diff options
Diffstat (limited to 'bsps/shared/grlib/uart/apbuart_cons.c')
-rw-r--r-- | bsps/shared/grlib/uart/apbuart_cons.c | 164 |
1 files changed, 103 insertions, 61 deletions
diff --git a/bsps/shared/grlib/uart/apbuart_cons.c b/bsps/shared/grlib/uart/apbuart_cons.c index c35020e53f..a8b4eaaf88 100644 --- a/bsps/shared/grlib/uart/apbuart_cons.c +++ b/bsps/shared/grlib/uart/apbuart_cons.c @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ + /* This file contains the driver for the GRLIB APBUART serial port. The driver * is implemented by using the cons.c console layer. Interrupt/Polling/Task * driven mode can be configured using driver resources: @@ -11,9 +13,26 @@ * COPYRIGHT (c) 2010. * Cobham Gaisler AB. * - * 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. + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. */ /******************* Driver manager interface ***********************/ @@ -28,11 +47,15 @@ #include <grlib/ambapp_bus.h> #include <grlib/apbuart.h> #include <grlib/ambapp.h> -#include <grlib/grlib.h> +#include <grlib/io.h> #include <grlib/cons.h> #include <rtems/termiostypes.h> #include <grlib/apbuart_cons.h> +#ifdef LEON3 +#include <bsp/leon3.h> +#endif + /*#define DEBUG 1 */ #ifdef DEBUG @@ -41,12 +64,6 @@ #define DBG(x...) #endif -/* LEON3 Low level transmit/receive functions provided by debug-uart code */ -#ifdef LEON3 -#include <leon.h> -extern struct apbuart_regs *leon3_debug_uart; /* The debug UART */ -#endif - /* Probed hardware capabilities */ enum { CAP_FIFO = 0x01, /* FIFO available */ @@ -55,9 +72,9 @@ enum { struct apbuart_priv { struct console_dev condev; struct drvmgr_dev *dev; - struct apbuart_regs *regs; + apbuart *regs; struct rtems_termios_tty *tty; - char devName[32]; + char devName[52]; volatile int sending; int mode; int cap; @@ -194,18 +211,23 @@ static const rtems_termios_device_handler handler_polled = { * can select appropriate routines for the hardware. probecap() return value * is a CAP_ bitmask. */ -static int probecap(struct apbuart_regs *regs) +static int probecap(apbuart *regs) { int cap = 0; + uint32_t ctrl; /* Probe FIFO */ - if (regs->ctrl & APBUART_CTRL_FA) { + ctrl = grlib_load_32(®s->ctrl); + if (ctrl & APBUART_CTRL_FA) { cap |= CAP_FIFO; /* Probe RX delayed interrupt */ - regs->ctrl |= APBUART_CTRL_DI; - if (regs->ctrl & APBUART_CTRL_DI) { - regs->ctrl &= ~APBUART_CTRL_DI; + ctrl |= APBUART_CTRL_DI; + grlib_store_32(®s->ctrl, ctrl); + ctrl = grlib_load_32(®s->ctrl); + if (ctrl & APBUART_CTRL_DI) { + ctrl &= ~APBUART_CTRL_DI; + grlib_store_32(®s->ctrl, ctrl); cap |= CAP_DI; } } @@ -222,6 +244,7 @@ int apbuart_init1(struct drvmgr_dev *dev) char prefix[32]; unsigned int db; static int first_uart = 1; + uint32_t ctrl; /* The default operation in AMP is to use APBUART[0] for CPU[0], * APBUART[1] for CPU[1] and so on. The remaining UARTs is not used @@ -250,10 +273,12 @@ int apbuart_init1(struct drvmgr_dev *dev) if (ambadev == NULL) return -1; pnpinfo = &ambadev->info; - priv->regs = (struct apbuart_regs *)pnpinfo->apb_slv->start; + priv->regs = (apbuart *)pnpinfo->apb_slv->start; /* Clear HW regs, leave baudrate register as it is */ - priv->regs->status = 0; + grlib_store_32(&priv->regs->status, 0); + + ctrl = grlib_load_32(&priv->regs->ctrl); /* leave Transmitter/receiver if this is the RTEMS debug UART (assume * it has been setup by boot loader). @@ -261,10 +286,10 @@ int apbuart_init1(struct drvmgr_dev *dev) db = 0; #ifdef LEON3 if (priv->regs == leon3_debug_uart) { - db = priv->regs->ctrl & (APBUART_CTRL_RE | - APBUART_CTRL_TE | - APBUART_CTRL_PE | - APBUART_CTRL_PS); + db = ctrl & (APBUART_CTRL_RE | + APBUART_CTRL_TE | + APBUART_CTRL_PE | + APBUART_CTRL_PS); } #endif /* Let UART debug tunnelling be untouched if Flow-control is set. @@ -274,12 +299,12 @@ int apbuart_init1(struct drvmgr_dev *dev) * guess that we are debugging if FL is already set, the debugger set * either LB or DB depending on UART capabilities. */ - if (priv->regs->ctrl & APBUART_CTRL_FL) { - db |= priv->regs->ctrl & (APBUART_CTRL_DB | + if (ctrl & APBUART_CTRL_FL) { + db |= ctrl & (APBUART_CTRL_DB | APBUART_CTRL_LB | APBUART_CTRL_FL); } - priv->regs->ctrl = db; + grlib_store_32(&priv->regs->ctrl, db); priv->cap = probecap(priv->regs); @@ -368,12 +393,13 @@ static int apbuart_info( sprintf(buf, "FS Name: %s", priv->condev.fsname); print_line(p, buf); } - sprintf(buf, "STATUS REG: 0x%x", priv->regs->status); + sprintf(buf, "STATUS REG: 0x%x", grlib_load_32(&priv->regs->status)); print_line(p, buf); - sprintf(buf, "CTRL REG: 0x%x", priv->regs->ctrl); + sprintf(buf, "CTRL REG: 0x%x", grlib_load_32(&priv->regs->ctrl)); print_line(p, buf); sprintf(buf, "SCALER REG: 0x%x baud rate %d", - priv->regs->scaler, apbuart_get_baud(priv)); + grlib_load_32(&priv->regs->scaler), + apbuart_get_baud(priv)); print_line(p, buf); return DRVMGR_OK; @@ -388,6 +414,8 @@ static bool first_open( ) { struct apbuart_priv *uart = base_get_priv(base); + apbuart *regs = uart->regs; + uint32_t ctrl; uart->tty = tty; @@ -399,11 +427,11 @@ static bool first_open( } /* Enable TX/RX */ - uart->regs->ctrl |= APBUART_CTRL_RE | APBUART_CTRL_TE; + ctrl = grlib_load_32(®s->ctrl); + ctrl |= APBUART_CTRL_RE | APBUART_CTRL_TE; if (uart->mode != TERMIOS_POLLED) { int ret; - uint32_t ctrl; /* Register interrupt and enable it */ ret = drvmgr_interrupt_register( @@ -416,15 +444,15 @@ static bool first_open( uart->sending = 0; /* Turn on RX interrupts */ - ctrl = uart->regs->ctrl; ctrl |= APBUART_CTRL_RI; if (uart->cap & CAP_DI) { /* Use RX FIFO interrupt only if delayed interrupt available. */ ctrl |= (APBUART_CTRL_DI | APBUART_CTRL_RF); } - uart->regs->ctrl = ctrl; } + grlib_store_32(®s->ctrl, ctrl); + return true; } @@ -435,13 +463,16 @@ static void last_close( ) { struct apbuart_priv *uart = base_get_priv(base); + apbuart *regs = uart->regs; rtems_interrupt_lock_context lock_context; + uint32_t ctrl; if (uart->mode != TERMIOS_POLLED) { /* Turn off RX interrupts */ rtems_termios_device_lock_acquire(base, &lock_context); - uart->regs->ctrl &= - ~(APBUART_CTRL_DI | APBUART_CTRL_RI | APBUART_CTRL_RF); + ctrl = grlib_load_32(®s->ctrl); + ctrl &= ~(APBUART_CTRL_DI | APBUART_CTRL_RI | APBUART_CTRL_RF); + grlib_store_32(®s->ctrl, ctrl); rtems_termios_device_lock_release(base, &lock_context); /**** Flush device ****/ @@ -449,8 +480,8 @@ static void last_close( /* Wait until all data has been sent */ } while ( - (uart->regs->ctrl & APBUART_CTRL_TE) && - !(uart->regs->status & APBUART_STATUS_TS) + (grlib_load_32(®s->ctrl) & APBUART_CTRL_TE) && + !(grlib_load_32(®s->status) & APBUART_STATUS_TS) ) { /* Wait until all data has left shift register */ } @@ -461,8 +492,11 @@ static void last_close( #ifdef LEON3 /* Disable TX/RX if not used for DEBUG */ - if (uart->regs != leon3_debug_uart) - uart->regs->ctrl &= ~(APBUART_CTRL_RE | APBUART_CTRL_TE); + if (regs != leon3_debug_uart) { + ctrl = grlib_load_32(®s->ctrl); + ctrl &= ~(APBUART_CTRL_RE | APBUART_CTRL_TE); + grlib_store_32(®s->ctrl, ctrl); + } #endif } @@ -478,10 +512,11 @@ static int read_task(rtems_termios_device_context *base) { rtems_interrupt_lock_context lock_context; struct apbuart_priv *uart = base_get_priv(base); - struct apbuart_regs *regs = uart->regs; + apbuart *regs = uart->regs; int cnt; char buf[33]; struct rtems_termios_tty *tty; + uint32_t ctrl; uint32_t ctrl_add; ctrl_add = APBUART_CTRL_RI; @@ -492,10 +527,10 @@ static int read_task(rtems_termios_device_context *base) do { cnt = 0; while ( - (regs->status & APBUART_STATUS_DR) && + (grlib_load_32(®s->status) & APBUART_STATUS_DR) && (cnt < sizeof(buf)) ) { - buf[cnt] = regs->data; + buf[cnt] = grlib_load_32(®s->data); cnt++; } if (0 < cnt) { @@ -509,9 +544,11 @@ static int read_task(rtems_termios_device_context *base) * afterwards. */ rtems_termios_device_lock_acquire(base, &lock_context); - regs->ctrl |= ctrl_add; + ctrl = grlib_load_32(®s->ctrl); + ctrl |= ctrl_add; + grlib_store_32(®s->ctrl, ctrl); rtems_termios_device_lock_release(base, &lock_context); - } while (regs->status & APBUART_STATUS_DR); + } while (grlib_load_32(®s->status) & APBUART_STATUS_DR); return EOF; } @@ -522,7 +559,7 @@ int apbuart_get_baud(struct apbuart_priv *uart) unsigned int scaler; /* Get current scaler setting */ - scaler = uart->regs->scaler; + scaler = grlib_load_32(&uart->regs->scaler); /* Get APBUART core frequency */ drvmgr_freq_get(uart->dev, DEV_APB_SLV, &core_clk_hz); @@ -557,7 +594,7 @@ static bool set_attributes( rtems_termios_device_lock_acquire(base, &lock_context); /* Read out current value */ - ctrl = uart->regs->ctrl; + ctrl = grlib_load_32(&uart->regs->ctrl); switch(t->c_cflag & (PARENB|PARODD)){ case (PARENB|PARODD): @@ -584,7 +621,7 @@ static bool set_attributes( ctrl &= ~APBUART_CTRL_FL; /* Update new settings */ - uart->regs->ctrl = ctrl; + grlib_store_32(&uart->regs->ctrl, ctrl); rtems_termios_device_lock_release(base, &lock_context); @@ -598,7 +635,7 @@ static bool set_attributes( scaler = (((core_clk_hz*10)/(baud*8))-5)/10; /* Set new baud rate by setting scaler */ - uart->regs->scaler = scaler; + grlib_store_32(&uart->regs->scaler, scaler); } return true; @@ -618,7 +655,7 @@ static void get_attributes( t->c_cflag |= CS8; /* Read out current parity */ - ctrl = uart->regs->ctrl; + ctrl = grlib_load_32(&uart->regs->ctrl); if (ctrl & APBUART_CTRL_PE) { if (ctrl & APBUART_CTRL_PS) t->c_cflag |= PARENB|PARODD; /* Odd parity */ @@ -654,11 +691,11 @@ static void write_interrupt( ) { struct apbuart_priv *uart = base_get_priv(base); - struct apbuart_regs *regs = uart->regs; + apbuart *regs = uart->regs; int sending; unsigned int ctrl; - ctrl = regs->ctrl; + ctrl = grlib_load_32(®s->ctrl); if (len > 0) { /* @@ -666,28 +703,30 @@ static void write_interrupt( * we can tell termios later. */ /* Enable TX interrupt (interrupt is edge-triggered) */ - regs->ctrl = ctrl | APBUART_CTRL_TI; + ctrl |= APBUART_CTRL_TI; + grlib_store_32(®s->ctrl, ctrl); if (ctrl & APBUART_CTRL_FA) { /* APBUART with FIFO.. Fill as many as FIFO allows */ sending = 0; while ( - ((regs->status & APBUART_STATUS_TF) == 0) && + ((grlib_load_32(®s->status) & APBUART_STATUS_TF) == 0) && (sending < len) ) { - regs->data = *buf; + grlib_store_32(®s->data, *buf); buf++; sending++; } } else { /* start UART TX, this will result in an interrupt when done */ - regs->data = *buf; + grlib_store_32(®s->data, *buf); sending = 1; } } else { /* No more to send, disable TX interrupts */ - regs->ctrl = ctrl & ~APBUART_CTRL_TI; + ctrl &= ~APBUART_CTRL_TI; + grlib_store_32(®s->ctrl, ctrl); /* Tell close that we sent everything */ sending = 0; @@ -703,21 +742,24 @@ static void apbuart_cons_isr(void *arg) rtems_termios_device_context *base; struct console_dev *condev = rtems_termios_get_device_context(tty); struct apbuart_priv *uart = condev_get_priv(condev); - struct apbuart_regs *regs = uart->regs; + apbuart *regs = uart->regs; unsigned int status; char buf[33]; int cnt; if (uart->mode == TERMIOS_TASK_DRIVEN) { - if ((status = regs->status) & APBUART_STATUS_DR) { + if ((status = grlib_load_32(®s->status)) & APBUART_STATUS_DR) { rtems_interrupt_lock_context lock_context; + uint32_t ctrl; /* Turn off RX interrupts */ base = rtems_termios_get_device_context(tty); rtems_termios_device_lock_acquire(base, &lock_context); - regs->ctrl &= + ctrl = grlib_load_32(®s->ctrl); + ctrl &= ~(APBUART_CTRL_DI | APBUART_CTRL_RI | APBUART_CTRL_RF); + grlib_store_32(®s->ctrl, ctrl); rtems_termios_device_lock_release(base, &lock_context); /* Activate termios RX daemon task */ rtems_termios_rxirq_occured(tty); @@ -730,10 +772,10 @@ static void apbuart_cons_isr(void *arg) */ cnt = 0; while ( - ((status=regs->status) & APBUART_STATUS_DR) && + ((status=grlib_load_32(®s->status)) & APBUART_STATUS_DR) && (cnt < sizeof(buf)) ) { - buf[cnt] = regs->data; + buf[cnt] = grlib_load_32(®s->data); cnt++; } if (0 < cnt) { |