diff options
Diffstat (limited to 'arch/arm/mach-omap2/board-flash.c')
| -rw-r--r-- | arch/arm/mach-omap2/board-flash.c | 253 |
1 files changed, 253 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/board-flash.c b/arch/arm/mach-omap2/board-flash.c new file mode 100644 index 00000000000..ac834aa7abf --- /dev/null +++ b/arch/arm/mach-omap2/board-flash.c @@ -0,0 +1,253 @@ +/* + * board-sdp-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 <plat/gpmc.h> +#include <plat/nand.h> +#include <plat/onenand.h> +#include <plat/tc.h> +#include <mach/board-flash.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) { + printk(KERN_ERR "NOR: Can't request GPMC CS\n"); + return; + } + if (platform_device_register(&board_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 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); +} +#else +static void +__init board_onenand_init(struct mtd_partition *nor_parts, u8 nr_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 board_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 */ +}; + +void +__init board_nand_init(struct mtd_partition *nand_parts, u8 nr_parts, u8 cs) +{ + board_nand_data.cs = cs; + board_nand_data.parts = nand_parts; + board_nand_data.nr_parts = nr_parts; + + gpmc_nand_init(&board_nand_data); +} +#else +void +__init board_nand_init(struct mtd_partition *nand_parts, u8 nr_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 board_flash_init(struct flash_partitions partition_info[], + char chip_sel_board[][GPMC_CS_NUM]) +{ + 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_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) + printk(KERN_INFO "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) + printk(KERN_INFO "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) + printk(KERN_INFO "NAND: Unable to find configuration " + "in GPMC\n"); + else + board_nand_init(partition_info[2].parts, + partition_info[2].nr_parts, nandcs); +} |