openwrtv3/target/linux/bcm53xx/patches-4.4/082-0003-USB-bcma-drop-Northstar-PHY-2.0-initialization-code.patch
Rafał Miłecki d7e41df24a 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>
2016-10-01 16:52:08 +02:00

136 lines
4 KiB
Diff

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);