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bcm53xx: switch to standalone USB 2.0 PHY driver

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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>
v19.07.3_mercusys_ac12_duma
Rafał Miłecki 8 years ago
parent 7120a43013
commit d7e41df24a
4 changed files with 142 additions and 128 deletions
Show Stats Download Patch File Download Diff File

4
target/linux/bcm53xx/image/Makefile
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@ -72,8 +72,8 @@ DEVICE_VARS += PRODUCTID SIGNATURE NETGEAR_BOARD_ID NETGEAR_REGION
BRCMFMAC_43602A1 := kmod-brcmfmac brcmfmac-firmware-43602a1-pcie
BRCMFMAC_4366B1 := kmod-brcmfmac brcmfmac-firmware-4366b1-pcie
USB2_PACKAGES := kmod-usb-ohci kmod-usb2
USB3_PACKAGES := kmod-usb-ohci kmod-usb2 kmod-usb3
USB2_PACKAGES := kmod-usb-ohci kmod-usb2 kmod-phy-bcm-ns-usb2
USB3_PACKAGES := kmod-usb-ohci kmod-usb2 kmod-usb3 kmod-phy-bcm-ns-usb2
define Device/Default
# .dtb files are prefixed by SoC type, e.g. bcm4708- which is not included in device/image names

136
target/linux/bcm53xx/patches-4.4/082-0003-USB-bcma-drop-Northstar-PHY-2.0-initialization-code.patch
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@ -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);

8
target/linux/bcm53xx/patches-4.4/197-USB-bcma-add-USB-3.0-support.patch
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@ -30,7 +30,7 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
struct gpio_desc *gpio_desc;
};
@@ -319,6 +321,10 @@ static const struct usb_ehci_pdata ehci_
@@ -298,6 +300,10 @@ static const struct usb_ehci_pdata ehci_
static const struct usb_ohci_pdata ohci_pdata = {
};
@ -41,7 +41,7 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
static struct platform_device *bcma_hcd_create_pdev(struct bcma_device *dev,
const char *name, u32 addr,
const void *data,
@@ -412,6 +418,150 @@ err_unregister_ohci_dev:
@@ -382,6 +388,150 @@ err_unregister_ohci_dev:
return err;
}
@ -192,7 +192,7 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
static int bcma_hcd_usb30_init(struct bcma_hcd_device *bcma_hcd)
{
struct bcma_device *core = bcma_hcd->core;
@@ -419,7 +569,13 @@ static int bcma_hcd_usb30_init(struct bc
@@ -389,7 +539,13 @@ static int bcma_hcd_usb30_init(struct bc
bcma_core_enable(core, 0);
@ -207,7 +207,7 @@ Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
return 0;
}
@@ -471,11 +627,14 @@ static void bcma_hcd_remove(struct bcma_
@@ -441,11 +597,14 @@ static void bcma_hcd_remove(struct bcma_
struct bcma_hcd_device *usb_dev = bcma_get_drvdata(dev);
struct platform_device *ohci_dev = usb_dev->ohci_dev;
struct platform_device *ehci_dev = usb_dev->ehci_dev;

