--- /dev/null
+From 14909c4e4e836925668e74fc6e0e85ba0283cbf9 Mon Sep 17 00:00:00 2001
+From: Hauke Mehrtens <hauke@hauke-m.de>
+Date: Fri, 6 Jan 2017 17:40:12 +0100
+Subject: [PATCH 2/2] MIPS: lantiq: improve USB initialization
+
+This adds code to initialize the USB controller and PHY also on Danube,
+Amazon SE and AR10. This code is based on the Vendor driver from
+different UGW versions and compared to the hardware documentation.
+
+Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
+---
+ arch/mips/lantiq/xway/reset.c | 120 ++++++++++++++++++++++++++++++----------
+ arch/mips/lantiq/xway/sysctrl.c | 20 +++++++
+ 2 files changed, 110 insertions(+), 30 deletions(-)
+
+--- a/arch/mips/lantiq/xway/reset.c
++++ b/arch/mips/lantiq/xway/reset.c
+@@ -72,6 +72,8 @@
+ #define RCU_USBCFG_HDSEL_BIT BIT(11)
+ #define RCU_USBCFG_HOST_END_BIT BIT(10)
+ #define RCU_USBCFG_SLV_END_BIT BIT(9)
++#define RCU_USBCFG_SLV_END_BIT_AR9 BIT(17)
++
+
+ /* USB reset bits */
+ #define RCU_USBRESET 0x0010
+@@ -85,6 +87,8 @@
+
+ #define RCU_CFG1A 0x0038
+ #define RCU_CFG1B 0x003C
++#define RCU_CFG1_TX_PEE BIT(0)
++#define RCU_CFG1_DIS_THR_SHIFT 15 /* Disconnect Threshold */
+
+ /* USB PMU devices */
+ #define PMU_AHBM BIT(15)
+@@ -306,38 +310,91 @@ static void ltq_usb_init(void)
+ /* Power for USB cores 1 & 2 */
+ ltq_pmu_enable(PMU_AHBM);
+ ltq_pmu_enable(PMU_USB0);
+- ltq_pmu_enable(PMU_USB1);
+
+- ltq_rcu_w32(ltq_rcu_r32(RCU_CFG1A) | BIT(0), RCU_CFG1A);
+- ltq_rcu_w32(ltq_rcu_r32(RCU_CFG1B) | BIT(0), RCU_CFG1B);
++ if (of_machine_is_compatible("lantiq,ar10") ||
++ of_machine_is_compatible("lantiq,grx390") ||
++ of_machine_is_compatible("lantiq,ar9") ||
++ of_machine_is_compatible("lantiq,vr9"))
++ ltq_pmu_enable(PMU_USB1);
++
++ if (of_machine_is_compatible("lantiq,vr9") ||
++ of_machine_is_compatible("lantiq,ar10")) {
++ ltq_rcu_w32(ltq_rcu_r32(RCU_CFG1A) | RCU_CFG1_TX_PEE |
++ 7 << RCU_CFG1_DIS_THR_SHIFT, RCU_CFG1A);
++ ltq_rcu_w32(ltq_rcu_r32(RCU_CFG1B) | RCU_CFG1_TX_PEE |
++ 7 << RCU_CFG1_DIS_THR_SHIFT, RCU_CFG1B);
++ }
+
+ /* Enable USB PHY power for cores 1 & 2 */
+ ltq_pmu_enable(PMU_USB0_P);
+- ltq_pmu_enable(PMU_USB1_P);
++ if (of_machine_is_compatible("lantiq,ar10") ||
++ of_machine_is_compatible("lantiq,grx390") ||
++ of_machine_is_compatible("lantiq,ar9") ||
++ of_machine_is_compatible("lantiq,vr9"))
++ ltq_pmu_enable(PMU_USB1_P);
++
++ if (of_machine_is_compatible("lantiq,ase") ||
++ of_machine_is_compatible("lantiq,danube")) {
