diff options
Diffstat (limited to 'drivers/mtd/maps/dilnetpc.c')
| -rw-r--r-- | drivers/mtd/maps/dilnetpc.c | 496 |
1 files changed, 0 insertions, 496 deletions
diff --git a/drivers/mtd/maps/dilnetpc.c b/drivers/mtd/maps/dilnetpc.c deleted file mode 100644 index 3e393f0..0000000 --- a/drivers/mtd/maps/dilnetpc.c +++ /dev/null @@ -1,496 +0,0 @@ -/* dilnetpc.c -- MTD map driver for SSV DIL/Net PC Boards "DNP" and "ADNP" - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA - * - * The DIL/Net PC is a tiny embedded PC board made by SSV Embedded Systems - * featuring the AMD Elan SC410 processor. There are two variants of this - * board: DNP/1486 and ADNP/1486. The DNP version has 2 megs of flash - * ROM (Intel 28F016S3) and 8 megs of DRAM, the ADNP version has 4 megs - * flash and 16 megs of RAM. - * For details, see http://www.ssv-embedded.de/ssv/pc104/p169.htm - * and http://www.ssv-embedded.de/ssv/pc104/p170.htm - */ - -#include <linux/module.h> -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/string.h> - -#include <linux/mtd/mtd.h> -#include <linux/mtd/map.h> -#include <linux/mtd/partitions.h> -#include <linux/mtd/concat.h> - -#include <asm/io.h> - -/* -** The DIL/NetPC keeps its BIOS in two distinct flash blocks. -** Destroying any of these blocks transforms the DNPC into -** a paperweight (albeit not a very useful one, considering -** it only weighs a few grams). -** -** Therefore, the BIOS blocks must never be erased or written to -** except by people who know exactly what they are doing (e.g. -** to install a BIOS update). These partitions are marked read-only -** by default, but can be made read/write by undefining -** DNPC_BIOS_BLOCKS_WRITEPROTECTED: -*/ -#define DNPC_BIOS_BLOCKS_WRITEPROTECTED - -/* -** The ID string (in ROM) is checked to determine whether we -** are running on a DNP/1486 or ADNP/1486 -*/ -#define BIOSID_BASE 0x000fe100 - -#define ID_DNPC "DNP1486" -#define ID_ADNP "ADNP1486" - -/* -** Address where the flash should appear in CPU space -*/ -#define FLASH_BASE 0x2000000 - -/* -** Chip Setup and Control (CSC) indexed register space -*/ -#define CSC_INDEX 0x22 -#define CSC_DATA 0x23 - -#define CSC_MMSWAR 0x30 /* MMS window C-F attributes register */ -#define CSC_MMSWDSR 0x31 /* MMS window C-F device select register */ - -#define CSC_RBWR 0xa7 /* GPIO Read-Back/Write Register B */ - -#define CSC_CR 0xd0 /* internal I/O device disable/Echo */ - /* Z-bus/configuration register */ - -#define CSC_PCCMDCR 0xf1 /* PC card mode and DMA control register */ - - -/* -** PC Card indexed register space: -*/ - -#define PCC_INDEX 0x3e0 -#define PCC_DATA 0x3e1 - -#define PCC_AWER_B 0x46 /* Socket B Address Window enable register */ -#define PCC_MWSAR_1_Lo 0x58 /* memory window 1 start address low register */ -#define PCC_MWSAR_1_Hi 0x59 /* memory window 1 start address high register */ -#define PCC_MWEAR_1_Lo 0x5A /* memory window 1 stop address low register */ -#define PCC_MWEAR_1_Hi 0x5B /* memory window 1 stop address high register */ -#define PCC_MWAOR_1_Lo 0x5C /* memory window 1 address offset low register */ -#define PCC_MWAOR_1_Hi 0x5D /* memory window 1 address offset high register */ - - -/* -** Access to SC4x0's Chip Setup and Control (CSC) -** and PC Card (PCC) indexed registers: -*/ -static inline void setcsc(int reg, unsigned char data) -{ - outb(reg, CSC_INDEX); - outb(data, CSC_DATA); -} - -static inline