76a5027c37
Updated version of patch, in response to comments from Francois Romieu <romieu@fr.zoreil.com> Remove gratuitous casts from iounmap and initialisation of variables. Signed-off-by: Amol Lad <amol@verismonetworks.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
283 lines
8.9 KiB
C
283 lines
8.9 KiB
C
/*
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* $Id: cstm_mips_ixx.c,v 1.14 2005/11/07 11:14:26 gleixner Exp $
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*
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* Mapping of a custom board with both AMD CFI and JEDEC flash in partitions.
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* Config with both CFI and JEDEC device support.
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*
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* Basically physmap.c with the addition of partitions and
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* an array of mapping info to accomodate more than one flash type per board.
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*
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* Copyright 2000 MontaVista Software Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <asm/io.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/map.h>
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#include <linux/mtd/partitions.h>
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#include <linux/delay.h>
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#if defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR)
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#define CC_GCR 0xB4013818
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#define CC_GPBCR 0xB401380A
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#define CC_GPBDR 0xB4013808
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#define CC_M68K_DEVICE 1
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#define CC_M68K_FUNCTION 6
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#define CC_CONFADDR 0xB8004000
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#define CC_CONFDATA 0xB8004004
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#define CC_FC_FCR 0xB8002004
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#define CC_FC_DCR 0xB8002008
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#define CC_GPACR 0xB4013802
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#define CC_GPAICR 0xB4013804
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#endif /* defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR) */
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#if defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR)
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void cstm_mips_ixx_set_vpp(struct map_info *map,int vpp)
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{
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static DEFINE_SPINLOCK(vpp_lock);
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static int vpp_count = 0;
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unsigned long flags;
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spin_lock_irqsave(&vpp_lock, flags);
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if (vpp) {
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if (!vpp_count++) {
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__u16 data;
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__u8 data1;
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static u8 first = 1;
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// Set GPIO port B pin3 to high
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data = *(__u16 *)(CC_GPBCR);
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data = (data & 0xff0f) | 0x0040;
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*(__u16 *)CC_GPBCR = data;
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*(__u8 *)CC_GPBDR = (*(__u8*)CC_GPBDR) | 0x08;
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if (first) {
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first = 0;
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/* need to have this delay for first
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enabling vpp after powerup */
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udelay(40);
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}
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}
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} else {
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if (!--vpp_count) {
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__u16 data;
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// Set GPIO port B pin3 to high
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data = *(__u16 *)(CC_GPBCR);
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data = (data & 0xff3f) | 0x0040;
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*(__u16 *)CC_GPBCR = data;
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*(__u8 *)CC_GPBDR = (*(__u8*)CC_GPBDR) & 0xf7;
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}
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}
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spin_unlock_irqrestore(&vpp_lock, flags);
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}
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#endif
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/* board and partition description */
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#define MAX_PHYSMAP_PARTITIONS 8
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struct cstm_mips_ixx_info {
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char *name;
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unsigned long window_addr;
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unsigned long window_size;
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int bankwidth;
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int num_partitions;
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};
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#if defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR)
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#define PHYSMAP_NUMBER 1 // number of board desc structs needed, one per contiguous flash type
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const struct cstm_mips_ixx_info cstm_mips_ixx_board_desc[PHYSMAP_NUMBER] =
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{
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{ // 28F128J3A in 2x16 configuration
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"big flash", // name
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0x08000000, // window_addr
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0x02000000, // window_size
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4, // bankwidth
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1, // num_partitions
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}
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};
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static struct mtd_partition cstm_mips_ixx_partitions[PHYSMAP_NUMBER][MAX_PHYSMAP_PARTITIONS] = {
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{ // 28F128J3A in 2x16 configuration
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{
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.name = "main partition ",
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.size = 0x02000000, // 128 x 2 x 128k byte sectors
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.offset = 0,
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},
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},
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};
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#else /* defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR) */
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#define PHYSMAP_NUMBER 1 // number of board desc structs needed, one per contiguous flash type
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const struct cstm_mips_ixx_info cstm_mips_ixx_board_desc[PHYSMAP_NUMBER] =
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{
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{
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"MTD flash", // name
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CONFIG_MTD_CSTM_MIPS_IXX_START, // window_addr
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CONFIG_MTD_CSTM_MIPS_IXX_LEN, // window_size
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CONFIG_MTD_CSTM_MIPS_IXX_BUSWIDTH, // bankwidth
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1, // num_partitions
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},
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};
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static struct mtd_partition cstm_mips_ixx_partitions[PHYSMAP_NUMBER][MAX_PHYSMAP_PARTITIONS] = {
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{
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{
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.name = "main partition",
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.size = CONFIG_MTD_CSTM_MIPS_IXX_LEN,
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.offset = 0,
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},
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},
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};
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#endif /* defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR) */
