mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-25 04:23:46 +00:00
52cb4d4fb3
So far the console API uses the following naming convention: ======Extract====== typedef struct device_t; int device_register (device_t * dev); int devices_init (void); int device_deregister(char *devname); struct list_head* device_get_list(void); device_t* device_get_by_name(char* name); device_t* device_clone(device_t *dev); ======= which is too generic and confusing. Instead of using device_XX and device_t we change this into stdio_XX and stdio_dev This will also allow to add later a generic device mechanism in order to have support for multiple devices and driver instances. Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Edited commit message. Signed-off-by: Wolfgang Denk <wd@denx.de>
269 lines
6 KiB
C
269 lines
6 KiB
C
/*
|
|
* (C) Copyright 2000
|
|
* 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
|
|
*/
|
|
|
|
/* Modified by Udi Finkelstein
|
|
*
|
|
* This file includes communication routines for SMC1 that can run even if
|
|
* SMC2 have already been initialized.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <watchdog.h>
|
|
#include <commproc.h>
|
|
#include <stdio_dev.h>
|
|
#include <lcd.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
#define SMC_INDEX 0
|
|
#define PROFF_SMC PROFF_SMC1
|
|
#define CPM_CR_CH_SMC CPM_CR_CH_SMC1
|
|
|
|
#define RBC823_KBD_BAUDRATE 38400
|
|
#define CPM_KEYBOARD_BASE 0x1000
|
|
/*
|
|
* Minimal serial functions needed to use one of the SMC ports
|
|
* as serial console interface.
|
|
*/
|
|
|
|
void smc1_setbrg (void)
|
|
{
|
|
volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
|
|
volatile cpm8xx_t *cp = &(im->im_cpm);
|
|
|
|
/* Set up the baud rate generator.
|
|
* See 8xx_io/commproc.c for details.
|
|
*
|
|
* Wire BRG2 to SMC1, BRG1 to SMC2
|
|
*/
|
|
|
|
cp->cp_simode = 0x00001000;
|
|
|
|
cp->cp_brgc2 =
|
|
(((gd->cpu_clk / 16 / RBC823_KBD_BAUDRATE)-1) << 1) | CPM_BRG_EN;
|
|
}
|
|
|
|
int smc1_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 cpm8xx_t *cp = &(im->im_cpm);
|
|
uint dpaddr;
|
|
|
|
/* initialize pointers to SMC */
|
|
|
|
sp = (smc_t *) &(cp->cp_smc[SMC_INDEX]);
|
|
up = (smc_uart_t *) &cp->cp_dparam[PROFF_SMC];
|
|
|
|
/* Disable transmitter/receiver.
|
|
*/
|
|
sp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN);
|
|
|
|
/* Enable SDMA.
|
|
*/
|
|
im->im_siu_conf.sc_sdcr = 1;
|
|
|
|
/* clear error conditions */
|
|
#ifdef CONFIG_SYS_SDSR
|
|
im->im_sdma.sdma_sdsr = CONFIG_SYS_SDSR;
|
|
#else
|
|
im->im_sdma.sdma_sdsr = 0x83;
|
|
#endif
|
|
|
|
/* clear SDMA interrupt mask */
|
|
#ifdef CONFIG_SYS_SDMR
|
|
im->im_sdma.sdma_sdmr = CONFIG_SYS_SDMR;
|
|
#else
|
|
im->im_sdma.sdma_sdmr = 0x00;
|
|
#endif
|
|
|
|
/* Use Port B for SMC1 instead of other functions.
|
|
*/
|
|
cp->cp_pbpar |= 0x000000c0;
|
|
cp->cp_pbdir &= ~0x000000c0;
|
|
cp->cp_pbodr &= ~0x000000c0;
|
|
|
|
/* Set the physical address of the host memory buffers in
|
|
* the buffer descriptors.
|
|
*/
|
|
|
|
#ifdef CONFIG_SYS_ALLOC_DPRAM
|
|
dpaddr = dpram_alloc_align (sizeof(cbd_t)*2 + 2, 8) ;
|
|
#else
|
|
dpaddr = CPM_KEYBOARD_BASE ;
|
|
#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.
