patch-2.4.5 linux/arch/ppc/mbxboot/m8260_tty.c
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- Lines: 202
- Date:
Wed Dec 31 16:00:00 1969
- Orig file:
v2.4.4/linux/arch/ppc/mbxboot/m8260_tty.c
- Orig date:
Mon Jun 19 17:59:36 2000
diff -u --recursive --new-file v2.4.4/linux/arch/ppc/mbxboot/m8260_tty.c linux/arch/ppc/mbxboot/m8260_tty.c
@@ -1,201 +0,0 @@
-
-
-/* Minimal serial functions needed to send messages out the serial
- * port on SMC1.
- */
-#include <linux/types.h>
-#include "asm/mpc8260.h"
-#include "asm/cpm_8260.h"
-
-uint no_print;
-extern char *params[];
-extern int nparams;
-static u_char cons_hold[128], *sgptr;
-static int cons_hold_cnt;
-
-void
-serial_init(bd_t *bd)
-{
- volatile smc_t *sp;
- volatile smc_uart_t *up;
- volatile cbd_t *tbdf, *rbdf;
- volatile immap_t *ip;
- volatile iop8260_t *io;
- volatile cpm8260_t *cp;
- uint dpaddr, memaddr;
-
- ip = (immap_t *)IMAP_ADDR;
-
- sp = (smc_t*)&(ip->im_smc[0]);
- *(ushort *)(&ip->im_dprambase[PROFF_SMC1_BASE]) = PROFF_SMC1;
- up = (smc_uart_t *)&ip->im_dprambase[PROFF_SMC1];
-
- cp = &ip->im_cpm;
- io = &ip->im_ioport;
-
- /* Disable transmitter/receiver.
- */
- sp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN);
-
- /* Use Port D for SMC1 instead of other functions.
- */
- io->iop_ppard |= 0x00c00000;
- io->iop_pdird |= 0x00400000;
- io->iop_pdird &= ~0x00800000;
- io->iop_psord &= ~0x00c00000;
-
- /* Allocate space for two buffer descriptors in the DP ram.
- * For now, this address seems OK, but it may have to
- * change with newer versions of the firmware.
- */
- dpaddr = 0x0800;
-
- /* Grab a few bytes from the top of memory.
- */
-#if 1
- memaddr = (bd->bi_memsize - 256) & ~15;
-#else
- memaddr = 0x0f002c00;
-#endif
-
- /* Set the physical address of the host memory buffers in
- * the buffer descriptors.
- */
- rbdf = (cbd_t *)&ip->im_dprambase[dpaddr];
- rbdf->cbd_bufaddr = memaddr;
- rbdf->cbd_sc = 0;
- tbdf = rbdf + 1;
- tbdf->cbd_bufaddr = memaddr+128;
- tbdf->cbd_sc = 0;
-
- /* Set up the uart parameters in the parameter ram.
- */
- up->smc_rbase = dpaddr;
- up->smc_tbase = dpaddr+sizeof(cbd_t);
- up->smc_rfcr = CPMFCR_EB;
- up->smc_tfcr = CPMFCR_EB;
- up->smc_brklen = 0;
- up->smc_brkec = 0;
- up->smc_brkcr = 0;
-
- /* Set UART mode, 8 bit, no parity, one stop.
- * Enable receive and transmit.
- */
- sp->smc_smcmr = smcr_mk_clen(9) | SMCMR_SM_UART;
-
- /* Mask all interrupts and remove anything pending.
- */
- sp->smc_smcm = 0;
- sp->smc_smce = 0xff;
-
- /* Set up the baud rate generator.
- */
- ip->im_clkrst.car_sccr = 0; /* DIV 4 BRG */
- ip->im_cpmux.cmx_smr = 0;
- ip->im_brgc1 =
- ((((bd->bi_brgfreq * 1000000)/16) / bd->bi_baudrate) << 1) |
- CPM_BRG_EN;
-
- /* Make the first buffer the only buffer.
- */
- tbdf->cbd_sc |= BD_SC_WRAP;
- rbdf->cbd_sc |= BD_SC_EMPTY | BD_SC_WRAP;
-
-#if 0
- /* Single character receive.
- */
- up->smc_mrblr = 1;
- up->smc_maxidl = 0;
-#else
- up->smc_mrblr = 128;
- up->smc_maxidl = 8;
-#endif
-
- /* Initialize Tx/Rx parameters.
- */
- cp->cp_cpcr = mk_cr_cmd(CPM_CR_SMC1_PAGE, CPM_CR_SMC1_SBLOCK, 0, CPM_CR_INIT_TRX) | CPM_CR_FLG;
- while (cp->cp_cpcr & CPM_CR_FLG);
-
- /* Enable transmitter/receiver.
- */
- sp->smc_smcmr |= SMCMR_REN | SMCMR_TEN;
-}
-
-void
-serial_putchar(const char c)
-{
- volatile cbd_t *tbdf;
- volatile char *buf;
- volatile smc_uart_t *up;
- volatile immap_t *ip;
- extern bd_t *board_info;
-
- ip = (immap_t *)IMAP_ADDR;
- up = (smc_uart_t *)&(ip->im_dprambase[PROFF_SMC1]);
- tbdf = (cbd_t *)&ip->im_dprambase[up->smc_tbase];
-
- /* Wait for last character to go.
- */
- buf = (char *)tbdf->cbd_bufaddr;
- while (tbdf->cbd_sc & BD_SC_READY);
-
- *buf = c;
- tbdf->cbd_datlen = 1;
- tbdf->cbd_sc |= BD_SC_READY;
-}
-
-char
-serial_getc()
-{
- char c;
-
- if (cons_hold_cnt <= 0) {
- cons_hold_cnt = serial_readbuf(cons_hold);
- sgptr = cons_hold;
- }
- c = *sgptr++;
- cons_hold_cnt--;
-
- return(c);
-}
-
-int
-serial_readbuf(u_char *cbuf)
-{
- volatile cbd_t *rbdf;
- volatile char *buf;
- volatile smc_uart_t *up;
- volatile immap_t *ip;
- int i, nc;
-
- ip = (immap_t *)IMAP_ADDR;
-
- up = (smc_uart_t *)&(ip->im_dprambase[PROFF_SMC1]);
- rbdf = (cbd_t *)&ip->im_dprambase[up->smc_rbase];
-
- /* Wait for character to show up.
- */
- buf = (char *)rbdf->cbd_bufaddr;
- while (rbdf->cbd_sc & BD_SC_EMPTY);
- nc = rbdf->cbd_datlen;
- for (i=0; i<nc; i++)
- *cbuf++ = *buf++;
- rbdf->cbd_sc |= BD_SC_EMPTY;
-
- return(nc);
-}
-
-int
-serial_tstc()
-{
- volatile cbd_t *rbdf;
- volatile smc_uart_t *up;
- volatile immap_t *ip;
-
- ip = (immap_t *)IMAP_ADDR;
- up = (smc_uart_t *)&(ip->im_dprambase[PROFF_SMC1]);
- rbdf = (cbd_t *)&ip->im_dprambase[up->smc_rbase];
-
- return(!(rbdf->cbd_sc & BD_SC_EMPTY));
-}
-
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