357 lines
8.5 KiB
C
357 lines
8.5 KiB
C
/* $Id: ffb_drv.c,v 1.16 2001/10/18 16:00:24 davem Exp $
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* ffb_drv.c: Creator/Creator3D direct rendering driver.
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*
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* Copyright (C) 2000 David S. Miller (davem@redhat.com)
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*/
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#include "ffb.h"
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#include "drmP.h"
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#include "ffb_drv.h"
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#include <linux/sched.h>
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#include <linux/smp_lock.h>
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#include <asm/shmparam.h>
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#include <asm/oplib.h>
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#include <asm/upa.h>
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#define DRIVER_AUTHOR "David S. Miller"
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#define DRIVER_NAME "ffb"
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#define DRIVER_DESC "Creator/Creator3D"
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#define DRIVER_DATE "20000517"
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#define DRIVER_MAJOR 0
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#define DRIVER_MINOR 0
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#define DRIVER_PATCHLEVEL 1
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typedef struct _ffb_position_t {
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int node;
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int root;
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} ffb_position_t;
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static ffb_position_t *ffb_position;
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static void get_ffb_type(ffb_dev_priv_t * ffb_priv, int instance)
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{
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volatile unsigned char *strap_bits;
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unsigned char val;
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strap_bits = (volatile unsigned char *)
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(ffb_priv->card_phys_base + 0x00200000UL);
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/* Don't ask, you have to read the value twice for whatever
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* reason to get correct contents.
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*/
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val = upa_readb(strap_bits);
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val = upa_readb(strap_bits);
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switch (val & 0x78) {
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case (0x0 << 5) | (0x0 << 3):
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ffb_priv->ffb_type = ffb1_prototype;
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printk("ffb%d: Detected FFB1 pre-FCS prototype\n", instance);
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break;
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case (0x0 << 5) | (0x1 << 3):
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ffb_priv->ffb_type = ffb1_standard;
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printk("ffb%d: Detected FFB1\n", instance);
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break;
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case (0x0 << 5) | (0x3 << 3):
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ffb_priv->ffb_type = ffb1_speedsort;
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printk("ffb%d: Detected FFB1-SpeedSort\n", instance);
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break;
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case (0x1 << 5) | (0x0 << 3):
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ffb_priv->ffb_type = ffb2_prototype;
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printk("ffb%d: Detected FFB2/vertical pre-FCS prototype\n",
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instance);
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break;
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case (0x1 << 5) | (0x1 << 3):
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ffb_priv->ffb_type = ffb2_vertical;
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printk("ffb%d: Detected FFB2/vertical\n", instance);
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break;
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case (0x1 << 5) | (0x2 << 3):
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ffb_priv->ffb_type = ffb2_vertical_plus;
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printk("ffb%d: Detected FFB2+/vertical\n", instance);
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break;
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case (0x2 << 5) | (0x0 << 3):
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ffb_priv->ffb_type = ffb2_horizontal;
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printk("ffb%d: Detected FFB2/horizontal\n", instance);
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break;
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case (0x2 << 5) | (0x2 << 3):
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ffb_priv->ffb_type = ffb2_horizontal;
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printk("ffb%d: Detected FFB2+/horizontal\n", instance);
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break;
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default:
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ffb_priv->ffb_type = ffb2_vertical;
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printk("ffb%d: Unknown boardID[%08x], assuming FFB2\n",
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instance, val);
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break;
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};
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}
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static void ffb_apply_upa_parent_ranges(int parent,
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struct linux_prom64_registers *regs)
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{
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struct linux_prom64_ranges ranges[PROMREG_MAX];
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char name[128];
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int len, i;
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prom_getproperty(parent, "name", name, sizeof(name));
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if (strcmp(name, "upa") != 0)
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return;
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len =
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prom_getproperty(parent, "ranges", (void *)ranges, sizeof(ranges));
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if (len <= 0)
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return;
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len /= sizeof(struct linux_prom64_ranges);
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for (i = 0; i < len; i++) {
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struct linux_prom64_ranges *rng = &ranges[i];
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u64 phys_addr = regs->phys_addr;
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if (phys_addr >= rng->ot_child_base &&
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phys_addr < (rng->ot_child_base + rng->or_size)) {
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regs->phys_addr -= rng->ot_child_base;
