3 * sep_ext_with_pci_driver.c - Security Processor Driver
4 * pci initialization functions
6 * Copyright(c) 2009 Intel Corporation. All rights reserved.
7 * Copyright(c) 2009 Discretix. All rights reserved.
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the Free
11 * Software Foundation; either version 2 of the License, or (at your option)
14 * This program is distributed in the hope that it will be useful, but WITHOUT
15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
19 * You should have received a copy of the GNU General Public License along with
20 * this program; if not, write to the Free Software Foundation, Inc., 59
21 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
25 * Mark Allyn mark.a.allyn@intel.com
29 * 2009.06.26 Initial publish
33 #include <linux/init.h>
34 #include <linux/module.h>
36 #include <linux/cdev.h>
37 #include <linux/kdev_t.h>
38 #include <linux/semaphore.h>
40 #include <linux/poll.h>
41 #include <linux/wait.h>
42 #include <linux/ioctl.h>
43 #include <linux/ioport.h>
45 #include <linux/interrupt.h>
46 #include <linux/pagemap.h>
47 #include <linux/pci.h>
48 #include <linux/firmware.h>
49 #include <linux/sched.h>
50 #include "sep_driver_hw_defs.h"
51 #include "sep_driver_config.h"
52 #include "sep_driver_api.h"
53 #include "sep_driver_ext_api.h"
56 #if SEP_DRIVER_ARM_DEBUG_MODE
58 #define CRYS_SEP_ROM_length 0x4000
60 #define CRYS_SEP_ROM_start_address 0x8000C000UL
62 #define CRYS_SEP_ROM_start_address_offset 0xC000UL
64 #define SEP_ROM_BANK_register 0x80008420UL
66 #define SEP_ROM_BANK_register_offset 0x8420UL
68 #define SEP_RAR_IO_MEM_REGION_START_ADDRESS 0x82000000
71 /* #define SEP_RAR_IO_MEM_REGION_SIZE (1024*1024*2)
73 static unsigned long CRYS_SEP_ROM[] = {
74 #include "SEP_ROM_image.h"
81 THOSE 2 definitions are specific to the board - must be
82 defined during integration
84 #define SEP_RAR_IO_MEM_REGION_START_ADDRESS 0xFF0D0000
88 #endif /* SEP_DRIVER_ARM_DEBUG_MODE */
90 #define BASE_ADDRESS_FOR_SYSTEM 0xfffc0000
91 #define SEP_RAR_IO_MEM_REGION_SIZE 0x40000
93 irqreturn_t sep_inthandler(int irq, void *dev_id);
95 /* Keep this a single static object for now to keep the conversion easy */
97 static struct sep_device sep_instance;
98 struct sep_device *sep_dev = &sep_instance;
101 unsigned long jiffies_future;
103 /*-----------------------------
105 --------------------------------*/
108 function that is activated on the succesfull probe of the SEP device
110 static int __devinit sep_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
112 static struct pci_device_id sep_pci_id_tbl[] = {
113 {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x080c)},
117 MODULE_DEVICE_TABLE(pci, sep_pci_id_tbl);
119 /* field for registering driver to PCI device */
120 static struct pci_driver sep_pci_driver = {
121 .name = "sep_sec_driver",
122 .id_table = sep_pci_id_tbl,
127 This functions locks the area of the resisnd and cache sep code
129 void sep_lock_cache_resident_area(void)
135 This functions copies the cache and resident from their source location into
136 destination memory, which is external to Linux VM and is given as
139 int sep_copy_cache_resident_to_area(unsigned long src_cache_addr, unsigned long cache_size_in_bytes, unsigned long src_resident_addr, unsigned long resident_size_in_bytes, unsigned long *dst_new_cache_addr_ptr, unsigned long *dst_new_resident_addr_ptr)
141 unsigned long resident_addr;
