LinuxPPC-Dev Archive on lore.kernel.org

* [PATCH 09/10] mtd: remove the dilnetpc map driver support
From: Artem Bityutskiy @ 2013-03-13  9:05 UTC (permalink / raw)
  To: MTD Maling List, linuxppc-dev
In-Reply-To: <1363086855-2847-1-git-send-email-dedekind1@gmail.com>

From: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>

This driver is marked as broken for very long time. Most probably this board is
just something ancient no one cares about anyway.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
---

Adding the PPC list

 drivers/mtd/maps/Kconfig    |   16 --
 drivers/mtd/maps/Makefile   |    1 -
 drivers/mtd/maps/dilnetpc.c |  496 -------------------------------------------
 3 files changed, 513 deletions(-)
 delete mode 100644 drivers/mtd/maps/dilnetpc.c

diff --git a/drivers/mtd/maps/Kconfig b/drivers/mtd/maps/Kconfig
index 888e684..b6a369a 100644
--- a/drivers/mtd/maps/Kconfig
+++ b/drivers/mtd/maps/Kconfig
@@ -249,22 +249,6 @@ config MTD_LANTIQ
 	help
 	  Support for NOR flash attached to the Lantiq SoC's External Bus Unit.
 
-config MTD_DILNETPC
-	tristate "CFI Flash device mapped on DIL/Net PC"
-	depends on X86 && MTD_CFI_INTELEXT && BROKEN
-	help
-	  MTD map driver for SSV DIL/Net PC Boards "DNP" and "ADNP".
-	  For details, see <http://www.ssv-embedded.de/ssv/pc104/p169.htm>
- 	  and <http://www.ssv-embedded.de/ssv/pc104/p170.htm>
-
-config MTD_DILNETPC_BOOTSIZE
-	hex "Size of DIL/Net PC flash boot partition"
-	depends on MTD_DILNETPC
-	default "0x80000"
-	help
-	  The amount of space taken up by the kernel or Etherboot
-	  on the DIL/Net PC flash chips.
-
 config MTD_L440GX
 	tristate "BIOS flash chip on Intel L440GX boards"
 	depends on X86 && MTD_JEDECPROBE
diff --git a/drivers/mtd/maps/Makefile b/drivers/mtd/maps/Makefile
index 0cdc881..7315ed8 100644
--- a/drivers/mtd/maps/Makefile
+++ b/drivers/mtd/maps/Makefile
@@ -9,7 +9,6 @@ endif
 # Chip mappings
 obj-$(CONFIG_MTD_CFI_FLAGADM)	+= cfi_flagadm.o
 obj-$(CONFIG_MTD_DC21285)	+= dc21285.o
-obj-$(CONFIG_MTD_DILNETPC)	+= dilnetpc.o
 obj-$(CONFIG_MTD_L440GX)	+= l440gx.o
 obj-$(CONFIG_MTD_AMD76XROM)	+= amd76xrom.o
 obj-$(CONFIG_MTD_ESB2ROM)	+= esb2rom.o
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");
-- 
1.7.10.4


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-- 
Best Regards,
Artem Bityutskiy

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