brcm2708: add linux 4.1 support

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

SVN-Revision: 46399

1 files changed, 426 insertions, 0 deletions

diff --git a/target/linux/brcm2708/patches-4.1/0077-ARM-bcm2835-Add-the-Raspberry-Pi-firmware-driver.patch b/target/linux/brcm2708/patches-4.1/0077-ARM-bcm2835-Add-the-Raspberry-Pi-firmware-driver.patch
new file mode 100644
index 0000000000..f739cbc78f
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.1/0077-ARM-bcm2835-Add-the-Raspberry-Pi-firmware-driver.patch
@@ -0,0 +1,426 @@
+From 48297e4045a1d8a3b2a0edbe6cf371a34c5eb3be Mon Sep 17 00:00:00 2001
+From: Eric Anholt <eric@anholt.net>
+Date: Thu, 4 Jun 2015 13:11:46 -0700
+Subject: [PATCH 077/121] ARM: bcm2835: Add the Raspberry Pi firmware driver
+
+This gives us a function for making mailbox property channel requests
+of the firmware, which is most notable in that it will let us get and
+set clock rates.
+
+Signed-off-by: Eric Anholt <eric@anholt.net>
+---
+ drivers/firmware/Kconfig                   |   7 +
+ drivers/firmware/Makefile                  |   1 +
+ drivers/firmware/raspberrypi.c             | 260 +++++++++++++++++++++++++++++
+ include/soc/bcm2835/raspberrypi-firmware.h | 115 +++++++++++++
+ 4 files changed, 383 insertions(+)
+ create mode 100644 drivers/firmware/raspberrypi.c
+ create mode 100644 include/soc/bcm2835/raspberrypi-firmware.h
+
+--- a/drivers/firmware/Kconfig
++++ b/drivers/firmware/Kconfig
+@@ -136,6 +136,13 @@ config QCOM_SCM
+ 	bool
+ 	depends on ARM || ARM64
+ 
++config RASPBERRYPI_FIRMWARE
++	tristate "Raspberry Pi Firmware Driver"
++	depends on BCM2835_MBOX
++	help
++	  This option enables support for communicating with the firmware on the
++	  Raspberry Pi.
++
+ source "drivers/firmware/google/Kconfig"
+ source "drivers/firmware/efi/Kconfig"
+ 
+--- a/drivers/firmware/Makefile
++++ b/drivers/firmware/Makefile
+@@ -13,6 +13,7 @@ obj-$(CONFIG_ISCSI_IBFT)	+= iscsi_ibft.o
+ obj-$(CONFIG_FIRMWARE_MEMMAP)	+= memmap.o
+ obj-$(CONFIG_QCOM_SCM)		+= qcom_scm.o
+ CFLAGS_qcom_scm.o :=$(call as-instr,.arch_extension sec,-DREQUIRES_SEC=1)
++obj-$(CONFIG_RASPBERRYPI_FIRMWARE) += raspberrypi.o
+ 
+ obj-$(CONFIG_GOOGLE_FIRMWARE)	+= google/
+ obj-$(CONFIG_EFI)		+= efi/
+--- /dev/null
++++ b/drivers/firmware/raspberrypi.c
+@@ -0,0 +1,260 @@
++/*
++ * Defines interfaces for interacting wtih the Raspberry Pi firmware's
++ * property channel.
++ *
++ * Copyright © 2015 Broadcom
++ *
++ * 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.
++ */
++
++#include <linux/dma-mapping.h>
++#include <linux/mailbox_client.h>
++#include <linux/module.h>
++#include <linux/of_platform.h>
++#include <linux/platform_device.h>
++#include <soc/bcm2835/raspberrypi-firmware.h>
++
++#define MBOX_MSG(chan, data28)		(((data28) & ~0xf) | ((chan) & 0xf))
++#define MBOX_CHAN(msg)			((msg) & 0xf)
++#define MBOX_DATA28(msg)		((msg) & ~0xf)
++#define MBOX_CHAN_PROPERTY		8
++
++struct rpi_firmware {
++	struct mbox_client cl;
++	struct mbox_chan *chan; /* The property channel. */
++	struct completion c;
++	u32 enabled;
++};
++
++static DEFINE_MUTEX(transaction_lock);
++
++static void response_callback(struct mbox_client *cl, void *msg)
++{
++	struct rpi_firmware *fw = container_of(cl, struct rpi_firmware, cl);
++	complete(&fw->c);
++}
++
++/*
++ * Sends a request to the firmware through the BCM2835 mailbox driver,
++ * and synchronously waits for the reply.
