[src/trunk]: src/sys/dev/spi ssdfb: support SSD1353 at spi(4)

[tnn <tnn%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/ec7980e8103b
branches:  trunk
changeset: 1022760:ec7980e8103b
user:      tnn <tnn%NetBSD.org@localhost>
date:      Thu Aug 05 19:08:59 2021 +0000

description:
ssdfb: support SSD1353 at spi(4)

diffstat:

 sys/dev/spi/ssdfb_spi.c |  116 +++++++++++++++++++++++++++++++++++++++++------
 1 files changed, 100 insertions(+), 16 deletions(-)

diffs (163 lines):

diff -r 17574e2f1317 -r ec7980e8103b sys/dev/spi/ssdfb_spi.c
--- a/sys/dev/spi/ssdfb_spi.c   Thu Aug 05 19:07:09 2021 +0000
+++ b/sys/dev/spi/ssdfb_spi.c   Thu Aug 05 19:08:59 2021 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: ssdfb_spi.c,v 1.7 2021/08/03 11:30:25 tnn Exp $ */
+/* $NetBSD: ssdfb_spi.c,v 1.8 2021/08/05 19:08:59 tnn Exp $ */
 
 /*
  * Copyright (c) 2019 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ssdfb_spi.c,v 1.7 2021/08/03 11:30:25 tnn Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ssdfb_spi.c,v 1.8 2021/08/05 19:08:59 tnn Exp $");
 
 #include <sys/param.h>
 #include <sys/device.h>
@@ -70,6 +70,8 @@
 static int     ssdfb_spi_cmd_4wire(void *, uint8_t *, size_t, bool);
 static int     ssdfb_spi_xfer_rect_4wire_ssd1322(void *, uint8_t, uint8_t,
                    uint8_t, uint8_t, uint8_t *, size_t, bool);
+static int     ssdfb_spi_xfer_rect_4wire_ssd1353(void *, uint8_t, uint8_t,
+                   uint8_t, uint8_t, uint8_t *, size_t, bool);
 
 static void    ssdfb_bitstream_init(struct bs_state *, uint8_t *);
 static void    ssdfb_bitstream_append(struct bs_state *, uint8_t, uint8_t);
@@ -84,6 +86,8 @@
 static const struct device_compatible_entry compat_data[] = {
        { .compat = "solomon,ssd1306",  .value = SSDFB_PRODUCT_SSD1306_GENERIC },
        { .compat = "solomon,ssd1322",  .value = SSDFB_PRODUCT_SSD1322_GENERIC },
+       { .compat = "solomon,ssd1353",  .value = SSDFB_PRODUCT_SSD1353_GENERIC },
+       { .compat = "dep160128a",       .value = SSDFB_PRODUCT_DEP_160128A_RGB },
        DEVICE_COMPAT_EOL
 };
 
@@ -154,28 +158,32 @@
        sc->sc_3wiremode = true;
 #endif
 
+       sc->sc.sc_cmd = sc->sc_3wiremode
+           ? ssdfb_spi_cmd_3wire
+           : ssdfb_spi_cmd_4wire;
+
        switch (flags & SSDFB_ATTACH_FLAG_PRODUCT_MASK) {
        case SSDFB_PRODUCT_SSD1322_GENERIC:
-               if (sc->sc_3wiremode) {
-                       sc->sc.sc_transfer_rect =
-                           ssdfb_spi_xfer_rect_3wire_ssd1322;
-               } else {
-                       sc->sc.sc_transfer_rect =
-                           ssdfb_spi_xfer_rect_4wire_ssd1322;
-               }
+               sc->sc.sc_transfer_rect = sc->sc_3wiremode
+                   ? ssdfb_spi_xfer_rect_3wire_ssd1322
+                   : ssdfb_spi_xfer_rect_4wire_ssd1322;
                break;
-       default:
-               panic("ssdfb_spi_attach: product not implemented");
+       case SSDFB_PRODUCT_SSD1353_GENERIC:
+       case SSDFB_PRODUCT_DEP_160128A_RGB:
+               sc->sc.sc_transfer_rect = sc->sc_3wiremode
+                   ? NULL /* not supported here */
+                   : ssdfb_spi_xfer_rect_4wire_ssd1353;
+               break;
        }
-       if (sc->sc_3wiremode) {
-               sc->sc.sc_cmd = ssdfb_spi_cmd_3wire;
-       } else {
-               sc->sc.sc_cmd = ssdfb_spi_cmd_4wire;
+
+       if (!sc->sc.sc_transfer_rect) {
+               aprint_error(": sc_transfer_rect not implemented\n");
+               return;
        }
 
