1/* sunxvr2500.c: Sun 3DLABS XVR-2500 et al. fb driver for sparc64 systems
2 *
3 * License: GPL
4 *
5 * Copyright (C) 2007 David S. Miller (davem@davemloft.net)
6 */
7
8#include <linux/kernel.h>
9#include <linux/fb.h>
10#include <linux/pci.h>
11#include <linux/init.h>
12#include <linux/of_device.h>
13
14#include <asm/io.h>
15
16struct s3d_info {
17	struct fb_info		*info;
18	struct pci_dev		*pdev;
19
20	char __iomem		*fb_base;
21	unsigned long		fb_base_phys;
22
23	struct device_node	*of_node;
24
25	unsigned int		width;
26	unsigned int		height;
27	unsigned int		depth;
28	unsigned int		fb_size;
29
30	u32			pseudo_palette[16];
31};
32
33static int s3d_get_props(struct s3d_info *sp)
34{
35	sp->width = of_getintprop_default(sp->of_node, "width", 0);
36	sp->height = of_getintprop_default(sp->of_node, "height", 0);
37	sp->depth = of_getintprop_default(sp->of_node, "depth", 8);
38
39	if (!sp->width || !sp->height) {
40		printk(KERN_ERR "s3d: Critical properties missing for %s\n",
41		       pci_name(sp->pdev));
42		return -EINVAL;
43	}
44
45	return 0;
46}
47
48static int s3d_setcolreg(unsigned regno,
49			 unsigned red, unsigned green, unsigned blue,
50			 unsigned transp, struct fb_info *info)
51{
52	u32 value;
53
54	if (regno < 16) {
55		red >>= 8;
56		green >>= 8;
57		blue >>= 8;
58
59		value = (blue << 24) | (green << 16) | (red << 8);
60		((u32 *)info->pseudo_palette)[regno] = value;
61	}
62
63	return 0;
64}
65
66static const struct fb_ops s3d_ops = {
67	.owner			= THIS_MODULE,
68	.fb_setcolreg		= s3d_setcolreg,
69	.fb_fillrect		= cfb_fillrect,
70	.fb_copyarea		= cfb_copyarea,
71	.fb_imageblit		= cfb_imageblit,
72};
73
74static int s3d_set_fbinfo(struct s3d_info *sp)
75{
76	struct fb_info *info = sp->info;
77	struct fb_var_screeninfo *var = &info->var;
78
79	info->flags = FBINFO_DEFAULT;
80	info->fbops = &s3d_ops;
81	info->screen_base = sp->fb_base;
82	info->screen_size = sp->fb_size;
83
84	info->pseudo_palette = sp->pseudo_palette;
85
86	/* Fill fix common fields */
87	strlcpy(info->fix.id, "s3d", sizeof(info->fix.id));
88        info->fix.smem_start = sp->fb_base_phys;
89        info->fix.smem_len = sp->fb_size;
90        info->fix.type = FB_TYPE_PACKED_PIXELS;
91	if (sp->depth == 32 || sp->depth == 24)
92		info->fix.visual = FB_VISUAL_TRUECOLOR;
93	else
94		info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
95
96	var->xres = sp->width;
97	var->yres = sp->height;
98	var->xres_virtual = var->xres;
99	var->yres_virtual = var->yres;
100	var->bits_per_pixel = sp->depth;
101
102	var->red.offset = 8;
103	var->red.length = 8;
104	var->green.offset = 16;
105	var->green.length = 8;
106	var->blue.offset = 24;
107	var->blue.length = 8;
108	var->transp.offset = 0;
109	var->transp.length = 0;
110
111	if (fb_alloc_cmap(&info->cmap, 256, 0)) {
112		printk(KERN_ERR "s3d: Cannot allocate color map.\n");
113		return -ENOMEM;
114	}
115
116        return 0;
117}
118
119static int s3d_pci_register(struct pci_dev *pdev,
120			    const struct pci_device_id *ent)
121{
122	struct fb_info *info;
123	struct s3d_info *sp;
124	int err;
125
126	err = pci_enable_device(pdev);
127	if (err < 0) {
128		printk(KERN_ERR "s3d: Cannot enable PCI device %s\n",
129		       pci_name(pdev));
130		goto err_out;
131	}
132
133	info = framebuffer_alloc(sizeof(struct s3d_info), &pdev->dev);
134	if (!info) {
135		err = -ENOMEM;
136		goto err_disable;
137	}
138
139	sp = info->par;
140	sp->info = info;
141	sp->pdev = pdev;
142	sp->of_node = pci_device_to_OF_node(pdev);
143	if (!sp->of_node) {
144		printk(KERN_ERR "s3d: Cannot find OF node of %s\n",
145		       pci_name(pdev));
146		err = -ENODEV;
147		goto err_release_fb;
148	}
149
150	sp->fb_base_phys = pci_resource_start (pdev, 1);
151
152	err = pci_request_region(pdev, 1, "s3d framebuffer");
153	if (err < 0) {
154		printk("s3d: Cannot request region 1 for %s\n",
155		       pci_name(pdev));
156		goto err_release_fb;
157	}
158
159	err = s3d_get_props(sp);
160	if (err)
161		goto err_release_pci;
162
163	/* XXX 'linebytes' is often wrong, it is equal to the width
164	 * XXX with depth of 32 on my XVR-2500 which is clearly not
165	 * XXX right.  So we don't try to use it.
166	 */
167	switch (sp->depth) {
168	case 8:
169		info->fix.line_length = sp->width;
170		break;
171	case 16:
172		info->fix.line_length = sp->width * 2;
173		break;
174	case 24:
175		info->fix.line_length = sp->width * 3;
176		break;
177	case 32:
178		info->fix.line_length = sp->width * 4;
179		break;
180	}
181	sp->fb_size = info->fix.line_length * sp->height;
182
183	sp->fb_base = ioremap(sp->fb_base_phys, sp->fb_size);
184	if (!sp->fb_base) {
185		err = -ENOMEM;
186		goto err_release_pci;
187	}
188
189	err = s3d_set_fbinfo(sp);
190	if (err)
191		goto err_unmap_fb;
192
193	pci_set_drvdata(pdev, info);
194
195	printk("s3d: Found device at %s\n", pci_name(pdev));
196
197	err = register_framebuffer(info);
198	if (err < 0) {
199		printk(KERN_ERR "s3d: Could not register framebuffer %s\n",
200		       pci_name(pdev));
201		goto err_unmap_fb;
202	}
203
204	return 0;
205
206err_unmap_fb:
207	iounmap(sp->fb_base);
208
209err_release_pci:
210	pci_release_region(pdev, 1);
211
212err_release_fb:
213        framebuffer_release(info);
214
215err_disable:
216	pci_disable_device(pdev);
217
218err_out:
219	return err;
220}
221
222static const struct pci_device_id s3d_pci_table[] = {
223	{	PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x002c),	},
224	{	PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x002d),	},
225	{	PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x002e),	},
226	{	PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x002f),	},
227	{	PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x0030),	},
228	{	PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x0031),	},
229	{	PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x0032),	},
230	{	PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x0033),	},
231	{ 0, }
232};
233
234static struct pci_driver s3d_driver = {
235	.driver = {
236		.suppress_bind_attrs = true,
237	},
238	.name		= "s3d",
239	.id_table	= s3d_pci_table,
240	.probe		= s3d_pci_register,
241};
242
243static int __init s3d_init(void)
244{
245	if (fb_get_options("s3d", NULL))
246		return -ENODEV;
247
248	return pci_register_driver(&s3d_driver);
249}
250device_initcall(s3d_init);
251