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- // SPDX-License-Identifier: GPL-2.0+
- /* Copyright (C) 2019 Stephan Gerhold */
- #include <common.h>
- #include <dm.h>
- #include <log.h>
- #include <video.h>
- #include <asm/io.h>
- #include <linux/bitfield.h>
- #include <linux/iopoll.h>
- #define MCDE_EXTSRC0A0 0x200
- #define MCDE_EXTSRC0CONF 0x20C
- #define MCDE_EXTSRC0CONF_BPP GENMASK(11, 8)
- #define MCDE_OVL0CONF 0x404
- #define MCDE_OVL0CONF_PPL GENMASK(10, 0)
- #define MCDE_OVL0CONF_LPF GENMASK(26, 16)
- #define MCDE_CHNL0SYNCHMOD 0x608
- #define MCDE_CHNL0SYNCHMOD_SRC_SYNCH GENMASK(1, 0)
- #define MCDE_CHNL0SYNCHSW 0x60C
- #define MCDE_CHNL0SYNCHSW_SW_TRIG BIT(0)
- #define MCDE_CRA0 0x800
- #define MCDE_CRA0_FLOEN BIT(0)
- #define MCDE_FLOW_COMPLETION_TIMEOUT 200000 /* us */
- enum mcde_bpp {
- MCDE_EXTSRC0CONF_BPP_1BPP_PAL,
- MCDE_EXTSRC0CONF_BPP_2BPP_PAL,
- MCDE_EXTSRC0CONF_BPP_4BPP_PAL,
- MCDE_EXTSRC0CONF_BPP_8BPP_PAL,
- MCDE_EXTSRC0CONF_BPP_RGB444,
- MCDE_EXTSRC0CONF_BPP_ARGB4444,
- MCDE_EXTSRC0CONF_BPP_IRGB1555,
- MCDE_EXTSRC0CONF_BPP_RGB565,
- MCDE_EXTSRC0CONF_BPP_RGB888,
- MCDE_EXTSRC0CONF_BPP_XRGB8888,
- MCDE_EXTSRC0CONF_BPP_ARGB8888,
- MCDE_EXTSRC0CONF_BPP_YCBCR422,
- };
- enum mcde_src_synch {
- MCDE_CHNL0SYNCHMOD_SRC_SYNCH_HARDWARE,
- MCDE_CHNL0SYNCHMOD_SRC_SYNCH_NO_SYNCH,
- MCDE_CHNL0SYNCHMOD_SRC_SYNCH_SOFTWARE,
- };
- struct mcde_simple_priv {
- fdt_addr_t base;
- enum mcde_src_synch src_synch;
- };
- static int mcde_simple_probe(struct udevice *dev)
- {
- struct mcde_simple_priv *priv = dev_get_priv(dev);
- struct video_uc_plat *plat = dev_get_uclass_plat(dev);
- struct video_priv *uc_priv = dev_get_uclass_priv(dev);
- u32 val;
- priv->base = dev_read_addr(dev);
- if (priv->base == FDT_ADDR_T_NONE)
- return -EINVAL;
- plat->base = readl(priv->base + MCDE_EXTSRC0A0);
- if (!plat->base)
- return -ENODEV;
- val = readl(priv->base + MCDE_OVL0CONF);
- uc_priv->xsize = FIELD_GET(MCDE_OVL0CONF_PPL, val);
- uc_priv->ysize = FIELD_GET(MCDE_OVL0CONF_LPF, val);
- uc_priv->rot = 0;
- val = readl(priv->base + MCDE_EXTSRC0CONF);
- switch (FIELD_GET(MCDE_EXTSRC0CONF_BPP, val)) {
- case MCDE_EXTSRC0CONF_BPP_RGB565:
- uc_priv->bpix = VIDEO_BPP16;
- break;
- case MCDE_EXTSRC0CONF_BPP_XRGB8888:
- case MCDE_EXTSRC0CONF_BPP_ARGB8888:
- uc_priv->bpix = VIDEO_BPP32;
- break;
- default:
- printf("unsupported format: %#x\n", val);
- return -EINVAL;
- }
- val = readl(priv->base + MCDE_CHNL0SYNCHMOD);
- priv->src_synch = FIELD_GET(MCDE_CHNL0SYNCHMOD_SRC_SYNCH, val);
- plat->size = uc_priv->xsize * uc_priv->ysize * VNBYTES(uc_priv->bpix);
- debug("MCDE base: %#lx, xsize: %d, ysize: %d, bpp: %d\n",
- plat->base, uc_priv->xsize, uc_priv->ysize, VNBITS(uc_priv->bpix));
- video_set_flush_dcache(dev, true);
- return 0;
- }
- static int mcde_simple_video_sync(struct udevice *dev)
- {
- struct mcde_simple_priv *priv = dev_get_priv(dev);
- unsigned int val;
- if (priv->src_synch != MCDE_CHNL0SYNCHMOD_SRC_SYNCH_SOFTWARE)
- return 0;
- /* Enable flow */
- val = readl(priv->base + MCDE_CRA0);
- val |= MCDE_CRA0_FLOEN;
- writel(val, priv->base + MCDE_CRA0);
- /* Trigger a software sync */
- writel(MCDE_CHNL0SYNCHSW_SW_TRIG, priv->base + MCDE_CHNL0SYNCHSW);
- /* Disable flow */
- val = readl(priv->base + MCDE_CRA0);
- val &= ~MCDE_CRA0_FLOEN;
- writel(val, priv->base + MCDE_CRA0);
- /* Wait for completion */
- return readl_poll_timeout(priv->base + MCDE_CRA0, val,
- !(val & MCDE_CRA0_FLOEN),
- MCDE_FLOW_COMPLETION_TIMEOUT);
- }
- static struct video_ops mcde_simple_ops = {
- .video_sync = mcde_simple_video_sync,
- };
- static const struct udevice_id mcde_simple_ids[] = {
- { .compatible = "ste,mcde" },
- { }
- };
- U_BOOT_DRIVER(mcde_simple) = {
- .name = "mcde_simple",
- .id = UCLASS_VIDEO,
- .ops = &mcde_simple_ops,
- .of_match = mcde_simple_ids,
- .probe = mcde_simple_probe,
- .priv_auto = sizeof(struct mcde_simple_priv),
- };
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