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-rw-r--r--target/linux/ar71xx/patches-4.14/953-qca955x-pci-reset-fixes.patch120
1 files changed, 120 insertions, 0 deletions
diff --git a/target/linux/ar71xx/patches-4.14/953-qca955x-pci-reset-fixes.patch b/target/linux/ar71xx/patches-4.14/953-qca955x-pci-reset-fixes.patch
new file mode 100644
index 0000000000..0acca2a08f
--- /dev/null
+++ b/target/linux/ar71xx/patches-4.14/953-qca955x-pci-reset-fixes.patch
@@ -0,0 +1,120 @@
+--- a/arch/mips/ath79/common.c
++++ b/arch/mips/ath79/common.c
+@@ -153,6 +153,24 @@ void ath79_device_reset_clear(u32 mask)
+ }
+ EXPORT_SYMBOL_GPL(ath79_device_reset_clear);
+
++void ath79_device_reset2_clear(u32 mask)
++{
++ unsigned long flags;
++ u32 reg;
++ u32 t;
++
++ if (soc_is_qca955x())
++ reg = QCA955X_RESET_REG_RESET2_MODULE;
++ else
++ panic("Reset register not defined for this SOC");
++
++ spin_lock_irqsave(&ath79_device_reset_lock, flags);
++ t = ath79_reset_rr(reg);
++ ath79_reset_wr(reg, t & ~mask);
++ spin_unlock_irqrestore(&ath79_device_reset_lock, flags);
++}
++EXPORT_SYMBOL_GPL(ath79_device_reset2_clear);
++
+ u32 ath79_device_reset_get(u32 mask)
+ {
+ unsigned long flags;
+--- a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
++++ b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
+@@ -411,6 +411,7 @@
+ #define QCA955X_PLL_CPU_CONFIG_REG 0x00
+ #define QCA955X_PLL_DDR_CONFIG_REG 0x04
+ #define QCA955X_PLL_CLK_CTRL_REG 0x08
++#define QCA955X_PLL_PCIE_CONFIG_REG 0x0c
+ #define QCA955X_PLL_ETH_XMII_CONTROL_REG 0x28
+ #define QCA955X_PLL_ETH_SGMII_CONTROL_REG 0x48
+ #define QCA955X_PLL_ETH_SGMII_SERDES_REG 0x4c
+@@ -565,6 +566,7 @@
+ #define QCA953X_RESET_REG_PCIE_WMAC_INT_STATUS 0xac
+
+ #define QCA955X_RESET_REG_RESET_MODULE 0x1c
++#define QCA955X_RESET_REG_RESET2_MODULE 0xc4
+ #define QCA955X_RESET_REG_BOOTSTRAP 0xb0
+ #define QCA955X_RESET_REG_EXT_INT_STATUS 0xac
+
+--- a/arch/mips/include/asm/mach-ath79/ath79.h
++++ b/arch/mips/include/asm/mach-ath79/ath79.h
+@@ -178,6 +178,7 @@ static inline u32 ath79_reset_rr(unsigne
+
+ void ath79_device_reset_set(u32 mask);
+ void ath79_device_reset_clear(u32 mask);
++void ath79_device_reset2_clear(u32 mask);
+ u32 ath79_device_reset_get(u32 mask);
+
+ void ath79_cpu_irq_init(unsigned irq_wb_chan2, unsigned irq_wb_chan3);
+--- a/arch/mips/pci/pci-ar724x.c
++++ b/arch/mips/pci/pci-ar724x.c
+@@ -335,18 +335,37 @@ static void ar724x_pci_hw_init(struct ar
+ int wait = 0;
+
+ /* deassert PCIe host controller and PCIe PHY reset */
+- ath79_device_reset_clear(AR724X_RESET_PCIE);
+- ath79_device_reset_clear(AR724X_RESET_PCIE_PHY);
++ if (soc_is_qca955x()) {
++ ath79_device_reset_clear(QCA955X_RESET_PCIE);
++ mdelay(10);
++ ath79_device_reset_clear(QCA955X_RESET_PCIE_PHY);
++ mdelay(10);
++ ath79_device_reset2_clear(QCA955X_RESET_PCIE);
++ mdelay(10);
++ ath79_device_reset2_clear(QCA955X_RESET_PCIE_PHY);
++ mdelay(10);
++ } else {
++ ath79_device_reset_clear(AR724X_RESET_PCIE);
++ ath79_device_reset_clear(AR724X_RESET_PCIE_PHY);
++ }
+
+ /* remove the reset of the PCIE PLL */
+- ppl = ath79_pll_rr(AR724X_PLL_REG_PCIE_CONFIG);
+- ppl &= ~AR724X_PLL_REG_PCIE_CONFIG_PPL_RESET;
+- ath79_pll_wr(AR724X_PLL_REG_PCIE_CONFIG, ppl);
++ if (!soc_is_qca955x()) {
++ ppl = ath79_pll_rr(AR724X_PLL_REG_PCIE_CONFIG);
++ ppl &= ~AR724X_PLL_REG_PCIE_CONFIG_PPL_RESET;
++ ath79_pll_wr(AR724X_PLL_REG_PCIE_CONFIG, ppl);
++ }
+
+ /* deassert bypass for the PCIE PLL */
+- ppl = ath79_pll_rr(AR724X_PLL_REG_PCIE_CONFIG);
+- ppl &= ~AR724X_PLL_REG_PCIE_CONFIG_PPL_BYPASS;
+- ath79_pll_wr(AR724X_PLL_REG_PCIE_CONFIG, ppl);
++ if (soc_is_qca955x()) {
++ ppl = ath79_pll_rr(QCA955X_PLL_PCIE_CONFIG_REG);
++ ppl &= ~AR724X_PLL_REG_PCIE_CONFIG_PPL_BYPASS;
++ ath79_pll_wr(QCA955X_PLL_PCIE_CONFIG_REG, ppl);
++ } else {
++ ppl = ath79_pll_rr(AR724X_PLL_REG_PCIE_CONFIG);
++ ppl &= ~AR724X_PLL_REG_PCIE_CONFIG_PPL_BYPASS;
++ ath79_pll_wr(AR724X_PLL_REG_PCIE_CONFIG, ppl);
++ }
+
+ /* set PCIE Application Control to ready */
+ app = __raw_readl(apc->ctrl_base + AR724X_PCI_REG_APP);
+@@ -422,8 +441,14 @@ static int ar724x_pci_probe(struct platf
+ * Do the full PCIE Root Complex Initialization Sequence if the PCIe
+ * host controller is in reset.
+ */
+- if (ath79_reset_rr(AR724X_RESET_REG_RESET_MODULE) & AR724X_RESET_PCIE)
+- ar724x_pci_hw_init(apc);
++ if (soc_is_qca955x()) {
++ if (ath79_reset_rr(QCA955X_RESET_REG_RESET_MODULE) & QCA955X_RESET_PCIE ||
++ ath79_reset_rr(QCA955X_RESET_REG_RESET2_MODULE) & QCA955X_RESET_PCIE)
++ ar724x_pci_hw_init(apc);
++ } else {
++ if (ath79_reset_rr(AR724X_RESET_REG_RESET_MODULE) & AR724X_RESET_PCIE)
++ ar724x_pci_hw_init(apc);
++ }
+
+ apc->link_up = ar724x_pci_check_link(apc);
+ if (!apc->link_up)