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authorAlbert ARIBAUD <albert.u.boot@aribaud.net>2015-04-10 14:22:23 +0200
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2015-04-10 14:22:23 +0200
commitb491d9757d14415edcb1468ed896a704d0f0cfe7 (patch)
tree477707170048989accc9ea69cd6ac5edae7b1aec /arch/arm/mach-bcm283x
parent79d75d752717fb4106ec49abaddbd7744c775a35 (diff)
parent385a08a60f042061b004642d6b9bb6cfb794ad5a (diff)
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Merge branch 'u-boot/master'
Diffstat (limited to 'arch/arm/mach-bcm283x')
-rw-r--r--arch/arm/mach-bcm283x/Kconfig40
-rw-r--r--arch/arm/mach-bcm283x/Makefile8
-rw-r--r--arch/arm/mach-bcm283x/include/mach/gpio.h69
-rw-r--r--arch/arm/mach-bcm283x/include/mach/mbox.h527
-rw-r--r--arch/arm/mach-bcm283x/include/mach/sdhci.h18
-rw-r--r--arch/arm/mach-bcm283x/include/mach/timer.h33
-rw-r--r--arch/arm/mach-bcm283x/include/mach/wdog.h30
-rw-r--r--arch/arm/mach-bcm283x/init.c24
-rw-r--r--arch/arm/mach-bcm283x/lowlevel_init.S19
-rw-r--r--arch/arm/mach-bcm283x/mbox.c153
-rw-r--r--arch/arm/mach-bcm283x/reset.c35
-rw-r--r--arch/arm/mach-bcm283x/timer.c58
12 files changed, 1014 insertions, 0 deletions
diff --git a/arch/arm/mach-bcm283x/Kconfig b/arch/arm/mach-bcm283x/Kconfig
new file mode 100644
index 0000000..b43f2d9
--- /dev/null
+++ b/arch/arm/mach-bcm283x/Kconfig
@@ -0,0 +1,40 @@
+menu "Broadcom BCM283X family"
+ depends on ARCH_BCM283X
+
+choice
+ prompt "Broadcom BCM283X board select"
+
+config TARGET_RPI
+ bool "Raspberry Pi"
+ select CPU_ARM1176
+
+config TARGET_RPI_2
+ bool "Raspberry Pi 2"
+ select CPU_V7
+
+endchoice
+
+config DM
+ default y
+
+config DM_SERIAL
+ default y
+
+config DM_GPIO
+ default y
+
+config SYS_BOARD
+ default "rpi" if TARGET_RPI
+ default "rpi_2" if TARGET_RPI_2
+
+config SYS_VENDOR
+ default "raspberrypi"
+
+config SYS_SOC
+ default "bcm283x"
+
+config SYS_CONFIG_NAME
+ default "rpi" if TARGET_RPI
+ default "rpi_2" if TARGET_RPI_2
+
+endmenu
diff --git a/arch/arm/mach-bcm283x/Makefile b/arch/arm/mach-bcm283x/Makefile
new file mode 100644
index 0000000..2505428
--- /dev/null
+++ b/arch/arm/mach-bcm283x/Makefile
@@ -0,0 +1,8 @@
+#
+# (C) Copyright 2012 Stephen Warren
+#
+# SPDX-License-Identifier: GPL-2.0
+#
+
+obj-$(CONFIG_TARGET_RPI) += lowlevel_init.o
+obj-y += init.o reset.o timer.o mbox.o
diff --git a/arch/arm/mach-bcm283x/include/mach/gpio.h b/arch/arm/mach-bcm283x/include/mach/gpio.h
new file mode 100644
index 0000000..c8ef8f5
--- /dev/null
+++ b/arch/arm/mach-bcm283x/include/mach/gpio.h
@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2012 Vikram Narayananan
+ * <vikram186@gmail.com>
+ * (C) Copyright 2012,2015 Stephen Warren
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef _BCM2835_GPIO_H_
+#define _BCM2835_GPIO_H_
+
+#ifdef CONFIG_BCM2836
+#define BCM2835_GPIO_BASE 0x3f200000
+#else
+#define BCM2835_GPIO_BASE 0x20200000
+#endif
+#define BCM2835_GPIO_COUNT 54
+
+#define BCM2835_GPIO_FSEL_MASK 0x7
+#define BCM2835_GPIO_INPUT 0x0
+#define BCM2835_GPIO_OUTPUT 0x1
+#define BCM2835_GPIO_ALT0 0x4
+#define BCM2835_GPIO_ALT1 0x5
+#define BCM2835_GPIO_ALT2 0x6
+#define BCM2835_GPIO_ALT3 0x7
+#define BCM2835_GPIO_ALT4 0x3
+#define BCM2835_GPIO_ALT5 0x2
+
+#define BCM2835_GPIO_COMMON_BANK(gpio) ((gpio < 32) ? 0 : 1)
+#define BCM2835_GPIO_COMMON_SHIFT(gpio) (gpio & 0x1f)
+
+#define BCM2835_GPIO_FSEL_BANK(gpio) (gpio / 10)
+#define BCM2835_GPIO_FSEL_SHIFT(gpio) ((gpio % 10) * 3)
+
+struct bcm2835_gpio_regs {
+ u32 gpfsel[6];
+ u32 reserved1;
+ u32 gpset[2];
+ u32 reserved2;
+ u32 gpclr[2];
+ u32 reserved3;
+ u32 gplev[2];
+ u32 reserved4;
+ u32 gpeds[2];
+ u32 reserved5;
+ u32 gpren[2];
