| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Lew Glendenning | 1762 | 96.76% | 1 | 7.69% |
| Cyrill V. Gorcunov | 20 | 1.10% | 1 | 7.69% |
| Alan Cox | 13 | 0.71% | 1 | 7.69% |
| Andrew Morton | 6 | 0.33% | 1 | 7.69% |
| Jamie Iles | 6 | 0.33% | 1 | 7.69% |
| Joe Perches | 3 | 0.16% | 1 | 7.69% |
| Tejun Heo | 3 | 0.16% | 1 | 7.69% |
| Adrian Hunter | 2 | 0.11% | 1 | 7.69% |
| Arvind Yadav | 2 | 0.11% | 1 | 7.69% |
| Christoph Hellwig | 1 | 0.05% | 1 | 7.69% |
| Julia Lawall | 1 | 0.05% | 1 | 7.69% |
| Thomas Gleixner | 1 | 0.05% | 1 | 7.69% |
| Geert Uytterhoeven | 1 | 0.05% | 1 | 7.69% |
| Total | 1821 | 13 |
// SPDX-License-Identifier: GPL-2.0-only /* * esb2rom.c * * Normal mappings of flash chips in physical memory * through the Intel ESB2 Southbridge. * * This was derived from ichxrom.c in May 2006 by * Lew Glendenning <lglendenning@lnxi.com> * * Eric Biederman, of course, was a major help in this effort. */ #include <linux/module.h> #include <linux/types.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/slab.h> #include <asm/io.h> #include <linux/mtd/mtd.h> #include <linux/mtd/map.h> #include <linux/mtd/cfi.h> #include <linux/mtd/flashchip.h> #include <linux/pci.h> #include <linux/pci_ids.h> #include <linux/list.h> #define MOD_NAME KBUILD_BASENAME #define ADDRESS_NAME_LEN 18 #define ROM_PROBE_STEP_SIZE (64*1024) /* 64KiB */ #define BIOS_CNTL 0xDC #define BIOS_LOCK_ENABLE 0x02 #define BIOS_WRITE_ENABLE 0x01 /* This became a 16-bit register, and EN2 has disappeared */ #define FWH_DEC_EN1 0xD8 #define FWH_F8_EN 0x8000 #define FWH_F0_EN 0x4000 #define FWH_E8_EN 0x2000 #define FWH_E0_EN 0x1000 #define FWH_D8_EN 0x0800 #define FWH_D0_EN 0x0400 #define FWH_C8_EN 0x0200 #define FWH_C0_EN 0x0100 #define FWH_LEGACY_F_EN 0x0080 #define FWH_LEGACY_E_EN 0x0040 /* reserved 0x0020 and 0x0010 */ #define FWH_70_EN 0x0008 #define FWH_60_EN 0x0004 #define FWH_50_EN 0x0002 #define FWH_40_EN 0x0001 /* these are 32-bit values */ #define FWH_SEL1 0xD0 #define FWH_SEL2 0xD4 #define FWH_8MiB (FWH_F8_EN | FWH_F0_EN | FWH_E8_EN | FWH_E0_EN | \ FWH_D8_EN | FWH_D0_EN | FWH_C8_EN | FWH_C0_EN | \ FWH_70_EN | FWH_60_EN | FWH_50_EN | FWH_40_EN) #define FWH_7MiB (FWH_F8_EN | FWH_F0_EN | FWH_E8_EN | FWH_E0_EN | \ FWH_D8_EN | FWH_D0_EN | FWH_C8_EN | FWH_C0_EN | \ FWH_70_EN | FWH_60_EN | FWH_50_EN) #define FWH_6MiB (FWH_F8_EN | FWH_F0_EN | FWH_E8_EN | FWH_E0_EN | \ FWH_D8_EN | FWH_D0_EN | FWH_C8_EN | FWH_C0_EN | \ FWH_70_EN | FWH_60_EN) #define FWH_5MiB (FWH_F8_EN | FWH_F0_EN | FWH_E8_EN | FWH_E0_EN | \ FWH_D8_EN | FWH_D0_EN | FWH_C8_EN | FWH_C0_EN | \ FWH_70_EN) #define FWH_4MiB (FWH_F8_EN | FWH_F0_EN | FWH_E8_EN | FWH_E0_EN | \ FWH_D8_EN | FWH_D0_EN | FWH_C8_EN | FWH_C0_EN) #define FWH_3_5MiB (FWH_F8_EN | FWH_F0_EN | FWH_E8_EN | FWH_E0_EN | \ FWH_D8_EN | FWH_D0_EN | FWH_C8_EN) #define FWH_3MiB (FWH_F8_EN | FWH_F0_EN | FWH_E8_EN | FWH_E0_EN | \ FWH_D8_EN | FWH_D0_EN) #define FWH_2_5MiB (FWH_F8_EN | FWH_F0_EN | FWH_E8_EN | FWH_E0_EN | \ FWH_D8_EN) #define FWH_2MiB (FWH_F8_EN | FWH_F0_EN | FWH_E8_EN | FWH_E0_EN) #define FWH_1_5MiB (FWH_F8_EN | FWH_F0_EN | FWH_E8_EN) #define FWH_1MiB (FWH_F8_EN | FWH_F0_EN) #define FWH_0_5MiB (FWH_F8_EN) struct esb2rom_window { void __iomem* virt; unsigned long phys; unsigned long size; struct list_head