+/*
+ * File: arch/arm/plat-omap/fb.c
+ *
+ * Framebuffer device registration for TI OMAP platforms
+ *
+ * Copyright (C) 2006 Nokia Corporation
+ * Author: Imre Deak <imre.deak@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
void omapfb_reserve_mem(void)
{
const struct omap_fbmem_config *fbmem_conf;
+ unsigned long total_size;
+ int i;
+
+ if (!omap_fb_sram_valid) {
+ /* FBMEM SRAM configuration was already found to be invalid.
+ * Ignore the whole configuration block. */
+ omapfb_config.mem_desc.region_cnt = 0;
+ return;
+ }
+
+ i = 0;
+ total_size = 0;
+ while ((fbmem_conf = omap_get_nr_config(OMAP_TAG_FBMEM,
+ struct omap_fbmem_config, i)) != NULL) {
+ unsigned long start;
+ unsigned long size;
- omapfb_config.fbmem.fb_sram_start = omap_fb_sram_start;
- omapfb_config.fbmem.fb_sram_size = omap_fb_sram_size;
-
- fbmem_conf = omap_get_config(OMAP_TAG_FBMEM, struct omap_fbmem_config);
-
- if (fbmem_conf != NULL) {
- /* indicate that the bootloader already initialized the
- * fb device, so we'll skip that part in the fb driver
- */
- omapfb_config.fbmem.fb_sdram_start = fbmem_conf->fb_sdram_start;
- omapfb_config.fbmem.fb_sdram_size = fbmem_conf->fb_sdram_size;
- if (fbmem_conf->fb_sdram_size) {
- pr_info("Reserving %u bytes SDRAM for frame buffer\n",
- fbmem_conf->fb_sdram_size);
- reserve_bootmem(fbmem_conf->fb_sdram_start,
- fbmem_conf->fb_sdram_size);
+ if (i == OMAPFB_PLANE_NUM) {
+ printk(KERN_ERR "ignoring extra plane info\n");
+ break;
}
+ start = fbmem_conf->start;
+ size = fbmem_conf->size;
+ omapfb_config.mem_desc.region[i].paddr = start;
+ omapfb_config.mem_desc.region[i].size = size;
+ if (omap_fb_sram_plane != i && start) {
+ reserve_bootmem(start, size);
+ total_size += size;
+ }
+ i++;
}
+ omapfb_config.mem_desc.region_cnt = i;
+ if (total_size)
+ pr_info("Reserving %lu bytes SDRAM for frame buffer\n",
+ total_size);
+
}
static inline int omap_init_fb(void)
#define ROUND_DOWN(value,boundary) ((value) & (~((boundary)-1)))
+static unsigned long omap_sram_start;
static unsigned long omap_sram_base;
static unsigned long omap_sram_size;
static unsigned long omap_sram_ceil;
-unsigned long omap_fb_sram_start;
-unsigned long omap_fb_sram_size;
+int omap_fb_sram_plane = -1;
+int omap_fb_sram_valid;
/* Depending on the target RAMFS firewall setup, the public usable amount of
* SRAM varies. The default accessable size for all device types is 2k. A GP
return 1; /* assume locked with no PPA or security driver */
}
-void get_fb_sram_conf(unsigned long start_avail, unsigned size_avail,
- unsigned long *start, unsigned long *size)
+static int get_fb_sram_conf(unsigned long start_avail, unsigned size_avail,
+ unsigned long *start, int *plane_idx)
{
const struct omap_fbmem_config *fbmem_conf;
-
- fbmem_conf = omap_get_config(OMAP_TAG_FBMEM, struct omap_fbmem_config);
- if (fbmem_conf != NULL) {
- *start = fbmem_conf->fb_sram_start;
- *size = fbmem_conf->fb_sram_size;
- } else {
- *size = 0;
- *start = 0;
+ unsigned long size = 0;
+ int i;
+
+ i = 0;
+ *start = 0;
+ *plane_idx = -1;
+ while ((fbmem_conf = omap_get_nr_config(OMAP_TAG_FBMEM,
+ struct omap_fbmem_config, i)) != NULL) {
+ u32 paddr, end;
+
+ paddr = fbmem_conf->start;
+ end = fbmem_conf->start + fbmem_conf->size;
+ if (paddr > omap_sram_start &&
+ paddr < omap_sram_start + omap_sram_size) {
+ if (*plane_idx != -1 || paddr < start_avail ||
+ paddr == end ||
+ end > start_avail + size_avail) {
+ printk(KERN_ERR "invalid FB SRAM configuration");
+ *start = 0;
+ return -1;
+ }
+ *plane_idx = i;
+ *start = fbmem_conf->start;
+ size = fbmem_conf->size;
+ }
+ i++;
}
- if (*size && (
- *start < start_avail ||
- *start + *size > start_avail + size_avail)) {
- printk(KERN_ERR "invalid FB SRAM configuration\n");
- *start = start_avail;
- *size = size_avail;
- }
+ if (*plane_idx >= 0)
+ pr_info("Reserving %lu bytes SRAM frame buffer "
+ "for plane %d\n", size, *plane_idx);
- if (*size)
- pr_info("Reserving %lu bytes SRAM for frame buffer\n", *size);
+ return 0;
}
/*
*/
void __init omap_detect_sram(void)
{
- unsigned long sram_start;
+ unsigned long fb_sram_start;
if (cpu_is_omap24xx()) {
if (is_sram_locked()) {
omap_sram_base = OMAP2_SRAM_PUB_VA;
- sram_start = OMAP2_SRAM_PUB_PA;
+ omap_sram_start = OMAP2_SRAM_PUB_PA;
omap_sram_size = 0x800; /* 2K */
} else {
omap_sram_base = OMAP2_SRAM_VA;
- sram_start = OMAP2_SRAM_PA;
+ omap_sram_start = OMAP2_SRAM_PA;
if (cpu_is_omap242x())
omap_sram_size = 0xa0000; /* 640K */
else if (cpu_is_omap243x())
}
} else {
omap_sram_base = OMAP1_SRAM_VA;
- sram_start = OMAP1_SRAM_PA;
+ omap_sram_start = OMAP1_SRAM_PA;
if (cpu_is_omap730())
omap_sram_size = 0x32000; /* 200K */
omap_sram_size = 0x4000;
}
}
- get_fb_sram_conf(sram_start + SRAM_BOOTLOADER_SZ,
- omap_sram_size - SRAM_BOOTLOADER_SZ,
- &omap_fb_sram_start, &omap_fb_sram_size);
- if (omap_fb_sram_size)
- omap_sram_size -= sram_start + omap_sram_size -
- omap_fb_sram_start;
+ if (get_fb_sram_conf(omap_sram_start + SRAM_BOOTLOADER_SZ,
+ omap_sram_size - SRAM_BOOTLOADER_SZ,
+ &fb_sram_start, &omap_fb_sram_plane) == 0)
+ omap_fb_sram_valid = 1;
+ if (omap_fb_sram_valid && omap_fb_sram_plane >= 0)
+ omap_sram_size -= omap_sram_start + omap_sram_size -
+ fb_sram_start;
omap_sram_ceil = omap_sram_base + omap_sram_size;
}
projects / linux-2.6-omap-h63xx.git / commitdiff