bsps: Move zynq-uart to bsps/shared

This moves the zynq-uart driver from bsps/arm/shared to bsps/shared to
accomodate use by AArch64 BSPs.

2 files changed, 0 insertions, 361 deletions

diff --git a/bsps/arm/shared/serial/zynq-uart-polled.c b/bsps/arm/shared/serial/zynq-uart-polled.c
deleted file mode 100644
index e6f478ee07..0000000000
--- a/bsps/arm/shared/serial/zynq-uart-polled.c
+++ /dev/null
@@ -1,184 +0,0 @@
-/*
- * SPDX-License-Identifier: BSD-2-Clause
- *
- * Copyright (C) 2013, 2017 embedded brains GmbH
- *
- * 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.
- */
-
-#include <bsp/zynq-uart.h>
-#include <bsp/zynq-uart-regs.h>
-
-#include <bspopts.h>
-
-/*
- * Make weak and let the user override.
- */
-uint32_t zynq_uart_input_clock(void) __attribute__ ((weak));
-
-uint32_t zynq_uart_input_clock(void)
-{
-  return ZYNQ_CLOCK_UART;
-}
-
-static int zynq_cal_baud_rate(uint32_t  baudrate,
-                              uint32_t* brgr,
-                              uint32_t* bauddiv,
-                              uint32_t  modereg)
-{
-  uint32_t brgr_value;    /* Calculated value for baud rate generator */
-  uint32_t calcbaudrate;  /* Calculated baud rate */
-  uint32_t bauderror;     /* Diff between calculated and requested baud rate */
-  uint32_t best_error = 0xFFFFFFFF;
-  uint32_t percenterror;
-  uint32_t bdiv;
-  uint32_t inputclk = zynq_uart_input_clock();
-
-  /*
-   * Make sure the baud rate is not impossilby large.
-   * Fastest possible baud rate is Input Clock / 2.
-   */
-  if ((baudrate * 2) > inputclk) {
-    return -1;
-  }
-  /*
-   * Check whether the input clock is divided by 8
-   */
-  if(modereg & ZYNQ_UART_MODE_CLKS) {
-    inputclk = inputclk / 8;
-  }
-
-  /*
-   * Determine the Baud divider. It can be 4to 254.
-   * Loop through all possible combinations
-   */
-  for (bdiv = 4; bdiv < 255; bdiv++) {
-
-    /*
-     * Calculate the value for BRGR register
-     */
-    brgr_value = inputclk / (baudrate * (bdiv + 1));
-
-    /*
-     * Calculate the baud rate from the BRGR value
-     */
-    calcbaudrate = inputclk/ (brgr_value * (bdiv + 1));
-
-    /*
-     * Avoid unsigned integer underflow
-     */
-    if (baudrate > calcbaudrate) {
-      bauderror = baudrate - calcbaudrate;
-    }
-    else {
-      bauderror = calcbaudrate - baudrate;
-    }
-
-    /*
-     * Find the calculated baud rate closest to requested baud rate.
-     */
-    if (best_error > bauderror) {
-      *brgr = brgr_value;
-      *bauddiv = bdiv;
-      best_error = bauderror;
-    }
-  }
-
-  /*
-   * Make sure the best error is not too large.
