[PATCH v5 07/10] ARM: tty: mxs-auart: add initial Alphascale ASM9260 support
Oleksij Rempel
linux at rempel-privat.de
Tue Oct 14 01:03:35 PDT 2014
Alphascale ASM9260 uart IP has some common registers with
Freescale STMP37XX. This patch provide initial changes which
allow to reuse mxs-auart.c code for ASM9260.
Signed-off-by: Oleksij Rempel <linux at rempel-privat.de>
---
drivers/tty/serial/Kconfig | 5 +-
drivers/tty/serial/alphascale,asm9260_serial.h | 373 +++++++++++++++++++++++++
drivers/tty/serial/mxs-auart.c | 344 +++++++++++++++--------
3 files changed, 599 insertions(+), 123 deletions(-)
create mode 100644 drivers/tty/serial/alphascale,asm9260_serial.h
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 26cec64..11bbb76 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -1385,11 +1385,12 @@ config SERIAL_MSM_SMD
ports via tty device interface for MSM chipset.
config SERIAL_MXS_AUART
- depends on ARCH_MXS
+ depends on ARCH_MXS || MACH_ASM9260
tristate "MXS AUART support"
select SERIAL_CORE
help
- This driver supports the MXS Application UART (AUART) port.
+ This driver supports the MXS and Alphascale ASM9260 Application
+ UART (AUART) port.
config SERIAL_MXS_AUART_CONSOLE
bool "MXS AUART console support"
diff --git a/drivers/tty/serial/alphascale,asm9260_serial.h b/drivers/tty/serial/alphascale,asm9260_serial.h
new file mode 100644
index 0000000..eeed9c4
--- /dev/null
+++ b/drivers/tty/serial/alphascale,asm9260_serial.h
@@ -0,0 +1,373 @@
+/*
+ * Copyright (C) 2014 Oleksij Rempel <linux at rempel-privat.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _ALPHASCALE_ASM9260_SERIAL_H
+#define _ALPHASCALE_ASM9260_SERIAL_H
+
+/* RX ctrl register */
+#define ASM9260_HW_CTRL0 0x0000
+/* RW. Set to zero for normal operation. */
+#define ASM9260_BM_CTRL0_SFTRST BIT(31)
+/*
+ * RW. 0 for normal operation; 1 gates all of the block level clocks off for
+ * miniminizing AC energy consumption.
+ */
+#define ASM9260_BM_CTRL0_CLKGATE BIT(30)
+/*
+ * RW. Tell the UART to execute the RX DMA Command. The
+ * UART will clear this bit at the end of receive execution.
+ */
+#define ASM9260_BM_CTRL0_RXDMA_RUN BIT(28)
+/* RW. 0 use FIFO for status register; 1 use DMA */
+#define ASM9260_BM_CTRL0_RXTO_SOURCE_STATUS BIT(25)
+/*
+ * RW. RX TIMEOUT Enable. Valid for FIFO and DMA.
+ * Warning: If this bit is set to 0, the RX timeout will not affect receive DMA
+ * operation. If this bit is set to 1, a receive timeout will cause the receive
+ * DMA logic to terminate by filling the remaining DMA bytes with garbage data.
+ */
+#define ASM9260_BM_CTRL0_RXTO_ENABLE BIT(24)
+/*
+ * RW. Receive Timeout Counter Value: number of 8-bit-time to wait before
+ * asserting timeout on the RX input. If the RXFIFO is not empty and the RX
+ * input is idle, then the watchdog counter will decrement each bit-time. Note
+ * 7-bit-time is added to the programmed value, so a value of zero will set
+ * the counter to 7-bit-time, a value of 0x1 gives 15-bit-time and so on. Also
+ * note that the counter is reloaded at the end of each frame, so if the frame
+ * is 10 bits long and the timeout counter value is zero, then timeout will
+ * occur (when FIFO is not empty) even if the RX input is not idle. The default
+ * value is 0x3 (31 bit-time).
+ */
+#define ASM9260_BM_CTRL0_RXTO_MASK (0xff<<16)
+/* TIMEOUT = (100*7+1)*(1/BAUD) */
+#define ASM9260_BM_CTRL0_DEFAULT_RXTIMEOUT (20<<16)
+/* RW. Number of bytes to receive. This must be a multiple of 4 */
+#define ASM9260_BM_CTRL0_RXDMA_COUNT_MASK (0xffff<<0)
+
+/* TX ctrl register */
+#define ASM9260_HW_CTRL1 0x0010
+/*
+ * RW. Tell the UART to execute the TX DMA Command. The
+ * UART will clear this bit at the end of transmit execution.
+ */
+#define ASM9260_BM_CTRL1_TXDMA_RUN BIT(28)
+/* RW. Number of bytes to transmit. */
+#define ASM9260_BM_CTRL1_TXDMA_COUNT_MASK (0xffff << 0)
+
+#define ASM9260_HW_CTRL2 0x0020
+/*
+ * RW. Receive dma will terminate on error. (Cmd_end signal may not be asserted
+ * when this occurs.)
+ */
+#define ASM9260_BM_CTRL2_DMAONERROR BIT(26)
+/*
+ * RW. Transmit DMA Enable. Data Register can be loaded with up to 4 bytes per
+ * write. TXFIFO must be enabled in TXDMA mode.
+ */
+#define ASM9260_BM_CTRL2_TXDMAE BIT(25)
+/*
+ * RW. Receive DMA Enable. Data Register can be contain up to 4 bytes per read.
+ * RXFIFO must be enabled in RXDMA mode.
+ */
+#define ASM9260_BM_CTRL2_RXDMAE BIT(24)
+/*
+ * RW. Receive Interrupt FIFO Level Select.
+ * The trigger points for the receive interrupt are as follows:
+ * ONE_EIGHTHS = 0x0 Trigger on FIFO full to at least 2 of 16 entries.
+ * ONE_QUARTER = 0x1 Trigger on FIFO full to at least 4 of 16 entries.
+ * ONE_HALF = 0x2 Trigger on FIFO full to at least 8 of 16 entries.
+ * THREE_QUARTERS = 0x3 Trigger on FIFO full to at least 12 of 16 entries.
+ * SEVEN_EIGHTHS = 0x4 Trigger on FIFO full to at least 14 of 16 entries.
+ */
+#define ASM9260_BM_CTRL2_RXIFLSEL (7<<20)
+#define ASM9260_BM_CTRL2_DEFAULT_RXIFLSEL (3<<20)
+/* RW. Same as RXIFLSEL */
+#define ASM9260_BM_CTRL2_TXIFLSEL (7<<16)
+#define ASM9260_BM_CTRL2_DEFAULT_TXIFLSEL (2<<16)
+/* RW. CTS Enable */
+#define ASM9260_BM_CTRL2_CTSE BIT(15)
+/* RW. RTS Enable */
+#define ASM9260_BM_CTRL2_RTSE BIT(14)
+/*
+ * RW. Manually trigger RTS. Works only if ASM9260_BM_CTRL2_RTSE = 0.
