *this, sizeof(Genode::addr_t) * 1024) {
_rx_enable(); }
/***************************
** IRQ handler interface **
***************************/
void handle_irq(int irq_number)
{
/* inform client about the availability of data */
_char_avail_callback();
}
/***************************
** UART driver interface **
***************************/
void put_char(char c) { Exynos_uart_base::put_char(c); }
bool char_avail() { return _rx_avail(); }
char get_char() { return _rx_char(); }
void baud_rate(int bits_per_second) {}
};
#endif /* _EXYNOS_UART_H_ */

92
repos/os/src/drivers/uart/spec/exynos5/main.cc
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@ -1,92 +0,0 @@
/*
* \brief Driver for Exynos5 UART
* \author Stefan Kalkowski <stefan.kalkowski@genode-labs.com>
* \date 2013-06-05
*/
/*
* Copyright (C) 2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
/* Genode includes */
#include <base/log.h>
#include <base/sleep.h>
#include <os/config.h>
#include <cap_session/connection.h>
#include <os/attached_io_mem_dataspace.h>
#include <uart_defs.h>
/* local includes */
#include "exynos5_uart.h"
#include "uart_component.h"
int main(int argc, char **argv)
{
using namespace Genode;
log("--- Exynos5 UART driver started ---");
/**
* Factory used by 'Terminal::Root' at session creation/destruction time
*/
struct Exynos_uart_driver_factory : Uart::Driver_factory
{
Exynos_uart *created[UARTS_NUM];
/**
* Constructor
*/
Exynos_uart_driver_factory()
{
for (unsigned i = 0; i < UARTS_NUM; i++)
created[i] = 0;
}
Uart::Driver *create(unsigned index, unsigned baudrate,
Uart::Char_avail_callback &callback)
{
if (index >= UARTS_NUM)
throw Uart::Driver_factory::Not_available();
if (baudrate == 0)
{
warning("Baudrate is not defined. Use default 115200");
baudrate = BAUD_115200;
}
Exynos_uart_cfg *cfg = &exynos_uart_cfg[index];
Exynos_uart *uart = created[index];
Genode::Attached_io_mem_dataspace *uart_mmio = new (env()->heap())
Genode::Attached_io_mem_dataspace(cfg->mmio_base, cfg->mmio_size);
if (!uart) {
uart = new (env()->heap())
Exynos_uart(uart_mmio, cfg->irq_number, baudrate, callback);
/* update 'created' table */
created[index] = uart;
}
return uart;
}
void destroy(Uart::Driver *driver) { /* TODO */ }
} driver_factory;
enum { STACK_SIZE = 0x2000 };
static Cap_connection cap;
static Rpc_entrypoint ep(&cap, STACK_SIZE, "uart_ep");
static Uart::Root uart_root(&ep, env()->heap(), driver_factory);
env()->parent()->announce(ep.manage(&uart_root));
sleep_forever();
return 0;
}

5
repos/os/src/drivers/uart/spec/exynos5/target.mk
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@ -1,6 +1,3 @@
TARGET = uart_drv
REQUIRES = exynos5
SRC_CC = main.cc
LIBS = base config
INC_DIR += $(PRG_DIR) $(REP_DIR)/src/drivers/uart
include $(REP_DIR)/src/drivers/uart/target.inc

89
repos/os/src/drivers/uart/spec/exynos5/uart_driver.h Normal file
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@ -0,0 +1,89 @@
/*
* \brief Driver for EXYNOS5 UARTs
* \author Stefan Kalkowski <stefan.kalkowski@genode-labs.com>
* \author Ivan Loskutov <ivan.loskutov@ksyslabs.org>
* \date 2013-06-05
*/
/*
* Copyright (C) 2013-2016 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _UART_DRIVER_H_
#define _UART_DRIVER_H_
/* Genode includes */
#include <base/attached_io_mem_dataspace.h>
#include <base/env.h>
#include <drivers/uart_base.h>
#include <drivers/board_base.h>
enum { UARTS_NUM = 2 }; /* needed by base class definitions */
/* local includes */
#include <uart_driver_base.h>
class Uart::Driver : public Genode::Attached_io_mem_dataspace,
public Genode::Exynos_uart_base,
public Uart::Driver_base
{
private:
enum { BAUD_115200 = 115200 };
struct Uart {
Genode::addr_t mmio_base;
Genode::size_t mmio_size;
int irq_number;
};
Uart & _config(unsigned index)
{
using namespace Genode;
static Uart cfg[UARTS_NUM] = {
/*
* temporary workaround having first UART twice
* (most run-scripts have first UART reserved for the kernel)
*/
{ Board_base::UART_2_MMIO_BASE, 4096, Board_base::UART_2_IRQ },
{ Board_base::UART_2_MMIO_BASE, 4096, Board_base::UART_2_IRQ },
};
return cfg[index];
}
unsigned _baud_rate(unsigned baud_rate)
{
if (baud_rate != BAUD_115200)
Genode::warning("baud_rate ", baud_rate,
" not supported, set to default");
return BAUD_115200;
}
public:
Driver(Genode::Env &env, unsigned index,
unsigned baud_rate, Char_avail_functor &func)
: Genode::Attached_io_mem_dataspace(env, _config(index).mmio_base,
_config(index).mmio_size),
Exynos_uart_base((Genode::addr_t)local_addr<void>(),
Genode::Board_base::UART_2_CLOCK,
_baud_rate(baud_rate)),
Driver_base(env, _config(index).irq_number, func) {
_rx_enable(); }
/***************************
** UART driver interface **
***************************/
void put_char(char c) override { Exynos_uart_base::put_char(c); }
bool char_avail() override { return _rx_avail(); }
char get_char() override { return _rx_char(); }
};
#endif /* _UART_DRIVER_H_ */