-   */
-  percenterror = (best_error * 100) / baudrate;
-#define XUARTPS_MAX_BAUD_ERROR_RATE		 3	/* max % error allowed */
-  if (XUARTPS_MAX_BAUD_ERROR_RATE < percenterror) {
-    return -1;
-  }
-
-  return 0;
-}
-
-void zynq_uart_initialize(rtems_termios_device_context *base)
-{
-  zynq_uart_context *ctx = (zynq_uart_context *) base;
-  volatile zynq_uart *regs = ctx->regs;
-  uint32_t brgr = 0x3e;
-  uint32_t bauddiv = 0x6;
-
-  zynq_uart_reset_tx_flush(ctx);
-
-  zynq_cal_baud_rate(ZYNQ_UART_DEFAULT_BAUD, &brgr, &bauddiv, regs->mode);
-
-  regs->control &= ~(ZYNQ_UART_CONTROL_RXEN | ZYNQ_UART_CONTROL_TXEN);
-  regs->control = ZYNQ_UART_CONTROL_RXDIS
-    | ZYNQ_UART_CONTROL_TXDIS
-    | ZYNQ_UART_CONTROL_RXRES
-    | ZYNQ_UART_CONTROL_TXRES;
-  regs->mode = ZYNQ_UART_MODE_CHMODE(ZYNQ_UART_MODE_CHMODE_NORMAL)
-    | ZYNQ_UART_MODE_PAR(ZYNQ_UART_MODE_PAR_NONE)
-    | ZYNQ_UART_MODE_CHRL(ZYNQ_UART_MODE_CHRL_8);
-  regs->baud_rate_gen = ZYNQ_UART_BAUD_RATE_GEN_CD(brgr);
-  regs->baud_rate_div = ZYNQ_UART_BAUD_RATE_DIV_BDIV(bauddiv);
-  regs->rx_fifo_trg_lvl = ZYNQ_UART_RX_FIFO_TRG_LVL_RTRIG(0);
-  regs->rx_timeout = ZYNQ_UART_RX_TIMEOUT_RTO(0);
-  regs->control = ZYNQ_UART_CONTROL_RXEN
-    | ZYNQ_UART_CONTROL_TXEN
-    | ZYNQ_UART_CONTROL_RSTTO;
-}
-
-int zynq_uart_read_polled(rtems_termios_device_context *base)
-{
-  zynq_uart_context *ctx = (zynq_uart_context *) base;
-  volatile zynq_uart *regs = ctx->regs;
-
-  if ((regs->channel_sts & ZYNQ_UART_CHANNEL_STS_REMPTY) != 0) {
-    return -1;
-  } else {
-    return ZYNQ_UART_TX_RX_FIFO_FIFO_GET(regs->tx_rx_fifo);
-  }
-}
-
-void zynq_uart_write_polled(
-  rtems_termios_device_context *base,
-  char c
-)
-{
-  zynq_uart_context *ctx = (zynq_uart_context *) base;
-  volatile zynq_uart *regs = ctx->regs;
-
-  while ((regs->channel_sts & ZYNQ_UART_CHANNEL_STS_TFUL) != 0) {
-    /* Wait */
-  }
-
-  regs->tx_rx_fifo = ZYNQ_UART_TX_RX_FIFO_FIFO(c);
-}
-
-void zynq_uart_reset_tx_flush(zynq_uart_context *ctx)
-{
-  volatile zynq_uart *regs = ctx->regs;
-  int                 c = 4;
-
-  while (c-- > 0)
-    zynq_uart_write_polled(&ctx->base, '\r');
-
-  while ((regs->channel_sts & ZYNQ_UART_CHANNEL_STS_TEMPTY) == 0) {
-    /* Wait */
-  }
-}
diff --git a/bsps/arm/shared/serial/zynq-uart.c b/bsps/arm/shared/serial/zynq-uart.c
deleted file mode 100644
index fc670441b8..0000000000
--- a/bsps/arm/shared/serial/zynq-uart.c
+++ /dev/null
@@ -1,177 +0,0 @@
-/*
- * SPDX-License-Identifier: BSD-2-Clause
- *
- * Copyright (C) 2013, 2017 embedded brains GmbH
- *
- * 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.
- */
-
-#include <bsp/zynq-uart.h>
-#include <bsp/zynq-uart-regs.h>
-#include <bsp/irq.h>
-
-#include <bspopts.h>
-
-#ifdef ZYNQ_CONSOLE_USE_INTERRUPTS
-static void zynq_uart_interrupt(void *arg)
-{
-  rtems_termios_tty *tty = arg;
-  zynq_uart_context *ctx = rtems_termios_get_device_context(tty);
-  volatile zynq_uart *regs = ctx->regs;
-  uint32_t channel_sts;
-
-  if ((regs->irq_sts & (ZYNQ_UART_TIMEOUT | ZYNQ_UART_RTRIG)) != 0) {
-    regs->irq_sts = ZYNQ_UART_TIMEOUT | ZYNQ_UART_RTRIG;
-
-    do {
-      char c = (char) ZYNQ_UART_TX_RX_FIFO_FIFO_GET(regs->tx_rx_fifo);
-
-      rtems_termios_enqueue_raw_characters(tty, &c, 1);
