Re: [PATCH] geode updates.

[David Vrabel <dvrabel@arcom.com>]

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James Simmons wrote:
> Okay I see what you meant. So what I did was create two hardware devices. 
> One a pci device for the Cyrix video so it will show up in the sysfs pci 
> tree. A second platform device for the embedded geode GX processsor.

You'll hate me for this but I've changed my mind...  I think making it a
single PCI driver is best because:

1. PCI devices can be autodetected etc. but platform devices can't.
2. Having the platform and pci driver is extra complexity for no
practical benefit.
3. The framebuffer memory is a pci resource in BAR0 of the cs5530 video
device anyway.

Attached is a tested patch that does this (based on one of your previous
patches).

David Vrabel
-- 
David Vrabel, Design Engineer

Arcom, Clifton Road           Tel: +44 (0)1223 411200 ext. 3233
Cambridge CB1 7EA, UK         Web: http://www.arcom.com/

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Geode framebuffer driver updates:
  - Local mode list (taken from modedb.c) containing only relevant modes. This
    also makes the driver work as a module.
  - Make it a PCI driver (from James Simmons <jsimmons@infradead.org>).
  - A few other minor cosmetic bits and pieces.

Signed-off-by: David Vrabel <dvrabel@arcom.com>

Index: linux-2.6-working/drivers/video/geode/geodefb.h
===================================================================
--- linux-2.6-working.orig/drivers/video/geode/geodefb.h	2005-08-17 10:33:33.000000000 +0100
+++ linux-2.6-working/drivers/video/geode/geodefb.h	2005-08-17 10:34:03.000000000 +0100
@@ -29,7 +29,6 @@
 	int enable_crt;
 	int panel_x; /* dimensions of an attached flat panel, non-zero => enable panel */
 	int panel_y;
-	struct pci_dev *vid_dev;
 	void __iomem *dc_regs;
 	void __iomem *vid_regs;
 	struct geode_dc_ops  *dc_ops;
Index: linux-2.6-working/drivers/video/geode/gx1fb_core.c
===================================================================
--- linux-2.6-working.orig/drivers/video/geode/gx1fb_core.c	2005-08-17 10:33:33.000000000 +0100
+++ linux-2.6-working/drivers/video/geode/gx1fb_core.c	2005-08-17 12:59:21.000000000 +0100
@@ -30,6 +30,62 @@
 static int  crt_option = 1;
 static char panel_option[32] = "";
 
+/* Modes relevant to the GX1 (taken from modedb.c) */
+static const struct fb_videomode __initdata gx1_modedb[] = {
+	/* 640x480-60 VESA */
+	{ NULL, 60, 640, 480, 39682,  48, 16, 33, 10, 96, 2,
+	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
+	/* 640x480-75 VESA */
+	{ NULL, 75, 640, 480, 31746, 120, 16, 16, 01, 64, 3,
+	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
+	/* 640x480-85 VESA */
+	{ NULL, 85, 640, 480, 27777, 80, 56, 25, 01, 56, 3,
+	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
+	/* 800x600-60 VESA */
+	{ NULL, 60, 800, 600, 25000, 88, 40, 23, 01, 128, 4,
+	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
+	/* 800x600-75 VESA */
+	{ NULL, 75, 800, 600, 20202, 160, 16, 21, 01, 80, 3,
+	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
+	/* 800x600-85 VESA */
+	{ NULL, 85, 800, 600, 17761, 152, 32, 27, 01, 64, 3,
+	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
+	/* 1024x768-60 VESA */
+	{ NULL, 60, 1024, 768, 15384, 160, 24, 29, 3, 136, 6,
+	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
+	/* 1024x768-75 VESA */
+	{ NULL, 75, 1024, 768, 12690, 176, 16, 28, 1, 96, 3,
+	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
+	/* 1024x768-85 VESA */
+	{ NULL, 85, 1024, 768, 10582, 208, 48, 36, 1, 96, 3,
+	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
+	/* 1280x960-60 VESA */
+	{ NULL, 60, 1280, 960, 9259, 312, 96, 36, 1, 112, 3,
+	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
+	/* 1280x960-85 VESA */
+	{ NULL, 85, 1280, 960, 6734, 224, 64, 47, 1, 160, 3,
+	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
+	/* 1280x1024-60 VESA */
+	{ NULL, 60, 1280, 1024, 9259, 248, 48, 38, 1, 112, 3,
+	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
+	/* 1280x1024-75 VESA */
+	{ NULL, 75, 1280, 1024, 7407, 248, 16, 38, 1, 144, 3,
+	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
+	/* 1280x1024-85 VESA */
+	{ NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
+	  FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	  FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
+};
+
 static int gx1_line_delta(int xres, int bpp)
 {
 	int line_delta = xres * (bpp >> 3);
@@ -47,8 +103,6 @@
 {
 	struct geodefb_par *par = info->par;
 
