[src/trunk]: src/sys/arch/arm/sunxi Enable MMC HS200 on sun50i-a64

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

details:   https://anonhg.NetBSD.org/src/rev/bead9cb7e0e8
branches:  trunk
changeset: 319123:bead9cb7e0e8
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Thu May 17 23:07:47 2018 +0000

description:
Enable MMC HS200 on sun50i-a64

diffstat:

 sys/arch/arm/sunxi/sunxi_mmc.c |  67 ++++++++++++++++++++++++++++++-----------
 1 files changed, 49 insertions(+), 18 deletions(-)

diffs (158 lines):

diff -r 30f1ea0851fe -r bead9cb7e0e8 sys/arch/arm/sunxi/sunxi_mmc.c
--- a/sys/arch/arm/sunxi/sunxi_mmc.c    Thu May 17 19:08:51 2018 +0000
+++ b/sys/arch/arm/sunxi/sunxi_mmc.c    Thu May 17 23:07:47 2018 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: sunxi_mmc.c,v 1.22 2018/04/15 18:24:52 jmcneill Exp $ */
+/* $NetBSD: sunxi_mmc.c,v 1.23 2018/05/17 23:07:47 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2014-2017 Jared McNeill <jmcneill%invisible.ca@localhost>
@@ -29,7 +29,7 @@
 #include "opt_sunximmc.h"
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: sunxi_mmc.c,v 1.22 2018/04/15 18:24:52 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: sunxi_mmc.c,v 1.23 2018/05/17 23:07:47 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/bus.h>
@@ -109,6 +109,7 @@
 static int     sunxi_mmc_bus_width(sdmmc_chipset_handle_t, int);
 static int     sunxi_mmc_bus_rod(sdmmc_chipset_handle_t, int);
 static int     sunxi_mmc_signal_voltage(sdmmc_chipset_handle_t, int);
+static int     sunxi_mmc_execute_tuning(sdmmc_chipset_handle_t, int);
 static void    sunxi_mmc_exec_command(sdmmc_chipset_handle_t,
                                      struct sdmmc_command *);
 static void    sunxi_mmc_card_enable_intr(sdmmc_chipset_handle_t, int);
@@ -125,6 +126,7 @@
        .bus_width = sunxi_mmc_bus_width,
        .bus_rod = sunxi_mmc_bus_rod,
        .signal_voltage = sunxi_mmc_signal_voltage,
+       .execute_tuning = sunxi_mmc_execute_tuning,
        .exec_command = sunxi_mmc_exec_command,
        .card_enable_intr = sunxi_mmc_card_enable_intr,
        .card_intr_ack = sunxi_mmc_card_intr_ack,
@@ -136,6 +138,7 @@
 #define        SUNXI_MMC_FLAG_CALIB_REG        0x01
 #define        SUNXI_MMC_FLAG_NEW_TIMINGS      0x02
 #define        SUNXI_MMC_FLAG_MASK_DATA0       0x04
+#define        SUNXI_MMC_FLAG_HS200            0x08
        const struct sunxi_mmc_delay *delays;
        uint32_t dma_ftrglevel;
 };
@@ -155,6 +158,8 @@
        int sc_mmc_width;
        int sc_mmc_present;
 
+       u_int sc_max_frequency;
+
        device_t sc_sdmmc_dev;
 
        struct sunxi_mmc_config *sc_config;
@@ -249,7 +254,8 @@
        .idma_xferlen = 0x2000,
        .dma_ftrglevel = 0x20070008,
        .delays = NULL,
-       .flags = SUNXI_MMC_FLAG_CALIB_REG,
+       .flags = SUNXI_MMC_FLAG_CALIB_REG |
+                SUNXI_MMC_FLAG_HS200,
 };
 
 static const struct sunxi_mmc_config sun50i_h6_mmc_config = {
@@ -366,6 +372,9 @@
        sc->sc_non_removable = of_hasprop(phandle, "non-removable");
        sc->sc_broken_cd = of_hasprop(phandle, "broken-cd");
 