maps; struct resource rsrc; struct pci_dev *pdev; }; struct esb2rom_map_info { struct list_head list; struct map_info map; struct mtd_info *mtd; struct resource rsrc; char map_name[sizeof(MOD_NAME) + 2 + ADDRESS_NAME_LEN]; }; static struct esb2rom_window esb2rom_window = { .maps = LIST_HEAD_INIT(esb2rom_window.maps), }; static void esb2rom_cleanup(struct esb2rom_window *window) { struct esb2rom_map_info *map, *scratch; u8 byte; /* Disable writes through the rom window */ pci_read_config_byte(window->pdev, BIOS_CNTL, &byte); pci_write_config_byte(window->pdev, BIOS_CNTL, byte & ~BIOS_WRITE_ENABLE); /* Free all of the mtd devices */ list_for_each_entry_safe(map, scratch, &window->maps, list) { if (map->rsrc.parent) release_resource(&map->rsrc); mtd_device_unregister(map->mtd); map_destroy(map->mtd); list_del(&map->list); kfree(map); } if (window->rsrc.parent) release_resource(&window->rsrc); if (window->virt) { iounmap(window->virt); window->virt = NULL; window->phys = 0; window->size = 0; } pci_dev_put(window->pdev); } static int __init esb2rom_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) { static char *rom_probe_types[] = { "cfi_probe", "jedec_probe", NULL }; struct esb2rom_window *window = &esb2rom_window; struct esb2rom_map_info *map = NULL; unsigned long map_top; u8 byte; u16 word; /* For now I just handle the ecb2 and I assume there * are not a lot of resources up at the top of the address * space. It is possible to handle other devices in the * top 16MiB but it is very painful. Also since * you can only really attach a FWH to an ICHX there * a number of simplifications you can make. * * Also you can page firmware hubs if an 8MiB window isn't enough * but don't currently handle that case either. */ window->pdev = pci_dev_get(pdev); /* RLG: experiment 2. Force the window registers to the widest values */ /* pci_read_config_word(pdev, FWH_DEC_EN1, &word); printk(KERN_DEBUG "Original FWH_DEC_EN1 : %x\n", word); pci_write_config_byte(pdev, FWH_DEC_EN1, 0xff); pci_read_config_byte(pdev, FWH_DEC_EN1, &byte); printk(KERN_DEBUG "New FWH_DEC_EN1 : %x\n", byte); pci_read_config_byte(pdev, FWH_DEC_EN2, &byte); printk(KERN_DEBUG "Original FWH_DEC_EN2 : %x\n", byte); pci_write_config_byte(pdev, FWH_DEC_EN2, 0x0f); pci_read_config_byte(pdev, FWH_DEC_EN2, &byte); printk(KERN_DEBUG "New FWH_DEC_EN2 : %x\n", byte); */ /* Find a region continuous to the end of the ROM window */ window->phys = 0; pci_read_config_word(pdev, FWH_DEC_EN1, &word); printk(KERN_DEBUG "pci_read_config_word : %x\n", word); if ((word & FWH_8MiB) == FWH_8MiB) window->phys = 0xff400000; else if ((word & FWH_7MiB) == FWH_7MiB) window->phys = 0xff500000; else if ((word & FWH_6MiB) == FWH_6MiB) window->phys = 0xff600000; else if ((word & FWH_5MiB) == FWH_5MiB) window->phys = 0xFF700000; else if ((word & FWH_4MiB) == FWH_4MiB) window->phys = 0xffc00000; else if ((word & FWH_3_5MiB) == FWH_3_5MiB) window->phys = 0xffc80000; else if ((word & FWH_3MiB) == FWH_3MiB) window->phys = 0xffd00000; else if ((word & FWH_2_5MiB) == FWH_2_5MiB) window->phys = 0xffd80000; else if ((word & FWH_2MiB) == FWH_2MiB) window->phys = 0xffe00000; else if ((word & FWH_1_5MiB) == FWH_1_5MiB) window->phys = 0xffe80000; else if ((word & FWH_1MiB) == FWH_1MiB) window->phys = 0xfff00000; else if ((word & FWH_0_5MiB) == FWH_0_5MiB) window->phys = 0xfff80000; if (window->phys == 0) { printk(KERN_ERR MOD_NAME ": Rom window is closed\n"); goto out; } /* reserved 0x0020 and 0x0010 */ window->phys -= 0x400000UL; window->size = (0xffffffffUL - window->phys) + 1UL; /* Enable writes through the rom window */ pci_read_config_byte(pdev, BIOS_CNTL, &byte); if (!