-	printk(KERN_DEBUG "%s()\n", __FUNCTION__);
-
 	/* Maximum resolution is 1280x1024. */
 	if (var->xres > 1280 || var->yres > 1024)
 		return -EINVAL;
@@ -146,40 +200,48 @@
 	return par->vid_ops->blank_display(info, blank_mode);
 }
 
-static int __init gx1fb_map_video_memory(struct fb_info *info)
+static int __init gx1fb_map_video_memory(struct fb_info *info, struct pci_dev *dev)
 {
 	struct geodefb_par *par = info->par;
 	unsigned gx_base;
 	int fb_len;
+	int ret;
 
 	gx_base = gx1_gx_base();
 	if (!gx_base)
 		return -ENODEV;
 
-	par->vid_dev = pci_get_device(PCI_VENDOR_ID_CYRIX,
-				      PCI_DEVICE_ID_CYRIX_5530_VIDEO, NULL);
-	if (!par->vid_dev)
-		return -ENODEV;
-
-	par->vid_regs = ioremap(pci_resource_start(par->vid_dev, 1),
-				pci_resource_len(par->vid_dev, 1));
+	ret = pci_enable_device(dev);
+	if (ret < 0)
+		return ret;
+
+	ret = pci_request_region(dev, 1, "gx1fb (video)");
+	if (ret < 0)
+		return ret;
+	par->vid_regs = ioremap(pci_resource_start(dev, 1),
+				pci_resource_len(dev, 1));
 	if (!par->vid_regs)
 		return -ENOMEM;
 
+	if (!request_mem_region(gx_base + 0x8300, 0x100, "gx1fb (display controller)"))
+		return -EBUSY;
 	par->dc_regs = ioremap(gx_base + 0x8300, 0x100);
 	if (!par->dc_regs)
 		return -ENOMEM;
 
-	info->fix.smem_start = gx_base + 0x800000;
+	ret = pci_request_region(dev, 0, "gx1fb (frame buffer)");
+	if (ret < 0 )
+		return -EBUSY;
 	if ((fb_len = gx1_frame_buffer_size()) < 0)
 		return -ENOMEM;
+	info->fix.smem_start = pci_resource_start(dev, 0);
 	info->fix.smem_len = fb_len;
 	info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
 	if (!info->screen_base)
 		return -ENOMEM;
 
-	printk(KERN_INFO "%s: %d Kibyte of video memory at 0x%lx\n",
-	       info->fix.id, info->fix.smem_len / 1024, info->fix.smem_start);
+	dev_info(&dev->dev, "%d Kibyte of video memory at 0x%lx\n",
+		 info->fix.smem_len / 1024, info->fix.smem_start);
 
 	return 0;
 }
@@ -216,13 +278,13 @@
 	.fb_cursor	= soft_cursor,
 };
 