109
repos/os/src/drivers/uart/spec/i8250/main.cc
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@ -1,109 +0,0 @@
/*
* \brief Driver for PC UARTs
* \author Norman Feske
* \date 2011-09-12
*/
/*
* Copyright (C) 2011-2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#include <base/log.h>
#include <base/sleep.h>
#include <os/config.h>
#include <cap_session/connection.h>
#include "i8250.h"
#include "uart_component.h"
int main(int argc, char **argv)
{
using namespace Genode;
log("--- i8250 UART driver started ---");
/**
* Factory used by 'Uart::Root' at session creation/destruction time
*/
struct I8250_driver_factory : Uart::Driver_factory
{
enum { UART_NUM = 4 };
I8250 *created[UART_NUM];
/**
* Return I/O port base for specified UART
*/
static unsigned io_port_base(int index)
{
unsigned port_base[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 };
return port_base[index & 0x3];
}
/**
* Return irq number for specified UART
*/
static int irq_number(int index)
{
int irq[] = { 4, 3, 4, 3 };
return irq[index & 0x3];
}
/**
* Constructor
*/
I8250_driver_factory()
{
for (unsigned i = 0; i < UART_NUM; i++)
created[i] = 0;
}
Uart::Driver *create(unsigned index, unsigned baudrate,
Uart::Char_avail_callback &callback)
{
/*
* We assume the underlying kernel uses UART0 and, therefore, start at
* index 1 for the user-level driver.
*/
if (index < 1 || index >= UART_NUM)
throw Uart::Driver_factory::Not_available();
enum { BAUD = 115200 };
if (baudrate == 0)
{
warning("Baudrate is not defined. Use default 115200");
baudrate = BAUD;
}
I8250 *uart = created[index];
if (!uart) {
uart = new (env()->heap())
I8250(io_port_base(index), irq_number(index),
baudrate, callback);
/* update 'created' table */
created[index] = uart;
}
return uart;
}
void destroy(Uart::Driver *driver) { /* TODO */ }
} driver_factory;
enum { STACK_SIZE = 0x2000 };
static Cap_connection cap;
static Rpc_entrypoint ep(&cap, STACK_SIZE, "uart_ep");
static Uart::Root uart_root(&ep, env()->heap(), driver_factory);
env()->parent()->announce(ep.manage(&uart_root));
sleep_forever();
return 0;
}

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/*
* \brief Driver for OMAP4 UARTs
* \author Ivan Loskutov <ivan.loskutov@ksyslabs.org>
* \date 2012-11-08
*/
/*
* Copyright (C) 2012 Ksys Labs LLC
* Copyright (C) 2011-2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
/* Genode includes */
#include <base/log.h>
#include <base/sleep.h>
#include <os/config.h>
#include <cap_session/connection.h>
#include <os/attached_io_mem_dataspace.h>
#include <uart_defs.h>
/* local includes */
#include "omap_uart.h"
#include "uart_component.h"
int main(int argc, char **argv)
{
using namespace Genode;
log("--- OMAP4 UART driver started ---");
/**
* Factory used by 'Terminal::Root' at session creation/destruction time
*/
struct Omap_uart_driver_factory : Uart::Driver_factory
{
Omap_uart *created[UARTS_NUM];
/**
* Constructor
*/
Omap_uart_driver_factory()
{
for (unsigned i = 0; i < UARTS_NUM; i++)
created[i] = 0;
}
Uart::Driver *create(unsigned index, unsigned baudrate,
Uart::Char_avail_callback &callback)
{
if (index > UARTS_NUM)
throw Uart::Driver_factory::Not_available();
if (baudrate == 0)
{
warning("Baudrate is not defined. Use default 115200");
baudrate = BAUD_115200;
}
Omap_uart_cfg *cfg = &omap_uart_cfg[index];
Omap_uart *uart = created[index];
Genode::Attached_io_mem_dataspace *uart_mmio = new (env()->heap())
Genode::Attached_io_mem_dataspace(cfg->mmio_base, cfg->mmio_size);
if (!uart) {
uart = new (env()->heap())
Omap_uart(uart_mmio, cfg->irq_number, baudrate, callback);
/* update 'created' table */
created[index] = uart;
}
return uart;
}
void destroy(Uart::Driver *driver) { /* TODO */ }
} driver_factory;
enum { STACK_SIZE = 0x2000 };
static Cap_connection cap;
static Rpc_entrypoint ep(&cap, STACK_SIZE, "uart_ep");
static Uart::Root uart_root(&ep, env()->heap(), driver_factory);
env()->parent()->announce(ep.manage(&uart_root));
sleep_forever();
return 0;
}

