mirror of
git://projects.qi-hardware.com/ben-blinkenlights.git
synced 2024-11-23 17:34:37 +02:00
libubb/: helper library for UBB access
This commit is contained in:
Werner Almesberger
parent
025726e48b
commit
2c52dac4ca
34
libubb/Makefile
Normal file
34
libubb/Makefile
Normal file
@ -0,0 +1,34 @@
|
||||
#
|
||||
# libubb/Makefile - Build the UBB library
|
||||
#
|
||||
# Written 2012 by Werner Almesberger
|
||||
# Copyright 2012 Werner Almesberger
|
||||
#
|
||||
# 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.
|
||||
#
|
||||
|
||||
|
||||
TARGET = mipsel-openwrt-linux-
|
||||
CC = $(TARGET)gcc
|
||||
|
||||
CFLAGS = -g -Wall -Iinclude
|
||||
LIB = libubb.a
|
||||
|
||||
OBJS = ubb.o
|
||||
HDRS = ubb/ubb.h ubb/regbase.h ubb/regs4740.h
|
||||
|
||||
.PHONY: all clean spotless
|
||||
|
||||
all: $(LIB)
|
||||
|
||||
$(LIB): $(OBJS)
|
||||
$(AR) cr $@ $^
|
||||
|
||||
clean:
|
||||
rm -f $(OBJS)
|
||||
|
||||
spotless: clean
|
||||
rm -f $(LIB)
|
||||
49
libubb/include/ubb/regbase.h
Normal file
49
libubb/include/ubb/regbase.h
Normal file
@ -0,0 +1,49 @@
|
||||
/*
|
||||
* include/ubb/regbase.h - Jz4740 minimum register definitions for UBB
|
||||
*
|
||||
* Written 2011-2012 by Werner Almesberger
|
||||
* Copyright 2011-2012 Werner Almesberger
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#ifndef UBB_REGBASE_H
|
||||
#define UBB_REGBASE_H
|
||||
|
||||
#include <stdint.h>
|
||||
|
||||
|
||||
#define UBB_SOC_BASE 0x10000000
|
||||
#define UBB_REG_WINDOW 0x4000000
|
||||
|
||||
#define REG(n) (*(volatile uint32_t *) (ubb_mem+(n)))
|
||||
|
||||
#define REG_PADDR(r) ((unsigned long) ((void *) &(r)-ubb_mem+UBB_SOC_BASE))
|
||||
|
||||
|
||||
extern volatile void *ubb_mem;
|
||||
|
||||
|
||||
#define _GPIO(n) REG(0x0010000+(n))
|
||||
|
||||
#define PDPIN _GPIO(0x300) /* port D pin level */
|
||||
#define PDDAT _GPIO(0x310) /* port D data set */
|
||||
#define PDDATS _GPIO(0x314) /* port D data set */
|
||||
#define PDDATC _GPIO(0x318) /* port D data clear */
|
||||
#define PDPULL _GPIO(0x330) /* port D pull disable */
|
||||
#define PDPULLS _GPIO(0x334) /* port D pull disable set */
|
||||
#define PDPULLC _GPIO(0x338) /* port D pull disable clear */
|
||||
#define PDFUN _GPIO(0x340) /* port D function */
|
||||
#define PDFUNS _GPIO(0x344) /* port D function set */
|
||||
#define PDFUNC _GPIO(0x348) /* port D function clear */
|
||||
#define PDSEL _GPIO(0x350) /* port D select */
|
||||
#define PDSELS _GPIO(0x354) /* port D select set */
|
||||
#define PDSELC _GPIO(0x358) /* port D select clear */
|
||||
#define PDDIR _GPIO(0x360) /* port D direction */
|
||||
#define PDDIRS _GPIO(0x364) /* port D direction set */
|
||||
#define PDDIRC _GPIO(0x368) /* port D direction clear */
|
||||
|
||||
#endif /* !UBB_REGBASE_H */
|
||||
75
libubb/include/ubb/regs4740.h
Normal file
75
libubb/include/ubb/regs4740.h
Normal file
@ -0,0 +1,75 @@
|
||||
/*
|
||||
* include/ubb/regs4740.h - Jz4740 register definitions (subset)
|
||||
*
|
||||
* Written 2011-2012 by Werner Almesberger
|
||||
* Copyright 2011-2012 Werner Almesberger
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#ifndef UBB_REGS4740_H