+ * When this bit is 1, the output is 0.
+ */
+#define ASM9260_BM_CTRL2_RTS BIT(11)
+/* RW. Set DTR. When this bit is 1, the output is 0. */
+#define ASM9260_BM_CTRL2_DTR BIT(10)
+/* RW. RX Enable */
+#define ASM9260_BM_CTRL2_RXE BIT(9)
+/* RW. TX Enable */
+#define ASM9260_BM_CTRL2_TXE BIT(8)
+/* RW. Loop Back Enable */
+#define ASM9260_BM_CTRL2_LBE BIT(7)
+#define ASM9260_BM_CTRL2_PORT_ENABLE BIT(0)
+
+#define ASM9260_HW_LINECTRL 0x0030
+#define ASM9260_BM_LCTRL_BAUD_DIVINT (0xFFFF<<16)
+#define ASM9260_BM_LCTRL_BAUD_DIVFRA (0x3F<<8)
+/*
+ * RW. Stick Parity Select. When bits 1, 2, and 7 of this register are set, the
+ * parity bit is transmitted and checked as a 0. When bits 1 and 7 are set,
+ * and bit 2 is 0, the parity bit is transmitted and checked as a 1. When this
+ * bit is cleared stick parity is disabled.
+ */
+#define ASM9260_BM_LCTRL_SPS BIT(7)
+/* RW. Word length */
+#define ASM9260_BM_LCTRL_WLEN (3<<5)
+#define ASM9260_BM_LCTRL_CHRL_5 (0<<5)
+#define ASM9260_BM_LCTRL_CHRL_6 (1<<5)
+#define ASM9260_BM_LCTRL_CHRL_7 (2<<5)
+#define ASM9260_BM_LCTRL_CHRL_8 (3<<5)
+/*
+ * RW. Enable FIFOs. If this bit is set to 1, transmit and receive FIFO buffers
+ * are enabled (FIFO mode). When cleared to 0, the FIFOs are disabled (character
+ * mode); that is, the FIFOs become 1-byte-deep holding registers.
+ */
+#define ASM9260_BM_LCTRL_FEN BIT(4)
+/*
+ * RW. Two Stop Bits Select. If this bit is set to 1, two stop bits are
+ * transmitted at the end of the frame. The receive logic does not check for
+ * two stop bits being received.
+ */
+#define ASM9260_BM_LCTRL_STP2 BIT(3)
+#define ASM9260_BM_LCTRL_NBSTOP_1 (0<<3)
+#define ASM9260_BM_LCTRL_NBSTOP_2 (1<<3)
+/* RW. Even Parity Select. If disabled, then odd parity is performed. */
+#define ASM9260_BM_LCTRL_EPS BIT(2)
+/* Parity Enable. */
+#define ASM9260_BM_LCTRL_PEN BIT(1)
+#define ASM9260_BM_LCTRL_PAR_MARK ((3<<1) | (1<<7))
+#define ASM9260_BM_LCTRL_PAR_SPACE ((1<<1) | (1<<7))
+#define ASM9260_BM_LCTRL_PAR_ODD ((1<<1) | (0<<7))
+#define ASM9260_BM_LCTRL_PAR_EVEN ((3<<1) | (0<<7))
+#define ASM9260_BM_LCTRL_PAR_NONE (0<<1)
+/*
+ * RW. Send Break. If this bit is set to 1, a low-level is continually output on
+ * the UARTTXD output, after completing transmission of the current character.
+ * For the proper execution of the break command, the software must set this bit
+ * for at least two complete frames. For normal use, this bit must be cleared
+ * to 0.
+ */
+#define ASM9260_BM_LCTRL_BREAK BIT(0)
+
+/*
+ * Interrupt register.
+ * contains the interrupt enables and the interrupt status bits
+ */
+#define ASM9260_HW_INTR 0x0040
+/* Tx FIFO EMPTY Raw Interrupt enable */
+#define ASM9260_BM_INTR_TFEIEN BIT(27)
+/* Overrun Error Interrupt Enable. */
+#define ASM9260_BM_INTR_OEIEN BIT(26)
+/* Break Error Interrupt Enable. */
+#define ASM9260_BM_INTR_BEIEN BIT(25)
+/* Parity Error Interrupt Enable. */
+#define ASM9260_BM_INTR_PEIEN BIT(24)
+/* Framing Error Interrupt Enable. */
+#define ASM9260_BM_INTR_FEIEN BIT(23)
+/*
+ * RW. Receive Timeout Interrupt Enable.
+ * If not set and FIFO is enabled, then RX will be triggered only
+ * if FIFO is full.
+ */
+#define ASM9260_BM_INTR_RTIEN BIT(22)
+/* Transmit Interrupt Enable. */
+#define ASM9260_BM_INTR_TXIEN BIT(21)
+/* Receive Interrupt Enable. */
+#define ASM9260_BM_INTR_RXIEN BIT(20)
+/* nUARTDSR Modem Interrupt Enable. */
+#define ASM9260_BM_INTR_DSRMIEN BIT(19)
+/* nUARTDCD Modem Interrupt Enable. */
+#define ASM9260_BM_INTR_DCDMIEN BIT(18)
+/* nUARTCTS Modem Interrupt Enable. */
+#define ASM9260_BM_INTR_CTSMIEN BIT(17)
+/* nUARTRI Modem Interrupt Enable. */
+#define ASM9260_BM_INTR_RIMIEN BIT(16)
+/* Auto-Boud Timeout */
+#define ASM9260_BM_INTR_ABTO BIT(13)
+#define ASM9260_BM_INTR_ABEO BIT(12)
+/* Tx FIFO EMPTY Raw Interrupt state */
+#define ASM9260_BM_INTR_TFEIS BIT(11)
+/* Overrun Error */
+#define ASM9260_BM_INTR_OEIS BIT(10)
+/* Break Error */
+#define ASM9260_BM_INTR_BEIS BIT(9)
+/* Parity Error */
+#define ASM9260_BM_INTR_PEIS BIT(8)
+/* Framing Error */
+#define ASM9260_BM_INTR_FEIS BIT(7)
+/* Receive Timeout */
+#define ASM9260_BM_INTR_RTIS BIT(6)
+/* Transmit done */
+#define ASM9260_BM_INTR_TXIS BIT(5)
+/* Receive done */
+#define ASM9260_BM_INTR_RXIS BIT(4)
+#define ASM9260_BM_INTR_DSRMIS BIT(3)
+#define ASM9260_BM_INTR_DCDMIS BIT(2)
+#define ASM9260_BM_INTR_CTSMIS BIT(1)
+#define ASM9260_BM_INTR_RIMIS BIT(0)
+#define ASM9260_BM_INTR_DEF_MASK (ASM9260_BM_INTR_RXIEN \
+ | ASM9260_BM_INTR_TXIEN | ASM9260_BM_INTR_RTIEN \
+ | ASM9260_BM_INTR_FEIEN | ASM9260_BM_INTR_PEIEN \
+ | ASM9260_BM_INTR_BEIEN | ASM9260_BM_INTR_OEIEN)
+#define ASM9260_BM_INTR_DEF_IS_MASK (BM_INTR_DEF_MASK >> 16)
+#define ASM9260_BM_INTR_EN_MASK (0x3fff0000)
+#define ASM9260_BM_INTR_IS_MASK (0x00003fff)
+
+/*
+ * RW. In DMA mode, up to 4 Received/Transmit characters can be accessed at a
+ * time. In PIO mode, only one character can be accessed at a time. The status
+ * register contains the receive data flags and valid bits.
