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x86: Add Intel Quark X1000 UART support.

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This patch adds a driver that wraps the generic 16X50 UART driver with
specific support for the two Intel Quark X1000 built-in UARTs.
This commit is contained in:
Michael LeMay 2015-07-03 05:38:17 -07:00 • committed by Jesus Sanchez-Palencia
parent 6acdf50262
commit 15f947fe40
3 changed files with 121 additions and 2 deletions
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75
cpu/x86/drivers/quarkX1000/uart.c Normal file
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/*
* Copyright (C) 2015, Intel Corporation. All rights reserved.
*
* 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.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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 HOLDER 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 "uart.h"
#include "uart-16x50.h"
#include <assert.h>
static uart_16x50_driver_t quarkX1000_uart0;
static uart_16x50_driver_t quarkX1000_uart1;
/* Divisor setting for 115200 baud from section 18.2.2 of Intel Quark SoC
* X1000 Datasheet.
*/
#define QUARK_X1000_UART_DL_115200 24
/*---------------------------------------------------------------------------*/
/**
* \brief Initialize a UART.
* \param dev Device to initialize.
*/
void
quarkX1000_uart_init(quarkX1000_uart_dev_t dev)
{
pci_config_addr_t pci_addr;
assert((dev == QUARK_X1000_UART_0) || (dev == QUARK_X1000_UART_1));
pci_addr.raw = 0;
/* PCI addresses from section 18.4 of Intel Quark SoC X1000 Datasheet. */
pci_addr.dev = 20;
pci_addr.func = (dev == QUARK_X1000_UART_0) ? 1 : 5;
uart_16x50_init((dev == QUARK_X1000_UART_0) ? &quarkX1000_uart0 : &quarkX1000_uart1, pci_addr, QUARK_X1000_UART_DL_115200);
}
/*---------------------------------------------------------------------------*/
/**
* \brief Transmit a character via a UART.
* \param dev Device to use.
* \param c Character to transmit.
*/
void
quarkX1000_uart_tx(quarkX1000_uart_dev_t dev, uint8_t c)
{
assert((dev == QUARK_X1000_UART_0) || (dev == QUARK_X1000_UART_1));
uart_16x50_tx((dev == QUARK_X1000_UART_0) ? quarkX1000_uart0 : quarkX1000_uart1, c);
}
/*---------------------------------------------------------------------------*/