Staging: sep: Move the RAR support into staging where it is supposed to be
Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Cox
Greg Kroah-Hartman
parent
cd1bb431d8
commit
542385ee6d
|
|
@ -135,6 +135,8 @@ source "drivers/staging/hv/Kconfig"
|
|||
|
||||
source "drivers/staging/vme/Kconfig"
|
||||
|
||||
source "drivers/staging/rar/Kconfig"
|
||||
|
||||
source "drivers/staging/sep/Kconfig"
|
||||
|
||||
endif # !STAGING_EXCLUDE_BUILD
|
||||
|
|
|
|||
|
|
@ -49,4 +49,5 @@ obj-$(CONFIG_USB_CPC) += cpc-usb/
|
|||
obj-$(CONFIG_FB_UDL) += udlfb/
|
||||
obj-$(CONFIG_HYPERV) += hv/
|
||||
obj-$(CONFIG_VME_BUS) += vme/
|
||||
obj-$(CONFIG_RAR_REGISTER) += rar/
|
||||
obj-$(CONFIG_DX_SEP) += sep/
|
||||
|
|
|
|||
|
|
@ -0,0 +1,17 @@
|
|||
#
|
||||
# RAR device configuration
|
||||
#
|
||||
|
||||
menu "RAR Register Driver"
|
||||
#
|
||||
# Restricted Access Register Manager
|
||||
#
|
||||
config RAR_REGISTER
|
||||
tristate "Restricted Access Region Register Driver"
|
||||
default n
|
||||
---help---
|
||||
This driver allows other kernel drivers access to the
|
||||
contents of the restricted access region control
|
||||
registers.
|
||||
|
||||
endmenu
|
||||
|
|
@ -0,0 +1,2 @@
|
|||
EXTRA_CFLAGS += -DLITTLE__ENDIAN
|
||||
obj-$(CONFIG_RAR_REGISTER) += rar_driver.o
|
||||
|
|
@ -0,0 +1,450 @@
|
|||
#include <linux/init.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/fs.h>
|
||||
#include <linux/cdev.h>
|
||||
#include <linux/kdev_t.h>
|
||||
#include <linux/semaphore.h>
|
||||
#include <linux/mm.h>
|
||||
#include <linux/poll.h>
|
||||
#include <linux/wait.h>
|
||||
#include <linux/ioctl.h>
|
||||
#include <linux/ioport.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/pagemap.h>
|
||||
#include <linux/pci.h>
|
||||
#include <linux/firmware.h>
|
||||
#include <linux/sched.h>
|
||||
#include "rar_driver.h"
|
||||
|
||||
/* PCI vendor id for controler */
|
||||
#define VENDOR_ID 0x8086
|
||||
|
||||
/* PCI device id for controler */
|
||||
#define DEVICE_ID 0x4110
|
||||
|
||||
/* The following defines are for the IPC process to retrieve RAR in */
|
||||
|
||||
/* === Lincroft Message Bus Interface === */
|
||||
/* Message Control Register */
|
||||
#define LNC_MCR_OFFSET 0xD0
|
||||
|
||||
/* Message Data Register */
|
||||
#define LNC_MDR_OFFSET 0xD4
|
||||
|
||||
/* Message Opcodes */
|
||||
#define LNC_MESSAGE_READ_OPCODE 0xD0
|
||||
#define LNC_MESSAGE_WRITE_OPCODE 0xE0
|
||||
|
||||
/* Message Write Byte Enables */
|
||||
#define LNC_MESSAGE_BYTE_WRITE_ENABLES 0xF
|
||||
|
||||
/* B-unit Port */
|
||||
#define LNC_BUNIT_PORT 0x3
|
||||
|
||||
/* === Lincroft B-Unit Registers - Programmed by IA32 firmware === */
|
||||
#define LNC_BRAR0L 0x10
|
||||
#define LNC_BRAR0H 0x11
|
||||
#define LNC_BRAR1L 0x12
|
||||
#define LNC_BRAR1H 0x13
|
||||
|
||||
/* Reserved for SeP */
|
||||
#define LNC_BRAR2L 0x14
|
||||
#define LNC_BRAR2H 0x15
|
||||
|
||||
|
||||
/* This structure is only used during module initialization. */
