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rpi: fix revision scheme parsing
The RPi has two different schemes for encoding board revision values. When adding RPi 2 support, I thought that the conflicting type field values were to be interpreted based on bcm2835-vs-bcm2836. In fact, the scheme bit determines the encoding. The RPi Zero uses the bcm2835 yet uses the new encoding scheme. Fix the code to cater for this correctly. Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
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dbe6f1eb93
commit
c4ea1edb70
1 changed files with 53 additions and 34 deletions
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@ -77,29 +77,33 @@ struct msg_get_clock_rate {
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/*
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* http://raspberryalphaomega.org.uk/2013/02/06/automatic-raspberry-pi-board-revision-detection-model-a-b1-and-b2/
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* http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=32733
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* http://git.drogon.net/?p=wiringPi;a=blob_plain;f=wiringPi/wiringPi.c;hb=5edd177112c99416f68ba3e8c6c4db6ed942e796
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* http://git.drogon.net/?p=wiringPi;a=blob;f=wiringPi/wiringPi.c;h=503151f61014418b9c42f4476a6086f75cd4e64b;hb=refs/heads/master#l922
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*/
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static const struct {
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struct rpi_model {
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const char *name;
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const char *fdtfile;
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bool has_onboard_eth;
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} models[] = {
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[0] = {
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"Unknown model",
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};
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static const struct rpi_model rpi_model_unknown = {
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"Unknown model",
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#ifdef CONFIG_BCM2836
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"bcm2836-rpi-other.dtb",
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"bcm2836-rpi-other.dtb",
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#else
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"bcm2835-rpi-other.dtb",
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"bcm2835-rpi-other.dtb",
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#endif
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false,
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},
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#ifdef CONFIG_BCM2836
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false,
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};
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static const struct rpi_model rpi_models_new_scheme[] = {
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[0x4] = {
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"2 Model B",
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"bcm2836-rpi-2-b.dtb",
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true,
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},
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#else
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};
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static const struct rpi_model rpi_models_old_scheme[] = {
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[0x2] = {
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"Model B (no P5)",
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"bcm2835-rpi-b-i2c0.dtb",
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@ -185,10 +189,12 @@ static const struct {
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"bcm2835-rpi-a-plus.dtb",
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false,
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},
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#endif
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};
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u32 rpi_board_rev = 0;
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static uint32_t revision;
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static uint32_t rev_scheme;
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static uint32_t rev_type;
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static const struct rpi_model *model;
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int dram_init(void)
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{
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@ -216,7 +222,7 @@ static void set_fdtfile(void)
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if (getenv("fdtfile"))
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return;
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fdtfile = models[rpi_board_rev].fdtfile;
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fdtfile = model->fdtfile;
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setenv("fdtfile", fdtfile);
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}
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@ -225,7 +231,7 @@ static void set_usbethaddr(void)
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ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1);
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int ret;
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if (!models[rpi_board_rev].has_onboard_eth)
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if (!model->has_onboard_eth)
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return;
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if (getenv("usbethaddr"))
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@ -249,10 +255,16 @@ static void set_usbethaddr(void)
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#ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
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static void set_board_info(void)
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{
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char str_rev[11];
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sprintf(str_rev, "0x%X", rpi_board_rev);
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setenv("board_rev", str_rev);
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setenv("board_name", models[rpi_board_rev].name);
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char s[11];
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snprintf(s, sizeof(s), "0x%X", revision);
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setenv("board_revision", s);
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snprintf(s, sizeof(s), "%d", rev_scheme);
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setenv("board_rev_scheme", s);
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/* Can't rename this to board_rev_type since it's an ABI for scripts */
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snprintf(s, sizeof(s), "0x%X", rev_type);
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setenv("board_rev", s);
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setenv("board_name", model->name);
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}
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#endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */
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@ -294,7 +306,8 @@ static void get_board_rev(void)
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{
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ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1);
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int ret;
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const char *name;
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const struct rpi_model *models;
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uint32_t models_count;
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BCM2835_MBOX_INIT_HDR(msg);
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BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV);
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@ -317,23 +330,29 @@ static void get_board_rev(void)
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* http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250
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* http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594
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*/
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rpi_board_rev = msg->get_board_rev.body.resp.rev;
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if (rpi_board_rev & 0x800000)
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rpi_board_rev = (rpi_board_rev >> 4) & 0xff;
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else
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rpi_board_rev &= 0xff;
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if (rpi_board_rev >= ARRAY_SIZE(models)) {
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printf("RPI: Board rev %u outside known range\n",
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rpi_board_rev);
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rpi_board_rev = 0;
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revision = msg->get_board_rev.body.resp.rev;
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if (revision & 0x800000) {
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rev_scheme = 1;
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rev_type = (revision >> 4) & 0xff;
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models = rpi_models_new_scheme;
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models_count = ARRAY_SIZE(rpi_models_new_scheme);
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} else {
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rev_scheme = 0;
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rev_type = revision & 0xff;
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models = rpi_models_old_scheme;
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models_count = ARRAY_SIZE(rpi_models_old_scheme);
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}
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if (!models[rpi_board_rev].name) {
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printf("RPI: Board rev %u unknown\n", rpi_board_rev);
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rpi_board_rev = 0;
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if (rev_type >= models_count) {
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printf("RPI: Board rev 0x%x outside known range\n", rev_type);
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model = &rpi_model_unknown;
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} else if (!models[rev_type].name) {
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printf("RPI: Board rev 0x%x unknown\n", rev_type);
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model = &rpi_model_unknown;
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} else {
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model = &models[rev_type];
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}
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name = models[rpi_board_rev].name;
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printf("RPI %s\n", name);
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printf("RPI %s (0x%x)\n", model->name, revision);
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}
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int board_init(void)
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