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domenico
2025-06-24 16:03:39 +02:00
commit f3256cdaf2
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120
target/linux/ar71xx/patches-4.14/953-qca955x-pci-reset-fixes.patch Normal file
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@@ -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)