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drivers: Introduce Silabs leuart shim serial driver

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Adds the Low Energy UART shim serial driver for Silabs Gecko Devices.

Signed-off-by: Diego Sueiro <diego.sueiro@gmail.com>
This commit is contained in:
Diego Sueiro 2018-10-30 18:26:25 +00:00 • committed by Kumar Gala
commit 3b0260939c
5 changed files with 423 additions and 0 deletions
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1
drivers/serial/CMakeLists.txt
View file

@ -6,6 +6,7 @@ zephyr_library_sources_if_kconfig(uart_cmsdk_apb.c)
zephyr_library_sources_if_kconfig(uart_esp32.c)
zephyr_library_sources_if_kconfig(uart_sifive.c)
zephyr_library_sources_if_kconfig(uart_gecko.c)
zephyr_library_sources_if_kconfig(leuart_gecko.c)
zephyr_library_sources_if_kconfig(uart_mcux.c)
zephyr_library_sources_if_kconfig(uart_mcux_lpuart.c)
zephyr_library_sources_if_kconfig(uart_mcux_lpsci.c)

2
drivers/serial/Kconfig
View file

@ -99,6 +99,8 @@ source "drivers/serial/Kconfig.esp32"
source "drivers/serial/Kconfig.gecko"
source "drivers/serial/Kconfig.leuart_gecko"
source "drivers/serial/Kconfig.msp432p4xx"
source "drivers/serial/Kconfig.sam0"

31
drivers/serial/Kconfig.leuart_gecko Normal file
View file

@ -0,0 +1,31 @@
# Kconfig - Gecko SDK LEUART
#
# Copyright (c) 2018, Diego Sueiro
#
# SPDX-License-Identifier: Apache-2.0
#
menuconfig LEUART_GECKO
bool "Gecko leuart driver"
depends on HAS_SILABS_GECKO
depends on GPIO_GECKO
select SERIAL_HAS_DRIVER
select SERIAL_SUPPORT_INTERRUPT
help
Enable the Gecko leuart driver.
if LEUART_GECKO
config LEUART_GECKO_0
bool "Enable Gecko Low Energy UART 0"
help
Enable support for Gecko LEUART0 port in the driver. Say y here if you
want to use LEUART0 device.
config LEUART_GECKO_1
bool "Enable Gecko Low Energy UART 1"
help
Enable support for Gecko LEUART1 port in the driver. Say y here if you
want to use LEUART1 device.
endif # LEUART_GECKO

