149 lines
3.1 KiB
C
149 lines
3.1 KiB
C
/*
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* Copyright (C) 2009 Carlo Caione <carlo@carlocaione.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <common.h>
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#include <init.h>
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#include <fs.h>
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#include <linux/stat.h>
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#include <linux/clk.h>
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#include <linux/clkdev.h>
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#include <envfs.h>
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#include <asm/armlinux.h>
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#include <generated/mach-types.h>
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#include <mach/core.h>
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#include <mach/mbox.h>
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struct msg_get_arm_mem {
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struct bcm2835_mbox_hdr hdr;
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struct bcm2835_mbox_tag_get_arm_mem get_arm_mem;
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u32 end_tag;
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};
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struct msg_get_clock_rate {
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struct bcm2835_mbox_hdr hdr;
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struct bcm2835_mbox_tag_get_clock_rate get_clock_rate;
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u32 end_tag;
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};
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static int rpi_get_arm_mem(u32 *size)
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{
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BCM2835_MBOX_STACK_ALIGN(struct msg_get_arm_mem, msg);
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int ret;
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BCM2835_MBOX_INIT_HDR(msg);
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BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY);
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ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
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if (ret)
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return ret;
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*size = msg->get_arm_mem.body.resp.mem_size;
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return 0;
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}
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static int rpi_register_clkdev(u32 clock_id, const char *name)
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{
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BCM2835_MBOX_STACK_ALIGN(struct msg_get_clock_rate, msg);
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struct clk *clk;
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int ret;
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BCM2835_MBOX_INIT_HDR(msg);
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BCM2835_MBOX_INIT_TAG(&msg->get_clock_rate, GET_CLOCK_RATE);
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msg->get_clock_rate.body.req.clock_id = clock_id;
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ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
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if (ret)
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return ret;
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clk = clk_fixed(name, msg->get_clock_rate.body.resp.rate_hz);
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if (IS_ERR(clk))
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return PTR_ERR(clk);
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if (!clk_register_clkdev(clk, NULL, name))
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return -ENODEV;
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return 0;
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}
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static int rpi_mem_init(void)
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{
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u32 size = 0;
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int ret;
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ret = rpi_get_arm_mem(&size);
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if (ret)
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printf("could not query ARM memory size\n");
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bcm2835_add_device_sdram(size);
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return ret;
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}
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mem_initcall(rpi_mem_init);
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static int rpi_console_init(void)
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{
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barebox_set_model("RaspberryPi (BCM2835/ARM1176JZF-S)");
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barebox_set_hostname("rpi");
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bcm2835_register_uart();
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return 0;
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}
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console_initcall(rpi_console_init);
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static int rpi_clock_init(void)
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{
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rpi_register_clkdev(BCM2835_MBOX_CLOCK_ID_EMMC, "bcm2835_mci0");
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return 0;
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}
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postconsole_initcall(rpi_clock_init);
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static int rpi_env_init(void)
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{
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struct stat s;
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const char *diskdev = "/dev/disk0.0";
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int ret;
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device_detect_by_name("mci0");
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ret = stat(diskdev, &s);
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if (ret) {
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printf("no %s. using default env\n", diskdev);
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return 0;
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}
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mkdir("/boot", 0666);
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ret = mount(diskdev, "fat", "/boot", NULL);
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if (ret) {
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printf("failed to mount %s\n", diskdev);
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return 0;
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}
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default_environment_path_set("/boot/barebox.env");
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return 0;
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}
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static int rpi_devices_init(void)
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{
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bcm2835_register_mci();
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bcm2835_register_fb();
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armlinux_set_architecture(MACH_TYPE_BCM2708);
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rpi_env_init();
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return 0;
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}
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late_initcall(rpi_devices_init);
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