Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757067Ab3FCKOG (ORCPT ); Mon, 3 Jun 2013 06:14:06 -0400 Received: from mail-we0-f171.google.com ([74.125.82.171]:62342 "EHLO mail-we0-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756814Ab3FCKNo (ORCPT ); Mon, 3 Jun 2013 06:13:44 -0400 From: Michal Simek To: linux-kernel@vger.kernel.org Cc: Michal Simek , Michal Simek , Arnd Bergmann , Timur Tabi , Jean-Christophe Plagniol-Villard , Tomi Valkeinen , linux-fbdev@vger.kernel.org Subject: [PATCH v4 6/7] video: xilinxfb: Add support for little endian accesses Date: Mon, 3 Jun 2013 12:13:21 +0200 Message-Id: <818df253e24e333befbbdb35c027a3cece1830a9.1370254386.git.michal.simek@xilinx.com> X-Mailer: git-send-email 1.8.2.3 In-Reply-To: References: In-Reply-To: References: Content-Type: multipart/signed; boundary="=_mimegpg-monstr-desktop-9798-1370254420-0001"; micalg=pgp-sha1; protocol="application/pgp-signature" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3370 Lines: 109 This is a MIME GnuPG-signed message. If you see this text, it means that your E-mail or Usenet software does not support MIME signed messages. The Internet standard for MIME PGP messages, RFC 2015, was published in 1996. To open this message correctly you will need to install E-mail or Usenet software that supports modern Internet standards. --=_mimegpg-monstr-desktop-9798-1370254420-0001 Dynamically detect endianess on IP and use ioread/iowrite functions instead of powerpc and microblaze specific out_be32. Signed-off-by: Michal Simek Acked-by: Arnd Bergmann --- Changes in v4: - Acked by Arnd Changes in v3: - New patch in this patchset based on discussions Changes in v2: None drivers/video/xilinxfb.c | 30 ++++++++++++++++++++++++++++-- 1 file changed, 28 insertions(+), 2 deletions(-) diff --git a/drivers/video/xilinxfb.c b/drivers/video/xilinxfb.c index bd3b85d..f3d4a69 100644 --- a/drivers/video/xilinxfb.c +++ b/drivers/video/xilinxfb.c @@ -117,6 +117,7 @@ static struct fb_var_screeninfo xilinx_fb_var = { #define BUS_ACCESS_FLAG 0x1 /* 1 = BUS, 0 = DCR */ +#define LITTLE_ENDIAN_ACCESS 0x2 /* LITTLE ENDIAN IO functions */ struct xilinxfb_drvdata { @@ -153,14 +154,33 @@ struct xilinxfb_drvdata { static void xilinx_fb_out32(struct xilinxfb_drvdata *drvdata, u32 offset, u32 val) { - if (drvdata->flags & BUS_ACCESS_FLAG) - out_be32(drvdata->regs + (offset << 2), val); + if (drvdata->flags & BUS_ACCESS_FLAG) { + if (drvdata->flags & LITTLE_ENDIAN_ACCESS) + iowrite32(val, drvdata->regs + (offset << 2)); + else + iowrite32be(val, drvdata->regs + (offset << 2)); + } #ifdef CONFIG_PPC_DCR else dcr_write(drvdata->dcr_host, offset, val); #endif } +static u32 xilinx_fb_in32(struct xilinxfb_drvdata *drvdata, u32 offset) +{ + if (drvdata->flags & BUS_ACCESS_FLAG) { + if (drvdata->flags & LITTLE_ENDIAN_ACCESS) + return ioread32(drvdata->regs + (offset << 2)); + else + return ioread32be(drvdata->regs + (offset << 2)); + } +#ifdef CONFIG_PPC_DCR + else + return dcr_read(drvdata->dcr_host, offset); +#endif + return 0; +} + static int xilinx_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi) @@ -271,6 +291,12 @@ static int xilinxfb_assign(struct platform_device *pdev, /* Tell the hardware where the frame buffer is */ xilinx_fb_out32(drvdata, REG_FB_ADDR, drvdata->fb_phys); + rc = xilinx_fb_in32(drvdata, REG_FB_ADDR); + /* Endianess detection */ + if (rc != drvdata->fb_phys) { + drvdata->flags |= LITTLE_ENDIAN_ACCESS; + xilinx_fb_out32(drvdata, REG_FB_ADDR, drvdata->fb_phys); + } /* Turn on the display */ drvdata->reg_ctrl_default = REG_CTRL_ENABLE; -- 1.8.2.3 --=_mimegpg-monstr-desktop-9798-1370254420-0001 Content-Type: application/pgp-signature Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iEYEABECAAYFAlGsbFQACgkQykllyylKDCF8ewCeLODXNYkSRQThULFJ0zXOP4Re YEMAn3ZN8ZHZ7SQCADewiGGiZoGTloV/ =aMDV -----END PGP SIGNATURE----- --=_mimegpg-monstr-desktop-9798-1370254420-0001-- -- 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/