ar71xx: rework chipidea controller support, add QCA9531

Rework (again) platform support for dual-role chipidea USB controller:

- include support for QCA9531
- use correct EHCI block size
- drop ar933x_usb_setup_ctrl_config() function
- simplify code after previous "register chipidea only in device mode"
  change (fa22714181)

Reworked patch was tested on devices with below QCA WiSOCs (signal/GPIO
name with required bootstrap state for USB bus 0 in device mode):

- AR9331  (GPIO13 pull-down)
- AR9342  (RGMII_TXD1/ETXD1 pull-up)
- AR9344  (GPIO20 pull-up)
- QCA9531 (GPIO13 pull-up)
- QCA9558 (GPIO13 pull-up)

The only way to select device mode for bus 0 is to change SOC bootstrap
configuration which is sampled only once, at hard reset. Likely, other
models, like QCA9556 or AR9341, should also support dual-role USB mode
but they were not tested.

Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>

target/linux/ar71xx/patches-4.9/920-usb-chipidea-AR933x-platform-support.patch

@@ -29,48 +29,35 @@
  
  #include <asm/mach-ath79/ath79.h>
  #include <asm/mach-ath79/ar71xx_regs.h>
-@@ -170,6 +173,64 @@ static void __init ar913x_usb_setup(void
+@@ -170,6 +173,44 @@ static void __init ar913x_usb_setup(void
  			   &ath79_ehci_pdata_v2, sizeof(ath79_ehci_pdata_v2));
  }
  
-+static void __init ar933x_usb_setup_ctrl_config(void)
++static void __init ar9xxx_ci_usb_setup(int bus_id, int irq)
-+{
-+	void __iomem *usb_ctrl_base, *usb_config_reg;
-+	u32 usb_config;
-+
-+	usb_ctrl_base = ioremap(AR71XX_USB_CTRL_BASE, AR71XX_USB_CTRL_SIZE);
-+	usb_config_reg = usb_ctrl_base + AR71XX_USB_CTRL_REG_CONFIG;
-+	usb_config = __raw_readl(usb_config_reg);
-+	usb_config &= ~AR933X_USB_CONFIG_HOST_ONLY;
-+	__raw_writel(usb_config, usb_config_reg);
-+	iounmap(usb_ctrl_base);
-+}
-+
-+static void __init ar9xxx_ci_usb_setup(int irq)
 +{
 +	struct ci_hdrc_platform_data ci_pdata;
-+	enum usb_dr_mode dr_mode;
 +	bool host_mode = true;
 +
 +	if (soc_is_ar933x())
 +		host_mode = ath79_reset_rr(AR933X_RESET_REG_BOOTSTRAP) &
 +			    AR933X_BOOTSTRAP_USB_MODE_HOST;
-+	else if (soc_is_ar934x() || soc_is_qca955x())
++	else
 +		host_mode = !(ath79_reset_rr(AR934X_RESET_REG_BOOTSTRAP) &
 +			      AR934X_BOOTSTRAP_USB_MODE_DEVICE);
 +
 +	if (host_mode) {
-+		dr_mode = USB_DR_MODE_HOST;
++		ath79_usb_register("ehci-platform", bus_id,
-+	} else {
++				   AR934X_EHCI_BASE, AR934X_EHCI_SIZE,
-+		dr_mode = USB_DR_MODE_PERIPHERAL;
++				   irq, &ath79_ehci_pdata_v2,
-+		if (soc_is_ar933x())
++				   sizeof(ath79_ehci_pdata_v2));
-+			ar933x_usb_setup_ctrl_config();
++
++		return;
 +	}
 +
 +	memset(&ci_pdata, 0, sizeof(ci_pdata));
 +	ci_pdata.name = "ci_hdrc_ar9xxx";
 +	ci_pdata.capoffset = DEF_CAPOFFSET;
-+	ci_pdata.dr_mode = dr_mode;
++	ci_pdata.dr_mode = USB_DR_MODE_PERIPHERAL;
 +	ci_pdata.flags = CI_HDRC_DUAL_ROLE_NOT_OTG | CI_HDRC_DP_ALWAYS_PULLUP;
 +	ci_pdata.vbus_extcon.edev = ERR_PTR(-ENODEV);
 +	ci_pdata.id_extcon.edev = ERR_PTR(-ENODEV);
@@ -79,22 +66,15 @@
 +	platform_device_register_simple("usb_phy_generic",
 +					PLATFORM_DEVID_AUTO, NULL, 0);
 +
-+	if (!host_mode)
 +	ath79_usb_register("ci_hdrc", -1,
-+				   AR933X_EHCI_BASE, AR933X_EHCI_SIZE,
-+				   irq, &ci_pdata, sizeof(ci_pdata));
-+	else
-+		ath79_usb_register("ehci-platform", -1,
 +			   AR934X_EHCI_BASE, AR934X_EHCI_SIZE,
-+				   irq, &ath79_ehci_pdata_v2,
++			   irq, &ci_pdata, sizeof(ci_pdata));
-+				   sizeof(ath79_ehci_pdata_v2));
-+
 +}
 +
  static void __init ar933x_usb_setup(void)
  {
  	ath79_device_reset_set(AR933X_RESET_USBSUS_OVERRIDE);
-@@ -181,10 +242,7 @@ static void __init ar933x_usb_setup(void
+@@ -181,10 +222,7 @@ static void __init ar933x_usb_setup(void
  	ath79_device_reset_clear(AR933X_RESET_USB_PHY);
  	mdelay(10);
  