+ u32 reserved6;
+ u32 gpfen[2];
+ u32 reserved7;
+ u32 gphen[2];
+ u32 reserved8;
+ u32 gplen[2];
+ u32 reserved9;
+ u32 gparen[2];
+ u32 reserved10;
+ u32 gppud;
+ u32 gppudclk[2];
+};
+
+/**
+ * struct bcm2835_gpio_platdata - GPIO platform description
+ *
+ * @base: Base address of GPIO controller
+ */
+struct bcm2835_gpio_platdata {
+ unsigned long base;
+};
+
+#endif /* _BCM2835_GPIO_H_ */
diff --git a/arch/arm/mach-bcm283x/include/mach/mbox.h b/arch/arm/mach-bcm283x/include/mach/mbox.h
new file mode 100644
index 0000000..04bf480
--- /dev/null
+++ b/arch/arm/mach-bcm283x/include/mach/mbox.h
@@ -0,0 +1,527 @@
+/*
+ * (C) Copyright 2012,2015 Stephen Warren
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef _BCM2835_MBOX_H
+#define _BCM2835_MBOX_H
+
+#include <linux/compiler.h>
+
+/*
+ * The BCM2835 SoC contains (at least) two CPUs; the VideoCore (a/k/a "GPU")
+ * and the ARM CPU. The ARM CPU is often thought of as the main CPU.
+ * However, the VideoCore actually controls the initial SoC boot, and hides
+ * much of the hardware behind a protocol. This protocol is transported
+ * using the SoC's mailbox hardware module.
+ *
+ * The mailbox hardware supports passing 32-bit values back and forth.
+ * Presumably by software convention of the firmware, the bottom 4 bits of the
+ * value are used to indicate a logical channel, and the upper 28 bits are the
+ * actual payload. Various channels exist using these simple raw messages. See
+ * https://github.com/raspberrypi/firmware/wiki/Mailboxes for a list. As an
+ * example, the messages on the power management channel are a bitmask of
+ * devices whose power should be enabled.
+ *
+ * The property mailbox channel passes messages that contain the (16-byte
+ * aligned) ARM physical address of a memory buffer. This buffer is passed to
+ * the VC for processing, is modified in-place by the VC, and the address then
+ * passed back to the ARM CPU as the response mailbox message to indicate
+ * request completion. The buffers have a generic and extensible format; each
+ * buffer contains a standard header, a list of "tags", and a terminating zero
+ * entry. Each tag contains an ID indicating its type, and length fields for
+ * generic parsing. With some limitations, an arbitrary set of tags may be
+ * combined together into a single message buffer. This file defines structs
+ * representing the header and many individual tag layouts and IDs.
+ */
+
+/* Raw mailbox HW */
+
+#ifdef CONFIG_BCM2836
+#define BCM2835_MBOX_PHYSADDR 0x3f00b880
+#else
+#define BCM2835_MBOX_PHYSADDR 0x2000b880
+#endif
+
+struct bcm2835_mbox_regs {
+ u32 read;
+ u32 rsvd0[5];
+ u32 status;
+ u32 config;
+ u32 write;
+};
+
+#define BCM2835_MBOX_STATUS_WR_FULL 0x80000000
+#define BCM2835_MBOX_STATUS_RD_EMPTY 0x40000000
+
+/* Lower 4-bits are channel ID */
+#define BCM2835_CHAN_MASK 0xf
+#define BCM2835_MBOX_PACK(chan, data) (((data) & (~BCM2835_CHAN_MASK)) | \
+ (chan & BCM2835_CHAN_MASK))
+#define BCM2835_MBOX_UNPACK_CHAN(val) ((val) & BCM2835_CHAN_MASK)
+#define BCM2835_MBOX_UNPACK_DATA(val) ((val) & (~BCM2835_CHAN_MASK))
+
+/* Property mailbox buffer structures */
+
+#define BCM2835_MBOX_PROP_CHAN 8
+
+/* All message buffers must start with this header */
+struct bcm2835_mbox_hdr {
+ u32 buf_size;
+ u32 code;
+};
+
+#define BCM2835_MBOX_REQ_CODE 0
+#define BCM2835_MBOX_RESP_CODE_SUCCESS 0x80000000
+
+#define BCM2835_MBOX_INIT_HDR(_m_) { \
+ memset((_m_), 0, sizeof(*(_m_))); \
+ (_m_)->hdr.buf_size = sizeof(*(_m_)); \
+ (_m_)->hdr.code = 0; \
+ (_m_)->end_tag = 0; \
+ }
+
+/*
+ * A message buffer contains a list of tags. Each tag must also start with
+ * a standardized header.
