From patchwork Wed Jan 13 06:53:04 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: vimal singh X-Patchwork-Id: 72510 X-Patchwork-Delegate: tony@atomide.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.3/8.14.2) with ESMTP id o0D6r8kI005051 for ; Wed, 13 Jan 2010 06:53:27 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754911Ab0AMGx0 (ORCPT ); Wed, 13 Jan 2010 01:53:26 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754913Ab0AMGx0 (ORCPT ); Wed, 13 Jan 2010 01:53:26 -0500 Received: from mail-bw0-f227.google.com ([209.85.218.227]:43455 "EHLO mail-bw0-f227.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753634Ab0AMGx0 (ORCPT ); Wed, 13 Jan 2010 01:53:26 -0500 Received: by bwz27 with SMTP id 27so1716281bwz.21 for ; Tue, 12 Jan 2010 22:53:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:from:date:message-id :subject:to:cc:content-type; bh=tlRd5Ik4ZPnLXNagwwU9Hc+OdPjIiOKHZaaYpd3tQdU=; b=xFtDxRq60dA0LggT7Hep1OVDCs1eE895n/IVTrj82u39+7RSBfy5wP7VyiuwLRufDM SK7b2sQj96fq6jCqCXLWCXad6Cjp1m7At4KecdllgNJTZOTsM3Rznu9qhREvgwy2a5RB M9KyG18BA6DaHVM4b9JbGXt6u7BuFNlCpeL/o= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:from:date:message-id:subject:to:cc:content-type; b=ov0MJZTxkJeMOfliUNmycLmiOj6qFCqcrt9+LUq0T2IEulhbiJ2XJNCXPNoI0nbIEy Y3YI9QzerjDie6viQa2RyWeK1aZaN9FL6BYC09imAU7afUnQXdw3VzbyO2143ix7v7/u QP6u2tgn29tdiebubg7JWDa5x2jE5DIg903Pw= MIME-Version: 1.0 Received: by 10.204.35.139 with SMTP id p11mr4702223bkd.178.1263365604140; Tue, 12 Jan 2010 22:53:24 -0800 (PST) From: Vimal Singh Date: Wed, 13 Jan 2010 12:23:04 +0530 Message-ID: Subject: [PATCH 2/3] OMAP: SDP: Introducing 'board-sdp-flash.c' for flash init To: linux-omap@vger.kernel.org Cc: Tony Lindgren Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org diff --git a/arch/arm/mach-omap2/board-sdp-flash.c b/arch/arm/mach-omap2/board-sdp-flash.c new file mode 100644 index 0000000..54ef19f --- /dev/null +++ b/arch/arm/mach-omap2/board-sdp-flash.c @@ -0,0 +1,295 @@ +/* + * board-sdp-flash.c + * Modified from mach-omap2/board-3430sdp-flash.c + * + * Copyright (C) 2009 Nokia Corporation + * Copyright (C) 2009 Texas Instruments + * + * Vimal Singh + * + * 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. + */ + +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +#define REG_FPGA_REV 0x10 +#define REG_FPGA_DIP_SWITCH_INPUT2 0x60 +#define MAX_SUPPORTED_GPMC_CONFIG 3 + +#define DEBUG_BASE 0x08000000 /* debug board */ + +#define PDC_NOR 1 +#define PDC_NAND 2 +#define PDC_ONENAND 3 +#define DBG_MPDB 4 + +/* various memory sizes */ +#define FLASH_SIZE_SDPV1 SZ_64M /* NOR flash (64 Meg aligned) */ +#define FLASH_SIZE_SDPV2 SZ_128M /* NOR flash (256 Meg aligned) */ + +/* + * SDP3430 V2 Board CS organization + * Different from SDP3430 V1. Now 4 switches used to specify CS + * + * See also the Switch S8 settings in the comments. + * + * REVISIT: Add support for 2430 SDP + */ +static const unsigned char chip_sel_sdp[][GPMC_CS_NUM] = { + {PDC_NOR, PDC_NAND, PDC_ONENAND, DBG_MPDB, 0, 0, 0, 0}, /* S8:1111 */ + {PDC_ONENAND, PDC_NAND, PDC_NOR, DBG_MPDB, 0, 0, 0, 0}, /* S8:1110 */ + {PDC_NAND, PDC_ONENAND, PDC_NOR, DBG_MPDB, 0, 0, 0, 0}, /* S8:1101 */ +}; + +static void omap_set_vpp(struct map_info *map, int enable) +{ + static int count; + u32 l; + + if (cpu_class_is_omap1()) { + if (enable) { + if (count++ == 0) { + l = omap_readl(EMIFS_CONFIG); + l |= OMAP_EMIFS_CONFIG_WP; + omap_writel(l, EMIFS_CONFIG); + } + } else { + if (count && (--count == 0)) { + l = omap_readl(EMIFS_CONFIG); + l &= ~OMAP_EMIFS_CONFIG_WP; + omap_writel(l, EMIFS_CONFIG); + } + } + } +} + +static struct physmap_flash_data sdp_nor_data = { + .width = 2, + .set_vpp = omap_set_vpp, +}; + +static struct resource sdp_nor_resource = { + .flags = IORESOURCE_MEM, +}; + +static struct platform_device sdp_nor_device = { + .name = "physmap-flash", + .id = 0, + .dev = { + .platform_data = &sdp_nor_data, + }, + .num_resources = 1, + .resource = &sdp_nor_resource, +}; + +static void +__init board_nor_init(struct flash_partitions sdp_nor_parts, u8 cs) +{ + int err; + + sdp_nor_data.parts = sdp_nor_parts.parts; + sdp_nor_data.nr_parts = sdp_nor_parts.nr_parts; + + /* Configure start address and size of NOR device */ + if (omap_rev() >= OMAP3430_REV_ES1_0) { + err = gpmc_cs_request(cs, FLASH_SIZE_SDPV2 - 1, + (unsigned long *)&sdp_nor_resource.start); + sdp_nor_resource.end = sdp_nor_resource.start + + FLASH_SIZE_SDPV2 - 1; + } else { + err = gpmc_cs_request(cs, FLASH_SIZE_SDPV1 - 1, + (unsigned long *)&sdp_nor_resource.start); + sdp_nor_resource.end = sdp_nor_resource.start + + FLASH_SIZE_SDPV1 - 1; + } + if (err < 0) { + printk(KERN_ERR "NOR: Can't request GPMC CS\n"); + return; + } + if (platform_device_register(&sdp_nor_device) < 0) + printk(KERN_ERR "Unable to register NOR device\n"); +} + +#if defined(CONFIG_MTD_ONENAND_OMAP2) || \ + defined(CONFIG_MTD_ONENAND_OMAP2_MODULE) +static struct omap_onenand_platform_data board_onenand_data = { + .dma_channel = -1, /* disable DMA in OMAP OneNAND driver */ +}; + +static void +__init board_onenand_init(struct flash_partitions sdp_onenand_parts, u8 cs) +{ + board_onenand_data.cs = cs; + board_onenand_data.parts = sdp_onenand_parts.parts; + board_onenand_data.nr_parts = sdp_onenand_parts.nr_parts; + + gpmc_onenand_init(&board_onenand_data); +} +#else +static void +__init board_onenand_init(struct flash_partitions sdp_onenand_parts, u8 cs) +{ +} +#endif /* CONFIG_MTD_ONENAND_OMAP2 || CONFIG_MTD_ONENAND_OMAP2_MODULE */ + +#if defined(CONFIG_MTD_NAND_OMAP2) || \ + defined(CONFIG_MTD_NAND_OMAP2_MODULE) + +/* Note that all values in this struct are in nanoseconds */ +static struct gpmc_timings nand_timings = { + + .sync_clk = 0, + + .cs_on = 0, + .cs_rd_off = 36, + .cs_wr_off = 36, + + .adv_on = 6, + .adv_rd_off = 24, + .adv_wr_off = 36, + + .we_off = 30, + .oe_off = 48, + + .access = 54, + .rd_cycle = 72, + .wr_cycle = 72, + + .wr_access = 30, + .wr_data_mux_bus = 0, +}; + +static struct omap_nand_platform_data sdp_nand_data = { + .nand_setup = NULL, + .gpmc_t = &nand_timings, + .dma_channel = -1, /* disable DMA in OMAP NAND driver */ + .dev_ready = NULL, + .devsize = 0, /* '0' for 8-bit, '1' for 16-bit device */ +}; + +static void +__init board_nand_init(struct flash_partitions sdp_nand_parts, u8 cs) +{ + sdp_nand_data.cs = cs; + sdp_nand_data.parts = sdp_nand_parts.parts; + sdp_nand_data.nr_parts = sdp_nand_parts.nr_parts; + + sdp_nand_data.gpmc_cs_baseaddr = (void *)(OMAP34XX_GPMC_VIRT + + GPMC_CS0_BASE + + cs * GPMC_CS_SIZE); + sdp_nand_data.gpmc_baseaddr = (void *) (OMAP34XX_GPMC_VIRT); + + gpmc_nand_init(&sdp_nand_data); +} +#else +static void +__init board_nand_init(struct flash_partitions sdp_nand_parts, u8 cs) +{ +} +#endif /* CONFIG_MTD_NAND_OMAP2 || CONFIG_MTD_NAND_OMAP2_MODULE */ + +/** + * get_gpmc0_type - Reads the FPGA DIP_SWITCH_INPUT_REGISTER2 to get + * the various cs values. + */ +static u8 get_gpmc0_type(void) +{ + u8 cs = 0; + void __iomem *fpga_map_addr; + + fpga_map_addr = ioremap(DEBUG_BASE, 4096); + if (!fpga_map_addr) + return -ENOMEM; + + if (!