122
target/linux/bcm53xx/patches-4.4/811-USB-bcma-improve-USB-2.0-PHY-support-for-BCM4709-and.patch
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@ -1,122 +0,0 @@
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
Subject: [PATCH] USB: bcma: improve USB 2.0 PHY support for BCM4709 and
BCM47094
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
---
--- a/drivers/usb/host/bcma-hcd.c
+++ b/drivers/usb/host/bcma-hcd.c
@@ -32,6 +32,17 @@
#include <linux/usb/ohci_pdriver.h>
#include <linux/usb/xhci_pdriver.h>
+/* DMU (Device Management Unit) */
+#define BCMA_DMU_CRU_USB2_CONTROL 0x0164
+#define BCMA_DMU_CRU_USB2_CONTROL_USB_PLL_NDIV_MASK 0x00000FFC
+#define BCMA_DMU_CRU_USB2_CONTROL_USB_PLL_NDIV_SHIFT 2
+#define BCMA_DMU_CRU_USB2_CONTROL_USB_PLL_PDIV_MASK 0x00007000
+#define BCMA_DMU_CRU_USB2_CONTROL_USB_PLL_PDIV_SHIFT 12
+#define BCMA_DMU_CRU_CLKSET_KEY 0x0180
+#define BCMA_DMU_CRU_STRAPS_CTRL 0x02A0
+#define BCMA_DMU_CRU_STRAPS_CTRL_USB3 0x00000010
+#define BCMA_DMU_CRU_STRAPS_CTRL_4BYTE 0x00008000
+
MODULE_AUTHOR("Hauke Mehrtens");
MODULE_DESCRIPTION("Common USB driver for BCMA Bus");
MODULE_LICENSE("GPL");
@@ -241,10 +252,35 @@ static int bcma_hcd_usb20_old_arm_init(s
return 0;
}
+static u32 bcma_hcd_usb_ref_clk_get_rate(void __iomem *dmu)
+{
+ u32 val, ndiv, pdiv, ch2_mdiv, ch2_freq;
+
+ /* get divider integer from the cru_genpll_control5 */
+ val = ioread32(dmu + 0x154);
+ ndiv = (val >> 20) & 0x3ff;
+ if (ndiv == 0)
+ ndiv = 1 << 10;
+
+ /* get pdiv and ch2_mdiv from the cru_genpll_control6 */
+ val = ioread32(dmu + 0x158);
+ pdiv = (val >> 24) & 0x7;
+ pdiv = (pdiv == 0) ? (1 << 3) : pdiv;
+
+ ch2_mdiv = val & 0xff;
+ ch2_mdiv = (ch2_mdiv == 0) ? (1 << 8) : ch2_mdiv;
+
+ /* calculate ch2_freq based on 25MHz reference clock */
+ ch2_freq = (25000000 / (pdiv * ch2_mdiv)) * ndiv;
+
+ return ch2_freq;
+}
+
static void bcma_hcd_init_chip_arm_phy(struct bcma_device *dev)
{
struct bcma_device *arm_core;
void __iomem *dmu;
+ u32 ref_clk_rate, usb2ctl, usb_pll_ndiv, usb_pll_pdiv;
arm_core = bcma_find_core(dev->bus, BCMA_CORE_ARMCA9);
if (!arm_core) {
@@ -258,14 +294,29 @@ static void bcma_hcd_init_chip_arm_phy(s
return;
}
+ ref_clk_rate = bcma_hcd_usb_ref_clk_get_rate(dmu);
+
+ usb2ctl = ioread32(dmu + BCMA_DMU_CRU_USB2_CONTROL);
+
+ usb_pll_pdiv = usb2ctl;
+ usb_pll_pdiv &= BCMA_DMU_CRU_USB2_CONTROL_USB_PLL_PDIV_MASK;
+ usb_pll_pdiv >>= BCMA_DMU_CRU_USB2_CONTROL_USB_PLL_PDIV_SHIFT;
+ if (!usb_pll_pdiv)
+ usb_pll_pdiv = 1 << 3;
+
+ /* Calculate ndiv based on a solid 1920 MHz that is for USB2 PHY */
+ usb_pll_ndiv = (1920000000 * usb_pll_pdiv) / ref_clk_rate;
+
/* Unlock DMU PLL settings */
- iowrite32(0x0000ea68, dmu + 0x180);
+ iowrite32(0x0000ea68, dmu + BCMA_DMU_CRU_CLKSET_KEY);
/* Write USB 2.0 PLL control setting */
- iowrite32(0x00dd10c3, dmu + 0x164);
+ usb2ctl &= ~BCMA_DMU_CRU_USB2_CONTROL_USB_PLL_NDIV_MASK;
+ usb2ctl |= usb_pll_ndiv << BCMA_DMU_CRU_USB2_CONTROL_USB_PLL_NDIV_SHIFT;
+ iowrite32(usb2ctl, dmu + BCMA_DMU_CRU_USB2_CONTROL);
/* Lock DMU PLL settings */
- iowrite32(0x00000000, dmu + 0x180);
+ iowrite32(0x00000000, dmu + BCMA_DMU_CRU_CLKSET_KEY);
iounmap(dmu);
}
@@ -293,15 +344,17 @@ static void bcma_hcd_init_chip_arm_hc(st
static void bcma_hcd_init_chip_arm(struct bcma_device *dev)
{
+ struct bcma_chipinfo *chipinfo = &dev->bus->chipinfo;
+
bcma_core_enable(dev, 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 (chipinfo->id == BCMA_CHIP_ID_BCM4707 ||
+ chipinfo->id == BCMA_CHIP_ID_BCM47094 ||
+ chipinfo->id == BCMA_CHIP_ID_BCM53018) {
+ bcma_hcd_init_chip_arm_phy(dev);
- bcma_hcd_init_chip_arm_hc(dev);
+ if (1) /* TODO: Exclude BCM53573 */
+ bcma_hcd_init_chip_arm_hc(dev);
}
}
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