@@ -102,11 +82,11 @@
 -			   AR933X_EHCI_BASE, AR933X_EHCI_SIZE,
 -			   ATH79_CPU_IRQ(3),
 -			   &ath79_ehci_pdata_v2, sizeof(ath79_ehci_pdata_v2));
-+	ar9xxx_ci_usb_setup(ATH79_CPU_IRQ(3));
++	ar9xxx_ci_usb_setup(-1, ATH79_CPU_IRQ(3));
  }
  
  static void enable_tx_tx_idp_violation_fix(unsigned base)
-@@ -230,10 +288,7 @@ static void __init ar934x_usb_setup(void
+@@ -230,10 +268,7 @@ static void __init ar934x_usb_setup(void
  	if (ath79_soc_rev >= 3)
  		ath79_ehci_pdata_v2.reset_notifier = ar934x_usb_reset_notifier;
  
@@ -114,11 +94,23 @@
 -			   AR934X_EHCI_BASE, AR934X_EHCI_SIZE,
 -			   ATH79_CPU_IRQ(3),
 -			   &ath79_ehci_pdata_v2, sizeof(ath79_ehci_pdata_v2));
-+	ar9xxx_ci_usb_setup(ATH79_CPU_IRQ(3));
++	ar9xxx_ci_usb_setup(-1, ATH79_CPU_IRQ(3));
  }
  
  static void __init qca953x_usb_setup(void)
-@@ -285,10 +340,7 @@ static void __init qca955x_usb_setup(voi
+@@ -254,10 +289,7 @@ static void __init qca953x_usb_setup(voi
+ 	ath79_device_reset_clear(QCA953X_RESET_USB_HOST);
+ 	udelay(1000);
+ 
+-	ath79_usb_register("ehci-platform", -1,
+-			   QCA953X_EHCI_BASE, QCA953X_EHCI_SIZE,
+-			   ATH79_CPU_IRQ(3),
+-			   &ath79_ehci_pdata_v2, sizeof(ath79_ehci_pdata_v2));
++	ar9xxx_ci_usb_setup(-1, ATH79_CPU_IRQ(3));
+ }
+ 
+ static void qca955x_usb_reset_notifier(struct platform_device *pdev)
+@@ -285,10 +317,7 @@ static void __init qca955x_usb_setup(voi
  {
  	ath79_ehci_pdata_v2.reset_notifier = qca955x_usb_reset_notifier;
  
@@ -126,7 +118,7 @@
 -			   QCA955X_EHCI0_BASE, QCA955X_EHCI_SIZE,
 -			   ATH79_IP3_IRQ(0),
 -			   &ath79_ehci_pdata_v2, sizeof(ath79_ehci_pdata_v2));
-+	ar9xxx_ci_usb_setup(ATH79_IP3_IRQ(0));
++	ar9xxx_ci_usb_setup(0, ATH79_IP3_IRQ(0));
  
  	ath79_usb_register("ehci-platform", 1,
  			   QCA955X_EHCI1_BASE, QCA955X_EHCI_SIZE,