diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0533-brcmvirt_gpio-Create-coherent-buffer-and-push-to-fir.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0533-brcmvirt_gpio-Create-coherent-buffer-and-push-to-fir.patch | 169 |
1 files changed, 0 insertions, 169 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0533-brcmvirt_gpio-Create-coherent-buffer-and-push-to-fir.patch b/target/linux/brcm2708/patches-4.4/0533-brcmvirt_gpio-Create-coherent-buffer-and-push-to-fir.patch deleted file mode 100644 index cc2951c057..0000000000 --- a/target/linux/brcm2708/patches-4.4/0533-brcmvirt_gpio-Create-coherent-buffer-and-push-to-fir.patch +++ /dev/null @@ -1,169 +0,0 @@ -From 3f948a5f5bb5c736fa051a98fffacc3200d0e40e Mon Sep 17 00:00:00 2001 -From: popcornmix <popcornmix@gmail.com> -Date: Wed, 9 Nov 2016 22:42:39 +0000 -Subject: [PATCH] brcmvirt_gpio: Create coherent buffer and push to firmware - ---- - drivers/gpio/gpio-bcm-virt.c | 88 +++++++++++++++++++++--------- - include/soc/bcm2835/raspberrypi-firmware.h | 1 + - 2 files changed, 62 insertions(+), 27 deletions(-) - ---- a/drivers/gpio/gpio-bcm-virt.c -+++ b/drivers/gpio/gpio-bcm-virt.c -@@ -15,6 +15,7 @@ - #include <linux/module.h> - #include <linux/basic_mmio_gpio.h> - #include <linux/platform_device.h> -+#include <linux/dma-mapping.h> - #include <soc/bcm2835/raspberrypi-firmware.h> - - #define MODULE_NAME "brcmvirt-gpio" -@@ -26,6 +27,7 @@ struct brcmvirt_gpio { - /* 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) -@@ -76,13 +78,13 @@ static void brcmvirt_gpio_set(struct gpi - - 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; -- int err = 0; - - fw_node = of_parse_phandle(np, "firmware", 0); - if (!fw_node) { -@@ -94,35 +96,56 @@ static int brcmvirt_gpio_probe(struct pl - if (!fw) - return -EPROBE_DEFER; - -- err = rpi_firmware_property(fw, RPI_FIRMWARE_FRAMEBUFFER_GET_GPIOVIRTBUF, -- &gpiovirtbuf, sizeof(gpiovirtbuf)); -- -- if (err) { -- dev_err(dev, "Failed to get gpiovirtbuf\n"); -- goto err; -- } -- -- if (!gpiovirtbuf) { -- dev_err(dev, "No virtgpio buffer\n"); -- err = -ENOENT; -- goto err; -- } -- - ucb = devm_kzalloc(dev, sizeof *ucb, GFP_KERNEL); - if (!ucb) { - err = -EINVAL; -- goto err; -+ 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 err; -+ ucb->ts_base = dma_zalloc_coherent(NULL, 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(NULL, 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; -@@ -138,13 +161,21 @@ static int brcmvirt_gpio_probe(struct pl - - err = gpiochip_add(&ucb->gc); - if (err) -- goto err; -+ goto out; - - platform_set_drvdata(pdev, ucb); - --err: -+ return 0; -+out: -+ if (ucb->bus_addr) { -+ dma_free_coherent(NULL, 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) -@@ -153,7 +184,10 @@ static int brcmvirt_gpio_remove(struct p - struct brcmvirt_gpio *ucb = platform_get_drvdata(pdev); - - gpiochip_remove(&ucb->gc); -- iounmap(ucb->ts_base); -+ if (ucb->bus_addr) -+ dma_free_coherent(NULL, PAGE_SIZE, ucb->ts_base, ucb->bus_addr); -+ else if (ucb->ts_base) -+ iounmap(ucb->ts_base); - return err; - } - ---- a/include/soc/bcm2835/raspberrypi-firmware.h -+++ b/include/soc/bcm2835/raspberrypi-firmware.h -@@ -118,6 +118,7 @@ enum rpi_firmware_property_tag { - RPI_FIRMWARE_FRAMEBUFFER_SET_OVERSCAN = 0x0004800a, - RPI_FIRMWARE_FRAMEBUFFER_SET_PALETTE = 0x0004800b, - RPI_FIRMWARE_FRAMEBUFFER_SET_TOUCHBUF = 0x0004801f, -+ RPI_FIRMWARE_FRAMEBUFFER_SET_GPIOVIRTBUF = 0x00048020, - RPI_FIRMWARE_FRAMEBUFFER_SET_VSYNC = 0x0004800e, - RPI_FIRMWARE_FRAMEBUFFER_SET_BACKLIGHT = 0x0004800f, - |