+ */
+#define ASM9260_HW_DATA 0x0050
+
+#define ASM9260_HW_STAT 0x0060
+/* RO. If 1, UARTAPP is present in this product. */
+#define ASM9260_BM_STAT_PRESENT BIT(31)
+/* RO. If 1, HISPEED is present in this product. */
+#define ASM9260_BM_STAT_HISPEED BIT(30)
+/* RO. UART Busy. */
+#define ASM9260_BM_STAT_BUSY BIT(29)
+/* RO. Clear To Send. */
+#define ASM9260_BM_STAT_CTS BIT(28)
+/* RO. Transmit FIFO/PIO Empty */
+#define ASM9260_BM_STAT_TXEMPTY BIT(27)
+/* RO. Receive FIFO Full. */
+#define ASM9260_BM_STAT_RXFULL BIT(26)
+/* RO. Transmit FIFO Full. */
+#define ASM9260_BM_STAT_TXFULL BIT(25)
+/* RO. Receive FIFO Empty. */
+#define ASM9260_BM_STAT_RXEMPTY BIT(24)
+/*
+ * RW. The invalid state of the last read of Receive Data. Each
+ * bit corresponds to one byte of the RX data. (1 = invalid.)
+ */
+#define ASM9260_BM_STAT_RXBYTE_INVALID_MASK (0xf<<20)
+/*
+ * RO. Overrun Error. This bit is set to 1 if data is received and the FIFO is
+ * already full. This bit is cleared to 0 by any write to the Status Register.
+ * The FIFO contents remain valid since no further data is written when the
+ * FIFO is full; only the contents of the shift register are overwritten. The
+ * CPU must now read the data in order to empty the FIFO.
+ */
+#define ASM9260_BM_STAT_OVERRUNERR BIT(19)
+/*
+ * RW. Break Error. For PIO mode, this is for the last character read from the
+ * data register. For DMA mode, it will be set to 1 if any received character
+ * for a particular RXDMA command had a Break Error. To clear this bit, write a
+ * zero to it. Note that clearing this bit does not affect the interrupt status,
+ * which must be cleared by writing the interrupt register.
+ */
+#define ASM9260_BM_STAT_BREAKERR BIT(18)
+/* RW. Parity Error. Same as BREAKERR. */
+#define ASM9260_BM_STAT_PARITYERR BIT(17)
+/* RW. Framing Erro. Same as BREAKERR. */
+#define ASM9260_BM_STAT_FRAMEERR BIT(16)
+/* RO. Number of bytes received during a Receive DMA command. */
+#define ASM9260_BM_STAT_RXCOUNT_MASK (0xffff<<0)
+
+/* RO. The UART Debug Register contains the state of the DMA signals. */
+#define ASM9260_HW_DEBUG 0x0070
+/* DMA Command Run Status */
+#define ASM9260_BM_DEBUG_TXDMARUN BIT(5)
+#define ASM9260_BM_DEBUG_RXDMARUN BIT(4)
+/* DMA Command End Status */
+#define ASM9260_BM_DEBUG_TXCMDEND BIT(3)
+#define ASM9260_BM_DEBUG_RXCMDEND BIT(2)
+/* DMA Request Status */
+#define ASM9260_BM_DEBUG_TXDMARQ BIT(1)
+#define ASM9260_BM_DEBUG_RXDMARQ BIT(0)
+
+#define ASM9260_HW_ILPR 0x0080
+
+#define ASM9260_HW_RS485CTRL 0x0090
+/*
+ * RW. This bit reverses the polarity of the direction control signal on the RTS
+ * (or DTR) pin.
+ * If 0, The direction control pin will be driven to logic ‘0’ when the
+ * transmitter has data to be sent. It will be driven to logic ‘1’ after the
+ * last bit of data has been transmitted.
+ */
+#define ASM9260_BM_RS485CTRL_ONIV BIT(5)
+/* RW. Enable Auto Direction Control. */
+#define ASM9260_BM_RS485CTRL_DIR_CTRL BIT(4)
+/*
+ * RW. If 0 and DIR_CTRL = 1, pin RTS is used for direction control.
+ * If 1 and DIR_CTRL = 1, pin DTR is used for direction control.
+ */
+#define ASM9260_BM_RS485CTRL_PINSEL BIT(3)
+/* RW. Enable Auto Address Detect (AAD). */
+#define ASM9260_BM_RS485CTRL_AADEN BIT(2)
+/* RW. Disable receiver. */
+#define ASM9260_BM_RS485CTRL_RXDIS BIT(1)
+/* RW. Enable RS-485/EIA-485 Normal Multidrop Mode (NMM) */
+#define ASM9260_BM_RS485CTRL_RS485EN BIT(0)
+
+#define ASM9260_HW_RS485ADRMATCH 0x00a0
+/* Contains the address match value. */
+#define ASM9260_BM_RS485ADRMATCH_MASK (0xff<<0)
+
+#define ASM9260_HW_RS485DLY 0x00b0
+/*
+ * RW. Contains the direction control (RTS or DTR) delay value. This delay time
+ * is in periods of the baud clock.
+ */
+#define ASM9260_BM_RS485DLY_MASK (0xff<<0)
+
+#define ASM9260_HW_AUTOBAUD 0x00c0
+/* WO. Auto-baud time-out interrupt clear bit. */
+#define ASM9260_BM_AUTOBAUD_ABTOIntClr BIT(9)
+/* WO. End of auto-baud interrupt clear bit. */
+#define ASM9260_BM_AUTOBAUD_ABEOIntClr BIT(8)
+/* Restart in case of timeout (counter restarts at next UART Rx falling edge) */
+#define ASM9260_BM_AUTOBAUD_AUTORESTART BIT(2)
+/* Auto-baud mode select bit. 0 - Mode 0, 1 - Mode 1. */
+#define ASM9260_BM_AUTOBAUD_MODE BIT(1)
+/*
+ * Auto-baud start (auto-baud is running). Auto-baud run bit. This bit is
+ * automatically cleared after auto-baud completion.