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/*
* \brief Driver for OMAP4 UARTs
* \author Ivan Loskutov <ivan.loskutov@ksyslabs.org>
* \date 2012-11-08
*/
/*
* Copyright (C) 2012 Ksys Labs LLC
* Copyright (C) 2011-2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _DRIVERS__UART__SPEC__OMAP4__OMAP_UART_H_
#define _DRIVERS__UART__SPEC__OMAP4__OMAP_UART_H_
/* Genode includes */
#include <base/env.h>
#include <base/printf.h>
#include <os/irq_activation.h>
#include <os/attached_io_mem_dataspace.h>
#include <drivers/uart_base.h>
/* local includes */
#include "uart_driver.h"
class Omap_uart : public Genode::Tl16c750_base, public Uart::Driver, public Genode::Irq_handler
{
private:
Genode::Attached_io_mem_dataspace &_uart_mmio;
Uart::Char_avail_callback &_char_avail_callback;
enum { IRQ_STACK_SIZE = 4096 };
Genode::Irq_activation _irq_activation;
void _enable_rx_interrupt()
{
/* enable access to 'Uart_fcr' and 'Uart_ier' */
write<Uart_lcr::Reg_mode>(Uart_lcr::Reg_mode::OPERATIONAL);
/* enable rx interrupt, disable other interrupts and sleep mode */
write<Uart_ier>(Uart_ier::Rhr_it::bits(1)
| Uart_ier::Thr_it::bits(0)
| Uart_ier::Line_sts_it::bits(0)
| Uart_ier::Modem_sts_it::bits(0)
| Uart_ier::Sleep_mode::bits(0)
| Uart_ier::Xoff_it::bits(0)
| Uart_ier::Rts_it::bits(0)
| Uart_ier::Cts_it::bits(0));
/*
* Configure protocol formatting and thereby return to
* operational mode.
*/
write<Uart_lcr>(Uart_lcr::Char_length::bits(Uart_lcr::Char_length::_8_BIT)
| Uart_lcr::Nb_stop::bits(Uart_lcr::Nb_stop::_1_STOP_BIT)
| Uart_lcr::Parity_en::bits(0)
| Uart_lcr::Break_en::bits(0)
| Uart_lcr::Div_en::bits(0));
}
public:
/**
* Constructor
*/
Omap_uart(Genode::Attached_io_mem_dataspace *uart_mmio, int irq_number,
unsigned baud_rate, Uart::Char_avail_callback &callback)
:
Tl16c750_base((Genode::addr_t)uart_mmio->local_addr<void>(), Genode::Board_base::TL16C750_CLOCK, baud_rate),
_uart_mmio(*uart_mmio),
_char_avail_callback(callback),
_irq_activation(irq_number, *this, IRQ_STACK_SIZE)
{
_enable_rx_interrupt();
}
/**
* * IRQ handler interface **
*/
void handle_irq(int irq_number)
{
/* inform client about the availability of data */
unsigned int iir = read<Uart_iir::It_pending>();
if (iir) return;
_char_avail_callback();
}
/**
* * UART driver interface **
*/
void put_char(char c) { Tl16c750_base::put_char(c); }
bool char_avail() { return read<Uart_lsr::Rx_fifo_empty>(); }
char get_char() { return read<Uart_rhr::Rhr>(); }
void baud_rate(int bits_per_second)
{
_init(Genode::Board_base::TL16C750_CLOCK, bits_per_second);
_enable_rx_interrupt();
}
};
#endif /* _DRIVERS__UART__SPEC__OMAP4__OMAP_UART_H_ */

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TARGET = uart_drv
REQUIRES = omap4
SRC_CC = main.cc
LIBS = base config
INC_DIR += $(PRG_DIR) $(REP_DIR)/src/drivers/uart

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REQUIRES = panda
include $(REP_DIR)/src/drivers/uart/target.inc

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/*
* \brief Driver for OMAP4 UARTs
* \author Ivan Loskutov
* \author Stefan Kalkowski
* \date 2012-11-08
*/
/*
* Copyright (C) 2012 Ksys Labs LLC
* Copyright (C) 2011-2016 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _UART_DRIVER_H_
#define _UART_DRIVER_H_
/* Genode includes */
#include <base/attached_io_mem_dataspace.h>
#include <base/env.h>
#include <drivers/uart_base.h>
#include <spec/panda/drivers/board_base.h>
enum { UARTS_NUM = 4 }; /* needed by base class definitions */
/* local includes */
#include <uart_driver_base.h>
class Uart::Driver : public Genode::Attached_io_mem_dataspace,
public Genode::Tl16c750_base,
public Uart::Driver_base
{
private:
void _enable_rx_interrupt()
{
/* enable access to 'Uart_fcr' and 'Uart_ier' */
write<Uart_lcr::Reg_mode>(Uart_lcr::Reg_mode::OPERATIONAL);
/* enable rx interrupt, disable other interrupts and sleep mode */
write<Uart_ier>(Uart_ier::Rhr_it::bits(1)
| Uart_ier::Thr_it::bits(0)
| Uart_ier::Line_sts_it::bits(0)
| Uart_ier::Modem_sts_it::bits(0)
| Uart_ier::Sleep_mode::bits(0)
| Uart_ier::Xoff_it::bits(0)
| Uart_ier::Rts_it::bits(0)
| Uart_ier::Cts_it::bits(0));
/*
* Configure protocol formatting and thereby return to
* operational mode.
*/
write<Uart_lcr>(Uart_lcr::Char_length::bits(Uart_lcr::Char_length::_8_BIT)
| Uart_lcr::Nb_stop::bits(Uart_lcr::Nb_stop::_1_STOP_BIT)
| Uart_lcr::Parity_en::bits(0)
| Uart_lcr::Break_en::bits(0)
| Uart_lcr::Div_en::bits(0));
}
enum { BAUD_115200 = 115200 };
struct Uart {
Genode::addr_t mmio_base;
Genode::size_t mmio_size;
int irq_number;
};
Uart & _config(unsigned index)
{
using namespace Genode;
static Uart cfg[UARTS_NUM] = {
{ Board_base::TL16C750_1_MMIO_BASE, Board_base::TL16C750_MMIO_SIZE,
Board_base::TL16C750_1_IRQ },
{ Board_base::TL16C750_2_MMIO_BASE, Board_base::TL16C750_MMIO_SIZE,
Board_base::TL16C750_2_IRQ },
{ Board_base::TL16C750_3_MMIO_BASE, Board_base::TL16C750_MMIO_SIZE,
Board_base::TL16C750_3_IRQ },
{ Board_base::TL16C750_4_MMIO_BASE, Board_base::TL16C750_MMIO_SIZE,
Board_base::TL16C750_4_IRQ },
};
return cfg[index];
}
unsigned _baud_rate(unsigned baud_rate)
{
if (baud_rate != 0) return baud_rate;
Genode::warning("baud_rate ", baud_rate,
" not supported, set to default");
return BAUD_115200;
}
public:
Driver(Genode::Env &env, unsigned index,
unsigned baud_rate, Char_avail_functor &func)
: Genode::Attached_io_mem_dataspace(env, _config(index).mmio_base,
_config(index).mmio_size),
Tl16c750_base((Genode::addr_t)local_addr<void>(),
Genode::Board_base::TL16C750_CLOCK,
_baud_rate(baud_rate)),
Driver_base(env, _config(index).irq_number, func) {
_enable_rx_interrupt(); }
/***************************
** UART driver interface **
***************************/
void handle_irq() override
{
/* check for interrupt */
unsigned int iir = read<Uart_iir::It_pending>();
if (iir) return;
/* inform client about the availability of data */
Driver_base::handle_irq();
}
void put_char(char c) override { Tl16c750_base::put_char(c); }
bool char_avail() override { return read<Uart_lsr::Rx_fifo_empty>(); }
char get_char() override { return read<Uart_rhr::Rhr>(); }
void baud_rate(int bits_per_second) override
{
_init(Genode::Board_base::TL16C750_CLOCK, bits_per_second);
_enable_rx_interrupt();
}
};
#endif /* _UART_DRIVER_H_ */