+ */
+struct bcm2835_mbox_tag_hdr {
+ u32 tag;
+ u32 val_buf_size;
+ u32 val_len;
+};
+
+#define BCM2835_MBOX_INIT_TAG(_t_, _id_) { \
+ (_t_)->tag_hdr.tag = BCM2835_MBOX_TAG_##_id_; \
+ (_t_)->tag_hdr.val_buf_size = sizeof((_t_)->body); \
+ (_t_)->tag_hdr.val_len = sizeof((_t_)->body.req); \
+ }
+
+#define BCM2835_MBOX_INIT_TAG_NO_REQ(_t_, _id_) { \
+ (_t_)->tag_hdr.tag = BCM2835_MBOX_TAG_##_id_; \
+ (_t_)->tag_hdr.val_buf_size = sizeof((_t_)->body); \
+ (_t_)->tag_hdr.val_len = 0; \
+ }
+
+/* When responding, the VC sets this bit in val_len to indicate a response */
+#define BCM2835_MBOX_TAG_VAL_LEN_RESPONSE 0x80000000
+
+/*
+ * Below we define the ID and struct for many possible tags. This header only
+ * defines individual tag structs, not entire message structs, since in
+ * general an arbitrary set of tags may be combined into a single message.
+ * Clients of the mbox API are expected to define their own overall message
+ * structures by combining the header, a set of tags, and a terminating
+ * entry. For example,
+ *
+ * struct msg {
+ * struct bcm2835_mbox_hdr hdr;
+ * struct bcm2835_mbox_tag_get_arm_mem get_arm_mem;
+ * ... perhaps other tags here ...
+ * u32 end_tag;
+ * };
+ */
+
+#define BCM2835_MBOX_TAG_GET_BOARD_REV 0x00010002
+
+#ifdef CONFIG_BCM2836
+#define BCM2836_BOARD_REV_2_B 0x4
+#else
+/*
+ * 0x2..0xf from:
+ * http://raspberryalphaomega.org.uk/2013/02/06/automatic-raspberry-pi-board-revision-detection-model-a-b1-and-b2/
+ * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=32733
+ * 0x10, 0x11 from swarren's testing
+ */
+#define BCM2835_BOARD_REV_B_I2C0_2 0x2
+#define BCM2835_BOARD_REV_B_I2C0_3 0x3
+#define BCM2835_BOARD_REV_B_I2C1_4 0x4
+#define BCM2835_BOARD_REV_B_I2C1_5 0x5
+#define BCM2835_BOARD_REV_B_I2C1_6 0x6
+#define BCM2835_BOARD_REV_A_7 0x7
+#define BCM2835_BOARD_REV_A_8 0x8
+#define BCM2835_BOARD_REV_A_9 0x9
+#define BCM2835_BOARD_REV_B_REV2_d 0xd
+#define BCM2835_BOARD_REV_B_REV2_e 0xe
+#define BCM2835_BOARD_REV_B_REV2_f 0xf
+#define BCM2835_BOARD_REV_B_PLUS 0x10
+#define BCM2835_BOARD_REV_CM 0x11
+#define BCM2835_BOARD_REV_A_PLUS 0x12
+#endif
+
+struct bcm2835_mbox_tag_get_board_rev {
+ struct bcm2835_mbox_tag_hdr tag_hdr;
+ union {
+ struct {
+ } req;
+ struct {
+ u32 rev;
+ } resp;
+ } body;
+};
+
+#define BCM2835_MBOX_TAG_GET_MAC_ADDRESS 0x00010003
+
+struct bcm2835_mbox_tag_get_mac_address {
+ struct bcm2835_mbox_tag_hdr tag_hdr;
+ union {
+ struct {
+ } req;
+ struct {
+ u8 mac[6];
+ u8 pad[2];
+ } resp;
+ } body;
+};
+
+#define BCM2835_MBOX_TAG_GET_ARM_MEMORY 0x00010005
+
+struct bcm2835_mbox_tag_get_arm_mem {
+ struct bcm2835_mbox_tag_hdr tag_hdr;
+ union {
+ struct {
+ } req;
+ struct {
+ u32 mem_base;
+ u32 mem_size;
+ } resp;
+ } body;
+};
+
+#define BCM2835_MBOX_POWER_DEVID_SDHCI 0
+#define BCM2835_MBOX_POWER_DEVID_UART0 1
+#define BCM2835_MBOX_POWER_DEVID_UART1 2
+#define BCM2835_MBOX_POWER_DEVID_USB_HCD 3
+#define BCM2835_MBOX_POWER_DEVID_I2C0 4
