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author | Vimal Singh <vimalsingh@ti.com> | 2010-02-15 10:03:33 -0800 |
---|---|---|
committer | Tony Lindgren <tony@atomide.com> | 2010-02-15 10:03:33 -0800 |
commit | c2798e9342a1394de966c31703e0410ee3988378 (patch) | |
tree | 094ad60443db864d6db80d5c7c6497fade9fbbcc /arch/arm | |
parent | 2f70a1e93657bea0baa7d449aa49e44a08582dc8 (diff) | |
download | op-kernel-dev-c2798e9342a1394de966c31703e0410ee3988378.zip op-kernel-dev-c2798e9342a1394de966c31703e0410ee3988378.tar.gz |
omap3: SDP: Introducing 'board-sdp-flash.c' for flash init
This patch adds 'board-sdp-flash.c', which could be utilized
by boards similar to 3430SDP. (For ex: 2430sdp, 36030sdp).
This file does initialization for all three flash devices present
in SDP boards (NOR, NAND, OneNAND), by finding there 'cs' number
dynamically using switch setting information (S8: 1-4).
This also expects partition information from core board files (for
ex: board-3430sdp.c). Which allows to choose different default
partitions for different boards.
A new structure is created for this purpose: 'flash_partitions'
in 'mach/board-sdp.h'. This has two members:
1. struct mtd_partition *parts
2. int nr_parts
A board file is expected to fill this structure and pass it to
'sdp-flsash-init'. Partition information should be passed in
structure array of 'flash_partitions'. Partition information should
be passed in below sequence in array:
NOR
OneNAND
NAND
Signed-off-by: Vimal Singh <vimalsingh@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm')
-rw-r--r-- | arch/arm/mach-omap2/board-sdp-flash.c | 272 | ||||
-rw-r--r-- | arch/arm/mach-omap2/include/mach/board-sdp.h | 21 | ||||
-rw-r--r-- | arch/arm/plat-omap/include/plat/gpmc.h | 2 |
3 files changed, 295 insertions, 0 deletions
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..b1b88de --- /dev/null +++ b/arch/arm/mach-omap2/board-sdp-flash.c @@ -0,0 +1,272 @@ +/* + * 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-sdp.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 */ + +#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 struct physmap_flash_data sdp_nor_data = { + .width = 2, +}; + +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..465169c --- /dev/null +++ b/arch/arm/mach-omap2/include/mach/board-sdp.h @@ -0,0 +1,21 @@ +/* + * 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 <linux/mtd/mtd.h> +#include <linux/mtd/partitions.h> + +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 3f3609a..145838a 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) |