        ssdfb_attach(&sc->sc, flags);
 
-       device_printf(sc->sc.sc_dev, "%d-wire SPI interface\n",
+       aprint_normal_dev(self, "%d-wire SPI interface\n",
            sc->sc_3wiremode == true ? 3 : 4);
 }
 
@@ -381,3 +389,79 @@
 
        return 0;
 }
+
+static int
+ssdfb_spi_xfer_rect_4wire_ssd1353(void *cookie, uint8_t fromcol, uint8_t tocol,
+    uint8_t fromrow, uint8_t torow, uint8_t *p, size_t stride, bool usepoll)
+{
+       struct ssdfb_spi_softc *sc = (struct ssdfb_spi_softc *)cookie;
+       uint8_t row;
+       size_t rlen = (tocol + 1 - fromcol) * 3;
+       uint8_t bitstream[160 * 3];
+       uint8_t *dstp, *srcp, *endp;
+       int error;
+       uint8_t cmd;
+       uint8_t data[2];
+
+       /*
+        * Unlike iic(4), there is no way to force spi(4) to use polling.
+        */
+       if (usepoll && !cold)
+               return 0;
+
+       ssdfb_spi_4wire_set_dc(sc, 0);
+       cmd = SSD1322_CMD_SET_ROW_ADDRESS;
+       error = spi_send(sc->sc_sh, sizeof(cmd), &cmd);
+       if (error)
+               return error;
+       ssdfb_spi_4wire_set_dc(sc, 1);
+       data[0] = fromrow;
+       data[1] = torow;
+       if (sc->sc.sc_upsidedown) {
+               /* fix picture outside frame on 160x128 panel */
+               data[0] += 132 - sc->sc.sc_p->p_height;
+               data[1] += 132 - sc->sc.sc_p->p_height;
+       }
+       error = spi_send(sc->sc_sh, sizeof(data), data);
+       if (error)
+               return error;
+
+       ssdfb_spi_4wire_set_dc(sc, 0);
+       cmd = SSD1322_CMD_SET_COLUMN_ADDRESS;
+       error = spi_send(sc->sc_sh, sizeof(cmd), &cmd);
+       if (error)
+               return error;
+       ssdfb_spi_4wire_set_dc(sc, 1);
+       data[0] = fromcol;
+       data[1] = tocol;
+       error = spi_send(sc->sc_sh, sizeof(data), data);
+       if (error)
+               return error;
+
+       ssdfb_spi_4wire_set_dc(sc, 0);
+       cmd = SSD1322_CMD_WRITE_RAM;
+       error = spi_send(sc->sc_sh, sizeof(cmd), &cmd);
+       if (error)
+               return error;
+
+       ssdfb_spi_4wire_set_dc(sc, 1);
+       KASSERT(rlen <= sizeof(bitstream));
+       for (row = fromrow; row <= torow; row++) {
+               /* downconvert each row from 32bpp rgba to 18bpp panel format */
+               dstp = bitstream;
+               endp = dstp + rlen;
+               srcp = p;
+               while (dstp < endp) {
+                       *dstp++ = (*srcp++) >> 2;
+                       *dstp++ = (*srcp++) >> 2;
+                       *dstp++ = (*srcp++) >> 2;
+                       srcp++;
+               }
+               error = spi_send(sc->sc_sh, rlen, bitstream);
+               if (error)
+                       return error;
+               p += stride;
+       }
+
+       return 0;
+}