| #ifndef __JEDEC_H__ |
| #define __JEDEC_H__ 1 |
| |
| extern int probe_jedec (struct flashchip * flash); |
| extern int erase_jedec (struct flashchip * flash); |
| extern int write_jedec (struct flashchip * flash, unsigned char * buf); |
| |
| extern __inline__ void toggle_ready_jedec (volatile char * dst) |
| { |
| unsigned int i = 0; |
| char tmp1, tmp2; |
| |
| tmp1 = *dst & 0x40; |
| |
| while (i++ < 0xFFFFFF) { |
| tmp2 = *dst & 0x40; |
| if (tmp1 == tmp2) { |
| break; |
| } |
| tmp1 = tmp2; |
| } |
| } |
| |
| extern __inline__ void data_polling_jedec (volatile char * dst, char data) |
| { |
| unsigned int i = 0; |
| char tmp; |
| |
| data &= 0x80; |
| |
| while (i++ < 0xFFFFFF) { |
| tmp = *dst & 0x80; |
| if (tmp == data) { |
| break; |
| } |
| } |
| } |
| |
| extern __inline__ void protect_jedec (volatile char * bios) |
| { |
| *(volatile char *) (bios + 0x5555) = 0xAA; |
| *(volatile char *) (bios + 0x2AAA) = 0x55; |
| *(volatile char *) (bios + 0x5555) = 0xA0; |
| |
| usleep(200); |
| } |
| |
| extern int erase_sector_jedec (volatile char * bios, unsigned int page); |
| |
| extern __inline__ void write_page_jedec (volatile char * bios, char * src, volatile char * dst, |
| int page_size) |
| { |
| int i; |
| |
| *(volatile char *) (bios + 0x5555) = 0xAA; |
| *(volatile char *) (bios + 0x2AAA) = 0x55; |
| *(volatile char *) (bios + 0x5555) = 0xA0; |
| |
| for (i = 0; i < page_size; i++) { |
| /* transfer data from source to destination */ |
| *dst++ = *src++; |
| } |
| |
| usleep(100); |
| toggle_ready_jedec(dst-1); |
| } |
| |
| static __inline__ int write_sector_jedec(volatile char * bios, |
| unsigned char * src, |
| volatile unsigned char * dst, |
| unsigned int page_size) |
| { |
| int i; |
| volatile char *Temp; |
| |
| for (i = 0; i < page_size; i++) { |
| if (*dst != 0xff) { |
| printf("FATAL: dst %p not erased (val 0x%x\n", dst, *dst); |
| return(-1); |
| } |
| /* transfer data from source to destination */ |
| if (*src == 0xFF) { |
| dst++, src++; |
| /* If the data is 0xFF, don't program it */ |
| continue; |
| } |
| Temp = (bios + 0x5555); |
| *Temp = 0xAA; |
| Temp = bios + 0x2AAA; |
| *Temp = 0x55; |
| Temp = bios + 0x5555; |
| *Temp = 0xA0; |
| *dst = *src; |
| toggle_ready_jedec(bios); |
| if (*dst != *src) |
| printf("BAD! dst 0x%lx val 0x%x src 0x%x\n", |
| (unsigned long)dst, *dst, *src); |
| dst++, src++; |
| } |
| |
| return(0); |
| } |
| |
| #endif /* !__JEDEC_H__ */ |