+#define BCM2835_MBOX_POWER_DEVID_I2C1 5
+#define BCM2835_MBOX_POWER_DEVID_I2C2 6
+#define BCM2835_MBOX_POWER_DEVID_SPI 7
+#define BCM2835_MBOX_POWER_DEVID_CCP2TX 8
+
+#define BCM2835_MBOX_POWER_STATE_RESP_ON (1 << 0)
+/* Device doesn't exist */
+#define BCM2835_MBOX_POWER_STATE_RESP_NODEV (1 << 1)
+
+#define BCM2835_MBOX_TAG_GET_POWER_STATE 0x00020001
+
+struct bcm2835_mbox_tag_get_power_state {
+ struct bcm2835_mbox_tag_hdr tag_hdr;
+ union {
+ struct {
+ u32 device_id;
+ } req;
+ struct {
+ u32 device_id;
+ u32 state;
+ } resp;
+ } body;
+};
+
+#define BCM2835_MBOX_TAG_SET_POWER_STATE 0x00028001
+
+#define BCM2835_MBOX_SET_POWER_STATE_REQ_ON (1 << 0)
+#define BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT (1 << 1)
+
+struct bcm2835_mbox_tag_set_power_state {
+ struct bcm2835_mbox_tag_hdr tag_hdr;
+ union {
+ struct {
+ u32 device_id;
+ u32 state;
+ } req;
+ struct {
+ u32 device_id;
+ u32 state;
+ } resp;
+ } body;
+};
+
+#define BCM2835_MBOX_TAG_GET_CLOCK_RATE 0x00030002
+
+#define BCM2835_MBOX_CLOCK_ID_EMMC 1
+#define BCM2835_MBOX_CLOCK_ID_UART 2
+#define BCM2835_MBOX_CLOCK_ID_ARM 3
+#define BCM2835_MBOX_CLOCK_ID_CORE 4
+#define BCM2835_MBOX_CLOCK_ID_V3D 5
+#define BCM2835_MBOX_CLOCK_ID_H264 6
+#define BCM2835_MBOX_CLOCK_ID_ISP 7
+#define BCM2835_MBOX_CLOCK_ID_SDRAM 8
+#define BCM2835_MBOX_CLOCK_ID_PIXEL 9
+#define BCM2835_MBOX_CLOCK_ID_PWM 10
+
+struct bcm2835_mbox_tag_get_clock_rate {
+ struct bcm2835_mbox_tag_hdr tag_hdr;
+ union {
+ struct {
+ u32 clock_id;
+ } req;
+ struct {
+ u32 clock_id;
+ u32 rate_hz;
+ } resp;
+ } body;
+};
+
+#define BCM2835_MBOX_TAG_ALLOCATE_BUFFER 0x00040001
+
+struct bcm2835_mbox_tag_allocate_buffer {
+ struct bcm2835_mbox_tag_hdr tag_hdr;
+ union {
+ struct {
+ u32 alignment;
+ } req;
+ struct {
+ u32 fb_address;
+ u32 fb_size;
+ } resp;
+ } body;
+};
+
+#define BCM2835_MBOX_TAG_RELEASE_BUFFER 0x00048001
+
+struct bcm2835_mbox_tag_release_buffer {
+ struct bcm2835_mbox_tag_hdr tag_hdr;
+ union {
+ struct {
+ } req;
+ struct {
+ } resp;
+ } body;
+};
+
+#define BCM2835_MBOX_TAG_BLANK_SCREEN 0x00040002
+
+struct bcm2835_mbox_tag_blank_screen {
+ struct bcm2835_mbox_tag_hdr tag_hdr;
+ union {
+ struct {
+ /* bit 0 means on, other bots reserved */
+ u32 state;
+ } req;
+ struct {
+ u32 state;
+ } resp;
+ } body;
+};
+
+/* Physical means output signal */
+#define BCM2835_MBOX_TAG_GET_PHYSICAL_W_H 0x00040003
+#define BCM2835_MBOX_TAG_TEST_PHYSICAL_W_H 0x00044003
+#define BCM2835_MBOX_TAG_SET_PHYSICAL_W_H 0x00048003
+
+struct bcm2835_mbox_tag_physical_w_h {
+ struct bcm2835_mbox_tag_hdr tag_hdr;
+ union {
+ /* req not used for get */
+ struct {
+ u32 width;
+ u32 height;
+ } req;
+ struct {
+ u32 width;
+ u32 height;
+ } resp;
+ } body;
+};
+
+/* Virtual means display buffer */
+#define BCM2835_MBOX_TAG_GET_VIRTUAL_W_H 0x00040004
+#define BCM2835_MBOX_TAG_TEST_VIRTUAL_W_H 0x00044004
+#define BCM2835_MBOX_TAG_SET_VIRTUAL_W_H 0x00048004
+
+struct bcm2835_mbox_tag_virtual_w_h {
