From a2dad96ab736f66ed54421cad53caf31f250e181 Mon Sep 17 00:00:00 2001 From: Sebastian Huber Date: Mon, 23 Apr 2018 09:45:28 +0200 Subject: bsps: Move I2C drivers to bsps This patch is a part of the BSP source reorganization. Update #3285. --- c/src/lib/libbsp/powerpc/gen5200/Makefile.am | 6 +- c/src/lib/libbsp/powerpc/gen5200/i2c/i2c.c | 320 ---------- c/src/lib/libbsp/powerpc/gen5200/i2c/i2cdrv.c | 287 --------- c/src/lib/libbsp/powerpc/gen5200/i2c/mpc5200mbus.c | 673 --------------------- c/src/lib/libbsp/powerpc/gen5200/i2c/mpc5200mbus.h | 150 ----- 5 files changed, 3 insertions(+), 1433 deletions(-) delete mode 100644 c/src/lib/libbsp/powerpc/gen5200/i2c/i2c.c delete mode 100644 c/src/lib/libbsp/powerpc/gen5200/i2c/i2cdrv.c delete mode 100644 c/src/lib/libbsp/powerpc/gen5200/i2c/mpc5200mbus.c delete mode 100644 c/src/lib/libbsp/powerpc/gen5200/i2c/mpc5200mbus.h (limited to 'c/src/lib/libbsp/powerpc/gen5200') diff --git a/c/src/lib/libbsp/powerpc/gen5200/Makefile.am b/c/src/lib/libbsp/powerpc/gen5200/Makefile.am index 17d49bb96a..afa2c53b00 100644 --- a/c/src/lib/libbsp/powerpc/gen5200/Makefile.am +++ b/c/src/lib/libbsp/powerpc/gen5200/Makefile.am @@ -58,9 +58,9 @@ librtemsbsp_a_SOURCES +=../../../../../../bsps/powerpc/shared/clock/clock.c # console librtemsbsp_a_SOURCES += ../../../../../../bsps/powerpc/gen5200/console/console.c # i2c -librtemsbsp_a_SOURCES += i2c/i2c.c -librtemsbsp_a_SOURCES += i2c/i2cdrv.c -librtemsbsp_a_SOURCES += i2c/mpc5200mbus.c +librtemsbsp_a_SOURCES += ../../../../../../bsps/powerpc/gen5200/i2c/i2c.c +librtemsbsp_a_SOURCES += ../../../../../../bsps/powerpc/gen5200/i2c/i2cdrv.c +librtemsbsp_a_SOURCES += ../../../../../../bsps/powerpc/gen5200/i2c/mpc5200mbus.c # ide librtemsbsp_a_SOURCES += ide/idecfg.c librtemsbsp_a_SOURCES += ide/pcmcia_ide.c diff --git a/c/src/lib/libbsp/powerpc/gen5200/i2c/i2c.c b/c/src/lib/libbsp/powerpc/gen5200/i2c/i2c.c deleted file mode 100644 index 0b5adeb2a9..0000000000 --- a/c/src/lib/libbsp/powerpc/gen5200/i2c/i2c.c +++ /dev/null @@ -1,320 +0,0 @@ -/* I2C bus common (driver-independent) primitives implementation. - * - * Copyright (C) 2000 OKTET Ltd., St.-Petersburg, Russia - * Author: Victor V. Vengerov - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * - * http://www.rtems.org/license/LICENSE. - */ - -#include -#include -#include - -/* i2c_transfer_sema_done_func -- - * This function called from I2C driver layer to signal that I2C - * transfer is finished. This function resumes of task execution which - * has invoked blocking I2C primitive. - * - * PARAMETERS: - * arg - done function argument; it is RTEMS semaphore ID. - */ -static void -i2c_transfer_sema_done_func(void * arg) -{ - rtems_id sema = *(rtems_id *)arg; - rtems_semaphore_release(sema); -} - -/* i2c_transfer_poll_done_func -- - * This function called from I2C driver layer to signal that I2C - * transfer is finished. This function set the flag polled by waiting - * function. - * - * PARAMETERS: - * arg - done function argument; address of poll_done_flag - */ -static void -i2c_transfer_poll_done_func(void *arg) -{ - bool *poll_done_flag = (bool *)arg; - *poll_done_flag = true; -} - -/* i2c_transfer_wait_sema -- - * Initiate I2C bus transfer and block on temporary created semaphore - * until this transfer will be finished. - * - * PARAMETERS: - * bus - I2C bus number - * msg - pointer to transfer messages array - * nmsg - number of messages in transfer - * - * RETURNS: - * RTEMS_SUCCESSFUL, if tranfer finished successfully, - * or RTEMS status code if semaphore operations has failed. - */ -static i2c_message_status -i2c_transfer_wait_sema(i2c_bus_number bus, i2c_message *msg, int nmsg) -{ - rtems_status_code sc; - rtems_id sema; - sc = rtems_semaphore_create( - rtems_build_name('I', '2', 'C', 'S'), - 0, - RTEMS_COUNTING_SEMAPHORE | RTEMS_NO_INHERIT_PRIORITY | - RTEMS_NO_PRIORITY_CEILING | RTEMS_LOCAL, - 0, - &sema - ); - if (sc != RTEMS_SUCCESSFUL) - return I2C_RESOURCE_NOT_AVAILABLE; - sc = i2c_transfer(bus, nmsg, msg, - i2c_transfer_sema_done_func, &sema); - if (sc != RTEMS_SUCCESSFUL) - { - rtems_semaphore_delete(sema); - return sc; - } - rtems_semaphore_obtain(sema, RTEMS_WAIT, RTEMS_NO_TIMEOUT); - sc = rtems_semaphore_delete(sema); - return sc; -} - -/* i2c_transfer_wait_poll -- - * Initiate I2C bus transfer and wait by poll transaction done flag until - * this transfer will be finished. - * - * PARAMETERS: - * bus - I2C bus number - * msg - pointer to transfer messages array - * nmsg - number of messages in transfer - * - * RETURNS: - * RTEMS_SUCCESSFUL - */ -static rtems_status_code -i2c_transfer_wait_poll(i2c_bus_number bus, i2c_message *msg, int nmsg) -{ - /* - * this looks nasty, but is correct: - * we wait in this function, until the poll_done_flag is - * set deep inside the i2c_poll() function - */ - volatile bool poll_done_flag; - rtems_status_code sc; - poll_done_flag = false; - sc = i2c_transfer(bus, nmsg, msg, - i2c_transfer_poll_done_func,(void *)&poll_done_flag); - if (sc != RTEMS_SUCCESSFUL) - return sc; - while (poll_done_flag == false) - { - i2c_poll(bus); - } - return RTEMS_SUCCESSFUL; -} - -/* i2c_transfer_wait -- - * Initiate I2C bus transfer and block until this transfer will be - * finished. This function wait the semaphore if system in - * SYSTEM_STATE_UP state, or poll done flag in other states. - * - * PARAMETERS: - * bus - I2C bus number - * msg - pointer to transfer messages array - * nmsg - number of messages in transfer - * - * RETURNS: - * I2C_SUCCESSFUL, if tranfer finished successfully, - * I2C_RESOURCE_NOT_AVAILABLE, if semaphore operations has failed, - * value of status field of first error-finished message in transfer, - * if something wrong. - */ -i2c_message_status -i2c_transfer_wait(i2c_bus_number bus, i2c_message *msg, int nmsg) -{ - rtems_status_code sc; - int i; - if (_System_state_Is_up(_System_state_Get())) - { - sc = i2c_transfer_wait_sema(bus, msg, nmsg); - } - else - { - sc = i2c_transfer_wait_poll(bus, msg, nmsg); - } - - if (sc != RTEMS_SUCCESSFUL) - return I2C_RESOURCE_NOT_AVAILABLE; - - for (i = 0; i < nmsg; i++) - { - if (msg[i].status != I2C_SUCCESSFUL) - { - return msg[i].status; - } - } - return I2C_SUCCESSFUL; -} - -/* i2c_write -- - * Send single message over specified I2C bus to addressed device and - * wait while transfer is finished. - * - * PARAMETERS: - * bus - I2C bus number - * addr - address of I2C device - * buf - data to be sent to device - * size - data buffer size - * - * RETURNS: - * transfer status - */ -i2c_message_status -i2c_write(i2c_bus_number bus, i2c_address addr, void *buf, int size) -{ - i2c_message msg; - msg.addr = addr; - msg.flags = I2C_MSG_WR; - if (addr > 0xff) - msg.flags |= I2C_MSG_ADDR_10; - msg.status = 0; - msg.len = size; - msg.buf = buf; - return i2c_transfer_wait(bus, &msg, 1); -} - -/* i2c_wrbyte -- - * Send single one-byte long message over specified I2C bus to - * addressed device and wait while transfer is finished. - * - * PARAMETERS: - * bus - I2C bus number - * addr - address of I2C device - * cmd - byte message to be sent to device - * - * RETURNS: - * transfer status - */ -i2c_message_status -i2c_wrbyte(i2c_bus_number bus, i2c_address addr, uint8_t cmd) -{ - i2c_message msg; - uint8_t data = cmd; - msg.addr = addr; - msg.flags = I2C_MSG_WR; - if (addr > 0xff) - msg.flags |= I2C_MSG_ADDR_10; - msg.status = 0; - msg.len = sizeof(data); - msg.buf = &data; - return i2c_transfer_wait(bus, &msg, 1); -} - -/* i2c_read -- - * receive single message over specified I2C bus from addressed device. - * This call will wait while transfer is finished. - * - * PARAMETERS: - * bus - I2C bus number - * addr - address of I2C device - * buf - buffer for received message - * size - receive buffer size - * - * RETURNS: - * transfer status - */ -i2c_message_status -i2c_read(i2c_bus_number bus, i2c_address addr, void *buf, int size) -{ - i2c_message msg; - msg.addr = addr; - msg.flags = 0; - if (addr > 0xff) - msg.flags |= I2C_MSG_ADDR_10; - msg.status = 0; - msg.len = size; - msg.buf = buf; - return i2c_transfer_wait(bus, &msg, 1); -} - -/* i2c_wrrd -- - * Send message over I2C bus to specified device and receive message - * from the same device during single transfer. - * - * PARAMETERS: - * bus - I2C bus number - * addr - address of I2C device - * bufw - data to be sent to device - * sizew - send data buffer size - * bufr - buffer for received message - * sizer - receive buffer size - * - * RETURNS: - * transfer status - */ -i2c_message_status -i2c_wrrd(i2c_bus_number bus, i2c_address addr, void *bufw, int sizew, - void *bufr, int sizer) -{ - i2c_message msg[2]; - msg[0].addr = addr; - msg[0].flags = I2C_MSG_WR | I2C_MSG_ERRSKIP; - if (addr > 0xff) - msg[0].flags |= I2C_MSG_ADDR_10; - msg[0].status = 0; - msg[0].len = sizew; - msg[0].buf = bufw; - - msg[1].addr = addr; - msg[1].flags = 0; - if (addr > 0xff) - msg[1].flags |= I2C_MSG_ADDR_10; - msg[1].status = 0; - msg[1].len = sizer; - msg[1].buf = bufr; - - return i2c_transfer_wait(bus, msg, 2); -} - -/* i2c_wbrd -- - * Send one-byte message over I2C bus to specified device and receive - * message from the same device during single transfer. - * - * PARAMETERS: - * bus - I2C bus number - * addr - address of I2C device - * cmd - one-byte message to be sent over I2C bus - * bufr - buffer for received message - * sizer - receive buffer size - * - * RETURNS: - * transfer status - */ -i2c_message_status -i2c_wbrd(i2c_bus_number bus, i2c_address addr, uint8_t cmd, - void *bufr, int sizer) -{ - i2c_message msg[2]; - uint8_t bufw = cmd; - msg[0].addr = addr; - msg[0].flags = I2C_MSG_WR | I2C_MSG_ERRSKIP; - if (addr > 0xff) - msg[0].flags |= I2C_MSG_ADDR_10; - msg[0].status = 0; - msg[0].len = sizeof(bufw); - msg[0].buf = &bufw; - - msg[1].addr = addr; - msg[1].flags = I2C_MSG_ERRSKIP; - if (addr > 0xff) - msg[1].flags |= I2C_MSG_ADDR_10; - msg[1].status = 0; - msg[1].len = sizer; - msg[1].buf = bufr; - - return i2c_transfer_wait(bus, msg, 2); -} diff --git a/c/src/lib/libbsp/powerpc/gen5200/i2c/i2cdrv.c b/c/src/lib/libbsp/powerpc/gen5200/i2c/i2cdrv.c deleted file mode 100644 index 2c20b3dbdc..0000000000 --- a/c/src/lib/libbsp/powerpc/gen5200/i2c/i2cdrv.c +++ /dev/null @@ -1,287 +0,0 @@ -/*===============================================================*\ -| Project: RTEMS generic MPC5200 BSP | -+-----------------------------------------------------------------+ -| Copyright (c) 2005 | -| Embedded Brains GmbH | -| Obere Lagerstr. 