|
||||
struct RAR_offsets {
|
||||
int low; /* Register offset for low RAR physical address. */
|
||||
int high; /* Register offset for high RAR physical address. */
|
||||
};
|
||||
|
||||
struct pci_dev *rar_dev;
|
||||
static uint32_t registered;
|
||||
|
||||
/* Moorestown supports three restricted access regions. */
|
||||
#define MRST_NUM_RAR 3
|
||||
|
||||
struct RAR_address_struct rar_addr[MRST_NUM_RAR];
|
||||
|
||||
/* prototype for init */
|
||||
static int __init rar_init_handler(void);
|
||||
static void __exit rar_exit_handler(void);
|
||||
|
||||
/*
|
||||
function that is activated on the succesfull probe of the RAR device
|
||||
*/
|
||||
static int __devinit rar_probe(struct pci_dev *pdev, struct pci_device_id *ent);
|
||||
|
||||
static struct pci_device_id rar_pci_id_tbl[] = {
|
||||
{ PCI_DEVICE(VENDOR_ID, DEVICE_ID) },
|
||||
{ 0 }
|
||||
};
|
||||
|
||||
MODULE_DEVICE_TABLE(pci, rar_pci_id_tbl);
|
||||
|
||||
/* field for registering driver to PCI device */
|
||||
static struct pci_driver rar_pci_driver = {
|
||||
.name = "rar_driver",
|
||||
.id_table = rar_pci_id_tbl,
|
||||
.probe = rar_probe
|
||||
};
|
||||
|
||||
/* This function is used to retrieved RAR info using the IPC message
|
||||
bus interface */
|
||||
static int memrar_get_rar_addr(struct pci_dev* pdev,
|
||||
int offset,
|
||||
u32 *addr)
|
||||
{
|
||||
/*
|
||||
* ======== The Lincroft Message Bus Interface ========
|
||||
* Lincroft registers may be obtained from the PCI
|
||||
* (the Host Bridge) using the Lincroft Message Bus
|
||||
* Interface. That message bus interface is generally
|
||||
* comprised of two registers: a control register (MCR, 0xDO)
|
||||
* and a data register (MDR, 0xD4).
|
||||
*
|
||||
* The MCR (message control register) format is the following:
|
||||
* 1. [31:24]: Opcode
|
||||
* 2. [23:16]: Port
|
||||
* 3. [15:8]: Register Offset
|
||||
* 4. [7:4]: Byte Enables (use 0xF to set all of these bits
|
||||
* to 1)
|
||||
* 5. [3:0]: reserved
|
||||
*
|
||||
* Read (0xD0) and write (0xE0) opcodes are written to the
|
||||
* control register when reading and writing to Lincroft
|
||||
* registers, respectively.
|
||||
*
|
||||
* We're interested in registers found in the Lincroft
|
||||
* B-unit. The B-unit port is 0x3.
|
||||
*
|
||||
* The six B-unit RAR register offsets we use are listed
|
||||
* earlier in this file.
|
||||
*
|
||||
* Lastly writing to the MCR register requires the "Byte
|
||||
* enables" bits to be set to 1. This may be achieved by
|
||||
* writing 0xF at bit 4.
|
||||
*
|
||||
* The MDR (message data register) format is the following:
|
||||
* 1. [31:0]: Read/Write Data
|
||||
*
|
||||
* Data being read from this register is only available after
|
||||
* writing the appropriate control message to the MCR
|
||||
* register.
|
||||
*
|
||||
* Data being written to this register must be written before
|
||||
* writing the appropriate control message to the MCR
|
||||
* register.
