On Sun, Apr 3, 2016 at 8:10 AM, Eddy Petrișor eddy.petrisor@gmail.com wrote:
From: Stoica Cosmin-Stefan cosminstefan.stoica@freescale.com
The Linflex module is integrated on some NXP automotive SoCs part of the former Freescale portfolio, like S32V234, an SoC for Advanced Driver Assistance Systems.
Signed-off-by: Stoica Cosmin-Stefan cosminstefan.stoica@freescale.com Signed-off-by: Chircu Bogdan Bogdan.Chircu@freescale.com Signed-off-by: Depons Eric eric.depons@freescale.com Signed-off-by: Eddy Petrișor eddy.petrisor@gmail.com
drivers/serial/Makefile | 1 + drivers/serial/serial_linflexuart.c | 147 ++++++++++++++++++++++++++++++++++++ 2 files changed, 148 insertions(+) create mode 100644 drivers/serial/serial_linflexuart.c
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile index ee7147a..b009478 100644 --- a/drivers/serial/Makefile +++ b/drivers/serial/Makefile @@ -33,6 +33,7 @@ obj-$(CONFIG_SCIF_CONSOLE) += serial_sh.o obj-$(CONFIG_ZYNQ_SERIAL) += serial_zynq.o obj-$(CONFIG_BFIN_SERIAL) += serial_bfin.o obj-$(CONFIG_FSL_LPUART) += serial_lpuart.o +obj-$(CONFIG_FSL_LINFLEXUART) += serial_linflexuart.o obj-$(CONFIG_ARC_SERIAL) += serial_arc.o obj-$(CONFIG_UNIPHIER_SERIAL) += serial_uniphier.o obj-$(CONFIG_STM32_SERIAL) += serial_stm32.o diff --git a/drivers/serial/serial_linflexuart.c b/drivers/serial/serial_linflexuart.c new file mode 100644 index 0000000..3c619ce --- /dev/null +++ b/drivers/serial/serial_linflexuart.c @@ -0,0 +1,147 @@ +/*
- (C) Copyright 2013-2016 Freescale Semiconductor, Inc.
- SPDX-License-Identifier: GPL-2.0+
- */
+#include <common.h> +#include <watchdog.h> +#include <asm/io.h> +#include <serial.h> +#include <linux/compiler.h> +#include <asm/arch/imx-regs.h> +#include <asm/arch/clock.h>
+#define US1_TDRE (1 << 7) +#define US1_RDRF (1 << 5) +#define UC2_TE (1 << 3) +#define LINCR1_INIT (1 << 0) +#define LINCR1_MME (1 << 4) +#define LINCR1_BF (1 << 7) +#define LINSR_LINS_INITMODE (0x00001000) +#define LINSR_LINS_MASK (0x0000F000) +#define UARTCR_UART (1 << 0) +#define UARTCR_WL0 (1 << 1) +#define UARTCR_PCE (1 << 2) +#define UARTCR_PC0 (1 << 3) +#define UARTCR_TXEN (1 << 4) +#define UARTCR_RXEN (1 << 5) +#define UARTCR_PC1 (1 << 6) +#define UARTSR_DTF (1 << 1) +#define UARTSR_DRF (1 << 2) +#define UARTSR_RMB (1 << 9)
+DECLARE_GLOBAL_DATA_PTR;
+struct linflex_fsl *base = (struct linflex_fsl *)LINFLEXUART_BASE;
+static void linflex_serial_setbrg(void) +{
u32 clk = mxc_get_clock(MXC_UART_CLK);u32 ibr, fbr;if (!gd->baudrate)gd->baudrate = CONFIG_BAUDRATE;ibr = (u32) (clk / (16 * gd->baudrate));fbr = (u32) (clk % (16 * gd->baudrate)) * 16;__raw_writel(ibr, &base->linibrr);__raw_writel(fbr, &base->linfbrr);+}
+static int linflex_serial_getc(void) +{
char c;/* waiting for data reception complete - TODO: add a timeout */while ((__raw_readb(&base->uartsr) & UARTSR_DRF) != UARTSR_DRF);/* waiting for data buffer to be ready - TODO: add a timeout */while ((__raw_readl(&base->uartsr) & UARTSR_RMB) != UARTSR_RMB);c = __raw_readl(&base->bdrm);__raw_writeb((__raw_readb(&base->uartsr) | (UARTSR_DRF | UARTSR_RMB)),&base->uartsr);return c;+}
+static void linflex_serial_putc(const char c) +{
if (c == '\n')serial_putc('\r');
Please remove this \n \r handling.
__raw_writeb(c, &base->bdrl);/* waiting for data transmission completed - TODO: add a timeout */while ((__raw_readb(&base->uartsr) & UARTSR_DTF) != UARTSR_DTF);__raw_writeb((__raw_readb(&base->uartsr) | UARTSR_DTF), &base->uartsr);+}
+/*
- Test whether a character is in the RX buffer
- */
+static int linflex_serial_tstc(void) +{
return 0;+}
+/*
- Initialise the serial port with the given baudrate. The settings
- are always 8 data bits, no parity, 1 stop bit, no start bits.
- */
+static int linflex_serial_init(void) +{
volatile u32 ctrl;/* set the Linflex in master mode amd activate by-pass filter */ctrl = LINCR1_BF | LINCR1_MME;__raw_writel(ctrl, &base->lincr1);/* init mode */ctrl |= LINCR1_INIT;__raw_writel(ctrl, &base->lincr1);/* waiting for init mode entry - TODO: add a timeout */while ((__raw_readl(&base->linsr) & LINSR_LINS_MASK) !=LINSR_LINS_INITMODE);/* set UART bit to allow writing other bits */__raw_writel(UARTCR_UART, &base->uartcr);/* provide data bits, parity, stop bit, etc */serial_setbrg();/* 8 bit data, no parity, Tx and Rx enabled, UART mode */__raw_writel(UARTCR_PC1 | UARTCR_RXEN | UARTCR_TXEN | UARTCR_PC0| UARTCR_WL0 | UARTCR_UART, &base->uartcr);ctrl = __raw_readl(&base->lincr1);ctrl &= ~LINCR1_INIT;__raw_writel(ctrl, &base->lincr1); /* end init mode */return 0;+}
+static struct serial_device linflex_serial_drv = {
.name = "linflex_serial",.start = linflex_serial_init,.stop = NULL,.setbrg = linflex_serial_setbrg,.putc = linflex_serial_putc,.puts = default_serial_puts,.getc = linflex_serial_getc,.tstc = linflex_serial_tstc,+};
+void linflex_serial_initialize(void) +{
serial_register(&linflex_serial_drv);+}
+__weak struct serial_device *default_serial_console(void) +{
return &linflex_serial_drv;+}
You should really start creating DM serial driver. Non-DM serial driver is not going to be accepted.
Regards, Bin