ssdfb: add support for SSD1306 and SH1106 at spi attachment
Only support the 4-wire mode for now. Support for 3-wire mode is theoretically possible but most (all?) modules in circulation have the BS0 / IM0 3-wire config pin internally grounded within the flat-flex assembly so it is not easy to enable & test.
This commit is contained in:
tnn
parent
99a5114ced
commit
d75f2246b3
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@ -1,4 +1,4 @@
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/* $NetBSD: ssdfb_spi.c,v 1.10 2021/08/19 11:04:21 tnn Exp $ */
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/* $NetBSD: ssdfb_spi.c,v 1.11 2021/08/19 17:50:18 tnn Exp $ */
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/*
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* Copyright (c) 2019 The NetBSD Foundation, Inc.
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@ -30,7 +30,7 @@
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: ssdfb_spi.c,v 1.10 2021/08/19 11:04:21 tnn Exp $");
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__KERNEL_RCSID(0, "$NetBSD: ssdfb_spi.c,v 1.11 2021/08/19 17:50:18 tnn Exp $");
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#include <sys/param.h>
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#include <sys/device.h>
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@ -70,6 +70,10 @@ static int ssdfb_spi_xfer_rect_3wire_ssd1322(void *, uint8_t, uint8_t,
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uint8_t, uint8_t, uint8_t *, size_t, bool);
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static int ssdfb_spi_cmd_4wire(void *, uint8_t *, size_t, bool);
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static int ssdfb_spi_xfer_rect_4wire_sh1106(void *, uint8_t, uint8_t,
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uint8_t, uint8_t, uint8_t *, size_t, bool);
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static int ssdfb_spi_xfer_rect_4wire_ssd1306(void *, uint8_t, uint8_t,
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uint8_t, uint8_t, uint8_t *, size_t, bool);
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static int ssdfb_spi_xfer_rect_4wire_ssd1322(void *, uint8_t, uint8_t,
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uint8_t, uint8_t, uint8_t *, size_t, bool);
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static int ssdfb_spi_xfer_rect_4wire_ssd1353(void *, uint8_t, uint8_t,
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@ -87,6 +91,7 @@ CFATTACH_DECL_NEW(ssdfb_spi, sizeof(struct ssdfb_spi_softc),
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static const struct device_compatible_entry compat_data[] = {
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{ .compat = "solomon,ssd1306", .value = SSDFB_PRODUCT_SSD1306_GENERIC },
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{ .compat = "sino,sh1106", .value = SSDFB_PRODUCT_SH1106_GENERIC },
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{ .compat = "solomon,ssd1322", .value = SSDFB_PRODUCT_SSD1322_GENERIC },
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{ .compat = "solomon,ssd1353", .value = SSDFB_PRODUCT_SSD1353_GENERIC },
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{ .compat = "dep160128a", .value = SSDFB_PRODUCT_DEP_160128A_RGB },
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@ -165,6 +170,20 @@ ssdfb_spi_attach(device_t parent, device_t self, void *aux)
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: ssdfb_spi_cmd_4wire;
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switch (flags & SSDFB_ATTACH_FLAG_PRODUCT_MASK) {
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case SSDFB_PRODUCT_SH1106_GENERIC:
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sc->sc.sc_transfer_rect = sc->sc_3wiremode
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? NULL
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: ssdfb_spi_xfer_rect_4wire_sh1106;
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sc->sc_padding_cmd = SSDFB_CMD_NOP;
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sc->sc_late_dc_deassert = true;
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break;
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case SSDFB_PRODUCT_SSD1306_GENERIC:
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sc->sc.sc_transfer_rect = sc->sc_3wiremode
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? NULL
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: ssdfb_spi_xfer_rect_4wire_ssd1306;
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sc->sc_padding_cmd = SSDFB_CMD_NOP;
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sc->sc_late_dc_deassert = true;
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break;
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case SSDFB_PRODUCT_SSD1322_GENERIC:
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sc->sc.sc_transfer_rect = sc->sc_3wiremode
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? ssdfb_spi_xfer_rect_3wire_ssd1322
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@ -215,7 +234,6 @@ ssdfb_spi_xfer_rect_3wire_ssd1322(void *cookie, uint8_t fromcol, uint8_t tocol,
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struct ssdfb_spi_softc *sc = (struct ssdfb_spi_softc *)cookie;
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uint8_t bitstream[128 * 9 / 8];
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struct bs_state s;
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uint8_t row;
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size_t rlen = (tocol + 1 - fromcol) * 2;
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int error;
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@ -239,13 +257,14 @@ ssdfb_spi_xfer_rect_3wire_ssd1322(void *cookie, uint8_t fromcol, uint8_t tocol,
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return error;
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KASSERT(rlen <= 128);
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for (row = fromrow; row <= torow; row++) {
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while (fromrow <= torow) {
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ssdfb_bitstream_init(&s, bitstream);
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ssdfb_bitstream_append_data(&s, p, rlen);
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ssdfb_bitstream_final(&s, sc->sc_padding_cmd);
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error = spi_send(sc->sc_sh, s.cur - s.base, bitstream);
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if (error)
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return error;
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fromrow++;
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p += stride;
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}
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@ -333,20 +352,87 @@ ssdfb_spi_cmd_4wire(void *cookie, uint8_t *cmd, size_t len, bool usepoll)
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return 0;
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}
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static int
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ssdfb_spi_xfer_rect_4wire_sh1106(void *cookie, uint8_t fromcol, uint8_t tocol,
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uint8_t frompage, uint8_t topage, uint8_t *p, size_t stride, bool usepoll)
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{
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struct ssdfb_spi_softc *sc = (struct ssdfb_spi_softc *)cookie;
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size_t rlen = tocol + 1 - fromcol;
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int error;
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uint8_t cmd[] = {
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SSDFB_CMD_SET_PAGE_START_ADDRESS_BASE + frompage,
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SSDFB_CMD_SET_HIGHER_COLUMN_START_ADDRESS_BASE + (fromcol >> 4),
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SSDFB_CMD_SET_LOWER_COLUMN_START_ADDRESS_BASE + (fromcol & 0xf)
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};
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if (usepoll && !cold)
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return 0;
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while (frompage <= topage) {