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regs->phys_addr += rng->ot_parent_base;
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return;
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}
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}
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return;
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}
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static int ffb_init_one(drm_device_t * dev, int prom_node, int parent_node,
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int instance)
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{
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struct linux_prom64_registers regs[2 * PROMREG_MAX];
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ffb_dev_priv_t *ffb_priv = (ffb_dev_priv_t *) dev->dev_private;
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int i;
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ffb_priv->prom_node = prom_node;
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if (prom_getproperty(ffb_priv->prom_node, "reg",
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(void *)regs, sizeof(regs)) <= 0) {
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return -EINVAL;
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}
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ffb_apply_upa_parent_ranges(parent_node, ®s[0]);
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ffb_priv->card_phys_base = regs[0].phys_addr;
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ffb_priv->regs = (ffb_fbcPtr)
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(regs[0].phys_addr + 0x00600000UL);
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get_ffb_type(ffb_priv, instance);
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for (i = 0; i < FFB_MAX_CTXS; i++)
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ffb_priv->hw_state[i] = NULL;
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return 0;
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}
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static drm_map_t *ffb_find_map(struct file *filp, unsigned long off)
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{
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drm_file_t *priv = filp->private_data;
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drm_device_t *dev;
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drm_map_list_t *r_list;
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struct list_head *list;
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drm_map_t *map;
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if (!priv || (dev = priv->dev) == NULL)
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return NULL;
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list_for_each(list, &dev->maplist->head) {
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r_list = (drm_map_list_t *) list;
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map = r_list->map;
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if (!map)
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continue;
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if (r_list->user_token == off)
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return map;
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}
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return NULL;
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}
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unsigned long ffb_get_unmapped_area(struct file *filp,
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unsigned long hint,
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unsigned long len,
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unsigned long pgoff, unsigned long flags)
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{
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drm_map_t *map = ffb_find_map(filp, pgoff << PAGE_SHIFT);
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unsigned long addr = -ENOMEM;
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if (!map)
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return get_unmapped_area(NULL, hint, len, pgoff, flags);
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if (map->type == _DRM_FRAME_BUFFER || map->type == _DRM_REGISTERS) {
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#ifdef HAVE_ARCH_FB_UNMAPPED_AREA
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addr = get_fb_unmapped_area(filp, hint, len, pgoff, flags);
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#else
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addr = get_unmapped_area(NULL, hint, len, pgoff, flags);
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#endif
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} else if (map->type == _DRM_SHM && SHMLBA > PAGE_SIZE) {
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unsigned long slack = SHMLBA - PAGE_SIZE;
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addr = get_unmapped_area(NULL, hint, len + slack, pgoff, flags);
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if (!(addr & ~PAGE_MASK)) {
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unsigned long kvirt = (unsigned long)map->handle;
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if ((kvirt & (SHMLBA - 1)) != (addr & (SHMLBA - 1))) {
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unsigned long koff, aoff;
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koff = kvirt & (SHMLBA - 1);
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aoff = addr & (SHMLBA - 1);
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if (koff < aoff)
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koff += SHMLBA;
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addr += (koff - aoff);
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}
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}
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} else {
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addr = get_unmapped_area(NULL, hint, len, pgoff, flags);
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}
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return addr;
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}
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static int ffb_presetup(drm_device_t * dev)
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{
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ffb_dev_priv_t *ffb_priv;
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int ret = 0;
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int i = 0;
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/* Check for the case where no device was found. */
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if (ffb_position == NULL)
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return -ENODEV;
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/* code used to use numdevs no numdevs anymore */
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ffb_priv = kmalloc(sizeof(ffb_dev_priv_t), GFP_KERNEL);
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if (!ffb_priv)
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return -ENOMEM;
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memset(ffb_priv, 0, sizeof(*ffb_priv));
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dev->dev_private = ffb_priv;
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ret = ffb_init_one(dev, ffb_position[i].node, ffb_position[i].root, i);
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return ret;
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}
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static void ffb_driver_release(drm_device_t * dev, struct file *filp)
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{
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ffb_dev_priv_t *fpriv = (ffb_dev_priv_t *) dev->dev_private;
