[ARM] 3572/1: netX: framebuffer driver for Hilscher netX

Patch from Sascha Hauer

This patch adds framebuffer support for Hilscher's netX network
processors.

Signed-off-by: Robert Schwebel <r.schwebel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 114 insertions, 0 deletions

diff --git a/arch/arm/mach-netx/fb.c b/arch/arm/mach-netx/fb.c
new file mode 100644
index 000000000000..e169b683e4de
--- /dev/null
+++ b/arch/arm/mach-netx/fb.c
@@ -0,0 +1,114 @@
+/*
+ * arch/arm/mach-netx/fb.c
+ *
+ * Copyright (c) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/dma-mapping.h>
+#include <linux/amba/bus.h>
+#include <linux/amba/clcd.h>
+
+#include <asm/arch/netx-regs.h>
+#include <asm/arch/hardware.h>
+
+struct clk {};
+
+static struct clk fb_clk;
+
+static struct clcd_panel *netx_panel;
+
+void netx_clcd_enable(struct clcd_fb *fb)
+{
+}
+
+int netx_clcd_setup(struct clcd_fb *fb)
+{
+	dma_addr_t dma;
+
+	fb->panel = netx_panel;
+
+	fb->fb.screen_base = dma_alloc_writecombine(&fb->dev->dev, 1024*1024,
+						    &dma, GFP_KERNEL);
+	if (!fb->fb.screen_base) {
+		printk(KERN_ERR "CLCD: unable to map framebuffer\n");
+		return -ENOMEM;
+	}
+
+	fb->fb.fix.smem_start	= dma;
+	fb->fb.fix.smem_len	= 1024*1024;
+
+	return 0;
+}
+
+int netx_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)
+{
+	return dma_mmap_writecombine(&fb->dev->dev, vma,
+				     fb->fb.screen_base,
+				     fb->fb.fix.smem_start,
+				     fb->fb.fix.smem_len);
+}
+
+void netx_clcd_remove(struct clcd_fb *fb)
+{
+	dma_free_writecombine(&fb->dev->dev, fb->fb.fix.smem_len,
+			      fb->fb.screen_base, fb->fb.fix.smem_start);
+}
+
+void clk_disable(struct clk *clk)
+{
+}
+
+int clk_set_rate(struct clk *clk, unsigned long rate)
+{
+	return 0;
+}
+
+int clk_enable(struct clk *clk)
+{
+	return 0;
+}
+
+struct clk *clk_get(struct device *dev, const char *id)
+{
+	return &fb_clk;
+}
+
+void clk_put(struct clk *clk)
+{
+}
+
+static struct amba_device fb_device = {
+	.dev		= {
+		.bus_id	= "fb",
+		.coherent_dma_mask = ~0,
+	},
+	.res		= {
+		.start	= 0x00104000,
+		.end	= 0x00104fff,
+		.flags	= IORESOURCE_MEM,
+	},
+	.irq		= { NETX_IRQ_LCD, NO_IRQ },
+	.periphid	= 0x10112400,
+};
+
+int netx_fb_init(struct clcd_board *board, struct clcd_panel *panel)
+{
+	netx_panel = panel;
+	fb_device.dev.platform_data = board;
+	return amba_device_register(&fb_device, &iomem_resource);
+}