brcm2708: organize kernel patches

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 181 insertions, 0 deletions

diff --git a/target/linux/brcm2708/patches-4.19/950-0498-dwc_otg-Choose-appropriate-IRQ-handover-strategy.patch b/target/linux/brcm2708/patches-4.19/950-0498-dwc_otg-Choose-appropriate-IRQ-handover-strategy.patch
new file mode 100644
index 0000000000..083e0c7f1e
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0498-dwc_otg-Choose-appropriate-IRQ-handover-strategy.patch
@@ -0,0 +1,181 @@
+From 856c8fdf68e589c89ed0518aab727c54fdff5afa Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Tue, 21 May 2019 13:36:52 +0100
+Subject: [PATCH] dwc_otg: Choose appropriate IRQ handover strategy
+
+2711 has no MPHI peripheral, but the ARM Control block can fake
+interrupts. Use the size of the DTB "mphi" reg block to determine
+which is required.
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.org>
+---
+ drivers/usb/host/dwc_otg/dwc_otg_driver.c    |  9 +++--
+ drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.c   | 21 ++++++----
+ drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.h   |  2 +
+ drivers/usb/host/dwc_otg/dwc_otg_hcd_intr.c  | 12 ++++--
+ drivers/usb/host/dwc_otg/dwc_otg_hcd_linux.c | 41 +++++++++++++-------
+ drivers/usb/host/dwc_otg/dwc_otg_os_dep.h    |  3 ++
+ 6 files changed, 60 insertions(+), 28 deletions(-)
+
+--- a/drivers/usb/host/dwc_otg/dwc_otg_driver.c
++++ b/drivers/usb/host/dwc_otg/dwc_otg_driver.c
+@@ -806,14 +806,15 @@ static int dwc_otg_driver_probe(
+ 		if (!request_mem_region(_dev->resource[1].start,
+ 	                                _dev->resource[1].end - _dev->resource[1].start + 1,
+ 	                                "dwc_otg")) {
+-	          dev_dbg(&_dev->dev, "error reserving mapped memory\n");
+-	          retval = -EFAULT;
+-	          goto fail;
+-	}
++			dev_dbg(&_dev->dev, "error reserving mapped memory\n");
++			retval = -EFAULT;
++			goto fail;
++		}
+ 
+ 		dwc_otg_device->os_dep.mphi_base = ioremap_nocache(_dev->resource[1].start,
+ 							    _dev->resource[1].end -
+ 							    _dev->resource[1].start + 1);
++		dwc_otg_device->os_dep.use_swirq = (_dev->resource[1].end - _dev->resource[1].start) == 0x200;
+ 	}
+ 
+ #else
+--- a/drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.c
++++ b/drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.c
+@@ -1347,8 +1347,12 @@ void notrace dwc_otg_fiq_fsm(struct fiq_
+ 	/* We got an interrupt, didn't handle it. */
+ 	if (kick_irq) {
+ 		state->mphi_int_count++;
+-		FIQ_WRITE(state->mphi_regs.outdda, state->dummy_send_dma);
+-		FIQ_WRITE(state->mphi_regs.outddb, (1<<29));
++		if (state->mphi_regs.swirq_set) {
++			FIQ_WRITE(state->mphi_regs.swirq_set, 1);
++		} else {
++			FIQ_WRITE(state->mphi_regs.outdda, state->dummy_send_dma);
++			FIQ_WRITE(state->mphi_regs.outddb, (1<<29));
++		}
+ 
+ 	}
+ 	state->fiq_done++;
+@@ -1406,11 +1410,14 @@ void notrace dwc_otg_fiq_nop(struct fiq_
+ 		state->mphi_int_count++;
+ 		gintmsk.d32 &= state->gintmsk_saved.d32;
+ 		FIQ_WRITE(state->dwc_regs_base + GINTMSK, gintmsk.d32);
+-		/* Force a clear before another dummy send */
+-		FIQ_WRITE(state->mphi_regs.intstat, (1<<29));
+-		FIQ_WRITE(state->mphi_regs.outdda, state->dummy_send_dma);
+-		FIQ_WRITE(state->mphi_regs.outddb, (1<<29));
+-
++		if (state->mphi_regs.swirq_set) {
++			FIQ_WRITE(state->mphi_regs.swirq_set, 1);
++		} else {
++			/* Force a clear before another dummy send */
++			FIQ_WRITE(state->mphi_regs.intstat, (1<<29));
++			FIQ_WRITE(state->mphi_regs.outdda, state->dummy_send_dma);
++			FIQ_WRITE(state->mphi_regs.outddb, (1<<29));
++		}
+ 	}
+ 	state->fiq_done++;
+ 	mb();
+--- a/drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.h
++++ b/drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.h
+@@ -118,6 +118,8 @@ typedef struct {
+ 	volatile void* outdda;
+ 	volatile void* outddb;
+ 	volatile void* intstat;
++	volatile void* swirq_set;
++	volatile void* swirq_clr;
+ } mphi_regs_t;
+ 
+ enum fiq_debug_level {