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cmd[0] = SSDFB_CMD_SET_PAGE_START_ADDRESS_BASE + frompage;
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ssdfb_spi_4wire_set_dc(sc, 0);
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error = spi_send(sc->sc_sh, sizeof(cmd), cmd);
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if (error)
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return error;
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ssdfb_spi_4wire_set_dc(sc, 1);
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error = spi_send(sc->sc_sh, rlen, p);
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if (error)
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return error;
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frompage++;
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p += stride;
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}
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return 0;
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}
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static int
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ssdfb_spi_xfer_rect_4wire_ssd1306(void *cookie, uint8_t fromcol, uint8_t tocol,
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uint8_t frompage, uint8_t topage, uint8_t *p, size_t stride, bool usepoll)
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{
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struct ssdfb_spi_softc *sc = (struct ssdfb_spi_softc *)cookie;
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size_t rlen = tocol + 1 - fromcol;
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int error;
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uint8_t cmd[] = {
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SSD1306_CMD_SET_MEMORY_ADDRESSING_MODE,
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SSD1306_MEMORY_ADDRESSING_MODE_HORIZONTAL,
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SSD1306_CMD_SET_COLUMN_ADDRESS,
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fromcol,
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tocol,
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SSD1306_CMD_SET_PAGE_ADDRESS,
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frompage,
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topage
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};
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if (usepoll && !cold)
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return 0;
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ssdfb_spi_4wire_set_dc(sc, 0);
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error = spi_send(sc->sc_sh, sizeof(cmd), cmd);
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if (error)
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return error;
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ssdfb_spi_4wire_set_dc(sc, 1);
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while (frompage <= topage) {
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error = spi_send(sc->sc_sh, rlen, p);
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if (error)
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return error;
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frompage++;
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p += stride;
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}
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return 0;
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}
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static int
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ssdfb_spi_xfer_rect_4wire_ssd1322(void *cookie, uint8_t fromcol, uint8_t tocol,
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uint8_t fromrow, uint8_t torow, uint8_t *p, size_t stride, bool usepoll)
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{
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struct ssdfb_spi_softc *sc = (struct ssdfb_spi_softc *)cookie;
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uint8_t row;
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size_t rlen = (tocol + 1 - fromcol) * 2;
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int error;
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uint8_t cmd;
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uint8_t data[2];
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/*
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* Unlike iic(4), there is no way to force spi(4) to use polling.
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*/
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if (usepoll && !cold)
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return 0;
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@ -381,10 +467,11 @@ ssdfb_spi_xfer_rect_4wire_ssd1322(void *cookie, uint8_t fromcol, uint8_t tocol,
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return error;
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ssdfb_spi_4wire_set_dc(sc, 1);
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for (row = fromrow; row <= torow; row++) {
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while (fromrow <= torow) {
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error = spi_send(sc->sc_sh, rlen, p);
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if (error)
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return error;
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fromrow++;
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p += stride;
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}
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@ -396,7 +483,6 @@ ssdfb_spi_xfer_rect_4wire_ssd1353(void *cookie, uint8_t fromcol, uint8_t tocol,
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uint8_t fromrow, uint8_t torow, uint8_t *p, size_t stride, bool usepoll)
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{
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struct ssdfb_spi_softc *sc = (struct ssdfb_spi_softc *)cookie;
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uint8_t row;
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size_t rlen = (tocol + 1 - fromcol) * 3;
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uint8_t bitstream[160 * 3];
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uint8_t *dstp, *srcp, *endp;
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@ -404,9 +490,6 @@ ssdfb_spi_xfer_rect_4wire_ssd1353(void *cookie, uint8_t fromcol, uint8_t tocol,
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uint8_t cmd;
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uint8_t data[2];
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/*
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* Unlike iic(4), there is no way to force spi(4) to use polling.
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*/
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if (usepoll && !cold)
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return 0;
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@ -447,7 +530,7 @@ ssdfb_spi_xfer_rect_4wire_ssd1353(void *cookie, uint8_t fromcol, uint8_t tocol,
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ssdfb_spi_4wire_set_dc(sc, 1);
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KASSERT(rlen <= sizeof(bitstream));
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for (row = fromrow; row <= torow; row++) {
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while (fromrow <= torow) {
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/* downconvert each row from 32bpp rgba to 18bpp panel format */
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dstp = bitstream;
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endp = dstp + rlen;
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@ -461,6 +544,7 @@ ssdfb_spi_xfer_rect_4wire_ssd1353(void *cookie, uint8_t fromcol, uint8_t tocol,
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error = spi_send(sc->sc_sh, rlen, bitstream);
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if (error)
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return error;
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fromrow++;
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p += stride;
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}
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