++ /* Configure cores to host mode */
++ ltq_rcu_w32(ltq_rcu_r32(RCU_USB1CFG) & ~RCU_USBCFG_HDSEL_BIT,
++ RCU_USB1CFG);
++
++ /* Select DMA endianness (Host-endian: big-endian) */
++ ltq_rcu_w32((ltq_rcu_r32(RCU_USB1CFG) & ~RCU_USBCFG_SLV_END_BIT)
++ | RCU_USBCFG_HOST_END_BIT, RCU_USB1CFG);
++ }
++
++ if (of_machine_is_compatible("lantiq,ar9")) {
++ /* Configure cores to host mode */
++ ltq_rcu_w32(ltq_rcu_r32(RCU_USB1CFG) & ~RCU_USBCFG_HDSEL_BIT,
++ RCU_USB1CFG);
++ ltq_rcu_w32(ltq_rcu_r32(RCU_USB2CFG) & ~RCU_USBCFG_HDSEL_BIT,
++ RCU_USB2CFG);
++
++ /* Select DMA endianness (Host-endian: big-endian) */
++ ltq_rcu_w32((ltq_rcu_r32(RCU_USB1CFG) & ~RCU_USBCFG_SLV_END_BIT_AR9)
++ | RCU_USBCFG_HOST_END_BIT, RCU_USB1CFG);
++ ltq_rcu_w32(ltq_rcu_r32((RCU_USB2CFG) & ~RCU_USBCFG_SLV_END_BIT_AR9)
++ | RCU_USBCFG_HOST_END_BIT, RCU_USB2CFG);
++ }
++
++ if (of_machine_is_compatible("lantiq,vr9") ||
++ of_machine_is_compatible("lantiq,ar10")) {
++ /* Configure cores to host mode */
++ ltq_rcu_w32(ltq_rcu_r32(RCU_USB1CFG) & ~RCU_USBCFG_HDSEL_BIT,
++ RCU_USB1CFG);
++ ltq_rcu_w32(ltq_rcu_r32(RCU_USB2CFG) & ~RCU_USBCFG_HDSEL_BIT,
++ RCU_USB2CFG);
++
++ /* Select DMA endianness (Host-endian: big-endian) */
++ ltq_rcu_w32((ltq_rcu_r32(RCU_USB1CFG) & ~RCU_USBCFG_SLV_END_BIT)
++ | RCU_USBCFG_HOST_END_BIT, RCU_USB1CFG);
++ ltq_rcu_w32(ltq_rcu_r32((RCU_USB2CFG) & ~RCU_USBCFG_SLV_END_BIT)
++ | RCU_USBCFG_HOST_END_BIT, RCU_USB2CFG);
++ }
++
++ if (of_machine_is_compatible("lantiq,ar9")) {
++ /* Hard reset USB state machines */
++ ltq_rcu_w32(ltq_rcu_r32(RCU_USBRESET)
++ | USBRESET_BIT | BIT(28), RCU_USBRESET);
++ udelay(50 * 1000);
++ ltq_rcu_w32(ltq_rcu_r32(RCU_USBRESET)
++ & ~(USBRESET_BIT | BIT(28)), RCU_USBRESET);
++ } else {
++ /* Hard reset USB state machines */
++ ltq_rcu_w32(ltq_rcu_r32(RCU_USBRESET) | USBRESET_BIT, RCU_USBRESET);
++ udelay(50 * 1000);
++ ltq_rcu_w32(ltq_rcu_r32(RCU_USBRESET) & ~USBRESET_BIT, RCU_USBRESET);
++ }
+
+- /* Configure cores to host mode */
+- ltq_rcu_w32(ltq_rcu_r32(RCU_USB1CFG) & ~RCU_USBCFG_HDSEL_BIT,
+- RCU_USB1CFG);
+- ltq_rcu_w32(ltq_rcu_r32(RCU_USB2CFG) & ~RCU_USBCFG_HDSEL_BIT,
+- RCU_USB2CFG);
+-
+- /* Select DMA endianness (Host-endian: big-endian) */
+- ltq_rcu_w32((ltq_rcu_r32(RCU_USB1CFG) & ~RCU_USBCFG_SLV_END_BIT)
+- | RCU_USBCFG_HOST_END_BIT, RCU_USB1CFG);
+- ltq_rcu_w32(ltq_rcu_r32((RCU_USB2CFG) & ~RCU_USBCFG_SLV_END_BIT)
+- | RCU_USBCFG_HOST_END_BIT, RCU_USB2CFG);
+-
