xref: /openbmc/u-boot/include/configs/rpi.h (revision 0a6eac842ea288411309cebdc4e72ff59ea6c5ee)
1 /*
2  * (C) Copyright 2012-2016 Stephen Warren
3  *
4  * SPDX-License-Identifier:	GPL-2.0
5  */
6 
7 #ifndef __CONFIG_H
8 #define __CONFIG_H
9 
10 #include <linux/sizes.h>
11 #include <asm/arch/timer.h>
12 
13 #if defined(CONFIG_TARGET_RPI_2) || defined(CONFIG_TARGET_RPI_3_32B)
14 #define CONFIG_SKIP_LOWLEVEL_INIT
15 #endif
16 
17 /* Architecture, CPU, etc.*/
18 #define CONFIG_ARCH_CPU_INIT
19 #define CONFIG_BOARD_EARLY_INIT_F
20 
21 /* Use SoC timer for AArch32, but architected timer for AArch64 */
22 #ifndef CONFIG_ARM64
23 #define CONFIG_SYS_TIMER_RATE		1000000
24 #define CONFIG_SYS_TIMER_COUNTER	\
25 	(&((struct bcm2835_timer_regs *)BCM2835_TIMER_PHYSADDR)->clo)
26 #endif
27 
28 /*
29  * 2835 is a SKU in a series for which the 2708 is the first or primary SoC,
30  * so 2708 has historically been used rather than a dedicated 2835 ID.
31  *
32  * We don't define a machine type for bcm2709/bcm2836 since the RPi Foundation
33  * chose to use someone else's previously registered machine ID (3139, MX51_GGC)
34  * rather than obtaining a valid ID:-/
35  *
36  * For the bcm2837, hopefully a machine type is not needed, since everything
37  * is DT.
38  */
39 #ifdef CONFIG_BCM2835
40 #define CONFIG_MACH_TYPE		MACH_TYPE_BCM2708
41 #endif
42 
43 /* Memory layout */
44 #define CONFIG_NR_DRAM_BANKS		1
45 #define CONFIG_SYS_SDRAM_BASE		0x00000000
46 #ifdef CONFIG_ARM64
47 #define CONFIG_SYS_TEXT_BASE		0x00080000
48 #else
49 #define CONFIG_SYS_TEXT_BASE		0x00008000
50 #endif
51 #define CONFIG_SYS_UBOOT_BASE		CONFIG_SYS_TEXT_BASE
52 /*
53  * The board really has 256M. However, the VC (VideoCore co-processor) shares
54  * the RAM, and uses a configurable portion at the top. We tell U-Boot that a
55  * smaller amount of RAM is present in order to avoid stomping on the area
56  * the VC uses.
57  */
58 #define CONFIG_SYS_SDRAM_SIZE		SZ_128M
59 #define CONFIG_SYS_INIT_SP_ADDR		(CONFIG_SYS_SDRAM_BASE + \
60 					 CONFIG_SYS_SDRAM_SIZE - \
61 					 GENERATED_GBL_DATA_SIZE)
62 #define CONFIG_SYS_MALLOC_LEN		SZ_4M
63 #define CONFIG_SYS_MEMTEST_START	0x00100000
64 #define CONFIG_SYS_MEMTEST_END		0x00200000
65 #define CONFIG_LOADADDR			0x00200000
66 
67 /* Flash */
68 #define CONFIG_SYS_NO_FLASH
69 
70 /* Devices */
71 /* GPIO */
72 #define CONFIG_BCM2835_GPIO
73 /* LCD */
74 #define CONFIG_LCD_DT_SIMPLEFB
75 #define LCD_BPP				LCD_COLOR16
76 /*
77  * Prevent allocation of RAM for FB; the real FB address is queried
78  * dynamically from the VideoCore co-processor, and comes from RAM
79  * not owned by the ARM CPU.
