sunxvr2500.c

  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/aperture.h>
  9#include <linux/kernel.h>
 10#include <linux/fb.h>
 11#include <linux/pci.h>
 12#include <linux/init.h>
 13#include <linux/of.h>
 14
 15#include <asm/io.h>
 16
 17struct s3d_info {
 18	struct fb_info		*info;
 19	struct pci_dev		*pdev;
 20
 21	char __iomem		*fb_base;
 22	unsigned long		fb_base_phys;
 23
 24	struct device_node	*of_node;
 25
 26	unsigned int		width;
 27	unsigned int		height;
 28	unsigned int		depth;
 29	unsigned int		fb_size;
 30
 31	u32			pseudo_palette[16];
 32};
 33
 34static int s3d_get_props(struct s3d_info *sp)
 35{
 36	sp->width = of_getintprop_default(sp->of_node, "width", 0);
 37	sp->height = of_getintprop_default(sp->of_node, "height", 0);
 38	sp->depth = of_getintprop_default(sp->of_node, "depth", 8);
 39
 40	if (!sp->width || !sp->height) {
 41		printk(KERN_ERR "s3d: Critical properties missing for %s\n",
 42		       pci_name(sp->pdev));
 43		return -EINVAL;
 44	}
 45
 46	return 0;
 47}
 48
 49static int s3d_setcolreg(unsigned regno,
 50			 unsigned red, unsigned green, unsigned blue,
 51			 unsigned transp, struct fb_info *info)
 52{
 53	u32 value;
 54
 55	if (regno < 16) {
 56		red >>= 8;
 57		green >>= 8;
 58		blue >>= 8;
 59
 60		value = (blue << 24) | (green << 16) | (red << 8);
 61		((u32 *)info->pseudo_palette)[regno] = value;
 62	}
 63
 64	return 0;
 65}
 66
 67static const struct fb_ops s3d_ops = {
 68	.owner			= THIS_MODULE,
 69	FB_DEFAULT_IOMEM_OPS,
 70	.fb_setcolreg		= s3d_setcolreg,
 71};
 72
 73static int s3d_set_fbinfo(struct s3d_info *sp)
 74{
 75	struct fb_info *info = sp->info;
 76	struct fb_var_screeninfo *var = &info->var;
 77
 78	info->fbops = &s3d_ops;
 79	info->screen_base = sp->fb_base;
 80	info->screen_size = sp->fb_size;
 81
 82	info->pseudo_palette = sp->pseudo_palette;
 83
 84	/* Fill fix common fields */
 85	strscpy(info->fix.id, "s3d", sizeof(info->fix.id));
 86        info->fix.smem_start = sp->fb_base_phys;
 87        info->fix.smem_len = sp->fb_size;
 88        info->fix.type = FB_TYPE_PACKED_PIXELS;
 89	if (sp->depth == 32 || sp->depth == 24)
 90		info->fix.visual = FB_VISUAL_TRUECOLOR;
 91	else
 92		info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
 93
 94	var->xres = sp->width;
 95	var->yres = sp->height;
 96	var->xres_virtual = var->xres;
 97	var->yres_virtual = var->yres;
 98	var->bits_per_pixel = sp->depth;
 99
100	var->red.offset = 8;
101	var->red.length = 8;
102	var->green.offset = 16;
103	var->green.length = 8;
104	var->blue.offset = 24;
105	var->blue.length = 8;
106	var->transp.offset = 0;
107	var->transp.length = 0;
108
109	if (fb_alloc_cmap(&info->cmap, 256, 0)) {
110		printk(KERN_ERR "s3d: Cannot allocate color map.\n");
111		return -ENOMEM;
112	}
113
114        return 0;
115}
116
117static int s3d_pci_register(struct pci_dev *pdev,
118			    const struct pci_device_id *ent)
119{
120	struct fb_info *info;
121	struct s3d_info *sp;
122	int err;
123
124	err = aperture_remove_conflicting_pci_devices(pdev, "s3dfb");
125	if (err)
126		return err;
127
128	err = pci_enable_device(pdev);
129	if (err < 0) {
130		printk(KERN_ERR "s3d: Cannot enable PCI device %s\n",
