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authorRafał Miłecki <rafal@milecki.pl>2016-10-01 16:22:43 +0200
committerRafał Miłecki <rafal@milecki.pl>2016-10-01 16:52:08 +0200
commitd7e41df24a6191f5482f52161e398a3c162199ca (patch)
tree2500a18255ac40e0774de25d2a64e7792fe3182f /target/linux/bcm53xx/patches-4.4/082-0003-USB-bcma-drop-Northstar-PHY-2.0-initialization-code.patch
parent7120a430133b6cfd90ab2b48965323946366e013 (diff)
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bcm53xx: switch to standalone USB 2.0 PHY driver
This drops built-in support for USB 2.0 PHY and starts using separated driver that was upstreamed & backported some time ago. Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Diffstat (limited to 'target/linux/bcm53xx/patches-4.4/082-0003-USB-bcma-drop-Northstar-PHY-2.0-initialization-code.patch')
-rw-r--r--target/linux/bcm53xx/patches-4.4/082-0003-USB-bcma-drop-Northstar-PHY-2.0-initialization-code.patch136
1 files changed, 136 insertions, 0 deletions
diff --git a/target/linux/bcm53xx/patches-4.4/082-0003-USB-bcma-drop-Northstar-PHY-2.0-initialization-code.patch b/target/linux/bcm53xx/patches-4.4/082-0003-USB-bcma-drop-Northstar-PHY-2.0-initialization-code.patch
new file mode 100644
index 0000000..0af94e6
--- /dev/null
+++ b/target/linux/bcm53xx/patches-4.4/082-0003-USB-bcma-drop-Northstar-PHY-2.0-initialization-code.patch
@@ -0,0 +1,136 @@
+From e8624859dde2ad07633dac7ec86629a516411ea1 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Wed, 21 Sep 2016 18:01:43 +0200
+Subject: [PATCH] USB: bcma: drop Northstar PHY 2.0 initialization code
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+This driver should initialize controller only, PHY initialization should
+be handled by separated PHY driver. We already have phy-bcm-ns-usb2 in
+place so let it makes its duty.
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ drivers/usb/host/bcma-hcd.c | 80 ++++++++++++++-------------------------------
+ 1 file changed, 25 insertions(+), 55 deletions(-)
+
+--- a/drivers/usb/host/bcma-hcd.c
++++ b/drivers/usb/host/bcma-hcd.c
+@@ -239,44 +239,10 @@ static int bcma_hcd_usb20_old_arm_init(s
+ return 0;
+ }
+
+-static void bcma_hcd_init_chip_arm_phy(struct bcma_device *dev)
+-{
+- struct bcma_device *arm_core;
+- void __iomem *dmu;
+-
+- arm_core = bcma_find_core(dev->bus, BCMA_CORE_ARMCA9);
+- if (!arm_core) {
+- dev_err(&dev->dev, "can not find ARM Cortex A9 ihost core\n");
+- return;
+- }
+-
+- dmu = ioremap_nocache(arm_core->addr_s[0], 0x1000);
+- if (!dmu) {
+- dev_err(&dev->dev, "can not map ARM Cortex A9 ihost core\n");
+- return;
+- }
+-
+- /* Unlock DMU PLL settings */
+- iowrite32(0x0000ea68, dmu + 0x180);
+-
+- /* Write USB 2.0 PLL control setting */
+- iowrite32(0x00dd10c3, dmu + 0x164);
+-
+- /* Lock DMU PLL settings */
+- iowrite32(0x00000000, dmu + 0x180);
+-
+- iounmap(dmu);
+-}
+-
+-static void bcma_hcd_init_chip_arm_hc(struct bcma_device *dev)
++static void bcma_hcd_usb20_ns_init_hc(struct bcma_device *dev)
+ {
+ u32 val;
+
+- /*
+- * Delay after PHY initialized to ensure HC is ready to be configured
+- */
+- usleep_range(1000, 2000);
+-
+ /* Set packet buffer OUT threshold */
+ val = bcma_read32(dev, 0x94);
+ val &= 0xffff;
+@@ -287,20 +253,33 @@ static void bcma_hcd_init_chip_arm_hc(st
+ val = bcma_read32(dev, 0x9c);
+ val |= 1;
+ bcma_write32(dev, 0x9c, val);
++
++ /*
++ * Broadcom initializes PHY and then waits to ensure HC is ready to be
++ * configured. In our case the order is reversed. We just initialized
++ * controller and we let HCD initialize PHY, so let's wait (sleep) now.
++ */
++ usleep_range(1000, 2000);
+ }
+
+-static void bcma_hcd_init_chip_arm(struct bcma_device *dev)
++/**
++ * bcma_hcd_usb20_ns_init - Initialize Northstar USB 2.0 controller
++ */
++static int bcma_hcd_usb20_ns_init(struct bcma_hcd_device *bcma_hcd)
+ {
+- bcma_core_enable(dev, 0);
++ struct bcma_device *core = bcma_hcd->core;
++ struct bcma_chipinfo *ci = &core->bus->chipinfo;
++ struct device *dev = &core->dev;
++
++ bcma_core_enable(core, 0);
+
+- if (dev->bus->chipinfo.id == BCMA_CHIP_ID_BCM4707 ||
+- dev->bus->chipinfo.id == BCMA_CHIP_ID_BCM53018) {
+- if (dev->bus->chipinfo.pkg == BCMA_PKG_ID_BCM4707 ||
+- dev->bus->chipinfo.pkg == BCMA_PKG_ID_BCM4708)
+- bcma_hcd_init_chip_arm_phy(dev);
++ if (ci->id == BCMA_CHIP_ID_BCM4707 ||
++ ci->id == BCMA_CHIP_ID_BCM53018)
++ bcma_hcd_usb20_ns_init_hc(core);
+
+- bcma_hcd_init_chip_arm_hc(dev);
+- }
++ of_platform_default_populate(dev->of_node, NULL, dev);
++
++ return 0;
+ }
+
+ static void bcma_hci_platform_power_gpio(struct bcma_device *dev, bool val)
+@@ -373,16 +352,7 @@ static int bcma_hcd_usb20_init(struct bc
+ if (dma_set_mask_and_coherent(dev->dma_dev, DMA_BIT_MASK(32)))
+ return -EOPNOTSUPP;
+
+- switch (dev->id.id) {
+- case BCMA_CORE_NS_USB20:
+- bcma_hcd_init_chip_arm(dev);
+- break;
+- case BCMA_CORE_USB20_HOST:
+- bcma_hcd_init_chip_mips(dev);
+- break;
+- default:
+- return -ENODEV;
+- }
++ bcma_hcd_init_chip_mips(dev);
+
+ /* In AI chips EHCI is addrspace 0, OHCI is 1 */
+ ohci_addr = dev->addr_s[0];
+@@ -451,7 +421,7 @@ static int bcma_hcd_probe(struct bcma_de
+ err = -ENOTSUPP;
+ break;
+ case BCMA_CORE_NS_USB20:
+- err = bcma_hcd_usb20_init(usb_dev);
++ err = bcma_hcd_usb20_ns_init(usb_dev);
+ break;
+ case BCMA_CORE_NS_USB30:
+ err = bcma_hcd_usb30_init(usb_dev);