unsigned char getcsc(int reg) -{ - outb(reg, CSC_INDEX); - return(inb(CSC_DATA)); -} - -static inline void setpcc(int reg, unsigned char data) -{ - outb(reg, PCC_INDEX); - outb(data, PCC_DATA); -} - -static inline unsigned char getpcc(int reg) -{ - outb(reg, PCC_INDEX); - return(inb(PCC_DATA)); -} - - -/* -************************************************************ -** Enable access to DIL/NetPC's flash by mapping it into -** the SC4x0's MMS Window C. -************************************************************ -*/ -static void dnpc_map_flash(unsigned long flash_base, unsigned long flash_size) -{ - unsigned long flash_end = flash_base + flash_size - 1; - - /* - ** enable setup of MMS windows C-F: - */ - /* - enable PC Card indexed register space */ - setcsc(CSC_CR, getcsc(CSC_CR) | 0x2); - /* - set PC Card controller to operate in standard mode */ - setcsc(CSC_PCCMDCR, getcsc(CSC_PCCMDCR) & ~1); - - /* - ** Program base address and end address of window - ** where the flash ROM should appear in CPU address space - */ - setpcc(PCC_MWSAR_1_Lo, (flash_base >> 12) & 0xff); - setpcc(PCC_MWSAR_1_Hi, (flash_base >> 20) & 0x3f); - setpcc(PCC_MWEAR_1_Lo, (flash_end >> 12) & 0xff); - setpcc(PCC_MWEAR_1_Hi, (flash_end >> 20) & 0x3f); - - /* program offset of first flash location to appear in this window (0) */ - setpcc(PCC_MWAOR_1_Lo, ((0 - flash_base) >> 12) & 0xff); - setpcc(PCC_MWAOR_1_Hi, ((0 - flash_base)>> 20) & 0x3f); - - /* set attributes for MMS window C: non-cacheable, write-enabled */ - setcsc(CSC_MMSWAR, getcsc(CSC_MMSWAR) & ~0x11); - - /* select physical device ROMCS0 (i.e. flash) for MMS Window C */ - setcsc(CSC_MMSWDSR, getcsc(CSC_MMSWDSR) & ~0x03); - - /* enable memory window 1 */ - setpcc(PCC_AWER_B, getpcc(PCC_AWER_B) | 0x02); - - /* now disable PC Card indexed register space again */ - setcsc(CSC_CR, getcsc(CSC_CR) & ~0x2); -} - - -/* -************************************************************ -** Disable access to DIL/NetPC's flash by mapping it into -** the SC4x0's MMS Window C. -************************************************************ -*/ -static void dnpc_unmap_flash(void) -{ - /* - enable PC Card indexed register space */ - setcsc(CSC_CR, getcsc(CSC_CR) | 0x2); - - /* disable memory window 1 */ - setpcc(PCC_AWER_B, getpcc(PCC_AWER_B) & ~0x02); - - /* now disable PC Card indexed register space again */ - setcsc(CSC_CR, getcsc(CSC_CR) & ~0x2); -} - - - -/* -************************************************************ -** Enable/Disable VPP to write to flash -************************************************************ -*/ - -static DEFINE_SPINLOCK(dnpc_spin); -static int vpp_counter = 0; -/* -** This is what has to be done for the DNP board .. -*/ -static void dnp_set_vpp(struct map_info *not_used, int on) -{ - spin_lock_irq(&dnpc_spin); - - if (on) - { - if(++vpp_counter == 1) - setcsc(CSC_RBWR, getcsc(CSC_RBWR) & ~0x4); - } - else - { - if(--vpp_counter == 0) - setcsc(CSC_RBWR, getcsc(CSC_RBWR) | 0x4); - else - BUG_ON(vpp_counter < 0); - } - spin_unlock_irq(&dnpc_spin); -} - -/* -** .. and this the ADNP version: -*/ -static void adnp_set_vpp(struct map_info *not_used, int on) -{ - spin_lock_irq(&dnpc_spin); - - if (on) - { - if(++vpp_counter == 1) - setcsc(CSC_RBWR, getcsc(CSC_RBWR) & ~0x8); - } - else - { - if(--vpp_counter == 0) - setcsc(CSC_RBWR, getcsc(CSC_RBWR) | 0x8); - else - BUG_ON(vpp_counter < 0); - } - spin_unlock_irq(&dnpc_spin); -} - - - -#define DNP_WINDOW_SIZE 0x00200000 /* DNP flash size is 2MiB */ -#define ADNP_WINDOW_SIZE 0x00400000 /* ADNP flash size is 4MiB */ -#define WINDOW_ADDR FLASH_BASE - -static struct map_info dnpc_map = { - .name = "ADNP Flash Bank", - .size = ADNP_WINDOW_SIZE, - .bankwidth = 1, - .set_vpp = adnp_set_vpp, - .phys = WINDOW_ADDR -}; - -/* -** The layout of the flash is somewhat "strange": -** -** 1. 