This patch adds MX3 support for the i.MX internal uart driver.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
# Object file lists.
-obj-y := mm.o time.o clock.o
+obj-y := mm.o time.o clock.o devices.o
obj-$(CONFIG_MACH_MX31ADS) += mx31ads.o
--- /dev/null
+/*
+ * Copyright 2006-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright 2008 Sascha Hauer, kernel@pengutronix.de
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/serial.h>
+#include <asm/hardware.h>
+#include <asm/arch/imx-uart.h>
+
+static struct resource uart0[] = {
+ {
+ .start = UART1_BASE_ADDR,
+ .end = UART1_BASE_ADDR + 0x0B5,
+ .flags = IORESOURCE_MEM,
+ }, {
+ .start = MXC_INT_UART1,
+ .end = MXC_INT_UART1,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct platform_device mxc_uart_device0 = {
+ .name = "imx-uart",
+ .id = 0,
+ .resource = uart0,
+ .num_resources = ARRAY_SIZE(uart0),
+};
+
+static struct resource uart1[] = {
+ {
+ .start = UART2_BASE_ADDR,
+ .end = UART2_BASE_ADDR + 0x0B5,
+ .flags = IORESOURCE_MEM,
+ }, {
+ .start = MXC_INT_UART2,
+ .end = MXC_INT_UART2,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct platform_device mxc_uart_device1 = {
+ .name = "imx-uart",
+ .id = 1,
+ .resource = uart1,
+ .num_resources = ARRAY_SIZE(uart1),
+};
+
+static struct resource uart2[] = {
+ {
+ .start = UART3_BASE_ADDR,
+ .end = UART3_BASE_ADDR + 0x0B5,
+ .flags = IORESOURCE_MEM,
+ }, {
+ .start = MXC_INT_UART3,
+ .end = MXC_INT_UART3,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct platform_device mxc_uart_device2 = {
+ .name = "imx-uart",
+ .id = 2,
+ .resource = uart2,
+ .num_resources = ARRAY_SIZE(uart2),
+};
+
+static struct resource uart3[] = {
+ {
+ .start = UART4_BASE_ADDR,
+ .end = UART4_BASE_ADDR + 0x0B5,
+ .flags = IORESOURCE_MEM,
+ }, {
+ .start = MXC_INT_UART4,
+ .end = MXC_INT_UART4,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct platform_device mxc_uart_device3 = {
+ .name = "imx-uart",
+ .id = 3,
+ .resource = uart3,
+ .num_resources = ARRAY_SIZE(uart3),
+};
+
+static struct resource uart4[] = {
+ {
+ .start = UART5_BASE_ADDR,
+ .end = UART5_BASE_ADDR + 0x0B5,
+ .flags = IORESOURCE_MEM,
+ }, {
+ .start = MXC_INT_UART5,
+ .end = MXC_INT_UART5,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct platform_device mxc_uart_device4 = {
+ .name = "imx-uart",
+ .id = 4,
+ .resource = uart4,
+ .num_resources = ARRAY_SIZE(uart4),
+};
+
+/*
+ * Register only those UARTs that physically exist
+ */
+int __init imx_init_uart(int uart_no, struct imxuart_platform_data *pdata)
+{
+ switch (uart_no) {
+ case 0:
+ mxc_uart_device0.dev.platform_data = pdata;
+ platform_device_register(&mxc_uart_device0);
+ break;
+ case 1:
+ mxc_uart_device1.dev.platform_data = pdata;
+ platform_device_register(&mxc_uart_device1);
+ break;
+ case 2:
+ mxc_uart_device2.dev.platform_data = pdata;
+ platform_device_register(&mxc_uart_device2);
+ break;
+ case 3:
+ mxc_uart_device3.dev.platform_data = pdata;
+ platform_device_register(&mxc_uart_device3);
+ break;
+ case 4:
+ mxc_uart_device4.dev.platform_data = pdata;
+ platform_device_register(&mxc_uart_device4);
+ break;
+ default:
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
config SERIAL_IMX
bool "IMX serial port support"
- depends on ARM && ARCH_IMX
+ depends on ARM && (ARCH_IMX || ARCH_MXC)
select SERIAL_CORE
help
If you have a machine based on a Motorola IMX CPU you
#define UBIR 0xa4 /* BRM Incremental Register */
#define UBMR 0xa8 /* BRM Modulator Register */
#define UBRC 0xac /* Baud Rate Count Register */
+#ifdef CONFIG_ARCH_MX3
+#define ONEMS 0xb0 /* One Millisecond register */
+#define UTS 0xb4 /* UART Test Register */
+#endif
+#ifdef CONFIG_ARCH_IMX
#define BIPR1 0xb0 /* Incremental Preset Register 1 */
#define BIPR2 0xb4 /* Incremental Preset Register 2 */
#define BIPR3 0xb8 /* Incremental Preset Register 3 */
#define BMPR3 0xc8 /* BRM Modulator Register 3 */
#define BMPR4 0xcc /* BRM Modulator Register 4 */
#define UTS 0xd0 /* UART Test Register */
+#endif
/* UART Control Register Bit Fields.*/
#define URXD_CHARRDY (1<<15)
#define UCR1_RTSDEN (1<<5) /* RTS delta interrupt enable */
