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MIPS: TXx9: 7 segment LED support 

Add sysfs interface for 7 segment LED and implement access routine for
RBTX4939.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Atsushi Nemoto 2008-10-20 23:28:50 +09:00 committed by Ralf Baechle
parent f591eb1e68
commit bc89b2bdef
5 changed files with 153 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/mips/include/asm/txx9/generic.h
View File

@ -86,4 +86,9 @@ void txx9_iocled_init(unsigned long baseaddr,
int basenum, unsigned int num, int lowactive,
const char *color, char **deftriggers);
/* 7SEG LED */
void txx9_7segled_init(unsigned int num,
void (*putc)(unsigned int pos, unsigned char val));
int txx9_7segled_putc(unsigned int pos, char c);
#endif /* __ASM_TXX9_GENERIC_H */

4
arch/mips/txx9/Kconfig
View File

@ -49,6 +49,7 @@ config TOSHIBA_RBTX4939
bool "Toshiba RBTX4939 bobard"
depends on MACH_TX49XX
select SOC_TX4939
select TXX9_7SEGLED
help
This Toshiba board is based on the TX4939 processor. Say Y here to
support this machine type
@ -86,6 +87,9 @@ config SOC_TX4939
select HW_HAS_PCI
select PCI_TX4927
config TXX9_7SEGLED
bool
config TOSHIBA_FPCIB0
bool "FPCIB0 Backplane Support"
depends on PCI && MACH_TXX9

112
arch/mips/txx9/generic/7segled.c Normal file
View File

@ -0,0 +1,112 @@
/*
* 7 Segment LED routines
* Based on RBTX49xx patch from CELF patch archive.
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* (C) Copyright TOSHIBA CORPORATION 2005-2007
* All Rights Reserved.
*/
#include <linux/sysdev.h>
#include <linux/slab.h>
#include <linux/map_to_7segment.h>
#include <asm/txx9/generic.h>
static unsigned int tx_7segled_num;
static void (*tx_7segled_putc)(unsigned int pos, unsigned char val);
void __init txx9_7segled_init(unsigned int num,
void (*putc)(unsigned int pos, unsigned char val))
{
tx_7segled_num = num;
tx_7segled_putc = putc;
}
static SEG7_CONVERSION_MAP(txx9_seg7map, MAP_ASCII7SEG_ALPHANUM_LC);
int txx9_7segled_putc(unsigned int pos, char c)
{
if (pos >= tx_7segled_num)
return -EINVAL;
c = map_to_seg7(&txx9_seg7map, c);
if (c < 0)
return c;
tx_7segled_putc(pos, c);
return 0;
}
static ssize_t ascii_store(struct sys_device *dev,
struct sysdev_attribute *attr,
const char *buf, size_t size)
{
unsigned int ch = dev->id;
txx9_7segled_putc(ch, buf[0]);
return size;
}
static ssize_t raw_store(struct sys_device *dev,
struct sysdev_attribute *attr,
const char *buf, size_t size)
{
unsigned int ch = dev->id;
tx_7segled_putc(ch, buf[0]);
return size;
}
static SYSDEV_ATTR(ascii, 0200, NULL, ascii_store);
static SYSDEV_ATTR(raw, 0200, NULL, raw_store);
static ssize_t map_seg7_show(struct sysdev_class *class, char *buf)
{
memcpy(buf, &txx9_seg7map, sizeof(txx9_seg7map));
return sizeof(txx9_seg7map);
}
static ssize_t map_seg7_store(struct sysdev_class *class,
const char *buf, size_t size)
{
if (size != sizeof(txx9_seg7map))
return -EINVAL;
memcpy(&txx9_seg7map, buf, size);
return size;
}
static SYSDEV_CLASS_ATTR(map_seg7, 0600, map_seg7_show, map_seg7_store);
static struct sysdev_class tx_7segled_sysdev_class = {
.name = "7segled",
};
static int __init tx_7segled_init_sysfs(void)
{
int error, i;
if (!tx_7segled_num)
return -ENODEV;
error = sysdev_class_register(&tx_7segled_sysdev_class);
if (error)
return error;
error = sysdev_class_create_file(&tx_7segled_sysdev_class,
&attr_map_seg7);
if (error)
return error;
for (i = 0; i < tx_7segled_num; i++) {
struct sys_device *dev;
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev) {
error = -ENODEV;
break;
}
dev->id = i;
dev->cls = &tx_7segled_sysdev_class;
error = sysdev_register(dev);
if (!error) {
sysdev_create_file(dev, &attr_ascii);
sysdev_create_file(dev, &attr_raw);
}
}
return error;
}
device_initcall(tx_7segled_init_sysfs);

1
arch/mips/txx9/generic/Makefile
View File

@ -10,5 +10,6 @@ obj-$(CONFIG_SOC_TX4938) += mem_tx4927.o setup_tx4938.o irq_tx4938.o
obj-$(CONFIG_SOC_TX4939) += setup_tx4939.o irq_tx4939.o
obj-$(CONFIG_TOSHIBA_FPCIB0) += smsc_fdc37m81x.o
obj-$(CONFIG_SPI) += spi_eeprom.o
obj-$(CONFIG_TXX9_7SEGLED) += 7segled.o
EXTRA_CFLAGS += -Werror

31
arch/mips/txx9/rbtx4939/setup.c
View File

@ -239,6 +239,32 @@ static inline void rbtx4939_led_setup(void)
}
#endif
static void __rbtx4939_7segled_putc(unsigned int pos, unsigned char val)
{
#if defined(CONFIG_LEDS_CLASS) || defined(CONFIG_LEDS_CLASS_MODULE)
unsigned long flags;
local_irq_save(flags);
/* bit7: reserved for LED class */
led_val[pos] = (led_val[pos] & 0x80) | (val & 0x7f);
val = led_val[pos];
local_irq_restore(flags);
#endif
writeb(val, rbtx4939_7seg_addr(pos / 4, pos % 4));
}
static void rbtx4939_7segled_putc(unsigned int pos, unsigned char val)
{
/* convert from map_to_seg7() notation */
val = (val & 0x88) |
((val & 0x40) >> 6) |
((val & 0x20) >> 4) |
((val & 0x10) >> 2) |
((val & 0x04) << 2) |
((val & 0x02) << 4) |
((val & 0x01) << 6);
__rbtx4939_7segled_putc(pos, val);
}
static void __init rbtx4939_arch_init(void)
{
rbtx4939_pci_setup();
@ -269,6 +295,8 @@ static void __init rbtx4939_device_init(void)
static void __init rbtx4939_setup(void)
{
int i;
rbtx4939_ebusc_setup();
/* always enable ATA0 */
txx9_set64(&tx4939_ccfgptr->pcfg, TX4939_PCFG_ATA0MODE);
@ -279,6 +307,9 @@ static void __init rbtx4939_setup(void)
_machine_restart = rbtx4939_machine_restart;
txx9_7segled_init(RBTX4939_MAX_7SEGLEDS, rbtx4939_7segled_putc);
for (i = 0; i < RBTX4939_MAX_7SEGLEDS; i++)
txx9_7segled_putc(i, '-');
pr_info("RBTX4939 (Rev %02x) --- FPGA(Rev %02x) DIPSW:%02x,%02x\n",
readb(rbtx4939_board_rev_addr), readb(rbtx4939_ioc_rev_addr),
readb(rbtx4939_udipsw_addr), readb(rbtx4939_bdipsw_addr));