+ */
+#define ASM9260_BM_AUTOBAUD_START BIT(0)
+
+#define ASM9260_HW_CTRL3 0x00d0
+#define ASM9260_BM_CTRL3_OUTCLK_DIV_MASK (0xffff<<16)
+/*
+ * RW. Provide clk over OUTCLK pin. In case of asm9260 it can be configured on
+ * pins 137 and 144.
+ */
+#define ASM9260_BM_CTRL3_MASTERMODE BIT(6)
+/* RW. Baud Rate Mode: 1 - Enable sync mode. 0 - async mode. */
+#define ASM9260_BM_CTRL3_SYNCMODE BIT(4)
+/* RW. 1 - MSB bit send frist; 0 - LSB bit frist. */
+#define ASM9260_BM_CTRL3_MSBF BIT(2)
+/* RW. 1 - sample rate = 8 x Baudrate; 0 - sample rate = 16 x Baudrate. */
+#define ASM9260_BM_CTRL3_BAUD8 BIT(1)
+/* RW. 1 - Set word lenght to 9bit. 0 - use ASM9260_BM_LCTRL_WLEN */
+#define ASM9260_BM_CTRL3_9BIT BIT(0)
+
+#define ASM9260_HW_ISO7816_CTRL 0x00e0
+/* RW. Enable High Speed mode. */
+#define ASM9260_BM_ISO7816CTRL_HS BIT(12)
+/* Disable Successive Receive NACK */
+#define ASM9260_BM_ISO7816CTRL_DS_NACK BIT(8)
+#define ASM9260_BM_ISO7816CTRL_MAX_ITER_MASK (0xff<<4)
+/* Receive NACK Inhibit */
+#define ASM9260_BM_ISO7816CTRL_INACK BIT(3)
+#define ASM9260_BM_ISO7816CTRL_NEG_DATA BIT(2)
+/* RW. 1 - ISO7816 mode; 0 - USART mode */
+#define ASM9260_BM_ISO7816CTRL_ENABLE BIT(0)
+
+#define ASM9260_HW_ISO7816_ERRCNT 0x00f0
+/* Parity error counter. Will be cleared after reading */
+#define ASM9260_BM_ISO7816_NB_ERRORS_MASK (0xff<<0)
+
+#define ASM9260_HW_ISO7816_STATUS 0x0100
+/* Max number of Repetitions Reached */
+#define ASM9260_BM_ISO7816_STAT_ITERATION BIT(0)
+#endif
diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c
index b5c3292..b5a1455 100644
--- a/drivers/tty/serial/mxs-auart.c
+++ b/drivers/tty/serial/mxs-auart.c
@@ -1,17 +1,18 @@
/*
- * Freescale STMP37XX/STMP378X Application UART driver
+ * Application UART driver for:
+ * Freescale STMP37XX/STMP378X
+ * Alphascale ASM9260
*
* Author: dmitry pervushin <dimka at embeddedalley.com>
*
+ * Copyright 2014 Oleksij Rempel <linux at rempel-privat.de>
+ * Provide Alphascale ASM9260 support.
* Copyright 2008-2010 Freescale Semiconductor, Inc.
* Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved.
*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
- *
- * http://www.opensource.org/licenses/gpl-license.html
- * http://www.gnu.org/copyleft/gpl.html
*/
#include <linux/kernel.h>
@@ -37,34 +38,23 @@
#include <linux/dmaengine.h>
#include <asm/cacheflush.h>
+#include "alphascale,asm9260_serial.h"
#define MXS_AUART_PORTS 5
#define MXS_AUART_FIFO_SIZE 16
+#define MXS_DEVICENAME "ttyAPP"
+#define DRIVER_NAME "mxs-auart"
+
+#define SET_REG 0x4
+#define CLR_REG 0x8
+#define TOG_REG 0xc
#define AUART_CTRL0 0x00000000
-#define AUART_CTRL0_SET 0x00000004
-#define AUART_CTRL0_CLR 0x00000008
-#define AUART_CTRL0_TOG 0x0000000c
#define AUART_CTRL1 0x00000010
-#define AUART_CTRL1_SET 0x00000014
-#define AUART_CTRL1_CLR 0x00000018
-#define AUART_CTRL1_TOG 0x0000001c
#define AUART_CTRL2 0x00000020
-#define AUART_CTRL2_SET 0x00000024
-#define AUART_CTRL2_CLR 0x00000028
-#define AUART_CTRL2_TOG 0x0000002c
#define AUART_LINECTRL 0x00000030
-#define AUART_LINECTRL_SET 0x00000034
-#define AUART_LINECTRL_CLR 0x00000038
-#define AUART_LINECTRL_TOG 0x0000003c
#define AUART_LINECTRL2 0x00000040
-#define AUART_LINECTRL2_SET 0x00000044
-#define AUART_LINECTRL2_CLR 0x00000048
-#define AUART_LINECTRL2_TOG 0x0000004c
#define AUART_INTR 0x00000050
-#define AUART_INTR_SET 0x00000054
-#define AUART_INTR_CLR 0x00000058
-#define AUART_INTR_TOG 0x0000005c
#define AUART_DATA 0x00000060
#define AUART_STAT 0x00000070
#define AUART_DEBUG 0x00000080
@@ -129,6 +119,17 @@ static struct uart_driver auart_driver;
enum mxs_auart_type {
IMX23_AUART,
IMX28_AUART,
+ ASM9260_AUART,
+};
+
+struct mxs_auart_regs {
+ void __iomem *ctrl0;
+ void __iomem *ctrl1;
+ void __iomem *ctrl2;
+ void __iomem *linectrl;
+ void __iomem *intr;
+ void __iomem *data;
+ void __iomem *stat;
};
struct mxs_auart_port {
@@ -142,9 +143,11 @@ struct mxs_auart_port {
unsigned int ctrl;
enum mxs_auart_type devtype;
+ struct mxs_auart_regs regs;
unsigned int irq;
struct clk *clk;
+ struct clk *clk_ahb;
struct device *dev;
/* for DMA */
@@ -160,6 +163,7 @@ struct mxs_auart_port {
static struct platform_device_id mxs_auart_devtype[] = {
{ .name = "mxs-auart-imx23", .driver_data = IMX23_AUART },
{ .name = "mxs-auart-imx28", .driver_data = IMX28_AUART },
+ { .name = "as-auart-asm9260", .driver_data = ASM9260_AUART },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(platform, mxs_auart_devtype);
@@ -171,7 +175,11 @@ static struct of_device_id mxs_auart_dt_ids[] = {
}, {
.compatible = "fsl,imx23-auart",
.data = &mxs_auart_devtype[IMX23_AUART]
+ }, {
+ .compatible = "alphascale,asm9260-auart",
+ .data = &mxs_auart_devtype[ASM9260_AUART]
}, { /* sentinel */ }
+
};
MODULE_DEVICE_TABLE(of, mxs_auart_dt_ids);
@@ -180,6 +188,11 @@ static inline int is_imx28_auart(struct mxs_auart_port *s)
return s->devtype == IMX28_AUART;
}
+static inline int is_asm9260_auart(struct mxs_auart_port *s)
+{
+ return s->devtype == ASM9260_AUART;
+}
+
static inline bool auart_dma_enabled(struct mxs_auart_port *s)
{