++ */
++static int
++rpi_firmware_transaction(struct rpi_firmware *fw, u32 chan, u32 data)
++{
++	u32 message = MBOX_MSG(chan, data);
++	int ret;
++
++	WARN_ON(data & 0xf);
++
++	mutex_lock(&transaction_lock);
++	reinit_completion(&fw->c);
++	ret = mbox_send_message(fw->chan, &message);
++	if (ret >= 0) {
++		wait_for_completion(&fw->c);
++		ret = 0;
++	} else {
++		dev_err(fw->cl.dev, "mbox_send_message returned %d\n", ret);
++	}
++	mutex_unlock(&transaction_lock);
++
++	return ret;
++}
++
++/**
++ * rpi_firmware_property_list - Submit firmware property list
++ * @fw:		Pointer to firmware structure from rpi_firmware_get().
++ * @data:	Buffer holding tags.
++ * @tag_size:	Size of tags buffer.
++ *
++ * Submits a set of concatenated tags to the VPU firmware through the
++ * mailbox property interface.
++ *
++ * The buffer header and the ending tag are added by this function and
++ * don't need to be supplied, just the actual tags for your operation.
++ * See struct rpi_firmware_property_tag_header for the per-tag
++ * structure.
++ */
++int rpi_firmware_property_list(struct rpi_firmware *fw,
++			       void *data, size_t tag_size)
++{
++	size_t size = tag_size + 12;
++	u32 *buf;
++	dma_addr_t bus_addr;
++	int ret;
++
++	/* Packets are processed a dword at a time. */
++	if (size & 3)
++		return -EINVAL;
++
++	buf = dma_alloc_coherent(fw->cl.dev, PAGE_ALIGN(size), &bus_addr,
++				 GFP_ATOMIC);
++	if (!buf)
++		return -ENOMEM;
++
++	/* The firmware will error out without parsing in this case. */
++	WARN_ON(size >= 1024 * 1024);
++
++	buf[0] = size;
++	buf[1] = RPI_FIRMWARE_STATUS_REQUEST;
++	memcpy(&buf[2], data, tag_size);
++	buf[size / 4 - 1] = RPI_FIRMWARE_PROPERTY_END;
++	wmb();
++
++	ret = rpi_firmware_transaction(fw, MBOX_CHAN_PROPERTY, bus_addr);
++
++	rmb();
++	memcpy(data, &buf[2], tag_size);
++	if (ret == 0 && buf[1] != RPI_FIRMWARE_STATUS_SUCCESS) {
++		/*
++		 * The tag name here might not be the one causing the
++		 * error, if there were multiple tags in the request.
++		 * But single-tag is the most common, so go with it.
++		 */
++		dev_err(fw->cl.dev, "Request 0x%08x returned status 0x%08x\n",
++			buf[2], buf[1]);
++		ret = -EINVAL;
++	}
++
++	dma_free_coherent(fw->cl.dev, PAGE_ALIGN(size), buf, bus_addr);
++
++	return ret;
++}
++EXPORT_SYMBOL_GPL(rpi_firmware_property_list);
++
++/**
++ * rpi_firmware_property - Submit single firmware property
++ * @fw:		Pointer to firmware structure from rpi_firmware_get().
++ * @tag:	One of enum_mbox_property_tag.
++ * @tag_data:	Tag data buffer.
++ * @buf_size:	Buffer size.
++ *
++ * Submits a single tag to the VPU firmware through the mailbox
++ * property interface.
++ *
++ * This is a convenience wrapper around
++ * rpi_firmware_property_list() to avoid some of the
++ * boilerplate in property calls.
++ */
++int rpi_firmware_property(struct rpi_firmware *fw,
++			  u32 tag, void *tag_data, size_t buf_size)
++{
++	/* Single tags are very small (generally 8 bytes), so the
++	 * stack should be safe.