(byte & BIOS_WRITE_ENABLE) && (byte & (BIOS_LOCK_ENABLE))) { /* The BIOS will generate an error if I enable * this device, so don't even try. */ printk(KERN_ERR MOD_NAME ": firmware access control, I can't enable writes\n"); goto out; } pci_write_config_byte(pdev, BIOS_CNTL, byte | BIOS_WRITE_ENABLE); /* * Try to reserve the window mem region. If this fails then * it is likely due to the window being "reserved" by the BIOS. */ window->rsrc.name = MOD_NAME; window->rsrc.start = window->phys; window->rsrc.end = window->phys + window->size - 1; window->rsrc.flags = IORESOURCE_MEM | IORESOURCE_BUSY; if (request_resource(&iomem_resource, &window->rsrc)) { window->rsrc.parent = NULL; printk(KERN_DEBUG MOD_NAME ": " "%s(): Unable to register resource %pR - kernel bug?\n", __func__, &window->rsrc); } /* Map the firmware hub into my address space. */ window->virt = ioremap(window->phys, window->size); if (!window->virt) { printk(KERN_ERR MOD_NAME ": ioremap(%08lx, %08lx) failed\n", window->phys, window->size); goto out; } /* Get the first address to look for an rom chip at */ map_top = window->phys; if ((window->phys & 0x3fffff) != 0) { /* if not aligned on 4MiB, look 4MiB lower in address space */ map_top = window->phys + 0x400000; } #if 1 /* The probe sequence run over the firmware hub lock * registers sets them to 0x7 (no access). * (Insane hardware design, but most copied Intel's.) * ==> Probe at most the last 4M of the address space. */ if (map_top < 0xffc00000) map_top = 0xffc00000; #endif /* Loop through and look for rom chips */ while ((map_top - 1) < 0xffffffffUL) { struct cfi_private *cfi; unsigned long offset; int i; if (!map) map = kmalloc(sizeof(*map), GFP_KERNEL); if (!map) { printk(KERN_ERR MOD_NAME ": kmalloc failed"); goto out; } memset(map, 0, sizeof(*map)); INIT_LIST_HEAD(&map->list); map->map.name = map->map_name; map->map.phys = map_top; offset = map_top - window->phys; map->map.virt = (void __iomem *) (((unsigned long)(window->virt)) + offset); map->map.size = 0xffffffffUL - map_top + 1UL; /* Set the name of the map to the address I am trying */ sprintf(map->map_name, "%s @%08Lx", MOD_NAME, (unsigned long long)map->map.phys); /* Firmware hubs only use vpp when being programmed * in a factory setting. So in-place programming * needs to use a different method. */ for(map->map.bankwidth = 32; map->map.bankwidth; map->map.bankwidth >>= 1) { char **probe_type; /* Skip bankwidths that are not supported */ if (!map_bankwidth_supported(map->map.bankwidth)) continue; /* Setup the map methods */ simple_map_init(&map->map); /* Try all of the probe methods */ probe_type = rom_probe_types; for(; *probe_type; probe_type++) { map->mtd = do_map_probe(*probe_type, &map->map); if (map->mtd) goto found; } } map_top += ROM_PROBE_STEP_SIZE; continue; found: /* Trim the size if we are larger than the map */ if (map->mtd->size > map->map.size) { printk(KERN_WARNING MOD_NAME " rom(%llu) larger than window(%lu). fixing...