diff options
Diffstat (limited to 'drivers/staging/rar/rar_driver.c')
| -rw-r--r-- | drivers/staging/rar/rar_driver.c | 444 |
1 files changed, 0 insertions, 444 deletions
diff --git a/drivers/staging/rar/rar_driver.c b/drivers/staging/rar/rar_driver.c deleted file mode 100644 index d85d1890e81e..000000000000 --- a/drivers/staging/rar/rar_driver.c +++ /dev/null @@ -1,444 +0,0 @@ -#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" - -/* 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 successfull probe of the RAR device -*/ -static int __devinit rar_probe(struct pci_dev *pdev, const struct pci_device_id *ent); - -static struct pci_device_id rar_pci_id_tbl[] = { - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4110) }, - { 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[%Zd] 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 activated on the successfull probe of the RAR device -*/ -static int __devinit rar_probe(struct pci_dev *pdev, const 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; - } -} |