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int context = _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock);
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int idx;
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idx = context - 1;
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if (fpriv &&
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context != DRM_KERNEL_CONTEXT && fpriv->hw_state[idx] != NULL) {
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kfree(fpriv->hw_state[idx]);
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fpriv->hw_state[idx] = NULL;
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}
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}
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static void ffb_driver_pretakedown(drm_device_t * dev)
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{
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kfree(dev->dev_private);
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}
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static int ffb_driver_postcleanup(drm_device_t * dev)
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{
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kfree(ffb_position);
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return 0;
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}
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static void ffb_driver_kernel_context_switch_unlock(struct drm_device *dev,
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drm_lock_t * lock)
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{
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dev->lock.filp = 0;
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{
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__volatile__ unsigned int *plock = &dev->lock.hw_lock->lock;
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unsigned int old, new, prev, ctx;
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ctx = lock->context;
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do {
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old = *plock;
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new = ctx;
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prev = cmpxchg(plock, old, new);
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} while (prev != old);
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}
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wake_up_interruptible(&dev->lock.lock_queue);
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}
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static unsigned long ffb_driver_get_map_ofs(drm_map_t * map)
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{
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return (map->offset & 0xffffffff);
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}
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static unsigned long ffb_driver_get_reg_ofs(drm_device_t * dev)
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{
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ffb_dev_priv_t *ffb_priv = (ffb_dev_priv_t *) dev->dev_private;
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if (ffb_priv)
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return ffb_priv->card_phys_base;
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return 0;
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}
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static int postinit(struct drm_device *dev, unsigned long flags)
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{
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DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
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DRIVER_NAME,
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DRIVER_MAJOR,
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DRIVER_MINOR, DRIVER_PATCHLEVEL, DRIVER_DATE, dev->minor);
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return 0;
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}
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static int version(drm_version_t * version)
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{
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int len;
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version->version_major = DRIVER_MAJOR;
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version->version_minor = DRIVER_MINOR;
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version->version_patchlevel = DRIVER_PATCHLEVEL;
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DRM_COPY(version->name, DRIVER_NAME);
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DRM_COPY(version->date, DRIVER_DATE);
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DRM_COPY(version->desc, DRIVER_DESC);
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return 0;
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}
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static drm_ioctl_desc_t ioctls[] = {
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};
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static struct drm_driver driver = {
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.driver_features = 0,
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.dev_priv_size = sizeof(u32),
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.release = ffb_driver_release,
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.presetup = ffb_presetup,
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.pretakedown = ffb_driver_pretakedown,
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.postcleanup = ffb_driver_postcleanup,
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.kernel_context_switch = ffb_driver_context_switch,
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.kernel_context_switch_unlock = ffb_driver_kernel_context_switch_unlock,
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.get_map_ofs = ffb_driver_get_map_ofs,
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.get_reg_ofs = ffb_driver_get_reg_ofs,
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.postinit = postinit,
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.version = version,
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.ioctls = ioctls,
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.num_ioctls = DRM_ARRAY_SIZE(ioctls),
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.fops = {
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.owner = THIS_MODULE,
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.open = drm_open,
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.release = drm_release,
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.ioctl = drm_ioctl,
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.mmap = drm_mmap,
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.poll = drm_poll,
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.fasync = drm_fasync,
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}
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,
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};
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static int __init ffb_init(void)
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{
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return -ENODEV;
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}
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static void __exit ffb_exit(void)
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{
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}
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module_init(ffb_init);
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module_exit(ffb_exit);
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MODULE_AUTHOR(DRIVER_AUTHOR);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE("GPL and additional rights");
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