return s->flags & MXS_AUART_DMA_ENABLED;
@@ -281,19 +294,19 @@ static void mxs_auart_tx_chars(struct mxs_auart_port *s)
}
- while (!(readl(s->port.membase + AUART_STAT) &
+ while (!(readl(s->regs.stat) &
AUART_STAT_TXFF)) {
if (s->port.x_char) {
s->port.icount.tx++;
writel(s->port.x_char,
- s->port.membase + AUART_DATA);
+ s->regs.data);
s->port.x_char = 0;
continue;
}
if (!uart_circ_empty(xmit) && !uart_tx_stopped(&s->port)) {
s->port.icount.tx++;
writel(xmit->buf[xmit->tail],
- s->port.membase + AUART_DATA);
+ s->regs.data);
xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
} else
break;
@@ -303,10 +316,10 @@ static void mxs_auart_tx_chars(struct mxs_auart_port *s)
if (uart_circ_empty(&(s->port.state->xmit)))
writel(AUART_INTR_TXIEN,
- s->port.membase + AUART_INTR_CLR);
+ s->regs.intr + CLR_REG);
else
writel(AUART_INTR_TXIEN,
- s->port.membase + AUART_INTR_SET);
+ s->regs.intr + SET_REG);
if (uart_tx_stopped(&s->port))
mxs_auart_stop_tx(&s->port);
@@ -318,8 +331,8 @@ static void mxs_auart_rx_char(struct mxs_auart_port *s)
u32 stat;
u8 c;
- c = readl(s->port.membase + AUART_DATA);
- stat = readl(s->port.membase + AUART_STAT);
+ c = readl(s->regs.data);
+ stat = readl(s->regs.stat);
flag = TTY_NORMAL;
s->port.icount.rx++;
@@ -354,7 +367,7 @@ static void mxs_auart_rx_char(struct mxs_auart_port *s)
uart_insert_char(&s->port, stat, AUART_STAT_OERR, c, flag);
out:
- writel(stat, s->port.membase + AUART_STAT);
+ writel(stat, s->regs.stat);
}
static void mxs_auart_rx_chars(struct mxs_auart_port *s)
@@ -362,13 +375,13 @@ static void mxs_auart_rx_chars(struct mxs_auart_port *s)
u32 stat = 0;
for (;;) {
- stat = readl(s->port.membase + AUART_STAT);
+ stat = readl(s->regs.stat);
if (stat & AUART_STAT_RXFE)
break;
mxs_auart_rx_char(s);
}
- writel(stat, s->port.membase + AUART_STAT);
+ writel(stat, s->regs.stat);
tty_flip_buffer_push(&s->port.state->port);
}
@@ -404,7 +417,7 @@ static void mxs_auart_set_mctrl(struct uart_port *u, unsigned mctrl)
{
struct mxs_auart_port *s = to_auart_port(u);
- u32 ctrl = readl(u->membase + AUART_CTRL2);
+ u32 ctrl = readl(s->regs.ctrl2);
ctrl &= ~(AUART_CTRL2_RTSEN | AUART_CTRL2_RTS);
if (mctrl & TIOCM_RTS) {
@@ -415,14 +428,14 @@ static void mxs_auart_set_mctrl(struct uart_port *u, unsigned mctrl)
}
s->ctrl = mctrl;
- writel(ctrl, u->membase + AUART_CTRL2);
+ writel(ctrl, s->regs.ctrl2);
}
static u32 mxs_auart_get_mctrl(struct uart_port *u)
{
struct mxs_auart_port *s = to_auart_port(u);
- u32 stat = readl(u->membase + AUART_STAT);
- int ctrl2 = readl(u->membase + AUART_CTRL2);
+ u32 stat = readl(s->regs.stat);
+ int ctrl2 = readl(s->regs.ctrl2);
u32 mctrl = s->ctrl;
mctrl &= ~TIOCM_CTS;
@@ -445,14 +458,14 @@ static void dma_rx_callback(void *arg)
dma_unmap_sg(s->dev, &s->rx_sgl, 1, DMA_FROM_DEVICE);
- stat = readl(s->port.membase + AUART_STAT);
+ stat = readl(s->regs.stat);
stat &= ~(AUART_STAT_OERR | AUART_STAT_BERR |
AUART_STAT_PERR | AUART_STAT_FERR);
count = stat & AUART_STAT_RXCOUNT_MASK;
tty_insert_flip_string(port, s->rx_dma_buf, count);
- writel(stat, s->port.membase + AUART_STAT);
+ writel(stat, s->regs.stat);
tty_flip_buffer_push(port);
/* start the next DMA for RX. */
@@ -506,8 +519,8 @@ static void mxs_auart_dma_exit_channel(struct mxs_auart_port *s)
s->rx_dma_chan = NULL;
}
- kfree(s->tx_dma_buf);
- kfree(s->rx_dma_buf);
+ devm_kfree(s->dev, s->tx_dma_buf);
+ devm_kfree(s->dev, s->rx_dma_buf);
s->tx_dma_buf = NULL;
s->rx_dma_buf = NULL;
}
@@ -516,7 +529,7 @@ static void mxs_auart_dma_exit(struct mxs_auart_port *s)
{
writel(AUART_CTRL2_TXDMAE | AUART_CTRL2_RXDMAE | AUART_CTRL2_DMAONERR,
- s->port.membase + AUART_CTRL2_CLR);
+ s->regs.ctrl2 + CLR_REG);
mxs_auart_dma_exit_channel(s);
s->flags &= ~MXS_AUART_DMA_ENABLED;
@@ -533,7 +546,8 @@ static int mxs_auart_dma_init(struct mxs_auart_port *s)
s->rx_dma_chan = dma_request_slave_channel(s->dev, "rx");
if (!s->rx_dma_chan)
goto err_out;
- s->rx_dma_buf = kzalloc(UART_XMIT_SIZE, GFP_KERNEL | GFP_DMA);
+ s->rx_dma_buf = devm_kzalloc(s->dev,
+ UART_XMIT_SIZE, GFP_KERNEL | GFP_DMA);
if (!s->rx_dma_buf)
goto err_out;
@@ -541,7 +555,8 @@ static int mxs_auart_dma_init(struct mxs_auart_port *s)
s->tx_dma_chan = dma_request_slave_channel(s->dev, "tx");
if (!s->tx_dma_chan)
goto err_out;
- s->tx_dma_buf = kzalloc(UART_XMIT_SIZE, GFP_KERNEL | GFP_DMA);
+ s->tx_dma_buf = devm_kzalloc(s->dev,
+ UART_XMIT_SIZE, GFP_KERNEL | GFP_DMA);
if (!s->tx_dma_buf)
goto err_out;
@@ -571,7 +586,7 @@ static void mxs_auart_settermios(struct uart_port *u,
cflag = termios->c_cflag;
ctrl = AUART_LINECTRL_FEN;
- ctrl2 = readl(u->membase + AUART_CTRL2);
+ ctrl2 = readl(s->regs.ctrl2);
/* byte size */
switch (cflag & CSIZE) {
@@ -656,13 +671,21 @@ static void mxs_auart_settermios(struct uart_port *u,
}
/* set baud rate */
- baud = uart_get_baud_rate(u, termios, old, 0, u->uartclk);
- div = u->uartclk * 32 / baud;
+ if (is_asm9260_auart(s)) {
+ baud = uart_get_baud_rate(u, termios, old,
+ u->uartclk * 4 / 0x3FFFFF,
+ u->uartclk / 16);
+ div = u->uartclk * 4 / baud;
+ } else {
+ baud = uart_get_baud_rate(u, termios, old, 0, u->uartclk);
