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/*
* Copyright (C) 2009 Carlo Caione <carlo@carlocaione.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* 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 <init.h>
#include <fs.h>
#include <linux/stat.h>
#include <linux/clk.h>
#include <linux/clkdev.h>
#include <envfs.h>
#include <asm/armlinux.h>
#include <generated/mach-types.h>
#include <mach/core.h>
#include <mach/mbox.h>
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_get_clock_rate {
struct bcm2835_mbox_hdr hdr;
struct bcm2835_mbox_tag_get_clock_rate get_clock_rate;
u32 end_tag;
};
static int rpi_get_arm_mem(u32 *size)
{
BCM2835_MBOX_STACK_ALIGN(struct msg_get_arm_mem, msg);
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)
return ret;
*size = msg->get_arm_mem.body.resp.mem_size;
return 0;
}
static int rpi_register_clkdev(u32 clock_id, const char *name)
{
BCM2835_MBOX_STACK_ALIGN(struct msg_get_clock_rate, msg);
struct clk *clk;
int ret;
BCM2835_MBOX_INIT_HDR(msg);
BCM2835_MBOX_INIT_TAG(&msg->get_clock_rate, GET_CLOCK_RATE);
msg->get_clock_rate.body.req.clock_id = clock_id;
ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
if (ret)
return ret;
clk = clk_fixed(name, msg->get_clock_rate.body.resp.rate_hz);
if (IS_ERR(clk))
return PTR_ERR(clk);
if (!clk_register_clkdev(clk, NULL, name))
return -ENODEV;
return 0;
}
static int rpi_mem_init(void)
{
u32 size = 0;
int ret;
ret = rpi_get_arm_mem(&size);
if (ret)
printf("could not query ARM memory size\n");
bcm2835_add_device_sdram(size);
return ret;
}
mem_initcall(rpi_mem_init);
static int rpi_console_init(void)
{
barebox_set_model("RaspberryPi (BCM2835/ARM1176JZF-S)");
barebox_set_hostname("rpi");
bcm2835_register_uart();
return 0;
}
console_initcall(rpi_console_init);
static int rpi_clock_init(void)
{
rpi_register_clkdev(BCM2835_MBOX_CLOCK_ID_EMMC, "bcm2835_mci0");
return 0;
}
postconsole_initcall(rpi_clock_init);
static int rpi_env_init(void)
{
struct stat s;
const char *diskdev = "/dev/disk0.0";
int ret;
device_detect_by_name("mci0");
ret = stat(diskdev, &s);
if (ret) {
printf("no %s. using default env\n", diskdev);
return 0;
}
mkdir("/boot", 0666);
ret = mount(diskdev, "fat", "/boot");
if (ret) {
printf("failed to mount %s\n", diskdev);
return 0;
}
default_environment_path_set("/boot/barebox.env");
return 0;
}
static int rpi_devices_init(void)
{
bcm2835_register_mci();
bcm2835_register_fb();
armlinux_set_architecture(MACH_TYPE_BCM2708);
rpi_env_init();
return 0;
}
late_initcall(rpi_devices_init);
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