++	 */
++	u8 data[buf_size + sizeof(struct rpi_firmware_property_tag_header)];
++	struct rpi_firmware_property_tag_header *header =
++		(struct rpi_firmware_property_tag_header *)data;
++	int ret;
++
++	header->tag = tag;
++	header->buf_size = buf_size;
++	header->req_resp_size = 0;
++	memcpy(data + sizeof(struct rpi_firmware_property_tag_header),
++	       tag_data, buf_size);
++
++	ret = rpi_firmware_property_list(fw, &data, sizeof(data));
++	memcpy(tag_data,
++	       data + sizeof(struct rpi_firmware_property_tag_header),
++	       buf_size);
++
++	return ret;
++}
++EXPORT_SYMBOL_GPL(rpi_firmware_property);
++
++static void
++rpi_firmware_print_firmware_revision(struct rpi_firmware *fw)
++{
++	u32 packet;
++	int ret = rpi_firmware_property(fw,
++					RPI_FIRMWARE_GET_FIRMWARE_REVISION,
++					&packet, sizeof(packet));
++
++	if (ret == 0) {
++		struct tm tm;
++
++		time_to_tm(packet, 0, &tm);
++
++		dev_info(fw->cl.dev,
++			 "Attached to firmware from %04ld-%02d-%02d %02d:%02d\n",
++			 tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
++			 tm.tm_hour, tm.tm_min);
++	}
++}
++
++static int rpi_firmware_probe(struct platform_device *pdev)
++{
++	struct device *dev = &pdev->dev;
++	struct rpi_firmware *fw;
++
++	fw = devm_kzalloc(dev, sizeof(*fw), GFP_KERNEL);
++	if (!fw)
++		return -ENOMEM;
++
++	fw->cl.dev = dev;
++	fw->cl.rx_callback = response_callback;
++	fw->cl.tx_block = true;
++
++	fw->chan = mbox_request_channel(&fw->cl, 0);
++	if (IS_ERR(fw->chan)) {
++		int ret = PTR_ERR(fw->chan);
++		if (ret != -EPROBE_DEFER)
++			dev_err(dev, "Failed to get mbox channel: %d\n", ret);
++		return ret;
++	}
++
++	init_completion(&fw->c);
++
++	platform_set_drvdata(pdev, fw);
++
++	rpi_firmware_print_firmware_revision(fw);
++
++	return 0;
++}
++
++static int rpi_firmware_remove(struct platform_device *pdev)
++{
++	struct rpi_firmware *fw = platform_get_drvdata(pdev);
++
++	mbox_free_channel(fw->chan);
++
++	return 0;
++}
++
++/**
++ * rpi_firmware_get - Get pointer to rpi_firmware structure.
++ * @firmware_node:    Pointer to the firmware Device Tree node.
++ *
++ * Returns NULL is the firmware device is not ready.
++ */
++struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node)
++{
++	struct platform_device *pdev = of_find_device_by_node(firmware_node);
++
++	if (!pdev)
++		return NULL;
++
++	return platform_get_drvdata(pdev);
++}
++EXPORT_SYMBOL_GPL(rpi_firmware_get);
++
++static const struct of_device_id rpi_firmware_of_match[] = {
++	{ .compatible = "raspberrypi,bcm2835-firmware", },
++	{},
++};
++MODULE_DEVICE_TABLE(of, rpi_firmware_of_match);
++
++static struct platform_driver rpi_firmware_driver = {
++	.driver = {
++		.name = "raspberrypi-firmware",
++		.of_match_table = rpi_firmware_of_match,
++	},
++	.probe		= rpi_firmware_probe,
++	.remove		= rpi_firmware_remove,
++};
++module_platform_driver(rpi_firmware_driver);
++
++MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
++MODULE_DESCRIPTION("Raspberry Pi firmware driver");
++MODULE_LICENSE("GPL v2");
+--- /dev/null
++++ b/include/soc/bcm2835/raspberrypi-firmware.h
+@@ -0,0 +1,115 @@
++/*
++ *  Copyright © 2015 Broadcom
++ *
++ * 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.