+ div = u->uartclk * 32 / baud;
+ }
+
ctrl |= AUART_LINECTRL_BAUD_DIVFRAC(div & 0x3F);
ctrl |= AUART_LINECTRL_BAUD_DIVINT(div >> 6);
+ writel(ctrl, s->regs.linectrl);
- writel(ctrl, u->membase + AUART_LINECTRL);
- writel(ctrl2, u->membase + AUART_CTRL2);
+ writel(ctrl2, s->regs.ctrl2);
uart_update_timeout(u, termios->c_cflag, baud);
@@ -672,7 +695,7 @@ static void mxs_auart_settermios(struct uart_port *u,
if (!mxs_auart_dma_prep_rx(s)) {
/* Disable the normal RX interrupt. */
writel(AUART_INTR_RXIEN | AUART_INTR_RTIEN,
- u->membase + AUART_INTR_CLR);
+ s->regs.intr + CLR_REG);
} else {
mxs_auart_dma_exit(s);
dev_err(s->dev, "We can not start up the DMA.\n");
@@ -684,21 +707,21 @@ static irqreturn_t mxs_auart_irq_handle(int irq, void *context)
{
u32 istat;
struct mxs_auart_port *s = context;
- u32 stat = readl(s->port.membase + AUART_STAT);
+ u32 stat = readl(s->regs.stat);
- istat = readl(s->port.membase + AUART_INTR);
+ istat = readl(s->regs.intr);
/* ack irq */
writel(istat & (AUART_INTR_RTIS
| AUART_INTR_TXIS
| AUART_INTR_RXIS
| AUART_INTR_CTSMIS),
- s->port.membase + AUART_INTR_CLR);
+ s->regs.intr + CLR_REG);
if (istat & AUART_INTR_CTSMIS) {
uart_handle_cts_change(&s->port, stat & AUART_STAT_CTS);
writel(AUART_INTR_CTSMIS,
- s->port.membase + AUART_INTR_CLR);
+ s->regs.intr + CLR_REG);
istat &= ~AUART_INTR_CTSMIS;
}
@@ -716,20 +739,20 @@ static irqreturn_t mxs_auart_irq_handle(int irq, void *context)
return IRQ_HANDLED;
}
-static void mxs_auart_reset(struct uart_port *u)
+static void mxs_auart_reset(struct mxs_auart_port *s)
{
int i;
unsigned int reg;
- writel(AUART_CTRL0_SFTRST, u->membase + AUART_CTRL0_CLR);
+ writel(AUART_CTRL0_SFTRST, s->regs.ctrl0 + CLR_REG);
for (i = 0; i < 10000; i++) {
- reg = readl(u->membase + AUART_CTRL0);
+ reg = readl(s->regs.ctrl0);
if (!(reg & AUART_CTRL0_SFTRST))
break;
udelay(3);
}
- writel(AUART_CTRL0_CLKGATE, u->membase + AUART_CTRL0_CLR);
+ writel(AUART_CTRL0_CLKGATE, s->regs.ctrl0 + CLR_REG);
}
static int mxs_auart_startup(struct uart_port *u)
@@ -741,12 +764,12 @@ static int mxs_auart_startup(struct uart_port *u)
if (ret)
return ret;
- writel(AUART_CTRL0_CLKGATE, u->membase + AUART_CTRL0_CLR);
+ writel(AUART_CTRL0_CLKGATE, s->regs.ctrl0 + CLR_REG);
- writel(AUART_CTRL2_UARTEN, u->membase + AUART_CTRL2_SET);
+ writel(AUART_CTRL2_UARTEN, s->regs.ctrl2 + SET_REG);
writel(AUART_INTR_RXIEN | AUART_INTR_RTIEN | AUART_INTR_CTSMIEN,
- u->membase + AUART_INTR);
+ s->regs.intr);
/* Reset FIFO size (it could have changed if DMA was enabled) */
u->fifosize = MXS_AUART_FIFO_SIZE;
@@ -755,7 +778,7 @@ static int mxs_auart_startup(struct uart_port *u)
* Enable fifo so all four bytes of a DMA word are written to
* output (otherwise, only the LSB is written, ie. 1 in 4 bytes)
*/
- writel(AUART_LINECTRL_FEN, u->membase + AUART_LINECTRL_SET);
+ writel(AUART_LINECTRL_FEN, s->regs.linectrl + SET_REG);
return 0;
}
@@ -767,19 +790,21 @@ static void mxs_auart_shutdown(struct uart_port *u)
if (auart_dma_enabled(s))
mxs_auart_dma_exit(s);
- writel(AUART_CTRL2_UARTEN, u->membase + AUART_CTRL2_CLR);
+ writel(AUART_CTRL2_UARTEN, s->regs.ctrl2 + CLR_REG);
writel(AUART_INTR_RXIEN | AUART_INTR_RTIEN | AUART_INTR_CTSMIEN,
- u->membase + AUART_INTR_CLR);
+ s->regs.intr + CLR_REG);
- writel(AUART_CTRL0_CLKGATE, u->membase + AUART_CTRL0_SET);
+ writel(AUART_CTRL0_CLKGATE, s->regs.ctrl0 + SET_REG);
clk_disable_unprepare(s->clk);
}
static unsigned int mxs_auart_tx_empty(struct uart_port *u)
{
- if (readl(u->membase + AUART_STAT) & AUART_STAT_TXFE)
+ struct mxs_auart_port *s = to_auart_port(u);
+
+ if (readl(s->regs.stat) & AUART_STAT_TXFE)
return TIOCSER_TEMT;
else
return 0;
@@ -790,29 +815,35 @@ static void mxs_auart_start_tx(struct uart_port *u)
struct mxs_auart_port *s = to_auart_port(u);
/* enable transmitter */
- writel(AUART_CTRL2_TXE, u->membase + AUART_CTRL2_SET);
+ writel(AUART_CTRL2_TXE, s->regs.ctrl2 + SET_REG);
mxs_auart_tx_chars(s);
}
static void mxs_auart_stop_tx(struct uart_port *u)
{
- writel(AUART_CTRL2_TXE, u->membase + AUART_CTRL2_CLR);
+ struct mxs_auart_port *s = to_auart_port(u);
+
+ writel(AUART_CTRL2_TXE, s->regs.ctrl2 + CLR_REG);
}
static void mxs_auart_stop_rx(struct uart_port *u)
{
- writel(AUART_CTRL2_RXE, u->membase + AUART_CTRL2_CLR);
+ struct mxs_auart_port *s = to_auart_port(u);
+
+ writel(AUART_CTRL2_RXE, s->regs.ctrl2 + CLR_REG);
}
static void mxs_auart_break_ctl(struct uart_port *u, int ctl)
{
+ struct mxs_auart_port *s = to_auart_port(u);
+
if (ctl)
writel(AUART_LINECTRL_BRK,
- u->membase + AUART_LINECTRL_SET);
+ s->regs.linectrl + SET_REG);
else
writel(AUART_LINECTRL_BRK,
- u->membase + AUART_LINECTRL_CLR);
+ s->regs.linectrl + CLR_REG);
}
static struct uart_ops mxs_auart_ops = {
@@ -838,15 +869,16 @@ static struct mxs_auart_port *auart_port[MXS_AUART_PORTS];
#ifdef CONFIG_SERIAL_MXS_AUART_CONSOLE
static void mxs_auart_console_putchar(struct uart_port *port, int ch)
{
+ struct mxs_auart_port *s = to_auart_port(port);
unsigned int to = 1000;
- while (readl(port->membase + AUART_STAT) & AUART_STAT_TXFF) {