|
|
* damm: allocating space after the two buffers for rx/tx data
|
|
*/
|
|
|
|
rbdf = (cbd_t *)&cp->cp_dpmem[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 = SMC_EB;
|
|
up->smc_tfcr = SMC_EB;
|
|
|
|
/* 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.
|
|
*/
|
|
smc1_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_CH_SMC, 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 smc1_putc(const char c)
|
|
{
|
|
volatile cbd_t *tbdf;
|
|
volatile char *buf;
|
|
volatile smc_uart_t *up;
|
|
volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
|
|
volatile cpm8xx_t *cpmp = &(im->im_cpm);
|
|
|
|
up = (smc_uart_t *)&cpmp->cp_dparam[PROFF_SMC];
|
|
|
|
tbdf = (cbd_t *)&cpmp->cp_dpmem[up->smc_tbase];
|
|
|
|
/* Wait for last character to go.
|
|
*/
|
|
|
|
buf = (char *)tbdf->cbd_bufaddr;
|
|
|
|
*buf = c;
|
|
tbdf->cbd_datlen = 1;
|
|
tbdf->cbd_sc |= BD_SC_READY;
|
|
__asm__("eieio");
|
|
|
|
while (tbdf->cbd_sc & BD_SC_READY) {
|
|
WATCHDOG_RESET ();
|
|
__asm__("eieio");
|
|
}
|
|
}
|
|
|
|
int smc1_getc(void)
|
|
{
|
|
volatile cbd_t *rbdf;
|
|
volatile unsigned char *buf;
|
|
volatile smc_uart_t *up;
|
|
volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
|
|
volatile cpm8xx_t *cpmp = &(im->im_cpm);
|
|
unsigned char c;
|
|
|
|
up = (smc_uart_t *)&cpmp->cp_dparam[PROFF_SMC];
|
|
|
|
rbdf = (cbd_t *)&cpmp->cp_dpmem[up->smc_rbase];
|
|
|
|
/* Wait for character to show up.
|
|
*/
|
|
buf = (unsigned char *)rbdf->cbd_bufaddr;
|
|
|
|
while (rbdf->cbd_sc & BD_SC_EMPTY)
|
|
WATCHDOG_RESET ();
|
|
|
|
c = *buf;
|
|
rbdf->cbd_sc |= BD_SC_EMPTY;
|
|
|
|
return(c);
|
|
}
|
|
|
|
int smc1_tstc(void)
|
|
{
|
|
volatile cbd_t *rbdf;
|
|
volatile smc_uart_t *up;
|
|
volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
|
|
volatile cpm8xx_t *cpmp = &(im->im_cpm);
|
|
|
|
up = (smc_uart_t *)&cpmp->cp_dparam[PROFF_SMC];
|
|
|
|
rbdf = (cbd_t *)&cpmp->cp_dpmem[up->smc_rbase];
|
|
|
|
return(!(rbdf->cbd_sc & BD_SC_EMPTY));
|
|
}
|
|
|
|
/* search for keyboard and register it if found */
|
|
int drv_keyboard_init(void)
|
|
{
|
|
int error = 0;
|
|
struct stdio_dev kbd_dev;
|
|
|
|
if (0) {
|
|
/* register the keyboard */
|
|
memset (&kbd_dev, 0, sizeof(struct stdio_dev));
|
|
strcpy(kbd_dev.name, "kbd");
|
|
kbd_dev.flags = DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
|
|
kbd_dev.putc = NULL;
|
|
kbd_dev.puts = NULL;
|
|
kbd_dev.getc = smc1_getc;
|
|
kbd_dev.tstc = smc1_tstc;
|
|
error = stdio_register (&kbd_dev);
|
|
} else {
|
|
lcd_is_enabled = 0;
|
|
lcd_disable();
|
|
}
|
|
return error;
|
|
}
|