--- /dev/null
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/ioport.h>
+
+#include <asm/io.h>
+#include <asm/bitops.h>
+
+#include <mach/io.h>
+#include <mach/vrfb.h>
+
+/*#define DEBUG*/
+
+#ifdef DEBUG
+#define DBG(format, ...) printk(KERN_DEBUG "VRFB: " format, ## __VA_ARGS__)
+#else
+#define DBG(format, ...)
+#endif
+
+#define SMS_ROT_VIRT_BASE(context, rot) \
+ (((context >= 4) ? 0xD0000000 : 0x70000000) \
+ + (0x4000000 * (context)) \
+ + (0x1000000 * (rot)))
+
+#define OMAP_VRFB_SIZE (2048 * 2048 * 4)
+
+#define VRFB_PAGE_WIDTH_EXP 5 /* Assuming SDRAM pagesize= 1024 */
+#define VRFB_PAGE_HEIGHT_EXP 5 /* 1024 = 2^5 * 2^5 */
+#define VRFB_PAGE_WIDTH (1 << VRFB_PAGE_WIDTH_EXP)
+#define VRFB_PAGE_HEIGHT (1 << VRFB_PAGE_HEIGHT_EXP)
+#define SMS_IMAGEHEIGHT_OFFSET 16
+#define SMS_IMAGEWIDTH_OFFSET 0
+#define SMS_PH_OFFSET 8
+#define SMS_PW_OFFSET 4
+#define SMS_PS_OFFSET 0
+
+#define OMAP_SMS_BASE 0x6C000000
+#define SMS_ROT_CONTROL(context) (OMAP_SMS_BASE + 0x180 + 0x10 * context)
+#define SMS_ROT_SIZE(context) (OMAP_SMS_BASE + 0x184 + 0x10 * context)
+#define SMS_ROT_PHYSICAL_BA(context) (OMAP_SMS_BASE + 0x188 + 0x10 * context)
+
+#define VRFB_NUM_CTXS 12
+/* bitmap of reserved contexts */
+static unsigned long ctx_map;
+
+/*
+ * Access to this happens from client drivers or the PM core after wake-up.
+ * For the first case we require locking at the driver level, for the second
+ * we don't need locking, since no drivers will run until after the wake-up
+ * has finished.
+ */
+static struct {
+ u32 physical_ba;
+ u32 control;
+ u32 size;
+} vrfb_hw_context[VRFB_NUM_CTXS];
+
+static void inline restore_hw_context(int ctx)
+{
+ omap_writel(vrfb_hw_context[ctx].control, SMS_ROT_CONTROL(ctx));
+ omap_writel(vrfb_hw_context[ctx].size, SMS_ROT_SIZE(ctx));
+ omap_writel(vrfb_hw_context[ctx].physical_ba, SMS_ROT_PHYSICAL_BA(ctx));
+}
+
+/*
+ * This the extra space needed in the VRFB physical area for VRFB to safely wrap
+ * any memory accesses to the invisible part of the virtual view to the physical
+ * area.
