diff options
author | Hesham ALMatary <heshamelmatary@gmail.com> | 2015-04-18 17:25:51 +0100 |
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committer | Gedare Bloom <gedare@rtems.org> | 2015-04-19 06:26:36 -0400 |
commit | 3d597c04ed42d61fcd22a42f1d68c4b1621334fe (patch) | |
tree | ff0951ca63f0ff5c8cd432fa63aafffd677ca078 /c/src/lib/libbsp/or1k/or1ksim/console/uart.c | |
parent | sp13: Document message buffer usage and adjust configuration (diff) | |
download | rtems-3d597c04ed42d61fcd22a42f1d68c4b1621334fe.tar.bz2 |
Rename or1ksim BSP to generic_or1k
or1ksim BSP was initially named after or1ksim simulator, and it was
intented to only run there. But now it can also run on QEMU, jor1k and
real FPGA boards without modifications. It makes more sense to give
it a new generic name like generic_or1k.
Diffstat (limited to 'c/src/lib/libbsp/or1k/or1ksim/console/uart.c')
-rw-r--r-- | c/src/lib/libbsp/or1k/or1ksim/console/uart.c | 152 |
1 files changed, 0 insertions, 152 deletions
diff --git a/c/src/lib/libbsp/or1k/or1ksim/console/uart.c b/c/src/lib/libbsp/or1k/or1ksim/console/uart.c deleted file mode 100644 index 87b1aeaa07..0000000000 --- a/c/src/lib/libbsp/or1k/or1ksim/console/uart.c +++ /dev/null @@ -1,152 +0,0 @@ -/** - * @file - * - * @ingroup or1ksim_uart - * - * @brief UART support. - */ - -/* - * COPYRIGHT (c) 2014 Hesham ALMatary <heshamelmatary@gmail.com> - * - * 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 <libchip/sersupp.h> -#include <bsp/or1ksim.h> -#include <bsp.h> -#include <bsp/irq.h> -#include <bsp/uart.h> -#include <rtems/score/isr.h> - -static void uart_initialize(int minor); -static int uart_first_open(int major, int minor, void *arg); -static int uart_last_close(int major, int minor, void *arg); -static int uart_read_polled(int minor); -static ssize_t uart_write(int minor, const char *buf, size_t len); -static void uart_write_polled(int minor, char c); -static int uart_set_attributes(int minor, const struct termios *t); - -#if 0 -/* - * These will be useful when the driver supports interrupt driven IO. - */ -static rtems_vector_number uart_get_irq_number(const console_tbl *ct) -{ - return ct->ulIntVector; -} - -static uint32_t uart_get_baud(const console_tbl *ct) -{ - return ct->ulClock; -} -#endif - -static void uart_set_baud(int baud) -{ - uint16_t divisor = (OR1KSIM_BSP_CLOCK_FREQ) / (16 * baud); - OR1KSIM_REG(OR1KSIM_BSP_UART_REG_LINE_CTRL) = - OR1KSIM_BSP_UART_REG_LINE_CTRL_DLAB; - - OR1KSIM_REG(OR1KSIM_BSP_UART_REG_DEV_LATCH_LOW) = divisor & 0xff; - - OR1KSIM_REG(OR1KSIM_BSP_UART_REG_DEV_LATCH_HIGH) = - (divisor >> 8); -} - -static void uart_initialize(int minor) -{ - /* Set baud rate */ - uart_set_baud(OR1KSIM_UART_DEFAULT_BAUD); - - /* Set data pattern configuration */ - OR1KSIM_REG(OR1KSIM_BSP_UART_REG_LINE_CTRL) = - OR1KSIM_BSP_UART_REG_LINE_CTRL_WLEN8; - - /* Reset receiver and transmitter */ - OR1KSIM_REG(OR1KSIM_BSP_UART_REG_FIFO_CTRL) = - OR1KSIM_BSP_UART_REG_FIFO_CTRL_ENABLE_FIFO | - OR1KSIM_BSP_UART_REG_FIFO_CTRL_CLEAR_RCVR | - OR1KSIM_BSP_UART_REG_FIFO_CTRL_TRIGGER_14; - - /* Disable all interrupts */ - OR1KSIM_REG(OR1KSIM_BSP_UART_REG_INT_ENABLE) = 0x00; - -} - -static int uart_first_open(int major, int minor, void *arg) -{ - rtems_libio_open_close_args_t *oc = (rtems_libio_open_close_args_t *) arg; - struct rtems_termios_tty *tty = (struct rtems_termios_tty *) oc->iop->data1; - const console_tbl *ct = Console_Port_Tbl [minor]; - console_data *cd = &Console_Port_Data [minor]; - - cd->termios_data = tty; - rtems_termios_set_initial_baud(tty, ct->ulClock); - - return 0; -} - -static int uart_last_close(int major, int minor, void *arg) -{ - return 0; -} - -static int uart_read_polled(int minor) -{ - unsigned char lsr; - - /* Get a character when avaiable */ - do { - lsr = OR1KSIM_REG(OR1KSIM_BSP_UART_REG_LINE_STATUS); - } while ((lsr & OR1KSIM_BSP_UART_REG_LINE_STATUS_DR) - != OR1KSIM_BSP_UART_REG_LINE_STATUS_DR); - - return OR1KSIM_REG(OR1KSIM_BSP_UART_REG_RX); -} - -static void uart_write_polled(int minor, char c) -{ - unsigned char lsr; - - /* Wait until there is no pending data in the transmitter FIFO (empty) */ - do { - lsr = OR1KSIM_REG(OR1KSIM_BSP_UART_REG_LINE_STATUS); - } while (!(lsr & OR1KSIM_BSP_UART_REG_LINE_STATUS_THRE)); - - OR1KSIM_REG(OR1KSIM_BSP_UART_REG_TX) = c; -} - -static ssize_t uart_write( - int minor, - const char *s, - size_t n -) -{ - ssize_t i = 0; - - for (i = 0; i < n; ++i){ - uart_write_polled(minor, s [i]); - } - - return n; -} - -static int uart_set_attributes(int minor, const struct termios *term) -{ - return -1; -} - -const console_fns or1ksim_uart_fns = { - .deviceProbe = libchip_serial_default_probe, - .deviceFirstOpen = uart_first_open, - .deviceLastClose = uart_last_close, - .deviceRead = uart_read_polled, - .deviceWrite = uart_write, - .deviceInitialize = uart_initialize, - .deviceWritePolled = uart_write_polled, - .deviceSetAttributes = uart_set_attributes, - .deviceOutputUsesInterrupts = false -}; |