brcm2708: rename target to bcm27xx

This change makes the names of Broadcom targets consistent by using
the common notation based on SoC/CPU ID (which is used internally
anyway), bcmXXXX instead of brcmXXXX.
This is even used for target TITLE in make menuconfig already,
only the short target name used brcm so far.

Despite, since subtargets range from bcm2708 to bcm2711, it seems
appropriate to use bcm27xx instead of bcm2708 (again, as already done
for BOARDNAME).

This also renames the packages brcm2708-userland and brcm2708-gpu-fw.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Acked-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 256 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-4.19/950-0088-bcm2835-virtgpio-Virtual-GPIO-driver.patch b/target/linux/bcm27xx/patches-4.19/950-0088-bcm2835-virtgpio-Virtual-GPIO-driver.patch
new file mode 100644
index 0000000000..6259fdc101
--- /dev/null
+++ b/target/linux/bcm27xx/patches-4.19/950-0088-bcm2835-virtgpio-Virtual-GPIO-driver.patch
@@ -0,0 +1,256 @@
+From 0f05af4c96c0272bb431ace33dd284a891e4fe41 Mon Sep 17 00:00:00 2001
+From: popcornmix <popcornmix@gmail.com>
+Date: Tue, 23 Feb 2016 19:56:04 +0000
+Subject: [PATCH] bcm2835-virtgpio: Virtual GPIO driver
+
+Add a virtual GPIO driver that uses the firmware mailbox interface to
+request that the VPU toggles LEDs.
+---
+ drivers/gpio/Kconfig         |   6 +
+ drivers/gpio/Makefile        |   1 +
+ drivers/gpio/gpio-bcm-virt.c | 214 +++++++++++++++++++++++++++++++++++
+ 3 files changed, 221 insertions(+)
+ create mode 100644 drivers/gpio/gpio-bcm-virt.c
+
+--- a/drivers/gpio/Kconfig
++++ b/drivers/gpio/Kconfig
+@@ -151,6 +151,12 @@ config GPIO_BCM_KONA
+ 	help
+ 	  Turn on GPIO support for Broadcom "Kona" chips.
+ 
++config GPIO_BCM_VIRT
++	bool "Broadcom Virt GPIO"
++	depends on OF_GPIO && RASPBERRYPI_FIRMWARE && (ARCH_BCM2835 || COMPILE_TEST)
++	help
++	  Turn on virtual GPIO support for Broadcom BCM283X chips.
++
+ config GPIO_BRCMSTB
+ 	tristate "BRCMSTB GPIO support"
+ 	default y if (ARCH_BRCMSTB || BMIPS_GENERIC)
+--- a/drivers/gpio/Makefile
++++ b/drivers/gpio/Makefile
+@@ -35,6 +35,7 @@ obj-$(CONFIG_GPIO_ASPEED)	+= gpio-aspeed
+ obj-$(CONFIG_GPIO_RASPBERRYPI_EXP)	+= gpio-raspberrypi-exp.o
+ obj-$(CONFIG_GPIO_BCM_KONA)	+= gpio-bcm-kona.o
+ obj-$(CONFIG_GPIO_BD9571MWV)	+= gpio-bd9571mwv.o
++obj-$(CONFIG_GPIO_BCM_VIRT)	+= gpio-bcm-virt.o
+ obj-$(CONFIG_GPIO_BRCMSTB)	+= gpio-brcmstb.o
+ obj-$(CONFIG_GPIO_BT8XX)	+= gpio-bt8xx.o
+ obj-$(CONFIG_GPIO_CLPS711X)	+= gpio-clps711x.o
+--- /dev/null
++++ b/drivers/gpio/gpio-bcm-virt.c
+@@ -0,0 +1,214 @@
++/*
++ *  brcmvirt GPIO driver
++ *
++ *  Copyright (C) 2012,2013 Dom Cobley <popcornmix@gmail.com>
++ *  Based on gpio-clps711x.c by Alexander Shiyan <shc_work@mail.ru>
++ *
++ * 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.
