This is a patch to support VFD on Celleb 2.
VFD is a small LCD to show miscellaneous messages.
Signed-off-by: Kou Ishizaki <[EMAIL PROTECTED]>
---
Index: linux-powerpc-git/arch/powerpc/platforms/celleb/Kconfig
===================================================================
--- linux-powerpc-git.orig/arch/powerpc/platforms/celleb/Kconfig
+++ linux-powerpc-git/arch/powerpc/platforms/celleb/Kconfig
@@ -7,3 +7,9 @@ config PPC_CELLEB
select PPC_UDBG_BEAT
select USB_OHCI_BIG_ENDIAN_MMIO
select USB_EHCI_BIG_ENDIAN_MMIO
+ select PPC_RTAS
+
+config PPC_CELLEB2_INDICATOR
+ tristate "Support for Toshiba's Cell Reference Set 'Celleb 2's VFD"
+ default m
+ depends on PPC_CELLEB
Index: linux-powerpc-git/arch/powerpc/platforms/celleb/Makefile
===================================================================
--- linux-powerpc-git.orig/arch/powerpc/platforms/celleb/Makefile
+++ linux-powerpc-git/arch/powerpc/platforms/celleb/Makefile
@@ -6,3 +6,4 @@ obj-$(CONFIG_SMP) += smp.o
obj-$(CONFIG_PPC_UDBG_BEAT) += udbg_beat.o
obj-$(CONFIG_SERIAL_TXX9) += scc_sio.o
obj-$(CONFIG_SPU_BASE) += spu_priv1.o
+obj-$(CONFIG_PPC_CELLEB2_INDICATOR) += indicator.o
Index: linux-powerpc-git/arch/powerpc/platforms/celleb/indicator.c
===================================================================
--- /dev/null
+++ linux-powerpc-git/arch/powerpc/platforms/celleb/indicator.c
@@ -0,0 +1,202 @@
+/*
+ * LED/VFD support for Celleb
+ *
+ * (C) Copyright 2007 TOSHIBA CORPORATION
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/seq_file.h>
+#include <linux/proc_fs.h>
+#include <linux/of.h>
+#include <linux/delay.h>
+#include <linux/uaccess.h>
+
+#include <asm/rtas.h>
+#include <asm/machdep.h>
+#include <asm/semaphore.h>
+
+static const u32 *display_cols;
+static u32 display_width, display_lines;
+static u32 token_display_character, token_set_indicator;
+static DECLARE_MUTEX(display_lock);
+static DECLARE_MUTEX(indicator_lock);
+
+static int celleb_display_show(struct seq_file *m, void *v)
+{
+ u32 i;
+
+ seq_printf(m, "--- Celleb Subdisplay ---\n");
+ seq_printf(m, "Lines: %u\n", display_lines);
+ if (display_cols)
+ for (i = 0; i < display_lines; i++)
+ seq_printf(m, "Columns(%u): %u\n", i, display_cols[i]);
+ else
+ seq_printf(m, "Columns(All): %u\n", display_width);
+ return 0;
+}
+
+static ssize_t celleb_display_write(struct file *file,
+ const char __user *buf, size_t count, loff_t *ppos)
+{
+ int rc;
+ size_t i;
+ char d;
+
+ rc = down_interruptible(&indicator_lock);
+ if (rc != 0)
+ return rc;
+ for (i = 0; i < count; i++) {
+ rc = get_user(d, &buf[i]);
+ if (rc != 0) {
+ up(&display_lock);
+ return rc;
+ }
+ do {
+ rc = rtas_call(token_display_character, 1, 1, NULL, d);
+ } while (rtas_busy_delay(rc));
+ }
+ up(&display_lock);
+ return i;
+}
+
+static int celleb_display_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, celleb_display_show, NULL);
+}
+
+static int celleb_indicator_show(struct seq_file *m, void *v)
+{
+ return 0;
+}
+
+static ssize_t celleb_indicator_write(struct file *file,
+ const char __user *buf, size_t count, loff_t *ppos)
+{
+ int rc;
+ size_t i;
+ char d;
+
+ rc = down_interruptible(&indicator_lock);
+ if (rc != 0)
+ return rc;
+ for (i = 0; i < count; i++) {
+ rc = get_user(d, &buf[i]);
+ if (rc != 0) {
+ up(&indicator_lock);
+ return rc;
+ }
+ do {
+ rc = rtas_call(token_set_indicator, 1, 1, NULL, d);
+ } while (rtas_busy_delay(rc));
+ }
+ up(&indicator_lock);
+ return i;
+}
+
+static int celleb_indicator_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, celleb_indicator_show, NULL);
+}
+
+const struct file_operations celleb_display_operations = {
+ .open = celleb_display_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .write = celleb_display_write,
+ .release = single_release,
+};
+
+const struct file_operations celleb_indicator_operations = {
+ .open = celleb_indicator_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .write = celleb_indicator_write,
+ .release = single_release,
+};
+
+static int __init celleb_indicator_init(void)
+{
+ struct device_node *rtas_node = NULL;
+ struct proc_dir_entry *entry;
+ const u32 *p;
+
+ if (!machine_is(celleb))
+ return -ENODEV;
+
+ rtas_node = of_find_node_by_name(NULL, "rtas");
+ if (rtas_node == NULL)
+ return -ENODEV;
+
+ display_cols = of_get_property(rtas_node,
+ "ibm,display-truncation-length", NULL);
+ if ((p = of_get_property(rtas_node,
+ "ibm,display-line-length", NULL)) != NULL)
+ display_width = *p;
+ else
+ display_width = 0;
+ if ((p = of_get_property(rtas_node,
+ "ibm,display-number-of-lines", NULL)) != NULL)
+ display_lines = *p;
+ else
+ display_lines = 0;
+
+ if ((p = of_get_property(rtas_node,
+ "display-character", NULL)) != NULL)
+ token_display_character = *p;
+ else
+ token_display_character = 0;
+
+ if ((p = of_get_property(rtas_node,
+ "set-indicator", NULL)) != NULL)
+ token_set_indicator = *p;
+ else
+ token_set_indicator = 0;
+
+ if (token_display_character != 0
+ && display_lines != 0
+ && (display_width != 0 || display_cols)) {
+ entry = create_proc_entry("ppc64/rtas/toshiba,display",
+ S_IRUGO|S_IWUSR, NULL);
+ if (entry)
+ entry->proc_fops = &celleb_display_operations;
+ }
+
+ if (token_set_indicator != 0) {
+ entry = create_proc_entry("ppc64/rtas/toshiba,indicator",
+ S_IRUGO|S_IWUSR, NULL);
+ if (entry)
+ entry->proc_fops = &celleb_indicator_operations;
+ }
+ of_node_put(rtas_node);
+
+ return 0;
+}
+
+static void __exit celleb_indicator_exit(void)
+{
+ remove_proc_entry("ppc64/rtas/toshiba,display", NULL);
+ remove_proc_entry("ppc64/rtas/toshiba,indicator", NULL);
+}
+
+module_init(celleb_indicator_init);
+module_exit(celleb_indicator_exit);
+MODULE_AUTHOR("Toshiba Corporation");
+MODULE_DESCRIPTION("VFD/LED support for Toshiba Cell Reference Set");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("1.0");
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