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Commit bc89b2bd authored by Atsushi Nemoto's avatar Atsushi Nemoto Committed by Ralf Baechle
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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: default avatarAtsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent f591eb1e

arch/mips/include/asm/txx9/generic.h

+5 −0
Original line number Diff line number Diff line
@@ -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 */

arch/mips/txx9/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -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

arch/mips/txx9/generic/7segled.c

0 → 100644
+112 −0
Original line number Diff line number Diff line 
/*

 * 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);

arch/mips/txx9/generic/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -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

arch/mips/txx9/rbtx4939/setup.c

+31 −0
Original line number Diff line number Diff line
@@ -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));