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REQUIRES = pbxa9
include $(REP_DIR)/src/drivers/uart/target.inc

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/*
* \brief Pbxa9 UART driver
* \author Christian Helmuth
* \author Stefan Kalkowski
* \date 2011-05-27
*/
/*
* Copyright (C) 2011-2016 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _UART_DRIVER_H_
#define _UART_DRIVER_H_
/* Genode includes */
#include <base/attached_io_mem_dataspace.h>
#include <base/env.h>
#include <drivers/board_base.h>
enum { UARTS_NUM = 4 }; /* needed by base class definitions */
/* local includes */
#include <uart_driver_base.h>
class Uart::Driver : public Genode::Attached_io_mem_dataspace,
public Uart::Driver_base
{
private:
enum {
/**
* MMIO regions
*/
PL011_PHYS0 = 0x10009000, /* base for UART 0 */
PL011_PHYS1 = 0x1000a000, /* base for UART 1 */
PL011_PHYS2 = 0x1000b000, /* base for UART 2 */
PL011_PHYS3 = 0x1000c000, /* base for UART 3 */
PL011_SIZE = 0x1000, /* size of each MMIO region */
/**
* Interrupt lines
*/
PL011_IRQ0 = Genode::Board_base::PL011_0_IRQ, /* UART 0 */
PL011_IRQ1 = Genode::Board_base::PL011_1_IRQ, /* UART 1 */
PL011_IRQ2 = Genode::Board_base::PL011_2_IRQ, /* UART 2 */
PL011_IRQ3 = Genode::Board_base::PL011_3_IRQ, /* UART 3 */
/**
* UART baud rate configuration (precalculated)
*
* div = 24000000 / 16 / baud rate
* IBRD = floor(div)
* FBRD = floor((div - IBRD) * 64 + 0.5)
*/
PL011_IBRD_115200 = 13, PL011_FBRD_115200 = 1,
PL011_IBRD_19200 = 78, PL011_FBRD_19200 = 8,
PL011_IBRD_9600 = 156, PL011_FBRD_9600 = 16,
BAUD_115200 = 115200
};
struct Uart {
Genode::addr_t mmio_base;
Genode::size_t mmio_size;
int irq_number;
};
Uart & _config(unsigned index)
{
using namespace Genode;
static Uart cfg[UARTS_NUM] = {
{ PL011_PHYS0, PL011_SIZE, PL011_IRQ0 },
{ PL011_PHYS1, PL011_SIZE, PL011_IRQ1 },
{ PL011_PHYS2, PL011_SIZE, PL011_IRQ2 },
{ PL011_PHYS3, PL011_SIZE, PL011_IRQ3 },
};
return cfg[index];
}
/*
* Constants for flags, registers, etc. only visible in this file are
* named as in the specification documents to relieve correlation
* between implementation and specification.
*/
/**
* Register offsets
*
* Registers are read/writable unless explicitly stated.
*/
enum Register {
UARTDR = 0x000, /* data */
UARTFR = 0x018, /* flags (read-only) */
UARTIBRD = 0x024, /* integer baud rate divisor */
UARTFBRD = 0x028, /* fractional baud rate divisor */
UARTLCR_H = 0x02c, /* line control */
UARTCR = 0x030, /* control */
UARTIMSC = 0x038, /* interrupt mask register */
UARTICR = 0x044, /* interrupt clear register */
};
/**
* Flags
*/
enum Flag {
/* flag register */
UARTFR_BUSY = 0x0008, /* busy on tx */
UARTFR_TXFF = 0x0020, /* tx FIFO full */
UARTFR_RXFE = 0x0010, /* rx FIFO empty */
/* line control register */
UARTLCR_H_FEN = 0x0010, /* enable FIFOs */
UARTLCR_H_WLEN_8 = 0x0060, /* 8 bit word length */
/* control register */
UARTCR_UARTEN = 0x0001, /* enable uart */
UARTCR_TXE = 0x0100, /* enable tx */
UARTCR_RXE = 0x0200, /* enable rx */
/* interrupt mask register */
UARTIMSC_RXIM = 0x10, /* rx interrupt mask */
/* interrupt clear register */
UARTICR_RXIC = 0x10, /* rx interrupt clear */
};
Genode::uint32_t volatile *_base;
Genode::uint32_t _read_reg(Register reg) const {
return _base[reg >> 2]; }
void _write_reg(Register reg, Genode::uint32_t v) {
_base[reg >> 2] = v; }
public:
Driver(Genode::Env &env, unsigned index,
unsigned baud_rate, Char_avail_functor &func)
: Genode::Attached_io_mem_dataspace(env, _config(index).mmio_base,
_config(index).mmio_size),
Driver_base(env, _config(index).irq_number, func),
_base(local_addr<unsigned volatile>())
{
if (baud_rate != BAUD_115200)
Genode::warning("baud_rate ", baud_rate,
" not supported, set to default");
/* disable and flush uart */
_write_reg(UARTCR, 0);
while (_read_reg(UARTFR) & UARTFR_BUSY) ;
_write_reg(UARTLCR_H, 0);
/* set baud-rate divisor */
_write_reg(UARTIBRD, PL011_IBRD_115200);
_write_reg(UARTFBRD, PL011_FBRD_115200);
/* enable FIFOs, 8-bit words */
_write_reg(UARTLCR_H, UARTLCR_H_FEN | UARTLCR_H_WLEN_8);
/* enable transmission */
_write_reg(UARTCR, UARTCR_TXE);
/* enable uart */
_write_reg(UARTCR, _read_reg(UARTCR) | UARTCR_UARTEN);
/* enable rx interrupt */
_write_reg(UARTIMSC, UARTIMSC_RXIM);
}
/***************************
** UART driver interface **
***************************/
void handle_irq() override
{
/* inform client about the availability of data */
Driver_base::handle_irq();
/* acknowledge irq */
_write_reg(UARTICR, UARTICR_RXIC);
}
void put_char(char c) override
{
/* spin while FIFO full */
while (_read_reg(UARTFR) & UARTFR_TXFF) ;
_write_reg(UARTDR, c);
}
bool char_avail() override {
return !(_read_reg(UARTFR) & UARTFR_RXFE); }
char get_char() override {
return _read_reg(UARTDR); }
};
#endif /* _UART_DRIVER_H_ */