+ */
+static inline u32 get_extra_physical_size(u16 width, u8 bytespp)
+{
+ return (OMAP_VRFB_LINE_LEN - width) * bytespp * VRFB_PAGE_HEIGHT;
+}
+
+void omap_vrfb_restore_context(void)
+{
+ int i;
+ unsigned long map = ctx_map;
+
+ for (i = ffs(map); i; i = ffs(map)) {
+ /* i=1..32 */
+ i--;
+ map &= ~(1 << i);
+ restore_hw_context(i);
+ }
+}
+
+void omap_vrfb_adjust_size(u16 *width, u16 *height,
+ u8 bytespp)
+{
+ *width = ALIGN(*width * bytespp, VRFB_PAGE_WIDTH) / bytespp;
+ *height = ALIGN(*height, VRFB_PAGE_HEIGHT);
+}
+EXPORT_SYMBOL(omap_vrfb_adjust_size);
+
+u32 omap_vrfb_min_phys_size(u16 width, u16 height, u8 bytespp)
+{
+ /* mmap() is page aligned */
+ height = ALIGN(OMAP_VRFB_LINE_LEN * bytespp * height, PAGE_SIZE) /
+ (OMAP_VRFB_LINE_LEN * bytespp);
+
+ omap_vrfb_adjust_size(&width, &height, bytespp);
+
+ if (width > OMAP_VRFB_LINE_LEN)
+ return 0;
+
+ if (height > 2048)
+ return 0;
+
+ return (width * height * bytespp) + get_extra_physical_size(width, bytespp);
+}
+EXPORT_SYMBOL(omap_vrfb_min_phys_size);
+
+u16 omap_vrfb_max_height(u32 phys_size, u16 width, u8 bytespp)
+{
+ unsigned long height;
+ unsigned long extra;
+
+ width = ALIGN(width * bytespp, VRFB_PAGE_WIDTH) / bytespp;
+
+ if (width > OMAP_VRFB_LINE_LEN)
+ return 0;
+
+ extra = get_extra_physical_size(width, bytespp);
+
+ if (phys_size < extra)
+ return 0;
+
+ height = (phys_size - extra) / (width * bytespp);
+
+ /* mmap() is page aligned */
+ height = (OMAP_VRFB_LINE_LEN * bytespp * height & ~PAGE_MASK) /
+ (OMAP_VRFB_LINE_LEN * bytespp);
+
+ /* Only full tiles */
+ height &= ~(VRFB_PAGE_HEIGHT - 1);
+
+ /* Virtual views provided by VRFB are limited to 2048x2048. */
+ return min(height, 2048UL);
+}
+EXPORT_SYMBOL(omap_vrfb_max_height);
+
+void omap_vrfb_setup(struct vrfb *vrfb, unsigned long paddr,
+ u16 width, u16 height,
+ enum omap_color_mode color_mode)
+{
+ unsigned pixel_size_exp;
+ u16 vrfb_width;
+ u16 vrfb_height;
+ u8 ctx = vrfb->context;
+ u8 bytespp;
+ u32 size;
+ u32 control;
+
+ DBG("omapfb_set_vrfb(%d, %lx, %dx%d, %d)\n", ctx, paddr,
+ width, height, color_mode);
+
+ switch (color_mode) {
+ case OMAP_DSS_COLOR_RGB16:
+ case OMAP_DSS_COLOR_ARGB16:
+ bytespp = 2;
+ break;
+
+ case OMAP_DSS_COLOR_RGB24P:
+ bytespp = 3;
+ break;
+
+ case OMAP_DSS_COLOR_RGB24U:
+ case OMAP_DSS_COLOR_ARGB32:
+ case OMAP_DSS_COLOR_RGBA32:
+ case OMAP_DSS_COLOR_RGBX32:
+ case OMAP_DSS_COLOR_YUV2:
+ case OMAP_DSS_COLOR_UYVY:
+ bytespp = 4;
+ break;
+
+ default:
+ BUG();
+ return;
+ }
+
+ if (color_mode == OMAP_DSS_COLOR_YUV2 ||
+ color_mode == OMAP_DSS_COLOR_UYVY)
+ width >>= 1;
+
+ if (bytespp == 4)
+ pixel_size_exp = 2;
+ else if (bytespp == 2)
+ pixel_size_exp = 1;
+ else
+ BUG();
+
+ vrfb_width = ALIGN(width * bytespp, VRFB_PAGE_WIDTH) / bytespp;