+ while (readl(s->regs.stat) & AUART_STAT_TXFF) {
if (!to--)
break;
udelay(1);
}
- writel(ch, port->membase + AUART_DATA);
+ writel(ch, s->regs.data);
}
static void
@@ -866,18 +898,18 @@ auart_console_write(struct console *co, const char *str, unsigned int count)
clk_enable(s->clk);
/* First save the CR then disable the interrupts */
- old_ctrl2 = readl(port->membase + AUART_CTRL2);
- old_ctrl0 = readl(port->membase + AUART_CTRL0);
+ old_ctrl2 = readl(s->regs.ctrl2);
+ old_ctrl0 = readl(s->regs.ctrl0);
writel(AUART_CTRL0_CLKGATE,
- port->membase + AUART_CTRL0_CLR);
+ s->regs.ctrl0 + CLR_REG);
writel(AUART_CTRL2_UARTEN | AUART_CTRL2_TXE,
- port->membase + AUART_CTRL2_SET);
+ s->regs.ctrl2 + SET_REG);
uart_console_write(port, str, count, mxs_auart_console_putchar);
/* Finally, wait for transmitter to become empty ... */
- while (readl(port->membase + AUART_STAT) & AUART_STAT_BUSY) {
+ while (readl(s->regs.stat) & AUART_STAT_BUSY) {
udelay(1);
if (!to--)
break;
@@ -889,24 +921,25 @@ auart_console_write(struct console *co, const char *str, unsigned int count)
* unused, but that is better than to disable it while it is still
* transmitting.
*/
- if (!(readl(port->membase + AUART_STAT) & AUART_STAT_BUSY)) {
- writel(old_ctrl0, port->membase + AUART_CTRL0);
- writel(old_ctrl2, port->membase + AUART_CTRL2);
+ if (!(readl(s->regs.stat) & AUART_STAT_BUSY)) {
+ writel(old_ctrl0, s->regs.ctrl0);
+ writel(old_ctrl2, s->regs.ctrl2);
}
clk_disable(s->clk);
}
static void __init
-auart_console_get_options(struct uart_port *port, int *baud,
+auart_console_get_options(struct mxs_auart_port *s, int *baud,
int *parity, int *bits)
{
+ struct uart_port *port = &s->port;
unsigned int lcr_h, quot;
- if (!(readl(port->membase + AUART_CTRL2) & AUART_CTRL2_UARTEN))
+ if (!(readl(s->regs.ctrl2) & AUART_CTRL2_UARTEN))
return;
- lcr_h = readl(port->membase + AUART_LINECTRL);
+ lcr_h = readl(s->regs.linectrl);
*parity = 'n';
if (lcr_h & AUART_LINECTRL_PEN) {
@@ -921,10 +954,10 @@ auart_console_get_options(struct uart_port *port, int *baud,
else
*bits = 8;
- quot = ((readl(port->membase + AUART_LINECTRL)
+ quot = ((readl(s->regs.linectrl)
& AUART_LINECTRL_BAUD_DIVINT_MASK))
>> (AUART_LINECTRL_BAUD_DIVINT_SHIFT - 6);
- quot |= ((readl(port->membase + AUART_LINECTRL)
+ quot |= ((readl(s->regs.linectrl)
& AUART_LINECTRL_BAUD_DIVFRAC_MASK))
>> AUART_LINECTRL_BAUD_DIVFRAC_SHIFT;
if (quot == 0)
@@ -950,6 +983,7 @@ auart_console_setup(struct console *co, char *options)
*/
if (co->index == -1 || co->index >= ARRAY_SIZE(auart_port))
co->index = 0;
+
s = auart_port[co->index];
if (!s)
return -ENODEV;
@@ -961,7 +995,7 @@ auart_console_setup(struct console *co, char *options)
if (options)
uart_parse_options(options, &baud, &parity, &bits, &flow);
else
- auart_console_get_options(&s->port, &baud, &parity, &bits);
+ auart_console_get_options(s, &baud, &parity, &bits);
ret = uart_set_options(&s->port, co, baud, parity, bits, flow);
@@ -971,7 +1005,7 @@ auart_console_setup(struct console *co, char *options)
}
static struct console auart_console = {
- .name = "ttyAPP",
+ .name = MXS_DEVICENAME,
.write = auart_console_write,
.device = uart_console_device,
.setup = auart_console_setup,
@@ -983,8 +1017,8 @@ static struct console auart_console = {
static struct uart_driver auart_driver = {
.owner = THIS_MODULE,
- .driver_name = "ttyAPP",
- .dev_name = "ttyAPP",
+ .driver_name = MXS_DEVICENAME,
+ .dev_name = MXS_DEVICENAME,
.major = 0,
.minor = 0,
.nr = MXS_AUART_PORTS,
@@ -993,6 +1027,58 @@ static struct uart_driver auart_driver = {
#endif
};
+static void mxs_init_regs(struct mxs_auart_port *s)
+{
+ s->regs.ctrl0 = s->port.membase + AUART_CTRL0;
+ s->regs.ctrl1 = s->port.membase + AUART_CTRL1;
+ s->regs.ctrl2 = s->port.membase + AUART_CTRL2;
+ s->regs.linectrl = s->port.membase + AUART_LINECTRL;
+
+ if (is_asm9260_auart(s)) {
+ s->regs.intr = s->port.membase + ASM9260_HW_INTR;
+ s->regs.data = s->port.membase + ASM9260_HW_DATA;
+ s->regs.stat = s->port.membase + ASM9260_HW_STAT;
+ } else {
+ s->regs.intr = s->port.membase + AUART_INTR;
+ s->regs.data = s->port.membase + AUART_DATA;
+ s->regs.stat = s->port.membase + AUART_STAT;
+ }
+}
+
+static int mxs_get_dt_clks(struct mxs_auart_port *s,
+ struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ int clk_idx = 0, err;
+
+ s->clk = of_clk_get(np, clk_idx);
+ if (IS_ERR(s->clk))
+ goto out_err;
+
+ /* configure AHB clock */
+ clk_idx = 1;
+ s->clk_ahb = of_clk_get(np, clk_idx);
+ if (IS_ERR(s->clk_ahb))
+ goto out_err;
+
+ err = clk_prepare_enable(s->clk_ahb);
+ if (err)
+ dev_err(s->dev, "Failed to enable ahb_clk!\n");
+
+ err = clk_set_rate(s->clk, clk_get_rate(s->clk_ahb));
+ if (err)
+ dev_err(s->dev, "Failed to set rate!\n");
+
+ err = clk_prepare_enable(s->clk);
+ if (err)
+ dev_err(s->dev, "Failed to enable clk!\n");
+
+ return 0;
+out_err:
+ dev_err(s->dev, "%s: Failed to get clk (%i)\n", __func__, clk_idx);
+ return 1;
+}
+
/*
* This function returns 1 if pdev isn't a device instatiated by dt, 0 if it
* could successfully get all information from dt or a negative errno.