142 unsigned long cache_addr;
143 const struct firmware *fw;
145 char *cache_name = "cache.image.bin";
146 char *res_name = "resident.image.bin";
151 /*--------------------------------
153 -------------------------------------*/
156 edbg("SEP Driver:rar_virtual is %p\n", sep_dev->rar_virtual_address);
157 edbg("SEP Driver:rar_physical is %08lx\n", sep_dev->rar_physical_address);
159 sep_dev->rar_region_addr = (unsigned long) sep_dev->rar_virtual_address;
161 sep_dev->cache_physical_address = sep_dev->rar_physical_address;
162 sep_dev->cache_virtual_address = sep_dev->rar_virtual_address;
165 error = request_firmware(&fw, cache_name, &sep_dev->sep_pci_dev_ptr->dev);
167 edbg("SEP Driver:cant request cache fw\n");
171 edbg("SEP Driver:cache data loc is %p\n", (void *) fw->data);
172 edbg("SEP Driver:cache data size is %08Zx\n", fw->size);
174 memcpy((void *) sep_dev->cache_virtual_address, (void *) fw->data, fw->size);
176 sep_dev->cache_size = fw->size;
178 cache_addr = (unsigned long) sep_dev->cache_virtual_address;
180 release_firmware(fw);
182 sep_dev->resident_physical_address = sep_dev->cache_physical_address + sep_dev->cache_size;
183 sep_dev->resident_virtual_address = sep_dev->cache_virtual_address + sep_dev->cache_size;
186 error = request_firmware(&fw, res_name, &sep_dev->sep_pci_dev_ptr->dev);
188 edbg("SEP Driver:cant request res fw\n");
192 edbg("SEP Driver:res data loc is %p\n", (void *) fw->data);
193 edbg("SEP Driver:res data size is %08Zx\n", fw->size);
195 memcpy((void *) sep_dev->resident_virtual_address, (void *) fw->data, fw->size);
197 sep_dev->resident_size = fw->size;
199 release_firmware(fw);
201 resident_addr = (unsigned long) sep_dev->resident_virtual_address;
203 edbg("SEP Driver:resident_addr (physical )is %08lx\n", sep_dev->resident_physical_address);
204 edbg("SEP Driver:cache_addr (physical) is %08lx\n", sep_dev->cache_physical_address);
206 edbg("SEP Driver:resident_addr (logical )is %08lx\n", resident_addr);
207 edbg("SEP Driver:cache_addr (logical) is %08lx\n", cache_addr);
209 edbg("SEP Driver:resident_size is %08lx\n", sep_dev->resident_size);
210 edbg("SEP Driver:cache_size is %08lx\n", sep_dev->cache_size);
214 /* physical addresses */
215 *dst_new_cache_addr_ptr = sep_dev->cache_physical_address;
216 *dst_new_resident_addr_ptr = sep_dev->resident_physical_address;
222 This functions maps and allocates the
223 shared area on the external RAM (device)
224 The input is shared_area_size - the size of the memory to
225 allocate. The outputs
226 are kernel_shared_area_addr_ptr - the kerenl
227 address of the mapped and allocated
228 shared area, and phys_shared_area_addr_ptr
229 - the physical address of the shared area
231 int sep_map_and_alloc_shared_area(unsigned long shared_area_size, unsigned long *kernel_shared_area_addr_ptr, unsigned long *phys_shared_area_addr_ptr)
233 // shared_virtual_address = ioremap_nocache(0xda00000,shared_area_size);
234 sep_dev->shared_virtual_address = kmalloc(shared_area_size, GFP_KERNEL);
235 if (!sep_dev->shared_virtual_address) {
236 edbg("sep_driver:shared memory kmalloc failed\n");
240 sep_dev->shared_physical_address = __pa(sep_dev->shared_virtual_address);
241 /* shared_physical_address = 0xda00000; */
242 *kernel_shared_area_addr_ptr = (unsigned long) sep_dev->shared_virtual_address;
243 /* set the physical address of the shared area */
244 *phys_shared_area_addr_ptr = sep_dev->shared_physical_address;
