diff options
Diffstat (limited to 'roms/u-boot/board/raspberrypi')
| -rw-r--r-- | roms/u-boot/board/raspberrypi/rpi_b/Makefile | 15 | ||||
| -rw-r--r-- | roms/u-boot/board/raspberrypi/rpi_b/rpi_b.c | 123 |
2 files changed, 138 insertions, 0 deletions
diff --git a/roms/u-boot/board/raspberrypi/rpi_b/Makefile b/roms/u-boot/board/raspberrypi/rpi_b/Makefile new file mode 100644 index 00000000..7e9bfbff --- /dev/null +++ b/roms/u-boot/board/raspberrypi/rpi_b/Makefile @@ -0,0 +1,15 @@ +# +# See file CREDITS for list of people who contributed to this +# project. +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License +# version 2 as published by the Free Software Foundation. +# +# This program is distributed in the hope that it will be useful, but +# WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# + +obj-y := rpi_b.o diff --git a/roms/u-boot/board/raspberrypi/rpi_b/rpi_b.c b/roms/u-boot/board/raspberrypi/rpi_b/rpi_b.c new file mode 100644 index 00000000..f33fae91 --- /dev/null +++ b/roms/u-boot/board/raspberrypi/rpi_b/rpi_b.c @@ -0,0 +1,123 @@ +/* + * (C) Copyright 2012-2013 Stephen Warren + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <common.h> +#include <config.h> +#include <lcd.h> +#include <asm/arch/mbox.h> +#include <asm/arch/sdhci.h> +#include <asm/global_data.h> + +DECLARE_GLOBAL_DATA_PTR; + +struct msg_get_arm_mem { + struct bcm2835_mbox_hdr hdr; + struct bcm2835_mbox_tag_get_arm_mem get_arm_mem; + u32 end_tag; +}; + +struct msg_set_power_state { + struct bcm2835_mbox_hdr hdr; + struct bcm2835_mbox_tag_set_power_state set_power_state; + u32 end_tag; +}; + +struct msg_get_clock_rate { + struct bcm2835_mbox_hdr hdr; + struct bcm2835_mbox_tag_get_clock_rate get_clock_rate; + u32 end_tag; +}; + +int dram_init(void) +{ + ALLOC_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1, 16); + int ret; + + BCM2835_MBOX_INIT_HDR(msg); + BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY); + + ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); + if (ret) { + printf("bcm2835: Could not query ARM memory size\n"); + return -1; + } + + gd->ram_size = msg->get_arm_mem.body.resp.mem_size; + + return 0; +} + +static int power_on_module(u32 module) +{ + ALLOC_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1, 16); + int ret; + + BCM2835_MBOX_INIT_HDR(msg_pwr); + BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state, + SET_POWER_STATE); + msg_pwr->set_power_state.body.req.device_id = module; + msg_pwr->set_power_state.body.req.state = + BCM2835_MBOX_SET_POWER_STATE_REQ_ON | + BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT; + + ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, + &msg_pwr->hdr); + if (ret) { + printf("bcm2835: Could not set module %u power state\n", + module); + return -1; + } + + return 0; +} + +int board_init(void) +{ + gd->bd->bi_boot_params = 0x100; + + return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD); +} + +int board_mmc_init(void) +{ + ALLOC_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1, 16); + int ret; + + power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI); + + BCM2835_MBOX_INIT_HDR(msg_clk); + BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE); + msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC; + + ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr); + if (ret) { + printf("bcm2835: Could not query eMMC clock rate\n"); + return -1; + } + + return bcm2835_sdhci_init(BCM2835_SDHCI_BASE, + msg_clk->get_clock_rate.body.resp.rate_hz); +} + +void ft_board_setup(void *blob, bd_t *bd) +{ + /* + * For now, we simply always add the simplefb DT node. Later, we + * should be more intelligent, and e.g. only do this if no enabled DT + * node exists for the "real" graphics driver. + */ + lcd_dt_simplefb_add_node(blob); +} |