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u-boot/cpu/mpc8260/serial_smc.c
wdenk 8bde7f776c * Code cleanup: 
- remove trailing white space, trailing empty lines, C++ comments, etc.
  - split cmd_boot.c (separate cmd_bdinfo.c and cmd_load.c)

* Patches by Kenneth Johansson, 25 Jun 2003:
  - major rework of command structure
    (work done mostly by Michal Cendrowski and Joakim Kristiansen)
2003-06-27 21:31:46 +00:00

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/*
* (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>
#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
/* 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 *)CFG_IMMR;
volatile smc_t *sp;
volatile smc_uart_t *up;
volatile cbd_t *tbdf, *rbdf;
volatile cpm8260_t *cp = &(im->im_cpm);
uint dpaddr;
/* 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
*/
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&~CMXSMR_MASK)|CMXSMR_VALUE;
/* Set up the baud rate generator.
*/
serial_setbrg ();
/* 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(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)
{
DECLARE_GLOBAL_DATA_PTR;
#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 cbd_t *tbdf;
volatile char *buf;
volatile smc_uart_t *up;
volatile immap_t *im = (immap_t *)CFG_IMMR;
if (c == '\n')
serial_putc ('\r');
up = (smc_uart_t *)&(im->im_dprambase[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
serial_puts (const char *s)
{
while (*s) {
serial_putc (*s++);
}
}
int
serial_getc(void)
{
volatile cbd_t *rbdf;
volatile unsigned char *buf;
volatile smc_uart_t *up;
volatile immap_t *im = (immap_t *)CFG_IMMR;
unsigned char c;
up = (smc_uart_t *)&(im->im_dprambase[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);
}
int
serial_tstc()
{
volatile cbd_t *rbdf;
volatile smc_uart_t *up;
volatile immap_t *im = (immap_t *)CFG_IMMR;
up = (smc_uart_t *)&(im->im_dprambase[PROFF_SMC]);
rbdf = (cbd_t *)&im->im_dprambase[up->smc_rbase];
return(!(rbdf->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 *)CFG_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(KGDB_SMC_INDEX, speed,
CONFIG_KGDB_EXTC_RATE, CONFIG_KGDB_EXTC_PINSEL);
#else
m8260_cpm_setbrg(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 *)CFG_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 *)CFG_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 */
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