|
||||
*/
|
||||
|
||||
int result = 0; /* result */
|
||||
/* Construct control message */
|
||||
u32 const message =
|
||||
(LNC_MESSAGE_READ_OPCODE << 24)
|
||||
| (LNC_BUNIT_PORT << 16)
|
||||
| (offset << 8)
|
||||
| (LNC_MESSAGE_BYTE_WRITE_ENABLES << 4);
|
||||
|
||||
printk(KERN_WARNING "rar- offset to LNC MSG is %x\n",offset);
|
||||
|
||||
if (addr == 0)
|
||||
return -EINVAL;
|
||||
|
||||
/* Send the control message */
|
||||
result = pci_write_config_dword(pdev,
|
||||
LNC_MCR_OFFSET,
|
||||
message);
|
||||
|
||||
printk(KERN_WARNING "rar- result from send ctl register is %x\n"
|
||||
,result);
|
||||
|
||||
if (!result)
|
||||
result = pci_read_config_dword(pdev,
|
||||
LNC_MDR_OFFSET,
|
||||
addr);
|
||||
|
||||
printk(KERN_WARNING "rar- result from read data register is %x\n",
|
||||
result);
|
||||
|
||||
printk(KERN_WARNING "rar- value read from data register is %x\n",
|
||||
*addr);
|
||||
|
||||
if (result)
|
||||
return -1;
|
||||
else
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int memrar_set_rar_addr(struct pci_dev* pdev,
|
||||
int offset,
|
||||
u32 addr)
|
||||
{
|
||||
/*
|
||||
* ======== The Lincroft Message Bus Interface ========
|
||||
* Lincroft registers may be obtained from the PCI
|
||||
* (the Host Bridge) using the Lincroft Message Bus
|
||||
* Interface. That message bus interface is generally
|
||||
* comprised of two registers: a control register (MCR, 0xDO)
|
||||
* and a data register (MDR, 0xD4).
|
||||
*
|
||||
* The MCR (message control register) format is the following:
|
||||
* 1. [31:24]: Opcode
|
||||
* 2. [23:16]: Port
|
||||
* 3. [15:8]: Register Offset
|
||||
* 4. [7:4]: Byte Enables (use 0xF to set all of these bits
|
||||
* to 1)
|
||||
* 5. [3:0]: reserved
|
||||
*
|
||||
* Read (0xD0) and write (0xE0) opcodes are written to the
|
||||
* control register when reading and writing to Lincroft
|
||||
* registers, respectively.
|
||||
*
|
||||
* We're interested in registers found in the Lincroft
|
||||
* B-unit. The B-unit port is 0x3.
|
||||
*
|
||||
* The six B-unit RAR register offsets we use are listed
|
||||
* earlier in this file.
|
||||
*
|
||||
* Lastly writing to the MCR register requires the "Byte
|
||||
* enables" bits to be set to 1. This may be achieved by
|
||||
* writing 0xF at bit 4.
|
||||
*
|
||||
* The MDR (message data register) format is the following:
|
||||
* 1. [31:0]: Read/Write Data
|
||||
*
|
||||
* Data being read from this register is only available after
|
||||
* writing the appropriate control message to the MCR
|
||||
* register.
|
||||
*
|
||||
* Data being written to this register must be written before
|
||||
* writing the appropriate control message to the MCR
|
||||
* register.