960 KiB (15 blocks) : Space for ROM Bootloader and user data -** 2. 64 KiB (1 block) : System BIOS -** 3. 960 KiB (15 blocks) : User Data (DNP model) or -** 3. 3008 KiB (47 blocks) : User Data (ADNP model) -** 4. 64 KiB (1 block) : System BIOS Entry -*/ - -static struct mtd_partition partition_info[]= -{ - { - .name = "ADNP boot", - .offset = 0, - .size = 0xf0000, - }, - { - .name = "ADNP system BIOS", - .offset = MTDPART_OFS_NXTBLK, - .size = 0x10000, -#ifdef DNPC_BIOS_BLOCKS_WRITEPROTECTED - .mask_flags = MTD_WRITEABLE, -#endif - }, - { - .name = "ADNP file system", - .offset = MTDPART_OFS_NXTBLK, - .size = 0x2f0000, - }, - { - .name = "ADNP system BIOS entry", - .offset = MTDPART_OFS_NXTBLK, - .size = MTDPART_SIZ_FULL, -#ifdef DNPC_BIOS_BLOCKS_WRITEPROTECTED - .mask_flags = MTD_WRITEABLE, -#endif - }, -}; - -#define NUM_PARTITIONS ARRAY_SIZE(partition_info) - -static struct mtd_info *mymtd; -static struct mtd_info *lowlvl_parts[NUM_PARTITIONS]; -static struct mtd_info *merged_mtd; - -/* -** "Highlevel" partition info: -** -** Using the MTD concat layer, we can re-arrange partitions to our -** liking: we construct a virtual MTD device by concatenating the -** partitions, specifying the sequence such that the boot block -** is immediately followed by the filesystem block (i.e. the stupid -** system BIOS block is mapped to a different place). When re-partitioning -** this concatenated MTD device, we can set the boot block size to -** an arbitrary (though erase block aligned) value i.e. not one that -** is dictated by the flash's physical layout. We can thus set the -** boot block to be e.g. 64 KB (which is fully sufficient if we want -** to boot an etherboot image) or to -say- 1.5 MB if we want to boot -** a large kernel image. In all cases, the remainder of the flash -** is available as file system space. -*/ - -static struct mtd_partition higlvl_partition_info[]= -{ - { - .name = "ADNP boot block", - .offset = 0, - .size = CONFIG_MTD_DILNETPC_BOOTSIZE, - }, - { - .name = "ADNP file system space", - .offset = MTDPART_OFS_NXTBLK, - .size = ADNP_WINDOW_SIZE-CONFIG_MTD_DILNETPC_BOOTSIZE-0x20000, - }, - { - .name = "ADNP system BIOS + BIOS Entry", - .offset = MTDPART_OFS_NXTBLK, - .size = MTDPART_SIZ_FULL, -#ifdef DNPC_BIOS_BLOCKS_WRITEPROTECTED - .mask_flags = MTD_WRITEABLE, -#endif - }, -}; - -#define NUM_HIGHLVL_PARTITIONS ARRAY_SIZE(higlvl_partition_info) - - -static int dnp_adnp_probe(void) -{ - char *biosid, rc = -1; - - biosid = (char*)ioremap(BIOSID_BASE, 16); - if(biosid) - { - if(!strcmp(biosid, ID_DNPC)) - rc = 1; /* this is a DNPC */ - else if(!strcmp(biosid, ID_ADNP)) - rc = 0; /* this is a ADNPC */ - } - iounmap((void *)biosid); - return(rc); -} - - -static int __init init_dnpc(void) -{ - int is_dnp; - - /* - ** determine hardware (DNP/ADNP/invalid) - */ - if((is_dnp = dnp_adnp_probe()) < 0) - return -ENXIO; - - /* - ** Things are set up for ADNP by default - ** -> modify all that needs