\n", (unsigned long long)map->mtd->size, map->map.size); map->mtd->size = map->map.size; } if (window->rsrc.parent) { /* * Registering the MTD device in iomem may not be possible * if there is a BIOS "reserved" and BUSY range. If this * fails then continue anyway. */ map->rsrc.name = map->map_name; map->rsrc.start = map->map.phys; map->rsrc.end = map->map.phys + map->mtd->size - 1; map->rsrc.flags = IORESOURCE_MEM | IORESOURCE_BUSY; if (request_resource(&window->rsrc, &map->rsrc)) { printk(KERN_ERR MOD_NAME ": cannot reserve MTD resource\n"); map->rsrc.parent = NULL; } } /* Make the whole region visible in the map */ map->map.virt = window->virt; map->map.phys = window->phys; cfi = map->map.fldrv_priv; for(i = 0; i < cfi->numchips; i++) cfi->chips[i].start += offset; /* Now that the mtd devices is complete claim and export it */ map->mtd->owner = THIS_MODULE; if (mtd_device_register(map->mtd, NULL, 0)) { map_destroy(map->mtd); map->mtd = NULL; goto out; } /* Calculate the new value of map_top */ map_top += map->mtd->size; /* File away the map structure */ list_add(&map->list, &window->maps); map = NULL; } out: /* Free any left over map structures */ kfree(map); /* See if I have any map structures */ if (list_empty(&window->maps)) { esb2rom_cleanup(window); return -ENODEV; } return 0; } static void esb2rom_remove_one(struct pci_dev *pdev) { struct esb2rom_window *window = &esb2rom_window; esb2rom_cleanup(window); } static const struct pci_device_id esb2rom_pci_tbl[] = { { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_0, PCI_ANY_ID, PCI_ANY_ID, }, { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_0, PCI_ANY_ID, PCI_ANY_ID, }, { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_0, PCI_ANY_ID, PCI_ANY_ID, }, { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_0, PCI_ANY_ID, PCI_ANY_ID, }, { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_1, PCI_ANY_ID, PCI_ANY_ID, }, { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB2_0, PCI_ANY_ID, PCI_ANY_ID, }, { 0, }, }; #if 0 MODULE_DEVICE_TABLE(pci, esb2rom_pci_tbl); static struct pci_driver esb2rom_driver = { .name = MOD_NAME, .id_table = esb2rom_pci_tbl, .probe = esb2rom_init_one, .remove = esb2rom_remove_one, }; #endif static int __init init_esb2rom(void) { struct pci_dev *pdev; const struct pci_device_id *id; int retVal; pdev = NULL; for (id = esb2rom_pci_tbl; id->vendor; id++) { printk(KERN_DEBUG "device id = %x\n", id->device); pdev = pci_get_device(id->vendor, id->device, NULL); if (pdev) { printk(KERN_DEBUG "matched device = %x\n", id->device); break; } } if (pdev) { printk(KERN_DEBUG "matched device id %x\n", id->device); retVal = esb2rom_init_one(pdev, &esb2rom_pci_tbl[0]); pci_dev_put(pdev); printk(KERN_DEBUG "retVal = %d\n", retVal); return retVal; } return -ENXIO; #if 0 return pci_register_driver(&esb2rom_driver); #endif } static void __exit cleanup_esb2rom(void) { esb2rom_remove_one(esb2rom_window.pdev); } module_init(init_esb2rom); module_exit(cleanup_esb2rom); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Lew Glendenning <lglendenning@lnxi.com>"); MODULE_DESCRIPTION("MTD map driver for BIOS chips on the ESB2 southbridge");
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