30 | -| D-82178 Puchheim | -| Germany | -| rtems@embedded-brains.de | -+-----------------------------------------------------------------+ -| The license and distribution terms for this file may be | -| found in the file LICENSE in this distribution or at | -| | -| http://www.rtems.org/license/LICENSE. | -| | -+-----------------------------------------------------------------+ -| I2C driver for MPC5200 | -+-----------------------------------------------------------------+ -| This file has been adapted from an existing source code file, | -| see the original file header below for reference | -\*===============================================================*/ - -/* I2C driver for MCF5206eLITE board. I2C bus accessed through on-chip - * MCF5206e MBUS controller. - * - * The purpose of this module is to perform I2C driver initialization - * and serialize I2C transfers. - * - * Copyright (C) 2000 OKTET Ltd., St.-Petersburg, Russia - * Author: Victor V. Vengerov - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * - * http://www.rtems.org/license/LICENSE. - */ - -#include -#include -#include -#include -#include - -#include "mpc5200mbus.h" - -#ifndef I2C_NUMBER_OF_BUSES -#define I2C_NUMBER_OF_BUSES (2) -#endif - -#ifndef I2C_SELECT_BUS -#define I2C_SELECT_BUS(bus) -#endif - -/* - * Few I2C transfers may be posted simultaneously, but MBUS driver is able - * to process it one-by-one. To serialize transfers, function i2c_transfer - * put transfer information to the queue and initiate new transfers if MBUS - * driver is not busy. When driver is busy, next transfer is dequeued - * when current active transfer is finished. - */ - -/* - * i2c_qel - I2C transfers queue element; contain information about - * delayed transfer - */ -typedef struct i2c_qel { - i2c_bus_number bus; /* I2C bus number */ - i2c_message *msg; /* pointer to the transfer' messages array */ - int nmsg; /* number of messages in transfer */ - i2c_transfer_done done; /* transfer done callback function */ - void * done_arg_ptr; /* arbitrary arg pointer to done callback */ -} i2c_qel; - -/* Memory for I2C transfer queue. This queue represented like a ring buffer */ -static i2c_qel *tqueue; - -/* Maximum number of elements in transfer queue */ -static int tqueue_size; - -/* Position of next free element in a ring buffer */ -static volatile int tqueue_head; - -/* Position of the first element in transfer queue */ -static volatile int tqueue_tail; - -/* MBus I2C bus controller busy flag */ -static volatile bool mbus_busy; - -/* MBus I2C bus controller descriptor */ -static mpc5200mbus mbus[I2C_NUMBER_OF_BUSES]; - -/* Clock rate selected for each of bus */ -static int i2cdrv_bus_clock_div[I2C_NUMBER_OF_BUSES]; - -/* Currently selected I2C bus clock rate */ -static int i2cdrv_bus_clock_div_current; - -/* Forward function declaration */ -static void i2cdrv_unload(void); - -/* i2cdrv_done -- - * Callback function which is called from MBus low-level driver when - * transfer is finished. - */ -static void -i2cdrv_done(void * arg_ptr) -{ - rtems_interrupt_level level; - i2c_qel *qel = tqueue + tqueue_tail; - qel->done(qel->done_arg_ptr); - rtems_interrupt_disable(level); - tqueue_tail = (tqueue_tail + 1) % tqueue_size; - mbus_busy = false; - rtems_interrupt_enable(level); - i2cdrv_unload(); -} - -/* i2cdrv_unload -- - * If MBUS controller is not busy and transfer waiting in a queue, - * initiate processing of the next transfer in queue. - */ -static void -i2cdrv_unload(void) -{ - rtems_interrupt_level level; - i2c_qel *qel; - rtems_status_code sc; - rtems_interrupt_disable(level); - if (!mbus_busy && (tqueue_head != tqueue_tail)) - { - mbus_busy = true; - rtems_interrupt_enable(level); - qel = tqueue + tqueue_tail; - - I2C_SELECT_BUS(qel->bus); - if (i2cdrv_bus_clock_div[qel->bus] != i2cdrv_bus_clock_div_current) - { - i2cdrv_bus_clock_div_current = i2cdrv_bus_clock_div[qel->bus]; - mpc5200mbus_select_clock_divider(&mbus[qel->bus], i2cdrv_bus_clock_div_current); - } - sc = mpc5200mbus_i2c_transfer(&mbus[qel->bus], qel->nmsg, qel->msg, - i2cdrv_done,qel); - if (sc != RTEMS_SUCCESSFUL) - { - int i; - for (i = 0; i < qel->nmsg; i++) - { - qel->msg[i].status = I2C_RESOURCE_NOT_AVAILABLE; - } - i2cdrv_done(qel); - } - } - else - { - rtems_interrupt_enable(level); - } -} - -/* i2c_transfer -- - * Initiate multiple-messages transfer over specified I2C bus or - * put request into queue if bus or some other resource is busy. (This - * is non-blocking function). - * - * PARAMETERS: - * bus - I2C bus number - * nmsg - number of messages - * msg - pointer to messages array - * done - function which is called when transfer is finished - * done_arg_ptr - arbitrary argument pointer passed to done funciton - * - * RETURNS: - * RTEMS_SUCCESSFUL if transfer initiated successfully, or error - * code if something failed. - */ -rtems_status_code -i2c_transfer(i2c_bus_number bus, int nmsg, i2c_message *msg, - i2c_transfer_done done, void * done_arg_ptr) -{ - i2c_qel qel; - rtems_interrupt_level level; - - if (bus >= I2C_NUMBER_OF_BUSES) - { - return RTEMS_INVALID_NUMBER; - } - - if (msg == NULL) - { - return RTEMS_INVALID_ADDRESS; - } - - qel.bus = bus; - qel.msg = msg; - qel.nmsg = nmsg; - qel.done = done; - qel.done_arg_ptr = done_arg_ptr; - rtems_interrupt_disable(level); - if ((tqueue_head + 1) % tqueue_size == tqueue_tail) - { - rtems_interrupt_enable(level); - return RTEMS_TOO_MANY; - } - memcpy(tqueue + tqueue_head, &qel, sizeof(qel)); - tqueue_head = (tqueue_head + 1) % tqueue_size; - rtems_interrupt_enable(level); - i2cdrv_unload(); - return RTEMS_SUCCESSFUL; -} - -/* i2cdrv_initialize -- - * I2C driver initialization (rtems I/O driver primitive) - */ -rtems_device_driver -i2cdrv_initialize(rtems_device_major_number major, - rtems_device_minor_number minor, - void *arg) -{ - int i; - rtems_status_code sc; - mbus_busy = false; - tqueue_tail = tqueue_head = 0; - tqueue_size = 32; - tqueue = calloc(tqueue_size, sizeof(i2c_qel)); - - for (i = 0; i < I2C_NUMBER_OF_BUSES; i++) - { - mbus[i].bus_idx = i; - sc = mpc5200mbus_initialize(&mbus[i]); - if (sc != RTEMS_SUCCESSFUL) - return sc; - } - - for (i = 0; i < I2C_NUMBER_OF_BUSES; i++) - { - sc = i2c_select_clock_rate(i, 100000); - if (sc != RTEMS_SUCCESSFUL) - return sc; - } - i2cdrv_bus_clock_div_current = -1; - return RTEMS_SUCCESSFUL; -} - -/* i2c_select_clock_rate -- - * select I2C bus clock rate for specified bus. Some bus controller do not - * allow to select arbitrary clock rate; in this case nearest possible - * slower clock rate is selected. - * - * PARAMETERS: - * bus - I2C bus number - * bps - data transfer rate for this bytes in bits per second - * - * RETURNS: - * RTEMS_SUCCESSFUL, if operation performed successfully, - * RTEMS_INVALID_NUMBER, if wrong bus number is specified, - * RTEMS_UNSATISFIED, if bus do not support data transfer rate selection - * or specified data transfer rate could not be used. - */ -rtems_status_code -i2c_select_clock_rate(i2c_bus_number bus, int bps) -{ - int div; - if (bus >= I2C_NUMBER_OF_BUSES) - return RTEMS_INVALID_NUMBER; - - if (bps == 0) - return RTEMS_UNSATISFIED; - - div = IPB_CLOCK / bps; - i2cdrv_bus_clock_div[bus] = div; - return RTEMS_SUCCESSFUL; -} - -/* i2c_poll -- - * Poll I2C bus controller for events and hanle it. This function is - * used when I2C driver operates in poll-driven mode. - * - * PARAMETERS: - * bus - bus number to be polled - * - * RETURNS: - * none - */ -void -i2c_poll(i2c_bus_number bus) -{ - mpc5200mbus_poll(&mbus[bus]); -} diff --git a/c/src/lib/libbsp/powerpc/gen5200/i2c/mpc5200mbus.c b/c/src/lib/libbsp/powerpc/gen5200/i2c/mpc5200mbus.c deleted file mode 100644 index aa926bc8d9..0000000000 --- a/c/src/lib/libbsp/powerpc/gen5200/i2c/mpc5200mbus.c +++ /dev/null @@ -1,673 +0,0 @@ -/*===============================================================*\ -| Project: RTEMS generic MPC5200 BSP | -+-----------------------------------------------------------------+ -| Copyright (c) 2005 | -| Embedded Brains GmbH | -| Obere Lagerstr. 30 | -| D-82178 Puchheim | -| Germany | -| rtems@embedded-brains.de | -+-----------------------------------------------------------------+ -| The license and distribution terms for this file may be | -| found in the file LICENSE in this distribution or at | -| | -| http://www.rtems.org/license/LICENSE. | -| | -+-----------------------------------------------------------------+ -| MBUS module (I2C bus) driver | -+-----------------------------------------------------------------+ -| This file has been adapted from an existing source code file, | -| see the original file header below for reference | -\*===============================================================*/ - -/* MCF5206e MBUS module (I2C bus) driver - * - * Copyright (C) 2000 OKTET Ltd., St.