+ struct bcm2835_mbox_tag_hdr tag_hdr;
+ union {
+ /* req not used for get */
+ struct {
+ u32 width;
+ u32 height;
+ } req;
+ struct {
+ u32 width;
+ u32 height;
+ } resp;
+ } body;
+};
+
+#define BCM2835_MBOX_TAG_GET_DEPTH 0x00040005
+#define BCM2835_MBOX_TAG_TEST_DEPTH 0x00044005
+#define BCM2835_MBOX_TAG_SET_DEPTH 0x00048005
+
+struct bcm2835_mbox_tag_depth {
+ struct bcm2835_mbox_tag_hdr tag_hdr;
+ union {
+ /* req not used for get */
+ struct {
+ u32 bpp;
+ } req;
+ struct {
+ u32 bpp;
+ } resp;
+ } body;
+};
+
+#define BCM2835_MBOX_TAG_GET_PIXEL_ORDER 0x00040006
+#define BCM2835_MBOX_TAG_TEST_PIXEL_ORDER 0x00044005
+#define BCM2835_MBOX_TAG_SET_PIXEL_ORDER 0x00048006
+
+#define BCM2835_MBOX_PIXEL_ORDER_BGR 0
+#define BCM2835_MBOX_PIXEL_ORDER_RGB 1
+
+struct bcm2835_mbox_tag_pixel_order {
+ struct bcm2835_mbox_tag_hdr tag_hdr;
+ union {
+ /* req not used for get */
+ struct {
+ u32 order;
+ } req;
+ struct {
+ u32 order;
+ } resp;
+ } body;
+};
+
+#define BCM2835_MBOX_TAG_GET_ALPHA_MODE 0x00040007
+#define BCM2835_MBOX_TAG_TEST_ALPHA_MODE 0x00044007
+#define BCM2835_MBOX_TAG_SET_ALPHA_MODE 0x00048007
+
+#define BCM2835_MBOX_ALPHA_MODE_0_OPAQUE 0
+#define BCM2835_MBOX_ALPHA_MODE_0_TRANSPARENT 1
+#define BCM2835_MBOX_ALPHA_MODE_IGNORED 2
+
+struct bcm2835_mbox_tag_alpha_mode {
+ struct bcm2835_mbox_tag_hdr tag_hdr;
+ union {
+ /* req not used for get */
+ struct {
+ u32 alpha;
+ } req;
+ struct {
+ u32 alpha;
+ } resp;
+ } body;
+};
+
+#define BCM2835_MBOX_TAG_GET_PITCH 0x00040008
+
+struct bcm2835_mbox_tag_pitch {
+ struct bcm2835_mbox_tag_hdr tag_hdr;
+ union {
+ struct {
+ } req;
+ struct {
+ u32 pitch;
+ } resp;
+ } body;
+};
+
+/* Offset of display window within buffer */
+#define BCM2835_MBOX_TAG_GET_VIRTUAL_OFFSET 0x00040009
+#define BCM2835_MBOX_TAG_TEST_VIRTUAL_OFFSET 0x00044009
+#define BCM2835_MBOX_TAG_SET_VIRTUAL_OFFSET 0x00048009
+
+struct bcm2835_mbox_tag_virtual_offset {
+ struct bcm2835_mbox_tag_hdr tag_hdr;
+ union {
+ /* req not used for get */
+ struct {
+ u32 x;
+ u32 y;
+ } req;
+ struct {
+ u32 x;
+ u32 y;
+ } resp;
+ } body;
+};
+
+#define BCM2835_MBOX_TAG_GET_OVERSCAN 0x0004000a
+#define BCM2835_MBOX_TAG_TEST_OVERSCAN 0x0004400a
+#define BCM2835_MBOX_TAG_SET_OVERSCAN 0x0004800a
+
+struct bcm2835_mbox_tag_overscan {
+ struct bcm2835_mbox_tag_hdr tag_hdr;
+ union {
+ /* req not used for get */
+ struct {
+ u32 top;
+ u32 bottom;
+ u32 left;
+ u32 right;
+ } req;
+ struct {
+ u32 top;
+ u32 bottom;
+ u32 left;
+ u32 right;
+ } resp;
+ } body;
+};
+
+#define BCM2835_MBOX_TAG_GET_PALETTE 0x0004000b
+
+struct bcm2835_mbox_tag_get_palette {
+ struct bcm2835_mbox_tag_hdr tag_hdr;
+ union {
+ struct {
+ } req;
+ struct {
+ u32 data[1024];
+ } resp;
+ } body;
+};
+
+#define BCM2835_MBOX_TAG_TEST_PALETTE 0x0004400b
+
+struct bcm2835_mbox_tag_test_palette {
+ struct bcm2835_mbox_tag_hdr tag_hdr;
+ union {
+ struct {
+ u32 offset;
+ u32 num_entries;
+ u32 data[256];