(__raw_readw(fpga_map_addr + REG_FPGA_REV))) + /* we dont have an DEBUG FPGA??? */ + /* Depend on #defines!! default to strata boot return param */ + goto unmap; + + /* S8-DIP-OFF = 1, S8-DIP-ON = 0 */ + cs = __raw_readw(fpga_map_addr + REG_FPGA_DIP_SWITCH_INPUT2) & 0xf; + + /* ES2.0 SDP's onwards 4 dip switches are provided for CS */ + if (omap_rev() >= OMAP3430_REV_ES1_0) + /* change (S8-1:4=DS-2:0) to (S8-4:1=DS-2:0) */ + cs = ((cs & 8) >> 3) | ((cs & 4) >> 1) | + ((cs & 2) << 1) | ((cs & 1) << 3); + else + /* change (S8-1:3=DS-2:0) to (S8-3:1=DS-2:0) */ + cs = ((cs & 4) >> 2) | (cs & 2) | ((cs & 1) << 2); +unmap: + iounmap(fpga_map_addr); + return cs; +} + +/** + * sdp3430_flash_init - Identify devices connected to GPMC and register. + * + * @return - void. + */ +void __init sdp_flash_init(struct flash_partitions sdp_partition_info[]) +{ + u8 cs = 0; + u8 norcs = GPMC_CS_NUM + 1; + u8 nandcs = GPMC_CS_NUM + 1; + u8 onenandcs = GPMC_CS_NUM + 1; + u8 idx; + unsigned char *config_sel = NULL; + + /* REVISIT: Is this return correct idx for 2430 SDP? + * for which cs configuration matches for 2430 SDP? + */ + idx = get_gpmc0_type(); + if (idx >= MAX_SUPPORTED_GPMC_CONFIG) { + printk(KERN_ERR "%s: Invalid chip select: %d\n", __func__, cs); + return; + } + config_sel = (unsigned char *)(chip_sel_sdp[idx]); + + while (cs < GPMC_CS_NUM) { + switch (config_sel[cs]) { + case PDC_NOR: + if (norcs > GPMC_CS_NUM) + norcs = cs; + break; + case PDC_NAND: + if (nandcs > GPMC_CS_NUM) + nandcs = cs; + break; + case PDC_ONENAND: + if (onenandcs > GPMC_CS_NUM) + onenandcs = cs; + break; + }; + cs++; + } + + if (norcs > GPMC_CS_NUM) + printk(KERN_INFO "OneNAND: Unable to find configuration " + " in GPMC\n "); + else + board_nor_init(sdp_partition_info[0], norcs); + + if (onenandcs > GPMC_CS_NUM) + printk(KERN_INFO "OneNAND: Unable to find configuration " + " in GPMC\n "); + else + board_onenand_init(sdp_partition_info[1], onenandcs); + + if (nandcs > GPMC_CS_NUM) + printk(KERN_INFO "NAND: Unable to find configuration " + " in GPMC\n "); + else + board_nand_init(sdp_partition_info[2], nandcs); +} diff --git a/arch/arm/mach-omap2/include/mach/board-sdp.h b/arch/arm/mach-omap2/include/mach/board-sdp.h new file mode 100644 index 0000000..a2f7ba2 --- /dev/null +++ b/arch/arm/mach-omap2/include/mach/board-sdp.h @@ -0,0 +1,22 @@ +/* + * board-sdp.h + * + * Information structures for SDP-specific board config data + * + * Copyright (C) 2009 Nokia Corporation + * Copyright (C) 2009 Texas Instruments + * + * 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. + */ +#include +#include + +struct flash_partitions { + struct mtd_partition *parts; + int nr_parts; +}; + +extern void sdp_flash_init(struct flash_partitions []); + diff --git a/arch/arm/plat-omap/include/plat/gpmc.h b/arch/arm/plat-omap/include/plat/gpmc.h index e081338..4090749 100644 --- a/arch/arm/plat-omap/include/plat/gpmc.h +++ b/arch/arm/plat-omap/include/plat/gpmc.h @@ -27,6 +27,8 @@ #define GPMC_CONFIG 0x50 #define GPMC_STATUS 0x54 +#define GPMC_CS0_BASE 0x60 +#define GPMC_CS_SIZE 0x30 #define GPMC_CONFIG1_WRAPBURST_SUPP (1 << 31) #define GPMC_CONFIG1_READMULTIPLE_SUPP (1 << 30)