-static struct fb_info * __init gx1fb_init_fbinfo(void)
+static struct fb_info * __init gx1fb_init_fbinfo(struct device *dev)
 {
-	struct fb_info *info;
 	struct geodefb_par *par;
-
+	struct fb_info *info;
+	
 	/* Alloc enough space for the pseudo palette. */
-	info = framebuffer_alloc(sizeof(struct geodefb_par) + sizeof(u32) * 16, NULL);
+	info = framebuffer_alloc(sizeof(struct geodefb_par) + sizeof(u32) * 16, dev);
 	if (!info)
 		return NULL;
 
@@ -255,47 +317,37 @@
 	/* CRT and panel options */
 	par->enable_crt = crt_option;
 	if (parse_panel_option(info) < 0)
-		printk(KERN_WARNING "%s: invalid 'panel' option -- disabling flat panel\n",
-		       info->fix.id);
+		printk(KERN_WARNING "gx1fb: invalid 'panel' option -- disabling flat panel\n");
 	if (!par->panel_x)
 		par->enable_crt = 1; /* fall back to CRT if no panel is specified */
 
 	return info;
 }
 
-
-static struct fb_info *gx1fb_info;
-
-static int __init gx1fb_init(void)
+static int __init gx1fb_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 {
+	struct geodefb_par *par;
 	struct fb_info *info;
-        struct geodefb_par *par;
 	int ret;
 
-#ifndef MODULE
-	if (fb_get_options("gx1fb", NULL))
-		return -ENODEV;
-#endif
-
-	info = gx1fb_init_fbinfo();
+	info = gx1fb_init_fbinfo(&pdev->dev);
 	if (!info)
 		return -ENOMEM;
-	gx1fb_info = info;
-
 	par = info->par;
 
 	/* GX1 display controller and CS5530 video device */
 	par->dc_ops  = &gx1_dc_ops;
 	par->vid_ops = &cs5530_vid_ops;
 
-	if ((ret = gx1fb_map_video_memory(info)) < 0) {
-		printk(KERN_ERR "%s: gx1fb_map_video_memory() failed\n", info->fix.id);
+	if ((ret = gx1fb_map_video_memory(info, pdev)) < 0) {
+		dev_err(&pdev->dev, "failed to map frame buffer or controller registers\n");
 		goto err;
 	}
 
-	ret = fb_find_mode(&info->var, info, mode_option, NULL, 0, NULL, 16);
+	ret = fb_find_mode(&info->var, info, mode_option,
+			   gx1_modedb, ARRAY_SIZE(gx1_modedb), NULL, 16);
 	if (ret == 0 || ret == 4) {
-		printk(KERN_ERR "%s: could not find valid video mode\n", info->fix.id);
+		dev_err(&pdev->dev, "could not find valid video mode\n");
 		ret = -EINVAL;
 		goto err;
 	}
@@ -310,39 +362,83 @@
 		ret = -EINVAL;
 		goto err;
 	}
+	pci_set_drvdata(pdev, info);
 	printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node, info->fix.id);
 	return 0;
 
   err:
-	if (info->screen_base)
+	if (info->screen_base) {
 		iounmap(info->screen_base);
-	if (par->vid_regs)
+		pci_release_region(pdev, 0);
+	}
+	if (par->vid_regs) {
 		iounmap(par->vid_regs);
-	if (par->dc_regs)
+		pci_release_region(pdev, 1);
+	}
+	if (par->dc_regs) {
 		iounmap(par->dc_regs);
-	if (par->vid_dev)
-		pci_dev_put(par->vid_dev);
+		release_mem_region(gx1_gx_base() + 0x8300, 0x100);
+	}
+
+	pci_disable_device(pdev);
+	
 	if (info)
 		framebuffer_release(info);
 	return ret;
 }
 