|
||||
#define UBB_REGS4740_H
|
||||
|
||||
#include <stdint.h>
|
||||
|
||||
#include <ubb/regbase.h>
|
||||
|
||||
|
||||
#define _CGU(n) REG(0x0000000+(n))
|
||||
#define _INTC(n) REG(0x0001000+(n))
|
||||
#define _TCU(n) REG(0x0002000+(n))
|
||||
#define _MSC(n) REG(0x0021000+(n))
|
||||
#define _DMAC(n) REG(0x3020000+(n))
|
||||
#define _LCD(n) REG(0x3050000+(n))
|
||||
|
||||
#define CLKGR _CGU(0x0020) /* Clock Gate */
|
||||
#define MSCCDR _CGU(0x0068) /* MSC device clock divider */
|
||||
|
||||
#define ICMR _INTC(0x04) /* Interrupt controller mask */
|
||||
#define ICMSR _INTC(0x08) /* Interrupt controller mask set */
|
||||
#define ICMCR _INTC(0x0c) /* Interrupt controller mask clear */
|
||||
|
||||
#define TSSR _TCU(0x2c) /* Timer STOP set */
|
||||
#define TSCR _TCU(0x3c) /* Timer STOP clear */
|
||||
#define TESR _TCU(0x14) /* Timer counter enable set */
|
||||
#define TECR _TCU(0x18) /* Timer counter enable clear */
|
||||
#define TFR _TCU(0x20) /* Timer flag */
|
||||
#define TFSR _TCU(0x24) /* Timer flag set */
|
||||
#define TFCR _TCU(0x28) /* Timer flag clear */
|
||||
#define TCSR(n) _TCU(0x4c+0x10*(n)) /* Timer control */
|
||||
#define TDFR(n) _TCU(0x40+0x10*(n)) /* Timer data full */
|
||||
#define TDHR(n) _TCU(0x44+0x10*(n)) /* Timer data half */
|
||||
#define TCNT(n) _TCU(0x48+0x10*(n)) /* Timer counter */
|
||||
|
||||
#define MSC_STRPCL _MSC(0x00) /* Start/stop MMC/SD clock */
|
||||
#define MSC_STAT _MSC(0x04) /* MSC status */
|
||||
#define MSC_CLKRT _MSC(0x08) /* MSC clock rate */
|
||||
#define MSC_CMDAT _MSC(0x0c) /* MMC/SD command and data control */
|
||||
#define MSC_RESTO _MSC(0x10) /* MMC/SD response time out */
|
||||
#define MSC_BLKLEN _MSC(0x18) /* MMC/SD block length */
|
||||
#define MSC_NOB _MSC(0x1c) /* MMC/SD number of blocks */
|
||||
#define MSC_SNOB _MSC(0x20) /* MMC/SD successful blocks */
|
||||
#define MSC_IMASK _MSC(0x24) /* MMC/SD interrupt mask */
|
||||
#define MSC_IREG _MSC(0x28) /* MMC/SD interrupt */
|
||||
#define MSC_CMD _MSC(0x2c) /* MMC/SD command index */
|
||||
#define MSC_ARG _MSC(0x30) /* MMC/SD command argument */
|
||||
#define MSC_RXFIFO _MSC(0x38) /* MMC/SD receive data FIFO */
|
||||
#define MSC_TXFIFO _MSC(0x3c) /* MMC/SD transmit data FIFO */
|
||||
|
||||
#define _DMAn(n, r) _DMAC(0x20*(n)+(r))
|
||||
|
||||
#define DSA(n) _DMAn(n, 0x00) /* DMA source address */
|
||||
#define DTA(n) _DMAn(n, 0x04) /* DMA target address */
|
||||
#define DTC(n) _DMAn(n, 0x08) /* DMA transfer count */
|
||||
#define DRT(n) _DMAn(n, 0x0c) /* DMA request type */
|
||||
#define DCS(n) _DMAn(n, 0x10) /* DMA channel control/status */
|
||||
#define DCM(n) _DMAn(n, 0x14) /* DMA command */
|
||||
#define DMAC _DMAC(0x300) /* DMA control */
|
||||
#define DDR _DMAC(0x308) /* DMA doorbell */
|
||||
|
||||
#define LCDCTRL _LCD(0x30) /* LCD control */
|
||||
|
||||
#endif /* !UBB_REGS4740_H */
|
||||
44
libubb/include/ubb/ubb.h
Normal file
44
libubb/include/ubb/ubb.h
Normal file
@ -0,0 +1,44 @@
|
||||
/*
|
||||
* include/ubb/ubb.h - Access functions for the Universal Breakout Board
|
||||
*
|
||||
* Written 2012 by Werner Almesberger
|
||||
