From patchwork Tue Oct 21 07:14:29 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Oleksij Rempel X-Patchwork-Id: 5110911 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id CE5679F349 for ; Tue, 21 Oct 2014 07:19:38 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 31D6F20149 for ; Tue, 21 Oct 2014 07:19:36 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 45DF620148 for ; Tue, 21 Oct 2014 07:19:33 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1XgTgn-0002Ws-G5; Tue, 21 Oct 2014 07:17:05 +0000 Received: from mout.gmx.net ([212.227.15.18]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1XgTfU-00016B-Qc for linux-arm-kernel@lists.infradead.org; Tue, 21 Oct 2014 07:15:48 +0000 Received: from zwerg.lan ([79.222.204.42]) by mail.gmx.com (mrgmx002) with ESMTPSA (Nemesis) id 0M0Ppl-1XzeyE3AVx-00uYEl; Tue, 21 Oct 2014 09:15:00 +0200 From: Oleksij Rempel To: linux-arm-kernel@lists.infradead.org, tglx@linutronix.de, mturquette@linaro.org, jason@lakedaemon.net, mark.rutland@arm.com, robherring2@gmail.com, daniel.lezcano@linaro.org Subject: [PATCH v7 07/10] ARM: tty: mxs-auart: add initial Alphascale ASM9260 support Date: Tue, 21 Oct 2014 09:14:29 +0200 Message-Id: <1413875672-7894-8-git-send-email-linux@rempel-privat.de> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1413875672-7894-1-git-send-email-linux@rempel-privat.de> References: <1413875672-7894-1-git-send-email-linux@rempel-privat.de> MIME-Version: 1.0 X-Provags-ID: V03:K0:n5GtW73DybEU0FBYXGowkpdozmsvPVaGxQHXNk63VPPpsCAXza/ Pt51fZ6NPSL3lDG1It0ttjzLdBoeK1lAEieqkWb5Q0LcHUPuI/gq2k00m39uTcrruWGIfv6 lG1LJ06d7hqR4IU6ZvnyCPS45yPjlRpp0P676sL+MooNsQ8dbt+JliwkPfEp1Qsz9/pcTO6 7P032uyrUKVBxeV5NGljg== X-UI-Out-Filterresults: notjunk:1; X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20141021_001545_473480_A621811E X-CRM114-Status: GOOD ( 25.49 ) X-Spam-Score: -0.3 (/) Cc: Oleksij Rempel X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-3.3 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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 --- 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 + * + * 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 * + * Copyright 2014 Oleksij Rempel + * 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 @@ -37,34 +38,23 @@ #include #include +#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);