-Petersburg, Russia - * Author: Victor V. Vengerov - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * - * http://www.rtems.org/license/LICENSE. - */ -#include "../i2c/mpc5200mbus.h" -#include -#include -#include - -/* Events of I2C machine */ -typedef enum i2c_event { - EVENT_NONE, /* Spurious event */ - EVENT_TRANSFER, /* Start new transfer */ - EVENT_NEXTMSG, /* Start processing of next message in transfer */ - EVENT_ACK, /* Sending finished with ACK */ - EVENT_NACK, /* Sending finished with NACK */ - EVENT_TIMEOUT, /* Timeout occured */ - EVENT_DATA_RECV, /* Data received */ - EVENT_ARB_LOST, /* Arbitration lost */ - EVENT_SLAVE /* Addressed as a slave */ -} i2c_event; - -/*** Auxillary primitives ***/ - -/* Change state of finite state machine */ -#define next_state(bus,new_state) \ - do { \ - (bus)->state = (new_state); \ - } while (0) - -/* Initiate start condition on the I2C bus */ -#define mpc5200mbus_start(bus) \ - do { \ - mpc5200.i2c_regs[bus->bus_idx].mcr |= MPC5200_I2C_MCR_MSTA; \ - } while (0) - -/* Initiate stop condition on the I2C bus */ -#define mpc5200mbus_stop(bus) \ - do { \ - mpc5200.i2c_regs[bus->bus_idx].mcr &= ~MPC5200_I2C_MCR_MSTA; \ - } while (0) - -/* Initiate repeat start condition on the I2C bus */ -#define mpc5200mbus_rstart(bus) \ - do { \ - mpc5200.i2c_regs[bus->bus_idx].mcr |= MPC5200_I2C_MCR_RSTA; \ - } while (0) - -/* Send byte to the bus */ -#define mpc5200mbus_send(bus,byte) \ - do { \ - mpc5200.i2c_regs[bus->bus_idx].mdr = (byte); \ - } while (0) - -/* Set transmit mode */ -#define mpc5200mbus_tx_mode(bus) \ - do { \ - mpc5200.i2c_regs[bus->bus_idx].mcr |= MPC5200_I2C_MCR_MTX; \ - } while (0) - -/* Set receive mode */ -#define mpc5200mbus_rx_mode(bus) \ - do { \ - mpc5200.i2c_regs[bus->bus_idx].mcr &= ~MPC5200_I2C_MCR_MTX; \ - (void)mpc5200.i2c_regs[bus->bus_idx].mdr; \ - } while (0) - - -/* Transmit acknowledge when byte received */ -#define mpc5200mbus_send_ack(bus) \ - do { \ - mpc5200.i2c_regs[bus->bus_idx].mcr &= ~MPC5200_I2C_MCR_TXAK; \ - } while (0) - -/* DO NOT transmit acknowledge when byte received */ -#define mpc5200mbus_send_nack(bus) \ - do { \ - mpc5200.i2c_regs[bus->bus_idx].mcr |= MPC5200_I2C_MCR_TXAK; \ - } while (0) - -#define mpc5200mbus_error(bus,err_status) \ - do { \ - do { \ - (bus)->cmsg->status = (err_status); \ - (bus)->cmsg++; \ - } while (((bus)->cmsg - (bus)->msg < (bus)->nmsg) && \ - ((bus)->cmsg->flags & I2C_MSG_ERRSKIP)); \ - bus->cmsg--; \ - } while (0) - -/* mpc5200mbus_get_event -- - * Read MBUS module status register, determine interrupt reason and - * return appropriate event. - * - * PARAMETERS: - * bus - pointer to MBUS module descriptor structure - * - * RETURNS: - * event code - */ -static i2c_event -mpc5200mbus_get_event(mpc5200mbus *bus) -{ - i2c_event event; - uint8_t status, control; - rtems_interrupt_level level; - rtems_interrupt_disable(level); - status = mpc5200.i2c_regs[bus->bus_idx].msr; - control = mpc5200.i2c_regs[bus->bus_idx].mcr; - if (status & MPC5200_I2C_MSR_MIF) /* Interrupt occured */ - { - if (status & MPC5200_I2C_MSR_MAAS) - { - event = EVENT_SLAVE; - mpc5200.i2c_regs[bus->bus_idx].mcr = control; /* To clear Addressed As Slave - condition */ - } - else if (status & MPC5200_I2C_MSR_MAL) /* Arbitration lost */ - { - mpc5200.i2c_regs[bus->bus_idx].msr = status & ~MPC5200_I2C_MSR_MAL; - event = EVENT_ARB_LOST; - } - else if (control & MPC5200_I2C_MCR_MTX) /* Trasmit mode */ - { - if (status & MPC5200_I2C_MSR_RXAK) - event = EVENT_NACK; - else - event = EVENT_ACK; - } - else /* Received */ - { - event = EVENT_DATA_RECV; - } - - /* Clear interrupt condition */ - mpc5200.i2c_regs[bus->bus_idx].msr &= ~MPC5200_I2C_MSR_MIF; - } - else - { - event = EVENT_NONE; - } - rtems_interrupt_enable(level); - return event; -} - -static void -mpc5200mbus_machine_error(mpc5200mbus *bus, i2c_event event) -{ - return; -} - -/* mpc5200mbus_machine -- - * finite state machine for I2C bus protocol - * - * PARAMETERS: - * bus - pointer to ColdFire MBUS descriptor structure - * event - I2C event - * - * RETURNS: - * none - */ -static void -mpc5200mbus_machine(mpc5200mbus *bus, i2c_event event) -{ - uint8_t b; - switch (bus->state) - { - - case STATE_UNINITIALIZED: - /* this should never happen. */ - mpc5200mbus_machine_error(bus, event); - break; - case STATE_IDLE: - switch (event) - { - case EVENT_NEXTMSG: /* Start new message processing */ - bus->cmsg++; - /* FALLTHRU */ - - case EVENT_TRANSFER: /* Initiate new transfer */ - if (bus->cmsg - bus->msg >= bus->nmsg) - { - mpc5200mbus_stop(bus); - next_state(bus, STATE_IDLE); - bus->msg = bus->cmsg = NULL; - bus->nmsg = bus->byte = 0; - bus->done(bus->done_arg_ptr); - break; - } - - /* Initiate START or REPEATED START condition on the bus */ - if (event == EVENT_TRANSFER) - { - mpc5200mbus_start(bus); - } - else /* (event == EVENT_NEXTMSG) */ - { - mpc5200mbus_rstart(bus); - } - - bus->byte = 0; - mpc5200mbus_tx_mode(bus); - - /* Initiate slave address sending */ - if (bus->cmsg->flags & I2C_MSG_ADDR_10) - { - i2c_address a = bus->cmsg->addr; - b = 0xf0 | (((a >> 8) & 0x03) << 1); - if (bus->cmsg->flags & I2C_MSG_WR) - { - mpc5200mbus_send(bus, b); - next_state(bus, STATE_ADDR_1_W); - } - else - { - mpc5200mbus_send(bus, b | 1); - next_state(bus, STATE_ADDR_1_R); - } - } - else - { - b = (bus->cmsg->addr & ~0x01); - - if (bus->cmsg->flags & I2C_MSG_WR) - { - next_state(bus, STATE_SENDING); - } - else - { - next_state(bus, STATE_ADDR_7); - b |= 1; - } - - mpc5200mbus_send(bus, b); - } - break; - - default: - mpc5200mbus_machine_error(bus, event); - break; - } - break; - - case STATE_ADDR_7: - switch (event) - { - case EVENT_ACK: - mpc5200mbus_rx_mode(bus); - if (bus->cmsg->len <= 1) - mpc5200mbus_send_nack(bus); - else - mpc5200mbus_send_ack(bus); - next_state(bus, STATE_RECEIVING); - break; - - case EVENT_NACK: - mpc5200mbus_error(bus, I2C_NO_DEVICE); - next_state(bus, STATE_IDLE); - mpc5200mbus_machine(bus, EVENT_NEXTMSG); - break; - - case EVENT_ARB_LOST: - mpc5200mbus_error(bus, I2C_ARBITRATION_LOST); - next_state(bus, STATE_IDLE); - mpc5200mbus_machine(bus, EVENT_NEXTMSG); - break; - - default: - mpc5200mbus_machine_error(bus, event); - break; - } - break; - - case STATE_ADDR_1_R: - case STATE_ADDR_1_W: - switch (event) - { - case EVENT_ACK: - { - uint8_t b = (bus->cmsg->addr & 0xff); - mpc5200mbus_send(bus, b); - if (bus->state == STATE_ADDR_1_W) - { - next_state(bus, STATE_SENDING); - } - else - { - i2c_address a; - mpc5200mbus_rstart(bus); - mpc5200mbus_tx_mode(bus); - a = bus->cmsg->addr; - b = 0xf0 | (((a >> 8) & 0x03) << 1) | 1; - mpc5200mbus_send(bus, b); - next_state(bus, STATE_ADDR_7); - } - break; - } - - case EVENT_NACK: - mpc5200mbus_error(bus, I2C_NO_DEVICE); - next_state(bus, STATE_IDLE); - mpc5200mbus_machine(bus, EVENT_NEXTMSG); - break; - - case EVENT_ARB_LOST: - mpc5200mbus_error(bus, I2C_ARBITRATION_LOST); - next_state(bus, STATE_IDLE); - mpc5200mbus_machine(bus, EVENT_NEXTMSG); - break; - - default: - mpc5200mbus_machine_error(bus, event); - break; - } - break; - - case STATE_SENDING: - switch (event) - { - case EVENT_ACK: - if (bus->byte == bus->cmsg->len) - { - next_state(bus, STATE_IDLE); - mpc5200mbus_machine(bus, EVENT_NEXTMSG); - } - else - { - mpc5200mbus_send(bus, bus->cmsg->buf[bus->byte++]); - next_state(bus, STATE_SENDING); - } - break; - - case EVENT_NACK: - if (bus->byte == 0) - { - mpc5200mbus_error(bus, I2C_NO_DEVICE); - } - else - { - mpc5200mbus_error(bus, I2C_NO_ACKNOWLEDGE); - } - next_state(bus, STATE_IDLE); - mpc5200mbus_machine(bus, EVENT_NEXTMSG); - break; - - case EVENT_ARB_LOST: - mpc5200mbus_error(bus, I2C_ARBITRATION_LOST); - next_state(bus, STATE_IDLE); - mpc5200mbus_machine(bus, EVENT_NEXTMSG); - break; - - default: - mpc5200mbus_machine_error(bus, event); - break; - - } - break; - - case STATE_RECEIVING: - switch (event) - { - case EVENT_DATA_RECV: - if (bus->cmsg->len - bus->byte <= 2) - { - mpc5200mbus_send_nack(bus); - if (bus->cmsg->len - bus->byte <= 1) - { - if (bus->cmsg - bus->msg + 1 == bus->nmsg) - mpc5200mbus_stop(bus); - else - mpc5200mbus_rstart(bus); - } - } - else - { - mpc5200mbus_send_ack(bus); - } - bus->cmsg->buf[bus->byte++] = mpc5200.i2c_regs[bus->bus_idx].mdr; - if (bus->cmsg->len == bus->byte) - { - next_state(bus,STATE_IDLE); - mpc5200mbus_machine(bus, EVENT_NEXTMSG); - } - else - { - next_state(bus,STATE_RECEIVING); - } - break; - - case EVENT_ARB_LOST: - mpc5200mbus_error(bus, I2C_ARBITRATION_LOST); - next_state(bus, STATE_IDLE); - mpc5200mbus_machine(bus, EVENT_NEXTMSG); - break; - - default: - mpc5200mbus_machine_error(bus, event); - break; - } - break; - } -} - -/* mpc5200mbus_interrupt_handler -- - * MBUS module interrupt handler routine - * - * PARAMETERS: - * handle: pointer to mbus structure - * - * RETURNS: - * none - */ -static void mpc5200mbus_interrupt_handler(rtems_irq_hdl_param handle) -{ - i2c_event event; - mpc5200mbus *bus = handle; - - event = mpc5200mbus_get_event(bus); - /* - * clear interrupt bit - */ - mpc5200.i2c_regs[bus->bus_idx].msr &= ~MPC5200_I2C_MSR_MIF; - - mpc5200mbus_machine(bus, event); -} - -/* - * mpc5200_mbus_irq_enable - * enable irq for mbus - */ -static void mpc5200mbus_irq_enable(const rtems_irq_connect_data* ptr) -{ - int minor = ((mpc5200mbus*)(ptr->handle))->bus_idx; - - mpc5200.i2c_regs[minor].mcr |= MPC5200_I2C_MCR_MIEN; -} - -/* - * mpc5200_mbus_irq_disable - * enable irq for mbus - */ -static void mpc5200mbus_irq_disable(const rtems_irq_connect_data* ptr) -{ - int minor = ((mpc5200mbus*)(ptr->handle))->bus_idx; - - mpc5200.i2c_regs[minor].mcr &= ~MPC5200_I2C_MCR_MIEN; -} - -/* - * mpc5200_mbus_isOn - * check, whether irq is enabled - */ -static int mpc5200mbus_irq_isOn(const rtems_irq_connect_data* ptr) -{ - int minor = ((mpc5200mbus*)(ptr->handle))->bus_idx; - - return (0 != (mpc5200.i2c_regs[minor].mcr & MPC5200_I2C_MCR_MIEN)); -} - -/* mpc5200mbus_poll -- - * MBUS module poll routine; used to poll events when I2C driver - * operates in poll-driven mode. - * - * PARAMETERS: - * none - * - * RETURNS: - * none - */ -void -mpc5200mbus_poll(mpc5200mbus *bus) -{ - i2c_event event; - event = mpc5200mbus_get_event(bus); - if (event != EVENT_NONE) - mpc5200mbus_machine(bus, event); -} - -/* mpc5200mbus_select_clock_divider -- - * Select divider for system clock which is used for I2C bus clock - * generation. Not each divider can be selected for I2C bus; this - * function select nearest larger or equal divider. - * - * PARAMETERS: - * i2c_bus - pointer to the bus descriptor structure - * divider - system frequency divider for I2C serial clock. - * RETURNS: - * RTEMS_SUCCESSFUL, if operation performed successfully, or - * RTEMS error code when failed. - */ -rtems_status_code -mpc5200mbus_select_clock_divider(mpc5200mbus *bus, int divider) -{ - int i; - int mbc; - struct { - int divider; - int mbc; - } dividers[] ={ - { 20, 0x20 }, { 22, 0x21 }, { 24, 0x22 }, { 26, 0x23 }, - { 28, 0x00 }, { 30, 0x01 }, { 32, 0x25 }, { 34, 0x02 }, - { 36, 0x26 }, { 40, 0x03 }, { 44, 0x04 }, { 48, 0x05 }, - { 56, 0x06 }, { 64, 0x2a }, { 68, 0x07 }, { 72, 0x2B }, - { 80, 0x08 }, { 88, 0x09 }, { 96, 0x2D }, { 104, 0x0A }, - { 112, 0x2E }, { 128, 0x0B }, { 144, 0x0C }, { 160, 0x0D }, - { 192, 0x0E }, { 224, 0x32 }, { 240, 0x0F }, { 256, 0x33 }, - { 288, 0x10 }, { 320, 0x11 }, { 384, 0x12 }, { 448, 0x36 }, - { 480, 0x13 }, { 512, 0x37 }, { 576, 0x14 }, { 640, 0x15 }, - { 768, 0x16 }, { 896, 0x3A }, { 960, 0x17 }, { 1024, 0x3B }, - { 1152, 0x18 }, { 1280, 0x19 }, { 1536, 0x1A }, { 1792, 0x3E }, - { 1920, 0x1B }, { 2048, 0x3F }, { 2304, 0x1C }, { 2560, 0x1D }, - { 3072, 0x1E }, { 3840, 0x1F } - }; - - if (bus == NULL) - return RTEMS_INVALID_ADDRESS; - - for (i = 0, mbc = -1; i < sizeof(dividers)/sizeof(dividers[0]); i++) - { - mbc = dividers[i].mbc; - if (dividers[i].divider >= divider) - { - break; - } - } - mpc5200.i2c_regs[bus->bus_idx].mfdr = mbc; - return RTEMS_SUCCESSFUL; -} - -/* mpc5200mbus_initialize -- - * Initialize MPC5200 MBUS I2C bus controller. - * - * PARAMETERS: - * i2c_bus - pointer to the bus descriptor structure - * - * RETURNS: - * RTEMS_SUCCESSFUL, or RTEMS error code when initialization failed. - */ -rtems_status_code -mpc5200mbus_initialize(mpc5200mbus *i2c_bus) -{ - rtems_interrupt_level level; - rtems_status_code sc; - rtems_irq_connect_data mbusIrqData; - - if (i2c_bus == NULL) - return RTEMS_INVALID_ADDRESS; - - if (i2c_bus->state != STATE_UNINITIALIZED) /* Check if already initialized */ - return RTEMS_RESOURCE_IN_USE; - - i2c_bus->state = STATE_IDLE; - i2c_bus->msg = NULL; - i2c_bus->cmsg = NULL; - i2c_bus->nmsg = 0; - i2c_bus->byte = 0; - - /* - * install interrupt handler - */ - mbusIrqData.on = mpc5200mbus_irq_enable; - mbusIrqData.off = mpc5200mbus_irq_disable; - mbusIrqData.isOn = mpc5200mbus_irq_isOn; - mbusIrqData.handle = (rtems_irq_hdl_param)i2c_bus; - mbusIrqData.hdl = mpc5200mbus_interrupt_handler; - switch(i2c_bus->bus_idx) { - case 0: - mbusIrqData.name = BSP_SIU_IRQ_I2C1; - break; - case 1: - mbusIrqData.name = BSP_SIU_IRQ_I2C2; - break; - } - if (!BSP_install_rtems_irq_handler (&mbusIrqData)) { - sc = RTEMS_UNSATISFIED; - return sc; - } - - rtems_interrupt_disable(level); - - mpc5200.i2c_regs[i2c_bus->bus_idx].mcr &= ~MPC5200_I2C_MCR_MEN; - mpc5200.i2c_regs[i2c_bus->bus_idx].msr = 0; - mpc5200.i2c_regs[i2c_bus->bus_idx].mdr = 0x1F; /* Maximum possible divider is 3840 */ - mpc5200.i2c_regs[i2c_bus->bus_idx].mcr |= MPC5200_I2C_MCR_MEN; - - rtems_interrupt_enable(level); - - return RTEMS_SUCCESSFUL; -} - -/* mpc5200mbus_i2c_transfer -- - * Initiate multiple-messages transfer over I2C bus via ColdFire MBUS - * controller. - * - * PARAMETERS: - * bus - pointer to MBUS controller descriptor - * nmsg - number of messages - * msg - pointer to messages array - * done - function which is called when transfer is finished - * done_arg_ptr - arbitrary argument pointer passed to done funciton - * - * RETURNS: - * RTEMS_SUCCESSFUL if transfer initiated successfully, or error - * code when failed. - */ -rtems_status_code -mpc5200mbus_i2c_transfer(mpc5200mbus *bus, int nmsg, i2c_message *msg, - i2c_transfer_done done, void *done_arg_ptr) -{ - if (bus->state == STATE_UNINITIALIZED) - return RTEMS_NOT_CONFIGURED; - - bus->done = done; - bus->done_arg_ptr = done_arg_ptr; - bus->cmsg = bus->msg = msg; - bus->nmsg = nmsg; - bus->byte = 0; - bus->state = STATE_IDLE; - mpc5200mbus_machine(bus, EVENT_TRANSFER); - return RTEMS_SUCCESSFUL; -} - - -/* mpc5200mbus_i2c_done -- - * Close ColdFire MBUS I2C bus controller and release all resources. - * - * PARAMETERS: - * bus - pointer to MBUS controller descriptor - * - * RETURNS: - * RTEMS_SUCCESSFUL, if transfer initiated successfully, or error - * code when failed. - */ -rtems_status_code -mpc5200mbus_i2c_done(mpc5200mbus *i2c_bus) -{ - rtems_status_code sc = RTEMS_SUCCESSFUL; - - if (i2c_bus->state == STATE_UNINITIALIZED) - return RTEMS_NOT_CONFIGURED; - - mpc5200.i2c_regs[i2c_bus->bus_idx].mcr = 0; - - return sc; -} diff --git a/c/src/lib/libbsp/powerpc/gen5200/i2c/mpc5200mbus.h b/c/src/lib/libbsp/powerpc/gen5200/i2c/mpc5200mbus.h deleted file mode 100644 index e68b564e2f..0000000000 --- a/c/src/lib/libbsp/powerpc/gen5200/i2c/mpc5200mbus.h +++ /dev/null @@ -1,150 +0,0 @@ -/*===============================================================*\ -| Project: RTEMS generic MPC5200 BSP | -+-----------------------------------------------------------------+ -| Copyright (c) 2005 | -| Embedded Brains GmbH | -| Obere Lagerstr. 