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#!/usr/bin/python
from math import floor
clock = 24000000
bauds = [ 9600, 14400, 19200, 38400, 115200 ]
print "Clock Desired IBRD FBRD Real"
print " MHz baud rate baud rate"
for baud in bauds:
div = clock / 16.0 / baud
ibrd = int(floor(div))
fbrd = int(floor((div - ibrd) * 64 + 0.5))
baud_ = clock / 16.0 / (ibrd + fbrd / 64.0)
print "% 4d % 8d % 4d % 3d % 10.2f" % (clock / 1000000, baud, ibrd, fbrd, baud_)

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/*
* \brief Driver for PL011 UARTs
* \author Christian Helmuth
* \date 2011-05-30
*/
/*
* Copyright (C) 2011-2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
/* Genode includes */
#include <base/log.h>
#include <base/sleep.h>
#include <pl011_defs.h>
#include <os/config.h>
#include <cap_session/connection.h>
/* local includes */
#include "pl011.h"
#include "uart_component.h"
int main(int argc, char **argv)
{
using namespace Genode;
log("--- PL011 UART driver started ---");
/**
* Factory used by 'Uart::Root' at session creation/destruction time
*/
struct Pl011_driver_factory : Uart::Driver_factory
{
Pl011 *created[PL011_NUM];
/**
* Constructor
*/
Pl011_driver_factory()
{
for (unsigned i = 0; i < PL011_NUM; i++)
created[i] = 0;
}
Uart::Driver *create(unsigned index, unsigned /* baudrate */,
Uart::Char_avail_callback &callback)
{
warning("Setting baudrate is not supported yet. Use default 115200.");
/*
* We assume the underlying kernel uses UART0 and, therefore, start at
* index 1 for the user-level driver.
*/
if (index < 1 || index >= PL011_NUM)
throw Uart::Driver_factory::Not_available();
Pl011_uart *cfg = &pl011_uart[index];
Pl011 *uart = created[index];
if (!uart) {
uart = new (env()->heap())
Pl011(cfg->mmio_base, cfg->mmio_size,
PL011_IBRD_115200, PL011_FBRD_115200,
cfg->irq_number, callback);
/* update 'created' table */
created[index] = uart;
}
return uart;
}
void destroy(Uart::Driver *driver) { /* TODO */ }
} driver_factory;
enum { STACK_SIZE = 0x2000 };
static Cap_connection cap;
static Rpc_entrypoint ep(&cap, STACK_SIZE, "uart_ep");
static Uart::Root uart_root(&ep, env()->heap(), driver_factory);
env()->parent()->announce(ep.manage(&uart_root));
sleep_forever();
return 0;
}