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struct map_info cstm_mips_ixx_map[PHYSMAP_NUMBER];
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int __init init_cstm_mips_ixx(void)
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{
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int i;
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int jedec;
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struct mtd_info *mymtd;
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struct mtd_partition *parts;
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/* Initialize mapping */
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for (i=0;i<PHYSMAP_NUMBER;i++) {
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printk(KERN_NOTICE "cstm_mips_ixx flash device: 0x%lx at 0x%lx\n",
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cstm_mips_ixx_board_desc[i].window_size, cstm_mips_ixx_board_desc[i].window_addr);
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cstm_mips_ixx_map[i].phys = cstm_mips_ixx_board_desc[i].window_addr;
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cstm_mips_ixx_map[i].virt = ioremap(cstm_mips_ixx_board_desc[i].window_addr, cstm_mips_ixx_board_desc[i].window_size);
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if (!cstm_mips_ixx_map[i].virt) {
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int j = 0;
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printk(KERN_WARNING "Failed to ioremap\n");
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for (j = 0; j < i; j++) {
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if (cstm_mips_ixx_map[j].virt) {
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iounmap(cstm_mips_ixx_map[j].virt);
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cstm_mips_ixx_map[j].virt = NULL;
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}
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}
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return -EIO;
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}
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cstm_mips_ixx_map[i].name = cstm_mips_ixx_board_desc[i].name;
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cstm_mips_ixx_map[i].size = cstm_mips_ixx_board_desc[i].window_size;
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cstm_mips_ixx_map[i].bankwidth = cstm_mips_ixx_board_desc[i].bankwidth;
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#if defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR)
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cstm_mips_ixx_map[i].set_vpp = cstm_mips_ixx_set_vpp;
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#endif
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simple_map_init(&cstm_mips_ixx_map[i]);
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//printk(KERN_NOTICE "cstm_mips_ixx: ioremap is %x\n",(unsigned int)(cstm_mips_ixx_map[i].virt));
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}
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#if defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR)
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setup_ITE_IVR_flash();
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#endif /* defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR) */
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for (i=0;i<PHYSMAP_NUMBER;i++) {
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parts = &cstm_mips_ixx_partitions[i][0];
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jedec = 0;
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mymtd = (struct mtd_info *)do_map_probe("cfi_probe", &cstm_mips_ixx_map[i]);
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//printk(KERN_NOTICE "phymap %d cfi_probe: mymtd is %x\n",i,(unsigned int)mymtd);
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if (!mymtd) {
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jedec = 1;
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mymtd = (struct mtd_info *)do_map_probe("jedec", &cstm_mips_ixx_map[i]);
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printk(KERN_NOTICE "cstm_mips_ixx %d jedec: mymtd is %x\n",i,(unsigned int)mymtd);
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}
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if (mymtd) {
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mymtd->owner = THIS_MODULE;
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cstm_mips_ixx_map[i].map_priv_2 = (unsigned long)mymtd;
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add_mtd_partitions(mymtd, parts, cstm_mips_ixx_board_desc[i].num_partitions);
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}
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else {
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for (i = 0; i < PHYSMAP_NUMBER; i++) {
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if (cstm_mips_ixx_map[i].virt) {
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iounmap(cstm_mips_ixx_map[i].virt);
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cstm_mips_ixx_map[i].virt = NULL;
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}
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}
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return -ENXIO;
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}
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}
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return 0;
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}
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static void __exit cleanup_cstm_mips_ixx(void)
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{
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int i;
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struct mtd_info *mymtd;
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for (i=0;i<PHYSMAP_NUMBER;i++) {
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mymtd = (struct mtd_info *)cstm_mips_ixx_map[i].map_priv_2;
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if (mymtd) {
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del_mtd_partitions(mymtd);
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map_destroy(mymtd);
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}
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if (cstm_mips_ixx_map[i].virt) {
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iounmap((void *)cstm_mips_ixx_map[i].virt);
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cstm_mips_ixx_map[i].virt = 0;
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}
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}
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}
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#if defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR)
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void PCISetULongByOffset(__u32 DevNumber, __u32 FuncNumber, __u32 Offset, __u32 data)
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{
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__u32 offset;
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offset = ( unsigned long )( 0x80000000 | ( DevNumber << 11 ) + ( FuncNumber << 8 ) + Offset) ;
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*(__u32 *)CC_CONFADDR = offset;
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*(__u32 *)CC_CONFDATA = data;
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}
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void setup_ITE_IVR_flash()
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{
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__u32 size, base;
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size = 0x0e000000; // 32MiB
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base = (0x08000000) >> 8 >>1; // Bug: we must shift one more bit
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/* need to set ITE flash to 32 bits instead of default 8 */
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#ifdef CONFIG_MIPS_IVR
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*(__u32 *)CC_FC_FCR = 0x55;
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*(__u32 *)CC_GPACR = 0xfffc;
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#else
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*(__u32 *)CC_FC_FCR = 0x77;
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#endif
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/* turn bursting off */
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*(__u32 *)CC_FC_DCR = 0x0;
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/* setup for one chip 4 byte PCI access */
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PCISetULongByOffset(CC_M68K_DEVICE, CC_M68K_FUNCTION, 0x60, size | base);
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PCISetULongByOffset(CC_M68K_DEVICE, CC_M68K_FUNCTION, 0x64, 0x02);
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}
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#endif /* defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR) */
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module_init(init_cstm_mips_ixx);
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module_exit(cleanup_cstm_mips_ixx);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Alice Hennessy <ahennessy@mvista.com>");
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MODULE_DESCRIPTION("MTD map driver for ITE 8172G and Globespan IVR boards");
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