summaryrefslogtreecommitdiffstats
path: root/arch/ppc/boot/simple/m8260_tty.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/ppc/boot/simple/m8260_tty.c')
-rw-r--r--arch/ppc/boot/simple/m8260_tty.c325
1 files changed, 0 insertions, 325 deletions
diff --git a/arch/ppc/boot/simple/m8260_tty.c b/arch/ppc/boot/simple/m8260_tty.c
deleted file mode 100644
index d770947e9b8f..000000000000
--- a/arch/ppc/boot/simple/m8260_tty.c
+++ /dev/null
@@ -1,325 +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/cpm2.h>
-#include <asm/immap_cpm2.h>
-
-uint no_print;
-extern char *params[];
-extern int nparams;
-static u_char cons_hold[128], *sgptr;
-static int cons_hold_cnt;
-
-/* If defined, enables serial console. The value (1 through 4)
- * should designate which SCC is used, but this isn't complete. Only
- * SCC1 is known to work at this time.
- * We're only linked if SERIAL_CPM_CONSOLE=y, so we only need to test
- * SERIAL_CPM_SCC1.
- */
-#ifdef CONFIG_SERIAL_CPM_SCC1
-#define SCC_CONSOLE 1
-#endif
-
-unsigned long
-serial_init(int ignored, bd_t *bd)
-{
-#ifdef SCC_CONSOLE
- volatile scc_t *sccp;
- volatile scc_uart_t *sup;
-#else
- volatile smc_t *sp;
- volatile smc_uart_t *up;
-#endif
- volatile cbd_t *tbdf, *rbdf;
- volatile cpm2_map_t *ip;
- volatile iop_cpm2_t *io;
- volatile cpm_cpm2_t *cp;
- uint dpaddr, memaddr;
-
- ip = (cpm2_map_t *)CPM_MAP_ADDR;
- cp = &ip->im_cpm;
- io = &ip->im_ioport;
-
- /* Perform a reset.
- */
- cp->cp_cpcr = (CPM_CR_RST | CPM_CR_FLG);
-
- /* Wait for it.
- */
- while (cp->cp_cpcr & CPM_CR_FLG);
-
-#ifdef CONFIG_ADS8260
- /* Enable the RS-232 transceivers.
- */
- *(volatile uint *)(BCSR_ADDR + 4) &=
- ~(BCSR1_RS232_EN1 | BCSR1_RS232_EN2);
-#endif
-
-#ifdef SCC_CONSOLE
- sccp = (scc_t *)&(ip->im_scc[SCC_CONSOLE-1]);
- sup = (scc_uart_t *)&ip->im_dprambase[PROFF_SCC1 + ((SCC_CONSOLE-1) << 8)];
- sccp->scc_sccm &= ~(UART_SCCM_TX | UART_SCCM_RX);
- sccp->scc_gsmrl &= ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT);
-
- /* Use Port D for SCC1 instead of other functions.
- */
- io->iop_ppard |= 0x00000003;
- io->iop_psord &= ~0x00000001; /* Rx */
- io->iop_psord |= 0x00000002; /* Tx */
- io->iop_pdird &= ~0x00000001; /* Rx */
- io->iop_pdird |= 0x00000002; /* Tx */
-
-#else
- 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];
-
- /* 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;
-#endif
-
- /* 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.
- */
- memaddr = (bd->bi_memsize - 256) & ~15;
-
- /* 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.
- */
-#ifdef SCC_CONSOLE
- sup->scc_genscc.scc_rbase = dpaddr;
- sup->scc_genscc.scc_tbase = dpaddr + sizeof(cbd_t);
-
- /* Set up the uart parameters in the
- * parameter ram.
- */
- sup->scc_genscc.scc_rfcr = CPMFCR_GBL | CPMFCR_EB;
- sup->scc_genscc.scc_tfcr = CPMFCR_GBL | CPMFCR_EB;
-
- sup->scc_genscc.scc_mrblr = 128;
- sup->scc_maxidl = 8;
- sup->scc_brkcr = 1;
- sup->scc_parec = 0;
- sup->scc_frmec = 0;
- sup->scc_nosec = 0;
- sup->scc_brkec = 0;
- sup->scc_uaddr1 = 0;
- sup->scc_uaddr2 = 0;
- sup->scc_toseq = 0;
- sup->scc_char1 = 0x8000;
- sup->scc_char2 = 0x8000;
- sup->scc_char3 = 0x8000;
- sup->scc_char4 = 0x8000;
- sup->scc_char5 = 0x8000;
- sup->scc_char6 = 0x8000;
- sup->scc_char7 = 0x8000;
- sup->scc_char8 = 0x8000;
- sup->scc_rccm = 0xc0ff;
-
- /* Send the CPM an initialize command.