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/*
* \brief PL011 UART driver
* \author Christian Helmuth
* \date 2011-05-27
*/
/*
* Copyright (C) 2011-2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _DRIVERS__UART__SPEC__PL011__PL011_H_
#define _DRIVERS__UART__SPEC__PL011__PL011_H_
/* Genode includes */
#include <base/env.h>
#include <base/lock.h>
#include <base/printf.h>
#include <os/irq_activation.h>
#include <os/attached_io_mem_dataspace.h>
/* local includes */
#include "uart_driver.h"
class Pl011 : public Uart::Driver, public Genode::Irq_handler
{
private:
/*
* Constants for flags, registers, etc. only visible in this file are
* named as in the specification documents to relieve correlation
* between implementation and specification.
*/
/**
* Register offsets
*
* Registers are read/writable unless explicitly stated.
*/
enum Register {
UARTDR = 0x000, /* data */
UARTFR = 0x018, /* flags (read-only) */
UARTIBRD = 0x024, /* integer baud rate divisor */
UARTFBRD = 0x028, /* fractional baud rate divisor */
UARTLCR_H = 0x02c, /* line control */
UARTCR = 0x030, /* control */
UARTIMSC = 0x038, /* interrupt mask register */
UARTICR = 0x044, /* interrupt clear register */
};
/**
* Flags
*/
enum Flag {
/* flag register */
UARTFR_BUSY = 0x0008, /* busy on tx */
UARTFR_TXFF = 0x0020, /* tx FIFO full */
UARTFR_RXFE = 0x0010, /* rx FIFO empty */
/* line control register */
UARTLCR_H_FEN = 0x0010, /* enable FIFOs */
UARTLCR_H_WLEN_8 = 0x0060, /* 8 bit word length */
/* control register */
UARTCR_UARTEN = 0x0001, /* enable uart */
UARTCR_TXE = 0x0100, /* enable tx */
UARTCR_RXE = 0x0200, /* enable rx */
/* interrupt mask register */
UARTIMSC_RXIM = 0x10, /* rx interrupt mask */
/* interrupt clear register */
UARTICR_RXIC = 0x10, /* rx interrupt clear */
};
Genode::Attached_io_mem_dataspace _io_mem;
Genode::uint32_t volatile *_base;
Uart::Char_avail_callback &_char_avail_callback;
enum { IRQ_STACK_SIZE = 4096 };
Genode::Irq_activation _irq_activation;
Genode::uint32_t _read_reg(Register reg) const
{
return _base[reg >> 2];
}
void _write_reg(Register reg, Genode::uint32_t v)
{
_base[reg >> 2] = v;
}
public:
/**
* Constructor
*/
Pl011(Genode::addr_t mmio_base, Genode::size_t mmio_size,
unsigned ibrd, unsigned fbrd, int irq_number,
Uart::Char_avail_callback &callback)
:
_io_mem(mmio_base, mmio_size),
_base(_io_mem.local_addr<unsigned volatile>()),
_char_avail_callback(callback),
_irq_activation(irq_number, *this, IRQ_STACK_SIZE)
{
/* disable and flush uart */
_write_reg(UARTCR, 0);
while (_read_reg(UARTFR) & UARTFR_BUSY) ;
_write_reg(UARTLCR_H, 0);
/* set baud-rate divisor */
_write_reg(UARTIBRD, ibrd);
_write_reg(UARTFBRD, fbrd);
/* enable FIFOs, 8-bit words */
_write_reg(UARTLCR_H, UARTLCR_H_FEN | UARTLCR_H_WLEN_8);
/* enable transmission */
_write_reg(UARTCR, UARTCR_TXE);
/* enable uart */
_write_reg(UARTCR, _read_reg(UARTCR) | UARTCR_UARTEN);
/* enable rx interrupt */
_write_reg(UARTIMSC, UARTIMSC_RXIM);
}
/***************************
** IRQ handler interface **
***************************/
void handle_irq(int irq_number)
{
/* inform client about the availability of data */
_char_avail_callback();
/* acknowledge irq */
_write_reg(UARTICR, UARTICR_RXIC);
}
/***************************
** UART driver interface **
***************************/
void put_char(char c)
{
/* spin while FIFO full */
while (_read_reg(UARTFR) & UARTFR_TXFF) ;
_write_reg(UARTDR, c);
}
bool char_avail()
{
return !(_read_reg(UARTFR) & UARTFR_RXFE);
}
char get_char()
{
return _read_reg(UARTDR);
}
};
#endif /* _DRIVERS__UART__SPEC__PL011__PL011_H_ */

6
repos/os/src/drivers/uart/spec/pl011/target.mk
View File

@ -1,6 +0,0 @@
TARGET = uart_drv
REQUIRES = pl011
SRC_CC = main.cc
LIBS = base config
INC_DIR += $(PRG_DIR) $(REP_DIR)/src/drivers/uart

3
repos/os/src/drivers/uart/spec/x86/target.mk Normal file
View File

@ -0,0 +1,3 @@
REQUIRES = x86
include $(REP_DIR)/src/drivers/uart/target.inc

88
repos/os/src/drivers/uart/spec/i8250/i8250.h → repos/os/src/drivers/uart/spec/x86/uart_driver.h
View File