to be different for DNP - */ - if(is_dnp) - { /* - ** Adjust window size, select correct set_vpp function. - ** The partitioning scheme is identical on both DNP - ** and ADNP except for the size of the third partition. - */ - int i; - dnpc_map.size = DNP_WINDOW_SIZE; - dnpc_map.set_vpp = dnp_set_vpp; - partition_info[2].size = 0xf0000; - - /* - ** increment all string pointers so the leading 'A' gets skipped, - ** thus turning all occurrences of "ADNP ..." into "DNP ..." - */ - ++dnpc_map.name; - for(i = 0; i < NUM_PARTITIONS; i++) - ++partition_info[i].name; - higlvl_partition_info[1].size = DNP_WINDOW_SIZE - - CONFIG_MTD_DILNETPC_BOOTSIZE - 0x20000; - for(i = 0; i < NUM_HIGHLVL_PARTITIONS; i++) - ++higlvl_partition_info[i].name; - } - - printk(KERN_NOTICE "DIL/Net %s flash: 0x%lx at 0x%llx\n", - is_dnp ? "DNPC" : "ADNP", dnpc_map.size, (unsigned long long)dnpc_map.phys); - - dnpc_map.virt = ioremap_nocache(dnpc_map.phys, dnpc_map.size); - - dnpc_map_flash(dnpc_map.phys, dnpc_map.size); - - if (!dnpc_map.virt) { - printk("Failed to ioremap_nocache\n"); - return -EIO; - } - simple_map_init(&dnpc_map); - - printk("FLASH virtual address: 0x%p\n", dnpc_map.virt); - - mymtd = do_map_probe("jedec_probe", &dnpc_map); - - if (!mymtd) - mymtd = do_map_probe("cfi_probe", &dnpc_map); - - /* - ** If flash probes fail, try to make flashes accessible - ** at least as ROM. Ajust erasesize in this case since - ** the default one (128M) will break our partitioning - */ - if (!mymtd) - if((mymtd = do_map_probe("map_rom", &dnpc_map))) - mymtd->erasesize = 0x10000; - - if (!mymtd) { - iounmap(dnpc_map.virt); - return -ENXIO; - } - - mymtd->owner = THIS_MODULE; - - /* - ** Supply pointers to lowlvl_parts[] array to add_mtd_partitions() - ** -> add_mtd_partitions() will _not_ register MTD devices for - ** the partitions, but will instead store pointers to the MTD - ** objects it creates into our lowlvl_parts[] array. - ** NOTE: we arrange the pointers such that the sequence of the - ** partitions gets re-arranged: partition #2 follows - ** partition #0. - */ - partition_info[0].mtdp = &lowlvl_parts[0]; - partition_info[1].mtdp = &lowlvl_parts[2]; - partition_info[2].mtdp = &lowlvl_parts[1]; - partition_info[3].mtdp = &lowlvl_parts[3]; - - mtd_device_register(mymtd, partition_info, NUM_PARTITIONS); - - /* - ** now create a virtual MTD device by concatenating the for partitions - ** (in the sequence given by the lowlvl_parts[] array. - */ - merged_mtd = mtd_concat_create(lowlvl_parts, NUM_PARTITIONS, "(A)DNP Flash Concatenated"); - if(merged_mtd) - { /* - ** now partition the new device the way we want it. This time, - ** we do not supply mtd pointers in higlvl_partition_info, so - ** add_mtd_partitions() will register the devices. - */ - mtd_device_register(merged_mtd, higlvl_partition_info, - NUM_HIGHLVL_PARTITIONS); - } - - return 0; -} - -static void __exit cleanup_dnpc(void) -{ - if(merged_mtd) { - mtd_device_unregister(merged_mtd); - mtd_concat_destroy(merged_mtd); - } - - if (mymtd) { - mtd_device_unregister(mymtd); - map_destroy(mymtd); - } - if (dnpc_map.virt) { - iounmap(dnpc_map.virt); - dnpc_unmap_flash(); - dnpc_map.virt = NULL; - } -} - -module_init(init_dnpc); -module_exit(cleanup_dnpc); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Sysgo Real-Time Solutions GmbH"); -MODULE_DESCRIPTION("MTD map driver for SSV DIL/NetPC DNP & ADNP"); |
