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>
diff --git a/arch/mips/include/asm/txx9/generic.h b/arch/mips/include/asm/txx9/generic.h
index 4316a3e..9cde009 100644
--- a/arch/mips/include/asm/txx9/generic.h
+++ b/arch/mips/include/asm/txx9/generic.h
@@ -86,4 +86,9 @@
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 */
diff --git a/arch/mips/txx9/Kconfig b/arch/mips/txx9/Kconfig
index 17052db..5a176ea 100644
--- a/arch/mips/txx9/Kconfig
+++ b/arch/mips/txx9/Kconfig
@@ -49,6 +49,7 @@
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 @@
select HW_HAS_PCI
select PCI_TX4927
+config TXX9_7SEGLED
+ bool
+
config TOSHIBA_FPCIB0
bool "FPCIB0 Backplane Support"
depends on PCI && MACH_TXX9
diff --git a/arch/mips/txx9/generic/7segled.c b/arch/mips/txx9/generic/7segled.c
new file mode 100644
index 0000000..727ab21
--- /dev/null
+++ b/arch/mips/txx9/generic/7segled.c
@@ -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);
diff --git a/arch/mips/txx9/generic/Makefile b/arch/mips/txx9/generic/Makefile
index 0030d23..f2579ce 100644
--- a/arch/mips/txx9/generic/Makefile
+++ b/arch/mips/txx9/generic/Makefile
@@ -10,5 +10,6 @@
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
diff --git a/arch/mips/txx9/rbtx4939/setup.c b/arch/mips/txx9/rbtx4939/setup.c
index 9855d7b..c885177 100644
--- a/arch/mips/txx9/rbtx4939/setup.c
+++ b/arch/mips/txx9/rbtx4939/setup.c
@@ -239,6 +239,32 @@
}
#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_setup(void)
{
+ int i;
+
rbtx4939_ebusc_setup();
/* always enable ATA0 */
txx9_set64(&tx4939_ccfgptr->pcfg, TX4939_PCFG_ATA0MODE);
@@ -279,6 +307,9 @@
_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));