@ -1,38 +1,55 @@
/*
* \brief i8250 UART driver
* \author Norman Feske
* \author Stefan Kalkowski
* \date 2011-09-12
*/
/*
* Copyright (C) 2011-2013 Genode Labs GmbH
* Copyright (C) 2011-2016 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _DRIVERS__UART__SPEC__I8250__I8250_H_
#define _DRIVERS__UART__SPEC__I8250__I8250_H_
#ifndef _UART_DRIVER_H_
#define _UART_DRIVER_H_
/* Genode includes */
#include <base/env.h>
#include <base/lock.h>
#include <base/printf.h>
#include <os/irq_activation.h>
#include <io_port_session/connection.h>
enum { UARTS_NUM = 4 }; /* needed by base class definitions */
/* local includes */
#include <uart_driver.h>
#include <uart_driver_base.h>
class I8250 : public Uart::Driver, public Genode::Irq_handler
class Uart::Driver : public Uart::Driver_base
{
private:
unsigned _port_base;
Genode::Io_port_connection _io_port;
/**
* Return I/O port base for specified UART
*/
static unsigned _io_port_base(int index)
{
static unsigned port_base[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 };
return port_base[index & 0x3];
}
/**
* Return irq number for specified UART
*/
static int _irq_number(int index)
{
static int irq[] = { 4, 3, 4, 3 };
Genode::log("open IRQ ", irq[index & 0x3], "\n");
return irq[index & 0x3];
}
/**
* Register offsets relative to '_port_base'
*/
@ -48,6 +65,8 @@ class I8250 : public Uart::Driver, public Genode::Irq_handler
DLHI = 1,
};
enum { BAUD_115200 = 115200 };
/**
* Read byte from i8250 register
*/
@ -84,42 +103,29 @@ class I8250 : public Uart::Driver, public Genode::Irq_handler
_inb<MSR>();
}
Uart::Char_avail_callback &_char_avail_callback;
enum { IRQ_STACK_SIZE = 4096 };
Genode::Irq_activation _irq_activation;
unsigned _baud_rate(unsigned baud_rate)
{
if (baud_rate != BAUD_115200)
Genode::warning("baud_rate ", baud_rate,
" not supported, set to default\n");
return BAUD_115200;
}
public:
/**
* Constructor
*/
I8250(unsigned port_base, int irq_number, unsigned baud,
Uart::Char_avail_callback &callback)
:
_port_base(port_base),
_io_port(port_base, 0xf),
_char_avail_callback(callback),
_irq_activation(irq_number, *this, IRQ_STACK_SIZE)
{
_init_comport(baud);
}
Driver(Genode::Env &env, unsigned index, unsigned baud,
Uart::Char_avail_functor &func)
: Driver_base(env, _irq_number(index), func),
_port_base(_io_port_base(index)),
_io_port(_port_base, 0xf) {
_init_comport(_baud_rate(baud)); }
/***************************
** IRQ handler interface **
***************************/
void handle_irq(int irq_number)
{
/* inform client about the availability of data */
_char_avail_callback();
}
/***************************
** UART driver interface **
***************************/
void put_char(char c)
void put_char(char c) override
{
/* wait until serial port is ready */
while (!(_inb<LSR>() & 0x60));
@ -128,20 +134,20 @@ class I8250 : public Uart::Driver, public Genode::Irq_handler
_outb<TRB>(c);
}
bool char_avail()
bool char_avail() override
{
return _inb<LSR>() & 1;
}
char get_char()
char get_char() override
{
return _inb<TRB>();
}
void baud_rate(int bits_per_second)
void baud_rate(int bits_per_second) override
{
_init_comport(bits_per_second);
}
};
#endif /* _DRIVERS__UART__SPEC__I8250__I8250_H_ */
#endif /* _UART_DRIVER_H_ */

5
repos/os/src/drivers/uart/spec/i8250/target.mk → repos/os/src/drivers/uart/target.inc
View File

@ -1,6 +1,7 @@
TARGET = uart_drv
REQUIRES = x86
SRC_CC = main.cc
LIBS = base config
LIBS = base
INC_DIR += $(PRG_DIR) $(REP_DIR)/src/drivers/uart
vpath main.cc $(REP_DIR)/src/drivers/uart

80
repos/os/src/drivers/uart/uart_component.h
View File

@ -1,11 +1,12 @@
/*
* \brief UART LOG component
* \author Christian Helmuth
* \author Stefan Kalkowski
* \date 2011-05-30
*/
/*
* Copyright (C) 2011-2013 Genode Labs GmbH
* Copyright (C) 2011-2016 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
@ -15,23 +16,31 @@
#define _UART_COMPONENT_H_
/* Genode includes */
#include <base/attached_ram_dataspace.h>
#include <base/attached_rom_dataspace.h>
#include <base/rpc_server.h>
#include <util/arg_string.h>
#include <os/session_policy.h>
#include <os/attached_ram_dataspace.h>
#include <root/component.h>
#include <uart_session/uart_session.h>
/* local includes */
#include "uart_driver.h"
#include <uart_driver.h>
namespace Uart {
using namespace Genode;
class Session_component : public Rpc_object<Uart::Session,
Session_component>
{
class Session_component;
class Root;
typedef Root_component<Session_component, Multiple_clients> Root_component;
};
class Uart::Session_component : public Rpc_object<Uart::Session,
Uart::Session_component>
{
private:
/*
@ -45,18 +54,7 @@ namespace Uart {
/**
* Functor informing the client about new data to read
*/
struct Char_avail_callback : Uart::Char_avail_callback
{
Genode::Signal_context_capability sigh;
void operator ()()
{
if (sigh.valid())
Genode::Signal_transmitter(sigh).submit();
}
} _char_avail_callback;
Char_avail_functor _char_avail;
Uart::Driver_factory &_driver_factory;
Uart::Driver &_driver;
@ -129,12 +127,12 @@ namespace Uart {
/**
* Constructor
*/
Session_component(Uart::Driver_factory &driver_factory,
Session_component(Env &env, Uart::Driver_factory &driver_factory,
unsigned index, unsigned baudrate, bool detect_size)
:
_io_buffer(Genode::env()->ram_session(), IO_BUFFER_SIZE),
_io_buffer(env.ram(), env.rm(), IO_BUFFER_SIZE),
_driver_factory(driver_factory),
_driver(*_driver_factory.create(index, baudrate, _char_avail_callback)),
_driver(_driver_factory.create(index, baudrate, _char_avail)),
_size(detect_size ? _detect_size() : Size(0, 0))
{ }
@ -179,10 +177,8 @@ namespace Uart {
_driver.put_char(io_buf[i]);
}
Genode::Dataspace_capability _dataspace()
{
return _io_buffer.cap();
}
Genode::Dataspace_capability _dataspace() {
return _io_buffer.cap(); }
void connected_sigh(Genode::Signal_context_capability sigh)
{
@ -196,25 +192,23 @@ namespace Uart {
void read_avail_sigh(Genode::Signal_context_capability sigh)
{
_char_avail_callback.sigh = sigh;
_char_avail.sigh = sigh;
if (_driver.char_avail())
_char_avail_callback();
if (_driver.char_avail()) _char_avail();
}
Genode::size_t read(void *, Genode::size_t) { return 0; }
Genode::size_t write(void const *, Genode::size_t) { return 0; }
};
};
typedef Root_component<Session_component, Multiple_clients> Root_component;
class Root : public Root_component
{
class Uart::Root : public Uart::Root_component
{
private:
Env &_env;
Driver_factory &_driver_factory;
Attached_rom_dataspace _config { _env, "config" };
protected:
@ -222,7 +216,7 @@ namespace Uart {
{
try {
Session_label label = label_from_args(args);
Session_policy policy(label);
Session_policy policy(label, _config.xml());
unsigned index = 0;
policy.attribute("uart").value(&index);
@ -235,7 +229,8 @@ namespace Uart {
bool detect_size = policy.attribute_value("detect_size", false);
return new (md_alloc())
Session_component(_driver_factory, index, baudrate, detect_size);
Session_component(_env, _driver_factory, index,
baudrate, detect_size);
} catch (Xml_node::Nonexistent_attribute) {
Genode::error("Missing \"uart\" attribute in policy definition");
@ -248,14 +243,9 @@ namespace Uart {
public:
/**
* Constructor
*/
Root(Rpc_entrypoint *ep, Allocator *md_alloc, Driver_factory &driver_factory)
:
Root_component(ep, md_alloc), _driver_factory(driver_factory)
{ }
};
}
Root(Env &env, Allocator &md_alloc, Driver_factory &driver_factory)
: Root_component(env.ep(), md_alloc), _env(env),
_driver_factory(driver_factory) { }
};
#endif /* _UART_COMPONENT_H_ */

