From 340435b03e9d73597833e922a736fd7ed61d58ff Mon Sep 17 00:00:00 2001
From: Marcin Chrzanowski <marcin.j.chrzanowski@gmail.com>
Date: Wed, 23 May 2018 00:12:48 +0200
Subject: Implement draw_line command

---
 harddoomdev.c | 73 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++--
 harddoomdev.h |  9 ++++++++
 2 files changed, 80 insertions(+), 2 deletions(-)

diff --git a/harddoomdev.c b/harddoomdev.c
index 00ef6f7..e4f6e80 100644
--- a/harddoomdev.c
+++ b/harddoomdev.c
@@ -4,6 +4,7 @@
 #include "doomcode.h"
 #include "pci.h"
 #include "private_data.h"
+#include "util.h"
 
 void doomdev_write(void __iomem *iomem, size_t addr, uint32_t data)
 {
@@ -15,6 +16,73 @@ uint32_t doomdev_read(void __iomem *iomem, size_t addr)
 	return ioread32(iomem + addr);
 }
 
+void write_command(void __iomem *iomem, uint32_t command)
+{
+	doomdev_write(iomem, HARDDOOM_FIFO_SEND, command);
+}
+
+void send_command(void __iomem *iomem, uint32_t command)
+{
+	while (doomdev_read(iomem, HARDDOOM_FIFO_FREE) == 0) {}
+
+	write_command(iomem, command);
+}
+
+uint32_t get_interrupts(void __iomem *iomem)
+{
+	return doomdev_read(iomem, HARDDOOM_INTR);
+}
+
+void deactivate_intr(void __iomem *iomem, uint32_t intr)
+{
+	doomdev_write(iomem, HARDDOOM_INTR, intr);
+}
+
+void ping_sync(void __iomem *iomem)
+{
+	send_command(iomem, HARDDOOM_CMD_PING_SYNC);
+}
+
+void set_surf_dst_pt(void __iomem *iomem, dma_addr_t page_table)
+{
+	send_command(iomem, HARDDOOM_CMD_SURF_DST_PT(page_table));
+}
+
+void set_surf_dims(void __iomem *iomem, uint32_t width, uint32_t height)
+{
+	send_command(iomem, HARDDOOM_CMD_SURF_DIMS(width, height));
+}
+
+void set_xy_a(void __iomem *iomem, uint16_t x, uint16_t y)
+{
+	send_command(iomem, HARDDOOM_CMD_XY_A(x, y));
+}
+
+void set_xy_b(void __iomem *iomem, uint16_t x, uint16_t y)
+{
+	send_command(iomem, HARDDOOM_CMD_XY_B(x, y));
+}
+
+void set_fill_color(void __iomem *iomem, uint8_t color)
+{
+	send_command(iomem, HARDDOOM_CMD_FILL_COLOR(color));
+}
+
+void draw_line(struct surface_data *surface_data, struct doomdev_line line)
+{
+	void __iomem *iomem;
+
+	iomem = surface_data->doom_data->iomem;
+
+	set_surf_dst_pt(iomem, surface_data->page_table_dev);
+	set_surf_dims(iomem, surface_data->width, surface_data->height);
+	set_xy_a(iomem, line.pos_a_x, line.pos_a_y);
+	set_xy_b(iomem, line.pos_b_x, line.pos_b_y);
+	set_fill_color(iomem, line.color);
+
+	send_command(iomem, HARDDOOM_CMD_DRAW_LINE);
+}
+
 uint32_t doomdev_read_stat(void __iomem *iomem, size_t stat)
 {
 	return doomdev_read(iomem, HARDDOOM_STATS(stat));
@@ -29,7 +97,7 @@ void load_microcode(void __iomem *iomem)
 		doomdev_write(iomem, HARDDOOM_FE_CODE_WINDOW, doomcode[i]);
 	}
 }
-	
+
 void start_dev(struct pci_dev *dev)
 {
 	struct doom_data *data;
@@ -40,7 +108,8 @@ void start_dev(struct pci_dev *dev)
 
 	load_microcode(iomem);
 	doomdev_write(iomem, HARDDOOM_RESET, 0xffffffe);
-	doomdev_write(iomem, HARDDOOM_INTR, 0x3ff);
+	doomdev_write(iomem, HARDDOOM_INTR, HARDDOOM_INTR_MASK);
+	doomdev_write(iomem, HARDDOOM_INTR_ENABLE, HARDDOOM_INTR_MASK);
 	doomdev_write(iomem, HARDDOOM_ENABLE,
 			HARDDOOM_ENABLE_ALL ^ HARDDOOM_ENABLE_FETCH_CMD);
 }
diff --git a/harddoomdev.h b/harddoomdev.h
index da8dfe1..a2c997a 100644
--- a/harddoomdev.h
+++ b/harddoomdev.h
@@ -3,7 +3,16 @@
 
 #include <linux/pci.h>
 
+#include "doomdev.h"
+#include "private_data.h"
+
 void start_dev(struct pci_dev *dev);
 void shutdown_dev(struct pci_dev *dev);
 
+uint32_t get_interrupts(void __iomem *iomem);
+void deactivate_intr(void __iomem *iomem, uint32_t intr);
+void ping_sync(void __iomem *iomem);
+
+void draw_line(struct surface_data *surface_data, struct doomdev_line line);
+
 #endif
-- 
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