+ vrfb_height = ALIGN(height, VRFB_PAGE_HEIGHT);
+
+ DBG("vrfb w %u, h %u bytespp %d\n", vrfb_width, vrfb_height, bytespp);
+
+ size = vrfb_width << SMS_IMAGEWIDTH_OFFSET;
+ size |= vrfb_height << SMS_IMAGEHEIGHT_OFFSET;
+
+ control = pixel_size_exp << SMS_PS_OFFSET;
+ control |= VRFB_PAGE_WIDTH_EXP << SMS_PW_OFFSET;
+ control |= VRFB_PAGE_HEIGHT_EXP << SMS_PH_OFFSET;
+
+ vrfb_hw_context[ctx].physical_ba = paddr;
+ vrfb_hw_context[ctx].size = size;
+ vrfb_hw_context[ctx].control = control;
+
+ omap_writel(paddr, SMS_ROT_PHYSICAL_BA(ctx));
+ omap_writel(size, SMS_ROT_SIZE(ctx));
+ omap_writel(control, SMS_ROT_CONTROL(ctx));
+
+ DBG("vrfb offset pixels %d, %d\n",
+ vrfb_width - width, vrfb_height - height);
+
+ vrfb->xres = width;
+ vrfb->yres = height;
+ vrfb->xoffset = vrfb_width - width;
+ vrfb->yoffset = vrfb_height - height;
+ vrfb->bytespp = bytespp;
+}
+EXPORT_SYMBOL(omap_vrfb_setup);
+
+int omap_vrfb_map_angle(struct vrfb *vrfb, u16 height, u8 rot)
+{
+ unsigned long size = height * OMAP_VRFB_LINE_LEN * vrfb->bytespp;
+
+ vrfb->vaddr[rot] = ioremap_wc(vrfb->paddr[rot], size);
+
+ if (!vrfb->vaddr[rot]) {
+ printk(KERN_ERR "vrfb: ioremap failed\n");
+ return -ENOMEM;
+ }
+
+ DBG("ioremapped vrfb area %d of size %lu into %p\n", rot, size,
+ vrfb->vaddr[rot]);
+
+ return 0;
+}
+EXPORT_SYMBOL(omap_vrfb_map_angle);
+
+void omap_vrfb_release_ctx(struct vrfb *vrfb)
+{
+ int rot;
+ int ctx = vrfb->context;
+
+ if (ctx == 0xff)
+ return;
+
+ DBG("release ctx %d\n", ctx);
+
+ if (!(ctx_map & (1 << ctx))) {
+ BUG();
+ return;
+ }
+ clear_bit(ctx, &ctx_map);
+
+ for (rot = 0; rot < 4; ++rot) {
+ if(vrfb->paddr[rot]) {
+ release_mem_region(vrfb->paddr[rot], OMAP_VRFB_SIZE);
+ vrfb->paddr[rot] = 0;
+ }
+ }
+
+ vrfb->context = 0xff;
+}
+EXPORT_SYMBOL(omap_vrfb_release_ctx);
+
+int omap_vrfb_request_ctx(struct vrfb *vrfb)
+{
+ int rot;
+ u32 paddr;
+ u8 ctx;
+
+ DBG("request ctx\n");
+
+ for (ctx = 0; ctx < VRFB_NUM_CTXS; ++ctx)
+ if ((ctx_map & (1 << ctx)) == 0)
+ break;
+
+ if (ctx == VRFB_NUM_CTXS) {
+ printk(KERN_ERR "vrfb: no free contexts\n");
+ return -EBUSY;
+ }
+
+ DBG("found free ctx %d\n", ctx);
+
+ set_bit(ctx, &ctx_map);
+
+ memset(vrfb, 0, sizeof(*vrfb));
+
+ vrfb->context = ctx;
+
+ for (rot = 0; rot < 4; ++rot) {
+ paddr = SMS_ROT_VIRT_BASE(ctx, rot);
+ if (!request_mem_region(paddr, OMAP_VRFB_SIZE, "vrfb")) {
+ printk(KERN_ERR "vrfb: failed to reserve VRFB "
+ "area for ctx %d, rotation %d\n",
+ ctx, rot * 90);
+ omap_vrfb_release_ctx(vrfb);
+ return -ENOMEM;
+ }
+
+ vrfb->paddr[rot] = paddr;
+
+ DBG("VRFB %d/%d: %lx\n", ctx, rot*90, vrfb->paddr[rot]);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(omap_vrfb_request_ctx);
+
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