|
||||
*/
|
||||
|
||||
int result = 0; /* result */
|
||||
|
||||
/* Construct control message */
|
||||
u32 const message =
|
||||
(LNC_MESSAGE_WRITE_OPCODE << 24)
|
||||
| (LNC_BUNIT_PORT << 16)
|
||||
| (offset << 8)
|
||||
| (LNC_MESSAGE_BYTE_WRITE_ENABLES << 4);
|
||||
|
||||
printk(KERN_WARNING "rar- offset to LNC MSG is %x\n",offset);
|
||||
|
||||
if (addr == 0)
|
||||
return -EINVAL;
|
||||
|
||||
/* Send the control message */
|
||||
result = pci_write_config_dword(pdev,
|
||||
LNC_MDR_OFFSET,
|
||||
addr);
|
||||
|
||||
printk(KERN_WARNING "rar- result from send ctl register is %x\n"
|
||||
,result);
|
||||
|
||||
if (!result)
|
||||
result = pci_write_config_dword(pdev,
|
||||
LNC_MCR_OFFSET,
|
||||
message);
|
||||
|
||||
printk(KERN_WARNING "rar- result from write data register is %x\n",
|
||||
result);
|
||||
|
||||
printk(KERN_WARNING "rar- value read to data register is %x\n",
|
||||
addr);
|
||||
|
||||
if (result)
|
||||
return -1;
|
||||
else
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
|
||||
* Initialize RAR parameters, such as physical addresses, etc.
|
||||
|
||||
*/
|
||||
static int memrar_init_rar_params(struct pci_dev *pdev)
|
||||
{
|
||||
struct RAR_offsets const offsets[] = {
|
||||
{ LNC_BRAR0L, LNC_BRAR0H },
|
||||
{ LNC_BRAR1L, LNC_BRAR1H },
|
||||
{ LNC_BRAR2L, LNC_BRAR2H }
|
||||
};
|
||||
|
||||
size_t const num_offsets = sizeof(offsets) / sizeof(offsets[0]);
|
||||
struct RAR_offsets const *end = offsets + num_offsets;
|
||||
struct RAR_offsets const *i;
|
||||
unsigned int n = 0;
|
||||
int result = 0;
|
||||
|
||||
/* Retrieve RAR start and end physical addresses. */
|
||||
|
||||
/*
|
||||
* Access the RAR registers through the Lincroft Message Bus
|
||||
* Interface on PCI device: 00:00.0 Host bridge.
|
||||
*/
|
||||
|
||||
/* struct pci_dev *pdev = pci_get_bus_and_slot(0, PCI_DEVFN(0,0)); */
|
||||
|
||||
if (pdev == NULL)
|
||||
return -ENODEV;
|
||||
|
||||
for (i = offsets; i != end; ++i, ++n) {
|
||||
if (memrar_get_rar_addr (pdev,
|
||||
(*i).low,
|
||||
&(rar_addr[n].low)) != 0
|
||||
|| memrar_get_rar_addr (pdev,
|
||||
(*i).high,
|
||||
&(rar_addr[n].high)) != 0) {
|
||||
result = -1;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/* Done accessing the device. */
|
||||
/* pci_dev_put(pdev); */
|
||||
|
||||
if (result == 0) {
|
||||
if(1) {
|
||||
size_t z;
|
||||
for (z = 0; z != MRST_NUM_RAR; ++z) {
|
||||
printk(KERN_WARNING "rar - BRAR[%u] physical address low\n"
|
||||
"\tlow: 0x%08x\n"
|
||||
"\thigh: 0x%08x\n",
|
||||
z,
|
||||
rar_addr[z].low,
|
||||
rar_addr[z].high);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
/*
|
||||
function that is activaed on the succesfull probe of the RAR device
|
||||
*/
|
||||
static int __devinit rar_probe(struct pci_dev *pdev, struct pci_device_id *ent)
|
||||
{
|
||||
/* error */
|
||||
int error;
|
||||
|
||||
/*------------------------
|
||||
CODE
|
||||
---------------------------*/
|
||||
|
||||
DEBUG_PRINT_0(RAR_DEBUG_LEVEL_EXTENDED,
|
||||
"Rar pci probe starting\n");
|
||||
error = 0;
|
||||
|
||||
/* enable the device */
|
||||
error = pci_enable_device(pdev);
|
||||
if (error) {
|
||||
DEBUG_PRINT_0(RAR_DEBUG_LEVEL_EXTENDED,
|
||||
"error enabling pci device\n");
|
||||
goto end_function;
|
||||
}
|
||||
|
||||
rar_dev = pdev;
|
||||
registered = 1;
|
||||
|
||||
/* Initialize the RAR parameters, which have to be retrieved */