++ */
++
++#include <linux/err.h>
++#include <linux/gpio.h>
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/dma-mapping.h>
++#include <soc/bcm2835/raspberrypi-firmware.h>
++
++#define MODULE_NAME "brcmvirt-gpio"
++#define NUM_GPIO 2
++
++struct brcmvirt_gpio {
++	struct gpio_chip	gc;
++	u32 __iomem		*ts_base;
++	/* two packed 16-bit counts of enabled and disables
++           Allows host to detect a brief enable that was missed */
++	u32			enables_disables[NUM_GPIO];
++	dma_addr_t		bus_addr;
++};
++
++static int brcmvirt_gpio_dir_in(struct gpio_chip *gc, unsigned off)
++{
++	struct brcmvirt_gpio *gpio;
++	gpio = container_of(gc, struct brcmvirt_gpio, gc);
++	return -EINVAL;
++}
++
++static int brcmvirt_gpio_dir_out(struct gpio_chip *gc, unsigned off, int val)
++{
++	struct brcmvirt_gpio *gpio;
++	gpio = container_of(gc, struct brcmvirt_gpio, gc);
++	return 0;
++}
++
++static int brcmvirt_gpio_get(struct gpio_chip *gc, unsigned off)
++{
++	struct brcmvirt_gpio *gpio;
++	unsigned v;
++	gpio = container_of(gc, struct brcmvirt_gpio, gc);
++	v = readl(gpio->ts_base + off);
++	return (v >> off) & 1;
++}
++
++static void brcmvirt_gpio_set(struct gpio_chip *gc, unsigned off, int val)
++{
++	struct brcmvirt_gpio *gpio;
++	u16 enables, disables;
++	s16 diff;
++	bool lit;
++	gpio = container_of(gc, struct brcmvirt_gpio, gc);
++	enables  = gpio->enables_disables[off] >> 16;
++	disables = gpio->enables_disables[off] >>  0;
++	diff = (s16)(enables - disables);
++	lit = diff > 0;
++	if ((val && lit) || (!val && !lit))
++		return;
++	if (val)
++		enables++;
++	else
++		disables++;
++	diff = (s16)(enables - disables);
++	BUG_ON(diff != 0 && diff != 1);
++	gpio->enables_disables[off] = (enables << 16) | (disables << 0);
++	writel(gpio->enables_disables[off], gpio->ts_base + off);
++}
++
++static int brcmvirt_gpio_probe(struct platform_device *pdev)
++{
++	int err = 0;
++	struct device *dev = &pdev->dev;
++	struct device_node *np = dev->of_node;
++	struct device_node *fw_node;
++	struct rpi_firmware *fw;
++	struct brcmvirt_gpio *ucb;
++	u32 gpiovirtbuf;
++
++	fw_node = of_parse_phandle(np, "firmware", 0);
++	if (!fw_node) {
++		dev_err(dev, "Missing firmware node\n");
++		return -ENOENT;
++	}
++
++	fw = rpi_firmware_get(fw_node);
++	if (!fw)
++		return -EPROBE_DEFER;
++
++	ucb = devm_kzalloc(dev, sizeof *ucb, GFP_KERNEL);
++	if (!ucb) {
++		err = -EINVAL;
++		goto out;
++	}
++
++	ucb->ts_base = dma_zalloc_coherent(dev, PAGE_SIZE, &ucb->bus_addr, GFP_KERNEL);
++	if (!ucb->ts_base) {
++		pr_err("[%s]: failed to dma_alloc_coherent(%ld)\n",
++				__func__, PAGE_SIZE);
++		err = -ENOMEM;
++		goto out;
++	}
++
++	gpiovirtbuf = (u32)ucb->bus_addr;
++	err = rpi_firmware_property(fw, RPI_FIRMWARE_FRAMEBUFFER_SET_GPIOVIRTBUF,