84
repos/os/src/drivers/uart/uart_driver.h
View File

@ -1,84 +0,0 @@
/*
* \brief UART driver interface
* \author Christian Helmuth
* \date 2011-05-30
*/
/*
* Copyright (C) 2011-2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _UART_DRIVER_H_
#define _UART_DRIVER_H_
namespace Uart {
/**
* Functor, called by 'Driver' when data is ready for reading
*/
struct Char_avail_callback
{
virtual void operator()() { }
};
struct Driver
{
/**
* Write character to UART
*/
virtual void put_char(char c) = 0;
/**
* Return true if character is available for reading
*/
virtual bool char_avail() = 0;
/**
* Read character from UART
*/
virtual char get_char() = 0;
/**
* Set baud rate for terminal
*/
virtual void baud_rate(int /*bits_per_second*/)
{
Genode::warning("Setting baudrate is not supported yet. Use default 115200.");
}
};
/**
* Interface for constructing the driver objects
*/
struct Driver_factory
{
struct Not_available { };
/**
* Construct new driver
*
* \param index index of UART to access
* \param baudrate baudrate of UART
* \param callback functor called when data becomes available for
* reading
*
* \throws Uart_not_available
*
* Note that the 'callback' is called in the context of the IRQ
* handler. Hence, the operations performed by the registered
* function must be properly synchronized.
*/
virtual Driver *create(unsigned index, unsigned baudrate, Char_avail_callback &callback) = 0;
/**
* Destroy driver
*/
virtual void destroy(Driver *driver) = 0;
};
}
#endif /* _UART_DRIVER_H_ */

135
repos/os/src/drivers/uart/uart_driver_base.h Normal file
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@ -0,0 +1,135 @@
/*
* \brief UART driver interface
* \author Christian Helmuth
* \author Stefan Kalkowski
* \date 2011-05-30
*/
/*
* Copyright (C) 2011-2016 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _UART_DRIVER_BASE_H_
#define _UART_DRIVER_BASE_H_
#include <irq_session/connection.h>
namespace Uart {
class Driver_base;
class Driver;
struct Driver_factory;
struct Char_avail_functor;
};
/**
* Functor, called by 'Driver' when data is ready for reading
*/
struct Uart::Char_avail_functor
{
Genode::Signal_context_capability sigh;
void operator ()() {
if (sigh.valid()) Genode::Signal_transmitter(sigh).submit(); }
};
class Uart::Driver_base
{
private:
Char_avail_functor &_char_avail;
Genode::Irq_connection _irq;
Genode::Signal_handler<Driver_base> _irq_handler;
public:
Driver_base(Genode::Env &env, int irq_number, Char_avail_functor &func)
: _char_avail(func),
_irq(env, irq_number),
_irq_handler(env.ep(), *this, &Driver_base::handle_irq)
{
_irq.sigh(_irq_handler);
_irq.ack_irq();
}
virtual ~Driver_base() {}
/**
* Handle interrupt
*/
virtual void handle_irq()
{
_char_avail();
_irq.ack_irq();
}
/**
* Write character to UART
*/
virtual void put_char(char c) = 0;
/**
* Return true if character is available for reading
*/
virtual bool char_avail() = 0;
/**
* Read character from UART
*/
virtual char get_char() = 0;
/**
* Set baud rate for terminal
*/
virtual void baud_rate(int baud)
{
Genode::warning("Setting baudrate to ", baud,
" is not supported. Use default value.");
}
};
/**
* Interface for constructing the driver objects
*/
struct Uart::Driver_factory
{
struct Not_available { };
Genode::Env &env;
Genode::Heap &heap;
Driver *drivers[UARTS_NUM];
Driver_factory(Genode::Env &env, Genode::Heap &heap)
: env(env), heap(heap) {
for (unsigned i = 0; i < UARTS_NUM; i++) drivers[i] = 0; }
/**
* Construct new driver
*
* \param index index of UART to access
* \param baudrate baudrate of UART
* \param functor functor called when data becomes available for
* reading
*
* \throws Uart_not_available
*
* Note that the 'callback' is called in the context of the IRQ
* handler. Hence, the operations performed by the registered
* function must be properly synchronized.
*/
Driver &create(unsigned index, unsigned baudrate,
Char_avail_functor &functor);
/**
* Destroy driver
*/
void destroy(Driver &driver) { /* TODO */ }
};
#endif /* _UART_DRIVER_BASE_H_ */