Attachment 6047 Details for Bug 6991 – R300 dynamic clock initialization

R300 dynamic clock initialization

r300init2.c (text/x-c), 2.06 KB, created by Jerome Glisse on 2006-06-26 07:15:37 UTC

(hide)

Description:

Filename:

MIME Type:

Creator: Jerome Glisse

Created: 2006-06-26 07:15:37 UTC

Size: 2.06 KB

patch

obsolete

>
>#include <stdio.h>
>#include <stdlib.h>
>#include <sys/types.h>
>#include <sys/stat.h>
>#include <fcntl.h>
>#include <unistd.h>
>#include <sys/mman.h>
>
>/**
> * MMIO address
> */
>#define ADDR 0xfe9e0000
>#define SIZE (64 * 1024)
>
>#define READ(A,V)							\
>	read = ptr[A>>2];					        \
>	if (read != V) {						\
>		printf("RD error 0x%08X get 0x%08X\n", V, read);	\
>		getchar();						\
>	}
>
>
>/* Read PLL register */
>#define RADEON_CLOCK_CNTL_INDEX 0x00000008
>#define RADEON_CLOCK_CNTL_DATA  0x0000000C
>unsigned long RADEONINPLL(unsigned long *ptr, unsigned long addr)
>{
>	unsigned long read, save;
>	/* A few dummy reads of CRTC_GEN_CNTL and CLOCK_CNTL_DATA
>	* are used as workarounds for buggy rv200 & similar chips
>	* before and after accesses to CLOCK_CNTL_INDEX
>	*/
>	save = ptr[RADEON_CLOCK_CNTL_INDEX>>2];
>	ptr[RADEON_CLOCK_CNTL_INDEX>>2] = addr;
>	read = ptr[RADEON_CLOCK_CNTL_DATA>>2];
>	ptr[RADEON_CLOCK_CNTL_INDEX>>2] = save;
>
>	return read;
>}
>
>void RADEONOUTPLL(unsigned long *ptr, unsigned long addr, unsigned long value)
>{
>	unsigned long save;
>	/* A few dummy reads of CRTC_GEN_CNTL and CLOCK_CNTL_DATA
>	* are used as workarounds for buggy rv200 & similar chips
>	* before and after accesses to CLOCK_CNTL_INDEX
>	*/
>	save = ptr[RADEON_CLOCK_CNTL_INDEX>>2];
>	ptr[RADEON_CLOCK_CNTL_INDEX>>2] = addr;
>	ptr[RADEON_CLOCK_CNTL_DATA>>2]  = value;
>	ptr[RADEON_CLOCK_CNTL_INDEX>>2] = save;
>}
>
>int main(int argc, char *argv[])
>{
>	int mem;
>	unsigned long *ptr = NULL;
>	unsigned long write, read;
>
>	/* initialize */
>	sleep(1);
>	if((mem = open("/dev/mem", O_RDWR)) == -1){
>		printf("open failed\n");
>		return -1;
>	}
>	ptr = mmap(NULL, SIZE, PROT_READ|PROT_WRITE, MAP_SHARED, mem, ADDR);
>	if (ptr == NULL) {
>		perror("map");
>	}
>	printf("MAPPING OK...\n");
>	sleep(1);
>
>	/*****************************************************************/
>
>	read = RADEONINPLL(ptr, 0x0000030D);
>	/* 0x00810002 */
>	read = read | 0x00810000;
>	RADEONOUTPLL(ptr, 0x0000038D, read);
>
>	/*****************************************************************/
>
>	/* cleanup */
>	if(munmap(ptr, SIZE) == -1) {
>		perror("munmap");
>	}
>	close(mem);
>
>	return 0;
>}

Actions: View

Attachments on bug 6991: 6030 | 6047 | 6056 | 6057 | 6060

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.