80  */
81 #define CONFIG_FB_ADDR			0
82 #define CONFIG_VIDEO_BCM2835
83 #define CONFIG_SYS_WHITE_ON_BLACK
84 #define CONFIG_CONSOLE_SCROLL_LINES	10
85 
86 /* SD/MMC configuration */
87 #define CONFIG_GENERIC_MMC
88 #define CONFIG_MMC
89 #define CONFIG_SDHCI
90 #define CONFIG_MMC_SDHCI_IO_ACCESSORS
91 #define CONFIG_BCM2835_SDHCI
92 
93 #ifdef CONFIG_CMD_USB
94 #define CONFIG_USB_DWC2
95 #ifndef CONFIG_BCM2835
96 #define CONFIG_USB_DWC2_REG_ADDR 0x3f980000
97 #else
98 #define CONFIG_USB_DWC2_REG_ADDR 0x20980000
99 #endif
100 #define CONFIG_USB_HOST_ETHER
101 #define CONFIG_USB_ETHER_SMSC95XX
102 #define CONFIG_TFTP_TSIZE
103 #define CONFIG_MISC_INIT_R
104 #define CONFIG_USB_KEYBOARD
105 #define CONFIG_SYS_USB_EVENT_POLL
106 #define CONFIG_SYS_STDIO_DEREGISTER
107 #endif
108 
109 /* Console UART */
110 #ifdef CONFIG_BCM2837
111 #define CONFIG_BCM283X_MU_SERIAL
112 #else
113 #define CONFIG_PL01X_SERIAL
114 #endif
115 #define CONFIG_CONS_INDEX		0
116 #define CONFIG_BAUDRATE			115200
117 
118 /* Console configuration */
119 #define CONFIG_SYS_CBSIZE		1024
120 #define CONFIG_SYS_PBSIZE		(CONFIG_SYS_CBSIZE +		\
121 					 sizeof(CONFIG_SYS_PROMPT) + 16)
122 
123 /* Environment */
124 #define CONFIG_ENV_SIZE			SZ_16K
125 #define CONFIG_ENV_IS_IN_FAT
126 #define FAT_ENV_INTERFACE		"mmc"
127 #define FAT_ENV_DEVICE_AND_PART		"0:1"
128 #define FAT_ENV_FILE			"uboot.env"
129 #define CONFIG_FAT_WRITE
130 #define CONFIG_ENV_VARS_UBOOT_CONFIG
131 #define CONFIG_SYS_LOAD_ADDR		0x1000000
132 #define CONFIG_PREBOOT			"usb start"
133 
134 /* Shell */
135 #define CONFIG_SYS_MAXARGS		16
136 #define CONFIG_COMMAND_HISTORY
137 
138 /* Commands */
139 #define CONFIG_PARTITION_UUIDS
140 #define CONFIG_CMD_PART
141 
142 /* ATAGs support for bootm/bootz */
143 #define CONFIG_SETUP_MEMORY_TAGS
144 #define CONFIG_CMDLINE_TAG
145 #define CONFIG_INITRD_TAG
146 
147 #include <config_distro_defaults.h>
148 
149 /* Environment */
150 #define CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
151 #define ENV_DEVICE_SETTINGS \
152 	"stdin=serial,usbkbd\0" \
153 	"stdout=serial,lcd\0" \
154 	"stderr=serial,lcd\0"
155 
156 /*
157  * Memory layout for where various images get loaded by boot scripts:
158  *
159  * I suspect address 0 is used as the SMP pen on the RPi2, so avoid this.
160  *
161  * fdt_addr_r simply shouldn't overlap anything else. However, the RPi's
162  *   binary firmware loads a DT to address 0x100, so we choose this address to
163  *   match it. This allows custom boot scripts to pass this DT on to Linux
164  *   simply by not over-writing the data at this address. When using U-Boot,
165  *   U-Boot (and scripts it executes) typicaly ignore the DT loaded by the FW
166  *   and loads its own DT from disk (triggered by boot.scr or extlinux.conf).
167  *
168  * pxefile_addr_r can be pretty much anywhere that doesn't conflict with
169  *   something else. Put it low in memory to avoid conflicts.
170  *
171  * kernel_addr_r must be within the first 128M of RAM in order for the
172  *   kernel's CONFIG_AUTO_ZRELADDR option to work. Since the kernel will
173  *   decompress itself to 0x8000 after the start of RAM, kernel_addr_r
174  *   should not overlap that area, or the kernel will have to copy itself
175  *   somewhere else before decompression. Similarly, the address of any other
176  *   data passed to the kernel shouldn't overlap the start of RAM. Pushing
177  *   this up to 16M allows for a sizable kernel to be decompressed below the
178  *   compressed load address.
179  *
180  * scriptaddr can be pretty much anywhere that doesn't conflict with something
181  *   else. Choosing 32M allows for the compressed kernel to be up to 16M.
182  *
183  * ramdisk_addr_r simply shouldn't overlap anything else. Choosing 33M allows
184  *   for any boot script to be up to 1M, which is hopefully plenty.
185  */
186 #define ENV_MEM_LAYOUT_SETTINGS \
187 	"fdt_high=ffffffff\0" \
188 	"initrd_high=ffffffff\0" \
189 	"fdt_addr_r=0x00000100\0" \
190 	"pxefile_addr_r=0x00100000\0" \
191 	"kernel_addr_r=0x01000000\0" \
192 	"scriptaddr=0x02000000\0" \
193 	"ramdisk_addr_r=0x02100000\0" \
194 
195 #define BOOT_TARGET_DEVICES(func) \
196 	func(MMC, mmc, 0) \
197 	func(USB, usb, 0) \
198 	func(PXE, pxe, na) \
199 	func(DHCP, dhcp, na)
200 #include <config_distro_bootcmd.h>
201 
202 #define CONFIG_EXTRA_ENV_SETTINGS \
203 	"dhcpuboot=usb start; dhcp u-boot.uimg; bootm\0" \
204 	ENV_DEVICE_SETTINGS \
205 	ENV_MEM_LAYOUT_SETTINGS \
206 	BOOTENV
207 
208 
209 #endif
210