Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758572Ab0FBTLN (ORCPT ); Wed, 2 Jun 2010 15:11:13 -0400 Received: from blue-ld-261.synserver.de ([217.119.54.83]:38156 "EHLO smtp-out-182.synserver.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1758521Ab0FBTLM (ORCPT ); Wed, 2 Jun 2010 15:11:12 -0400 X-SynServer-TrustedSrc: 1 X-SynServer-AuthUser: lars@laprican.de X-SynServer-PPID: 13236 From: Lars-Peter Clausen To: Ralf Baechle Cc: linux-mips@linux-mips.org, linux-kernel@vger.kernel.org, Lars-Peter Clausen Subject: [RFC][PATCH 12/26] MIPS: JZ4740: Add prom support Date: Wed, 2 Jun 2010 21:10:28 +0200 Message-Id: <1275505832-17185-4-git-send-email-lars@metafoo.de> X-Mailer: git-send-email 1.5.6.5 In-Reply-To: <1275505397-16758-1-git-send-email-lars@metafoo.de> References: <1275505397-16758-1-git-send-email-lars@metafoo.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2340 Lines: 92 This patch adds support for initializing arcs_cmdline on JZ4740 based machines and provides a prom_putchar implementation. Signed-off-by: Lars-Peter Clausen --- arch/mips/jz4740/prom.c | 69 +++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 69 insertions(+), 0 deletions(-) create mode 100644 arch/mips/jz4740/prom.c diff --git a/arch/mips/jz4740/prom.c b/arch/mips/jz4740/prom.c new file mode 100644 index 0000000..6518aee --- /dev/null +++ b/arch/mips/jz4740/prom.c @@ -0,0 +1,69 @@ +/* + * Copyright (C) 2010, Lars-Peter Clausen + * JZ4740 SoC prom code + * + * 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. + * + * 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., + * 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ + + +#include +#include +#include +#include + +#include + +#include +#include + +void jz4740_init_cmdline(int argc, char *argv[]) +{ + unsigned int count = COMMAND_LINE_SIZE - 1; + int i; + char *dst = &(arcs_cmdline[0]); + char *src; + + for (i = 1; i < argc && count; ++i) { + src = argv[i]; + while (*src && count) { + *dst++ = *src++; + --count; + } + *dst++ = ' '; + } + if (i > 1) + --dst; + + *dst = 0; +} + +void __init prom_init(void) +{ + jz4740_init_cmdline((int)fw_arg0, (char **)fw_arg1); + mips_machtype = MACH_INGENIC_JZ4740; +} + +void __init prom_free_prom_memory(void) +{ +} + +#define UART_REG(_reg) ((void __iomem *)(JZ4740_UART0_BASE_ADDR + (_reg << 2))) + +void prom_putchar(char c) +{ + uint8_t lsr; + + do { + lsr = readb(UART_REG(UART_LSR)); + } while ((lsr & UART_LSR_TEMT) == 0); + + writeb(c, UART_REG(UART_TX)); +} -- 1.5.6.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/