^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /* linux/drivers/mtd/maps/scx200_docflash.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) Copyright (c) 2001,2002 Christer Weinigel <wingel@nano-system.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) National Semiconductor SCx200 flash mapped with DOCCS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <asm/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/mtd/mtd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/mtd/map.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/mtd/partitions.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/pci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/scx200.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define NAME "scx200_docflash"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) MODULE_AUTHOR("Christer Weinigel <wingel@hack.org>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) MODULE_DESCRIPTION("NatSemi SCx200 DOCCS Flash Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) static int probe = 0; /* Don't autoprobe */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) static unsigned size = 0x1000000; /* 16 MiB the whole ISA address space */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static unsigned width = 8; /* Default to 8 bits wide */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static char *flashtype = "cfi_probe";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) module_param(probe, int, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) MODULE_PARM_DESC(probe, "Probe for a BIOS mapping");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) module_param(size, int, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) MODULE_PARM_DESC(size, "Size of the flash mapping");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) module_param(width, int, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) MODULE_PARM_DESC(width, "Data width of the flash mapping (8/16)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) module_param(flashtype, charp, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) MODULE_PARM_DESC(flashtype, "Type of MTD probe to do");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) static struct resource docmem = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) .flags = IORESOURCE_MEM,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) .name = "NatSemi SCx200 DOCCS Flash",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) static struct mtd_info *mymtd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) static struct mtd_partition partition_info[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) .name = "DOCCS Boot kernel",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) .offset = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) .size = 0xc0000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) .name = "DOCCS Low BIOS",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) .offset = 0xc0000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) .size = 0x40000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) .name = "DOCCS File system",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) .offset = 0x100000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) .size = ~0 /* calculate from flash size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) .name = "DOCCS High BIOS",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) .offset = ~0, /* calculate from flash size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) .size = 0x80000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) #define NUM_PARTITIONS ARRAY_SIZE(partition_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) static struct map_info scx200_docflash_map = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) .name = "NatSemi SCx200 DOCCS Flash",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) static int __init init_scx200_docflash(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) unsigned u;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) unsigned base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) unsigned ctrl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) unsigned pmr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) struct pci_dev *bridge;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) printk(KERN_DEBUG NAME ": NatSemi SCx200 DOCCS Flash Driver\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) if ((bridge = pci_get_device(PCI_VENDOR_ID_NS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) PCI_DEVICE_ID_NS_SCx200_BRIDGE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) NULL)) == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) /* check that we have found the configuration block */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) if (!scx200_cb_present()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) pci_dev_put(bridge);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) if (probe) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) /* Try to use the present flash mapping if any */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) pci_read_config_dword(bridge, SCx200_DOCCS_BASE, &base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) pci_read_config_dword(bridge, SCx200_DOCCS_CTRL, &ctrl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) pci_dev_put(bridge);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) pmr = inl(scx200_cb_base + SCx200_PMR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (base == 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) || (ctrl & 0x07000000) != 0x07000000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) || (ctrl & 0x0007ffff) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) size = ((ctrl&0x1fff)<<13) + (1<<13);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) for (u = size; u > 1; u >>= 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) if (u != 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) if (pmr & (1<<6))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) width = 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) width = 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) docmem.start = base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) docmem.end = base + size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) if (request_resource(&iomem_resource, &docmem)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) printk(KERN_ERR NAME ": unable to allocate memory for flash mapping\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) pci_dev_put(bridge);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) for (u = size; u > 1; u >>= 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) if (u != 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) printk(KERN_ERR NAME ": invalid size for flash mapping\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if (width != 8 && width != 16) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) printk(KERN_ERR NAME ": invalid bus width for flash mapping\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) if (allocate_resource(&iomem_resource, &docmem,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 0xc0000000, 0xffffffff,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) size, NULL, NULL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) printk(KERN_ERR NAME ": unable to allocate memory for flash mapping\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) ctrl = 0x07000000 | ((size-1) >> 13);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) printk(KERN_INFO "DOCCS BASE=0x%08lx, CTRL=0x%08lx\n", (long)docmem.start, (long)ctrl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) pci_write_config_dword(bridge, SCx200_DOCCS_BASE, docmem.start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) pci_write_config_dword(bridge, SCx200_DOCCS_CTRL, ctrl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) pmr = inl(scx200_cb_base + SCx200_PMR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) if (width == 8) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) pmr &= ~(1<<6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) pmr |= (1<<6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) outl(pmr, scx200_cb_base + SCx200_PMR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) printk(KERN_INFO NAME ": DOCCS mapped at %pR, width %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) &docmem, width);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) scx200_docflash_map.size = size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) if (width == 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) scx200_docflash_map.bankwidth = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) scx200_docflash_map.bankwidth = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) simple_map_init(&scx200_docflash_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) scx200_docflash_map.phys = docmem.start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) scx200_docflash_map.virt = ioremap(docmem.start, scx200_docflash_map.size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) if (!scx200_docflash_map.virt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) printk(KERN_ERR NAME ": failed to ioremap the flash\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) release_resource(&docmem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) mymtd = do_map_probe(flashtype, &scx200_docflash_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) if (!mymtd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) printk(KERN_ERR NAME ": unable to detect flash\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) iounmap(scx200_docflash_map.virt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) release_resource(&docmem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) if (size < mymtd->size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) printk(KERN_WARNING NAME ": warning, flash mapping is smaller than flash size\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) mymtd->owner = THIS_MODULE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) partition_info[3].offset = mymtd->size-partition_info[3].size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) partition_info[2].size = partition_info[3].offset-partition_info[2].offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) mtd_device_register(mymtd, partition_info, NUM_PARTITIONS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) static void __exit cleanup_scx200_docflash(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) if (mymtd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) mtd_device_unregister(mymtd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) map_destroy(mymtd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) if (scx200_docflash_map.virt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) iounmap(scx200_docflash_map.virt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) release_resource(&docmem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) module_init(init_scx200_docflash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) module_exit(cleanup_scx200_docflash);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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