mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
459 lines
10 KiB
459 lines
10 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* EISA bus support functions for sysfs. |
|
* |
|
* (C) 2002, 2003 Marc Zyngier <[email protected]> |
|
*/ |
|
|
|
#include <linux/kernel.h> |
|
#include <linux/device.h> |
|
#include <linux/eisa.h> |
|
#include <linux/module.h> |
|
#include <linux/moduleparam.h> |
|
#include <linux/init.h> |
|
#include <linux/slab.h> |
|
#include <linux/ioport.h> |
|
#include <asm/io.h> |
|
|
|
#define SLOT_ADDRESS(r,n) (r->bus_base_addr + (0x1000 * n)) |
|
|
|
#define EISA_DEVINFO(i,s) { .id = { .sig = i }, .name = s } |
|
|
|
struct eisa_device_info { |
|
struct eisa_device_id id; |
|
char name[50]; |
|
}; |
|
|
|
#ifdef CONFIG_EISA_NAMES |
|
static struct eisa_device_info __initdata eisa_table[] = { |
|
#include "devlist.h" |
|
}; |
|
#define EISA_INFOS (sizeof (eisa_table) / (sizeof (struct eisa_device_info))) |
|
#endif |
|
|
|
#define EISA_MAX_FORCED_DEV 16 |
|
|
|
static int enable_dev[EISA_MAX_FORCED_DEV]; |
|
static unsigned int enable_dev_count; |
|
static int disable_dev[EISA_MAX_FORCED_DEV]; |
|
static unsigned int disable_dev_count; |
|
|
|
static int is_forced_dev(int *forced_tab, |
|
int forced_count, |
|
struct eisa_root_device *root, |
|
struct eisa_device *edev) |
|
{ |
|
int i, x; |
|
|
|
for (i = 0; i < forced_count; i++) { |
|
x = (root->bus_nr << 8) | edev->slot; |
|
if (forced_tab[i] == x) |
|
return 1; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static void __init eisa_name_device(struct eisa_device *edev) |
|
{ |
|
#ifdef CONFIG_EISA_NAMES |
|
int i; |
|
for (i = 0; i < EISA_INFOS; i++) { |
|
if (!strcmp(edev->id.sig, eisa_table[i].id.sig)) { |
|
strlcpy(edev->pretty_name, |
|
eisa_table[i].name, |
|
sizeof(edev->pretty_name)); |
|
return; |
|
} |
|
} |
|
|
|
/* No name was found */ |
|
sprintf(edev->pretty_name, "EISA device %.7s", edev->id.sig); |
|
#endif |
|
} |
|
|
|
static char __init *decode_eisa_sig(unsigned long addr) |
|
{ |
|
static char sig_str[EISA_SIG_LEN]; |
|
u8 sig[4]; |
|
u16 rev; |
|
int i; |
|
|
|
for (i = 0; i < 4; i++) { |
|
#ifdef CONFIG_EISA_VLB_PRIMING |
|
/* |
|
* This ugly stuff is used to wake up VL-bus cards |
|
* (AHA-284x is the only known example), so we can |
|
* read the EISA id. |
|
* |
|
* Thankfully, this only exists on x86... |
|
*/ |
|
outb(0x80 + i, addr); |
|
#endif |
|
sig[i] = inb(addr + i); |
|
|
|
if (!i && (sig[0] & 0x80)) |
|
return NULL; |
|
} |
|
|
|
sig_str[0] = ((sig[0] >> 2) & 0x1f) + ('A' - 1); |
|
sig_str[1] = (((sig[0] & 3) << 3) | (sig[1] >> 5)) + ('A' - 1); |
|
sig_str[2] = (sig[1] & 0x1f) + ('A' - 1); |
|
rev = (sig[2] << 8) | sig[3]; |
|
sprintf(sig_str + 3, "%04X", rev); |
|
|
|
return sig_str; |
|
} |
|
|
|
static int eisa_bus_match(struct device *dev, struct device_driver *drv) |
|
{ |
|
struct eisa_device *edev = to_eisa_device(dev); |
|
struct eisa_driver *edrv = to_eisa_driver(drv); |
|
const struct eisa_device_id *eids = edrv->id_table; |