+--- a/drivers/usb/host/dwc_otg/dwc_otg_hcd_intr.c
++++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd_intr.c
+@@ -220,16 +220,20 @@ exit_handler_routine:
+ 
+ 		/* The FIQ could have sneaked another interrupt in. If so, don't clear MPHI */
+ 		if ((gintmsk_new.d32 == ~0) && (haintmsk_new.d32 == 0x0000FFFF)) {
++			if (dwc_otg_hcd->fiq_state->mphi_regs.swirq_clr) {
++				DWC_WRITE_REG32(dwc_otg_hcd->fiq_state->mphi_regs.swirq_clr, 1);
++			} else {
+ 				DWC_WRITE_REG32(dwc_otg_hcd->fiq_state->mphi_regs.intstat, (1<<16));
+-				if (dwc_otg_hcd->fiq_state->mphi_int_count >= 50) {
+-					fiq_print(FIQDBG_INT, dwc_otg_hcd->fiq_state, "MPHI CLR");
++			}
++			if (dwc_otg_hcd->fiq_state->mphi_int_count >= 50) {
++				fiq_print(FIQDBG_INT, dwc_otg_hcd->fiq_state, "MPHI CLR");
+ 					DWC_WRITE_REG32(dwc_otg_hcd->fiq_state->mphi_regs.ctrl, ((1<<31) + (1<<16)));
+ 					while (!(DWC_READ_REG32(dwc_otg_hcd->fiq_state->mphi_regs.ctrl) & (1 << 17)))
+ 						;
+ 					DWC_WRITE_REG32(dwc_otg_hcd->fiq_state->mphi_regs.ctrl, (1<<31));
+ 					dwc_otg_hcd->fiq_state->mphi_int_count = 0;
+-				}
+-				int_done++;
++			}
++			int_done++;
+ 		}
+ 		haintmsk.d32 = DWC_READ_REG32(&core_if->host_if->host_global_regs->haintmsk);
+ 		/* Re-enable interrupts that the FIQ masked (first time round) */
+--- a/drivers/usb/host/dwc_otg/dwc_otg_hcd_linux.c
++++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd_linux.c
+@@ -474,22 +474,37 @@ static void hcd_init_fiq(void *cookie)
+ 	set_fiq_regs(&regs);
+ #endif
+ 
+-	//Set the mphi periph to  the required registers
+-	dwc_otg_hcd->fiq_state->mphi_regs.base    = otg_dev->os_dep.mphi_base;
+-	dwc_otg_hcd->fiq_state->mphi_regs.ctrl    = otg_dev->os_dep.mphi_base + 0x4c;
+-	dwc_otg_hcd->fiq_state->mphi_regs.outdda  = otg_dev->os_dep.mphi_base + 0x28;
+-	dwc_otg_hcd->fiq_state->mphi_regs.outddb  = otg_dev->os_dep.mphi_base + 0x2c;
+-	dwc_otg_hcd->fiq_state->mphi_regs.intstat = otg_dev->os_dep.mphi_base + 0x50;
+ 	dwc_otg_hcd->fiq_state->dwc_regs_base = otg_dev->os_dep.base;
+-	DWC_WARN("MPHI regs_base at %px", dwc_otg_hcd->fiq_state->mphi_regs.base);
+-	//Enable mphi peripheral
+-	writel((1<<31),dwc_otg_hcd->fiq_state->mphi_regs.ctrl);
++	//Set the mphi periph to the required registers
++	dwc_otg_hcd->fiq_state->mphi_regs.base    = otg_dev->os_dep.mphi_base;
++	if (otg_dev->os_dep.use_swirq) {
++		dwc_otg_hcd->fiq_state->mphi_regs.swirq_set =
++			otg_dev->os_dep.mphi_base + 0x1f0;
++		dwc_otg_hcd->fiq_state->mphi_regs.swirq_clr =
++			otg_dev->os_dep.mphi_base + 0x1f4;
++		DWC_WARN("Fake MPHI regs_base at 0x%08x",
++			 (int)dwc_otg_hcd->fiq_state->mphi_regs.base);
++	} else {
++		dwc_otg_hcd->fiq_state->mphi_regs.ctrl =
++			otg_dev->os_dep.mphi_base + 0x4c;
++		dwc_otg_hcd->fiq_state->mphi_regs.outdda
++			= otg_dev->os_dep.mphi_base + 0x28;
++		dwc_otg_hcd->fiq_state->mphi_regs.outddb
++			= otg_dev->os_dep.mphi_base + 0x2c;
++		dwc_otg_hcd->fiq_state->mphi_regs.intstat
++			= otg_dev->os_dep.mphi_base + 0x50;
++		DWC_WARN("MPHI regs_base at %px",
++			 dwc_otg_hcd->fiq_state->mphi_regs.base);
++
++		//Enable mphi peripheral
++		writel((1<<31),dwc_otg_hcd->fiq_state->mphi_regs.ctrl);
+ #ifdef DEBUG
+-	if (readl(dwc_otg_hcd->fiq_state->mphi_regs.ctrl) & 0x80000000)
+-		DWC_WARN("MPHI periph has been enabled");
+-	else
+-		DWC_WARN("MPHI periph has NOT been enabled");
++		if (readl(dwc_otg_hcd->fiq_state->mphi_regs.ctrl) & 0x80000000)
++			DWC_WARN("MPHI periph has been enabled");
++		else
++			DWC_WARN("MPHI periph has NOT been enabled");
+ #endif
++	}
+ 	// Enable FIQ interrupt from USB peripheral
+ #ifdef CONFIG_ARM64
+ 	irq = otg_dev->os_dep.fiq_num;
+--- a/drivers/usb/host/dwc_otg/dwc_otg_os_dep.h
++++ b/drivers/usb/host/dwc_otg/dwc_otg_os_dep.h
+@@ -102,6 +102,9 @@ typedef struct os_dependent {
+ 	/** Base address for MPHI peripheral */
+ 	void *mphi_base;
+ 
++	/** mphi_base actually points to the SWIRQ block */
++	bool use_swirq;
++
+ 	/** IRQ number (<0 if not valid) */
+ 	int irq_num;
+