+ } req;
+ struct {
+ u32 is_invalid;
+ } resp;
+ } body;
+};
+
+#define BCM2835_MBOX_TAG_SET_PALETTE 0x0004800b
+
+struct bcm2835_mbox_tag_set_palette {
+ struct bcm2835_mbox_tag_hdr tag_hdr;
+ union {
+ struct {
+ u32 offset;
+ u32 num_entries;
+ u32 data[256];
+ } req;
+ struct {
+ u32 is_invalid;
+ } resp;
+ } body;
+};
+
+/*
+ * Pass a raw u32 message to the VC, and receive a raw u32 back.
+ *
+ * Returns 0 for success, any other value for error.
+ */
+int bcm2835_mbox_call_raw(u32 chan, u32 send, u32 *recv);
+
+/*
+ * Pass a complete property-style buffer to the VC, and wait until it has
+ * been processed.
+ *
+ * This function expects a pointer to the mbox_hdr structure in an attempt
+ * to ensure some degree of type safety. However, some number of tags and
+ * a termination value are expected to immediately follow the header in
+ * memory, as required by the property protocol.
+ *
+ * Returns 0 for success, any other value for error.
+ */
+int bcm2835_mbox_call_prop(u32 chan, struct bcm2835_mbox_hdr *buffer);
+
+#endif
diff --git a/arch/arm/mach-bcm283x/include/mach/sdhci.h b/arch/arm/mach-bcm283x/include/mach/sdhci.h
new file mode 100644
index 0000000..2a21ccb
--- /dev/null
+++ b/arch/arm/mach-bcm283x/include/mach/sdhci.h
@@ -0,0 +1,18 @@
+/*
+ * (C) Copyright 2012,2015 Stephen Warren
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#ifndef _BCM2835_SDHCI_H_
+#define _BCM2835_SDHCI_H_
+
+#ifdef CONFIG_BCM2836
+#define BCM2835_SDHCI_BASE 0x3f300000
+#else
+#define BCM2835_SDHCI_BASE 0x20300000
+#endif
+
+int bcm2835_sdhci_init(u32 regbase, u32 emmc_freq);
+
+#endif
diff --git a/arch/arm/mach-bcm283x/include/mach/timer.h b/arch/arm/mach-bcm283x/include/mach/timer.h
new file mode 100644
index 0000000..fc7aec7
--- /dev/null
+++ b/arch/arm/mach-bcm283x/include/mach/timer.h
@@ -0,0 +1,33 @@
+/*
+ * (C) Copyright 2012,2015 Stephen Warren
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#ifndef _BCM2835_TIMER_H
+#define _BCM2835_TIMER_H
+
+#ifdef CONFIG_BCM2836
+#define BCM2835_TIMER_PHYSADDR 0x3f003000
+#else
+#define BCM2835_TIMER_PHYSADDR 0x20003000
+#endif
+
+struct bcm2835_timer_regs {
+ u32 cs;
+ u32 clo;
+ u32 chi;
+ u32 c0;
+ u32 c1;
+ u32 c2;
+ u32 c3;
+};
+
+#define BCM2835_TIMER_CS_M3 (1 << 3)
+#define BCM2835_TIMER_CS_M2 (1 << 2)
+#define BCM2835_TIMER_CS_M1 (1 << 1)
+#define BCM2835_TIMER_CS_M0 (1 << 0)
+
+extern ulong get_timer_us(ulong base);
+
+#endif
diff --git a/arch/arm/mach-bcm283x/include/mach/wdog.h b/arch/arm/mach-bcm283x/include/mach/wdog.h
new file mode 100644
index 0000000..beb6a08
--- /dev/null
+++ b/arch/arm/mach-bcm283x/include/mach/wdog.h
@@ -0,0 +1,30 @@
+/*
+ * (C) Copyright 2012,2015 Stephen Warren
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#ifndef _BCM2835_TIMER_H
+#define _BCM2835_TIMER_H
+
+#ifdef CONFIG_BCM2836
+#define BCM2835_WDOG_PHYSADDR 0x3f100000
+#else
+#define BCM2835_WDOG_PHYSADDR 0x20100000
+#endif
+
+struct bcm2835_wdog_regs {
