1 /* $Id: ffb_drv.c,v 1.16 2001/10/18 16:00:24 davem Exp $
2 * ffb_drv.c: Creator/Creator3D direct rendering driver.
4 * Copyright (C) 2000 David S. Miller (davem@redhat.com)
12 #include <linux/smp_lock.h>
13 #include <asm/shmparam.h>
14 #include <asm/oplib.h>
17 #define DRIVER_AUTHOR "David S. Miller"
19 #define DRIVER_NAME "ffb"
20 #define DRIVER_DESC "Creator/Creator3D"
21 #define DRIVER_DATE "20000517"
23 #define DRIVER_MAJOR 0
24 #define DRIVER_MINOR 0
25 #define DRIVER_PATCHLEVEL 1
27 typedef struct _ffb_position_t {
32 static ffb_position_t *ffb_position;
34 static void get_ffb_type(ffb_dev_priv_t * ffb_priv, int instance)
36 volatile unsigned char *strap_bits;
39 strap_bits = (volatile unsigned char *)
40 (ffb_priv->card_phys_base + 0x00200000UL);
42 /* Don't ask, you have to read the value twice for whatever
43 * reason to get correct contents.
45 val = upa_readb(strap_bits);
46 val = upa_readb(strap_bits);
48 case (0x0 << 5) | (0x0 << 3):
49 ffb_priv->ffb_type = ffb1_prototype;
50 printk("ffb%d: Detected FFB1 pre-FCS prototype\n", instance);
52 case (0x0 << 5) | (0x1 << 3):
53 ffb_priv->ffb_type = ffb1_standard;
54 printk("ffb%d: Detected FFB1\n", instance);
56 case (0x0 << 5) | (0x3 << 3):
57 ffb_priv->ffb_type = ffb1_speedsort;
58 printk("ffb%d: Detected FFB1-SpeedSort\n", instance);
60 case (0x1 << 5) | (0x0 << 3):
61 ffb_priv->ffb_type = ffb2_prototype;
62 printk("ffb%d: Detected FFB2/vertical pre-FCS prototype\n",
65 case (0x1 << 5) | (0x1 << 3):
66 ffb_priv->ffb_type = ffb2_vertical;
67 printk("ffb%d: Detected FFB2/vertical\n", instance);
69 case (0x1 << 5) | (0x2 << 3):
70 ffb_priv->ffb_type = ffb2_vertical_plus;
71 printk("ffb%d: Detected FFB2+/vertical\n", instance);
73 case (0x2 << 5) | (0x0 << 3):
74 ffb_priv->ffb_type = ffb2_horizontal;
75 printk("ffb%d: Detected FFB2/horizontal\n", instance);
77 case (0x2 << 5) | (0x2 << 3):
78 ffb_priv->ffb_type = ffb2_horizontal;
79 printk("ffb%d: Detected FFB2+/horizontal\n", instance);
82 ffb_priv->ffb_type = ffb2_vertical;
83 printk("ffb%d: Unknown boardID[%08x], assuming FFB2\n",
89 static void ffb_apply_upa_parent_ranges(int parent,
90 struct linux_prom64_registers *regs)
92 struct linux_prom64_ranges ranges[PROMREG_MAX];
96 prom_getproperty(parent, "name", name, sizeof(name));
97 if (strcmp(name, "upa") != 0)
101 prom_getproperty(parent, "ranges", (void *)ranges, sizeof(ranges));
105 len /= sizeof(struct linux_prom64_ranges);
106 for (i = 0; i < len; i++) {
107 struct linux_prom64_ranges *rng = &ranges[i];
108 u64 phys_addr = regs->phys_addr;
110 if (phys_addr >= rng->ot_child_base &&
111 phys_addr < (rng->ot_child_base + rng->or_size)) {
112 regs->phys_addr -= rng->ot_child_base;
113 regs->phys_addr += rng->ot_parent_base;
121 static int ffb_init_one(drm_device_t * dev, int prom_node, int parent_node,
124 struct linux_prom64_registers regs[2 * PROMREG_MAX];
125 ffb_dev_priv_t *ffb_priv = (ffb_dev_priv_t *) dev->dev_private;
128 ffb_priv->prom_node = prom_node;
129 if (prom_getproperty(ffb_priv->prom_node, "reg",
130 (void *)regs, sizeof(regs)) <= 0) {
133 ffb_apply_upa_parent_ranges(parent_node, ®s[0]);
134 ffb_priv->card_phys_base = regs[0].phys_addr;
135 ffb_priv->regs = (ffb_fbcPtr)
136 (regs[0].phys_addr + 0x00600000UL);
137 get_ffb_type(ffb_priv, instance);
138 for (i = 0; i < FFB_MAX_CTXS; i++)
139 ffb_priv->hw_state[i] = NULL;
144 static drm_map_t *ffb_find_map(struct file *filp, unsigned long off)
146 drm_file_t *priv = filp->private_data;
148 drm_map_list_t *r_list;
149 struct list_head *list;
152 if (!priv || (dev = priv->dev) == NULL)
155 list_for_each(list, &dev->maplist->head) {
156 r_list = (drm_map_list_t *) list;
160 if (r_list->user_token == off)
167 unsigned long ffb_get_unmapped_area(struct file *filp,
170 unsigned long pgoff, unsigned long flags)