+       if (of_getprop_uint32(phandle, "max-frequency", &sc->sc_max_frequency))
+               sc->sc_max_frequency = 52000000;
+
        if (sunxi_mmc_dmabounce_setup(sc) != 0 ||
            sunxi_mmc_idma_setup(sc) != 0) {
                aprint_error_dev(self, "failed to setup DMA\n");
@@ -468,20 +477,26 @@
        const struct sunxi_mmc_delay *delays;
        int error, timing;
 
-       if (freq <= 400) {
-               timing = SUNXI_MMC_TIMING_400K;
-       } else if (freq <= 25000) {
-               timing = SUNXI_MMC_TIMING_25M;
-       } else if (freq <= 52000) {
-               if (ddr) {
-                       timing = sc->sc_mmc_width == 8 ?
-                           SUNXI_MMC_TIMING_50M_DDR_8BIT :
-                           SUNXI_MMC_TIMING_50M_DDR;
-               } else {
-                       timing = SUNXI_MMC_TIMING_50M;
-               }
-       } else
-               return EINVAL;
+       if (sc->sc_config->delays) {
+               if (freq <= 400) {
+                       timing = SUNXI_MMC_TIMING_400K;
+               } else if (freq <= 25000) {
+                       timing = SUNXI_MMC_TIMING_25M;
+               } else if (freq <= 52000) {
+                       if (ddr) {
+                               timing = sc->sc_mmc_width == 8 ?
+                                   SUNXI_MMC_TIMING_50M_DDR_8BIT :
+                                   SUNXI_MMC_TIMING_50M_DDR;
+                       } else {
+                               timing = SUNXI_MMC_TIMING_50M;
+                       }
+               } else
+                       return EINVAL;
+       }
+       if (sc->sc_max_frequency) {
+               if (freq * 1000 > sc->sc_max_frequency)
+                       return EINVAL;
+       }
 
        error = clk_set_rate(sc->sc_clk_mmc, (freq * 1000) << ddr);
        if (error != 0)
@@ -510,6 +525,7 @@
 sunxi_mmc_attach_i(device_t self)
 {
        struct sunxi_mmc_softc *sc = device_private(self);
+       const u_int flags = sc->sc_config->flags;
        struct sdmmcbus_attach_args saa;
        uint32_t width;
 
@@ -532,7 +548,7 @@
        saa.saa_sch = sc;
        saa.saa_dmat = sc->sc_dmat;
        saa.saa_clkmin = 400;
-       saa.saa_clkmax = 52000;
+       saa.saa_clkmax = sc->sc_max_frequency / 1000;
        saa.saa_caps = SMC_CAPS_DMA |
                       SMC_CAPS_MULTI_SEG_DMA |
                       SMC_CAPS_AUTO_STOP |
@@ -540,6 +556,8 @@
                       SMC_CAPS_MMC_HIGHSPEED |
                       SMC_CAPS_MMC_DDR52 |
                       SMC_CAPS_POLLING;
+       if (flags & SUNXI_MMC_FLAG_HS200)
+               saa.saa_caps |= SMC_CAPS_MMC_HS200;
        if (width == 4)
                saa.saa_caps |= SMC_CAPS_4BIT_MODE;
        if (width == 8)
@@ -894,6 +912,19 @@
 }
 
 static int
+sunxi_mmc_execute_tuning(sdmmc_chipset_handle_t sch, int timing)
+{
+       switch (timing) {
+       case SDMMC_TIMING_MMC_HS200:
+               break;
+       default:
+               return EINVAL;
+       }
+
+       return 0;
+}
+
+static int
 sunxi_mmc_dma_prepare(struct sunxi_mmc_softc *sc, struct sdmmc_command *cmd)
 {
        struct sunxi_mmc_idma_descriptor *dma = sc->sc_idma_desc;