+ u32 unknown0[7];
+ u32 rstc;
+ u32 unknown1;
+ u32 wdog;
+};
+
+#define BCM2835_WDOG_PASSWORD 0x5a000000
+
+#define BCM2835_WDOG_RSTC_WRCFG_MASK 0x00000030
+#define BCM2835_WDOG_RSTC_WRCFG_FULL_RESET 0x00000020
+
+#define BCM2835_WDOG_WDOG_TIMEOUT_MASK 0x0000ffff
+
+#endif
diff --git a/arch/arm/mach-bcm283x/init.c b/arch/arm/mach-bcm283x/init.c
new file mode 100644
index 0000000..e90d3bb
--- /dev/null
+++ b/arch/arm/mach-bcm283x/init.c
@@ -0,0 +1,24 @@
+/*
+ * (C) Copyright 2012 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>
+
+int arch_cpu_init(void)
+{
+ icache_enable();
+
+ return 0;
+}
diff --git a/arch/arm/mach-bcm283x/lowlevel_init.S b/arch/arm/mach-bcm283x/lowlevel_init.S
new file mode 100644
index 0000000..c7b0843
--- /dev/null
+++ b/arch/arm/mach-bcm283x/lowlevel_init.S
@@ -0,0 +1,19 @@
+/*
+ * (C) Copyright 2012 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.
+ */
+
+.globl lowlevel_init
+lowlevel_init:
+ mov pc, lr
diff --git a/arch/arm/mach-bcm283x/mbox.c b/arch/arm/mach-bcm283x/mbox.c
new file mode 100644
index 0000000..3b17a31
--- /dev/null
+++ b/arch/arm/mach-bcm283x/mbox.c
@@ -0,0 +1,153 @@
+/*
+ * (C) Copyright 2012 Stephen Warren
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/mbox.h>
+
+#define TIMEOUT 1000 /* ms */
+
+int bcm2835_mbox_call_raw(u32 chan, u32 send, u32 *recv)
+{
+ struct bcm2835_mbox_regs *regs =
+ (struct bcm2835_mbox_regs *)BCM2835_MBOX_PHYSADDR;
+ ulong endtime = get_timer(0) + TIMEOUT;
+ u32 val;
+
+ debug("time: %lu timeout: %lu\n", get_timer(0), endtime);
+
+ if (send & BCM2835_CHAN_MASK) {
+ printf("mbox: Illegal mbox data 0x%08x\n", send);
+ return -1;
+ }
+
+ /* Drain any stale responses */
+
+ for (;;) {
+ val = readl(&regs->status);
+ if (val & BCM2835_MBOX_STATUS_RD_EMPTY)
+ break;
+ if (get_timer(0) >= endtime) {
+ printf("mbox: Timeout draining stale responses\n");
+ return -1;
+ }
+ val = readl(&regs->read);
+ }
+
+ /* Wait for space to send */
+
+ for (;;) {
+ val = readl(&regs->status);
+ if (!(val & BCM2835_MBOX_STATUS_WR_FULL))
+ break;
+ if (get_timer(0) >= endtime) {
+ printf("mbox: Timeout waiting for send space\n");
+ return -1;
+ }
+ }
+
+ /* Send the request */
+
+ val = BCM2835_MBOX_PACK(chan, send);
+ debug("mbox: TX raw: 0x%08x\n", val);
+ writel(val, &regs->write);
+
+ /* Wait for the response */
+
+ for (;;) {
+ val = readl(&regs->status);
+ if (!(val & BCM2835_MBOX_STATUS_RD_EMPTY))
+ break;
+ if (get_timer(0) >= endtime) {
+ printf("mbox: Timeout waiting for response\n");
+ return -1;
+ }
+ }
+
+ /* Read the response */
+
+ val = readl(&regs->read);
+ debug("mbox: RX raw: 0x%08x\n", val);
+
+ /* Validate the response */
+
+ if (BCM2835_MBOX_UNPACK_CHAN(val) != chan) {
+ printf("mbox: Response channel mismatch\n");
+ return -1;
+ }
+
+ *recv = BCM2835_MBOX_UNPACK_DATA(val);
+
+ return 0;
+}
+
+#ifdef DEBUG
+void dump_buf(struct bcm2835_mbox_hdr *buffer)
+{
+ u32 *p;
+ u32 words;
+ int i;
+
+ p = (u32 *)buffer;