388
drivers/serial/leuart_gecko.c Normal file
View file

@ -0,0 +1,388 @@
/*
* Copyright (c) 2018, Christian Taedcke, Diego Sueiro
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <errno.h>
#include <uart.h>
#include <em_leuart.h>
#include <em_gpio.h>
#include <em_cmu.h>
#include <board.h>
#define DEV_CFG(dev) \
((const struct leuart_gecko_config * const)(dev)->config->config_info)
#define DEV_DATA(dev) \
((struct leuart_gecko_data * const)(dev)->driver_data)
#define DEV_BASE(dev) \
((LEUART_TypeDef *)(DEV_CFG(dev))->base)
struct leuart_gecko_config {
LEUART_TypeDef *base;
CMU_Clock_TypeDef clock;
u32_t baud_rate;
struct soc_gpio_pin pin_rx;
struct soc_gpio_pin pin_tx;
unsigned int loc;
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
void (*irq_config_func)(struct device *dev);
#endif
};
struct leuart_gecko_data {
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
uart_irq_callback_user_data_t callback;
void *cb_data;
#endif
};
static int leuart_gecko_poll_in(struct device *dev, unsigned char *c)
{
LEUART_TypeDef *base = DEV_BASE(dev);
u32_t flags = LEUART_StatusGet(base);
if (flags & LEUART_STATUS_RXDATAV) {
*c = LEUART_Rx(base);
return 0;
}
return -1;
}
static unsigned char leuart_gecko_poll_out(struct device *dev, unsigned char c)
{
LEUART_TypeDef *base = DEV_BASE(dev);
/* LEUART_Tx function already waits for the transmit buffer being empty
* and and waits for the bus to be free to transmit.
*/
LEUART_Tx(base, c);
return c;
}
static int leuart_gecko_err_check(struct device *dev)
{
LEUART_TypeDef *base = DEV_BASE(dev);
u32_t flags = LEUART_IntGet(base);
int err = 0;
if (flags & LEUART_IF_RXOF) {
err |= UART_ERROR_OVERRUN;
}
if (flags & LEUART_IF_PERR) {
err |= UART_ERROR_PARITY;
}
if (flags & LEUART_IF_FERR) {
err |= UART_ERROR_FRAMING;
}
LEUART_IntClear(base, LEUART_IF_RXOF |
LEUART_IF_PERR |
LEUART_IF_FERR);
return err;
}
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
static int leuart_gecko_fifo_fill(struct device *dev, const u8_t *tx_data,
int len)
{
LEUART_TypeDef *base = DEV_BASE(dev);
u8_t num_tx = 0;
while ((len - num_tx > 0) &&
(base->STATUS & LEUART_STATUS_TXBL)) {
base->TXDATA = (u32_t)tx_data[num_tx++];
}
return num_tx;
}
static int leuart_gecko_fifo_read(struct device *dev, u8_t *rx_data,
const int len)
{
LEUART_TypeDef *base = DEV_BASE(dev);
u8_t num_rx = 0;
while ((len - num_rx > 0) &&
(base->STATUS & LEUART_STATUS_RXDATAV)) {
rx_data[num_rx++] = (u8_t)base->RXDATA;
}
return num_rx;
}
static void leuart_gecko_irq_tx_enable(struct device *dev)
{
LEUART_TypeDef *base = DEV_BASE(dev);
u32_t mask = LEUART_IEN_TXBL | LEUART_IEN_TXC;
LEUART_IntEnable(base, mask);
}
static void leuart_gecko_irq_tx_disable(struct device *dev)
{
LEUART_TypeDef *base = DEV_BASE(dev);
u32_t mask = LEUART_IEN_TXBL | LEUART_IEN_TXC;
LEUART_IntDisable(base, mask);
}
static int leuart_gecko_irq_tx_complete(struct device *dev)
{
LEUART_TypeDef *base = DEV_BASE(dev);
u32_t flags = LEUART_IntGet(base);
return (flags & LEUART_IF_TXC) != 0;
}
static int leuart_gecko_irq_tx_ready(struct device *dev)
{
LEUART_TypeDef *base = DEV_BASE(dev);
u32_t flags = LEUART_IntGet(base);
return (flags & LEUART_IF_TXBL) != 0;
}
static void leuart_gecko_irq_rx_enable(struct device *dev)
{
LEUART_TypeDef *base = DEV_BASE(dev);
u32_t mask = LEUART_IEN_RXDATAV;
LEUART_IntEnable(base, mask);
}