++ */
++
++#include <linux/types.h>
++#include <linux/of_device.h>
++
++struct rpi_firmware;
++
++enum rpi_firmware_property_status {
++	RPI_FIRMWARE_STATUS_REQUEST = 0,
++	RPI_FIRMWARE_STATUS_SUCCESS = 0x80000000,
++	RPI_FIRMWARE_STATUS_ERROR =   0x80000001,
++};
++
++/**
++ * struct rpi_firmware_property_tag_header - Firmware property tag header
++ * @tag:		One of enum_mbox_property_tag.
++ * @buf_size:		The number of bytes in the value buffer following this
++ *			struct.
++ * @req_resp_size:	On submit, the length of the request (though it doesn't
++ *			appear to be currently used by the firmware).  On return,
++ *			the length of the response (always 4 byte aligned), with
++ *			the low bit set.
++ */
++struct rpi_firmware_property_tag_header {
++	u32 tag;
++	u32 buf_size;
++	u32 req_resp_size;
++};
++
++enum rpi_firmware_property_tag {
++	RPI_FIRMWARE_PROPERTY_END =                           0,
++	RPI_FIRMWARE_GET_FIRMWARE_REVISION =                  0x00000001,
++
++	RPI_FIRMWARE_SET_CURSOR_INFO =                        0x00008010,
++	RPI_FIRMWARE_SET_CURSOR_STATE =                       0x00008011,
++
++	RPI_FIRMWARE_GET_BOARD_MODEL =                        0x00010001,
++	RPI_FIRMWARE_GET_BOARD_REVISION =                     0x00010002,
++	RPI_FIRMWARE_GET_BOARD_MAC_ADDRESS =                  0x00010003,
++	RPI_FIRMWARE_GET_BOARD_SERIAL =                       0x00010004,
++	RPI_FIRMWARE_GET_ARM_MEMORY =                         0x00010005,
++	RPI_FIRMWARE_GET_VC_MEMORY =                          0x00010006,
++	RPI_FIRMWARE_GET_CLOCKS =                             0x00010007,
++	RPI_FIRMWARE_GET_POWER_STATE =                        0x00020001,
++	RPI_FIRMWARE_GET_TIMING =                             0x00020002,
++	RPI_FIRMWARE_SET_POWER_STATE =                        0x00028001,
++	RPI_FIRMWARE_GET_CLOCK_STATE =                        0x00030001,
++	RPI_FIRMWARE_GET_CLOCK_RATE =                         0x00030002,
++	RPI_FIRMWARE_GET_VOLTAGE =                            0x00030003,
++	RPI_FIRMWARE_GET_MAX_CLOCK_RATE =                     0x00030004,
++	RPI_FIRMWARE_GET_MAX_VOLTAGE =                        0x00030005,
++	RPI_FIRMWARE_GET_TEMPERATURE =                        0x00030006,
++	RPI_FIRMWARE_GET_MIN_CLOCK_RATE =                     0x00030007,
++	RPI_FIRMWARE_GET_MIN_VOLTAGE =                        0x00030008,
++	RPI_FIRMWARE_GET_TURBO =                              0x00030009,
++	RPI_FIRMWARE_GET_MAX_TEMPERATURE =                    0x0003000a,
++	RPI_FIRMWARE_ALLOCATE_MEMORY =                        0x0003000c,
++	RPI_FIRMWARE_LOCK_MEMORY =                            0x0003000d,
++	RPI_FIRMWARE_UNLOCK_MEMORY =                          0x0003000e,
++	RPI_FIRMWARE_RELEASE_MEMORY =                         0x0003000f,
++	RPI_FIRMWARE_EXECUTE_CODE =                           0x00030010,