+ words = buffer->buf_size / 4;
+ for (i = 0; i < words; i++)
+ printf(" 0x%04x: 0x%08x\n", i * 4, p[i]);
+}
+#endif
+
+int bcm2835_mbox_call_prop(u32 chan, struct bcm2835_mbox_hdr *buffer)
+{
+ int ret;
+ u32 rbuffer;
+ struct bcm2835_mbox_tag_hdr *tag;
+ int tag_index;
+
+#ifdef DEBUG
+ printf("mbox: TX buffer\n");
+ dump_buf(buffer);
+#endif
+
+ ret = bcm2835_mbox_call_raw(chan, (u32)buffer, &rbuffer);
+ if (ret)
+ return ret;
+ if (rbuffer != (u32)buffer) {
+ printf("mbox: Response buffer mismatch\n");
+ return -1;
+ }
+
+#ifdef DEBUG
+ printf("mbox: RX buffer\n");
+ dump_buf(buffer);
+#endif
+
+ /* Validate overall response status */
+
+ if (buffer->code != BCM2835_MBOX_RESP_CODE_SUCCESS) {
+ printf("mbox: Header response code invalid\n");
+ return -1;
+ }
+
+ /* Validate each tag's response status */
+
+ tag = (void *)(buffer + 1);
+ tag_index = 0;
+ while (tag->tag) {
+ if (!(tag->val_len & BCM2835_MBOX_TAG_VAL_LEN_RESPONSE)) {
+ printf("mbox: Tag %d missing val_len response bit\n",
+ tag_index);
+ return -1;
+ }
+ /*
+ * Clear the reponse bit so clients can just look right at the
+ * length field without extra processing
+ */
+ tag->val_len &= ~BCM2835_MBOX_TAG_VAL_LEN_RESPONSE;
+ tag = (void *)(((u8 *)tag) + sizeof(*tag) + tag->val_buf_size);
+ tag_index++;
+ }
+
+ return 0;
+}
diff --git a/arch/arm/mach-bcm283x/reset.c b/arch/arm/mach-bcm283x/reset.c
new file mode 100644
index 0000000..8c37ad9
--- /dev/null
+++ b/arch/arm/mach-bcm283x/reset.c
@@ -0,0 +1,35 @@
+/*
+ * (C) Copyright 2012 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 <asm/io.h>
+#include <asm/arch/wdog.h>
+
+#define RESET_TIMEOUT 10
+
+void reset_cpu(ulong addr)
+{
+ struct bcm2835_wdog_regs *regs =
+ (struct bcm2835_wdog_regs *)BCM2835_WDOG_PHYSADDR;
+ uint32_t rstc;
+
+ rstc = readl(&regs->rstc);
+ rstc &= ~BCM2835_WDOG_RSTC_WRCFG_MASK;
+ rstc |= BCM2835_WDOG_RSTC_WRCFG_FULL_RESET;
+
+ writel(BCM2835_WDOG_PASSWORD | RESET_TIMEOUT, &regs->wdog);
+ writel(BCM2835_WDOG_PASSWORD | rstc, &regs->rstc);
+}
diff --git a/arch/arm/mach-bcm283x/timer.c b/arch/arm/mach-bcm283x/timer.c
new file mode 100644
index 0000000..017907c
--- /dev/null
+++ b/arch/arm/mach-bcm283x/timer.c
@@ -0,0 +1,58 @@
+/*
+ * (C) Copyright 2012 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 <asm/io.h>
+#include <asm/arch/timer.h>
+
+ulong get_timer_us(ulong base)
+{
+ struct bcm2835_timer_regs *regs =
+ (struct bcm2835_timer_regs *)BCM2835_TIMER_PHYSADDR;
+
+ return readl(&regs->clo) - base;
+}
+
+ulong get_timer(ulong base)
+{
+ ulong us = get_timer_us(0);
+ us /= (1000000 / CONFIG_SYS_HZ);
+ us -= base;
+ return us;
+}
+
+unsigned long long get_ticks(void)
+{
+ return get_timer(0);
+}
+
+ulong get_tbclk(void)
+{
+ return CONFIG_SYS_HZ;
+}
+
+void __udelay(unsigned long usec)
+{
+ ulong endtime;
+ signed long diff;
+
+ endtime = get_timer_us(0) + usec;
+
+ do {
+ ulong now = get_timer_us(0);
+ diff = endtime - now;
+ } while (diff >= 0);
+}