245 edbg("SEP Driver:shared_virtual_address is %p\n", sep_dev->shared_virtual_address);
246 edbg("SEP Driver:shared_region_size is %08lx\n", shared_area_size);
247 edbg("SEP Driver:shared_physical_addr is %08lx\n", *phys_shared_area_addr_ptr);
253 This functions unmaps and deallocates the shared area
254 on the external RAM (device)
255 The input is shared_area_size - the size of the memory to deallocate,kernel_
256 shared_area_addr_ptr - the kernel address of the mapped and allocated
257 shared area,phys_shared_area_addr_ptr - the physical address of
260 void sep_unmap_and_free_shared_area(unsigned long shared_area_size, unsigned long kernel_shared_area_addr, unsigned long phys_shared_area_addr)
262 kfree((void *) kernel_shared_area_addr);
266 This functions returns the physical address inside shared area according
267 to the virtual address. It can be either on the externa RAM device
268 (ioremapped), or on the system RAM
269 This implementation is for the external RAM
271 unsigned long sep_shared_area_virt_to_phys(unsigned long virt_address)
273 edbg("SEP Driver:sh virt to phys v %08lx\n", virt_address);
274 edbg("SEP Driver:sh virt to phys p %08lx\n", sep_dev->shared_physical_address + (virt_address - (unsigned long) sep_dev->shared_virtual_address));
276 return (unsigned long) sep_dev->shared_physical_address + (virt_address - (unsigned long) sep_dev->shared_virtual_address);
280 This functions returns the virtual address inside shared area
281 according to the physical address. It can be either on the
282 externa RAM device (ioremapped), or on the system RAM This implementation
283 is for the external RAM
285 unsigned long sep_shared_area_phys_to_virt(unsigned long phys_address)
287 return (unsigned long) sep_dev->shared_virtual_address + (phys_address - sep_dev->shared_physical_address);
292 function that is activaed on the succesfull probe of the SEP device
294 static int __devinit sep_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
298 edbg("Sep pci probe starting\n");
300 /* enable the device */
301 error = pci_enable_device(pdev);
303 edbg("error enabling pci device\n");
307 /* set the pci dev pointer */
308 sep_dev->sep_pci_dev_ptr = pdev;
310 /* get the io memory start address */
311 sep_dev->io_memory_start_physical_address = pci_resource_start(pdev, 0);
312 if (!sep_dev->io_memory_start_physical_address) {
313 edbg("SEP Driver error pci resource start\n");
317 /* get the io memory end address */
318 sep_dev->io_memory_end_physical_address = pci_resource_end(pdev, 0);
319 if (!sep_dev->io_memory_end_physical_address) {
320 edbg("SEP Driver error pci resource end\n");
324 sep_dev->io_memory_size = sep_dev->io_memory_end_physical_address - sep_dev->io_memory_start_physical_address + 1;
326 edbg("SEP Driver:io_memory_start_physical_address is %08lx\n", sep_dev->io_memory_start_physical_address);
328 edbg("SEP Driver:io_memory_end_phyaical_address is %08lx\n", sep_dev->io_memory_end_physical_address);
330 edbg("SEP Driver:io_memory_size is %08lx\n", sep_dev->io_memory_size);
332 sep_dev->io_memory_start_virtual_address = ioremap_nocache(sep_dev->io_memory_start_physical_address, sep_dev->io_memory_size);
333 if (!sep_dev->io_memory_start_virtual_address) {
334 edbg("SEP Driver error ioremap of io memory\n");
338 edbg("SEP Driver:io_memory_start_virtual_address is %p\n", sep_dev->io_memory_start_virtual_address);