-static void __exit gx1fb_cleanup(void)
+static void gx1fb_remove(struct pci_dev *pdev)
 {
-	struct fb_info *info = gx1fb_info;
-	struct geodefb_par *par = gx1fb_info->par;
+	struct fb_info *info = pci_get_drvdata(pdev);
+	struct geodefb_par *par = info->par;
 
 	unregister_framebuffer(info);
 
 	iounmap((void __iomem *)info->screen_base);
+	pci_release_region(pdev, 0);
+
 	iounmap(par->vid_regs);
+	pci_release_region(pdev, 1);
+
 	iounmap(par->dc_regs);
+	release_mem_region(gx1_gx_base() + 0x8300, 0x100);
 
-	pci_dev_put(par->vid_dev);
+	pci_disable_device(pdev);
+	pci_set_drvdata(pdev, NULL);
 
 	framebuffer_release(info);
 }
 
+static struct pci_device_id gx1fb_id_table[] = {
+	{ PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_VIDEO,
+	  PCI_ANY_ID, PCI_ANY_ID, PCI_BASE_CLASS_DISPLAY << 16,
+	  0xff0000, 0 },
+	{ 0, }
+};
+
+MODULE_DEVICE_TABLE(pci, gx1fb_id_table);
+
+static struct pci_driver gx1fb_driver = {
+	.name		= "gx1fb",
+	.id_table	= gx1fb_id_table,
+	.probe		= gx1fb_probe,
+	.remove		= gx1fb_remove,
+};
+
+static int __init gx1fb_init(void)
+{
+#ifndef MODULE
+	if (fb_get_options("gx1fb", NULL))
+		return -ENODEV;
+#endif
+	return pci_register_driver(&gx1fb_driver);
+}
+
+static void __exit gx1fb_cleanup(void)
+{
+	pci_unregister_driver(&gx1fb_driver);
+}
+
 module_init(gx1fb_init);
 module_exit(gx1fb_cleanup);
 
Index: linux-2.6-working/drivers/video/geode/Kconfig
===================================================================
--- linux-2.6-working.orig/drivers/video/geode/Kconfig	2005-08-17 10:33:33.000000000 +0100
+++ linux-2.6-working/drivers/video/geode/Kconfig	2005-08-17 10:34:03.000000000 +0100
@@ -21,9 +21,7 @@
 	  Framebuffer driver for the display controller integrated into the
 	  AMD Geode GX1 processor.
 
-	  This driver is also available as a module ( = code which can be
-	  inserted and removed from the running kernel whenever you want). The
-	  module will be called gx1fb. If you want to compile it as a module,
-	  say M here and read <file:Documentation/modules.txt>.
+	  To compile this driver as a module, choose M here: the module will be
+	  called gx1fb.
 
 	  If unsure, say N.
Index: linux-2.6-working/drivers/video/geode/video_cs5530.c
===================================================================
--- linux-2.6-working.orig/drivers/video/geode/video_cs5530.c	2005-08-17 10:33:33.000000000 +0100
+++ linux-2.6-working/drivers/video/geode/video_cs5530.c	2005-08-17 10:34:03.000000000 +0100
@@ -69,8 +69,6 @@
 	{  4310, 0x2FB1B802, }, /* 232.0000 */
 };
 
-#define NUM_CS5530_FREQUENCIES sizeof(cs5530_pll_table)/sizeof(struct cs5530_pll_entry)
-
 static void cs5530_set_dclk_frequency(struct fb_info *info)
 {
 	struct geodefb_par *par = info->par;
@@ -82,7 +80,7 @@
 	value = cs5530_pll_table[0].pll_value;
 	min = cs5530_pll_table[0].pixclock - info->var.pixclock;
 	if (min < 0) min = -min;
-	for (i = 1; i < NUM_CS5530_FREQUENCIES; i++) {
+	for (i = 1; i < ARRAY_SIZE(cs5530_pll_table); i++) {
 		diff = cs5530_pll_table[i].pixclock - info->var.pixclock;
 		if (diff < 0L) diff = -diff;
 		if (diff < min) {