/* * board-flash.c * Modified from mach-omap2/board-3430sdp-flash.c * * Copyright (C) 2009 Nokia Corporation * Copyright (C) 2009 Texas Instruments * * Vimal Singh <vimalsingh@ti.com> * * 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 <linux/kernel.h> #include <linux/platform_device.h> #include <linux/mtd/physmap.h> #include <linux/io.h> #include <linux/platform_data/mtd-nand-omap2.h> #include <linux/platform_data/mtd-onenand-omap2.h> #include "soc.h" #include "common.h" #include "board-flash.h" #include "gpmc-onenand.h" #include "gpmc-nand.h" #define REG_FPGA_REV 0x10 #define REG_FPGA_DIP_SWITCH_INPUT2 0x60 #define MAX_SUPPORTED_GPMC_CONFIG 3 #define DEBUG_BASE 0x08000000 /* debug board */ /* 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) */ static struct physmap_flash_data board_nor_data = { .width = 2, }; static struct resource board_nor_resource = { .flags = IORESOURCE_MEM, }; static struct platform_device board_nor_device = { .name = "physmap-flash", .id = 0, .dev = { .platform_data = &board_nor_data, }, .num_resources = 1, .resource = &board_nor_resource, }; static void __init board_nor_init(struct mtd_partition *nor_parts, u8 nr_parts, u8 cs) { int err; board_nor_data.parts = nor_parts; board_nor_data.nr_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 *)&board_nor_resource.start); board_nor_resource.end = board_nor_resource.start + FLASH_SIZE_SDPV2 - 1; } else { err = gpmc_cs_request(cs, FLASH_SIZE_SDPV1 - 1, (unsigned long *)&board_nor_resource.start); board_nor_resource.end = board_nor_resource.start + FLASH_SIZE_SDPV1 - 1; } if (err < 0) { pr_err("NOR: Can't request GPMC CS\n"); return; } if (platform_device_register(&board_nor_device) < 0) pr_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 */ }; void __init board_onenand_init(struct mtd_partition *onenand_parts, u8 nr_parts, u8 cs) { board_onenand_data.cs = cs; board_onenand_data.parts = onenand_parts; board_onenand_data.nr_parts = nr_parts; gpmc_onenand_init(&board_onenand_data); } #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 */ struct gpmc_timings nand_default_timings[1] = { { .sync_clk = 0, .cs_on = 0, .cs_rd_off = 36, .cs_wr_off = 36, .we_on = 6, .oe_on = 6, .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 board_nand_data; void __init board_nand_init(struct mtd_partition *nand_parts, u8 nr_parts, u8 cs, int nand_type, struct gpmc_timings *gpmc_t) { board_nand_data.cs = cs; board_nand_data.parts = nand_parts; board_nand_data.nr_parts = nr_parts; board_nand_data.devsize = nand_type; board_nand_data.ecc_opt = OMAP_ECC_HAM1_CODE_SW; gpmc_nand_init(&board_nand_data, gpmc_t); } #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 (!(readw_relaxed(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 = readw_relaxed(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; } /** * board_flash_init - Identify devices connected to GPMC and register. * * @return - void. */ void __init board_flash_init(struct flash_partitions partition_info[], char chip_sel_board[][GPMC_CS_NUM], int nand_type) { 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) { pr_err("%s: Invalid chip select: %d\n", __func__, cs); return; } config_sel = (unsigned char *)(chip_sel_board[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) pr_err("NOR: Unable to find configuration in GPMC\n"); else board_nor_init(partition_info[0].parts, partition_info[0].nr_parts, norcs); if (onenandcs > GPMC_CS_NUM) pr_err("OneNAND: Unable to find configuration in GPMC\n"); else board_onenand_init(partition_info[1].parts, partition_info[1].nr_parts, onenandcs); if (nandcs > GPMC_CS_NUM) pr_err("NAND: Unable to find configuration in GPMC\n"); else board_nand_init(partition_info[2].parts, partition_info[2].nr_parts, nandcs, nand_type, nand_default_timings); }