++	RPI_FIRMWARE_EXECUTE_QPU =                            0x00030011,
++	RPI_FIRMWARE_SET_ENABLE_QPU =                         0x00030012,
++	RPI_FIRMWARE_GET_DISPMANX_RESOURCE_MEM_HANDLE =       0x00030014,
++	RPI_FIRMWARE_GET_EDID_BLOCK =                         0x00030020,
++	RPI_FIRMWARE_SET_CLOCK_STATE =                        0x00038001,
++	RPI_FIRMWARE_SET_CLOCK_RATE =                         0x00038002,
++	RPI_FIRMWARE_SET_VOLTAGE =                            0x00038003,
++	RPI_FIRMWARE_SET_TURBO =                              0x00038009,
++
++	/* Dispmanx TAGS */
++	RPI_FIRMWARE_FRAMEBUFFER_ALLOCATE =                   0x00040001,
++	RPI_FIRMWARE_FRAMEBUFFER_BLANK =                      0x00040002,
++	RPI_FIRMWARE_FRAMEBUFFER_GET_PHYSICAL_WIDTH_HEIGHT =  0x00040003,
++	RPI_FIRMWARE_FRAMEBUFFER_GET_VIRTUAL_WIDTH_HEIGHT =   0x00040004,
++	RPI_FIRMWARE_FRAMEBUFFER_GET_DEPTH =                  0x00040005,
++	RPI_FIRMWARE_FRAMEBUFFER_GET_PIXEL_ORDER =            0x00040006,
++	RPI_FIRMWARE_FRAMEBUFFER_GET_ALPHA_MODE =             0x00040007,
++	RPI_FIRMWARE_FRAMEBUFFER_GET_PITCH =                  0x00040008,
++	RPI_FIRMWARE_FRAMEBUFFER_GET_VIRTUAL_OFFSET =         0x00040009,
++	RPI_FIRMWARE_FRAMEBUFFER_GET_OVERSCAN =               0x0004000a,
++	RPI_FIRMWARE_FRAMEBUFFER_GET_PALETTE =                0x0004000b,
++	RPI_FIRMWARE_FRAMEBUFFER_RELEASE =                    0x00048001,
++	RPI_FIRMWARE_FRAMEBUFFER_TEST_PHYSICAL_WIDTH_HEIGHT = 0x00044003,
++	RPI_FIRMWARE_FRAMEBUFFER_TEST_VIRTUAL_WIDTH_HEIGHT =  0x00044004,
++	RPI_FIRMWARE_FRAMEBUFFER_TEST_DEPTH =                 0x00044005,
++	RPI_FIRMWARE_FRAMEBUFFER_TEST_PIXEL_ORDER =           0x00044006,
++	RPI_FIRMWARE_FRAMEBUFFER_TEST_ALPHA_MODE =            0x00044007,
++	RPI_FIRMWARE_FRAMEBUFFER_TEST_VIRTUAL_OFFSET =        0x00044009,
++	RPI_FIRMWARE_FRAMEBUFFER_TEST_OVERSCAN =              0x0004400a,
++	RPI_FIRMWARE_FRAMEBUFFER_TEST_PALETTE =               0x0004400b,
++	RPI_FIRMWARE_FRAMEBUFFER_SET_PHYSICAL_WIDTH_HEIGHT =  0x00048003,
++	RPI_FIRMWARE_FRAMEBUFFER_SET_VIRTUAL_WIDTH_HEIGHT =   0x00048004,
++	RPI_FIRMWARE_FRAMEBUFFER_SET_DEPTH =                  0x00048005,
++	RPI_FIRMWARE_FRAMEBUFFER_SET_PIXEL_ORDER =            0x00048006,
++	RPI_FIRMWARE_FRAMEBUFFER_SET_ALPHA_MODE =             0x00048007,
++	RPI_FIRMWARE_FRAMEBUFFER_SET_VIRTUAL_OFFSET =         0x00048009,
++	RPI_FIRMWARE_FRAMEBUFFER_SET_OVERSCAN =               0x0004800a,
++	RPI_FIRMWARE_FRAMEBUFFER_SET_PALETTE =                0x0004800b,
++
++	RPI_FIRMWARE_GET_COMMAND_LINE =                       0x00050001,
++	RPI_FIRMWARE_GET_DMA_CHANNELS =                       0x00060001,
++};
++
++int rpi_firmware_property(struct rpi_firmware *fw,
++			  u32 tag, void *data, size_t len);
++int rpi_firmware_property_list(struct rpi_firmware *fw,
++			       void *data, size_t tag_size);
++struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node);