++				    &gpiovirtbuf, sizeof(gpiovirtbuf));
++
++	if (err || gpiovirtbuf != 0) {
++		dev_warn(dev, "Failed to set gpiovirtbuf, trying to get err:%x\n", err);
++		dma_free_coherent(dev, PAGE_SIZE, ucb->ts_base, ucb->bus_addr);
++		ucb->ts_base = 0;
++		ucb->bus_addr = 0;
++	}
++
++	if (!ucb->ts_base) {
++		err = rpi_firmware_property(fw, RPI_FIRMWARE_FRAMEBUFFER_GET_GPIOVIRTBUF,
++					    &gpiovirtbuf, sizeof(gpiovirtbuf));
++
++		if (err) {
++			dev_err(dev, "Failed to get gpiovirtbuf\n");
++			goto out;
++		}
++
++		if (!gpiovirtbuf) {
++			dev_err(dev, "No virtgpio buffer\n");
++			err = -ENOENT;
++			goto out;
++		}
++
++		// mmap the physical memory
++		gpiovirtbuf &= ~0xc0000000;
++		ucb->ts_base = ioremap(gpiovirtbuf, 4096);
++		if (ucb->ts_base == NULL) {
++			dev_err(dev, "Failed to map physical address\n");
++			err = -ENOENT;
++			goto out;
++		}
++		ucb->bus_addr = 0;
++	}
++	ucb->gc.label = MODULE_NAME;
++	ucb->gc.owner = THIS_MODULE;
++	//ucb->gc.dev = dev;
++	ucb->gc.of_node = np;
++	ucb->gc.base = 100;
++	ucb->gc.ngpio = NUM_GPIO;
++
++	ucb->gc.direction_input = brcmvirt_gpio_dir_in;
++	ucb->gc.direction_output = brcmvirt_gpio_dir_out;
++	ucb->gc.get = brcmvirt_gpio_get;
++	ucb->gc.set = brcmvirt_gpio_set;
++	ucb->gc.can_sleep = true;
++
++	err = gpiochip_add(&ucb->gc);
++	if (err)
++		goto out;
++
++	platform_set_drvdata(pdev, ucb);
++
++	return 0;
++out:
++	if (ucb->bus_addr) {
++		dma_free_coherent(dev, PAGE_SIZE, ucb->ts_base, ucb->bus_addr);
++		ucb->bus_addr = 0;
++		ucb->ts_base = NULL;
++	} else if (ucb->ts_base) {
++		iounmap(ucb->ts_base);
++		ucb->ts_base = NULL;
++	}
++	return err;
++}
++
++static int brcmvirt_gpio_remove(struct platform_device *pdev)
++{
++	struct device *dev = &pdev->dev;
++	int err = 0;
++	struct brcmvirt_gpio *ucb = platform_get_drvdata(pdev);
++
++	gpiochip_remove(&ucb->gc);
++	if (ucb->bus_addr)
++		dma_free_coherent(dev, PAGE_SIZE, ucb->ts_base, ucb->bus_addr);
++	else if (ucb->ts_base)
++		iounmap(ucb->ts_base);
++	return err;
++}
++
++static const struct of_device_id __maybe_unused brcmvirt_gpio_ids[] = {
++	{ .compatible = "brcm,bcm2835-virtgpio" },
++	{ }
++};
++MODULE_DEVICE_TABLE(of, brcmvirt_gpio_ids);
++
++static struct platform_driver brcmvirt_gpio_driver = {
++	.driver	= {
++		.name		= MODULE_NAME,
++		.owner		= THIS_MODULE,
++		.of_match_table	= of_match_ptr(brcmvirt_gpio_ids),
++	},
++	.probe	= brcmvirt_gpio_probe,
++	.remove	= brcmvirt_gpio_remove,
++};
++module_platform_driver(brcmvirt_gpio_driver);
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Dom Cobley <popcornmix@gmail.com>");
++MODULE_DESCRIPTION("brcmvirt GPIO driver");
++MODULE_ALIAS("platform:brcmvirt-gpio");