|
|
|
if (!eids) |
|
return 0; |
|
|
|
while (strlen(eids->sig)) { |
|
if (!strcmp(eids->sig, edev->id.sig) && |
|
edev->state & EISA_CONFIG_ENABLED) { |
|
edev->id.driver_data = eids->driver_data; |
|
return 1; |
|
} |
|
|
|
eids++; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int eisa_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
|
{ |
|
struct eisa_device *edev = to_eisa_device(dev); |
|
|
|
add_uevent_var(env, "MODALIAS=" EISA_DEVICE_MODALIAS_FMT, edev->id.sig); |
|
return 0; |
|
} |
|
|
|
struct bus_type eisa_bus_type = { |
|
.name = "eisa", |
|
.match = eisa_bus_match, |
|
.uevent = eisa_bus_uevent, |
|
}; |
|
EXPORT_SYMBOL(eisa_bus_type); |
|
|
|
int eisa_driver_register(struct eisa_driver *edrv) |
|
{ |
|
edrv->driver.bus = &eisa_bus_type; |
|
return driver_register(&edrv->driver); |
|
} |
|
EXPORT_SYMBOL(eisa_driver_register); |
|
|
|
void eisa_driver_unregister(struct eisa_driver *edrv) |
|
{ |
|
driver_unregister(&edrv->driver); |
|
} |
|
EXPORT_SYMBOL(eisa_driver_unregister); |
|
|
|
static ssize_t eisa_show_sig(struct device *dev, struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct eisa_device *edev = to_eisa_device(dev); |
|
return sprintf(buf, "%s\n", edev->id.sig); |
|
} |
|
|
|
static DEVICE_ATTR(signature, S_IRUGO, eisa_show_sig, NULL); |
|
|
|
static ssize_t eisa_show_state(struct device *dev, |
|
struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct eisa_device *edev = to_eisa_device(dev); |
|
return sprintf(buf, "%d\n", edev->state & EISA_CONFIG_ENABLED); |
|
} |
|
|
|
static DEVICE_ATTR(enabled, S_IRUGO, eisa_show_state, NULL); |
|
|
|
static ssize_t eisa_show_modalias(struct device *dev, |
|
struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct eisa_device *edev = to_eisa_device(dev); |
|
return sprintf(buf, EISA_DEVICE_MODALIAS_FMT "\n", edev->id.sig); |
|
} |
|
|
|
static DEVICE_ATTR(modalias, S_IRUGO, eisa_show_modalias, NULL); |
|
|
|
static int __init eisa_init_device(struct eisa_root_device *root, |
|
struct eisa_device *edev, |
|
int slot) |
|
{ |
|
char *sig; |
|
unsigned long sig_addr; |
|
int i; |
|
|
|
sig_addr = SLOT_ADDRESS(root, slot) + EISA_VENDOR_ID_OFFSET; |
|
|
|
sig = decode_eisa_sig(sig_addr); |
|
if (!sig) |
|
return -1; /* No EISA device here */ |
|
|
|
memcpy(edev->id.sig, sig, EISA_SIG_LEN); |
|
edev->slot = slot; |
|
edev->state = inb(SLOT_ADDRESS(root, slot) + EISA_CONFIG_OFFSET) |
|
& EISA_CONFIG_ENABLED; |
|
edev->base_addr = SLOT_ADDRESS(root, slot); |
|
edev->dma_mask = root->dma_mask; /* Default DMA mask */ |
|
eisa_name_device(edev); |
|
edev->dev.parent = root->dev; |
|
edev->dev.bus = &eisa_bus_type; |
|
edev->dev.dma_mask = &edev->dma_mask; |
|
edev->dev.coherent_dma_mask = edev->dma_mask; |
|
dev_set_name(&edev->dev, "%02X:%02X", root->bus_nr, slot); |
|
|
|
for (i = 0; i < EISA_MAX_RESOURCES; i++) { |
|
#ifdef CONFIG_EISA_NAMES |
|
edev->res[i].name = edev->pretty_name; |
|
#else |
|
edev->res[i].name = edev->id.sig; |
|
#endif |
|
} |
|
|
|
