| /* |
| * 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_HW; |
| 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 (!(__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; |
| } |
| |
| /** |
| * 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); |
| } |