Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 383 insertions, 0 deletions

diff --git a/drivers/mtd/maps/ichxrom.c b/drivers/mtd/maps/ichxrom.c
new file mode 100644
index 000000000000..29d1cc1bb426
--- /dev/null
+++ b/drivers/mtd/maps/ichxrom.c
@@ -0,0 +1,383 @@
+/*
+ * ichxrom.c
+ *
+ * Normal mappings of chips in physical memory
+ * $Id: ichxrom.c,v 1.16 2004/11/28 09:40:39 dwmw2 Exp $
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/init.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/config.h>
+#include <linux/pci.h>
+#include <linux/pci_ids.h>
+#include <linux/list.h>
+
+#define xstr(s) str(s)
+#define str(s) #s
+#define MOD_NAME xstr(KBUILD_BASENAME)
+
+#define ADDRESS_NAME_LEN 18
+
+#define ROM_PROBE_STEP_SIZE (64*1024) /* 64KiB */
+
+#define BIOS_CNTL       0x4e
+#define FWH_DEC_EN1     0xE3
+#define FWH_DEC_EN2     0xF0
+#define FWH_SEL1        0xE8
+#define FWH_SEL2        0xEE
+
+struct ichxrom_window {
+        void __iomem* virt;
+        unsigned long phys;
+        unsigned long size;
+        struct list_head maps;
+        struct resource rsrc;
+        struct pci_dev *pdev;
+};
+
+struct ichxrom_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 ichxrom_window ichxrom_window = {
+        .maps = LIST_HEAD_INIT(ichxrom_window.maps),
+};
+
+static void ichxrom_cleanup(struct ichxrom_window *window)
+{
+        struct ichxrom_map_info *map, *scratch;
+        u16 word;
+
+        /* Disable writes through the rom window */
+        pci_read_config_word(window->pdev, BIOS_CNTL, &word);
+        pci_write_config_word(window->pdev, BIOS_CNTL, word & ~1);
+
+        /* Free all of the mtd devices */
+        list_for_each_entry_safe(map, scratch, &window->maps, list) {
+                if (map->rsrc.parent)
+                        release_resource(&map->rsrc);
+                del_mtd_device(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;
+                window->pdev = NULL;
+        }
+}
+
+
+static int __devinit ichxrom_init_one (struct pci_dev *pdev,
+        const struct pci_device_id *ent)
+{
+        static char *rom_probe_types[] = { "cfi_probe", "jedec_probe", NULL };
+        struct ichxrom_window *window = &ichxrom_window;
+        struct ichxrom_map_info *map = NULL;
+        unsigned long map_top;
+        u8 byte;
+        u16 word;
+
+        /* For now I just handle the ichx 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 16MB 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 8MB window isn't enough 
+         * but don't currently handle that case either.
+         */
+        window->pdev = pdev;
+
+        /* Find a region continuous to the end of the ROM window  */
+        window->phys = 0;
+        pci_read_config_byte(pdev, FWH_DEC_EN1, &byte);
+        if (byte == 0xff) {
+                window->phys = 0xffc00000;
+                pci_read_config_byte(pdev, FWH_DEC_EN2, &byte);
+                if ((byte & 0x0f) == 0x0f) {
+                        window->phys = 0xff400000;
+                }
+                else if ((byte & 0x0e) == 0x0e) {
+                        window->phys = 0xff500000;
+                }
+                else if ((byte & 0x0c) == 0x0c) {
+                        window->phys = 0xff600000;
+                }
+                else if ((byte & 0x08) == 0x08) {
+                        window->phys = 0xff700000;
+                }
+        }
+        else if ((byte & 0xfe) == 0xfe) {
+                window->phys = 0xffc80000;
+        }
+        else if ((byte & 0xfc) == 0xfc) {
+                window->phys = 0xffd00000;
+        }
+        else if ((byte & 0xf8) == 0xf8) {
+                window->phys = 0xffd80000;
+        }
+        else if ((byte & 0xf0) == 0xf0) {
+                window->phys = 0xffe00000;
+        }
+        else if ((byte & 0xe0) == 0xe0) {
+                window->phys = 0xffe80000;
+        }
+        else if ((byte & 0xc0) == 0xc0) {
+                window->phys = 0xfff00000;
+        }
+        else if ((byte & 0x80) == 0x80) {
+                window->phys = 0xfff80000; 
+        }
+
+        if (window->phys == 0) {
+                printk(KERN_ERR MOD_NAME ": Rom window is closed\n");
+                goto out;
+        }
+        window->phys -= 0x400000UL;
+        window->size = (0xffffffffUL - window->phys) + 1UL;
+
+        /* Enable writes through the rom window */
+        pci_read_config_word(pdev, BIOS_CNTL, &word);
+        if (!(word & 1)  && (word & (1<<1))) {
+                /* 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_word(pdev, BIOS_CNTL, word | 1);
+
+        /*
+         * Try to reserve the window mem region.  If this fails then
+         * it is likely due to the window being "reseved" 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"
+                        " 0x%.08lx-0x%.08lx - kernel bug?\n",
+                        __func__,
+                        window->rsrc.start, window->rsrc.end);
+        }
+
+        /* Map the firmware hub into my address space. */
+        window->virt = ioremap_nocache(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) {
+                map_top = window->phys + 0x400000;
+        }
+#if 1
+        /* The probe sequence run over the firmware hub lock
+         * registers sets them to 0x7 (no access).
+         * 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, 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(%u) larger than window(%lu). fixing...\n",
+                                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 (add_mtd_device(map->mtd)) {
+                        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 */
+        if (map) {
+                kfree(map);
+        }
+        /* See if I have any map structures */
+        if (list_empty(&window->maps)) {
+                ichxrom_cleanup(window);
+                return -ENODEV;
+        }
+        return 0;
+}
+
+
+static void __devexit ichxrom_remove_one (struct pci_dev *pdev)
+{
+        struct ichxrom_window *window = &ichxrom_window;
+        ichxrom_cleanup(window);
+}
+
+static struct pci_device_id ichxrom_pci_tbl[] __devinitdata = {
+        { 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, },
+        { 0, },
+};
+
+MODULE_DEVICE_TABLE(pci, ichxrom_pci_tbl);
+
+#if 0
+static struct pci_driver ichxrom_driver = {
+        .name =         MOD_NAME,
+        .id_table =     ichxrom_pci_tbl,
+        .probe =        ichxrom_init_one,
+        .remove =       ichxrom_remove_one,
+};
+#endif
+
+static int __init init_ichxrom(void)
+{
+        struct pci_dev *pdev;
+        struct pci_device_id *id;
+
+        pdev = NULL;
+        for (id = ichxrom_pci_tbl; id->vendor; id++) {
+                pdev = pci_find_device(id->vendor, id->device, NULL);
+                if (pdev) {
+                        break;
+                }
+        }
+        if (pdev) {
+                return ichxrom_init_one(pdev, &ichxrom_pci_tbl[0]);
+        }
+        return -ENXIO;
+#if 0
+        return pci_module_init(&ichxrom_driver);
+#endif
+}
+
+static void __exit cleanup_ichxrom(void)
+{
+        ichxrom_remove_one(ichxrom_window.pdev);
+}
+
+module_init(init_ichxrom);
+module_exit(cleanup_ichxrom);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Eric Biederman <ebiederman@lnxi.com>");
+MODULE_DESCRIPTION("MTD map driver for BIOS chips on the ICHX southbridge");