if (is_forced_dev(enable_dev, enable_dev_count, root, edev)) |
|
edev->state = EISA_CONFIG_ENABLED | EISA_CONFIG_FORCED; |
|
|
|
if (is_forced_dev(disable_dev, disable_dev_count, root, edev)) |
|
edev->state = EISA_CONFIG_FORCED; |
|
|
|
return 0; |
|
} |
|
|
|
static int __init eisa_register_device(struct eisa_device *edev) |
|
{ |
|
int rc = device_register(&edev->dev); |
|
if (rc) { |
|
put_device(&edev->dev); |
|
return rc; |
|
} |
|
|
|
rc = device_create_file(&edev->dev, &dev_attr_signature); |
|
if (rc) |
|
goto err_devreg; |
|
rc = device_create_file(&edev->dev, &dev_attr_enabled); |
|
if (rc) |
|
goto err_sig; |
|
rc = device_create_file(&edev->dev, &dev_attr_modalias); |
|
if (rc) |
|
goto err_enab; |
|
|
|
return 0; |
|
|
|
err_enab: |
|
device_remove_file(&edev->dev, &dev_attr_enabled); |
|
err_sig: |
|
device_remove_file(&edev->dev, &dev_attr_signature); |
|
err_devreg: |
|
device_unregister(&edev->dev); |
|
return rc; |
|
} |
|
|
|
static int __init eisa_request_resources(struct eisa_root_device *root, |
|
struct eisa_device *edev, |
|
int slot) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < EISA_MAX_RESOURCES; i++) { |
|
/* Don't register resource for slot 0, since this is |
|
* very likely to fail... :-( Instead, grab the EISA |
|
* id, now we can display something in /proc/ioports. |
|
*/ |
|
|
|
/* Only one region for mainboard */ |
|
if (!slot && i > 0) { |
|
edev->res[i].start = edev->res[i].end = 0; |
|
continue; |
|
} |
|
|
|
if (slot) { |
|
edev->res[i].name = NULL; |
|
edev->res[i].start = SLOT_ADDRESS(root, slot) |
|
+ (i * 0x400); |
|
edev->res[i].end = edev->res[i].start + 0xff; |
|
edev->res[i].flags = IORESOURCE_IO; |
|
} else { |
|
edev->res[i].name = NULL; |
|
edev->res[i].start = SLOT_ADDRESS(root, slot) |
|
+ EISA_VENDOR_ID_OFFSET; |
|
edev->res[i].end = edev->res[i].start + 3; |
|
edev->res[i].flags = IORESOURCE_IO | IORESOURCE_BUSY; |
|
} |
|
|
|
if (request_resource(root->res, &edev->res[i])) |
|
goto failed; |
|
} |
|
|
|
return 0; |
|
|
|
failed: |
|
while (--i >= 0) |
|
release_resource(&edev->res[i]); |
|
|
|
return -1; |
|
} |
|
|
|
static void __init eisa_release_resources(struct eisa_device *edev) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < EISA_MAX_RESOURCES; i++) |
|
if (edev->res[i].start || edev->res[i].end) |
|
release_resource(&edev->res[i]); |
|
} |
|
|
|
static int __init eisa_probe(struct eisa_root_device *root) |
|
{ |
|
int i, c; |
|
struct eisa_device *edev; |
|
char *enabled_str; |
|
|
|
dev_info(root->dev, "Probing EISA bus %d\n", root->bus_nr); |
|
|
|
/* First try to get hold of slot 0. If there is no device |
|
* here, simply fail, unless root->force_probe is set. */ |
|
|
|
edev = kzalloc(sizeof(*edev), GFP_KERNEL); |
|
if (!edev) |
|
return -ENOMEM; |
|
|
|
if (eisa_request_resources(root, edev, 0)) { |
|
dev_warn(root->dev, |
|
"EISA: Cannot allocate resource for mainboard\n"); |
|
kfree(edev); |
|
if (!root->force_probe) |
|
return -EBUSY; |
|
goto force_probe; |
|
} |
|
|
|