172 drm_map_t *map = ffb_find_map(filp, pgoff << PAGE_SHIFT);
173 unsigned long addr = -ENOMEM;
176 return get_unmapped_area(NULL, hint, len, pgoff, flags);
178 if (map->type == _DRM_FRAME_BUFFER || map->type == _DRM_REGISTERS) {
179 #ifdef HAVE_ARCH_FB_UNMAPPED_AREA
180 addr = get_fb_unmapped_area(filp, hint, len, pgoff, flags);
182 addr = get_unmapped_area(NULL, hint, len, pgoff, flags);
184 } else if (map->type == _DRM_SHM && SHMLBA > PAGE_SIZE) {
185 unsigned long slack = SHMLBA - PAGE_SIZE;
187 addr = get_unmapped_area(NULL, hint, len + slack, pgoff, flags);
188 if (!(addr & ~PAGE_MASK)) {
189 unsigned long kvirt = (unsigned long)map->handle;
191 if ((kvirt & (SHMLBA - 1)) != (addr & (SHMLBA - 1))) {
192 unsigned long koff, aoff;
194 koff = kvirt & (SHMLBA - 1);
195 aoff = addr & (SHMLBA - 1);
199 addr += (koff - aoff);
203 addr = get_unmapped_area(NULL, hint, len, pgoff, flags);
209 static int ffb_presetup(drm_device_t * dev)
211 ffb_dev_priv_t *ffb_priv;
215 /* Check for the case where no device was found. */
216 if (ffb_position == NULL)
219 /* code used to use numdevs no numdevs anymore */
220 ffb_priv = kmalloc(sizeof(ffb_dev_priv_t), GFP_KERNEL);
223 memset(ffb_priv, 0, sizeof(*ffb_priv));
224 dev->dev_private = ffb_priv;
226 ret = ffb_init_one(dev, ffb_position[i].node, ffb_position[i].root, i);
230 static void ffb_driver_release(drm_device_t * dev, struct file *filp)
232 ffb_dev_priv_t *fpriv = (ffb_dev_priv_t *) dev->dev_private;
233 int context = _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock);
238 context != DRM_KERNEL_CONTEXT && fpriv->hw_state[idx] != NULL) {
239 kfree(fpriv->hw_state[idx]);
240 fpriv->hw_state[idx] = NULL;
244 static void ffb_driver_pretakedown(drm_device_t * dev)
246 kfree(dev->dev_private);
249 static int ffb_driver_postcleanup(drm_device_t * dev)
255 static void ffb_driver_kernel_context_switch_unlock(struct drm_device *dev,
260 __volatile__ unsigned int *plock = &dev->lock.hw_lock->lock;
261 unsigned int old, new, prev, ctx;
267 prev = cmpxchg(plock, old, new);
268 } while (prev != old);
270 wake_up_interruptible(&dev->lock.lock_queue);
273 static unsigned long ffb_driver_get_map_ofs(drm_map_t * map)
275 return (map->offset & 0xffffffff);
278 static unsigned long ffb_driver_get_reg_ofs(drm_device_t * dev)
280 ffb_dev_priv_t *ffb_priv = (ffb_dev_priv_t *) dev->dev_private;
283 return ffb_priv->card_phys_base;
288 static int postinit(struct drm_device *dev, unsigned long flags)
290 DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
293 DRIVER_MINOR, DRIVER_PATCHLEVEL, DRIVER_DATE, dev->minor);
297 static int version(drm_version_t * version)
301 version->version_major = DRIVER_MAJOR;
302 version->version_minor = DRIVER_MINOR;
303 version->version_patchlevel = DRIVER_PATCHLEVEL;
304 DRM_COPY(version->name, DRIVER_NAME);
305 DRM_COPY(version->date, DRIVER_DATE);
306 DRM_COPY(version->desc, DRIVER_DESC);
310 static drm_ioctl_desc_t ioctls[] = {
314 static struct drm_driver driver = {
315 .driver_features = 0,
316 .dev_priv_size = sizeof(u32),
317 .release = ffb_driver_release,
318 .presetup = ffb_presetup,
319 .pretakedown = ffb_driver_pretakedown,
320 .postcleanup = ffb_driver_postcleanup,
321 .kernel_context_switch = ffb_driver_context_switch,
322 .kernel_context_switch_unlock = ffb_driver_kernel_context_switch_unlock,
323 .get_map_ofs = ffb_driver_get_map_ofs,
324 .get_reg_ofs = ffb_driver_get_reg_ofs,
325 .postinit = postinit,
328 .num_ioctls = DRM_ARRAY_SIZE(ioctls),
330 .owner = THIS_MODULE,
332 .release = drm_release,
336 .fasync = drm_fasync,
341 static int __init ffb_init(void)
346 static void __exit ffb_exit(void)
350 module_init(ffb_init);
351 module_exit(ffb_exit);
353 MODULE_AUTHOR(DRIVER_AUTHOR);
354 MODULE_DESCRIPTION(DRIVER_DESC);
355 MODULE_LICENSE("GPL and additional rights");