diff options
Diffstat (limited to 'arch/ppc/cpu/mpc8260/serial_smc.c')
| -rw-r--r-- | arch/ppc/cpu/mpc8260/serial_smc.c | 467 |
1 files changed, 0 insertions, 467 deletions
diff --git a/arch/ppc/cpu/mpc8260/serial_smc.c b/arch/ppc/cpu/mpc8260/serial_smc.c deleted file mode 100644 index fbb3fb0420..0000000000 --- a/arch/ppc/cpu/mpc8260/serial_smc.c +++ /dev/null @@ -1,467 +0,0 @@ -/* - * (C) Copyright 2000, 2001, 2002 - * Wolfgang Denk, DENX Software Engineering, wd@denx.de. - * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - * - * Hacked for MPC8260 by Murray.Jensen@cmst.csiro.au, 19-Oct-00, with - * changes based on the file arch/ppc/mbxboot/m8260_tty.c from the - * Linux/PPC sources (m8260_tty.c had no copyright info in it). - */ - -/* - * Minimal serial functions needed to use one of the SMC ports - * as serial console interface. - */ - -#include <common.h> -#include <mpc8260.h> -#include <asm/cpm_8260.h> - -DECLARE_GLOBAL_DATA_PTR; - -#if defined(CONFIG_CONS_ON_SMC) - -#if CONFIG_CONS_INDEX == 1 /* Console on SMC1 */ - -#define SMC_INDEX 0 -#define PROFF_SMC_BASE PROFF_SMC1_BASE -#define PROFF_SMC PROFF_SMC1 -#define CPM_CR_SMC_PAGE CPM_CR_SMC1_PAGE -#define CPM_CR_SMC_SBLOCK CPM_CR_SMC1_SBLOCK -#define CMXSMR_MASK (CMXSMR_SMC1|CMXSMR_SMC1CS_MSK) -#define CMXSMR_VALUE CMXSMR_SMC1CS_BRG7 - -#elif CONFIG_CONS_INDEX == 2 /* Console on SMC2 */ - -#define SMC_INDEX 1 -#define PROFF_SMC_BASE PROFF_SMC2_BASE -#define PROFF_SMC PROFF_SMC2 -#define CPM_CR_SMC_PAGE CPM_CR_SMC2_PAGE -#define CPM_CR_SMC_SBLOCK CPM_CR_SMC2_SBLOCK -#define CMXSMR_MASK (CMXSMR_SMC2|CMXSMR_SMC2CS_MSK) -#define CMXSMR_VALUE CMXSMR_SMC2CS_BRG8 - -#else - -#error "console not correctly defined" - -#endif - -#if !defined(CONFIG_SYS_SMC_RXBUFLEN) -#define CONFIG_SYS_SMC_RXBUFLEN 1 -#define CONFIG_SYS_MAXIDLE 0 -#else -#if !defined(CONFIG_SYS_MAXIDLE) -#error "you must define CONFIG_SYS_MAXIDLE" -#endif -#endif - -typedef volatile struct serialbuffer { - cbd_t rxbd; /* Rx BD */ - cbd_t txbd; /* Tx BD */ - uint rxindex; /* index for next character to read */ - volatile uchar rxbuf[CONFIG_SYS_SMC_RXBUFLEN];/* rx buffers */ - volatile uchar txbuf; /* tx buffers */ -} serialbuffer_t; - -/* map rs_table index to baud rate generator index */ -static unsigned char brg_map[] = { - 6, /* BRG7 for SMC1 */ - 7, /* BRG8 for SMC2 */ - 0, /* BRG1 for SCC1 */ - 1, /* BRG1 for SCC2 */ - 2, /* BRG1 for SCC3 */ - 3, /* BRG1 for SCC4 */ -}; - -int serial_init (void) -{ - volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; - volatile smc_t *sp; - volatile smc_uart_t *up; - volatile cpm8260_t *cp = &(im->im_cpm); - uint dpaddr; - volatile serialbuffer_t *rtx; - - /* initialize pointers to SMC */ - - sp = (smc_t *) &(im->im_smc[SMC_INDEX]); - *(ushort *)(&im->im_dprambase[PROFF_SMC_BASE]) = PROFF_SMC; - up = (smc_uart_t *)&im->im_dprambase[PROFF_SMC]; - - /* Disable transmitter/receiver. */ - sp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN); - - /* NOTE: I/O port pins are set up via the iop_conf_tab[] table */ - - /* Allocate space for two buffer descriptors in the DP ram. - * damm: allocating space after the two buffers for rx/tx data - */ - - /* allocate size of struct serialbuffer with bd rx/tx, - * buffer rx/tx and rx index - */ - dpaddr = m8260_cpm_dpalloc((sizeof(serialbuffer_t)), 16); - - rtx = (serialbuffer_t *)&im->im_dprambase[dpaddr]; - - /* Set the physical address of the host memory buffers in - * the buffer descriptors. - */ - rtx->rxbd.cbd_bufaddr = (uint) &rtx->rxbuf; - rtx->rxbd.cbd_sc = 0; - - rtx->txbd.cbd_bufaddr = (uint) &rtx->txbuf; - rtx->txbd.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; - - /* put the SMC channel into NMSI (non multiplexd serial interface) - * mode and wire either BRG7 to SMC1 or BRG8 to SMC2 (15-17). - */ - im->im_cpmux.cmx_smr = (im->im_cpmux.cmx_smr&~CMXSMR_MASK)|CMXSMR_VALUE; - - /* Set up the baud rate generator. */ - serial_setbrg (); - - /* Make the first buffer the only buffer. */ - rtx->txbd.cbd_sc |= BD_SC_WRAP; - rtx->rxbd.cbd_sc |= BD_SC_EMPTY | BD_SC_WRAP; - - /* single/multi character receive. */ - up->smc_mrblr = CONFIG_SYS_SMC_RXBUFLEN; - up->smc_maxidl = CONFIG_SYS_MAXIDLE; - rtx->rxindex = 0; - - /* Initialize Tx/Rx parameters. */ - - while (cp->cp_cpcr & CPM_CR_FLG) /* wait if cp is busy */ - ; - - cp->cp_cpcr = mk_cr_cmd(CPM_CR_SMC_PAGE, CPM_CR_SMC_SBLOCK, - 0, CPM_CR_INIT_TRX) | CPM_CR_FLG; - - while (cp->cp_cpcr & CPM_CR_FLG) /* wait if cp is busy */ - ; - - /* Enable transmitter/receiver. */ - sp->smc_smcmr |= SMCMR_REN | SMCMR_TEN; - - return (0); -} - -void -serial_setbrg (void) -{ -#if defined(CONFIG_CONS_USE_EXTC) - m8260_cpm_extcbrg(brg_map[SMC_INDEX], gd->baudrate, - CONFIG_CONS_EXTC_RATE, CONFIG_CONS_EXTC_PINSEL); -#else - m8260_cpm_setbrg(brg_map[SMC_INDEX], gd->baudrate); -#endif -} - -void -serial_putc(const char c) -{ - volatile smc_uart_t *up; - volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; - volatile serialbuffer_t *rtx; - - if (c == '\n') - serial_putc ('\r'); - - up = (smc_uart_t *)&(im->im_dprambase[PROFF_SMC]); - - rtx = (serialbuffer_t *)&im->im_dprambase[up->smc_rbase]; - - /* Wait for last character to go. */ - while (rtx->txbd.cbd_sc & BD_SC_READY & BD_SC_READY) - ; - rtx->txbuf = c; - rtx->txbd.cbd_datlen = 1; - rtx->txbd.cbd_sc |= BD_SC_READY; -} - -void -serial_puts (const char *s) -{ - while (*s) { - serial_putc (*s++); - } -} - -int -serial_getc(void) -{ - volatile smc_uart_t *up; - volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; - volatile serialbuffer_t *rtx; - unsigned char c; - - up = (smc_uart_t *)&(im->im_dprambase[PROFF_SMC]); - - rtx = (serialbuffer_t *)&im->im_dprambase[up->smc_rbase]; - - /* Wait for character to show up. */ - while (rtx->rxbd.cbd_sc & BD_SC_EMPTY) - ; - - /* the characters are read one by one, - * use the rxindex to know the next char to deliver - */ - c = *(unsigned char *) (rtx->rxbd.cbd_bufaddr + rtx->rxindex); - rtx->rxindex++; - - /* check if all char are readout, then make prepare for next receive */ - if (rtx->rxindex >= rtx->rxbd.cbd_datlen) { - rtx->rxindex = 0; - rtx->rxbd.cbd_sc |= BD_SC_EMPTY; - } - return(c); -} - -int -serial_tstc() -{ - volatile smc_uart_t *up; - volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; - volatile serialbuffer_t *rtx; - - up = (smc_uart_t *)&(im->im_dprambase[PROFF_SMC]); - rtx = (serialbuffer_t *)&im->im_dprambase[up->smc_rbase]; - - return !(rtx->rxbd.cbd_sc & BD_SC_EMPTY); -} - -#endif /* CONFIG_CONS_ON_SMC */ - -#if defined(CONFIG_KGDB_ON_SMC) - -#if defined(CONFIG_CONS_ON_SMC) && CONFIG_KGDB_INDEX == CONFIG_CONS_INDEX -#error Whoops! serial console and kgdb are on the same smc serial port -#endif - -#if CONFIG_KGDB_INDEX == 1 /* KGDB Port on SMC1 */ - -#define KGDB_SMC_INDEX 0 -#define KGDB_PROFF_SMC_BASE PROFF_SMC1_BASE -#define KGDB_PROFF_SMC PROFF_SMC1 -#define KGDB_CPM_CR_SMC_PAGE CPM_CR_SMC1_PAGE -#define KGDB_CPM_CR_SMC_SBLOCK CPM_CR_SMC1_SBLOCK -#define KGDB_CMXSMR_MASK (CMXSMR_SMC1|CMXSMR_SMC1CS_MSK) -#define KGDB_CMXSMR_VALUE CMXSMR_SMC1CS_BRG7 - -#elif CONFIG_KGDB_INDEX == 2 /* KGDB Port on SMC2 */ - -#define KGDB_SMC_INDEX 1 -#define KGDB_PROFF_SMC_BASE PROFF_SMC2_BASE -#define KGDB_PROFF_SMC PROFF_SMC2 -#define KGDB_CPM_CR_SMC_PAGE CPM_CR_SMC2_PAGE -#define KGDB_CPM_CR_SMC_SBLOCK CPM_CR_SMC2_SBLOCK -#define KGDB_CMXSMR_MASK (CMXSMR_SMC2|CMXSMR_SMC2CS_MSK) -#define KGDB_CMXSMR_VALUE CMXSMR_SMC2CS_BRG8 - -#else - -#error "console not correctly defined" - -#endif - -void -kgdb_serial_init (void) -{ - volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; - volatile smc_t *sp; - volatile smc_uart_t *up; - volatile cbd_t *tbdf, *rbdf; - volatile cpm8260_t *cp = &(im->im_cpm); - uint dpaddr, speed = CONFIG_KGDB_BAUDRATE; - char *s, *e; - - if ((s = getenv("kgdbrate")) != NULL && *s != '\0') { - ulong rate = simple_strtoul(s, &e, 10); - if (e > s && *e == '\0') - speed = rate; - } - - /* initialize pointers to SMC */ - - sp = (smc_t *) &(im->im_smc[KGDB_SMC_INDEX]); - *(ushort *)(&im->im_dprambase[KGDB_PROFF_SMC_BASE]) = KGDB_PROFF_SMC; - up = (smc_uart_t *)&im->im_dprambase[KGDB_PROFF_SMC]; - - /* Disable transmitter/receiver. */ - sp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN); - - /* NOTE: I/O port pins are set up via the iop_conf_tab[] table */ - - /* Allocate space for two buffer descriptors in the DP ram. - * damm: allocating space after the two buffers for rx/tx data - */ - - dpaddr = m8260_cpm_dpalloc((2 * sizeof (cbd_t)) + 2, 16); - - /* Set the physical address of the host memory buffers in - * the buffer descriptors. - */ - rbdf = (cbd_t *)&im->im_dprambase[dpaddr]; - rbdf->cbd_bufaddr = (uint) (rbdf+2); - rbdf->cbd_sc = 0; - tbdf = rbdf + 1; - tbdf->cbd_bufaddr = ((uint) (rbdf+2)) + 1; - 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; - - /* put the SMC channel into NMSI (non multiplexd serial interface) - * mode and wire either BRG7 to SMC1 or BRG8 to SMC2 (15-17). - */ - im->im_cpmux.cmx_smr = - (im->im_cpmux.cmx_smr & ~KGDB_CMXSMR_MASK) | KGDB_CMXSMR_VALUE; - - /* Set up the baud rate generator. */ -#if defined(CONFIG_KGDB_USE_EXTC) - m8260_cpm_extcbrg(brg_map[KGDB_SMC_INDEX], speed, - CONFIG_KGDB_EXTC_RATE, CONFIG_KGDB_EXTC_PINSEL); -#else - m8260_cpm_setbrg(brg_map[KGDB_SMC_INDEX], speed); -#endif - - /* Make the first buffer the only buffer. */ - tbdf->cbd_sc |= BD_SC_WRAP; - rbdf->cbd_sc |= BD_SC_EMPTY | BD_SC_WRAP; - - /* Single character receive. */ - up->smc_mrblr = 1; - up->smc_maxidl = 0; - - /* Initialize Tx/Rx parameters. */ - - while (cp->cp_cpcr & CPM_CR_FLG) /* wait if cp is busy */ - ; - - cp->cp_cpcr = mk_cr_cmd(KGDB_CPM_CR_SMC_PAGE, KGDB_CPM_CR_SMC_SBLOCK, - 0, CPM_CR_INIT_TRX) | CPM_CR_FLG; - - while (cp->cp_cpcr & CPM_CR_FLG) /* wait if cp is busy */ - ; - - /* Enable transmitter/receiver. */ - sp->smc_smcmr |= SMCMR_REN | SMCMR_TEN; - - printf("SMC%d at %dbps ", CONFIG_KGDB_INDEX, speed); -} - -void -putDebugChar(const char c) -{ - volatile cbd_t *tbdf; - volatile char *buf; - volatile smc_uart_t *up; - volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; - - if (c == '\n') - putDebugChar ('\r'); - - up = (smc_uart_t *)&(im->im_dprambase[KGDB_PROFF_SMC]); - - tbdf = (cbd_t *)&im->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; -} - -void -putDebugStr (const char *s) -{ - while (*s) { - putDebugChar (*s++); - } -} - -int -getDebugChar(void) -{ - volatile cbd_t *rbdf; - volatile unsigned char *buf; - volatile smc_uart_t *up; - volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR; - unsigned char c; - - up = (smc_uart_t *)&(im->im_dprambase[KGDB_PROFF_SMC]); - - rbdf = (cbd_t *)&im->im_dprambase[up->smc_rbase]; - - /* Wait for character to show up. */ - buf = (unsigned char *)rbdf->cbd_bufaddr; - while (rbdf->cbd_sc & BD_SC_EMPTY) - ; - c = *buf; - rbdf->cbd_sc |= BD_SC_EMPTY; - - return(c); -} - -void -kgdb_interruptible(int yes) -{ - return; -} - -#endif /* CONFIG_KGDB_ON_SMC */ |