From patchwork Mon Feb 7 08:46:58 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Adrian Hunter X-Patchwork-Id: 82081 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 4E3DAB70E2 for ; Mon, 7 Feb 2011 19:50:08 +1100 (EST) Received: from canuck.infradead.org ([2001:4978:20e::1]) by bombadil.infradead.org with esmtps (Exim 4.72 #1 (Red Hat Linux)) id 1PmMl2-00077L-2I; Mon, 07 Feb 2011 08:47:40 +0000 Received: from localhost ([127.0.0.1] helo=canuck.infradead.org) by canuck.infradead.org with esmtp (Exim 4.72 #1 (Red Hat Linux)) id 1PmMl0-0006Rp-Lk; Mon, 07 Feb 2011 08:47:38 +0000 Received: from smtp.nokia.com ([147.243.128.26] helo=mgw-da02.nokia.com) by canuck.infradead.org with esmtps (Exim 4.72 #1 (Red Hat Linux)) id 1PmMkT-0006PP-DX; Mon, 07 Feb 2011 08:47:06 +0000 Received: from localhost.localdomain ([172.21.23.156]) by mgw-da02.nokia.com (Switch-3.4.3/Switch-3.4.3) with ESMTP id p178l0sw022834; Mon, 7 Feb 2011 10:47:02 +0200 From: Adrian Hunter To: Tony Lindgren Subject: [PATCH 1/4] OMAP: OneNAND: fix 104MHz support Date: Mon, 7 Feb 2011 10:46:58 +0200 Message-Id: <1297068421-14430-2-git-send-email-adrian.hunter@nokia.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1297068421-14430-1-git-send-email-adrian.hunter@nokia.com> References: <1297068421-14430-1-git-send-email-adrian.hunter@nokia.com> X-Nokia-AV: Clean X-CRM114-Version: 20090807-BlameThorstenAndJenny ( TRE 0.7.6 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20110207_034705_661719_A907669D X-CRM114-Status: GOOD ( 12.38 ) X-Spam-Score: -0.0 (/) X-Spam-Report: SpamAssassin version 3.3.1 on canuck.infradead.org summary: Content analysis details: (-0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain Cc: Kyungmin Park , linux-omap Mailing List , linux-mtd Mailing List , linux-arm Mailing List X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-mtd-bounces@lists.infradead.org Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org 104MHz needs a latency of 8 clock cycles and the VHF flag must be set. Also t_rdyo is specified as "not applicable" so pick a lower value, and force at least 1 clk between AVD High to OE Low. Signed-off-by: Adrian Hunter --- arch/arm/mach-omap2/gpmc-onenand.c | 23 +++++++++++++++++------ include/linux/mtd/onenand_regs.h | 1 + 2 files changed, 18 insertions(+), 6 deletions(-) diff --git a/arch/arm/mach-omap2/gpmc-onenand.c b/arch/arm/mach-omap2/gpmc-onenand.c index 3a7d25f..3a4307b 100644 --- a/arch/arm/mach-omap2/gpmc-onenand.c +++ b/arch/arm/mach-omap2/gpmc-onenand.c @@ -94,7 +94,7 @@ static int omap2_onenand_set_async_mode(int cs, void __iomem *onenand_base) } static void set_onenand_cfg(void __iomem *onenand_base, int latency, - int sync_read, int sync_write, int hf) + int sync_read, int sync_write, int hf, int vhf) { u32 reg; @@ -114,6 +114,10 @@ static void set_onenand_cfg(void __iomem *onenand_base, int latency, reg |= ONENAND_SYS_CFG1_HF; else reg &= ~ONENAND_SYS_CFG1_HF; + if (vhf) + reg |= ONENAND_SYS_CFG1_VHF; + else + reg &= ~ONENAND_SYS_CFG1_VHF; writew(reg, onenand_base + ONENAND_REG_SYS_CFG1); } @@ -130,7 +134,7 @@ static int omap2_onenand_set_sync_mode(struct omap_onenand_platform_data *cfg, const int t_wph = 30; int min_gpmc_clk_period, t_ces, t_avds, t_avdh, t_ach, t_aavdh, t_rdyo; int tick_ns, div, fclk_offset_ns, fclk_offset, gpmc_clk_ns, latency; - int first_time = 0, hf = 0, sync_read = 0, sync_write = 0; + int first_time = 0, hf = 0, vhf = 0, sync_read = 0, sync_write = 0; int err, ticks_cez; int cs = cfg->cs; u32 reg; @@ -180,7 +184,7 @@ static int omap2_onenand_set_sync_mode(struct omap_onenand_platform_data *cfg, t_avdh = 2; t_ach = 3; t_aavdh = 6; - t_rdyo = 9; + t_rdyo = 6; break; case 83: min_gpmc_clk_period = 12000; /* 83 MHz */ @@ -217,7 +221,11 @@ static int omap2_onenand_set_sync_mode(struct omap_onenand_platform_data *cfg, gpmc_clk_ns = gpmc_ticks_to_ns(div); if (gpmc_clk_ns < 15) /* >66Mhz */ hf = 1; - if (hf) + if (gpmc_clk_ns < 12) /* >83Mhz */ + vhf = 1; + if (vhf) + latency = 8; + else if (hf) latency = 6; else if (gpmc_clk_ns >= 25) /* 40 MHz*/ latency = 3; @@ -226,7 +234,7 @@ static int omap2_onenand_set_sync_mode(struct omap_onenand_platform_data *cfg, if (first_time) set_onenand_cfg(onenand_base, latency, - sync_read, sync_write, hf); + sync_read, sync_write, hf, vhf); if (div == 1) { reg = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG2); @@ -264,6 +272,9 @@ static int omap2_onenand_set_sync_mode(struct omap_onenand_platform_data *cfg, /* Read */ t.adv_rd_off = gpmc_ticks_to_ns(fclk_offset + gpmc_ns_to_ticks(t_avdh)); t.oe_on = gpmc_ticks_to_ns(fclk_offset + gpmc_ns_to_ticks(t_ach)); + /* Force at least 1 clk between AVD High to OE Low */ + if (t.oe_on <= t.adv_rd_off) + t.oe_on = t.adv_rd_off + gpmc_round_ns_to_ticks(1); t.access = gpmc_ticks_to_ns(fclk_offset + (latency + 1) * div); t.oe_off = t.access + gpmc_round_ns_to_ticks(1); t.cs_rd_off = t.oe_off; @@ -317,7 +328,7 @@ static int omap2_onenand_set_sync_mode(struct omap_onenand_platform_data *cfg, if (err) return err; - set_onenand_cfg(onenand_base, latency, sync_read, sync_write, hf); + set_onenand_cfg(onenand_base, latency, sync_read, sync_write, hf, vhf); return 0; } diff --git a/include/linux/mtd/onenand_regs.h b/include/linux/mtd/onenand_regs.h index cd6f3b4..d60130f 100644 --- a/include/linux/mtd/onenand_regs.h +++ b/include/linux/mtd/onenand_regs.h @@ -168,6 +168,7 @@ #define ONENAND_SYS_CFG1_INT (1 << 6) #define ONENAND_SYS_CFG1_IOBE (1 << 5) #define ONENAND_SYS_CFG1_RDY_CONF (1 << 4) +#define ONENAND_SYS_CFG1_VHF (1 << 3) #define ONENAND_SYS_CFG1_HF (1 << 2) #define ONENAND_SYS_CFG1_SYNC_WRITE (1 << 1)