static void leuart_gecko_irq_rx_disable(struct device *dev)
{
LEUART_TypeDef *base = DEV_BASE(dev);
u32_t mask = LEUART_IEN_RXDATAV;
LEUART_IntDisable(base, mask);
}
static int leuart_gecko_irq_rx_full(struct device *dev)
{
LEUART_TypeDef *base = DEV_BASE(dev);
u32_t flags = LEUART_IntGet(base);
return (flags & LEUART_IF_RXDATAV) != 0;
}
static int leuart_gecko_irq_rx_ready(struct device *dev)
{
LEUART_TypeDef *base = DEV_BASE(dev);
u32_t mask = LEUART_IEN_RXDATAV;
return (base->IEN & mask)
&& leuart_gecko_irq_rx_full(dev);
}
static void leuart_gecko_irq_err_enable(struct device *dev)
{
LEUART_TypeDef *base = DEV_BASE(dev);
LEUART_IntEnable(base, LEUART_IF_RXOF |
LEUART_IF_PERR |
LEUART_IF_FERR);
}
static void leuart_gecko_irq_err_disable(struct device *dev)
{
LEUART_TypeDef *base = DEV_BASE(dev);
LEUART_IntDisable(base, LEUART_IF_RXOF |
LEUART_IF_PERR |
LEUART_IF_FERR);
}
static int leuart_gecko_irq_is_pending(struct device *dev)
{
return leuart_gecko_irq_tx_ready(dev) || leuart_gecko_irq_rx_ready(dev);
}
static int leuart_gecko_irq_update(struct device *dev)
{
return 1;
}
static void leuart_gecko_irq_callback_set(struct device *dev,
uart_irq_callback_user_data_t cb,
void *cb_data)
{
struct leuart_gecko_data *data = dev->driver_data;
data->callback = cb;
data->cb_data = cb_data;
}
static void leuart_gecko_isr(void *arg)
{
struct device *dev = arg;
struct leuart_gecko_data *data = dev->driver_data;
if (data->callback) {
data->callback(data->cb_data);
}
}
#endif /* CONFIG_UART_INTERRUPT_DRIVEN */
static void leuart_gecko_init_pins(struct device *dev)
{
const struct leuart_gecko_config *config = DEV_CFG(dev);
LEUART_TypeDef *base = DEV_BASE(dev);
soc_gpio_configure(&config->pin_rx);
soc_gpio_configure(&config->pin_tx);
#ifdef _LEUART_ROUTEPEN_MASK
base->ROUTEPEN = LEUART_ROUTEPEN_RXPEN | LEUART_ROUTEPEN_TXPEN;
base->ROUTELOC0 = (base->ROUTELOC0
& ~(_LEUART_ROUTELOC0_TXLOC_MASK
| _LEUART_ROUTELOC0_RXLOC_MASK))
| (config->loc <<
_LEUART_ROUTELOC0_TXLOC_SHIFT)
| (config->loc <<
_LEUART_ROUTELOC0_RXLOC_SHIFT);
#else
base->ROUTE = LEUART_ROUTE_RXPEN | LEUART_ROUTE_TXPEN
| (config->loc << 8);
#endif
}
static int leuart_gecko_init(struct device *dev)
{
const struct leuart_gecko_config *config = DEV_CFG(dev);
LEUART_TypeDef *base = DEV_BASE(dev);
LEUART_Init_TypeDef leuartInit = LEUART_INIT_DEFAULT;
/* The peripheral and gpio clock are already enabled from soc and gpio
* driver
*/
leuartInit.baudrate = config->baud_rate;
/* Enable LEUART clock */
CMU_ClockEnable(config->clock, true);
/* Enable CORE LE clock in order to access LE modules */
CMU_ClockEnable(cmuClock_CORELE, true);
/* Select LFXO for LEUARTs (and wait for it to stabilize) */
CMU_ClockSelectSet(cmuClock_LFB, cmuSelect_LFXO);
/* Init LEUART */
LEUART_Init(base, &leuartInit);
/* Initialize LEUART pins */
leuart_gecko_init_pins(dev);
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
config->irq_config_func(dev);
#endif
return 0;
}
static const struct uart_driver_api leuart_gecko_driver_api = {
.poll_in = leuart_gecko_poll_in,
.poll_out = leuart_gecko_poll_out,
.err_check = leuart_gecko_err_check,
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
.fifo_fill = leuart_gecko_fifo_fill,
.fifo_read = leuart_gecko_fifo_read,
.irq_tx_enable = leuart_gecko_irq_tx_enable,
.irq_tx_disable = leuart_gecko_irq_tx_disable,
.irq_tx_complete = leuart_gecko_irq_tx_complete,