30 | -| D-82178 Puchheim | -| Germany | -| rtems@embedded-brains.de | -+-----------------------------------------------------------------+ -| The license and distribution terms for this file may be | -| found in the file LICENSE in this distribution or at | -| | -| http://www.rtems.org/license/LICENSE. | -| | -+-----------------------------------------------------------------+ -| MBUS module (I2C bus) definitions | -+-----------------------------------------------------------------+ -| This file has been adapted from an existing source code file, | -| see the original file header below for reference | -\*===============================================================*/ -/* - * MCF5206e MBUS module (I2C bus) driver header file - * - * Copyright (C) 2000 OKTET Ltd., St.-Petersburg, Russia - * Author: Victor V. Vengerov - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * - * http://www.rtems.org/license/LICENSE. - */ - -#ifndef __MPC5200BSP_MPC5200MBUS_H__ -#define __MPC5200BSP_MPC5200MBUS_H__ - -#include -#include - - -/* States of I2C machine */ -typedef enum mpc5200mbus_i2c_state { - STATE_UNINITIALIZED, - STATE_IDLE, - STATE_ADDR_7, - STATE_ADDR_1_W, - STATE_ADDR_1_R, - STATE_SENDING, - STATE_RECEIVING -} mpc5200mbus_i2c_state; - -typedef struct mpc5200_mbus { - enum mpc5200mbus_i2c_state state;/* State of I2C machine */ - i2c_message *msg; /* Pointer to the first message in transfer */ - int nmsg; /* Number of messages in transfer */ - i2c_message *cmsg; /* Current message */ - int byte; /* Byte number in current message */ - rtems_id sema; /* MBUS semaphore */ - i2c_transfer_done done; /* Transfer done function */ - void * done_arg_ptr; /* Done function argument pointer */ - int bus_idx; /* bus index: 0 or 1 */ -} mpc5200mbus; - -/* mpc5200mbus_initialize -- - * Initialize ColdFire MBUS I2C bus controller. - * - * PARAMETERS: - * i2c_bus - pointer to the bus descriptor structure - * - * RETURNS: - * RTEMS_SUCCESSFUL, or RTEMS error code when initialization failed. - */ -rtems_status_code -mpc5200mbus_initialize(mpc5200mbus *i2c_bus); - -/* mpc5200mbus_select_clock_divider -- - * Select divider for system clock which is used for I2C bus clock - * generation. Not each divider can be selected for I2C bus; this - * function select nearest larger or equal divider, or maximum - * possible divider, if passed value greater. - * - * PARAMETERS: - * i2c_bus - pointer to the bus descriptor structure - * divider - system frequency divider for I2C serial clock. - * - * RETURNS: - * RTEMS_SUCCESSFUL, if operation performed successfully, or - * RTEMS error code when failed. - */ -rtems_status_code -mpc5200mbus_select_clock_divider(mpc5200mbus *i2c_bus, int divider); - -/* mpc5200mbus_i2c_transfer -- - * Initiate multiple-messages transfer over I2C bus via ColdFire MBUS - * controller. - * - * PARAMETERS: - * bus - pointer to MBUS controller descriptor - * nmsg - number of messages - * msg - pointer to messages array - * done - function which is called when transfer is finished - * done_arg_ptr - arbitrary argument ptr passed to done funciton - * - * RETURNS: - * RTEMS_SUCCESSFUL if transfer initiated successfully, or error - * code when failed. - */ -rtems_status_code -mpc5200mbus_i2c_transfer(mpc5200mbus *bus, int nmsg, i2c_message *msg, - i2c_transfer_done done, void * done_arg_ptr); - -/* mpc5200mbus_i2c_done -- - * Close ColdFire MBUS I2C bus controller and release all resources. - * - * PARAMETERS: - * bus - pointer to MBUS controller descriptor - * - * RETURNS: - * RTEMS_SUCCESSFUL, if transfer initiated successfully, or error - * code when failed. - */ -rtems_status_code -mpc5200mbus_i2c_done(mpc5200mbus *i2c_bus); - -/* mpc5200mbus_i2c_interrupt_handler -- - * ColdFire MBUS I2C bus controller interrupt handler. This function - * called from real interrupt handler, and pointer to MBUS descriptor - * structure passed to this function. - * - * PARAMETERS: - * bus - pointert to the bus descriptor structure - * - * RETURNS: - * none - */ -void mpc5200mbus_i2c_interrupt_handler(mpc5200mbus *bus); - -/* mpc5200mbus_poll -- - * MBUS module poll routine; used to poll events when I2C driver - * operates in poll-driven mode. - * - * PARAMETERS: - * none - * - * RETURNS: - * none - */ -void mpc5200mbus_poll(mpc5200mbus *bus); - -#endif /* __MPC5200BSP_MPC5200MBUS_H__ */ -- cgit v1.2.3