+- /* Hard reset USB state machines */
+- ltq_rcu_w32(ltq_rcu_r32(RCU_USBRESET) | USBRESET_BIT, RCU_USBRESET);
+- udelay(50 * 1000);
+- ltq_rcu_w32(ltq_rcu_r32(RCU_USBRESET) & ~USBRESET_BIT, RCU_USBRESET);
+-
+- /* Soft reset USB state machines */
+- ltq_rcu_w32(ltq_rcu_r32(RCU_USBRESET2)
+- | USB1RESET_BIT | USB2RESET_BIT, RCU_USBRESET2);
+- udelay(50 * 1000);
+- ltq_rcu_w32(ltq_rcu_r32(RCU_USBRESET2)
+- & ~(USB1RESET_BIT | USB2RESET_BIT), RCU_USBRESET2);
++ if (of_machine_is_compatible("lantiq,vr9")) {
++ /* Soft reset USB state machines */
++ ltq_rcu_w32(ltq_rcu_r32(RCU_USBRESET2)
++ | USB1RESET_BIT | USB2RESET_BIT, RCU_USBRESET2);
++ udelay(50 * 1000);
++ ltq_rcu_w32(ltq_rcu_r32(RCU_USBRESET2)
++ & ~(USB1RESET_BIT | USB2RESET_BIT), RCU_USBRESET2);
++ }
+ }
+
+ static int __init mips_reboot_setup(void)
+@@ -363,8 +420,11 @@ static int __init mips_reboot_setup(void
+ if (!ltq_rcu_membase)
+ panic("Failed to remap core memory");
+
+- if (of_machine_is_compatible("lantiq,ar9") ||
+- of_machine_is_compatible("lantiq,vr9"))
++ if (of_machine_is_compatible("lantiq,danube") ||
++ of_machine_is_compatible("lantiq,ase") ||
++ of_machine_is_compatible("lantiq,ar9") ||
++ of_machine_is_compatible("lantiq,vr9") ||
++ of_machine_is_compatible("lantiq,ar10"))
+ ltq_usb_init();
+
+ if (of_machine_is_compatible("lantiq,vr9"))
+--- a/arch/mips/lantiq/xway/sysctrl.c
++++ b/arch/mips/lantiq/xway/sysctrl.c
+@@ -254,6 +254,25 @@ static void pmu_disable(struct clk *clk)
+ pr_warn("deactivating PMU module failed!");
+ }
+
++static void usb_set_clock(void)
++{
++ unsigned int val = ltq_cgu_r32(ifccr);
++
++ if (of_machine_is_compatible("lantiq,ar10") ||
++ of_machine_is_compatible("lantiq,grx390")) {
++ val &= ~0x03; /* XTAL divided by 3 */
++ } else if (of_machine_is_compatible("lantiq,ar9") ||
++ of_machine_is_compatible("lantiq,vr9")) {
++ /* TODO: this depends on the XTAL frequency */
++ val |= 0x03; /* XTAL divided by 3 */
++ } else if (of_machine_is_compatible("lantiq,ase")) {
++ val |= 0x20; /* from XTAL */
++ } else if (of_machine_is_compatible("lantiq,danube")) {
++ val |= 0x30; /* 12 MHz, generated from 36 MHz */
++ }
++ ltq_cgu_w32(val, ifccr);
++}
++
+ /* the pci enable helper */
+ static int pci_enable(struct clk *clk)
+ {
+@@ -608,4 +627,5 @@ void __init ltq_soc_init(void)
+
+ if (of_machine_is_compatible("lantiq,vr9"))
+ xbar_fpi_burst_disable();
++ usb_set_clock();
+ }
projects / openwrt / staging / yousong.git / blobdiff