9ba760e603
ask to map in oxpcie i/o memory and support serial i/o for it in the kernel. set oxpcie=<address> in boot monitor (retrieve address using pci_debug=1 output). (no sanity checking is done on the address currently.) disabled by default. The change also contains some other minor cleanup (a new serial.h to set register info common to UART and the OXPCIe card, in-kernel memory mapping a little more structured and env_get() to get sysenv variables without knowing about the params_buffer).
84 lines
1.4 KiB
C
84 lines
1.4 KiB
C
|
|
#include "kernel/kernel.h"
|
|
|
|
#if CONFIG_OXPCIE
|
|
|
|
/* Documentation is at http://www.plxtech.com/products/uart/oxpcie952 */
|
|
|
|
#include "oxpcie.h"
|
|
#include "serial.h"
|
|
|
|
PRIVATE unsigned char *oxpcie_vaddr = NULL;
|
|
|
|
PUBLIC void oxpcie_set_vaddr(unsigned char *vaddr)
|
|
{
|
|
oxpcie_vaddr = vaddr;
|
|
}
|
|
|
|
PRIVATE void oxpcie_init(void)
|
|
{
|
|
printf("oxpcie_init\n");
|
|
/* Enable access to EFR and DLM+DLL */
|
|
OXPCIE_LCR = 0xBF;
|
|
|
|
/* Set FICR[1] to increase FIFO */
|
|
OXPCIE_FICR = 0x01;
|
|
|
|
/* Set enhanced mode [4]
|
|
* no RTS/CTS [7:6]
|
|
* no special char detection [5]
|
|
* no in-band receive flow control [1:0]
|
|
* no in-band transmit flow control [3:2]
|
|
*/
|
|
OXPCIE_EFR = 0x10;
|
|
|
|
/* Set divisor register to 115200 baud. */
|
|
OXPCIE_DLM = 0x00;
|
|
OXPCIE_DLL = 0x22;
|
|
|
|
/* Forget DLM and DLL, set LCR to config. */
|
|
OXPCIE_LCR = LCR_CONFIG;
|
|
OXPCIE_LCR = LCR_CONFIG;
|
|
|
|
OXPCIE_TCR = 0x01;
|
|
OXPCIE_CPR = 0x20;
|
|
OXPCIE_CPR2 = 0;
|
|
}
|
|
|
|
PUBLIC void oxpcie_putc(char c)
|
|
{
|
|
static int inuse = 0;
|
|
|
|
if(vm_running && oxpcie_vaddr && !inuse) {
|
|
int i;
|
|
static int init_done;
|
|
inuse = 1;
|
|
|
|
if(!init_done) {
|
|
oxpcie_init();
|
|
init_done = 1;
|
|
}
|
|
|
|
for (i= 0; i<100000; i++) {
|
|
if(OXPCIE_LSR & LSR_THRE)
|
|
break;
|
|
}
|
|
OXPCIE_THR = c;
|
|
inuse = 0;
|
|
}
|
|
}
|
|
|
|
PUBLIC int oxpcie_in(void)
|
|
{
|
|
if(vm_running && oxpcie_vaddr) {
|
|
int lsr;
|
|
lsr = OXPCIE_LSR;
|
|
if(lsr & LSR_DR)
|
|
return (int) OXPCIE_RBR;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
#endif
|