* Copyright 2012 Werner Almesberger
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#ifndef UBB_UBB_H
|
||||
#define UBB_UBB_H
|
||||
|
||||
#include <stdint.h>
|
||||
|
||||
#include <ubb/regbase.h>
|
||||
|
||||
|
||||
#define UBB_nPWR (1 << 2) /* PD02 */
|
||||
#define UBB_DAT2 (1 << 12) /* PD12 */
|
||||
#define UBB_DAT3 (1 << 13) /* PD13 */
|
||||
#define UBB_CMD (1 << 8) /* PD08 */
|
||||
#define UBB_CLK (1 << 9) /* PD09 */
|
||||
#define UBB_DAT0 (1 << 10) /* PD10 */
|
||||
#define UBB_DAT1 (1 << 11) /* PD11 */
|
||||
|
||||
#define UBB_ALL_IO (UBB_DAT2 | UBB_DAT3 | UBB_CMD | UBB_CLK | UBB_DAT0 | \
|
||||
UBB_DAT1)
|
||||
#define UBB_ALL (UBB_nPWR | UBB_ALL_IO)
|
||||
|
||||
#define SET(mask) PDDATS = (mask)
|
||||
#define CLR(mask) PDDATC = (mask)
|
||||
#define OUT(mask) PDDIRS = (mask)
|
||||
#define IN(mask) PDDIRC = (mask)
|
||||
#define PIN(mask) (!!(PDPIN & (mask)))
|
||||
|
||||
|
||||
int ubb_open(uint32_t keep);
|
||||
void ubb_power(int on);
|
||||
void ubb_close(uint32_t keep);
|
||||
|
||||
#endif /* !UBB_UBB_H */
|
||||
93
libubb/ubb.c
Normal file
93
libubb/ubb.c
Normal file
@ -0,0 +1,93 @@
|
||||
/*
|
||||
* libubb/ubb.c - Open/close UBB
|
||||
*
|
||||
* Written 2012 by Werner Almesberger
|
||||
* Copyright 2012 Werner Almesberger
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
|
||||
#include <stdint.h>
|
||||
#include <unistd.h>
|
||||
#include <fcntl.h>
|
||||
#include <sys/mman.h>
|
||||
|
||||
#include <ubb/ubb.h>
|
||||
|
||||
|
||||
volatile void *ubb_mem;
|
||||
|
||||
static int ubb_fd;
|
||||
static uint32_t data, dir, pull, func, sel;
|
||||
|
||||
|
||||
static void *map(off_t addr, size_t size, int *fd)
|
||||
{
|
||||
void *mem;
|
||||
|
||||
*fd = open("/dev/mem", O_RDWR | O_SYNC);
|
||||
if (*fd < 0)
|
||||
return NULL;
|
||||
mem = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, *fd, addr);
|
||||
if (mem == MAP_FAILED) {
|
||||
(void) close(*fd);
|
||||
return NULL;
|
||||
}
|
||||
return mem;
|
||||
}
|
||||
|
||||
|
||||
int ubb_open(uint32_t keep)
|
||||
{
|
||||
ubb_mem = map(UBB_SOC_BASE, UBB_REG_WINDOW, &ubb_fd);
|
||||
if (!ubb_mem)
|
||||
return -1;
|
||||
|
||||
data = PDDAT & UBB_ALL;
|
||||
dir = PDDIR & UBB_ALL;
|
||||
pull = PDPULL & UBB_ALL;
|
||||
func = PDFUN & UBB_ALL;
|
||||
sel = PDSEL & UBB_ALL;
|
||||
|
||||
/* enable pull-ups to let card ramp up power */
|
||||
|
||||
PDPULLC = UBB_ALL_IO & ~keep;
|
||||
PDDIRC = UBB_ALL_IO & ~keep;
|
||||
|
||||
PDFUNC = UBB_ALL & ~keep;
|
||||
PDSELC = UBB_ALL & ~keep;
|
||||
|
||||
PDDATS = UBB_nPWR & ~keep;
|
||||
PDDIRS = UBB_nPWR & ~keep;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
void ubb_power(int on)
|
||||
{
|
||||
if (on) {
|
||||
usleep(10*1000);
|
||||
PDDATC = UBB_nPWR;
|
||||
} else {
|
||||
PDDATS = UBB_nPWR;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void ubb_close(uint32_t keep)
|
||||
{
|
||||
PDSELS = sel & ~keep;
|
||||
PDFUNS = func & ~keep;
|
||||
|
||||
PDDATS = (data | UBB_nPWR) & ~keep;
|
||||
PDDIRS = (dir | UBB_nPWR) & ~keep;
|
||||
|
||||
PDPULLS = pull & ~keep;
|
||||
|
||||
close(ubb_fd);
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user