@@ -1029,77 +1115,98 @@ static int mxs_auart_probe(struct platform_device *pdev)
int ret = 0;
struct resource *r;
- s = kzalloc(sizeof(struct mxs_auart_port), GFP_KERNEL);
+ s = devm_kzalloc(&pdev->dev,
+ sizeof(struct mxs_auart_port), GFP_KERNEL);
if (!s) {
ret = -ENOMEM;
goto out;
}
+ s->port.dev = s->dev = &pdev->dev;
+
ret = serial_mxs_probe_dt(s, pdev);
if (ret > 0)
s->port.line = pdev->id < 0 ? 0 : pdev->id;
else if (ret < 0)
- goto out_free;
+ return ret;
if (of_id) {
pdev->id_entry = of_id->data;
s->devtype = pdev->id_entry->driver_data;
}
- s->clk = clk_get(&pdev->dev, NULL);
- if (IS_ERR(s->clk)) {
- ret = PTR_ERR(s->clk);
- goto out_free;
+ if (is_asm9260_auart(s)) {
+ if (mxs_get_dt_clks(s, pdev))
+ return -ENODEV;
+ } else {
+ s->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(s->clk))
+ return PTR_ERR(s->clk);
}
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!r) {
- ret = -ENXIO;
- goto out_free_clk;
+ dev_err(s->dev, "platform_get_resource filed!\n");
+ return -ENXIO;
+ }
+
+ if (!devm_request_mem_region(s->dev, r->start, resource_size(r),
+ dev_name(s->dev))) {
+ dev_err(s->dev, "request_mem_region filed!\n");
+ return -ENXIO;
+ }
+
+ s->port.membase = devm_ioremap_nocache(s->dev, r->start,
+ resource_size(r));
+ if (!s->port.membase) {
+ dev_err(s->dev, "ioremap filed!\n");
+ return -ENXIO;
}
s->port.mapbase = r->start;
- s->port.membase = ioremap(r->start, resource_size(r));
s->port.ops = &mxs_auart_ops;
s->port.iotype = UPIO_MEM;
s->port.fifosize = MXS_AUART_FIFO_SIZE;
s->port.uartclk = clk_get_rate(s->clk);
s->port.type = PORT_IMX;
- s->port.dev = s->dev = &pdev->dev;
+
+ mxs_init_regs(s);
s->ctrl = 0;
s->irq = platform_get_irq(pdev, 0);
s->port.irq = s->irq;
- ret = request_irq(s->irq, mxs_auart_irq_handle, 0, dev_name(&pdev->dev), s);
+ ret = devm_request_threaded_irq(s->dev, s->irq, NULL,
+ mxs_auart_irq_handle, IRQF_ONESHOT,
+ dev_name(&pdev->dev), s);
if (ret)
- goto out_free_clk;
+ return ret;
platform_set_drvdata(pdev, s);
auart_port[s->port.line] = s;
- mxs_auart_reset(&s->port);
+ mxs_auart_reset(s);
ret = uart_add_one_port(&auart_driver, &s->port);
if (ret)
- goto out_free_irq;
+ goto out;
+
- version = readl(s->port.membase + AUART_VERSION);
- dev_info(&pdev->dev, "Found APPUART %d.%d.%d\n",
- (version >> 24) & 0xff,
- (version >> 16) & 0xff, version & 0xffff);
+ /* ASM9260 don't have version reg */
+ if (is_asm9260_auart(s))
+ dev_info(&pdev->dev, "Found APPUART ASM9260\n");
+ else {
+ version = readl(s->port.membase + AUART_VERSION);
+ dev_info(&pdev->dev, "Found APPUART %d.%d.%d\n",
+ (version >> 24) & 0xff,
+ (version >> 16) & 0xff, version & 0xffff);
+ }
return 0;
-out_free_irq:
- auart_port[pdev->id] = NULL;
- free_irq(s->irq, s);
-out_free_clk:
- clk_put(s->clk);
-out_free:
- kfree(s);
out:
+ auart_port[pdev->id] = NULL;
return ret;
}
@@ -1110,11 +1217,6 @@ static int mxs_auart_remove(struct platform_device *pdev)
uart_remove_one_port(&auart_driver, &s->port);
auart_port[pdev->id] = NULL;
-
- clk_put(s->clk);
- free_irq(s->irq, s);
- kfree(s);
-
return 0;
}
@@ -1122,7 +1224,7 @@ static struct platform_driver mxs_auart_driver = {
.probe = mxs_auart_probe,
.remove = mxs_auart_remove,
.driver = {
- .name = "mxs-auart",
+ .name = DRIVER_NAME,
.owner = THIS_MODULE,
.of_match_table = mxs_auart_dt_ids,
},
@@ -1157,4 +1259,4 @@ module_init(mxs_auart_init);
module_exit(mxs_auart_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Freescale MXS application uart driver");
-MODULE_ALIAS("platform:mxs-auart");
+MODULE_ALIAS("platform:" DRIVER_NAME);
--
1.9.1
More information about the linux-arm-kernel
mailing list