-
-      channel_sts = regs->channel_sts;
-    } while ((channel_sts & ZYNQ_UART_CHANNEL_STS_REMPTY) == 0);
-  } else {
-    channel_sts = regs->channel_sts;
-  }
-
-  if (ctx->transmitting && (channel_sts & ZYNQ_UART_CHANNEL_STS_TEMPTY) != 0) {
-    rtems_termios_dequeue_characters(tty, 1);
-  }
-}
-#endif
-
-static bool zynq_uart_first_open(
-  rtems_termios_tty *tty,
-  rtems_termios_device_context *base,
-  struct termios *term,
-  rtems_libio_open_close_args_t *args
-)
-{
-#ifdef ZYNQ_CONSOLE_USE_INTERRUPTS
-  zynq_uart_context *ctx = (zynq_uart_context *) base;
-  volatile zynq_uart *regs = ctx->regs;
-  rtems_status_code sc;
-#endif
-
-  rtems_termios_set_initial_baud(tty, ZYNQ_UART_DEFAULT_BAUD);
-  zynq_uart_initialize(base);
-
-#ifdef ZYNQ_CONSOLE_USE_INTERRUPTS
-  regs->rx_timeout = 32;
-  regs->rx_fifo_trg_lvl = ZYNQ_UART_FIFO_DEPTH / 2;
-  regs->irq_dis = 0xffffffff;
-  regs->irq_sts = 0xffffffff;
-  regs->irq_en = ZYNQ_UART_RTRIG | ZYNQ_UART_TIMEOUT;
-  sc = rtems_interrupt_handler_install(
-    ctx->irq,
-    "UART",
-    RTEMS_INTERRUPT_SHARED,
-    zynq_uart_interrupt,
-    tty
-  );
-  if (sc != RTEMS_SUCCESSFUL) {
-    return false;
-  }
-#endif
-
-  return true;
-}
-
-#ifdef ZYNQ_CONSOLE_USE_INTERRUPTS
-static void zynq_uart_last_close(
-  rtems_termios_tty *tty,
-  rtems_termios_device_context *base,
-  rtems_libio_open_close_args_t *args
-)
-{
-  zynq_uart_context *ctx = (zynq_uart_context *) base;
-
-  rtems_interrupt_handler_remove(ctx->irq, zynq_uart_interrupt, tty);
-}
-#endif
-
-static void zynq_uart_write_support(
-  rtems_termios_device_context *base,
-  const char *buf,
-  size_t len
-)
-{
-#ifdef ZYNQ_CONSOLE_USE_INTERRUPTS
-  zynq_uart_context *ctx = (zynq_uart_context *) base;
-  volatile zynq_uart *regs = ctx->regs;
-
-  if (len > 0) {
-    ctx->transmitting = true;
-    regs->irq_sts = ZYNQ_UART_TEMPTY;
-    regs->irq_en = ZYNQ_UART_TEMPTY;
-    regs->tx_rx_fifo = ZYNQ_UART_TX_RX_FIFO_FIFO(buf[0]);
-  } else {
-    ctx->transmitting = false;
-    regs->irq_dis = ZYNQ_UART_TEMPTY;
-  }
-#else
-  ssize_t i;
-
-  for (i = 0; i < len; ++i) {
-    zynq_uart_write_polled(base, buf[i]);
-  }
-#endif
-}
-
-static bool zynq_uart_set_attributes(
-  rtems_termios_device_context *context,
-  const struct termios *term
-)
-{
-#if 0
-  volatile zynq_uart *regs = zynq_uart_get_regs(minor);
-  uint32_t brgr = 0;
-  uint32_t bauddiv = 0;
-  int rc;
-
-  rc = zynq_cal_baud_rate(115200, &brgr, &bauddiv, regs->mode);
-  if (rc != 0)
-    return rc;
-
-  regs->control &= ~(ZYNQ_UART_CONTROL_RXEN | ZYNQ_UART_CONTROL_TXEN);
-  regs->baud_rate_gen = ZYNQ_UART_BAUD_RATE_GEN_CD(brgr);
-  regs->baud_rate_div = ZYNQ_UART_BAUD_RATE_DIV_BDIV(bauddiv);
-  regs->control |= ZYNQ_UART_CONTROL_RXEN | ZYNQ_UART_CONTROL_TXEN;
-
-  return true;
-#else
-  return false;
-#endif
-}
-
-const rtems_termios_device_handler zynq_uart_handler = {
-  .first_open = zynq_uart_first_open,
-  .set_attributes = zynq_uart_set_attributes,
-  .write = zynq_uart_write_support,
-#ifdef ZYNQ_CONSOLE_USE_INTERRUPTS
-  .last_close = zynq_uart_last_close,
-  .mode = TERMIOS_IRQ_DRIVEN
-#else
-  .poll_read = zynq_uart_read_polled,
-  .mode = TERMIOS_POLLED
-#endif
-};