#define UCR1_SNDBRK (1<<4) /* Send break */
#define UCR1_TDMAEN (1<<3) /* Transmitter ready DMA enable */
+#ifdef CONFIG_ARCH_IMX
#define UCR1_UARTCLKEN (1<<2) /* UART clock enabled */
+#endif
+#ifdef CONFIG_ARCH_MX3
+#define UCR1_UARTCLKEN (0) /* not present on mx2/mx3 */
+#endif
#define UCR1_DOZE (1<<1) /* Doze */
#define UCR1_UARTEN (1<<0) /* UART enabled */
#define UCR2_ESCI (1<<15) /* Escape seq interrupt enable */
#define UTS_SOFTRST (1<<0) /* Software reset */
/* We've been assigned a range on the "Low-density serial ports" major */
+#ifdef CONFIG_ARCH_IMX
#define SERIAL_IMX_MAJOR 204
#define MINOR_START 41
+#define DEV_NAME "ttySMX"
+#define MAX_INTERNAL_IRQ IMX_IRQS
+#endif
+
+#ifdef CONFIG_ARCH_MX3
+#define SERIAL_IMX_MAJOR 207
+#define MINOR_START 16
+#define DEV_NAME "ttymxc"
+#define MAX_INTERNAL_IRQ MXC_MAX_INT_LINES
+#endif
/*
* This determines how often we check the modem status signals
return IRQ_HANDLED;
}
+static irqreturn_t imx_int(int irq, void *dev_id)
+{
+ struct imx_port *sport = dev_id;
+ unsigned int sts;
+
+ sts = readl(sport->port.membase + USR1);
+
+ if (sts & USR1_RRDY)
+ imx_rxint(irq, dev_id);
+
+ if (sts & USR1_TRDY &&
+ readl(sport->port.membase + UCR1) & UCR1_TXMPTYEN)
+ imx_txint(irq, dev_id);
+
+ if (sts & USR1_RTSS)
+ imx_rtsint(irq, dev_id);
+
+ return IRQ_HANDLED;
+}
+
/*
* Return TIOCSER_TEMT when transmitter is not busy.
*/
writel(temp & ~UCR4_DREN, sport->port.membase + UCR4);
/*
- * Allocate the IRQ
+ * Allocate the IRQ(s) i.MX1 has three interrupts whereas later
+ * chips only have one interrupt.
*/
- retval = request_irq(sport->rxirq, imx_rxint, 0,
- DRIVER_NAME, sport);
- if (retval) goto error_out1;
-
- retval = request_irq(sport->txirq, imx_txint, 0,
- DRIVER_NAME, sport);
- if (retval) goto error_out2;
-
- retval = request_irq(sport->rtsirq, imx_rtsint,
- (sport->rtsirq < IMX_IRQS) ? 0 :
+ if (sport->txirq > 0) {
+ retval = request_irq(sport->rxirq, imx_rxint, 0,
+ DRIVER_NAME, sport);
+ if (retval)
+ goto error_out1;
+
+ retval = request_irq(sport->txirq, imx_txint, 0,
+ DRIVER_NAME, sport);
+ if (retval)
+ goto error_out2;
+
+ retval = request_irq(sport->rtsirq, imx_rtsint,
+ (sport->rtsirq < MAX_INTERNAL_IRQ) ? 0 :
IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
- DRIVER_NAME, sport);
- if (retval) goto error_out3;
+ DRIVER_NAME, sport);
+ if (retval)
+ goto error_out3;
+ } else {
+ retval = request_irq(sport->port.irq, imx_int, 0,
+ DRIVER_NAME, sport);
+ if (retval) {
+ free_irq(sport->port.irq, sport);
+ goto error_out1;
+ }
+ }
/*
* Finally, clear and enable interrupts
return 0;
error_out3:
- free_irq(sport->txirq, sport);
+ if (sport->txirq)
+ free_irq(sport->txirq, sport);
error_out2:
- free_irq(sport->rxirq, sport);
+ if (sport->rxirq)
+ free_irq(sport->rxirq, sport);
error_out1:
return retval;
}
/*
* Free the interrupts
*/
- free_irq(sport->rtsirq, sport);
- free_irq(sport->txirq, sport);
- free_irq(sport->rxirq, sport);
+ if (sport->txirq > 0) {
+ free_irq(sport->rtsirq, sport);
+ free_irq(sport->txirq, sport);
+ free_irq(sport->rxirq, sport);
+ } else
+ free_irq(sport->port.irq, sport);
/*
* Disable all interrupts, port and break condition.
static struct uart_driver imx_reg;
static struct console imx_console = {
- .name = "ttySMX",
+ .name = DEV_NAME,
.write = imx_console_write,
.device = uart_console_device,
.setup = imx_console_setup,
static struct uart_driver imx_reg = {
.owner = THIS_MODULE,
.driver_name = DRIVER_NAME,
- .dev_name = "ttySMX",
+ .dev_name = DEV_NAME,
.major = SERIAL_IMX_MAJOR,
.minor = MINOR_START,
.nr = ARRAY_SIZE(imx_ports),
--- /dev/null
+/*
+ * Copyright (C) 2008 by Sascha Hauer <kernel@pengutronix.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+
+#ifndef ASMARM_ARCH_UART_H
+#define ASMARM_ARCH_UART_H
+
+#define IMXUART_HAVE_RTSCTS (1<<0)
+
+struct imxuart_platform_data {
+ int (*init)(struct platform_device *pdev);
+ int (*exit)(struct platform_device *pdev);
+ unsigned int flags;
+};
+
+int __init imx_init_uart(int uart_no, struct imxuart_platform_data *pdata);
+
+#endif
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