131		       pci_name(pdev));
132		goto err_out;
133	}
134
135	info = framebuffer_alloc(sizeof(struct s3d_info), &pdev->dev);
136	if (!info) {
137		err = -ENOMEM;
138		goto err_disable;
139	}
140
141	sp = info->par;
142	sp->info = info;
143	sp->pdev = pdev;
144	sp->of_node = pci_device_to_OF_node(pdev);
145	if (!sp->of_node) {
146		printk(KERN_ERR "s3d: Cannot find OF node of %s\n",
147		       pci_name(pdev));
148		err = -ENODEV;
149		goto err_release_fb;
150	}
151
152	sp->fb_base_phys = pci_resource_start (pdev, 1);
153
154	err = pci_request_region(pdev, 1, "s3d framebuffer");
155	if (err < 0) {
156		printk("s3d: Cannot request region 1 for %s\n",
157		       pci_name(pdev));
158		goto err_release_fb;
159	}
160
161	err = s3d_get_props(sp);
162	if (err)
163		goto err_release_pci;
164
165	/* XXX 'linebytes' is often wrong, it is equal to the width
166	 * XXX with depth of 32 on my XVR-2500 which is clearly not
167	 * XXX right.  So we don't try to use it.
168	 */
169	switch (sp->depth) {
170	case 8:
171		info->fix.line_length = sp->width;
172		break;
173	case 16:
174		info->fix.line_length = sp->width * 2;
175		break;
176	case 24:
177		info->fix.line_length = sp->width * 3;
178		break;
179	case 32:
180		info->fix.line_length = sp->width * 4;
181		break;
182	}
183	sp->fb_size = info->fix.line_length * sp->height;
184
185	sp->fb_base = ioremap(sp->fb_base_phys, sp->fb_size);
186	if (!sp->fb_base) {
187		err = -ENOMEM;
188		goto err_release_pci;
189	}
190
191	err = s3d_set_fbinfo(sp);
192	if (err)
193		goto err_unmap_fb;
194
195	pci_set_drvdata(pdev, info);
196
197	printk("s3d: Found device at %s\n", pci_name(pdev));
198
199	err = register_framebuffer(info);
200	if (err < 0) {
201		printk(KERN_ERR "s3d: Could not register framebuffer %s\n",
202		       pci_name(pdev));
203		goto err_unmap_fb;
204	}
205
206	return 0;
207
208err_unmap_fb:
209	iounmap(sp->fb_base);
210
211err_release_pci:
212	pci_release_region(pdev, 1);
213
214err_release_fb:
215        framebuffer_release(info);
216
217err_disable:
218	pci_disable_device(pdev);
219
220err_out:
221	return err;
222}
223
224static const struct pci_device_id s3d_pci_table[] = {
225	{	PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x002c),	},
226	{	PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x002d),	},
227	{	PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x002e),	},
228	{	PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x002f),	},
229	{	PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x0030),	},
230	{	PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x0031),	},
231	{	PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x0032),	},
232	{	PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x0033),	},
233	{ 0, }
234};
235
236static struct pci_driver s3d_driver = {
237	.driver = {
238		.suppress_bind_attrs = true,
239	},
240	.name		= "s3d",
241	.id_table	= s3d_pci_table,
242	.probe		= s3d_pci_register,
243};
244
245static int __init s3d_init(void)
246{
247	if (fb_modesetting_disabled("s3d"))
248		return -ENODEV;
249
250	if (fb_get_options("s3d", NULL))
251		return -ENODEV;
252
253	return pci_register_driver(&s3d_driver);
254}
255device_initcall(s3d_init);