.irq_tx_ready = leuart_gecko_irq_tx_ready,
.irq_rx_enable = leuart_gecko_irq_rx_enable,
.irq_rx_disable = leuart_gecko_irq_rx_disable,
.irq_rx_ready = leuart_gecko_irq_rx_ready,
.irq_err_enable = leuart_gecko_irq_err_enable,
.irq_err_disable = leuart_gecko_irq_err_disable,
.irq_is_pending = leuart_gecko_irq_is_pending,
.irq_update = leuart_gecko_irq_update,
.irq_callback_set = leuart_gecko_irq_callback_set,
#endif
};
#ifdef CONFIG_LEUART_GECKO_0
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
static void leuart_gecko_config_func_0(struct device *dev);
#endif
static const struct leuart_gecko_config leuart_gecko_0_config = {
.base = (LEUART_TypeDef *)CONFIG_LEUART_GECKO_0_BASE_ADDRESS,
.clock = cmuClock_LEUART0,
.baud_rate = CONFIG_LEUART_GECKO_0_CURRENT_SPEED,
.pin_rx = PIN_LEUART0_RXD,
.pin_tx = PIN_LEUART0_TXD,
.loc = CONFIG_LEUART_GECKO_0_LOCATION,
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
.irq_config_func = leuart_gecko_config_func_0,
#endif
};
static struct leuart_gecko_data leuart_gecko_0_data;
DEVICE_AND_API_INIT(leuart_0, CONFIG_LEUART_GECKO_0_LABEL, &leuart_gecko_init,
&leuart_gecko_0_data, &leuart_gecko_0_config, PRE_KERNEL_1,
CONFIG_KERNEL_INIT_PRIORITY_DEVICE,
&leuart_gecko_driver_api);
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
static void leuart_gecko_config_func_0(struct device *dev)
{
IRQ_CONNECT(CONFIG_LEUART_GECKO_0_IRQ,
CONFIG_LEUART_GECKO_0_IRQ_PRIORITY, leuart_gecko_isr,
DEVICE_GET(leuart_0), 0);
irq_enable(CONFIG_LEUART_GECKO_0_IRQ);
}
#endif
#endif /* CONFIG_LEUART_GECKO_0 */
#ifdef CONFIG_LEUART_GECKO_1
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
static void leuart_gecko_config_func_1(struct device *dev);
#endif
static const struct leuart_gecko_config leuart_gecko_1_config = {
.base = (LEUART_TypeDef *)CONFIG_LEUART_GECKO_1_BASE_ADDRESS,
.clock = cmuClock_LEUART0,
.baud_rate = CONFIG_LEUART_GECKO_1_CURRENT_SPEED,
.pin_rx = PIN_LEUART1_RXD,
.pin_tx = PIN_LEUART1_TXD,
.loc = CONFIG_LEUART_GECKO_1_LOCATION,
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
.irq_config_func = leuart_gecko_config_func_1,
#endif
};
static struct leuart_gecko_data leuart_gecko_1_data;
DEVICE_AND_API_INIT(leuart_1, CONFIG_LEUART_GECKO_1_LABEL, &leuart_gecko_init,
&leuart_gecko_1_data, &leuart_gecko_1_config, PRE_KERNEL_1,
CONFIG_KERNEL_INIT_PRIORITY_DEVICE,
&leuart_gecko_driver_api);
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
static void leuart_gecko_config_func_1(struct device *dev)
{
IRQ_CONNECT(CONFIG_LEUART_GECKO_1_IRQ,
CONFIG_LEUART_GECKO_1_IRQ_PRIORITY, leuart_gecko_isr,
DEVICE_GET(leuart_1), 0);
irq_enable(CONFIG_LEUART_GECKO_1_IRQ);
}
#endif
#endif /* CONFIG_LEUART_GECKO_1 */

1
ext/hal/silabs/gecko/CMakeLists.txt
View file

@ -27,6 +27,7 @@ zephyr_sources_ifdef(CONFIG_HAS_CMU emlib/src/em_cmu.c)
zephyr_sources_ifdef(CONFIG_HAS_EMU emlib/src/em_emu.c)
zephyr_sources_ifdef(CONFIG_GPIO_GECKO emlib/src/em_gpio.c)
zephyr_sources_ifdef(CONFIG_UART_GECKO emlib/src/em_usart.c)
zephyr_sources_ifdef(CONFIG_LEUART_GECKO emlib/src/em_leuart.c)
zephyr_sources_ifdef(CONFIG_SOC_SERIES_EFM32WG Device/SiliconLabs/EFM32WG/Source/system_efm32wg.c)
zephyr_sources_ifdef(CONFIG_SOC_SERIES_EFR32FG1P Device/SiliconLabs/EFR32FG1P/Source/system_efr32fg1p.c)
zephyr_sources_ifdef(CONFIG_SOC_SERIES_EFM32HG Device/SiliconLabs/EFM32HG/Source/system_efm32hg.c)