- */
- cp->cp_cpcr = mk_cr_cmd(CPM_CR_SCC1_PAGE, CPM_CR_SCC1_SBLOCK, 0,
- CPM_CR_INIT_TRX) | CPM_CR_FLG;
- while (cp->cp_cpcr & CPM_CR_FLG);
-
- /* Set UART mode, 8 bit, no parity, one stop.
- * Enable receive and transmit.
- */
- sccp->scc_gsmrh = 0;
- sccp->scc_gsmrl =
- (SCC_GSMRL_MODE_UART | SCC_GSMRL_TDCR_16 | SCC_GSMRL_RDCR_16);
-
- /* Disable all interrupts and clear all pending
- * events.
- */
- sccp->scc_sccm = 0;
- sccp->scc_scce = 0xffff;
- sccp->scc_dsr = 0x7e7e;
- sccp->scc_psmr = 0x3000;
-
- /* Wire BRG1 to SCC1. The console driver will take care of
- * others.
- */
- ip->im_cpmux.cmx_scr = 0;
-#else
- 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;
- up->smc_mrblr = 128;
- up->smc_maxidl = 8;
-
- /* 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_cpmux.cmx_smr = 0;
-#endif
-
- /* The baud rate divisor needs to be coordinated with clk_8260().
- */
- ip->im_brgc1 =
- (((bd->bi_brgfreq/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;
-
- /* Initialize Tx/Rx parameters.
- */
-#ifdef SCC_CONSOLE
- sccp->scc_gsmrl |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT);
-#else
- 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;
-#endif
-
- /* This is ignored.
- */
- return 0;
-}
-
-int
-serial_readbuf(u_char *cbuf)
-{
- volatile cbd_t *rbdf;
- volatile char *buf;
-#ifdef SCC_CONSOLE
- volatile scc_uart_t *sup;
-#else
- volatile smc_uart_t *up;
-#endif
- volatile cpm2_map_t *ip;
- int i, nc;
-
- ip = (cpm2_map_t *)CPM_MAP_ADDR;
-
-#ifdef SCC_CONSOLE
- sup = (scc_uart_t *)&ip->im_dprambase[PROFF_SCC1 + ((SCC_CONSOLE-1) << 8)];
- rbdf = (cbd_t *)&ip->im_dprambase[sup->scc_genscc.scc_rbase];
-#else
- up = (smc_uart_t *)&(ip->im_dprambase[PROFF_SMC1]);
- rbdf = (cbd_t *)&ip->im_dprambase[up->smc_rbase];
-#endif
-
- /* 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);
-}
-
-void
-serial_putc(void *ignored, const char c)
-{
- volatile cbd_t *tbdf;
- volatile char *buf;
-#ifdef SCC_CONSOLE
- volatile scc_uart_t *sup;
-#else
- volatile smc_uart_t *up;
-#endif
- volatile cpm2_map_t *ip;
-
- ip = (cpm2_map_t *)CPM_MAP_ADDR;
-#ifdef SCC_CONSOLE
- sup = (scc_uart_t *)&ip->im_dprambase[PROFF_SCC1 + ((SCC_CONSOLE-1) << 8)];
- tbdf = (cbd_t *)&ip->im_dprambase[sup->scc_genscc.scc_tbase];
-#else
- up = (smc_uart_t *)&(ip->im_dprambase[PROFF_SMC1]);
- tbdf = (cbd_t *)&ip->im_dprambase[up->smc_tbase];
-#endif
-
- /* 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(void *ignored)
-{
- 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_tstc(void *ignored)
-{
- volatile cbd_t *rbdf;
-#ifdef SCC_CONSOLE
- volatile scc_uart_t *sup;
-#else
- volatile smc_uart_t *up;
-#endif
- volatile cpm2_map_t *ip;
-
- ip = (cpm2_map_t *)CPM_MAP_ADDR;
-#ifdef SCC_CONSOLE
- sup = (scc_uart_t *)&ip->im_dprambase[PROFF_SCC1 + ((SCC_CONSOLE-1) << 8)];
- rbdf = (cbd_t *)&ip->im_dprambase[sup->scc_genscc.scc_rbase];
-#else
- up = (smc_uart_t *)&(ip->im_dprambase[PROFF_SMC1]);
- rbdf = (cbd_t *)&ip->im_dprambase[up->smc_rbase];
-#endif
-
- return(!(rbdf->cbd_sc & BD_SC_EMPTY));
-}
OpenPOWER on IntegriCloud