|
||||
/* via the message bus service */
|
||||
error=memrar_init_rar_params(rar_dev);
|
||||
|
||||
if (error) {
|
||||
DEBUG_PRINT_0(RAR_DEBUG_LEVEL_EXTENDED,
|
||||
"error getting RAR addresses device\n");
|
||||
registered = 0;
|
||||
goto end_function;
|
||||
}
|
||||
|
||||
end_function:
|
||||
|
||||
return error;
|
||||
}
|
||||
|
||||
/*
|
||||
this function registers th driver to
|
||||
the device subsystem( either PCI, USB, etc)
|
||||
*/
|
||||
static int __init rar_init_handler(void)
|
||||
{
|
||||
return pci_register_driver(&rar_pci_driver);
|
||||
}
|
||||
|
||||
static void __exit rar_exit_handler(void)
|
||||
{
|
||||
pci_unregister_driver(&rar_pci_driver);
|
||||
}
|
||||
|
||||
module_init(rar_init_handler);
|
||||
module_exit(rar_exit_handler);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
|
||||
|
||||
/* The get_rar_address function is used by other device drivers
|
||||
* to obtain RAR address information on a RAR. It takes two
|
||||
* parameter:
|
||||
*
|
||||
* int rar_index
|
||||
* The rar_index is an index to the rar for which you wish to retrieve
|
||||
* the address information.
|
||||
* Values can be 0,1, or 2.
|
||||
*
|
||||
* struct RAR_address_struct is a pointer to a place to which the function
|
||||
* can return the address structure for the RAR.
|
||||
*
|
||||
* The function returns a 0 upon success or a -1 if there is no RAR
|
||||
* facility on this system.
|
||||
*/
|
||||
int get_rar_address(int rar_index,struct RAR_address_struct *addresses)
|
||||
{
|
||||
if (registered && (rar_index < 3) && (rar_index >= 0)) {
|
||||
*addresses=rar_addr[rar_index];
|
||||
/* strip off lock bit information */
|
||||
addresses->low = addresses->low & 0xfffffff0;
|
||||
addresses->high = addresses->high & 0xfffffff0;
|
||||
return 0;
|
||||
}
|
||||
|
||||
else {
|
||||
return -ENODEV;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
EXPORT_SYMBOL(get_rar_address);
|
||||
|
||||
/* The lock_rar function is ued by other device drivers to lock an RAR.
|
||||
* once an RAR is locked, it stays locked until the next system reboot.
|
||||
* The function takes one parameter:
|
||||
*
|
||||
* int rar_index
|
||||
* The rar_index is an index to the rar that you want to lock.
|
||||
* Values can be 0,1, or 2.
|
||||
*
|
||||
* The function returns a 0 upon success or a -1 if there is no RAR
|
||||
* facility on this system.
|
||||
*/
|
||||
int lock_rar(int rar_index)
|
||||
{
|
||||
u32 working_addr;
|
||||
int result;
|
||||
if (registered && (rar_index < 3) && (rar_index >= 0)) {
|
||||
/* first make sure that lock bits are clear (this does lock) */
|
||||
working_addr=rar_addr[rar_index].low & 0xfffffff0;
|
||||
|
||||
/* now send that value to the register using the IPC */
|
||||
result=memrar_set_rar_addr(rar_dev,rar_index,working_addr);
|
||||
return result;
|
||||
}
|
||||
|
||||
else {
|
||||
return -ENODEV;
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,99 @@
|
|||
/* === RAR Physical Addresses === */
|
||||
struct RAR_address_struct {
|
||||
u32 low;
|
||||
u32 high;
|
||||
};
|
||||
|
||||
/* The get_rar_address function is used by other device drivers
|
||||
* to obtain RAR address information on a RAR. It takes two
|
||||
* parameter:
|
||||
*
|
||||
* int rar_index
|
||||
* The rar_index is an index to the rar for which you wish to retrieve
|
||||
* the address information.
