From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 81EB8C04EBF for ; Mon, 23 Sep 2019 11:46:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 62595207FD for ; Mon, 23 Sep 2019 11:46:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2501892AbfIWLqz (ORCPT ); Mon, 23 Sep 2019 07:46:55 -0400 Received: from mx2.suse.de ([195.135.220.15]:54780 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1729982AbfIWLqx (ORCPT ); Mon, 23 Sep 2019 07:46:53 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 51009B152; Mon, 23 Sep 2019 11:46:51 +0000 (UTC) From: Thomas Bogendoerfer To: Jonathan Corbet , Ralf Baechle , Paul Burton , James Hogan , Lee Jones , "David S. Miller" , Srinivas Kandagatla , Alessandro Zummo , Alexandre Belloni , Greg Kroah-Hartman , Jiri Slaby , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, netdev@vger.kernel.org, linux-rtc@vger.kernel.org, linux-serial@vger.kernel.org Subject: [PATCH v6 4/4] MIPS: SGI-IP27: fix readb/writeb addressing Date: Mon, 23 Sep 2019 13:46:34 +0200 Message-Id: <20190923114636.6748-5-tbogendoerfer@suse.de> X-Mailer: git-send-email 2.13.7 In-Reply-To: <20190923114636.6748-1-tbogendoerfer@suse.de> References: <20190923114636.6748-1-tbogendoerfer@suse.de> Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Our chosen byte swapping, which is what firmware already uses, is to do readl/writel by normal lw/sw intructions (data invariance). This also means we need to mangle addresses for u8 and u16 accesses. The mangling for 16bit has been done aready, but 8bit one was missing. Correcting this causes different addresses for accesses to the SuperIO and local bus of the IOC3 chip. This is fixed by changing byte order in ioc3 and m48rtc_rtc structs. Acked-by: Alexandre Belloni Signed-off-by: Thomas Bogendoerfer --- arch/mips/include/asm/mach-ip27/mangle-port.h | 4 +-- arch/mips/include/asm/sn/ioc3.h | 38 +++++++++++++-------------- drivers/rtc/rtc-m48t35.c | 11 ++++++++ drivers/tty/serial/8250/8250_ioc3.c | 4 +-- 4 files changed, 34 insertions(+), 23 deletions(-) diff --git a/arch/mips/include/asm/mach-ip27/mangle-port.h b/arch/mips/include/asm/mach-ip27/mangle-port.h index f6e4912ea062..27c56efa519f 100644 --- a/arch/mips/include/asm/mach-ip27/mangle-port.h +++ b/arch/mips/include/asm/mach-ip27/mangle-port.h @@ -8,7 +8,7 @@ #ifndef __ASM_MACH_IP27_MANGLE_PORT_H #define __ASM_MACH_IP27_MANGLE_PORT_H -#define __swizzle_addr_b(port) (port) +#define __swizzle_addr_b(port) ((port) ^ 3) #define __swizzle_addr_w(port) ((port) ^ 2) #define __swizzle_addr_l(port) (port) #define __swizzle_addr_q(port) (port) @@ -20,6 +20,6 @@ # define ioswabl(a, x) (x) # define __mem_ioswabl(a, x) cpu_to_le32(x) # define ioswabq(a, x) (x) -# define __mem_ioswabq(a, x) cpu_to_le32(x) +# define __mem_ioswabq(a, x) cpu_to_le64(x) #endif /* __ASM_MACH_IP27_MANGLE_PORT_H */ diff --git a/arch/mips/include/asm/sn/ioc3.h b/arch/mips/include/asm/sn/ioc3.h index 78ef760ddde4..3865d3225780 100644 --- a/arch/mips/include/asm/sn/ioc3.h +++ b/arch/mips/include/asm/sn/ioc3.h @@ -21,50 +21,50 @@ struct ioc3_serialregs { /* SUPERIO uart register map */ struct ioc3_uartregs { + u8 iu_lcr; union { - u8 iu_rbr; /* read only, DLAB == 0 */ - u8 iu_thr; /* write only, DLAB == 0 */ - u8 iu_dll; /* DLAB == 1 */ + u8 iu_iir; /* read only */ + u8 iu_fcr; /* write only */ }; union { u8 iu_ier; /* DLAB == 0 */ u8 iu_dlm; /* DLAB == 1 */ }; union { - u8 iu_iir; /* read only */ - u8 iu_fcr; /* write only */ + u8 iu_rbr; /* read only, DLAB == 0 */ + u8 iu_thr; /* write only, DLAB == 0 */ + u8 iu_dll; /* DLAB == 1 */ }; - u8 iu_lcr; - u8 iu_mcr; - u8 iu_lsr; - u8 iu_msr; u8 iu_scr; + u8 iu_msr; + u8 iu_lsr; + u8 iu_mcr; }; struct ioc3_sioregs { u8 fill[0x141]; /* starts at 0x141 */ - u8 uartc; u8 kbdcg; + u8 uartc; - u8 fill0[0x150 - 0x142 - 1]; + u8 fill0[0x151 - 0x142 - 1]; - u8 pp_data; - u8 pp_dsr; u8 pp_dcr; + u8 pp_dsr; + u8 pp_data; - u8 fill1[0x158 - 0x152 - 1]; + u8 fill1[0x159 - 0x153 - 1]; - u8 pp_fifa; - u8 pp_cfgb; u8 pp_ecr; + u8 pp_cfgb; + u8 pp_fifa; - u8 fill2[0x168 - 0x15a - 1]; + u8 fill2[0x16a - 0x15b - 1]; - u8 rtcad; u8 rtcdat; + u8 rtcad; - u8 fill3[0x170 - 0x169 - 1]; + u8 fill3[0x170 - 0x16b - 1]; struct ioc3_uartregs uartb; /* 0x20170 */ struct ioc3_uartregs uarta; /* 0x20178 */ diff --git a/drivers/rtc/rtc-m48t35.c b/drivers/rtc/rtc-m48t35.c index d3a75d447fce..e8194f1f01a8 100644 --- a/drivers/rtc/rtc-m48t35.c +++ b/drivers/rtc/rtc-m48t35.c @@ -20,6 +20,16 @@ struct m48t35_rtc { u8 pad[0x7ff8]; /* starts at 0x7ff8 */ +#ifdef CONFIG_SGI_IP27 + u8 hour; + u8 min; + u8 sec; + u8 control; + u8 year; + u8 month; + u8 date; + u8 day; +#else u8 control; u8 sec; u8 min; @@ -28,6 +38,7 @@ struct m48t35_rtc { u8 date; u8 month; u8 year; +#endif }; #define M48T35_RTC_SET 0x80 diff --git a/drivers/tty/serial/8250/8250_ioc3.c b/drivers/tty/serial/8250/8250_ioc3.c index 2be6ed2967e0..4c405f1b9c67 100644 --- a/drivers/tty/serial/8250/8250_ioc3.c +++ b/drivers/tty/serial/8250/8250_ioc3.c @@ -23,12 +23,12 @@ struct ioc3_8250_data { static unsigned int ioc3_serial_in(struct uart_port *p, int offset) { - return readb(p->membase + offset); + return readb(p->membase + (offset ^ 3)); } static void ioc3_serial_out(struct uart_port *p, int offset, int value) { - writeb(value, p->membase + offset); + writeb(value, p->membase + (offset ^ 3)); } static int serial8250_ioc3_probe(struct platform_device *pdev) -- 2.13.7