340 sep_dev->reg_base_address = (void __iomem *) sep_dev->io_memory_start_virtual_address;
343 /* set up system base address and shared memory location */
345 sep_dev->rar_virtual_address = kmalloc(2 * SEP_RAR_IO_MEM_REGION_SIZE, GFP_KERNEL);
347 if (!sep_dev->rar_virtual_address) {
348 edbg("SEP Driver:cant kmalloc rar\n");
352 sep_dev->rar_physical_address = __pa(sep_dev->rar_virtual_address);
354 edbg("SEP Driver:rar_physical is %08lx\n", sep_dev->rar_physical_address);
355 edbg("SEP Driver:rar_virtual is %p\n", sep_dev->rar_virtual_address);
357 #if !SEP_DRIVER_POLLING_MODE
359 edbg("SEP Driver: about to write IMR and ICR REG_ADDR\n");
361 /* clear ICR register */
362 sep_write_reg(sep_dev, HW_HOST_ICR_REG_ADDR, 0xFFFFFFFF);
364 /* set the IMR register - open only GPR 2 */
365 sep_write_reg(sep_dev, HW_HOST_IMR_REG_ADDR, (~(0x1 << 13)));
367 /* figure out our irq */
369 error = pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, (u8 *) & sep_dev->sep_irq);
371 edbg("SEP Driver: my irq is %d\n", sep_irq);
373 edbg("SEP Driver: about to call request_irq\n");
374 /* get the interrupt line */
375 error = request_irq(sep_irq, sep_inthandler, IRQF_SHARED, "sep_driver", &sep_dev->reg_base_address);
380 edbg("SEP Driver: about to write IMR REG_ADDR");
382 /* set the IMR register - open only GPR 2 */
383 sep_write_reg(sep_dev, HW_HOST_IMR_REG_ADDR, (~(0x1 << 13)));
385 #endif /* SEP_DRIVER_POLLING_MODE */
391 this function registers th driver to
392 the device subsystem( either PCI, USB, etc)
394 int sep_register_driver_to_device(void)
396 return pci_register_driver(&sep_pci_driver);
401 void sep_load_rom_code(void)
403 #if SEP_DRIVER_ARM_DEBUG_MODE
404 /* Index variables */
405 unsigned long i, k, j;
406 unsigned long regVal;
408 unsigned long warning;
410 /* Loading ROM from SEP_ROM_image.h file */
411 k = sizeof(CRYS_SEP_ROM);
413 edbg("SEP Driver: DX_CC_TST_SepRomLoader start\n");
415 edbg("SEP Driver: k is %lu\n", k);
416 edbg("SEP Driver: sep_dev->reg_base_address is %p\n", sep_dev->reg_base_address);
417 edbg("SEP Driver: CRYS_SEP_ROM_start_address_offset is %p\n", CRYS_SEP_ROM_start_address_offset);
419 for (i = 0; i < 4; i++) {
421 sep_write_reg(sep_dev, SEP_ROM_BANK_register_offset, i);
423 for (j = 0; j < CRYS_SEP_ROM_length / 4; j++) {
424 sep_write_reg(sep_dev, CRYS_SEP_ROM_start_address_offset + 4 * j, CRYS_SEP_ROM[i * 0x1000 + j]);
429 j = CRYS_SEP_ROM_length;
436 sep_write_reg(sep_dev, HW_HOST_SEP_SW_RST_REG_ADDR, 0x1);
438 /* poll for SEP ROM boot finish */
440 retVal = sep_read_reg(sep_dev, HW_HOST_SEP_HOST_GPR3_REG_ADDR);
443 edbg("SEP Driver: ROM polling ended\n");
447 /* fatal error - read erro status from GPRO */
448 Error = sep_read_reg(sep_dev, HW_HOST_SEP_HOST_GPR0_REG_ADDR);
449 edbg("SEP Driver: ROM polling case 1\n");
452 /* Boot First Phase ended */
453 warning = sep_read_reg(sep_dev, HW_HOST_SEP_HOST_GPR0_REG_ADDR);
454 edbg("SEP Driver: ROM polling case 2\n");
457 /* Cold boot ended successfully */
458 warning = sep_read_reg(sep_dev, HW_HOST_SEP_HOST_GPR0_REG_ADDR);
459 edbg("SEP Driver: ROM polling case 4\n");
463 /* Warmboot ended successfully */
464 warning = sep_read_reg(sep_dev, HW_HOST_SEP_HOST_GPR0_REG_ADDR);
465 edbg("SEP Driver: ROM polling case 8\n");
469 /* ColdWarm boot ended successfully */
470 warning = sep_read_reg(sep_dev, HW_HOST_SEP_HOST_GPR0_REG_ADDR);
471 edbg("SEP Driver: ROM polling case 16\n");
475 edbg("SEP Driver: ROM polling case 32\n");