if (eisa_init_device(root, edev, 0)) { |
|
eisa_release_resources(edev); |
|
kfree(edev); |
|
if (!root->force_probe) |
|
return -ENODEV; |
|
goto force_probe; |
|
} |
|
|
|
dev_info(&edev->dev, "EISA: Mainboard %s detected\n", edev->id.sig); |
|
|
|
if (eisa_register_device(edev)) { |
|
dev_err(&edev->dev, "EISA: Failed to register %s\n", |
|
edev->id.sig); |
|
eisa_release_resources(edev); |
|
kfree(edev); |
|
} |
|
|
|
force_probe: |
|
|
|
for (c = 0, i = 1; i <= root->slots; i++) { |
|
edev = kzalloc(sizeof(*edev), GFP_KERNEL); |
|
if (!edev) { |
|
dev_err(root->dev, "EISA: Out of memory for slot %d\n", |
|
i); |
|
continue; |
|
} |
|
|
|
if (eisa_request_resources(root, edev, i)) { |
|
dev_warn(root->dev, |
|
"Cannot allocate resource for EISA slot %d\n", |
|
i); |
|
kfree(edev); |
|
continue; |
|
} |
|
|
|
if (eisa_init_device(root, edev, i)) { |
|
eisa_release_resources(edev); |
|
kfree(edev); |
|
continue; |
|
} |
|
|
|
if (edev->state == (EISA_CONFIG_ENABLED | EISA_CONFIG_FORCED)) |
|
enabled_str = " (forced enabled)"; |
|
else if (edev->state == EISA_CONFIG_FORCED) |
|
enabled_str = " (forced disabled)"; |
|
else if (edev->state == 0) |
|
enabled_str = " (disabled)"; |
|
else |
|
enabled_str = ""; |
|
|
|
dev_info(&edev->dev, "EISA: slot %d: %s detected%s\n", i, |
|
edev->id.sig, enabled_str); |
|
|
|
c++; |
|
|
|
if (eisa_register_device(edev)) { |
|
dev_err(&edev->dev, "EISA: Failed to register %s\n", |
|
edev->id.sig); |
|
eisa_release_resources(edev); |
|
kfree(edev); |
|
} |
|
} |
|
|
|
dev_info(root->dev, "EISA: Detected %d card%s\n", c, c == 1 ? "" : "s"); |
|
return 0; |
|
} |
|
|
|
static struct resource eisa_root_res = { |
|
.name = "EISA root resource", |
|
.start = 0, |
|
.end = 0xffffffff, |
|
.flags = IORESOURCE_IO, |
|
}; |
|
|
|
static int eisa_bus_count; |
|
|
|
int __init eisa_root_register(struct eisa_root_device *root) |
|
{ |
|
int err; |
|
|
|
/* Use our own resources to check if this bus base address has |
|
* been already registered. This prevents the virtual root |
|
* device from registering after the real one has, for |
|
* example... */ |
|
|
|
root->eisa_root_res.name = eisa_root_res.name; |
|
root->eisa_root_res.start = root->res->start; |
|
root->eisa_root_res.end = root->res->end; |
|
root->eisa_root_res.flags = IORESOURCE_BUSY; |
|
|
|
err = request_resource(&eisa_root_res, &root->eisa_root_res); |
|
if (err) |
|
return err; |
|
|
|
root->bus_nr = eisa_bus_count++; |
|
|
|
err = eisa_probe(root); |
|
if (err) |
|
release_resource(&root->eisa_root_res); |
|
|
|
return err; |
|
} |
|
|
|
static int __init eisa_init(void) |
|
{ |
|
int r; |
|
|
|
r = bus_register(&eisa_bus_type); |
|
if (r) |
|
return r; |
|
|
|
printk(KERN_INFO "EISA bus registered\n"); |
|
return 0; |
|
} |
|
|
|
module_param_array(enable_dev, int, &enable_dev_count, 0444); |
|
module_param_array(disable_dev, int, &disable_dev_count, 0444); |
|
|
|
postcore_initcall(eisa_init); |
|
|
|
int EISA_bus; /* for legacy drivers */ |
|
EXPORT_SYMBOL(EISA_bus);
|
|
|