|
||||
* Values can be 0,1, or 2.
|
||||
*
|
||||
* struct RAR_address_struct is a pointer to a place to which the function
|
||||
* can return the address structure for the RAR.
|
||||
*
|
||||
* The function returns a 0 upon success or a -1 if there is no RAR
|
||||
* facility on this system.
|
||||
*/
|
||||
int get_rar_address(int rar_index,struct RAR_address_struct *addresses);
|
||||
|
||||
|
||||
/* The lock_rar function is ued by other device drivers to lock an RAR.
|
||||
* once an RAR is locked, it stays locked until the next system reboot.
|
||||
* The function takes one parameter:
|
||||
*
|
||||
* int rar_index
|
||||
* The rar_index is an index to the rar that you want to lock.
|
||||
* Values can be 0,1, or 2.
|
||||
*
|
||||
* The function returns a 0 upon success or a -1 if there is no RAR
|
||||
* facility on this system.
|
||||
*/
|
||||
int lock_rar(int rar_index);
|
||||
|
||||
|
||||
/* DEBUG LEVEL MASKS */
|
||||
#define RAR_DEBUG_LEVEL_BASIC 0x1
|
||||
|
||||
#define RAR_DEBUG_LEVEL_REGISTERS 0x2
|
||||
|
||||
#define RAR_DEBUG_LEVEL_EXTENDED 0x4
|
||||
|
||||
#define DEBUG_LEVEL 0x7
|
||||
|
||||
/* FUNCTIONAL MACROS */
|
||||
|
||||
/* debug macro without paramaters */
|
||||
#define DEBUG_PRINT_0(DEBUG_LEVEL , info) \
|
||||
do \
|
||||
{ \
|
||||
if(DEBUG_LEVEL) \
|
||||
{ \
|
||||
printk(KERN_WARNING info); \
|
||||
} \
|
||||
}while(0)
|
||||
|
||||
/* debug macro with 1 paramater */
|
||||
#define DEBUG_PRINT_1(DEBUG_LEVEL , info , param1) \
|
||||
do \
|
||||
{ \
|
||||
if(DEBUG_LEVEL) \
|
||||
{ \
|
||||
printk(KERN_WARNING info , param1); \
|
||||
} \
|
||||
}while(0)
|
||||
|
||||
/* debug macro with 2 paramaters */
|
||||
#define DEBUG_PRINT_2(DEBUG_LEVEL , info , param1, param2) \
|
||||
do \
|
||||
{ \
|
||||
if(DEBUG_LEVEL) \
|
||||
{ \
|
||||
printk(KERN_WARNING info , param1, param2); \
|
||||
} \
|
||||
}while(0)
|
||||
|
||||
/* debug macro with 3 paramaters */
|
||||
#define DEBUG_PRINT_3(DEBUG_LEVEL , info , param1, param2 , param3) \
|
||||
do \
|
||||
{ \
|
||||
if(DEBUG_LEVEL) \
|
||||
{ \
|
||||
printk(KERN_WARNING info , param1, param2 , param3); \
|
||||
} \
|
||||
}while(0)
|
||||
|
||||
/* debug macro with 4 paramaters */
|
||||
#define DEBUG_PRINT_4(DEBUG_LEVEL , info , param1, param2 , param3 , param4) \
|
||||
do \
|
||||
{ \
|
||||
if(DEBUG_LEVEL) \
|
||||
{ \
|
||||
printk(KERN_WARNING info , param1, param2 , param3 , param4); \
|
||||
} \
|
||||
}while(0)
|
||||
|
||||
Loading…
Reference in New Issue